Vehicle-mounted cooling liquid circulation system

Abstract

The utility model discloses a vehicle-mounted cooling liquid circulating system, including refrigerant circulation loop, cooling liquid circulation loop, refrigerant circulation loop includes compressor, condenser, throttling device, evaporimeter, fluorine pump, first check valve, second check valve, and first check valve is accessed between condenser, throttling device, and fluorine pump import is accessed between first check valve, condenser, and fluorine pump export is accessed between throttling device, evaporimeter, second check valve one end is accessed between compressor, condenser, and the other end is accessed to evaporimeter, compressor between, and the heat exchange of refrigerant circulation loop's refrigerant and cooling liquid circulation loop's cooling liquid is carried out through evaporimeter. The utility model effectively reduces the overall volume and weight.

Description

Technical Field

[0001] This utility model relates to the field of coolant circulation systems, specifically an on-board coolant circulation system. Background Technology

[0002] Currently, vehicle-mounted coolant circulation systems are widely used for cooling heat-generating equipment such as vehicle-mounted radar and vehicle-mounted lasers. Their function is to produce coolant at a specified temperature to cool the heat-generating equipment (i.e., the heat load).

[0003] The vehicle-mounted coolant circulation system includes a refrigerant circulation loop and a coolant circulation loop. In the refrigerant circulation loop, the refrigerant output from the compressor flows sequentially through the condenser, the throttling device, and the evaporator before returning to the compressor. The evaporator has both a refrigerant flow channel and a coolant flow channel, through which the refrigerant flows.

[0004] The coolant circulation loop has two coolant circulation paths. In the first coolant circulation path, the coolant stored in the solution tank is delivered by the supply pump to the coolant flow channel of the evaporator in the refrigerant circulation loop and then flows through the heat load before returning to the solution tank. In the second coolant circulation path, the coolant stored in the solution tank is delivered by the supply pump to the air-cooled heat exchanger and then flows through the heat load before returning to the solution tank.

[0005] In high-temperature environments, the first coolant circulation loop operates, along with the refrigerant circulation loop. During this process, the coolant and refrigerant exchange heat through the evaporator, with the refrigerant cooling the coolant, which then helps to reduce the heat load. In low-temperature environments, the second coolant circulation loop operates. Here, the coolant exchanges heat with the ambient air through an air-cooled heat exchanger, and the ambient air cools the coolant, which then helps to reduce the heat load.

[0006] Because existing technologies require air-cooled heat exchangers in the coolant circulation loop to cool the coolant in low-temperature environments, they suffer from large size and weight. Utility Model Content

[0007] This invention provides an on-board coolant circulation system to solve the problems of large size and weight of existing on-board coolant circulation systems.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A vehicle-mounted coolant circulation system includes a refrigerant circulation loop and a coolant circulation loop. The refrigerant circulation loop includes a compressor (12), a condenser (13), a throttling device (14), and an evaporator (11). The refrigerant output from the compressor (12) in the refrigerant circulation loop flows sequentially through the condenser (13), the throttling device (14), and the evaporator (11) before returning to the compressor (12). The coolant in the coolant circulation loop flows through the evaporator (11) in the refrigerant circulation loop, and the coolant and refrigerant exchange heat through the evaporator (11). The system also includes a refrigerant pump (15), a first check valve (16.1), and a second check valve (16.2). The first check valve (16.1) is connected to the condenser. (13) Between the throttling device (14) and the first check valve (16.1) is directed from the condenser (13) to the throttling device (14); the inlet of the refrigerant pump (15) is connected between the first check valve (16.1) and the condenser (13), and the outlet of the refrigerant pump (15) is connected between the throttling device (14) and the evaporator (11); one end of the second check valve (16.2) is connected between the compressor (12) and the condenser (13), and the other end of the second check valve (16.2) is connected between the evaporator (11) and the compressor (12), and the direction of the second check valve (16.2) is from the evaporator (11) and the compressor (12) to the compressor (12) and the condenser (13).

[0010] Furthermore, the coolant circulation loop includes a solution tank (21), a supply pump (22), and a heat load (23). In the coolant circulation loop, the coolant in the solution tank (21) is transported by the supply pump (22) to the evaporator (11) and the heat load (23) in sequence before returning to the solution tank (21).

[0011] Furthermore, both the first check valve (16.1) and the second check valve (16.2) are controlled by the controller to turn on or off.

