Vehicle air conditioner control method and device, computer device and storage medium

Abstract

The application relates to a vehicle air conditioner control method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: according to a test type signal of an air conditioner, in the case that a target working device type is determined as a heater and a water pump, controlling the rotating speed of the water pump according to the real-time value and the target value of the flow of ethylene glycol in the air conditioner warm air pipeline; controlling the output of the heater according to the real-time value and the target value of the temperature of ethylene glycol in the air conditioner warm air pipeline. In the case that the target working device type is a compressor frequency converter and a condenser fan, controlling the output of the compressor frequency converter according to the difference between the real-time value and the target value of the rotating speed of the compressor, and controlling the rotating speed of the condenser fan according to the real-time value and the target value of the exhaust pressure. The control method provides a heat source control method, a cold source control method and a heat source and cold source joint control method for a cooling and heating air conditioner test bench, and can perform various performance calibration tests on a vehicle air conditioner without being installed on a commercial vehicle.

Description

Technical Field

[0001] This application relates to the field of product testing technology, and in particular to a vehicle air conditioning control method, device, computer equipment, storage medium, and computer program product. Background Technology

[0002] The vehicle air conditioning system is a crucial component of a vehicle's additional functions, providing a better driving environment for users. The air conditioning system operates in two modes: defrosting and heating. Therefore, defrosting and heating tests are essential components of basic performance testing in commercial vehicle development. The effectiveness of the vehicle's air conditioning system in defrosting and heating directly impacts overall vehicle performance and safety. Currently, vehicle performance testing is conducted after vehicle assembly, performing defrosting and heating tests in the vehicle's environment. Since the vehicle has already been assembled and transferred to the manufacturer, any issues discovered at this stage, requiring modifications to the air conditioning unit volume and ductwork, would extend the product development cycle and affect the vehicle's market launch schedule. Summary of the Invention

[0003] Therefore, it is necessary to provide a vehicle air conditioning control method, device, computer equipment, computer-readable storage medium, and computer program product that can be accurately implemented on a test bench to address the above-mentioned technical problems.

[0004] Firstly, this application provides a method for controlling an automotive air conditioning system. It is applied to control an air conditioning system in a vehicle before the complete vehicle assembly is finished; the method includes:

[0005] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0006] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0007] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0008] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0009] In one embodiment, the air conditioning test type signal includes the vehicle speed; correspondingly, the process of obtaining the target flow rate of ethylene glycol in the air conditioning heating duct includes:

[0010] Based on the vehicle's speed, obtain at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle, and determine the target flow rate of ethylene glycol in the air conditioning and heating duct based on the at least two historical values.

[0011] The reference vehicle is equipped with an air conditioner of the same model as the air conditioner. The historical values ​​were collected during the historical driving process of the reference vehicle at its driving speed.

[0012] In one embodiment, controlling the pump speed based on the difference between the real-time flow rate and the target flow rate includes:

[0013] The difference between the real-time flow rate and the target flow rate is input to the first PID controller. The difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

[0014] In one embodiment, the method further includes:

[0015] When the target operating device type is a compressor inverter and a condenser fan, obtain the target values ​​of the compressor speed and discharge pressure of the air conditioner;

[0016] The real-time values ​​of the compressor speed and discharge pressure of the air conditioner are collected. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the output of the compressor inverter is controlled so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than the third preset threshold.

[0017] The speed of the condenser fan is controlled based on the difference between the real-time exhaust pressure value and the target exhaust pressure value, so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than the fourth preset threshold.

[0018] In one embodiment, the method further includes:

[0019] The temperature of the air conditioner's thermostat is obtained. If the temperature of the thermostat is lower than the first preset temperature, the compressor's clutch is disengaged so that the compressor runs idle and does not cool.

[0020] When the temperature of the thermostat is higher than the second preset temperature, the compressor clutch is engaged to make the compressor cool; when the first preset temperature is lower than the second preset temperature.

[0021] In one embodiment, controlling the output of the compressor inverter based on the difference between the real-time compressor speed and the target compressor speed includes:

[0022] The difference between the real-time compressor speed and the target compressor speed is input to the second PID controller. The difference between the real-time compressor speed and the target compressor speed is used to instruct the second PID controller to control the output of the compressor inverter.

[0023] Secondly, this application also provides a vehicle air conditioning control device. It is used to control the air conditioning system of a vehicle before the final vehicle assembly is completed; the device includes:

[0024] The signal acquisition module is used to acquire the air conditioner test type signal and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal.

