A vehicle air conditioning control method, system, device and medium

Abstract

The application discloses a kind of vehicle air conditioner control methods, comprising: obtaining air conditioner control influence factor;Based on the air conditioner control influence factor and air conditioner control influence factor corresponding calibration curve, the calibration variable of air conditioner control influence factor is determined;The calibration curve indicates the corresponding relationship of air conditioner control influence factor and calibration variable;Feedforward term and closed loop control term are calculated by the air conditioner control influence factor, air conditioner control influence factor corresponding calibration curve, and the desired air outlet temperature is calculated according to the feedforward term and the closed loop control term.The application can determine different variable parameters according to different working conditions, improve the control accuracy of vehicle-mounted air conditioner, and also improve the passenger's ride experience.

Description

Technical Field

[0001] This invention belongs to the field of vehicle air conditioning technology, specifically relating to a vehicle air conditioning control method, system, device, and storage medium. Background Technology

[0002] Vehicle thermal management is a crucial component of pure electric vehicles. The thermal management system for new energy vehicles typically includes thermal management of high-voltage components (such as chargers, power batteries, DC-DC converters, DC-AC converters, drive motors, and motor controllers—where the maximum coolant temperature for drive motors and motor controllers is below 65°C, while the optimal operating temperature for power batteries is 25-45°C) and passenger compartment thermal management (ensuring a comfortable passenger compartment temperature between 22-28°C, while also meeting the requirements for windshield defrosting and defogging). Therefore, the thermal management system must meet the cooling or heating needs of all parts of the vehicle.

[0003] Passenger compartment thermal management is divided into manual and automatic air conditioning. Traditional manual air conditioning relies on manual adjustment, with each setting corresponding to a fixed target temperature. This easily leads to excessively high or low interior temperatures, requiring users to manually adjust the air conditioning again to adjust the temperature and airflow. To improve vehicle comfort and safety, most vehicles now feature automatic air conditioning, employing automatic temperature and airflow control methods. However, existing automatic temperature and airflow control methods suffer from poor control precision, impacting the passenger experience. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the present invention provides a vehicle air conditioning control method, a vehicle air conditioning control system, a vehicle air conditioning control device, and a computer-readable storage medium to solve the technical problems.

[0005] According to one aspect of the present invention, a vehicle air conditioning control method is provided, comprising:

[0006] Obtain the factors affecting air conditioning control;

[0007] Based on the air conditioning control influencing factors and the corresponding calibration curves, calibration variables for the air conditioning control influencing factors are determined; the calibration curves represent the correspondence between the air conditioning control influencing factors and the calibration variables; the air conditioning control influencing factors include at least one of the following: user-set target temperature, in-vehicle temperature, outside vehicle temperature, and solar radiation intensity; the calibration variables for the air conditioning control influencing factors include at least one of the following: proportional gain of temperature difference, integral gain of temperature difference, outside vehicle temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable, wherein the temperature difference is the difference between the target temperature and the in-vehicle temperature;

[0008] The feedforward term and closed-loop control term are calculated using the air conditioning control influencing factors and the corresponding calibration curves. The desired outlet air temperature is then calculated based on the feedforward term and the closed-loop control term.

[0009] In one embodiment of the present invention, the method further includes: controlling at least one of the following according to the desired outlet air temperature: the opening of the temperature mixing damper, the blower air volume, the outlet air mode, and the opening of the internal and external circulation dampers.

[0010] In one embodiment of the present invention, the desired outlet air temperature is:

[0011] DVT = DVTFf + DVTPi;

[0012] DVTFf=KSet*TSet-Kam*TAmb-Ks*Ts;

[0013] DVTPi=KErr(TSet-TCbn)+Ki∫(TSet-TCbn)dt;

[0014] Wherein, DVT is the desired outlet air temperature, DVTFf is the feedforward term of DVT, DVTPi is the closed-loop control term of DVT, KSet is the target temperature calibration variable, TSet is the target temperature, Kam is the vehicle outside temperature calibration variable, TAmb is the vehicle outside temperature, Ks is the solar radiation intensity calibration variable, Ts is the solar radiation intensity, KErr is the proportional gain, TCbn is the vehicle interior temperature, and Ki is the integral gain.

[0015] In one embodiment of the present invention, controlling the opening degree of the temperature mixing damper according to the desired outlet air temperature includes:

[0016] Obtain the engine coolant temperature, evaporator outlet temperature, and actual outlet air temperature of the temperature mixing damper;

[0017] If the desired outlet air temperature is less than the evaporator outlet temperature, then the opening degree of the temperature mixing damper is set to the first opening degree value.

