Automobile air conditioning system with series-connected core bodies and integrated valve group

Abstract

The invention provides an automobile air conditioning system with serially connected cores and an integrated valve group, which comprises an agent-side integrated module and a liquid-side waterway system, and the agent-side integrated module is formed by sequentially connecting a compressor, a water-cooled condenser, an electronic expansion valve and a battery cooler to form a refrigerant loop; the liquid side waterway system is provided with an integrated valve group comprising a five-way valve and a six-way valve to switch a flow path, a water-cooling core body and a warm air core body are arranged in the air conditioner box body in series along the waterway direction, the water-cooling condenser and the battery cooler are respectively connected with the five-way valve and the six-way valve through interfaces, and the water tank, the water-cooling core body and the warm air core body are also connected into the valve group through corresponding ports. And a vehicle thermal management water path capable of being flexibly regulated and controlled is formed. The refrigerant loop is totally closed in the front cabin and is physically isolated from the passenger cabin, so that the potential safety hazard that the combustible refrigerant leaks into the automobile is fundamentally eliminated.

Description

Technical Field

[0001] This invention relates to the field of vehicle thermal management system technology, specifically to an automotive air conditioning system with a core in series and an integrated valve group, and more particularly to an R290 automotive air conditioning system with a core in series and an integrated valve group. Background Technology

[0002] As global climate change becomes increasingly severe, the automotive industry is accelerating its low-carbon transformation. The choice of refrigerant directly affects the vehicle's environmental impact. R290 (propane), as a natural refrigerant, has zero ozone depletion potential (ODP) and extremely low global warming potential (GWP), while also possessing excellent thermal properties and good compatibility with system materials. It is widely considered an ideal alternative refrigerant for next-generation automotive air conditioning systems.

[0003] However, the widespread application of R290 has always faced a core obstacle—flammability safety. Since R290 is a Class A3 flammable refrigerant, a leak into the passenger compartment could pose a safety hazard. Therefore, eliminating the risk of R290 entering the passenger compartment from the system architecture level has become a critical technical problem that urgently needs to be solved by those skilled in the art.

[0004] In existing technologies, to prevent R290 from entering the passenger compartment, a "secondary loop" solution is typically used. This means that the refrigerant circuit is entirely located in the forward compartment, and the cooling / heating is transferred to the air conditioning unit via the coolant circuit. However, existing solutions still have the following drawbacks: complex system structure, numerous valves; low space utilization; high cost; and limited heat exchange efficiency.

[0005] Therefore, there is an urgent need for an R290 automotive air conditioning system that is compact, easy to control, highly safe, and capable of switching between multiple modes.

[0006] Patent document CN120056697A discloses an automotive thermal management system based on R290 refrigerant. This patent document uses a combination of an eight-way water valve, a three-way heater valve, a three-way cooler valve, and a three-way motor valve to achieve multiple operating modes. However, the technical solution of this invention differs from that patent document. This invention uses a combination of a five-way valve and a six-way valve, which can be mass-produced using existing supply chains. The structure is clear and non-intersecting; the hot and cold piping operates independently, resulting in clearer control logic; the core's series layout optimizes heat exchange efficiency; and battery heating can be achieved through a water-to-water heat exchanger, facilitating water temperature control in the cabin and battery circuit.

[0007] Patent document CN220923755U discloses a vehicle and an automotive air conditioning system, including: an outlet of an electric compressor connected to a first inlet of a water-cooled condenser; a first outlet of the water-cooled condenser connected to an inlet of a desiccant reservoir; an inlet of a third electronic expansion valve connected to an outlet of the desiccant reservoir; a second end of a first three-way water valve connected to a second input end of a first five-way water valve; an outlet of a heater core connected to an inlet of a second water pump; a second output end of the first five-way water valve connected to an inlet of a cryogenic water tank; an outlet of the third water pump connected to an inlet of a battery; an outlet of the battery connected to a first input end of a second five-way water valve; and an outlet of a motor connected to a second input end of the second five-way water valve. However, this patent document still suffers from drawbacks such as a complex system structure and a large number of valves. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide an automotive air conditioning system with a core connected in series and an integrated valve assembly.

[0009] According to the present invention, an automotive air conditioning system with a core series connection and an integrated valve group includes: a refrigerant-side integrated module and a liquid-side water circuit system; The agent-side integrated module includes: a compressor, a water-cooled condenser, an electronic expansion valve, and a battery cooler; the first connection port of the compressor is connected to the first connection port of the water-cooled condenser, the second connection port of the water-cooled condenser is connected to the first connection port of the electronic expansion valve, the second connection port of the electronic expansion valve is connected to the first connection port of the battery cooler, and the second connection port of the battery cooler is connected to the second connection port of the compressor. The liquid-side water circuit system includes: an integrated valve group and an air conditioning unit; the integrated valve group includes a five-way valve and a six-way valve, and the integrated valve group is used to switch the flow path of the liquid-side water circuit system; a water-cooled core and a heating core are sequentially connected in series along the direction of cooling water flow inside the air conditioning unit. The third connection port of the water-cooled condenser can be connected to the fourth port of the six-way valve, the fifth port of the six-way valve can be connected to the first connection port of the water tank, the second connection port of the water tank can be connected to the first port of the five-way valve, and the second port of the five-way valve can be connected to the fourth connection port of the water-cooled condenser. The third connection port of the battery cooler can be connected to the fourth port of the five-way valve, the third port of the five-way valve can be connected to the first connection port of the water-cooled core, the second connection port of the water-cooled core can be connected to the first port of the six-way valve, the second port of the six-way valve can be connected to the first connection port of the heater core, the second connection port of the heater core can be connected to the third port of the six-way valve, and the sixth port of the six-way valve can be connected to the fourth connection port of the battery cooler.

