CN114241709B

CN114241709B - Hidden smoke detection structure

Info

Publication number: CN114241709B
Application number: CN202111525025.XA
Authority: CN
Inventors: 钟家运; 付鹏辉
Original assignee: Shenzhen Heiman Technology Co ltd
Current assignee: Shenzhen Heiman Technology Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2023-08-04
Anticipated expiration: 2041-12-14
Also published as: CN114241709A

Abstract

The application discloses a hidden smoke detection structure relates to the field of smoke sensors, and comprises a shell with a hollow inside, a fan assembly arranged in the shell, and a detection assembly arranged at one end, far away from the bottom surface of the shell, of the fan assembly; the bottom surface of the shell is provided with a plurality of smoke inlet holes, the fan assembly comprises a supporting cylinder arranged in the shell and a blowing fan arranged in the supporting cylinder, and the bottom surface of the supporting cylinder is provided with a barrier strip extending upwards; the detection assembly comprises a detection shell and a photoelectric detection unit arranged in the detection shell, wherein a shield is arranged on the outer wall of the detection shell, the side wall of the shield is of a hollow-out structure, the detection shell can be sealed at the upper end of the support cylinder when the detection assembly is arranged in the support cylinder, the lower bottom surface of the shield is abutted to the upper end surface of the barrier strip, and a gap exists between the shield and the inner wall of the support cylinder. The accuracy to smog monitoring can be improved to this application.

Description

Hidden smoke detection structure

Technical Field

The application relates to the technical field of smoke sensors, in particular to a hidden smoke detection structure.

Background

Currently, smoke sensors have very wide application in smoke detection, and smoke sensors detect the occurrence of fire mainly by the principle of photoelectric scattering and issue an alarm.

The related smoke sensor mainly comprises a shell with a hollow inside, the side wall of the shell is of a hollow structure, outside smoke can enter the shell, a photoelectric detection unit is arranged in the inner cavity of the shell, and the photoelectric detection unit can emit light rays and receive scattered light. When no smoke exists in the shell, the optical signals received by the photoelectric detection unit are small, and when the smoke enters the shell, the smoke can scatter light, so that the photoelectric detection unit can receive more optical signals. The greater the smoke concentration, the greater the intensity of the scattering, the stronger the signal detected by the photodetecting unit, and the system in the photodetecting unit is provided with a predetermined intensity value, and when the detected intensity value is greater than this value, an alarm is issued, so that the occurrence of fire can be judged by the detected signal intensity.

The smoke sensor is usually installed on the ceiling of a building, and due to uncertainty of the movement direction of smoke, insufficient smoke amount entering the smoke sensor can exist in a certain space, so that the accuracy of monitoring the fire situation by the smoke sensor is reduced, and there is room for improvement.

Disclosure of Invention

In order to improve the accuracy of monitoring to smog, this application provides a hidden smog detection structure.

The application provides a hidden smog detects structure, adopts following technical scheme:

a hidden smoke detection structure comprises a shell with a hollow inside, a fan assembly arranged in the shell, and a detection assembly arranged at one end of the fan assembly far away from the bottom surface of the shell; the bottom surface of the shell is provided with a plurality of smoke inlet holes, the fan assembly comprises a supporting cylinder arranged in the shell and a blowing fan arranged in the supporting cylinder, the bottom surface of the supporting cylinder is provided with a mounting groove penetrating through the inner side and the outer side of the supporting cylinder, the blowing fan is arranged in the mounting groove, and the bottom surface of the supporting cylinder is provided with a barrier strip extending upwards; the detection assembly comprises a detection shell and a photoelectric detection unit arranged in the detection shell, wherein a flow channel for smoke to enter and exit an inner cavity of the detection shell is arranged on the side wall of the detection shell, a shield is arranged on the outer wall of the detection shell, the side wall of the shield is of a hollowed-out structure, when the detection assembly is arranged in the supporting cylinder, the detection shell can be sealed at the upper end of the supporting cylinder, the lower bottom surface of the shield is abutted to the upper end surface of the barrier strip, and a gap exists between the shield and the inner wall of the supporting cylinder; the inner cavity of the supporting cylinder is divided into a smoke inlet cavity and a smoke outlet cavity by the barrier strips, the mounting groove is positioned in the smoke inlet cavity, a smoke outlet is formed in the side wall of the smoke outlet cavity, and a smoke outlet groove is formed in the position, corresponding to the smoke outlet, of the shell.

