Automobile and heat pump air conditioning system

Abstract

The present invention discloses a heat pump air conditioning system, comprising a first control valve and a second control valve; the first control valve cooperates with the second control valve to switch the on / off and connection states of the first branch, the second branch, the third branch, the fourth branch, the fifth branch, and the sixth branch. The heat pump air conditioning system of the present invention utilizes a motor water pump and an air conditioning water pump to ensure the normal operation of the system. Compared with the air conditioning system in the prior art, the number of water pumps is reduced, the energy consumption of the system is reduced, and the operating cost is saved; when the vehicle is running and only the power battery pack needs to be heated, the heat generated by the motor electronic control and the power supply can be directly introduced into the fourth branch using the first control valve and the second control valve to heat the power battery pack, fully recover the waste heat, and save energy. At the same time, the present invention also provides a car, comprising the above-mentioned heat pump air conditioning system, which can be applied to hybrid vehicles and electric vehicles, thereby improving the adaptability of the heat pump air conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles and their peripheral supporting facilities, in particular to an automobile and a heat pump air-conditioning system. Background Art

[0002] Heat pump air conditioners are air conditioning systems used in electric vehicles, effectively reducing energy consumption and increasing vehicle range. In existing technologies, heat pump air conditioners include direct heat pump systems and indirect heat pump systems.

[0003] Direct heat pump systems typically utilize a built-in condenser and electric PTC heater (PTC heater) within the air conditioning unit, along with an external water-heated PTC and condenser. These systems utilize refrigerant reversal to achieve compressor heating. Direct heat pump systems are incompatible with hybrid vehicle air conditioning units (water-heating core + evaporator), resulting in poor adaptability. Furthermore, they require the addition of a water PTC to heat the battery in extremely cold weather, increasing system energy consumption.

[0004] Most existing indirect heat pump systems use an external air-cooled condenser, and the motor and electronic control, battery pack, and air conditioning water pumps circulate separately. The indirect heat pump system requires three water pumps, which has high energy consumption and increases the cost of use. It is also impossible to directly recover the waste heat from the motor and electronic control, resulting in a waste of resources.

[0005] Therefore, how to change the current situation of high energy consumption of heat pump air conditioners in the existing technology has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an automobile and heat pump air conditioning system to solve the problems existing in the above-mentioned prior art, make full use of waste heat resources and reduce system energy consumption.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a heat pump air conditioning system, comprising:

[0008] a first control valve;

[0009] a second control valve, wherein the first control valve is connected to the second control valve via a connecting branch;

[0010] a first branch, wherein a motor water pump, a motor electronic control, and a power supply are provided on the first branch, and a first end of the first branch is connected to the first control valve;

[0011] a second branch, wherein a radiator is provided on the second branch, a first end of the radiator is connected to the second control valve, a second end of the second branch is connected to the second end of the first branch and then connected to the first control valve;

[0012] a third branch, wherein an air conditioning water pump is provided on the third branch, and a first end and a second end of the third branch are both connected to the first control valve;

[0013] a fourth branch, wherein a power battery pack is provided on the fourth branch, a first end of the fourth branch is connected to the first control valve, and a second end of the fourth branch is connected to the second control valve;

[0014] A communication circuit is provided with a heat exchanger, an evaporator, a compressor and a water-cooled condenser, wherein the tube side of the heat exchanger is arranged in parallel with the evaporator, and the two are connected in parallel with the shell side of the compressor and the water-cooled condenser to form the communication circuit;

[0015] a fifth branch, wherein the shell side of the heat exchanger is connected to the first control valve via the fifth branch, one end of the fifth branch is connected to the first control valve, and the other end of the fifth branch is connected to the second control valve;

[0016] a sixth branch, wherein a water heating core and a water heater are provided on the sixth branch, a pipe side of the water-cooled condenser is connected to the water heater and the water heating core, and both ends of the sixth branch are connected to the first control valve;

[0017] The first control valve cooperates with the second control valve to switch the on / off and connection states of the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch.

