CN217635984U

CN217635984U - Prevent refrigeration air conditioning equipment of jam

Info

Publication number: CN217635984U
Application number: CN202221588111.5U
Authority: CN
Inventors: 马丽英
Original assignee: Tianjin Mingshijie Refrigeration Equipment Engineering Co ltd
Current assignee: Tianjin Mingshijie Refrigeration Equipment Engineering Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-10-21
Anticipated expiration: 2032-06-23

Abstract

The utility model discloses a prevent refrigeration air conditioning equipment of jam, including refrigeration air conditioning equipment main part, the air inlet end fixed mounting of refrigeration air conditioning equipment main part has the rectangle suction hood, is provided with the filter screen in the rectangle suction hood, has seted up the slot on the bottom inner wall of rectangle suction hood, and the bottom slidable mounting of filter screen has the rectangle frame in the slot, and the top fixed mounting of rectangle suction hood has seted up the through-hole on the top inner wall of rectangle suction hood, and the through-hole is linked together with the rectangle frame is inside, and the top of filter screen runs through-hole and fixed mounting has the connecting plate. The utility model relates to a rationally, the practicality is good, can carry out self-cleaning ash removal to the filter screen surface, avoids the filtration pore blocking on the filter screen, has improved the gas permeability of filter screen, guarantees refrigeration air conditioning equipment main part steady operation, can dismantle fast moreover and install fast fixedly to the filter screen, the simple operation to only need bare-handed operation just can realize the quick assembly disassembly operation to the filter screen.

Description

Anti-blocking refrigeration air conditioning equipment

Technical Field

The utility model relates to a refrigeration air conditioning equipment technical field specifically is a prevent refrigeration air conditioning equipment of jam.

Background

The refrigerating and air conditioning equipment is used for adjusting and controlling parameters such as temperature, humidity, flow rate and the like of ambient air in a building or a structure, is an indispensable part of people in modern life, and mainly comprises a compressor, an expansion valve, an evaporator, a condenser, accessories, pipelines and the like.

Nowadays, the refrigeration air-conditioning equipment's application field is more extensive, in summer, people drive the car and open refrigeration air-conditioning equipment and go on the in-process of traveling, it gets into in the carriage to inhale outside air, because contain dust impurity in the air among the external environment, the last filter screen that can install of refrigeration air-conditioning equipment intercepts the dust impurity in the air and filters, however, most refrigeration air-conditioning equipment is last not to have the function of cleaning the deashing to the filter screen surface, when refrigeration air-conditioning equipment was used for a long time, the dust impurity that the filter screen surface was gathered can be more and more, and then can cause the filtration pore blocking on the filter screen, lead to the gas permeability of filter screen to worsen, influence the inside efficiency of air admission refrigeration air-conditioning equipment, lead to refrigeration air-conditioning equipment can not steady operation, and the filter screen utilizes a plurality of screw installation to fix on refrigeration air-conditioning equipment usually, need to use specialized tool such as spanner to dismantle and the installation fixed to the filter screen, and the screw easily takes place corrosion or smooth silk, lead to the dismantlement and installation fixed inconvenience of filter screen, for this reason, we propose a refrigeration air-conditioning equipment for solving above-mentioned anti-clogging problem.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a prevent refrigeration air conditioning equipment of jam has solved refrigeration air conditioning equipment and has not had the function of cleaning the ash removal to the filter screen surface, cause the filtration pore on the filter screen to block up easily, lead to the gas permeability variation of filter screen, influence the inside efficiency of air admission refrigeration air conditioning equipment, lead to refrigeration air conditioning equipment can not the steady operation, and the filter screen utilizes a plurality of screw installations to fix on refrigeration air conditioning equipment usually, be not convenient for dismantle fast and install fixed problem fast to the filter screen.

