A gas collection and analysis device

Abstract

This invention provides a gas collection and analysis device, comprising a housing with a receiving space, a partition dividing the receiving space into a first cavity and a second cavity, a first gas sensor, an air pump, a second gas sensor, and a variable-diameter pipe; the housing is respectively provided with a first air inlet, a second air inlet, and an exhaust outlet; the air pump is used to draw in external gas into the first cavity so that the first gas sensor can collect data; the gas in the first cavity flows out through the outlet end of the variable-diameter pipe to form a first gas and enters the second cavity; in the second cavity, the entry of the first gas causes external gas to be drawn into the second cavity through the second air inlet, and the second gas sensor is used to collect data in the second cavity. The second gas is used for the second gas sensor to collect data. Compared with related technologies, the gas collection and analysis device of this invention has high data accuracy.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to a gas collection and analysis device. Background Technology

[0002] In recent years, people have had increasingly higher requirements for the environment, especially for the detection of PM2.5 and PM10 in the air. Detection of various gases is an important technology in this regard.

[0003] Gas acquisition and analysis devices of related technologies generally employ gas sensors and processors for analysis, using a single gas detection device for each gas. Gas acquisition and analysis devices of related technologies that simultaneously detect multiple gases typically include a housing with a containment space, an inlet and an outlet penetrating the housing, a partition dividing the containment space into a first cavity and a second cavity, multiple gas sensors disposed within the first cavity and the second cavity, an air pump installed in the housing, and a second gas sensor disposed within the second cavity.

[0004] However, in gas sampling and analysis devices that simultaneously detect multiple gases, an air pump sequentially draws outside air through the air inlet, the first cavity, the second cavity, and the exhaust port before expelling it to the outside. When the gas flow from the gas sensor in the first cavity enters the second cavity, the proportion of the gases to be detected in the air changes, making it inaccurate to represent the proportion of the gases to be detected in the outside air. This results in inaccurate data detected by the gas sensor in the second cavity. Summary of the Invention

[0005] To address the shortcomings of the existing technologies, this invention proposes a gas collection and analysis device that can detect a wide variety of gases with high accuracy.

[0006] To address the aforementioned technical problems, this invention provides a gas collection and analysis device. The device includes a housing with a receiving space, a partition dividing the receiving space into a first cavity and a second cavity, a first gas sensor disposed within the first cavity, an air pump installed in the housing, and a second gas sensor and a variable-diameter pipe respectively disposed within the second cavity. The housing is provided with a first air inlet, a second air inlet, and an exhaust outlet. The first cavity is connected to the outside via the first air inlet and the air pump, and the second cavity is connected to the outside via the second air inlet and the exhaust outlet.

[0007] The air pump's inlet end is exposed outside the housing, and the air pump's outlet end is connected to the first air inlet. The air pump is used to draw external gas into the first cavity so that the first gas sensor can collect data.

[0008] The inlet end of the variable diameter pipe is connected to the first cavity, and the outlet end of the variable diameter pipe is adjacent to the second inlet. The gas in the first cavity flows out through the outlet end of the variable diameter pipe to form a first gas and enters the second cavity. In the second cavity, the entry of the first gas causes external gas to be drawn into the second cavity through the second inlet. The second gas sensor is used to collect data in the second cavity.

[0009] Preferably, the cross-sectional area of ​​the side of the variable diameter pipe that communicates with the first cavity is greater than the cross-sectional area of ​​the side of the variable diameter pipe that communicates with the second cavity.

[0010] Preferably, the variable diameter 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 away from the first section. The air inlet of the variable diameter pipe is located in the first section, and the air outlet of the variable diameter pipe is located in the third section. The cross-sectional area of ​​the first section is larger than that of the third section.

[0011] Preferably, the third segment comprises two segments arranged side by side, and the sum of the cross-sectional areas of the two segments is less than the cross-sectional area of ​​the first segment.

[0012] Preferably, the first gas sensor is provided in multiple forms, and the first gas sensor is one or more of the following: VOC sensor, TVOC sensor, air pressure sensor, and temperature and humidity sensor.