[0018] Preferably, the first control valve is an eight-way valve, and the second control valve is a five-way valve.

[0019] Preferably, a gas-liquid separator is further provided in the communication circuit, and after the heat exchanger and the evaporator are connected in parallel, the gas-liquid separator is used to connect to the compressor.

[0020] Preferably, a liquid storage tank is further provided in the communication circuit, and the liquid storage tank is connected to the water-cooled condenser.

[0021] Preferably, the heat exchanger and the evaporator are both connected to regulating valves.

[0022] Preferably, a detection element is further provided in the communication circuit.

[0023] Preferably, the water heater is a water PTC heater.

[0024] Preferably, the heat pump air-conditioning system further includes an expansion kettle, and the first branch, the second branch and the third branch are all connected to the expansion kettle.

[0025] Preferably, the heat pump air-conditioning system further includes a controller, and the first control valve, the second control valve, the first branch, the second branch, the third branch, the fourth branch, the connecting loop, the fifth branch and the sixth branch are all communicatively connected to the controller.

[0026] Preferably, when the first control valve cooperates with the second control valve to connect the first branch with the fifth branch and the sixth branch with the fourth branch, the heat pump air conditioning system is in a first state: the heat exchanger absorbs heat from the motor and the power supply, and the heat absorbed by the heat exchanger and the heat generated by the compressor are transferred to the water-cooled condenser, which heats the power battery pack and the water heater core;

[0027] When the first control valve cooperates with the second control valve to connect the second branch with the fifth branch and the sixth branch with the fourth branch, the heat pump air conditioning system is in a second state: the heat exchanger and the radiator absorb heat from the air, and the absorbed heat and the heat generated by the compressor are used to heat the power battery pack and the water heating core through the water-cooled condenser;

[0028] When the first control valve cooperates with the second control valve to connect the first branch with the fourth branch, the heat pump air conditioning system is in a third state: the heat generated by the motor and the power supply heats the power battery pack;

[0029] When the first control valve cooperates with the second control valve to connect the sixth branch with the fourth branch, the heat pump air conditioning system is in a fourth state: the water heater operates to heat the water heater core and the power battery pack;

[0030] The first control valve cooperates with the second control valve to connect the fourth branch with the fifth branch, and when the sixth branch is connected with the second branch, the heat pump air conditioning system is in a fifth state: the heat exchanger absorbs heat from the power battery pack, the evaporator absorbs heat from the passenger compartment, and the heat absorbed by the heat exchanger and the evaporator is transferred to the radiator through the water-cooled condenser to achieve heat dissipation;

[0031] When the first control valve cooperates with the second control valve to connect the fourth branch with the fifth branch, the heat pump air conditioning system is in a sixth state: the heat exchanger absorbs heat from the power battery pack, and the heat absorbed by the heat exchanger and the heat from the operation of the compressor are used to heat the water heating core through the water-cooled condenser;

[0032] The first control valve cooperates with the second control valve to connect the fourth branch with the sixth branch, and the heat pump air-conditioning system is in the seventh state: the compressor is running, the evaporator absorbs heat from the passenger compartment, and the heat absorbed by the evaporator and the heat generated by the work of the compressor are used to heat the power battery pack through the water-cooled condenser.

[0033] The present invention also provides an automobile comprising the above-mentioned heat pump air-conditioning system.

