Gas detection device

Abstract

To provide a gas detection device that comprises a housing, an external plug member, a power converter, a control processing board, a network module, a fine particle detection module, and a temperature / humidity sensor.SOLUTION: A control processing board, a network module, a fine particle detection module, a temperature / humidity sensor, a power converter, and an external plug member are provided in a housing to form a thin and portable device. With the external plug member plugged in an indoor power source as necessary, the fine particle detection module starts detecting airborne particles included in air in an environment, the temperature / humidity sensor can start detecting a temperature and humidity in the environment. Detected data information is transmitted to a cloud device via Internet communication of things in which the network module activates, information data on air quality is immediately transmitted to an indoor air pollution prevention system, and then, forming a clean and safe breathing gas state in an indoor space is facilitated.SELECTED DRAWING: Figure 2B

Description

[Technical field]

[0001] The present invention relates to a gas detection device, and more particularly to an extremely thin gas detection device that can realize gas detection in an indoor air pollution prevention control system, instantly transmit air quality information to the system, and promote the creation of safe breathable air conditions in indoor spaces. [Background technology]

[0002] Suspended particles refer to solid particles or liquid droplets contained in gas. Because the particle size is very small, they can easily enter human lungs through nasal hairs in the nasal cavity, causing lung inflammation, asthma, and cardiovascular disease. In addition, if other pollutants adhere to the suspended particles, they may harm the respiratory system and aggravate the damage. In recent years, the problem of air pollution has become increasingly serious, and the concentration data of suspended particles (e.g., fine particles such as PM2.5) is often too high, so the concentration monitoring of gas-suspended particulate matter has gradually attracted attention. However, gas changes due to wind direction and unstable wind volume, and most of the current gas quality monitoring stations that detect suspended particulate matter are fixed-point observations, so it is not possible to check the concentration of suspended particulate matter in the surrounding area.

[0003] Furthermore, modern people are paying more and more attention to the quality of the gas around them, because exposure to gases such as carbon monoxide, carbon dioxide, volatile organic compounds (VOCs), PM2.5, nitric oxide, and sulfur, as well as fine particles contained in gases, can affect human health and, in severe cases, endanger life. Therefore, the quality of ambient gas has attracted the attention of many countries, and how to avoid areas with poor gas quality and how to detect gas quality to avoid them has become an important issue.

[0004] To check the quality of gas, a gas sensor can be used to detect the surrounding gas. If the gas is detected and the detection information is provided in real time, it can warn people in the vicinity so that they can avoid the situation immediately. In order to avoid the impact and injury of the gas hazards in the environment to the human body, it is a very good application to use a gas sensor to detect the surrounding environment.

[0005] Therefore, it is the development objective of the present invention to place a very thin gas detection device in an indoor air pollution prevention and control system, plug it into an external power socket to detect gases in the indoor ambient environment, and transmit air quality information to the system in real time to promote a clean and safe breathing gas condition in the indoor space. Summary of the Invention [Problem to be solved by the invention]

[0006] The objective of the present invention is to provide a gas detection device, in which a control processing board, a network module, a particle detection module, a temperature and humidity sensor, a power converter, and an external plug member are provided inside the gas detection device, forming a thin and portable device, and by plugging into an indoor power source through the external plug member, the particle detection module operates to detect suspended particles in the gas (e.g., PM10, PM2.5, PM1), and the temperature and humidity sensor operates to detect the temperature and humidity of the environment, and the detected detection information data is transmitted to a cloud processing device through the Internet of Things (IOT) operated by the network module, thereby realizing the gas detection of the indoor air pollution prevention and control system, and at the same time, the acquired information data can be transmitted as a warning or notification on the indoor display device, as well as a warning or notification on the application software (APP) of the mobile device. Furthermore, the acquired information data can be used for intelligent comparison by the cloud processing device or comparison using big data, and the cloud processing device can send communication commands to operate indoor gas cleaning and filtering devices (e.g., purifiers, ventilation fans, range hoods, outdoor air fans, etc.) accordingly, to clean and remove indoor air pollution. The gas detection device configured in this way performs gas detection for an indoor air pollution prevention and control system, and transmits air quality information data to the system in real time, promoting the formation of a clean and safe breathing gas state in the indoor space. [Means for solving the problem]