[0025] The numerical acquisition module is used to acquire the target flow rate and temperature of ethylene glycol in the air conditioning heating pipe when the target working device type is a heater and a water pump.

[0026] The first control module is used to collect the real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe, and control the speed of the water pump based on the difference between the real-time flow rate and the target flow rate, so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0027] The second control module is used to control the output of the heater based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0028] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0029] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0030] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0031] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0032] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0033] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0034] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0035] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0036] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0037] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0038] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0039] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0040] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0041] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0042] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0043] The aforementioned vehicle air conditioning control method, device, computer equipment, storage medium, and computer program product acquire an air conditioning test type signal, and determine the type of target working device providing the corresponding function in the air conditioning system based on the test type signal. When the target working device type is a heater and a water pump, the method acquires the target flow rate and target temperature values ​​of ethylene glycol in the air conditioning heating duct. It collects the real-time flow rate and real-time temperature values ​​of ethylene glycol in the air conditioning heating duct, and controls the water pump speed based on the difference between the real-time flow rate and the target flow rate value, ensuring that the difference is less than a first preset threshold. Based on the difference between the real-time temperature value and the target temperature value, it controls the heater output, ensuring that the difference is less than a second preset threshold. This control method provides a heating and cooling air conditioning test bench with methods including heat source control, cold source control, and combined heat and cold source control, enabling tests such as heating performance verification, defrosting performance verification, and automatic air conditioning bench calibration of vehicle air conditioning systems when not installed on a commercial vehicle. Attached Figure Description

[0044] Figure 1 This is an application environment diagram of a vehicle air conditioning control method in one embodiment;

[0045] Figure 2 This is a flowchart illustrating a vehicle air conditioning control method in one embodiment;

[0046] Figure 3 This is a flowchart illustrating the vehicle air conditioning control method in another embodiment;

[0047] Figure 4 This is a flowchart illustrating the vehicle air conditioning control method in yet another embodiment;

[0048] Figure 5 This is a schematic diagram of the structure of an automotive air conditioning control system in one embodiment;

[0049] Figure 6 This is a structural block diagram of a vehicle air conditioning control device in one embodiment;

[0050] Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0052] The vehicle air conditioning control method provided in this application embodiment can be applied to, for example, Figure 1In the application environment shown, terminal 102 is a sensor capable of collecting various operational data from the air conditioner, such as temperature and flow sensors. Terminal 102 communicates with server 104 via a network, sending the collected operational data to server 104, which then processes the data to control the vehicle's air conditioning. A data storage system can store the data processed by server 104. This data storage system can be integrated onto server 104 or hosted on a cloud or other network server. Server 104 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0053] In one embodiment, such as Figure 2 As shown, a vehicle air conditioning control method is provided, applied to control the air conditioning system of an incomplete vehicle assembly. The method utilizes a cooling and heating air conditioning test bench to control the vehicle's air conditioning system. Figure 1 Taking server 104 as an example, the following steps are included:

[0054] Step 202: Obtain the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0055] The air conditioning test type signal indicates the type of test required for the vehicle's air conditioning system and is triggered manually by staff. In other words, the air conditioning control method provided in this application is triggered by manually selecting the test type. The corresponding function refers to the functions provided by the air conditioning system; common air conditioning functions include heating, cooling, dehumidification, and ventilation. The target operating device type refers to the internal air conditioning device required to provide the corresponding function; for example, a compressor for cooling and a heat pump for heating.

[0056] It should be noted that the type of target working device to be controlled will differ depending on the type of test performed on the vehicle air conditioning system. Specifically, in one embodiment, when testing the heating performance of the air conditioning system, it is necessary to control the air conditioning system as a heat source to provide energy. In this case, the types of target working devices to be controlled include heaters, heat pumps, water pumps, etc. When testing the cooling performance of the air conditioning system, it is necessary to control the air conditioning system as a cold source to provide energy. The corresponding type of target working device includes compressors.

[0057] It should be emphasized that, since different air conditioners have certain differences in the subdivision of working devices, the embodiments of this application can control all target working devices that provide corresponding functions by using the air conditioner test type and model. It is not limited to one or two working devices, but controls all devices when the air conditioner is used as a heat source and / or cold source as a whole.

[0058] Step 204: If the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating pipe.

