阅读说明：本技术 一种干体温度校验仪 (Dry body temperature calibrator ) 是由 陈高飞 李学灿 高洪军 赵士春 于 2020-04-28 设计创作，主要内容包括：本发明公开了一种干体温度校验仪,属于温度仪器仪表校准技术领域,该校验仪包括装设在框架壳体内的炉芯和制冷模块,制冷模块至少包括依次连接且管路连通的微小型压缩机(4)、微小型冷凝散热器(6)、节流元件(7)和缠绕细管,如蒸发细管(16),管路中装有介质,如制冷介质,介质在管路中能循环流动形成闭合的循环。本发明中制冷模块采用蒸汽压缩式制冷,体积紧凑、重量轻,能在炉芯处于高温(50℃以上)状态下启动制冷,降温效率高,能降温至低于-40℃,最低至-196℃,可用于低温、超低温温度校准中。(The invention discloses a dry body temperature calibrator, which belongs to the technical field of calibration of temperature instruments and meters, and comprises a furnace core and a refrigeration module which are arranged in a frame shell, wherein the refrigeration module at least comprises a micro compressor (4), a micro condensation radiator (6), a throttling element (7) and a winding tubule, such as an evaporation tubule (16), which are sequentially connected and communicated through pipelines, and a medium, such as a refrigeration medium, is filled in the pipelines and can circularly flow in the pipelines to form closed circulation. The refrigeration module adopts a vapor compression refrigeration mode, has compact volume and light weight, can start refrigeration when the furnace core is in a high-temperature (more than 50 ℃), has high cooling efficiency, can cool to a temperature lower than-40 ℃ and a temperature as low as-196 ℃, and can be used for low-temperature and ultralow-temperature calibration.)

1. The utility model provides a dry body temperature check gauge, is including installing wick and the refrigeration module in the frame casing, its characterized in that: the refrigeration module at least comprises a micro compressor (4), a micro condensation radiator (6), a throttling element (7) and a winding tubule which are sequentially connected and communicated through pipelines, wherein media are filled in the pipelines, and can circularly flow in the pipelines to form closed circulation; the miniature compressor (4), the miniature condensation radiator (6) and the throttling element (7) are all arranged on the frame shell, the miniature condensation radiator (6) is arranged at a position where heat exchange can be carried out with air outside the frame shell, and the winding tubule is wound on the outer wall of the furnace core.

2. The dry body temperature verifier of claim 1, wherein: the winding tubule is an evaporation tubule (16), the medium in the pipeline is a refrigerant, and the outlet of the evaporation tubule (16), the micro compressor (4), the micro condensation radiator (6), the throttling element (7) and the inlet of the evaporation tubule (16) are communicated in sequence through pipelines to form a closed vapor compression refrigeration cycle;

optionally, the micro compressor (4) is a micro rotor compressor, a micro linear oil-free compressor or a micro piston compressor, the micro condensing radiator (6) is a micro channel radiator, a micro channel finned tube radiator or a micro tube fin heat exchanger, and the throttling element (7) is a self-throttling valve or a throttling capillary tube; the evaporation tubule (16) is a metal light pipe or an internal thread pipe.

3. The dry body temperature verifier according to claim 1 or 2, wherein: the winding tubule is an evaporation tubule (16), the medium in the pipeline is a refrigerant, a heat recovery heat exchanger (8) is additionally arranged in the refrigeration module, the outlet of the micro compressor (4) is connected with the inlet of the micro condensation radiator (6), the outlet of the micro condensation radiator (6) is connected with the heat medium inlet (81) of the heat recovery heat exchanger (8), the heat medium outlet (82) of the heat recovery heat exchanger (8) is connected with the inlet of the throttling element (7), the outlet of the throttling element (7) is connected with the inlet end of the evaporation tubule (16), the outlet end of the evaporation tubule (16) is connected to the cold medium inlet (83) of the heat recovery heat exchanger (8), and the cold medium outlet (84) of the heat recovery heat exchanger (8) is connected with the inlet of the micro compressor (4) to form a closed vapor compression refrigeration cycle;

optionally, the regenerative heat exchanger (8) is a double-pipe heat exchanger, an aluminum plate-fin heat exchanger, a microchannel heat exchanger, or a heat exchanger group formed by connecting a plurality of small heat exchangers in series and in parallel.

4. The dry body temperature verifier of claim 3, wherein: a gas-liquid separator (9) is additionally arranged in the refrigeration module, the outlet of the micro-miniature condensation radiator (6) is connected with the inlet of the gas-liquid separator (9), the gas-phase outlet of the gas-liquid separator (9) is connected into a pipeline communicated with the inlet of the evaporation tubule (16), and the liquid-phase outlet of the gas-liquid separator (9) is connected into a pipeline communicated with the outlet of the evaporation tubule (16);

optionally, the gas-liquid separator (9) is a vertical gravity gas-liquid separator or a vortex gas-liquid separator; preferably, a wire mesh demister is arranged in the gas-liquid separator (9) for capturing the foamy liquid;

preferably, the outlet of the microminiature condensation radiator (6) is connected with the inlet of a gas-liquid separator (9), the gas-phase outlet of the gas-liquid separator (9) is connected with the heat medium inlet (81) of the regenerative heat exchanger (8), and the liquid-phase outlet of the gas-liquid separator (9) is connected into the cold medium loop of the regenerative heat exchanger (8) through a secondary throttling element (18).

5. The dry body temperature verifier of claim 3, wherein: a shell-and-tube gas-liquid separator (9') is additionally arranged in the refrigeration module and comprises a shell and a heat transfer tube bundle arranged in the shell, wherein a tube pass inlet (91) at the upper end of the heat transfer tube bundle is connected with a cold medium outlet (84) of the regenerative heat exchanger (8), a tube pass outlet (92) at the lower end of the heat transfer tube bundle is connected with an inlet of the miniature compressor (4), a shell pass inlet (93) of the shell is connected with an outlet of the miniature condensation radiator (6), a gas phase outlet (94) at the upper part of the shell is connected with a heat medium inlet (81) of the regenerative heat exchanger (8), and a liquid phase outlet (95) at the lower part of the shell is connected into a cold medium loop of the regenerative heat exchanger (8) through a primary throttling element (18);

optionally, a plurality of turn-back baffles are arranged in the shell of the shell-and-tube gas-liquid separator (9').

6. The dry body temperature verifier of claim 2, 3, or 4, wherein: a front-stage heat exchanger (10) is additionally arranged in the refrigeration module, the outlet of the microminiature condensation radiator (6) is connected with the heat medium inlet of the front-stage heat exchanger (10), the heat medium outlet of the front-stage heat exchanger (10) is connected into a pipeline communicated with the inlet of the evaporation tubule (16), and the cold medium inlet of the front-stage heat exchanger (10) is connected into a pipeline communicated with the outlet of the evaporation tubule (16);

optionally, the preceding heat exchanger (10) is a double-pipe heat exchanger, an aluminum plate-fin heat exchanger or a microchannel heat exchanger;

preferably, the outlet of the micro-miniature condensation radiator (6) is connected with the heat medium inlet of the front-stage heat exchanger (10), the heat medium outlet of the front-stage heat exchanger (10) is connected with the inlet of the gas-liquid separator (9), the cold medium outlet (84) of the regenerative heat exchanger (8) is connected with the cold medium inlet of the front-stage heat exchanger (10), and the cold medium outlet of the front-stage heat exchanger (10) is connected with the inlet of the micro-miniature compressor (4).

7. The dry body temperature verifier of claim 1, wherein: the winding thin pipe is a cold carrying thin pipe (17), and the refrigeration module consists of a refrigeration cycle unit and a cold carrying cycle unit which are composed of a micro compressor (4), a micro condensation radiator (6), a throttling element (7), a cold carrying pump (14), a cold carrying heat exchanger (15) and the cold carrying thin pipe (17); wherein:

in the refrigeration cycle unit, a micro compressor (4), an inlet of a micro condensing radiator (6), a throttling element (7), a cold medium inlet (151) of a cold-carrying heat exchanger (15), a cold medium outlet (152) of the cold-carrying heat exchanger (15) and the micro compressor (4) are sequentially connected through pipelines, a medium in a pipeline of the refrigeration cycle unit is a refrigerant, and the refrigerant forms a closed vapor compression refrigeration cycle in the refrigeration cycle unit;

in the cold-carrying circulation unit, a heat medium outlet (154) of the cold-carrying heat exchanger (15), a cold-carrying pump (14), a cold-carrying thin pipe (17) and a heat medium inlet (153) of the cold-carrying heat exchanger (15) are sequentially connected through pipelines, a medium in a pipeline of the cold-carrying circulation unit is a cold-carrying agent, and the cold-carrying agent forms a closed pump-driving cold-carrying circulation in the cold-carrying circulation unit;

optionally, the cold-carrying pump is a low-temperature-resistant liquid gear pump, a piston pump or other types of liquid pumps, the cold-carrying heat exchanger is a low-temperature-resistant plate heat exchanger, a plate-fin heat exchanger, a double-pipe heat exchanger, a shell-and-tube heat exchanger or other types of low-temperature-resistant heat exchangers, and the cold-carrying tubules are metal pipe fittings such as copper tubes, stainless steel tubes and aluminum alloy tubes.

8. The dry body temperature verifier according to any one of claims 2 to 7, wherein: an oil separator (5) is added in a refrigeration module or a refrigeration cycle unit, an outlet of the micro compressor (4) is connected with an inlet of the oil separator (5), a working medium outlet (51) of the oil separator (5) is connected with an inlet of the micro condensation radiator (6), and an oil discharge port (52) of the oil separator (5) is connected with an inlet of the micro compressor (4).

