EP0160543A2 - Ventilator which is closable to inhibit spread of smoke and fire - Google Patents
Ventilator which is closable to inhibit spread of smoke and fire Download PDFInfo
- Publication number
- EP0160543A2 EP0160543A2 EP85302977A EP85302977A EP0160543A2 EP 0160543 A2 EP0160543 A2 EP 0160543A2 EP 85302977 A EP85302977 A EP 85302977A EP 85302977 A EP85302977 A EP 85302977A EP 0160543 A2 EP0160543 A2 EP 0160543A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- shutter
- shutters
- panel
- ventilator
- openings
- 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.)
- Withdrawn
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/24—Operating or controlling mechanisms
- A62C2/246—Operating or controlling mechanisms having non-mechanical actuators
- A62C2/247—Operating or controlling mechanisms having non-mechanical actuators electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/12—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of sliding members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
- F24F11/35—Responding to malfunctions or emergencies to fire, excessive heat or smoke by closing air passages
Definitions
- the present invention relates to a ventilator of the type comprising a panel having ventilation openings and a shutter for closing the openings to inhibit passage of smoke through the openings for example in the event of fire or smoke being detected.
- the present invention aims to provide an improved ventilator of the type referred to.
- a ventilator comprising: a panel having at least one ventilation opening; at least one shutter movably mounted on the panel, the shutter or shutters in a first position allowing flow of air through the ventilation opening or openings and in a second position closing the opening or openings; means for holding the shutter or shutters in said first position; means for holding the shutter or shutters in said second position; means for effecting movement of the shutter or shutters from said first position to said second position; and sealing means which when the shutter or shutters are in said second position cooperate with the shutter or shutters and the panel to provide a seal extending substantially completely around the ventilation opening or openings.
- the ventilator may comprise (a) only one shutter movable between the first position in which air is allowed to flow through the ventilation opening or openings and the second position in which the shutter causes the sealing means to cooperate with the shutter and the panel to provide the seal extending substantially completely around the ventilation opening or openings or (b) a plurality of shutters movable between respective positions in which air is allowed to flow through the ventilation opening or openings and respective positions in which the shutters together cause the sealing means to cooperate with the shutter and the panel to provide a seal extending substantially completely around the ventilation opening or openings.
- the means for holding the shutter or shutters in said first position may be electromagnetic means which when de-energized releases the shutter or shutters to allow it or them to move to said second position.
- electromagnetic means may be one of more electromagnets or solenoids which magnetically hold the shutter or shutters in said first position or may comprise an electromagnetically operated catch which when released allows the shutter or shutters to move to said second position.
- the shutter or shutters may be urged towards said second position by gravity or means such as one or more springs or hydraulic or pneumatic means may be provided to urge the shutter or shutters towards said second position.
- the means for effecting movement of the shutter or shutters from said first to said second position and for holding it or them in said second position may be one or more springs connected between the shutter or shutters and the panel.
- the means for holding the or each shutter in said first position, the means for holding the shutter in said second position and the means for effecting movement of the shutter may comprise a threaded shaft connected to the shutter and driven by a motor such that rotation of the shaft effects the movement of the shutter.
- the means for effecting movement of the shutter or shutters is connected to a smoke detector, the detection of smoke causing the shutter or shutters to move to said second position.
- the smoke detector may be mounted in a housing of the ventilator or otherwise be closely associated with the ventilator or may be positioned remote from the ventilator, e.g. on a ceiling of a room, in a wall or door of which the ventilator is mounted.
- the seal is provided by sliding sealing members extending in the direction of movement of the or each shutter and resilient sealing members extending transverse to said direction.
- Such sealing members may be held under compression to enhance their sealing ability and to compensate for any irregularities in the surfaces against which they seal.
- the first ventilator shown therein comprises a casing, a front panel 1 of which has an aperture therein. There is fastened to the panel 1, over the aperture, by means of screws (not shown) a louvre plate 2. A plurality of louvres 2' are pressed out of the plate 2 thereby to provide openings 3 for flow of air.
- a steel shutter 4 is slidably mounted on the rear of the panel 1.
- Two polytetrafluorethylene (ptfe) strips 5 are affixed to the rear of the panel 1.
- Two ptfe strips 6 are affixed to the front of the shutter 4 adjacent its side edges and, as described below, each strip 6-slides on a respective one of the strips 5.
