Fire-fighting audible and visual alarm

Abstract

The invention relates to the technical field of fire alarm, in particular to a fire-fighting audible and visual alarm. Comprising an outer shell, an indicating lamp is fixedly connected to the top of the outer shell, a buzzer is fixedly connected to the interior of the outer shell, an inner shell is fixedly connected to the interior of the outer shell, an infrared lamp is fixedly connected to the interior of the outer shell, a protective shell is fixedly connected to the interior of the outer shell, and a photoelectric sensor is fixedly connected to the interior of the outer shell. The top of the shell is fixedly connected with a micro servo motor, the shell is provided with a smoke inlet hole and a sound outlet hole, an output shaft of the micro servo motor is fixedly connected with a plugging frame through a connecting piece, and the top of the shell is fixedly connected with a temperature sensor. When a fire does not occur, the smoke inlet hole and the sound outlet hole are blocked by using the blocking frame, so that external insects are prevented from entering the device to nest and breed, secretions of the insects can block the photoelectric sensor in the device, and the sound-light alarm device cannot send an alarm signal to the outside in time.

Description

Technical Field

[0001] The present invention relates to the technical field of fire alarm, in particular to a fire alarm with sound and light. Background Art

[0002] In recent years, due to the increasing losses caused by fire, in order to protect people's life and property safety, fire alarm systems are widely used in various places such as residences, commercial buildings, factories, schools, etc. The sound and light alarm device is a device used to quickly attract people's attention in various emergency situations. The sound and light alarm device can send both sound and light alarm signals to people at the same time. Therefore, it plays an important role in the fire alarm system. When there is no fire in the existing sound and light alarm device, its smoke detection port and the sound outlet of the buzzer are both in the open state, which can easily cause insects to enter the interior of the sound and light alarm device to nest and reproduce. The secretions of the insects will block the internal photoelectric sensor, causing the sound and light alarm device to be unable to send an alarm signal to the outside world in time when a fire occurs, resulting in the fire being unable to be extinguished in time, causing great harm to people's life and property safety. Summary of the invention

[0003] In order to overcome the disadvantage that insects enter the interior of the sound and light alarm device to build nests and reproduce, resulting in secretions blocking the photoelectric sensor, the present invention provides a fire sound and light alarm.

[0004] The technical solution of the present invention is: a fire sound and light alarm, comprising a shell, an information module is fixedly connected to the bottom of the shell, an indicator light electrically connected to the information module is fixedly connected to the top of the shell, a buzzer electrically connected to the information module is fixedly connected to the inside of the shell, an inner shell is fixedly connected to the inside of the shell, the inner shell and the shell cooperate to form a smoke storage cavity, an infrared lamp electrically connected to the information module is fixedly connected to the inside of the shell, the infrared lamp is located in the smoke storage cavity, a protective shell located in the smoke storage cavity is fixedly connected to the inside of the shell, and a photoelectric sensor electrically connected to the information module is fixedly connected to the inside of the shell. The photoelectric sensor is located in the protective shell, a micro servo motor electrically connected to the information module is fixedly connected to the top of the shell, the shell is provided with a circular array of smoke inlet holes and a circular array of sound outlet holes, the smoke inlet holes of the circular array are all connected to the inner shell, the output shaft of the micro servo motor is fixedly connected to a blocking frame rotatably connected to the shell through a connecting piece, the smoke inlet holes of the circular array and the sound outlet holes of the circular array are both blocked with the blocking frame, a temperature sensor electrically connected to the information module is fixedly connected to the top of the shell, and a sealing component for increasing its own sealing strength is provided on the blocking frame.

[0005] Furthermore, the sealing assembly includes a fixed cylinder in an annular array, the fixed cylinders in the annular array are all fixedly connected to the outside of the sealing frame, a flexible pad in an annular array is provided on the side of the sealing frame close to the outer shell, the flexible pads in the annular array are cooperated with the sealing frame to form a closed cavity, the fixed cylinders in the annular array are respectively connected with adjacent closed cavities, the fixed cylinders in the annular array are all sealed and slidably connected with a first piston shaft, a first elastic element is provided between the fixed cylinder and the adjacent first piston shaft, a fixing ring is fixedly connected to the outside of the outer shell through a connecting piece, the fixing ring is fixedly connected with a first extrusion block in an annular array, and the first extrusion blocks in the annular array are respectively extruded and cooperated with the adjacent first piston shafts.

[0006] Furthermore, the first extrusion block has an inclined surface, and the inclined surface of the first extrusion block is in contact with the adjacent first piston shaft.