[0013] Preferably, the second gas sensor is a PM10 sensor and / or a PM2.5 sensor.

[0014] Preferably, both the first gas sensor and the second gas sensor are fixed to the partition.

[0015] Preferably, the housing includes an upper cover, a lower cover fixed to the upper cover and forming the receiving space together with the upper cover, a cover plate on the lower cover, and a push lock installed on the upper cover. The partition plate fixes the lower cover, the cover plate is used for waterproofing, and the push lock is used to lock or unlock the cover plate in the lower cover.

[0016] Preferably, the gas collection and analysis device further includes a display mounted on the outside of the housing and a processor fixed in the containment space, wherein the processor is electrically connected to the display, the first gas sensor and the second gas sensor respectively.

[0017] The beneficial effects of this invention are as follows: This invention provides a gas collection and analysis device. The device divides the internal space of its housing into a first cavity and a second cavity using a partition. A first gas sensor is installed in the first cavity, and a second gas sensor is installed in the second cavity. This structure allows the gas collection and analysis device of this invention to detect a wide variety of gases. The gas sampling and analysis device of this invention uses an air pump to draw in external gas into the first cavity, enabling the first gas sensor to collect data, thus ensuring high accuracy of the data collected by the first gas sensor. Then, a variable-diameter pipe is used to drain the gas from the first cavity, forming a first gas that enters the second cavity. The pressure of the first gas near the second inlet is lower than the external pressure. According to Bernoulli's principle, external gas is drawn into the second cavity through the second inlet, and this second gas is used to collect data within the second cavity. This structure avoids the problem of related gas sampling and analysis devices collecting air after multiple tests, where the proportion of the gas components to be detected in the collected air changes and cannot accurately represent the proportion of the gas components to be detected in the external air. In contrast, the gas in the second cavity, where the second gas sensor collects data, is the externally drawn-in gas, which accurately represents the proportion of the gas components to be detected in the external air, thus ensuring high accuracy of the data collected by the second gas sensor. Therefore, the gas sampling and analysis device of this invention provides highly accurate data. Attached Figure Description

[0018] The present invention will now be described in detail with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and more readily understood through the detailed description following the accompanying drawings. In the drawings:

[0019] Figure 1 This is a three-dimensional structural diagram of the gas collection and analysis device of the present invention;

[0020] Figure 2 This is a partially exploded three-dimensional structural diagram of the gas collection and analysis device of the present invention;

[0021] Figure 3 for Figure 1 Anatomical diagram of the AA line in the diagram;

[0022] Figure 4 This is a diagram showing the electrical connections of some modules of the gas collection and analysis device of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the variable-diameter pipe of the gas collection and analysis device of the present invention. Detailed Implementation

[0024] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] The specific embodiments / examples described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of the present invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein, all of which are within the protection scope of the present invention.

[0026] This invention provides a gas collection and analysis device 100. The gas collection and analysis device 100 is used to simultaneously detect multiple gas indicators, such as PM2.5, PM10, VOCs, and air pressure.

[0027] Please also refer to Figure 1-4 As shown, Figure 1 This is a three-dimensional structural schematic diagram of the gas collection and analysis device 100 of the present invention; Figure 2 This is a partial three-dimensional exploded view of the gas collection and analysis device 100 of the present invention; Figure 3 for Figure 1 Anatomical diagram of the AA line in the diagram; Figure 4 This is a diagram showing the electrical connections of some modules of the gas collection and analysis device 100 of the present invention.

[0028] Specifically, the gas collection and analysis device 100 includes a housing 1, a partition 2, a first gas sensor 3, a gas pump 4, a second gas sensor 5, a variable diameter pipe 6, a display 7, and a processor 8.

[0029] The housing 1 has a receiving space 10. The partition 2 divides the receiving space 10 into a first cavity 101 and a second cavity 102. The structure by which the partition 2 divides the receiving space 10 is selected according to actual design requirements, and will not be described in detail here.

