CN2572398Y

CN2572398Y - Labyrinth for smoke-sensing detector

Info

Publication number: CN2572398Y
Application number: CN 02260650
Authority: CN
Inventors: 黄照祺
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-13
Filing date: 2002-10-13
Publication date: 2003-09-10
Anticipated expiration: 2012-10-13

Abstract

The utility model provides a labyrinth for a smoke-sensing detector, which comprises a labyrinth body and a labyrinth cover, wherein, the labyrinth body is provided with a cylindrical cavity, and the internal part of the cavity is provided with an installing seat of a luminous tube, an installing seat of a receiving tube, a refracting sheet, etc. Compared with the traditional labyrinth, the utility model has differences that plane projection of the two installing seats of the labyrinth for a smoke-sensing detector forms an included angle about 135 DEG, and a light barrier column is arranged between the two installing seats. The design of the two installing seats can cause that the installing height of the luminous tube and the receiving tube to be just suspended in the middle of the cavity. The labyrinth for a smoke-sensing detector with the structure is not easy to be free from influence of the dust; responses to various smoke are basically consistent, and the utility model has the advantages of low cost and stable property.

Description

Smoke sensing detector labyrinth

Affiliated technical field

The utility model belongs to the fire alarm product scope, especially the cigarette sense labyrinth in the smoke-sensitive alarm device.

Background technology

Cigarette sense labyrinth is the core component in the smoke-sensitive alarm device.Whether the light receiving tube that utilizes cigarette that scattering of light is controlled wherein receives the light that luminotron sends.Warning purpose when reaching the generation fire alarm with this.Present various cigarette senses labyrinth because its structural defective causes the defective on some functions, as be subject to the dust influence, inconsistent to the response of various cigarettes, background is high, unstable properties etc.

Summary of the invention

In order to overcome the above deficiency in existing cigarette sense labyrinth, the utility model provides a kind of cigarette sense labyrinth, and this cigarette sense labyrinth is not subject to the dust influence, to the response basically identical of various cigarettes, and low, the stable performance of background.

Cigarette sense of the present utility model labyrinth comprises labyrinth main body and labyrinth lid composition.The labyrinth main body is that a housing surrounds cylindrical cavity.A pair of luminotron and the receiving tube mount pad that is 135 ° of left and right sides angles arranged in the cavity, and the height of mount pad makes luminotron and receiver pope be suspended from the centre position of cavity.One post that is in the light is arranged between two.On the wall of the external chamber of angle some refracting plates of stretching to cavity are arranged.

Cigarette sense of the present utility model labyrinth, because the optical system sensitizing range is suspended from the space, labyrinth, influence drops to minimum to detector with dust; Because its preferred scattering angle is about 45 °, make its response basically identical simultaneously to various cigarettes; This labyrinth structure has been considered various mismachining tolerances in design, and optical property and mismachining tolerance correlativity are little; This structure also makes background very low simultaneously.

Description of drawings: the utility model is further specified below in conjunction with drawings and Examples; Fig. 1 is the front view of the utility model labyrinth main body; Fig. 2 is the profile stretch-out view (for make drawing succinctly omit the projection of frequency modulated light post) of Fig. 1 along the B-B direction; Fig. 3 is the sectional view (for make drawing succinctly omit the projection of luminotron and receiving tube mount pad) of Fig. 1 along the A-A direction; Fig. 4 is the inside surface view of labyrinth lid; Fig. 5 is the profile stretch-out view of Fig. 4 along the C-C direction; Fig. 6 is the outside surface view of labyrinth lid; Fig. 7 is the sectional view under labyrinth main body and the labyrinth lid confined state.1. labyrinth main bodys among the figure; 2. cavity; 3. post is in the light; 4. luminotron mount pad; 5. receiving tube mount pad; 6. refracting plates; 7. the labyrinth is covered; 8. advance the cigarette mesh; 9. luminotron is installed flap; 10. receiving tube is installed flap.

In Fig. 1, on the visible labyrinth main body (1) cylindrical cavity (2) is arranged, there is angle to be luminotron mount pad (4) and receiving tube mount pad (5) about 135 ° in the cavity (2), one post (3) that is in the light is arranged, some refracting plates (6) of symmetry roughly about having on the inwall of the external cavity of the angle of two mount pads (2) between two.Fig. 2 sectional view has mainly reflected the section situation of two peace seats, just in time makes it be suspended from the centre of labyrinth cavity from the setting height(from bottom) of visible luminotron of this sectional view and receiving tube; Fig. 3 sectional view has mainly reflected the side-looking form of be in the light post and refracting plates.

As can be seen from Fig. 4: on the labyrinth lid (7) into cigarette mesh (8) is arranged, have luminotron that flap (9) and receiving tube installation flap (10) are installed with corresponding position in the main body of labyrinth.Fig. 5 sectional view system is dissectd along two flap axis, has reflected the profile morphology of labyrinth lid integral body and two flaps.Fig. 6 has reflected the form of labyrinth exterior surface.

Fig. 7 has reflected the state after labyrinth main body and the labyrinth lid assembling, and its profile direction is consistent with Fig. 2, and as seen from the figure, fit fully with its two flap (9), (10) in two mount pads (4), (5), constitute whole.

Claims

1. smoke sensing detector labyrinth, be made up of labyrinth main body and labyrinth lid, the labyrinth main body has a cylindrical cavity, has luminotron mount pad and receiving tube mount pad and refracting plates some in the cavity, the horizontal projection that it is characterized in that two mount pads is in a certain angle, and the post that is in the light is arranged between two mount pads.

2. one kind as the said smoke sensing detector labyrinth of claim 1, it is characterized in that the angle between said two mount pads is about 135 °.

3. one kind as the said smoke sensing detector labyrinth of claim 1, and the height that it is characterized in that installing in two mount pads position of luminotron and receiving tube is positioned at the centre of cavity height.

4. one kind as claim 2 or 3 described smoke sensing detector labyrinths, it is characterized in that said labyrinth has covered netted smoke intaking hole, and there is corresponding installation flap the position corresponding with two mount pads in the main body of labyrinth.