TWI693388B - Gas detecting device - Google Patents

Abstract

A gas detecting device is disclosed and comprises a casing, a light structure, a gas transmission actuator, a laser module, a micro particle sensor and an external sensor module. The casing comprises a chamber, at least one outlet, at least one inlet and at least one communicating channel, and the chamber communicates with the outlet, the inlet and the communicating channel. The light structure is disposed within the casing and has a gas channel and a light channel, the gas channel communicates with the inlet and the outlet, the light channel communicates with the gas channel. The gas transmission actuator is disposed within the light structure. The laser module is disposed within the light structure for emitting a light beam into the gas channel. The micro particle sensor is disposed within the gas channel. When the laser module emits the light beam into the gas channel to irradiate the gas therein, the suspended particle within the gas projects light spots, and the projected light spots is detected by the micro particle sensor. The external sensor module is disposed within the communicating channel for detecting the air in the communicating channel.

Description

Gas detection device

This case relates to a gas detection device, especially a gas detection device that conducts gas through a gas transmission actuator.

In recent years, the air pollution problem in my country and neighboring areas has become increasingly serious, especially the concentration data of fine suspended particulates (PM2.5 and PM10) are often too high, and the monitoring of the concentration of air suspended particulates has gradually received attention. However, since the air will flow with the change of wind direction and volume, most of the air quality monitoring stations for detecting suspended particulates are fixed points, so it is impossible to confirm the concentration of suspended particulates in the current surroundings, so a small and convenient gas particulate detection device is needed To allow users to detect the concentration of suspended particles in the surrounding environment anytime, anywhere.

In addition, current gas particle detection devices can often only detect a single gas, but in addition to suspended particles, there are still many harmful gases in daily life. If it cannot be detected in real time, it will also affect human health. .

In addition, users will have different gas detection needs in different places, such as factories, offices, and homes. For example, factories need gas sensors that are volatile or cause toxic gases such as inhalation injury. It is a sensor of carbon monoxide, carbon dioxide, temperature, humidity, etc., but the gas detection devices currently on the market are all integrated gas detection devices, the gas detected by them has been determined before leaving the factory, and cannot be determined according to user needs. The change causes the gas detection device to detect gas that is not required by the user or fails to detect The gas required by the user is very inconvenient, and it is difficult for the user to select a suitable gas detection device. In view of this, how to develop a gas detection device that can sense according to gas detection needs is currently an extremely important topic.

The main purpose of this case is to provide a gas detection device that can detect the concentration of suspended particles contained in the air and the concentration of other gases, and provide users with real-time and accurate gas information. Among them, the sensor used to detect the air is an external sensor, which can be used by the user according to needs and can be easily replaced, increasing convenience.

A broad implementation aspect of the case is a gas detection device, including: a housing with a chamber, at least one air inlet, an air outlet and at least one connection channel, the chamber is connected to the air inlet, air outlet and The channels communicate with each other; a light mechanism, located in the chamber, has a gas flow channel and a light beam channel, the gas flow channel communicates with the air inlet and the gas outlet, the light beam channel communicates with the gas flow channel; a gas transmission actuator is constructed on The light mechanism is used to actuate and guide the air into the chamber from the air inlet, and then into the gas flow channel through the connection channel; a laser module is installed in the light mechanism to irradiate the beam channel In the gas flow channel; a particle sensor is provided in the gas flow channel away from the end of the gas transmission actuator to detect the projected light spot generated by suspended particles after the light beam irradiates the gas in the gas flow channel, thereby Detect and calculate the size and concentration of suspended particles contained in the air; at least one external sensing module, connected to the connection channel, includes a sensor for sensing the gas in the connection channel.

100: gas detection device

1: shell

11: chamber

12: Air inlet

13: Outlet

14: connection channel

2: Light mechanism

21: Gas flow path

22: Beam channel

23: Light source setting slot

24: accommodating slot

24a: underside

24b: side wall

3: gas transmission actuator

31: Air intake plate

31a: Air inlet

31b: bus bar

31c: Confluence chamber

32: Resonance film

32a: Central hole

32b: movable part

33: Piezo actuator

33a: Suspended board

33b: Outer frame

33c: bracket

33d: Piezo element

33e: clearance

33f: convex part

34: The first insulating sheet

35: conductive sheet

351: conductive pin

352: electrode

36: Second insulating sheet

37: chamber space

4: Laser module

5: Particle sensor

6: External sensing module

7: Drive components

71: Battery module

72: Communication module

73: processor

8: gas transmission actuator

81: Jet orifice

81a: connector

81b: suspended tablets

81c: Central hole

81d: gap

82: cavity frame

83: actuator

83a: Piezo carrier

83b: Adjust the resonance plate

83c: Piezoelectric film

83d: the first conductive pin

84: insulating frame

85: conductive frame

85a: second conductive pin

85b: electrode part

86: Vibration chamber

87: Airflow chamber

200: Power supply device

300: External link device

Figure 1 is a schematic view of the three-dimensional structure of the gas detection device in this case.

