阅读说明：本技术 一种极高极低温度控制系统 (Extremely high extremely low temperature control system ) 是由 金鑫 顾佳星 王光光 于 2021-02-03 设计创作，主要内容包括：本发明涉及温度控制技术领域,提供一种极高极低温度控制系统,旨在解决现有温控系统无法实现极高极低温度控温以及能耗大、稳定性差的问题,包括微电脑处理器、厂务冷却水系统、冷媒制冷系统和循环液系统；所述厂务冷却水系统包括厂务水管路和依次设置在厂务水管路上的厂务水过滤器和冷却电磁阀,厂务水管路上还贯通安装有厂务水支路,且厂务水支路上安装有控温电磁阀；所述冷媒制冷系统包括制冷管路和依次安装在制冷管路上的压缩机、冷凝器、高压传感器、冷媒过滤器、视液镜、主电子膨胀阀、蒸发器、气液分离器和低压传感器,制冷管路内设有冷媒。本发明尤其适用于极高极低温度的温控,具有较高的社会使用价值和应用前景。(The invention relates to the technical field of temperature control, and provides an extremely-high and extremely-low temperature control system, which aims to solve the problems that the existing temperature control system cannot realize extremely-high and extremely-low temperature control, and has large energy consumption and poor stability, and comprises a microcomputer processor, a plant cooling water system, a refrigerant refrigeration system and a circulating liquid system; the plant service cooling water system comprises a plant service water pipeline, a plant service water filter and a cooling electromagnetic valve which are sequentially arranged on the plant service water pipeline, a plant service water branch is further arranged on the plant service water pipeline in a penetrating mode, and a temperature control electromagnetic valve is arranged on the plant service water branch; the refrigerant refrigerating system comprises a refrigerating pipeline, and a compressor, a condenser, a high-pressure sensor, a refrigerant filter, a liquid viewing mirror, a main electronic expansion valve, an evaporator, a gas-liquid separator and a low-pressure sensor which are sequentially arranged on the refrigerating pipeline, wherein a refrigerant is arranged in the refrigerating pipeline. The invention is especially suitable for temperature control at extremely high and extremely low temperature, and has higher social use value and application prospect.)

1. An extremely-high and extremely-low temperature control system is characterized by comprising a microcomputer processor, a plant cooling water system, a refrigerant refrigerating system and a circulating liquid system;

the plant service cooling water system comprises a plant service water pipeline, a plant service water filter (1) and a cooling electromagnetic valve (3) which are sequentially arranged on the plant service water pipeline, a plant service water branch is further arranged on the plant service water pipeline in a penetrating mode, and a temperature control electromagnetic valve (2) is arranged on the plant service water branch;

the refrigerant refrigeration system comprises a refrigeration pipeline, and a compressor (5), a condenser (4), a high-pressure sensor (10), a refrigerant filter (11), a liquid viewing mirror (8), a main electronic expansion valve (7), an evaporator (21), a gas-liquid separator (12) and a low-pressure sensor (13) which are sequentially arranged on the refrigeration pipeline, wherein a refrigerant is arranged in the refrigeration pipeline;

the condenser (4) is also connected with a plant water pipeline and is used for exchanging heat between refrigerant vapor in the refrigeration pipeline and water in the plant water pipeline, the refrigerant vapor is converted into liquid, and the heat of the refrigerant and the plant water is transferred to the air; the compressor (5), the condenser (4), the evaporator (21) and the gas-liquid separator (12) are combined to construct a refrigerating system for circularly refrigerating a refrigerant in a refrigerating pipeline; the refrigerant filter (11) is used for filtering and purifying the refrigerant; the liquid viewing mirror (8) is used for determining the quality and the water content of a refrigerant in the refrigerant refrigeration system; the main electronic expansion valve (7) is used for adjusting the amount of refrigerant liquid supply in the refrigeration pipeline; the high-pressure sensor (10) and the low-pressure sensor (13) are combined to detect the pressure of the refrigerant in the refrigeration pipeline;

