Method, device and equipment for measuring air purification efficiency of vehicle passenger compartment and medium

Abstract

The invention relates to a method, device, equipment and medium for measuring the air purification efficiency of a vehicle passenger compartment, and the method comprises the steps: controlling the cooling liquid of a vehicle to be reduced to a preset temperature when the vehicle meets an air conditioning condition, a first ambient air temperature and humidity condition and a vehicle wheel end load condition; vehicle operation is controlled based on the first target pollutant concentration value and an air conditioner internal circulation strategy, and a first pollutant value in a passenger compartment and a second pollutant value outside the passenger compartment are measured; and when the vehicle meets the air conditioner condition, the second environment air temperature and humidity condition and the vehicle wheel end load condition, the engine is controlled to run at the constant speed for the preset duration, and after the engine stops running, the vehicle is controlled to run based on the second target pollutant concentration value and the air conditioner running strategy. Measuring a third pollutant value in the passenger compartment and a fourth pollutant value outside the passenger compartment; and obtaining a comprehensive purification efficiency value of the passenger compartment according to the first pollutant value, the second pollutant value, the third pollutant value and the fourth pollutant value.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle air purification, and in particular to a method, device, equipment and medium for measuring the air purification efficiency of a vehicle passenger compartment. Background Art

[0002] Moderate and heavy pollution weather occurs from time to time in some areas of my country. When the car is driving, pollutants in the outside environment gas will enter the passenger compartment through the gaps in the passenger compartment or through ventilation. In order to deal with this problem and provide clean air to the people in the passenger compartment, the car strengthens the airtightness of the passenger compartment and equips the air conditioning system with air filtration components, so that the concentration of pollutants in the car is lower than the concentration of pollutants in the outside environment, such as PM2.5, NOx, etc. Under the same environmental conditions, vehicles with relatively more closed passenger compartments and relatively more efficient air filtration systems can have less PM2.5 pollutants in the passenger compartment. The current standards for testing and evaluating the purification efficiency of local space pollutants are all oriented to the component level. For example, the air conditioning filter can be tested and evaluated based on different test standards to purify particulate matter and harmful gases. The efficiency of air purification in the passenger compartment of the whole vehicle has always lacked an industry-recognized test method.

[0003] In the application of evaluating the air purification efficiency of the passenger compartment of a light vehicle, in order to more accurately reproduce the vehicle's road driving status and facilitate the operation of the test process, it is expected to use a complete vehicle as the test object, with its surrounding environmental pollutant composition controlled, and a test method that can directly measure the surrounding environmental air pollutant values ​​and the passenger compartment's purified air pollutant values ​​to derive the purification efficiency value.

[0004] The related technology proposes a method to improve the air purification efficiency in the car based on a dual-channel PM2.5 sensor. The method uses a vehicle to detect the PM2.5 concentration inside and outside the car in real time and transmit the signal to the vehicle air conditioning controller, which automatically controls the internal and external circulation switching unit to switch modes and automatically controls the air volume gear. This method can prevent high-concentration PM2.5 dust outside the car from entering the car and ensure that clean air outside the car enters the car for fresh air ventilation, thereby effectively reducing the PM2.5 dust concentration in the car and ensuring the user's breathing health. The purpose and function of this patent is to achieve low PM2.5 dust concentration in the car.

[0005] The related art also proposes a control method for the air cleanliness control system of the passenger compartment of an automobile, which controls the air conditioner based on the oxygen addition forced switch, the negative ion generator forced switch, the window in place detection switch, the oxygen sensor, the negative ion concentration sensor, the particle concentration sensor and the heater core signal, thereby improving the cleanliness of the passenger compartment. The purpose and function of this patent is to optimize the three indicators of oxygen volume fraction, negative ion concentration and particle concentration.

[0006] However, the above two patents are not methods for testing and evaluating the efficiency of vehicle air conditioning systems in purifying gas in the passenger compartment, and cannot directly reflect the vehicle's ability to reduce harmful pollutants in the passenger compartment. The "In-Vehicle Particulate Matter (PM) Filtration Test Method" in the group standard stipulates the test method for the air conditioning's ability to filter particulate matter in the vehicle's air, but this method has two shortcomings. First, only the engine idling condition is selected, resulting in the active airflow management of the air conditioner not being able to properly represent the actual driving of the vehicle. Second, during the measurement phase, the particulate matter concentration in the environment outside the vehicle is no longer controlled by the test device, resulting in the PM value of the vehicle's environment declining and the degree of decline is out of control. The above two aspects cause the test process for passenger compartment purification to deviate from the actual driving conditions of the vehicle. Therefore, it is necessary to take measures to overcome the shortcomings of precedents in measuring the air purification efficiency of the passenger compartment of a complete vehicle. Summary of the invention

[0007] The present application provides a method, device, equipment and medium for measuring the air purification efficiency of a vehicle passenger compartment, so as to solve the problem of low test accuracy for passenger compartment purification in the prior art.

[0008] A first aspect of the present application provides a method for measuring the air purification efficiency of a vehicle passenger compartment, comprising the following steps: when the vehicle meets a preset air conditioning setting condition, a first ambient air temperature and humidity condition, and a vehicle wheel-end load condition, based on a preset vehicle immersion strategy, controlling the coolant of the vehicle to be reduced to a preset temperature, and controlling the vehicle to operate based on a first target pollutant concentration value and a preset air conditioning internal circulation strategy, and measuring a first pollutant value in the passenger compartment of the vehicle and a second pollutant value outside the passenger compartment; when the vehicle meets the preset air conditioning setting condition, the second ambient air temperature and humidity condition, and the vehicle wheel-end load condition, controlling the engine to operate at a constant speed for a preset time based on a preset engine operation strategy, and after the engine stops operating, controlling the vehicle to operate based on a second target pollutant concentration value and a preset air conditioning operation strategy, and measuring a third pollutant value in the passenger compartment and a fourth pollutant value outside the passenger compartment; obtaining a first air purification efficiency based on the first pollutant value and the second pollutant value, and obtaining a second air purification efficiency of the passenger compartment based on the third pollutant value and the fourth pollutant value, and obtaining a comprehensive purification efficiency value of the passenger compartment based on the first air purification efficiency and the second air purification efficiency.

