Automobile air conditioning refrigerant purity detection method, system and electronic equipment

Abstract

The present invention discloses a method, system and electronic device for detecting the purity of automobile air-conditioning refrigerant, which monitors the pressure and temperature of the outlet of the air-conditioning condenser; calculates the supercooling degree of the air-conditioning condenser based on the pressure and temperature obtained by monitoring; determines the monitoring threshold value according to the ambient temperature; determines the first time value and the second time value based on the monitoring threshold value and the supercooling degree; and determines the air-conditioning refrigerant purity information according to the first time value and the second time value. The present invention obtains the refrigerant purity information by monitoring the supercooling degree of the air-conditioning condenser, thereby realizing the most effective and low-cost detection method, thereby improving the detection accuracy of the refrigerant purity and ensuring the refrigeration performance of the air-conditioning.

Description

Technical Field

[0001] The present invention relates to the field of automobile air conditioners, and in particular to a method, a device and an electronic device for detecting the purity of automobile air conditioner refrigerant. Background Art

[0002] In the vehicle air conditioning system, the purity of the refrigerant (such as R134a refrigerant) is an important indicator to ensure the effective operation of the air conditioning. The purer the refrigerant is and the more sufficient the amount is, the more sufficient the cooling capacity of the air conditioning system can be. If the refrigerant is impure or mixed with air, the system capacity will be insufficient, the air conditioning cooling performance will be insufficient, and the passenger experience will be poor. Summary of the invention

[0003] In view of the above problems, the present invention provides a method, system and electronic equipment for detecting the purity of automobile air-conditioning refrigerant, which improves the detection accuracy of the refrigerant purity and ensures the refrigeration performance of the air-conditioning.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A method for detecting purity of automobile air-conditioning refrigerant, comprising:

[0006] Monitor the pressure and temperature at the outlet of the air conditioner condenser;

[0007] Calculate the subcooling degree of the air conditioning condenser based on the pressure and temperature obtained by monitoring;

[0008] Determine the monitoring threshold based on the ambient temperature;

[0009] determining a first time value and a second time value based on the monitoring threshold and the degree of supercooling;

[0010] The air conditioner refrigerant purity information is determined according to the first time value and the second time value.

[0011] Optionally, the calculating the degree of subcooling of the air conditioner condenser based on the pressure and temperature obtained by monitoring includes:

[0012] By monitoring the obtained pressure, the saturation temperature of the air-conditioning refrigerant is obtained;

[0013] The difference between the saturation temperature and the temperature obtained by monitoring is calculated, and the difference is determined as the subcooling degree of the air conditioning condenser.

[0014] Optionally, determining the first time value and the second time value based on the monitoring threshold and the supercooling degree includes:

[0015] When the supercooling degree is greater than the monitoring threshold, obtaining the time value at this time as a first time value;

[0016] When the supercooling degree is equal to the monitoring threshold, the time value at this time is obtained as a second time value.

[0017] Optionally, determining the air conditioner refrigerant purity information according to the first time value and the second time value includes:

[0018] Calculating a time difference between the second time value and the first time value;

[0019] If the time difference is greater than a preset time threshold, it is determined that the air conditioner refrigerant purity is qualified;

[0020] Otherwise, it is determined that the purity of the air-conditioning refrigerant is unqualified.

[0021] Optionally, the method further comprises:

[0022] If the purity of the air-conditioning refrigerant is unqualified, a prompt message is generated, and the prompt message is used to prompt the refrigerant to be charged.

[0023] A car air-conditioning refrigerant purity detection system, comprising:

[0024] A monitoring unit for monitoring the pressure and temperature at the outlet of the air conditioner condenser;

[0025] A calculation unit, used for calculating the subcooling degree of the air conditioner condenser based on the pressure and temperature obtained by monitoring;

[0026] A first determining unit, configured to determine a monitoring threshold value according to an ambient temperature;

[0027] a second determining unit, configured to determine a first time value and a second time value based on the monitoring threshold and the supercooling degree;

[0028] The third determining unit is used to determine the purity information of the air conditioner refrigerant according to the first time value and the second time value.

[0029] Optionally, the computing unit includes:

[0030] A query subunit, used to query and obtain the saturation temperature of the air-conditioning refrigerant by monitoring the obtained pressure;

[0031] The first calculation subunit is used to calculate the difference between the saturation temperature and the temperature obtained by monitoring, and determine the difference as the subcooling degree of the air conditioner condenser.

