Vehicle external heat exchanger defrosting system, method, device and computer equipment

Abstract

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

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile thermal management, in particular to a vehicle external heat exchanger defrosting system, method, device and computer equipment. BACKGROUND

[0002] New energy vehicles have an important development trend in the development of the entire automobile industry. Since new energy vehicles use batteries as power sources, keeping the batteries within an appropriate temperature range is the key to ensuring the stable performance and safe reliability of new energy vehicles.

[0003] At present, a heat pump system, as a high-efficiency and energy-saving heating method, is widely used in battery heating and passenger cabin heating in new energy vehicles. However, when the heat pump system operates under low-temperature conditions in winter, the vehicle external heat exchanger, as an evaporator, will appear frost formation, especially in areas with high humidity, which greatly reduces the human comfort in the vehicle and also increases the energy consumption of the automobile heat pump system. SUMMARY

[0004] Therefore, the present application provides a vehicle external heat exchanger defrosting system, method, device and computer equipment to solve the problem of frost formation on the vehicle external heat exchanger.

[0005] In a first aspect, the present application provides a vehicle external heat exchanger defrosting system, when the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electric control heat recovery device is greater than the first temperature threshold, comprising: 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 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 through a second pipeline, and the third outlet is connected with a third pipeline; a waste heat recovery plate having a fourth inlet, a fourth outlet, a fifth inlet and a fifth outlet, the fourth inlet being connected with a fourth pipeline, the fourth pipeline being connected with the third pipeline; the fourth outlet is connected with the second inlet through a fifth pipeline; a motor electric control heat recovery device having a sixth inlet and a sixth outlet, the sixth inlet being connected with the fifth outlet, and the sixth outlet being connected with the fifth inlet; a vehicle external heat exchanger having a seventh inlet and a seventh outlet, the seventh inlet being connected with a sixth pipeline, and the sixth pipeline being connected with the second pipeline; the seventh outlet is connected with a seventh pipeline, and the seventh pipeline is also connected with 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 electromagnetic valve located on the second pipeline is in an open state, 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 electromagnetic 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 electric control heat recovery device is in an open state.

[0006] The vehicle external heat exchanger defrosting system provided by the embodiment of the present application can effectively utilize the waste heat of the motor electric control heat recovery device under the first defrosting condition through the optimized pipeline and component configuration, and ensure rapid defrosting. Based on the outlet water temperature and the set temperature threshold, the system can flexibly adjust the operating state to improve the energy efficiency and defrosting effect. Through reasonable pipeline connection, multiple components work cooperatively to ensure efficient flow and heat exchange of the refrigerant. The state settings of the electromagnetic valves and expansion valves in the system can be automatically adjusted according to the real-time working condition, thereby enhancing the response speed and adaptability of the system. The multiple valves and sensors included in the system can monitor and adjust the fluid state, thereby enhancing the safety and stability of the operation. Through the waste heat recovery design, the existing heat is maximally utilized, the energy consumption is reduced, and the overall energy efficiency is improved.

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

[0008] The outdoor heat exchanger defrosting system provided by the embodiments of the present application not only supports outdoor defrosting, but also can provide heat in the vehicle, which helps to realize an integrated temperature control system and improve the overall performance of the vehicle. Through the indoor heat exchanger, heat can be effectively transferred to the vehicle, enhancing 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 indoor heat exchanger enables the system to flexibly adjust the temperature in the vehicle according to different conditions, meeting different needs.

[0009] In an optional embodiment, 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 system further comprises: a tenth pipeline, one end of the tenth pipeline being connected to the fifth pipeline and the other end being connected to the second pipeline; wherein the tenth pipeline also has refrigerant; a 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.

[0010] The outdoor heat exchanger defrosting system provided by the embodiments of the present application can effectively utilize heat, optimize battery temperature management, and improve performance and lifespan when the battery temperature of the battery pack is higher than the second temperature threshold. By dynamically adjusting the states of solenoid valves and expansion valves under different conditions, the system can flexibly adapt to temperature changes in real time, ensuring optimal working conditions. The introduction of the tenth pipeline can more effectively utilize refrigerant circulation, reduce energy consumption, improve overall energy efficiency, and reduce dependence on external energy. By reasonably setting the working states of solenoid valves and expansion valves, the system can simplify control strategies, improve response speed, and enhance real-time adjustment capabilities. Dynamically adjusting valve states can reduce fluid flow instability, thereby improving the stability and reliability of the entire system.

[0011] In an optional embodiment, the motor electric control heat recovery device further comprises: a motor radiator arranged beside the motor; an electric control radiator 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; the engine radiator has 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 has 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 a fifth port of the water pump through a pipeline; a second three-way valve has a fourth valve, a fifth valve and a sixth valve, the fourth valve is connected to a 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 defrosting system of the vehicle external heat exchanger provided by the embodiment of the present application can more effectively recover the heat generated by the motor and the electric control device by connecting the motor radiator and the electric 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 electric control device and preventing overheating. The system can dynamically adjust the heat distribution according to the real-time temperature and the working state by using the first and second three-way valves, thereby improving the adaptability to different working conditions. By effectively recovering and utilizing the heat, the system can reduce the dependence on external cooling or heating sources, thereby reducing the energy consumption and improving the energy efficiency.

