A smoke detector for fire protection and a false alarm adjustment system

Abstract

The present invention relates to the technical field of smoke sensors, and specifically relates to a smoke sensor for fire protection, which sequentially includes a mounting base, an upper housing, a circuit board, an inner housing, and a lower housing from top to bottom. An articulated seat is provided on the outer periphery of the mounting base, an assembly rod is provided on the articulated seat, and a blowing component is provided at the lower end of the assembly rod. Smoke inlet holes are evenly distributed on the side wall of the lower housing, a protective filter screen for enclosing the smoke inlet holes is provided in the inner cavity of the lower housing, and a labyrinth channel assembly is provided inside the inner circle of the protective filter screen. The labyrinth channel assembly includes multiple groups of fixed baffles, and auxiliary baffles and movable baffles are provided at the ends of each group of fixed baffles. This device can effectively improve the adaptability and accuracy of the smoke sensor, and better meet diverse monitoring requirements; a false alarm adjustment system for a smoke sensor for fire protection is also proposed, and this system can reduce the false alarm risk and improve the performance of the fire monitoring system.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke detectors, and particularly to a smoke detector for fire protection and a false alarm adjustment system. Background Art

[0002] With the continuous development of modern society and the improvement of people's safety awareness, fire safety has become an extremely important issue in people's daily lives. As one of the core components in the fire alarm system, the smoke detector plays an important role in monitoring and warning fires. However, most of the current smoke detectors on the market have false alarm problems during use, that is, the smoke detector may give false alarms due to environmental factors, equipment failures or inappropriate settings, bringing troubles to users and even affecting normal fire monitoring.

[0003] Traditional solutions mainly attempt to reduce false alarms by adjusting the sensitivity of the smoke detector. Although it can change the response threshold of the smoke detector to a certain extent, limited by the design and performance of the smoke detector itself, the adjustment range is limited and not flexible enough; and if the sensitivity of the smoke detector is adjusted too high, the risk of false alarms may increase, that is, the smoke detector will trigger the fire alarm signal too sensitively, affecting normal use; secondly, only adjusting the sensitivity of the smoke detector itself may not be able to effectively adapt to changing environmental factors such as air flow, humidity, temperature, etc., resulting in unstable monitoring performance during a real fire. Summary of the Invention

[0004] The purpose of the present invention is to provide a smoke detector for fire protection and a false alarm adjustment system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A smoke detector for fire protection includes, from top to bottom, a mounting base, an upper housing, a circuit board, an inner housing, and a lower housing. A plurality of hinge seats are fixedly arranged on the outer periphery of the mounting base. A set of assembly rods is arranged on each hinge seat. A slot is provided inside the lower end of each set of assembly rods, and a blowing component is arranged inside the slot. And a plurality of sets of assembly rods are driven by a first driving device and synchronously move up and down and deflect to adjust the blowing direction of the blowing component; A plurality of smoke inlet holes are evenly distributed on the side wall of the lower half of the lower housing. A protective filter screen for enclosing the smoke inlet holes is arranged inside the lower housing cavity. A labyrinth channel assembly is arranged inside the inner circle of the protective filter screen. The labyrinth channel assembly includes a plurality of fixed baffles distributed in a circular array. The lower ends of the plurality of fixed baffles are fixedly arranged on the inner bottom wall of the lower housing. The upper ends of the plurality of fixed baffles abut against the lower end surface of the inner housing. And an auxiliary baffle and a movable baffle are arranged at one end of each fixed baffle away from the protective filter screen. The plurality of movable baffles are driven by a second driving device and synchronously perform a 0-90° forward and reverse rotation movement to achieve the effect of increasing or decreasing the smoke intake inside the smoke detector.

[0006] Preferably, multiple groups of fixed baffles are distributed in an annular array. At one end of each group of fixed baffles close to the protective filter screen, a guiding strip is protruding, and a first bending angle is formed between the guiding strip and the fixed baffle. A second bending angle is provided in the middle of each group of fixed baffles. The auxiliary baffle is fixedly connected to the side wall of the fixed baffle, and a third bending angle is formed between the auxiliary baffle and the fixed baffle.