[0030] The housing 1 includes an upper cover 14, a lower cover 15 fixed to the upper cover 14 and forming the receiving space 10 together with the upper cover 14, a cover plate 16 covering the lower cover 15, and a push-lock 17 installed on the upper cover 14. The cover plate 16 is used for waterproofing. Installing the waterproof cover plate 16 in the housing 1 helps to protect the electrical components within the receiving space 10 from water damage, such as the first gas sensor 3, the gas pump 4, the second gas sensor 5, the display 7, and the processor 8, thereby improving the reliability of the gas collection and analysis device 100.

[0031] The push-lock 17 is used to lock or unlock the cover plate 16 within the lower cover 15. In other words, the cover plate 16 is opened via the push-lock 17. It should be noted that the mechanical structure of the push-lock 17 and the cover plate 16 is a commonly used mechanical structure in the art; the specific structure and shape are selected based on actual design, and will not be described in detail here.

[0032] The housing 1 is further provided with a first air inlet 11, a second air inlet 12, and an exhaust outlet 13 passing through it. The first cavity 101 is connected to the outside through the first air inlet 11 and the air pump 4 in sequence; the second cavity 102 is connected to the outside through the second air inlet 12 and the exhaust outlet 13 in sequence.

[0033] The exhaust ports 13 include multiple ports. The structure of the first air inlet 11, the second air inlet 12, and the multiple exhaust ports 13 is beneficial to the gas exchange efficiency of the housing 1 and also beneficial to the heat dissipation inside the housing 1, thereby improving the reliability of the gas collection and analysis device 100.

[0034] In this embodiment, there are four exhaust ports 13, with each pair of exhaust ports 13 symmetrically arranged on opposite sides of the housing 1 at intervals. Two air inlets, namely the first air inlet 11 and the second air inlet 12, along with the four symmetrically distributed exhaust ports 13, allow for efficient gas exchange between the interior of the housing 1 and the outside environment, thus achieving cooling of the interior of the housing 1. Of course, this is not the only option; the number and specific location of the exhaust ports 13 can be selected according to design specifications, which will not be elaborated upon here.

[0035] In this embodiment, the partition 2 fixes the lower cover 15.

[0036] The first gas sensor 3 is disposed within the first cavity 101. Specifically, the first gas sensor 3 is fixed to the partition 2.

[0037] The first gas sensor 3 is provided in multiple ways. In this embodiment, there are three first gas sensors 3.

[0038] The first gas sensor 3 is one or more of a VOC sensor, a TVOC sensor, a 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. Of course, it is not limited to these. The selection of the specific type and number of sensors is based on the actual design requirements of the gas collection and analysis device 100, and will not be described in detail here.

[0039] The air pump 4 is installed in the housing 1.

[0040] Specifically, the air inlet of the air pump 4 is exposed outside the housing 1, and the air outlet of the air pump 4 is connected to the first air inlet 11. The air pump 4 is used to draw in external gas into the first cavity 101 so that the first gas sensor 3 can collect data. This structure makes the data collected by the first gas sensor 3 highly accurate.

[0041] The second gas sensor 5 is disposed within the second cavity 102. Specifically, the second gas sensor 5 is fixed to the partition 2. The second gas sensor 5 is used to collect data within the second cavity 102.

[0042] Multiple second gas sensors 5 are provided. The second gas sensor 5 is one or both of PM10 and PM2.5 sensors. In this embodiment, the second gas sensor is a PM10 sensor and / or a PM2.5 sensor to solve the problem of inaccurate detection of PM10 and / or PM2.5 indicators in pump-assisted gas detection.

[0043] The variable diameter pipe 6 is disposed within the second cavity 102. In this embodiment, the variable diameter pipe 6 is fixed to the lower cover 15.

[0044] The air inlet of the variable diameter pipe 6 is connected to the first cavity 101, and the air outlet of the variable diameter pipe 6 is arranged adjacent to the second air inlet 12.