Through adopting above-mentioned technical scheme, outside smog can enter into the cigarette intracavity through advancing the cigarette hole, then enters into the detection shell from the clearance between guard shield and the support section of thick bamboo inner wall, installs photoelectric detection unit in the detection shell, can judge and carry out timely alarm to the condition of conflagration according to the concentration of smog. Can inhale the support section of thick bamboo with the environment of outside under blowing fan's effect to blow the smog to in the detection casing, because the rotational speed of fan is certain, consequently can make smog enter into the detection casing with certain speed, then detect the smog in the casing and enter into the play cigarette intracavity and discharge through play cigarette groove through the clearance between guard shield and the support section of thick bamboo inner wall, and under the effect of fan, can inhale the smog of outside into the cigarette intracavity, thereby reduced outside smog and did not enter into the detection casing and caused the condition of the conflagration that does not detect, thereby improved detection accuracy.

Optionally, the casing includes the face lid and installs the well shell on the face lid, go out the cigarette groove and offer on well shell, the face is covered and is provided with the extension section of thick bamboo that extends to the direction of keeping away from the fan subassembly, extension section of thick bamboo is inside hollow structure, advance the cigarette hole and offer on the lateral wall of extension section of thick bamboo.

Through adopting above-mentioned technical scheme, extend the section of thick bamboo and extend to the direction of keeping away from fan subassembly, when support cylinder installs on the casing for there is the clearance between extension cylinder and the fan, thereby make smog enter into extension cylinder inner chamber from advancing the cigarette hole more easily, and by the fan suction advance in the cigarette chamber.

Optionally, the support section of thick bamboo is provided with the ladder along in the junction of advance cigarette chamber and play cigarette chamber, the ladder along one side that keeps away from the support section of thick bamboo inner wall can the butt on the lateral wall of guard shield.

Through adopting above-mentioned technical scheme, the junction that advances the cigarette chamber and go out the cigarette chamber has the ladder to follow, and during the guard shield was installed in supporting the section of thick bamboo, the outer wall of guard shield can the butt on the lateral wall along the ladder to make the guard shield separate into cigarette chamber and play cigarette chamber, reduce smog and enter into out the cigarette chamber through the clearance between guard shield and the supporting the section of thick bamboo inner wall, thereby improve the precision that detects.

Optionally, the photoelectric detection unit is including having different detection wavelength's first detecting element and second detecting element, be provided with first installation piece and second installation piece in the detection shell, first detecting element installs in first installation piece, the second detecting element installs in the second installation piece, all seted up the light source hole on first installation piece and the second installation piece, the light source hole is towards the orientation slope setting that smog got into the detection shell to leave the space that is used for supplying smog to go out in the detection shell between first installation piece and the second installation piece.

By adopting the technical scheme, as the particles of the smoke and the water mist can diffusely reflect the light rays with different wavelengths, different particles can be detected through different wavelengths, and therefore misjudgment can be reduced.

Optionally, the flow channel includes a smoke inlet portion and a smoke outlet portion, the first detection unit and the second detection unit are located between the smoke inlet portion and the smoke outlet portion, the smoke inlet portion includes a first smoke inlet channel and a second smoke inlet channel, and a smoke inlet direction of the first smoke inlet channel is intersected with a smoke inlet direction of the second smoke inlet channel.

Through adopting above-mentioned technical scheme, advance cigarette portion and include first cigarette passageway and second and advance cigarette passageway to first cigarette passageway and second advance cigarette passageway advance cigarette direction crossing, two bundles of smog enter into and can collide then pass through between first detecting element and the second detecting element each other in the detection shell, thereby make smog can be detected with stable speed.

Optionally, be provided with the separate strip in the detection shell, separate strip is located between first installation piece and the second installation piece, separate strip lateral wall is close to the one side of light source hole and all is provided with the reflection of light face.

Through adopting above-mentioned technical scheme, under the effect of blocking light under the effect of dividing strip, can reduce the mutual interference of light between first detecting element and the second detecting element to stability when improving the detection.

