CN216622161U - Formaldehyde detector based on NDIR principle - Google Patents
Formaldehyde detector based on NDIR principle Download PDFInfo
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- CN216622161U CN216622161U CN202220974934.5U CN202220974934U CN216622161U CN 216622161 U CN216622161 U CN 216622161U CN 202220974934 U CN202220974934 U CN 202220974934U CN 216622161 U CN216622161 U CN 216622161U
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Abstract
The utility model discloses a formaldehyde detector based on an NDIR (non-dispersive infra-red) principle, which relates to the technical field of formaldehyde detection, and the technical scheme is as follows: the device comprises a shell and a detection mechanism arranged in the shell, wherein the top of the shell is provided with an air inlet and an air outlet; a plurality of suckers are fixedly arranged on the outer wall of the bottom of the shell; the detection mechanism comprises an air inlet pipe, an air outlet pipe, an absorption air chamber, an infrared light source and an infrared detector, wherein one end of the air inlet pipe is communicated with one end of the absorption air chamber sequentially through a filter and an air suction pump; one end of the air outlet pipe is communicated with the other end of the absorption air chamber; the infrared light source and the infrared detector are respectively positioned at two ends of the absorption air chamber; a narrow-band filtering lens for detecting formaldehyde is arranged between the absorption air chamber and the infrared detector. Utilize the different principle of the wavelength of different organic substance absorption infrared rays to detect the concentration of formaldehyde in the air, improved the detection precision and the life of formaldehyde detector, can increase formaldehyde detector's stability in placement simultaneously, reduce to empty the risk of falling bad.
Description
Technical Field
The utility model relates to the technical field of formaldehyde detection, in particular to a formaldehyde detector based on an NDIR principle.
Background
NDIR (Non-dispersive infra-red sensor) infrared gas sensors use a broad-spectrum light source IR Lamp as the light source of the infrared sensor, and light passes through the gas to be detected in the light path cavity, passes through the narrow-band filter and reaches the infrared detector. The working principle of the gas sensing device is that the absorption characteristics are selected based on the near infrared spectra of different gas molecules, the gas components are identified by utilizing the relation (Lambert-Beer law) between the gas concentration and the absorption intensity, and the concentration of the gas components is determined, and the gas sensing device is mainly used for detecting compounds. The infrared gas sensor utilizing the NDIR principle has the advantages of high precision and sensitivity, good stability and reliability, long service life, strong anti-interference capability and the like.
At present, a formaldehyde detector is commonly used for quickly detecting formaldehyde in indoor air.
The existing indoor formaldehyde detector is mostly placed on a desktop to detect formaldehyde regularly in the using process, and has the defect of unstable placement, and the accuracy of the measurement result of the existing formaldehyde detector is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a formaldehyde detector based on an NDIR principle, which utilizes the principle that different organic substances absorb different wavelengths of infrared rays to detect the concentration of formaldehyde in air, improves the detection precision and the service life of the formaldehyde detector, and can increase the placement stability of the formaldehyde detector and reduce the risk of toppling and breaking.
The technical purpose of the utility model is realized by the following technical scheme: a formaldehyde detector based on an NDIR principle comprises a shell and a detection mechanism arranged in the shell, wherein the top of the shell is provided with an air inlet and an air outlet; a plurality of suckers are fixedly arranged on the outer wall of the bottom of the shell; the detection mechanism comprises an air inlet pipe, an air outlet pipe, an absorption air chamber, an infrared light source and an infrared detector, wherein one end of the air inlet pipe is connected with the air inlet, and the other end of the air inlet pipe is communicated with one end of the absorption air chamber through a filter and an air suction pump in sequence; one end of the air outlet pipe is connected with the air outlet, and the other end of the air outlet pipe is communicated with the other end of the absorption air chamber; the infrared light source and the infrared detector are respectively positioned at two ends of the absorption air chamber; and a narrow-band filtering lens for detecting formaldehyde is arranged between the absorption air chamber and the infrared detector.
The utility model is further configured to: and electromagnetic valves are arranged at the air outlet and the air inlet.
The utility model is further configured to: and the top end and the bottom end of the side wall of the shell are both provided with anti-collision rubber strips.
The utility model is further configured to: and a touch operation display screen is arranged on the outer surface of the shell.
The utility model is further configured to: and handle holding parts are formed on two sides of the shell and are relatively concave.
The utility model is further configured to: the outer surface of the handle holding part is provided with anti-skid projections.
