CN112071013A - Power supply smoke early warning system - Google Patents
Power supply smoke early warning system Download PDFInfo
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- CN112071013A CN112071013A CN202010940363.9A CN202010940363A CN112071013A CN 112071013 A CN112071013 A CN 112071013A CN 202010940363 A CN202010940363 A CN 202010940363A CN 112071013 A CN112071013 A CN 112071013A
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- mounting plate
- smoke
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- processor
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
A power supply smoke early warning system comprises a camera, an installation cover, a first installation plate, a fan, an alarm, an air duct, a ventilation hood, a smoke sensor, a second installation plate, a processor and a fixing frame; the cameras are arranged on the outer peripheral surface of the mounting cover, a plurality of cameras are uniformly arranged, and the plurality of cameras are radially distributed in the direction; the mounting cover is arranged at the bottom of the first mounting plate; the first mounting plate is of a disc structure, a plurality of through holes are uniformly arranged on the first mounting plate around the central shaft of the first mounting plate, and the through holes are positioned on the inner side of the air guide cylinder; the fans are arranged at the bottom of the first mounting plate, the blowing direction of the fans is upward, and the fans are uniformly arranged around the central shaft of the first mounting plate; the alarm sets up in first mounting panel bottom, and the alarm evenly is provided with a plurality ofly around first mounting panel center pin. The invention can carry out low-risk and high-risk graded alarm according to the smoke condition, avoids excessive alarm and avoids the waste of fire extinguishing materials on the premise of ensuring safety.
Description
Technical Field
The invention relates to the technical field of smoke early warning, in particular to a power supply smoke early warning system.
Background
The power supply system is a system which is composed of a power supply system and a power transmission and distribution system and is used for generating electric energy and supplying and conveying the electric energy to electric equipment, and the power supply system can be divided into radial, trunk line, ring type and two-end power supply type wiring systems according to the wiring arrangement mode of the system; according to the operation mode, the system can be divided into an open type wiring system and a closed type wiring system; the system can be divided into a non-standby system and a standby system according to the requirement on the reliability of the load power supply. In a standby wiring system, when one circuit fails, the rest circuits can ensure that all power supplies become a complete standby system; if only power supply to important users can be guaranteed, the system becomes an incomplete standby system. The standby system can be put into a manual mode, an automatic mode, a frequent mode and the like. Smoke early warning is needed in a power supply system to provide buffer time for personnel evacuation and equipment protection.
The existing smoke early warning mode generally alarms by arranging a smoke sensor, but when the smoke early warning mode is used, the smoke sensor can only set an alarm threshold value, and when the smoke degree reaches the threshold value, the smoke sensor alarms; however, when the smoke is caused by human errors, such as smoking or lighting objects by human errors, the above situations are all manually controllable, but the smoke sensor can detect the smoke to give an alarm, trigger the action of the fire extinguishing system, cause excessive alarm and cause the waste of fire extinguishing materials.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides a power supply smoke early warning system which can perform low-risk and high-risk graded alarm according to smoke conditions, avoid excessive alarm and avoid waste of fire extinguishing materials on the premise of ensuring safety.
(II) technical scheme
The invention provides a power supply smoke early warning system which comprises a camera, an installation cover, a first installation plate, a fan, an alarm, an air guide cylinder, a ventilation hood, a smoke sensor, a second installation plate, a processor and a fixing frame, wherein the camera is arranged on the installation cover;
the cameras are arranged on the outer peripheral surface of the mounting cover, a plurality of cameras are uniformly arranged, and the plurality of cameras are radially distributed in the direction; the mounting cover is arranged at the bottom of the first mounting plate; the first mounting plate is of a disc structure, a plurality of through holes are uniformly arranged on the first mounting plate around the central shaft of the first mounting plate, and the through holes are positioned on the inner side of the air guide cylinder; the fans are arranged at the bottom of the first mounting plate, the blowing direction of the fans is upward, the fans are uniformly arranged around the central shaft of the first mounting plate, and the fans are positioned at the through holes; the alarm is arranged at the bottom of the first mounting plate, and a plurality of alarms are uniformly arranged around the central shaft of the first mounting plate; the fans and the alarms are arranged in a staggered mode; the air duct is of a rotary structure, the inner diameter of the air duct is gradually reduced from bottom to top, and the bottom end of the air duct is connected with the first mounting plate; the ventilation hood is communicated in the vertical direction and is of a rotary structure, a plurality of ventilation barrier channels are uniformly arranged on the outer peripheral surface of the ventilation hood around the central shaft of the ventilation hood, the bottom end of the ventilation hood is communicated with the top end of the air guide cylinder, and the top end of the ventilation hood is connected with the bottom of the second mounting plate; the smoke sensor is arranged at the bottom of the second mounting plate and is positioned on the inner side of the ventilation hood; the processor is arranged on the top of the second mounting plate; the top end of the second mounting plate is connected with the bottom end of the fixing frame; the fixing frame is of a rotary structure, and an installation cavity is arranged on the inner side of the fixing frame; the camera and the smoke sensor are in communication connection with the processor, and the processor is in control connection with the fan and the alarm respectively.
