A vehicle air conditioner refrigerant charge definition method, device, equipment and storage medium

Abstract

The application provides a vehicle air conditioner refrigerant charging quantity definition method, device, equipment and storage medium, belongs to the vehicle air conditioner refrigerant technical field, executes the charging quantity test process; the test process is executed, the refrigerant charging test bench is filled, the refrigerant charging quantity process data is recorded, and the relationship graph of air conditioner high pressure and refrigerant charging quantity is drawn with refrigerant charging quantity as X axis and air conditioner system high pressure as Y axis, the region where air conditioner system high pressure tends to be stable in the graph is found, the upper limit value and the lower limit value of refrigerant charging quantity are defined; the best refrigerant charging quantity is calculated; the medium pressure protection pressure and the medium pressure protection exit pressure are defined. The method of the application draws the relationship graph of air conditioner high pressure and refrigerant charging quantity, can accurately find the upper limit value and the lower limit value of refrigerant charging quantity. Compared with traditional experience judgment or rough estimation, it is more accurate, and can ensure that the performance of the refrigeration system reaches the optimum.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicle air conditioning refrigeration, and particularly relates to a vehicle air conditioning refrigerant charging quantity definition method, device, equipment and storage medium. BACKGROUND

[0002] The refrigerant charging quantity of a commercial vehicle air conditioning system determines a series of parameters of the air conditioning system, thereby affecting the driving comfort of a user and the reliability of the air conditioning system. The refrigerant charging quantity calibration of the air conditioning system is one of key factors determining the performance and reliability of the air conditioning system.

[0003] Traditional commercial vehicle air conditioning refrigerant charging quantity calibration needs to define and determine many parameters. Generally, a test personnel or user experience is used to judge or roughly estimate the range of each parameter, which causes inaccurate definition of the refrigerant charging quantity, causes distortion of the experience value of the refrigerant and the commercial vehicle air conditioning system, cannot guarantee stable operation of the vehicle air conditioning system, and cannot meet the refrigeration effect. SUMMARY

[0004] The application provides a vehicle air conditioning refrigerant charging quantity definition method. The method can meet the matching requirements between different refrigerants and air conditioners in multiple scenes, and guarantee stable operation of the vehicle air conditioning system.

[0005] The method comprises the following steps.

[0006] S101: performing a charging quantity test process, and configuring a target environment temperature threshold of air conditioning operation;

[0007] S102: checking the state of a test vehicle and the state of a sensor;

[0008] S103: performing the test process, charging a refrigerant on a test bench, recording refrigerant charging quantity process data, and drawing a high pressure of the air conditioning and the refrigerant charging quantity relationship graph with the refrigerant charging quantity as an X axis and the high pressure of the air conditioning system as a Y axis, finding a region where the high pressure of the air conditioning system tends to be stable in the high pressure of the air conditioning and the refrigerant charging quantity relationship graph, and defining an upper limit value and a lower limit value of the refrigerant charging quantity;

[0009] S104: in a state where the difference between the outlet air temperature at the lower limit of the refrigerant charging quantity and the target outlet air temperature is less than a preset temperature value, obtaining the best refrigerant charging quantity based on the sum of the lower limit M min of the refrigerant charging quantity, the upper limit M max of the refrigerant charging quantity, and an outlet air temperature compensation amount M h

[0010] S105: defining the medium pressure protection pressure and the medium pressure protection exit pressure according to the obtained best refrigerant charging quantity.

[0011] ​It is further needed to explain that step S103 further comprises: executing a test process, starting the engine, and keeping the engine speed at a preset idle speed;

[0012] Charging the refrigerant into the low-pressure pipeline of the air conditioning system with an initial charging amount M0;

[0013] Charging the refrigerant into the low-pressure pipeline of the air conditioning system with an initial charging amount M0; n Continuing to charge the refrigerant until the charging amount reaches an ending charging amount M1;

[0014] After each charging, obtaining the high-pressure value of the air conditioning system, and measuring the temperature of each air outlet of the air conditioning system using a temperature sensor;

[0015] Taking the refrigerant charging amount as the X-axis and the high-pressure value of the air conditioning system as the Y-axis, drawing a graph of the relationship between the high-pressure value of the air conditioning system and the refrigerant charging amount, and finding the region in the graph where the high-pressure value of the air conditioning system tends to be stable;

[0016] Based on the region where the high-pressure value tends to be stable, obtaining the lower limit M min of the refrigerant charging amount and the upper limit M max of the refrigerant charging amount.

[0017] It is further needed to explain that step S105 further comprises:

[0018] According to the condensing pressure in the test, adjusting the intermediate-pressure protection parameter in the air conditioning system:

[0019] Based on the actual working medium temperature T1 of the vehicle air conditioning system, obtaining the intermediate-pressure protection pressure P1;

[0020] Obtaining the difference ΔT1 between the phase change temperature of the working medium of the air conditioning condenser and the ambient temperature when the vehicle fan is not engaged;

[0021] Based on the maximum ambient temperature T h of the region where the vehicle is located and the difference ΔT1, obtaining the actual working medium temperature T1 of the vehicle air conditioning system.