Figure 2 is a schematic cross-sectional view of the gas detection device in this case.

FIG. 3A is a three-dimensional exploded schematic view of the gas transmission actuator of a preferred embodiment of the gas detection device of the present invention as viewed from above.

FIG. 3B is a three-dimensional exploded schematic view of the gas transmission actuator of a preferred embodiment of the gas detection device of the present invention as viewed from above.

FIG. 4A is a schematic cross-sectional view of a gas transmission actuator of a preferred embodiment of the gas detection device in this case.

4B to 4D are schematic diagrams of the operation of the gas transmission actuator of a preferred embodiment of the gas detection device of the present invention.

FIG. 5 is a schematic cross-sectional view of a gas transmission actuator of another preferred embodiment of the gas detection device of the present invention.

FIG. 6 is an exploded schematic view of the gas transmission actuator of another preferred embodiment of FIG. 5 in this case.

FIG. 7A is a schematic cross-sectional view of another preferred embodiment of the gas transmission actuator of FIG. 6 in FIG. 6.

FIGS. 7B to 7C are schematic diagrams of the operation of the gas transmission actuator of another preferred embodiment of FIG. 7A.

Figure 8 is a schematic diagram of the system of the gas detection device in this case.

Some typical embodiments embodying the characteristics and advantages of this case will be described in detail in the description in the following paragraphs. It should be understood that this case can have various changes in different forms, which all do not deviate from the scope of this case, and the descriptions and illustrations therein are essentially used for explanation rather than to limit this case.

This case provides a gas detection device 100, please refer to FIG. 1 and FIG. 2 at the same time. In the embodiment of the present invention, the gas detection device 100 includes a housing 1, a light mechanism 2, a gas transmission actuator 3, a laser module 4, a particle sensor 5, and at least one external sensing module 6. 1 case There is a chamber 11, at least one air inlet 12, an air outlet 13 and at least one connecting channel 14. The chamber 11 communicates with at least one air inlet 12, air outlet 13 and at least one connecting channel 14. The light mechanism 2 is disposed in the chamber 11 of the housing 1 and has a gas flow channel 21 and a beam channel 22. The gas flow channel 21 communicates with at least one gas inlet 12 and gas outlet 13, and the beam channel 22 communicates with the gas flow channel 21. The gas transmission actuator 3 is based on the light mechanism 2. By actuating the gas transmission actuator 3, the gas pressure inside the chamber 11 is changed, so that the gas can enter the chamber 11 through at least one air inlet 12, and then pass through at least A connecting channel 14 enters the gas flow channel 21 and finally exits the housing 1 through the gas outlet 13. The laser module 4 is disposed in the light mechanism 2 to emit a light beam, and the light beam irradiates the gas flow channel 21 through the light beam channel 22. The particle sensor 5 is provided at one end of the gas flow path 21 away from the gas transmission actuator 3. When the beam projected by the laser module 4 irradiates the gas in the gas flow channel 21, the suspended particles in the gas will generate a plurality of projected light spots. The particle sensor 5 receives the plurality of projected light spots and calculates the suspended particles in the air The size and concentration. At least one external sensing module 6 is detachably assembled in at least one connecting channel 14, wherein the at least one connecting channel 14 and the at least one external sensing module 6 are mutually assembled. In this embodiment, the number of the connection channel 14 and the external sensing module 6 may be five, but not limited to this. The external sensing module 6 includes a sensor (not shown). The sensor may be one or a combination of an oxygen sensor, a carbon monoxide sensor, and a carbon dioxide sensor, or may be A volatile organic compound sensor can also be one or a combination of bacteria sensor, virus sensor and microbial sensor, or the sensor can be a temperature sensor or a humidity sensor One of the devices or a combination thereof.