[0007] Preferably, the mounting base is connected to the upper shell through a detachable component, the upper shell is connected to the lower shell through a clamping component, a circuit board is fixedly arranged inside the upper shell, a detection component protrudes from the middle of the lower end face of the circuit board, the inner shell is clamped in the inner cavity of the lower shell, and a detection hole communicating with the lower shell is opened inside the inner shell, and the detection component extends into the detection hole.

[0008] Preferably, the blowing component includes a fan, the fan is controlled to rotate by a controller, a shielding plate for blocking the fan is in contact connection with the surface of the assembly rod, the shielding plate is installed on the outer wall of the upper shell in a limited sliding manner, an inclined slot is opened at the upper end of the shielding plate, and a longitudinal push rod is inserted in the inclined slot, and the longitudinal push rod is connected to a first driving device.

[0009] Preferably, the first driving device includes a slider, a transverse push rod, an arc-shaped inclined slot, a rotating ring, an external gear ring, a driving rack, a vertical block and an electric push rod. One end of the slider is installed on the assembly rod in a limited sliding manner, the other end of the slider is rotatably connected to a radial push bar, the longitudinal push rod is fixedly arranged on the outer wall of the radial push bar, and the end of the radial push bar far from the longitudinal push rod extends into the upper shell and is fixedly connected to the transverse push rod.

[0010] Preferably, the rotating ring is installed in the upper shell in a limited rotating manner, 4-8 groups of arc-shaped inclined slots distributed in an annular array are opened on the rotating ring, the transverse push rod is inserted in the arc-shaped inclined slot, an external gear ring is fixedly connected to the upper end face of the rotating ring, and the external gear ring is meshed with the driving rack.

[0011] Preferably, the driving rack is installed in the upper shell in a limited sliding manner, a vertical block is fixedly connected to the back of the driving rack, and the piston rod of the electric push rod extends outwards and is fixedly connected to the vertical block.

[0012] Preferably, the second driving device includes a central shaft, a cylindrical cam, a cylindrical pin, a longitudinal moving strip, a nut plate and a vertical screw rod. The vertical screw rod is driven by a micro motor and is installed in the lower shell in a limited rotating manner. An internal thread hole for accommodating the vertical screw rod is opened inside the nut plate, and both the longitudinal moving strip and the nut plate are installed in the lower shell in a limited sliding manner.

[0013] Preferably, one end of the longitudinal moving strip is fixedly connected to the nut plate, the other end of the longitudinal moving strip is fixedly connected to the cylindrical pin, the cylindrical pin is clamped in the curve groove of the cylindrical cam, the cylindrical cam is installed in the lower shell in a limited rotating manner and is fixedly connected to the central shaft, the central shaft is movably inserted on the fixed baffle, and the movable end of the movable baffle is fixedly sleeved on the central shaft.

[0014] A false alarm adjustment system for a smoke detector used in fire protection, including a main control module for overall control and parameter adjustment of the smoke detector module, including adjustment of sensitivity, setting of alarm thresholds, and control of other modules;

[0015] A battery for outputting a stable power supply;

[0016] A power management module for managing and protecting the battery, and at the same time providing a stable power output for the control circuit, monitoring and adjusting parameters of voltage and current;

[0017] A smoke detector module for monitoring the smoke concentration in the air, and including a sensor, a control circuit, and an alarm;

[0018] A data processing module for collecting, processing, and analyzing data on false alarms of the smoke detector module, real-time monitoring of the smoke concentration and environmental conditions, and controlling and adjusting the mechanical assistance module and the self-adjustment module;

[0019] A self-adjustment module for adjusting the sensitivity of the sensor itself;

[0020] A mechanical assistance adjustment module for adjusting environmental factors;

