Vehicle-mounted cooling liquid circulation system

Abstract

The invention discloses a vehicle-mounted cooling liquid circulation system which comprises a refrigerant circulation loop and a cooling liquid circulation loop. The refrigerant circulation loop comprises a compressor, a condenser, a throttling device, an evaporator, a fluorine pump, a first one-way valve and a second one-way valve, the first one-way valve is connected between the condenser and the throttling device, an inlet of the fluorine pump is connected between the first one-way valve and the condenser, and an outlet of the fluorine pump is connected between the throttling device and the evaporator; one end of the second one-way valve is connected between the compressor and the condenser, the other end of the second one-way valve is connected between the evaporator and the compressor, and refrigerant of the refrigerant circulation loop and cooling liquid of the cooling liquid circulation loop conduct heat exchange through the evaporator. The overall size and weight are effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of coolant circulation systems, in particular to a vehicle-mounted coolant circulation system. Background Art

[0002] At present, vehicle-mounted coolant circulation systems have been widely used to cool heat-generating equipment such as vehicle-mounted radars and vehicle-mounted lasers. Their function is to produce coolant at a specified temperature to cool the heat-generating equipment (i.e., heat load).

[0003] The vehicle's coolant circulation system consists of a refrigerant circuit and a coolant circuit. In the refrigerant circuit, the refrigerant output from the compressor flows through a condenser, a throttling device, and an evaporator before returning to the compressor. The evaporator has refrigerant and coolant flow channels, with the refrigerant flow channel passing through.

[0004] There are two coolant cycles in the coolant circulation loop. In the first coolant cycle, the coolant stored in the solution tank is transported by the liquid supply pump to the coolant flow channel of the evaporator in the refrigerant circulation loop, and then returns to the solution tank after the heat load; in the second coolant cycle, the coolant stored in the solution tank is transported by the liquid supply pump to the coolant flow channel of the evaporator in the refrigerant circulation loop, and then returns to the solution tank after the heat load.

[0005] In high-temperature environments, the first coolant circuit in the coolant circulation loop operates, and the refrigerant circuit operates. At this time, the coolant and the refrigerant in the refrigerant circulation loop exchange heat through the evaporator. The refrigerant cools the coolant, and the cooled coolant is then used to cool the heat load. In low-temperature environments, the second coolant circuit in the coolant circulation loop operates. At this time, the coolant exchanges heat with the ambient air through the air-cooled heat exchanger. The ambient air cools the coolant, and the cooled coolant is then used to cool the heat load.

[0006] Since an air-cooled heat exchanger is required in the coolant circulation loop in the prior art to cool the coolant in a low-temperature environment, there are problems of large volume and weight. Summary of the Invention

[0007] The present invention provides a vehicle-mounted coolant circulation system to solve the problems of large volume and weight of the prior art vehicle-mounted coolant circulation system.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is: A vehicle-mounted coolant circulation system comprises a refrigerant circulation circuit and a coolant circulation circuit; the refrigerant circulation circuit comprises 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 circuit 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 system flows through the evaporator (11) in the refrigerant circulation circuit, and the coolant and the refrigerant are heat-exchanged through the evaporator (11); the system further comprises a fluorine pump (15), a first one-way valve (16.1), and a second one-way valve (16.2); the first one-way valve (16.1) is connected to the condenser (13) and the throttling device (14), and the conducting direction of the first one-way valve (16.1) is from the condenser (13) to the throttling device (14); the inlet of the fluorine pump (15) is connected to the first one-way valve (16.1) and the condenser (13), and the outlet of the fluorine pump (15) is connected to the throttling device (14) and the evaporator (11); one end of the second one-way valve (16.2) is connected to the compressor (12) and the condenser (13), and the other end of the second one-way valve (16.2) is connected to the evaporator (11) and the compressor (12), and the conducting direction of the second one-way valve (16.2) is from the evaporator (11) and the compressor (12) to the compressor (12) and the condenser (13).

[0009] Furthermore, the cooling liquid circulation loop includes a solution tank (21), a liquid supply pump (22), and a heat load (23). The cooling liquid in the solution tank (21) in the cooling liquid circulation loop is transported by the liquid supply pump (22) to flow through the evaporator (11) and the heat load (23) in sequence and then returns to the solution tank (21).

