Defrosting system, method and device for heat exchanger outside vehicle and computer equipment

Abstract

The invention relates to the technical field of automobile heat management, and discloses an external heat exchanger defrosting system, method and device and computer equipment. According to the system, a gas-liquid separator is connected with a compressor through a first pipeline; the battery pack heat exchanger is connected with the compressor through a second pipeline, a first electromagnetic valve located on the second pipeline is opened, and the opening degree of a first expansion valve is reduced; the waste heat recovery plate is connected with the battery pack heat exchanger through a third pipeline and a fourth pipeline and connected with the gas-liquid separator through a fifth pipeline, and the opening degree of a second expansion valve located on the third pipeline is increased. The motor electric control heat recovery device is connected with the waste heat recovery plate; the outside-vehicle heat exchanger is connected with the second pipeline and the third pipeline through a sixth pipeline and a seventh pipeline correspondingly, a second electromagnetic valve located on the sixth pipeline is opened, and the opening degree of a fourth expansion valve located on the seventh pipeline is increased. According to the technical scheme, waste heat from the battery pack, the motor and the electric control device can be recycled, and the overall energy utilization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile thermal management, and in particular to a defrosting system, method, device and computer equipment for an off-vehicle heat exchanger. Background Art

[0002] New energy vehicles are an important development trend in the entire automotive industry. Since new energy vehicles use batteries as a power source, keeping the batteries within a suitable temperature range is the key to ensuring the stable performance, safety and reliability of new energy vehicles.

[0003] At present, heat pump systems are widely used in battery heating and passenger compartment heating in new energy vehicles as an efficient and energy-saving heating method. However, when the heat pump system is operated under low temperature conditions in winter, the external heat exchanger used as an evaporator will be frosted, especially in areas with high humidity, which greatly reduces the comfort of people in the car and also increases the energy consumption of the automobile heat pump system. Summary of the invention

[0004] In view of this, the present invention provides a defrosting system, method, device and computer equipment for an off-vehicle heat exchanger to solve the problem of frosting on the off-vehicle heat exchanger.

[0005] In the first aspect, the present invention provides an off-vehicle heat exchanger defrosting system, which, when the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electronically controlled heat recovery device is greater than the first temperature threshold, includes: a compressor having a first inlet and a first outlet; a gas-liquid separator having a second inlet and a second outlet, the second outlet being connected to the first inlet through a first pipeline; a battery pack heat exchanger, arranged on the side of the battery pack; the battery pack heat exchanger having a third inlet and a third outlet; the third inlet is connected to the first outlet through a second pipeline, and the third outlet is connected to the third pipeline; a waste heat recovery plate having a fourth inlet, a fourth outlet, a fifth inlet and a fifth outlet, the fourth inlet is connected to a fourth pipeline, the fourth pipeline is connected to the third pipeline; the fourth outlet is connected to the second inlet through the fifth pipeline; a motor electronically controlled heat recovery device having a sixth inlet and a sixth outlet, the sixth inlet The inlet is connected to the fifth outlet, and the sixth outlet is connected to the fifth inlet; the outdoor heat exchanger has a seventh inlet and a seventh outlet, the seventh inlet is connected to the sixth pipeline, and the sixth pipeline is connected to the second pipeline; the seventh outlet is connected to the seventh pipeline, and the seventh pipeline is also connected to the third pipeline; wherein the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the sixth pipeline are all provided with refrigerant; the first solenoid valve located on the second pipeline is in an open state, and the first expansion valve located on the second pipeline is in a reduced opening state; the second expansion valve located on the third pipeline is in an increased opening state; the third expansion valve located on the fourth pipeline is in a reduced opening state; the second solenoid valve located on the sixth pipeline is in an open state; the fourth expansion valve located on the seventh pipeline is in an increased opening state; the water pump included in the motor-controlled heat recovery device is in an open state.

[0006] The off-vehicle heat exchanger defrost system provided by the embodiment of the present invention can effectively utilize the waste heat of the motor-controlled heat recovery device to ensure rapid defrosting under the first defrost condition through optimized piping and component configuration. Based on the outlet water temperature and the set temperature threshold, the system can flexibly adjust the operating state to improve energy efficiency and defrosting effect. Through reasonable pipeline connections, multiple components work together to ensure efficient flow and heat exchange of refrigerant. The state settings of the solenoid valve and expansion valve in the system can be automatically adjusted according to the real-time operating conditions, which enhances the response speed and adaptability of the system. The multiple valves and sensors included can monitor and adjust the fluid state to enhance the safety and stability of operation. Through the design of waste heat recovery, the existing heat is utilized to the maximum extent, energy consumption is reduced, and overall energy efficiency is improved.

[0007] In an optional embodiment, when the defrost condition is the second defrost condition and the current outlet water temperature is greater than the first temperature threshold, the system also includes: an in-vehicle heat exchanger, having an eighth inlet and an eighth outlet, the eighth inlet is connected to the eighth pipeline, and the eighth pipeline is also connected to the second pipeline; the eighth outlet is connected to the ninth pipeline, and the ninth pipeline is also connected to the third pipeline; wherein refrigerant is also arranged in the eighth pipeline and the ninth pipeline; the third solenoid valve located on the eighth pipeline and the fourth solenoid valve located on the ninth pipeline are in an open state.

[0008] The external heat exchanger defrost system provided by the embodiment of the present invention not only supports external defrosting, but also can provide heat inside the vehicle, which helps to realize an integrated temperature control system and improve the overall performance of the vehicle. Through the in-vehicle heat exchanger, heat can be effectively transferred to the interior of the vehicle to enhance the comfort of passengers. By recovering and reusing waste heat, the system can effectively improve the utilization efficiency of heat, reduce energy consumption, and optimize energy efficiency. The integration of the in-vehicle heat exchanger enables the system to flexibly adjust the temperature inside the vehicle according to different working conditions to meet different needs.

[0009] In an optional embodiment, when the defrost condition is the third defrost condition, the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, the system also includes: a tenth pipeline, one end of the tenth pipeline is connected to the fifth pipeline and the other end is connected to the second pipeline; wherein, refrigerant is also provided in the tenth pipeline; the fifth solenoid valve on the tenth pipeline is in an open state; the first solenoid valve changes from an open state to a closed state; the first expansion valve changes from a reduced opening state to an increased opening state; the second expansion valve changes from an increased opening state to a reduced opening state; the third expansion valve and the fourth expansion valve change to a normal state.

[0010] The off-vehicle heat exchanger defrost system provided by the embodiment of the present invention can effectively utilize heat, optimize the temperature management of the battery, and improve its performance and life when the battery temperature of the battery pack is higher than the second temperature threshold. By dynamically adjusting the state of the solenoid valve and the expansion valve under different working conditions, the system can flexibly adapt to temperature changes according to real-time conditions to ensure optimal working conditions. The introduction of the tenth pipeline can more effectively utilize the refrigerant cycle, reduce energy consumption, improve overall energy efficiency, and reduce dependence on external energy sources. By reasonably setting the working states of the solenoid valve and the expansion valve, the system can simplify the control strategy, improve the response speed, and enhance the real-time adjustment capability of the system. Dynamic adjustment of the valve state can reduce the instability of fluid flow, thereby improving the stability and reliability of the entire system.

[0011] In an optional embodiment, the motor electronically controlled heat recovery device also includes: a motor radiator, arranged on the side of the motor; an electronically controlled radiator, arranged on the side of the electrical control device; wherein the electronically controlled radiator and the motor radiator are connected in parallel, and have a first port and a second port; an engine radiator, having a third port and a fourth port, and the third port of the engine radiator is connected to the first port through a pipeline; a first three-way valve, having a first valve, a second valve and a third valve, the first valve is connected to the fourth port through a pipeline, the second valve is connected to the first port through a pipeline, and the third valve is connected to the fifth port of the water pump through a pipeline; a second three-way valve, having a fourth valve, a fifth valve and a sixth valve, the fourth valve is connected to the sixth port of the water pump through a pipeline, the fifth valve is connected to the second port through a pipeline, and the sixth valve is connected to the fifth inlet through a pipeline.

