CN113936410B

CN113936410B - Small labyrinth smoke sensor

Info

Publication number: CN113936410B
Application number: CN202111482332.4A
Authority: CN
Inventors: 邓伟槐; 曾勇刚
Original assignee: Shenzhen Heiman Technology Co ltd
Current assignee: Shenzhen Heiman Technology Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2023-04-18
Anticipated expiration: 2041-12-06
Also published as: CN113936410A

Abstract

The application discloses small-size maze smoke transducer relates to the field of alarm, include the mounting panel and connect in the lid of mounting panel, the lid is inside hollow structure and lateral wall and sets up the fretwork groove that link up the inside and outside both sides of lid, enclose into detection area between mounting panel and the lid inner chamber, light source and photoreceptor are installed to one side that the mounting panel deviates from the lid, offer the light trap that is used for supplying the light to pass through on the mounting panel, be provided with the bellying towards one side of mounting panel in the lid, the bellying reduces to the direction cross sectional area who is close to the mounting panel gradually, and the one end that the bellying is close to the light trap is sharp taper structure, the pointed end of bellying is located the extension route of light trap. The application can improve the accuracy in the process of monitoring smoke.

Description

Small labyrinth smoke sensor

Technical Field

The application relates to the technical field of alarms, in particular to a small labyrinth smoke sensor.

Background

The smoke alarm is an alarm device for monitoring smoke concentration in optical, acoustic, electrical and other modes, and can give an alarm when the smoke concentration reaches a certain value, so that the smoke alarm is widely applied to buildings.

Among the smoke alarm usually including the casing and install light source and light source receptor in the casing, the casing lateral wall makes smog can get into in the casing for hollow out construction, and when smog got into smoke alarm, the smog particle can carry out diffuse reflection to the light that the light source sent, and light source receptor can receive light signal to turn into the light signal the signal of telecommunication, thereby realize the judgement and the warning to the conflagration according to the intensity of signal of telecommunication.

Because the cavity with a certain size is formed in the shell, smoke can be dispersed in the cavity of the shell when entering the shell, so that a smoke blind area which cannot be irradiated by a light source easily exists, an optical signal value received by a light source receiver is smaller than an actual smoke concentration value, and the accuracy of alarming is influenced.

Disclosure of Invention

In order to improve the accuracy of smoke sensor, this application provides a small-size maze smoke sensor.

The application provides a small-size maze smoke transducer adopts following technical scheme:

the utility model provides a small-size maze smoke transducer, includes the mounting panel and connects in the lid of mounting panel, the fretwork groove that link up the inside and outside both sides of lid is seted up for inside hollow structure and lateral wall to the lid, enclose into detection area between mounting panel and the lid inner chamber, light source and photoreceiver are installed to one side that the mounting panel deviates from the lid, offer the light trap that is used for supplying the light to pass through on the mounting panel, be provided with the bellying towards one side of mounting panel in the lid, the bellying reduces gradually to the direction cross-sectional area that is close to the mounting panel, and the one end that the bellying is close to the light trap is sharp taper structure, the most advanced of bellying is located the extension route of light trap.

By adopting the technical scheme, when the portable smoke detector is used, the mounting plate is usually connected to a ceiling and other positions, the light source mounted on the mounting plate can enter the detection area through the light holes, smoke can enter the detection area through the hollow grooves in the side wall of the cover body, the smoke can diffuse light, the diffusely reflected light can pass through the light holes and be received by the light receiver, and the light signal received by the light receiver is stronger when the smoke concentration is higher, so that the alarm is realized; the bulge is of a tapered structure in the direction close to the light hole, the end part of the bulge is of a tip structure, when the smoke sensor is mounted on a ceiling, the tip of the bulge can be located right below the light hole, when smoke in the air enters the cover body, the smoke can be blocked by the bulge, and then the smoke moves upwards along the bulge and moves right below the light hole, so that the accuracy of the smoke monitoring effect is improved; in addition, the bulge is the convergent to the direction that is close to the light trap, and when outside light source entered into the lid inner chamber through the fretwork groove, can be by the surface reflection of bulge, reduce the condition that outside light entered into the light trap.

