In-vehicle air pollutant purification function environment simulation test system and method

Abstract

The invention relates to the technical field of in-vehicle pollution purification testing, in particular to an in-vehicle air pollutant purification function environment simulation testing system and method. According to the system, a clamping cabin is located in an outer cabin, and a tested vehicle is placed in the clamping cabin; the dual-circulation air duct is used for continuously maintaining the stability of the temperature and humidity in the cabin through the inner circulation air duct and discharging pollutants when the cabin is polluted through the outer circulation air duct; the pollutant generating device comprises a generator for various pollutants and is used for simulating various polluted environments in the clamping cabin; the air stirring system is used for promoting air to flow around the tested vehicle, so that pollutants are uniformly dispersed and prevented from settling, and meanwhile, heat of the outer cabin is accelerated to be transferred to each position of the clamping cabin; and the temperature and humidity air internal circulation pipeline is used for regulating and controlling the temperature and the humidity of the clamping cabin through the independent internal circulation air duct. The invention provides simulation of various air pollution working conditions in a laboratory environment and how to carry out effective testing under the working conditions.

Description

Technical Field

[0001] The present application relates to the technical field of in-vehicle pollution purification testing, and in particular to a system and method for simulating a test environment for in-vehicle air pollutant purification functions. Background Art

[0002] In-vehicle air quality encompasses far more than just volatile substances like pentyltrialdehyde released by the vehicle itself. It also includes various components that enter the vehicle from outside air, such as particulate matter, dust, flying dust, catkins, viruses, and pollen. These pollutants pose a threat to human health, affecting the respiratory, cardiovascular, and immune systems, increasing the risk of disease, and potentially causing eye and skin irritation and leading to various allergic symptoms.

[0003] Current testing for in-vehicle air quality primarily focuses on detecting volatile substances like pentyltrialdehyde released from interior materials. However, testing methods for pollutants entering the vehicle through the air are relatively scarce. Existing testing methods primarily assess filtration efficiency at the air conditioning component level, but lack vehicle-level testing. This significantly differs from actual vehicle usage scenarios. Therefore, accurately assessing a vehicle's ability to block and purify external pollutants has become a pressing issue, necessitating the establishment of a corresponding testing system.

[0004] Furthermore, the purification efficiency of vehicle purification systems varies significantly across seasons, temperature, and humidity environments. However, neither indoor pollutant testing standards nor current vehicle particulate matter testing standards fully consider the impact of environmental factors on active filtration effectiveness.

[0005] In view of this, this application is filed. Summary of the Invention

[0006] The purpose of this application is to provide an environmental simulation test system and method for the in-vehicle air pollutant purification function, so as to propose a vehicle-level, environment-adjustable test scheme for the in-vehicle pollution purification function.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application provides an environmental simulation test system for the purification function of air pollutants in a vehicle, comprising: an outer cabin, a dual-circulation air duct located within the outer cabin, an interlayer cabin, an air agitation system and a temperature and humidity air internal circulation pipeline located within the interlayer cabin, and a pollutant generating device; the interlayer cabin is located within the outer cabin, and a vehicle under test is placed in the interlayer cabin; The dual circulation air duct is used to continuously maintain stable temperature and humidity in the cabin through the inner circulation air duct, and to discharge pollutants through the outer circulation air duct when pollution occurs; The pollutant generating device includes generators of various pollutants, which are used to simulate various pollutant environments in the cabin; The air agitation system is used to promote air flow around the vehicle under test, so that pollutants are evenly dispersed to prevent sedimentation, and at the same time accelerate the transfer of heat from the outer cabin to various locations in the inter-cabin; The temperature and humidity air internal circulation pipeline is used to control the temperature and humidity of the compartment through an independent internal circulation air duct.