[0013] In the second aspect, the present application provides a defrosting method of a vehicle external heat exchanger, applied to the defrosting system of the vehicle external heat exchanger in the first aspect. When the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electric control heat recovery device is greater than the first temperature threshold, the method comprises: recovering the heat generated by the motor electric control heat recovery device by the refrigerant in the waste heat recovery plate; and recovering the heated refrigerant to heat the battery pack by sequentially passing through the gas-liquid separator, the compressor and the battery pack heat exchanger, and to defrost the vehicle external heat exchanger by sequentially passing through the gas-liquid separator, the compressor and the vehicle external heat exchanger.

[0014] The defrosting method of the vehicle external heat exchanger provided by the embodiment of the present application recovers the heat by using the refrigerant in the waste heat recovery plate, thereby realizing the heating of the battery pack and the defrosting of the vehicle external heat exchanger, so as to heat the battery pack and defrost the vehicle external heat exchanger by recovering the waste heat generated by the motor and the electric control device, thereby improving the energy utilization efficiency. By heating the battery pack, the battery can be kept running within the optimal working temperature range, thereby improving the performance of the battery and prolonging the service life of the battery. By effectively defrosting the vehicle external heat exchanger, the normal operation of the vehicle external heat exchanger in cold environments is ensured, the decline of the heat exchange efficiency caused by ice and frost accumulation is avoided, and the running safety of the vehicle is enhanced.

[0015] In an alternative embodiment, the first electromagnetic valve located in the second pipeline, the second electromagnetic valve located in the sixth pipeline, and the water pump included in the motor electric control heat recovery device are controlled to be turned on; the second expansion valve located in the third pipeline and the fourth expansion valve located in the seventh pipeline are controlled to increase the opening degree; the first expansion valve located in the second pipeline and the third expansion valve located in the fourth pipeline are controlled to decrease the opening degree.

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

[0017] In an alternative embodiment, the vehicle external heat exchanger defrosting system further comprises an indoor heat exchanger, a third electromagnetic valve, and a fourth electromagnetic valve; the indoor heat exchanger has an eighth inlet and an eighth outlet, the eighth inlet is connected with an eighth pipeline, and the eighth pipeline is connected with the second pipeline; the eighth outlet is connected with a ninth pipeline, and the ninth pipeline is connected with the third pipeline; when the defrosting working condition is the second defrosting working condition and the current outlet water temperature is greater than the first temperature threshold, the method further comprises: controlling the third electromagnetic valve located in the eighth pipeline and the fourth electromagnetic valve located in the ninth pipeline to be turned on.

[0018] The defrosting method of the vehicle external heat exchanger provided by the embodiment of the present application can effectively control the flow of refrigerant by adjusting the opening degree of the expansion valve, thereby optimizing the energy efficiency of the system and reducing unnecessary energy loss. Turning on the water pump and appropriately increasing the opening degree of the expansion valve can help to quickly improve the heat transfer efficiency, speed up the defrosting process, and improve the driving safety. Through flexible control of the electromagnetic valve and the expansion valve, the system can quickly respond to environmental changes, realize rapid adjustment, and improve the overall performance.

[0019] In an alternative embodiment, the vehicle external heat exchanger defrosting system further comprises a tenth pipeline and a fifth electromagnetic valve; one end of the tenth pipeline is connected with the fifth pipeline, and the other end is connected with the second pipeline; when the defrosting working condition is the third defrosting working 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 comprises: controlling the fifth electromagnetic valve located in the tenth pipeline to be turned on, and controlling the first electromagnetic valve to be turned off; controlling the first expansion valve to change from the decreasing opening degree state to the increasing opening degree state, controlling the second expansion valve to change from the increasing opening degree state to the decreasing opening degree state, and controlling the third expansion valve and the fourth expansion valve to change to the normal state.

[0020] The defrosting method of the vehicle external heat exchanger provided by the embodiment of the present application can cope with the third defrosting condition by introducing the tenth pipeline and the fifth electromagnetic valve and precisely controlling the electromagnetic valves and the expansion valve, so that the flow direction and flow rate of the cooling medium are adjusted in time by monitoring the battery temperature, which helps to avoid the battery pack from overheating or being affected by unsuitable temperature, thereby protecting the battery pack and prolonging the service life of the battery pack. Meanwhile, the operation of the electromagnetic valves and the expansion valve is precisely controlled, so that the defrosting process is more efficient, the vehicle external heat exchanger can maintain good working performance in a cold environment, and the driving safety is improved.

[0021] In a third aspect, the present application provides a vehicle external heat exchanger defrosting device, comprising: a recovery module configured to recover heat from refrigerant in a motor electric control heat recovery device; and a temperature adjustment module configured to heat the battery pack by sequentially passing the heat-containing refrigerant through a waste heat recovery plate, a gas-liquid separator, a compressor and a battery pack heat exchanger, and defrost the vehicle external heat exchanger by sequentially passing the heat-containing refrigerant through the waste heat recovery plate, the gas-liquid separator, the compressor and the vehicle external heat exchanger.