[0009] Optionally, obtaining a first air purification efficiency based on the first pollutant value and the second pollutant value, and obtaining a second air purification efficiency of the passenger compartment based on the third pollutant value and the fourth pollutant value, comprises: calculating the first air purification efficiency and the second air purification efficiency using a preset pollutant purification efficiency calculation formula, wherein the preset pollutant purification efficiency calculation formula is:

[0010]

[0011] Among them, η PM_i is the i-th air purification efficiency, is the average PM concentration in the passenger cabin, is the average PM concentration outside the passenger compartment.

[0012] Optionally, obtaining the comprehensive purification efficiency value of the passenger compartment according to the first air purification efficiency and the second air purification efficiency includes: calculating the comprehensive purification efficiency value of the passenger compartment using a preset comprehensive purification efficiency value calculation formula, wherein the preset comprehensive purification efficiency value calculation formula is:

[0013] η all =ω×η cool +(1-ω)η hot ;

[0014] Among them, η all is the comprehensive purification efficiency value, ω is the preset value, η cool is η PM_1 , η hot is η PM_2 .

[0015] Optionally, after obtaining the comprehensive purification efficiency value of the passenger compartment, it includes: judging whether the comprehensive purification efficiency value is less than a warning threshold; if the comprehensive purification efficiency value is less than the warning threshold, sending a warning message to the target terminal.

[0016] According to a second aspect of the present application, there is provided a device for measuring the air purification efficiency of a vehicle passenger compartment, comprising: a first measuring module for controlling the coolant of the vehicle to be lowered to a preset temperature based on a preset vehicle immersion strategy when the vehicle meets preset air conditioning setting conditions, first ambient air temperature and humidity conditions, and vehicle wheel-end load conditions, and controlling the vehicle operation based on a first target pollutant concentration value and a preset air conditioning internal circulation strategy, and measuring a first pollutant value in the passenger compartment of the vehicle and a second pollutant value outside the passenger compartment; and a second measuring module for controlling the coolant of the vehicle to be lowered to a preset temperature based on a preset vehicle immersion strategy when the vehicle meets preset air conditioning setting conditions, second ambient air temperature and humidity conditions, and vehicle wheel-end load conditions. When the engine stops running, the engine is controlled to run at a constant speed for a preset time based on a preset engine operation strategy, and after the engine stops running, the vehicle operation is controlled based on a second target pollutant concentration value and a preset air-conditioning operation strategy, and a third pollutant value in the passenger compartment and a fourth pollutant value outside the passenger compartment are measured; a calculation module is used to obtain a first air purification efficiency based on the first pollutant value and the second pollutant value, and to obtain a second air purification efficiency of the passenger compartment based on the third pollutant value and the fourth pollutant value, and to obtain a comprehensive purification efficiency value of the passenger compartment according to the first air purification efficiency and the second air purification efficiency.

[0017] Optionally, the calculation module is further used to calculate the first air purification efficiency and the second air purification efficiency using a preset pollutant purification efficiency calculation formula, wherein the preset pollutant purification efficiency calculation formula is:

[0018]

[0019] Among them, η PM_i is the i-th air purification efficiency, is the average PM concentration in the passenger cabin, is the average PM concentration outside the passenger compartment.

[0020] Optionally, the calculation module is further used to calculate the comprehensive purification efficiency value of the passenger compartment using a preset comprehensive purification efficiency value calculation formula, wherein the preset comprehensive purification efficiency value calculation formula is:

[0021] η all =ω×η cool +(1-ω)η hot ;

[0022] Among them, η all is the comprehensive purification efficiency value, ω is the preset value, η cool is η PM_1 , η hot is η PM_2 .

[0023] Optionally, after obtaining the comprehensive purification efficiency value of the passenger compartment, the calculation module is also used to: determine whether the comprehensive purification efficiency value is less than a warning threshold; if the comprehensive purification efficiency value is less than the warning threshold, send a warning message to the target terminal.

[0024] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for measuring the air purification efficiency of a vehicle passenger compartment as described in the above embodiment.

[0025] The fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the method for measuring the air purification efficiency of a vehicle passenger compartment as described in the above embodiment.

[0026] In the above implementation, when the vehicle meets the air conditioning setting conditions, the first ambient air temperature and humidity conditions and the vehicle wheel end load conditions, the coolant of the vehicle is controlled to be reduced to a preset temperature based on the vehicle immersion strategy, the vehicle operation is controlled based on the first target pollutant concentration value and the air conditioning internal circulation strategy, and the first pollutant value in the passenger compartment and the second pollutant value outside the passenger compartment are measured; when the vehicle meets the air conditioning setting conditions, the second ambient air temperature and humidity conditions and the vehicle wheel end load conditions, the engine is controlled to run at a constant speed for a preset time, and after the engine stops running, the vehicle operation is controlled based on the second target pollutant concentration value and the air conditioning operation strategy, and the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment are measured; the first air purification efficiency is obtained based on the first pollutant value and the second pollutant value, and the second air purification efficiency of the passenger compartment is obtained based on the third pollutant value and the fourth pollutant value, and the comprehensive purification efficiency value of the passenger compartment is obtained. Thus, the problem of low accuracy of the test for passenger compartment purification in the prior art is solved, and the regulatory authorities of the automotive industry can effectively test whether the efficiency of the air conditioning purification system of a certain model is sufficient to effectively improve the air cleanliness in the vehicle in an atmospheric polluted environment and ensure the respiratory health of the occupants.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 A flow chart of a method for measuring air purification efficiency in a vehicle passenger compartment provided according to an embodiment of the present application;

