A low cost thermal management system

Abstract

The utility model relates to a low -cost heat management system, wherein low -cost heat management system includes waterside valve island, agent side integrated mechanism, agent side integrated mechanism includes the compressor, water cooler, liquid storage tank, flash tank expansion valve, flash tank, refrigerator expansion valve, refrigerator that set up in series, flash tank has first output and second output, the input and first output of compressor, water cooler, liquid storage tank, flash tank expansion valve, flash tank, refrigerator expansion valve, refrigerator are in proper order series, second output communicates with compressor through flash tank branch, second output is higher than first output, the downstream of refrigerator includes cold water tee bend valve, makes the refrigerator directly with waterside valve island be in series connection, or be connected with waterside valve island after cooling device, fan heat exchange mechanism, fan heat exchange mechanism includes fan heat exchange unit, fan heat exchange unit and waterside valve island are in series connection, the utility model can be through the low -cost reformation of flash tank intervention agent side integrated mechanism in, realizes the air supplement and increases the enthalpy, is applicable to the extreme vehicle environment.

Description

Technical Field

[0001] This utility model relates to a thermal management system, and more particularly to a low-cost thermal management system. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] In vehicle-mounted thermal management systems, the main functions generally consist of refrigerant compression, cooling / cooling, and heating / cooling. In some scenarios, a water-cooled LCC (liquid cooler) acts as the condenser, and a water-cooled chiller acts as the evaporator. By intelligently controlling the circulation paths of the refrigerant and coolant, efficient cooling, heating, and energy recovery are achieved, making it particularly suitable for electric and hybrid vehicles. However, because the water cooler and chiller require simultaneous connection to both refrigerant and water lines, the intersection of these two different lines leads to a complex system organization, making low-cost and rapid installation difficult. Furthermore, some existing designs introduce refrigerant into the passenger compartment, which also lowers safety standards.

[0004] In existing systems, insufficient temperature regulation may occur under extreme high and low temperature operating conditions. Therefore, addressing this issue from the perspective of enthalpy compensation could be considered, but the challenge lies in the high cost of implementing existing thermal management systems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a low-cost thermal management system that can achieve gas replenishment and enthalpy increase by integrating the flash tank into the agent side of the mechanism with low modification cost, making it suitable for extreme vehicle operating environments.

[0007] To achieve the above objectives, this utility model discloses a low-cost thermal management system, which includes:

[0008] Water-side valve island;

[0009] A water cooler having a first condensate path and a first water cooling path;

[0010] The refrigerator has a second condensate passage and a second water cooling passage;

[0011] The agent-side integrated mechanism includes a compressor, a liquid receiver, a flash tank expansion valve, a flash tank, and a refrigerator expansion valve arranged in series. The flash tank has a first output end and a second output end. The compressor, a first condensate circuit, a liquid receiver, a flash tank expansion valve, an input end and a first output end of the flash tank, a refrigerator expansion valve, and a second condensate circuit are connected in series. The second output end of the flash tank is connected to the compressor through a flash tank branch. The second output end of the flash tank is higher than the first output end of the flash tank.

[0012] A passenger cabin mechanism, the passenger cabin mechanism including a cooler, a heater, and a blower disposed on one side of the cooler and the heater;

[0013] The downstream of the water cooler includes a hot water three-way valve, which allows the water cooler to be connected in series with the water-side valve island through a first water-cooling passage, or to be connected in series with the water-side valve island after passing through the heater; the downstream of the chiller includes a cold water three-way valve, which allows the chiller to be connected in series with the water-side valve island through a second water-cooling passage, or to be connected in series with the water-side valve island after passing through the cooler.

[0014] A fan heat exchange mechanism, comprising a fan heat exchange unit and a heat exchange fan disposed on one side of the fan heat exchange unit; the fan heat exchange unit is connected in series with the water-side valve island.

[0015] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the fan heat exchange unit, the drive motor heat exchange unit, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the fan heat exchange unit, and the drive motor heat exchange unit in sequence and then returns to the inlet of the water cooler.

[0016] The second water-cooling passage is connected in series with the refrigerator outlet, the cooler, the four-way valve, and the refrigerator inlet. The coolant flows through the refrigerator outlet, the four-way valve, and the cooler in sequence before returning to the refrigerator inlet. The battery heat exchange unit is thermally coupled to the four-way valve.