[0021] A buzzer for prompting or alarming;

[0022] An LED indicator for displaying changes in the smoke concentration;

[0023] Among them, the power management module is respectively connected to the main control module and the battery.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. By setting a blowing component and a labyrinth channel component to form a device for assisting mechanical adjustment of sensitivity, and cooperating with the parameter adjustment of the smoke detector itself, it can comprehensively consider surrounding environmental factors and directly affect the environment around the smoke detector, effectively diluting smoke or flue gas on the premise of ensuring the normal operation of the smoke detector, reducing the possibility of false alarms of the smoke detector, and improving the accuracy of the monitoring device.

[0026] 2. By setting a fan as an auxiliary adjustment means to help adjust the working conditions of the smoke detector, an appropriate wind speed can accelerate air flow and effectively dilute the smoke in the air, thereby reducing the sensitivity of the smoke detector; and by setting an inclined groove and a longitudinal push column to cooperate with each other, the horizontal driving force of the radial push bar can be converted into the up and down movement of the shutter, so as to achieve the purpose of moving away from or blocking the fan.

[0027] 3. By setting the slider, horizontal push rod, arc-shaped chute, rotating ring, external gear ring, driving rack and vertical block, the driving force of the electric push rod can be converted into the synchronous deflection movement of multiple groups of assembly rods, so as to adjust the blowing directions of multiple groups of fans, making the fans installed at appropriate positions away from the smoke sensor and the directions should be towards the smoke sensor. In this way, the fans can blow away the surrounding smoke or fumes, reducing the direct impact on the smoke sensor.

[0028] 4. Through the design of the central shaft, cylindrical cam, cylindrical pin, longitudinal moving bar, nut disc and vertical screw rod, the driving force of the micro motor can be converted into the synchronous rotation movement of multiple groups of movable baffles, so as to change the size of the included angle formed between the movable baffle and the fixed baffle, reducing the amount of smoke directly entering the smoke sensor and thus increasing the difficulty of false alarms. Brief Description of the Drawings

[0029] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the unfolded state of the assembly rod of the present invention.

[0031] Figure 3 It is a schematic diagram of the upper shell, inner shell and lower shell of the present invention cut open.

[0032] Figure 4 It is an exploded schematic diagram of the smoke sensor of the present invention.

[0033] Figure 5 It is an exploded schematic diagram of the smoke sensor of the present invention from another perspective.

[0034] Figure 6 It is a schematic diagram of the assembly rod and the first driving device of the present invention.

[0035] Figure 7 It is a partial schematic diagram of the first driving device of the present invention.

[0036] Figure 8 It is a schematic diagram of the inner shell and the lower shell of the present invention cut open.

[0037] Figure 9 It is a schematic diagram of the second driving device and the labyrinth channel assembly of the present invention.

[0038] Figure 10 It is a partial schematic diagram of the second driving device of the present invention.

[0039] Figure 11 It is a structural block diagram of the false alarm adjustment system of the present invention.

