阅读说明：本技术 一种双机制超低温制冷车载制冷系统 (Double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system ) 是由 马超 姚平 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种双机制超低温制冷车载制冷系统,包括压缩机、止逆阀、冷凝压力调节器、冷凝器、储液器、膨胀阀、钎焊板式换热器、气液分离器,压缩机的制冷剂出口依次与止逆阀、冷凝压力调节器、冷凝器、储液器、膨胀阀、钎焊板式换热器、气液分离器、压缩机的制冷剂入口连通；止逆阀、冷凝压力调节器之间旁路管连通至储液器、冷凝器之间管路,且旁路管中连通接入有压差阀。本发明利用常规压缩机制冷和多种控制装置相结合,可以在满足电子设备制冷的要求的同时,提供适温的冷却液,避免冷却液温度不满足设计要求对脆弱的电子元件造成破坏。(The invention discloses a double-machine ultra-low temperature refrigeration vehicle-mounted refrigeration system which comprises a compressor, a check valve, a condensation pressure regulator, a condenser, a liquid storage device, an expansion valve, a brazing plate type heat exchanger and a gas-liquid separator, wherein a refrigerant outlet of the compressor is sequentially communicated with refrigerant inlets of the check valve, the condensation pressure regulator, the condenser, the liquid storage device, the expansion valve, the brazing plate type heat exchanger, the gas-liquid separator and the compressor; a bypass pipe between the check valve and the condensing pressure regulator is communicated with a pipeline between the liquid reservoir and the condenser, and a differential pressure valve is communicated and connected in the bypass pipe. The invention utilizes the combination of the refrigeration of a conventional compressor and a plurality of control devices, can provide cooling liquid with proper temperature while meeting the refrigeration requirement of electronic equipment, and avoids the damage to fragile electronic components caused by the fact that the temperature of the cooling liquid does not meet the design requirement.)

1. The utility model provides a double-deck ultra-low temperature refrigeration vehicle-mounted refrigerating system which characterized in that: the condenser comprises a compressor, a check valve, a condensation pressure regulator, a condenser provided with a condensation fan, a liquid storage device, an expansion valve, a brazed plate type heat exchanger and a gas-liquid separator, wherein a refrigerant outlet of the compressor is connected with an inlet of the check valve through a pipeline, an outlet of the check valve is connected with an inlet of the condensation pressure regulator through a pipeline, an outlet of the condensation pressure regulator is connected with one end port of the condenser through a pipeline, the other end port of the condenser is communicated with the inside of the liquid storage device through a pipeline, the inside of the liquid storage device is also communicated with an inlet of the expansion valve through a pipeline, an outlet of the expansion valve is connected with a refrigerant inlet of the brazed plate type heat exchanger through a pipeline, a refrigerant outlet of the brazed plate type heat exchanger is communicated; a bypass pipe is led out from a pipeline between the check valve and the condensing pressure regulator, communicated to a pipeline between the liquid reservoir and the condenser, and communicated with a differential pressure valve.

2. The dual-mechanism ultra-low temperature refrigeration vehicle-mounted refrigeration system as claimed in claim 1, characterized in that: the pipeline connected with the refrigerant inlet of the compressor is communicated and connected with a low-pressure switch, and the pipeline connected with the refrigerant outlet of the compressor is communicated and connected with a high-pressure switch.

3. The dual-mechanism ultra-low temperature refrigeration vehicle-mounted refrigeration system as claimed in claim 1, characterized in that: the condenser has a plurality ofly, and every condenser corresponds respectively to dispose condensation pressure regulator, and each condensation pressure regulator's entry connects the back again with the exit linkage of check valve altogether, and every condensation pressure regulator's export is connected with the one end port of the condenser that corresponds respectively, and the other end port of each condenser connects the back again with the inside intercommunication of reservoir altogether.

4. The dual-mechanism ultra-low temperature refrigeration vehicle-mounted refrigeration system as claimed in claim 1, characterized in that: the pipeline of condenser exit linkage feeds through and inserts fan speed regulator pressure sensor, and the fan speed regulator is connected with the condensation fan, experiences condensation pressure through the sensor, and output signal control condensation fan rotational speed.

5. The dual-mechanism ultra-low temperature refrigeration vehicle-mounted refrigeration system as claimed in claim 1, characterized in that: and a pipeline of the liquid storage device towards the inlet of the expansion valve is sequentially communicated and connected with a drying filter and a liquid sight glass.

