A vehicle thermal management system based on r290 refrigerant

Abstract

The application discloses a kind of based on R290 refrigerant's automobile thermal management system, including agent side integrated module and air conditioning host, the agent side integrated module includes water source condenser, electronic expansion valve, water source evaporator and compressor integrated together and form refrigerant circulation loop, the air conditioning host includes warm air core body and cold air core body;It further includes eight-way water valve, warm air three-way valve, cold air three-way valve, motor three-way valve, motor, radiator, battery, warm air water pump, cold air water pump, motor water pump and battery water pump, can realize the switching of nine kinds of working modes by eight-way water valve, warm air three-way valve, cold air three-way valve, motor three-way valve, system composition is simple, switching is flexible, can effectively utilize motor, battery waste heat.The application can solve the problems that too many parts of existing automobile thermal management system, when R290 refrigerant is applied, not enough safe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile thermal management systems, in particular to an automobile thermal management system based on R290 refrigerant. BACKGROUND

[0002] Current electric vehicle thermal management systems use R134 and R1234yf as refrigerants, and their heating performance and COP are greatly reduced when the low-temperature working condition, especially when the ambient temperature is below minus 15 degrees. New working medium refrigerants have begun to be considered, and R290, as a natural working medium, has become an ideal refrigerant medium for the next generation of thermal management systems due to its high-efficiency low-temperature performance and working pressure range. However, R290 is flammable and explosive, and the vehicle thermal management arrangement cannot be arranged in the passenger compartment, so the air conditioning main unit in the passenger compartment cannot use traditional evaporators and condensers for refrigeration and heating. Moreover, the current thermal management system has many parts, and the safety of R290 refrigerant collision and flammability must be considered, which brings great challenges to the efficiency and safety of the system, so a simple and compact automobile thermal management system that meets the safe use of R290 refrigerant is needed. SUMMARY

[0003] The present application provides an automobile thermal management system based on R290 refrigerant, which can solve the problem of too many parts in the existing automobile thermal management system and the lack of safety when using R290 refrigerant.

[0004] In order to achieve the above object, the present application provides the following technical scheme: a kind of automobile thermal management system based on R290 refrigerant, including agent side integrated module and air conditioning host, the agent side integrated module includes water source condenser, electronic expansion valve, water source evaporator and compressor integrated together and form refrigerant circulation loop, the air conditioning host includes warm air core body and cold air core body;It further includes eight-way water valve, warm air three-way valve, cold air three-way valve, motor three-way valve, motor, radiator, battery, warm air water pump, cold air water pump, motor water pump and battery water pump;The a port and b port of the warm air three-way valve are connected with the cooling liquid outlet of warm air core body and the B port of eight-way water valve respectively, and the c port of the warm air three-way valve is connected with the cooling liquid inlet of warm air core body and water source condenser simultaneously;The c port and b port of the cold air three-way valve are connected with the cooling liquid outlet of cold air core body and the G port of eight-way water valve respectively, and the a port of the cold air three-way valve is connected with the cooling liquid inlet of cold air core body and water source evaporator simultaneously;The water source condenser is connected with the A port of eight-way water valve by warm air water pump, and the water source evaporator is connected with the H port of eight-way water valve by cold air water pump;The a port and b port of the motor three-way valve are connected with the cooling liquid outlet of motor and the cooling liquid inlet of radiator respectively, and the c port of the motor three-way valve is connected with the cooling liquid outlet of radiator and the D port of eight-way water valve simultaneously, and the cooling liquid inlet of motor is connected with the C port of eight-way water valve by motor water pump;The cooling liquid outlet of battery is connected with the E port of eight-way water valve, and the cooling liquid inlet of battery is connected with the F port of eight-way water valve by battery water pump, by setting the switching work of eight-way water valve and three three-way valves, the switching of multiple modes can be realized, and the agent side integrated module is arranged at the core position of the whole thermal management system, compact structure, relatively short pipeline length, reduce the filling amount of R290 refrigerant, more safe.

[0005] As preferred, the agent side integrated module further includes intermediate heat exchanger arranged between water source condenser and water source evaporator, the refrigerant passing through water source condenser and the refrigerant flowing back from water source evaporator exchange heat in intermediate heat exchanger, the low-temperature refrigerant from intermediate heat exchanger and water source evaporator exchanges heat, so as to further cool and increase supercooling degree;At the same time, the low-temperature refrigerant from intermediate heat exchanger and water source evaporator exchanges heat with high-temperature and high-pressure liquid refrigerant from water source condenser, and the temperature of the refrigerant is further improved before entering compressor, so as to improve superheat degree, so that the intermediate heat exchanger greatly improves system efficiency.

[0006] As preferred, the water source condenser, the intermediate heat exchanger, the water source evaporator and the electronic expansion valve are integrated into an integrated structure in sequence, wherein the water source condenser, the intermediate heat exchanger and the water source evaporator are all composed of laminated plates and the adjacent plates form the first and second heat exchange flow channels alternately and independently, the refrigerant in the compressor flows through the first heat exchange flow channels of the water source condenser and the intermediate heat exchanger in sequence, enters the electronic expansion valve, and then flows back to the compressor through the second heat exchange flow channels of the water source evaporator and the intermediate heat exchanger in sequence, and the water source condenser, the intermediate heat exchanger, the water source evaporator and the electronic expansion valve are installed as a component into the thermal management system, can be directly connected with the compressor and the water side valve plate, and do not need to be additionally installed with pipe fittings, so that the volume of the whole refrigerant side integrated module is small and the volume of the thermal management integrated module can also be small.

