EP0472569B1 - A damper - Google Patents

A damper Download PDF

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Publication number
EP0472569B1
EP0472569B1 EP90907081A EP90907081A EP0472569B1 EP 0472569 B1 EP0472569 B1 EP 0472569B1 EP 90907081 A EP90907081 A EP 90907081A EP 90907081 A EP90907081 A EP 90907081A EP 0472569 B1 EP0472569 B1 EP 0472569B1
Authority
EP
European Patent Office
Prior art keywords
frame
lath
seal
cover piece
damper 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.)
Expired - Lifetime
Application number
EP90907081A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0472569A1 (en
Inventor
Taisto Tetri
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.)
Lapinleimu Oy
Original Assignee
Lapinleimu Oy
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 Lapinleimu Oy filed Critical Lapinleimu Oy
Publication of EP0472569A1 publication Critical patent/EP0472569A1/en
Application granted granted Critical
Publication of EP0472569B1 publication Critical patent/EP0472569B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae

Definitions

  • the invention relates to a damper according to the preamble of claim 1 and comprising at least one lath journalled in a frame.
  • the damper generally comprises a plurality of laths.
  • Dampers are used widely for regulating and/or closing the flow of air and various gases.
  • the ends of the laths are fixed and inflexible, and a sealing material is fastened either to the end of the lath or to the frame.
  • the soft sealing material generally felt or silicone rubber, rubs against the steel of the frame during the regulating movement.
  • the soft material has a high friction resistance when sliding along the steel, whereby the seal wears out rapidly and may be torn completely.
  • a severe risk is caused by the frosting of the seal in the wintertime, which may locally freeze up the seal to the frame.
  • the motor of the damper opens the damper, the seal may be locally torn completely.
  • the damaged seal causes undesired leakage. As a result, the energy and/or maintenance cost is increased considerably.
  • a damper according to the preamble of claim 1 is known from US-A-41 92 098.
  • This prior art document discloses a multible blade air damper having individual end edge seal elements for sealing of the end edges to the frame in the closed position.
  • the seal elements are mounted in end-to-end relation and define a continuous flat sealing surface in opposed, abutting alignment with the individual flat planar end edges of the plates.
  • Each seal element is a thin spring-like resilient metal plate and is compressed between the end of an aligned blade and the damper frame.
  • the ends of the laths are not fixed nor inflexible; instead, they are able to follow possible deformations in the frame.
  • the lath ends are "floating" and always in close contact with the frame.
  • Figure 1 is a schematic front view of a damper.
  • Figures 2 to 6 are sectional views through alternative embodiments along the line A-A shown in Figure 1.
  • the damper is generally designated with the reference numeral 1, the frame with the reference numeral 2, and a lash with the reference numeral 3.
  • the laths 3 are preferably insulated.
  • the laths 3 are turned by means of a lever mechanism, for instance.
  • the lever mechanism may be known per se and is therefore drawn merely in outline in Figure 1, the reference numeral 4.
  • the lath end is flexible, that is, floating in such a way that it follows closely and lightly the frame 2 irrespective of minor deformations of the frame.
  • Figures 2 to 6 show alternative constructions for a flexible lath end.
  • a platelike, flexible seal 6 is attached to the end of an insulated lath 3, and a "floating" cover piece 7 to be placed in contact with the frame 2 is positioned on the seal 6.
  • the cover piece 7 is preferably made of metal or of wear-resistant, lubric plastic, whereby the friction remains low and a long service life is obtained while the sealing effect remains unimpaired.
  • a flexible tubular seal 11 of rubber or plastic, for instance, is attached to a cover piece 12.
  • a spiral spring 15 is provided between a cover piece 16 and the end of an insulated lath 3, seals 14 being fitted between the branches 16a of the cover piece and the side surfaces of the lath 3.
  • the spiral spring 15 is not absolutely necessary; the seals 14 between the branches 16a of the cover piece and the side surfaces of the lath may alone provide the required flexibility.
  • Figure 5 shows an embodiment in which no separate floating cover piece is provided.
  • a tubular seal 13 is provided between the end of an insulated lath 3 and the frame 2.
  • a surface 13a to be placed in contact with the frame 2 is wear-resistant and lubric.
  • the seal 13, or at least its portion to be pressed against the frame 2 is made of a material of high mechanical strength to prevent damage to the seal at subzero temperatures.
  • the reference numeral 5 designates a journal on which the lath 3 is mounted to the frame 2.
  • Clearances shown in the drawing between the cover pieces 7, 8, 12 and 16 and the frame 2, respectively, are not real; in the drawing, they make it easier to distinguish the different parts from each other. The situation is the same in the case of the flexible tongue 9 and the tubular seals 11 and 13.
  • the frame 2 is preferably provided with an elevation 17 extending in parallel with the lath when the lath is in the closed position.
  • the flexible seal member is in each case attached to the end of the lath 3, whereby the frame 2, preferably only the elevation 17 of the frame, acts as a counter surface for the seal member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Air-Flow Control Members (AREA)
  • Surgical Instruments (AREA)
  • Glass Compositions (AREA)
  • Pens And Brushes (AREA)
  • Gasket Seals (AREA)
EP90907081A 1989-05-15 1990-05-09 A damper Expired - Lifetime EP0472569B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI892328 1989-05-15
FI892328A FI88961B (fi) 1989-05-15 1989-05-15 Avstaengningsspjaell
PCT/FI1990/000126 WO1990014564A1 (en) 1989-05-15 1990-05-09 A damper