[0007] Furthermore, it also includes a current limiting component for preventing rapid diffusion of gas, the current limiting component is arranged on the inner shell, the current limiting component includes an electromagnet electrically connected to the information module, the electromagnet is fixed to the bottom of the inner shell, the inner shell is slidably connected to a limiting cylinder, a second elastic element is arranged between the electromagnet and the limiting cylinder, the electromagnet is adsorbed and cooperated with the limiting cylinder, and a sealing component for sealing itself is arranged on the top of the protective shell.

[0008] Furthermore, the blocking assembly includes a blocking plate in an annular array, and the blocking plates in the annular array are all in contact and cooperate with the limiting cylinder. The outside of the protective shell is fixedly connected with a fixed axis of the annular array. The blocking plates in the annular array are slidably connected to the fixed axis of the annular array of the protective shell through connecting pieces. A third elastic element is arranged between the connecting pieces on the blocking plates in the annular array and the fixed axis of the annular array on the protective shell. The blocking plates in the annular array are jointly sealed and cooperated with the protective shell, and a trigger assembly for pushing the blocking is arranged on the outside of the limiting cylinder.

[0009] Furthermore, the trigger assembly includes a first extrusion plate in an annular array, the first extrusion plates in the annular array are all fixedly connected to the outside of the limiting cylinder, the blocking plates in the annular array are all fixedly connected to the second extrusion plates, and the first extrusion plates in the annular array are respectively extruded and matched with adjacent second extrusion plates.

[0010] Furthermore, the first extruded plate and the second extruded plate are both right-angled triangular plates, the hypotenuse of the first extruded plate faces the side away from the protective shell, and the hypotenuse of the second extruded plate faces the opposite direction to the adjacent first extruded plate.

[0011] Furthermore, it also includes a cleaning component for cleaning the photoelectric sensor, the cleaning component is arranged inside the protective shell, the cleaning component includes a rotating ring, the rotating ring is sealingly rotatably connected to the bottom of the shell, the rotating ring is fixed with a ring-shaped array of flexible scrapers, the flexible scrapers of the ring-shaped array are all located inside the protective shell, the flexible scrapers of the ring-shaped array are in contact with the photoelectric sensor, and the flexible scrapers of the ring-shaped array are jointly provided with a dust blowing component for blowing dust off the photoelectric sensor.

[0012] Furthermore, the sootblowing assembly includes an air outlet shell, the air outlet shell is fixedly connected to the flexible scraper of the annular array, the air outlet shell is fixedly connected and connected to a push cylinder, the push cylinder is internally sealed and slidably connected with a second piston shaft, a fourth elastic element is arranged between the second piston shaft and the push cylinder, the air outlet shell is provided with air holes in an annular array, the inner wall of the protective shell is fixedly connected to the second extrusion blocks of the annular array, and the second extrusion blocks of the annular array are all extrusion-matched with the second piston shaft.

[0013] Furthermore, the air holes of the annular array are arranged obliquely from the inside to the outside of the air outlet shell, and the oblique direction is toward the photoelectric sensor.

[0014] The beneficial effects are: 1. The present invention uses a blocking frame to block the smoke inlet and sound outlet when no fire occurs, thereby preventing external insects from entering the device to build nests and reproduce. The secretions of the insects will block the internal photoelectric sensors, making it impossible for the sound and light alarm device to send alarm signals to the outside world in time.

[0015] 2. The gas drives the flexible pad to expand, further strengthening the sealing strength of the sealing frame to the smoke inlet and sound outlet, preventing water vapor in the outside air from entering the device and causing corrosion of the electronic components in the device.

[0016] 3. By gathering the smoke above the photoelectric sensor, the smoke is prevented from slowly entering the smoke storage cavity and diffusing, resulting in low smoke concentration and inability to directly activate the photoelectric sensor, thereby extending the alarm activation time.

[0017] 4. The protective shell is sealed with three sealing plates to prevent smoke from accumulating in the limit cylinder and adhering to the photoelectric sensor in the protective shell, causing the photoelectric sensor to be unable to receive light source stimulation and unable to turn on.

[0018] 5. Use a flexible scraper to scrape off the smoke and dust, and use gas to impact the smoke and dust attached to the photoelectric sensor to separate it from the photoelectric sensor, so as to prevent the smoke and dust from blocking the photoelectric sensor from receiving light, causing the photoelectric sensor to be unable to turn on. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the parts inside the housing of the present invention; Figure 3 A schematic cross-sectional view of the three-dimensional structure of the outer shell, inner shell and protective shell; Figure 4 It is a schematic diagram of the three-dimensional structure of the blocking frame and the fixing tube of the present invention; Figure 5 It is a cross-sectional schematic diagram of the three-dimensional structure of the fixed tube and the flexible pad of the present invention; Figure 6 It is a schematic cross-sectional view of the three-dimensional structure of the limiting cylinder of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the first extruded plate and the second extruded plate of the present invention; Figure 8 It is a schematic cross-sectional view of the three-dimensional structure of the protective shell of the present invention; Fig. 9 It is a schematic cross-sectional view of the three-dimensional structure of the gas outlet housing and the push cylinder of the present invention.

