WO2019143863A1 - Clapet à air - Google Patents

Clapet à air Download PDF

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Publication number
WO2019143863A1
WO2019143863A1 PCT/US2019/014085 US2019014085W WO2019143863A1 WO 2019143863 A1 WO2019143863 A1 WO 2019143863A1 US 2019014085 W US2019014085 W US 2019014085W WO 2019143863 A1 WO2019143863 A1 WO 2019143863A1
Authority
WO
WIPO (PCT)
Prior art keywords
air duct
assembly
damper
air
airflow
Prior art date
Application number
PCT/US2019/014085
Other languages
English (en)
Inventor
Jean H. SCHOLTEN
Aurimas ANIULIS
Damon Bryan SMITH
Original Assignee
Johnson Controls, Inc.
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 Johnson Controls, Inc. filed Critical Johnson Controls, Inc.
Priority to CN202310483974.9A priority Critical patent/CN116447739A/zh
Priority to EP19704123.9A priority patent/EP3740722A1/fr
Priority to CN201980018253.2A priority patent/CN112136008B/zh
Priority to CA3088804A priority patent/CA3088804A1/fr
Priority to MX2020007615A priority patent/MX2020007615A/es
Publication of WO2019143863A1 publication Critical patent/WO2019143863A1/fr

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
    • F24F13/1406—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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • 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
    • F24F13/105—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers composed of diaphragms or segments
    • 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
    • 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
    • F24F13/1486—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
    • F24F2013/1433—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 electric motors
    • 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
    • F24F2013/1493—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 an elastic membrane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/30—Velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/40—Pressure, e.g. wind pressure

