CN2800269Y - Photoelectric smog detection room - Google Patents
Photoelectric smog detection room Download PDFInfo
- Publication number
- CN2800269Y CN2800269Y CN 200520024246 CN200520024246U CN2800269Y CN 2800269 Y CN2800269 Y CN 2800269Y CN 200520024246 CN200520024246 CN 200520024246 CN 200520024246 U CN200520024246 U CN 200520024246U CN 2800269 Y CN2800269 Y CN 2800269Y
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- labyrinth seat
- lamp house
- loam cake
- labyrinth
- receiving tube
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Abstract
A photoelectric smog detection room belongs to the technical field of monitoring and control. The utility model provides a photoelectric smog detection room which has the advantages of small size, simple structure, high sensitivity and reliable operation. The utility model has a technical scheme that the utility model is composed of an upper cover and a labyrinth seat, wherein the upper cover is a cylindrical ring cover which is composed of a top surface and two layers of cylindrical side walls, air inlets are evenly distributed on the outer side wall, an air inlet channel is arranged between the two layers of the side walls, and zigzag ripples are respectively arranged on the inner surface of the inner side wall and the inner surface of the top surface of the ring cover; the labyrinth seat is a cylindrical shell which is provided with an opening at the upper end surface and a sealing at the lower bottom surface, the outer diameter of the cylindrical outer side wall of the upper cover is identical with the outer diameter of the cylindrical shell of the labyrinth seat and a hollow chamber is combined by connecting devices. A transmitting tube lamphouse and a light receiving tube lamphouse are respectively positioned at the lower part of the lower bottom face of the labyrinth seat, openings of two lamphouses are communicated with the chamber of the labyrinth seat and an included angle of the projection of optical axes of the transmitting tube lamphouse and the receiving tube lamphouse on the horizontal plane is 120 DEG to 130 DEG.
Description
Technical field
The utility model relates to a kind of detecting chamber of photoelectric smoke detector, belongs to the Monitoring and Controlling technical field.
Background technology
It mainly is three types in ion, photoelectricity, temperature-sensitive that fire alarm system adopts detector (probe).In early days widely used is the ion-type detector, the radioactive half-life of the radioactive isotope (americium-241) that it adopts is extremely long, can be used as the stable radioactive source that makes air ionization, this detector is stable, reliable, but complex structure, cost are higher, and involve radioactivity and make people that environmental protection misgivings be arranged, thereby existing adopter gradually reduces.At present maximum is photo-electric type smoke detector, and this detector is simpler with respect to the ion-type probe, environmental protection, cost are low.Its detection method mainly contains " forward direction " and " back to " two types; So-called " forward direction " and " back to " be emission light as orientation, flue dust scattered light direction is called " forward direction " in the same way with emission light, and is decided to be " after to " towards light source one side.Be meant that with the work of " back scattering " mode the emission rayed directly reflects to light source direction after the particulate of flue dust, with this reflected light light as received signal, receive the measuring position and be 90 ° with interior scope with emission light, the angle of employing has 40 °, 70 ° two kinds.With the work of " forward scattering " mode is that receiving trap detects the emission rayed and is created in scattering greater than 90 ° of directions at flue dust, and commonly used have 135 ° of angles.In above-mentioned two kinds of detection methods, adopt various forms darkroom structure to obtain different measurement performances, mainly contain venetian blind type labyrinth, cone-shaped body formula, refraction type labyrinth or the like.
Common photoelectric smoke type detector is made up of detecting chamber, infrared emission tube (hereinafter to be referred as power valve), infrared receiver tube (hereinafter to be referred as receiving tube) and opto-electronic conversion components and parts etc., and detecting chamber is the main member in the detector.Be provided with the lamp house that generator tube and receiving tube are installed in the detecting chamber, the chamber perisporium is spaced by the labyrinth shape blade and forms.The planform of this detecting chamber is complicated, needs to obtain by special mould of making and processing and forming, causes production cost to raise.Chinese patent 03204782.7 and 03204783.5 discloses " the end face air admission type detecting chamber that is used for fire detector ", " a kind of improved end face air admission type detecting chamber " two kinds of detecting chambers respectively, and common photoelectric smoke type detector is improved.Through use finding that they still come with some shortcomings, the former still is provided with blade on locular wall, and complex structure, manufacture difficulty are big; The latter has adopted vaneless conical detecting chamber design, but its lamp house above detecting chamber, so background values is higher, is unfavorable for improving the induction sensitivity of detector.Above-mentioned in addition two kinds of detecting chambers have all been installed the focus type convex lens in receiving tube, also increased the complicacy of structure.
Summary of the invention
Technical problem to be solved in the utility model provides that a kind of volume is little, simple in structure, induction sensitivity is high, the photoelectric mist detecting chamber of reliable operation.
