Defrosting control method and system, storage medium and vehicle

Abstract

The invention discloses a defrosting control method and system, a storage medium and a vehicle. The method comprises the steps that the environment temperature and the working mode of the multi-way valve are obtained; the environment temperature and the working mode of the multi-way valve are compared with preset defrosting starting conditions, and a comparison result is obtained; and controlling the heat management system to enter a defrosting mode in response to the fact that the comparison result shows that the environment temperature and the multi-way valve working mode meet the preset defrosting starting condition. The technical problem that in the prior art, a defrosting control strategy is not perfect enough is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of operation control of refrigeration equipment, in particular to a defrosting control method and system, a storage medium and a vehicle. BACKGROUND

[0002] In the existing thermal management system, the defrosting control strategy is usually single, mainly depending on the environmental temperature to determine whether to start the defrosting mode. Therefore, the defrosting control strategy in the prior art is not perfect.

[0003] For the above problems, no effective solution has been proposed so far. SUMMARY

[0004] The embodiments of the present application provide a defrosting control method, system, storage medium and vehicle to at least solve the technical problem that the defrosting control strategy in the prior art is not perfect.

[0005] According to one aspect of the embodiments of the present application, a defrosting control method is provided, comprising: obtaining an environmental temperature and a multi-way valve working mode; comparing the environmental temperature and the multi-way valve working mode with a preset defrosting starting condition to obtain a comparison result; and in response to the comparison result indicating that the environmental temperature and the multi-way valve working mode meet the preset defrosting starting condition, controlling the thermal management system to enter a defrosting mode.

[0006] Further, in response to the comparison result indicating that the environmental temperature and the multi-way valve working mode meet the preset defrosting starting condition, controlling the thermal management system to enter the defrosting mode includes: in response to the comparison result indicating that the environmental temperature is less than a first preset temperature threshold, the multi-way valve working mode is a preset mode, and a difference between the refrigerant outlet water temperature and the environmental temperature is less than a first preset difference and a duration is greater than or equal to a first preset duration, controlling the thermal management system to enter the defrosting mode.

[0007] Further, in response to the comparison result indicating that the environmental temperature and the multi-way valve working mode meet the preset defrosting starting condition, controlling the thermal management system to enter the defrosting mode includes: in response to the comparison result indicating that the environmental temperature is less than a second preset temperature threshold, the multi-way valve working mode is a preset mode, and a difference between the environmental temperature and the refrigerant outlet water temperature is greater than a second preset difference and a duration is greater than or equal to a second preset duration, controlling the thermal management system to enter the defrosting mode; wherein the second preset temperature threshold is less than the first preset temperature threshold, the second preset difference is greater than the first preset difference, and the second preset duration is less than the first preset duration.

[0008] Further, the defrosting control method further comprises: in response to the refrigeration fan being closed and the electric drive system inlet water temperature being greater than a third preset temperature threshold and a duration being greater than a third preset duration, controlling the thermal management system to exit the defrosting mode.

[0009] Further, the defrosting control method further comprises: obtaining a vehicle state parameter; and in response to the vehicle state parameter indicating that a lock signal is detected, a passenger cabin air conditioner is turned off, and a battery request is turned off, controlling the thermal management system to enter a lock defrosting mode.

[0010] Further, the defrosting control method further comprises: in response to the vehicle state parameter indicating that a parking state duration or a charging gun insertion duration is greater than a fourth preset duration, the passenger cabin air conditioner is turned off, and the battery request is turned off, controlling the thermal management system to enter a parking defrosting mode.

[0011] According to another aspect of the embodiment of the present application, a defrosting control system is also provided, comprising: an obtaining module configured to obtain an ambient temperature and a multi-way valve working mode; a comparison module configured to compare the ambient temperature and the multi-way valve working mode with preset defrosting starting conditions to obtain a comparison result; and a control module configured to, in response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting starting conditions, control a thermal management system to enter a defrosting mode.

[0012] Further, the control module is further configured to, in response to the comparison result indicating that the ambient temperature is less than a first preset temperature threshold, the multi-way valve working mode is a preset mode, and a difference between a refrigerant outlet water temperature and the ambient temperature is less than a first preset difference and a duration is greater than or equal to a first preset duration, control the thermal management system to enter the defrosting mode.

[0013] Further, the control module is further configured to, in response to the comparison result indicating that the ambient temperature is less than a second preset temperature threshold, the multi-way valve working mode is the preset mode, and a difference between the ambient temperature and the refrigerant outlet water temperature is greater than a second preset difference and a duration is greater than or equal to a second preset duration, control the thermal management system to enter the defrosting mode; wherein the second preset temperature threshold is less than the first preset temperature threshold, the second preset difference is greater than the first preset difference, and the second preset duration is less than the first preset duration.

