WO2004032567A1 - Apparatus and method for moisture controlin an enclosure for e.g . loudspeakers - Google Patents
Apparatus and method for moisture controlin an enclosure for e.g . loudspeakers Download PDFInfo
- Publication number
- WO2004032567A1 WO2004032567A1 PCT/GB2003/004276 GB0304276W WO2004032567A1 WO 2004032567 A1 WO2004032567 A1 WO 2004032567A1 GB 0304276 W GB0304276 W GB 0304276W WO 2004032567 A1 WO2004032567 A1 WO 2004032567A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- enclosure
- heat source
- gases
- moisture
- operative
- Prior art date
Links
Classifications
-
- 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
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- 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
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0212—Condensation eliminators
Definitions
- This invention relates to apparatus for and methods of controlling moisture in an enclosure, and is particularly, but not exclusively, concerned with controlling the moisture in the enclosure or cabinet of an electroacoustic apparatus such as a loudspeaker.
- WO-A-03/013183 there is described the use of adsorbent material, within a loudspeaker cabinet, which is at least partially hydrophobic, to repel moisture and increase the acoustic compliance of the acoustic enclosure.
- EP-A-0401495 shows in figure 1 an enclosure for holding controllers for electric power switches.
- the enclosure has two ventilation openings and an internal electrical heater.
- the ventilation openings are through horizontal slots of substantial cross-sectional area.
- GB-A-2289752 describes a clothes dryer having two electrical blowers which respectively draw ambient air into a drying chamber and expel moisture-laden air from the cabinet. The incoming air is heated in a heat exchanger through which expelled air also passes. Again, the air flow is through openings of substantial cross-sectional area.
- the invention also provides a method of controlling the moisture in an enclosure which constitutes a humidity sensitive region, which comprises heating the gases within the enclosure or in gaseous communication therewith by a heat source, and providing, when the heat source is operative, for the outward movement of gases from the enclosure through a bore narrow enough substantially to prevent diffusion of gases therethrough in the absence of a pressure differential between the interior of the enclosure and the ambient atmosphere .
- the narrow bore therefore substantially prevents unwanted diffusion of moist air into the enclosure from the ambient atmosphere when the pressures inside and outside the enclosure are substantially equalised, yet allows moist air to be expelled by the action of the heat source.
- the system functions essentially as a pump to remove moisture from the enclosure by using thermal expansion of air to produce a net flow of moisture out of the interior ' of the enclosure and taking advantage of the increased moisture content of warmer air.
- the tube preferably has a length of from about 50 to about 2000 mm, more preferably from about 100 to about 1000 mm, still more preferably from about 200 to about 800 mm and most preferably about 500 mm.
- the tube may be linear or may be coiled, curved or otherwise non-linear, as desired.
- the cross-sectional area of the tube, or at its narrowest point is preferably from about 0.8 to about 180 mm 2 , more preferably from about 3 to about 180 mm 2 , still more preferably from about 12 to about 50 mm 2 and, most preferably, about 30 mm 2 .
- the length and cross- sectional area can be chosen with regard to the volume of the enclosure. In general, the greater the volume, the greater the length and/or the cross-sectional area should be.
- the invention also provides a loudspeaker enclosure which constitutes a humidity sensitive region and whose moisture content is arranged to be reduced by providing within the enclosure and/or in gaseous communication therewith a heat source, the enclosure comprising passage means to enable the outward movement of gases therefrom when the heat source is operative; and, further a method of controlling the moisture in a loudspeaker enclosure which constitutes a humidity sensitive region, which comprises heating the gases within the enclosure or in gaseous communication therewith by a heat source, and providing for the outward movement of gases from the enclosure when the heat source is operative.
- the heat source is switched on and off cyclically, conveniently at intervals of hours.
- the heat source In the case of a loudspeaker enclosure, into which moisture from the ambient atmosphere enters slowly, it may be necessary to switch the heat source "on" only every 3 to 4 hours for example .
- the heat source can be of any suitable form.
- one or more electrical resistors may be used, with an associated switching circuit.
