Infrared detection module easy and convenient to maintain

Abstract

The utility model belongs to the technical field of gas detection devices, and provides an infrared detection module simple and convenient to maintain, which comprises a shell and a detection component mounted on the shell, the infrared light source and the detector are installed on the base, the reflecting base is arranged in the shell and opposite to the base, an air chamber is arranged at the end, close to the base, of the reflecting base, the inner wall of the air chamber is a reflecting face, and an air hole communicating the air chamber with the outside is further formed in the reflecting base; the base is detachably connected with the reflecting seat and the shell; a first mounting cavity for mounting an infrared light source and a second mounting cavity for mounting a detector are formed in one end, close to the reflecting seat, of the base at intervals; the LED lamp further comprises a protection assembly, the protection assembly comprises a first protection piece and a second protection piece which are high in light transmission, the first protection piece covers an opening of the first installation cavity, and the second protection piece covers an opening of the second installation cavity. The device has the characteristics of simple and compact structure, high sensitivity, convenience in maintenance and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection devices, and particularly relates to an infrared detection module which is easy to maintain. Background Technique

[0002] The technology of detecting gas concentration by using infrared rays has a long history. Its basic principle is that a light source emits infrared light. When the infrared light passes through the gas to be detected, these gas molecules absorb the infrared light of a specific wavelength. The intensity of the infrared light after absorption is detected by an optical detector, and the intensity of the absorbed infrared light conforms to the Lambert-Beer absorption law with the gas concentration. The concentration of the gas to be detected can be obtained through calculation.

[0003] At present, although the infrared combustible gas sensors on the market have advantages such as reliability, accuracy, and sensitivity compared with the previous electrochemical and catalytic combustion principle sensors, when they are exposed to a relatively complex external environment for a long time, the infrared electronic components will also be corroded or polluted, affecting the measurement accuracy and service life.

[0004] The technical problem to be solved by the utility model is: how to provide an infrared detection module which is simple and compact in structure, good in stability, easy to maintain and long in service life. Content of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an infrared detection module which is easy to maintain, and has the characteristics of simple and compact structure, high sensitivity, easy to maintain and long service life.

[0006] The technical solution adopted by the utility model is: an infrared detection module which is easy to maintain, including a housing and a detection component installed on the housing. The housing includes an outer shell and a base built in the outer shell. The detection component includes an infrared light source and a detector installed on the base, and a reflection seat built in the outer shell and arranged opposite to the base. The infrared light source and the detector are arranged at intervals at one end of the base close to the reflection seat. One end of the reflection seat close to the base is provided with an air chamber, the inner wall of the air chamber is a reflecting surface, and the reflection seat is also provided with a pore communicating the air chamber with the outside.

[0007] The base is detachably connected to the reflection seat and the outer shell. The base is provided with a first installation cavity for installing the infrared light source and a second installation cavity for installing the detector at intervals.

[0008] It further includes a protection component, and the protection component includes a first protection sheet and a second protection sheet with high light transmittance. The first protection sheet covers the opening of the first installation cavity, and the second protection sheet covers the opening of the second installation cavity.

[0009] The simple maintenance infrared detection module of the present application can avoid the pollution and corrosion of the infrared light source and the detector caused by external gases by setting the first protective sheet and the second protective sheet with high light transmittance, and improve the detection accuracy of the detection module; moreover, the base is detachably connected to the reflection seat and the outer shell, so that the base and the reflection seat can be removed from the outer shell to wipe off the pollutants adhered to the surfaces of the first protective sheet and the second protective sheet, or replace the first protective sheet and the second protective sheet, which can extend the service life of the detection module and maintain the detection accuracy; in addition, the first installation cavity and the second installation cavity are arranged at intervals, which can avoid some infrared light from directly entering the detector through reflection or refraction without passing through the gas chamber, affecting the detection accuracy.

[0010] In some embodiments, the inner wall of one end of the first installation cavity close to the reflection seat is a paraboloid, and the focus of the paraboloid coincides with the light generation point of the infrared light source.

[0011] By adopting the above technical solution, it can be ensured that the light emitted by the infrared light source is emitted as parallel light after being reflected by the paraboloid, improving the detection accuracy.

[0012] In some embodiments, the protection component further includes a filter element, and the filter element covers the air hole.

[0013] By adopting the above technical solution, the filter element can reduce the entry of external particulate pollutants into the gas chamber and avoid excessive particulate pollutants from interfering with the detection results.

[0014] In some embodiments, the base is connected to the outer shell by one of the ways of threaded connection, snap connection, and screw connection. One end of the reflection seat abuts against the base, and the other end abuts against the outer shell.