[0017] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, and the four-way valve in sequence and then returns to the inlet of the water cooler. The battery heat exchange unit is thermally coupled to the four-way valve.

[0018] The second water-cooling passage is connected in series with the refrigerator outlet, the cooler, the fan heat exchange unit, the drive motor heat exchange unit, and the refrigerator inlet. The coolant flows through the refrigerator outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler in sequence before returning to the refrigerator inlet.

[0019] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, and the four-way valve in sequence and then returns to the inlet of the water cooler. The coolant also passes through a separate water path through the four-way valve and then returns directly to the inlet of the water cooler without passing through the battery heat exchange unit.

[0020] The second water-cooling passage is connected in series with the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler inlet. The coolant flows sequentially through the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler before returning to the cooler inlet.

[0021] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, the battery heat exchange unit, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, the four-way valve, and the battery heat exchange unit in sequence before returning to the inlet of the water cooler. The battery heat exchange unit is thermally coupled to the four-way valve.

[0022] The second water-cooling passage is connected in series with the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler inlet. The coolant flows sequentially through the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler before returning to the cooler inlet.

[0023] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, the battery heat exchange unit, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, the four-way valve, and the battery heat exchange unit in sequence before returning to the inlet of the water cooler. The battery heat exchange unit is thermally coupled to the four-way valve.

[0024] The second water-cooling passage is connected in series with the cooler outlet, the drive motor heat exchange unit, and the cooler inlet. The coolant flows through the cooler outlet, the drive motor heat exchange unit, and the cooler in sequence before returning to the cooler inlet.

[0025] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler and the four-way valve in sequence and then returns to the inlet of the water cooler. The coolant also passes through a separate water path and the four-way valve and then returns directly to the inlet of the water cooler without passing through the battery heat exchange unit.

[0026] The second water-cooling passage is connected in series with the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler inlet. The coolant flows sequentially through the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler before returning to the cooler inlet.

[0027] As a further description of the above technical solution, the first water-cooling passage is connected in series with the outlet of the water cooler, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler and the four-way valve in sequence and then returns to the inlet of the water cooler. The coolant also passes through a separate water path and the four-way valve and then returns directly to the inlet of the water cooler without passing through the battery heat exchange unit.

[0028] The second water-cooling path does not participate in the circulation.

[0029] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0030] This utility model discloses a low-cost thermal management system that integrates the flash tank into the refrigerant side of the mechanism with minimal modification costs, achieving gas replenishment and enthalpy enhancement, making it suitable for extreme driving environments. Specifically, in this utility model, a flash tank for separating the refrigerant and an expansion valve for auxiliary throttling are connected in series downstream of the liquid receiver and upstream of the refrigerant, enabling the flash tank to replenish gas to the compressor. Therefore, stable compressor suction can be ensured even under extreme driving environments.

[0031] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a schematic diagram of a low-cost thermal management system for passenger compartment cooling provided in the embodiments of this specification;

[0034] Figure 2 This is a schematic diagram of a low-cost thermal management system for dehumidifying the passenger compartment, as provided in the embodiments of this specification.

[0035] Figure 3 This is a schematic diagram of a low-cost thermal management system for passenger compartment heating provided in the embodiments of this specification;

[0036] Figure 4 This is a schematic diagram of the residual temperature of the battery heat exchange unit in a low-cost thermal management system provided in the embodiments of this specification;

[0037] Figure 5 This is a schematic diagram of the residual heat recovery drive motor heat exchange unit of a low-cost thermal management system provided in the embodiments of this specification;

[0038] Figure 6 This is a schematic diagram of the battery heat exchange unit heating of a low-cost thermal management system provided in the embodiments of this specification;

[0039] Figure 7 This is a schematic diagram of the de-icing of a fan heat exchange unit in a low-cost thermal management system provided in the embodiments of this specification;

[0040] Figure 8 This is a schematic diagram of valve port markings for a low-cost thermal management system provided in the embodiments of this specification;

[0041] In the picture:

[0042] 1. Water-side valve island; 11. First valve port; 12. Second valve port; 13. Third valve port; 14. Fourth valve port; 15. Fifth valve port; 16. Sixth valve port; 17. Seventh valve port; 18. Eighth valve port; 19. Ninth valve port;

[0043] 2. Agent-side integrated mechanism; 21. Compressor; 211. First sensor; 212. Second sensor; 22. Water cooler; 23. Refrigerator expansion valve; 24. Refrigerator; 25. Liquid receiver; 26. Flash tank; 2601. Flash tank expansion valve; 2602. Temperature sensor;

