Light leakage prevention infrared dust sensor

Abstract

The utility model provides a light leakage prevention infrared dust sensor, which comprises a connecting rod and a light leakage prevention component, a display device is arranged at the left end of the connecting rod, the light leakage prevention component is arranged at the right end of the connecting rod, and a fixing component is arranged on the outer side of the light leakage prevention component. The beneficial effects of the utility model are that through the arrangement of the collection cylinder, the light absorption coating and the shading assembly, the light absorption coating in the supporting cylinder can reduce the influence of emitted light on the infrared photoelectric detector, and the light absorption coatings in the collection cylinder and the connecting pipe can reduce the incidence of external visible light; the infrared photoelectric detector can detect infrared radiation more accurately, the accuracy of the sensor is improved, in addition, the fixing part convenient to disassemble is arranged, dust adsorbed on the surface of the inner wall of the collecting barrel and the surface of the lens can be cleaned conveniently, and the problem that the adsorbed dust absorbs infrared light, and consequently detection is not accurate enough is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and particularly relates to an infrared dust sensor that prevents light leakage. Background Art

[0002] A dust sensor is a device used to detect dust concentration and particulate matter in the air. Dust sensors play an important role in modern society. They help us monitor and improve air quality and protect public health. Since the working principle of the sensor relies on measuring the absorption of infrared light, if the sensor does not have a light leakage-proof structure, external light sources can easily enter the sensor's detection area. This interference will affect the reception of infrared signals, causing the sensor to misjudge the dust concentration. The signal output by the sensor will no longer be the true concentration information of the dust, but a mixed value, resulting in inaccurate measurement. Therefore, we hope to design a light leakage-proof infrared dust sensor to solve this problem. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an infrared dust sensor that prevents light leakage and solves the problems raised in the above background technology.

[0004] The utility model is implemented through the following technical solutions: an infrared dust sensor with light leakage prevention, comprising a connecting rod and a light leakage prevention component, wherein a display device is provided at the left end of the connecting rod, the light leakage prevention component is provided at the right end of the connecting rod, and a fixing component is provided on the outer side of the light leakage prevention component;

[0005] The anti-light leakage component includes a support tube, the interior of the support tube is fixedly connected to a mounting plate, the inner wall surface of the support tube is provided with a light-absorbing coating, the interior of the support tube is fixedly connected to a limiting ring, the right side surface of the limiting ring is fixedly connected to one side of a sealing gasket 1, the other side of the sealing gasket 1 is provided with one side of a lens, and the other side of the lens is provided with a sealing gasket 2. The interior of the support tube is screwed with a collecting tube through a thread, the left end of the collecting tube is fixedly connected to the sealing gasket 2, and the right end of the collecting tube is provided with a light-shielding component. By arranging the anti-light leakage component, the interference of ambient light is reduced, ensuring that the infrared photoelectric detector can detect infrared radiation more accurately, and improving the accuracy of the sensor.

[0006] As a preferred embodiment, the mounting plate is provided with an infrared emitter for emitting light and an infrared photodetector for detecting scattered light.

[0007] As a preferred embodiment, connecting pipes for air intake and air outlet are respectively provided at the front and rear ends of the collecting tube, and the inner walls of the connecting pipes and the collecting tube are both provided with light-absorbing coatings for reducing light reflection. By providing light-absorbing coatings on the inner walls of the collecting tube and the connecting pipe, light is prevented from entering the interior of the collecting tube.

[0008] As a preferred embodiment, the shading assembly includes a connecting disk, on which a sealing ring is provided for preventing light from penetrating. The connecting disk is fixedly connected to the collecting tube via the sealing ring. A reflector for reflecting the light source is provided on the inner side of the connecting disk. By setting up the shading assembly, ambient light is prevented from entering the interior of the collecting tube.

[0009] As a preferred embodiment, the fixing component includes a mounting rod, the left end of the mounting rod is fixedly connected to the support tube, the right end of the mounting rod is in contact with the connecting disk, and the outer side of the mounting rod is fixedly connected to the support frame; an insertion rod is slidingly passed through the interior of the support frame, a spring is provided on the outer side of the insertion rod, and a ring is fixedly sleeved on the outer side of the insertion rod, and the ring is elastically connected to the support frame through the spring. By setting the fixing component, the shading assembly can be limited and fixed.

[0010] As a preferred embodiment, the left side of the connecting disk is fixedly connected to a limiting rod, the limiting rod is slidably sleeved inside the mounting rod, the lower end of the insertion rod slides through the inside of the mounting rod, and the lower end of the insertion rod is movably sleeved inside the limiting rod. By arranging an insertion rod that is easy to disassemble and cooperates with the limiting rod, the disassembly of the connecting disk is more convenient, and it is further convenient to clean the dust on the lens surface and the inner wall of the collection tube.

