GB2426286A - An enclosure for a fan - Google Patents

An enclosure for a fan Download PDF

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Publication number
GB2426286A
GB2426286A GB0509694A GB0509694A GB2426286A GB 2426286 A GB2426286 A GB 2426286A GB 0509694 A GB0509694 A GB 0509694A GB 0509694 A GB0509694 A GB 0509694A GB 2426286 A GB2426286 A GB 2426286A
Authority
GB
United Kingdom
Prior art keywords
enclosure
fan
housing
inner housing
enclosure according
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
GB0509694A
Other versions
GB0509694D0 (en
GB2426286B (en
Inventor
Colin Biggs
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.)
Nuaire Ltd
Original Assignee
Nuaire 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 Nuaire Ltd filed Critical Nuaire Ltd
Priority to GB0509694A priority Critical patent/GB2426286B/en
Publication of GB0509694D0 publication Critical patent/GB0509694D0/en
Publication of GB2426286A publication Critical patent/GB2426286A/en
Priority to GB1004516A priority patent/GB2468778A/en
Application granted granted Critical
Publication of GB2426286B publication Critical patent/GB2426286B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations

Abstract

An enclosure 20 for a fan 10 comprising: an inner housing 22 for enclosing the fan 10; and an outer housing 24 with acoustically absorbent material 26 disposed between the walls of the inner and outer housings 22, 24. The inner housing 22 may be connected to the outer housing 24 by a number of mounting members serving as anti-vibration mounts 28. This arrangement results in an improved acoustic performance of the fan.

Description

Fan enclosure The present invention relates to an enclosure for a fan in a
ventilation or air handling system.
Various acoustic arrangements have been used hitherto to reduce the emission or "breakout" of noise from the fan casing of a fan mounted in a ventilation or air handling system. Some of these arrangements comprise an enclosure consisting of a single skin of metal to which an acoustically absorbent layer is applied: other arrangements comprise an enclosure made up of a number of sealed panels which enclose acoustic barrier material.
We have now devised an enclosure which provides an improved acoustic performance.
In accordance with the present invention, there is provided an enclosure for a fan, the enclosure comprising an inner housing for enclosing the fan, and an outer housing, with acoustically absorbent material disposed between the walls of the inner and outer housings.
Preferably the inner housing andlor the outer housing is formed of metal and may be in the form of a metal box, typically of square or rectangular cross-section.
Preferably the inner housing is connected to the outer housing by a number of mounting members of elastomeric material, serving as anti- vibration mounts. The enclosure may then be devoid of any rigid mechanical interconnection between the two housings, so providing complete structural isolation between the two housings.
An embodiment of the present invention will now be described by way of example only and with reference to the accompanying drawings, the single figure of which is a schematic cross-section through an embodiment of fan enclosure in accordance with the present invention.
Referring to the drawings, there is shown the fan of a ventilating or air handling system, the fan casing 10 having an inlet (not shown) and a projecting outlet port 12. The fan is disposed within an enclosure 20, with the outlet port 12 of the fan extending through an aperture in a wall of the enclosure 20: the enclosure is also formed, in another wall, with an aperture for an inlet duct 14; flexible joints or seals 11 are formed around the outlet port 12 and the inlet duct 14, to close the gaps between these and the peripheries of the apertures in the enclosure walls.
The enclosure 20 comprises an inner housing 22 and an outer housing 24, with acoustically absorbent material 26 disposed between the walls of the two housings. In the example shown, the inner and outer housings 22, 24 comprise metal boxes of square or rectangular cross-section. Further, the inner housing 22 is supported by the outer housing by means of a number of anti-vibration mounting blocks 28 which interconnect the walls of the two housings at spaced-apart intervals: the enclosure is devoid of any rigid mechanical interconnection between the two housings, thus providing complete structural isolation. The fan itself is mounted to the inner housing.
It will be noted that the inner housing or box 22 forms an integral structure disposed within the outer housing, which also forms an integral structure. One wall of each housing is however formed with an opening (not shown) to allow the fan to be to be fitted into the enclosure, and a closure is provided for this opening, the closure comprising two walls or skins separated by acoustically absorbent material.
It will be appreciated that the enclosure which has been described is of simple construction yet provides an effective acoustic barrier against the transmission of noise from the fan.

