A new energy vehicle air conditioning test method and system

Abstract

The present application provides a new energy vehicle air conditioner testing method and system. First, the rotation speed of the compressor is adjusted to make the first exhaust flow rate consistent with the second exhaust flow rate. The low-temperature influence of the new energy vehicle air conditioner is calculated by recording the change value of the compressor rotation speed and the gas temperature difference value of the intermediate test gas. The intermediate test gas of different temperatures is added for compression testing to obtain the low-temperature influences corresponding to the different temperatures. The low-temperature influences corresponding to the different temperatures are correlated and scored by the air conditioner test rotation speed to determine the low-temperature influence scoring trajectory of the new energy vehicle air conditioner. The low-temperature working test interval of the new energy vehicle air conditioner is determined according to the score distribution characteristics of the low-temperature influence score in the low-temperature influence scoring trajectory. The present application can test the air conditioner according to the degree of influence of low temperature on the performance of the air conditioner, thereby improving the stability of the operation of the new energy vehicle air conditioner in a low-temperature environment.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air-conditioning testing, and more specifically, to a new energy automobile air-conditioning testing method and system. Background Art

[0002] The basic principles of the air-conditioning system of new energy vehicles are similar to those of traditional fuel vehicles. The main differences are reflected in the driving method of the air-conditioning compressor and the source of warm air. New energy vehicles usually use electric compressors for cooling, which are powered by power batteries. In terms of warm air, electric vehicles mainly rely on electric heating methods, including heating coolant and directly heating the air.

[0003] New energy vehicles often need to turn on dehumidifying air conditioners when driving in winter to avoid fogging of the glass windows that affects the driver's driving. The air conditioner's compressor refrigeration function will simultaneously remove moisture from the air to make the air inside the car dry, thereby preventing water vapor from condensing into fog on the cold glass. However, when the temperature is low, the evaporation pressure of the refrigerant decreases and the evaporation temperature is lower, resulting in a decrease in the efficiency of the refrigeration cycle. In addition, the lubricating oil of the compressor becomes more viscous and the resistance increases at low temperatures, which greatly affects the operating performance of the air conditioner. Therefore, how to test the air conditioner for the impact of low temperatures on the performance of new energy vehicles before leaving the factory, so as to avoid excessive degradation of the air conditioner performance of new energy vehicles when the air conditioner dehumidification is turned on in a low temperature environment, has become an urgent problem to be solved. Summary of the invention

[0004] The present application provides a new energy vehicle air-conditioning testing method and system, which can test the air-conditioning according to the degree of influence of low temperature on the performance of the air-conditioning, thereby improving the stability of the operation of the new energy vehicle air-conditioning in a low temperature environment.

[0005] In a first aspect, the present application provides a method for testing air conditioners of new energy vehicles. The method can be executed by a network device, or can also be executed by a chip configured in the network device, and the present application does not limit this.

[0006] Specifically, the method includes:

[0007] Inputting an oil-gas mixture into the air conditioner of the new energy vehicle for compression testing, and collecting a first exhaust flow rate of the compressor in the air conditioner of the new energy vehicle;

[0008] After the first exhaust flow rate of the new energy vehicle air conditioner is higher than a preset threshold, the intermediate test gas is added to the new energy vehicle air conditioner and a compression test is performed again to collect the second exhaust flow rate of the compressor in the new energy vehicle air conditioner;

[0009] By adjusting the speed of the compressor, the second exhaust flow rate is made consistent with the first exhaust flow rate, and by recording the change value of the compressor speed and the gas temperature difference value of the intermediate test gas, the low temperature influence degree of the new energy vehicle air conditioner is calculated;

[0010] Supplementing intermediate test gas at different temperatures to perform compression testing, obtain low-temperature influence degrees at different temperatures, and perform correlation weighted fusion according to the low-temperature influence degrees at different temperatures to obtain the low-temperature influence curve of the new energy vehicle air conditioner;

[0011] The influence characteristics of the low-temperature influence curve are extracted to obtain the low-temperature working test range of the new energy vehicle air conditioner.

[0012] In combination with the first aspect, in certain implementations of the first aspect, an air flow channel is provided in front of the compressor suction port, and a spray port is provided on the air flow channel.

[0013] In combination with the first aspect, in certain implementations of the first aspect, an electric scroll compressor is used as the compressor in the new energy vehicle air conditioner.

[0014] In combination with the first aspect, in certain implementations of the first aspect, a flow meter at the exhaust port of the compressor in the air conditioner of the new energy vehicle is used to collect the first exhaust flow rate.

