CN217057848U - Air filter screen - Google Patents

Abstract

The utility model discloses an airstrainer, including crossing filter core and frame, the frame includes the first frame that two front and back intervals set up, but first frame is including top frame and the underframe of lock each other, top frame with the underframe passes through the rotating-structure and rotates the connection, top frame with under the underframe lock state, top frame with the centre gripping is fixed with between the underframe filter core. The utility model realizes the detachable connection of the filter element and the frame, and does not need to be connected with the frame for complete replacement, and the frame can be repeatedly used to avoid waste; in addition, compared with the existing product which is assembled in a plug-in mode to realize detachable connection, the top frame and the bottom frame which are connected in a rotating mode are buckled to clamp the filter element, so that the aiming link is reduced, the disassembly is more convenient, the phenomenon of losing parts is avoided, and the overall connectivity and the experience of a user are improved; through this installation the utility model discloses an airstrainer, user only need order solitary filter core and can realize changing, have greatly reduced manufacturing cost.

Description

Air filter screen

Technical Field

The utility model relates to an air filter screen technical field especially relates to an air filter screen.

Background

Along with the improvement of the quality of life of people, the requirement on the air quality is gradually paid attention to, and air purification devices or ventilation equipment are equipped in a plurality of buildings or on household appliances. Because on current air purification and ventilation equipment, the airstrainer of being equipped with is basically for the mode through the hot melt fixed with the frame, even the whole set of change of frame usually when crossing filter core and need changing, and this kind of a whole set of mode of changing carries out, and the production preparation in practical application and the cost of maintaining are all higher, also arouse very big waste, for this reason we designed specially the utility model discloses.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that needs the whole set of change of frame to filter core, use cost height on the existing equipment who mentions among the above-mentioned background art, provide a frame circulated use, convenient renew cartridge, with low costs airstrainer.

In order to solve the technical problem, the utility model discloses the mesh above-mentioned is realized, the utility model provides an airstrainer, including crossing filter core and frame, the frame includes the first frame that two front and back intervals set up, first frame is including top frame and the underframe of lock each other, top frame with the underframe is passed through rotating-structure and is rotated the connection, top frame with under the underframe lock state, top frame with the centre gripping is fixed with between the underframe filter core.

In an embodiment, one end of the top frame is hinged to the bottom frame to form a hinged end, the other end of the top frame is provided with a free end, and the top frame and the bottom frame form an opening mode and a closing mode; in the closed mode, the free end of the top frame abuts against the bottom frame, and the top frame is connected with the bottom frame in a clamping mode through a clamping structure in a clamping mode so as to clamp the filter element; and in the opening mode, the free end of the top frame is separated from the bottom frame.

In an implementation manner, the engaging structure is an elastic piece, the top frame is provided with a first groove, and the bottom frame is provided with a second groove, so that the second groove is provided with a top and a bottom which are bent inwards; the first end of the elastic piece is clamped in the first groove, the second end of the elastic piece is in floating connection with the second groove, and the length of the elastic piece is larger than the distance between the first groove and the second groove.

In the open mode, the elastic sheet bends downwards, and the second end abuts against the bottom; under the closed mode, the elastic sheet is bent upwards, the second end is abutted to the top, and the top frame is restrained and buckled on the bottom frame by the elastic sheet.

In an implementation manner, the bottom frame is provided with an insertion cavity along a length direction thereof, a first elastic member is installed in the insertion cavity, and the filter element is arranged between the first elastic member and the insertion cavity so as to clamp the filter element.

In an embodiment, the filter element includes a clamping portion disposed in the insertion cavity, and the clamping portion includes a side clamping section disposed between the first elastic member side wall and the insertion cavity and a bottom clamping section disposed between the first elastic member bottom and the insertion cavity.

In one embodiment, the frame further comprises two second frames which are arranged at left and right sides at intervals, and the first frames and the two sides of the second frames are connected with each other through connecting pieces to form a shaping frame.

In an embodiment, a second elastic member is inwardly disposed on a side wall of the second frame, a clamping channel is formed between the two second elastic members, the filter element is placed in the clamping channel, and the filter element is abutted against the second elastic member.

