Control method of air conditioning system, air conditioning system, device, storage medium and product

Abstract

The application provides a control method of an air conditioning system, an air conditioning system, a device, a storage medium and a product. The air conditioning system at least comprises a first air conditioner and a second air conditioner. The first air conditioner is arranged at a position corresponding to a first seat row in a passenger cabin of a vehicle, and the second air conditioner is arranged at a position corresponding to a second seat row in the passenger cabin of the vehicle. The method comprises the following steps: acquiring an occupancy state signal of each seat in the first seat row; acquiring an operating load of the second air conditioner under the condition that all the occupancy state signals are unoccupied and the first air conditioner is turned on; acquiring the operating load of the first air conditioner and changing the operating state of the first air conditioner to a blowing state under the condition that the operating load of the second air conditioner is greater than a preset threshold; and adjusting the operating power and the air outlet temperature of the second air conditioner based on the operating load of the first air conditioner. Thus, the overall system invalid energy consumption is effectively reduced, the temperature control capability of a high demand area is improved, and the overall comfort of the passenger cabin is ensured.

Description

Technical Field

[0001] This application relates to the field of vehicle engineering technology, and in particular to a control method, air conditioning system, device, storage medium and product for an air conditioning system. Background Technology

[0002] Currently, multi-occupancy vehicles generally use a three-zone automatic climate control system. This system utilizes a distributed architecture of front and rear air conditioning units, and through coordinated control by the vehicle's overall air conditioning controller, it enables independent adjustment of temperature, airflow, and mode for the driver's area, front passenger area, and rear passenger area. However, when both front and rear air conditioning units are operating simultaneously, the vehicle's cooling or heating energy consumption is significantly higher than when only one air conditioning unit is running.

[0003] During normal driving, the rear passenger compartment is often unoccupied. Furthermore, because the front and rear air conditioning controls are located in separate areas on some models, drivers easily overlook the rear air conditioning's status, causing it to continue operating unnecessarily for extended periods even when unoccupied, increasing overall vehicle energy consumption. To address this issue, current technology typically shuts off the rear air conditioning or corresponding vents when no one is detected in the rear. However, when the front cooling or heating load is high, directly cutting off the rear air conditioning can create a temperature difference between the unoccupied area and other areas, affecting the overall cooling or heating rate of the cabin. This can easily lead to a rebound in front cabin temperature or over-temperature control, compromising overall cabin comfort while reducing the vehicle's air conditioning system's energy consumption. Summary of the Invention

[0004] This application provides a control method, air conditioning system, device, storage medium, and product for an air conditioning system, which can solve the technical problem in the prior art that the overall comfort of the passenger cabin cannot be guaranteed when reducing the energy consumption of the vehicle air conditioning system.

[0005] In a first aspect, this application provides a method for controlling an air conditioning system, the air conditioning system including at least a first air conditioner and a second air conditioner, the first air conditioner being installed at a position corresponding to a first row of seats in the passenger compartment of a vehicle, and the second air conditioner being installed at a position corresponding to a second row of seats in the passenger compartment of the vehicle; the method includes: Obtain the occupancy status signal of each seat in the first row; When all the aforementioned occupancy status signals are unoccupied and the first air conditioner is turned on, the operating load of the second air conditioner is obtained; If the operating load of the second air conditioner is greater than a preset threshold, the operating load of the first air conditioner is obtained and the operating status of the first air conditioner is changed to air supply status. Adjust the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner.

[0006] In some possible implementations, the method further includes: Upon receiving an operation signal from the user for the first air conditioner, the automatic control of the air conditioning system is stopped; When the automatic control of the air conditioning system stops and the first air conditioner is turned on, obtain the vehicle's status information; If the status information meets the preset activation conditions, the automatic control of the air conditioning system will be restarted.

[0007] In some possible implementations, the operating load is a cooling load, and the step of obtaining the operating load of the first air conditioner and changing the operating state of the first air conditioner to a fan-operating state when the operating load of the second air conditioner exceeds a preset threshold includes: If the cooling load of the second air conditioner is greater than the first preset threshold, obtain the cooling load of the first air conditioner; Change the operating status of the first air conditioner to air supply mode and shut down the cooling system of the first air conditioner.

[0008] In some possible implementations, adjusting the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner includes: Based on the cooling load of the first air conditioner, increase the compressor speed of the second air conditioner; Determine the corresponding cooling compensation value based on the cooling load of the first air conditioner; According to the cooling compensation value, the target air outlet temperature of the second air conditioner is reduced.

[0009] In some possible implementations, the operating load is a heating load, and the step of obtaining the operating load of the first air conditioner and changing the operating state of the first air conditioner to a fan-operating state when the operating load of the second air conditioner exceeds a preset threshold includes: If the heating load of the second air conditioner is greater than the second preset threshold, the heating load of the first air conditioner is obtained. Change the operating status of the first air conditioner to air supply mode and turn off the electric heater of the first air conditioner.

[0010] In some possible implementations, adjusting the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner includes: Based on the heating load of the first air conditioner, increase the power of the electric heater of the second air conditioner; The corresponding heating compensation value is determined based on the heating load of the first air conditioner; Increase the target air outlet temperature of the second air conditioner according to the heating compensation value.

[0011] In some possible implementations, after obtaining the operating load of the second air conditioner when all the occupancy status signals are unoccupied and the first air conditioner is on, the method further includes: When the operating load of the second air conditioner is less than or equal to a preset threshold, record the state duration of the state where the operating load is less than or equal to the preset threshold; If the state is maintained for a preset time threshold, the first air conditioner is turned off.