[0018] If the desired outlet air temperature is greater than the engine coolant temperature, then the temperature mixing damper opening is set to the second opening value.

[0019] If the desired air outlet temperature is greater than or equal to the evaporator outlet temperature and less than or equal to the engine coolant temperature, then the temperature mixing damper opening is calculated based on the temperature mixing damper opening, the engine coolant temperature, the evaporator outlet temperature, and the actual air outlet temperature.

[0020] In one embodiment of the present invention, the opening degree of the temperature mixing damper is:

[0021] SW = SWFf + SWClslp;

[0022] SWFf=(DVT-Te) / MAX[10,Tw-Te];

[0023] Where SW is the opening of the temperature mixing damper, SWFf is the feedforward term for the temperature mixing damper control, SWClslp is the closed-loop control term for the temperature mixing damper control, DVT is the desired outlet air temperature, Te is the evaporator outlet temperature, and Tw is the engine coolant temperature. When the actual outlet air temperature is less than the target outlet air temperature, SWClslp = SWClslpPre + SWClslpStep; when the actual outlet air temperature is greater than the target outlet air temperature, SWClslp = SWClslpPre - SWClslpStep; when the actual outlet air temperature is equal to the target outlet air temperature, SWClslp remains unchanged. SWClslpPre is the value of SWClslp in the previous control cycle, and SWClslpStep is the calibration variable for the difference between the target temperature mixing damper opening and the current temperature mixing damper opening.

[0024] In one embodiment of the present invention, controlling the blower air volume according to the desired outlet air temperature includes:

[0025] If the set temperature is the maximum or minimum set temperature value, the blower air volume will be the maximum value of the preset blower air volume;

[0026] If the set temperature is between the maximum set temperature value and the minimum set temperature value, then the air volume pulse spectrum to be retrieved is determined according to the outside temperature of the vehicle, and the output air volume of the blower is obtained based on the air volume pulse spectrum to be retrieved and the desired outlet air temperature. The air volume pulse spectrum contains the correspondence between the desired outlet air temperature and the blower air volume, and the air volume pulse spectrum includes a first air volume pulse spectrum, a second air volume pulse spectrum, and a third air volume pulse spectrum.

[0027] If the outside temperature is greater than the first outside temperature threshold, retrieve the first airflow pulse spectrum.

[0028] If the outside temperature is lower than the second outside temperature threshold, retrieve the second airflow pulse spectrum.

[0029] If the outside temperature is less than or equal to the first outside temperature threshold and greater than or equal to the second outside temperature threshold, retrieve the third airflow pulse spectrum.

[0030] In one embodiment of the present invention, controlling the air outlet mode according to the desired air outlet temperature includes:

[0031] The target mode damper opening is obtained by searching based on the mode damper pulse spectrum and the desired outlet air temperature. The mode damper pulse spectrum contains the correspondence between the desired outlet air temperature and the target mode damper opening.

[0032] In one embodiment of the present invention, controlling the opening degree of the internal and external circulation dampers according to the desired outlet air temperature includes:

[0033] The target circulation damper opening is obtained by searching based on the circulation damper pulse spectrum and the desired outlet air temperature. The circulation damper pulse spectrum contains the correspondence between the desired outlet air temperature and the target circulation damper opening.

[0034] According to one aspect of the present invention, a vehicle air conditioning control system is also provided, the system comprising:

[0035] The acquisition module is used to acquire multiple factors affecting air conditioning control;

[0036] The first calculation module is used to determine the calibration variables of the air conditioning control influencing factors based on the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors; the calibration curves represent the correspondence between the air conditioning control influencing factors and the calibration variables; the air conditioning control influencing factors include at least one of the following: user-set target temperature, in-vehicle temperature, outside vehicle temperature, and solar radiation intensity; the calibration variables of the air conditioning control influencing factors include at least one of the following: proportional gain of temperature difference, integral gain of temperature difference, outside vehicle temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable, wherein the temperature difference is the difference between the target temperature and the in-vehicle temperature;

[0037] The second calculation module is used to calculate the feedforward term and the closed-loop control term through the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors, and to calculate the desired outlet air temperature based on the feedforward term and the closed-loop control term.

[0038] According to one aspect of the present invention, a vehicle air conditioning control device is also provided, comprising: one or more processors; and a storage system for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the vehicle air conditioning control device enables any one of the vehicle air conditioning control methods.

[0039] According to one aspect of the present invention, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a computer processor, causes the computer to perform any of the vehicle air conditioning control methods.