Optionally, a slot is formed on one side of the separation strip away from the smoke outlet part.

Through adopting above-mentioned technical scheme, the air current can carry in the smog blows in the fluting and from the fluting back blowing back formation backward flow, consequently can reduce speed in the smog of fluting opening part for can detect smog more steadily when detecting.

Optionally, install out the cigarette piece on the lateral wall of play cigarette chamber, go out the cigarette mouth and open on going out the cigarette piece, go out the cigarette piece and keep away from the one end butt of supporting the section of thick bamboo on the inner wall of mesochite, go out the cigarette mouth and go out the cigarette groove and be linked together.

By adopting the technical scheme, the smoke is conveniently discharged from the smoke outlet groove.

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

1. the blowing fan can inhale smog and detect shell inner chamber to reduce because the condition that the inside is difficult to enter into of detection shell of reason smog in the position, improve the accuracy that detects.

Drawings

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

FIG. 2 is a schematic diagram of an exploded structure of an embodiment of the present application;

FIG. 3 is a schematic diagram of an exploded structure of a smoke inlet embodying an embodiment of the present application;

FIG. 4 is a schematic view of the connection of the support cylinder and the housing of the embodiment of the present application;

FIG. 5 is a schematic view of an exploded construction of the support cylinder and shield;

fig. 6 is a schematic diagram showing the internal structure of the detection case.

Reference numerals illustrate: 1. a housing; 101. a face cover; 102. a middle shell; 2. a fan assembly; 21. a blowing fan; 22. a support cylinder; 3. a detection assembly; 31. a detection shell; 32. a photodetecting unit; 321. a first detection unit; 322. a second detection unit; 4. a smoke inlet hole; 5. a mounting groove; 6. a barrier strip; 7. a shield; 8. a smoke inlet cavity; 9. a smoke outlet cavity; 10. a smoke outlet; 11. a smoke outlet groove; 12. a step edge; 13. a first mounting block; 14. a second mounting block; 15. a light source hole; 16. a smoke inlet part; 161. a first smoke inlet channel; 162. a second smoke inlet channel; 17. a smoke outlet part; 18. a first profiled plate; 19. a second shaped plate; 20. an inclined plate; 23. a separator bar; 24. a reflective surface; 25. slotting; 26. discharging a tobacco block; 27. an extension cylinder.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-6.

The embodiment of the application discloses a hidden smoke detection structure. Referring to fig. 1 and 2, the smoke detection structure comprises a housing 1, a fan assembly 2 and a detection assembly 3. The casing 1 is hollow structure and the bottom surface of casing 1 has seted up into cigarette hole 4, and the inside and outside both sides of casing 1 are link up to advance cigarette hole 4, and fan unit 2 and detection component 3 are installed in casing 1, and fan unit 2 is arranged in inhaling the casing 1 with the smog in the external environment, and detection component 3 is arranged in detecting the concentration of smog.

Referring to fig. 2 and 3, the fan assembly 2 includes a support cylinder 22 mounted in an inner cavity of the housing 1, the support cylinder 22 having an internal hollow structure, and the support cylinder 22 being mounted in the housing 1 by means of screws or the like. The bottom surface of the support cylinder 22 is provided with a mounting groove 5, and the mounting groove 5 penetrates through the inner side and the outer side of the support cylinder 22. The fan assembly 2 further comprises a blowing fan 21 mounted in the mounting groove 5. When the support cylinder 22 is installed in the housing 1, the installation groove 5 can be communicated with the smoke inlet 4, and when the blowing fan 21 rotates, smoke can be sucked into the inner cavity of the support cylinder 22 through the smoke inlet 4 and the installation groove 5. The blower fan 21 may be connected to an external power source or a battery may be installed in the housing 1 to supply power for rotation of the blower fan 21.

