KR20180053821A - Hepa filter box - Google Patents

Abstract

The present invention relates to a HEPA filter box in which the generation of an air vortex is blocked at the lower end edge of a HEPA filter. The HEPA filter box comprises: a casing (1); a bracket (21); a filter frame (29); a gel receiving part fixing frame (39); a filter frame fixing frame (47); a headless bolt (25); a second nut (45); and a third nut (55). A pressure loss of filter passing air by an air vortex and the blockage of an air flow can be minimized.

Description

HEPA FILTER BOX

The present invention relates to a HEPA filter box, and more particularly, to a HEPA filter box which is connected to an air conditioner by a duct and installed in a clean room, and has a HEPA filter therein so as to supply filtered air to the clean room.

HEPA Filter (HEPA: High Efficiency Particulate Air Filter) is made of synthetic fiber material and filters particulate matter contained in the air such as dust, oil, suspended matter, bacteria, virus, etc. of more than 0.3 μm by 99.97% It is used as a filter to keep the clean room air clean. The HEPA filter with this function is housed in the HEPA filter box and installed on the clean room ceiling.

A HEPA filter box for a clean room is disclosed in Published Utility Model Publication No. 20-2010-0000890, Registered Utility Model No. 20-0462527, Registered Patent No. 10-1410946, Registered Utility Model No. 20-0381115, 10-0664720, Registered Utility Model No. 20-0301988, Registered Utility Model No. 20-0401545, and the like. These HEPA filter boxes include various means for sealing between the HEPA filter and the box structure so that the outside air can be introduced into the clean room only through the HEPA filter housed therein. It also includes means for testing the filtration performance of the HEPA filter and the airtightness of the filter box by means of PAO (Poly Alpha Olefin) or DOP (Dioctyl Phthalate) gas.

The bottom of the HEPA filter box is provided with a perforated cover (porous net or perforated plate) at regular intervals from the HEPA filter inside. The perforated cover also has a net effect of dispersing air, but generates a vortex of air at the bottom edge of the HEPA filter, which causes various problems. That is, when a vortex of air is generated at the lower edge of the HEPA filter, the air pressure increases at the edge of the center of the filter and the flow air amount becomes small, so that the air pressure and the flow air amount at the corner of the filter become different. The central portion of the filter is rapidly contaminated and the filter life is shortened because the air communicates intensively. In addition, due to poor air communication at the edge of the filter, foreign substances such as oil fractions and floating matters accumulate on the edge surfaces of the perforated cover and the bottom of the HEPA filter, and bacteria, viruses, and bear caps are inhabited in the accumulated foreign substances .

Public Utility Model Publication No. 20-2010-0000890 (Published Date: Jan. 27, 2010) Registration Utility Model Bulletin No. 20-0462527 (Registration date: 2012. 09. 07) Patent Registration No. 10-1410946 (Registration date: 2014. 06. 17) Registration Utility Model No. 20-0381115 (Registered Date: March 30, 2005) Registered Patent Publication No. 10-0664720 (Registration date: December 27, 2006) Registration Utility Model Bulletin No. 20-0301988 (Registered Date: 2003. 01. 10) Registration Utility Model No. 20-0401545 (Registration date: November 10, 2005)

A first object of the present invention is to prevent the generation of air vapors at the lower edge of the HEPA filter, And to minimize the loss and air flow disturbance.

A second problem to be solved by the present invention is to provide a HEPA filter box which can maintain the air pressure and the flow volume of the filter uniformly at the corner portions of the filter, There is.

A third problem to be solved by the present invention is to prevent accumulation of foreign matter such as oil and floating matter on the edge surface of the lower portion of the HEPA filter and to prevent foreign matter such as bacteria, Filter box.

A fourth problem to be solved by the present invention is to simplify the coupling structure between the HEPA filter frame and the HEPA filter box while effectively maintaining airtightness between the HEPA filter box and the HEPA filter frame, The present invention is directed to providing a HEPA filter box.

The above-described objects of the present invention are achieved by an air purifier comprising: a casing having an air inlet tube attached to an upper portion of a body made of a rectangular cylinder and a lower portion of the body having an opened first opening; An inner horizontal bend extending horizontally from the top to the inside and an inner downward bend extending vertically downward from the inner horizontal bend, a first nut attached to a bottom surface of the inner horizontal bend, And an inner downward bend portion of the channel-type bracket is provided at an upper portion of the upper portion of the channel-type bracket. The channel-type bracket welded along the lower inner peripheral surface of the channel- A gel receiving portion which can be inserted is formed in a channel shape, and a first exposed portion of the HEPA filter is formed so that the inner HEPA filter is exposed on the lower surface A gel receptacle formed with a bolt hole at a position corresponding to the first nut of the channel-type bracket from a lower portion of the filter frame to a lower end of the gel receiving portion, and a second opening coupled to a lower portion of the filter frame, And a bolt hole is formed at a position corresponding to the first nut of the channel-type bracket, and a hole is formed at a position corresponding to the first nut of the channel-type bracket, A filter frame fixing frame in which a second HEPA filter is formed to expose the HEPA filter through the second exposed aperture of the HEPA filter, and an upper part is fastened to the first nut and fastened to the first nut And a portion of the filter frame fixing hole penetrating the bolt hole of the filter receiving frame and the bolt hole of the filter receiving frame, A second nut which is screwed to the tongue bolt at a lower portion of the gel receiving portion fixing frame to closely fix the gel receiving portion fixing frame to the lower surface of the gel receiving portion of the casing, The filter frame fixing frame is tightly fixed to the channel type bracket and the lower end of the filter frame so that the HEPA filter in the filter frame is exposed to the outside through the HEPA filter first exposure hole of the filter frame and the HEPA filter second fixture of the filter frame fixing frame, And a third nut screwed to the lower portion of the filter frame fixing frame of the tongue bolt so as to be exposed to the lower portion of the filter frame.

