TWI756751B - Maintenance method of gas detecting device - Google Patents

Abstract

A maintenance method of gas detecting device is provided. The maintenance method of gas detecting device includes providing a gas detecting device, the gas detecting device including a housing component, a sensing component, a dust blocking element, and a detection area, the sensing component including a sensor, a reference light source, and a processor, the dust blocking element including a cover; generating a reference light projected towards the cover and the detection area, and the reference light can be reflected by the housing component to form a feedback light projected towards the cover and the sensor; receiving the feedback light by the sensor to generate a measurement information; comparing the measurement information and an initial information stored in the processor by the processor to obtain a dirt level information of the cover.

Description

Maintenance method of gas detection device

The present invention relates to a maintenance method, in particular to a maintenance method of a gas detection device.

First, after a gas detection device for measuring aerosols in the prior art is used for a period of time, dust or aerosols contaminate the photosensitive element used for detection in the gas detection device, thereby reducing the accuracy of the gas detection device.

In addition, when the external environment is suddenly in a state of high pollution (such as haze, fire in the adjacent environment, or dust generated by construction at the construction site, etc.), the gas detection device in the prior art may be immediately polluted, which affects the accuracy of the gas detection device. sex.

In addition, when the prior art gas detection device is contaminated, the entire set of gas detection devices must be replaced, resulting in an increase in cost.

Therefore, how to improve the stability of the measurement accuracy of the gas detection device and the service life of the gas detection device to overcome the above-mentioned defects through the improvement of the structural design has become one of the important issues to be solved by this technology. .

The technical problem to be solved by the present invention is to provide a maintenance method for a gas detection device aiming at the deficiencies of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a maintenance method for a gas detection device, which includes: providing a gas detection device, the gas detection device includes a housing component and a sensing component , a dust blocking element and a detection area, the sensing component and the dust blocking element are arranged in the housing component, and the sensing component and the dust blocking element are arranged corresponding to the detection area, Wherein, the sensing component includes a sensor, a reference light source and a processor, the processor is electrically connected to the sensor, the dust blocking element includes a cover, and the cover has Transmittance; a reference light beam projected toward the cover and the detection area is generated by the reference light source, and the reference light beam can be reflected by the housing component located in the detection area to generate a feedback light toward the cover and the sensor; receive the feedback light through the sensor to generate a measurement information; and compare the measurement information with the storage in the processor an initial information in the processor to obtain a contamination level information of the cover body.

One of the beneficial effects of the present invention is that the maintenance method of the gas detection device provided by the present invention can generate a reference light projected toward the cover and the detection area through the reference light source, and the The reference light can generate a feedback light toward the cover and the sensor through the reflection of the housing component located in the detection area", "receive the feedback light through the sensor, so as to generating a measurement information" and the technical solutions of "comparing the measurement information with an initial information stored in the processor by the processor to obtain a contamination level information of the cover", In order to know the contamination degree information of the cover of the dust blocking element of the gas detection device, the user can know whether to replace the dust blocking element of the gas detection device, and the stability of the measurement accuracy of the gas detection device can be improved.

For a further understanding of the features and technical content of the present invention, please refer to the following detailed descriptions and drawings of the present invention. However, the drawings provided are only for reference and description, and are not intended to limit the present invention.

The following are specific specific examples to illustrate the embodiments of the "maintenance method for a gas detection device" disclosed in the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention. Additionally, it should be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are primarily used to distinguish one element from another. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be.

[First Embodiment]

First, please refer to FIG. 1 and FIG. 2 . FIG. 1 and FIG. 2 are respectively schematic combined perspective views of the gas detection device according to the first embodiment of the present invention. The present invention provides a gas detection device U and a maintenance method thereof. The first embodiment will describe the structure of the gas detection device U, and the second embodiment will describe the maintenance method of the gas detection device U. In detail, the first embodiment provides a gas detection device U to detect the characteristics of a gas to be detected (not shown in the figure). For example, the gas detection device U can be used to detect the size and/or concentration of dust or particulate matter (PM) in the gas to be detected, such as but not limited to PM10 or PM2.5. However, it should be noted that, The present invention is not limited by the characteristics of the gas to be detected detected by the gas detection device U. That is, in another embodiment, the gas detection device U and the maintenance method thereof provided by the present invention may be used to detect the concentration of the gas.

