CN212417323U - Filter frame reaches filter assembly including it - Google Patents

Abstract

The application discloses filter frame and including its filter assembly, filter frame includes: the first frame, the second frame and a pair of connecting pieces, the second frame is respectively connected with a pair of sides of the first frame through the pair of connecting pieces, and the pair of connecting pieces block a butt joint formed between the second frame and the pair of sides of the first frame or prevent the butt joint from being formed between the second frame and the pair of sides of the first frame. When the filter assembly is installed, an operator can firstly only bond the bottom and the top of the filter to bond the filter with the first frame and then integrally bond the filter with the second frame until the first frame and the second frame are connected, and then glue is filled between the filter and the side part of the frame. The position of the filter relative to the filter frame is now fixed and the filter will not squeeze the glue any more, so that the glue will not escape from the butt joint.

Description

Filter frame reaches filter assembly including it

Technical Field

The present disclosure relates to the field of air treatment devices, and more particularly, to a filter frame and a filter assembly including the same.

Background

In an air treatment device, a filter assembly can be obtained by installing a filter into a filter frame. In some filter assemblies, the filter is mounted to the inside of the filter frame by a gluing process. The filter and the filter frame are bonded through the gluing process, so that gaps between the filter and the filter frame can be avoided, and the filter assembly can reach the expected filtering efficiency.

Since the glue has a certain fluidity, the glue easily overflows to the outer surface of the filter frame in the process of bonding the filter and the filter frame through the gluing process, affecting the appearance of the filter assembly.

SUMMERY OF THE UTILITY MODEL

The filter frame is generally comprised of at least a two-part frame. In mounting the filter to the filter frame, the operator first connects the filter to one of the frames and then integrally connects the frame and the filter to the other frame after the connection is completed. Since the glue has a certain fluidity, the glue inevitably overflows from the connection portion of the two frames onto the outer surface of the filter frame, affecting the appearance of the filter assembly.

At least one object of the present application is to provide a filter frame that prevents glue from spilling over the outer surface of the filter frame when the filter is installed.

To solve the above problems, the present application provides in a first aspect a filter frame comprising: a first frame including a bottom and a pair of sides disposed at opposite ends of the bottom; a second frame connected with the pair of sides of the first frame to form the filter frame; and a pair of connectors by which the second frame is connected to the pair of sides of the first frame, respectively, and which block or prevent a butt seam formed between the second frame and the pair of sides of the first frame.

According to the first aspect described above, the second frame includes a bottom portion and a pair of side portions provided at opposite ends of the bottom portion, the pair of side portions of the first frame and the pair of side portions of the second frame form a pair of the butt seams, wherein the pair of connecting members connect the pair of side portions of the first frame and the pair of side portions of the second frame overlapping the pair of butt seams to block the butt seams.

According to the first aspect described above, the filter frame forms the front side opening and the rear side opening which are opposed; wherein edges of the pair of connectors at the front and rear openings are bent toward an interior of the filter frame to form a bend such that the edges are away from the butt seam.

According to the first aspect described above, the bent portion is formed by bending the edges of the pair of connecting members twice toward the inside of the filter frame.

According to the first aspect described above, the first frame and the second frame are U-shaped.

According to the above first aspect, the first frame is U-shaped, the second frame includes a bottom, and the pair of side portions of the first frame and both ends of the bottom of the second frame are connected; wherein each of the pair of connectors includes a first flap formed at one of the pair of sides of the first frame and/or a second flap formed at one of the ends of the bottom of the second frame, the first flap overlapping the bottom of the second frame and the second flap overlapping the side of the first frame, the connector being configured such that the butt seam is not formed between the second frame and the pair of sides of the first frame.

According to the first aspect described above, the filter frame forms the front side opening and the rear side opening which are opposed; edges of the first frame and the second frame at the front side opening and the rear side opening are bent toward the inside of the filter frame to form blocking portions.

According to the first aspect described above, the pair of connecting members connect the pair of side portions of the first frame and the second frame by rivets.

According to the first aspect, the filter frame further comprises a sealing strip, the sealing strip is arranged on the inner surface of the filter frame, the sealing strip divides the inner surface of the filter frame into a gluing area and a non-gluing area, and the filter is mounted in the gluing area of the filter frame through a gluing process.

The present application provides, in a second aspect, a filter assembly comprising: a filter; and a filter frame as described above in relation to the first aspect; wherein the filter is mounted within the filter frame by a gluing process.

