A vehicle-mounted air supplementing and enthalpy increasing system

Abstract

The utility model relates to a kind of vehicle-mounted air supplementing enthalpy increasing systems, wherein vehicle-mounted air supplementing enthalpy increasing systems include agent side integrated mechanism, the agent side integrated mechanism includes series connection setting compressor, water cooler, liquid storage tank, refrigerating machine expansion valve, refrigerating machine;The agent side integrated mechanism further includes air supplementing enthalpy increasing mechanism, the air supplementing enthalpy increasing mechanism is arranged between the liquid storage tank with the refrigerating machine expansion valve, and with the input end of the compressor is communicated, the air supplementing enthalpy increasing mechanism is used to separate low-temperature medium-pressure gas from the high-temperature high-pressure refrigerant side of the liquid storage tank, and air supplementing to the compressor.The utility model can be through the intervention of air supplementing enthalpy increasing mechanism, and air supplementing is assisted in compressor, and it is assisted in normal use under extreme weather.

Description

Technical Field

[0001] This utility model relates to a thermal management system, and more particularly to an on-board gas replenishment and enthalpy enhancement 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 a vehicle's thermal management system, it generally consists of several main functions: refrigerant compression, cold air delivery or discharge, and hot air delivery or discharge. In some scenarios, the LCC (water cooler) is used as the condenser of the original thermal management system, and the Chiller (cooler) is used as the evaporator. By intelligently controlling the circulation path of the refrigerant and coolant, efficient cooling, heating and energy recovery can be achieved, which is especially suitable for electric vehicles and hybrid vehicles.

[0004] In real-world applications, such as under extreme low-temperature conditions, the low evaporation pressure of the heat pump can lead to a low suction density in the compressor, resulting in a reduced refrigerant mass flow rate and a high exhaust temperature. This forces the compressor to operate under high load, affecting its temperature regulation capabilities and even its lifespan. Furthermore, considering the high integration requirements of thermal management systems in electric and hybrid vehicles, current designs, taking into account cost and pipeline layout, generally feature a simple coolant pipeline layout, which may further limit their onboard temperature regulation capabilities.

[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 vehicle-mounted gas replenishment and enthalpy enhancement system that can assist in replenishing gas to the compressor through the intervention of the gas replenishment and enthalpy enhancement mechanism, thereby aiding in normal use under extreme weather conditions.

[0007] To achieve the above objectives, this utility model discloses a vehicle-mounted gas replenishment and enthalpy enhancement system, the vehicle-mounted gas replenishment and enthalpy enhancement system comprising:

[0008] The refrigerant-side integrated mechanism includes a compressor, a water cooler, a liquid receiver, a refrigerant expansion valve, and a refrigerant arranged in series. The refrigerant-side integrated mechanism also includes a gas replenishment and enthalpy enhancement mechanism, which is located between the liquid receiver and the refrigerant expansion valve and is connected to the input end of the compressor. The gas replenishment and enthalpy enhancement mechanism is used to cool and depressurize the high-temperature and high-pressure refrigerant from the liquid receiver and then deliver it to the compression chamber of the compressor for gas replenishment.

[0009] As a further description of the above technical solution, the water cooler has a first condensate path and a first water cooling path, the refrigerator has a second condensate path and a second water cooling path, the gas replenishment and enthalpy enhancement mechanism includes a plate heat exchanger, the plate heat exchanger includes a thermally coupled plate heat exchanger main path and a plate heat exchanger branch path, the compressor, the first condensate path, the liquid storage tank, the plate heat exchanger main path, the refrigerator expansion valve, and the second condensate path are arranged in series, the input end of the plate heat exchanger branch path is connected to a pipe for connecting the plate heat exchanger and the refrigerator expansion valve through a first flow channel, and a plate heat exchanger expansion valve is provided on the first flow channel; the other end of the plate heat exchanger branch path is connected to the input end of the compressor through a second flow channel.

[0010] As a further description of the above technical solution, the water cooler has a first condensate path and a first water cooling path, the refrigerator has a second condensate path and a second water cooling path, the gas replenishment and enthalpy enhancement mechanism includes a flash tank, the flash tank has a first output end and a second output end, wherein the compressor, water cooler, liquid storage tank, flash tank expansion valve, flash tank input end and first output end, refrigerator expansion valve, and refrigerator 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.

