Air conditioning control method, device, equipment and storage medium

Abstract

The present application provides an air conditioning control method, device, equipment and storage medium, which relates to the field of automobile air conditioning technology. It aims to improve the current situation of frequent start and stop of the compressor while ensuring that the air conditioning refrigeration meets the comfort requirements of the vehicle to the maximum extent. While the air conditioning compressor is in operation, the number of times the parameter values ​​of the components in the air conditioner are abnormal is counted; the parameter value includes the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation where the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period; when the number is not less than the preset number and the parameter value is the evaporator surface temperature, the opening of the circulation damper is adjusted to the target opening; the target opening is determined according to the temperature range of the vehicle cabin temperature.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air-conditioning, and in particular to an air-conditioning control method, device, equipment and storage medium. Background Art

[0002] A car is a relatively closed means of transport for people, and the space inside the car is relatively small, so it needs to rely on air conditioning for heat dissipation. Due to global warming, the ambient temperature is increasing, and the temperature inside the car is also getting higher and higher. However, people's demand for riding comfort has not decreased, which leads to higher and higher requirements for the cooling effect of car air conditioning.

[0003] In order to provide a comfortable riding experience, most users currently choose to turn on the air conditioner to the maximum to force the car to cool down, which results in excessive wear and tear on the air conditioner compressor. To improve the above situation, related technologies control the air conditioner compressor to temporarily stop working when the air conditioner system is overloaded. However, frequent start and stop of the air conditioner compressor will seriously affect its lifespan. Summary of the invention

[0004] The embodiments of the present application provide an air-conditioning control method, device, equipment and storage medium, which aim to improve the current situation of frequent starting and stopping of the compressor while ensuring that the air-conditioning refrigeration meets the comfort requirements of the vehicle to the greatest extent.

[0005] A first aspect of an embodiment of the present application provides an air conditioning control method, which is applied to an air conditioning controller. The method includes:

[0006] During the period when the air conditioner compressor is in the working state, the number of times the parameter values ​​of the components in the air conditioner are abnormal is counted; the parameter values ​​include the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation that the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period;

[0007] When the number is not less than a preset number and the parameter value is the evaporator surface temperature, the opening of the circulation damper is adjusted to a target opening; the target opening is determined according to a temperature range of a vehicle cabin temperature. Optionally, the parameter value also includes an air conditioning system pressure, and the method further includes:

[0008] When the number is not less than the preset number and the parameter value is the air-conditioning system pressure, the air-conditioning compressor is controlled to stop working.

[0009] Optionally, when the number is not less than the preset number and the parameter value is the evaporator surface temperature, the method further includes:

[0010] Adjust the opening of the circulation damper to the opening that meets the evaporator temperature dissipation conditions.

[0011] Optionally, the parameter value includes at least one of air conditioning system pressure and evaporator surface temperature; the method further includes:

[0012] Initialize the counter to zero;

[0013] The number of times the parameter value is abnormal is counted, including:

[0014] Each time an abnormality is detected in the parameter value, the counter is incremented by one;

[0015] After each increment operation is performed on the counter, if no abnormality occurs to the parameter value within a preset time period after the increment operation is performed on the counter, a decrement operation is performed on the counter.

[0016] Optionally, when the number is not less than the preset number and the parameter value is the air conditioning system pressure, the method further includes:

[0017] The multimedia display screen is controlled via the CAN network to display abnormal air conditioning system pressure fault.

[0018] Optionally, adjusting the opening of the circulation damper to a target opening includes:

[0019] Reading the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature;

[0020] Determining a target opening corresponding to an evaporator temperature dissipation condition according to a temperature range of the vehicle cabin temperature;

[0021] The opening of the circulation damper is adjusted to the target opening.

[0022] Optionally, the method further comprises:

[0023] Reading the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature;

[0024] When the vehicle cabin temperature is greater than a preset temperature, or when a user instruction is received, the opening of the circulating damper is reset and the number is set to zero, wherein the user instruction includes any one of the following: an instruction to change the air conditioning mode, an instruction to change the circulating damper mode, an instruction to change the circulating damper gear, and an instruction to turn off the air conditioning cooling mode.

[0025] Optionally, when the number is not less than the preset number and the parameter value is the air conditioning system pressure, controlling the air conditioning compressor to stop working includes:

[0026] A stop cooling mode signal is sent to an engine controller through a wiring harness, so that the engine controller controls the compressor to stop working.

