TWI670110B - Filter unit - Google Patents

Abstract

A filter unit includes a frame set and a filter cloth set. The frame set includes a wraparound surround plate that is circumferentially disposed and vertically horizontal. The filter cloth set includes a back sheet located under the standing surrounding board, an outer piece extending upward from the outer periphery of the back sheet and located outside the standing surrounding board, at least one extending upward from the back sheet and located at the bottom An inner vertical piece surrounding the inner side of the inner panel, at least one zipper member disposed between the inner vertical piece and the outer vertical piece, and a plurality of filter tubes disposed on the inner layer. The backsheet has a plurality of perforations. Each filter tube has a tube portion connected to the bottom sheet and surrounding the respective perforations, and a top portion connecting the tube portions. The outer layer of the outer layer, the inner layer of the upright piece and the zipper member can be easily replaced, and the same quality can be maintained with each replacement.

Description

Filter unit

The present invention relates to a filtering device, and more particularly to a filtering unit for an exhaust fan.

Referring to Fig. 1, a conventional filtering device for a granulator includes a two annular planar frame 11, and two filter cloth sets 12 respectively mounted to the annular planar frame 11, each filter cloth set 12 There is a base portion 121 located at the bottom of the respective annular planar frame 11 , a surrounding portion 122 extending upward from the outer peripheral edge of the base portion 121 and located outside the annular planar frame 11 , and a pull cord 123 disposed on the surrounding portion 122 . And a plurality of pockets 124 that connect the base 121 and extend upward.

In use, each filter cloth set 12 is disposed under the respective annular planar frame 11 and surrounds the outer side of the annular planar frame 11 with the respective surrounding portions 122 upwardly, and the annular planar frame 11 is covered inwardly. And tightening the respective drawstrings 123 so that the annular planar frame 11 is covered and fixed, and then the airflow is directed upwardly through the pockets 124 by a drafting device located above the annular planar frames 11 Can make The powder that cannot pass through the pockets 124 is combined into pellets in the pockets for subsequent use.

The filter cloth set 12 will be blocked after multiple uses and needs to be replaced. When installing, each pull cord 123 must be manually tightened and fixed. In order to avoid loosening, the force of each person when tightening will be Inconsistent, the tension applied to the filter cloth group 12 is not fixed, so the filtering effect is also inconsistent, so that the quality of the produced product is unstable.

Accordingly, it is an object of the present invention to provide a filter unit that overcomes at least one of the disadvantages described in the prior art.

Thus, the filter unit of the present invention is used for a blower capable of guiding a gas flow, the filter unit comprising a frame group, and a filter cloth set.

The frame set includes a standing surrounding plate disposed under the exhaust fan in an up and down direction and circumferentially disposed along a horizontal plane perpendicular to the up and down direction and perpendicular to the horizontal plane. The filter cloth set includes a back sheet located under the standing surrounding board, an outer piece extending upward from the outer periphery of the back sheet and located outside the standing surrounding board, at least one extending upward from the back sheet and located at the bottom An inner vertical piece that surrounds the inner side of the surrounding plate, at least one zipper member disposed between the inner vertical piece and the outer vertical piece and co-wrapping the standing surrounding plate with the inner vertical piece and the outer vertical piece, and plural a filter tube disposed on the bottom sheet and guided by the exhaust fan to guide the airflow. The bottom layer The sheet has a plurality of perforations disposed at intervals and extending in the up and down direction, each filter tube having a tube portion connecting the back sheet and surrounding the respective perforations, and a top portion connecting one side of the tube portion opposite the back sheet.

The effect of the invention is that the filter cloth set can be easily replaced by the arrangement of the outer layer upright piece, the inner layer upright piece and the zipper piece, and the same quality can be maintained for each replacement.

2‧‧‧Framework

21‧‧‧Standing surround board

211‧‧‧Isolated segment

22‧‧‧Isolation board

221‧‧‧ first end

222‧‧‧ second end

23‧‧‧Isolated space

3‧‧‧Filter cloth set

311‧‧‧Perforation

32‧‧‧Outer erect tablets

33‧‧‧Inner erect film

34‧‧‧ zipper pieces

35‧‧‧ filter tube

351‧‧‧ Department of Tube

352‧‧‧ top

S‧‧‧ water level

31‧‧‧The bottom film

Z‧‧‧Up and down direction

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a perspective view of a conventional filter device; FIG. 2 is a view of an embodiment of the filter unit of the present invention. 3 is an exploded perspective view of the embodiment; and FIG. 4 is a view showing a state of use of the embodiment.

Referring to Figures 2, 3 and 4, an embodiment of the filter unit of the present invention is used for a drafter (not shown) that directs airflow. The filter unit comprises a frame set 2 and a filter cloth set 3.

The frame group 2 includes a slanting surround that is located below the exhaust fan in an up and down direction and is located upstream of the airflow guided by the exhaust fan and is disposed around a horizontal plane S perpendicular to the up and down direction Z and perpendicular to the horizontal plane S. The plates 21, and two are connected to the standing surrounding board 21 to divide the area surrounded by the standing surrounding board 21 into the partitioning plates 22 of the three isolated spaces 23.