9. The dry body temperature verifier according to any one of claims 2 to 8, wherein: a refrigerant circulating tank (19) is added in the refrigeration module or the refrigeration circulating unit and is arranged on a front pipeline of an inlet of the micro compressor (4), and an outlet of the refrigerant circulating tank (19) is connected with the inlet of the micro compressor (4).

10. The dry body temperature verifier according to any one of claims 2 to 7 and 9, wherein: a refrigerant storage tank (11) is added, the refrigerant storage tank (11) is provided with two inlets and outlets, one inlet and outlet is connected to the outlet of the miniature compressor (4) through a refrigerant inlet tank valve (12), and the other inlet and outlet is connected to the inlet of the miniature compressor (4) through a refrigerant outlet tank valve (13).

11. The dry body temperature verifier of claim 8, wherein: a refrigerant storage tank (11) is additionally arranged, the refrigerant storage tank (11) is provided with two inlets and outlets, one inlet and outlet is connected to a working medium outlet (51) of the oil separator (5) through a refrigerant inlet tank valve (12), and the other inlet and outlet is connected to an inlet of the micro compressor (4) through a refrigerant outlet tank valve (13).

12. The dry body temperature verifier according to any one of claims 1-11, wherein: a heating element is arranged in the furnace core (3),

the heating element is an electric heating rod and is inserted into a hole arranged in the furnace core; or the heating element is an electric heating wire which is arranged on the outer surface of the furnace core (3) in a staggered manner; or the heating element is an electric heating sheet, and the positions of the winding tubules are staggered and attached to the outer surface of the furnace core (3).

13. The dry body temperature verifier according to any one of claims 1-11, wherein: a liquid containing space is arranged in the furnace core (3), the liquid containing space is filled with liquid,

optionally, the liquid is water, antifreeze, silicone oil, or alcohol;

optionally, the liquid containing space in the furnace core is cylindrical or square column shaped.

Technical Field

The invention belongs to the technical field of calibration of temperature instruments and meters, particularly relates to a dry body temperature calibrator, and particularly relates to a dry body temperature calibrator for realizing low-temperature calibration by adopting vapor compression refrigeration.

Background

The traditional temperature verification system is often large in size and weight and is not suitable for carrying, so that the application scene is limited. To solve this problem, dry body temperature check meters have come to mind. The furnace core of the dry body temperature calibrator adopts the soaking block to heat or refrigerate, the temperature rising and reducing speed is high, meanwhile, the equipment is small in size, can be conveniently carried to an operation field, and is widely applied to calibration of temperature instruments in the field or in a laboratory at present.

When the dry body temperature calibrator is used for metering calibration below the ambient temperature, a refrigeration system is required to cool the furnace core so as to obtain a low-temperature condition. The most common refrigeration mode of the current dry body temperature check meter is semiconductor refrigeration, a semiconductor refrigerator (Thermoelectric cooler) utilizes the Thermoelectric effect of a semiconductor to produce cold (also called as a Thermoelectric cooler, two different metals are connected by a conductor, and the temperature of one joint is reduced and the temperature of the other joint is increased when a direct current is switched on), and the refrigeration system of the mode has small volume, quick refrigeration response, low refrigeration efficiency, large electric energy consumption and large heat dissipation capacity, and the lowest temperature can only reach about-40 ℃, thereby greatly limiting the application scene. The other type of dry body temperature calibrator adopts a Stirling refrigeration mode, the lowest service temperature can reach-100 ℃, the hardware integration level and the integration degree of a refrigeration system are high, the refrigeration temperature is flexibly adjusted, but the weight is large, the cost is high, the instrument cannot be started for protection when a furnace core is in a high-temperature state (higher than 50 ℃), and the application scene of the instrument is greatly limited.

Disclosure of Invention

The invention aims to provide a dry body temperature calibrator which can be started at high temperature and cooled rapidly in a refrigerating system.

The invention provides a dry body temperature calibrator, which comprises a furnace core and a refrigeration module which are arranged in a frame shell, wherein the refrigeration module at least comprises a micro compressor (4), a micro condensation radiator (6), a throttling element (7) and a winding tubule which are sequentially connected and communicated through pipelines, a medium is contained in the pipelines, and the medium can circularly flow in the pipelines to form closed circulation; the miniature compressor (4), the miniature condensation radiator (6) and the throttling element (7) are all arranged on the frame shell, the miniature condensation radiator (6) is arranged at a position where heat exchange can be carried out with air outside the frame shell, and the winding tubule is wound on the outer wall of the furnace core. In particular, the method comprises the following steps of,

in the dry body temperature calibrator of the first embodiment, the winding tubule is an evaporation tubule (16), the medium in the pipeline is a refrigerant, and an outlet of the evaporation tubule (16), the micro compressor (4), the micro condensation radiator (6), the throttling element (7) and an inlet of the evaporation tubule (16) are communicated in sequence through pipelines to form a closed vapor compression refrigeration cycle. Optionally, the micro compressor (4) is a micro rotor compressor, a micro linear oil-free compressor or a micro piston compressor, the micro condensing radiator (6) is a micro channel radiator, a micro channel finned tube radiator or a micro tube fin heat exchanger, and the throttling element (7) is a self-throttling valve or a throttling capillary tube; the evaporation tubule (16) is a metal light pipe or an internal thread pipe.

In the dry body temperature calibrator of the second embodiment, the winding tubule is an evaporation tubule (16), the medium in the pipeline is a refrigerant, a recuperative heat exchanger (8) is additionally arranged in the refrigeration module of the first embodiment, an outlet of a micro compressor (4) is connected with an inlet of a micro condensation radiator (6), an outlet of the micro condensation radiator (6) is connected with a heat medium inlet (81) of the recuperative heat exchanger (8), a heat medium outlet (82) of the recuperative heat exchanger (8) is connected with an inlet of a throttling element (7), an outlet of the throttling element (7) is connected with an inlet end of an evaporation tubule (16), an outlet end of the evaporation tubule (16) is connected with a cold medium inlet (83) of the recuperative heat exchanger (8), and a cold medium outlet (84) of the recuperative heat exchanger (8) is connected with an inlet of the micro compressor (4) to form a closed vapor compression refrigeration cycle. Optionally, the regenerative heat exchanger (8) is a double-pipe heat exchanger, an aluminum plate-fin heat exchanger, a microchannel heat exchanger, or a heat exchanger group formed by connecting a plurality of small heat exchangers in series and in parallel.

In the dry body temperature calibrator of the third embodiment, a gas-liquid separator (9) is additionally arranged in the refrigeration module of the second embodiment, the outlet of the micro-miniature condensation radiator (6) is connected with the inlet of the gas-liquid separator (9), the gas-phase outlet of the gas-liquid separator (9) is connected into a pipeline communicated with the inlet of the evaporation tubule (16), and the liquid-phase outlet of the gas-liquid separator (9) is connected into a pipeline communicated with the outlet of the evaporation tubule (16). Optionally, the gas-liquid separator (9) is a vertical gravity gas-liquid separator or a vortex gas-liquid separator; preferably, a wire mesh demister is arranged in the gas-liquid separator (9) for capturing the foamy liquid. Preferably, a gas-liquid separator (9) is additionally arranged in the refrigeration module of the second embodiment, the outlet of the miniature condensation radiator (6) is connected with the inlet of the gas-liquid separator (9), the gas-phase outlet of the gas-liquid separator (9) is connected with the heat medium inlet (81) of the regenerative heat exchanger (8), and the liquid-phase outlet of the gas-liquid separator (9) is connected into the cold medium loop of the regenerative heat exchanger (8) through a primary throttling element (18).

In the dry body temperature calibrator of the fourth embodiment, a shell-and-tube gas-liquid separator (9') is additionally arranged in a refrigeration module of the second embodiment, and comprises a shell and a heat transfer tube bundle arranged in the shell, wherein a tube pass inlet (91) at the upper end of the heat transfer tube bundle is connected with a cold medium outlet (84) of a regenerative heat exchanger (8), a tube pass outlet (92) at the lower end of the heat transfer tube bundle is connected with an inlet of a miniature compressor (4), a shell pass inlet (93) of the shell is connected with an outlet of a miniature condensing radiator (6), a gas phase outlet (94) at the upper part of the shell is connected with a heat medium inlet (81) of the regenerative heat exchanger (8), and a liquid phase outlet (95) at the lower part of the shell is connected to a cold medium loop of the regenerative heat exchanger (8) through a primary throttling element (18). Optionally, a plurality of turn-back baffles are arranged in the shell of the shell-and-tube gas-liquid separator (9').

In the dry body temperature checker according to the fifth embodiment, a front-stage heat exchanger (10) is added to the refrigeration module according to the first or second embodiment, the outlet of the micro-miniature condensation radiator (6) is connected to the heat medium inlet of the front-stage heat exchanger (10), the heat medium outlet of the front-stage heat exchanger (10) is connected to a pipeline communicating with the inlet of the evaporation tubule (16), and the cold medium inlet of the front-stage heat exchanger (10) is connected to a pipeline communicating with the outlet of the evaporation tubule (16). Optionally, the pre-heat exchanger (10) is a double-pipe heat exchanger, an aluminum plate-fin heat exchanger or a microchannel heat exchanger. Preferably, a front-stage heat exchanger (10) is additionally arranged in the refrigeration module of the third embodiment, the outlet of the micro-miniature condensation radiator (6) is connected with the heat medium inlet of the front-stage heat exchanger (10), the heat medium outlet of the front-stage heat exchanger (10) is connected with the inlet of the gas-liquid separator (9), the cold medium outlet (84) of the backheating heat exchanger (8) is connected with the cold medium inlet of the front-stage heat exchanger (10), and the cold medium outlet of the front-stage heat exchanger (10) is connected with the inlet of the micro-miniature compressor (4).

