CN217606428U

CN217606428U - Labyrinth structure for smoke detection

Info

Publication number: CN217606428U
Application number: CN202123322080.7U
Authority: CN
Inventors: 赵知宇; 刘子彦; 李光
Original assignee: Shengguangdingxun Intelligent Technology Co ltd
Current assignee: Shengguangdingxun Intelligent Technology Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-10-18
Anticipated expiration: 2031-12-27

Abstract

The utility model provides a have the labyrinth structure that is used for smog to survey, this labyrinth structure is arranged in smoke detector, and this smoke detector is including the labyrinth bottom, the shield cover is installed to the top at the labyrinth bottom, and the circuit board is installed in the top of detaining in, and detains in and to set up the top position in the base, the inlet port has been seted up on the labyrinth cover, and the inside of this labyrinth cover is provided with folded plate and arc respectively. The labyrinth structure for smoke detection adopts dual-waveband double-number scattering, utilizes the principle that two bundles of optical fibers with different wavelengths generate different scattering intensities on particles with different particle diameters, combines the principle that the scattering angles are different front and back, and has different scattering intensities on the particles with different particle diameters, eliminates smoke particles with large particle diameters, greatly reduces the generation of false alarms, and can eliminate false alarms caused by interference factors with particle diameters of more than 500 mu m and most water vapor and dust particles of the interference factors with particle diameters of more than 500 mu m; the overall false alarm rate can be reduced by 30 percent, and the working intensity of fire-fighting operators on duty is reduced.

Description

Labyrinth structure for smoke detection

Technical Field

The utility model relates to a smoke detector technical field specifically discloses a labyrinth structure for smoke detection.

Background

The smoke detector realizes fire prevention mainly by monitoring smoke concentration, the smoke detector adopts ion type smoke sensing, the ion type smoke sensor is a sensor with advanced technology and stable and reliable work, the smoke detector is widely applied to various fire alarm systems, the performance of the smoke detector is far superior to that of a gas-sensitive resistor type fire alarm, a radioactive source americium 241 is arranged in an inner ionization chamber and an outer ionization chamber of the smoke detector, and positive ions and negative ions generated by ionization respectively move towards positive electrodes and negative electrodes under the action of an electric field. Under normal conditions, the current and voltage of the inner ionization chamber and the outer ionization chamber are stable. Once smoke escapes from the outer ionization chamber. The normal movement of charged particles is interfered, the current and the voltage are changed, the balance between the inner ionization chamber and the outer ionization chamber is damaged, and then the wireless transmitter sends out a wireless alarm signal to inform a remote receiving host machine and transmit the alarm information;

however, the labyrinth structure of the existing similar products can not distinguish the size of smoke particle size in the smoke detection process, and as a result, the smoke, dust and water vapor can not be distinguished in the detection process, so that the false alarm frequency of the system is greatly higher than the real fire alarm frequency.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect or not enough among the prior art, this application aims at providing the labyrinth structure that is used for smog to survey, and this labyrinth structure is arranged in smoke detector, and this smoke detector is including the maze end, the shield cover is installed to the top at the maze end, and the upper end of shield cover is provided with the labyrinth cover, the labyrinth cover is installed in the inside below position of upper cover, and the upper end intermediate position of upper cover has the leaded light post, the contact is installed to the below at the maze end, and the below of going up the contact is provided with the circuit board, the top of detaining in is installed to the circuit board, and well detain and set up the top position in the base, the inlet port has been seted up on the labyrinth cover, and the inside of this labyrinth cover is provided with folded plate and arc respectively.

Preferably, the fumes pass through the labyrinth cover into it.

Preferably, the emission-reception angle of the infrared photodiode is 120 °.

Preferably, the emission and receiving included angle of the blue light diode is 135 degrees.

Preferably, a plurality of said flaps constitute a labyrinth heat sink region and a plurality of clusters of 150 ° flaps constitute optical traps.

Preferably, the labyrinth cover has a circular cross-section.

Has the advantages that: according to the labyrinth structure for smoke detection, smoke enters the labyrinth structure through the labyrinth cover 3, the transmitting and receiving included angle of an infrared photodiode is 120 degrees, the transmitting and receiving included angle of a blue light diode is 135 degrees, a plurality of folded plates 11 form a labyrinth radiating area, a plurality of folded plate clusters of 150 degrees form an optical trap, dual-band even-number scattering is adopted, the principle that two beams of optical fibers with different wavelengths generate different scattering intensities on particles with different particle diameters is utilized, the principle that the scattering intensities of the particles with different particle diameters are different in combination with the fact that the front scattering angle and the rear scattering angle are different, smoke particles with large particle diameters are removed, the generation of false alarms is greatly reduced, false alarms caused by interference factors with particle diameters of more than 500um, most of water vapor and dust particles of the interference factors with particle diameters of more than 500um can be removed; the overall false alarm rate can be reduced by 30 percent, and the working intensity of fire-fighting operators on duty is reduced.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of the overall structure of a smoke detector;

