GB2291474A - A fire proofed extractor fan housing - Google Patents

A fire proofed extractor fan housing Download PDF

Info

Publication number
GB2291474A
GB2291474A GB9414433A GB9414433A GB2291474A GB 2291474 A GB2291474 A GB 2291474A GB 9414433 A GB9414433 A GB 9414433A GB 9414433 A GB9414433 A GB 9414433A GB 2291474 A GB2291474 A GB 2291474A
Authority
GB
United Kingdom
Prior art keywords
housing
extractor fan
fire
grille
intumescent material
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
GB9414433A
Other versions
GB2291474B (en
GB9414433D0 (en
Inventor
Derek Alfred Ward
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.)
Environmental Seals Ltd
Original Assignee
Environmental Seals 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 Environmental Seals Ltd filed Critical Environmental Seals Ltd
Priority to GB9414433A priority Critical patent/GB2291474B/en
Publication of GB9414433D0 publication Critical patent/GB9414433D0/en
Priority to AU25341/95A priority patent/AU2534195A/en
Priority to PCT/GB1995/001193 priority patent/WO1996002762A1/en
Publication of GB2291474A publication Critical patent/GB2291474A/en
Application granted granted Critical
Publication of GB2291474B publication Critical patent/GB2291474B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • F04D25/14—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures and having shutters, e.g. automatically closed when not in use

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Special Wing (AREA)

Abstract

The housing comprises a pair of metallic mounting plates (1, 4) which are in use positioned one adjoining each face of a panel (3), e.g. glass in which an extractor fan (2) is mounted. An enclosure (5) is detachably secured to one of the mounting plates (4) and is dimensioned to receive and contain the motor of the extractor fan. The rear wall of the enclosure (5) is defined by a grille (6) coated with or including an intumescent material which expands to close off the opening of the grille (6) in the event of a fire. The boundaries of the openings of the mounting plates (1, 4) which adjoin the panel faces are coated with intumescent material. <IMAGE>

Description

FIRE PROOFED HOUSINGS FOR EXTRACTOR FANS This invention relates to fire proofed housings for extractor fans and more especially to fire proofed housings for use with extractor fans mounted in a glazed panel or the like.
Extractor fans are generally produced from metallic and/or plastics and are commonly used to enhance the flow of air between, for example, a room and a corridor of a building. Extractor fans are commonly provided with louvred grilles which can be closed to prevent the flow of pollutants such as smoke. In the event of fire, existing extractor fans present little protection against the spread of fire between adjoining rooms or spaces. Indeed, the presence of an extractor fan can often increase the speed at which a fire can spread between other wise closed spaces. This is particularly the case when an extractor fan is mounted in a glazed panel.
This problem achieves greater significance on occasions where one of the otherwise confined spaces is a corridor, for example, used as a fire escape between offices, rooms or the like.
The present invention sets out to provide a fire proofed housing for an extractor fan which provides an acceptable and effective fire barrier between adjoining spaces.
According to the present invention in one aspect there is provided a fire proofed housing for an extractor fan to be mounted in a glazed panel or other support, the housing comprising a pair of metallic mounting plates which in use are positioned one adjoining each face of the panel in which the extractor fan is mounted, an enclosure detachably secured to one of the mounting plates and dimensioned to receive and contain the motor of the extractor fan, the rear wall of the enclosure being defined by a grille located with or including an intumescent material which expands to close off the openings of the grille in the event of a fire, and the boundaries at least of the openings of the mounting plates which in use are to adjoin the panel faces are coated with intumescent material.
The invention will now be described by way of example only with reference to the accompanying diagrammatic drawing in which the sole Figure is an exploded view in perspective of a housing in accordance with the invention.
The housing illustrated in the drawing comprises an outer metallic mounting plate 1 formed with a suitably shaped opening commensurate with the dimensions of an extractor fan 2 to be mounted on a glass panel 3; an inner metallic mounting plate 4 including a similarly sized opening and a box-shaped enclosure 5 formed with or including a rear grille 6. Also illustrated in the drawing is a front plate 7 of the fan 2 which overlies the mounting plate 1.
The grille 6 of the enclosure comprises a sandwich of suitably apertured metal sheets and an internal layer of intumescent material formed with an identical pattern of apertures to that of the metal sheets. Alternatively, the intumescent material may comprise a coating applied to one or both surfaces of a single apertured metal sheet. The various illustrated components are secured together by conventional fixings. Thus, the front plate and fan casing may include complementary screw threads, the mounting plates 1, 4 being drawn tightly onto the opposed faces of the panel 3 by screwing the fan casing to the plate 7.
Alternatively, grub screws may be provided for this purpose. The fan and its housing may be produced from plastics, metal or a combination of plastics and metal.
The front plate 7 includes a conventional smoke shutter in the form of a louvred opening 8.
In use the housing is assembled to the panel 3 with the outer and inner mounting plates 1, 4 positioned in contact with the adjoining surfaces of the panel. The boundary of the opening of each plate 1, 4 carries intumescent material to provide an effective seal between the plates and the panel in the event of a fire.
In use air is drawn through the housing by the extractor fan via the openings of the grille 6 and the louvred opening 8 of the front plate 7 of the fan 2. In the event of a fire, the intumescent content of the grille 6 rapidly expands to prevent the passage of flame and smoke through the housing and the layers of intumescent material around the openings of the plates 1, 4 expand rapidly to provide a seal between these plates and the panel.
The housing disclosed has particular application in circumstances in which an extractor fan is designed to be mounted within a glazed panel and in circumstances where an extractor fan is positioned between a room and an adjacent fire exit.
It will be appreciated that the foregoing is merely exemplary of fire proofed housing in accordance with the invention and that various modifications can readily be made thereto without departing from the true scope of the invention.

