CN209947061U

CN209947061U - Photoelectric smoke detector

Info

Publication number: CN209947061U
Application number: CN201921000564.XU
Authority: CN
Inventors: 甄振龙; 冷文辉; 田云
Original assignee: Shenzhen Lang Xin Intelligent Technology Co Ltd
Current assignee: Shenzhen Lang Xin Intelligent Technology Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-01-14
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses a photoelectric smoke detector, which comprises a top base, a main shell, a circular iron sheet, a PCB mainboard, a PVC insulation sheet, a guide plate, a battery, a magnetic reed pipe, an alarm device, a key and a plurality of screws; the top placing base is provided with a plurality of through holes for fixing the top placing base to the wall body by screws; the bottom of the main shell is provided with a round opening, and the round iron sheet is embedded in the round opening of the main shell; PCB mainboard, PVC insulating piece, guide plate, battery, magnetic reed pipe, button and alarm device all install in the main casing, PVC insulating piece and guide plate pass through the screw fixation to the PCB mainboard on, battery, magnetic reed pipe, button and alarm device are fixed respectively to the bottom and the top of PCB mainboard. The utility model discloses a photoelectric smoke detector adopts unique structural design and optical signal processing technique, has functions such as dustproof, anti external light interference, has guaranteed the stability of product from the design.

Description

Photoelectric smoke detector

Technical Field

The utility model belongs to the technical field of the smog is surveyed, concretely relates to photoelectric type smoke detector.

Background

The smoke detector realizes fire prevention mainly by monitoring smoke concentration, the ion type smoke sensor is adopted in the smoke detector, the ion type smoke sensor is a sensor with advanced technology and stable and reliable work, is widely applied to various fire alarm systems, has far better performance than a gas-sensitive resistor type fire alarm, is mainly applied to fire protection systems, and also has application in security system construction. However, since the ion detector contains radioactive substances and is likely to leak and cause damage to the human body, a more safe and reliable photoelectric smoke detector is now required.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model provides a photoelectric smoke detector.

The technical scheme of the utility model is that:

a photoelectric smoke detector comprises a top base, a main shell, a circular iron sheet, a PCB main board, a PVC insulation sheet, a flow guide plate, a battery, a magnetic reed pipe, an alarm device and a key; the top placing base is provided with a plurality of through holes for fixing the top placing base to the wall body by screws; the bottom of the main shell is provided with a round opening, and the round iron sheet is embedded in the round opening of the main shell; the PCB main board, the PVC insulation sheet, the flow guide plate, the battery, the magnetic reed pipe, the key and the alarm device are all arranged in the main shell, and the PVC insulation sheet and the flow guide plate are fixed on the same side of the PCB main board, so that smoke can conveniently enter the detector to be detected; the battery, the magnetic reed pipe, the key and the alarm device are respectively fixed to the bottom and the top of the PCB mainboard; put top base and main casing body and pass through circular iron sheet and connect, and the main casing body can be on putting top base 360 degrees rotation adjustment positions of level.

Preferably, the top placing base comprises a top placing shell, a strong magnet and a silica gel pad, and the middle part of the top placing shell is provided with a plurality of through holes; the strong magnet is embedded in the through hole in the middle of the top placing shell, is used for connecting the top placing base and the main shell by matching with a circular iron sheet, and can also be used for controlling the magnetic reed pipe to conduct a battery; the silica gel pad is installed at one end close to the wall body and used for sealing the through hole in the middle of the top placing shell to protect strong magnetism.

Preferably, the top housing further has a protrusion corresponding to the circular opening of the main housing for positioning when the top base and the main housing are connected.

Preferably, the main housing comprises a face shell, a middle frame and a bottom shell, and an opening for placing a circular iron sheet is formed in the middle of the bottom shell; the inner wall of the middle frame is provided with a plurality of screw holes; the face shell is provided with a top column which is positioned right below the keys on the PCB mainboard; the face shell, the middle frame and the bottom shell are fixed through screws, springs are further sleeved on the screws between the face shell and the middle frame, and the face shell can be pressed after the screws are locked to control the keys through the ejection columns.