[0040] The beneficial effects of this invention are:

[0041] The vehicle air conditioning control method of the present invention includes: acquiring air conditioning control influencing factors; determining calibration variables of air conditioning control influencing factors based on the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors; the calibration curves representing the correspondence between air conditioning control influencing factors and calibration variables; calculating feedforward terms and closed-loop control terms through the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors, and calculating the desired air outlet temperature based on the feedforward terms and the closed-loop control terms; the present invention calculates feedforward terms and closed-loop control terms through the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors, and the variables corresponding to each air conditioning control influencing factor are calculated based on calibration data, which can determine different variable parameters according to different operating conditions, improve the control accuracy of vehicle air conditioning, and also improve the passenger riding experience.

[0042] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0044] Figure 1 This is a flowchart illustrating a vehicle air conditioning control method in an exemplary embodiment of this application;

[0045] Figure 2 This is a first airflow pulse pattern shown in an exemplary embodiment of this application;

[0046] Figure 3 This is a second airflow pulse pattern shown in an exemplary embodiment of this application;

[0047] Figure 4 This is a third airflow pulse pattern shown in an exemplary embodiment of this application;

[0048] Figure 5 This is a pattern of pleural pulse spectrum shown in an exemplary embodiment of this application;

[0049] Figure 6 This is a circulating damper pulse pattern shown in an exemplary embodiment of this application;

[0050] Figure 7 This is a block diagram illustrating a vehicle air conditioning control system, as shown in an exemplary embodiment of this application.

[0051] Figure 8 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0052] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0053] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0054] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0055] First, it's important to clarify that feedforward control is a control strategy within a control system. It works by predicting future disturbances or interference signals and adjusting the system in advance to achieve better control. Feedforward control can be implemented using predictive models or real-time measurements. When a disturbance occurs in the system, it is immediately measured, and the feedforward controller adjusts the control input according to the magnitude of the disturbance to offset or reduce its impact on the controlled variable. The advantage of feedforward control is its ability to effectively compensate for system disturbances, improving system robustness and control accuracy. However, feedforward control also has some disadvantages, such as requiring relatively accurate system modeling and being sensitive to changes in system parameters. Therefore, in practical applications, it is necessary to select an appropriate control strategy based on specific circumstances.

[0056] PI (Proportional-Integral) control is a commonly used closed-loop control strategy for error regulation in systems. The PI controller combines proportional and integral control. Proportional control directly converts the error into the control output through proportional gain, while integral control integrates the error through integral gain and accumulates the integral result as part of the control output. The PI controller combines the fast response of the P controller with the stability of the I controller, and therefore has been widely used in many fields, such as various control systems in electrical, mechanical, and chemical engineering.

[0057] Proportional control uses the current value for control. It multiplies the error between the setpoint and the current input by a proportional coefficient K, and then uses this product to calculate the control module output. Integral control uses past values ​​for control. It multiplies the sum of errors over a past period (a constant) by a constant Ki, and then uses this product to calculate the control module output. The output of integral control is proportional to the integral of the input deviation over time. The magnitude of the constant characterizes the strength of the integral control action. The smaller the constant, the stronger the control action; conversely, the larger the constant, the weaker the control action.

[0058] The vehicle thermal management system is a crucial component of pure electric vehicles. New energy vehicle thermal management systems typically include high-voltage component thermal management (including heat-generating components such as the charger, power battery, DC-DC converter, DC-AC converter, drive motor, and motor controller; the maximum coolant temperature for components like the drive motor and motor controller is below 65°C, while the optimal operating temperature for the power battery is 25-45°C) and passenger compartment thermal management (ensuring a comfortable passenger compartment temperature between 22-28°C, while also meeting the requirements for windshield defrosting and defogging). Therefore, the thermal management system must meet the cooling or heating needs of all parts of the vehicle.

[0059] Passenger compartment thermal management is divided into manual and automatic air conditioning. Traditional manual air conditioning relies on manual adjustment, with each setting corresponding to a fixed target temperature. This easily leads to excessively high or low interior temperatures, requiring users to manually adjust the air conditioning again to adjust the temperature and airflow. To improve vehicle comfort and safety, most vehicles now feature automatic air conditioning, employing automatic temperature and airflow control methods. However, existing automatic temperature and airflow control methods often use open-loop control or constant control coefficients, resulting in poor control accuracy. This makes it difficult to accurately control the opening of the temperature mixing damper, airflow, air outlet mode, and internal / external circulation, ultimately impacting the passenger experience.

[0060] The problems mentioned above are universally applicable in implementation environments based on vehicle air conditioning control. It can be seen that existing automatic air conditioning control methods often suffer from poor air conditioning control accuracy. To solve these problems, embodiments of this application propose a vehicle air conditioning control method, a vehicle air conditioning control device, a vehicle air conditioning control equipment, and a storage medium, which will be described in detail below.

