JP4777690B2 - Air filter - Google Patents

Description

  The present invention relates to an air filter for removing dust contained in air to be cleaned and cleaning the air.

  For example, in a paint drying process of an automobile production line, a drying chamber that dries paint applied to a vehicle body needs to have clean air inside. Therefore, dust or the like is contained in the drying chamber by an air filter. The removed air is appropriately supplied.

  And since such an air filter has a high temperature inside the drying chamber, it has excellent heat resistance, and if dust in the drying chamber adheres to the painted surface, it can cause poor coating. It is required to have excellent collection efficiency, and the pressure loss is small so that the load applied to the air blowing mechanism that supplies air into the drying chamber can be reduced or the air can be supplied even with a low-performance air blowing mechanism. That is also sought.

  Conventionally, as an air filter, what was disclosed by Unexamined-Japanese-Patent No. 2000-300909 (patent document 1), and what was disclosed by Unexamined-Japanese-Patent No. 2001-25625 (patent document 2) etc. is known, for example. Patent Document 1 discloses an air filter that removes dust and the like in the air, and Patent Document 2 discloses an air filter that removes oil in the air.

  The air filter of Patent Literature 1 includes a glass fiber sheet configured by mixing glass fibers and a binder at a predetermined ratio, and dust is removed by the glass fiber sheets.

  On the other hand, the air filter of Patent Document 2 is arranged in parallel with a predetermined interval, and is arranged between two flat first collecting nets having a large number of meshes, and between the first collecting nets. And two corrugated plate-like second collection nets, and oil is removed by each of these collection nets. In addition, each 2nd collection net | network is provided so that the formation direction of each crest (fold) of the wave part mountain side and the wave part valley side may each cross | intersect in the surface parallel to the surface of the said 2nd collection net | network. ing.

JP 2000-300909 A JP 2001-25625 A

  By the way, the air filter can cause clogging if the dust or oil removed by the use accumulates over a certain amount on the glass fiber sheet or each collection net. It is necessary to clean the collection net to remove accumulated dust and oil, or to replace it with an unused one.

  However, when the glass fiber sheet is washed, the washing cost is high, so that the running cost is high, the glass fiber is easily broken due to water pressure applied during washing, and the broken glass fiber is scattered outside. Since it is easy to do, there exists a problem that the dust removal performance after washing | cleaning falls. Furthermore, if the worker inhales the scattered glass fiber, there is a risk of causing health damage such as pneumoconiosis, and handling is necessary. On the other hand, even if the glass fiber sheet is replaced without cleaning, the cost of replacement parts is high, so that the running cost is high as in the case of cleaning.

  In addition, each collection net has no problem like the above glass fiber sheet, but the mesh is formed to a certain extent in order to prevent clogging by the collected oil, so it collects fine dust. There is a problem that can not be.

  For this reason, the development of a reusable air filter, which is an air filter suitable for removing dust and the like, has been desired.

  The present invention has been made in view of the above circumstances, and provides an air filter that is suitable for dust removal and is reusable, and also excellent in terms of heat resistance, collection efficiency, pressure loss, running cost, and the like. Is the purpose.

To achieve the above object, the present invention provides:
It consists of a three-layer structure of a first collection part, a second collection part, and a third collection part, and the air to be cleaned sequentially passes through the first collection part, the second collection part, and the third collection part. An air filter configured to circulate,
The first collection part is configured by knitting metal wires so as to have a large number of meshes, and a plurality of mesh members formed in a corrugated shape are provided in a laminated form,
The second collection part is formed by knitting metal wires so as to have a lot of meshes finer than the mesh member of the first collection part, and a plurality of mesh members formed in a flat plate shape are laminated. Provided in
The third collecting part is composed of a non-woven metal fiber having a rectangular cross section,
The third collection unit collects particles smaller than the particles collected by the first collection unit and the second collection unit that have passed through the first collection unit and the second collection unit. It is related with the air filter characterized by comprising.

  According to this invention, when the air to be cleaned is supplied to the first collection unit side of the air filter, the air sequentially passes through the first collection unit, the second collection unit, and the third collection unit. In the second collection part, since each mesh member is configured more finely than each mesh member of the first collection part, particles smaller than the first collection part are collected, In the 3rd collection part, since the nonwoven fabric is constituted so that particles smaller than the 1st collection part and the 2nd collection part may be collected, particles smaller than the 2nd collection part are collected. Is done. And the air which dust etc. were removed in each collection part and was cleaned is discharged | emitted from the 3rd collection part side outside.

  In the present invention, as described above, since the first collection unit and the second collection unit are configured by laminating a plurality of mesh members, the first collection unit and the second collection unit are also compared. It is possible to remove fine dust, and since each mesh member of the first collection part is formed in a corrugated plate shape, it is removed in the space formed between the laminated mesh members. As a result, the collected amount of dust can be increased while preventing the collection efficiency from being lowered and the pressure loss from being increased.

  Moreover, since such a 1st collection part and a 2nd collection part are provided as a pre-processing part of the 3rd collection part which consists of a nonwoven fabric, it prevents that a large dust is removed by the said nonwoven fabric. It is possible to prevent clogging of the nonwoven fabric.

  Moreover, since the nonwoven fabric of the 3rd collection part is comprised from the metal fiber whose cross section is a rectangular shape, the flow state of the air before and behind the said fiber part is compared with the general fiber whose cross section is circular. It is considered that the trapping efficiency can be increased by the flow of air. Even in the case where the cross section is circular, if the bulk density is high, a region in which air is disturbed can be formed in substantially the same manner as in the case where the cross section is rectangular, but the porosity is high because the bulk density is high. This causes a problem that the pressure loss is increased. Conversely, when the cross section is rectangular, even if the bulk density is low, it is possible to form a turbulent state of air over a wider range, effectively increasing the collection efficiency without increasing the pressure loss. It is thought that it can be increased.

  Moreover, since each mesh member of the 1st collection part and the 2nd collection part and the nonwoven fabric of the 3rd collection part are comprised from the metal, they are heat resistant, and also wash | clean and reuse easily. In addition, even if it is washed, the dust removal performance by each of the collecting parts does not deteriorate. There is no inconvenience in handling.

  Thus, according to the air filter according to the present invention, the three-layer structure including the first collecting portion, the second collecting portion, and the third collecting portion made of metal is used. Particles of a size corresponding to each are removed, so that dust in the air can be efficiently removed to prevent clogging, and the collected dust can be removed by washing. It can be removed and reused, and running costs can be greatly reduced.

  Therefore, according to the air filter of the present invention, the air filter can be an air filter for dust removal that is excellent in terms of heat resistance, collection efficiency, pressure loss, running cost, ease of handling, and the like. .

  In addition, in the metal wire which comprises each mesh member of the said 1st collection part and the 2nd collection part, and the material of the metal fiber which comprises the nonwoven fabric of the said 3rd collection part, each collection part is washed water It is preferable to use stainless steel or aluminum in order to make it difficult to rust even if it is repeatedly washed, and stainless steel is more excellent in heat resistance and corrosion resistance than aluminum. .

  As described above, according to the air filter of the present invention, the first collecting part in which a plurality of corrugated plate-like members are laminated, the second collecting part in which a plurality of flat plate-like members are laminated, and the third made of nonwoven fabric. While making the three-layer structure of the collection part, the non-woven fabric of the third collection part is composed of fibers having a rectangular cross section so that heat resistance, collection efficiency, pressure loss, running cost, ease of handling, etc. It can be set as the air filter for dust removal excellent in the surface.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional view showing a schematic configuration of an air filter according to an embodiment of the present invention, FIG. 2 is a bottom view in the direction of arrow A in FIG. 1, and FIG. It is a top view of a B direction.