(II) technical scheme

In order to achieve the above purpose, the utility model provides a following technical scheme: an anti-blocking refrigeration air conditioning device comprises a refrigeration air conditioning device main body, wherein a rectangular air inlet cover is fixedly mounted at the air inlet end of the refrigeration air conditioning device main body, a filter screen is arranged in the rectangular air inlet cover, an insertion groove is formed in the inner wall of the bottom of the rectangular air inlet cover, the bottom of the filter screen is slidably mounted in the insertion groove, a rectangular frame is fixedly mounted at the top of the rectangular air inlet cover, a through hole is formed in the inner wall of the top of the rectangular air inlet cover and communicated with the inside of the rectangular frame, a connecting plate penetrates through the through hole at the top of the filter screen and is fixedly mounted at the top of the connecting plate, and a T-shaped rod is fixedly mounted at the top of the connecting plate;

the left side and the right side of connecting plate have all been seted up the draw-in groove, are provided with on the rectangle frame and clamp the subassembly, are provided with clean subassembly in the rectangle air inlet cover.

Preferably, the clamping assembly comprises two clamping rods, two pull plates and two springs, sliding holes are formed in the inner wall of the left side and the inner wall of the right side of the rectangular frame, the two clamping rods are slidably mounted in the corresponding sliding holes respectively, the two ends of each clamping rod extend to the outside of the sliding holes respectively, one ends, close to each other, of the two clamping rods are slidably mounted in the corresponding clamping grooves respectively, the two pull plates are fixedly mounted at one ends, far away from each other, of the two clamping rods, the one ends, close to each other, of the two springs are fixedly connected with the outer wall of the left side and the outer wall of the right side of the rectangular frame respectively, one ends, far away from each other, of the two springs are fixedly connected with the corresponding pull plates respectively, and the two springs are sleeved on the corresponding clamping rods respectively.

Preferably, two positioning grooves are formed in the bottom of the connecting plate, the filter screen is located between the two positioning grooves, two positioning rods are fixedly mounted at the top of the rectangular air inlet cover, and the top ends of the two positioning rods are respectively slidably mounted in the corresponding positioning grooves.

Preferably, the inner side wall of the slot is fixedly provided with a lower sealing strip, the inner wall of the through hole is fixedly provided with an upper sealing strip, and the lower sealing strip and the upper sealing strip are in sliding contact with the filter screen.

Preferably, clean subassembly includes the motor, reciprocal lead screw, the axle bed, the sliding seat, the brush board, the brush hair and perpendicular guide arm, motor fixed mounting is on the top inner wall of rectangle air inlet cover and is located the right side of filter screen, the top of reciprocal lead screw and the output shaft fixed connection of motor, axle bed fixed mounting is on the bottom inner wall of rectangle air inlet cover, the bottom and the axle bed of reciprocal lead screw rotate to be connected, the sliding seat screw thread cup joints on reciprocal lead screw, brush board fixed mounting is in the left side of sliding seat, brush hair fixed mounting is on the left side wall of brush board, the brush hair has the filter screen to contact, it is in the right side of reciprocal lead screw to erect guide arm fixed mounting in rectangle air inlet cover and be located, sliding seat sliding sleeve establishes on perpendicular guide arm.

Preferably, the vertical guide rod is fixedly provided with two limiting rods, and the movable seat is positioned between the two limiting rods.

Preferably, the bottom fixed mounting of rectangle inlet hood has the dust-collecting box, the top of dust-collecting box is the opening structure, fixed mounting has the dust deflector that the slope set up on the bottom inner wall of rectangle inlet hood, the dust deflector is located the right side of filter screen, the top of dust deflector and the right side sliding contact of filter screen, the hole that falls has been seted up on the bottom inner wall of rectangle inlet hood, the hole that falls is located between dust deflector and the axle bed, the hole that falls is linked together with the dust-collecting box is inside, the rectangle clearance hole has been seted up on the right side inner wall of dust-collecting box, the downthehole movable mounting of rectangle clearance has the rectangle rubber buffer.

(III) advantageous effects

The utility model provides a prevent refrigeration air conditioning equipment of jam. The method has the following beneficial effects:

(1) This prevent refrigeration air conditioning equipment of jam through the connection cooperation that utilizes clean subassembly, can carry out self-cleaning ash removal to the filter screen surface, avoids the dust gathering more and causes the filtration pore blocking phenomenon on the filter screen to take place on the filter screen surface, and then can improve the gas permeability of filter screen, guarantees refrigeration air conditioning equipment main part steady operation.

