CN114067521A

CN114067521A - Detection device and fire extinguishing system

Info

Publication number: CN114067521A
Application number: CN202111539474.XA
Authority: CN
Inventors: 刘秀华; 李飞
Original assignee: Zephyr Intelligent System Shanghai Co Ltd
Current assignee: Zephyr Intelligent System Shanghai Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-02-18

Abstract

The invention discloses a detection device which comprises a shell, a power piece, a smoke sensor and a camera module. The shell is provided with an installation cavity, an air inlet channel, an air outlet hole and a camera hole, and the air inlet channel, the air outlet hole and the camera hole are all communicated with the installation cavity; the power piece is arranged in the air inlet channel and used for guiding outside air to enter the installation cavity; smoke transducer set up in the installation intracavity, the module of making a video recording is connected in the shell, just the module of making a video recording includes the camera, the camera set up in camera hole department for make a video recording to the external world. When the conflagration breaing out, a large amount of smog are produced in the conflagration, and smog is followed the air and is got into the installation intracavity by the power part guide, and smoke transducer in the installation intracavity detects smog, and the camera of module of making a video recording can make a video recording to the external world moreover, can survey the conflagration equally, has improved the accuracy of surveying, and then has improved detection device's reliability. The invention also relates to a fire extinguishing system.

Description

Detection device and fire extinguishing system

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to a detection device and a fire extinguishing system.

Background

Along with the development of science and technology in China, more and more fire hazards are generated in industrial production and daily life of people, and in order to discover and report fire at an early stage, crisis caused by fire can be effectively prevented and reduced, and personal and property safety is protected. Smoke sensors are becoming more and more important as a ring in the field of fire safety. However, the smoke sensor is adopted to act on fire detection alone, so that the situation that the smoke sensor cannot detect the fire easily occurs, and the reliability is low.

Disclosure of Invention

The invention aims to provide a detection device and a fire extinguishing system which can ensure the detection of a fire and improve the reliability.

A probe apparatus, comprising:

the shell is provided with a mounting cavity, an air inlet channel, an air outlet hole and a camera hole, and the air inlet channel, the air outlet hole and the camera hole are all communicated with the mounting cavity;

the power piece is arranged in the air inlet channel and used for guiding outside air to enter the installation cavity;

the smoke sensor is arranged in the mounting cavity; and

the camera shooting module is arranged in the installation cavity and comprises a camera, and the camera is arranged at the camera shooting hole and used for shooting the outside.

Through setting up foretell detecting device, place detecting device in predetermined position, then open the power spare, when the conflagration breaing out, the conflagration produces a large amount of smog, and smog is followed the air and is got into the installation intracavity by the power spare guide, and smoke transducer in the installation intracavity detects smog, and the camera of the module of making a video recording can make a video recording to the external world moreover, can survey the conflagration equally. Smoke transducer combines together with the module of making a video recording to survey the conflagration jointly, improved the accuracy of surveying, and then improved detection device's reliability.

In addition, gas passes through the exhaust hole after getting into the installation cavity and discharges for the gas and the external world of installation intracavity circulate, thereby dispel the heat to the module of making a video recording of installation intracavity.

In one embodiment, the detection device further includes a first filter element disposed in the air inlet passage and located on a side of the power element away from the smoke sensor.

In one embodiment, the housing further defines an air outlet communicating with the air inlet channel, the detecting device further includes a second filter disposed in the air inlet channel, the second filter is located on a side of the power member close to the smoke sensor, and the air outlet is located between the power member and the second filter.

In one embodiment, the detecting device further comprises a wind speed detector, which is arranged in the installation cavity and is used for detecting the airflow speed in the installation cavity.

In one embodiment, the detection device further includes a flow guide member, the flow guide member is disposed in the mounting cavity and has a flow guide channel and a flow guide surface, the flow guide channel is simultaneously communicated with the air inlet channel and the smoke sensor, and the flow guide surface is used for guiding the air entering from the air inlet channel to flow to the camera module.

In one embodiment, the detecting device further comprises a third filter member disposed in the flow guide channel.

In one embodiment, the smoke sensor comprises a shell, an emitting piece and a receiving piece, the shell is provided with a darkroom, a noise reduction channel, a receiving cavity, an air inlet and an air outlet, the darkroom is communicated with the air inlet and the air outlet at the same time, the air inlet is communicated with the air inlet channel, the air outlet is communicated with the mounting cavity, the emitting piece is arranged in the darkroom and used for generating detection light, one end of the noise reduction channel is communicated with the darkroom, the other end of the noise reduction channel is communicated with the receiving cavity, and the receiving piece is arranged in the receiving cavity and used for receiving the detection light.

