An easy-to-clean smoke exhaust valve

Abstract

This utility model discloses an easy-to-clean smoke exhaust valve, relating to the field of smoke exhaust valve technology. The utility model includes an U-shaped cleaning frame, inside which a valve body is fixedly installed. A movable filter assembly and a flushing and cleaning assembly are disposed between the U-shaped cleaning frame and the valve body. A collection assembly is provided on one side of the filter end of the movable filter assembly. This utility model drives the filter end via a drive end, allowing the filter end inside the valve body to continuously move into the U-shaped cleaning frame, while the filter end inside the U-shaped cleaning frame continuously moves into the valve body. During this process, the flushing and cleaning assembly washes and cleans the dust accumulated on the filter end. This arrangement ensures that the airflow rate of the valve body is not affected by dust and impurities accumulated on the filter end, and that only the drive end needs to be activated to clean the accumulated dust and impurities on the filter end.

Description

Technical Field

[0001] This utility model belongs to the technical field of smoke exhaust valves, and specifically relates to a smoke exhaust valve that is easy to clean. Background Technology

[0002] Smoke exhaust dampers are the core control components of building smoke control systems. They typically consist of a fire damper body, an electric actuator, and a linkage control module. Their function is to quickly open or close specific air ducts in the event of a fire, guiding high-temperature smoke to a preset smoke exhaust path.

[0003] High-temperature flue gas typically carries a significant amount of dust and impurities. To prevent these dust and impurities from being discharged from the exhaust valve, some exhaust valves are equipped with internal filters. When the flue gas is discharged from the exhaust valve, the filter screen on the filter screen filters out the dust and impurities. However, the filtered dust and impurities tend to accumulate on the filter screen. With prolonged operation of the exhaust valve, the accumulated dust and impurities can clog the filter screen, thereby reducing airflow to the exhaust valve. Utility Model Content

[0004] To address the problem that dust and impurities accumulated on filter screens are not easily cleaned in a timely manner, this utility model proposes an easy-to-clean smoke exhaust valve to overcome the aforementioned technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is an easy-to-clean smoke exhaust valve, including an incline cleaning frame, in which a valve body is fixedly installed, a movable filter assembly and a flushing and cleaning assembly are arranged between the incline cleaning frame and the valve body, a collection assembly is arranged on one side of the filter end of the movable filter assembly, and a sealing assembly is arranged inside the valve body.

[0007] The movable filter assembly is used to filter dust and impurities in the flue gas. At the same time, the movable filter assembly can move between the U-shaped cleaning frame and the main body of the air valve so that the flushing and cleaning assembly can clean the dust and impurities accumulated on the filter end.

[0008] Furthermore, the movable filter assembly includes a take-up roller, which is provided at both the top and bottom of the air valve body. The take-up roller is rotatably connected to the C-shaped cleaning frame. Movable grooves are provided at both the top and bottom of the air valve body. A movable filter screen is movably connected inside the movable groove. The two ends of the movable filter screen are respectively fixedly connected to two take-up rollers. A guide roller is rotatably connected inside the C-shaped cleaning frame. The movable filter screen is located outside the guide roller.

[0009] Furthermore, the shaft ends of the two take-up rollers pass through the C-shaped cleaning frame and are fixedly connected to a connecting sprocket. A connecting chain meshes with the outer surface of the connecting sprocket. A storage box is fixedly connected to the outer side of the C-shaped cleaning frame corresponding to the connecting sprocket and the connecting chain. A drive motor is fixedly connected to the outer surface of the storage box. The output end of the drive motor is fixedly connected to the shaft end of one of the take-up rollers.

[0010] Furthermore, the flushing and cleaning assembly includes flushing pipes, multiple of which are arranged inside the U-shaped cleaning frame. A flushing plate is fixedly installed on the inner wall of the U-shaped cleaning frame. Several nozzles are arranged on the outer surfaces of the flushing pipes and the flushing plate. A diversion pipe is arranged on the outer side of the U-shaped cleaning frame. The diversion pipe is fixedly connected to the flushing pipes and the flushing plate. Cleaning brushes are fixedly connected to the top of the inner wall of the U-shaped cleaning frame and the top of the air valve body. The top and bottom of the air valve body are arranged in the same way.