- a plurality of holes 7 are provided in the shutter 4 adjacent its side edges. Each hole 7 accommodates a steel ball 8.
- edges of the strips 6, facing inwardly of the shutter 4, are flush with the corresponding edges of the strips 5 and the strips 5 extend substantially the whole length of the members 9.
- the strips 6 extend from the top edge of the shutter 4 to the bottom edge of the shutter.
- Two guide members 9 are mounted in the rear of the panel 1. Each provides a concave guide track 10 in which the balls 8 at the respective sides of the shutter 4 engage. The shutter 4 can thus slide up and down relative to the panel 1, the balls 8 rotating cn the concave guide track 10 and the ptfe strips 6 sliding on the ptfe strips 5.
- the guide members 9 may be spring loaded to compensate for irregularities in e.g. the surface of the track 10 or the engaging surfaces of the strips 5 and 6.
- a resilient blade 11 engaging, at its free edge, the panel 1.
- the ends of the blades 11 are in contact with or closely adjacent the respective strips 5 and 6.
- an elongate resilient sealing member 12 is affixed on the front of the shutter 4, adjacent its bottom edge.
- Each end of the member 12 is in contact with or closely adjacent the respective strip 6.
- another- elongate sealing member 13 is affixed on the panel 1 below the louvres 2', each end of which is in contact with or closely adjacent the respective strip 5.
- Two tension coil springs 14 (not shown in Figure 3) are connected between the panel 1 and the shutter 4 and urge the shutter downwardly (as viewed in Figure 1).
- Two electromagnets 15 are mounted on the panel 1 and connected to a smoke sensor.
- the electromagnets 15 are de-energized.
- the shutter 4 is then pulled by the springs 14 to its second position in which the resilient members 12 and 13 sealingly engage each other, the member 13 acting as a stop to limit downward movement of the shutter.
- a seal is also provided by each pair of engaging ptfe strips 5 and 6 and by the blade 11_ engaging with the panel 1.
- the ventilator of Figures 1 to 3 may be modified as described below with reference to Figure 3A.
- each guide member 9 has a channel-section portion 9'.
- Springs 20 act between the base of the channel section portion 9' and a steel carrier strip 21.
- a ptfe strip 22 To the strip 21 is affixed a ptfe strip 22.
- a ptfe strip 23 is affixed to the rear of the shutter 4, adjacent each of its side edges.
- Each strip 23 extends from the top edge of the shutter to its bottom edge.
- Each ptfe strip 22 is urged by the springs 21 against the corresponding ptfe strip 23.
- a sealing strip similar to strip 13 may be provided on the panel 1 at a position for the blade 11 to engage therewith when the shutter 4 is in its second position.
- the blade 11 may be replaced by a pair of strips similar to strips 12 and 13 and affixed respectively to the rear of the shutter 4 adjacent the upper edge and to the rear of the panel at a position such that the two strips sealingly engage with each other when the shutter 4 is in its second position.
- the top edge of the shutter may be provided with a lip and a resilient sealing member fixed on the rear of the panel 1 such that when the shutter 4 is in its second position the lip sealingly engages with the resilient sealing member. Both the lip and the resilient sealing member should extend completely between the ptfe strips 5 and 6.
- Intumescent material may be provided on the louvres 2', e.g. on their rear surface, so that in the event of a fire, the intumescent material intumesces and closes the" openings 3 thereby preventing flow of air through the ventilator even if any of the sealing members 11,12 and 13 or the ptfe strips 5 and 6 lose their sealing capability under the heat of the fire.
- Intumescent material may also be provided on the front and/or rear surface of the shutter 4.
- the strips 5 and 6 may be made of low friction material other than ptfe.
- a brush e.g. a nylon brush, may be used instead of the resilient blade 11.
- the blade 11 may be replaced by a compression seal.
- the sealing members 12 and 13 may be replaced by a single compression seal or a pair of compression seals.
- Such compression seals may be tubular resilient compression seals.
- More than two springs 14 may be provided. Only one electromagnet 15 may suffice.
- the plate 2 is shown as a louvre plate it may instead be in the form of a grille or grating or perforated sheet.
