Air filter with self-sealing device

Abstract

The invention relates to the field of air filters, in particular to an air filter with a self-sealing device. The ventilation device comprises a ventilation barrel, a plugging plate, a filter element assembly and a linkage mechanism, an air inlet and an air outlet are formed in the two ends of the ventilator in the horizontal direction respectively, the ventilator is provided with a penetrating opening penetrating through the top of the ventilator in the vertical direction and a sliding way penetrating through the whole ventilator, and the penetrating opening is located between the air inlet and the sliding way. The plugging plate is vertically and slidably arranged at the insertion opening; the filter element assembly is slidably arranged at the slideway and comprises a filter element; when the filter element is in a filtering state, the filter element blocks the middle of the slideway, and the bottom end of the plugging plate is flush with the bottom end of the insertion opening; when the filter element is in a replacement state, the filter element moves upwards and is exposed from the top of the slide way, and the blocking plate blocks the inner side of the ventilator; and the linkage mechanism is in transmission connection with the filter element assembly and the plugging plate. During normal use, air circulation cannot be interfered so as to ensure the utilization rate of the filter element, and air circulation in the ventilation barrel can be automatically closed when the filter element is replaced.

Description

Technical Field

[0001] The invention relates to the field of air filters, in particular to an air filter with a self-sealing device. Background Art

[0002] Air filters are generally used in workshops, factories, laboratories and other environments, or for dust prevention of electronic machinery and communication equipment. When replacing the filter element, in order to reduce the pollution to the external environment, the air filter needs to be blocked. After the filter element is replaced, the blockage can be removed.

[0003] Chinese patent announcement number CN218306845U discloses an air filter with a self-sealing device, including an air filter body, a threaded rotating rod is threadedly connected to the air filter body, a rotating disk is fixed on the threaded rotating rod, one end of the rotating disk is rotatably connected to a connecting rod, the other end of the connecting rod is hinged to a hinge seat, a slide is fixed to the outside of the hinge seat, and the slide is slidably arranged on the inner wall of the air filter body. The threaded rotating rods on both sides are rotated to make the air filter body drive the rotating disk to rotate, so that the connecting rod moves to the right and rotates along the hinge seat until the plug is inserted into the through port to close the air filter; unscrew the bolts, and pull the filter frame on the connecting plate out of the air filter to facilitate cleaning of the filter frame. After cleaning, the filter frame is inserted into the air filter and fixed in the air filter by bolts.

[0004] However, the above technical solution has the following shortcomings:

[0005] The structures such as plug blocks and fixing plates used to seal the air filter are all located inside the air filter body. When the air filter is not sealed and in normal use, the air circulation will be affected, and the air can only flow from the opening to the filter frame. Only the area on the filter frame that is aligned with the opening can be effectively filtered, and the rest of the area is not effectively utilized, resulting in low utilization of the filter frame. Summary of the invention

[0006] The purpose of the present invention is to address the problems existing in the background technology and to propose an air filter with a self-sealing device which will not interfere with air circulation during normal use to ensure the utilization rate of the filter element and can automatically close the air circulation in the ventilator when the filter element is replaced.

[0007] The technical solution of the present invention is an air filter with a self-sealing device, comprising a ventilator, a sealing plate, a filter element assembly and a linkage mechanism; the two ends of the ventilator in the horizontal direction are respectively an air inlet and an air outlet, and are provided with an insertion opening that penetrates the top of the ventilator in the vertical direction and a slide that penetrates the ventilator as a whole, and the insertion opening is located between the air inlet and the slide; the sealing plate is vertically slidably arranged at the insertion opening; the filter element assembly is slidably arranged at the slide, and comprises a filter element; when the filter element is in a filtering state, the filter element is blocked in the middle of the slide, and the bottom end of the sealing plate is flush with the bottom end of the insertion opening; when the filter element is in a replacement state, the filter element moves up and emerges from the top of the slide, and the sealing plate blocks the inner side of the ventilator; the linkage mechanism is transmission-connected to the filter element assembly and the sealing plate.

[0008] Preferably, two limit plates are symmetrically arranged on the top of the ventilation cylinder, and a sliding channel for the blocking plate to slide is formed between the two limit plates.