[0027] A second aspect of an embodiment of the present application provides an air conditioning control device, located in an air conditioning controller, the device comprising:

[0028] A statistical module, for counting the number of times when the parameter values ​​of the components in the air conditioner are abnormal while the air conditioner compressor is in the working state; the parameter value includes the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation where the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period;

[0029] The regulating module is used to regulate the opening of the circulation damper to a target opening when the number is not less than a preset number and the parameter value is the evaporator surface temperature; the target opening is determined according to the temperature range of the vehicle cabin temperature.

[0030] Optionally, the parameter value also includes air conditioning system pressure, and the device further includes:

[0031] A control module, configured to control the air conditioning compressor to stop working when the number of times is not less than the preset number of times and the parameter value is the air conditioning system pressure

[0032] Optionally, the device further comprises:

[0033] The regulating module is used to adjust the opening of the circulation damper to an opening corresponding to the evaporator temperature dissipation condition.

[0034] Optionally, the device further comprises:

[0035] An initialization module, used to initialize the counter to zero;

[0036] The statistics module includes:

[0037] A first operation submodule, configured to add one to the counter each time an abnormality is detected in the parameter value;

[0038] The second operation submodule is used to perform a subtraction operation on the counter after each increment operation is performed on the counter, if the parameter value does not become abnormal within a preset time period after the increment operation is performed on the counter.

[0039] Optionally, the device further comprises:

[0040] The display module is used to control the multimedia display screen to display abnormal pressure faults of the air-conditioning system through the CAN network.

[0041] Optionally, the adjustment module includes:

[0042] A reading submodule, used to read the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature;

[0043] A determination submodule, used to determine a target opening corresponding to the evaporator heat dissipation condition according to the temperature range of the current temperature value;

[0044] The regulating submodule is used to regulate the opening of the circulating air door to the target opening.

[0045] Optionally, the device further comprises:

[0046] A reading module, used to read the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature;

[0047] The zeroing module is used to reset the opening of the circulating damper and reset the number to zero when the vehicle cabin temperature is greater than a preset temperature or a user instruction is received, wherein the user instruction includes any of the following: an instruction to change the air conditioning mode, an instruction to change the circulating damper mode, an instruction to change the circulating damper gear, and an instruction to turn off the air conditioning cooling mode.

[0048] Optionally, the control module includes:

[0049] The sending submodule is used to send a stop cooling mode signal to the engine controller through the wiring harness, so that the engine controller controls the compressor to stop working.

[0050] A third aspect of an embodiment of the present application provides a readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps in the method described in the first aspect of the present application are implemented.

[0051] A fourth aspect of an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in the first aspect of the present application are implemented.

[0052] When the air conditioner is running, the embodiment of the present application continuously monitors the parameter values ​​of the air conditioner internal components that may cause the compressor to automatically start and stop, such as the air conditioning system pressure and the evaporator surface temperature; the number of times the parameter value is abnormal is counted, and when the statistical number of times the parameter value is abnormal does not reach the preset number, the compressor is controlled to remain in operation. By limiting the conditions for the automatic suspension of the compressor in the above manner, the frequent start and stop of the compressor caused by faults or operating conditions during vehicle operation is avoided, thereby extending the service life of the compressor.

[0053] In addition, in the embodiment of the present application, when the statistical number of abnormal parameter values ​​reaches a preset number, the protection strategy for abnormal changes in air-conditioning system pressure and the protection strategy for abnormal changes in evaporator surface temperature are respectively activated. According to the actual cause of the abnormal change in air-conditioning system pressure, which is a vehicle failure, the compressor is controlled to stop working and the compressor is no longer automatically started to protect the compressor from the impact of vehicle failure. According to the actual cause of the abnormal evaporator surface temperature, which is the vehicle operating state, the circulating damper is controlled to open to allow natural wind from the outside to enter the vehicle cabin to form mixed wind and improve the evaporator surface temperature so as not to affect the user's riding experience during vehicle operation, and to maintain the compressor in a working state without frequent start and stop, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0055] Figure 1 is a schematic diagram of the structure of a compressor control system according to an embodiment of the present application;

[0056] Figure 2 is a flowchart of the steps of the air conditioning control method of an embodiment of the present application;

[0057] Figure 3A This is a first flow chart of the air conditioning control method according to an embodiment of the present application;

[0058] Figure 3B is a second flow chart of the air conditioning control method according to an embodiment of the present application;

[0059] Figure 4 It is a structural schematic diagram of the air conditioning control solution device proposed in the embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] Under existing technology, most vehicles monitor the temperature inside the car through sensors. When the temperature inside the car is too high, high-efficiency refrigeration is used to reduce the temperature inside the car. However, high-efficiency refrigeration is mainly achieved by the air-conditioning compressor working for a long time, which causes excessive wear and tear on the air-conditioning compressor.

