JP2010094578A - Air filter apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter apparatus which is capable of preventing occurrence of clogging and has excellent durability. <P>SOLUTION: The first air-permeable core member 1 and the second air-permeable core member 2 arranged, respectively, on the air inflow side and the air outflow side, intermediate core members 3 and 4 arranged each between the first and second core members 1 and 2 so as to separate the space between the first and second core members 1 and 2 into two or more space parts from the air inflow side to the air outflow side and functioning as an air-permeable partition wall and filter members 9a to 9e each contained in the space parts formed by the two or more intermediate core members constitute the air filter apparatus. In the space part formed between the first core member 1 and the intermediate core member 3 adjacent to the first core member 1, a filter member 9a formed by pleating of glass fiber is housed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air filter device having excellent durability capable of efficiently capturing, for example, oil mist or water-soluble mist contained in air.

  For example, in air compressed by an air compressor or the like, oil for lubricating the compressor is often contained in a mist, and this tendency is particularly remarkable in a screw type air compressor. In addition to the air compressed by the air compressor described above, a large amount of oil mist, water-soluble mist, etc. are generated from machine tools, washing tanks, and other various mechanical devices in manufacturing factories, and these are floating in the air. This can lead to environmental degradation in the factory.

  Conventionally, many air filter devices have been proposed to remove the above-described air containing oil or water-soluble mist. As the most typical one, an air filter device having a configuration in which filter members are stacked in a plurality of layers has been proposed, and is disclosed in, for example, Patent Document 1. There has also been proposed an apparatus having a filter compressor that squeezes oil from the filter member when the filter member is superposed on a plurality of layers and, for example, oil mist adheres to the filter member and the filtration efficiency decreases. This is disclosed in Patent Document 2, for example.

JP-A-7-96176 JP 2001-62221 A

  By the way, in the air filter device disclosed in Patent Document 1 described above, as described above, the filter member has a relatively simple configuration in which a plurality of layers are stacked. When the water-soluble mist is adsorbed and reaches a state close to saturation, the filtration efficiency naturally decreases.

  That is, the filter member is immediately clogged and has poor durability. For this reason, it is necessary to frequently replace the unit including the filter member, which has a problem in terms of maintenance and resource saving.

  On the other hand, in the above-described air filter device disclosed in Patent Document 2, when the filter member has adsorbed mist to some extent, oil captured by driving the compressor can be squeezed out from the filter member. Some of the problems disclosed in Patent Document 1 can be improved.

  However, since the filter member is compressed by the compressor, the material such as fibers constituting the filter member remains crushed, which causes a problem that the air permeability decreases. Moreover, since the compressor which compresses a filter member is provided, an incidental installation becomes large and it will be restricted to the adoption to a part of special apparatus with which cost can be disregarded.

  The present invention has been made to solve the problems in the air filter device described above, and by providing a structure in which, for example, the captured oil is dripped positively, the occurrence of clogging is prevented and the cost is reduced. It is an object of the present invention to provide an air filter device that is excellent in durability without causing soaring.

  An air filter device according to the present invention, which has been made to solve the above-described problems, is an air filter device that filters air containing a mist-like substance through a filter member, the air inlet side and the outlet side of the air. An air inflow side between the first and second core members, the first and second air-permeable core members respectively disposed on both surfaces, and the first and second core members. Formed by a plurality of intermediate core members, each of which constitutes a gas-permeable partition wall, the first and second core members, and the plurality of intermediate core members. A filter member housed in each of the space portions, and a filter portion formed by pleating in the space portion formed by the first core member and the intermediate core member adjacent to the first core member. Characterized in that There are accommodated.

  In this case, it is desirable that the filter member formed by pleating is made of glass fiber. Preferably, the first and second core members are formed in a cylindrical shape that forms an outer peripheral surface and an inner peripheral surface, respectively, and the plurality of intermediate core members are also formed in a cylindrical shape to form the first core member. Between the first core member and the second core member, the outer peripheral surface of the first core member constitutes the air inflow side, and the inner peripheral surface of the second core member flows out of the air. It is made the form which comprised the side.

  In addition, the width of the space portion formed from the first core member and the intermediate core member adjacent to the first core member toward the outflow side from the air inflow side is configured to be larger than the widths of the other space portions. It is desirable.

  According to the air filter device configured as described above, a breathable intermediate core member is provided between the breathable first core member constituting the air inflow side and the breathable second core member constituting the air outflow side. Are arranged in a partition shape and separated into a plurality of spaces from the inflow side to the outflow side of the air, so that the filter members respectively accommodated in the plurality of spaces do not interfere with each other. The filter action can be exhibited.

  That is, even if the upstream filter member into which air is sucked is reduced in air permeability due to adsorption of mist, the inner filter member is pressed against the air flow to prevent the fiber density from being increased. it can. Therefore, it is possible to avoid the problem that the inner filter member reduces the filter effect due to the compression action.

