A rapid sampling device and method for rapid chemical detection equipment of automobile odor

Abstract

The present invention provides a rapid sampling device and method for a chemical rapid detection device for automobile odor, and relates to the technical field of odor detection. The method comprises: at the initial moment, the sampling needle is controlled to be inserted into the headspace bottle, and the vacuum pump is started, so that the standard gas in the headspace bottle flows into the gas inlet and the quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve; after a set time period from the initial moment, the air pressure in the headspace bottle reaches the ambient air pressure, the vacuum pump is controlled to be closed, and the rapid detection device detector is started; the standard gas in the quantitative ring of the six-way valve enters the chromatographic column; after the rapid detection device detector completes the gas detection, the six-way valve is controlled to rotate again, the pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere. The present invention can discharge the pressurized gas in the headspace bottle in advance, so that the pressure difference between the inside and outside of the headspace bottle is 0, thereby realizing the sampling and gas detection of the headspace bottle in a timely and accurate manner.

Description

Technical Field

[0001] The invention relates to the technical field of odor detection, and in particular to a rapid sampling device and method for a rapid chemical detection device for automobile odor. Background Art

[0002] In recent years, the smell in cars has been a widely concerned issue for consumers, and the major automobile OEMs have also been paying more and more attention to the smell. At present, the smell in cars in the industry often requires professional odor evaluators to evaluate. Evaluators need to undergo training and assessment before taking up their posts. Before the odor evaluation, the evaluator's status needs to be assessed. After passing the assessment, the evaluator can only smell a few samples per day. In addition to the relatively high personnel cost and limited number of evaluations, subjective odor evaluation is also easily affected by the status of personnel. In addition, in the process of tracing back to the source or forward development of the OEM, it is often necessary to combine the test data of the gas chromatography-mass spectrometry to analyze the substances that actually affect the odor, which is often inefficient and time-consuming.

[0003] Therefore, rapid testing equipment that can conduct objective evaluation and rapid analysis of odor substances at the same time is particularly important. Many odor substances have high polarity and are more prone to adsorption, so when choosing a sampling method, it is necessary to choose a method that will not adsorb. Due to the different olfactory thresholds of different substances, it is sometimes difficult to accurately quantify the odor level using a simple detector. In order to analyze special odor substances, it is more appropriate to use equipment that can perform full-component sampling and analysis. After sampling, all components of the gas are analyzed, and then the odor level of the sample is fitted through the database and model.

[0004] However, during the industrialization process of this type of product, there are often large differences between detectors, and the differences between units cannot be reduced in a short period of time to achieve the application of databases and models. In order to use the same database and mathematical model, each detector needs to be factory calibrated and calibrated regularly.

[0005] The calibration and calibration of this type of product is usually carried out by preparing an odor bag containing a specified concentration of odor substances, that is, injecting a certain volume of gas and a certain volume of standard solution into the odor bag and mixing them thoroughly, or diluting the standard gas to a specified concentration. This method requires a separate configuration for each concentration and cannot be batch injected. The overall automation is low and time-consuming. Especially when there are many types of standard substances, the time and labor costs required for calibration and calibration will increase significantly. In addition, affected by the physicochemical properties of the standard, the volatilization, saturation, and adsorption rates of the compounds are different. The odor bag may have residual standard solution or adsorption of special substances, causing the results to deviate from expectations.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] In view of the above problems, the present invention proposes a rapid sampling device and method for a rapid chemical detection device for automobile odor, which can discharge the pressurized gas in the headspace bottle in advance before the detector works, so that the pressure difference between the inside and outside of the headspace bottle is 0, thereby realizing the sampling and gas detection of the headspace bottle in a timely and accurate manner.

[0008] In a first aspect, the present invention provides a rapid sampling method for a rapid chemical detection device for automobile odor, comprising:

[0009] At the initial moment, the injection needle is controlled to penetrate into the headspace bottle, and the vacuum pump is started, so that the standard gas in the headspace bottle flows into the gas inlet and the quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve;

[0010] After a set time has passed since the initial moment, the air pressure in the headspace bottle reaches the ambient air pressure, the vacuum pump is controlled to be turned off, and the detector of the rapid testing device is started;

[0011] Controlling the six-way valve to rotate so that the standard gas in the quantitative loop of the six-way valve enters the chromatographic column;

[0012] After the rapid detection device detector completes the gas detection, the six-way valve is controlled to rotate again, pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere.

