CA2614251A1 - Fan cooling unit for cooling electronic components - Google Patents

Fan cooling unit for cooling electronic components Download PDF

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Publication number
CA2614251A1
CA2614251A1 CA002614251A CA2614251A CA2614251A1 CA 2614251 A1 CA2614251 A1 CA 2614251A1 CA 002614251 A CA002614251 A CA 002614251A CA 2614251 A CA2614251 A CA 2614251A CA 2614251 A1 CA2614251 A1 CA 2614251A1
Authority
CA
Canada
Prior art keywords
cooling unit
unit according
fan cooling
layer
fan
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.)
Granted
Application number
CA002614251A
Other languages
French (fr)
Other versions
CA2614251C (en
Inventor
Robert Schwarz
Christiane Rudolf
Wai Sing Poon
Jason William Muller
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.)
WL Gore and Associates GmbH
Original Assignee
W.L. Gore & Associates Gmbh
Robert Schwarz
Christiane Rudolf
Wai Sing Poon
Jason William Muller
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 W.L. Gore & Associates Gmbh, Robert Schwarz, Christiane Rudolf, Wai Sing Poon, Jason William Muller filed Critical W.L. Gore & Associates Gmbh
Publication of CA2614251A1 publication Critical patent/CA2614251A1/en
Application granted granted Critical
Publication of CA2614251C publication Critical patent/CA2614251C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20181—Filters; Louvers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1692—Other shaped material, e.g. perforated or porous sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof

Abstract

A fan cooling unit (10) for cooling electronic components, such as for an air-cooled telecommunications base station, comprises a protective covering for at least the air inlet opening (11) of a casing (8) in which the electronic components are housed. The protective covering (1) has a frame (2) into which a composite filter media (3) is mounted so as to create an air-tight fit. The composite filter media (3) comprises a membrane filtration layer (20) with a porous polymeric membrane, such as expanded polytetrafluoroethylene (ePTFE), and at least one depth filtration layer (18) disposed on an upstream side of the membrane filtration layer (20). The depth filtration media layer comprises fibers having an electrostatic charge. The ePTFE membrane is preferably made from a blend of a PTFE homopolymer and a modified PTFE polymer.

Claims (24)

