WO2022014466A1 - 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
WO2022014466A1
WO2022014466A1 PCT/JP2021/025821 JP2021025821W WO2022014466A1 WO 2022014466 A1 WO2022014466 A1 WO 2022014466A1 JP 2021025821 W JP2021025821 W JP 2021025821W WO 2022014466 A1 WO2022014466 A1 WO 2022014466A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
base material
material layer
filter pack
filter medium
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/JP2021/025821
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
和也 関
嗣郎 林
仁 新沼
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 JP2022536309A priority Critical patent/JP7692913B2/ja
Priority to EP21842059.4A priority patent/EP4183469A4/en
Priority to CN202180048804.7A priority patent/CN115803095A/zh
Priority to US18/015,174 priority patent/US12551835B2/en
Publication of WO2022014466A1 publication Critical patent/WO2022014466A1/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
    • B01D46/523—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
    • 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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces

Definitions

  • the hot melt adhesive such as a thermoplastic resin is required to be softened in order to enhance the adhesiveness with the filter medium.
  • the hot melt resin is softened in order to obtain adhesiveness, the lower portion of the spacing member may expand laterally after transfer, and a desired shape may not be obtained.
  • the present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a filter pack capable of appropriately maintaining a pleated interval while suppressing an increase in pressure loss, and an air filter provided with the filter pack.
  • the filter pack according to the present invention collects fine particles in a gas and has a plurality of pairs of ventilation surfaces that are continuously opposed to each other through folds that are alternately repeated by pleating.
  • a spacing member that maintains the spacing between the pair of ventilation surfaces, and is formed on at least one of the pair of ventilation surfaces so as to extend in a direction orthogonal to the crease. It comprises at least one spacing forming layer formed on the layer and a spacing member comprising.
  • the air filter according to the present invention is a frame surrounding the filter pack so that the filter pack and the folds of the filter medium of the filter pack are arranged on the upstream side and the downstream side in the airflow direction passing through the filter medium. And.
  • the pleated interval can be suitably maintained while suppressing an increase in pressure loss.
  • FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG.
  • FIG. 1 is an external perspective view showing an air filter 1 according to an example of the present embodiment.
  • FIG. 2 is a diagram showing a part of the folded filter pack 3 in a directional view in which the folds of the pleats extend.
  • FIG. 3 is a diagram showing a ventilation surface 14b on which the spacing member 20 is formed.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.
  • the air filter 1 includes a filter pack 3 and a frame body 5.
  • the frame 5 surrounds the filter pack 3 so that the folds of the filter medium 11 of the filter pack 3 are arranged on the upstream side and the downstream side in the airflow direction (X direction) passing through the filter medium 11.
  • the filter pack 3 has a filter medium 11 and a plurality of spacing members 20.
  • the filter medium 11 is, for example, a fiber body made of glass fiber, organic fiber, or a mixed fiber of these fibers, and is, for example, a non-woven fabric or felt.
  • the filter medium 11 made of glass fiber is produced, for example, by making paper 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 melt blow method, a thermal bond method, a chemical bond method, or the like. Further, the filter medium 11 may be, for example, a laminate of a plurality of non-woven fabrics having different collection efficiencies.
  • the filter medium 11 is pleated into a substantially V shape so that mountain folds and valley folds are repeated alternately. Pleat processing is performed using a reciprocating type or rotary type folding machine or the like.
  • the filter medium 11 is pleated and has a mountain fold portion 12 formed of creases and a valley fold portion 13 formed of folds, which are parallel to each other. Further, the filter medium 11 has a plurality of pairs of ventilation surfaces 14a and 14b that continuously face each other via the mountain fold portion 12 or the valley fold portion 13.
  • the crease located on the upstream side ( ⁇ X direction) of the airflow is referred to as a mountain fold portion 12
  • the crease located on the downstream side of the airflow (+ X direction) is referred to as a valley fold portion 13.
  • the interval holding member 20 is made of, for example, a thermoplastic resin called a hot melt adhesive.
  • a thermoplastic resin include polyamide-based, urethane-based, and olefin-based thermoplastic resins.
  • the spacing member 20 is formed by, for example, using a gun filled with a softened hot melt adhesive and directly applying the hot melt adhesive to the filter medium 11 in a direction orthogonal to the crease of the filter medium 11.
  • the space forming layer has a function of making the base material layer 21 bear the adhesiveness of the space holding member 20 to the ventilation surface 14b and forming a required height as the space holding function of the space holding member 20. I let 22 carry it.
