CN117250308A - Gas collection and analysis device - Google Patents

Gas collection and analysis device Download PDF

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Publication number
CN117250308A
CN117250308A CN202310287858.XA CN202310287858A CN117250308A CN 117250308 A CN117250308 A CN 117250308A CN 202310287858 A CN202310287858 A CN 202310287858A CN 117250308 A CN117250308 A CN 117250308A
Authority
CN
China
Prior art keywords
cavity
gas
air
sensor
analysis device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310287858.XA
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Chinese (zh)
Inventor
刘攀
麦苑婷
郭立天
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Heneng Things Software Development Co ltd
Original Assignee
Foshan Heneng Things Software Development Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foshan Heneng Things Software Development Co ltd filed Critical Foshan Heneng Things Software Development Co ltd
Priority to CN202310287858.XA priority Critical patent/CN117250308A/en
Publication of CN117250308A publication Critical patent/CN117250308A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention provides a gas collection and analysis device which comprises a shell with an accommodating space, a baffle plate for dividing the accommodating space into a first cavity and a second cavity, a first gas sensor, an air pump, a second gas sensor and a reducing pipeline, wherein the baffle plate is arranged on the shell; the shell is respectively provided with a first air inlet, a second air inlet and an air outlet which penetrate through the shell; the air pump is used for sucking external air into the first cavity so that the first air sensor can acquire data; the gas in the first cavity flows out through the gas outlet end of the reducing pipeline to form first gas and enters the second cavity; in the second cavity, the first gas enters to enable the outside gas to be sucked into the second cavity through the second air inlet, and the second gas sensor is used for collecting data in the second cavity. The second gas is used for the second gas sensor to collect data. Compared with the related art, the data detection accuracy of the gas acquisition and analysis device is high.