[0011] Furthermore, a support frame is fixedly connected to the bottom of the C-shaped cleaning frame, and a through groove is opened at the top of the support frame. The through groove extends into the interior of the C-shaped cleaning frame, and a sewage collection box is movably connected inside the through groove. A baffle is fixedly connected to the top of the air valve body.

[0012] Furthermore, the collection component includes an inclined scraper, which is fixedly connected to the bottom of the inner wall of the air valve body. A collection groove is provided on one side of the inclined scraper. A storage frame is fixedly connected to the bottom of the air valve body corresponding to the collection groove. An impurity collection box is movably connected inside the storage frame. A pressure relief groove is provided on one side of the storage frame. A pressure relief filter is fixedly connected to the outside of the impurity collection box corresponding to the pressure relief groove.

[0013] Furthermore, the sealing assembly includes a rotating shaft, multiple rotating shafts are rotatably connected inside the air valve body, a sealing plate is fixedly connected to the outside of the rotating shaft, the top ends of several rotating shafts penetrate the air valve body and are fixedly connected to a switch sprocket, a switch chain is meshed on the outer surface of the switch sprocket, an installation box is fixedly installed on the top of the air valve body corresponding to the switch sprocket and the switch chain, a switch motor is fixedly installed on the top of the installation box, and the output end of the switch motor is fixedly connected to one of the rotating shafts.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model filters dust and impurities in flue gas through a filter end set on a movable filter assembly. When a large amount of dust and impurities accumulate on the filter end, the filter end is driven by the drive end, so that the filter end inside the air valve body can continuously move into the U-shaped cleaning frame, and the filter end inside the U-shaped cleaning frame continuously moves into the air valve body. During this process, the flushing and cleaning assembly can flush and clean the dust accumulated on the filter end. The above settings ensure that the airflow rate of the air valve body is not affected by the dust and impurities accumulated on the filter end. At the same time, only the drive end needs to be driven to clean the dust and impurities accumulated on the filter end, and the whole operation process is relatively convenient.

[0016] 2. This utility model uses nozzles on the rinsing pipe to directly spray cleaning agent onto the moving filter screen. As the moving filter screen moves continuously, the cleaning brush can scrub the moistened screen, removing accumulated dust and impurities. Simultaneously, the cleaning agent sprayed from the nozzles on the rinsing plate can laterally rinse the cleaning brush and the moving filter screen. This allows dust and impurities adhering to the cleaning brush and those removed from the screen to move directly to one side of the U-shaped cleaning frame and fall into the wastewater collection box through the channel. The above-mentioned design, through the synergistic effect of spraying, brushing, and lateral rinsing, efficiently removes dust and impurities from the surface of the moving filter screen. This integrated design ensures the continuity and thoroughness of the cleaning process, significantly improving filter screen cleaning efficiency.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the external outline structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 Rear view structural diagram;

[0021] Figure 3 This is a schematic diagram of the internal structure of the C-shaped cleaning device of this utility model;

[0022] Figure 4This is a schematic diagram of the movable filter structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the external structure of the main body of the air valve of this utility model;

[0024] Figure 6 This is a schematic diagram of the flushing and cleaning assembly of this utility model;

[0025] Figure 7 This is a schematic diagram of the sealing component structure of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. C-shaped cleaning frame; 2. Air valve body; 3. Movable filter assembly; 301. Rewind roller; 302. Movable trough; 303. Movable filter screen; 304. Guide roller; 305. Connecting sprocket; 306. Connecting chain; 307. Storage box; 308. Drive motor; 4. Washing and sweeping assembly; 401. Washing pipe; 402. Washing plate; 403. Nozzle; 404. Diverter pipe; 405. Cleaning brush; 406. 407. Support frame; 408. Through groove; 409. Sewage collection box; 4000. Baffle; 5. Collection assembly; 501. Inclined scraper; 502. Collection trough; 503. Storage frame; 504. Impurity collection box; 505. Pressure relief trough; 506. Pressure relief filter; 6. Sealing assembly; 601. Rotating shaft; 602. Sealing plate; 603. Switch sprocket; 604. Switch chain; 605. Mounting box; 606. Switch motor. Detailed Implementation

