CN218726588U

CN218726588U - Miniature air quality monitor

Info

Publication number: CN218726588U
Application number: CN202222861844.8U
Authority: CN
Inventors: 肖必丰; 吕强; 吕小琴
Original assignee: Changzhou Guangsheng Quantum Technology Co ltd
Current assignee: Changzhou Guangsheng Quantum Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-24
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to the technical field of air detection, in particular to a miniature air quality monitor.A shell is internally provided with an air detection module which comprises a gas irradiation mechanism, a light filter conversion mechanism and an infrared photosensitive element, wherein the gas irradiation mechanism is arranged corresponding to the infrared photosensitive element, and the light filter conversion mechanism is arranged between the gas irradiation mechanism and the infrared photosensitive element; the light filter switching mechanism comprises a plurality of switching disks and light transmitting holes, wherein the switching disks are circular, the switching disks are sequentially distributed along the same straight line, the central axis of each switching disk is parallel to the straight line, two adjacent switching disks are staggered, each switching disk is in transmission connection with a driving mechanism, each driving mechanism is used for driving the switching disks to rotate, each switching disk is provided with a plurality of light transmitting holes around the central axis, and light filters are installed in any number of light transmitting holes. The utility model discloses carry out miniaturized transformation to the filter element shifter for air monitor can be miniaturized.

Description

Miniature air quality monitor

Technical Field

The utility model relates to an empty gas detection surveys technical field, especially relates to a miniature air quality monitor.

Background

The air quality monitor of the prior art uses a photosensitive sensor to detect air, the main structure of an air detection module in the air quality monitor is shown in figure 1, and the air detection module comprises a measurement groove, an air inlet pipe, an air outlet pipe, an infrared light source, a lens, a shading cylinder, a motor, a conversion disc, an optical filter and an infrared photosensitive element, because the vibration and rotation spectrums of most of gas molecules are in an infrared band, when the frequency of incident infrared radiation is the same as the vibration and rotation characteristic frequency of the molecules, the infrared radiation can be absorbed by the gas molecules to cause the attenuation of radiation intensity, the infrared light generated by the infrared light source in the air detection module is incident into the measurement groove and irradiates on a certain measured gas, the infrared light with different wavelengths has different absorption characteristics according to the different types of the gas, the absorption amount of the infrared light of the same gas with different concentrations is also different, therefore, the type and the concentration of the measured gas can be known according to the wavelength of the infrared light source and the electric signal output by the infrared photosensitive element by measuring the intensity of the infrared photosensitive element. This kind of empty gas detection surveys module is when using, need cooperate different light filters to detect, it installs a plurality of light filters on the change over disk, rotate through the motor drive change over disk, place different light filters in infrared light sensitive element top, such light filter conversion structure is when using, because need arrange a lot of light filters that become annular distribution on the change over disk, lead to the change over disk diameter great from this, make whole empty gas detection surveys module's volume great, be unfavorable for the miniaturization of air quality monitoring.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of the prior art that the optical filter conversion structure is too big, and providing a miniature air quality monitor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the miniature air quality monitor comprises a shell, wherein an air detection module is arranged in the shell, the air detection module comprises a gas irradiation mechanism, a light filter conversion mechanism and an infrared photosensitive element, the gas irradiation mechanism and the infrared photosensitive element are correspondingly arranged, and the light filter conversion mechanism is arranged between the gas irradiation mechanism and the infrared photosensitive element;

the optical filter switching mechanism comprises a plurality of switching disks and light holes, wherein the switching disks are circular and are distributed in sequence along the same straight line, the central axis of each switching disk is parallel to the straight line, every two adjacent switching disks are arranged in a staggered mode, each switching disk is connected with a driving mechanism in a transmission mode, each driving mechanism is used for driving the switching disks to rotate, each switching disk is provided with a plurality of light holes around the central axis of the switching disk, and optical filters are installed in the light holes in any number.

As a preferred technical scheme, the air inlet pipe and the air outlet pipe of the air irradiation mechanism are both provided with check valves.

According to a preferable technical scheme, a gas filtering device is installed on a gas inlet pipe of the gas irradiation mechanism, and the gas filtering device is further connected with a dehumidifying device.

As a preferable technical scheme, the number of the conversion discs is not less than two, the sizes of the conversion discs are the same, the number, the size and the position of the light holes on each conversion disc are kept consistent, and no optical filter is arranged in at least one light hole.

As a preferred technical solution, the driving mechanism includes a plurality of motors, the motors are arranged in one-to-one correspondence with the switching disks, and the corresponding switching disks are connected to the motors.

According to the preferable technical scheme, the gaps of the shell are filled with the sealant.

The utility model provides a pair of miniature air quality monitor, beneficial effect lies in: through reforming transform current light filter conversion architecture, be provided with the structure of a plurality of light filters on a switching dish, improve to a plurality of switching dishes that distribute along same straight line, stagger the setting between the switching dish, all be provided with the structure of a plurality of light filters on every switching dish, can replace a major diameter switching dish at a plurality of minor diameter switching dishes like this for the volume of whole empty gas detection surveys module reduces, lets the miniaturization of whole air quality monitor.

Drawings

Fig. 1 is a schematic structural diagram of an air quality detection module in the prior art.

Fig. 2 is the utility model provides a miniature air quality monitor's schematic structure diagram.

Fig. 3 is the utility model provides a first schematic diagram of a section view of miniature air quality monitor.

Fig. 4 is the utility model provides a switching dish relative position schematic diagram of miniature air quality monitor.