  As shown in FIGS. 1 to 3, the air filter 1 of the present example is provided with a three-layer structure, and the first collection unit 11 and the second collection unit are configured so that the air to be cleaned flows sequentially. And a holding mechanism 20 that holds the first collecting unit 11, the second collecting unit 12, and the third collecting unit 13.

  In addition, as an example of the usage application of this air filter 1, although it can mention using for removing dust from the air supplied in a drying chamber in the paint drying process of an automobile production line, for example, The usage application of the air filter 1 is not limited to this.

  The first collection unit 11 is configured by knitting stainless steel wires so as to have a large number of meshes, and includes a plurality (8 in this example) of mesh-like members 11a formed in a corrugated plate shape. The mesh member 11a is laminated. Each mesh member 11a is provided as a set of four facing ones, and a laminated space S having a predetermined volume is formed between the tops of the laminated mesh members 11a on the wave part peak side and the wave part valley side. ing. The mesh member 11a can be formed, for example, by forming a mesh and a flat plate by knitting a stainless steel wire, and then forming it into a corrugated plate. Further, the mesh member 11a is waved so that the formation direction of the folds (the crests on the wave part mountain side and the wave part valley side) and the knitting direction of the stainless wire intersect in a plane parallel to the surface of the mesh member 11a. It is formed in a plate shape.

  The second collecting part 12 is formed by knitting a stainless steel wire so that the stainless steel wire has many meshes finer than the mesh member 11a of the first collecting part 11, and a reticulated member 12a formed in a flat plate shape. A plurality (10 in this example) are provided, and the mesh members 12a are stacked. For each mesh member 12a of the second collection part 12 and each mesh member 11a of the first collection part 11, for example, a so-called demister filter constituted by knitting stainless wire is used. Can do.

  The said 3rd collection part 13 is comprised from the nonwoven fabric of the stainless fiber whose cross section was a rectangular shape, The said 1st collection part 11 which passed the 1st collection part 11 and the 2nd collection part 12 And the particle | grains smaller than the particle | grains collected by the 2nd collection part 12 are comprised so that collection is possible. Incidentally, the stainless steel fiber having a rectangular cross section can be obtained by cutting the end surface of a stainless steel plate wound in a coil shape, for example, to obtain a stainless steel fiber having a dimension corresponding to the thickness and the cutting depth of the stainless steel plate. it can.

  The holding mechanism 20 includes a first holding wire net 21 provided on the surface of the first collection unit 11 opposite to the second collection unit 12 side, and a second collection unit 12 side of the third collection unit 13. A sheet-like second holding wire mesh 22 provided on the opposite surface of the second holding wire mesh 22, a third holding wire mesh 23 provided on the surface of the second holding wire mesh 22 opposite to the third collecting portion 13 side, and the first A holding frame 24 that holds the first collecting unit 11, the second collecting unit 12, the third collecting unit 13, and the second holding wire mesh 22 by the holding wire mesh 21 and the third holding wire mesh 23. Yes.

  The first holding wire mesh 21 and the third holding wire mesh 23 are made of a stainless steel wire mesh that is much coarser than the first collecting portion 11 and the second collecting portion 12, and the second holding wire mesh 22 is, for example, It is made of a stainless steel mesh of about 50 mesh and prevents the nonwoven fabric from being deformed as undulated by the air flowing through the nonwoven fabric of the third collecting section 13 or the third holding wire mesh 23.

  The holding frame 24 is formed of a rectangular and frame-shaped stainless steel member, and both end portions (end portions on the first holding wire mesh 21 and the third holding wire mesh 23 side) are formed to protrude to the center side. The peripheral edges of the first holding wire mesh 21 and the third holding wire mesh 23 are provided on the inner side of the projecting portion 24a, and the first holding wire mesh 21 and the third holding wire mesh 23 are engaged with each other. The collection unit 11, the second collection unit 12, the third collection unit 13, and the second holding wire net 22 are held.