[0008] In a second aspect, the present application provides a method for simulating a vehicle interior air pollutant purification function environment. The method is executed by a host computer using a system for simulating a vehicle interior air pollutant purification function environment. The method includes: After the vehicle under test is placed in the compartment, the temperature and humidity of the outer compartment are adjusted to a first specified range through the dual circulation air duct; the temperature and humidity of the compartment are adjusted to a second specified range through the temperature and humidity air internal circulation pipeline; Start the pollutant generating device and air agitation system; Collect pollutant concentrations inside the vehicle; The pollutant concentration in the vehicle is compared with a concentration threshold value, and the pollutant purification function of the tested vehicle is tested.

[0009] Compared with the prior art, the present invention has the following advantages: This application has made significant innovations and breakthroughs in the field of automobile physical and chemical performance testing, and proposed: simulating various air pollution conditions in a laboratory environment, and how to conduct effective testing under such conditions. The current industry lacks a systematic testing method for the purification capacity of various particulate matter at the vehicle level, and the vehicle's purification capacity is actually affected by a combination of factors, including air conditioning filter performance, air conditioning power, air duct layout rationality, intelligent control strategy quality, synergistic effect of other purification devices, and overall vehicle sealing. The environmental simulation test system of this application can accurately simulate various complex air pollution conditions during vehicle use, and comprehensively and in-depth evaluate the vehicle's purification capacity through actual vehicle testing, effectively filling the gap in the industry. With the help of this system, automobile manufacturers can accurately quantify the purification performance of vehicles in different pollution scenarios, thereby scientifically formulating purification strategies, optimizing the design of vehicle air purification systems, significantly improving the air quality in the vehicle, enhancing product market competitiveness, and promoting technological progress and development in the automotive industry in the field of in-vehicle environmental health. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 This is a front view of an environmental simulation test system for air pollutant purification function in a vehicle provided by an embodiment of the present application; Figure 2 This is a side view of an environmental simulation test system for air pollutant purification function in a vehicle provided by an embodiment of the present application; Figure 3 This is a top view of an environmental simulation test system for air pollutant purification function in a vehicle provided by an embodiment of the present application; Figure 4 This is a structural diagram of a compartment provided in an embodiment of the present application; Figure 5 Schematic diagram of the interaction between the device in the clamping cabin and the host computer provided in an embodiment of the present application; Figure 6 This is a flow chart of an environmental simulation test method for the in-vehicle air pollutant purification function provided in an embodiment of the present application. DETAILED DESCRIPTION

[0012] The following description of exemplary embodiments of the present application is made in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0013] Figure 1 This is a front view of an environmental simulation test system for air pollutant purification function in a vehicle provided by an embodiment of the present application. Figure 2 This is a side view of an environmental simulation test system for air pollutant purification function in a vehicle provided by an embodiment of the present application. Figure 3 This is a top view of an environmental simulation test system for the in-vehicle air pollutant purification function provided in an embodiment of the present application. Figure 4 This is a structural schematic diagram of the compartment provided in an embodiment of the present application.

[0014] See also Figures 1 to 4 The system provided in this application includes an outer cabin, a dual-circulation air duct (not shown) located inside the outer cabin, an inter-cabin, an air agitation system and a temperature and humidity air internal circulation pipeline located inside the inter-cabin, and a pollutant generating device; the inter-cabin is located inside the outer cabin, and the vehicle under test is placed in the inter-cabin. Figure 1 and Figure 2 The vehicle enters the outer cabin from the outer cabin, and then enters the inter-cabin through the inter-cabin door.

[0015] Each component is described in detail below.

[0016] The outer cabin features wide-range temperature and humidity control capabilities, allowing precise adjustment between -20°C and 80°C, while maintaining a stable humidity between 20% and 80% relative humidity, effectively simulating diverse seasons and complex operating conditions. The outer cabin's air duct integrates activated carbon and particulate matter purification devices, creating a dual-circulation system. This system maintains stable cabin temperature and humidity through an inner circulation duct and removes pollutants through an outer circulation duct in the event of contamination, ensuring clean air in the outer cabin and preventing the spread of contamination. The outer cabin's circulation motor utilizes advanced variable frequency technology to precisely control cabin air velocity, maintaining a stable velocity within 0.3 m / s during routine testing, meeting stringent wind speed requirements such as those imposed by VOC testing. VOC (volatile organic compound) testing is a laboratory method used to determine the concentration of volatile organic compounds in air or materials. Its core objective is to assess environmental quality, protect public health, and meet regulatory requirements. In specific test scenarios, the motor speed can be increased to increase the wind speed, accelerate the heating process, and improve test efficiency. When the outer cabin is contaminated, the outer cabin circulation motor can be quickly replaced.