[0062] In order to reduce the loss of the air-conditioning compressor, the relevant technology protects the air-conditioning compressor through the following two measures: 1. When the air-conditioning system pressure exceeds 3.14MPa or is lower than 0.196MPa, the air-conditioning controller controls the air-conditioning compressor clutch to disengage, so that the air-conditioning compressor temporarily stops working. 2. When the evaporator surface temperature of the air-conditioning system is lower than 2°C, the air-conditioning controller controls the air-conditioning compressor clutch to disengage, so that the air-conditioning compressor temporarily stops working.

[0063] The applicant has found that the above-mentioned prior art for avoiding excessive loss of air-conditioning compressors has the following shortcomings: 1. In the case of poor heat dissipation or failure, such as poor ventilation in the engine compartment of a car, failure of the engine cooling system, etc.; since the air-conditioning condenser cannot effectively dissipate heat, the pressure of the air-conditioning system will increase abnormally. Under such working conditions, the compressor will start and stop frequently, affecting the life of the compressor. 2. When the air-conditioning system is running at high speed, the cooling capacity of the air-conditioning system is large, and the surface temperature of the evaporator will be lower than 2°C. At this time, the air-conditioning controller controls the air-conditioning compressor to temporarily stop working according to the surface temperature of the evaporator. The evaporator surface temperature will rise rapidly, which will cause the air-conditioning compressor to start and stop frequently, affecting the life of the compressor.

[0064] In view of the above problems, the embodiment of the present application proposes an air-conditioning control method, which sets control conditions for the objective reasons that affect the frequent start and stop of the compressor, adds fault judgment for the high and low pressure exceeding the limit values ​​of the compressor, and adopts a corresponding fault strategy response method when the high and low pressure exceeding the limit values ​​of the compressor occurs, so that the air-conditioning compressor is not affected by the accidental changes in parameters caused by objective reasons, and still maintains a working state, so as to avoid frequent start and stop of the compressor.

[0065] Figure 1 Schematic diagram of the structure of the compressor control system of the present application embodiment. Figure 1 As shown, the air conditioning control method is applied to the air conditioning controller. In order to better execute the air conditioning control method, the following is set Figure 1 The connection relationship of the air conditioning controller.

[0066] The compressor control system includes: an air conditioning controller 11, an indoor temperature sensor 12, a pressure switch 13, a circulating damper 14, an evaporator temperature sensor 15, an engine controller 16, an air conditioning compressor 17, and a multimedia display screen 18. The air conditioning controller 11 is connected to the indoor temperature sensor 12, the pressure switch 13, the circulating damper 14, the evaporator temperature sensor 15, and the engine controller 16 through a wiring harness. The air conditioning controller 11 is connected to the air conditioning compressor 17 and the multimedia display screen 18 through a CAN bus.

[0067] The compressor control system is integrated into the air-conditioning controller as a part of the air-conditioning controller control, and executes the air-conditioning control method proposed in this application to automatically identify the frequent start and stop of the compressor and start the protection strategy.

[0068] The present application discloses in detail through the following embodiments a method for automatically identifying frequent starts and stops of a compressor and initiating a protection strategy by cooperating with various components of a compressor control system.

[0069] Figure 2 is a flow chart of the steps of the air conditioning control method of the embodiment of the present application, such as Figure 2 As shown, the steps are as follows:

[0070] Step S21: While the air-conditioning compressor is in operation, the number of times that the parameter values ​​of the components in the air-conditioning are abnormal is counted; the parameter values ​​include the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation where the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period.

[0071] The period when the air conditioner compressor is in working state means that after the air conditioner turns on the cooling mode, the compressor remains in working state.

[0072] The preset time can be set according to the vehicle's hardware status or performance. Assuming the preset time is 10 seconds, the limit is 3.14Mpa, and exceeding the limit is greater than 3.14Mpa, then the parameter value abnormality means that the parameter value is greater than 3.14Mpa and then returns to a value less than or equal to 3.14Mpa within 10 seconds.

[0073] Step S22: When the number is not less than a preset number and the parameter value is the evaporator surface temperature, the opening of the circulation damper is adjusted to a target opening; the target opening is determined according to the temperature range of the vehicle cabin temperature.