  Further, the air-permeable intermediate core member constituting the partition functions to guide the mist-like substance, for example, oil, adsorbed by the filter member in the direction of gravity. Therefore, the adsorbed oil can be recovered by dripping through the intermediate core member. In other words, it is possible to maintain the filtering function of each filter member over a long period of time by guiding the captured oil in the direction of gravity through the intermediate core member.

  In addition, since the filter member formed by pleating glass fiber is accommodated in the space formed by the first core member and the intermediate core member adjacent to the first core member, substantially the filter member A large surface area can be taken. Therefore, in the first filter member on the air inflow side where clogging is most likely to occur, the degree of clogging can be reduced, and an air filter device having excellent durability can be provided.

  Hereinafter, preferred embodiments of an air filter device according to the present invention will be described with reference to the drawings. 1 and 2 are sectional views showing an air filter device according to the present invention. That is, FIG. 1 is a cross-sectional view as viewed in the direction of the arrow from the line AA in FIG. 2, and FIG. 2 is a cross-sectional view as viewed from the line BB in the direction of the arrow in FIG.

  As shown in FIG. 1 and FIG. 2, the air filter device according to this embodiment is formed in a cylindrical shape as a whole, and its outer peripheral surface is air as shown by a white arrow in FIG. The inner peripheral surface constitutes the air outflow side. That is, in this embodiment, air flows in from the outer peripheral surface side formed in a cylindrical shape, and the air filtered by the filter member described later flows out to the inner peripheral surface side, and as shown in FIG. The part is configured to be led upward, for example.

  FIG. 3 is an enlarged cross-sectional view of a portion C shown in FIG. 2, and a first air-permeable core formed in a cylindrical shape on each of the air inflow side and the outflow side. A member 1 and a second breathable core member 2 are provided. The first and second core members constitute the outline of the air filter device. Each of the first and second core members is formed of a metal material in a cylindrical shape, and a large number of vent holes are arranged over the entire surface. Hereinafter, the first core member 1 may be referred to as an outer core member, and the second core member 2 may be referred to as an inner core member.

  A plurality of intermediate core members, that is, in this embodiment, two intermediate core members 3 and 4 are concentrically formed with the first and second core members between the first and second core members 1 and 2. It is arranged to be. These intermediate core members 3 and 4 also have a metal material formed in a cylindrical shape, like the first and second core members, and a large number of ventilation holes are arranged over the entire surface.

  Therefore, the intermediate core members 3 and 4 separate the space between the outer core member 1 and the inner core member 2 into a plurality of spaces from the air inflow side to the outflow side, and each of them is ventilated. Functions as a sex barrier.

  In this embodiment, the width of the space portion formed by the outer core member 1 and the intermediate core member 3 adjacent thereto and extending from the air inflow side to the outflow side is the width of the other space portion. It is configured larger than. The first and second core members 1 and 2 and the plurality of intermediate core members 3 and 4 are held by holder members 10 at their respective ends, and are configured to mechanically hold a concentric shape. Yes.

  Further, a gasket 11 is attached to a part of the holder member 10, and when the air filter device is mounted on a device such as an oil collector (not shown), the gasket 11 leaks air. Acts not to.

  Filter members are respectively disposed in the space portions formed by the first and second core members 1 and 2 and the intermediate core members 3 and 4 disposed therebetween. First, a filter member 9a formed by pleating glass fibers is accommodated in a wide space formed by the outer core member 1 and the intermediate core member 3 adjacent thereto.

  The filter member 9a is formed by forming a glass fiber into a mat shape and pleating the glass fiber, and the crease adjacent to the bellows shape formed by the pleating process is an outer core as shown in FIG. The members 1 and the intermediate core members 3 are arranged in a ring shape along the space so as to contact each other alternately.

  As a result, as described in the column of the effect of the invention described above, the surface area of the filter member can be substantially increased, and the occurrence of clogging is reduced in the first filter member on the air inflow side where clogging is most likely to occur. It is possible to provide an air filter device having excellent durability. In particular, when the filter member 9a is made of glass fiber, since it has low resistance, it is possible to make use of the characteristics that are efficient and difficult to be compressed and excellent in durability.

  Further, as shown in FIG. 3, between the intermediate core members 3 and 4, a filter member 9b in which glass fibers are formed in a mat shape through a cylindrical mesh member 5 formed in a net shape in the center. 9c is arranged. A mesh member 6 having the same configuration as that of the mesh member 5 is disposed on the outer periphery of the intermediate core member 4 so as to wind the intermediate core member 4.