The above objects of the present invention are accomplished by providing a casing having an air inlet tube attached to an upper portion of a body made of a rectangular cylinder and having a first opening opened at a lower portion of the body, An inner horizontal bend extending horizontally from the top to the inside and an inner downward bend extending vertically downward from the inner horizontal bend, a first nut attached to a bottom surface of the inner horizontal bend, And an inner downward bend portion of the channel-type bracket is provided at an upper portion of the upper portion of the channel-type bracket. The channel-type bracket welded along the lower inner peripheral surface of the channel- The gel receiving portion is formed in a channel shape, which can be partially inserted, and the first exposed portion of the HEPA filter is formed in a shape And a second opening coupled to a lower portion of the filter frame to form a gel hole having a bolt hole formed at a position corresponding to the first nut of the channel bracket from the lower portion of the filter frame to the lower end of the gel receiving portion, And a second exposed portion of the HEPA filter coinciding with the first exposed portion of the HEPA filter of the filter frame is formed so that the second exposed portion of the HEPA filter A filter frame fixing frame in which the HEPA filter is exposed downward through a filter second exposure port and a portion of the filter frame fixing frame which is fastened to the first nut and not fastened to the first nut is passed through a bolt hole of the gel receiving part fixing frame, A tongue bolt extending only to an upper portion of the frame fixing frame; A second nut fixedly attached to the lower surface of the gel receiving portion of the casing so as to be fixed to a position corresponding to the first nut of the channel bracket of the filter frame and magnetically coupled with the filter frame, Type bracket and a lower end of the filter frame to expose the HEPA filter in the filter frame to the outside through the HEPA filter first fixture of the filter frame and the HEPA filter second fixture of the filter frame fixture Which can be solved by a HEPA filter box.

The above objects of the present invention are accomplished by providing a casing having an air inlet tube attached to an upper portion of a body made of a rectangular cylinder and having a first opening opened at a lower portion of the body, An inner horizontal bend extending horizontally from the top to the inside and an inner downward bend extending vertically downward from the inner horizontal bend, a first nut attached to a bottom surface of the inner horizontal bend, And an inner downward bend portion of the channel-type bracket is provided at an upper portion of the upper portion of the channel-type bracket. The channel-type bracket welded along the lower inner peripheral surface of the channel- A portion of the gel accommodating portion which can be inserted is formed into a channel shape, and the first exposed portion of the HEPA filter is formed in a shape And a second opening coupled to the lower portion of the filter frame to form a gel hole having a bolt hole formed at a position corresponding to the first nut of the channel bracket from the lower portion of the filter frame to the lower end of the gel receiving portion, And a second exposed portion of the HEPA filter coinciding with the first exposed portion of the HEPA filter of the filter frame is formed so that the second exposed portion of the HEPA filter A filter frame fixing frame in which the HEPA filter is exposed downward through a filter second exposure port and a portion of the filter frame fixing frame in which an upper portion is fastened to the first nut and is not fastened to the first nut is passed through a bolt hole of the gel receiving portion fixing frame, A tongue bolt extending only to an upper portion of the frame fixing frame, and a fixing member screwed to the tongue bolt at a lower portion of the fixture of the gel receiving portion, A second nut for tightly fixing the fixing frame to the lower surface of the gel receiving portion of the casing, a male clip attached to the filter frame fixing frame, and an arm clip attached to a main body mounting surface of the channel type bracket, Wherein the filter frame fixing frame is tightly fixed to the channel bracket and the lower end of the filter frame by tightening so that the HEPA filter in the filter frame contacts the HEPA filter first exposure hole of the filter frame and the HEPA filter second exposure of the filter frame fixing frame, And a clip set for exposing to the outside through a sphere.

