CN214501462U - Filter screen installation component and air conditioner - Google Patents

Abstract

The utility model provides a filter screen installation component and air conditioner, filter screen installation component includes: the filter screen is provided with at least one locking piece mounting area; further comprising: the locking piece is arranged in the locking piece mounting area; the two ends of the locking piece can rotate in the mounting area of the locking piece so as to realize the disassembly and assembly of the filter screen. The utility model discloses a locking piece is on the filter screen, through the two pairs of rotations at locking piece both ends in the filter screen installation, realizes the dismouting of filter screen, has improved dismouting efficiency for the filter screen installation is more convenient; simultaneously, through set up the installation that the locking piece realized the filter screen on the filter screen, the space that occupies when having reduced the filter screen installation.

Description

Filter screen installation component and air conditioner

Technical Field

The utility model relates to an air conditioner technical field particularly, relates to a filter screen installation component and air conditioner.

Background

At present, the air conditioner is equipped with a filter screen for filtering impurities in the air and preventing the evaporator from being blocked. The filter screen is generally arranged on the shell of the air conditioner by the aid of the buckle assembly, but the buckle assembly is complex in structure, high in production difficulty and high in cost; and the filter screen relies on the buckle subassembly to install when the air conditioner main part, still need adopt a plurality of screws to fix to influenced production efficiency, increased manufacturing cost.

In order to filter impurities in air, a filter screen is usually installed in an existing air conditioner indoor unit, but the filter screen must be cleaned after a long time, so that the problem of unsmooth air inlet is avoided. The current air conditioner, filter screen installation back, the buckle setting is in the inboard of filter screen and center, and the whole surface of filter screen is smooth, does not have the impetus that can the application of force during the dismantlement, disassembles relatively complicacy, wastes time and energy, and damages the filter screen easily.

SUMMERY OF THE UTILITY MODEL

The utility model provides a how to prevent filter screen dismouting difficulty, it is big to dismantle the degree of difficulty, leads to the problem of filter screen damage.

In order to solve the above problem, the utility model provides a filter screen installation component, include: the filter screen is provided with at least one locking piece mounting area; the filter screen mounting assembly further comprises: at least one locking member disposed within the locking member mounting area; each of the locking pieces includes: a locking part and a detaching part; when the locking piece rotates, the locking or unlocking is realized by the locking part, so that the filter screen is disassembled and assembled.

The utility model discloses the dismouting of filter screen is realized through rotating locking piece to filter screen installation component in the installation; when the locking fastener rotates to the locking position, the locking part realizes locking; when the locking fastener rotates to the unlocking position, the locking part realizes unlocking; meanwhile, the disassembling part is used for holding and applying external force to enable the locking piece to rotate on one hand, so that the locking and unlocking processes are realized; on the other hand, the disassembling part is used for holding, so that the filter screen assembly in an unlocking state can be conveniently disassembled; the disassembly and assembly efficiency is greatly improved, the disassembly difficulty is reduced, and the filter screen is prevented from being damaged, so that the filter screen is more convenient to install; simultaneously, through set up the installation that the locking piece realized the filter screen on the filter screen, the space that occupies when having reduced the filter screen installation.

Further, the locking member includes: the body is provided with a lifting end and a locking end which are oppositely arranged; the lifting end is the dismounting part, and the locking end is the locking part; a rotating part disposed on the body; be provided with the pivot in the locking piece installing zone, the rotating part with the pivot is rotated and is connected, works as when the locking piece rotates, the locking end can switch between locking state and unblock state.

The lifting end is arranged and used for providing a force application position, so that the locking piece can rotate under the stress; meanwhile, the filter screen assembly is convenient to hold and detach and lift the filter screen assembly in an unlocked state; the locking end is used for realizing matched locking with the air conditioner middle frame in the installation process of the filter screen assembly, so that the filter screen assembly is installed on the middle frame; the rotating shaft is arranged to be rotationally connected with the rotating part, so that the lifting end and the locking end which are oppositely arranged on the locking piece can conveniently rotate around the rotating shaft, and the switching between the locking state and the unlocking state of the locking end is realized; the filter screen is convenient to disassemble and assemble.

Further, the locking end extends downward and bends or curves to a side away from the rotating portion.