[0034] Compared with the prior art, the present invention has achieved the following technical effects: the heat pump air-conditioning system of the present invention includes a first control valve, a second control valve, a first branch, a second branch, a third branch, a fourth branch, a connecting loop, a fifth branch and a sixth branch, and the first control valve is connected to the second control valve by means of a connecting branch; a motor water pump, a motor electronic control and a power supply are provided on the first branch, and the first end of the first branch is connected to the first control valve; a radiator is provided on the second branch, and the first end of the radiator is connected to the second control valve, and the second end of the second branch is connected to the second end of the first branch and then to the first control valve; an air-conditioning water pump is provided on the third branch, and the first end and the second end of the third branch are both connected to the first control valve; a power battery pack is provided on the fourth branch, and the first end of the fourth branch is connected to the first control valve The first branch is connected to the second control valve, and the second end of the fourth branch is connected to the second control valve; a heat exchanger, an evaporator, a compressor and a water-cooled condenser are provided on the connecting loop, and the tube side of the heat exchanger is arranged in parallel with the evaporator, and the two are connected in parallel with the shell side of the compressor and the water-cooled condenser to form a connecting loop; the shell side of the heat exchanger is connected to the first control valve via the fifth branch, one end of the fifth branch is connected to the first control valve, and the other end of the fifth branch is connected to the second control valve; a water heating core and a water heater are provided on the sixth branch, and the tube side of the water-cooled condenser is connected to the water heater and the water heating core, and both ends of the sixth branch are connected to the first control valve; the first control valve cooperates with the second control valve to switch the on-off and connection states of the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch.

[0035] The heat pump air conditioning system of the present invention utilizes a motor water pump and an air conditioning water pump to ensure normal system operation. Compared to existing air conditioning systems, this reduces the number of water pumps, lowers system energy consumption, and saves operating costs. When the vehicle is operating and only the power battery pack requires heating, the heat generated by the motor electronic control and power supply can be directly directed into the fourth branch using the first and second control valves to heat the power battery pack, fully recovering waste heat and saving energy. The present invention also provides a vehicle incorporating the aforementioned heat pump air conditioning system. The heat pump air conditioning system is applicable to hybrid vehicles and electric vehicles, improving the adaptability of the heat pump air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 Schematic diagram of a heat pump air-conditioning system disclosed in an embodiment of the present invention.

[0038] Among them, 1 is the first control valve, 2 is the second control valve, 3 is the connecting branch, 4 is the first branch, 5 is the motor water pump, 6 is the motor electronic control, 7 is the power supply, 8 is the second branch, 9 is the radiator, 10 is the third branch, 11 is the air conditioning water pump, 12 is the fourth branch, 13 is the power battery pack, 14 is the connecting loop, 15 is the heat exchanger, 16 is the evaporator, 17 is the compressor, 18 is the water-cooled condenser, 19 is the fifth branch, 20 is the sixth branch, 21 is the water heating core, 22 is the water heater, 23 is the gas-liquid separator, 24 is the liquid storage tank, and 25 is the expansion kettle;

[0039] a, b, c, d, e, f, g, h, i, j, k, l, and m are the pipeline interfaces of the first control valve and the second control valve. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] The purpose of the present invention is to provide an automobile and heat pump air conditioning system to solve the problems existing in the above-mentioned prior art, make full use of waste heat resources and reduce system energy consumption.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The present invention provides a heat pump air-conditioning system, comprising a first control valve 1, a second control valve 2, a first branch 4, a second branch 8, a third branch 10, a fourth branch 12, a connecting loop 14, a fifth branch 19 and a sixth branch 20. The first control valve 1 is connected to the second control valve 2 by a connecting branch 3; the first branch 4 is provided with a motor water pump 5, a motor electronic control 6 and a power supply 7, and the first end of the first branch 4 is connected to the first control valve 1; the second branch 8 is provided with a radiator 9, the first end of the radiator 9 is connected to the second control valve 2, the second end of the second branch 8 is connected to the second end of the first branch 4 and then connected to the first control valve 1; the third branch 10 is provided with an air-conditioning water pump 11, and the first and second ends of the third branch 10 are both connected to the first control valve 1; the fourth branch 12 is provided with a power battery pack 13, the first end of the fourth branch 12 is connected to the first control valve 1, and the second end of the fourth branch 12 is connected to the second control valve The connecting loop 14 is provided with a heat exchanger 15, an evaporator 16, a compressor 17 and a water-cooled condenser 18. The tube side of the heat exchanger 15 is arranged in parallel with the evaporator 16, and the two are connected in parallel with the shell side of the compressor 17 and the water-cooled condenser 18 to form a connecting loop 14; the shell side of the heat exchanger 15 is connected to the first control valve 1 by the fifth branch 19, one end of the fifth branch 19 is connected to the first control valve 1, and the other end of the fifth branch 19 is connected to the second control valve 2; the sixth branch 20 is provided with a water heating core 21 and a water heater 22, the tube side of the water-cooled condenser 18 is connected to the water heater 22 and the water heating core 21, and both ends of the sixth branch 20 are connected to the first control valve 1; the first control valve 1 cooperates with the second control valve 2 to switch the on-off and connection states of the first branch 4, the second branch 8, the third branch 10, the fourth branch 12, the fifth branch 19 and the sixth branch 20.