[0044] 3. Passenger cabin mechanism; 31. Cooler; 32. Heater; 33. Blower;

[0045] 4. Fan heat exchange mechanism; 41. Fan heat exchange unit; 42. Heat exchange fan;

[0046] 5. Battery heat exchange unit; 51. Water bottle;

[0047] 6. Drive motor heat exchange unit;

[0048] 7. Hot water three-way valve; 71. Hot water first valve port; 72. Hot water second valve port; 73. Hot water third valve port;

[0049] 8. Cold water three-way valve; 81. Cold water first valve port; 82. Cold water second valve port; 83. Cold water third valve port;

[0050] 9. Four-way valve; 91. Four-way first valve port; 92. Four-way second valve port; 93. Four-way third valve port; 94. Four-way fourth valve port;

[0051] In the diagram, the thick black line represents low-temperature, low-pressure refrigerant, the thick orange line represents high-temperature, high-pressure refrigerant, the thin green line represents room-temperature water, the thin orange line represents high-temperature water, the thin blue line represents low-temperature water, and the thin yellow line represents warm water between low and high temperatures. Detailed Implementation

[0052] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0053] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0054] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0055] Please see Figure 1 This embodiment provides a low-cost thermal management system, which includes:

[0056] Water-side valve island 1;

[0057] The agent-side integrated mechanism 2 includes a compressor 21, a water cooler 22, a liquid storage tank 25, a refrigerator expansion valve 23, and a refrigerator 24. The agent-side integrated mechanism 2 also includes a gas replenishment and enthalpy enhancement mechanism, which is located between the liquid storage tank 25 and the refrigerator expansion valve 23 and is connected to the input end of the compressor 21. The gas replenishment and enthalpy enhancement mechanism is used to replenish gas to the compressor 21.

[0058] The passenger cabin mechanism 3 includes a cooler 31, a heater 32, and a blower 33 disposed on one side of the cooler 31 and the heater 32.

[0059] Downstream of the water cooler 22 is a hot water three-way valve 7, which allows the water cooler 22 to be connected in series with the water-side valve island 1 of the first water cooling passage, or connected in series with the water-side valve island 1 after passing through the heater 32; Downstream of the chiller 22 is a cold water three-way valve 8, which allows the chiller 24 to be connected in series with the water-side valve island 1 of the second water cooling passage, or connected in series with the water-side valve island 1 after passing through the cooler 31.

[0060] The fan heat exchange mechanism 4 includes a fan heat exchange unit 41 and a heat exchange fan 42 disposed on one side of the fan heat exchange unit 41; the fan heat exchange unit 41 is connected in series with the water-side valve island 1.

[0061] Based on the above structure, the water-side valve island 1 is mainly used to collect and exchange heat from water flows of different temperatures introduced from the agent-side integrated mechanism 2, passenger cabin mechanism 3, and fan heat exchange mechanism 4. It can mix cold and hot water according to actual needs to achieve temperature control. The water-side valve island 1 can be implemented electronically. In this embodiment, the water-side valve island 1 is a conventional multi-way valve body, such as a disc valve.

[0062] In actual operation, compressor 21 compresses the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant, which then enters the downstream water cooler 22. The high-temperature, high-pressure refrigerant heats the water flow in water cooler 22, then flows to the liquid storage tank 25 to store excess liquid refrigerant. A portion of the refrigerant flows to the gas injection and enthalpy-increasing mechanism, and then to the refrigerator expansion valve 23 for throttling. After expansion and pressure reduction, it becomes a low-temperature, low-pressure refrigerant and enters the downstream refrigerator 24. The low-temperature, low-pressure refrigerant cools the water flow in refrigerator 24 and then returns to compressor 21 through the suction port for the next cycle. Simultaneously, the heated water flow in water cooler 22 provides hot water to water-side valve island 1, and the cooled water flow in refrigerator 24 provides cold water to water-side valve island 1.

[0063] The cooler 22 in the agent-side integrated mechanism 2 is mainly used to directly supply high-temperature water to the water-side valve island 1, and the cooler 24 is mainly used to supply low-temperature water to the water-side valve island 1. By mixing and connecting the two types of high-temperature water and low-temperature water in series, under certain conditions, it is connected in series with the preset mechanism water circuit in the passenger cabin mechanism 3 and the fan heat exchange mechanism 4 to achieve the final thermal management function.