[0013] In a second aspect, the present invention provides a rapid sampling device for a rapid chemical test device for automobile odor, comprising: a controller, a rapid test device detector, a headspace bottle, and a vacuum pump;

[0014] The controller is connected to the rapid detection device detector, the six-way valve and the injection needle, and is used to control the injection needle to penetrate into the head space bottle at the initial moment, and start the vacuum pump, so that the standard gas in the head space bottle flows into the gas inlet and the quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve; after a set time period from the initial moment, the air pressure in the head space bottle reaches the ambient air pressure, the vacuum pump is controlled to be closed, and the rapid detection device detector is started; the six-way valve is controlled to rotate, so that the standard gas in the quantitative ring of the six-way valve enters the chromatographic column; after the rapid detection device detector completes gas detection, the six-way valve is controlled to rotate again, pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] 1. The present invention realizes the compatibility of the headspace sampler and the detector of the rapid detection equipment, that is, the early triggering of the sampler in the detector of the rapid detection equipment is realized, so that the pressurized standard gas in the headspace bottle is released in advance, the pressure of the injection process is reduced, and the normalized continuous injection of gas is realized. By adding a vacuum pump and injecting the pressurized inert gas into the six-way valve through the headspace bottle, the residual gas in the six-way valve is controlled to be discharged into the atmosphere, which solves the problem of pipeline residue during continuous injection.

[0017] 2. The present invention can greatly shorten the preparation time and injection cycle of standard gas. Among them, the sample preparation time can be shortened by 80%. The experimenter only needs to inject the standard gas of the specified concentration into the headspace bottle and write the sequence for analysis. There is no need to prepare the gas bag, flush a certain volume of gas, mix it thoroughly, and repeat the operation of the equipment for injection. Based on the average daily working hours of 8 hours for the staff (8 samples are analyzed manually every day, and 40 samples can be analyzed every day after the transformation), the standard gas injection cycle can be increased by 5 times by using the headspace sampler for continuous injection, and it is estimated that 70 days of labor costs will be saved each year.

[0018] 3. The present invention can reduce the error caused by human factors and enhance the accuracy of the test. When using headspace sampling, the calculation uncertainty only needs to inject the standard gas, while when using the odor bag, in addition to injecting the gas, it is also necessary to consider the gas filling volume, whether the sample is adsorbed, whether the sample is fully volatilized, whether the sample is evenly distributed, and whether the ambient temperature and air pressure have an impact, which will obviously increase the error and uncertainty.

[0019] 4. The present invention can significantly reduce the cost of consumables. When using a glass headspace bottle for sampling, after cleaning the headspace bottle, you only need to replace the headspace bottle cap to continue using it. However, the odor bag injected with liquid is mostly disposable, and the cleaning and aging of the odor bag are more complicated, costing tens to hundreds of yuan, and it is easy to have chemical residues, which affects the test results.

[0020] 5. This patent enables the database of rapid testing equipment to be adapted to multiple detectors, so that the detectors have higher consistency and versatility after mass production.

[0021] 6. The present invention can avoid the deviation of quantitative results caused by adsorption of odor bags, and can reduce the high manpower and time costs incurred in the curve establishment process through coefficient calculation.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above description and other purposes, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0024] Figure 1 This is a flow chart of a rapid sampling method for a rapid chemical detection device for automobile odor provided by an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of a six-way valve state provided by an embodiment of the present invention;

[0026] Figure 3 is another schematic diagram of the six-way valve state provided by an embodiment of the present invention;

[0027] Figure 4 This is another schematic diagram of the status of a six-way valve provided by an embodiment of the present invention;

[0028] Figure 5 The present invention is a schematic diagram of the structure of a rapid chemical detection device for automobile odor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In order to clearly illustrate the creativity of the solution provided by the present invention, the disadvantages of constructing a standard curve by the traditional air bag sampling method are first explained. A certain volume of gas and a certain volume of standard solution are injected into an odor bag and fully mixed, or a standard gas is used to dilute to a specified concentration. This method requires a separate configuration for each concentration and cannot be batch-sampled. The overall automation is low and time-consuming, and the air bag sampling will cause residues in multiple links, resulting in an inaccurate standard curve. Based on this, the present invention provides a method of using a head space bottle for continuous sampling to calculate a standard curve under a head space sampling method. After coefficient correction, a standard curve is obtained during air bag sampling, so that when the gas is collected through the air bag later, the corrected standard curve can be used to analyze the concentration of the gas. Furthermore, when using a head space bottle for continuous sampling, the problem that the high-pressure gas in the head space bottle will be taken away instantly and cannot be effectively captured by the quantitative loop is solved, and the problem of gas residue in the detector is solved, so that continuous sampling can be achieved and will not be affected by the historical injection gas. The following is a specific description through two embodiments.