Drawings

FIG. 1A is a perspective view of one embodiment of a filter assembly according to the present application;

FIG. 1B is an exploded view of the filter frame of FIG. 1A;

FIG. 1C is a top view of the filter frame of FIG. 1A;

FIG. 1D is a cross-sectional view of the filter frame of FIG. 1C taken along line A-A;

FIG. 1E is a cross-sectional view of the filter frame of FIG. 1C taken along line B-B;

FIG. 2 is a perspective view of the connector of FIG. 1A;

FIG. 3 is a perspective view of a connector in yet another embodiment of a filter frame according to the present application;

FIG. 4A is a perspective view of yet another embodiment of a filter frame according to the present application;

FIG. 4B is an exploded view of the filter frame of FIG. 4A;

FIG. 5 is a perspective view of a second frame in yet another embodiment of a filter frame according to the present application;

FIG. 6 is a perspective view of a first frame in yet another embodiment of a filter frame according to the present application;

FIG. 7A is a perspective view of yet another embodiment of a filter frame according to the present application;

FIG. 7B is an exploded view of the filter frame of FIG. 7A;

FIG. 8 is an exploded view of yet another embodiment of a filter frame according to the present application;

FIG. 9 is an exploded view of yet another embodiment of a filter frame according to the present application;

FIG. 10A is a perspective view of yet another embodiment of a filter frame according to the present application;

fig. 10B is an exploded view of the filter frame of fig. 10A.

Detailed Description

Various embodiments of the present application will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that although directional terms, such as "front," "rear," "upper," "lower," "left," "right," "top," "bottom," and the like may be used herein to describe various example structural portions and elements of the application, these terms are used herein for convenience of description only and are to be determined based on the example orientations shown in the figures. Because the embodiments disclosed herein can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and are not to be construed as limiting.

Fig. 1A is a perspective view illustrating a structure of an embodiment of a filter assembly according to the present application, and fig. 1B to 1E illustrate a detailed structure of an embodiment of a filter frame of fig. 1A, in which a dotted line frame shows a partially enlarged view. As shown in fig. 1A, the filter assembly 110 has a length direction L, a width direction W, and a height direction H. The filter assembly 110 includes a filter 101 and a filter frame 100, and the filter 101 is bonded in the filter frame 100 by a gluing process. When the air flows through the filter 101 from top to bottom or from bottom to top substantially in the height direction H, the filter 101 can perform a function of purifying the air.

The filter 101 is substantially a rectangular parallelepiped shape having a certain height, and the filter frame 100 is substantially a box shape to fit the filter 101. The inner surfaces 104 of the respective borders of the filter frame 100 are spaced apart by a distance substantially equal to the length and width of the filter 101 in the length direction L and the width direction W, such that there is no gap between the filter 101 and the respective borders of the filter frame 100 when the filter 101 is bonded in the filter frame 100. When air flows through the filter 101, no air flows through these gaps without passing through the filter 101. And the height of the filter frame 100 is greater than the height of the filter 101 in the height direction H.

As shown in fig. 1A-1B, the filter frame 100 includes a first frame 105 and a second frame 106. The first frame 105 and the second frame 106 are each U-shaped and are connected to each other by a pair of connecting members 103 to form the filter frame 100. In the example shown in the drawing, the first frame 105 includes a bottom portion 111 and a pair of side portions 112, 113, and the pair of side portions 112, 113 are substantially symmetrically disposed at opposite ends in a length direction L of the bottom portion 111 and extend perpendicular to the bottom portion 111 in a width direction W from both ends of the bottom portion 111. Likewise, the second frame 106 also includes a bottom portion 121 and a pair of side portions 122, 123, the pair of side portions 122, 123 being disposed substantially symmetrically at opposite ends in the length direction L of the bottom portion 121 and extending from both ends of the bottom portion 121 in the width direction W perpendicularly to the bottom portion 121. The bottom 111 of the first frame 105 forms the bottom border of the filter frame 100, the bottom 121 of the second frame 106 forms the top border of the filter frame 100, and the pair of sides 112, 113 of the first frame 105 and the pair of sides 122, 123 of the second frame are connected to each other to form the two side borders of the filter frame 100 substantially symmetrically. The specific structure of the side frame of the filter frame 100 will be described below with reference to the structure of the side portion 112 of the first frame 105 and the side portion 122 of the second frame 106.

