CN2072706U

CN2072706U - Photoelectric sounder for smoke and fire

Info

Publication number: CN2072706U
Application number: CN 90214631
Authority: CN
Inventors: 王际锦
Original assignee: SHENGHUA ELECTRONIC TECHNOLOGY DEVELOPING CO NANJING CITY
Current assignee: SHENGHUA ELECTRONIC TECHNOLOGY DEVELOPING CO NANJING CITY
Priority date: 1990-10-16
Filing date: 1990-10-16
Publication date: 1991-03-06

Abstract

The utility model discloses a photoelectric sounder for smoke and fire which is composed of a photoelectric cigarette case and a photoelectric control circuit. The photoelectric cigarette case is composed of an upper thin circular plate, a lower thin circular plate, the window pin of the thin circular plates and light chambers. The inside of the two light chambers is respectively provided with a silicon luminous diode and a silicon light-sensitive receiving diode, and the upper thin circular plate and the lower thin circular plate are mutually sheathed into integration to compose the photoelectric cigarette case of the utility model. A 'omega'-shaped concave groove, a large and a small 'X'-shaped window pins and a large and a small T'-shaped window pins are mutually intercrossed to compose the protection from light smoke inlet passageway of the photoelectric cigarette case. The utility model has the advantages of novel structure, reasonability, small volume, high operational reliability, strong anti-interference ability and no false alarm.

Description

Photoelectric sounder for smoke and fire

The utility model relates to a kind of fire detector, particularly a kind of smoke fire detector.

Existing ionic smoke sensor formula fire detector is according to the principle design of ionization, and its sensor is with isotope americium A ²¹ _m, have alpha activity, and when using, easily cause wrong report in the humid area.

The purpose of this utility model is exactly in order to overcome the problems referred to above, and a kind of photoelectric smoke formula fire detector is provided.

The utility model is made up of photoelectric smoke box and photoelectric control circuit thereof, be characterized in that the photoelectric smoke box is by last, thin plectane and window bolt thereof and light chamber are formed down, intrinsic two " Ω " type grooves on last thin plectane bottom edge surface, this groove has certain height and vertical with last thin plectane bottom surface, interior angle α between two " Ω " type groove normal is 73 °-80 °, the best is 77 °, intrinsic two little T-shape window bolts on the edge surface of going up thin plectane bottom surface middle within two " Ω " type groove, intrinsic one big " ten " word type window catch between them, the height of two little T-shape window bolts and big " ten " word type window catch all height with " Ω " type groove is identical, and two horizontal minor faces of little T-shape window bolt hide adjacent big " ten " word type window catch and the horizontal minor face of " Ω " type groove respectively, even intrinsic six T-shape window bolts on the edge surface of going up thin plectane bottom surface middle outside two " Ω " type groove, and all intrinsic " ten " word type window catch between the T-shape window bolt in twos, also all the height with " Ω " type groove is identical for the height of T-shape window bolt and " ten " word type window catch, two horizontal minor faces of each T-shape window bolt hide the horizontal minor face of adjacent " ten " word type window catch respectively, going up thin plectane and window bolt thereof is working of plastics, thin plectane and light chamber thereof are metal material down, the light chamber that intrinsic two metal shells of thin plectane upper surface constitute under the metal, the height of " Ω " type groove on the height of two smooth chambers and the last thin plectane is identical, the indoor silicon LED that is provided with of one of them light is the dispatcher's office, the indoor silicon photodiode that is provided with of another light is a receiving chamber, the front surface of two smooth chambers is the inclined-plane, its center position that approaches plectane downwards respectively has a hole, angle β between the line at two holes and following thin plectane center also is 73 °-80 °, the best is 77 °, upward thin plectane covers and approaches on the plectane under metal, two " Ω " type grooves going up thin plectane bottom surface are stay two metal shell light chambers of thin plectane upper surface of upper shield just in time, on, thin plectane is combined as a whole down, constitutes photoelectric smoke box of the present utility model.

Photoelectric control circuit of the present utility model is made up of regulator rectifier circuit, oscillatory circuit, optical dark room, voltage amplifier circuit, voltage comparator circuit, delay circuit, affirmation circuit and alarm indication circuit, below in conjunction with description of drawings.

Fig. 1, the 2nd, the utility model photoelectric smoke box structural representation,

Fig. 3 is the utility model photoelectric control circuit theory diagram.