[0012] The off-vehicle heat exchanger defrosting system provided by the embodiment of the present invention can more effectively recover the heat generated by the motor and the electronic control device by connecting the motor radiator and the electronic control radiator in parallel, thereby improving the overall heat recovery efficiency. The flow path of the cooling medium can be flexibly adjusted according to the working state, thereby optimizing the cooling effect of the motor and the electronic control device to prevent overheating. Utilizing the first and second three-way valves, the system can dynamically adjust the heat distribution according to the real-time temperature and working state, and improve the adaptability to different working conditions. By effectively recovering and utilizing heat, the system can reduce dependence on external cooling or heating sources, thereby reducing energy consumption and improving energy efficiency.

[0013] In a second aspect, the present invention provides a defrosting method for an outdoor heat exchanger, which is applied to the outdoor heat exchanger defrosting system of the first aspect mentioned above. When the defrost condition is the first defrost condition and the current outlet water temperature of the motor electronically controlled heat recovery device is greater than the first temperature threshold, it includes: recovering the heat generated by the motor electronically controlled heat recovery device through the refrigerant in the waste heat recovery plate; the refrigerant with recovered heat is sequentially passed through a gas-liquid separator, a compressor and a battery pack heat exchanger to heat the battery pack, and the outdoor heat exchanger is defrosted sequentially through the gas-liquid separator, the compressor and the outdoor heat exchanger.

[0014] The defrosting method for an off-vehicle heat exchanger provided in an embodiment of the present invention utilizes the refrigerant in the waste heat recovery plate to recover heat, thereby heating the battery pack and defrosting the off-vehicle heat exchanger, thereby improving energy utilization efficiency by recovering the waste heat generated by the motor and the electronic control to heat the battery pack and defrost the off-vehicle heat exchanger. By heating the battery pack and keeping the battery operating within the optimal operating temperature range, the performance of the battery can be improved and its life can be extended. Through effective defrosting of the off-vehicle heat exchanger, the normal operation of the off-vehicle heat exchanger in a cold environment is ensured, the decrease in heat exchange efficiency due to frost accumulation is avoided, and the operating safety of the vehicle is enhanced.

[0015] In an optional embodiment, the first solenoid valve located in the second pipeline, the second solenoid valve located in the sixth pipeline, and the water pump included in the motor-controlled heat recovery device are controlled to start; the second expansion valve located in the third pipeline and the fourth expansion valve located in the seventh pipeline are controlled to increase their opening; the first expansion valve located in the second pipeline and the third expansion valve located in the fourth pipeline are controlled to reduce their opening.

[0016] In the defrosting method for an off-vehicle heat exchanger provided by an embodiment of the present invention, adjusting the opening of the expansion valve can effectively control the flow of the refrigerant, thereby optimizing the energy efficiency of the system and reducing unnecessary energy loss. Turning on the water pump and appropriately increasing the opening of the expansion valve can help to quickly improve the heat transfer efficiency, speed up the defrosting process, and improve driving safety. Through the flexible control of the solenoid valve and the expansion valve, the system can quickly respond to environmental changes, achieve rapid adjustment, and improve overall performance.

[0017] In an optional embodiment, the vehicle external heat exchanger defrost system also includes an in-vehicle heat exchanger, a third solenoid valve and a fourth solenoid valve; the in-vehicle heat exchanger has an eighth inlet and an eighth outlet, the eighth inlet is connected to an eighth pipeline, and the eighth pipeline is connected to the second pipeline; the eighth outlet is connected to a ninth pipeline, and the ninth pipeline is connected to the third pipeline; when the defrost condition is the second defrost condition and the current outlet water temperature is greater than the first temperature threshold, the method also includes: controlling the third solenoid valve located in the eighth pipeline and the fourth solenoid valve located in the ninth pipeline to open.

[0018] The defrosting method for an off-vehicle heat exchanger provided by an embodiment of the present invention can increase the flow of heat, quickly remove the frost layer on the off-vehicle heat exchanger, and shorten the defrosting time by controlling the opening of the solenoid valve under the second defrosting condition. The heat of the on-vehicle heat exchanger can be flexibly distributed to ensure the thermal management effect inside and outside the vehicle. By accurately controlling the operating state of the system, unnecessary energy consumption can be reduced and the overall energy efficiency can be improved. It can quickly respond to temperature changes, adjust the heat flow by adjusting the opening state of the solenoid valve, and improve the dynamic adjustment ability of the system.

[0019] In an optional embodiment, the vehicle external heat exchanger defrost system also includes a tenth pipeline and a fifth solenoid valve; one end of the tenth pipeline is connected to the fifth pipeline and the other end is connected to the second pipeline; when the defrost condition is the third defrost condition, the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, the method also includes: controlling the fifth solenoid valve located in the tenth pipeline to open, and controlling the first solenoid valve to close; controlling the first expansion valve to change from a reduced opening state to an increased opening state, controlling the second expansion valve to change from an increased opening state to a reduced opening state, and controlling the third expansion valve and the fourth expansion valve to change to a normal state.

[0020] The defrosting method for an off-vehicle heat exchanger provided in an embodiment of the present invention responds to the third defrosting condition by introducing the tenth pipeline and the fifth solenoid valve, as well as the precise control of the solenoid valve and the expansion valve, thereby monitoring the battery temperature and adjusting the flow direction and flow rate of the cooling medium in a timely manner. This method helps to prevent the battery pack from overheating or being affected by inappropriate temperatures, thereby protecting the battery pack and extending its service life. At the same time, the precise control of the operation of each solenoid valve and the expansion valve makes the defrosting process more efficient, ensures that the off-vehicle heat exchanger maintains good working performance in a cold environment, and improves driving safety.

[0021] In a third aspect, the present invention provides a defrosting device for an outdoor heat exchanger, comprising: a recovery module for recovering heat through the refrigerant in a motor-controlled heat recovery device; a temperature adjustment module for recovering the refrigerant with heat to heat the battery pack through a waste heat recovery plate, a gas-liquid separator, a compressor and a battery pack heat exchanger in sequence, and to defrost the outdoor heat exchanger through a waste heat recovery plate, a gas-liquid separator, a compressor and an outdoor heat exchanger in sequence.

[0022] In a fourth aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for defrosting an external vehicle heat exchanger of the second aspect or any corresponding embodiment thereof by executing the computer instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic diagram of a defrosting system for an off-vehicle heat exchanger according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of another vehicle exterior heat exchanger defrosting system according to an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of another vehicle exterior heat exchanger defrosting system according to an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a motor electronically controlled heat recovery device according to an embodiment of the present invention;

[0028] Figure 5 is a schematic flow chart of a method for defrosting an external heat exchanger according to an embodiment of the present invention;

[0029] Figure 6 is a schematic flow chart of another method for defrosting an external heat exchanger according to an embodiment of the present invention;

[0030] Figure 7 is a schematic flow chart of another method for defrosting an off-vehicle heat exchanger according to an embodiment of the present invention;

[0031] Figure 8 is a schematic flow chart of another method for defrosting an off-vehicle heat exchanger according to an embodiment of the present invention;

[0032] Fig. 9 is a structural block diagram of a defrosting device for an external heat exchanger according to an embodiment of the present invention;

[0033] Fig.10 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] New energy vehicles include electric vehicles and hybrid vehicles, which are an important development trend in the development of the entire automotive industry. Since new energy vehicles use batteries as power sources, battery temperature management is particularly important. In the cold winter environment, the working efficiency of the battery will be affected, so an effective heating system is needed to ensure the normal operation of the battery.