[0014] Further, the control module is further configured to, in response to the refrigeration fan being turned off and an electric drive system inlet water temperature being greater than a third preset temperature threshold and a duration being greater than a third preset duration, control the thermal management system to exit the defrosting mode.

[0015] Further, the control module is further configured to obtain a vehicle state parameter; and in response to the vehicle state parameter indicating that a lock signal is detected, a passenger cabin air conditioner is turned off, and a battery request is turned off, control the thermal management system to enter a lock defrosting mode.

[0016] Further, the control module is further configured to, in response to the vehicle state parameter indicating that a parking state duration or a charging gun insertion duration is greater than a fourth preset duration, the passenger cabin air conditioner is turned off, and the battery request is turned off, control the thermal management system to enter a parking defrosting mode.

[0017] According to another aspect of the embodiments of the present application, a vehicle is also provided, comprising a memory storing an executable program; and a processor configured to execute the program, wherein the program, when executed, performs any of the methods described above.

[0018] According to another aspect of the embodiments of the present application, an electronic device is also provided, comprising a memory storing an executable program; and a processor configured to execute the program, wherein the program, when executed, performs any of the methods described above.

[0019] According to another aspect of the embodiments of the present application, a computer-readable storage medium is also provided, comprising a stored executable program, wherein the executable program, when executed, controls a device in which the computer-readable storage medium is located to perform any of the methods described above.

[0020] According to another aspect of the embodiments of the present application, a computer program product is also provided, comprising a computer program which, when executed by a processor, implements any of the methods described above.

[0021] In the embodiments of the present application, the intelligent defrosting control algorithm is adopted, the ambient temperature and the working mode of the multi-way valve are obtained first, and then the ambient temperature and the working mode of the multi-way valve are compared with the preset defrosting starting condition to obtain a comparison result. If the comparison result shows that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting condition, the heat management system is controlled to enter the defrosting mode, thereby achieving the purpose of effectively preventing and removing the frost on the surface of the heat exchanger, and realizing the technical effects of improving the energy efficiency ratio and stability of the heat management system, and further solving the technical problem of the imperfect defrosting control strategy in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings: Figure 1 is a flow chart of the defrosting control method according to the embodiments of the present application; Figure 2 is a schematic diagram of the heat management system according to the embodiments of the present application; Figure 3 is a schematic diagram of the defrosting control system of the multi-way valve in mode 1 according to the embodiments of the present application; Figure 4 is a schematic diagram of the defrosting control system of the multi-way valve in mode 2 according to the embodiments of the present application; Figure 5 is a schematic diagram of the defrosting control system of the multi-way valve in mode 3 according to the embodiments of the present application; Figure 6 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 4 according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 5 according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 7 according to an embodiment of the present invention;

[0023] Figure 9 This is a block diagram of a defrosting control system according to an embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] According to an embodiment of the present invention, an embodiment of a defrosting control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] Figure 1 This is a flowchart of a defrosting control method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps: Step S10: Obtain the ambient temperature and the operating mode of the multi-way valve;

[0028] In the embodiment of the present application, the ambient temperature is usually obtained by a temperature sensor installed outside the vehicle or around the thermal management system, for real-time monitoring of the temperature conditions of the vehicle operating environment.

[0029] The acquisition of the multi-way valve working mode depends on the real-time monitoring of the thermal management system, including but not limited to reading the switch state, flow control information, etc. of the multi-way valve, to determine whether the multi-way valve is in a configuration conducive to defrosting operation.

[0030] Acquiring the ambient temperature and the multi-way valve working mode can be understood as, in this stage, the sensors or environmental monitoring units of the system are responsible for collecting the temperature data of the external environment and the current working state of the multi-way valve.

[0031] As can be seen, by real-time monitoring of the ambient temperature and the working state of the multi-way valve, the system can acquire the operating environment and internal configuration of the thermal management system, so as to timely capture the external condition changes that may trigger the defrosting demand and the ready state of the system, ensuring that the defrosting program can be activated at the most appropriate time, thereby helping to improve the effectiveness and accuracy of defrosting and reduce unnecessary energy consumption.

[0032] In step S12, the ambient temperature and the multi-way valve working mode are compared with the preset defrosting start condition to obtain a comparison result.

[0033] In the embodiment of the present application, the preset defrosting start condition may include but is not limited to: the ambient temperature is lower than a certain threshold (for example, lower than 0℃), the multi-way valve is in a specific mode (such as a hot bypass mode), the difference between the refrigerant outlet water temperature and the ambient temperature is less than a preset difference and lasts for a certain time (for example, the temperature difference is less than 5℃ and lasts for 5 minutes).

[0034] Comparing the ambient temperature and the multi-way valve working mode with the preset defrosting start condition to obtain a comparison result can be understood as matching the real-time ambient temperature and the multi-way valve working mode acquired in step S10 with the preset defrosting start condition. Through comparison, the system can determine whether the current conditions meet the defrosting start conditions, thereby obtaining the comparison result.