[0017] The pod, serving as the core pollutant simulation area, features a removable design optimized for VOC testing. The pod's interior is constructed of smooth stainless steel and sprayed with a PTFE coating. This ensures efficient heat conduction while effectively preventing pollutant adhesion and corrosion, facilitating subsequent cleaning and maintenance. A sacrificial anode method is employed to prevent corrosion of the pod and equipment. The sacrificial anode method is a technology that protects metal structures from corrosion through electrochemical reactions. The core principle is to use a more reactive metal (such as zinc, aluminum, and magnesium) as the anode, causing it to corrode preferentially. This current transfer then protects the protected metal (such as the hull or storage tank) as the cathode, reducing its corrosion rate.

[0018] See also Figure 4 The chamber is equipped with a temperature and humidity air circulation system. Multiple (preferably five) independent, collaborative air circulation systems are designed to fully meet diverse testing needs. These systems control the chamber's temperature and humidity through independent internal air ducts. The control range still covers a temperature range of -20°C to 80°C and a humidity range of 10% to 80% RH.

[0019] When adjusting the humidity within the intertank, it's difficult to reduce the humidity below 20% using the intertank dehumidification system alone. Therefore, multi-stage dehumidification is employed during low-humidity VOC testing. The in-vehicle air pollutant purification function environmental simulation test system also includes a hollow fiber membrane dehumidification module and an intelligent reagent management unit located within the intertank. The multi-stage dehumidification process includes: 1) a pre-stage physical dehumidification stage: This utilizes a hollow fiber membrane dehumidification module, driven by a pressure differential (0.3-0.5 MPa) to achieve selective moisture permeation, combined with a pre-cooling device to enhance initial dehumidification efficiency; 2) a deep chemical dehumidification stage: This intelligent reagent management unit utilizes a spiral drawer structure to load a composite dehumidifier, such as calcium oxide, phosphorus pentoxide, or color-changing silica gel, for dehumidification. Once the composite dehumidifier reaches the specified humidity, the chemical reagent must be removed promptly to prevent further chemical reactions. After the VOC test is completed, some of the recoverable composite dehumidifier can be placed in the outer cabin, and the waste heat of the outer cabin (temperature 60-80°C) can be used to regenerate the composite dehumidifier, reducing the use of consumables and improving the energy efficiency of the system.

[0020] Temperature and humidity equipment, such as a humidifier, the aforementioned dehumidification system, a refrigerator, and a heating plate, are provided on the temperature and humidity air internal circulation pipeline. When the temperature and humidity in the intertank reach the test conditions, the temperature and humidity equipment are isolated from the internal circulation pipeline by a valve to prevent high-concentration oil smoke and organic matter from corroding the walls and fins of the temperature and humidity equipment, thereby avoiding adverse effects on the refrigeration efficiency and the background environment in the cabin. After the humidity in the intertank stabilizes, there is no water exchange in the intertank and the humidity remains constant at the same temperature. At this time, the temperature and humidity air internal circulation pipeline of the intertank is closed, and the temperature and humidity are maintained stable by heating from the external cabin. This application fits a temperature compensation formula through a large amount of test data to ensure the accuracy and stability of temperature control, which will be specifically introduced in the method embodiment.

[0021] See also Figure 4 The system also includes an exhaust emission device, which needs to be turned on when conducting fuel vehicle tests.