[0007] As preferred, the second heat exchange flow channel in the water source condenser is connected with the low-temperature cooling water inlet channel and the high-temperature cooling water outlet channel, and the first heat exchange flow channel in the water source condenser is connected with the high-temperature refrigerant inlet channel and the high-temperature refrigerant outlet channel; the first heat exchange flow channel in the intermediate heat exchanger is connected with the first medium-temperature heat exchange channels on both sides of the intermediate heat exchanger, and the second heat exchange flow channel in the intermediate heat exchanger is connected with the second medium-temperature heat exchange channels on both sides of the intermediate heat exchanger; the first heat exchange flow channel in the water source evaporator is connected with the cooling water inlet channel and the cooling water outlet channel, the second heat exchange flow channel in the water source evaporator is connected with the first transition channel and the second transition channel, the first transition channel is connected with the outlet of the expansion valve assembly, the second transition channel is connected with one of the second medium-temperature heat exchange channels, and the other second medium-temperature heat exchange channel is connected with the low-temperature refrigerant outlet channel in the water source condenser; one of the first medium-temperature heat exchange channels is connected with the high-temperature refrigerant outlet channel, and the other first medium-temperature heat exchange channel is connected with the first straight-through channel in the water source evaporator, and the first straight-through channel is connected with the inlet of the electronic expansion valve, so that the heat exchange flow path of the refrigerant is formed among the water source condenser, the intermediate heat exchanger and the water source evaporator through the arrangement of the channels.

[0008] As preferred, the air conditioner main machine further comprises a warm air door corresponding to the warm air core and a cold air door corresponding to the cold air core, so as to facilitate the control of the air conditioner outlet air, and match the multiple working modes of the thermal management system.

[0009] As preferred, the automobile thermal management system has nine working modes, wherein the first working mode is passenger compartment, battery refrigeration, and motor cooling through the radiator; the second working mode is battery refrigeration, and motor cooling through the radiator; the third working mode is passenger compartment refrigeration, and motor cooling through the radiator; the fourth working mode is battery and motor cooling through the radiator; the fifth working mode is passenger compartment heating, and battery and motor provide passenger compartment heating waste heat; the sixth working mode is battery waste heat alone heating the passenger compartment, and motor cooling through the radiator; the seventh working mode is passenger compartment and battery heating, and motor provides waste heat to the passenger compartment for defrosting; the eighth working mode is motor waste heat alone heating the battery and the passenger compartment; and the ninth working mode is passenger compartment heating, and battery refrigeration.

[0010] Further, in the first and second working modes, the eight-way water valve has the B port communicated with the C port, the A port communicated with the D port, the E port communicated with the H port, and the F port communicated with the G port.

[0011] In the third working mode, the eight-way water valve has the B port communicated with the C port, the A port communicated with the D port, the E port communicated with the F port, and the H port communicated with the G port.

[0012] In the fourth and fifth working modes, the eight-way water valve has the B port communicated with the F port, the A port communicated with the D port, the E port communicated with the H port, and the C port communicated with the G port.

[0013] In the sixth and seventh working modes, the eight-way water valve has the B port communicated with the F port, the A port communicated with the E port, the D port communicated with the H port, and the C port communicated with the G port.

[0014] In the eighth working mode, the eight-way water valve has the B port communicated with the C port, the A port communicated with the E port, the D port communicated with the H port, and the F port communicated with the G port.

[0015] In the ninth working mode, the eight-way water valve has the B port communicated with the A port, the C port communicated with the E port, the D port communicated with the H port, and the F port communicated with the G port.

[0016] As preferred, the heating core is provided with a PTC heating element, so as to meet the requirement of rapid heating of the passenger compartment.

[0017] Compared with the prior art, the automobile thermal management system has the following advantages:

[0018] The whole heat management system has less parts, nine working modes can be freely switched by setting an eight-way water valve and three three-way valves, and in multiple working modes, the motor waste heat and battery waste heat can be effectively utilized to reduce the energy consumption of air conditioner heating, improve the utilization efficiency of the radiator, and the efficiency of the whole heat management system is greatly improved.

[0019] An integrated agent-side integrated module is adopted to reduce the filling flow of R290 refrigerant in the agent-side module, without external pipeline connection, and the production and manufacturing detection cost of parts is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a system schematic diagram of the present application;

[0021] Figure 2 It is an interface diagram of the eight-way water valve of the present application;

[0022] Figure 3 It is an interface diagram of the three-way valve of the present application;

[0023] Figure 4 It is a flow path principle diagram of the first working mode of the present application;

[0024] Figure 5 It is a flow path principle diagram of the second working mode of the present application;

[0025] Figure 6 It is a flow path principle diagram of the third working mode of the present application;

[0026] Figure 7 It is a flow path principle diagram of the fourth working mode of the present application;

[0027] Figure 8 It is a flow path principle diagram of the fifth working mode of the present application;

[0028] Figure 9 It is a flow path principle diagram of the sixth working mode of the present application;

[0029] Figure 10 It is a flow path principle diagram of the seventh working mode of the present application;

[0030] Figure 11 It is a flow path principle diagram of the eighth working mode of the present application;

[0031] Figure 12 It is a flow path principle diagram of the ninth working mode of the present application;

[0032] Figure 13 It is a three-dimensional view of the integrated structure of the water source condenser, the intermediate heat exchanger, the water source evaporator and the electronic expansion valve of the present application;

[0033] Figure 14 for Figure 13 A three-dimensional structural diagram of the integrated modular structure;

[0034] Figure 15 for Figure 13 Schematic diagram of the refrigerant flow circuit in the integrated structure;

[0035] Figure 16 for Figure 13 Schematic diagram of the cooling water flow loop in the integrated structure.