[0035] As can be seen, by accurately comparing the real-time collected data with the preset defrosting start condition, the system can make an accurate decision to determine whether the defrosting program needs to be started, thereby helping to avoid the defrosting program from being started in unnecessary cases, preventing energy waste and unnecessary interference to the system. At the same time, through this step, the system can also ensure a quick response when the defrosting conditions are met, defrosting in time, maintaining the efficiency of the heat exchanger, and prolonging the service life of the system.

[0036] In step S14, in response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting start condition, the thermal management system is controlled to enter the defrosting mode.

[0037] In this embodiment of the invention, Figure 2 This is a schematic diagram of a thermal management system according to an embodiment of the present invention, such as... Figure 2 As shown, responding to the comparison results indicating that the ambient temperature and the multi-way valve operating mode meet the preset defrosting start conditions, controlling the thermal management system to enter defrosting mode can be understood as follows: when the comparison results in step S12 show that the current conditions match the preset defrosting start conditions, i.e., the ambient temperature is low enough, and Figure 2 If the multi-way valve operates in the correct mode and other conditions (such as temperature difference and duration) are met, the system will activate the defrosting program, such as increasing the refrigerant outlet water temperature, controlling the fan to stop working, and adjusting the position of the multi-way valve, to promote the melting of frost on the heat exchanger surface.

[0038] Understandably, when Figure 2 The defrosting control system schematic diagram in this application is different when the multi-way valve is in different working modes. Figure 3 This is a schematic diagram of a defrosting control system for a multi-way valve in mode 1 according to an embodiment of the present invention. It is applied to scenarios such as electric drive cooling, active battery cooling or temperature equalization, and single-temperature zone refrigeration of the cabin. In this system, a water-cooled refrigerator is connected in series with an electric drive system, and the refrigerator is connected in series with a cooler and a power supply. The water flow to the battery is controlled by a three-way proportional valve 1, and the electric drive system is connected in series with a radiator. Figure 4 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 2 according to an embodiment of the present invention, as shown below. Figure 4 As shown, it is applied in scenarios such as electric drive cooling, active battery cooling or temperature equalization, cabin single-temperature zone cooling and heating, and radiator defrosting. In this case, the water-cooled refrigerator is connected in series with the electric drive system and the radiator, the refrigerator is connected in series with the cooler and the power supply, and the water flow to the battery is controlled by a three-way proportional valve 1. The electric drive system is connected in series with the radiator. Figure 5 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 3 according to an embodiment of the present invention, as shown below. Figure 5 As shown, this is applied in scenarios such as water heater heating the battery and cabin, heat pump heating the battery and cabin, and electric drive cooling. In this scenario, the water-cooled refrigerator is connected in series with the radiator and the battery / radiator / battery, the refrigerator is connected in series with the electric drive system, and the radiator is used for heat dissipation. Figure 6 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 4 according to an embodiment of the present invention, as shown below. Figure 6 As shown, this is applied in scenarios such as water heater heating the battery and cabin, heat pump heating the battery and cabin, and electric drive cooling. In this case, the water-cooled refrigerator is connected in series with the radiator, and the refrigerator is connected in series with the electric drive system. Figure 7 This is a schematic diagram of the defrosting control system of the multi-way valve in mode 5 according to an embodiment of the present invention, as shown below. Figure 7 As shown, this is applied in scenarios where a water heater heats a battery, a heat pump heats a battery, and an electric drive cools the battery. In this case, the water-cooled refrigerator is connected in series with the battery, and the refrigerator is connected in series with the electric drive system.Figure 8 is a defrosting control system schematic diagram of the multi-way valve according to the embodiment of the present application in mode 7, as shown, applied to the scene of electric heat dissipation, battery passive cooling, battery waste heat recovery, heat pump / water heater heating passenger cabin, wherein the refrigerators are connected in series with the electric drive system and the battery, and the water-cooled refrigerator is connected in series with the radiator. Figure 8

[0039] It can be seen that if the defrosting condition meets the preset condition, the system will adjust the thermal management system into the defrosting mode, thereby effectively ensuring that the heating or air conditioning system of the vehicle is maintained in the best working state.

[0040] Through the above steps, first, the ambient temperature and the working mode of the multi-way valve are obtained, and then the ambient temperature and the working mode of the multi-way valve are compared with the preset defrosting starting condition to obtain a comparison result. If the comparison result shows that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting condition, the thermal management system is controlled to enter the defrosting mode, thereby achieving the purpose of effectively preventing and removing the frost on the surface of the heat exchanger, and realizing the technical effects of improving the energy efficiency ratio and stability of the thermal management system, and further solving the technical problem that the defrosting control strategy in the prior art is not perfect.

