WO2010050782A2 - Filter assembly - Google Patents

Filter assembly Download PDF

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Publication number
WO2010050782A2
WO2010050782A2 PCT/KR2009/006354 KR2009006354W WO2010050782A2 WO 2010050782 A2 WO2010050782 A2 WO 2010050782A2 KR 2009006354 W KR2009006354 W KR 2009006354W WO 2010050782 A2 WO2010050782 A2 WO 2010050782A2
Authority
WO
WIPO (PCT)
Prior art keywords
welding
filter
housing
filter housing
rib
Prior art date
Application number
PCT/KR2009/006354
Other languages
English (en)
French (fr)
Other versions
WO2010050782A3 (en
Inventor
In-Tak Lee
Original Assignee
Woongjin Coway 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 Woongjin Coway Co., Ltd. filed Critical Woongjin Coway Co., Ltd.
Priority to CN200980143941.8A priority Critical patent/CN102202760B/zh
Priority to EP09823862A priority patent/EP2361132A4/de
Publication of WO2010050782A2 publication Critical patent/WO2010050782A2/en
Publication of WO2010050782A3 publication Critical patent/WO2010050782A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/005—Making filter elements not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/08—Construction of the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions

Definitions

  • the present invention relates to a filter assembly.
  • a water treatment apparatus filters water to remove heavy metals or foreign substances contained in the water.
  • the water treatment apparatus may include a water purifier, a bidet, a humidifier, a dish washer, and a refrigerator having a water purification system.
  • At least one filter assembly may be installed in the water treatment apparatus in order to filter water.
  • a housing cap may be welded to the filter housing.
  • the filter housing and the housing cap are separately manufactured using molds and are then welded together.
  • FIG. 7 is a view illustrating a coupled structure of a filter housing and a housing gap in a conventional filter assembly.
  • a welding recess 12 is formed in the outer periphery of one side of a filter housing
  • a welding rib 22 is formed along the outer periphery of a housing cap 20 so that the welding rib 22 is inserted into the welding recess 12.
  • the welding rib 22 of the housing cap 20 corresponds to the welding recess 12 of the filter housing 10.
  • the housing cap 20 is rotated, the welding rib 22 and the welding groove 12 are rubbed together so that the welding rib 22 and the welding groove 12 are welded together.
  • the filter housing 10 needs to have a minimum thickness, thereby increasing the thickness of the entire filter housing 10. Furthermore, as the thickness of the filter housing 10 increases, the weight, manufacturing costs and logistical costs of the filter assembly are significantly increased.
  • the welding rib 22 may be inserted into the welding recess 12 at an unusual position. This may cause a welding failure because the housing cap 20 is abnormally welded to the filter housing 10.
  • incomplete welding may occur due to the tolerance of the jig.
  • the welding rib 22 has three surfaces, that is, side surfaces and an end surface, which increases welding time. [9] In addition, it is difficult to determine whether the filter housing and the housing cap are normally welded. Therefore, when a minute welding error occurs in the filter assembly, an additional test is conducted to determine whether a welding failure occurs or not, thereby reducing productivity and requiring additional equipment. Disclosure of Invention Technical Problem
  • An aspect of the present invention provides a filter assembly that can improve productivity and reduce the thickness and weight of a filter housing by a new design of a welding portion.
  • An aspect of the present invention also provides a filter assembly that can minimize welding failures even when external shocks are applied or the tolerance of a jig occurs during a welding process.
  • An aspect of the present invention also provides a filter assembly that facilitates checking whether a welding failure has occurred in the filter assembly in a manufacturing process.
  • a filter assembly including: a filter housing having a hollow therein and a welding rib provided along a periphery of one side thereof; a filter member arranged inside the filter housing and filtering water flowing into the filter housing; and a housing cap having a welding recess in which the welding rib is inserted, the welding recess being smaller than the welding rib so that the welding rib is welded to the welding groove as both sides of the welding rib are rubbed against both sides of the welding recess.
  • Both sides of the welding rib may be tapered.
  • Both sides of the welding groove may be tapered so that the welding rib is slid and inserted into the welding groove in an exact welding position.
  • a guide portion may be provided along one end of the housing cap in order to prevent tolerance from occurring when the welding rib is inserted into the welding groove.
  • a welding depth determination portion may be provided along an outer surface of the filter housing so that the welding depth determination portion corresponds to an end of the guide portion when the housing cap and the filter housing are normally welded together.