[0032] Optionally, the second determining unit includes:

[0033] A first acquisition subunit is used for acquiring a first time value when the supercooling degree is greater than the monitoring threshold;

[0034] The second acquisition subunit is used to acquire the time value at this time as a second time value when the supercooling degree is equal to the monitoring threshold.

[0035] A storage medium stores computer program code, which, when executed, implements any one of the above methods for detecting the purity of automobile air-conditioning refrigerant.

[0036] An electronic device, comprising:

[0037] Memory, used to store programs;

[0038] A processor is used to execute the program, wherein the program is specifically used to:

[0039] Monitor the pressure and temperature at the outlet of the air conditioner condenser;

[0040] Calculate the subcooling degree of the air conditioning condenser based on the pressure and temperature obtained by monitoring;

[0041] Determine the monitoring threshold based on the ambient temperature;

[0042] determining a first time value and a second time value based on the monitoring threshold and the degree of supercooling;

[0043] The air conditioner refrigerant purity information is determined according to the first time value and the second time value.

[0044] Compared with the prior art, the present invention provides a method, system and electronic device for detecting the purity of automobile air-conditioning refrigerant, which monitors the pressure and temperature of the air-conditioning condenser outlet; calculates the subcooling degree of the air-conditioning condenser based on the pressure and temperature obtained by monitoring; determines the monitoring threshold value according to the ambient temperature; determines the first time value and the second time value based on the monitoring threshold value and the subcooling degree; and determines the air-conditioning refrigerant purity information according to the first time value and the second time value. The present invention obtains the refrigerant purity information by monitoring the subcooling degree of the air-conditioning condenser, realizing the most effective and low-cost detection method, thereby improving the detection accuracy of the refrigerant purity and ensuring the refrigeration performance of the air-conditioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0046] Figure 1 A schematic diagram of a flow chart of a method for detecting the purity of automobile air-conditioning refrigerant provided by an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of a pure refrigerant provided in an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of an impure refrigerant provided by an embodiment of the present invention;

[0049] Figure 4 A schematic structural diagram of a system for detecting the purity of a refrigerant in an automobile air conditioner provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The terms "first" and "second" and the like in the specification and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0052] In an embodiment of the present invention, a method for detecting the purity of a refrigerant in an automobile air-conditioning system is provided, which can be used to detect the purity of a refrigerant in an automobile air-conditioning system to ensure the normal operation of the automobile air-conditioning system. The method can be applied to an air-conditioning controller, a pressure sensor between the air-conditioning controller and an air-conditioning cooler outlet, a temperature sensor at an air-conditioning condenser outlet, and an external temperature sensor for detecting the ambient temperature.

[0053] See also Figure 1 The automobile air-conditioning refrigerant purity detection method may include the following steps:

[0054] S101. Monitor the pressure and temperature at the outlet of the air conditioner condenser.

[0055] When the vehicle air conditioning system is turned on, the pressure, temperature and ambient temperature of the air conditioning condenser outlet are obtained respectively through the pressure sensor at the air conditioning cooler outlet, the temperature sensor at the air conditioning condenser outlet and the external temperature sensor for detecting the ambient temperature.

[0056] S102: Calculate the subcooling degree of the air conditioner condenser based on the pressure and temperature obtained through monitoring.

[0057] After obtaining the pressure and temperature of the air conditioner condensation port through monitoring, the saturation temperature of the refrigerant can be obtained based on the pressure, and then the subcooling degree of the air conditioner condenser can be calculated by combining the saturation temperature and the temperature obtained through monitoring.

[0058] S103: Determine a monitoring threshold according to the ambient temperature.

[0059] S104: Determine a first time value and a second time value based on the monitoring threshold and the supercooling degree.

[0060] S105. Determine air conditioner refrigerant purity information according to the first time value and the second time value.

[0061] As the air conditioning system is turned on, the temperature of the condensation port and the ambient temperature will change. The temperature change of the air conditioning condensation port will cause the supercooling degree to change. In the embodiment of the present invention, the purity of the refrigerant is determined by monitoring the time of the supercooling degree change.