[0040] In the figure: mounting base 1, hinge seat 2, assembly rod 3, upper housing 4, circuit board 5, inner housing 6, lower housing 7, smoke inlet hole 8, protective filter screen 9, fan 10, baffle 11, inclined slot 12, longitudinal push column 13, radial push bar 14, slider 15, transverse push rod 16, arc inclined slot 17, rotating ring 18, external gear ring 19, driving rack 20, vertical block 21, electric push rod 22, fixed baffle 23, auxiliary baffle 24, movable baffle 25, central shaft 26, cylindrical cam 27, cylindrical pin 28, longitudinal moving strip 29, nut plate 30, vertical screw rod 31. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a smoke detector for fire protection, which successively includes a mounting base 1, an upper housing 4, a circuit board 5, an inner housing 6, and a lower housing 7 from top to bottom. A sensitivity adjustment button is also provided on the circuit board 5 to adjust the monitoring sensitivity of the device itself; a plurality of groups of hinge seats 2 are fixedly arranged on the outer periphery of the mounting base 1, and a set of assembly rods 3 are arranged on each group of hinge seats 2. A slot is provided inside the lower end of each group of assembly rods 3, and a blowing component is arranged inside the slot. The plurality of groups of assembly rods 3 are driven by a first driving device and synchronously perform up-and-down deflection movements to adjust the blowing direction of the blowing component; smoke inlet holes 8 are evenly distributed on the side wall of the lower half of the lower housing 7, and a protective filter screen 9 for enclosing the smoke inlet holes 8 is arranged inside the lower housing 7. A labyrinth channel component is arranged inside the inner circle of the protective filter screen 9. The labyrinth channel component includes a plurality of groups of fixed baffles 23 distributed in a circular array. The lower ends of the plurality of groups of fixed baffles 23 are fixedly arranged on the inner bottom wall of the lower housing 7, and the upper ends of the plurality of groups of fixed baffles 23 abut against the lower end face of the inner housing 6. An auxiliary baffle 24 and a movable baffle 25 are arranged at one end of each group of fixed baffles 23 away from the protective filter screen 9. The plurality of groups of movable baffles 25 are driven by a second driving device and synchronously perform 0-90° forward and reverse rotation movements to achieve the effect of increasing or decreasing the smoke intake inside the smoke detector.

[0043] Furthermore, the present invention forms a device for assisting mechanical adjustment of sensitivity by setting a blowing component and a labyrinth channel component, and in cooperation with the parameter adjustment of the smoke detector itself, can comprehensively consider the surrounding environmental factors and directly affect the environment around the smoke detector. On the premise of ensuring the normal operation of the smoke detector, it can effectively dilute the smoke or flue gas, reduce the possibility of false alarms of the smoke detector, and improve the accuracy of the monitoring device.

[0044] As Figure 9 shown, multiple groups of fixed baffles 23 are distributed in an annular array. At one end of each group of fixed baffles 23 close to the protective filter screen 9, a guiding strip is protrudingly arranged, and a first bending angle is formed between the guiding strip and the fixed baffle 23. A second bending angle is arranged in the middle of each group of fixed baffles 23. The auxiliary baffle 24 is fixedly connected to the side wall of the fixed baffle 23, and a third bending angle is formed between the auxiliary baffle 24 and the fixed baffle 23.

[0045] Furthermore, by arranging the fixed baffle 23, the guiding strip, the auxiliary baffle 24 and the movable baffle to form multiple bending angles, a labyrinth channel is constituted, which can guide and deflect the flue gas, prevent some smoke particles from directly entering the smoke detector, and reduce the possibility of false alarms.

[0046] As Figures 1 - 4 shown, the mounting base 1 is connected to the upper housing 4 through a detachable component, the upper housing 4 is connected to the lower housing 7 through a clamping component, a circuit board 5 is fixedly arranged inside the upper housing 4, a detection component protrudingly arranged in the middle of the lower end surface of the circuit board 5, the inner housing 6 is clamped in the inner cavity of the lower housing 7, a detection hole communicating with the lower housing 7 is opened inside the inner housing 6, and the detection component extends into the detection hole.

[0047] Specifically, during normal operation, the flue gas sequentially passes through the smoke inlet hole 8, the protective filter screen 9 and the labyrinth channel assembly, and finally enters the detection hole and is detected by the detection component.

[0048] As Figure 2 、 Figure 6 and Figure 7 shown, the blowing component includes a fan 10. The fan 10 is controlled by a controller to rotate. A shielding plate 11 that blocks the fan 10 is in contact connection with the surface of the assembly rod 3. The shielding plate 11 is installed on the outer wall of the upper housing 4 in a limited sliding manner. An inclined slot 12 is opened at the upper end of the shielding plate 11, and a longitudinal push post 13 is inserted into the inclined slot 12. The longitudinal push post 13 is connected to a first driving device.