The utility model is further configured to: the absorption air chamber, the infrared light source, the infrared detector and the narrow-band filter lens are positioned on the same straight line, and the irradiation direction of the infrared light source and the detection direction of the infrared detector face the absorption air chamber.
In conclusion, the utility model has the following beneficial effects: the utility model utilizes the principle that different organic substances absorb different infrared wavelengths to detect the concentration of formaldehyde in the air, improves the detection precision and the service life of the formaldehyde detector, and can increase the placement stability of the formaldehyde detector and reduce the risk of toppling and breaking.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
fig. 2 is a cross-sectional view of an embodiment of the present invention.
In the figure: 1. a housing; 2. an air inlet; 3. an air outlet; 4. a suction cup; 5. an air inlet pipe; 6. an air outlet pipe; 7. an absorption air chamber; 8. an infrared light source; 9. an infrared detector; 10. a filter; 11. an air pump; 12. a narrow band filtering lens; 13. an electromagnetic valve; 14. an anti-collision rubber strip; 15. touch operation of the display screen; 16. a handle grip portion; 17. and (4) anti-skid bulges.
Detailed Description
The present invention is described in further detail below with reference to FIGS. 1-2.
Example (b): a formaldehyde detector based on an NDIR principle is shown in figures 1 and 2 and comprises a shell 1 and a detection mechanism arranged in the shell 1, wherein the top of the shell 1 is provided with an air inlet 2 and an air outlet 3; a plurality of suckers 4 are fixedly arranged on the outer wall of the bottom of the shell 1; the detection mechanism comprises an air inlet pipe 5, an air outlet pipe 6, an absorption air chamber 7, an infrared light source 8 and an infrared detector 9, one end of the air inlet pipe 5 is connected with the air inlet 2, and the other end of the air inlet pipe 5 is communicated with one end of the absorption air chamber 7 sequentially through a filter 10 and an air suction pump 11; one end of the air outlet pipe 6 is connected with the air outlet 3, and the other end of the air outlet pipe 6 is communicated with the other end of the absorption air chamber 7; the infrared light source 8 and the infrared detector 9 are respectively positioned at two ends of the absorption air chamber 7; a narrow-band filter lens 12 for detecting formaldehyde is arranged between the absorption gas chamber 7 and the infrared detector 9.
In the present embodiment, the air inlet 2 facilitates the air to enter the housing 1; the air which is detected in the shell 1 is conveniently discharged through the air outlet 3; the placing stability of the shell 1 is convenient to increase through the sucking disc 4; the air inlet 2 is conveniently communicated with the air absorption chamber 7 through the air inlet pipe 5, so that air entering the shell 1 can enter the air absorption chamber 7; the air outlet 3 is conveniently communicated with the air absorption chamber 7 through the air outlet pipe 6, so that the air in the air absorption chamber 7 can be discharged; air is conveniently sucked into the shell 1 through the air suction pump 11; the filter 10 is convenient for filtering the sucked air, and dust and impurities are prevented from entering the absorption air chamber 7 to influence the detection result; infrared light is emitted to the absorption air chamber 7 through the infrared light source 8, the infrared light source 8 irradiates the air in the absorption air chamber 7, part of the infrared light is absorbed by formaldehyde, the infrared light source 8 filtered by the narrow-band filter lens 12 reaches the infrared detector 9, and the infrared detector 9 detects the intensity of the filtered light source, so that the concentration of the formaldehyde in the air is obtained.
The air outlet 3 and the air inlet 2 are both provided with electromagnetic valves 13.
In this embodiment, the electromagnetic valve 13 is convenient for controlling the on-off of the air inlet 2 and the air outlet 3, and meanwhile, dust and impurities can be prevented from entering the casing 1 from the air inlet 2 and the air outlet 3 when the formaldehyde detector is not used.
The top and the bottom of the side wall of the shell 1 are both provided with anti-collision rubber strips 14.
In this embodiment, through crashproof adhesive tape 14, be convenient for protect the buffering when this formaldehyde detector falls.
The outer surface of the housing 1 is provided with a touch operation display screen 15.
In the present embodiment, the display screen 15 is operated by touch, so that the detection result is displayed conveniently.
The two sides of the shell 1 are formed with handle holding parts 16, and the handle holding parts 16 are relatively concave.
In the embodiment, the formaldehyde detector is convenient to hold and carry by the handle holding part 16.
The outer surface of the handle grip 16 is provided with a non-slip protrusion 17.