- Externally visible means may be provided to indicate that the shutter 4 is in its second position so that it is readily apparent when the ventilator has been closed and needs to be reset (i.e. reopened by moving the shutter to its first position). Also externally operable means may be provided to enable the ventilator to be readily manually reset when necessary.
- Each of the casing, the plate 2 and the shutter 4 may, instead of being made of metal, be made as a flame-retardant polyester resin moulding.
- the ventilator shown therein is similar to that shown in Figures 1 to 3 except that it has two shutters 4' connected by the springs 14. When the shutters 4 are in their first position they are disposed respectively to the left and right of the louvres 2 When the electromagnets are de-energized the shutters 4 are pulled by the springs 14 to cover the louvres.
- the third ventilator shown in the drawings comprise a circular ventilator panel 1.
- a plurality of openings 3 are provided in the panel for flow of air, portions la of the panel being disposed between the openings 3.
- a steel shutter 4 is mounted on the rear of the panel 1 and is rotatable about the centre 5 of the panel.
- the shutter 4 comprises blades 4'.
- the shutter 4 When the shutter 4 is in a first position the blades 4' are in registry with the portions la of the panel 1 so that air can flow freely through the openings 3.
- An electromagnet similar to the electromagnets 15 referred to above is provided for retaining the shutter 4 in the first position (as indicated by broken lines in Figure 4).
- a tension spring (not shown) is provided for urging the shutter 4 to a second position (as indicated by full lines in Figure 4) in which the blades 4' are in registry with and close the openings 3 to block flow of air through the openings.
- the electromagnet is connected to a smoke sensor.
- the electromagnet holds the shutter 4 in the first position but if smoke is detected by the smoke detector the electromagnet is de-energized and the shutter is pulled by the tension spring to its second position.
- Sealing means may be provided around the entire periphery of each blade 4' and/or around the entire periphery of each opening 3 so that when the shutter is in its second position the openings 3 are sealed closed.
- Such sealing means may be constituted by sealing members similar to the sealing members described above with reference to the first ventilator.
- the seal may be provided at the radially outer edges of the blades 4' and the openings 3 in the same manner as the seal is provided along the side edges of the panel 1 in the first ventilator and the seal may be provided along the radially extending edges of the blades 4' and the openings 3 in the same manner as the seal is provided along the top and bottom edges of the panel 1 in the first ventilator.
- the ventilator shown in Figure 6 is similar to the previously described ventilators, in particular the ventilator of Figures 1 to 3A except as described below.
- the ventilator comprises, mounted within the casing 1, an electric motor 40, a compartment 41 for accommodating - a transformer or battery for powering the motor and a compartment 42 accommodating a smoke-detector unit and a siren.
- the motor 40 is provided with a geared drive shaft 43 which has a threaded portion engaging in an internally threaded bush 44 non-rotatably attached to the shutter 4. (Conveniently the shaft 43 is made of conventional studding).
- the smoke detector When smoke is detected by the smoke detector, the smoke detector causes the motor 40 to operate to rotate the shaft 43 thereby to cause the bush 43 to move along the shaft and the shutter 4 to move from its first to its second position. Also the siren is caused to sound by the smoke detector when the latter detects smoke.
- a trip switch (not shown) is provided to switch off the motor 40 when the shutter reaches its second position.
- the smoke detector may be connected to an alarm system external of the ventilator.
- the sealing around the shutter 4 in the ventilator of Figure 6 is provided by sliding ptfe strips, as shown in Figure 3 or 3A and by sponge Neoprene sealing members such as members 12 and 13 shown in Figure 2.
- the motor may comprise a threaded shaft which engages in a fixed non-rotatable internally threaded bush of the motor, the shaft being attached to the shutter in a manner that allows the shaft to rotate. Rotation of the shaft by the motor then causes the shaft to move along its longitudinal axis to cause the shutter to move between its first and second positions.
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
- Ventilation (AREA)
Abstract
Description
- The present invention relates to a ventilator of the type comprising a panel having ventilation openings and a shutter for closing the openings to inhibit passage of smoke through the openings for example in the event of fire or smoke being detected.
- Various ventilators of the type referred to above are known. However, it has proved difficult to provide such a ventilator where flow of air through the ventilation openings is normally not unduly impeded but such flow of air is reliably prevented when the openings are closed and which can operate reliably in different orientations.
- The present invention aims to provide an improved ventilator of the type referred to.