[0036] Figure label:

[0037] 1. Eight-way water valve; 2. Battery; 3. Battery-powered water pump; 4. Cold air water pump; 5. Cold air three-way valve; 6. Warm air three-way valve; 7. Warm air water pump; 8. Motor-driven water pump; 9. Motor; 10. Motor-driven three-way valve; 11. Radiator; 21. Warm air damper; 22. Warm air core; 23. Cold air damper; 24. Cold air core; 100. Agent-side integrated module; 101. Compressor; 102. Intermediate heat exchanger; 103. Water source condenser; 104. Electronic expansion valve; 105. Water source evaporator. 111. Fin; 112. High-temperature cooling water outlet channel; 113. High-temperature refrigerant outlet channel; 114. Low-temperature refrigerant outlet channel; 115. Low-temperature cooling water inlet channel; 116. High-temperature refrigerant inlet channel; 122. First medium-temperature heat exchange channel; 123. Second medium-temperature heat exchange channel; 131. Cooling water inlet channel; 132. Cooling water outlet channel; 133. First transition channel; 134. Second transition channel; 135. First through channel; 200. Air conditioning unit. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] Existing automotive thermal management systems typically include battery circuits, motor circuits, air conditioning circuits, and a refrigeration module, as well as a water pump that powers the piping. Therefore, the number of components is relatively large. To achieve multiple operating modes, modern automotive thermal management systems often use multiple multi-channel water valves to switch between them. This makes the system's piping more complex, which is also detrimental to the operation of R290 refrigerant in the refrigeration module, as the module cannot handle large quantities of R290 refrigerant.

[0040] In a refrigeration module, which generally includes a compressor, a water-cooled condenser, an intermediate heat exchanger, a Chiller, and through the mutual cooperation between refrigerant and cooling water, it realizes the temperature control of the relevant components of the automobile. Specifically, the compressor is one of the core components of the automobile thermal management system, and its main function is to compress the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas, thereby increasing the pressure and temperature of the refrigerant and providing power for the circulation of the refrigerant in the system. For example, when the air conditioning refrigeration of the automobile is started, the compressor starts to suck the low-temperature and low-pressure refrigerant vapor from the evaporator, and after compression, it becomes high-temperature and high-pressure refrigerant vapor, which is discharged to prepare for the subsequent heat exchange process.

[0041] The function of the water-cooled condenser is to cool and condense the high-temperature and high-pressure refrigerant gas into liquid refrigerant. In this process, the refrigerant transfers heat to the cooling water, achieving heat dissipation. The high-temperature and high-pressure refrigerant gas enters the water-cooled condenser and flows in the condenser pipe. The cooling water flows outside the condenser shell or pipe and exchanges heat with the refrigerant. Because the temperature of the cooling water is relatively low, the heat of the refrigerant gas is absorbed by the cooling water, and the temperature is reduced, thereby condensing into liquid refrigerant. For example, during the driving process of the automobile, the heat generated by the engine is taken away by the cooling water circulating in the cooling system, and the water-cooled condenser in the air conditioning system uses this part of the cooling water to cool the refrigerant, dissipating the heat in the air conditioning system to the outside environment.

[0042] The Chiller (water source evaporator) is mainly used to cool other liquids in the automobile, such as battery cooling liquid or engine cooling liquid, etc. It reduces the temperature of these liquids through heat exchange between the refrigerant and these liquids to ensure the normal working temperature of the related components. When the low-temperature and low-pressure refrigerant flows in the Chiller (water source evaporator), it absorbs the heat of the battery cooling liquid or other liquids flowing through the Chiller, reducing the temperature of these liquids. After absorbing heat, the temperature of the refrigerant rises, and its state may change from liquid to gas or gas-liquid mixed state, and then returns to the compressor for the next cycle. For example, in an electric vehicle, the Chiller can transfer the heat generated by the battery to the refrigerant, preventing the battery from overheating, thereby prolonging the service life of the battery and ensuring its stable performance.

[0043] The intermediate heat exchanger plays a role in heat exchange and energy regulation in the system. It can realize the heat transfer between refrigerants or other fluids in different circuits, optimizing the performance and efficiency of the system, for example, in some complex thermal management systems, it is used to transfer heat from the high-temperature circuit to the low-temperature circuit, realizing energy recovery and reuse.

[0044] In the prior art, the water-cooled condenser, the intermediate heat exchanger and the Chiller (water source evaporator) are all independent heat exchangers, and each of the three heat exchangers has its own shell, pipeline and other structures, which need to be arranged separately in the limited space of the automobile, occupying a large space position, which is not conducive to the effective use of the internal space of the automobile, especially for small cars or new energy cars, the space occupied by the battery and other components is large, and the difficulty of space layout is greater.

[0045] The independent structure means that each heat exchanger has its own support, fixing and other components, and the overall weight is relatively large. This will increase the curb weight of the automobile, and then affect the fuel economy of the automobile or the cruising range of the electric automobile. For modern automobiles that pursue lightweight to improve performance and efficiency, additional weight is a disadvantage. Independent production of three heat exchangers requires separate investment in production equipment, molds and other resources, and the production process is relatively complex, the number of parts is large, resulting in increased manufacturing costs, and in the automobile assembly process, the three heat exchangers need to be installed, connected with pipelines and lines, and other operations, the installation process is complicated, increasing the labor cost and installation time, and the complex installation process may increase the probability of failure.

