A VOC dynamic release test system for automotive interior parts

Abstract

The invention discloses a VOC dynamic release test system for automobile interior parts, which relates to the field of VOC testing technology and includes a test chamber, an air path cleaning module, an environmental control unit, an analysis sampling unit and a risk assessment unit. The invention simulates the use of automobile interior parts in different environments through the environmental control unit, so that the test results are closer to the actual situation. The multi-point sampling of the analysis sampling unit can more comprehensively reflect the distribution of VOC in the test chamber, analyze the types of VOC in the collected air samples, determine the known carcinogens, and further accurately determine their contents. At the same time, unknown VOC components are screened and identified to discover potential new carcinogens and unknown compounds with potential carcinogenic risks, prevent the occurrence of unknown carcinogens from affecting the accuracy of the test results, obtain the exposure concentration of carcinogens, calculate the human carcinogenic risk value under different exposure concentrations, and conduct risk level assessment.

Description

Technical Field

[0001] The invention relates to the technical field of VOC testing, in particular to a VOC dynamic release testing system for automobile interior decoration parts. Background Art

[0002] Volatile organic compounds (VOCs) released from automotive interior materials have become the main source of air quality pollution in the car. Organic substances such as benzene, toluene, and formaldehyde contained in VOCs evaporate and exist in the air. Their toxicity, irritation, carcinogenicity, and special odor can affect the skin and mucous membranes and cause harm to the human body. It is necessary to test the VOCs in interior parts.

[0003] For example, the method of "A qualitative and quantitative method for VOC of automobile interior materials" with publication number: CN109696497B is as follows: S01 takes automobile interior parts, makes them into 100mm×100mm samples, and puts them into 10L Telar air bags. After placing them in an oven at 65±2℃ for 3-6 hours, collect the gas; S02 transports the gas collected in S01 to a sample box, which contains core-shell compounds and allows them to stand for 4-7 hours; S03 places the core-shell compounds in the sample box in a 2,4-dinitrophenylhydrazine solution to react and generate a precipitate; S04 collects the precipitate in S03, and reverses it, while collecting gas for GC-O-MS testing.

[0004] In the prior art, when conducting VOC dynamic release tests on automotive interior parts, due to the influence of multiple carcinogenic VOCs during the testing process of automotive interior parts, not only do they contain known carcinogens, but reactions between different components of the interior parts under different usage environments will also produce some unknown carcinogens. It is impossible to combine known carcinogens with unknown carcinogens, which affects the exposure of the automotive interior parts in the usage environment and the carcinogenic risk assessment results, resulting in assessment errors. Summary of the invention

[0005] The purpose of the present invention is to provide a VOC dynamic release test system for automobile interior parts to solve the problem raised in the above background technology that the presence of multiple carcinogenic VOCs during the automobile interior parts testing process will affect the exposure of the automobile interior parts in the use environment and the carcinogenic risk assessment results. The present invention analyzes the types of VOCs in the collected air samples, determines the known carcinogens, and further accurately determines their contents. At the same time, it screens and identifies unknown VOC components to discover potential new carcinogens and unknown compounds with potential carcinogenic risks, thereby preventing the occurrence of unknown carcinogens from affecting the accuracy of the test results.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a VOC dynamic release test system for automotive interior parts, comprising a test chamber, an air path cleaning module, an environmental control unit, an analysis sampling unit and a risk assessment unit;

[0007] The test chamber is used to place the automotive interior parts samples to be tested;

[0008] The gas path cleaning module is used to introduce pure air into the gas path to preheat and clean the test chamber, reduce the background concentration to a normal range, and circulate pure air in the gas path at a specific flow rate and flow rate. First, the test chamber is preheated, so that the temperature in the test chamber can gradually rise to a temperature range close to that required for the actual test, thereby avoiding the impact of sudden temperature changes on the interior decoration samples and stabilizing the test environment. At the same time, the pure air fully cleans the test chamber, bringing out impurities, residual VOCs and other pollutants that may have existed in the chamber, thereby ensuring the purity of the chamber environment at the beginning of the test, and providing good starting conditions for the subsequent accurate measurement of the VOC release of the interior decoration parts;