[0059] Ethylene glycol, also known as glycol, abbreviated as MEG, has the chemical formula (CH2OH)2 and is the simplest diol. The ethylene glycol molecule has two hydroxyl groups, which are stable and typically do not change their physicochemical properties after one year of storage. At room temperature, ethylene glycol is a colorless, odorless, sweet-tasting viscous liquid with a specific gravity of approximately 1.11, a boiling point of 197.3℃, a freezing point of -12.6℃, a flash point of 111.1℃, and an autoignition point of 418℃. In automobiles, ethylene glycol is commonly used as a coolant, meaning that the heat generated during vehicle operation is "delivered" into the passenger compartment through the flowing ethylene glycol, where the air conditioning system acts as a heat source to provide energy. It should be noted that when the heat extracted from the vehicle's operation is insufficient, a heater is needed to heat the ethylene glycol in the pipes to ensure sufficient heat is provided to the passenger compartment. Therefore, when the target working device type is a heater and water pump, and the vehicle's air conditioning system provides energy as a heat source, precise control of the air conditioning system can be achieved by monitoring the state of the ethylene glycol in the pipes.

[0060] Specifically, the flow rate of ethylene glycol reflects its flow velocity and volume. Combined with the temperature of the ethylene glycol, the amount of heat that the ethylene glycol in the pipeline can "carry" can be determined. The target values ​​for the flow rate and temperature of ethylene glycol corresponding to the air conditioning test type signal are acquired and used as targets to control the air conditioning. Specifically, these target values ​​can be determined based on the specific circumstances of the air conditioning test and historical operating data, such as the distance traveled after vehicle startup and vehicle speed. In one embodiment, the flow rate and temperature values ​​of ethylene glycol collected at different driving speeds of the commercial vehicle can be input into a server for use in controlling the vehicle's air conditioning.

[0061] Step 206: Collect the real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe. Based on the difference between the real-time flow rate and the target flow rate, control the speed of the water pump so that the difference between the real-time flow rate and the target flow rate is less than the first preset threshold.

[0062] The real-time flow rate of ethylene glycol can be obtained using a flow sensor, and the real-time temperature can be obtained using a temperature sensor. No specific limitations are made regarding the type and model of the sensors used. It is understood that the difference between the real-time value and the target value reflects the discrepancy between the real-time operating state and the ideal state of the device in the target operating device type, allowing for adjustments.

[0063] Step 208: Based on the difference between the real-time temperature value and the target temperature value, control the output of the heater so that the difference between the real-time temperature value and the target temperature value is less than the second preset threshold.

[0064] Specifically, the pump speed can be controlled by the difference between the real-time flow rate and the target flow rate. For example, if the difference is negative, it indicates a low flow rate, requiring an increase in pump speed to increase the ethylene glycol flow in the pipeline; conversely, a positive difference indicates a high flow rate, requiring a decrease in pump speed to reduce the ethylene glycol flow. Furthermore, the magnitude of the difference can be used to determine the adjustment amount for the pump speed.

[0065] Similarly, for the temperature of ethylene glycol, the pump speed can be controlled by the difference between the real-time temperature value and the target temperature value. For example, if the difference is negative, it indicates that the temperature is low, and the heater output needs to be increased to raise the temperature of the ethylene glycol in the pipeline; if the difference is positive, it indicates that the temperature is high, and the heater output needs to be reduced or zeroed to lower the temperature of the ethylene glycol in the pipeline. Furthermore, the magnitude of the difference can be used to determine the adjustment amount of the heater output.

[0066] By continuously acquiring the difference and adjusting the working status of the water pump and heater, the difference between the real-time flow rate and the target flow rate is made less than the first preset threshold, and the difference between the real-time temperature and the target temperature is made less than the second preset threshold, ensuring that the vehicle air conditioning status is closer to the actual vehicle working status.

[0067] In the method provided in the above embodiments, an air conditioning test type signal is acquired, and the type of target working device providing the corresponding function in the air conditioner is determined based on the test type signal. When the target working device type is a heater and a water pump, the target flow rate and target temperature value of ethylene glycol in the air conditioning heating pipe are acquired. Real-time flow rate and real-time temperature values ​​of ethylene glycol in the air conditioning heating pipe are collected, and the water pump speed is controlled based on the difference between the real-time flow rate and the target flow rate value, so that the difference between the real-time flow rate and the target flow rate value is less than a first preset threshold. The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold. This control method provides a heating and cooling air conditioning test bench with methods including heat source control, cold source control, and combined heat and cold source control. It enables tests such as heating performance verification, defrosting performance verification, and automatic air conditioning bench calibration of vehicle air conditioning systems when the system is not installed in a commercial vehicle.