[0049] Furthermore, by setting the fan 10 as an auxiliary adjustment means to help adjust the working conditions of the smoke detector, an appropriate wind speed can accelerate the air flow, effectively dilute the smoke in the air, and thus reduce the sensitivity of the smoke detector; by using the inclined slot 12 and the longitudinal push post 13 in cooperation, the horizontal driving force of the radial push bar 14 can be converted into the up-and-down movement of the shielding plate 11, so as to achieve the purpose of moving away from or shielding the fan 10.

[0050] As Figure 6 and Figure 7As shown in the figure, the first driving device includes a slider 15, a transverse push rod 16, an arc-shaped inclined groove 17, a rotating ring 18, an external gear ring 19, a driving rack 20, a vertical block 21, and an electric push rod 22. One end of the slider 15 is limit-slidably installed on the assembly rod 3, and the other end of the slider 15 is rotatably connected to the radial push bar 14. The longitudinal push column 13 is fixedly arranged on the outer wall of the radial push bar 14. The end of the radial push bar 14 away from the longitudinal push column 13 extends into the upper housing 4 and is fixedly connected to the transverse push rod 16.

[0051] Furthermore, by setting the slider 15, the transverse push rod 16, the arc-shaped inclined groove 17, the rotating ring 18, the external gear ring 19, the driving rack 20, and the vertical block 21, the driving force of the electric push rod 22 can be converted into the synchronous deflection movement of multiple groups of assembly rods 3, so as to achieve the purpose of adjusting the blowing directions of multiple groups of fans 10, making the fans 10 installed at appropriate positions away from the smoke detector, and the directions should be towards the smoke detector, so that the fans 10 can blow away the surrounding smoke or fumes, reducing the direct impact on the smoke detector.

[0052] As Figure 6 and Figure 7 As shown in the figure, the rotating ring 18 is limit-rotatably installed in the upper housing 4. There are 4-8 groups of arc-shaped inclined grooves 17 arranged in a circular array on the rotating ring 18. The transverse push rod 16 is inserted into the arc-shaped inclined groove 17. The upper end face of the rotating ring 18 is fixedly connected with an external gear ring 19, and the external gear ring 19 is meshed and connected with the driving rack 20. The driving rack 20 is limit-slidably installed in the upper housing 4. The vertical block 21 is fixedly connected to the back of the driving rack 20. The piston rod of the electric push rod 22 extends outwards and is fixedly connected to the vertical block 21.

[0053] Specifically, when false alarm adjustment is required, the main controller controls the electric push rod 22 to be turned on. The piston rod of the electric push rod 22 retracts inwards and pulls the vertical block 21. The vertical block 21 pushes the driving rack 20, causing it to drive the external gear ring 19 to rotate counterclockwise. The external gear ring 19 acts on the rotating ring 18, and the arc-shaped inclined groove 17 on the rotating ring 18 acts on the transverse push rod 16, so that the transverse push rod 16 drives the radial push bar 14 to be pulled outwards. The radial push bar 14 acts on the longitudinal push column 13 and the slider 15 at the same time. The longitudinal push column 13 acts on the inclined groove 12, causing the shutter 11 to move upwards away from the fan 10 under force, avoiding the fan 10 from being blocked; while the slider 15 acts on the assembly rod 3, causing the assembly rod 3 to deflect counterclockwise upwards with the hinge seat 2 as the rotation point, so that the fan 10 is just in a position adapted to the smoke inlet hole 8.

[0054] As Figure 3 , Figure 8 , Figure 9 and Figure 10As shown in the figure, the second driving device includes a central shaft 26, a cylindrical cam 27, a cylindrical pin 28, a longitudinal movement bar 29, a nut plate 30 and a vertical screw rod 31. The vertical screw rod 31 is driven by a micro motor and is rotationally installed in the lower housing 7 with limited movement. The nut plate 30 is internally provided with an internal thread hole for accommodating the vertical screw rod 31. Both the longitudinal movement bar 29 and the nut plate 30 are installed in the lower housing 7 with limited sliding movement.