a refrigeration branch I and a refrigeration branch II are arranged on the refrigeration pipeline in a penetrating manner, the input end of the refrigeration branch I is positioned at the downstream of the compressor (5), the output end of the refrigeration branch I is positioned at the downstream of the main electronic expansion valve (7), and a hot gas electronic expansion valve (6) is arranged on the refrigeration branch I; the input end of the refrigeration branch II is positioned at the downstream of the liquid viewing mirror (8), the output end of the refrigeration branch II is positioned at the upstream of the gas-liquid separator (12), and a compressor cooling electronic expansion valve (9) is arranged on the refrigeration branch II;

the circulating liquid system comprises a circulating liquid pipeline, and a circulating liquid filter I (15), a flow meter (16), a three-way valve I (17), a plant cooling water heat exchanger (18), a three-way valve II (20), a water tank (23), a circulating liquid filter II (25), a water pump (26) and a temperature sensor (28) which are sequentially arranged on the circulating liquid pipeline, wherein target circulating fluid needing precise temperature control is arranged in the circulating liquid pipeline;

the circulating liquid filter I (15) and the circulating liquid filter II (25) are used for filtering and purifying target circulating fluid; the flow meter (16) is used for detecting the throughput of the target circulating fluid; the plant service cooling water heat exchanger (18) is also connected with a plant service water branch for carrying out heat exchange on the target circulating fluid and the plant service water, and the target circulating fluid takes away the cold energy of the plant service water; a heating wire (22) with the output frequency controlled by a microcomputer processor is arranged in the water tank (23); the water pump (26) is used for driving the target circulating fluid to circularly flow; the temperature sensor (28) is used for detecting the temperature of the target circulating fluid; the circulating liquid branch passes through the evaporator (21) and is used for exchanging heat between target circulating fluid and a refrigerant, and the target circulating fluid takes away the cold energy of the refrigerant;

and a circulating liquid branch I is arranged on a third interface of the three-way valve I (17), and the other end of the circulating liquid branch is communicated with a third interface of the three-way valve II (20).

2. An ultra-high ultra-low temperature control system as recited in claim 1, wherein: and a circulating liquid high-temperature sensor and a circulating liquid low-temperature sensor are arranged in the water tank (23) and are used for monitoring and protecting overhigh or overlow temperature of the target circulating liquid.

3. An ultra-high ultra-low temperature control system as recited in claim 1, wherein: and a liquid supplementing water tank (24) for supplementing the target circulating fluid is also arranged on the water tank (23).

4. An ultra-high ultra-low temperature control system as recited in claim 1, wherein: and a pressure gauge (27) is arranged on one section of the circulating liquid pipeline positioned at the downstream of the water pump (26) and used for measuring the pressure of the target circulating liquid in the circulating liquid pipeline.

5. An ultra-high ultra-low temperature control system as recited in claim 1, wherein: and a circulating liquid branch II is arranged on the circulating liquid pipeline in a run-through manner, the input end of the circulating liquid branch II is positioned at the downstream of the flowmeter (16), and a liquid discharge hand valve (14) is arranged on the circulating liquid branch II.

6. An ultra-high ultra-low temperature control system as recited in claim 1, wherein: and a circulating liquid branch III is arranged on the circulating liquid pipeline in a run-through manner, the input end and the output end of the circulating liquid branch III are respectively positioned at the downstream of the flowmeter (16) and the downstream of the pressure gauge (27), and a branch hand valve (19) is arranged on the circulating liquid branch III.

Technical Field

The invention relates to the technical field of precise temperature control, in particular to an extremely-high and extremely-low temperature control system.

Background

The prior art can realize precise temperature control, but the temperature control range has a narrow covering surface and has respective stable temperature control intervals.

The prior art 1 is a conventional compressor refrigeration system, the lowest temperature control point of which can reach-30 ℃ and the temperature control range of which is wide (30 ℃ to 90 ℃), but the following disadvantages exist: 1. energy is not saved, and when the temperature is controlled to be between 30 ℃ and 90 ℃, the compressors run synchronously, so that the electric quantity is wasted; 2. because the compressor synchronously operates when the temperature is controlled at + 60-90 ℃, the operating stability of the compressor can be influenced by overhigh temperature, the stability of the temperature control precision is poor, and the performance and the service life of the compressor are influenced by long-time high-temperature operation of the compressor; 3. in order to ensure that the compressor can stably operate when the temperature is controlled at the temperature of between 60 ℃ and 90 ℃, the frequency is reduced to operate when the compressor operates so as to ensure that the compressor cannot be overheated, but the synchronous reduction of the refrigerating capacity can be caused when the frequency of the compressor is reduced to operate, and finally the refrigerating capacity performance of the system can be caused when the system operates in the interval of between 60 ℃ and 90 ℃.

