EP0188430A1 - A tight closing damper - Google Patents

A tight closing damper

Info

Publication number
EP0188430A1
EP0188430A1 EP19840904203 EP84904203A EP0188430A1 EP 0188430 A1 EP0188430 A1 EP 0188430A1 EP 19840904203 EP19840904203 EP 19840904203 EP 84904203 A EP84904203 A EP 84904203A EP 0188430 A1 EP0188430 A1 EP 0188430A1
Authority
EP
European Patent Office
Prior art keywords
damper
lids
arms
openings
affixed
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Withdrawn
Application number
EP19840904203
Other languages
German (de)
French (fr)
Inventor
Erik Stenfors
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.)
REGENAIR AB
Original Assignee
REGENAIR AB
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 REGENAIR AB filed Critical REGENAIR AB
Publication of EP0188430A1 publication Critical patent/EP0188430A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • 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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1406—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means
    • 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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
    • 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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • F24F2013/1473—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with cams or levers

Definitions

  • dampers of the so called Venetian shutter type In the ventilation field there are often used dampers of the so called Venetian shutter type to open or shut off an air passage, and also for control of the air flow therethrough.
  • dampers of the Venetian shutter type When the commercially available dampers of the Venetian shutter type are closed there still exists a certain leakage of air or gas, which leakage may amount to one or a few per cent of the nominal flow. In most cases such a leakage may be neglected, but in some applications it is a definite desire to have entirely tight dampers.
  • the present inventions aims at providing a damper which meets the just mentioned demand in a simple and appropriate way.
  • Pig. 1 is a side view, partly in section, of one embodiment of a damper according to the invention.
  • Fig. 2 shows the damper in Fig.l in an end view and into a slightly reduced scale.
  • Fig. 3 illustrates a modification of the damper in Fig.l
  • Fig. 4 and 5 illustrate, in cross-section, two different embodiments of sealing means.
  • the damper shaft 1 has been disposed at some distance a from the damper wall 2, which remedies the need for air-tight journals for the shaft 1 as well as for the arms 3 and 4, which carry the closing lids 5 and 6.
  • the disposition of the shaft 1 on one side of the damper wall has been made possible in that the arm 4 has been shaped in such a manner that it passes freely through the air passage 8 also when the lids 5 and 6 have been opened fully, close to 90°, by a turning of the shaft 1, to which the arms 3 and 4 are secured.
  • the lids 5 and 6 seal off under an even pressure against elastic gaskets 9 and 10 through pivoting and resilient mountings 11 and 12 on the arms 3 and 4. If the lids are short one mounting per lid is enough. If the lids are longer the tighty closing effect will be the same if 1 each lid is supported by two or more mountings, with the corresponding arms secured to the shafts 1, Fig.2.
  • Fig.2 illustrates, in end view, the design of a second Venetian shutter type embodiment of the damper. It will be noted that a reduction of the total flow area arises due to the cross-beams 14 with gaskets, but this is the price one has to pay in order to achieve the improved sealing.
  • the shafts 1 in Fig.2 are journalled in bearings 16 and are controlled by means of arms and links in the way which is common with Venetian shutter type dampers.
  • the resilient mountings 11 and 12 for the lids on the arms, Fig.l may be accomplished by means of spiral springs or other types of resilient components, such as rubber pads etc. If the distance a in Fig.3 is comparatively great in relation to the distance b_ between the air flow passages then the abutment of each lid against its gasket 9 may take place under a comparatively great angle v., which may cause a less satisfying sealing and a substantial wear on the gasket.
  • the lid By designing the arm 4 in such a manner that the lid in unloaded condition does not hit the uppermost and lowermost edges of the gasket 9 simultaneously but instead with some inclination v, the lid will then, as it is pulled against the gasket by the privotal and resilient mounting, hit the gasket under an angle v ⁇ from a normal to the gasket, i.e. close to perpendicularly to the gasket, and, thus, the problem of the too oblique engagement is eliminated.
  • the distance a of the shaft from the damper wall. Fig.3, may vary and may go down to 0 if the damper wall bulges slightly outwardly, which also eliminates the problem of the too oblique engagement with the gasket, but, of course, complicates the manufacture.
  • the construction is not limited to a design wherein the lids are coupled together in pairs but can also function with one lid only on each shaft.
  • the gasket may be designed so as illustrated in Fig.4, i.e. as a gasket member of a braided or woven strand of ceramic fibers, which are available for temperatures even up to 1000° C. Due to the pivotal mounting an even pressure all away round the edge of the lid is achieved also at these high temperatures.
  • the resilient component should be disposed outside the hot space at elevated temperatures, if the temperature is so high that metallic springs do not maintain their resiliency. If this would be the case then one would have to work with a privotal mounting only of the damper lid or lids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Lift Valve (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Abstract

