Direct type heat pump system with two-core structure in air handling unit

Abstract

The utility model discloses a direct type heat pump system with a two-core structure in an air handling unit, and relates to the technical field of heat pump systems, the direct type heat pump system comprises an HVAC assembly and a three-in-one charging assembly of a vehicle WPTC, a battery pack and a motor controller, direct type heat pump upgrading can be carried out on the air handling unit (two cores) of a pure electric small vehicle type, a heat pump air conditioner is adopted, the heating efficiency is improved, and the service life of the air handling unit is prolonged. And the endurance mileage in winter can be greatly improved. And meanwhile, waste heat of an electric drive and a battery side can be effectively utilized, the utilization rate of energy is greatly improved, and the endurance mileage in winter can also be increased. The two core bodies (the evaporator and the indoor heat exchanger) in the cabin are free of high-pressure air heating PTC, and the risk that the high-pressure PTC enters the cabin can be eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat pump system, concretely relates to a direct heat pump system of two core body structures in air conditioner box. BACKGROUND

[0002] The automobile air conditioner heat pump system is a kind of high-efficiency energy conversion system, it can provide refrigeration and heating function for vehicle in different seasons. Generally in direct heat pump system, air conditioner is three core body structures: evaporator, indoor condenser, wind warm PTC, wind warm PTC effect is mainly used to heat under low temperature, but high pressure wind warm PTC, high voltage enters cabin, there is certain security risk. Small pure electric car air conditioner box is usually two core body structures, air conditioner is non-heat pump system, when heating in winter, heating efficiency is low, and endurance mileage drops seriously, there is certain endurance focus. But air conditioner box space is limited, cannot be directly changed into direct heat pump system. Simple direct heat pump system refrigerant side is relatively simple, but cannot make full use of motor and battery waste heat, lead to energy waste. If indirect heat pump system is used, then front cabin refrigerant side arrangement will be relatively complex much, and many small car front cabin space cannot meet the condition. SUMMARY

[0003] The utility model discloses a direct heat pump system of two core body structures in air conditioner box to overcome the above-mentioned defects in the prior art.

[0004] A direct heat pump system with a two-core structure inside an air conditioning unit includes an HVAC assembly, an automotive WPTC, a battery pack, and a three-in-one charging assembly for the motor controller. The inlet of the evaporator in the HVAC assembly is connected to the outlet of the outdoor condenser via valve one. The inlet of the outdoor condenser is connected to port A of the integrated indoor radiator in the HVAC assembly via valve two. The outlet of the outdoor condenser is connected to the inlet of a gas-liquid separator via valve three. The outlet of the evaporator is connected to the inlet of the gas-liquid separator. The outlet of the gas-liquid separator is connected to the inlet of the electric compressor. The outlet of the electric compressor is connected to port B of the integrated indoor radiator. Port C of the integrated indoor radiator is connected to port A of a four-way water valve. Port B of the four-way water valve is connected to the outlet of an electric water pump. The inlet of the electric water pump is connected to the outlet of the low-temperature radiator. The inlet of the low-temperature radiator is connected to port A of the three-way water valve one. Port B of the three-way water valve one is connected to the inlet of the electric water pump. Port C of the three-way water valve one is connected to the outlet of the drive motor. The inlet of the drive motor is connected to the outlet of the motor controller three-in-one charging assembly. The inlet of the motor controller three-in-one charging assembly is connected to port C of the four-way water valve. The outlet of the vehicle WPTC is connected to port D of the four-way water valve and the inlet of the battery pack. The outlet of the battery pack is connected to port A of the three-way water valve two. Port B of the three-way water valve two is connected to the inlet of the battery water pump. The outlet of the battery water pump is connected to the inlet of the vehicle WPTC. Port C of the three-way water valve two is connected to port D of the integrated radiator in the room.

[0005] Preferably, the first valve is an electronic expansion valve, and the second valve is a full-flow valve.

