Air conditioner control method and related device

Abstract

The invention provides an air conditioner control method and a related device, the method relates to the technical field of air conditioners, and the method comprises the steps that the fault type of an air conditioner is obtained; and under the condition that the fault type is a non-compressor hardware fault, target operation parameters matched with the operation state are obtained from a preset database, and the air conditioner is controlled to operate according to the target operation parameters. According to the method provided by the invention, the air conditioner can be controlled to continuously operate under the condition of non-compressor hardware fault, so that the condition that the air conditioner is shut down when any fault occurs is avoided, and the refrigeration and heating requirements of a user are met as far as possible.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to an air conditioner control method and related devices. Background Art

[0002] As the temperature control center of the vehicle occupant compartment, the air conditioner can provide the vehicle with cooling / heating functions and improve human comfort. With the widespread application and rapid development of air conditioner technology, the importance of the stability and reliability design of the air conditioner system has also been increasing.

[0003] When the air conditioner operates, it needs to collect multiple sensor signals in the vehicle and determine the working mode based on an algorithm, and output execution parameters. When one or more of the collected signals are abnormal, the compressor usually stops operating, that is, the cooling / heating function fails. For some air conditioner systems equipped with positive temperature coefficient (PTC) thermistor heaters, when the collected data has problems and the system is in the heating working mode, the compressor stops working and the PTC is started to maintain the system heating function.

[0004] Currently, the air conditioner system generally adopts the method of stopping operation in case of any failure. This processing method cannot provide continuous cooling and heating functions, thus unable to meet the needs of users. Summary of the Invention

[0005] Embodiments of this application provide an air conditioner control method and related devices.

[0006] In a first aspect, embodiments of this application provide an air conditioner control method, including:

[0007] Obtain the fault type of the air conditioner;

[0008] When the fault type of the air conditioner is a non-compressor hardware fault, obtain target operating parameters matching the operating state from a preset database;

[0009] Control the operation of the air conditioner according to the target operating parameters.

[0010] It can be seen that in embodiments of this application, when the fault type of the air conditioner is a non-compressor hardware fault, target operating parameters matching the operating state are obtained from a preset database, so that the air conditioner continues to operate according to the target operating parameters. Therefore, by implementing the embodiments of this application, the method of stopping operation in case of any failure is avoided, and the cooling and heating needs of users are satisfied as much as possible.

[0011] Based on the first aspect, in a possible implementation, the preset database includes multiple sets of operating parameters matching multiple operating states.

[0012] Based on the first aspect, in a possible implementation manner, the multiple sets of operating parameters are obtained by training based on sample data, and the sample data includes multiple sets of sample operating parameters in the multiple operating states.

[0013] Based on the first aspect, in a possible implementation manner, when the fault type of the air conditioner is a non-compressor hardware fault, obtaining target operating parameters matching the operating state from a preset database includes:

[0014] Inputting the data representing the operating state into the preset database to obtain the target operating parameters, where the data representing the operating state includes non-abnormal signals among the signals collected by multiple sensors, and the target operating parameters include any one or more of the rotational speed of the compressor, the valve opening degree of the compressor, and the circulating air volume.

[0015] It can be seen that in the embodiments of the present application, by adding a database, for the case where the fault type is a non-compressor hardware fault, the target operating parameters can still be obtained, and the air conditioner is adjusted through the target operating parameters, so as to achieve the purpose of refrigeration or heating, meet the user's needs, and improve the user experience.

[0016] Based on the first aspect, in a possible implementation manner, the signals collected by the multiple sensors further include abnormal signals, and obtaining the fault type of the air conditioner includes:

[0017] If the abnormal signals include at least one of the current signal, voltage signal, and chip temperature of the compressor, it is determined that the fault type of the air conditioner is a compressor hardware fault;

[0018] If the abnormal signals do not include the current signal, voltage signal, and chip temperature of the compressor, it is determined that the fault type of the air conditioner is the non-compressor hardware fault.

[0019] Based on the first aspect, in a possible implementation manner, the non-compressor hardware fault includes a suction and exhaust system fault of the compressor. Among them, if the abnormal signals include at least one of the suction and exhaust pressure and suction and exhaust temperature of the compressor, the abnormal signals indicate a suction and exhaust system fault of the compressor.

[0020] Based on the first aspect, in a possible implementation manner, the method further includes:

[0021] When the fault type of the air conditioner is a compressor hardware fault, stopping the compressor from working;

[0022] For the working mode of the compressor before the compressor stops working, performing different ventilation operations on the air conditioner, and the working mode of the compressor includes a refrigeration mode and a heating mode.

[0023] It can be seen that in the embodiments of the present application, when the fault type is a compressor hardware fault, the compressor is stopped based on safety considerations. When the air conditioner loses its refrigeration / heating function, differentiated ventilation operation processing is performed according to the different current working modes. Therefore, implementing the embodiments of the present application can improve the user's comfort to a certain extent when the refrigeration / heating function of the air conditioner fails, bringing a good experience to the user.

[0024] Based on the first aspect, in a possible implementation manner, the method further includes: displaying fault information on the vehicle's dashboard.

[0025] It can be seen that in the embodiments of the present application, after the air conditioner identifies a fault and performs corresponding logical determination processing, the specific type of the system fault is also displayed on the dashboard to timely remind the user to perform maintenance. Therefore, implementing the embodiments of the present application by refining and classifying the fault types and displaying the specific fault type information on the dashboard is beneficial to improving the maintenance efficiency, accelerating the maintenance progress, and saving time for fault handling.