[0028] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0029] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0030] Please see Figures 1-7As shown, this utility model is an easy-to-clean smoke exhaust valve, including a C-shaped cleaning frame 1, a valve body 2 fixedly installed inside the C-shaped cleaning frame 1, a movable filter assembly 3 and a flushing and cleaning assembly 4 arranged between the C-shaped cleaning frame 1 and the valve body 2, a collection assembly 5 arranged on one side of the filter end of the movable filter assembly 3, and a sealing assembly 6 arranged inside the valve body 2;

[0031] The movable filter assembly 3 is used to filter dust and impurities in the flue gas. At the same time, the movable filter assembly 3 can move between the U-shaped cleaning frame 1 and the air valve body 2 so that the flushing and cleaning assembly 4 can clean the dust and impurities accumulated on the filter end.

[0032] By installing the damper body 2 at the port of the exhaust duct, the sealing component 6 is opened when the flue gas is discharged, allowing the flue gas inside the exhaust duct to be discharged through the damper body 2. During this process, the filter end of the movable filter component 3 can filter out dust and impurities in the flue gas, and some of the filtered impurities can fall directly into the collection component 5. When there is a lot of dust and impurities accumulated on the filter end, the drive end of the movable filter component 3 can drive the filter end inside the damper body 2 to move continuously into the U-shaped cleaning frame 1, while the flushing and cleaning component 4 can flush and clean the dust and impurities on the filter end.

[0033] The filter end on the movable filter assembly 3 filters dust and impurities in the flue gas. When a lot of dust and impurities accumulate on the filter end, the drive end drives the filter end, so that the filter end inside the damper body 2 can move continuously into the U-shaped cleaning frame 1. The filter end inside the U-shaped cleaning frame 1 moves continuously into the damper body 2. During this process, the flushing and cleaning assembly 4 can flush and clean the dust accumulated on the filter end. The above settings ensure that the airflow rate of the damper body 2 is not affected by the dust and impurities accumulated on the filter end. At the same time, only the drive end needs to be driven to clean the dust and impurities accumulated on the filter end. The whole operation process is also relatively convenient.

[0034] In one embodiment, the mobile filter assembly 3 includes a take-up roller 301, which is provided at both the top and bottom of the damper body 2. The take-up roller 301 is rotatably connected to the U-shaped cleaning frame 1. The top and bottom of the damper body 2 are provided with moving grooves 302. A mobile filter screen 303 is movably connected inside the moving grooves 302. The two ends of the mobile filter screen 303 are fixedly connected to two take-up rollers 301 respectively. A guide roller 304 is rotatably connected inside the U-shaped cleaning frame 1. The mobile filter screen 303 is disposed outside the guide roller 304.

[0035] By rotating the take-up roller 301, the take-up roller 301 can take up the movable filter screen 303. At this time, the movable filter screen 303 inside the air valve body 2 can continuously move to the inside of the C-shaped cleaning frame 1 through the moving groove 302. With the support of the guide roller 304, there is a moving distance between the movable filter screen 303 inside the C-shaped cleaning frame 1 and the top or bottom of the air valve body 2. This setting allows the flushing and sweeping assembly 4 to thoroughly clean the movable filter screen 303 inside the C-shaped cleaning frame 1.

[0036] In one embodiment, for the aforementioned take-up rollers 301, the shaft ends of the two take-up rollers 301 pass through the U-shaped cleaning frame 1 and are fixedly connected to a connecting sprocket 305. A connecting chain 306 meshes with the outer surface of the connecting sprocket 305. A storage box 307 is fixedly connected to the outer side of the U-shaped cleaning frame 1 corresponding to the connecting sprocket 305 and the connecting chain 306. A drive motor 308 is fixedly connected to the outer surface of the storage box 307. The output end of the drive motor 308 is fixedly connected to the shaft end of one of the take-up rollers 301.