[0022] Figure 5 This is a schematic diagram of the interaction between the device in the cabin and the host computer provided in the embodiment of the present application. Figure 5 The pollutant generation device includes multiple pollutant generators, used to simulate various pollution environments within the chamber. Specifically, the pollutant generation device integrates a variety of advanced pollutant generators, including a particulate matter generator, a dust generator, an organic matter generator (capable of producing common pollutants such as formaldehyde and toluene), a NOx release device, and an NH3 release device. These devices can accurately simulate pollutants in various real-world environments, providing a rich and diverse pollution source for testing.

[0023] Optionally, the system also includes: a pollutant dispersion device, a pollutant concentration detection device and a pollutant purification device. Among them, the pollutant generating device is connected to the pollutant dispersion device through a duct air path, and the pollutant dispersion device includes an air agitation system, a sandwich cabin introduction pipeline and an in-vehicle introduction pipeline; the sandwich cabin introduction pipeline releases pollutants into the sandwich cabin, and the in-vehicle introduction pipeline releases pollutants into the vehicle. Through the coordinated effect of the reasonably designed layout of the sandwich cabin introduction pipeline and the in-vehicle introduction pipeline and the air agitation system, it is ensured that the pollutants are evenly and stably dispersed in the sandwich cabin and in the vehicle, and the invasion and distribution state of pollutants in the vehicle during driving are truly restored. This application provides an effective air flow device based on the actual use scenario of the vehicle.

[0024] The pollutant concentration detection device, located in the chamber, measures the pollutant concentration within the chamber and reports the concentration signal to the host computer. The host computer controls the pollutant generation device, the pollutant purification device, and the pollutant dispersion device based on the pollutant concentration and the test standard (i.e., the test pollutant concentration that should be achieved in the chamber).

[0025] Specifically, the pollutant concentration detection device is equipped with a variety of high-precision detectors, such as those for particulate matter, NOx, and NH3, to monitor pollutant concentrations within the chamber in real time. These high-precision detectors establish an efficient communication link with the host computer, providing immediate feedback on pollutant concentrations. Based on pre-set procedures and pollutant concentrations, the host computer intelligently controls the operating status of the pollutant generator, pollutant purification device, and pollutant dispersion device. For example, it adjusts the operating speed of the pollutant generator and the opening of the pipelines, achieving dynamic and stable control of pollutant concentrations within the chamber and ensuring a consistent and reliable testing environment.

[0026] See also Figure 4 The pollutant purification device includes an internal air circulation purification pipeline and an external air circulation purification pipeline. The internal air circulation purification pipeline located in the interlocking cabin is used to purify the air to the specified working condition through the filter material system. This is because, in the case of interlocking cabin pollution, natural sedimentation is difficult to achieve efficient purification, which seriously affects the test progress and personnel health. This purification pipeline is controlled by an independent valve and equipped with a high-efficiency filter material system. It can quickly start and dynamically purify the air to the specified working condition. The filter material system is designed to be easily disassembled and replaced quickly to ensure that the test continues to be efficient.

[0027] An optional external air recirculation purification line, located within the inter-cabin, discharges pollutants from the inter-cabin into the atmosphere. This external air recirculation purification line connects directly to the outdoors, cleverly bypassing the temperature and humidity control unit, effectively preventing contamination from high concentrations of pollutants. After testing, contaminated gases within the cabin are quickly discharged, and exhaust aftertreatment equipment is provided to ensure safe and environmentally friendly emissions. However, the external recirculation purification capacity is limited and must be coordinated with the internal air recirculation purification line to achieve deep purification of the inter-cabin air.

[0028] To address the differences between the dynamic driving environment of a real vehicle and traditional static testing, a carefully designed air agitation system is incorporated into the test chamber. This system promotes air flow around the vehicle under test, evenly dispersing pollutants and preventing them from settling. It also accelerates the transfer of heat from the external chamber into the test chamber. Optionally, the air agitation system can include multiple fans, such as a front fan and multiple stirring fans. Figure 3 and Figure 4 Four stirring fans and one front fan are shown.