- the arrangement may include a dessicant for drying the outgoing air.
- the enclosure includes an adsorbent material which is or has been treated to make it at least partially hydrophobic.
- an enclosure 10 which constitutes a humidity sensitive region and which contains air and/or gas or gases.
- loudspeaker units and/or other electroacoustic devices 11 will be present in the enclosure.
- a tube 12 with a bore which is narrow enough to prevent the diffusion of gases therethrough in a steady-state condition is in communication with the enclosure 10.
- the tube 12 is shown as being external to the enclosure, it could alternatively be positioned physically within the enclosure, or partially within the enclosure. Part way along the length of the tube 12 is a zone 14 which holds a dessicant 16. Again, regardless of the location of the tube 12, the dessicant 16 could alternatively be located within the enclosure.
- the tube 12 acts as a moisture trap.
- the tube has a circular bore of about 6 mm, corresponding to a cross-sectional area of about 28 mm 2 and a length of about 500 mm.
- At least one heat source for example, a resistive circuit, is provided to heat the air/gas/water vapour in the enclosure 10 or in the passage/zone 14 which is in communication with the enclosure.
- the heat source could be provided in the enclosure, as indicated at 18A, or at the dessicant 16, as indicated at 18B.
- more than one heat source could be provided, for example one in the enclosure and one in the moisture trap.
- the moisture can be adequately controlled by a cyclic operation of the heat source, for example at intervals of a few hours, e.g. 3 to 4 hours. This is suitably controlled automatically, by the use of a switching circuit 19.
- the heat generated by the heat source or sources will cause an expansion of the gases within the enclosure and there will be a passage of gases outwardly from the enclosure via the tube 12, entraining water vapour.
- the cabinet may contain an absorbent material 20 which is or has been treated to make it at least partially hydrophobic.
- the material 20 may be contained in a tube 22 of a multi-filament textile material suspended from a support arm 24.
- a suitable material is that disclosed in WO-A- 03/013183, the entire contents of which are incorporated herein by reference.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Drying Of Gases (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03753728A EP1547431A1 (en) | 2002-10-02 | 2003-10-02 | Apparatus and method for moisture control in an enclosure for e.g. loudspeakers |
AU2003271890A AU2003271890A1 (en) | 2002-10-02 | 2003-10-02 | Apparatus and method for moisture controlin an enclosure for e.g . loudspeakers |
US10/530,120 US20060153410A1 (en) | 2002-10-02 | 2003-10-02 | Apparatus and method for moisture controlin an enclosure for e.g. loudspeakers |
JP2004540971A JP2006501737A (en) | 2002-10-02 | 2003-10-02 | Method and apparatus for moisture control in loudspeaker enclosures |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0222759.3A GB0222759D0 (en) | 2002-10-02 | 2002-10-02 | Moisture control apparatus and methods |
GB0222759.3 | 2002-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004032567A1 true WO2004032567A1 (en) | 2004-04-15 |
Family
ID=9945106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2003/004276 WO2004032567A1 (en) | 2002-10-02 | 2003-10-02 | Apparatus and method for moisture controlin an enclosure for e.g . loudspeakers |
Country Status (7)
Country | Link |
---|---|
US (1) | US20060153410A1 (en) |
EP (1) | EP1547431A1 (en) |
JP (1) | JP2006501737A (en) |
AU (1) | AU2003271890A1 (en) |
GB (1) | GB0222759D0 (en) |
TW (1) | TW200413871A (en) |
WO (1) | WO2004032567A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100135516A1 (en) * | 2007-06-12 | 2010-06-03 | Shuji Saiki | Loudspeaker system |
