Coding type fire detector with high sensitivity

Abstract

The utility model discloses a coding type fire detector with high sensitivity. The coding type fire detector comprises a housing; a turnover mechanism is arranged on the left side of the shell and comprises an open groove, a press-fitting top cover and a filter membrane; a detection mechanism is arranged in the shell, the detection mechanism comprises smoke guide baffles, a laser diode, a lens assembly and a convergent mirror, and the smoke guide baffles are arranged on the left side of the connecting plate and distributed in an array mode. According to the coding type fire detector with high sensitivity, the filtering membrane can be placed between the shell and the press-fitting top cover, gas can be conveniently filtered, the precise gas flow detector can detect the speed of gas flow, the high-precision thermosensitive device can detect the temperature of the gas flow, the detection precision is improved, and the cost is reduced. The light absorption plate can absorb the light emitted by the laser diode and the lens assembly, so that the influence of the refracted light on the detection result is avoided, and the detection precision is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a detector technical field, specifically high sensitivity's coding type fire detector. BACKGROUND

[0002] Clean workshop is the production space of the controlled air suspended particle, its design, construction and use should reduce the indoor attraction, produce and bring the bacteria particle as far as possible, clean workshop prevents dust to scatter, and air purification generally adopts the air exchange form of upper sending and lower returning or horizontal forced air supply, and its return air outlet is often arranged at the place close to the ground, which makes the traditional point type photoelectric smoke sensing detector installed on the ceiling to detect the fire signal in the case that the air purification system has not stopped working in the initial stage of fire, often not early warning effect, therefore, for the selection of the fire automatic alarm system detector, the traditional point type photoelectric smoke sensing detector is not suitable.

[0003] Although the traditional suction type smoke fire detector has certain application in the clean area due to its high sensitivity, fast response speed and simple maintenance, it also has the defects that the suction hole can be blocked, smoke can be diluted and it must be adjusted to a higher sensitivity, the longest sampling pipe network of a detection host of the traditional suction type smoke fire detector is 200m, many devices are needed for networking detection in some large places, the cost is higher than that of conventional detectors, and there is no advantage in small area and local protection, in addition, since there are many sampling points on a sampling pipe network, when the device alarms, the detection host cannot distinguish which sampling point alarms, and only which sampling pipe alarms can be judged, and the non-zoning device can only determine which device alarms.

[0004] Therefore, we propose a high-sensitivity coding type fire detector to solve the problems in the above background. Utility model content

[0005] The utility model aims at providing a high-sensitivity coding type fire detector to solve the problems of the traditional suction type smoke fire detector in the above background, that is, the high sensitivity, fast response speed and simple maintenance of the traditional suction type smoke fire detector in the clean area, but the suction hole can be blocked, smoke can be diluted and it must be adjusted to a higher sensitivity.

[0006] To achieve the above object, the utility model provides the following technical scheme: a high-sensitivity coding type fire detector, comprising: a shell,

[0007] Further comprising:

[0008] The left side of the shell is provided with a turnover mechanism, wherein the turnover mechanism comprises a slotted groove, a press-fitting top cover and a filter membrane, the press-fitting top cover is rotatably connected with the shell through a hinge, and the filter membrane is clamped and connected with the slotted groove;

[0009] The inside of the shell is provided with a detection mechanism, wherein the detection mechanism comprises a smoke guide baffle, a laser diode and a lens assembly and a converging mirror, the smoke guide baffle is arranged on the left side of the connecting plate, and the smoke guide baffles are arranged in an array.

[0010] Preferably, a slot is formed in the inside of the shell, and an air suction power base is arranged on the right side of the inside of the shell, and an air suction pump is arranged in the air suction power base.

[0011] Preferably, a precise air flow detector, a high-precision thermal sensitive device and a controller body are arranged on the right side of the inside of the shell, and a magnetic detection switch is arranged on the upper side of the controller body.

[0012] Preferably, a connecting plate is arranged in the inside of the shell, and a detection chamber is formed in the connecting plate.

[0013] Preferably, a laser diode and a lens assembly are arranged on the left side of the rear of the connecting plate, and a light absorption plate is arranged on the left side of the front of the connecting plate, and the laser diode and the lens assembly and the light absorption plate are symmetrically arranged about the vertical central axis of the connecting plate.

[0014] Preferably, a converging mirror is arranged on the left side of the connecting plate, a laser beam is arranged on the upper side of the converging mirror, a photosensitive device is arranged on the right side of the converging mirror, and the photosensitive device is clamped to the connecting plate.

[0015] Compared with the prior art, the advantageous effects of the present application are as follows: the high-sensitivity coding fire detector is characterized in that the filter membrane can be placed in the middle of the shell and the press-fitting top cover, so that the gas can be conveniently filtered, the precise air flow detector can detect the speed of the air flow, the high-precision thermal sensitive device can detect the temperature of the air flow, the detection precision is improved, the light absorption plate can absorb the light emitted by the laser diode and the lens assembly, so that the influence of the refracted light on the detection result is avoided, and the detection precision is further improved.