In the prior art 2, as shown in fig. 2, a microcomputer processing system analyzes and matches the output frequency of a temperature control system electromagnetic valve 1-2, so as to adjust the flow rate of plant cooling water and control the heat exchange amount required in a heat exchanger, and finally, the microcomputer processing system analyzes and matches the output power of a temperature control system heating wire 1-1 and performs fine adjustment, so that the temperature control precision reaches +/-0.1 ℃, and because the refrigerating capacity in the system depends on the heat exchange of plant cooling water and circulating liquid, the temperature of the plant cooling water in a pipeline is 18 +/-2 ℃, the temperature control range cannot reach below 30 ℃.

To this end, we propose an extremely high and very low temperature control system.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an extremely-high and extremely-low temperature control system, which overcomes the defects of the prior art, has reasonable design and compact structure and aims to solve the problems that the existing temperature control system cannot realize extremely-high and extremely-low temperature control, and has large energy consumption and poor stability.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

an extremely-high and extremely-low temperature control system comprises a microcomputer processor, a plant cooling water system, a refrigerant refrigerating system and a circulating liquid system;

the plant service cooling water system comprises a plant service water pipeline, a plant service water filter and a cooling electromagnetic valve which are sequentially arranged on the plant service water pipeline, a plant service water branch is further arranged on the plant service water pipeline in a penetrating mode, and a temperature control electromagnetic valve is arranged on the plant service water branch;

the refrigerant refrigerating system comprises a refrigerating pipeline, and a compressor, a condenser, a high-pressure sensor, a refrigerant filter, a liquid viewing mirror, a main electronic expansion valve, an evaporator, a gas-liquid separator and a low-pressure sensor which are sequentially arranged on the refrigerating pipeline, wherein a refrigerant is arranged in the refrigerating pipeline;

the condenser is also connected with a plant water pipeline and is used for exchanging heat between refrigerant vapor in the refrigeration pipeline and water in the plant water pipeline, the refrigerant vapor is converted into liquid, and the heat of the refrigerant and the plant water is transferred to the air; the compressor, the condenser, the evaporator and the gas-liquid separator are combined to construct a refrigerating system for circularly refrigerating a refrigerant in the refrigerating pipeline; the refrigerant filter is used for filtering and purifying the refrigerant; the liquid viewing mirror is used for determining the quality and the water content of a refrigerant in the refrigerant refrigeration system; the main electronic expansion valve is used for adjusting the liquid supply amount of a refrigerant in the refrigeration pipeline; the high-pressure sensor and the low-pressure sensor are combined and used for detecting the pressure of a refrigerant in the refrigeration pipeline;

a refrigeration branch I and a refrigeration branch II are arranged on the refrigeration pipeline in a penetrating manner, the input end of the refrigeration branch I is positioned at the downstream of the compressor, the output end of the refrigeration branch I is positioned at the downstream of the main electronic expansion valve, and a hot gas electronic expansion valve is arranged on the refrigeration branch I; the input end of the refrigeration branch II is positioned at the downstream of the liquid observation mirror, the output end of the refrigeration branch II is positioned at the upstream of the gas-liquid separator, and a compressor cooling electronic expansion valve is arranged on the refrigeration branch II;

the circulating liquid system comprises a circulating liquid pipeline, and a circulating liquid filter I, a flow meter, a three-way valve I, a plant cooling water heat exchanger, a three-way valve II, a water tank, a circulating liquid filter II, a water pump and a temperature sensor which are sequentially arranged on the circulating liquid pipeline, wherein target circulating fluid needing precise temperature control is arranged in the circulating liquid pipeline;

the circulating liquid filter I and the circulating liquid filter II are used for filtering and purifying target circulating fluid; the flow meter is used for detecting the throughput of the target circulating fluid; the plant cooling water heat exchanger is also connected with a plant water branch for carrying out heat exchange on the target circulating fluid and the plant water, and the target circulating fluid takes away the cold energy of the plant water; a heating wire for controlling the output frequency of the microcomputer processor is arranged in the water tank; the water pump is used for driving the target circulating fluid to circularly flow; the temperature sensor is used for detecting the temperature of the target circulating fluid; the circulating liquid branch passes through the evaporator and is used for exchanging heat between target circulating fluid and a refrigerant, and the target circulating fluid takes away cold energy of the refrigerant;

and a circulating liquid branch I is installed on a third interface of the three-way valve I, and the other end of the circulating liquid branch is communicated with a third interface of the three-way valve II.

