EP0501073B1 - Air damper apparatus - Google Patents

Air damper apparatus Download PDF

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Publication number
EP0501073B1
EP0501073B1 EP19910311768 EP91311768A EP0501073B1 EP 0501073 B1 EP0501073 B1 EP 0501073B1 EP 19910311768 EP19910311768 EP 19910311768 EP 91311768 A EP91311768 A EP 91311768A EP 0501073 B1 EP0501073 B1 EP 0501073B1
Authority
EP
European Patent Office
Prior art keywords
slots
guide
damper
damper according
guide members
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
EP19910311768
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0501073A2 (en
EP0501073A3 (en
Inventor
Dipti Datta
Muammer Yazici
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0501073A2 publication Critical patent/EP0501073A2/en
Publication of EP0501073A3 publication Critical patent/EP0501073A3/en
Application granted granted Critical
Publication of EP0501073B1 publication Critical patent/EP0501073B1/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
    • F24F13/1426—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
    • F24F13/1486—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 bearings, pivots or hinges
    • 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
    • F24F2013/1466—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 pneumatic 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
    • F24F13/1426—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

  • the present invention relates generally to fluid dampers, and particularly to air dampers used in building ventilation systems.
  • Air dampers have been disclosed having longitudinal blades provided with sealing gaskets with the blades arranged in a venetian blind arrangement. Such systems are prone to leakage due to alignment problems which can arise over time. Other damper systems employ linkage assemblies having relatively slow response times.
  • a damper for controlling fluid flow in a fluid duct comprises a frame member having an opening for fluid flow therethrough when the damper is open; a closure member movable between a closed position where the opening is blocked and a second position in which the opening is unblocked; a mechanism for controlling movement of said closure member, the mechanism including a pair of spaced guide members fixed to the frame member, each of which is provided with first and second guide slots (52,54), the first guide slots in the two guide members being in registration with one another along their lengths, the second guide slots also being in registration with one another along their lengths, and further including support means having first and second registration means in the form of guide pins having said closure member secured thereto, the first registration means being movably captive within the first guide slots and the second registration means being movable within the second guide slots; and means for moving said support means between first and second positions corresponding respectively to the closed and open positions of the closure member, said damper characterized in that both of said first and second guide slots are arcuate slots and the first
  • an air damper 10 is shown mounted within an air duct 12 bounded by walls 14 for controlling air flow therethrough.
  • Fitted in the duct is a rectangular panel 20 with a central circular opening 21.
  • the panel 20 is provided with edge flanges 18 for attachment of the panel to the walls 14 by welding or the use of bolts (not shown).
  • Mounted on or secured to the circular edge of panel 20 is a gasket 24.
  • a support frame 26 extends horizontally across the opening 21 and between the opposite vertical flanges 18 of panel 20 at a point lower than the vertical midpoint thereof.
  • the frame 26 can be connected to the panel 20 by means of bolts (not shown).
  • Damper 10 includes a circular closure member or damper plate 28 which is in the shape of a shallow bowl or dish and which has substantially central flat planar portion 30. Preferably it has a rolled circumferential edge 31 for increased strength and rigidity.
  • damper plate 28 In the closed position damper plate 28 is vertically disposed within duct 12 with the peripheral edge of plate 28 in contact with gasket 24 thereby forming an annular seal, as represented by the solid lines in Figure 2.
  • Damper 10 also includes a damper plate control mechanism shown generally at 32 for controlling the movement of damper plate 28. Damper 10 includes a pair of spaced mounting frame members 34 secured to support frame 26 on which control mechanism 32 is mounted for mounting damper plate 28 in air duct 12.
  • Control mechanism 32 is operated by an actuating means which can be a pneumatic cylinder 36 pivotally mounted on a pivot rod 38 extending between and secured to frame members 34.
  • the pivotal connection of cylinder 36 to pivot rod 38 is accomplished using a bushing 40 mounted within a bracket 42 which in turn is rigidly attached to the back end of cylinder 36.
  • Pneumatic cylinder 36 is provided with a rod 44 attached to the front end thereof which is held firmly in a colinear relation with cylinder 36 while being reciprocally movable within cylinder 36.
  • the cylinder 36 is mounted inside the air duct 12.
