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

Abstract

The application relates to the technical field of in-vehicle pollution purification test, in particular to an in-vehicle air pollutant purification function environment simulation test system and method. The system comprises: a cabin is located in an outer cabin, and a measured vehicle is arranged in the cabin; a double circulation air duct is used for continuously maintaining the stability of the temperature and humidity in the cabin through an inner circulation air duct and discharging pollutants through an outer circulation air duct when encountering pollution; a pollutant generating device comprises a plurality of pollutant generators and is used for simulating a plurality of pollution environments in the cabin; an air stirring system is used for promoting the flow of air around the measured vehicle, making the pollutants uniformly dispersed to avoid sedimentation, and accelerating the transmission of heat from the outer cabin to each position of the cabin; and a temperature and humidity air inner circulation pipeline is used for realizing the regulation and control of the temperature and humidity of the cabin through the independent inner circulation air duct. The application proposes a method for simulating various air pollution working conditions in a laboratory environment and how to effectively test under such working conditions.

Description

[0001] This application is a divisional application of the invention patent application with application number CN202511225079.2, entitled "An Environmental Simulation Test System and Method for Purifying Air Pollutants in a Vehicle", and the parent application was filed on August 29, 2025. Technical Field

[0002] This application relates to the field of in-vehicle pollution purification testing technology, and more specifically, to an environmental simulation testing system and method for in-vehicle air pollutant purification function. Background Technology

[0003] In-vehicle air quality encompasses much more than just volatile organic compounds (VOCs) such as benzene, aldehydes, and trimethylolpropionic acid released by the vehicle itself. It should also include various components that enter the vehicle from outside air, such as particulate matter, dust, airborne dust, willow catkins, viruses, and pollen. These pollutants all pose a threat to human health, affecting the respiratory, cardiovascular, and immune systems, increasing the risk of illness, and potentially causing eye and skin irritation, leading to various allergic symptoms.

[0004] Current testing of in-vehicle air quality primarily focuses on detecting volatile substances such as benzene, aldehydes, and trimethylolpropionate (BMP) released from interior materials. However, methods for testing pollutants entering the vehicle through the air are relatively scarce. Existing testing methods mainly assess the filtration efficiency at the air conditioning component level, but lack vehicle-wide testing capabilities, which significantly differs from real-world driving scenarios. Therefore, accurately assessing a vehicle's ability to block and purify external pollutants is a pressing issue requiring the establishment of a corresponding testing system.

[0005] Furthermore, the purification efficiency of in-vehicle air purification systems varies significantly across different seasons and temperature / humidity environments. However, neither indoor pollutant testing standards nor current vehicle particulate matter testing standards adequately consider the impact of environmental factors on active filtration effectiveness.

[0006] In view of the above, this application is hereby submitted. Summary of the Invention

[0007] The purpose of this application is to provide an environmental simulation test system and method for in-vehicle air pollutant purification function, so as to propose a test scheme for in-vehicle pollution purification function with whole vehicle level and adjustable environment.