- In accordance with the present invention, there is provided a ventilator comprising: a panel having at least one ventilation opening; at least one shutter movably mounted on the panel, the shutter or shutters in a first position allowing flow of air through the ventilation opening or openings and in a second position closing the opening or openings; means for holding the shutter or shutters in said first position; means for holding the shutter or shutters in said second position; means for effecting movement of the shutter or shutters from said first position to said second position; and sealing means which when the shutter or shutters are in said second position cooperate with the shutter or shutters and the panel to provide a seal extending substantially completely around the ventilation opening or openings.
- It is to be understood that the ventilator may comprise (a) only one shutter movable between the first position in which air is allowed to flow through the ventilation opening or openings and the second position in which the shutter causes the sealing means to cooperate with the shutter and the panel to provide the seal extending substantially completely around the ventilation opening or openings or (b) a plurality of shutters movable between respective positions in which air is allowed to flow through the ventilation opening or openings and respective positions in which the shutters together cause the sealing means to cooperate with the shutter and the panel to provide a seal extending substantially completely around the ventilation opening or openings.
- The means for holding the shutter or shutters in said first position may be electromagnetic means which when de-energized releases the shutter or shutters to allow it or them to move to said second position. Such electromagnetic means may be one of more electromagnets or solenoids which magnetically hold the shutter or shutters in said first position or may comprise an electromagnetically operated catch which when released allows the shutter or shutters to move to said second position.
- The shutter or shutters may be urged towards said second position by gravity or means such as one or more springs or hydraulic or pneumatic means may be provided to urge the shutter or shutters towards said second position.
- In one preferred aspect of the invention the means for effecting movement of the shutter or shutters from said first to said second position and for holding it or them in said second position may be one or more springs connected between the shutter or shutters and the panel.
- Alternatively the means for holding the or each shutter in said first position, the means for holding the shutter in said second position and the means for effecting movement of the shutter may comprise a threaded shaft connected to the shutter and driven by a motor such that rotation of the shaft effects the movement of the shutter.
- Preferably the means for effecting movement of the shutter or shutters is connected to a smoke detector, the detection of smoke causing the shutter or shutters to move to said second position. The smoke detector may be mounted in a housing of the ventilator or otherwise be closely associated with the ventilator or may be positioned remote from the ventilator, e.g. on a ceiling of a room, in a wall or door of which the ventilator is mounted.
- Preferably the seal is provided by sliding sealing members extending in the direction of movement of the or each shutter and resilient sealing members extending transverse to said direction. Such sealing members may be held under compression to enhance their sealing ability and to compensate for any irregularities in the surfaces against which they seal.
- The invention is further described below by way of example with reference to the accompanying drawings, wherein;
- Figure 1 is a rear view of a first ventilator according to the invention;
- Figure 2 is a section along line II-II of Figure 1;
- Figure 3 is a section along line III-III of Figure 1;
- Figure 3A shows a modification of the arrangement shown in Figure 3;
- Figure 4 is a diagrammatic rear view of a second ventilator according to the invention;
- Figure 5 is a rear view of a third ventilator according to the invention; and
- Figure 6 is a rear view of a fourth ventilator according to the invention.
- In the drawings like reference numerals indicate like parts.