Referring to fig. 2 and 3, the housing 1 includes a cover 101 and a middle case 102 mounted on the cover 101 by means of screws or the like, the middle case 102 has a ring-shaped structure, and the fan assembly 2 and the detection assembly 3 are mounted in an inner cavity of the middle case 102. The side of the face cover 101 facing away from the middle shell 102 is provided with an extension cylinder 27, the extension cylinder 27 extends towards a direction away from the middle shell 102, the extension cylinder 27 is of an internal hollow structure, and the smoke inlet 4 is formed in the side wall of the extension cylinder 27. When the supporting cylinder 22 is installed in the shell 1, a certain gap exists between the installation groove 5 and the smoke inlet 4, so that the blowing fan 21 can more easily suck smoke into the inner cavity of the supporting cylinder 22. The middle shell 102 may be partially embedded into the ceiling during installation to enhance the concealment of the overall structure after installation.

Referring to fig. 2 and 4, the barrier rib 6 extending upward is installed on the bottom surface of the support cylinder 22, the installation groove 5 is located at one side of the barrier rib 6, i.e., the blowing fan 21 is located at one side of the barrier rib 6, the barrier rib 6 can divide the space in the support cylinder 22 into the smoke inlet chamber 8 and the smoke outlet chamber 9, and the blowing fan 21 is located in the smoke inlet chamber 8.

Referring to fig. 3 and 5, the detection assembly 3 includes a detection case 31 and a photo detection unit 32 mounted in the detection case 31, and a side wall of the detection case 31 is provided with a flow passage so that smoke can enter into the detection case 31 through the flow passage and also can escape out of the detection case 31 through the flow passage. The detection component 3 is arranged at one end of the support cylinder 22 far away from the face cover 101, the outer wall of the detection shell 31 is sleeved with the shield 7, the side wall of the shield 7 is of a hollowed-out structure, mosquitoes can be reduced from entering the detection shell 31, and the bottom surface of the shield 7 is of a solid structure. When the detection shell 31 is installed in the support cylinder 22, the bottom surface of the shield 7 can be abutted against the upper end surface of the barrier strip 6, a gap exists between the shield 7 and the inner wall of the support cylinder 22, and the upper end of the detection shell 31 is abutted against and sealed on the inner wall of the upper end of the support cylinder 22, so that smoke is sucked into the smoke cavity 8 by the blowing fan 21, enters the detection shell 31 body 1 from the smoke cavity 8, passes through the photoelectric detection unit 32, and then enters the smoke outlet cavity 9. Referring to fig. 1, a smoke outlet groove 11 is formed in the side wall of the middle case 102 corresponding to the smoke outlet chamber 9, and smoke which comes out of the detection case 31 and enters the smoke outlet chamber 9 can be discharged through the smoke outlet groove 11.

Referring to fig. 1 and 5, in order to reduce the smoke entering the smoke chamber 8 from directly entering the smoke chamber 9, the inner wall of the support cylinder 22 is provided with a stepped edge 12 at the joint of the smoke chamber 8 and the smoke chamber 9, that is, the space from the smoke chamber 8 to the smoke chamber 9 is in a necking structure, and when the shield 7 is installed in the support cylinder 22, the side wall of the shield 7 can be abutted against the side wall of one end of the stepped edge 12, so that most smoke enters the detection shell 31 and then enters the smoke chamber 9, and the accuracy of detecting the smoke is improved. The side wall of the smoke outlet cavity 9 is provided with a smoke outlet block 26, the smoke outlet block 26 is of a hollow structure, one end of the smoke outlet block, which is far away from the supporting cylinder 22, is abutted against the inner wall of the middle shell 102, and the smoke outlet block 26 is communicated with the smoke outlet groove 11.

Referring to fig. 3 and 6, a first mounting block 13 and a second mounting block 14 are mounted on an inner top surface of the detection case 31, the photo detection unit 32 includes a first detection unit 321 and a second detection unit 322, the first detection unit 321 is mounted on the first mounting block 13, the second detection unit 322 is mounted on the second mounting block 14, and light source holes 15 for light to pass through are formed in the first mounting block 13 and the second mounting block 14. The first detection unit 321 can use red light, and the second detection unit 322 can use blue light, water mist, dust and other particulate matters which are relatively close to the wavelength of the red light, so that diffuse reflection effect on the red light is stronger, and reflection effect on the blue light is weaker; the smoke particles are closer to the wavelength of blue light, so that the smoke generated during fire has stronger reflection effect on blue light and weaker reflection effect on red light, and therefore, the fire or water mist can be judged by the intensity of red light signals and the intensity of blue light signals detected by the first detection unit 321 and the second detection unit 322, when the intensity of the received blue light signals is larger than that of the red light, the smoke particles are obtained, and when the intensity of the red light is larger than that of the blue light, the smoke particles are obtained.