[0008] To achieve the above objectives, this application adopts the following technical solution: Firstly, this application provides an environmental simulation testing system for in-vehicle air pollutant purification function, comprising: The outer chamber has a dual-circulation air duct integrating activated carbon and particulate matter purification devices, and an outer chamber circulation variable frequency motor. The dual-circulation air duct is used to continuously maintain the stable temperature and humidity inside the chamber through the inner circulation air duct, and to discharge pollutants when encountering pollution through the outer circulation air duct. The outer chamber circulation variable frequency motor is used to stabilize the wind speed within 0.3m / s during normal testing. In specific testing scenarios, the motor speed is increased to increase the wind speed, accelerate the heating process, and improve testing efficiency. The test vehicle is placed within the outer chamber, which is located inside the outer chamber. The test chamber includes an air agitation system, a temperature and humidity internal air circulation pipeline, an external air circulation purification pipeline, a hollow fiber membrane dehumidification module, and an intelligent reagent management unit. The air agitation system promotes airflow around the test vehicle, ensuring even dispersion of pollutants and preventing sedimentation, while simultaneously accelerating the transfer of heat from the outer chamber to various locations within the test chamber. The temperature and humidity internal air circulation pipeline regulates the temperature and humidity within the test chamber via an independent internal circulation duct. Once the temperature and humidity within the test chamber reach the required levels, a valve connects the temperature and humidity equipment to the internal air circulation system. The circulation pipeline is isolated. After the humidity in the compartment stabilizes, the internal air circulation pipeline of the compartment is closed, and the temperature and humidity are maintained by heating the outer compartment. The temperature is controlled by fitting a temperature compensation formula based on test data. The external air circulation purification pipeline is used to discharge pollutants in the compartment into the atmosphere, avoiding the temperature and humidity unit. The hollow fiber membrane dehumidification module uses pressure difference to achieve selective moisture permeation and works with a pre-cooling device to improve the initial dehumidification efficiency. The intelligent reagent management unit is used to dehumidify with a composite desiccant and uses waste heat from the outer compartment to regenerate the composite desiccant. A pollutant generating device, comprising generators for generating multiple pollutants, used to simulate multiple polluted environments within a jacketed chamber, including a particulate matter generator, a dust generator, an organic matter generator, a NOx release device, and an NH3 release device; A pollutant dispersion device, connected to the pollutant generating device, includes a compartment inlet pipe and an in-vehicle inlet pipe; the compartment inlet pipe releases pollutants into the compartment, and the in-vehicle inlet pipe releases pollutants into the vehicle. A pollutant concentration detection device, located inside the compartment, is used to detect the pollutant concentration inside the compartment and report the pollutant concentration to the host computer; the host computer controls the pollutant generating device, the external air circulation purification pipeline, and the internal air circulation purification pipeline according to the pollutant concentration and the test standard. The vehicle's execution structure, located inside the compartment, includes a robotic arm and a high-definition camera combination system, as well as a remote audio control system. The robotic arm is connected to an external host computer via the camera, allowing operators to control the robotic arm from outside the compartment using the host computer to complete key vehicle actions. The remote audio control system remotely activates the vehicle's purification function.

[0009] Preferably, the inner wall of the compartment is made of smooth stainless steel and coated with polytetrafluoroethylene, and the compartment and equipment are constructed using the sacrificial anode method.

[0010] Preferably, it further includes: a balancing air passage located between the intercom and the outer compartment; The balancing air path is connected to the air bag and is used to regulate and maintain stable air pressure in the compartment during the operation of the air agitation system.

[0011] Preferably, it further includes: The air recirculation and purification pipeline located in the compartment is used to purify the air to the specified operating conditions through the filter system.

[0012] Preferably, the pollutant concentration detection device includes a particulate matter detector, a NOx detector, and an NH3 detector.

[0013] Preferably, the air agitation system includes a front fan and a stirring fan. The stirring fan is located around the bulkhead and is used to promote low-speed airflow, control the wind speed around the vehicle to within 0.3 m / s, ensure uniform dispersion of pollutants and effectively prevent sedimentation, and accelerate 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 has a wind speed adjustment range of 0 to 35 m / s, used to accurately reproduce the aerodynamic environment under vehicle driving conditions.

[0014] Secondly, this application provides a method for simulating the environmental testing of in-vehicle air pollutant purification function, using an in-vehicle air pollutant purification function environmental simulation testing system. The method is executed by a host computer and includes: After the vehicle under test is placed in the compartment, the temperature and humidity of the outer compartment are adjusted to the first specified range through the dual circulation air duct; the temperature and humidity of the compartment are adjusted to the second specified range through the internal air circulation pipe. Close the temperature and humidity air recirculation pipeline; Adjust the heating or cooling power of the outer cabin according to the following formula to achieve constant temperature and humidity in the inner cabin; P=Q+mc·dt / dT inner ; Q=A·(T inner -T amb ) / R; Where Q is the rate of change of heat within the jacket, and T inner It is the temperature of the jacket compartment, T amb The outer compartment temperature is given by R, the thermal resistance of the interlayer wall is given by A, the heat transfer area is given by m, the mass of the interlayer medium is given by c, the specific heat capacity is given by P, and the heating or cooling power is given by mc·dt / dT. inner The change in heat storage in the inner cabin when the temperature changes by dt, dt / dT inner The temperature change rate of the jacket; Start the pollutant generator and air agitation system; Collect the concentration of pollutants inside the vehicle; The pollutant concentration inside the vehicle is compared with the concentration threshold to test the pollutant purification function of the vehicle under test.