[0022] In a fourth aspect, the present application provides a computer device, comprising: a memory and a processor, which are in communication connection with each other, and the memory stores computer instructions; the processor executes the computer instructions to perform the vehicle external heat exchanger defrosting method of the second aspect or any of the corresponding embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 is a schematic diagram of a vehicle external heat exchanger defrosting system according to an embodiment of the present application;

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

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

[0027] Figure 4 is a schematic diagram of a motor electric control heat recovery device according to an embodiment of the present application;

[0028] Figure 5 is a flowchart of a vehicle external heat exchanger defrosting method according to an embodiment of the present application;

[0029] Figure 6 FIG. 6 is a flowchart of another defrosting method of a vehicle external heat exchanger according to an embodiment of the present application;

[0030] Figure 7 FIG. 7 is a flowchart of still another defrosting method of a vehicle external heat exchanger according to an embodiment of the present application;

[0031] Figure 8 FIG. 8 is a flowchart of yet another defrosting method of a vehicle external heat exchanger according to an embodiment of the present application;

[0032] Figure 9 FIG. 9 is a structural block diagram of a defrosting device of a vehicle external heat exchanger according to an embodiment of the present application;

[0033] Figure 10 FIG. 10 is a hardware structure schematic diagram of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

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

[0036] As a high-efficiency and energy-saving heating method, a heat pump system is widely used in battery heating and passenger cabin 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 in-vehicle space, improving the driving comfort and range of the vehicle in winter.

[0037] At present, the heat pump system operates in winter low-temperature conditions, and the vehicle external heat exchanger used as an evaporator will have frost formation, especially in areas with high humidity, which greatly reduces the comfort of the people in the vehicle and also increases the energy consumption of the automotive heat pump system.

[0038] Therefore, when the vehicle external heat exchanger needs to be defrosted, the battery waste heat, the motor electric control waste heat and the low-efficiency mode motor electric control heat can be used as the heat source of the evaporator in the heat pump system, and the vehicle internal heat exchanger can continuously heat the vehicle cabin, so that the passenger compartment comfort is ensured, and the winter heating efficiency is improved.

[0039] In the embodiment, a vehicle external heat exchanger defrosting system is provided, when the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electric control heat recovery device is greater than the first temperature threshold, as shown in the system comprises: a compressor 1, a gas-liquid separator 2, a battery pack heat exchanger 3, a waste heat recovery plate 4, a motor electric control heat recovery device 5 and a vehicle external heat exchanger 6. Figure 1

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

[0041] The compressor 1 sucks in 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 into the battery pack heat exchanger 3 and the vehicle external heat exchanger 6 through the first outlet. The refrigerant can be freon (fluorine chlorocarbon refrigerant such as R-22, R-134a), ammonia, carbon dioxide, etc., which is 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 by the waste heat recovery plate 4, so that only gaseous refrigerant enters the compressor 1 to prevent liquid refrigerant from entering the compressor 1 to cause 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 to ensure 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 a second pipeline, and the third outlet is connected with a 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, 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 to ensure that it works in an appropriate temperature range and avoid problems caused by overheating or overcooling. It can also help dissipate heat to avoid overheating of the battery and improve the safety of the battery. When fast charging, the battery will generate heat, and the battery pack heat exchanger 3 can help effectively dissipate heat to ensure stable charging process 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 used to recover waste heat generated by the motor-controlled heat recovery device 5 or the system. In the waste heat recovery plate 4, the refrigerant absorbs heat from the motor-controlled heat recovery device 5, transforming from a liquid to a gas or a gas-liquid mixture during this process. The fourth outlet of the waste heat recovery plate 4 delivers the gas-liquid mixture to the gas-liquid separator 2 via a 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 external 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. High-temperature, high-pressure gas delivered by the compressor 1 is input to the external heat exchanger 6 through the sixth pipeline to defrost the external heat exchanger 6.

[0051] The external heat exchanger 6 is a device used for heat exchange within the vehicle and is typically installed on the vehicle's exterior. It regulates the temperature inside and outside the vehicle through heat transfer. It 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 stagnant.

[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 the open state, the refrigerant in the sixth pipeline flows; when the second solenoid valve 9 is in the 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 of refrigerant in the second pipeline. When the opening of the first expansion valve 10 is increased, the flow and pressure of the refrigerant in the second pipeline are increased; when the opening of the first expansion valve 10 is decreased, the flow and pressure of the refrigerant in the second pipeline are decreased. 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 of refrigerant in the third pipeline. When the opening of the second expansion valve 11 is increased, the flow and pressure of the refrigerant in the third pipeline are increased; when the opening of the second expansion valve 11 is decreased, the flow and pressure of the refrigerant in the third pipeline are decreased. 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 of refrigerant in the fourth pipeline. When the opening of the third expansion valve 12 is increased, the flow and pressure of the refrigerant in the fourth pipeline are increased; when the opening of the third expansion valve 12 is decreased, the flow and pressure of the refrigerant in the fourth pipeline are decreased. 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 of refrigerant in the seventh pipeline. When the opening of the fourth expansion valve 13 is increased, the flow and pressure of the refrigerant in the seventh pipeline are increased; when the opening of the fourth expansion valve 13 is decreased, the flow and pressure of the refrigerant in the seventh pipeline are decreased. The fourth expansion valve 13 is connected to the seventh outlet of the outside heat exchanger 6.