[0032] Example 1

[0033] This embodiment provides a rapid sampling method for a rapid chemical detection device for automobile odor. This method is applicable to the case where a headspace bottle is used to sample standard gas. The method provided in this embodiment is executed by a controller and is composed of software and / or hardware.

[0034] See also Figure 1 , the method provided in this embodiment includes the following operations:

[0035] S110, at the initial moment, control the injection needle to penetrate into the head space bottle, and start the vacuum pump, so that the standard gas in the head space bottle flows into the gas inlet and quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve.

[0036] Before S110, a liquid with a standard concentration needs to be injected into the headspace bottle and sealed. The concentration of the injected standard liquid is known and it is at normal pressure. The gas in the headspace bottle is heated before injection. The temperature rises, which increases the gas pressure in the headspace bottle and forms a high-pressure standard gas in the headspace bottle.

[0037] At the initial time t0, the controller controls the injection needle to penetrate the headspace bottle. Since the pressure difference between the inside and outside of the headspace bottle is large at this time, in order to prevent the high-pressure standard gas from being instantly taken away to the atmosphere and not being effectively captured by the quantitative loop, the detector of the rapid detection equipment is not turned on at this time, and the status of the six-way valve is shown in Figure 2 The standard gas in the headspace bottle flows into the gas inlet and quantitative ring of the six-way valve, and flows out from the outlet of the six-way valve. The vacuum pump is connected to the outlet of the six-way valve, and the standard gas is extracted under the action of the vacuum pump. Note that the vacuum pump can withstand pressure in a short time to reduce the air pressure in the headspace bottle to the ambient pressure, and the difference between the air pressure in the headspace bottle and the ambient pressure outside the headspace bottle is 0.

[0038] Optionally, in order to control the passage between the vacuum pump and the outlet, a solenoid valve is provided between the vacuum pump and the six-way valve. For example, a two-position three-way valve is provided, which is connected to the outlet, the vacuum pump and the atmosphere respectively. Figure 2 , the controller controls the solenoid valve to connect the air pump and the outlet of the six-way valve, closes the channel between the outlet and the atmosphere, and allows the standard gas to flow into the air pump from the outlet of the six-way valve, that is, the standard gas is in accordance with Figure 2 There is flow in the solid channel and no standard gas in the dotted channel.

[0039] S120, after a set period of time has passed since the initial moment, the air pressure in the headspace bottle reaches the ambient air pressure, the vacuum pump is controlled to be closed, and the rapid detection device detector is started.

[0040] As the vacuum pump extracts the standard gas, the air pressure in the headspace bottle gradually decreases to the ambient pressure. In this embodiment, after a set time of m seconds from the initial moment when the vacuum pump is turned on, that is, when t1=t0+m, the air pressure in the headspace bottle reaches the ambient pressure. At this time, the controller controls the vacuum pump to close, and the outlet of the six-way valve is closed. The standard gas at normal pressure fills the quantitative loop and is fully captured by the quantitative loop. At t1, the controller starts the rapid detection device detector. The rapid detection device detector is a multifunctional and highly sensitive gas chromatography detector, which detects the gas concentration through the response of the chromatographic column.

[0041] In the present invention, the set time is the time it takes for the air pressure in the headspace bottle to drop to the ambient pressure. Due to the different air pressures in the headspace bottle and the different ambient pressures, the speed of gas outflow will be affected. Even if a vacuum pump is used to pump air at a certain flow rate, it is difficult to determine the set time. According to the ideal gas law, pv=nRT: the magnitude of the gas pressure is proportional to the amount of gas (n), the temperature of the gas (T), and inversely proportional to the volume of the gas (v). R is the universal gas constant, which is approximately 8.31441±0.00026J / (mol·K), and p is the air pressure (i.e., pressure). Therefore, the air pressure can be reduced by reducing the amount of gas in the headspace bottle through a vacuum pump. Therefore, in this embodiment, a pressure sensor is provided in the headspace bottle, and the pressure sensor is connected to the controller by wireless communication. The controller detects the air pressure in the headspace bottle through the pressure sensor at the mouth of the headspace bottle; and calculates the difference between the air pressure in the headspace bottle and the ambient pressure. When the vacuum pump operates at a fixed power (extracting a fixed amount of gas per unit time), the difference has a one-to-one correspondence with the set time. Therefore, the set time required for the standard gas in the head space bottle to reduce the pressure can be determined based on the pre-established correspondence.