Referring to fig. 5 and 6, the flow path includes the smoke inlet portion 16 and the smoke outlet portion 17, when the detection housing 31 is installed in the support cylinder 22, the smoke inlet portion 16 communicates with the smoke inlet chamber 8, and the smoke outlet portion 17 communicates with the smoke outlet chamber 9, so that smoke enters the smoke inlet chamber 8 and then enters the detection housing 31 through the smoke inlet portion 16. The first mounting block 13 and the second mounting block 14 are located between the smoke inlet portion 16 and the smoke outlet portion 17, the first mounting block 13 and the second mounting block 14 are inclined to the smoke inlet portion 16, that is, the light source holes of the first mounting block 13 and the second mounting block 14 are inclined towards the smoke inlet portion 16, so that light rays emitted by the first detection unit 321 and the second detection unit 322 can intersect, smoke can pass between the first mounting block 13 and the second mounting block 14, finally enter the smoke outlet cavity 9 from the smoke outlet portion 17 and are discharged from the smoke outlet groove 11. The smoke inlet portion 16 includes a first smoke inlet channel 161 and a second smoke inlet channel 162, and an opening of the first smoke inlet channel 161 and an opening of the second smoke inlet channel 162 are in a state of obliquely intersecting, that is, when smoke enters the detection housing 31 from the first smoke inlet channel 161 and the second smoke inlet channel 162, the smoke flow can collide and move in a direction of the smoke outlet portion 17.

Referring to fig. 5 and 6, the side wall of the detection case 31 includes a plurality of first shaped plates 18 and a plurality of second shaped plates 19, the first shaped plates 18 and the second shaped plates 19 are disposed at intervals along the circumference of the detection case 31, and a certain space exists between adjacent first shaped plates 18. The one end that first sketch plate 18 is close to the inner chamber of detecting shell 31 still is connected with inclined plate 20, and adjacent first sketch plate 18 forms first smoke inlet channel 161, and adjacent second sketch plate 19 forms second smoke inlet channel 162, and first sketch plate 18 and second sketch plate 19 all buckle and set up for smog when entering into the inner chamber of detecting shell 31, smog motion path need turn round and can enter into the inner chamber of detecting shell 31, thereby reduces the influence that the external light source led to the fact to the detection. In the absence of smoke, the inclined plate 20 is able to reflect the light source so that the light source is not received by the photo-detection unit 32 and also reduces interference with the light source itself.

Referring to fig. 6, a separation bar 23 is further installed at the inner top wall of the detection case 31, and the separation bar 23 is located between the first and second mounting blocks 13 and 14. The side of the separation bar 23 close to the first mounting block 13 and the second mounting block 14 are provided with reflecting surfaces 24, so that the light rays of the first detection unit 321 and the second detection unit 322 cannot interfere with each other under the light blocking effect of the separation bar 23. Further, the separation strip 23 is provided with the slot 25 on one side facing the smoke inlet 16, when the smoke inlet 16 enters the detecting shell 31, air flow can be blown into the slot 25 and flow back from the slot 25, so that the smoke flowing out of the slot 25 can collide with the blown smoke, and the light source holes 15 of the first mounting block 13 and the second mounting block 14 face the opening of the slot 25, namely the opening of the slot 25 is a detecting area, so that the speed of the smoke at the opening of the slot 25 can be reduced, and light can be better diffusely reflected.

