阅读说明：本技术 车辆的车内空气检测方法及装置 (Method and device for detecting air in vehicle ) 是由 余洁 韩友国 吴洪涛 邰军军 李龄 曹星辰 杨帆 周星 姚宏 于 2021-08-31 设计创作，主要内容包括：本申请涉及车辆技术领域,特别涉及一种车辆的车内空气检测方法及装置,其中,方法包括：接收车辆的空气检测指令；根据空气检测指令控制车辆分别进入预设的静态采样模式和动态采样模式；采集静态采样模式和动态采样模式下的多份车内空气数据,基于车内空气数据分析车内空气成分,得到车辆的车内空气质量结果。由此,解决了相关技术中仅能测试静态状态下的车内空气质量,无法检测车辆使用过程中的真实空气质量,检测可信度度较低,用户体验较差等问题。(The application relates to the technical field of vehicles, in particular to a method and a device for detecting air in a vehicle, wherein the method comprises the following steps: receiving an air detection instruction of a vehicle; controlling the vehicle to respectively enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection instruction; and acquiring a plurality of sets of in-vehicle air data in a static sampling mode and a dynamic sampling mode, and analyzing the components of the in-vehicle air based on the in-vehicle air data to obtain the in-vehicle air quality result of the vehicle. Therefore, the problems that in-vehicle air quality in a static state can only be tested, real air quality in the use process of the vehicle cannot be detected, the detection reliability is low, the user experience is poor and the like in the related technology are solved.)

1. An in-vehicle air detection method of a vehicle, characterized by comprising the steps of:

receiving an air detection instruction of a vehicle;

controlling the vehicle to respectively enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection instruction; and

and acquiring a plurality of sets of in-vehicle air data in the static sampling mode and the dynamic sampling mode, and analyzing the in-vehicle air components based on the in-vehicle air data to obtain the in-vehicle air quality result of the vehicle.

2. The method of claim 1, wherein analyzing an in-vehicle air composition based on the in-vehicle air data to obtain an in-vehicle air quality result for the vehicle comprises:

calculating a first Volatile Organic Compound (VOC) concentration of the vehicle according to the in-vehicle air data in the static sampling mode;

calculating a second VOC concentration of the vehicle from the vehicle air data in the dynamic sampling mode;

and when the first VOC concentration and the second VOC concentration are both smaller than a preset threshold value, judging that the quality result of the air in the vehicle is qualified.

3. The method of claim 1, wherein the static sampling mode is a stationary state of the vehicle, with vehicle doors, windows, and passenger compartment intake and outlet dampers closed, and with onboard equipment in an inoperative state, and wherein the dynamic sampling mode is a stationary state of the vehicle, with vehicle doors, windows, and passenger compartment intake and outlet dampers closed, and with onboard equipment in an operative state.

4. The method of claim 3, wherein the on-board unit is operated as a start-up vehicle, all on-board electronics are turned on, and the on-board air conditioner is operated in a heating mode or a cooling mode with preset parameters.

5. The method of claim 1, further comprising, prior to receiving an air detection command for the vehicle:

acquiring the identity identification information of the vehicle;

determining the setting parameters of a static sampling mode and a dynamic sampling mode of the vehicle according to the identity representation information;

and presetting the static sampling mode and the dynamic sampling mode according to the setting parameters.

6. An in-vehicle air detection device for a vehicle, characterized by comprising:

the receiving module is used for receiving an air detection instruction of the vehicle;

the control module is used for controlling the vehicle to respectively enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection instruction; and

and the analysis module is used for acquiring a plurality of pieces of in-vehicle air data in the static sampling mode and the dynamic sampling mode, and analyzing the components of the in-vehicle air based on the in-vehicle air data to obtain the in-vehicle air quality result of the vehicle.

7. The apparatus of claim 6, wherein the analysis module comprises:

the first calculation unit is used for calculating the first VOC concentration of the vehicle according to the air data in the vehicle in the static sampling mode;

a second calculation unit for calculating a second VOC concentration of the vehicle from the vehicle air data in the dynamic sampling mode;

and the judging unit is used for judging that the quality result of the air in the vehicle is qualified when the first VOC concentration and the second VOC concentration are both smaller than a preset threshold value.