[0020] The names of the numbers in the figure are: 1-shell, 2-information module, 3-indicator light, 4-buzzer, 5-inner shell, 6-infrared lamp, 7-protective shell, 8-photoelectric sensor, 9-micro servo motor, 10-smoke inlet, 11-sound outlet, 12-blocking frame, 13-temperature sensor, 201-fixed cylinder, 202-flexible pad, 203-first piston shaft, 204-first elastic element, 205-fixed ring, 206-first extrusion block, 301-electromagnet, 302-limiting cylinder, 303-second elastic element, 401-blocking plate, 402-third elastic element, 403-first extrusion plate, 404-second extrusion plate, 501-rotating ring, 502-flexible scraper, 503-gas outlet shell, 504-push cylinder, 505-second piston shaft, 506-fourth elastic element, 507-air hole, 508-second extrusion block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] When there is no fire, the smoke detection port and the buzzer sound outlet of the existing sound and light alarm device are both open, which can easily lead to insects entering the sound and light alarm device to build nests and reproduce, and then block the internal photoelectric sensor, causing the sound and light alarm device to be unable to send an alarm signal to the outside world in time when a fire occurs, resulting in the fire being unable to be extinguished in time, causing great harm to people's lives and property safety.

[0023] Embodiment 1: A fire alarm, such as Figure 1-Figure 5 As shown, it includes a shell 1, an information module 2 is fixedly connected to the bottom of the shell 1, and the information module 2 is electrically connected to the main control room. An indicator light 3 electrically connected to the information module 2 is fixedly connected to the top of the shell 1, and the indicator light 3 is used to send a visual signal to the outside world. A buzzer 4 electrically connected to the information module 2 is fixedly connected to the inside of the shell 1, and the buzzer 4 is used to send a sound signal to the outside world. An inner shell 5 is fixedly connected to the inside of the shell 1, and the inner shell 5 cooperates with the shell 1 to form a smoke storage cavity, and the smoke storage cavity is used to store thick smoke generated by a fire. An infrared lamp 6 electrically connected to the information module 2 is fixedly connected to the inside of the shell 1, and the infrared lamp 6 is located in the smoke storage cavity. The infrared lamp 6 releases light. When the smoke in the smoke storage cavity reaches the alarm concentration, the light released by the infrared lamp 6 will be refracted. A protective shell 7 located in the smoke storage cavity is fixedly connected to the inside of the shell 1. A photoelectric sensor 8 electrically connected to the information module 2 is fixedly connected to the inside of the shell 1. The photoelectric sensor 8 is turned on after receiving the light of the infrared lamp 6 refracted by the smoke. The photoelectric sensor 8 is located in the protective shell 7. The photoelectric sensor 8 is partially shielded by the protective shell 7 to prevent the infrared lamp 6 from directly triggering the photoelectric sensor 8 to turn on. A micro servo motor 9 electrically connected to the information module 2 is fixedly connected to the top of the shell 1. The shell 1 is provided with There are four smoke inlet holes 10 in a circular array and four sound outlet holes 11 in a circular array. The sound outlet holes 11 are used to transmit the sound of the buzzer 4 outward. The four smoke inlet holes 10 in the circular array are all connected to the inner shell 5, so that the smoke generated by the fire enters the smoke storage cavity formed by the inner shell 5 and the outer shell 1 through the four smoke inlet holes 10 in the circular array. The output shaft of the micro servo motor 9 is fixedly connected to a blocking frame 12 rotatably connected to the outer shell 1 through a connecting piece. The four smoke inlet holes 10 in the circular array and the four sound outlet holes 11 in the circular array are all blocked with the blocking frame 12. The output shaft of the micro servo motor 9 drives the blocking frame through the connecting piece 12 opens or releases the blocking of the sound outlet 11 and the smoke inlet 10. When no fire occurs, the blocking frame 12 blocks the smoke inlet 10 and the sound outlet 11 to prevent external insects from entering the device to build nests and reproduce. The secretions of insects will block the internal photoelectric sensors, causing the sound and light alarm device to be unable to send an alarm signal to the outside world in time. A temperature sensor 13 electrically connected to the information module 2 is fixedly connected to the top of the shell 1. The temperature sensor 13 is used to detect the temperature of the detection area of ​​the device. The blocking frame 12 is provided with a sealing component for increasing the sealing strength of the smoke inlet 10 and the sound outlet 11.