The implementation principle of the hidden smoke detection structure in the embodiment of the application is as follows: under the action of the blowing fan 21, smoke sequentially enters the detection shell 31 through the smoke inlet hole 4, the smoke inlet cavity 8 and the smoke inlet part 16, passes through the first photoelectric detection unit 32 and the second photoelectric detection unit 32 at a stable speed, and different smoke particles can be identified by the first photoelectric detection unit 32 and the second photoelectric detection unit 32, so that false alarm is reduced, and then the smoke is discharged from the smoke outlet cavity 9 and the smoke outlet groove 11.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A hidden smoke detection structure, characterized in that: the device comprises a shell (1) with a hollow inside, a fan assembly (2) arranged in the shell (1), and a detection assembly (3) arranged at one end of the fan assembly (2) far away from the bottom surface of the shell (1); the bottom surface of the shell (1) is provided with a plurality of smoke inlet holes (4), the fan assembly (2) comprises a supporting cylinder (22) arranged in the shell (1) and a blowing fan (21) arranged in the supporting cylinder (22), the bottom surface of the supporting cylinder (22) is provided with a mounting groove (5) penetrating through the inner side and the outer side of the supporting cylinder (22), the blowing fan (21) is arranged in the mounting groove (5), and the bottom surface of the supporting cylinder (22) is provided with a barrier strip (6) extending upwards; the detection assembly (3) comprises a detection shell (31) and a photoelectric detection unit (32) arranged in the detection shell (31), a flow channel for smoke to enter and exit the inner cavity of the detection shell (31) is arranged on the side wall of the detection shell (31), a shield (7) is arranged on the outer wall of the detection shell (31), the side wall of the shield (7) is of a hollowed-out structure, when the detection assembly (3) is arranged in the support cylinder (22), the detection shell (31) can be sealed at the upper end of the support cylinder (22), the lower bottom surface of the shield (7) is abutted to the upper end surface of the barrier strip (6), and a gap exists between the shield (7) and the inner wall of the support cylinder (22); the inner cavity of the supporting cylinder (22) is divided into a smoke inlet cavity (8) and a smoke outlet cavity (9) by the barrier strip (6), the mounting groove (5) is positioned in the smoke inlet cavity (8), a smoke outlet (10) is formed in the side wall of the smoke outlet cavity (9), and a smoke outlet groove (11) is formed in the position, corresponding to the smoke outlet (10), of the shell (1);

the shell (1) comprises a face cover (101) and a middle shell (102) arranged on the face cover (101), the smoke outlet groove (11) is formed in the middle shell (102), an extension cylinder which extends towards a direction far away from the fan assembly (2) is arranged on the face cover (101), the extension cylinder is of an internal hollow structure, and the smoke inlet hole (4) is formed in the side wall of the extension cylinder;

the photoelectric detection unit (32) comprises a first detection unit (321) and a second detection unit (322) with different detection wavelengths, a first installation block (13) and a second installation block (14) are arranged in the detection shell (31), the first detection unit (321) is installed on the first installation block (13), the second detection unit (322) is installed on the second installation block (14), light source holes (15) are formed in the first installation block (13) and the second installation block (14), the light source holes (15) are obliquely arranged towards the direction that smoke enters the detection shell (31), and a space for the smoke to go out from the detection shell (31) is reserved between the first installation block (13) and the second installation block (14);

a separation strip (23) is arranged in the detection shell (31), the separation strip (23) is positioned between the first mounting block (13) and the second mounting block (14), and a reflecting surface (24) is arranged on one side, close to the light source hole (15), of the side wall of the separation strip (23); a slot (25) is formed in one side of the separation strip (23) away from the smoke outlet part (17).

2. A concealed smoke detection structure according to any one of claim 1 wherein: the support cylinder (22) is provided with a step edge (12) at the joint of the smoke inlet cavity (8) and the smoke outlet cavity (9), and one side, far away from the inner wall of the support cylinder (22), of the step edge (12) can be abutted to the side wall of the shield (7).

3. A concealed smoke detection structure as claimed in claim 2 wherein: the flow channel comprises a smoke inlet part (16) and a smoke outlet part (17), the first detection unit (321) and the second detection unit (322) are located between the smoke inlet part (16) and the smoke outlet part (17), the smoke inlet part (16) comprises a first smoke inlet channel (161) and a second smoke inlet channel (162), and the smoke inlet direction of the first smoke inlet channel (161) is intersected with the smoke inlet direction of the second smoke inlet channel (162).

4. A concealed smoke detection structure as claimed in claim 3 wherein: the side wall of the smoke outlet cavity (9) is provided with a smoke outlet block (26), the smoke outlet (10) is arranged on the smoke outlet block (26), one end, far away from the supporting cylinder (22), of the smoke outlet block (26) is abutted to the inner wall of the middle shell (102), and the smoke outlet (10) is communicated with the smoke outlet groove (11).