[0022] It is further needed to explain that step S105 further comprises: based on the stable operation of the vehicle air conditioning system, obtaining the intermediate-pressure protection exit pressure P0 by summing the high-pressure value P n and the pressure fluctuation value P w ;

[0023] The high-pressure value P n is the high-pressure value corresponding to the optimal refrigerant charging amount when the vehicle air conditioning system operates at a preset target ambient temperature.

[0024] It is further needed to explain that in step S104, the optimal refrigerant charging amount M t is determined based on the following formula:

[0025] M t = 0.5×(Mmin +M max )+M h

[0026] wherein, M h is the air outlet temperature compensation amount.

[0027] It is further needed to be explained that the air outlet temperature compensation amount is adjusted according to the measured air outlet temperature in the test:

[0028] When the air outlet temperature T min of the lower limit of refrigerant charge amount is less than the preset temperature than the target air outlet temperature T t , M h =0.

[0029] When the air outlet temperature T min of the lower limit of refrigerant charge amount is greater than the preset temperature than the target air outlet temperature T t , and the air outlet temperature T max of the upper limit of refrigerant charge amount is less than the preset temperature than the target air outlet temperature T t , 0 h <0.5x(M max -M min ).

[0030] When the air outlet temperature T max of the upper limit of refrigerant charge amount is greater than the preset temperature than the target air outlet temperature T t , the air conditioning system is redesigned.

[0031] The application also provides a vehicle air conditioning refrigerant charge amount defining device, which comprises a test configuration module, an equipment detection module, a test bench, a parameter defining module, a charge amount calculation module and a pressure defining module.

[0032] The test configuration module is used to execute the charge amount test process and configure the target environment temperature threshold of the air conditioning operation.

[0033] The equipment detection module is used to detect the state of the test vehicle and the state of the sensor.

[0034] The parameter defining module is used to execute the test process, record the refrigerant charge amount process data by using the refrigerant charge amount test bench, draw the air conditioning high pressure and refrigerant charge amount relationship graph by taking the refrigerant charge amount as the X axis and the air conditioning system high pressure as the Y axis, find the region where the air conditioning system high pressure tends to be stable in the graph, and define the upper limit value and the lower limit value of the refrigerant charge amount.

[0035] The charge amount calculation module is used to, in the state where the air outlet temperature of the lower limit of refrigerant charge amount is less than the preset temperature value than the target air outlet temperature, calculate the refrigerant charge amount based on the lower limit of refrigerant charge amount M min, the upper limit of the refrigerant charge amount M max and the air outlet temperature compensation amount M h The sum of the lower limit of the refrigerant charge amount, the upper limit of the refrigerant charge amount, and the air outlet temperature compensation amount is the optimal refrigerant charge amount.

[0036] The pressure defining module is configured to define the medium-pressure protection pressure and the medium-pressure protection exit pressure based on the obtained optimal refrigerant charge amount.

[0037] Further, the application also provides a refrigerant charge amount monitoring server.

[0038] The refrigerant charge amount monitoring server is configured to set a refrigerant charge amount test process for the test vehicle, and a refrigerant charge amount definition rule corresponding to the refrigerant charge amount test process; obtain refrigerant charge amount process data generated based on the refrigerant charge amount test process from the test vehicle; and verify the refrigerant charge amount process data according to the refrigerant charge amount definition rule.

[0039] According to another embodiment of the application, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the vehicle air conditioner refrigerant charge amount definition method when executing the program.

[0040] According to another embodiment of the application, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the vehicle air conditioner refrigerant charge amount definition method when executing the program.

[0041] From the above technical solutions, the application has the following advantages:

[0042] The vehicle air conditioner refrigerant charge amount definition method provided by the application can ensure that the air conditioner system can maintain high operating efficiency under different working conditions by using the initial charge amount, the single charge amount, the end charge amount, the lower limit of the refrigerant charge amount, the upper limit of the refrigerant charge amount, and calculating the optimal charge amount based on these limits. In addition, the medium-pressure protection parameters of the air conditioner can be adjusted according to the condensing pressure in the test to improve the refrigeration effect and prolong the service life of the air conditioner system.

[0043] The application can ensure that the air outlet temperature provided by the air conditioner system is closer to the temperature expected by the user by comparing the lower limit of the refrigerant charge amount with the target air outlet temperature and adjusting the optimal charge amount accordingly, thereby improving the comfort of using the air conditioner.

[0044] The determination of the medium-pressure protection pressure and the medium-pressure protection exit pressure can prevent the air conditioner system from being damaged due to excessively high pressure. In addition, the air conditioner system can respond in time when encountering abnormal conditions to protect the system from damage and improve the safety and reliability of the system.