[0030] Figure 2 It is a structural schematic diagram of a device for measuring the air purification efficiency of a vehicle passenger compartment according to one embodiment of the present application;

[0031] Figure 3 Schematic diagram of the arrangement of a probe for measuring PM concentration outside a vehicle according to an embodiment of the present application;

[0032] Figure 4 A flow chart of a method for measuring air purification efficiency in a vehicle passenger compartment in winter according to one embodiment of the present application;

[0033] Figure 5 A flow chart of a method for measuring air purification efficiency in a vehicle passenger compartment in summer according to one embodiment of the present application;

[0034] Figure 6 is an exemplary diagram of a device for measuring the air purification efficiency of a vehicle passenger compartment according to an embodiment of the present application;

[0035] Figure 7 Schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0037] The following describes the measurement method, device, equipment and medium of the air purification efficiency of the vehicle passenger compartment of the embodiment of the present application with reference to the accompanying drawings. In view of the problem of low accuracy of the test for passenger compartment purification in the prior art mentioned in the above background technology, the present application provides a method for measuring the air purification efficiency of the vehicle passenger compartment, in which when the vehicle meets the air conditioning setting conditions, the first ambient air temperature and humidity conditions and the vehicle wheel end load conditions, the coolant of the vehicle is controlled to be reduced to a preset temperature based on the vehicle immersion strategy, the vehicle operation is controlled based on the first target pollutant concentration value and the air conditioning internal circulation strategy, and the first pollutant value in the passenger compartment and the second pollutant value outside the passenger compartment are measured; when the vehicle meets the air conditioning setting conditions, the second ambient air temperature and humidity conditions and the vehicle wheel end load conditions, the engine is controlled to run at a constant speed for a preset time, and after the engine stops running, the vehicle is controlled to run based on the second target pollutant concentration value and the air conditioning operation strategy, and the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment are measured; the first air purification efficiency is obtained based on the first pollutant value and the second pollutant value, and the second air purification efficiency of the passenger compartment is obtained based on the third pollutant value and the fourth pollutant value, and the comprehensive purification efficiency value of the passenger compartment is obtained. This solves the problem of low accuracy in testing passenger compartment purification in the prior art. The automotive industry's regulatory authorities can effectively test whether the efficiency of a certain vehicle's air conditioning purification system is sufficient to effectively improve the cleanliness of the air in the vehicle in an air-polluted environment and ensure the breathing health of the passengers.

[0038] Specifically, Figure 1 A schematic flow chart of a method for measuring the air purification efficiency of a vehicle passenger compartment provided in an embodiment of the present application.

[0039] like Figure 1 As shown, the method for measuring the air purification efficiency of the vehicle passenger compartment includes the following steps:

[0040] The method for measuring the air purification efficiency of the vehicle passenger compartment is measured by using an air purification efficiency measuring device, wherein the structure of the air purification efficiency measuring device is as follows: Figure 2 As shown, it includes an engine air intake supply device 1, an engine exhaust output device 2; a PM sensor 3 in the passenger compartment; a PM sensor 4 outside the passenger compartment; a drum dynamometer 5; a particulate matter PM generator 6; a comparison calculation system 7; a control unit 8 of a pollutant injection system; a fan 9; a closed chamber 10 of RL-SHED; a temperature and humidity adjustment device 11 of the closed chamber of RL-SHED; and a test chamber shell 12 outside the RL-SHED.

[0041] The present application includes a pollutant injection system for a vehicle sealed compartment, a dual-channel pollutant measurement system for sampling the passenger compartment and the environment outside the vehicle, and a comparative calculation system for calculating the purification efficiency by calculating the dual-channel values. These devices are coordinated with the vehicle sealed compartment and the four-wheel drive drum chassis dynamometer of the running loss evaporation test integrated compartment (RL-SHED) that have been used today.

[0042] The Running Loss Evaporation Test Chamber (RL-SHED) is a commercialized test device in the automotive industry. The engine intake and exhaust of the vehicle are transported through a dedicated gas pipeline, which is isolated from the air in the closed chamber where the vehicle is located. Figure 2 1 and 2. The four-wheel drive drum chassis dynamometer function of the device is to provide appropriate simulated resistance based on the real-time vehicle speed so that the vehicle can reproduce its driving conditions on the road when driving on it. The temperature, humidity and airflow blowing to the vehicle in the closed compartment of the whole vehicle are monitored by the components of RL-SHED and can be controlled within the range of ±2℃ of the specified temperature value and ±5% of the specified humidity value; the cooling fan provides a wind speed equal to the speed value of the adopted cycle condition, thereby cooling the vehicle power system and making the gas in the closed compartment uniform.