[0009] Preferably, the filter element includes a filter element frame and a core body installed on the inner side of the filter element frame, and a horizontal surface of one side of the filter element frame has an outwardly extending positioning platform. The filter element assembly also includes a sliding frame vertically slidably arranged on the slide and a top plate horizontally arranged on the top of the sliding frame. A horizontal surface of one side of the sliding frame has a positioning groove for the positioning platform to be inserted into, and the projected size of the top plate is larger than the opening size of the top end of the slide.

[0010] Preferably, both ends of the ventilator protrude outward at the slide in the width direction, and when the core is located at the filtering position inside the ventilator, the core is centered with the ventilator and the outer contour edge of the core is flush with the inner wall of the middle of the ventilator.

[0011] Preferably, a fixed platform is provided at the top of the ventilation duct, and a second sliding rod is horizontally slidably provided on the fixed platform, and the two ends of the second sliding rod are respectively connected to a push-pull plate and a clamping platform, and the outer periphery of the second sliding rod is provided with a second spring respectively connected to the fixed platform and the clamping platform at both ends, and the outer end of the clamping platform has a downward inclined surface, and the bottom of the sliding frame has a clamping groove for the clamping platform to be clamped in, and a limit rod that can block the top plate is rotatably provided on the top of the clamping platform.

[0012] Preferably, a handle is provided on the top of the top plate.

[0013] Preferably, a lifting mechanism for driving the top plate to rise and fall is provided on the ventilation cylinder.

[0014] Preferably, the linkage mechanism includes a connecting plate arranged on the top of the blocking plate and two groups of symmetrically arranged linkage components, the linkage component includes a belt, two groups of pulley components respectively arranged at the top and bottom of the ventilation cylinder, a first connecting frame whose two ends are respectively connected to the top plate and one side of the belt, and a second connecting frame whose two ends are respectively connected to the connecting plate and the other side of the belt, the pulley assembly includes a bracket arranged on the ventilation cylinder and a pulley rotatably arranged on the bracket, and the belt is sleeved on the two pulleys in the same group of linkage components.

[0015] Preferably, a guide plate is provided at the bottom of the second connecting frame, and a first sliding rod is provided on the guide plate for horizontal sliding, and end plates and vibration strips are respectively connected at both ends of the first sliding rod, and a first spring is respectively sleeved on the outer periphery of the first sliding rod, and two ends of the first spring are respectively connected to the guide plate and the vibration strip, and the vibration strip is vertically distributed, and has multiple "V"-shaped grooves distributed side by side along the vertical direction on the vibration bar, and a third connecting frame is connected to the bottom end of the vibration bar, and a dust collecting seat is provided at the bottom of the ventilation duct, and the dust collecting seat is located below the slide, and the dust collecting seat is connected to the third connecting frame; vibration tables are provided on both sides of the ventilation duct, and the vibration tables have "V"-shaped surfaces that match the "V"-shaped grooves on the vibration bar.

[0016] Preferably, both sides of the top of the dust collecting seat have dust collecting surfaces inclined toward the middle, and the middle has a dust collecting channel running through from top to bottom.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention will not interfere with the air circulation inside the ventilator during normal use. The air can flow to various areas on the core body, thereby ensuring the utilization rate of the filter element. When the filter element is replaced, the blocking plate can be automatically sealed in the ventilator through the linkage mechanism, making the filter element replacement process more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the filter element in the embodiment of the present invention when it is in the filtering state;

[0020] Figure 2 for Figure 1 A partial structural cross-sectional view;

[0021] Figure 3 This is a schematic diagram of the structure when replacing the filter element according to an embodiment of the present invention;

[0022] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0023] Figure 5 for Figure 3 A magnified view of the structure at B in the middle;

[0024] Figure 6 It is the exploded view of the cross-section structure of the ventilator and the dust collecting seat;

[0025] Figure 7 It is a structural exploded view of the top plate, sliding frame, handle, filter element frame and core body.

[0026] 10. The ventilator is provided with a filter element having a plurality of filter elements, and a plurality of filter elements are provided with filter elements. The filter element has a plurality of filter elements, and a plurality of filter elements are provided with filter elements. The filter element has a plurality of filter elements, and a plurality of filter elements are provided with filter elements. DETAILED DESCRIPTION

[0027] Embodiment 1

[0028] like Figure 1-Figure 7 As shown, an air filter with a self-sealing device proposed in this embodiment includes a ventilation tube 1, a sealing plate 14, a filter element assembly and a linkage mechanism.