The locking end is arranged to be bent or bent, so that the locking of the locking end is facilitated, and the filter screen is not easy to slip after being installed.

Further, the lift end comprises: the handle part is arranged on two sides of the rotating part opposite to the locking end; the filter screen buckling end is arranged on the side part of the body.

The handle part is arranged, so that a user can hold the filter screen conveniently when the filter screen is disassembled, and the disassembling efficiency is improved; meanwhile, the locking end and the locking end are oppositely arranged on two sides of the rotating part, so that a user can conveniently apply pulling force or downward pressure on the locking part through the handle part to realize the rotation of the locking part; the body lateral part sets up filter screen lock joint end, and filter screen lock joint end is protruding form to realize filter screen subassembly's locking through realizing interference fit with locking piece installing zone internal surface.

Further, the handle portion is protruding to be set up on the body, just the handle portion with the rotating part is located the relative both sides of body.

The user of being convenient for breaks the body at handle portion place through protruding, off with the fingers and thumb for the handle portion rotates around the rotating part, realizes the unblock of locking end, realizes the dismantlement of filter screen then.

Further, the handle portion with the rotating part is located same one side of body, the handle portion pass through the connecting piece with this body coupling.

The handle part is connected with one side of the body through the connecting piece, so that the connecting strength of the handle part is increased; correspondingly, the force arm of the handle part is prolonged, so that the rotation is more labor-saving.

Further, when the filter screen is in a locked state, the top surface of the body is flush with the top surface of the mounting area of the locking piece, and the handle part is hidden; when the filter screen is in the unblock state, the handle portion is followed the locking piece rotates, the handle portion is kept away from the locking piece installing zone, is convenient for hold the handle portion and dismantles the filter screen.

When the filter screen is in a locking state, namely the filter screen is in a state after being installed, the body is flush with the installation area of the locking piece, so that the handle part is convenient to hide, and the occupied space is reduced; make the installation of filter screen back compare in the installation of traditional filter screen, the structure is compacter, reasonable.

Further, the filter screen further comprises: the locking piece buckling end is arranged on one side in the locking piece mounting area and matched with the filter screen buckling end.

The filter screen fastening end is matched with the locking piece fastening end, and when the filter screen is in a locking state, the locking piece fastening end and the filter screen fastening end are fastened with each other; when a user applies pulling force to the handle part or downward pressure to the locking part, at least one of the buckling end of the locking piece and the buckling end of the filter screen is deformed, so that the buckling end of the locking piece and the buckling end of the filter screen are separated from each other, and the filter screen is convenient to disassemble when in an unlocking state. Of course, the fastening end of the filter screen may be a groove or a projection, and the fastening end of the locking member may be a projection or a groove disposed in cooperation with the fastening end of the filter screen.

Further, the filter screen further comprises: the limiting piece is arranged on one side in the locking piece mounting area and is positioned above the rotating shaft; for defining the locking member rotation angle.

The locating part is used for injecing locking piece turned angle's scope for handle portion place one end can rotate to the optimum and state, and convenience of customers dismantles the filter screen through handle portion, improves and dismantles efficiency.

The utility model also provides an air conditioner, include: the filter screen mounting assembly as described above; the upper end face of the middle frame is provided with a buckling part; when the filter screen mounting assembly is mounted on the middle frame, the abutting part and the locking part are locked.

The utility model discloses the air conditioner sets up the hasp portion cooperation setting that sets up on deduction portion and the filter screen installation component for filter screen installation component dismouting is more convenient, has improved filter screen dismouting efficiency greatly, simultaneously, through set up the installation that the filter screen was realized to the locking piece on the filter screen, space that occupies when having reduced the filter screen installation.

Furthermore, the abutting portion is a cross beam, at least one cross beam is arranged, and when the filter screen mounting assembly is assembled, the locking portion and the cross beam are locked.

The middle frame is at least provided with the cross beam and the lock catch part to realize mutual locking, so that the whole structure is simple, and the locking is convenient and fast.

Further, the middle frame comprises: at least one middle frame fastening region corresponding to the locking member mounting region; the support buckling part is a buckling shaft, the buckling shaft is arranged in the middle frame buckling area, and the buckling shaft and the locking part are locked when the filter screen mounting assembly is assembled.