[0059] 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.

[0060] When the defrosting condition is the first defrosting condition and the current outlet water temperature of the motor electric control 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, the first expansion valve 10 located on the second pipeline is in a decreasing opening state, the second expansion valve 11 located on the third pipeline is in an increasing opening state, the third expansion valve 12 located on the fourth pipeline is in a decreasing 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 increasing opening state, and the water pump 21 included in the motor electric control heat recovery device 5 is in an open state.

[0061] The first defrosting working condition is a working condition in which the battery pack needs to be heated and the vehicle exterior heat exchanger 6 needs to be defrosted. Whether the battery pack needs to be heated is determined according to 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 defrosting working condition is the first defrosting working condition and the current outlet water temperature of the motor electric control heat recovery device 5 is greater than the first temperature threshold, the vehicle exterior heat exchanger defrosting system enters a specific working state, that is, the first electromagnetic valve 8 is in an open state to allow fluid to pass through. The first expansion valve 10 is in a reduced opening state to limit the fluid flow to control the system pressure. The second expansion valve 11 is in an increased opening state to increase the fluid flow to promote heat transfer. The third expansion valve 12 is in a reduced opening state to limit the fluid flow to control the system pressure. The second electromagnetic valve 9 is in an open state to allow fluid to 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 fluid and the effective transfer of heat, thereby achieving the heating of the battery pack while defrosting the vehicle exterior heat exchanger 6.

[0063] The vehicle exterior heat exchanger defrosting system provided by the embodiment of the present application can effectively utilize the waste heat of the motor electric control heat recovery device under the first defrosting working condition through the optimized pipeline and component configuration, to ensure rapid defrosting. Based on the outlet water temperature and the set temperature threshold, the system can flexibly adjust the operating state to improve the energy efficiency and defrosting effect. Through reasonable pipeline connection, multiple components work cooperatively to ensure efficient flow and heat exchange of the refrigerant. The state settings of the electromagnetic valves and expansion valves in the system can be automatically adjusted according to the real-time working condition, to enhance 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 waste heat recovery design, the existing heat is maximally utilized to reduce energy consumption and improve the overall energy efficiency.

[0064] In the embodiment, a vehicle exterior heat exchanger defrosting system is provided. When the defrosting working condition is the second defrosting working condition and the current outlet water temperature is greater than the first temperature threshold, as shown in Figure 2 the vehicle exterior 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 electric control heat recovery device 5, a vehicle exterior heat exchanger 6 and a vehicle interior heat exchanger 7.

[0065] The compressor 1, the gas-liquid separator 2, the battery pack heat exchanger 3, the waste heat recovery plate 4, the motor electric control heat recovery device 5 and the vehicle exterior heat exchanger 6 are described in detail in the embodiment, which will not be described here. Figure 1

[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. 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 high-temperature, high-pressure gaseous refrigerant from the compressor 1 through the eighth pipeline. In the in-vehicle heat exchanger 7, the refrigerant releases heat through heat exchange with the outside air or engine coolant, gradually transforming into a low-temperature, low-pressure gas. This heat is then transferred to the air inside the vehicle compartment, thereby heating the vehicle interior.

[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 transports the low-temperature and low-pressure gas after releasing heat through the third pipeline.

[0069] Further, such as Figure 2 The illustrated exterior heat exchanger defrosting system 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 embodiments shown 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 open, the refrigerant in the eighth pipeline flows; when the third solenoid valve 14 is closed, 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 the flow of refrigerant in the ninth pipeline. When the fourth solenoid valve 15 is open, the refrigerant in the ninth pipeline flows; when the fourth solenoid valve 15 is closed, 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 defrosting working condition is a working condition in which the vehicle cabin needs to be heated, the battery pack needs to be heated, and the vehicle exterior heat exchanger 6 needs to be defrosted. Whether the vehicle cabin needs to be heated is determined by a heating instruction input by a user to the vehicle, for example, the user pressing a button for blowing warm air by the vehicle air conditioner. Specifically, when the defrosting working condition is the second defrosting working condition and the current outlet water temperature of the motor electric control heat recovery device 5 is greater than the first temperature threshold, the third electromagnetic valve 14 and the fourth electromagnetic valve 15 are both in an open state, indicating that they are allowing the refrigerant to flow through the corresponding eighth pipeline and ninth pipeline for effective heat transfer, thereby achieving heating of the vehicle cabin and the battery pack while defrosting the vehicle exterior heat exchanger 6.

