Vehicle air conditioning system and new energy vehicle

Abstract

The utility model relates to a vehicle air conditioning system and a new energy vehicle. The system comprises a control module and an air conditioning loop. The air conditioner loop comprises a first four-way valve, a second four-way valve, a plurality of electronic expansion valves, a battery heat exchange unit and an in-vehicle heat exchange unit. The battery heat exchange unit is arranged in an automobile battery bin and used for refrigerating or heating an automobile battery in the automobile battery bin. The in-vehicle heat exchange unit is arranged in a vehicle driving cabin and is used for refrigerating or heating the vehicle driving cabin; the control module is used for controlling the valves, so that the battery heat exchange unit heats the automobile battery compartment under the condition that the in-automobile heat exchange unit heats the automobile driving compartment, and the battery heat exchange unit refrigerates the automobile battery compartment under the condition that the in-automobile heat exchange unit refrigerates the automobile driving compartment. Through the technical scheme provided by the invention, the working temperature of the automobile battery is adjusted while the temperature in the automobile is adjusted.

Description

Technical Field

[0001] The present application relates to the field of air-conditioning technology, and in particular to a vehicle air-conditioning system and a new energy vehicle. Background Art

[0002] With the continuous development and iteration of new energy vehicle technology, the battery performance of new energy vehicles is constantly improving, providing new energy vehicles with longer driving range. Based on the physical characteristics of batteries, if you want to extend battery life and keep the battery in good working condition, you need to maintain a suitable operating temperature as much as possible. For example, in winter when the temperature is low, the battery operating temperature should be appropriately increased, while in summer when the temperature is high, the battery operating temperature should be appropriately reduced.

[0003] The air-conditioning system on new energy vehicles can better regulate the ambient temperature, but such ambient temperature regulation is only applicable to the interior of the vehicle and it is difficult to regulate the operating temperature of the battery. Utility Model Content

[0004] The present application provides a vehicle air-conditioning system and a new energy vehicle, which can regulate the temperature inside the vehicle while regulating the operating temperature of the battery.

[0005] In a first aspect, the present application provides a vehicle air conditioning system, the system comprising a control module and an air conditioning circuit;

[0006] The air conditioning circuit includes a first four-way valve, a second four-way valve, multiple electronic expansion valves, a battery heat exchange unit, and an in-vehicle heat exchange unit; the battery heat exchange unit is disposed in the vehicle battery compartment and is used to cool or heat the vehicle battery in the vehicle battery compartment; the in-vehicle heat exchange unit is disposed in the vehicle passenger compartment and is used to cool or heat the vehicle passenger compartment; the first four-way valve, the second four-way valve, and the multiple electronic expansion valves are used to control the flow direction of the refrigerant in the air conditioning circuit;

[0007] The control module is respectively connected to the first four-way valve, the second four-way valve and the multiple electronic expansion valves. The control module is used to control the first four-way valve, the second four-way valve and the multiple electronic expansion valves, so that when the in-vehicle heat exchange unit heats the vehicle's driving and passenger compartment, the battery heat exchange unit heats the vehicle's battery compartment, and when the in-vehicle heat exchange unit cools the vehicle's driving and passenger compartment, the battery heat exchange unit cools the vehicle's battery compartment.

[0008] In a feasible embodiment of the present application, the air-conditioning circuit includes a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, and a fourth electronic expansion valve, and the air-conditioning circuit also includes a steam-water separator, a compressor, a first off-vehicle heat exchange unit, and a second off-vehicle heat exchange unit;

[0009] The air outlet end of the steam-water separator is communicated with the air inlet end of the compressor, the air inlet end of the steam-water separator is respectively communicated with one end of the first electronic expansion valve and the first end of the in-vehicle heat exchange unit, the air outlet end of the compressor is respectively communicated with the first end of the first four-way valve and the second end of the in-vehicle heat exchange unit, and the second end of the first four-way valve is communicated with the other end of the first electronic expansion valve;

[0010] The third end of the first four-way valve is respectively connected to one end of the battery heat exchange unit and one end of the second electronic expansion valve, the other end of the battery heat exchange unit is connected to one end of the third electronic expansion valve, and the other end of the third electronic expansion valve is connected to the second end of the second four-way valve;

[0011] The fourth end of the first four-way valve is in communication with one end of the first off-board heat exchange unit, the other end of the first off-board heat exchange unit is in communication with the fourth end of the second four-way valve and one end of the fourth electronic expansion valve, and the other end of the fourth electronic expansion valve is in communication with one end of the second off-board heat exchange unit and the other end of the second electronic expansion valve.