[0012] Secondly, this application provides an air conditioning system, which includes a controller, a compressor, a condenser, a first air conditioner, and a second air conditioner; The compressor is connected to the condenser via a refrigerant line, the condenser is connected to the second evaporator of the second air conditioner via a refrigerant line, the second evaporator of the second air conditioner is connected to the first evaporator of the first air conditioner via a refrigerant line, and the first evaporator of the first air conditioner is connected to the compressor via a refrigerant line. The controller is used to execute the control method of the air conditioning system as described above; The compressor is used to compress low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas. The condenser is used to cool and liquefy the high-temperature and high-pressure refrigerant gas, and transfer the heat in the refrigerant to the outside of the vehicle through heat exchange with the outside air. Thirdly, this application provides a control device for an air conditioning system, the air conditioning system including at least a first air conditioner and a second air conditioner, the first air conditioner being installed at a position corresponding to a first row of seats in the vehicle passenger compartment, and the second air conditioner being installed at a position corresponding to a second row of seats in the vehicle passenger compartment; the device includes: The acquisition module is used to acquire the occupancy status signal of each seat in the first row of seats; The judgment module is used to obtain the operating load of the second air conditioner when all the occupancy status signals are unoccupied and the first air conditioner is turned on. The module is used to obtain the operating load of the first air conditioner and change the operating state of the first air conditioner to the air supply state when the operating load of the second air conditioner is greater than a preset threshold. The adjustment module is used to adjust the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner.

[0013] Fourthly, this application provides a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the control method of the air conditioning system as described above.

[0014] Fifthly, this application provides a computer program product in which the instructions are executed by a processor of an electronic device, causing the electronic device to perform the control method of the air conditioning system as described above.

[0015] The air conditioning system control method, air conditioning system, device, storage medium, and product provided in this application embodiment, by confirming that all seats corresponding to the first air conditioner are unoccupied and the second air conditioner has a high operating load, changes the first air conditioner to air supply mode to reduce ineffective temperature control energy consumption in unoccupied areas, and simultaneously obtains the original operating load of the first air conditioner as an energy allocation benchmark, and dynamically adjusts the operating power and outlet air temperature of the second air conditioner accordingly. Since the occupancy status signals of all seats corresponding to the first air conditioner are unoccupied, it indicates that the first air conditioner is currently in an ineffective temperature control state with no actual demand. At this time, when the operating load of the second air conditioner is greater than a preset threshold, indicating a high temperature control demand, the system obtains the operating load of the first air conditioner and changes its operating state to air supply mode. This allows the first air conditioner to release the system energy reserve corresponding to the original operating load while cutting off substantial temperature control energy consumption. Subsequently, the system makes targeted adjustments to the operating power and outlet air temperature of the second air conditioner based on the released operating load, accurately transferring and compensating the energy originally consumed in unoccupied areas to the high-load second air conditioner. This effectively reduces the overall system's ineffective energy consumption while improving the temperature control capability of high-demand areas, ensuring the overall comfort of the cabin. Attached Figure Description

[0016] This application can be better understood from the following description of specific embodiments in conjunction with the accompanying drawings, wherein: Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0017] Figure 1 This is a flowchart of a control method for an air conditioning system provided in one embodiment of this application; Figure 2 This is a flowchart of a control method for an air conditioning system provided in another embodiment of this application; Figure 3 This is a flowchart of a control method for an air conditioning system provided in another embodiment of this application; Figure 4 This is a schematic diagram of the in-vehicle environment provided in one embodiment of this application; Figure 5 This is a temperature change curve of different areas inside the vehicle under different air conditioning modes after the air conditioner is turned on in both cooling and heating modes, according to one embodiment of this application.

[0018] Figure 6This is a schematic diagram of the architecture of an air conditioning system provided in one embodiment of this application; Figure 7 This is a schematic diagram of the structure of a control device for an air conditioning system provided in one embodiment of this application. Detailed Implementation

[0019] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0021] With the continuous iteration of automotive air conditioning thermal management technology, in-vehicle three-zone automatic air conditioning systems have gradually become mainstream configurations, especially prevalent in 6- and 7-seater multi-occupant vehicles, and often as standard equipment. To achieve independent temperature control in each of the three zones, the air conditioning system typically adopts a distributed architecture of a front air conditioning unit and a rear air conditioning unit. Through coordinated control by the vehicle's air conditioning controller, it enables independent adjustment of temperature, airflow, and mode for the driver's area, passenger area, and rear passenger area. When both the front and rear air conditioning units operate simultaneously, the vehicle's cooling or heating energy consumption is significantly higher than when only the front air conditioning is running. Therefore, intelligent start-stop and load distribution based on the rear passenger status are key technologies for achieving intelligent control of the rear air conditioning and improving overall vehicle energy efficiency.

[0022] Under normal driving conditions, the second and third rows of rear passenger compartments are often unoccupied. In some models, the rear air conditioning control interface is at a different interaction level than the front air conditioning control interface. Drivers may not notice that the rear air conditioning is running, leading to unnecessary prolonged operation and significantly increasing the energy consumption of the vehicle's thermal management system. If the rear air conditioning is turned off directly when the front cooling or heating load is high, it will affect the overall cooling or heating rate of the cabin. Therefore, adjusting the parameters of front and rear components during the pre-shutdown period of the rear air conditioning is key to balancing cabin comfort and energy consumption.