Volet de fermeture étanche, ayant de préférence la forme d'une persienne avec des lamelles (5, 6). Les bras (3, 4) portant les lamelles (5, 6) sont conçus pour permettre l'ouverture du volet en faisant tourner un arbre (1) à environ 90o, arbre qui est tourillonné d'un côté de la paroi du volet et sur lequel les bras (3, 4) sont fixés de manière à permettre au gaz de s'écouler librement par les ouvertures.Watertight closing flap, preferably in the form of a shutter with strips (5, 6). The arms (3, 4) carrying the slats (5, 6) are designed to allow the opening of the shutter by rotating a shaft (1) at about 90o, which shaft is journalled on one side of the wall of the shutter and on which the arms (3, 4) are fixed so as to allow the gas to flow freely through the openings.

Description

A tight closing damper
In the ventilation field there are often used dampers of the so called Venetian shutter type to open or shut off an air passage, and also for control of the air flow therethrough. When the commercially available dampers of the Venetian shutter type are closed there still exists a certain leakage of air or gas, which leakage may amount to one or a few per cent of the nominal flow. In most cases such a leakage may be neglected, but in some applications it is a definite desire to have entirely tight dampers.
The present inventions aims at providing a damper which meets the just mentioned demand in a simple and appropriate way.
To the just mentioned end the damper according to the invention has been designed so, as is defined in principle in the characterizing clause of claim 1.
Pig. 1 is a side view, partly in section, of one embodiment of a damper according to the invention.
Fig. 2 shows the damper in Fig.l in an end view and into a slightly reduced scale.
Fig. 3 illustrates a modification of the damper in Fig.l;
Fig. 4 and 5 illustrate, in cross-section, two different embodiments of sealing means. According to Fig.l the damper shaft 1 has been disposed at some distance a from the damper wall 2, which remedies the need for air-tight journals for the shaft 1 as well as for the arms 3 and 4, which carry the closing lids 5 and 6. The disposition of the shaft 1 on one side of the damper wall has been made possible in that the arm 4 has been shaped in such a manner that it passes freely through the air passage 8 also when the lids 5 and 6 have been opened fully, close to 90°, by a turning of the shaft 1, to which the arms 3 and 4 are secured. The lids 5 and 6 seal off under an even pressure against elastic gaskets 9 and 10 through pivoting and resilient mountings 11 and 12 on the arms 3 and 4. If the lids are short one mounting per lid is enough. If the lids are longer the tighty closing effect will be the same if 1 each lid is supported by two or more mountings, with the corresponding arms secured to the shafts 1, Fig.2.
Fig.2 illustrates, in end view, the design of a second Venetian shutter type embodiment of the damper. It will be noted that a reduction of the total flow area arises due to the cross-beams 14 with gaskets, but this is the price one has to pay in order to achieve the improved sealing. The shafts 1 in Fig.2 are journalled in bearings 16 and are controlled by means of arms and links in the way which is common with Venetian shutter type dampers.
The resilient mountings 11 and 12 for the lids on the arms, Fig.l, may be accomplished by means of spiral springs or other types of resilient components, such as rubber pads etc. If the distance a in Fig.3 is comparatively great in relation to the distance b_ between the air flow passages then the abutment of each lid against its gasket 9 may take place under a comparatively great angle v., which may cause a less satisfying sealing and a substantial wear on the gasket. By designing the arm 4 in such a manner that the lid in unloaded condition does not hit the uppermost and lowermost edges of the gasket 9 simultaneously but instead with some inclination v,, the lid will then, as it is pulled against the gasket by the privotal and resilient mounting, hit the gasket under an angle v~ from a normal to the gasket, i.e. close to perpendicularly to the gasket, and, thus, the problem of the too oblique engagement is eliminated. The distance a of the shaft from the damper wall. Fig.3, may vary and may go down to 0 if the damper wall bulges slightly outwardly, which also eliminates the problem of the too oblique engagement with the gasket, but, of course, complicates the manufacture.
The construction is not limited to a design wherein the lids are coupled together in pairs but can also function with one lid only on each shaft.
If it is a question of hot gases, e.g. hot flue gases, the gasket may be designed so as illustrated in Fig.4, i.e. as a gasket member of a braided or woven strand of ceramic fibers, which are available for temperatures even up to 1000° C. Due to the pivotal mounting an even pressure all away round the edge of the lid is achieved also at these high temperatures. The resilient component should be disposed outside the hot space at elevated temperatures, if the temperature is so high that metallic springs do not maintain their resiliency. If this would be the case then one would have to work with a privotal mounting only of the damper lid or lids.

