CN221040197U - Independent fire alarm detector - Google Patents

Abstract

The utility model relates to the technical field of fire safety, in particular to an independent fire alarm detector. The utility model provides a stand alone type fire alarm detector, includes shell and detachable apron of connecting on the shell, is provided with a plurality of smoke inlets on the shell, still includes fixed connection in the inboard maze of shell, the maze internal fixation is equipped with first light emission unit, second light emission unit and light receiving unit, the contained angle of first light emission unit and second light emission unit and light receiving unit is obtuse angle and acute angle respectively, peg graft in one side of maze has the maze lid, fixed being equipped with a plurality of fixed plates on the maze, adjacent form a plurality of openings between the fixed plate, each all be equipped with the baffle on the fixed plate, each form between the baffle and communicate in open-ended flue. Through the obtuse angle and acute angle designs formed by the first light emitting unit, the second light emitting unit and the light receiving unit, forward scattering and backward scattering are formed in the labyrinth, so that the missing report of the detector is prevented.

Description

Independent fire alarm detector

Technical Field

The utility model relates to the technical field of fire safety, in particular to an independent fire alarm detector.

Background

The independent fire alarm detector generally comprises an independent smoke-sensing fire alarm detector and an independent temperature-sensing fire alarm detector, has wider application range, and is generally installed in crowded buildings and places such as dormitories, building site work sheds, home hotels, small catering places, small public entertainment places, small shops and the like.

The labyrinth of the independent smoke-sensing detector is a core component, when a fire disaster happens, smoke passes through a smoke inlet seam to enter the labyrinth, the smoke scatters infrared rays emitted by an infrared emission tube, the infrared rays are received by a receiving tube, the labyrinth converts optical signals into electric signals, the electric signals rise along with the smoke concentration until an alarm is triggered to give an alarm, however, due to the adoption of a forward astigmatic structural design, the range of the detectable fire disaster smoke spectrum is narrow, and especially the black smoke detection effect is poor, so that the detector cannot timely detect the fire disaster, the detector fails to report, and the personal and property safety of the masses cannot be ensured as expected.

Disclosure of utility model

The object of the present utility model is to provide a free standing fire alarm detector which solves the above mentioned drawbacks of the prior art.

In order to achieve the above object, the present utility model provides the following technical solutions:

The utility model provides a stand alone type fire alarm detector, includes shell and detachable apron of connecting on the shell, is provided with a plurality of smoke inlets on the shell, still includes fixed connection in the inboard maze of shell, the maze internal fixation is equipped with first light emission unit, second light emission unit and light receiving unit, the contained angle of first light emission unit and light receiving unit is the obtuse angle, the contained angle of second light emission unit and light receiving unit is the acute angle, peg graft in one side of maze has the maze lid, fixed being equipped with a plurality of fixed plates on the maze, adjacent form a plurality of openings between the fixed plate, each all be equipped with the baffle on the fixed plate, form between the baffle and communicate in open-ended flue.

In a further embodiment of the present utility model, the emitting ends of the first light emitting unit and the second light emitting unit and the receiving end of the light receiving unit are disposed obliquely.

In a further embodiment of the present utility model, the baffle is disposed in a V-shape.

In a further embodiment of the present utility model, an insect-proof net is disposed on the smoke inlet.

In a further embodiment of the present utility model, the cover plate is connected with a PCB control board and a battery, the PCB control board is electrically connected with the battery, and the PCB control board is electrically connected with a buzzer, an indicator light and a button.

In the technical scheme, the independent fire alarm detector provided by the utility model has the beneficial effects that:

1. The included angle between the first light emitting unit and the light receiving unit is an obtuse angle, and the included angle between the second light emitting unit and the light receiving unit is an acute angle, so that forward scattering and backward scattering are formed in the labyrinth, the forward scattering is used for distinguishing gray smoke and the backward scattering is used for distinguishing black smoke, and therefore the missing report of the detector is prevented.

2. Through the design of infrared light and blue light, utilize infrared light and blue light to the different current signals that the scattering difference of steam formed, utilize the algorithm that presets in the hardware on the PCB control panel to judge, distinguish steam from the smog, prevent that the scattering of steam from leading to the false alarm of detector.

3. The V-shaped baffle plate is adopted, so that a convenient channel is provided for smoke to smoothly enter the detector, the smoke can be prevented from being influenced by the external wind speed, the interference of ambient light around the detector can be weakened, and the detector is more accurate to detect.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic view of an overall structure provided by an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an exploded view structure of a detector according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a maze according to an embodiment of the present utility model.