[0042] S130, controlling the six-way valve to rotate so that the standard gas in the quantitative loop of the six-way valve enters the chromatographic column.

[0043] At t1, the controller controls the six-way valve to rotate. The status of the six-way valve is shown in Figure 3 The standard gas in the six-way valve quantitative loop enters the chromatographic column, that is, the standard gas is Figure 3 Solid channel flows.

[0044] The fast-test device detector detects the standard gas. Assuming the detection time is n seconds, the gas detection is completed at t2=t1+n. In actual operation, you can know whether the gas detection is completed through the prompt of the fast-test device detector.

[0045] S140. After the rapid detection device detector completes the gas detection, the six-way valve is controlled to rotate again, pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere.

[0046] At t2, the controller controls the six-way valve to rotate again. The status of the six-way valve is shown in Figure 4 . The controller controls the current headspace bottle gas circuit to be closed, and the gas circuit is transferred to the nitrogen carrier gas (directly transmitted through the nitrogen bottle, without the participation of the headspace bottle). The set temperature of the quantitative loop is higher than the temperature during the test. At this time, the outlet of the six-way valve is connected to the atmosphere, thereby controlling the six-way valve and the residual gas in the quantitative loop to be discharged into the atmosphere. This step can discharge the adsorbed and residual gas in the quantitative loop by aging. The pressurized inert gas is preferably high-pressure nitrogen.

[0047] Optional, see Figure 4 , the controller controls the solenoid valve to connect the atmosphere with the outlet of the six-way valve, so that the residual gas in the six-way valve is discharged to the atmosphere, that is, the residual gas is discharged according to Figure 4 The solid line channel flows. Note that the vacuum pump is not working at this time, and the residual gas does not pass through the vacuum pump, eliminating the flow limit of the pump; it is linked with the nitrogen bottle so that the pipeline is pressurized by high-pressure nitrogen during aging, and the residual in the terminal gas path is emptied at the same time. Then, the injection bottle filled with new standard gas can be replaced for continuous injection, and return to S110.

[0048] Optionally, in order to avoid making a standard curve of gas by air bag sampling, this embodiment uses head space sampling to make a standard curve of gas. However, in the actual detection process, most of the concentration is detected by collecting gas by air bag. Therefore, it is also necessary to use a coefficient to correct the standard curve obtained by head space sampling to obtain a standard curve of standard gas in the air bag sampling method (the standard curve is not actually drawn by air bag sampling, but obtained by correction), so that when collecting gas by air bag, the corrected standard curve is used to analyze the concentration of gas.

[0049] The coefficient is obtained by the following steps: obtain a first response value and a second response value by head space sampling and air bag sampling respectively for the same concentration of gas; determine the coefficient according to the ratio of the first response value to the second response value. The response value refers to the signal intensity or peak area. Assume that the first response value v1 of a concentration of gas is obtained by head space sampling, and the second response value v2 of the same concentration of gas is obtained by air bag sampling. Coefficient = v2 / v1. In this embodiment, two injection tests are performed using a gas of one concentration to obtain the coefficient used to correct the standard curve.

[0050] Next, after the six-way valve is controlled to rotate so that the standard gas in the six-way valve quantitative loop enters the chromatographic column, the detection data of the chromatographic column is extracted to make a standard curve of gas concentration and response value; the data on the standard curve is multiplied by a pre-calculated coefficient to obtain the standard curve of the standard gas during gas bag injection. The standard curve can be a linear curve or a nonlinear curve obtained by fitting the gas concentration and response value.

[0051] Compared with the prior art, this embodiment has the following technical effects:

[0052] 1. The present invention realizes the compatibility of the headspace sampler and the detector of the rapid detection equipment, that is, the early triggering of the sampler in the detector of the rapid detection equipment is realized, so that the pressurized standard gas in the headspace bottle is released in advance, the pressure of the injection process is reduced, and the normalized continuous injection of gas is realized. By adding a vacuum pump and injecting the pressurized inert gas into the six-way valve through the headspace bottle, the residual gas in the six-way valve is controlled to be discharged into the atmosphere, which solves the problem of pipeline residue during continuous injection.