[0009] The environmental control unit is used to collect temperature, humidity and air flow data inside the test chamber, simulate actual environmental temperature conditions, and control the temperature, humidity and air flow inside the test chamber;

[0010] The analysis sampling unit is used to obtain air samples inside the test chamber and perform data analysis on the samples;

[0011] The risk assessment unit is used to identify potential carcinogens in the detected VOC components, assess individual exposure risks, and make risk management decisions based on the risk assessment results;

[0012] The risk assessment unit includes a hazardous substance identification module, an exposure assessment module and a dose-response relationship assessment module;

[0013] The harmful substance identification module is used to perform a detailed component analysis on the VOC obtained through sampling and analysis to determine the carcinogens inside;

[0014] The exposure assessment module is used to control the environmental control unit to simulate different exposure scenarios and obtain the exposure concentration of carcinogenic VOCs;

[0015] The dose-response relationship assessment module is used to understand the carcinogenic effects and related mechanisms of different doses of carcinogenic VOCs on organisms, establish a dose-response relationship model, calculate the human carcinogenic risk value at different exposure concentrations, and conduct risk level assessment based on the risk value calculation results.

[0016] Preferably, the environmental control unit includes a temperature control module, a humidity control module and a flow control module;

[0017] The temperature control module is used to control the temperature change of the test chamber to simulate different temperature environments in the car under different climatic conditions and usage scenarios;

[0018] The humidity control module is used to control the humidity changes inside the test chamber, simulating different humidity environments affected by factors such as region, weather and usage habits;

[0019] The flow control module is used to adjust the air flow inside the test cabin to simulate different ventilation conditions, including breeze, normal driving ventilation and strong ventilation.

[0020] Preferably, the analysis and sampling unit includes an air sampling module and a sample analysis module;

[0021] The air sampling module is used to use multi-point sampling, set sampling points at different positions and heights inside the test cabin, regularly collect multiple groups of samples, consider the characteristics of air flow in the test cabin and the existing concentration gradient, ensure that air samples in different areas of the cabin can be fully collected, minimize sampling errors, and fully reflect the true distribution of VOCs in the test cabin;

[0022] The sample analysis module is used to analyze the collected air samples and determine the contents of various VOCs therein.

[0023] Preferably, the internal carcinogens include known carcinogens and unknown carcinogens. After determining that the automobile interior contains known carcinogens, their content is accurately measured. For some unknown VOC components, high-resolution mass spectrometry is used for screening and identification to discover potential new carcinogens and unknown compounds with potential carcinogenic risks. This comprehensive harmful substance identification capability can timely discover various carcinogenic hazards that may exist in automobile interior parts, providing an accurate material basis for subsequent risk assessment.

[0024] Preferably, obtaining the exposure concentration of carcinogenic VOCs includes simulating different temperature, humidity and ventilation conditions, the release of VOCs from interior parts, and the exposure time and frequency of drivers and passengers in the vehicle, combining the VOC concentration data obtained by sampling and analysis and the exposure scenario simulation results to obtain the exposure concentration of drivers and passengers to various carcinogenic VOCs in different scenarios, providing basic data for subsequent risk assessment.

[0025] Preferably, the human carcinogenic risk value calculation formula is as follows:

[0026]

[0027] B sa =L×P f ;

[0028] Among them, L represents the chronic intake of harmful substances, A i Indicates the concentration of harmful substances in the air, C d Indicates the exposure period, C f represents the exposure frequency, C t represents exposure time, B represents respiration rate, H x represents life expectancy, I represents body mass, P f Indicates the carcinogenic factor of a carcinogen.