In the dry body temperature calibrator of the sixth embodiment, the winding tubule is a cold carrying tubule (17), and the refrigeration module comprises a refrigeration cycle unit and a cold carrying cycle unit which are composed of a micro compressor (4), a micro condensation radiator (6), a throttling element (7), a cold carrying pump (14), a cold carrying heat exchanger (15) and the cold carrying tubule (17); wherein: in the refrigeration cycle unit, a micro compressor (4), an inlet of a micro condensing radiator (6), a throttling element (7), a cold medium inlet (151) of a cold-carrying heat exchanger (15), a cold medium outlet (152) of the cold-carrying heat exchanger (15) and the micro compressor (4) are sequentially connected through pipelines, a medium in a pipeline of the refrigeration cycle unit is a refrigerant, and the refrigerant forms a closed vapor compression refrigeration cycle in the refrigeration cycle unit; in the cold-carrying circulation unit, a heat medium outlet (154) of the cold-carrying heat exchanger (15), a cold-carrying pump (14), a cold-carrying thin pipe (17) and a heat medium inlet (153) of the cold-carrying heat exchanger (15) are sequentially connected through pipelines, a medium in a pipeline of the cold-carrying circulation unit is a cold-carrying agent, and the cold-carrying agent forms a closed pump-driving cold-carrying circulation in the cold-carrying circulation unit. Optionally, the cold-carrying pump is a low-temperature-resistant liquid gear pump, a piston pump or other types of liquid pumps, the cold-carrying heat exchanger is a low-temperature-resistant plate heat exchanger, a plate-fin heat exchanger, a double-pipe heat exchanger, a shell-and-tube heat exchanger or other types of low-temperature-resistant heat exchangers, and the cold-carrying tubules are metal pipe fittings such as copper tubes, stainless steel tubes and aluminum alloy tubes.

In the dry body temperature checker of the seventh embodiment, an oil separator (5) is added to the refrigeration module or the refrigeration cycle unit of any of the first to sixth embodiments, an outlet of the micro compressor (4) is connected to an inlet of the oil separator (5), a working medium outlet (51) of the oil separator (5) is connected to an inlet of the micro condensation radiator (6), and an oil discharge port (52) of the oil separator (5) is connected to an inlet of the micro compressor (4).

In the dry body temperature checker according to the eighth embodiment, a refrigerant circulation tank (19) is added to the refrigeration module or the refrigeration cycle unit according to any one of the first to seventh embodiments, the refrigerant circulation tank is provided in a pipe line in front of an inlet of the micro compressor (4), and an outlet of the refrigerant circulation tank (19) is connected to the inlet of the micro compressor (4).

In the dry body temperature calibrator of the ninth embodiment, a refrigerant storage tank (11) is added in any one of the first to sixth and eighth embodiments, the refrigerant storage tank (11) is provided with two inlets and outlets, one inlet and outlet is connected to the outlet of the micro compressor (4) through a refrigerant inlet tank valve (12), and the other inlet and outlet is connected to the inlet of the micro compressor (4) through a refrigerant outlet tank valve (13). Or, in the seventh embodiment, one refrigerant storage tank (11) is added, the refrigerant storage tank (11) is provided with two inlets and outlets, one inlet and outlet is connected to the working medium outlet (51) of the oil separator (5) through a refrigerant inlet tank valve (12), and the other inlet and outlet is connected to the inlet of the micro compressor (4) through a refrigerant outlet tank valve (13).

In a dry body temperature checker according to another embodiment, a heating element is provided in the furnace core (3) according to all the embodiments described above. The heating element is an electric heating rod and is inserted into a hole arranged in the furnace core; or the heating element is an electric heating wire which is arranged on the outer surface of the furnace core (3) in a staggered manner; or the heating element is an electric heating sheet, and the positions of the winding tubules are staggered and attached to the outer surface of the furnace core (3).

In the dry body temperature checker according to another embodiment, a liquid holding space is provided in the furnace core (3) according to all the above embodiments, and the liquid holding space is filled with liquid. Optionally, the liquid is water, antifreeze, silicone oil, or alcohol; optionally, the liquid containing space in the furnace core is cylindrical or square column shaped.

By adopting the technical scheme, the steam compression type refrigeration module is arranged in the dry body temperature calibrator, so that the dry body temperature calibrator has smaller volume and weight and meets the portability requirement of the dry body temperature calibrator; the refrigeration efficiency of the refrigerator is obviously superior to that of other refrigeration modes (such as a semiconductor refrigeration mode, a Stirling refrigeration mode and the like), the energy is saved, the cooling speed is high, the cost is low, and the refrigerator can be produced and applied on a large scale. The temperature of the dry body temperature calibrator is reduced from 150 ℃ to-100 ℃ for only 100 minutes, and the temperature of the dry body temperature calibrator adopting the Stirling refrigeration mode is reduced from 150 ℃ to-90 ℃ for 180 minutes.

The refrigeration module in the dry body temperature calibrator adopts a vapor compression refrigeration mode, absorbs the heat of the furnace core during working, cools the furnace core, provides a metering detection low-temperature environment for the furnace core, has excellent rapid cooling performance on the premise of keeping compact volume and light weight, and can realize ultralow temperature calibration of below-40 ℃ and at the lowest temperature of-196 ℃; when the furnace body in the dry body temperature check meter is in a high temperature (up to 150 ℃) state, the refrigerating system can still be started at any time, the refrigerating module can quickly cool the furnace body, the high temperature of the furnace body does not influence the starting of the refrigerating system, and the dry body temperature check meter adopting the Stirling refrigerating mode can be started only when the furnace core is naturally cooled to below 50 ℃ (the process generally waits for dozens of minutes).

Drawings

FIG. 1 is a schematic structural view of a dry body temperature checker according to an embodiment 1 of the present invention;

FIG. 2 is a schematic view showing the internal structure of the dry body temperature checker according to example 2;

FIG. 3 is a schematic view showing the internal structure of a dry body temperature checker in example 3;

FIG. 4 is a schematic view showing the internal structure of the dry body temperature checker according to example 4;

FIG. 5 is a schematic view showing the internal structure of a dry body temperature checker in example 5;

FIG. 6 is a schematic view showing the internal structure of the dry body temperature checker according to example 6;

FIG. 7 is a schematic view showing the internal structure of a dry body temperature checker in accordance with example 7;

FIG. 8 is a schematic view showing the internal structure of a dry body temperature checker in accordance with example 8;

FIG. 9 is a schematic view showing the internal structure of a dry body temperature checker in accordance with example 9;

FIG. 10 is a schematic view showing an internal structure of a dry body temperature checker according to example 10;

FIG. 11 is a schematic view showing an internal structure of a dry body temperature checker in accordance with example 11;

FIG. 12 is a graph showing the cooling rate of the wick according to the cooling method of the present invention and the Stirling cooling method;

fig. 13 is a temperature drop curve of the refrigeration mode of the dry body temperature checker according to example 1 for the furnace core.

In the figure: 1-a frame housing; 2-a refrigeration module; 3-furnace core; 4-a micro compressor; 5-an oil separator; 6-micro condensing radiator; 7-a throttling element; 8-a regenerative heat exchanger; 9-gas-liquid separator; 9' -shell-and-tube gas-liquid separator; 10-a preceding stage heat exchanger; 11-a refrigerant reservoir; 12-refrigerant inlet tank valve; 13-refrigerant outlet tank valve; 14-cold carrying pump; 15-cold load heat exchanger; 16-evaporation tubules; 17-cold carrying tubules; 18-a secondary throttling element; 19-refrigerant circulation tank.

Detailed Description

The steam compression type refrigeration mode can utilize latent heat generated by phase change of a refrigeration working medium, realizes refrigeration through closed circulation of four processes of compression, condensation, throttling and evaporation, has higher refrigeration efficiency and low cost, and is a circulating refrigeration mode which is most widely applied at present.

However, the conventional vapor compression type refrigeration method cannot be used for a dry body temperature checker because: the dry body temperature calibrator is light and flexible in adaptation and high in requirements on volume and weight, and a compressor, a condenser and a heat exchanger in a conventional vapor compression refrigeration cycle are too large in volume and weight for the dry body temperature calibrator, so that the application of the refrigeration mode in the dry body temperature calibrator is limited.

The invention uses the microminiature vapor compression refrigeration system mainly composed of a microminiature compressor, a microminiature condensation radiator and a small heat exchanger in a dry body temperature calibrator, can realize ultralow temperature calibration at the lowest refrigeration temperature of-196 ℃, and can directly start up at any time in a wide temperature range (from the lowest temperature to 150 ℃) for rapid refrigeration due to the arrangement of a regenerative heat exchanger.

