CN111102219B

CN111102219B - Down-detachable fan filtering system and efficient filter replacing method

Info

Publication number: CN111102219B
Application number: CN201911285665.0A
Authority: CN
Inventors: 刘磊
Original assignee: Shenzhen Meiri Purification Technology Co ltd
Current assignee: Shenzhen Meiri Purification Technology Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-10
Anticipated expiration: 2039-12-13
Also published as: CN111102219A

Abstract

The invention relates to a downward-detachable fan filtering system which comprises a fan box body, a filtering assembly and a flow dispersing plate, wherein the flow dispersing plate is arranged at the bottom of the fan box body and detachably connected with the fan box body, the fan box body is fixedly arranged at the bottom of a keel, the fan box body comprises a main box body and a frame body, the main box body is arranged on the keel, the frame body is fixed at the bottom of the main box body, the filtering assembly is arranged in the frame body, the top of the filtering assembly is abutted against the main box body, the flow dispersing plate is positioned below the filtering assembly, and a first limiting assembly enabling the filtering assembly to be abutted against the main box body is arranged on the main box body. The filter assembly can be replaced by an operator directly below the keel without climbing into the space between the keel and the roof for replacement operation, so that the action of the operator is prevented from being limited by the narrow space between the keel and the roof.

Description

Down-detachable fan filtering system and efficient filter replacing method

Technical Field

The invention relates to the technical field of air purification, in particular to a lower detachable fan filtering system and a filtering component replacing method.

Background

At present, the precision machinery industry, the electronic industry, the high-purity chemical industry or the photomagnetic product industry and the like all put high requirements on the production and manufacturing environment, and dust-free workshops for production gradually draw attention. A clean room is a closed space in which suspended particles that hinder production in air are removed and environmental parameters such as temperature, humidity, and air pressure are controlled.

Current dustless workshop top is often equipped with fan filter unit, fan filter unit includes fan box and filtering component, unsettled fossil fragments that are provided with in the current dustless workshop, the operator need climb earlier in the space between fossil fragments and the roof when installing fan filter unit, the operator adorns filtering component at the fossil fragments top earlier, filtering component pushes down fossil fragments, the operator installs the fan box on filtering component afterwards, filtering component is pushed down to the fan box, the operator installs the board that looses at the fossil fragments bottom afterwards again, and then the installation of fan filter unit has been accomplished.

Current fan filter unit need regularly change filter assembly, and the operator need climb once more to the space between fossil fragments and the roof when changing filter assembly, and the operator need lift up the fan box body earlier, make filter assembly expose, and the operator will originally push down the filter assembly of fossil fragments and take off the back and install new filter assembly on fossil fragments afterwards, and the operator puts down the fan box body again in order to push down the filter assembly of new installation afterwards to accomplish filter assembly's replacement.

The above prior art solutions have the following drawbacks: in order to ensure that enough production and operation space exist in the existing dust-free workshop, the keel is higher in setting height, the distance between the keel and the roof is smaller, an operator needs to regularly climb into the space between the keel and the roof for replacing the filter assembly for realizing the regular replacement of the filter assembly, and the narrow space limits the action of the operator, so that the defect that the filter assembly is inconvenient to replace exists.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the downward-detachable fan filtering system, so that an operator does not need to operate a space between a keel and a roof when replacing a filtering component, and the filtering component is convenient to replace.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a lower disconnect-type fan filtration system, includes fan box, filtering component and flow scattering plate, the flow scattering plate sets up in the bottom of fan box and can dismantle with the fan box and be connected, the fan box includes main tank body and framework, the main tank body is used for fixing on fossil fragments, the framework is fixed in the main tank bottom, filtering component sets up in the space that the framework encloses, the flow scattering plate is located the filtering component below, is located the main tank body below is provided with the first spacing subassembly that is used for spacing filtering component, makes filtering component and main tank body keep adjustable butt.

By adopting the technical scheme, the main box body is arranged on the keel, when the fan filtering system operates, air is blown to the filtering component from the main box body, the air filtered by the filtering component is blown to the indoor through the flow dispersing plate, a dust-free environment is formed, when the filtering component is replaced, an operator can remove the position limitation of the first position limiting component on the filtering component from the lower part of the main box body after removing the installation of the flow dispersing plate, then takes out the filtering component from the frame body and puts a new filtering component into the frame body through the first position limiting component, and then the operator installs the flow dispersing plate, so that the replacement of the filtering component is completed;

the operator can directly change filter assembly below fossil fragments and need not climb to and change the operation in the space between fossil fragments and the roof, prevents narrow and small space restriction operator's between fossil fragments and the roof action, and is more convenient to filter assembly's change.

The present invention in a preferred example may be further configured to: the first limiting assembly comprises a first connecting rod, a first sleeve and a bearing block, the first connecting rod is fixed to the bottom of the main box body, the first sleeve is rotatably connected to the first connecting rod, the bearing block is fixed to the first sleeve, and the bearing block is abutted to the bottom surface of the filtering assembly.

Through adopting above-mentioned technical scheme, the operator rotates first sleeve after with the filter assembly butt on the main tank body bottom surface, drives and accepts the piece and rotates, thereby accept the piece and rotate to make and accept the piece and block filter assembly from the bottom with filter assembly bottom surface butt to the completion is to filter assembly's installation, convenient operation.

The present invention in a preferred example may be further configured to: the main tank body is characterized in that a first air port is formed in the bottom of the main tank body, a first bulge arranged around the first air port is fixed at the bottom of the main tank body, the filtering assembly comprises a high-efficiency filter and a buffer pad frame, the inner wall of the buffer pad frame is abutted to the side wall of the first bulge, and the buffer pad frame is abutted to the bottom surface of the main tank body.

Through adopting above-mentioned technical scheme, the phenomenon of leaking out has been avoided in the laminating of cushion frame and first arch and main tank bottom surface, prevents that the wind that first wind gap blew out from blowing into the board below that looses from the gap between cushion frame and first arch, the main tank body promptly without high efficiency filter's filtration, prevents that unfiltered air from blowing into the normal production and the manufacturing of product in the image dust-free workshop in the dust-free workshop.