Optionally, the holding tank has been seted up to one side that the mounting panel deviates from the lid, light source and photoreceiver are installed in the holding tank, install the connecting plate that is used for the lid to close the holding tank on the mounting panel.

Through adopting above-mentioned technical scheme, the light source with irritate the receiver and install in the holding tank to the connecting plate can cover the holding tank, thereby can protect light source and light receiver, and also can reduce the condition that outside light source shines light source and light receiver, accuracy when further improving smoke alarm and using.

Optionally, install the installation piece in the holding tank, a plurality of mounting grooves have been seted up on the installation piece, mounting groove and light trap are linked together, light source and receiver are installed in the mounting groove of difference.

Through adopting above-mentioned technical scheme, light source and light receiver place in the mounting groove of difference to can reduce the interference between light source and the light receiver, accuracy when further improving the use.

Optionally, the cross-sectional area of the light-transmitting hole gradually decreases towards a direction close to the cover body.

Through adopting above-mentioned technical scheme, the light that the inner wall of light trap can send the light source reflects, can send and receive the light better, improves the accuracy of monitoring.

Optionally, vertically be provided with a plurality of special-shaped strips on the inner wall of lid, the circumference interval distribution of bellying is followed to special-shaped strip, special-shaped strip include with lid inner wall connection's connecting portion and keep away from the portion of being in the light of connecting portion one end, adjacent form the first passageway that is used for supplying smog to pass through between the connecting portion, adjacent form the second passageway between the portion of being in the light, the first passageway is throat column structure to the direction that is close to the bellying, the second passageway is flaring column structure to the direction that is close to the bellying.

Through adopting above-mentioned technical scheme, when smog got into the lid through the fretwork groove in, smog was earlier through first passageway, then in the second passageway got into the lid again, first through being throat column structure, can reduce outside light source and enter into the lid in to reduce outside light interference to the accuracy of monitoring.

Optionally, a light blocking strip extending vertically upward is disposed on the bottom surface of the cover body, the light blocking strip is located in the first channel, and a gap exists between a side wall of the light blocking strip and the adjacent connecting portion.

Through adopting above-mentioned technical scheme, under the effect of the strip that is in the light, the outside light source of reduction that can be further enters into the lid in, accuracy when further improving the monitoring.

Optionally, one end of the light blocking portion close to the protruding portion is in a tip structure, and side walls on two sides of the light blocking portion are in an arc structure.

Through adopting above-mentioned technical scheme, the light that the light source passes through the light trap can reflect through the surface of bellying, and the portion that is in the light also can reflect it to reduce the influence of self light source to the monitoring accuracy.

Optionally, the lateral wall of mounting panel is provided with the location strip, the constant head tank that is used for supplying location strip butt is seted up to the inner wall of lid, works as when location strip butt is in the constant head tank, connecting plate butt is in the up end of lid.

By adopting the technical scheme, when the cover body is connected with the mounting plate, the positioning strip is abutted to the positioning groove, so that the mounting plate is not easy to move after being connected to the cover body, and the stability of the structure is improved.

Optionally, the upper end of the cover body is provided with a fixing column penetrating through the connecting plate.

By adopting the technical scheme, the connecting plate and the cover body are connected together through the fixing column, and the stability of the connecting plate and the cover body in connection is further improved.

In summary, the present application includes at least one of the following advantages:

1. the bulge part can reduce the influence of a light source on the monitoring accuracy, and can guide the smoke entering the cover body, so that the smoke is more easily positioned below the light-transmitting hole, and the sensitivity of the smoke sensor during monitoring is improved;

2. the special-shaped strip and the light blocking strip can reduce the external light source entering the cover body under the combined action, and the monitoring accuracy is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is an exploded schematic view of an embodiment of the present application;

fig. 3 is a schematic structural view of a projection portion in the embodiment of the present application.