(2) This prevent refrigeration air conditioning equipment of jam through utilizing leading the dirt board, can make the dust that cleans down smoothly drop to the collection storage in the dust collecting box, through regularly pulling out the rectangle rubber buffer, can clear up the dust in the dust collecting box.

(3) This prevent refrigeration air conditioning equipment of jam, through the connection cooperation that utilizes the cassette subassembly, be convenient for dismantle fast and install fixedly fast the filter screen to only need bare-handed operation just can realize the quick assembly disassembly operation to the filter screen.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic sectional view of the front view of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is an enlarged schematic view of a portion B in fig. 2.

In the figure: 1. a refrigeration air-conditioning apparatus main body; 2. a rectangular air intake hood; 3. a filter screen; 4. a slot; 5. a rectangular frame; 6. a connecting plate; 7. a T-shaped rod; 8. a card slot; 9. a clamping rod; 10. pulling a plate; 11. a spring; 12. positioning a rod; 13. a motor; 14. a reciprocating screw; 15. a shaft seat; 16. a movable seat; 17. brushing a plate; 18. brushing; 19. a vertical guide rod; 20. a dust collecting box; 21. a dust guide plate; 22. ash falling holes; 23. rectangular cleaning holes; 24. rectangular rubber buffer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention, and in the description of the present invention, "plurality" means two or more unless specifically defined otherwise.

As shown in fig. 1-4, the utility model provides a technical solution: an anti-blocking refrigeration air-conditioning device comprises a refrigeration air-conditioning device main body 1, wherein a rectangular air inlet cover 2 is fixedly installed at the air inlet end of the refrigeration air-conditioning device main body 1, a filter screen 3 is arranged in the rectangular air inlet cover 2, a slot 4 is formed in the inner wall of the bottom of the rectangular air inlet cover 2, the bottom of the filter screen 3 is slidably installed in the slot 4, a rectangular frame 5 is fixedly installed at the top of the rectangular air inlet cover 2, a through hole is formed in the inner wall of the top of the rectangular air inlet cover 2 and communicated with the inside of the rectangular frame 5, the top of the filter screen 3 penetrates through the through hole and is fixedly provided with a connecting plate 6, a T-shaped rod 7 is fixedly installed at the top of the connecting plate 6, and the connecting plate 6 and the filter screen 3 can be conveniently lifted by the T-shaped rod 7;

draw-in groove 8 has all been seted up on the left side and the right side of connecting plate 6, is provided with on the rectangle frame 5 and clamps the subassembly, is provided with clean subassembly in the rectangle inlet hood 2, utilizes the cassette subassembly, is convenient for dismantle fast filter screen 3 fixed with quick installation, utilizes clean subassembly, can carry out self-cleaning ash removal to filter screen 3 surface, avoids the dust gathering at filter screen 3 surface more and causes the filtration pore blocking phenomenon on the filter screen 3 to take place.

In this embodiment, the clamping assembly includes two clamping rods 9, two pulling plates 10 and two springs 11, sliding holes have been all opened on the left inner wall and the right inner wall of the rectangular frame 5, two clamping rods 9 are respectively slidably mounted in the corresponding sliding holes, both ends of the clamping rods 9 all extend out of the sliding holes, one ends of the two clamping rods 9 close to each other are respectively slidably mounted in the corresponding clamping grooves 8, two pulling plates 10 are respectively fixedly mounted at one ends of the two clamping rods 9 far away from each other, one ends of the two springs 11 close to each other are respectively fixedly connected with the left outer wall and the right outer wall of the rectangular frame 5, one ends of the two springs 11 far away from each other are respectively fixedly connected with the corresponding pulling plates 10, the two springs 11 are respectively sleeved on the corresponding clamping rods 9, the two clamping rods 9 are respectively matched with the clamping grooves 8 in a clamping manner, the positions of the connecting plate 6 and the filter screen 3 can be fixed, the elastic force action of the two springs 11 is utilized, and the corresponding clamping rods 9 can be controlled to automatically reset.