[0076] The vehicle exterior heat exchanger defrosting system provided by the embodiments of the present application not only supports vehicle exterior 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 vehicle interior heat exchanger, heat can be effectively transferred to the vehicle interior, enhancing 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 vehicle interior heat exchanger enables the system to flexibly adjust the temperature inside the vehicle according to different working conditions, meeting different needs.

[0077] In the present embodiment, a vehicle exterior heat exchanger defrosting system is provided. When the defrosting working condition is the third defrosting working 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 shown in Figure 3 the vehicle exterior 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 electric control heat recovery device 5, a vehicle exterior heat exchanger 6, a vehicle interior heat exchanger 7, and a tenth pipeline.

[0078] The compressor 1, the gas-liquid separator 2, the battery pack heat exchanger 3, the waste heat recovery plate 4, the motor electric control heat recovery device 5, the vehicle exterior heat exchanger 6, and the vehicle interior heat exchanger 7 are described in detail in the embodiments shown in Figure 2 , which will not be described here again.

[0079] The tenth pipeline is connected to the fifth pipeline at one end and to the second pipeline at the other end.

[0080] The liquid refrigerant output by the vehicle exterior heat exchanger 6 passes through the seventh pipeline and the third pipeline in sequence and is 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 simultaneously converts the refrigerant from a liquid state to a gaseous state. 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, which is then delivered to the in-vehicle heat exchanger 7 for heating the vehicle cabin 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 embodiments shown 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 open, the refrigerant in the tenth pipeline flows; when the fifth solenoid valve 16 is closed, 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 located on the tenth pipeline is in the open state, the first solenoid valve 8 located on the second pipeline is in the closed state, the first expansion valve 10 is in the reduced opening state, and the fourth expansion valve 13 is in the increased opening state.

[0088] The third defrosting working condition is a working 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 for determining whether the battery temperature of the battery pack meets the operating condition of the system in the third defrosting working condition. Specifically, the fifth electromagnetic valve 16 is in an open state, allowing the refrigerant to flow in the tenth pipeline. The first electromagnetic valve 8 is in a closed state, i.e., the high-temperature and high-pressure gaseous refrigerant output by the compressor 1 no longer enters the battery pack heat exchanger 3, and the battery pack is not heated. The first expansion valve 10 reduces the flow of refrigerant by reducing the opening degree, and the fourth expansion valve 13 allows more refrigerant to flow in by increasing the opening degree, thereby improving the heat exchange capacity of the system and achieving heating of the vehicle compartment while defrosting the external heat exchanger 6.

[0089] The external heat exchanger defrosting system provided by the embodiment of the present application can effectively utilize heat, optimize temperature management of the battery, and improve performance and service life of the battery when the battery temperature of the battery pack is higher than the second temperature threshold. By dynamically adjusting the states of the electromagnetic valves and the expansion valves under different working conditions, the system can flexibly adapt to temperature changes in real time to ensure optimal working conditions. The introduction of the tenth pipeline can more effectively utilize refrigerant circulation, reduce energy consumption, improve overall energy efficiency, and reduce dependence on external energy. By reasonably setting the working states of the electromagnetic valves and the expansion valves, the system can simplify control strategies, improve response speed, and enhance real-time adjustment capabilities of the system. Dynamic adjustment of valve states can reduce instability of fluid flow, thereby improving stability and reliability of the entire system.

[0090] In the embodiment, a motor electric control heat recovery device 5 is provided, as shown in the figure, the motor electric control heat recovery device 5 comprises a motor radiator 17, an electric control radiator 18, an engine radiator 19, a first three-way valve 20, a water pump 21 and a second three-way valve 22. Figure 4

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

[0092] The motor radiator 17 is used for radiating heat of the motor, and the motor radiator 17 is arranged beside the motor, wherein the beside can be around or below the motor, which is not limited herein.

[0093] The electric control radiator 18 cools heat generated by an electric control device (such as an electric controller, a frequency converter, etc.). The electric control radiator 18 is arranged beside the electric control device, wherein the beside can be around or below the motor, which is not limited herein. 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, and 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 electric control 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. 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 sends the cooling medium to the third valve of the first three-way valve 20 through the fifth port, and the third valve sends the cooling medium to the engine radiator 19 to cool the engine. The second valve of the first three-way valve 20 sends 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 the heat of the generator, the motor and the electric 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 sends the cooling medium carrying the heat to the waste heat recovery plate 4.

[0099] Among them, the heat of the motor and the electric control device is slowly rising, so it is not necessary to cool the motor and the electric control device at the beginning of the system operation, and the second port of the second three-way valve 22 is closed.

[0100] The vehicle external heat exchanger defrosting system provided by the embodiment of the present application can more effectively recover the heat generated by the motor and the electric control device by connecting the motor radiator and the electric 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 electric control device and preventing overheating. By using the first and second three-way valves, the system can dynamically adjust the heat distribution according to the real-time temperature and working state, thereby improving the adaptability to different working conditions. By effectively recovering and utilizing the heat, the system can reduce the dependence on external cooling or heating sources, thereby reducing energy consumption and improving energy efficiency.

[0101] According to the embodiment of the present application, a vehicle external heat exchanger defrosting method 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 the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in a different order.