[0061] Please see Figure 1 , Figure 1 This is a flowchart illustrating a vehicle air conditioning control method in an exemplary embodiment of this application. This method can be applied to scenarios involving air conditioning control in new energy vehicles and is specifically configured in on-board equipment. It should be understood that this method can also be applied to other exemplary implementation environments and executed by devices in those environments; this embodiment does not limit the implementation environment to which the method is applicable.

[0062] like Figure 1 As shown in the flowchart of an exemplary vehicle air conditioning control method, the vehicle air conditioning control method includes at least steps S210 to S240, which are described in detail below:

[0063] S210. Obtain factors affecting air conditioning control;

[0064] S220. Based on the air conditioning control influencing factors and the corresponding calibration curves, determine the calibration variables of the air conditioning control influencing factors; the calibration curves represent the correspondence between the air conditioning control influencing factors and the calibration variables; the air conditioning control influencing factors include at least one of the following: user-set target temperature, in-vehicle temperature, outside vehicle temperature, and solar radiation intensity; the calibration variables of the air conditioning control influencing factors include at least one of the following: proportional gain of temperature difference, integral gain of temperature difference, outside vehicle temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable, wherein the temperature difference is the difference between the target temperature and the in-vehicle temperature;

[0065] In one embodiment, the calibration curve is obtained through multiple calibration functions.

[0066] In one embodiment, the calibration function is obtained by the linear difference between two adjacent calibration data points. For example, when the set temperature is 19 degrees Celsius, according to Table 1, the two adjacent calibration data points for the set temperature are (18, 5.5) and (20, 6). Calculating the linear difference between these two points yields the calibration function y = a1x + b1 (where a1 and b1 are constants). Substituting 19 into x yields the target temperature calibration variable y when the set temperature is 19 degrees Celsius. When the set temperature is 21 degrees Celsius, according to Table 1, the two adjacent calibration data points for the set temperature are (20, 6) and (22, 6.5). Calculating the linear difference between these two points yields the linear function y = a2x + b2 (where a2 and b2 are constants). Substituting 21 into x yields the target temperature calibration variable y when the set temperature is 21 degrees Celsius. Unlike existing technologies where calibration variables are set to fixed constant values, the method used in this embodiment can determine different calibration variables according to different temperatures or irradiation ranges for more precise control.

[0067] In one embodiment, calibration data points can be obtained from the data table of actual vehicle calibration. Each calibration data point includes an air conditioning control influencing factor and the corresponding calibration variable, as shown in Tables 1 to 5. Wherein, TSet is the target temperature, KSet is the target temperature calibration variable, LO is the minimum settable value of the target temperature, HI is the maximum settable value of the target temperature, TAmb is the outside temperature, Kam is the outside temperature calibration variable, Ts is the solar radiation intensity, Ks is the solar radiation intensity calibration variable, TCbn is the indoor temperature, Kerr is the proportional gain, and Ki is the integral gain.

[0068] It should be understood that vehicle calibration is the process of testing the accuracy of instruments or measurement systems to determine the relationship between their inputs and outputs.

[0069] Table 1

[0070] LO 5 18 5.5 20 6 22 6.5 25 7 28 7.5 30 8 32 9 HI 9.5

[0071] Table 2

[0072] -40 1.20 -30 1.18 -20 1.16 -10 1.14 0 1.12 10 1.10 18 1.10 20 1.10 22 1.10 25 1.10 28 1.08 30 1.06 35 1.03 40 1.01 45 0.99 50 0.97

[0073] Table 3

[0074] 0 0 150 1.35 300 1.4 450 1.45 600 1.50 750 1.55 900 1.60 1050 1.65 1200 1.70

[0075] Table 4

[0076]

[0077]

[0078] Table 5

[0079] -40 0.10 -20 0.09 -10 0.08 -5 0.07 -3 0.06 -1 0.05 -0.5 0 0 0 0.5 0 1 0.05 3 0.06 5 0.07 10 0.08 20 0.09

[0080] S230. The feedforward term and closed-loop control term are calculated by the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors. The desired air outlet temperature is calculated based on the feedforward term and the closed-loop control term.

[0081] In one embodiment, a feedforward term is calculated using the target temperature, outside temperature, solar radiation intensity, outside temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable. A closed-loop control term is calculated using the temperature difference, proportional gain, and integral gain. The desired outlet air temperature is then calculated based on the feedforward term and the closed-loop control term.

