JPH04161213A - Filter unit - Google Patents

Abstract

PURPOSE:To achieve the miniaturization and wt. reduction of the whole of a filter apparatus and to reduce pressure loss by filling V-shape spaces formed by the pleats of a dust removing filter material and a flat antibacterial filter material with a deodorizing material composed of granules having a specific particle diameter. CONSTITUTION:V-shape spaces formed by the pleats of a dust removing filter material 2 subjected to pleating processing and a flat antibacterial filter material 4 are filled with a deodorizing material 3 (e.g. a granular activated carbon) composed of granules having a particle diameter not passing through a screen with a nominal dimension of 1000mum (JIS-Z-8801) but passing through a screen with a nominal dimension of 11.1mm. As a result, since this filter unit can be made compact as compared with conventional filter unit forming technique, the miniaturization and wt. reduction of the whole of a filter apparatus can be achieved and pressure loss can be reduced from the aspect of capacity without exerting effect on dust collecting efficiency at all.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an air filter unit, and particularly to a filter for an air cleaner, a filter for an air conditioner, an exhaust filter for a vacuum cleaner, and the like.

(Prior Art) Today, when considering air filters for air purifiers, air conditioners, vacuum cleaners, etc., the deodorizing function is an indispensable function in addition to the dust removal function. Therefore, the above-mentioned air filters are generally a combination of a dust removal filter material and a deodorizing material, but in this case, the dust removal filter material is often a pleated filter material to increase the filter area. Also, as deodorizing materials, foamed molded products impregnated with chemical substances having a deodorizing function and granular activated carbon molded into plate shapes have often been used.

When these dust removal filter materials and deodorizing materials are combined into one filter unit, the dust removal filter materials and deodorization materials must be arranged in series.

(Problem to be solved by the invention) When a filter unit is produced using the above technology,
Since the dust removal filter medium and the deodorizing medium must be arranged in series, the filter unit becomes correspondingly large, and accordingly, the filtration device to which the filter unit is mounted also needs to be enlarged.

If the filtration device is required to be compact, such as for home use or in-car use, the filter unit will also need to be made smaller accordingly, resulting in a drop in the performance of the filtration device. It was supposed to happen.

In addition, it is necessary to form a unit using only a deodorizing material in addition to a filter medium for dust removal, and this unitization poses a problem in that the pressure loss of the entire filter unit increases.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a filter unit using a pleated dust removal filter material, in which the dust removal filter material and the planar antibacterial filter material are separated from each other. The Japanese Industrial Standards standard sieve JIS-Z is placed in the 7-shaped space formed.
-8801 does not pass through a sieve with a nominal size of 1000μ,
A filter m having dust removal, deodorization, and antibacterial functions, characterized in that it is filled with a deodorizing material made of pellet-like granules having a particle size that passes through a sieve with a nominal size of 11°1 am;
It's about knitting.

In the present invention, the folded dust removal filter medium includes glass fiber filter media, synthetic fiber filter media, electret fiber filter media, etc., and preferably electret fiber filter media. Further, the folding width of the filter medium is 3 to 200 mm, and the shape thereof is V-shaped, U-shaped, etc. Furthermore, in order to make the pitch of the folds of the filter medium uniform, a so-called beading process may be performed in which hot melt resin or the like is adhered to the surface of the filter medium.

Further, the deodorizing material in the present invention includes granules obtained by granulating inorganic adsorbents such as zeolite, silica gel, alumina, and activated carbon into so-called pellet shapes such as spherical, cylindrical, and crushed shapes. The particle size of the granular material is determined based on the increase in pressure loss caused by filling the V-shaped space formed by the dust removal filter medium and the planar antibacterial filter material, and the ease with which the granular material can be filled. Expressed in concrete numerical values, it is the particle size that passes through a sieve with a nominal size of 1000 μm according to the Japanese Industrial Standards Standard Sieve JIS-Z-8801, and a sieve with a nominal size of 11.1+=m. A more preferable particle size is one that does not pass through a sieve with a nominal size of 3360μ but passes through a sieve with a nominal size of 5660μ. If the particle size is smaller than these ranges, the pressure loss will be too high, and if the particle size is larger than these ranges, the filling amount will be too small and the service life of the deodorizing material in the filter unit will be shortened.

Furthermore, these deodorizing materials may be impregnated with chemicals or the like in order to increase their deodorizing ability, or some of these deodorizing materials may be used in combination.

These deodorizing materials may be filled by mixing two or more types of deodorizing materials with different particle sizes, and the deodorizing material with a fine particle size is used in the narrow part of the pleat tip of the dust removal filter medium, and the deodorizing material with a fine particle size is used in the wide part. There is no problem in using a mixture of two or more types of deodorizing materials with different particle sizes, such as using a deodorizing material with a large particle size.