[0029] Preferably, the risk level includes five levels: very low, low, medium, high and very high, and the risk value is less than 1×10 -7 When the risk is very low, it is classified as a very low risk level, with a potential threat to human health of very low, and the risk value is 1×10 -7 -1×10 -6 It is classified as a low risk level. The risk of cancer caused by exposure to carcinogenic VOCs is low and needs to be paid attention to. The risk value is 1×10 -6 -1×10 -4 It is classified as medium risk level, with obvious health risks, and the risk value is 1×10 -4 -1×10 -3 When the risk value is higher than 1×10 -3 When it is detected, it is classified as an extremely high risk level, and the risk of cancer in the human body is high.

[0030] Preferably, the risk assessment unit further includes a risk characterization module and a risk management and control module;

[0031] The risk characterization module is used to evaluate the carcinogenic risk of individual drivers and passengers based on the evaluation results of the exposure evaluation module and the dose-response relationship evaluation module, according to individual sensitivity, age, gender and health status. Since different individuals have different sensitivities to carcinogens, these individual factors are combined to conduct a personalized evaluation of the carcinogenic risk of each driver and passenger, so that the risk evaluation results are closer to the actual situation, providing a more accurate basis for formulating targeted risk control measures;

[0032] The risk management module is used to evaluate the accuracy, reliability and representativeness of the data obtained during the sampling and analysis process, analyze the impact of sampling errors, limitations of analytical methods and instrument accuracy on the data, and quantify the impact of these factors on the data by repeating experiments, comparing the results of different analytical methods and regularly calibrating instruments, etc., to eliminate the impact of model uncertainty on risk assessment results, and propose risk control measures and suggestions based on the results of carcinogenic risk assessment.

[0033] Preferably, the risk control measures and suggestions include improving the materials of interior trim parts, optimizing the injection molding production process, strengthening the cleaning measures of production equipment, optimizing the ventilation system of the car, and updating the VOC emission standards of different types of interior trim parts.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention simulates the use of automobile interior decoration parts in different environments through the environmental control unit, so that the test results are closer to the actual situation and the accuracy of the test is guaranteed. The multi-point sampling of the analysis sampling unit can more comprehensively reflect the distribution of VOCs in the test cabin, analyze the types of VOCs in the collected air samples, and after determining the known carcinogens, further accurately determine their contents. At the same time, screening and identification of unknown VOC components can be carried out, so as to discover potential new carcinogens and unknown compounds with potential carcinogenic risks, prevent the occurrence of unknown carcinogens from affecting the accuracy of the test results, obtain the exposure concentration of the carcinogens, and further calculate the human carcinogenic risk values ​​under different exposure concentrations, so as to conduct risk level assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a system block diagram of a VOC dynamic release test system for automotive interior parts of the present invention;

[0037] Figure 2 This is a block diagram of an environmental control unit of a VOC dynamic release test system for automotive interior parts of the present invention;

[0038] Figure 3 This is a block diagram of a sampling and analysis unit of a VOC dynamic release test system for automotive interior parts of the present invention;

[0039] Figure 4 The present invention is a risk assessment unit block diagram of a VOC dynamic release test system for automotive interior parts.

[0040] In the figure:

[0041] 1. Test chamber; 2. Air path cleaning module; 3. Environmental control unit; 31. Temperature control module; 32. Humidity control module; 33. Flow control module; 4. Analysis and sampling unit; 41. Air sampling module; 42. Sample analysis module; 5. Risk assessment unit; 51. Hazardous substance identification module; 52. Exposure assessment module; 53. Dose-response relationship assessment module; 54. Risk characterization module; 55. Risk management and control module. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example: Refer to Figure 1 - Figure 4 As shown: A VOC dynamic release test system for automotive interior parts, including a test chamber 1, an air path cleaning module 2, an environmental control unit 3, an analysis sampling unit 4 and a risk assessment unit 5;