Preferably, the alarm device comprises a labyrinth assembly, a temperature sensing probe, a buzzer and an LED lamp, wherein the labyrinth assembly is mounted at the top of the PCB mainboard and is positioned in the guide plate, and comprises an optical labyrinth chamber, and a light emitting diode and a receiving diode which are arranged in the optical labyrinth chamber and are used for detecting the concentration of smoke; the temperature sensing probe is arranged at the bottom of the PCB mainboard and used for detecting the temperature of the surrounding environment; the buzzer is arranged at the bottom of the PCB mainboard and used for giving an alarm when abnormality is detected; the LED lamp is arranged at the bottom of the PCB mainboard and used for giving an alarm and displaying a working state.

Preferably, the bottom shell and the middle frame are further provided with a plurality of openings for allowing the buzzer to emit sound and the LED lamp to emit light.

Preferably, the face shell is further provided with a light guide column for amplifying light rays of the LED lamp.

Preferably, the PCB main board comprises a power module, an MCU main control module, a sensor module, a key control module, an LED display module, a buzzer control module and an RF wireless module, the MCU main control module is electrically connected to the power module, the sensor module, the LED display module, the buzzer control module and the RF wireless module, respectively, and the key control module is electrically connected to the power module and the RF wireless module.

Adopt the technical scheme of the utility model, following beneficial effect has: the photoelectric smoke detector of the utility model detects fire by adopting the principle that particles in smoke refract infrared light, the circuit mainly comprises an infrared transmitting part and a receiving part, a transmitting tube and a receiving tube are arranged in an optical labyrinth, the optical labyrinth can shield the interference of external stray light, but does not influence the smoke entering; the top base and the main shell are connected by strong magnetism and iron sheets, and are convenient to detach and mount.

Drawings

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

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic structural view of the present invention with the middle frame removed;

FIG. 4 is a schematic view of the structure of the face shell of the present invention;

fig. 5 is a schematic view of a partial structure of the present invention.

The attached drawings are marked as follows:

1. a top base; 2. a main housing; 3. a circular iron sheet; 4. a PCB main board; 5. PVC insulation sheets; 6. a baffle; 7. a battery; 8. a magnetic reed pipe; 9. an alarm device; 10. pressing a key; 11. a screw; 12. a spring; 13. a light guide pillar; 101. placing a top shell; 102. strong magnetism; 103. a silica gel pad; 104. a top pillar; 201. a face shell; 202. a middle frame; 203. a bottom case; 901. a labyrinth assembly; 902. a temperature sensing probe; 903. a buzzer; 904. an LED lamp.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 5, the utility model provides a photoelectric smoke detector, which comprises a top base 1, a main shell 2, a circular iron sheet 3, a PCB mainboard 4, a PVC insulation sheet 5, a guide plate 6, a battery 7, a magnetic reed pipe 8, an alarm device 9 and a key 10; the top base 1 is provided with a plurality of through holes for fixing the top base 1 to a wall body by screws 11; the bottom of the main shell 2 is provided with a round opening, and the round iron sheet 3 is embedded in the round opening of the main shell 2; the PCB mainboard 4, the PVC insulation sheet 5, the flow guide plate 6, the battery 7, the magnetic reed pipe 8, the key 10 and the alarm device 9 are all arranged in the main shell 2, and the PVC insulation sheet 5 and the flow guide plate 6 are fixed on the same side of the PCB mainboard, so that smoke can conveniently enter the detector to be detected; the battery 7, the magnetic reed pipe 8, the key 10 and the alarm device 9 are respectively fixed at the bottom and the top of the PCB mainboard 4; the top base 1 and the main casing 2 are connected through a circular iron sheet 3, and the main casing 2 can be horizontally rotated by 360 degrees on the top base 1 to adjust the position.