[0016] 1. The shell is provided with a slot, a press-fitting top cover and a filter membrane, the slot is formed on the left side of the shell, the press-fitting top cover is rotatably connected to the shell, and therefore the filter membrane can be placed in the middle of the shell and the press-fitting top cover, so that the gas can be conveniently filtered.

[0017] 2. The shell is provided with an air suction power base and an air suction pump, the air suction power base is arranged in the inside of the shell, and the air suction pump is arranged in the air suction power base, the air suction pump can continuously and actively collect the air samples in the protection area when working, and the detection is facilitated.

[0018] 3. The precise air flow detector, the high-precision thermal sensitive device and the controller body are arranged, the precise air flow detector can detect the speed of the air flow, the high-precision thermal sensitive device can detect the temperature of the air flow, and the detection precision is improved.

[0019] 4. The connecting plate, smoke guide baffle and detection chamber are arranged, the smoke guide baffle can guide smoke, air flow is conveniently led into the detection chamber, and the sensitivity of detection is conveniently improved.

[0020] 5. The laser diode and lens assembly, light absorbing plate and converging lens are arranged, the light absorbing plate can absorb light emitted by the laser diode and lens assembly, so that the influence of refracted light on the detection result is avoided, and the detection precision is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a connecting plate and detection chamber connecting structure schematic view of the utility model.

[0022] Figure 2 It is a connecting plate and detection chamber connecting structure schematic view of the utility model. Figure 1 It is a connecting plate and detection chamber connecting structure schematic view of the utility model.

[0023] Figure 3 It is a front view structure schematic view of the utility model.

[0024] Figure 4 It is a rear view structure schematic view of the utility model.

[0025] Figure 5 It is a shell cut structure schematic view of the utility model.

[0026] In the drawing: 1, shell; 2, slot; 3, press-fit top cover; 4, filter membrane; 5, air suction power base; 6, air suction pump; 7, precision air flow detector; 8, high-precision thermal device; 9, code controller body; 10, magnetic detection switch; 11, connecting plate; 12, smoke guide baffle; 13, detection chamber; 14, laser diode and lens assembly; 15, light absorbing plate; 16, converging lens; 17, laser beam; 18, photosensitive device. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. DETAILED EMBODIMENT

[0028] The embodiment is a code type fire detector with high sensitivity.

[0029] As Figure 3 , Figure 4 and Figure 5As shown, the inside of the shell 1 is provided with a slot 2, the shell 1 and the press-fit top cover 3 are connected through a hinge, the filter membrane 4 is connected with the slot 2, the right side of the inside of the shell 1 is provided with an air suction power base 5, the inside of the air suction power base 5 is provided with an air suction pump 6, the right side of the inside of the shell 1 is provided with a precise air flow detector 7, a high-precision thermal sensitive device 8 and an encoding controller body 9, and the upper side of the encoding controller body 9 is provided with a magnetic detection switch 10.

[0030] As shown in Figure 1 , Figure 2 and Figure 5 , the inside of the shell 1 is provided with a connecting plate 11, a smoke guiding baffle 12 is arranged on the left side of the connecting plate 11, the smoke guiding baffles 12 are arranged in an array, the inside of the connecting plate 11 is provided with a detection chamber 13, a laser diode and lens assembly 14 are arranged on the left side of the back of the connecting plate 11, an optical absorption plate 15 is arranged on the left side of the front of the connecting plate 11, the laser diode and lens assembly 14 and the optical absorption plate 15 are symmetrically arranged on the front and back of the vertical central axis of the connecting plate 11, a converging mirror 16 is arranged on the left side of the connecting plate 11, a laser beam 17 is arranged on the upper side of the converging mirror 16, and a photosensitive device 18 is arranged on the right side of the converging mirror 16, and the photosensitive device 18 is connected with the connecting plate 11.

[0031] It should be noted that the laser diode and lens assembly 14 uses a laser light source, adopts an internationally advanced laser detection technology, a high-brightness laser diode, and combines special lenses and mirror optical technology to produce a highly focused strong light beam, so that each extremely light smoke particle is scattered in the sensing chamber, and the detection cavity can detect extremely low concentration smoke, thereby achieving high sensitivity;

[0032] The detector is composed of the press-fit top cover 3, the filter membrane 4, the high-sensitivity laser smoke analysis chamber and the air suction power base 5, is sent into a laser detection cavity for analysis, utilizes the forward scattering characteristics of laser to capture scattered light caused by smoke particles in an air sample, converts the scattered light into a pulse signal through a photosensitive element, diagnoses the smoke concentration condition of the environment through artificial intelligence AI technology, and generates corresponding “early warning”, “action”, “fire alarm I” and “fire alarm II” signals according to the smoke concentration and a preset alarm threshold value;