[0023] To address the problems of the prior art, embodiments of this application provide a control method, air conditioning system, device, storage medium, and product for an air conditioning system. The control method for the air conditioning system provided in this application embodiment will be described first below.

[0024] Figure 1 A flowchart illustrating a control method for an air conditioning system according to an embodiment of this application is shown. The air conditioning system includes at least a first air conditioner and a second air conditioner. The first air conditioner is installed at a position corresponding to the first row of seats in the vehicle's passenger compartment, and the second air conditioner is installed at a position corresponding to the second row of seats in the vehicle's passenger compartment; as shown... Figure 1 As shown, the method includes the following steps: S101: Obtain the occupancy status signal of each seat in the first row.

[0025] S102: When all occupancy status signals are unoccupied and the first air conditioner is turned on, obtain the operating load of the second air conditioner.

[0026] S103: If the operating load of the second air conditioner is greater than a preset threshold, obtain the operating load of the first air conditioner and change the operating state of the first air conditioner to the air supply state.

[0027] S104: Adjust the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner.

[0028] In the specific implementation of S101, the system periodically sends status request commands to the pressure sensors or seat belt buckle switches installed under the seat cushions of each seat in the first row via the vehicle communication network, and receives detection signals returned by each sensor. The control unit compares the received analog voltage signal or digital level signal with a preset threshold. When the pressure signal value is lower than the vacant seat determination threshold or the seat belt buckle signal is in an open state, the occupancy status flag bit corresponding to that seat is written as "not occupied"; otherwise, it is written as "occupied".

[0029] In the specific implementation of S102, when it is determined that all the occupancy status flags corresponding to the first seat row are "unoccupied", a load query frame is sent to the variable frequency drive module or power monitoring module of the second air conditioner, and the real-time operating parameters are received. These parameters can be the real-time power consumption of the compressor, the effective value of the compressor input current, or the load percentage calculated by comprehensively considering the evaporator inlet temperature, fan speed and expansion valve opening.

[0030] In the specific implementation of S103, the second air conditioner operating load obtained in step S102 is compared with a pre-calibrated and stored preset threshold. If the operating load is greater than the threshold, the operating load of the first air conditioner is obtained. The execution process is the same as obtaining the second air conditioner load, that is, a query command is sent to the drive module or power monitoring module of the first air conditioner to read its power or load value. Furthermore, the operating state of the first air conditioner is changed to air supply state. Specifically, a stop command is sent to the compressor electromagnetic clutch or inverter of the first air conditioner to stop its cooling or heating output, while maintaining the blower of the first air conditioner at its current speed.

[0031] In the specific implementation of S104, the operating load value of the first air conditioner is substituted into a preset compensation function to calculate the power bias value that needs to be superimposed on the current operating power of the second air conditioner. This bias value is then algebraically added to the current operating power setting value of the second air conditioner to generate the target operating power. Furthermore, the target outlet air temperature is calculated based on the load value using a lookup table or formula. Generally, the higher the load of the first air conditioner, the lower the target outlet air temperature of the second air conditioner, to compensate for the cooling capacity lost when the first air conditioner switches to blow-by mode. Then, the control unit sends a speed increase command to the inverter drive module of the second air conditioner to increase the compressor power to the target value, and sends an adjustment command to the temperature damper actuator or electronic expansion valve to reduce the evaporator surface temperature, causing the outlet air temperature to converge towards the target value.

[0032] The air conditioning system control method provided in this application embodiment, when confirming that all seats corresponding to the first air conditioner are unoccupied and the second air conditioner has a high operating load, changes the first air conditioner to air supply mode to reduce ineffective temperature control energy consumption in unoccupied areas. Simultaneously, it acquires the original operating load of the first air conditioner as an energy allocation benchmark, and dynamically adjusts the operating power and outlet air temperature of the second air conditioner accordingly. Since the occupancy status signals of all seats corresponding to the first air conditioner are all unoccupied, indicating that the first air conditioner is currently in an ineffective temperature control state with no actual demand, when the operating load of the second air conditioner exceeds a preset threshold, indicating a high temperature control demand, the system acquires the operating load of the first air conditioner and changes its operating state to air supply mode. This allows the first air conditioner to release system energy reserves corresponding to the original operating load while cutting off substantial temperature control energy consumption. Subsequently, the system makes targeted adjustments to the operating power and outlet air temperature of the second air conditioner based on this released operating load, accurately transferring and compensating for the energy originally consumed in unoccupied areas to the high-load second air conditioner. This effectively reduces overall system ineffective energy consumption while improving the temperature control capability in high-demand areas, ensuring the overall comfort of the cabin.

[0033] In order to flexibly implement automatic control switching, in some implementations, reference is made to... Figure 2 The method may also include: S201: Upon receiving an operation signal from the user for the first air conditioner, stop the automatic control of the air conditioning system.

[0034] S202: Obtain vehicle status information when the automatic control of the air conditioning system stops and the first air conditioner is turned on.

[0035] S203: If the status information meets the preset activation conditions, restart the automatic control of the air conditioning system.

[0036] In the specific implementation of S201, the system continuously monitors physical button trigger signals from the control panel, touch coordinate data streams from the touchscreen, or remote control command messages from the vehicle communication network. When such signal inputs are detected, the system parses the operation object identifier carried by the signal, extracts the identification code of the operation object as the first air conditioner, and simultaneously parses the operation type code to confirm that it is a control command such as temperature adjustment, fan speed adjustment, or mode switching. Subsequently, the automatic control mode of the air conditioning system is rewritten to the disabled state, and a termination command is sent to the currently executing automatic control logic process, thereby stopping all automatic intervention actions on the first and second air conditioners. For example, when the user raises the target temperature of the first air conditioner, which was originally in automatic mode, from 22°C to 25°C via the central control screen, the touch coordinate signal of this adjustment action is collected. The system parses it to determine that the operation object is the first air conditioner and the operation type is temperature adjustment, and immediately sets the automatic control flag to the disabled state, no longer pulling the temperature of the first air conditioner back to 22°C according to the preset algorithm.