[0046] Therefore, in order to solve the above technical problems, such as Figures 1-16As shown, the following technical scheme is provided: an automobile thermal management system based on R290 refrigerant, comprising a refrigerant side integrated module 100 and an air conditioner main machine 200, the refrigerant side integrated module 100 comprising a water source condenser 103, an electronic expansion valve 104, a water source evaporator 105 and a compressor 101 which are integrated together and form a refrigerant circulation loop, the air conditioner main machine 200 comprising a warm air core 22 and a cold air core 24; further comprising an eight-way water valve 1, a warm air three-way valve 6, a cold air three-way valve 5, a motor three-way valve 10, a motor 9, a radiator 11, a battery 2, a warm air water pump 7, a cold air water pump 4, a motor water pump 8 and a battery water pump 3; the a port and the b port of the warm air three-way valve 6 are respectively connected with a cooling liquid outlet of the warm air core 22 and a B port of the eight-way water valve 1, the c port of the warm air three-way valve 6 is connected with a cooling liquid inlet of the warm air core 22 and the water source condenser 103 at the same time; the c port and the b port of the cold air three-way valve 5 are respectively connected with a cooling liquid outlet of the cold air core 24 and a G port of the eight-way water valve 1, the a port of the cold air three-way valve 5 is connected with a cooling liquid inlet of the cold air core 24 and the water source evaporator 105 at the same time; the water source condenser 103 is connected with an A port of the eight-way water valve 1 through the warm air water pump 7, the water source evaporator 105 is connected with an H port of the eight-way water valve 1 through the cold air water pump 4; the a port and the b port of the motor three-way valve 10 are respectively connected with a cooling liquid outlet of the motor 9 and a cooling liquid inlet of the radiator 11, the c port of the motor three-way valve 10 is connected with a cooling liquid outlet of the radiator 11 and a D port of the eight-way water valve 1 at the same time, the cooling liquid inlet of the motor 9 is connected with a C port of the eight-way water valve 1 through the motor water pump 8; a cooling liquid outlet of the battery 2 is connected with an E port of the eight-way water valve 1, a cooling liquid inlet of the battery 2 is connected with an F port of the eight-way water valve 1 through the battery water pump 3, through the switching work of the eight-way water valve 1 and the three three-way valves, the switching of multiple modes can be realized, and the refrigerant side integrated module 100 is arranged at the core position of the whole thermal management system, the structure is compact, the pipeline length is relatively short, the filling amount of R290 refrigerant is reduced, and it is safer.

[0047] As an integrated setting, the refrigerant side integrated module 100 and the air conditioner main machine 200 can be installed as a single module, and the eight-way water valve 1, the warm air three-way valve 6, the cold air three-way valve 5, the motor three-way valve 10, the warm air water pump 7, the cold air water pump 4, the motor water pump 8 and the battery water pump 3 can be integrated on an integrated valve plate, the communication between these components is realized through the flow channels in the integrated valve plate, and the on-off and switching between the flow channels are realized through the eight-way water valve 1, the warm air three-way valve 6, the cold air three-way valve 5 and the motor three-way valve 10, which are all prior art.

[0048] In the embodiment, as shown in Figure 1As shown, the said refrigerant side integrated module 100 further comprises an intermediate heat exchanger 102 arranged between the water source condenser 103 and the water source evaporator 105, the refrigerant passing through the water source condenser 103 and the refrigerant flowing back from the water source evaporator 105 exchange heat in the intermediate heat exchanger 102, the low temperature refrigerant from the water source evaporator 105 exchanges heat with the high temperature and high pressure liquid refrigerant from the water source condenser 103 in the intermediate heat exchanger 102, so that the low temperature refrigerant is further cooled and the supercooling degree is increased; at the same time, the low temperature refrigerant from the water source evaporator 105 exchanges heat with the high temperature and high pressure liquid refrigerant from the water source condenser 103 in the intermediate heat exchanger 102, so that the temperature of the low temperature refrigerant is further increased before entering the compressor, and the superheating degree is increased, so that the intermediate heat exchanger 102 greatly improves the system efficiency.

[0049] In order to improve the integration, as shown in the figure, Figures 13-16 As shown, the said water source condenser 103, the intermediate heat exchanger 102, the water source evaporator 105 and the electronic expansion valve 104 are sequentially stacked and integrated into an integrated structure, wherein the water source condenser 103, the intermediate heat exchanger 102 and the water source evaporator 105 are all composed of stacked plates, and the adjacent plates form first heat exchange flow channels and second heat exchange flow channels which are alternately arranged and independent, the refrigerant in the compressor 101 flows from the first heat exchange flow channels of the water source condenser 103 and the intermediate heat exchanger 102 into the electronic expansion valve 104, and then flows back to the compressor 101 through the second heat exchange flow channels of the water source evaporator 105 and the intermediate heat exchanger 102, and when installed, the water source condenser 103, the intermediate heat exchanger 102, the water source evaporator 105 and the electronic expansion valve 104 are installed as a component in the thermal management system, and can be directly connected with the compressor 101 and the water valve plate, without the need for additional installation of pipe fittings, so that the volume of the whole refrigerant side integrated module 100 is very small, and the volume of the thermal management integrated module can also be very small.