[0010] Preferably, the liquid-side water circuit system further includes: a second water pump, a motor, an electric drive, and an electronic control system; The third connection port of the water-cooled condenser is connected to the first connection port of the second water pump, and the second connection port of the second water pump is connected to the fourth port of the six-way valve. The fifth port of the six-way valve is connected to the first connection port of the motor, the second connection port of the motor is connected to the first connection port of the electric drive, the second connection port of the electric drive is connected to the first connection port of the electric control, and the second connection port of the electric control is connected to the first connection port of the water tank.

[0011] Preferably, the liquid-side water circuit system further includes: a first water pump, a first three-way water valve, a second three-way water valve, a third three-way water valve, a water-to-water heat exchanger, and a water heater; The third connection port of the battery cooler is connected to the fourth port of the five-way valve; The third port of the five-way valve is connected to the first connection port of the second three-way water valve, and the second connection port of the second three-way water valve is connected to the first connection port of the water-cooled core; the second connection port of the water-cooled core is connected to the first port of the six-way valve. The third connection port of the second three-way water valve is connected to the first connection port of the water-to-water heat exchanger, and the second connection port of the water-to-water heat exchanger is connected to the first connection port of the third three-way water valve. The third connection port of the water-to-water heat exchanger is connected to the first connection port of the third water pump, the second connection port of the third water pump is connected to the first connection port of the battery, and the fourth connection port of the water-to-water heat exchanger is connected to the second connection port of the battery. The second connection port of the third three-way water valve is connected to the third port of the six-way valve, and the third connection port of the third three-way water valve is connected to the second connection port of the heater core. The first connection port of the first three-way water valve is connected to the second port of the six-way valve, the second connection port of the first three-way water valve is connected to the first connection port of the heater core, and the third connection port of the first three-way water valve is connected to the fifth port of the five-way valve. The fourth connection port of the battery cooler is connected to the first connection port of the first water pump, and the second connection port of the first water pump is connected to the sixth port of the six-way valve.

[0012] Preferably, the liquid-side water circuit system further includes: an expansion tank, a first two-way water valve, and a second two-way water valve; The expansion kettle is connected to the second connection port of the water tank; The second connection port of the water tank is connected to the first port of the five-way valve through the first connection pipe; the fourth port of the five-way valve is connected to the third connection port of the battery cooler through the second connection pipe. The first connection port of the first two-way water valve is connected to the first connecting pipeline, and the second connection port of the first two-way water valve is connected to the second connecting pipeline; The second connection port of the water-cooled core is connected to the first port of the six-way valve through a third connection pipe, and the fifth port of the six-way valve is connected to the first connection port of the motor through a fourth connection pipe. The first connection port of the second two-way water valve is connected to the third connection pipe, and the second connection port of the second two-way water valve is connected to the fourth connection pipe.

[0013] Preferably, a pressure sensor is installed on the connecting pipe between the first connection port of the compressor and the first connection port of the water-cooled condenser; A temperature and pressure sensor is installed on the connecting pipe between the second connection port of the battery cooler and the second connection port of the compressor. A temperature sensor is installed on the second connecting pipe; a temperature sensor is installed on the fourth connecting pipe; A temperature sensor is installed on the connecting pipe between the second connection port of the third water pump and the first connection port of the battery. A temperature sensor is installed on the connecting pipe between the fourth connection port of the water-to-water heat exchanger and the second connection port of the battery.

[0014] Preferably, when operating in cabin cooling mode: The refrigerant flows sequentially through the compressor, the water-cooled condenser, the electronic expansion valve, and the battery cooler, and then flows back to the compressor from the battery cooler. The coolant flows from the water-cooled condenser to the second water pump, then from the second water pump to the fourth port of the six-way water valve, then through the internal core of the six-way water valve to the fifth port of the six-way water valve, then from the fifth port of the six-way water valve, passing sequentially through the motor, the electric drive, and the electronic control system into the water tank, then from the water tank to the first port of the five-way water valve, then through the internal core of the five-way water valve to the fourth port of the five-way water valve, and finally from the fourth port of the five-way water valve back to the water-cooled condenser. The coolant flows from the battery cooler to the fourth port of the five-way water valve, then flows through the internal core of the five-way water valve to the third port, then flows out from the third port of the five-way water valve and into the water-cooling core via the second three-way water valve, then flows out from the water-cooling core to the first port of the six-way water valve, then flows through the internal core of the six-way water valve to the second port, then flows out from the second port of the six-way water valve and into the heater core via the first three-way water valve, then flows out from the heater core and into the third port of the six-way water valve via the third three-way water valve, then flows through the internal core of the six-way water valve to the sixth port, and finally flows out from the sixth port of the six-way water valve and back to the battery cooler via the first water pump.