[0012] In this invention, when operating in a high-temperature environment, the first one-way valve in the refrigerant circulation loop is open and the second one-way valve is closed. At this time, the refrigerant output by the compressor flows sequentially through the condenser, the first one-way valve, the throttling device, and the evaporator before returning to the compressor. The coolant in the coolant circulation loop is delivered by the liquid supply pump to the solution tank, which flows sequentially through the evaporator and the heat load. The refrigerant and coolant exchange heat in the evaporator, thereby forming a cooled coolant to reduce the heat load.

[0013] When operating in a low-temperature environment, the compressor in the refrigerant circulation loop does not work, and the first one-way valve is open while the second one-way valve is open. Power is provided by the refrigerant pump, which causes the refrigerant to flow sequentially through the evaporator, the second one-way valve, and the condenser before returning to the refrigerant pump. Meanwhile, the coolant in the coolant circulation loop is delivered by the liquid supply pump and flows sequentially through the evaporator and the heat load before returning to the solution tank. At this time, the condenser is used to exchange heat between the refrigerant and the external ambient air to cool the refrigerant. The cooled refrigerant then exchanges heat with the coolant through the evaporator, thus forming a coolant to cool the heat load.

[0014] As can be seen from the above process, compared with the prior art, the coolant circulation loop of this invention does not require an air-cooled heat exchanger. This invention adds two one-way valves and one refrigerant pump to the refrigerant circulation loop. The two one-way valves and one refrigerant pump, in conjunction with the condenser, achieve heat exchange between the refrigerant and the external ambient air, thereby cooling the coolant in low-temperature environments. Although this invention adds two one-way valves and one refrigerant pump, it still effectively reduces the overall size and weight compared to large-volume, heavy air-cooled heat exchangers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, this embodiment discloses an on-board coolant circulation system, including a refrigerant circulation loop and a coolant circulation loop.

[0018] The refrigerant circulation loop includes a compressor 12, a condenser 13, a throttling device 14, an evaporator 11, a first one-way valve 16.1, a second one-way valve 16.2, and a refrigerant pump 15. The evaporator 11 has a refrigerant flow path and a coolant flow path. The output port of the compressor 12 is connected to the inlet of the condenser 13 via a pipeline. The outlet of the condenser 13 is connected to the inlet of the first one-way valve 16.1 via a pipeline. The outlet of the first one-way valve 16.1 is connected to the inlet of the throttling device 14 via a pipeline. The first one-way valve 16.1 is open from the condenser 13 to the throttling device 14. The outlet of the throttling device 14 is connected to the refrigerant flow path inlet of the evaporator 11 via a pipeline. The refrigerant flow path outlet of the evaporator 11 is connected to the return port of the compressor 12 via a pipeline.

[0019] The inlet of the refrigerant pump 15 is connected to the pipeline between the outlet of the condenser 13 and the inlet of the first one-way valve 16.1 via a bypass pipeline, and the outlet of the refrigerant pump 15 is connected to the pipeline between the outlet of the throttling device 14 and the inlet of the refrigerant flow channel of the evaporator 11 via a bypass pipeline.

[0020] The inlet of the second check valve 16.2 is connected via a bypass pipeline to the pipeline between the refrigerant outlet of the evaporator 11 and the return port of the compressor 12. The outlet of the second check valve 16.2 is connected via a bypass pipeline to the pipeline between the output port of the compressor 12 and the inlet of the condenser 13. The conduction direction of the second check valve 16.2 is from the refrigerant outlet of the evaporator 11 and the return port of the compressor 12 to the output port of the compressor 12 and the inlet of the condenser 13. Both the first check valve 16.1 and the second check valve 16.2 are controlled by a controller to open or close.

[0021] The coolant circulation loop includes a solution tank 21, a supply pump 22, a heat load 23, and a coolant flow channel for the evaporator 11. The outlet of the solution tank 21 is connected to the inlet of the supply pump 22 via a pipe, the outlet of the supply pump 22 is connected to the inlet of the coolant flow channel for the evaporator 11 via a pipe, the outlet of the coolant flow channel for the evaporator 11 is connected to the inlet of the heat load 23 via a pipe, and the outlet of the heat load 23 is connected to the inlet of the solution tank 21 via a pipe.

[0022] When operating in a high-temperature environment, compressor 1 in the refrigerant circulation loop is working, the first check valve 16.1 is open, the refrigerant pump 15 is not working, and the second check valve 16.2 is closed.

[0023] When operating in a high-temperature environment, the coolant supply pump 22 in the coolant circulation loop delivers the coolant from the solution tank 21 to the coolant flow channel that flows through the evaporator 11 and the heat load 23 in sequence, and then returns to the solution tank 21, thereby forming a coolant circulation.