[0041] Optionally, in step S14, in response to the comparison result showing that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting condition, controlling the thermal management system to enter the defrosting mode includes the following execution steps:

[0042] Step S141, in response to the comparison result showing that the ambient temperature is less than the first preset temperature threshold, the working mode of the multi-way valve is the preset mode, and the difference between the refrigerant outlet water temperature and the ambient temperature is less than the first preset difference and the duration is greater than or equal to the first preset duration, the thermal management system is controlled to enter the defrosting mode.

[0043] In the embodiment of the present application, the first preset temperature threshold is a lower limit of the ambient temperature preset by the system according to the design target and actual needs. When the external ambient temperature is lower than the threshold, the system will start the defrosting program. The first preset temperature threshold is usually set in the temperature range prone to frost, such as 0°C or lower, and the specific value may be different according to the regional climate, vehicle use, and design of the thermal management system, which is not limited here.

[0044] The preset mode is a specific setting of the working mode of the multi-way valve, which is usually preset as the mode most suitable for defrosting. In this mode, the multi-way valve will be adjusted to a position that can guide the heat source to deliver more heat to the heat exchanger, so as to accelerate the melting of the frost layer.

[0045] It can be understood that the preset mode of the multi-way valve in step S141 can be Figure 5 、 Figure 6 、 Figure 7 and​Figure 8 Any of the modes shown in any of the above.

[0046] The refrigerant outlet water temperature is the temperature of the refrigerant circulating in the heat management system after leaving the heat exchanger (i.e. the outlet water point). The temperature of the refrigerant is an important indicator of the working state of the heat exchanger, and is one of the bases for whether the defrosting program can be effectively run.

[0047] The first preset difference is the temperature difference between the refrigerant outlet water temperature and the ambient temperature. When the difference between the refrigerant outlet water temperature and the ambient temperature is less than the first preset difference, and after a certain period of time, the system determines that the surface of the heat exchanger may begin to frost and needs to start the defrosting program. The first preset difference reflects the sensitivity of defrosting start, and a smaller difference means that the system is more sensitive to temperature changes.

[0048] The first preset duration is the time period during which the above conditions (i.e. the ambient temperature is lower than the first preset temperature threshold, and the difference between the refrigerant outlet water temperature and the ambient temperature is less than the first preset difference) need to be continuously monitored after the above conditions are met. The first preset duration is set to avoid false defrosting program start due to short-term temperature fluctuations, and is usually set to between a few minutes and half an hour, which is not limited here.

[0049] Through this step, when the system monitors that the ambient temperature is lower than the pre-set first preset temperature threshold, the multi-way valve of the system is in the pre-set working mode, and the difference between the refrigerant outlet water temperature and the ambient temperature is less than the first preset difference, and the above conditions have lasted for more than or equal to the first preset duration, the system will determine that there is a risk of frost on the surface of the heat exchanger, and then automatically control the heat management system to enter the defrosting mode, thereby ensuring that the start of the defrosting program is carried out under a series of strict conditions, aiming to avoid unnecessary defrosting operation, reduce energy waste, while ensuring that the frost layer is quickly and effectively removed when needed, and ensuring the normal operation of the heat management system.

[0050] As can be seen, step S141 ensures the timely start of the defrosting program through intelligent judgment and precise control, not only improving the defrosting efficiency and reducing energy consumption, but also enhancing the protection of system components and improving the driving comfort.

[0051] Optionally, in step S14, in response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the pre-set defrosting start condition, controlling the heat management system to enter the defrosting mode includes the following execution steps: Step S142, in response to the comparison result indicating that the ambient temperature is less than the second preset temperature threshold, the multi-way valve working mode is the pre-set mode, and the difference between the ambient temperature and the refrigerant outlet water temperature is greater than the second preset difference and the duration is greater than or equal to the second preset duration, controlling the heat management system to enter the defrosting mode.

[0052] wherein the second preset temperature threshold is lower than the first preset temperature threshold, the second preset difference is larger than the first preset difference, and the second preset duration is shorter than the first preset duration.

[0053] In the embodiment, the second preset temperature threshold is a lower temperature value relative to the first preset temperature threshold, which is used to trigger the defrosting mode to cope with more severe cold environmental conditions. When the ambient temperature drops below the second preset temperature threshold, the system will consider that the heat exchanger surface is extremely likely to form a frost layer quickly, and a more urgent and efficient response is needed than in normal cases. For example, the first preset temperature threshold can be 0℃, and the second preset temperature threshold can be set to -5℃ or lower, which is not limited here.

[0054] The second preset difference is a larger value than the first preset difference, which is used to start the defrosting program even if the difference between the refrigerant outlet water temperature and the ambient temperature is large in the case of extremely low ambient temperature. Because in extremely cold conditions, a large temperature difference can indicate that the frost layer on the surface of the heat exchanger has accumulated to a degree that must be removed. For example, if the first preset difference is 5℃, the second preset difference can be set to 7℃ or higher, which is not limited here.