In one embodiment, the smoke sensor further comprises a lens, and the lens is arranged in the noise reduction channel and used for focusing the detection light entering the noise reduction channel.

In one embodiment, the detection device further comprises a pressure detector and a gas detector, and the pressure detector and the gas detector are both arranged in the installation cavity.

A fire suppression system comprising a detection device as described above.

Drawings

Fig. 1 is a schematic structural diagram of a detection apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic bottom view of the detecting device shown in FIG. 1;

FIG. 3 is a schematic view of the probe apparatus shown in FIG. 1 at another angle;

FIG. 4 is a schematic cross-sectional view taken along line A-A of the probe apparatus shown in FIG. 1;

FIG. 5 is a schematic structural view of a portion of the components of the probe apparatus shown in FIG. 1;

FIG. 6 is a schematic structural view of another part of the components of the probe apparatus shown in FIG. 1;

FIG. 7 is a schematic structural diagram of a control board and components on the control board in the detecting device shown in FIG. 1;

FIG. 8 is a schematic structural view of a camera module of the detecting device shown in FIG. 1 with the decorative plate removed;

fig. 9 is a schematic view of the camera module shown in fig. 8 with the decorative plate removed from the camera module at another angle.

Reference numerals:

100. a detection device; 10. a housing; 20. a power member; 30. a smoke sensor; 40. a camera module; 11. a mounting cavity; 12. an air intake passage; 13. an exhaust hole; 14. a camera hole; 41. a camera; 15. a bottom case; 16. an air intake hood; 17. an upper cover; 51. a first filter member; 18. an air outlet; 52. a second filter member; 521. a diversion trench; 61. a wind speed detector; 70. a flow guide member; 71. a flow guide channel; 72. a flow guide surface; 53. a third filter member; 31. a housing; 32. a launch member; 33. a receiver; 311. a darkroom; 312. a noise reduction channel; 313. a receiving cavity; 314. an air inlet; 315. an air outlet; 34. a lens; 35. a circuit board; 62. a pressure detector; 63. a gas detector; 64. a temperature detector; 65. a control panel; 66. a wireless connection module; 42. a connecting plate; 43. a first mounting plate; 44. a second mounting plate; 45. a light supplement lamp; 46. a decorative plate; 47. a heat sink.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 to 4, a detection device 100 according to an embodiment of the present invention includes a housing 10, a power component 20, a smoke sensor 30, and a camera module 40.

The housing 10 has a mounting chamber 11, and an intake passage 12, an exhaust hole 13, and a camera hole 14 communicating with the mounting chamber 11.

Power component 20 sets up in inlet channel 12 for guide external gas gets into installation cavity 11, and smoke transducer 30 sets up in installation cavity 11, is used for detecting smog, and module 40 sets up in installation cavity 11 of making a video recording, and module 40 of just making a video recording includes camera 41, and camera 41 sets up in the hole 14 department of making a video recording, is used for making a video recording to the external world.

Through setting up foretell detection device, place detection device in preset position, then open power component 20, when the conflagration breaing out, the conflagration produces a large amount of smog, and smog is followed the air and is guided by power component 20 and get into installation cavity 11 in, and smoke transducer 30 in the installation cavity 11 detects smog, and camera 41 of module 40 of making a video recording can make a video recording to the external world moreover, can detect the conflagration equally. The smoke sensor 30 and the camera module 40 are combined to detect a fire together, so that the detection accuracy is improved, and the reliability of the detection device is improved.

In addition, gas passes through exhaust hole 13 after getting into installation cavity 11 and discharges for the gas in installation cavity 11 circulates with the external world, thereby dispels the heat to the module 40 of making a video recording in the installation cavity 11.

In this embodiment, the detection device is disposed in the battery box. However, in other embodiments, the detection device may be placed in other locations.

In some embodiments, the installation cavity 11 includes an upper space and a lower space, both of which are communicated with the air inlet channel 12, the smoke sensor 30 is disposed in the upper space, the camera module 40 is disposed in the lower space, and the exhaust hole 13 is communicated with the lower space.

In the present embodiment, the upper space and the lower space are divided by the space where the smoke sensor 30 and the camera module 40 are located, so as to facilitate understanding.

In some embodiments, the housing 10 includes a bottom shell 15, an air intake cover 16 and an upper cover 17, the bottom shell 15 has an air outlet 13 and a camera hole 14, the air intake cover 16 is connected to the bottom shell 15 to form the air intake channel 12 with the bottom shell 15, and the upper cover 17 is connected to the bottom shell 15 to form the mounting cavity 11 with the bottom shell 15.