- Referring to the drawings, the first ventilator shown therein comprises a casing, a
front panel 1 of which has an aperture therein. There is fastened to thepanel 1, over the aperture, by means of screws (not shown) alouvre plate 2. A plurality of louvres 2' are pressed out of theplate 2 thereby to provide openings 3 for flow of air. - A
steel shutter 4 is slidably mounted on the rear of thepanel 1. Two polytetrafluorethylene (ptfe)strips 5 are affixed to the rear of thepanel 1. Two ptfe strips 6 are affixed to the front of theshutter 4 adjacent its side edges and, as described below, each strip 6-slides on a respective one of thestrips 5. Also a plurality ofholes 7 are provided in theshutter 4 adjacent its side edges. Eachhole 7 accommodates a steel ball 8. - The edges of the strips 6, facing inwardly of the
shutter 4, are flush with the corresponding edges of thestrips 5 and thestrips 5 extend substantially the whole length of the members 9. The strips 6 extend from the top edge of theshutter 4 to the bottom edge of the shutter. - Two guide members 9 are mounted in the rear of the
panel 1. Each provides aconcave guide track 10 in which the balls 8 at the respective sides of theshutter 4 engage. Theshutter 4 can thus slide up and down relative to thepanel 1, the balls 8 rotating cn theconcave guide track 10 and the ptfe strips 6 sliding on theptfe strips 5. The guide members 9 may be spring loaded to compensate for irregularities in e.g. the surface of thetrack 10 or the engaging surfaces of thestrips 5 and 6. - Along the top edge of the
shutter 4 is provided a resilient blade 11 engaging, at its free edge, thepanel 1. The ends of the blades 11 are in contact with or closely adjacent therespective strips 5 and 6. On the front of theshutter 4, adjacent its bottom edge, an elongate resilient sealingmember 12 is affixed. Each end of themember 12 is in contact with or closely adjacent the respective strip 6. On thepanel 1 below the louvres 2' is affixed another-elongate sealing member 13, each end of which is in contact with or closely adjacent therespective strip 5. - Two tension coil springs 14 (not shown in Figure 3) are connected between the
panel 1 and theshutter 4 and urge the shutter downwardly (as viewed in Figure 1). - Two
electromagnets 15 are mounted on thepanel 1 and connected to a smoke sensor. - Normally the
electromagnets 15 are energized and hold thesteel shutter 4 in its first position as shown in Figure 1. Ventilation air can thus pass freely through the openings 3 provided by the louvres. - If smoke is detected by the smoke detector, the
electromagnets 15 are de-energized. Theshutter 4 is then pulled by thesprings 14 to its second position in which theresilient members member 13 acting as a stop to limit downward movement of the shutter. A seal is also provided by each pair ofengaging ptfe strips 5 and 6 and by the blade 11_ engaging with thepanel 1. Thus effectively a continuous endless seal is provided around thelouvres 2 and the openings 3 preventing flow of air (and consequently also passage of smoke and fire) through the ventilator. - The ventilator of Figures 1 to 3 may be modified as described below with reference to Figure 3A.
- Referring to Fifgure 3A, each guide member 9 has a channel-section portion 9'. Springs 20 act between the base of the channel section portion 9' and a
steel carrier strip 21. To thestrip 21 is affixed aptfe strip 22. To the rear of theshutter 4, adjacent each of its side edges, is affixed aptfe strip 23. Eachstrip 23 extends from the top edge of the shutter to its bottom edge. Eachptfe strip 22 is urged by thesprings 21 against thecorresponding ptfe strip 23. When theshutter 4 moves between its first and second positions and thestrips 23 slide on thestrips 22. - Referring to Figures 1 to 3A a sealing strip similar to
strip 13 may be provided on thepanel 1 at a position for the blade 11 to engage therewith when theshutter 4 is in its second position. Alternatively the blade 11 may be replaced by a pair of strips similar tostrips shutter 4 adjacent the upper edge and to the rear of the panel at a position such that the two strips sealingly engage with each other when theshutter 4 is in its second position. - As a further alternative, the top edge of the shutter may be provided with a lip and a resilient sealing member fixed on the rear of the
panel 1 such that when theshutter 4 is in its second position the lip sealingly engages with the resilient sealing member. Both the lip and the resilient sealing member should extend completely between theptfe strips 5 and 6. - Intumescent material may be provided on the louvres 2', e.g. on their rear surface, so that in the event of a fire, the intumescent material intumesces and closes the" openings 3 thereby preventing flow of air through the ventilator even if any of the sealing
members ptfe strips 5 and 6 lose their sealing capability under the heat of the fire. Intumescent material may also be provided on the front and/or rear surface of theshutter 4. - The
strips 5 and 6 may be made of low friction material other than ptfe. - A brush, e.g. a nylon brush, may be used instead of the resilient blade 11.