[0010] Furthermore, the first one-way valve (16.1) and the second one-way valve (16.2) are both controlled by a controller to be turned on or off.

[0011] In the present invention, when working in a high-temperature environment, the first one-way valve in the refrigerant circulation loop is turned on and the second one-way valve is turned off. At this time, the refrigerant output by the compressor flows through the condenser, the first one-way valve, the throttling device, the evaporator and then returns to the compressor. The coolant in the coolant circulation loop is transported by the liquid supply pump to flow through the evaporator and the heat load in turn and then returns to the solution tank. The refrigerant and the coolant exchange heat in the evaporator, thereby forming cooled coolant to cool the heat load.

[0012] When working in a low-temperature environment, the compressor in the refrigerant circulation loop does not work, and the first one-way valve is disconnected and the second one-way valve is connected. The fluorine pump is used to provide power, so that the refrigerant flows through the evaporator, the second one-way valve, and the condenser in sequence and then returns to the fluorine pump. The coolant in the coolant circulation loop is transported by the liquid supply pump to flow through the evaporator and the heat load in sequence and then returns 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, thereby forming a coolant and a coolant to cool the heat load.

[0013] As can be seen from the above process, compared to the prior art, the present invention eliminates the need for an air-cooled heat exchanger in the coolant circulation loop. Instead, the present invention adds two one-way valves and a fluorine pump to the refrigerant circulation loop. These two one-way valves and a fluorine pump, in conjunction with a condenser, enable heat exchange between the refrigerant and the ambient air, thereby cooling the coolant in low-temperature environments. Despite the addition of two one-way valves and a fluorine pump, the present invention still effectively reduces the overall volume and weight compared to larger and heavier air-cooled heat exchangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural principle diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] like Figure 1 As shown, this embodiment discloses a vehicle-mounted coolant circulation system, including a refrigerant circulation circuit and a coolant circulation circuit.

[0017] The refrigerant circulation circuit 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 fluorine pump 15. The evaporator 11 has a refrigerant flow channel and a coolant flow channel. 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 conducts from the condenser 13 to the throttling device 14. The outlet of the throttling device 14 is connected to the refrigerant flow channel inlet of the evaporator 11 via a pipeline. The refrigerant flow channel outlet of the evaporator 11 is connected to the return port of the compressor 12 via a pipeline.

[0018] The inlet of the fluorine 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 through a pipeline bypass, and the outlet of the fluorine 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 through a pipeline bypass.

[0019] The inlet of second one-way valve 16.2 is connected to the pipeline between the refrigerant flow outlet of evaporator 11 and the return port of compressor 12 via a pipeline bypass. The outlet of second one-way valve 16.2 is also connected to the pipeline between the output port of compressor 12 and the inlet of condenser 13 via a pipeline bypass. The conduction direction of second one-way valve 16.2 is from the refrigerant flow outlet of evaporator 11 and the return port of compressor 12 to the output port of compressor 12 and the inlet of condenser 13. In addition, the opening and closing of first one-way valve 16.1 and second one-way valve 16.2 are controlled by a controller.

[0020] The coolant circulation loop includes a solution tank 21, a liquid supply pump 22, a heat load 23, and the coolant flow path of the evaporator 11. The outlet of the solution tank 21 is connected to the inlet of the liquid supply pump 22 via a pipeline. The outlet of the liquid supply pump 22 is connected to the inlet of the coolant flow path of the evaporator 11 via a pipeline. The outlet of the coolant flow path of the evaporator 11 is connected to the inlet of the heat load 23 via a pipeline. The outlet of the heat load 23 is connected to the inlet of the solution tank 21 via a pipeline.

[0021] When working in a high-temperature environment, the compressor 1 in the refrigerant circulation circuit works, the first one-way valve 16.1 is open, the fluorine pump 15 does not work, and the second one-way valve 16.2 is open.

[0022] When working in a high temperature environment, the liquid supply pump 22 in the coolant circulation loop delivers the coolant in 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.