[0015] In combination with the first aspect, in certain implementations of the first aspect, an air supply hole is provided on the static scroll disk of the compressor in the air conditioner of the new energy vehicle, and the intermediate test gas is injected into the compression chamber of the compressor through the air supply hole to mix with the original compressed gas.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the low temperature impacts corresponding to different temperatures are scored by correlation using the air conditioner test speed, and determining the low temperature impact score trajectory of the new energy vehicle air conditioner specifically includes:

[0017] Obtain the low temperature impact and air conditioning test speed corresponding to different temperatures;

[0018] For any low temperature influence degree, determine the relative influence coefficient between the low temperature influence degree and other low temperature influence degrees;

[0019] For any low temperature influence degree, determine the correlation influence coefficient between the low temperature influence degree and the air conditioner test speed;

[0020] According to the relevant influence coefficients and relative influence coefficients corresponding to the low-temperature influence degrees at different temperatures, the low-temperature influence scores corresponding to different temperature points are determined, and the low-temperature influence scores corresponding to different temperature points are fitted to obtain the low-temperature influence score trajectory of the new energy vehicle air conditioner.

[0021] In combination with the first aspect, in certain implementations of the first aspect, determining the low temperature working test interval of the new energy vehicle air conditioner according to the score distribution characteristics of the low temperature impact score in the low temperature impact score trajectory specifically includes:

[0022] Get the preset standard threshold score;

[0023] Perform feature extraction on the low temperature impact scoring trajectory according to the standard threshold score to obtain a feature scoring node of the low temperature impact scoring trajectory, and use the temperature value corresponding to the feature scoring node as the lower limit of the low temperature working test interval of the new energy vehicle air conditioner;

[0024] The rated operating temperature upper limit of the new energy vehicle air conditioner is obtained as the temperature upper limit of the low-temperature working test interval of the new energy vehicle air conditioner.

[0025] In a second aspect, the present application provides a new energy vehicle air conditioning test system, including an air conditioning test unit, the air conditioning test unit including:

[0026] An air conditioning exhaust test module, used for inputting an oil-gas mixture into the air conditioning of a new energy vehicle for compression testing, and testing to obtain a first exhaust flow rate of a compressor in the air conditioning of the new energy vehicle;

[0027] The air conditioning exhaust test module is further used to supplement the intermediate test gas to the new energy vehicle air conditioning and perform a compression test again after the first exhaust flow rate of the new energy vehicle air conditioning is higher than a preset threshold, so as to obtain a second exhaust flow rate of the compressor in the new energy vehicle air conditioning;

[0028] A test result processing module, used to adjust the speed of the compressor so that the second exhaust flow rate is consistent with the first exhaust flow rate, and calculate the low temperature influence of the new energy vehicle air conditioner by recording the change value of the compressor speed and the gas temperature difference value of the intermediate test gas;

[0029] The test result processing module is used to supplement the intermediate test gas of different temperatures for compression testing, obtain the low temperature influence degrees corresponding to the different temperatures, and perform correlation scores on the low temperature influence degrees corresponding to the different temperatures according to the air conditioner test speed, so as to determine the low temperature influence score trajectory of the new energy vehicle air conditioner;

[0030] The test result processing module is also used to determine the low-temperature working test range of the new energy vehicle air conditioner according to the score distribution characteristics of the low-temperature impact score in the low-temperature impact score trajectory.

[0031] In a third aspect, the present application provides a computer terminal device, which includes a memory and a processor, wherein the memory stores a code, and the processor is configured to obtain the code and execute the above-mentioned new energy vehicle air conditioning test method.

[0032] In a fourth aspect, the present application provides a computer-readable storage medium, which stores at least one computer program, and the computer program is loaded and executed by a processor to implement the operations performed by the above-mentioned new energy vehicle air conditioning testing method.

[0033] The technical solution provided by the embodiments disclosed in this application has the following beneficial effects:

[0034] In a new energy vehicle air conditioner testing method and system provided by the present application, firstly, an oil-gas mixture is input into the new energy vehicle air conditioner for compression testing, and a first exhaust flow rate of the compressor in the new energy vehicle air conditioner is obtained by testing; then, an intermediate test gas is added to the new energy vehicle air conditioner and a compression test is performed again, and a second exhaust flow rate of the compressor in the new energy vehicle air conditioner is obtained by testing; the speed of the compressor is adjusted so that the second exhaust flow rate is consistent with the first exhaust flow rate, and the low temperature influence degree of the new energy vehicle air conditioner is calculated by recording the change value of the compressor speed and the gas temperature difference value of the intermediate test gas; intermediate test gases of different temperatures are added for compression testing to obtain the low temperature influence degrees corresponding to different temperatures, and the low temperature influence degrees corresponding to different temperatures are correlated and scored by the air conditioner test speed to determine the low temperature influence scoring trajectory of the new energy vehicle air conditioner; the low temperature working test interval of the new energy vehicle air conditioner is determined according to the score distribution characteristics of the low temperature influence score in the low temperature influence scoring trajectory;