[0015] By adopting the above technical solution, only by fixing the base, the reflection seat can be fixed in the outer shell, and the end face of the reflection seat abuts against the end face of the base, which can reduce light loss and prevent air flow from entering and exiting between the reflection seat and the base, thereby improving the detection accuracy.

[0016] In some embodiments, a positioning boss is connected to the reflection seat, and a positioning groove corresponding to the positioning boss is provided on the base.

[0017] By adopting the above technical solution, the cooperation of the positioning boss and the positioning groove can ensure the cooperation accuracy of the reflection seat and the base, and ensure that the infrared light source and the detector are respectively at the light emission point and the light reception point.

[0018] In some embodiments, the positioning boss is movably connected to the reflection seat. A wiping piece is provided at the top of the positioning boss, and a connecting rod is provided at the bottom of the positioning boss. One end of the connecting rod away from the positioning boss protrudes from the reflection seat.

[0019] By adopting the above technical solution, one can pull the connecting rod to protrude one end of the reflection base and extract the positioning boss from the positioning groove, and then rotate the reflection base to drive the positioning boss to rotate. The wiper on the top of the positioning boss can wipe the surface contaminants of the first protection sheet and the second protection sheet cleanly, making the cleaning more convenient. After cleaning, rotate the reflection base back to its original position to insert the positioning boss into the positioning groove, so that the reflection base and the base resume alignment.

[0020] In some embodiments, an elastic member is also sleeved on the connecting rod. An installation groove for positioning the elastic member is provided on the reflection base. One end of the elastic member abuts against the positioning boss, and the other end abuts against the bottom of the installation groove.

[0021] By adopting the above technical solution, the elastic member can prevent the positioning boss from easily separating from the positioning groove, ensuring the positioning accuracy of the reflection base and the base. And during wiping, the elastic member can keep the wiper in contact with the first protection sheet and the second protection sheet to ensure the wiping effect.

[0022] In some embodiments, a handle is connected to the end of the connecting rod far from the positioning boss.

[0023] By adopting the above technical solution, the handle can facilitate the extraction of the positioning boss from the positioning groove.

[0024] In some embodiments, the number of positioning bosses is two, and the wipers on the two positioning blocks respectively correspond to the first protection sheet and the second protection sheet.

[0025] By adopting the above technical solution, when the first protection sheet and the second protection sheet are not on the same rotation trajectory, setting two positioning blocks can wipe the first protection sheet and the second protection sheet simultaneously during rotation.

[0026] In some embodiments, the detection component further includes a PCB main control board. The PCB main control board is installed on the base, and the PCB main control board is electrically connected to the infrared light source and the detector.

[0027] By adopting the above technical solution, the PCB main control board is used to control the coordinated operation of the infrared light source and the detector, and calculate the concentration of combustible gas of the measured gas according to the signal transmitted by the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic cross-sectional structure diagram of the infrared detection module with simple maintenance according to the first embodiment of the present invention;

[0029] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of the infrared detection module with simple maintenance shown in another direction;

[0030] Figure 3This is a schematic cross-sectional view of an infrared detection module with easy maintenance according to the second embodiment of the present utility model.

[0031] In the figure: 100, infrared detection module with easy maintenance; 10, housing; 11, outer shell; 12, base; 13, first installation cavity; 14, second installation cavity; 15, positioning groove; 20, detection component; 21, infrared light source; 22, detector; 23, reflection seat; 231, gas chamber; 232, air hole; 233, installation groove; 24, positioning boss; 25, wiping piece; 26, connecting rod; 27, elastic member; 28, handle; 29, PCB main control board; 30, protection component; 31, first protection piece; 32, second protection piece; 33, filtering piece. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When the number of an element is referred to as having "a plurality", it can be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] First embodiment:

[0036] Please refer to Figure 1 And Figure 2, an infrared detection module 100 with easy maintenance, which is a preferred embodiment of the present utility model, includes a housing 10, a detection component 20 and a protection component 30 installed on the housing 10. The housing 10 includes an outer shell 11 and a base 12 built in the outer shell 11. The detection component 20 includes an infrared light source 21 and a detector 22 installed on the base 12, and a reflection seat 23 built in the outer shell 11 and disposed opposite to the base 12. The infrared light source 21 and the detector 22 are spaced apart at one end of the base 12 close to the reflection seat 23. An air chamber 231 is provided at one end of the reflection seat 23 close to the base 12. The inner wall of the air chamber 231 is a reflective surface. An air hole 232 communicating the air chamber 231 with the outside is also provided on the reflection seat 23. The base 12 is detachably connected to the reflection seat 23 and the outer shell 11. First mounting cavities 13 for installing the infrared light source 21 and second mounting cavities 14 for installing the detector 22 are spaced apart on the base 12. The protection component 30 includes a first protection sheet 31 and a second protection sheet 32 with high light transmittance. The first protection sheet 31 covers the opening of the first mounting cavity 13, and the second protection sheet 32 covers the opening of the second mounting cavity 14. The infrared detection module 100 with easy maintenance of the present application has the characteristics of simple and compact structure, high sensitivity, easy maintenance and long service life.