[0044] When the heat pump air conditioning system of the present invention is working, it includes the following situations:

[0045] When the vehicle is running, the motor electronic control 6 and the power supply 7 generate heat, and the compressor 17 runs. The heat of the motor electronic control 6 and the power supply 7 is absorbed by the heat exchanger 15, and the absorbed heat and the heat generated by the work of the compressor 17 are transferred to the pipe process of the water-cooled condenser 18 through the water-cooled condenser 18. The direction is changed by the first control valve 1 and the second control valve 2, the radiator 9 is short-circuited, and the heated water is directed to the power battery pack 13 for heating, and then directed to the water heating core 21, and blown through the heated water heating core 21 by the blower to provide heat to the passenger compartment in the form of hot air.

[0046] When the vehicle stops, the motor electronic control 6 cannot generate heat, and the compressor 17 runs, absorbing heat from the air through the heat exchanger 15 and the radiator 9, and transferring the absorbed heat and the heat generated by the work of the compressor 17 to the pipe process of the water-cooled condenser 18 through the water-cooled condenser 18. The direction is changed by the first control valve 1 and the second control valve 2, and the heated water is directed to the power battery pack 13 for heating, and then to the water heating core 21, and is blown through the heated water heating core 21 by the blower to provide heat to the passenger compartment.

[0047] When the vehicle is running and only the power battery pack 13 needs to be heated, the heat generated by the motor electronic control 6 and the power supply 7 can be directly introduced into the power battery pack 13 to heat the battery, recover waste heat, and save energy.

[0048] In extremely cold weather, the heat pump air conditioning system cannot work, and the water heater 22 is used for heating. The direction is changed by the first control valve 1 and the second control valve 2. The passenger compartment is first heated through the water heating core 21, and then the battery is heated through the power battery pack 13.

[0049] Under normal temperature environment, the first control valve 1 proportionally adjusts the fluid flow through the radiator 9 to dissipate heat to the motor electronic control 6 and the power supply 7 in a timely manner, thereby ensuring the normal operation of the motor electronic control 6 and the power supply 7.

[0050] When the passenger compartment and the power battery pack 13 need to be cooled, the direction of the first control valve 1 and the second control valve 2 is changed, the compressor 17 starts, and the heat of the power battery pack 13 is absorbed through the heat exchanger 15 to cool the power battery pack 13. The heat of the passenger compartment is absorbed through the evaporator 16 to cool the passenger compartment, and the absorbed heat is transferred to the pipe process of the water-cooled condenser 18 through the water-cooled condenser 18, and all the heat is transferred to the air through the radiator 9.

[0051] When the passenger compartment needs to be heated and the power battery pack 13 needs to be cooled, the direction of the first control valve 1 and the second control valve 2 is changed, the compressor 17 runs, and the heat of the power battery pack 13 is absorbed through the heat exchanger 15 to cool the power battery pack 13. The absorbed heat is transferred to the pipe process of the water-cooled condenser 18 through the water-cooled condenser 18, and the heated water is introduced into the water heating core 21 to provide heat to the passenger compartment.

[0052] In other specific embodiments of the present invention, when the passenger compartment needs to be cooled and the power battery pack 13 needs to be heated, the direction of the first control valve 1 and the second control valve 2 is changed, the compressor 17 is operated, the air conditioning box heating and cooling doors are adjusted, and the heat of the passenger compartment is absorbed by the evaporator 16. The absorbed heat is introduced into the power battery pack 13 through the water-cooled condenser to heat the power battery pack 13.