Please continue to refer to FIG. 2, the light mechanism 2 further has a light source setting groove 23 and an accommodating groove 24. The light source setting groove 23 is in communication with the beam channel 22, and the accommodating groove 24 is disposed in the gas flow channel 21 away from the particle sensor 5 Is used to accommodate the gas transmission actuator 3. When the gas transmission actuator 3 is driven, the air outside the housing 1 will enter the chamber 11 through the air inlet 12, and then the gas The transmission actuator 3 introduces the gas from the chamber 11 into the gas flow channel 21. At this time, the laser module 4 emits a beam into the beam channel 22 to irradiate the gas in the gas flow channel 21, and the suspended particles in the gas are subjected to the beam The scattering phenomenon occurs after the irradiation, and the particle sensor 5 receives the light spot generated by the suspended particles irradiated by the light beam, thereby calculating the size and concentration of the suspended particles in the air. The suspended particles may be PM2.5 suspended particles or PM10 suspended particles. At the same time, the external sensing module 6 in the connecting channel 14 communicating with the chamber 11 uses its sensor to detect the gas flowing into the connecting channel 14 to measure the content of a specific gas in the air.

Please refer to FIG. 3A, FIG. 3B and FIG. 4A at the same time. In the embodiment of the present invention, the gas transmission actuator 3 is a piezoelectric pump, including an intake plate 31, a resonance plate 32, and a piezoelectric actuator. 33, a first insulating sheet 34, a conductive sheet 35 and a second insulating sheet 36. The air intake plate 31, the resonance sheet 32, the piezoelectric actuator 33, the first insulating sheet 34, the conductive sheet 35, and the second insulating sheet 36 are sequentially stacked and combined.

In the embodiment of the present application, the air inlet plate 31 has at least one air inlet hole 31a, at least one bus bar 31b, and a bus chamber 31c. At least one bus bar groove 31b is provided corresponding to at least one air inlet hole 31a. The gas inlet 31a supplies gas, and the bus bar 31b guides the gas introduced from the gas inlet 31a to the sink chamber 31c. The resonance plate 32 has a central hole 32a and a movable portion 32b. The central hole 32a is provided corresponding to the confluence chamber 31c of the intake plate 31. The movable portion 32b is provided around the central hole 32a. A cavity space 37 is formed between the resonance plate 32 and the piezoelectric actuator 33. Therefore, when the piezoelectric actuator 33 is driven, gas will be introduced through at least one air inlet hole 31a of the air inlet plate 31, and then be collected into the confluence chamber 31c through at least one bus bar 31b. Next, the gas passes through the central hole 32a of the resonance plate 32, so that the piezoelectric actuator 33 and the movable portion 32b of the resonance plate 32 resonate to transmit the gas.

Please refer to FIGS. 3A, 3B, and 4A. The piezoelectric actuator 33 includes a floating plate 33a, an outer frame 33b, at least one bracket 33c, and a piezoelectric element 33d. In the embodiment of the present invention, the suspension board 33a has a square shape and can be bent and vibrated, but not limited to this. The floating plate 33a has a convex portion 33f. In the embodiment of the present invention, the reason why the suspension board 33a adopts the square shape design is that the structure of the square suspension board 33a obviously has the advantage of power saving compared with the circular shape. For a capacitive load operating at a resonant frequency, the power consumption will increase as the resonant frequency increases. Since the resonant frequency of the square suspension plate 33a is lower than that of the circular suspension plate, the power consumption will also be lower. However, in other embodiments, the shape of the suspension plate 33a may vary according to actual needs. The outer frame 33b is arranged around the outer side of the suspension plate 33a. At least one bracket 33c is connected between the suspension board 33a and the outer frame 33b to provide a supporting force for elastically supporting the suspension board 33a. The piezoelectric element 33d has a side length that is less than or equal to one side length of the floating plate 33a. Moreover, the piezoelectric element 33d is attached to a surface of the suspension plate 33a for applying a driving voltage to drive the suspension plate 33a to bend and vibrate. At least one gap 33e is formed between the floating plate 33a, the outer frame 33b and the at least one bracket 33c for the gas to pass through. The convex portion 33f is convexly provided on the other surface of the floating plate 33a. In the embodiment of the present invention, the suspension plate 33a and the convex portion 33f are an integrally formed structure manufactured by an etching process, but not limited to this.