  • a distance between an end of the filter housing and the welding depth determination portion may be greater than a distance between an opening of the welding groove of the filter housing cap and the end of the guide portion by a welding depth.
  • the welding depth determination portion may have a circular shape along a circum- ferential direction of the filter housing.
  • the thickness and weight of a filter housing can be reduced.
  • a welding failure can be minimized even when external shocks are applied or the tolerance of a jig occurs during a welding process.
  • productivity can be improved by shortening the time required for a process of manufacturing a filter assembly as well as the time required for a process of manufacturing a filter housing.
  • it can be checked during a manufacturing process whether a welding failure has occured in a filter assembly.
  • FIG. 1 is a perspective view illustrating a filter assembly according to an exemplary embodiment of the present invention.
  • FIG. 2 is an exploded sectional view illustrating the filter assembly of FIG. 1.
  • FIG. 3 is an exploded sectional view illustrating a welding structure of the filter housing and the housing cap, shown in FIG. 2.
  • FIG. 4 is a cross-sectional view illustrating a state in which one end of the filter housing of FIG. 2 is inserted into a guide portion of the housing cap.
  • FIG. 5 is a cross-sectional view illustrating a state in which the housing cap is inserted into the filter housing before the filter housing and the housing cap of FIG. 2 are welded together.
  • FIG. 6 is a cross-sectional view illustrating a state in which the housing cap is welded to the filter housing of FIG. 2.
  • FIG. 7 is a view illustrating a coupled structure of a filter housing and a housing gap in a conventional filter assembly.
  • FIG. 1 is a perspective view illustrating a filter assembly.
  • FIG. 2 is an exploded sectional view illustrating the filter assembly of FIG. 1.
  • a filter assembly 100 includes a filter housing 110, a filter member 120 and a housing cap 130.
  • the filter housing 110 has a hollow therein.
  • An inlet housing cap 111 may be formed integrally with the water inlet side of the filter housing 110.
  • This filter housing 110 may have a cylindrical shape.
  • An inlet pipe 112 may protrude from the inlet housing cap 111 so as to be connected to a water pipe (not shown).
  • a plurality of support ribs (not shown) may be formed in a radial manner inside the inlet housing cap 111. Therefore, water can pass between the support ribs.
  • the filter member 120 is detachably arranged in the filter housing 110.
  • an inlet cover 121 may be coupled to the end of the water inlet side of the filter member 120
  • a discharge cover 125 may be coupled to the end of the water discharge side of the filter member 120.
  • the housing cap 130 is arranged at one end of the filter housing 110.
  • a discharge pipe 131 may be formed at the center of the housing cap 130 so that the discharge pipe 131 is coupled to a discharge purification pipe (not shown).
  • the filter housing 110 and the housing cap 130 may be formed of various kinds of synthetic resins, such as polypropylene.
  • FIG. 3 is an exploded sectional view illustrating a welding structure of a filter housing and a housing cap.
  • a welding rib 115 may be formed along the periphery of one end of the filter housing 110.
  • the inner and outer surfaces of the welding rib 115 are tapered in cross-section so that the welding rib 115 is wedge-shaped.
  • the entire shape of the welding rib 115 may be a circular ring-shaped cross section.
  • the welding rib 115 having a relatively smaller width than the filter housing 110, is only formed on one end of the filter housing 110 without forming a welding recess and a structure (ribs formed in both sides of the welding recess) around the welding recess, the entire thickness of the filter housing 110 can be relatively reduced.
  • the thickness of the filter housing 110 can be reduced by approximately 30 to 50% as compared to the film assembly in the related art.
  • Both sides of the welding rib 115 may be tapered.
  • the welding rib 115 may be wedge-shaped so that the thickness thereof decreases toward the end.
  • the welding recess 135 may be formed in the housing cap 130 so that the welding rib
  • the entire shape of the welding recess 135 may have a circular ring cross section.
  • the welding recess 135 is smaller than the welding rib 115. Therefore, as the housing cap 130 is rotated and both sides of the welding rib 115 are rubbed against both sides of the welding recess 135, the welding rib 115 is welded to the welding recess 135.
  • the filter housing 110 is further placed into the housing cap 130 to a predetermined distance (hereinafter, referred to as "welding depth") as the welding rib 115 is melted when being welded.
  • Both sides of the welding recess 135 may be tapered. As both sides of the welding recess 135 are tapered, the welding recess 135 is wider toward the opening thereof. Here, the opening of the welding recess 135 may be rounded so that the welding rib 115 is smoothly guided into the welding recess 135.