[0035] It can be seen that the present application simulates the actual working conditions of the air conditioner in a low temperature environment by using test gases at different temperatures. Each compression test can record the changes in the exhaust flow rate of the air conditioner compressor at different temperatures, thereby obtaining the working characteristics of the air conditioner in a low temperature environment; and by adjusting the speed of the compressor, the second exhaust flow rate at different temperatures is consistent with the first exhaust flow rate, which can ensure that the temperature change of the test gas is the only influencing factor, exclude other interference variables, and accurately evaluate the specific impact of temperature on the performance of the compressor. The low temperature impact scoring trajectory is obtained by scoring the correlation of the low temperature impact degree at different temperatures, which improves the credibility of the test data. The working performance of the new energy vehicle air conditioner in different low temperature environments is examined through the low temperature impact scoring trajectory, which can help judge the stability and reliability of the air conditioning system under extreme low temperature conditions. Finally, the distribution characteristics in the scoring trajectory provide a basis for judging the working range of the air conditioning system, and the low temperature working test range of the air conditioner is obtained by testing. The low temperature working test range is the safe working temperature range with a low degree of influence of the low temperature environment obtained after the new energy vehicle air conditioner is tested. In summary, the present application can test the air conditioner according to the degree of influence of low temperature on the performance of the air conditioner, and obtain the safe working range of the new energy vehicle air conditioner with a low degree of influence by low temperature, thereby improving the stability of the operation of the new energy vehicle air conditioner in a low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is an exemplary flow chart of a new energy vehicle air conditioning test method according to some embodiments of the present application;

[0037] Figure 2 is an exemplary flow chart for determining a low temperature working test interval in some embodiments of the present application;

[0038] Figure 3 is a schematic diagram of exemplary hardware and / or software of an air conditioning test unit according to some embodiments of the present application;

[0039] Figure 4 It is a structural schematic diagram of a computer terminal device for implementing a new energy vehicle air conditioning test method according to some embodiments of the present application. DETAILED DESCRIPTION

[0040] The present application performs a compression test by inputting an oil-gas mixture into the air conditioner of a new energy vehicle, and obtains a first exhaust flow rate of the compressor in the air conditioner of the new energy vehicle through the test; then, an intermediate test gas is added to the air conditioner of the new energy vehicle and a compression test is performed again, and a second exhaust flow rate of the compressor in the air conditioner of the new energy vehicle is obtained through the test; the speed of the compressor is adjusted so that the second exhaust flow rate is consistent with the first exhaust flow rate, and the low-temperature influence degree of the air conditioner of the new energy vehicle is calculated by recording the change value of the compressor speed and the gas temperature difference value of the intermediate test gas; intermediate test gases of different temperatures are added to perform compression tests, and the low-temperature influence degrees corresponding to different temperatures are obtained, and the low-temperature influence degrees corresponding to different temperatures are correlated and scored according to the air conditioner test speed, and the low-temperature influence scoring trajectory of the air conditioner of the new energy vehicle is determined; the low-temperature working test interval of the air conditioner of the new energy vehicle is determined according to the score distribution characteristics of the low-temperature influence score in the low-temperature influence scoring trajectory. The present application can test the air conditioner according to the degree of influence of low temperature on the performance of the air conditioner, and improves the stability of the operation of the air conditioner of the new energy vehicle in a low-temperature environment.

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figure 1 , which is an exemplary flow chart of a new energy vehicle air conditioner testing method according to some embodiments of the present application. The new energy vehicle air conditioner testing method 100 mainly includes the following steps:

[0042] In step S101, an oil-gas mixture is input into an air conditioner of a new energy vehicle for compression testing, and a first exhaust flow rate of a compressor in the air conditioner of the new energy vehicle is obtained by the test.

[0043] It should be noted that using an oil-gas mixture as the compression medium of the compressor can form an oil film on the meshing surfaces of the moving and stationary scrolls in the compressor pump body. The oil-gas mixture is a gaseous oil-gas mixture formed by compressed air and refrigerant oil molecules. Optionally, in some embodiments, the gaseous oil-gas mixture is input into the new energy vehicle air conditioner through the compressor intake port.

[0044] Optionally, in some embodiments, an air flow channel is provided in front of the compressor suction port, and a spray port is provided on the air flow channel, and the refrigerant oil is sprayed into the air flow channel in a mist form through the spray port.

[0045] Preferably, in some embodiments, an electric scroll compressor is used as the compressor in the air conditioner of the new energy vehicle. It should be noted that the electric scroll compressor is a volumetric compression compressor, and the compression component is composed of a movable scroll and a stationary scroll. Due to the shortcomings of the new energy vehicle using a single heat pump system, it is necessary to open a small hole on the stationary scroll of the scroll compressor so that the refrigerant at an intermediate temperature and an intermediate pressure can be injected into the compression chamber and mixed with the original refrigerant after the first-stage compression and further compressed to improve the performance of the heat pump system and avoid the compressor from overheating and shutting down. However, when the temperature of the supplementary refrigerant is too low, the evaporation effect of the refrigerant will deteriorate, making it necessary to increase the compressor speed to balance the exhaust flow of the air conditioner.