Therefore, the standing surrounding plate 21 has three isolated segments 211 separated by the isolating plates 22. Each of the spacers 22 has an opposite first end 221 and a second end 222. Also, the first ends 221 of the spacers 22 are adjacent to each other.

In the present embodiment, the outline of the standing surrounding plate 21 is fan-shaped, and the first end 221 of the separating plate 22 is connected to the center of the sector. The second ends 222 of the spacers 22 are connected to the arcuate edges of the sectors such that each of the isolation spaces 23 is fanned.

The filter cloth set 3 includes a bottom sheet 31 located below the standing surrounding panel 21, an outer gusset 32 extending upward from the outer periphery of the back sheet 31 and located outside the standing surrounding board 21, and three outer sheets 31 linings 33 extending upwardly and respectively located inside the partitions 211, three erected sheets disposed between the inner slabs 33 and the outer slabs 32 and the inner slabs 33 and the outer layer The upright piece 32 collectively covers the zipper member 34 of the isolating section 22, and a plurality of filter tubes 35 disposed on the backsheet 31 and guided by the exhaust fan to guide the airflow.

The bottom sheet 31 has a plurality of perforations 311 disposed at intervals and extending in the up and down direction Z. Each of the filter tubes 35 has a connection between the bottom sheets 31 and the respective ones. The tube portion 351 of the hole, and a top portion 352 that connects the tube portion 351 opposite to the side of the back sheet 31.

It should be noted that the spacers 22 are used to enhance the structural strength of the standing surrounding board 21. However, if the standing surrounding board 21 is substantially circular, the spacers 22 are not required to be reinforced, so The isolated space 23 is created, and the number of the inner upright sheets 33 and the zipper members 34 is also reduced to one.

In the present embodiment, the filter unit and the blower are used in a granulator or a coater for granulating the powder to form granules.

When assembled, the filter cloth set 3 is loaded into the frame group 2 upward in the up-and-down direction Z, so that the isolating segments 211 of the standing surrounding plate 21 are coated on the outer layer upright sheets 32 and the inner layers are upright. After the zipper members 34 are pulled together, the assembly of the filter cloth set 3 and the frame group 2 can be completed.

Then, the blower is driven to generate an upward directed airflow, so that the powder and air are sucked into the filter tubes 35 through the through holes 311, and the air and the powder are filtered to leave the powder in the filter tubes 35. After repeated impacts, it is granulated.

When the filter tubes 35 are blocked for a period of use and the filter cloth set 3 needs to be replaced, the filter cloth set 3 can be quickly replaced by pulling the zipper members 34 apart.

Since the zipper members 34 are combined with the outer gussets 32 and the inner slabs 33, the frame group 2 can be covered to ensure that the filter cloth group 3 does not The frame group 2 is disengaged, and the backing piece 31 maintains a fixed tension after each replacement. Compared with the prior art filtering device, the quality of the cable may be affected by the difference in the tightness of the cable. Make sure that the filtration performance after the replacement of the filter cloth group 3 can maintain the same quality.

In summary, the filter cloth set 3 can be easily replaced by the arrangement of the outer upright piece 32, the inner upright pieces 33 and the zipper members 34, and the same can be maintained for each replacement. Quality, so it is indeed possible to achieve the object of the present invention.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

Claims (6)

A filter unit is provided for a drafter capable of guiding a gas flow, the filter unit comprising: a frame group including an upstream of the exhaust fan in an up and down direction and located upstream of the airflow guided by the exhaust fan and perpendicular to a horizontal plane surrounding the vertical plane and a vertical surrounding board disposed perpendicular to the horizontal plane; and a filter cloth set including a bottom sheet located below the standing surrounding panel, an upwardly extending outer periphery of the backsheet and located in the standing surround An outer gusset on the outer side of the panel, at least one inner slab extending upward from the backsheet and located on the inner side of the standing rim, at least one disposed between the contiguous inner panel and the outer erect sheet and erected with the inner layer The zipper member and the outer aligning piece jointly cover the zipper member of the standing surrounding plate, and a plurality of filter tubes disposed on the bottom slab and guided by the exhaust fan to guide the airflow, the bottom slab having a plurality of intervals and along the a perforation penetrating in the up-and-down direction, each filter tube has a tube portion connecting the bottom sheet and surrounding the respective perforations, and a tube connecting the tube portion opposite to the bottom sheet the top of. The filter unit of claim 1, wherein the outline of the standing surrounding plate is fan-shaped. The filter unit of claim 2, wherein the frame group further comprises a plurality of spacers connected to the standing surrounding board to divide the area surrounded by the standing surrounding board into a plurality of isolated spaces, the standing surrounding board having a plurality of An isolated section separated by the spacers. The filter unit of claim 3, wherein the filter cloth group comprises a plurality of inner erect sheets respectively located inside the isolation segments, and a plurality of the upper slabs and the outer slabs are disposed between the inner slabs and the outer slabs The inner slab and the outer slab together cover the zipper members of the isolating segments. The filter unit of claim 3, wherein each of the spacers has an opposite first end and a second end, and the first ends of the spacers are adjacent to each other. The filter unit of claim 5, wherein the first ends of the spacers are connected to a center of the sector, and the second ends of the spacers are connected to the arc of the sector.