JPS61187913A - Filter device for air purification - Google Patents

Abstract

PURPOSE:To obtain a device permitting reduction of maintenance cost maintaining high filtration performance by arranging filter units provided with air purifying filter to a frame multistagewise. CONSTITUTION:A first-third filter units are constituted of filter 11-13 and a separator 2 respectively to a frame 14-16, and each unit is attached to an external frame 3 with epoxy adhesive agent 4 so as to stick the outside periphery of each frame 14-16 tightly to the inside wall of the external frame 3. Accordingly, if the air purifying capacity of the filter 11 drops to some extent by collecting dust, the first filter unit is removed, and the second and the third filter unit are slid to the inlet side of air stream simultaneously, and a fresh filter unit can be fitted to behind the third filter unit. Thus, the maintenance cost of the filtration device can be held at a low level.

Description

DETAILED DESCRIPTION OF THE INVENTION C. INDUSTRIAL APPLICATION FIELD The present invention relates to an air cleaning filter device used to filter environmental air and remove floating dust.

[Conventional technology]

FIG. 2 is a partial perspective view showing a conventional air cleaning filter device.

The air cleaning filter 1 is made of glass fiber or the like,
A coating resin is applied to the surface to strengthen water-breaking properties. Such an air cleaning filter 1 is bent into a bellows shape and attached to an outer frame 3 made of plywood or metal plate with adhesives 4 and 5 to prevent air leakage.

Separators 2 are inserted into each bent portion of the air purifying filter 1 from both sides so that air passes through the entire surface of the filter 1 evenly. Note that the separator 2 is fixed to the outer frame 3 and also has the role of fixing the air purifying filter 1.

When the air containing dust passes through the air purifying filter 1, the dust is collected by the filter 1 and the air is purified. Filter 1 has a certain thickness, and most of the relatively large dust is absorbed by the air cleaning filter.
The dust is collected on the surface of the filter l, and relatively small dust is collected inside.

Once the filter 1 collects a certain amount of dust, its air purifying ability decreases, so it is replaced with a new filter at an appropriate time in order to maintain predetermined filtration characteristics.

[Problem that the invention seeks to solve]

By the way, the amount of dust collected on the surface of the filter 1 is much larger than the amount of dust collected inside the filter 1. Therefore, the dust collection ability of the surface of the filter 1 is greater than that of the filter 1. The dust collection capacity decreases faster than the internal dust collection capacity. Therefore, in order to maintain predetermined filtration characteristics, the filter must be replaced even though the filter 1 still has sufficient dust collection ability. In a sense, this can be said to be a waste of filter replacement.

The present invention has been made in view of the above problems, and its purpose is to provide an air purifying filter device that can reduce maintenance costs while maintaining stable and high filtration performance. It is about providing.

[Means for solving problems]

In order to achieve the above object, the present invention has a filter unit in which an air purifying filter is attached to a frame and arranged in multiple stages.

[Effect]

Most of the dust is collected by the filter of the filter unit disposed on the air intake side, and the relatively small dust that has passed through this filter is collected by the rear filter unit.

〔Example〕

Hereinafter, the present invention will be described in detail along with examples.

FIG. 1 is a partial perspective view showing one embodiment of the present invention,
The same or corresponding parts as in FIG. 2 are given the same reference numerals.

The air cleaning filters 11 to 13 are bent into bellows shapes and are attached to the frames 14 to 16, respectively, with a rubber adhesive 17 so that no air leakage occurs at the bonded portions.

Separators 2 are inserted into each bent portion of the air purifying filters 11 to 13 from both sides so that air passes through the entire surface of the filter 11 evenly. Note that the separator 2 is fixed to the frames 14 to 16, and also has the role of fixing the air cleaning filters 11 to 13.

In this way, filter 1 is applied to frames 14 to 16 respectively.
By attaching filters 1 to 13 and separator 2, first to third filter units are constructed.

The first to third filter units each have a frame 14.
It is attached to the outer frame 3 with an epoxy adhesive 4 so that the outer periphery of 16 and the inner wall of the outer frame 3 are in close contact with each other.

In this embodiment, the first filter unit side is the air inlet side.

The filters 11 to 13 all have substantially the same thickness, and are sufficiently thinner than conventional single-layer air purifying multilayer filters. Therefore, even when these are used in a stacked manner, there is no pressure loss compared to a conventional single-layer air purifying filter having the same filtration area. Note that the filtration area can be adjusted by the number of folds of the filter, and as the number of folds is increased, the filtration area increases.

Furthermore, it can be said that the cost per filter is lower due to its thinner thickness.

The air containing dust passes through filter units arranged in multiple stages in order, so that the dust is removed from the filters 11 to 13.
is collected and purifies the air.

Most of the dust contained in the air passing through the filters 11 to 13 is collected by the filter 11 of the first filter unit, and the dust that has passed through the filter 11 is collected by the filter 12 of the second filter unit, and then further passed through the filter 12. The collected dust is collected by the filter 13 of the third filter unit.

When the filter 11 collects a certain amount of dust, its air purifying ability decreases, so it is necessary to replace the filter with a new one at an appropriate time in order to maintain predetermined filtration characteristics as an air purifying filter device.

In this case, the first filter unit is removed, the second filter cap unit and the third filter unit are slid toward the air inlet, and a new filter unit is placed further behind the third filter unit. That is,
The second filter unit and the third filter unit are respectively made into a new first filter unit and a new second filter unit, and the new filter unit is made into a new third filter unit.

Note that although the filter unit of this embodiment has a three-stage structure, it goes without saying that two or more stages may be used.

〔Effect of the invention〕

As explained above, according to the air purifying filter device of the present invention, the filter unit is arranged in multiple stages, so that when the filtration characteristics deteriorate, the air intake side, which has the largest amount of collected dust and is most fatigued, If you remove the filter unit and place the new filter unit at the rearmost position, each filter will be slid in sequence each time you replace the filter unit, and the filters installed in each filter unit will be maximally effective. It is used for Furthermore, when a multistage filter is used, each filter can be made thinner, and the cost per filter can be reduced, so maintenance costs can be kept low.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view showing an embodiment of the present invention, and FIG. 2 is a partial perspective view showing a conventional air cleaning filter unit. 3...Outer frame, 11-13...Air cleaning filter,
14-16...Frame.

Claims (1)

[Claims] An air purifying filter device characterized in that filter units each having an air purifying filter attached to a frame are arranged in multiple stages.