[0045] The application is directed to air conditioner control of commercial vehicles, and the embodiment considers the use environment difference of commercial vehicles in different regions and different seasons during test or use, sets the medium pressure protection pressure by calculating the actual working medium temperature of the commercial vehicle air conditioner, so that the air conditioner system can better adapt to various environmental conditions, and improve the adaptability and flexibility of the system. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0047] Figure 1 Flow chart for defining vehicle air conditioner refrigerant charge amount;

[0048] Figure 2 Schematic diagram of the relationship between air conditioner high pressure and refrigerant charge amount;

[0049] Figure 3 Flow chart for defining vehicle air conditioner refrigerant charge amount;

[0050] Figure 4 Schematic diagram of a vehicle air conditioner refrigerant charge amount defining device;

[0051] Figure 5 Schematic diagram of an electronic device. DETAILED DESCRIPTION

[0052] The following detailed description of the vehicle air conditioner refrigerant charge amount defining method steps is presented in terms of specific systems, techniques, and the like for the purpose of description and not limitation. Those skilled in the art will appreciate that the application can be practiced in other embodiments that depart from these specific details without sacrificing its essence.

[0053] It should be understood that when used in the present application, the term "comprising" indicates the presence of the described features, whole, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof. The terms "comprise", "include", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0054] It should be understood that "one or more" as referred to herein means one, two, or more, and "a plurality" as referred to herein means two or more. In the description of the application, unless otherwise stated, " / " means or, for example, A / B can mean A or B. "And / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone.

[0055] The phrase "one embodiment" or "some embodiments" as used in this application means that the particular feature, structure, or characteristic following the phrase is included in at least one embodiment of the application. Thus, the appearances of the phrase "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments", and the like, in various places in this application are not necessarily all referring to the same embodiment, unless otherwise specifically noted.

[0056] For the vehicle air conditioner refrigerant charge definition method described in this application, the optimal refrigerant charge can be accurately determined by obtaining refrigeration equipment parameters, considering environmental factors, performing tests and tests, etc.

[0057] Of course, the optimal charge of the commercial vehicle air conditioner refrigerant here is a value determined according to a plurality of parameters, which can also be a range, etc.

[0058] The plurality of parameters considered can involve rated refrigeration capacity, refrigerant type, ambient temperature, vehicle use conditions, etc.

[0059] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0060] Please refer to Figure 1 The flow chart of the vehicle air conditioner refrigerant charge definition method in a specific embodiment is shown, and the method comprises:

[0061] S101: Perform the charge test process, configure the target environment temperature threshold of the air conditioner operation.

[0062] In some embodiments, other related parameters can also be obtained before defining the vehicle air conditioner refrigerant charge. For example, rated refrigeration capacity, refrigerant type, ambient temperature, vehicle use conditions, and test environment.

[0063] The rated refrigerating capacity here is the rated refrigerating capacity of the air conditioning system of the commercial vehicle. The refrigerant type can adopt R32 refrigerant, and other types of refrigerant can also be adopted according to actual needs.

[0064] The ambient temperature can consider the influence of the ambient temperature on the refrigerant charge. For example, in a high-temperature environment, the evaporation speed of the refrigerant will be accelerated, and the charge can be appropriately increased to ensure the refrigeration effect.

[0065] S102: Detect the state of the test vehicle and the sensor state.

[0066] In some embodiments, during the test, the load, driving speed, external wind speed, etc. of the vehicle can be detected.

[0067] The embodiment can set corresponding sensors at the positions where data needs to be collected, and save the communication connection state of the sensor and the controller, so that the sensed data is transmitted to the controller in time for use.

[0068] For example, in a laboratory or actual use environment, a target ambient temperature threshold can also be set to simulate the use of the vehicle at different temperatures. The sensor can sense the ambient temperature and humidity, the refrigerant charge, the high-pressure pressure of the air conditioning system, the air outlet temperature, etc.

[0069] The data of the refrigerant charging process are recorded, including the refrigerant charge, the high-pressure pressure of the air conditioning system, the air outlet temperature, etc. By drawing a relationship diagram, the region where the high-pressure of the air conditioning system tends to be stable is found, and the upper limit value and the lower limit value of the refrigerant charge are defined.

[0070] In some embodiments, the sensors can be detected, and the test vehicle state can also be detected. The detection methods include the running states of the engine, the air conditioning system, and other related systems.

[0071] Confirm that all temperature sensors, pressure sensors, etc. related to the air conditioning system are in normal working state and can accurately feedback data.

[0072] In some specific embodiments, the completeness, no leakage, and normal work of the air conditioning system parts can also be detected. The air conditioning air duct has no air leakage, and the valve works normally. The switches for controlling the air conditioning work normally, and the warm air water valve opening and closing are normal; whether the air tightness of the test vehicle and the heat insulation parts around the engine compartment meet the design requirements of the whole vehicle; whether the engine, gearbox and fan states are normal, whether the corresponding control method can be realized; whether the front end air inlet condition of the test vehicle is consistent with the design requirements, etc.

[0073] S103: Execute the test process, charge the refrigerant into the test bench, record the refrigerant charging process data, and draw a relationship diagram between the air-conditioning high pressure and the refrigerant charging amount with the refrigerant charging amount as the X-axis and the air-conditioning system high pressure as the Y-axis. Find the area where the air-conditioning system high pressure tends to be stable in the relationship diagram between the air-conditioning high pressure and the refrigerant charging amount, and define the upper limit and lower limit of the refrigerant charging amount.