Description

Gas collection and analysis device
Technical Field
The invention relates to the technical field of gas detection, in particular to a gas collection and analysis device.
Background
In recent years, environmental requirements are increasing, and in particular, requirements for detection of PM2.5, PM10, etc. in air are increasing. Detection for various gas detection is one of the important technologies.
The gas collection and analysis device of the related art generally adopts a gas sensor and a processor for analysis, and adopts a gas detection device for detection of a gas. The gas collection and analysis device of the related art generally comprises a housing having a housing space, an air inlet and an air outlet penetrating the housing space respectively, a partition plate dividing the housing space into a first cavity and a second cavity, a plurality of gas sensors arranged in the first cavity and the second cavity, an air pump mounted in the housing, and a second gas sensor arranged in the second cavity.
However, the gas collection and analysis device for simultaneously detecting multiple gases sequentially flows outside air through the air inlet, the first cavity, the second cavity and the air outlet by adopting the air pump, and then is discharged to the outside through the air outlet. When the gas flow detected by the gas sensor in the first cavity enters the second cavity, the ratio of the gas components to be detected in the air changes, and the ratio of the gas components to be detected in the outside air cannot be accurately represented, so that the data detected by the gas sensor in the second cavity are inaccurate.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a gas collection and analysis device which can detect a plurality of types of gases and has high detection accuracy.
In order to solve the technical problems, an embodiment of the present invention provides a gas collecting and analyzing device, which includes a housing having an accommodating space, a partition plate dividing the accommodating space into a first cavity and a second cavity, a first gas sensor disposed in the first cavity, an air pump mounted in the housing, and a second gas sensor and a reducing pipeline disposed in the second cavity, respectively; the shell is respectively provided with a first air inlet, a second air inlet and an air outlet which penetrate through the shell; the first cavity is communicated with the outside through the first air inlet and the air pump in sequence, and the second cavity is communicated with the outside through the second air inlet and the air outlet respectively;
the air inlet end of the air pump is exposed out of the shell, the air outlet end of the air pump is communicated with the first air inlet, and the air pump is used for sucking external air into the first cavity so that the first air sensor can acquire data;
the air inlet end of the reducing pipeline is communicated with the first cavity, the air outlet end of the reducing pipeline is arranged adjacent to the second air inlet, and the air in the first cavity flows out through the air outlet end of the reducing pipeline to form first air and enters the second cavity; and in the second cavity, the first gas enters to enable the outside gas to be sucked into the second cavity through the second air inlet, and the second gas sensor is used for collecting data in the second cavity.
Preferably, the cross-sectional area of the side of the variable diameter pipe communicating with the first cavity is larger than the cross-sectional area of the side of the variable diameter pipe communicating with the second cavity.
Preferably, the reducing pipeline comprises a first section communicated with the first cavity, a second section extending from the first section and a third section extending from the second section to a direction away from the first section, an air inlet end of the reducing pipeline is arranged on the first section, an air outlet end of the reducing pipeline is arranged on the third section, and the sectional area of the first section is larger than that of the third section.
Preferably, the third sections include two, two third sections are disposed side by side, and a sum of sectional areas of the two third sections is smaller than a sectional area of the first section.
Preferably, the first gas sensor is provided with a plurality of gas sensors, and the first gas sensor is one or more of a VOC sensor, a TVOC sensor, a gas pressure sensor and a temperature and humidity sensor.
Preferably, the second gas sensor is a PM10 sensor and/or a PM2.5 sensor.
Preferably, the first gas sensor and the second gas sensor are both fixed to the separator.
Preferably, the shell comprises an upper cover, a lower cover, a cover plate and a pressing lock, wherein the cover is fixed on the upper cover, the lower cover and the upper cover jointly enclose the accommodating space, the cover plate is arranged on the lower cover, the pressing lock is installed on the upper cover, the partition plate is used for fixing the lower cover, the cover plate is used for preventing water, and the pressing lock is used for locking or unlocking the cover plate in the lower cover.
Preferably, the gas collecting and analyzing device further comprises a display arranged on the outer side of the shell and a processor fixed in the accommodating space, and the processor is respectively and electrically connected with the display, the first gas sensor and the second gas sensor.
The invention has the beneficial effects that: the invention provides a gas collecting and analyzing device, which divides an accommodating space in a shell into a first cavity and a second cavity by a baffle plate, wherein a first gas sensor is arranged in the first cavity, and a second gas sensor is arranged in the second cavity. The structure enables the gas collection and analysis device to be capable of detecting various kinds of gas. The gas collection and analysis device is used for sucking the external gas into the first cavity through the gas pump so as to enable the first gas sensor to collect data, and therefore the data accuracy of the data collected by the first gas sensor is high; the gas in the first cavity flows out to form first gas and enters the second cavity through the reducing pipeline, the air pressure of the flowing first gas close to the second air inlet is smaller than the external air pressure, the external gas is sucked into the second cavity through the second air inlet according to the Bernoulli principle, and the second gas is used for collecting data in the second cavity; the structure avoids the air collected by the gas collection and analysis device in the related art to be the air after multiple detection, the gas component ratio to be detected in the collected air changes and cannot accurately represent the gas component ratio to be detected in the outside air, the gas in the second cavity for collecting data by the second gas sensor is the gas inhaled by the outside, and the gas in the second cavity can accurately represent the gas component ratio to be detected in the outside air, so that the data accuracy for collecting data by the second gas sensor is high. Therefore, the gas collection and analysis device has high accuracy of data detection.