  • the housing cap 130 may be located at a slightly inclined position in the filter housing 110 when a small tolerance occurs in the jig, the rotation center of the housing cap 130 may not coincide with that of the filter housing 110.
  • the welding rib 115 of the filter housing 110 is slid along one or both sides of the welding recess 135, the rotation center of the housing cap 130 can be appropriately compensated.
  • both sides of the welding recess 135 are tapered, and both sides of the welding rib 115 are tapered, even when the housing cap 130 is inserted at a slightly inclined position, the insertion of the housing cap 130 can be facilitated.
  • a guide portion 137 may be formed in one end of the housing cap 130 so that the filter housing 110 can be inserted into the housing cap 130 while the outer circumferential surface of the filter housing 110 makes contact with the guide portion 137.
  • the guide portion 137 may have a cylindrical shape.
  • the guide portion 137 allows the housing cap 130 to be inserted into the filter housing 110 while the housing cap 130 is parallel with a longitudinal direction of the filter housing 110. Further, the guide portion 137 prevents the generation of tolerance when the welding rib 115 is inserted intothe welding recess 135.
  • a welding depth determination portion 117 may be formed on the outside of the filter housing 110 so that the welding depth determination portion 117 corresponds to the end of the guide portion 137 when the housing cap 130 and the filter housing 110 have been normally welded together.
  • a distance Ll between the end of filter housing 110 and the welding depth determination portion 117 may be longer than a distance L2 between the opening of the welding recess 135 of the housing cap 130 and the end of the guide portion 137 by the welding depth (L1>L2).
  • the welding depth determination portion 117 is formed along a circumferential direction of the filter housing 110.
  • the welding depth determination portion 117 may have a circular shape.
  • FIG. 4 is a cross-sectional view illustrating a state in which an end of a filter hosing is inserted into a guide portion of a housing cap.
  • the filter housing 110 is raised using a jig, and the housing cap 130 is put on one end of the filter housing 110 with the use of the jig.
  • the guide portion 137 of the housing cap makes contact with and is inserted into the outer circumferential surface of one side of the filter housing 110.
  • the housing cap 130 may rarely be shaken because the housing cap 130 is guided by the guide portion 137 and may be inserted into the filter housing 110 in a direction nearly parallel with the longitudinal direction of the filter housing 110.
  • FIG. 5 is a cross-sectional view illustrating a state in which the housing cap is inserted into the filter housing before the filter housing and the housing cap are welded together.
  • the welding rib 115 of the filter housing 110 is engaged in the welding recess 135 of the housing cap 130.
  • both sides of the welding rib 115 and both sides of the welding recess 135 are tapered, the welding rib 115 of the filter housing 110 is accurately engaged in the welding recess 135 of the housing cap 130. Therefore, even when external shocks are applied to the filter housing 110 and the housing cap 130 or tolerance occurs, the welding rib 115 can be accurately inserted into the welding recess 135.
  • the welding rib 115 of the housing cap 130 is rubbed against both sides of the welding recess 135. Since the welding rib 115 has a greater thickness than the welding recess 135, both sides of the welding rib 115 are rubbed against both sides of the welding recess 135.
  • FIG. 6 is a cross-sectional view illustrating a state in which a housing cap is welded to a filter housing.
  • the molten material is created in greater profusion on the friction surfaces of the welding rib 115 and the welding recess 13.
  • the jig stops the operation of the housing cap 130.
  • both sides of the welding rib 115 and both sides of the welding recess 135 are welded together with the molten material.
  • the welding time can be shortened because the welding rib 115 has two welding surfaces (both side surfaces) compared to when the welding rib 115 has three welding surfaces (both side surfaces and end surface).
  • a portion in which the welding rib 115 and the welding recess 135 are welded together is denoted by reference numeral 138.
  • An aspect of the present invention can reduce the thickness and weight of a filter housing and allows checking in advance whether there is an error in a welding process of a filter assembly, thereby ensuring significant industrial applicability.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Filtration Of Liquid (AREA)
  • Manipulator (AREA)
  • General Details Of Gearings (AREA)
PCT/KR2009/006354 2008-10-31 2009-10-30 Filter assembly WO2010050782A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200980143941.8A CN102202760B (zh) 2008-10-31 2009-10-30 过滤器组件
EP09823862A EP2361132A4 (de) 2008-10-31 2009-10-30 Filterbaugruppe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0108081 2008-10-31
KR1020080108081A KR101094803B1 (ko) 2008-10-31 2008-10-31 필터 어셈블리