Preferably, the bottom of the first mounting plate is connected with a transparent cover, and the transparent cover is positioned on the outer periphery of the mounting cover.
Preferably, the mounting cover and the transparent cover are both of hemispherical cover body structures; the first mounting plate bottom surface is provided with the first mounting groove that is used for imbedding the installation cover top to and be used for imbedding the second mounting groove at translucent cover top.
Preferably, the first mounting plate is connected with the mounting cover and the transparent cover through bolts; the second mounting plate is connected with the fixing frame through bolts.
Preferably, the bottom of the first mounting plate is provided with a power supply; the power is located the installation cover inboard, and power and camera, fan, alarm, smoke sensor and treater electric connection respectively.
Preferably, boss portion is provided with at the second mounting panel top, and boss portion is annular boss structure, and boss portion outer peripheral face is the inclined plane, and outer peripheral face internal diameter from top to bottom crescent, and boss portion sets up with the mount is coaxial, boss portion outer peripheral face bottom and mount inner peripheral face bottom contact.
Preferably, a groove is coaxially arranged on the inner side of the boss part; the processor is positioned at the inner side of the groove; the bottom surface of the second mounting plate is provided with a third mounting groove used for being embedded into the top of the ventilation hood.
Preferably, the camera comprises a common camera and an infrared camera.
Preferably, the operation steps of the system are as follows:
s1, the multiple cameras comprehensively collect common images and infrared images of the monitored area, and when the cameras collect the infrared images of smoke, the cameras send data to the processor;
s2, controlling the fan to start by the processor, blowing air upwards by the fan, generating air negative pressure in the air guide cylinder, and blowing smoke to the smoke sensor through the fan, the through hole, the air guide cylinder and the ventilation barrier channel;
s3, detecting the concentration of the smoke by the smoke sensor, and transmitting the detection result to the processor;
s4, when the processor classifies the smoke concentration according to low risk and high risk, the processor controls the alarm to give an alarm; the audible and visual alarm degree of the alarm is low under the low risk smoke concentration; under the high risk concentration, the audible and visual alarm degree of the alarm is high, and the processor transmits a high risk early warning signal to the remote monitoring terminal at the same time.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
the invention can carry out low-risk and high-risk graded alarm according to the smoke condition, avoids excessive alarm and avoids the waste of fire extinguishing materials on the premise of ensuring safety. The system comprises a plurality of cameras, a processor, a plurality of fans, a through hole, an air guide cylinder and a ventilation barrier channel, wherein the cameras are used for acquiring comprehensive common images and infrared images of a monitored area and sending signals to the processor when monitoring the infrared situation of smoke, the processor controls the plurality of fans to start, so that the smoke can rapidly circulate to a smoke sensor through the through hole, the air guide cylinder and the ventilation barrier channel, the smoke sensor is used for detecting the smoke, the detection result is transmitted to the processor, and the processor judges that the smoke concentration is in a low risk situation or a high risk situation; under the condition of low risk, the processor controls the alarm to give an alarm to a lower degree, so that nearby personnel can notice the alarm signal but cannot trigger the fire extinguishing system; under the high risk condition, the processor controls the alarm to give an alarm to a higher degree, sends a signal to the remote monitoring terminal, and automatically controls the fire extinguishing system to start through the remote monitoring terminal, so that timely fire extinguishing treatment is carried out, and buffering time is provided for evacuation of people and protection of equipment.
Drawings
Fig. 1 is a schematic structural diagram of a power supply smoke early warning system provided by the present invention.
Fig. 2 is a structural sectional view of a power supply smoke early warning system provided by the invention.
Fig. 3 is an enlarged view of a structure at a in fig. 2.
Fig. 4 is an enlarged view of the structure at B in fig. 2.