3 to 6, FIG. 3 is a schematic diagram of the use state of the gas detection device according to the first embodiment of the present invention, FIG. 4 is a schematic perspective cross-sectional view of the VII-VII section of FIG. 1, and FIG. 5 is a 3 is a schematic three-dimensional cross-sectional view of the VV section, and FIG. 6 is a three-dimensional cross-sectional schematic view of the VI-VI section of FIG. 1 . The gas detection device U includes: a housing assembly 1 , a sensing assembly 2 and a dust blocking element 3 , and the dust blocking element 3 is detachably or replaceably arranged on the casing assembly 1 to avoid the gas to be tested. of dust or aerosols contaminate the sensing component 2. In other words, compared with the prior art gas detection device, which is polluted by dust or suspended particles in the gas to be detected after a period of use, which reduces the measurement accuracy of the sensing element, the present invention can use the dust to block The element 3 covers at least one element in the sensing element 2 (for example, a sensor 22 of the sensing element 2 ), so as to prevent the sensing element 2 from being polluted by dust or suspended particles in the gas to be detected, and at the same time, it can also be When the degree of contamination of the dust blocking element 3 exceeds a preset threshold, the feature that the dust blocking element 3 is detachably disposed on the housing assembly 1 is used, and a new or clean dust blocking element 3 is replaced to the gas detector. device U.

Next, please refer to FIG. 1 to FIG. 6 again, and please refer to FIG. 7 and FIG. 8 together. FIG. 7 is a schematic cross-sectional view of the VII-VII section of FIG. 1 , and FIG. 8 is an enlarged view of the VIII part of FIG. 7 . Schematic. Specifically, the housing assembly 1 includes a gas flow channel F and a tank body 10 , and the gas to be tested can pass along the gas flow channel F and pass through the detection area D on the path of the one-bit gas flow channel F. As shown in FIG. Preferably, the gas detection device U may further include a fan assembly 4, the fan assembly 4 is arranged on the housing assembly 1, and the fan assembly 4 can generate an air flow W to drive the gas to be measured to flow in the gas flow channel F and to flow. Pass the detection area D. In addition, the sensing component 2 is disposed in the housing component 1 , and the sensing component 2 includes a substrate 21 , a sensor 22 disposed on the substrate 21 , and a laser light source 23 electrically connected to the substrate 21 . The detector 22 and the laser light source 23 are provided corresponding to the detection area D, respectively. In addition, the dust blocking element 3 is detachably disposed in the tank body 10 of the housing assembly 1 to prevent dust or suspended particles in the gas to be measured from contaminating the sensor 22 in the sensing assembly 2, and the dust blocking element 3 It includes a base 31 and a cover 32 arranged on the base 31 . The cover body 32 has light transmittance, the cover body 32 is disposed corresponding to the detection area D, and the vertical projection of the cover body 32 on the substrate 21 at least partially overlaps the vertical projection of the sensor 22 on the substrate 21 . In other words, the sensor 22 and the cover 32 are two different components, and the cover 32 can cover the sensing top surface 200 of the sensor 22 to avoid dust or aerosol pollution in the gas to be measured Sensor 22 in sensing assembly 2 . In addition, for example, a sensing top surface 200 of the sensor 22 is adjacent to the cover body 32 , and there may be a distance greater than or equal to 0 mm between the sensing top surface 200 of the sensor 22 and the cover body 32 distance. In addition, it should be noted that the cover body 32 may be disposed on the base 31 by means of dispensing, hot melting, or insert injection molding (Insert Molding, or can be referred to as embedded injection molding). The present invention is not limited by the combination of the cover 32 and the base 31 .

Based on the above, according to the present invention, the laser light source 23 can generate a laser beam (not shown in the figure) projected on the detection area D, so that the sensor 22 can detect the gas to be detected passing through the detection area D size and/or concentration of dust or aerosols. In addition, preferably, the sensing component 2 may further include a processor 25, and the processor 25 can be electrically connected to the sensor 22 to receive the result after the sensor 22 detects the dust or suspended particles in the gas to be detected. The generated electrical signal (such as but not limited to a voltage signal or a current signal), and the processor 25 can use the received electrical signal and the principle of Mie scattering to calculate the value of the dust or aerosol in the gas to be tested. size and/or concentration. In addition, for example, the processor 25 can be a microcontroller (Microcontroller Unit, MCU), and the sensor 22 can be a photosensitive element, such as, but not limited to, a photodiode. The examples given above are limitations.