[0043] A pollutant injection system consisting of a PM generator, PM sensor, and control unit is added to the vehicle's sealed compartment, and PID control is adopted. During the formal test, the pollutant concentration of the gas in the sealed compartment is stabilized at a specified value by the injection system. Before the formal test, the vehicle is pre-treated by driving, soaking, and irradiation with a solar radiation intensity of 850W / m2. Before the end of the pre-treatment, the pollutant injection system gradually increases the pollutant concentration in the sealed compartment from near zero to the specified value. The formal test is divided into two conditions representing winter and summer. In the former, the vehicle air conditioning system selects internal circulation and other settings are operated according to the requirements of A.2.4 "Warming device and defrosting device settings" of Appendix A of standard GB / T 19233. In the latter, the vehicle air conditioning system is operated according to B.2.4 "Air conditioning settings" of Appendix B of GB / T 19233. When operating, the air conditioning filtering function reduces the PM value of the passenger compartment, so that the output value of the PM sensor measuring the gas in the passenger compartment will be lower than the PM value of the outside environment. The dual-channel pollutant measurement system measures the pollutant values ​​inside and outside the passenger compartment respectively and sends them to the comparison calculation system. After the 30-minute CLTC_P cycle is completed, the comparative calculation system offline averages the PM concentration and other values ​​of the two channels at each second to calculate the purification efficiency for the winter and summer conditions respectively, and then performs weighted summation to obtain the comprehensive purification efficiency.

[0044] One of the devices of the present application is a dual-channel pollutant measurement system, and each channel is composed of a measuring device, a catheter, and a sampling probe. The particulate matter measurement device adopts a particulate matter PM sensor or a particulate matter sampler that complies with HJ 93-2013, with a resolution better than 1.0μg / m3 and a sampling frequency of not less than 1Hz, including but not limited to LD-5 laser dust meter, TSI8350, etc.; preferably, the particulate matter sampler is equipped with a PM2.5 cutter. The sampling probe for measuring pollutants in the passenger compartment is installed at the midpoint of the line connecting the center points of the two front headrests, pointing horizontally to the front of the vehicle; the measuring device (sensor) for measuring pollutants outside the vehicle is connected to the sampling probe outside the vehicle, and the height of the probe above the ground is equal to the height of the sampling probe measuring the passenger compartment, and the orientation is as follows: Figure 3 As shown, it is installed on the outside of the window glass of the second row of seats in the vehicle, pointing horizontally to the front of the vehicle, 15±2cm away from the window glass, and the distance from the rearview mirror should be enough to avoid the influence of eddy currents caused by the latter disturbing the airflow outside the vehicle. That is, the airflow blown by the fan has generally shown a smooth laminar flow when it passes through the rearview mirror and reaches the probe, which is conducive to stable and accurate measurement.

[0045] The second device of the present application is a pollutant injection system in a closed chamber, which functions to provide particulate matter PM2.5 and other pollutant gases and stabilize the concentration in the closed chamber at a set value. For example, the corresponding components in terms of particulate matter PM2.5 include a set of PM generators, a set of PM sensors and a set of control units, and the corresponding consumables are ISO 12103-1A0 (0-5μm test dust, preferably 0-3μm test dust). During the formal test, the control unit uses PID control based on the numerical relationship between the value of the PM sensor and the set value, and sends a command value to the particulate matter PM generator in real time to add a certain amount of PM, thereby making the PM value in the closed chamber approach and reach the set value. Particulate matter PM generators that serve as PID control command signal executors include but are not limited to RBG dust generators, QRJ-300 aerosol generators, dust aerosol generators DAG768, etc. The reason for additional pollutant injection during the formal test is that the PM concentration in the closed chamber will decrease due to two factors: first, a portion of the clean gas sucked in and filtered by the vehicle air conditioner will continue to return to the closed chamber through the exhaust one-way ventilation valve located on the fenders on both sides of the rear row of the passenger compartment after entering the passenger compartment, causing a small dilution of the PM concentration in the closed chamber; second, the particle settling characteristics cause it to continuously settle in trace amounts on the vehicle body shell and the test device shell. Preferably, the PM sensor of the pollutant injection system should be the same as the PM sensor of the external pollutant of the dual-channel pollutant measurement system. In particular, a PM sensor can be used to take into account both the closed chamber PM value measurement required for the control of this injection system and the external pollutant PM value measurement of the dual-channel pollutant measurement system, so as to reduce the cost of the entire device.

[0046] The pollutant injection system can be similarly configured with generators, sensors and control units for other pollutant gases, such as NO2. PID control is used to stabilize the corresponding concentration value of the gas in the closed chamber at the set value for testing. For vehicles with filters and other components configured in the air conditioning system that have NO2 conversion capabilities, the purification efficiency of the polluted gas is calculated after obtaining the values ​​of the two measurement channels of the pollutant in the formal test.

[0047] In step S101, when the vehicle meets preset air-conditioning setting conditions, first ambient air temperature and humidity conditions, and vehicle wheel-end load conditions, the coolant of the vehicle is controlled to be lowered to a preset temperature based on a preset vehicle immersion strategy, and the vehicle operation is controlled based on a first target pollutant concentration value and a preset air-conditioning internal circulation strategy, and the first pollutant value in the passenger compartment of the vehicle and the second pollutant value outside the passenger compartment are measured.

[0048] Among them, the preset air-conditioning setting condition is that the vehicle's air-conditioning filter is replaced with a component that has been aged for 3000km, and the vehicle's wheel-end load condition is that the vehicle is moved onto the drum, bound, connected to the vehicle's power system intake and exhaust, and the vehicle coasts to set the simulated load of the drum.

[0049] In step S102, when the vehicle meets the preset air-conditioning setting conditions, the second ambient air temperature and humidity conditions, and the vehicle wheel-end load conditions, the engine is controlled to run at a constant speed for a preset time based on the preset engine operation strategy, and after the engine stops running, the vehicle operation is controlled based on the second target pollutant concentration value and the preset air-conditioning operation strategy, and the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment are measured.