[0007] In order to achieve the above object, an embodiment of the present invention provides a gas detection device, comprising a housing, an external plug member, a power converter, a control processing board, a network module, a particle detection module, and a temperature and humidity sensor. The housing comprises an upper housing and a lower housing, the side edge of the lower housing is provided with a plurality of ventilation holes, the lower edge of the lower housing is provided with an engagement hole structure, and a groove is formed on the bottom surface of the lower housing. The external plug member is pivotally connected to the lower housing, can be folded and accommodated in the groove so as not to protrude to the outside, and can be pulled out of the groove to be exposed to the outside of the lower housing for connection to an external power source. The power converter is electrically connected to the external plug member, and converts the external power source into a required DC power source and outputs it. The control processing board is electrically connected to the power converter to supply a starting power source, and receives and processes a plurality of information data, and converts the information data into communication data. The network module is disposed on the upper housing side and packaged together with the control processing board in an integrated circuit, and receives the communication data processed by the control processing board and outputs it to the outside. The particle detection module is disposed on the opposite side of the bottom surface of the lower housing and adjacent to the opposite side of the control processing board on which the network module is packaged, and is electrically connected to the control processing board via a first flexible substrate to detect gas and obtain the information data of the gas, the information data being transmitted to the control processing board and converted into the communication data, and transmitted to the outside via the network module. The temperature and humidity sensor is disposed on the lower housing side and electrically connected to the control processing board via a second flexible substrate to detect temperature and humidity and obtain the information data of the temperature and the humidity, the information data being transmitted to the control processing board and converted into the communication data, and transmitted to the outside via the network module. [Brief description of the drawings]

[0008] [Figure 1A] 1 is a three-dimensional view of a gas detection device of the present invention. [Figure 1B] FIG. 2 is a view showing the outer plug member of the gas detection device of the present invention deployed and used. [Figure 1C] FIG. 13 is a diagram showing the state in which the outer plug member of the gas detection device of the present invention is folded for use. [Figure 2A] FIG. 2 is a three-dimensional view showing the internal structure of the gas detection device of the present invention. [Figure 2B] 2 is a side view showing the internal structure of the particle detection module of the present invention. FIG. [Figure 3A] 1 is a diagram showing a three-dimensional structure of a particle detection module according to the present invention; [Figure 3B] 11 is a structural diagram showing the three-dimensional structure of the particle detection module of the present invention as viewed from a different angle. [Figure 3C] 1 is a diagram showing an exploded structure of a particle detection module according to the present invention; [Figure 4A] 2 is a three-dimensional view of the base part of the particle detection module of the present invention. [Figure 4B] 11 is a three-dimensional view of the base portion of the particle detection module of the present invention when viewed from a different angle. [Diagram 5] 2 is a three-dimensional view of a state in which a laser assembly and a particle sensor are installed on the base of the particle detection module of the present invention. [Figure 6A] 2 is an exploded view of the particle detection module of the present invention when a piezoelectric actuator is attached to a base portion. FIG. [Figure 6B] 2 is a three-dimensional view of the particle detection module of the present invention when a piezoelectric actuator is attached to a base portion. FIG. [Figure 7A] FIG. 2 is an exploded view of a piezoelectric actuator of the particle detection module of the present invention. [Figure 7B] 11 is a three-dimensional view of the piezoelectric actuator of the particle detection module of the present invention when viewed from a different angle. [Figure 8A] 1 is a cross-sectional view of a state in which a piezoelectric actuator of the particle detection module of the present invention is attached to a gas introduction assembly mounting area. [Figure 8B] 8B is a diagram illustrating the operation of the piezoelectric actuator of FIG. 8A. [Figure 8C] 8B is a diagram illustrating the operation of the piezoelectric actuator of FIG. 8A. [Figure 9A] FIG. 2 illustrates the gas paths of the particle detection module. [Figure 9B] FIG. 2 illustrates the gas paths of the particle detection module. [Figure 9C] FIG. 2 illustrates the gas paths of the particle detection module. [Figure 10] FIG. 2 shows the light beam path emitted by the laser assembly of the particle detection module of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The following detailed description will be given of embodiments embodying the features and advantages of the present invention. The present invention can be modified in various ways without departing from the scope of the present invention. It should be understood that the present specification and drawings are for illustrative purposes only and not for limiting the present invention.

[0010] As shown in Figures 1A, 1B, 1C, 2A and 2B, the gas detection device provided by the present invention comprises a housing 1, an external plug member 2, a power converter 3, a control processing board 4, a network module 5, a particle detection module 6, and a temperature and humidity sensor 7.