[0055] The second preset duration is a shorter value than the first preset duration, although the second preset duration is shorter, but this parameter ensures that even in very short time, the extremely cold conditions and large temperature difference appear, the defrosting mode can be started immediately, so as to avoid the frost layer rapidly accumulates in the extremely weather, resulting in a sharp decline in heat exchange efficiency, affecting the performance and safety of the vehicle. For example, when the ambient temperature is extremely low, even if the above extreme state only appears for a short time, the system needs to take measures quickly, which is not limited here.

[0056] Through this step, when the ambient temperature is lower than the second preset temperature threshold, and the threshold is lower than the first preset temperature threshold, it indicates that the system is in extremely cold conditions. At the same time, the multi-way valve is in the preset mode, indicating that the system is ready for defrosting. In addition, if the difference between the ambient temperature and the refrigerant outlet water temperature is greater than the second preset difference (larger than the first preset difference) at this time, and the above state has lasted for at least the second preset duration (shorter than the first preset duration), the system will immediately control the thermal management system to enter the defrosting mode, thereby ensuring that the defrosting program of the thermal management system can be started quickly and efficiently in extremely cold conditions, effectively preventing the influence of the frost layer on the system performance, and improving the accuracy and energy utilization efficiency of the defrosting operation.

[0057] It can be understood that the preset mode of the multi-way valve in step S142 can be Figure 5 、 Figure 6 、Figure 7 and Figure 8 any of the modes shown in any of

[0058] It can be seen that in extremely cold conditions, the frosting of the heat exchanger surface can be more rapid and severe, and thus the system needs to initiate the defrosting program more quickly under lower temperature thresholds and greater temperature difference conditions to prevent the frost layer from having a serious impact on the heat exchange efficiency. The shortening of the second preset duration ensures that the system can respond quickly, even if the temperature conditions only briefly meet the defrosting start conditions, so that timely action can be taken to avoid frost accumulation problems due to delayed response.

[0059] Optionally, the defrosting control method further comprises the following execution steps:

[0060] Step S16, in response to the refrigeration fan being turned off and the water inlet temperature of the electric drive system being greater than a third preset temperature threshold and the duration being greater than a third preset duration, the thermal management system is controlled to exit the defrosting mode.

[0061] In the embodiments of the present application, the water inlet temperature of the electric drive system refers to the temperature of the cooling liquid or refrigerant before it enters the electric drive system (such as the motor, inverter, etc.). The electric drive system generates heat during operation, and this part of the heat can be taken away by the cooling liquid or refrigerant circulation to keep the working temperature of the electric drive system within a safe range. When the water inlet temperature is high, it indicates that the heat generated by the electric drive system itself is sufficient to offset or reduce the need for defrosting, and the system can consider exiting the defrosting mode.

[0062] The third preset temperature threshold is a temperature value higher than the defrosting start condition, which is used to monitor the water inlet temperature of the electric drive system to determine whether the temperature is high enough to naturally eliminate the frost layer or no longer needs additional defrosting operation. For example, if the ambient temperature threshold in the defrosting start condition is close to the freezing point, the third preset temperature threshold can be set between 5°C and 10°C, and the specific value depends on factors such as the heat demand of the electric drive system and the defrosting efficiency, which is not limited here.

[0063] The third preset duration specifies the minimum duration that the water inlet temperature of the electric drive system needs to be higher than the third preset temperature threshold to confirm that the high temperature state of the electric drive system is stable and not a temporary temperature fluctuation. The third preset duration is usually longer than the duration in the defrosting start condition, because the system needs to ensure that the water inlet temperature is indeed stable at a higher level, so that it can safely exit the defrosting mode and avoid the reformation of the frost layer due to premature exit.

[0064] By this step, when the system detects that the refrigeration fan has been turned off, indicating that the heat exchange demand between the inside and outside of the vehicle has decreased, the electric drive system is sufficient to maintain the temperature of the surface of the heat exchanger above the frost point by the heat generated by itself, or at least can naturally defrost by the heat inside the electric drive system. At this time, if the electric drive system inlet water temperature (i.e. the temperature of the cooling liquid or refrigerant flowing through the electric drive system to cool its internal components) exceeds the third preset temperature threshold, and this high temperature state has lasted for at least a third preset duration, the system will determine that the defrosting process is no longer necessary, and thus will control the thermal management system to exit the defrosting mode and turn to a more energy-saving operating state.

[0065] It can be understood that the mode of the multi-way valve in step S16 can be any of the modes shown in any of Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 .