[0037] In the specific implementation of S202, the process of acquiring status information is triggered after both conditions are met: the automatic control of the air conditioning system is stopped, and the on / off status register of the first air conditioner is read to determine that it is in the on state. At this time, a data request frame is sent to the vehicle network bus. The destination node address of the request frame points to one or more of the vehicle status sensing module, the power battery management system, and the vehicle dynamics sensing module. Then, the response messages returned by each module are received and parsed, and at least one of the following values ​​is extracted from the data segment of the message according to a predefined byte order and bit width: vehicle speed value, battery remaining percentage value, and external ambient temperature value.

[0038] In the specific implementation of S203, one or more physical quantities of state information temporarily stored in step S202 are compared one by one with the pre-fixed set of activation condition thresholds; when the state information meets all the necessary conditions, such as comparing and finding that the vehicle speed is lower than the preset parking threshold and the remaining battery power is higher than the preset power threshold, an internal trigger signal that meets the conditions is generated; in response to the internal trigger signal, the coordinated automatic control of the first air conditioner and the second air conditioner is restored.

[0039] The above-described implementation of this application involves stopping the automatic control of the air conditioning system upon receiving a user's operation signal for the first air conditioner. Then, when the automatic control of the air conditioning system is stopped and the first air conditioner is in the on state, the vehicle's status information is obtained. If the status information meets the preset activation conditions, the automatic control of the air conditioning system is restarted, thereby flexibly switching the automatic control on and off.

[0040] In order to reasonably change the operating state of the first air conditioner under cooling conditions, in some embodiments, the operating load is the cooling load, and S103 may include: S1031: If the cooling load of the second air conditioner is greater than the first preset threshold, obtain the cooling load of the first air conditioner.

[0041] S1032: Change the operating status of the first air conditioner to the air supply state and shut down the cooling system of the first air conditioner.

[0042] In the specific implementation of S1031, the cooling load exhibited by the second air conditioner during current operation is continuously sampled. The cooling load is specifically taken from the real-time power consumption of the compressor of the second air conditioner, the effective value of the real-time input current, or the real-time cooling capacity calculated based on the temperature difference between the inlet and outlet of the evaporator and the refrigerant flow rate. The sampled value is compared with a pre-calibrated first preset threshold. When the comparison confirms that the sampled value is greater than the first preset threshold, the current cooling load value of the first air conditioner is obtained.

[0043] In the specific implementation of S1032, a state switch is executed, triggering the blower of the first air conditioner to maintain its current speed, cutting off the cooling transfer path between the evaporator and the passenger compartment, so that the air conditioning system only delivers natural air without cooling treatment to the first seating area. The cooling system of the first air conditioner is shut down, which can be done by cutting off the power supply to the electromagnetic clutch of the variable displacement compressor, writing a zero-speed command to the inverter of the electric compressor, or closing the compressor's intake regulating valve, thereby stopping the refrigerant circulation loop.

[0044] The above-described embodiments of this application obtain the cooling load of the first air conditioner when the cooling load of the second air conditioner exceeds a first preset threshold, and then change the operating state of the first air conditioner to the air supply state, shutting down the cooling system of the first air conditioner. This allows for a reasonable change in the operating state of the first air conditioner while it is in cooling mode.

[0045] In order to accurately adjust the operating power and outlet air temperature of the second air conditioner in cooling mode, in some embodiments, S104 may include: S1041: Based on the cooling load of the first air conditioner, increase the compressor speed of the second air conditioner.

[0046] S1042: Determine the corresponding cooling compensation value based on the cooling load of the first air conditioner.

[0047] S1043: Reduce the target air outlet temperature of the second air conditioner according to the cooling compensation value.

[0048] In the specific implementation of S1041, the first air conditioning cooling load value obtained in step S1031 is read, and this value is used as an input variable and input into a pre-calibrated speed compensation mapping table. In this mapping table, the cooling load value is used as an index to perform a lookup operation or linear interpolation operation to obtain the speed increment value that matches the current first air conditioning cooling load. The current real-time speed of the second air conditioning compressor is algebraically added to the speed increment value to calculate the target speed value. The speed adjustment command containing the target speed value is sent to the compressor drive module of the second air conditioning unit. By adjusting the AC frequency output by the drive module, the compressor rotor speed is smoothly increased from the current value to the target speed value.

[0049] In the specific implementation of S1042, the cooling load value of the first air conditioner is used as the query condition, and a matching search is performed in a pre-calibrated cooling compensation relationship table. The relationship table uses the cooling load value as the index item and the temperature compensation value as the corresponding item. The mapping relationship is pre-determined through a vehicle heat load balance test. The matching process compares the input cooling load value with each index item in the relationship table, selects the temperature compensation value corresponding to the closest index item as the output, or calculates the accurate temperature compensation value through linear interpolation between adjacent index items. The temperature compensation value represents the amount of air outlet temperature reduction corresponding to the additional cooling capacity that the second air conditioner needs to bear due to the first air conditioner stopping cooling.