As shown in fig. 1A-1B, the side 112 of the first frame 105 and the side 122 of the second frame 106 abut each other at respective top edges to form a butt seam 108 at the abutment. In the present embodiment, the first frame 105 and the second frame 106 have a symmetrical shape, and the butt seam 108 is formed in the middle of the side frame of the filter frame 100 and extends substantially in the height direction H. One of the pair of connectors 103 has an upper portion connected to the side portion 112 by a rivet and a lower portion connected to the side portion 122 by a rivet to connect the side portion 112 and the side portion 122 together by the connector 103 and to block the butt seam 108.

In the present embodiment, the first frame 105 and the second frame 106 are formed by bending and integrating a sheet metal, so that there is no seam that may cause glue overflow in the frames of the first frame 105 and the second frame 106. The butt seam 108 formed by the joining of the side 112 of the first frame 105 and the side 122 of the second frame 106 connects the inner surface 104 and the outer surface 109 of the filter frame 100, so that glue may spill over the butt seam 108 onto the outer surface 109 of the filter frame 100, affecting the appearance of the filter assembly. And the connection member 103 is overlappingly connected to the butt seam 108, severing the connection between the inner surface 104 and the outer surface 109 of the filter frame 100 at the butt seam 108. In this embodiment, the connector 103 is attached to the inner surface 104 of the filter frame 100 at the butt seam 108 to cut off the communication between the inner surface 104 of the filter frame 100 and the butt seam 108. In some embodiments, the connector 103 can also be attached to the outer surface 109 of the filter frame 100 at the butt seam 108 to cut off communication between the outer surface 109 of the filter frame 100 and the butt seam 108.

In the same manner as the side portion 112 and the side portion 122 are connected, the side portion 113 of the first frame 105 and the side portion 123 of the second frame 106 are also abutted against each other to form the butt seam 108, and the other connector 103 of the pair of connectors 103 overlappingly blocks the butt seam 108 and connects the side portion 113 and the side portion 123 together.

Thus, the respective sides of the first frame 105 and the second frame 106 can be connected together by a pair of connectors 103 to form a filter frame 100 of a generally block shape. And the connector 103 can block the butt seam 108 created when the first frame 105 and the second frame 106 are connected to block glue on the inner surface 104 of the filter frame 100 from spilling onto the outer surface 109.

As will be seen from fig. 1B in conjunction with fig. 1C to 1E, the filter frame 100 is formed with a front-side opening 131 and a rear-side opening 132 in the height direction H for air to flow in or out, and respective sides of the filter 101 are bonded to the inner surface 104 of the filter frame 100 between the front-side opening 131 and the rear-side opening 132.

An edge of each of the pair of connection members 103 at the front-side opening 131 and the rear-side opening 132 is bent toward the inside of the filter frame 100 to form a bent portion 133. As one example, the bent portion 133 is formed by bending an edge of the connection member 103 twice. The first bending is formed by extending the edge of the connecting member 103 in a plane direction substantially parallel to the length direction L and the width direction W, and the second bending is formed by extending the edge formed by the first bending in the height direction H. In some embodiments, the bending part 133 may also be formed by bending the edge of the connection member 103 once. As long as the edge 165 of the connector 103 can be moved away from the butt seam 108 by bending the edge of the connector 103. Even if glue on the inner surface 104 of the filter frame 100 flows outwards, it does not flow past the edges of the connection piece 103 and the butt seam 108 and spill onto the outer surface 109 of the filter frame 100.

Thereby, the connector 103 can remain overlapping the respective butt seam 108 to block the butt seam 108, but the edge of the connector 103 can be distanced from the respective butt seam 108, thereby preventing glue on the inner surface 104 of the filter frame 100 from spilling over the butt seam 108 and the edge of the connector 103 onto the outer surface 109 of the filter frame 100.

Edges of the filter frame 100 at the front side opening 131 and the rear side opening 132 are bent toward the inside of the filter frame 100 to form the stoppers 118. As an example, the blocking portion 118 is bent in the same manner as the connecting member 103, and is also formed by bending the edge of the filter frame 100 twice. In this embodiment, the stopper 118 includes a first frame stopper 115 and a second frame stopper 125, the first frame stopper 115 is formed by bending front and rear side edges of the first frame 105, and the second frame stopper 125 is formed by bending front and rear side edges of the second frame 106. The bent portion 133 of the connection member 103 is overlappingly disposed inside the first and second frame stoppers 115 and 125 at the respective sides. The stoppers 118 are integrally provided at the front and rear side edges of the filter frame 100, and can play a certain role of stopping the glue on the inner surface 104 of the filter frame 100, thereby preventing the glue from overflowing from the front and rear side edges of the filter frame 100.