[0026] In a second aspect, embodiments of the present application provide a controller, including:

[0027] An acquisition module, configured to acquire the fault type of the air conditioner;

[0028] The acquisition module is configured to, when the fault type of the air conditioner is a non-compressor hardware fault, acquire target operating parameters matching the operating state from a preset database;

[0029] A control module, configured to control the operation of the air conditioner according to the target operating parameters.

[0030] Based on the second aspect, in a possible implementation manner, the preset database includes multiple groups of operating parameters matching multiple operating states.

[0031] Based on the second aspect, in a possible implementation manner, the multiple groups of operating parameters are obtained by training based on sample data, and the sample data includes multiple groups of sample operating parameters in the multiple operating states.

[0032] Based on the second aspect, in a possible implementation manner, the acquisition module is configured to:

[0033] Input data representing the operating state into the preset database to acquire the target operating parameters. The data representing the operating state includes non-abnormal signals among signals collected by multiple sensors, and the target operating parameters include any one or more of the rotation speed of the compressor, the valve opening degree of the compressor, and the circulating air volume.

[0034] Based on the second aspect, in a possible implementation manner, the acquisition module is configured to:

[0035] If at least one of the current signal, voltage signal, and chip temperature of the compressor is included in the abnormal signal, it is determined that the fault type of the air conditioner is a compressor hardware fault;

[0036] If the current signal, voltage signal, and chip temperature of the compressor are not included in the abnormal signal, it is determined that the fault type of the air conditioner is a non - compressor hardware fault.

[0037] Based on the second aspect, in a possible implementation, the non - compressor hardware fault includes a suction and exhaust system fault of the compressor. Among them, if at least one of the suction and exhaust pressure and suction and exhaust temperature of the compressor is included in the abnormal signal, the abnormal signal indicates a suction and exhaust system fault of the compressor.

[0038] Based on the second aspect, in a possible implementation, when the fault type of the air conditioner is a compressor hardware fault, the compressor is stopped from working;

[0039] For the working mode of the compressor before it stops working, different ventilation operations are performed on the air conditioner. The working modes of the compressor include a cooling mode and a heating mode.

[0040] Based on the second aspect, in a possible implementation, fault information is displayed on the vehicle's dashboard.

[0041] Each functional module in the second aspect is used to implement the method described in the first aspect and the possible implementations of the first aspect.

[0042] In a third aspect, an embodiment of the present application provides an electronic device, including a memory and a processor. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the method described in the first aspect and any possible implementation of the first aspect.

[0043] In a fourth aspect, an embodiment of the present application provides a readable storage medium, including program instructions. When the program instructions are executed by a controller, the controller is caused to execute the method described in the first aspect and any possible implementation of the first aspect.

[0044] Fifth aspect, the present application provides a computer program product, including program instructions. When the computer program product is executed by a controller, the controller is used to execute the method described in the foregoing first aspect and any possible implementation manner of the first aspect. The computer program product can be a software installation package. In the case where it is necessary to use the method provided by any possible design of the foregoing first aspect, the computer program product can be downloaded and executed on the controller to implement the method described in the first aspect and any possible implementation manner of the first aspect.

[0045] Sixth aspect, the present application provides an air conditioning system, including a compressor and a controller. The controller is used to implement the method described in the foregoing first aspect and any possible implementation manner of the first aspect.

[0046] Seventh aspect, the present application provides a vehicle, including a controller, where the controller is used to implement the method described in the foregoing first aspect and any possible implementation manner of the first aspect, or includes an air conditioning system, and the air conditioning system is used to implement the method described in the foregoing first aspect and any possible implementation manner of the first aspect. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings required to be used in the embodiments of the present application or the background art.

[0048] Figure 1 is a schematic flowchart of an air conditioning control method provided by the present application;

[0049] Figure 2 is a schematic diagram of the division of fault types of an air conditioning control method provided by the present application;

[0050] Figure 3 is a processing flowchart in the case of a compressor hardware fault provided by the present application;

[0051] Figure 4 is a schematic structural diagram of a controller provided by the present application;

[0052] Figure 5 is a schematic structural diagram of another controller provided by the present application;

[0053] Figure 6 is a schematic structural diagram of a vehicle provided by the present application. Detailed Embodiments

[0054] The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0055] It should be noted that the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0056] It should be noted that when used in this specification and the appended claims, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. For example, a system, product or device that includes a series of units / devices is not limited to the listed units / devices, but may optionally further include units / devices not listed, or may optionally further include other units / devices inherent to these products or devices.

[0057] It should also be understood that the term "if" can be interpreted as "when", "once", "in response to determining", "in response to detecting", or "in the case of" according to the context.

[0058] Before introducing the embodiments of the present application, the technical terms related to the embodiments of the present application will be introduced first.

[0059] Positive Temperature Coefficient (PTC) thermistor heater: It is a semiconductor resistor with temperature sensitivity. When the temperature exceeds a certain temperature (Curie temperature), its resistance value increases stepwise with the increase of temperature. When current passes through the PTC, a thermal effect will be generated, so as to achieve the purpose of heating.

[0060] The present application provides an air conditioner control method. Refer to Figure 1 , Figure 1 which is a schematic flow chart of an air conditioner control method provided by the present application. The method includes but is not limited to the following description.

[0061] S101. The controller receives signals collected by various sensors on the vehicle.

