JPH0414096Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an air filter unit.

(Prior art) Conventionally, in order to provide a clean air blowing ceiling for a clean room, an air filter unit is airtightly installed on an air filter unit mounting frame installed horizontally on the ceiling side, and the internal space of the filter mounting frame is closed. The top surface is hermetically closed with an air filter to serve as a clean air outlet. More specifically, as shown in Figure 4, the air filter unit C is airtightly mounted on the top surface of the filter mounting frame A horizontally installed on the ceiling side of the room via a sealant B such as silicone grease. It constitutes a ceiling for blowing out air, and the air filter unit C
The filter frame E on the outer periphery of the air filter D and the annular packing G having a sealing material filling groove F formed around the entire circumference of the mounting surface are connected to their respective flat opposing surfaces e and g.
These facing surfaces e and g are fixed together via an adhesive H applied between them.

(Problems to be Solved by the Invention) The conventional structure of the above-mentioned clean air blowing ceiling of the clean room consists of the air filter unit mounting frame A and the annular packing G of the air filter unit C placed on the upper surface of the air filter unit mounting frame A. Since there is a sealing material B filled in the groove F of the annular packing G between the two, contaminated air on the upstream side of the air filter D passes between the mounting frame A and the annular packing G. However, there is no leakage to the downstream side of the air filter D, that is, to the outlet side, that is, into the room, although the annular packing G of the air filter unit C and the filter frame E are fixed with adhesive H. ,
It is often seen that contaminated air passes between these and leaks to the outlet side of the air filter D.
Therefore, as shown in the fourth figure, after installing the air filter unit C on the upper surface of the air filter unit mounting frame A, the annular packing G and the filter frame E are attached to the inner peripheral surface of the air filter C from the air outlet side. A sealing material 5 is applied across the adhesion facing surfaces via adhesive H to ensure airtightness between them.
Such additional sealing work is troublesome. Basically, it is desirable that the opposing surfaces of the filter frame and packing can be airtightly bonded by the fixing operation.

(Means for Solving the Problems) The present invention provides an air filter unit that can satisfy the above requirements, and includes a filter frame and an annular packing on the outer periphery of the air filter that are arranged between the filter frame and the annular packing on their respective opposing surfaces. In the air filter unit, a convex or grooved strip is provided on the opposite surface of the annular packing side of the filter frame, and a convex or grooved strip is provided on the opposite surface of the annular packing side of the filter frame. A concave line or convex line corresponding to the convex line or concave line is provided, the filter frame and the annular packing are brought into contact with each other, and an adhesive is applied between the convex line and both opposing surfaces excluding the concave line. The filter frame and the annular packing are fixed by a combination of pressure bonding and sealing with a sealing material applied between the fitting surfaces of the protrusions and the grooves.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

Figures 1 and 2 show one embodiment of the present invention, in which the air filter unit 1 of the present invention is used to construct a blowout ceiling of a clean air room, and 2 is made of a metal hard synthetic material. Showing the air filter unit mounting frame made of resin material etc.
It is installed horizontally in the ceiling space of the room. This mounting frame 2
The filter unit 1 of the present invention is placed on the top surface with a sealing material 3 made of a substance 3 that has a viscosity that does not naturally flow out and does not solidify, such as silicone oil or silicone grease, to form a ceiling for blowing clean air in a clean room. Configure. The air filter unit 1 includes an air filter 4, a filter frame 5 made of a metal or synthetic resin material, which is airtightly fixed to the outer peripheral surface of the air filter 4, and an annular frame made of rubber or the like which is bonded to the filter frame 5 via an adhesive 6. A concave groove 8 for filling the sealing material formed around the entire circumference of the surface of the packing 7 that is placed on the upper surface of the mounting frame 2.
This is different from the conventional method in that the air filter unit 1 is filled with the sealing material 3 in advance and placed on the upper surface of the filter mounting frame 2 with its mounting surface facing downwards in an airtight manner via the filled sealing material 3. do not have.