6. The dual-mechanism ultra-low temperature refrigeration vehicle-mounted refrigeration system as claimed in claim 5, characterized in that: a bypass pipeline is led out from a pipeline between the liquid observation mirror and the expansion valve and communicated to a pipeline between the brazing plate type heat exchanger and the gas-liquid separator, and a ball valve and a temperature response expansion valve are communicated and connected into the bypass pipeline.

Technical Field

The invention relates to the field of vehicle-mounted refrigeration systems, in particular to a double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system.

Background

With the use of a large number of vehicle-mounted electronic devices, the thermal load of the electronic devices is continuously increased, and the working environment temperature of the electronic devices also affects the reliability and the service life of the electronic devices. Due to the particularity of the vehicle-mounted electronic equipment, the vehicle-mounted electronic equipment still needs to be cooled in an outdoor low-temperature state; on the other hand, the stability of the system is higher than that of the conventional refrigeration due to low-temperature refrigeration, and higher requirements are put forward on the reliability of the refrigeration system in order to ensure the normal work of the vehicle-mounted equipment. Therefore, in order to meet the requirements of the vehicle-mounted electronic equipment, a refrigeration system needs to be specially designed so as to meet the refrigeration requirements and reliability requirements under the condition of low temperature or extremely low extreme environmental temperature.

Disclosure of Invention

The invention aims to provide a double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system to solve the problem that vehicle-mounted refrigeration equipment in the prior art cannot meet the reliability requirement of an extremely low-temperature environment.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a double-deck ultra-low temperature refrigeration vehicle-mounted refrigerating system which characterized in that: the condenser comprises a compressor, a check valve, a condensation pressure regulator, a condenser provided with a condensation fan, a liquid storage device, an expansion valve, a brazed plate type heat exchanger and a gas-liquid separator, wherein a refrigerant outlet of the compressor is connected with an inlet of the check valve through a pipeline, an outlet of the check valve is connected with an inlet of the condensation pressure regulator through a pipeline, an outlet of the condensation pressure regulator is connected with one end port of the condenser through a pipeline, the other end port of the condenser is communicated with the inside of the liquid storage device through a pipeline, the inside of the liquid storage device is also communicated with an inlet of the expansion valve through a pipeline, an outlet of the expansion valve is connected with a refrigerant inlet of the brazed plate type heat exchanger through a pipeline, a refrigerant outlet of the brazed plate type heat exchanger is communicated; a bypass pipe is led out from a pipeline between the check valve and the condensing pressure regulator, communicated to a pipeline between the liquid reservoir and the condenser, and communicated with a differential pressure valve.

The double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system is characterized in that: the pipeline connected with the refrigerant inlet of the compressor is communicated and connected with a low-pressure switch, and the pipeline connected with the refrigerant outlet of the compressor is communicated and connected with a high-pressure switch.

The double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system is characterized in that: the condenser has a plurality ofly, and every condenser corresponds respectively to dispose condensation pressure regulator, and each condensation pressure regulator's entry connects the back again with the exit linkage of check valve altogether, and every condensation pressure regulator's export is connected with the one end port of the condenser that corresponds respectively, and the other end port of each condenser connects the back again with the inside intercommunication of reservoir altogether.

The double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system is characterized in that: the pipeline of condenser exit linkage is gone up the intercommunication and is inserted into fan speed regulator pressure sensor, and the fan speed regulator is connected with the condensation fan, experiences condensation pressure through the sensor, and output signal control condensation fan rotational speed.

The double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system is characterized in that: and a pipeline of the liquid storage device towards the inlet of the expansion valve is sequentially communicated and connected with a drying filter and a liquid sight glass.

The double-mechanism ultralow-temperature refrigeration vehicle-mounted refrigeration system is characterized in that: a bypass pipeline is led out from a pipeline between the liquid observation mirror and the expansion valve and communicated to a pipeline between the brazing plate type heat exchanger and the gas-liquid separator, and a ball valve and a temperature response expansion valve are communicated and connected into the bypass pipeline.

According to the invention, the refrigeration of the conventional compressor is combined with various control devices, so that the refrigeration requirement of electronic equipment can be met, and meanwhile, the cooling liquid with a proper temperature is provided, and the damage to fragile electronic components caused by the fact that the temperature of the cooling liquid does not meet the design requirement is avoided.

The refrigerating system comprises a compressor, a condenser, a liquid storage device, a brazed plate heat exchanger, a gas-liquid separator and other equipment, wherein all the equipment are communicated through pipelines, and the equipment exchanges heat with cooling liquid through the brazed plate heat exchanger to provide the cooling liquid meeting the requirements for loads.