[0012] The other end of the second exterior heat exchange unit is communicated with the first end of the second four-way valve, and the third end of the second four-way valve is communicated with the third end of the interior heat exchange unit.

[0013] In a feasible embodiment of the present application, the air conditioning circuit further includes a first valve;

[0014] One end of the first valve is communicated with one end of the third electronic expansion valve, and the other end of the first valve is communicated with the third end of the second four-way valve.

[0015] In a feasible embodiment of the present application, the air conditioning circuit further includes a second valve;

[0016] One end of the second valve is communicated with the air outlet end of the compressor, and the other end of the second valve is communicated with the second end of the in-vehicle heat exchange unit.

[0017] In a feasible embodiment of the present application, the system further includes a third valve;

[0018] One end of the third valve is communicated with the air inlet end of the steam-water separator and one end of the first electronic expansion valve respectively, and the other end of the third valve is communicated with the first end of the in-vehicle heat exchange unit.

[0019] In a feasible embodiment of the present application, the air conditioning circuit further includes an onboard hot water tank;

[0020] One end of the vehicle hot water tank is respectively communicated with the first end of the in-vehicle heat exchanger and the second end of the in-vehicle heat exchanger, and the other end of the vehicle hot water tank is respectively communicated with one end of the third electronic expansion valve and one end of the first valve.

[0021] In a feasible embodiment of the present application, the air conditioning circuit further includes a first one-way valve and a second one-way valve;

[0022] One end of the first one-way valve is connected to one end of the vehicle-mounted hot water tank, and the other end of the first one-way valve is connected to the second end of the vehicle-mounted heat exchange unit; the first one-way valve only allows the refrigerant to flow toward the vehicle-mounted hot water tank;

[0023] One end of the second one-way valve is connected to one end of the vehicle-mounted hot water tank, and the other end of the first one-way valve is connected to the first end of the in-vehicle heat exchange unit; the second one-way valve only allows the refrigerant to flow in the opposite direction to the vehicle-mounted hot water tank.

[0024] In a feasible embodiment of the present application, the control module controls the first electronic expansion valve, the third electronic expansion valve and the fourth electronic expansion valve to open, the second electronic expansion valve to close, the first end of the first four-way valve is connected to the third end, and the second end is connected to the fourth end, the first end of the second four-way valve is connected to the third end, and the second end is connected to the fourth end, so that the in-vehicle heat exchange unit heats the car's driving compartment, and at the same time the battery heat exchange unit heats the car's battery compartment.

[0025] In a feasible embodiment of the present application, the control module controls the first electronic expansion valve, the third electronic expansion valve and the fourth electronic expansion valve to open, the second electronic expansion valve to close, the first end of the first four-way valve to be connected with the fourth end, and the second end to be connected with the third end, the first end of the second four-way valve to be connected with the third end, and the second end to be connected with the fourth end, so that the in-vehicle heat exchange unit cools the vehicle's driving compartment, and at the same time the battery heat exchange unit cools the vehicle's battery compartment.

[0026] In a second aspect, the present application provides a new energy vehicle, which includes the vehicle air-conditioning system described in any one of the first aspects above.

[0027] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0028] In the system provided by the embodiment of the present application, the control module controls the first four-way valve, the second four-way valve and multiple electronic expansion valves in the air-conditioning circuit, thereby controlling the flow direction of the refrigerant in the air-conditioning circuit, so that when the in-vehicle heat exchange unit heats the vehicle's driver's compartment, the battery heat exchange unit heats the vehicle's battery compartment, and when the in-vehicle heat exchange unit cools the vehicle's driver's compartment, the battery heat exchange unit cools the vehicle's battery compartment.

