JPH10277334A - Gas filter and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas filter which, for example, is used on an air conditioning device or an air cleaner and besides, is capable of capturing even an extremely tiny dust and of a low fluid resistance value. SOLUTION: This gas filter is a laminate formed of an electrostatically changed fluffy and corrugated sheet 2 and a plain sheet 1 laminated alternately in plural tiers. In addition, the axial direction of tiny through holes 4 formed in the laminate is formed obliquely with a face in which the tiny through holes 4 are open, and the tiny through holes 4 allow the passage of gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas filter used for, for example, an air conditioner or an air purifier, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, various filters for removing dust in a gas have been proposed and put into practical use. The characteristics required of these gas filters include how to remove even small dust, how to extend the life, how to reduce the fluid resistance, and the like.

[0003] For this reason, a filter made of paper, metal or the like, or a material obtained by dyeing both of them with oil or the like has long been used as a filter material. In recent years, a material using a charging sheet in which a material obtained by charging a static electricity on a synthetic resin fiber such as polypropylene into a nonwoven fabric has been put into practical use.

[0004] Further, Patent Application Publication No. 1991 No. 1968
No. 13, using the above-mentioned charged sheet,
A honeycomb-shaped gas filter in which a corrugated sheet and a flat sheet are alternately overlapped has been proposed and put to practical use by the present applicant.

[0005] The honeycomb-shaped gas filter disclosed in the above-mentioned publication has extremely low fluid resistance as compared with a gas flow in a direction perpendicular to the surface of a sheet-like filter medium, and particularly after a large amount of dust is captured. However, there is an advantage that the fluid resistance does not increase rapidly.

[0006]

As described above, the one disclosed in the above-mentioned publication discloses a gas filter which satisfies the characteristics required for a gas filter at a high level, but is required to capture even smaller dust. Is out.

[0007] The present invention provides a method for satisfying the above-mentioned requirements.
That is, an object is to provide a gas filter capable of capturing even very small dust.

[0008]

SUMMARY OF THE INVENTION The present invention is a laminate formed by alternately laminating a plurality of corrugated sheets and flat sheets which are charged with static electricity and fluff, and formed in a laminate. The direction of many small through-holes was formed so that it may incline with respect to the small through-hole opening surface, and the gas was made to pass through these many small through-holes.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is formed as an alternating laminate of a corrugated sheet and a flat sheet which are charged with static electricity, that is, a honeycomb laminate having a plurality of small through holes. The direction of the plurality of small through-holes formed in the laminate is formed to be inclined with respect to the small through-hole opening surface, and configured to allow gas to pass through the plurality of small through-holes. The effect is that the air flowing perpendicularly to the small hole opening surface collides with the inclined small hole wall, so that small dust floating in the air also collides with the small hole wall and is adsorbed on the wall surface. Having.

[0010]

FIG. 1 is a perspective view of a gas filter according to a first embodiment. In FIG. 1, 1 is a flat sheet, and 2 is a corrugated sheet.

As the flat sheet 1 and the corrugated sheet 2, for example, a sheet material made of a nonwoven fabric by entangled with charged polypropylene fibers is used. The sheet material thus formed is in a charged state, and has a state in which fluff 3 is densely formed on the surface.

Further, a honeycomb shape having a plurality of small through holes 4 is formed by alternately laminating the flat sheet 1 and the corrugated sheet 2. The flat sheet 1 and the corrugated sheet 2 are fluff 3
As shown in FIG. 2, the fluff 3 is densely formed on the inner surface of the plurality of small through holes 4.

As shown in FIG. 3, the axes of the plurality of small through holes 4 are inclined with respect to the opening forming surface 5 of the small through hole 4. This inclination has an angle at which the projected image of the entrance opening 6 of the small through hole 4 does not overlap with the exit opening 7.

When the object is charged, the static electricity tends to concentrate on the tip, and the flat sheet 1 and the corrugated sheet 2 are charged and fluffy. Static electricity is concentrated on That is, static electricity is concentrated on the inner surface of the small through hole 4.

The first embodiment has the above-described configuration, and this gas filter is used, for example, as an air filter.
Filter dust in the air.

In use, the opening forming surface 5 of the small through hole 4 is used.
, Air is allowed to flow in the vertical direction, and air is allowed to pass through the small through holes 4. Then, since the inner wall of the small through hole 4 is inclined,
The air hits the inner wall of the small through hole 4 near the entrance opening 6 of the small through hole 4.

The air generates a turbulent flow and generates small turbulent holes 4.
And exits through the outlet opening 7 of the small through hole 4.
Then, when the dust in the air hits the wall, it is trapped on the wall by static electricity. In addition, since air generates a turbulent flow in the small through-hole 4, dust in the air hits the wall with a high probability, and the probability of being caught by the wall increases.