[0033] A precise air flow detector 7 is arranged on the right side of the inside of the detector, when the filter membrane 4 is polluted to seriously hinder the air flow from entering, the detector will send a fault alarm signal to remind the relevant personnel to replace the filter membrane 4; the detector is a bus encoding type, can communicate with a fire alarm controller, and can also mix and code with other encoding products in the same detection loop; the detector is provided with a high-precision thermal sensitive device 8, can perform temperature compensation on the sensitivity of the fire detector, can determine the fire with the aid of temperature changes in the fire occurrence process, has smoke sensing and temperature sensing composite detection functions;

[0034] The detector has high sensitivity and wide sensitivity test range, and is provided with a high-efficiency long-service-life air suction pump 6 and a magnetic detection switch 10, so as to facilitate on-site debugging, maintenance and function check. The detector is preferably installed near the air return port of an air conditioner, and is simple to install. The detector is provided with a 360-degree visible annular high-brightness indicating lamp, and the shell material is PC plastic which is resistant to high temperature and does not deform. The protection area of a single detector can reach 80 square meters, which is equivalent to the protection area of a traditional point-type photoelectric sensing detector. DETAILED EMBODIMENT

[0035] The embodiment is to solve the problem that the filter membrane 4 is inconvenient to replace.

[0036] As shown in Figure 3 , Figure 4 and Figure 5 , the air suction pump 6 in the air suction power base 5 can continuously and actively collect air samples in the protection area when working, and filter out dust particles larger than 5 microns, so as to ensure that the influence of various harsh environments on the smoke effect of the fire detector is excluded, and the false alarm rate of the detector is almost zero. When the filter membrane 4 needs to be replaced, the threaded rod on the lower side of the shell 1 is rotated to open, the shell 1 is disconnected from the press-fitting top cover 3, and the filter membrane 4 can be taken out for replacement. Replacing the filter membrane 4 is simple and fast, and the new filter membrane 4 is placed in the slot 2, and the shell 1 and the press-fitting top cover 3 are reconnected together. DETAILED EMBODIMENT

[0037] The embodiment is to solve the problem that the traditional air suction type smoke detector has room for improvement.

[0038] As shown in Figure 1 , Figure 2 and Figure 5 , the light absorption plate 15 can absorb the light emitted by the laser diode and lens assembly 14, so as to avoid the influence of refracted light on the detection result, and further improve the detection accuracy. The smoke guiding baffle 12 can guide the airflow, so that the airflow flows into the detection chamber 13. The light emitted by the laser diode and lens assembly 14 forms a laser beam 17 on the upper side of the converging lens 16, and then is transmitted to the photosensitive device 18 for analysis. The advantages of the point-type photoelectric smoke detector, the laser smoke detector and the traditional air suction type smoke detector are combined, so that the traditional air suction type smoke detector cancels the pipeline, is miniaturized, and has smoke sensing and temperature sensing composite fire detection functions.

[0039] The content not described in detail in the specification belongs to the prior art known to those skilled in the art, the standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0040] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A highly sensitive coded fire detector comprising: The shell (1); It is characterized in that, further comprising: The left side of the shell (1) is provided with a turnover mechanism, wherein the turnover mechanism comprises a slot (2), a press-fitting top cover (3) and a filter membrane (4), the press-fitting top cover (3) is rotatably connected with the shell (1) through a hinge, and the filter membrane (4) is clampedly connected with the slot (2). The inside of the shell (1) is provided with a detection mechanism, wherein the detection mechanism comprises a smoke guide baffle (12), a laser diode and a lens assembly (14) and a converging lens (16), the smoke guide baffle (12) is arranged on the left side of a connecting plate (11), and the smoke guide baffles (12) are arranged in an array.

2. The high sensitivity coded fire detector according to claim 1, characterized in that: The inside of the shell (1) is provided with a slot (2), the right side of the inside of the shell (1) is provided with an air suction power base (5), and the inside of the air suction power base (5) is provided with an air suction pump (6).

3. The high sensitivity coded fire detector according to claim 1, wherein: The right side of the inside of the shell (1) is provided with a precise airflow detector (7), a high-precision thermal sensitive device (8) and an encoding controller body (9), and a magnetic detection switch (10) is arranged on the upper side of the encoding controller body (9).

4. The high sensitivity coded fire detector according to claim 1, wherein: The inside of the shell (1) is provided with a connecting plate (11), and the inside of the connecting plate (11) is provided with a detection chamber (13).

5. The high sensitivity coded fire detector according to claim 1, wherein: The left side of the connecting plate (11) is provided with a laser diode and a lens assembly (14), the left side of the connecting plate (11) is provided with a light absorption plate (15), and the laser diode and the lens assembly (14) and the light absorption plate (15) are symmetrically arranged about the vertical central axis of the connecting plate (11).

6. The high sensitivity coded fire detector according to claim 1, wherein: The left side of the connecting plate (11) is provided with a converging lens (16), the upper side of the converging lens (16) is provided with a laser beam (17), the right side of the converging lens (16) is provided with a photosensitive device (18), and the photosensitive device (18) is clampedly connected with the connecting plate (11).

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