[0050] In step S103, a first air purification efficiency is obtained based on the first pollutant value and the second pollutant value, and a second air purification efficiency of the passenger compartment is obtained based on the third pollutant value and the fourth pollutant value, and a comprehensive purification efficiency value of the passenger compartment is obtained based on the first air purification efficiency and the second air purification efficiency.

[0051] Optionally, in some embodiments, obtaining a first air purification efficiency based on the first pollutant value and the second pollutant value, and obtaining a second air purification efficiency for the passenger compartment based on the third pollutant value and the fourth pollutant value, includes: calculating the first air purification efficiency and the second air purification efficiency using a preset pollutant purification efficiency calculation formula, wherein the preset pollutant purification efficiency calculation formula is:

[0052]

[0053] Among them, η PM_i is the i-th air purification efficiency, is the average PM concentration in the passenger cabin, is the average PM concentration outside the passenger compartment.

[0054] Optionally, in some embodiments, obtaining a comprehensive purification efficiency value of the passenger compartment according to the first air purification efficiency and the second air purification efficiency includes: calculating the comprehensive purification efficiency value of the passenger compartment using a preset comprehensive purification efficiency value calculation formula, wherein the preset comprehensive purification efficiency value calculation formula is:

[0055] η all =ω×η cool +(1-ω)η hot ; (2)

[0056] Among them, η all is the comprehensive purification efficiency value, ω is the preset value, η cool is η PM_1 , η hot is η PM_2 .

[0057] Optionally, in some embodiments, after obtaining the comprehensive purification efficiency value of the passenger compartment, it includes: judging whether the comprehensive purification efficiency value is less than a warning threshold; if the comprehensive purification efficiency value is less than the warning threshold, sending a warning message to the target terminal.

[0058] It should be understood that the present application places the vehicle in a gas environment filled with particulate matter PM2.5 and with controlled concentration. The set pollutant concentration value, ambient air temperature and humidity conditions, and vehicle wheel-end load conditions can give the vehicle as a whole and the vehicle air conditioning system a representative state of the various external conditions it experiences when it is working normally, so that the maintenance of passenger compartment gas cleanliness function and performance of the tested vehicle can be performed normally. For example, in a vehicle with an automatic air conditioning system, one of its preset strategies for operation in a test representing winter is that its airflow management switches with the cold and hot conditions of the vehicle, which restricts the evolution of the concentration of pollutants such as PM in the passenger compartment gas: in the initial few minutes of the test, the engine coolant temperature has not yet risen from 5°C to above 50°C, the engine does not heat the gas, and the gas flow rate sucked into the passenger compartment from the outside of the vehicle by the automatic air conditioning system is controlled to the minimum air volume or almost no air intake. The duration of the restricted condition depends on the technical means used by each model to accelerate the engine water temperature, such as about 200s or about 300s.

[0059] Specifically, two PM2.5 concentration settings were used in a closed cabin to measure the performance of the vehicle air conditioning's ability to purify the passenger compartment air in a cold and heavily polluted environment and in a hot and lightly polluted environment. The former corresponds to severe PM2.5 conditions in winter, and the latter corresponds to relatively mild PM2.5 conditions in summer, referred to as Condition 1 and Condition 2, respectively.

[0060] Among them, a preprocessing phase is arranged before the formal testing phase of this application.

[0061] The pretreatment step of Case 1, that is, the vehicle pretreatment step in winter, is as follows: A.3.2.4-A.3.2.7 and A3.3 of Appendix A of GB / T 19233-2020 are followed, except that the ambient temperature is changed from -7°C to 5°C, and the pollutant injection system is turned on after the vehicle is soaked so that the PM and other pollutants in the closed compartment reach the target value within 30 minutes. Among them, each filter unit of the tested air conditioner should first undergo aging equivalent to 3000 km of driving, and the aging method includes but is not limited to ISO / TS11155-1 standard.

[0062] The pretreatment stage of situation 2, that is, the vehicle pretreatment stage in summer, is as follows: in accordance with B.3.3.1-B.3.3.3 of Appendix B of GB / T 19233-2020, and in the immersion stage of the vehicle with a solar radiation intensity of 850W / m2 for 30 minutes in B.3.3.3, the pollutant injection system is turned on so that each pollutant in the closed chamber reaches the target value at the end of the immersion. Furthermore, before the pretreatment stage, PM or dust should be removed from the test chamber, the equipment in the chamber, the surfaces of the tested objects, and the clothes of the test operators, for example, by using wet wipes. Among them, each filter unit of the tested air conditioner should first undergo an aging equivalent to driving 3000km, and the aging method includes but is not limited to the ISO / TS11155-1 standard.

[0063] Preferably, the first ambient air temperature and humidity conditions in winter are temperature 5°C, humidity 50%, and the first pollutant value, i.e., PM value, is 120μg / m3; the second ambient air temperature and humidity conditions in summer are light solar radiation intensity 850W / m2, temperature 30°C, humidity 50%, and the second pollutant value, i.e., PM value, is 40μg / m3; furthermore, the PM values ​​of Case 1 and Case 2 between 1 and 1.3 times of the preferred values ​​are also options for test environmental PM values, depending on the typical values ​​of PM values ​​in recent years in the two seasons in major car-owning provinces across the country.

[0064] When the vehicle participates in the Situation 1 test, its air-conditioning system uses internal circulation and other settings are in accordance with A.2.4 of Appendix A of GB / T 19233-2020. When the vehicle participates in the Situation 2 test, the settings of its air-conditioning system are in accordance with B.2.4 of Appendix B of GB / T 19233-2020. During the formal test, the vehicle operates in the CLTC_P condition.