[0082] In one embodiment, the desired outlet air temperature is:

[0083] DVT = DVTFf + DVTPi

[0084] DVTFf=KSet∫TSet-Kam*TAmb-Ks*Ts

[0085] DVTPi=KErr(TSet-TCbn)+Ki∫(TSet-TCbn)dt;

[0086] Wherein, DVT is the desired outlet air temperature, DVTFf is the feedforward term of DVT, DVTPi is the closed-loop control term of DVT, KSet is the target temperature calibration variable, TSet is the target temperature, Kam is the vehicle outside temperature calibration variable, TAmb is the vehicle outside temperature, Ks is the solar radiation intensity calibration variable, Ts is the solar radiation intensity, Kerr is the proportional gain, TCbn is the vehicle interior temperature, and Ki is the integral gain.

[0087] In one embodiment, the vehicle air conditioning control method further includes controlling at least one of the following: temperature mixing damper opening, blower air volume, air outlet mode, and internal / external circulation damper opening, based on the desired air outlet temperature.

[0088] In one embodiment, controlling the opening of the temperature mixing damper according to the desired outlet air temperature includes: obtaining the engine coolant temperature, the evaporator outlet temperature, and the actual outlet air temperature of the temperature mixing damper; if the desired outlet air temperature is less than the evaporator outlet temperature, setting the opening of the temperature mixing damper to a first opening value; if the desired outlet air temperature is greater than the engine coolant temperature, setting the opening of the temperature mixing damper to a second opening value; if the desired outlet air temperature is greater than or equal to the evaporator outlet temperature and less than or equal to the engine coolant temperature, calculating the opening of the temperature mixing damper based on the opening of the temperature mixing damper, the engine coolant temperature, the evaporator outlet temperature, and the actual outlet air temperature.

[0089] In one embodiment, the opening degree of the temperature mixing damper is:

[0090] SW = SWFf + SWClslp;

[0091] SWFf=(DVT-Te) / MAX[10,Tw-Te];

[0092] Where SW is the opening of the temperature mixing damper, SWFf is the feedforward term for the temperature mixing damper control, SWClslp is the closed-loop control term for the temperature mixing damper control, DVT is the desired outlet air temperature, Te is the evaporator outlet temperature, and Tw is the engine coolant temperature. When the actual outlet air temperature is less than the target outlet air temperature, SWClslp = SWClslpPre + SWClslpStep; when the actual outlet air temperature is greater than the target outlet air temperature, SWClslp = SWClslpPre - SWClslpStep; when the actual outlet air temperature is equal to the target outlet air temperature, SWClslp remains unchanged. SWClslpPre is the value of SWClslp in the previous control cycle, and SWClslpStep is the calibration variable for the difference between the target temperature mixing damper opening and the current temperature mixing damper opening.

[0093] In one embodiment, the calibration variable for the difference between the target temperature mixing damper opening and the current temperature mixing damper opening is obtained through actual vehicle calibration, as shown in Table 6. SWClslpStep is the calibration variable for the difference between the target temperature mixing damper opening and the current temperature mixing damper opening.

[0094] Table 6

[0095]

[0096]

[0097] Please see Figures 2-4 , Figure 2 This is a first airflow pulse pattern shown in an exemplary embodiment of this application. Figure 3 This is a second airflow pulse pattern shown in an exemplary embodiment of this application. Figure 4 This is a third airflow pulse pattern shown in an exemplary embodiment of this application.

[0098] Controlling the blower airflow based on the desired outlet air temperature includes: if the set temperature is the maximum or minimum set temperature value, the blower airflow is the maximum value of the preset blower airflow; if the set temperature is between the maximum and minimum set temperature values, the airflow pulse map to be retrieved is determined based on the outside temperature, and a retrieval is performed based on the airflow pulse map to be retrieved and the desired outlet air temperature to obtain the blower output airflow. The airflow pulse map contains the correspondence between the desired outlet air temperature and the blower airflow, and includes a first airflow pulse map, a second airflow pulse map, and a third airflow pulse map; if the outside temperature is greater than a first outside temperature threshold, the first airflow pulse map is retrieved; if the outside temperature is less than a second outside temperature threshold, the second airflow pulse map is retrieved; if the outside temperature is less than or equal to the first outside temperature threshold and greater than or equal to the second outside temperature threshold, the third airflow pulse map is retrieved.

[0099] In one embodiment, the first airflow pulse spectrum is applicable to summer, the third airflow pulse spectrum is applicable to winter, and the fourth airflow pulse spectrum is applicable to spring and autumn. The first vehicle outside temperature threshold is 30 degrees Celsius, and the second vehicle outside temperature threshold is 0 degrees Celsius. The airflow pulse spectrum is obtained through actual vehicle calibration. The general calibration principle is that when the desired outlet air temperature is at a normal value, the blower speed is lower, and when the desired outlet air temperature is higher or lower, i.e., higher cooling or higher heating is required, the blower speed is higher.