  According to the air filter 1 of the present example configured as described above, when air to be cleaned is supplied from the first holding wire net 21 side, the air is collected in the first collection unit 11 and the second collection unit. Part 12 and the third collection part 13 are sequentially distributed. In the second collection part 12, each mesh member 12 a is finer than each mesh member 11 a of the first collection part 11. Particles smaller than the collection part 11 are collected, and in the third collection part 13, the nonwoven fabric can collect particles smaller than the first collection part 11 and the second collection part 12. 2 Particles smaller than the collection part 12 are collected. Then, the air that has been cleaned by removing dust and the like in each of the collection units 11, 12, 13 passes through the second holding wire mesh 22 and is discharged to the outside from the third holding wire mesh 23 side.

  As described above, in the air filter 1 of the present example, the first collection unit 11 and the second collection unit 12 are configured by laminating a plurality of mesh members 11a and 12a. It is possible to remove relatively fine dust also in the part 11 and the second collection part 12, and since each mesh member 11a of the first collection part 11 is formed in a corrugated shape, it is laminated. The removed dust can be deposited in the laminated space S formed between the crests and the crests of the net member 11a, thereby reducing the collection efficiency and reducing the pressure loss. It is possible to increase the amount of dust collected while preventing the increase.

  Moreover, since such a 1st collection part 11 and the 2nd collection part 12 are provided as a pre-processing part of the 3rd collection part 13 which consists of a nonwoven fabric, it is that a big dust is removed by the said nonwoven fabric. It is possible to prevent the nonwoven fabric from being clogged.

  Moreover, since the nonwoven fabric of the 3rd collection part 13 is comprised from the metal fiber whose cross section is a rectangular shape, the flow state of the air before and behind the said fiber part is made into the general fiber whose cross section is circular. Compared to this, it is considered that the state can be more disturbed and the collection efficiency can be increased by the flow of air. Even in the case where the cross section is circular, if the bulk density is high, a region in which air is disturbed can be formed in substantially the same manner as in the case where the cross section is rectangular, but the porosity is high because the bulk density is high. This causes a problem that the pressure loss is increased. Conversely, when the cross section is rectangular, even if the bulk density is low, it is possible to form a turbulent state of air over a wider range, effectively increasing the collection efficiency without increasing the pressure loss. It is thought that it can be increased.

  In addition, the respective net-like members 11a and 12a of the first collecting unit 11 and the second collecting unit 12, the nonwoven fabric of the third collecting unit 13, the first holding wire net 21, the second holding wire mesh 22 and the third of the holding mechanism 20. Since the holding wire mesh 23 and the holding frame 24 are made of stainless steel, they are heat resistant and can be easily washed and reused. The dust removal performance due to the water does not deteriorate, and it can be made difficult to rust even if washed repeatedly with washing water. There is no inconvenience in handling.

  Thus, according to the air filter 1 of the present example, the three-layer structure including the first collection unit 11, the second collection unit 12, and the third collection unit 13 made of stainless steel is used. Since the parts 11, 12, and 13 remove particles having a size corresponding to each of them, dust in the air can be efficiently removed to prevent clogging and cleaning. Thus, the collected dust can be removed and reused, and the running cost can be greatly reduced.

  Therefore, according to the air filter 1 of the present example, the air filter 1 is made into an air filter 1 for removing powder that is excellent in terms of heat resistance, collection efficiency, pressure loss, running cost, ease of handling, and the like. Can do.

  Incidentally, when the relationship between the air velocity of the air supplied to each air filter and the pressure loss was measured for the air filter 1 of this example and the conventional air filter provided with the glass fiber sheet, the solid line in FIG. The results shown in (Air filter 1 of this example) and broken line (conventional air filter provided with a glass fiber sheet) were obtained.