In practical applications, the bottom casing 15 is provided with a plurality of air vents 13, the plurality of air vents 13 are located at the bottom of the bottom casing 15, and the upper cover 17 is connected to the top of the bottom casing 15.

In some embodiments, the power member 20 is a fan.

In some embodiments, the detecting device further includes a first filtering member 51, the first filtering member 51 is disposed in the air inlet channel 12 and located on a side of the power member 20 away from the smoke sensor 30, that is, located at the air inlet end of the air inlet channel 12, and is used for filtering the air entering the air inlet channel 12, and preventing large particles such as dust from entering, that is, preventing the dust from affecting the power member 20, the smoke sensor 30, the camera module 40, and the like.

In some embodiments, the housing 10 further defines an air outlet 18 communicating with the air inlet channel 12, the detecting device further includes a second filter 52, the second filter 52 is disposed in the air inlet channel 12, the second filter 52 is located on a side of the power element 20 close to the smoke sensor 30, and the air outlet 18 is located between the power element 20 and the second filter 52.

Therefore, the second filter element 52 can filter dust with large particles, the filtering effect of the second filter element 52 is better than that of the first filter element 51, so as to prevent dust from entering the installation cavity 11 to affect the smoke sensor 30 and the camera module 40, and small particles such as smoke can enter the installation cavity 11 through the first filter element 51 and the second filter element 52, so that the detection of the smoke sensor 30 is not affected.

In addition, the second filter element 52 has a blocking effect on the gas, so that when the gas flow guided by the power element 20 is larger than the gas flow that the second filter element 52 can pass through, the gas can be directly discharged through the air outlet 18, so that when the detecting device is placed in the closed space, the gas in the closed space is driven to flow, and when a fire occurs, the smoke can rapidly flow to the position where the detecting device is located, so that the detection speed is increased.

In practical applications, a flow guide groove 521 is formed on a side of the second filter element 52 facing the power element 20, and the flow guide groove 521 corresponds to and communicates with the air outlet 18 to guide the blocked air flow to be discharged from the air outlet 18.

In some embodiments, the detecting device further comprises a wind speed detector 61, and the wind speed detector 61 is disposed in the installation cavity 11 and is used for detecting the speed of the airflow in the installation cavity 11. Thus, when the air flow velocity is too low, it can be judged that the first filter 51 has a large amount of foreign substances and needs to be replaced.

It should be noted that the first filter element 51 is located near the air inlet end of the air inlet passage 12 for easy replacement, and the second filter element 52 is also located for blocking most of the air flow in addition to filtering particles with a smaller diameter, so that most of the air flow is directly discharged from the air outlet 18, and therefore the second filter element 52 is replaced much less frequently than the first filter element 51.

In practical applications, the wind speed detector 61 is an anemometer.

In some embodiments, the detecting device further includes a guiding element 70, the guiding element 70 is disposed in the mounting cavity 11 and has a guiding channel 71 and a guiding surface 72, the guiding channel 71 is connected to the air inlet channel 12 and the smoke sensor 30 to guide the air entering from the air inlet channel 12 to the smoke sensor 30, and the guiding surface 72 is used to guide the air entering from the air inlet channel 12 to the camera module 40.

That is to say, the diversion piece 70 can divert the gas entering through the air inlet channel 12, and a part of the gas enters the smoke sensor 30, so that the smoke sensor 30 detects smoke, and another part of the gas directly flows to the camera module 40 in the installation cavity 11, and can dissipate the heat of the camera module 40 in the installation cavity 11.

In practical applications, the detecting device further includes a third filter 53, and the third filter 53 is disposed in the flow guiding passage 71 and is used for filtering the gas entering the smoke sensor 30.

It should be explained that, in this embodiment, only set up the third filter piece 53 at water conservancy diversion passageway 71, can carry out a lot of filtration to the gas of entering smoke sensor 30, ensure the inside long-term cleanness of smoke sensor 30, but also can guarantee the air flow rate in the installation cavity 11, improve the radiating effect to the module 40 of making a video recording.

In some embodiments, the first filter 51, the second filter 52, and the third filter 53 are all foam.

Referring to fig. 5, in some embodiments, the smoke sensor 30 includes a housing 31, an emitting element 32 and a receiving element 33, the housing 31 has a dark room 311, a noise reduction channel 312, a receiving cavity 313, an air inlet 314 and an air outlet 315, the dark room 311 is communicated with the air inlet 314 and the air outlet 315, the air inlet 314 is communicated with the air inlet channel 12, the air outlet 315 is communicated with the mounting cavity 11, the emitting element 32 is disposed in the dark room 311 for generating the detecting light, one end of the noise reduction channel 312 is communicated with the dark room 311, the other end is communicated with the receiving cavity 313, and the receiving element 33 is disposed in the receiving cavity 313 for receiving the detecting light.