[0046] Optionally, in some embodiments, after the oil-gas mixture is input into the new energy vehicle air conditioner and a fixed test time has passed, the first exhaust flow rate is collected using a flow meter at the exhaust port of the compressor in the new energy vehicle air conditioner.

[0047] In step S102, after the first exhaust flow rate of the new energy vehicle air conditioner is higher than a preset threshold, the intermediate test gas is added to the new energy vehicle air conditioner and a compression test is performed again to obtain a second exhaust flow rate of the compressor in the new energy vehicle air conditioner.

[0048] It should be noted that when the first exhaust flow rate of the new energy vehicle air conditioner is higher than the preset threshold value, it indicates that a stable oil film has been formed on the meshing surface of the moving and stationary scrolls in the compressor pump body, and the elementary volume of the compressor in the new energy vehicle air conditioner is basically fixed, which increases the accuracy of the test results. In specific implementation, the preset threshold value can be based on multiple tests, and the average value of the exhaust flow rate values ​​when the oil film is formed in multiple tests is used as the preset threshold value.

[0049] Preferably, in some embodiments, an air supply hole is provided on the static scroll disk of the compressor in the air conditioner of the new energy vehicle, and the intermediate test gas is injected into the compression chamber of the compressor through the air supply hole to mix with the original compressed gas.

[0050] Optionally, in some embodiments, the gas temperature of the intermediate test gas is lower than the temperature of the oil-gas mixture, and nitrogen or other inert gases can be used as the intermediate test gas. In specific implementation, the intermediate test gas is supplemented to the new energy vehicle air conditioner and after a fixed test time, the second exhaust flow is collected by using a flow meter at the exhaust port of the compressor in the new energy vehicle air conditioner.

[0051] In step S103, the second exhaust flow is made consistent with the first exhaust flow by adjusting the speed of the compressor, and the low temperature impact of the new energy vehicle air conditioner is calculated by recording the change value of the compressor speed and the gas temperature difference of the intermediate test gas.

[0052] It should be noted that the electric scroll compressor is a volumetric compression compressor, and the compression component is composed of a movable scroll and a static scroll. Due to the shortcomings of new energy vehicles using a single heat pump system, it is necessary to open a small hole on the static scroll of the scroll compressor so that the refrigerant at intermediate temperature and intermediate pressure can be injected into the compression chamber and mixed with the original refrigerant after the first-stage compression and further compressed to improve the performance of the heat pump system and avoid compressor overheating and shutdown. However, when the temperature of the supplementary refrigerant is too low, the evaporation effect of the refrigerant will deteriorate, making it necessary to increase the compressor speed to balance the exhaust flow of the air conditioner. In this application, a low-temperature intermediate test gas is used to simulate the compressor operating conditions when the ambient temperature is low, so as to test the impact of low-temperature conditions on the air conditioners of new energy vehicles and improve the stability and safety of the air conditioners of new energy vehicles during operation.

[0053] Optionally, in some embodiments, the compressor speed change value is a difference between the initial compressor speed and the compressor speed when the first exhaust flow rate is consistent with the second exhaust flow rate.

[0054] It should be noted that the low temperature impact degree described in the present application represents the degree of influence of the low temperature environment on the working performance of the air conditioner. Optionally, in some embodiments, the low temperature impact degree is determined by the ratio between the compressor speed change value and the gas temperature difference value of the intermediate test gas.

[0055] In step S104, intermediate test gas of different temperatures is added to perform compression testing to obtain low-temperature impacts corresponding to different temperatures, and correlation scores are performed on the low-temperature impacts corresponding to different temperatures according to the air-conditioning test speed to determine the low-temperature impact score trajectory of the new energy vehicle air-conditioning.

[0056] It should be noted that the air-conditioning test speed is the speed of the air-conditioning compressor of the new energy vehicle before the compression test is performed by supplementing the intermediate test gas at different temperatures. Before the compression test is performed by supplementing the intermediate test gas at different temperatures, in order to avoid the interference of the previous low-temperature test with the subsequent low-temperature influence, it is necessary to perform a correlation score on the low-temperature influence degrees corresponding to different temperatures according to the air-conditioning test speeds corresponding to different temperatures, and perform a credibility score based on the correlation between the data, thereby reducing the interference of the previous low-temperature test and increasing the accuracy of the air-conditioning low-temperature influence test.

[0057] This application further calculates the credibility score of the test data based on the correlation between the test rotation speed and the low-temperature influence under different temperature conditions; by weighted scoring these data, the interfered data can be filtered out, and the test results with high correlation and strong credibility are focused on, thereby reducing the temperature interference caused by the low-temperature test of the previous intermediate test gas, and improving the accuracy and reliability of the overall test.