[0062] In order to monitor the supercooling degree, it is necessary to determine a monitoring threshold value according to the ambient temperature, assuming that the threshold value is C. In a possible embodiment, the monitoring threshold value may be variable, such as including a first threshold value and a second threshold value, and when the supercooling degree is within the value range corresponding to the first threshold value, a first time value is obtained, and when the supercooling degree is within the value range corresponding to the second threshold value, a second time value is obtained.

[0063] In another possible implementation, a monitoring threshold is set, and when the supercooling degree is greater than the monitoring threshold, the time value at this time is obtained as a first time value; when the supercooling degree is equal to the monitoring threshold, the time value at this time is obtained as a second time value.

[0064] Correspondingly, in an embodiment of the present invention, determining the air-conditioning refrigerant purity information based on the first time value and the second time value includes: calculating the time difference between the second time value and the first time value; if the time difference is greater than a preset time threshold, determining that the air-conditioning refrigerant purity is qualified; otherwise, determining that the air-conditioning refrigerant purity is unqualified.

[0065] In the embodiment of the present invention, the pressure obtained by monitoring can be used to obtain the saturation temperature of the air conditioner refrigerant by looking up the data corresponding to the refrigerant characteristics, and then the difference between the saturation temperature and the temperature obtained by monitoring is calculated, and the difference is determined as the subcooling degree of the air conditioner condenser.

[0066] In order to ensure the normal operation of the air-conditioning system, after obtaining the detection result of refrigerant impurity, the information can be generated into a corresponding prompt message, which can be prompted through the car display instrument or the corresponding instrument of the air-conditioning system to remind the user to refill the refrigerant to ensure the normal refrigeration performance of the air-conditioning system.

[0067] The automobile air-conditioning refrigerant purity detection method of the present invention is described below by taking R134a as an application example.

[0068] When the air conditioner is turned on, the air conditioner controller records the ambient temperature Tam, and the air conditioner controller records the time t0 when the customer turns on the air conditioner compressor. The compressor startup time is t0=0.

[0069] Monitor the pressure P1 and temperature T1 of the air conditioner condensation outlet.

[0070] The saturation temperature Tp corresponding to the R134a refrigerant is calculated by the pressure T1. The saturation temperature of the specific refrigerant at a specific pressure is determined by the refrigerant characteristics and can be obtained by querying the corresponding characteristic data table.

[0071] Calculate the subcooling degree SC of the air conditioning condenser, where SC = Tp-T1.

[0072] As the air conditioner is turned on, SC is monitored. When SC>C (C is the monitoring threshold set according to the ambient temperature), the time at this time is recorded as t1. Then, as the air conditioner is turned on for a longer time, the time t2 when SC drops to C is recorded.

[0073] Wherein, C is a variable related to the ambient temperature Tam, see Table 1, in which C1, C2, and C3 may be different values ​​of the monitoring threshold determined according to the ambient temperature.

[0074] Table 1

[0075] C Tam C1 Tam1≥Tam C2 Tam2≥Tam>Tam1 C3 Tam>Tam2

[0076] For example, according to specific application requirements, Tam1 and Tam2 are set to 1°C and 10°C respectively in the project.

[0077] Calculate the difference t between t2 and t1, that is, t = t2-t1. Compare t with B (time threshold). If t is greater than B, it is judged that the current refrigerant is pure, that is, the refrigerant purity is qualified, and the air conditioner refrigeration performance is normal. Usually the range of B is 60s≥B>10s. If t≤B, it is judged that the refrigerant is impure, and the air conditioner informs the instrument of this information to remind the customer to refill the refrigerant to ensure normal refrigeration performance.

[0078] See also Figure 2 and Figure 3 , Figure 2 A schematic diagram showing a pure refrigerant, Figure 3 A schematic diagram showing impure refrigerant is shown. Figure 2 and Figure 3 Here, SCd represents the degree of supercooling, A represents the determination start time t1, B represents the determination time (t2-t1), and C represents the threshold value of SCd.

[0079] The embodiment of the present invention provides a method for detecting the purity of automobile air-conditioning refrigerant, monitoring the pressure and temperature of the outlet of the air-conditioning condenser; calculating the subcooling degree of the air-conditioning condenser based on the pressure and temperature obtained by monitoring; determining the monitoring threshold value according to the ambient temperature; determining the first time value and the second time value based on the monitoring threshold value and the subcooling degree; and determining the air-conditioning refrigerant purity information according to the first time value and the second time value. The present invention obtains the refrigerant purity information by monitoring the subcooling degree of the air-conditioning condenser, realizing the most effective and low-cost detection method, thereby improving the detection accuracy of the refrigerant purity and ensuring the refrigeration performance of the air-conditioning.