[0050] In the specific implementation of S1043, the temperature compensation value determined in step S1042 is algebraically summed with the current target air outlet temperature setting value of the second air conditioner. The updated target air outlet temperature is calculated by subtracting the temperature compensation value from the current target air outlet temperature setting value. The updated target air outlet temperature replaces the current target temperature setting value in the temperature control loop of the second air conditioner. Using the updated target air outlet temperature as the control benchmark, the real-time feedback value of the air outlet temperature sensor is continuously collected. The deviation between the real-time feedback value and the target air outlet temperature is calculated. Based on the deviation value, an adjustment amount is generated through a proportional-integral-derivative control algorithm. According to the adjustment amount, the opening of the electronic expansion valve is increased or the rotation angle of the temperature damper actuator is adjusted to increase the refrigerant flow through the evaporator or reduce the mixing ratio of hot and cold air, so that the actual air outlet temperature gradually decreases and stabilizes at the updated target air outlet temperature.

[0051] The above-described implementation method of this application increases the compressor speed of the second air conditioner based on the cooling load of the first air conditioner, and then determines the corresponding cooling compensation value according to the cooling load of the first air conditioner. Then, according to the cooling compensation value, the target air outlet temperature of the second air conditioner is reduced, thereby accurately adjusting the operating power and air outlet temperature of the second air conditioner in the cooling state.

[0052] In order to reasonably change the operating state of the first air conditioner in heating mode, in some implementation methods, reference is made to... Figure 3 The operating load is the heating load, S103, which may include: S301: If the heating load of the second air conditioner is greater than the second preset threshold, obtain the heating load of the first air conditioner.

[0053] S302: Change the operating status of the first air conditioner to the air supply state and turn off the electric heater of the first air conditioner.

[0054] In the specific implementation of S301, the heating load exhibited by the second air conditioner during current operation is continuously sampled. The heating load is specifically taken from the real-time power consumption of the electric heater of the second air conditioner, the real-time effective value of the heater's input current, or the real-time heating capacity calculated based on the temperature difference between the inlet and outlet of the condenser and the refrigerant flow rate. The sampled value is compared with a pre-calibrated second preset threshold. When the comparison confirms that the sampled value is greater than the second preset threshold, the current heating load value of the first air conditioner is obtained.

[0055] In the specific implementation of S302, the blower is triggered to maintain its current speed by sending a disconnect command to the switching device in the power supply circuit of the electric heater of the first air conditioner. Specifically, this can be achieved by controlling the relay contacts to open, turning off the drive signal of the power transistor, or writing a zero-power command to the heater controller, thereby cutting off the current path and stopping the electric heater from generating heat. This prevents the air conditioning system from supplying heat to the first row of seats.

[0056] The above-described implementation of this application involves obtaining the heating load of the first air conditioner when the heating load of the second air conditioner is greater than a second preset threshold, thereby changing the operating state of the first air conditioner to the air supply state and turning off the electric heater of the first air conditioner, thus reasonably changing the operating state of the first air conditioner in the heating state.

[0057] In order to accurately adjust the operating power and outlet air temperature of the second air conditioner in heating mode, in some implementations, reference is made to... Figure 3 S104 may include: S303: Based on the heating load of the first air conditioner, increase the power of the electric heater of the second air conditioner.

[0058] S304: Determine the corresponding heating compensation value based on the heating load of the first air conditioner.

[0059] S305: Increase the target air outlet temperature of the second air conditioner according to the heating compensation value.

[0060] In the specific implementation of S303, the previously acquired current heating load value of the first air conditioner is read and used as an input variable, which is then input into a pre-calibrated power compensation mapping table. By performing a lookup operation or linear interpolation operation in the mapping table, the power increment value of the electric heater that matches the current heating load of the first air conditioner is obtained. The current real-time power consumption of the electric heater of the second air conditioner is algebraically added to the power increment value to calculate the target electric heater power value. An adjustment command containing the target power value is sent to the electric heater power drive circuit of the second air conditioner. By adjusting the duty cycle of the power switching device or the effective value of the supply voltage in the drive circuit, the actual power consumed by the electric heater is smoothly increased from the current value to the target power value.

[0061] In the specific implementation of S304, the heating load value of the first air conditioner is used as the query condition, and a matching search is performed in a pre-calibrated heating compensation relationship table. The relationship table uses the heating load value as the index item and the air outlet temperature increase as the corresponding item. The mapping relationship is pre-determined through a vehicle heat load balance test. The matching process compares the input heating load value with each index item in the relationship table, selects the temperature increase corresponding to the closest index item as the output, or calculates the accurate temperature compensation value through linear interpolation between adjacent index items. The temperature compensation value represents the amount of air outlet temperature increase corresponding to the additional heating load that the second air conditioner needs to bear due to the first air conditioner stopping heating.

[0062] In the specific implementation of S305, the updated target air outlet temperature is calculated by adding the heating compensation value to the current target air outlet temperature setpoint; the updated target air outlet temperature replaces the current target temperature setpoint in the second air conditioning temperature control loop; using the updated target air outlet temperature as the control benchmark, the real-time feedback value of the air outlet temperature sensor is continuously collected, the deviation between the real-time feedback value and the target air outlet temperature is calculated, and based on the deviation value, an adjustment amount is generated through a proportional-integral-derivative control algorithm. Based on the adjustment amount, the power supply of the electric heater is increased or the rotation angle of the temperature damper actuator is adjusted to increase the heat exchange of air through the heater core or increase the mixing ratio of hot and cold air, so that the actual air outlet temperature gradually rises and stabilizes at the updated target air outlet temperature.