[0068] In one embodiment, the air conditioning test type signal includes the vehicle's driving speed; accordingly, see Figure 3 The process of obtaining the target flow rate of ethylene glycol in the air conditioning heating duct includes:

[0069] Step 302: Based on the vehicle's driving speed, obtain at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle, and determine the target value of the flow rate of ethylene glycol in the air conditioning and heating duct based on the at least two historical values.

[0070] Step 304: The reference vehicle is equipped with an air conditioner of the same model as the air conditioner. The historical values ​​are collected during the historical driving process of the reference vehicle at the vehicle's driving speed.

[0071] When conducting performance tests on the air conditioning systems of commercial vehicles, tests can be performed based on historical operating data from a reference vehicle. The reference vehicle is a complete vehicle equipped with the same model of air conditioning system as the one being tested. Historical operating data from the reference vehicle is collected to determine target values. For example, for target values ​​of ethylene glycol flow rate and temperature, based on the historical operating data of the reference vehicle, historical values ​​of ethylene glycol flow rate and temperature corresponding to different vehicle speeds and mileages are determined. Based on a large amount of historical data, target values ​​of ethylene glycol temperature and flow rate for each vehicle speed and mileage in China are then determined.

[0072] Specifically, at least two historical flow values ​​corresponding to each vehicle speed can be determined based on historical operating data, and their average value can be used as the target flow value of ethylene glycol for that vehicle speed. Alternatively, more complex data processing can be performed, such as weighted averaging, or a functional relationship can be fitted based on at least two historical values ​​to express the relationship between the target flow value and vehicle speed. When controlling the vehicle's air conditioning, the target flow value can be determined based on the vehicle's driving speed in the air conditioning test type signal.

[0073] In the method provided in the above embodiments, by collecting a large amount of historical data to determine the target value of the control parameters corresponding to the working device of the air conditioner, a more accurate target value can be obtained, thereby achieving more precise control of the vehicle.

[0074] In one embodiment, controlling the pump speed based on the difference between the real-time flow rate and the target flow rate includes:

[0075] The difference between the real-time flow rate and the target flow rate is input to the first PID controller. The difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

[0076] A PID controller (Proportional-Integral-Derivative controller) consists of a proportional unit (P), an integral unit (I), and a derivative unit (D). Control is achieved through the setting of three parameters: Kp, Ki, and Kd. PID controllers are primarily suitable for systems that are essentially linear and whose dynamic characteristics do not change over time. In this embodiment, the difference between the real-time flow rate and the target flow rate is input to the first PID controller, which then automatically controls the pump speed. Similarly, the difference between the real-time temperature value and the target temperature value can be input to a third PID controller to achieve automatic control of the heater's output.

[0077] The method provided in the above embodiments employs a PID controller for automatic control. It compares collected data with a reference value and uses this difference to calculate a new input value. The purpose of this new input value is to ensure that the system data reaches or remains at the reference value. Unlike other simple control operations, the PID controller can adjust the input value based on historical data and the frequency of differences, thus making the system more accurate and stable. It can be mathematically proven that, while other control methods may lead to stability errors or process repetitions, a PID feedback loop can maintain system stability.

[0078] In one embodiment, the method further includes:

[0079] When the target operating device type is a compressor inverter and a condenser fan, obtain the target values ​​of the compressor speed and discharge pressure of the air conditioner;

[0080] The real-time values ​​of the compressor speed and discharge pressure of the air conditioner are collected. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the output of the compressor inverter is controlled so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than the third preset threshold.

[0081] The speed of the condenser fan is controlled based on the difference between the real-time exhaust pressure value and the target exhaust pressure value, so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than the fourth preset threshold.

[0082] In an air conditioning system, the compressor is the heart of the refrigeration system. It is a driven fluid machine that elevates low-pressure gas to high-pressure gas. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it using a piston driven by a motor, and then discharges high-temperature, high-pressure refrigerant gas through the exhaust pipe, providing power for the refrigeration cycle. This achieves the refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption). The compressor inverter continuously adjusts its speed within a certain range through a control method or means, continuously changing the energy output of the compressor. The condenser fan is used to dissipate heat from the condenser; the speed of the condenser fan determines the rate of heat dissipation.

