Intelligent fire-fighting smoke exhaust device with self-cleaning function

Abstract

The utility model discloses an intelligent fire-fighting smoke exhaust device with a self-cleaning function, relates to the technical field of fire-fighting equipment, aims to solve the technical problem that the current intelligent fire-fighting smoke exhaust device is poor in self-cleaning effect, and comprises a smoke exhaust fan main body. Through the arrangement of the first L-shaped semicircular plate, the second L-shaped semicircular plate, the driving structure, the back-blowing air pipe, the back-blowing fan and the like, when a fire disaster occurs and the smoke exhaust fan body exhausts smoke indoors, the smoke enters from the exposed half of the lower part of the circular filter screen plate and then is exhausted outdoors, and the smoke exhaust effect is good. In the process, the driving structure drives the circular filter screen plate to rotate, meanwhile, the reverse blowing fan is controlled to work, the reverse blowing fan conveys outdoor air to the reverse blowing air pipe, then the reverse blowing air pipe conducts reverse blowing on the part, passing through the position between the first L-shaped semicircular plate and the second L-shaped semicircular plate, of the circular filter screen plate, and cleaning of the circular filter screen plate is achieved.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and more specifically, to a smart fire smoke exhaust device with self-cleaning function. Background Technology

[0002] Intelligent fire-fighting smoke extraction systems are an important component of modern building fire protection systems. They typically consist of smoke extraction fans equipped with smoke detectors and filters for filtering smoke particles. In the event of a fire, the smoke extraction fans can promptly expel smoke, creating favorable conditions for personnel evacuation and fire rescue, while the filters can effectively filter dust, particulate matter, and other contaminants from the smoke, reducing secondary pollution to the environment and equipment.

[0003] In existing intelligent fire smoke extraction devices, particulate matter gradually accumulates on the filter screen during use, leading to filter clogging and affecting smoke extraction. To solve this problem, the device is usually equipped with a self-cleaning structure, which is typically a cleaning brush structure that can automatically move back and forth, or a back-blowing airflow to clean the filter screen. The cleaning brush structure has disadvantages such as incomplete cleaning, easy wear of the brush strips, and high maintenance costs. Back-blowing airflow cleaning requires the device to stop smoke extraction and back-blowing the filter screen, which is not conducive to smoke extraction and cannot continuously achieve back-blowing airflow cleaning of the filter screen, thus failing to ensure the ventilation of the filter screen at all times, which is not conducive to smoke extraction filtration. In view of this, we propose an intelligent fire smoke extraction device with a self-cleaning function. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a smart fire smoke exhaust device with self-cleaning function to solve the technical problem of poor self-cleaning effect of current smart fire smoke exhaust devices.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a smart fire smoke exhaust device with self-cleaning function, including a smoke exhaust fan body, a circular filter plate rotatably arranged inside the rear side of the smoke exhaust fan body, a first L-shaped semicircular plate arranged on one side of the circular filter plate inside the smoke exhaust fan body, a smoke detector arranged on the side of the first L-shaped semicircular plate facing away from the circular filter plate, a second L-shaped semicircular plate arranged on the other side of the circular filter plate inside the smoke exhaust fan body, the first L-shaped semicircular plate and the second L-shaped semicircular plate are arranged symmetrically, a driving structure is arranged at the center of the side of the second L-shaped semicircular plate facing away from the circular filter plate, a number of sets of back-blowing air pipes are equidistantly arranged on the side of the second L-shaped semicircular plate facing the circular filter plate, and a mounting cavity is arranged at the top of the smoke exhaust fan body, and a back-blowing air blower is arranged inside the mounting cavity;

[0006] The inner wall of the back-blowing duct is provided with several sets of spiral guide vanes arranged at equal intervals along the circumference, and the air outlet of the back-blowing duct adopts a gradually narrowing and widening design.

[0007] Preferably, the interior of the semicircular part of the second L-shaped semicircular plate is hollow, the back-blowing air pipe is connected to the inner cavity of the semicircular part of the second L-shaped semicircular plate, the output end of the back-blowing air blower is connected to the inner cavity of the semicircular part of the second L-shaped semicircular plate through a conduit, the input end of the back-blowing air blower is connected to an air intake pipe, and the air intake pipe extends to the outside of the exhaust fan body.