[0015] Preferably, the concentration of pollutants inside the vehicle is collected, including: Collect readings from the pollutant sensors inside the vehicle; The concentration of pollutants inside the vehicle is obtained by adjusting the readings based on the temperature and humidity inside the vehicle.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This application represents a significant innovation and breakthrough in the field of automotive physicochemical performance testing. It proposes methods for simulating various air pollution conditions in a laboratory environment and for conducting effective testing under these conditions. Currently, the industry lacks systematic testing methods for the purification capabilities of vehicles with multiple particulate matter. However, a vehicle's purification capacity is actually influenced by a combination of factors, including the performance of the air conditioning filter, the power of the air conditioning system, the rationality of the air duct layout, the quality of intelligent control strategies, the synergistic effect of other purification devices, and the overall sealing of the vehicle. This application's environmental simulation testing system can accurately simulate various complex air pollution conditions during vehicle use. Through real-vehicle testing, it comprehensively and thoroughly evaluates the vehicle's purification capabilities, effectively filling a gap in the industry. With this system, automotive manufacturers can accurately quantify the purification performance of vehicles under different pollution scenarios, thereby scientifically formulating purification strategies, optimizing the design of vehicle air purification systems, significantly improving in-vehicle air quality, enhancing product market competitiveness, and promoting technological progress and development in the field of in-vehicle environmental health within the automotive industry. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front view of an in-vehicle air pollutant purification function environmental simulation test system provided in an embodiment of this application; Figure 2 This is a side view of an environmental simulation test system for in-vehicle air pollutant purification function provided in an embodiment of this application; Figure 3 This is a top view of an in-vehicle air pollutant purification function environmental simulation test system provided in an embodiment of this application; Figure 4 This is a schematic diagram of a compartment provided in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the interaction between the device inside the clamping compartment and the host computer provided in the embodiments of this application; Figure 6 This is a flowchart of an environmental simulation test method for the purification function of in-vehicle air pollutants provided in an embodiment of this application. Detailed Implementation

[0019] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0020] Figure 1 This is a front view of an environmental simulation test system for in-vehicle air pollutant purification function provided in an embodiment of this application. Figure 2 This is a side view of an environmental simulation test system for in-vehicle air pollutant purification function provided in an embodiment of this application. Figure 3 This is a top view of an environmental simulation test system for in-vehicle air pollutant purification function provided in an embodiment of this application. Figure 4 This is a schematic diagram of a compartment provided in an embodiment of this application.

[0021] See Figures 1-4 The system provided in this application includes an outer compartment, a dual-circulation air duct (not shown) located within the outer compartment, a clamping compartment, an air agitation system and a temperature and humidity internal air circulation pipeline located within the clamping compartment, and a pollutant generating device; the clamping compartment is located within the outer compartment, and the vehicle under test is placed within the clamping compartment. See also Figure 1 and Figure 2 The vehicle enters the outer compartment from the inner compartment, and then passes through the inner compartment door to enter the inner compartment.

[0022] Each component is described in detail below.

[0023] The outer chamber boasts a wide range of temperature and humidity control capabilities, with precise temperature adjustment between -20℃ and 80℃ and stable humidity control between 20% RH and 80% RH, effectively simulating different seasons and complex working conditions. The outer chamber's air ducts integrate activated carbon and particulate matter purification devices, constructing a dual-circulation air duct system. The internal circulation duct continuously maintains stable temperature and humidity within the chamber, while the external circulation duct removes pollutants in case of contamination, ensuring clean air and preventing pollution spread. The outer chamber's circulation motor utilizes advanced variable frequency technology to precisely control the airflow speed, stabilizing it below 0.3 m / s during routine testing, meeting stringent requirements such as VOC testing. VOC (volatile organic compound) testing is an experimental method for detecting the content of volatile organic compounds in air or materials, with the core objective of assessing environmental quality, protecting public health, and meeting regulatory requirements. In specific testing scenarios, the motor speed can be increased to increase the wind speed, accelerate the heating process, and improve testing efficiency. If the outer chamber is contaminated, the outer chamber circulation motor can be quickly replaced.