Reference numerals: 1. a camera; 2. mounting a cover; 3. a transparent cover; 4. a power source; 5. a first mounting plate; 501. a through hole; 502. a first mounting groove; 503. a second mounting groove; 6. a fan; 7. an alarm; 8. an air duct; 9. a ventilation hood; 901. a ventilation barrier channel; 10. a smoke sensor; 11. a second mounting plate; 111. a boss portion; 1111. a bevel; 1112. a groove; 112. a third mounting groove; 12. a processor; 13. a fixing frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-4, the power supply smoke early warning system provided by the invention comprises a camera 1, an installation cover 2, a first installation plate 5, a fan 6, an alarm 7, an air duct 8, a ventilation cover 9, a smoke sensor 10, a second installation plate 11, a processor 12 and a fixed frame 13;
the cameras 1 are arranged on the outer peripheral surface of the mounting cover 2, a plurality of cameras 1 are uniformly arranged, and the plurality of cameras 1 are radially distributed in the direction; the mounting cover 2 is arranged at the bottom of the first mounting plate 5; the first mounting plate 5 is of a disc structure, through holes 501 are formed in the first mounting plate 5, a plurality of through holes 501 are uniformly formed in the first mounting plate 5 around the central axis, and the through holes 501 are located on the inner side of the air duct 8; the fans 6 are arranged at the bottom of the first mounting plate 5, the blowing direction of the fans 6 is upward, the fans 6 are uniformly arranged around the central axis of the first mounting plate 5, and the fans 6 are positioned at the through holes 501; the alarm 7 is arranged at the bottom of the first mounting plate 5, and a plurality of alarms 7 are uniformly arranged around the central shaft of the first mounting plate 5; the fans 6 and the alarms 7 are arranged in a staggered mode; the air duct 8 is of a rotary structure, the inner diameter of the air duct 8 is gradually reduced from bottom to top, and the bottom end of the air duct 8 is connected with the first mounting plate 5; the ventilation hood 9 is communicated in the vertical direction, the ventilation hood 9 is of a rotary structure, a plurality of ventilation fence passages 901 are arranged on the outer peripheral surface of the ventilation hood 9, the ventilation fence passages 901 are uniformly arranged around the central shaft of the ventilation hood 9, the bottom end of the ventilation hood 9 is communicated with the top end of the air guide duct 8, and the top end of the ventilation hood 9 is connected with the bottom of the second mounting plate 11; the smoke sensor 10 is arranged at the bottom of the second mounting plate 11, and the smoke sensor 10 is positioned on the inner side of the ventilation hood 9; the processor 12 is arranged on top of the second mounting plate 11; the top end of the second mounting plate 11 is connected with the bottom end of the fixing frame 13; the fixed frame 13 is a rotary structure, and an installation cavity is arranged on the inner side of the fixed frame 13; the camera 1 and the smoke sensor 10 are both in communication connection with the processor 12, and the processor 12 is respectively in control connection with the fan 6 and the alarm 7.
In an optional embodiment, the bottom of the first mounting plate 5 is connected with the transparent cover 3, the transparent cover 3 is located on the outer peripheral side of the mounting cover 2, and the transparent cover 3 can isolate and protect the camera 1 without interfering with the normal operation of the camera 1, so that dust accumulation of the camera 1 is prevented, and the image acquisition definition of the camera 1 is ensured.
In an alternative embodiment, the mounting cover 2 and the transparent cover 3 are both of a hemispherical cover body structure; the first mounting plate 5 is provided at a bottom surface thereof with a first mounting groove 502 for fitting into a top of the mounting cover 2, and a second mounting groove 503 for fitting into a top of the transparent cover 3.
It should be noted that, by providing the first mounting groove 502 and the second mounting groove 503, the mounting positioning of the mounting cover 2 and the transparent cover 3 is facilitated.
In an alternative embodiment, the first mounting plate 5 is bolted to both the mounting cup 2 and the transparent cup 3; the second mounting plate 11 is connected with the fixing frame 13 through bolts, the fixing frame 13 is mounted on a ceiling on the top of a wall in advance, and when the wall is overhauled, the second mounting plate 11 only needs to be dismounted from the fixing frame 13, so that frequent dismounting of the fixing frame 13 is avoided, and the damage to the ceiling caused by frequent dismounting is avoided.
In an alternative embodiment, the bottom of the first mounting plate 5 is provided with a power supply 4; the power 4 is located the installation cover 2 inboard, and power 4 and camera 1, fan 6, alarm 7, smoke sensor 10 and treater 12 electric connection respectively.
It should be noted that, when power is cut off due to an unexpected situation, the power supply 4 can play a role of standby power supply, so as to ensure normal operation of the system.