As Fig. 1,2, thin plectane 1 covers and approaches on the plectane 2 under metal on the plastics, two " Ω " type grooves 3 going up thin plectane 1 bottom surface just in time overlap two metal shell light chambers 4 of blocking down thin plectane 2 upper surfaces, they constitute one, and be assemblied in together with the photoelectric control circuit plate in the shell of the utility model detector, go up two little T-shape window bolts 5 and " Ω " type groove 3 on thin plectane 1 bottom surface, big " ten " word type window catch 6 and six T-shape window bolts 7 and five " ten " word type window catch 8 constitute the fume inlet passage of the utility model photoelectric smoke boxes, each window bolt of this fume inlet passage intersects mutually, can avoid light directly to inject, the cigarette that fire is emerged then can enter the photoelectric smoke box by fume inlet passage.

The course of work such as Fig. 3, rectification, the nonpolarity voltage transitions that mu balanced circuit will be imported supplies each circuit working after becoming to have polarity DC voltage and voltage stabilizing, oscillatory circuit produces about 3 seconds narrow pulse signal of cycle, send a branch of pulsating through amplifying rear drive infrasil light emitting diode, the photosensitive reception diode of infrasil light emitting diode and silicon is all at optical dark room, promptly in Fig. 1 in the metal light chamber 4 of photoelectric smoke box, a branch of fluctuating light beam of the infrasil light emitting diode emission of optical dark room is launched from the aperture on the 4 preceding skewed surfaces of light chamber, after the smog scattering, aperture from another light chamber 4 preceding skewed surfaces is received by the silicon photodiode, and the silicon photodiode can't accept the emission beam signal under the normal condition, when fire takes place, smog enters the photoelectric smoke box, it is optical dark room, by infrasil light emitting diode emitted light beams in the smoke particle surface scattering, received by the silicon photodiode, the signal that receives amplifies through voltage amplifier circuit, handle, again relatively through voltage comparator, send delay circuit time-delay 10 seconds then, report by mistake to avoid the contingent breaking out of fire, send at last and confirm that circuit sends the alarm current signal to the alarm indication circuit, send sound and light alarm, people can put out a fire immediately.

The utility model novel structure, reasonable, circuit is simple, and volume is little, and is "dead", can not report by mistake, the functional reliability height, strong anti-interference performance can be installed in the room that need guard fire during use, cabin, places such as machine room, supporting fire alarm control unit are installed in the people guard room or duty room on duty, can reliably report to the police to fire.

Claims

1, a kind of photoelectric smoke detector, it is made up of photoelectric smoke box and photoelectric control circuit thereof, it is characterized in that the photoelectric smoke box is by last, following thin plectane 1,2 and window bolt and light chamber form, intrinsic two " Ω " type grooves 3 on last thin plectane 1 bottom edge surface, this groove has certain height and vertical with last thin plectane 1 bottom surface, interior angle α between two " Ω " type groove, 3 normals is 73 °-80 °, intrinsic two little T-shape window bolts 5 on the edge surface of going up thin plectane 1 bottom surface middle within two " Ω " type groove 3, intrinsic one big " ten " word type window catch 6 between them, and two horizontal minor faces of little T-shape window bolt 5 hide the horizontal minor face of adjacent big " ten " word type window catch 6 and " Ω " type groove 3 respectively, even intrinsic six T-shape window bolts 7 on the edge surface of going up thin plectane 1 bottom surface middle outside two " Ω " type groove 3, and all intrinsic " ten " word type window catch 8 between the T-shape window bolt 7 in twos, two horizontal minor faces of each T-shape window bolt 7 hide adjacent 8 liang of horizontal minor faces of " ten " word type window catch respectively, all the height with " Ω " type groove 3 is identical for the height of two little T-shape window bolts 5 and big " ten " word window bolt 6 and six T-shape window bolts 7 and five " ten " word type window catch 8, the light chamber 4 that intrinsic two metal shells of thin plectane 2 upper surfaces constitute under the metal, the height of " Ω " type groove 3 on the height of two smooth chambers 4 and the last thin plectane 1 is identical, be provided with silicon LED in one of them light chamber 4, be provided with the silicon photodiode in another light chamber 4, the front surface of two smooth chambers 4 is the inclined-plane, its center position that approaches plectane 2 downwards respectively has a hole, angle β between the line at two holes and following thin plectane 2 centers also is 73 °-80 °, upward thin plectane 1 covers and approaches on the plectane 2 under metal, two " Ω " type grooves 3 going up thin plectane 1 bottom surface are stay two metal shell light chambers 4 of thin plectane 2 upper surfaces of upper shield just in time, on, following thin plectane 1,2 are combined as a whole.

2, by the described photoelectric smoke detector of claim 1, it is characterized in that between two " Ω " type groove normal of thin plectane 1 bottom surface interior angle α and down before two metal shell light of the thin plectane 2 upper surfaces chamber 4 on the skewed surfaces angle β the best between the line at two holes and following thin plectane 2 centers be 77 °.