[0011] As a preferred embodiment, the upper ends of the insertion rods are fixedly connected with connecting rods for synchronously displacing the two insertion rods.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are as follows: by setting a collecting tube, a light-absorbing coating and a light-shielding component, the light-absorbing coating in the supporting tube can reduce the influence of the emitted light on the infrared photoelectric detector, and the light-absorbing coating in the collecting tube and the connecting tube can reduce the incidence of external visible light. At the same time, by setting a lens, the external visible light is further filtered to reduce the interference of ambient light, ensuring that the infrared photoelectric detector can detect infrared radiation more accurately and improve the accuracy of the sensor. In addition, by setting a fixing component that is easy to disassemble, the connecting plate is easy to disassemble, and it is further easy to clean the dust adsorbed on the inner wall surface of the collecting tube and the lens surface, to prevent the adsorbed dust from absorbing infrared light and causing the detection to be inaccurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 This is a front right oblique view of the overall structure of a light leakage-proof infrared dust sensor of the present invention.

[0015] Figure 2 This is a partial structural cross-sectional view of a light leakage-proof infrared dust sensor of the present invention.

[0016] Figure 3 This is a partial structural cross-sectional view of a light leakage-proof infrared dust sensor of the present invention.

[0017] Figure 4 This utility model is an infrared dust sensor that prevents light leakage Figure 3 A magnified view of the structure of part A.

[0018] In the figure, 1-connecting rod, 2-display device, 3-light leakage prevention component, 4-fixing component;

[0019] 31-support tube, 32-mounting plate, 33-light-absorbing coating, 34-limiting ring, 35-sealing gasket 1, 36-lens, 37-sealing gasket 2, 38-collecting tube, 39-light-shielding component, 391-connecting plate, 392-sealing ring;

[0020] 41-mounting rod, 42-support frame, 43-insertion rod, 44-spring, 45-limiting rod, 46-connecting rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: an infrared dust sensor with anti-light leakage, comprising a connecting rod 1 and an anti-light leakage component 3, wherein a display device 2 is provided at the left end of the connecting rod 1, and the anti-light leakage component 3 is provided at the right end of the connecting rod 1, and a fixing component 4 is provided on the outside of the anti-light leakage component 3;

[0023] The anti-light leakage component 3 includes a support tube 31, the interior of the support tube 31 is fixedly connected to a mounting plate 32, the inner wall surface of the support tube 31 is provided with a light-absorbing coating 33, the interior of the support tube 31 is fixedly connected to a limit ring 34, the right side surface of the limit ring 34 is fixedly connected to one side of a sealing gasket 35, the other side of the sealing gasket 35 is provided with one side of a lens 36, and the other side of the lens 36 is provided with a sealing gasket 2 37. The interior of the support tube 31 is screwed with a collecting tube 38 by a thread, the left end of the collecting tube 38 is fixedly connected to the sealing gasket 2 37, and the right end of the collecting tube 38 is provided with a light-shielding component 39. By providing the anti-light leakage component 3, the interference of ambient light is reduced, ensuring that the infrared photoelectric detector can detect infrared radiation more accurately, and improving the accuracy of the sensor.

[0024] An infrared emitter for emitting light and an infrared photodetector for detecting scattered light are provided on the mounting plate 32 .

[0025] The front and rear ends of the collecting tube 38 are respectively provided with connecting pipes for air intake and exhaust. The inner walls of the connecting pipes and the collecting tube 38 are both provided with a light-absorbing coating 33 for reducing light reflection. By providing the light-absorbing coating 33 on the inner walls of the collecting tube 38 and the connecting pipe, light is prevented from entering the interior of the collecting tube 38.

[0026] The shading assembly 39 includes a connecting disk 391, on which a sealing ring 392 is provided for preventing light from penetrating. The connecting disk 391 is fixedly connected to the collecting tube 38 through the sealing ring 392. A reflector for reflecting the light source is provided on the inner side of the connecting disk 391. By setting the shading assembly 39, ambient light is prevented from entering the interior of the collecting tube 38.

[0027] The fixing component 4 includes a mounting rod 41, the left end of the mounting rod 41 is fixedly connected to the support tube 31, the right end of the mounting rod 41 is in contact with the connecting plate 391, and the outer side of the mounting rod 41 is fixedly connected to the support frame 42; the inner side of the support frame 42 is slidably penetrated by an insertion rod 43, and a spring 44 is provided on the outer side of the insertion rod 43, and a ring is fixedly sleeved on the outer side of the insertion rod 43, and the ring and the support frame 42 are elastically connected by the spring 44. By setting the fixing component 4, the shading component 39 can be limited and fixed.

[0028] The left side of the connecting disk 391 is fixedly connected to the limiting rod 45, and the limiting rod 45 is slidably sleeved on the inside of the mounting rod 41. The lower end of the insertion rod 43 slides through the inside of the mounting rod 41, and the lower end of the insertion rod 43 is movably sleeved on the inside of the limiting rod 45. By arranging the insertion rod 43 that is easy to disassemble and cooperating with the limiting rod 45, the disassembly of the connecting disk 391 is more convenient, and it is further convenient to clean the dust on the surface of the lens 36 and the inner wall of the collecting tube 38.

[0029] The upper end of the insertion rod 43 is fixedly connected to a connecting rod for synchronously displacing the two insertion rods.