The technical scheme that solves the problems of the technologies described above is:
A kind of photoelectric mist detecting chamber, it comprises the power valve lamp house, the receiving tube lamp house, its improvements are, it is made up of loam cake and labyrinth seat two parts, loam cake is the cylindrical shape dome, form by end face and cylindrical shape lateral wall, the labyrinth seat is the upper surface opening, the cylindrical shell of bottom surface sealing, the external diameter of the cylindrical shape lateral wall of loam cake is identical with the external diameter of the cylindrical shell of labyrinth seat, be combined into the chamber of hollow by interface unit, be evenly distributed with air inlet on the cylindrical shape lateral wall of loam cake, power valve lamp house and receiving tube lamp house lay respectively at the below of labyrinth seat bottom surface, the opening of two lamp houses is connected with the chamber of labyrinth seat by the bottom surface of labyrinth seat, and the optical axis of power valve lamp house and receiving tube lamp house is 120 °-130 ° at the angle of the projection of surface level.
Above-mentioned photoelectric mist detecting chamber, also has a circle annular madial wall in the described loam cake, it between the lateral wall of this madial wall and loam cake air intake passage, on the inside surface of this madial wall and on the end face inside surface of dome the serrate ripple is arranged, along the hole that is located by connecting that is distributed with on the circumferential edges of dome end face more than 2.
Above-mentioned photoelectric mist detecting chamber has a plurality of inwardly protruded studs on the inner walls of described labyrinth seat, evenly distribute along the inwall circumference, also has a plurality of register pins straight up in the chamber of labyrinth seat, and its position is corresponding with the hole that is located by connecting of loam cake respectively.
Above-mentioned photoelectric mist detecting chamber, described power valve lamp house that is positioned at labyrinth seat bottom surface below and receiving tube lamp house tilt to be communicated with respectively with chamber on the seat bottom surface of labyrinth, the optical axis of two lamp houses and bottom surface are 22.5 ° of angles respectively, belong to the forward scattering working method.
Above-mentioned photoelectric mist detecting chamber, there is barricade at the connection opening place of described power valve lamp house and receiving tube lamp house and labyrinth seat bottom surface.
Above-mentioned photoelectric mist detecting chamber has stainless steel cloth at the air inlet place of loam cake, and a plurality of installation legs are arranged in the bottom of labyrinth seat.
This photoelectric mist detecting chamber is the refraction type labyrinth structure, the lamp house design of power valve and receiving tube reaches chamber and adopts serrate inside surface and barricade to help reducing background under the bottom surface, improve induction sensitivity, the optical axis of power valve lamp house and receiving tube lamp house is 120 °-130 ° at the angle of the projection of surface level, be that to adopt the real space angle between the lamp house of power valve and receiving tube be that 110 ° of angles are arranged, thereby often jamming-proof dividing plate need be set in the middle of when no longer needing to be arranged in parallel lamp house as the chassis, make detecting chamber compacter, small and exquisite like this.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Fig. 2 is the side view of loam cake of the present utility model;
Fig. 3 is the cut-open view of Fig. 2;
Fig. 4 is the upward view of Fig. 2;
Fig. 5 is a labyrinth of the present utility model seat side view;
Fig. 6 is the vertical view of Fig. 5;
Mark is as follows among the figure: power valve lamp house 1, receiving tube lamp house 2, loam cake 3, labyrinth seat 4, end face 5, bottom surface 6, lateral wall 7, air inlet 8, madial wall 9, air intake passage 10, serrate ripple 11, the hole 12 that is located by connecting, stud 13, register pin 14, barricade 15, leg 16
Embodiment
In general photoelectric smoke type detector, detecting chamber is one of main member in the detector.Detecting chamber is a ventilative lighttight darkroom, the indoor lamp house that power valve and receiving tube are installed that is provided with.Smog is entered in the detecting chamber by air inlet, and the infrared light that power valve sends produces irregular scattering light when shining in the smog tiny dust granules, and receiving tube converts the reflected light that receives to electric signal and amplifies output.Can not definitely eliminate reflected light owing to have in the air in dust and the detecting chamber, so receiving tube still can be sensed faint scattered light and export a fixing electric signal under the normal condition, this fixed telecommunication number is called as background.When the scattered light of receiving tube induction surpassed background and reaches certain numerical value, detector gave the alarm.Obviously, background is low more helps improving the detector induction sensitivity more.The structural design of the size of background and induction sensitivity and detecting chamber, as emission, receive the installation site of lamp house, decontamination chamber perisporium reflected light preferably, chamber size etc. all has relation.