[0011] The housing 1 includes an upper housing 11 and a lower housing 12, and the power converter 3, the control processing board 4, the network module 5, the particle detection module 6, and the temperature and humidity sensor 7 are installed inside a space defined by the upper housing 11 and the lower housing 12. The power converter 3 and the network module 5 are packaged on the control processing board 4 to form an integrated integrated circuit. The network module 5 is installed on the inner edge surface (inner surface) of the upper housing 11. The external plug member 2 is pivotally connected to the lower housing 12. When the external plug member 2 is not connected to a power source, the external plug member 2 can be folded and stored in a groove 121 formed on the bottom surface of the lower housing 12 so as not to be exposed to the outside (see FIG. 1C). When the external plug member 2 is connected to a power source, the external plug member 2 is pulled out from the groove 121 (rotated from the folded state and pulled out), exposed from the lower housing 12, and connected to the power source (inserted) (see FIG. 1B). The particle detection module 6 is disposed on the other side of the bottom surface of the lower housing 12 (the side of the bottom surface different from the side where the external plug member 2 is installed, the inside of the lower housing 12), and is positioned and mounted on the other side of the control processing board 4 (the side opposite to the side where the network module 5 is installed with respect to the control processing board 4, i.e., the position adjacent to the network module 5 across the control processing board 4) so ​​as to be adjacent to the network module 5. The temperature and humidity sensor 7 is disposed on the lower housing 12 side, and here, the lower housing 12 side may be any position on the other side of the bottom surface of the lower housing 12, for example, either the side edge or the bottom edge of the inner edge surface of the lower housing 12. In one embodiment, the temperature and humidity sensor 7 is disposed on the side edge of the inner edge surface of the lower housing 12, between the particle detection module 6 and a plurality of ventilation holes 122. In addition, a plurality of ventilation holes 122 for introducing or discharging gas into the housing 1 are provided on the side edge of the lower housing 12. An engagement hole structure 123 is provided on the lower edge portion of the lower housing 12, and the engagement hole structure 123 can engage with an external power socket by engaging with an engagement member (not shown) when the external plug member 2 is inserted into a power source.This positions the entire gas detection device and prevents it from being detached due to touching or collision. The external plug member 2 is a power connector, a USB port, a mini USB port, a Micro USB port, or a USB Type C port. In this embodiment, as shown in FIG. 1B, the external plug member 2 is a power connector.

[0012] As shown in FIG. 2A and FIG. 2B, the external plug member 2 is connected to an external power source and supplies power to the power converter 3, which converts the power into direct current (DC, direct current) and outputs it to the control processing board 4. This can provide the power required for the operation of the network module 5, the particle detection module 6, and the temperature and humidity sensor 7. As shown in FIG. 2B, a person skilled in the art can easily understand that the flexible board is a transmission connection line required for the electrical connection of electronic components. For the sake of simplicity, however, the lower flexible board 8 is taken as the first flexible board or the second flexible board, respectively, and is provided on the particle detection module 6 and the temperature and humidity sensor 7 as an example. The particle detection module 6 is electrically connected to the control processing board 4 via the first flexible board, and the temperature and humidity sensor 7 is electrically connected to the control processing board 4 via the second flexible board. In addition, the control processing board 4 is also connected to a switch 9, which is exposed to the outside of the upper housing 11. When the user presses the switch 9, the control processing board 4 supplies power and can control the operation of the network module 5, the particle detection module 6, and the temperature and humidity sensor 7. The network module 5 can initiate Internet of Things (IOT) communication, the particle detection module 6 can operate accordingly to initiate detection of suspended particles (e.g., PM10, PM2.5, PM1) in the environment, and the temperature and humidity sensor 7 starts detecting the temperature and humidity of the environment. Note that the network module 5 may be a WIFI communication module, and in this embodiment, the network module 5 is a cloud computing service (e.g., Amazon Web Services, AWS) wireless network communication module, and the network module 5 is installed on the upper housing 11 side and directly exposed to the outside of the entire gas detection device, so that communication signals can be easily transmitted and received and the communication signals are less susceptible to interference from the control processing board 4.

[0013] 3A to 7B, the particle detection module 6 includes a base portion 61, a piezoelectric actuator 62, a drive circuit board 63, a laser assembly 64, a particle sensor 65, and a lid portion 66. The drive circuit board 63 is attached to the second surface 612 of the base portion 61 so as to be sealed thereto, and the laser assembly 64 is disposed on the drive circuit board 63 and electrically connected thereto. The particle sensor 65 is disposed on the drive circuit board 63 and electrically connected thereto. The lid portion 66 is configured to cover the base portion 61 and is attached to cover the first surface 611 of the base portion 61. The lid portion 66 includes a side plate 661, and the side plate 661 is provided with an intake frame opening 661a and an exhaust frame opening 661b. When the particle detection module 6 is placed in the lower housing 12 of the housing 1, the intake frame opening 661a sucks in and introduces gas introduced by the vent hole 122, and the gas exhausted from the exhaust frame opening 661b can be exhausted by the vent hole 122.

[0014] As shown in FIG. 4A and FIG. 4B, the base portion 61 includes a first surface 611, a second surface 612, a laser installation area 613, a gas supply groove 614, a gas introduction assembly mounting area 615, and a gas exhaust groove 616. The first surface 611 and the second surface 612 are two surfaces facing opposite each other. The laser installation area 613 is formed by recessing the first surface 611 toward the second surface 612 (the first surface 611 is recessed toward the second surface 612, or the laser installation area 613 is recessed in the first surface 611), and the gas supply groove 614 is formed by recessing the second surface 612 (the second surface 612 is recessed) and is adjacent to the laser installation area 613. An intake port 614a is provided in the gas supply groove 614, the intake port 614a being communicated with the outside of the base portion 61 and corresponding to the position of an intake frame opening 661a of the lid portion 66. A light-transmitting window 614b is provided in a side wall of the gas supply groove 614 (a side wall shared by the gas supply groove 614 and the laser installation area 613), and the gas supply groove 614 is communicated with the laser installation area 613 via the light-transmitting window 614b. The first surface 611 of the base portion 61 is covered by the lid portion 66, and the second surface 612 is covered by the drive circuit board 63, so that the gas supply groove 614 forms (defines) an intake path.