[0058] Preferably, in some embodiments, the low temperature impact corresponding to different temperatures is scored by the air conditioner test speed, and the low temperature impact score trajectory of the new energy vehicle air conditioner can be determined by the following steps:

[0059] Obtain the low temperature impact and air conditioning test speed corresponding to different temperatures;

[0060] For any low temperature influence degree, determine the relative influence coefficient between the low temperature influence degree and other low temperature influence degrees;

[0061] For any low temperature influence degree, determine the correlation influence coefficient between the low temperature influence degree and the air conditioner test speed;

[0062] According to the relevant influence coefficients and relative influence coefficients corresponding to the low-temperature influence degrees at different temperatures, the low-temperature influence scores corresponding to different temperature points are determined, and the low-temperature influence scores corresponding to different temperature points are fitted to obtain the low-temperature influence score trajectory of the new energy vehicle air conditioner.

[0063] It should be noted that the relative influence coefficient described in the present application reflects the correlation degree between the characteristic change amount of the low temperature influence degree and other low temperature influence degrees. In specific implementation, for any low temperature influence degree, determining the relative influence coefficient of the low temperature influence degree relative to other low temperature influence degrees can be achieved by the following steps:

[0064] Obtain the corresponding low temperature impact degree and air conditioning test speed at different temperatures;

[0065] Determine the Pearson correlation coefficient between the low temperature effect and the air conditioning test speed at different temperatures;

[0066] For any low temperature influence degree, determine the relative influence coefficient of the low temperature influence degree relative to other low temperature influence degrees according to the Pearson correlation coefficient;

[0067] The relative influence coefficient corresponding to the low temperature influence degree = the average change ratio of the low temperature influence degree relative to the adjacent low temperature influence degree / the Pearson correlation coefficient between the low temperature influence degree and the air conditioner test speed.

[0068] It should be noted that the correlation influence coefficient described in the present application reflects the correlation degree between the characteristic change of the low temperature influence degree and the characteristic change of the air conditioner test speed. Optionally, in some embodiments, for any low temperature influence degree, determining the correlation influence coefficient between the low temperature influence degree and the air conditioner test speed can be achieved by adopting the following steps:

[0069] Determine the Pearson correlation coefficient between the low temperature effect and the air conditioning test speed at different temperatures;

[0070] For any low temperature influence degree, determine the relative influence coefficient of the low temperature influence degree with respect to other low temperature influence degrees according to the Pearson correlation coefficient, and obtain the temperature value corresponding to the low temperature influence degree as the relevant temperature value;

[0071] Normalize the air-conditioning test speeds corresponding to different temperatures to obtain a normalized sequence of air-conditioning test speeds;

[0072] The intrinsic mode function of the normalized sequence of the air conditioner test speed is extracted, and the relevant influence coefficient between the low temperature influence degree and the air conditioner test speed is determined according to the relevant temperature value, the intrinsic mode function and the relative influence coefficient.

[0073] In specific implementation, the air-conditioning test speed normalized sequence can be fitted and then empirical mode decomposition can be used to obtain the intrinsic mode function of the air-conditioning test speed normalized sequence, and the correlation influence coefficient between the low temperature influence and the air-conditioning test speed = |the relative influence coefficient × the Pearson correlation coefficient between the low temperature influence and the air-conditioning test speed - the first-order derivative value of the intrinsic mode function corresponding to the relevant temperature value|.

[0074] It should be noted that the relevant influence coefficients and relative influence coefficients corresponding to the low temperature influence degrees at different temperatures are obtained according to the correlation degree of the test data distribution, which can reflect the credibility of the data to a certain extent. Therefore, the low temperature influence scores corresponding to different temperature points can be determined according to the relevant influence coefficients and relative influence coefficients corresponding to the low temperature influence degrees at different temperatures, thereby reducing the interference of erroneous test data and improving the accuracy of the final air-conditioning test results. Preferably, in some embodiments, the weight coefficient of the low temperature influence degree can be determined according to the relevant influence coefficients and relative influence coefficients corresponding to the low temperature influence degree, and the low temperature influence degree is linearly weighted and scaled according to the weight coefficient to obtain the corresponding low temperature influence score, that is, low temperature influence score = low temperature influence degree × weight coefficient; in specific implementation, the weight coefficient of the low temperature influence degree = (the relevant influence coefficient of the low temperature influence degree × the relative influence coefficient of the low temperature influence degree) / (the mean of the relevant influence coefficients × the mean of the relative influence coefficients).

[0075] Optionally, in some embodiments, the low temperature impact scores corresponding to different temperature points are fitted to obtain the low temperature impact score trajectory of the new energy vehicle air conditioner. The Lagrange interpolation method can be used to perform linear interpolation on the low temperature impact scores corresponding to different temperature points, thereby obtaining the low temperature impact score trajectory of the new energy vehicle air conditioner, wherein the low temperature impact score trajectory is a scoring function with different temperature values ​​as independent variables and the low temperature impact score as the dependent variable.

[0076] In step S105, the low temperature working test interval of the new energy vehicle air conditioner is determined according to the score distribution characteristics of the low temperature impact score in the low temperature impact score trajectory.