In this embodiment, two constant head tanks have been seted up to the bottom of connecting plate 6, filter screen 3 is located between two constant head tanks, the top fixed mounting of rectangle air inlet cover 2 has two locating levers 12, the top of two locating levers 12 is slidable mounting respectively in corresponding constant head tank, utilize two locating levers 12 respectively with the grafting cooperation of corresponding constant head tank, can carry out preliminary location to the mounted position of filter screen 3, avoid installing the mounted position dress of filter screen 3 partially, and then the convenience carries out subsequent installation fixed operation to filter screen 3.

In this embodiment, fixed mounting has the bottom sealing strip on the inside wall of slot 4, and fixed mounting has the top sealing strip on the inner wall of through-hole, and bottom sealing strip and top sealing strip all with 3 sliding contact of filter screen, utilize the bottom sealing strip, can seal the clearance between filter screen 3 and the slot 4, utilize the top sealing strip, can seal the clearance between filter screen 3 and the through-hole.

In this embodiment, the cleaning assembly includes a motor 13, a reciprocating screw 14, a shaft seat 15, a movable seat 16, a brush plate 17, bristles 18 and a vertical guide rod 19, the motor 13 is fixedly installed on the top inner wall of the rectangular air intake cover 2 and located on the right side of the filter screen 3, the top end of the reciprocating screw 14 is fixedly connected with the output shaft of the motor 13, the shaft seat 15 is fixedly installed on the bottom inner wall of the rectangular air intake cover 2, the bottom end of the reciprocating screw 14 is rotatably connected with the shaft seat 15, the movable seat 16 is sleeved on the reciprocating screw 14 through a thread, the brush plate 17 is fixedly installed on the left side of the movable seat 16, the bristles 18 are fixedly installed on the left side wall of the brush plate 17, the bristles 18 are in contact with the filter screen 3, the vertical guide rod 19 is fixedly installed in the rectangular air intake cover 2 and located on the right side of the reciprocating screw 14, the movable seat 16 is slidably sleeved on the vertical guide rod 19, the motor 13 can control the rotation of the reciprocating screw 14, the movable seat 16 is in threaded connection with the reciprocating screw 14, the vertical guide rod 19 can be used for guiding the movement direction of the movable seat 16, and then the bristles 18 can be used for cleaning the dust adhered to the filter screen 3.

In this embodiment, the bristles 18 are nylon bristles, which have good wear resistance, corrosion resistance and heat resistance, so that the bristles 18 have a long service life.

In this embodiment, two limiting rods are fixedly mounted on the vertical guide rod 19, the movable seat 16 is located between the two limiting rods, and the two limiting rods are utilized to limit the movement stroke of the movable seat 16.

In this embodiment, the bottom of the rectangular air intake cover 2 is fixedly provided with the dust collecting box 20, the top of the dust collecting box 20 is of an open structure, the bottom inner wall of the rectangular air intake cover 2 is fixedly provided with the dust guide plate 21 which is obliquely arranged, the dust guide plate 21 is positioned on the right side of the filter screen 3, the top of the dust guide plate 21 is in sliding contact with the right side of the filter screen 3, the bottom inner wall of the rectangular air intake cover 2 is provided with the dust falling hole 22, the dust falling hole 22 is positioned between the dust guide plate 21 and the shaft seat 15, the dust falling hole 22 is communicated with the inside of the dust collecting box 20, the right inner wall of the dust collecting box 20 is provided with the rectangular cleaning hole 23, the rectangular cleaning hole 23 is internally and movably provided with the rectangular rubber plug 24, the dust guide plate 21 is utilized to guide the cleaned dust into the dust falling hole 22, and further the cleaned dust can fall into the dust collecting box 20 for collection and storage, and the dust in the dust collecting box 20 can be conveniently cleaned regularly cleaned out through the rectangular cleaning hole 23 and the rectangular rubber plug 24.

In this embodiment, rectangle rubber buffer 24 adopts the rubber materials that elasticity is good, the wearability is good to make, and then utilizes rectangle rubber buffer 24 can carry out effectual shutoff to rectangle clearance hole 23 to the convenience is extracted rectangle rubber buffer 24 outside rectangle clearance hole 23.

In this embodiment, the motor 13 is electrically connected to the internal power line of the refrigeration and air-conditioning apparatus main body 1, when the refrigeration and air-conditioning apparatus main body 1 operates, the motor 13 is also powered on to operate, and when the refrigeration and air-conditioning apparatus main body 1 stops operating, the motor 13 is powered off to stop operating.