[0062] A variety of sensors are arranged in the vehicle. The variety of sensors include sensors for collecting signals on the compressor hardware, such as current sensors, voltage sensors, and chip temperature sensors. The current sensor can be used to measure the magnitude of the current passing through the compressor to monitor the load condition of the motor; the voltage sensor is used to detect whether the power supply voltage is stable; the chip temperature sensor can be used to monitor the temperature of the compressor chip to prevent overheating or overcooling. The variety of sensors also include sensors for collecting the suction and discharge temperatures and pressures of the compressor, which can be used to monitor the suction temperature and discharge temperature in real time. The variety of sensors also include sensors for collecting the temperature of the air outlet of the air conditioner, the temperature of the evaporator, and the temperature of the water side of the plate heat exchanger. The variety of sensors can also include other sensors, which are not limited in this application. Other sensors can be, for example, vehicle interior and exterior temperature sensors. The vehicle interior temperature sensor is used to collect the temperature inside the vehicle, and the vehicle exterior temperature sensor is used to collect the ambient temperature.

[0063] After the variety of sensors collect signals, the collected signals are sent to the controller, and the controller receives the signals collected by the variety of sensors on the vehicle.

[0064] S102. The controller determines the abnormal signals among the signals collected by the variety of sensors.

[0065] Among the signals collected by the variety of sensors, there are abnormal signals and non-abnormal signals. The controller will identify the signal values collected by the sensors and judge whether the signal values are abnormal. The situations where the signal values are abnormal include: the collected signal values exceed the normal value range and no valid data of the signal is collected.

[0066] Algorithms for judging whether different signal values are abnormal are pre-built in the controller, including: reasonable parameter ranges are preset for different signals in the controller. If the collected data exceeds this range, it will be regarded as abnormal data; some thresholds may be set in the controller to judge whether the data is abnormal. According to the setting of the thresholds, if the collected data exceeds or is lower than the thresholds, it is regarded as abnormal. For example, if the pressure collected by the pressure sensor exceeds the set maximum value or is lower than the set minimum value, it will be judged as abnormal; for different signals in the controller, thresholds for the duration of abnormal data may be set. If the duration of abnormal data exceeds a certain threshold, it will be regarded as abnormal. For example, if the indoor temperature sensor breaks down, resulting in the indoor temperature sensor not being able to collect the indoor temperature for a long time and the duration exceeds the threshold set by the air conditioner controller, then the signal value of the indoor temperature will be regarded as abnormal. Regarding the algorithms for judging whether the collected signal values are abnormal, this application does not make specific limitations.

[0067] S103. Determine whether the fault type is a compressor hardware fault.

[0068] When the controller judges the signal values collected by multiple sensors and detects that one or more signal values are abnormal, it identifies the fault types indicated by the signals. Refer to Figure 2 , Figure 2 which is a schematic diagram of the division of fault types for an air conditioner control method provided by this application. The fault types include: hardware faults of the compressor of the air conditioner, non-compressor hardware faults of the air conditioner. The non-compressor hardware faults of the air conditioner include: faults in the suction and exhaust systems of the compressor and faults related to the vehicle body, etc. The hardware faults of the compressor of the air conditioner refer to faults in the hardware devices related to the compressor. In the case of hardware device faults of the compressor, the compressor cannot work properly, that is, it cannot provide refrigeration or heating functions; the suction and exhaust systems of the compressor affect the performance of the compressor. When the suction and exhaust systems of the compressor are normal, the refrigeration or heating functions of the compressor are more effective. When the suction and exhaust systems of the compressor are abnormal or faulty, the refrigeration or heating functions of the compressor are poor. The faults in the suction and exhaust systems of the compressor include faults that occur when the compressor inhales and discharges refrigerant; the faults related to the vehicle body include faults in one or several of multiple sensors, faults in components or devices used to judge the comfort of the vehicle interior environment and adjust the air conditioner system, etc. Regarding the division of fault types, this application does not make specific limitations.

[0069] In the controller, an algorithm for identifying fault types is preset. The algorithm includes: classifying different signals in the controller. The signals indicating hardware faults of the compressor include signals such as the peak current of the compressor, bus current, bus voltage, and chip temperature. These signals reflect the hardware performance status of the compressor. The signals indicating faults in the suction and exhaust systems of the compressor include signals such as the suction and exhaust pressures of the compressor and the suction and exhaust temperatures. Such signals mainly reflect the performance of the compressor after the system runs. The signals indicating faults related to the vehicle body include the temperatures inside and outside the vehicle, the humidity of the vehicle interior environment, the temperatures of the face and foot air outlets, the evaporator temperature, and the water side temperature of the plate heat exchanger, etc. Such signals reflect the vehicle interior environment and vehicle state and can be used to judge the comfort of the vehicle interior environment and adjust the functions of the air conditioner.

[0070] When at least one abnormal signal comes from the category of signals indicating hardware faults of the compressor, it is determined as a hardware fault of the compressor.

[0071] S104. In the case where the fault type is a non-compressor hardware fault, obtain target operating parameters matching the operating state from a preset database.

[0072] In the case where the fault type of the air conditioner is a non-compressor hardware fault, obtain target operating parameters matching the operating state from a preset database. Among them, the preset database includes multiple groups of operating parameters matching multiple operating states. The multiple groups of operating parameters are obtained by training based on sample data. The sample data includes multiple groups of sample operating parameters in multiple operating states.

[0073] When none of the current signal, voltage signal, and chip temperature is included in the abnormal signal, and multiple of the current signal, voltage signal, and chip temperature are not included in the abnormal signal, it is determined that the fault type of the air conditioner is a non-compressor hardware fault.

[0074] When the fault type of the air conditioner is a non-compressor hardware fault, obtain target operating parameters matching the operating state from a preset database, where the target operating parameters refer to the parameters required for the air conditioner to operate to meet user needs. The fault type of the air conditioner being a non-compressor hardware fault includes that the abnormal signal indicates a fault in the compressor's suction and exhaust system, and the abnormal signal indicates a fault related to the vehicle body.