Please refer to FIG. 4A. In the embodiment of the present invention, the cavity space 37 can be filled with a material, such as a conductive adhesive, by using the gap generated between the resonance plate 32 and the piezoelectric actuator 33 outer frame 33b. This is limited, so that a certain depth can be maintained between the resonance plate 32 and the suspension plate 33a, which can guide the gas to flow more quickly. In addition, since the suspension plate 33a and the resonance sheet 32 are kept at an appropriate distance, the contact interference between them is reduced, and the generation of noise can also be reduced. In other embodiments, the thickness of the conductive adhesive filled in the gap between the resonator plate 32 and the piezoelectric actuator 33 outer frame 33b can be reduced by increasing the height of the outer frame 33b of the piezoelectric actuator 33 . In this way, under the condition that the suspension plate 33a and the resonant sheet 32 can still be maintained at an appropriate distance, the overall assembly of the gas transmission actuator 3 will not affect the thickness of the conductive paste filled due to the hot pressing temperature and the cooling temperature, which can avoid conduction The thermal expansion and contraction of the glue affects the actual size of the chamber space 37 after the assembly is completed. In other embodiments, the suspension plate 33a may be formed by stamping, so that the convex portion 33f of the suspension plate 33a is away from a surface of the piezoelectric element 33d and the outer frame A surface of 33b far away from the piezoelectric element 33d forms a non-coplanar surface, that is, the surface of the convex portion 33f away from the piezoelectric element 33d will be lower than the surface of the outer frame 33b away from the piezoelectric element 33d. A small amount of filling material is applied on the surface of the outer frame 33b away from the piezoelectric element 33d, for example: conductive adhesive, and the piezoelectric actuator 33 is bonded to the resonance plate 32 by hot pressing, thereby enabling the piezoelectric actuator 33 to Combined with resonance plate 32. By forming the suspension plate 33a of the piezoelectric actuator 33 by stamping to improve the structure of the chamber space 37, the chamber space 37 can be adjusted by adjusting the stamping distance of the suspension plate 33a of the piezoelectric actuator 33 The completion effectively simplifies the structural design steps of adjusting the chamber space 37. At the same time, it also has the advantages of simplifying the process and shortening the process time. In the embodiment of the present invention, the first insulating sheet 34, the conductive sheet 35, and the second insulating sheet 36 are all frame-shaped thin sheets, but not limited thereto.

Please refer to FIG. 3A, FIG. 3B and FIG. 4A, the air intake plate 31, the resonance plate 32, the piezoelectric actuator 33, the first insulating sheet 34, the conductive sheet 35 and the second insulating sheet 36 are all The process of electromechanical surface micro-machining technology reduces the volume of the gas transmission actuator 3 to form a gas transmission actuator 3 of a micro-electromechanical system.

Please refer to FIG. 4B. In the actuation process of the piezoelectric actuator 33, the piezoelectric element 33d of the piezoelectric actuator 33 is deformed when a driving voltage is applied, causing the suspension plate 33a to move away from the intake plate 31. At this time, the volume of the chamber space 37 is increased, a negative pressure is formed in the chamber space 37, and the gas in the confluence chamber 31c is drawn into the chamber space 37. At the same time, the resonance piece 32 generates resonance and is displaced in a direction away from the intake plate 31, which increases the volume of the confluence chamber 31c. Moreover, due to the relationship between the gas in the confluence chamber 31c entering the chamber space 37, the confluence chamber 31c is also in a negative pressure state, and then the gas is sucked into the confluence chamber 31c through the air inlet hole 31a and the confluence groove 31b.

Next, as shown in FIG. 4C, the piezoelectric element 33d drives the floating plate 33a to move toward the intake plate 31 and compresses the chamber space 37. Similarly, the resonance plate 32 is actuated by the floating plate 33a to generate resonance and move toward the intake plate 31 Displacement, forcing the gas in the chamber space 37 to be pushed synchronously The gap 33e is further transmitted to achieve the effect of transmitting gas.

Finally, as shown in FIG. 4D, when the floating plate 33a is driven back to the state not driven by the piezoelectric element 33d, the resonance plate 32 is also driven to move away from the intake plate 31, and the resonance at this time The sheet 32 moves the gas in the compression chamber space 37 toward the gap 33e, and raises the volume in the confluence chamber 31c, so that the gas can continue to converge in the confluence chamber 31c through the intake hole 31a and the confluence groove 31b. By continuously repeating the operation steps of the gas transmission actuator 3 shown in FIGS. 4B to 4D, the gas transmission actuator 3 can continuously make the gas flow at a high speed, and the gas transmission actuator 3 can transmit and output gas. operating.

Next, referring back to FIGS. 3A, 3B, and 4A, the first insulating sheet 34, the conductive sheet 35, and the second insulating sheet 36 are sequentially stacked on the piezoelectric actuator 33. A conductive pin 351 protrudes from the outer edge of the conductive sheet 35, and a curved electrode 352 protrudes from the inner edge. The electrode 352 is electrically connected to the piezoelectric element 33d of the piezoelectric actuator 33. The conductive pin 351 of the conductive sheet 35 connects an external current to the outside, thereby driving the piezoelectric element 33d of the piezoelectric actuator 33. In addition, the arrangement of the first insulating sheet 34 and the second insulating sheet 36 can prevent the occurrence of a short circuit.

