JP2008119569A - Frame for filter and filter unit using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame which can be easily assembled with firm bonding and which easily copes with various sizes only by cutting to given sizes, and a filter unit using the same. <P>SOLUTION: This frame is formed by connecting a corner member to an intermediate member, and the corner member has a thick part and a thin part in the connection direction with the intermediate member. The thin part has protrusions to be engaged with the intermediate member. The intermediate member has a roughly U-shaped section having a bottom part and erected parts from the bottom part. The erected part has a protruded part forming a rail-like groove with which the protrusions are engaged in the connecting direction with the corner member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filter frame that can be suitably used for air cleaning applications, and a filter unit using the frame.

  A filter unit in which a filter medium is stored in a frame is used in an air conditioner used in buildings, factories, and the like. Such a filter unit has a shape formed by applying or inserting a bead or a separator between the peaks and valleys of a nonwoven fabric (filter material) that has been processed into a valley shape called pleating, for example. That is, it is housed in the frame in a state in which the distance between the pleats is ensured to be constant.

  Since the frame body of such a filter unit assembles the frame body after storing the filter medium, a mechanism for joining the sides is required. Conventionally, joining of each side has been performed by screwing or riveting, but the work of screwing or riveting is troublesome and the work efficiency is poor. In addition, since air conditioners often require filter units of different sizes, it has been necessary to drill holes for screwing or riveting the frame after cutting the frame to a predetermined size.

Also, in order to save time and effort such as screwing and riveting to improve productivity, a method of assembling and fixing by providing unevenness on the joint part, and a joint part with a fitting structure, above one peripheral wall of the fitting member There is a method of providing a claw portion along the edge (see, for example, Patent Document 1). With these methods, there is no need for screwing or riveting, and work efficiency can be improved. However, in the former, when a filter unit having a different size is requested, it is necessary to cut the frame body to a predetermined size and then further process the uneven portions for joining to the frame body. This is similar to the method described above in that it takes time and effort. In the latter case, a frame having a desired size can be easily formed by simply cutting the frame into a predetermined size. However, the frame is the upper edge of the peripheral wall that is one member of the fitting structure. There is a problem that it is difficult to bond firmly because it is connected only by the claw part provided in the.
JP 2000-254425 A

  The object of the present invention is to solve the above-mentioned problems, and it is possible to easily assemble a frame body to be firmly joined, and to easily make various sizes by simply cutting to a predetermined size. And a filter unit using the same.

In order to achieve the above object, the present invention has any one of the following configurations (1) to (3).
(1) A frame formed by connecting a corner member and an intermediate member, wherein the corner member has a thick portion and a thin portion in a connecting direction with the intermediate member, and the thin portion is the intermediate portion. The intermediate member has a bottom surface portion and a standing portion extending from the bottom surface portion, and has a substantially U-shaped cross section, and the standing portion is the corner. A frame having a protrusion that forms a rail-like groove with which the protrusion engages in a connecting direction with a member.
(2) A filter unit comprising a filter element housed in the frame according to (1).
(3) The protrusion engages with the rail-shaped groove to form a filter element receiving portion, and the adhesive is used for the filter element, the thin portion, the protrusion, and the convex portion in the filter element receiving portion. The filter unit according to (2), wherein:

  According to the present invention, it is possible to easily assemble a frame body to be strongly bonded, and it is possible to easily cope with various sizes because the frame members can be bonded simply by cutting them to a predetermined size. . Specifically, the corner member has a thick portion and a thin portion in a connecting direction with the intermediate member, the thin portion has a protrusion that engages with the intermediate member, and the intermediate member has a bottom portion and the bottom portion. The cross section has a substantially U-shaped cross section, and the vertical section has a protrusion that forms a rail-shaped groove that engages with the protrusion in the connecting direction with the corner member. Since it is a frame, the frame can be assembled simply by cutting the intermediate member to a desired size. And after storing a filter element in this frame, since the said projection and a convex part can be joined directly with the adhesive which seals the end face of a filter element, even with a small amount of adhesives, a corner member and The intermediate member can be firmly bonded.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. The frame of the present invention is a frame formed by connecting a corner member and an intermediate member. FIG. 1 shows a schematic perspective view of the corner member, and FIG. 2 shows a schematic perspective view of the intermediate member.

  The corner member has a thick portion 1 that is a connecting portion between a thick portion 1 that is a corner portion of the filter and an intermediate member, and the thin portion 2 has a protrusion 3. The protrusions 3 are for engaging the intermediate member and strengthening the coupling, and one or more at least one thin portion 2, preferably one at each end in the filter depth direction as shown in FIG. It is desirable to have the above protrusions.

  The intermediate member has a substantially U-shaped cross section, and includes a bottom surface portion 6 and a standing portion 4 from the bottom surface portion. And the standing part 4 has the convex part 5 extended in the connection direction with a corner member, in order to form the rail-shaped groove | channel with which the projection part 3 engages. By inserting the thin portion 2 of the corner member between the bottom surface 6 of the intermediate member and the rail-shaped convex portion 5 and sandwiching the projection portion 3 of the corner member, the intermediate member and the corner member are engaged. And bond tightly. In particular, when the filter element is housed in the frame and joined with an adhesive as will be described later, the filter element receiving portion is formed by engaging the thin wall portion 2 with the rail-shaped groove. The filter element is housed in the container, and an adhesive such as a urethane adhesive or a hot melt adhesive is poured to seal and fix the filter element, so that the adhesive is the filter element, the thin part 2, the protrusion part 3, and the convex part 5. It solidifies in direct contact with all of these, and these can be firmly bonded.

  In the present invention, as described above, the corner member is provided with the thick portion 1 and the thin portion 2, and the thin portion 2 is inserted between the bottom surface 6 of the intermediate member and the rail-shaped convex portion 5 to be coupled. Therefore, the peripheral wall eventually becomes a flat frame, and as a result, it is possible to prevent the flow of the material to be filtered from being disturbed.

  The height H1 of the standing portion 4 is preferably in the range of 5 mm to 30 mm. Since a resin adhesive such as a urethane adhesive or a hot melt adhesive is preferably used for sealing the filter element and the frame, the adhesive leaks out of the frame when the height H1 of the standing portion 4 is less than 5 mm. There is a risk that. On the other hand, when the height H1 of the standing portion 4 is more than 30 mm, the flow of the material to be filtered sprayed on the filter element may be hindered. The height H <b> 1 of the standing portion 4 is defined by the length from the bottom surface 6 of the intermediate member to the upper end of the standing portion 4.

  The height H2 of the rail-shaped convex part 5 is preferably 0.5 mm or more. If it is 0.5 mm or less, there is a possibility that the joint portion with the projection 3 of the corner member is reduced and the strength cannot be secured. On the contrary, the height H2 of the convex portion 5 is not limited to a higher one. For example, there is no problem even if the protrusions at both ends are connected and integrated. The height H <b> 2 of the convex portion 5 is defined by the length from the inner wall of the standing portion 4 to the upper end of the convex portion 5.

  In the present invention, the material of the frame is not particularly limited, but metal, resin, and wood are preferably used from the viewpoint of strength.

  The frame of the present invention houses a filter element inside to form a filter unit. The filter medium used in the filter element is not particularly limited as long as it is a breathable sheet, and woven fabric, non-woven fabric, film secant, net, paper or the like is used.

  In particular, in air cleaner applications used in home air purifiers and air conditioning equipment such as buildings, factories, and automobiles, the pressure loss is small so as not to impair air permeability, and there is sufficient strength against wind pressure. However, when processed into a shape such as pleats, it is required to have rigidity that can maintain the shape and suppress an increase in pressure loss due to shape change, and excellent workability when forming into a shape such as pleats. Therefore, it is desirable to use a nonwoven fabric.

  Nonwoven fabrics include wet nonwoven fabrics, resin bond dry nonwoven fabrics, thermal bond dry nonwoven fabrics, spunbond dry nonwoven fabrics, needle punch dry nonwoven fabrics, water jet punch dry nonwoven fabrics, melt blown dry nonwoven fabrics, flash spinning dry nonwoven fabrics, etc. Any non-woven fabric may be used. The filter medium may be electretized, and it has added value and added function by adding at least one of flame retardant, water repellent, fragrance, deodorant, antibacterial agent, antiviral agent, antiallergen agent, etc. It may be. The filter medium of the present invention may be constituted by laminating these sheet-like materials into two or more layers.

And these filter media are processed and used for forms, such as a pleat, a honeycomb, or a three-dimensional net | network state, for example. Among them, a pleated form is preferable in an air filter attached to a home air cleaner or a building / factory air conditioner that mainly removes fine particles of 100 μm or less such as pollen and dust.

  The filter unit of the present invention can be mounted as a filter in machines and devices such as home appliances, buildings, factories, and cars.

It is a schematic perspective view which shows one Embodiment of the corner member which comprises the frame of this invention. It is a schematic perspective view which shows one Embodiment of the intermediate member which comprises the frame of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thick part in corner member 2 Thin part in corner member 3 Projection part in corner member 4 Standing part in intermediate member 5 Convex part provided in standing part of intermediate member 6 Bottom face in intermediate member

Claims (3)

  A frame formed by connecting a corner member and an intermediate member, wherein the corner member has a thick portion and a thin portion in a connecting direction with the intermediate member, and the thin portion is engaged with the intermediate member. The intermediate member has a bottom surface portion and an upright portion from the bottom surface portion, and has a substantially U-shaped cross section, and the upright portion is in contact with the corner member. A frame having a protrusion that forms a rail-like groove with which the protrusion engages in a connecting direction.   A filter unit comprising a filter element housed in the frame according to claim 1.   The protrusion engages with the rail-shaped groove to form a filter element receiving portion, and an adhesive joins the filter element, the thin portion, the protrusion, and the convex portion at the filter element receiving portion. The filter unit according to claim 2.

Images