Claims (8)

  1. Claims: 1. An enclosure for a fan, the enclosure comprising an inner
    housing for enclosing the fan, and an outer housing, with acoustically absorbent material disposed between the walls of the inner and outer housings.
  2. 2. An enclosure according to claim 1 wherein the inner housing is formed of metal.
  3. 3. An enclosure according to claim 2 wherein the inner housing and/or outer housing has a square or rectangular cross section. * S
    *S.SS*
    S
  4. 4. An enclosure according to any preceding claim wherein the inner housing is:...:.
    connected to the outer housing by a number of anti-vibration mounting blocks. S..
    I * las
  5. 5. An enclosure according to claim 4 wherein the anti-vibration mounting blocks are formed of elastomeric material. .5..'. I... I... * S S S. S
  6. 6. An enclosure according to claims 4 or 5 wherein the anti-vibration mounting blocks interconnect the walls of the inner and outer housings at spaced apart intervals.
  7. 7. An enclosure according to any preceding claim, further comprising a fan mounted to the inner housing.
  8. 8. An enclosure according to any preceding claim, further comprising, a first aperture in a wall of the enclosure for an outlet port of a fan, and a second aperture in another wall of the enclosure for an inlet duct, and flexible joints or seals formed around the outlet port and the inlet duct to close gaps between these and the peripheries of the first and second apertures in the enclosure walls.
GB0509694A 2005-05-12 2005-05-12 Fan enclosure Active GB2426286B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0509694A GB2426286B (en) 2005-05-12 2005-05-12 Fan enclosure
GB1004516A GB2468778A (en) 2005-05-12 2010-03-18 An enclosure for a fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0509694A GB2426286B (en) 2005-05-12 2005-05-12 Fan enclosure

Publications (3)

Publication Number Publication Date
GB0509694D0 GB0509694D0 (en) 2005-06-15
GB2426286A true GB2426286A (en) 2006-11-22
GB2426286B GB2426286B (en) 2010-11-10

Family

ID=34685495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0509694A Active GB2426286B (en) 2005-05-12 2005-05-12 Fan enclosure

Country Status (1)

Country Link
GB (1) GB2426286B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004287A1 (en) * 1982-05-28 1983-12-08 Peabody Fans Ventilation fan with noise-attenuating housing
US5567127A (en) * 1994-11-09 1996-10-22 Wentz; Kennith W. Low noise air blower
JP2000027798A (en) * 1998-07-10 2000-01-25 Mitsubishi Electric Corp Air blowing device
GB2362926A (en) * 2000-02-22 2001-12-05 Robert Alan Gladden Ventilation system
EP1453181A2 (en) * 2003-02-28 2004-09-01 Sanden Corporation Supporting structure for blower motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4345079A1 (en) * 1993-12-31 1995-07-06 Missel Gmbh & Co E Assembly block for attaching building and technical equipment and / or systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004287A1 (en) * 1982-05-28 1983-12-08 Peabody Fans Ventilation fan with noise-attenuating housing
US5567127A (en) * 1994-11-09 1996-10-22 Wentz; Kennith W. Low noise air blower
JP2000027798A (en) * 1998-07-10 2000-01-25 Mitsubishi Electric Corp Air blowing device
GB2362926A (en) * 2000-02-22 2001-12-05 Robert Alan Gladden Ventilation system
EP1453181A2 (en) * 2003-02-28 2004-09-01 Sanden Corporation Supporting structure for blower motor

Also Published As

Publication number Publication date
GB0509694D0 (en) 2005-06-15
GB2426286B (en) 2010-11-10

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20230817 AND 20230823