[0024] The compartment, serving as the core area for pollutant simulation, features a detachable design optimized for VOC testing. The inner walls of the compartment are made of smooth stainless steel coated with PTFE, ensuring efficient heat conduction while effectively preventing pollutant adhesion and corrosion, facilitating subsequent cleaning and maintenance. It also employs a sacrificial anode method to prevent corrosion of the compartment and equipment. The sacrificial anode method is a technique that protects metal structures from corrosion through an electrochemical reaction. Its core principle is to use a more reactive metal (such as zinc, aluminum, or magnesium) as the anode, causing it to corrode preferentially. This allows the protected metal (such as a ship's hull or storage tank) to act as the cathode through current transfer, reducing its corrosion rate.

[0025] See Figure 4 The chamber is equipped with a temperature and humidity internal air circulation system, featuring multiple (preferably five) independent and coordinated air circulation systems to fully meet diverse testing needs. This system regulates the temperature and humidity of the chamber through independent internal air circulation ducts. The control range covers a temperature range of -20℃ to 80℃ and a humidity range of 10% RH to 80% RH.

[0026] Optionally, when adjusting the humidity inside the compartment, it is difficult to reduce the humidity to below 20% using only the dehumidification system within the compartment. Therefore, multi-stage dehumidification is employed during low-humidity VOC testing. The in-vehicle air pollutant purification environmental simulation testing system also includes a hollow fiber membrane dehumidification module and an intelligent reagent management unit located within the compartment. Multi-stage dehumidification includes: 1) a pre-physical dehumidification stage: using a hollow fiber membrane dehumidification module, driven by pressure difference (0.3-0.5MPa) to achieve selective moisture penetration, combined with a pre-cooling device to improve initial dehumidification efficiency; 2) a deep chemical dehumidification stage: using the intelligent reagent management unit, a spiral drawer structure is used to load composite dehumidifiers, such as calcium oxide, phosphorus pentoxide, and color-changing silica gel, for dehumidification. Once the composite dehumidifier reaches the specified humidity, the chemical reagent needs to be removed promptly to avoid other chemical reactions. After the VOC test is completed, some of the recoverable composite desiccant can be placed in the outer chamber. The waste heat of the outer chamber (temperature 60-80℃) can be used to regenerate the composite desiccant, reduce the amount of consumables used, and improve the system's energy efficiency.

[0027] Temperature and humidity control devices, such as humidifiers, the aforementioned dehumidification system, refrigerators, and heating elements, are installed in the internal air circulation pipeline. Once the temperature and humidity within the compartment reach the test conditions, valves isolate the temperature and humidity control devices from the internal circulation pipeline to prevent high-concentration oil fumes and organic matter from corroding the walls and fins of the devices, thus avoiding adverse effects on cooling efficiency and the internal environment. After the humidity within the compartment stabilizes, there is no water exchange, and the humidity remains constant at the same temperature. At this point, the internal air circulation pipeline of the compartment is closed, and the temperature and humidity are maintained by heating from the external chamber. This application uses extensive test data to fit a temperature compensation formula to ensure the accuracy and stability of temperature control, which will be specifically described in the method embodiments.

[0028] See Figure 4 The system also includes an exhaust emission device, which needs to be activated when testing fuel-powered vehicles.

[0029] Figure 5 This is a schematic diagram illustrating the interaction between the device inside the clamping compartment and the host computer, as provided in an embodiment of this application. See also... Figure 5 The pollutant generation device includes multiple pollutant generators to simulate various pollutant environments within the chamber. Specifically, the device integrates several 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. This allows for accurate simulation of pollutants in various real-world environments, providing a rich and diverse range of pollution sources for testing.

