Mode switching method and device of vehicle air conditioner and vehicle

Abstract

The invention provides a mode switching method and device for a vehicle air conditioner and a vehicle, and relates to the field of vehicles, and the method comprises the steps that a demand mode is determined by integrating the environment temperature, the battery demand and the passenger compartment demand, so that demand mode misjudgment caused by a single demand is avoided; and the transition mode is determined by further combining the transition mode judgment condition, and then the heat pump air-conditioning system is controlled to perform mode switching according to the current mode, the transition mode and the demand mode, so that the problem of mode switching disorder can be effectively solved, the rationality and accuracy of mode switching can be improved, and the operation stability of the heat pump air-conditioning system can be guaranteed. And moreover, the energy utilization efficiency is optimized, extra energy consumption caused by invalid switching is avoided, and the service life of parts is prolonged.

Description

Technical Field

[0001] This application relates to the field of vehicles, and particularly to a method and device for switching modes of a vehicle air conditioner and a vehicle. Background Art

[0002] In the current era of continuous innovation in automotive technology, the heat pump air conditioning system of a vehicle, as a core component for regulating the in-vehicle environment, undertakes extremely crucial tasks. The heat pump air conditioning system of a vehicle needs to continuously change modes according to requirements to respond to different demands. Accurate and timely mode switching not only concerns the comfort experience of in-vehicle passengers and drivers, but also is a key link in the efficient utilization of vehicle energy.

[0003] In related technologies, when the heat pump air conditioning system of a vehicle switches modes, there may be situations of chaotic mode switching and switching errors, which affect the stability of the operation of the heat pump air conditioning system and the user experience, and even affect the service life of the power battery and driving safety. Summary of the Invention

[0004] Embodiments of this application provide a method and device for switching modes of a vehicle air conditioner and a vehicle to solve the problem of chaotic mode switching of the vehicle air conditioner and achieve stable and accurate switching of the air conditioning mode.

[0005] In a first aspect, embodiments of this application provide a method for switching modes of a vehicle air conditioner, including:

[0006] Obtaining a required mode for the heat pump air conditioning system of the vehicle according to the ambient temperature of the vehicle, the battery requirements of the vehicle, and the requirements of the occupant compartment;

[0007] Determining a transition mode based on the required mode, the current mode of the heat pump air conditioning system, and a preset transition mode determination condition;

[0008] Controlling the heat pump air conditioning system to switch modes according to the current mode, the transition mode, and the required mode.

[0009] In this embodiment, by comprehensively determining the required mode based on the ambient temperature, battery requirements, occupant compartment requirements, and dehumidification requirements, the actual requirements of the vehicle can be accurately defined, avoiding misjudgment of the required mode caused by a single requirement; and further combining the transition mode determination condition, effectively solving chaotic mode switching, improving the rationality and accuracy of mode switching, and thus ensuring the stability of the operation of the heat pump air conditioning system. And optimizing the energy utilization efficiency, avoiding additional energy consumption caused by ineffective switching, and extending the service life of components.

[0010] In a possible implementation, the transition mode determination condition includes multiple conditions, and the multiple conditions are respectively set according to at least one of the compressor speed, the vehicle dehumidification requirement, the vehicle fault information, and the vehicle state information, and different conditions have different judgment priorities;

[0011] Determining a transition mode based on the demand mode, the current mode of the heat pump air conditioning system, and a preset transition mode determination condition includes:

[0012] Based on the demand mode, the current mode, and the judgment priorities of multiple conditions in the transition mode determination condition, perform a transition mode judgment to obtain a judgment result;

[0013] Determine the transition mode according to the judgment result.

[0014] In this embodiment, in combination with transition mode determination conditions such as the compressor speed, the vehicle dehumidification demand, the vehicle fault information, and the vehicle state information, through multi-parameter fusion and state constraint verification, it not only clarifies the necessity of mode switching from the demand side, but also can verify the feasibility of switching from the system side, avoid overloading and fault risks, etc., and further assigns different priorities to different transition mode determination conditions to construct a hierarchical decision-making mechanism. By preferentially processing key factors with high priorities, it avoids the interference of low-priority conditions on the switching decision, ensures that the system can quickly respond to core demands under complex working conditions, can solve the decision-making ambiguity problem in multi-condition conflict scenarios, can significantly reduce the misjudgment probability, effectively avoid switching errors, improve the decision-making efficiency and safety of the vehicle heat pump air conditioning system, and ensure the coordinated operation of the heat pump air conditioning system and the vehicle safety.

[0015] In a possible implementation manner, the transition mode determination condition includes whether the compressor speed in the current mode is greater than a preset speed threshold, whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state;

[0016] Among them, the judgment priorities of whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state are higher than the judgment priority of whether the compressor speed in the current mode is greater than a preset speed threshold;

[0017] The performing a transition mode judgment based on the demand mode, the current mode, and the judgment priorities of multiple conditions in the transition mode determination condition to obtain a judgment result includes:

[0018] Judge whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state to obtain a first judgment result;

[0019] If the first judgment result is that the vehicle has no dehumidification requirement in the current mode, the vehicle has no corresponding fault in the required mode, and the vehicle state in the current mode is not the preset special state, then determine whether the compressor speed in the current mode is greater than the preset speed threshold, obtain the second judgment result, and use the second judgment result as the final judgment result.

[0020] This embodiment clarifies that the judgment of dehumidification requirement, fault, and special state takes precedence over the compressor speed. When there are emergency requirements in the vehicle heat pump air conditioning system, such as faults and special states, protective decisions can be triggered immediately, avoiding ineffective or dangerous switching caused by blindly judging the compressor speed, ensuring the safety margin of the vehicle heat pump air conditioning system under abnormal conditions, and reducing the impact on the power battery and driving safety.

[0021] In a possible implementation manner, the determining the transition mode according to the judgment result includes:

[0022] If the second judgment result is that the compressor speed in the current mode is greater than the preset speed threshold, then determine the transition mode as the combination of the current mode and the required mode.

[0023] In this embodiment, when the compressor speed is higher than the threshold, the combination of the current mode and the required mode is used as the transition mode, which can avoid energy impact or sudden change of component load caused by sudden change of speed, realize smooth transition of the mode switching process, and improve the operation stability and component life of the vehicle heat pump air conditioning system.

[0024] In a possible implementation manner, after judging whether the vehicle has a dehumidification requirement in the current mode, whether the vehicle has a corresponding fault in the required mode, and whether the vehicle state in the current mode is the preset special state, and obtaining the first judgment result, it further includes:

[0025] If the first judgment result is that the vehicle has a dehumidification requirement in the current mode, the vehicle has a corresponding fault in the required mode, or the vehicle state in the current mode is the preset special state, then stop the judgment and use the first judgment result as the final judgment result.