[0029] When the in-car heat exchange unit heats the vehicle's passenger compartment, it can be assumed that the current ambient temperature outside the vehicle is low, and heating the vehicle's battery compartment increases the vehicle's operating temperature, preventing the vehicle's battery from operating in a low-temperature environment. When the in-car heat exchange unit cools the vehicle's passenger compartment, it can be assumed that the current ambient temperature outside the vehicle is high, and cooling the vehicle's battery compartment reduces the vehicle's operating temperature, preventing the vehicle's battery from operating in a high-temperature environment. The technical solution provided by this application not only regulates the vehicle's in-car temperature, but also regulates the vehicle's battery's operating temperature, providing a suitable operating temperature for the vehicle's battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0033] Figure 1 A schematic structural diagram of a vehicle air conditioning system provided in an embodiment of the present application.

[0034] Figure 2 A schematic diagram of the connectivity of an air-conditioning circuit in a vehicle air-conditioning system provided in an embodiment of the present application.

[0035] Figure 3 A flow diagram of an air-conditioning circuit of a vehicle air-conditioning system provided in an embodiment of the present application when heating a vehicle passenger compartment and a vehicle battery compartment.

[0036] Figure 4A flow diagram of an air-conditioning circuit of a vehicle air-conditioning system provided in an embodiment of the present application when cooling a vehicle passenger compartment and a vehicle battery compartment.

[0037] Figure 5 Another connection diagram of an air-conditioning circuit in a vehicle air-conditioning system provided in an embodiment of the present application.

[0038] Figure 6 A flow diagram of an air-conditioning circuit of a vehicle air-conditioning system provided in an embodiment of the present application when defrosting a first external heat exchanger and a second external heat exchanger. Description of the drawings:

[0040] 1. Air conditioning circuit; 2. Control module; 3. First four-way valve; 4. Second four-way valve; 5. Battery heat exchange unit; 6. In-vehicle heat exchange unit; 101. First electronic expansion valve; 102. Second electronic expansion valve; 103. Third electronic expansion valve; 104. Fourth electronic expansion valve; 105. Steam-water separator; 106. Compressor; 107. First off-vehicle heat exchanger; 108. Second off-vehicle heat exchanger; 109. First valve; 110. Second valve; 111. Third valve; 112. On-board hot water tank; 113. First one-way valve; 114. Second one-way valve. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0043] In order to solve the technical problem in the prior art that the air-conditioning system on new energy vehicles is difficult to regulate the operating temperature of the battery, the present application provides a vehicle air-conditioning system and a new energy vehicle, which can regulate the operating temperature of the battery while regulating the temperature inside the vehicle.

[0044] Figure 1This is a structural diagram of a vehicle air conditioning system provided in an embodiment of the present application, referring to Figure 1 The present application provides a vehicle air conditioning system comprising a control module 2 and an air conditioning circuit 1, wherein:

[0045] The air conditioning circuit 1 includes a first four-way valve 3, a second four-way valve 4, multiple electronic expansion valves, a battery heat exchange unit 5, and an in-vehicle heat exchange unit 6. The battery heat exchange unit 5 is disposed in the vehicle battery compartment and is used to cool or heat the vehicle battery therein. The in-vehicle heat exchange unit 6 is disposed in the vehicle passenger compartment and is used to cool or heat the vehicle passenger compartment. The first four-way valve 3, the second four-way valve 4, and the multiple electronic expansion valves are used to control the flow direction of the refrigerant in the air conditioning circuit 1.

[0046] The control module 2 is respectively connected to the first four-way valve 3, the second four-way valve 4 and multiple electronic expansion valves. The control module 2 is used to control the first four-way valve 3, the second four-way valve 4 and multiple electronic expansion valves, so that when the in-vehicle heat exchange unit 6 heats the vehicle driving compartment, the battery heat exchange unit 5 heats the vehicle battery compartment, and when the in-vehicle heat exchange unit 6 cools the vehicle driving compartment, the battery heat exchange unit 5 cools the vehicle battery compartment.

[0047] Specifically, the vehicle air-conditioning system provided in the present application can be installed on a new energy vehicle. The vehicle air-conditioning system includes an air-conditioning circuit 1 and a control module 2. Refrigerant flows in the air-conditioning circuit 1. The air-conditioning circuit 1 is provided with a first four-way valve 3, a second four-way valve 4 and multiple electronic expansion valves. A battery heat exchange unit 5 and an in-vehicle heat exchange unit 6 are also provided.

