JPH038408A - Unit filter - Google Patents

Abstract

PURPOSE:To reduce the area on the negative pressure side as the secondary side and to simplify the sealing structure by opposing the angular protrusion of a filter to the inlet for the air to be filtered and opposing the opening on the valley side and frame to the outlet for the filtered air. CONSTITUTION:A filter 20 lined with a reinforcement and with the filter medium exposed toward the inlet for the air to be filtered is puckered into a continuous angular shape, the spaces on its upper and lower ends are closed with an angular blocking plate 21, and the periphery of the valley-side opening 20b is fixed to the rectangular frame 23. The angular protrusion 20a of the filter 20 is opposed to the inlet for the air to be filtered, and the valley-side opening 20b and frame 23 are opposed to the outlet for the filtered air. As a result, the area on the negative pressure side as the secondary side is reduced, the sealing structure is simplified, the area of the inlet-side opening is increased to decrease the structural pressure drop, and the precision in filtration is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a unit filter housed in, for example, an air conditioner, and particularly relates to an improvement in the arrangement structure for use thereof.

(Conventional technology) For example, in an air conditioner equipped with a refrigeration cycle.

A unit filter is provided to filter the air in the conditioned room and guide it to the heat exchange section. Conventionally, the structure of the above-mentioned unit filter is as shown in FIGS. 4 and 5. That is, 1 is a filter, which is bent into a continuous mountain shape. The upper and lower end spaces of the filter 1 are closed by mountain-shaped closing plates 2 . Further, the chevron-shaped protrusions 1a of the filter 1 are lined and reinforced by vertical bars 3 that connect the ends of the upper and lower blocking plates 2.2. Further, the periphery of the valley side opening 1b is attached to the rectangular frame 4, and the valley side bottom IC
... are attached to the frame body 4 along the vertical beams 5, which are constructed at predetermined intervals, and are backed and reinforced. The closing plates 2, vertical bars 3, 5, and frame 4 are generally all made of nonwoven fabric.

As only shown in FIG. 5, on the protruding side of the closing plate 2 of the frame 4,
A cushioning material 6 is attached to obtain a cushioning effect which will be described later.

As shown by the arrow in FIG. 1, the unit filter Fa configured in this way introduces filtered air from the valley side opening 1b on the side of the frame body 4, filters it, and then filters it through the chevron-shaped protrusion 1a.
...It is arranged so that it is derived from the side. As shown in FIG. 6, the filter 1 is in the form of a sheet made by lining and reinforcing a filter medium 7 with a porous reinforcing material 8. It is designed to generate dust and other particles when it is introduced and passed through.

When actually used by placing it in, for example, an air conditioner, it becomes as shown in FIG. Namely.

Open the door body 11 which is pivoted to be openable and closable on the side of the filter box 10 that constitutes the air conditioner.

The unit filter Fa is removably inserted.

To explain, a rail 12 bent in a substantially U-shape is provided on the upper and lower surfaces (only the upper part is shown) along the width direction of the filter box 10, and is designed to guide the frame 4 of the unit filter Fa. It has become. The cushion material 6 is located on the back side of the frame body 4, and both are guided by the rail 12. Then, with the unit filter Fa placed in the filter box 10, the chevron-shaped protrusions 1a of the filter 1 are set to substantially abut against the back side of the box 10. In the figure, 13 is a prefilter.

Similar to the above-mentioned unit filter Fa, it is detachable from the box 10 in order to remove the adsorbed and filtered dust.

In FIG. 1 of such a filter box 10, a blower (not shown) is disposed on the back side.

It is designed to suck in air from the air-conditioned room and guide it to a heat exchange section (not shown). That is, the air to be conditioned, which is filtered air, is introduced into the filter box 10 via the pre-filter 13 as shown by the arrow in the figure, and is further introduced into the filter box 10 through the valley-side opening 1b of the unit filter Fa through the chevron-shaped protrusion 1a.
... side, and is filtered when it passes through filter 1.

(Problem to be Solved by the Invention) The arrangement of the unit filter Fa is set in this way because the unit filter Fa is
bulges out as a whole, but it must be able to withstand relatively large static pressure.

However, on the other hand, the chevron-shaped protrusion 1a of the unit filter Fa becomes the secondary side (negative pressure side) and comes into contact with the back side of the filter box 10, so the secondary side area is very Become big. Therefore, these)
It takes time and effort to reliably seal each other and maintain airtightness. If the seal is inadequate, air will be sucked in from the surrounding area.

Air that does not pass through the unit filter Fa is directly led to the heat exchange section, resulting in a decrease in filtration accuracy.

Moreover, such a unit filter Fa has a valley side bottom part I.
Since the C side faces the filtered air suction side, the opening area is small, the strength is weak, and it is easily deformed, and the so-called structural pressure loss becomes large.

The present invention has been made in view of these circumstances, and its purpose is to simplify the seal structure by reducing the area on the negative pressure side, which is the secondary side, and to simplify the sealing structure on the inlet side. The object of the present invention is to provide a unit filter that has a large opening area, reduces structural pressure loss, and improves filtration accuracy.