[0083] When the air-conditioned vehicle is used as a cold source for testing, the air conditioning system's compressor and condenser fan will operate. The operating parameters of these two devices are used to control the air conditioning system, ensuring it provides energy more effectively as a cold source. Specifically, based on the compressor speed and exhaust pressure collected from the commercial vehicle at different driving speeds, target values ​​for compressor speed and exhaust pressure are determined. Real-time values ​​for compressor speed and exhaust pressure are collected. The output of the compressor inverter is controlled by the difference between the real-time compressor speed and the target values ​​to ensure that the difference is less than a third preset threshold, meaning the real-time compressor speed is close to the target value.

[0084] Similarly, the difference between the real-time exhaust pressure value and the target exhaust pressure value controls the speed of the condenser fan so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than the fourth preset threshold, making the working state of the condenser fan closer to the working state of the actual vehicle.

[0085] It should be noted that the embodiments of this application can not only control the heat source and cold source separately, but also combine the heat source and cold source for joint control. The specific control method is the same as the above-mentioned individual control method; it only requires simultaneously collecting and controlling two loops to achieve simultaneous control of the heat source and cold source. This can meet the usage requirements of automatic air conditioners for calibration conditions in spring, autumn, and summer.

[0086] The method provided in the above embodiments provides a heating and cooling air conditioning test bench that includes heat source control, cold source control, and a combined control method for heat source and cold source. It can perform tests such as heating performance verification, defrosting performance verification, and automatic air conditioning bench calibration on commercial vehicles when the air conditioning is not installed on the vehicle.

[0087] In one embodiment, see Figure 4 The methods also include:

[0088] Step 402: Obtain the temperature of the air conditioner's thermostat. If the temperature of the thermostat is lower than the first preset temperature, control the compressor's clutch to disengage so that the compressor runs idle and does not cool.

[0089] Step 404: When the temperature of the thermostat is higher than the second preset temperature, control the clutch of the compressor to engage so that the compressor can cool; the first preset temperature is lower than the second preset temperature.

[0090] In one embodiment, when the thermostat reaches the disconnect temperature, the compressor clutch disengages, and the compressor idles without cooling; when the thermostat rises to the operating temperature, the compressor clutch engages, and the compressor starts cooling. The method provided in the above embodiment uses the temperature of the thermostat for better control of the compressor in the vehicle's air conditioning system, thereby simulating a summer vehicle cooling test based entirely on the vehicle's operating conditions.

[0091] In one embodiment, controlling the output of the compressor inverter based on the difference between the real-time compressor speed and the target compressor speed includes:

[0092] The difference between the real-time compressor speed and the target compressor speed is input to the second PID controller. The difference between the real-time compressor speed and the target compressor speed is used to instruct the second PID controller to control the output of the compressor inverter.

[0093] Similarly, the difference between the real-time exhaust pressure value and the target exhaust pressure value is input to the fourth PID controller, which automatically controls the speed of the condenser fan.

[0094] The method provided in the above embodiments employs a PID controller for automatic control. It compares collected data with a reference value and uses this difference to calculate a new input value. The purpose of this new input value is to ensure that the system data reaches or remains at the reference value. Unlike other simple control operations, the PID controller can adjust the input value based on historical data and the frequency of differences, thus making the system more accurate and stable. It can be mathematically proven that, while other control methods may lead to stability errors or process repetitions, a PID feedback loop can maintain system stability.

[0095] In one embodiment, see Figure 5 The air conditioning control system shown includes a test computer, temperature sensor, flow sensor, heater, water pump, pressure sensor, compressor speed, compressor inverter, condenser fan speed, and thermostat.

[0096] The heat source control method is as follows: First, the flow rate and temperature of ethylene glycol at different driving speeds collected from the commercial vehicle are used as input conditions to determine the target value. The flow rate and temperature are set by a testing computer, and the data measured by temperature and flow sensors are fed back to the testing computer. The difference between these values ​​and the set values ​​is used as the output of control PID1 and PID2. PID1 controls the heater output to ensure the temperature sensor reading reaches the set value; PID2 controls the water pump speed to ensure the flow sensor reading reaches the set value. Through testing computer control, the temperature and flow rate of ethylene glycol are brought to the operating state of the actual vehicle, thus simulating winter defrosting and heating conditions.