[0055] Furthermore, through the design of the central shaft 26, the cylindrical cam 27, the cylindrical pin 28, the longitudinal movement bar 29, the nut plate 30 and the vertical screw rod 31, the driving force of the micro motor can be converted into the synchronous rotational movement of multiple movable baffles 25, so as to achieve the purpose of changing the size of the bending angle formed between the movable baffle 25 and the fixed baffle 23, which can reduce the amount of smoke directly entering the smoke detector, thereby increasing the difficulty of false alarms.

[0056] As Figure 9 and Figure 10 shown in the figure, one end of the longitudinal movement bar 29 is fixedly connected to the nut plate 30, and the other end of the longitudinal movement bar 29 is fixedly connected to the cylindrical pin 28. The cylindrical pin 28 is clamped in the curve groove of the cylindrical cam 27. The cylindrical cam 27 is rotationally installed in the lower housing 7 with limited movement and is fixedly connected to the central shaft 26. The central shaft 26 is movably inserted into the fixed baffle 23, and the movable end of the movable baffle 25 is fixedly sleeved on the central shaft 26.

[0057] Specifically, when adjusting for false alarms, the main controller will also control the micro motor to rotate. The vertical screw rod 31 rotates counterclockwise. Under the action of the screw engagement of the internal and external threads, the nut plate 30 drives the longitudinal movement bar 29 to move downward. The cylindrical pin 28 on the longitudinal movement bar 29 acts on the curve groove of the cylindrical cam 27, causing it to drive the central shaft 26 to deflect counterclockwise. At this time, the angle between the movable baffle 25 and the adjacent fixed baffle 23 becomes smaller, and the amount of flue gas entering also becomes smaller.

[0058] When the present invention is in use: During normal operation, the flue gas sequentially passes through the smoke inlet hole 8, the protective filter screen 9, and the labyrinth channel assembly, and finally enters the detection hole for detection by the detection assembly. When false alarm adjustment is required, on the one hand, the sensitivity of the smoke detector itself is adjusted to try to reduce false alarms. On the other hand, the main controller controls the electric push rod 22 to be turned on. The piston rod of the electric push rod 22 retracts inward and pulls the vertical block 21. The vertical block 21 pushes the driving rack 20, causing it to drive the external gear ring 19 to rotate counterclockwise. The external gear ring 19 acts on the rotating ring 18, and the arc-shaped inclined groove 17 on the rotating ring 18 acts on the transverse push rod 16, causing the transverse push rod 16 to drive the radial push bar 14 to be pulled outwards. The radial push bar 14 acts on the longitudinal push post 13 and the slider 15 at the same time. The longitudinal push post 13 acts on the inclined groove 12, causing the shutter 11 to move upwards under force and move away from the fan 10 to avoid the fan 10 from blocking. The slider 15 acts on the assembly rod 3, causing the assembly rod 3 to rotate counterclockwise upwards with the hinge seat 2 as the rotation point, so that the fan 10 is just in a position adapted to the smoke inlet hole 8. The fan 10 can blow away the surrounding smoke or flue gas, and can reduce the direct influence on the smoke detector from the outside;

[0059] During this process, the main controller will also control the micro motor to rotate, causing the vertical screw rod 31 to rotate counterclockwise. Under the screwing action of the internal and external threads, the nut plate 30 drives the longitudinal moving strip 29 to move downwards. The cylindrical pin 28 on the longitudinal moving strip 29 acts on the curve groove of the cylindrical cam 27, causing it to drive the central shaft 26 to deflect counterclockwise. At this time, the angle between the movable baffle 25 and the adjacent fixed baffle 23 becomes smaller, and the amount of flue gas entering also becomes smaller, reducing the number of smokes directly entering the smoke detector from the inside and further increasing the difficulty of false alarms.