The dry body temperature calibrator provided by the invention can be seen from figure 1, and at least comprises a furnace core 3 and a refrigeration module 2 which are arranged in a frame shell 1, wherein the furnace core is used for placing a temperature instrument to be calibrated, and the refrigeration module 2 is used for cooling the furnace core. Wherein the content of the first and second substances,

the refrigeration module 2 at least comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7 and a winding tubule wound on the outer wall surface of the furnace core 3 which are sequentially connected and communicated through pipelines, and the medium contained in the pipelines can circularly flow in the pipelines to form closed circulation. Here, the micro compressor 4, the micro condensing radiator 6, and the throttling element 7 are all installed on the frame casing, and the micro condensing radiator 6 is installed at a position where it can exchange heat with the air outside the frame casing (including a case where the air outside the frame casing is sucked into the frame casing, and the air heated by the heat exchange is discharged out of the frame casing). The micro compressor 4 is used for driving the refrigerant filled in the refrigeration module pipeline, so that the refrigerant circularly flows in the refrigeration module pipeline. The furnace core 3 is a deep groove type structure and is made of heat-conducting materials, and a groove body is arranged inside the frame shell 1; the microminiature condensation radiator 6 is used for radiating heat to the ambient air; the throttling element 7 is a standard component of vapor compression refrigeration and is used for throttling and cooling a refrigeration system, and a throttled refrigerant can evaporate and absorb heat to realize a refrigeration effect.

In one embodiment (in combination with embodiment 1-embodiment 10), the refrigeration module 2 adopts a vapor compression refrigeration cycle refrigeration mode, the winding tubule on the outer wall surface of the furnace core 3 is an evaporation tubule 16, and the medium in the tubule is a refrigerant. Referring to fig. 1, the refrigeration module 2 at least comprises a micro compressor 4, a micro condensing radiator 6, a throttling element 7 and an evaporation tubule 16; the outlet of the evaporation tubule 16, the micro compressor 4, the micro condensation radiator 6, the throttling element 7 and the inlet of the evaporation tubule 16 are connected in sequence and communicated through pipelines to form a closed vapor compression refrigeration cycle. The inside of the evaporation tubule 16 is filled with a refrigerant and wound on the outer surface of the furnace core 3, and the outer surface of the evaporation tubule 16 is closely contacted with the outer surface of the groove body of the furnace core 3. For a detailed description, see example 1-example 10.

In another embodiment (in combination with example 11), the refrigeration module is constructed by using a vapor compression refrigeration cycle and a pump-driven cold-carrying cycle, and includes a refrigeration cycle unit and a cold-carrying cycle unit, the wound tubule on the outer wall surface of the furnace core 3 is a cold-carrying tubule 17, the medium in the pipeline of the refrigeration cycle unit is a refrigerant, and the medium in the pipeline of the cold-carrying cycle unit is a cold-carrying refrigerant. Referring to fig. 11, the refrigeration module comprises a micro compressor 4, a micro condensing radiator 6, a throttling element 7, a cold-carrying pump 14, a cold-carrying heat exchanger 15 and a cold-carrying tubule 17, wherein: in the refrigeration cycle unit, a micro compressor 4, an inlet of a micro condensing radiator 6, a throttling element 7, a cold medium inlet 151 of a cold carrying heat exchanger 15, a cold medium outlet 152 of the cold carrying heat exchanger 15 and the micro compressor 4 are sequentially connected through pipelines, and a refrigerant forms a closed vapor compression refrigeration cycle in the refrigeration cycle unit; in the cold-carrying circulation unit, a hot medium outlet 154 of the cold-carrying heat exchanger 15, the cold-carrying pump 14, the cold-carrying tubule 17 and a hot medium inlet 153 of the cold-carrying heat exchanger 15 are sequentially connected by pipelines, a cold-carrying agent forms a closed pump-driving cold-carrying circulation in the cold-carrying circulation unit, the cold-carrying tubule 17 is filled with the cold-carrying agent and wound on the outer surface of the furnace core 3, and the outer surface of the cold-carrying tubule 17 is in close contact with the outer surface of the groove body of the furnace core 3. See example 11 for a detailed description.

The method for verifying the temperature of the verified temperature instrument by using the dry body temperature calibrator can comprise the following operations:

1. and putting the checked temperature instrument into the furnace core, switching on a power supply of the dry body temperature calibrator, and turning on a switch to start the operation of the calibrator.

2. And setting a target temperature point, when the set target temperature is lower than the current temperature, starting the refrigeration function of the calibrator, starting the refrigeration system to work, and cooling the furnace core.

3. When the displayed actual furnace core temperature reaches the set target temperature, the temperature of a calibrated temperature instrument (such as a thermometer) in the furnace core can be detected after the temperature is stably prompted by the instrument.

4. If the detection of other temperature points is required, the steps 2 and 3 can be repeated.

5. And after the detection is finished, closing the temperature controller switch.

The present invention will be described more specifically and further illustrated with reference to specific examples, which are by no means intended to limit the scope of the present invention.

Example 1

The dry body temperature calibrator provided in the present embodiment is provided with a frame casing 1, and a furnace core 3 and a refrigeration module 2 are disposed inside the frame casing 1, as shown in fig. 1 and described above in connection with fig. 1. The refrigeration module 2 is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7 and an evaporation tubule 16. The outlet of the micro compressor 4 is connected with the inlet of the micro condensing radiator 6 through a pipeline, the outlet of the micro condensing radiator 6 is connected with the inlet of the throttling element 7 through a pipeline, the outlet of the throttling element 7 is connected with the inlet end of the evaporation tubule 16 through a pipeline, and the outlet end of the evaporation tubule 16 is connected with the inlet of the micro compressor 4 through a pipeline, so that a closed vapor compression refrigeration cycle is formed. The micro compressor 4 drives the refrigerant which is filled in the pipeline of the refrigeration module 2 for circulation, so that the refrigerant circulates in the refrigeration module 2. The miniature condensation radiator 6 is arranged on the frame shell 1 and is in contact with the outside air, and the miniature condensation radiator with a fan can bring heat to the outside of the calibrator.

In this embodiment, the micro compressor 4 may be selected from a micro rotor compressor, a micro linear oil-free compressor, or a micro piston compressor. The micro-miniature condensing radiator 6 can be selected from a micro-channel radiator, a micro-channel finned tube radiator or a micro-tube fin heat exchanger. The throttling element 7 may be selected from a throttle valve or a throttle capillary. The thin evaporator tube 16 may be selected from a metal light tube or an internally threaded tube. The components in the refrigeration module 2 are all commercially available.

The working principle of the dry body temperature calibrator of the embodiment is as follows: refrigerant is filled in a refrigeration cycle pipeline of the refrigeration module 2, and after being compressed into high-pressure gas by the microminiature compressor 4, the refrigerant is discharged to the microminiature condensation radiator 6 from an outlet; the refrigerant releases heat in the micro condensation radiator 6, the heat is discharged to the air around the dry body temperature calibrator (the heat is brought to the outside of the calibrator by the air blown by the fan), the refrigerant is converted into high-pressure liquid from high-pressure gas after passing through the micro condensation radiator 6, the high-pressure liquid enters the throttling element 7, the high-pressure liquid becomes low-pressure low-temperature gas-liquid two-phase flow after throttling, the low-pressure low-temperature gas enters the evaporation tubule 16 from the outlet of the throttling element 7 through the inlet end of the evaporation tubule 16, the low-pressure low-temperature refrigerant continuously absorbs the heat from the furnace core in the evaporation tubule 16 and is evaporated and gasified, and finally the low-pressure refrigerant gas flows out from the outlet end of the evaporation tubule 16 and returns to the inlet of the micro compressor 4 to complete a refrigeration cycle. The refrigerant absorbs the heat of the furnace core 3 when evaporating and gasifying in the evaporation tubule 16, thereby reducing the temperature of the furnace core 3 and providing a cooling or low-temperature environment for the metering calibration of the temperature.

Tests have shown that the cooling module of example 1 can cool the wick from ambient temperature (room temperature, e.g. 20 ℃) to-40 ℃ in 30 minutes using a conventional refrigerant (e.g. R404a), see fig. 13. The cooling curves of the other embodiments are similar and are not provided one by one.

Example 2

The dry body temperature calibrator provided in this embodiment is an improvement based on embodiment 1, and as shown in fig. 2, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle, and is different from the embodiment 1 in that a regenerative heat exchanger 8 is additionally arranged in the refrigeration module, namely the refrigeration module comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7, the regenerative heat exchanger 8 and an evaporation tubule 16. The outlet of the micro compressor 4 is connected with the inlet of the micro condensing radiator 6, the outlet of the micro condensing radiator 6 is connected with the heat medium inlet 81 of the regenerative heat exchanger 8, the heat medium outlet 82 of the regenerative heat exchanger 8 is connected with the inlet of the throttling element 7, the outlet of the throttling element 7 is connected with the inlet end of the evaporation tubule 16, the outlet end of the evaporation tubule 16 is connected with the cold medium inlet 83 of the regenerative heat exchanger 8, and the cold medium outlet 84 of the regenerative heat exchanger 8 is connected with the inlet of the micro compressor 4, so that a closed vapor compression type refrigeration cycle is formed.

The regenerative heat exchanger 8 is a heat exchanger group composed of a double-pipe heat exchanger, an aluminum plate-fin heat exchanger, a micro-channel heat exchanger or a plurality of small heat exchangers connected in series and parallel.

Compared with the embodiment 1, the embodiment is additionally provided with the regenerative heat exchanger 8, and the refrigerant flowing out of the outlet of the miniature condensation radiator 6 and the refrigerant flowing out of the evaporation tubules 16 respectively exchange heat in the regenerative heat exchanger 8 as hot fluid and cold fluid in the cycle.