[0066] It can be seen that step S16 realizes the timely exit of the defrosting mode by monitoring the change of the electric drive system inlet water temperature, which not only helps to save energy and reduce the thermal load of the electric drive system, but also improves the overall stability and life of the system, and embodies the advantages of efficient and intelligent control of the intelligent thermal management system.

[0067] Optionally, the defrosting control method further comprises the following execution steps: Step S17, obtaining a vehicle state parameter;

[0068] Step S18, in response to the vehicle state parameter indicating that a lock vehicle signal is detected, the cabin air conditioner is turned off, and the battery requests to be turned off, controlling the thermal management system to enter a lock vehicle defrosting mode.

[0069] In the embodiment of the application, the vehicle state parameter is a series of information reflecting the current running state of the vehicle, including but not limited to the state of the vehicle door, the state of the air conditioning system, the state of the battery management system, etc.

[0070] The lock vehicle signal is used to indicate that the vehicle is in an unattended state and may not be used for a long time. When the driver or user locks the vehicle through the key, remote control or intelligent device (such as a smart phone application), the central control system of the vehicle will send a lock vehicle signal.

[0071] The cabin air conditioner turned off can be understood as the air conditioning system (including heating or cooling function) inside the vehicle is currently in the off state, i.e. the vehicle interior no longer needs active temperature adjustment.

[0072] The battery request to close can be understood as when the battery reaches a preset safe or ideal state, and no longer needs to be charged or discharged, the battery management system will send a request to close signal, indicating that the battery no longer needs additional thermal management.

[0073] The lock defrosting mode is mainly started when the vehicle is locked and will not be used for a short time, and the purpose is to prevent or remove the frost layer that may accumulate during the vehicle parking period. In the lock defrosting mode, the thermal management system will run independently according to the preset strategy, and will not be affected by other operations of the vehicle (such as driving, passenger request, etc.), and will focus on the defrosting task to ensure that the heat exchanger and other key components are in a frost-free state before the next use of the vehicle, and to ensure the performance and safety of the vehicle.

[0074] The acquisition of the vehicle state parameter can be understood as that the system monitors and collects data reflecting the current state of the vehicle in real time, which includes but is not limited to whether the vehicle is locked (lock signal), whether the passenger cabin air conditioning system is closed, and whether the battery management system requests to stop energy exchange (i.e. battery request to close, etc.). The above parameters are obtained through the communication network of the vehicle, and the status of each subsystem (such as the central control system, the air conditioning system, and the battery management system) is reported to the defrosting control system, thereby providing a basis for subsequent decision-making.

[0075] In response to the vehicle state parameter indicating that the lock signal is detected, the passenger cabin air conditioner is turned off, and the battery request to close, the control of the thermal management system into the lock defrosting mode can be understood as when the defrosting control system detects that the vehicle has been locked, the passenger cabin air conditioning system is turned off, and the battery management system requests to close the energy exchange, it indicates that the vehicle will be parked for a long time, and there is no longer an active temperature regulation demand inside the vehicle, and the external environment temperature may be low, and there is a risk of frost formation on the heat exchanger. In this case, the system will automatically switch to the lock defrosting mode.

[0076] As can be seen, through the above steps, first, the vehicle state parameter is acquired, and when the system determines that the vehicle is in a parked state and faces a frost risk according to the vehicle state parameter, the lock defrosting mode is automatically entered, thereby meeting the special needs during the vehicle parking period, especially during the night or long parking in cold areas. Through intelligent system judgment, defrosting is performed in advance when the vehicle is not in use, ensuring vehicle performance and driving safety, and optimizing energy management and user experience.

[0077] Optionally, the defrosting control method further comprises the following execution steps:

[0078] Step S19, in response to the vehicle state parameter indicating that the duration of the parked state or the duration of the charging gun insertion is greater than the fourth preset duration, the passenger cabin air conditioner is turned off, and the battery request to close, the control of the thermal management system into the parked defrosting mode.

[0079] In the embodiment of the present application, the duration of the parking state refers to the duration of the vehicle being in a stationary and undriven state, that is, the length of time after the vehicle is parked by the driver. In the parking defrosting mechanism, the system continuously monitors the parking time of the vehicle to determine whether to start the defrosting program.

[0080] For an electric vehicle or a hybrid vehicle, when the charging gun is inserted into the charging interface of the vehicle, the charging system of the vehicle is activated. The charging gun insertion duration refers to the length of time from the insertion of the charging gun to the current time. In the present application, this parameter is used to determine whether the vehicle is in a charging state for a long time.

[0081] The fourth preset duration is the minimum duration of the vehicle being in a parking state or a charging gun insertion state, which is used to ensure that the system does not start defrosting when the vehicle is parked for a short time or charged for a short time, preventing resource waste.

