JPH10272321A - Air filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a pre-filter integrally with a main filter, and to prevent the material of the pre-filter from being limited, by inserting the pre-filter into a pair of grooves formed between a first and second projections protruding inwardly respectively to upper and lower surfaces upstream of a box-shaped frame, to which a main filter is mounted. SOLUTION: An outer projection 3A of a first projection 1 and an inner projection 3B of a second projection each having the same length as the width of a main filter frame 1 and protruding inward are formed respectively on the upper and lower surfaces of the main filter frame 1 having a wooden box- shape, on the upstream side from the main filter frame 1. A pre-filter 2, in which a pre-filter material 2A of non-woven fabric is held by a pre-filter frame 2B of aluminum material, is mounted to a filter mount groove 4 in a gap between the projection 3A and the projection 3B. A main filter using a glass fiber filter material is fixed to the frame 1 so as to be sealed therein on the downstream side of the pre-filter 2, whereby a complex structure is not needed in an air conditioner so that cost can be reduced and filters can be easily replaced and hence maintenance can be made easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter used for building air conditioning.

[0002]

2. Description of the Related Art Conventionally, as an air filter for building air conditioning,
A configuration described in Japanese Utility Model Laid-Open No. 6-24716 is known. In this configuration, a pre-filter for removing coarse dust and a main filter for removing fine dust are separately used. First, coarse dust is removed by the pre-filter, and the air is passed through the main filter to remove fine dust. In the case where the pre-filter and the main filter are separately provided as described above, each mounting mechanism is required in the chamber, and there is a problem that the whole volume becomes large and the space efficiency is poor. In addition, the manufacturing process is complicated and costly, and workability during maintenance is inefficient. In order to solve such a problem, there has been proposed a configuration in which a pre-filter and a main filter are integrally attached to one unit. Japanese Utility Model Publication No. 7-30107 is an example of this, in which a pair of holding plates are protrudingly provided on a peripheral surface of a frame-like frame for fixing a main filter to form an insertion groove.
A pre-filter is attached to this to cover the opening of the frame-shaped frame.

[0003]

However, since the pre-filter is generally flexible and does not have its own shape-retaining property, the pre-filter is deformed by arranging it on a wire or the like on the inner surface side in the above-mentioned conventional configuration. Need to be prevented. Also,
Since the insertion groove is covered with the holding plate, there is a problem that only a flexible pre-filter can be inserted.

The present invention has been made to solve the above problems, and has as its object to provide an air filter in which a prefilter and a main filter are integrated and the material of the prefilter is not limited. .

[0005]

According to the first aspect of the present invention, there is provided an air filter according to the present invention, wherein first and second upper and lower surfaces on the upstream side of a box-shaped filter frame on which a main filter is mounted are formed so as to protrude inward. A projection and a second projection are formed, and a pre-filter is inserted and mounted by a pair of upper and lower pre-filter mounting grooves formed between the first projection and the second projection. An air filter according to a second aspect of the present invention is the air filter according to the first aspect, wherein the prefilter holds a prefilter material in a prefilter frame. An air filter according to a third aspect of the present invention is the air filter according to the first aspect, wherein the main filter and the pre-filter are formed of a flammable material.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is characterized in that a first projection and a second projection are formed on each of the upper and lower surfaces on the upstream side of a box-shaped filter frame on which a main filter is mounted so as to project inward. The pre-filter is inserted and mounted by a pair of upper and lower pre-filter mounting grooves formed between the first protrusion and the second protrusion, so that the main filter and the pre-filter are integrated, and the air conditioner has this integrated configuration. There is no need for a special mechanism for mounting the main filter and the pre-filter, which is advantageous in terms of cost. Further, according to the present invention, the pre-filter can be mounted and replaced by inserting and replacing the pre-filter from the left and right directions along the pair of upper and lower pre-filter mounting grooves. It can be carried out. Therefore, it is possible to use a prefilter in which the prefilter material is held by the prefilter frame. By using a pre-filter having such a pre-filter frame, it is not necessary to take any additional measures to prevent deformation of the pre-filter. Further, according to the present invention, the main filter and the pre-filter can be incinerated by using a flammable material, thereby facilitating disposal.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an air filter 10 according to the embodiment, and FIG. 2 is a side view of the air filter 10. The box-shaped main filter frame 1 made of wood has outer protrusions 3A as first protrusions and inner protrusions 3B as second protrusions formed on upper and lower surfaces on the upstream side, respectively. . Here, the outer protrusions 3A and the inner protrusions 3B are formed to protrude inward with the same length as the width of the main filter frame 1. Then, a pre-filter mounting groove 4 is formed by a gap between the outer projection 3A and the inner projection 3B, and a pre-filter medium 2A made of a nonwoven fabric is formed in the pre-filter mounting groove 4.
Is mounted on a pre-filter frame 2B made of an aluminum material. Downstream of the pre-filter 2 is a main filter 5 using a glass fiber filter medium.
Are sealed and attached to the main filter frame 1.
As a result, the main filter 5 and the pre-filter 2 substantially come into contact with each other, and an air filter in which both are integrated is formed. The pre-filter 2 has a configuration in which a pre-filter material 2A is held by a pre-filter frame 2B, and the pre-filter 2 is inserted into a pre-filter mounting groove 4 formed in a gap between the outer projection 2 and the inner projection 3B. Because I am wearing it,
It can be installed without being affected by the material, hardness, form, etc. of the pre-filter.