[Structure of the invention]

(Means for Solving the Problems) That is, the present invention bends a filter made of a filter material lined with a reinforcing material and exposed on the filtered air introduction side into a continuous mountain shape, and the upper and lower end spaces are formed into a mountain shape. Closed with a closing plate,
In a filter in which the trough-to-bottom portions are attached to a rectangular frame, the chevron-shaped protruding portion of the filter faces the filtered air introduction side, and the trough-side opening and the crushed body are connected to the filtered air. This unit filter is characterized in that it is disposed facing the output side.

(Function) Since filtered air is introduced from the side of the chevron-shaped protrusion of the filter and filtered, the opening area on the inlet side becomes large. Since the valley side opening and the crushed body face the filtered air outlet side,
The secondary area is small.

The necessary seal structure is simple.

(Example) Hereinafter, two embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the unit filter F
is configured. That is, 20 is a filter, which is made of a filter medium 7 lined with a reinforcing material 8, similar to that previously explained with reference to FIG.

This filter 20 is bent into a continuous substantially mountain shape, and one upper and lower end space is closed by mountain-shaped closing plates 21 . Each of the chevron-shaped protrusions 20a...

It is lined and reinforced by vertical bars 22 . . . that connect the ends of the upper and lower closing plates 21 and 21. Furthermore, the periphery of the valley-side opening 20b is attached to a rectangular crushed body 23, and the valley-side bottom portion 20c...・It is attached along the line and reinforced with lining. In addition, the above-mentioned closing plate 21... and the vertical bars 22..., 24...
... and the frame 23 are all made of epoxy material, which is a synthetic resin material.

As only shown in FIG. 2, a cushioning material 25 is attached to the side surface of the crushed body 23 opposite to the protruding side surface of the blocking plate 22. As shown in FIG.

The new unit filter F constructed in this manner has its chevron-shaped protrusions 20a...
It is arranged so that filtered air is introduced from the side, filtered, and then led out from the valley side opening 20b side. Since the filtered air is introduced from the chevron-shaped projections 20a of the filter and filtered, the opening area on the inlet side becomes large. the result,
Less structural pressure loss. Further, since the valley side opening 20b and the crushed body 23 are on the outlet side of the filtered air, the secondary side area can be small, and the seal structure when disposed in an actual device can be simple.

Like the conventional one, it can be placed and used in, for example, an air conditioner, as shown in FIG.

The door body 11 is pivotally attached to the side of the filter box 10 constituting the air conditioner so as to be freely openable and closable, and the pre-filter 13
Similarly, it is provided in a detachable manner. In such a filter box 10, the position of the rail 26 that freely guides the unit filter F as described above is provided along the secondary side, which is the rear side in the diagram of the filter box 10. The cushion material 25 is interposed between the frame 23 and the back side of the filter box 10.

In this diagram of the filter box 10, a blower (not shown) is disposed on the back side.

It is designed to suck in air from the air-conditioned room and guide it to a heat exchange section (not shown). That is, the air in the conditioned room, which is filtered air, is guided into the filter box 10 via the pre-filter 13, as shown by the arrow in FIG. It is passed through a and is led out from the valley side opening 20b side. Therefore, as described above, the opening area on the inlet side of the unit filter F is increased, and the structural pressure loss is reduced.

In the filter box 10 of an actual air conditioner, the following data results were obtained. That is, in the case of a filter medium area of 5.2 r& and a processing air volume of 13.3 c/2, the conventional unit filter Fa had an amount of 4 Aq, but when the unit filter F of the present invention was used, the amount was 2.
71 Aq, which was reduced to about 2/3 or less.

Furthermore, since the secondary side area of the unit filter F is increased, the sealing structure for the filter box 10 is simplified and requires less effort.

Since the frame body 23 is interposed between the rail 26 and the filter box 10, it will not bulge and deform even if it is affected by the static pressure of the blower, and the cushion material 25 will absorb the deformation. It does not impair sealing performance.

In this way, in the above embodiment, the closing plate 21...
Since the vertical bars 22, 24, and the frame 23 are all made of epoxy material, the overall strength is increased compared to the conventional unit filter F using a nonwoven fabric material.

〔Effect of the invention〕

As explained above, according to the present invention, the area on the negative pressure side, which is the secondary side, can be reduced by reversing the conduction direction of the filter air and the front and back sides of the filter without changing the basic configuration of the unit filter. This simplifies the seal structure, increases the opening area on the inlet side, reduces structural pressure loss, and improves filtration accuracy.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention; Figure 1 is a perspective view of a unit filter, Figure 2 is a schematic vertical side view thereof, and Figure 3 is a unit filter assembled into an air conditioner. FIG. 4 to 7 show conventional examples of the present invention, FIG. 4 is a perspective view of a unit filter, FIG. 5 is a schematic vertical side view thereof, and FIG. 6 is an enlarged longitudinal sectional view of a part of the filter. , 7th
The figure is a perspective view illustrating a state in which the unit filter is assembled into an air conditioner. 8... Reinforcing material, 7... Filtering material, 20... Filter. 20a... chevron-shaped protrusion, 21... blocking plate, 20b...
... Valley side opening, 23... Frame.

Claims (1)

[Claims] A filter lined with a reinforcing material and with the filter medium exposed on the filtered air introduction side is bent into a continuous mountain shape, and the upper and lower end spaces are closed with mountain-shaped closing plates, and the periphery of the valley side opening is closed. is attached to a rectangular frame, with the chevron-shaped protrusion of the filter facing the filtered air introduction side, and the valley side opening and the frame facing the filtered air outlet side. A unit filter characterized by: