JP4258725B2 - Filter element - Google Patents

Description

  The present invention relates to a filter element applied to an exchangeable filter in which a filter element made of a folded filter medium is detachably attached to a frame body. Specifically, a filter element that has excellent shape stability and can easily cope with changes in the opening size of the frame on which the filter element is installed, and can share parts and greatly reduce the types About.

  Conventionally, as shown in FIG. 6 and those shown in FIGS. 7 to 9 are known as exchangeable filters in which a filter element made of a folded filter material is detachably attached to a frame.

  The exchangeable filter 1 shown in FIG. 6 comprises a fine dust filter 2 provided with a plurality of blow-off pockets 4 by a filter medium N folded inside the frame body 3, and a mounting frame is provided on the windward side of the fine dust filter 2. The filter medium N attached to the filter 3 is integrally incorporated with a coarse dust filter 5 having a plurality of blow-off pockets 4 ′ fitted along the inner surface of the blow-off pocket 4 of the fine dust filter 2. (See Patent Document 1).

In the exchangeable filter 11 shown in FIG. 7, the filter element 13 provided with the L-shaped ears 12 at both ends of the folded filter medium N is provided with recesses 14 for receiving the ears 12 on the left and right inner surfaces on the upstream side of the frame. It is attached in the provided frame 15. In this interchangeable filter 11, as shown in FIG. 8, a non-woven fabric 16 having a U-shaped cross section is bonded to the top and bottom of the pleated filter medium N as the filter element 13, and the nonwoven fabric 16 is alternately arranged at predetermined intervals. 9 which is cut while leaving one bent piece, and the folded piece that is not cut for each cutting unit is opened and closed as a hinge, and is folded into a small size, or FIG. As shown, the pleated filter medium N is cut to a predetermined size, and the reinforcing bands 17 made of a nonwoven fabric or a plastic plate are alternately bonded to each widthwise end of each cut filter medium N. For each unit, a reinforcing plate 17 that is opened and closed as a hinge and folded in a small size is used (see Patent Document 2).
Japanese Utility Model Publication No. 64-21727 JP-A-7-112107

  However, in the exchangeable filter 1 shown in FIG. 6, since the filter element (coarse dust filter 5) is fixed over the entire width of the opening, it is difficult to lose its shape even at a high air volume, but has excellent shape stability. There was a problem that it was not possible to cope with the change of the frontage dimension on the upstream side of the frame 3 to which the filter element (coarse dust filter 5) is attached, and it was dedicated to the frame having the initially determined opening dimension. .

  On the other hand, in the filter element 13 in the exchangeable filter shown in FIGS. 7 to 9, the folded piece or the reinforcing plate 17 made of the nonwoven fabric 16 can be opened and closed as a hinge, and can be handled by being folded small. Although it has an advantage that it can easily cope with the change of the frontage dimension, there is a disadvantage that the shape of the filter element 13 is variable, so that the shape stability is inferior. In particular, as a trend of recent air conditioning equipment, when the filter element itself is required to be thin, it must satisfy the requirement that it is thin and excellent in shape stability even at high airflow. This was an important issue as a filter element in a replaceable filter.

  The present invention has been made in view of the above technical problem, and has excellent shape stability and can easily cope with a change in the opening size of the frame body on which the filter element is installed, thereby sharing parts. An object of the present invention is to provide a filter element that can greatly reduce its type.

  In order to achieve the above object, the invention according to claim 1 is a filter element comprising a filter medium that is pleated and further folded into a W shape, wherein at least one V-shaped part of the filter medium top part has the V-shaped part. A first end member for fixing the V-shape and the pleat shape is attached, and a pleat shape is fixed to the V-shape portion of the filter medium top portion to which the first end member is not attached and the top portion of the filter medium end portion. The gist of the filter element is that the second end member is attached.

  The gist of the invention according to claim 2 is a filter element characterized in that a substantially L-shaped ear portion is provided at both ends of the filter medium.

  In the element of the present invention, the first end member for fixing the V shape and the pleat shape of the V-shaped portion is attached to at least one V-shaped portion of the filter media top portion, and the first of the filter media top portion Since the 1st end member is not attached and the 2nd end member which fixes a pleat shape is attached to the top and bottom part of the said filter medium end part, it is excellent in shape stability, and the frame which installs the said filter element It is possible to easily cope with changes in the size of the body, share parts, and greatly reduce the types.

  Hereinafter, the filter element of the present invention (hereinafter simply referred to as an element) will be described in detail with reference to the drawings. As shown in FIGS. 1 to 5, the element 21 of the present invention pleats a filter medium N such as a nonwoven fabric, paper, glass fiber paper, etc. having a shape retaining property that does not easily collapse after folding. Folded) and then folded into a W shape (secondary folding).

  As shown in FIGS. 1 and 2, the filter medium N is pleated (primary folding) and further folded into a W-shape (secondary folding). A plurality of V-shaped portions X are formed between the fold and the fold mountain.

  The folded element 21 is expanded or folded in the direction of both ends, thereby widening or narrowing the distance between the folds and the folds. The shape is also shallow and wide V-shaped or deep and narrow V-shaped.

  In the element 21 of the present invention, first end members 22a and 22b for fixing the V-shape and pleat shape of the V-shaped portion X are attached to at least one V-shaped portion X of the filter medium top portions 21a and 21b.

  The first end members 22a and 22b have a rigidity necessary for holding a pleated shape and a V-shape formed by secondary folding, such as a nonwoven fabric impregnated with a resin, a plastic plate, a metal plate, and the like. Any sheet material may be used as long as it is air permeable or has a pressure loss higher than that of the filter medium N.

  Further, the first end members 22a and 22b have a V-shape (FIG. 5), a parallelogram shape (FIG. 5) corresponding to the shape of the V-shaped portion X to be fixed to the folded filter medium top portions 21a and 21b. 3) and a shape such as a trapezoidal shape (FIGS. 2 and 4).

  The first end members 22a and 22b are attached to the filter medium top portions 21a and 21b through an adhesive, and hot melt resin is applied to the V-shaped portion X of the filter medium top portions 21a and 21b to be fixed in shape. The two can be integrated by heating and pressurizing.

  On the other hand, the V-shaped portion X where the first end members 22a and 22b of the filter medium top portions 21a and 21b are not attached and the second end member 23 that fixes the pleat shape to the top and bottom portions of the filter medium end portions 21c and 21d are attached. It has been.

  Similar to the first end members 22a and 22b, the second end member 23 has a rigidity necessary for maintaining a pleated shape, such as a nonwoven fabric impregnated with resin, a plastic plate, or a metal plate, and is non-breathable or a filter medium. A sheet material having a higher pressure loss than N is used.

  The second end member 23 is cut or formed into a substantially rectangular shape corresponding to the shape of the filter medium top portions 21a and 21b folded into a pleat shape, and is the same as the first end members 22a and 22b. It attaches to the filter medium top part 21a, 21b by etc.

  As described above, the element 21 in which the first end members 22a and 22b and the second end member 23 are attached to the filter medium top portions 21a and 21b has the pleated shape and V of the V-shaped portion X to which the first end members 22a and 22b are attached. The character shape is fixed and is held so as not to be easily deformed by high wind pressure.

  In addition, for the V-shaped portion X to which the filter medium end portions 21c and 21d and the first end members 22a and 22b to which the second end member 23 is attached is not attached, only the pleat shape is fixed and the V-shape is fixed. Absent.

  For this reason, the filter medium end portions 21c and 21d to which the second end member 23 is attached and the V-shaped portion X to which the first end members 22a and 22b are not attached can be freely opened and closed.

  The form shown in FIG. 1 and FIG. 2 is the first in three V-shaped parts X in the center among the five V-shaped parts X in the filter medium top portions 21a and 21b formed by the primary folding process and the secondary folding process. End member 22a, 22b is attached, and the substantially trapezoid shape and pleat shape which consist of the three V-shaped parts X are fixed, and the filter element end part 21c to which the pleat shape is fixed by attaching the second end member 23 21d can be freely opened and closed as indicated by arrows in FIG.

  The form shown in FIG. 3 includes four V-shaped portions X excluding the leftmost V-shaped portion X among the five V-shaped portions X in the filter medium top portions 21a and 21b formed by the primary folding process and the secondary folding process. The first end members 22a and 22b are attached to each other, and the substantially parallelogram shape and pleat shape formed by the four V-shaped portions X are fixed, and the second end member 23 is attached to fix the pleat shape. Further, the filter medium end 21c can be freely opened and closed as indicated by an arrow in FIG.

  In the form shown in FIG. 4, among the five V-shaped portions X in the filter medium top portions 21 a and 21 b formed by the primary folding process and the secondary folding process, the first end member 22 a is formed on the right three V-shaped parts X. , 22b is attached, and the substantially trapezoidal shape and pleat shape composed of three V-shaped portions X are fixed, and the V-shaped portion X to which the filter medium end portion 21c and the first end members 22a, 22b are not attached is fixed. The second end member 23 is attached to the filter medium top and bottom portions 21a, 21b, and the pleat shape in the part is fixed. As a result, the part to which the second end member 23 is attached is indicated by an arrow in FIG. It can be opened and closed freely.

  The form shown in FIG. 5 is the first end member 22a in the central V-shaped portion X among the five V-shaped portions X in the filter medium top portions 21a and 21b formed by the primary folding process and the secondary folding process. , 22b is fixed, and the V-shaped portion and the pleat shape in the V-shaped portion X are fixed, and the filter medium top portion forming the V-shaped portion X to which the filter medium end portion 21c and the first end members 22a, 22b are not mounted The second end member 23 is attached to 21a and 21b, and the pleated shape in the part is fixed, so that the part to which the second end member 23 is attached can freely open and close as indicated by arrows in FIG. It can be done.

  Thus, in the element 21 of the present invention, the V-shape and pleat shape of the portion to which the first end members 22a and 22b are attached are fixed and held so as not to be easily deformed even by high wind pressure. It has become so. On the other hand, for the portion to which the second end member 23 is attached, only the pleat shape is fixed and can be freely opened and closed, which makes it easy to change the frontage dimension of the frame 24 to which the element 21 is mounted. It can be supported.

  In addition, ears 25 having a substantially L-shaped cross section are provided at both ends 21c and 21d of the filter medium of the element 21 of the present invention. The shape of the ear portion 25 is not easily collapsed by wind pressure during use or external force applied during handling, such as a nonwoven fabric or a plastic plate impregnated with resin, similar to the first end members 22a and 22b and the second end member 23. A sheet material having a certain degree of rigidity and non-breathable or having a higher pressure loss than the filter medium N is used.

  The ear portion 25 shown in FIG. 2 is provided so that the tip thereof is directed toward the downstream side, and in accordance with the opening size of the frame member 24, both end portions of the filter medium that can be opened and closed of the element 21 are widened. The element 21 is mounted by inserting the tips of the ear portions 25 having a substantially L-shaped cross section provided in the portions 21c and 21d into the recesses 24a formed of slit-like grooves provided on the left and right inner surfaces on the upstream side of the frame body 24. It has been made.

  After the element 21 is mounted on the frame body 24, the V-shaped and pleated shapes of the element 21 are the first end members even when the wind pressure during operation is applied thereto. Since it is being fixed by 22a, 22b, it becomes difficult to produce the deformation | transformation by a wind pressure.

  Further, when the wind pressure during operation is applied, the element 21 is pushed downstream, whereby the ear portions 25 of the filter medium end portions 21c and 21d are brought into close contact with the inner wall of the recess 24a by the force, and the filter medium end portions It is difficult for gaps to be formed between 21c and 21d and the frame body 24, thereby preventing the occurrence of air leaks.

  The elements of the present invention are not limited to those shown in the above-mentioned drawings. For example, as shown in FIG. 2, the width direction end portion 21e (V-shaped) of the filter medium N that has been subjected to primary folding and further secondary folding. The portion in contact with the apex of the portion) is alternately bonded with a reinforcing band made of a nonwoven fabric or a plastic plate so that the width direction end portion 21e is not easily damaged by a force applied at the time of opening and closing. It can be changed freely within the specified range.

The perspective view which shows the element of this invention. The top view which shows a state when the element of this invention is mounted | worn to a frame. The top view which shows one attachment state of the 1st end member in the element of this invention, and a 2nd end member. The top view which shows another attachment state of the 1st end member in the element of this invention, and a 2nd end member. The top view which shows another attachment state of the 1st end member and 2nd end member in the element of this invention. The perspective view which shows the conventional exchangeable filter. The top view which shows another conventional exchangeable filter. The perspective view which shows the element with which the exchange type filter shown in FIG. 7 is mounted | worn. The perspective view which shows another element with which the exchangeable filter shown in FIG. 7 is mounted | worn.

Explanation of symbols

21 ... elements 21a, 21b ... filter medium top part 21c, 21d ... filter medium both ends 22a, 22b ... first end member 23 ... second end member 24 ... frame body 24a ...・ Recess 25 ... Ear N ... Filter medium X ... V-shaped part

Claims (2)

  In a filter element made of a filter material that has been pleated and further folded into a W shape, a first end member that fixes the V-shape and pleat shape of the V-shape portion is attached to at least one V-shape portion of the filter media top portion. And a V-shaped portion of the filter medium top portion to which the first end member is not attached and a second end member for fixing a pleat shape to the top portion of the filter medium end portion. element.   The filter element according to claim 1, wherein ears having a substantially L-shaped cross section are provided at both ends of the filter medium.

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