[0053] In a low-temperature environment, after the vehicle is running and locked for charging, the temperature inside the passenger compartment is high, and the power battery pack 13 needs to be heated. The compressor 17 runs, absorbing the heat from the passenger compartment through the evaporator 16, and transferring the absorbed heat and the heat generated by the work of the compressor 17 to the pipe process of the water-cooled condenser 18 through the water-cooled condenser 18. The direction is changed by the first control valve 1 and the second control valve 2, and the heated water is directly introduced into the power battery pack 13 to heat it.

[0054] It should also be noted here that the tube side and shell side of the heat exchanger 15 and the water-cooled condenser 18 are two heat exchange channels for the heat exchange medium. In actual applications, the tube side or shell side can be selected as the heat exchange channel according to the specific types of the two heat exchange media.

[0055] In this embodiment, the first control valve 1 is an eight-way valve with eight pipeline interfaces, namely a, b, c, d, e, f, g, and h. The second control valve 2 is a five-way valve with five pipeline interfaces, namely i, j, k, l, and m. This facilitates control over the connection and on / off states of each branch and the connecting loop 14, thereby improving the controllability of the system. In actual applications, the appropriate control valve type can be selected according to the actual operating conditions to improve the flexibility and adaptability of the system.

[0056] Among them, a gas-liquid separator 23 is also provided in the connecting loop 14. After the heat exchanger 15 and the evaporator 16 are connected in parallel, they are connected to the compressor 17 via the gas-liquid separator 23. The gas-liquid separator 23 is provided before the compressor 17 to separate the liquid in the fluid, provide protection for the compressor 17, and improve the working reliability of the system.

[0057] At the same time, a liquid storage tank 24 is also provided in the communication loop 14 , and the liquid storage tank 24 is connected to the water-cooled condenser 18 . The liquid storage tank 24 can collect the liquid discharged from the water-cooled condenser 18 to ensure the normal operation of the communication loop 14 .

[0058] In order to control the working states of the heat exchanger 15 and the evaporator 16, the heat exchanger 15 and the evaporator 16 are both connected with regulating valves to further improve the controllability of the system.

[0059] In addition, a detection element is also provided in the communication loop 14 for monitoring the operating status of the system. An appropriate type of detection element can be selected according to actual conditions.

[0060] In practical applications, the water heater 22 may be a water PTC heater. The PTC heater has high heat exchange efficiency and can improve heating efficiency.

[0061] It should also be noted that the heat pump air-conditioning system of the present invention also includes an expansion kettle 25. The first branch 4, the second branch 8 and the third branch 10 are all connected to the expansion kettle 25. The provision of the expansion kettle 25 can stabilize the operating pressure of the system and improve the safety factor of the system. At the same time, it can also play a role in replenishing water for the system, further improving the adaptability of the system.

[0062] At the same time, the heat pump air-conditioning system of the present invention also includes a controller. The first control valve 1, the second control valve 2, the first branch 4, the second branch 8, the third branch 10, the fourth branch 12, the connecting loop 14, the fifth branch 19 and the sixth branch 20 are all communicatively connected to the controller. The controller is used to control the operating status of the system, thereby further improving the degree of automation of the system.

[0063] In actual application, when the controller controls the first control valve 1 and the second control valve 2 to connect the first branch 4 with the fifth branch 19 and the sixth branch 20 with the fourth branch 12, the heat pump air conditioning system is in the first state: the heat exchanger 15 absorbs heat from the motor and electronic control 6 and the power supply 7. The heat absorbed by the heat exchanger 15 and the heat generated by the work of the compressor 17 are transferred to the water-cooled condenser 18, which heats the power battery pack 13 and the water heating core 21.