  • the base material layer 21 can be formed by applying an amount of hot melt adhesive that does not reduce the effective area of the filter medium 11 and can obtain the required adhesiveness with the filter medium 11.
  • the spacing forming layer 22 is made of the same material as the base material layer 21, it has better adhesiveness than the filter medium 11 and is not required to be softer than the base material layer 21. Therefore, the interval forming layer 22 has good moldability without dripping on the filter medium 11 side after coating, and it is easy to apply a desired amount. As a result, the spacing forming layer 22 can be controlled to a desired height.
  • Such a filter pack 3 and an air filter 1 can suitably maintain a pleated interval while suppressing an increase in pressure loss. That is, since the space holding member 20 has a multi-stage structure of the base material layer 21 and the space forming layer 22, the space holding member 20 does not reduce the effective area of the filter medium 11 as compared with the case of the one-stage structure. Further, since the interval holding member 20 is formed intermittently in the direction orthogonal to the crease, the area covering the filter medium 11 can be reduced. As a result, the filter pack 3 and the air filter 1 can reduce the increase in pressure loss due to the reduction of the ventilation surface 14b due to the provision of the space holding member 20.
  • FIG. 5 which shows a filter pack 3 as a modification corresponding to FIG. 2, at least a part of each other's surfaces on both ventilation surfaces 14a and 14b of the pair of ventilation surfaces 14a and 14b facing each other.
  • the interval holding member 20 may be arranged so as to come into contact with each other.
  • the space holding member 20 By arranging the space holding member 20 on both the ventilation surfaces 14a and 14b, the height of each space holding member 20 can be lowered as compared with the case where the space holding member 20 is provided only on one of the ventilation surfaces.
  • the presence or absence of the spacing forming layer 22 and the number of layers may be appropriately determined according to the required spacing between the ventilation surfaces 14a and 14b.
  • the base material layer 21 is formed by being divided into two rows (plural rows) in a direction orthogonal to the crease.
  • the interval forming layer 22 may be formed so as to straddle the.
  • the "width in the direction parallel to the crease direction of the contact surface between the base material layer and the filter medium" is the distance d in FIG. That is, when the base material layer 21 is formed by being divided into a plurality of rows, it means the total length of the base material layer 21 in the width direction.
  • the "width in the direction parallel to the crease direction of the contact surface with the base material layer" of the spacing forming layer 22 is the distance D.
  • the spacing forming layer 22 is applied so as to straddle the two rows of the base material layers 21 and fit between the two rows of the base material layers 21. Therefore, the positioning of the interval forming layer 22 is easy, and the hot melt adhesive forming the interval forming layer 22 leaks from the distance d in the width direction of the base material layer 21 to reduce the effective area of the filter medium 11. Can be avoided.
  • the base material layer 21 it is not necessary to form the base material layer 21 with a uniform thickness, and the thermoplastic resin may be formed with a thickness and an amount required for the portion required for adhesion to the spacing forming layer 22.
  • FIG. 7 which shows the spacing member 20 as another modification corresponding to FIG. 4, the amount of resin in the center of the base material layer 21 in the width direction is reduced, and the spacing forming layer 22 is accommodated.
  • a dent 21b may be formed.
  • the positioning of the space forming layer 22 can be facilitated, and at the same time, the adhesive area of the base material layer 21 and the space forming layer 22 can be increased, and the adhesiveness can be improved.
  • the interval holding member 20 may be made of a material such as urethane, rubber, resin, ceramic, or the like, which is formed by applying it on the filter medium 11 in a softened state instead of the hot melt adhesive.
  • the spacing member 20 may be continuously formed without being intermittently formed in the direction orthogonal to the crease.
  • the space forming layer may be laminated on the base material layer. That is, there may or may not be a portion consisting of only the base material layer 21 such as the spacing member 20.
  • Even in the length direction (substantially X direction) of the space holding member 20, the length of the contact surface 22a between the space forming layer 22 and the base material layer 21 is the length of the contact surface 21a between the base material layer 21 and the filter medium 11. It may be formed as follows.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
PCT/JP2021/025821 2020-07-16 2021-07-08 フィルタパックおよびそれを備えるエアフィルタ Ceased WO2022014466A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2022536309A JP7692913B2 (ja) 2020-07-16 2021-07-08 フィルタパックおよびそれを備えるエアフィルタ
EP21842059.4A EP4183469A4 (en) 2020-07-16 2021-07-08 FILTER BLOCK AND AIR FILTER EQUIPPED WITH IT
CN202180048804.7A CN115803095A (zh) 2020-07-16 2021-07-08 过滤器组合件和具备该过滤器组合件的空气过滤器
US18/015,174 US12551835B2 (en) 2020-07-16 2021-07-08 Filter pack and air filter provided with same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020122391 2020-07-16
JP2020-122391 2020-07-16