Definitions

  • the present disclosure relates, in exemplary embodiments, to air duct dampers and air duct airflo sensors. More particularly, exemplary embodiments relate to air dampers with controllable resolution at lower flow rates.
  • Air dampers are mechanical valves used to permit, block, and control the flow of air in air ducts.
  • Conventional dampers typically comprise a circular blade having an axle passing through the diameter of the blade, the ends of the axle being rotatingly mounted in the air duct wall.
  • the diameter of the blade is marginally smaller than the diameter of the circular (or other cross-sectional shape) air duct so that, when the blade is in the closed position, all, or essentially all airflow is blocked, with no air passing between the edge of the blade and the air duct interior wall.
  • a motor or other control mechanism is associated with the axle and, when actuated, rotates the axle, which causes the blade to rotate between an open, closed, or partially open position so as to permit controllable flow of air through the duct.
  • a sensor or multiple sensors are disposed proximate to the damper for measuring airflow. The sensor is connected to a processor, which actuates the motor that controls the blade rotation, thus controlling the airflow required.
  • the air damper assembly for an air duct having an interior wall and an exterior wall.
  • the air damper assembly includes a damper plate having a periphery and multiple teeth spaced at least partially around and extending from the periphery. The multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery.
  • the air damper assembly further includes an axle assembly fixedly coupled to the damper plate and rotatably coupled to the air duct. Rotation of the axle assembly causes the damper plate to rotate within the air duct between a fully open position and a fully closed position to increase or decrease a flow of fluid through the air duct.
  • the damper plate includes a first airfoil member having multiple teeth made of a first material; and a second airfoil member having multiple teeth made of second material, the second material having a greater stiffness than the first material.
  • the damper plate further includes a third airfoil member having multiple teeth made of a third material, the third material having a greater stiffness than the second material.
  • each of the teeth includes a resilient portion proximate the periphery and a flexible portion. The resilient portion has a greater stiffness than the flexible portion.
  • the damper plate includes a gasket configured to contact the interior wall of the air duct when the damper plate is in the fully closed position.
  • a portion of the multiple teeth contact the interior wall of the air duct when the damper plate is in the fully closed position. In some embodiments, a portion of the multiple teeth contact the interior wall of the air duct when the damper plate is in a partially closed position.
  • a portion of the multiple teeth are fabricated from polytetrafluoroethylene (Teflon). In some embodiments, a portion of the multiple teeth are fabricated from a metal having a plastic coating.
  • the axle assembly includes a first shaft member and a second shaft member.
  • Each of the first shaft member and the second shaft member includes a slot configured to receive the damper plate.
  • the axle assembly includes a shaft member configured to be fastened to the damper plate using a bracket component and multiple rivets.
  • the air damper assembly includes a damper control assembly configured to drive rotation of the axle assembly.
  • the damper control assembly comprises a pressure sensor, a motor, and an actuator.
  • Another implementation of the present disclosure is a method for controlling a flow of fluid through an air duct.
  • the method includes receiving a target airflow setpoint, receiving an airflow measurement from a pressure sensor, and generating a command to rotate a damper plate to a position setpoint between a fully open position and a fully closed position based at least in part on the target airflow setpoint and the airflow measurement.
  • the damper plate has a periphery and multiple teeth spaced at least partially around and extending from the periphery.
  • the multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery.
  • the method further includes driving the damper plate to the position setpoint.
  • a portion of the multiple teeth contact the interior wall of the air duct when the damper plate is in the fully closed position. In some embodiments, a portion of the multiple teeth contact the interior wall of the air duct when the damper plate is in a partially closed position.
  • the damper plate includes a first airfoil member having multiple teeth made of a first material; and a second airfoil member having multiple teeth made of second material, the second material having a greater stiffness than the first material.
  • the damper plate further includes a third airfoil member having multiple teeth made of a third material, the third material having a greater stiffness than the second material.
  • each of the teeth includes a resilient portion proximate the periphery and a flexible portion.
  • the resilient portion has a greater stiffness than the flexible portion.
  • Yet another implementation of the present disclosure is a method of providing an air damper assembly for an air duct having an interior wall and an exterior wall.
  • the method includes providing an air damper assembly that includes a damper plate having a periphery and multiple teeth spaced at least partially around and extending from the periphery. The multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery.
  • the method further includes providing an axle assembly fixedly coupled to the damper plate and rotatably coupled to the air duct. Rotation of the axle assembly causes the damper plate to rotate within the air duct between a fully open position and a fully closed position to increase or decrease a flow of fluid through the air duct.
  • the airflow sensor assembly includes an air duct having an interior wall and an exterior wall, a high pressure detection device, and a low pressure detection device.
  • the low pressure detection device includes a hollow ring disposed within the interior wall of the air duct.
  • the hollow ring includes an inner periphery portion, an outer periphery portion, and a first set of apertures defined therein. The first set of apertures is spaced around the inner periphery portion of the hollow ring.
  • the airflow sensor assembly further includes a pressure sensor fluidly coupled to the high pressure detection device and the low pressure detection device.