8. The apparatus of claim 6, wherein the static sampling mode is a stationary state of the vehicle, a closed state of a vehicle door, a closed state of a window and a closed state of a passenger compartment air intake and outlet air door, and an inoperative state of an onboard device, and the dynamic sampling mode is a stationary state of the vehicle, a closed state of a vehicle door, a closed state of a window and a closed state of a passenger compartment air intake and outlet air door, and an operative state of the onboard device.

9. The apparatus of claim 8, wherein the onboard equipment is operated as a start-up vehicle, all onboard electronics are turned on, and the onboard air conditioner is operated in a heating mode or a cooling mode with preset parameters.

10. The apparatus of claim 6, further comprising:

the system comprises a setting module, a data processing module and a data processing module, wherein the setting module is used for acquiring the identification information of the vehicle before receiving the air detection instruction of the vehicle, determining the setting parameters of a static sampling mode and a dynamic sampling mode of the vehicle according to the identification information, and presetting the static sampling mode and the dynamic sampling mode according to the setting parameters.

Technical Field

The present disclosure relates to vehicle technologies, and in particular, to a method and an apparatus for detecting air in a vehicle.

Background

With the further development of the domestic automobile industry, consumers pay more and more attention to the safety performance of automobiles, and in the past, the consumers mainly regard automobiles as transportation means, and the automobiles become mobile places which consume most time except for homes of many consumers nowadays, so that the requirements of the consumers on the automobiles are no longer only met for convenience of traveling, and the health care is increasing. In particular, the quality of air in a vehicle is receiving more and more attention from users.

In the related technology, the testing sampling of the VOC (volatile organic compounds) in the whole vehicle is basically required according to the HJ/T400-2007 standard, the vehicle is in a static state, the vehicle door, the vehicle window and the air inlet door of the passenger compartment are all in a closed state, and the engine, the air conditioner and other equipment do not work, so as to realize the detection of the air quality in the vehicle.

However, in the related art, only the in-vehicle air quality in a static state can be tested, and the real air quality of the vehicle in the use process cannot be comprehensively reflected, so that the in-vehicle air quality problem cannot be found in time, the reliability of in-vehicle air detection is reduced, and the use experience of a user is reduced.

Disclosure of Invention

The application provides a method and a device for detecting air in a vehicle, which are used for solving the problems that the air quality in the vehicle in a static state can only be tested, the real air quality in the using process of the vehicle cannot be detected, the detection reliability is low, the user experience is poor and the like in the related technology.

An embodiment of a first aspect of the present application provides an in-vehicle air detection method for a vehicle, including the following steps: receiving an air detection instruction of a vehicle; controlling the vehicle to respectively enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection instruction; and acquiring a plurality of sets of in-vehicle air data in the static sampling mode and the dynamic sampling mode, and analyzing the in-vehicle air components based on the in-vehicle air data to obtain the in-vehicle air quality result of the vehicle.

Further, the analyzing the air composition in the vehicle based on the air data in the vehicle to obtain the air quality result in the vehicle comprises: calculating a first Volatile Organic Compound (VOC) concentration of the vehicle according to the in-vehicle air data in the static sampling mode; calculating a second VOC concentration of the vehicle from the vehicle air data in the dynamic sampling mode; and when the first VOC concentration and the second VOC concentration are both smaller than a preset threshold value, judging that the quality result of the air in the vehicle is qualified.

Further, the static sampling mode is that the vehicle is in a static state, the vehicle door, the window and the air inlet and outlet air door of the passenger compartment are all closed, and the vehicle-mounted device is in a non-working state, and the dynamic sampling mode is that the vehicle is in a static state, the vehicle door, the window and the air inlet and outlet air door of the passenger compartment are all closed, and the vehicle-mounted device is in a working state

Further, the vehicle-mounted equipment is used for starting the vehicle, all the vehicle-mounted electronic equipment is started, and the vehicle-mounted air conditioner is in a heating mode or a cooling mode and works according to preset parameters.