[0015] Preferably, when running in battery cooling mode: The refrigerant flows sequentially through the compressor, the water-cooled condenser, the electronic expansion valve, and the battery cooler, and then flows back to the compressor from the battery cooler. The coolant flows from the water-cooled condenser to the second water pump, then from the second water pump to the fourth port of the six-way water valve, then through the internal core of the six-way water valve to the fifth port of the six-way water valve, then from the fifth port of the six-way water valve, flowing sequentially through the motor, the electric drive, and the electronic control system into the water tank, then from the water tank to the first port of the five-way water valve, then through the internal core of the five-way water valve to the fourth port of the five-way water valve, and finally from the fourth port of the five-way water valve back into the water-cooled condenser. The coolant flows from the battery cooler to the fourth port of the five-way water valve, then flows through the internal core of the five-way water valve to the third port of the five-way water valve, flows out from the third port of the five-way water valve, flows into the water-to-water heat exchanger through the second three-way water valve, flows out from the water-to-water heat exchanger, flows into the third port of the six-way water valve through the third three-way water valve, then flows through the internal core of the six-way water valve to the sixth port of the six-way water valve, flows out from the sixth port of the six-way water valve, and flows back to the battery cooler via the first water pump. The coolant in the battery flows into the water-to-water heat exchanger, flows out of the water-to-water heat exchanger, and returns to the battery via the third water pump.

[0016] Preferably, when the cabin heating mode is running: The refrigerant flows sequentially through the compressor, the water-cooled condenser, the electronic expansion valve, and the battery cooler, and then flows back to the compressor from the battery cooler. Coolant flows from the water-cooled condenser to the second water pump, then from the second water pump to the fourth port of the six-way water valve, then through the internal core of the six-way water valve to the third port of the six-way water valve, then from the third port of the six-way water valve to the heater core via the third three-way water valve, then from the heater core to the second port of the six-way water valve via the first three-way water valve, then through the internal core of the six-way water valve to the first port of the six-way water valve, then from the first port of the six-way water valve to the water-cooled core, then from the water-cooled core to the third port of the five-way water valve via the second three-way water valve, then through the internal core of the five-way water valve to the second port of the five-way water valve, and finally from the second port of the five-way water valve back to the water-cooled condenser. The coolant flows from the battery cooler to the fourth port of the five-way water valve, then flows through the internal core of the five-way water valve to the first port of the five-way water valve, flows out from the first port of the five-way water valve, and flows sequentially through the water tank, the electronic control unit, the electric drive, and the motor into the fifth port of the six-way water valve, then flows through the internal core of the six-way water valve to the sixth port of the six-way water valve, and flows out from the sixth port of the six-way water valve and returns to the battery cooler via the first water pump.

[0017] Preferably, when operating in battery heating mode: The refrigerant flows sequentially through the compressor, the water-cooled condenser, the electronic expansion valve, and the battery cooler, and then flows back to the compressor from the battery cooler. The coolant flows from the water-cooled condenser to the second water pump, then from the second water pump to the fourth port of the six-way water valve, then through the internal core of the six-way water valve to the third port of the six-way water valve, then from the third port of the six-way water valve through the third three-way water valve into the water-to-water heat exchanger, then from the water-to-water heat exchanger to the water heater, then from the water heater through the second three-way water valve into the third port of the five-way water valve, then through the internal core of the five-way water valve to the second port of the five-way water valve, and finally from the second port of the five-way water valve back into the water-cooled condenser. The coolant in the battery flows to the water-to-water heat exchanger for heat exchange, and then flows out of the water-to-water heat exchanger and back to the battery via the third water pump.

[0018] Preferably, when operating the cabin dehumidification mode: The refrigerant flows sequentially through the compressor, the water-cooled condenser, the electronic expansion valve, and the battery cooler, and then flows back to the compressor from the battery cooler. Coolant flows from the water-cooled condenser to the second water pump, then from the second water pump to the fourth port of the six-way water valve, then through the internal core of the six-way water valve to the third port of the six-way water valve, then from the third port of the six-way water valve to the heater core via the third three-way water valve, then from the heater core to the fifth port of the five-way water valve via the first three-way water valve, then through the internal core of the five-way water valve to the second port of the five-way water valve, and finally from the second port of the five-way water valve back to the water-cooled condenser. The coolant flows from the battery cooler to the fourth port of the five-way water valve, then flows through the internal core of the five-way water valve to the third port of the five-way water valve, flows out from the third port of the five-way water valve and flows into the water-cooling core through the second three-way water valve, flows out from the water-cooling core and flows into the fifth port of the six-way water valve through the second two-way water valve, then flows through the internal core of the six-way water valve to the sixth port of the six-way water valve, and flows out from the sixth port of the six-way water valve and returns to the battery cooler via the first water pump.