[0077] Optionally, in some embodiments, reference Figure 2 As shown, Figure 2 This is an exemplary flow chart for determining the low temperature working test interval in some embodiments of the present application. According to the score distribution characteristics of the low temperature impact score in the low temperature impact score trajectory, the low temperature working test interval of the new energy vehicle air conditioner can be determined by the following steps:

[0078] In step S1051, a preset standard threshold score is obtained;

[0079] In step S1052, feature extraction is performed on the low temperature impact scoring trajectory according to the standard threshold score to obtain a feature scoring node of the low temperature impact scoring trajectory, and a temperature value corresponding to the feature scoring node is used as the lower limit of the low temperature working test interval of the new energy vehicle air conditioner;

[0080] In step S1053, the rated operating temperature upper limit of the new energy vehicle air conditioner is obtained as the temperature upper limit of the low temperature working test interval of the new energy vehicle air conditioner.

[0081] In some embodiments, the low-temperature working test interval is a safe operating temperature range that is less affected by the low-temperature environment after testing the new energy vehicle air conditioner. The standard threshold score is calibrated to a constant based on historical experience, wherein the feature scoring node is a data point in the low-temperature impact scoring trajectory that is the same as the standard scoring threshold. In specific implementation, when there are multiple feature scoring nodes, the feature scoring node with the lowest corresponding temperature value is used as the final feature scoring node.

[0082] In specific implementation, it is possible to judge whether the new energy vehicle meets the working test requirements based on the low-temperature working test range of the new energy vehicle air conditioner, and then conduct further fault testing or return the new energy vehicle that does not meet the test requirements to the factory for rework, thereby improving the safety of the operation of the new energy vehicle air conditioner.

[0083] In addition, in another aspect of the present application, in some embodiments, the present application provides a new energy vehicle air conditioning test system, the device includes an air conditioning test unit, reference Figure 2 , which is a schematic diagram of exemplary hardware and / or software of an air conditioning test unit according to some embodiments of the present application, the air conditioning test unit 200 includes: an air conditioning exhaust test module 201 and a test result processing module 202, which are described as follows:

[0084] The air conditioning exhaust test module 201, in some specific embodiments of the present application, is mainly used to input an oil-gas mixture into the air conditioning of the new energy vehicle for compression testing, and test to obtain a first exhaust flow rate of the compressor in the air conditioning of the new energy vehicle;

[0085] The air conditioning exhaust test module 201 is further used to supplement the intermediate test gas to the new energy vehicle air conditioning and perform compression test again after the first exhaust flow rate of the new energy vehicle air conditioning is higher than a preset threshold, so as to obtain the second exhaust flow rate of the compressor in the new energy vehicle air conditioning;

[0086] The test result processing module 202 is used to adjust the speed of the compressor so that the second exhaust flow rate is consistent with the first exhaust flow rate, and calculate the low temperature influence of the new energy vehicle air conditioner by recording the change value of the compressor speed and the gas temperature difference value of the intermediate test gas;

[0087] The test result processing module 202 is further used to supplement intermediate test gas at different temperatures for compression testing, obtain low temperature influences corresponding to different temperatures, and perform correlation scores on the low temperature influences corresponding to different temperatures according to the air conditioner test speed, so as to determine the low temperature influence score trajectory of the new energy vehicle air conditioner;

[0088] The test result processing module 202 is further used to determine the low-temperature working test interval of the new energy vehicle air conditioner according to the score distribution characteristics of the low-temperature impact score in the low-temperature impact score trajectory.

[0089] The above describes in detail an example of a new energy vehicle air conditioning testing method and system provided in an embodiment of the present application. It can be understood that in order to realize the above functions, the corresponding device includes a hardware structure and / or software module corresponding to executing each function.

[0090] Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function in the application is executed in hardware or in a computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Therefore, professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0091] In addition, the present application also provides a computer terminal device, which includes a memory and a processor, the memory stores a code, and the processor is configured to obtain the code and execute the above-mentioned new energy vehicle air conditioning testing method.

[0092] In some embodiments, reference Figure 3 , which is a schematic diagram of the structure of a computer terminal device for implementing a new energy vehicle air conditioner test method according to some embodiments of the present application. The new energy vehicle air conditioner test method in the above embodiment can be Figure 3 The computer terminal device 300 shown in the figure is implemented, and the computer terminal device 300 includes at least one communication bus 301, a communication interface 302, a processor 303 and a memory 304.

[0093] The processor 303 may be a general-purpose central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of a new energy vehicle air conditioning test method in the present application.

[0094] The communication bus 301 may include a path for transmitting information between the above-mentioned components.

[0095] The memory 304 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compressed optical disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory 304 may exist independently and be connected to the processor 303 via the communication bus 301. The memory 304 may also be integrated with the processor 303.

[0096] The memory 304 is used to store the program code for executing the solution of the present application, and the execution is controlled by the processor 303. The processor 303 is used to execute the program code stored in the memory 304. The program code may include one or more software modules. The determination of the low temperature influence degree in the above embodiment can be implemented by the processor 303 and one or more software modules in the program code in the memory 304.