[0024] like Figure 1-Figure 5As shown, the sealing assembly includes four fixed cylinders 201 in an annular array, the four fixed cylinders 201 in the annular array are all fixedly connected to the outside of the blocking frame 12, four flexible pads 202 in an annular array are arranged on the inner side of the blocking frame 12, the four flexible pads 202 in the annular array cooperate with the blocking frame 12 to form a closed cavity, the four fixed cylinders 201 in the annular array are respectively connected to adjacent closed cavities, the four fixed cylinders 201 in the annular array are all sealed and slidably connected with a first piston shaft 203, a first elastic element 204 is arranged between the fixed cylinder 201 and the adjacent first piston shaft 203, the first elastic element 204 is a tension spring, and the first elastic element 204 is used to drive the adjacent first piston shaft 2 03 reset, the outside of the shell 1 is fixedly connected with a fixing ring 205 through a connecting piece, and the inside of the fixing ring 205 is fixedly connected with a first extrusion block 206 of an annular array, and the first extrusion block 206 has an inclined surface, and the inclined surface of the first extrusion block 206 is fitted with the adjacent first piston shaft 203. The four first extrusion blocks 206 of the annular array are respectively extruded and matched with the adjacent first piston shaft 203. The first extrusion block 206 squeezes the adjacent first piston shaft 203 to make it slide along the adjacent fixed cylinder 201 and push the internal gas thereof, so as to expand the flexible pad 202 and further seal the smoke inlet 10 and the sound outlet 11, so as to prevent external water vapor from entering the device and corroding the internal electronic components.

[0025] When the device is in use, it is installed in the required detection area. The staff turns on the micro servo motor 9 through the information module 2, so that the output shaft of the micro servo motor 9 drives the blocking frame 12 to rotate counterclockwise, so that the blocking frame 12 blocks the four smoke inlet holes 10 of the circular array and the four sound outlet holes 11 of the circular array, and then turns off the micro servo motor 9 to prevent external insects from entering the device to build nests and reproduce when no fire occurs. The secretions of the insects will block the internal photoelectric sensor, causing the sound and light alarm device to be unable to send an alarm signal to the outside world in time.

[0026] When the output shaft of the micro servo motor 9 drives the blocking frame 12 to block the smoke inlet 10 and the sound outlet 11 through the connecting piece, the blocking frame 12 drives the four fixed cylinders 201 in the circular array thereon to rotate synchronously. The rotation of the fixed cylinder 201 drives the first piston shaft 203 inside it to rotate. The first extrusion block 206 squeezes the adjacent first piston shaft 203, so that the first piston shaft 203 slides along the adjacent fixed cylinder 201. At the same time, the first elastic element 204 is stretched. At this time, the first piston shaft 203 pushes the gas in the fixed cylinder 201 into the closed cavity formed by the adjacent flexible pad 202 and the blocking frame 12. The gas pressure in the closed cavity increases, and the gas drives the flexible pad 202 to expand, further increasing the blocking of the smoke inlet 10 and the sound outlet 11 by the blocking frame 12, thereby preventing water vapor in the outside air from entering the device, causing corrosion of the electronic components in the device, and this continues until the blocking frame 12 stops rotating.

[0027] When a fire occurs, after the temperature sensor 13 detects that the temperature of the detected area rises to the ignition temperature, the temperature sensor 13 is turned on to send a signal to the information module 2. After receiving the signal, the information module 2 turns on the micro servo motor 9. The output shaft of the micro servo motor 9 drives the blocking frame 12 to rotate clockwise. The blocking frame 12 rotates clockwise to release the blocking of the four smoke inlet holes 10 of the annular array and the four sound outlet holes 11 of the annular array. At this time, the external thick smoke enters the inner shell 5 through the four smoke inlet holes 10 of the annular array, flows downward along the inner shell 5, and finally enters the smoke storage formed by the inner shell 5 and the outer shell 1. In the cavity, the smoke gradually diffuses in the smoke storage cavity, and the infrared lamp 6 is turned on. When the concentration of the smoke in the smoke storage cavity is sufficient to refract the optical fiber of the infrared lamp 6 to the photoelectric sensor 8 (here is a simple working principle of the photoelectric smoke alarm, and the specific principle will not be described in detail), the photoelectric sensor 8 sends a signal to the information module 2, and judges whether a fire occurs through the dual judgment of temperature and smoke, thereby improving the accuracy of fire detection. When the information module 2 receives the signal, the indicator light 3 and the buzzer 4 are turned on to sound an alarm. At the same time, the information module 2 sends a fire signal to the main control room to call for rescue.