[0044] The test chamber 1 is used to place the automotive interior samples to be tested. The test chamber 1 is made of inert materials to ensure that the chamber itself will not adsorb or otherwise chemically react with the VOCs released by the interior parts during the test, thereby ensuring the accuracy and reliability of the test results. Its internal space can accommodate automotive interior samples of different shapes and sizes, providing a stable environmental foundation for subsequent testing work;

[0045] The gas circuit cleaning module 2 is used to introduce pure air into the gas circuit to preheat and clean the test chamber 1, and reduce the background concentration to a normal range. The pure air circulates in the gas circuit at a specific flow rate and flow rate. First, the test chamber 1 is preheated, which can gradually increase the temperature in the test chamber 1 to a temperature range close to that required for the actual test, thereby avoiding the impact of sudden temperature changes on the interior decoration samples and stabilizing the test environment. At the same time, the pure air fully cleans the test chamber 1, and removes impurities, residual VOCs and other pollutants that may have existed in the chamber, thereby ensuring the purity of the chamber environment at the beginning of the test, and providing good starting conditions for the subsequent accurate measurement of the VOC release of the interior decoration parts.

[0046] The environmental control unit 3 is used to collect temperature, humidity and air flow data inside the test chamber 1, simulate actual environmental temperature conditions, and control the temperature, humidity and air flow inside the test chamber 1;

[0047] The environment control unit 3 includes a temperature control module 31, a humidity control module 32 and a flow control module 33;

[0048] The temperature control module 31 is used to control the temperature change of the test chamber 1, simulating different temperature environments in the car under different climatic conditions and usage scenarios. Through temperature adjustment, the VOC release characteristics of the car interior parts under different temperature conditions can be comprehensively examined. At the same time, the accuracy of temperature control is within ±0.5°C to ensure the stability of the test environment, providing reliable guarantee for accurately studying the influence of temperature on VOC release;

[0049] The humidity control module 32 is used to control the humidity change inside the test chamber 1, simulate different humidity environments affected by factors such as region, weather and usage habits, and can accurately adjust the humidity inside the test chamber 1, simulating the dynamic change process of humidity changing over time;

[0050] The flow control module 33 is used to adjust the air flow inside the test cabin 1 to simulate different ventilation conditions, including breeze, normal driving ventilation and strong ventilation. When simulating breeze conditions, the air flow is small and the air flow rate is controlled at 0.3 meters per second. When simulating normal driving ventilation, the air flow is moderate and the flow rate is controlled at 1.5 meters per second. When simulating strong ventilation, the flow rate can reach 4 meters per second. It can simulate the VOC release and diffusion of interior parts under different air flow conditions, and provide data support for evaluating the changes in air quality in the vehicle under different ventilation conditions.

[0051] The analysis sampling unit 4 is used to obtain air samples inside the test chamber 1 and perform data analysis on the samples;

[0052] The analysis and sampling unit 4 includes an air sampling module 41 and a sample analysis module 42;

[0053] The air sampling module 41 is used to use multi-point sampling, set sampling points at different positions and different heights inside the test cabin 1, and regularly collect multiple groups of samples, taking into account the characteristics of air flow and the existing concentration gradient in the test cabin 1, to ensure that air samples from different areas in the cabin can be fully collected, minimize sampling errors, and fully reflect the true distribution of VOCs in the test cabin;

[0054] The sample analysis module 42 is used to analyze the collected air samples to determine the contents of various VOCs therein.

[0055] The risk assessment unit 5 is used to identify potential carcinogens in the detected VOC components, assess individual exposure risks, and make risk management decisions based on the risk assessment results;

[0056] The risk assessment unit 5 includes a hazardous substance identification module 51, an exposure assessment module 52 and a dose-response relationship assessment module 53;

[0057] The harmful substance identification module 51 is used to perform a detailed component analysis on the VOC obtained by sampling and analysis to determine the carcinogens inside;

[0058] First, a comprehensive screening of VOCs in the sample will be conducted to determine whether they contain known carcinogens. For known carcinogens, high-precision analytical methods will be used to accurately determine their content. For some unknown VOC components, high-resolution mass spectrometry will be used for in-depth screening and identification, and comparison and analysis will be performed with a database of known compounds to discover potential new carcinogens and unknown compounds with potential carcinogenic risks. This comprehensive hazardous substance identification capability can promptly discover various carcinogenic hazards that may exist in automotive interior parts, providing an accurate material basis for subsequent risk assessments.