[0045] The gas in the first cavity 101 flows out through the outlet of the variable diameter pipe 6 to form a first gas and enters the second cavity 102. The pressure of the first gas flowing out near the second inlet 12 is lower than the external pressure. According to Bernoulli's principle, the external gas is drawn into the second cavity 102 through the second inlet 12 and forms a second gas. The second gas is used by the second gas sensor 5 to collect data. This structure fully utilizes the high-speed airflow formed by the gas flowing through the variable-diameter pipe 6 in the first cavity 101. This high-speed airflow then creates a low air pressure at the second air inlet 12 within the second cavity 102, causing gas outside the housing 1 to be drawn into the second cavity 102 through the second air inlet 12. This structure avoids the situation where the air detected by the second gas sensor 5 in the second cavity 102 is solely the first gas detected in the first cavity 101. After detection by the first gas sensor 3, the composition of the outside air changes and cannot accurately represent the proportion of the gas components to be detected in the outside air. The second gas, however, is directly replenished from the outside without passing through the first cavity 101, and it is essentially the same as the outside gas. For example, the PM2.5 and PM10 content in the second gas is consistent with the outside air. The second gas can accurately represent the proportion of the gas components to be detected in the outside air, thus ensuring high data accuracy for the second gas sensor 5.

[0046] Please refer to Figure 5 As shown, Figure 5 This is a three-dimensional structural diagram of the variable-diameter pipe 6 of the gas collection and analysis device 100 of the present invention. In this embodiment, the variable-diameter pipe 6 is a pipe structure applying Bernoulli's principle. Specifically, the cross-sectional area of ​​the side of the variable-diameter pipe 6 communicating with the first cavity 101 is larger than the cross-sectional area of ​​the side of the variable-diameter pipe 6 communicating with the second cavity 102. This structure fully utilizes Bernoulli's principle to enable the gas in the first cavity 101 to form a high-speed airflow through the variable-diameter pipe 6. Of course, it is not limited to this; other devices that achieve low air pressure at the second air inlet 12 can also be used. In another embodiment, a diversion fan or another air pump is provided at the air inlet end of the variable-diameter pipe 6. The diversion fan or air pump is located inside the first cavity 101 or the second cavity 102, and diverts or pumps the gas in the first cavity 101 into or into the variable-diameter pipe 6, thereby facilitating the formation of a high-speed airflow in the variable-diameter pipe 6 and improving the detection effect.

[0047] Specifically, the variable-diameter pipe 6 includes a first section 61 communicating with the first cavity 101, a second section 62 extending from the first section 61, and a third section 63 extending from the second section 62 away from the first section 61. The air inlet of the variable-diameter pipe 6 is located in the first section 61, and the air outlet of the variable-diameter pipe 6 is located in the third section 63. The cross-sectional area of ​​the first section 61 is larger than the cross-sectional area of ​​the third section 63. This structure facilitates the use of Bernoulli's principle to enable the gas in the first cavity 101 to form a high-speed airflow through the variable-diameter pipe 6.

[0048] To better achieve low air pressure at the second air inlet 12, the third segment 63 comprises two sections. These two third segments 63 are arranged side-by-side. The sum of the cross-sectional areas of the two third segments 63 is less than the cross-sectional area of ​​the first segment 61. This structure also allows the second gas to diffuse more quickly and stably after entering from the outside through the second air inlet 12, resulting in high data accuracy from the second gas sensor 5.

[0049] The display 7 is mounted on the outside of the housing 1. The display 7 allows for real-time viewing of the detection results, which helps improve the detection efficiency of the gas collection and analysis device 100.

[0050] The processor 8 is fixed within the receiving 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 used to analyze the data collected by the first gas sensor 3 and the second gas sensor 5.

[0051] In this embodiment, the first gas sensor 3, the gas pump 4, the second gas sensor 5, the display 7, and the processor 8 are all powered by an external power source. However, this is not the only embodiment; in another embodiment, a built-in battery is used for power supply. The battery is fixed within the housing space 10. More preferably, the battery is a rechargeable battery. The use of a battery facilitates the miniaturization and portability of the gas collection and analysis device 100.