[0011] As a further description of the above technical solution, the on-board air replenishment and enthalpy enhancement system also includes a water-side valve island, a passenger compartment mechanism, a fan heat exchange mechanism, a battery heat exchange unit, and a drive motor heat exchange unit; the passenger compartment mechanism includes a cooler, a heater, and a blower disposed on one side of the cooler and the heater; the cooler and the heater are connected in series with the water-side valve island; the fan heat exchange mechanism includes 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; the battery heat exchange unit is connected in series with or thermally coupled to the water-side valve island via a four-way valve; the drive motor heat exchange unit is connected in series with the water-side valve island.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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 and the drive motor heat exchange unit in sequence and then returns to the cooler inlet.

[0022] As a further description of the above technical solution, the water cooler, the liquid storage tank, the cooler expansion valve, the cooler, and the gas replenishment and enthalpy enhancement mechanism are installed on the compressor.

[0023] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0024] This utility model discloses an on-board gas injection and enthalpy enhancement system. Through a gas injection and enthalpy enhancement mechanism installed in the refrigerant-side integrated mechanism, it can inject gas into the compressor, improving the system's temperature regulation capability. In this utility model, the refrigerant-side integrated mechanism is integrated solely for refrigerant flow, ensuring high safety. Simultaneously, integrating the gas injection and enthalpy enhancement mechanism into the refrigerant-side integrated mechanism enables continuous enthalpy injection into the compressor, improving suction capacity, reducing the compressor's front and rear discharge pressure ratio, and lowering power consumption. This allows for stable compressor suction even under extreme driving conditions.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the passenger compartment cooling of an on-board air replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0028] Figure 2 This is a schematic diagram of a vehicle-mounted air replenishment and enthalpy enhancement system for dehumidifying the passenger compartment, as provided in the embodiments of this specification.

[0029] Figure 3 This is a schematic diagram of passenger compartment heating for an on-board air replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0030] Figure 4 This is a schematic diagram of the residual temperature of the battery heat exchange unit in an on-board gas replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0031] Figure 5 This is a schematic diagram of the residual temperature of the heat exchange unit of the recovery drive motor of an on-board air replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0032] Figure 6 This is a schematic diagram of the battery heat exchange unit heating of an on-board gas replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0033] Figure 7 This is a schematic diagram of the de-icing of the fan heat exchange unit of a vehicle-mounted air replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0034] Figure 8 This is a schematic diagram of a flash tank for an on-board gas replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0035] Figure 9 This is a schematic diagram of the valve port markings for an on-board air replenishment and enthalpy enhancement system provided in the embodiments of this specification;

[0036] In the picture:

[0037] 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;

[0038] 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. Plate heat exchanger; 261. Third sensor; 27. Plate heat exchanger expansion valve; 28. Fourth sensor; 29. ​​Fifth sensor; 260. Flash tank; 2601. Flash tank expansion valve; 2602. Temperature sensor;

[0039] 3. Passenger cabin mechanism; 31. Cooler; 32. Heater; 33. Blower;

[0040] 4. Fan heat exchange mechanism; 41. Fan heat exchange unit; 42. Heat exchange fan;

[0041] 5. Battery heat exchange unit; 51. Water bottle;

[0042] 6. Drive motor heat exchange unit;

[0043] 7. Hot water three-way valve; 71. Hot water first valve port; 72. Hot water second valve port; 73. Hot water third valve port;

[0044] 8. Cold water three-way valve; 81. Cold water first valve port; 82. Cold water second valve port; 83. Cold water third valve port;

[0045] 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;

[0046] 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

[0047] 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.

[0048] 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.

[0049] 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 in this document should, depending on the context, include any combination of one or more of the related listed items.

[0050] Please see Figure 1 This embodiment provides an on-board gas replenishment and enthalpy enhancement system, which includes:

[0051] Water-side valve island 1;

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The water 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, while the chiller 24 is mainly used to supply low-temperature water to the water-side valve island 1. The high-temperature water provided by the chiller 22 can be used to heat or dissipate heat from the corresponding heat exchange components in the passenger cabin mechanism 3 and the fan heat exchange mechanism 4 when needed; the low-temperature water provided by the chiller 24 can be used to cool the corresponding heat exchange components in the passenger cabin mechanism 3 and the fan heat exchange mechanism 4 when needed.