In an implementation manner, the second frame comprises a clamping piece, and the clamping piece and the second frame are detachably arranged; and in the mounting state of the clamping piece, the second elastic piece is clamped by the clamping piece to keep a compressed state.

In one embodiment, the filter element comprises a stretching portion with a longitudinal section forming a wave-shaped structure, and the stretching portion can be stretched or compressed in the front-back direction.

In one embodiment, the filter element is provided as a multi-composite layer with support properties, including a planar air filter layer, a plastic mesh layer and/or a metal mesh layer.

Compared with the prior art, the utility model relates to an airstrainer has following beneficial effect:

1. the purpose of fixing the filter element on the frame can be realized by fixing the filter element on two first frames which are arranged at intervals from front to back; the first frame comprises a top frame and a bottom frame, the top frame and the bottom frame are rotatably connected and can be mutually buckled, and the filter element is clamped and fixed in the buckled state, so that the detachable connection of the filter element and the frame is realized, the whole frame is not required to be replaced, and the frame can be repeatedly used to avoid waste; in addition, compared with the existing product which is assembled in a plug-in mode to realize detachable connection, the top frame and the bottom frame which are connected in a rotating mode are buckled to clamp the filter element, so that the aiming link is reduced, the disassembly is more convenient, the phenomenon of losing parts is avoided, and the overall connectivity and the experience of a user are improved; through installing the air filter screen of the utility model, a user only needs to order an independent filter element to realize replacement, thereby greatly reducing the production cost;

2. the first frame comprises a top frame and a bottom frame, the top frame is hinged with the bottom frame, the top frame only needs to be turned over to open when the filter element is installed or disassembled, the first frame is matched with the clamping structure for use, the installation and disassembly processes can be realized through opening and closing of the free end and the bottom frame, the hinged connection mode enables the top frame and the bottom frame to be clamped as required without alignment when the top frame and the bottom frame are clamped, the use is convenient, the integrity is high, and the parts are not required to be lost;

3. the elastic sheet is arranged as a clamping force source of the clamping structure, two ends of the elastic sheet are respectively clamped on the top frame and the bottom frame, the length of the elastic sheet is larger than the distance between the first groove and the second groove, so that the elastic sheet is bent to form elastic torsion when the elastic sheet is opened or closed, the top frame is buckled on the bottom frame through the elastic sheet when the top frame and the bottom frame are closed so as to clamp the filter element, and the first side frames oppositely arranged on two sides are mutually matched to form tension force, so that the effect of fixing the filter element can be achieved; the top and the bottom in the second groove are bent inwards, so that the possibility of slipping of the elastic sheet in the process of turning and twisting is greatly reduced;

4. an insertion cavity is formed in the bottom frame, and a first elastic piece is arranged in the insertion cavity, so that the filter element is extruded between the first elastic piece and the inner wall of the insertion cavity, and the effect of further fixing the filter element is achieved; the clamping part is arranged on the filter element and further extends to form a bottom surface clamping section and a side surface clamping section, so that the length and the area of the filter element subjected to the clamping force between the first elastic piece and the inner wall of the insertion cavity are increased, and the filter element and the first frame can be conveniently inserted and installed;

5. the first frame and the second frame are connected through a connecting piece, so that the frame has the detachable and customizable performance; the frame can be set in a shaping way through the connecting piece after the first frame or the second frame is added or adjusted according to the product requirements to flexibly adapt to various sizes;

6. in order to further improve the fixing effect and the clamping effect between the filter element and the frame, the second elastic pieces are arranged on the two second frames which are oppositely arranged left and right, so that the filter element is subjected to the mutual resilience extrusion of the second elastic pieces on the two sides, the fixation between the filter element and the second frames is realized, and the complexity of mounting or dismounting the filter element and the second frames is reduced;

7. the second elastic piece is arranged on the side wall of the second frame only, when the filter element is fixed with the first frame, the clamping and fixing piece is taken down, the second elastic piece rebounds to extrude the filter element, and the two frames are oppositely arranged left and right, so that the filter element is mutually extruded by the left side and the right side, and under the condition that the extrusion forces on the two sides are jointly applied, a locking effect can be obtained between the filter element and the second frame, the structure is simple, and the replacement is convenient;