[0053] 2. The present invention can greatly shorten the preparation time and injection cycle of standard gas. Among them, the sample preparation time can be shortened by 80%. The experimenter only needs to inject the standard gas of the specified concentration into the headspace bottle and write the sequence for analysis. There is no need to prepare the gas bag, flush a certain volume of gas, mix it thoroughly, and repeat the operation of the equipment for injection. Based on the average daily working hours of 8 hours for the staff (8 samples are analyzed manually every day, and 40 samples can be analyzed every day after the transformation), the standard gas injection cycle can be increased by 5 times by using the headspace sampler for continuous injection, and it is estimated that 70 days of labor costs will be saved each year.

[0054] 3. The present invention can reduce the error caused by human factors and enhance the accuracy of the test. When using headspace sampling, the calculation uncertainty only needs to inject the standard gas, while when using the odor bag, in addition to injecting the gas, it is also necessary to consider the gas filling volume, whether the sample is adsorbed, whether the sample is fully volatilized, whether the sample is evenly distributed, and whether the ambient temperature and air pressure have an impact, which will obviously increase the error and uncertainty.

[0055] 4. The present invention can significantly reduce the cost of consumables. When using a glass headspace bottle for sampling, after cleaning the headspace bottle, you only need to replace the headspace bottle cap to continue using it. However, the odor bag injected with liquid is mostly disposable, and the cleaning and aging of the odor bag are more complicated, costing tens to hundreds of yuan, and it is easy to have chemical residues, which affects the test results.

[0056] 5. This patent enables the database of rapid testing equipment to be adapted to multiple detectors, so that the detectors have higher consistency and versatility after mass production.

[0057] 6. The present invention can avoid the deviation of quantitative results caused by adsorption of odor bags, and can reduce the high manpower and time costs incurred in the curve establishment process through coefficient calculation.

[0058] Example 2

[0059] This embodiment provides a rapid sampling device for a rapid chemical detection device for automobile odor, see Figure 5 , the device includes: a controller, a rapid detection device detector, a headspace bottle and a suction pump;

[0060] The controller is connected to the rapid detection device detector, the six-way valve and the injection needle, and is used to control the injection needle to penetrate into the head space bottle at the initial moment, and start the vacuum pump, so that the standard gas in the head space bottle flows into the gas inlet and the quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve; after a set time period from the initial moment, the air pressure in the head space bottle reaches the ambient air pressure, the vacuum pump is controlled to be closed, and the rapid detection device detector is started; the six-way valve is controlled to rotate, so that the standard gas in the quantitative ring of the six-way valve enters the chromatographic column; after the rapid detection device detector completes gas detection, the six-way valve is controlled to rotate again, pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere.

[0061] Optional, Figure 5 The device also includes a solenoid valve; the solenoid valve is connected between the air pump and the outlet of the six-way solenoid valve; the solenoid valve is a two-position three-way valve, which is respectively connected to the outlet, the air pump and the atmosphere.

[0062] Optional, Figure 5 The device further includes a pressure sensor disposed in the headspace bottle. The controller calculates the difference between the air pressure in the headspace bottle and the ambient air pressure; and determines the set time required for the standard gas to be depressurized according to the pre-established correspondence between the difference and the set time. For details, see the description of Example 1, which will not be repeated here.

[0063] Optionally, the rapid sampling device of the automobile odor chemical rapid testing device also includes a clamp for the sampling needle ( Figure 5(not shown), the clamp includes a pair of calipers with a motor, and the controller drives the motor to clamp the calipers to hold the injection needle. The controller drives the calipers to move toward the headspace bottle, so that the injection needle is inserted into the headspace bottle. On the contrary, the controller drives the calipers away from the headspace bottle, so that the injection needle is pulled out of the headspace bottle. The calipers can be set on a displacement device (such as a movable table), and the controller drives the displacement device to move, thereby driving the calipers to move.

[0064] Optionally, the standard gas is a certain gas in the car, so as to obtain a standard curve of the gas in the car, which is conducive to the subsequent detection of the gas concentration in the car.

[0065] The rapid sampling device of the automobile odor chemical rapid detection device provided in this embodiment has the technical effects and technical details provided in Example 1, which will not be repeated here.