[0063] The above-described implementation method of this application increases the power of the electric heater of the second air conditioner based on the heating load of the first air conditioner, and then determines the corresponding heating compensation value according to the heating load of the first air conditioner, so as to accurately adjust the operating power and outlet air temperature of the second air conditioner in the heating state.

[0064] In order to reduce power consumption by turning off the air conditioner when appropriate, in some embodiments, after S102, the method may further include: S1021: When the operating load of the second air conditioner is less than or equal to a preset threshold, record the state duration of the state where the operating load is less than or equal to the preset threshold.

[0065] S1022: If the state holding time reaches the preset time threshold, turn off the first air conditioner.

[0066] In the specific implementation of S1021, when the comparison result shows that the operating load is less than or equal to a preset threshold, a timing action is initiated to determine the duration of the low-load state. Simultaneously, the real-time operating load of the second air conditioner is continuously acquired through periodic sampling, and the sampled value is compared with the preset threshold after each sampling. If the sampled value is found to be greater than the preset threshold, the timing is immediately reset, and the accumulated duration value is cleared.

[0067] In the specific implementation of S1022, the recorded duration value is continuously compared with a preset time threshold. When the accumulated duration value of the timer reaches or exceeds the preset time threshold, a shutdown control command for the first air conditioner is generated. The target of this shutdown command is the power management module or system start / stop control unit of the first air conditioner. The command content includes control codes to cut off the main power supply to the first air conditioner or to put the first air conditioner into standby sleep mode. In response to this command, the power supply to the blower drive circuit of the first air conditioner is cut off, the blower stops running, and the damper actuators in the air conditioning unit return to the preset shutdown reference position, and the entire first air conditioning system stops operating.

[0068] The above-described embodiments of this application record the state duration of the second air conditioner when its operating load is less than or equal to a preset threshold, and then turn off the first air conditioner when the state duration reaches a preset time threshold, thereby turning off the air conditioner in an appropriate manner to reduce power consumption.

[0069] As another implementation method, refer to Figure 4 As shown in Figure 1, when the rear smart air conditioning function is not activated, the rear air conditioning remains on when the second and third rows are unoccupied. As shown in Figure 2, when the rear smart air conditioning function is activated, the rear air conditioning automatically shuts off when the second and third rows are unoccupied. As shown in Figure 3, when the rear smart air conditioning function is activated, the rear air conditioning automatically turns on when the second and third rows are occupied.

[0070] When the rear air conditioning switch is on, if any seat in the rear generates a valid seat-occupying signal and this signal remains active for a preset duration, the air conditioning controller will automatically turn on the rear air conditioning. If no valid seat-occupying signal is received in the rear seats and the air conditioning is on, the front cooling or heating load must be considered.

[0071] When the front row is in cooling mode and the cooling load is greater than the first preset value, in order to improve the cooling rate of the front row, during the period when the rear air conditioning is pre-closed, the cooling of the front and rear rows is compensated and corrected. The rear air conditioning is kept on and the air volume is maintained to ensure that the rear row is in a ventilated state. The rear evaporator solenoid valve is closed to ensure that the cooling capacity is used for the front row. Based on the cooling load of the rear passenger cabin, the compressor speed is requested to be increased to compensate. The target air outlet temperature of the front row is reduced to compensate.

[0072] When the front row is in heating mode and the heating load is greater than the second preset value, in order to improve the heating rate of the front row, during the period when the rear air conditioning is pre-closed, the heating of the front and rear rows is compensated and corrected, and the rear air conditioning is kept on and the air volume is maintained; the power of the rear electric heater is compensated based on the deviation between the target breathing point temperature of the front row and the actual cabin temperature; the front electric heater is compensated for the increase based on the heating load of the rear cabin; and the target air outlet temperature of the front row is compensated for the increase.

[0073] If the preset time period of no rear seats is maintained and the desired conditions are not met, the air conditioning controller will automatically turn off the rear air conditioning. If the user manually turns the rear air conditioning on or off while the smart rear air conditioning switch is on, the smart rear air conditioning control function will immediately become disabled. When the smart rear air conditioning switch is on and the smart control function is disabled, it can be reactivated by: the vehicle completing a sleep / wake-up process and the controller re-initializing; the vehicle's power mode switching from non-working mode to standby mode; or the user manually resetting the smart rear air conditioning switch by turning it off and then on again.

[0074] refer to Figure 5 , Figure 5 This diagram illustrates the temperature changes in different areas of the vehicle interior under different air conditioning modes, both in cooling and heating conditions. The red curve represents the rear air conditioning being on; the green curve represents it being off immediately; and the blue curve represents the rear air conditioning being in a ventilated state with delayed shutdown, as per the proposed solution. The diagram shows that because the proposed solution ensures that both cooling and heating capacity are used in the front seats, while maintaining airflow by activating the rear air conditioning fans, the overall efficiency in the front seats is the highest.

[0075] As one implementation method, refer to Figure 6 The air conditioning system architecture used in this solution is shown in the figure. The air conditioning system includes a compressor, a condenser, a first air conditioner, and a second air conditioner.

[0076] The compressor is connected to the condenser via a refrigerant line. The condenser is connected to the second evaporator of the second air conditioner via a refrigerant line. The second evaporator of the second air conditioner is connected to the first evaporator of the first air conditioner via a refrigerant line. The first evaporator of the first air conditioner is connected to the compressor via a refrigerant line.