Preferably, a circulating liquid high-temperature sensor and a circulating liquid low-temperature sensor are arranged in the water tank and used for monitoring and protecting overhigh or overlow temperature of the target circulating liquid.

Preferably, the water tank is also provided with a liquid supplementing water tank for supplementing the target circulating fluid.

Preferably, a section of the circulating liquid pipeline located at the downstream of the water pump is provided with a pressure gauge for measuring the pressure of the target circulating liquid in the circulating liquid pipeline.

Preferably, a circulation liquid branch II is arranged on the circulation liquid pipeline in a penetrating mode, the input end of the circulation liquid branch II is located at the downstream of the flow meter, and a liquid discharge hand valve is installed on the circulation liquid branch II.

Preferably, a circulation liquid branch III is arranged on the circulation liquid pipeline in a penetrating mode, the input end and the output end of the circulation liquid branch III are located at the downstream of the flow meter and the downstream of the pressure gauge respectively, and a branch hand valve is installed on the circulation liquid branch III.

(III) advantageous effects

The embodiment of the invention provides an extremely-high and extremely-low temperature control system, which has the following beneficial effects:

1. the invention switches the refrigeration by the set target temperature through temperature differentiation, has large temperature regulation range, realizes the control of extremely high and extremely low temperature, saves the energy consumption of the compressor, prolongs the service life of the compressor, and can avoid the condition that the refrigeration system is unstable due to overheating of the compressor.

2. The invention carries out heat exchange refrigeration through the plant cooling water, and the refrigerating capacity of the refrigerating system can be effectively increased or reduced by increasing or reducing the flow of the plant cooling water in a reasonable range, and the refrigerating capacity is large at high temperature.

3. The heating wire of the invention controls the output frequency by a microcomputer processor, and finely adjusts the temperature of the target circulating fluid, thereby achieving the precise temperature control of the temperature of the target circulating fluid.

Drawings

The foregoing features, technical features, advantages and implementations of an ultra-low temperature control system will be further described in the following detailed description of preferred embodiments in a clearly understandable manner, in conjunction with the accompanying drawings.

FIG. 1 is a diagram of a temperature control system of the present invention;

fig. 2 is a diagram of a prior art temperature control system.

In the figure: the system comprises a plant service water filter 1, a temperature control electromagnetic valve 2, a cooling electromagnetic valve 3, a condenser 4, a compressor 5, a hot gas electronic expansion valve 6, a main electronic expansion valve 7, a liquid viewing mirror 8, a compressor cooling electronic expansion valve 9, a high-pressure sensor 10, a refrigerant filter 11, a gas-liquid separator 12, a low-pressure sensor 13, a liquid discharge hand valve 14, a plant service water filter 15, a flow meter 16, a three-way valve I17, a plant service cooling water heat exchanger 18, a flow dividing hand valve 19, a three-way valve II 20, an evaporator 21, a heating wire 22, a water tank 23, a liquid supplementing water tank 24, a filter 25, a water pump 26, a pressure gauge.

Detailed Description

The invention will be further illustrated with reference to the accompanying figure 1 and examples:

example 1

An extremely-high and extremely-low temperature control system comprises a microcomputer processor, a plant cooling water system, a refrigerant refrigerating system and a circulating liquid system;

the plant cooling water system comprises a plant water pipeline, a plant water filter 1 and a cooling electromagnetic valve 3 which are sequentially arranged on the plant water pipeline, a plant water branch is further arranged on the plant water pipeline in a penetrating manner, and a temperature control electromagnetic valve 2 is arranged on the plant water branch;