[0006] Preferably, the third valve is a solenoid valve.

[0007] Preferably, a cooling fan is provided at the low-temperature radiator.

[0008] The beneficial effects achieved by this utility model are as follows:

[0009] This application proposes a direct heat pump upgrade for the air conditioning unit (two cores) of pure electric mini-vehicles. Adopting a heat pump air conditioning system improves heating efficiency and significantly extends the driving range in winter. Simultaneously, it effectively utilizes waste heat from the electric drive and battery sides, greatly improving energy utilization and further extending the driving range in winter. The two cores inside the cabin (evaporator and interior heat exchanger) eliminate the need for high-pressure PTC heating, thus eliminating the risk of high-pressure PTC entering the cabin. Attached Figure Description

[0010] Figure 1 This is a system architecture diagram of the present invention.

[0011] Figure 2 This is a schematic diagram of the heat pump heating mode of this utility model.

[0012] Figure 3 This is a schematic diagram of the battery heating and motor waste heat of this utility model.

[0013] Figure 4 This is a schematic diagram of the simultaneous heating of the passenger compartment and the battery in this utility model.

[0014] In the diagram: 1. HVAC assembly; 11. Evaporator; 12. Indoor integrated radiator; 13. Valve 1; 2. Outdoor condenser; 21. Valve 2; 22. Valve 3; 3. Gas-liquid separator; 4. Electric compressor; 5. Four-way water valve; 6. Electric water pump; 7. Low-temperature radiator; 71. Cooling fan; 72. Three-way water valve 1; 8. Drive motor; 81. Motor controller three-in-one charging assembly; 9. Automotive WPTC; 10. Battery pack; 100. Three-way water valve 2; 101. Battery water pump. Detailed Implementation

[0015] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of this utility model, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the concept and technical solution of this utility model.

[0016] This utility model provides a direct heat pump system with a two-core structure inside an air conditioning unit, including an HVAC assembly 1, a vehicle-mounted WPTC9, a battery pack 10, and a three-in-one charging assembly 81 for a motor controller. The system is characterized in that: the inlet of the evaporator 11 inside the HVAC assembly 1 is connected to the outlet of the outdoor condenser 2 via valve 13; the inlet of the outdoor condenser 2 is connected to port A on the indoor integrated radiator 12 inside the HVAC assembly 1 via valve 21; and the outlet of the outdoor condenser 2 is connected to the inlet of the gas-liquid separator 3 via valve 32. The outlet of evaporator 11 is connected to the inlet of gas-liquid separator 3. The outlet of gas-liquid separator 3 is connected to the inlet of electric compressor 4. The outlet of electric compressor 4 is connected to port B of indoor integrated radiator 12. Port C of indoor integrated radiator 12 is connected to port A of four-way water valve 5. Port B of four-way water valve 5 is connected to the outlet of electric water pump 6. The inlet of electric water pump 6 is connected to the outlet of low temperature radiator 7. The inlet of low temperature radiator 7 is connected to port A of three-way water valve 72. A cooling fan 71 is provided at the low temperature radiator 7.

[0017] Port B of the three-way water valve 72 is connected to the inlet of the electric water pump 6, port C of the three-way water valve 72 is connected to the outlet of the drive motor 8, the inlet of the drive motor 8 is connected to the outlet of the motor controller three-in-one charging assembly 81, and the inlet of the motor controller three-in-one charging assembly 81 is connected to port C of the four-way water valve 5.

[0018] The outlet of the vehicle WPTC9 is connected to port D on the four-way water valve 5 and the inlet on the battery pack 10. The outlet of the battery pack 10 is connected to port A of the three-way water valve 2 100. Port B of the three-way water valve 2 100 is connected to the inlet on the battery water pump 101. The outlet of the battery water pump 101 is connected to the inlet of the vehicle WPTC9. Port C of the three-way water valve 2 100 is connected to port D on the indoor integrated radiator 12.