The liquid sight glass, the drying filter and the liquid storage device are arranged in front of the expansion valve in the refrigeration system, so that the proper amount and cleanness of the refrigerant entering the system circulation are ensured. The inlet and outlet of the compressor are provided with low and high pressure switch pressure switches, and a check valve is arranged behind the high pressure switch, so that the compressor can be protected when the system pressure exceeds a normal range.

The condensing fan adjusts the rotating speed through the fan speed controller, controls the heat exchange quantity of the condenser, and can ensure the normal operation of the refrigeration cycle in a low-temperature environment; meanwhile, a condensing pressure regulator is arranged in front of an inlet of the condenser and controls the proportion of the refrigerant flowing through the condenser together with a pressure difference valve arranged between the liquid storage device and the compressor, so that high-pressure and low-pressure difference is kept in a low-temperature environment, and normal operation of refrigeration work is guaranteed.

The bypass pipeline is arranged between the liquid viewing mirror and the gas-liquid separator, and the temperature response expansion valve arranged on the bypass pipeline can reduce the exhaust temperature by spraying when the pressure at the high-pressure end is overhigh, so that the temperature of a loaded electronic element can be controlled to the maximum extent.

The invention has the beneficial effects that:

1) the liquid cooling system can meet the requirement of outputting cooling liquid under extreme environmental conditions.

2) The system meets the requirement of larger refrigerating capacity under the condition that the system size and the power load are limited and further the heat exchange capacity of the heat exchanger is limited.

3) The system can continuously work when the load is unloaded, and simultaneously responds to the output refrigerating capacity immediately when the load is hung, so that the intermittent working characteristic of the laser weapon equipment is fully utilized: when the laser weapon equipment is not lighted, namely the load is not loaded, the system continuously works, and when the laser weapon equipment is lighted, the system immediately responds to the output refrigerating capacity, so that the liquid supply temperature is guaranteed.

4) The system adopts two low-temperature refrigeration designs which are not interfered with each other and can mutually guarantee, and can still guarantee the normal operation of the system in a low-temperature environment under the condition that one set of refrigeration design fails.

Drawings

FIG. 1 is a schematic diagram of the system architecture of the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 1, a dual-motor ultra-low temperature refrigeration vehicle-mounted refrigeration system comprises a compressor 1, a check valve 13, a condensation pressure regulator 14, a condenser 2 provided with a condensation fan 11, a liquid storage device 3, an expansion valve 6, a brazing plate type heat exchanger 7 and a gas-liquid separator 8, wherein a refrigerant outlet of the compressor 1 is connected with an inlet of the check valve 13 through a pipeline, an outlet of the check valve 13 is connected with an inlet of the condensation pressure regulator 14 through a pipeline, an outlet of the condensation pressure regulator 14 is connected with one end port of the condenser 2 through a pipeline, the other end port of the condenser 2 is communicated with the inside of the liquid storage device 3 through a pipeline, the inside of the liquid storage device 3 is also communicated with an inlet of the expansion valve 6 through a pipeline, an outlet of the expansion valve 6 is connected with a refrigerant inlet of the brazing plate type heat exchanger 7 through, the interior of the gas-liquid separator 8 is also communicated with a refrigerant inlet of the compressor 1 through a pipeline; a bypass pipe is led out from a pipeline between the check valve 13 and the condensing pressure regulator 14, the bypass pipe is communicated with a pipeline between the liquid reservoir 3 and the condenser 2, and a differential pressure valve 15 is communicated and connected into the bypass pipe.

After the compressor 1 is started, refrigerant vapor after heat exchange through the brazing plate type heat exchanger 7 is absorbed through the connecting pipeline and compressed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the condenser 2 to finish condensation and heat release, the high-temperature high-pressure gas is changed into medium-temperature high-pressure liquid refrigerant with a certain supercooling degree, and the liquid refrigerant is finally collected into the liquid reservoir 3. The medium-temperature high-pressure liquid refrigerant passes through the expansion valve 6 under the action of pressure difference, is changed into a low-temperature low-pressure gas-liquid mixture through the throttling and pressure-reducing action of the expansion valve 6, enters the brazed plate heat exchanger 7, and is severely vaporized and absorbs heat due to the sharp pressure reduction of the refrigerant, so that the temperature of the cooling liquid passing through the other side of the plate heat exchanger is reduced. The refrigerant absorbs heat and enters the gas-liquid separator 8, and finally returns to the compressor 1 to complete a refrigeration cycle.