8. the filter element is provided with a stretching part, the longitudinal section of the stretching part is of a wave-shaped structure, the filter element can be compressed to a smaller volume along the compression direction, namely the stretching direction when not used, the transportation is convenient, and the filter element can be stretched along the stretching direction to change the length when used; in addition, a plurality of standard folding numbers can be produced according to specifications, the compressed filter element is purchased, and the filter element is stretched, compressed or cut according to the size of the frame when in use, so that the device can adapt to various size requirements, and has wide adaptability, convenient use and low cost;

9. compared with the soft common air filtering filter paper, the filter element of the utility model needs a certain supporting and extending force, the plastic or metal net or plastic plus metal net with a certain supporting force is compounded on the filter paper, the supporting force for unfolding the filter paper can be further ensured, the filter paper can not collapse or deform when being subjected to large air pressure, and the filter paper also has a certain strength when being matched with the extrusion of the second elastic part, and can be well matched and fixed with the second elastic part;

therefore, the utility model has the characteristics of frame used repeatedly, dismantle simple, the cost is lower etc.

Drawings

Fig. 1 is a schematic view of the overall connection structure of the frame in embodiment 1 of the present invention;

fig. 2 is a schematic side view of the installation of the first side and the first side frame of embodiment 1 of the present invention;

fig. 3 is a schematic side view of the second side and the second side frame of embodiment 2 of the present invention when not installed;

fig. 4 is an enlarged view of the three-dimensional structure of fig. 3 according to the present invention;

fig. 5 is a schematic side view of the second side and the second side frame of embodiment 2 of the present invention;

fig. 6 is an enlarged view of the three-dimensional structure of fig. 5 according to the present invention;

fig. 7 is a schematic view of a multi-layer structure of a filter element according to embodiment 2 of the present invention;

fig. 8 is a schematic side view of the installation process of the first side and the first frame according to embodiment 3 of the present invention;

fig. 9 is an overall structural diagram of an installation process of the pulling out of the clamping member according to embodiment 3 of the present invention;

fig. 10 is an overall view of an air filter device according to embodiment 3 of the present invention;

in the figure: 1. the filter element comprises a filter element, 2, a first edge, 3, a frame, 4, a first frame, 5, a second frame, 6, a connecting piece, 7, a top frame, 8, a bottom frame, 9, an elastic sheet, 10, a first groove, 11, a second groove, 12, an insertion cavity, 13, a first elastic piece, 14, a left inner wall, 15, a right inner wall, 16, a second edge, 17, a second elastic piece, 18, a clamping piece, 19, a protruding part, 20, a placing part, 21, a sealing part, 22, a side clamping section, 23, a bottom clamping section, 24, a top and 25.

Detailed Description

To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and obviously, 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 the skilled in the art without creative work belong to the protection scope of the present invention.

In the following embodiments, the front, the back, the left and the right are all described and used according to the relative orientation relationship of the integral filter core in the abstract drawing.

Example 1:

fig. 1 to fig. 2 show an embodiment of the present invention, including filter element 1 and frame 3, filter element 1 is the rectangle that conventional frequency of use is the highest with frame 3 in this scheme, filter element 1 includes the first limit 2 of two relative settings and the double-phase second limit 16 that sets up relatively, frame 3 includes the first frame 4 that two front and back intervals set up and the second frame 5 that two left and right sides intervals set up, wherein, first limit 2 detachable is connected to first frame 4, the lateral wall of second limit 16 and second frame 5 extrudees each other through second elastic component 17, realize the demountable installation of filter element 1 and frame 3.

In this scheme, as shown in fig. 1, first frame 4 and second frame 5 form the design frame through connecting piece 6 interconnect, so in the actual customization, can select to increase first frame 4 or 5 numbers of second frame and realize the concatenation of many frames according to the demand, wherein connect connecting piece 6 of first frame 4 and second frame 5 for standard connecting piece 6 in the trade, like the angle sign indicating number.