[0074] In the embodiment of the present application, after the air conditioner is turned on, the air conditioner controller automatically monitors the parameter values ​​of the components inside the air conditioner, that is, monitors the surface temperature of the evaporator, and detects the change of the surface temperature of the evaporator. If the change of the surface temperature of the evaporator is normal, for example, the surface temperature of the evaporator changes within the limit, the surface temperature of the evaporator does not increase or decrease significantly, etc., the air conditioner controller continues to monitor the parameter values ​​of the components inside the air conditioner, and does not change the working state of the air conditioner compressor. If the number of abnormalities in the surface temperature of the evaporator does not exceed the preset number, the working state of the air conditioner compressor is not changed, thereby avoiding the situation where the compressor stops working directly due to abnormal changes in the parameter values ​​of the air conditioner components due to special conditions such as poor heat dissipation and high-speed driving, so that the compressor will not start and stop frequently. When the number of abnormalities in the surface temperature of the evaporator exceeds the preset number, the opening of the circulation damper is adjusted to the target opening that can ensure sufficient heat dissipation of the evaporator according to the vehicle cabin temperature, forming a mixed wind.

[0075] Another embodiment of the present application specifically shows that the parameter value includes at least one of the air conditioning system pressure and the evaporator surface temperature.

[0076] The limit values ​​of the air-conditioning system pressure are 3.14Mpa and 0.196Mpa. When the parameter value is the air-conditioning system pressure, an abnormal parameter value means that after the air-conditioning system pressure is greater than 3.14Mpa, it automatically returns to the pressure range of 0.196Mpa to 3.14Mpa within the preset time; or after the air-conditioning system pressure is less than 0.196Mpa, it automatically returns to the pressure range of 0.196Mpa to 3.14Mpa within the preset time.

[0077] The limit value of the evaporator surface temperature is 2 degrees Celsius. When the parameter value is the evaporator surface temperature, an abnormal parameter value means that after the evaporator surface temperature is less than 2 degrees Celsius, it automatically returns to a range greater than or equal to 2 degrees Celsius within a preset time.

[0078] Another embodiment of the present application further limits the measures to be taken when the parameter value is the air-conditioning system pressure and the number of times the parameter value is abnormal exceeds a preset number. Specifically, when the number is not less than the preset number and the parameter value is the air-conditioning system pressure, the air-conditioning compressor is controlled to stop working.

[0079] When the counted number of abnormal pressure occurrences in the air-conditioning system is not less than a preset number, the air-conditioning controller controls the air-conditioning compressor to stop working, which means that the air-conditioning compressor is powered off, and the air-conditioning compressor will not automatically start without receiving a start command.

[0080] When the number is not less than the preset number and the parameter value is the air-conditioning system pressure, the air-conditioning compressor is controlled to stop working, including: sending a stop cooling mode signal to the engine controller through the wiring harness, so that the engine controller controls the compressor to stop working.

[0081] The air conditioning controller controls the air conditioning compressor to stop working, which can be specifically executed in the following way: the air conditioning controller sends a stop cooling mode signal to the engine controller through the wiring harness, and the engine controller controls the compressor to stop working. The objective reasons that lead to abnormal air conditioning system pressure will not disappear in a short time, that is, the poor ventilation of the car engine compartment, or the car engine cooling system failure will not be eliminated without reason. Therefore, the air conditioning controller controls the compressor to stop working, avoiding the frequent start and stop of the compressor under the influence of external faults.

[0082] When the number of abnormal air-conditioning system pressure counted is not less than the preset number, the air-conditioning controller will also control the multimedia display screen through the CAN network to display the abnormal air-conditioning system pressure fault, to remind the user that some components of the air-conditioning system have malfunctioned due to poor heat dissipation in the car's engine compartment and the parameter values ​​have changed abnormally. The user is warned to check the heat dissipation environment of the engine compartment when the vehicle is stopped.

[0083] The method for the air conditioning controller to obtain the pressure of the air conditioning system can be to set a pressure sensor in the condenser or evaporator and other components in the air conditioning system, the pressure sensor continuously monitors the pressure value of the condenser or evaporator and other components, and sends the pressure value to the air conditioning controller through the pressure switch, and the pressure switch converts the pressure value into an electrical signal, and converts the pressure value within the range of 3.14Mpa and 0.196Mpa into a high-frequency electrical signal, and converts the pressure value not within the range of 3.14Mpa and 0.196Mpa into a low-frequency signal. The air conditioning controller can determine whether the pressure of the air conditioning system is abnormal based on the acquired electrical signal.

[0084] When the counted number of abnormal evaporator surface temperature occurrences is not less than the preset number, the air-conditioning controller controls the air-conditioning compressor to continue to keep working because the abnormal evaporator surface temperature is caused by high-speed driving of the vehicle, which is a normal state for the vehicle. In addition, vehicles traveling at high speeds require air-conditioning for cooling to meet the user's needs for a comfortable ride. Therefore, in order to prevent the compressor from temporarily stopping working when the evaporator surface temperature is lower than the limit due to efficient cooling when the vehicle is driving at high speed, the air-conditioning compressor is controlled to always keep working, which not only meets the user's comfortable ride experience but also protects the compressor.

