CN216211440U

CN216211440U - Fire detection device

Info

Publication number: CN216211440U
Application number: CN202122746027.3U
Authority: CN
Inventors: 李子硕
Original assignee: Tianjin Zhongyichuang Technology Co ltd
Current assignee: Tianjin Zhongyichuang Technology Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-05
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a fire detection device, which comprises a shell, wherein a horizontal partition plate is arranged in the shell, the horizontal partition plate divides an inner cavity of the shell into an upper device chamber and a lower gas circulation chamber, a suction fan and a smoke detector are arranged in the device chamber, and the gas circulation chamber is divided into a first air channel, a second air channel and a third air channel by arranging a first vertical partition plate and a second vertical partition plate in the gas circulation chamber; according to the smoke detection device, the suction fan is arranged, most of smoke sucked by the suction fan is discharged, a small part of smoke is sucked and circulated, and then the smoke is detected by the smoke sensor, so that the smoke inlet is reduced, the smoke detector is protected, the service life is prolonged, the smoke circulation is rapid and stable, and the real-time and accurate measurement is guaranteed.

Description

Fire detection device

Technical Field

The utility model relates to the technical field of gas concentration detection, in particular to a fire detection device.

Background

The smoke-sensitive fire detector is used for detecting smoke generated by fire and sending out an alarm signal. Smoke fire detectors can be classified into ion type, photoelectric type, laser type, infrared beam type, image type, and suction type smoke detectors. After a fire disaster occurs, fire smoke with higher temperature moves upwards, and a smoke detector arranged on the top detects that the concentration of the smoke is greater than a certain limit concentration, and then an alarm signal is sent out. When the existing detection device is used for detection, a large amount of smoke or dust in the air enters the detector, the smoke or dust is used for a long time, and the smoke or dust is deposited, so that the measurement accuracy and the sensitivity are influenced, and the service life of the detector is also influenced; in addition, the existing smoke detector mainly diffuses the smoke freely, so that the difference between the measurement and the actual environment is easily caused due to slow free diffusion, the real-time performance of the measurement cannot be achieved, and the sensitivity is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to provide a fire detection device that addresses the above-mentioned deficiencies of the prior art.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

a fire detection device comprises a shell, wherein a horizontal separation plate is arranged in the shell, an inner cavity of the shell is separated by the horizontal separation plate to form an upper device chamber and a lower gas circulation chamber, a suction fan and a smoke detector are arranged in the device chamber, and the gas circulation chamber is separated by a first vertical separation plate and a second vertical separation plate to form a first air channel, a second air channel and a third air channel;

an air suction opening is formed in the position, corresponding to the air suction fan, of the horizontal partition plate, and the first vertical partition plate divides the air suction opening into a first smoke suction opening and a second smoke suction opening; a detection flue gas inlet and a detection flue gas outlet are formed in the position, corresponding to the smoke detector, on the partition plate; an air inlet is formed in the side wall of one side of the shell, an air outlet is formed in the side wall of the other side of the shell, and a circulating opening is formed in the position, corresponding to the air outlet, of the horizontal partition plate; the air inlet is communicated with the first smoke suction port through a first air channel, the circulating port is communicated with the detection smoke inlet through a third air channel, and the detection smoke outlet is communicated with the second smoke suction port through a second air channel.

Furthermore, the ventilation ratio of the first smoking port to the second smoking port is 4: 1.

Furthermore, the number of the air inlets is two, and a first air deflector is arranged at the position of each air inlet.

Furthermore, a second air deflector is arranged at the air outlet and guides the flue gas to the circulation port.

Further, the smoke detector includes the shell body and set up in the cap of shell body both sides, one side of shell body has set gradually laser instrument, diaphragm, detection room and detection room, it is provided with the reflecting plate to detect the indoor slope, the reflecting plate will it separates formation extinction room and installation room to detect the room, be provided with photosensitive element in the installation room, one side of detecting the room is provided with into mouth and outlet flue, the light beam of laser instrument transmission passes on the diaphragm, detects the reflecting plate that shoots into extinction room behind the room.

Furthermore, the other side of the shell body is provided with an accommodating cavity for accommodating the circuit control board.