[0074] In some embodiments, a refrigerant charging device may be used to gradually charge the refrigerant into the air conditioning system of the test vehicle according to a preset step size. After each charging point, the high pressure value and temperature parameters of the air conditioning system are recorded.

[0075] like Figure 2 As shown, during the charging process, this embodiment generates refrigerant charge data and air conditioning system high-pressure data. Using data analysis software or a graphing tool, a relationship graph is plotted with the refrigerant charge as the X-axis and the air conditioning system high-pressure as the Y-axis. By analyzing the relationship graph, it is possible to identify areas where the air conditioning system high-pressure tends to be stable. The refrigerant charge corresponding to these areas is the upper and lower limits.

[0076] S104: When the difference between the outlet air temperature at the lower limit of the refrigerant charge amount and the target outlet air temperature is less than the preset temperature value, the refrigerant charge amount lower limit M is used to calculate the outlet air temperature. min , Refrigerant charge upper limit M max And the outlet temperature compensation M h The sum of the two values ​​is the optimal refrigerant charge.

[0077] In the embodiments of the present application, when the refrigerant charge reaches the lower limit, the air outlet temperature of the air conditioning system is measured. The air outlet temperature is compared with the target air outlet temperature. If the difference is less than a preset temperature value, the optimal refrigerant charge is calculated using an algorithm based on the lower and upper limits of the refrigerant charge and the air outlet temperature compensation.

[0078] S105: Based on the obtained optimal refrigerant charge amount, define a medium pressure protection pressure and a medium pressure protection exit pressure.

[0079] In some embodiments, a medium-pressure protection pressure is defined based on the optimal refrigerant charge and the performance of the air conditioning system. This protection pressure can be used to trigger a protection mechanism during air conditioning system operation when the system pressure exceeds a certain threshold, preventing system damage. A medium-pressure protection release pressure is also defined; when the system pressure drops to a certain level, the protection mechanism is automatically released, and the system resumes normal operation.

[0080] The method for defining the refrigerant charging quantity of the vehicle air conditioner of the embodiment relates to drawing a graph of the air conditioner high pressure and the refrigerant charging quantity, finding a region in which the air conditioner system high pressure tends to be stable, defining the upper limit value and the lower limit value of the refrigerant charging quantity, and obtaining the optimal refrigerant charging quantity based on the sum of the refrigerant charging quantity lower limit, the refrigerant charging quantity upper limit and the air outlet temperature compensation quantity in the state that the difference between the air outlet temperature at the refrigerant charging quantity lower limit point and the target air outlet temperature is less than a preset temperature value. Further, the medium pressure protection pressure and the medium pressure protection exit pressure can be defined. Thus, the upper limit value and the lower limit value of the refrigerant charging quantity can be accurately found. Compared with the traditional experience judgment or rough estimation, the method is more accurate and can ensure that the performance of the refrigeration system reaches the optimum. The optimal refrigerant charging quantity is obtained based on the comprehensive consideration of the refrigerant charging quantity lower limit, the refrigerant charging quantity upper limit and the air outlet temperature compensation quantity. The refrigeration effect of the air conditioner system can be ensured and the energy efficiency ratio of the system can be improved.

[0081] In one embodiment of the present application, based on steps S103 to S105, a possible embodiment will be described below to illustrate the specific implementation thereof.

[0082] In some specific embodiments, after the test starts, the engine is started and the rotating speed is kept at a predetermined idle rotating speed n±20 r / min.

[0083] In the embodiment, the refrigerant is filled into the low-pressure pipeline of the air conditioner system, the initial charging quantity is set as M0, and then the same single charging quantity M n The refrigerant is continuously filled until the charging quantity reaches the end charging quantity M1.

[0084] After each charging, the air conditioner system high pressure value is read by the built-in pressure sensor of the air conditioner, and the temperature of each air outlet of the air conditioner is measured by the temperature sensor.

[0085] In the embodiment, the refrigerant charging quantity is taken as the X axis, the air conditioner system high pressure is taken as the Y axis, a graph of the air conditioner high pressure and the refrigerant charging quantity is drawn, and a region in which the air conditioner system high pressure tends to be stable is found.

[0086] In some specific embodiments, the refrigerant charging quantity lower limit M min is the refrigerant charging quantity corresponding to the starting point of the air conditioner system high pressure stable region, and the refrigerant charging quantity upper limit M max is the refrigerant charging quantity corresponding to the ending point of the air conditioner system high pressure stable region.

[0087] After the optimal refrigerant charging quantity is determined in the embodiment, the air outlet temperature at the refrigerant charging quantity lower limit point is compared with the target air outlet temperature.

[0088] If the air outlet temperature Tmin and target air outlet temperature T t The difference is less than 1℃, that is, T min -T t <1℃, determine the optimal filling volume M t , the calculation formula is: M t =0.5×(M min +M max ).

[0089] In some embodiments, a medium pressure protection pressure and a medium pressure protection exit pressure are determined.

[0090] The air conditioner medium pressure protection parameters can be adjusted according to the condensing pressure in the test.

