JP2002306909A - Filter element structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter element structure which is held with filter media at frame members and makes it possible to obtain a good filter function. SOLUTION: Outer peripheral end edges 12 and 19 of the pleat-folded filter media 11 are embedded and are integrally molded in the frame members 13 made of resins. Areas 13a of the frame members 13 where the end edges 19 constituting the corrugated shapes of the filter media 11 are embedded are provided with slits 16 along these areas 13. The inner frame sections 18 and the outer frame sections 17 are formed on both sides of the slits 16 by the slits. The filter media 11 pass through the slits 16 and are embedded in the inner frame sections 18 and the outer frame sections 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element structure for filtering a gas or liquid to remove impurities.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 to 6, this type of filter element structure has a filter material 1 and an outer peripheral edge 2 which are formed with a plurality of folded ridges 5 and folded in a zigzag manner. The filter element 7 is embedded in a resin-made frame member 3 for holding the filter member 1, and the filter element 1 and the frame member 3 are integrally formed by injection molding.

That is, the molding die of the filter element 7 is provided with a molding space for molding the frame member 3 therein, a gap communicating with the molding space and the filter medium 1 being disposed, and is vertically divided into two parts. It has a possible structure.

[0004] By disposing the filter medium 1 at a predetermined position of the lower mold, the outer peripheral edge 2 of the filter medium 1 is inserted into the molding space, and after the upper mold is overlapped. The resin is injected into the molding space to form the filter element 7.

[0005]

However, since the filter medium 1 of the conventional filter element 7 has a folded shape, the edge 2a along the direction of the fold 5 is parallel to the molding space in the molding die. Although it is easy to be arranged and buried in the frame member 3, the edge 2b having a wavy shape is unstablely arranged in the molding space. For this reason, when the resin is injected into the molding space, the unstable flow of the resin causes the unstable edge 2b to be kinked or collapsed, and is not sufficiently buried in the frame member 3 so that the filtering material 1 is not buried.
May not be sufficiently held by the frame member 3.

[0006] In particular, when the filter element 7 having a low holding force of the filter medium 1 is installed at a place where the pressure difference is large before and after the filter element 7, a part of the filter medium 1 comes out of the frame member 3. Would. Therefore, there is a problem that a leak occurs in a part of the filter element 7 and the fluid that is not filtered flows to the clean side and impurities are not completely removed.

The present invention has been made in view of such conventional problems, and has as its object to provide a filter element structure in which a filter medium is sufficiently held by a frame member and a good filter function can be obtained.

[0008]

In order to achieve the above object, a filter element structure according to the present invention is a filter element in which the outer peripheral edge of a folded filter material is embedded in a resin frame member and integrally formed. In the element, the frame member includes:
At the portion of the frame member in which the wavy edge of the filtering material is embedded, an outer frame portion and an inner frame portion are provided at an interval, and the filtering material penetrates the inner frame portion to the outer frame portion. It is characterized by being buried.

According to the above construction, since the outer frame portion and the inner frame portion in which the corrugated edges of the filter medium are buried are spaced apart from each other, the molding space is formed in the molding die. There is a part that separates. On the other hand, since the filtering material penetrates the inner frame portion and is embedded in the outer frame portion, it is disposed so as to straddle the space forming the outer frame portion and the space forming the inner frame portion. In other words, the filtering material provided so as to straddle the space forming the outer frame portion and the space forming the inner frame portion is able to divide these spaces by the divided parts. In this state, the resin is filled in the molding die to form the inner frame portion and the outer frame portion, so that the filtering material is pressed by the molding die and does not twist or fall due to the flow of the resin. And can be firmly held.

Therefore, even if this filter element is installed at a place where the pressure difference is large before and after the filter element, a good filter function can be obtained without leakage between the filter medium and the frame member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a plan view of FIG.

The filter element 10 of the present embodiment is
A filter member 11 which has a plurality of folds and is formed in a fold and fold shape and has a substantially square shape in plan view, and a frame member 13 having outer peripheral edges 12 and 19 embedded therein to form an outer shape of the filter element 10.
It is composed of

The frame member 13 surrounds the filter medium 11 and has a substantially square shape.
An edge 12 parallel to the fold 14 is embedded, and a wave-shaped edge 19 perpendicular to the fold 14 is embedded on the other opposite side.

Each of the portions 13a of the frame member 13 in which both end edges 19 of the corrugated shape are buried are provided with slits 16 parallel to the portions 13a, and the outer frame portions 17 are provided on both sides thereof.
And an inner frame portion 18 are formed. And filtration material 1
The edge 19 having the wavy shape is formed by the inner frame portion 18 and the slit 1.
6 is provided so as to reach the outer frame portion 17, and the filtering material 11 is held by the inner frame portion 18 and the outer frame portion 17.

That is, the inside of the frame member 13 is closed by the filter member 11, and the filter member 11 and the frame member 13 are formed integrally.

The filter element 10
A frame member 1 is formed by using a mold that is divided into two in the vertical direction.
3 and the filter medium 11 are injection-molded so as to be integrated.

The upper and lower molds are superposed,
A molding space in which the frame member 13 is molded is formed therein, but before being overlapped, the filtering material 1 is placed on the lower molding die.
1 is placed. At this time, the filter medium 11 is arranged so that the outer peripheral edges 12, 19 enter the molding space, and then the upper mold is overlapped.

At this time, a projection for forming a slit 16 between the outer frame portion 17 and the inner frame portion 18 is provided in the molding die. For this reason, the filter medium 11 arranged in the molding die is pressed by the projection between the space forming the inner frame 18 and the space forming the outer frame 17.

In this state, the resin injected into the molding space is filled, cooled, and then removed from the mold to form the filter element 10.

That is, when the resin is injected into the molding space, the corrugated edge 19 of the filter medium 11 is pressed by the molding die. The edge 19 can be buried in the frame member 13 and held firmly.

As shown in FIG. 2, the filter element 10 is attached to a casing of an air filter or another filter housing by an attaching portion 21 provided on the outer surface 20 of the frame member 13 so that gas or liquid is supplied in the direction of the arrow. And filter them to clear them. At this time, even if a large pressure difference occurs in the space before and after the filter element 10 is installed, since the filter medium 11 is firmly held by the frame member 13, it is unlikely that leakage occurs between them. Absent.

In particular, since the filter medium 11 is pressed by the mold outside the inner frame portion 18, the filter medium 1 is
1 is securely held. Accordingly, the slit between the inner frame portion 18 and the outer frame portion 17 is closed without penetrating,
When only the inside of the inner frame portion 18 functions as a filter, a more reliable cleaning action can be obtained.

[0023]

According to the above construction, the filter material is embedded in the outer frame portion through the inner frame portion provided in the frame member of the filter element to be formed. The filtering material is held down by the portion that separates the inner frame portion and the outer frame portion. Therefore, the filter medium is firmly held without kinking or falling due to the flow of the resin, and the completed filter element can have a good filter function without causing leakage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a filter element according to the present invention.

FIG. 2 is a side sectional view of the filter element.

FIG. 3 is a plan view of the filter element.

FIG. 4 is a perspective view showing a conventional filter element.

FIG. 5 is a side sectional view of a conventional filter element.

FIG. 6 is a plan view of a conventional filter element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Filter element 11 Filter material 12 Edge (outer edge) 13 Frame member 16 Slit 17 Outer frame 18 Inner frame 19 Edge (outer edge)

Claims (1)

[Claims] 1. A filter element in which an outer peripheral edge of a folded filter material is embedded in a resin frame member and integrally formed, wherein the frame member has a wavy edge of the filter material. A filter element, wherein an outer frame portion and an inner frame portion are provided at an interval at a portion of a frame member to be buried, and the filter material penetrates the inner frame portion and is buried in the outer frame portion. Construction.