[0029] The stirring fan is located around the cabin wall and is used to promote low-speed air flow, controlling the wind speed around the vehicle within 0.3m / s, ensuring that pollutants are evenly dispersed and effectively preventing sedimentation, while accelerating the transfer of heat from the outer compartment to various parts of the compartment; the front fan is located in front of the vehicle and can adjust the wind speed as needed, ranging from 0 to 35m / s, accurately restoring the aerodynamic environment when the vehicle is in motion.

[0030] Optionally, in order to cope with the pressure change in the sandwich cabin, a balancing air path is specially introduced to connect the sandwich cabin and the outer cabin, and the balancing air path is connected to the air bag to form a balancing air bag (see Figure 1 and Figure 3 ) is used to maintain stable air pressure within the compartment during operation of the air agitation system. The balancing air bag, through its expandable / contractible properties, absorbs or releases gas, thereby regulating the pressure difference between the inside and outside of the system.

[0031] Optionally, the system further includes a vehicle execution structure (not shown) located in the compartment, which is used to operate the vehicle under remote control of the host computer, and the operations include: ignition, air conditioning, and in-vehicle purification.

[0032] Specifically, during the test, given the high concentrations of harmful airborne components, which make direct entry into the vehicle difficult, an advanced robotic arm and high-definition camera system were introduced. The robotic arm is tightly connected to a host computer outside the cabin via a camera, allowing operators to precisely control the robotic arm from outside the cabin to perform key actions such as ignition and air conditioning. Furthermore, a remote audio control system enables remote activation of the vehicle's purification function, significantly improving the convenience and safety of test operations and effectively protecting test personnel from harmful pollutants.

[0033] Optionally, the system also includes a cabin isolation and positive pressure protection system. Vehicles enter and exit the outer cabin and the inter-cabin through a dedicated door. After the test is started, the door is immediately closed to achieve complete isolation between the inter-cabin and the outer cabin. Figure 3 A slightly positive pressure isolation area is set up between the inter-cabin and the outer cabin, and the air pressure difference is used to effectively prevent pollutants in the cabin from leaking to the outer cabin. While ensuring that the air in the outer cabin is not polluted, it ensures that personnel can safely enter and exit the outer cabin, maintaining the closedness and safety of the test environment.

[0034] The present application has achieved significant innovation and breakthroughs in the field of automobile physical and chemical performance testing. The existing technology lacks a systematic testing method for the purification capacity of various particulate matter at the vehicle level, and the vehicle's purification capacity is actually affected by a combination of factors, including the performance of the air conditioning filter, the power of the air conditioning, the rationality of the air duct layout, the quality of the intelligent control strategy, the synergistic effect of other purification devices, and the overall sealing of the vehicle. The environmental simulation test system of the present application can accurately simulate various complex air pollution conditions during vehicle use, and comprehensively and in-depth evaluate the vehicle's purification capacity through actual vehicle testing, effectively filling the gap in the industry. With the help of this system, automobile manufacturers can accurately quantify the purification performance of vehicles in different pollution scenarios, thereby scientifically formulating purification strategies, optimizing the design of vehicle air purification systems, significantly improving the air quality in the car, enhancing product market competitiveness, and promoting technological progress and development in the field of in-car environmental health in the automotive industry.

[0035] Figure 6 This is a flow chart of a method for simulating a vehicle's air pollutant purification function environment provided in an embodiment of the present application. The method, which is executed by a host computer and includes the following operations, is based on the vehicle's air pollutant purification function environment simulation test system provided in the aforementioned embodiment. S110: After placing the vehicle under test in the compartment, adjust the temperature and humidity of the outer compartment to a first specified range through the dual-circulation air duct; and adjust the temperature and humidity of the compartment to a second specified range through the temperature and humidity air internal circulation pipeline.

[0036] The first specified range and the second specified range are determined according to the temperature and humidity range required by the test conditions.