[0050] Specifically, the plates on the water source condenser 103, the intermediate heat exchanger 102 and the water source evaporator 105 are arranged in pairs. In order to form the first heat exchange flow channel and the second heat exchange flow channel which are alternated and independent, and to realize the shuttling circuit of the refrigerant in the three heat exchangers, the fins 111 can be installed in the first heat exchange flow channel and the second heat exchange flow channel to improve the heat exchange efficiency. Specifically, the second heat exchange flow channel in the water source condenser 103 is connected with the low-temperature cooling water inlet channel 115 and the high-temperature cooling water outlet channel 112, and the first heat exchange flow channel in the water source condenser 103 is connected with the high-temperature refrigerant inlet channel 116 and the high-temperature refrigerant outlet channel 113. The first heat exchange flow channel in the intermediate heat exchanger 102 is connected with the first medium-temperature heat exchange channel 122 located on both sides of the intermediate heat exchanger 102, and the second heat exchange flow channel in the intermediate heat exchanger 102 is connected with the second medium-temperature heat exchange channel 123 located on both sides of the intermediate heat exchanger 102. The first heat exchange flow channel in the water source evaporator 105 is connected with the cooling water inlet channel 131 and the cooling water outlet channel 132, and the second heat exchange flow channel in the water source evaporator 105 is connected with the first transition channel 133 and the second transition channel 134. The first transition channel 133 is connected with the outlet of the expansion valve assembly, and the second transition channel 134 is connected with one of the second medium-temperature heat exchange channels 123. The other second medium-temperature heat exchange channel 123 is connected with the low-temperature refrigerant outlet channel 114 in the water source condenser 103, so that the temperature of the low-temperature refrigerant returned from the water source evaporator 105 can be increased while the temperature of the high-temperature refrigerant is further reduced. One of the first medium-temperature heat exchange channels 122 is connected with the high-temperature refrigerant outlet channel 113, and the other first medium-temperature heat exchange channel 122 is connected with the first straight-through channel 135 in the water source evaporator 105. The first straight-through channel 135 is connected with the inlet of the electronic expansion valve 104. Through the arrangement of the channels, the heat exchange flow path of the refrigerant is formed among the water source condenser 103, the intermediate heat exchanger 102 and the water source evaporator 105. The high-temperature refrigerant inlet channel 116 is used to connect the high-temperature refrigerant from the compressor. The low-temperature cooling water circulates in the first heat exchange flow channel and exchanges heat with the high-temperature refrigerant, so that the temperature of the high-temperature refrigerant can be reduced. The low-temperature and low-pressure refrigerant after pressure reduction by the electronic expansion valve 104 in the water source evaporator 105 exchanges heat with the cooling water entering from the cooling water inlet channel 131, absorbs the heat of the cooling water, and completely evaporates into low-temperature and low-pressure gaseous refrigerant.

[0051] As a specific working principle of the agent-side integrated module 100 in the embodiment:

[0052] High temperature refrigerant path (high pressure side) : refrigerant is discharged from compressor 101, in the form of high temperature and high pressure gas, into water source condenser 103, that is, into high temperature refrigerant inlet passage 116, and then flows along the first heat exchange flow channel into high temperature refrigerant outlet passage 113, while low temperature cooling liquid enters water source condenser 103 from low temperature cooling water inlet passage 115, and flows along the second heat exchange flow channel into high temperature cooling water outlet passage 112, in the process, the high temperature and high pressure gaseous refrigerant is gradually condensed into high temperature and high pressure liquid by heat dissipation (water cooling).

[0053] Medium temperature refrigerant path (high pressure side, before expansion valve throttling) : high temperature and high pressure liquid refrigerant from water source condenser 103 enters one of the first medium temperature heat exchange passages 122, and flows along the first heat exchange flow channel into the first medium temperature heat exchange passage 122, while low temperature refrigerant from water source evaporator 105 flows between the second heat exchange flow channels between the two second medium temperature heat exchange passages 123, so that the high temperature and high pressure liquid refrigerant is further cooled and the supercooling degree is increased by heat exchange with the low temperature refrigerant from water source evaporator 105 in intermediate heat exchanger 102 before reaching the expansion valve; at the same time, the low temperature refrigerant from water source evaporator 105 is further heated after heat exchange with the high temperature and high pressure liquid refrigerant from water source condenser 103 in intermediate heat exchanger 102, and the temperature is further increased before entering the compressor, which improves the superheating degree, and intermediate heat exchanger 102 greatly improves the system efficiency.

[0054] The medium temperature liquid refrigerant further cooled by intermediate heat exchanger 102 directly enters first straight-through passage 135, which is not connected to the first heat exchange flow channel and the second heat exchange flow channel of water source evaporator 105, and its function is the same as that of the flow-through hole, the medium temperature liquid refrigerant directly enters electronic expansion valve 104, the medium temperature liquid refrigerant is throttled by electronic expansion valve 104, the pressure drops suddenly, part of the liquid flashes into gas, forming a low temperature and low pressure two-phase mixed state, and then enters first transition passage 133 of water source evaporator 105 from the outlet of the expansion valve assembly.

[0055] Low-temperature refrigerant path (low-pressure side evaporation heat absorption): The refrigerant after throttling by the electronic expansion valve 104 enters the water source evaporator 105, flows from the first transition channel 133 to the second transition channel 134 along the second heat exchange flow channel, and at the same time, the external high-temperature cooling liquid enters the cooling water inlet channel 131, flows into the cooling water outlet channel 132 along the first heat exchange flow channel. In this process, the low-temperature and low-pressure refrigerant absorbs the heat of the external high-temperature battery cooling liquid or engine cooling liquid, and completely evaporates into low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows out from the second transition channel 134 into the intermediate heat exchanger 102, exchanges heat with the high-temperature refrigerant from the water source condenser 103, and continues to be superheated. The gaseous refrigerant flowing out from the intermediate heat exchanger 102 enters the low-temperature refrigerant outlet channel 114, directly passes through the water source condenser 103 (without heat exchange) and returns to the compressor 101, completing the cycle.