Further, the axis of the small through-hole 4 is inclined with respect to the opening forming surface 5 of the small through-hole 4, so that the projected image of the entrance opening 6 of the small through-hole 4 does not overlap with the exit opening 7. The air that has entered through the inlet opening 6 of the small through-hole 4 does not go straight to the outlet opening 7, and dust hits the inner wall of the small through-hole 4 with a higher probability.

[0019]

Embodiment 2 In this embodiment, as shown in FIG. 4, fuzzy corrugated sheets 8 and 9 which are charged with static electricity are adhered and laminated so that their tops are in line contact with each other. This embodiment 2 also provides a honeycomb-shaped gas filter in which a plurality of small through holes 10 are formed by the corrugated sheets 8 and 9.

Then, as shown in FIG.
Is inclined with respect to the opening forming surface of the small through hole 10. The inclination angle θ is the same as that in the first embodiment, except that the projected image 6a of the entrance opening 6 of the small through hole 10 is
has a value that does not overlap with a.

At the time of use, as in the first embodiment, air is caused to flow in a direction perpendicular to the opening forming surface of the small through-hole 10 and air is passed through the small through-hole 10. Then, since the inner wall of the small through hole 10 is inclined, the air hits the inner wall of the small through hole 10 near the entrance opening of the small through hole 10.

The air generates a turbulent flow while the small through holes 1
0, and goes out of the exit opening of the small through-hole 10. Then, when the dust in the air hits the wall, it is trapped on the wall by static electricity. In addition, since air generates a turbulent flow in the small through-hole 10, dust in the air hits the wall with a high probability, and the probability of being caught by the wall increases.

As described above, the operation of the second embodiment is the same as that of the first embodiment.
It is the same as that of the gas filter. Therefore, this gas filter also has the same operation and effect as those of the first embodiment.

[0024]

Embodiment 3 Embodiment 3 relates to a method for manufacturing a gas filter of the present invention.

In manufacturing the gas filter of the present invention, first, a non-woven fabric sheet is made by using a fiber made of a material having an extremely high electric resistance such as polypropylene and charged with static electricity.
This step is performed, for example, in Japanese Patent Application Publication No.
The description is omitted because it is publicly known in Japanese Patent Publication No.

Using the sheets produced in this manner, a flat sheet 11 and a corrugated sheet 12 are alternately laminated as shown in FIG. This alternate lamination method is described, for example, in Japanese Patent Application Publication No.
No. 628 is used. The resulting block body 13 is cut along cutting lines 14 and 15 to obtain a gas filter.

The cutting lines 14 and 15 are inclined with respect to the plane 16 of the flat sheet 11. By cutting the block body 13 along the cutting line, the plurality of small through holes 4 are formed to be inclined with respect to the opening forming surface 5 of the small through hole 4 as shown in FIG.

The preparation of the gas filter according to the present invention in this way, first the block body 13 is formed, because you have to slice the block body 13 _{to the} next diagonally, readily produce large quantities of gas filter be able to.

[0029]

Embodiment 4 When a sheet of non-woven fabric charged with static electricity is formed into a block shape by the method described in, for example, Japanese Patent Application Publication No. 58293/1991, the tops of a plurality of corrugated sheets are joined together as shown in FIG. The honeycomb-shaped block body 17 shown in FIG. The block body 17 thus produced is cut along cutting lines 18 and 19 to obtain a gas filter.

In the manufacturing method of this embodiment, the block 1
Since the block 7 is formed and the block 17 is sliced obliquely, a large amount of gas filters can be easily produced.

[0031]

Fifth Embodiment In slicing the block body 13, as shown in FIG.
When the angle θ1 formed by the cutting line 14 and the cutting line 14 is made obtuse, the slicing operation is stabilized. That is, when slicing is performed as shown in FIG. 6, the cutting blade 17 is positioned above the base 18 until the cut of the cutting blade 17 is near the end, and the block body 13 is not shaken and is stable. A cut can be made.

Conversely, as shown in FIG. 7 which is a sectional view, when the angle θ2 between the plane 16 of the block body 13 and the cutting line 14 is made to be an acute angle, the cutting blade 17 Since the block body 13 is separated from the position vertically above the block 18, the block body 13 is deformed along with the slicing work, and the cutting work becomes unstable.

[0033]

Since the gas filter of the present invention is constructed as described above, a large number of small holes are formed over the entire surface, and the gas to be filtered passes through the large number of small holes, so that the fluid resistance is small. Since the dust in the gas to be filtered is adsorbed on the wall of the small through-hole by static electricity while passing through the small through-hole, even if the dust is slightly absorbed, the fluid resistance does not suddenly increase.