[0052] This invention provides a gas collection and analysis device 100. The device 100 divides the internal space 10 of the housing 1 into a first cavity 101 and a second cavity 102 by a partition 2. A first gas sensor 3 is disposed in the first cavity 101, and a second gas sensor 5 is disposed in the second cavity 102. This structure allows the gas collection and analysis device 100 to detect a wide variety of gases. The gas collection and analysis device 100 of the present invention uses an air pump 4 to draw in external gas into the first cavity 101, so that the first gas sensor 3 can collect data, thereby making the data collected by the first gas sensor 3 highly accurate. Then, the gas in the first cavity 101 flows out through a variable diameter pipe 6 to form a first gas and enter the second cavity 102. The pressure of the first gas flowing out near the second air inlet 12 is lower than the external air pressure. According to Bernoulli's principle, the external gas is drawn into the second cavity 102 through the second air inlet 12. The second gas sensor 5 is used to collect data in the second cavity 102. This structure avoids the situation where the air collected by the gas collection and analysis device of the related technology is air that has been tested multiple times. The proportion of the gas components to be detected in the collected air has changed and cannot accurately represent the proportion of the gas components to be detected in the external air. However, the gas in the second cavity 102 collected by the second gas sensor 5 is the gas drawn in from the outside. The gas in the second cavity 102 can accurately represent the proportion of the gas components to be detected in the external air, thereby making the data collected by the second gas sensor 5 highly accurate. Therefore, the gas collection and analysis device 100 of the present invention detects data with high accuracy.

[0053] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A gas collection and analysis device, characterized in that, The gas collection and analysis device includes a housing with a receiving space, a partition dividing the receiving space into a first cavity and a second cavity, a first gas sensor disposed in the first cavity, an air pump installed in the housing, and a second gas sensor and a variable diameter pipe disposed in the second cavity respectively; the housing is respectively provided with a first air inlet, a second air inlet and an exhaust outlet passing through it; the first cavity is connected to the outside through the first air inlet and the air pump in sequence, and the second cavity is connected to the outside through the second air inlet and the exhaust outlet respectively; The air pump's inlet end is exposed outside the housing, and the air pump's outlet end is connected to the first air inlet. The air pump is used to draw external gas into the first cavity so that the first gas sensor can collect data. The inlet end of the variable diameter pipe is connected to the first cavity, and the outlet end of the variable diameter pipe is adjacent to the second inlet. The gas in the first cavity flows out through the outlet end of the variable diameter pipe to form the first gas and enters the second cavity. The cross-sectional area of ​​the side of the variable diameter pipe connected to the first cavity is larger than the cross-sectional area of ​​the side of the variable diameter pipe connected to the second cavity. Inside the second cavity, the entry of the first gas causes external gas to be drawn into the second cavity through the second air inlet, and the second gas sensor is used to collect data inside the second cavity.

2. The gas collection and analysis device according to claim 1, characterized in that, The variable diameter 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 away from the first section. The air inlet of the variable diameter pipe is located in the first section, and the air outlet of the variable diameter pipe is located in the third section. The cross-sectional area of ​​the first section is larger than that of the third section.

3. The gas collection and analysis device according to claim 2, characterized in that, The third segment comprises two segments arranged side by side, and the sum of the cross-sectional areas of the two segments is less than the cross-sectional area of ​​the first segment.

4. The gas collection and analysis device according to claim 1, characterized in that, The first gas sensor is provided in multiple ways, and the first gas sensor is one or more of the following: VOC sensor, TVOC sensor, air pressure sensor and temperature and humidity sensor.

5. The gas collection and analysis device according to claim 1, characterized in that, The second gas sensor is a PM10 sensor and / or a PM2.5 sensor.

6. The gas collection and analysis device according to claim 1, characterized in that, Both the first gas sensor and the second gas sensor are fixed to the partition.

7. The gas collection and analysis device according to claim 1, characterized in that, The housing includes an upper cover, a lower cover fixed to the upper cover and forming the receiving space together with the upper cover, a cover plate on the lower cover, and a push lock installed on the upper cover. The partition plate fixes the lower cover, the cover plate is used for waterproofing, and the push lock is used to lock or unlock the cover plate in the lower cover.

8. The gas collection and analysis device according to claim 1, characterized in that, The gas collection and analysis device also includes a display mounted on the outside of the housing and a processor fixed in the containment space. The processor is electrically connected to the display, the first gas sensor and the second gas sensor, respectively.

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