[0008] Preferably, the circular filter screen includes a cross frame, a fan-shaped screen, and an outer ring. The cross frame is arranged inside the outer ring, the fan-shaped screen is arranged in the separation area between the cross frame and the outer ring, and the outer ring is rotatably arranged inside the exhaust fan body.

[0009] Preferably, the top of the horizontal part of the first L-shaped semicircular plate is a triangular face, and the exhaust fan body has a discharge port at the position corresponding to both ends of the horizontal part of the triangular face.

[0010] Preferably, the drive structure includes a bracket, a motor, and a rotating shaft. The bracket is arranged on the second L-shaped semicircular plate, the motor is arranged inside the bracket, and the rotating shaft is rotatably arranged on the second L-shaped semicircular plate. The rotating shaft is coaxial with the second L-shaped semicircular plate, and one end of the rotating shaft is connected to the center of the cross frame.

[0011] Preferably, the rotating shaft at the output end of the motor is provided with pulleys at the end of the shaft facing away from the second L-shaped semicircular plate, and a transmission belt is arranged between the two sets of pulleys.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through the arrangement of a first L-shaped semicircular plate, a second L-shaped semicircular plate, a drive structure, a back-blowing duct, and a back-blowing fan, etc., has the first and second L-shaped semicircular plates located at the top rear side inside the main body of the smoke exhaust fan. The first and second L-shaped semicircular plates are respectively located on both sides of a circular filter plate, with half of the circular filter plate positioned between the first and second L-shaped semicircular plates. The circular filter plate is rotatably arranged inside the main body of the smoke exhaust fan. Therefore, when a fire occurs and the main body of the smoke exhaust fan vents smoke from the room, the smoke enters through the exposed half of the lower part of the circular filter plate and is then discharged outdoors. During this process, the smoke is controlled by the drive structure. The moving structure drives the circular filter plate to rotate and simultaneously controls the back-blowing fan to operate. The back-blowing fan delivers outdoor air to the back-blowing duct, and then the back-blowing duct back-blown air onto the portion of the circular filter plate between the first and second L-shaped semicircular plates, thus cleaning the circular filter plate. This process can be carried out simultaneously with smoke exhaust, thereby ensuring the cleanliness of the circular filter plate at all times, thus guaranteeing both the filtration and ventilation effects of the circular filter plate. It achieves a better self-cleaning effect on the circular filter plate without affecting smoke exhaust, solving the technical problem of poor self-cleaning effect in current intelligent fire smoke exhaust devices. Therefore, this utility model has a better self-cleaning advantage.

[0014] 2. The inner wall of the reverse-blowing duct of this utility model has several sets of spiral guide vanes evenly distributed along the circumference, and the air outlet of the reverse-blowing duct adopts a gradually narrowing and widening design. The high-pressure airflow moves in a spiral motion along the inner wall of the reverse-blowing duct with the help of the spiral guide vanes, forming a vortex flow similar to a "tornado". This rotating airflow can generate lateral shear force on the particles on the circular filter screen. Compared with the traditional straight airflow, it is easier to peel off stubborn particles adhering to the pores or folds of the circular filter screen. The gradually narrowing and widening air outlet of the reverse-blowing duct (Venturi principle) can enhance kinetic energy and expand the reverse-blowing range. With the combination of the two, the spiral airflow is accelerated after passing through the gradually narrowing and widening air outlet, and the rotation speed and impact kinetic energy are further improved, forming a dual cleaning force of "spiral cutting + high-pressure impact", which is especially suitable for high-viscosity particles (such as molten polymer particles in fire smoke), thereby improving the reverse-blowing cleaning effect on the circular filter screen and further improving the self-cleaning effect of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 4This is a schematic diagram of the first structure of the second L-shaped semicircular plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the second structure of the second L-shaped semicircular plate of this utility model;

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the backflush duct of this utility model;

[0021] Figure 7 This is a schematic diagram of the first L-shaped semicircular plate structure of this utility model;