In the utility model, detecting chamber adopts the refraction type labyrinth structure, and it is made up of loam cake 3 and labyrinth seat 4 two parts.
Fig. 2,3,4 shows that loam cake 3 is the cylindrical shape dome, is made up of end face 5 and two-layer cylinder side wall.The lateral wall 7 of outer ring is connected with the outer wall of labyrinth seat 4, is evenly distributed with air inlet 8 on the lateral wall 7, is air intake passage 10 between the madial wall 9 of inner ring and the lateral wall 7.On the inside surface of madial wall 9 and on end face 5 inside surfaces of dome serrate ripple 11 is being arranged, its effect is that the reflection of emission light is reduced, thereby reduces background.Along being distributed with 2 holes 12 that are located by connecting on the circumferential edges of dome end face 5, be connected with labyrinth seat 4 by register pin 14.
Fig. 5,6 shows, labyrinth seat 4 is the cylindrical shell of upper surface opening, bottom surface 6 sealings, the cylinder side wall 7 of it and loam cake 3 is formed the chamber of hollows, a plurality of inwardly protruded studs 13 are arranged on the inner walls of labyrinth seat 4, evenly distribute along the inwall circumference, the position of the register pin 14 in the chamber of labyrinth seat 4 is corresponding with the hole 12 that is located by connecting of loam cake 3 respectively.
Can see from Fig. 1,5,6, power valve lamp house 1 of the present utility model and receiving tube lamp house 2 lay respectively at the below of labyrinth seat 4 bottom surfaces 6, according to forward scattering working method layout, the optical axis of power valve lamp house 1 and receiving tube lamp house 2 is 125 ± 5 ° at the angle of the projection of surface level, present embodiment is 125 °, and the real space angle is 110 °.Often jamming-proof dividing plate need be set in the middle of when this layout no longer needs to be arranged in parallel lamp house as the chassis, make detecting chamber compacter, small and exquisite.Power valve lamp house 1 and receiving tube lamp house 2 tilt to be communicated with respectively with labyrinth seat bottom surface 6, the optical axis of two lamp houses and bottom surface 6 are 22.5 ° of angles respectively, there is barricade 15 at connection opening place at power valve lamp house 1 and receiving tube lamp house 2 and labyrinth seat bottom surface 6, purpose be reduce since the light direct projection to go into the background that causes in the darkroom too high.Luminotron of the present utility model adopts common φ 5 luminotrons.
Fig. 1 shows, the utility model in use, flue gas enters from the air inlet 8 of loam cake 3, by 6 on labyrinth seat 4 inwalls vertical stud 13 guiding, flow to perform region, bottom, labyrinth by air intake passage 10 downwards, be launched light-struck flue dust generation scattering, scattered light is received pipe collection becoming electric signal, the generation of detection of fires.
In addition, be injected with stainless steel cloth,, destroy operate as normal in case foreign matter enters at air inlet 8 places of loam cake 3.The bottom of labyrinth seat 4 has 3 leg 16 is installed, and is used for installing in the circuit board, makes certain altitude between labyrinth seat and the wiring board, overcome the shortcoming of lamp house busy line plate, wiring board can be done forr a short time, has effectively lowered cost, arranges that the big electric capacity of paster also has enough spaces.
Claims (6)
1. photoelectric mist detecting chamber, it comprises power valve lamp house [1], receiving tube lamp house [2], it is characterized in that: it is made up of loam cake [3] and labyrinth seat [4] two parts, loam cake [3] is the cylindrical shape dome, form by end face [5] and cylindrical shape lateral wall [7], labyrinth seat [4] is the upper surface opening, the cylindrical shell of bottom surface [6] sealing, the external diameter of the cylindrical shape lateral wall [7] of loam cake [3] is identical with the external diameter of the cylindrical shell of labyrinth seat [4], be combined into the chamber of hollow by interface unit, be evenly distributed with air inlet [8] on the cylindrical shape lateral wall [7] of loam cake [3], power valve lamp house [1] and receiving tube lamp house [2] lay respectively at the below of labyrinth seat bottom surface [6], the opening of two lamp houses is connected by the chamber of labyrinth seat bottom surface [6] with labyrinth seat [4], and the optical axis of power valve lamp house [1] and receiving tube lamp house [2] is 120 °-130 ° at the angle of the projection of surface level.
2. photoelectric mist detecting chamber according to claim 1, it is characterized in that: also have a circle annular madial wall [9] in the described loam cake [3], be air intake passage [10] between the lateral wall [7] of this madial wall [9] and loam cake [3], on the inside surface of this madial wall [9] and on end face [5] inside surface of dome serrate ripple [11] is arranged, along the hole that is located by connecting [12] that is distributed with on the circumferential edges of dome end face [5] more than 2.