[0030] See also Figures 1 to 3 , as the first embodiment of the present invention: when the sensor needs to be used, first put the lens 36 into the interior of the support tube 31 so that it contacts the sealing gasket 1 35. The lens 36 can filter the ambient light to prevent it from affecting the accuracy of the infrared photoelectric detector. Then, the collecting tube 38 is screwed into the interior of the support tube 31 through a thread. During the screwing process, the collecting tube 38 drives the sealing gasket 2 37 fixed to it to move. When the sealing gasket 2 37 moves to contact the lens 36, the collection tube 38 is stopped. The sealing gasket 1 35 and the sealing gasket 2 37 are both made of rubber, which can seal and prevent visible light from penetrating while preventing Prevent the lens 36 from breaking due to the pressure of the collecting tube 38, and then insert the limiting rod 45 on the connecting disk 391 into the interior of the mounting rod 41 to complete the installation of the connecting disk 391, preventing the external ambient light source from entering the interior of the collecting tube 38, and further improving the detection accuracy. Finally, start the infrared transmitter, and the infrared light beam first passes through the lens 36 and the air in the collecting tube 38 to illuminate the reflector, and then is reflected by the reflector. The reflected infrared light beam will pass through the lens 36 again and be captured by the infrared photoelectric detector. Finally, the light signal is converted into an electrical signal after analysis to display the dust concentration on the display device 2.

[0031] See also Figure 1 、 Figure 3 、 Figure 4 , as the second embodiment of the present invention: based on the description in the above embodiment, further, when it is necessary to clean the lens 36 in the support tube 31 and the inner wall of the collecting tube 38, first pull the connecting rod upward, and the connecting rod drives the insertion rods 43 on both sides to displace. During the displacement, the insertion rod 43 drives the ring fixed to it to displace, and at the same time, the ring compresses the spring 44 to deform it. When the insertion rod 43 moves to the inside of the separation limit rod 45, the connecting plate 391 is pulled to the right side of the collecting tube 38 to remove it, and then the surface of the lens 36 and the inner wall of the collecting tube 38 can be cleaned to prevent the adsorption of dust from affecting the detection results.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light-leakage-proof infrared dust sensor, comprising: A connecting rod (1) and a light leakage prevention component (3), characterized in that a display device (2) is provided at the left end of the connecting rod (1), a light leakage prevention component (3) is provided at the right end of the connecting rod (1), and a fixing component (4) is provided outside the light leakage prevention component (3); The light leakage prevention component (3) includes a support tube (31), the interior of the support tube (31) is fixedly connected to a mounting plate (32), the inner wall surface of the support tube (31) is provided with a light absorbing coating (33), the interior of the support tube (31) is fixedly connected to a limit ring (34), the right side surface of the limit ring (34) is fixedly connected to one side of a sealing gasket (35), the other side of the sealing gasket (35) is provided with one side of a lens (36), the other side of the lens (36) is provided with a sealing gasket (37), the interior of the support tube (31) is screwed with a collecting tube (38) by means of a thread, the left end of the collecting tube (38) is fixedly connected to the sealing gasket (37), and the right end of the collecting tube (38) is provided with a light shielding component (39).

2. The light leakage-proof infrared dust sensor according to claim 1, characterized in that: An infrared emitter for emitting light and an infrared photoelectric detector for detecting scattered light are provided on the mounting plate (32).

3. The light leakage-proof infrared dust sensor according to claim 1, characterized in that: Connecting pipes for air intake and air outlet are respectively provided at the front and rear ends of the collecting cylinder (38), and the inner walls of the connecting pipes and the collecting cylinder (38) are both provided with a light-absorbing coating (33) for reducing light reflection.

4. The light leakage-proof infrared dust sensor according to claim 1, characterized in that: The light shielding assembly (39) comprises a connecting disk (391), a sealing ring (392) for preventing light from penetrating is provided on the connecting disk (391), the connecting disk (391) is fixedly connected to the collecting cylinder (38) via the sealing ring (392), and a reflector for reflecting the light source is provided on the inner side of the connecting disk (391).

5. The light leakage-proof infrared dust sensor according to claim 1, characterized in that: The fixing component (4) includes a mounting rod (41), the left end of the mounting rod (41) is fixedly connected to the support tube (31), the right end of the mounting rod (41) is in contact with the connecting plate (391), and the outer side of the mounting rod (41) is fixedly connected to the support frame (42); an insert rod (43) is slidably passed through the interior of the support frame (42), a spring (44) is provided on the outer side of the insert rod (43), and a collar is fixedly sleeved on the outer side of the insert rod (43), and the collar is elastically connected to the support frame (42) via the spring (44).

6. The light leakage-proof infrared dust sensor according to claim 5, characterized in that: The left side of the connecting plate (391) is fixedly connected to a limiting rod (45), the limiting rod (45) is slidably sleeved inside the mounting rod (41), the lower end of the insertion rod (43) slides through the inside of the mounting rod (41), and the lower end of the insertion rod (43) is movably sleeved inside the limiting rod (45).

7. The light leakage-proof infrared dust sensor according to claim 6, characterized in that: One end of the insertion rod (43) away from the collecting cylinder (38) is fixedly connected to a connecting rod (46) for synchronously displacing the two insertion rods.

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