[0091] It should be noted that the vehicle controller can determine the start and stop of the air-conditioning compressor and the engagement and disengagement of the original vehicle cooling fan according to the control logic.

[0092] For example, when the fan of the test vehicle is not engaged, the difference between the phase change temperature of the air conditioner condenser and the ambient temperature is calculated. The actual working temperature of the commercial vehicle air conditioner is T1, which is the highest ambient temperature T in the area where the air conditioner user vehicle is located. h and ΔT1, that is, T1=T h +ΔT1.

[0093] In some embodiments, the medium pressure protection pressure P1 is the phase change pressure when the working fluid temperature of the commercial vehicle air conditioner is actually T1.

[0094] The medium pressure protection exit pressure P0 is the high pressure value P of the commercial vehicle air conditioning system in stable operation. n and pressure fluctuation value P w The sum of P0=P n +P w .

[0095] Here P n This is the high pressure value when the commercial vehicle air conditioner is operated at the optimal charge amount and the preset target ambient temperature.

[0096] In this embodiment, by using the initial charging amount, the single charging amount, the final charging amount, the lower limit M of the refrigerant charging amount min , Refrigerant charge upper limit M max Based on these limits, the optimal charge volume is calculated to ensure that the air conditioning system maintains high operating efficiency under different operating conditions. The medium-pressure protection parameters of the air conditioning system can also be adjusted based on the condensing pressure during the test, improving cooling performance and extending the service life of the air conditioning system.

[0097] The embodiment also compares the outlet air temperature at the lower limit of the refrigerant charge amount with the target outlet air temperature, and adjusts the optimal charge amount accordingly, so as to ensure that the outlet air temperature provided by the air conditioning system is closer to the temperature expected by the user, thereby improving the comfort of using the air conditioner.

[0098] The medium pressure protection pressure and the medium pressure protection exit pressure determined in the embodiment can prevent the air conditioning system from being damaged due to excessively high pressure. It can also ensure that the air conditioning system can respond in time when encountering abnormal conditions, protect the system from damage, and improve the safety and reliability of the system.

[0099] The embodiment mainly aims at the control of air conditioners for commercial vehicles. The embodiment takes into account the differences in use environment of commercial vehicles in different regions and different seasons when conducting tests or in use. The medium pressure protection pressure is set by calculating the actual working medium temperature of the air conditioner of the commercial vehicle, so that the air conditioning system can better adapt to various environmental conditions and improve the adaptability and flexibility of the system.

[0100] On the basis of the above-mentioned embodiments, in order to further improve the reliability of the vehicle air conditioner refrigerant charge amount defining method provided by the above-mentioned embodiments, in an embodiment, as shown in Figure 3 , the following specific steps can also be involved.

[0101] S201: Perform the charge amount test process, and configure the target environment temperature threshold of the air conditioner operation.

[0102] S202: Check the state of the test vehicle and the state of the sensor.

[0103] S203: Perform the test process, charge the refrigerant test bench, record the refrigerant charge amount process data, and plot the relationship between the air conditioner high pressure and the refrigerant charge amount with the refrigerant charge amount as the X axis and the air conditioner system high pressure as the Y axis, find the region in the graph where the air conditioner system high pressure tends to be stable, and define the upper limit value and the lower limit value of the refrigerant charge amount.

[0104] S204: If the difference between the outlet air temperature T min at the lower limit of the refrigerant charge amount and the target outlet air temperature T t is greater than 1℃, and the difference between the outlet air temperature T max at the upper limit of the refrigerant charge amount and the target outlet air temperature T t is less than 1℃.

[0105] That is, T max -T t <1℃<T min -T t , the optimal charge amount M t is determined.

[0106] The calculation formula of the embodiment is: M t= 0.5 x (M min + M max ) + M h , 0 < M h < 0.5 x (M max - M min ).

[0107] S205: defining the medium-pressure protection pressure and the medium-pressure protection exit pressure according to the obtained optimal refrigerant charge.

[0108] The embodiment obtains the optimal refrigerant charge based on the comprehensive consideration of the refrigerant charge lower limit, the refrigerant charge upper limit, and the air outlet temperature compensation amount. The refrigeration effect of the air conditioning system can be ensured, and the energy efficiency ratio of the system can be improved. The embodiment can determine the refrigerant charge range to avoid the possibility that too much refrigerant causes the system pressure to be too high, affecting the service life of the compressor, and too little refrigerant causes poor refrigeration effect. Therefore, a reasonable charge range can significantly improve the stability and reliability of the air conditioning system.

[0109] The following is an embodiment of a vehicle air conditioner refrigerant charge defining device provided by the embodiment of the present disclosure. The device and the vehicle air conditioner refrigerant charge defining method of each of the above embodiments belong to the same inventive concept. Details not described in the embodiment of the vehicle air conditioner refrigerant charge defining device can be referred to the embodiment of the vehicle air conditioner refrigerant charge defining method.

[0110] A mobile terminal implementing various embodiments of the present application will now be described with reference to the accompanying drawings. In the following description, the suffix "module" used for an element is merely intended for facilitating description and has no specific meaning and / or function. Therefore, "module" and "part" can be used interchangeably.