[0085] The air conditioning controller may obtain the evaporator surface temperature in a method whereby an evaporator temperature sensor monitors the evaporation surface temperature of the system and sends the evaporation surface temperature to the air conditioning controller.

[0086] When the counted number of abnormal evaporator surface temperature occurrences is not less than a preset number, the air conditioning controller will also adjust the opening of the circulating air door to an opening corresponding to the evaporator temperature dissipation condition, so that outside wind can enter the vehicle cabin, thereby reducing the evaporator surface temperature and avoiding abnormal evaporator surface temperature.

[0087] Another embodiment of the present application shows a method for adjusting the opening of the circulation damper. The value currently displayed by the indoor temperature sensor is read to obtain the vehicle cabin temperature; according to the temperature range of the vehicle cabin temperature, a target opening corresponding to the evaporator heat dissipation condition is determined; the opening of the circulation damper is adjusted to the target opening to form a mixed wind in the vehicle cabin.

[0088] The air conditioning controller can obtain the current temperature value of the vehicle cabin based on the indoor temperature value fed back by the indoor temperature sensor.

[0089] The temperature range includes: a range less than or equal to 22 degrees Celsius, a range greater than 22 degrees Celsius and less than 27 degrees Celsius, and a range greater than 27 degrees Celsius.

[0090] When the current temperature is less than or equal to 22 degrees Celsius, the air conditioning controller determines the target opening of the circulating air door to be 10%. The mixed wind formed by the outside natural wind entering with the circulating air door opened at 10% and the air-conditioned wind can cool the evaporator surface temperature and control excessive energy consumption.

[0091] When the current temperature value is greater than 22 degrees Celsius and less than 27 degrees Celsius, the air-conditioning controller determines that the target opening of the circulating air damper is 15%; when the current temperature value is greater than 27 degrees Celsius, the air-conditioning controller determines that the target opening of the circulating air damper is the original opening of the circulating air damper. The original opening refers to the opening value of the circulating air damper before the air-conditioning controller executes the air-conditioning control method proposed in the embodiment of the present application. After the temperature of the vehicle cabin gradually rises to 27 degrees Celsius due to the influence of the mixed wind, the surface temperature of the evaporator is no longer lower than the limit value. At this time, it is necessary to restore the original opening of the circulating air damper and re-count the number of abnormalities on the surface temperature of the evaporator, that is, restart a new round of adjusting the working state of the compressor according to the abnormal changes in the parameter values.

[0092] In the embodiment of the present application, when the evaporator surface temperature is abnormal, the circulating air door opening is adjusted to allow external natural wind to enter the vehicle cabin, and the cabin temperature is gradually adjusted to dissipate heat and cool the evaporator surface. When the evaporator surface temperature no longer has the conditions for abnormality, the evaporator surface temperature is re-judged to form a dynamic cycle adjustment process, thereby ensuring that the air-conditioning compressor remains in a working state during high-speed driving of the vehicle, and saving energy consumption through the dynamic cycle adjustment process, thereby balancing the cost of the entire vehicle.

[0093] Another embodiment of the present application shows another method for adjusting the opening of the circulation damper. The value currently displayed by the indoor temperature sensor is read to obtain the vehicle cabin temperature; when the vehicle cabin temperature is greater than a preset temperature or a user instruction is received, the opening of the circulation damper is reset and the number is set to zero, wherein the user instruction includes any of the following: an instruction to change the air conditioning mode, an instruction to change the circulation damper mode, an instruction to change the circulation damper gear position, and an instruction to turn off the air conditioning cooling mode.

[0094] User instructions such as the instruction to change the air conditioning mode, the instruction to change the circulating damper mode, the instruction to change the circulating damper gear, and the instruction to turn off the air conditioning cooling mode reflect user needs; when the current temperature value is greater than the preset temperature, the temperature of the cabin is high, and the user's comfort experience may not be satisfied; another method for adjusting the opening of the circulating damper proposed in the embodiment of the present application can readjust the cooling mode according to the needs indicated by the user upon receiving the user's instruction to meet the user's riding experience. It can also automatically restore the opening of the circulating damper to lower the cabin temperature when the vehicle cabin temperature is high, and automatically re-detect the evaporator surface temperature when cabin conditions such as the air conditioning mode, changing the circulating damper mode, and changing the circulating damper gear change, and have the function of intelligent conditions.