[0036] As an efficient and energy-saving heating method, the heat pump system is widely used in battery heating and passenger compartment heating in new energy vehicles. Through the heat pump system, low-temperature heat can be absorbed from the external environment and converted into high-temperature heat for heating the battery and the interior space of the vehicle, improving the driving comfort and driving range of the vehicle in winter.

[0037] At present, when the heat pump system operates under low temperature conditions in winter, the outdoor heat exchanger used as an evaporator will experience frost, especially in areas with high humidity. This greatly reduces the comfort of people in the car and also increases the energy consumption of the car heat pump system.

[0038] In view of this, when the outdoor heat exchanger of the technical solution of the present invention needs to be defrosted, the battery waste heat, the motor and electronic control waste heat and the heat generated by the motor and electronic control in the low-efficiency mode can be used as the heat source for the evaporator in the heat pump system. At the same time, the indoor heat exchanger can continuously heat the vehicle compartment, ensuring the comfort of the passenger compartment while improving the heating efficiency in winter.

[0039] In this embodiment, a defrosting system for an off-vehicle heat exchanger is provided. When the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electronically controlled heat recovery device is greater than the first temperature threshold, Figure 1 As shown, the system includes: a compressor 1, a gas-liquid separator 2, a battery pack heat exchanger 3, a waste heat recovery plate 4, a motor electronically controlled heat recovery device 5 and an off-vehicle heat exchanger 6.

[0040] The compressor 1 has a first inlet and a first outlet.

[0041] The compressor 1 inhales the low-temperature and low-pressure refrigerant delivered by the gas-liquid separator 2 through the first inlet, and inputs the compressed high-temperature and high-pressure gas through the first outlet to the battery pack heat exchanger 3 and the off-vehicle heat exchanger 6. The refrigerant may be Freon (chlorofluorocarbon refrigerant, such as R-22, R-134a), ammonia, carbon dioxide, etc., which are not limited here.

[0042] The gas-liquid separator 2 has a second inlet and a second outlet, and the second outlet is connected to the first inlet through a first pipeline.

[0043] The gas-liquid separator 2 is used to separate the liquid refrigerant and the gaseous refrigerant in the high-temperature and high-pressure gas discharged from the waste heat recovery plate 4, ensuring that only the gaseous refrigerant enters the compressor 1, so as to prevent the liquid refrigerant from entering the compressor 1 and causing damage or performance degradation. Through the gas-liquid separator 2, the liquid refrigerant can be recycled, and only clean gaseous refrigerant enters the compressor 1, ensuring the normal operation and efficiency of the system.

[0044] The battery pack heat exchanger 3 has a third inlet and a third outlet. The third inlet is connected to the first outlet through the second pipeline, and the third outlet is connected to the third pipeline. The battery pack heat exchanger 3 receives the high-temperature and high-pressure gas refrigerant output by the compressor 1 through the second pipeline to heat the battery pack.

[0045] The battery pack heat exchanger 3 is arranged beside the battery pack, for example, it can be installed around or below the battery pack, which is not limited here. The battery pack heat exchanger 3 can help control the temperature of the battery pack, ensure that it works within a suitable temperature range, avoid problems caused by overheating or overcooling, and can also help dissipate heat to avoid overheating of the battery and improve the safety of the battery. When charging quickly, the battery pack will generate heat, and the battery pack heat exchanger 3 can help effectively dissipate heat to ensure that the charging process is stable and avoid affecting the charging speed due to overheating.

[0046] The waste heat recovery plate 4 has a fourth inlet, a fourth outlet, a fifth inlet and a fifth outlet. The fourth inlet is connected to a fourth pipeline, the fourth pipeline is connected to the third pipeline, and the fourth outlet is connected to the second inlet through the fifth pipeline.

[0047] The waste heat recovery plate 4 is a device for recovering waste heat generated in the motor electronically controlled heat recovery device 5 or the system. In the waste heat recovery plate 4, the refrigerant receives heat from the motor electronically controlled heat recovery device 5. During this process, the refrigerant changes from liquid to gas or a gas-liquid mixed state. The fourth outlet of the waste heat recovery plate 4 delivers the gas-liquid mixed refrigerant to the gas-liquid separator 2 through the fifth pipeline.

[0048] The motor electronically controlled heat recovery device 5 has a sixth inlet and a sixth outlet. The sixth inlet is connected to the fifth outlet, and the sixth outlet is connected to the fifth inlet.

[0049] The motor electronic control heat recovery device 5 is used to recover the heat generated by the motor and the electrical control device, and transport the heat to the waste heat recovery plate 4 through the sixth outlet.

[0050] The off-vehicle heat exchanger 6 has a seventh inlet and a seventh outlet. The seventh inlet is connected to a sixth pipeline, which is connected to the second pipeline. The seventh outlet is connected to a seventh pipeline, which is also connected to the third pipeline. The off-vehicle heat exchanger 6 inputs high-temperature and high-pressure gas delivered by the compressor 1 through the sixth pipeline to defrost the off-vehicle heat exchanger 6.

[0051] The vehicle exterior heat exchanger 6 is a device for heat exchange in the vehicle, and is usually installed outside the vehicle. The vehicle exterior heat exchanger 6 adjusts the temperature inside and outside the vehicle by heat transfer, and can be used to cool or heat the air or liquid inside the vehicle to maintain a comfortable driving environment or meet specific operating requirements.

[0052] Further, such as Figure 1 The illustrated defrosting system for the exterior heat exchanger further includes a first solenoid valve 8 , a second solenoid valve 9 , a first expansion valve 10 , a second expansion valve 11 , a third expansion valve 12 and a fourth expansion valve 13 .

[0053] The first solenoid valve 8 is located on the second pipeline and is used to control whether the refrigerant in the second pipeline flows. When the first solenoid valve 8 is in an open state, the refrigerant in the second pipeline flows; when the first solenoid valve 8 is in a closed state, the refrigerant in the second pipeline is in a stagnant state.

[0054] The second solenoid valve 9 is located on the sixth pipeline and is used to control whether the refrigerant in the sixth pipeline flows. When the second solenoid valve 9 is in an open state, the refrigerant in the sixth pipeline flows; when the second solenoid valve 9 is in a closed state, the refrigerant in the sixth pipeline is stagnant.

[0055] The first expansion valve 10 is located on the second pipeline and is used to control the flow rate of the refrigerant in the second pipeline. When the first expansion valve 10 increases its opening, the flow rate and pressure of the refrigerant in the second pipeline increase; when the first expansion valve 10 decreases its opening, the flow rate and pressure of the refrigerant in the second pipeline decrease. The first expansion valve 10 is connected to the third inlet of the battery pack heat exchanger 3.

[0056] The second expansion valve 11 is located on the third pipeline and is used to control the flow rate of the refrigerant in the third pipeline. When the second expansion valve 11 increases its opening, the flow rate and pressure of the refrigerant in the third pipeline increase; when the second expansion valve 11 decreases its opening, the flow rate and pressure of the refrigerant in the third pipeline decrease. The second expansion valve 11 is connected to the third outlet of the battery pack heat exchanger 3.

[0057] The third expansion valve 12 is located on the fourth pipeline and is used to control the flow rate of the refrigerant in the fourth pipeline. When the third expansion valve 12 increases its opening, the flow rate and pressure of the refrigerant in the fourth pipeline increase; when the third expansion valve 12 decreases its opening, the flow rate and pressure of the refrigerant in the fourth pipeline decrease. The third expansion valve 12 is connected to the fourth inlet of the waste heat recovery plate 4.

[0058] The fourth expansion valve 13 is located on the seventh pipeline and is used to control the flow rate of the refrigerant in the seventh pipeline. When the fourth expansion valve 13 increases its opening, the flow rate and pressure of the refrigerant in the seventh pipeline increase; when the fourth expansion valve 13 decreases its opening, the flow rate and pressure of the refrigerant in the seventh pipeline decrease. The fourth expansion valve 13 is connected to the seventh outlet of the off-board heat exchanger 6.

