WO2022215590A1 - フィルタパックおよびそれを備えるエアフィルタ - Google Patents

フィルタパックおよびそれを備えるエアフィルタ Download PDF

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Publication number
WO2022215590A1
WO2022215590A1 PCT/JP2022/015356 JP2022015356W WO2022215590A1 WO 2022215590 A1 WO2022215590 A1 WO 2022215590A1 JP 2022015356 W JP2022015356 W JP 2022015356W WO 2022215590 A1 WO2022215590 A1 WO 2022215590A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
upstream
ventilation surfaces
downstream
ventilation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/015356
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
和也 関
拓夢 神宮字
嗣郎 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Muki Co Ltd
Original Assignee
Nippon Muki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Muki Co Ltd filed Critical Nippon Muki Co Ltd
Priority to JP2023512958A priority Critical patent/JPWO2022215590A1/ja
Priority to EP22784574.0A priority patent/EP4306201A4/en
Priority to US18/284,932 priority patent/US20240181378A1/en
Priority to CN202280026838.0A priority patent/CN117222464A/zh
Priority to KR1020237037793A priority patent/KR20230167390A/ko
Publication of WO2022215590A1 publication Critical patent/WO2022215590A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/522—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with specific folds, e.g. having different lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds

Definitions

  • the present invention relates to a filter pack comprising pleated filter media and an air filter comprising the same.
  • Patent Literature 1 discloses a filter pack that maintains an interval by contact between opposing interval maintaining members.
  • the spacing member has the effect of maintaining the pleat spacing of the filter pack, it increases the pressure loss by covering the ventilation surface of the filter medium.
  • the spacing members do not contact each other unless the positioning and dimensional accuracy are obtained when forming the spacing members and when pleating, and as a result, the pleat spacing is uniform. There is also a risk that it will not be maintained.
  • the present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a filter pack and an air filter equipped with the same, which can maintain the pleat spacing appropriately while suppressing an increase in pressure loss.
  • the filter pack of the present disclosure collects fine particles in the gas, folds alternately repeated on the upstream side and downstream side of the airflow by pleating, and the folds on the downstream side at least one pair of upstream ventilation surfaces facing each other via the crease on the upstream side and into which the airflow flows, and at least one pair of downstream ventilation surfaces facing each other via the crease on the upstream side and from which the airflow flows out.
  • a filter medium and a plurality of spacing members formed on each of said upstream ventilation surfaces and each of said downstream ventilation surfaces for retaining the spacing between each of said pair of upstream ventilation surfaces and each of said pair of downstream ventilation surfaces; , wherein the plurality of spacing members formed on the upstream ventilation surface are intermittently formed in a direction orthogonal to the folds, and at least one of the pair of upstream ventilation surfaces is formed on one of the pair of upstream ventilation surfaces.
  • the spacing member contacts at least one spacing member formed on the other pair of upstream ventilation surfaces at two or more points.
  • FIG. 1 is an external perspective view showing an air filter that is an embodiment of the air filter of the present invention
  • FIG. FIG. 4 is a view showing a portion of the folded filter pack as viewed in the direction in which the folds of the pleats extend.
  • FIG. 3 is a partially enlarged view of FIG. 2;
  • FIG. 4 is a partially enlarged view of a filter pack as a first modified example;
  • FIG. 11 is a partially enlarged view of a filter pack as a second modified example;
  • FIG. 11 is a filter pack as a third modified example, showing a part of the folded filter pack as viewed in the direction in which folds of pleats extend.
  • FIG. 11 is a filter pack as a fourth modified example, showing a part of the folded filter pack as viewed in the direction in which folds of pleats extend.
  • FIG. 1 is an external perspective view showing an air filter 1 that is an embodiment of the air filter of the present invention.
  • FIG. 2 is a view showing a portion of the folded filter pack 3 as viewed from the direction in which fold lines 12 and 13 of the pleats extend (upper view). 3 is a partially enlarged view of FIG. 2.
  • FIG. 1 is an external perspective view showing an air filter 1 that is an embodiment of the air filter of the present invention.
  • FIG. 2 is a view showing a portion of the folded filter pack 3 as viewed from the direction in which fold lines 12 and 13 of the pleats extend (upper view). 3 is a partially enlarged view of FIG. 2.
  • FIG. 1 is an external perspective view showing an air filter 1 that is an embodiment of the air filter of the present invention.
  • FIG. 2 is a view showing a portion of the folded filter pack 3 as viewed from the direction in which fold lines 12 and 13 of the pleats extend (upper view). 3 is a partially enlarged view of FIG. 2.
  • FIG. 1 is an external perspective view
  • the air filter 1 has a filter pack 3 and a frame 5.
  • the frame 5 surrounds the filter pack 3 so that the creases 12 and 13 of the filter media 11 of the filter pack 3 are arranged upstream and downstream in the air flow direction (X direction) passing through the filter media 11 .