In this embodiment, taking the example of filling the refrigeration module 2 with the multi-component mixed refrigerant (for example: 15% of methane, 30% of ethane, 35% of propane, and 20% of isobutane), the refrigeration module of example 2 can cool the furnace core from the ambient temperature (20 ℃) to-80 ℃ within 60 minutes.

The working principle of the dry body temperature calibrator of the embodiment is as follows: multi-component mixed refrigerant is filled in the refrigeration cycle, only part of the refrigerant is cooled into liquid after being cooled by the microminiature condensing radiator 6, the refrigerant is further cooled in the regenerative heat exchanger 8 through heat exchange of cold and hot liquid flows before entering the throttling element 7, and more components of the mixed refrigerant and more gas-phase refrigerant are gradually cooled into liquid; the refrigerant flowing out of the evaporation tubules 16 is an incompletely evaporated gas-liquid two-phase flow, and is further heated by heat exchange in the regenerative heat exchanger 8 before flowing back to the suction port of the micro compressor 4, and more components and more liquid-phase refrigerant of the mixed refrigerant are gradually evaporated into gas and heated to a higher temperature. After the heat recovery and exchange process in the heat recovery and exchange device 8, the high-pressure refrigerant has lower temperature before entering the throttling element 7, and can obtain lower refrigeration evaporation temperature after the throttling element 7 is throttled, and the low-pressure refrigerant at the air return end of the compressor is heated to normal temperature before entering the air suction port of the micro compressor 4, so that the liquid inlet damage and the low-temperature damage of the compressor are avoided.

Limited by the physical characteristics of the conventional refrigerant, the conventional vapor compression refrigeration without regenerative heat exchange (as in example 1) can generally realize a refrigeration temperature of not lower than-40 ℃ at an ambient temperature of more than 20 ℃; through the above flow structure, the refrigeration module of this embodiment 2 can implement low-temperature refrigeration of the furnace core to-196 ℃.

Example 3

The dry body temperature calibrator provided in this embodiment is an improvement based on embodiment 2, and as shown in fig. 3, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module 2 is constructed by adopting a vapor compression refrigeration cycle, and is different from the embodiment 2 in that a gas-liquid separator 9 is additionally arranged in the refrigeration module, namely the refrigeration module comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7, a regenerative heat exchanger 8, a gas-liquid separator 9 and an evaporation thin tube 16. The outlet of the micro compressor 4 is connected with the inlet of the micro condensing radiator 6, the outlet of the micro condensing radiator 6 is connected with the inlet of the gas-liquid separator 9, the gas-phase outlet (located above in the figure 3) of the gas-liquid separator 9 is connected with the heat medium inlet of the regenerative heat exchanger 8, the heat medium outlet of the regenerative heat exchanger 8 is connected with the inlet of the throttling element 7, the outlet of the throttling element 7 is connected with the inlet end of the evaporation tubule 16, the outlet end of the evaporation tubule 16 is connected with the cold medium inlet of the regenerative heat exchanger 8, and the cold medium outlet of the regenerative heat exchanger 8 is connected with the inlet of the micro compressor 4, so that a closed steam compression type refrigeration cycle is formed. Furthermore, the liquid phase outlet of the gas-liquid separator 9 (shown in fig. 3 below) is connected via a secondary throttling element 18 to the cold medium circuit of the recuperator 8, such as to the cold medium inlet of the recuperator 8, to the cold medium outlet, or to an intermediate position of the cold medium circuit of the recuperator 8.

The gas-liquid separator 9 is selected from a vertical gravity gas-liquid separator or a vortex gas-liquid separator. Can set up the silk screen demister in the vapour and liquid separator 9 and be used for increasing refrigerant gas-liquid separation's effect (because foam liquid weight is little, easily mix with and flow in gaseous and influence the gas-liquid separation effect), the silk screen demister can be fine catch foam liquid, realizes better separation effect.

In this embodiment, taking the example of filling the refrigeration module with a multi-component mixed refrigerant (for example, 20% of ethylene, 25% of ethane, 40% of propane, and 15% of isobutane), the refrigeration module in embodiment 3 can cool the furnace core from ambient temperature (20 ℃) to-80 ℃ within 55 minutes.

The embodiment adds the change of the refrigerant in the gas-liquid separator on the basis of the working principle of the dry body temperature calibrator in the embodiment 2: the refrigerant gas-liquid two-phase flow at the inlet of the gas-liquid separator 9 is separated into liquid mainly comprising high boiling point (large molecular weight and capable of realizing refrigeration in a higher temperature region) and gas mainly comprising low boiling point (small molecular weight and capable of realizing refrigeration in a lower temperature region) in the gas-liquid separator 9, and the liquid flows out of the liquid phase outlet of the gas-liquid separator 9 to the secondary throttling element 18 and then returns to the air suction port of the compressor after being provided with cold energy (refrigeration in a higher temperature region) in the higher temperature region; the gas flows out from the gas-phase outlet of the gas-liquid separator 9, and is further cooled in the regenerative heat exchanger 8 through heat exchange, and then, the cold energy is provided at a lower temperature section (refrigeration at a lower temperature section). The gas-liquid separator 9 can reduce unnecessary flow of high-boiling-point components, reduce flow resistance, remarkably improve system efficiency, increase refrigerating capacity when improving refrigerating efficiency, and further enable cooling to be faster. In addition, the arrangement is also beneficial to the lubricating oil of the compressor (the lubricating oil of the compressor participates in circulation with the refrigerant) in the gas-liquid separator 9 to be separated in advance and returns to the inlet end of the compressor along with the liquid, so that the blocking fault of the lubricating oil in the low-temperature section is reduced.

Example 4

The dry body temperature calibrator provided in this embodiment is substantially the same as that described in embodiment 3, and as shown in fig. 4, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensing radiator 6, a throttling element 7, a regenerative heat exchanger 8, a shell-and-tube gas-liquid separator 9' and an evaporation tubule 16. The difference from example 3 is that a shell-and-tube gas-liquid separator 9' is used in place of the gas-liquid separator 9 of example 3. In this embodiment, the shell-and-tube gas-liquid separator 9' is a multifunctional gas-liquid separator integrated with heat exchange function, and the structure of the shell-and-tube gas-liquid separator is based on a vertically placed shell-and-tube heat exchanger, and includes a shell, a heat transfer tube bundle, a tube plate, a baffle plate (baffle), a tube box and other components. The shell is cylindrical, a heat transfer tube bundle is arranged in the shell, and two ends of the heat transfer tube bundle are fixed on the tube plate. A cold fluid and a hot fluid (refrigerant) which carry out heat exchange, wherein one fluid flows in the tube and is called tube side fluid (cryogenic fluid in the example); and the other flows outside the tubes and is called shell-side fluid (high-temperature fluid in this case). A tube side inlet 91 at the upper end of a heat transfer tube bundle of the shell-and-tube heat exchanger is connected with a cold medium outlet 84 (combined with figure 2) of the regenerative heat exchanger 8 through a tube fitting, a tube side outlet 92 at the lower end of the heat transfer tube bundle is connected with an inlet of the micro compressor 4 through a tube fitting, a shell side inlet 93 of the shell is connected with an outlet of the micro condensing radiator 6 through a tube fitting, a gas phase outlet 94 at the upper part of the shell is connected with a hot medium inlet 81 of the regenerative heat exchanger 8 through a tube fitting, and a liquid phase outlet 95 at the lower part of the shell is connected to the secondary throttling element 18 and then is connected to a cold medium loop of the regenerative heat exchanger 8 through a tube fitting.

In order to improve the heat transfer coefficient of fluid outside the tube, a plurality of baffles are arranged in the shell of the shell-and-tube heat exchanger. The baffles can increase the velocity of the shell-side fluid, force the fluid to pass through the tube bundle transversely for a plurality of times according to a specified route, and enhance the degree of fluid turbulence. The shell of the shell-and-tube gas-liquid separator 9' is internally provided with a return baffle in a shell pass fluid flowing area, so that gas-liquid two-phase flow in a shell pass can return and flow in the shell pass, the flowing speed of the shell pass fluid is improved, the shell pass fluid transversely washes the tube bundle for multiple times according to the designed route, the heat exchange can be further enhanced, and the gas-liquid separation efficiency is improved.

The present embodiment provides for charging a refrigeration module with a multi-component mixed refrigerant, such as: methane (15%), ethane (35%), propane (35%), isobutane (15%), and the refrigeration module of example 4 allowed the core to cool from ambient temperature (20 ℃) to-100 ℃ in 65 minutes.

In this embodiment, the shell-and-tube gas-liquid separator 9' has good heat exchange function, more ideal gas-liquid separation efficiency and more ideal lubricating oil separation efficiency under the occupation of limited space, and its principle lies in that the gas-liquid two-phase flow of the shell pass inlet of the gas-liquid separator 9 has a widely existing cold pipe wall surface (the pipe of the pipe pass has a low-temperature refrigerant to flow) in the flowing space of the shell pass, and the "cold trapping effect" of the cold wall surface will promote the gas-liquid separation efficiency and bring three benefits: firstly, the cold and hot media exchange heat well, the heat load of the regenerative heat exchanger is reduced, and the system efficiency is improved; secondly, the gas-liquid separation effect is more ideal, and the refrigeration cycle stability is better; thirdly, the lubricating oil of the compressor is further promoted to settle into the liquid and flow back to the inlet of the compressor, so that the risk of oil blockage in the low-temperature region is reduced, for example, under the condition of using the same refrigerant, the pipeline can be blocked by oil when the gas-liquid separator 9 in the embodiment 3 is used and cooled to-100 ℃, and the medium in the pipeline flows normally when the shell-and-tube gas-liquid separator 9' in the embodiment is used and cooled to-100 ℃, so that the oil blockage phenomenon does not occur.