In this scheme, as shown in fig. 2, the first frame 4 includes a top frame 7 and a bottom frame 8, and the top frame 7 and the bottom frame 8 are rotatably connected and can be buckled with each other. One end of the top frame 7 is hinged with the bottom frame 8 to form a hinged end, the other end of the top frame 7 is set as a free end, and an opening mode and a closing mode are formed between the top frame 7 and the bottom frame 8; in a closed mode, the free end abuts against the bottom frame 8, the top frame 7 is connected with the bottom frame 8 in a clamping mode through a clamping structure, and the first edge of the filter element 1 is clamped between the top frame 7 and the bottom frame 8; in the open mode, the free end of the top frame 7 is arranged separate from the frame.

In this scheme, first recess 10 has been seted up on the top frame 7, second recess 11 has been seted up on the underframe 8, the joint flexure strip 9 in first recess 10 and the second recess 11, the first end block of flexure strip 9 is in first recess 10, the second end and the second recess 11 of flexure strip 9 float to be connected, along with opening and shutting of top frame 7, flexure strip 9 one end is driven by top frame 7, the other end card is in second recess 11, the length that sets up flexure strip 9 is greater than the interval of first recess 10 and second recess 11, when making top frame 7 and underframe 8 closed, flexure strip 9 receives the extrusion and presents the camber, flexure strip 9 takes place the upset to present the inverse arc shape as the fulcrum when top frame 7 rotates to open for underframe 8, thereby realize that the elasticity between top frame 7 and the underframe 8 is opened and is closed.

Furthermore, in the present solution, the second groove 10 is provided with a top 24 and a bottom 25 which are inwardly bent, that is, in the open mode, the elastic sheet 9 is bent downward, and the second end abuts against the bottom 25; in the closed mode, the elastic piece 9 bends upwards, the second end is abutted against the top part 24, and the top frame 7 is buckled on the bottom frame 8 under the restraint of the elastic piece 9. By switching between the open and closed mode, the second end of the spring plate 9 slides in the second groove 11, forming a floating connection with the second groove 11. In the present embodiment, the top portion 24 and the bottom portion 25 are both free ends of the second groove 11, which are bent inward, so that the second end of the elastic sheet 9 can be effectively prevented from slipping during the inward bending and outward bending turning process, and the second end is limited.

It should be further noted that in the present scheme, the first end of the elastic sheet 9 and the first groove 10 may be fixedly connected or movably connected, and under the condition of movable connection, the first groove 10 should be set to a narrow gap, so that the first end can be driven by the top frame 7 and cannot slip off; under the condition of fixed connection, as long as the second end can keep the movable state, the technical means in the scheme can still be effectively realized.

It should be noted that a space needs to be reserved between the elastic sheet 9 and the top frame 7, for the elastic sheet 9 to be turned over, that is, a space for the elastic sheet 9 to bend upwards is reserved; therefore, the top frame 7 further comprises a protrusion 19 protruding downwards, the first groove 10 is formed on the protrusion 19, and the top frame 7 is pressed with the bottom frame 8 through the protrusion 19 when being closed.

In this scheme, underframe 8 is equipped with along its length direction and inserts chamber 12, installs first elastic component 13 in inserting chamber 12, and first elastic component 13 one end is fixed and is being inserted the left inner wall 14 of chamber 12, the other end and receive the right inner wall 15 extrusion that inserts chamber 12 for the free end, and the first side 2 of filter core 1 is placed between first elastic component 13 and the right inner wall 15 that inserts the chamber to it is fixed to carry out the centre gripping to first side 2.

In order to further increase the connectivity of filter element 1 and first frame 4, first side 2 is including setting up the clamping part in inserting chamber 12 in this scheme, and the clamping part is including setting up at the side clamping section 22 of first elastic component 13 lateral wall and right inner wall 15 and setting up at the bottom clamping section 23 of first elastic component 13 bottom and inserting chamber 12 to the length and the area of increase centre gripping, overall structure is laminated more.

In this embodiment, the first elastic member 13 is made of sealing cotton.

Example 2:

in this embodiment 2, the connection between the second edge 16 and the second frame 5 is further improved on the basis of the embodiment 1.