The present invention in a preferred example may be further configured to: the improved filter box is characterized in that a second sleeve is arranged on the main box body, a second connecting rod is connected to the second sleeve in a sliding mode along the height direction of the frame body, the second connecting rod is detachably connected with a flow dispersing plate, a bracket used for receiving a high-efficiency filter and a cushion frame from the bottom is mounted on the side wall of the second connecting rod, the inner side face of the bracket is abutted to the side portion of the high-efficiency filter and the side portion of the cushion frame, a stop block is arranged on the flow dispersing plate, the end portion of the high-efficiency filter and the end portion of the cushion frame are abutted to the stop block, the cushion frame located at the top of the high-efficiency filter is aligned to a first protrusion when the high-efficiency filter is abutted to the inner side face of the bracket and the stop block, a linkage limiting component is arranged on the first.

By adopting the technical scheme, an operator needs to disassemble the flow dispersing plate blocked below the high-efficiency filter when replacing the high-efficiency filter, the second connecting rod and the second sleeve limit the disassembling and assembling track of the flow dispersing plate, the flow dispersing plate is convenient to be re-installed on an initial position after being disassembled, the operator places the high-efficiency filter on the bracket and enables the side part of the bracket to be abutted against the high-efficiency filter, then the operator pushes the high-efficiency filter to enable the end part of the high-efficiency filter to be abutted against the stop block, so that the buffer cushion frame on the high-efficiency filter is aligned with the first bulge before being abutted against the main box body, the inner side wall of the buffer cushion frame is ensured to be abutted against the side wall of the first bulge when the high-efficiency filter is installed, the air blown from the first air port is ensured to be blown into a dust-free workshop through the filtration of the high-, convenient operation, and under the effect of the spacing subassembly of linkage, the slip of second connecting rod receives the restriction when the piece that holds from the bottom holds the high efficiency filter to realized scattered synchronous installation of flowing board and high efficiency filter, the operator need not carry out installation operation respectively to high efficiency filter and scattered flowing board, convenient operation.

An operator rotates the first sleeve when replacing the high-efficiency filter, removes the connection of the high-efficiency filter and the buffer cushion frame by the connection block, removes the clamping connection of the second clamping block and the clamping groove, removes the limitation of the sliding of the second connecting rod, and then moves the flow dispersing plate downwards to drive the second connecting rod, the bracket and the high-efficiency filter to move downwards synchronously;

the flow dispersing plate is located below the high-efficiency filter and moves synchronously with the high-efficiency filter in the moving-up and falling processes of the high-efficiency filter, an operator can lift the flow dispersing plate from the bottom and move the flow dispersing plate upwards when moving the high-efficiency filter upwards to drive the high-efficiency filter to move upwards, the high-efficiency filter is prevented from reducing the filtering effect of the high-efficiency filter due to direct touch of operators on the bottom surface when the operator directly lifts the high-efficiency filter upwards, the situation that the high-efficiency filter is difficult to hold due to the thin buffer frame when the operator lifts the buffer frame upwards by two hands is also avoided, the operator can conveniently move the high-efficiency filter upwards, and the discomfort of the operator due to the fact that a large amount of dust falls onto the body of the operator due to the fact that the operator shakes when the operator holds the.

The present invention in a preferred example may be further configured to: the joint groove has been seted up to second connecting rod lateral part, the spacing subassembly of linkage includes joint piece and linkage subassembly, joint piece embedding joint groove, the linkage subassembly drives joint piece embedding joint groove when first sleeve rotates.

Through adopting above-mentioned technical scheme, when the operator lifts the board and with the board that looses and move up to cushion frame and the main tank butt, the operator rotates first sleeve and drives the bearing block and rotate, joint piece removal under the drive of linkage subassembly simultaneously, joint piece embedding joint inslot when waiting to bear the piece and accept high efficiency filter from the bottom, thereby realized the installation to the board that looses when realizing the high efficiency filter installation, the operator need not carry out the installation operation respectively to high efficiency filter and board that looses, convenient operation.

The present invention in a preferred example may be further configured to: the linkage assembly comprises a first connecting rod and a second connecting rod, the joint block is connected with the frame body in a sliding mode, the first connecting rod is fixed on the side wall of the first sleeve, the second connecting rod is hinged to the first connecting rod, and the joint block is hinged to the second connecting rod.

Through adopting above-mentioned technical scheme, when the operator rotated first sleeve, first connecting rod rotated and promoted the second connecting rod, and the second promotes the joint piece and slides, and joint piece embedding joint inslot when waiting to accept the piece and hold high efficiency filter to realized the installation to the board that looses when realizing the high efficiency filter installation, the operator need not carry out respectively installation operation, convenient operation to high efficiency filter and the board that looses.

The present invention in a preferred example may be further configured to: the linkage assembly comprises a first gear and a first rack, the first gear is fixed on the first sleeve, the first rack is connected with the frame body in a sliding mode, and the clamping block is fixed on the first rack.

Through adopting above-mentioned technical scheme, the operator rotates first sleeve and drives first gear revolve, drives the removal of first rack and joint piece, and joint piece embedding joint inslot when waiting to accept the piece and hold high efficiency filter to realized the installation to the board that looses when realizing the high efficiency filter installation, the operator need not carry out respective installation operation, convenient operation to high efficiency filter and the board that looses.

The present invention in a preferred example may be further configured to: the linkage limiting assembly comprises a second gear and a gear sleeve, the gear sleeve is sleeved on the second connecting rod, the gear sleeve is in running fit with the second connecting rod, one end of the gear sleeve is in threaded connection with the second sleeve, the other end of the gear sleeve is in threaded connection with the second connecting rod, the second gear is fixed on the first sleeve, the height of the second gear is smaller than that of the gear sleeve, and the second gear is meshed with the gear sleeve.

By adopting the technical scheme, the operator rotates the first sleeve and drives the second gear to rotate, and then drives the gear sleeve to rotate, the gear sleeve rotates, the gear sleeve gradually moves towards the direction close to the diffuser plate and is in threaded connection with the second connecting rod, when the supporting block rotates to support the high-efficiency filter from the bottom, the gear sleeve is in threaded connection with the second sleeve and the second connecting rod, the gear sleeve, the second sleeve and the second connecting rod realize fixation through the self-locking function of threaded connection, the downward movement of the second connecting rod is limited, the installation of the diffuser plate is realized while the installation of the high-efficiency filter is realized, the operator does not need to respectively carry out respective installation operation on the high-efficiency filter and the diffuser plate, and the operation is convenient.

The present invention in a preferred example may be further configured to: and a wind pressure detection module for detecting the wind intensity of the blown filter assembly is arranged on the main box body.