[0029] like Figure 1 and Figure 6 As shown, the two ends of the ventilator 1 in the horizontal direction are respectively an air inlet 101 and an air outlet 102, and there are a through hole 104 penetrating the top of the ventilator 1 in the vertical direction and a slideway 103 penetrating the ventilator 1 as a whole, and the through hole 104 is located between the air inlet 101 and the slideway 103. The air entering the ventilator 1 from the air inlet 101 first passes through the area below the through hole 104, then passes through the slideway 103 area, and finally is discharged from the air outlet 102.

[0030] The blocking plate 14 is vertically slidably arranged at the insertion opening 104 , and can block the air flow inside the ventilator 1 by sliding down to the extreme position, and release the blockage of the ventilator 1 when sliding up to the extreme position.

[0031] The filter element assembly is slidably arranged on the slideway 103, and includes a filter element, a slide frame 3 vertically slidably arranged on the slideway 103, and a top plate 2 horizontally arranged on the top of the slide frame 3. The filter element includes a filter element frame 5 and a core body 6 installed inside the filter element frame 5. When replacing the filter element, the assembled filter element frame 5 and core body 6 are replaced as a whole.

[0032] When the filter element is in the filtering state, the filter element is blocked in the middle of the slideway 103, and the bottom end of the blocking plate 14 is flush with the bottom end of the insertion port 104. In the absence of external force, the weight of the filter element assembly reaches a level that allows the filter element assembly to maintain the filtering state, and the filter element is located inside the ventilator 1 to filter the air. When the filter element is in the replacement state, the filter element moves up and emerges from the top of the slideway 103, and the blocking plate 14 blocks the inside of the ventilator 1.

[0033] Two limit plates 15 are symmetrically arranged on the top of the ventilator 1, and a sliding channel for the blocking plate 14 to slide is formed between the two limit plates 15, which can further guide the sliding process of the blocking plate 14 so that the blocking plate 14 can slide accurately in the vertical direction. When the filter element is in the filtering state, the blocking plate 14 is in a position where the ventilator 1 is not blocked. The protection of the limit plates 15 on both sides can also prevent the blocking plate 14 from dust accumulation, thereby improving the cleanliness of the blocking plate 14.

[0034] One side surface of the filter element frame 5 in the horizontal direction has an outwardly projecting positioning platform 501, and the positioning platform 501 has a through hole. One side surface of the sliding frame 3 in the horizontal direction has a positioning groove 301 for the positioning platform 501 to be inserted into, and the bottom of the positioning groove 301 has a threaded hole. When installing the filter element frame 5, the positioning platform 501 is inserted into the positioning groove 301, and the bolt passes through the through hole and is threadedly connected with the threaded hole. The head of the bolt is in the positioning groove 301 and will not protrude from the sliding frame 3. After installation, the side surface of the core body 6 facing the air is flush with the side surface of the filter element frame 5 and the side surface of the sliding frame 3. The projection size of the top plate 2 is larger than the top opening size of the slideway 103. When the sliding frame 3 slides downward to the extreme position, the top plate 2 blocks the top opening of the slideway 103.

[0035] The two ends of the ventilator 1 in the width direction at the slide 103 protrude outward. When the core 6 is located at the filtering position inside the ventilator 1, the core 6 is centered with the ventilator 1 and the outer contour edge of the core 6 is flush with the inner wall of the middle part of the ventilator 1, that is, the core 6 is not blocked by the ventilator 1, and the air will not be unable to be effectively filtered due to the small size of the core 6. The size of the core 6 is just suitable for the air circulation range. When the air flows to the core 6, it can flow to various areas of the core 6, thereby ensuring a balanced filtering effect and utilization rate.

[0036] like Figure 2-Figure 4 As shown, the linkage mechanism is transmission-connected with the filter element assembly and the sealing plate 14, so that the filter element assembly and the sealing plate 14 move simultaneously in opposite directions. When the filter element assembly moves up for replacement, the sealing plate 14 moves down to seal on the inner side of the ventilation tube 1. After the filter element in the filter element assembly is replaced, when the filter element assembly moves down, the sealing plate 14 moves up to release the blockage.

[0037] This embodiment will not interfere with the air circulation inside the ventilation duct 1 during normal use. The air can circulate to various areas on the core 6, thereby ensuring the utilization rate of the filter element. When replacing the filter element, the blocking plate 14 can be driven by the linkage mechanism to automatically seal in the ventilation duct 1. Two processes can be performed in one operation, and the filter element replacement process is more convenient.