[0082] The parking defrosting mode is a defrosting control mode that is automatically started during long-term parking of the vehicle. The parking defrosting mode is started when the vehicle is not in use and the ambient temperature may cause frost formation, to keep the surface of the vehicle heat exchanger free of frost. That is, the parking defrosting mode is not only activated when the vehicle is locked, but also considers the case where the vehicle is in a charging state for a long time, because even when charging, the vehicle may be in a low-temperature environment.

[0083] Through this step, when the system monitors that the vehicle state parameter satisfies the duration of the parking state or the charging gun insertion duration exceeds the fourth preset duration, it indicates that the vehicle may have been parked or charged for a long enough time, and the outside environment temperature has the opportunity to drop below the frost point, thereby possibly causing frost to accumulate on the surface of the heat exchanger. And the vehicle state parameter also satisfies that the cabin air conditioning system has been turned off, indicating that the vehicle interior is no longer actively temperature-regulated, reducing the dependence on the thermal management system, and the vehicle state parameter also satisfies that the battery management system requests to be turned off, that is, the battery is no longer charging or discharging, and is in an energy exchange pause state. When the vehicle state parameter satisfies the above conditions, the system will determine that the current environment and vehicle state are suitable for starting the defrosting program to prevent or remove the frost that may have accumulated during the stationary period of the vehicle.

[0084] As can be seen, by monitoring that the duration of the parking state and the charging gun insertion duration are greater than the fourth preset duration, the parking defrosting mode can ensure that the vehicle can effectively prevent or remove frost in a long-term parking or long-term charging state, ensuring the performance of the thermal management system and improving energy utilization efficiency and user experience.

[0085] According to the embodiment of the present application, an embodiment of a defrosting control device is provided. It should be noted that the device can be used to execute the above defrosting control method.

[0086] Figure 9 is a block diagram of a defrosting control system according to an embodiment of the present application, as Figure 9 As shown in the figure, the defrosting control system 900 comprises: an acquisition module 901 configured to acquire an ambient temperature and a multi-way valve working mode; a comparison module 902 configured to compare the ambient temperature and the multi-way valve working mode with preset defrosting starting conditions to obtain a comparison result; and a control module 903 configured to control a thermal management system to enter a defrosting mode in response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting starting conditions.

[0087] Further, the control module 903 is further configured to control the thermal management system to enter the defrosting mode in response to the comparison result indicating that the ambient temperature is less than a first preset temperature threshold, the multi-way valve working mode is a preset mode, and a difference between a refrigerant outlet water temperature and the ambient temperature is less than a first preset difference and a duration is greater than or equal to a first preset duration.

[0088] Further, the control module 903 is further configured to control the thermal management system to enter the defrosting mode in response to the comparison result indicating that the ambient temperature is less than a second preset temperature threshold, the multi-way valve working mode is the preset mode, and a difference between the ambient temperature and the refrigerant outlet water temperature is greater than a second preset difference and a duration is greater than or equal to a second preset duration; wherein the second preset temperature threshold is less than the first preset temperature threshold, the second preset difference is greater than the first preset difference, and the second preset duration is less than the first preset duration.

[0089] Further, the control module 903 is further configured to control the thermal management system to exit the defrosting mode in response to a refrigeration fan being off, an electric drive system inlet water temperature being greater than a third preset temperature threshold and a duration being greater than a third preset duration.

[0090] Further, the control module 903 is further configured to acquire a vehicle state parameter; and control the thermal management system to enter a lock defrosting mode in response to the vehicle state parameter indicating that a lock signal is detected, a passenger cabin air conditioner is off, and a battery requests to be off.

[0091] Further, the control module 903 is further configured to control the thermal management system to enter a parking defrosting mode in response to the vehicle state parameter indicating that a parking state duration or a charging gun insertion duration is greater than a fourth preset duration, the passenger cabin air conditioner is off, and the battery requests to be off.

[0092] According to another aspect of the embodiments of the present application, a vehicle is also provided, comprising: a memory storing an executable program; and a processor configured to run the program, wherein the program, when running, performs the method of any one of the above.

[0093] Optionally, in the present embodiment, the processor in the vehicle can be configured to run a computer program to perform the following steps: Step S10, obtaining the ambient temperature and the working mode of the multi-way valve; Step S12, comparing the ambient temperature and the working mode of the multi-way valve with preset defrosting starting conditions to obtain a comparison result;

[0094] Step S14, in response to the comparison result indicating that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting conditions, controlling the thermal management system to enter the defrosting mode.

[0095] According to another aspect of the embodiments of the present application, an electronic device is also provided, which includes a memory storing an executable program, and a processor configured to execute the program, wherein the program, when executed, implements any of the above methods.

[0096] Optionally, in the present embodiment, the processor in the electronic device can be configured to execute the computer program to perform the following steps: Step S10, obtaining the ambient temperature and the working mode of the multi-way valve; Step S12, comparing the ambient temperature and the working mode of the multi-way valve with preset defrosting starting conditions to obtain a comparison result;

[0097] Step S14, in response to the comparison result indicating that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting conditions, controlling the thermal management system to enter the defrosting mode.