[0037] Optionally, after S110, the method further includes: closing the temperature and humidity air internal circulation pipeline; and adjusting the heating power or cooling power of the outer cabin according to the following formula to achieve constant temperature and humidity in the inter-cabin.

[0038] During the humidity stabilization phase, no water is exchanged within the chamber, and the humidity remains constant at the same temperature. During this phase, the internal temperature and humidity air circulation piping is closed, and the external chamber maintains stable temperature and humidity. The following formula, developed through extensive test data, ensures the accuracy and stability of temperature control.

[0039] P=Q+mc·dt / dT inner ; Q=A·(T inner -T amb ) / R; Where Q is the rate of change of heat in the cabin. A positive Q indicates heat loss and a negative Q indicates heat gain. T inner is the compartment temperature, T ambis the outer cabin temperature, R is the thermal resistance of the cabin wall, A is the heat transfer area, m is the mass of the cabin medium, c is the specific heat capacity, P is the heating power or cooling power, mc·dt / dT inner is the change in heat storage in the cabin when the temperature changes by dt, dt / dT inner is the temperature change rate of the compartment.

[0040] This embodiment maintains the temperature and humidity balance of the inter-chamber through the external chamber, effectively reducing heat and humidity loss in the inter-chamber and saving maintenance costs for the temperature and humidity within the inter-chamber. Furthermore, closing the internal temperature and humidity air circulation piping within the inter-chamber also prevents the impact of internal air circulation on the distribution and concentration of pollutants within the inter-chamber.

[0041] S120. Start the pollutant generating device and the air agitation system.

[0042] S130: Collect pollutant concentrations in the vehicle.

[0043] Dedicated pollutant sensors installed inside the vehicle monitor pollutant concentrations. Because pollutant sensors can be affected by the temperature and humidity inside the vehicle, resulting in inaccurate readings, these readings must be calibrated to obtain reliable pollutant concentration data. Specifically, the readings of the pollutant sensors are collected and adjusted based on the vehicle's temperature and humidity to determine the pollutant concentration inside the vehicle, as shown in the following formula: ; in, is the corrected reading. is the raw reading of the pollutant sensor, It is the correction coefficient under the current temperature and humidity, which can be obtained by calibration.

[0044] S140: Compare the pollutant concentration in the vehicle with the concentration threshold to test the pollutant purification function of the tested vehicle. If the pollutant concentration in the vehicle is greater than the concentration threshold, it indicates that the pollutant purification capacity of the vehicle is insufficient.

[0045] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired connection, such as a coaxial cable, optical fiber, digital subscriber line (DSL), or wireless connection, such as infrared, wireless, or microwave. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device, such as a server or data center, that includes one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, hard disk, or magnetic tape), an optical medium, or a semiconductor medium. It is worth noting that the computer-readable storage medium mentioned in the embodiments of the present application may be a non-volatile storage medium, in other words, a non-transitory storage medium.

[0046] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not a limitation herein.

[0047] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A vehicle air pollutant purification function environment simulation test system, characterized in that: include: The outer cabin, the dual-circulation air duct located in the outer cabin, the inter-cabin, the air agitation system and temperature and humidity air internal circulation pipeline located in the inter-cabin, and the pollutant generating device; The clamping cabin is located inside the outer cabin, and the vehicle to be tested is placed in the clamping cabin; The dual circulation air duct is used to continuously maintain stable temperature and humidity in the cabin through the inner circulation air duct, and to discharge pollutants through the outer circulation air duct when pollution occurs; The pollutant generating device includes generators of various pollutants, which are used to simulate various pollutant environments in the cabin; The air agitation system is used to promote air flow around the vehicle under test, so that pollutants are evenly dispersed to prevent sedimentation, and at the same time accelerate the transfer of heat from the outer cabin to various locations in the inter-cabin; The temperature and humidity air internal circulation pipeline is used to control the temperature and humidity of the compartment through an independent internal circulation air duct.