When in use, when the refrigeration and air-conditioning equipment main body 1 is powered on, external air can be sucked into the rectangular air inlet cover 2, dust impurities carried in the external air are intercepted and filtered by the filter screen 3, the filtered air enters the refrigeration and air-conditioning equipment main body 1 again to be refrigerated, the reciprocating screw 14 is driven by the motor 13 to rotate, the movable seat 16 can be controlled to drive the brush board 17 and the brush hairs 18 to reciprocate in the vertical direction, the movable seat 16 slides up and down on the vertical guide rods 19 in a reciprocating manner, the dust impurities adhered to the filter screen 3 can be cleaned by the up-and-down reciprocating movement of the brush hairs 18, the surface of the filter screen 3 can be automatically cleaned and cleaned, the phenomenon that the filter holes on the filter screen 3 are blocked due to more and more dust gathered on the surface of the filter screen 3 can be avoided, and the air permeability of the filter screen 3 is improved, the cleaned dust and impurities pass through the dust falling hole 22 and fall into the dust collection box 20 for collection and storage under the guide of the dust guide plate 21, the dust and impurities in the dust collection box 20 can be cleaned out by regularly pulling out the rectangular rubber plug 24, when the filter screen 3 needs to be disassembled, the two pull plates 10 are pulled to move in the direction away from each other, the two pull plates 10 drive the corresponding clamping rods 9 to horizontally slide, the two springs 11 are pulled to deform and generate elasticity, when the two clamping rods 9 are respectively pulled out of the corresponding clamping grooves 8, the fixing of the connecting plate 6 is released, the T-shaped rod 7 is pulled upwards, the filter screen 3 can be pulled out of the rectangular air inlet cover 2, the filter screen 3 can be rapidly disassembled by manual operation, the operation is convenient, when the filter screen 3 needs to be reinstalled in the rectangular air inlet cover 2, the two pull plates 10 are pulled to move in the direction away from each other, two clamping rods 9 are pulled to proper spacing positions, at the moment, two springs 11 are all pulled to be stretched and deformed to generate elastic force, then the position of two pulling plates 10 is kept fixed, the filter screen 3 sequentially penetrates through the rectangular frame 5 and the through hole, the bottom end of the filter screen 3 is inserted into the slot 4, the top ends of two positioning rods 12 are respectively inserted into two positioning grooves in the bottom of the connecting plate 6, then the two pulling plates 10 are loosened, under the elastic force action of the two springs 11, the two clamping rods 9 can be controlled to be respectively and tightly inserted into the corresponding clamping grooves 8, the positions of the connecting plate 6 and the filter screen 3 can be fixed by utilizing the clamping fit of the two clamping rods 9 and the corresponding clamping grooves 8, and then the filter screen 3 can be quickly installed and fixed through free-hand operation.

To sum up, this prevent refrigeration air conditioning equipment who blocks up can carry out self-cleaning ash removal to filter screen 3 surface, avoids the filtration pore on the filter screen 3 to block up, has improved filter screen 3's gas permeability, guarantees refrigeration air conditioning equipment main part 1 steady operation, can dismantle fast and install fast fixedly in addition to filter screen 3, the simple operation to only need bare-handed operation just can realize the quick assembly disassembly operation to filter screen 3.

Claims

1. The utility model provides a prevent refrigeration air conditioning equipment of jam, includes refrigeration air conditioning equipment main part (1), its characterized in that: a rectangular air inlet cover (2) is fixedly installed at the air inlet end of the refrigeration air-conditioning equipment main body (1), a filter screen (3) is arranged in the rectangular air inlet cover (2), an insertion groove (4) is formed in the inner wall of the bottom of the rectangular air inlet cover (2), the bottom of the filter screen (3) is slidably installed in the insertion groove (4), a rectangular frame (5) is fixedly installed at the top of the rectangular air inlet cover (2), a through hole is formed in the inner wall of the top of the rectangular air inlet cover (2), the through hole is communicated with the inside of the rectangular frame (5), the top of the filter screen (3) penetrates through the through hole and is fixedly provided with a connecting plate (6), and a T-shaped rod (7) is fixedly installed at the top of the connecting plate (6);

clamping grooves (8) are formed in the left side and the right side of the connecting plate (6), clamping components are arranged on the rectangular frame (5), and cleaning components are arranged in the rectangular air inlet cover (2).

