GB2361867A - Ventilator grill - Google Patents

Ventilator grill Download PDF

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Publication number
GB2361867A
GB2361867A GB0010660A GB0010660A GB2361867A GB 2361867 A GB2361867 A GB 2361867A GB 0010660 A GB0010660 A GB 0010660A GB 0010660 A GB0010660 A GB 0010660A GB 2361867 A GB2361867 A GB 2361867A
Authority
GB
United Kingdom
Prior art keywords
grill
openings
plate
stationary
sliding
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
GB0010660A
Other versions
GB0010660D0 (en
GB2361867B (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 GB0010660A priority Critical patent/GB2361867B/en
Publication of GB0010660D0 publication Critical patent/GB0010660D0/en
Priority to AU2001248618A priority patent/AU2001248618A1/en
Priority to CN 01811050 priority patent/CN1436089A/en
Priority to EP01921650A priority patent/EP1278576A1/en
Priority to PCT/GB2001/001783 priority patent/WO2001083034A1/en
Publication of GB2361867A publication Critical patent/GB2361867A/en
Application granted granted Critical
Publication of GB2361867B publication Critical patent/GB2361867B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C2/00Fire prevention or containment
    • A62C2/06Physical fire-barriers
    • A62C2/24Operating or controlling mechanisms
    • A62C2/241Operating or controlling mechanisms having mechanical actuators and heat sensitive parts
    • A62C2/245Operating or controlling mechanisms having mechanical actuators and heat sensitive parts with thermostatic elements, e.g. bimetallic, resettable actuators
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C2/00Fire prevention or containment
    • A62C2/06Physical fire-barriers
    • A62C2/18Sliding dampers

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Flow Control Members (AREA)
  • Ventilation (AREA)

Abstract

A grill 1 has openings 2 through which air can flow and a sliding sealing plate 3 positioned adjacent the grill which has openings 4 which register with the openings of the grill when the ventilator is open and lands between the openings which register with the openings of the grill when the ventilator is closed. Means are provided for imparting sliding movement to the sealing plate automatically in response to elevated temperature. The means comprise a spring 12 connected between the stationary grill and the sliding plate, the spring operating to resist movement of the sealing plate to retain the grill in its open configuration below a specified temperature and whose length increases at elevated temperatures to move the sliding plate relative to the stationary plate to close off the openings formed in the stationary plate. Movement of the sliding plate is reversed when the temperature falls. Utility is in preventing flow of smoke or flames during a fire.