Through adopting above-mentioned technical scheme, the wind pressure that the air that the wind pressure detection module detectable blew off from high efficiency filter produced, the operator can judge high efficiency filter's jam degree according to the signal that the wind pressure detection module measured, and the wind pressure that the wind pressure detection module measured is less to high efficiency filter blows off wind-force is less, and the operator can know that high efficiency filter blocks up the degree seriously and in time changes high efficiency filter.

The second purpose of the present invention is to provide a method for replacing a high efficiency filter, wherein an operator can support the diffuser plate to operate the synchronous upward and downward movement of the diffuser plate and the high efficiency filter, and the method has the advantage of convenient replacement of the high efficiency filter.

the present invention in a preferred example may be further configured to: a high-efficiency filter replacing method based on the downward-dismounting type fan filtering system comprises the following steps:

s1, rotating the first sleeve to drive the bearing block to rotate, and removing the sliding limitation of the second connecting rod under the drive of the linkage limiting component;

s2, lifting the flow dispersing plate and moving the flow dispersing plate downwards to drive the second connecting rod, the bracket and the used high-efficiency filter to move downwards;

s3, removing the used high-efficiency filter from the bracket, placing the new high-efficiency filter fixed with the cushion frame on the bracket, and enabling the high-efficiency filter to be abutted against the stop block;

s4, lifting the flow dispersing plate and moving the flow dispersing plate upwards to drive the second connecting rod, the bracket and the new high-efficiency filter to move upwards, wherein a buffer cushion frame on the high-efficiency filter is abutted against the side wall of the first bulge and the main box body;

s5, the first sleeve is rotated reversely to drive the bearing block to rotate reversely, the bearing block bears the newly replaced high-efficiency filter from the bottom, the second connecting rod is limited to slide under the drive of the linkage limiting assembly, and the flow dispersing plate is fixed on the fan box body.

By adopting the technical scheme, an operator can support the flow dispersing plate to operate the synchronous upward movement and downward movement of the flow dispersing plate and the high-efficiency filter, so that the damage to a part of a filtering structure on the high-efficiency filter when the operator directly lifts the new high-efficiency filter upward is avoided, the reduction of the filtering effect of the high-efficiency filter is prevented, the inconvenience in hand holding caused by the thin buffer cushion frame when the operator lifts the buffer cushion frame upward to move the high-efficiency filter is prevented, and the installation of the high-efficiency filter is facilitated;

when the high efficiency filter who will use shifts out the framework, the board that looses keeps blocking high efficiency filter from the bottom, prevents that the high efficiency filter who has used from leading to the dust that adsorbs on high efficiency filter to scatter in the dustless workshop or the operator is on one's body because the shake at next in-process, avoids operator's discomfort, avoids need to start fan filtration system and consume the waste of a large amount of time in order to carry out air purification in the dustless workshop to high efficiency filter change completion back, avoids production in the dustless workshop, the waste of processing activity duration.

In summary, the invention includes at least one of the following beneficial technical effects:

1. an operator can directly replace the filtering component below the keel without climbing into a space between the keel and the roof to replace the filtering component, so that the action of the operator is prevented from being limited by the narrow space between the keel and the roof, and the filtering component is more conveniently replaced;

2. an operator rotates the first sleeve after abutting the filter assembly on the bottom surface of the main box body to drive the bearing block to rotate, the bearing block rotates to abut against the bottom surface of the filter assembly, so that the bearing block blocks the filter assembly from the bottom, the installation of the filter assembly is completed, and the operation is convenient;

3. under the effect of the linkage limiting assembly, the sliding of the second connecting rod is limited when the bearing block bears the high-efficiency filter from the bottom, so that the synchronous installation of the flow dispersing plate and the high-efficiency filter is realized, and an operator does not need to respectively install and operate the high-efficiency filter and the flow dispersing plate, and the operation is convenient.

Drawings

FIG. 1 is a top schematic view of a first embodiment;

FIG. 2 is a bottom view of the first embodiment;

FIG. 3 is an exploded view of the first embodiment;

FIG. 4 is a schematic view of the internal structure of a casing of the fan according to an embodiment;

FIG. 5 is an enlarged view at A in FIG. 4;

FIG. 6 is a cross-sectional view of the first embodiment;

FIG. 7 is an exploded view of the diffuser plate and the blower housing in the second embodiment;

FIG. 8 is an enlarged view at B in FIG. 7;

FIG. 9 is a schematic structural diagram of a fan case, a filter assembly and a linkage limiting assembly according to a second embodiment;

FIG. 10 is a cross-sectional view of the first stop assembly, the linkage stop assembly, the second connecting rod and the second sleeve of the second embodiment;

FIG. 11 is an exploded view of the second embodiment of the diffuser plate and blower housing from another perspective;

FIG. 12 is a schematic structural view of the linkage limiting assembly, the first limiting assembly, the second connecting rod, the second sleeve and the bracket according to the second embodiment;

FIG. 13 is a schematic structural diagram of a case, a filter assembly and a linkage limiting assembly of a third fan according to an embodiment;

FIG. 14 is an enlarged view at C of FIG. 13;

FIG. 15 is a cross-sectional view of the first stop assembly, the linkage stop assembly, the second connecting rod and the second sleeve of the third embodiment;

FIG. 16 is a schematic structural diagram of a fan case, a filter assembly and a linkage limiting assembly in the fourth embodiment;

FIG. 17 is an enlarged view at D of FIG. 16;

FIG. 18 is a cross-sectional view of the first stop assembly, the linkage stop assembly, the second connecting rod and the second sleeve of the fourth embodiment;

FIG. 19 is a schematic structural view of a gear sleeve in the fourth embodiment.