The middle frame buckling area is arranged and provided with the buckling shaft, so that the buckling shaft is more stable when being locked by the buckling part, and the buckling shaft is prevented from being separated from the buckling part due to shaking generated in the using process of the air conditioner.

The utility model discloses following beneficial effect has:

1) the filter screen is convenient to disassemble and assemble, the disassembling and assembling efficiency is high, and the disassembling difficulty is small;

2) when the filter screen is installed, the installation is firm; the buckling shaft is not easy to separate from the locking end due to the shake generated in the use process of the air conditioner;

3) the handle part is easy to hide, and the installation space is small; compare in traditional filter screen installation, the structure is compacter, reasonable.

Drawings

Fig. 1 is a schematic structural diagram of a filter screen mounting assembly 1 of the present invention;

fig. 2 is a schematic structural diagram of the filter screen 10 in fig. 1;

FIG. 3 is a schematic view of the locking member 30 of FIG. 1;

FIG. 4 is a schematic view of another construction of the locking member 30;

fig. 5 is another schematic structural diagram of the filter screen 10;

fig. 6 is a schematic structural view of the air conditioner 100;

FIG. 7 is a structural diagram of the middle frame 20 in FIG. 6;

FIG. 8 is a schematic view of the locking member 30 of FIG. 6 in a locked and unlocked state;

FIG. 9 is an enlarged view of A in FIG. 8;

FIG. 10 is an enlarged view of B in FIG. 8;

FIG. 11 is a schematic view of another structure of the middle frame 20;

fig. 12 is another schematic diagram of the air conditioner 100;

FIG. 13 is an enlarged view of a portion C of FIG. 12;

fig. 14 is a schematic structural diagram illustrating the position of the position-limiting member 103 on the body 301 in fig. 13.

Description of reference numerals:

1-a filter screen mounting assembly; 10-a filter screen; 101 a rotating shaft; 102 a lock mounting area; 103-a stop; 104-a second card slot; 20-middle frame; 201 a cross beam; 202-an air inlet; 203-a fastening shaft; 204-middle frame engagement region; 30-a locking element; 301-a body; 302-a rotating part; 303 — a locking end; 3031-locking block; 3032-an extension block; 304 a lifting end; 3041-a handle part; 3042-buckling the end of the filter screen; 3043-locking piece snap-fit end; 305-shaft hole; 306-a connector; 100-air conditioner.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Example 1:

as shown in fig. 1, the present embodiment provides a filter screen mounting assembly 1, including a filter screen 10 and a locking member 30; the locking member 30 includes: a locking part and a detaching part; when the locking member 30 rotates, the locking portion is locked or unlocked to disassemble and assemble the filter screen 10.

Specifically, as shown in fig. 2, at least one locking piece mounting area 102 is arranged on the filter screen 10, and a rotating shaft 101 is arranged in the locking piece mounting area 102; as shown in fig. 3 and 4, the locking portion is a locking end 303, and the detaching portion is a lifting end 304; the locking member 30 further includes: a body 301; the lifting end 304 and the locking end 303 are oppositely arranged at two ends of the body 301; a rotating part 302 is further arranged between the lifting end 304 and the locking end 303, and the rotating part 302 is arranged on the body 301; the rotating part 302 is provided with a shaft hole 305, and the shaft hole 305 is matched and connected with the rotating shaft 101; the locking member 30 is allowed to rotate relative to the rotating shaft 101; the lifting end 304 is rotated to the position above the rotating shaft 101 by rotating the lifting end 304, correspondingly, the locking end 303 is rotated to the position below the rotating shaft 101, so that the filter screen 10 is unlocked, the filter screen 10 is lifted by the lifting end 304, namely, the filter screen 10 is dismounted, and the dismounting difficulty is greatly reduced; similarly, when the installation is needed, the lifting end 304 is pressed, so that the locking end 303 and the lifting end 304 rotate relative to the rotating shaft 101; so that the lifting end 304 and the locking end 303 are locked respectively, thereby realizing the installation of the filter screen 10.