[0037] As Figure 1 shown, the inner wall of one end of the first mounting cavity 13 close to the reflection seat 23 is a parabolic surface, and the focus of the parabolic surface coincides with the light generation point of the infrared light source 21.

[0038] Furthermore, in order to prevent tiny particulate impurities in the outside from entering the air chamber 231 and interfering with the detection result, the protection component 30 further includes a filter element 33, and the filter element 33 covers the air hole 232. Optionally, the filter element 33 can be detachably attached to the surface of the reflection seat 23 where the air hole 232 is opened by means such as adhesive bonding, snap connection, or press connection, so that the filter element 33 can be replaced according to the actual use situation to maintain a good air intake effect.

[0039] Optionally, the base 12 is connected to the outer shell 11 by one of the ways of screw connection, snap connection, or screw connection. One end of the reflection seat 23 abuts against the base 12, and the other end abuts against the outer shell 11. In this embodiment, the filter element 33 is disposed at one end of the reflection seat 23 away from the base 12, and the filter element 33 is press-fitted between the reflection seat 23 and the outer shell 11. With such a setting, in daily maintenance, only the outer shell 11 needs to be removed to replace the filter element 33, and the first protection sheet 31 and the second protection sheet 32 can be wiped or cleaned, making daily maintenance more convenient, thereby increasing the service life of the detection module.

[0040] Optionally, the filter element can be a conventional air filter cotton or other conventional air filtering supplies.

[0041] As Figure 2As shown, a positioning boss 24 is connected to the reflection base 23, and a positioning groove 15 corresponding to the positioning boss 24 is provided on the base 12. The number of the positioning bosses 24 can be increased or decreased according to actual requirements, and the positioning grooves 15 should correspond to the positioning bosses 24 one by one.

[0042] In this embodiment, the detection assembly 20 further includes a PCB main control board 29, which is installed on the base 12. The PCB main control board 29 is electrically connected to the infrared light source 21 and the detector 22. The PCB main control board 29 is used to control the coordinated operation of the infrared light source 21 and the detector 22, and calculate the combustible gas concentration of the measured gas according to the signal transmitted by the detector 22.

[0043] For the simply maintained infrared detection module 100 of the present application, by providing the first protection sheet 31 and the second protection sheet 32 with high light transmittance, it is possible to prevent the external gas from polluting and corroding the infrared light source 21 and the detector 22, and improve the detection accuracy of the detection module; and the base 12 is detachably connected to the reflection base 23 and the housing 11, so that the base 12 and the reflection base 23 can be removed from the housing 11 to wipe off the contaminants adhered to the surfaces of the first protection sheet 31 and the second protection sheet 32, or replace the first protection sheet 31 and the second protection sheet 32, which can extend the service life of the detection module and maintain the detection accuracy; in addition, by arranging the first installation cavity 13 and the second installation cavity 14 at intervals, it is possible to prevent some infrared light from directly entering the detector 22 through reflection or refraction without passing through the gas chamber 231, thus affecting the detection accuracy.

[0044] Second Embodiment:

[0045] As Figure 3 shown, a simply maintained infrared detection module 100 of the second embodiment of the present utility model is provided. The measuring device of this embodiment is similar in structure to the measuring device of the first embodiment. The difference is that in this embodiment, the positioning boss 24 is movably connected to the reflection base 23. A wiping member 25 for wiping the protection sheet is provided on the top of the positioning boss 24, and a connecting rod 26 is provided at the bottom of the positioning boss 24. One end of the connecting rod 26 away from the positioning boss 24 protrudes from the reflection base 23. During cleaning and maintenance, the end of the connecting rod 26 protruding from the reflection base 23 can be pulled to draw out the positioning boss 24 from the positioning groove 15, and then the reflection base 23 is rotated to drive the positioning boss 24 to rotate. The wiping member 25 on the top of the positioning boss 24 can wipe the contaminants on the surfaces of the first protection sheet 31 and the second protection sheet 32 clean, making the cleaning more convenient. After cleaning, the reflection base 23 is rotated back to its original position to insert the positioning boss 24 into the positioning groove 15, so that the reflection base 23 and the base 12 are restored to their alignment.

[0046] Optionally, the wiper 25 is one of non-woven fabric, cotton cloth, sponge, etc. The wiper 25 can be fixed to the top of the positioning boss 25 by means of bonding, clamping, etc.