Next, please refer to FIGS. 1 to 8 again, and also refer to FIGS. 9 to 14 . FIGS. 9 to 12 are respectively exploded perspective views of the gas detection device according to the first embodiment of the present invention, and FIG. 13 FIG. 14 is a schematic perspective view of the first housing of the gas detection device according to the first embodiment of the present invention, and FIG. 14 is a schematic perspective view of the second housing of the gas detection device according to the first embodiment of the present invention. For example, the casing assembly 1 may include a first casing 11 and a second casing 12 corresponding to the first casing 11 , and an accommodating space is formed between the first casing 11 and the second casing 12 (not shown in the figure), and the first casing 11 , the second casing 12 , the sensing assembly 2 and the fan assembly 4 can be combined with each other through a locking member S, respectively. In addition, the first casing 11 includes a first casing body 111 and an air inlet 112 disposed on the first casing body 111 , and the second casing 12 includes a second casing body 121 and an air inlet 112 disposed on the second casing body Exhaust port 122 on 121. The gas flow channel F is formed between the air inlet 112 and the air outlet 122, and the fan assembly 4 can generate an air flow W to drive the gas to be measured to enter from the air inlet 112 and pass through the detection area D, and to drive the gas to be measured to pass through the detection area D. The exhaust port 122 discharges. However, it should be noted that although the present invention takes the embodiment in which the air inlet 112 is provided on the first housing body 111 and the exhaust port 122 is provided on the second housing body 121 as an example, the present invention does not The installation positions of the intake port 112 and the exhaust port 122 are limited.

Based on the above, the substrate 21 may include a first surface 211 and a second surface 212 corresponding to the first surface 211 , the first case 11 is closer to the first surface 211 than the second case 12 , and the second case 12 is closer to the second surface 212 than the first housing 11 is. In addition, the fan assembly 4 may be disposed between the second surface 212 of the base plate 21 and the second housing 12 . In addition, the housing assembly 1 may further include a bearing seat 13 , the bearing seat 13 may be disposed between the first surface 211 of the substrate 21 and the first casing 11 , and the laser light source 23 may be arranged on the bearing seat 13 . The bearing base 13 may include a base body 131 , an accommodating slot 132 disposed on the base body 131 , a frame body 133 connected to the base body 131 , and an opening 134 passing through the frame body 133 . The laser light source 23 may be disposed in the accommodating groove 132 . The frame body 133 can be disposed adjacent to the sensor 22 , and the frame body 133 can surround the sensor 22 so that the sensor 22 is located in the opening 134 . The sensor 22 may be exposed relative to the opening 134 , and the vertical projection of the opening 134 relative to the substrate 21 at least partially overlaps the vertical projection of the sensor 22 relative to the substrate 21 . In addition, the base 31 of the dust blocking element 3 can abut on the base body 131 of the carrier 13 , and the cover 32 of the dust blocking element 3 can cover the opening 134 of the carrier 13 , so that the cover 32 is opposite to the substrate The vertical projection of 21 at least partially overlaps the vertical projection of opening 134 relative to substrate 21 . In this way, the sensor 22 can be disposed in a shielded area E formed between the substrate 21 , the frame body 133 and the cover body 32 to prevent the sensor 22 from being subjected to dust in the gas to be measured passing through the gas flow channel F or aerosol pollution.

As mentioned above, the casing assembly 1 may further include a light guide plate 14 disposed on the first casing body 111 and a light extinction structure 15 disposed on the first casing body 111 and adjacent to the light guide plate 14 . For example, after the laser light generated by the laser light source 23 passes through the detection area D, it can be projected onto the light guide plate 14 , and the laser light projected on the light guide plate 14 can be projected onto the light guide plate 14 through the reflection of the light guide plate 14 . on the extinction structure 15 . In this way, the laser light can be prevented from being reflected into the detection area D again, thereby affecting the detection accuracy.