The top setting base 1 comprises a top setting shell 101, a strong magnet 102 and a silica gel pad 103, wherein the middle part of the top setting shell 101 is provided with a plurality of through holes; the strong magnet 102 is embedded in a through hole in the middle of the top housing 101, is used for connecting the top base 1 and the main housing 2 in cooperation with the circular iron sheet 3, and can also be used for controlling the reed switch 8 to conduct the battery 7; the silica gel pad 103 is installed at one end close to the wall body and used for sealing the through hole in the middle of the top housing 101 to protect the strong magnet 102.

The top housing 101 further has a protrusion 104 corresponding to the circular opening of the main housing for positioning when the top base 1 and the main housing 2 are connected.

The main shell 2 comprises a face shell 201, a middle frame 202 and a bottom shell 203, and an opening for placing the circular iron sheet 3 is formed in the middle of the bottom shell 203; a plurality of screw holes are formed in the inner wall of the middle frame 202; the face shell 201 is provided with a top column 204, and the top column 204 is positioned right below the key 10 on the PCB mainboard 4; the face shell 201, the middle frame 202 and the bottom shell 203 are fixed through screws 11, a spring 12 is further sleeved on the screw 11 between the face shell 201 and the middle frame 202, and the face shell 201 can be pressed after the screw 11 is locked to control the key through the top column 204. Preferably, the key control mode is as follows:

a. quick press (key press time less than 500 ms): awakening the product;

b. slow press (key press time greater than 500 ms, less than 1 second): the product is wirelessly matched;

c. long press (key press time greater than 2 seconds): and (5) product testing and alarming.

The alarm device 9 comprises a labyrinth assembly 901, a temperature sensing probe 902, a buzzer 903 and an LED lamp 904, wherein the labyrinth assembly 901 is installed at the top of the PCB mainboard 4 and is positioned in the guide plate 6, and the labyrinth assembly 901 comprises an optical labyrinth chamber, and a light emitting diode and a receiving diode which are arranged in the optical labyrinth chamber and are used for detecting the concentration of smoke; the temperature sensing probe 902 is mounted at the bottom of the PCB mainboard 4 and used for detecting the temperature of the surrounding environment; the buzzer 903 is mounted at the bottom of the PCB mainboard 4 and used for giving an alarm when abnormality is detected; the LED lamp 904 is installed at the bottom of the PCB main board 4 for alarming and displaying the working state.

The bottom case 203 and the middle frame 202 are also provided with a plurality of openings for the buzzer 903 to send out sound and the LED lamp 904 to send out light.

The face shell 201 is further provided with a light guide column 13 for amplifying light rays of the LED lamp 904.

PCB mainboard 4 includes power module, MCU host system, sensor module, button control module, LED display module, bee calling organ control module and RF wireless module, MCU host system respectively with power module, sensor module, LED display module, bee calling organ control module and RF wireless module electric connection, button control module and power module and RF wireless module electric connection.

The utility model discloses a circular iron sheet 3's diameter is greater than the size of trompil on the drain pan 203, puts strong magnetism 102 on the base 1 of pushing up and stretches into drain pan trompil department through the bellying 104 of putting on the shell 101 and hold circular iron sheet 3 in the main casing, and the main casing body 2 is accomplished to connect and the main casing body 2 can be followed and is put the rotation of bottom 1 seat with putting on the base 1.