For example, an opening is formed on one side of the shaft hole 305, and when the locking member 30 is assembled with the rotating shaft 101, at least one of the locking member and the rotating shaft 101 deforms, so that the rotating shaft 101 can be conveniently buckled into the shaft hole 305 from the opening; it can be understood that the width of the opening is smaller than the diameter of the shaft hole, so that the rotating shaft 101 is not easy to slip out after being buckled; meanwhile, the locking piece 30 is convenient to disassemble and assemble; of course, the rotating portion 302 may be the rotating shaft 101, and the corresponding shaft hole 305 may be disposed in the locking member mounting region 102, so as to achieve the mutual engagement.

Of course, the lifting end 304 and the rotating portion 302 may be located at two ends of the body 301, a locking end 303 is further disposed between the lifting end 304 and the rotating portion 302, and the locking end 303 is disposed on the body 301 to achieve rotational locking, which is not described in detail herein.

Example 2:

as shown in fig. 3, the locking end 303 extends downward and is bent away from the rotary portion 302.

Specifically, the locking end 303 comprises a locking block 3031 and an extension block 3032, one end of the extension block 3032 is connected with the lower surface of the body 301, and the other end is connected with the locking block 3031; the joint of the locking block 3031 and the extending block 3032 forms a certain angle, and bends towards the side far away from the rotating part 302. The joint of the locking block 3031 and the extension block 3032 is arranged to be in a bending shape, so that the locking block 3031 can be conveniently locked, and the filter screen 10 is not easy to slip after being installed.

As shown in fig. 3, the lift end 304 includes: the handle portion 3041 is connected to the screen fastening end 3042.

Specifically, the handle portion 3041 is disposed opposite to the locking end 303 on both sides of the rotating portion 302; the handle part 3041 is convexly arranged on the body 301, and the handle part 3041 and the locking end 303 are oppositely arranged at two sides of the rotating part 302; the strainer fastening end 3042 is disposed at the side of the body 301. The body 301 where the handle part 3041 is located is conveniently pulled by the user through the protrusion, so that the handle part 3041 rotates around the rotating part 302, the locking end 303 is unlocked, and the filter screen 10 is detached.

Example 3:

as shown in fig. 4, the locking end extends downward and is bent to a side away from the rotation portion 302.

Specifically, the locking end includes a locking block 3031, one end of the locking block 3031 is connected to the lower surface of the body 301, and the other end is bent in a groove shape towards the side far away from the rotating portion 302. The joint of the locking block 3031 and the extension block 3032 is arranged in a curved shape, so that the locking block 3031 can be conveniently locked, and the filter screen 10 is not easy to slip after being installed.

As shown in fig. 4, the handle portion 3041 and the rotating portion 302 are located on the same side of the body 301, and are disposed on two sides of the rotating portion 302 opposite to the locking block 3031, and the handle portion 3041 is connected to the body 301 through the connecting member 306; a first engaging groove (not shown) is formed at the joint of the handle part 3041 and the connecting member 306, and a filter fastening end 3042 is disposed at the side of the body 301. As can be appreciated, the handle part 3041 is provided to facilitate holding by a user when the filter screen 10 is disassembled, so as to improve the disassembling efficiency; meanwhile, the locking blocks 3031 are disposed on two sides of the rotating portion 302, so that the user can conveniently apply a pulling force to the handle portion 3041 or a downward pressure to the locking blocks 3031 to rotate the locking member 30.

Preferably, a distance between the handle portion 3041 and the rotation portion 302 is greater than a distance between the rotation portion 302 and the locking block 3031. It is more labor-saving for the user to open the locking member 30 through the handle portion 3041.

The structure of the handle part 3041 and the locking end of the present embodiment may be combined with the structure of the handle part 3041 and the locking end 303 of the embodiment 3.

Example 4:

as shown in fig. 3 and 4, the handle portion 3041 has an anti-slip surface for allowing the user to rotate the locking member 30 to prevent slipping; the force application surface here refers to a surface that applies a force to the handle portion 3041 when the user rotates the lock 30.

Further, as shown in fig. 5, the filter screen 10 further includes: the limiting piece 103 is arranged on one side in the locking piece mounting area 102, and the limiting piece 103 is positioned above the rotating shaft 101; for defining the rotation angle of the locking member 30. The limiting member 103 is used to limit the range of the rotation angle of the locking member 30, so that the end where the handle 3041 is located can rotate to the optimal state, which is convenient for the user to detach the filter screen 10 through the handle 3041, and improves the detachment efficiency.