In the figure, 1, a fan box body; 11. a main box body; 111. lifting lugs; 112. a first tuyere; 113. a first protrusion; 12. a frame body; 2. a filter assembly; 21. a high efficiency filter; 22. a cushion frame; 3. a flow dispersing plate; 31. a clamping frame; 32. a stopper; 4. a first limit component; 41. a first connecting rod; 411. a first main bar; 412. a first stopper; 42. a first sleeve; 421. a hexagonal groove; 422. a first limit protrusion; 43. a bearing block; 5. a second sleeve; 51. a second limit bulge; 52. a main cylinder part; 53. an extension portion; 6. a second connecting rod; 61. a second main bar; 611. a clamping groove; 62. a second limiting block; 63. connecting blocks; 631. connecting grooves; 7. a bracket; 8. a linkage limiting component; 81. a clamping block; 811. a connecting projection; 82. a first gear; 83. a first rack; 84. a first link; 85. a second link; 86. a second gear; 87. a gear sleeve; 871. a first groove; 872. a first opening; 873. a second opening.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1 and 2, for the invention discloses a downward-detachable fan filtering system, which comprises a fan box body 1, a filtering component 2 and a flow dispersing plate 3 arranged on the fan box body 1, wherein the fan box body 1 comprises a main box body 11 and a frame body 12, the main box body 11 is hollow, a fan set for blowing indoor air to the filtering component 2 for filtering is arranged in the main box body 11, the main box body 11 is horizontally arranged, a fixing part for fixedly arranging the main box body 11 at the bottom of a keel is fixed at the top of the main box body 11, the fixing part comprises but is not limited to a lifting lug 111, an operator can fixedly arrange the main box body 11 and the keel after penetrating the lifting lug 111 and fixing the lifting lug on the keel, the frame body 12 is vertically fixed at the bottom of the main box body 11, the frame body 12 surrounds the bottom surface of the main box body 11, a flanging is arranged at the bottom end of the frame body 12, the filtering component 2 is arranged, the diffuser 3 is fixed to a flange at the bottom of the frame 12 by screws, and a wind pressure gauge (not shown) for detecting the wind force of the air blown out of the filter assembly 2 is installed on the main case 11.

Referring to fig. 3 and 4, the filter assembly 2 includes high efficiency filter 21 and cushion frame 22, cushion frame 22 is at high efficiency filter 21 top, each bonding of bottom is fixed with one, cushion frame 22 is the rectangle framework, the horizontal thickness on the long avris of cushion frame 22 and the minor flank side equals, cushion frame 22 lateral wall is flat mutually with high efficiency filter 21 lateral wall, main box 11 bottom surface is seted up the first wind gap 112 that the air feed blew in high efficiency filter 21, main box 11 bottom surface is around the vertical first arch 113 that is fixed with of first wind gap 112, first arch 113 lateral wall and the inside wall butt of cushion frame 22 that is located high efficiency filter 21 top, cushion frame 22 top surface and the main box 11 bottom surface butt that is located high efficiency filter 21 top.

Referring to fig. 5 and 6, the main box 11 is provided with a first limiting assembly 4 for keeping the filter assembly 2 in contact with the main box 11, the first limiting assembly 4 includes a first connecting rod 41, a first sleeve 42 and a receiving block 43, the first connecting rod 41 is vertically fixed on the bottom surface of the main box 11, the first connecting rod 41 is a round rod, the first sleeve 42 is sleeved on the bottom of the first connecting rod 41, the first connecting rod 41 includes a first main rod 411 and a first limiting block 412, the first main rod 411 is vertically fixed on the main box 11 and penetrates through the first sleeve 42, the first limiting block 412 is fixed at the bottom end of the first main rod 411, the top surface of the first limiting block 412 is in contact with the bottom surface of the first sleeve 42, the first sleeve 42 is rotatably connected with the first main rod 411, the first connecting rod 41 and the first sleeve 42 are arranged on both sides of the high efficiency filter 21, the first connecting rod 41 and the first sleeve 42 are horizontally arranged at intervals along the length direction of the high efficiency filter 21, the receiving block 43 is fixed on the side wall of the first sleeve 42, the top surface of the receiving block 43 is abutted with the cushion frame 22 positioned on the bottom surface of the high-efficiency filter 21, the receiving block 43 receives the high-efficiency filter 21 and the cushion frame 22 from the bottom, and the receiving block 43 is moved away from the bottoms of the high-efficiency filter 21 and the cushion frame 22 after the receiving block 43 rotates 90 degrees. The receiving block 43 is thus capable of being rotated, and a specific rotated angle may be, but is not limited to, 90 °, and the 90 ° rotation of the receiving block 43 receiving the high efficiency filter 21 and the cushion frame 22 allows the receiving block 43 to be removed from the bottom of the high efficiency filter 21 and the cushion frame 22 when the high efficiency filter 21 is installed or replaced.

The implementation principle of the embodiment is as follows: after an operator fixedly installs the main box body 11 on the keel through a hanging rod penetrating through the lifting lug 111, the operator lifts the buffer cushion frame 22 and manually moves the high-efficiency filter 21 and the buffer cushion frame 22 upwards, the high-efficiency filter 21 enters a space enclosed by the frame body 12, the inner side wall of the buffer cushion frame 22 at the top of the high-efficiency filter 21 is abutted to the outer wall of the first bulge 113, the top of the buffer cushion frame 22 at the top of the high-efficiency filter 21 is abutted to the main box body 11, the operator lifts and fixes the high-efficiency filter 21 and rotates the first sleeves 42 positioned at two sides of the high-efficiency filter 21 one by one, after the first sleeves 42 rotate for 90 degrees, the bearing block 43 rotates to the top surface to be abutted to the buffer cushion frame 22 at the bottom of the high-efficiency filter 21, the bearing block 43 bears the high-efficiency filter 21 from the bottom, the operator blocks the bottom of the diffuser plate 3 from the bottom of the frame.

When the high-efficiency filter 21 needs to be replaced, an operator removes the connection between the frame body 12 and the flow dispersing plate 3 from the bottom of the frame body 12, then rotates the first sleeves 42 one by one in the reverse direction, manually lifts the cushion frame 22 at the bottom of the high-efficiency filter 21, moves the bearing block 43 away from the lower side of the high-efficiency filter 21, and then the operator can move the high-efficiency filter 21 down and install a new high-efficiency filter 21 in the frame body 12, so that the high-efficiency filter 21 can be replaced.

Example two:

referring to fig. 7 to 9, another downward-detachable fan filter system disclosed in the present invention is different from the first embodiment in that the first connecting rod 41 and the first sleeve 42 have different structures, and the second sleeve 5, the second connecting rod 6, the bracket 7 and the linkage limiting component 8 are added, the diffuser 3 is fixed to the second connecting rod 6 to be installed on the fan housing 1, so that an operator can install the high-efficiency filter 21 and the diffuser 3 synchronously, and the operator does not need to perform separate operations on the installation of the high-efficiency filter 21 and the diffuser 3, thereby improving the convenience of operation.