[0059] Among them, the first solenoid valve 8, the second solenoid valve 9, the first expansion valve 10, the second expansion valve 11, the third expansion valve 12 and the fourth expansion valve 13 have corresponding controllers, which are used to control the first solenoid valve 8 and the second solenoid valve 9 to be in an open state or a closed state; and to control the first expansion valve 10, the second expansion valve 11, the third expansion valve 12 and the fourth expansion valve 13 to increase or decrease the opening degree.

[0060] When the defrost condition is the first defrost condition and the current outlet water temperature of the motor-controlled heat recovery device 5 is greater than the first temperature threshold, the first solenoid valve 8 located on the second pipeline is in an open state, and the first expansion valve 10 located on the second pipeline is in a reduced opening state; the second expansion valve 11 located on the third pipeline is in an increased opening state; the third expansion valve 12 located on the fourth pipeline is in a reduced opening state; the second solenoid valve 9 located on the sixth pipeline is in an open state; the fourth expansion valve 13 located on the seventh pipeline is in an increased opening state; the water pump 21 included in the motor-controlled heat recovery device 5 is in an open state.

[0061] The first defrosting condition is a condition where the battery pack needs to be heated and the external heat exchanger 6 needs to be defrosted. Whether the battery pack needs to be heated is determined based on the battery temperature. If the battery temperature is less than a preset temperature threshold, it is determined that the battery pack needs to be heated.

[0062] The first temperature threshold refers to a preset temperature value. When the defrost condition is the first defrost condition and the current outlet water temperature of the motor-controlled heat recovery device 5 is greater than the first temperature threshold, the defrost system of the off-vehicle heat exchanger enters a specific working state, that is, the first solenoid valve 8 is in an open state, allowing fluid to pass through. The first expansion valve 10 is in a reduced opening state to limit the fluid flow rate to control the system pressure. The second expansion valve 11 is in an increased opening state to increase the fluid flow rate and promote heat transfer. The third expansion valve 12 is in a reduced opening state to limit the fluid flow rate and control the system pressure. The second solenoid valve 9 is in an open state to allow fluid flow. The fourth expansion valve 13 is in an increased opening state to enhance heat flow. The water pump 21 is in an open state to ensure the circulation of the fluid and the effective transfer of heat, so as to achieve defrosting of the off-vehicle heat exchanger 6 while heating the battery pack.

[0063] The off-vehicle heat exchanger defrost system provided by the embodiment of the present invention can effectively utilize the waste heat of the motor-controlled heat recovery device to ensure rapid defrosting under the first defrost condition through optimized piping and component configuration. Based on the outlet water temperature and the set temperature threshold, the system can flexibly adjust the operating state to improve energy efficiency and defrosting effect. Through reasonable pipeline connections, multiple components work together to ensure efficient flow and heat exchange of refrigerant. The state settings of the solenoid valve and expansion valve in the system can be automatically adjusted according to the real-time operating conditions, which enhances the response speed and adaptability of the system. The multiple valves and sensors included can monitor and adjust the fluid state to enhance the safety and stability of operation. Through the design of waste heat recovery, the existing heat is utilized to the maximum extent, energy consumption is reduced, and overall energy efficiency is improved.

[0064] In this embodiment, a defrosting system for an off-vehicle heat exchanger is provided. When the defrosting condition is the second defrosting condition and the current outlet water temperature is greater than the first temperature threshold, Figure 2 As shown, the outdoor heat exchanger defrosting system includes: a compressor 1, a gas-liquid separator 2, a battery pack heat exchanger 3, a waste heat recovery plate 4, a motor electronically controlled heat recovery device 5, an outdoor heat exchanger 6 and an indoor heat exchanger 7.

[0065] Among them, the compressor 1, gas-liquid separator 2, battery pack heat exchanger 3, waste heat recovery plate 4, motor electronic control heat recovery device 5 and vehicle external heat exchanger 6, please refer to Figure 1 The illustrated embodiments will not be described in detail here.

[0066] The in-car heat exchanger 7 is used to provide a heating function inside the car. By absorbing heat, the heat released by the refrigerant is transferred to the air in the car, thereby increasing the temperature inside the car and providing a comfortable driving environment for passengers.

[0067] The in-vehicle heat exchanger 7 has an eighth inlet and an eighth outlet, and the eighth inlet is connected to an eighth pipeline, which is also connected to the second pipeline. The eighth inlet of the in-vehicle heat exchanger 7 receives the high-temperature and high-pressure gaseous refrigerant delivered by the compressor 1 through the eighth pipeline. In the in-vehicle heat exchanger 7, by exchanging heat with the outside air or the engine coolant, the refrigerant releases heat and gradually becomes a low-temperature and low-pressure gas, and at the same time transfers heat to the air in the vehicle compartment, thereby achieving the effect of heating the vehicle compartment.

[0068] The eighth outlet of the in-vehicle heat exchanger 7 is connected to a ninth pipeline, which is also connected to the third pipeline, and the low-temperature and low-pressure gas after releasing heat is transported through the third pipeline.

[0069] Further, such as Figure 2 The illustrated defrosting system for the external heat exchanger further includes a first solenoid valve 8 , a second solenoid valve 9 , a first expansion valve 10 , a second expansion valve 11 , a third expansion valve 12 , a fourth expansion valve 13 , a third solenoid valve 14 and a fourth solenoid valve 15 .

[0070] Among them, the first solenoid valve 8, the second solenoid valve 9, the first expansion valve 10, the second expansion valve 11, the third expansion valve 12, and the fourth expansion valve 13, for details, see Figure 1 The illustrated embodiments will not be described in detail here.

[0071] The third solenoid valve 14 is located on the eighth pipeline and is used to control whether the refrigerant in the eighth pipeline flows. When the third solenoid valve 14 is in an open state, the refrigerant in the eighth pipeline flows; when the third solenoid valve 14 is in a closed state, the refrigerant in the eighth pipeline is stagnant.

[0072] The fourth solenoid valve 15 is located on the ninth pipeline and is used to control whether the refrigerant in the ninth pipeline flows. When the fourth solenoid valve 15 is in an open state, the refrigerant in the ninth pipeline flows; when the fourth solenoid valve 15 is in a closed state, the refrigerant in the ninth pipeline is stagnant.

[0073] The third solenoid valve 14 and the fourth solenoid valve 15 have corresponding controllers, and the controllers are used to control the third solenoid valve 14 and the fourth solenoid valve 15 to be in an open state or a closed state.

[0074] When the defrost condition is the second defrost condition and the current outlet water temperature of the motor-controlled heat recovery device 5 is greater than the first temperature threshold, the third solenoid valve 14 on the eighth pipeline and the fourth solenoid valve 15 on the ninth pipeline are in the open state.

[0075] The second defrost condition is a condition in which the cabin needs to be heated, the battery pack needs to be heated, and the external heat exchanger 6 needs to be defrosted. Among them, whether the cabin needs to be heated is determined by the heating command input by the user to the vehicle, for example, the user presses the button of the vehicle air conditioner to blow warm air. Specifically, when the defrost condition is the second defrost condition and the current outlet water temperature of the motor-controlled heat recovery device 5 is greater than the first temperature threshold, the third solenoid valve 14 and the fourth solenoid valve 15 are both in the open state, indicating that they are allowing the refrigerant to flow through the corresponding eighth and ninth pipelines to achieve effective heat transfer, thereby achieving heating of the cabin and the battery pack while defrosting the external heat exchanger 6.

[0076] The external heat exchanger defrost system provided by the embodiment of the present invention not only supports external defrosting, but also can provide heat inside the vehicle, which helps to realize an integrated temperature control system and improve the overall performance of the vehicle. Through the in-vehicle heat exchanger, heat can be effectively transferred to the interior of the vehicle to enhance the comfort of passengers. By recovering and reusing waste heat, the system can effectively improve the utilization efficiency of heat, reduce energy consumption, and optimize energy efficiency. The integration of the in-vehicle heat exchanger enables the system to flexibly adjust the temperature inside the vehicle according to different working conditions to meet different needs.

