JP6633463B2 - Air filter device - Google Patents

Description

  The present invention relates to an air filter device capable of mounting and removing a filter from a downstream side.

  In a general air conditioner, a mounting frame is provided for each filter, and maintenance such as filter replacement has to be performed from the upstream side (air inflow side) of the intake duct due to its structure. That is, in a normal filter mounting frame, first, a medium-performance filter is installed, a holding frame is installed on the upstream front surface, tightened with bolts, and finally, a pre-filter is installed on the upstream front surface. In this case, performing maintenance from the downstream side (air outflow side) cannot secure a space for inserting the pre-filter, and thus it is difficult to perform maintenance from the downstream side.

Therefore, it was necessary to provide a maintenance space on the upstream side. However, the maintenance space on the upstream side has a problem in the working environment because it is contaminated by the inflowing outside air, and also has a problem in that the area for generating rust or the like increases because a relatively large space is required.
Furthermore, since one mounting frame is required for each filter, when filters are installed in a plurality of rows and a plurality of stages in general air conditioning for large air volume processing, it is necessary to perform a filter replacement operation for each mounting frame. Yes, it was complicated.

On the other hand, Patent Document 1 describes a gas turbine intake filter unit in which a primary filter layer, a secondary filter layer, and a tertiary filter layer are sequentially arranged from the upstream side in an intake duct. It describes that in this filter unit, a space is provided between the secondary filter layer and the tertiary filter layer, and the filter constituting the tertiary filter layer can be replaced (paragraph [0011]).
However, there is no description about replacing the filters constituting the primary filter layer and the secondary filter layer from the downstream side in the intake duct.

Patent Literature 2 discloses an intake filter including a pre-filter and a high-performance filter, and a maintenance space provided between them. The pre-filter can be replaced by entering the maintenance space. Is described.
However, since the maintenance space is provided between the pre-filter and the high-performance filter, the replacement of the high-performance filter is performed on the upstream side, and the above-described problem of the working environment and the like occurs.

Japanese Patent No. 4532224 JP-A-8-257329

  A main object of the present invention is to provide an air filter device capable of replacing a filter from a downstream side without providing a maintenance space on an upstream side.

  In the air filter device of the present invention, a filter holding frame having a built-in filter, and a recess accommodating the filter holding frame are provided on a downstream side, an air inlet is provided on a bottom surface of the recess, and a periphery of the air inlet is provided. A filter housing provided on an outer edge of the concave portion of the filter housing, and a fastener for pressing the filter retaining frame against the edge of the bottom surface of the concave portion. The concave portion of the filter housing has an area that slidably accommodates the plurality of filter holding frames, and the air inlet and the fastening member are provided for each of the filter holding frames housed in the concave portion. ing.

According to the present invention, since the filter holding frame is accommodated in the concave portion provided on the downstream side of the filter housing, the filter holding frame can be replaced from the downstream side, and there is no need to provide a maintenance space on the upstream side, and the downstream side has a cleanliness. Maintenance work such as filter replacement can be performed in a simple environment.
Further, since there is no need to provide a maintenance space on the upstream side, an area where rust or the like is generated due to the inflowing dirty outside air is also reduced.
The filter holding frame is housed in the concave portion of the filter housing, and is simply pressed against the air inlet peripheral edge on the bottom surface of the concave portion with the fastener, so that the filter housing can be made thinner and the space for the air filter device can be reduced. It is possible.
Since the concave portion of the filter housing has an area for slidably accommodating a plurality of filter holding frames, even if there is an obstacle on the downstream side, these filter holding frames can be moved from any position on the downstream side. It can be housed in a filter housing and slid into place. Further, since a plurality of filters can be easily accommodated in the filter housing, workability such as maintenance is excellent.

1 is a schematic sectional view of an air filter device according to one embodiment of the present invention. It is a schematic perspective view which shows the pre-filter holding frame and this filter holding frame in this invention. It is the front view which looked at the air filter apparatus shown in FIG. 1 from the upstream (air inflow side). FIG. 2 is a rear view of the air filter device shown in FIG. 1 as viewed from a downstream side (air outflow side).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
An air filter device 100 according to an embodiment of the present invention shown in FIG. 1 has pre-filter holding frames 11 and 11 ′ having built-in pre-filters 1 and 1 ′ and main filter holding having medium-performance filters 2 and 2 ′. The frames 21 and 21 ′ are accommodated in recesses 4 and 4 ′ provided in two stages in the filter housing 3. Note that a high-performance filter can be used instead of the medium-performance filter.
The pre-filters 1 and 1 ′ mainly collect dust in the air, and the medium-performance filters 2 and 2 ′ and the high-performance filters are located downstream of the pre-filters 1 and 1 ′ and are finer. It collects dust.