Furthermore, the diaphragms are three and parallel to each other.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the smoke suction fan is arranged, most of smoke sucked by the suction fan is discharged, a small part of smoke is sucked and circulated, and then the smoke is detected by the smoke sensor, so that the smoke inlet is reduced, the smoke detector is protected, the service life is prolonged, the smoke circulation is rapid and stable, and the real-time and accurate measurement is ensured;

the other end corresponding to the laser is provided with the extinction chamber, so that the laser beam is absorbed in the extinction chamber, reflection and astigmatism are avoided, the measurement result is prevented from being influenced, and the detection sensitivity is improved; in addition, the accommodating cavity for accommodating the circuit board is arranged on the other side of the main shell, so that the structure design is reasonable, the product volume is reduced, the use of plug connectors is reduced, and the installation stability and the assembly efficiency are improved; the utility model also arranges a plurality of diaphragms between the laser and the detection chamber, which not only can filter and reduce the interference of astigmatism to measurement, but also can reduce the influence of dust on the laser; the utility model has simple structure, reasonable design and high sensitivity and stability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the present invention with the upper cover removed;

FIG. 3 is a schematic view of the present invention with the suction fan and smoke detector removed;

FIG. 4 is a schematic view of the present invention with the lower cover removed;

FIG. 5 is a schematic view of the smoke detector of the present invention;

FIG. 6 is a schematic view of the smoke detector of the present invention with the cover removed;

figure 7 is a schematic view of the smoke detector of the present invention with the cover removed and the other side of the smoke detector removed.

In the figure: 1. a housing; 2. a horizontal partition plate; 3. an air suction fan; 4. a smoke detector; 5. a first vertical separation plate; 6. a second vertical partition plate; 7. a first air duct; 8. a second air duct; 9. a third air duct; 10. a first smoking port; 11. a second smoking port; 12. detecting a flue gas inlet; 13. detecting a flue gas outlet;

14. an air inlet; 15. an air outlet; 16. a circulation port; 17. a first air deflector; 18. a second air deflector; 19. a housing body; 20. a shell cover; 21. a laser; 22. a diaphragm; 23. a detection chamber; 24. a reflective plate; 25. an extinction chamber; 26. an installation chamber; 27. a photosensitive element; 28. a smoke inlet; 29. a smoke outlet; 30. a circuit control board; 31. an accommodating cavity.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-7, a fire detection device according to a specific embodiment of the present invention includes a housing 1, a horizontal partition plate 2 is disposed in the housing 1, the horizontal partition plate 2 partitions an inner cavity of the housing 1 into an upper device chamber and a lower gas circulation chamber, a suction fan 3 and a smoke detector 4 are disposed in the device chamber, a fixing groove adapted to the suction fan 3 and the smoke detector 4 is disposed in the device chamber, the fixing groove is fixed to prevent shaking, and a first vertical partition plate 5 and a second vertical partition plate 6 are disposed in the gas circulation chamber to partition the gas circulation chamber into a first air channel 7, a second air channel 8 and a third air channel 9;

an air suction opening is formed in the position, corresponding to the air suction fan 3, of the horizontal partition plate 2, the air suction fan 3 is located at the air suction opening, the air suction opening is partitioned by the first vertical partition plate 5 to form a first smoke suction opening 10 and a second smoke suction opening 11, the first smoke suction opening 10 is located in the first air channel 7, and the second smoke suction opening 11 is located in the second air channel 8; a detection flue gas inlet 12 and a detection flue gas outlet 13 are formed in the position, corresponding to the smoke detector 4, on the partition plate, the detection flue gas inlet 12 is located in the third air duct 9, the detection flue gas outlet 14 is located in the second air duct 8, the detection flue gas inlet 12 is communicated with a smoke inlet of the smoke detector, and the detection flue gas outlet 13 is communicated with a smoke outlet 29; an air inlet 14 is formed in the side wall of one side of the shell 1, an air outlet 15 is formed in the side wall of the other side of the shell 1, the air outlet 15 corresponds to an exhaust port of the suction fan, a circulating port 16 is formed in the position, corresponding to the air outlet 15, of the horizontal partition plate 2, and the circulating port 16 is located in the third air duct;

the air inlet 14 is communicated with the first smoke suction port 10 through a first air duct 7, the circulation port 16 is communicated with the detection smoke inlet 12 through a third air duct 9, and the detection smoke outlet 13 is communicated with the second smoke suction port 11 through a second air duct 8.

When the smoke detector is used, smoke enters the first air channel 7 through the air inlet 14 and is sucked by the suction fan 3 through the first smoke suction port 10, a large part of smoke is discharged through the air outlet 15, a small part of smoke enters the third air channel 9 through the circulating port 16, enters the smoke detector 4 through the detection smoke inlet 12 under the action of the suction fan 3, is discharged from the detection smoke outlet 13, enters the second air channel 8, is sucked by the suction fan 3 through the second suction port 11, and is circulated again.

Further, the ventilation ratio of the first smoking port 10 to the second smoking port 11 is 4: 1. The smoke quantity entering the smoke detector is reduced, the smoke detector is protected, and the service life is prolonged.

Furthermore, there are two air inlets 14, and a first air deflector 17 is disposed at the air inlet 14.