Referring to fig. 7 and 10, the first connecting rod 41 includes a first main rod 411 and a first stopper 412, the first main rod 411 is vertically fixed on the bottom surface of the main box body 11, the first main rod 411 is a round rod, the first stopper 412 is fixed at the bottom end of the first main rod 411, the first stopper 412 is a cylindrical block, the first sleeve 42 is sleeved on the first main rod 411 and the first stopper 412, a first stopper 422 is fixed at the top end of the inner side wall of the first sleeve 42, the bottom surface of the first stopper 422 abuts against the top surface of the first stopper 412, the first sleeve 42 is rotatably connected with the first stopper 412, the bottom end of the first sleeve 42 penetrates through the diffuser plate 3, the bottom surface of the first sleeve 42 is flush with the bottom surface of the diffuser plate 3, and a hexagonal groove 421 for embedding a hexagonal key is formed in the bottom surface of the first sleeve.

Referring to fig. 8 and 10, a second sleeve 5 is fixed at the bottom of the main box 11, and the specific fixing manner includes, but is not limited to, welding, the second sleeve 5 is vertically arranged, the second sleeve 5 is a circular sleeve with an open bottom end, the top of the second sleeve 5 penetrates into the main box 11, the bottom of the second sleeve 5 penetrates into a space enclosed by the frame 12, the second sleeve 5 is located on one side of the first main rod 411, and the second sleeve 5 and the first main rod 411 are arranged at intervals along the length direction of the high efficiency filter 21 (see fig. 9);

referring to fig. 10, a second connecting rod 6 is sleeved in the second sleeve 5, the second connecting rod 6 includes a second main rod 61, a second limit block 62 and a connecting block 63, the second main rod 61 is located in the second sleeve 5, the second limit block 62 is fixed at the top end of the second main rod 61, the second limit block 62 is vertically and slidably connected with the second sleeve 5, a second limit protrusion 51 is fixed at the bottom end of the inner wall of the second sleeve 5, the top surface of the second limit protrusion 51 is abutted against the bottom surface of the second limit block 62, the second main rod 61 is vertically and slidably matched with the second limit protrusion 51, and the difference between the distance from the top wall of the second sleeve 5 to the top surface of the second limit protrusion 51 and the thickness of the second limit block 62 is greater than the height of;

referring to fig. 8 and 11, the bottom end of the second main rod 61 penetrates through the second sleeve 5, the connecting block 63 is fixed at the bottom end of the second main rod 61, the clamping frame 31 is fixed on the top surface of the flow dispersing plate 3, the connecting grooves 631 into which the clamping frame 31 is inserted are formed in two sides of the connecting block 63, and the clamping frame 31 is inserted into the connecting grooves 631 along the length direction of the flow dispersing plate 3.

Referring to fig. 9 and 12, a bracket 7 for receiving the high efficiency filter 21 and the cushion frame 22 from the bottom is fixed on a part of the side wall of the second main rod 61 protruding out of the second sleeve 5, the bracket 7 is an L-shaped frame body, the bracket 7 abuts against the bottom surface of the cushion frame 22 located below the high efficiency filter 21, the inner side wall of the bracket 7 abuts against the side walls of the high efficiency filter 21 and the cushion frame 22, the distance between the inner side wall of the bracket 7 and the outer side wall of the first protrusion 113 (see fig. 5) in the horizontal direction is equal to the horizontal frame thickness of the cushion frame 22, and when the receiving block 43 receives the bracket 7 of the high efficiency filter 21 and the cushion frame 22 from the bottom;

referring to fig. 9 and 11, the baffle plate 3 is fixed with a stopper 32 for aligning the high-efficiency filter 21 and the cushion frame 22 with the first protrusion 113 (see fig. 5), the end of the high-efficiency filter 21 abuts against the stopper 32, the distance between the stopper 32 and the side of the high-efficiency filter 21 abutting against the side wall of the first protrusion 113 (see fig. 5) in the horizontal direction is equal to the horizontal frame thickness of the cushion frame 22, and the cushion frame 22 on the top of the high-efficiency filter 21 aligns with the first protrusion 113 when the high-efficiency filter 21 abuts against the inner side of the bracket 7 and the stopper 32.

Referring to fig. 9 and 12, a linkage limiting assembly 8 which can limit the sliding of the second connecting rod 6 and limit the sliding of the second connecting rod when the bearing block 43 rotates is arranged on the first sleeve 42, the linkage limiting assembly 8 comprises a clamping block 81 and a linkage assembly, a clamping groove 611 is formed in the side portion of the second connecting rod 6, the clamping block 81 is embedded into the clamping groove 611, the linkage assembly drives the clamping block 81 to be embedded into the clamping groove 611 when the first sleeve 42 rotates, the linkage assembly comprises a first rack 83 and a first gear 82, the first gear 82 is sleeved and fixed on the first sleeve 42, the first gear 82 is located below the bearing block 43, the first rack 83 is horizontally slidably connected with the frame body 12 along the length direction of the high-efficiency filter 21, the first rack 83 is engaged with the first gear 82, the clamping block 81 is fixed on one end of the rack, and the clamping block 81 is slidably connected with the frame body 12 along the length direction of the rack.

The implementation principle of the embodiment is as follows: after the main box body 11 is fixedly mounted on the keel by the hanger rod penetrating through the lifting lug 111, the second main rod 61 extends out of the bottom of the second sleeve 5 under the action of gravity, the second limiting block 62 abuts against the second limiting protrusion 51, the operator moves the diffusion plate 3 and makes the clamping frame 31 align with the connecting groove 631, and then the operator horizontally moves the diffusion plate 3 to make the clamping frame 31 embedded into the connecting groove 631, so that the second connecting rod 6 is connected with the diffusion plate 3.