[0100] Please see Figure 5 , Figure 5 This is a mode damper pulse spectrum diagram shown in an exemplary embodiment of this application. In one embodiment, controlling the air outlet mode according to the desired air outlet temperature includes: retrieving the target mode damper opening based on the mode damper pulse spectrum diagram and the desired air outlet temperature, wherein the mode damper pulse spectrum diagram contains the correspondence between the desired air outlet temperature and the target mode damper opening.

[0101] like Figure 5 As shown, in one embodiment, if the desired outlet air temperature is between DVT1L and DVT1H, the target mode damper opening is the opening corresponding to the face blowing mode; if the desired outlet air temperature is between DVT2L and DVT2H, the target mode damper opening is the opening corresponding to the face blowing and foot blowing mode; if the desired outlet air temperature is between DVT3L and DVT3H, the target mode damper opening is the opening corresponding to the foot blowing mode; if the desired outlet air temperature is between DVT4L and DVT4H, the target mode damper opening is the opening corresponding to the foot blowing and defrosting mode; if the desired outlet air temperature is between DVT5L and DVT5H, the target mode damper opening is the opening corresponding to the defrosting mode.

[0102] Please see Figure 6 , Figure 6This is a circulating damper pulse spectrum diagram shown in an exemplary embodiment of this application. In one embodiment, controlling the opening degree of the inner and outer circulating dampers according to the desired outlet air temperature includes: retrieving a target circulating damper opening degree based on the circulating damper pulse spectrum diagram and the desired outlet air temperature, wherein the circulating damper pulse spectrum diagram contains the correspondence between the desired outlet air temperature and the target circulating damper opening degree.

[0103] like Figure 6 As shown, in one embodiment, if the desired outlet air temperature is ≤ DVTThd1 or ≥ DVTThd4, the target circulation damper opening is the opening corresponding to the inner circulation; if DVTThd2 ≤ desired outlet air temperature ≤ DVTThd4, the target circulation damper opening is the opening corresponding to the outer circulation. When the desired outlet air temperature is low (e.g., high cooling capacity is required), the inner and outer circulation dampers are turned to the inner circulation position (damper opening 0%), which can greatly improve cooling efficiency; when the desired outlet air temperature is high (e.g., high heating capacity is required), the inner and outer circulation dampers are turned to the inner circulation position (damper opening 0%), which can greatly improve heating efficiency; when the desired outlet air temperature is generally high (e.g., in spring and autumn), fresh air is usually drawn in, and the inner and outer circulation dampers are turned to the outer circulation position (damper opening 100%).

[0104] Therefore, it can be seen that the present invention calculates the feedforward term and closed-loop control term through the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors. Moreover, the variables corresponding to each air conditioning control influencing factor are calculated based on the calibration data. Different variable parameters can be determined according to different operating conditions, which improves the control accuracy of the vehicle air conditioning and also improves the passenger's riding experience.

[0105] It should be understood that the sequence number of each step in the embodiment does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0106] Figure 7 This is a block diagram illustrating a vehicle air conditioning control system according to an exemplary embodiment of this application. This system can be applied to scenarios involving air conditioning control in new energy vehicles and is specifically configured in on-board equipment. The system can also be applied to other exemplary implementation environments and specifically configured in other devices; this embodiment does not limit the implementation environment to which the system is applicable.

[0107] like Figure 7 As shown, this application provides a vehicle air conditioning control system, which includes:

[0108] Module 701 is used to acquire multiple factors affecting air conditioning control;

[0109] The first calculation module 702 is used to determine the calibration variables of the air conditioning control influencing factors based on the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors; the calibration curves represent the correspondence between the air conditioning control influencing factors and the calibration variables; the air conditioning control influencing factors include at least one of the following: user-set target temperature, in-vehicle temperature, outside vehicle temperature, and solar radiation intensity; the calibration variables of the air conditioning control influencing factors include at least one of the following: proportional gain of temperature difference, integral gain of temperature difference, outside vehicle temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable, wherein the temperature difference is the difference between the target temperature and the in-vehicle temperature;

[0110] The second calculation module 703 is used to calculate the feedforward term and the closed-loop control term through the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors, and to calculate the desired air outlet temperature based on the feedforward term and the closed-loop control term.

[0111] It should be noted that the vehicle air conditioning control system provided in the embodiments and the vehicle air conditioning control method provided in the embodiments belong to the same concept. The specific ways in which each module and unit performs operations have been described in detail in the method embodiments, and will not be repeated here. In practical applications, the vehicle air conditioning control system provided in the embodiments can be configured to perform functions by different functional modules as needed, that is, the internal structure of the system can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0112] Embodiments of this application also provide a vehicle air conditioning control device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the vehicle air conditioning control device to implement the vehicle air conditioning control method provided in various embodiments.