[0077] A compressor is used to compress low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas.

[0078] The condenser is used to cool and liquefy the high-temperature, high-pressure refrigerant gas, and transfer the heat in the refrigerant to the outside of the vehicle through heat exchange with the outside air.

[0079] The compressor is located at the beginning of the system cycle and is connected to the condenser via refrigerant piping. It compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, providing power for the entire air conditioning system's refrigeration cycle. Pressure monitoring devices are installed at both the compressor's inlet and outlet to monitor the refrigerant pressure in real time.

[0080] The condenser is connected to the compressor via refrigerant piping. It cools and liquefies the high-temperature, high-pressure refrigerant gas and releases heat from the refrigerant outside the vehicle through heat exchange with the outside air. The condenser is further connected to the power supply unit and the battery via refrigerant piping. The power supply unit provides power to the battery, which works in conjunction with the condenser via refrigerant piping to assist in the cooling function. An electronic expansion valve is installed on the refrigerant piping between the battery and the secondary air conditioning unit to precisely regulate the refrigerant flow into the secondary air conditioning unit.

[0081] The second air conditioning unit consists of a heater core and a front evaporator, connected to an electric refrigeration system via refrigerant piping. The front evaporator absorbs heat through refrigerant evaporation to cool the front passenger area; the heater core uses engine coolant or electricity for heating the front passenger area through heat exchange. A pressure and temperature monitoring device is installed at the outlet of the second air conditioning unit to monitor the refrigerant temperature and pressure parameters in real time.

[0082] The first air conditioner includes an electric air heating element and a rear evaporator, connected to the second air conditioner via refrigerant piping. The rear evaporator absorbs heat through refrigerant evaporation to cool the rear passenger area; the electric air heating element acts as an electric heating device to heat the rear passenger area. A solenoid valve is installed at the inlet of the first air conditioner to control whether refrigerant enters the rear evaporator, thus achieving intelligent distribution of cooling capacity between the front and rear passenger areas. A pressure and temperature monitoring device is also installed at the outlet of the first air conditioner to monitor the temperature and pressure parameters of the refrigerant.

[0083] The electronic expansion valve in the system is located on the refrigerant line between the front evaporator of the second air conditioner and the rear evaporator of the first air conditioner, and is used to precisely control the refrigerant flow ratio entering the front and rear evaporators. A solenoid valve is located at the inlet of the rear evaporator of the first air conditioner, and automatically opens or closes according to system requirements to determine whether the rear evaporator participates in the refrigeration cycle.

[0084] The system also includes a controller for executing the control methods of the air conditioning system as described above.

[0085] Based on the air conditioning system control method provided in the above embodiments, this application also provides specific implementation methods of the air conditioning system control device. Please refer to the following embodiments.

[0086] First see Figure 7 The air conditioning system control device 600 provided in this application embodiment includes at least a first air conditioner and a second air conditioner. The first air conditioner is installed at a position corresponding to the first row of seats in the vehicle's passenger compartment, and the second air conditioner is installed at a position corresponding to the second row of seats in the vehicle's passenger compartment. The device includes: The acquisition module 601 is used to acquire the occupancy status signal of each seat in the first row of seats.

[0087] The judgment module 602 is used to obtain the operating load of the second air conditioner when all occupancy status signals are unoccupied and the first air conditioner is turned on.

[0088] The modification module 603 is used to obtain the operating load of the first air conditioner and change the operating status of the first air conditioner to the air supply state when the operating load of the second air conditioner is greater than a preset threshold.

[0089] The adjustment module 604 is used to adjust the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner.

[0090] As one implementation of this application, the control device 600 of the air conditioning system further includes: The receiving module is used to stop the automatic control of the air conditioning system when it receives an operation signal from the user for the first air conditioner.

[0091] The acquisition module is used to acquire vehicle status information when the automatic control of the air conditioning system is stopped and the first air conditioner is turned on.

[0092] The activation module is used to restart the automatic control of the air conditioning system when the status information meets the preset activation conditions.

[0093] As one implementation of this application, module 603 is modified, including: The acquisition unit is used to acquire the cooling load of the first air conditioner when the cooling load of the second air conditioner is greater than a first preset threshold.

[0094] The modification unit is used to change the operating status of the first air conditioner to the air supply state and to shut down the refrigeration system of the first air conditioner.

[0095] As one implementation of this application, module 604 is adjusted to include: The booster unit is used to increase the compressor speed of the second air conditioner based on the cooling load of the first air conditioner.

[0096] The determining unit is used to determine the corresponding cooling compensation value based on the cooling load of the first air conditioner.

[0097] The cooling unit is used to reduce the target air outlet temperature of the second air conditioner according to the cooling compensation value.

[0098] As one implementation of this application, module 603 is modified, including: The acquisition unit is used to acquire the heating load of the first air conditioner when the heating load of the second air conditioner is greater than a second preset threshold.

[0099] The shut-off unit is used to change the operating status of the first air conditioner to the air supply state and shut off the electric heater of the first air conditioner.

[0100] As one implementation of this application, module 604 is adjusted to include: An enhancement unit is used to increase the power of the electric heater of the second air conditioner based on the heating load of the first air conditioner.

[0101] The determining unit is used to determine the corresponding heating compensation value based on the heating load of the first air conditioner.

[0102] The compensation unit is used to increase the target air outlet temperature of the second air conditioner according to the heating compensation value.

[0103] As one implementation of this application, the control device 600 of the air conditioning system further includes: The recording module is used to record the duration of the state where the operating load of the second air conditioner is less than or equal to a preset threshold.