Description of reference numerals: 1. mounting a plate; 2. a cover body; 3. hollowing out the grooves; 4. a light source; 41. a blue LED; 42. a red LED; 5. an optical receiver; 6. a light-transmitting hole; 7. a boss portion; 8. accommodating grooves; 9. a connecting plate; 10. mounting a block; 11. mounting grooves; 12. special-shaped strips; 121. a connecting portion; 122. a light blocking section; 13. a first channel; 14. a second channel; 15. a light blocking strip; 16. a positioning bar; 17. positioning a groove; 18. vertical bars; 19. a ring strip; 20. the column is fixed.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses small-size maze smoke transducer. Referring to fig. 1 and 2, the smoke sensor includes a mounting plate 1 and a cover 2, the cover 2 is a hollow structure, and the mounting plate 1 is mounted on an inner wall of an opening at an upper end of the cover 2. Connecting plate 9 is installed to the one side that lid 2 deviates from lid 2, and connecting plate 9 can be fixed in on the ceiling through modes such as screws. The hollow grooves 3 are evenly formed in the side wall of the cover body 2, the hollow grooves 3 penetrate through the inner side and the outer side of the cover body 2, a cavity enclosed between the cover body 2 and the mounting plate 1 forms a detection area, and external smoke and the like can enter the cover body 2 through the hollow grooves 3.

Referring to fig. 2 and 3, the mounting plate 1 is provided with an accommodating groove 8, and the connecting plate 9 can be covered in the accommodating groove 8 when being mounted on the mounting plate 1. Install light source 4 and light receiver 5 in the holding tank 8, light trap 6 has been seted up to holding tank 8's bottom surface, and light trap 6 link up the upper and lower both sides of mounting panel 1 for light source 4's light can enter into 2 inner chambers of lid through light trap 6, and the smog of 2 inner chambers of lid reflects the back to light, and light after the reflection also can be received through light trap 6 and by light receiver 5. Light source 4 and optical receiver 5 are installed in holding tank 8, install mounting panel 1 on lid 2 again, install connecting plate 9 on lid 2 through modes such as screw at last for light source 4 of outside is difficult to cause the interference to light source 4 and optical receiver 5.

Referring to fig. 2 and 3, further, in order to improve the stability of the mounting plate 1 in the cover 2, a positioning strip 16 is provided on the side wall of the mounting plate 1, a positioning groove 17 for abutting the positioning strip 16 is provided on the inner wall of the cover 2, and the upper end of the positioning groove 17 penetrates through to the upper surface of the cover 2. When the positioning bar 16 abuts against the positioning groove 17, the connecting plate 9 is connected to the cover 2, and the lower surface of the connecting plate 9 abuts against the upper end surface of the cover 2, so that the stability of the mounting plate 1 during mounting is improved. Further, the upper end of lid 2 is fixed with fixed column 20, and connecting plate 9 is worn to establish by fixed column 20, improves the stability that connecting plate 9 and lid 2 link together.

Referring to fig. 2 and 3, the inner bottom surface of the cover 2 is provided with a protruding portion 7, the cross section of the protruding portion 7 is tapered toward the light-transmitting hole 6, one end of the protruding portion 7 close to the light-transmitting hole 6 is tapered, and the tip of the protruding portion 7 faces the light-transmitting hole 6. The cross-section of the mounting plate 1 is circular, the light transmission hole 6 is arranged at the position of the circle center of the mounting plate 1, the aperture of the light transmission hole 6 is in a tapered structure in the direction close to the cover body 2, the light source 4 can enter the cover body 2, the reflected light can be received by the light receiver 5, and when the sensor is mounted on a ceiling, the tip of the protruding part 7 is positioned under the light transmission hole 6.

Referring to fig. 2 and 3, after the smoke enters the inner cavity of the cover body 2, the smoke is blocked by the lug boss 7, the smoke can only move upwards, and the tip of the lug boss 7 is positioned right below the light transmission hole 6, so that the smoke can be guided to the position below the light transmission hole 6 by the lug boss 7 no matter which direction the external smoke enters the inner cavity of the cover body 2, and the possibility of occurrence of blind areas is reduced. The outer sole of lid 2 is towards the sunken shaping of the inner chamber of lid 2 to formed bellying 7, made things convenient for production and improved the area of the outer bottom surface of lid 2, produced heat when external environment conflagration breaks out makes bellying 7 transmit the heat more easily, thereby helps the motion of smog in the lid 2.