[0075] The database can be trained through a neural network model. First, collect samples. The data samples can be obtained from the data collected by various sensors in air conditioners operating in different actual working environments, or the user's operation habit data can be added to the data samples. The labels of the neural network model are the target operating parameters corresponding to the data collected by various sensors in air conditioners operating in different actual working environments or the target operating parameters corresponding to the user's operation habit data. To facilitate the training and use of the neural network model, preprocess the data collected by various sensors in air conditioners operating in different actual working environments, such as normalization, standardization, etc. Second, divide the dataset. Divide the dataset into a training set, a validation set, and a test set, with the proportions set at 70%, 15%, and 15% respectively. The training set is used to train the parameters of the neural network model, the validation set is used to adjust the hyperparameters and evaluate the performance of the model, and the test set is used to finally evaluate the generalization ability of the model. Regarding the proportions of the training set, validation set, and test set, this application does not make any limitations. Then, construct the model. According to the requirements, design the input layer, hidden layer, and output layer, and determine the number of nodes and activation function for each layer. The activation function can be ReLU, Sigmoid. Regarding the type of activation function, this application does not make specific limitations. Considering the complexity of the problem, the number of hidden layers can be increased to improve the learning ability and expression ability of the model. Finally, perform model training and optimization. Use the training set to perform iterative training of the model, and update the weights and biases of the model through the backpropagation algorithm. Select appropriate optimization algorithms and loss functions, and adjust the hyperparameters according to the results of the validation set, such as the learning rate, regularization parameter, etc. Using a neural network model for training to obtain the database is only one implementation manner of this application.

[0076] The database can also be implemented in a common way by creating two database tables, namely a parameter table and a user habit table. The parameter table is used to store parameter data of the air conditioner under different working environments. The parameter data includes normal signal values collected by multiple sensors when the air conditioner operates under different working environments and their corresponding target operating parameters. The user habit table is used to store the operation habit data of users in daily life and their corresponding target operating parameters. Regarding the update of the database data, it can be updated regularly or in real time. Regular update means updating the database regularly, replacing and supplementing it according to new data to ensure that the data in the database can reflect the current situation. Real-time update means that during operation, according to the real-time collected data, the data in the database can be dynamically updated to maintain the accuracy and practicality of the database. Regarding the production method of the database, the present application does not make specific limitations.

[0077] When the fault type of the air conditioner is a non-compressor hardware fault, a preset database is called, and the non-abnormal signal values in the signals currently collected by multiple sensors are input. Among them, the non-abnormal signal values represent the operating state, and the data in the library similar to the current working environment of the air conditioner is matched, and the target operating parameters are output. The output target operating parameters include the rotation speed of the compressor, the valve opening of the compressor, the circulating air volume, and the circulation ratio. By adjusting the rotation speed of the compressor, the flow rate and compression ratio of the refrigerant in the cycle can be controlled, thereby affecting the cooling or heating effect of the entire system. Different rotation speeds correspond to different cooling / heating capacity levels, and the most suitable rotation speed can be selected according to the indoor temperature and user needs. The valve of the air conditioner is used to control the flow rate and flow direction of the refrigerant. Adjusting the valve opening can change the flow rate ratio of the refrigerant entering and leaving the indoor and outdoor, thereby adjusting the cooling / heating effect. A larger valve opening usually corresponds to a larger cooling capacity, while a smaller valve opening corresponds to a smaller cooling capacity. The valve opening can also be used to finely adjust the flow rate of the refrigerant to adapt to different indoor temperature changes and user needs. The circulating air volume refers to the air volume of the air supply and return air in the air conditioner. Adjusting the circulating air volume can change the flow speed and temperature distribution of the indoor air, thereby affecting the indoor comfort level. A larger circulating air volume can accelerate the flow of the indoor air and make the temperature of the entire room more uniform; a smaller circulating air volume can reduce the flow of the indoor air and is suitable for maintaining the temperature stability of a specific area; the circulation ratio refers to the ratio of the refrigerant in the air conditioner in the cycle, indicating the degree of recovery and reuse of the refrigerant in the cycle. The higher the circulation ratio, the more refrigerant is recovered and reused, thereby improving the energy efficiency and performance.

[0078] In one embodiment, the signals that the controller can obtain include: the temperature inside the vehicle is 25°C, the temperature outside the vehicle is 30°C, the operating mode is the cooling mode, and the signal values such as the current signal, voltage signal, and chip temperature of the compressor are all normal. When the channel temperature signal is abnormal, if the target operating parameters calculated according to the conventional logic operation of the system may not be very accurate, in severe cases, it may cause the compressor to stop, resulting in the failure of the air conditioner's cooling function and affecting the user experience. In this case, the built-in database of the air conditioner can be called, and the normal signals collected by various current sensors are input, such as: the temperature inside the vehicle is 25°C, the temperature outside the vehicle is 30°C, and the cooling mode. The data similar to the current working environment in the library is matched, and the target operating parameters such as the rotational speed of the compressor being 2000 rpm, the circulating air volume being 50 CFM, and the valve opening being 150 steps are output, so that when the channel temperature signal is abnormal, the air conditioner can ensure normal operation while still retaining a certain degree of cooling capacity. Among them, rpm is the abbreviation of "revolutions per minute", which means "revolutions per minute"; CFM is the abbreviation of "cubic feet per minute", which means "cubic feet per minute".