Drawings
The present invention will be described in detail with reference to the accompanying drawings. The foregoing and other aspects of the invention will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings. In the accompanying drawings:
FIG. 1 is a schematic perspective view of a gas collection and analysis device according to the present invention;
FIG. 2 is a partially exploded perspective view of a gas collection and analysis device according to the present invention;
FIG. 3 is an anatomical schematic view of line A-A of FIG. 1;
FIG. 4 is a diagram showing electrical connections between partial modules of the gas collection and analysis device of the present invention;
fig. 5 is a schematic perspective view of a reducing pipeline of the gas collecting and analyzing device of the present invention.
Detailed Description
The following describes in detail the embodiments of the present invention with reference to the drawings.
The detailed description/examples set forth herein are specific embodiments of the invention and are intended to be illustrative and exemplary of the concepts of the invention and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein, all within the scope of the present invention.
The invention provides a gas collection and analysis device 100. The gas collection and analysis device 100 is used for simultaneously detecting various gas indexes, such as a PM2.5 index, a PM10 index, a VOC index, a gas pressure index and the like.
Referring to fig. 1-4, fig. 1 is a schematic perspective view of a gas collection and analysis device 100 according to the present invention; FIG. 2 is a partially exploded perspective view of a gas collection and analysis device 100 according to the present invention; FIG. 3 is an anatomical schematic view of line A-A of FIG. 1; fig. 4 is a diagram showing electrical connection relationship between partial modules of the gas collection and analysis device 100 according to the present invention.
Specifically, the gas collecting and analyzing device 100 includes a housing 1, a partition board 2, a first gas sensor 3, an air pump 4, a second gas sensor 5, a reducing pipeline 6, a display 7 and a processor 8.
The housing 1 has an accommodation space 10. The partition plate 2 divides the accommodating space 10 into a first cavity 101 and a second cavity 102. The structure of the partition board 2 separating the accommodating space 10 is selected according to actual design requirements, and will not be described in detail herein.
The housing 1 includes an upper cover 14, a lower cover 15 that is fixed to the upper cover 14 and encloses the accommodating space 10 together with the upper cover 14, a cover plate 16 that is provided to the lower cover 15, and a lock 17 that is mounted to the upper cover 14. Wherein the cover plate 16 is used for waterproofing. The cover plate 16 for waterproofing is installed in the housing 1, which is advantageous for waterproofing of the electric components in the housing space 10, such as the first gas sensor 3, the air pump 4, the second gas sensor 5, the display 7 and the processor 8, thereby being advantageous for improving the reliability of the gas collection and analysis device 100.
The push lock 17 is used to lock or unlock the cover plate 16 in the lower cover 15. That is, the cover 16 is opened by the push lock 17. It should be noted that the mechanical structures of the push lock 17 and the cover plate 16 are common in the art, and the specific structure and shape are selected according to practical design, and will not be described in detail herein.
The housing 1 is further provided with a first air inlet 11, a second air inlet 12 and an air outlet 13 penetrating therethrough, respectively. The first cavity 101 is communicated with the outside through the first air inlet 11 and the air pump 4 in sequence; the second cavity 102 communicates with the outside through the second air inlet 12 and the air outlet 13, respectively.
The exhaust port 13 includes a plurality of exhaust ports. The structure of the first air inlet 11, the second air inlet 12 and the plurality of air outlets 13 is beneficial to the air exchange efficiency of the housing 1, and is beneficial to the temperature heat dissipation in the housing 1, thereby improving the reliability of the gas collection and analysis device 100.
In this embodiment, the number of the exhaust ports 13 includes 4, and each two exhaust ports 13 are symmetrically disposed on opposite sides of the housing 1 at intervals. The two air inlets for air intake, namely the first air inlet 11 and the second air inlet 12, are provided with 4 symmetrically distributed air outlets 13 at the same time, so that the air in the shell 1 can be efficiently exchanged with the outside, and the temperature reduction in the shell 1 is realized. Of course, the number and specific positions of the exhaust ports 13 may be selected according to design criteria, and detailed descriptions thereof are omitted herein.
In this embodiment, the partition board 2 fixes the lower cover 15.
The first gas sensor 3 is disposed in the first cavity 101. Specifically, the first gas sensor 3 is fixed to the separator 2.
The first gas sensor 3 is provided in plurality. In this embodiment, the number of the first gas sensors 3 is three.
The first gas sensor 3 is one or more of a VOC sensor, a TVOC sensor, a gas pressure sensor and a temperature and humidity sensor. In another embodiment, the first gas sensor 3 further includes a nitrogen dioxide sensor, an ozone sensor, a hydrogen sulfide sensor, a methyl sensor, a carbon monoxide sensor, and a sulfur dioxide sensor, which are not limited to this, and the selection of the types and numbers of the specific sensors is selected according to the actual design requirements of the gas collection and analysis device 100, and will not be described in detail herein.
The air pump 4 is mounted to the housing 1.
Specifically, the air inlet end of the air pump 4 is exposed to the housing 1, and the air outlet end of the air pump 4 is communicated with the first air inlet 11. The air pump 4 is used for sucking the external air into the first cavity 101 so that the first air sensor 3 can collect data. The structure ensures that the data acquisition accuracy of the first gas sensor 3 is high.
The second gas sensor 5 is disposed in the second cavity 102. Specifically, the second gas sensor 5 is fixed to the separator 2. The second gas sensor 5 is configured to collect data in the second cavity 102.