Example 5

The dry body temperature calibrator provided in this embodiment is an improvement based on embodiment 3, and as shown in fig. 5, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensing radiator 6, a throttling element 7, a regenerative heat exchanger 8, a gas-liquid separator 9, a preceding stage heat exchanger 10 and an evaporation thin tube 16. Different from the embodiment 3, a front-stage heat exchanger 10 is added, the outlet of the micro-compressor 4 is connected with the inlet of the micro-condensation radiator 6, the outlet of the micro-condensation radiator 6 is connected with the heat medium inlet of the front-stage heat exchanger 10, the heat medium outlet of the front-stage heat exchanger 10 is connected with the inlet of the gas-liquid separator 9, the gas-phase outlet (located above in fig. 5) of the gas-liquid separator 9 is connected with the heat medium inlet of the regenerative heat exchanger 8, the heat medium outlet of the regenerative heat exchanger 8 is connected with the inlet of the throttling element 7, the outlet of the throttling element 7 is connected with the inlet of the evaporation tubule 16, the outlet of the evaporation tubule 16 is connected with the cold medium inlet of the regenerative heat exchanger 8, the cold medium outlet of the regenerative heat exchanger 8 is connected with the cold medium inlet of the front-stage heat exchanger 10, the cold medium outlet of the front-stage heat exchanger 10 is connected with the inlet of the micro-compressor 4, thereby forming a closed vapor compression refrigeration cycle. As in embodiment 3, the liquid phase outlet of the gas-liquid separator 9 (shown in fig. 5 below) is connected to the cooling medium circuit of the recuperator 8 through a secondary throttling element 18.

The pre-heat exchanger 10 is a double pipe heat exchanger, an aluminum plate-fin heat exchanger, or a microchannel heat exchanger.

In this embodiment, a pre-heat exchanger 10 is added in the circulation flow of the refrigeration module 2, and the refrigerant at the outlet of the micro-miniature condensing radiator 6 and the refrigerant at the outlet of the low-temperature fluid from the regenerative heat exchanger 8 are respectively used as hot fluid and cold fluid to exchange heat in the pre-heat exchanger 10.

In this embodiment, taking the example of filling the refrigeration module with multi-component mixed refrigerant (for example: 10% of methane, 30% of ethane, 30% of propane, 20% of isobutane and 10% of isopentane), the refrigeration module of embodiment 5 can cool the furnace core from ambient temperature (20 ℃) to-105 ℃ within 60 minutes.

In this embodiment, the gas-liquid two-phase refrigerant that has passed through the preceding heat exchanger 10 and then enters the gas-liquid separator 9 has a lower temperature, and the separation point and the separation component of the two-phase flow can be adjusted by adjusting the heat exchange area of the preceding heat exchanger 10 and the component ratio of the multi-component mixed refrigerant, thereby further realizing the adjustment of the refrigeration temperature. In addition, through the arrangement, the temperature of the refrigerant at the inlet of the micro compressor 4 is higher, and the frosting and condensation of the return pipe can be avoided.

As a supplementary example of adding the front heat exchanger 10, the front heat exchanger 10 may be added to the embodiments 1 and 2, in which case, the outlet of the micro-miniature condensation radiator 6 is connected to the heat medium inlet of the front heat exchanger 10, the heat medium outlet of the front heat exchanger 10 is connected to the pipeline communicating the inlet of the evaporation tubule 16, for example, connected to the throttling element 7, and the cold medium inlet of the front heat exchanger (10) is connected to the pipeline communicating the outlet of the evaporation tubule 16, for example, connected to the inlet of the micro-miniature compressor 4. The function of the recuperator 10 in this supplementary example is the same as that described above and will not be described again.

Example 6

The dry body temperature calibrator provided in this embodiment is an improvement based on embodiment 1, and as shown in fig. 6, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module 2 is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7, an oil separator 5 and an evaporation tubule 16. The difference from the embodiment 1 is that an oil separator 5 is added, the outlet of the micro compressor 4 is connected with the inlet of the oil separator 5, the working medium outlet 51 (fig. 6 is positioned at the upper part) of the oil separator 5 is connected with the inlet of the micro condensation radiator 6, the oil outlet 52 (fig. 6 is positioned at the lower part) of the oil separator 5 is connected with the inlet of the micro compressor 4, the outlet of the micro condensation radiator 6 is connected with the inlet of the throttling element 7, the outlet of the throttling element 7 is connected with the inlet end of the evaporation tubule 16, and the outlet end of the evaporation tubule 16 is connected with the inlet of the micro compressor 4, thereby forming a closed vapor compression refrigeration cycle.

In this embodiment, the refrigeration module of example 6 is filled with a multi-component mixed refrigerant (e.g., 5% methane, 20% ethylene, 30% ethane, 30% propane, 5% isobutane, 10% isopentane), and the core of the furnace can be cooled from ambient temperature to-105 ℃ within 55 minutes.

In this embodiment, the refrigeration module of embodiment 6 can cool the furnace core from the ambient temperature (20 ℃) to-45 ℃ within 30 minutes by taking the example of filling the conventional refrigerant R404a into the refrigeration module, which is more effective than that of embodiment 1.

In the embodiment, an oil separator 5 is added in the circulation flow of the refrigeration module for pre-separating the lubricating oil of the compressor, and is arranged on an inlet pipeline from an outlet of the micro compressor 4 to the micro condensation radiator 6, and an oil discharge outlet of the oil separator 5 is connected to an inlet of the micro compressor 4. The lubricating oil of the compressor can better return to the compressor in time through the oil discharge outlet of the oil separator 5, so that the lubrication of the compressor is facilitated, and the risk of oil blockage of a refrigeration cycle return circuit is reduced.

An oil separator 5 can be added on the basis of the embodiments 2, 3, 4 and 5, and the connection mode and the function are the same as those described above, and are not described again.

Example 7

The dry body temperature calibrator provided in this embodiment is an improvement based on embodiment 1, and as shown in fig. 7, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module 2 is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7, a refrigerant storage tank 11, a refrigerant tank inlet valve 12, a refrigerant tank outlet valve 13 and an evaporation thin tube 16.

The difference between this embodiment and embodiment 1 is that a refrigerant storage tank 11 and a control valve are added in the circulation flow of the refrigeration module, the refrigerant storage tank 11 is provided with two inlets and outlets, one inlet and outlet is connected to the outlet of the micro compressor 4 through a refrigerant inlet valve 12, and the other inlet and outlet is connected to the inlet of the micro compressor 4 through a refrigerant outlet valve 13. The refrigerant storage tank 11 can provide a more desirable refrigerant cycle pressure and refrigerant cycle capacity for the refrigeration system. When the pressure of the refrigeration system is higher than the expected value, a refrigerant inlet valve 12 from the outlet of the micro compressor 4 to the refrigerant storage tank 11 can be opened to enable the refrigerant to enter the storage tank 11, so that the pressure of the refrigeration cycle system is reduced; when the pressure of the refrigeration system is lower than the expected value, a refrigerant outlet tank valve 13 between the inlet of the micro compressor 4 and the refrigerant storage tank 11 can be opened, the refrigerant leaves the storage tank 11 to enter the refrigeration cycle, and the pressure of the refrigeration cycle is increased. In addition, when the system is stopped, in order to avoid the internal pressure of the refrigeration cycle system from being too high due to liquid phase evaporation, the refrigerant can be discharged into the refrigerant storage tank 11 through the refrigerant inlet tank valve 12, the pressure is reduced to protect the system, and the refrigerant is supplemented back to the refrigeration cycle system through the refrigerant outlet tank valve 13 according to the requirement when the system is started and operated next time.

In this embodiment, as an example of filling the conventional refrigerant R404a into the refrigeration module, the refrigeration module in embodiment 7 can cool the furnace core from the ambient temperature (20 ℃) to-45 ℃ within 25 minutes, and because the pressure of the refrigeration system can be precisely controlled, the cooling efficiency is higher and the cooling effect is better than that in embodiment 1.

On the basis of the embodiments 2, 3 and 4, the refrigerant storage tank 11, the refrigerant inlet valve 12 and the refrigerant outlet valve 13 can be added, and the connection mode and the function are the same as those described above, and are not described again.

Example 8

The dry body temperature calibrator provided in this embodiment is an improvement based on embodiment 1, and as shown in fig. 8, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7, an evaporation tubule 16 and a refrigerant circulation tank 19. The outlet of the micro compressor 4 is connected with the inlet of the micro condensation radiator 6, the outlet of the micro condensation radiator 6 is connected with the inlet of the throttling element 7, the outlet of the throttling element 7 is connected with the inlet end of the evaporation tubule 16, the outlet end of the evaporation tubule 16 is connected with the inlet of the refrigerant circulating tank 19, the outlet of the refrigerant circulating tank 19 is connected with the inlet of the micro compressor 4, and therefore a closed vapor compression refrigeration cycle is formed.