During the detection process of the gas detection device 100 or at a preset time point, the gas transmission actuator 3 is driven to operate, so that outside air is introduced through the air inlet 12, and the gas is ejected out of the gas at high speed through the gas transmission actuator 3 In the flow channel 21, the surface of the particle sensor 5 is cleaned by this operation, and the suspended particles adhering to the surface of the particle sensor 5 are sprayed to maintain the accuracy of each detection of the particle sensor 5. The above-mentioned preset time point may be before each inspection operation, or a plurality of preset time points with a fixed time interval (for example: automatic cleaning every three minutes), or may be set manually by the user, or In order to use the software to make calculations based on real-time monitoring values, the example here is not limited.

Please refer to FIG. 5, which is a schematic cross-sectional view of a gas transmission actuator of another preferred embodiment of the gas detection device 100 in this case. The gas transmission actuator in this embodiment is another type of piezoelectric drum For the air pump, the gas transmission actuator in the figure is indicated by the reference numeral 8, and the gas transmission actuator 8 will be used for explanation below. The gas transmission actuator 8 is provided in the accommodating groove 24 of the light mechanism 2. Please continue to refer to FIG. 6 and FIG. 7A. The gas transmission actuator 8 includes sequentially stacked jet holes 81, cavity frames 82, actuators 83, insulating frames 84, and conductive frames 85; jet holes 81 It includes a plurality of connecting pieces 81a, a suspension piece 81b and a central hole 81c. The suspension piece 81b can bend and vibrate. The plurality of connection pieces 81a are adjacent to the periphery of the suspension piece 81b. In this embodiment, the number of the connection pieces 81a is 4 , Adjacent to the four corners of the suspension piece 81b, but not limited to this, and the central hole 81c is formed at the center of the suspension piece 81b; the cavity frame 82 is stacked on the suspension piece 81b, and the actuator 83 is carried Stacked on the cavity frame 82, and includes a piezoelectric carrier plate 83a, a tuning resonance plate 83b, and a piezoelectric sheet 83c, wherein the piezoelectric carrier plate 83a carries the stack on the cavity frame 82 to adjust resonance The plate 83b is loaded and stacked on the piezoelectric carrier plate 83a, and the piezoelectric piece 83c is loaded and stacked on the tuning resonance plate 83b, which is deformed after the voltage is applied to drive the piezoelectric carrier plate 83a and the tuning resonance plate 83b for reciprocating bending vibration; The insulating frame 84 carries the piezoelectric carrier plate 83a stacked on the actuator 83, the conductive frame 85 carries the stack on the insulating frame 84, and the actuator 83, the cavity frame 82 and the suspension piece 81b A vibration chamber 86 is formed, and in addition, the thickness of the resonance plate 83b is adjusted to be greater than the thickness of the piezoelectric carrier plate 83a.

As described above, the gas transmission actuator 8 is respectively connected to the side wall portion 24b of the accommodating groove 24 through four connecting members 81a, and is spaced apart from the bottom surface 24a of the accommodating groove 24, so that the suspension piece 81b and the accommodating groove 24 A gas flow chamber 87 is formed between the bottom surfaces 24a of the two, wherein a plurality of voids 81d are formed between the floating piece 81b, the plurality of connecting members 81a, and the side wall portions 24b of the accommodating groove 24. In addition, the piezoelectric carrier 83a further has a first conductive pin 83d. The first conductive pin 83d extends outward from the periphery of the piezoelectric carrier 83a, and the conductive frame 85 also has a second conductive pin 85a and One electrode The second conductive pin 85a extends outward from the outer peripheral edge of the conductive frame 85, and the electrode portion 85b extends inwardly from the inner peripheral edge of the conductive frame 85, so that the structure of the gas transmission actuator 8 is sequentially stacked. The electrode portion 85b can be electrically connected to the piezoelectric sheet 83c, so that the first conductive pin 83d and the second conductive pin 85a can smoothly form a loop after receiving the driving signal.