In the illustrated example of FIGS. 1 and 2, one concave strip 10 having a rectangular cross section is formed on the center line in the width direction on the opposing surface 5a of the filter frame 5 on the annular packing 7 side; One protruding strip 9 having a rectangular cross section is formed on the opposing surface 7a on the side of the filter frame 5 to fit into the grooved strip 10. Further, as shown in FIG. 2, with the grooved line 10 of the filter frame 5 facing downward, adhesive 6 is applied to each of the flat facing surfaces 5a on both sides excluding the grooved line 10, and the inside of the grooved line 10 is A sealing material 11 was filled. The opposing surface 5a of the filter frame 5 and the opposing surface 7 of the annular packing 7
A are brought into contact with each other, and both opposing surfaces 5a and 7a, excluding the protruding line 9 and the concave line 10, are pressed and bonded with the adhesive 6 applied between them, and the protruding line 9 and the concave line 10 are fitted together to form both sides. Sealing material 11 applied between the grooves on the mating surface 10 of the grooves
A and 9a are sealed, and the filter frame 5 and the annular packing 7 are combined by the press binding and the sealing.
was fixed.

In this case, a part of the sealing material 11 filled in the groove 10 in advance is pushed out to both sides,
The concave and convex strip fitting surfaces 10a and 9a and both sides thereof are sealed, and the filter frame 5 and the annular packing are combined by pressure bonding with adhesive on both opposing surfaces of the filter frame and the annular packing and sealing of the concave and convex strip mating surfaces. 7, as well as good adhesion between both members, and overall the adhesion length and area between the opposing surfaces 5a and 7a are reduced by the conventional flatness by only the uneven fitting surfaces 10a and 9a. The adhesive 6 applied between the flat opposing surfaces 5a and 7a on both sides is Together with the pressure bonding, this produces a mutual effect such as blocking the passage of contaminated air between the two members on the upstream side, thereby significantly increasing the sealing effect compared to the conventional method. Along with this, in order to ensure sealing performance with conventional flat facing surfaces, it was necessary to take the time and careful consideration to apply the adhesive evenly and evenly. Even if there is uneven application, good sealing performance can be ensured by intervening the sealant at the fitting portion of the uneven stripes, and the adhesive application work can be done easily and quickly.

FIG. 3 shows another embodiment, in which the protrusions 9 and grooves 10 provided on the opposing surfaces of the filter frame 5 and the annular packing 7 are reversed. Third
The operation and effect of the illustrated example are the same as those of the illustrated example of FIGS. 1 and 2 above. The sealing material 11 may be the same material applied between the annular packing 7 and the air filter mounting frame 2, such as silicone oil or silicone grease.

(Effect of the invention) According to the present invention, one protruding or grooved strip is provided on the opposite surface of the filter frame of the air filter unit on the annular packing side, and the A grooved line or a convex line corresponding to the convex line or concave line is provided, the filter frame and the annular packing are brought into contact with each other, and an adhesive is applied between the convex line and the opposing surfaces excluding the concave line. The filter frame and the annular packing are fixed by a combination of pressure bonding and sealing with a sealing material applied between the uneven fitting surfaces of the convex strip and the concave strip. Simply place it on the air filter unit mounting frame via the sealant.
The opposing surfaces on both sides of the filter frame excluding the concave or convex stripes are pressed and bonded to the annular packing, and the concave and convex strip mating surfaces are sealed, and the synergistic effect of the combination of pressure bonding and sealing prevents contaminated air from being trapped. A ceiling for blowing out clean air that does not leak at all from the mutually fixed portion between the filter frame and the annular packing can be constructed, and the air filter unit of the present invention can be manufactured and installed easily. have

[Brief explanation of drawings]

FIG. 1 is a cutaway side view of a clean air blowing section equipped with an air filter unit according to an example of the present invention;
Fig. 2 is an exploded perspective view from below with a portion of the air filter unit cut away, Fig. 3 is a partially cutaway side view of another embodiment, and Fig. 4 is a clean air filter equipped with a conventional air filter unit. A cutaway side view of the air blowing section is shown. 1...Air filter unit, 4...Air filter, 5...Filter frame, 6...Adhesive, 7...
Annular packing, 5a, 7a...opposite surface, 9...
Convex strip, 10... Concave strip, 9a, 10a... Concave and convex strip fitting surface, 11... Sealing material.

Claims (1)

[Scope of utility model registration request] In an air filter unit in which a filter frame and an annular packing on the outer periphery of the air filter are fixed to each other through an adhesive applied between them on their respective opposing surfaces, a single strip is formed on the opposing surface of the filter frame on the annular packing side. A convex or concave line is provided, a concave or convex line corresponding to the convex or concave line is provided on the opposite surface of the annular packing on the filter frame side, and the filter frame and annular packing are brought into contact with each other to form the convex line. The filter can be fixed by pressing the adhesive between the strips and both opposing surfaces excluding the grooves, and sealing with a sealing material between the convex strips and the mating surfaces of the grooves. An air filter unit formed by firmly fixing a frame and the annular packing.