[0015] The gas introduction assembly mounting area 615 is formed by recessing the second surface 612, and is connected to the gas supply groove 614. A through hole 615a is provided through the bottom surface. The gas discharge groove 616 is provided with an exhaust port 616a. The exhaust port 616a is arranged corresponding to the exhaust frame opening 661b of the lid portion 66. The gas discharge groove 616 includes a first portion 616b formed by recessing the first surface 611 corresponding to the vertical projection area of ​​the gas introduction assembly mounting area 615, and a second portion 616 extending to an area different from the vertical projection area of ​​the gas introduction assembly mounting area 615, and a second portion 616c formed by digging from the first surface 611 to the second surface 612 (by recessing the first surface 611 to the second surface 612). The first portion 616b and the second portion 616c are connected to form a step, and the first portion 616b of the gas discharge groove 616 is connected to the through hole 615a of the gas introduction assembly mounting area 615, and the second portion 616c of the gas discharge groove 616 is connected to the exhaust port 616a. With this structure, when the first surface 611 of the base portion 61 is covered by the lid portion 66 and the second surface 612 is covered by the drive circuit board 63, the gas discharge groove 616 forms an exhaust path.

[0016] As shown in FIG. 5, the laser assembly 64 and the particle sensor 65 are disposed on the driving circuit board 63 and in the base part 61, but in FIG. 5, the driving circuit board 63 is intentionally omitted in order to clearly show the positions of the laser assembly 64, the particle sensor 65 and the base part 61. As shown in FIG. 5 and FIG. 3C, the laser assembly 64 is accommodated in the laser installation area 613 of the base part 61, and the particle sensor 65 is accommodated in the gas supply groove 614 of the base part 61 and is aligned with the laser assembly 64. The laser assembly 64 is installed to correspond to the light-transmitting window 614b to transmit the laser light emitted by the laser assembly 64. As a result, the laser light irradiates the inside of the gas supply groove 614, and the path of the irradiation beam emitted by the laser assembly 64 passes through the light-transmitting window 614b and is perpendicular to the gas supply groove 614.

[0017] The irradiation beam emitted by the laser assembly 64 passes through the light-transmitting window 614b and enters the gas supply groove 614, irradiating the suspended particles contained in the gas in the gas supply groove 614. When the beam irradiates the suspended particles, a projected light spot (projection) is formed by light scattering, and the particulate sensor 65 detects and calculates the projected light spot formed by light scattering, thereby obtaining information on the particle diameter and concentration (amount) of the suspended particles contained in the gas. In this embodiment, the particulate sensor 65 is a PM2.5 sensor, but the present invention is not limited thereto.

[0018] 6A and 6B, the piezoelectric actuator 62 is accommodated in a gas introduction assembly mounting area 615 of the base portion 61, and the gas introduction assembly mounting area 615 is square-shaped, with positioning block members 615b provided at the four corners. The piezoelectric actuator 62 is installed in the gas introduction assembly mounting area 615 via the four positioning block members 615b. The gas introduction assembly mounting area 615 is connected to a gas supply groove 614, and when the piezoelectric actuator 62 is operated, the gas in the gas supply groove 614 is sucked into the piezoelectric actuator 62, and the gas flows into the gas discharge groove 616 via a through hole 615a of the gas introduction assembly mounting area 615.

[0019] As shown in FIGS. 7A and 7B, the piezoelectric actuator 62 includes an injection hole piece member 621, a chamber frame 622, an actuator 623, an insulating frame 624, and a conductive frame 625.

[0020] The injection hole piece member 621 is made of a flexible material and includes a floating sheet member 621a and a hollow hole 621b. The floating sheet member 621a is a sheet-like structure capable of bending and vibrating, and its shape and dimensions generally correspond to the inner edge of the gas introduction assembly mounting area 615, but the present invention is not limited thereto. The floating sheet member 621a has a square, circular, elliptical, triangular or polygonal shape. The hollow hole 621b penetrates the center of the floating sheet member 621a so that gas can flow therethrough.