[0030] Optionally, the system also includes: a pollutant dispersion device, a pollutant concentration detection device, and a pollutant purification device. The pollutant generating device is connected to the pollutant dispersion device via a duct gas path. The pollutant dispersion device includes an air agitation system, a compartment inlet pipe, and an in-vehicle inlet pipe. The compartment inlet pipe releases pollutants into the compartment, and the in-vehicle inlet pipe releases pollutants into the vehicle interior. Through the rationally designed layout of the compartment and in-vehicle inlet pipes and their synergistic effect with the air agitation system, pollutants are ensured to be uniformly and stably dispersed within the compartment and inside the vehicle, realistically replicating the intrusion and distribution of pollutants during vehicle operation. This application provides an effective airflow device based on actual vehicle usage scenarios.

[0031] The pollutant concentration detection device is located inside the clamping chamber and is used to detect the pollutant concentration within the chamber, reporting the pollutant concentration signal to the host computer. The host computer, based on the pollutant concentration and the test standard (i.e., the test pollutant concentration that should be achieved within the clamping chamber), controls the pollutant generating device, the pollutant purification device, and the pollutant dispersion device.

[0032] Specifically, the pollutant concentration detection device is equipped with multiple high-precision detectors, such as those for particulate matter, NOx, and NH3, which can monitor the pollutant concentration in the chamber in real time. These high-precision detectors establish an efficient communication link with the host computer, providing immediate feedback on the pollutant concentration. Based on preset programs and the pollutant concentration, 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 rate of the pollutant generator and the opening of the pipelines to achieve dynamic and stable control of the pollutant concentration in the chamber, ensuring the consistency and reliability of the testing environment.

[0033] See Figure 4 The pollutant purification device includes internal air circulation purification piping and external air circulation purification piping. The internal air circulation purification piping, located within the compartment, is used to purify the air to the designated operating conditions through a filter system. This is because, in the case of contamination within the compartment, natural settling is insufficient for efficient purification, severely impacting test progress and personnel health. This purification piping, controlled by an independent valve and equipped with a high-efficiency filter system, can quickly start and dynamically purify the air to the designated operating conditions. Furthermore, the filter system is designed for easy disassembly and replacement, ensuring continuous and efficient testing.

[0034] Optionally, an external air circulation purification duct located within the compartment is used to discharge pollutants from the compartment into the atmosphere. This external air circulation purification duct is directly connected to the outdoors, cleverly avoiding the temperature and humidity control unit and effectively preventing high-concentration pollutants from contaminating the unit. After testing, the polluted gas inside the compartment can be quickly discharged, and an exhaust gas after-treatment device is provided to ensure safe and environmentally friendly emissions. However, the external circulation purification capacity is limited and needs to work in conjunction with the internal air circulation purification duct within the compartment to achieve deep purification of the air inside the compartment.

[0035] To address the differences between the actual dynamic driving environment of a vehicle and traditional static testing, an air agitation system is carefully designed within the test chamber. This system promotes airflow around the vehicle under test, ensuring even dispersion of pollutants and preventing sedimentation. Simultaneously, it accelerates the transfer of heat from the external chamber to various locations within the chamber. Optionally, the air agitation system may include multiple fans, such as a front-mounted fan and multiple agitating fans. Figure 3 and Figure 4 Four mixing fans and one front fan are shown.

[0036] The mixing fan is located around the bulkhead to promote low-speed airflow and control the wind speed around the vehicle to 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 at the front of the vehicle and can adjust the wind speed as needed, ranging from 0 to 35m / s, accurately replicating the aerodynamic environment when the vehicle is in motion.

[0037] Optionally, to address pressure changes within the compartment, a balancing air path is introduced to connect the compartment and the outer compartment. This balancing air path is connected to an air bag to form a balancing air bag (see...). Figure 1 and Figure 3 This is used to regulate and maintain stable air pressure within the jacket during the operation of an air agitation system. The balancing air bag, through its expandable / contractable properties, can absorb or release gas, thereby regulating the pressure difference between the inside and outside of the system.