The above objects of the present invention are accomplished by providing a casing having an air inlet tube attached to an upper portion of a body made of a rectangular cylinder and having a first opening opened at a lower portion of the body, An inner horizontal bend extending horizontally from the top to the inside, an inner downward bend extending vertically downward from the inner horizontal bend, and an outer horizontal bend extending horizontally outward from the bottom of the body attachment surface, A channel type bracket to which a first nut is attached, a bolt hole is formed in an outer horizontal bending portion, and a mounting surface of the main body is welded along an inner circumferential surface of a lower end of the casing body; And the inner bottom bend portion of the channel-type bracket is provided at a lower end of the outer periphery with a portion And the lower end of the casing-type bracket and the lower end of the filter frame gel accommodating portion are covered with the outer casing, Shaped bracket and a bolt hole is formed at a position corresponding to the bolt hole of the channel bracket to form a second exposed hole of the HEPA filter coinciding with the first exposed hole of the filter frame, A filter frame fixing frame through which the HEPA filter is exposed downward through the opening of the filter frame, a bolt hole of the channel bracket and a bolt hole of the filter frame fixing frame, Bolt, and the filter frame fixing frame is attached to the channel bracket and the lower end of the filter frame, Wherein the filter frame includes a first exposed portion of the filter frame and a second exposed portion of the filter frame fixed frame so that the HEPA filter in the filter frame is exposed to the outside through the second exposed portion of the filter frame, And a fourth nut to be fastened.

According to the present invention, the perforated cover (porous net or perforated plate) that caused the air vortex in the lower part of the HEPA filter is removed, and the HEPA filter is removed from the HEPA filter first exposure section of the filter frame and the second filter section It is possible to prevent the generation of air vapors at the lower edge of the HAPPA filter and thereby to minimize the pressure loss and the air flow disturbance of the air passing through the filter due to the air eddies, The air pressure and the flow air amount of the filter can be uniformly maintained, thereby preventing the filter center portion from being intensively and quickly contaminated, thereby prolonging the life of the filter.

In addition, according to the present invention, it is possible to prevent accumulation of oil accumulation, accumulation of suspended matters, accumulation of bacteria, and accumulation of pathogenic bacteria caused by air vortex in the bottom edge of the HEPA filter and perforated cover (porous net or perforated plate) It is possible to prevent contamination at the lower edge of the filter and the perforated cover (porous net or perforated plate).

According to the present invention, the coupling structure between the HEPA filter frame and the HEPA filter box casing can be simplified while effectively maintaining airtightness between the casing of the HEPA filter box and the HEPA filter frame, There is an effect.

1 is an exploded cross-sectional view of a HEPA filter box according to a first embodiment of the present invention in an exploded state.
FIG. 2 is a partial enlarged view of an important part of the HEPA filter box shown in FIG. 1; FIG.
FIG. 3 is a cross-sectional view of the HEPA filter box shown in FIG. 1 assembled. FIG.
FIG. 4 is an external perspective view of the HEPA filter box shown in FIG. 1 assembled. FIG.
5 is a cross-sectional view of the HEPA filter box assembled according to the second embodiment of the present invention.
6 is an exploded cross-sectional view of the HEPA filter box according to the third embodiment of the present invention in an exploded state.
FIG. 7 is a partial enlarged view of an important part of the HEPA filter box shown in FIG. 6; FIG.
8 is a cross-sectional view of the HEPA filter box shown in FIG. 6 assembled.
9 is an exploded cross-sectional view of the HEPA filter box according to the fourth embodiment of the present invention in an exploded state.
FIG. 10 is a partial enlarged view of an important part of the HEPA filter box shown in FIG. 9; FIG.
11 is a cross-sectional view of the HEPA filter box shown in FIG. 9 assembled.
12 is an exploded cross-sectional view of the HEPA filter box according to the fifth embodiment of the present invention in an exploded state.
FIG. 13 is a partial enlarged view of an important part of the HEPA filter box shown in FIG. 12; FIG.
FIG. 14 is a cross-sectional view of the HEPA filter box shown in FIG. 12 assembled. FIG.
FIG. 15 is an exploded cross-sectional view of the HEPA filter box according to the fifth embodiment of the present invention in an exploded state; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

≪ Embodiment 1 >

1 to 4 show a first embodiment of a heparin filter box according to the present invention.

As shown in FIGS. 1 and 2, the HEPA filter box according to the first embodiment of the present invention includes a casing 1 provided with a space in which a filter frame 29 can be installed, A filter frame 29 fixed to the casing 1 and a filter frame fixing frame 47 for supporting the lower portion of the filter frame 29; And a channel-type bracket 21 for coupling the casing 1 to the casing 1. The filter frame (29) is provided with a gel receiving portion (33) capable of receiving an airtight holding gel (gel). The gel used as the sealing material is silicone gel or polyurethane gel. A part of the channel-type bracket 21 is welded to the casing 1 and the end portion is recessed into the gel of the gel accommodating portion 33 so that unfiltered air leaks between the casing 1 and the filter frame 29 Clearly block. The HEPA filter box according to the first embodiment of the present invention includes a gel receiving part fixing frame 39 capable of supporting the lower portion of the gel receiving part 33.