[0021] The chamber frame 622 is disposed on the injection hole piece member 621 and its outer shape corresponds to that of the injection hole piece member 621. The actuator 623 is disposed on the chamber frame 622 and forms a resonating chamber 626 between the chamber frame 622 and the floating sheet member 621a. The insulating frame 624 is disposed on the actuator 623 and its appearance is similar to that of the chamber frame 622. The conductive frame 625 is disposed on the insulating frame 624 and its appearance is similar to that of the insulating frame 624. The conductive frame 625 includes a conductive connection pin 625a and a conductive electrode 625b, and the conductive connection pin 625a extends outward from the outer edge of the conductive frame 625. The conductive electrode 625b extends inward from the inner edge of the conductive frame 625. The actuator 623 further includes a piezoelectric carrier plate 623a, an adjusted resonating plate 623b, and a piezoelectric plate 623c. The piezoelectric carrier plate 623a is disposed on the chamber frame 622, the adjusted resonant plate 623b is disposed on the piezoelectric carrier plate 623a, and the piezoelectric plate 623c is disposed on the adjusted resonant plate 623b. The adjusted resonant plate 623b and the piezoelectric plate 623c are housed in an insulating frame 624 and electrically connected to the piezoelectric plate 623c through a conductive electrode 625b of a conductive frame 625. The piezoelectric carrier plate 623a and the adjusted resonant plate 623b are both made of a material capable of conducting electricity. The piezoelectric carrier plate 623a includes a piezoelectric pin 623d. The piezoelectric pin 623d and the conductive connection pin 625a are connected to a driving circuit (not shown) on the driving circuit board 63 to receive a driving signal (driving frequency and driving voltage). A driving signal can be communicated to a circuit formed by the piezoelectric pin 623d, the piezoelectric carrier plate 623a, the tuned resonant plate 623b, the piezoelectric plate 623c, the conductive electrode 625b, the conductive frame 625, and the conductive connection pin 625a, and the insulating frame 624 prevents a short circuit by electrically isolating the conductive frame 625 and the actuator 623. This allows the driving signal to be transmitted to the piezoelectric plate 623c.After receiving a driving signal (driving frequency and driving voltage), the piezoelectric plate 623c is deformed due to the piezoelectric effect, and the deformation drives the piezoelectric carrier plate 623a and the tuned resonating plate 623b to vibrate in a reciprocating bending manner.

[0022] As mentioned above, the adjusted resonant plate 623b is located between the piezoelectric plate 623c and the piezoelectric carrier plate 623a, and is used as a buffer between them, so that the vibration frequency of the piezoelectric carrier plate 623a can be adjusted. Basically, the thickness of the adjusted resonant plate 623b is thicker than that of the piezoelectric carrier plate 623a, and the thickness of the adjusted resonant plate 623b can be changed, so that the vibration frequency of the actuator 623 can be adjusted.

[0023] As shown in Figures 8A and 8B, the piezoelectric actuator 62 is housed (arranged) on the positioning block member 615b of the gas introduction assembly mounting area 615 of the base portion 61, and forms multiple gaps 617 between the floating sheet member 621a and the positioning block member 615b of the gas introduction assembly mounting area 615, and between the floating sheet member 621a and the side edges of the gas introduction assembly mounting area 615, thereby allowing gas to flow.

[0024] As shown in FIG. 8A, the injection hole piece member 621, the chamber frame 622, the actuator 623, the insulating frame 624 and the conductive frame 625 are arranged in a stacked manner (arranged one layer on top of the other) and are arranged in the gas introduction assembly mounting area 615. An airflow chamber 627 is formed between the injection hole piece member 621 and the bottom surface (not indicated) of the gas introduction assembly mounting area 615. The airflow chamber 627 is connected to the resonating chamber 626 between the actuator 623, the chamber frame 622 and the floating sheet member 621a through the hollow hole 621b of the injection hole piece member 621. By controlling the vibration frequency of the gas in the resonating chamber 626 to be close to the vibration frequency of the floating sheet member 621a, the resonating chamber 626 and the floating sheet member 621a can generate the Helmholtz resonance effect, thereby improving the efficiency of gas transportation.

[0025] 8B, when the piezoelectric plate 623c moves away from the bottom surface of the gas introduction assembly mounting area 615, the floating sheet member 621a of the injection hole piece member 621 is driven to move away from the bottom surface of the gas introduction assembly mounting area 615. This causes the volume of the airflow chamber 627 to expand rapidly, the internal pressure to drop and negative pressure to be formed, and the gas outside the piezoelectric actuator 62 is sucked in to flow through the multiple gaps 617, and then flows into the resonating chamber 626 through the hollow hole 621b. This causes the air pressure inside the resonating chamber 626 to increase, generating a pressure gradient. As shown in FIG. 8C, when the floating sheet member 621a of the injection hole piece member 621 moves toward the bottom surface of the gas introduction assembly mounting area 615 by driving the piezoelectric plate 623c, the gas in the resonance chamber 626 flows out rapidly through the hollow hole 621b, the gas in the airflow chamber 627 is compressed, and the accumulated (gathered, merged) gas is quickly ejected in a large amount in a state of ideal gas close to Bernoulli's law. According to the principle of inertia, if the air pressure inside the resonance chamber 626 after exhaust is lower than the equilibrium air pressure, the gas will be guided back into the resonance chamber 626. Therefore, by repeating the operations of FIG. 8B and FIG. 8C, the piezoelectric plate 623c can be vibrated back and forth, and the vibration frequency of the gas in the resonance chamber 626 can be controlled to approach the vibration frequency of the piezoelectric plate 623c. This generates the Helmholtz resonance effect, and it is possible to transport a large amount of gas at high speed.