[0022] Figure 8 This is a schematic diagram of the circular filter screen structure of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Main body of exhaust fan; 101. Mounting cavity; 102. Suction pipe; 103. Discharge port; 2. Smoke detector; 3. Circular filter plate; 301. Cross frame; 302. Fan-shaped mesh plate; 303. Outer ring; 4. First L-shaped semicircular plate; 401. Triangular face; 5. Second L-shaped semicircular plate; 6. Drive structure; 601. Bracket; 602. Motor; 603. Rotating shaft; 604. Pulley; 605. Transmission belt; 7. Back-blowing duct; 701. Spiral guide vane; 8. Back-blowing fan. Detailed Implementation

[0025] like Figures 1 to 8As shown, this utility model relates to a smart fire smoke exhaust device with self-cleaning function, including a smoke exhaust fan body 1. A circular filter plate 3 is rotatably arranged on the rear side inside the smoke exhaust fan body 1. A first L-shaped semicircular plate 4 is arranged on one side of the circular filter plate 3 inside the smoke exhaust fan body 1. A smoke detector 2 is arranged on the side of the first L-shaped semicircular plate 4 facing away from the circular filter plate 3. A second L-shaped semicircular plate 5 is arranged on the other side of the circular filter plate 3 inside the smoke exhaust fan body 1. The first L-shaped semicircular plate 4 and the second L-shaped semicircular plate 5 are arranged symmetrically. A driving structure 6 is arranged at the center of the side of the second L-shaped semicircular plate 5 facing away from the circular filter plate 3. Several sets of back-blowing pipes 7 are equidistantly arranged on one side of the circular filter plate 3. The top of the exhaust fan body 1 is provided with a mounting cavity 101, and a back-blowing blower 8 is arranged inside the mounting cavity 101. The semicircular part of the second L-shaped semicircular plate 5 is hollow. The back-blowing pipe 7 is connected to the inner cavity of the semicircular part of the second L-shaped semicircular plate 5. The output end of the back-blowing blower 8 is connected to the inner cavity of the semicircular part of the second L-shaped semicircular plate 5 through a conduit. The input end of the back-blowing blower 8 is connected to a suction pipe 102, which extends to the outside of the exhaust fan body 1. The top of the horizontal part of the first L-shaped semicircular plate 4 is a triangular face 401. A discharge port 103 is opened on the exhaust fan body 1 at the corresponding positions of the two ends of the horizontal part of the triangular face 401.

[0026] When smoke detector 2 detects smoke, it sends a signal to the external controller, which then automatically controls the equipment to operate. At this time, the exhaust fan 1 exhausts smoke from the room. The smoke enters through the exposed half of the lower part of the circular filter plate 3 and is then discharged outdoors. During this process, the drive structure 6 drives the circular filter plate 3 to rotate, and simultaneously controls the back-blowing fan 8 to operate. The back-blowing fan 8 draws in outdoor air through the suction pipe 102, then delivers it to the inner cavity of the semicircular part of the second L-shaped semicircular plate 5, and discharges it through the back-blowing pipe 7. The airflow discharged from the back-blowing pipe 7 then passes through the first L-shaped semicircular plate 5 and the circular filter plate 3. Back-blowing is applied to the area between the circular plate 4 and the second L-shaped semicircular plate 5 to clean the circular filter screen 3. The cleaned particles fall onto the horizontal part of the first L-shaped semicircular plate 4 and slide down the triangular surface 401 of the horizontal part of the first L-shaped semicircular plate 4, and then are discharged from the discharge port 103 on the exhaust fan body 1, thus completing the self-cleaning of the circular filter screen 3. This process can be carried out simultaneously with the exhaust, thereby ensuring the cleanliness of the circular filter screen 3 at all times, which in turn ensures the filtration and ventilation effects of the circular filter screen 3. It achieves a better self-cleaning effect on the circular filter screen 3 without affecting the exhaust.

[0027] Specifically, the circular filter plate 3 includes a cross frame 301, a fan-shaped mesh plate 302, and an outer ring 303. The cross frame 301 is arranged inside the outer ring 303, and the fan-shaped mesh plate 302 is arranged in the separation area between the cross frame 301 and the outer ring 303. The outer ring 303 is rotatably arranged inside the exhaust fan body 1. The cross frame 301 and the outer ring 303 cooperate, and the fan-shaped mesh plate 302 is arranged in the separation area between them, which can make the circular filter plate 3 have better strength and less prone to deformation and damage.