Based on the above, the dust blocking element 3 may further include a flow guide structure 33 , the flow guide structure 33 is connected to the base 31 , and the flow guide structure 33 includes a flow guide body 331 and a guide hole 332 disposed on the flow guide body 331 . , and the guide hole 332 is communicated with the gas flow channel F. In other words, according to the present invention, the diversion structure 33 can be connected to the base 31 and disposed in a folded manner relative to the base 31 , and the base 31 and the diversion body 331 can close the groove body 10 . Thereby, a gas flow channel F can be formed between the housing assembly 1 and the dust blocking element 3, and the dust blocking element 3 can block the sensor 22 from the gas flow channel F to avoid suspended particles in the gas to be measured. Contamination sensor 22 . In addition, for example, the housing assembly 1 may further include a first positioning portion 1F disposed adjacent to the tank body 10 , and the dust blocking element 3 may further include a second positioning portion 3F corresponding to the first positioning portion 1F , the dust blocking element 3 is fixed on the first positioning portion 1F of the housing assembly 1 through the second positioning portion 3F. However, it should be noted that, in other embodiments, the groove body 10 and the dust blocking element 3 may be tightly fitted, so that the dust blocking element 3 can be fixed in the tank body 10 .

Based on the above, it is worth noting that, since the diversion structure 33 can be arranged at a turning point relative to the base 31, the gas flow channel F is also arranged at a turning point here, whereby the dust or suspended particles in the gas to be measured can be removed. It may accumulate or adhere here, causing blockage of the gas flow channel F. Therefore, when the new or clean dust blocking element 3 is replaced on the gas detection device U, the dust or aerosols accumulated or adhered to the connection between the flow guiding structure 33 and the base 31 can be removed together .

Next, please refer to FIG. 4 to FIG. 12 , the sensing element 2 may further include a reference light source 24 disposed on the first surface 211 of the substrate 21 and adjacent to the sensor 22 , and the reference light source 24 is on the substrate 21 . The vertical projection on the lid 32 at least partially overlaps the vertical projection of the cover 32 on the substrate 21 . For example, the reference light source 24 can be a light emitting diode (LED), but the invention is not limited thereto. In addition, the reference light source 24 can generate a reference light beam L1 projected toward the cover body 32 and the detection area D, and the reference light beam L1 can be reflected by the housing component 1 located in the detection area D to generate a reference light beam L1 directed toward the cover body 32 and the sensor. 22 of the feedback light L2. In this way, the sensor 22 and the processor 25 can obtain the degree of contamination of the cover 32 of the dust blocking element 3 according to the energy of the feedback light L2.

Based on the above, the sensing component 2 may further include a signal transmission element 26 disposed on the substrate 21 , and the processor 25 is electrically connected to the sensor 22 , the reference light source 24 and the signal transmission element 26 . In this way, the signal transmission element 26 can be used to transmit the contamination level information of the cover body 32 to an electronic device (not shown in the figure). For example, the signal transmission element 26 of the gas detection device U and the electronic device can be connected by a wireless signal or a wired signal, but the invention is not limited to this. For example, according to the invention, the signal transmission element 26 can be a connector, and the signal is transmitted to the electronic device by means of wired transmission. At the same time, the signal transmission element 26 can also be used to supply power to the gas detection device U. Inventions are not limited to this. It should be noted that, in other embodiments, the signal transmission element 26 may be a Bluetooth (Blue Tooth) module, a Wi-Fi module or a Near Field Communication (Near Field Communication, NFC) module for wireless transmission. For transmitting the signal to the electronic device, the present invention is not limited by the structure of the signal transmitting element 26 .

Next, please refer to FIG. 15 . FIG. 15 is a schematic diagram of a use state of another embodiment of the gas detection device according to the first embodiment of the present invention. 15 and FIG. 3 , it can be seen that the forms of the dust blocking element 3 and the tank body 10 in FIG. 15 are different from those of the dust blocking element 3 and the tank body 10 in FIG. 3 . In other words, in the embodiment of FIG. 15 , the cover body 32 can be arranged on a sheet-like base 31 , and the housing assembly 1 has a groove corresponding to the cover body 32 and the sheet-like base 31 . 10.