  As shown in FIG. 2, the pre-filter holding frames 11 and 11 'and the main filter holding frames 21 and 21' are formed of a frame, and edges 111, 111 'and 211 are formed around the front surface located on the upstream side. , 211 ′ are formed integrally with the frame, and a similar edge is formed around the rear surface located on the downstream side. A gasket 8 for sealing is attached to the front surfaces of the edges 111, 111 ', 211, 211'. The gasket 8 may be attached to the other surface where the front surfaces of the edges 111, 111 ', 211, 211' face each other.

The filter housing 3 is formed of a frame. The frame body is open on the upstream side (indicated by an arrow A in FIG. 1) and on the downstream side (indicated by an arrow B in FIG. 1) of the air. Is fixed in a substantially vertical posture. The fixing is performed, for example, by welding or screwing the outer peripheral portion of the plate member 6 to the inner surface of the frame 3.
A mounting hole 10 for mounting the filter housing 3 to another member (not shown) is provided on the front surface of the frame 3.

  The recesses 4, 4 ′ are provided downstream of the air passing through the filter housing 3, and the air inlets 5, 5 ′ are provided on the bottom surfaces of the recesses 4, 4 ′. The pre-filter holding frames 11, 11 'and the main filter holding frames 21, 21' are accommodated in the concave portions 4, 4 'in this order. The front faces of the pre-filter holding frames 11, 11 'are in contact with the peripheral edges 51, 51' of the air inlets 5, 5 'via the gasket 8.

  Fasteners 7 are attached to the outer edges (upper and lower outer edges in the present embodiment) of the recesses 4 and 4 ′ of the filter housing 3. The fastening tool 7 includes a long bolt 71 inserted through a through hole (not shown) formed in the outer edge of the recess 4, 4 ′, and a fixed nut 72 screwed to one end of the long bolt 71 upstream of the outer edge. And a contact plate 73 inserted into the long bolt 71 on the downstream side, and a fastening nut 74 screwed to the other end of the long bolt 71 via a washer. The fixing nut 72 may be fixed to the outer edge by welding or the like, or may not be fixed.

  One end of the contact plate 73 extending in the vertical direction from the long bolt 71 contacts the downstream surface of the filter holding frames 21 and 21 ′. Then, by screwing the tightening nut 74, the filter holding frames 21, 21 'are provided on the back surfaces of the pre-filter holding frames 11, 11', and the pre-filter holding frames 11, 11 'are provided on the bottom surfaces of the concave portions 4, 4'. Each of the formed air inlets 5, 5 ′ can be pressed and fixed to the peripheral edges 51, 51 ′ via the gasket 8. This prevents air from flowing out downstream from the air inlets 5, 5 'without passing through the filter. In the present embodiment, fasteners 7 are attached above and below the recesses 4 and 4 '.

  As shown in FIG. 3, on the front side of the filter housing 3 facing the upstream side, air inlets 5, 5 'are formed in two vertical stages and three horizontal lines. That is, when the combination of one pre-filter holding frame 11, 11 ′ and one main filter holding frame 21, 21 ′ is one unit 9, 9 ′, the air inlet 5, 5, 'Is provided.

As shown in FIG. 4, recesses 4 and 4 ′ provided on the back surface of the filter housing 3 facing the downstream side can slide three units 9 and 9 ′ in a transverse direction across the air inflow direction. It has the size to accommodate.
Therefore, even if the holding frames 11 and 11 'and the main filter holding frames 21 and 21' cannot be accommodated in the recesses 4 and 4 'because there is an obstacle in a part of the downstream side of the filter housing 3, there is no obstacle. The pre-filter holding frames 11 and 11 'and the main filter holding frames 21 and 21' are placed in the recesses 4 and 4 'from the parts and are slid laterally and accommodated in the recesses 4 and 4' at predetermined positions. Can be.
The fastening tool 7 is provided for each of the units 9 and 9 'housed side by side in the recesses 4 and 4'.