Further, before receiving an air detection instruction of the vehicle, the method further includes: acquiring the identity identification information of the vehicle; determining the setting parameters of a static sampling mode and a dynamic sampling mode of the vehicle according to the identity representation information; and presetting the static sampling mode and the dynamic sampling mode according to the setting parameters.

An embodiment of a second aspect of the present application provides an in-vehicle air detection apparatus for a vehicle, including: the receiving module is used for receiving an air detection instruction of the vehicle; the control module is used for controlling the vehicle to respectively enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection instruction; and the analysis module is used for acquiring a plurality of pieces of in-vehicle air data in the static sampling mode and the dynamic sampling mode, and analyzing the components of the in-vehicle air based on the in-vehicle air data to obtain the in-vehicle air quality result of the vehicle.

Further, the analysis module includes: the first calculation unit is used for calculating the first VOC concentration of the vehicle according to the air data in the vehicle in the static sampling mode; a second calculation unit for calculating a second VOC concentration of the vehicle from the vehicle air data in the dynamic sampling mode; and the judging unit is used for judging that the quality result of the air in the vehicle is qualified when the first VOC concentration and the second VOC concentration are both smaller than a preset threshold value.

Further, the static sampling mode is that the vehicle is in a static state, the vehicle door, the window and the air inlet and outlet air door of the passenger compartment are all closed, and the vehicle-mounted device is in a non-working state, and the dynamic sampling mode is that the vehicle is in a static state, the vehicle door, the window and the air inlet and outlet air door of the passenger compartment are all closed, and the vehicle-mounted device is in a working state

Further, the vehicle-mounted equipment is used for starting the vehicle, all the vehicle-mounted electronic equipment is started, and the vehicle-mounted air conditioner is in a heating mode or a cooling mode and works according to preset parameters.

Further, still include: the system comprises a setting module, a data processing module and a data processing module, wherein the setting module is used for acquiring the identification information of the vehicle before receiving the air detection instruction of the vehicle, determining the setting parameters of a static sampling mode and a dynamic sampling mode of the vehicle according to the identification information, and presetting the static sampling mode and the dynamic sampling mode according to the setting parameters.

Therefore, the application has at least the following beneficial effects:

the VOC analysis is carried out through respectively sampling the air in the vehicle under different states, the real air quality of the vehicle in the use process can be comprehensively reflected, and the reliability of the air detection in the vehicle is effectively improved, so that testers can comprehensively and accurately know the VOC state of the whole vehicle, the problem of the air quality in the vehicle is timely found, the test experience is improved, the vehicle with unqualified air quality is prevented from being sold on the market, and the harm to the body of a consumer can be brought. Therefore, the technical problems that in-vehicle air quality in a static state can only be tested, real air quality in a vehicle using process cannot be detected, detection reliability is low, user experience is poor and the like in the related technology are solved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an in-vehicle air detection device of a vehicle according to an embodiment of the present application;

fig. 2 is a schematic flowchart of an in-vehicle air detection method of a vehicle according to an embodiment of the present application;

fig. 3 is a schematic flowchart of an in-vehicle air detection method for a vehicle according to an embodiment of the present application;

fig. 4 is a block schematic diagram of an in-vehicle air detection device of a vehicle according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

The inventors have made this application based on the following questions and insights:

under the environment of certain temperature and humidity, due to the emission of non-metal interior trim parts (materials) of an automobile and other reasons, harmful and unpleasant gases enter air in the automobile, a human body is in the environment with the exceeding of the harmful gases for a long time and can generate certain harm to the body, the content of eight organic matters including benzene, toluene, xylene, ethylbenzene, styrene, formaldehyde, acetaldehyde and acrolein in GB/T27630 plus 2011 air quality evaluation guideline for passenger cars is limited, and the content of VOC in the automobile is one of the necessary control modules in the development process of automobile performance in various large host plants.

VOC is a volatile organic compound, and mainly refers to eight organic compounds of benzene, toluene, xylene, ethylbenzene, styrene, formaldehyde, acetaldehyde and acrolein specified in GB/T27630-2011 guide for evaluating air quality in passenger cars, and at present, VOC testing and sampling in the whole car basically meets the requirement of HJ/T400-2007 standard, the car is in a static state, air doors of the car door, the window and the air inlet air door of the passenger compartment are all in a closed state, and equipment such as an engine, an air conditioner and the like does not work.