[0026] In this embodiment, when the high-priority conditions including dehumidification requirement, fault, and special state are met, the subsequent judgment is stopped, and the first judgment result is directly used as the decision basis, which can quickly respond to emergency conditions, avoid response delay caused by redundant judgment, ensure that the vehicle heat pump air conditioning system takes protective measures in a timely manner under critical conditions, and reduce safety risks.

[0027] In a possible implementation manner, the determining the transition mode according to the judgment result includes:

[0028] If the first judgment result is that the vehicle has a dehumidification requirement in the current mode, then determine the transition mode as the current mode;

[0029] If the first judgment result is that the vehicle has a corresponding fault in the demand mode, determine that the transition mode is the mode without the corresponding fault in the demand mode or the no-operation mode;

[0030] If the first judgment result is that the vehicle state in the current mode is a preset special state, determine that the transition mode is the no-operation mode; wherein, the preset special state includes at least one of vacuum pumping of the heat pump air-conditioning system, triggering of vehicle coolant filling, vehicle power-off, incomplete initialization of the electronic expansion valve, and vehicle high voltage being lower than a preset high voltage threshold.

[0031] In this embodiment, specific transition modes are set for different high-priority conditions, enabling refined processing of fault scenarios: maintaining the current mode during dehumidification demand to avoid affecting the dehumidification effect; switching to a mode without faults or no operation during a fault to prevent the expansion of the fault; stopping operations during a special state to avoid hardware damage caused by forced switching when the vehicle is not ready, thus enhancing the fault tolerance of the vehicle.

[0032] In a possible implementation, the occupant compartment demand includes occupant demand and vehicle dehumidification demand;

[0033] The obtaining of the demand mode for the vehicle heat pump air-conditioning system according to the vehicle ambient temperature, vehicle battery demand, and occupant compartment demand includes:

[0034] Determine the temperature range corresponding to the vehicle ambient temperature according to a preset temperature range;

[0035] Obtain a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between different temperature ranges, different vehicle battery demands, different occupant demands, and different vehicle dehumidification demand combinations and the demand mode of the vehicle heat pump air-conditioning system;

[0036] Based on the preset mapping relationship, and the temperature range corresponding to the vehicle ambient temperature, vehicle battery demand, occupant demand, and vehicle dehumidification demand, obtain the demand mode for the vehicle heat pump air-conditioning system.

[0037] In this embodiment, by establishing a mapping relationship between the preset temperature range and the demand, a standardized demand judgment logic is established, avoiding misjudgment of the mode caused by manual or fuzzy judgment, ensuring the accuracy of the demand mode from the source, and providing a reliable input basis for subsequent switching decisions.

[0038] In a possible implementation, the controlling of the heat pump air-conditioning system to perform mode switching according to the current mode, the transition mode, and the demand mode includes:

[0039] If the current mode, the transition mode, and the demand mode are all different, and there are no corresponding faults in the vehicle in the demand mode, then control the heat pump air conditioning system to switch from the current mode to the transition mode, and then control the heat pump air conditioning system to switch from the transition mode to the demand mode;

[0040] If the current mode, the transition mode, and the demand mode are all different, and there are some faults in the vehicle in the demand mode, then control the heat pump air conditioning system to switch from the current mode to the mode without corresponding faults in the demand mode;

[0041] If the current mode is the same as the transition mode, then control the heat pump air conditioning system not to perform mode switching;

[0042] If the transition mode is the no-operation mode, then control the heat pump air conditioning system to stop working.

[0043] In this embodiment, according to the relationship between the current mode, the transition mode, and the demand mode and the fault status, the switching process is controlled in different scenarios: when there is no fault, through the phased switching of "current - transition - demand", the impact of direct switching is avoided, and the switching smoothness is improved; when there is a fault, switch to the fault-free mode to ensure basic functions and avoid risks; when there is no operation or the modes are the same, stop switching to prevent component fatigue caused by frequent switching, comprehensively cover the switching logic under different working conditions, and improve the system stability and user experience.

[0044] In a second aspect, an embodiment of the present application provides a mode switching device for a vehicle air conditioner, and the device includes:

[0045] A first processing unit, configured to obtain a demand mode for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery demand, and the occupant compartment demand;

[0046] A second processing unit, configured to determine a transition mode based on the demand mode, the current mode of the heat pump air conditioning system, and a preset transition mode judgment condition;

[0047] A switching unit, configured to control the heat pump air conditioning system to perform mode switching according to the current mode, the transition mode, and the demand mode.

[0048] In a third aspect, an embodiment of the present application provides a vehicle, and the vehicle includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the method in the first aspect or any possible implementation manner of the first aspect is implemented.

[0049] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. Description of the Drawings

[0050] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0051] Figure 1 is a schematic flowchart of a method for switching modes of a vehicle air conditioner provided by an embodiment of the present application;

[0052] Figure 2 is a schematic flowchart of another method for switching modes of a vehicle air conditioner provided by an embodiment of the present application;

[0053] Figure 3 is a schematic structural diagram of a device for switching modes of a vehicle air conditioner provided by an embodiment of the present application;

[0054] Figure 4 is a schematic structural diagram of a vehicle provided by an embodiment of the present application. Detailed implementation manners

[0055] The following further clarifies the present application in combination with specific embodiments. The following embodiments will help those skilled in the art to further understand the function of the present application, but do not limit the present application in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can also be made. These all belong to the protection scope of the present application.

[0056] It should be understood that when used in the specification of the present application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0057] It should also be understood that the term "and / or" used in the specification of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0058] In the description of the specification of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0059] References to "one embodiment" or "some embodiments" in the description of the present application mean that specific features, structures, or characteristics described in connection with that embodiment are included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having", and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0060] In addition, the "plurality" mentioned in the embodiments of the present application should be construed as two or more.

[0061] In the related art, the refrigerant side of a heat pump air conditioning system usually involves more than 8 operating modes (such as refrigeration, heating, defrosting, battery preheating, waste heat recovery, etc.). It is necessary to perform precise mode switching according to different vehicle demand scenarios. Especially for pure electric / hybrid vehicles, the vehicle operation scenarios are complex and changeable, resulting in the heat pump air conditioning system needing to continuously adjust the operating mode dynamically according to the demand. Problems such as chaotic switching logic and execution deviation are likely to occur, which not only reduces the user experience, but may also pose a threat to the service life of the power battery and driving safety due to the risk of battery thermal runaway or unbalanced energy distribution.