[0097] The cold source control method is as follows: First, the compressor speed and exhaust pressure at different driving speeds of the commercial vehicle are used as input conditions. The compressor speed and exhaust pressure are set by a test computer, and the data measured by the pressure sensor and compressor speed sensor are fed back to the test computer. The difference between these values ​​and the set values ​​is used as the output of PID4 and PID3. PID3 controls the output of the compressor inverter to make the measured compressor speed reach the set value. PID4 controls the condenser fan speed to make the measured pressure sensor value reach the set value. The test computer controls the compressor speed and pressure of the air conditioning system to achieve the actual vehicle operating conditions. When the thermostat reaches the disconnect temperature, the compressor clutch disengages, and the compressor idles without cooling. When the thermostat rises to the operating temperature, the compressor clutch engages, and the compressor starts cooling. This completely simulates the summer vehicle cooling test according to the vehicle's operating conditions.

[0098] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0099] Based on the same inventive concept, this application also provides an automotive air conditioning control device for implementing the above-mentioned automotive air conditioning control method. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the automotive air conditioning control device provided below can be found in the limitations of the automotive air conditioning control method described above, and will not be repeated here.

[0100] In one embodiment, such as Figure 6 As shown, a vehicle air conditioning control device is provided for controlling an air conditioning system in a vehicle that has not yet been fully assembled; it includes: a signal acquisition module 601, a data acquisition module 602, a first control module 603, and a second control module 604, wherein:

[0101] The signal acquisition module 601 is used to acquire the air conditioner test type signal and determine the type of the target working device in the air conditioner that provides the corresponding function based on the test type signal.

[0102] The numerical acquisition module 602 is used to acquire the target flow rate and target temperature of ethylene glycol in the air conditioning heating pipe when the target working device type is a heater and a water pump.

[0103] The first control module 603 is used to collect the real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe, and control the speed of the water pump based on the difference between the real-time flow rate and the target flow rate, so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0104] The second control module 604 is used to control the output of the heater based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0105] In one embodiment, the value acquisition module 602 is further configured to:

[0106] Based on the vehicle's speed, obtain at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle, and determine the target flow rate of ethylene glycol in the air conditioning and heating duct based on the at least two historical values.

[0107] The reference vehicle is equipped with an air conditioner of the same model as the air conditioner. The historical values ​​were collected during the historical driving process of the reference vehicle at its driving speed.

[0108] In one embodiment, the first control module 603 is further configured to:

[0109] The difference between the real-time flow rate and the target flow rate is input to the first PID controller. The difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

[0110] In one embodiment, the vehicle air conditioning control device further includes a target value acquisition module, a third control module, and a fourth control module, wherein:

[0111] The target value acquisition module is used to acquire the target values ​​of the compressor speed and the discharge pressure of the air conditioner when the target working device type is a compressor inverter and a condenser fan.

[0112] The third control module is used to collect the real-time values ​​of the compressor speed and the discharge pressure of the air conditioner. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the module controls the output of the compressor inverter so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than the third preset threshold.

[0113] The fourth control module is used to control the speed of the condenser fan based on the difference between the real-time value of the exhaust pressure and the target value of the exhaust pressure, so that the difference between the real-time value of the exhaust pressure and the target value of the exhaust pressure is less than the fourth preset threshold.

[0114] In one embodiment, the vehicle air conditioning control device further includes a fifth control module for:

[0115] The temperature of the air conditioner's thermostat is obtained. If the temperature of the thermostat is lower than the first preset temperature, the compressor's clutch is disengaged so that the compressor runs idle and does not cool.

[0116] When the temperature of the thermostat is higher than the second preset temperature, the compressor clutch is engaged to make the compressor cool; when the first preset temperature is lower than the second preset temperature.

[0117] In one embodiment, the third control module is further configured to:

[0118] The difference between the real-time compressor speed and the target compressor speed is input to the second PID controller. The difference between the real-time compressor speed and the target compressor speed is used to instruct the second PID controller to control the output of the compressor inverter.

[0119] The modules in the aforementioned vehicle air conditioning control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0120] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores data acquired by sensors. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements a vehicle air conditioning control method.

[0121] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0122] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0123] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0124] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0125] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0126] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0127] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0128] Based on the vehicle's speed, obtain at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle, and determine the target flow rate of ethylene glycol in the air conditioning and heating duct based on the at least two historical values.