Because the method is used for sampling in a static state, the sampling method is only suitable for testing and sampling for simulating the parking working condition at night and cannot comprehensively reflect the air state of the vehicle in the using process. The concentration of harmful gas in the whole vehicle is in a linear relation with the ambient temperature in the vehicle, and the concentration is increased along with the increase of the temperature, so that the air quality in the use process of the whole vehicle cannot be completely described only by using the air quality under the static state.

The application aims to provide a complete vehicle VOC in-vehicle air sampling method to solve the problem that the existing sampling method cannot comprehensively reflect the in-vehicle air of vehicles in different states. The concentration of harmful gas in the vehicle in a static state and a dynamic air conditioner opening state is different, only the air in the vehicle in the static state is sampled, the state of the air in the vehicle in the actual use process of the vehicle cannot be truly reflected, if the concentration of the harmful gas in the vehicle in the static state is qualified, the harmful gas in the vehicle is determined to meet the requirement in the development process, but the concentration of the harmful gas in the vehicle is unqualified due to the temperature rise in the vehicle running state, particularly in the air conditioner opening state, the complaint of the vehicle using of a consumer is inevitably caused, and the harm is brought to the body of the consumer more seriously.

An in-vehicle air detection method and apparatus of a vehicle according to an embodiment of the present application are described below with reference to the drawings. In the method, the real air quality of the vehicle in the using process can be comprehensively reflected by respectively sampling the air in the vehicle in different states for VOC analysis, the reliability of the air detection in the vehicle can be effectively improved, so that testers can comprehensively and accurately know the VOC state of the whole vehicle, the problem of the air quality in the vehicle can be timely found, the test experience is improved, vehicles with unqualified air quality are prevented from being sold on the market, and the harm can be brought to the bodies of consumers. Therefore, the technical problems that in-vehicle air quality in a static state can only be tested, real air quality in a vehicle using process cannot be detected, detection reliability is low, user experience is poor and the like in the related technology are solved.

Specifically, the present application may employ an in-vehicle air detection device of a vehicle as shown in fig. 1 for air detection, the detection device including: the device comprises a detected vehicle 1, a polytetrafluoroethylene tube 2, a silicone rubber tube 3, a sampling tube 4, a constant-flow gas sampler 5, a primary soap film flowmeter, a sampling conduit, an anemometer and a temperature and humidity meter.

Wherein, the constant current gas sampler: the flow rate is adjustable within the range of 50-1000 ml/min, and the flow rate is stable. And the error of the two times is less than 5% when the primary soap film flowmeter is used for calibration after the sampling pipe is connected. A first-stage soap film flowmeter: and calibrating the constant-flow gas sampler. Sampling a catheter: low emission polytetrafluoroethylene tubing and silicone rubber tubing. Sampling tube: the device comprises a Tenax-TA sampling tube and a DNPH sampling tube, wherein the Tenax-TA sampling tube collects volatile organic compounds in the air in the vehicle, and the DNPH sampling tube collects aldehyde ketone substances in the air in the vehicle. Sampling an environment cabin: the temperature range is 10-50 ℃, the humidity range is 20-80%, the building enclosure has a complete enclosure structure, the inner surface of the cabin body is made of low-release, low-permeability and low-adsorption materials, and materials, facilities and the like which volatilize and influence the background concentration value of environmental pollutants are avoided being placed in the cabin.

Fig. 2 is a schematic flow chart of an in-vehicle air detection method of a vehicle according to an embodiment of the present application.

As shown in fig. 2, the in-vehicle air detection method of the vehicle includes the steps of:

in step S101, an air detection command of the vehicle is received.

In step S102, the vehicle is controlled to enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection command.

In this embodiment, the static sampling mode is a state where the vehicle is in a static state, the vehicle door, the window, the air inlet and outlet air door of the passenger compartment are all closed, and the vehicle-mounted device is in an inoperative state, and the dynamic sampling mode is a state where the vehicle is in a static state, the vehicle door, the window, the air inlet and outlet air door of the passenger compartment are all closed, and the vehicle-mounted device is in an operative state.