[0062] For the purpose of solving the problem of chaotic mode switching of vehicle air conditioners and achieving stable and accurate switching of air conditioner modes, this embodiment determines the demand mode by comprehensively considering the ambient temperature, battery demand, and occupant compartment demand, and combines the transition mode judgment conditions to comprehensively and accurately evaluate the necessity and feasibility of mode switching, avoiding switching chaos caused by a single condition, improving the rationality and accuracy of mode switching, and thus ensuring the stability of the operation of the heat pump air conditioning system.

[0063] Reference Figure 1 , Figure 1 is a schematic flow chart of a method for switching modes of a vehicle air conditioner provided by the present application. As Figure 1 shown, the method in the embodiments of the present application may include:

[0064] Step 101, obtain the demand mode for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery demand, and the occupant compartment demand.

[0065] Exemplarily, since the ambient temperature directly affects the energy efficiency of the heat pump system, the battery demand involves the priority of energy distribution, and the occupant compartment demand is related to user comfort, this embodiment can accurately determine the demand mode by combining the three.

[0066] In a feasible implementation manner, this embodiment takes the ambient temperature, the battery thermal management requirement, and the occupant compartment comfort requirement as input variables, and converts them into the demand mode of the vehicle heat pump air conditioning system through a preset mapping relationship.

[0067] In another feasible implementation manner, this embodiment integrates the parameters of several dimensions of the ambient temperature where the vehicle is located, the vehicle battery requirement, and the occupant compartment requirement respectively as the input parameters of the model, and inputs them into the constructed demand analysis model to obtain the demand mode for the heat pump air conditioning system under the current working condition output by the model.

[0068] This embodiment can avoid misjudgment of the demand mode caused by a single parameter, provide a clear target orientation for subsequent switching decisions, ensure that the mode switching always serves the core requirements, and reduce the problems of ineffective switching or demand mismatch from the source.

[0069] Step 102, determine the transition mode based on the demand mode, the current mode of the heat pump air conditioning system, and the preset transition mode judgment conditions.

[0070] Exemplarily, this embodiment introduces a transition mode as an intermediate decision node between the demand mode and the current mode of the heat pump air conditioning system, evaluates the feasibility of mode switching through the preset transition mode judgment conditions, and determines a safe and efficient transition path.

[0071] Among them, the transition mode can be set according to the air conditioning system state parameters, the hardware reliability boundary, and the vehicle state parameters, etc., and is used to evaluate the feasibility and safety of switching between the demand mode and the current mode.

[0072] In an example, the transition mode judgment conditions are set according to at least one of the compressor speed, the vehicle dehumidification requirement, the vehicle fault information, and the vehicle state information. Among them, the compressor speed can reflect the current load of the system, avoiding component overload or excessive fluctuations caused by forced switching under high load; the fault information is used as a safety boundary to prevent chain failures caused by fault switching; the vehicle state ensures that the switching operation is only executed when the system is ready, avoiding control failures caused by uninitialized hardware.

[0073] This embodiment sets one or more transition mode judgment conditions according to one or more of the compressor speed, the vehicle dehumidification requirement, the vehicle fault information, and the vehicle state information. For example, the corresponding transition mode judgment condition set according to the compressor speed is: whether the compressor speed in the current mode is greater than the preset speed threshold; the corresponding transition mode judgment condition set according to the vehicle dehumidification requirement is: whether the vehicle has a dehumidification requirement in the current mode; the corresponding transition mode judgment condition set according to the vehicle fault information is: whether the vehicle has a corresponding fault in the demand mode; the corresponding transition mode judgment condition set according to the vehicle state information is: whether the vehicle state in the current mode is a preset special state, etc.

[0074] In this embodiment, the transition mode determination condition can be one or more of the above four types.

[0075] In one example, the transition mode determination condition includes whether there is a corresponding fault in the vehicle in the demand mode. If it is determined according to the transition mode determination condition that there is a fault in the demand mode or the current mode and its mode function cannot be realized, the demand mode can be functionally degraded according to the specific fault information to obtain the transition mode, so as to meet the demand as much as possible in the fault scenario. For example, when the demand mode is the dual refrigeration mode, if the blower voltage is abnormal or the blower fails, the single occupant compartment cooling mode cannot be realized. At this time, the dual refrigeration mode can be functionally degraded to obtain the single battery cooling as the transition mode. In the prior art, if it is recognized that there is a fault in the equipment or components required to be mobilized in the demand mode, the heat pump air conditioning system is controlled to stop working, or the mode is still switched. That is, when the demand mode is the dual refrigeration mode, if it is recognized that the blower voltage is abnormal or the blower fails, the heat pump air conditioning system is controlled to stop working.

[0076] In the prior art, if it is recognized that there is a fault in the equipment or components required to be mobilized in the demand mode, the essence of controlling the heat pump air conditioning system to stop working is to equate the fault with complete functional failure, ignoring that some components in the system may still be in normal working state. For example, when the blower fails, the battery cooling circuit may still be intact. This "one-size-fits-all" treatment method will lead to: functions not related to the fault are forced to be sacrificed, such as only the blower fails but all refrigeration demands are abandoned; potential risks are amplified, such as battery cooling failure may cause thermal runaway; it will also lead to a decline in user experience; when it is recognized that there is a fault in the equipment or components required to be mobilized in the demand mode, and the mode is still switched, the essence is the lack of effective control over the fault risk, which may cause the fault to expand further or trigger new safety hazards. For example, if the blower fails and the dual refrigeration mode is still forcibly switched, it may cause serious frosting of the evaporator due to insufficient air circulation, and even cause liquid slugging of the compressor. This treatment method will lead to: the scope of influence of the fault expands, even threatening driving safety.

[0077] In this embodiment, considering that the vehicle heat pump air conditioning system involves the coordination of multiple components such as compressors, blowers, electronic expansion valves, and sensors, its failures are often local rather than systematic. Therefore, through the logic of "fault identification - function disassembly - remaining resource reorganization", the un-failed hardware / software modules are utilized to the greatest extent, and the function is continued on the premise of ensuring safety. It can prevent the entire air conditioning system from being paralyzed due to the failure of a single component. For example, in an extremely high-temperature environment, even if the function of cooling the passenger compartment is limited, at least ensure the normal operation of the battery thermal management system, safeguard the vehicle's endurance and battery life, and enhance the user experience and system reliability. At the same time, the impact of the failure is limited to the smallest range. For example, when the blower fails, only the passenger compartment cooling function that depends on its operation is turned off, and key functions such as battery cooling are retained, improving the fault tolerance of the air conditioning system.