Please refer to FIG. 7A to FIG. 7C, please refer to FIG. 7A first, the gas transmission actuator 8 is constructed in the accommodating groove 24 of the light mechanism 2, and the air jet orifice 81 is spaced from the bottom surface 24a of the accommodating groove 24, An air flow chamber 87 is formed between the two; please refer to FIG. 7B again. When a driving voltage is applied to the piezoelectric piece 83c of the actuator 83, the piezoelectric piece 83c begins to deform due to the piezoelectric effect and is driven by the same part. Adjust the resonance plate 83b and the piezoelectric carrier plate 83a. At this time, the air jet orifice 81 will be driven together by the principle of Helmholtz resonance, causing the actuator 83 to move upward. Since the actuator 83 is displaced upward, As a result, the volume of the airflow chamber 87 between the jet orifice 81 and the bottom surface 24a of the accommodating groove 24 increases, and the internal air pressure forms a negative pressure. The gas outside the gas transmission actuator 8 will be controlled by the jet orifice 81 due to the pressure gradient The gap 81d between the connecting piece 81a and the side wall portion 24b of the accommodating groove 24 enters the airflow chamber 87 and collects pressure; finally, referring to FIG. 7C, the gas continuously enters the airflow chamber 87 to make the airflow chamber 87 The air pressure inside forms a positive pressure. At this time, the actuator 83 is driven by the voltage to move downward, compressing the volume of the airflow chamber 87, and pushing the gas in the airflow chamber 87, so that the gas enters the gas flow channel 21, Provide gas to the particle sensor 5 to detect the size and concentration of suspended particles in the gas, and continuously draw the gas in the chamber 11 through the gas transmission actuator 8 so that the gas outside the casing 1 can continuously enter the chamber 11 It flows into the connection channel 14 for the external sensing module 6 to detect the specific gas content in the gas in the connection channel 14.

Please refer to FIG. 1 and FIG. 8, the gas detection device 100 further includes a driving component 7. The driving component 7 includes a battery module 71 for storing electrical energy and outputting electrical energy, and providing a driving gas transmission actuator 3. Laser module 4, particle sensor 5 and external sensing module 6 electrical energy. The battery module 71 can be externally connected to a power supply device 200 to receive and store the energy of the power supply device 200, and the power supply device 200 can transmit energy in a wired conduction mode, and can also transmit energy to the battery module 71 through a wireless conduction mode. Limited.

Please continue to refer to FIG. 1 and FIG. 8. The driving assembly 7 further includes a communication module 72 and a processor 73. The processor 73 is electrically connected to the battery module 71, the communication module 72, the gas transmission actuator 3, the laser module 4 and the particle sensor 5, and is used to drive the gas transmission actuator 3, the laser module 4 and the particle sensor 5. The external sensing module 6 is connected to the connection channel 14 and is electrically and data-connected with the processor 73, so the detection results of the particle sensor 5 and the sensor of the external sensing module 6 can pass through the processor 73 Perform analysis calculation and storage, and can be converted into a monitoring value. When the processor 73 activates the gas transmission actuator 3, the gas transmission actuator 3 starts to draw gas, so that the gas enters the gas flow channel 21, and the gas in the gas flow channel 21 is projected by the laser module 4 on the beam The beam of the channel 22 is irradiated. As a result, the particle sensor 5 receives the light spot scattered by the suspended particles in the gas flow channel 21 and transmits the detection result to the processor 73. The processor 73 calculates the air in accordance with the detection result The size and concentration of suspended particles are analyzed to generate a monitoring value for storage. The monitoring value stored by the processor 73 can be sent by the communication module 72 to an external connection device 300. The external connection device 300 may be one of a cloud system, a portable device, a computer system, a display device, etc., which is used to display the monitoring value and send an alarm.

In addition, when the processor 73 activates the gas transmission actuator 3, the gas transmission actuator 3 will deliver the gas in the chamber 11 to the gas flow channel 21, so that the chamber 11 assumes a negative pressure state, and the air intake begins The port 12 sucks the gas outside the housing 1, at this time, the gas entering the chamber 11 will diffuse to the connecting channel 14, the sensor in the external sensing module 6 in the connecting channel 14 begins to face the connecting channel 14 The gas is detected and the detection result is sent to the processor 73. Based on the detection result, the processor 73 calculates the concentration of the specific gas contained in the gas and analyzes the production The monitoring values are stored, and the monitoring values stored by the processor 73 can be sent to the external connection device 300 by the communication module 72.

In addition, the above-mentioned communication module 72 can be transmitted to the external connection device 300 through wired transmission or wireless transmission. The wired transmission method is, for example, one of USB, mini-USB, micro-USB, etc. The wireless transmission method is, for example, Wi-Fi One of the module, Bluetooth module, radio frequency identification module, a near field communication module, etc.