[0077] In this embodiment, a defrosting system for an off-vehicle heat exchanger is provided. When the defrosting condition is the third defrosting condition, the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, as Figure 3 As shown, the defrosting system of the outdoor heat exchanger includes: a compressor 1, a gas-liquid separator 2, a battery pack heat exchanger 3, a waste heat recovery plate 4, a motor electronically controlled heat recovery device 5, an outdoor heat exchanger 6, an indoor heat exchanger 7 and a tenth pipeline.

[0078] Among them, the compressor 1, the gas-liquid separator 2, the battery pack heat exchanger 3, the waste heat recovery plate 4, the motor electronic control heat recovery device 5, the vehicle exterior heat exchanger 6 and the vehicle interior heat exchanger 7, please refer to Figure 2 The illustrated embodiments will not be described in detail here.

[0079] A tenth pipeline, one end of the tenth pipeline is connected to the fifth pipeline and the other end of the tenth pipeline is connected to the second pipeline.

[0080] The liquid refrigerant output by the off-board heat exchanger 6 passes through the seventh pipeline and the third pipeline in sequence, and is then input into the battery pack heat exchanger 3. The battery pack heat exchanger 3 is used as an evaporator to absorb the heat generated by the battery. When the refrigerant evaporates in the battery pack heat exchanger 3, it absorbs the heat of the battery and converts the refrigerant from liquid to gas. The battery pack heat exchanger 3 inputs the converted gaseous refrigerant into the gas-liquid separator 2 through the tenth pipeline.

[0081] The gas-liquid separator 2 separates the gaseous refrigerant transported by the battery pack heat exchanger 3 through the tenth pipeline and the gaseous refrigerant transported by the waste heat recovery plate 4 through the fifth pipeline into gas and liquid, ensuring that only the gaseous refrigerant enters the compressor 1 .

[0082] The compressor 1 compresses the gaseous refrigerant into high-temperature and high-pressure gas, and delivers the gas to the in-vehicle heat exchanger 7 for heating the vehicle compartment and to the out-vehicle heat exchanger 6 for defrosting the out-vehicle heat exchanger 6.

[0083] Further, such as Figure 3 The illustrated defrosting system for the exterior heat exchanger further includes a second solenoid valve 9 , a first expansion valve 10 , a second expansion valve 11 , a third expansion valve 12 , a fourth expansion valve 13 , a third solenoid valve 14 , a fourth solenoid valve 15 and a fifth solenoid valve 16 .

[0084] Among them, the second solenoid valve 9, the first expansion valve 10, the second expansion valve 11, the third expansion valve 12, the fourth expansion valve 13, the third solenoid valve 14 and the fourth solenoid valve 15, for details, see Figure 2 The illustrated embodiments will not be described in detail here.

[0085] The fifth solenoid valve 16 is located on the tenth pipeline and is used to control whether the refrigerant in the tenth pipeline flows. When the fifth solenoid valve 16 is in an open state, the refrigerant in the tenth pipeline flows; when the fifth solenoid valve 16 is in a closed state, the refrigerant in the tenth pipeline is stagnant.

[0086] The fifth solenoid valve 16 has a corresponding controller, and the controller is used to control the fifth solenoid valve 16 to be in an open state or a closed state.

[0087] When the defrost condition is the third defrost condition, the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, the fifth solenoid valve 16 on the tenth pipeline is in an open state, the first solenoid valve 8 on the second pipeline is in a closed state, the first expansion valve 10 is in a reduced opening state, and the fourth expansion valve 13 is in an increased opening state.

[0088] The third defrost condition is a condition in which the vehicle compartment needs to be heated and the external heat exchanger 6 needs to be defrosted. The second temperature threshold is a specific temperature set point, which is used to determine whether the battery temperature of the battery pack meets the operating conditions of the system under the third defrost condition. Specifically, the fifth solenoid valve 16 is in an open state, allowing the refrigerant to flow in the tenth pipeline. The first solenoid valve 8 is in a closed state, that is, the high-temperature and high-pressure gaseous refrigerant output by the compressor 1 is no longer input into the battery pack heat exchanger 3, and the battery pack is not heated. The first expansion valve 10 reduces the flow rate of the refrigerant by reducing the opening, and the fourth expansion valve 13 allows more refrigerant to flow in by increasing the opening, thereby improving the heat exchange capacity of the system, achieving defrosting of the external heat exchanger 6 while heating the vehicle compartment.

[0089] The off-vehicle heat exchanger defrost system provided by the embodiment of the present invention can effectively utilize heat, optimize the temperature management of the battery, and improve its performance and life when the battery temperature of the battery pack is higher than the second temperature threshold. By dynamically adjusting the state of the solenoid valve and the expansion valve under different working conditions, the system can flexibly adapt to temperature changes according to real-time conditions to ensure optimal working conditions. The introduction of the tenth pipeline can more effectively utilize the refrigerant cycle, reduce energy consumption, improve overall energy efficiency, and reduce dependence on external energy sources. By reasonably setting the working states of the solenoid valve and the expansion valve, the system can simplify the control strategy, improve the response speed, and enhance the real-time adjustment capability of the system. Dynamic adjustment of the valve state can reduce the instability of fluid flow, thereby improving the stability and reliability of the entire system.

[0090] In this embodiment, a motor electronically controlled heat recovery device 5 is provided, such as Figure 4 As shown, the motor electronically controlled heat recovery device 5 includes a motor radiator 17 , an electronically controlled radiator 18 , an engine radiator 19 , a first three-way valve 20 , a water pump 21 and a second three-way valve 22 .

[0091] The motor electronically controlled heat recovery device 5 has a sixth inlet 401 and a sixth outlet 402 .

[0092] The motor radiator 17 is used to dissipate heat from the motor. The motor radiator 17 is disposed beside the motor, where the side may be around or below the motor, which is not limited here.

[0093] The electric control radiator 18 cools the heat generated by the electric control device (such as an electric controller, a frequency converter, etc.). The electric control radiator 18 is arranged beside the electric control device, where the side can be around or below the motor, which is not limited here. The motor radiator 17 and the electric control radiator 18 are connected in parallel and have a first port and a second port.

[0094] The engine radiator 19 is used to cool the heat generated by the internal combustion engine. The engine radiator 19 has a third port and a fourth port. The third port of the engine radiator 19 is connected to the first port through a pipeline.

[0095] The first three-way valve 20 is used to control the flow direction and flow rate of the cooling medium (such as water or coolant) in the system to adjust the cooling effect of different components (such as the engine, the electronically controlled radiator, etc.). The first three-way valve 20 has a first valve, a second valve and a third valve. The first valve of the first three-way valve 20 is connected to the fourth port through a pipeline, and the second valve is connected to the first port through a pipeline.

[0096] The water pump 21 is used to extract or push the cooling medium from one place to another. The water pump 21 has a fifth port and a sixth port, and the fifth port of the water pump 21 is connected to the third valve of the first three-way valve 20 through a pipeline.

[0097] Specifically, the water pump 21 delivers the cooling medium to the third valve of the first three-way valve 20 through the fifth port, and the third valve delivers the cooling medium to the engine radiator 19 to cool the engine. The second valve of the first three-way valve 20 delivers the cooling medium to the motor radiator 17 and the electric control radiator 18 to cool the motor and the electric control device.

[0098] The second three-way valve 22 has a fourth valve, a fifth valve and a sixth valve. The fourth valve of the second three-way valve 22 is connected to the sixth port through a pipeline, the fifth valve is connected to the second port through a pipeline, and the sixth valve is connected to the fifth inlet through a pipeline. Specifically, the cooling medium carrying heat of the generator, the motor and the electrical control device is input into the second three-way valve 22 through the second port, and the sixth valve of the second three-way valve 22 transports the cooling medium carrying heat to the waste heat recovery plate 4.