[0019] Preferably, the refrigerant-side integrated module and the liquid-side water circuit module form a refrigerant circuit and a coolant circuit; the refrigerant circuit uses R290 as the refrigerant, and the refrigerant circuit is arranged in a fully enclosed manner in the front compartment of the vehicle.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention has higher safety. The R290 refrigerant circuit is completely sealed in the front compartment and physically isolated from the passenger compartment, which fundamentally eliminates the safety hazard of flammable refrigerant leaking into the vehicle.

[0021] 2. The system integration of the present invention is significantly improved. It adopts an integrated valve group composed of a five-way valve and a six-way valve to replace the complex combination of multiple three-way valves in the prior art. The number of valves is reduced by more than 40%, and the number of pipeline connection points is reduced by more than 50%, making the water system simpler and more compact, and the control logic clearer.

[0022] 3. The present invention has a high space utilization rate. The cold air core and the warm air core in the air conditioning unit are arranged in series along the cooling water flow direction. Compared with the traditional parallel layout, the axial dimension is shortened by more than 30%, freeing up more space for the passenger compartment.

[0023] 4. The present invention enhances heat exchange efficiency, and the water circulation driven by three independent water pumps reduces mutual interference between hot and cold media and improves energy transfer efficiency.

[0024] 5. The present invention has strong functional expandability. The integrated valve group design is naturally adapted to various thermal management functions such as battery cooling and motor waste heat recovery. Multiple modes can be flexibly combined through simple valve core switching, which helps to improve the energy efficiency of the whole vehicle and extend the driving range by more than 10%.

[0025] 6. The present invention has obvious cost advantages. The number of valves is reduced, the pipeline is simplified, and the requirements of the control unit are reduced, so the manufacturing cost and maintenance cost of the present invention are lower than those of the existing complex secondary circuit schemes, which is conducive to the commercial promotion of R290 technology. Attached Figure Description

[0026] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A schematic diagram of the basic structure of the R290 automotive air conditioning system provided by the present invention; Figure 2 This is a schematic diagram of the five-way valve and six-way valve mode switching provided by the present invention.

[0027] The diagram shows: 1. Compressor; 2. Water-cooled condenser; 3. Electronic expansion valve; 4. Battery cooler; 5. First water pump; 6. Second water pump; 7. Third water pump; 8. Heater core; 9. Water-cooled core; 10. Battery; 11. Motor; 12. Electric drive; 13. Electronic control; 14. Water tank; 15. Expansion tank; 16. Five-way valve; 17. Six-way valve; 18. First three-way water valve; 19. Second three-way water valve; 20. Third three-way water valve; 21. First two-way water valve; 22. Water-to-water heat exchanger; 23. Water heater; 24. Second two-way water valve. Detailed Implementation

[0028] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0029] Example This embodiment provides an R290 automotive air conditioning system with a core series connection and an integrated valve group. This system is a secondary loop system, including a refrigerant-side integrated module and a liquid-side water circuit system. Heat exchange between the refrigerant side and the liquid side is completed in the heat exchanger through refrigerant and coolant.

[0030] The refrigerant-side integrated module includes a compressor, a water-cooled condenser, an electronic expansion valve, and a battery cooler. These components are connected through refrigerant pipelines to form a refrigerant circulation module. The entire refrigerant-side circulation module is located entirely within the vehicle's front compartment, ensuring that R290 refrigerant does not enter the passenger compartment and achieving physical isolation to ensure safety.

[0031] The outlet of the compressor 1 is connected to the inlet of the water-cooled condenser 2, the outlet of the water-cooled condenser 2 is connected to the inlet of the electronic expansion valve 3, the outlet of the electronic expansion valve 3 is connected to the inlet of the battery cooler 4, and the outlet of the battery cooler 4 is connected to the inlet of the compressor.

[0032] The water-cooled condenser in the refrigerant-side integrated module is used to transfer heat from the refrigerant to the coolant circuit. This component integrates a liquid storage tank to realize the system's liquid storage function and participate in the system's refrigerant cycle.

[0033] The air conditioning unit contains a water-cooled core 9 and a heating core 8 connected in series along the cooling water flow direction, forming a series core assembly. Compared to traditional parallel or independent configurations, this series layout significantly reduces the axial dimension of the air conditioning unit, improves the utilization of the front compartment space, and increases the heat exchange area of ​​the core, thereby improving the system's heat exchange efficiency. The water-cooled core 9 is a water-cooled evaporator.

[0034] The five-way valve 16 and six-way valve 17 in the system replace the complex combination of multiple three-way and four-way valves in the prior art. Through the rotation and combination of the internal valve cores, multiple modes such as cooling, heating, dehumidification, battery cooling, and waste heat recovery can be switched. This integrated valve assembly design significantly reduces the number of valves and pipe connection points, making the water system simpler, more compact, and the control logic clearer.

[0035] The system is equipped with three independent water pumps, which drive the heating core circuit, the cooling core circuit, and the battery cooling circuit respectively, reducing mutual interference between hot and cold media and improving energy transmission efficiency and control accuracy.