Referring to fig. 2 and 3, an installation block 10 is further installed on the bottom surface inside accommodating groove 8, a plurality of installation grooves 11 are formed in installation block 10, installation grooves 11 are three in this embodiment, each installation groove 11 penetrates through the upper side and the lower side of installation block 10, and when installation block 10 is installed on the bottom surface of accommodating groove 8, each installation groove 11 is communicated with light-transmitting hole 6. One of the mounting grooves 11 is provided with a red LED42, one of the mounting grooves 11 is provided with a blue LED41, the light receiver 5 is mounted on the last mounting groove 11, and the light source 4 and the light receiver 5 are separated from each other by the mounting grooves 11, so that the mutual interference between the light sources 4 is reduced. The smoke has stronger reflection to blue light and weaker reflection to red light; the water mist and dust reflect red light more strongly and blue light less strongly, and the light receiver 5 analyzes the intensity of the received blue light and the intensity of the red light. When a fire disaster occurs, smoke is more, so that the light receiver 5 can receive stronger blue light, and when water mist or dust exists, the light receiver 5 can receive stronger red light signals, namely, the smoke or the water mist can be judged through the blue light signals and the red light signals, so that the possibility of false alarm is reduced.

Referring to fig. 2 and 3, a plurality of vertical bars 18 are vertically installed on the inner wall of the cover body 2, the vertical bars 18 are uniformly distributed along the circumferential direction of the cover body 2, a ring bar 19 for connecting all the vertical bars 18 together is further installed on the side wall of the cover body 2, the ring bar 19 is uniformly arranged along the length direction of the vertical bars 18, and the vertical bars 18 and the ring bar 19 form the hollow groove 3 on the side wall of the cover body 2.

Referring to fig. 2 and 3, the inside of the cover body 2 is uniformly connected with the irregular strips 12, the irregular strips 12 are vertically arranged, the irregular strips 12 are uniformly arranged along the circumferential direction of the cover body 2, and a space is formed between the adjacent irregular strips 12 for smoke to pass through. The profile strip 12 includes a connecting portion 121 and a light blocking portion 122, the connecting portion 121 is used for connecting with the inner wall of the cover 2, and the light blocking portion 122 is located at one end of the connecting portion 121 far away from the inner wall of the cover 2. The connecting portion 121 may be fixed to the inner wall of the lid body 2 by bonding or the like. The first passage 13 is formed between the adjacent connecting portions 121, the second passage 14 is formed between the adjacent light blocking portions 122, and the smoke passes through the first passage 13 and then the second passage 14 when entering the cover body 2. The first channel 13 is in a necking structure towards the direction close to the boss 7, and the second channel 14 is in a flaring structure towards the direction close to the boss 7. The smoke concentration at the first channel 13 will become higher, and the space will become larger when the smoke enters the second channel 14, so that the smoke can enter the cover body 2 at a higher speed and move towards the direction of the convex part 7, and the smoke can be better guided to the upper end position of the convex part 7.

Referring to fig. 2 and 3, a plurality of light blocking strips 15 extending upward are fixed to the bottom surface of the cover 2, and the light blocking strips 15 are distributed in each first channel 13 one by one. There is a gap between the light blocking strip 15 and the adjacent connecting portion 121, and the smoke needs to bypass the light blocking strip 15 first when entering the first passage 13. Therefore, when the external light source 4 passes through the hollow-out groove 3, the light blocking strip 15 can block the light, so that the reduced external light source 4 affects the monitoring accuracy.

Referring to fig. 2 and 3, the one end that light blocking portion 122 is close to bellying 7 is most advanced structure to the both sides lateral wall of light blocking portion 122 is the arc structure, and when light source 4 entered into lid 2 through light trap 6 in, the surface of bellying 7 can be launched light, and light blocking portion 122's lateral wall also can be launched light source 4, thereby reduces self light source 4 and causes the influence to the accuracy of monitoring.