[0079] In another embodiment, the signals that the controller can obtain include: the temperature inside the vehicle is 22°C, the temperature outside the vehicle is 28°C, the operating mode is the cooling mode, the air conditioner startup duration is 15 minutes, and the signal values such as the current signal, voltage signal, and chip temperature of the compressor are all normal. When the outlet air temperature signal is abnormal, the controller cannot obtain the actual outlet air temperature. At this time, it is determined that the compressor can operate normally, and data matching and screening are selected from the built-in database of the system to find the data that is closest to the parameters of the vehicle interior and exterior temperatures, operating mode, air conditioner startup duration, and the owner's operation habits, and the target operating parameters are output, such as: the rotational speed of the compressor is 1200 rpm, the circulating air volume is 400 CFM, and the valve opening is 100 steps. The database can enable the performance of the air conditioner to change with the number of effective signals. Specifically, when the number of effective signals collected by various sensors is more, the target operating parameters obtained by matching in the database will be more in line with the current actual situation, and then the performance of the air conditioner will be better; when the number of effective signals collected by various sensors is less, it is more difficult for the controller to judge the accuracy of the target operating parameters of the air conditioner. At this time, considering the stability and safety of the air conditioner as the first priority, the compressor works at a certain lower constant value, then the performance of the air conditioner is relatively low. Although it cannot well meet the system requirements, it can still ensure the normal operation of the air conditioner while retaining a certain degree of cooling / heating capacity under abnormal conditions of the air conditioner. Among them, the lower constant value is generally in the range of about 20% of the maximum rotational speed that the compressor can provide. Regarding the lower constant value, the present application does not make specific limitations.

[0080] S105. When the failure type of the air conditioner is a compressor hardware failure, the compressor stops working, and different ventilation operations are performed for different working modes.

[0081] See Figure 3 , Figure 3 This is the processing flowchart provided by the present application in the case of compressor hardware failure. The compressor is the core component of the air conditioning system, used to circulate the refrigerant and provide cooling / heating functions. When a hardware failure occurs in the compressor, it may cause it to malfunction, damage other related components, and even affect the overall performance and working effect of the air conditioner. Therefore, the compressor stops working. When the compressor stops working, the cooling / heating function fails. To minimize the discomfort of the user as much as possible, ventilation of the vehicle is required. In different working modes, different ventilation operations need to be performed to provide a better experience for the user. Among them, the working modes include the cooling mode and the heating mode.

[0082] After the compressor stops working, there are various methods to determine the working mode of the air conditioner, including: judging the current working mode of the air conditioner by comparing the difference between the indoor temperature and the outdoor temperature. If the indoor temperature is higher than the outdoor temperature, it can be judged as the cooling mode; if the indoor temperature is lower than the outdoor temperature, it can be judged as the heating mode; the air conditioning system usually has corresponding setting parameters for setting the circulating air volume in the cooling mode and the heating mode. After the compressor stops, the system can judge the current working mode of the air conditioner by reading or detecting the value of the circulating air volume setting parameter. If the circulating air volume setting parameter is a large value, it can be judged as the cooling mode; if the circulating air volume setting parameter is a small value, it can be judged as the heating mode; the air conditioner may have a status history recording function, which can record the operating status and operation mode of the system. After the compressor stops, the system can judge the recent working mode by reading the history record. The controller can infer the current working mode based on the recent several operating states. For example, if the recent several operating states are all in the heating mode, then it can be judged that the current is also the heating mode; some advanced air conditioners may provide the function of giving priority to user settings. After the compressor stops, the system can judge the current working mode by reading the user's setting parameters. If the user has previously set a preferred working mode (cooling or heating), then it shall be subject to the user's setting. The specific method for judging the working mode will vary due to different designs of the air conditioning system. In practical applications, according to the specific air conditioning system, multiple judgment methods can be combined to determine the current working mode of the air conditioner to provide accurate operating status feedback and user experience. Regarding the judgment of the air conditioner working mode, the present application does not make specific limitations.

[0083] In the heating mode, the air conditioner can heat in two ways: through the compressor and PTC. PTC is usually used for system auxiliary heating. During the rapid heating stage, the air conditioner needs to quickly raise the temperature of the passenger compartment. In this stage, the compressor and PTC work together to heat up quickly. The compressor releases heat through the compression of the circulating refrigerant, while the PTC quickly provides additional heat through its own heating to rapidly increase the temperature inside the vehicle to the set value. For example, when the user starts the vehicle and sets a high indoor temperature (such as 25 degrees Celsius), the air conditioner enters the heating mode. At this time, the compressor starts to work and releases heat, while the PTC also starts simultaneously, quickly providing additional heat to the passenger compartment through its own heating. In this way, the compressor and PTC work together to quickly raise the temperature of the passenger compartment, improving the riding comfort. Once the passenger compartment reaches the set temperature, the system enters the temperature maintenance stage. In this stage, to improve the energy efficiency ratio of the air conditioner and reduce the energy consumption of the air conditioner, the PTC gradually reduces the gear to off and only heats through the compressor. At this time, since the temperature inside the vehicle is maintained at a comfortable state, the PTC no longer needs to provide additional heating capacity, thus reducing the power consumption and energy consumption. For example, when the temperature of the passenger compartment reaches the set value (such as 25 degrees Celsius), the system enters the temperature maintenance stage. At this time, the PTC gradually reduces the heating gear and finally turns off. The air conditioner only relies on the compressor to work, providing the required heating effect by circulating the refrigerant to maintain the comfortable temperature inside the vehicle. In this way, the system energy efficiency is improved, and at the same time, the energy consumption of the PTC is reduced. When the compressor fails to work due to certain factors, the PTC will restart to meet the heating requirements of the air conditioner.