2. The vehicle interior air pollutant purification function environment simulation test system according to claim 1 is characterized in that: Also includes: The hollow fiber membrane dehumidification module and intelligent reagent management unit are located in the compartment; The hollow fiber membrane dehumidification module is driven by pressure difference to achieve selective moisture permeation; The intelligent reagent management unit is used to perform dehumidification using a composite dehumidifier; The composite dehumidifier is regenerated by utilizing waste heat from the outer cabin.

3. The vehicle interior air pollutant purification function environment simulation test system according to claim 1, characterized in that: Also includes: The balancing gas line between the mezzanine and the outer tank; The balancing air path is connected to the air bag and is used to adjust and maintain the air pressure in the compartment stable during the operation of the air agitation system.

4. The vehicle interior air pollutant purification function environment simulation test system according to claim 1, characterized in that: Also includes: The air internal circulation purification pipeline located in the compartment is used to purify the air to the specified working conditions through the filter system.

5. The vehicle interior air pollutant purification function environment simulation test system according to claim 1, characterized in that: Also includes: The air external circulation purification pipeline located in the sandwich cabin is used to discharge pollutants in the sandwich cabin into the atmosphere.

6. The vehicle interior air pollutant purification function environment simulation test system according to claim 1, characterized in that: Also includes: A pollutant dispersing device connected to the pollutant generating device includes a cabin introduction pipeline and an in-vehicle introduction pipeline; The said compartment introduction pipeline releases pollutants into the compartment, and the vehicle introduction pipeline releases pollutants into the vehicle; The pollutant concentration detection device located in the compartment is used to detect the pollutant concentration in the compartment and report the pollutant concentration to the host computer; The host computer controls the pollutant generating device, the air external circulation purification pipeline and the air internal circulation purification pipeline according to the pollutant concentration and the test standard.

7. The vehicle interior air pollutant purification function environment simulation test system according to any one of claims 1 to 6, characterized in that: Also includes: The vehicle execution structure located in the compartment is used to operate the vehicle under the remote control of the host computer; wherein, the vehicle operation content at least includes: ignition, turning on the air conditioner and turning on the vehicle interior purification function.

8. A method for simulating the test of the air pollutant purification function in a vehicle, characterized in that: The method of applying the vehicle air pollutant purification function environment simulation test system provided by any one of claims 1 to 7, executed by a host computer, includes: After the vehicle under test is placed in the compartment, the temperature and humidity of the outer compartment are adjusted to a first specified range through the dual circulation air duct; the temperature and humidity of the compartment are adjusted to a second specified range through the temperature and humidity air internal circulation pipeline; Start the pollutant generating device and air agitation system; Collect pollutant concentrations inside the vehicle; The pollutant concentration in the vehicle is compared with a concentration threshold value, and the pollutant purification function of the tested vehicle is tested.

9. The environmental simulation test method for the vehicle air pollutant purification function according to claim 8, characterized in that: After adjusting the temperature and humidity of the compartment to a second specified range through the temperature and humidity air internal circulation pipeline, the method further includes: Closing the temperature and humidity air internal circulation pipeline; Adjust the heating power or cooling power of the outer cabin according to the following formula to achieve constant temperature and humidity in the inter-cabin; P=Q+mc·dt / dT inner ; Q=A·(T inner -T amb ) / R; Where Q is the rate of change of heat in the cabin, T inner is the compartment temperature, T amb is the outer cabin temperature, R is the thermal resistance of the cabin wall, A is the heat transfer area, m is the mass of the cabin medium, c is the specific heat capacity, P is the heating power or cooling power, mc·dt / dT inner is the change in heat storage in the cabin when the temperature changes by dt, dt / dT inner is the temperature change rate of the compartment.

10. The environmental simulation test method for the vehicle air pollutant purification function according to claim 8, characterized in that: Collect pollutant concentrations inside the vehicle, including: Collect readings from pollutant sensors inside the vehicle; The readings are adjusted according to the temperature and humidity inside the vehicle to obtain the pollutant concentration inside the vehicle.

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