Smoking detector

Abstract

The utility model relates to the technical field of smoke detection, and discloses a smoking detector, which comprises a mounting base and an upper shell, the top of the mounting base is clamped with the bottom of the upper shell; a lower shell is clamped to the top of the mounting base, and a circuit board is fixedly connected to the top of the lower shell; the parallel light lens is arranged in front of the infrared emission bin, the one-time focal length of the parallel light lens is just aligned with the infrared emission bin, and at the moment, infrared light emitted by the infrared emission bin is refracted into parallel light, so that stronger light can be effectively transmitted to the labyrinth in the base of the detection darkroom; due to the fact that the light intensity is improved, more obvious smoke particles in the maze can refract stronger light beams, similarly, a condensing lens is placed in front of the infrared receiving bin by one time of focal length, at the moment, light reflected in more directions can be gathered to the infrared receiving bin by a convex lens, and therefore the detector can more sensitively receive small-diameter particles.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke detection, in particular to a smoking detector. Background Art

[0002] Photoelectric smoke detectors are composed of light sources, photoelectric elements, electronic switches and maze-like cavity chambers. They use the principle of light scattering to detect smoke generated in the early stages of a fire and send out alarm signals in a timely manner. Photoelectric smoke detectors are divided into two types according to their structure and principle: light-shielding type and scattering type. Among them, the positions of the light-emitting diode and the photosensitive element of the scattering type photoelectric smoke detector are not relative. The photosensitive element is set in a porous small dark room. When there is no smoke, the light cannot hit the photosensitive element, and the circuit maintains a normal state. When there is smoke in a fire, the light reaches the photosensitive element through reflection or scattering of smoke particles, and the optical signal is converted into an electrical signal. Since the actual signal received by the photosensitive element is very weak, the signal needs to be filtered and amplified between the photosensitive element and the processing chip before it can be recognized, and then the alarm device is driven to send out a fire alarm signal. In the signal processing link, weak signals are very easy to be interfered with, and the interference will also be amplified, which can easily affect the sensitivity and stability of the detection results.

[0003] For example, Chinese utility model patent CN109754565B proposes a photoelectric smoke detection darkroom, including a shell, a convex lens, a light source and a photoelectric receiving tube, wherein the shell encloses a chamber of the darkroom, a baffle is arranged inside the shell, and the baffle divides the darkroom into a first part and a second part, a conical surface is arranged on the shell of the first part, and the convex lens and the light source are arranged on the shell of the second part, and the light source is arranged at the focus of the convex lens.

[0004] In the prior art, a convex lens is provided to refract the light, but when collecting the light, the light cannot be well aggregated, which affects the sensitivity of smoke detection. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the utility model provides a smoking detector which has the advantage of being able to more sensitively receive the presence of particles with tiny diameters, and solves the problem that when collecting light, the light cannot be well aggregated, thus affecting the sensitivity of smoke detection.

[0007] (II) Technical solution

[0008] To achieve the above object, the utility model provides the following technical solution: a smoking detector, comprising a mounting base and an upper shell of an outer shell; the top of the mounting base and the bottom of the upper shell of the outer shell are mutually engaged;

[0009] The top of the mounting base is clamped with a lower shell of the outer shell, the top of the lower shell of the outer shell is fixedly connected with a circuit board, and the interior of the lower shell of the outer shell is provided with a detection darkroom base;

[0010] The top of the detection darkroom base is clamped with a detection darkroom component, and the detection darkroom component includes:

[0011] Detection of darkroom cover;

[0012] An infrared receiving chamber is fixedly connected to the bottom of the upper cover of the detection darkroom;

[0013] An infrared emission chamber is fixedly connected to the bottom of the upper cover of the detection darkroom;

[0014] A detection channel is arranged on the top of the upper cover of the detection darkroom;

[0015] A unit circuit board is fixedly connected to the top of the upper cover of the detection darkroom;

[0016] A condenser lens and a parallel light lens are arranged inside the detection darkroom base. The condenser lens is located on one side of the infrared receiving chamber, and the parallel light lens is located on one side of the infrared transmitting chamber.

[0017] Preferably, the mounting base comprises:

[0018] Base outer shell;

[0019] An installation positioning groove is arranged on the upper surface of the base outer shell;

[0020] The wiring electrode sheet is fixedly connected to the top of the installation positioning groove.

[0021] Preferably, the lower shell of the housing comprises:

[0022] Lower housing;

[0023] Installing a positioning pin, fixedly connected to the top of the lower shell;

[0024] The mounting column is arranged at the bottom of the lower shell.