  Next, a method of mounting the pre-filter holding frames 11, 11 'and the main filter holding frames 21, 21' to the filter housing 3 will be described. In the following description, a method of mounting the pre-filter holding frame 11 and the main filter holding frame 21 will be described. However, the pre-filter holding frame 11 ′ and the main filter holding frame 21 ′ can be mounted in the same manner.

The filter housing 3 is mounted, for example, in an intake duct (not shown) with the concave portion 4 on the downstream side. First, the pre-filter holding frame 11 is inserted and placed in the recess 4 from the downstream side, and then the present filter holding frame 21 is inserted and placed.
At this time, when there is an obstacle on the downstream side of the filter housing 3, as described above, the holding frames 11, 21 are inserted into the recess 4 from the position where they can be accommodated, and then slid to the predetermined position. .

After the pre-filter holding frame 11 and the main filter holding frame 21 are accommodated in the predetermined positions in the concave portion 4 in this manner, one end of the contact plate 73 of the fastening tool 7 is brought into contact with the back surface of the main filter holding frame 21. Then, it is fixed by tightening with a tightening nut 74.
To remove the pre-filter holding frame 11 and the main filter holding frame 21 from the filter housing 3 for maintenance or the like, the above operation may be performed in reverse.

According to the present embodiment, the pre-filter holding frame 11 and the main filter holding frame 21 can be accommodated and removed from the recess 4 of the filter housing 3 from the downstream side, and maintenance such as filter replacement can be performed on the upstream side. Since there is no need, maintenance work can be performed in a clean space on the downstream side where dust is removed through the filters 1 and 2.
Further, since the pre-filter holding frame 11 and the main filter holding frame 21 housed in the concave portion 4 are pressed and fixed by the fastening tool 7, a special fixing tool such as a cam crank or the like is not required, and the filter can be easily replaced. In addition, the thickness of the filter housing 3 can be reduced, and the space of the air filter device can be reduced.

  In the present invention, the pre-filter holding frame 11 and the main filter holding frame 21 are separately housed in the recess 4 of the filter housing 3, but the two holding frames 11 and 21 previously integrated are housed in the recess 4. You may make it tighten with the fastener 7. Further, a filter in which the pre-filters 1 and 1 'and the medium-performance filters 2 and 2' are mounted in one holding frame may be used.

  Further, the fastening tool is not limited to the one in the above embodiment, and various tools other than the above can be adopted.

  Further, in the present embodiment, the air inlets 5, 5 'are formed in the filter housing 3 in two vertical rows and three horizontal rows. However, the present invention is not limited to this, and two or more rows of plural rows are provided. The number of stages may be one or two or more.

1, 1 'pre-filter 2, 2' medium-performance filter 3 filter housing 4, 4 'recess 5, 5' air inlet 6 plate 7 fastening tool 8 gasket 9, 9 'unit 10 mounting hole 11, 11' pre-filter holding Frame 21, 21 ′ Main filter holding frame 51, 51 ′ Peripheral edge 71 Long bolt 72 Fixed nut 73 Contact plate 74 Tightening nut

Claims (3)

A plurality of filter holding frames with built-in filters,
A recess for accommodating the plurality of filter holding frames is provided on the downstream side, an air inlet is provided on the bottom surface of the recess, and a filter housing in which the front surface of the filter holding frame abuts on the periphery of the air inlet,
A fastening tool provided at an outer edge of the concave portion of the filter housing and pressing a plurality of the filter holding frames against an edge of a bottom surface of the concave portion,
The concave portion of the filter housing has an area for accommodating the plurality of filter holding frames so as to be slidable in a lateral direction across the air inflow direction ,
An air filter device, wherein the air inlet and the fastener are provided for each of the filter holding frames housed in the recess.   The filter holding frame includes: a pre-filter holding frame having a built-in pre-filter; and a main filter holding frame having a medium-performance filter or a high-performance filter built therein. 2. The air filter device according to claim 1, wherein the air filters are accommodated in this order. A gasket is interposed between the periphery of the air inlet and the front surface of the pre-filter holding frame abutting on the periphery, and between the back surface of the pre-filter holding frame and the main filter holding frame. Item 3. The air filter device according to item 2 .

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