JPH10156115A - Case structure of filter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a case structure of a filter unit capable of preventing leakage of air from a primary side of the filter unit to a secondary side, with a simple structure and high reliability. SOLUTION: A filter frame 21 for attaching an HEDA filter 3 and a secondary side sideplate 22 are formed into one body by a bending work of a metal plate or welding to constitute an independent secondary side case body 20b, and also a primary side case body 20a constituted of both a ceiling 24 and a primary side sideplate 23 is attached to the secondary side case body 20b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter unit having a HEPA filter for removing air dust, which is used in combination with a temperature control unit for controlling the temperature of air in a clean air conditioner unit installed in a clean room facility. In particular, the present invention relates to a housing structure of the filter unit.

[0002]

2. Description of the Related Art Conventionally, as a clean air conditioner unit installed in a clean room facility for the purpose of temperature control of air in a clean room and dust removal, as shown in FIG.
A clean air conditioner unit is used in which a temperature control unit 1 for adjusting the temperature of air and a filter unit 2 having a HEPA filter 3 for removing air dust are combined.

In this clean air conditioner unit, a packing 4 for preventing air leakage is arranged and connected to a connection portion between the temperature control unit 1 and the filter unit 2, and a secondary side 2b (HEPA filter 3) of the filter unit 2 is provided. Is fixed to the ceiling surface 5 or the like of the clean room via a packing 6 or the like for preventing air from leaking.
The air cooled by the evaporator 11 is sent into the filter unit 2 through the blower 12, and after the dust is removed by the HEPA filter 3, the air is discharged to the clean room. The air in the clean room is usually circulated by a clean air conditioning unit including the temperature control unit 1 and the filter unit 2.

[0004]

The filter unit 2 constituting this clean air conditioner unit
As shown in FIG. 4, a vent 121 is provided at the center so that the HEPA filter 3 disposed inside can be removed from the clean room side when cleaning or replacing.
The hanging bolts 81 and the mounting brackets 8 are inserted into the filter frame 121 formed with a through the packing 31 for preventing air from leaking.
An attachment member 8 including a nut 2 and a nut 83 is detachably attached. The filter frame 121 for mounting the HEPA filter 3 is provided on the inner surface of the side plate 122 of the filter unit housing 120 with the packing 12.
After being fixed by bolts and nuts 124 via the filter 3, the periphery of the filter frame 121 is sealed with a silicone seal 125 in order to prevent air from leaking from the primary side 2 a to the secondary side 2 b of the filter unit 2. Was. Also, on the inner surface of the filter unit housing 120,
The heat insulators 171, 172, 173 were provided.

However, in the conventional filter unit 2, the sealing performance of the packing 123 and the silicon seal 125 depends on the skill of the operator, vibration and distortion during transportation and installation, long-time operation, and the like. With this, the silicon seal 125 is peeled off,
There was a problem that the silicon seal 125 was easily cracked and the reliability of the seal was low.

The present invention has been made in consideration of the above-described problems of the conventional filter unit, and has a simple structure to prevent air from leaking from the primary side to the secondary side of the filter unit with high reliability. It is an object to provide a unit housing structure.

[0007]

In order to achieve the above object, the housing structure of the filter unit according to the present invention comprises a HEP.
The filter frame for attaching the A filter and the secondary side plate were integrated by bending or welding a metal plate to form an independent secondary side housing, and the primary side housing was attached to the secondary side housing. It is characterized by the following.

The filter frame and the secondary side plate are integrated,
Since the independent secondary housing is configured, it is possible to prevent the leakage of air from the primary side to the secondary side of the filter unit with high reliability.

In this case, the upright pieces can be formed by bending the peripheral edge of the vent of the filter frame.

As a result, the rigidity of the filter frame can be increased, and the adhesion between the filter frame and the HEPA filter can be improved.

Further, a heat insulating material can be provided continuously on the outer surfaces of the primary side wall and the secondary side wall.

This facilitates the work of attaching the heat insulating material and prevents the air from leaking to the outside from the gap between the primary side wall and the secondary side wall.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a filter unit according to an embodiment of the present invention;
1 and 2 show an embodiment of the filter unit.
This filter unit 2 is a clean air conditioner unit which is disposed in a clean room facility for the purpose of controlling the temperature of air in a clean room and removing dust, similarly to the conventional filter unit 2 shown in FIG. It is used in combination with a key unit.

The filter unit 2 is provided with a filter frame 21 having a vent 21a formed in the center thereof so that the HEPA filter 3 disposed therein can be removed from the clean room side when cleaning or replacing. Through the packing 31 for preventing air leakage, the suspension bolt 8
1. The mounting member 8 including the mounting bracket 82 and the nut 83 is detachably mounted.