An operator places the high-efficiency filter 21 fixed with the cushion frame 22 on the bracket 7, the bottom of the filtering frame cushion positioned at the bottom of the high-efficiency filter 21 is abutted against the bracket 7, the bracket 7 is abutted against two side surfaces of the high-efficiency filter 21, the operator pushes the high-efficiency filter 21 to enable the end surface of the high-efficiency filter 21 to be abutted against the stop 32, the high-efficiency filter 21 and the cushion frame 22 are aligned to the first bulge 113, the operator lifts the diffuser 3 and moves the diffuser 3 upwards, the high-efficiency filter 21, the bracket 7 and the second connecting rod 6 synchronously move upwards, the first bulge 113 is embedded into the space of the cushion frame 22 positioned at the top of the high-efficiency filter 21, the outer side wall of the first bulge 113 is abutted against the inner wall of the cushion frame 22 positioned at the top of the high-efficiency filter 21, the cushion frame 22 positioned at the top of the high-efficiency filter 21 is abutted against, an operator then clamps the hexagonal keys into the hexagonal grooves 421 one by one and rotates the first sleeve 42 by 90 degrees, the receiving block 43 and the first gear 82 rotate synchronously, the first rack 83 and the clamping block 81 slide synchronously, the clamping block 81 is embedded into the clamping groove 611 when the receiving block 43 abuts against the bottom surface of the cushion frame 22 at the bottom of the high-efficiency filter 21, the receiving block 43 receives the high-efficiency filter 21 from the bottom, and the clamping block 81 limits the downward movement of the second main rod 61 and the flow dispersing plate 3, so that the synchronous installation of the high-efficiency filter 21 and the flow dispersing plate 3 is realized.

When the high-efficiency filter 21 needs to be replaced, an operator clamps the hexagonal keys into the hexagonal grooves 421 one by one and rotates the first sleeve 42 in the reverse direction by 90 degrees, during the period, the operator keeps manually supporting the flow dispersing plate 3, the supporting block 43 rotates synchronously and reversely with the first gear 82, the first rack 83 and the clamping block 81 slide reversely, the supporting block 43 rotates away from the bottom of the high-efficiency filter 21 to remove the supporting of the high-efficiency filter 21 and the buffer cushion frame 22, the clamping block 81 completely moves out of the clamping groove 611, the operator can move the flow dispersing plate 3 downwards and synchronously move the used high-efficiency filter 21 downwards and set the new high-efficiency filter 21 on the bracket 7, and then the operator installs the new high-efficiency filter 21 again, so that the replacement of the high-efficiency filter 21 is realized.

Example three:

referring to fig. 13 and 14, another bottom-detachable blower filtering system disclosed in the present invention is different from the second embodiment in that the linkage assembly adopts a link rod structure to drive the sliding of the clamping block 81, and an operator can rotate the first sleeve 42 to normally and synchronously drive the movement of the bearing block 43 and the clamping block 81, and can avoid the situation that the teeth at the meshing position of the gear and the rack are worn after long-time use, so that the operator is difficult to smoothly drive the sliding of the clamping block 81 when rotating the first sleeve 42.

Referring to fig. 14 and 15, the assembly includes a first connecting rod 84 and a second connecting rod 85, the first connecting rod 84 and the second connecting rod 85 are horizontally arranged, one end of the first connecting rod 84 is fixed on the side wall of the first sleeve 42, one end of the second connecting rod 85 is hinged to the other end of the first connecting rod 84 through a rotating shaft, a connecting protrusion 811 is fixed on one side of the joint block 81, and the end of the second connecting rod 85 is hinged to the connecting protrusion 811 through a rotating shaft, so that the second connecting rod 6 is hinged to the joint block 81.

An operator places the high-efficiency filter 21 fixed with the cushion frame 22 on the bracket 7, the bottom of the filtering frame cushion positioned at the bottom of the high-efficiency filter 21 is abutted against the bracket 7, the bracket 7 is abutted against two side surfaces of the high-efficiency filter 21, the operator pushes the high-efficiency filter 21 to enable the end surface of the high-efficiency filter 21 to be abutted against the stop block 32, the high-efficiency filter 21 and the cushion frame 22 are aligned to the first bulge 113, the operator lifts the diffuser 3 and moves the diffuser 3 upwards, the high-efficiency filter 21, the bracket 7 and the second connecting rod 6 synchronously move upwards, the first bulge 113 is embedded into a space surrounded by the cushion frame 22 positioned at the top of the high-efficiency filter 21, the outer side wall of the first bulge 113 is abutted against the inner wall of the cushion frame 22 positioned at the top of the high-efficiency filter 21, the cushion frame 22 positioned at the top of the high-efficiency filter 21 is abutted against, an operator then clamps the hexagonal keys into the hexagonal grooves 421 one by one and rotates the first sleeve 42 by 90 degrees, the receiving block 43 and the first connecting rod 84 rotate synchronously to drive the second connecting rod 85 to turn over, the second connecting rod 85 pushes the clamping block 81 to slide, the clamping block 81 is embedded into the clamping groove 611 when the receiving block 43 abuts against the bottom surface of the cushion frame 22 at the bottom of the high-efficiency filter 21, the receiving block 43 receives the high-efficiency filter 21 from the bottom, and the clamping block 81 limits the downward movement of the second main rod 61 and the flow dispersing plate 3, so that the high-efficiency filter 21 and the flow dispersing plate 3 are synchronously installed.

When the high-efficiency filter 21 needs to be replaced, an operator clamps the hexagonal keys into the hexagonal grooves 421 one by one and rotates the first sleeve 42 in the reverse direction by 90 degrees, during the period, the operator keeps manually supporting the flow dispersing plate 3, the supporting block 43 rotates in the reverse direction synchronously with the first connecting rod 84, the second connecting rod 85 rotates in the reverse direction to drive the clamping block 81 to slide in the reverse direction, the supporting block 43 rotates away from the bottom of the high-efficiency filter 21 to remove the supporting of the high-efficiency filter 21 and the buffer cushion frame 22, the clamping block 81 completely moves out of the clamping groove 611, the operator can move the flow dispersing plate 3 downwards and synchronously move the used high-efficiency filter 21 downwards and set the new high-efficiency filter 21 on the bracket 7, and then the operator installs the new high-efficiency filter 21 again, so that the replacement of.

Example four:

referring to fig. 16 and 17, another downward-detachable fan filter system disclosed in the present invention is different from the second and third embodiments in that the linking and limiting assembly 8 has a different structure, and the installation of the diffuser 3 is not achieved by the engagement between the engaging block 81 (see fig. 15) and the engaging groove 611 (see fig. 15) while the installation of the high efficiency filter 21 is completed, but the installation of the diffuser 3 is achieved by the limitation of the sliding of the second connecting rod 6 by the self-locking of the screw connection, so as to prevent the interference of the friction between the engaging block 81 (see fig. 15) and the frame 12 caused by the manufacturing process and the smooth insertion of the engaging block 81 (see fig. 15) into the engaging groove 611 (see fig. 15), and avoid the noise generated by the friction between the engaging block 81 (see fig. 15) and the frame 12 when the engaging block 81 (see fig. 15) slides, which.