[0037] One of the take-up rollers 301 is driven by a drive motor 308. The rotating take-up roller 301 drives the other take-up roller 301 to rotate synchronously through a connecting sprocket 305 and a connecting chain 306. At this time, one take-up roller 301 can take up the movable filter screen 303, and the other take-up roller 301 can continuously release the taken-up movable filter screen 303. This allows the movable filter screen 303 inside the air valve body 2 to continuously move into the U-shaped cleaning frame 1. The movable filter screen 303 inside the U-shaped cleaning frame 1 continuously moves into the air valve body 2. This setting allows the movable filter screen 303 to move synchronously into the air valve body 2 while cleaning the dust accumulated on it. This ensures that the movable filter screen 303 can always block the air valve body 2. This setting also allows the dust accumulated on the movable filter screen 303 to be cleaned normally when the flue gas is discharged.

[0038] In one embodiment, the flushing and cleaning assembly 4 includes flushing pipes 401, multiple flushing pipes 401 are arranged inside the U-shaped cleaning frame 1, a flushing plate 402 is fixedly installed on the inner wall of the U-shaped cleaning frame 1, a plurality of nozzles 403 are arranged on the outer surface of the flushing pipes 401 and the flushing plate 402, a diversion pipe 404 is arranged on the outer side of the U-shaped cleaning frame 1, the diversion pipe 404 is fixedly connected to the flushing pipes 401 and the flushing plate 402, and cleaning brushes 405 are fixedly connected to the top of the inner wall of the U-shaped cleaning frame 1 and the top of the air valve body 2, and the top and bottom of the air valve body 2 are arranged in the same way.

[0039] The diversion pipe 404 is connected to an external container for storing cleaning agents. When the moving filter 303 is being cleaned, the cleaning agent inside the container flows directly through the diversion pipe 404 into the flushing pipe 401. The nozzle 403 on the flushing pipe 401 sprays the cleaning agent directly onto the moving filter 303. As the moving filter 303 continues to move, the cleaning brush 405 scrubs the moistened moving filter 303, thereby removing accumulated dust and impurities. The cleaning agent sprayed from the nozzle 403 on the rinsing plate 402 can rinse the cleaning brush 405 and the moving filter 303 laterally. This allows the dust and impurities adhering to the cleaning brush 405 and the dust and impurities cleaned off the moving filter 303 to move directly to one side of the U-shaped cleaning frame 1 under the impact of the cleaning agent. The above configuration allows the dust and impurities on the moving filter 303 to be better removed from the moving filter 303 during cleaning.

[0040] In one embodiment, for the above-mentioned C-shaped cleaning frame 1, a support frame 406 is fixedly connected to the bottom of the C-shaped cleaning frame 1, a through groove 407 is opened at the top of the support frame 406, the through groove 407 extends into the interior of the C-shaped cleaning frame 1, a sewage collection box 408 is movably connected inside the through groove 407, and a baffle 409 is fixedly connected to the top of the air valve body 2.

[0041] Dust and impurities that move to one side of the C-shaped cleaning frame 1 under the rinsing of the cleaning agent can fall directly into the interior of the wastewater collection box 408 through the channel 407. This setting avoids the accumulation of wastewater formed by dust, impurities and cleaning agent inside the C-shaped cleaning frame 1. At the same time, the setting of the baffle 409 ensures that when the moving filter 303 is cleaned at the top of the air valve body 2, the wastewater generated will not flow into the interior of the air valve body 2 along the moving channel 302.

[0042] In one embodiment, the collection component 5 includes an inclined scraper 501, which is fixedly connected to the bottom of the inner wall of the damper body 2. A collection groove 502 is provided on one side of the inclined scraper 501. A storage frame 503 is fixedly connected to the bottom of the damper body 2 corresponding to the collection groove 502. An impurity collection box 504 is movably connected inside the storage frame 503. A pressure relief groove 505 is provided on one side of the storage frame 503. A pressure relief filter 506 is fixedly connected to the outside of the impurity collection box 504 corresponding to the pressure relief groove 505.