Publications (2)

Publication Number Publication Date
EP0472569A1 EP0472569A1 (en) 1992-03-04
EP0472569B1 true EP0472569B1 (en) 1995-02-01

Family

ID=8528426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907081A Expired - Lifetime EP0472569B1 (en) 1989-05-15 1990-05-09 A damper

Country Status (6)

Country Link
EP (1) EP0472569B1 (fi)
AU (1) AU5561090A (fi)
DE (1) DE69016654D1 (fi)
FI (1) FI88961B (fi)
NO (1) NO175954C (fi)
WO (1) WO1990014564A1 (fi)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2394059A (en) * 1944-09-01 1946-02-05 Daniel I Hite Shutter structure
US3372514A (en) * 1965-10-06 1968-03-12 Robertson Co H H Side sealing members for operating louver assemblies
US3381601A (en) * 1966-08-29 1968-05-07 M & T Engineering Company Air damper assembly including sidewall sealing means
US3484990A (en) * 1968-06-17 1969-12-23 Arrow Louver & Damper Corp Damper assembly
AT292266B (de) * 1969-06-13 1971-08-25 Schwarz Walter Lüftungsgitter
US3885347A (en) * 1974-01-04 1975-05-27 Borg Warner Damper wind stop and blade seal design
DE2612241A1 (de) * 1976-03-23 1977-10-06 Schako Metallwarenfabrik Absperrklappe fuer die raumaustrittsoeffnungen von luft- und klimatechnischen anlagen
US4192098A (en) * 1978-06-12 1980-03-11 Johnson Controls Inc. Air damper apparatus particularly for heating, ventilating and air conditioning systems
AU4920079A (en) * 1978-08-03 1980-04-17 Mccord Corp. Bumper assembly
US4241539A (en) * 1979-01-18 1980-12-30 American Hardware & Paint Co., Inc. Seal for sides of pivoted blade structures
FI70636C (fi) * 1983-05-20 1991-01-01 Halton Oy Spjaelspaell.

Also Published As

Publication number Publication date
NO914460L (no) 1991-11-14
FI892328A (fi) 1990-11-16
NO175954C (no) 1995-01-04
NO914460D0 (no) 1991-11-14
NO175954B (no) 1994-09-26
DE69016654D1 (de) 1995-03-16
FI88961B (fi) 1993-04-15
WO1990014564A1 (en) 1990-11-29
FI892328A0 (fi) 1989-05-15
EP0472569A1 (en) 1992-03-04
AU5561090A (en) 1990-12-18

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