[0038] Embodiment 2

[0039] like Figure 1-Figure 7As shown, an air filter with a self-sealing device proposed in this embodiment, compared with the first embodiment, in this embodiment, a fixed platform 23 is provided at the top of the ventilating tube 1, a second slide bar 24 is horizontally slidably provided on the fixed platform 23, a push-pull plate 25 and a card platform 26 are respectively connected at both ends of the second slide bar 24, and a second spring 27 is sleeved on the outer periphery of the second slide bar 24 at both ends respectively connected to the fixed platform 23 and the card platform 26, the outer end of the card platform 26 has an inclined surface inclined downward, and the bottom of the sliding frame 3 has a card slot 302 for the card platform 26 to be inserted. A limit rod 28 that can block the top of the top plate 2 is rotatably provided at the top of the card platform 26. When the filter element is in normal use, the top plate 2 is placed on the top of the ventilating tube 1. By rotating the limit rod 28, the limit rod 28 can be blocked above the top plate 2, keeping the position of the top plate 2 stable, thereby keeping the position of the core body 6 stable, and the core body 6 performs effective air filtration on the inner side of the ventilating tube 1.

[0040] When replacing the filter element, the limit rod 28 is turned away from the top plate 2, and the top plate 2 is moved up. The top plate 2 drives the sliding frame 3 and the filter element to move up. The side of the sliding frame 3 slides on the outer end of the card platform 26, and the second spring 27 is in a compressed state. When the sliding frame 3 moves up to the height of the card slot 302 toward the card platform 26, the card platform 26 is pushed forward by the second spring 27, and the outer end of the card platform 26 is inserted into the card slot 302. At this time, the filter element is completely exposed from the slideway 103, and the position of the sliding frame 3 and the filter element is stable. The user can conveniently disassemble and replace the filter element. After the filter element is replaced, pull the push-pull plate 25 outward, move the card platform 26 out of the card slot 302, put down the top plate 2, and then rotate the limit rod 28 again to block the top of the top plate 2.

[0041] like Figure 1-Figure 3 As shown, a handle 4 is provided on the top of the top plate 2, and the user can hold the handle 4 to lift and lower the top plate 2, which is convenient to operate. Furthermore, a lifting mechanism for driving the top plate 2 to be lifted and lowered is provided on the ventilator 1. The lifting mechanism can adopt a structure capable of realizing linear drive, such as an electric push rod or a cylinder, and the lifting mechanism can be controlled by an external control switch to raise or lower the top plate 2, which is more labor-saving.

[0042] This embodiment can assist in limiting the position of the filter element assembly, facilitate the replacement of the filter element, reduce the labor involved in replacing the filter element, and improve replacement efficiency.

[0043] Embodiment 3

[0044] like Figure 1-Figure 7As shown, the present embodiment proposes an air filter with a self-sealing device. Compared with the first embodiment, in the present embodiment, the linkage mechanism includes a connecting plate 13 arranged on the top of the blocking plate 14 and two groups of symmetrically arranged linkage components. The linkage component includes a belt 10, two groups of pulley components respectively arranged at the top and bottom of the ventilation tube 1, a first connecting frame 11 whose two ends are respectively connected to the top plate 2 and one side of the belt 10, and a second connecting frame 12 whose two ends are respectively connected to the connecting plate 13 and the other side of the belt 10, the pulley component includes a bracket 9 arranged on the ventilation tube 1 and a pulley 8 rotatably arranged on the bracket 9, and the belt 10 is sleeved on the two pulleys 8 in the same group of linkage components. When the top plate 2 moves upward, the belt 10 is driven to operate through the first connecting frame 11, and the belt 10 drives the two pulleys 8 to rotate. The belt 10 drives the second connecting frame 12 to move downward on the other side, and the second connecting frame 12 drives the blocking plate 14 to move downward through the connecting plate 13. When the blocking plate 14 reaches the blocking position, the filter element is completely exposed from above the slideway 103, but the sliding frame 3 has not been separated from the slideway 103. The blocking plate 14 limits the movement range of the sliding frame 3 to prevent the sliding frame 3 from slipping. Similarly, when the filter element is replaced and the sliding frame 3 is moved downward, the top plate 2 is placed on the top of the ventilation tube 1, limiting the movement range of the blocking plate 14 to prevent the blocking plate 14 from detaching upward from the insertion port 104, but making the bottom end of the blocking plate 14 flush with the inner wall of the ventilation tube 1 to ensure smooth air circulation.