[0056] In the embodiment, the air conditioner main unit 200 further comprises a warm air door 21 corresponding to the warm air core 22 and a cold air door 23 corresponding to the cold air core 24, facilitating control of air outlet of the air conditioner, matching various working modes of the thermal management system.

[0057] In the embodiment, as shown in Figures 4-12 , the automobile thermal management system has nine working modes, specifically:

[0058] As shown in Figure 4 , the first working mode is passenger compartment and battery refrigeration, the motor is cooled by the radiator, and the compressor 101 works. At this time, the B port of the eight-way water valve 1 is in communication with the C port, the A port is in communication with the D port, the E port is in communication with the H port, the F port is in communication with the G port, the warm air three-way valve 6 is switched to the c port in communication with the b port, the a port, the b port and the c port of the cold air three-way valve 5 are all in communication, the flow between the three ports is proportionally adjusted, the a port of the motor three-way valve 10 is in communication with the b port, the cooling water flowing through the water source condenser 103 does not enter the warm air core 22, forms a circulation through the eight-way water valve 1, the motor 9 and the radiator 11, and the cooling water flowing through the water source evaporator 105 also flows through the battery 2 through the eight-way water valve 1 while flowing through the cold air core 24, forming a circulation. In this way, the cold air door 23 of the cold air core 24 is opened to blow cold air into the passenger compartment, the battery is refrigerated by the agent side integrated module 100, and the motor is cooled by the radiator 11.

[0059] As shown in Figure 5As shown, the second working mode is battery cooling. The motor dissipates heat through the radiator, and the compressor 101 works. The states of the eight-way water valve 1, the heating three-way valve 6, and the motor three-way valve 10 are the same as in the first working mode. The difference is that only port a and port b are connected on the cold air three-way valve 5. In this way, the cooling water flowing through the water source evaporator 105 cannot enter the cold air core 24 and can only be used for battery cooling. The air conditioner cannot cool the passenger compartment.

[0060] like Figure 6 As shown, the third working mode is for occupant cabin cooling. The motor dissipates heat through the radiator, and the compressor 101 is working. The B port of the eight-way water valve 1 is connected to the C port, the A port is connected to the D port, the E port is connected to the F port, and the H port is connected to the G port. The C port of the heater three-way valve 6 is connected to the B port. The A port of the motor three-way valve 10 is connected to the B port. The C port of the cold air three-way valve 5 is connected to the B port. The cooling water flowing through the water source condenser 103 does not enter the heater core 22. It flows through the eight-way water valve 1, the motor 9, and the radiator 11 to form a circulation. The cooling water flowing through the water source evaporator 105 can only flow through the cold air core 24 and cannot flow through the battery 2 to cool the battery.

[0061] like Figure 7 As shown, in the fourth working mode, the battery and motor dissipate heat through the radiator, the compressor 101 does not work, the B port of the eight-way water valve 1 is connected to the F port, the A port is connected to the D port, the E port is connected to the H port, the C port is connected to the G port, the C port of the heating air three-way valve 6 is connected to the B port, the A port of the motor three-way valve 10 is connected to the B port, the A port of the cold air three-way valve 5 is connected to the B port, the cold air damper 23 and the heating air damper 21 are both closed, the cooling water flowing through the water source condenser 103 does not enter the heating air core 22, after passing through the eight-way water valve 1, it flows through the battery 2, then flows through the water source evaporator 105 and then flows back through the eight-way water valve 1 to enter the motor 9, and then flows through the radiator 11 for heat dissipation. In this way, the heat dissipation of the motor 9 and the battery 2 can be achieved through the radiator 11 without the need to use the compressor 101;

[0062] like Figure 8 As shown, the fifth working mode is for heating the passenger compartment. The battery and motor provide residual heat for heating the passenger compartment. The compressor 101 is not working, the heater damper 21 is open, and the working state of the eight-way water valve 1 and the cold air three-way valve 5 is the same as in the fifth working mode. The difference is that the a port of the heater three-way valve 6 is connected to the b port, and the a port of the motor three-way valve 10 is connected to the c port. The cooling water flowing through the water source condenser 103 flows through the heater core 22, passes through the eight-way water valve 1, flows through the battery 2, then flows through the water source evaporator 105, and then flows back through the eight-way water valve 1 to enter the motor 9. Then the cooling water does not flow through the radiator 11, but flows directly back to the water source condenser 103. In this way, the heat generated by the battery and motor can be used to heat the cooling water flowing through the heater core 22, and the air conditioner blows warm air into the passenger compartment.

[0063] As Figure 9 shown, the sixth working mode is that the battery waste heat is used to heat the passenger cabin alone, and the motor is cooled through the radiator, wherein the compressor 101 is not working, the air heater door 21 is opened, the B port and the F port of the eight-way water valve 1 are communicated, the A port and the E port are communicated, the D port and the H port are communicated, the C port and the G port are communicated, the a port and the b port of the air heater three-way valve 6 are communicated, the a port and the b port of the motor three-way valve 10 are communicated, the a port and the b port of the cold air three-way valve 5 are communicated, the cooling water flowing through the water source condenser 103 flows through the air heater core 22, and then flows to the eight-way water valve 1, and then flows through the battery 2, and then flows back to the eight-way water valve 1, and then flows back to the water source condenser 103 to realize a separate circulation, the cooling water flowing through the water source evaporator 105 does not flow through the cold air core 24, and directly flows back to the eight-way water valve 1, and then flows through the motor 9 and the radiator 11 to form a separate circulation loop, so that the air heater core 22 can be heated alone by using the heat of the battery 2 to blow hot air to the passenger cabin.