The vehicle-mounted equipment works as a starting vehicle, all vehicle-mounted electronic equipment is started, and the vehicle-mounted air conditioner works in a heating mode or a cooling mode according to preset parameters.

Specifically, (1) when the vehicle is in a static sampling mode, the windows and doors which can be opened are completely opened, the static placement time is not less than a first preset time, such as 6h, and then all the windows and doors are completely closed; and ensuring that the vehicle is in a closed state and maintaining for a second preset time, such as 16 h. The detected vehicle is in a static state, and the door, the window, the air inlet air door of the passenger compartment, the engine, all gas equipment (such as an air conditioner) and the like of the vehicle are in a closed state.

(2) When the vehicle is in the dynamic sampling mode, the vehicle-mounted air conditioner is in the refrigeration mode, windows and doors which can be opened are completely opened, the static placing time is not less than a third preset time, such as 6 hours, then all the windows and doors are completely closed, the vehicle is started, all the electric equipment in the vehicle is started, the temperature of the air conditioner is adjusted to be the lowest, the A/C is started, the air outlet is in the blowing mode, the air volume is in a middle gear, the circulation mode is in internal circulation, the fourth preset time is maintained, and the vehicle-mounted air conditioner is stopped after 2 hours.

(2) When the vehicle is in the dynamic sampling mode, the vehicle-mounted air conditioner is in the heating mode, the windows and the doors which can be opened are completely opened, the static placing time is not less than a fifth preset time, such as 6h, then all the windows and the doors are completely closed, the vehicle is started, all the electric equipment in the vehicle is started, and the temperature of the air conditioner is adjusted to be the highest: the heating mode is opened, the air outlet is in a blowing mode, the air quantity is in a middle gear, and the circulation mode is in internal circulation.

In step S103, a plurality of sets of in-vehicle air data in the static sampling mode and the dynamic sampling mode are collected, and the in-vehicle air composition is analyzed based on the in-vehicle air data, so as to obtain an in-vehicle air quality result of the vehicle.

It can be understood that the embodiment of the invention respectively samples the air in the vehicle under different states to perform VOC analysis, can comprehensively know the VOC state of the whole vehicle, can timely find the problem of the air quality in the vehicle, and adopts the adjustment measures to avoid the complaints of customers caused by the market selling of the vehicle.

In this embodiment, analyzing the in-vehicle air composition based on the in-vehicle air data to obtain an in-vehicle air quality result of the vehicle includes: calculating the VOC concentration of a first volatile organic compound of the vehicle according to the air data in the vehicle in the static sampling mode; calculating a second VOC concentration of the vehicle from the vehicle air data in the dynamic sampling mode; and when the first VOC concentration and the second VOC concentration are both smaller than a preset threshold value, judging that the air quality result in the vehicle is qualified.

The preset threshold may be specifically set according to the qualified standard of VOC, and is not specifically limited in this regard.

It can be understood that the VOC state of the whole vehicle can be comprehensively known by the embodiment of the invention, and the VOC state mainly comprises two states: the first type is air sampling under the static state, the second type is air sampling in the car when the air conditioner is opened for the idle speed, and the VOC concentration is qualified under the two states, so that the content of harmful substances in the car is determined to meet the requirement, and the problem that the air in the car in different states of the car cannot be comprehensively reflected in a sampling method in the related art can be solved.

In some embodiments, before receiving an air detection command of the vehicle, the method further comprises: acquiring identity identification information of a vehicle; determining the setting parameters of a static sampling mode and a dynamic sampling mode of the vehicle according to the identity representation information; and presetting a static sampling mode and a dynamic sampling mode according to the setting parameters.

The identification information may include a vehicle identification number; it can be understood that the type of the vehicle can be determined according to the vehicle identification number, and therefore sampling parameters are specifically set according to the type of the vehicle, the method and the device are suitable for detecting the air quality in the vehicles of different types, and the accuracy of detection is improved.