Reference numerals illustrate:

1. A housing; 11. a smoke inlet; 12. an insect-proof net; 13. a lamp hole; 14. a buttonhole; 2. a cover plate; 21. a battery; 3. a maze; 31. a labyrinth cover; 32. a first light emitting unit; 33. a second light emitting unit; 34. a light receiving unit; 35. a fixing plate; 36. a baffle; 37. a flue; 4. a PCB control board; 41. a buzzer; 42. an indicator light; 43. a button.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Referring to fig. 1-3, an independent fire alarm detector comprises a housing 1 and a cover plate 2 detachably connected to the housing 1, wherein the housing 1 is provided with a plurality of smoke inlets 11, the independent fire alarm detector further comprises a labyrinth 3 fixedly connected to the inner side of the housing 1, a first light emitting unit 32, a second light emitting unit 33 and a light receiving unit 34 are fixedly arranged in the labyrinth 3, an included angle between the first light emitting unit 32 and the light receiving unit 34 is an obtuse angle, an included angle between the second light emitting unit 33 and the light receiving unit 34 is an acute angle, so that forward scattering and backward scattering are formed, the first light emitting unit 32 for forward scattering is mainly used for judging ash and white smoke, the second light emitting unit 33 for backward scattering is used for judging black smoke, the detection accuracy of the detector is further enhanced, personal and property loss caused by missed report of the detector is prevented, a plurality of fixing plates 35 are fixedly arranged on one side of the labyrinth 3, a plurality of openings are formed between the fixing plates 35, the fixing plates 35 are respectively provided with a plurality of fixing plates 36, the detecting plates 36 are respectively communicated with the ash and smoke inlets 37 are formed by the forward scattering detector, and the smoke inlets 37 are communicated with the smoke inlets 37; the light sources of the first light emitting unit 32 and the second light emitting unit 33 are respectively infrared light and blue light, different current signals formed by scattering differences of the infrared light and the blue light on water vapor are judged through an algorithm preset in hardware on a control panel, the water vapor is distinguished from the smoke, and misinformation of a detector caused by scattering of the water vapor is prevented.

In a further embodiment of the present utility model, the emitting ends of the first light emitting unit 32 and the second light emitting unit 33 and the receiving end of the light receiving unit 34 are disposed obliquely, when the light emitted by the first light emitting unit 32 and the second light emitting unit 33 are in the same horizontal plane, the detector can only monitor the smoke of the horizontal plane, and when the light emitted by the first light emitting unit 32 and the second light emitting unit 33 is oblique, the detector monitors the vertical plane where the first light emitting unit 32 and the second light emitting unit 33 and the light receiving unit 34 are located, and the smoke of the fire scene moves along the ceiling generally, so the detector monitors the vertical side more accurately.

In a further embodiment of the present utility model, the baffle 36 is disposed in a V shape, which provides a convenient path for the smoke to smoothly enter the detector, and also ensures that the smoke is not affected by the external wind speed.

In a further embodiment of the present utility model, the smoke inlet 11 is provided with an insect-proof net 12, which prevents mosquitoes from entering the detector, and prevents the detector from being damaged or misinformation caused by the mosquitoes.

In a further embodiment of the present utility model, the cover plate 2 is connected with the PCB control board 4 and the battery 21, the PCB control board 4 is electrically connected with the buzzer 41, the indicator light 42 and the button 43, the casing 1 is respectively provided with the light hole 13 and the button hole 14 corresponding to the indicator light 42 and the button 43, when the detector detects a fire, the buzzer 41 emits an alarm sound, the indicator light 42 emits a warning light, and the button 43 can be used for resetting the detector to stop sounding and lighting.

Working principle:

When smoke generated by a fire disaster enters the inside of the detector through the smoke inlet 11, and flows into the labyrinth 3 of the detector through the flue 37, smoke particles scatter light emitted by the first light emitting unit 32 and the second light emitting unit 33, wherein the forward scattered light emitting unit is used for judging ash smoke, the backward scattered light emitting unit is used for judging black smoke, the light receiving unit 34 generates current when receiving the light scattered by the smoke particles, the buzzer 41 sounds an alarm as the concentration rises until the detector is triggered to alarm, the indicator lamp 42 emits warning light, and the button 43 can be used for resetting the detector to stop sounding and lighting.

Different electric signals formed by scattering differences of infrared light and blue light on water vapor are utilized, the water vapor is distinguished from smoke by utilizing an algorithm preset in hardware on the PCB control board 4, and false alarm of a detector caused by scattering of the water vapor is prevented.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims (5)

1. The utility model provides a stand alone type fire alarm detector, includes cover (2) on shell (1) and detachable connection on shell (1), is provided with a plurality of smoke inlets (11), its characterized in that on shell (1):

Still include fixed connection in the inboard maze (3) of shell (1), maze (3) internal fixation is equipped with first light emission unit (32), second light emission unit (33) and light receiving unit (34), the contained angle of first light emission unit (32) and light receiving unit (34) is the obtuse angle, the contained angle of second light emission unit (33) and light receiving unit (34) is the acute angle, peg graft in one side of maze (3) has maze lid (31), be equipped with a plurality of fixed plates (35) on maze (3), adjacent form a plurality of openings between fixed plate (35), each all be equipped with baffle (36) on fixed plate (35), each form between baffle (36) and communicate in open-ended flue (37).

2. The free-standing fire alarm detector according to claim 1, wherein the emitting ends of the first light emitting unit (32) and the second light emitting unit (33) are arranged obliquely to the receiving end of the light receiving unit (34).

3. A freestanding fire alarm detector as claimed in claim 1 wherein the baffle (36) is arranged in a V-shape.

4. A freestanding fire alarm detector according to claim 1, characterized in that the smoke inlet (11) is provided with an insect-proof net (12).

5. The independent fire alarm detector according to claim 1, wherein the cover plate (2) is connected with a PCB control board (4) and a battery (21), the PCB control board (4) is electrically connected with the battery (21), and the PCB control board (4) is electrically connected with a buzzer (41), an indicator light (42) and a button (43).