The linkage limiting component 8 comprises a second gear 86 and a gear sleeve 87, the second gear 86 is sleeved and fixed on the first sleeve 42, the second gear 86 is positioned below the bearing block 43, the gear sleeve 87 is sleeved and fixed on the second sleeve 5 and the second main rod 61, the second sleeve 5 comprises a main cylinder part 52 and an extension part 53, the main cylinder part 52 is fixed with the main box body 11, the extension part 53 is fixed at the bottom end of the main cylinder part 52, the thickness of the extension part 53 is smaller than that of the main cylinder part 52, the second limiting block 62 is vertically and slidably connected with the main cylinder part 52, the second main rod 61 is vertically and slidably matched with the inner wall of the second limiting protrusion 51, the second main rod 61 is vertically and slidably matched with the extension part 53, the gear sleeve 87 is sleeved on the second main rod 61, the top of the gear sleeve 87 is provided with a first groove 871 for embedding the extension part 53, the extension part 53 is in threaded connection with the inner side wall of the first groove 871, the thread bulge for threaded connection on the extension part 53 is the same as the thread bulge thread pitch for threaded connection on the second main rod 61, the number of turns of the thread bulge on the extension part 53 is more than that of the thread bulge on the second main rod 61, the gear sleeve 87 is meshed with the second gear 86, a first opening 872 for the bracket 7 to pass through when the gear sleeve 87 rotates is horizontally arranged on the gear sleeve 87, a second opening 873 for the bracket 7 to pass through when the second main rod 61 moves downwards is vertically arranged on the gear sleeve 87, and the first opening 872 is communicated with the second opening 873.

The implementation principle of the embodiment is as follows: after the operator fixedly mounts the main box body 11 on the keel through the hanger rod passing through the lifting lug 111, the second main rod 61 extends out of the bottom of the second sleeve 5 under the action of gravity, and the second limiting block 62 abuts against the second limiting protrusion 51, the operator moves the diffusion plate 3 and aligns the clamping frame 31 with the connecting groove 631, and then the operator horizontally moves the diffusion plate 3 to embed the clamping frame 31 into the connecting groove 631, so that the second connecting rod 6 is connected with the diffusion plate 3.

An operator places the high-efficiency filter 21 fixed with the cushion frame 22 on the bracket 7, the bottom of the filtering frame cushion positioned at the bottom of the high-efficiency filter 21 is abutted against the bracket 7, the bracket 7 is abutted against two side surfaces of the high-efficiency filter 21, the operator pushes the high-efficiency filter 21 to enable the end surface of the high-efficiency filter 21 to be abutted against the stop block 32, the high-efficiency filter 21 and the cushion frame 22 are aligned to the first bulge 113, the operator lifts the diffuser 3 and moves the diffuser 3 upwards, the high-efficiency filter 21, the bracket 7 and the second connecting rod 6 synchronously move upwards, the first bulge 113 is embedded into a space surrounded by the cushion frame 22 positioned at the top of the high-efficiency filter 21, the outer side wall of the first bulge 113 is abutted against the inner wall of the cushion frame 22 positioned at the top of the high-efficiency filter 21, the cushion frame 22 positioned at the top of the high-efficiency filter 21 is abutted against, an operator can clamp the hexagonal keys into the hexagonal groove 421 one by one and rotate the first sleeve 42 by 90 degrees, the receiving block 43 and the second gear 86 rotate synchronously to drive the gear sleeve 87 to rotate, the clamping frame 31 is clamped into the clamping groove 611 to limit the rotation of the connecting block 63 and the second main rod 61, and the operator continuously lifts the diffuser plate 3, so that the gear sleeve 87 moves vertically downwards in the rotation process, the gear sleeve 87 is in threaded connection with the second main rod 61, the receiving block 43 is abutted against the bottom surface of the cushion frame 22 at the bottom of the high-efficiency filter 21, the receiving block 43 receives the high-efficiency filter 21 from the bottom, the gear sleeve 87 realizes the fixation of the diffuser plate 3 through the self-locking function of the threaded connection, and the synchronous installation of the high-efficiency filter 21 and the diffuser plate 3 is realized.

When the high-efficiency filter 21 needs to be replaced, an operator clamps the hexagonal keys into the hexagonal grooves 421 one by one and rotates the first sleeve 42 in the reverse direction, during the period, the operator keeps manually supporting the diffuser plate 3, the bearing block 43 and the second gear 86 rotate in the reverse direction synchronously, the gear sleeve 87 rotates in the reverse direction, the gear sleeve 87 moves upwards vertically and gradually releases the threaded connection with the second main rod 61, the limitation on the sliding of the second main rod 61 is released, meanwhile, the bearing block 43 moves away from the lower part of the high-efficiency filter 21, the operator can move the diffuser plate 3 downwards and synchronously move the used high-efficiency filter 21 downwards, and the new high-efficiency filter 21 is arranged on the bracket 7, and then, the operator installs the new high-efficiency filter 21 again, so that the replacement of the high-efficiency filter 21 is realized.

Example five:

a method for replacing an efficient filter 21 in a downward-dismounting type fan filtering system based on the second embodiment, the third embodiment and the fourth embodiment comprises the following steps:

s1, manually lifting the flow dispersing plate 3, clamping a hexagonal key into the hexagonal groove 421, rotating the first sleeve 42 by 90 degrees, driving the bearing block 43 to rotate, removing the bearing block from the bottom of the high-efficiency filter 21, and removing the vertical movement limitation of the second main rod 61 under the driving of the linkage limiting component 8;

s2, lifting the flow dispersing plate 3 and moving the flow dispersing plate 3 downwards to drive the second connecting rod 6, the bracket 7 and the used high-efficiency filter 21 to move downwards, and stopping the downward movement of the flow dispersing plate 3 when the second limiting block 62 is abutted to the second limiting bulge 51;

s3, removing the used high efficiency filter 21 from the bracket 7, placing the new high efficiency filter 21 to which the cushion frame 22 is fixed on the bracket 7, and abutting the end face of the high efficiency filter 21 against the stopper 32;