[0028] Furthermore, the drive structure 6 includes a bracket 601, a motor 602, and a rotating shaft 603. The bracket 601 is arranged on the second L-shaped semicircular plate 5, the motor 602 is arranged inside the bracket 601, and the rotating shaft 603 is rotatably arranged on the second L-shaped semicircular plate 5. The rotating shaft 603 is coaxial with the second L-shaped semicircular plate 5, and one end of the rotating shaft 603 is connected to the center of the cross frame 301. The rotating shaft at the output end of the motor 602 is provided with pulleys 604 at the end of the rotating shaft 603 facing away from the second L-shaped semicircular plate 5, and a transmission belt 605 is arranged between the two sets of pulleys 604. The motor 602 drives the pulleys 604 on it to rotate, and then the two sets of pulleys 604 can drive the rotating shaft 603 to rotate under the transmission belt 605. Then the rotating shaft 603 can drive the cross frame 301 to rotate, that is, drive the circular filter screen plate 3 to rotate.

[0029] In the embodiments of this utility model, a number of sets of spiral guide vanes 701 are arranged equidistantly along the circumference on the inner wall of the back-blowing duct 7, and the air outlet of the back-blowing duct 7 adopts a gradually narrowing and expanding design.

[0030] Under the cooperation of the spiral guide vane 701, the high-pressure airflow moves in a spiral motion along the inner wall of the back-blowing duct 7, forming a vortex flow similar to a "tornado". This rotating airflow can generate lateral shear force on the particles on the circular filter screen 3. Compared with the traditional straight airflow, it is easier to peel off stubborn particles that adhere to the pores or folds of the circular filter screen 3. The gradually narrowing and widening air outlet of the back-blowing duct 7 (Venturi principle) can enhance the kinetic energy and expand the back-blowing range. With the combination of the two, the spiral airflow is accelerated after passing through the gradually narrowing and widening air outlet, and the rotation speed and impact kinetic energy are further improved, forming a dual cleaning force of "spiral cutting + high-pressure impact", which is especially suitable for high-viscosity particles (such as molten polymer particles in fire smoke), thereby improving the back-blowing cleaning effect on the circular filter screen 3 and further improving the self-cleaning effect of the equipment.

[0031] Working Principle: This embodiment provides a smart fire smoke extraction device with self-cleaning function. First, when the smoke detector 2 senses smoke, it transmits a signal to the external controller. Then, the external controller automatically controls the device to work. At this time, the smoke extraction fan body 1 exhausts smoke from the room. The smoke enters through the exposed half of the lower part of the circular filter plate 3 and is then discharged outdoors. During this process, the drive structure 6 drives the circular filter plate 3 to rotate and simultaneously controls the back-blowing fan 8 to work. The back-blowing fan 8 draws in outdoor air through the suction pipe 102, then delivers it to the inner cavity of the semicircular part of the second L-shaped semicircular plate 5, and discharges it through the back-blowing pipe 7. The air discharged through the back-blowing pipe 7... The airflow back-blowing between the first L-shaped semicircular plate 4 and the second L-shaped semicircular plate 5 cleans the circular filter screen 3. The cleaned particles fall onto the horizontal part of the first L-shaped semicircular plate 4 and slide down the triangular surface 401 of the horizontal part of the first L-shaped semicircular plate 4, and then are discharged from the discharge port 103 on the exhaust fan body 1, thus completing the self-cleaning of the circular filter screen 3. This process can be carried out at the same time as the exhaust, so as to always keep the circular filter screen 3 clean, that is, to ensure the filtration effect and ventilation effect of the circular filter screen 3, and achieve a better self-cleaning effect of the circular filter screen 3 without affecting the exhaust.