  • the filter pack 3 has filter media 11 and a plurality of spacing members 20 .
  • the filter medium 11 is a member that collects fine particles in gas.
  • the filter medium 11 is used, for example, to remove dust having a particle size of 2.5 ⁇ m or less and a concentration of 0.3 mg/m 3 or less.
  • the filter medium 11 has, for example, a collection efficiency of 80% or more according to a counting method, a pressure loss of 79 to 493 Pa, and a dust holding capacity (dust holding amount) of 200 to 800 g/m 2 .
  • measurement is performed by blowing air containing particles of any of atmospheric dust, polyalphaolefin (PAO), and silica with a particle size of 0.3 ⁇ m.
  • the dust holding capacity is the amount of dust that the filter collects before reaching a given final pressure drop.
  • the filter medium 11 may also be, for example, a filter medium for a HEPA filter, a filter medium for a ULPA filter, or a filter medium for a gas removal filter.
  • the filter medium 11 is, for example, a fibrous body made of glass fiber, organic fiber, or a mixture of these fibers, such as nonwoven fabric or felt.
  • the filter medium 11 made of glass fibers is produced by papermaking, for example, by a wet method or a dry method.
  • the filter medium 11 made of organic fibers is produced by, for example, a spunbond method, a meltblown method, a thermal bond method, a chemical bond method, or the like.
  • the filter medium 11 may be, for example, a laminate of a plurality of nonwoven fabrics having different collection efficiencies.
  • the filter medium 11 is pleated in a substantially V shape so that mountain folds and valley folds are alternately repeated. Pleating is performed using a reciprocating or rotary folding machine or the like.
  • the filter medium 11 has folds 12 and 13 parallel to each other on the upstream and downstream sides of the air flow due to the pleating process. Further, the filter medium 11 has a plurality of pairs of ventilation surfaces 14 (ventilation surfaces 14a, 14b) that are continuous via the folds 12, 13 and face each other substantially in the Y direction.
  • the ventilation surface 14 has a plurality of (at least one) pair of upstream ventilation surfaces 15a, 15b and a pair of downstream ventilation surfaces 16a, 16b.
  • a pair of upstream ventilation surfaces 15a and 15b are ventilation surfaces 14 that face each other across a fold line 13 on the downstream side and into which an airflow flows.
  • the pair of downstream ventilation surfaces 16a and 16b are ventilation surfaces 14 that face each other across the fold line 12 on the upstream side and from which the airflow flows.
  • the upstream ventilation surfaces 15a and 15b and the downstream ventilation surfaces 16a and 16b are simply referred to as the ventilation surfaces 14 when not distinguished from each other.
  • the interval holding members 20 are a plurality of members that hold the interval (pleat interval) set between the pair of ventilation surfaces 14 of the filter medium 11 .
  • the spacing members 20 are intermittently formed on the ventilation surface 14 in a direction (substantially X direction) orthogonal to the direction along the folds 12 and 13 . In FIG. 2, for example, three spacing members 20 are intermittently formed on the ventilation surface 14a.
  • At least one spacing member 20 formed on one pair of ventilation surfaces 14 contacts at least one spacing member 20 formed on the other pair of ventilation surfaces 14 at two or more points.
  • the spacing member 20a formed on the ventilation surface 14b contacts the plurality of adjacent spacing members 20b, 20c formed on the ventilation surface 14a at two contact points 23, 23. As shown in FIG.
  • the spacing member 20 formed on one pair of ventilation surfaces 14 has a facing surface 25 facing the spacing member 20 formed on the other pair of ventilation surfaces 14 .
  • the facing surface 25 is, for example, a flat tip surface of the spacing member 20 .
  • the opposing surface 25a of the spacing member 20a formed on the ventilation surface 14b contacts the opposing surfaces 25b and 25c of the spacing members 20b and 20c formed on the ventilation surface 14a, approximately in the X direction. It is preferable that the sum of the lengths d1 and d2 along the X direction is 1% or more and 10% or less of the length D along the substantially X direction of the facing surface 25a.
  • the contact portion 23 is small, and there is a risk that the effect of maintaining the gap will be reduced. If it is more than 10%, the dimension of the spacing member 20 becomes large, and as a result, the area covering the ventilation surface 14 becomes large, resulting in an increase in pressure loss when the filter is used.
  • the spacing members 20 have different heights (substantially Y-direction lengths) depending on the pleat spacing. Specifically, in FIG. 2, since the pleat spacing between the pair of ventilation surfaces 14a and 14b increases from the fold line 12 toward the fold line 13, the height of the spacing member 20 on the fold line 12 side is small, and the fold line The height of the spacing member 20 on the 13 side is large.
  • the spacing member 20 is made of, for example, a thermoplastic resin called hot-melt adhesive.
  • thermoplastic resins include polyamide-based, urethane-based, and olefin-based thermoplastic resins.