[0102] In this embodiment, a vehicle external heat exchanger defrosting method is provided, which is applied to Figure 1 a vehicle external heat exchanger defrosting system as shown in the accompanying drawings, Figure 5 is a flowchart of the vehicle external heat exchanger defrosting method according to the embodiment of the present application, which includes the following steps as shown in the accompanying drawings. Figure 5

[0103] Step S101, the heat generated by the motor electric control heat recovery device is recovered by the refrigerant in the waste heat recovery plate.

[0104] The generator, motor and electrical control device will generate heat when working, and the water pump 21 in the motor electric control heat recovery device 5 controls the cooling medium to pass through the engine radiator 19, motor radiator 17 and electric control radiator 18 in turn, 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 electric control heat recovery device, and converts the heat into gaseous refrigerant.

[0105] Step S102, the heat recovery of the refrigerant passes through the gas-liquid separator, compressor and battery pack heat exchanger in turn to heat the battery pack, and passes through the gas-liquid separator, compressor and vehicle external heat exchanger in turn to defrost the vehicle external heat exchanger.

[0106] The gaseous refrigerant with 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 to heat the battery pack; at the same time, the compressed high-temperature and high-pressure gas is transported to the vehicle external heat exchanger 6 through the sixth pipeline to defrost it.

[0107] ​The defrosting method of the vehicle external heat exchanger provided by the embodiment of the present application recovers heat by using the refrigerant in the waste heat recovery plate, and then realizes heating of the battery pack and defrosting of the vehicle external heat exchanger, so that the waste heat generated by the motor and the electric control is recovered to heat the battery pack and defrost the vehicle external heat exchanger, thereby improving the energy utilization efficiency. By heating the battery pack, the battery is kept operating within the optimal operating temperature range, so that the performance of the battery is improved and the service life thereof is prolonged. By effectively defrosting the vehicle external heat exchanger, the normal operation of the vehicle external heat exchanger in a cold environment is ensured, the heat exchange efficiency caused by ice and frost accumulation is avoided, and the operation safety of the vehicle is enhanced.

[0108] In the embodiment, a defrosting method of a vehicle external heat exchanger is provided, which is applied to Figure 1 a defrosting system of a vehicle external heat exchanger as shown in the figure, Figure 6 is a flow chart of the defrosting method of the vehicle external heat exchanger according to the embodiment of the present application, which includes the following steps as shown in the figure: Figure 6

[0109] Step S201: The first electromagnetic valve located in the second pipeline, the second electromagnetic valve located in the sixth pipeline, and the water pump included in the motor electric control heat recovery device are turned on.

[0110] It is determined whether the vehicle external heat exchanger 6 needs to be defrosted, wherein the defrosting method can include a compressor suction and exhaust pressure ratio method, a timing defrosting method, a temperature difference control method, etc., which is not limited herein. If it is determined that the vehicle external heat exchanger 6 needs to be defrosted, it is confirmed whether the motor electric control heat recovery device 5 has an outlet water temperature greater than a first temperature threshold, i.e., the first temperature threshold is the lower limit temperature of waste heat recovery. When the outlet water temperature of the motor electric control is greater than the first temperature threshold, the first electromagnetic valve 8, the second electromagnetic valve 9, and the water pump 21 are turned on.

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

[0112] Step S202: The second expansion valve located in the third pipeline and the fourth expansion valve located in the seventh pipeline are controlled to increase the opening degree.

[0113] The second expansion valve 11 and the fourth expansion valve 13 are controlled to be in a full opening mode, wherein the full opening mode is that the second expansion valve 11 and the fourth expansion valve 13 are selected to be large-diameter electronic expansion valves, and the full opening is not throttling.

[0114] Step S203: The first expansion valve located in the second pipeline and the third expansion valve located in the fourth pipeline are controlled to decrease the opening degree.

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

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

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

[0118] When the water temperature at the outlet of the motor electronic control coolant is lower than the first temperature threshold, the motor and the electrical control device are switched to a 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 external 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] In 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 heat exchanger in sequence to defrost the vehicle 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 the present invention, adjusting the expansion valve opening effectively controls the refrigerant flow rate, thereby optimizing the system's energy efficiency and reducing unnecessary energy loss. Turning on the water pump and appropriately increasing the expansion valve opening helps rapidly improve heat transfer efficiency, expedite the defrosting process, and enhance driving safety. Through flexible control of the solenoid valve and expansion valve, the system can rapidly respond to environmental changes, achieve rapid adjustments, 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 outdoor heat exchanger defrost system shown, Figure 7 FIG. 1 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 electromagnetic valve located in the second pipeline, the second electromagnetic valve located in the sixth pipeline and the water pump included in the motor electric control heat recovery device are opened. For details, please refer to Figure 6 The step S201 of the embodiment shown will not be repeated here.

[0124] Step S302, control the third electromagnetic valve located in the eighth pipeline and the fourth electromagnetic valve located in the ninth pipeline are opened.