[0048] The battery heat exchange unit 5 is specifically disposed within the battery compartment of the new energy vehicle. The battery heat exchange unit 5 can be either contact or non-contact. The battery heat exchange unit 5 can exchange heat with the interior of the vehicle battery compartment through the refrigerant flowing through the battery heat exchange unit 5, thereby cooling or heating the vehicle battery within the vehicle battery compartment. Whether the battery heat exchange unit 5 cools or heats the interior of the vehicle battery compartment is determined by the state of the refrigerant flowing through the battery heat exchange unit 5. For example, if the refrigerant flowing through the battery heat exchange unit 5 is a low-temperature, low-pressure liquid refrigerant, the battery heat exchange unit 5 can cool the interior of the vehicle battery compartment.

[0049] The in-vehicle heat exchange unit 6 is specifically disposed in the passenger compartment of the new energy vehicle. Similarly, the in-vehicle heat exchange unit 6 can exchange heat with the interior of the passenger compartment via the refrigerant flowing through the in-vehicle heat exchange unit 6, thereby cooling or heating the interior of the passenger compartment. Whether the in-vehicle heat exchange unit 6 cools or heats the interior of the passenger compartment is determined by the state of the refrigerant flowing through the in-vehicle heat exchange unit 6. For example, if the refrigerant flowing through the in-vehicle heat exchange unit 6 is a high-temperature, high-pressure gaseous refrigerant, the in-vehicle heat exchange unit 6 can heat the interior of the passenger compartment.

[0050] The control module 2 is used to control various valves set in the air-conditioning circuit 1. The control module 2 can specifically be the central processing unit of a new energy vehicle. The control unit controls the various valves set in the air-conditioning circuit 1 in response to the control instructions, changes the flow direction of the refrigerant in the air-conditioning circuit 1, and controls the in-vehicle heat exchange unit 6 to cool or heat. At the same time, it can also control the battery heat exchange unit 5 to cool or heat.

[0051] In the technical solution provided in this application, the control module 2 controls the first four-way valve 3, the second four-way valve 4, and multiple electronic expansion valves so that when the in-vehicle heat exchange unit 6 heats the vehicle's passenger compartment, the battery heat exchange unit 5 heats the vehicle's battery compartment, and when the in-vehicle heat exchange unit 6 cools the vehicle's passenger compartment, the battery heat exchange unit 5 cools the vehicle's battery compartment. It is understandable that when the in-vehicle heat exchange unit 6 cools the vehicle's passenger compartment, it can be assumed that the current ambient temperature outside the vehicle is high, and cooling the vehicle's battery compartment reduces the operating temperature of the vehicle's batteries, preventing the vehicle batteries from operating in a high-temperature environment.

[0052] Reference Figure 2 In a feasible embodiment of the present application, the air conditioning circuit 1 includes a first electronic expansion valve 101, a second electronic expansion valve 102, a third electronic expansion valve 103, and a fourth electronic expansion valve 104. The air conditioning circuit 1 also includes a steam-water separator 105, a compressor 106, a first off-vehicle heat exchange unit, and a second off-vehicle heat exchange unit. In the air conditioning circuit 1, the connection method of each unit or component is as follows:

[0053] The air outlet of the steam-water separator 105 is communicated with the air inlet of the compressor 106. The air inlet of the steam-water separator 105 is respectively communicated with one end of the first electronic expansion valve 101 and the first end of the in-vehicle heat exchange unit 6. The air outlet of the compressor 106 is respectively communicated with the first end of the first four-way valve 3 and the second end of the in-vehicle heat exchange unit 6. The second end of the first four-way valve 3 is communicated with the other end of the first electronic expansion valve 101.

[0054] The third end of the first four-way valve 3 is connected to one end of the battery heat exchange unit 5 and one end of the second electronic expansion valve 102 respectively. The other end of the battery heat exchange unit 5 is connected to one end of the third electronic expansion valve 103. The other end of the third electronic expansion valve 103 is connected to the second end of the second four-way valve 4.

[0055] The fourth end of the first four-way valve 3 is connected to one end of the first off-board heat exchange unit, the other end of the first off-board heat exchange unit is respectively connected to the fourth end of the second four-way valve 4 and one end of the fourth electronic expansion valve 104, and the other end of the fourth electronic expansion valve 104 is respectively connected to one end of the second off-board heat exchange unit and the other end of the second electronic expansion valve 102;

[0056] The other end of the second exterior heat exchange unit is communicated with the first end of the second four-way valve 4 , and the third end of the second four-way valve 4 is communicated with the third end of the interior heat exchange unit 6 .