[Second Embodiment]

First, please refer to FIG. 16 . FIG. 16 is a flowchart of a maintenance method for a gas detection device according to a second embodiment of the present invention. The second embodiment of the present invention provides a maintenance method for a gas detection device U, which includes the following Step: As shown in step S101, a gas detection device U is provided. For example, the gas detection device U may include a housing component 1 , a sensing component 2 , a dust blocking element 3 and a detection area D. The sensing component 2 and the dust blocking component 3 are disposed in the housing component 1 , And the sensing component 2 and the dust blocking element 3 are disposed corresponding to the detection area D. In addition, the sensing component 2 includes a sensor 22 , a reference light source 24 and a processor 25 . The processor 25 is electrically connected to the sensor 22 . The dust blocking element 3 is detachably disposed on the housing assembly 1 , and the dust blocking element 3 includes a cover body 32 , and the cover body 32 has light transmittance. In addition, the sensing component 2 may further include a substrate 21 on which the sensor 22 , the reference light source 24 and the processor 25 are disposed. In addition, the vertical projection of the cover 32 on the substrate 21 at least partially overlaps with the vertical projection of the sensor 22 on the substrate 21 , and the vertical projection of the cover 32 on the substrate 21 and the vertical projection of the reference light source 24 on the substrate 21 at least partially overlap. It should be noted that the structure of the gas detection device U described in the second embodiment is similar to the structure of the gas detection device U provided by the first embodiment, and will not be repeated here.

Next, as shown in step S102 , a reference light beam L1 projected toward the cover body 32 and the detection area D is generated by the reference light source 24 , and the reference light beam L1 can be reflected by the housing component 1 located in the detection area D to generate a reference light beam directed toward the cover. The body 32 and the feedback light L2 of the sensor 22 . For example, please refer to FIG. 8 together, the reference light L1 can be projected through the cover 32 to the housing component 1 located in the detection area D, and projected to the reference light L1 of the housing component 1 located in the detection area D A feedback light L2 can be formed by the reflection of the housing assembly 1, and the feedback light L2 can be projected to the sensor 22 through the cover 32, so that the sensor 22 can receive the energy of the feedback light L2.

Next, as shown in step S103, the sensor 22 receives the feedback light L2 to generate measurement information. For example, please refer to FIG. 8 together, after the sensor 22 receives the energy of the feedback light L2, it can generate an electrical signal (such as but not limited to a voltage signal or a current signal), and the processor 25 can use the energy of the feedback light L2. The electrical signal generated by the detector 22 is used to calculate a measurement information.

Next, as shown in step S104 , the processor 25 compares the measurement information with an initial information stored in the processor 25 to obtain a degree of contamination information of the cover 32 . For example, the initial information may be the electrical signal of the energy of the feedback light L2 generated by the reference light source 24 under the current state detected by the sensor 22 in the gas detection device U before the gas detection device U leaves the factory, and the processor 25 An initial information can be calculated using the electrical signal generated by the sensor 22 . That is to say, the current state of the gas detection device U is that the cover body 32 is clean and free from dust pollution, and the laser light source 23 and the fan assembly 4 are turned off, the reference light source 24 generates a direction toward the cover body 32 and detects The reference light L1 projected by the area D, the reference light L1 is reflected or refracted by the housing component 1 located in the detection area D to generate a feedback light L2 toward the cover 32 and the sensor 22, and the sensor 22 can receive The received feedback light L2 generates an electrical signal, and the processor 25 can use the electrical signal generated by the sensor 22 to calculate an initial information, and the obtained initial information represents that the cover 32 is clean and free from dust pollution condition. In this way, a contamination level information of the cover body 32 can be obtained by comparing the measurement information with the initial information. For example, the measurement information is a measurement current value generated after the energy of the feedback light L2 measured by the sensor 22 is fed back, and the initial information is the initial current value stored in the processor 25, that is, through The measured current value is compared with the initial current value to obtain information on the degree of contamination of the cover body 32 of the gas detection device U after a period of use.

Based on the above, it should be noted that, in the step of obtaining the contamination level information of the cover body 32 by comparing the measurement information with the initial information by the processor 25 , the step of storing the contamination level information of the cover body 32 in the in processor 25. In addition, the maintenance method of the gas detection device U provided above may be to use the processor 25 to control the gas detection device U to perform the above steps periodically after using the gas detection device U for a predetermined period of time to monitor the degree of contamination of the cover body 32 of the gas detection device U. Information.

Next, please refer to FIG. 17. FIG. 17 is another flowchart of the maintenance method of the gas detection device according to the second embodiment of the present invention. It can be seen from the comparison between FIG. 17 and FIG. 16 that in the embodiment of FIG. The measuring assembly 2 may further include a signal transmission element 26 , the signal transmission element 26 is disposed on the substrate 21 , the processor 25 is electrically connected to the signal transmission element 26 , and the signal transmission element 26 can transmit the information of the degree of contamination of the cover body 32 to an electronic device (not shown). In addition, it should be noted that, in the embodiment of FIG. 17 , steps S101 , S102 , S103 and S104 are similar to those of the embodiment of FIG. 16 , which will not be repeated here.