In the embodiment shown in fig. 1B, the filter frame 100 further comprises a sealing strip 138, the sealing strip 138 being disposed on the inner surface 104 of the filter frame 100 to divide the inner surface 104 of the filter frame 100 into a glue area 135 and a non-glue area 136, the filter 101 being bonded in the glue area 135 by a gluing process. As an example, the sealing strip 138 can have a thickness to block the glue within the glue application area 135, limiting the flow of glue, thereby better preventing the glue from spilling out.

In the process of bonding the filter 101 into the filter frame 100, the operator first applies glue to the glue area 135 of the inner surface 104 of the bottom 111 of the first frame 105, then pre-loads the filter 101 in the first frame 105, and bonds the bottom of the filter 101 and the bottom 111 of the first frame 105 together. Since the first frame 105 has a symmetrical U-shape, the filter 101 is not easily poured toward the side 112 or the side 113, and can be stably held in the first frame 105 even if glue is not applied to the inner surfaces 104 of the side 112 and the side 113.

The operator then applies glue to the glue area 135 of the inner surface 104 of the bottom part 121 of the second frame 106 and rivets the pair of connectors 103 to the top of the pair of sides 112, 113 of the first frame 105 or to the top of the pair of sides 122, 123 of the second frame 106 by means of rivets. After the glue between the filter 101 and the bottom 111 of the first frame 105 has cured (i.e. no longer flows), the filter 101 and the first frame 105 as a whole are bonded to the second frame 106, so that the bottom 121 of the second frame 106 is bonded to the top of the filter 101. And a pair of connectors 103 is riveted to the other pair of sides so that the first frame 105 and the second frame 106 are connected together.

Finally, the operator injects water between the filter 101 and the sides of the first frame 105 and the second frame 106, so that the filter 101 is adhered to the sides of the first frame 105 and the second frame 106.

The applicant has found, through long-term observation and study, that during the process of bonding the filter, when glue on the inner surface of the filter frame is squeezed by the filter or other parts of the filter frame, it will be particularly easy to flow through the seams in the filter frame to the outer surface of the filter frame, affecting the appearance of the filter assembly. The filter frame of the present embodiment includes the U-shaped first frame, and even if the side of the first frame is not filled with glue first, the stability of the filter in the filter frame is not affected. Therefore, only the bottom and the top of the filter can be bonded first until the first frame and the second frame are connected, and then glue is filled between the filter and the side part of the frame. The position of the filter relative to the filter frame is now fixed and the filter will not squeeze the glue any more, so that the glue will not escape from the butt joint.

It will be appreciated by those skilled in the art that to facilitate pre-installation of the filter 101 in the first frame 105, the side portions 112 and 113 of the first frame 105 may also be filled with a glue in the areas near the bottom. At this point, the first frame 105 may be placed upright when pre-loading the filter 101, with the glue flowing under the force of gravity along the inner surfaces 104 of the sides 112 and 113 towards the bottom 111. Thus, the glue does not overflow from the top of the respective side portion either.

Fig. 2 shows a specific structure of the connection member 103 in fig. 1A. As shown in fig. 2, the connecting member 103 includes a plate 241 and a pair of bent portions 133, and the pair of bent portions 133 are respectively disposed at front and rear side edges of the plate 241. As described above, the bent portion 133 is formed by bending the edge of the connector 103 twice in the front direction of the plate 241.

Specifically, each of the bent portions 133 includes a primary bent portion 261 and a secondary bent portion 262, the primary bent portion 261 is perpendicular to the plate 241, and the secondary bent portion 262 is parallel to the plate 241. The edge 165 of the connector 103 is located at the edge of the secondary bent portion 262 and is spaced apart from the plate 241 by the primary bent portion 261. Each of the bent portions 133 can generally form a U-shaped channel with the panel 241 to accommodate a certain amount of glue to prevent the glue from spilling over to the butt seam 108 on the back of the panel 241.