[0064] Meanwhile, in this utility model, during the operation of the above-mentioned agent-side integrated mechanism 2, a portion of the refrigerant in the gas replenishment and enthalpy enhancement mechanism enters the refrigeration expansion valve 23 for throttling, while another portion of the refrigerant passes through the gas replenishment and enthalpy enhancement mechanism and is input into the compressor 21. Therefore, gas replenishment to the compressor is achieved, and continuous gas replenishment and enthalpy enhancement to the compressor are realized. Specifically, this application provides the following two gas replenishment and enthalpy enhancement structures.

[0065] During the operation of the aforementioned agent-side integrated mechanism 2, after initial expansion and pressure reduction via the flash tank expansion valve 2601, the liquid refrigerant in the flash tank 26 enters the refrigerator expansion valve 23 for secondary throttling and refrigeration. The remaining gaseous refrigerant is directly re-injected into the compressor 21 to replenish enthalpy, allowing refrigerant to be added to the compressor 21 intermediately, rather than entirely from the refrigerator 24 side. This prevents the pressure of the refrigerant injected from the refrigerator 24 side after heat exchange from being too low under extreme weather conditions, which could affect the normal operation of the compressor 21. Therefore, in this embodiment, the flash tank 26 connected in parallel within the agent-side integrated mechanism can achieve gas replenishment and enthalpy enhancement, improving the system's temperature regulation capability. In this invention, the integrated agent-side mechanism 2 is used solely for refrigerant flow, offering high safety. Simultaneously, integrating the flash tank 26 into the agent-side integrated mechanism 2 enables continuous enthalpy replenishment through intermediate injection into the compressor 21, resulting in greater energy efficiency and suitability for extreme environments.

[0066] In the gas replenishment and enthalpy enhancement mechanism based on flash tank 26, a temperature sensor 2602 can be connected in series between the flash tank 26 and the refrigerator expansion valve 23. Therefore, the temperature of the liquid refrigerant discharged in the flash tank 26 can be detected to coordinate the flow control between the refrigerator expansion valve 23 and the flash tank expansion valve 2601.

[0067] In this embodiment, a four-way valve 9 is also introduced, connecting the water-side valve island 1 to the battery heat exchange unit 5 via the four-way valve 9. Water at the corresponding temperature is input to the battery heat exchange unit 5 through the water-side valve island 1 for temperature control. Simultaneously, in this embodiment, the four-way valve 9 is also connected in series with both the battery heat exchange unit 5 and the water-side valve island 1. Therefore, water can be independently introduced into the water-side valve island 1 using the four-way valve 9, allowing for temperature mixing of the water in the separate water path of the battery heat exchange unit 5, thus achieving precise temperature control of the battery heat exchange unit 5. In another embodiment, the aforementioned battery heat exchange unit 5 is also connected in series with a kettle 51 for stable control of the water volume in the temperature control water path of the battery heat exchange unit 5.

[0068] Similarly, the water-side valve island 1 is connected to the drive motor heat exchange unit 6. Water at the corresponding temperature is input to the drive motor heat exchange unit 6 through the water-side valve island 1 to control the temperature of the drive motor heat exchange unit 6. The drive motor heat exchange unit 6 is also connected in series with the water-side valve island 1 via the fan heat exchange unit 41. Therefore, in some cases, the heat exchange between the fan heat exchange unit 41 and the outside air can be used to assist in the temperature control of the drive motor heat exchange unit 6.

[0069] The blower 33 is located on one side of the cooler 31 and the heater 32, and is used to blow the low-temperature or high-temperature air that has passed through the cooler 31 and the heater 32 into the passenger compartment. Similarly, the heat exchange fan 42 is located on one side of the fan heat exchange unit 41, and is used to blow the air through the fan heat exchange unit 41 to the outside of the vehicle to achieve heat exchange.

[0070] The following are embodiments of various operating modes that can be realized based on the thermal management system of this utility model. The preset pipeline switching is mainly achieved by controlling the hot water three-way valve 7, the cold water three-way valve 8, the four-way valve 9 and the water-side valve island 1.

[0071] Please see Figure 1 In one operating mode, the system cools the passenger cabin, maintains the temperature of the battery heat exchange unit 5, and dissipates heat from the drive motor heat exchange unit 6. Temperature control refers to keeping the temperature within a certain range, such as 20℃-30℃.