[0036] When the cabin cooling mode is running, the refrigerant in the system flows from compressor 1 to water-cooled condenser 2 to electronic expansion valve 3 to battery cooler 4 and back to compressor; the coolant flows from water-cooled condenser 2 to the second water pump 6 to the fourth port of six-way water valve 17, then through the internal core of the six-way water valve to the fifth port to motor 11 to electric drive 12 to electronic control 13 to water tank 14 and back to water-cooled condenser; the coolant flows from battery cooler 4 to the fourth port of five-way water valve 16, then through the internal core of the five-way water valve to the third port to the second three-way water valve 19 to water-cooled core 9 to the first port of six-way water valve 17, then through the internal core of the six-way water valve to the second port to the first three-way water valve 18 to heater core 8 to the third three-way water valve 20 to the third port of six-way water valve 17, then through the internal core of the six-way water valve to the sixth port to the first water pump 5 and back to battery cooler.

[0037] When operating in battery cooling mode, the refrigerant flow within the system is from compressor 1 to water-cooled condenser 2 to electronic expansion valve 3 to battery cooler 4 and back to compressor; coolant flows from water-cooled condenser 2 to the second water pump 6 to the fourth port of six-way water valve 17, then through the internal core of the six-way water valve to the fifth port to motor 11 to electric drive 12 to electronic control 13 to water tank 14 and back to water-cooled condenser; coolant flows from battery cooler 4 to the fourth port of five-way water valve 16, then through the internal core of the five-way water valve to the third port to the second three-way water valve 19 to water-to-water heat exchanger 22 to the third three-way water valve 20 to the third port of six-way water valve 17, then through the internal core of the six-way water valve to the sixth port to the first water pump 5 and back to battery cooler; coolant in battery 10 flows to water-to-water heat exchanger 22 to the third water pump 7 and back to battery.

[0038] When the cabin heating mode is running, the refrigerant flow within the system is from compressor 1 to water-cooled condenser 2 to electronic expansion valve 3 to battery cooler 4 and back to compressor; the coolant flows from water-cooled condenser 2 to the second water pump 6 to the fourth port of six-way water valve 17, then through the internal core of the six-way water valve to the third port to the third three-way water valve 20 to the heater core 8 to the first three-way water valve 18 to the second port of six-way water valve 17, then through the internal core of the six-way water valve to the first port to the water... The coolant flows from the cold core 9 to the third port of the second three-way water valve 19 to the fifth port of the five-way water valve 16, then through the internal core of the five-way water valve, it flows to the second port and back to the water-cooled condenser; the coolant flows from the battery cooler 4 to the fourth port of the five-way water valve 16, then through the internal core of the five-way water valve, it flows to the first port to the water tank 14 to the electronic control 13 to the electric drive 12 to the motor 11 to the fifth port of the six-way water valve 17, then through the internal core of the six-way water valve, it flows to the sixth port to the first water pump 5 and back to the battery cooler.

[0039] When the battery heating mode is running, the refrigerant in the system flows from compressor 1 to water-cooled condenser 2 to electronic expansion valve 3 to battery cooler 4 and back to compressor; the coolant flows from water-cooled condenser 2 to the second water pump 6 to the fourth port of six-way water valve 17, then through the internal core of the six-way water valve to the third port to the third three-way water valve 20 to the water-to-water heat exchanger 22 to the water heater 23 to the second three-way water valve 19 to the third port of five-way water valve 16, then through the internal core of the five-way water valve to the second port and back to the water-cooled condenser; the coolant in battery 10 flows to water-to-water heat exchanger 22 for heat exchange, then to the third water pump 7 and back to battery.

[0040] When the cabin dehumidification mode is running, the refrigerant flow in the system is from compressor 1 to water-cooled condenser 2 to electronic expansion valve 3 to battery cooler 4 and back to compressor; the coolant flows from water-cooled condenser 2 to the second water pump 6 to the fourth port of six-way water valve 17, then through the internal core of the six-way water valve to the third port to the third three-way water valve 20 to the heater core 8 to the first three-way water valve 18 to the fifth port of five-way water valve 16, then through the internal core of the five-way water valve to the second port and back to the water-cooled condenser; the coolant flows from battery cooler 4 to the fourth port of five-way water valve 16, then through the internal core of the five-way water valve to the third port to the second three-way water valve 19 to the water-cooled core 9 to the two-way water valve 22 to the fifth port of six-way water valve 17, then through the internal core of the six-way water valve to the sixth port to the first water pump 5 and back to the battery cooler.

[0041] This embodiment can achieve multiple sets of combined operating conditions by combining different single car air conditioning circulation modes, thereby realizing the diversity of the system, taking into account multiple operating modes, and meeting the needs of different customers.

[0042] like Figure 1 As shown, in the R290 automotive air conditioning system with core series connection and integrated valve group, the refrigerant-side integrated module includes a compressor, water-cooled condenser, electronic expansion valve and battery cooler. The entire refrigerant circuit is arranged in the front compartment to ensure that R290 does not enter the passenger compartment.