the refrigerant refrigerating system comprises a refrigerating pipeline, and a compressor 5, a condenser 4, a high-pressure sensor 10, a refrigerant filter 11, a liquid viewing mirror 8, a main electronic expansion valve 7, an evaporator 21, a gas-liquid separator 12 and a low-pressure sensor 13 which are sequentially arranged on the refrigerating pipeline, wherein a refrigerant is arranged in the refrigerating pipeline;

the condenser 4 is also connected with a plant water pipeline and is used for exchanging heat between refrigerant vapor in the refrigeration pipeline and water in the plant water pipeline, the refrigerant vapor is converted into liquid, and the heat of the refrigerant and the plant water is transferred to the air; the compressor 5, the condenser 4, the evaporator 21 and the gas-liquid separator 12 are combined to construct a refrigerating system for circularly refrigerating a refrigerant in a refrigerating pipeline; the refrigerant filter 11 is used for filtering and purifying the refrigerant; the liquid viewing mirror 8 is used for determining the quality and the water content of a refrigerant in the refrigerant refrigeration system; the main electronic expansion valve 7 is used for adjusting the amount of refrigerant liquid supply in the refrigeration pipeline; the high-pressure sensor 10 and the low-pressure sensor 13 are combined to detect the pressure of the refrigerant in the refrigeration pipeline;

a refrigeration branch I and a refrigeration branch II are arranged on the refrigeration pipeline in a penetrating manner, the input end of the refrigeration branch I is positioned at the downstream of the compressor 5, the output end of the refrigeration branch I is positioned at the downstream of the main electronic expansion valve 7, and a hot gas electronic expansion valve 6 is arranged on the refrigeration branch I; the input end of the refrigeration branch II is positioned at the downstream of the liquid observation mirror 8, the output end of the refrigeration branch II is positioned at the upstream of the gas-liquid separator 12, and a compressor cooling electronic expansion valve 9 is arranged on the refrigeration branch II;

the circulating liquid system comprises a circulating liquid pipeline, and a circulating liquid filter I15, a flowmeter 16, a three-way valve I17, a plant cooling water heat exchanger 18, a three-way valve II 20, a water tank 23, a circulating liquid filter II 25, a water pump 26 and a temperature sensor 28 which are sequentially arranged on the circulating liquid pipeline, wherein target circulating fluid needing precise temperature control is arranged in the circulating liquid pipeline;

the circulating liquid filter I15 and the circulating liquid filter II 25 are used for filtering and purifying target circulating fluid; the flow meter 16 is used for detecting the throughput of the target circulating fluid; the plant cooling water heat exchanger 18 is also connected with a plant water branch for exchanging heat between the target circulating fluid and the plant water, and the target circulating fluid takes away the cold energy of the plant water; a heating wire 22 with the output frequency controlled by a microcomputer processor is arranged in the water tank 23 to finely adjust the temperature of the target circulating fluid, so that the precise temperature control of the temperature of the target circulating fluid is achieved; the water pump 26 is used for driving the target circulating fluid to circularly flow; the temperature sensor 28 is used for detecting the temperature of the target circulating fluid; the circulating liquid branch passes through the evaporator 21 and is used for exchanging heat between target circulating fluid and a refrigerant, and the target circulating fluid takes away cold energy of the refrigerant; a pressure gauge 27 is installed on a section of the circulating liquid pipeline located at the downstream of the water pump 26, and is used for measuring the pressure of the target circulating liquid in the circulating liquid pipeline.

A circulating liquid branch I is arranged on a third interface of the three-way valve I17, and the other end of the circulating liquid branch is communicated with a third interface of a three-way valve II 20;

in the embodiment, when the temperature set value SV is within the range of SV (the set target temperature) between +30 ℃ and less than 90 ℃, the microcomputer processor analyzes and matches the temperature control system and uses the factory cooling water to reduce the temperature. At this time:

s1, the pipeline from the flow meter 16 to the plant cooling water heat exchanger 18 is conducted through the three-way valve I17, and the pipeline from the flow meter 16 to the evaporator 21 is closed;

s2, the three-way valve II 20 conducts a pipeline from the plant cooling water heat exchanger 18 to the water tank 23, and other valves of the three-way valve II 20 are closed;

s3, stopping the operation of the compressor 5, and closing the cooling electromagnetic valve 3;