[0072] In this mode, the first water-cooling passage is connected in series with the outlet of the water cooler 22, the first hot water valve 71, the second hot water valve 72, the first valve 11, the ninth valve 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve 18, the third valve 13, and the inlet of the water cooler 22. The coolant flows sequentially through the outlet of the water cooler 22, the first hot water valve 71, the second hot water valve 72, the first valve 11, the ninth valve 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve 18, the third valve 13, and the inlet of the water cooler 22.

[0073] The second water-cooling passage is connected in series with the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the cooler 31, the fifth valve port 18, the fourth valve port 14, the first four-way valve port 91, the second four-way valve port 92, and the inlet of the refrigerator 24. The coolant flows sequentially through the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the cooler 31, the fourth valve port 14, the first four-way valve port 91, the second four-way valve port 92, and the inlet of the refrigerator 24. The coolant flows sequentially through the fourth four-way valve port 94, the battery heat exchange unit 5, and the third four-way valve port 93, so that the battery heat exchange unit 5 is thermally coupled to the four-way valve 9.

[0074] Please see Figure 2 In one of the operating modes, the system dehumidifies the passenger cabin, maintains the temperature of the battery heat exchange unit 5, and dissipates heat from the drive motor heat exchange unit 6. Temperature control refers to keeping the temperature within a certain range, such as 20℃-30℃.

[0075] In this mode, the first water-cooling passage is connected in series with the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the four-way fourth valve 94, the battery heat exchange unit 5, and the four-way third valve 93, so that the battery heat exchange unit 5 is thermally coupled to the four-way valve 9.

[0076] The second water-cooling passage is connected in series with the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the cooler 31, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24. The coolant flows sequentially through the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the cooler 31, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24.

[0077] Specifically, the cooler 31 and heater 32 in the passenger cabin mechanism 3 can be operated intermittently, so that the cooler 31 plays a condensing role, and water in the air condenses in the cooler 31 and is discharged to achieve dehumidification. Then, the heater 32 is used to heat the air that is blown out by the blower 33, so as to maintain the stability of the passenger cabin temperature while ensuring dehumidification, so as to achieve the purpose of regulating humidity without excessive temperature regulation, and avoiding cooling the passenger cabin in environments where cooling is not required.

[0078] Please see Figure 3 In one operating mode, the system heats the passenger cabin, heats the battery heat exchange unit 5, and dissipates heat from the drive motor heat exchange unit 6. Temperature control refers to maintaining the temperature within a certain range, such as 20℃-30℃.

[0079] In this mode, the first water-cooling passage is connected in series with the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. At the same time, after the coolant passes through the four-way first valve 91, a branch also flows through the four-way fourth valve 94, the battery heat exchange unit 5, and the four-way third valve 93, so that the battery heat exchange unit 5 is heated by the branched hot water.

[0080] The second water-cooling passage is connected in series with the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24. The coolant flows sequentially through the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24.

[0081] Please see Figure 4 In one operating mode, the system heats the passenger cabin, recovers waste heat from the battery heat exchange unit 5, and dissipates heat from the drive motor heat exchange unit 6. Temperature control refers to maintaining the temperature within a certain range, such as 20℃-30℃.

[0082] In this mode, the first water-cooling passage is connected in series with the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the four-way fourth valve 94, the battery heat exchange unit 5, and the four-way third valve 93, so that the battery heat exchange unit 5 is thermally coupled to the four-way valve 9.

[0083] The second water-cooling passage is connected in series with the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24. The coolant flows sequentially through the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24.

[0084] Please see Figure 5 In one operating mode, the system provides heating for the passenger cabin, insulation control for the battery heat exchange unit 5, and waste heat recovery for the drive motor heat exchange unit 6. Temperature control refers to maintaining the temperature within a certain range, such as 20℃-30℃.

[0085] In this mode, the first water-cooling passage is connected in series with the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the heater 32, the first valve 11, the fourth valve 14, the four-way first valve 91, the four-way second valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the four-way fourth valve 94, the battery heat exchange unit 5, and the four-way third valve 93, so that the battery heat exchange unit 5 is thermally coupled to the four-way valve 9.

[0086] The second water-cooling passage is connected in series with the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the seventh valve port 17, the heat exchange unit 6 of the drive motor, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24. The coolant flows sequentially through the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the seventh valve port 17, the heat exchange unit 6 of the drive motor, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24.