[0043] The coolant circuit includes components such as a water pump, a three-way valve, a five-way valve, a six-way valve, an outdoor radiator, a heater core, a cooler core, a two-way valve, and a kettle. Seamless switching between various thermal management modes can be achieved through the rotational combination of the internal valve cores of the five-way and six-way valves.

[0044] Inside the air conditioning unit, the cold air core and the heating air core are arranged in series along the direction of cooling water flow. This increases the heat exchange area of ​​the cores during cooling and heating, thereby improving heat exchange efficiency. Compared to the traditional parallel arrangement, this structure significantly reduces the axial dimension of the air conditioning unit, enhancing the flexibility of the overall vehicle layout.

[0045] In terms of control strategy, the electronic expansion valve, water pump and integrated valve group are controlled in a coordinated manner through the vehicle control unit (VCU) or thermal management controller (TMC). The operating mode can be intelligently switched according to the temperature requirements of the passenger compartment, the temperature status of the battery, the residual heat of the motor, etc., to achieve optimal energy efficiency.

[0046] This system adopts a modular design, with components connected via standardized interfaces, facilitating vehicle integration and maintenance. During manufacturing, the refrigerant circuit employs a high-sealing welding process to ensure no leaks; the coolant circuit uses quick-connect fittings to improve assembly efficiency.

[0047] This embodiment provides an R290 automotive air conditioning system based on core series connection and integrated valve group, which solves the following technical problems: a) Safety issues: completely avoids the possibility of R290 refrigerant entering the passenger compartment, achieving physical isolation; b) Low system integration: reduces the number of valves and pipe connection points, improving system compactness and reliability; c) Low space utilization: reduces the axial dimension of the air conditioning unit through core series connection layout; d) Poor functional expandability: enables flexible switching between multiple thermal management modes such as cooling, heating, dehumidification, battery cooling, and waste heat recovery; e) Difficulty in cost control: reduces system manufacturing and maintenance costs, promoting the commercial application of R290 technology.

[0048] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An automotive air conditioning system with a core in series and an integrated valve assembly, characterized in that, include: Agent-side integrated module and liquid-side water circuit system; The agent-side integrated module includes: a compressor (1), a water-cooled condenser (2), an electronic expansion valve (3), and a battery cooler (4); the first connection port of the compressor (1) is connected to the first connection port of the water-cooled condenser (2), the second connection port of the water-cooled condenser (2) is connected to the first connection port of the electronic expansion valve (3), the second connection port of the electronic expansion valve (3) is connected to the first connection port of the battery cooler (4), and the second connection port of the battery cooler (4) is connected to the second connection port of the compressor (1); The liquid-side water circuit system includes: a warm air core (8), a water-cooled core (9), a five-way valve (16), a six-way valve (17), and a water tank (14). The third connection port of the water-cooled condenser (2) can be connected to the fourth port of the six-way valve (17), the fifth port of the six-way valve (17) can be connected to the first connection port of the water tank (14), the second connection port of the water tank (14) can be connected to the first port of the five-way valve (16), and the second port of the five-way valve (16) can be connected to the fourth connection port of the water-cooled condenser (2). The third connection port of the battery cooler (4) can be connected to the fourth port of the five-way valve (16), the third port of the five-way valve (16) can be connected to the first connection port of the water-cooled core (9), the second connection port of the water-cooled core (9) can be connected to the first port of the six-way valve (17), the second port of the six-way valve (17) can be connected to the first connection port of the heater core (8), the second connection port of the heater core (8) can be connected to the third port of the six-way valve (17), and the sixth port of the six-way valve (17) can be connected to the fourth connection port of the battery cooler (4).

2. The automotive air conditioning system with a core series connection and integrated valve group according to claim 1, characterized in that, The liquid-side water circuit system also includes: a second water pump (6), a motor (11), an electric drive (12), and an electronic control (13). The third connection port of the water-cooled condenser (2) is connected to the first connection port of the second water pump (6), and the second connection port of the second water pump (6) is connected to the fourth port of the six-way valve (17). The fifth port of the six-way valve (17) is connected to the first connection port of the motor (11), the second connection port of the motor (11) is connected to the first connection port of the electric drive (12), the second connection port of the electric drive (12) is connected to the first connection port of the electric control (13), and the second connection port of the electric control (13) is connected to the first connection port of the water tank (14).

3. The automotive air conditioning system with a core series connection and integrated valve group according to claim 2, characterized in that, The liquid-side water circuit system also includes: a first water pump (5), a first three-way water valve (18), a second three-way water valve (19), a third three-way water valve (20), a water-to-water heat exchanger (22), and a water heater (23); The third connection port of the battery cooler (4) is connected to the fourth port of the five-way valve (16); The third port of the five-way valve (16) is connected to the first connection port of the second three-way water valve (19), and the second connection port of the second three-way water valve (19) is connected to the first connection port of the water-cooled core (9); the second connection port of the water-cooled core (9) is connected to the first port of the six-way valve (17). The third connection port of the second three-way water valve (19) is connected to the first connection port of the water-to-water heat exchanger (22), and the second connection port of the water-to-water heat exchanger (22) is connected to the first connection port of the third three-way water valve (20). The third connection port of the water-to-water heat exchanger (22) is connected to the first connection port of the third water pump (7), the second connection port of the third water pump (7) is connected to the first connection port of the battery (10), and the fourth connection port of the water-to-water heat exchanger (22) is connected to the second connection port of the battery (10). The second connection port of the third three-way water valve (20) is connected to the third port of the six-way valve (17), and the third connection port of the third three-way water valve (20) is connected to the second connection port of the warm air core (8). The first connection port of the first three-way water valve (18) is connected to the second port of the six-way valve (17), the second connection port of the first three-way water valve (18) is connected to the first connection port of the warm air core (8), and the third connection port of the first three-way water valve (18) is connected to the fifth port of the five-way valve (16). The fourth connection port of the battery cooler (4) is connected to the first connection port of the first water pump (5), and the second connection port of the first water pump (5) is connected to the sixth port of the six-way valve (17).