[0023] When operating in a high-temperature environment, in the refrigerant circulation circuit, the high-temperature, high-pressure refrigerant output by the compressor 1 first flows into the condenser 13. The high-temperature, high-pressure refrigerant releases heat to the external ambient air through the condenser 13 to form a high-pressure, subcooled refrigerant. The high-pressure, subcooled refrigerant then flows into the throttling device 14 through the first one-way valve 16.1, where it is reduced in pressure to a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant then flows through the refrigerant flow channel of the evaporator 11. The low-temperature, low-pressure liquid refrigerant and the coolant exchange heat through the evaporator 11. The low-temperature, low-pressure liquid refrigerant absorbs the heat of the coolant, causing the coolant to cool down. The refrigerant, after absorbing heat, eventually returns to the compressor 1, thus forming a refrigerant cycle. During this cycle, the coolant is cooled by the refrigerant, and the cooled coolant cools the heat load in the coolant circulation circuit.

[0024] When working in a low-temperature environment, the compressor 1 in the refrigerant circulation circuit does not work, the first one-way valve 16.1 is disconnected, the fluorine pump 15 works, and the second one-way valve 16.2 is opened.

[0025] When working in a low temperature environment, the liquid supply pump 22 in the coolant circulation loop delivers the coolant in 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.

[0026] When operating in a low-temperature environment, the low-temperature refrigerant flowing out of the condenser 13 is transported by the fluorine pump 15 to the refrigerant flow path of the evaporator 11. At this time, the low-temperature refrigerant absorbs heat from the coolant in the evaporator 11, thereby exchanging heat with the coolant to cool the coolant. The cooled coolant cools the heat load in the coolant circulation loop. The refrigerant that has absorbed heat returns to the condenser 13 through the second one-way valve 16.2 and exchanges heat with the external ambient air through the condenser 13, thereby cooling the refrigerant again. The refrigerant that has been cooled is then transported back to the refrigerant flow path of the evaporator 11 by the fluorine pump 15, thus forming a refrigerant cycle. During this cycle, the coolant is cooled by the refrigerant, the cooled coolant cools the heat load in the coolant circulation loop, and the refrigerant that has absorbed heat is cooled again by the condenser 13 to cool the coolant. Therefore, a separate air-cooled heat exchanger is not required in the coolant circulation.

[0027] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner unless there is any contradiction. Such combinations should also be regarded as the contents disclosed in this disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0028] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by those skilled in the art should fall within the scope of protection of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A vehicle-mounted coolant circulation system, comprising a refrigerant circulation circuit and a coolant circulation circuit; the refrigerant circulation circuit comprises 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 circuit 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 system flows through the evaporator (11) in the refrigerant circulation circuit, and the coolant and the refrigerant exchange heat through the evaporator (11), characterized in that: The invention also includes a fluorine pump (15), a first one-way valve (16.1), and a second one-way valve (16.2); the first one-way valve (16.1) is connected between the condenser (13) and the throttling device (14), and the conducting direction of the first one-way valve (16.1) is from the condenser (13) to the throttling device (14); the inlet of the fluorine pump (15) is connected between the first one-way valve (16.1) and the condenser (13), and the outlet of the fluorine pump (15) is connected between the throttling device (14) and the evaporator (11); one end of the second one-way valve (16.2) is connected between the compressor (12) and the condenser (13), and the other end of the second one-way valve (16.2) is connected between the evaporator (11) and the compressor (12), and the conducting direction of the second one-way valve (16.2) is from between the evaporator (11) and the compressor (12) to between the compressor (12) and the condenser (13).

2. The vehicle-mounted coolant circulation system according to claim 1, characterized in that: The cooling liquid circulation loop comprises a solution tank (21), a liquid supply pump (22), and a heat load (23). In the cooling liquid circulation loop, the cooling liquid in the solution tank (21) is transported by the liquid supply pump (22) to flow through the evaporator (11), the heat load (23) in sequence, and then returns to the solution tank (21).

3. The vehicle-mounted coolant circulation system according to claim 1, characterized in that: The first one-way valve (16.1) and the second one-way valve (16.2) are both controlled by a controller to be turned on or off.

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