  • control mechanism 32 includes a pair of opposed and spaced outer vertical guide plates or guide members 46 and 48 each rigidly secured to one of mounting frame members 34 by bolts 50 at a position forward of cylinder 36.
  • Guide plates 46 and 48 are each provided with a pair of downwardly arcuate or curvilinear guide slots 52 and 54 which are preferably closed at each end.
  • the first slots 52 are located above second slots 54 in members 46 and 48.
  • first and second slots 52 and 54 are of different lengths with slot 52 being shorter than slot 54.
  • Slots 52 in guide plates 46 and 48 are in registration, being horizontally matched.
  • the second slots 54 in plates 46 and 48 are in registration.
  • Slots 52 have a back end 56 and a front end 58 while slots 54 have a back end 60 and a front end 62.
  • the slots 52 and 54 are of uniform width along substantially their entire length.
  • Slots 52 and 54 are each provided with horizontally parallel portions located adjacent the back end portions 56 and 60 respectively (substantially in the range between positions A-B in Figure 4) while slots 52 and 54 diverge relative to one another in the forward direction towards the closure member beyond these parallel portions.
  • Control mechanism 32 also includes a rectangular U-shaped mounting bracket 68 having side walls 70 and 72 and an end plate 74.
  • This bracket 68 constitutes means for supporting the closure member 28.
  • a pair of spaced and parallel guide pins 76 and 78 are mounted horizontally through walls 70 and 72 and project laterally through slots 52 and 54 respectively and being of the diameter as the slots so that they slide within the slots.
  • These guide pins constitute first and second follower means mounted in or on the bracket 68.
  • the guide plates 46 and 48 and the guide pins 76 and 78 together constitute one form of means for coupling the mounting bracket 68 to the support structure provided in the air duct.
  • a connector bar 80 extends between walls 70 and 72 and is rotatably mounted therein.
  • the end of cylinder rod 44 is rigidly attached to connector bar 80.
  • End plate 74 is fixedly connected to the planar portion 30 of damper plate 28 by a plurality of bolts 82.
  • end plate 74 and damper plate 28 may be coupled using other means such as welding or gluing, depending on the material of construction.
  • damper 10 The operation of damper 10 will now be described with reference to Figures 2-4.
  • the relative positions of pins or followers 76 and 78 in guide slots 52 and 54 respectively as cylinder 36 urges bracket 68 forwards and backwards is illustrated in Figure 4 wherein the corresponding positions of damper plate 28 are illustrated.
  • cylinder 36 and rod 44 In the closed position, represented by the solid lines in Figure 2, cylinder 36 and rod 44 are angled upwardly from the horizontal while plate 28 is sealingly engaged with gasket 24.
  • guide pins 76 and 78 are at the rearmost limit of travel in slots 52 and 54 and are spaced from the back end of the respective slots.
  • bracket 68 As cylinder 36 urges bracket 68 forward the end of bracket 68 closest to cylinder 36 begins dropping and plate 28 undergoes both translational displacement forward and rotational motion counterclockwise as shown.
  • the various positions of plate 28 are shown in Figure 4 marked A′, B′ ... to the fully open position marked G′, with these positions corresponding to the positions of the pins marked with the same letters.
  • piston shaft 44 As back end of bracket 68 drops relative to the front end thereof, piston shaft 44 is pulled down causing cylinder 36 to pivot downwards about pivot rod 38. Both pins 76 and 78 undergo forward motion in the respective slots until point E is reached.
  • damper 10 will retrace the opening procedure, with pins 76 and 78 moving in the forward direction from points G in the slots until pin 78 reaches point F whereupon it reverses direction in slot 54. Pin 76 continues moving forward until it reaches point F whereupon it reverses direction in slot 52. Both pins are then pulled backwards towards points A in the respective slots. Cylinder 36 pivots upwards about rod 38 until the pins reach the horizontally parallel portions of the respective slots. At this point plate 28 is translationally displaced backwards whereupon the peripheral edge of plate 28 is compressed against gasket 24 thereby sealing damper in the closed position.
  • the rate of divergence of slots 52 and 54 determines the length of the piston stroke required to move damper plate 28 from the open to the closed position. Specifically, the greater the divergence of the slots in the forward direction, the shorter the piston stroke required to move the closure member between the two extremes. Since the slots diverge, the pin located in the slot with the steepest slope will move more rapidly than the other pin thereby producing a more rapid opening and closing time than would be obtained for linear slots with the same piston speed.
  • guide slots 52 and 54 are arcuate downwards as disclosed above, they may be arcuate upwards as well. In this case damper plate 28 would be rotated clockwise downwards as viewed in Figure 2. In addition, the direction of divergence of guide slots 52 and 54 could be reversed and the piston stroke reversed where again the guide slots may be arcuate upwards or downwards as desired.