[0043] Dust and impurities filtered by the movable filter 303 can fall directly. Guided by the inclined scraper 501, the falling dust and impurities can fall into the collection trough 502. At this time, the dust and impurities can fall directly into the impurity collection box 504 under their own gravity. In the above configuration, when some flue gas drifts into the impurity collection box 504 through the collection trough 502, the flue gas can drift out from the inside of the impurity collection box 504 and the storage frame 503 through the pressure relief filter 506 and the pressure relief trough 505. This prevents the dust and impurities collected inside the impurity collection box 504 from drifting back into the air valve body 2 through the collection trough 502 under the blowing of the flue gas.

[0044] In one embodiment, the sealing assembly 6 includes a rotating shaft 601. Multiple rotating shafts 601 are rotatably connected inside the damper body 2. A sealing plate 602 is fixedly connected to the outer side of the rotating shaft 601. The top ends of several rotating shafts 601 penetrate the damper body 2 and are fixedly connected to a switch sprocket 603. A switch chain 604 is engaged on the outer surface of the switch sprocket 603. A mounting box 605 is fixedly installed on the top of the damper body 2 corresponding to the switch sprocket 603 and the switch chain 604. A switch motor 606 is fixedly installed on the top of the mounting box 605. The output end of the switch motor 606 is fixedly connected to one of the rotating shafts 601.

[0045] When it is necessary to discharge the flue gas inside the flue, the switching motor 606 drives one of the rotating shafts 601. The rotating shaft 601 drives all the rotating shafts 601 to rotate synchronously through the switching sprocket 603 and the switching chain 604. At this time, all the rotating shafts 601 can drive the corresponding sealing plate 602 to rotate, so that the sealing plate 602 no longer blocks and seals the port of the air valve body 2.

[0046] Through the above technical solution, 1. The filter end set on the movable filter assembly 3 filters dust and impurities in the flue gas. When a lot of dust and impurities accumulate on the filter end, the drive end drives the filter end, so that the filter end inside the damper body 2 can continuously move into the U-shaped cleaning frame 1, and the filter end inside the U-shaped cleaning frame 1 continuously moves into the damper body 2. During this process, the flushing and cleaning assembly 4 can flush and clean the dust accumulated on the filter end. The above settings ensure that the airflow rate of the damper body 2 is not affected by the dust and impurities accumulated on the filter end. At the same time, only the drive end needs to be driven to clean the dust and impurities accumulated on the filter end, and the whole operation process is relatively convenient; 2. The nozzle 403 on the flushing pipe 401 can directly spray the cleaning agent onto the movable filter 3. On the 03, as the moving filter 303 moves continuously, the cleaning brush 405 can scrub the moistened moving filter 303, removing the dust and impurities accumulated on it. Simultaneously, the cleaning agent sprayed from the nozzle 403 on the rinsing plate 402 can laterally rinse the cleaning brush 405 and the moving filter 303. This allows the dust and impurities adhering to the cleaning brush 405 and those removed from the moving filter 303 to move directly to one side of the U-shaped cleaning frame 1 under the impact of the cleaning agent, and then fall directly into the wastewater collection box 408 through the channel 407. This setup, through the synergistic effect of spraying moisture, brushing, and lateral rinsing, efficiently removes dust and impurities from the surface of the moving filter 303. This integrated design ensures the continuity and thoroughness of the cleaning process, significantly improving filter cleaning efficiency.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A smoke exhaust damper for easy cleaning, comprising a box-shaped cleaning frame (1), characterized in that, The inside of the C-shaped cleaning frame (1) is fixedly installed a damper body (2). A movable filter assembly (3) and a flushing and cleaning assembly (4) are provided between the C-shaped cleaning frame (1) and the damper body (2). A collection assembly (5) is provided on one side of the filter end of the movable filter assembly (3). A sealing assembly (6) is provided inside the damper body (2). The movable filter assembly (3) is used to filter dust and impurities in flue gas. At the same time, the movable filter assembly (3) can move between the U-shaped cleaning frame (1) and the air valve body (2) so that the flushing and cleaning assembly (4) can clean the dust and impurities accumulated on the filter end.