[0095] Figure 3A This is the first flow chart of the air conditioning control method of the embodiment of the present application. When the air conditioning is turned on, the air conditioning controller follows the following steps: Figure 3A The flowchart shown in the figure is run, and the relevant operations are performed according to the number of times the evaporator surface temperature is abnormal, so as to ensure that the air conditioning compressor will not start and stop frequently; Figure 3B This is a second flow chart of the air conditioning control method of the present application embodiment. When the air conditioning is turned on, the air conditioning controller follows the following steps: Figure 3BThe flowchart shown in the figure is run, and the relevant operations are performed according to the number of abnormal pressure occurrences in the air conditioning system to ensure that the air conditioning compressor will not start and stop frequently. A counter is set locally, and the counter is initialized to zero after each restart of the air conditioner. Each time an abnormality is detected in the parameter value, the counter is incremented by one. After each increment operation on the counter, if the parameter value does not become abnormal within a preset time period after the counter is incremented by one, the counter is decremented by one.

[0096] The counters include an abnormal pressure counter and a low evaporator temperature counter. The abnormal pressure counter and the low evaporator temperature counter have the same working principle. When an abnormal parameter value occurs, the local counter is incremented by one. If no abnormal parameter value is detected again within the preset time after the increment operation, the local counter is decremented by one.

[0097] The embodiment of the present application sets a counter locally, and through simple addition and subtraction operations on the counter, counts each occurrence of abnormal parameter values ​​and misjudgments of abnormal parameter values, thereby accurately counting the number of times the parameter values ​​are abnormal, providing a reliable basis for the air-conditioning controller to monitor abnormal conditions of the air-conditioning system and respond to compressor protection measures in response to abnormal conditions of the air-conditioning system.

[0098] For example, assume that the basis for determining whether to decrement the counter is that the preset time period is 30 seconds, the basis for determining whether the parameter value is abnormal is that the preset time length is 10 seconds, the upper limit value of the air-conditioning system pressure is 3.14Mpa, the lower limit value of the air-conditioning system pressure is 0.196Mpa, the limit value of the evaporator surface temperature is 2 degrees Celsius, and the preset number of times is 20 times.

[0099] The specific steps for the air conditioning controller to monitor the air conditioning system pressure, identify abnormal air conditioning system pressure, and respond to the air conditioning compressor protection measures according to the abnormal air conditioning system pressure are as follows:

[0100] The air conditioning controller first clears the last count of the abnormal pressure counter, and then monitors the abnormal pressure of the air conditioning system through the pressure switch, that is, monitors whether the pressure of the air conditioning system exceeds 3.14Mpa, or is less than 0.196Mpa, and then recovers to the pressure range of 0.196Mpa to 3.14Mpa within 10 seconds. If the above situation occurs, it means that the pressure of the air conditioning system is abnormal; after determining that the pressure of the air conditioning system is abnormal, the air conditioning controller adds one to the abnormal pressure counter of the air conditioning; if the value of the abnormal pressure counter does not reach the preset number of times, 20 times, the air conditioning controller continues to monitor the pressure of the air conditioning system through the pressure switch. An abnormal situation occurs; during the monitoring process, if no new pressure abnormality occurs within the preset time period from the last pressure abnormality, that is, 30 seconds from the last pressure abnormality, the air-conditioning controller decrements the pressure abnormality counter by one (when the counter value is "0", the subtraction operation is not performed); if the pressure abnormality counter value reaches the preset number of times, 20 times, the air-conditioning controller activates the air-conditioning system pressure abnormality response strategy, and the air-conditioning controller sends a signal to stop the cooling mode to the engine controller through the wiring harness, and the engine controller controls the compressor to stop working; the air-conditioning controller then requests the multimedia display screen to display the air-conditioning system pressure abnormality fault to the user through the CAN network.

[0101] The specific steps for the air conditioning controller to monitor the evaporator surface temperature, identify abnormal evaporator surface temperature, and respond to the air conditioning compressor protection measures according to the abnormal evaporator surface temperature are as follows:

[0102] The air conditioning controller first resets the last count of the evaporator temperature too low counter to zero, and then monitors the evaporator surface temperature of the system through the evaporator temperature sensor. If the evaporator temperature is too low and then returns to normal, that is, the evaporator surface temperature is lower than 2 degrees Celsius and then recovers to a temperature greater than 2 degrees Celsius within 10 seconds, it is determined that the evaporator surface temperature is abnormal, and the evaporator temperature too low counter is increased by one; if the evaporator temperature too low counter value does not reach the preset number of times, 20 times, the air conditioning controller continues to monitor the abnormality of the evaporator surface temperature; during the monitoring process, if no new evaporator surface temperature abnormality occurs within 30 seconds after the last evaporator surface temperature abnormality, the evaporator temperature too low counter is reduced by one (when the counter value is "0", the subtraction operation is not performed); if the evaporator temperature too low counter value reaches the preset number of times, 20 times, the air conditioning controller will start the evaporator temperature too low response strategy, and the air conditioning controller will control the circulation damper (7) to open different circulation damper openings according to the indoor temperature value fed back by the indoor temperature sensor to form a mixed wind, specifically:

[0103] When the indoor ambient temperature is ≤22℃, open the circulation damper 15% (0% is full indoor air circulation, 100% is full outdoor air circulation)

[0104] When the indoor ambient temperature is 22℃<27℃, open the circulation damper 10%;

[0105] When the indoor ambient temperature is ≥27℃, and the air conditioning controller receives an instruction to change the air conditioning blowing mode, or receives an instruction to change the internal and external circulation damper mode, or receives an instruction to change the air volume gear, or receives an instruction to turn off the cooling mode, the air conditioning controller will restore the circulation damper to the opening before the response strategy is started, and clear the evaporator low temperature counter; the air conditioning controller begins to re-count the number of abnormal evaporator surface temperature occurrences.

[0106] When the air conditioner is running, the embodiment of the present application continuously monitors the parameter values ​​of the air conditioner internal components that may cause the compressor to automatically start and stop, such as the air conditioning system pressure and the evaporator surface temperature; the number of times the parameter value is abnormal is counted, and when the statistical number of times the parameter value is abnormal does not reach the preset number, the compressor is controlled to remain in operation. By limiting the conditions for the automatic suspension of the compressor in the above manner, the frequent start and stop of the compressor caused by faults or operating conditions during vehicle operation is avoided, thereby extending the service life of the compressor.

[0107] In addition, in the embodiment of the present application, when the statistical number of abnormal parameter values ​​reaches a preset number, the protection strategy for abnormal changes in air-conditioning system pressure and the protection strategy for abnormal changes in evaporator surface temperature are respectively activated. According to the actual cause of the abnormal change in air-conditioning system pressure, which is a vehicle failure, the compressor is controlled to stop working and the compressor is no longer automatically started to protect the compressor from the impact of vehicle failure. According to the actual cause of the abnormal evaporator surface temperature, which is the vehicle operating state, the circulating damper is controlled to open to allow natural wind from the outside to enter the vehicle cabin, improve the evaporator surface temperature, so as not to affect the user's riding experience during vehicle operation, and maintain the compressor in a working state, without frequent start and stop, to extend its service life.

[0108] Based on the same inventive concept, the present application embodiment provides an air conditioning control device. Figure 4 , Figure 4 : is a schematic diagram of the structure of the air conditioning control device proposed in the embodiment of the present application. The device comprises:

[0109] The statistical module 41 is used to count the number of times when the parameter values ​​of the components in the air conditioner are abnormal while the air conditioner compressor is in the working state; the parameter value includes the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation that the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period;

[0110] The regulating module 42 is used to regulate the opening of the circulation damper to a target opening when the number is not less than a preset number and the parameter value is the evaporator surface temperature; the target opening is determined according to the temperature range of the vehicle cabin temperature.

[0111] Optionally, the parameter value also includes air conditioning system pressure, and the device further includes:

[0112] A control module, configured to control the air conditioning compressor to stop working when the number of times is not less than the preset number of times and the parameter value is the air conditioning system pressure

[0113] Optionally, the device further comprises:

[0114] The regulating module is used to adjust the opening of the circulation damper to an opening corresponding to the evaporator temperature dissipation condition.

[0115] Optionally, the device further comprises:

[0116] An initialization module, used to initialize the counter to zero;

[0117] The statistics module includes:

[0118] A first operation submodule, configured to add one to the counter each time an abnormality is detected in the parameter value;

[0119] The second operation submodule is used to perform a subtraction operation on the counter after each increment operation is performed on the counter, if the parameter value does not become abnormal within a preset time period after the increment operation is performed on the counter.

[0120] Optionally, the device further comprises:

[0121] The display module is used to control the multimedia display screen to display abnormal pressure faults of the air-conditioning system through the CAN network.

[0122] Optionally, the adjustment module includes:

[0123] A reading submodule, used to read the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature;

[0124] A determination submodule, used to determine a target opening corresponding to the evaporator heat dissipation condition according to the temperature range of the current temperature value;

[0125] The regulating submodule is used to regulate the opening of the circulating air door to the target opening.