[0065] Furthermore, the measured parameter values ​​are calculated to obtain a comparative calculation system and method for purification efficiency. After the formal test CLTC_P cycle is completed, the dual-channel pollutant measurement system measures the first pollutant value in the passenger compartment and the second pollutant value outside the passenger compartment in winter, and the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment in summer. The comparative calculation system takes the average value of the pollutant values ​​of the two channels during the formal test of 1800s, and obtains the purification efficiency of PM pollutants in winter (i.e., the first air purification efficiency) and the purification efficiency of PM pollutants in summer (i.e., the second air purification efficiency) through formula (1).

[0066] Finally, the above two purification efficiency results represent the case 1 and the case 2 respectively, that is, the first air purification efficiency and the second air purification efficiency need to be weighted and summed based on their relative weights of the number of days in a year, and the comprehensive purification efficiency value ηall for the whole year is obtained by formula (2).

[0067] This test method realizes laboratory testing of a complete vehicle to reproduce the change process of the air state in the passenger compartment when it is driving on an air-polluted road. The test is fully representative and the test process is easy to operate.

[0068] In order to enable those skilled in the art to further understand the method for measuring the air purification efficiency of the vehicle passenger compartment of the embodiment of the present application, the following is a detailed description in conjunction with a specific embodiment. Figure 4 and Figure 5 shown.

[0069] The measurement method of air purification efficiency in winter is:

[0070] Step 1: Replace the vehicle's air conditioning filter with a part that has been aged for 3,000 km, and clean and dry the vehicle;

[0071] Step 2: Clean the air in the sealed chamber, adjust the temperature to 5°C and the humidity to 50%;

[0072] Step 3: Move the vehicle onto the drum, bind it, connect the vehicle's power system intake and exhaust, and slide the vehicle to set the simulated load of the drum;

[0073] Step 4: The vehicle runs the CLTC_P cycle for pre-processing;

[0074] Step 5: Soak the vehicle for 8 hours, and the vehicle coolant temperature drops to 5±2℃;

[0075] Step 6: The sampling pipelines of the two channels are connected to the designated position inside the vehicle and the position of the "sealed compartment outside the vehicle" respectively;

[0076] Step 7: Close the doors and windows, turn on the PM generator of the test device, and raise the PM value to 120μg / m within 30 minutes. 3 and maintain;

[0077] Step 8: Open the door for 30 seconds to make the gas in the passenger compartment consistent with the airtight compartment, and then close the door;

[0078] Step 9: Turn on all instruments, set the car air conditioner to internal circulation and other settings in accordance with the provisions of Appendix A of GB / T19233, for example, front defrost;

[0079] Step 10: Run the CLTC_P test cycle to conduct a formal test, sampling and recording the values ​​of the two channels;

[0080] Step 11: Calculate the vehicle's passenger compartment air purification efficiency using formula (1).

[0081] The air purification efficiency in summer is measured as follows:

[0082] Step 1: Replace the vehicle's air conditioning filter with a part that has been aged for 3,000 km, and clean and dry the vehicle;

[0083] Step 2: Clean the air in the sealed chamber, adjust the temperature to 30°C and the humidity to 50%;

[0084] Step 3: Move the vehicle onto the drum, bind it, connect the vehicle's power system intake and exhaust, and slide the vehicle to set the simulated load of the drum

[0085] Step 4: The vehicle runs at a constant speed of 90 km / h for 20 minutes for pre-treatment;

[0086] Step 5: The sampling pipelines of the two channels are connected to the designated position inside the vehicle and the designated position of the "sealed compartment outside the vehicle";

[0087] Step 6: Turn off the engine and doors and windows. Set the solar radiation intensity and leave the vehicle stationary.

[0088] Step 7: Turn on the PM generator and raise the PM value to 40 μg / m 3 and maintain;

[0089] Step 8: When the vehicle has been stationary for 30 minutes, open the door for 30 seconds to allow the gas in the passenger compartment to be consistent with the airtight compartment, and then close the door;

[0090] Step 9: Turn on all instruments and set the automobile air conditioning system according to Appendix B of GB / T19233;

[0091] Step 10: Run the CLTC_P test cycle to conduct a formal test, sampling and recording the values ​​of the two channels;

[0092] Step 11: Calculate the vehicle's passenger compartment air purification efficiency using formula (1).

[0093] Based on this test method, the regulatory authorities of the automotive industry can effectively test whether the efficiency of the air conditioning purification system of a certain model is sufficient to effectively improve the cleanliness of the air inside the car in an air-polluted environment and ensure the breathing health of the passengers. Furthermore, the threshold of the air conditioning purification efficiency value can be specified in the corresponding evaluation procedures, such as the median or average of the air conditioning purification efficiency values ​​of the vehicle group obtained after surveying a number of representative models with this test method. The procedures and thresholds can guide the popularization of passenger car models to adopt more advanced air conditioning purification systems and promote industrial progress.

[0094] According to the method for measuring the air purification efficiency of a vehicle passenger compartment proposed in an embodiment of the present application, when the vehicle meets the air-conditioning setting conditions, the first ambient air temperature and humidity conditions, and the vehicle wheel-end load conditions, the coolant of the vehicle is controlled to be lowered to a preset temperature based on the vehicle immersion strategy, the vehicle operation is controlled based on the first target pollutant concentration value and the air-conditioning internal circulation strategy, and the first pollutant value in the passenger compartment and the second pollutant value outside the passenger compartment are measured; when the vehicle meets the air-conditioning setting conditions, the second ambient air temperature and humidity conditions, and the vehicle wheel-end load conditions, the engine is controlled to run at a constant speed for a preset time, and after the engine stops running, the vehicle operation is controlled based on the second target pollutant concentration value and the air-conditioning operation strategy, and the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment are measured; the first air purification efficiency is obtained based on the first pollutant value and the second pollutant value, and the second air purification efficiency of the passenger compartment is obtained based on the third pollutant value and the fourth pollutant value, so as to obtain a comprehensive purification efficiency value of the passenger compartment.