[0099] The heat of the motor and the electrical control device rises slowly, so there is no need to dissipate heat for the motor and the electrical control device at the beginning of the system operation, and the second port of the second three-way valve 22 is controlled to be closed.

[0100] The off-vehicle heat exchanger defrosting system provided by the embodiment of the present invention can more effectively recover the heat generated by the motor and the electronic control device by connecting the motor radiator and the electronic control radiator in parallel, thereby improving the overall heat recovery efficiency. The flow path of the cooling medium can be flexibly adjusted according to the working state, thereby optimizing the cooling effect of the motor and the electronic control device to prevent overheating. Utilizing the first and second three-way valves, the system can dynamically adjust the heat distribution according to the real-time temperature and working state, and improve the adaptability to different working conditions. By effectively recovering and utilizing heat, the system can reduce dependence on external cooling or heating sources, thereby reducing energy consumption and improving energy efficiency.

[0101] According to an embodiment of the present invention, an embodiment of a method for defrosting an off-vehicle heat exchanger is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0102] In this embodiment, a method for defrosting an off-vehicle heat exchanger is provided, which is applied to Figure 1 The outside heat exchanger defrost system shown, Figure 5 is a flow chart of a method for defrosting an external heat exchanger according to an embodiment of the present invention. Figure 5 As shown, the process includes the following steps:

[0103] Step S101, recovering heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate.

[0104] The generator, motor and electrical control device will generate heat when working. The water pump 21 in the motor electronic control heat recovery device 5 controls the cooling medium to pass through the engine radiator 19, the motor radiator 17 and the electronic control radiator 18 in sequence, absorbs the heat generated by the generator, motor and electrical control device when working, and inputs the cooling medium carrying heat into the waste heat recovery plate 4. The liquid refrigerant in the waste heat recovery plate 4 recovers the heat generated by the motor electronic control heat recovery device and is converted into gaseous refrigerant due to the heat.

[0105] In step S102, the refrigerant with recovered heat passes through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence to heat the battery pack, and passes through the gas-liquid separator, the compressor and the external heat exchanger in sequence to defrost the external heat exchanger.

[0106] The gaseous refrigerant with recovered heat is transported to the gas-liquid separator 2 through the fifth pipeline. The gas-liquid separator 2 separates the liquid refrigerant that may be included in the gaseous refrigerant, and transports the separated gaseous refrigerant to the compressor 1 through the first pipeline. The compressor 1 compresses the separated gaseous refrigerant and transports the compressed high-temperature and high-pressure gas to the battery pack heat exchanger 3 through the second pipeline to heat the battery pack; at the same time, the compressed high-temperature and high-pressure gas is transported to the external heat exchanger 6 through the sixth pipeline to defrost it.

[0107] The defrosting method for an off-vehicle heat exchanger provided in an embodiment of the present invention utilizes the refrigerant in the waste heat recovery plate to recover heat, thereby heating the battery pack and defrosting the off-vehicle heat exchanger, thereby improving energy utilization efficiency by recovering the waste heat generated by the motor and the electronic control to heat the battery pack and defrost the off-vehicle heat exchanger. By heating the battery pack and keeping the battery operating within the optimal operating temperature range, the performance of the battery can be improved and its life can be extended. Through effective defrosting of the off-vehicle heat exchanger, the normal operation of the off-vehicle heat exchanger in a cold environment is ensured, the decrease in heat exchange efficiency due to frost accumulation is avoided, and the operating safety of the vehicle is enhanced.

[0108] In this embodiment, a method for defrosting an off-vehicle heat exchanger is provided, which is applied to Figure 1 The outside heat exchanger defrost system shown, Figure 6 is a flow chart of a method for defrosting an external heat exchanger according to an embodiment of the present invention. Figure 6 As shown, the process includes the following steps:

[0109] Step S201, controlling the first solenoid valve located in the second pipeline, the second solenoid valve located in the sixth pipeline, and the water pump included in the motor-controlled heat recovery device to start.

[0110] Determine whether the external heat exchanger 6 needs to be defrosted, where the defrosting determination method may include the compressor suction and exhaust pressure ratio method, the timed defrosting method, the temperature difference control method, etc., which are not limited here. If it is determined that the external heat exchanger 6 needs to be defrosted, confirm whether the coolant outlet water temperature of the motor electronically controlled heat recovery device 5 is greater than the first temperature threshold, that is, the first temperature threshold is the lower limit temperature for waste heat recovery. When the motor electronically controlled coolant outlet water temperature is greater than the first temperature threshold, open the first solenoid valve 8, the second solenoid valve 9 and the water pump 21.

[0111] If it is determined that the outdoor heat exchanger 6 does not need to be defrosted, the outdoor heat exchanger defrosting system maintains the current state and continues to operate.

[0112] Step S202, controlling the second expansion valve located in the third pipeline and the fourth expansion valve located in the seventh pipeline to increase their opening degrees.

[0113] The second expansion valve 11 and the fourth expansion valve 13 are controlled to be in a fully open mode, wherein the fully open mode is that the second expansion valve 11 and the fourth expansion valve 13 use large-diameter electronic expansion valves and are fully open without throttling.

[0114] Step S203, controlling the first expansion valve located in the second pipeline and the third expansion valve located in the fourth pipeline to reduce their opening degrees.

[0115] The first expansion valve 10 is controlled to reduce its opening degree so that the third inlet refrigerant of the battery pack heat exchanger 3 is superheated, wherein the third inlet refrigerant superheat is to ensure that pure gas refrigerant enters the compressor 1 to avoid liquid hammer in the compressor 1.

[0116] The third expansion valve 12 is controlled to reduce its opening degree so that the fourth outlet refrigerant of the waste heat recovery plate 4 is superheated, wherein the fourth outlet refrigerant superheat is to ensure that pure gas refrigerant enters the gas-liquid separator 2. In general, the superheat is about 5-8°C.

[0117] Furthermore, waste heat from the motor and the electrical control device is used as a heat source for the waste heat recovery plate 4, the waste heat recovery plate 4 serves as an evaporator in the system, and the external heat exchanger 6 and the battery pack heat exchanger 3 are condensers in the system, which are used for defrosting the external heat exchanger 6 and heating the battery pack, respectively.

[0118] When the outlet water temperature of the motor electronic control coolant is lower than the first temperature threshold, the motor and the electrical control device are switched to the low-efficiency mode, and the heat generated by the motor and the electrical control device is used as the heat source of the waste heat recovery plate 4 to defrost the off-board heat exchanger 6, while ensuring that the battery temperature rise meets the requirements.

[0119] Step S204, recover the heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate. Figure 5 Step S101 of the illustrated embodiment will not be described in detail here.

[0120] Step S205: The refrigerant with recovered heat passes through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence to heat the battery pack, and passes through the gas-liquid separator, the compressor and the vehicle exterior heat exchanger in sequence to defrost the vehicle exterior heat exchanger. Figure 5 Step S102 of the illustrated embodiment will not be described in detail here.

[0121] In the defrosting method for an off-vehicle heat exchanger provided by an embodiment of the present invention, adjusting the opening of the expansion valve can effectively control the flow of the refrigerant, thereby optimizing the energy efficiency of the system and reducing unnecessary energy loss. Turning on the water pump and appropriately increasing the opening of the expansion valve can help to quickly improve the heat transfer efficiency, speed up the defrosting process, and improve driving safety. Through the flexible control of the solenoid valve and the expansion valve, the system can quickly respond to environmental changes, achieve rapid adjustment, and improve overall performance.