[0045] For the pulley 8 and the belt 10, corresponding synchronous pulleys and synchronous belts can be selected to improve the stability of power transmission during linkage and prevent the pulley 8 and the belt 10 from slipping.

[0046] A guide plate 17 is provided at the bottom of the second connecting frame 12, and a first slide bar 18 is provided on the guide plate 17 for horizontal sliding. The first slide bar 18 is respectively connected to an end plate 19 and a vibration bar 20 at both ends. The outer periphery of the first slide bar 18 is sleeved with a first spring 21 connected to the guide plate 17 and the vibration bar 20 at both ends. The vibration bar 20 is vertically distributed, and the bottom end of the vibration bar 20 is connected to the third connecting frame 22. The bottom of the ventilator 1 has a dust collecting seat 7, which is located below the slideway 103, and the dust collecting seat 7 is connected to the third connecting frame 22. When the top plate 2 moves up, the blocking plate 14 moves down, the second connecting frame 12 drives the guide plate 17 to move down, and the guide plate 17 drives the first slide bar 18, the vibration bar 20, the third connecting frame 22 and the dust collecting seat 7 to move down, so that the user can clean up the dust remaining on the dust collecting seat 7.

[0047] like Figure 3 and Figure 4As shown, the vibration bar 20 has a plurality of "V"-shaped grooves arranged side by side in the vertical direction, and a vibration table 16 is provided on both sides of the ventilating tube 1, and the vibration table 16 has a "V"-shaped surface adapted to the "V"-shaped groove on the vibration bar 20. When the vibration bar 20 just starts to move downward, it will first move vertically, and the dust collecting seat 7 will move vertically, and the dust collecting seat 7 will move downward from the bottom of the ventilating tube 1. As the vibration bar 20 continues to move downward, the plurality of "V"-shaped grooves on the vibration bar 20 will contact the "V"-shaped surface of the vibration table 16 in turn, and the vibration bar 20 will move horizontally and compress the first spring 21 when pushed by the vibration table 16, and then the first spring 21 will push the vibration bar 20 to move in the opposite direction, so that the vibration bar 20 will simultaneously reciprocate horizontally when moving vertically, and the dust collecting seat 7 will also have reciprocating vibration when moving vertically, which can shake off the dust accumulated on the dust collecting seat 7, and the user needs to place a trash can below in advance to receive the dust.

[0048] Both sides of the top of the dust collecting seat 7 have dust collecting surfaces 701 inclined toward the middle, and the middle has a dust collecting channel 702 that runs through from top to bottom. The two dust collecting surfaces 701 are respectively located on the front and back sides of the filter element, which may cause dust to fall when the filter element is in the filtering state and when the user replaces the filter element, and the dust falls downward onto the dust collecting surfaces 701. Therefore, the dust is shaken off by moving the dust collecting seat 7 downward and vibrating it. Most of the dust on the dust collecting seat 7 falls through the dust collecting channel 702. After the filter element is replaced, the blocking plate 14 moves up, the dust collecting seat 7 moves up and connects with the slide 103 at the bottom of the ventilator 1, and the sliding frame 3 is inserted in the dust collecting channel 702, and the overall structure is regular.

[0049] This embodiment uses a linkage mechanism to link the filter element assembly and the blocking plate 14 to achieve synchronous movement. In addition, a structure that can remove dust by vibration is added to shake off the dust on the dust drop seat 7, thereby improving the cleanliness of the entire air filter after the filter element is replaced.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An air filter with a self-sealing device, characterized in that: include: A ventilator (1) having an air inlet (101) and an air outlet (102) at two ends in the horizontal direction, and having a through hole (104) penetrating the top of the ventilator (1) in the vertical direction and a slideway (103) penetrating the entire ventilator (1), wherein the through hole (104) is located between the air inlet (101) and the slideway (103); A blocking plate (14) vertically slidably disposed at the insertion opening (104); A filter element assembly is slidably arranged on the slideway (103), comprising a filter element; when the filter element is in a filtering state, the filter element is blocked in the middle of the slideway (103), and the bottom end of the blocking plate (14) is flush with the bottom end of the insertion opening (104); when the filter element is in a replacement state, the filter element moves upward and emerges from the top of the slideway (103), and the blocking plate (14) blocks the inner side of the ventilation tube (1); A linkage mechanism is drivingly connected to the filter element assembly and the blocking plate (14).