Based on the above, as shown in step S105 , the information of the degree of contamination of the cover body 32 is transmitted to an electronic device through the signal transmission element 26 . In other words, after the step of comparing the measurement information with the initial information to obtain the contamination level information of the cover body 32, the signal transmission element 26 can also be used to transmit the contamination level information of the cover body 32 to an electronic device, so as to The user is informed whether the dust barrier element 3 should be replaced. Furthermore, after the step of comparing the measurement information with the initial information to obtain the contamination level information of the cover body 32 , the process may further include: determining, by the processor 25 , whether the contamination level information of the cover body 32 exceeds a predetermined level. A threshold is set, and when the contamination level information of the cover body 32 exceeds the preset threshold value, the signal transmission element 26 transmits the contamination level information of the cover body 32 to an electronic device. Therefore, in one embodiment, in the step of determining by the processor 25 whether the contamination level information of the cover body 32 exceeds the preset threshold value, the processor 25 determines the difference between the initial current value and the measured current value. Whether the difference between them exceeds the preset threshold. In addition, it should be noted that the present invention is not limited to the timing of transmitting the contamination level information of the cover body 32 to an electronic device. That is to say, the gas detection device U can transmit the contamination level information of the cover body 32 to the electronic device at a predetermined time, such as one month or two months. In addition, the gas detection device U can also transmit the contamination level information of the cover body 32 to an electronic device through the signal transmission element 26 when the contamination level information of the cover body 32 exceeds a preset threshold.

[Advantageous effects of the embodiment]

One of the beneficial effects of the present invention is that the gas detection device U provided by the present invention can be detachably installed in the groove body 10 of the housing assembly 1 through the "dust blocking element 3, and the dust blocking element 3 includes a base. The seat 31 and a cover 32 disposed on the base 31 ” and “the cover 32 have light transmittance, the cover 32 is disposed corresponding to the detection area D, and the vertical projection and sensing of the cover 32 on the substrate 21 The vertical projection of the gas detector 22 on the substrate 21 at least partially overlaps”, so as to improve the service life of the gas detection device U.

In addition, the maintenance method of the gas detection device U provided by the present invention can generate a reference light L1 projected toward the cover 32 and the detection area D through the reference light source 24, and the reference light L1 can pass through the detection area D. The reflection of the housing component 1 generates a feedback light L2 toward the cover 32 and the sensor 22 ”, “receive the feedback light L2 through the sensor 22 to generate a measurement information” and “comparison through the processor 25 The technical solution of measuring information and an initial information stored in the processor 25 to obtain a contamination level information of the cover body 32, so as to know the degree of contamination of the cover body 32 of the dust blocking element 3 of the gas detection device U. The information is used to let the user know whether to replace the dust blocking element 3 of the gas detection device U, so as to improve the stability of the measurement accuracy of the gas detection device U.

The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

U: Gas detection device 1: Shell assembly 10: tank body 11: The first shell 111: The first shell body 112: Air intake 12: Second shell 121: Second shell body 122: exhaust port 13: Bearing seat 131: Seat 132: accommodating slot 133: Frame 134: Opening 14: Light guide plate 15: Extinction structure 1F: The first positioning part 2: Sensing components 200: Sensing top surface 21: Substrate 211: First Surface 212: Second Surface 22: Sensor 23: Laser light source 24: Reference light source 25: Processor 26: Signal transmission components 3: Dust blocking element 31: Pedestal 32: Cover 33: Diversion structure 331: Diversion body 332: diversion hole 3F: Second positioning part 4: Fan assembly S: Lock Firmware L1: reference ray L2: Feedback light D: Detection area E: shaded area F: Gas flow channel W: Airflow

FIG. 1 is a three-dimensional combined schematic diagram of the gas detection device according to the first embodiment of the present invention.

FIG. 2 is another three-dimensional combined schematic diagram of the gas detection device according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram of the use state of the gas detection device according to the first embodiment of the present invention.

FIG. 4 is a schematic three-dimensional cross-sectional view of the VII-VII section of FIG. 1 .

FIG. 5 is a schematic three-dimensional cross-sectional view of the V-V section of FIG. 3 .