[0078] In another example, the transition mode determination condition includes whether the compressor speed in the current mode is greater than a preset speed threshold. If it is determined according to the transition mode determination condition that the compressor speed is greater than the preset speed threshold, at this time, to reduce the system fluctuations caused by mode switching, the dual mode composed of the current mode and the required mode can be used as the transition mode. For example, the current mode is the waste heat recovery heating mode, the required mode is the outdoor heat exchanger heating mode, and the transition mode is the outdoor heating + waste heat recovery mode.

[0079] In the prior art, shutdown switching is usually performed. For example, when the current mode is the waste heat recovery heating mode and the required mode is the outdoor heat exchanger heating mode, during mode switching, first control the air conditioning system to shut down, and then control the air conditioning system to switch to the outdoor heat exchanger heating mode. The essence of "shutdown switching" is to complete the mode conversion by "interrupting the current operation - reconstructing a new operating state", which will cause the following problems in the scenario of high compressor speed: (1) Pressure shock: The refrigerant flow suddenly stops at the moment of shutdown, and the pressure difference between the high and low pressure sides changes sharply in a short period. When restarting, it is necessary to re-establish the pressure balance, resulting in an extended mode switching time; (2) Component wear: Frequent start and stop of the compressor will exacerbate the bearing wear, and at the same time increase the risk of electromagnetic clutch failure. Moreover, the shutdown switching process may cause large fluctuations in the vehicle interior temperature, seriously affecting the passenger riding experience.

[0080] In this embodiment, considering that if the compressor speed is greater than the preset threshold, it indicates that the current air conditioning system is in a strong output state. At this time, if direct shutdown switching is performed, it is equivalent to an emergency braking operation. Instead, the transition mode between the current and required modes is judged through the preset transition mode determination condition, thereby providing a buffer mechanism for mode switching, ensuring that the switching operation is only executed in a safe and feasible state, reducing the impact on the vehicle and the heat pump air conditioning system during the switching process, avoiding violent oscillations in the system operating state, avoiding the switching risks caused by direct and blind switching, and improving the switching efficiency at the same time.

[0081] Step 103: Control the heat pump air conditioning system to perform mode switching according to the current mode, transition mode, and demand mode.

[0082] Exemplarily, based on the actual situations of the current mode, transition mode, and demand mode, for example, according to whether they are the same or different among the current mode, transition mode, and demand mode, adaptively determine whether to perform mode switching and determine the specific mode to be switched to.

[0083] In one example, if there is a large difference between the current mode and the demand mode, it can be switched in stages through the determined transition mode. For example, first switch from the current mode to the transition mode, and then from the transition mode to the demand mode, avoiding sudden parameter changes and system fluctuations caused by direct switching, and improving the switching efficiency.

[0084] In one example, the transition mode is obtained by partially degrading the functions of the demand mode. The current mode can be switched to this transition mode to meet the demand to the greatest extent, continue the functions on the premise of ensuring safety, and improve the riding experience of the occupants.

[0085] In this embodiment, the demand mode is determined by comprehensively considering the ambient temperature, battery demand, and occupant compartment demand, which can accurately define the actual demand of the vehicle, avoid misjudgment of the demand mode caused by a single demand; and further combined with the transition mode judgment conditions, it can effectively solve the chaos of mode switching, improve the rationality and accuracy of mode switching, and then ensure the stability of the operation of the heat pump air conditioning system. And optimize the energy utilization efficiency, avoid additional energy consumption caused by invalid switching, and extend the service life of components.

[0086] To avoid misjudgment of the mode caused by manual or fuzzy judgment, ensure the accuracy of the demand mode from the source, and provide a reliable input basis for subsequent mode switching decisions, this embodiment establishes a standardized demand judgment logic through the mapping relationship between the preset temperature range and the demand.

[0087] Reference Figure 2 , Figure 2 is a schematic flowchart of another method for switching the mode of a vehicle air conditioner provided by this application.

[0088] Step 201: Obtain the demand mode for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery demand, and the occupant compartment demand.

[0089] Among them, the occupant compartment demand includes occupant demand and vehicle dehumidification demand.

[0090] In one example, the vehicle battery demand is for refrigeration, heating, or no demand, the occupant demand is for refrigeration, heating, or ventilation, and the vehicle dehumidification demand is for having dehumidification demand or no dehumidification demand; Step 201 includes the following steps:

[0091] Determine the temperature range corresponding to the ambient temperature of the vehicle according to the preset temperature range.

[0092] Obtain the preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between different temperature ranges, different vehicle battery requirements, different occupant requirements, different vehicle dehumidification requirements combinations and the demand modes of the vehicle heat pump air conditioning system.

[0093] Based on the preset mapping relationship, as well as the temperature range corresponding to the ambient temperature of the vehicle, vehicle battery requirements, occupant requirements and vehicle dehumidification requirements, obtain the demand mode for the vehicle heat pump air conditioning system.

[0094] Exemplarily, in this embodiment, the ambient temperature is divided into different ranges, such as: below -10 degrees Celsius, -10 degrees Celsius to 0 degrees Celsius, 0 degrees Celsius to 5 degrees Celsius, 5 degrees Celsius to 15 degrees Celsius, 15 degrees Celsius to 25 degrees Celsius, above 25 degrees Celsius, etc.; the requirements of the battery are divided into refrigeration, heating and no requirement, wherein, refrigeration and heating can also be subdivided into different levels according to the battery temperature; the occupant requirements are defined as refrigeration, heating, ventilation, and the air conditioning controller determines the occupant requirements through sensor information such as inside the vehicle, ambient temperature, sunlight, etc. Then, based on the preset mapping relationship, the vehicle battery requirements, occupant requirements and vehicle dehumidification requirements are respectively mapped to obtain the demand mode for the vehicle heat pump air conditioning system.

[0095] In one example, Table 1 is a schematic table of an air conditioning mode provided by an embodiment of the present application. Refer to Table 1:

[0096] Table 1 Schematic Table of Vehicle Air Conditioning Modes

[0097]

[0098]

[0099] The numbers of different modes can be obtained from Table 1 for subsequent reference.