- The blade 11 may be replaced by a compression seal. Similarly the sealing
members - More than two
springs 14 may be provided. Only oneelectromagnet 15 may suffice. - Although the
plate 2 is shown as a louvre plate it may instead be in the form of a grille or grating or perforated sheet. - Externally visible means may be provided to indicate that the
shutter 4 is in its second position so that it is readily apparent when the ventilator has been closed and needs to be reset (i.e. reopened by moving the shutter to its first position). Also externally operable means may be provided to enable the ventilator to be readily manually reset when necessary. - Each of the casing, the
plate 2 and theshutter 4 may, instead of being made of metal, be made as a flame-retardant polyester resin moulding. - Referring to Figure 4, the ventilator shown therein is similar to that shown in Figures 1 to 3 except that it has two shutters 4' connected by the
springs 14. When theshutters 4 are in their first position they are disposed respectively to the left and right of thelouvres 2 When the electromagnets are de-energized theshutters 4 are pulled by thesprings 14 to cover the louvres. - It will be understood that the electromagnets, guide members and sealing members are omitted from Figure 4 for the sake of clarity.
- The third ventilator shown in the drawings comprise a
circular ventilator panel 1. A plurality of openings 3 are provided in the panel for flow of air, portions la of the panel being disposed between the openings 3. - A
steel shutter 4 is mounted on the rear of thepanel 1 and is rotatable about thecentre 5 of the panel. - The
shutter 4 comprises blades 4'. When theshutter 4 is in a first position the blades 4' are in registry with the portions la of thepanel 1 so that air can flow freely through the openings 3. An electromagnet (not shown) similar to theelectromagnets 15 referred to above is provided for retaining theshutter 4 in the first position (as indicated by broken lines in Figure 4). A tension spring (not shown) is provided for urging theshutter 4 to a second position (as indicated by full lines in Figure 4) in which the blades 4' are in registry with and close the openings 3 to block flow of air through the openings. - The electromagnet is connected to a smoke sensor.
- Normally the electromagnet holds the
shutter 4 in the first position but if smoke is detected by the smoke detector the electromagnet is de-energized and the shutter is pulled by the tension spring to its second position. - Sealing means may be provided around the entire periphery of each blade 4' and/or around the entire periphery of each opening 3 so that when the shutter is in its second position the openings 3 are sealed closed. Such sealing means may be constituted by sealing members similar to the sealing members described above with reference to the first ventilator. Thus the seal may be provided at the radially outer edges of the blades 4' and the openings 3 in the same manner as the seal is provided along the side edges of the
panel 1 in the first ventilator and the seal may be provided along the radially extending edges of the blades 4' and the openings 3 in the same manner as the seal is provided along the top and bottom edges of thepanel 1 in the first ventilator. - The ventilator shown in Figure 6 is similar to the previously described ventilators, in particular the ventilator of Figures 1 to 3A except as described below.
- Referring to Figure 6, the ventilator comprises, mounted within the
casing 1, anelectric motor 40, acompartment 41 for accommodating - a transformer or battery for powering the motor and acompartment 42 accommodating a smoke-detector unit and a siren. - The
motor 40 is provided with a geareddrive shaft 43 which has a threaded portion engaging in an internally threaded bush 44 non-rotatably attached to theshutter 4. (Conveniently theshaft 43 is made of conventional studding). - When smoke is detected by the smoke detector, the smoke detector causes the
motor 40 to operate to rotate theshaft 43 thereby to cause thebush 43 to move along the shaft and theshutter 4 to move from its first to its second position. Also the siren is caused to sound by the smoke detector when the latter detects smoke. - A trip switch (not shown) is provided to switch off the
motor 40 when the shutter reaches its second position. - Provision may be made to enable the smoke detector to be tested to ascertain that when it is actuated the shutter is caused to move from its first to its second position.
- To return the
shutter 4 to its first position, provision is made to enable themotor 40 to rotate theshaft 43 in the opposite sense to that in which it rotates when the shutter is moved to its second position. To this end, operation of the trip switch may cause the motor to be put into reverse so that when the motor is operated again the shutter is caused to return to its first position. - Although the ventilator functions as an independent unit the smoke detector may be connected to an alarm system external of the ventilator.
- Preferably the sealing around the
shutter 4 in the ventilator of Figure 6 is provided by sliding ptfe strips, as shown in Figure 3 or 3A and by sponge Neoprene sealing members such asmembers - As an alternative to the rotating threaded shaft and bush attached to the shutter of Figure 6. the motor may comprise a threaded shaft which engages in a fixed non-rotatable internally threaded bush of the motor, the shaft being attached to the shutter in a manner that allows the shaft to rotate. Rotation of the shaft by the motor then causes the shaft to move along its longitudinal axis to cause the shutter to move between its first and second positions.