[0129] The reference vehicle is equipped with an air conditioner of the same model as the air conditioner. The historical values ​​were collected during the historical driving process of the reference vehicle at its driving speed.

[0130] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0131] The difference between the real-time flow rate and the target flow rate is input to the first PID controller. The difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

[0132] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0133] When the target operating device type is a compressor inverter and a condenser fan, obtain the target values ​​of the compressor speed and discharge pressure of the air conditioner;

[0134] The real-time values ​​of the compressor speed and discharge pressure of the air conditioner are collected. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the output of the compressor inverter is controlled so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than the third preset threshold.

[0135] The speed of the condenser fan is controlled based on the difference between the real-time exhaust pressure value and the target exhaust pressure value, so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than the fourth preset threshold.

[0136] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0137] The temperature of the air conditioner's thermostat is obtained. If the temperature of the thermostat is lower than the first preset temperature, the compressor's clutch is disengaged so that the compressor runs idle and does not cool.

[0138] When the temperature of the thermostat is higher than the second preset temperature, the compressor clutch is engaged to make the compressor cool; when the first preset temperature is lower than the second preset temperature.

[0139] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0140] The difference between the real-time compressor speed and the target compressor speed is input to the second PID controller. The difference between the real-time compressor speed and the target compressor speed is used to instruct the second PID controller to control the output of the compressor inverter.

[0141] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0142] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0143] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0144] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0145] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0146] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0147] Based on the vehicle's speed, obtain at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle, and determine the target flow rate of ethylene glycol in the air conditioning and heating duct based on the at least two historical values.

[0148] The reference vehicle is equipped with an air conditioner of the same model as the air conditioner. The historical values ​​were collected during the historical driving process of the reference vehicle at its driving speed.

[0149] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0150] The difference between the real-time flow rate and the target flow rate is input to the first PID controller. The difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

[0151] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0152] When the target operating device type is a compressor inverter and a condenser fan, obtain the target values ​​of the compressor speed and discharge pressure of the air conditioner;

[0153] The real-time values ​​of the compressor speed and discharge pressure of the air conditioner are collected. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the output of the compressor inverter is controlled so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than the third preset threshold.

[0154] The speed of the condenser fan is controlled based on the difference between the real-time exhaust pressure value and the target exhaust pressure value, so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than the fourth preset threshold.

[0155] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0156] The temperature of the air conditioner's thermostat is obtained. If the temperature of the thermostat is lower than the first preset temperature, the compressor's clutch is disengaged so that the compressor runs idle and does not cool.

[0157] When the temperature of the thermostat is higher than the second preset temperature, the compressor clutch is engaged to make the compressor cool; when the first preset temperature is lower than the second preset temperature.

[0158] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0159] The difference between the real-time compressor speed and the target compressor speed is input to the second PID controller. The difference between the real-time compressor speed and the target compressor speed is used to instruct the second PID controller to control the output of the compressor inverter.

[0160] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0161] Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal;

[0162] When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature of ethylene glycol in the air conditioning heating duct;

[0163] The real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold.

[0164] The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold.

[0165] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0166] Based on the vehicle's speed, obtain at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle, and determine the target flow rate of ethylene glycol in the air conditioning and heating duct based on the at least two historical values.

[0167] The reference vehicle is equipped with an air conditioner of the same model as the air conditioner. The historical values ​​were collected during the historical driving process of the reference vehicle at its driving speed.

[0168] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0169] The difference between the real-time flow rate and the target flow rate is input to the first PID controller. The difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

[0170] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0171] When the target operating device type is a compressor inverter and a condenser fan, obtain the target values ​​of the compressor speed and discharge pressure of the air conditioner;

[0172] The real-time values ​​of the compressor speed and discharge pressure of the air conditioner are collected. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the output of the compressor inverter is controlled so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than the third preset threshold.

[0173] The speed of the condenser fan is controlled based on the difference between the real-time exhaust pressure value and the target exhaust pressure value, so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than the fourth preset threshold.

[0174] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0175] The temperature of the air conditioner's thermostat is obtained. If the temperature of the thermostat is lower than the first preset temperature, the compressor's clutch is disengaged so that the compressor runs idle and does not cool.

[0176] When the temperature of the thermostat is higher than the second preset temperature, the compressor clutch is engaged to make the compressor cool; when the first preset temperature is lower than the second preset temperature.

[0177] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0178] The difference between the real-time compressor speed and the target compressor speed is input to the second PID controller. The difference between the real-time compressor speed and the target compressor speed is used to instruct the second PID controller to control the output of the compressor inverter.