The method for detecting air in a vehicle will be explained by a specific embodiment, wherein the specific application scenario is as follows: the detected vehicle is the whole vehicle within 4 weeks of the off-line, and the seller or the user can not modify the interior trim before the test; adsorption or purification devices that affect the results of the test cannot be temporarily installed in the vehicle under test unless these devices are necessary for the production requirements. In a specific embodiment, the detection device shown in fig. 1 is used for detection, and as shown in fig. 3, the detection method includes the following steps:

1. static downsampling:

a) setting the temperature of the environmental chamber: 25.0 +/-1.0 ℃; relative humidity: 50% +/-10%; the ambient air flow velocity is less than or equal to 0.3m/s

b) Sample point settings, as shown in table 1:

TABLE 1

c) Sampling:

the method comprises the steps of placing a detected vehicle into a sampling environment cabin, removing surface coverings (such as plastic films used for protecting seats, carpets and the like when the vehicle leaves a factory) of interior parts of the vehicle, and taking the coverings away from the environment cabin for placement. The openable windows and doors are completely opened, the standing time is not less than 6h, and then all the windows and doors are completely closed, so that the vehicle is ensured to be in a closed state and maintained for 16 h. The detected vehicle is in a static state, and the door, the window, the air inlet air door of the passenger compartment, the engine, all gas equipment (such as an air conditioner) and the like of the vehicle are in a closed state. Taking an M1 vehicle as an example, volatile organic compounds and aldehyde ketone substances in the vehicle are sampled by referring to FIG. 2.

2. The method comprises the following steps of (1) air conditioner starting state down sampling, namely dynamic sampling:

refrigeration mode

a) Setting the temperature of the environmental chamber: at 45 +/-1.0 ℃; relative humidity: 50% +/-10%; the ambient air flow velocity is less than or equal to 0.3m/s

b) Setting sampling points: same static down-sampling point setting

c) Sampling:

the method comprises the steps of placing a detected vehicle into a sampling environment cabin, removing surface coverings (such as plastic films used for protecting seats, carpets and the like when the vehicle leaves a factory) of interior parts of the vehicle, and taking the coverings away from the environment cabin for placement. The method comprises the steps of completely opening windows and doors which can be opened, standing for not less than 6 hours, then completely closing all the windows and doors, starting a vehicle, opening all electric equipment in the vehicle, adjusting the temperature of an air conditioner to be lowest, turning on A/C, enabling air to be in a blowing mode, enabling air quantity to be in a middle gear, enabling a circulation mode to be in an inner circulation mode, and maintaining for 2 hours. Taking an M1 vehicle as an example, volatile organic compounds and aldehyde ketone substances in the vehicle are sampled by referring to FIG. 1.

(2) Heating mode

a) Setting the temperature of the environmental chamber: 10 +/-1.0 ℃; relative humidity: 50% +/-10%; the ambient air flow velocity is less than or equal to 0.3m/s

b) Setting sampling points: same static down-sampling point setting

c) Sampling:

the method comprises the steps of placing a detected vehicle into a sampling environment cabin, removing surface coverings (such as plastic films used for protecting seats, carpets and the like when the vehicle leaves a factory) of interior parts of the vehicle, and taking the coverings away from the environment cabin for placement. The window that can open, door are opened completely, and static standing time is no less than 6h, and later all windows and doors are closed completely, start the vehicle, open all consumer in the car, and air conditioner temperature is transferred to the highest: the heating mode is opened, the air outlet is in a blowing mode, the air quantity is in a middle gear, and the circulation mode is in internal circulation. Taking an M1 vehicle as an example, volatile organic compounds and aldehyde ketone substances in the vehicle are sampled by referring to FIG. 1.

3. Attention point at sampling:

1) the distance between the constant-current gas sampler and the outer surface of the detected vehicle is not more than 0.5m, and the height of the constant-current gas sampler is equivalent to the position of a sampling point in the vehicle.

2) Before each sampling, the constant-flow gas sampler connected with the sampling pipe must be subjected to flow calibration by using a primary flow meter.

3) Volatile organic compounds in the vehicle are collected by using a Tenax-TA sampling tube, and the sampling flow is as follows: 100 ml/min-200 ml/min, and the sampling time is 30 min.

4) Using a DNPH sampling tube to trap aldehyde ketone substances in the vehicle, and sampling flow: 100 ml/min-500 ml/min, and the sampling time is 30 min.