[0064] When the first control valve 1 cooperates with the second control valve 2 to connect the second branch 8 with the fifth branch 19 and the sixth branch 20 with the fourth branch 12, the heat pump air conditioning system is in the second state: the heat exchanger 15 and the radiator 9 absorb heat from the air, and the absorbed heat and the heat generated by the work of the compressor 17 are used by the water-cooled condenser 18 to heat the power battery pack 13 and the water heating core 21;

[0065] When the first control valve 1 cooperates with the second control valve 2 to connect the first branch 4 with the fourth branch 12, the heat pump air conditioning system is in the third state: the heat generated by the motor electronic control 6 and the power supply 7 heats the power battery pack 13;

[0066] When the first control valve 1 cooperates with the second control valve 2 to connect the sixth branch 20 with the fourth branch 12, the heat pump air conditioning system is in the fourth state: the water heater 22 is working to heat the water heating core 21 and the power battery pack 13;

[0067] When the first control valve 1 cooperates with the second control valve 2 to connect the fourth branch 12 with the fifth branch 19 and the sixth branch 20 with the second branch 8, the heat pump air conditioning system is in the fifth state: the heat exchanger 15 absorbs heat from the power battery pack 13, and the evaporator 16 absorbs heat from the passenger compartment. The heat absorbed by the heat exchanger 15 and the evaporator 16 is transferred to the radiator 9 through the water-cooled condenser 18 to achieve heat dissipation;

[0068] When the first control valve 1 and the second control valve 2 cooperate to connect the fourth branch 12 with the fifth branch 19, the heat pump air conditioning system is in the sixth state: the heat exchanger 15 absorbs heat from the power battery pack 13. The heat absorbed by the heat exchanger 15 and the heat from the operation of the compressor 17 are heated by the water-cooled condenser 18 to heat the water heating core 21;

[0069] When the first control valve 1 cooperates with the second control valve 2 to connect the fourth branch 12 with the sixth branch 20, the heat pump air-conditioning system is in the seventh state: the compressor 17 is running, the evaporator 16 absorbs heat from the passenger compartment, and the heat absorbed by the evaporator 16 and the heat generated by the work of the compressor 17 are used to heat the power battery pack 13 through the water-cooled condenser 18.

[0070] The heat pump air-conditioning system of the present invention can realize independent heating of the passenger compartment, independent heating of the battery, and simultaneous heating of the passenger compartment and the battery through adjustment of the first control valve 1, the second control valve 2 and the heating and cooling air doors of the air-conditioning box; in addition, in actual applications, the electronic expansion valve can also be used to adjust the system operating parameters to realize independent cooling of the passenger compartment, independent cooling of the battery, and simultaneous cooling of the passenger compartment and the battery, further improving the adaptability of the system.

[0071] Furthermore, the present invention also provides a car, comprising the above-mentioned heat pump air-conditioning system. The heat pump air-conditioning system of the present invention can be applied to hybrid vehicles and electric vehicles, thereby improving the adaptability of the system. Compared with the prior art, the external air-cooled condenser and air heater are reduced, and two water pumps are used to ensure the operation of the system, thereby reducing the system operating cost and the cost of the entire vehicle. In addition, the present invention also utilizes the waste heat of the motor to heat the power battery pack 13, thereby recycling energy.

[0072] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A heat pump air conditioning system, characterized in that: include: a first control valve; a second control valve, wherein the first control valve is connected to the second control valve via a connecting branch; a first branch, wherein a motor water pump, a motor electronic control, and a power supply are provided on the first branch, and a first end of the first branch is connected to the first control valve; a second branch, wherein a radiator is provided on the second branch, a first end of the radiator is connected to the second control valve, a second end of the second branch is connected to the second end of the first branch and then connected to the first control valve; a third branch, wherein an air conditioning water pump is provided on the third branch, and a first end and a second end of the third branch are both connected to the first control valve; a fourth branch, wherein a power battery pack is provided on the fourth branch, a first end of the fourth branch is connected to the first control valve, and a second end of the fourth branch is connected to the second control valve; A communication circuit is provided with a heat exchanger, an evaporator, a compressor and a water-cooled condenser, wherein the tube side of the heat exchanger is arranged in parallel with the evaporator, and the two are connected in parallel with the shell side of the compressor and the water-cooled condenser to form the communication circuit; a fifth branch, wherein the shell side of the heat exchanger is connected to the first control valve via the fifth branch, one end of the fifth branch is connected to the first control valve, and the other end of the fifth branch is connected to the second control valve; a sixth branch, wherein a water heating core and a water heater are provided on the sixth branch, a pipe side of the water-cooled condenser is connected to the water heater and the water heating core, and both ends of the sixth branch are connected to the first control valve; The first control valve cooperates with the second control valve to switch the on / off and connection states of the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch.