[0111] As shown in FIG. 11, the device includes a test configuration module, a device detection module, a test bench, a parameter definition module, a charge calculation module, and a pressure definition module. Figure 4 The test configuration module is configured to execute a charge test process and configure a target environment temperature threshold of the air conditioner.

[0112] The device detection module is configured to detect the state of the test vehicle and the state of the sensor.

[0113] The parameter definition module is configured to execute a test process, record refrigerant charge process data by using a refrigerant charge test bench, plot a graph of air conditioner high pressure and refrigerant charge by using refrigerant charge as the X-axis and air conditioner system high pressure as the Y-axis, find a region in the graph where the air conditioner system high pressure tends to be stable, and define the upper limit value and the lower limit value of the refrigerant charge.

[0114] The test configuration module is configured to execute a charge test process and configure a target environment temperature threshold of the air conditioner.

[0115] The filling amount calculation module is configured to calculate the optimal refrigerant filling amount based on the sum of the lower limit M of the refrigerant filling amount, the upper limit M of the refrigerant filling amount, and the air outlet temperature compensation amount M, in a state where the difference between the air outlet temperature at the lower limit of the refrigerant filling amount and the target air outlet temperature is less than a preset temperature value. min , the upper limit M of the refrigerant filling amount max , and the air outlet temperature compensation amount M h .

[0116] The pressure definition module is configured to define the medium-pressure protection pressure and the medium-pressure protection exit pressure according to the obtained optimal refrigerant filling amount.

[0117] Further, as a refinement and expansion of the above embodiment, in order to fully describe the specific implementation process in this embodiment, the vehicle air conditioner refrigerant filling amount definition device further comprises a filling amount monitoring server.

[0118] In some embodiments, the filling amount monitoring server configures a refrigerant filling amount test process of a test vehicle and a refrigerant filling amount definition rule corresponding to the refrigerant filling amount test process.

[0119] The filling amount monitoring server can distribute the configured refrigerant filling amount test process and the refrigerant filling amount definition rule corresponding to the refrigerant filling amount test process to corresponding modules, which refer to the test configuration module, the equipment detection module, the test bench, the parameter definition module, the filling amount calculation module, and the pressure definition module. In this way, the definition of the vehicle air conditioner refrigerant filling amount can be realized.

[0120] In this embodiment, it is ensured that the test vehicle and the sensor are in an operating state and have the ability to configure and monitor the refrigerant filling amount of the test vehicle. A new test project is created on the server for recording and managing the upcoming refrigerant filling amount test.

[0121] The starting and ending conditions of the test are defined, such as engine operation, air conditioner opening, etc., environmental temperature range, test duration, etc. Optionally, parameters such as refrigerant discharge, filling, system leak detection, performance verification, filling speed, target filling amount, etc. can be defined.

[0122] The refrigerant filling amount definition rule configured in this embodiment can determine the qualified range or standard value of the refrigerant filling amount according to the vehicle model, air conditioning system specifications, and industry standards. The specific standards for verifying the refrigerant filling amount process data are determined, such as data acquisition frequency, data accuracy requirements, and abnormal value judgment standards. The refrigerant filling amount definition rule is stored on the filling amount monitoring server in the form of program logic or configuration file for subsequent automatic verification and use.

[0123] In some embodiments, the refrigerant filling amount process data generated based on the refrigerant filling amount test process is obtained from the test vehicle.

[0124] In this embodiment, the test vehicle is connected to the filling quantity monitoring server via a wired or wireless method to ensure that data can be transmitted in real time.

[0125] After the test vehicle enters the preset test process, the data acquisition system is activated to begin recording process data related to the refrigerant charge, such as charge pressure, temperature, and real-time charge value. The collected data is transmitted to the charge monitoring server in real time or periodically to ensure data integrity and timeliness.

[0126] In some embodiments, the refrigerant charge process data is validated according to refrigerant charge definition rules.

[0127] In this embodiment, the received data can be cleaned and preprocessed to remove noise, outliers, etc. to ensure the accuracy and reliability of the data.

[0128] This embodiment also matches the pre-processed data with pre-configured refrigerant charge quantity definition rules to check whether the data meets the rule requirements.

[0129] If the data meets the rule requirements, it is marked as verified and performance evaluation or recording is performed.

[0130] If the data does not meet the requirements of the rules, it will be marked as verification failure and a corresponding error report or warning message will be generated to point out the problem, such as insufficient or excessive charging volume, data anomaly, etc.

[0131] In this embodiment, feedback can be provided to the test personnel or technicians based on the verification results to guide them to make corresponding adjustments or optimizations, such as refilling, adjusting test parameters, etc.

[0132] Based on the above approach, the present application can configure the refrigerant charge definition rules corresponding to the refrigerant charge test process while configuring the refrigerant charge test process for the test vehicle. Thus, after obtaining the refrigerant charge process data collected based on the refrigerant charge test process from the test vehicle, the refrigerant charge process data can be verified according to the refrigerant charge definition rules, thereby achieving dynamic verification of the collected refrigerant charge process data. Since the refrigerant charge definition rules are configured for the refrigerant charge test process, the refrigerant charge process data verified by the refrigerant charge definition rules can meet the refrigerant charge definition requirements. This allows for precise definition and dynamic verification of the vehicle air conditioner refrigerant charge, ensuring the accuracy and reliability of the test results.