[0122] In this embodiment, a method for defrosting an off-vehicle heat exchanger is provided, which is applied to Figure 2 The outside heat exchanger defrost system shown, Figure 7 is a flow chart of a method for defrosting an external heat exchanger according to an embodiment of the present invention. Figure 7 As shown, the process includes the following steps:

[0123] Step S301, control the first solenoid valve located in the second pipeline, the second solenoid valve located in the sixth pipeline, and the water pump included in the motor-controlled heat recovery device to start. Figure 6 Step S201 of the illustrated embodiment will not be described in detail here.

[0124] Step S302, controlling the third solenoid valve located in the eighth pipeline and the fourth solenoid valve located in the ninth pipeline to open.

[0125] It is determined whether the external heat exchanger 6 needs to be defrosted according to a preset defrosting judgment method, whether the battery pack needs to be heated according to the battery temperature, and whether the vehicle compartment needs to be heated according to a heating instruction input by the user to the vehicle. When it is determined that the external heat exchanger 6 needs to be defrosted, the battery pack needs to be heated, and the vehicle compartment needs to be heated, when the water temperature at the outlet of the motor electronically controlled coolant is greater than the first temperature threshold, the third solenoid valve 14 and the fourth solenoid valve 15 are opened.

[0126] Step S303, control the second expansion valve located in the third pipeline and the fourth expansion valve located in the seventh pipeline to increase their opening degrees. Figure 6 Step S202 of the illustrated embodiment will not be described in detail here.

[0127] Step S304, control the first expansion valve located in the second pipeline and the third expansion valve located in the fourth pipeline to reduce their opening degrees. Figure 6 Step S203 of the illustrated embodiment will not be described in detail here.

[0128] Step S305, recover the heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate. Figure 6 Step S204 of the illustrated embodiment will not be described in detail here.

[0129] Step S306: The refrigerant with recovered heat passes through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence to heat the battery pack, and passes through the gas-liquid separator, the compressor and the vehicle exterior heat exchanger in sequence to defrost the vehicle exterior heat exchanger. Figure 6 Step S205 of the illustrated embodiment will not be described in detail here.

[0130] The defrosting method for an off-vehicle heat exchanger provided by an embodiment of the present invention can increase the flow of heat, quickly remove the frost layer on the off-vehicle heat exchanger, and shorten the defrosting time by controlling the opening of the solenoid valve under the second defrosting condition. The heat of the on-vehicle heat exchanger can be flexibly distributed to ensure the thermal management effect inside and outside the vehicle. By accurately controlling the operating state of the system, unnecessary energy consumption can be reduced and the overall energy efficiency can be improved. It can quickly respond to temperature changes, adjust the heat flow by adjusting the opening state of the solenoid valve, and improve the dynamic adjustment ability of the system.

[0131] In this embodiment, a method for defrosting an off-vehicle heat exchanger is provided, which is applied to Figure 3 The outside heat exchanger defrost system shown, Figure 8 is a flow chart of a method for defrosting an external heat exchanger according to an embodiment of the present invention. Figure 8 As shown, the process includes the following steps:

[0132] Step S401, control the second solenoid valve in the sixth pipeline and the water pump included in the motor-controlled heat recovery device to start. Figure 7 Step S301 of the illustrated embodiment will not be described in detail here.

[0133] Step S402, controlling the fifth solenoid valve located in the tenth pipeline to open.

[0134] It is determined whether the external heat exchanger 6 needs to be defrosted according to a preset defrosting judgment method, and it is determined whether the vehicle compartment needs to be heated according to a heating instruction input by the user to the vehicle. When it is determined that the external heat exchanger 6 needs to be defrosted and the vehicle compartment needs to be heated, when the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, the fifth solenoid valve 16 is opened.

[0135] Step S403, controlling the first expansion valve to increase its opening degree and controlling the second expansion valve to decrease its opening degree, and opening the third expansion valve and the fourth expansion valve.

[0136] The first expansion valve 10 is controlled to be in full-open mode, and the second expansion valve 11 is controlled to reduce the opening degree, so that the refrigerant at the heat dissipation outlet of the battery pack heat exchanger 3 is superheated, wherein the heat dissipation outlet of the battery pack heat exchanger 3 is the third inlet of the battery pack heat exchanger 3. At this time, the battery pack heat exchanger 3 is used as an evaporator, absorbing the heat of the battery to defrost the external heat exchanger 6, and at the same time, the internal heat exchanger 7 is in the open state to ensure that the temperature inside the vehicle does not drop.

[0137] If the battery temperature of the battery pack is lower than the second temperature threshold, the first expansion valve 10 and the second expansion valve 11 are kept in a closed state, and the fifth solenoid valve 16 is kept in a closed state.

[0138] When the outlet water temperature of the motor electronically controlled coolant is greater than the first temperature threshold, the third expansion valve 12 and the fourth expansion valve 13 are opened, the water pump 21 is turned on, and the waste heat of the motor and the electrical control device is used as the heat source of the waste heat recovery plate 4 to defrost the outdoor heat exchanger 6 while ensuring that the indoor temperature does not drop.

[0139] When the outlet water temperature of the motor electronic control coolant is lower than the first temperature threshold, the motor and the electrical control device are switched to the low-efficiency mode, and the heat generated by the motor and the electrical control device is used as the heat source of the waste heat recovery plate 4 to defrost the outdoor heat exchanger 6 while ensuring that the indoor temperature does not drop.

[0140] Step S404, recover the heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate. Figure 7 Step S101 of the illustrated embodiment will not be described in detail here.

[0141] Step S405: The refrigerant with recovered heat passes through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence to heat the battery pack, and passes through the gas-liquid separator, the compressor and the vehicle exterior heat exchanger in sequence to defrost the vehicle exterior heat exchanger. Figure 7 Step S102 of the illustrated embodiment will not be described in detail here.

[0142] The defrosting method for an off-vehicle heat exchanger provided in an embodiment of the present invention responds to the third defrosting condition by introducing the tenth pipeline and the fifth solenoid valve, as well as the precise control of the solenoid valve and the expansion valve, thereby monitoring the battery temperature and adjusting the flow direction and flow rate of the cooling medium in a timely manner. This method helps to prevent the battery pack from overheating or being affected by inappropriate temperatures, thereby protecting the battery pack and extending its service life. At the same time, the precise control of the operation of each solenoid valve and the expansion valve makes the defrosting process more efficient, ensures that the off-vehicle heat exchanger maintains good working performance in a cold environment, and improves driving safety.

[0143] In this embodiment, a defrosting device for an off-board heat exchanger is also provided, which is used to implement the above-mentioned embodiments and preferred implementations, and will not be repeated hereafter. As used below, the term "module" may be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0144] This embodiment provides a defrosting device for an external heat exchanger, such as Fig. 9 As shown, including:

[0145] The recovery module 501 is used to recover the heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate.

[0146] The temperature regulating module 502 is used to recover the refrigerant with heat to heat the battery pack through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence, and to defrost the external heat exchanger through the gas-liquid separator, the compressor and the external heat exchanger in sequence.

[0147] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0148] The outdoor heat exchanger defrost device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0149] The defrosting device for the off-vehicle heat exchanger provided in the embodiment of the present invention recovers heat by utilizing the refrigerant in the waste heat recovery plate, thereby heating the battery pack and defrosting the off-vehicle heat exchanger, thereby improving the efficiency of energy utilization by recovering the waste heat generated by the motor and the electronic control to heat the battery pack and defrost the off-vehicle heat exchanger. By heating the battery pack and keeping the battery operating within the optimal operating temperature range, the performance of the battery can be improved and its life can be extended. Through effective defrosting of the off-vehicle heat exchanger, the normal operation of the off-vehicle heat exchanger in a cold environment is ensured, the decrease in heat exchange efficiency due to frost accumulation is avoided, and the operating safety of the vehicle is enhanced.

[0150] The embodiment of the present invention also provides a computer device having the above Fig.10 The defrost device for the outdoor heat exchanger is shown.