- It is to be understood that the various options discussed above with respect to the seal of the first ventilator apply equally to the second, third and fourth ventilators. Similarly the various options discussed above with respect to the louvre plate of the first ventilator apply equally to the second and fourth ventilators.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB848410927A GB8410927D0 (en) | 1984-04-27 | 1984-04-27 | Ventilator |
GB8410927 | 1984-04-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0160543A2 true EP0160543A2 (en) | 1985-11-06 |
EP0160543A3 EP0160543A3 (en) | 1986-02-05 |
Family
ID=10560241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85302977A Withdrawn EP0160543A3 (en) | 1984-04-27 | 1985-04-26 | Ventilator which is closable to inhibit spread of smoke and fire |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0160543A3 (en) |
AU (1) | AU4171885A (en) |
GB (2) | GB8410927D0 (en) |
ZA (1) | ZA853158B (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2213719A (en) * | 1988-01-13 | 1989-08-23 | Actionair Equip | Sliding plate fire and smoke damper |
FR2680469A1 (en) * | 1991-08-23 | 1993-02-26 | Halton Oy | FIRE CUTTER AND METHOD FOR BLOCKING A FIRECUTTING CLOSURE ELEMENT. |
EP0540873A2 (en) * | 1991-11-08 | 1993-05-12 | Whirlpool Europe B.V. | Refrigerator of forced air circulation type with an air duct provided with a shutter member |
WO2002061346A1 (en) * | 2001-01-29 | 2002-08-08 | Mcgill Joseph A | Adjustable damper for airflow systems |
EP1275811A1 (en) * | 2001-07-10 | 2003-01-15 | Effertz Tore GmbH | Fire door |
WO2003006775A1 (en) * | 2001-07-10 | 2003-01-23 | Effertz Tore Gmbh | Fire-proof door |
US6991536B2 (en) | 2000-12-01 | 2006-01-31 | Kent Tooling And Components Limited | Air flow controller and fire damper in an air flow duct |
EP1684026A1 (en) * | 2005-01-21 | 2006-07-26 | Martin Reuter | Automatic closing device for openings |
CN104422099A (en) * | 2013-08-30 | 2015-03-18 | 海尔集团公司 | Air conditioner |
RU2740049C1 (en) * | 2020-07-01 | 2020-12-31 | Николай Александрович Туленинов | Ventilation grid of building ventilation system (versions) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2194327A (en) * | 1986-05-13 | 1988-03-02 | Nuaire Ltd | System for opening louvre ventilators |
GB2272836B (en) * | 1992-07-23 | 1996-09-11 | Environmental Seals Ltd | Improvements in or relating to smoke barriers |
GB2269097B (en) * | 1992-07-23 | 1996-05-01 | Environmental Seals Ltd | Improvements in or relating to fire barriers |
DE29520276U1 (en) * | 1995-12-21 | 1996-02-15 | Schulte, Günter, 59757 Arnsberg | Maintenance-free device for smoke and fire-proof partitioning of a ventilation pipe |
GB2312842B (en) * | 1996-05-10 | 1999-10-27 | Environmental Seals Ltd | Improvements in or relating to smoke and fire barriers |
GB9804052D0 (en) * | 1998-02-27 | 1998-04-22 | Kovacs Laurence K | Ventilator grille |
US6342004B1 (en) * | 2000-03-01 | 2002-01-29 | Digital Lightwave, Inc. | Automatic fire shutter mechanism for rack mounted chassis systems |
GB2361867B (en) | 2000-05-04 | 2003-03-26 | Environmental Seals Ltd | Ventilator grills |
AT412570B (en) * | 2001-09-19 | 2005-04-25 | Gande Astrid | DEVICE FOR REGULATING VENTILATION IN TUNNELS |
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US2827140A (en) * | 1954-10-06 | 1958-03-18 | S H Pomeroy Company Inc | Automatic fire window structure |
FR1425687A (en) * | 1962-04-24 | 1966-01-24 | Westfaelisches Metallwerk | Aeration register |
US3537380A (en) * | 1968-01-22 | 1970-11-03 | Wehr Corp | Variable volume distributor adapted to provide uniform throw |