3. photoelectric mist detecting chamber according to claim 2, it is characterized in that on the inner walls of described labyrinth seat [4] a plurality of inwardly protruded studs [13] being arranged, evenly distribute along the inwall circumference, a plurality of register pins [14] are straight up arranged in the chamber of labyrinth seat, and its position is corresponding with the hole that is located by connecting [12] of loam cake [3] respectively.
4. photoelectric mist detecting chamber according to claim 3, it is characterized in that: described power valve lamp house [1] that is positioned at labyrinth seat bottom surface [6] below and receiving tube lamp house [2] tilt to be communicated with respectively with chamber on the labyrinth seat bottom surface [6], and the optical axis of two lamp houses and bottom surface [6] are 22.5 ° of angles respectively.
5. photoelectric mist detecting chamber according to claim 4 is characterized in that: described power valve lamp house [1] and receiving tube lamp house [2] have barricade [15] with the connection opening place of labyrinth seat bottom surface [6].
6. photoelectric mist detecting chamber according to claim 5 is characterized in that: the air inlet [8] in loam cake [3] has been located stainless steel cloth, in the bottom of labyrinth seat [4] a plurality of installation legs [16] is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520024246 CN2800269Y (en) | 2005-06-10 | 2005-06-10 | Photoelectric smog detection room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520024246 CN2800269Y (en) | 2005-06-10 | 2005-06-10 | Photoelectric smog detection room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2800269Y true CN2800269Y (en) | 2006-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520024246 Expired - Fee Related CN2800269Y (en) | 2005-06-10 | 2005-06-10 | Photoelectric smog detection room |
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| CN (1) | CN2800269Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104574773A (en) * | 2013-10-23 | 2015-04-29 | 海湾安全技术有限公司 | Smoke detector |
| CN107067634A (en) * | 2017-03-13 | 2017-08-18 | 英吉森安全消防系统（上海）有限公司 | One kind is without labyrinth smoke detection light room structure |
| CN107516396A (en) * | 2017-09-05 | 2017-12-26 | 深圳市泰和安科技有限公司 | A kind of two-way photoelectric smoke sensor |
| CN110168322A (en) * | 2016-09-26 | 2019-08-23 | 李炳权 | Photoelectric smoke detector with double next door darkroom structures |
| CN110443972A (en) * | 2019-09-12 | 2019-11-12 | 深圳市泛海三江电子股份有限公司 | Labyrinth structure of smoke alarm and labyrinth background value control method |
| CN110459033A (en) * | 2019-09-12 | 2019-11-15 | 深圳市泛海三江电子股份有限公司 | Dual-wavelength dual-light-path smoke detection labyrinth and method |
| CN111199628A (en) * | 2018-11-20 | 2020-05-26 | 海湾安全技术有限公司 | Smoke detector |
| CN113327397A (en) * | 2021-05-20 | 2021-08-31 | 浙江华消科技有限公司 | Smoke detector labyrinth structure and smoke alarm |
-
2005
- 2005-06-10 CN CN 200520024246 patent/CN2800269Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104574773A (en) * | 2013-10-23 | 2015-04-29 | 海湾安全技术有限公司 | Smoke detector |
| CN110168322A (en) * | 2016-09-26 | 2019-08-23 | 李炳权 | Photoelectric smoke detector with double next door darkroom structures |
| CN107067634A (en) * | 2017-03-13 | 2017-08-18 | 英吉森安全消防系统（上海）有限公司 | One kind is without labyrinth smoke detection light room structure |
| CN107516396A (en) * | 2017-09-05 | 2017-12-26 | 深圳市泰和安科技有限公司 | A kind of two-way photoelectric smoke sensor |
| CN111199628A (en) * | 2018-11-20 | 2020-05-26 | 海湾安全技术有限公司 | Smoke detector |
| CN110443972A (en) * | 2019-09-12 | 2019-11-12 | 深圳市泛海三江电子股份有限公司 | Labyrinth structure of smoke alarm and labyrinth background value control method |
| CN110459033A (en) * | 2019-09-12 | 2019-11-15 | 深圳市泛海三江电子股份有限公司 | Dual-wavelength dual-light-path smoke detection labyrinth and method |
| CN110443972B (en) * | 2019-09-12 | 2024-02-06 | 深圳市高新投三江电子股份有限公司 | Maze background value control method |
| CN113327397A (en) * | 2021-05-20 | 2021-08-31 | 浙江华消科技有限公司 | Smoke detector labyrinth structure and smoke alarm |
| CN113327397B (en) * | 2021-05-20 | 2022-03-01 | 浙江华消科技有限公司 | Smoke detector labyrinth structure and smoke alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060726 Termination date: 20120610 |