[0059] The exposure assessment module 52 is used to control the environmental control unit 3 to simulate different exposure scenarios and obtain the exposure concentration of carcinogenic VOCs;

[0060] Obtaining the exposure concentration of carcinogenic VOCs includes simulating different temperature, humidity and ventilation conditions, while considering the release of VOCs from interior parts and the exposure time and frequency of drivers and passengers in the vehicle. Combining the VOC concentration data obtained from sampling analysis and the exposure scenario simulation results, it is possible to accurately obtain the exposure concentration of drivers and passengers to various carcinogenic VOCs in different scenarios. These exposure concentration data provide basic data for subsequent risk assessments, which help to more accurately assess the actual risk of human exposure to carcinogenic VOCs.

[0061] The dose-response relationship assessment module 53 is used to understand the carcinogenic effects and related mechanisms of different doses of carcinogenic VOCs on organisms, establish a dose-response relationship model, calculate the human carcinogenic risk value at different exposure concentrations, and conduct risk level assessment based on the risk value calculation results.

[0062] The formula for calculating the human carcinogenic risk value is as follows:

[0063]

[0064] B sa =L×P f ;

[0065] Among them, L represents the chronic intake of harmful substances, A i Indicates the concentration of harmful substances in the air, C d Indicates the exposure period, C f represents the exposure frequency, C t represents exposure time, B represents respiration rate, H x represents life expectancy, I represents body mass, P f Indicates the carcinogenic factor of a carcinogen.

[0066] The risk level includes five levels: very low, low, medium, high and very high. The risk value is less than 1×10 -7When the risk is very low, it is classified as a very low risk level, with a potential threat to human health of very low, and the risk value is 1×10 -7 -1×10 -6 It is classified as a low risk level. The risk of cancer caused by exposure to carcinogenic VOCs is low and needs to be paid attention to. The risk value is 1×10 -6 -1×10 -4 It is classified as medium risk level, with obvious health risks, and the risk value is 1×10 -4 -1×10 -3 When the risk value is higher than 1×10 -3 When the risk is very high, it is classified as an extremely high risk level, and the risk of cancer in the human body is high. This clear risk level classification can intuitively reflect the degree of cancer risk faced by the human body in different situations.

[0067] The risk assessment unit 5 also includes a risk characterization module 54 and a risk management module 55;

[0068] The risk characterization module 54 is used to evaluate the carcinogenic risk of individual drivers and passengers based on the evaluation results of the exposure evaluation module 52 and the dose-response relationship evaluation module 53, according to the factors of individual sensitivity, age, gender and health status. Different individuals have different sensitivities to carcinogens. Based on these individual factors, a personalized evaluation of the carcinogenic risk of each driver and passenger is performed, so that the risk evaluation results are closer to the actual situation, providing a more accurate basis for formulating targeted risk control measures;

[0069] The risk control module 55 is used to evaluate the accuracy, reliability and representativeness of the data obtained during the sampling and analysis process, analyze the impact of sampling errors, limitations of analytical methods and accuracy of instruments on the data, and perform quantitative processing. By repeating experiments multiple times, comparing the results of different analytical methods and regularly calibrating instruments, the impact of these factors on the data is minimized, the impact of model uncertainty on risk assessment results is eliminated, the reliability of risk assessment results is ensured, and risk control measures and suggestions are proposed based on the results of carcinogenic risk assessment;

[0070] Risk control measures and suggestions include improving the materials of interior parts, selecting environmentally friendly materials with low VOC emissions or even no carcinogen emissions, optimizing the injection molding production process, reducing harmful substances that may be generated during the production process, strengthening production equipment cleaning measures, preventing residual pollutants in the equipment from contaminating interior parts, optimizing the vehicle's ventilation system, improving the air circulation efficiency inside the vehicle, reducing the concentration of carcinogenic VOCs, and updating VOC emission standards for different types of interior parts to make them more stringent and scientific, thereby ensuring the air quality inside the vehicle from the source. Through these risk control measures and suggestions, the potential threat of carcinogenic VOCs in automotive interior parts to the health of drivers and passengers can be effectively reduced, and the safety and environmental friendliness of automotive interiors can be improved.