[0028] When the fire is extinguished, the temperature of the area detected by the temperature sensor 13 decreases, and the micro servo motor 9 is turned on to drive the blocking frame 12 to block the smoke inlet 10 and the sound outlet 11 again, waiting for the next fire to occur, and repeating the above steps.

[0029] Existing photoelectric smoke alarms require smoke to reach a certain concentration before they can refract the infrared light and turn on the photoelectric sensor. However, it takes a certain amount of time for smoke to reach the required concentration in the smoke storage cavity, so the photoelectric sensor cannot be turned on in time, shortening the fire rescue time and causing the fire to be unable to be extinguished in time.

[0030] Embodiment 2: Based on embodiment 1, Figure 3 and Figure 6 As shown, it also includes a current limiting component for preventing rapid diffusion of gas. The current limiting component is arranged on the inner shell 5. The current limiting component includes an electromagnet 301 electrically connected to the information module 2. The initial state of the electromagnet 301 is an open state. The electromagnet 301 is fixed to the bottom of the inner side of the inner shell 5. The inner shell 5 is internally slidably connected with a limiting cylinder 302. The top of the limiting cylinder 302 is made of metal material. A second elastic element 303 is arranged between the electromagnet 301 and the limiting cylinder 302. The second elastic element 303 is a spring, and the initial state is a compressed state, which is used to drive the limiting cylinder 302 to separate from the protective shell 7. The electromagnet 301 and the limiting cylinder 302 are adsorbed and matched. The electromagnet 301 adsorbs the top of the limiting cylinder 302, so that the limiting cylinder 302 slides downward along the inner shell 5, and the top of the protective shell 7 is provided with a blocking component for sealing itself.

[0031] like Figure 6 and Figure 7 As shown, the blocking assembly includes three blocking plates 401 in an annular array, and the blocking plates 401 are fan-shaped plates. The upper planes of the three blocking plates 401 in the annular array are all in contact with the bottom of the limiting cylinder 302. The outside of the protective shell 7 is fixedly connected with three fixed shafts of the annular array. The limiting cylinder 302 slides downward along the inner shell 5 and contacts the upper planes of the three blocking plates 401 in the annular array. At this time, the smoke entering the smoke storage cavity formed by the inner shell 5 and the outer shell 1 is gathered above the photoelectric sensor 8. The three blocking plates 401 in the annular array are respectively slidably connected to the three fixed shafts of the annular array outside the protective shell 7 through connecting pieces. A third elastic element 402 is arranged between the connecting parts on the three sealing plates 401 of the annular array and the three fixed axes of the annular array outside the protective shell 7 respectively. The third elastic element 402 is a spring. The third elastic element 402 is used to drive the adjacent sealing plates 401 to reset. The three sealing plates 401 of the annular array cooperate with the protective shell 7 to form a circular plate to seal the top of the protective shell 7 to prevent smoke from gathering inside the limiting cylinder 302, entering the protective shell 7, and adhering to the photoelectric sensor 8. A trigger component for promoting the blockage is arranged on the outside of the limiting cylinder 302.

[0032] like Figure 7 As shown, the trigger assembly includes three first extrusion plates 403 in an annular array, the first extrusion plates 403 are right-angled triangular plates, the hypotenuse of the first extrusion plates 403 faces upward and the outside of the limiting cylinder 302, the first extrusion plates 403 in the annular array are all fixedly connected to the outside of the limiting cylinder 302, the three blocking plates 401 in the annular array are all fixedly connected to the second extrusion plates 404, the second extrusion plates 404 are right-angled triangular plates, the hypotenuse of the second extrusion plates 404 faces downward and the inside of the limiting cylinder 302, the three first extrusion plates 403 in the annular array are respectively extruded and matched with the adjacent second extrusion plates 404, the limiting cylinder 302 drives the first extrusion plate 403 to squeeze the adjacent second extrusion plate 404, so that the second extrusion plate 404 drives the adjacent blocking plate 401 to release the blocking of the protective shell 7.