[0059] Meanwhile, in this utility model, during the operation of the above-mentioned agent-side integrated mechanism 2, the gas replenishment and enthalpy enhancement mechanism can cool and depressurize a portion of the high-temperature and high-pressure refrigerant and then transport it back to the compressor to achieve gas replenishment. The gas replenishment and enthalpy enhancement mechanism can include two forms: plate heat exchanger and flash tank.

[0060] A portion of the refrigerant enters the expansion valve 23 of the refrigeration unit for throttling, while another portion of the refrigerant passes through the gas replenishment and enthalpy enhancement mechanism and is input into the compressor 21, thereby achieving continuous gas replenishment and enthalpy enhancement for the compressor. Specifically, this application provides the following two gas replenishment and enthalpy enhancement structures.

[0061] Please see Figure 1This is to achieve gas replenishment and enthalpy enhancement using a plate heat exchanger 26. The gas replenishment and enthalpy enhancement mechanism includes a plate heat exchanger expansion valve 27, a plate heat exchanger 26, a thermally coupled main plate heat exchanger circuit and a plate heat exchanger branch circuit. The compressor 21, the water cooler 22, the liquid storage tank 25, the main plate heat exchanger circuit, the cooler expansion valve 23, and the cooler 24 are arranged in series. The input end of the plate heat exchanger branch circuit is connected to a pipe for connecting the plate heat exchanger 26 and the cooler expansion valve 23 through a first flow channel. The plate heat exchanger expansion valve 27 is installed on the first flow channel. The other end of the plate heat exchanger branch circuit is connected to the input end of the compressor through a second flow channel. During the operation of the aforementioned refrigerant-side integrated mechanism 2, a portion of the refrigerant in the plate heat exchanger 26 enters the refrigeration expansion valve 23 for throttling, while the remaining refrigerant enters the plate heat exchanger expansion valve 27 via a branch of the plate heat exchanger for throttling. The low-temperature, low-pressure refrigerant formed after expansion and pressure reduction through the plate heat exchanger expansion valve 27 directly enters the plate heat exchanger 26, where it exchanges heat with the upstream high-temperature, high-pressure refrigerant. This allows the high-temperature, high-pressure refrigerant flowing into the refrigeration expansion valve 23 to be cooled in advance, increasing the subcooling before the valve and indirectly improving the cooling / heating capacity of the refrigerant after passing through the refrigeration expansion valve 23. Simultaneously, this allows the compressor 21 to be injected with refrigerant from the middle, rather than all of it from the refrigeration 24 side, to avoid excessively low pressure of the refrigerant injected from the refrigeration 24 side under extreme weather conditions, which could affect the normal operation of the compressor 21. Therefore, in this embodiment, the plate heat exchanger 26 installed in the refrigerant-side integrated mechanism can achieve enthalpy enhancement through gas replenishment, thereby improving the system's temperature regulation capability. In this invention, the refrigerant-side integrated mechanism 2 is integrated solely for the flow of refrigerant, offering high safety. Simultaneously, the plate heat exchanger 26, integrated into the refrigerant-side integrated mechanism 2, enables intermediate injection into the compressor 21, achieving continuous enthalpy replenishment and assisting in reducing the refrigerant temperature leading to the refrigerator 24, thus achieving the effect of enthalpy enhancement through gas replenishment. This is more energy-efficient and suitable for extreme environments. In this embodiment, the water-side valve island 1 with multiple outlets also allows for flexible mixing of water flow and pipeline organization, providing practical flexibility.