Further, two rows of staking holes 264 are provided on the plate 241, with one row of staking holes 264 for staking with the side of the first frame 105 and the other row of staking holes 264 for staking with the side of the second frame 106 to provide the butt joint 108 formed by the respective sides in overlapping relation to the back of the plate 241 and to enable the edge 165 to be spaced away from the butt joint 108 on the back of the connector 103 (see fig. 1A).

The structure of the connection member 303 in another embodiment of the filter frame is shown in fig. 3. As shown in fig. 3, the connecting member 303 has a structure similar to that of the connecting member 103 shown in fig. 2, and also includes a plate 241 and a pair of bent portions 333, and the pair of bent portions 333 are provided at both front and rear side edges of the plate 241. The difference is that each bent portion 333 is formed by bending the edge of the connecting member 303 once toward the front direction of the plate 241. In the embodiment, the bent portion 333 includes only the first bent portion 361, and the edge 365 of the connecting member 303 is located at the edge of the first bent portion 361, and the first bent portion 361 is spaced apart from the plate 241. The back of panel 241 occludes the butt seam in overlapping relation and edge 365 is distal from the butt seam. It is thereby possible to enable each fold 333 to block the overflow of glue to the butt seam of the back of the panel 241 by the primary fold 361.

Fig. 4A and 4B show a detailed structure of still another embodiment of the filter frame of the present application, in which fig. 4A is a perspective view and fig. 4B is an exploded view of the filter frame of fig. 4A in a state where it is vertically placed. As shown in fig. 4A and 4B, similar to the filter frame 100, the filter frame 400 also includes a first frame 405 and a second frame 406, which are connected together by a connector. However, in this embodiment, the first frame 405 is a U-shaped frame and the second frame 406 is a straight frame. And the connection member is directly formed by folding the first frame 405 and the second frame 406.

Specifically, the first frame 405 includes a bottom 411 and a pair of sides 412, 413, and the second frame 406 includes a bottom 421. The pair of side portions 412, 413 are disposed substantially symmetrically at opposite ends of the bottom portion 411 in the longitudinal direction L, and extend upward from the both ends of the bottom portion 411 perpendicularly to the bottom portion 411. The pair of side portions 412 and 413 of the first frame 405 are connected to both ends of the bottom 421 of the second frame 406, respectively. In the present embodiment, a first flap 453 is formed by folding from a top edge of each side of the first frame 405 to the opposite side in the L direction, and the first flap 453 can overlap and be riveted to the bottom 421 of the second frame 406. And a second flap 455 is folded perpendicularly to the bottom 421 in the W direction from a side edge of each end of the bottom 421 of the second frame 406, the second flap 455 being capable of overlapping and being riveted to the corresponding side portions 412, 413 of the first frame 405. In this embodiment, the first frame 405 and the second frame 406 are riveted together by flanging without forming a butt joint. The glue on the inner surface 404 of the filter frame 400 cannot escape through the butt seam onto the outer surface 409.

Similar to the filter frame 100, the filter frame 400 also has opposite front and rear openings 431 and 432, and a blocking portion 418 is bent toward the inside of the filter frame 400 at the edges of the filter frame 400 at the front and rear openings 431 and 432. In this embodiment, the blocking portion 418 is also formed by bending the edge of the filter frame 400 twice, and includes a first frame blocking portion 415 formed by bending the front and rear side edges of the first frame 405 and a second frame blocking portion 425 formed by bending the front and rear side edges of the second frame 406. The blocking portion 418 can provide a certain blocking effect for the glue on the inner surface 404 of the filter frame 400, preventing the glue from overflowing from the front and rear side edges of the filter frame 400. In this embodiment, the edges of the first and second turned edges 453, 455 at the front and rear openings 431, 432 are tightly connected or integrally formed with the respective stops 418 to further prevent glue on the inner surface 404 of the filter frame 400 from spilling out of the gap onto the outer surface 409.

In this embodiment, the first frame 405 is still U-shaped, which mounts a filter (not shown) into the filter frame 400 in a manner similar to the filter frame 100. That is, the operator can hold the filter in the first frame 405 without applying glue to the inner surface 404 of the bottom 411 and the inner surfaces 404 of the pair of sides 412, 413 of the first frame 405 when adhering the filter to the first frame 405. Thus, the filter frame 400 may also prevent flash when the filter is bonded into the frame.

