CN2469508Y

CN2469508Y - Photoelectric smoke sensing detector

Info

Publication number: CN2469508Y
Application number: CN 01218585
Authority: CN
Inventors: 张建华
Original assignee: GUOTAI YI'AN ELECTRICITY CO Ltd BEIJING
Current assignee: GUOTAI YI'AN ELECTRICITY CO Ltd BEIJING
Priority date: 2001-03-30
Filing date: 2001-03-30
Publication date: 2002-01-02
Anticipated expiration: 2011-03-30

Abstract

The utility model relates to a fire call photoelectric smoke detector, which is mainly composed of a seat plate, an elastic clamping claw, an infrared launching tube, a receiving tube and an optical darkroom composed of a closing circle and a detecting bottom cover, and relative circuits, wherein the detecting bottom cover is of coniform shape, and bristles with a plurality of reticulate holes. Moreover, the external surface of the detecting bottom cover is arranged with six ribbings, and the internal surface of the detecting bottom cover is arranged with a plurality of diagonal ribbings. The fume particles can enter the optical darkroom vertically through the reticulate holes on the detecting bottom cover, and produce diffuse reflection, trigger the relative circuits into operation, and then send out an alarm, and thereby reduce the time from fire occurrence to alarm signal sending out, and reduces the property loss.

Description

Optical detector of fire smoke

The utility model relates to a kind of fire alarm installation, more particularly, relates to a kind of optical detector of fire smoke that is used for fire alarm, and this detector comes work according to the measuring principle that diffuses.

Optical detector of fire smoke is the early fire alarming device of a kind of radiationless pollution and stable performance, its advantage mainly be for those burn at a slow speed, the livings cigarette of naked light burning and fluent meterial burns and all has the reaction that is exceedingly fast.Therefore this detector is widely used in places such as hotel, restaurant, office, factory, makes the people's lives and property be able to safety guarantee.

The cardinal principle of optical detector of fire smoke is in smog enters into optical dark room the time, utilizes smog that the infrared ray that infrared emission tube sends is carried out diffuse reflection, makes infrared ray be received pipe and receives, thereby send alerting signal by the interlock circuit effect.

As depicted in figs. 1 and 2, existing optical detector of fire smoke is made up of a circular bottom plate 4, a coaming plate 5, an elastic card claw 1, an infrared emission tube 2, a receiving tube 3 and interlock circuit.Wherein, infrared emission tube 2 and receiving tube 3 are arranged in the elastic card claw 1 with certain angle of inclination, make the infrared ray that sends in the infrared emission tube 2 can not directly enter into receiving tube 3, therefore under normal circumstances interlock circuit can not worked and output alarm signal.

Coaming plate 5 is formed by a base plate 6 with around a plurality of anti-dazzling screens 7 of this base plate 6, by anti-dazzling screen 7 extraneous light can't be entered in the chamber 8 that is made of base plate 6 and a plurality of anti-dazzling screen 7, and extraneous smoke particle can enter in this chamber 8 from the slit of anti-dazzling screen 7.

When breaking out of fire, the smog that burning produces up rises after the effect of keeping out on roof enters in the described chamber 8 from the slit of anti-dazzling screen 7, the infrared ray that infrared emission tube 2 is sent carries out diffuse reflection, infrared ray is entered in the receiving tube 3, excite interlock circuit to carry out work, output alarm signal by receiving tube 3 again.

But above-mentioned optical detector of fire smoke has the following disadvantages:

1. be provided with certain angle of inclination because of infrared emission tube 2 and receiving tube 3, thereby significantly reduced the reflector space of smog, and then reduced the sensitivity of this optical detector of fire smoke.

2. returning Shi Caineng after smog up rises enters in the optical detector of fire smoke, thereby the time that smog enters in the optical detector of fire smoke is longer, thereby make longlyer to the time of sending alerting signal, and then enlarged the loss of people's properties from the condition of a fire occurring.