In this embodiment, the anti-slip property is increased by the anti-slip projection 17 when holding the hand.
The absorption air chamber 7, the infrared light source 8, the infrared detector 9 and the narrow-band filter lens 12 are positioned on the same straight line, and the irradiation direction of the infrared light source 8 and the detection direction of the infrared detector 9 face the absorption air chamber 7.
The working principle is as follows: when the formaldehyde detector based on the NDIR principle is used, firstly, the electromagnetic valve 13 is opened, then the air pump 11 is started, air is sucked into the air inlet pipe 5 through the air inlet 2, the air enters the absorption air chamber 7 after being filtered by the filter 10, the infrared light source 8 emits infrared light to the absorption air chamber 7, the infrared light source 8 irradiates the air in the absorption air chamber 7, part of the infrared light is absorbed by the formaldehyde, the infrared light source 8 filtered by the narrow-band filter lens 12 reaches the infrared detector 9, the infrared detector 9 detects the intensity of the filtered light source, so that the concentration of the formaldehyde in the air is obtained and displayed in the touch operation display screen 15, the detected air is discharged out of the absorption air chamber 7 through the air outlet pipe 6 and then is discharged out of the shell 1 through the air outlet 3; the formaldehyde detector can be placed on a platform or the ground for detection, the placing stability of the shell 1 is improved through the sucking disc 4, and the handle holding part 16 can also be held by hand for detection; through the formaldehyde detector based on NDIR principle that comprises casing 1 and the detection mechanism of installing in casing 1, utilize the different principle of wavelength of different organic substance absorption infrared rays to detect the concentration of formaldehyde in the air, improved the detection precision and the life of formaldehyde detector, can increase the stability of placing of formaldehyde detector simultaneously, reduce to empty the risk of falling bad.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. A formaldehyde detector based on NDIR principle, its characteristic is: the device comprises a shell (1) and a detection mechanism arranged in the shell (1), wherein the top of the shell (1) is provided with an air inlet (2) and an air outlet (3); a plurality of suckers (4) are fixedly arranged on the outer wall of the bottom of the shell (1); the detection mechanism comprises an air inlet pipe (5), an air outlet pipe (6), an absorption air chamber (7), an infrared light source (8) and an infrared detector (9), one end of the air inlet pipe (5) is connected with the air inlet (2), and the other end of the air inlet pipe (5) is communicated with one end of the absorption air chamber (7) sequentially through a filter (10) and an air suction pump (11); one end of the air outlet pipe (6) is connected with the air outlet (3), and the other end of the air outlet pipe (6) is communicated with the other end of the absorption air chamber (7); the infrared light source (8) and the infrared detector (9) are respectively positioned at two ends of the absorption air chamber (7); a narrow-band filter lens (12) for detecting formaldehyde is arranged between the absorption air chamber (7) and the infrared detector (9).
2. The formaldehyde detector according to claim 1, wherein the detector comprises: and electromagnetic valves (13) are arranged at the air outlet (3) and the air inlet (2).
3. The formaldehyde detector according to claim 1, wherein the detector comprises: the top and the bottom of the side wall of the shell (1) are both provided with anti-collision rubber strips (14).
4. The formaldehyde detector according to claim 1, wherein the detector comprises: and a touch operation display screen (15) is arranged on the outer surface of the shell (1).
5. The formaldehyde detector according to claim 1, wherein the detector comprises: the handle holding part (16) is formed on two sides of the shell (1), and the handle holding part (16) is relatively concave.
6. The formaldehyde detector according to claim 5, wherein the detector further comprises: the outer surface of the handle holding part (16) is provided with an antiskid bulge (17).
7. The formaldehyde detector according to claim 1, wherein the detector comprises: the absorption air chamber (7), the infrared light source (8), the infrared detector (9) and the narrow-band filter lens (12) are located on the same straight line, and the irradiation direction of the infrared light source (8) and the detection direction of the infrared detector (9) face the absorption air chamber (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220974934.5U CN216622161U (en) | 2022-04-26 | 2022-04-26 | Formaldehyde detector based on NDIR principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220974934.5U CN216622161U (en) | 2022-04-26 | 2022-04-26 | Formaldehyde detector based on NDIR principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216622161U true CN216622161U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220974934.5U Active CN216622161U (en) | 2022-04-26 | 2022-04-26 | Formaldehyde detector based on NDIR principle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216622161U (en) |
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2022
- 2022-04-26 CN CN202220974934.5U patent/CN216622161U/en active Active
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