[0060] A false alarm adjustment system for a smoke detector used in fire protection, including a main control module for the overall control and parameter adjustment of the smoke detector, including the adjustment of sensitivity, the setting of alarm thresholds, and the control of other modules; a battery for outputting a stable power supply; a power management module for managing and protecting the battery, and at the same time providing a stable power output for the control circuit, monitoring and adjusting the parameters of voltage and current; a smoke detector module for monitoring the smoke concentration in the air, and including a sensor, a control circuit, and an alarm; a data processing module for collecting, processing, and analyzing the false alarm data of the smoke detector module, real-time monitoring of the smoke concentration and environmental conditions, and controlling and adjusting the mechanical auxiliary module and the self-adjustment module; a self-adjustment module for adjusting the sensitivity of the sensor itself; a mechanical auxiliary adjustment module for adjusting environmental factors; a buzzer for prompting or alarming; an LED indicator for displaying the change in smoke concentration; wherein, the power management module is respectively connected to the main control module and the battery.

[0061] By setting up the mechanical assistance module and the self - adjustment module to work together, the system realizes more flexible and accurate adjustment of the smoke detector sensitivity, thereby reducing the false alarm risk and improving the performance of the fire monitoring system.

[0062] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire smoke detector, comprising, from top to bottom, a mounting base (1), an upper housing (4), a circuit board (5), an inner housing (6) and a lower housing (7), characterized in that: A plurality of sets of hinged seats (2) are fixedly arranged on the periphery of the mounting base (1), each set of hinged seats (2) is provided with a set of assembly rods (3), a slot is provided inside the lower end of each set of assembly rods (3), a blowing assembly is provided inside the slot, and the plurality of sets of assembly rods (3) are driven by a first driving device and synchronously perform an upward and downward deflection movement to adjust the blowing direction of the blowing assembly; smoke inlet holes (8) are evenly distributed on the side wall of the lower half of the lower shell (7), a protective filter screen (9) for enclosing the smoke inlet holes (8) is provided in the inner cavity of the lower shell (7), and the inner ring of the protective filter screen (9) is provided with A labyrinth channel assembly, the labyrinth channel assembly comprises a plurality of groups of fixed baffles (23) distributed in a circular array, the lower ends of the plurality of groups of fixed baffles (23) are fixedly arranged on the inner bottom wall of the lower shell (7), the upper ends of the plurality of groups of fixed baffles (23) are in contact with the lower end surface of the inner shell (6), and each group of fixed baffles (23) is provided with an auxiliary baffle (24) and a movable baffle (25) at one end away from the protective filter (9), and the plurality of groups of movable baffles (25) are driven by a second driving device and synchronously perform 0-90° forward and reverse rotational motion to achieve the effect of increasing or decreasing the amount of smoke entering the smoke detector.

2. A fire smoke detector according to claim 1, characterized in that: The plurality of groups of fixed baffles (23) are distributed in a circular array, and a guide bar is protrudingly provided at one end of each group of fixed baffles (23) close to the protective filter screen (9), a first bend is formed between the guide bar and the fixed baffle (23), a second bend is provided in the middle of each group of fixed baffles (23), and an auxiliary baffle (24) is fixedly connected to a side wall of the fixed baffle (23), and a third bend is formed between the auxiliary baffle (24) and the fixed baffle (23).

3. A fire smoke detector according to claim 1, characterized in that: The mounting base (1) is connected to the upper shell (4) via a detachable component, the upper shell (4) is connected to the lower shell (7) via a snap-on component, a circuit board (5) is fixedly arranged inside the upper shell (4), a detection component is protrudingly arranged in the middle of the lower end surface of the circuit board (5), the inner shell (6) is snap-connected in the inner cavity of the lower shell (7), a detection hole is opened inside the inner shell (6) and communicates with the lower shell (7), and the detection component extends into the detection hole.