[0064] As Figure 10 shown, the seventh working mode is that the passenger cabin and the battery are heated, and the motor is used to provide waste heat to the passenger cabin for defrosting, wherein the compressor 101 is working, the air heater door 21 and the cold air door 23 are opened, the air conditioner is opened in the defrosting mode, the working states of the eight-way water valve 1 and the air heater three-way valve 6 are the same as those in the sixth working mode, except that the a port and the c port of the motor three-way valve 10 are communicated, and the b port and the c port of the cold air three-way valve 5 are communicated, the cooling water flowing through the water source condenser 103 flows through the air heater core 22, and then flows to the eight-way water valve 1, and then flows through the battery 2, and then flows back to the eight-way water valve 1, and then flows back to the water source condenser 103 to realize a separate circulation, the cooling water flowing through the water source evaporator 105 flows through the cold air core 24, and then flows back to the eight-way water valve 1, and then flows through the motor 9, and does not flow through the radiator 11, and then flows back to the water source evaporator 105 through the eight-way water valve 1 to form a separate circulation loop, so that the air heater core 22 can be heated alone by using the heat of the battery 2 to blow hot air to the passenger cabin, and the cold air core 24 can blow a medium-temperature airflow for defrosting;

[0065] As Figure 11As shown, in the eighth operating mode, the waste heat from the motor separately heats the battery and the passenger compartment. The compressor 101 is not operating, the heater damper 21 is open, and the eight-way water valve 1 connects ports B and C, A and E, D and H, and F and G. The heater three-way valve 6 connects ports a and b, the motor three-way valve 10 connects ports a and c, and the cold air three-way valve 5 connects ports a and b. Cooling air flows through the water source condenser 103. After the water flows through the heater core 22, it enters the motor 9 through the eight-way water valve 1. Then, instead of flowing through the radiator 11, it flows directly back to the eight-way water valve 1 and then through the water source evaporator 105. The cooling water flowing through the water source evaporator 105 does not flow through the cold air core 24, but flows directly through the battery 2, and then flows back to the water source condenser 103 through the eight-way water valve 1. In this way, the waste heat of the motor can heat the battery and the passenger compartment at the same time, saving the heat of the battery waste heat and the heating heat of the passenger compartment.

[0066] like Figure 12 As shown, the ninth operating mode is crew cabin heating and battery cooling. Compressor 101 starts working, the heater damper 21 opens, and the eight-way water valve 1 connects ports B and A, C and E, D and H, and F and G. The heater three-way valve 6 connects ports a and b, the motor three-way valve 10 connects ports a and c, and the cold air three-way valve 5 connects ports a and b. Cooling water flowing through the water source condenser 103 flows through the heater core 22 and then... After passing through the eight-way water valve 1, the water flows back to the water source condenser 103 to form a separate circulation path. The cooling water flowing through the water source evaporator 105 does not flow through the cold air core 24, but flows directly through the battery 2, and then enters the motor 9 through the eight-way water valve 1. After flowing through the motor 9, it does not flow through the radiator 11, but flows directly through the eight-way water valve 1 and then flows back to the water source evaporator 105. The crew cabin heating, battery cooling and motor cooling are achieved by the compressor 101, which can realize the rapid heating of the crew cabin.

[0067] The above nine modes can meet various thermal management conditions during vehicle use, and can also effectively utilize the waste heat of the motor and battery to reduce the energy consumption of air conditioning heating and improve the utilization efficiency of the radiator.

[0068] Meanwhile, a PTC heating element can also be installed in the warm air core 22 to meet the need for rapid heating of the occupant cabin.

[0069] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0070] In addition, the descriptions in the present application such as "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically defined.

[0071] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A R290 refrigerant based automotive thermal management system comprising of a refrigerant side integrated module (100) and an air conditioning host (200) characterized by, The agent side integrated module (100) includes a water source condenser (103), an electronic expansion valve (104), a water source evaporator (105) and a compressor (101) integrated together and forming a refrigerant circulation loop, the air conditioner main machine (200) includes a warm air core (22) and a cold air core (24); further comprising an eight-way water valve (1), a warm air three-way valve (6), a cold air three-way valve (5), a motor three-way valve (10), a motor (9), a radiator (11), a battery (2), a warm air water pump (7), a cold air water pump (4), a motor water pump (8) and a battery water pump (3); The a port and the b port of the warm air three-way valve (6) are communicated with the cooling liquid outlet of the warm air core (22) and the B port of the eight-way water valve (1) respectively, and the c port of the warm air three-way valve (6) is communicated with the cooling liquid inlet of the warm air core (22) and the water source condenser (103) simultaneously; The c port and the b port of the cold air three-way valve (5) are communicated with the cooling liquid outlet of the cold air core (24) and the G port of the eight-way water valve (1) respectively, and the a port of the cold air three-way valve (5) is communicated with the cooling liquid inlet of the cold air core (24) and the water source evaporator (105) simultaneously; The water source condenser (103) is communicated with the A port of the eight-way water valve (1) through the warm air water pump (7), and the water source evaporator (105) is communicated with the H port of the eight-way water valve (1) through the cold air water pump (4); The a port and the b port of the motor three-way valve (10) are connected with the cooling liquid outlet of the motor (9) and the cooling liquid inlet of the radiator (11) respectively, the c port of the motor three-way valve (10) is connected with the cooling liquid outlet of the radiator (11) and the D port of the eight-way water valve (1) simultaneously, and the cooling liquid inlet of the motor (9) is communicated with the C port of the eight-way water valve (1) through the motor water pump (8); The cooling liquid outlet of the battery (2) is communicated with the E port of the eight-way water valve (1), and the cooling liquid inlet of the battery (2) is communicated with the F port of the eight-way water valve (1) through the battery water pump (3).