[0019] In addition, valve 13 is an electronic expansion valve, valve 21 is a full-flow valve, and valve 32 is a solenoid valve.

[0020] At work, such as Figure 1 As shown, the blue circulation pipe represents the refrigerant circuit operation, the green circulation pipe represents the battery + passenger compartment coolant circuit operation, and the orange circulation pipe represents the motor coolant circuit operation.

[0021] like Figure 2 As shown, the blue and orange circulation pipes are in heat pump heating mode (and can also be supplemented by the waste heat of the motor).

[0022] like Figure 3 As shown, the orange circulation pipe is for battery heating - motor waste heat mode;

[0023] like Figure 4 As shown, the blue and red circulation pipes are for simultaneous heating of the crew cabin and battery.

[0024] This application proposes a direct heat pump upgrade for the air conditioning unit (two cores) of pure electric mini-vehicles. Adopting a heat pump air conditioning system improves heating efficiency and significantly extends the driving range in winter. Simultaneously, it effectively utilizes waste heat from the electric drive and battery sides, greatly improving energy utilization and further extending the driving range in winter. The two cores inside the cabin (evaporator and interior heat exchanger) eliminate the need for high-pressure PTC heating, thus eliminating the risk of high-pressure PTC entering the cabin.

[0025] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A direct heat pump system with two-core structure inside an air conditioning box, comprising an HVAC assembly (1), a vehicle WPTC (9), a battery pack (10), and a motor controller three-in-one charging assembly (81), characterized in that: The inlet of the evaporator (11) in the HVAC assembly (1) is communicated with the outlet of the outdoor condenser (2) through a valve one (13), the inlet of the outdoor condenser (2) is communicated with the A port on the indoor integrated radiator (12) in the HVAC assembly (1) through a valve two (21), the outlet of the outdoor condenser (2) is communicated with the inlet of the gas-liquid separator (3) through a valve three (22), the outlet of the evaporator (11) is communicated with the inlet of the gas-liquid separator (3), the outlet of the gas-liquid separator (3) is communicated with the inlet of the electric compressor (4), the outlet of the electric compressor (4) is communicated with the B port on the indoor integrated radiator (12), the C port on the indoor integrated radiator (12) is communicated with the A port on the four-way water valve (5), the B port on the four-way water valve (5) is communicated with the outlet of the electric-driven water pump (6), the inlet of the electric-driven water pump (6) is communicated with the outlet of the low-temperature radiator (7), the inlet of the low-temperature radiator (7) is communicated with the A port of a three-way water valve one (72), the B port of the three-way water valve one (72) is communicated with the inlet of the electric-driven water pump (6), the C port of the three-way water valve one (72) is communicated with the outlet of the driving motor (8), the inlet of the driving motor (8) is communicated with the outlet of the motor controller three-in-one charging assembly (81), the inlet of the motor controller three-in-one charging assembly (81) is communicated with the C port on the four-way water valve (5), the outlet of the vehicle WPTC (9) is communicated with the D port on the four-way water valve (5) and the inlet of the battery pack (10), the outlet of the battery pack (10) is communicated with the A port of a three-way water valve two (100), the B port of the three-way water valve two (100) is communicated with the inlet of the battery water pump (101), the outlet of the battery water pump (101) is communicated with the inlet of the vehicle WPTC (9), and the C port of the three-way water valve two (100) is communicated with the D port on the indoor integrated radiator (12).

2. A direct-expansion heat pump system with two-core internal structure of an air handling unit as defined in claim 1, characterized in that: The valve one (13) is an electronic expansion valve, and the valve two (21) is a full-flow valve.

3. A direct-expansion heat pump system with two-core internal structure of an air handling unit as defined in claim 1, characterized in that: The valve three (22) is an electromagnetic valve.

4. A direct-expansion heat pump system with two-core internal structure of an air handling unit as defined in claim 1, characterized in that: The low-temperature radiator (7) is provided with a cooling fan (71).

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