  • this first damper embodiment is very linear in its control, that is, for a certain percentage of piston rod 44 movement, there is a corresponding percentage of total air flow allowed through the circular input opening 21. For example, a movement by the rod 44 of one third of its total stroke from the fully retracted position can be made to produce an air flow of about one third the total available air flow.
  • a reversing relay can be introduced between the cylinder 36 and the mounting bracket 68.
  • the closure member 28 is then in the open position when the piston shaft 44 of the cylinder is fully retracted.
  • the closure member 28 then starts to close as the shaft 44 is extended.
  • an air damper is shown mounted within an air duct 112 in which is mounted a panel 114, only the edges of which are shown.
  • a panel 114 mounted on a circular edge of this panel.
  • the gasket 24 which, in the closed position of the damper, is engaged by damper plate 28, only a central portion of which is shown.
  • Extending across the duct is a supporting frame 126.
  • Extending in the longitudinal direction and supported by the frame 126 are two spaced frame members 34.
  • Mounted on these frame members 34 is a control mechanism for the damper that is essentially the same as that illustrated in Figures 1 and 2 of the drawings.
  • a pneumatic cylinder 136 which operates the control mechanism is positioned outside of the duct (see Figures 6 and 7).
  • the pneumatic cylinder is connected to a shaft 137, sometimes called a jack shaft, which extends through the wall of the duct and is rotatably mounted on the two frame members 34.
  • a torque arm 139 which extends transversely to the shaft and is located midway between the frame members 34.
  • a connecting link member 141 is pivotally joined to an outer end portion of the torque arm by bolt 143.
  • This link member is connected to connector bar 180 which corresponds to the bar 80 in the embodiment of Figure 1. This link member is free to pivot around the bar 180. It will be appreciated that because the torque arm 139 and the link member 141 extend at an angle to one another, a partial rotation of the shaft 137 will drive the guide pins 76 and 78 along their respective slots in the manner described above.
  • FIG 8 illustrates how the shaft is rotatably mounted in the wall 14 of the duct.
  • the shaft mounting includes an externally threaded sleeve member or casing 150 which can be made of stainless steel.
  • this casing is formed with an external shoulder at 151 which locates the casing in the opening in wall 14.
  • a removable hex nut 152 is threaded onto the threaded end of the sleeve member.
  • the sleeve member has an annular internal recess 154 at one end thereof in which are preferably arranged tandem seals 155 and 156 that extend around the shaft.
  • seals act to effectively seal any air gap between the shaft and the casing 150.
  • the two seals are arranged immediately adjacent one another.
  • These seals can be PolyPak (trade mark) type "B" seals sold by Parker of Salt Lake City, Utah, U.S.A. These preferred seals are made from nitroxile. Two lips formed at one end of the seal are forced against the surfaces to be sealed by means of an O-ring type synthetic rubber O-spring.
  • a sintered bronze brushing (not shown) can be arranged between the hex nut 152 and the shaft to reduce friction and reduce wear on these two parts.
  • Figure 9 illustrates how an externally mounted pneumatic cylinder can also be used to operate a damper control mechanism such as that taught in the aforementioned Canadian patent No. 1,143,992.
  • the shaft 137 is again connected to a pneumatic cylinder located outside the duct and mounted as described above. Again, the shaft 137 is used to pivot a torque arm 139 which is pivotally connected to connecting link member 141.
  • the linkage system used to control the movement of the damper plate 28 will be described only briefly herein as the linkage system per se is known.
  • a U-bracket 200 is affixed to the concave portion of the damper plate.
  • Cross bars 202, 204 and 206 are all pivotally mounted in the two parallel arms of the bracket 200.
  • the link member 141 is rigidly connected to the cross-bar 202.
  • a first pair of link elements 208 and 210 are pivotally connected to respective frame members 34.
  • a second pair of linking elements 212 and 214 are pivotally connected as well to the frame members 34. It will thus be seen that the two pairs of linking elements together with the cross bars 202, 204 and 206 form means for coupling the U-bracket 200 to the fixed support structure mounted in the duct whereby the damper plate 28 can be moved between open and close positions as the shaft 137 rotates between two limit positions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
EP19910311768 1991-02-28 1991-12-18 Air damper apparatus Expired - Lifetime EP0501073B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA 2037356 CA2037356A1 (en) 1991-02-28 1991-02-28 Air damper apparatus
CA2037356 1991-02-28