For example, the limiting member 103 is a protrusion disposed in the locking member mounting region 102, and the protrusion length of the protrusion is greater than the gap between the locking member 30 and the locking member mounting region 102; then, the rotation angle of the locking member 30 is defined, referring to fig. 14, when the filter screen 30 is detached, the handle 3041 rotates the locking member 30, so that the limiting member 103 abuts against the surface of the body 301 away from the rotating shaft 101, thereby achieving the limiting function.

Preferably, the limiting member 103 is located right above the rotating shaft 101; at this time, on the premise that the rotation of the locking member 30 is not affected, the limiting effect of the limiting member 103 is optimal, and at the same time, the end where the handle part 3041 is located rotates to the optimal state, so that the user can hold the handle part 3041 to the maximum extent to detach the filter screen 10.

Further, as shown in fig. 5, a second engaging groove 104 is further disposed on one side of the locking member mounting region 102, and the second engaging groove 104 is disposed in cooperation with the connecting member 306. As shown in fig. 13, the locking member 30 is integrally fitted to the filter screen 10 by the connection member 306 being engaged with the second engaging groove 104.

Example 5:

as shown in fig. 6, the present embodiment further provides an air conditioner 100, which includes the filter screen mounting assembly 1 and the middle frame 20 in the above embodiments, wherein the filter screen mounting assembly 1 is detachably mounted on the middle frame 20.

Specifically, as shown in fig. 7, the upper end surface of the middle frame 20 is provided with an air inlet 202 and a buckling part, the buckling part is at least one cross beam 201, and the cross beam 201 partitions the air inlet 202 and partitions the air inlet 202 into a plurality of air inlet areas; as shown in fig. 8, 9 and 10, when the filter screen mounting assembly 1 is assembled, the locking block 3031 locks the side of the cross beam 201 close to the air inlet 202; the filter screen fastening end 3042 and the locking member fastening end 3043 are fastened to each other; so that the filter screen mounting assembly 1 is mounted at the air inlet 202 of the middle frame 20. The middle frame 20 is provided with at least one cross beam 201 and the locking end 303 to realize mutual locking, so that the whole structure is simple and the locking is convenient.

For example, the cross beam 201 can be arranged according to the position set by the locking end 303; if the vertical horizontal placement of the beam 201 is changed into the horizontal placement, the locking end 303 is disposed on the body 301 near one side of the beam 201.

Further, as shown in fig. 9, when the filter screen 10 is in the locked state, the top surface of the body 301 is flush with the top surface of the locking member mounting area 102 for hiding the locking member 30; the whole installation space is saved; as shown in fig. 10, when the filter screen 10 is in the unlocked state, the handle portion 3041 rotates with the locking member 30, and the handle portion 3041 is away from the locking member mounting area 102, so that the handle portion 3041 can be held to detach the filter screen 10.

Further, as shown in fig. 11, at least one middle frame engaging region 204 corresponding to the locking member mounting region 102 is provided with a engaging shaft 203, the engaging shaft 203 is disposed in the middle frame engaging region 204, and the engaging shaft 203 is disposed in cooperation with the locking block 3031. Specifically, as shown in fig. 12 and 13, during the assembling process, the groove-shaped curved portion of the locking block 3031 is hooked on the surface of the fastening shaft 203, and then the fastening end 3042 of the filter screen and the fastening end 3043 of the locking member are fastened to each other; the handle part 3041 is fastened to the middle frame 20 through a first fastening groove (not shown); so that the filter screen mounting assembly 1 is mounted at the air inlet 202 of the middle frame 20. By arranging the middle frame buckling area 204, the middle frame buckling area 204 is provided with the buckling shaft 203, the buckling shaft 203 is more stable when being locked with the locking end 303, and the buckling shaft 203 is prevented from being separated from the locking end 303 due to shaking generated in the using process of the air conditioner.

For example, the screen fastening end 3042 may be a groove or a projection, and the locking member fastening end 3043 may be a projection or a groove disposed to cooperate with the screen fastening end 3042.

Alternatively, the filter screen fastening end 3042 may be a protrusion, the inner surface of the locking member mounting region 102 is a flat surface, and the filter screen fastening end 3042 is in interference fit with the inner surface of the locking member mounting region 102.