  Further, between the intermediate core member 4 and the inner core member 2 are filter members 9d and 9e in which a nonwoven fabric is formed in a mat shape with a mesh member 7 having the same configuration as that of the mesh member 5 in the center. Has been placed. A mesh member 8 having the same configuration as that of the mesh member 5 is disposed on the outer periphery of the inner core member 2 so as to wind the inner core member 2.

  According to the air filter device of this embodiment, since the intermediate core members 3 and 4 are disposed between the outer core member 1 and the inner core member 2, as described in the column of the effect of the invention, Even if the air flow rate of the filter member on the upstream side of air is reduced due to adsorption of mist, it can be prevented from being pushed by the air flow and squeezing the inner filter member to increase the fiber density. The problem that the filter member on the inner side reduces the filter effect by the action can be avoided.

  Furthermore, in addition to the intermediate core members 3 and 4, mesh members 5 to 8 are interposed between the filter members, so that mist-like substances, for example, oil captured by the filter members are transferred to the intermediate core members and the meshes. The members 5 to 8 can be interposed and guided in the direction of gravity, so that the filtering function of each filter member can be maintained over a long period of time, and the oil recovery efficiency can be further increased.

  FIG. 4 schematically shows an example in which the above-described air filter device is used in an oil collector (separator) of an air compressor. A block denoted by reference numeral 21 represents an air compressor, for example, a screw type compressor. The compressor 21 is rotationally driven by a prime mover such as a motor 22 to convert the intake air Ai1 into compressed air Ai2, and the compressed air Ai2 is introduced into the oil recovery unit 23.

  A barrier plate (also called a baffle plate) 23a is disposed in the oil recovery unit 23, and oil mist contained in the compressed air Ai2 sent from the compressor 21 is first supplied to the barrier plate 23a. Acts to recover. An air filter device according to the present invention indicated by reference numeral 24 is installed in the oil recovery device 23, and secondary oil recovery is executed by the air filter device. The compressed air Ai2 through the air filter device 24 is discharged from the oil recovery unit 23 as compressed air Ai3 from which oil mist has been filtered.

  The oil recovered by the oil recovery device 23 is supplied to the bearing 21a of the air compressor 21 and the main body of the air compressor 21 through an oil cooler 25 as necessary. The oil recovered by the air filter device 24 is configured to return to the intake port for the intake air Ai1 of the air compressor 21.

  FIG. 4 described above shows one application example of the air filter device according to the present invention. The air filter device according to the present invention includes, for example, a water-soluble mist regardless of the oil recovery device described above. It can also be employed in air filter devices. That is, even if it is employed in an air filter device containing water-soluble mist or the like, the unique operational effects described in the column of the effect of the invention described above can be obtained.

  In addition, the air filter device according to the above-described embodiment is formed in a cylindrical shape as a whole. However, this is formed in a flat shape, and one surface constitutes an air inflow side and the other surface is air. It can also be set as the air filter apparatus which comprises the outflow side.

It is sectional drawing of the state which looked at the air filter apparatus concerning this invention in the arrow direction from AA shown in FIG. Similarly, it is sectional drawing of the state which looked at the air filter apparatus in the arrow direction from BB shown in FIG. It is sectional drawing which expanded and showed the C section in FIG. It is the schematic diagram which showed the employment example of the air filter apparatus concerning this invention.

Explanation of symbols

1 First core member (outer core member)
2 Second core member (inner core member)
3,4 intermediate core member 5-8 mesh member 5
9a to 9e Filter member 10 Holder member 11 Gasket 21 Air compressor 22 Motor 23 Oil recovery device 24 Air filter device 25 Oil cooler

Claims (4)

An air filter device for filtering air containing mist-like substances through a filter member, the first and second air-permeable core members respectively disposed on both the inflow side and the outflow side of the air; Each of the first and second core members is disposed between the first and second core members to separate the space between the first and second core members into a plurality of spaces from the air inflow side to the outflow side. A plurality of intermediate core members constituting the partition wall, and filter members respectively accommodated in the respective spaces formed by the first and second core members and the plurality of intermediate core members,
An air filter device, wherein a filter member formed by pleating is accommodated in a space formed by the first core member and the intermediate core member adjacent to the first core member.   The air filter device according to claim 1, wherein the filter member formed by pleating is made of glass fiber.   The first and second core members are formed in a cylindrical shape that constitutes an outer peripheral surface and an inner peripheral surface, respectively, and the plurality of intermediate core members are also formed in a cylindrical shape to form the first and second core members. Between the core members, the outer peripheral surface of the first core member constitutes the air inflow side, and the inner peripheral surface of the second core member constitutes the air outflow side. The air filter device according to claim 1 or 2, wherein the air filter device is provided.   The width of the space portion formed by the first core member and the intermediate core member adjacent thereto and extending from the air inflow side to the outflow side is configured to be larger than the widths of the other space portions. The air filter device according to any one of claims 1 to 3, wherein the air filter device is characterized.

Images