Publications (1)

Publication Number Publication Date
WO2022014466A1 true WO2022014466A1 (ja) 2022-01-20

Family

ID=79555432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/025821 Ceased WO2022014466A1 (ja) 2020-07-16 2021-07-08 フィルタパックおよびそれを備えるエアフィルタ

Country Status (6)

Country Link
US (1) US12551835B2 (https=)
EP (1) EP4183469A4 (https=)
JP (1) JP7692913B2 (https=)
CN (1) CN115803095A (https=)
TW (1) TWI886308B (https=)
WO (1) WO2022014466A1 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022215590A1 (ja) * 2021-04-09 2022-10-13 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
WO2025205690A1 (ja) * 2024-03-28 2025-10-02 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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003284914A (ja) * 2002-03-28 2003-10-07 Nippon Muki Co Ltd ジグザグ状エアフィルタ用濾材及びその製造方法
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
JP2011125832A (ja) * 2009-12-21 2011-06-30 Toyota Boshoku Corp フィルタの製造方法及び製造装置
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

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE4038966A1 (de) * 1990-12-06 1992-06-11 Hengst Walter Gmbh & Co Kg Filterelement, bestehend aus einem in falten gelegten filtermedium
JP2000107539A (ja) * 1998-10-01 2000-04-18 Daikin Ind Ltd エアフィルターパックおよびエアフィルター
US6685833B2 (en) * 2000-09-21 2004-02-03 Lpd Technologies, Inc. Fluid filter element
TW503773U (en) 2001-12-11 2002-09-21 Chin Yun Entpr Co Ltd Improved core of air filter for automobile
JP4733340B2 (ja) * 2003-04-24 2011-07-27 日本エアー・フィルター株式会社 折込み型エアフィルタ及びその製造方法
JP2007098233A (ja) * 2005-09-30 2007-04-19 Nippon Muki Co Ltd ジグザグ状エアフィルタ用濾材およびエアフィルタ
JP2014113532A (ja) 2012-12-07 2014-06-26 Nitto Denko Corp フィルタ濾材およびフィルタ濾材の製造方法
US11253807B2 (en) * 2016-06-06 2022-02-22 3M Innovative Properties Company Channel-framed, pleated air filter with bridging filaments

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003284914A (ja) * 2002-03-28 2003-10-07 Nippon Muki Co Ltd ジグザグ状エアフィルタ用濾材及びその製造方法
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
JP2011125832A (ja) * 2009-12-21 2011-06-30 Toyota Boshoku Corp フィルタの製造方法及び製造装置
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4183469A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022215590A1 (ja) * 2021-04-09 2022-10-13 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
WO2025205690A1 (ja) * 2024-03-28 2025-10-02 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

Also Published As

Publication number Publication date
JP7692913B2 (ja) 2025-06-16
JPWO2022014466A1 (https=) 2022-01-20
US12551835B2 (en) 2026-02-17
EP4183469A4 (en) 2024-05-22
CN115803095A (zh) 2023-03-14
TWI886308B (zh) 2025-06-11
TW202206170A (zh) 2022-02-16
US20230249117A1 (en) 2023-08-10
EP4183469A1 (en) 2023-05-24

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