[0100] This embodiment exemplarily gives a mapping table between battery requirements, dehumidification requirements, occupant requirements and air conditioning modes when the ambient temperature is in the temperature range of -10 degrees Celsius to 5 degrees Celsius. When the ambient temperature is in different temperature ranges, the mapping table is different. Refer to Table 2. Table 2 is a vehicle air conditioning mode mapping table provided by an embodiment of the present application, as follows:

[0101] Table 2 Vehicle Air Conditioning Mode Mapping Table

[0102]

[0103]

[0104] In one example, as can be seen from Table 2, when the temperature range corresponding to the ambient temperature is from -10 degrees Celsius to 5 degrees Celsius, the vehicle battery demand is for cooling, the vehicle has a dehumidification demand, and the occupant demand is for cooling, the demand mode corresponds to the single battery cooling mode and the active defrosting mode.

[0105] In this embodiment, by presetting the mapping relationship between the temperature range and the demand, a standardized demand judgment logic is established, avoiding misjudgment of the mode caused by manual or fuzzy judgment, and ensuring the accuracy of the demand mode from the source, providing a reliable input basis for subsequent switching decisions.

[0106] To solve the problem of fuzzy decision-making in multi-condition conflict scenarios, this embodiment sets transition mode judgment conditions with different priorities, constructs a hierarchical decision-making mechanism, and avoids interference from low-priority conditions in the switching decision by preferentially processing key factors with high priorities.

[0107] Step 202: Based on the judgment priorities of multiple conditions among the demand mode, the current mode, and the transition mode judgment conditions, perform a transition mode judgment to obtain a judgment result.

[0108] Among them, the transition mode judgment conditions include multiple conditions, and the multiple conditions are respectively set according to at least one of the compressor speed, the vehicle dehumidification demand, the vehicle fault information, and the vehicle status information, and different conditions have different judgment priorities.

[0109] In one example, the multiple conditions are respectively set according to the compressor speed, the vehicle dehumidification demand, the vehicle fault information, and the vehicle status information; the transition mode judgment conditions include whether the compressor speed in the current mode is greater than a preset speed threshold, whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle status in the current mode is a preset special status. Among them, the judgment priorities of whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle status in the current mode is a preset special status are higher than the judgment priority of whether the compressor speed in the current mode is greater than the preset speed threshold; Step 202 may include the following steps:

[0110] Judge whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle status in the current mode is a preset special status to obtain a first judgment result.

[0111] Exemplarily, in this embodiment, the determination is first made based on the transition mode determination conditions with high judgment priority, and the core conditions directly affecting system safety and functional effectiveness are preferentially verified, including whether the dehumidification requirement is being executed, whether there is a fault risk in the demand mode, and whether the vehicle is in a non-ready state, so as to ensure a quick response under emergency or abnormal working conditions and avoid the interference of secondary parameters such as compressor speed on key decisions. Prevent potential safety hazards caused by improper order of condition processing.

[0112] If the first determination result is that the vehicle has no dehumidification requirement in the current mode, there is no corresponding fault in the demand mode, and the vehicle state in the current mode is not the preset special state, then determine whether the compressor speed in the current mode is greater than the preset speed threshold, obtain the second determination result, and use the second determination result as the final determination result.

[0113] Exemplarily, if none of the high-priority conditions are triggered, the determination of low-priority conditions is started. On the premise of ensuring "safety and normal function", further optimization determination is carried out based on system operation efficiency, system fluctuations, etc., to avoid ignoring potential risks to vehicle driving and heat pump air conditioning due to excessive attention to efficiency and fluctuation parameters, and achieve safety priority and efficiency optimization.

[0114] If the first determination result is that the vehicle has a dehumidification requirement in the current mode, there is a corresponding fault in the demand mode, or the vehicle state in the current mode is the preset special state, then stop the determination and use the first determination result as the final determination result.

[0115] Exemplarily, once it is detected that the high-priority conditions are met, such as switching modes during the execution of the dehumidification function may cause the effect to be interrupted, there are known faults in the components required for the demand mode, the vehicle is in a non-ready state such as power-off or initialization not completed, etc., then the subsequent determination process of low-priority conditions is terminated. This "short-circuit mechanism" can avoid redundant determination, ensure that the system quickly outputs protective decisions under critical working conditions, such as maintaining the current mode, switching to the safe mode, stopping operations, etc., significantly improve the decision-making efficiency under complex working conditions, reduce the risk of response lag caused by the delay of conditional combination determination, and ensure the stability and safety of the system in abnormal scenarios.

[0116] In this embodiment, when the high-priority conditions including dehumidification requirement, fault, and special state are met, the subsequent determination is stopped, and the first determination result is directly used as the decision-making basis, which can quickly respond to emergency working conditions, avoid response delay caused by redundant determination, ensure that the vehicle heat pump air conditioning system takes protective measures in a timely manner under critical conditions, and reduce safety risks.

[0117] The hierarchical judgment logic of this embodiment effectively solves the problem of decision-making ambiguity in multi-condition conflict scenarios. For example, when there is a dehumidification requirement and the compressor is running at a high speed simultaneously, the dehumidification function is prioritized rather than forcibly switching the mode. By adopting the strategy of "processing emergency / safety-related conditions first, and then processing efficiency / performance-related conditions", the switching errors caused by chaotic condition priorities are reduced, enabling the system to quickly focus on the key contradictions under complex working conditions, improving the decision-making efficiency and reliability, significantly reducing the misjudgment probability, and ensuring the coordinated operation of the heat pump air-conditioning system and the vehicle safety.

[0118] Step 203: Determine the transition mode according to the judgment result.

[0119] In a feasible implementation, step 203 includes the following steps:

[0120] If the second judgment result is that the compressor speed in the current mode is greater than the preset speed threshold, determine the transition mode as the combination of the current mode and the demand mode.

[0121] Exemplarily, in order to ensure that the compressor does not stop as much as possible during the mode switching process in this embodiment and prevent system fluctuations. When the high-priority conditions are not met, a mode transition switching scheme is adopted. For example, when it is necessary to switch from the waste heat recovery heat absorption heating mode to the ambient heat absorption heating mode currently, if the compressor speed is greater than the preset speed threshold, such as 500 revolutions per minute (rpm), switch to the ambient + waste heat recovery heating mode through the transition mode to prevent the compressor from stopping. After the transition mode is stable, switch to the demand mode again.

[0122] If the first judgment result is that the vehicle has a dehumidification requirement in the current mode, determine the transition mode as the current mode.

[0123] Exemplarily, if the vehicle has a dehumidification requirement in the current mode, that is, the current mode includes a dehumidification item, the current mode remains unchanged. That is, in the dehumidification mode, the mode remains unchanged and no mode switching is performed. For example, when the current mode is ① and the demand modes are ⑦, ⑤⑦, or ⑥⑦, the ① mode remains unchanged, that is, the transition mode is the current mode.