[0125] According to the preset defrosting judgment mode, it is judged whether the vehicle outside heat exchanger 6 needs to be defrosted, whether the battery pack needs to be heated according to the battery temperature, and whether the vehicle cabin needs to be heated according to the heating instruction input by the user. When it is determined that the vehicle outside heat exchanger 6 needs to be defrosted, the battery pack needs to be heated, and the vehicle cabin needs to be heated, when the motor electric control cooling liquid outlet water temperature is greater than the first temperature threshold, the third electromagnetic valve 14 and the fourth electromagnetic 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 the opening degree. For details, please refer to Figure 6 The step S202 of the embodiment shown will not be repeated 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 the opening degree. For details, please refer to Figure 6 The step S203 of the embodiment shown will not be repeated here.

[0128] Step S305, the heat generated by the motor electric control heat recovery device is recovered by the refrigerant in the waste heat recovery plate. For details, please refer to Figure 6 The step S204 of the embodiment shown will not be repeated here.

[0129] Step S306, the heat-containing refrigerant sequentially passes through the gas-liquid separator, the compressor and the battery pack heat exchanger to heat the battery pack, and sequentially passes through the gas-liquid separator, the compressor and the vehicle outside heat exchanger to defrost the vehicle outside heat exchanger. For details, please refer to Figure 6 The step S205 of the embodiment shown will not be repeated here.

[0130] The vehicle outside heat exchanger defrosting method provided by the embodiment of the application can increase the flow of heat by controlling the opening of the electromagnetic valve in the second defrosting working condition, quickly remove the frost layer on the vehicle outside heat exchanger, and shorten the defrosting time. The heat of the vehicle inside heat exchanger can be used to realize flexible heat distribution and ensure the heat management effect of the inside and outside of the vehicle. By precisely controlling the running 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 electromagnetic valve, and improve the dynamic adjustment capability of the system.

[0131] A defrosting method of an external heat exchanger is provided in the embodiment, which is applied to Figure 3 The defrosting system of the external heat exchanger is shown in the figure, Figure 8 The flow chart of the defrosting method of the external heat exchanger according to the embodiment of the present application is shown in the figure, which includes the following steps: Figure 8 The flow chart of the defrosting method of the external heat exchanger according to the embodiment of the present application is shown in the figure, which includes the following steps:

[0132] Step S401, control the water pump included in the sixth pipeline second electromagnetic valve and the motor electric control heat recovery device to be opened. For details, please refer to the step S301 of the embodiment shown in the figure, which will not be repeated here. Figure 7

[0133] Step S402, control the fifth electromagnetic valve located in the tenth pipeline to be opened.

[0134] According to the preset defrosting judgment mode, it is judged whether the external heat exchanger 6 needs to be defrosted, and it is determined whether the cabin needs to be heated according to the heating instruction input by the user. When it is determined that the external heat exchanger 6 needs to be defrosted and the cabin needs to be heated, and 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 electromagnetic valve 16 is opened.

[0135] Step S403, control the first expansion valve to increase the opening degree and control the second expansion valve to decrease the opening degree, and open 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 decrease the opening degree, so that the heat dissipation outlet refrigerant superheat degree of the battery pack heat exchanger 3, 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, absorbs battery heat, and defrosts the external heat exchanger 6, while the internal heat exchanger 7 is in an open state to ensure that the indoor temperature does not decrease.

[0137] If the battery temperature of the battery pack is less 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 electromagnetic valve 16 is kept in a closed state.

[0138] When the motor electric control cooling liquid outlet water temperature 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 opened, and the waste heat of the motor and the electric control device is used as the heat source of the waste heat recovery plate 4 to defrost the external heat exchanger 6, while ensuring that the indoor temperature does not decrease.

[0139] When the motor electric control cooling liquid outlet water temperature is less than the first temperature threshold, the motor and the electric control device are switched to a low efficiency mode, and the heat generated thereby is used as the heat source of the waste heat recovery plate 4 to defrost the external heat exchanger 6, while ensuring that the indoor temperature does not decrease.

[0140] ​Step S404, the heat generated by the motor electric control heat recovery device is recovered by the refrigerant in the waste heat recovery plate. For details, please refer to Figure 7 Step S101 of the embodiment shown, which will not be repeated here.

[0141] Step S405, the heated refrigerant is sequentially passed through the gas-liquid separator, compressor and battery pack heat exchanger to heat the battery pack, and sequentially passed through the gas-liquid separator, compressor and vehicle external heat exchanger to defrost the vehicle external heat exchanger. For details, please refer to Figure 7 Step S102 of the embodiment shown, which will not be repeated here.

[0142] The vehicle external heat exchanger defrosting method provided by the embodiment of the application introduces the tenth pipeline and the fifth electromagnetic valve, and accurately controls the electromagnetic valve and the expansion valve to cope with the third defrosting working condition, so that the flow direction and flow rate of the cooling medium are adjusted in time by monitoring the battery temperature, which helps to avoid overheating or being affected by unsuitable temperature of the battery pack, thereby protecting the battery pack and prolonging its service life. At the same time, accurate control of the operation of each electromagnetic valve and expansion valve makes the defrosting process more efficient, ensures that the vehicle external heat exchanger maintains good working performance in cold environments, and improves driving safety.