[0133] This embodiment also provides an electronic device. Figure 5 A schematic diagram of the hardware structure of an electronic device for implementing various embodiments of the present invention.

[0134] The electronic device 500 includes, but is not limited to, a processor 501, a network module 502, an audio output unit 503, an input unit 504, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, and the like.

[0135] Those skilled in the art can understand that the electronic device structure involved in the embodiments of the present application does not constitute a limitation on the electronic device, and the electronic device can include more or fewer components than the illustration, or combine certain components, or different component arrangements. In the embodiments of the present application, the electronic device includes, but is not limited to, a laptop computer, a desktop computer, a workstation, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described and / or claimed herein.

[0136] In the embodiments of the present application, the processor 501 can be implemented by using at least one of a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, such implementation can be implemented in a controller. For software implementation, the implementation of such processes or functions can be implemented with a separate software module allowing at least one function or operation to be performed. The software code can be implemented by a software application (or program) written in any appropriate programming language, which can be stored in a memory and executed by a controller.

[0137] The processor 501 provides the user with wireless Internet access through the network module 502, and realizes the transmission and communication of data information in the present application.

[0138] The audio output unit 503 can provide audio output related to a specific function performed by the processor 501. The audio output unit 503 includes a speaker, a buzzer, a receiver, and the like.

[0139] The input unit 504 is configured to receive audio or video signals. The display unit 506 includes a display panel, which can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0140] The user input unit 507 can include, but is not limited to, a physical keyboard, function keys (such as volume control buttons, on-off buttons, etc.), trackballs, mice, joysticks, and the like, which will not be described here.

[0141] The memory 509 includes a high-speed random access memory, and can further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device.

[0142] In addition, the electronic device 500 includes some functional modules that are not shown here and will not be described here.

[0143] The electronic device disclosed in the present application is a unit and algorithm step of each example described in combination with the embodiments of the vehicle air conditioner refrigerant charge definition method disclosed herein, which can be realized by electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been described generally in the above description. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0144] In the present application, the storage medium stores the steps of the vehicle air conditioner refrigerant charge definition method.

[0145] Specifically, the method can include:

[0146] Performing a charging test process, configuring a target ambient temperature threshold of the air conditioner operation.

[0147] Checking the state of the test vehicle and the sensor state.

[0148] Performing a test process, charging the refrigerant test bench, recording the refrigerant charging process data, and drawing a graph of the relationship between the air conditioner high pressure and the refrigerant charge with the refrigerant charge as the X-axis and the air conditioner system high pressure as the Y-axis, finding the region in the graph where the air conditioner system high pressure tends to be stable, and defining the upper and lower limit values of the refrigerant charge.

[0149] In the state that the difference between the outlet air temperature and the target outlet air temperature at the lower limit of the refrigerant charge is less than the preset temperature value, based on the lower limit M of the refrigerant chargemin , refrigerant charge upper limit M max and air outlet temperature compensation amount M h The sum of the refrigerant charge lower limit M, the refrigerant charge upper limit M and the air outlet temperature compensation amount M obtains the optimal refrigerant charge.

[0150] According to the obtained optimal refrigerant charge, the medium pressure protection pressure and the medium pressure protection exit pressure are defined.

[0151] Further, the performance of the refrigeration system can be ensured to be optimal. The optimal refrigerant charge is obtained based on the comprehensive consideration of the refrigerant charge lower limit, the refrigerant charge upper limit and the air outlet temperature compensation amount in the embodiment. The refrigeration effect of the air conditioning system can be ensured, and the energy efficiency ratio of the system can be improved.

[0152] The storage medium can employ any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium, for example, can be, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include an electrical connection having one or more wires, a portable disc, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0153] The above description of disclosed embodiments enables a person skilled in the art to implement or use the invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of defining a refrigerant charge for a vehicle air conditioner, characterized by, The method comprises: S101: performing a charging amount test process, and configuring a target environment temperature threshold of air conditioner operation; S102: detecting a state of a test vehicle and a sensor state; S103: performing a test process, charging a refrigerant to a test bench, recording refrigerant charging amount process data, and drawing an air conditioner high pressure and refrigerant charging amount relationship graph with refrigerant charging amount as an X axis and air conditioner system high pressure as a Y axis, finding an air conditioner system high pressure stable region in the air conditioner high pressure and refrigerant charging amount relationship graph, and defining an upper limit value and a lower limit value of the refrigerant charging amount; S104: In a state where the difference between the outlet air temperature at the lower limit of the refrigerant charge amount and the target outlet air temperature is less than a predetermined temperature value, the refrigerant optimal charge amount is obtained based on the sum of the lower limit M min of the refrigerant charge amount, the upper limit M max of the refrigerant charge amount, and the outlet air temperature compensation amount M h ​ S105: defining a medium pressure protection pressure and a medium pressure protection exit pressure according to the obtained refrigerant optimal charging amount.