[0047] Furthermore, an elastic member 27 is sleeved on the connecting rod 26, and an installation groove 233 for positioning the elastic member 27 is provided on the reflection seat 23. One end of the elastic member 27 abuts against the positioning boss 24, and the other end abuts against the bottom of the installation groove 233. When detecting gas, the elastic member 27 can prevent the positioning boss 24 from easily separating from the positioning groove 15, ensuring the positioning accuracy of the reflection seat 23 and the base 12; during wiping, the elastic member 27 can keep the wiper 25 in contact with the first protection sheet 31 and the second protection sheet 32, ensuring the wiping effect. In this embodiment, the elastic member 27 is a compression spring.

[0048] Furthermore, a handle 28 is connected to the end of the connecting rod 26 away from the positioning boss 24. The handle 28 can facilitate the extraction of the positioning boss 24 from the positioning groove 15.

[0049] When the first protection sheet 31 and the second protection sheet 32 are not on the same rotation track, the number of positioning bosses 24 is two, and the wipers 25 on the two positioning bosses respectively correspond to the first protection sheet 31 and the second protection sheet 32. By providing two positioning bosses, the first protection sheet 31 and the second protection sheet 32 can be wiped simultaneously during rotation, making the wiping more efficient.

[0050] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An infrared detection module that is easy to maintain, comprising a housing (10) and a detection component (20) mounted on the housing (10). The housing (10) includes an outer shell (11) and a base (12) built inside the outer shell (11). The detection component (20) includes an infrared light source (21) and a detector (22) mounted on the base (12), and a reflection seat (23) built inside the outer shell (11) and disposed opposite to the base (12). The infrared light source (21) and the detector (22) are spaced apart and disposed at one end of the base (12) close to the reflection seat (23). One end of the reflection seat (23) close to the base (12) is provided with an air chamber (231), and the inner wall of the air chamber (231) is a reflective surface. The reflection seat (23) is also provided with an air hole (232) communicating the air chamber (231) with the outside. It is characterized in that: The base (12) is detachably connected to the reflection seat (23) and the outer shell (11). The base (12) is provided with a first installation cavity (13) for installing the infrared light source (21) and a second installation cavity (14) for installing the detector (22) at intervals. It further includes a protection component (30). The protection component (30) includes a first protection sheet (31) and a second protection sheet (32) with high light transmittance. The first protection sheet (31) covers the opening of the first installation cavity (13), and the second protection sheet (32) covers the opening of the second installation cavity (14).

2. The infrared detection module with convenient maintenance according to claim 1, characterized in that, The inner wall of one end of the first installation cavity (13) close to the reflection seat (23) is a parabolic surface, and the focus of the parabolic surface coincides with the light generation point of the infrared light source (21).

3. The simply maintained infrared detection module according to claim 1, characterized in that, The protection component (30) further includes a filter element (33), and the filter element (33) covers the air hole (232).

4. The simply maintainable infrared detection module according to claim 1, wherein, The base (12) is connected to the outer shell (11) by one of the ways of threaded connection, snap connection, and screw connection. One end of the reflection seat (23) abuts against the base (12), and the other end abuts against the outer shell (11).

5. The simply maintainable infrared detection module according to claim 4, characterized in that, A positioning boss (24) is connected to the reflection seat (23), and a positioning groove (15) corresponding to the positioning boss (24) is provided on the base (12).

6. The infrared detection module with easy maintenance according to claim 5, characterized in that, The positioning boss (24) is movably connected to the reflection seat (23). A wiping member (25) is provided at the top of the positioning boss (24), a connecting rod (26) is provided at the bottom of the positioning boss (24), and one end of the connecting rod (26) away from the positioning boss (24) protrudes from the reflection seat (23).

7. The simply maintained infrared detection module according to claim 6, characterized in that, An elastic member (27) is further sleeved on the connecting rod (26). An installation groove (233) for positioning the elastic member (27) is provided on the reflection seat (23). One end of the elastic member (27) abuts against the positioning boss (24), and the other end abuts against the bottom of the installation groove (233).

8. The easily maintained infrared detection module according to claim 6 or 7, characterized in that, A handle (28) is connected to one end of the connecting rod (26) away from the positioning boss (24).

9. The simply maintainable infrared detection module according to claim 6 or 7, characterized in that, The number of the positioning bosses (24) is two, and the wiping members (25) on the two positioning blocks respectively correspond to the first protection sheet (31) and the second protection sheet (32).

10. The simply maintainable infrared detection module according to claim 1, characterized in that, The detection component (20) further includes a PCB main control board (29), the PCB main control board (29) is installed on the base (12), and the PCB main control board (29) is electrically connected to the infrared light source (21) and the detector (22).

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