2. The R290 refrigerant-based automotive thermal management system of claim 1, wherein: The agent side integrated module (100) further comprises an intermediate heat exchanger (102) arranged between the water source condenser (103) and the water source evaporator (105), and the refrigerant passing through the water source condenser (103) and the refrigerant flowing back from the water source evaporator (105) exchange heat in the intermediate heat exchanger (102).

3. The R290 refrigerant-based automotive thermal management system of claim 2, wherein: The water source condenser (103), the intermediate heat exchanger (102), the water source evaporator (105) and the electronic expansion valve (104) are sequentially stacked and integrated into an integrated structure, wherein the water source condenser (103), the intermediate heat exchanger (102) and the water source evaporator (105) are all composed of laminated plates and form first and second heat exchange flow channels which are alternated and independent between adjacent plates, and the refrigerant in the compressor (101) sequentially flows from the first heat exchange flow channels of the water source condenser (103) and the intermediate heat exchanger (102), enters the electronic expansion valve (104), and then sequentially flows through the second heat exchange flow channels of the water source evaporator (105) and the intermediate heat exchanger (102) and returns to the compressor (101).

4. The R290 refrigerant-based automotive thermal management system of claim 3, wherein: The second heat exchange flow channel in the water source condenser (103) is connected with the low-temperature cooling water inlet channel (115) and the high-temperature cooling water outlet channel (112), and the first heat exchange flow channel in the water source condenser (103) is connected with the high-temperature refrigerant inlet channel (116) and the high-temperature refrigerant outlet channel (113); the first heat exchange flow channel in the intermediate heat exchanger (102) is connected with the first medium-temperature heat exchange channels (122) located on both sides of the intermediate heat exchanger (102), and the second heat exchange flow channel in the intermediate heat exchanger (102) is connected with the second medium-temperature heat exchange channels (123) located on both sides of the intermediate heat exchanger (102); the first heat exchange flow channel in the water source evaporator (105) is connected with the cooling water inlet channel (131) and the cooling water outlet channel (132), the second heat exchange flow channel in the water source evaporator (105) is connected with the first transition channel (133) and the second transition channel (134), the first transition channel (133) is connected with the outlet of the expansion valve assembly, the second transition channel (134) is connected with one of the second medium-temperature heat exchange channels (123), and the other second medium-temperature heat exchange channel (123) is connected with the low-temperature refrigerant outlet channel (114) in the water source condenser (103); one of the first medium-temperature heat exchange channels (122) is connected with the high-temperature refrigerant outlet channel (113), and the other first medium-temperature heat exchange channel (122) is connected with the first straight-through channel (135) in the water source evaporator (105), and the first straight-through channel (135) is connected with the inlet of the electronic expansion valve (104).

5. The R290 refrigerant-based automotive thermal management system of claim 1, wherein: The air conditioner main machine (200) further comprises a warm air door (21) corresponding to the warm air core (22) and a cold air door (23) corresponding to the cold air core (24).

6. The R290 refrigerant-based automotive thermal management system of claim 1, wherein: The automobile thermal management system has nine working modes, wherein the first working mode is passenger cabin and battery refrigeration, and the motor is cooled through the radiator; the second working mode is battery refrigeration, and the motor is cooled through the radiator; the third working mode is passenger cabin refrigeration, and the motor is cooled through the radiator; the fourth working mode is battery and motor cooling through the radiator; the fifth working mode is passenger cabin heating, and the battery and the motor provide the passenger cabin heating waste heat; the sixth working mode is battery waste heat alone heating the passenger cabin, and the motor is cooled through the radiator; the seventh working mode is passenger cabin and battery heating, and the motor provides waste heat to the passenger cabin for defrosting; the eighth working mode is motor waste heat alone heating the battery and the passenger cabin; and the ninth working mode is passenger cabin heating and battery refrigeration. In the first and second working modes, the B port and the C port of the eight-way water valve (1) are connected in communication, the A port and the D port are connected in communication, the E port and the H port are connected in communication, and the F port and the G port are connected in communication.

7. The R290 refrigerant-based automotive thermal management system of claim 6, wherein: In the third working mode, the B port and the C port of the eight-way water valve (1) are connected in communication, the A port and the D port are connected in communication, the E port and the F port are connected in communication, and the H port and the G port are connected in communication. In the fourth and fifth working modes, the B port and the F port of the eight-way water valve (1) are connected in communication, the A port and the D port are connected in communication, the E port and the H port are connected in communication, and the C port and the G port are connected in communication. In the sixth and seventh working modes, the B port and the F port of the eight-way water valve (1) are connected in communication, the A port and the E port are connected in communication, the D port and the H port are connected in communication, and the C port and the G port are connected in communication. In the eighth working mode, the B port and the C port of the eight-way water valve (1) are connected in communication, the A port and the E port are connected in communication, the D port and the H port are connected in communication, and the F port and the G port are connected in communication. In the ninth working mode, the B port and the A port of the eight-way water valve (1) are connected in communication, the C port and the E port are connected in communication, the D port and the H port are connected in communication, and the F port and the G port are connected in communication. The PTC heating element is installed in the heater core (22).

8. The R290 refrigerant-based automotive thermal management system of claim 1, wherein: ​

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