2. A damper according to claim 1, wherein, The movable filter assembly (3) includes a take-up roller (301), which is provided at the top and bottom of the air valve body (2). The take-up roller (301) is rotatably connected to the U-shaped cleaning frame (1). The top and bottom of the air valve body (2) are provided with movable grooves (302). A movable filter screen (303) is movably connected inside the movable groove (302). The two ends of the movable filter screen (303) are fixedly connected to two take-up rollers (301) respectively. A guide roller (304) is rotatably connected inside the U-shaped cleaning frame (1). The movable filter screen (303) is located on the outside of the guide roller (304).

3. A damper according to claim 2, wherein, The shaft ends of the two take-up rollers (301) pass through the U-shaped cleaning frame (1) and are fixedly connected to a connecting sprocket (305). A connecting chain (306) is engaged on the outer surface of the connecting sprocket (305). A storage box (307) is fixedly connected to the outer side of the U-shaped cleaning frame (1) corresponding to the connecting sprocket (305) and the connecting chain (306). A drive motor (308) is fixedly connected to the outer surface of the storage box (307). The output end of the drive motor (308) is fixedly connected to the shaft end of one of the take-up rollers (301).

4. A damper according to claim 1, wherein, The flushing and cleaning assembly (4) includes flushing pipes (401), multiple flushing pipes (401) are arranged inside the U-shaped cleaning frame (1), a flushing plate (402) is fixedly installed on the inner wall of the U-shaped cleaning frame (1), a number of nozzles (403) are arranged on the outer surface of the flushing pipes (401) and the flushing plate (402), a diversion pipe (404) is arranged on the outer side of the U-shaped cleaning frame (1), the diversion pipe (404) is fixedly connected to the flushing pipes (401) and the flushing plate (402), and a cleaning brush (405) is fixedly connected to the top of the inner wall of the U-shaped cleaning frame (1) and the top of the air valve body (2), and the top and bottom of the air valve body (2) are arranged in the same way.

5. A damper according to claim 4, wherein, The bottom of the U-shaped cleaning frame (1) is fixedly connected to a support frame (406), and the top of the support frame (406) is provided with a through groove (407). The through groove (407) extends into the interior of the U-shaped cleaning frame (1). A sewage collection box (408) is movably connected inside the through groove (407). A baffle (409) is fixedly connected to the top of the air valve body (2).

6. A damper according to claim 1, wherein, The collection component (5) includes an inclined scraper (501), which is fixedly connected to the bottom of the inner wall of the air valve body (2). A collection groove (502) is provided on one side of the inclined scraper (501). A storage frame (503) is fixedly connected to the bottom of the air valve body (2) corresponding to the collection groove (502). An impurity collection box (504) is movably connected inside the storage frame (503). A pressure relief groove (505) is provided on one side of the storage frame (503). A pressure relief filter (506) is fixedly connected to the outside of the impurity collection box (504) corresponding to the pressure relief groove (505).

7. A damper according to claim 1, wherein, The sealing assembly (6) includes a rotating shaft (601), which is rotatably connected to multiple shafts inside the air valve body (2). A sealing plate (602) is fixedly connected to the outside of the rotating shaft (601). The top ends of several rotating shafts (601) penetrate the air valve body (2) and are fixedly connected to a switch sprocket (603). A switch chain (604) is engaged on the outer surface of the switch sprocket (603). A mounting box (605) is fixedly installed on the top of the air valve body (2) corresponding to the switch sprocket (603) and the switch chain (604). A switch motor (606) is fixedly installed on the top of the mounting box (605). The output end of the switch motor (606) is fixedly connected to one of the rotating shafts (601).

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