Since the optical detector of fire smoke long term exposure in air, and airborne dust will enter into by the slit at anti-dazzling screen 7 places in the chamber 8, accumulating over a long period will be on the inwall of chamber 8, especially on base plate 6, can deposit one deck ash, thereby make that the bias light in the chamber 8 is stronger, so not only can have influence on the sensitivity of receiving tube 3, optical detector of fire smoke was lost efficacy.Therefore people have to just detector be cleaned at set intervals, thereby make troubles to the user.

The purpose of this utility model is to provide a kind of reflector space that increases smoke particle, thereby improves the optical detector of fire smoke of its sensitivity.

Another purpose of the present utility model is to provide a kind of smoke particle that shortens to enter into the interior time of optical detector of fire smoke, sends the optical detector of fire smoke of alerting signal time thereby shorten.

Another purpose of the present utility model is to provide a kind of optical detector of fire smoke that can anti-dust disturbs.

To achieve these goals, the optical detector of fire smoke in the utility model mainly contains a base plate, an elastic card claw, an optical dark room, an infrared emission tube, a receiving tube and interlock circuit composition.Be provided with an elastic card claw on the base plate in optical dark room, infrared emission tube and receiving tube in elastic card claw, have been horizontally disposed with, simultaneously the inner bottom part at optical dark room is provided with shading column, and this shading column is used to block from infrared emission tube and sends and can directly be injected into infrared ray in the receiving tube.Simultaneously, interlock circuit adopts present commercially available matured product.

Wherein, described optical dark room is surveyed bottom by a closed circle and and is combined, and wherein is provided with to be the anti-dazzling screen that axis is symmetrically distributed on the inwall of closed circle, can not directly enter in the receiving tube from the infrared ray that infrared emission tube sends guaranteeing; On described detection bottom, be covered with netted aperture, and the surface is provided with the diagonal bar of many differing heights within it.This diagonal bar has prevented the influence to optical dark room of extraneous light and dust effectively, simultaneously, the smog that is produced by fire can directly enter in the optical dark room from this netted aperture, thereby has shortened from producing smog sends alerting signal to optical detector of fire smoke time.

In addition, described detection bottom preferably is a taper shape, can make the dust that enters from netted aperture be accumulated in the bottommost of surveying bottom like this, to weaken the bias light in the optical dark room, and then guarantee that further optical dark room is interior without any light, simultaneously, also significantly reduced wash number.

In addition, can be provided with a particle collector, fall in the particle collector because of deadweight so that enter the interior dust of optical detector of fire smoke, so that clean at the bottom position of described detection bottom.

In addition, can be provided with the some rule muscle that extend outward from the center at the outside surface of described detection bottom, so that can make smoke particle more effective, more successfully enter in the zone of telling by the bar muscle, smoke particle is entered in the optical dark room by netted aperture, and this muscle has also strengthened surveying the external force resistance impact strength of bottom simultaneously.

In addition, described shading column is preferably herringbone, sends and directly inject infrared ray in the receiving tube thereby can block effectively from infrared emission tube, thereby guarantees the accuracy of optical detector of fire smoke.

In addition, also can add a shell that has a grid, to increase the overall aesthetics of optical detector of fire smoke in the outside of described detector.

Optical detector of fire smoke in the utility model has changed the position that is provided with of existing optical detector of fire smoke middle infrared (Mid-IR) power valve and receiving tube, thereby has increased the zone of smoke detection.Simultaneously, optical detector of fire smoke in the utility model optical detector of fire smoke in the past utilizes the slit of anti-dazzling screen to make smoke particle enter into mode in the optical dark room from horizontal direction, being improved to directly vertically enters in the optical dark room by surveying bottom, therefore, the spy of the photoelectric smoke in the utility model device has shortened greatly from the time that the condition of a fire to optical detector of fire smoke sends alerting signal occurring.

Be described in further detail below in conjunction with the specific embodiment of accompanying drawing optical detector of fire smoke in the utility model.