The utility model discloses the theory of operation does: the photoelectric smoke detector of the utility model reflects infrared light by adopting the reflection principle of smoke particles. The main circuit comprises an MCU processing part, an infrared transmitting part and an infrared receiving part, wherein the transmitting and receiving diodes are arranged in the optical labyrinth chamber and can shield the interference of external stray light without influencing the smoke entering the detector; when no smoke exists at ordinary times, the received infrared signal is very weak, when smoke enters, due to the scattering effect, the received optical signal is enhanced, when the smoke concentration is accumulated to reach the MCU alarm threshold, the detector flashes the alarm indicator lamp to send out harsh alarm sound.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A photoelectric smoke detector, comprising: the device comprises a top setting base, a main shell, a circular iron sheet, a PCB main board, a PVC insulation sheet, a flow guide plate, a battery, a reed switch, an alarm device and a key; the top placing base is provided with a plurality of through holes for fixing the top placing base to the wall body by screws; the bottom of the main shell is provided with a round opening, and the round iron sheet is embedded in the round opening of the main shell; the PCB main board, the PVC insulation sheet, the flow guide plate, the battery, the magnetic reed pipe, the key and the alarm device are all arranged in the main shell, and the PVC insulation sheet and the flow guide plate are fixed on the same side of the PCB main board, so that smoke can conveniently enter the detector to be detected; the battery, the magnetic reed pipe, the key and the alarm device are respectively fixed to the bottom and the top of the PCB mainboard; put top base and main casing body and pass through circular iron sheet and connect, and the main casing body can be on putting top base 360 degrees rotation adjustment positions of level.

2. The photoelectric smoke detector of claim 1, wherein: the top placing base comprises a top placing shell, a strong magnet and a silica gel pad, and a plurality of through holes are formed in the middle of the top placing shell; the strong magnet is embedded in the through hole in the middle of the top placing shell, is used for connecting the top placing base and the main shell by matching with a circular iron sheet, and can also be used for controlling the magnetic reed pipe to conduct a battery; the silica gel pad is installed at one end close to the wall body and used for sealing the through hole in the middle of the top placing shell to protect strong magnetism.

3. The photoelectric smoke detector of claim 2, wherein: the top housing is also provided with a convex part corresponding to the circular hole of the main housing and used for positioning when the top base is connected with the main housing.

4. The photoelectric smoke detector of claim 1, wherein: the main shell comprises a face shell, a middle frame and a bottom shell, and an opening for placing a round iron sheet is formed in the middle of the bottom shell; the inner wall of the middle frame is provided with a plurality of screw holes; the face shell is provided with a top column which is positioned right below the keys on the PCB mainboard; the face shell, the middle frame and the bottom shell are fixed through screws, springs are further sleeved on the screws between the face shell and the middle frame, and the face shell can be pressed after the screws are locked to control the keys through the ejection columns.

5. The photoelectric smoke detector of claim 4, wherein: the alarm device comprises a labyrinth component, a temperature sensing probe, a buzzer and an LED lamp, wherein the labyrinth component is mounted at the top of the PCB mainboard and is positioned in the guide plate, and comprises an optical labyrinth chamber, and a light-emitting diode and a receiving diode which are arranged in the optical labyrinth chamber and are used for detecting the concentration of smoke; the temperature sensing probe is arranged at the bottom of the PCB mainboard and used for detecting the temperature of the surrounding environment; the buzzer is arranged at the bottom of the PCB mainboard and used for giving an alarm when abnormality is detected; the LED lamp is arranged at the bottom of the PCB mainboard and used for giving an alarm and displaying a working state.

6. The photoelectric smoke detector of claim 5, wherein: the bottom shell and the middle frame are also provided with a plurality of openings for the buzzer to send out sound and the LED lamp to send out light.

7. The photoelectric smoke detector of claim 5, wherein: the face shell is also provided with a light guide column for amplifying light rays of the LED lamp.

8. The photoelectric smoke detector of claim 1, wherein: the PCB mainboard comprises a power supply module, an MCU master control module, a sensor module, a key control module, an LED display module, a buzzer control module and an RF wireless module, wherein the MCU master control module is respectively electrically connected with the power supply module, the sensor module, the LED display module, the buzzer control module and the RF wireless module, and the key control module is electrically connected with the power supply module and the RF wireless module.