[0113] Figure 8 A schematic diagram of a computer system suitable for implementing the vehicle air conditioning control device of the embodiments of this application is shown. It should be noted that... Figure 8 The computer system 800 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0114] like Figure 8As shown, the computer system 800 includes a Central Processing Unit (CPU) 801, which can perform various appropriate actions and processes, such as those described in the embodiments, based on programs stored in Read-Only Memory (ROM) 802 or programs loaded from storage portion 808 into Random Access Memory (RAM) 803. The RAM 803 also stores various programs and data required for system operation. The CPU 801, ROM 802, and RAM 803 are interconnected via a bus 804. An Input / Output (I / O) interface 805 is also connected to the bus 804.

[0115] The following components are connected to I / O interface 805: an input section 806 including a keyboard, mouse, etc.; an output section 807 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 808 including a hard disk, etc.; and a communication section 809 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 809 performs communication processing via a network such as the Internet. A drive 810 is also connected to I / O interface 805 as needed. A removable medium 811, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 810 as needed so that computer programs read from it can be installed into storage section 808 as needed.

[0116] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 809, and / or installed from removable medium 811. When the computer program is executed by central processing unit (CPU) 801, it performs various functions defined in the system of this application.

[0117] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program contained on a computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0118] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0119] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0120] Another aspect of this application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a computer's processor, causes the computer to perform the vehicle air conditioning control method as described above. This computer-readable storage medium may be included in the electronic device described in the embodiments, or it may exist independently and not incorporated into the electronic device.

[0121] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the vehicle air conditioning control method provided in various embodiments.

[0122] The embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the embodiments without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A vehicle air conditioning control method, characterized in that, The method includes: Obtain the factors affecting air conditioning control; Based on the air conditioning control influencing factors and the corresponding calibration curves, calibration variables for the air conditioning control influencing factors are determined. The calibration curves are constructed from multiple calibration data points obtained from actual vehicle calibration, used to represent the correspondence between the air conditioning control influencing factors and the calibration variables. The calibration data points are the corresponding calibration data points of the air conditioning control influencing factors and the calibration variables. The air conditioning control influencing factors include at least one of the following: user-set target temperature, in-vehicle temperature, outside vehicle temperature, and solar radiation intensity. The calibration variables for the air conditioning control influencing factors include at least one of the following: proportional gain of temperature difference, integral gain of temperature difference, outside vehicle temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable, wherein the temperature difference is the difference between the target temperature and the in-vehicle temperature. The feedforward term and closed-loop control term are calculated using the air conditioning control influencing factors and their corresponding calibration curves. The desired outlet air temperature is then calculated based on the feedforward term and the closed-loop control term. The desired outlet air temperature is: ； ； ； in, DVT This is the desired outlet air temperature value. DVTFf yes DVT feedforward term, DVTPi yes DVT Closed-loop control items, KSet The target temperature is the calibration variable, and TSet is the target temperature. Kam It is the outside temperature calibration variable. TAmb It's the outside temperature of the car. Ks It is the calibration variable for solar radiation intensity. Ts It is the intensity of solar radiation. KErr It is proportional gain. TCbn It's the temperature inside the car. Ki It is the integral gain.

2. The vehicle air conditioning control method according to claim 1, characterized in that, The method further includes controlling at least one of the following based on the desired outlet air temperature: the opening of the temperature mixing damper, the blower air volume, the outlet air mode, and the opening of the internal and external circulation dampers.

3. The vehicle air conditioning control method according to claim 1, characterized in that, The opening degree of the temperature mixing damper is controlled according to the desired outlet air temperature, including: Obtain the engine coolant temperature, evaporator outlet temperature, and actual outlet air temperature of the temperature mixing damper; If the desired outlet air temperature is less than the evaporator outlet temperature, then the opening degree of the temperature mixing damper is set to the first opening degree value. If the desired outlet air temperature is greater than the engine coolant temperature, then the temperature mixing damper opening is set to the second opening value. If the desired air outlet temperature is greater than or equal to the evaporator outlet temperature and less than or equal to the engine coolant temperature, then the temperature mixing damper opening is calculated based on the temperature mixing damper opening, the engine coolant temperature, the evaporator outlet temperature, and the actual air outlet temperature.