[0124] This embodiment takes into account that the mode switching process in the dehumidification mode will cause a sudden increase in the evaporator temperature, resulting in an increase in water vapor in the vehicle. And the condensation of water vapor on the front windshield will affect the driver's vision and driving safety. Therefore, this embodiment constructs a mode switching logic for forcibly locking the dehumidification mode, which can eliminate safety risks and at the same time meet the comfort requirements of the occupants for temperature and humidity.

[0125] This embodiment can also add other regulatory items of the vehicle air-conditioning mode as the transition judgment conditions with high judgment priorities to further ensure driving safety.

[0126] If the first judgment result is that the vehicle has a corresponding fault in the demand mode, determine that the transition mode is the mode without the corresponding fault in the demand mode or the no-operation mode.

[0127] Exemplarily, if the demand mode is a dual mode, but there are abnormalities on one or both sides of the dual mode and it is necessary to switch to another mode, that is, the transition mode is the other mode at this time to ensure the normal operation of the system.

[0128] In one example, for instance, if the demand mode is battery + occupant compartment dual refrigeration ①②, if the blower terminal voltage is less than the preset voltage value, such as the blower terminal voltage is less than 2 volts or the blower voltage is abnormal or the blower fails or the evaporator temperature sensor fails, then the transition mode is the battery refrigeration mode, that is, ②; if the battery water pump is closed, then the transition mode is ①; if the battery water pump is closed and (the blower terminal voltage < 2v or the blower voltage is abnormal or the blower fails or the evaporator temperature sensor fails), then the transition mode is 0, that is, the no-operation mode, and the vehicle air conditioner does not enter the mode.

[0129] In one example, if the vehicle has a corresponding fault in the current mode, the mode is also switched to the mode without the corresponding fault or the no-operation mode in the same way as above.

[0130] If the first judgment result is that the vehicle state in the current mode is a preset special state, determine that the transition mode is the no-operation mode; wherein, the preset special state includes at least one of the heat pump air-conditioning system vacuuming, the whole vehicle coolant filling trigger, the whole vehicle powering off, the electronic expansion valve initialization not completed, and the whole vehicle high voltage being lower than the preset high voltage threshold.

[0131] The prior art does not specifically design the mode switching of the air-conditioning system when the vehicle is in special working conditions, and still uses the conventional mode switching logic under special working conditions, resulting in potential risks in system reliability and safety.

[0132] In this embodiment, by accurately identifying preset special states such as the heat pump air-conditioning system vacuuming and the whole vehicle coolant filling trigger, when it is detected that the vehicle is in such an unready state, it is forcibly determined that the transition mode is the no-operation mode, and all mode switching and actuator actions are prohibited, such as the compressor and blower starting. Compared with the prior art, in special states, component operation may be mis-triggered, such as starting the compressor during coolant filling, resulting in wear. In this embodiment, by identifying the vehicle state and the active protection mechanism, hardware damage caused by forced switching when the whole vehicle is not ready is avoided from the source, and the fault tolerance of the vehicle is improved.

[0133] Exemplarily, if the vehicle state is in at least one of the following conditions: the heat pump air conditioning system is being evacuated, the filling of the vehicle's coolant is triggered, the vehicle is powered off, the initialization of the electronic expansion valve is not completed, and the vehicle's high voltage is lower than a preset high voltage threshold, such as 150V, then the vehicle is considered to be in a preset special state. To prevent system anomalies caused by the operation of the air conditioning system, the air conditioning is restricted from entering the mode.

[0134] In this embodiment, specific transition modes are set respectively for different high-priority conditions, enabling refined handling of fault scenarios: when there is a dehumidification requirement, the current mode is maintained to avoid affecting the dehumidification effect and driving safety; when a fault occurs, it switches to a fault-free mode or no operation to prevent the expansion of the fault; when in a special state, the operation is stopped to avoid hardware damage caused by forced switching when the vehicle is not ready, enhancing the vehicle's fault tolerance.

[0135] Step 204: Control the heat pump air conditioning system to perform mode switching according to the current mode, transition mode, and required mode.

[0136] In one example, step 204 includes:

[0137] If the current mode, transition mode, and required mode are all different, and there is no corresponding fault in the vehicle under the required mode, then control the heat pump air conditioning system to switch from the current mode to the transition mode first, and then control the heat pump air conditioning system to switch from the transition mode to the required mode.

[0138] Exemplarily, if the current mode, transition mode, and required mode are all different, and there is no corresponding fault in the vehicle under the required mode, then the transition mode is a combination of the current mode and the required mode, that is, first switch the vehicle air conditioning from the current mode to the combination of the current mode and the required mode, and when it is stable, switch from the combination of the current mode and the required mode to the required mode.

[0139] In one example, this embodiment can achieve mode switching by assigning values to the modes. For example, after determining the transition mode, assign the transition mode to the next mode of the vehicle air conditioning to perform mode switching. After the switching is completed, the new current mode is the transition mode. At this time, assign the required mode to the new next mode. After the switching is completed for a preset time or the vehicle air conditioning runs stably, use the new next mode to switch the new current mode.

[0140] If the current mode, transition mode, and required mode are all different, and there are some faults in the vehicle under the required mode, then control the heat pump air conditioning system to switch from the current mode to the mode in the required mode that has no corresponding fault.

[0141] Exemplarily, if the current mode, the transition mode, and the demand mode are all different, and there are partial faults in the vehicle in the demand mode, the transition mode is the mode without corresponding faults in the demand mode. At this time, the vehicle air conditioner is switched from the current mode to this transition mode to prevent the expansion of faults and meet the demands to the greatest extent possible under fault conditions.

[0142] If the current mode is the same as the transition mode, the heat pump air conditioning system is controlled not to perform mode switching.

[0143] If the transition mode is the no-operation mode, the heat pump air conditioning system is controlled to stop working.

[0144] In one example, if the air conditioning system is in the off state, the general transition mode is consistent with the demand mode.

[0145] In summary, in this embodiment, the transition mode plays a special role in system stability, connecting the preceding with the following: specific transition modes are set respectively for different high-priority conditions, enabling refined processing of fault scenarios: maintaining the current mode during dehumidification requirements to avoid affecting the dehumidification effect; switching to the fault-free mode or no operation during faults to prevent the expansion of faults; stopping operations in special states to avoid hardware damage caused by forced switching when the whole vehicle is not ready, improving the fault tolerance of the vehicle.