[0033] When the temperature sensor 13 senses the high temperature phenomenon, the sealing frame 12 releases the sealing of the smoke inlet 10 and the sound outlet 11, and delays the closing of the electromagnet 301, so that the external smoke enters the inner shell 5 along the four smoke inlet holes 10 of the annular array and continues to flow downward. At this time, the limiting cylinder 302 contacts the three sealing plates 401 of the annular array below, and the smoke cannot enter the smoke storage cavity formed by the inner shell 5 and the outer shell 1, that is, the smoke gathers above the photoelectric sensor 8, avoiding the smoke from directly entering the smoke storage cavity and diffusing, resulting in the smoke concentration being unable to directly turn on the photoelectric sensor 8. When the smoke accumulates in the limiting cylinder 302, the electromagnet 301 is closed. At this time, the electromagnet 301 no longer applies an adsorption force to the limiting cylinder 302, and the second elastic element 303 is reset. The reset of the second elastic element 303 drives the limiting cylinder 302 to slide upward along the inner shell 5 and separate from the protective shell 7. At this time, the smoke gathers above the photoelectric sensor 8.

[0034] When the limiting cylinder 302 slides along the inner shell 5, the limiting cylinder 302 drives the three first extrusion plates 403 of the annular array to move upward synchronously, and the first extrusion plate 403 squeezes the adjacent second extrusion plate 404. The second extrusion plate 404 drives the adjacent blocking plate 401 to slide outward along the protective shell 7 under the extrusion force, and at the same time the third elastic element 402 is compressed. When the limiting cylinder 302 slides to the top, the three blocking plates 401 of the annular array release the blockage of the protective shell 7. The protective shell 7 is blocked by the three blocking plates 401 to prevent the smoke from adhering to the photoelectric sensor 8 in the protective shell 7 when the smoke accumulates in the limiting cylinder 302, causing the photoelectric sensor 8 to be unable to receive the stimulation of the light source, resulting in the photoelectric sensor 8 being unable to be turned on.

[0035] When the three sealing plates 401 of the annular array release the seal on the protective shell 7, the light source released by the infrared lamp 6 passes through the smoke and is refracted to the photoelectric sensor 8, turning on the photoelectric sensor 8 and starting the alarm. By converging the smoke to the top of the photoelectric sensor 8, the smoke is prevented from slowly entering the smoke storage cavity and diffusing. The concentration cannot directly turn on the photoelectric sensor 8, thereby extending the alarm activation time.

[0036] When the fire is extinguished, the electromagnet 301 is turned on again, and the electromagnet 301 absorbs the limiting cylinder 302 and slides downward to contact the protective shell 7. At the same time, the second elastic element 303 is compressed, and the three third elastic elements 402 of the annular array are reset to drive the three blocking plates 401 of the annular array to block the protective shell 7 again.

[0037] After the fire is extinguished, some smoke will remain inside the alarm and adhere to the surface of the photoelectric sensor 8. When a fire occurs again, the smoke will block the light released by the infrared lamp 6, causing the photoelectric sensor 8 to be unable to receive light, making the device unable to alarm.

[0038] Embodiment 3: Based on embodiment 2, Figure 8 and Fig. 9 As shown, it also includes a cleaning component for cleaning the photoelectric sensor 8, which is arranged inside the protective shell 7. The cleaning component includes a rotating ring 501, which is sealed and rotatably connected to the bottom of the outer shell 1. The rotating ring 501 is fixedly connected to four flexible scrapers 502 in an annular array, and the four flexible scrapers 502 in the annular array are all located inside the protective shell 7. The flexible scrapers 502 are used to flexibly scrape off the smoke and dust attached to the photoelectric sensor 8 while avoiding scratching the photoelectric sensor 8. The four flexible scrapers 502 in the annular array are in contact with the photoelectric sensor 8, and the four flexible scrapers 502 in the annular array are jointly provided with a soot blowing component for blowing away the dust on the photoelectric sensor 8.

[0039] like Figure 8 and Fig. 9 As shown, the sootblowing assembly includes an air outlet shell 503, the air outlet shell 503 is fixedly connected to four flexible scrapers 502 in an annular array, the outer side of the air outlet shell 503 is fixedly connected and communicated with a push cylinder 504, the push cylinder 504 is sealed and slidably connected with a second piston shaft 505, a fourth elastic element 506 is arranged between the second piston shaft 505 and the push cylinder 504, the fourth elastic element 506 is a tension spring, and is used to drive the second piston shaft 505 to reset, the air outlet shell 503 is provided with four air holes 507 in an annular array, the four air holes 507 in the annular array are alternately distributed with the flexible scrapers 502 in the annular array, the four air holes 507 in the annular array are tilted downward from the inside to the outside of the air outlet shell 503 toward the photoelectric sensor 8, and the inner wall of the protective shell 7 is fixedly connected with an annular array The second extrusion block 508 of the row is a right-angled triangle plate. The hypotenuse of the second extrusion block 508 is in contact with the inner wall of the protective shell 7. The second extrusion blocks 508 of the annular array are all extruded and matched with the second piston shaft 505. When the second piston shaft 505 slides along the short right-angled side of the second extrusion block 508, the second piston shaft 505 slides inward along the push cylinder 504 and pushes out the gas in the gas outlet shell 503. When the second piston shaft 505 slides along the long right-angled side of the second extrusion block 508, the second piston shaft 505 slides outward along the push cylinder 504 and allows external gas to enter the gas outlet shell 503, so that the speed at which the second piston shaft 505 pushes out the gas along the push cylinder 504 is greater than the speed at which the gas is extracted, thereby preventing external dust from entering the gas outlet shell 503 due to the extraction force.