The secondary side plate 22 of the filter unit 2 is integrated with the filter frame 21 to which the HEPA filter 3 is attached by bending or welding a metal plate. The secondary housing 20b is configured. In this case, when manufacturing the secondary side housing 20b, usually, a metal plate in which the secondary side plates 22 are arranged on the four sides of the filter frame 21, respectively, is prepared and bent, and the secondary side plates are formed. A method of welding adjacent edges of the metal frame 22 or a metal plate having secondary side plates 22 arranged on two opposite sides of the filter frame 21 is prepared and bent, and another metal plate is formed. Separate secondary side plates 2 on each side
2, a method of preparing a metal plate to be used as the second side plate and welding the adjacent side edges of the secondary side plate 22 to the filter frame 21 and the secondary side plate 22 can be adopted.

In this case, the rigidity of the filter frame 21 can be increased by bending the periphery of the vent 21a of the filter frame 21 to form the upright piece 21b.

Further, by forming a protruding piece 22a by bending the lower end edge of the side plate 22 on the secondary side, the secondary side housing 2 is formed.
0b can be increased in rigidity. In this case, the projection 22
a is a heat insulating material 71 disposed on an outer surface of a secondary side wall described later.
Can be used as a supporting member.

The primary housing 20a composed of the primary side plate 23 and the top plate 24 is attached to the secondary housing 20b thus configured. The attachment of the primary housing 20a and the secondary housing 20b is performed by using a filter frame 21 or a material such as a packing 25 for preventing air from leaking.
By fixing the primary side plate 23 to the bolts 26 planted on the upper surface of the main body. In addition, a member or a material such as a packing for preventing air from leaking can be provided at the connecting portion between the primary side plate 23 and the top plate 24 as necessary.

The primary side wall 23 and the secondary side wall 2
The heat insulating material 71 is disposed on the outer surface of the top plate 24, and the heat insulating material 72 is disposed on the outer surface of the top plate 24.

According to the housing structure of the filter unit 2, since the filter frame 21 and the secondary side plate 22 are integrated to constitute an independent secondary housing 20b, the HEPA filter 3 is mounted. Except for the vent 21a, the primary side 2a moves from the primary side 2a to the secondary side 2b.
It is possible to eliminate a gap into which the dirty air of a enters, thereby easily preventing the air from leaking from the primary side 2a to the secondary side 2b of the filter unit 2 with high reliability. In addition, this eliminates the need for a conventional silicon seal operation, thereby improving productivity. Also, the primary side wall 23 and the secondary side wall 2
2 was provided with a packing 25 at the connecting portion to prevent air from leaking.
Is arranged, air can be prevented from leaking outside through a gap between the primary side wall 23 and the secondary side wall 22.

[0021]

According to the housing structure of the filter unit of the present invention, since the filter frame and the secondary side plate are integrated to constitute an independent secondary housing, the conventional packing and silicon seal are used. Compared with the filter unit, it is less susceptible to the proficiency of workers, vibration and distortion during transportation and installation, long-time operation, etc., and air leakage from the primary side to the secondary side of the filter unit with high reliability Can be prevented. In addition, since the work of silicon seal is unnecessary,
Productivity can be improved.

Further, by forming a standing piece by bending the periphery of the ventilation hole of the filter frame, the rigidity of the filter frame can be increased, and the adhesion between the filter frame and the HEPA filter can be improved, and the filter unit can be improved. The air leakage from the primary side to the secondary side can be prevented with higher reliability.

Further, by continuously disposing the heat insulating material on the outer surfaces of the primary side wall and the secondary side wall, the work of attaching the heat insulating material is facilitated, so that the productivity can be improved. In addition, it is possible to prevent air from leaking to the outside through a gap between the primary side wall and the secondary side wall.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing one embodiment of a housing structure of a filter unit of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a front sectional view showing an example of a conventional clean air conditioner unit.

FIG. 4 is a front sectional view showing a housing structure of the filter unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature control unit 2 Filter unit 2a Primary side 2b Secondary side 20a Primary side housing 20b Secondary side housing 21 Filter frame 22 Secondary side side plate 23 Primary side side plate 24 Top plate 21a Vent 21b Standing piece 3 HEPA filter 71 Insulation material 72 Insulation material 8 Mounting member

Claims (3)

[Claims] 1. A filter frame on which a HEPA filter is mounted and a side plate on the secondary side are integrated by bending or welding a metal plate to form an independent secondary side housing, and the primary side is attached to the secondary side housing. The housing structure of the filter unit characterized by attaching the side housing. 2. The housing structure of a filter unit according to claim 1, wherein an upright piece is formed by bending a periphery of a vent of the filter frame. 3. The filter unit casing according to claim 1, wherein a heat insulating material is continuously provided on the outer surfaces of the primary side plate and the secondary side plate.