[0025] Preferably, the infrared receiving chamber and the infrared transmitting chamber are arranged at a right angle of ninety degrees to each other.

[0026] Preferably, one focal length of the focusing lens is located on the infrared receiving chamber.

[0027] Preferably, one focal length of the parallel light lens is located on the infrared emission chamber.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the utility model provides a smoking detector with the following beneficial effects:

[0030] 1. The smoking detector is provided with a condenser lens and a parallel light lens. A parallel light lens is placed in front of the infrared transmitting chamber. The 1-fold focal length of the parallel light lens is just aligned with the infrared transmitting chamber. At this time, the infrared light emitted by the infrared transmitting chamber will be refracted into parallel light rays, so that stronger light can be effectively transmitted to the maze in the base of the detection darkroom. Due to the increase in light intensity, the more obvious smoke particles in the maze can refract stronger light beams. Similarly, a condenser lens is placed at 1-fold focal length in front of the infrared receiving chamber. At this time, light reflected from more directions will be aggregated by the convex lens onto the infrared receiving chamber, so the detector can more sensitively receive the presence of particles with tiny diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the utility model;

[0032] Figure 2 It is a stereoscopic diagram of the installation base, the lower shell of the outer shell and the detection darkroom assembly in the utility model.

[0033] In the figure:

[0034] 10. Mounting base; 11. Base outer shell; 12. Mounting positioning groove; 13. Wiring electrode sheet;

[0035] 20. Shell upper shell;

[0036] 30. Outer shell lower shell; 31. Lower shell body; 32. Mounting locating pin; 33. Mounting column;

[0037] 40. Circuit board;

[0038] 50. Check the darkroom base;

[0039] 60. Detection darkroom assembly; 61. Detection darkroom cover; 62. Infrared receiving chamber; 63. Infrared transmitting chamber; 64. Detection channel; 64. Unit circuit board;

[0040] 70. Focusing lens;

[0041] 80. Parallel light lens. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0046] In the related art, a convex lens is provided to refract the light, but when collecting the light, the light cannot be well aggregated, which affects the sensitivity of smoke detection.

[0047] In order to solve the problems in the related technology to a certain extent, an embodiment of the present application provides a smoking detector. By setting a focusing lens and a parallel light lens, a parallel light lens is placed in front of the infrared transmitting chamber, and the 1 times focal length of the parallel light lens is just aligned with the infrared transmitting chamber. At this time, the infrared light emitted by the infrared transmitting chamber will be refracted into parallel light rays, so that stronger light can be effectively transmitted to the maze in the base of the detection darkroom. Due to the increase in light intensity, the more obvious smoke particles in the maze can refract stronger light beams. Similarly, a focusing lens is placed at 1 times the focal length in front of the infrared receiving chamber. At this time, light reflected from more directions will be aggregated by the convex lens onto the infrared receiving chamber, so the detector can more sensitively receive the presence of particles with tiny diameters.

[0048] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0049] Combination Figure 1-Figure 2The embodiment of the present application provides a smoking detector, including a mounting base 10 and an upper shell 20; the top of the mounting base 10 and the bottom of the upper shell 20 are mutually engaged, and the mounting base 10 includes: a base outer shell 11; a mounting positioning groove 12, which is arranged on the upper surface of the base outer shell 11; a wiring electrode sheet 13, which is fixedly connected to the top of the mounting positioning groove 12;

[0050] The top of the mounting base 10 is clamped with a housing lower shell 30, which includes: a lower shell 31; a mounting positioning pin 32, which is fixedly connected to the top of the lower shell 31; a mounting column 33, which is arranged at the bottom of the lower shell 31, a circuit board 40 is fixedly connected to the top of the housing lower shell 30, and a detection darkroom base 50 is arranged inside the housing lower shell 30;

[0051] The top of the detection chamber base 50 is clamped with a detection chamber assembly 60, which includes: a detection chamber upper cover 61; an infrared receiving chamber 62, fixedly connected to the bottom of the detection chamber upper cover 61; an infrared transmitting chamber 63, fixedly connected to the bottom of the detection chamber upper cover 61; a detection channel 64, arranged on the top of the detection chamber upper cover 61; and a unit circuit board 65, fixedly connected to the top of the detection chamber upper cover 61.

[0052] A condenser lens 70 and a collimator lens 80 are provided inside the detection darkroom base 50. The condenser lens 70 is located on one side of the infrared receiving chamber 62, and the collimator lens 80 is located on one side of the infrared transmitting chamber 63.