2. The vehicle air conditioner refrigerant charging amount defining method according to claim 1, wherein Step S103 further comprises: performing a test process, starting an engine, and keeping an engine speed at a preset idle speed; charging refrigerant to a low pressure pipeline of the air conditioner system at an initial charging amount M0; With a single charge amount M n The charging of refrigerant is continued until the charge amount reaches the end charge amount M1. after each charging, acquiring air conditioner system high pressure values, and using a temperature sensor to measure air conditioner outlet temperatures; drawing an air conditioner high pressure and refrigerant charging amount relationship graph with refrigerant charging amount as an X axis and air conditioner system high pressure as a Y axis, and finding an air conditioner system high pressure stable region in the graph; Based on the region where the high pressure tends to be stabilized, a lower limit M of the refrigerant charge amount is obtained min and an upper limit M of the refrigerant charge amount max .

3. The vehicle air conditioner refrigerant charging amount defining method according to claim 1, wherein Step S105 further comprises: adjusting air conditioner medium pressure protection parameters according to a test condensing pressure: obtaining a medium pressure protection pressure P1 based on a vehicle air conditioner actual use working medium temperature T1; acquiring a difference ΔT1 between an air conditioner condenser working medium phase change temperature and an environment temperature when a vehicle fan is not engaged; Based on the highest ambient temperature T of the area where the vehicle is located h The sum of ΔT1 and T1 is the actual working medium temperature T1 used by the vehicle air conditioner.

4. The vehicle air conditioner refrigerant charging amount defining method according to claim 1, wherein Step S105 further comprises: based on the high-pressure pressure value P n and the pressure fluctuation value P w , the sum of which obtains the medium-pressure protection exit pressure P0; High pressure value P n The high pressure value corresponding to the optimal refrigerant charge amount when operating at the preset target ambient temperature.

5. The vehicle air conditioner refrigerant charging amount defining method according to claim 1, wherein In step S104, the optimal refrigerant charge amount M is determined based on the following equation t , M t = 0.5 x (M min + M max ) + M h Wherein, M h is the air outlet temperature compensation amount.

6. The vehicle air conditioner refrigerant charging amount defining method according to claim 5, wherein adjusting an outlet air temperature compensation amount according to a test measured outlet air temperature: When the outlet air temperature T min and target air outlet temperature T t When the difference is less than the preset temperature, M h =0; When the refrigerant charge lower limit point air outlet temperature T min is greater than the target air outlet temperature T t by more than a preset temperature, and the refrigerant charge upper limit point air outlet temperature T max is less than the target air outlet temperature T t by less than a preset temperature, 0 < M h < 0.5 x (M max - M min ); When the refrigerant charge upper limit point outflow temperature T max is greater than the target outflow temperature T t by a preset temperature, the air conditioning system is redesigned.

7. A vehicle air conditioning refrigerant charge defining device characterized by, The system is used to implement the vehicle air conditioner refrigerant charging amount defining method according to any one of claims 1 to 6; The device comprises: a test configuration module, a device detection module, a test bench, a parameter defining module, a charging amount calculation module, and a pressure defining module; The test configuration module is used to perform a charging amount test process, and configure a target environment temperature threshold of air conditioner operation; The device detection module is used to detect a state of a test vehicle and a sensor state; The parameter defining module is used to perform a test process, charge a refrigerant to a test bench, record refrigerant charging amount process data, draw an air conditioner high pressure and refrigerant charging amount relationship graph with refrigerant charging amount as an X axis and air conditioner system high pressure as a Y axis, find an air conditioner system high pressure stable region in the graph, and define an upper limit value and a lower limit value of the refrigerant charging amount; The charge amount calculation module is configured to calculate the optimal refrigerant charge amount based on the sum of the lower limit M of the refrigerant charge amount, the upper limit M of the refrigerant charge amount, and the air outlet temperature compensation amount M, in a state where the difference between the air outlet temperature at the lower limit of the refrigerant charge amount and the target air outlet temperature is less than a preset temperature value. min , the upper limit M of the refrigerant charge amount max , and the air outlet temperature compensation amount M h . The pressure defining module is used to define a medium pressure protection pressure and a medium pressure protection exit pressure according to the obtained refrigerant optimal charging amount.

8. The vehicle air conditioner refrigerant charging amount defining device according to claim 7, wherein further comprising: A charge monitoring server; The charge monitoring server configures a refrigerant charge test process of a test vehicle and a refrigerant charge definition rule corresponding to the refrigerant charge test process; obtains refrigerant charge process data generated based on the refrigerant charge test process from the test vehicle; and verifies the refrigerant charge process data according to the refrigerant charge definition rule.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the steps of the vehicle air conditioner refrigerant charge definition method according to any one of claims 1 to 6 when executing the program.

10. A storage medium having stored thereon a computer program, characterized in that The computer program implements the steps of the vehicle air conditioner refrigerant charge definition method according to any one of claims 1 to 6 when executed by the processor.

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