The second gas sensor 5 is provided in plurality. The second gas sensor 5 is one or two of a PM10 sensor and a PM2.5 sensor. In this embodiment, the second gas sensor is a PM10 sensor and/or a PM2.5 sensor, so as to solve the problem of inaccurate PM10 index and/or PM2.5 index detection in pump-intake gas detection.
The variable diameter pipe 6 is disposed in the second cavity 102. In this embodiment, the reducing pipe 6 is fixed to the lower cover 15.
The air inlet end of the reducing pipeline 6 is communicated with the first cavity 101, and the air outlet end of the reducing pipeline 6 is arranged adjacent to the second air inlet 12.
The gas in the first cavity 101 flows through the gas outlet end of the reducing pipeline 6 to form a first gas, and the first gas flows into the second cavity 102, the gas pressure of the first gas flowing out near the second gas inlet 12 is smaller than the external gas pressure, the external gas is sucked into the second cavity 102 through the second gas inlet 12 according to the bernoulli principle, and a second gas is formed, and is used for the second gas sensor 5 to collect data. The structure makes full use of the fact that the air in the first cavity 101 flows through the reducing pipeline 6 to form high-speed air flow, and then the high-speed air flow is utilized to cause the air pressure at the position of the second air inlet 12 in the second cavity 102 to be low, so that the air outside the shell 1 is sucked into the second cavity 102 through the second air inlet 12.
Referring to fig. 5, fig. 5 is a schematic perspective view of a reducing pipe 6 of the gas collecting and analyzing apparatus 100 according to the present invention. In this embodiment, the reducing pipe 6 is a pipe structure applying the bernoulli principle, and specifically, a cross-sectional area of a side of the reducing pipe 6, which communicates with the first cavity 101, is larger than a cross-sectional area of a side of the reducing pipe 6, which communicates with the second cavity 102. This structure makes full use of bernoulli's principle such that a high-velocity gas flow is formed through the variable diameter pipe 6 by the gas of the first cavity 101. Of course, the present invention is not limited thereto, and any other means for realizing the low air pressure of the second air intake port 12 may be used. In another embodiment, a drainage fan or another air pump is disposed at the air inlet end of the reducing pipeline 6, and the drainage fan or the air pump is located in the first cavity 101 or the second cavity 102, and guides or pumps the air in the first cavity 101 into the reducing pipeline 6, so that the reducing pipeline 6 is facilitated to form high-speed air flow, and the detection effect is better.
Specifically, the reducing pipe 6 includes a first section 61 that communicates with the first cavity 101, a second section 62 that extends from the first section 61, and a third section 63 that extends from the second section 62 in a direction away from the first section 61, an air inlet end of the reducing pipe 6 is disposed in the first section 61, an air outlet end of the reducing pipe 6 is disposed in the third section 63, and a cross-sectional area of the first section 61 is larger than a cross-sectional area of the third section 63. This configuration facilitates the use of Bernoulli's principle by the variable diameter conduit 6 to achieve a high velocity gas flow of the gas of the first cavity 101 through the variable diameter conduit 6.
In order to better achieve a low air pressure in the second air inlet 12, the third section 63 comprises two. Two of said third sections 63 are arranged side by side. The sum of the cross-sectional areas of the two third sections 63 is smaller than the cross-sectional area of the first section 61. The structure also enables the second gas to be more quickly and stably diffused after entering from the outside through the second gas inlet 12, so that the data accuracy of the data collected by the second gas sensor 5 is high.
The display 7 is mounted outside the housing 1. The display 7 can view the detection result in real time, which is beneficial to improving the detection efficiency of the gas collection and analysis device 100.
The processor 8 is fixed in the accommodating space 10. The processor 8 is electrically connected to the display 7, the first gas sensor 3 and the second gas sensor 5, respectively. The processor 8 is configured to analyze the acquired data of the first gas sensor 3 and the second gas sensor 5.
In this embodiment, the first gas sensor 3, the air pump 4, the second gas sensor 5, the display 7 and the processor 8 are all powered by an external power supply. Of course, without limitation, in another embodiment, the power supply is implemented using a built-in battery. The battery is fixed in the accommodating space 10. More preferably, the battery is a rechargeable battery. The use of the battery is advantageous in downsizing and portability of the gas collection and analysis device 100.
In the present invention, the present invention provides a gas collection and analysis device 100, wherein a partition plate 2 is provided to divide an accommodation space 10 in a housing 1 into a first cavity 101 and a second cavity 102, a first gas sensor 3 is provided in the first cavity 101, and a second gas sensor 5 is provided in the second cavity 102. This structure allows the gas collection and analysis device 100 of the present invention to be used in a wide variety of gas detection. The gas collection and analysis device 100 is used for sucking external gas into the first cavity 101 through the gas pump 4 so as to enable the first gas sensor 3 to collect data, and therefore the data accuracy of the data collected by the first gas sensor 3 is high; the reducing pipeline 6 is arranged to enable the gas in the first cavity 101 to flow out to form first gas and enter the second cavity 102, the air pressure of the first gas flowing out, which is close to the second air inlet 12, is smaller than the external air pressure, the external gas is sucked into the second cavity 102 through the second air inlet 12 according to the Bernoulli principle, and the second gas sensor 5 is used for collecting data in the second cavity 102; the structure avoids the air collected by the gas collection and analysis device in the related art to be the air after multiple detection, the gas component ratio to be detected in the collected air changes and cannot accurately represent the gas component ratio to be detected in the outside air, the gas in the second cavity 102 for collecting data by the second gas sensor 5 is the gas inhaled by the outside, and the gas in the second cavity 102 can accurately represent the gas component ratio to be detected in the outside air, so that the data accuracy for collecting data by the second gas sensor 5 is high. Therefore, the gas collection and analysis device 100 of the present invention has high accuracy of data detected.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims (9)