[0087] Please see Figure 6 In one operating mode, the system ventilates the passenger cabin, heats the battery heat exchange unit 5, and cools the drive motor heat exchange unit 6. Temperature control refers to keeping the temperature within a certain range, such as 20℃-30℃.

[0088] In this mode, the first water-cooling passage is connected in series with the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the first valve 11, the fourth valve 14, the first four-way valve 91, the second four-way valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. The coolant flows sequentially through the outlet of the water cooler 22, the first hot water valve 71, the third hot water valve 73, the first valve 11, the fourth valve 14, the first four-way valve 91, the second four-way valve 92, the third valve 13, the second valve 12, and the inlet of the water cooler 22. At the same time, after the coolant passes through the first four-way valve 91, a branch also flows through the fourth four-way valve 94, the battery heat exchange unit 5, and the third four-way valve 93, so that the battery heat exchange unit 5 is heated by the branched hot water.

[0089] The second water-cooling passage is connected in series with the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24. The coolant flows sequentially through the outlet of the refrigerator 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the refrigerator 24.

[0090] In this embodiment, the passenger cabin mechanism 3 may not participate in operation, thus maintaining ventilation in the passenger cabin.

[0091] Please see Figure 7 In one of the operating modes, the fan heat exchange unit 41 is de-iced.

[0092] In this mode, the second water-cooling passage is connected in series with the outlet of the cooler 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the cooler 24. The coolant flows sequentially through the outlet of the cooler 24, the first cold water valve port 81, the second cold water valve port 82, the fifth valve port 18, the ninth valve port 19, the fan heat exchange unit 41, the drive motor heat exchange unit 6, the eighth valve port 18, the sixth valve port 16, and the inlet of the cooler 24.

[0093] In this embodiment, only the fan heat exchange unit 41 is heated to melt the frost.

[0094] Of course, in addition to the above embodiments, other preset pipeline switching can also be achieved by controlling the hot water three-way valve 7, the cold water three-way valve 8, the four-way valve 9 and the water-side valve island 1. The water cooler 22 is mainly used as the heat source, the refrigerator 24 as the cold source, and the fan heat exchange unit 41 as the source of exchange with the outside temperature, so as to achieve flexible temperature control of the passenger cabin mechanism 3, the battery heat exchange unit 5 and the drive motor heat exchange unit 6. In particular, in this embodiment, by introducing the four-way valve 9, the battery heat exchange unit 5 can be flexibly connected in series with the system or self-circulated. The cooling and heating are controlled by introducing the hot water three-way valve 7 and the cold water three-way valve 8, which is more energy-efficient.

[0095] In this embodiment, the water-side valve island 1 is provided with a total of 9 inlets and outlets that can be freely switched on and off. The water-side valve island 1 itself can be set to electronically control the on and off state to realize the series connection of two corresponding inlets and outlets.

[0096] In this application, the problem of low suction pressure and low flow rate on the suction side of compressor 21 is improved by supplementing gas. In particular, when the ambient temperature is low, the evaporation pressure of the cooler 24 is low, and the suction side pressure of compressor 21 is low, resulting in high discharge side pressure and high discharge temperature of compressor 21, large discharge pressure ratio, and excessive power consumption of compressor 21.

[0097] Meanwhile, with the gas injection and enthalpy enhancement mechanism, during refrigeration operation, the refrigerant in the main circuit is cooled down once in advance by the gas injection and enthalpy enhancement mechanism, which increases the subcooling degree before the expansion valve 23 of the refrigerator, indirectly increasing the refrigeration capacity.

[0098] In another embodiment, the water cooler 22, the liquid storage tank 25, the refrigerator expansion valve 23, the refrigerator 24, and the gas replenishment and enthalpy enhancement mechanism 2 are mounted on the compressor 21 to achieve a high degree of integration, thereby forming a design with the compressor 21 as the center of mass.