Further, since the direction of the small through-hole is formed so as to be inclined with respect to the surface of the small through-hole, the gas flowing perpendicularly to the surface of the small through-hole hits the inner wall of the small through-hole. For this reason, dust in the gas also hits the inner wall of the small through-hole, and the rate at which dust is adsorbed on the inner wall of the small through-hole increases.

If the projected images of the entrance and the exit of the small through-hole do not overlap each other, the air entering from the entrance of the small through-hole does not exit straight out of the exit. It becomes easier to be adsorbed on the wall.

Further, according to the gas filter manufacturing method of the present invention, a corrugated sheet and a flat sheet are alternately laminated to form a block, and the block is cut obliquely, so that the productivity is high. In particular, when the cut is made at an obtuse angle with respect to the upper surface of the block body, the cut can be stably performed.

[0037]

[Brief description of the drawings]

FIG. 1 is a perspective view showing Embodiment 1 of a gas filter of the present invention.

FIG. 2 is a partially enlarged view showing an example of the gas filter of the present invention.

FIG. 3 is a sectional view showing Embodiment 1 of the gas filter of the present invention.

FIG. 4 is a perspective view showing Embodiment 2 of the gas filter of the present invention.

FIG. 5 is a perspective view illustrating a method for manufacturing a gas filter of the present invention.

FIG. 6 is a side view showing the method for manufacturing the gas filter of the present invention.

FIG. 7 is a side view showing a comparative example of the gas filter manufacturing method of the present invention.

[Explanation of symbols]

 Reference Signs List 1 flat sheet 2 corrugated sheet 3 fluff 4 small through hole 5 small through hole opening forming surface 6 small through hole entrance opening 7 small through hole exit opening

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[Procedure amendment]

[Submission date] June 23, 1997

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

As described above, the one disclosed in the above-mentioned publications satisfies the characteristics required of a gas filter at a high level, but demands to capture even smaller dust. Is out.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

Then, as shown in FIG.
Is inclined with respect to the opening forming surface of the small through hole 10. The inclination angle θ is the same as that in the first embodiment, except that the projected image 6a of the entrance opening 6 of the small through hole 10 is
has a value that does not overlap with a.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

The air generates a turbulent flow while the small through holes 1
0, and goes out of the exit opening of the small through-hole 10. Then, the dust in the air is captured by the wall by the static electricity when it hits the wall and the fluff . In addition, since air generates a turbulent flow in the small through-hole 10, dust in the air hits the wall with a high probability, and the probability of being caught by the wall increases.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

As described above, the method of manufacturing the gas filter of the present invention
According to the method , the block 13 is formed first, and then the block 13 is sliced obliquely, so that a large amount of gas filters can be easily produced.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0029

[Correction method] Change

[Correction contents]

[0029]

Embodiment 4 When a sheet of non-woven fabric charged with static electricity is formed in a block shape by the method described in, for example, Japanese Patent Application Publication No. 1983-293293, FIG. it can be obtained honeycomb block body 13 as shown in. The block 13 thus produced is cut along the cutting lines 14 and 15 to obtain a gas filter.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

In the manufacturing method of this embodiment, the block 1
Since the block 3 is formed and then the block body 13 is sliced diagonally, a large amount of gas filters can be easily produced.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

Further, in the method of manufacturing a gas filter according to the present invention, a corrugated sheet and a flat sheet are alternately laminated to form a block, and the block is cut obliquely. In particular, when cutting is performed at an obtuse angle with respect to the upper surface of the block body, cutting can be stably performed.

Claims (5)

[Claims] 1. An alternating laminate of a corrugated sheet and a flat sheet which are charged with static electricity and which are fluffy, wherein the direction of a small through hole formed by the corrugated sheet and the flat sheet is an opening surface of the small through hole. A gas filter configured to be inclined with respect to the gas passage so as to allow gas to pass through the small through-hole. 2. A laminate in which a plurality of corrugated sheets which are charged with static electricity and fluffy are laminated in a state of being in line contact with each other,
A gas filter, wherein a direction of a small through hole formed between the plurality of corrugated sheets is inclined with respect to an opening surface of the small through hole, and a gas passes through the small through hole. 3. A block body is formed by alternately laminating a corrugated sheet and a flat sheet which are charged with static electricity, and the block body is cut obliquely with respect to the plane of the flat sheet. Gas filter manufacturing method. 4. A block body is formed by laminating a plurality of electrostatically fuzzy corrugated sheets in line contact with each other to form a block, and cutting the block obliquely with respect to the surface of the corrugated sheet. A method for manufacturing a gas filter. 5. The method for manufacturing a gas filter according to claim 3, wherein the cutting is performed at an obtuse angle with respect to the upper surface of the block body.