[0057] Specifically, the switching states of the first electronic expansion valve 101, the second electronic expansion valve 102, the third electronic expansion valve 103 and the fourth electronic expansion valve 104 can be controlled by the control module 2, and the specific connectivity conditions of the first four-way valve 3 and the second four-way valve 4 are also controlled by the control module 2; any two ends of the first four-way valve 3 can form a passage to allow the refrigerant to circulate; any two ends of the second four-way valve 4 can form a passage to allow the refrigerant to circulate.

[0058] The first external heat exchange unit and the second external heat exchange unit exchange heat with the external environment of the new energy vehicle. When the heat exchange occurs, the state of the refrigerant flowing in the first external heat exchange unit and the second external heat exchange unit changes.

[0059] The outlet end of the compressor 106 outputs a fixed high-temperature and high-pressure gaseous refrigerant.

[0060] In a feasible embodiment of the present application, the control module 2 controls the first electronic expansion valve 101, the third electronic expansion valve 103 and the fourth electronic expansion valve 104 to open, the second electronic expansion valve 102 to close, the first end of the first four-way valve 3 is connected to the third end, and the second end is connected to the fourth end, the first end of the second four-way valve 4 is connected to the third end, and the second end is connected to the fourth end, so that the in-vehicle heat exchange unit 6 heats the car's driving compartment, and at the same time the battery heat exchange unit 5 heats the car's battery compartment.

[0061] Based on the above embodiment, refer to Figure 3 The flow direction and status of the refrigerant in air conditioning circuit 1 are described as follows:

[0062] On the one hand, the high-temperature and high-pressure gaseous refrigerant flows out from the air outlet of the compressor 106 and flows to the in-vehicle heat exchange unit 6. It exchanges heat with the interior of the car's passenger compartment through the in-vehicle heat exchange unit 6 and is converted into liquid refrigerant. It flows to the second external heat exchanger 108 through the third end-first end of the second four-way valve 4, and then flows from the second external heat exchanger 108 to the first external heat exchanger 107 through the fourth electronic expansion valve 104. It then flows from the first external heat exchanger 107 to the steam-water separator 105 through the fourth end-second end of the first four-way valve 3, and finally flows back to the compressor 106, and is then converted into a high-temperature and high-pressure gaseous refrigerant by the compressor 106.

[0063] On the other hand, the high-temperature and high-pressure gaseous refrigerant flows out from the outlet end of the compressor 106, flows to the battery heat exchange unit 5 through the first end-third end of the first four-way valve 3, exchanges heat with the inside of the vehicle battery compartment through the battery heat exchange unit 5, and is converted into liquid refrigerant. It flows to the first external heat exchanger 107 through the third electronic expansion valve 103 and the second end-fourth end of the second four-way valve 4, and then flows from the first external heat exchanger 107 through the fourth end-second end of the first four-way valve 3 to the steam-water separator 105, and finally flows back to the compressor 106, and is then converted into a high-temperature and high-pressure gaseous refrigerant by the compressor 106.

[0064] In this embodiment, the temperature inside the car battery compartment is low, and this embodiment can be used to preheat the car battery during winter travel.

[0065] In a feasible embodiment of the present application, the control module 2 controls the first electronic expansion valve 101, the third electronic expansion valve 103 and the fourth electronic expansion valve 104 to open, the second electronic expansion valve 102 to close, the first end of the first four-way valve 3 is connected to the fourth end, and the second end is connected to the third end, the first end of the second four-way valve 4 is connected to the third end, and the second end is connected to the fourth end, so that the in-vehicle heat exchange unit 6 cools the car's driving and passenger compartment, and at the same time the battery heat exchange unit 5 cools the car's battery compartment.

[0066] Based on the above embodiment, refer to Figure 4 The flow direction and status of the refrigerant in air conditioning circuit 1 are described as follows:

[0067] The high-temperature and high-pressure gaseous refrigerant flows out from the outlet of the compressor 106, flows to the first off-vehicle heat exchange unit through the first end-fourth end of the first four-way valve 3, exchanges heat with the external environment, and is converted into a low-temperature and low-pressure liquid refrigerant.