[0143] In the embodiment, a vehicle external heat exchanger defrosting device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be repeated here. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and contemplated.

[0144] The embodiment provides a vehicle external heat exchanger defrosting device, as shown in Figure 9 comprises:

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

[0146] The temperature adjustment module 502 is used to sequentially pass the heated refrigerant through the gas-liquid separator, compressor and battery pack heat exchanger to heat the battery pack, and sequentially pass the heated refrigerant through the gas-liquid separator, compressor and vehicle external heat exchanger to defrost the vehicle external heat exchanger.

[0147] The further function description of each module and unit above is the same as the corresponding embodiment described above, and will not be repeated here.

[0148] The defrosting device for the outdoor heat exchanger 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 external heat exchanger defrosting device 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 external heat exchanger. This improves energy efficiency by recovering waste heat generated by the motor and electronic control to heat the battery pack and defrost the external heat exchanger. By heating the battery pack and maintaining the battery within its optimal operating temperature range, battery performance and life can be improved. Effective external heat exchanger defrosting ensures normal operation in cold environments, avoids a decrease in heat exchange efficiency due to frost accumulation, and enhances vehicle safety.

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

[0151] See also Figure 10 , Figure 10 is a structural diagram of a computer device provided by an optional embodiment of the present invention, such as Figure 10 As shown, the computer device includes: one or more processors 100, memory 200, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components utilize different buses to communicate with each other 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 a 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. Equally, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 10 A processor 100 is taken as an example.

[0152] The processor 100 may be a central processing unit (CPU), a network processor (NPU), or a combination thereof. The processor 100 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device (PLD) may be a complex programmable logic device (CPLD), a field programmable gate array (FPGA), a general purpose array logic (GAL), or any combination thereof.

[0153] The memory 200 stores instructions executable by the at least one processor 100 to cause the at least one processor 100 to perform the methods implemented by the above-mentioned embodiments.

[0154] The memory 200 can include a program region and a data region. The program region can store an operating system and application programs required by at least one function. The data region can store data created according to the use of the computer device, and the like. In addition, the memory 200 can include a high-speed random access memory, and can further include a non-transitory memory such as at least one of a magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some optional embodiments, the memory 200 can optionally include a memory disposed remotely with respect to the processor 100, and these remote memories can be connected to the computer device through 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 a combination thereof.

[0155] The memory 200 can include a volatile memory such as a random access memory, and can also include a non-volatile memory such as a flash memory, a hard disk, or a solid-state disk. The memory 200 can further include a combination of the above-mentioned kinds of memories.

[0156] The computer device further 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 can be connected through a bus or other means, Figure 10 Figure 10 For example, by way of example, through a bus connection.

[0157] The input device 300 can receive input digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touchpad, a pointing stick, one or more mouse buttons, a trackball, a joystick, and the like. The output device 400 can include a display device, an auxiliary lighting device (e.g., an LED), a tactile feedback device (e.g., a vibration motor), and the like. 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 above-mentioned method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, 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 drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0160] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0161] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0162] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0163] Although the embodiments of the application are described in conjunction with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A defrosting system for an off-board heat exchanger, characterized in that: When the defrost operating condition is the first defrost operating 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 via a first pipeline; The battery pack heat exchanger is located next to 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; a motor electronically controlled heat recovery device having 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-board heat exchanger having a seventh inlet and a seventh outlet, wherein the seventh inlet is connected to a sixth pipeline, and the sixth pipeline is 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; In which, 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; and the water pump included in the motor-controlled heat recovery device is in an open state.

2. The system according to claim 1, wherein: 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 provided 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; In which, refrigerant is also provided 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, wherein: The motor electronically controlled heat recovery device further comprises: The motor radiator is arranged beside the motor; An electrically controlled radiator is provided beside the electrical control device; wherein the electrically 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, 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, 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 defrosting method for an off-vehicle heat exchanger, characterized in that: Applicable to the off-vehicle heat exchanger defrosting system of claim 1, when the defrosting operating condition is the first defrosting operating condition and the current outlet water temperature of the motor-controlled heat recovery device is greater than the first temperature threshold, the method includes: Recover the heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate; The refrigerant with recovered heat passes through the gas-liquid separator, compressor and battery pack heat exchanger in sequence to heat the battery pack, and passes through the gas-liquid separator, compressor and 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: 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; 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 defrost system further 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 operating condition is the second defrost operating 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 defrost system further 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 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 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 external heat exchanger, characterized in that: The device is used to perform the defrosting method for an off-vehicle heat exchanger according to any one of claims 5 to 8, comprising: A recovery module for recovering heat generated by the motor-controlled heat recovery device through the refrigerant in the waste heat recovery plate; The temperature regulation module is used to recover the heat-containing refrigerant and heat the battery pack through the gas-liquid separator, compressor and battery pack heat exchanger in sequence, and defrost the external heat exchanger through the gas-liquid separator, compressor and 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 external vehicle heat exchanger defrosting method according to any one of claims 5 to 8 by executing the computer instructions.

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