s4, when the circulating fluid flows through the plant cooling water heat exchanger 18, the circulating fluid temperature signal is collected by the temperature sensor 28, the microcomputer processor analyzes and matches the output frequency of the electromagnetic valve 2 in the temperature control system to adjust the flow rate of the plant cooling water, and further adjusts the heat exchange amount, the circulating fluid in the plant cooling water heat exchanger 18 exchanges heat with the plant cooling water, the circulating fluid takes away the cold energy of the plant cooling water, so that the temperature of the circulating fluid is reduced, the circulating fluid flows into the water tank 23 and then the microcomputer processor analyzes and matches the output frequency of the heating wire 22 of the temperature control system to finely adjust the temperature of the circulating fluid, and the accurate temperature control value of the target circulating fluid is +/-0.1 ℃.

In the embodiment, when the temperature set value SV is between-30 ℃ and SV (the set target temperature) is less than 30 ℃, the microcomputer processor analyzes and matches the temperature control system, and the refrigerant refrigeration system is used for cooling. At this time:

s1, the pipeline from the flowmeter 16 to the evaporator 21 is conducted through the three-way valve I17, and the pipeline flowing to the plant cooling water heat exchanger 18 is closed;

s2, the three-way valve II 20 conducts a pipeline from the evaporator 21 to the water tank 23, and other valves of the three-way valve II 20 are closed;

s3, the compressor 5 starts to operate, the electromagnetic valve 2 is closed, and the cooling electromagnetic valve 3 is opened;

s4, when the circulating fluid flows through the evaporator 21, after a temperature signal of the circulating fluid is collected by the temperature sensor 28, the microcomputer processor analyzes and matches the adjustment of the opening degrees of the hot gas electronic expansion valve 6 and the main electronic expansion valve 7 in the temperature control system and the adjustment of the running frequency of the compressor 5, so as to adjust the heat exchange quantity, the circulating fluid in the evaporator 21 exchanges heat with the refrigerant, and the circulating fluid takes away the cold energy of the refrigerant, so that the temperature of the circulating fluid is reduced; the output frequency of the heating wire 22 of the temperature control system is analyzed and matched by the microcomputer processor after the circulating liquid flows into the water tank 23, and the temperature of the circulating fluid is finely adjusted, so that the accurate temperature control value +/-0.1 ℃ of the target circulating fluid is achieved.

Example 2

The difference between this embodiment and embodiment 1 is that, as shown in fig. 1, a circulating liquid high temperature sensor and a circulating liquid low temperature sensor are arranged in the water tank 23 for monitoring and protecting the target circulating liquid from being too high or too low in temperature.

Example 2

The present embodiment is different from embodiment 1 in that, as shown in fig. 1, a fluid replacement tank 24 for replenishing the target circulation fluid is further provided on the water tank 23.

Example 2

The difference between this embodiment and embodiment 1 is that, as shown in fig. 1, a circulation liquid branch ii is provided through the circulation liquid pipeline, an input end of the circulation liquid branch ii is located downstream of the flow meter 16, and a liquid discharge hand valve 14 is mounted on the circulation liquid branch ii for discharging and replacing the circulation liquid.

Example 2

The difference between this embodiment and embodiment 1 is that, as shown in fig. 1, a circulation liquid branch iii is provided through the circulation liquid pipeline, an input end and an output end of the circulation liquid branch iii are respectively located downstream of the flow meter 16 and downstream of the pressure gauge 27, and a branch hand valve 19 is installed on the circulation liquid branch iii.

Other undescribed structures refer to example 1.

According to the extremely-high and extremely-low temperature control system provided by the embodiment of the invention, the refrigeration is switched at the set target temperature through temperature differentiation, so that the energy consumption of the compressor is saved, the service life of the compressor is prolonged, the condition that the refrigeration system is unstable due to overheating of the compressor can be avoided, the heat exchange refrigeration is carried out through the plant cooling water, the refrigerating capacity of the refrigeration system can be effectively increased or reduced by increasing or reducing the flow of the plant cooling water within a reasonable range, and the refrigerating capacity is large at high temperature.

The embodiments of the present invention are disclosed as the preferred embodiments, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes without departing from the spirit of the present invention.