In the casing 1, an air injection pipe 5 connected to a duct of an air conditioner or the like is attached to an upper portion of a main body 17 made of a rectangular cylinder. As shown in FIGS. 1 and 4, a damper 6 is provided in the air injection pipe 5, and the damper 6 is connected to the outside of the air injection pipe 5 to adjust the inflow amount of air by moving the damper A damper handle 7 is provided. In the interior of the main body 17 connected to the air injection pipe 5, a perforated pipe 9 having a plurality of through holes and a perforated plate 11 having a plurality of through holes are provided. The other porous pipe (9) and the perforated plate (11) serve to diffuse the introduced air without concentrating on the central part. A heat insulating material (19) is wrapped around the casing body (17) to prevent the temperature change of the inflow air. A PAO (poly-alpha-olefin) inlet 13 and a PAO outlet 15 are formed in the casing main body 17 and the heat insulating material 19 for the purpose of checking the filtration performance of the HEPA filter and the hermeticity of the filter box. The PAO inlet port 13 and the PAO outlet port 15 are opened only when the filtration performance inspection of the HEPA filter and the filter box airtight inspection are performed and when the conventional HEPA filter is used, it is closed. The casing 1 is connected to the building slab by hangers 3 formed on the upper portion of the main body 17 and hangs on the top of the ceiling board 100. Only the filter frame fixing frame 47 is exposed to the lower portion of the ceiling board 100 do.

As shown in FIGS. 1 and 2, the channel-type bracket 21 is formed by bending a large number of narrow and long plate members to form an inner horizontal surface (c) extending horizontally inward from the upper surface of the main body attachment surface A first nut 23 is attached to a bottom surface of the inner horizontal bent portion b and an inner downward bent portion a extending vertically downward from the inner horizontal bent portion b is formed on the bent portion b and the inner horizontal bent portion b, The body attachment surface (c) is welded along the lower end inner circumferential surface of the casing body (17). The outer horizontal bending portion d and the outer horizontal bending portion d which are bent outward from the lower end of the body attachment surface c of the channel type bracket 21, It is preferable that an outer upwardly bent portion e upwardly bent from the front end is further formed. At this time, the outer upper bent portion (e) surrounds the outer side of the lower end of the heat insulating material (19).

The filter frame 29 is a rectangular tubular body that can be inserted into the lower first opening 27 of the casing 1. The filter frame 29 accommodates a HEPA filter therein and has a channel- A gel receiving portion 33 into which the inner downward bent portion a of the inner lower bent portion a can be partially inserted is formed in a channel shape and a first exposed hole 37 of the HEPA filter is formed on the lower surface so that the HEPA filter therein is exposed .

The gel receiving submerged fixture 39 has a second opening 43 connected to the lower portion of the filter frame 29 and inserted from below the filter frame 29 to the lower end of the gel receiving portion 33 , And a bolt hole (41) is formed at a position corresponding to the first nut (23) of the channel type bracket (21).

The filter frame fixing frame 47 is a rectangular plate shaped plate having an outer width in which both the casing 1 and the lower end of the channel type bracket 21 are covered and the first nut 23 of the channel type bracket 21 And a second exposing hole 51 is formed in the filter frame 29 to coincide with the first exposing hole 37 of the filter frame 29, 2 exposing port 51 to expose the HEPA filter downward. As shown in FIGS. 1 and 2, it is preferable that the filter frame fixing frame 47 is formed so as to completely cover the channel-type bracket 21 by forming a rim 53 at the edge thereof.

The upper part of the HEPA filter box according to the first embodiment of the present invention is fastened to the first nut 23 of the channel type bracket 21 and the portion not fastened to the first nut 23, A tundish bolt 25 which penetrates the bolt hole 41 of the fixed frame and the bolt holes 49 of the filter frame fixing frame 47 and extends to the lower portion of the casing 1 and the filter frame fixing frame 47 and is exposed to the outside, A second nut 32 screwed to the tongue bolt 25 at the lower portion of the gel receiving submerged fixture 39 to fix the gel receiving submerged fixture 39 to the lower surface of the gel accommodating portion 33 of the casing 1, (45) and the filter frame fixing frame (47) are tightly fixed to the lower ends of the casing (1) and the filter frame (29) so that the HEPA filter in the filter frame (29) The first exposure port 37 and the HEPA filter second exposure port 51 of the filter frame fixing frame 47 can be exposed to the outside The lock includes a third nut 55 is screw fastened to the filter frame flange 47, the lower projecting portion of the tannery bolt (25).

As described above, one of the features of the present invention is that the HEPA filter in the filter frame 29 is connected to the HEPA filter first exposure port 37 of the filter frame 29 and the HEPA filter second And is exposed to the outside through the exposure port 51. [ Through this, the filtered air passing through the HEPA filter is directly injected into the clean room without interference by the perforated cover (porous net or perforated plate). Therefore, the generation of air vortices at the lower edge of the HEPA filter can be prevented from origin, the pressure loss of the air passing through the filter due to the air vortex and the air flow disturbance can be minimized, and the air pressure and the flow volume of the filter are uniformly maintained So that the central portion of the filter is prevented from being intensively and quickly contaminated, and the life of the filter can be prolonged. Also, accumulation of oil in the bottom edge of the HEPA filter and the perforated cover (porous net or perforated plate) that may occur when perforated cover (porous net or perforated plate) is used, accumulation of suspended solids, accumulation of bacteria, A filtering air can be prevented from being contaminated at the bottom edge of the HEPA filter and the perforated cover (porous net or perforated plate).