[0095] Next, a device for measuring the air purification efficiency of a vehicle passenger compartment proposed in an embodiment of the present application will be described with reference to the accompanying drawings.

[0096] Figure 6 It is a block diagram of a device for measuring the air purification efficiency of a vehicle passenger compartment according to an embodiment of the present application.

[0097] like Figure 6 As shown, the measuring device 10 for the air purification efficiency of the vehicle passenger compartment includes: a first measuring module 100 , a second measuring module 200 and a calculating module 300 .

[0098] Among them, the first measurement module 100 is used to control the coolant of the vehicle to be reduced to a preset temperature based on a preset vehicle immersion strategy when the vehicle meets the preset air conditioning setting conditions, the first ambient air temperature and humidity conditions and the vehicle wheel end load conditions, and control the vehicle operation based on the first target pollutant concentration value and the preset air conditioning internal circulation strategy, and measure the first pollutant value in the passenger compartment of the vehicle and the second pollutant value outside the passenger compartment; the second measurement module 200 is used to control the engine to run at a constant speed for a preset time based on the preset engine operation strategy when the vehicle meets the preset air conditioning setting conditions, the second ambient air temperature and humidity conditions and the vehicle wheel end load conditions, and control the vehicle operation based on the second target pollutant concentration value and the preset air conditioning operation strategy after the engine stops running, and measure the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment; the calculation module 300 is used to obtain a first air purification efficiency based on the first pollutant value and the second pollutant value, and obtain a second air purification efficiency of the passenger compartment based on the third pollutant value and the fourth pollutant value, and obtain a comprehensive purification efficiency value of the passenger compartment based on the first air purification efficiency and the second air purification efficiency.

[0099] Optionally, in some embodiments, the calculation module 300 is further used to calculate the first air purification efficiency and the second air purification efficiency using a preset pollutant purification efficiency calculation formula, wherein the preset pollutant purification efficiency calculation formula is:

[0100]

[0101] Among them, η PM_i is the i-th air purification efficiency, is the average PM concentration in the passenger cabin, is the average PM concentration outside the passenger compartment.

[0102] Optionally, in some embodiments, the calculation module 300 is further used to calculate the comprehensive purification efficiency value of the passenger compartment using a preset comprehensive purification efficiency value calculation formula, wherein the preset comprehensive purification efficiency value calculation formula is:

[0103] η all =ω×η cool +(1-ω)η hot ;

[0104] Among them, η all is the comprehensive purification efficiency value, ω is the preset value, η cool is η PM_1 , η hot is η PM_2 .

[0105] Optionally, in some embodiments, after obtaining the comprehensive purification efficiency value of the passenger compartment, the calculation module 300 is also used to: determine whether the comprehensive purification efficiency value is less than the warning threshold; if the comprehensive purification efficiency value is less than the warning threshold, send a warning message to the target terminal.

[0106] It should be noted that the above explanation of the embodiment of the method for measuring the air purification efficiency of the vehicle passenger compartment is also applicable to the device for measuring the air purification efficiency of the vehicle passenger compartment of this embodiment, and will not be repeated here.

[0107] According to the measuring device of the air purification efficiency of the vehicle passenger compartment proposed in the embodiment of the present application, when the vehicle meets the air conditioning setting conditions, the first ambient air temperature and humidity conditions and the vehicle wheel end load conditions, the coolant of the vehicle is controlled to be reduced to a preset temperature based on the vehicle immersion strategy, the vehicle operation is controlled based on the first target pollutant concentration value and the air conditioning internal circulation strategy, and the first pollutant value in the passenger compartment and the second pollutant value outside the passenger compartment are measured; when the vehicle meets the air conditioning setting conditions, the second ambient air temperature and humidity conditions and the vehicle wheel end load conditions, the engine is controlled to run at a constant speed for a preset time, and after the engine stops running, the vehicle operation is controlled based on the second target pollutant concentration value and the air conditioning operation strategy, and the third pollutant value in the passenger compartment and the fourth pollutant value outside the passenger compartment are measured; the first air purification efficiency is obtained based on the first pollutant value and the second pollutant value, and the second air purification efficiency of the passenger compartment is obtained based on the third pollutant value and the fourth pollutant value, and the comprehensive purification efficiency value of the passenger compartment is obtained. Thus, the problem of low accuracy of the test for passenger compartment purification in the prior art is solved, and the regulatory authorities of the automotive industry can effectively test whether the efficiency of the air conditioning purification system of a certain model is sufficient to effectively improve the air cleanliness in the car in an atmospheric polluted environment and ensure the breathing health of the occupants.

[0108] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0109] A memory 701 , a processor 702 , and a computer program stored in the memory 701 and executable on the processor 702 .

[0110] When the processor 702 executes the program, the method for measuring the air purification efficiency of the vehicle passenger compartment provided in the above embodiment is implemented.

[0111] Furthermore, the electronic device further comprises:

[0112] The communication interface 703 is used for communication between the memory 701 and the processor 702 .

[0113] The memory 701 is used to store computer programs that can be executed on the processor 702 .

[0114] The memory 701 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0115] If the memory 701, the processor 702 and the communication interface 703 are implemented independently, the communication interface 703, the memory 701 and the processor 702 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0116] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can communicate with each other through an internal interface.