Further, a second air deflector 18 is vertically arranged at the air outlet 15, and the second air deflector 18 guides the flue gas to the circulation port 16, so that a part of the flue gas is circulated.

Further, smoke detector 4 include shell body 19 and set up in the cap 20 of shell body 19 both sides, one side of shell body 19 has set gradually laser instrument 21, diaphragm 22, detection room 23 and detection room, the slope is provided with reflecting plate 24 in the detection room, reflecting plate 24 will detection room partition forms extinction room 25 and installation room 26, be provided with photosensitive element 27 in the installation room 26, photosensitive element chooses photodiode for use, one side of detecting room 23 is provided with into smoke mouth 28 and outlet 29, the light beam that laser instrument 21 launched shines on extinction room 25's reflecting plate 24 after passing diaphragm 22, detection room 23. The photosensitive element is fixed on the chip and is arranged in a photosensitive inclined mode, and dust is not prone to being stained.

Furthermore, the included angle between the reflecting plate and the axis of the laser beam is 30-45 degrees.

Further, the other side of the housing body 19 is provided with a receiving cavity 31 for placing the circuit control board 30. And a first clamping groove matched with the circuit control board is arranged on the inner side wall of the accommodating cavity. This mode of setting, the use of reducible plug connector improves installation stability and assembly efficiency.

Further, the diaphragms 22 are three pieces and are parallel to each other. Three or more diaphragms are arranged, so that not only can the interference of astigmatism on measurement be reduced through filtering, but also the dust entering can be reduced, and the influence on the laser can be reduced.

Furthermore, the side wall of the installation chamber is provided with a second clamping groove for fixing the photosensitive element, so that the installation chamber is convenient to insert and fix, and the assembly efficiency is improved.

Further, a control panel is arranged on the front side of the housing.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A fire detection device comprises a shell (1), and is characterized in that a horizontal partition plate (2) is arranged in the shell (1), the horizontal partition plate (2) divides an inner cavity of the shell (1) into a device chamber at the upper side and a gas circulation chamber at the lower side, a suction fan (3) and a smoke detector (4) are arranged in the device chamber, and the gas circulation chamber is divided into a first air channel (7), a second air channel (8) and a third air channel (9) by arranging a first vertical partition plate (5) and a second vertical partition plate (6) in the gas circulation chamber;

an air suction opening is formed in the position, corresponding to the air suction fan (3), of the horizontal partition plate (2), and the air suction opening is partitioned by the first vertical partition plate (5) to form a first smoke suction opening (10) and a second smoke suction opening (11); a detection smoke inlet (12) and a detection smoke outlet (13) are formed in the position, corresponding to the smoke detector (4), on the partition plate; an air inlet (14) is formed in the side wall of one side of the shell (1), an air outlet (15) is formed in the side wall of the other side of the shell (1), and a circulating opening (16) is formed in the position, corresponding to the air outlet (15), of the horizontal partition plate (2); the air inlet (14) is communicated with the first smoke suction port (10) through a first air duct (7), the circulating port (16) is communicated with the detection smoke inlet (12) through a third air duct (9), and the detection smoke outlet (13) is communicated with the second smoke suction port (11) through a second air duct (8).

2. A fire detection device as claimed in claim 1, wherein the ratio of ventilation of the first (10) and second (11) ports is 4: 1.

3. A fire detection device as claimed in claim 1, wherein there are two of the air inlets (14), and a first air deflector (17) is provided at the air inlets (14).

4. A fire detection device as claimed in claim 1, wherein a second deflector (18) is provided at the air outlet (15), the second deflector (18) directing the smoke towards the circulation opening (16).

5. A fire detection device according to claim 1, wherein the smoke detector (4) comprises a casing body (19) and a casing cover (20) arranged on two sides of the casing body (19), a laser (21), a diaphragm (22), a detection chamber (23) and a detection chamber are arranged on one side of the casing body (19) in sequence, a reflecting plate (24) is obliquely arranged in the detection chamber, the detection chamber is divided by the reflecting plate (24) into a light extinction chamber (25) and an installation chamber (26), a photosensitive element (27) is arranged in the installation chamber (26), a smoke inlet (28) and a smoke outlet (29) are arranged on one side of the detection chamber (23), and a light beam emitted by the laser (21) passes through the diaphragm (22) and the detection chamber (23) and then strikes the reflecting plate (24) of the light extinction chamber (25).

6. A fire detection device as claimed in claim 5, characterised in that the other side of the housing body (19) is provided with a receiving cavity (31) in which the circuit control board (30) is located.

7. A fire detection device as claimed in claim 5, characterised in that the diaphragms (22) are three-piece and parallel to each other.