Another feature of the present invention is that the channel type bracket 21 welded to the casing 1, the gel receiving stationary fixture 39 and the filter frame fixture 47 are arranged in a single trough And the nuts 45 and 55 are fastened to the bolts 25 and fixed. Therefore, while the airtightness between the casing 1 of the HEPA filter box and the HEPA filter filter frame 29 is effectively maintained, the coupling structure between the HEPA filter frame 29 and the casing 1 of the hopper filter box is simplified, And the filter can be exchanged quickly.

≪ Embodiment 2 >

5 shows a second embodiment of the HEPA filter box according to the present invention. The second embodiment differs from the first embodiment in that the edge wall 53 of the filter frame fixing frame 47 of the outer upper bend portion e of the channel bracket 21 is not formed and the outer horizontal bend portion d The ceiling board 100 can be installed on the upper surface.

≪ Third Embodiment >

6 to 8, the casing 1 of the HEPA filter box according to the third embodiment of the present invention, the channel-type bracket 21, the filter frame 29, 39 and the second nut 45 for fixing it are the same in structure and function as those in the first embodiment.

6 to 8, the third embodiment is characterized in that the casing 1 is a rectangular plate-like plate material having an outer width which covers both the lower ends of the channel-type bracket 21, The second filter 51 is formed so as to coincide with the first exposed portion 37 of the HEPA filter 29 of the second filter portion 29 and the HEPA filter is exposed downward through the second exposed portion 51 of the HEPA filter 51, Shaped bracket 21 and an upper portion of the channel-type bracket 21 is fastened to the first nut 23 of the channel-type bracket 21 and the portion of the first nut 23 not fastened to the bolt hole 41 of the gel- And is attached and fixed at a position corresponding to the first nut 23 of the channel type bracket 21 of the filter frame fixing frame 47 so as to be fixed to the filter frame fixing frame 47, (1) and the filter frame (29) at the lower end of the filter frame fixing frame (47) The HEPA filter in the filter frame 29 is tightly fixed to the outside through the HEPA filter first exposure port 37 of the filter frame 29 and the HEPA filter second exposure port 51 of the filter frame fixture 47 And a magnet 57 for allowing the magnet 57 to be exposed. In the third embodiment, since the tongue bolt 25 is not exposed under the filter frame fixing frame 47, the tongue bolt 25 is shorter in length than in the first embodiment.

7 and 8, the lower surface of the magnet 57 is attached to the filter frame fixing frame 47, and the upper surface of the magnet 57 is detachably attached to the lower end of the tongue bolt 25 by the operation of the operator. A recess 58 is formed in the upper surface of the magnet 57 to receive the lower end of the tongue bolt 25 so that a contact area between the tongue bolt 25 and the groove 58 is increased by a magnetic force. The tongue bolt 25 and the filter frame fixing frame 47 are attached by the strong magnetic force so that the filter frame fixing frame 47 does not easily detach.

With this structure, the operator can easily attach and detach the filter frame fixing frame 47 to the casing 1 under the filter frame fixing frame 47.

<Fourth Embodiment>

9 to 11, a casing 1, a channel-type bracket 21, a filter frame 29, a gel receiving part fixing frame (not shown) of a heparaphragm box according to a fourth embodiment of the present invention 39 and the second nut 45 for fixing it are the same in structure and function as those in the first embodiment.

9 to 11, the feature of the fourth embodiment is a rectangular plate-like plate material having an outer width in which both the casing 1 and the lower end of the channel-type bracket 21 are covered, The second filter 51 is formed so as to coincide with the first exposed portion 37 of the HEPA filter 29 of the second filter portion 29 and the HEPA filter is exposed downward through the second exposed portion 51 of the HEPA filter 51, Shaped bracket 21 and an upper portion of the channel-type bracket 21 is fastened to the first nut 23 of the channel-type bracket 21 and the portion of the first nut 23 not fastened to the bolt hole 41 of the gel- A tongue bolt 25 extending to the upper part of the filter frame fixing frame 47 and a male clip 59a attached to the upper surface of the filter frame fixing frame 47; And by the engagement of the arm clip 59b and the male clip 59a, The hatch filter 47 is tightly fixed to the lower ends of the casing 1 and the filter frame 29 so that a HEPA filter in the filter frame 29 is exposed to the first and second exposed parts 37 and 37 of the filter frame 29, And a clip set (59a, 59b) for exposing the filter frame fixed frame (47) to the outside through a second exposure aperture (51) of the HEPA filter. In the fourth embodiment, since the tongue bolt 25 is not exposed under the filter frame fixing frame 47, its length is shorter than in the first embodiment.