Description

2361867 VENTILATOR GRILLS This invention relates to ventilator grills and
more especially to such grills which operate automatically to prevent the flow of smoke and/or flames through the grill in the presence of a fire.
A smoke barrier is disclosed in our earlier Application GB 2272836A. This barrier comprises an apertured plate slidable relative to a complementary apertured grill to open and close the openings of the grill. The plate is held by an electromagnet or solenoid in its open position and falls under gravity to its closed position when the electromagnet or solenoid is rendered inactive in the event of fire or smoke. One disadvantage of this earlier barrier is the requirement to supply electricity to the electromagnet or solenoid.
The present invention sets out to provide a ventilator grill which operates automatically in the event of elevated temperatures to prevent the passage of flames and/or smoke and which is not electrically operated.
In one aspect the present invention provides a ventilator comprising a stationary grill having openings through which air can flow and a sliding sealing plate positioned adjacent the grill and having openings which register with the openings of the grill when the ventilator is in an open configuration and lands between the openings which register with the openings of the grill when the ventilator is in its closed configuration, and means for imparting sliding movement to the sealing plate automatically in response to a predetermined elevated temperature, the movement imparting means comprising a spring connected between the stationary grill and the sliding plate which operates to resist movement of the sealing plate to retain the grill in its open configuration below a specified temperature and whose length increases at elevated temperatures to move the sliding plate relative to the stationary plate initially partially to close off the openings formed in the stationary plate and ultimately to fully close off these openings, movement of the sliding plate being reversed as the ambient temperature returns to below the specified temperature.
2 Preferably, the spring is produced from a memory metal, the properties of the spring being such that its length increases progressively between, say, 3WC and, say, 75'C at which temperature the openings of the stationary grill are fully closed.
By a "memory metaV is meant one whose length varies directly in proportion with the temperature to which it is subjected, the variation being relatively significant between a predetermined start and finish temperature. Bi-metallic materials enjoy this characteristic.
The invention will now be described by way of example only with reference to the accompanying diagrammatic drawing in which the sole Figure is a side view in section of a ventilator in accordance with the invention.
As will be seen from the drawing, the ventilator grill comprises an outer stationary grill panel 1 formed with a plurality of elongate openings 2 through which air can normally pass, from one side of the ventilator grill to the other. Inclined louvres 5 are sited above each opening 2. Positioned behind the stationary panel 1 is a sliding plate 3 also formed with a plurality of openings 4 of position and size which complement those of the stationary panel 1. The respective openings are so positioned that those of the sliding plate 3 register with those of the panel 1 when the ventilator is in its open configuration and lands 6 between the openings of the plate register with the openings of the panel 1 when the ventilator is in its closed configuration. A block 7 including an array of throughpassages 8 is positioned behind the sliding plate 3 and remote from the stationary grill panel 1.
Secured to the rearwardly extending wall 9 of the grill is a collar 10 within which is positioned a spring 12 produced from a memory metal, e.g. a bi-metallic material. The end of the spring 12 remote from the wall 9 is mounted on an annular plate 14 secured to the upper end of a rod 11. The end of the rod 11 remote from the collar 10 seats on a flange plate 15 secured to the sliding plate 3. Thus, any elongation of the spring 12 imparts downward movement to the rod 11 and thence to the sliding plate 3 through the flange 15.
3 The spring 12 is selected so that its length increases at elevated temperatures from an initial length at which the grill is in its open configuration with the respective openings in register and a second position in which the openings of the stationary panel 1 are closed by the lands 6 of the sliding plate 3. In one example the spring is selected whereby its length progressively increases between 3WC and 75'C at which the ventilator grill is respectively in its open and closed positions. Of course, between these temperatures there is a progressive closing or opening of the openings.
In operation, the grill is conventionally mounted within a wall, panel or the like. Normally, the grill is in its open position in which the openings 2, 4 of the panel 1, and plate 3 are in register, the spring 12 operating to hold the sliding plate 3 in its raised position. In the event of fire, the consequent elevated temperature causes the length of the spring to increase thereby moving the plate j downwardly initially partially to close the openings 2 and finally fully to close off these openings. As the ambient temperature falls, so the spring moves the sliding plate 3 relative to the stationary panel 1 until the ventilator adopts its open configuration.
It will be appreciated that the foregoing is merely exemplary of ventilators in accordance with the invention and that various modifications can readily be made thereto without departing from the true scope of the invention disclosed in this application.
4

Claims (3)

1 A stationary grill having openings through which air can flow and a sliding sealing plate positioned adjacent the grill and having openings which register with the openings of the grill when the ventilator is in an open configuration and lands between the openings which register with the openings of the grill when the ventilator is in its closed configuration, and means for imparting sliding movement to the sealing plate automatically in response to a predetermined elevated temperature, the movement imparting means comprising a spring connected between the stationary grill and the sliding plate which operates to resist movement of the sealing plate to retain the grill in its open configuration below a specified temperature and whose length increases at elevated temperatures to move the sliding plate relative to the stationary plate initially partially to close off the openings formed in the stationary plate and ultimately to fully close off these openings, movement of the sliding plate being reversed as the ambient temperature returns to below the specified temperature.
2. A grill as claimed in claim 1 wherein the spring is produced from a memory metal, the properties. of the spring being such that its length increases progressively between from a first temperature to a second temperature at which the openings of the stationary grill are fully closed.
3. A grill substantially as herein described and as described with reference to the accompanying diagrammatic drawings.
GB0010660A 2000-05-04 2000-05-04 Ventilator grills Expired - Fee Related GB2361867B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB0010660A GB2361867B (en) 2000-05-04 2000-05-04 Ventilator grills
AU2001248618A AU2001248618A1 (en) 2000-05-04 2001-04-19 Sliding ventilator grill with bimetallic actuator
CN 01811050 CN1436089A (en) 2000-05-04 2001-04-19 Sliding ventilator grill with bimetallic actuator
EP01921650A EP1278576A1 (en) 2000-05-04 2001-04-19 Sliding ventilator grill with bimetallic actuator
PCT/GB2001/001783 WO2001083034A1 (en) 2000-05-04 2001-04-19 Sliding ventilator grill with bimetallic actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0010660A GB2361867B (en) 2000-05-04 2000-05-04 Ventilator grills