The implementation principle of the small labyrinth smoke sensor provided by the embodiment of the application is as follows: when smog enters into lid 2, earlier through fretwork groove 3, then continue to loop through first passageway 13 and second passageway 14, smog enters into the lid 2 inner chamber after, takes under the effect of blockking of bellying 7, smog can the upward movement to guide smog to the below of light trap 6, and no matter smog enters into lid 2 from which direction, all can realize guiding smog to the effect of light trap 6 below, thereby the production of the blind area of reduction, improve the monitoring accuracy.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A small labyrinth smoke sensor, comprising: the detection device comprises a mounting plate (1) and a cover body (2) connected to the mounting plate (1), wherein the cover body (2) is of an internal hollow structure, a hollow groove (3) penetrating through the inner side and the outer side of the cover body (2) is formed in the side wall of the cover body (2), a detection area is defined between the mounting plate (1) and the inner cavity of the cover body (2), a light source (4) and a light receiver (5) are installed on one side, away from the cover body (2), of the mounting plate (1), a light hole (6) for light to pass through is formed in the mounting plate (1), a bulge part (7) is arranged on one side, facing the mounting plate (1), in the cover body (2), the cross-sectional area of the bulge part (7) is gradually reduced towards the direction close to the mounting plate (1), one end, close to the light hole (6), of the bulge part (7) is of a pointed cone-shaped structure, and the tip of the bulge part (7) is located on the extending path of the light hole (6);

the utility model discloses a smog-proof cover, including lid (2), the inner wall of lid (2) is provided with a plurality of special-shaped strips (12) on the vertical, the circumference interval distribution of bellying (7) is followed in special-shaped strip (12), connecting portion (121) that is connected with lid (2) inner wall and the portion (122) that is in the light of keeping away from connecting portion (121) one end are included in special-shaped strip (12), and are adjacent form between connecting portion (121) and be used for supplying smog to pass through first passageway (13), and are adjacent form second passageway (14) between portion (122) that is in the light, first passageway (13) are throat column structure to the direction that is close to bellying (7), second passageway (14) are flaring column structure to the direction that is close to bellying (7).

2. A mini maze smoke sensor as defined in claim 1 wherein: holding tank (8) have been seted up to one side that mounting panel (1) deviates from lid (2), install in holding tank (8) light source (4) and photoreceiver (5), install connecting plate (9) that are used for the lid to close holding tank (8) on mounting panel (1).

3. A mini labyrinth smoke sensor as claimed in claim 2, wherein: install installation piece (10) in holding tank (8), a plurality of mounting grooves (11) have been seted up on installation piece (10), mounting groove (11) and light trap (6) are linked together, light source (4) and receiver are installed in different mounting grooves (11).

4. A mini maze smoke sensor as defined in any one of claims 1-3, wherein: the cross section area of the light hole (6) is gradually reduced towards the direction close to the cover body (2).

5. A mini maze smoke sensor as defined in claim 1 wherein: the bottom surface of the cover body (2) is provided with a light blocking strip (15) extending vertically upwards, the light blocking strip (15) is located in the first channel (13), and a gap exists between the side wall of the light blocking strip (15) and the adjacent connecting part (121).

6. The mini-maze smoke sensor of claim 1, wherein: one end of the light blocking part (122) close to the protruding part (7) is in a tip structure, and the side walls of two sides of the light blocking part (122) are in arc structures.

7. A mini labyrinth smoke sensor as claimed in claim 2, wherein: the lateral wall of mounting panel (1) is provided with location strip (16), constant head tank (17) that are used for supplying location strip (16) butt are offered to the inner wall of lid (2), work as when location strip (16) butt is in constant head tank (17), connecting plate (9) butt is in the up end of lid (2).

8. A mini maze smoke sensor as defined in claim 1 wherein: the upper end of the cover body (2) is provided with a fixing column (20) penetrating through the connecting plate (9).