[0062] In this gas replenishment and enthalpy-increasing mechanism based on the plate heat exchanger 26 structure, multiple sensors are also used to adjust the plate heat exchanger 26. Specifically, for example... Figure 1As shown, in this embodiment, a first sensor 211 and a second sensor 212 are connected in series before and after the compressor 21 to monitor the pressure difference and temperature upstream and downstream of the compressor 21. Simultaneously, a third sensor 261 is also included between the plate heat exchanger 26 and the compressor 21 to monitor the pressure and temperature of the refrigerant in the plate heat exchanger 26 pipeline. With the assistance of these three sets of pressure and temperature sensors, the refrigerant in the compressor 21 is monitored from three separate paths connected to the compressor 21, allowing for flexible adjustment of the refrigerant flow rate and ensuring stable operation of the compressor 21. Alternatively, a temperature sensor can be installed downstream of the plate heat exchanger 26, and a corresponding temperature sensor can also be installed downstream of the plate heat exchanger expansion valve 27 to monitor the actual heat exchange efficiency of the plate heat exchanger 26 and ensure that the heat exchange efficiency of the plate heat exchanger 26 meets operational requirements. Figure 1 As shown, in this embodiment, a fourth sensor 28 is installed after the main circuit of the plate heat exchanger, and a fifth sensor 29 is installed after the branch circuit of the plate heat exchanger; both are temperature sensors. In actual operation, firstly, a preset injection gas temperature difference and a preset injection gas pressure value can be provided according to actual needs. The temperature Tmo between the main circuit of the plate heat exchanger and the expansion valve of the refrigerant, and the temperature Tai between the branch circuit of the plate heat exchanger and the expansion valve of the plate heat exchanger are monitored by the temperature sensors, and the difference between Tmo and Tai is calculated. The pressure Pm between the branch circuit of the plate heat exchanger and the compressor is monitored by the pressure-temperature sensor. The difference between Tmo and Tai is compared with a preset difference. If the difference between Tmo and Tai is not equal to the preset difference, the plate heat exchanger expansion valve is controlled to adjust the refrigerant temperature of the branch circuit. Similarly, Pm is compared with a preset injection gas pressure value. If Pm is not equal to the preset pressure value, the plate heat exchanger expansion valve is controlled to adjust the refrigerant pressure of the branch circuit. For example, in the control method described above, the preset superheat can be set to 5K. Therefore, if the calculation shows that Tmo-Tai = 5K, there is no need to adjust the plate heat exchanger expansion valve 27; otherwise, adjustment is required. Specifically, this involves reducing the refrigerant flow rate to increase the superheat, or increasing the flow rate to decrease the superheat.

[0063] Please see Figure 8This is to achieve gas replenishment and enthalpy enhancement using a flash tank 260. The gas replenishment and enthalpy enhancement mechanism includes a flash tank expansion valve 2601 and a flash tank 260. The flash tank 260 has a first output end and a second output end. The compressor 21, water cooler 22, liquid receiver 25, cooler expansion valve 23, the input end and first output end of the flash tank 260, the cooler expansion valve 23, and the cooler 24 are connected in series. The second output end of the flash tank 260 is connected to the compressor 21 through a flash tank branch. The second output end of the flash tank 260 is higher than the first output end of the flash tank 260. [The last sentence appears to be incomplete and possibly refers to a specific configuration or process.] During the operation of the assembly 2, after initial expansion and pressure reduction through the flash tank expansion valve 2601, the liquid refrigerant in the flash tank 260 enters the refrigerator expansion valve 23 for secondary throttling and cooling. The remaining gaseous refrigerant is directly re-injected into the compressor 21 to replenish enthalpy. This allows the compressor 21 to receive refrigerant intermediately, instead of all refrigerant being injected from the refrigerator 24 side. This prevents the pressure of the refrigerant injected from the refrigerator 24 side 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 260 connected in parallel within the refrigerant-side integrated mechanism can achieve gas replenishment and enthalpy enhancement, improving the system's temperature regulation capability. In this invention, the integrated refrigerant-side mechanism 2 is used solely for refrigerant flow, ensuring high safety. Simultaneously, integrating the flash tank 260 into the refrigerant-side integrated mechanism 2 enables intermediate injection into the compressor 21, achieving continuous enthalpy replenishment, which is more energy-efficient and suitable for extreme environments.

[0064] In the gas replenishment and enthalpy enhancement mechanism based on flash tank 260, a temperature sensor 2602 can be connected in series between flash tank 260 and the refrigerator expansion valve 23. Therefore, the temperature of the liquid refrigerant discharged in flash tank 260 can be detected to coordinate the flow control between refrigerator expansion valve 23 and flash tank expansion valve 2601.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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℃.

[0070] 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.

[0071] 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.

[0072] 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℃.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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℃.

[0077] 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.

[0078] 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.

[0079] 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℃.

[0080] 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.

[0081] 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.

[0082] 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℃.

[0083] 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.

[0084] 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.

[0085] 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℃.