EP2849463A1 (en) * | 2013-09-16 | 2015-03-18 | Sonion Nederland B.V. | A transducer comprising moisture transporting element |
US20150189694A1 (en) * | 2012-07-09 | 2015-07-02 | Telefonaktiebolaget L M Ericsson (Publ) | Moisture reduction in an electric assembly |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1696694B1 (en) * | 2004-04-13 | 2011-07-27 | Panasonic Corporation | Speaker device |
JP5198959B2 (en) * | 2007-07-27 | 2013-05-15 | パナソニック株式会社 | Speaker device |
US8687836B2 (en) | 2012-08-31 | 2014-04-01 | Bose Corporation | Loudspeaker system |
US8794373B1 (en) * | 2013-03-15 | 2014-08-05 | Bose Corporation | Three-dimensional air-adsorbing structure |
FR3124633B1 (en) * | 2021-06-28 | 2024-02-02 | Devialet | Acoustic system including a disassembly system with electric heating resistance. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5349140A (en) * | 1992-08-07 | 1994-09-20 | Valenzin Lawrence R | Microphone windscreen |
WO1999066775A1 (en) * | 1998-06-16 | 1999-12-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for housing component |
US6290758B1 (en) * | 1998-09-17 | 2001-09-18 | Alcatel | Equipment housing with humidity pump |
US20010045421A1 (en) * | 2000-02-09 | 2001-11-29 | Sullivan Patrick K. | Moisture control system for electrical devices |
JP2001346284A (en) * | 2000-06-05 | 2001-12-14 | Hiroshi China | Loudspeaker |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5910868Y2 (en) * | 1980-04-08 | 1984-04-04 | 伊吹工業株式会社 | Cold-resistant reflex horn speaker |
US4594082A (en) * | 1984-11-19 | 1986-06-10 | Harris Corporation | Dehydrating air-filtering apparatus |
US5446249A (en) * | 1993-07-13 | 1995-08-29 | Digisonix, Inc. | Dry acoustic system preventing condensation |
-
2002
- 2002-10-02 GB GBGB0222759.3A patent/GB0222759D0/en not_active Ceased
-
2003
- 2003-10-02 WO PCT/GB2003/004276 patent/WO2004032567A1/en active Application Filing
- 2003-10-02 AU AU2003271890A patent/AU2003271890A1/en not_active Abandoned
- 2003-10-02 TW TW092127325A patent/TW200413871A/en unknown
- 2003-10-02 EP EP03753728A patent/EP1547431A1/en not_active Withdrawn
- 2003-10-02 US US10/530,120 patent/US20060153410A1/en not_active Abandoned
- 2003-10-02 JP JP2004540971A patent/JP2006501737A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5349140A (en) * | 1992-08-07 | 1994-09-20 | Valenzin Lawrence R | Microphone windscreen |
WO1999066775A1 (en) * | 1998-06-16 | 1999-12-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for housing component |
US6290758B1 (en) * | 1998-09-17 | 2001-09-18 | Alcatel | Equipment housing with humidity pump |
US20010045421A1 (en) * | 2000-02-09 | 2001-11-29 | Sullivan Patrick K. | Moisture control system for electrical devices |
JP2001346284A (en) * | 2000-06-05 | 2001-12-14 | Hiroshi China | Loudspeaker |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 04 4 August 2002 (2002-08-04) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100135516A1 (en) * | 2007-06-12 | 2010-06-03 | Shuji Saiki | Loudspeaker system |
US8565463B2 (en) | 2007-06-12 | 2013-10-22 | Panasonic Corporation | Loudspeaker system |
US20150189694A1 (en) * | 2012-07-09 | 2015-07-02 | Telefonaktiebolaget L M Ericsson (Publ) | Moisture reduction in an electric assembly |
EP2849463A1 (en) * | 2013-09-16 | 2015-03-18 | Sonion Nederland B.V. | A transducer comprising moisture transporting element |
US9516437B2 (en) | 2013-09-16 | 2016-12-06 | Sonion Nederland B.V. | Transducer comprising moisture transporting element |
Also Published As
Publication number | Publication date |
---|---|
TW200413871A (en) | 2004-08-01 |
GB0222759D0 (en) | 2002-11-06 |
US20060153410A1 (en) | 2006-07-13 |
JP2006501737A (en) | 2006-01-12 |
EP1547431A1 (en) | 2005-06-29 |
AU2003271890A1 (en) | 2004-04-23 |
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