[0068] After the refrigerant flows out of the first external heat exchange unit, it flows to the second external heat exchange unit through the fourth electronic expansion valve 104, exchanges heat with the external environment again, and then flows from the second external heat exchange unit to the internal heat exchange unit 6 through the first end-third end of the second four-way valve 4, exchanges heat with the interior of the car's passenger compartment through the internal heat exchange unit 6, and is converted into a gaseous refrigerant. It then flows from the internal heat exchange unit 6 to the steam-water separator 105, and finally flows back to the compressor 106, and is then converted into a high-temperature and high-pressure gaseous refrigerant by the compressor 106.

[0069] After the refrigerant flows out of the first external heat exchange unit, it flows to the battery heat exchange unit 5 through the fourth end-second end of the second four-way valve 4, exchanges heat with the inside of the vehicle battery compartment through the battery heat exchange unit 5, and is converted into a gaseous refrigerant. Then, the refrigerant flows from the battery heat exchange unit 5 through the third end-second end of the first four-way valve 3 and the first electronic expansion valve 101 to the steam-water separator 105, and finally flows back to the compressor 106, and is then converted into a high-temperature and high-pressure gaseous refrigerant by the compressor 106.

[0070] In this embodiment, the temperature inside the car battery compartment is high. This embodiment can be used to cool the car battery during summer travel.

[0071] The technical solution provided in this application can adjust the operating temperature of the vehicle battery and provide a suitable operating temperature for the vehicle battery.

[0072] Reference Figure 5 In a feasible embodiment of the present application, the air-conditioning circuit 1 also includes a first valve 109; one end of the first valve 109 is connected to one end of the third electronic expansion valve 103, and the other end of the first valve 109 is connected to the third end of the second four-way valve 4.

[0073] Continue to refer to Figure 5 In a feasible embodiment of the present application, the air-conditioning circuit 1 also includes a second valve 110; one end of the second valve 110 is connected to the air outlet end of the compressor 106, and the other end of the second valve 110 is connected to the second end of the in-vehicle heat exchange unit 6.

[0074] Continue to refer to Figure 5 In a feasible embodiment of the present application, the air-conditioning circuit 1 also includes a third valve 111; one end of the third valve 111 is respectively connected to the air inlet end of the steam-water separator 105 and one end of the first electronic expansion valve 101, and the other end of the third valve 111 is connected to the first end of the in-vehicle heat exchange unit 6.

[0075] Through the above embodiment, the first valve, the second valve and the third valve provided can control the flow of the refrigerant flowing through the valve, thereby controlling the cooling degree or heating degree of the heat exchange unit in the vehicle, and at the same time controlling the cooling degree or heating degree of the battery heat exchange unit.

[0076] Continue to refer to Figure 5 In a feasible embodiment of the present application, the air-conditioning circuit 1 also includes a vehicle-mounted hot water tank 112; one end of the vehicle-mounted hot water tank 112 is respectively connected to the first end of the in-vehicle heat exchanger and the second end of the in-vehicle heat exchanger, and the other end of the vehicle-mounted hot water tank 112 is respectively connected to one end of the third electronic expansion valve 103 and one end of the first valve 109.

[0077] Continue to refer to Figure 5In a feasible embodiment of the present application, the air-conditioning circuit 1 also includes a first one-way valve 113 and a second one-way valve 114; one end of the first one-way valve 113 is connected to one end of the vehicle-mounted hot water tank 112, and the other end of the first one-way valve 113 is respectively connected to the second end of the in-vehicle heat exchange unit 6; the first one-way valve 113 only allows the refrigerant to flow in the direction of the vehicle-mounted hot water tank 112; one end of the second one-way valve 114 is connected to one end of the vehicle-mounted hot water tank 112, and the other end of the first one-way valve 113 is respectively connected to the first end of the in-vehicle heat exchange unit 6; the second one-way valve 114 only allows the refrigerant to flow in the opposite direction to the vehicle-mounted hot water tank 112.

[0078] Through the above embodiment, an additional onboard hot water tank 112 can be provided in a new energy vehicle, and the onboard hot water tank 112 can be heated by a refrigerant. In the above embodiment, a high-temperature and high-pressure gaseous refrigerant additionally flows through the onboard hot water tank 112, heating the water in the onboard hot water tank 112 and providing hot water to the user.