4. The automotive air conditioning system with core series connection and integrated valve group according to claim 3, characterized in that, The liquid-side water circuit system also includes: an expansion tank (15), a first two-way water valve (21), and a second two-way water valve (24). The expansion kettle (15) is connected to the second connection port of the water tank (14); The second connection port of the water tank (14) is connected to the first port of the five-way valve (16) through the first connection pipe; the fourth port of the five-way valve (16) is connected to the third connection port of the battery cooler (4) through the second connection pipe. The first connection port of the first two-way water valve (21) is connected to the first connecting pipeline, and the second connection port of the first two-way water valve (21) is connected to the second connecting pipeline; The second connection port of the water-cooled core (9) is connected to the first port of the six-way valve (17) through the third connection pipe, and the fifth port of the six-way valve (17) is connected to the first connection port of the motor (11) through the fourth connection pipe. The first connection port of the second two-way water valve (24) is connected to the third connection pipeline, and the second connection port of the second two-way water valve (24) is connected to the fourth connection pipeline.

5. The automotive air conditioning system with core series connection and integrated valve group according to claim 3, characterized in that, A pressure sensor is installed on the connecting pipe between the first connection port of the compressor (1) and the first connection port of the water-cooled condenser (2); A temperature and pressure sensor is installed on the connecting pipe between the second connection port of the battery cooler (4) and the second connection port of the compressor (1); A temperature sensor is installed on the second connecting pipe; a temperature sensor is installed on the fourth connecting pipe; A temperature sensor is installed on the connecting pipe between the second connection port of the third water pump (7) and the first connection port of the battery (10); A temperature sensor is installed on the connecting pipe between the fourth connection port of the water-to-water heat exchanger (22) and the second connection port of the battery (10).

6. The automotive air conditioning system with core series connection and integrated valve group according to claim 3, characterized in that, When the cabin cooling mode is running: The refrigerant flows sequentially through the compressor (1), the water-cooled condenser (2), the electronic expansion valve (3), and the battery cooler (4), and then flows back to the compressor (1) from the battery cooler (4); Coolant flows from the water-cooled condenser (2) to the second water pump (6), from the second water pump (6) to the fourth port of the six-way water valve (17), through the internal core of the six-way water valve (17) to the fifth port of the six-way water valve (17), from the fifth port of the six-way water valve (17) to the water tank (14) in sequence through the motor (11), the electric drive (12), and the electric control (13), from the water tank (14) to the first port of the five-way water valve (16), through the internal core of the five-way water valve (16) to the fourth port of the five-way water valve (16), and from the fourth port of the five-way water valve (16) back to the water-cooled condenser (2); The coolant flows from the battery cooler (4) to the fourth port of the five-way water valve (16), then flows through the internal core of the five-way water valve (16) to the third port of the five-way water valve (16), flows out from the third port of the five-way water valve (16) and flows into the water-cooled core (9) through the second three-way water valve (19), then flows out from the water-cooled core (9) to the first port of the six-way water valve (17), and finally flows through the internal core of the six-way water valve (17) to the six-way water valve (17). The water flows out from the second port of the six-way water valve (17) and into the heater core (8) through the first three-way water valve (18). It flows out from the heater core (8) and into the third port of the six-way water valve (17) through the third three-way water valve (20). It then flows through the internal core of the six-way water valve (17) to the sixth port of the six-way water valve (17). Finally, it flows out from the sixth port of the six-way water valve (17) and back into the battery cooler (4) through the first water pump (5).

7. The automotive air conditioning system with core series connection and integrated valve group according to claim 3, characterized in that, When running battery cooling mode: The refrigerant flows sequentially through the compressor (1), the water-cooled condenser (2), the electronic expansion valve (3), and the battery cooler (4), and then flows back to the compressor (1) from the battery cooler (4); Coolant flows from the water-cooled condenser (2) to the second water pump (6), from the second water pump (6) to the fourth port of the six-way water valve (17), through the internal core of the six-way water valve (17) to the fifth port of the six-way water valve (17), from the fifth port of the six-way water valve (17) to the motor (11), the electric drive (12), and the electric control (13) to the water tank (14), from the water tank (14) to the first port of the five-way water valve (16), through the internal core of the five-way water valve (16) to the fourth port of the five-way water valve (16), from the fourth port of the five-way water valve (16) back to the water-cooled condenser (2); The coolant flows from the battery cooler (4) to the fourth port of the five-way water valve (16), then flows through the internal core of the five-way water valve (16) to the third port of the five-way water valve (16), flows out from the third port of the five-way water valve (16) through the second three-way water valve (19) into the water-to-water heat exchanger (22), flows out from the water-to-water heat exchanger (22) through the third three-way water valve (20) into the third port of the six-way water valve (17), then flows through the internal core of the six-way water valve (17) to the sixth port of the six-way water valve (17), and flows out from the sixth port of the six-way water valve (17) back to the battery cooler (4) via the first water pump (5); The coolant in the battery (10) flows into the water-to-water heat exchanger (22), and flows out of the water-to-water heat exchanger (22) and returns to the battery (10) via the third water pump (7).

