JP2006281132A - Filter in dust removing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve problems wherein, though efficient dust removing is attained by increasing filtering area by forming a filter disposed in a dust removing device in zigzag, the filter deflects by air resistance to impair dust removing effect by contact of filter faces of an air passing side each other. <P>SOLUTION: In a main filter 8, form retaining materials 9 are packed inside a filter body 8a formed bag-like. Even if the filter body 8a receives load in the crushing direction by resistance of air passing through the main filter 8, the bag-like form is maintained with little deformation. As a result, even if spaces S between the adjacent filter bodies 8a are made small, no problem is caused, efficient dust removing is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a filter in a dust removing device that removes dust (dust) generated in the air at a work site in a factory or a construction room, and discharges and circulates clean air from which the dust has been removed to the site again. Belongs to the technical field.

Today, it is used in homes and offices, and is used as a dust removal device that collects and removes dust scattered in the air and discharges clean air without dust. There is known one that purifies the air through the air (see, for example, Patent Document 1). However, in this case, it is not preferable from the viewpoint of pollution to discard the collected water contaminated with dust as it is, and it is required to separate the water and dust for disposal.
Therefore, the applicant of the present invention installs a dust removal device in parallel at the work site, sucks air containing dust generated by the work, removes the dust in the sucked air with a filter, and cleans the dust that has been removed. There is provided a device in which air is supplied again to the work site so as to improve the work environment at the work site (see, for example, Patent Document 2). In this device, dust collected on the filter is struck down with a vibrating rod, and the struck dust is collected and discarded, thereby simplifying filter maintenance and extending the filter life.
JP-A-9-168714 JP-A-9-85574

In the above, the air flow path is formed by the wind generated by the suction fan (blower). However, the suction fan is disposed downstream of the filter so that dust does not adhere to the suction fan. In this case, when a flexible material such as cloth is used for the filter, the filter is bent in a concave shape on the downstream side of the flow path due to air resistance passing therethrough.
By the way, it is preferable to increase the filter area to achieve efficient dust removal. In this case, it is proposed to form the filter in a zigzag shape, but the filter is bent by receiving the air resistance. In this case, there is a problem that the filter surfaces on the side through which air has passed come into contact with each other and the dust removal effect is impaired. To avoid this, the gap between the filters is increased or the filter is reinforced with a frame such as a metal frame. However, in the case of the former, there is a problem that the apparatus becomes small and compact, and in the case of the latter, there is a problem that the reinforcement of the filter becomes troublesome and complicated. There is.

The present invention was created in view of the above-described circumstances in order to solve these problems, and the invention of claim 1 includes a filter chamber provided with a filter, and air in the filter chamber. In the dust removing device configured by sequentially arranging a suction fan for suction from the upper side of the air flow path generated by the operation of the suction fan, the filter is a bag-shaped filter body having an opening on the suction fan side A filter in a dust removing device, wherein the filter main body is filled with a flexible shape-retaining material having a high air passage rate.
The invention of claim 2 is the filter in the dust removing device according to claim 1, wherein the filter is configured by connecting a plurality of filter bodies in parallel.
A third aspect of the present invention is the nonwoven fabric according to any one of the first or second aspect, wherein the shape retaining material is formed by three-dimensionally adhering highly elastic fibers in a state where the air passage rate is higher than that of the filter. It is a filter in the dust removal apparatus characterized by being.

According to the first aspect of the present invention, even if the filter receives a load in the direction in which the filter main body is crushed due to the air resistance to pass through, the bag state is maintained with almost no deformation. Good dust removal will be possible.
By setting it as invention of Claim 2, since the ventilation area of a filter becomes large, clogging of a filter can be prevented.
By setting it as invention of Claim 3, a filter can be formed in what has sufficient intensity | strength, and ventilation of the air which passed the filter can be made easy.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a filter chamber of the dust removing device A. A casing 2 constituting the filter chamber 1 has a rectangular shape, and a pre-filter 4 is provided in a suction port 3a opened in the front plate 3. ing. The pre-filter 4 includes a metal filter 4a and a rectangular lattice frame 4b. The metal filter 4a is formed in a mat shape by intertwining fibrous wires made of a plurality of metals or the like formed in a curl shape, and the periphery is held by the lattice frame 4b. The lattice frame 4b has a shape corresponding to the suction port 3a and is set to be detachable from the suction port. A communication hole 5 a provided in the ceiling plate 5 of the casing 2 is connected to a duct 6 and a suction fan 7 is disposed in the duct 6. When the suction fan 7 is driven, air is sucked into the filter chamber 1 in the casing 2 through the pre-filter 4, and the sucked air is discharged out of the apparatus from the discharge port 6 a provided at the front end of the duct 6. (See FIG. 2) An air flow path is formed. In the duct 6 of the present embodiment, the discharge port 6a is provided above the suction fan 7. However, the duct 6 may be set to extend forward (see the chain line portion in FIG. 2).

  Reference numeral 8 denotes a main filter installed in the filter chamber 1, and the main filter 8 closes the bottom of a filter ground made of a filter cloth material for filtration (the mesh of the filter ground is adjusted by the dust particle size to be removed). A plurality of filter main bodies 8a formed in a bag shape so that the downstream side of the flow path (upper side in the drawing) is opened by forming a rectangular hollow shape (in this embodiment, one set of five bags as described later) Are connected in parallel (stripes) with appropriate intervals. In the filter chamber 1, the dust-containing air sucked from the pre-filter 4 is removed by passing from the outside to the inside of the bag-like filter body 8 a, and the dust-removed air passes through the duct discharge port 6 a. It is discharged into the room as clean air and circulated.