Publications (2)

Publication Number Publication Date
WO2010050782A2 true WO2010050782A2 (en) 2010-05-06
WO2010050782A3 WO2010050782A3 (en) 2010-07-29

Family

ID=42129490

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2009/006354 WO2010050782A2 (en) 2008-10-31 2009-10-30 Filter assembly

Country Status (5)

Country Link
EP (1) EP2361132A4 (de)
KR (1) KR101094803B1 (de)
CN (1) CN102202760B (de)
MY (1) MY149265A (de)
WO (1) WO2010050782A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200459641Y1 (ko) * 2010-08-20 2012-04-04 권진철 필터유닛의 융착구조
KR101222616B1 (ko) * 2011-05-11 2013-02-05 주식회사 마이크로필터 무분진 저수 용기
SG11201401179PA (en) * 2011-10-03 2014-04-28 Entegris Inc Modular filtration system
MY174750A (en) 2012-10-01 2020-05-13 Entegris Inc Purifier cassette
DE102013101727A1 (de) * 2013-02-21 2014-09-04 R.Stahl Schaltgeräte GmbH Gehäuse mit einer Rotationsreibschweißnaht

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005099862A1 (en) 2004-04-05 2005-10-27 3M Innovative Properties Company Hot disconnect replaceable water filter assembly

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200292958Y1 (ko) * 2002-07-23 2002-10-25 이평호 정수기용 필터의 캡 결합구조
US20040094468A1 (en) * 2002-11-20 2004-05-20 Karl Fritze Freeze resistant water filter
KR100476096B1 (ko) * 2002-12-12 2005-03-10 웅진코웨이주식회사 정수기용 필터
AU2004268929A1 (en) * 2003-05-02 2005-03-10 3M Innovative Properties Company Crossflow filtration system with quick dry change elements
US7534348B2 (en) * 2003-09-12 2009-05-19 Fenwal, Inc. Flow-through removal device and system using such device
KR100515927B1 (ko) * 2003-09-18 2005-09-21 주식회사 산청 단일체의 플라스틱 케이스로 이루어진 정화통
US7506666B2 (en) * 2005-04-29 2009-03-24 3M Innovative Properties Company Anti-drip ring and drip seal
KR100828857B1 (ko) * 2005-11-09 2008-05-09 신연홍 정수 필터
KR100939097B1 (ko) * 2007-01-29 2010-01-28 이성주 파팅라인과 언더컷이 없는 정수기 필터의 제조방법 및유니버설 필터 하우징
US7662283B2 (en) * 2008-03-21 2010-02-16 Pentair Filtration, Inc. Modular drinking water filtration system with locking arrangement to assure filter cartridge compatibility

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005099862A1 (en) 2004-04-05 2005-10-27 3M Innovative Properties Company Hot disconnect replaceable water filter assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2361132A4

Also Published As

Publication number Publication date
MY149265A (en) 2013-08-15
EP2361132A2 (de) 2011-08-31
KR20100048775A (ko) 2010-05-11
WO2010050782A3 (en) 2010-07-29
KR101094803B1 (ko) 2011-12-16
EP2361132A4 (de) 2012-04-25
CN102202760B (zh) 2014-12-03
CN102202760A (zh) 2011-09-28

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