FIG. 2 is a schematic structural view of the labyrinth cover of the present invention;

FIG. 3 is a side view of the labyrinth cover of the present invention;

in the figure: 1. a light guide pillar; 2. an upper cover; 3. a labyrinth cover; 4. a shield case; 5. the fundus of the maze; 6. an upper contact piece; 7. a circuit board; 8. middle buckle; 9. a base; 10. an air inlet; 11. folding the plate; 12. an arc-shaped plate.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

The embodiment of the utility model provides an in the attached drawing: the different types of hatching in the figures are not given the national standards, do not require the material of the elements, and distinguish between cross-sectional views of the elements in the figures.

Referring to fig. 1-3, the labyrinth structure for smoke detection is used in a smoke detector, the smoke detector includes a labyrinth bottom 5, a shielding cover 4 is installed above the labyrinth bottom 5, a labyrinth cover 3 is installed at the upper end of the shielding cover 4, the labyrinth cover 3 is installed at the lower position inside the upper cover 2, a light guide column 1 is arranged at the middle position of the upper end of the upper cover 2, an upper contact piece 6 is installed below the labyrinth bottom 5, a circuit board 7 is arranged below the upper contact piece 6, the circuit board 7 is installed above a middle buckle 8, the middle buckle 8 is arranged at the upper position of a base 9, an air inlet 10 is opened on the labyrinth cover 3, and a folded plate 11 and an arc-shaped plate 12 are respectively arranged inside the labyrinth cover 3.

Wherein the fumes pass through said labyrinth cover 3 into it.

Wherein, the emitting and receiving included angle of the infrared photodiode is 120 degrees.

Wherein, the emitting and receiving included angle of the blue light diode is 135 degrees.

Wherein the plurality of flaps 11 form a labyrinth heat sink region and the plurality of clusters of flaps of 150 ° form optical traps.

Wherein the labyrinth cover 3 is circular in cross section.

It should be noted that the smoke detector is used in a smoke detector, and the smoke detector is composed of a labyrinth bottom 5, a shielding cover 4, a labyrinth cover 3, an upper cover 2, a light guide column 1, an upper contact 6, a circuit board 7, a middle buckle 8 and a base 9;

in the labyrinth structure for smoke detection, smoke enters the labyrinth structure through the labyrinth cover 3, the transmitting and receiving included angle of an infrared photodiode is 120 degrees, the transmitting and receiving included angle of a blue light diode is 135 degrees, a plurality of folded plates 11 form a labyrinth radiating area, a plurality of folded plate clusters of 150 degrees form an optical trap, dual-band even-number scattering is adopted, the smoke particles with large particle size are removed by utilizing the principle that two beams of optical fibers with different wavelengths generate different scattering intensities on the particles with different particle sizes and combining the principle that the front scattering angle and the rear scattering angle are different and the scattering intensities of the particles with different particle sizes are different, the false alarm caused by the interference factors with particle sizes of more than 500um, most of water vapor and dust particles of the interference factors with particle sizes of more than 500um can be removed; the overall false alarm rate can be reduced by 30 percent, and the working intensity of fire-fighting operators on duty is reduced.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A labyrinth structure for smoke detection, this labyrinth structure is arranged in smoke detector, and this smoke detector includes maze bottom (5), its characterized in that: shielding cover (4) are installed to the top of labyrinth bottom (5), and the upper end of shielding cover (4) is provided with labyrinth lid (3), install in the inside below position of upper cover (2) labyrinth lid (3), and the upper end intermediate position of upper cover (2) has leaded light post (1), contact (6) are installed to the below of labyrinth bottom (5), and the below of going up contact (6) is provided with circuit board (7), install in the top of detaining (8) circuit board (7), and well detain (8) and set up in the top position of base (9), inlet port (10) have been seted up on labyrinth lid (3), and the inside of this labyrinth lid (3) is provided with folded plate (11) and arc (12) respectively.

2. The labyrinth for smoke detection as defined in claim 1, wherein: the fumes pass through the labyrinth cover (3) into it.

3. The labyrinth for smoke detection as defined in claim 1, wherein: the emitting and receiving included angle of the infrared photodiode is 120 degrees.

4. The labyrinth for smoke detection as defined in claim 1, wherein: the emitting and receiving included angle of the blue light diode is 135 degrees.

5. The labyrinth for smoke detection as defined in claim 1, wherein: a plurality of the folding plates (11) form a labyrinth heat dissipation area, and a plurality of folding plate clusters with the angle of 150 degrees form an optical trap.

6. The labyrinth for smoke detection as defined in claim 1, wherein: the cross section of the labyrinth cover (3) is circular.