  In addition, for each of the above air filters, the dust supply amount and pressure loss were measured under the condition that the wind speed was 2.5 m / s by the test method based on JIS B 9908 Type 3 (mass method) and the test dust based on JIS Z 8901 15 types. And the relationship between the amount of dust supply and the collection efficiency were obtained, and the results shown in FIGS. 4B and 4C were obtained. 4 (b) and 4 (c), the solid line and the broken line indicate the air filter 1 of this example and the conventional air filter provided with the glass fiber sheet, respectively, as in FIG. 4 (a). The dust supply amount is the amount of dust in the air supplied toward the air filter.

  And in each graph obtained in this way, when the air filter 1 of this example and the conventional air filter provided with the glass fiber sheet are compared, the air filter 1 of this example has low pressure loss, It can be easily understood that the collection efficiency does not change so much. Therefore, it can be said from this graph that the air filter 1 of this example is excellent in terms of collection efficiency and pressure loss.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect which this invention can take is not limited to this at all.

  The air filter 1 of this example is made of stainless steel and is excellent in heat resistance and corrosion resistance so that it can be used in the paint drying process of the automobile production line. The mesh members 11a and 12a of the collection unit 11 and the second collection unit 12 are made of aluminum wires instead of stainless steel wires, or the nonwoven fabric of the third collection unit 13 is made of aluminum fibers instead of stainless steel fibers. It may be configured.

  In the above example, the number of the net-like members 11a stacked in the first collecting unit 11 is set to eight, and the number of the net-like members 12a stacked in the second collecting unit 12 is set to ten. The number of layers of the mesh members 11a, 12a in 12 is not limited to these.

  Moreover, the lamination | stacking method of each mesh member 11a in the 1st collection part 11 is not limited to the above example, The formation direction of each mesh member 11a is parallel to the surface of the mesh member 11a, respectively. You may laminate | stack so that it may cross | intersect in a plane. Even in this case, a predetermined volume of space is formed above the top of the mesh member 11a on the corrugated mountain side and below the top of the corrugated valley side, so that the removed dust is deposited in the space as described above. It is possible to increase the amount of dust collected while preventing the collection efficiency from decreasing and the pressure loss from increasing.

It is sectional drawing which showed schematic structure of the air filter which concerns on one Embodiment of this invention. It is a bottom view of the arrow A direction in FIG. FIG. 3 is a plan view of the arrow B direction. It is a graph for comparing the air filter of this example with the conventional air filter provided with the glass fiber sheet, Comprising: The relationship between a wind speed and pressure loss, the relationship between dust supply amount and pressure loss, and dust supply amount It is the graph which showed the relationship between and collection efficiency, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air filter 11 1st collection part 11a Mesh member 12 2nd collection part 12a Mesh member 13 3rd collection part 20 Holding mechanism 21 1st holding wire net 22 2nd holding wire mesh 23 3rd holding wire mesh 24 Holding frame

Claims (2)

It consists of a three-layer structure of a first collection part, a second collection part, and a third collection part, and the air to be cleaned sequentially passes through the first collection part, the second collection part, and the third collection part. An air filter configured to circulate,
The first collection part is configured by knitting metal wires so as to have a large number of meshes, and a plurality of mesh members formed in a corrugated shape are provided in a laminated form,
The second collection part is formed by knitting metal wires so as to have a lot of meshes finer than the mesh member of the first collection part, and a plurality of mesh members formed in a flat plate shape are laminated. Provided in
The third collecting part is composed of a non-woven metal fiber having a rectangular cross section,
The third collection unit collects particles smaller than the particles collected by the first collection unit and the second collection unit that have passed through the first collection unit and the second collection unit. An air filter configured as described above.   The metal wires constituting the respective net members of the first collection part and the second collection part and the metal fibers constituting the nonwoven fabric of the third collection part are each made of stainless steel. The air filter according to claim 1.

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