[0026] As shown in FIG. 9A to FIG. 9C, the gas enters through the intake frame opening 661a of the cover 66, passes through the intake port 614a, enters the gas supply groove 614 of the base 61, and flows to the position of the particle sensor 65. Also, as shown in FIG. 9B, the continuous driving of the piezoelectric actuator 62 sucks in the gas in the intake path, promoting the rapid introduction and stable flow of the external gas, and passes above the particle sensor 65. At this time, the irradiation beam emitted by the laser assembly 64 passes through the light-transmitting window 614b and enters the gas supply groove 614, irradiating the suspended particles contained in the gas passing above the particle sensor 65 of the gas supply groove 614. When the beam irradiates the suspended particles, the light is scattered to form a projected light spot. The particle sensor 65 can sense and calculate the projected light spot formed by the light scattering, and obtain information on the particle diameter and concentration (amount) of the suspended particles contained in the gas. The gas above the particle sensor 65 is transported by the continuous driving of the piezoelectric actuator 62, introduced into the through-hole 615a of the gas introduction assembly mounting area 615, and flows into the first portion 616b of the gas discharge groove 616. Finally, as shown in Fig. 9C, after the gas enters the first portion 616b of the gas discharge groove 616, the piezoelectric actuator 62 continuously transports the gas into the first portion 616b, so that the gas in the first portion 616b is pushed into the second portion 616c, and finally, it passes through the exhaust port 616a and the exhaust frame opening 661b and is discharged to the outside.

[0027] As shown in FIG. 10, the base 61 further includes a light trap (or beam dump) area 618. The light trap area 618 is formed (recessed) by digging from the first surface 611 to the second surface 612, and corresponds to the laser installation area 613. The light trap area 618 allows the light beam emitted by the laser assembly 64 to be projected inside through the light-transmitting window 614b. The light trap area 618 is provided with a light trap structure 618a having a conical surface, and the light trap structure 618a corresponds to the path of the light beam emitted by the laser assembly 64. In addition, the light trap structure 618a can prevent the illumination beam emitted by the laser assembly 64 from being reflected into the light trap area 618 at the conical surface structure, and the light beam from being reflected to the position of the particle sensor 65. There is a light trap distance D between the position of the illumination beam received by the light trap structure 618a and the light-transmitting window 614b, and the light trap distance D is 3 mm or more. If the light trap distance D is less than 3 mm, the illumination beam projected on the light trap structure 618a is reflected, and much of the scattered light (light reflected in each direction) is reflected directly to the position of the particle sensor 65, causing distortion in the detection accuracy.

[0028] As shown in FIG. 10 and FIG. 3C, the particle detection module 6 of the present invention can detect not only particles in gas but also the characteristics of the introduced gas. Examples of the gas include formaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, and ozone. Therefore, the particle detection module 6 of the present invention can further include a volatile organic sensor 67. The volatile organic sensor 67 is disposed on the drive circuit board 63 so as to be electrically connected to the drive circuit board 63, and is housed in the gas exhaust groove 616, and is used to detect the gas led out by the exhaust path so as to detect the concentration and characteristics of the volatile organic compounds contained in the gas in the exhaust path. In addition, the volatile organic sensor 67 is disposed on the drive circuit board 63 so as to be electrically connected to the drive circuit board 63, and is housed (disposed) in the light trap area 618, and is used to detect the concentration and characteristics of the volatile organic compounds contained in the gas that has passed through the intake path of the gas supply groove 614 and has passed through the light-transmitting window 614b and introduced into the light trap area 618.

[0029] As described above, in the gas detection device provided by the present invention, the particle detection module can detect airborne particles (e.g., PM10, PM2.5, PM1) in the environment, and the temperature and humidity sensor can detect the temperature and humidity of the environment. The detected airborne particle information, temperature and humidity information can be sent to the control processing board, and after processing, a communication signal can be formed. The network module can activate the Internet of Things (IOT) and send a communication signal to the cloud processing device to implement gas detection of the indoor air pollution prevention and control system. The acquired information data can not only be displayed, warned, and notified on the indoor display device, but also be warned and notified on the application (APP) of the mobile device. In addition, the acquired information data can be used for intelligent comparison of the cloud processing device and comparison using big data, and the cloud processing device can send a communication command to operate the indoor gas cleaning and exchange filtering device (e.g., purifier, ventilation fan, range hood, outdoor air fan, etc.) accordingly, and can perform cleaning and removal of indoor air pollution. The gas detection device configured in this manner performs gas detection for an indoor air pollution prevention and control system, transmits air quality information data to the system in real time, and promotes the formation of clean and safe breathing gas conditions in indoor spaces, and has industrial applicability and inventive step. [Explanation of symbols]