As shown in fig. 3 and 4, the side wall of the second frame 5 is provided with a second elastic member 17 facing inwards, a clamping channel is formed between the two second elastic members 17, the filter element 1 is placed in the clamping channel, and the filter element 1 is abutted against the second elastic members 17.

In the scheme, the second elastic piece 17 can be fixed and kept in a compressed state through the clamping piece 18, and the clamping piece 18 is detachably arranged to realize compression and rebound of the second elastic piece 17; when the clamping and fixing piece 18 is installed on the second frame 5, the second elastic piece 17 is clamped between the clamping and fixing piece 18 and the side wall of the second frame 5 to keep the compression state of the second elastic piece 17; when the clamping member 18 is separated from the second frame 5, the second elastic member 17 rebounds, and when the first edge 2 is fixed, the second edge 16 is locked with the second frame 5 by the rebounding and pressing of the second elastic member 17 oppositely arranged at two sides.

In this scheme, as shown in fig. 5, the fastener 18 is a U-shaped fastener, and the second frame 5 is at least provided with an installation groove for the fastener 18 to be installed, or the second frame 5 is provided with the same structure as the first frame 4, so that the fastener 18 is clamped on the inner wall of the insertion cavity 12 of the bottom frame 8. Through the setting of second elastic component 17 for filter core 1 is more convenient with the installation of dismantling with frame 3, has avoided first frame 4, second frame 5 all to aim at the loaded down with trivial details of pegging graft among other prior art, still has the fixed and sealed effect of centre gripping simultaneously.

In this embodiment, as shown in fig. 6 and 7, the filter element 1 includes a stretching portion having a longitudinal section formed in a wave-like structure, and the stretching portion is provided so as to be stretchable or compressible in the front-rear direction;

further, the whole filter element 1 may be provided as a stretching portion, that is, the longitudinal section of the second side 16 is a W-shaped structure, such as a louver type or a folding fan type that can be folded back and forth on the front and back sides, so that the filter element 1 can be stretched or compressed along the length direction of the second side 16 to change the distance between the two first sides 2.

In practical application, the folding number of the filter core 1 can be specified according to the specification type of general size, the folding number is divided into several standards, the filter cores 1 with different folding numbers are customized according to the size of the frame 3 when in use, and the longitudinal section of the second edge 16 is a W-shaped expansion surface formed by stretching, so that the filter core can meet the requirements of various sizes, can be flexibly adjusted and is convenient to transport; in addition, the W-shaped structure increases the contact surface between the second edge 16 and the second elastic element 17, and improves the stability of the installation of the filter element 1.

It will be appreciated that the length of the first edge 2 may be tailored to the actual frame 3 size.

In this scheme, underframe 8 still includes the portion of placing 20, and the portion of placing 20 is located underframe 8 bottom for shelve second elastic component 17 and filter element 1, improve the steadiness of filtering element 1.

Further, in order to improve the overall strength and the supporting performance of the filter element 1, the filter element 1 is provided with a plurality of composite layers with supporting performance, such as a composite of a planar air filter layer and a plastic mesh layer, or a composite of a planar air filter layer and a metal mesh layer, or a composite of a planar air filter layer, a plastic mesh layer and a metal mesh layer.

In this scheme, second elastic component 17 is sealed cotton, and sealed cotton adoption makes first elastic component 13 and second elastic component 17 still have sealed function concurrently except having the extrusion function that elasticity brought, better packing filter element 1 and the space between the installation of frame 3.

The rest is the same as the above embodiment 1, and is not described herein.

Example 3:

embodiment 3 is based on embodiment 1 or embodiment 2, and the structure of the top frame 7 is further improved to form a frame 3 structure as shown in fig. 8.

The top frame 7 is also provided with a sealing part 21, the sealing part 21 extends from the position of the protrusion 19 to the direction of the filter element 1, the distance between the sealing part 21 and the bottom frame 8 is increased by the sealing part 21 matching with the protrusion 19, and a sufficient space is provided between the second elastic piece 17 and the height of the filter element 1; and the arrangement of the edge sealing part 21 also limits the height of the side surface of the filter element 1, so that the whole part between the first frame 4 and the second frame 5 and the filter element 1 is kept stable, and meanwhile, the aesthetic property of the filter element 1 when being installed on the frame 3 is also improved.