[0038] Optionally, the system also includes a vehicle actuator (not shown) located in the compartment for operating the vehicle under remote control of a host computer. The operations include ignition, turning on the air conditioning, and activating the in-vehicle air purification function.

[0039] Specifically, during testing, given the complexity and high concentration of harmful components in the air, making it difficult for personnel to directly enter the vehicle for operation, an advanced robotic arm combined with a high-definition camera system was introduced. The robotic arm is tightly connected to an external host computer via the camera, allowing operators to precisely control the robotic arm from outside the cabin to perform key actions such as vehicle ignition and air conditioning operation. Simultaneously, a remote voice control system is provided to remotely activate the vehicle's purification function, greatly improving the convenience and safety of testing operations and effectively protecting test personnel from harmful pollutants.

[0040] Optionally, the system also includes a compartment isolation and positive pressure protection system. The vehicle enters and exits the outer compartment and the intercom through a dedicated door; the door closes immediately upon start of the test, achieving complete isolation between the intercom and the outer compartment. See also Figure 3 A slightly positive pressure isolation zone is set up between the inner and outer chambers. The pressure difference effectively prevents pollutants inside the inner chamber from leaking into the outer chamber. This ensures that the air in the outer chamber is not contaminated, while also ensuring that personnel can safely enter and exit the outer chamber, maintaining the closed and safe testing environment.

[0041] This application represents a significant innovation and breakthrough in the field of automotive physicochemical performance testing. Existing technologies lack systematic testing methods for the purification capabilities of vehicles at the whole-vehicle level, while a vehicle's purification capacity is actually influenced by a combination of factors, including the performance of the air conditioning filter, the power of the air conditioning system, the rationality of the air duct layout, the quality of intelligent control strategies, the synergistic effect of other purification devices, and the overall sealing of the vehicle. The environmental simulation testing system of this application can accurately simulate various complex air pollution conditions during vehicle use, comprehensively and deeply evaluating the vehicle's purification capabilities through real-vehicle testing, effectively filling a gap in the industry. With this system, automotive manufacturers can accurately quantify the purification performance of vehicles under different pollution scenarios, thereby scientifically formulating purification strategies, optimizing the design of vehicle air purification systems, significantly improving in-vehicle air quality, enhancing product market competitiveness, and promoting technological progress and development in the field of in-vehicle environmental health within the automotive industry.

[0042] Figure 6 This is a flowchart of an environmental simulation test method for in-vehicle air pollutant purification function provided in an embodiment of this application. Using the in-vehicle air pollutant purification function environmental simulation test system provided in the foregoing embodiment, this method is executed by a host computer and includes the following operations: S110. After placing the vehicle under test in the compartment, adjust the temperature and humidity of the outer compartment to the first specified range through the dual circulation air duct; adjust the temperature and humidity of the compartment to the second specified range through the internal air circulation pipe.

[0043] The first specified range and the second specified range are determined based on the temperature and humidity range required for the test conditions.

[0044] Optionally, after S110, the following may also be included: closing the internal air circulation pipeline for temperature and humidity; adjusting the heating or cooling power of the outer cabin according to the following formula to achieve constant temperature and humidity in the inner cabin.

[0045] During the humidity stabilization phase, there is no water exchange within the jacket, and the humidity remains constant at the same temperature. At this time, the internal air circulation pipes for temperature and humidity are closed, and the external chamber is used to maintain stable temperature and humidity. The following formula was derived by fitting a large amount of test data to ensure the accuracy and stability of temperature control.

[0046] P=Q+mc·dt / dT inner ; Q=A·(T inner -T amb ) / R; Where Q is the rate of change of heat within the jacket, and T inner It is the temperature of the jacket compartment, T amb The outer compartment temperature is given by R, the thermal resistance of the interlayer wall is given by A, the heat transfer area is given by m, the mass of the interlayer medium is given by c, the specific heat capacity is given by P, and the heating or cooling power is given by mc·dt / dT.inner The change in heat storage in the inner cabin when the temperature changes by dt, dt / dT inner The temperature change rate of the jacket compartment.