[0032] Secondly, the high-pressure airflow, in conjunction with the spiral guide vane 701, moves in a spiral motion along the inner wall of the back-blowing duct 7, forming a vortex flow similar to a "tornado". This rotating airflow can generate lateral shear force on the particles on the circular filter screen 3. Compared with the traditional straight airflow, it is easier to peel off stubborn particles adhering to the pores or folds of the circular filter screen 3. The gradually narrowing and widening air outlet of the back-blowing duct 7 (Venturi principle) can enhance kinetic energy and expand the back-blowing range. With the combination of the two, the spiral airflow is accelerated after passing through the gradually narrowing and widening air outlet, and the rotation speed and impact kinetic energy are further improved, forming a dual cleaning force of "spiral cutting + high-pressure impact", which is especially suitable for high-viscosity particles (such as molten polymer particles in fire smoke), thereby improving the back-blowing cleaning effect on the circular filter screen 3 and further improving the self-cleaning effect of the equipment.

[0033] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A smart fire-fighting smoke extraction device with self-cleaning function, characterized in that, The system includes a smoke exhaust fan body (1), a circular filter plate (3) is rotatably arranged on the rear side inside the smoke exhaust fan body (1), a first L-shaped semicircular plate (4) is arranged on one side of the circular filter plate (3) inside the smoke exhaust fan body (1), a smoke detector (2) is arranged on the side of the first L-shaped semicircular plate (4) facing away from the circular filter plate (3), a second L-shaped semicircular plate (5) is arranged on the other side of the circular filter plate (3) inside the smoke exhaust fan body (1), the first L-shaped semicircular plate (4) and the second L-shaped semicircular plate (5) are arranged symmetrically, a drive structure (6) is arranged at the center of the side of the second L-shaped semicircular plate (5) facing away from the circular filter plate (3), and several sets of back-blowing air pipes (7) are arranged equidistantly on the side of the second L-shaped semicircular plate (5) facing the circular filter plate (3). A mounting cavity (101) is arranged on the top of the smoke exhaust fan body (1), and a back-blowing air blower (8) is arranged inside the mounting cavity (101). The inner wall of the back-blowing duct (7) is provided with several sets of spiral guide vanes (701) arranged at equal intervals along the circumference, and the air outlet of the back-blowing duct (7) adopts a gradually narrowing and widening design.

2. The intelligent fire-fighting smoke exhaust device with self-cleaning function according to claim 1, characterized in that, The interior of the semicircular part of the second L-shaped semicircular plate (5) is hollow. The back-blowing pipe (7) is connected to the inner cavity of the semicircular part of the second L-shaped semicircular plate (5). The output end of the back-blowing blower (8) is connected to the inner cavity of the semicircular part of the second L-shaped semicircular plate (5) through a conduit. The input end of the back-blowing blower (8) is connected to a suction pipe (102). The suction pipe (102) extends through to the outside of the exhaust fan body (1).

3. The intelligent fire-fighting smoke exhaust device with self-cleaning function according to claim 1, characterized in that, The circular filter plate (3) includes a cross frame (301), a fan-shaped mesh plate (302) and an outer ring (303). The cross frame (301) is arranged inside the outer ring (303), and the fan-shaped mesh plate (302) is arranged in the separation area between the cross frame (301) and the outer ring (303). The outer ring (303) is rotatably arranged inside the exhaust fan body (1).

4. The intelligent fire-fighting smoke exhaust device with self-cleaning function according to claim 1, characterized in that, The top of the horizontal part of the first L-shaped semicircular plate (4) is a triangular face (401), and the exhaust fan body (1) is provided with a discharge port (103) at the corresponding positions of the two ends of the horizontal part of the triangular face (401).

5. A smart fire-fighting smoke extraction device with self-cleaning function according to claim 3, characterized in that, The drive structure (6) includes a bracket (601), a motor (602) and a rotating shaft (603). The bracket (601) is arranged on the second L-shaped semicircular plate (5), the motor (602) is arranged inside the bracket (601), and the rotating shaft (603) is rotatably arranged on the second L-shaped semicircular plate (5). The rotating shaft (603) is coaxial with the second L-shaped semicircular plate (5), and one end of the rotating shaft (603) is connected to the center of the cross frame (301).

6. A smart fire-fighting smoke extraction device with self-cleaning function according to claim 5, characterized in that, The output shaft of the motor (602) is provided with pulleys (604) at the end of the shaft (603) facing away from the second L-shaped semicircular plate (5), and a transmission belt (605) is arranged between the two sets of pulleys (604).

Images