[0079] In a feasible embodiment of the present application, a vehicle air-conditioning system provided by the present application can also realize defrosting of the first external heat exchanger 107 and the second external heat exchanger 108, so as to avoid the frost layer on the surface of the external heat exchanger in a low temperature environment, which reduces the air flow of the external heat exchanger and causes a decrease in the heating capacity of the vehicle air-conditioning system.

[0080] In order to achieve defrosting of the first external heat exchanger 107 and the second external heat exchanger 108, the control module 2 controls the first electronic expansion valve 101, the second electronic expansion valve 102 and the third electronic expansion valve 103 to open, the fourth electronic expansion valve 104 to close, the second end of the first four-way valve 3 is connected to the third end, and the first end is connected to the fourth end, and the first end of the second four-way valve 4 is connected to the third end, and the second end is connected to the fourth end.

[0081] Based on the above embodiment, refer to Figure 6 The flow direction and status of the refrigerant in air conditioning circuit 1 are described as follows:

[0082] On the one hand, the high-temperature and high-pressure gaseous refrigerant flows out from the outlet end of the compressor 106, flows to the first external heat exchange unit through the first end-fourth end of the first four-way valve 3, defrosts the first external heat exchange unit, and is converted into liquid refrigerant. Then, it flows from the first external heat exchange unit through the fourth end-second end of the second four-way valve 4 and the third electronic expansion valve 103 to the battery heat exchange unit 5, absorbs heat through the battery heat exchange unit 5, and is converted into gaseous refrigerant.

[0083] On the other hand, the high-temperature and high-pressure gaseous refrigerant flows out from the outlet end of the compressor 106, flows to the in-vehicle heat exchange unit 6 through the second valve 110, and flows to the on-board hot water tank 112 through the first one-way valve 113. The refrigerant flowing out of the in-vehicle heat exchange unit 6 and the on-board hot water tank 112 flows to the second off-vehicle heat exchange unit through the first valve 109 and the third end-first end of the second four-way valve 4, defrosts the second off-vehicle heat exchange unit, converts it into liquid refrigerant, and then merges with the refrigerant on the above-mentioned side through the second electronic expansion valve 102.

[0084] The combined refrigerant flows through the first end to the third end of the first four-way valve 3 and the first electronic expansion valve 101 to the steam-water separator 105, and finally flows back to the compressor 106, and is then converted into a high-temperature and high-pressure gaseous refrigerant by the compressor 106.

[0085] It should be noted that in Figure 2-Figure 6 In the figure, the “D” marked on the first four-way valve 3 is the first end of the first four-way valve 3, the “C” marked on the first four-way valve 3 is the second end of the first four-way valve 3, the “E” marked on the first four-way valve 3 is the third end of the first four-way valve 3, and the “S” marked on the first four-way valve 3 is the fourth end of the first four-way valve 3. Similarly, the “D” marked on the second four-way valve 4 is the first end of the second four-way valve 4, the “C” marked on the second four-way valve 4 is the second end of the second four-way valve 4, the “E” marked on the second four-way valve 4 is the third end of the second four-way valve 4, and the “S” marked on the second four-way valve 4 is the fourth end of the second four-way valve 4.

[0086] In another aspect, an embodiment of the present application further provides a new energy vehicle, which includes the vehicle air-conditioning system described in any one of the above embodiments.

[0087] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0088] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A vehicle air conditioning system, characterized in that: The system includes a control module and an air conditioning circuit; The air conditioning circuit includes a first four-way valve, a second four-way valve, multiple electronic expansion valves, a battery heat exchange unit, and an in-vehicle heat exchange unit; the battery heat exchange unit is disposed in the vehicle battery compartment and is used to cool or heat the vehicle battery in the vehicle battery compartment; the in-vehicle heat exchange unit is disposed in the vehicle passenger compartment and is used to cool or heat the vehicle passenger compartment; the first four-way valve, the second four-way valve, and the multiple electronic expansion valves are used to control the flow direction of the refrigerant in the air conditioning circuit; The control module is respectively connected to the first four-way valve, the second four-way valve and the multiple electronic expansion valves. The control module is used to control the first four-way valve, the second four-way valve and the multiple electronic expansion valves, so that when the in-vehicle heat exchange unit heats the vehicle's driving and passenger compartment, the battery heat exchange unit heats the vehicle's battery compartment, and when the in-vehicle heat exchange unit cools the vehicle's driving and passenger compartment, the battery heat exchange unit cools the vehicle's battery compartment.