In the figure: 1. a measuring tank; 2. an air inlet pipe; 3. an air outlet pipe; 4. an infrared light source; 5. a lens; 6. an infrared photosensor; 7. a switching disk; 8. a light-transmitting hole; 9. an optical filter; 10. a motor; 11. a shading tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-4, a miniature air quality monitor comprises a shell, and sealing glue is filled in gaps of the shell. The sealant can seal the gap, so that external dust and water stain are prevented from entering the inside of the monitor, and the normal use of the monitor is ensured. An air detection module is arranged in the shell and comprises a gas irradiation mechanism, a light filter 9 conversion mechanism and an infrared photosensitive element 6, wherein the gas irradiation mechanism is arranged corresponding to the infrared photosensitive element 6, and the light filter 9 conversion mechanism is arranged between the gas irradiation mechanism and the infrared photosensitive element 6; the gas irradiation mechanism comprises a measuring groove 1, an air inlet pipe 2, an air outlet pipe 3, an infrared light source 4, a lens 5 and a shading cylinder 11, an air cavity is formed in the measuring groove 1, the air inlet pipe 2 and the air outlet pipe 3 communicated with the air cavity in the measuring groove 1 are arranged on the measuring groove 1, the infrared light source 4 is arranged at the top end of the measuring groove 1, the lens 5 is arranged at the bottom of the measuring groove 1, and the infrared photosensitive element 6 corresponds to the lens 5. Check valves are respectively arranged on the air inlet pipe 2 and the air outlet pipe 3 of the gas irradiation mechanism.

The optical filter 9 switching mechanism comprises a plurality of switching discs 7 and light holes 8, the switching discs 7 are circular, the switching discs 7 are sequentially distributed along the same straight line, the central axis of each switching disc 7 is parallel to the straight line, two adjacent switching discs 7 are arranged in a staggered mode, each switching disc 7 is connected with a driving mechanism in a transmission mode, each driving mechanism is used for driving the corresponding switching disc 7 to rotate, each switching disc 7 is provided with a plurality of light holes 8 around the central axis of each switching disc 7, and the optical filters 9 are installed in any number of light holes 8. The number of the conversion discs 7 is not less than two, the sizes of the conversion discs 7 are the same, the number, the size and the positions of the light holes 8 on each conversion disc 7 are consistent, and the optical filter 9 is not arranged in at least one light hole 8. The driving mechanism comprises a plurality of motors 10, the motors 10 are arranged in one-to-one correspondence with the switching discs 7, and the corresponding switching discs 7 are connected with the motors 10.

The utility model discloses when using, through setting up a plurality of superposes conversion dish 7 together, can be when using a filter lens on the arbitrary conversion dish 7, rotate the filter lens on this conversion dish 7 to between infrared light sensitive element 6 and lens 5, remaining conversion dish 7 then rotates one of them light trap 8 that does not install light filter 9 to between infrared light sensitive element 6 and lens 5, just so can realize measuring the operation. Compared with a structure that a plurality of filter lenses are arranged on a large turntable, the structure occupies a small space, so that the air quality monitor can be miniaturized and reformed.

Example 2

Referring to fig. 1 to 4, as another preferred embodiment of the present invention, the difference from embodiment 1 is that a gas filtering device is installed on the gas inlet pipe 2 of the gas irradiation mechanism, and a dehumidifying device is further connected to the gas filtering device. The gas entering the measuring tank 1 is filtered in advance by the gas filtering device to reduce the influence of dust on the measuring result, and the excessive moisture in the gas is removed in advance by the dehumidifying device to reduce the humidity of the gas, so that the more accurate measuring result is obtained.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The miniature air quality monitor comprises a shell and is characterized in that an air detection module is installed in the shell, the air detection module comprises a gas irradiation mechanism, a light filter conversion mechanism and an infrared photosensitive element (6), the gas irradiation mechanism and the infrared photosensitive element (6) are arranged correspondingly, and the light filter conversion mechanism is arranged between the gas irradiation mechanism and the infrared photosensitive element (6);

the optical filter switching mechanism comprises a plurality of switching disks (7) and light holes (8), wherein the switching disks (7) are circular, a plurality of the switching disks (7) are sequentially distributed along the same straight line, the central axis of each switching disk (7) is parallel to the straight line, every two adjacent switching disks (7) are staggered, each switching disk (7) is in transmission connection with a driving mechanism, each driving mechanism is used for driving each switching disk (7) to rotate, each switching disk (7) is provided with a plurality of light holes (8) around the central axis of the switching disk, and optical filters (9) are installed in any number of light holes (8).

2. The micro air quality monitor according to claim 1, wherein check valves are mounted on the air inlet pipe (2) and the air outlet pipe (3) of the air irradiation mechanism.

3. The micro air quality monitor according to claim 1, wherein a gas filtering device is installed on the gas inlet pipe (2) of the gas irradiation mechanism, and the gas filtering device is further connected with a dehumidifying device.

4. The micro air quality monitor according to claim 1, wherein the number of the switching disks (7) is not less than two, the switching disks (7) are all the same in size, the number, the size and the position of the light holes (8) on each switching disk (7) are all kept consistent, and the optical filter (9) is not arranged in at least one light hole (8).

5. The micro air quality monitor according to claim 1, wherein the driving mechanism comprises a plurality of motors (10), the motors (10) are arranged in one-to-one correspondence with the switching discs (7), and the corresponding switching discs (7) are connected with the motors (10).

6. The micro air quality monitor according to claim 1, wherein the gaps of the housing are filled with a sealant.