  • the spacing members 20 are formed by directly applying the hot melt adhesive to the filter media 11 substantially in the X direction of the filter media 11 using, for example, a gun filled with softened hot melt adhesive. Further, the spacing member 20 may be formed by, for example, adhering a solidified hot-melt adhesive to the filter medium 11 instead of directly applying it. Also, the spacing member 20 may be made of another material such as ceramic.
  • the spacing member 20 formed on one pair of ventilation surfaces 14 is located at two locations with respect to the spacing member 20 formed on the other pair of ventilation surfaces 14. contact with.
  • the filter pack 3 can easily maintain the pleat spacing compared to the case of contact at one point. That is, when the spacing member 20 contacts only at one point, for example, the positions of the spacing member 20 arranged on the pair of ventilation surfaces 14 may deviate due to manufacturing errors, and there may be a case where the spacing member 20 does not contact. . In this case, the pleat spacing may not be maintained, and the filter efficiency may decrease.
  • the filter pack 3 and the air filter 1 can preferably maintain the pleat interval while suppressing an increase in pressure loss.
  • one spacing member 20 formed on one pair of ventilation surfaces 14 is connected to a plurality of adjacent spacing members 20 formed on the other pair of ventilation surfaces 14 .
  • An example of making contact point by point has been described.
  • one spacing member 20 formed on one pair of ventilation surfaces 14 may be in contact with one spacing member 20 formed on the other pair of ventilation surfaces 14 at a plurality of locations.
  • one spacing member 20d formed on the other pair of ventilation surfaces 14d has two projecting shapes 26 projecting in the height direction.
  • the spacing members 20e formed on one pair of the ventilation surfaces 14e are in contact with the protrusions 26 at two locations. Note that the number of contact points 23 may be two or more.
  • the spacing member 20f formed on one of the ventilation surfaces 14f is positioned substantially in the X direction. may be provided in a point shape (substantially hemispherical shape) with a short length.
  • the spacing member 20g formed on the other ventilation surface 14g contacts the adjacent two or more opposing spacing members 20f at two or more points.
  • the spacing members 20e and 20g formed on one of the pair of ventilation surfaces 14e and 14g of the pair of ventilation surfaces 14 are at least one formed on the other ventilation surface 14d and 14f.
  • the filter pack can be included in the scope of the present invention even if the other spacing member 20d, 20f is supported at one point, as long as the other spacing member 20d, 20f is supported at two points.
  • the spacing members 20 are intermittently formed substantially in the X direction on both the upstream ventilation surfaces 15a and 15b and the downstream ventilation surfaces 16a and 16b.
  • the spacing members 20 may be formed continuously in substantially the X direction.
  • FIG. 6 shows a filter pack 103 as a third modified example, and is a view showing a portion of the folded filter pack 103 as viewed in the direction in which the creases of the pleats extend.
  • FIGS. 6 and 7 configurations and parts corresponding to those of the filter pack 3 are denoted by the same reference numerals, and overlapping descriptions are omitted.
  • the difference between the filter pack 103 and the filter pack 3 is that the spacing members 120b formed on the downstream ventilation surfaces 116a and 116b are formed continuously, not intermittently, substantially in the X direction. That is, the spacing members 120b that are adjacent substantially in the X direction are formed in close contact with each other without forming a gap.
  • the filter pack 103 is continuously ventilated, there is a possibility that the internal structure of the filter pack 103 will change even if the external appearance of the filter pack 103 does not change.
  • the pair of upstream ventilation surfaces 115a and 115b of the filter pack 103 may swell toward the outflow side due to the inflowing air flow, increasing the pleat spacing between the pair of upstream ventilation surfaces 115a and 115b.
  • the filter pack 103 is formed with the spacing members 120a and 120b so as to increase the strength of the filter medium 11 while taking into account the advantage of suppressing an increase in pressure loss as in the filter pack 3. That is, the spacing members 120a formed on the upstream ventilation surfaces 115a and 115b are intermittently formed substantially in the X direction, and the spacing members 120b formed on the downstream ventilation surfaces 116a and 116b are substantially in the X direction. formed continuously. The spacing member 120b contacts the facing surface 125 of the opposing spacing member 120b at the rise 121 with respect to the downstream ventilation surfaces 116a and 116b from the upstream side to the downstream side.
  • the spacing member 120b can prevent the pair of upstream ventilation surfaces 115a and 115b from swelling toward the outflow side while ensuring the ventilation area, so that the pleat spacing at the start of use can be maintained. Moreover, since the strength of the filter pack 103 is increased, the stability of the shape is improved even during continuous ventilation, and as a result, an increase in pressure loss can be suppressed.
  • one spacing member 120b may be formed in an elongated shape over substantially the X direction of the downstream ventilation surfaces 116a and 116b.
  • Air filters 3 103, 203 Filter pack 5 Frame 11 Filter media 12, 13 Crease 14 Ventilation surfaces 20, 120 Spacing member 23 Contact points 25, 125 Opposing surface 26 Projection shape