Next, the operation of the above embodiment will be described with reference to FIG. In FIG. 3, between the air conditioner 6 and the duct 7,
A chamber 8 for mounting an air filter is formed. The air filter 10 according to the present invention is mounted in the air filter mounting chamber 8. After installation, the door 9 is closed, and the attachment of the air filter 10 to the air conditioner is completed. Air conditioner 6
First, coarse dust is removed by the pre-filter 2 of the air filter 10, fine dust is removed by the main filter, and the dust is supplied to the duct 7 to discharge clean air into the room to be air-conditioned. When the pre-filter 2 becomes dirty and needs to be replaced, the door 9 is opened and the pre-filter 2 is pulled out from the pre-filter mounting groove 4. At this time, the main filter 5 may be left as it is, and need not be removed from the main filter frame 1. Next, the new pre-filter 2 is inserted into the pre-filter mounting groove 4 and the door 9 is closed, thereby completing the replacement operation.

According to this embodiment, the replacement and installation of the pre-filter 2 can be performed simply by attaching and detaching the pre-filter 2 to and from the pre-filter mounting groove 4, as described above. I can do it. Therefore, maintenance becomes very easy. In the above-described embodiment, a wooden box is described as the main filter frame 1. However, the main filter frame 1 may be made of any material that can form a box, such as metal, paper, or plastic. Similarly, the outer protrusion 3A and the inner protrusion 3B can be made of metal, paper, plastic, or the like, as well as wooden. The shape is not particularly limited as long as it can form the pre-filter mounting groove 4, and various modifications such as a triangular, quadrangular, and semi-elliptical cross section are possible. In addition, as the main filter material, other than glass fiber, a non-woven fabric such as a nonwoven fabric having a colorimetric efficiency of 60 to 95% may be used. In particular, by using a flammable material, it can be disposed of by simply burning it after use. Similarly, the pre-filter material may be glass fiber or the like in addition to the non-woven fabric, as long as it has a weight-method efficiency of 30 to 98%. Similarly, by using a flammable material, it can be disposed of only by incineration after use.

[0010]

As described above, according to the present invention, since the main filter and the pre-filter are integrated, no complicated mechanism is required for the air conditioner, which is advantageous in terms of cost. Further, according to the present invention, when only the pre-filter is replaced, only the pre-filter may be removed from the pre-filter mounting groove and a new pre-filter may be mounted in the pre-filter mounting groove. Since it is not necessary to remove from the maintenance, maintenance becomes very easy.
Further, according to the present invention, by making the constituent material of the filter a combustible material, the filter can be incinerated and the disposal becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of an air filter according to an embodiment of the present invention.

FIG. 2 is a side view of the air filter in the embodiment.

FIG. 3 is a perspective view when the air filter of the present invention is attached to an air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main filter frame 2 Pre-filter 2A Pre-filter material 2B Pre-filter frame 3A Outer projection 3B Inward projection 4 Pre-filter mounting groove 5 Main filter 10 Air filter

Claims (3)

[Claims] 1. A first projection and a second projection are formed on each of the upper and lower surfaces on the upstream side of a box-shaped filter frame on which a main filter is mounted so as to protrude inward. An air filter, wherein a pre-filter is inserted and mounted by a pair of upper and lower pre-filter mounting grooves formed between the second protrusion and the second protrusion. 2. The air filter according to claim 1, wherein the prefilter holds a prefilter material in a prefilter frame. 3. The air filter according to claim 1, wherein the main filter and the pre-filter are formed of a flammable material.