[0098] According to another aspect of the embodiments of the present application, a computer readable storage medium is also provided, which includes a stored executable program, wherein the executable program, when executed, controls the device where the computer readable storage medium is located to implement any of the above methods.

[0099] Optionally, in the present embodiment, the computer readable storage medium can be configured to store a computer program for performing the following steps: Step S10, obtaining the ambient temperature and the working mode of the multi-way valve; Step S12, comparing the ambient temperature and the working mode of the multi-way valve with preset defrosting starting conditions to obtain a comparison result;

[0100] Step S14, in response to the comparison result indicating that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting conditions, controlling the thermal management system to enter the defrosting mode.

[0101] According to another aspect of the embodiments of the present application, a computer program product is also provided, which includes a computer program, and the computer program, when executed by a processor, implements any of the above methods.

[0102] Optionally, in the present embodiment, the computer program in the computer program product, when executed by the processor, can be configured to perform the following steps: Step S10, obtaining the ambient temperature and the working mode of the multi-way valve; Step S12, comparing the ambient temperature and the working mode of the multi-way valve with preset defrosting starting conditions to obtain a comparison result;

[0103] Step S14, in response to the comparison result indicating that the ambient temperature and the working mode of the multi-way valve meet the preset defrosting starting conditions, controlling the thermal management system to enter the defrosting mode.

[0104] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0105] In the several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the embodiment described above is only illustrative, and the division of units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, units or modules, which can be electrical or other forms.

[0106] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0107] In addition, each functional unit in each embodiment of the present application can be integrated in a processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0108] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0109] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A defrosting control method characterized by, The method comprises: obtaining an ambient temperature and a multi-way valve working mode; comparing the ambient temperature and the multi-way valve working mode with preset defrosting starting conditions to obtain a comparison result; in response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting starting conditions, controlling a thermal management system to enter a defrosting mode.

2. The defrosting control method according to claim 1, characterized by, The response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting starting conditions, controlling a thermal management system to enter a defrosting mode comprises: in response to the comparison result indicating that the ambient temperature is less than a first preset temperature threshold, the multi-way valve working mode is a preset mode, and a difference between a refrigerant outlet water temperature and the ambient temperature is less than a first preset difference and a duration is greater than or equal to a first preset duration, controlling the thermal management system to enter the defrosting mode.

3. The defrosting control method according to claim 2, characterized by, The response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting starting conditions, controlling a thermal management system to enter a defrosting mode comprises: in response to the comparison result indicating that the ambient temperature is less than a second preset temperature threshold, the multi-way valve working mode is a preset mode, and a difference between the ambient temperature and a refrigerant outlet water temperature is greater than a second preset difference and a duration is greater than or equal to a second preset duration, controlling the thermal management system to enter the defrosting mode; wherein the second preset temperature threshold is less than the first preset temperature threshold, the second preset difference is greater than the first preset difference, and the second preset duration is less than the first preset duration.

4. The defrosting control method according to claim 1, characterized by, Further comprising: in response to a refrigeration fan being off and an electric drive system outlet water temperature being greater than a third preset temperature threshold and a duration being greater than a third preset duration, controlling the thermal management system to exit the defrosting mode.

5. The defrosting control method according to claim 1, wherein Further comprising: obtaining a vehicle state parameter; in response to the vehicle state parameter indicating that a lock vehicle signal is detected, a passenger cabin air conditioner is off, and a battery requests to be off, controlling the thermal management system to enter a lock vehicle defrosting mode.

6. The defrosting control method according to claim 5, wherein Further comprising: in response to the vehicle state parameter indicating that a parking state duration or a charging gun insertion duration is greater than a fourth preset duration, a passenger cabin air conditioner is off, and a battery requests to be off, controlling the thermal management system to enter a parking defrosting mode.

7. A defrosting control system, characterized by, The method comprises: an obtaining module configured to obtain an ambient temperature and a multi-way valve working mode; a comparison module configured to compare the ambient temperature and the multi-way valve working mode with preset defrosting starting conditions to obtain a comparison result; a control module configured to, in response to the comparison result indicating that the ambient temperature and the multi-way valve working mode meet the preset defrosting starting conditions, control a thermal management system to enter a defrosting mode.

8. A vehicle characterized by comprising: The method comprises: a memory storing an executable program; a processor configured to run the program, wherein the program, when executed, performs the method of any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises a stored executable program, wherein the executable program, when executed, controls a device in which the storage medium is located to perform the method of any one of claims 1 to 6.

10. A computer program product, characterised in that, The computer program, when executed by a processor, implements the method of any one of claims 1 to 6.

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