[0084] In the cooling mode, the air conditioner only cools through the compressor. When the compressor fails to start due to certain elements, the system loses its cooling function.

[0085] Ventilation is to introduce outside air into the vehicle to replace the air inside the vehicle, so as to achieve the effect of circulating ventilation. This can effectively remove odors, moisture, carbon dioxide and other waste substances inside the vehicle and keep the air inside the vehicle fresh. The ventilation function of the air conditioner is achieved by the coordinated work of equipment such as the blower, air inlet, and air outlet. Among them, the blower is driven by an electric motor and generates air flow through a rotating impeller. It is usually installed at the bottom or top of the instrument panel; the air inlet is the entrance for the ventilation system to introduce outside air, and filters the incoming air through a filter to ensure the quality of the air inside the vehicle. It is usually located in the engine compartment at the front of the vehicle; the air outlet is the outlet for discharging waste inside the vehicle, and the air flow direction and flow rate can be adjusted by controlling the direction and speed of the blower. It is usually installed in the center of the instrument panel or under each seat. Different ventilation operations are carried out in the cooling and heating modes to meet the comfort requirements in different working modes.

[0086] When the compressor stops working and the air conditioner determines that the current operating mode is the cooling mode, considering that the current environment is usually in a relatively hot state, the air conditioner performs a ventilation operation with medium air volume and medium circulation ratio. The medium air volume and medium circulation ratio can promote the air flow in the cabin, making the air inside the vehicle better blend with the circulated air, improving the air quality of the entire carriage, and also strengthening the heat transfer and removal, taking away part of the heat inside the vehicle, thereby reducing the temperature inside the vehicle and improving the cooling effect. The reason for not adopting the full open circulation with large air volume is that although it can quickly reduce the temperature inside the vehicle, it may introduce a large amount of outdoor air, causing energy waste. The reason for not using low air volume and small circulation ratio is that the low air volume cannot meet the air flow requirements in the cabin, and this operation will make it less likely for users to feel cool in a hot environment. In another embodiment, on a hot summer day, the vehicle is parked outdoors under direct sunlight, and the temperature is as high as 40 degrees Celsius. The compressor of the air conditioner stops working, and at this time, it is in the cooling mode. According to the ventilation strategy of the air conditioner, a medium air volume and medium circulation operation is performed, with the set air supply volume being 50% and the circulation ratio being 50%. Such an operation method can ensure the air fluidity in the cabin, while ensuring the air quality in the cabin and reducing the temperature inside the vehicle.

[0087] When the compressor stops working and the air conditioner determines that the current operating mode is the heating mode, if the air conditioner is not equipped with PTC, then the heating function of the air conditioner will fail. Considering that the current environment is usually in a relatively cold state, the air conditioner performs a ventilation operation with low air volume and small circulation ratio. By adopting the low air volume operation, a large amount of cold air can be reduced from directly entering the cabin, avoiding discomfort and cold feelings for the occupants, and the small circulation ratio can also maintain a certain air permeability in the occupant compartment. The reason for not adopting the full open circulation with large air volume is that this operation method will introduce a large amount of outdoor air and accelerate the indoor air flow, which may cause strong cold air to blow towards the occupants, affecting the comfort of the occupants. The reason for not using the medium air volume and medium circulation ratio is that the medium air volume may still be relatively large, and it is easy to send more cold air into the cabin.

[0088] In another embodiment, on a cold winter day, the vehicle is parked outdoors where the ambient temperature is below zero degree Celsius and the indoor temperature is 10 degrees Celsius. The compressor of the air conditioner stops working, and at this time, it is in the heating mode. At this time, according to the ventilation strategy of the air conditioner, a low air volume and small circulation ratio operation is performed, with the set air supply volume being 30% and the circulation ratio being 20%. Such an operation method can reduce the cold feeling in the occupant compartment and improve the riding comfort.

[0089] When the compressor stops working and the air conditioner determines that the current operating mode is the heating mode, if the air conditioner is equipped with a PTC and the PTC can be used normally, then heating can be carried out through the PTC, and the target operating parameters are output according to the conventional logic of the air conditioner, such as the gear of the PTC, so as to achieve the heating function; if the air conditioner is equipped with a PTC and the PTC cannot be used normally, then the heating function of the air conditioner will fail. Considering that the current environment is usually in a relatively cold state, the air conditioner performs a ventilation operation with a small air volume and a small circulation ratio. Among them, the conventional logic means that when the controller receives the normal signals from each sensor, a specific control algorithm is used to analyze and determine the numerical value of the output parameters. Commonly used control algorithms include the PID control algorithm and the fuzzy logic control algorithm. Regarding the control algorithm, no application is made and no specific limitation is given.

[0090] In another embodiment, the controller analyzes the data such as the indoor temperature of 26 degrees Celsius transmitted back by the indoor temperature sensor, the outdoor temperature of 32 degrees Celsius transmitted back by the outdoor temperature sensor, the humidity of 60% transmitted back by the humidity sensor, and the pressure of 3 bar transmitted back by the pressure sensor by using the fuzzy logic control algorithm. According to the value transmitted back by the indoor temperature sensor, the fuzzy logic control algorithm determines that refrigeration is required. According to the values transmitted back by the outdoor temperature sensor and the humidity sensor, the fuzzy logic control algorithm calculates the appropriate air volume and circulation ratio. According to the value transmitted back by the pressure sensor, the fuzzy logic control algorithm adjusts the opening of the valve. Finally, through calculation, the fuzzy logic control algorithm obtains the target operating parameters, the gear of the PTC turned on is 2, the air volume is 300 CFM, the compressor speed is 4500 rpm, the circulation ratio is 60%, and the valve opening is 420 steps.