8. The automotive air conditioning system with a core series connection and integrated valve group according to claim 3, characterized in that, When the cabin heating mode is running: The refrigerant flows sequentially through the compressor (1), the water-cooled condenser (2), the electronic expansion valve (3), and the battery cooler (4), and then flows back to the compressor (1) from the battery cooler (4); Coolant flows from the water-cooled condenser (2) to the second water pump (6), then from the second water pump (6) to the fourth port of the six-way water valve (17), and through the internal core of the six-way water valve (17), it flows to the third port of the six-way water valve (17). From the third port of the six-way water valve (17), it flows through the third three-way water valve (20) into the heater core (8), and from the heater core (8), it flows through the first three-way water valve (18) into the second port of the six-way water valve (17). The water flows through the internal core of the six-way water valve (17) to the first port of the six-way water valve (17), flows out from the first port of the six-way water valve (17) into the water-cooled core (9), flows out from the water-cooled core (9) through the second three-way water valve (19) into the third port of the five-way water valve (16), flows through the internal core of the five-way water valve (16) to the second port of the five-way water valve (16), and flows out from the second port of the five-way water valve (16) back into the water-cooled condenser (2); The coolant flows from the battery cooler (4) to the fourth port of the five-way water valve (16), then flows through the internal core of the five-way water valve (16) to the first port of the five-way water valve (16), flows out from the first port of the five-way water valve (16), and flows sequentially through the water tank (14), the electronic control (13), the electric drive (12), and the motor (11) into the fifth port of the six-way water valve (17), then flows through the internal core of the six-way water valve (17) into the sixth port of the six-way water valve (17), and flows out from the sixth port of the six-way water valve (17) back into the battery cooler (4) via the first water pump (5).

9. The automotive air conditioning system with core series connection and integrated valve group according to claim 3, characterized in that, When running battery heating mode: The refrigerant flows sequentially through the compressor (1), the water-cooled condenser (2), the electronic expansion valve (3), and the battery cooler (4), and then flows back to the compressor (1) from the battery cooler (4); Coolant flows from the water-cooled condenser (2) to the second water pump (6), from the second water pump (6) to the fourth port of the six-way water valve (17), through the internal core of the six-way water valve (17) to the third port of the six-way water valve (17), from the third port of the six-way water valve (17) through the third three-way water valve (20) into the water-to-water heat exchanger (22), from the water-to-water heat exchanger (22) to the water heater (23), from the water heater (23) through the second three-way water valve (19) into the third port of the five-way water valve (16), through the internal core of the five-way water valve (16) to the second port of the five-way water valve (16), from the second port of the five-way water valve (16) back into the water-cooled condenser (2); The coolant in the battery (10) flows to the water-to-water heat exchanger (22) for heat exchange, and then flows out of the water-to-water heat exchanger (22) and back to the battery (10) via the third water pump (7).

10. The automotive air conditioning system with a core series connection and integrated valve group according to claim 4, characterized in that, When the cabin dehumidification mode is running: The refrigerant flows sequentially through the compressor (1), the water-cooled condenser (2), the electronic expansion valve (3), and the battery cooler (4), and then flows back to the compressor (1) from the battery cooler (4). Coolant flows from the water-cooled condenser (2) to the second water pump (6), from the second water pump (6) to the fourth port of the six-way water valve (17), through the internal core of the six-way water valve (17) to the third port of the six-way water valve (17), from the third port of the six-way water valve (17) to the third three-way water valve (20) to the heater core (8), from the heater core (8) to the first three-way water valve (18) to the fifth port of the five-way water valve (16), through the internal core of the five-way water valve (16) to the second port of the five-way water valve (16), from the second port of the five-way water valve (16) back to the water-cooled condenser (2); The coolant flows from the battery cooler (4) to the fourth port of the five-way water valve (16), then flows through the internal core of the five-way water valve (16) to the third port of the five-way water valve (16), flows out from the third port of the five-way water valve (16) and flows into the water-cooled core (9) through the second three-way water valve (19), flows out from the water-cooled core (9) and flows into the fifth port of the six-way water valve (17) through the second two-way water valve (24), then flows through the internal core of the six-way water valve (17) to the sixth port of the six-way water valve (17), and flows out from the sixth port of the six-way water valve (17) and flows back to the battery cooler (4) through the first water pump (5).

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