FR2131958A1 (en) * | 1971-03-31 | 1972-11-17 | Sobinco Fa | |
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-
1985
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- 1985-04-26 GB GB08510632A patent/GB2161918B/en not_active Expired
- 1985-04-26 AU AU41718/85A patent/AU4171885A/en not_active Abandoned
- 1985-04-29 ZA ZA853158A patent/ZA853158B/en unknown
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US2827140A (en) * | 1954-10-06 | 1958-03-18 | S H Pomeroy Company Inc | Automatic fire window structure |
FR1425687A (en) * | 1962-04-24 | 1966-01-24 | Westfaelisches Metallwerk | Aeration register |
US3537380A (en) * | 1968-01-22 | 1970-11-03 | Wehr Corp | Variable volume distributor adapted to provide uniform throw |
FR2131958A1 (en) * | 1971-03-31 | 1972-11-17 | Sobinco Fa | |
US3799046A (en) * | 1972-04-06 | 1974-03-26 | Mitco Corp | Diffuser valve |
FR2274004A1 (en) * | 1974-06-06 | 1976-01-02 | Canivet Herve | Ventilator shutter with three positions - controlled remotely in case of fire or for smoke clearing |
FR2338091A1 (en) * | 1976-01-13 | 1977-08-12 | Sirulik Wilhelm | Kitchen ventilation cowl with fire prevention device - has spring loaded shutter held open by fusible pin and closing discharge conduit |
FR2411948A1 (en) * | 1977-12-14 | 1979-07-13 | Dorma Baubeschlag | SLIDING DOOR |
DE2935566A1 (en) * | 1979-09-03 | 1981-03-19 | Kessler & Luch Gmbh, 6300 Lahn-Giessen | DEVICE FOR CONTROLLING THE AIR CONDITIONING FROM A CENTRAL SYSTEM |
DE3215076A1 (en) * | 1982-04-22 | 1983-10-27 | Werner 7317 Wendlingen Schloz | Flameproofing apparatus for pneumatic post systems |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2213719B (en) * | 1988-01-13 | 1991-12-18 | Actionair Equip | Sliding plate fire and smoke damper |
GB2213719A (en) * | 1988-01-13 | 1989-08-23 | Actionair Equip | Sliding plate fire and smoke damper |
FR2680469A1 (en) * | 1991-08-23 | 1993-02-26 | Halton Oy | FIRE CUTTER AND METHOD FOR BLOCKING A FIRECUTTING CLOSURE ELEMENT. |
EP0540873A2 (en) * | 1991-11-08 | 1993-05-12 | Whirlpool Europe B.V. | Refrigerator of forced air circulation type with an air duct provided with a shutter member |
EP0540873A3 (en) * | 1991-11-08 | 1993-11-24 | Whirlpool Europ | Actuator device for operating a shut-off member for an air duct in a refrigerator of forced air circulation type |
US6991536B2 (en) | 2000-12-01 | 2006-01-31 | Kent Tooling And Components Limited | Air flow controller and fire damper in an air flow duct |
WO2002061346A1 (en) * | 2001-01-29 | 2002-08-08 | Mcgill Joseph A | Adjustable damper for airflow systems |
EP1275811A1 (en) * | 2001-07-10 | 2003-01-15 | Effertz Tore GmbH | Fire door |
WO2003006775A1 (en) * | 2001-07-10 | 2003-01-23 | Effertz Tore Gmbh | Fire-proof door |
EP1684026A1 (en) * | 2005-01-21 | 2006-07-26 | Martin Reuter | Automatic closing device for openings |
CN104422099A (en) * | 2013-08-30 | 2015-03-18 | 海尔集团公司 | Air conditioner |
CN104422099B (en) * | 2013-08-30 | 2017-04-05 | 海尔集团公司 | Air-conditioning |
RU2740049C1 (en) * | 2020-07-01 | 2020-12-31 | Николай Александрович Туленинов | Ventilation grid of building ventilation system (versions) |
Also Published As
Publication number | Publication date |
---|---|
GB8410927D0 (en) | 1984-06-06 |
GB2161918A (en) | 1986-01-22 |
AU4171885A (en) | 1985-10-31 |
GB8510632D0 (en) | 1985-06-05 |
EP0160543A3 (en) | 1986-02-05 |
ZA853158B (en) | 1986-01-29 |
GB2161918B (en) | 1988-10-12 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Inventor name: MACKIE, PETER Inventor name: TANNER, ROBERT ALFRED |