Normally, the detecting light generated by the emitting element 32 cannot be received by the receiving element 33 through the noise reducing passage 312 or only a small amount of the detecting light is received by the receiving element 33 through the noise reducing passage 312, and in case of fire, smoke enters the dark room 311 through the air inlet 314, the detecting light is scattered when passing through the smoke, and the scattered light is received by the receiving element 33 in the receiving cavity 313 behind the noise reducing passage 312, so that whether fire occurs can be judged according to the energy change of the light received by the detecting receiving element 33.

In addition, the air enters the darkroom 311 from the air inlet 314 and then is exhausted from the air outlet 315 into the installation cavity 11, and the air entering the installation cavity 11 can also dissipate heat along with the camera module 40 and is finally exhausted from the exhaust hole 13.

It should be noted that the longer the length of the noise reduction channel 312, the better the noise reduction effect. The noise reduction passage 312 serves to prevent the detection light from being received by the receiving member 33 as much as possible without smoke.

The emission direction of the detection light is at an angle to the extending direction of the noise reduction channel 312, and the emitting member 32 is spaced from the noise reduction channel 312 in a direction perpendicular to the extending direction of the noise reduction channel 312 to prevent the detection light emitted from the emitting member 32 from directly passing through the noise reduction channel 312.

In practice, the emitter 32 includes a blue light emitting tube and an infrared light emitting tube. In this way, light of two wavelengths can be received by the two receiving elements 33, increasing the range of detection.

In some embodiments, the smoke sensor 30 further comprises a lens 34, and the lens 34 is disposed in the noise reducing channel 312 for focusing the light entering the noise reducing channel 312, thereby increasing the intensity of the light and ensuring the light is received by the receiving element 33.

It should be noted that the distance between the receiving element 33 and the lens 34 is the same as the focal length of the lens 34, so as to ensure that the detection light is focused on the receiving element 33 directly after passing through the lens 34.

In some embodiments, the smoke sensor 30 further comprises a circuit board 35, the circuit board 35 being attached to the outside of the housing 31 and being connected to the emitter element 32 and the receiver element 33.

Referring to fig. 7, in some embodiments, the detecting device further includes a pressure detector 62 and a gas detector 63, the pressure detector 62 and the gas detector 63 are disposed in the installation cavity 11, the pressure detector 62 is used for detecting pressure, and the gas detector 63 is used for detecting combustible gas such as carbon monoxide and hydrogen.

In some embodiments, the detecting device further includes a temperature detector 64, and the temperature detector 64 is disposed in the installation cavity 11 for detecting the temperature of the gas.

The pressure detector 62 is a pressure sensor, the gas detector 63 includes a carbon monoxide sensor and a hydrogen sensor, and the temperature detector 64 is a temperature sensor.

In some embodiments, the detecting device further includes a control board 65, the control board 65 is disposed in the installation cavity 11, the wind speed detector 61, the pressure detector 62, the gas detector 63, and the temperature detector 64 are disposed in the control board 65, and the camera module 40 and the circuit board 35 in the smoke sensor 30 are connected to the control board 65.

In practical applications, the control board 65 is provided with a wireless connection module 66, and the wireless connection module 66 is used for enabling the control board 65 to be wirelessly connected with an external device or network.

Specifically, the control panel 65 is connected to the deflector 70, and the smoke sensor 30 and the control panel 65 are respectively located at opposite sides of the deflector 70.

Referring to fig. 3, 8 and 9, in some embodiments, the camera module 40 further includes a connecting plate 42 and a first mounting plate 43, the connecting plate 42 is connected to the housing 10, the first mounting plate 43 is connected to the connecting plate 42, and the camera 41 is disposed on the first mounting plate 43.

In practical application, the camera module 40 includes two cameras 41 of visible light and thermal imaging, and the camera 41 of visible light is convenient direct observation, and the camera 41 of thermal imaging then can conveniently observe the temperature variation.

In some embodiments, the camera module 40 further includes a second mounting plate 44 and a light supplement lamp 45, the housing 10 further has a light supplement hole communicated with the mounting cavity 11, the second mounting plate 44 is connected to the connecting plate 42, the light supplement lamp 45 is disposed on the second mounting plate 44 and extends out of the light supplement hole, so as to supplement light for the camera 41.