In an alternative embodiment, the top of the second mounting plate 11 is provided with a boss portion 111, the boss portion 111 is an annular boss structure, the outer peripheral surface of the boss portion 111 is an inclined surface, and the inner diameter of the outer peripheral surface gradually increases from top to bottom, the boss portion 111 is coaxially arranged with the fixed frame 13, and the bottom end of the outer peripheral surface of the boss portion 111 contacts the bottom end of the inner peripheral surface of the fixed frame 13, so as to facilitate the mounting and positioning of the second mounting plate 11.
In an alternative embodiment, the boss portion 111 is provided coaxially inside with a groove 1112; the processor 12 is positioned inside the groove 1112, so that the processor can be effectively protected; the bottom surface of the second mounting plate 11 is provided with a third mounting groove 112 for being embedded into the top of the ventilation hood 9, so that the mounting and positioning of the ventilation hood 9 are facilitated.
In an alternative embodiment, the camera 1 includes a normal camera and an infrared camera, and can collect normal images and infrared images.
In an alternative embodiment, the system operates as follows:
s1, the multiple cameras 1 comprehensively collect common images and infrared images of the monitored area, and when the cameras 1 collect infrared images of smoke, the cameras 1 send data to the processor 12;
s2, the processor 12 controls the fan 6 to start, the fan 6 blows air upwards, air negative pressure is generated in the air guide cylinder 8, and smoke is blown to the smoke sensor 10 through the fan 6, the through hole 501, the air guide cylinder 8 and the ventilation barrier channel 901;
s3, the smoke sensor 10 detects the concentration of smoke and transmits the detection result to the processor 12;
s4, when the processor 12 classifies the smoke concentration according to low risk and high risk, the processor 12 controls the alarm 7 to give an alarm; the audible and visual alarm degree of the alarm 7 is low under the low risk smoke concentration; under the high risk concentration, the audible and visual alarm degree of the alarm 7 is high, and the processor 12 transmits a high risk early warning signal to the remote monitoring terminal at the same time.
The invention can carry out low-risk and high-risk graded alarm according to the smoke condition, avoids excessive alarm and avoids the waste of fire extinguishing materials on the premise of ensuring safety. The multiple cameras 1 collect general images and infrared images comprehensively in a monitored area, and send signals to the processor 12 when monitoring smoke infrared conditions, the processor 12 controls the multiple fans 6 to be started, so that smoke can rapidly circulate to the smoke sensor 10 through the through hole 501, the air duct 8 and the ventilation barrier channel 901, the smoke sensor 10 is used for detecting the smoke, the detection result is transmitted to the processor 12, and the processor 12 judges that the smoke concentration is in a low risk condition or a high risk condition; in low risk situations, the processor 12 controls the alarm 7 to give a lower degree of alarm, so that nearby personnel notice the alarm signal, but do not trigger the fire extinguishing system; under the high risk condition, the processor 12 controls the alarm 7 to give an alarm to a higher degree, sends a signal to the remote monitoring terminal, and automatically controls the fire extinguishing system to start through the remote monitoring terminal, so that timely fire extinguishing treatment is carried out, and buffering time is provided for evacuation of people and protection of equipment.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A power supply smoke early warning system is characterized by comprising a camera (1), an installation cover (2), a first installation plate (5), a fan (6), an alarm (7), an air duct (8), a ventilation cover (9), a smoke sensor (10), a second installation plate (11), a processor (12) and a fixing frame (13);
the cameras (1) are arranged on the outer peripheral surface of the mounting cover (2), a plurality of cameras (1) are uniformly arranged, and the directions of the plurality of cameras (1) are distributed in a radial manner; the mounting cover (2) is arranged at the bottom of the first mounting plate (5); the first mounting plate (5) is of a disc structure, through holes (501) are formed in the first mounting plate (5), a plurality of through holes (501) are uniformly formed around the central shaft of the first mounting plate (5), and the through holes (501) are located on the inner side of the air guide cylinder (8); the fans (6) are arranged at the bottom of the first mounting plate (5), the blowing direction of the fans (6) is upward, the fans (6) are uniformly arranged around the central shaft of the first mounting plate (5), and the fans (6) are positioned at the through holes (501); the alarm devices (7) are arranged at the bottom of the first mounting plate (5), and a plurality of alarm devices (7) are uniformly arranged around the central shaft of the first mounting plate (5); the fans (6) and the alarms (7) are arranged in a staggered mode; the air duct (8) is of a rotary structure, the inner diameter of the air duct (8) is gradually reduced from bottom to top, and the bottom end of the air duct (8) is connected with the first mounting plate (5); the ventilation hood (9) is communicated in the vertical direction, the ventilation hood (9) is of a rotary structure, a plurality of ventilation fence passages (901) are arranged on the outer peripheral surface of the ventilation hood (9), the ventilation fence passages (901) are uniformly arranged around the central shaft of the ventilation hood (9), the bottom end of the ventilation hood (9) is communicated with the top end of the air guide cylinder (8), and the top end of the ventilation hood (9) is connected with the bottom of the second mounting plate (11); the smoke sensor (10) is arranged at the bottom of the second mounting plate (11), and the smoke sensor (10) is positioned on the inner side of the ventilation hood (9); the processor (12) is arranged on the top of the second mounting plate (11); the top end of the second mounting plate (11) is connected with the bottom end of the fixing frame (13); the fixing frame (13) is of a rotary structure, and an installation cavity is arranged on the inner side of the fixing frame (13); the camera (1) and the smoke sensor (10) are in communication connection with the processor (12), and the processor (12) is in control connection with the fan (6) and the alarm (7) respectively.