Specifically, when the filter screen assembly 1 is installed, the handle part 3041 is pressed downwards to deform at least one of the filter screen fastening end 3042 and the inner surface of the locking member installation region 102, so that the filter screen fastening end 3042 and the inner surface of the locking member installation region 102 are in interference fit, and the locking block 3031 is locked with the retaining part in a retaining manner; a locking mounting of the filter screen 10 is achieved. Similarly, when the filter screen assembly 1 is disassembled, the handle part 3041 is pulled upwards by a pulling force, so that at least one of the filter screen fastening end 3042 and the inner surface of the locking member mounting region 102 is deformed, the filter screen fastening end 3042 is separated from the inner surface of the locking member mounting region 102, the locking block 3031 and the abutting part are unlocked, and the filter screen 10 is disassembled.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (12)

1. A filter screen mounting assembly comprising:

a filter screen (10) provided with at least one locking piece mounting area (102); its characterized in that, filter screen installation component (1) still includes:

at least one locking element (30) disposed within said locking element mounting area (102);

each of the locking pieces (30) includes: a locking part and a detaching part; when the locking piece (30) rotates, the locking or unlocking of the locking part is realized, so that the filter screen (10) is disassembled and assembled.

2. The filter screen mounting assembly according to claim 1, wherein the locking member (30) further comprises:

a body (301) having a lift end (304) and a lock end (303) disposed opposite each other; the lifting end (304) is the detaching part, and the locking end (303) is the locking part;

a rotating portion (302) provided on the body (301);

the locking piece mounting area (102) is internally provided with a rotating shaft (101), the rotating part (302) is rotatably connected with the rotating shaft (101), and when the locking piece (30) rotates, the locking end (303) can be switched between a locking state and an unlocking state.

3. The screen mounting assembly according to claim 2, wherein the locking end (303) extends downwardly and is bent or curved away from the rotary part (302).

4. The filter mounting assembly of claim 2, wherein the lift end (304) comprises:

a handle portion (3041) provided on both sides of the rotating portion (302) so as to face the locking end (303);

the filter screen buckling end (3042) is arranged on the side of the body (301).

5. The filter screen mounting assembly according to claim 4, wherein the handle portion (3041) is provided protruding from the body (301), and the handle portion (3041) and the rotating portion (302) are located on opposite sides of the body (301).

6. The filter screen mounting assembly according to claim 4, wherein the handle portion (3041) and the rotating portion (302) are located on the same side of the body (301), and the handle portion (3041) is connected to the body (301) by a connector.

7. The filter mounting assembly of claim 4,

when the filter screen (10) is in a locking state, the top surface of the body (301) is flush with the top surface of the locking piece mounting area (102) and is used for hiding the handle part (3041);

when the filter screen (10) is in an unlocked state, the handle part (3041) rotates along with the locking part (30), the handle part (3041) is far away from the locking part mounting area (102), and the handle part (3041) is convenient to hold to detach the filter screen (10).

8. A filter screen mounting assembly according to any of claims 4-7, wherein the filter screen (10) further comprises:

and the locking piece buckling end (3043) is arranged on one side in the locking piece mounting area (102) and is matched with the filter screen buckling end (3042).

9. The filter mounting assembly of claim 8, wherein the filter (10) further comprises:

the limiting piece (103) is arranged on one side in the locking piece mounting area (102), and the limiting piece (103) is positioned above the rotating shaft (101); for defining the rotation angle of the locking member (30).

10. An air conditioner, comprising:

a filter screen mounting assembly (1) according to any of claims 1 to 9;

the upper end face of the middle frame (20) is provided with a buckling part; when the filter screen mounting assembly is mounted on the middle frame (20), the abutting part and the locking part are locked.

11. The air conditioner according to claim 10, wherein the abutting portion is a cross beam, at least one cross beam (201) is provided, and when the filter screen mounting assembly (1) is assembled, the locking portion and the cross beam (201) are locked.

12. The air conditioner according to claim 10, wherein the middle frame (20) comprises:

at least one middle frame engagement region (204) disposed in correspondence with the locking member mounting region (102); the support buckling part is a buckling shaft (203), the buckling shaft (203) is arranged in the middle frame buckling area (204), and when the filter screen mounting assembly (1) is assembled, the buckling shaft (203) and the locking part are locked.

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