4. A fire smoke detector according to claim 1, characterized in that: The blowing assembly comprises a fan (10), the fan (10) being controlled to rotate by a controller, the surface of the assembly rod (3) being in contact with a shielding plate (11) for blocking the fan (10), the shielding plate (11) being slidably mounted on the outer wall of the upper shell (4), an inclined groove (12) being formed at the upper end of the shielding plate (11), a longitudinal push column (13) being inserted into the inclined groove (12), and the longitudinal push column (13) being connected to a first driving device.

5. A fire smoke detector according to claim 4, characterized in that: The first driving device comprises a slider (15), a transverse push rod (16), an arc-shaped inclined groove (17), a rotating ring (18), an outer gear ring (19), an active rack (20), a vertical block (21) and an electric push rod (22); one end of the slider (15) is limitedly slidably mounted on the assembly rod (3); the other end of the slider (15) is rotatably connected to the radial push strip (14); the longitudinal push column (13) is fixedly arranged on the outer wall of the radial push strip (14); one end of the radial push strip (14) away from the longitudinal push column (13) extends into the upper shell (4) and is fixedly connected to the transverse push rod (16).

6. A fire smoke detector according to claim 5, characterized in that: The rotating ring (18) is mounted in the upper housing (4) for limited rotation. The rotating ring (18) is provided with 4 to 8 groups of arc-shaped inclined grooves (17) distributed in a ring array. The transverse push rod (16) is inserted into the arc-shaped inclined grooves (17). The upper end surface of the rotating ring (18) is fixedly connected to an outer gear ring (19), and the outer gear ring (19) is meshedly connected to an active rack (20).

7. A fire smoke detector according to claim 5, characterized in that: The active rack (20) is limitedly slidably mounted in the upper housing (4), the vertical block (21) is fixedly connected to the back of the active rack (20), and the piston rod of the electric push rod (22) extends outward and is fixedly connected to the vertical block (21).

8. The fire smoke detector according to claim 1, characterized in that: The second driving device comprises a central shaft (26), a cylindrical cam (27), a cylindrical pin (28), a longitudinal shift bar (29), a nut plate (30) and a vertical screw rod (31); the vertical screw rod (31) is driven by a micro motor and is mounted in a limited rotational manner in the lower housing (7); an internal screw hole for accommodating the vertical screw rod (31) is provided in the nut plate (30); and the longitudinal shift bar (29) and the nut plate (30) are both mounted in a limited sliding manner in the lower housing (7).

9. A fire smoke detector according to claim 8, characterized in that: One end of the longitudinal shift bar (29) is fixedly connected to the nut plate (30), and the other end of the longitudinal shift bar (29) is fixedly connected to the cylindrical pin (28). The cylindrical pin (28) is clamped in the curved groove of the cylindrical cam (27). The cylindrical cam (27) is limitedly rotatably mounted in the lower housing (7) and fixedly connected to the central shaft (26). The central shaft (26) is movably plugged into the fixed baffle (23), and the movable end of the movable baffle (25) is fixedly sleeved on the central shaft (26).

10. A false alarm adjustment system for a fire smoke detector according to any one of claims 1 to 9, characterized in that: It includes a main control module, which is used for overall control and parameter adjustment of the smoke detector of the control module, including sensitivity adjustment, alarm threshold setting and control of other modules; Batteries, used to output stable power; The power management module is used to manage and protect the battery, provide stable power output for the control circuit, and monitor and adjust the voltage and current parameters; A smoke sensor module, which is used to monitor the smoke concentration in the air and includes a sensor, a control circuit and an alarm; The data processing module is used to collect, process and analyze the false alarm data of the smoke sensor module, monitor the smoke concentration and environmental conditions in real time, and control and adjust the mechanical auxiliary module and the self-regulating module; Self-adjusting module, used to adjust the sensitivity of the sensor itself; Mechanical auxiliary adjustment module, a device for adjusting environmental factors; Buzzer, reminder or alarm; LED indicator light to show changes in smoke concentration; Wherein, the power management module is connected to the main control module and the battery respectively.

Images