The antibacterial filter medium in the present invention is a woven fabric made of synthetic or natural fibers, a woven fabric, pulp paper, synthetic paper, or a composite paper thereof, which has been subjected to antibacterial treatment. Antibacterial treatment methods include applying antibacterial agents using rollers or guides in the same manner as oiling during the manufacturing stage of woven fabrics, nonwoven fabrics, pulp paper, synthetic paper, or composite papers made of synthetic or natural fibers, or composite papers thereof. , by spraying, or by dipping, and then producing an antibacterial filter medium by a conventional method. Or, an antibacterial agent is applied to woven fabric, non-woven fabric, pulp paper, synthetic paper, or a composite paper made of synthetic or natural fibers manufactured by conventional methods using an appropriate method such as padding (mangle squeezing), spraying, or gravure coating. Just do it. Known antibacterial agents can be used. Examples include organic silicone quaternary ammonium salts, halogenated aromatic compounds, and the like.

In the present invention, both ends of the space, such as a 7-shaped space formed by the pleated dust removal filter media and the planar antibacterial filter media, are made of sheet-like materials such as fiber sheets, cardboard, films, etc., or metal , the deodorizing material is sealed by pasting plastic or the like as a frame material with adhesive or the like.

Further, the deodorizing material may be filled into the folds of the dust-removing filter medium on one side or both sides of the dust-removing filter medium.

(Function) In the filter unit manufactured by the above method, the deodorizing material is filled inside the folds of the dust removing filter material, so the size of the entire filter unit is determined by the size of the dust removing filter material, and the deodorizing material is filled with the folds of the dust removing filter material. There is no need to consider the size (it is more compact than before).

In addition, since the deodorizing material is not integrated into a unit by itself, and the deodorizing material is directly filled in the space between the folds of the dust removal filter material and the antibacterial filter material, it is possible to provide a filter unit with lower pressure loss than ever before.

(Example) Example 1 of the filter unit according to the present invention is shown in FIG. 1 below.

Fig. 1 shows a filter unit 1 using a folded dust removal filter medium 2, in which granular deodorizing material 3 that passes through a JI 5-Z-8801: 3360μ sieve is inside the folds of the dust removal filter medium 2. This shows how it is filled. Further, 4 in FIG. 1 represents a filter material that has been subjected to antibacterial treatment and is pasted to fix the deodorizing material 3 filled inside the folds of the dust removal filter material 2.

In addition, FIG. 2 shows a filter unit 5 using a pleated dust removal filter material, which is a conventional technology, as Comparative Example 1.
This figure shows how a deodorizing material unit 6, which is a polyurethane foam that is a foamed molded product and powdered activated carbon is attached to it using a binder, and a folded dust removal filter material 7 are arranged in series.

Next, in order to confirm the performance of the filter unit related to the present invention, the filter unit shown in FIG.
We compared the performance of the filter units shown in the figure.

As a result, the particle size was 0°3 μm at a wind speed of 6.0 cm/s.
The filter unit shown in Fig. 1 had a collection efficiency of 96.7OA for atmospheric dust. On the other hand, the collection efficiency of the filter unit in FIG. 2 was 96.4%, and there was almost no difference between the two. However, in terms of pressure loss, the filter unit shown in Figure 1 had a pressure loss of 7.5+omAq, while the filter unit shown in Figure 2 had a pressure drop of 13
．． 1-=Aq.

Furthermore, when comparing the thickness of the filter unit, the thickness of the filter unit in Fig. 1 is the same as the thickness of the dust removal filter medium, whereas the thickness of the filter unit in Fig. 2 is the same as that of the example of the present invention. It was 1.5 times larger than that of .

Next, the dimensions are 295 fins x 30 m (length x width x
The filter unit has a pitch of 15m1 (thickness).
The V-shaped space formed by the dust-removing filter medium and the antibacterial filter medium, which were folded to a thickness of 11 mm and 28 mm, was filled with granulated carbon having various particle sizes, and the filter characteristics were measured. The results are shown in Table 1.

Table 1: Collection efficiency for atmospheric dust with a particle size of 0.3 μm xX
...Mixing two types of granulated coal at a ratio of 1:1 Example 2~
Although there is no difference in collection efficiency in Comparative Example 1 compared to Comparative Example 4,
The pressure loss is much higher. Furthermore, in Comparative Example 2, it was not possible to fill the container with 100 g, which would guarantee the life of the deodorizing ability.

(Effects of the Invention) The present invention can be made more compact compared to conventional filter unitization techniques, and thus can lead to reductions in size and weight of the entire filtration device. In terms of performance, pressure loss could be reduced without affecting collection efficiency at all.

[Brief explanation of the drawing]

Figure 1 shows Example 1 of the filter unit of the present invention.
It is a partially cutaway perspective view based on. FIG. 2 is a partially cutaway perspective view of a conventional filter unit based on Comparative Example 1. 1... Filter unit 2... Folded dust removal filter material 3... Deodorizing material (granular activated carbon) 4... Antibacterial treated paper 5... Fill 9-! Knit 6...Deodorizing material unit 7...Dust removal filter material

Claims (1)

[Claims] In a filter unit using pleated dust removal filter material, a Japanese Industrial Standards standard sieve JIS-Z-8801 is inserted into the V-shaped space formed by the folds of the dust removal filter material and the planar antibacterial filter material. Dust removal, deodorization, and antibacterial functions characterized by being filled with a deodorizing material made of pellet-like granules with a particle size that does not pass through a sieve with a nominal size of 1000μ but passes through a sieve with a nominal size of 11.1 mm. A filter unit with