The difference between this embodiment and embodiment 1 is that a refrigerant circulation tank 19 is added in the circulation flow of the refrigeration module and is arranged on the front pipe line of the inlet of the micro compressor 4, and the refrigerant in the circulation system flows into the tank body from the inlet of the refrigerant circulation tank 19, and then flows out from the outlet of the refrigerant circulation tank 19 to the inlet of the micro compressor 4. The refrigerant circulation tank 19 has a function of storing the refrigerant, and can prevent the change of the composition of the circulating refrigerant caused by the change of the composition of the stored working medium. In the present embodiment, the refrigerant in the refrigerant circulation tank 19 always participates in the circulation flow, and therefore, it is possible to ensure that the concentration of each component of the refrigerant circulating in the system is maintained stable. The rest of the same contents as those in embodiment 1 will not be described again.

In this embodiment, the refrigeration module is filled with the conventional refrigerant R404a, and the refrigeration module in embodiment 8 can cool the furnace core from the ambient temperature (20 ℃) to-45 ℃ within 27 minutes, which has higher cooling efficiency and better cooling effect than embodiment 1.

In addition to the embodiments 2, 3, 4, 5, 6 and 7, the refrigerant circulation tank 19 may be added in the same manner as described above, that is, the refrigerant circulation tank 19 may be provided in the front inlet pipe of the micro compressor 4, the inlet of the refrigerant circulation tank 19 may communicate with the outlet of the evaporation capillary tube 16, and the outlet of the refrigerant circulation tank 19 may be connected to the inlet of the micro compressor 4. The function of the refrigerant circulation tank 19 is the same as that described above, and will not be described in detail.

Example 9

The dry body temperature calibrator provided in this embodiment is a modification based on embodiment 6, and as shown in fig. 9, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, an oil separator 5, a micro condensation radiator 6, a throttling element 7, a refrigerant storage tank 11, a refrigerant tank inlet valve 12, a refrigerant tank outlet valve 13 and an evaporation thin tube 16. The difference from embodiment 6 is that a refrigerant storage tank 11 and a control valve are added, and the operation of the refrigerant storage tank 11 and the control valve is the same as that of embodiment 7:

the refrigerant storage tank 11 is provided with two inlets and outlets, one inlet and outlet is connected to a working medium outlet (shown as the upper part in figure 9) of the oil separator 5 through a refrigerant inlet tank valve 12, and the other inlet and outlet is connected to an inlet of the micro compressor 4 through a refrigerant outlet tank valve 13. The refrigerant storage tank 11 can provide a more desirable refrigerant cycle pressure and refrigerant cycle capacity for the refrigeration system. When the pressure of the refrigeration system is higher than the expected value, a refrigerant inlet tank valve 12 from a working medium outlet of the oil separator 5 to the refrigerant storage tank 11 can be opened to enable the refrigerant to enter the storage tank 11, so that the pressure of the refrigeration cycle system is reduced; when the pressure of the refrigeration system is lower than the expected value, a refrigerant outlet tank valve 13 between the refrigerant storage tank 11 and the inlet of the micro compressor 4 can be opened, the refrigerant leaves the storage tank 11 to enter the refrigeration cycle, and the pressure of the refrigeration cycle is increased. In addition, when the system is stopped, in order to avoid the internal pressure of the refrigeration cycle system from being too high due to liquid phase evaporation, the refrigerant can be discharged into the refrigerant storage tank 11 through the refrigerant inlet tank valve 12, the pressure is reduced to protect the system, and the refrigerant is supplemented back to the refrigeration cycle system through the refrigerant outlet tank valve 13 according to the requirement when the system is started and operated next time. The rest of the same contents as those in embodiment 6 will not be described again.

In this embodiment, taking the example of charging the conventional refrigerant R404a into the refrigeration module, the refrigeration module of embodiment 9 can cool the furnace core from the ambient temperature (20 ℃) to-45 ℃ within 24 minutes, which is more efficient than that of embodiment 1.

In addition to example 9, a refrigerant circulation tank 19 similar to that of example 8 may be added, and the connection may be made in the same manner as in example 8, that is, the refrigerant circulation tank 19 may be provided in the pipe line in front of the inlet of the micro compressor 4, the inlet of the refrigerant circulation tank 19 may communicate with the pipe line in which the outlet of the evaporation capillary tube 16 is located, and the outlet of the refrigerant circulation tank 19 may be connected to the inlet of the micro compressor 4. The operation of the refrigerant circulation tank 19 is the same as that in embodiment 8, and will not be described in detail.

Example 10

The dry body temperature calibrator provided in this embodiment is a modification based on embodiment 5, and as shown in fig. 10, a furnace core 3 and a refrigeration module are provided inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle and comprises a micro compressor 4, a micro condensing radiator 6, a throttling element 7, a regenerative heat exchanger 8, a gas-liquid separator 9, a front-stage heat exchanger 10, an evaporation thin tube 16, a refrigerant storage tank 11, a refrigerant tank inlet valve 12 and a refrigerant tank outlet valve 13. A difference from embodiment 5 is that a refrigerant receiver 11 and a control valve are added, and the operation of the refrigerant receiver 11 and the control valve is the same as that of embodiment 7:

the refrigerant storage tank 11 is provided with two inlets and outlets, one inlet and outlet is connected to the outlet of the micro compressor 4 through a refrigerant inlet tank valve 12, and the other inlet and outlet is connected to the inlet of the micro compressor 4 through a refrigerant outlet tank valve 13. The refrigerant storage tank 11 can provide a more desirable refrigerant cycle pressure and refrigerant cycle capacity for the refrigeration system. When the pressure of the refrigeration system is higher than the expected value, a refrigerant inlet valve 12 from the outlet of the micro compressor 4 to the refrigerant storage tank 11 can be opened to enable the refrigerant to enter the storage tank 11, so that the pressure of the refrigeration cycle system is reduced; when the pressure of the refrigeration system is lower than the expected value, a refrigerant outlet tank valve 13 between the refrigerant storage tank 11 and the inlet of the micro compressor 4 can be opened, the refrigerant leaves the storage tank 11 to enter the refrigeration cycle, and the pressure of the refrigeration cycle is increased. In addition, when the system is stopped, in order to avoid the internal pressure of the refrigeration cycle system from being too high due to liquid phase evaporation, the refrigerant can be discharged into the refrigerant storage tank 11 through the refrigerant inlet tank valve 12, the pressure is reduced to protect the system, and the refrigerant is supplemented back to the refrigeration cycle system through the refrigerant outlet tank valve 13 according to the requirement when the system is started and operated next time. The rest of the same contents as those in embodiment 5 will not be described again.

In this embodiment, by filling a multi-component mixed refrigerant (for example, 10% of methane, 30% of ethane, 30% of propane, 20% of isobutane, and 10% of isopentane) into the refrigeration module, the refrigeration module in embodiment 10 can reduce the temperature of the furnace core from ambient temperature (20 ℃) to-105 ℃ within 55 minutes, and the cooling efficiency is higher than that in embodiment 5.

In addition to example 10, a refrigerant circulation tank 19 similar to that of example 8 may be added, and the connection method is the same as that of example 8, that is, the refrigerant circulation tank 19 is provided in the pipe line in front of the inlet of the micro compressor 4, the inlet of the refrigerant circulation tank 19 communicates with the pipe line in which the outlet of the evaporation capillary tube 16 is located, and the outlet of the refrigerant circulation tank 19 is connected to the inlet of the micro compressor 4. The operation of the refrigerant circulation tank 19 is the same as that in embodiment 8, and will not be described in detail.

Example 11

The dry body temperature calibrator provided by the embodiment comprises a frame shell (see fig. 1), and further comprises a furnace core 3 and a refrigeration module which are arranged inside. The refrigeration module is constructed by adopting a vapor compression refrigeration cycle and a pump-drive cold carrying cycle, and as shown in fig. 11, comprises a micro compressor 4, a micro condensation radiator 6, a throttling element 7, a cold carrying pump 14, a cold carrying heat exchanger 15 and a cold carrying tubule 17, and forms two units of the refrigeration cycle and the cold carrying cycle. In the refrigeration cycle unit, the outlet of the miniature compressor 4 is connected with the inlet pipeline of the miniature condensing radiator 6, the outlet of the miniature condensing radiator 6 is connected with the inlet pipeline of the throttling element 7, the outlet pipeline of the throttling element 7 is connected with the cold medium inlet 151 (positioned on the upper left side in fig. 11) of the cold-carrying heat exchanger 15, the cold medium outlet 152 (positioned on the lower left side in fig. 11) of the cold-carrying heat exchanger 15 is connected with the inlet pipeline of the miniature compressor 4, and the pipeline of the refrigeration cycle unit is filled with refrigerant, thereby forming a closed vapor compression refrigeration cycle. In the cold-carrying circulation unit, a hot medium outlet 154 (positioned at the upper right side in fig. 11) of the cold-carrying heat exchanger 15 is connected with an inlet pipeline of the cold-carrying pump 14, an outlet of the cold-carrying pump 14 is connected with an inlet pipeline of the cold-carrying tubule 17, an outlet pipeline of the cold-carrying tubule 17 is connected with a hot medium inlet 153 (positioned at the lower right side in fig. 11) of the cold-carrying heat exchanger 15, and a refrigerant liquid medium is filled in a pipeline of the cold-carrying circulation unit, so that a closed pump-driving cold-carrying circulation is formed. The furnace core 3 is a deep groove type structure and is made of heat-conducting materials, the groove body is arranged inside the frame shell, and the cold-carrying slim tube 17 is wound on the outer surface of the furnace core 3. As in embodiment 1, the micro-miniature condensing heat sink 6 is mounted on the frame case to be in contact with the outside air, and its own fan can bring heat to the outside of the calibration instrument.