[0040] After the fire is extinguished, the staff rotates the rotating ring 501 clockwise, and the rotating ring 501 drives the four flexible scrapers 502 of the annular array to scrape off the smoke and dust attached to the photoelectric sensor 8. At the same time, the four flexible scrapers 502 of the annular array drive the gas outlet shell 503 to rotate, and the gas outlet shell 503 drives the push cylinder 504 on it to rotate synchronously. The rotation of the push cylinder 504 drives the second piston shaft 505 inside to rotate synchronously. At this time, the second extrusion block 508 squeezes the second piston shaft 505, and the second piston shaft 505 slides along the push cylinder 504 under the extrusion force, and pushes the gas in the push cylinder 504 into the gas outlet shell 503. At the same time, the fourth elastic element 506 is stretched, and the gas enters the gas outlet shell 503 and moves along the air holes of the annular array. 507 is discharged, and the gas impacts the smoke attached to the photoelectric sensor 8, causing it to move around the photoelectric sensor 8, and this continues until the second piston shaft 505 moves to the top of the adjacent second extrusion block 508, and the fourth elastic element 506 is reset to drive the second piston shaft 505 to reset and extract external gas until the second piston shaft 505 is separated from the second extrusion block 508. When the second piston shaft 505 contacts the second extrusion block 508 again, the above steps are repeated, and the smoke is scraped off by the flexible scraper 502. At the same time, the smoke attached to the photoelectric sensor 8 is impacted by the gas to separate it from the photoelectric sensor 8, so as to prevent the smoke from blocking the photoelectric sensor 8 from receiving light, causing the photoelectric sensor 8 to be unable to be turned on.

[0041] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A fire sound and light alarm, comprising a shell (1), an information module (2) being fixedly connected to the bottom of the shell (1), an indicator light (3) being fixedly connected to the information module (2) being fixedly connected to the top of the shell (1), a buzzer (4) being fixedly connected to the information module (2) being fixedly connected to the inside of the shell (1), an inner shell (5) being fixedly connected to the inside of the shell (1), the inner shell (5) and the shell (1) forming a smoke storage cavity, an infrared lamp (6) being fixedly connected to the inside of the shell (1), the infrared lamp (6) being located in the smoke storage cavity, a protective shell (7) being fixedly connected to the inside of the shell (1) and being located in the smoke storage cavity, a photoelectric sensor (8) being fixedly connected to the inside of the shell (1), the photoelectric sensor (8) being located in the protective shell (7), and characterized in that: The invention also comprises a micro servo motor (9) electrically connected to the information module (2), the micro servo motor (9) being fixedly connected to the top of the outer shell (1), the outer shell (1) being provided with an annular array of smoke inlet holes (10) and an annular array of sound outlet holes (11), the annular array of smoke inlet holes (10) being connected to the inner shell (5), the output shaft of the micro servo motor (9) being fixedly connected to a blocking frame (12) rotatably connected to the outer shell (1) via a connecting piece, the annular array of smoke inlet holes (10) and the annular array of sound outlet holes (11) being blocked and cooperated with the blocking frame (12), the top of the outer shell (1) being fixedly connected to a temperature sensor (13) electrically connected to the information module (2), the blocking frame (12) being provided with a sealing component for increasing its own sealing strength.

2. A fire sound and light alarm according to claim 1, characterized in that: The sealing assembly comprises a ring-shaped array of fixed cylinders (201), the fixed cylinders (201) of the ring-shaped array are all fixedly connected to the outside of the blocking frame (12), a ring-shaped array of flexible pads (202) is arranged on the side of the blocking frame (12) close to the shell (1), the flexible pads (202) of the ring-shaped array are all matched with the blocking frame (12) to form a closed cavity, the fixed cylinders (201) of the ring-shaped array are respectively connected to adjacent closed cavities, the fixed cylinders (201) of the ring-shaped array are all sealed and slidably connected with a first piston shaft (203), a first elastic element (204) is arranged between the fixed cylinder (201) and the adjacent first piston shaft (203), the outside of the shell (1) is fixedly connected with a fixed ring (205) through a connecting piece, the fixed ring (205) is fixedly connected with a first extrusion block (206) of the ring-shaped array, and the first extrusion blocks (206) of the ring-shaped array are respectively extruded and matched with the adjacent first piston shafts (203).