[0091] S106. Control the operation of the air conditioner according to the target operating parameters.

[0092] Configure the air conditioner according to the target operating parameters so that the air conditioner can operate, thereby meeting the comfort requirements of users.

[0093] S107. Display the fault information on the dashboard.

[0094] In the controller, an algorithm for identifying the fault type is preset. This algorithm has been described in S103. To make the specification as concise as possible, this algorithm will not be elaborated here. After identifying the fault type, the fault information can be indicated on the dashboard. It can be displayed in ways such as text, icons, and indicator lights on the instrument. For example, the instrument display can show specific fault types such as "compressor hardware failure" and "suction and exhaust system failure of the compressor", or use corresponding icons to represent them. In addition to displaying the specific fault type on the dashboard, the controller can also remind the user through voice prompts or warning lights. For example, when a compressor hardware failure occurs, the dashboard can issue a voice prompt to inform the user that they need to check and repair the compressor hardware. Or use a red warning light to indicate an urgent fault that needs to be dealt with immediately. To help the user better understand and solve the fault, the dashboard can also display the fault code and provide a reference to the corresponding user manual. The fault code is a concise and standardized representation. The user can query the user manual according to the code to understand the specific fault cause and repair method. Regarding the way of prompting the fault information, no specific limitation is applied.

[0095] This application maximally ensures the realization of the air-conditioning refrigeration / heating function and accelerates the repair efficiency during air-conditioning failures by refining the division of fault types, adding the application of a database to the system, and displaying the specific fault type on the dashboard. When both the compressor / PTC cannot start and the system loses the refrigeration / heating function, differential processing operations are performed according to different working modes to maximally ensure the comfort of the occupants.

[0096] This application provides a controller. Refer to Figure 4 , Figure 4 which is a schematic structural diagram of a controller 400 provided by this application. The controller 400 can be Figure 1 the controller in the method embodiment. The controller 400 includes:

[0097] An acquisition module 410, configured to acquire the fault type of the air conditioner;

[0098] The acquisition module 410 is configured to, when the fault type of the air conditioner is not a compressor hardware failure, acquire target operating parameters matching the operating state from a preset database;

[0099] A control module 420, configured to control the operation of the air conditioner according to the target operating parameters.

[0100] In a possible implementation, the preset database includes multiple groups of operating parameters matching multiple operating states.

[0101] In a possible implementation, multiple sets of operating parameters are obtained through training based on sample data, where the sample data includes multiple sets of sample operating parameters under multiple operating states.

[0102] In a possible implementation, the obtaining module 410 is configured to:

[0103] Input the data representing the operating state into a preset database to obtain target operating parameters. The data representing the operating state includes non-abnormal signals among the signals collected by multiple sensors, and the target operating parameters include any one or more of the rotational speed of the compressor, the valve opening degree of the compressor, and the circulating air volume.

[0104] In a possible implementation, the obtaining module 410 is configured to:

[0105] If the abnormal signals include at least one of the current signal, voltage signal, and chip temperature of the compressor, determine that the fault type of the air conditioner is a compressor hardware fault;

[0106] If the abnormal signals do not include the current signal, voltage signal, and chip temperature of the compressor, determine that the fault type of the air conditioner is a non-compressor hardware fault.

[0107] In a possible implementation, the non-compressor hardware fault includes a suction and exhaust system fault of the compressor. Among them, if the abnormal signals include at least one of the suction and exhaust pressure and suction and exhaust temperature of the compressor, the abnormal signals indicate a suction and exhaust system fault of the compressor.

[0108] In a possible implementation, if the fault type of the air conditioner is a compressor hardware fault, stop the compressor from working;

[0109] For the working mode of the compressor before it stops working, perform different ventilation operations on the air conditioner. The working modes of the compressor include a refrigeration mode and a heating mode.

[0110] In a possible implementation, display the fault information on the vehicle's instrument panel.

[0111] Figure 4 Each of the functional modules in is used to implement Figures 1 to 3 the steps of the method embodiment. For details, please refer to Figures 1 to 3 the description of the relevant content in the method embodiment. For the sake of simplicity of the specification, it will not be elaborated here.

[0112] This application also provides an electronic device. Refer to Figure 5 , Figure 5 which is a schematic structural diagram of an electronic device 500 provided by this application. The electronic device is used to implement Figures 1 to 3In the described method embodiment, the electronic device 500 includes: a processor 510, a communication interface 520, and a memory 530. Among them, the processor 510, the communication interface 520, and the memory 530 can be interconnected through an internal bus 540, or can communicate through other means such as wireless transmission.

[0113] Taking the connection through the bus 540 as an example, the bus 540 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 540 can be divided into an address bus, a data bus, a control bus, etc. For the sake of easy representation, Figure 5 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0114] The processor 510 can be composed of at least one general-purpose processor, such as a CPU, or a combination of a CPU and a hardware chip. The above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. The processor 510 executes various types of digital storage instructions, such as software or firmware programs stored in the memory 530, and it can enable the controller 500 to provide a wide variety of services.

[0115] The memory 530 is used to store program codes and is controlled by the processor 510 to execute the Figures 1 to 3 steps described in the above embodiment. Specifically, reference can be made to the relevant descriptions of the above-mentioned embodiment, and details will not be elaborated here.

[0116] The memory 530 can include volatile memory, such as RAM; the memory 530 can also include non-volatile memory, such as ROM, flash memory; the memory 530 can also include a combination of the above types.