As shown in FIGS. 10 and 11, the arm clip 59b is formed in a leaf spring shape having a triangular cross section, and the male clip 59a is formed of an elastic body having a rhomboid cross section which is engaged with the male clip 59a. Accordingly, when they are combined, the filter frame fixing frame 47 is fastened with a strong elastic force, and the filter frame fixing frame 47 does not easily detach.

<Fifth Embodiment>

12 to 14, the HEPA filter box according to the fifth embodiment of the present invention is characterized in that an air injection pipe 5 is attached to an upper part of a body 17 made of a rectangular tube, A casing 1 in which a first opening 27 having an opened lower portion is formed and a plurality of narrow and long plate members which are bent to form an inner horizontal bend extending horizontally inward from a top surface of the main body attachment surface c, an inner downward bent portion a extending vertically downward from the inner horizontal bending portion b and an outer horizontal bending portion d extending horizontally outward from the lower end of the main body attaching surface c are formed A bolt hole 67 is formed in the outer horizontal bend portion d and the attachment surface c of the main body is attached to the lower end of the casing main body 17, A channel type bracket 21 welded along the inner circumferential surface of the casing 1 and a rectangular tube body which can be inserted and installed in the lower first opening 27 of the casing 1, A gel accommodating portion 33 is formed at the lower end of the outer periphery of the channel type bracket 21 so that the inner downward bent portion a of the channel type bracket 21 can be partially inserted into the upper portion, The filter frame 29 in which the HEPA filter first exposure port 37 is formed and the lower end of the casing 1 and the channel bracket 21 and the filter frame gel receiving portion 33 are all covered A bolt hole 49 is formed at a position corresponding to the bolt hole 67 of the channel type bracket 21 and a first exposed portion of the HEPA filter of the filter frame 29 A filter frame fixing frame 47 in which a second HEPA exposing port 51 is formed to expose the HEPA filter through the second exposure port 51 and the channel type bracket 21 And the bolt holes 49 of the filter frame fixing frame 47 are moved downward from above A hexagonal bolt 63 penetrating through the filter frame fixing frame 47 and extending to a lower portion of the filter frame fixing frame 47 and exposed to the outside and a frame frame 47 fixed to the lower ends of the channel bracket 21 and the filter frame 29 So that the HEPA filter in the filter frame 29 is exposed to the outside through the HEPA filter first exposure port 37 of the filter frame 29 and the HEPA filter second exposure port 51 of the filter frame fixture 47 And a fourth nut 65 screwed to the lower protruding portion of the filter frame fixing frame 47 of the hexagonal bolt 63 so as to be exposed. The HEPA filter box according to the fifth embodiment can remove the other pipe and the perforated plate of the first embodiment. Also, the HEPA filter box according to the fifth embodiment shows that the arrangement of the PAO injection pipe 13 and the PAO discharge pipe 15 can be changed. In addition, the HEPA filter box according to the fifth embodiment shows that the bottom surface of the gel receiving portion 33 and the bottom end of the filter frame 29 can be matched. The HEPA filter box according to the fifth embodiment is characterized in that a bolt hole 67 is formed in the outer horizontal bend portion d of the channel type bracket 21 and a hexagonal bolt 63 is fastened thereto, So that the frame 29 can be assembled.

<Sixth Embodiment>

As shown in Fig. 15, in the sixth embodiment, in the fifth embodiment, the additional porous pipe 9 and the perforated plate 11 are further added and the PAO injection pipe 13 and the PAO discharge pipe 15 are all connected to the other pipe 9 ). &Lt; / RTI &gt; In addition, the sixth embodiment shows that the rim wall 53 can be removed from the filter frame 29 of the fifth embodiment.

In the second to sixth embodiments, a HEPA filter in the filter frame 29 is connected to the HEPA filter first exposure port 37 of the filter frame 29 and the HEPA filter second And is exposed to the outside through the exposing port 51. Through this, the filtered air passing through the HEPA filter is directly injected into the clean room without interference by the perforated cover (porous net or perforated plate). Therefore, the generation of air vortices at the lower edge of the HEPA filter can be prevented from origin, the pressure loss of the air passing through the filter due to the air vortex and the air flow disturbance can be minimized, and the air pressure and the flow volume of the filter are uniformly maintained So that the central portion of the filter is prevented from being intensively and quickly contaminated, and the life of the filter can be prolonged. Also, accumulation of oil in the bottom edge of the HEPA filter and the perforated cover (porous net or perforated plate) that may occur when perforated cover (porous net or perforated plate) is used, accumulation of suspended solids, accumulation of bacteria, A filtering air can be prevented from being contaminated at the bottom edge of the HEPA filter and the perforated cover (porous net or perforated plate).

Even in the case of the second to sixth embodiments, the airtightness between the casing 1 of the HEPA filter box and the HEPA filter filter frame 29 is effectively maintained, The coupling structure between the casings 1 is simplified and the filter installation and the filter replacement can be performed quickly.

