CN201000432Y

CN201000432Y - Smog detecting chamber

Info

Publication number: CN201000432Y
Application number: CNU2007201055647U
Authority: CN
Inventors: 张维国
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-15
Filing date: 2007-01-15
Publication date: 2008-01-02
Anticipated expiration: 2017-01-15

Abstract

The utility model relates to a detecting device, in particular to a smog detecting chamber, which comprises a light source sender and a light source receiver, wherein an included angle Alpha and a plurality of light blinding bodies are arranged between the light source sender and the light source receiver, the light source sender, the receiver and the light blinding body are connected together, to form a cavity body, and a blocking body is arranged in the area of the included angle Alpha inside the cavity body, the blocking body consists of a plurality of triangles connected, the distance between the blocking body and the light source sender is equivalent to the distance between the blocking body and the light source receiver, the triangle blocking body faces to the two sides of the light source sender and the light source receiver, and respectively intersects with the stretching lines of the end face of the light source sender and the light source receiver which are corresponding to the triangle blocking body. The utility model mainly provides a smog detecting chamber with simple and severe structure, sharp detection, and can block off primary reflected light and secondary reflected light; the utility model solves the technical problems of the prior art that the structure of a maze inside the dark chamber of the detector is complex, the blocking area is large, and no sensitiveness exists.

Description

A kind of smoke detection chamber

Technical field

The utility model relates to a kind of sniffer, relates in particular to a kind of smoke detection chamber.

Background technology

Now various detector emerges in an endless stream, and also each is variant for the detector that it adopted, and mainly is three types in ion, photoelectricity, temperature-sensitive.In early days widely used is the ion-type detector, the radioisotopic radioactive half-life 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.Common photoelectric smoke type detector is made up of detecting chamber, infrared emission tube, infrared receiver tube and opto-electronic conversion components and parts etc., as Chinese patent CN2800269.Its detection method mainly contains " forward direction " and " back to " two types; So-called " forward direction " and " back to " be reflected light as orientation, flue dust scattered light direction with launch light and be called " forward direction " in the same way, and be 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 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 in the scattering of flue dust generation greater than 90 ° of directions.In above-mentioned two kinds of detection methods, adopt various forms darkroom structure to obtain different measurement performances, be furnished with various labyrinth in the darkroom of a lot of forms.In order to make detector more responsive, what the light source receiver received generally all is three light or four light.Therefore in the darkroom, generally all be provided with block body, the light that comes the scattering light source transmitter to send.

Summary of the invention

The utility model mainly provides a kind of simple and compact for structure, can effectively stop once and secondary reflection light, surveys sensitive smoke detection chamber; Solve the labyrinth structure complexity in the existing detector of the prior art darkroom, stop that area is big, insensitive technical matters.

Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: a kind of smoke detection chamber, comprise light emitted device and light source receiver, be provided with angle α between the two, be provided with some light shields between described light emitted device and the light source receiver, the light emitted device, receiver and light shield are connected to form a cavity, angle α zone in cavity is provided with block body, described block body is connected and composed by some triangles, block body equates with distance between light emitted device and the light source receiver, the triangle block body is towards the both sides of light emitted device and light source receiver, and the extended line of relative with it respectively light emitted device and light source receiver end face intersects.Light shield is connected and composed by several triangles, the two sides of facing light emitted device and light source receptacle all is a serrated face, because serrated face is to be made of different inclined-plane, some angles of inclination, shine the light of serrated face, through reflexing on the different light shields, the effectively light scattering that the light emitted device is emitted, behind block body and light shield, the light that enters the light source receiver is three light or four light, and the background value of Que Dinging is also just very little thus, tests more sensitive.

The cavity that light emitted device, receiver and light shield form is a lighttight cavity.When not having smog, the light of launching in the transmitter behind superrefraction, arrives receiver, is worth as a setting with this.Smog is entered in the detecting chamber by air inlet, and the infrared light that transmitter sends produces irregular scattered light when shining particle in the smog, has surpassed the background value of setting, and receiver converts the reflected light that receives to electric signal and amplifies output, forms and surveys.This shows that background value is more little, when smog enters, just sensitive more.This just requires when not having smog, and the light that the light emitted device sends is through getting over refraction repeatedly, and the light that arrives receiver is also just weak more, thereby background value is also just more little.Between light emitted device, receiver angle is set, can allows can directly not enter receiver by the light that sends in the light emitted device, but reflect through behind the light shield, the light behind superrefraction dies down.

As preferably, described block body is to be connected and composed by the isosceles triangle that 2 areas successively decrease, the central lines of two isosceles triangles, and two leg-of-mutton area ratios are 2.5: 1-4: 1.Block body is made of two triangles, the convenient manufacturing.

As preferably, the angle of two the isosceles limits of described block body and the end face of light emitted device and light source receiver is 4-10 °.The most most preferably, angle is 5 °.Block body is made of two isosceles triangles, and after two triangles fused, the secondary light through after the light shield reflection reflexed on the block body again, because the block body face is a serrated face, has further reduced light intensity.Between the isosceles limit of triangle block body and light emitted device and receiver angle is set, can makes the light scattering effect that emits by the light emitted device better.