2. An air filter with a self-sealing device according to claim 1, characterized in that: Two limiting plates (15) are symmetrically arranged on the top of the ventilation cylinder (1), and a sliding channel for the blocking plate (14) to slide is formed between the two limiting plates (15).

3. An air filter with a self-sealing device according to claim 1, characterized in that: The filter element comprises a filter element frame (5) and a core body (6) installed inside the filter element frame (5); a horizontal side surface of the filter element frame (5) is provided with an outwardly extending positioning platform (501); the filter element assembly also comprises a sliding frame (3) vertically slidably arranged at a slideway (103) and a top plate (2) horizontally arranged at the top end of the sliding frame (3); a horizontal side surface of the sliding frame (3) is provided with a positioning groove (301) for the positioning platform (501) to be inserted into; and a projection size of the top plate (2) is larger than a size of an opening at the top end of the slideway (103).

4. An air filter with a self-sealing device according to claim 3, characterized in that: The two ends of the ventilator (1) in the width direction at the slideway (103) protrude outwards, and when the core (6) is located at the filtering position inside the ventilator (1), the core (6) and the ventilator (1) are centered and aligned, and the outer contour edge of the core (6) is flush with the inner wall of the middle part of the ventilator (1).

5. An air filter with a self-sealing device according to claim 3, characterized in that: A fixed platform (23) is arranged at the top of the ventilation duct (1), a second slide bar (24) is arranged on the fixed platform (23) for horizontal sliding, two ends of the second slide bar (24) are respectively connected to a push-pull plate (25) and a clamping platform (26), a second spring (27) is sleeved on the outer periphery of the second slide bar (24), two ends of which are respectively connected to the fixed platform (23) and the clamping platform (26), the outer end of the clamping platform (26) has an inclined surface inclined downward, the bottom of the sliding frame (3) has a clamping groove (302) for the clamping platform (26) to be clamped, and a limit rod (28) capable of blocking above the top plate (2) is rotatably arranged on the top of the clamping platform (26).

6. An air filter with a self-sealing device according to claim 5, characterized in that: A handle (4) is provided on the top of the top plate (2).

7. An air filter with a self-sealing device according to claim 6, characterized in that: The ventilation cylinder (1) is provided with a lifting mechanism for driving the top plate (2) to rise and fall.

8. An air filter with a self-sealing device according to claim 3, characterized in that: The linkage mechanism comprises a connecting plate (13) arranged on the top of a blocking plate (14) and two groups of symmetrically arranged linkage components, the linkage components comprising a belt (10), two groups of pulley components respectively arranged on the top and bottom of a ventilating duct (1), a first connecting frame (11) having two ends respectively connected to the top plate (2) and one side of the belt (10), and a second connecting frame (12) having two ends respectively connected to the connecting plate (13) and the other side of the belt (10), the pulley component comprising a bracket (9) arranged on the ventilating duct (1) and a pulley (8) rotatably arranged on the bracket (9), and the belt (10) is sleeved on two pulleys (8) in the same group of linkage components.

9. An air filter with a self-sealing device according to claim 8, characterized in that: A guide plate (17) is arranged at the bottom of the second connecting frame (12), a first slide bar (18) is arranged on the guide plate (17) for horizontal sliding, the two ends of the first slide bar (18) are respectively connected to the end plate (19) and the vibration bar (20), the outer periphery of the first slide bar (18) is sleeved with a first spring (21) whose two ends are respectively connected to the guide plate (17) and the vibration bar (20), the vibration bar (20) is vertically distributed, and the vibration bar (20) has a plurality of "V"-shaped grooves arranged side by side in the vertical direction, the bottom end of the vibration bar (20) is connected to the third connecting frame (22), the bottom of the ventilation duct (1) has a dust collecting seat (7), the dust collecting seat (7) is located below the slideway (103), and the dust collecting seat (7) is connected to the third connecting frame (22); both sides of the ventilation duct (1) are provided with an excitation platform (16), and the excitation platform (16) has a "V"-shaped surface adapted to the "V"-shaped groove on the vibration bar (20).

10. An air filter with a self-sealing device according to claim 9, characterized in that: Both sides of the top of the dust collecting seat (7) are provided with dust collecting surfaces (701) inclined toward the middle, and the middle is provided with a dust collecting channel (702) penetrating from top to bottom.

Images