[0117] The communication interface 520 can be a wired interface (such as an Ethernet interface), an internal interface (such as a peripheral component interconnect express (PCIE) bus interface), a wired interface (such as an Ethernet interface), or a wireless interface (such as a cellular network interface or a wireless local area network interface) for communicating with other devices or modules.

[0118] The processor 510, communication interface 520, etc. in the electronic device 500 can implement the functions and / or various steps and methods in the above-mentioned method embodiments. For the sake of brevity, they will not be elaborated here. The acquisition module 410 and control module 420 in the controller 400 can be located in the processor 510 of the electronic device 500.

[0119] It should be noted that Figure 5 This is merely a possible implementation manner of the embodiments of the present application. In practical applications, the controller may further include more or fewer components, which are not limited here. For the content not shown or described in the embodiments of the present application, reference can be made to the relevant descriptions in the foregoing method embodiments, which will not be elaborated here.

[0120] The present application provides an air conditioning system, including a compressor and a controller. The controller can be configured as the controller 400 or the electronic device 500. The controller is used to implement Figures 1 to 3 the method embodiments.

[0121] The present application provides a vehicle, as Figure 6 shown. The vehicle 600 includes a controller 620 and an air conditioner 610. The controller 620 and the air conditioner 610 are connected through a bus. Among them, the bus can be a peripheral component interconnect PCI bus or an industry standard architecture EISA bus, etc. The bus can be an address bus, a data bus, a control bus, etc., which are not limited in the present application. The controller can be configured as the controller 400 or the electronic device 500. The controller is used to implement Figures 1 to 3 the method embodiments.

[0122] The present application further provides a readable storage medium, including program instructions. When the program instructions are executed by the controller, the controller executes some or all of the steps described in the above-mentioned air conditioning control method embodiments.

[0123] The present application further provides a computer program product, including program instructions. When the program instructions are run by the controller, the controller is caused to execute some or all of the steps described in the above-mentioned air conditioning control method embodiments.

[0124] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0125] In the above embodiments, they can be implemented in whole or in part by software, hardware, or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product may contain code. When the computer program product is read and executed by a computer, some or all of the steps of the method described in the above method embodiments can be implemented. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium, or a semiconductor medium, etc.

[0126] The steps in the method embodiments of this application can be adjusted, combined, or deleted according to actual needs; the units in the device embodiments of this application can be divided, combined, or deleted according to actual needs.

[0127] The above has introduced the embodiments of this application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on this application.

Claims

1. A control method for an air conditioner, characterized in that, it includes: obtaining the fault type of the air conditioner; when the fault type of the air conditioner is a non-compressor hardware fault, obtaining target operating parameters matching the operating state from a preset database; controlling the operation of the air conditioner according to the target operating parameters.

2. The method according to claim 1, characterized in that, the preset database includes multiple sets of operating parameters matching multiple operating states.

3. The method according to claim 2, characterized in that, the multiple sets of operating parameters are obtained by training based on sample data, and the sample data includes multiple sets of sample operating parameters in the multiple operating states.

4. The method according to any one of claims 1 to 3, characterized in that, the step of, when the fault type of the air conditioner is a non-compressor hardware fault, obtaining target operating parameters matching the operating state from a preset database, includes: obtaining the target operating parameters from the preset database according to the data representing the operating state, wherein the data representing the operating state includes non-abnormal signals among the signals collected by multiple sensors, and the target operating parameters include any one or more of the rotational speed of the compressor, the valve opening of the compressor, and the circulating air volume.

5. The method according to claim 4, characterized in that, the signals collected by the multiple sensors further include abnormal signals, and the step of obtaining the fault type of the air conditioner includes: if at least one of the current signal, voltage signal, and chip temperature of the compressor is included in the abnormal signals, determining that the fault type of the air conditioner is a compressor hardware fault; if the current signal, voltage signal, and chip temperature of the compressor are not included in the abnormal signals, determining that the fault type of the air conditioner is the non-compressor hardware fault.

6. The method according to any one of claims 1 to 5, characterized in that, the non-compressor hardware fault includes a suction and exhaust system fault of the compressor, wherein if at least one of the suction and exhaust pressure and suction and exhaust temperature of the compressor is included in the abnormal signals, the abnormal signals indicate a suction and exhaust system fault of the compressor.

7. The method according to any one of claims 1 to 6, characterized in that, the method further includes: when the fault type of the air conditioner is a compressor hardware fault, stopping the compressor from working; performing different ventilation operations on the air conditioner according to the working mode of the compressor before the compressor stops working, and the working mode of the compressor includes a refrigeration mode and a heating mode.

8. The method according to any one of claims 1 to 7, characterized in that, the method further includes: displaying fault information on a display device of a vehicle.

9. A controller, characterized in that, it includes: an obtaining module for obtaining the fault type of the air conditioner; the obtaining module is configured to, when the fault type of the air conditioner is a non-compressor hardware fault, obtain target operating parameters matching the operating state from a preset database; a control module for further controlling the operation of the air conditioner according to the target operating parameters.

10. An electronic device, characterized in that, Comprising a memory and a processor, the memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to implement the method according to any one of claims 1 to 8.

11. An air conditioning system, characterized in that it comprises a compressor and the controller according to claim 9, or it comprises the compressor and the electronic device according to claim 10.

12. A vehicle, characterized in that it comprises the controller according to claim 9, or the electronic device according to claim 10, or the air conditioning system according to claim 11.

13. A readable storage medium, characterized in that it comprises program instructions, and when the program instructions are executed by a controller, the controller is caused to execute the method according to any one of claims 1 to 8.

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