[0126] Optionally, the device further comprises:

[0127] A reading module, used to read the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature;

[0128] The zeroing module is used to reset the opening of the circulating damper and reset the number to zero when the vehicle cabin temperature is greater than a preset temperature or a user instruction is received, wherein the user instruction includes any of the following: an instruction to change the air conditioning mode, an instruction to change the circulating damper mode, an instruction to change the circulating damper gear, and an instruction to turn off the air conditioning cooling mode.

[0129] Optionally, the control module includes:

[0130] The sending submodule is used to send a stop cooling mode signal to the engine controller through the wiring harness, so that the engine controller controls the compressor to stop working.

[0131] Based on the same inventive concept, another embodiment of the present application provides a readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the air conditioning control method described in any of the above embodiments of the present application are implemented.

[0132] Based on the same inventive concept, another embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executed, implements the steps of the air conditioning control method described in any of the above embodiments of the present application.

[0133] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0134] Each embodiment in this specification is described in a progressive or illustrative manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.

[0135] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, devices, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0136] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, apparatuses, and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0137] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0138] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0139] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0140] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0141] The above is a detailed introduction to the air conditioning control method, device, equipment and storage medium provided by the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An air conditioning control method, characterized in that: Applied to an air conditioning controller, the method comprises: During the period when the air conditioner compressor is in the working state, the number of times the parameter values ​​of the components in the air conditioner are abnormal is counted; the parameter values ​​include the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation that the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period; Initialize the counter to zero; count the number of times the parameter value is abnormal, including: Each time an abnormality is detected in the parameter value, the counter is incremented by one; After each increment operation is performed on the counter, if the parameter value does not become abnormal within a preset time period after the increment operation is performed on the counter, the counter is decremented; When the number is not less than the preset number and the parameter value is the evaporator surface temperature, the opening of the circulation damper is adjusted to a target opening; the target opening is determined according to the temperature range of the vehicle cabin temperature.

2. The method according to claim 1, characterized in that: The parameter value also includes air conditioning system pressure, and the method further includes: When the number is not less than the preset number and the parameter value is the air-conditioning system pressure, the air-conditioning compressor is controlled to stop working.

3. The method according to claim 2, characterized in that When the number is not less than the preset number and the parameter value is the air conditioning system pressure, the method further includes: The multimedia display screen is controlled via the CAN network to display abnormal air conditioning system pressure fault.

4. The method according to claim 1, characterized in that: Adjust the opening of the circulation damper to the target opening, including: Reading the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature; Determining a target opening corresponding to an evaporator temperature dissipation condition according to a temperature range of the vehicle cabin temperature; The opening of the circulation damper is adjusted to the target opening.

5. The method according to claim 1, characterized in that The method further comprises: Reading the value currently displayed by the indoor temperature sensor to obtain the vehicle cabin temperature; When the vehicle cabin temperature is greater than a preset temperature, or when a user instruction is received, the opening of the circulating damper is reset and the number is set to zero, wherein the user instruction includes any one of the following: an instruction to change the air conditioning mode, an instruction to change the circulating damper mode, an instruction to change the circulating damper gear, and an instruction to turn off the air conditioning cooling mode.

6. The method according to claim 2, characterized in that When the number of times is not less than the preset number of times and the parameter value is the air conditioning system pressure, controlling the air conditioning compressor to stop working includes: A stop cooling mode signal is sent to an engine controller through a wiring harness, so that the engine controller controls the compressor to stop working.

7. An air conditioning control device, characterized in that: The device comprises: A statistical module, for counting the number of times when the parameter values ​​of the components in the air conditioner are abnormal while the air conditioner compressor is in the working state; the parameter value includes the evaporator surface temperature; wherein the abnormality of the parameter value refers to the situation where the parameter value exceeds the limit value and then automatically recovers to not exceed the limit value within a preset time period; An initialization module, used to initialize the counter to zero; The statistics module includes: A first operation submodule, configured to add one to the counter each time an abnormality is detected in the parameter value; A second operation submodule is used for, after each increment operation is performed on the counter, if the parameter value does not become abnormal within a preset time period after the increment operation is performed on the counter, decrementing the counter; The regulating module is used to regulate the opening of the circulation damper to a target opening when the number is not less than a preset number and the parameter value is the evaporator surface temperature; the target opening is determined according to the temperature range of the vehicle cabin temperature.

8. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in any one of the methods according to claims 1 to 6 are implemented.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When executed, the processor implements the steps of the method according to any one of claims 1 to 6.

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