[0104] The shutdown module is used to shut down the first air conditioner when the state holding time reaches a preset time threshold.

[0105] Furthermore, in conjunction with the control methods for the air conditioning system described in the above embodiments, this application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the air conditioning system control methods described in the above embodiments.

[0106] This application also provides a computer program product, including a computer program, which, when executed, implements a method for controlling any of the air conditioning systems described in the above embodiments.

[0107] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0108] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0109] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0110] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, 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, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowchart illustrations, and combinations of blocks in the block diagrams and / or flowchart illustrations, can also be implemented by an FPGA performing the specified functions or actions, or can be implemented by a combination of an FPGA and computer instructions.

[0111] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A control method for an air conditioning system, characterized in that, The air conditioning system includes at least a first air conditioner and a second air conditioner, wherein the first air conditioner is installed at a position corresponding to the first row of seats in the vehicle's passenger compartment, and the second air conditioner is installed at a position corresponding to the second row of seats in the vehicle's passenger compartment; the method includes: Obtain the occupancy status signal of each seat in the first row; When all the aforementioned occupancy status signals are unoccupied and the first air conditioner is turned on, the operating load of the second air conditioner is obtained; If the operating load of the second air conditioner is greater than a preset threshold, the operating load of the first air conditioner is obtained and the operating status of the first air conditioner is changed to air supply status. Adjust the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner.

2. The control method for the air conditioning system according to claim 1, characterized in that, The method further includes: Upon receiving an operation signal from the user for the first air conditioner, the automatic control of the air conditioning system is stopped; When the automatic control of the air conditioning system stops and the first air conditioner is turned on, obtain the vehicle's status information; If the status information meets the preset activation conditions, the automatic control of the air conditioning system will be restarted.

3. The control method for the air conditioning system according to claim 1, characterized in that, The operating load is a cooling load. The step of obtaining the operating load of the first air conditioner and changing its operating state to air supply mode when the operating load of the second air conditioner exceeds a preset threshold includes: If the cooling load of the second air conditioner is greater than the first preset threshold, obtain the cooling load of the first air conditioner; Change the operating status of the first air conditioner to the air supply state and shut down the cooling system of the first air conditioner.

4. The control method for the air conditioning system according to claim 3, characterized in that, The adjustment of the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner includes: Based on the cooling load of the first air conditioner, increase the compressor speed of the second air conditioner; Determine the corresponding cooling compensation value based on the cooling load of the first air conditioner; According to the cooling compensation value, the target air outlet temperature of the second air conditioner is reduced.

5. The control method for an air conditioning system according to claim 1, characterized in that, The operating load is the heating load. The step of obtaining the operating load of the first air conditioner and changing its operating state to air supply mode when the operating load of the second air conditioner exceeds a preset threshold includes: If the heating load of the second air conditioner is greater than the second preset threshold, the heating load of the first air conditioner is obtained. Change the operating status of the first air conditioner to air supply mode and turn off the electric heater of the first air conditioner.

6. The control method for an air conditioning system according to claim 5, characterized in that, The adjustment of the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner includes: Based on the heating load of the first air conditioner, increase the power of the electric heater of the second air conditioner; The corresponding heating compensation value is determined based on the heating load of the first air conditioner; Increase the target air outlet temperature of the second air conditioner according to the heating compensation value.

7. The control method for an air conditioning system according to any one of claims 1 to 6, characterized in that, After obtaining the operating load of the second air conditioner when all the occupancy status signals are unoccupied and the first air conditioner is turned on, the method further includes: When the operating load of the second air conditioner is less than or equal to a preset threshold, record the state duration of the state where the operating load is less than or equal to the preset threshold; If the state is maintained for a preset time threshold, the first air conditioner is turned off.

8. An air conditioning system, characterized in that, The air conditioning system includes a controller, a compressor, a condenser, a first air conditioner, and a second air conditioner; The compressor is connected to the condenser via a refrigerant line, the condenser is connected to the second evaporator of the second air conditioner via a refrigerant line, the second evaporator of the second air conditioner is connected to the first evaporator of the first air conditioner via a refrigerant line, and the first evaporator of the first air conditioner is connected to the compressor via a refrigerant line. The controller is used to execute the control method of the air conditioning system as described in any one of claims 1-7; The compressor is used to compress low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas. The condenser is used to cool and liquefy the high-temperature and high-pressure refrigerant gas, and transfer the heat in the refrigerant to the outside of the vehicle through heat exchange with the outside air.

9. A control device for an air conditioning system, characterized in that, The air conditioning system includes at least a first air conditioner and a second air conditioner, wherein the first air conditioner is installed at a position corresponding to the first row of seats in the vehicle's passenger compartment, and the second air conditioner is installed at a position corresponding to the second row of seats in the vehicle's passenger compartment; the device includes: The acquisition module is used to acquire the occupancy status signal of each seat in the first row of seats; The judgment module is used to obtain the operating load of the second air conditioner when all the occupancy status signals are unoccupied and the first air conditioner is turned on. The module is used to obtain the operating load of the first air conditioner and change the operating state of the first air conditioner to the air supply state when the operating load of the second air conditioner is greater than a preset threshold. The adjustment module is used to adjust the operating power and outlet air temperature of the second air conditioner based on the operating load of the first air conditioner.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the control method of the air conditioning system as described in any one of claims 1-7.

11. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the electronic device, the electronic device causes the electronic device to perform the control method of the air conditioning system as described in any one of claims 1-7.

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