In summary, the gas detection device provided in this case has a gas transmission actuator to introduce the gas in the chamber into the gas flow channel. The particle sensor receives the light beam projected by the laser module and hits the suspended particles The generated projection light spot is used to calculate the size and concentration of suspended particles in the air. In addition, because the gas transmission actuator continuously transports the gas from the chamber to the gas flow channel, the chamber has always exhibited a negative pressure state, prompting the shell The gas outside the body continuously enters the chamber through the air inlet, and then diffuses to the connecting channel communicating with the chamber, so that the sensor in the external sensing module in the connecting channel can detect the content of the specific gas in the air. The above-mentioned external sensing module is detachably assembled in the connection channel, therefore, the user can easily replace the required gas sensor according to his needs, and when the sensor is damaged Easy replacement, no need to return to the original factory for maintenance or re-purchase a new gas detection device.

This case must be modified by anyone familiar with this technology, such as Shi Jiangsi, but none of them are as protected as the scope of the patent application.

100‧‧‧gas detection device

1‧‧‧Housing

12‧‧‧Air inlet

14‧‧‧ connection channel

6‧‧‧External sensing module

Claims (26)

A gas detection device includes: a housing having a chamber, at least one air inlet, an air outlet, and at least one connection channel, the chamber communicating with the air inlet, the air outlet, and the connection channel; A light mechanism, provided in the chamber, has a gas flow channel and a beam channel, the gas flow channel communicates with the gas inlet and the gas outlet, the beam channel communicates with the gas flow channel; a gas transmission actuator, Based on the light mechanism, it is used to guide air into the chamber from the air inlet after being actuated, and then into the gas flow channel through the connection channel; a laser module is provided in the light mechanism for To emit a light beam to the beam channel and irradiate the gas flow channel; a particle sensor is disposed at one end of the gas flow channel away from the gas transmission actuator to detect that the light beam irradiates a gas in the gas flow channel, The projected light spot generated by the suspended particles in the gas, thereby detecting and calculating the size and concentration of the suspended particles contained in the gas; and at least one external sensing module, connected to the connection channel, including A sensor is used to sense the gas in the connecting channel. The gas detection device as described in item 1 of the patent application range, wherein the light mechanism has a light source setting groove and a containing groove, the light source setting groove communicates with the light beam channel, and the containing groove is provided away from the gas flow path The other end of the particle sensor. The gas detection device as described in item 2 of the patent application scope, wherein the gas transmission actuator is constructed in the accommodating groove of the light mechanism to guide the gas to the gas flow path. The gas detection device as described in item 2 of the patent application scope, wherein the laser module is arranged in the light source installation groove of the light mechanism for emitting and projecting a light beam in the light beam channel. The gas detection device as described in item 1 of the patent application scope, wherein the suspended particles detected by the particle sensor are PM2.5 suspended particles. The gas detection device as described in item 1 of the patent application scope, wherein the suspended particles detected by the particle sensor are PM10 suspended particles. A gas detection device as described in item 1 of the patent application scope, wherein the gas transmission actuator is actuated to eject the gas into the gas flow path at a high speed to clean the surface of the particle sensor and remove the adhesion The suspended particles on the surface of the particle sensor can maintain the accuracy of the particle sensor in each monitoring. The gas detection device as described in item 1 of the patent application scope further includes a processor and a communication module, wherein the processor is used to drive the gas transmission actuator, the laser module, the particle sensor and the external The sensing module analyzes the results of the particle sensor and the sensor of the external sensing module and converts it into a monitoring value, and the communication module sends the monitoring value to an external linking device , By which the external connection device displays the monitoring value and a warning alarm. The gas detection device as described in item 8 of the patent application range, wherein the communication module is at least one of a wired communication transmission and a wireless communication transmission. The gas detection device as described in item 9 of the patent application scope, wherein the wired communication transmission is at least one of a USB, a mini-USB, and a micro-USB. The gas detection device as described in item 9 of the patent application scope, wherein the wireless communication transmission is at least one of a Wi-Fi module, a Bluetooth module, a radio frequency identification module and a near field communication module one. The gas detection device as described in item 8 of the patent application scope, wherein the external connection device is at least one of a cloud system, a portable device, a computer system, and the like. The gas detection device described in item 8 of the patent application scope further includes a battery module for storing electrical energy and outputting electrical energy, so that the processor can drive the gas transmission actuator, the laser module, and the particles The sensor and the sensor of the external sensing