2. The heat pump air conditioning system according to claim 1, characterized in that: The first control valve is an eight-way valve, and the second control valve is a five-way valve.

3. The heat pump air conditioning system according to claim 1, characterized in that: A gas-liquid separator is further provided in the communication circuit. After the heat exchanger and the evaporator are connected in parallel, the heat exchanger is connected to the compressor via the gas-liquid separator.

4. The heat pump air conditioning system according to claim 1, characterized in that: A liquid storage tank is also provided in the communication circuit, and the liquid storage tank is connected to the water-cooled condenser.

5. The heat pump air conditioning system according to claim 1, characterized in that: The heat exchanger and the evaporator are both connected with regulating valves.

6. The heat pump air conditioning system according to claim 1, characterized in that: A detection element is also provided in the communication circuit; and the water heater is a water PTC heater.

7. The heat pump air conditioning system according to any one of claims 1 to 6, characterized in that: An expansion water pot is also included, and the first branch, the second branch and the third branch are all connected to the expansion water pot.

8. The heat pump air conditioning system according to any one of claims 1 to 6, characterized in that: It also includes a controller, and the first control valve, the second control valve, the first branch, the second branch, the third branch, the fourth branch, the connecting loop, the fifth branch and the sixth branch are all communicatively connected to the controller.

9. The heat pump air conditioning system according to any one of claims 1 to 6, characterized in that: When the first control valve cooperates with the second control valve to connect the first branch with the fifth branch and the sixth branch with the fourth branch, the heat pump air conditioning system is in a first state: the heat exchanger absorbs heat from the motor and the power supply, and the heat absorbed by the heat exchanger and the heat generated by the compressor are transferred to the water-cooled condenser, which heats the power battery pack and the water heater core. When the first control valve cooperates with the second control valve to connect the second branch with the fifth branch and the sixth branch with the fourth branch, the heat pump air conditioning system is in a second state: the heat exchanger and the radiator absorb heat from the air, and the absorbed heat and the heat generated by the compressor are used to heat the power battery pack and the water heating core through the water-cooled condenser; When the first control valve cooperates with the second control valve to connect the first branch with the fourth branch, the heat pump air conditioning system is in a third state: the heat generated by the motor and the power supply heats the power battery pack; When the first control valve cooperates with the second control valve to connect the sixth branch with the fourth branch, the heat pump air conditioning system is in a fourth state: the water heater operates to heat the water heater core and the power battery pack; The first control valve cooperates with the second control valve to connect the fourth branch with the fifth branch, and when the sixth branch is connected with the second branch, the heat pump air conditioning system is in a fifth state: the heat exchanger absorbs heat from the power battery pack, the evaporator absorbs heat from the passenger compartment, and the heat absorbed by the heat exchanger and the evaporator is transferred to the radiator through the water-cooled condenser to achieve heat dissipation; When the first control valve cooperates with the second control valve to connect the fourth branch with the fifth branch, the heat pump air conditioning system is in a sixth state: the heat exchanger absorbs heat from the power battery pack, and the heat absorbed by the heat exchanger and the heat from the operation of the compressor are used to heat the water heating core through the water-cooled condenser; The first control valve cooperates with the second control valve to connect the fourth branch with the sixth branch, and the heat pump air-conditioning system is in the seventh state: the compressor is running, the evaporator absorbs heat from the passenger compartment, and the heat absorbed by the evaporator and the heat generated by the work of the compressor are used to heat the power battery pack through the water-cooled condenser.

10. An automobile, characterized in that: A heat pump air conditioning system comprising any one of claims 1 to 9.

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