[0080] See also Figure 4 , which shows a car air-conditioning refrigerant purity detection system provided by an embodiment of the present invention, comprising:

[0081] Monitoring unit 10, used to monitor the pressure and temperature of the air conditioner condenser outlet;

[0082] A calculation unit 20, for calculating the subcooling degree of the air conditioner condenser based on the pressure and temperature obtained by monitoring;

[0083] A first determining unit 30, configured to determine a monitoring threshold value according to the ambient temperature;

[0084] A second determining unit 40 is used to determine a first time value and a second time value based on the monitoring threshold and the supercooling degree;

[0085] The third determining unit 50 is used to determine the air conditioner refrigerant purity information according to the first time value and the second time value.

[0086] Based on the above embodiment, the calculation unit includes:

[0087] A query subunit, used to query and obtain the saturation temperature of the air-conditioning refrigerant by monitoring the obtained pressure;

[0088] The first calculation subunit is used to calculate the difference between the saturation temperature and the temperature obtained by monitoring, and determine the difference as the subcooling degree of the air conditioner condenser.

[0089] Based on the above embodiment, the second determining unit includes:

[0090] A first acquisition subunit is used for acquiring a first time value when the supercooling degree is greater than the monitoring threshold;

[0091] The second acquisition subunit is used to acquire the time value at this time as a second time value when the supercooling degree is equal to the monitoring threshold.

[0092] Based on the above embodiment, the third determining unit includes:

[0093] A second calculation subunit, used for calculating a time difference between the second time value and the first time value;

[0094] A first determination subunit, configured to determine that the purity of the air conditioner refrigerant is qualified if the time difference is greater than a preset time threshold;

[0095] The second determining subunit is used to determine that the purity of the air conditioner refrigerant is unqualified otherwise.

[0096] Based on the above embodiment, the system further includes:

[0097] The prompt unit is used to generate a prompt message if the purity of the air-conditioning refrigerant is unqualified, and the prompt message is used to prompt the refrigerant to be charged.

[0098] The present invention provides a refrigerant purity detection system for automobile air conditioners, wherein a monitoring unit monitors the pressure and temperature of an air conditioner condenser outlet; a calculation unit calculates the subcooling degree of the air conditioner condenser based on the pressure and temperature obtained by monitoring; a first determination unit determines a monitoring threshold value according to an ambient temperature; a second determination unit determines a first time value and a second time value based on the monitoring threshold value and the subcooling degree; and a third determination unit determines the refrigerant purity information of the air conditioner according to the first time value and the second time value. The present invention obtains the refrigerant purity information by monitoring the subcooling degree of the air conditioner condenser, thereby realizing the most effective and low-cost detection method, thereby improving the detection accuracy of the refrigerant purity and ensuring the refrigeration performance of the air conditioner.

[0099] In an embodiment of the present invention, a storage medium is further provided, wherein the storage medium stores a computer program code, and the computer program code executes any one of the above-mentioned methods for detecting the purity of the automobile air-conditioning refrigerant. Specifically, the computer program code can execute the following method:

[0100] Monitor the pressure and temperature at the outlet of the air conditioner condenser;

[0101] Calculate the subcooling degree of the air conditioning condenser based on the pressure and temperature obtained by monitoring;

[0102] Determine the monitoring threshold based on the ambient temperature;

[0103] determining a first time value and a second time value based on the monitoring threshold and the degree of supercooling;

[0104] The air conditioner refrigerant purity information is determined according to the first time value and the second time value.

[0105] Further, the subcooling degree of the air conditioner condenser is calculated based on the pressure and temperature obtained by monitoring, including:

[0106] By monitoring the obtained pressure, the saturation temperature of the air-conditioning refrigerant is obtained;

[0107] The difference between the saturation temperature and the temperature obtained by monitoring is calculated, and the difference is determined as the subcooling degree of the air conditioning condenser.

[0108] Further, determining the first time value and the second time value based on the monitoring threshold and the supercooling degree includes:

[0109] When the supercooling degree is greater than the monitoring threshold, obtaining the time value at this time as a first time value;

[0110] When the supercooling degree is equal to the monitoring threshold, the time value at this time is obtained as a second time value.