Claims (5)

1. A fire proofed housing for a motor-driven extractor fan to be mounted in a glazed panel or other support, the housing comprising a pair of metallic mounting plates which in use are positioned one adjoining each face of the panel in which the extractor fan is mounted, an enclosure detachably secured to one of the mounting plates and dimensioned to receive and contain the motor of the extractor fan, the rear wall of the enclosure being defined by a grille coated with or including an intumescent material which expands to close off the opening of the grille in the event of a fire, and at least the boundary of the opening of each mounting plate being coated with intumescent material.
2. A housing as claimed in Claim 1 wherein the grille comprises a sandwich of apertured metal sheets and an internal layer of intumescent material formed with substantially the same pattern of apertures to that of each metal sheet.
3. A housing as claimed in Claim 1 or Claim 2 produced from plastics or a combination of plastics and metal.
4. A housing as claimed in any one of Claims 1 to 3 wherein the front of the housing is closed by a smoke shutter.
5. A fire proofed housing substantially as herein described and as described with reference to the accompanying diagrammatic drawing.
GB9414433A 1994-07-16 1994-07-16 Fire proofed housings for extractor fans Expired - Fee Related GB2291474B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9414433A GB2291474B (en) 1994-07-16 1994-07-16 Fire proofed housings for extractor fans
AU25341/95A AU2534195A (en) 1994-07-16 1995-05-25 Fire proofed housings for extractor fans
PCT/GB1995/001193 WO1996002762A1 (en) 1994-07-16 1995-05-25 Fire proofed housings for extractor fans

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9414433A GB2291474B (en) 1994-07-16 1994-07-16 Fire proofed housings for extractor fans

Publications (3)

Publication Number Publication Date
GB9414433D0 GB9414433D0 (en) 1994-09-07
GB2291474A true GB2291474A (en) 1996-01-24
GB2291474B GB2291474B (en) 1997-12-17

Family

ID=10758484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9414433A Expired - Fee Related GB2291474B (en) 1994-07-16 1994-07-16 Fire proofed housings for extractor fans

Country Status (3)

Country Link
AU (1) AU2534195A (en)
GB (1) GB2291474B (en)
WO (1) WO1996002762A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001083033A1 (en) * 2000-05-04 2001-11-08 Environmental Seals Ltd. Ventilator grills
CN113464477A (en) * 2021-08-17 2021-10-01 浙江浙柯风机有限公司 Axial flow fan with hood

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108757528B (en) * 2018-05-04 2024-05-10 无锡康泰电子有限公司 Intelligent ventilating fan

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1532410A (en) * 1974-12-14 1978-11-15 Dufaylite Dev Ltd Intumescent fire barriers
GB2097046A (en) * 1981-04-16 1982-10-27 Mann Mcgowan Fabrications Ltd Fire-resistant grilles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT313068B (en) * 1970-06-20 1974-01-25 Trox Ges Mit Beschraenkter Geb Locking device for fire compartments in ventilation and air conditioning systems
GB1429203A (en) * 1973-10-22 1976-03-24 Temperature Ltd Air conditioning
US4328139A (en) * 1980-10-27 1982-05-04 E. I. Du Pont De Nemours And Company Flame retardant filled polypropylene compositions containing carbon black and a cured intumescent flame retardant (IFR)
GB2202041B (en) * 1987-01-22 1991-01-16 Gradwood Limited Ventilation units

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1532410A (en) * 1974-12-14 1978-11-15 Dufaylite Dev Ltd Intumescent fire barriers
GB2097046A (en) * 1981-04-16 1982-10-27 Mann Mcgowan Fabrications Ltd Fire-resistant grilles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001083033A1 (en) * 2000-05-04 2001-11-08 Environmental Seals Ltd. Ventilator grills
CN113464477A (en) * 2021-08-17 2021-10-01 浙江浙柯风机有限公司 Axial flow fan with hood
CN113464477B (en) * 2021-08-17 2023-09-08 浙江浙柯风机有限公司 Axial flow fan with hood

Also Published As

Publication number Publication date
GB2291474B (en) 1997-12-17
WO1996002762A1 (en) 1996-02-01
GB9414433D0 (en) 1994-09-07
AU2534195A (en) 1996-02-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070716