1: casing 3: hanger
5: air inlet tube 6: damper
7: damper handle 9:
11: perforated plate 13: PAO inlet
15: PAO outlet port 17: casing body
19: Insulating material 21: Channel type bracket
23: Nut 25: Tongue bolt
27: first opening 29: filter frame
31: frame side 32: frame bottom side
33: Gel receiving part 35: Gel
37: HEPA filter first exposure port 39: Gel receiving port fixture
41: bolt hole 43: second opening
45: bolt 47: filter frame fixture
49: Bolt hole 51: Hepa filter 2nd exposure hole
53: rim wall 55: third nut
57: magnet 58: groove
59a, 59b: clip set 61: washer
63: Hex bolt 65: Fourth nut
67: Bolt hole

Claims (4)

An air injection pipe (5) is attached to an upper portion of a body (17) made of a rectangular cylinder, and a lower portion of the body (17) has a casing (1) having an opened first opening (27);
A plurality of narrow and long plate members are folded to form an inner horizontal bend portion b extending horizontally inward from the upper end of the main body attachment surface c and a body attachment surface c and an inner horizontal bend portion b extending vertically downward from the inner horizontal bend portion b A first nut 23 is attached to the lower surface of the inner horizontal bent portion b and the body attachment surface c is welded along the lower end inner peripheral surface of the casing body 17 A channel type bracket 21;
And a lower half portion of the channel type bracket 21 is formed in the outer periphery of the inner lower folded portion a of the channel type bracket 21, A filter frame 29 having a first receiving aperture 37 for exposing an internal HEPA filter;
A second opening 43 is formed at a lower portion of the filter frame 29 so as to be inserted from below the filter frame 29 to the lower end of the gel accommodating portion 33, 1) a gel receiving stationary fixture 39 in which a bolt hole 41 is formed at a position corresponding to the nut 23;
The bracket 21 is formed in a rectangular plate shape having an outer width in which both the casing 1 and the lower end of the channel bracket 21 are covered. A second exposure aperture 51 is formed in the filter frame 29 so as to coincide with the first exposure aperture 37 of the filter frame 29 and is exposed through the second exposure aperture 51 of the HEPA filter A filter frame fixing frame 47 in which the HEPA filter is exposed downward;
The upper part is fastened to the first nut 23 and the part not fastened to the first nut 23 is fastened to the bolt hole 41 of the gel receiving part fixing frame and the bolt hole 49 of the filter frame fixing frame 47 A tundra bolt (25) penetrating and extending to a lower portion of the casing (1) and the filter frame fixing frame (47) and exposed to the outside;
A second nut (not shown) is screwed into the tongue bolt 25 at the lower portion of the gel receiving sub-assembly 39 to closely contact the gel receiving sub-assembly 39 with the lower surface of the gel receiving portion 33 of the casing 1 45);
The filter frame fixing frame 47 is tightly fixed to the lower ends of the channel bracket 21 and the filter frame 29 so that the HEPA filter in the filter frame 29 is exposed to the HEPA first exposure Is fastened to the lower protruding portion of the filter frame fixing frame 47 of the tongue bolt 25 so as to be exposed to the outside through the hole 37 and the second exposed portion 51 of the filter frame fixing frame 47 And a third nut (55).
An air injection pipe (5) is attached to an upper portion of a body (17) made of a rectangular cylinder, and a lower portion of the body (17) has a casing (1) having an opened first opening (27);
A plurality of narrow and long plate members are folded to form an inner horizontal bend portion b extending horizontally inward from the upper end of the main body attachment surface c and a body attachment surface c and an inner horizontal bend portion b extending vertically downward from the inner horizontal bend portion b A first nut 23 is attached to the lower surface of the inner horizontal bent portion b and the body attachment surface c is welded along the lower end inner peripheral surface of the casing body 17 A channel type bracket 21;
And a lower half portion of the channel type bracket 21 is formed in the outer periphery of the inner lower folded portion a of the channel type bracket 21, A filter frame 29 having a first receiving aperture 37 for exposing an internal HEPA filter;
A second opening 43 is formed at a lower portion of the filter frame 29 so as to be inserted from below the filter frame 29 to the lower end of the gel accommodating portion 33, 1) a gel receiving stationary fixture 39 in which a bolt hole 41 is formed at a position corresponding to the nut 23;
The casing 1 and the channel type bracket 21 are all covered with a rectangular plate having an outside width and a hap filter (not shown) coinciding with the first exposed portion 37 of the HEPA filter of the filter frame 29, A filter frame fixing frame 47 formed with a second exposed hole 51 and exposing the HEPA filter downward through the second exposed hole 51 of the HEPA filter;
The upper portion is fastened to the first nut 23 and the portion not fastened to the first nut 23 passes through the bolt hole 41 of the gel receiving portion fixing frame and extends only to the upper portion of the filter frame fixing frame 47 Tongue bolts 25;
A second nut (not shown) is screwed into the tongue bolt 25 at the lower portion of the gel receiving sub-assembly 39 to closely contact the gel receiving sub-assembly 39 with the lower surface of the gel receiving portion 33 of the casing 1 45);