[0099] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0100] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0101] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A low-cost thermal management system, characterized in that, The low-cost thermal management system includes: Water-side valve island; A water cooler having a first condensate path and a first water cooling path; The refrigerator has a second condensate passage and a second water cooling passage; The agent-side integrated mechanism includes a compressor, a liquid receiver, a flash tank expansion valve, a flash tank, and a refrigerator expansion valve arranged in series. The flash tank has a first output end and a second output end. The compressor, a first condensate circuit, a liquid receiver, a flash tank expansion valve, an input end and a first output end of the flash tank, a refrigerator expansion valve, and a second condensate circuit are connected in series. The second output end of the flash tank is connected to the compressor through a flash tank branch. The second output end of the flash tank is higher than the first output end of the flash tank. A passenger cabin mechanism, the passenger cabin mechanism including a cooler, a heater, and a blower disposed on one side of the cooler and the heater; The downstream of the water cooler includes a hot water three-way valve, which allows the water cooler to be connected in series with the water-side valve island through a first water-cooling passage, or to be connected in series with the water-side valve island after passing through the heater; the downstream of the chiller includes a cold water three-way valve, which allows the chiller to be connected in series with the water-side valve island through a second water-cooling passage, or to be connected in series with the water-side valve island after passing through the cooler. A fan heat exchange mechanism, comprising a fan heat exchange unit and a heat exchange fan disposed on one side of the fan heat exchange unit; the fan heat exchange unit is connected in series with the water-side valve island.

2. The low-cost thermal management system according to claim 1, characterized in that: The multifunctional thermal management system also includes a battery heat exchange unit and a kettle. The battery heat exchange unit and the kettle are connected in series or thermally coupled to the water-side valve island via a four-way valve. The multifunctional thermal management system also includes a drive motor heat exchange unit. The drive motor heat exchange unit is connected in series with the water-side valve island via the fan heat exchange unit. The drive motor heat exchange unit is also connected in series with the water-side valve island separately.

3. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the fan heat exchange unit, the drive motor heat exchange unit, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the fan heat exchange unit, and the drive motor heat exchange unit in sequence and then returns to the inlet of the water cooler. The second water-cooling passage is connected in series with the refrigerator outlet, the cooler, the four-way valve, and the refrigerator inlet. The coolant flows through the refrigerator outlet, the four-way valve, and the cooler in sequence before returning to the refrigerator inlet. The battery heat exchange unit is thermally coupled to the four-way valve.

4. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, and the four-way valve in sequence before returning to the inlet of the water cooler. The battery heat exchange unit is thermally coupled to the four-way valve. The second water-cooling passage is connected in series with the refrigerator outlet, the cooler, the fan heat exchange unit, the drive motor heat exchange unit, and the refrigerator inlet. The coolant flows through the refrigerator outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler in sequence before returning to the refrigerator inlet.

5. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, and the four-way valve in sequence and then returns to the inlet of the water cooler. The coolant also passes through a separate water passage through the four-way valve and then returns directly to the inlet of the water cooler without passing through the battery heat exchange unit. The second water-cooling passage is connected in series with the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler inlet. The coolant flows sequentially through the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler before returning to the cooler inlet.

6. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, the battery heat exchange unit, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, the four-way valve, and the battery heat exchange unit in sequence before returning to the inlet of the water cooler. The battery heat exchange unit is thermally coupled to the four-way valve. The second water-cooling passage is connected in series with the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler inlet. The coolant flows sequentially through the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler before returning to the cooler inlet.

7. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the heater, the four-way valve, the battery heat exchange unit, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler, the heater, the four-way valve, and the battery heat exchange unit in sequence before returning to the inlet of the water cooler. The battery heat exchange unit is thermally coupled to the four-way valve. The second water-cooling passage is connected in series with the cooler outlet, the drive motor heat exchange unit, and the cooler inlet. The coolant flows through the cooler outlet, the drive motor heat exchange unit, and the cooler in sequence before returning to the cooler inlet.

8. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler and the four-way valve in sequence and then returns to the inlet of the water cooler. The coolant also passes through a separate water passage and the four-way valve and then returns directly to the inlet of the water cooler without passing through the battery heat exchange unit. The second water-cooling passage is connected in series with the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler inlet. The coolant flows sequentially through the cooler outlet, the fan heat exchange unit, the drive motor heat exchange unit, and the cooler before returning to the cooler inlet.

9. The low-cost thermal management system according to claim 2, characterized in that: The first water-cooling passage is connected in series with the outlet of the water cooler, the four-way valve, and the inlet of the water cooler. The coolant passes through the outlet of the water cooler and the four-way valve in sequence and then returns to the inlet of the water cooler. The coolant also passes through a separate water passage and the four-way valve and then returns directly to the inlet of the water cooler without passing through the battery heat exchange unit. The second water-cooling path does not participate in the circulation.

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