As preferably, described light shield is " people " font, and the angle between the dual-side of described formation " people " font light shield is 50 °-90 °, and as more preferably, angle is 70 °.The free end of described side is provided with the dip plane, and the angle between side and the dip plane is 20 °-50 °.As most preferably, angle is 35 °.Light shield is " people " font, has reduced the shielded area that smog enters, and structure is also simple simultaneously.On the side of light shield, be provided with the dip plane, make to make things convenient for reflect focalization by the wedge angle that the free end of side forms.

As preferably, the free-ended line of light shield inner side edge is rounded.The line that the light shield free end forms each summit of wedge angle forms a circle, can be so that internal reflect focalization better effects if.

As preferably, the angle between described transmitter and the receiver is 130 °.

Therefore, the utlity model has following advantage: 1. " people " font light shield is set, can so that smog to stop area little, labyrinth structure is simple simultaneously, the convenient manufacturing; 2. the triangle block body is set, can effectively avoids once light and secondary light, reduce the background light value, detector is more responsive.

Description of drawings:

Fig. 1 is the one-piece construction synoptic diagram of a kind of smoke detection of the present utility model chamber;

Fig. 2 is the enlarged diagram of the block body at D place in Fig. 1;

Fig. 3 is the enlarged diagram of the light shield at C place in Fig. 1;

Fig. 4 is the front view of the loam cake among Fig. 1;

Fig. 5 is the side view of the loam cake among Fig. 1.

The concrete example of implementing:

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment:

As shown in Figure 1, a kind of smoke detection chamber comprises loam cake 1 and base plate 2, and base plate 2 is rounded, and light source transmitter 3 and light source receiver 4 on described base plate 2 are provided with angle α between light emitted device 3 and the receiver 4, and angle α is 130 °.Between light emitted device 3 and receiver 4, be provided with light shield 5, three's connection surrounds a circular cavity 11, cavity zone in above-mentioned angle α scope is a de-militarized zone, in this zone, be provided with a block body 6, block body 6 is to be formed by connecting by two isosceles triangles, the central lines of two isosceles triangles, leg-of-mutton size is successively decreased, and two leg-of-mutton area ratios are 3: 1 (as shown in Figure 2).The extended line on two isosceles limits of isosceles triangle block body 6 is 5 ° with the angle of cut β of the end face extended line of light emitted device 3 and light source receiver 4 respectively.Described light shield 5 is " people " font, angle of cut A between the dual-side of formation " people " font light shield 5 is 70 °, the openend of two sides, also be that free end is provided with a dip plane 10, make the side bottom of light shield 5 form a wedge angle B (as shown in Figure 3), formed wedge angle B is 35 °.The summit of light shield 5 inboard each wedge angle B is connected to form a circle, convenient internal reflect focalization.

Shown in attached Figure 4 and 5, on base plate 2, be evenly equipped with 3 spliced eyes 7, cooperate with grafting pin 8 in the loam cake 1, base plate 2 and loam cake 1 are fastened.Described 3 spliced eyes 7, wherein two are separately positioned on light emitted device 3 and the receiver 4, and another one is arranged in the light shield 5 of sensitizing range.Also all going on foot on base plate has 3 fixedly grabs 9, is used for linking to each other with circuit board.

Specific embodiment described herein only is that design of the present utility model is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims

1. smoke detection chamber, comprise light emitted device (3) and light source receiver (4), be provided with angle α between the two, be provided with some light shields (5) between described light emitted device (3) and the light source receiver (4), light emitted device (3), receiver (4) and light shield (5) are connected to form a cavity (11), angle α zone in cavity (11) is provided with block body (6), it is characterized in that: described block body (6) is connected and composed by some triangles, block body (6) equates with distance between light emitted device (3) and the light source receiver (4), triangle block body (6) is towards the both sides of light emitted device (3) and light source receiver (4), and the extended line of relative with it respectively light emitted device (3) and light source receiver (4) end face intersects.

2. a kind of smoke detection according to claim 1 chamber, it is characterized in that: described block body (6) is to be connected and composed by the isosceles triangle that 2 areas successively decrease, the central lines of two isosceles triangles, two leg-of-mutton area ratios are 2.5: 1-4: 1.

3. a kind of smoke detection according to claim 2 chamber is characterized in that: the angle of two the isosceles limits of described block body (6) and the end face of light emitted device (3) and light source receiver (4) is 4-10 °.

4. according to claim 1 or described a kind of smoke detection chambers 2 or 3, it is characterized in that: described light shield (5) is " people " font, angle between the dual-side of described formation " people " font light shield (5) is 50 °-90 °, the free end of described side is provided with the dip plane, and the angle between side and dip plane (10) is 20 °-50 °.

5. according to any described a kind of smoke detection chamber in the claim 4, it is characterized in that: the free-ended line of light shield (5) inner side edge is rounded.

6. according to any described a kind of smoke detection chamber in the claim 1 to 3, it is characterized in that: the angle between described light emitted device (3) and the receiver (4) is 130 °.