Fig. 5 shows the structure of a second frame in still another embodiment of the filter frame of the present application. The filter frame in this embodiment also includes a first frame having a structure as shown in fig. 4A and 4B, and a second frame having a structure as shown in fig. 5. As shown in fig. 5, the second frame 506 includes a bottom 521, and front and rear side edges of the bottom 521 are bent twice to form a second frame stopper 525. In the present embodiment, the second frame 506 is different from the second frame 406 of the filter frame 400 in that both ends of the bottom 521 are not formed with the second flanging. The first frame 405 and the second frame 506 are riveted together only by the first turnover edge 453 of the first frame 405.

In this embodiment, the first frame 405 is still a U-shaped frame, and no butt joint is still formed between the first frame 405 and the second frame 506, so the filter frame can also prevent glue overflow.

Fig. 6 shows the structure of the first frame in still another embodiment of the filter frame of the present application. The filter frame in this embodiment also includes a first frame having a structure as shown in fig. 6 and a second frame having a structure as shown in fig. 4A and 4B. As shown in fig. 6, the first frame 605 includes a bottom portion 611 and two opposite side portions 612 and 613, and front and rear side edges of the bottom portion 611 and the side portions 612 and 613 are bent twice to form a first frame stopper 615. In this embodiment, the first frame 605 differs from the first frame 405 in the filter frame 400 in that the top end of each side 612, 613 does not form a first flanging edge. The first frame 605 and the second frame 406 are riveted together only by the second flap 455 on the second frame 406.

Also, in embodiments, the first frame 605 is still a U-shaped frame, and no butt joint is still formed between the first frame 605 and the second frame 406, so the filter frame may also prevent flash.

In the above embodiments, the filter frame is composed of a first frame and a second frame, wherein the first frame is a U-shaped frame, and the second frame may be a U-shaped frame or a straight frame. Even if the operator does not pour glue into the side portion of the first frame, the stability of the filter in the filter frame is not affected. Therefore, only the bottom and the top of the filter can be bonded first until the first frame and the second frame are connected, and then glue is filled between the filter and the side part of the frame. The position of the filter relative to the filter frame is now fixed and the filter will not squeeze the glue any more, so that the glue will not escape from the butt joint. Also, in the above embodiments, the butt seam between the first frame and the second frame can be not formed, or even if the butt seam is formed, the butt seam can be blocked by the connector, thereby further preventing the glue from overflowing through the butt seam.

Fig. 7A and 7B show a detailed structure of still another embodiment of the filter frame of the present application, in which fig. 7A is a perspective view, and fig. 7B is an exploded view of the filter frame of fig. 7A in a state where it is vertically placed. As shown in fig. 7A and 7B, the filter frame 700 includes a first frame 705 and a second frame 706, and both are connected together by a connection member. In this embodiment, the first frame 705 and the second frame 706 are substantially L-shaped, and the connecting member is formed by folding the first frame 705 and the second frame 706.

Specifically, the first frame 705 includes a bottom portion 711 and a side portion 712, and the second frame 706 includes a bottom portion 721 and a side portion 723 disposed opposite to the side portion 712. One end in the longitudinal direction L of the bottom 711 of the first frame 705 is provided with a side 712, and the other end is connected to a side 723 of the second frame 706. Similarly, one end of the bottom 721 of the second frame 706 in the length direction L is provided with a side 723, and the other end is connected to the side 712 of the first frame 705. In this embodiment, a third folding edge 745 is formed by folding from each top edge of the side portion 712 of the first frame 705 and the side portion 723 of the second frame 706 to the other side portion in the L direction, and the third folding edge 745 can be overlapped with the corresponding bottom portion and riveted together. And the other ends of the bottoms of the first frame 705 and the second frame 706 are folded to form fourth flaps 743, and the fourth flaps 743 are used for overlapping with the corresponding sides and riveting together. Thus, in this embodiment, the first frame 705 and the second frame 706 also do not form a butt seam. The glue on the inner surface of the filter frame 700 cannot escape through the butt seam onto the outer surface.

Also, in the present embodiment, the fourth flap 743 of the bottom of each frame is also formed to extend perpendicularly to the bottom from one end of the bottom, and it can be considered that both ends of the bottom are provided with a pair of side portions having different lengths. When the operator adheres the filter to the first frame 705, the operator first applies only glue to the bottom 711, and after the adhesion is completed, the first frame 705 and the filter are integrally connected to the second frame 706. When glue is applied to the bottom 711 and the bottom 721, a certain distance may be left between the glue-applied region and a side near the fourth flap 743 to prevent the glue from overflowing when the fourth flap 743 is riveted to the corresponding side.