Publications (3)

Publication Number Publication Date
EP0501073A2 EP0501073A2 (en) 1992-09-02
EP0501073A3 EP0501073A3 (en) 1993-01-27
EP0501073B1 true EP0501073B1 (en) 1995-03-22

Family

ID=4147092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910311768 Expired - Lifetime EP0501073B1 (en) 1991-02-28 1991-12-18 Air damper apparatus

Country Status (4)

Country Link
EP (1) EP0501073B1 (ja)
JP (1) JPH04295538A (ja)
CA (1) CA2037356A1 (ja)
DE (1) DE69108378D1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3039352A1 (en) * 2013-08-28 2016-07-06 Specialist Ventilation Services Limited A damper with improved seal and lock mechanism
US11149980B2 (en) 2018-06-12 2021-10-19 Ademco Inc. Retrofit damper with pivoting connection between deployment and operational configurations
US11300319B2 (en) * 2018-06-12 2022-04-12 Ademco Inc. Retrofit damper assembly

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE295516T1 (de) * 2001-01-29 2005-05-15 Joseph A Mcgill Regulierbarer dämpfer für luftstromsysteme
WO2003054454A1 (en) * 2001-12-12 2003-07-03 R.A.D. Innovations Inc. System for controlling distribution of air to different zones in a forced air delivery system
EP2052191B1 (de) * 2006-08-18 2016-11-16 Belimo Holding AG Luftklappe zur durchflussregelung innerhalb einer rohrleitung
US10401045B2 (en) 2014-02-13 2019-09-03 Air Distribution Technologies Ip, Llc Zone balancing damper and method of operation
CN107270508A (zh) * 2017-07-14 2017-10-20 珠海格力电器股份有限公司 挡风板组件及具有其的空调器
US11306941B2 (en) 2018-06-12 2022-04-19 Ademco Inc. Retrofit damper optimized for universal installation
CN115704605A (zh) * 2021-08-03 2023-02-17 青岛海尔空调器有限总公司 用于导风板的连杆构件、运动组件
DE102022111834A1 (de) * 2022-05-11 2023-11-16 Berbel Ablufttechnik Gmbh Mauerkasten
CN118218889B (zh) * 2024-05-22 2024-07-16 四川佰业鑫建设工程有限公司 一种装配式建筑施工用焊接设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1199122A (fr) * 1958-12-15 1959-12-11 Vanne étanche à opercule oscillant
CA1266199A (en) * 1985-01-28 1990-02-27 Waldemar H. Greiner Damper construction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3039352A1 (en) * 2013-08-28 2016-07-06 Specialist Ventilation Services Limited A damper with improved seal and lock mechanism
US11149980B2 (en) 2018-06-12 2021-10-19 Ademco Inc. Retrofit damper with pivoting connection between deployment and operational configurations
US11300319B2 (en) * 2018-06-12 2022-04-12 Ademco Inc. Retrofit damper assembly
US12044430B2 (en) 2018-06-12 2024-07-23 Ademco Inc. Retrofit damper assembly

Also Published As

Publication number Publication date
EP0501073A2 (en) 1992-09-02
DE69108378D1 (de) 1995-04-27
JPH04295538A (ja) 1992-10-20
EP0501073A3 (en) 1993-01-27
CA2037356A1 (en) 1992-08-29

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