[0047] This embodiment maintains the temperature and humidity balance of the intercom compartment through the outer compartment, which can effectively reduce heat and humidity loss in the intercom compartment and save on maintenance costs for temperature and humidity control within the intercom compartment. Moreover, closing the internal air circulation pipes for temperature and humidity control within the intercom compartment can also prevent the internal air circulation from affecting the distribution and concentration of pollutants within the intercom compartment.

[0048] S120, Start the pollutant generator and air agitation system.

[0049] S130, collecting pollutant concentration inside the vehicle.

[0050] The concentration of pollutants inside the vehicle is detected using dedicated pollutant sensors installed within the vehicle. Because the sensor readings may be inaccurate due to variations in temperature and humidity inside the vehicle, calibration is required to obtain accurate and reliable pollutant concentration data. Specifically, the readings of the pollutant sensors inside the vehicle are collected; based on the temperature and humidity inside the vehicle, the readings are adjusted to obtain the pollutant concentration inside the vehicle, as shown in the following formula: C 实际浓度 =C 测试浓度 ×τ; Among them, C 实际浓度 This is the calibrated reading, C 测试浓度 It is the raw reading of the pollutant sensor, and τ is the correction coefficient under the current temperature and humidity, which can be calibrated.

[0051] S140. Compare the pollutant concentration inside the vehicle with a concentration threshold to test the pollutant purification function of the vehicle under test. If the pollutant concentration inside the vehicle is greater than the concentration threshold, it indicates that the pollutant purification capacity inside the vehicle is insufficient.

[0052] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as 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 this 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 wired means, such as coaxial cable, optical fiber, digital subscriber line (DSL), or wireless means, such as infrared, wireless, microwave, etc. The computer-readable storage medium can be any available medium that a computer can access, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium, or a semiconductor medium, etc. It is worth noting that the computer-readable storage medium mentioned in the embodiments of this application can be a non-volatile storage medium, in other words, it can be a non-transient storage medium.

[0053] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0054] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An environmental simulation testing system for in-vehicle air pollutant purification function, characterized in that, include: The outer chamber has a dual-circulation air duct integrating activated carbon and particulate matter purification devices, and an outer chamber circulation variable frequency motor. The dual-circulation air duct is used to continuously maintain the stable temperature and humidity inside the chamber through the inner circulation air duct, and to discharge pollutants when encountering pollution through the outer circulation air duct. The outer chamber circulation variable frequency motor is used to stabilize the wind speed within 0.3m / s during normal testing. In specific testing scenarios, the motor speed is increased to increase the wind speed, accelerate the heating process, and improve testing efficiency. The test vehicle is placed within the outer chamber, which is located inside the outer chamber. The test chamber includes an air agitation system, a temperature and humidity internal air circulation pipeline, an external air circulation purification pipeline, a hollow fiber membrane dehumidification module, and an intelligent reagent management unit. The air agitation system promotes airflow around the test vehicle, ensuring even dispersion of pollutants and preventing sedimentation, while simultaneously accelerating the transfer of heat from the outer chamber to various locations within the test chamber. The temperature and humidity internal air circulation pipeline regulates the temperature and humidity within the test chamber via an independent internal circulation duct. Once the temperature and humidity within the test chamber reach the required levels, a valve connects the temperature and humidity equipment to the internal air circulation system. The circulation pipeline is isolated. After the humidity in the compartment stabilizes, the internal air circulation pipeline of the compartment is closed, and the temperature and humidity are maintained by heating the outer compartment. The temperature is controlled by fitting a temperature compensation formula based on test data. The external air circulation purification pipeline is used to discharge pollutants in the compartment into the atmosphere, avoiding the temperature and humidity unit. The hollow fiber membrane dehumidification module uses pressure difference to achieve selective moisture permeation and works with a pre-cooling device to improve the initial dehumidification efficiency. The intelligent reagent management unit is used to dehumidify with a composite desiccant and uses waste heat from the outer compartment to regenerate the composite desiccant. A pollutant generating device, comprising generators for generating multiple pollutants, used to simulate multiple polluted environments within a jacketed chamber, including a particulate matter generator, a dust generator, an organic matter generator, a NOx release device, and an NH3 release device; A pollutant dispersion device, connected to the pollutant generating device, includes a compartment inlet pipe and an in-vehicle inlet pipe; The compartment inlet pipe releases pollutants into the compartment, and the in-vehicle inlet pipe releases pollutants into the vehicle. A pollutant concentration detection device, located inside the compartment, is used to detect the pollutant concentration inside the compartment and report the pollutant concentration to the host computer; the host computer controls the pollutant generating device, the external air circulation purification pipeline, and the internal air circulation purification pipeline according to the pollutant concentration and the test standard. The vehicle's execution structure, located inside the compartment, includes a robotic arm and a high-definition camera combination system, as well as a remote audio control system. The robotic arm is connected to an external host computer via the camera, allowing operators to control the robotic arm from outside the compartment using the host computer to complete key vehicle actions. The remote audio control system remotely activates the vehicle's purification function.