Fig. 8 shows a specific structure of still another embodiment of the filter frame of the present application. As shown in fig. 8, the filter frame 800 includes a first frame 805 and a second frame 806. Similar to filter frame 700, first frame 805 and second frame 806 are also L-shaped frames, first frame 805 including a bottom 811 and a side 812, and second frame 806 including a bottom 821 and a side 823. The side portion 812 is provided at one end of the bottom portion 811 in the longitudinal direction L, and the other end of the bottom portion 811 in the longitudinal direction L is connected to the side portion 823 of the second frame 806. Unlike the filter frame 700, only the top edges of the sides of the first frame 805 and the second frame 806 are folded over to form third flaps 845, and the third flaps 845 are adapted to overlap the respective bottoms and be riveted together. While the ends of their bottoms do not form the flanging. In this embodiment, the first frame 805 and the second frame 806 do not form a butt joint, and thus glue on the inner surface of the filter frame 800 cannot overflow to the outer surface through the butt joint. And when the operator coats the glue on the bottom, the glue can be prevented from overflowing better by avoiding the end of the bottom, which does not form the side part.

Fig. 9 shows a specific structure of still another embodiment of the filter frame of the present application. As shown in fig. 9, the filter frame 900 includes a first frame 905 and a second frame 906. Similar to the filter frame 700, the first frame 905 and the second frame 906 are also L-shaped frames, the first frame 905 includes a bottom portion 911 and a side portion 912, and the second frame 906 includes a bottom portion 921 and a side portion 923. The side portion 912 is disposed at one end of the bottom portion 911 in the longitudinal direction L, and the other end of the bottom portion 911 in the longitudinal direction L is connected to the side portion 923 of the second frame 906. Unlike the filter frame 700, only the top edge of the side portion 923 of the second frame 906 is turned over to form a third turned-over edge 945 for overlapping and riveting with the bottom portion 911 of the first frame 905, and the other end of the bottom portion 921 is turned over to form a fourth turned-over edge 943 for overlapping and riveting with the side portion 912 of the first frame 905, while the first frame 905 is not formed into a turned-over edge. In this embodiment, the first frame 905 and the second frame 906 do not form a butt joint, so that the glue on the inner surface of the filter frame 900 cannot overflow to the outer surface through the butt joint. And when the operator coats the glue on the bottom, the glue can be prevented from overflowing better by avoiding the end of the bottom, which does not form the side part.

Fig. 10A and 10B show a detailed structure of still another embodiment of the filter frame of the present application, in which fig. 10A is a perspective view, and fig. 10B is an exploded view of the filter frame of fig. 10A in a state where it is vertically placed. As shown in fig. 10A and 10B, the filter frame 1000 includes a first frame 1005 and a second frame 1006. Similar to filter frame 700, first frame 1005 and second frame 1006 are also L-shaped frames, first frame 1005 including a bottom 1011 and sides 1012, and second frame 1006 including a bottom 1021 and sides 1023. Unlike the filter frame 700, the attachment in this embodiment includes a separate pair of attachments 1061, each attachment 1061 for attaching the first frame 1005 and the second frame 1006 together at a corner of the filter frame 1000. In this embodiment, the top edge of the side portion 1012 of the first frame 1005 and the side edge of the bottom portion 1021 of the second frame 1006 abut each other to form a butt seam 1008 at the abutment. The top edge of the side 1023 of the second frame 1006 and the side edge of the bottom 1011 of the first frame 1005 abut each other to form another butt seam 1008 at the abutment. Each connector 1061 comprises two portions at substantially right angles, one of which overlaps and is riveted to the side of the respective frame and the other of which overlaps and is riveted to the bottom of the respective frame, so as to connect the two frames together by the connector 1061 and block the corresponding butt seam 1008.

In the present embodiment, the edges of the front and rear sides of each connecting piece 1061 are bent twice to form the bent portions 1033, and the edges of the connecting pieces 1061 can be separated from the butt seams 1008 by providing the bent portions 1033. Even if the glue on the inner surface of the filter frame 1000 flows outward, it does not flow over the edges of the connecting pieces 1061 and the butt seams 1008 and spill onto the outer surface of the filter frame 1000. And when the operator coats the glue on the bottom, the glue can be prevented from overflowing better by avoiding the end of the bottom, which does not form the side part.