1. The gas collection and analysis device is characterized by comprising a shell with an accommodating space, a baffle plate for dividing the accommodating space into a first cavity and a second cavity, a first gas sensor arranged in the first cavity, an air pump arranged in the shell, and a second gas sensor and a reducing pipeline which are respectively arranged in the second cavity; the shell is respectively provided with a first air inlet, a second air inlet and an air outlet which penetrate through the shell; the first cavity is communicated with the outside through the first air inlet and the air pump in sequence, and the second cavity is communicated with the outside through the second air inlet and the air outlet respectively;
the air inlet end of the air pump is exposed out of the shell, the air outlet end of the air pump is communicated with the first air inlet, and the air pump is used for sucking external air into the first cavity so that the first air sensor can acquire data;
the air inlet end of the reducing pipeline is communicated with the first cavity, the air outlet end of the reducing pipeline is arranged adjacent to the second air inlet, and the air in the first cavity flows out through the air outlet end of the reducing pipeline to form first air and enters the second cavity;
and in the second cavity, the first gas enters to enable the outside gas to be sucked into the second cavity through the second air inlet, and the second gas sensor is used for collecting data in the second cavity.
2. The gas collection and analysis device according to claim 1, wherein a cross-sectional area of a side of the variable diameter pipe communicating with the first cavity is larger than a cross-sectional area of a side of the variable diameter pipe communicating with the second cavity.
3. The gas collection and analysis device according to claim 2, wherein the reducing pipe includes a first section communicating with the first cavity, a second section extending from the first section, and a third section extending from the second section in a direction away from the first section, an air inlet end of the reducing pipe is disposed in the first section, an air outlet end of the reducing pipe is disposed in the third section, and a cross-sectional area of the first section is larger than a cross-sectional area of the third section.
4. A gas collection and analysis device according to claim 3 wherein the third section comprises two, the two third sections being arranged side by side, the sum of the cross-sectional areas of the two third sections being smaller than the cross-sectional area of the first section.
5. The gas collection and analysis device according to claim 1, wherein the first gas sensor is one or more of a VOC sensor, a TVOC sensor, a barometric sensor, and a temperature and humidity sensor.
6. The gas collection and analysis device according to claim 1, wherein the second gas sensor is a PM10 sensor and/or a PM2.5 sensor.
7. The gas collection and analysis device of claim 1, wherein the first gas sensor and the second gas sensor are each fixed to the separator.
8. The gas collection and analysis device according to claim 1, wherein the housing includes an upper cover, a lower cover having a cover fixed to the upper cover and enclosing the accommodation space together with the upper cover, a cover plate having a cover provided to the lower cover, and a press lock mounted to the upper cover, the partition plate fixing the lower cover, the cover plate being for waterproofing, the press lock being for locking or unlocking the cover plate in the lower cover.
9. The gas collection and analysis device according to claim 1, further comprising a display mounted on the outside of the housing and a processor secured within the receiving space, the processor being electrically connected to the display, the first gas sensor, and the second gas sensor, respectively.
CN202310287858.XA 2023-03-23 2023-03-23 Gas collection and analysis device Pending CN117250308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310287858.XA CN117250308A (en) 2023-03-23 2023-03-23 Gas collection and analysis device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310287858.XA CN117250308A (en) 2023-03-23 2023-03-23 Gas collection and analysis device

Publications (1)

Publication Number Publication Date
CN117250308A true CN117250308A (en) 2023-12-19

Family

ID=89131950

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310287858.XA Pending CN117250308A (en) 2023-03-23 2023-03-23 Gas collection and analysis device

Country Status (1)

Country Link
CN (1) CN117250308A (en)

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