[0030] 1: Housing 11: Upper housing 12: Lower housing 121: Groove 122: Ventilation hole 123: Engagement hole structure 2: External plug parts 3: Power converter 4: Control processing board 5: Network module 6: Particle detection module 61: Base section 611: 1st surface 612: 2nd surface 613: Laser installation area 614: Gas supply groove 614a: Air intake 614b:Transparent window 615: Gas introduction assembly mounting area 615a: Through hole 615b: Positioning block member 616: Gas exhaust groove 616a: Exhaust port 616b: Part 1 616c:Second part 617: Gap 618: Light trap area (beam damper area) 618a: Light trap structure (beam damper structure) 62: Piezoelectric actuator 621: Injection hole piece member 621a: Floating sheet member 621b: Hollow hole 622: Chamber frame 623: Actuator 623a: Piezoelectric carrier plate 623b: Tuned resonating plate 623c: Piezoelectric plate 623d: Piezoelectric pin 624: Insulating frame 625: Conductive frame 625a: Conductive connection pin 625b: Conductive electrode 626: Resonating chamber 627: Airflow chamber 63: Drive circuit board 64: Laser Assembly 65: Particle sensor 66: Lid 661: Side plate 661a: Intake frame opening 661b: Exhaust frame opening 67: Volatile organic matter sensor 7: Temperature and humidity sensor 8: Flexible board 9: Switch D: Light trap distance (distance from the bottom of the beam damper to the transparent window)

Claims

1. A gas detection device comprising a housing, an external plug member, a power converter, a control processing board, a network module, a particle detection module, and a temperature and humidity sensor, The housing includes an upper housing and a lower housing, a plurality of ventilation holes are provided on a side edge of the lower housing, an engagement hole structure is provided on a lower edge of the lower housing, and a recessed groove is formed on a bottom surface of the lower housing; the external plug member is pivotally connected to the lower housing, can be folded and accommodated in the groove so as not to protrude outside, and can be pulled out of the groove so as to be exposed outside the lower housing when connecting to an external power source; the power converter is electrically connected to the external plug member, converts the external power source into a necessary DC power source, and outputs the DC power source; The control processing board is electrically connected to the power converter to provide a startup power source, and receives and processes a plurality of information data, and converts the information data into communication data; the network module is disposed on the upper housing side and packaged together with the control processing board in an integrated circuit, and receives the communication data processed by the control processing board and outputs the data to the outside; the particle detection module is disposed on an inner side of a bottom surface of the lower housing, adjacent to the side of the control processing board opposite to the side to which the network module is attached, and is electrically connected to the control processing board via a first flexible substrate; the particle detection module obtains the information data of the gas by detecting the gas; the information data is transmitted to the control processing board and converted into the communication data, and transmitted to the outside via the network module; The gas detection device is characterized in that the temperature and humidity sensor is arranged on the lower housing side and electrically connected to the control processing board via a second flexible substrate, and obtains the information data of the temperature and humidity by detecting temperature and humidity, and the information data is transmitted to the control processing board and converted into the communication data, and then transmitted to the outside via the network module.

2. 2. The gas detection device of claim 1, wherein the external plug member is a power connector, a USB port, a mini USB port, a Micro USB port, or a USB Type C port.

3. The gas detection device of claim 1, characterized in that when the external plug member is plugged into the external power source, the entire gas detection device is positioned by penetrating the engagement hole structure into an engagement member provided on the external power socket, and the network module is a wireless network communication module of a cloud computing service, the network module is arranged on the upper housing side and is directly exposed to the outside of the gas detection device to facilitate reception or transmission of communication signals, and is less susceptible to interference with communication signals due to electromagnetic shielding of the control processing board.