[0146] Figure 3 It is a schematic structural diagram of a mode switching device for a vehicle air conditioner provided by an embodiment of the present application. As Figure 3 shown, the mode switching device for a vehicle air conditioner provided in this embodiment may include:

[0147] A first processing unit 31, configured to obtain a demand mode for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery demand, and the occupant compartment demand.

[0148] A second processing unit 32, configured to determine a transition mode based on the demand mode, the current mode of the heat pump air conditioning system, and a preset transition mode determination condition.

[0149] A switching unit 33, configured to control the heat pump air conditioning system to perform mode switching according to the current mode, the transition mode, and the demand mode.

[0150] In a possible implementation manner, the transition mode determination condition includes multiple conditions, and the multiple conditions are respectively set according to at least one of the compressor speed, the vehicle dehumidification demand, the vehicle fault information, and the vehicle status information, and different condition determination priorities are different; the second processing unit 32 is specifically configured to:

[0151] Based on the demand mode, the current mode, and the determination priorities of the multiple conditions in the transition mode determination condition, perform transition mode determination to obtain a determination result; and determine the transition mode according to the determination result.

[0152] In a possible implementation, the transition mode determination conditions include whether the compressor speed in the current mode is greater than a preset speed threshold, whether the vehicle has a dehumidification requirement in the current mode, whether the vehicle has a corresponding fault in the required mode, and whether the vehicle state in the current mode is a preset special state.

[0153] Among them, the determination priorities of whether the vehicle has a dehumidification requirement in the current mode, whether the vehicle has a corresponding fault in the required mode, and whether the vehicle state in the current mode is a preset special state are higher than the determination priority of whether the compressor speed in the current mode is greater than a preset speed threshold.

[0154] The second processing unit 32 is specifically configured to:

[0155] Judge whether the vehicle has a dehumidification requirement in the current mode, whether the vehicle has a corresponding fault in the required mode, and whether the vehicle state in the current mode is a preset special state, and obtain a first judgment result; if the first judgment result is that the vehicle has no dehumidification requirement in the current mode, the vehicle has no corresponding fault in the required mode, and the vehicle state in the current mode is not a preset special state, then judge whether the compressor speed in the current mode is greater than a preset speed threshold, obtain a second judgment result, and use the second judgment result as the final judgment result.

[0156] In a possible implementation, the second processing unit 32 is specifically configured to:

[0157] If the second judgment result is that the compressor speed in the current mode is greater than a preset speed threshold, determine that the transition mode is a combination of the current mode and the required mode.

[0158] In a possible implementation, the second processing unit 32 is specifically configured to:

[0159] If the first judgment result is that the vehicle has a dehumidification requirement in the current mode, the vehicle has a corresponding fault in the required mode, or the vehicle state in the current mode is a preset special state, stop the judgment and use the first judgment result as the final judgment result.

[0160] In a possible implementation, the second processing unit 32 is further specifically configured to:

[0161] If the first judgment result is that the vehicle has a dehumidification requirement in the current mode, the transition mode is determined as the current mode; if the first judgment result is that the vehicle has a corresponding fault in the demand mode, the transition mode is determined as the mode without the corresponding fault in the demand mode or the no-operation mode; if the first judgment result is that the vehicle state in the current mode is a preset special state, the transition mode is determined as the no-operation mode; where the preset special state includes at least one of vacuum pumping of the heat pump air-conditioning system, triggering of vehicle coolant filling, vehicle power-off, incomplete initialization of the electronic expansion valve, and vehicle high voltage lower than the preset high voltage threshold.

[0162] In a possible implementation, the occupant compartment demand includes occupant demand and vehicle dehumidification demand; the vehicle battery demand is for refrigeration, heating or no demand, the occupant demand is for refrigeration, heating or ventilation, and the vehicle dehumidification demand is for demand or no demand; the first processing unit 31 is specifically configured to:

[0163] According to the preset temperature range, determine the temperature range corresponding to the ambient temperature of the vehicle.

[0164] Obtain the preset mapping relationship; where the preset mapping relationship is the mapping relationship between different temperature ranges, different vehicle battery demands, different occupant demands, and different combinations of vehicle dehumidification demands and the demand modes of the vehicle heat pump air-conditioning system.

[0165] Based on the preset mapping relationship, as well as the temperature range corresponding to the ambient temperature of the vehicle, the vehicle battery demand, the occupant demand, and the vehicle dehumidification demand, obtain the demand mode for the vehicle heat pump air-conditioning system.

[0166] In a possible implementation, the switching unit 33 is specifically configured to:

[0167] If the current mode, the transition mode, and the demand mode are all different, and the vehicle has no corresponding fault in the demand mode, control the heat pump air-conditioning system to switch from the current mode to the transition mode, and then control the heat pump air-conditioning system to switch from the transition mode to the demand mode.

[0168] If the current mode, the transition mode, and the demand mode are all different, and the vehicle has some faults in the demand mode, control the heat pump air-conditioning system to switch from the current mode to the mode without the corresponding fault in the demand mode.

[0169] If the current mode is the same as the transition mode, control the heat pump air-conditioning system not to perform mode switching.

[0170] If the transition mode is the no-operation mode, control the heat pump air-conditioning system to stop working.

[0171] It should be noted that for the content such as information interaction and execution process among the above-mentioned devices / modules, since it is based on the same concept as the method embodiments of this application, for its specific functions and the technical effects brought, reference can be specifically made to the method embodiment part, and details will not be elaborated here.

[0172] Figure 4 It is a schematic structural diagram of a vehicle provided by an embodiment of this application. As Figure 4 shown, the vehicle 400 of this embodiment includes: a processor 410 and a memory 420. A computer program 421 that can run on the processor 410 is stored in the memory 420. When the processor 410 executes the computer program 421, it implements the steps in any of the above-mentioned method embodiments, such as Figure 1 the steps 101 to 103 shown. Alternatively, when the processor 410 executes the computer program 421, it implements the functions of each module / unit in the above-mentioned device embodiments.

[0173] Exemplarily, the computer program 421 can be divided into one or more modules / units. One or more modules / units are stored in the memory 420 and executed by the processor 410 to complete this application. One or more modules / units can be a series of computer program instruction segments capable of completing specific functions, and these instruction segments are used to describe the execution process of the computer program 421 in the vehicle 400.