[0086] 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.

[0087] 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.

[0088] In this embodiment, the passenger cabin mechanism 3 may not participate in operation, thus maintaining ventilation in the passenger cabin.

[0089] Please see Figure 7 In one of the operating modes, the fan heat exchange unit 41 is de-iced.

[0090] 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.

[0091] In this embodiment, only the fan heat exchange unit 41 is heated to melt the frost.

[0092] 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.

[0093] 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.

[0094] In this application, the low suction pressure and small flow rate on the suction side of compressor 21 are improved by supplementing gas. Especially when the ambient temperature is low, it solves the problem that the low evaporation pressure of the cooler 24 leads to low suction side pressure of compressor 21, resulting in high exhaust temperature of compressor 21, large discharge pressure ratio and excessive power consumption of compressor 21. It can significantly improve the heating capacity of compressor 21 at low temperatures and improve the riding experience of electric vehicles and hybrid vehicles.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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 vehicle-mounted air replenishment and enthalpy enhancement system, characterized in that, The vehicle-mounted gas replenishment and enthalpy enhancement system includes: The refrigerant-side integrated mechanism includes a compressor, a water cooler, a liquid receiver, a refrigerant expansion valve, and a refrigerant arranged in series. The refrigerant-side integrated mechanism also includes a gas replenishment and enthalpy enhancement mechanism, which is located between the liquid receiver and the refrigerant expansion valve and is connected to the input end of the compressor. The gas replenishment and enthalpy enhancement mechanism is used to cool and depressurize the high-temperature and high-pressure refrigerant from the liquid receiver and then deliver it to the compression chamber of the compressor for gas replenishment.

2. The vehicle-mounted gas replenishment and enthalpy enhancement system according to claim 1, characterized in that: The water cooler has a first condensate path and a first water-cooling path, and the refrigerator has a second condensate path and a second water-cooling path. The gas replenishment and enthalpy enhancement mechanism includes a plate heat exchanger, which includes a thermally coupled plate heat exchanger main path and a plate heat exchanger branch path. The compressor, the first condensate path, the liquid storage tank, the plate heat exchanger main path, the refrigerator expansion valve, and the second condensate path are connected in series. The input end of the plate heat exchanger branch path is connected to a pipe for connecting the plate heat exchanger and the refrigerator expansion valve through a first flow channel. The plate heat exchanger expansion valve is provided on the first flow channel. The other end of the plate heat exchanger branch path is connected to the input end of the compressor through a second flow channel.

3. The vehicle-mounted air replenishment and enthalpy enhancement system according to claim 1, characterized in that: The water cooler has a first condensate path and a first water cooling path, and the refrigerator has a second condensate path and a second water cooling path. The gas replenishment and enthalpy enhancement mechanism includes a flash tank, which has a first output end and a second output end. The compressor, water cooler, liquid storage tank, flash tank expansion valve, flash tank input end and first output end, refrigerator expansion valve, and refrigerator 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.

4. The vehicle-mounted air replenishment and enthalpy enhancement system according to any one of claims 2 or 3, characterized in that: The on-board air replenishment and enthalpy enhancement system further includes a water-side valve island, a passenger compartment mechanism, a fan heat exchange mechanism, a battery heat exchange unit, and a drive motor heat exchange unit. The passenger compartment mechanism includes a cooler, a heater, and a blower disposed on one side of the cooler and the heater. The cooler and the heater are connected in series with the water-side valve island. The fan heat exchange mechanism includes 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. The battery heat exchange unit is connected in series with or thermally coupled to the water-side valve island via a four-way valve. The drive motor heat exchange unit is connected in series with the water-side valve island.

5. The vehicle-mounted gas replenishment and enthalpy enhancement system according to claim 4, 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.

6. The vehicle-mounted gas replenishment and enthalpy enhancement system according to claim 4, 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.

7. The vehicle-mounted air replenishment and enthalpy enhancement system according to claim 4, 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.

8. The vehicle-mounted air replenishment and enthalpy enhancement system according to claim 4, 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.

9. The vehicle-mounted air replenishment and enthalpy enhancement system according to claim 1, characterized in that: The water cooler, the liquid storage tank, the cooler expansion valve, the cooler, and the gas replenishment and enthalpy enhancement mechanism are mounted on the compressor.

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