By implementing the scheme, the overall structural schematic diagram of the filter element can be shown in fig. 9 and fig. 10.

The rest is the same as the above embodiments, and is not described herein.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An airstrainer, its characterized in that: including filtering core (1) and frame (3), frame (3) are including first frame (4) that two back-front intervals set up, first frame (4) are including top frame (7) and underframe (8) of lock each other, top frame (7) with underframe (8) rotate through rotating-structure and connect, top frame (7) with under underframe (8) lock state, top frame (7) with the centre gripping is fixed with between underframe (8) filter core (1).

2. An airstrainer according to claim 1, characterised in that: one end of the top frame (7) is hinged with the bottom frame (8) to form a hinged end, the other end of the top frame (7) is a free end, and an opening mode and a closing mode are formed between the top frame (7) and the bottom frame (8); in the closed mode, the free end of the top frame (7) abuts against the bottom frame (8), and the top frame (7) is connected with the bottom frame (8) in a clamping mode through a clamping structure in a clamping mode so as to clamp the filter element (1); in the open mode, the free end of the top frame (7) is arranged separately from the bottom frame (8).

3. An airstrainer according to claim 2, characterised in that: the clamping structure is an elastic sheet (9), a first groove (10) is formed in the top frame (7), a second groove (11) is formed in the bottom frame (8), and therefore the second groove (11) is provided with a top portion (24) and a bottom portion (25) which are bent inwards; the first end of the elastic sheet (9) is clamped in the first groove (10), the second end of the elastic sheet (9) is in floating connection with the second groove (11), and the length of the elastic sheet (9) is larger than the distance between the first groove (10) and the second groove (11);

in the open mode, the elastic sheet (9) bends downwards, and the second end abuts against the bottom (25); in the closed mode, the elastic sheet (9) bends upwards, the second end of the elastic sheet abuts against the top part (24), and the top frame (7) is restrained and buckled on the bottom frame (8) by the elastic sheet (9).

4. An airstrainer according to any one of claims 1 to 3, characterised in that: underframe (8) are equipped with insert chamber (12) along its length direction, install first elastic component (13) in insert chamber (12), filter core (1) sets up first elastic component (13) with insert between chamber (12), in order to right filter core (1) carry out the centre gripping.

5. An airstrainer according to claim 4, characterised in that: the filter element (1) comprises a clamping part arranged in the insertion cavity (12), and the clamping part comprises a side clamping section (22) arranged on the side wall of the first elastic part (13) and between the insertion cavity (12) and a bottom clamping section (23) arranged on the bottom of the first elastic part (13) and between the insertion cavity (12).

6. An airstrainer according to any one of claims 1 or 2 or 3 or 5, characterised in that: frame (3) still include second frame (5) that two left and right sides intervals set up, arbitrary first frame (4) and both sides all form the design frame through connecting piece (6) interconnect between second frame (5).

7. An airstrainer according to claim 6, characterised in that: the lateral wall of second frame (5) is provided with second elastic component (17) inwards, two form between second elastic component (17) and press from both sides tight passageway, filter core (1) is placed press from both sides tight passageway in, filter core (1) with second elastic component (17) butt sets up.

8. An airstrainer according to claim 7, wherein: the second frame (5) comprises a clamping and fixing piece (18), and the clamping and fixing piece (18) and the second frame (5) are detachably arranged; and in the installation state of the clamping and fixing piece (18), the second elastic piece (17) is clamped and held in a compression state through the clamping and fixing piece (18).

9. An airstrainer according to claim 7 or 8, characterised in that: the filter element (1) comprises a stretching part with a wave-shaped structure formed on the longitudinal section, and the stretching part can be stretched or compressed along the front-back direction.

10. An airstrainer according to claim 9, characterised in that: the filter element (1) is provided with a plurality of composite layers with supporting performance, and comprises a plane air filtering layer, a plastic net layer and/or a metal net layer.

Images