[0174] Those skilled in the art can understand that Figure 4 this is only an example of a vehicle and does not constitute a limitation on the vehicle. It may include more or fewer components than shown in the figure, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0175] The processor 410 can be a central processing unit (CPU), or can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0176] The memory 420 can be an internal storage unit of the vehicle, such as the vehicle's hard disk or memory, or an external storage device of the vehicle, such as a plug-in hard disk equipped on the vehicle, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. The above-mentioned memory 420 can also include both the internal storage unit of the vehicle and the external storage device. The above-mentioned memory 420 is used to store computer programs and other programs and data required by the vehicle. The memory 420 can also be used to temporarily store the data that has been output or will be output.

[0177] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above-mentioned division of each functional unit and module is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a first processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated herein.

[0178] An embodiment of the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it realizes the mode switching of the vehicle air conditioner described above.

[0179] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0180] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0181] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections between each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0182] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0183] In addition, each functional unit in the various embodiments of the present application can be integrated in a first processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0184] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above method embodiments of the present application, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0185] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for mode switching of a vehicle air conditioner, characterized in that, The method includes: Obtaining a demand pattern for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery demand, and the occupant compartment demand; Determining a transition mode based on the demand pattern, the current mode of the heat pump air conditioning system, and a preset transition mode determination condition; Controlling the heat pump air conditioning system to perform mode switching according to the current mode, the transition mode, and the demand pattern.

2. The method for mode switching of a vehicle air conditioner according to claim 1, wherein, The transition mode determination condition includes multiple conditions, and the multiple conditions are respectively set according to at least one of the compressor speed, the vehicle dehumidification demand, the vehicle fault information, and the vehicle state information, and different conditions have different judgment priorities; The determining the transition mode based on the demand pattern, the current mode of the heat pump air conditioning system, and the preset transition mode determination condition includes: Performing a transition mode judgment based on the demand pattern, the current mode, and the judgment priorities of the multiple conditions in the transition mode determination condition to obtain a judgment result; Determining the transition mode according to the judgment result.

3. The method for mode switching of a vehicle air conditioner according to claim 2, wherein, The transition mode determination condition includes whether the compressor speed in the current mode is greater than a preset speed threshold, whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state; Among them, the judgment priorities of whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state are higher than the judgment priority of whether the compressor speed in the current mode is greater than the preset speed threshold; The performing a transition mode judgment based on the demand pattern, the current mode, and the judgment priorities of the multiple conditions in the transition mode determination condition to obtain a judgment result includes: Judging whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state to obtain a first judgment result; If the first judgment result is that the vehicle has no dehumidification demand in the current mode, the vehicle has no corresponding fault in the demand mode, and the vehicle state in the current mode is not a preset special state, then judge whether the compressor speed in the current mode is greater than the preset speed threshold to obtain a second judgment result, and use the second judgment result as the final judgment result.

4. The method for mode switching of a vehicle air conditioner according to claim 3, wherein, The determining the transition mode according to the judgment result includes: If the second judgment result is that the compressor speed in the current mode is greater than the preset speed threshold, then determine that the transition mode is a combination of the current mode and the demand mode.

5. The method for mode switching of a vehicle air conditioner according to claim 3, characterized in that, After obtaining the first judgment result by judging whether the vehicle has a dehumidification demand in the current mode, whether the vehicle has a corresponding fault in the demand mode, and whether the vehicle state in the current mode is a preset special state, it further includes: If the first judgment result is that the vehicle has a dehumidification demand in the current mode, the vehicle has a corresponding fault in the demand mode, or the vehicle state in the current mode is a preset special state, then stop the judgment and use the first judgment result as the final judgment result.

6. The method for switching modes of a vehicle air conditioner according to claim 5, characterized in that, The determining the transition mode according to the judgment result includes: If the first judgment result is that the vehicle has a dehumidification requirement in the current mode, determine that the transition mode is the current mode; If the first judgment result is that the vehicle has a corresponding fault in the demand mode, determine that the transition mode is the mode without the corresponding fault in the demand mode or the no-operation mode; If the first judgment result is that the vehicle state in the current mode is a preset special state, determine that the transition mode is the no-operation mode; wherein, the preset special state includes at least one of vacuum pumping of the heat pump air conditioning system, triggering of vehicle coolant filling, vehicle power-off, incomplete initialization of the electronic expansion valve, and vehicle high voltage lower than the preset high voltage threshold.

7. The mode switching method of the vehicle air conditioner according to any one of claims 1 to 6, characterized in that, The occupant compartment requirement includes occupant requirement and vehicle dehumidification requirement; The obtaining of the demand mode for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery requirement, and the occupant compartment requirement includes: Determine the temperature range corresponding to the ambient temperature of the vehicle according to the preset temperature range; Obtain a preset mapping relationship; wherein, the preset mapping relationship is the mapping relationship between different temperature ranges, different vehicle battery requirements, different occupant requirements, and different combinations of vehicle dehumidification requirements and the demand mode of the vehicle heat pump air conditioning system; Based on the preset mapping relationship, and the temperature range corresponding to the ambient temperature of the vehicle, the vehicle battery requirement, the occupant requirement, and the vehicle dehumidification requirement, obtain the demand mode for the vehicle heat pump air conditioning system.

8. The method for mode switching of a vehicle air conditioner according to any one of claims 1 to 6, characterized in that, The controlling of the heat pump air conditioning system to perform mode switching according to the current mode, the transition mode, and the demand mode includes: If the current mode, the transition mode, and the demand mode are all different, and the vehicle has no corresponding fault in the demand mode, control the heat pump air conditioning system to switch from the current mode to the transition mode, and then control the heat pump air conditioning system to switch from the transition mode to the demand mode; If the current mode, the transition mode, and the demand mode are all different, and the vehicle has some faults in the demand mode, control the heat pump air conditioning system to switch from the current mode to the mode without the corresponding fault in the demand mode; If the current mode is the same as the transition mode, control the heat pump air conditioning system not to perform mode switching; If the transition mode is the no-operation mode, control the heat pump air conditioning system to stop working.

9. A mode switching device for a vehicle air conditioner, characterized in that, The device includes: A first processing unit, configured to obtain a demand mode for the vehicle heat pump air conditioning system according to the ambient temperature of the vehicle, the vehicle battery requirement, and the occupant compartment requirement; A second processing unit, configured to determine a transition mode based on the demand mode, the current mode of the heat pump air conditioning system, and a preset transition mode judgment condition; A switching unit, configured to control the heat pump air conditioning system to perform mode switching according to the current mode, the transition mode, and the demand mode.

10. A vehicle, characterized in that, The vehicle includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, it implements the method for mode switching of the vehicle air conditioner according to any one of claims 1 to 8.

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