[0111] Further, determining the air conditioner refrigerant purity information according to the first time value and the second time value includes:

[0112] Calculating a time difference between the second time value and the first time value;

[0113] If the time difference is greater than a preset time threshold, it is determined that the air conditioner refrigerant purity is qualified;

[0114] Otherwise, it is determined that the purity of the air-conditioning refrigerant is unqualified.

[0115] Furthermore, the method further comprises:

[0116] If the purity of the air-conditioning refrigerant is unqualified, a prompt message is generated, and the prompt message is used to prompt the refrigerant to be charged.

[0117] On the other hand, an electronic device is also provided in an embodiment of the present invention, the electronic device comprising:

[0118] Memory, used to store programs;

[0119] A processor is used to execute the program, wherein the program is specifically used to:

[0120] Monitor the pressure and temperature at the outlet of the air conditioner condenser;

[0121] Calculate the subcooling degree of the air conditioning condenser based on the pressure and temperature obtained by monitoring;

[0122] Determine the monitoring threshold based on the ambient temperature;

[0123] determining a first time value and a second time value based on the monitoring threshold and the degree of supercooling;

[0124] The air conditioner refrigerant purity information is determined according to the first time value and the second time value.

[0125] Further, the subcooling degree of the air conditioner condenser is calculated based on the pressure and temperature obtained by monitoring, including:

[0126] By monitoring the obtained pressure, the saturation temperature of the air-conditioning refrigerant is obtained;

[0127] The difference between the saturation temperature and the temperature obtained by monitoring is calculated, and the difference is determined as the subcooling degree of the air conditioning condenser.

[0128] Further, determining the first time value and the second time value based on the monitoring threshold and the supercooling degree includes:

[0129] When the supercooling degree is greater than the monitoring threshold, obtaining the time value at this time as a first time value;

[0130] When the supercooling degree is equal to the monitoring threshold, the time value at this time is obtained as a second time value.

[0131] Further, determining the air conditioner refrigerant purity information according to the first time value and the second time value includes:

[0132] Calculating a time difference between the second time value and the first time value;

[0133] If the time difference is greater than a preset time threshold, it is determined that the air conditioner refrigerant purity is qualified;

[0134] Otherwise, it is determined that the purity of the air-conditioning refrigerant is unqualified.

[0135] Furthermore, the method further comprises:

[0136] If the purity of the air-conditioning refrigerant is unqualified, a prompt message is generated, and the prompt message is used to prompt the refrigerant to be charged.

[0137] Based on the foregoing embodiments, an embodiment of the present invention provides a computer-readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of any of the above automobile air-conditioning refrigerant purity detection methods.

[0138] It should be noted that the processor or CPU may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor. It is understandable that the electronic device that implements the functions of the processor may also be other, which is not specifically limited in the embodiments of the present invention.

[0139] It should be noted that the above-mentioned computer storage medium / memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory (Flash Memory), a magnetic surface memory, an optical disk, or a compact disc (CD-ROM) and other memories; it can also be various terminals including one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0140] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0141] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0142] In addition, all functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units. A person of ordinary skill in the art may understand that all or part of the steps of the above method embodiments may be completed by hardware related to program instructions, and the above program may be stored in a computer-readable storage medium, which, when executed, executes the steps of the above method embodiments; and the above storage medium includes various media that can store program codes, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks or optical disks.

[0143] The methods disclosed in the several method embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new method embodiments.

[0144] The features disclosed in several product embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new product embodiments.

[0145] The features disclosed in several method or device embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0146] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for detecting the purity of automobile air-conditioning refrigerant, characterized in that: include: Monitor the pressure and temperature at the outlet of the air conditioner condenser; Calculate the subcooling degree of the air conditioning condenser based on the pressure and temperature obtained by monitoring; Determine the monitoring threshold based on the ambient temperature; Based on the monitoring threshold and the supercooling degree, a first time value and a second time value are determined; wherein, in the case where the monitoring threshold changes, the monitoring threshold includes a first threshold and a second threshold, and when the supercooling degree is within a value range corresponding to the first threshold, the first time value is obtained, and when the supercooling degree is within a value range corresponding to the second threshold, the second time value is obtained; in the case where the monitoring threshold is a threshold, when the supercooling degree is greater than the monitoring threshold, the time value obtained at this time is the first time value, and when the supercooling degree is equal to the monitoring threshold, the time value obtained at this time is the second time value; Determining air conditioner refrigerant purity information according to the first time value and the second time value; Wherein, determining the air conditioner refrigerant purity information according to the first time value and the second time value includes: Calculating a time difference between the second time value and the first time value; If the time difference is greater than a preset time threshold, it is determined that the air conditioner refrigerant purity is qualified; Otherwise, it is determined that the purity of the air-conditioning refrigerant is unqualified.