Publications (3)

Publication Number Publication Date
GB0010660D0 GB0010660D0 (en) 2000-06-28
GB2361867A true GB2361867A (en) 2001-11-07
GB2361867B GB2361867B (en) 2003-03-26

Family

ID=9890872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0010660A Expired - Fee Related GB2361867B (en) 2000-05-04 2000-05-04 Ventilator grills

Country Status (5)

Country Link
EP (1) EP1278576A1 (en)
CN (1) CN1436089A (en)
AU (1) AU2001248618A1 (en)
GB (1) GB2361867B (en)
WO (1) WO2001083034A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2577987A (en) * 2018-09-04 2020-04-15 Joseph Simmons John Fire break

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108433190B (en) * 2018-05-15 2021-08-24 马鞍山安慧智电子科技有限公司 Electron cigarette convenient to change tobacco tar
CN111231627B (en) * 2020-03-23 2021-11-02 宁波均胜群英汽车系统股份有限公司 Automobile air outlet with air disinfection function
CN112432246B (en) * 2020-11-20 2021-08-10 科圣鹏环境科技有限公司 Constant-temperature and constant-humidity air treatment equipment and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161918A (en) * 1984-04-27 1986-01-22 Dixon International Ltd Ventilator which is closable to inhibit spread of smoke and fire
GB2213719A (en) * 1988-01-13 1989-08-23 Actionair Equip Sliding plate fire and smoke damper
GB2272836A (en) * 1992-07-23 1994-06-01 Environmental Seals Ltd A smoke barrier
GB2312842A (en) * 1996-05-10 1997-11-12 Environmental Seals Ltd Smoke and fire barrier grilles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725972A (en) * 1971-09-07 1973-04-10 Cabe F Mc Fire link and method of actuating same
DE2335393B2 (en) * 1973-07-12 1977-11-03 Schako Metallwarenfabrik Ferdinand Schad Kg, 7201 Kolbingen FIRE PROTECTION ARRANGEMENT FOR VENTILATION SYSTEMS WITH ONE AIR SHAFT
US4290554A (en) * 1979-02-01 1981-09-22 Hensley Robert C Temperature actuated foundation ventilator
US4817912A (en) * 1987-09-24 1989-04-04 Mccabe Francis J Bi-metal operator for smoke, fire and air control damper
US5294049A (en) * 1993-02-22 1994-03-15 Temp-Vent Corporation Power temp vent duct system
US5957373A (en) * 1998-01-12 1999-09-28 Temp-Vent Corporation Automatic ventilator with manual override

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161918A (en) * 1984-04-27 1986-01-22 Dixon International Ltd Ventilator which is closable to inhibit spread of smoke and fire
GB2213719A (en) * 1988-01-13 1989-08-23 Actionair Equip Sliding plate fire and smoke damper
GB2272836A (en) * 1992-07-23 1994-06-01 Environmental Seals Ltd A smoke barrier
GB2312842A (en) * 1996-05-10 1997-11-12 Environmental Seals Ltd Smoke and fire barrier grilles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2577987A (en) * 2018-09-04 2020-04-15 Joseph Simmons John Fire break

Also Published As

Publication number Publication date
GB0010660D0 (en) 2000-06-28
AU2001248618A1 (en) 2001-11-12
CN1436089A (en) 2003-08-13
EP1278576A1 (en) 2003-01-29
GB2361867B (en) 2003-03-26
WO2001083034A1 (en) 2001-11-08

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Legal Events

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

Effective date: 20070504