module, and the battery module can also be externally connected to a power supply device to receive electrical energy for storage. A gas detection device as described in item 13 of the patent application range, wherein the power supply device transmits electrical energy to the battery module for storage in a wired conduction manner. A gas detection device as described in item 13 of the patent application range, wherein the power supply device transmits electrical energy to the battery module for storage in a wireless conduction manner. The gas detection device as described in item 1 of the patent application, wherein the gas transmission actuator includes: an air inlet plate having at least one air inlet hole, at least one pair of busbar grooves corresponding to the location of the air inlet hole, and a busbar cavity Chamber, the air inlet hole is used to introduce gas, and the bus bar is used to guide the gas introduced from the air inlet hole to the confluence chamber; a resonant plate has a central hole, the central hole corresponds to the position of the confluence chamber , And a movable part around; and a piezoelectric actuator, corresponding to the position of the resonant plate; wherein, the air intake plate, the resonant plate and the piezoelectric actuator are sequentially stacked, And a cavity space is formed between the resonant plate and the piezoelectric actuator, so that when the piezoelectric actuator is driven, the gas is introduced from the air inlet hole of the air inlet plate and passes through the confluence The grooves are collected into the confluence chamber, and then pass through the central hole of the resonance plate, so that the piezoelectric actuator resonates with the movable portion of the resonance plate to transmit the gas. A gas detection device as described in item 16 of the patent application range, wherein the piezoelectric actuator includes: a floating plate having a square shape and capable of bending vibration; and an outer frame surrounding the outer side of the floating plate At least one bracket connected between the suspension plate and the outer frame to provide elastic support; and a piezoelectric element having a side length that is less than or equal to one side length of the suspension plate, and the piezoelectric The component is attached to a surface of the suspension board for receiving voltage to The suspension plate is driven to bend and vibrate. The gas detection device according to item 16 of the patent application scope, wherein the gas transmission actuator includes: a first insulating sheet, a conductive sheet, and a second insulating sheet; wherein, the air intake plate and the resonant sheet The piezoelectric actuator, the first insulating sheet, the conductive sheet, and the second insulating sheet are stacked in sequence. The gas detection device as described in item 1 of the patent application scope, wherein the sensor of the external sensing module is at least one of an oxygen sensor, a carbon monoxide sensor and a carbon dioxide sensor or any combination thereof Group. The gas detection device as described in item 1 of the patent application scope, wherein the sensor of the external sensing module is a volatile organic compound sensor. The gas detection device as described in item 1 of the patent application scope, wherein the sensor of the external sensing module is used to monitor at least one of bacteria, viruses and microorganisms or a group formed by any combination thereof. The gas detection device as described in item 1 of the patent application scope, wherein the sensor of the external sensor module is a group formed by any combination of at least one of a temperature sensor and a humidity sensor group. The gas detection device as described in item 8 of the patent application scope, wherein the sensor of the external sensing module is connected in the connection channel and is electrically and data-connected with the processor. The gas detection device as described in item 1 of the patent application scope, wherein the gas transmission actuator includes: a gas injection orifice, including a plurality of connecting pieces, a suspension piece, and a central hole, the suspension piece can be bent and vibrated, the plurality of A connecting piece is connected to the accommodating groove to position the air jet orifice to be accommodated in the accommodating groove, a gas is formed between the air jet orifice and a bottom surface of the accommodating groove A flow chamber, and at least one gap is formed between the plurality of connecting pieces, the suspension piece and the accommodating groove; a cavity frame with a bearing stacked on the suspension piece; an actuator with a bearing stacked on the cavity On the frame, receiving voltage generates reciprocating flexural vibration; an insulating frame, bearing stack is placed on the actuator; and a conductive frame, bearing stack is placed on the insulating frame; wherein, the actuator, the cavity A vibration chamber is formed between the body frame and the suspension plate, and the actuator is driven to drive the jet orifice plate to generate resonance, so that the suspension plate of the jet orifice plate is reciprocally vibrated and displaced to cause the gas to pass through The at least one gap enters the airflow chamber, and then is discharged through the air outlet to realize the transmission flow of the air. The gas detection device as described in item 24 of the patent application range, wherein the actuator includes: a piezoelectric carrier plate, the carrier is stacked on the cavity frame; an adjustment resonance plate, the carrier is stacked on the piezoelectric carrier On the board; and a piezoelectric sheet, bearing and stacked on the tuning resonance plate, receiving voltage to drive the piezoelectric carrier board and tuning resonance plate to generate reciprocating bending vibration. The gas detection device as described in item 25 of the patent application range, wherein the thickness of the tuning resonance plate is greater than the thickness of the piezoelectric carrier plate.

Images