Claims

Claims
1. A tight closing damper comprising individual lids (5,6) or groups of such lids, preferably arranged as
Venetian shutter type lids, wherein a journal mechanism for the lids is affixed to a damper wall (2) with openings (7,8) for passage of the gas, around which openings there are disposed elastic gaskets (9,10) to form continous, gastight seals, characterized in that arms (3,4) which support the lids (5,6) are designed in such a manner that they permit opening of the damper by an at least 90 turning of a shaft (1) , which is journalled on one side of the damper wall and on which the arms (3,4) are affixed so that the gas can flow freely through the openings.
2. A damper as claimed in claim 1, characterized in that the lids (5,6) are pivotally and resiliently secured to the arms (3,4) in such a manner that they are permitted to abut their gaskets with an evenly distributed pressure.
3. A damper as claimed in claim 1 or 2, characterized in that the lids (5,6) are affixed to their arms with at least some inclination so that, on closing the damper, one edge of the lid abuts its gasket portion in advance of the opposite edge of the lid hits its gasket portion (Fig.3) .
EP19840904203 1983-11-03 1984-11-01 A tight closing damper Withdrawn EP0188430A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8306051 1983-11-03
SE8306051A SE444066B (en) 1983-11-03 1983-11-03 CLOSELY GAMES

Publications (1)

Publication Number Publication Date
EP0188430A1 true EP0188430A1 (en) 1986-07-30

Family

ID=20353171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840904203 Withdrawn EP0188430A1 (en) 1983-11-03 1984-11-01 A tight closing damper

Country Status (4)

Country Link
EP (1) EP0188430A1 (en)
JP (1) JPS61500376A (en)
SE (1) SE444066B (en)
WO (1) WO1985002008A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6146847B2 (en) * 2011-07-14 2017-06-14 フルタ電機株式会社 SHITTA
JP6195326B1 (en) * 2017-01-16 2017-09-13 株式会社野木製作所 Damper unit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366032A (en) * 1966-10-24 1968-01-30 Honeywell Inc Damper apparatus including inflatable sealing member
US3530783A (en) * 1969-01-13 1970-09-29 Honeywell Inc Damper apparatus and mounting clip to hold an inflatable sealing member
US3832940A (en) * 1973-06-28 1974-09-03 Pacific Air Prod Co Louver unit having a fire resistant seal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8502008A1 *

Also Published As

Publication number Publication date
WO1985002008A1 (en) 1985-05-09
SE8306051D0 (en) 1983-11-03
JPS61500376A (en) 1986-03-06
SE444066B (en) 1986-03-17
SE8306051L (en) 1985-05-04

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Effective date: 19860708

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Inventor name: STENFORS, ERIK