4. the particle detection module detects gas introduced through the air hole of the housing, the particle detection module including a base portion, a piezoelectric actuator, a drive circuit board, a laser assembly, a particle sensor, and a cover portion; the base portion includes a first surface, a second surface, a laser mounting area, a gas supply groove, a gas introduction assembly mounting area, and a gas exhaust groove; the second surface and the first surface are positioned opposite each other; the laser placement area is formed by recessing the first surface toward the second surface; the gas supply groove is formed by recessing the second surface and is adjacent to the laser installation area, the gas supply groove is provided with an intake port communicating with the outside of the base portion, and a light-transmitting window is formed on a side wall of the gas supply groove to communicate with the laser installation area; the gas introduction assembly mounting area is formed by recessing the second surface, and is connected to the gas supply groove, and a through hole is formed in the bottom surface; the gas discharge groove is formed by recessing the first surface to a bottom surface of the gas introduction assembly mounting area in a region corresponding to a vertical projection region of the gas introduction assembly mounting area, and the gas discharge groove is formed by recessing the first surface toward the second surface to the second surface in a region not corresponding to the vertical projection region of the gas introduction assembly mounting area, and is connected to the through hole, and an exhaust port communicating with the outside of the base portion is provided in the gas discharge groove, The piezoelectric actuator is housed in the gas introduction assembly mounting area, the drive circuit board is attached to cover the second surface of the base portion, The laser assembly is positioned on the drive circuit board so as to be electrically connected to the drive circuit board, and is housed in the laser installation area, and an emitted light beam path passes through the light-transmitting window and is perpendicular to a direction in which the gas supply groove extends; the particle sensor is positioned on the drive circuit board so as to be electrically connected to the drive circuit board, and is accommodated in a position corresponding to an orthogonal position between the gas supply groove and the light beam path emitted by the laser assembly, and detects particles passing through the gas supply groove and irradiated by the irradiation beam emitted by the laser assembly; the lid portion covers the first surface of the base portion and includes a side panel, the side panel including an intake frame opening and an exhaust frame opening at positions corresponding to the intake port and the exhaust port of the base portion, respectively; 2. The gas detection device of claim 1, wherein the lid portion is covered on the first surface of the base portion and the drive circuit board is covered on the second surface, the lid portion, the drive circuit board and the gas supply groove define an intake path, and the lid portion, the drive circuit board and the gas exhaust groove define an exhaust path, the piezoelectric actuator accelerates the flow of external gas and guides the external gas through the intake frame opening and into the intake path defined by the gas supply groove, and causes the gas to pass above the particle sensor so as to detect the concentration of fine particles in the gas, and the detected gas is guided by the piezoelectric actuator to be discharged from the exhaust path defined by the gas exhaust groove through the through hole, and is discharged from the exhaust frame opening to the vent hole.

5. The gas detection device of claim 4, characterized in that positioning block members for embedding and positioning the piezoelectric actuator are provided at the four corners of the gas introduction assembly mounting area, the base portion further comprises a light trapping area, the light trapping area is formed by recessing the first surface toward the second surface and corresponds to the laser mounting area, the light trapping area comprises a light trapping structure having a conical surface, the light trapping structure is provided to correspond to the light beam path, and the particulate sensor is a PM2.5 sensor.

6. 6. The gas detection device according to claim 5, wherein the light trap structure has a light trap distance between a position where it receives light from an irradiated light source and the light-transmitting window, the light trap distance being 3 mm or more.

7. The piezoelectric actuator includes an injection piece member, an actuator, an insulating frame, and a conductive frame. The injection hole piece member comprises a floating sheet member and a hollow hole, the floating sheet member is capable of bending and vibrating, the hollow hole is formed in the center of the floating sheet member, and the piezoelectric actuator is provided on a positioning block member of the gas introduction assembly mounting area of ​​the base portion, forming an airflow chamber at the bottom of the injection hole piece member, and a plurality of gaps are defined between the floating sheet member and the positioning block member of the gas introduction assembly mounting area, and between the floating sheet member and the side of the gas introduction assembly mounting area, for gas to flow through the gaps; The chamber frame is attached so as to be stacked on the floating sheet member, The actuator is mounted on the chamber frame in a stacked manner and receives a voltage to generate a reciprocating bending vibration; the insulating frame is attached to be stacked on the actuator; the conductive frame is attached to the insulating frame in a stacked manner; The gas detection device described in claim 5, characterized in that a resonant chamber is formed between the actuator, the chamber frame, and the floating sheet member, and by driving the actuator, the injection hole piece member is resonantly driven to transport gas so that the gas flows into the airflow chamber through the gap and is discharged, and the floating sheet member of the injection hole piece member vibrates back and forth and is displaced.

8. the actuator comprises, in order, a piezoelectric carrier plate, a tuned resonator plate, and a piezoelectric plate; the piezoelectric carrier plate is mounted in a stacked manner on the chamber frame; the tuned resonator plate is mounted in a stacked manner on the piezoelectric carrier plate; 8. The gas detection device of claim 7, wherein a piezoelectric plate is mounted in a stacked manner on the tuned resonating plate and receives a voltage to cause the piezoelectric carrier plate and the tuned resonating plate to vibrate in a reciprocating bending motion.

9. The gas sensing device of claim 5 , wherein the particulate detection module further comprises a volatile organics sensor.

10. 10. The gas detection device of claim 9, wherein the volatile organic sensor is positioned on the drive circuit board so as to be electrically connected to the drive circuit board, and is housed in the gas exhaust groove or the light trap area, and when housed in the gas exhaust groove, detects gas drawn out by the exhaust path, and when housed in the light trap area, detects gas passing through the intake path of the gas supply groove and introduced into the light trap area through the light-transmitting window.

Images