2. The system according to claim 1, wherein: The air conditioning circuit includes a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve and a fourth electronic expansion valve, and the air conditioning circuit also includes a steam-water separator, a compressor, a first off-vehicle heat exchange unit and a second off-vehicle heat exchange unit; The air outlet end of the steam-water separator is communicated with the air inlet end of the compressor, the air inlet end of the steam-water separator is respectively communicated with one end of the first electronic expansion valve and the first end of the in-vehicle heat exchange unit, the air outlet end of the compressor is respectively communicated with the first end of the first four-way valve and the second end of the in-vehicle heat exchange unit, and the second end of the first four-way valve is communicated with the other end of the first electronic expansion valve; The third end of the first four-way valve is respectively connected to one end of the battery heat exchange unit and one end of the second electronic expansion valve, the other end of the battery heat exchange unit is connected to one end of the third electronic expansion valve, and the other end of the third electronic expansion valve is connected to the second end of the second four-way valve; The fourth end of the first four-way valve is in communication with one end of the first off-board heat exchange unit, the other end of the first off-board heat exchange unit is in communication with the fourth end of the second four-way valve and one end of the fourth electronic expansion valve, and the other end of the fourth electronic expansion valve is in communication with one end of the second off-board heat exchange unit and the other end of the second electronic expansion valve. The other end of the second exterior heat exchange unit is communicated with the first end of the second four-way valve, and the third end of the second four-way valve is communicated with the third end of the interior heat exchange unit.

3. The system according to claim 2, characterized in that The air conditioning circuit further includes a first valve; One end of the first valve is communicated with one end of the third electronic expansion valve, and the other end of the first valve is communicated with the third end of the second four-way valve.

4. The system according to claim 2, wherein: The air conditioning circuit further includes a second valve; One end of the second valve is communicated with the air outlet end of the compressor, and the other end of the second valve is communicated with the second end of the in-vehicle heat exchange unit.

5. The system according to claim 2, wherein: The air conditioning circuit further includes a third valve; One end of the third valve is communicated with the air inlet end of the steam-water separator and one end of the first electronic expansion valve respectively, and the other end of the third valve is communicated with the first end of the in-vehicle heat exchange unit.

6. The system according to claim 3, wherein: The air conditioning circuit also includes an onboard hot water tank; One end of the vehicle hot water tank is respectively communicated with the first end of the in-vehicle heat exchanger and the second end of the in-vehicle heat exchanger, and the other end of the vehicle hot water tank is respectively communicated with one end of the third electronic expansion valve and one end of the first valve.

7. The system according to claim 6, characterized in that The air conditioning circuit further includes a first one-way valve and a second one-way valve; One end of the first one-way valve is connected to one end of the vehicle-mounted hot water tank, and the other end of the first one-way valve is connected to the second end of the vehicle-mounted heat exchange unit; the first one-way valve only allows the refrigerant to flow toward the vehicle-mounted hot water tank; One end of the second one-way valve is connected to one end of the vehicle-mounted hot water tank, and the other end of the first one-way valve is connected to the first end of the in-vehicle heat exchange unit; the second one-way valve only allows the refrigerant to flow in the opposite direction to the vehicle-mounted hot water tank.

8. The system according to claim 2, wherein: The control module controls the first electronic expansion valve, the third electronic expansion valve and the fourth electronic expansion valve to open, the second electronic expansion valve to close, the first end of the first four-way valve to be connected with the third end, and the second end to be connected with the fourth end, and the first end of the second four-way valve to be connected with the third end, and the second end to be connected with the fourth end, so that the in-vehicle heat exchange unit heats the vehicle's driver's compartment, and at the same time the battery heat exchange unit heats the vehicle's battery compartment.

9. The system according to claim 2, wherein: The control module controls the first electronic expansion valve, the third electronic expansion valve and the fourth electronic expansion valve to open, the second electronic expansion valve to close, the first end of the first four-way valve to be connected with the fourth end, and the second end to be connected with the third end, and the first end of the second four-way valve to be connected with the third end, so that the in-vehicle heat exchange unit cools the vehicle's driving compartment, and at the same time the battery heat exchange unit cools the vehicle's battery compartment.

10. A new energy vehicle, characterized in that: The new energy vehicle includes the vehicle air-conditioning system according to any one of claims 1 to 9.

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