s4, the flow dispersing plate 3 is lifted and moved upwards, the second connecting rod 6, the bracket 7 and the new efficient filter 21 are driven to move upwards, the flow dispersing plate 3 stops moving when the cushion frame 22 at the top of the efficient filter 21 is abutted to the main box body 11, and the inner wall of the cushion frame 22 at the top of the efficient filter 21 is abutted to the outer side wall of the first bulge 113;

s5, the hexagonal key is clamped into the hexagonal groove 421, the first sleeve 42 is rotated in a 90-degree reverse direction, the receiving block 43 is driven to rotate in a reverse direction, the receiving block 43 is rotated to abut against the cushion frame 22 at the bottom of the high-efficiency filter 21, the receiving block 43 bears the newly replaced high-efficiency filter 21 from the bottom, and meanwhile, the vertical movement of the second main rod 61 is synchronously limited under the drive of the linkage limiting assembly 8, so that the synchronous installation of the high-efficiency filter 21 and the flow dispersing plate 3 is realized.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a lower disconnect-type fan filtration system which characterized in that: the fan box body (1) is arranged at the bottom of the fan box body (1) and is detachably connected with the fan box body (1), the fan box body (1) comprises a main box body (11) and a frame body (12), the main box body (11) is used for being fixed on a keel, the frame body (12) is fixed at the bottom of the main box body (11), the filter component (2) is arranged in a space enclosed by the frame body (12), the diffuser plate (3) is positioned below the filter component (2), a first limiting component (4) used for limiting the filter component (2) is arranged below the main box body (11), and the filter component (2) and the main box body (11) are enabled to be in adjustable abutting connection;

the first limiting assembly (4) comprises a first connecting rod (41), a first sleeve (42) and a bearing block (43), the first connecting rod (41) is fixed at the bottom of the main box body (11), the first sleeve (42) is rotatably connected to the first connecting rod (41), the bearing block (43) is fixed on the first sleeve (42), and the bearing block (43) is abutted to the bottom surface of the filtering assembly (2);

be provided with second sleeve (5) on the main tank body (11), there is second connecting rod (6) along framework (12) direction of height sliding connection on second sleeve (5), second connecting rod (6) can be dismantled with scattered board (3) and be connected, install on second connecting rod (6) lateral wall and be used for accepting bracket (7) of filter component (2) from the bottom, be provided with on first sleeve (42) and realize realizing gliding restriction or the spacing subassembly (8) of linkage of removing the restriction of second connecting rod (6) when accepting piece (43) pivoted, first sleeve (42) pierce through scattered board (3).

2. The lower fan filter system of claim 1, further comprising: first wind gap (112) have been seted up to main tank body (11) bottom, main tank body (11) bottom is fixed with first arch (113) that encircle first wind gap (112) and set up, filtering component (2) include high efficiency filter (21) and cushion frame (22), cushion frame (22) inner wall and first protruding (113) lateral wall butt, cushion frame (22) and main tank body (11) bottom surface butt.

3. The lower fan filter system of claim 2, further comprising: bracket (7) medial surface and high efficiency filter (21), cushion frame (22) lateral part butt, be provided with dog (32) on the board (3) of loosing, high efficiency filter (21), cushion frame (22) tip and dog (32) butt, first arch (113) is aimed at to cushion frame (22) that lie in high efficiency filter (21) top when high efficiency filter (21) and bracket (7) medial surface, dog (32) butt.

4. The lower fan filter system of claim 3, further comprising: joint groove (611) have been seted up to second connecting rod (6) lateral part, spacing subassembly of linkage (8) are including joint piece (81) and linkage subassembly, joint piece (81) embedding joint groove (611), the linkage subassembly drives joint piece (81) embedding joint groove (611) when first sleeve (42) rotates.

5. The lower fan filter system of claim 4, further comprising: the linkage subassembly includes first connecting rod (84) and second connecting rod (85), joint piece (81) and framework (12) sliding connection, first connecting rod (84) are fixed on first sleeve (42) lateral wall, second connecting rod (85) articulate on first connecting rod (84), joint piece (81) are articulated with second connecting rod (85).

6. The lower fan filter system of claim 4, further comprising: the linkage assembly comprises a first gear (82) and a first rack (83), the first gear (82) is fixed on the first sleeve (42), the first rack (83) is connected with the frame body (12) in a sliding mode, and the clamping block (81) is fixed on the first rack (83).

7. The lower fan filter system of claim 3, further comprising: linkage spacing subassembly (8) include second gear (86) and gear sleeve (87), gear sleeve (87) cover is established on second connecting rod (6), gear sleeve (87) and second connecting rod (6) normal running fit, gear sleeve (87) one end and second sleeve (5) threaded connection, the other end and second connecting rod (6) threaded connection, second gear (86) are fixed on first sleeve (42), second gear (86) highly are less than the height of gear sleeve (87), second gear (86) and gear sleeve (87) meshing.

8. The lower fan filter system of any of claims 1-7, wherein: the main box body (11) is provided with a wind pressure detection module for detecting the wind intensity of the blown filter assembly (2).

9. A high efficiency filter replacement method based on the lower-dismantling fan filter system as set forth in any one of claims 3 to 7, wherein: the method comprises the following steps:

s1, rotating the first sleeve (42) to drive the bearing block (43) to rotate, and releasing the sliding limitation of the second connecting rod (6) under the drive of the linkage limiting component (8);

s2, lifting the flow dispersing plate (3) and moving the flow dispersing plate (3) downwards to drive the second connecting rod (6), the bracket (7) and the used high-efficiency filter (21) to move downwards;

s3, removing the used high-efficiency filter (21) from the bracket (7), placing the high-efficiency filter (21) with the buffer cushion frame (22) fixed thereon on the bracket (7), and enabling the high-efficiency filter (21) to be abutted against the stop block (32);

s4, lifting the flow dispersing plate (3) and moving the flow dispersing plate (3) upwards to drive the second connecting rod (6), the bracket (7) and the new high-efficiency filter (21) to move upwards, wherein the buffer cushion frame (22) on the high-efficiency filter (21) is abutted against the side wall of the first bulge (113) and the main box body (11);

s5, the first sleeve (42) is rotated reversely to drive the bearing block (43) to rotate reversely, the bearing block (43) bears the newly replaced high-efficiency filter (21) from the bottom, the second connecting rod (6) is limited to slide under the drive of the linkage limiting assembly (8), and the flow dispersing plate (3) is fixed on the fan box body (1).