Fig. 1 is the cross-sectional schematic of existing optical detector of fire smoke;

Fig. 2 is along A-A line cross-sectional schematic among Fig. 1;

Fig. 3 is the cross-sectional schematic of optical detector of fire smoke in the utility model;

Fig. 4 is along B-B line cross-sectional schematic among Fig. 3;

Fig. 5 is the vertical view of optical dark room lid in the utility model;

Fig. 6 is along the cross-sectional schematic of C-C line among Fig. 5.

As shown in Figure 3 and Figure 4, the optical detector of fire smoke in the utility model mainly includes a base plate 25, a closed circle 24, an infrared emission tube 2, bottom 26 surveyed by a receiving tube 3, one and interlock circuit is formed.Wherein one-body molded on base plate 25 have a cyclic spring claw 23, infrared emission tube 2 and receiving tube 3 in this elastic card claw 23, have been horizontally disposed with, below this elastic card claw 23, be provided with a closed circle 24, this closed circle 24 within it wall be provided be in axisymmetric anti-dazzling screen 20.Simultaneously, be covered with one and survey bottom 26 below this closed circle 24, this detection bottom 26 directly is connected with base plate 25, thereby forms an optical dark room 27.

As shown in Figure 5 and Figure 6, survey bottom 26 and be a taper shape, be provided with a particle collector 21 in its bottom centre, be provided with six bar muscle 16 that extend outward from the center on its outer surface, the surface is provided with the diagonal bar 19 of many differing heights within it, and between many diagonal bars 19, being covered with netted aperture 28, the certain position place between relative infrared emission tube 2 and receiving tube 3 is provided with a herringbone shading column 29 at last.

Optical detector of fire smoke in the utility model in use, at first infrared emission tube 2 and receiving tube 3 are arranged in the elastic card claw 23, and be connected with certain interlock circuit, to survey bottom 26 after then being arranged on closed circle 24 on the elastic card claw 23 and be arranged on the base plate 25, thereby constitute an optical detector of fire smoke with certain position.When room finish, this photoelectric smoke device is connected with extraneous circuit again, and base plate 25 directly is located on the ceiling gets final product.

When breaking out of fire, the smog that burning is sent up rises, and directly from the netted aperture 28 of surveying bottom 26, enter in the optical dark room 27, carry out diffuse reflection by the infrared ray that infrared emission tube 2 is sent, the infrared ray that feasible script can't enter receiving tube 3 enters in the receiving tube 3, excites interlock circuit to send alerting signal by receiving tube 3 again.Thereby shorten from the condition of a fire taking place, and then reduce the loss of people's property to the time that optical detector of fire smoke sends alerting signal.

Claims

1. optical detector of fire smoke, mainly containing a base plate, an elastic card claw, an optical dark room, an infrared emission tube, a receiving tube and interlock circuit forms, wherein elastic card claw is located on the surface of base plate, infrared emission tube and receiving tube all are located in the elastic card claw, and optical dark room is fixed on the base plate, it is characterized in that: described infrared emission tube and receiving tube are horizontally set in the elastic card claw, and being provided with a shading column at the inner bottom part of optical dark room, this shading column is used to block from infrared emission tube and sends and can directly inject infrared ray in the receiving tube.

2. according to the detector described in the claim 1, it is characterized in that: described optical dark room is surveyed bottom by a closed circle and and is combined, and wherein is provided with to be the anti-dazzling screen that axis is symmetrically distributed on the inwall of closed circle; On described detection bottom, be covered with netted aperture, and the surface is provided with the diagonal bar of many differing heights within it.

3. according to the detector described in the claim 2, it is characterized in that: described detection bottom is a taper shape.

4. according to the detector described in the claim 3, it is characterized in that: described detection bottom is provided with a soot collector at its positive center.

5. according to the detector described in the claim 2, it is characterized in that: described detection bottom is provided with the some rule muscle that extend outward from the center at its outside surface.

6. according to the detector described in the claim 1, it is characterized in that: described shading column is a herringbone.

7. according to the detector described in the claim 1, it is characterized in that: described elastic card claw and described base plate are one-body molded.

8. according to the detector described in the claim 1, it is characterized in that: outside described detector, be provided with a shell that has a grid.