[0151] See also Fig.10 , Fig.10 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig.10 As shown, the computer device includes: one or more processors 100, a memory 200, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.10 A processor 100 is taken as an example.

[0152] The processor 100 may be a central processing unit, a network processor or a combination thereof. The processor 100 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable logic gate array, a general purpose array logic or any combination thereof.

[0153] The memory 200 stores instructions executable by at least one processor 100, so that at least one processor 100 executes the method shown in the above embodiment.

[0154] The memory 200 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 200 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 200 may optionally include a memory remotely arranged relative to the processor 100, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0155] The memory 200 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 200 may also include a combination of the above types of memory.

[0156] The computer device also includes an input device 300 and an output device 400. The processor 100, the memory 200, the input device 300 and the output device 400 may be connected via a bus or other means. Fig.10 The example of connecting through bus is taken in the following.

[0157] The input device 300 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 400 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0158] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0159] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0160] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0161] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0162] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0163] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A defrosting system for an off-vehicle heat exchanger, characterized in that: When the defrost condition is the first defrost condition and the current outlet water temperature of the motor electronically controlled heat recovery device is greater than a first temperature threshold, the system includes: a compressor having a first inlet and a first outlet; A gas-liquid separator having a second inlet and a second outlet, wherein the second outlet is connected to the first inlet through a first pipeline; A battery pack heat exchanger is arranged beside the battery pack; The battery pack heat exchanger has a third inlet and a third outlet; The third inlet is connected to the first outlet via a second pipeline, and the third outlet is connected to a third pipeline; The waste heat recovery plate has a fourth inlet, a fourth outlet, a fifth inlet and a fifth outlet, the fourth inlet is connected to a fourth pipeline, the fourth pipeline is connected to the third pipeline; the fourth outlet is connected to the second inlet through the fifth pipeline; The motor electronically controlled heat recovery device has a sixth inlet and a sixth outlet, wherein the sixth inlet is connected to the fifth outlet, and the sixth outlet is connected to the fifth inlet; an off-vehicle heat exchanger having a seventh inlet and a seventh outlet, the seventh inlet being connected to a sixth pipeline, and the sixth pipeline being connected to the second pipeline; The seventh outlet is connected to a seventh pipeline, and the seventh pipeline is also connected to the third pipeline; Among them, refrigerant is provided in the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline and the sixth pipeline; the first solenoid valve located on the second pipeline is in an open state, and the first expansion valve located on the second pipeline is in a reduced opening state; the second expansion valve located on the third pipeline is in an increased opening state; the third expansion valve located on the fourth pipeline is in a reduced opening state; the second solenoid valve located on the sixth pipeline is in an open state; the fourth expansion valve located on the seventh pipeline is in an increased opening state; the water pump included in the motor-controlled heat recovery device is in an open state.

2. The system according to claim 1, characterized in that When the defrost operating condition is the second defrost operating condition and the current outlet water temperature is greater than the first temperature threshold, the system further includes: The in-vehicle heat exchanger has an eighth inlet and an eighth outlet, the eighth inlet is connected to an eighth pipeline, and the eighth pipeline is also connected to the second pipeline; the eighth outlet is connected to a ninth pipeline, and the ninth pipeline is also connected to the third pipeline; Wherein, refrigerant is also arranged in the eighth pipeline and the ninth pipeline; the third solenoid valve located on the eighth pipeline and the fourth solenoid valve located on the ninth pipeline are in an open state.

3. The system according to claim 2, characterized in that When the defrost operating condition is the third defrost operating condition, the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, the system further includes: a tenth pipeline, one end of the tenth pipeline being connected to the fifth pipeline and the other end of the tenth pipeline being connected to the second pipeline; Among them, refrigerant is also arranged in the tenth pipeline; the fifth solenoid valve located on the tenth pipeline is in an open state; the first solenoid valve changes from an open state to a closed state; the first expansion valve changes from a reduced opening state to an increased opening state; the second expansion valve changes from an increased opening state to a reduced opening state; the third expansion valve and the fourth expansion valve change to a normal state.

4. The system according to claim 1, characterized in that The motor electronically controlled heat recovery device also includes: The motor radiator is arranged beside the motor; An electric control radiator is arranged beside the electric control device; wherein the electric control radiator and the motor radiator are connected in parallel and have a first port and a second port; an engine radiator, having a third port and a fourth port, wherein the third port of the engine radiator is connected to the first port via a pipeline; a first three-way valve, comprising a first valve, a second valve and a third valve, wherein the first valve is connected to the fourth port via a pipeline, the second valve is connected to the first port via a pipeline, and the third valve is connected to the fifth port of the water pump via a pipeline; The second three-way valve has a fourth valve, a fifth valve and a sixth valve, wherein the fourth valve is connected to the sixth port of the water pump through a pipeline, the fifth valve is connected to the second port through a pipeline, and the sixth valve is connected to the fifth inlet through a pipeline.

5. A method for defrosting an off-vehicle heat exchanger, characterized in that: Applicable to the off-vehicle heat exchanger defrosting system of claim 1, when the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electronically controlled heat recovery device is greater than the first temperature threshold, the method comprises: The heat generated by the motor electronically controlled heat recovery device is recovered through the refrigerant in the waste heat recovery plate; The refrigerant with recovered heat passes through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence to heat the battery pack, and passes through the gas-liquid separator, the compressor and the external heat exchanger in sequence to defrost the external heat exchanger.

6. The method according to claim 5, characterized in that The method further comprises: Control the first solenoid valve located in the second pipeline, the second solenoid valve located in the sixth pipeline, and the water pump included in the motor-controlled heat recovery device to start; Controlling the second expansion valve located in the third pipeline and the fourth expansion valve located in the seventh pipeline to increase their openings; The first expansion valve located in the second pipeline and the third expansion valve located in the fourth pipeline are controlled to reduce their opening degrees.

7. The method according to claim 6, characterized in that The vehicle external heat exchanger defrosting system also includes an in-vehicle heat exchanger, a third solenoid valve and a fourth solenoid valve; the in-vehicle heat exchanger has an eighth inlet and an eighth outlet, the eighth inlet is connected to an eighth pipeline, and the eighth pipeline is connected to the second pipeline; the eighth outlet is connected to a ninth pipeline, and the ninth pipeline is connected to the third pipeline; when the defrosting condition is the second defrosting condition and the current outlet water temperature is greater than the first temperature threshold, the method further includes: The third solenoid valve located in the eighth pipeline and the fourth solenoid valve located in the ninth pipeline are controlled to open.

8. The method according to claim 7, characterized in that The vehicle external heat exchanger defrosting system also includes a tenth pipeline and a fifth solenoid valve; one end of the tenth pipeline is connected to the fifth pipeline and the other end is connected to the second pipeline; when the defrosting condition is the third defrosting condition, the battery temperature of the battery pack is greater than the second temperature threshold and the current outlet water temperature is greater than the first temperature threshold, the method further includes: Controlling the fifth solenoid valve located in the tenth pipeline to open, and controlling the first solenoid valve to close; The first expansion valve is controlled to change from a reduced opening state to an increased opening state, the second expansion valve is controlled to change from an increased opening state to a reduced opening state, and the third expansion valve and the fourth expansion valve are controlled to change to a normal state.

9. A defrosting device for an off-vehicle heat exchanger, characterized in that: The device comprises: A recovery module, used for recovering heat generated by the motor electronically controlled heat recovery device through the refrigerant in the waste heat recovery plate; The temperature regulation module is used to recover the refrigerant with heat to heat the battery pack through the gas-liquid separator, the compressor and the battery pack heat exchanger in sequence, and to defrost the external heat exchanger through the gas-liquid separator, the compressor and the external heat exchanger in sequence.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for defrosting an external vehicle heat exchanger according to any one of claims 5 to 8 by executing the computer instructions.

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