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
PCT/JP2022/015356 2021-04-09 2022-03-29 フィルタパックおよびそれを備えるエアフィルタ Ceased WO2022215590A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2023512958A JPWO2022215590A1 (https=) 2021-04-09 2022-03-29
EP22784574.0A EP4306201A4 (en) 2021-04-09 2022-03-29 FILTER PACKAGE AND AIR FILTER EQUIPPED WITH IT
US18/284,932 US20240181378A1 (en) 2021-04-09 2022-03-29 Filter pack and air filter provided with same
CN202280026838.0A CN117222464A (zh) 2021-04-09 2022-03-29 过滤器组合件和具备该过滤器组合件的空气过滤器
KR1020237037793A KR20230167390A (ko) 2021-04-09 2022-03-29 필터팩 및 그것을 구비하는 에어필터

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021066458 2021-04-09
JP2021-066458 2021-04-09

Publications (1)

Publication Number Publication Date
WO2022215590A1 true WO2022215590A1 (ja) 2022-10-13

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ID=83545514

Family Applications (1)

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PCT/JP2022/015356 Ceased WO2022215590A1 (ja) 2021-04-09 2022-03-29 フィルタパックおよびそれを備えるエアフィルタ

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Country Link
US (1) US20240181378A1 (https=)
EP (1) EP4306201A4 (https=)
JP (1) JPWO2022215590A1 (https=)
KR (1) KR20230167390A (https=)
CN (1) CN117222464A (https=)
TW (1) TW202304582A (https=)
WO (1) WO2022215590A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025192679A1 (ja) * 2024-03-13 2025-09-18 日本無機株式会社 オイルミスト用エアフィルタ

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JP2010149055A (ja) * 2008-12-25 2010-07-08 Nippon Muki Co Ltd プリーツ型エアフィルタパック及びそれを用いたエアフィルタ
JP2016087515A (ja) * 2014-10-31 2016-05-23 ダイキン工業株式会社 曲げ加工用エアフィルタ、エアフィルタパック、エアフィルタユニット、および、曲げ加工用エアフィルタの製造方法
WO2018062194A1 (ja) * 2016-09-30 2018-04-05 ダイキン工業株式会社 エアフィルタ濾材、エアフィルタパック、およびエアフィルタユニット
WO2020079882A1 (ja) * 2018-10-17 2020-04-23 日本無機株式会社 フィルタパック、及びエアフィルタ
JP2021159872A (ja) * 2020-03-31 2021-10-11 日本無機株式会社 エアフィルタ、及びフィルタパック
WO2022014466A1 (ja) * 2020-07-16 2022-01-20 日本無機株式会社 フィルタパックおよびそれを備えるエアフィルタ

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JP2016087515A (ja) * 2014-10-31 2016-05-23 ダイキン工業株式会社 曲げ加工用エアフィルタ、エアフィルタパック、エアフィルタユニット、および、曲げ加工用エアフィルタの製造方法
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Also Published As

Publication number Publication date
TW202304582A (zh) 2023-02-01
US20240181378A1 (en) 2024-06-06
EP4306201A4 (en) 2025-03-26
KR20230167390A (ko) 2023-12-08
JPWO2022215590A1 (https=) 2022-10-13
CN117222464A (zh) 2023-12-12
EP4306201A1 (en) 2024-01-17

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