2. The in-vehicle air pollutant purification function environmental simulation test system according to claim 1, characterized in that, The inner wall of the compartment is made of smooth stainless steel and coated with polytetrafluoroethylene, and the compartment and equipment are made using the sacrificial anode method.

3. The in-vehicle air pollutant purification function environmental simulation test system according to claim 1, characterized in that, Also includes: The balancing air passage located between the intercom and the outer compartment; The balancing air path is connected to the air bag and is used to regulate and maintain stable air pressure in the compartment during the operation of the air agitation system.

4. The in-vehicle air pollutant purification function environmental simulation test system according to claim 1, characterized in that, Also includes: The air recirculation and purification pipeline located in the compartment is used to purify the air to the specified operating conditions through the filter system.

5. The in-vehicle air pollutant purification function environmental simulation test system according to claim 1, characterized in that, The pollutant concentration detection device includes a particulate matter detector, a NOx detector, and an NH3 detector.

6. The in-vehicle air pollutant purification function environmental simulation test system according to claim 1, characterized in that, The air agitation system includes a front fan and a stirring fan. The stirring fan is located around the bulkhead and is used to promote low-speed airflow, keeping the wind speed around the vehicle below 0.3 m / 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 has a wind speed adjustment range of 0 to 35 m / s, used to accurately reproduce the aerodynamic environment under vehicle driving conditions.

7. A method for simulating environmental testing of in-vehicle air pollutant purification function, characterized in that, The method of using the in-vehicle air pollutant purification function environmental simulation test system provided by any one of claims 1-6, wherein the method is 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 the first specified range through the dual circulation air duct; the temperature and humidity of the compartment are adjusted to the second specified range through the internal air circulation pipe. Close the temperature and humidity air recirculation pipeline; Adjust the heating or cooling power of the outer cabin according to the following formula to achieve constant temperature and humidity in the inner cabin; P=Q+mc·dt / dT inner ; Q=A·(T inner -T amb ) / R; Where Q is the rate of change of heat within the jacket, and T inner It is the temperature of the jacket compartment, T amb The outer compartment temperature is given by R, the thermal resistance of the interlayer wall is given by A, the heat transfer area is given by m, the mass of the interlayer medium is given by c, the specific heat capacity is given by P, and the heating or cooling power is given by mc·dt / dT. inner The change in heat storage in the inner cabin when the temperature changes by dt, dt / dT inner The temperature change rate of the jacket; Start the pollutant generator and air agitation system; Collect the concentration of pollutants inside the vehicle; The pollutant concentration inside the vehicle is compared with the concentration threshold to test the pollutant purification function of the vehicle under test.

8. The method for simulating the environmental testing of in-vehicle air pollutant purification function according to claim 7, characterized in that, The concentration of pollutants inside the vehicle was collected, including: Collect readings from the pollutant sensors inside the vehicle; The concentration of pollutants inside the vehicle is obtained by adjusting the readings based on the temperature and humidity inside the vehicle.

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