In other embodiments than the filter frame 100, although not shown in the figures, a sealing strip 138 may be provided on the inner surface of the filter frame, as with the filter frame 100, to further prevent glue from escaping.

In this application, the filter frame comprises first frame and second frame, and the operating personnel can bond filter and first frame earlier when installing the filter subassembly, and then wholly bond with the second frame. In some embodiments, a butt seam is formed between the first frame and the second frame, the first frame and the second frame are connected together by a connector that blocks the butt seam, and glue is prevented from spilling through the butt seam. In some embodiments, no butt joint is formed between the first frame and the second frame to avoid glue from overflowing through the butt joint, and the connector formed by the flanging overlaps and is riveted with the first frame and/or the second frame to form the filter frame. And in some embodiments, the first frame may be a U-shaped frame to increase stability when the filter is bonded to the first frame. Even if the operator does not pour glue into the side portion of the first frame, the stability of the filter in the filter frame is not affected. Therefore, only the bottom and the top of the filter can be bonded first until the first frame and the second frame are connected, and then glue is filled between the filter and the side part of the frame. The position of the filter relative to the filter frame is now fixed and the filter will not squeeze the glue any more, so that the glue will not escape from the butt joint.

Although the present application will be described with reference to the particular embodiments shown in the drawings, it should be understood that many variations of the filter frame and filter assembly of the present application are possible without departing from the spirit and scope of the teachings of the present application. Those of ordinary skill in the art will also realize that there are different ways of varying the details of the structures in the embodiments disclosed in this application that fall within the spirit and scope of the application and the claims.

Claims (10)

1. A filter frame, characterized by: the filter frame includes:

a first frame including a bottom and a pair of sides disposed at opposite ends of the bottom;

a second frame connected with the pair of sides of the first frame to form the filter frame; and

a pair of connectors by which the second frame is connected to the pair of sides of the first frame, respectively, and which block or prevent a butt seam formed between the second frame and the pair of sides of the first frame.

2. The filter frame of claim 1, wherein:

the second frame includes a bottom and a pair of sides disposed at opposite ends of the bottom, the pair of sides of the first frame and the pair of sides of the second frame forming a pair of the butt seams, wherein the pair of connectors connect the pair of sides of the first frame and the pair of sides of the second frame overlapping the pair of butt seams to block the butt seams.

3. The filter frame of claim 2, wherein:

the filter frame defining opposing front and rear openings;

wherein edges of the pair of connectors at the front and rear openings are bent toward an interior of the filter frame to form a bend such that the edges are away from the butt seam.

4. The filter frame of claim 3, wherein:

the bent portion is formed by bending the edges of the pair of connection members twice toward the inside of the filter frame.

5. The filter frame of claim 4, wherein:

the first frame and the second frame are U-shaped.

6. The filter frame of claim 1, wherein:

the first frame is U-shaped, the second frame includes a bottom, and the pair of side portions of the first frame are connected to both ends of the bottom of the second frame;

wherein each of the pair of connectors includes a first flap formed at one of the pair of sides of the first frame and/or a second flap formed at one of the ends of the bottom of the second frame, the first flap overlapping the bottom of the second frame and the second flap overlapping the side of the first frame, the connector being configured such that the butt seam is not formed between the second frame and the pair of sides of the first frame.

7. The filter frame of claim 1, wherein:

the filter frame defining opposing front and rear openings;

edges of the first frame and the second frame at the front side opening and the rear side opening are bent toward the inside of the filter frame to form blocking portions.

8. The filter frame of claim 1, wherein:

the pair of connecting members connect the pair of side portions of the first frame and the second frame by rivets.

9. The filter frame of claim 1, wherein:

the filter frame still includes the sealing strip, the sealing strip sets up on the internal surface of filter frame, the sealing strip will the internal surface of filter frame is divided into and is glued regional and not glue the region, wherein the filter is installed through sticky technology the filter frame glue in the region.

10. A filter assembly, characterized by: the filter assembly includes:

a filter; and

a filter frame as claimed in any one of claims 1 to 9;

wherein the filter is mounted within the filter frame by a gluing process.

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