[0179] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0180] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0181] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for controlling an automotive air conditioner, characterized in that, The method is applied to control the air conditioning system of an incomplete vehicle assembly; the method includes: Acquire the air conditioner test type signal, and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal; When the target working device type is a heater and a water pump, obtain the target flow rate and target temperature value of ethylene glycol in the air conditioning heating pipe; The flow rate and temperature of ethylene glycol in the air conditioning heating pipe are collected in real time. Based on the difference between the real-time flow rate and the target flow rate, the speed of the water pump is controlled so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold. The output of the heater is controlled based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold. The air conditioning test type signal includes vehicle speed; correspondingly, the process of obtaining the target flow rate of ethylene glycol in the air conditioning heating duct includes: Based on the vehicle's driving speed, at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning and heating duct of the reference vehicle are obtained, and a target value of the flow rate of ethylene glycol in the air conditioning and heating duct is determined based on the at least two historical values. The reference vehicle is equipped with an air conditioner of the same model as the air conditioner, and the historical values ​​are collected during the historical driving process of the reference vehicle at the vehicle's driving speed.

2. The method according to claim 1, characterized in that, The step of controlling the pump speed based on the difference between the real-time flow rate and the target flow rate includes: The difference between the real-time flow rate and the target flow rate is input to the first PID controller, and the difference between the real-time flow rate and the target flow rate is used to instruct the first PID controller to control the speed of the water pump.

3. The method according to claim 1, characterized in that, The method further includes: When the target operating device type is a compressor inverter and a condenser fan, obtain the target values ​​of the compressor speed and the exhaust pressure of the air conditioner; The real-time values ​​of the compressor speed and discharge pressure of the air conditioner are collected. Based on the difference between the real-time value of the compressor speed and the target value of the compressor speed, the output of the compressor inverter is controlled so that the difference between the real-time value of the compressor speed and the target value of the compressor speed is less than a third preset threshold. The speed of the condenser fan is controlled based on the difference between the real-time exhaust pressure value and the target exhaust pressure value, so that the difference between the real-time exhaust pressure value and the target exhaust pressure value is less than a fourth preset threshold.

4. The method according to claim 3, characterized in that, The method further includes: The temperature of the air conditioner's thermostat is obtained. If the temperature of the thermostat is lower than a first preset temperature, the clutch of the compressor is disengaged so that the compressor runs idle and does not cool. When the temperature of the thermostat is greater than the second preset temperature, the clutch of the compressor inverter is controlled to engage so that the compressor can cool; the first preset temperature is less than the second preset temperature.

5. The method according to claim 3, characterized in that, The step of controlling the output of the compressor inverter based on the difference between the real-time compressor speed value and the target compressor speed value includes: The difference between the real-time compressor speed value and the target compressor speed value is input to the second PID controller. The difference between the real-time compressor speed value and the target compressor speed value is used to indicate the output of the second PID controller to control the compressor inverter.

6. A vehicle air conditioning control device, characterized in that, An apparatus for controlling an air conditioner in a vehicle before assembly is complete; the apparatus includes: The signal acquisition module is used to acquire the air conditioner test type signal and determine the type of target working device in the air conditioner that provides the corresponding function based on the test type signal. The numerical acquisition module is used to acquire the target flow rate and target temperature of ethylene glycol in the air conditioning heating pipe when the target working device type is a heater and a water pump. The first control module is used to collect the real-time flow rate and temperature of ethylene glycol in the air conditioning heating pipe, and control the speed of the water pump according to the difference between the real-time flow rate and the target flow rate, so that the difference between the real-time flow rate and the target flow rate is less than a first preset threshold. The second control module is used to control the output of the heater based on the difference between the real-time temperature value and the target temperature value, so that the difference between the real-time temperature value and the target temperature value is less than a second preset threshold. The air conditioning test type signal includes the vehicle speed; correspondingly, the numerical acquisition module is also used to acquire at least two historical values ​​of the flow rate of ethylene glycol in the air conditioning heating pipe of the reference vehicle based on the vehicle speed, and to determine the target flow rate of ethylene glycol in the air conditioning heating pipe based on the at least two historical values; the reference vehicle is equipped with an air conditioner of the same model as the air conditioner, and the historical values ​​are collected during the historical driving process of the reference vehicle at the vehicle speed.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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