[0097] The communication interface 302 uses any transceiver or other device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

[0098] Optionally, the computer terminal device 300 may further include a power supply 305 for providing power to various devices or circuits in the real-time computer terminal device.

[0099] In a specific implementation, as an embodiment, a computer terminal device may include multiple processors, each of which may be a single-CPU processor or a multi-CPU processor. The processor here may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0100] The above-mentioned computer terminal device may be a general-purpose computer terminal device or a dedicated computer terminal device. In a specific implementation, the computer terminal device may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device or an embedded device. The embodiment of the present application does not limit the type of computer terminal device.

[0101] In addition, in other aspects of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores at least one computer program, and the computer program is loaded and executed by a processor to implement the operations performed by the above-mentioned new energy vehicle air conditioning testing method.

[0102] In summary, in a new energy vehicle air-conditioning testing method and system disclosed in an embodiment of the present application, first, an oil-gas mixture is input into the new energy vehicle air-conditioning for compression testing, and the first exhaust flow rate of the compressor in the new energy vehicle air-conditioning is obtained by testing; then, an intermediate test gas is added to the new energy vehicle air-conditioning and a compression test is performed again, and the second exhaust flow rate of the compressor in the new energy vehicle air-conditioning is obtained by testing; the speed of the compressor is adjusted so that the second exhaust flow rate is consistent with the first exhaust flow rate, and the low temperature influence degree of the new energy vehicle air-conditioning is calculated by recording the change value of the compressor speed and the gas temperature difference value of the intermediate test gas; intermediate test gases of different temperatures are added for compression testing to obtain the low temperature influence degrees corresponding to different temperatures, and the low temperature influence degrees corresponding to different temperatures are correlated and scored by the air-conditioning test speed to determine the low temperature influence scoring trajectory of the new energy vehicle air-conditioning; the low temperature working test interval of the new energy vehicle air-conditioning is determined according to the score distribution characteristics of the low temperature influence score in the low temperature influence scoring trajectory. The present application can test the air-conditioning according to the degree of influence of low temperature on the performance of the air-conditioning, thereby improving the stability of the operation of the new energy vehicle air-conditioning in a low temperature environment.

[0103] The above is only an embodiment of the present application, and the common knowledge such as the specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical scheme of the present application, several modifications and improvements can be made, which should also be regarded as the scope of protection of the present application, and these will not affect the effect of the implementation of the present application and the practicality of the patent.

[0104] The scope of protection claimed by this application shall be based on the content of its claims. The specific implementation methods and other records in the specification can be used to interpret the content of the claims. Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