Is fixedly attached to the filter frame fixing frame 47 at a position corresponding to the first nut 23 of the channel bracket 21 and the filter frame fixing frame 47 is fixed to the channel bracket 21 with a magnetic force, And a lower end of the filter frame 29 so that a HEPA filter in the filter frame 29 is connected to the HEPA filter first exposure port 37 of the filter frame 29 and the HEPA filter of the filter frame fixture 47 And a magnet (57) for allowing the second exposed portion (51) to be exposed to the outside.
An air injection pipe (5) is attached to an upper portion of a body (17) made of a rectangular cylinder, and a lower portion of the body (17) has a casing (1) having an opened first opening (27);
A plurality of narrow and long plate members are folded to form an inner horizontal bend portion b extending horizontally inward from the upper end of the main body attachment surface c and a body attachment surface c and an inner horizontal bend portion b extending vertically downward from the inner horizontal bend portion b A first nut 23 is attached to the lower surface of the inner horizontal bent portion b and the body attachment surface c is welded along the lower end inner peripheral surface of the casing body 17 A channel type bracket 21;
And a lower half portion of the channel type bracket 21 is formed in the outer periphery of the inner lower folded portion a of the channel type bracket 21, A filter frame 29 having a first receiving aperture 37 for exposing an internal HEPA filter;
A second opening 43 is formed at a lower portion of the filter frame 29 so as to be inserted from below the filter frame 29 to the lower end of the gel accommodating portion 33, 1) a gel receiving stationary fixture 39 in which a bolt hole 41 is formed at a position corresponding to the nut 23;
The casing 1 and the channel type bracket 21 are all covered with a rectangular plate having an outside width and a hap filter (not shown) coinciding with the first exposed portion 37 of the HEPA filter of the filter frame 29, A filter frame fixing frame 47 formed with a second exposed hole 51 and exposing the HEPA filter downward through the second exposed hole 51 of the HEPA filter;
The upper portion is fastened to the first nut 23 and the portion not fastened to the first nut 23 passes through the bolt hole 41 of the gel receiving portion fixing frame and extends to the upper portion of the filter frame fixing frame 47 Tongue bolts 25;
A second nut (not shown) is screwed into the tongue bolt 25 at the lower portion of the gel receiving sub-assembly 39 to closely contact the gel receiving sub-assembly 39 with the lower surface of the gel receiving portion 33 of the casing 1 45);
A male clip 59a attached to the filter frame fixing frame 47 and an arm clip 59b attached to a main body attaching surface c of the channel bracket 21, The filter frame fixing frame 47 is tightly fixed to the lower ends of the channel bracket 21 and the filter frame 29 by fastening the clip 59a so that the HEPA filter in the filter frame 29 is fixed to the filter frame 29 And a clip set (59a, 59b) for externally exposing the HEPA filter through the second exposure port (51) of the filter frame fixing frame (47) and the HEPA filter first exposure port (37) box.
An air injection pipe (5) is attached to an upper portion of a body (17) made of a rectangular cylinder, and a lower portion of the body (17) has a casing (1) having an opened first opening (27);
A plurality of narrow and long plate members are folded to form an inner horizontal bend portion b extending horizontally inward from the upper end of the main body attachment surface c and a body attachment surface c and an inner horizontal bend portion b extending vertically downward from the inner horizontal bend portion b And a first nut 23 is attached to the lower surface of the inner horizontal bend portion b and the outer horizontal bend portion d horizontally extending outward from the lower end of the main body attachment surface c is formed And a bolt hole (67) is formed in the outer horizontal bend (d), and the main body attachment surface (c) is welded along the lower end inner peripheral surface of the casing main body (17);
And a lower half of the outer periphery of the channel-type bracket 21 is inserted into the lower first opening 27 of the casing 1, a filter frame 29 having a gel receiving part 33 into which a part of the gel receiving part a can be inserted is formed in a channel shape and a HEPA filter first exposure port 37 is formed on a bottom surface of the gel receiving part 33 to expose the HAP filter therein;
The channel type bracket 21 and the filter frame gel accommodating portion 33 are covered with the casing 1 and the channel frame type bracket 21 and the lower end of the filter frame gel accommodating portion 33 is covered with the bolt hole 67 And a second exposing hole 51 is formed in the filter frame 29 to coincide with the first exposing hole 37 of the filter frame 29, 2 filter frame fixing frame 47 in which the HEPA filter is exposed downward through the exposing port 51;
The bolt hole 67 of the channel type bracket 21 and the bolt hole 49 of the filter frame fixing frame 47 are passed downward from the upper side to the lower side of the filter frame fixing frame 47, (63);
The filter frame fixing frame 47 is tightly fixed to the lower ends of the channel bracket 21 and the filter frame 29 so that the HEPA filter in the filter frame 29 is exposed to the HEPA first exposure Is fastened to the lower protruding portion of the filter frame fixing frame 47 of the hexagonal bolt 63 so as to be exposed to the outside through the hole 37 and the second exposed portion 51 of the filter frame fixing frame 47 And a fourth nut (65).

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