[0071] The present invention preheats and cleans the interior of the test chamber 1 through the air path cleaning module 2 to prevent the previous test from leaving polluted gas inside the air path, and can reduce the main body concentration to a normal range, reducing errors. The automobile interior decoration sample to be tested is placed inside the test chamber 1, and the environmental control unit 3 collects the environmental data inside the test chamber 1 in real time, controls the temperature, humidity and air flow, and simulates the use of automobile interior decoration parts in different environments, so that the test results are closer to the actual situation, ensuring the accuracy of the test, and facilitating the evaluation and comparison of product quality. The air samples are collected from the inside of the test chamber 1 through the analysis sampling unit 4, including collection at different heights, different areas and different time points. The VOC analysis in the chamber can be more comprehensively reflected through multi-point sampling. The distribution of VOCs is ensured to ensure that the collected samples can represent the VOC release level in the entire test chamber. The types of VOCs in the collected air samples are analyzed to determine which specific VOCs are contained in the samples. After determining the known carcinogens, their contents are further accurately determined. At the same time, unknown VOC components are screened and identified to discover potential new carcinogens and unknown compounds with potential carcinogenic risks, to prevent the occurrence of unknown carcinogens from affecting the accuracy of the test results. The exposure concentration of carcinogens is obtained, and the human carcinogenic risk value under different exposure concentrations is further calculated. Risk level assessment is conducted, and the risk levels are divided into five levels: very low, low, medium, high and very high. According to different risk levels, the influence of errors is eliminated, and risk control measures and suggestions are proposed.

[0072] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A VOC dynamic release test system for automotive interior parts, characterized by: It comprises a test chamber (1), an air path cleaning module (2), an environmental control unit (3), an analysis sampling unit (4) and a risk assessment unit (5); The test chamber (1) is used to place the automobile interior decoration part samples to be tested; The gas path cleaning module (2) is used to introduce pure air into the gas path to preheat and clean the test chamber (1), thereby reducing the background concentration to a normal range; The environmental control unit (3) is used to collect temperature, humidity and air flow data inside the test chamber (1), simulate actual environmental temperature conditions, and control the temperature, humidity and air flow inside the test chamber (1); The analysis sampling unit (4) is used to obtain air samples inside the test chamber (1) and perform data analysis on the samples; The risk assessment unit (5) is used to identify potential carcinogens in the detected VOC components, assess individual exposure risks, and make risk management decisions based on the risk assessment results; The risk assessment unit (5) comprises a hazardous substance identification module (51), an exposure assessment module (52) and a dose-response relationship assessment module (53); The harmful substance identification module (51) is used to perform a detailed component analysis on the VOC obtained through sampling and analysis to determine the carcinogens inside; The exposure assessment module (52) is used to control the environmental control unit (3) to simulate different exposure scenarios and obtain the exposure concentration of carcinogenic VOCs; The dose-response relationship assessment module (53) is used to understand the carcinogenic effects and related mechanisms of different doses of carcinogenic VOCs on organisms, establish a dose-response relationship model, calculate the human carcinogenic risk value at different exposure concentrations, and conduct risk level assessment based on the risk value calculation results.