[0024] When operating in a high-temperature environment, in the refrigerant circulation loop, the high-temperature, high-pressure refrigerant output from compressor 1 first flows into condenser 13. After releasing heat to the external environment through condenser 13, the high-temperature, high-pressure refrigerant becomes high-pressure subcooled refrigerant. This subcooled refrigerant then flows through the first one-way valve 16.1 into throttling device 14, where its pressure is reduced to low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then flows through the refrigerant channel of evaporator 11, where it exchanges heat with the coolant. The low-temperature, low-pressure liquid refrigerant absorbs heat from the coolant, cooling it down. The refrigerant, after absorbing heat, finally returns to compressor 1, thus forming a refrigerant cycle. During this cycle, the refrigerant cools the coolant, and the cooled coolant then cools the heat load in the coolant circulation loop.

[0025] When operating in a low-temperature environment, compressor 1 in the refrigerant circulation loop does not work, the first check valve 16.1 is disconnected, the refrigerant pump 15 works, and the second check valve 16.2 is opened.

[0026] When operating in a low-temperature environment, the coolant supply pump 22 in the coolant circulation loop delivers the coolant from the solution tank 21 to the coolant flow channel that flows through the evaporator 11 and the heat load 23 in sequence, and then returns to the solution tank 21, thereby forming a coolant circulation.

[0027] When operating in a low-temperature environment, the refrigerant flowing from the condenser 13 is transported by the refrigerant pump 15 to the refrigerant channel of the evaporator 11. At this time, the low-temperature refrigerant absorbs heat from the coolant in the evaporator 11, thus exchanging heat with the coolant and cooling it down. The cooled coolant then cools the heat load in the coolant circulation loop. The refrigerant, having absorbed heat, returns to the condenser 13 through the second one-way valve 16.2, and exchanges heat with the ambient air in the condenser 13, thereby cooling the refrigerant again. The refrigerant, having been cooled again, is then transported back to the refrigerant channel of the evaporator 11 by the refrigerant pump 15, thus forming a refrigerant cycle. In this cycle, the refrigerant cools the coolant, and the cooled coolant cools the heat load in the coolant circulation loop. Furthermore, the condenser 13 cools the refrigerant after it has absorbed heat, thus cooling the coolant again. Therefore, a separate air-cooled heat exchanger is not required in the coolant circulation.

[0028] The preferred embodiments of this utility model have been described in detail above with reference to the accompanying drawings. These embodiments are merely descriptions of preferred embodiments and are not intended to limit the concept and scope of this utility model. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Such combinations, as long as they do not violate the spirit of this utility model, should also be considered as part of this disclosure. To avoid unnecessary repetition, this utility model will not further describe all possible combinations.

[0029] This utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model and without departing from the design idea of ​​this utility model, all modifications and improvements made by those skilled in the art to the technical solution of this utility model should fall within the protection scope of this utility model. The technical content for which protection is sought in this utility model has been fully recorded in the claims.

Claims

1. A vehicle-mounted coolant circulation system, comprising a refrigerant circulation loop and a coolant circulation loop; the refrigerant circulation loop includes a compressor (12), a condenser (13), a throttling device (14), and an evaporator (11), wherein the refrigerant output from the compressor (12) in the refrigerant circulation loop flows sequentially through the condenser (13), the throttling device (14), and the evaporator (11) before returning to the compressor (12); the coolant in the coolant circulation loop flows through the evaporator (11) in the refrigerant circulation loop, and the coolant and refrigerant exchange heat through the evaporator (11), characterized in that, It also includes a refrigerant pump (15), a first check valve (16.1), and a second check valve (16.2); the first check valve (16.1) is connected between the condenser (13) and the throttling device (14), and the conduction direction of the first check valve (16.1) is from the condenser (13) to the throttling device (14); the inlet of the refrigerant pump (15) is connected between the first check valve (16.1) and the condenser (13), and the outlet of the refrigerant pump (15) is connected between the throttling device (14) and the evaporator (11); one end of the second check valve (16.2) is connected between the compressor (12) and the condenser (13), and the other end of the second check valve (16.2) is connected between the evaporator (11) and the compressor (12), and the conduction direction of the second check valve (16.2) is from the evaporator (11) and the compressor (12) to the compressor (12) and the condenser (13).

2. The vehicle-mounted coolant circulation system according to claim 1, characterized in that, The coolant circulation loop includes a solution tank (21), a supply pump (22), and a heat load (23). In the coolant circulation loop, the coolant in the solution tank (21) is transported by the supply pump (22) to the evaporator (11) and the heat load (23) in sequence before returning to the solution tank (21).

3. The vehicle-mounted coolant circulation system according to claim 1, characterized in that, Both the first check valve (16.1) and the second check valve (16.2) are controlled by the controller to turn on or off.

Images