2. A power supply smoke early warning system according to claim 1, wherein a transparent cover (3) is connected to the bottom of the first mounting plate (5), and the transparent cover (3) is positioned on the outer periphery side of the mounting cover (2).
3. A powered smoke warning system according to claim 2, characterised in that the mounting cover (2) and the transparent cover (3) are both of hemispherical cover construction; the bottom surface of the first mounting plate (5) is provided with a first mounting groove (502) for embedding the top of the mounting cover (2) and a second mounting groove (503) for embedding the top of the transparent cover (3).
4. A powered smoke warning system according to claim 3, characterised in that the first mounting plate (5) is bolted to both the mounting cup (2) and the transparent cup (3); the second mounting plate (11) is connected with the fixed frame (13) through bolts.
5. A powered smoke warning system according to claim 1, characterised in that the first mounting plate (5) is provided with a power source (4) at the bottom; the power supply (4) is located on the inner side of the mounting cover (2), and the power supply (4) is electrically connected with the camera (1), the fan (6), the alarm (7), the smoke sensor (10) and the processor (12) respectively.
6. A power supply smoke early warning system according to claim 1, wherein the second mounting plate (11) is provided with a boss portion (111) at the top, the boss portion (111) is an annular boss structure, the outer peripheral surface of the boss portion (111) is an inclined surface, the inner diameter of the outer peripheral surface is gradually increased from top to bottom, the boss portion (111) is coaxially arranged with the fixed frame (13), and the bottom end of the outer peripheral surface of the boss portion (111) is in contact with the bottom end of the inner peripheral surface of the fixed frame (13).
7. A powered smoke warning system according to claim 6, characterised in that the inside of the boss (111) is coaxially provided with a groove (1112); the processor (12) is positioned inside the groove (1112); the bottom surface of the second mounting plate (11) is provided with a third mounting groove (112) which is used for being embedded into the top of the ventilation hood (9).
8. A powered smoke warning system according to claim 1, characterised in that the camera (1) comprises a normal camera and an infrared camera.
9. A powered smoke warning system according to claim 8 and operating as follows:
s1, the multiple cameras (1) comprehensively collect common images and infrared images of the monitored area, and when the cameras (1) collect infrared images of smoke, the cameras (1) send data to the processor (12);
s2, the processor (12) controls the fan (6) to start, the fan (6) blows air upwards, air negative pressure is generated in the air guide cylinder (8), and smoke is blown to the smoke sensor (10) through the fan (6), the through hole (501), the air guide cylinder (8) and the ventilation barrier channel (901);
s3, detecting the concentration of smoke by the smoke sensor (10) and transmitting the detection result to the processor (12);
s4, when the processor (12) classifies the smoke concentration according to low risk and high risk, the processor (12) controls the alarm (7) to give an alarm; the audible and visual alarm degree of the alarm (7) is low under the low risk smoke concentration; under the high risk concentration, the audible and visual alarm degree of the alarm (7) is high, and the processor (12) transmits a high risk early warning signal to the remote monitoring terminal at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940363.9A CN112071013A (en) | 2020-09-09 | 2020-09-09 | Power supply smoke early warning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940363.9A CN112071013A (en) | 2020-09-09 | 2020-09-09 | Power supply smoke early warning system |
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| CN112071013A true CN112071013A (en) | 2020-12-11 |
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| CN202010940363.9A Pending CN112071013A (en) | 2020-09-09 | 2020-09-09 | Power supply smoke early warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113781738A (en) * | 2021-09-27 | 2021-12-10 | 深圳惠安天下电气消防科技有限公司 | Wireless transmission smoke detection alarm device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113781738A (en) * | 2021-09-27 | 2021-12-10 | 深圳惠安天下电气消防科技有限公司 | Wireless transmission smoke detection alarm device |
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