4. The vehicle air conditioning control method according to claim 3, characterized in that, The opening degree of the temperature mixing damper is: ； ； in, SW The opening degree of the temperature mixing damper. SWFf For the temperature mixing damper control feedforward term, SWClslp This is a closed-loop control term for the temperature mixing damper control. DVT The desired outlet air temperature value, Te This is the evaporator outlet temperature value. Tw This refers to the engine coolant temperature; when the actual outlet air temperature is lower than the target outlet air temperature... SWClslp = SWClslpPre + SWClslpStep When the actual outlet air temperature is greater than the target outlet air temperature, SWClslp = SWClslpPre - SWClslpStep When the actual outlet air temperature equals the target outlet air temperature, SWClslp Keep the current value unchanged; SWClslpPre for SWClslp The value of the previous control cycle, SWClslpStep The calibration variable is the difference between the opening of the target temperature mixing damper and the opening of the current temperature mixing damper.

5. The vehicle air conditioning control method according to claim 1, characterized in that, Controlling the blower air volume according to the desired outlet air temperature includes: If the set temperature is the maximum or minimum set temperature value, the blower air volume will be the maximum value of the preset blower air volume. If the set temperature is between the maximum set temperature value and the minimum set temperature value, then the air volume pulse spectrum to be retrieved is determined according to the outside temperature of the vehicle, and the output air volume of the blower is obtained based on the air volume pulse spectrum to be retrieved and the desired outlet air temperature. The air volume pulse spectrum contains the correspondence between the desired outlet air temperature and the blower air volume, and the air volume pulse spectrum includes a first air volume pulse spectrum, a second air volume pulse spectrum, and a third air volume pulse spectrum. If the outside temperature is greater than the first outside temperature threshold, retrieve the first airflow pulse spectrum. If the outside temperature is lower than the second outside temperature threshold, retrieve the second airflow pulse spectrum. If the outside temperature is less than or equal to the first outside temperature threshold and greater than or equal to the second outside temperature threshold, retrieve the third airflow pulse spectrum.

6. The vehicle air conditioning control method according to claim 1, characterized in that, The air outlet mode is controlled according to the desired air outlet temperature, including: The target mode damper opening is obtained by searching based on the mode damper pulse spectrum and the desired outlet air temperature. The mode damper pulse spectrum contains the correspondence between the desired outlet air temperature and the target mode damper opening.

7. The vehicle air conditioning control method according to claim 1, characterized in that, Controlling the opening of the internal and external circulation dampers according to the desired outlet air temperature includes: The target circulation damper opening is obtained by searching based on the circulation damper pulse spectrum and the desired outlet air temperature. The circulation damper pulse spectrum contains the correspondence between the desired outlet air temperature and the target circulation damper opening.

8. A vehicle air conditioning control system, characterized in that, The system includes: The acquisition module is used to acquire multiple factors affecting air conditioning control; The first calculation module is used to determine the calibration variables of the air conditioning control influencing factors based on the air conditioning control influencing factors and the corresponding calibration curves of the air conditioning control influencing factors; the calibration curves are constructed from multiple calibration data points obtained from actual vehicle calibration, used to represent the correspondence between the air conditioning control influencing factors and the calibration variables, and the calibration data points are the corresponding calibration data points of the air conditioning control influencing factors and the calibration variables; the air conditioning control influencing factors include at least one of the following: user-set target temperature, in-vehicle temperature, outside vehicle temperature, and solar radiation intensity; the calibration variables of the air conditioning control influencing factors include at least one of the following: proportional gain of temperature difference, integral gain of temperature difference, outside vehicle temperature calibration variable, solar radiation intensity calibration variable, and target temperature calibration variable, wherein the temperature difference is the difference between the target temperature and the in-vehicle temperature; The second calculation module is used to calculate the feedforward term and the closed-loop control term using the air conditioning control influencing factors and the calibration curves corresponding to the air conditioning control influencing factors, and to calculate the desired outlet air temperature based on the feedforward term and the closed-loop control term. The desired outlet air temperature is: ； ； ； in, DVT This is the desired outlet air temperature value. DVTFf yes DVT feedforward term, DVTPi yes DVT Closed-loop control items, KSet The target temperature is the calibration variable, and TSet is the target temperature. Kam It is the outside temperature calibration variable. TAmb It's the outside temperature of the car. Ks It is the calibration variable for solar radiation intensity. Ts It is the intensity of solar radiation. KErr It is proportional gain. TCbn It's the temperature inside the car. Ki It is the integral gain.

9. A vehicle air conditioning control device, characterized in that, The vehicle air conditioning control equipment includes: One or more processors; A storage system for storing one or more programs, which, when executed by the one or more processors, cause the vehicle air conditioning control device to implement the vehicle air conditioning control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by the computer's processor, causes the computer to perform the vehicle air conditioning control method according to any one of claims 1 to 7.

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