2. The VOC dynamic release test system for automotive interior parts according to claim 1, characterized in that: The environmental control unit (3) comprises a temperature control module (31), a humidity control module (32) and a flow control module (33); The temperature control module (31) is used to control the temperature change of the test chamber (1) to simulate different temperature environments inside the car under different climatic conditions and usage scenarios; The humidity control module (32) is used to control the humidity change inside the test chamber (1) to simulate different humidity environments affected by factors such as region, weather and usage habits; The flow control module (33) is used to adjust the air flow inside the test chamber (1) to simulate different ventilation conditions, including light breeze, normal driving ventilation and strong ventilation.

3. The VOC dynamic release test system for automotive interior parts according to claim 1 is characterized by: The analysis and sampling unit (4) comprises an air sampling module (41) and a sample analysis module (42); The air sampling module (41) is used to use multi-point sampling, setting sampling points at different positions and different heights inside the test chamber (1) to regularly collect multiple groups of samples; The sample analysis module (42) is used to analyze the collected air samples and determine the contents of various VOCs therein.

4. The VOC dynamic release test system for automotive interior parts according to claim 1 is characterized by: The internal carcinogens include known carcinogens and unknown carcinogens. After determining that the car interior contains known carcinogens, their content is accurately measured. For some unknown VOC components, high-resolution mass spectrometry is used for screening and identification to discover potential new carcinogens and unknown compounds with potential carcinogenic risks.

5. The VOC dynamic release test system for automotive interior parts according to claim 1 is characterized by: The method of obtaining the exposure concentration of carcinogenic VOCs includes simulating different temperature, humidity and ventilation conditions, the release of VOCs from interior parts, and the exposure time and frequency of drivers and passengers in the car, combining the VOC concentration data obtained by sampling and analysis with the exposure scenario simulation results to obtain the exposure concentration of drivers and passengers to various carcinogenic VOCs in different scenarios.

6. The VOC dynamic release test system for automotive interior parts according to claim 1, characterized in that: The formula for calculating the human carcinogenic risk value is as follows: B sa =L×P f ; Among them, L represents the chronic intake of harmful substances, A i Indicates the concentration of harmful substances in the air, C d Indicates the exposure period, C f represents the exposure frequency, C t represents exposure time, B represents respiration rate, H x represents life expectancy, I represents body mass, P f Indicates the carcinogenic factor of a carcinogen.

7. The VOC dynamic release test system for automotive interior parts according to claim 1, characterized in that: The risk levels include very low, low, medium, high and very high, with a risk value of less than 1×10 -7 When the risk is very low, it is classified as a very low risk level, with a potential threat to human health of very low, and the risk value is 1×10 -7 -1×10 -6 It is classified as a low risk level. The risk of cancer caused by exposure to carcinogenic VOCs is low and needs to be paid attention to. The risk value is 1×10 -6 -1×10 -4 It is classified as medium risk level, with obvious health risks, and the risk value is 1×10 -4 -1×10 -3 When the risk value is higher than 1×10 -3 When it is detected, it is classified as an extremely high risk level, and the risk of cancer in the human body is high.

8. The VOC dynamic release test system for automotive interior parts according to claim 1, characterized in that: The risk assessment unit (5) further comprises a risk characterization module (54) and a risk management and control module (55); The risk characterization module (54) is used to evaluate the carcinogenic risk of individual drivers and passengers based on the evaluation results of the exposure evaluation module (52) and the dose-response relationship evaluation module (53) and the factors of individual sensitivity, age, gender and health status; The risk control module (55) is used to evaluate the accuracy, reliability and representativeness of the data obtained during the sampling and analysis process, analyze the impact of sampling errors, limitations of the analysis method and accuracy of the instrument on the data, and perform quantitative processing to eliminate the impact of model uncertainty on the risk assessment results, and propose risk control measures and suggestions based on the results of the carcinogenic risk assessment.

9. The VOC dynamic release test system for automotive interior parts according to claim 8, characterized in that: The risk control measures and suggestions include improving the materials of interior parts, optimizing the injection molding production process, strengthening the cleaning measures of production equipment, optimizing the automobile's ventilation system, and updating the VOC emission standards for different types of interior parts.

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