1. A new energy vehicle air conditioning test method, characterized in that: include: Inputting an oil-gas mixture into the air conditioner of the new energy vehicle for compression testing, and testing to obtain a first exhaust flow rate of the compressor in the air conditioner of the new energy vehicle; After the first exhaust flow rate of the new energy vehicle air conditioner is higher than a preset threshold, the intermediate test gas is added to the new energy vehicle air conditioner and the compression test is performed again to obtain the second exhaust flow rate of the compressor in the new energy vehicle air conditioner; By adjusting the rotation speed of the compressor, the second exhaust flow rate is made consistent with the first exhaust flow rate, and by recording the change value of the rotation speed of the compressor and the gas temperature difference value of the intermediate test gas, the low temperature influence degree of the new energy vehicle air conditioner is calculated; Supplementing intermediate test gas of different temperatures for compression testing to obtain low-temperature impacts corresponding to different temperatures, and scoring the low-temperature impacts corresponding to different temperatures according to the air-conditioning test speed to determine the low-temperature impact scoring trajectory of the air-conditioning of the new energy vehicle; Determining the low temperature working test interval of the new energy vehicle air conditioner according to the score distribution characteristics of the low temperature impact score in the low temperature impact score trajectory; Wherein, the average value of the exhaust flow rate when the oil film is formed is used as the preset threshold; Among them, the low temperature impact corresponding to different temperatures is scored by the air conditioner test speed, and the low temperature impact score trajectory of the new energy vehicle air conditioner is determined specifically including: Obtain the low temperature impact and air conditioning test speed corresponding to different temperatures; For any low temperature influence degree, determine the relative influence coefficient between the low temperature influence degree and other low temperature influence degrees; For any low temperature influence degree, determine the correlation influence coefficient between the low temperature influence degree and the air conditioner test speed; According to the relevant influence coefficients and relative influence coefficients corresponding to the low-temperature influence degrees at different temperatures, the low-temperature influence scores corresponding to the different temperature points are determined, and the low-temperature influence scores corresponding to the different temperature points are fitted to obtain the low-temperature influence score trajectory of the new energy vehicle air conditioner; Wherein, for any low temperature influence degree, determining the relative influence coefficient of the low temperature influence degree with respect to other low temperature influence degrees specifically includes: Obtain the corresponding low temperature impact degree and air conditioning test speed at different temperatures; Determine the Pearson correlation coefficient between the low temperature effect and the air conditioning test speed at different temperatures; For any low temperature influence degree, determine the relative influence coefficient of the low temperature influence degree relative to other low temperature influence degrees according to the Pearson correlation coefficient; Among them, the relative influence coefficient corresponding to the low temperature influence degree = the average change ratio of the low temperature influence degree relative to the adjacent low temperature influence degree / the Pearson correlation coefficient between the low temperature influence degree and the air conditioner test speed; Wherein, for any low temperature influence degree, determining the correlation influence coefficient between the low temperature influence degree and the air conditioner test speed specifically includes: Determine the Pearson correlation coefficient between the low temperature effect and the air conditioning test speed at different temperatures; For any low temperature influence degree, determine the relative influence coefficient of the low temperature influence degree with respect to other low temperature influence degrees according to the Pearson correlation coefficient, and obtain the temperature value corresponding to the low temperature influence degree as the relevant temperature value; Normalize the air-conditioning test speeds corresponding to different temperatures to obtain a normalized sequence of air-conditioning test speeds; After fitting the normalized sequence of the air conditioner test speed, empirical mode decomposition is used to obtain the intrinsic mode function of the normalized sequence of the air conditioner test speed, and the correlation influence coefficient between the low temperature influence degree and the air conditioner test speed=|the relative influence coefficient×the Pearson correlation coefficient between the low temperature influence degree and the air conditioner test speed-the first-order derivative value of the intrinsic mode function corresponding to the relevant temperature value|; Among them, according to the score distribution characteristics of the low temperature impact score in the low temperature impact score trajectory, it is determined that the low temperature working test interval of the new energy vehicle air conditioner specifically includes: Obtaining a preset standard threshold score, where the standard threshold score is calibrated as a constant; Perform feature extraction on the low temperature impact scoring trajectory according to the standard threshold score to obtain a feature scoring node of the low temperature impact scoring trajectory, and use the temperature value corresponding to the feature scoring node as the lower limit of the low temperature working test interval of the new energy vehicle air conditioner; The rated operating temperature upper limit of the new energy vehicle air conditioner is obtained as the temperature upper limit of the low-temperature working test interval of the new energy vehicle air conditioner.

2. The method according to claim 1, characterized in that An air flow channel is arranged in front of the air intake port of the compressor, and a spray port is arranged on the air flow channel.

3. The method according to claim 1, characterized in that An electric scroll compressor is used as the compressor in the air conditioner of the new energy vehicle.

4. The method according to claim 1, characterized in that The first exhaust flow rate is collected by using a flow meter at the exhaust port of the compressor in the air conditioner of the new energy vehicle.

5. The method according to claim 1, characterized in that An air supply hole is provided on the static scroll disk of the compressor in the air conditioner of the new energy vehicle, and the intermediate test gas is injected into the compression chamber of the compressor through the air supply hole to mix with the original compressed gas.

6. A new energy vehicle air conditioning test system, which uses the method described in any one of claims 1 to 5 to test the new energy vehicle air conditioning, the system includes an air conditioning test unit, characterized in that: The air conditioning test unit comprises: An air conditioning exhaust test module, used for inputting an oil-gas mixture into the air conditioning of a new energy vehicle for compression testing, and testing to obtain a first exhaust flow rate of a compressor in the air conditioning of the new energy vehicle; The air conditioning exhaust test module is further used to supplement the intermediate test gas to the new energy vehicle air conditioning and perform a compression test again after the first exhaust flow rate of the new energy vehicle air conditioning is higher than a preset threshold, so as to obtain a second exhaust flow rate of the compressor in the new energy vehicle air conditioning; A test result processing module, used to adjust the speed of the compressor so that the second exhaust flow rate is consistent with the first exhaust flow rate, and calculate the low temperature influence of the new energy vehicle air conditioner by recording the change value of the speed of the compressor and the gas temperature difference value of the intermediate test gas; The test result processing module is used to supplement the intermediate test gas of different temperatures for compression testing, obtain the low temperature influence degrees corresponding to the different temperatures, and perform correlation scores on the low temperature influence degrees corresponding to the different temperatures according to the air conditioner test speed, so as to determine the low temperature influence score trajectory of the new energy vehicle air conditioner; The test result processing module is also used to determine the low-temperature working test range of the new energy vehicle air conditioner according to the score distribution characteristics of the low-temperature impact score in the low-temperature impact score trajectory.

7. A computer terminal device, characterized in that: The computer terminal device includes a memory and a processor, the memory stores codes, and the processor is configured to obtain the codes and execute the new energy vehicle air conditioning test method as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing at least one computer program, characterized in that: The computer program is loaded and executed by a processor to implement the operations performed by the new energy vehicle air conditioning testing method as described in any one of claims 1 to 5.

Images