5) And after sampling is finished, the sampling volume must be accurately recorded, and the volume of the collected gas is not more than 5% of the volume in the vehicle.

6) Air samples of the environment of the vehicle to be inspected should be taken at the same time each time.

4. Sampling and recording:

the conditions of the detected vehicle, the environmental conditions, the sampling pipe and the like are recorded in time during sampling, and the table is shown as a chart 2.

TABLE 2

5. And (4) judging a result:

and when the three-wheel sampling is completely finished, analyzing the results by using a gas chromatography mass spectrometer and a liquid chromatograph, judging that the quality of the air in the vehicle is unqualified if any result does not meet the requirements, and judging that the quality of the air in the vehicle is qualified only if the three-wheel results meet the requirements.

According to the method for detecting the air in the vehicle, the air in the vehicle in different states is respectively sampled to carry out VOC analysis, the real air quality of the vehicle in the using process can be comprehensively reflected, the reliability of the air detection in the vehicle is effectively improved, so that testers can comprehensively and accurately know the VOC state of the whole vehicle, the problem of the air quality in the vehicle is timely found, the test experience is improved, the condition that the air quality is unqualified is avoided, and the harm is brought to the bodies of consumers is avoided.

Next, an in-vehicle air detection device of a vehicle according to an embodiment of the present application is described with reference to the drawings.

Fig. 4 is a block schematic diagram of an in-vehicle air detection device of a vehicle according to an embodiment of the present application.

As shown in fig. 4, the in-vehicle air detection device 10 of the vehicle includes: a receiving module 100, a control module 200 and an analysis module 300.

The receiving module 100 is configured to receive an air detection instruction of a vehicle; the control module 200 is used for controlling the vehicle to respectively enter a preset static sampling mode and a preset dynamic sampling mode according to the air detection instruction; the analysis module 300 is configured to collect multiple sets of in-vehicle air data in a static sampling mode and a dynamic sampling mode, and analyze components of in-vehicle air based on the in-vehicle air data to obtain an in-vehicle air quality result of the vehicle.

Further, the analysis module 300 includes: the device comprises a first calculating unit, a second calculating unit and a judging unit. The first calculation unit is used for calculating the VOC concentration of a first volatile organic compound of the vehicle according to the air data in the vehicle in the static sampling mode; a second calculation unit for calculating a second VOC concentration of the vehicle from the vehicle air data in the dynamic sampling mode; and the judging unit is used for judging that the air quality result in the vehicle is qualified when the first VOC concentration and the second VOC concentration are both smaller than a preset threshold value.

Further, the static sampling mode is that the vehicle is in a static state, air inlets and air outlets of a vehicle door, a vehicle window and a passenger compartment are all closed, and the vehicle-mounted equipment is in a non-working state, and the dynamic sampling mode is that the vehicle is in a static state, the air inlets and the air outlets of the vehicle door, the vehicle window and the passenger compartment are all closed, and the vehicle-mounted equipment is in a working state

Further, the vehicle-mounted equipment is used for starting the vehicle, all the vehicle-mounted electronic equipment is started, and the vehicle-mounted air conditioner is in a heating mode or a cooling mode and works according to preset parameters.

Further, the apparatus 10 of the embodiment of the present application further includes: and setting a module. The setting module is used for acquiring the identity information of the vehicle before receiving the air detection instruction of the vehicle, determining the setting parameters of the static sampling mode and the dynamic sampling mode of the vehicle according to the identity representing information, and presetting the static sampling mode and the dynamic sampling mode according to the setting parameters.

It should be noted that the foregoing explanation of the embodiment of the method for detecting air in a vehicle is also applicable to the apparatus for detecting air in a vehicle in the embodiment, and is not repeated herein.

According to the in-vehicle air detection device of vehicle that this application embodiment provided, through sampling respectively to the in-vehicle air under the different states and carry out VOC analysis, can reflect the real air quality of vehicle in the use comprehensively, effectively promote the credibility of in-vehicle air detection to be convenient for the tester comprehensively accurately knows whole car VOC state, in time discover the problem of air quality in the car, promote test experience, and avoid the unqualified vehicle of air quality to go on the market, can bring harm for consumer's health.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.