2. The method according to claim 1, characterized in that The method of calculating the subcooling degree of the air conditioner condenser based on the pressure and temperature obtained by monitoring includes: By monitoring the obtained pressure, the saturation temperature of the air-conditioning refrigerant is obtained; The difference between the saturation temperature and the temperature obtained by monitoring is calculated, and the difference is determined as the subcooling degree of the air conditioning condenser.

3. The method according to claim 1, characterized in that The method further comprises: If the purity of the air-conditioning refrigerant is unqualified, a prompt message is generated, and the prompt message is used to prompt the refrigerant to be charged.

4. A car air conditioning refrigerant purity detection system, characterized in that: include: A monitoring unit for monitoring the pressure and temperature at the outlet of the air conditioner condenser; A calculation unit, used for calculating the subcooling degree of the air conditioner condenser based on the pressure and temperature obtained by monitoring; A first determining unit, configured to determine a monitoring threshold value according to an ambient temperature; A second determination unit is configured to determine a first time value and a second time value based on the monitoring threshold and the supercooling degree; wherein, in the case where the monitoring threshold changes, the monitoring threshold includes a first threshold and a second threshold, and when the supercooling degree is within a value range corresponding to the first threshold, the first time value is obtained, and when the supercooling degree is within a value range corresponding to the second threshold, the second time value is obtained; in the case where the monitoring threshold is a threshold, when the supercooling degree is greater than the monitoring threshold, the time value obtained at this time is the first time value, and when the supercooling degree is equal to the monitoring threshold, the time value obtained at this time is the second time value; a third determining unit, configured to determine the purity information of the air conditioner refrigerant according to the first time value and the second time value; The third determining unit determines the air conditioner refrigerant purity information according to the first time value and the second time value, including: Calculating a time difference between the second time value and the first time value; If the time difference is greater than a preset time threshold, it is determined that the air conditioner refrigerant purity is qualified; Otherwise, it is determined that the purity of the air-conditioning refrigerant is unqualified.

5. The system according to claim 4, characterized in that The computing unit comprises: A query subunit, used to query and obtain the saturation temperature of the air-conditioning refrigerant by monitoring the obtained pressure; The first calculation subunit is used to calculate the difference between the saturation temperature and the temperature obtained by monitoring, and determine the difference as the subcooling degree of the air conditioner condenser.

6. A storage medium, characterized in that: The storage medium stores computer program codes, and when the computer program codes are executed, the automobile air-conditioning refrigerant purity detection method according to any one of claims 1 to 3 is implemented.

7. An electronic device, characterized in that: The electronic device comprises: Memory, used to store programs; A processor is used to execute the program, wherein the program is specifically used to: Monitor the pressure and temperature at the outlet of the air conditioner condenser; Calculate the subcooling degree of the air conditioning condenser based on the pressure and temperature obtained by monitoring; Determine the monitoring threshold based on the ambient temperature; Based on the monitoring threshold and the supercooling degree, a first time value and a second time value are determined; wherein, in the case where the monitoring threshold changes, the monitoring threshold includes a first threshold and a second threshold, and when the supercooling degree is within a value range corresponding to the first threshold, the first time value is obtained, and when the supercooling degree is within a value range corresponding to the second threshold, the second time value is obtained; in the case where the monitoring threshold is a threshold, when the supercooling degree is greater than the monitoring threshold, the time value obtained at this time is the first time value, and when the supercooling degree is equal to the monitoring threshold, the time value obtained at this time is the second time value; Determining air conditioner refrigerant purity information according to the first time value and the second time value; Wherein, determining the air conditioner refrigerant purity information according to the first time value and the second time value includes: Calculating a time difference between the second time value and the first time value; If the time difference is greater than a preset time threshold, it is determined that the air conditioner refrigerant purity is qualified; Otherwise, it is determined that the purity of the air-conditioning refrigerant is unqualified.

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