3. A fire sound and light alarm according to claim 2, characterized in that: The first extrusion block (206) has an inclined surface, and the inclined surface of the first extrusion block (206) is in contact with the adjacent first piston shaft (203).

4. A fire sound and light alarm according to claim 1, characterized in that: The invention also comprises a flow-limiting component for preventing rapid diffusion of gas, the flow-limiting component being arranged on the inner shell (5), the flow-limiting component comprising an electromagnet (301) electrically connected to the information module (2), the electromagnet (301) being fixed to the bottom of the inner shell (5), the inner shell (5) being slidably connected to a limiting cylinder (302), a second elastic element (303) being arranged between the electromagnet (301) and the limiting cylinder (302), the electromagnet (301) and the limiting cylinder (302) being adsorbed and matched, and a blocking component for blocking itself is arranged at the top of the protective shell (7).

5. A fire sound and light alarm according to claim 4, characterized in that: The blocking component comprises a ring-shaped array of blocking plates (401), the ring-shaped array of blocking plates (401) are all in contact with the limiting cylinder (302), the outside of the protective shell (7) is fixedly connected to the fixing shaft of the ring-shaped array, the ring-shaped array of blocking plates (401) are respectively slidably connected to the fixing shaft of the ring-shaped array of the protective shell (7) through connecting pieces, and third elastic elements (402) are respectively arranged between the connecting pieces on the ring-shaped array of blocking plates (401) and the fixing shaft of the ring-shaped array on the protective shell (7), the ring-shaped array of blocking plates (401) are jointly blocked with the protective shell (7), and the outside of the limiting cylinder (302) is provided with a trigger component for promoting blocking.

6. A fire sound and light alarm according to claim 5, characterized in that: The trigger assembly comprises a first extrusion plate (403) in an annular array, the first extrusion plates (403) in the annular array are all fixedly connected to the outside of the limiting cylinder (302), the blocking plates (401) in the annular array are all fixedly connected to second extrusion plates (404), and the first extrusion plates (403) in the annular array are respectively extruded and matched with adjacent second extrusion plates (404).

7. A fire sound and light alarm according to claim 6, characterized in that: The first extruded plate (403) and the second extruded plate (404) are both right-angled triangular plates; the hypotenuse of the first extruded plate (403) faces towards a side away from the protective shell (7); and the hypotenuse of the second extruded plate (404) faces in a direction opposite to that of the adjacent first extruded plate (403).

8. The fire sound and light alarm according to claim 1, characterized in that: The invention also comprises a cleaning component for cleaning the photoelectric sensor (8), the cleaning component being arranged inside the protective shell (7), the cleaning component comprising a rotating ring (501), the rotating ring (501) being sealingly rotatably connected to the bottom of the outer shell (1), the rotating ring (501) being fixedly connected to a ring-shaped array of flexible scrapers (502), the flexible scrapers (502) in the ring-shaped array being all located inside the protective shell (7), the flexible scrapers (502) in the ring-shaped array being in contact with the photoelectric sensor (8), and the flexible scrapers (502) in the ring-shaped array being jointly provided with a dust blowing component for blowing away dust on the photoelectric sensor (8).

9. A fire sound and light alarm according to claim 8, characterized in that: The sootblowing assembly includes an air outlet shell (503), the air outlet shell (503) is fixedly connected to the flexible scraper (502) of the annular array, the air outlet shell (503) is fixedly connected to and communicated with a push cylinder (504), the push cylinder (504) is internally sealed and slidably connected with a second piston shaft (505), a fourth elastic element (506) is arranged between the second piston shaft (505) and the push cylinder (504), the air outlet shell (503) is provided with air holes (507) of an annular array, the inner wall of the protective shell (7) is fixedly connected with the second extrusion blocks (508) of the annular array, and the second extrusion blocks (508) of the annular array are all extruded and matched with the second piston shaft (505).

10. A fire sound and light alarm according to claim 9, characterized in that: The air holes (507) of the annular array are arranged obliquely from the inside to the outside of the air outlet shell (503), and the oblique direction is toward the photoelectric sensor (8).

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