[0066] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A rapid sampling method for a rapid chemical detection device for automobile odor, characterized in that: include: At the initial moment, the injection needle is controlled to penetrate into the headspace bottle, and the vacuum pump is started, so that the standard gas in the headspace bottle flows into the gas inlet and the quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve; After a set time has passed since the initial moment, the air pressure in the headspace bottle reaches the ambient air pressure, the vacuum pump is controlled to be turned off, and the detector of the rapid testing device is started; Control the six-way valve to rotate so that the standard gas in the quantitative loop of the six-way valve enters the chromatographic column; extract the detection data of the chromatographic column and make a standard curve of gas concentration and response value; multiply the data on the standard curve by a pre-calculated coefficient to obtain the standard curve of the standard gas during air bag injection; the standard curve of the standard gas during air bag injection is used to analyze the concentration of the gas when the gas is collected by the air bag; wherein the coefficient is obtained by the following steps: obtain a first response value and a second response value by head space injection and air bag injection respectively for gases of the same concentration; determine the coefficient according to the ratio of the first response value to the second response value; After the rapid detection device detector completes the gas detection, the six-way valve is controlled to rotate again, pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere.

2. The method according to claim 1, characterized in that The outlet of the six-way valve flows into the air pump, including: The electromagnetic valve is controlled to connect the air pump with the outlet of the six-way valve, so that the standard gas flows into the air pump from the outlet of the six-way valve.

3. The method according to claim 2, characterized in that Controlling the residual gas in the six-way valve to be discharged to the atmosphere includes: The solenoid valve is controlled to connect the atmosphere with the outlet of the six-way valve so that the residual gas in the six-way valve is discharged to the atmosphere.

4. The method according to claim 1, characterized in that: After a set time has passed since the initial moment and before the air pressure in the headspace bottle reaches the ambient air pressure, the method further includes: The gas pressure in the headspace bottle is detected by a pressure sensor at the mouth of the headspace bottle; Calculate the difference between the air pressure in the headspace bottle and the ambient air pressure; The set time required for depressurizing the standard gas is determined according to the pre-established correspondence between the difference and the set time.

5. A rapid sampling device for a rapid chemical detection device for automobile odor, characterized in that: include: Controller, rapid test equipment detector, headspace bottle and vacuum pump; The controller is connected to the rapid detection device detector, the six-way valve and the injection needle, and is used to control the injection needle to penetrate into the headspace bottle at the initial moment, and start the vacuum pump, so that the standard gas in the headspace bottle flows into the gas inlet and quantitative ring of the six-way valve, and flows into the vacuum pump from the outlet of the six-way valve; after a set time period from the initial moment, the air pressure in the headspace bottle reaches the ambient air pressure, the vacuum pump is controlled to be closed, and the rapid detection device detector is started; the six-way valve is controlled to rotate, so that the standard gas in the quantitative ring of the six-way valve enters the chromatographic column; the detection data of the chromatographic column is extracted, and a standard curve of gas concentration and response value is prepared; the data on the standard curve are Multiply by the pre-calculated coefficient to obtain the standard curve of the standard gas during air bag sampling; the standard curve of the standard gas during air bag sampling is used to analyze the concentration of the gas when the gas is collected by the air bag; wherein the coefficient is obtained by the following steps: the same concentration of gas is sampled by head space sampling and air bag sampling to obtain a first response value and a second response value; the coefficient is determined according to the ratio of the first response value to the second response value; after the rapid detection equipment detector completes the gas detection, the six-way valve is controlled to rotate again, the pressurized inert gas is injected into the six-way valve, and the residual gas in the six-way valve is controlled to be discharged into the atmosphere.

6. The device according to claim 5, characterized in that Also included is a clamp for the injection needle; The controller drives the clamp to move so that the clamp drives the injection needle to pierce the head space bottle.

7. The device according to claim 5, characterized in that Also includes a solenoid valve; The solenoid valve is connected between the air pump and the outlet of the six-way solenoid valve; The solenoid valve is a two-position three-way valve, which is respectively connected to the outlet, the air pump and the atmosphere.

8. The device according to claim 5, characterized in that A pressure sensor is provided in the headspace bottle; The controller calculates the difference between the air pressure in the headspace bottle and the ambient air pressure; and determines the set time required for the standard gas to reduce the pressure according to the pre-established corresponding relationship between the difference and the set time.

9. The device according to claim 5, characterized in that The standard gas is a certain gas in the car.

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