1. Fan cooling unit (100) for cooling electronic components (7), comprising a casing (8) to take the electronic components (7), at least one air inlet opening (11) and at least one air outlet opening (12) in the casing (8), at least one fan (6) to produce a flow of air from the air inlet opening (11) through the casing (8) to the air outlet opening (12), and at least one pro-tective covering (1) to entirely cover at least the air inlet opening (11) for removal of particles from an air stream entering the casing (8), said pro-tective covering comprising a composite filter media (3) and a frame (2) into which the composite filter media (3) is mounted so as to create an air-tight fit between the filter media (3) and the frame (2), wherein the fil-ter media (3) comprises a membrane filtration layer (20) comprising a porous polymeric mem-brane, and at least one depth filtration media layer (18) comprising fibers and dis-posed on an upstream side of the membrane filtration layer (20) relative to a direction of gas flow through the filter, wherein the fibers of the depth filtration media layer (18) preferably have an electrostatic charge.
2. Fan cooling unit according to claim 1, wherein the membrane filtration layer (20) comprises porous polytetrafluloroethylene (ePTFE).
3. Fan cooling unit according to any of claims 1 or 2, wherein a support layer (22) is disposed on the upstream or downstream side of and adja-cent to the membrane filtration layer (20).
4. Fan cooling unit according to claim 3, wherein the support layer (22) is laminated to the membrane filtration layer (20).
5. Fan cooling unit according to any of claims 1 to 4, wherein the at least one depth filtration media layer (18) comprises a non-woven fibrous polymeric web.
6. Fan cooling unit according to claim 5, wherein the non-woven fibrous polymeric web is a melt blown web.
7. Fan cooling unit according to any of claims 1 to 6, wherein the membrane filtration layer has a permeability of at least 7 Frazier, more preferably of at least about 30 Frazier, most preferably of 60 Frazier or greater.
8. Fan cooling unit according to any of claims 1 to 7, wherein each of the at least one depth filtration media layer 18 has a permeability of at least about 30 Frazier, more preferably of at least about 100 Frazier.
9. Fan cooling unit according to any of claims 1 to 8, comprising a stabiliz-ing layer (23) adjacent to and on the upstream side of the at least one depth filtration media layer (18) to prevent disarrangement of the fibers in the at least one depth filtration media layer (18).
10. Fan cooling unit according to any of claims 1 to 9, wherein the composite filter media (3) has a particle filtration efficiency of at least 90% for 0.3 micron sized particles at a face velocity of 10 cm/s or below.
11. Fan cooling unit according to any of claims 1 to 10, wherein the mem-brane filtration layer (20) and the at least one depth filtration media layer (18) are pleated.
12. Fan cooling unit according to claim 11, wherein the filter media (3) is shaped as a pleated panel.
13. Fan cooling unit according to claim 12, wherein two edges of the panel are joined to form a cylindrical filter media.
14. Fan cooling unit according to any of claims 1 to 13, wherein the mem-brane filtration layer (20) is a microporous polytetrafluoroethylene (ePTFE) membrane having an internal microstructure consisting essen-tially of a series of nodes interconnected by fibrils, wherein the nodes are generally arranged in parallel, highly elongated and have an aspect ratio of 25:1 or greater.
15. Fan cooling unit according to claim 14, wherein the nodes have an aspect ratio of 150:1 or greater.
16. Fan cooling unit according to any of claims 14 or 15, wherein the polytetrafluoroethylene (PTFE) is a blend of a PTFE-homopolymer and a modified PTFE-polymer.
17. Fan cooling unit according to any of claims 14 to 16, wherein the mem-brane filtration layer has a mean flow pore size greater than 1.5 µm.
18. Fan cooling unit according to claim 17, wherein the mean flow pore size is about 3 µm.
19. Fan cooling unit according to any of claims 1 to 18, wherein the protec-tive covering (1) is mounted in the air inlet opening (11).
20. Fan cooling unit according to any of claims 1 to 19, wherein the fan (6) is fitted in the casing (8) on a casing wall (13) situated opposite the air inlet opening (11).
21. Fan cooling unit according to any of claims 1 to 20, wherein the casing (8) is an all weather casing for use at a location exposed to the effects of all weather conditions.
22. Fan cooling unit according to any of claims 1 to 21, wherein a louvred panel (5) is fitted on the outside in front of the protective covering (1).
23. Use of a fan cooling unit according to any of claims 1 to 22 for cooling electronic components (7).
24. Use according to claim 23 for an air-cooled telecommunications base sta-tion.
CA2614251A 2005-07-14 2006-07-13 Fan cooling unit for cooling electronic components Active CA2614251C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05015346.9 2005-07-14
EP05015346A EP1750493B1 (en) 2005-07-14 2005-07-14 Fan cooling unit for cooling electronic components
PCT/EP2006/006880 WO2007006580A1 (en) 2005-07-14 2006-07-13 Fan cooling unit for cooling electronic components

Publications (2)

Publication Number Publication Date
CA2614251A1 true CA2614251A1 (en) 2007-01-18
CA2614251C CA2614251C (en) 2012-11-27

Family

ID=35160091

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2614251A Active CA2614251C (en) 2005-07-14 2006-07-13 Fan cooling unit for cooling electronic components

Country Status (13)

Country Link
US (1) US20090139405A1 (en)
EP (1) EP1750493B1 (en)
JP (1) JP2009501438A (en)
KR (1) KR101293101B1 (en)
CN (1) CN101223838B (en)
AT (1) ATE502514T1 (en)
BR (1) BRPI0612661A2 (en)
CA (1) CA2614251C (en)
DE (1) DE602005026932D1 (en)
ES (1) ES2363229T3 (en)
PL (1) PL1750493T3 (en)
RU (1) RU2378808C2 (en)
WO (1) WO2007006580A1 (en)

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Also Published As

Publication number Publication date
US20090139405A1 (en) 2009-06-04
WO2007006580A1 (en) 2007-01-18
EP1750493A1 (en) 2007-02-07
KR20080033961A (en) 2008-04-17
RU2378808C2 (en) 2010-01-10
ES2363229T3 (en) 2011-07-27
JP2009501438A (en) 2009-01-15
CN101223838B (en) 2011-01-26
KR101293101B1 (en) 2013-08-12
ATE502514T1 (en) 2011-04-15
DE602005026932D1 (en) 2011-04-28
CN101223838A (en) 2008-07-16
CA2614251C (en) 2012-11-27
BRPI0612661A2 (en) 2012-10-02
RU2008105072A (en) 2009-08-20
EP1750493B1 (en) 2011-03-16
PL1750493T3 (en) 2011-10-31

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