A bypass pipe is led out from a pipeline between the check valve 13 and the condensing pressure regulator 14, the bypass pipe is communicated with a pipeline between the liquid reservoir 3 and the condenser 2, a pressure difference valve 15 is communicated and connected into the bypass pipe, and the condensing pressure regulator 14 is arranged in front of an inlet of the condenser 2. Under the low temperature environment, because the condensation temperature difference is big, heat exchange efficiency is high, and temperature pressure sharply drops after high temperature high pressure gas gets into condenser 2 and condenses the heat release, and differential pressure valve 15 opens, and partial refrigerant is direct to get into reservoir 3 by the bypass pipe not taking the condenser 2 cooling down, improves temperature and pressure before the expansion valve 3 in order to ensure refrigeration work normal operating. The mechanism and the condensing fan speed regulation mechanism can take effect simultaneously without mutual interference and can mutually guarantee, under the condition that one set of low-temperature refrigeration mechanism fails, the other set of low-temperature refrigeration mechanism continues to take effect, and normal operation of refrigeration work in a low-temperature environment is guaranteed to a greater extent.

In the invention, a low-pressure switch 9 is connected to a pipeline connected with a refrigerant inlet of the compressor 1 in a communicating manner, and a high-pressure switch 10 is connected to a pipeline connected with a refrigerant outlet of the compressor 1 in a communicating manner. The low-voltage switch 9 and the high-voltage switch 10 can monitor the system pressure value in real time when the system runs and give an alarm when the system pressure is abnormal. A non-return valve 13 is also installed at the outlet of the compressor 1 to prevent the reverse flow of the refrigerant.

In the invention, a plurality of condensers 2 are provided, each condenser 2 is correspondingly provided with a condensing pressure regulator 14, the inlets of the condensing pressure regulators 14 are connected with the outlet of a check valve 13, the outlet of each condensing pressure regulator 14 is connected with one end port of the corresponding condenser 2, and the other end port of each condenser 2 is connected with the inside of the liquid storage device 3.

In the invention, a fan speed regulator 12 is connected to a pipeline connected with the outlet of the condenser 2, and the fan speed regulator 12 is in control connection with the condensing fan 11. The pipeline of 2 exit linkage of condenser communicates the pressure sensor who inserts fan speed regulator 12 on the access, and fan speed regulator 12 is connected with the condensation fan, experiences condensation pressure through the sensor, and output signal control condensation fan rotational speed.

The condenser 2 carries out forced convection heat transfer through the condensing fan 11, and under low temperature environment, because the condensation temperature difference is big, heat exchange efficiency is high, leads to the low refrigeration cycle that can't be established to high-pressure steam condensation heat transfer back temperature. In order to solve the problem, a fan speed regulator 12 is arranged at the outlet of the condenser 2, and the rotating speed of the condensing fan 11 can be regulated to regulate the heat exchange quantity of the condenser and ensure the normal operation of the refrigeration work.

In the invention, a pipeline of the liquid reservoir 3 towards the inlet of the expansion valve 6 is sequentially communicated and connected with a dry filter 4 and a liquid sight glass 5. A bypass pipeline is led out from a pipeline between the liquid observation mirror 5 and the expansion valve 6, the bypass pipeline is communicated to a pipeline between the brazing plate type heat exchanger 7 and the gas-liquid separator 8, and a ball valve 16 and a temperature response expansion valve 17 are communicated and connected into the bypass pipeline.

A dry filter 4 and a liquid viewing mirror 5 are installed in front of the expansion valve 3. The drying filter 4 is used for drying and filtering the refrigerant to remove moisture and impurities in the refrigerant, so that the phenomenon that the moisture is frozen at a low temperature to form ice blockage and the impurities form dirty blockage at a narrow part of a system is avoided; whether refrigerant filling amount matches with the system can be observed according to the liquid level condition through looking liquid mirror 5, simultaneously, is furnished with the test paper that discolours according to the water content on this looking liquid mirror, makes things convenient for whether the moisture is dry completely in the observation system.

A bypass pipeline between the liquid observation mirror 5 and the expansion valve 6 is communicated to a pipeline between the brazed plate heat exchanger 7 and the gas-liquid separator 8, and a ball valve 16 and a temperature response expansion valve 17 are communicated and connected in the bypass pipeline. The ball valve 16 can manually control the opening and closing states of the bypass pipeline, and the temperature response expansion valve 17 automatically opens to reduce the exhaust temperature when detecting that the exhaust temperature of the system is overhigh.

The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.