2. An anti-clogging refrigerated air conditioning unit as claimed in claim 1 wherein: the clamping assembly comprises two clamping rods (9), two pull plates (10) and two springs (11), sliding holes are formed in the inner wall of the left side and the inner wall of the right side of the rectangular frame (5), the two clamping rods (9) are respectively installed in the corresponding sliding holes in a sliding mode, the two ends of each clamping rod (9) extend to the outside of each sliding hole, one ends, close to each other, of the two clamping rods (9) are respectively installed in the corresponding clamping grooves (8) in a sliding mode, the two pull plates (10) are respectively installed at two ends, far away from each clamping rod (9), of the two springs (11) are respectively fixedly connected with the outer wall of the left side and the outer wall of the rectangular frame (5), one ends, far away from each spring (11), of the two springs (11) are respectively fixedly connected with the corresponding pull plates (10), and the two springs (11) are respectively sleeved on the corresponding clamping rods (9).

3. An anti-clogging refrigerated air conditioning unit as claimed in claim 1 wherein: two positioning grooves are formed in the bottom of the connecting plate (6), the filter screen (3) is located between the two positioning grooves, two positioning rods (12) are fixedly mounted at the top of the rectangular air inlet cover (2), and the top ends of the two positioning rods (12) are respectively slidably mounted in the corresponding positioning grooves.

4. An anti-clogging refrigerated air conditioning unit as claimed in claim 1 wherein: the inner side wall of the slot (4) is fixedly provided with a lower sealing strip, the inner wall of the through hole is fixedly provided with an upper sealing strip, and the lower sealing strip is in sliding contact with the upper sealing strip and the filter screen (3).

5. An anti-clogging refrigerated air conditioning unit as claimed in claim 1 wherein: the cleaning assembly comprises a motor (13), a reciprocating lead screw (14), a shaft seat (15), a movable seat (16), a brush plate (17), bristles (18) and a vertical guide rod (19), wherein the motor (13) is fixedly installed on the inner wall of the top of the rectangular air inlet cover (2) and positioned on the right side of the filter screen (3), the top end of the reciprocating lead screw (14) is fixedly connected with the output shaft end of the motor (13), the shaft seat (15) is fixedly installed on the inner wall of the bottom of the rectangular air inlet cover (2), the bottom end of the reciprocating lead screw (14) is rotatably connected with the shaft seat (15), the movable seat (16) is in threaded sleeve connection with the reciprocating lead screw (14), the brush plate (17) is fixedly installed on the left side of the movable seat (16), the bristles (18) are fixedly installed on the left side wall of the brush plate (17), the bristles (18) are in contact with the filter screen (3), the vertical guide rod (19) is fixedly installed in the rectangular air inlet cover (2) and positioned on the right side of the reciprocating lead screw (14), and the movable seat (16) is in a sliding sleeve manner.

6. An anti-clogging refrigerated air conditioning unit as claimed in claim 5 wherein: two limiting rods are fixedly mounted on the vertical guide rod (19), and the movable seat (16) is located between the two limiting rods.

7. An anti-clogging refrigerated air conditioning unit as claimed in claim 5 wherein: the bottom fixed mounting of rectangle air intake cover (2) has dust collection box (20), the top of dust collection box (20) is the opening structure, fixed mounting has dust deflector (21) that the slope set up on the bottom inner wall of rectangle air intake cover (2), dust deflector (21) are located the right side of filter screen (3), the top of dust deflector (21) with the right side sliding contact of filter screen (3), dust falling hole (22) have been seted up on the bottom inner wall of rectangle air intake cover (2), dust falling hole (22) are located dust deflector (21) with between axle bed (15), dust falling hole (22) with dust collection box (20) inside is linked together, rectangle clearance hole (23) have been seted up on the right side inner wall of dust collection box (20), movable mounting has rectangle rubber buffer (24) in rectangle clearance hole (23).