It should be noted that the fill-in light 45 and the visible light camera 41 cooperate, and the fill-in light 45 increases the detection brightness for the visible light camera at night.

In practical applications, the camera module 40 further includes a decorative plate 46, and the decorative plate 46 is connected to the outer side of the housing 10 for shielding the light compensating hole.

It can be understood that the decorative plate 46 is used for covering the light supplement lamp 45, and the smoothness of the surface of the shell 10 is ensured, so that the whole body is more attractive, but the decorative plate 46 can be made of a light-transmitting material, and light generated by the light supplement lamp 45 can be ensured to pass through.

In some embodiments, the camera module 40 further includes a heat sink 47, and the heat sink 47 is disposed on the first mounting plate 43 for dissipating heat of the camera 41.

In practical application, the heat sink 47 is an aluminum sheet heat dissipation structure, and a heat sink 47 can be disposed for each camera 41 corresponding to the two cameras 41 for visible light and thermal imaging.

Referring to fig. 6, in some embodiments, the number of the camera modules 40 is three, three observation planes are provided at the outer side of the housing 10, an included angle between each two of the three observation planes is 120 degrees, the camera 41 and the light supplement lamp 45 of each camera module 40 extend out from a corresponding observation plane, and a shooting angle range of each camera 41 is at least 120 degrees, so as to ensure that the surrounding environment is observed by 360 degrees.

Of course, in other embodiments, the number of the camera modules 40 may be other, for example, two camera modules 40 or one camera module 40, when two camera modules 40 are adopted, the shooting angle direction of each camera module 40 is at least 180 degrees, and when one camera module 40 is adopted, the shooting angle range of the camera module 40 is 360 degrees.

In addition, it can be understood that, when there are at least two camera modules 40, corresponding camera holes 14 and light compensating holes are opened for each camera module 40.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A detection device, characterized in that, comprising:

a casing, which has an installation cavity, an air intake channel, an exhaust hole and a camera hole, and the air intake channel, the exhaust hole and the camera hole are all communicated with the installation cavity;

a power element, which is arranged in the air inlet channel and is used for guiding the air from the outside into the installation cavity;

a smoke sensor disposed in the installation cavity; and

The camera module is arranged in the installation cavity, and the camera module includes a camera, and the camera is arranged at the camera hole for taking pictures of the outside world.

2 . The detection device according to claim 1 , wherein the detection device further comprises a first filter element, the first filter element is disposed in the air intake passage, and is located on the power element away from the power element. 3 . One side of the smoke sensor.

3 . The detection device according to claim 1 , wherein the outer casing is further provided with an air outlet communicating with the air inlet passage, the detection device further comprises a second filter element, the second filter element It is arranged in the air intake passage, the second filter element is located on the side of the power element close to the smoke sensor, and the air outlet is located between the power element and the second filter element.

4 . The detection device according to claim 3 , wherein the detection device further comprises a wind speed detector, and the wind speed detector is arranged in the installation cavity and used to detect the air flow speed in the installation cavity. 5 . .

5 . The detection device according to claim 1 , wherein the detection device further comprises a flow guide member, the flow guide member is arranged in the installation cavity and has a flow guide channel and a flow guide surface, and the The guide channel is communicated with the air intake channel and the smoke sensor at the same time, and the guide surface is used to guide the gas entering the air intake channel to flow to the camera module.

6 . The detection device according to claim 5 , wherein the detection device further comprises a third filter element, and the third filter element is disposed in the flow guiding channel. 7 .

7 . The detection device according to claim 1 , wherein the smoke sensor comprises a casing, a transmitting part and a receiving part, and the casing has a dark room, a noise reduction channel, a receiving cavity, an air inlet and an air outlet. 8 . , the dark room is communicated with the air inlet and the air outlet at the same time, the air inlet is communicated with the air inlet passage, the air outlet is communicated with the installation cavity, and the emitting element is arranged on the A dark room is used for generating detection light, one end of the noise reduction channel is communicated with the dark room, and the other end is communicated with the receiving cavity. The receiving member is arranged in the receiving cavity and used for receiving the detection light.

8 . The detection device according to claim 7 , wherein the smoke sensor further comprises a lens, and the lens is disposed in the noise reduction channel and used to focus the detection light entering the noise reduction channel. 9 .

9 . The detection device according to claim 1 , wherein the detection device further comprises a pressure detector and a gas detector, and the pressure detector and the gas detector are both arranged in the installation cavity. 10 .

10. A fire extinguishing system, characterized by comprising the detection device according to any one of claims 1-9.