FIG. 6 is a schematic perspective cross-sectional view of the VI-VI section of FIG. 1 .

FIG. 7 is a schematic cross-sectional view of the VII-VII section of FIG. 1 .

FIG. 8 is an enlarged schematic view of part VIII of FIG. 7 .

9 is a schematic exploded perspective view of one of the gas detection devices according to the first embodiment of the present invention.

10 is another schematic exploded perspective view of the gas detection device according to the first embodiment of the present invention.

FIG. 11 is another three-dimensional exploded schematic diagram of the gas detection device according to the first embodiment of the present invention.

FIG. 12 is another three-dimensional exploded schematic view of the gas detection device according to the first embodiment of the present invention.

13 is a schematic perspective view of the first housing of the gas detection device according to the first embodiment of the present invention.

14 is a schematic perspective view of the second housing of the gas detection device according to the first embodiment of the present invention.

FIG. 15 is a schematic diagram of a use state of another embodiment of the gas detection device according to the first embodiment of the present invention.

FIG. 16 is one of the flowcharts of the maintenance method of the gas detection device according to the second embodiment of the present invention.

FIG. 17 is another flowchart of the maintenance method of the gas detection device according to the second embodiment of the present invention.

U: Gas detection device 1: Shell assembly 10: tank body 11: The first shell 111: The first shell body 112: Air intake 12: Second shell 1F: The first positioning part 3: Dust blocking element 31: Pedestal 32: Cover 33: Diversion structure 331: Diversion body 332: diversion hole 3F: Second positioning part S: Lock Firmware

Claims (9)

A maintenance method for a gas detection device, comprising: providing a gas detection device, the gas detection device includes a housing component, a sensing component, a dust blocking element and a detection area, the sensing component and the The dust blocking element is arranged in the housing assembly, and the sensing element and the dust blocking element are arranged corresponding to the detection area, wherein the sensing element includes a sensor, a reference light source and a a processor, the processor is electrically connected to the sensor, the dust blocking element includes a cover, and the cover has light transmittance; the reference light source generates a direction toward the cover and The reference light projected by the detection area, and the reference light can be reflected by the housing component located in the detection area to generate a feedback light toward the cover and the sensor; through the The sensor receives the feedback light to generate a measurement information; the processor compares the measurement information with an initial information stored in the processor to obtain a dirty information of the cover contamination level information; and determining by the processor whether the contamination level information of the cover body exceeds a preset threshold; wherein, when the contamination level information of the cover body exceeds the preset threshold When the value is set, the contamination level information of the cover body is transmitted to an electronic device through a signal transmission element. The maintenance method of the gas detection device according to claim 1, wherein the processor is electrically connected to the signal transmission element. The maintenance method for a gas detection device according to claim 2, wherein after the step of comparing the measurement information and the initial information to obtain the contamination level information of the cover, further comprising: : transmit the contamination level information of the cover body to an electronic device through the signal transmission element. The maintenance method for a gas detection device according to claim 1, wherein the measurement information is a measurement current value generated by the feedback light energy measured by the sensor, and the measurement information is The initial information is the initial current value stored in the processor. The maintenance method for a gas detection device according to claim 4, wherein, in the step of judging by the processor whether the contamination level information of the cover body exceeds the preset threshold value, the process is performed by the processor The processor determines whether the difference between the initial current value and the measured current value exceeds the preset threshold value. The maintenance method for a gas detection device according to claim 2, wherein the sensing component further comprises a substrate, and the sensor, the reference light source, the processor and the signal transmission element are arranged on on the substrate; wherein the vertical projection of the cover on the substrate at least partially overlaps with the vertical projection of the sensor on the substrate, and the vertical projection of the cover on the substrate At least partially overlaps with the vertical projection of the reference light source on the substrate. The maintenance method for a gas detection device according to claim 2, wherein in the step of comparing the measurement information with the initial information by the processor to obtain the contamination level information of the cover body In the method, it further includes storing the contamination level information of the cover in the processor. The maintenance method for a gas detection device according to claim 1, wherein the reference light can pass through the cover and be projected to the housing component located in the detection area, and the feedback light can pass through the cover The cover is projected to the sensor. The maintenance method for a gas detection device according to claim 1, wherein the measurement information is a measurement current value generated by the feedback light energy measured by the sensor, and the measurement information is The initial information is the initial current value stored in the processor.

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