[0117] The processor 702 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0118] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for measuring the air purification efficiency of a vehicle passenger compartment.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0120] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0121] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0122] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable storage medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or N wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0123] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0124] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0125] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0126] The computer-readable storage medium mentioned above may be a read-only memory, a disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for measuring the air purification efficiency of a vehicle passenger compartment, characterized in that: The following steps are involved: When the vehicle meets a preset air conditioning setting condition, a first ambient air temperature and humidity condition, and a vehicle wheel-end load condition, the coolant of the vehicle is controlled to be lowered to a preset temperature based on a preset vehicle immersion strategy, and the vehicle is controlled to run based on a first target pollutant concentration value and a preset air conditioning internal circulation strategy, and a first pollutant value in a passenger compartment of the vehicle and a second pollutant value outside the passenger compartment are measured; When the vehicle meets the preset air conditioning setting condition, the second ambient air temperature and humidity condition, and the vehicle wheel end load condition, the engine is controlled to run at a constant speed for a preset time period based on a preset engine operation strategy, and after the engine stops running, the vehicle is controlled to run based on a second target pollutant concentration value and a preset air conditioning operation strategy, and a third pollutant value in the passenger compartment and a fourth pollutant value outside the passenger compartment are measured; A first air purification efficiency is obtained based on the first pollutant value and the second pollutant value, and a second air purification efficiency of the passenger compartment is obtained based on the third pollutant value and the fourth pollutant value, and a comprehensive purification efficiency value of the passenger compartment is obtained based on the first air purification efficiency and the second air purification efficiency.

2. The method according to claim 1, characterized in that The obtaining of a first air purification efficiency based on the first pollutant value and the second pollutant value, and obtaining of a second air purification efficiency of the passenger compartment based on the third pollutant value and the fourth pollutant value, comprises: The first air purification efficiency and the second air purification efficiency are calculated using a preset pollutant purification efficiency calculation formula, wherein the preset pollutant purification efficiency calculation formula is: Among them, η PM_i is the i-th air purification efficiency, is the average PM concentration in the passenger cabin, is the average PM concentration outside the passenger compartment.

3. The method according to claim 2, characterized in that The obtaining, according to the first air purification efficiency and the second air purification efficiency, a comprehensive purification efficiency value of the passenger compartment includes: The comprehensive purification efficiency value of the passenger compartment is calculated using a preset comprehensive purification efficiency value calculation formula, wherein the preset comprehensive purification efficiency value calculation formula is: or all =ω×η cool +(1-ω)η hot ; Among them, η all is the comprehensive purification efficiency value, ω is the preset value, η cool is η PM_1 , η hot is η PM_2 .

4. The method according to claim 1, characterized in that: After obtaining the comprehensive purification efficiency value of the passenger compartment, including: Determining whether the comprehensive purification efficiency value is less than a warning threshold; If the comprehensive purification efficiency value is less than the warning threshold, a warning message is sent to the target terminal.

5. A device for measuring the air purification efficiency of a vehicle passenger compartment, characterized in that: include: a first measuring module, configured to control the coolant of the vehicle to be lowered to a preset temperature based on a preset vehicle immersion strategy when the vehicle meets a preset air conditioning setting condition, a first ambient air temperature and humidity condition, and a vehicle wheel end load condition, and to control the vehicle to run based on a first target pollutant concentration value and a preset air conditioning internal circulation strategy, and to measure a first pollutant value in a passenger compartment of the vehicle and a second pollutant value outside the passenger compartment; a second measuring module, configured to control the engine to run at a constant speed for a preset time period based on a preset engine operation strategy when the vehicle meets the preset air conditioning setting condition, the second ambient air temperature and humidity condition, and the vehicle wheel end load condition, and to control the vehicle operation based on a second target pollutant concentration value and a preset air conditioning operation strategy after the engine stops running, and to measure a third pollutant value in the passenger compartment and a fourth pollutant value outside the passenger compartment; A calculation module is used to obtain a first air purification efficiency based on the first pollutant value and the second pollutant value, and to obtain a second air purification efficiency of the passenger compartment based on the third pollutant value and the fourth pollutant value, and to obtain a comprehensive purification efficiency value of the passenger compartment based on the first air purification efficiency and the second air purification efficiency.

6. The device according to claim 5, characterized in that The computing module is further used for: The first air purification efficiency and the second air purification efficiency are calculated using a preset pollutant purification efficiency calculation formula, wherein the preset pollutant purification efficiency calculation formula is: Among them, η PM_i is the i-th air purification efficiency, is the average PM concentration in the passenger cabin, is the average PM concentration outside the passenger compartment.

7. The device according to claim 5, characterized in that The computing module is further used for: The comprehensive purification efficiency value of the passenger compartment is calculated using a preset comprehensive purification efficiency value calculation formula, wherein the preset comprehensive purification efficiency value calculation formula is: or all =ω×η cool +(1-ω)η hot ; Among them, η all is the comprehensive purification efficiency value, ω is the preset value, η cool is η PM_1 , η hot is η PM_2 .

8. The device according to claim 5, characterized in that After obtaining the comprehensive purification efficiency value of the passenger compartment, the calculation module is further used to: Determining whether the comprehensive purification efficiency value is less than a warning threshold; If the comprehensive purification efficiency value is less than the warning threshold, a warning message is sent to the target terminal.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for measuring the air purification efficiency of a vehicle passenger compartment as claimed in any one of claims 1 to 4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for measuring the air purification efficiency of a vehicle passenger compartment as described in any one of claims 1 to 4.

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