9 is a shape retaining material for the filter main body 8a. The shape retaining material 9 is made of a highly elastic fiber that is curled and has a larger space ratio (void ratio) (90% or more) and air than the main filter 8. Main filter main body because it is flexible and has a shape-retaining function, and is formed into a nonwoven fabric by three-dimensionally adhering in a random manner or entangled in a spongy shape with a high passage rate Even if 8a receives the air resistance by the air suction of the suction fan 7, it is set so as not to be crushed. The shape retaining material 9 is formed in a rectangular shape corresponding to the filter main body 8a, and is inserted and incorporated into the filter main body 8a in a filling state, but the shape retaining material 9 is incorporated into the filter main body 8a. The setting is made by inserting the shape-retaining material 9 from the opening on the downstream side of the flow path of the filter body 8a and bringing it into contact with the bottom of the filter body 8a. Therefore, positioning when the shape maintaining material 9 is inserted into the filter body 8a can be easily performed.
The shape retaining member 9 is inserted and incorporated in the bag of the filter body 8a, that is, on the air passage side of the main filter 8. Incidentally, as the shape-retaining material, it is preferable that the shape-retaining material has high elasticity in order to enhance the shape-retaining function, and examples thereof include synthetic fibers such as nylon fibers and polyvinylidene chloride fibers. Natural fibers such as can also be used.

  The main filter 8 is formed as a set of five filter main bodies 8a. A flange (ear part, flange part) extending in the horizontal direction is formed on the peripheral part on the opening 8b side of the filter main body 8a. ) 8c. The main filter 8 is an upper support piece 10 that is detachably provided on the upper side of the lower support piece 2a in a state where the flange portion 8c is placed on the lower support piece 2a provided on the inner surface of the casing 2. It is designed to be incorporated by pinching. Incidentally, in the present embodiment, the lower support piece 2a and the upper support piece 10 are set to be tightened by the clamp 11.

  Reference numeral 13 denotes a vibrating bar. The vibrating bar 13 is arranged between the filter main bodies 8a and shakes off dust adhering to the main filter 8 by vibration operation. For example, the vibrating bar 13 is connected to the vibrating bar 13. The body 14 can be vibrated by converting the rotational drive of the motor 13a into a linear movement by the crank mechanism 13b, and the dust that has been shaken down falls to a collecting case 15 provided at the lower end of the casing 2. It is to be accumulated. The vibrating body 14 is set so as to vibrate for a certain time (for example, 20 seconds to 30 seconds) when the operation of the suction fan 7 is stopped due to work stoppage or the like. Further, the dust shaken off from the main filter 8 by the vibration operation floats inside the case body 2, but the dust floating in the direction of passing through the prefilter 4 toward the indoor side 4 is prevented from being received by the inner surface side portion, and does not leak into the room through the prefilter 4, and a special shutter mechanism and a shutter opening / closing mechanism can be omitted by using the prefilter 4. This contributes to improved function durability and cost reduction.

In the present embodiment configured as described above, the dust-containing air is sucked into the filter chamber 1 from the pre-filter 4 by the suction operation of the suction fan 7, and the dust-removed air is removed again by the main filter 8. However, since the main filter 8 is filled with the shape-retaining material 9 inside the bag-shaped filter main body 8a, the main filter 8 receives the air resistance passing through the main filter 8 and receives the filter main body. Even if a load in the direction in which 8a is crushed is received, the bag state is maintained with almost no deformation. As a result, there is no problem even if the main filter 8 has a small gap S between adjacent filter bodies 8a, and efficient dust removal can be performed.
Further, the shape retaining material 9 has flexibility, and vibrations are amplified by bending following the vibration operation by the vibrating body 14, so that the dust removal of the main filter 8 can be performed efficiently.

It is a perspective view of a dust removal apparatus. It is a partial cross section side view of a dust removal apparatus. (A), (B), (C) is a partial front sectional view of the main part of the dust removing device, respectively, XX sectional view of FIG. 3 (A), and a partial detail view of FIG. 3 (B). .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter chamber 2 Casing 2a Lower side support piece 4 Pre filter 6 Duct 6a Exhaust port 7 Suction fan 8 Main filter 8a Filter body 8c Eave part 9 Shape holding material 10 Upper support piece 13 Vibrating rod A Dust removal device

Claims (3)

In a dust removing device configured by sequentially arranging a filter chamber provided with a filter and a suction fan for sucking air into the filter chamber from the upper side of an air flow path generated by the operation of the suction fan The filter is configured by using a bag-like filter main body opened on the suction fan side, and the filter main body is filled with a shape retaining material having a high air passage rate and flexibility. A filter in a dust removing device. 2. The filter in the dust removing device according to claim 1, wherein the filter is configured by connecting a plurality of filter bodies in parallel. 3. The shape holding material according to claim 1, wherein the shape-retaining material is a non-woven fabric formed by three-dimensionally adhering highly elastic fibers in a state where the air passage rate is higher than that of a filter. Filter in dust removal device.

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