The refrigeration module of the embodiment comprises two parts, namely a refrigeration cycle and a cold-carrying cycle, wherein the refrigeration cycle and the cold-carrying cycle are connected in series through the cold-carrying heat exchanger 15, compared with the embodiment 1, a cold-carrying circulation unit (including but not limited to a cold-carrying pump 14, a cold-carrying heat exchanger 15 and a cold-carrying tubule 17) is additionally arranged, the function of the original evaporation tubule 16 in the refrigeration cycle in the embodiment 1 is replaced by the cold-carrying heat exchanger 15 in the embodiment, the inlet and the outlet of the cold-carrying heat exchanger 15 low-temperature fluid (cold medium, namely refrigerant) are equivalently connected to the inlet and the outlet of the original evaporation tubule 16 respectively, the outlet of the cold-carrying heat exchanger 15 high-temperature fluid (hot medium) is connected with the inlet of the cold-carrying pump 14, the outlet of the cold-carrying pump 14 is connected with the cold-carrying tubule 17, the other end of the cold-carrying tubule 17 is connected to the inlet of the cold-carrying heat exchanger 15 high-temperature fluid (hot medium), and the outer wall surface of the cold-carrying tubule 17 is in close contact with part of the surface of the furnace core 3.

In this embodiment, the cold carrying pump 14 may use a low temperature resistant liquid gear pump, a piston pump or other types of liquid pumps, the cold carrying heat exchanger 15 may use a low temperature resistant plate heat exchanger, a plate fin heat exchanger, a double pipe heat exchanger, a shell-and-tube heat exchanger or other types of low temperature resistant heat exchangers, and the cold carrying tubule 17 may use a copper tube, a stainless steel tube, an aluminum alloy tube or other metal tube.

The working principle of the embodiment is as follows: refrigerant (cold medium) is filled in a refrigeration cycle pipeline of the refrigeration module, and after being compressed into high-pressure gas by the microminiature compressor 4, the refrigerant is discharged to the microminiature condensation radiator 6 from an outlet; the refrigerant releases heat in the micro condensation radiator 6, the heat is discharged to the air around the dry body temperature calibrator (the heat is brought to the outside of the calibrator by the air blown by the fan), the refrigerant is converted from a high-pressure gas state into a high-pressure liquid state after passing through the micro condensation radiator 6, enters the throttling element 7, becomes a low-pressure and low-temperature gas-liquid two-phase flow after being throttled, then enters the cold medium inlet 151 of the cold-carrying heat exchanger 15 through the connecting pipe from the outlet of the throttling element 7, the low-pressure and low-temperature refrigerant continuously absorbs the heat from the hot medium (cold-carrying medium) of the cold-carrying heat exchanger 15 in the cold-carrying heat exchanger 15 and is evaporated and gasified, finally becomes low-pressure refrigerant gas, flows out from the cold medium outlet 152 of the cold-carrying heat exchanger 15 and returns to the inlet of the micro compressor 4, and a refrigeration cycle is completed. The cold-carrying circulation pipeline of the refrigeration module is filled with cold-carrying agent (thermal medium), the cold-carrying pump 14 drives the cold-carrying agent to flow from the outlet of the cold-carrying pump 14 to the inlet of the cold-carrying tubule 17, the cold-carrying agent absorbs heat in the cold-carrying tubule 17 to increase the temperature, then the cold-carrying agent flows from the outlet of the cold-carrying tubule 17 to the thermal medium inlet 153 of the cold-carrying heat exchanger 15, the cold-carrying heat exchanger 15 absorbs heat by the cold medium (refrigerant) from the cold-carrying heat exchanger 15, the cold-carrying agent releases heat in the cold-carrying heat exchanger 15, the temperature of the cold-carrying agent is reduced, the cold-carrying agent flows out from the thermal medium outlet 154 of the cold-carrying heat exchanger 15 and returns to the inlet of the cold-carrying pump 14 through the pipeline, and a cold-carrying cycle is completed. The secondary refrigerant absorbs the heat of the furnace core 3 in the secondary cooling tubules 17, so that the temperature of the furnace core 3 can be reduced, and a cooling or low-temperature environment is provided for metering and calibrating the temperature.

In this embodiment, the refrigerant can not be carried to 3 positions of wick, and the cold circulation of year that increases can be fine keeps apart refrigeration cycle and wick, and the benefit of bringing lies in: firstly, when the temperature of the furnace core is high, the refrigeration cycle unit can be directly started to operate without high-temperature impact; secondly, the heat exchange is violent in the evaporation process of the refrigerant, the two-phase flow fluctuates, and the cold carrying medium (cold carrying medium) keeps a single-phase flow state, so that the cold supply of the furnace core 3 can be maintained in a stable state, and the stability and the uniformity of a temperature field of the furnace core 3 are facilitated.

In this embodiment, as the refrigeration cycle pipeline is filled with the multi-component mixed refrigerant (for example, 10% of methane, 30% of ethane, 30% of propane, 20% of isobutane and 10% of isopentane), and the cold-carrying cycle pipeline is filled with liquid isobutane, the refrigeration cycle unit in embodiment 11 can cool the secondary refrigerant from the ambient temperature (20 ℃) to-105 ℃ through the cold-carrying heat exchanger within 70 minutes, the cold-carrying cycle is synchronously operated, and the secondary refrigerant cools the furnace core from the ambient temperature (20 ℃) to-100 ℃ within 70 minutes.

As a supplement to embodiment 11, an oil separator 5 (see fig. 6) can be added to the refrigeration cycle unit, in which case the outlet of the micro compressor 4 is connected to the inlet of the oil separator 5, the working medium outlet 51 of the oil separator 5 is connected to the inlet of the micro condensing radiator 6, and the oil outlet 52 of the oil separator 5 is connected to the inlet of the micro compressor 4. The function of the oil separator 5 is the same as that described in example 6, and will not be described again.

As another supplement to the embodiment 11, a refrigerant storage tank 11 (see fig. 7) may be added to the refrigeration cycle unit, the refrigerant storage tank 11 is provided with two inlets and outlets, one inlet and outlet is connected to the outlet of the micro compressor 4 through a refrigerant inlet valve 12, and the other inlet and outlet is connected to the inlet of the micro compressor 4 through a refrigerant outlet valve 13. The function of the refrigerant storage tank 11 is the same as that described in embodiment 7, and its description is omitted.

As another supplement to embodiment 11, a refrigerant circulation tank 19 (see fig. 8) may be added to the refrigeration cycle unit, the refrigerant circulation tank 19 is disposed on the inlet front pipe of the micro compressor 4, the inlet of the refrigerant storage tank 19 is connected to the cold medium outlet 152 of the cold-carrying heat exchanger 15, and the outlet of the refrigerant circulation tank 19 is connected to the inlet of the micro compressor 4. The function of the refrigerant circulation tank 19 is the same as that described in embodiment 8, and its description will be omitted.

Example 12

Set up heating components and parts in the stove core 3 of any kind of dry body temperature check gauge that embodiment 1 to embodiment 11 provided, through control heating components and parts input electricity work, the cooling control to the stove core of cooperation refrigeration module realizes the accurate control of stove core temperature and keeps the temperature stable.

The heating element is an electric heating rod and is inserted into a hole arranged in the furnace core 3; or the heating element is an electric heating wire, and the evaporation tubule 16 or the cold carrying tubule 17 is wound on the outer surface of the furnace core 3 in a staggered manner; or the heating component is an electric heating sheet, and the positions of the evaporation tubule 16 or the cold carrying tubule 17 are staggered and attached on the outer surface of the furnace core 3.

Example 12 the temperature fluctuation in the furnace core 3 can be controlled within the range of. + -. 0.02 ℃. By matching the refrigeration module of example 10, the temperature of the core was reduced from ambient to-105 ℃ in 55 minutes.

Example 13

Any one of the dry body temperature check meters provided in embodiments 1 to 11 has a liquid holding space provided in the furnace core 3, and the liquid holding space is filled with liquid and used as a small-sized, portable liquid thermostatic bath.

The liquid containing space in the furnace core 3 is cylindrical or square column-shaped; the filled liquid is water, antifreeze, silicon oil or alcohol.

Example 13 design of liquid thermostat, combined with the design of the refrigeration module of example 10, can maintain the temperature fluctuation of the liquid in the furnace core 3 within a range of + -0.01 deg.C within 10 minutes at an operating temperature range of-100 deg.C to 150 deg.C.

Comparison of temperature drop

For the same furnace core, the vapor compression type refrigeration mode and the Stirling refrigeration mode are used for temperature reduction comparison, and the temperature reduction curve is shown in figure 12 (wherein the refrigeration mode of the invention takes the embodiment 10 as an example). The Stirling refrigeration technology limits that the starting can be carried out only when the temperature of the furnace core is naturally cooled to be lower than 50 ℃ (otherwise, the furnace core is damaged at high temperature), and the refrigerating mode can be used for starting at any time within 150 ℃; on the other hand, the temperature of the furnace core can be reduced from 150 ℃ to-105 ℃ in 100 minutes by the refrigeration mode of the invention, while the refrigeration mode of the Stirling requires 180 minutes, and the temperature is reduced from 50 ℃ to-100 ℃ by the refrigeration mode of the invention only requires 60 minutes, while the refrigeration mode of the Stirling requires 100 minutes. It can be seen that the refrigeration mode of the invention is far superior to the existing common Stirling refrigeration mode in the aspects of temperature reduction starting point and temperature reduction efficiency. Other embodiments have the same characteristics, and the cooling data are given in each embodiment and are not shown.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the content of the present invention.