[0053] 10. Mounting base; 11. Base outer shell; 12. Mounting positioning groove; 13. Wiring electrode sheet;

[0054] 20. Shell upper shell;

[0055] 30. Outer shell lower shell; 31. Lower shell body; 32. Mounting locating pin; 33. Mounting column;

[0056] 40. Circuit board;

[0057] 50. Check the darkroom base;

[0058] 60. Detection darkroom assembly; 61. Detection darkroom cover; 62. Infrared receiving chamber; 63. Infrared transmitting chamber; 64. Detection channel; 64. Unit circuit board;

[0059] 70. Focusing lens;

[0060] 80. Parallel light lens

[0061] The detector emits infrared light of 940 nanometers in wavelength in the pure black smoke maze in the base 50 of the detection darkroom through the infrared transmitting chamber 63, and a 940 nanometer infrared receiving tube (infrared receiving chamber 62) is placed at a 90-degree vertical direction to the infrared transmitting chamber 63; when smoke particles enter the maze, the smoke particles will refract the infrared light emitted by the infrared transmitting tube (infrared transmitting chamber 63) in the maze, and part of the infrared light will be refracted into the infrared receiving tube, and the tiny signal will be amplified by the electronic amplifying circuit (unit circuit board 64) to realize signal collection; in order to detect smoke particles with smaller diameters, the collection system can be more In order to sensitively sense smoke, a convex lens (parallel light lens 80) is placed in front of the infrared transmitting tube, and the 1-fold focal length of the convex lens is just aimed at the infrared transmitting tube. At this time, the infrared light emitted by the infrared transmitting tube will be refracted into parallel light, so that stronger light can be effectively transmitted to the maze. Due to the increase in light intensity, the more visible smoke particles in the maze can refract stronger light beams; similarly, a convex lens (condenser lens 70) is also placed at 1-fold focal length in front of the infrared receiving tube. At this time, light reflected from more directions will be aggregated by the convex lens onto the infrared receiving tube, so the detector can more sensitively receive the existence of particles with tiny diameters.

[0062] In some embodiments, the infrared receiving chamber 62 and the infrared transmitting chamber 63 are arranged at a 90-degree perpendicular angle to each other.

[0063] In some embodiments, one focal length of the focusing lens 70 is located on the infrared receiving chamber 62 .

[0064] In some embodiments, one focal length of the parallel light lens 80 is located on the infrared transmitting chamber 63 .

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0066] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smoking detector, comprising a mounting base (10) and an upper shell (20) of an outer shell; the top of the mounting base (10) and the bottom of the upper shell (20) of the outer shell are mutually engaged; Features: The top of the mounting base (10) is clamped with a lower shell of the outer shell (30), the top of the lower shell of the outer shell (30) is fixedly connected with a circuit board (40), and a detection darkroom base (50) is provided inside the lower shell of the outer shell (30); A detection darkroom assembly (60) is clamped on the top of the detection darkroom base (50), and the detection darkroom assembly (60) comprises: Detecting the darkroom cover (61); An infrared receiving chamber (62) is fixedly connected to the bottom of the upper cover (61) of the detection darkroom; An infrared emission chamber (63) is fixedly connected to the bottom of the upper cover (61) of the detection darkroom; A detection channel (64) is arranged on the top of the detection darkroom upper cover (61); A unit circuit board (65) is fixedly connected to the top of the detection darkroom upper cover (61); A condenser lens (70) and a parallel light lens (80) are provided inside the detection darkroom base (50); the condenser lens (70) is located on one side of the infrared receiving chamber (62), and the parallel light lens (80) is located on one side of the infrared transmitting chamber (63).

2. A smoking detector according to claim 1, characterized in that: The mounting base (10) comprises: Base outer shell (11); An installation positioning groove (12) is arranged on the upper surface of the base outer shell (11); The wiring electrode sheet (13) is fixedly connected to the top of the installation positioning groove (12).

3. A smoking detector according to claim 1, characterized in that: The housing lower shell (30) comprises: Lower housing (31); Installing a positioning pin (32) fixedly connected to the top of the lower housing (31); The mounting column (33) is arranged at the bottom of the lower shell (31).

4. A smoking detector according to claim 1, characterized in that: The infrared receiving chamber (62) and the infrared transmitting chamber (63) are arranged at a 90-degree perpendicular angle to each other.

5. The smoking detector according to claim 1, characterized in that: One focal length of the condenser lens (70) is located on the infrared receiving chamber (62).

6. A smoking detector according to claim 1, characterized in that: One focal length of the parallel light lens (80) is located on the infrared emission chamber (63).

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