  • the low pressure detection device includes a first connecting opening disposed within the outer periphery portion of the hollow ring and a first tube fluidly coupled to the first connecting opening.
  • the high pressure detection device includes a second set of apertures defined therein and spaced around the inner periphery of the air duct, a gasket having a recessed area defined therein and a second connecting opening, the gasket being fitted over the exterior wall and proximate the second plurality of apertures, and a second tube fluidly coupled to the second connecting opening.
  • the pressure sensor is fluidly coupled to the first tube and the second tube.
  • the airflow sensor assembly includes a gasket guard ring configured to fit over an exterior surface of the gasket.
  • the airflow sensor assembly includes a damper control assembly that is communicably coupled to the pressure sensor.
  • the damper control assembly includes an air damper assembly, a motor, and an actuator.
  • each of the first set of apertures is orthogonal to a direction of airflow through the air duct.
  • the hollow ring has an outer diameter ranging from 0.5 inches to 0.75 inches.
  • the airflow sensor assembly includes an air duct having an interior wall and an exterior wall, a high pressure detection device, and a low pressure detection device.
  • the low pressure detection device includes an airflow restrictor, a first set of apertures defined therein and spaced around a periphery of the air duct, a first gasket having a recessed area defined therein and a first connecting opening. The first gasket is fitted over the exterior wall and proximate the first plurality of apertures and the airflow restrictor.
  • the lower pressure detection device further includes a first tube fluidly coupled to the first connecting opening.
  • the airflow sensor assembly further includes a pressure sensor fluidly coupled to the high pressure detection device and the low pressure detection device.
  • the airflow restrictor includes a shroud component coupled with the interior wall of the air duct. In other embodiments, the airflow restrictor includes a channel disposed in the interior wall of the air duct.
  • the high pressure detection device includes a second set of apertures defined therein and spaced around the inner periphery of the air duct, a gasket having a recessed area defined therein and a second connecting opening, the gasket being fitted over the exterior wall and proximate the second plurality of apertures, and a second tube fluidly coupled to the second connecting opening.
  • the pressure sensor is fluidly coupled to the first tube and the second tube.
  • the airflow sensor assembly includes one or more gasket guard rings configured to fit over at least one of an exterior surface of the first gasket or an exterior surface of the second gasket.
  • the airflow sensor assembly includes a damper control assembly that is communicably coupled to the pressure sensor.
  • the damper control assembly includes an air damper assembly, a motor, and an actuator.
  • the method includes receiving a high air pressure measurement from a high pressure detection device, and receiving a low air pressure measurement from a low pressure detection device.
  • the low pressure detection device includes a hollow ring disposed within the interior wall of the air duct.
  • the hollow ring includes an inner periphery portion, an outer periphery portion, and a first set of apertures defined therein.
  • the first set of apertures is spaced around the inner periphery portion of the hollow ring.
  • the low pressure detection device further includes a first connecting opening disposed within the outer periphery portion of the hollow ring, and a first tube fluidly coupled to the first connecting opening.
  • the method further includes calculating an air velocity through the duct based on the high air pressure measurement and the low air pressure measurement.
  • the high pressure detection device includes a second set of apertures defined therein and spaced around the inner periphery of the air duct, a gasket having a recessed area defined therein and a second connecting opening, the gasket being fitted over the exterior wall and proximate the second plurality of apertures, and a second tube fluidly coupled to the second connecting opening.
  • each of the first set of apertures is orthogonal to a direction of airflow through the air duct.
  • FIG. 1 is an isometric view of an air duct assembly, according to some embodiments.
  • FIG. 2 is an exploded isometric view of an air damper assembly which can be used in the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 3 is a front elevation view of the air damper assembly of FIG. 2, according to some embodiments.
  • FIG. 4 is a side elevation view of the air damper assembly of FIG. 2, according to some embodiments.
  • FIG. 5 is a rear elevation view of the air damper assembly of FIG. 2, according to some embodiments.
  • FIG. 6 is a side cross-sectional view of a shaft arrangement which can be used in the air damper assembly of FIG. 2, according to some embodiments.
  • FIG. 7 is a side cross-sectional view of another shaft arrangement which can be used in the air damper assembly of FIG. 2, according to some embodiments.
  • FIG. 8 is a side cross-sectional view of the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 9 is a detail cross-sectional view that depicts the air damper assembly of FIG. 2 in a partially closed position, according to some embodiments.
  • FIG. 10 is a detail cross-sectional view that depicts the air damper assembly of FIG. 2 in a fully closed position, according to some embodiments.
  • FIG. 11 is front elevation view of another air damper assembly which can be used in the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 12 is side elevation view of the air damper assembly of FIG. 11, according to some embodiments.
  • FIG. 13 is a side elevation view of another air damper assembly that can be used in the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 14 is an exploded isometric view of another air damper assembly which can be used in the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 15 is a detail view of another air damper assembly which can be used in the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 16 is a side cross-sectional view of an air duct airflow sensor assembly, according to some embodiments.
  • FIG. 17 is a side cutaway view of the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 18 is a top elevation view of the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 19 is an exploded perspective view of an air duct, ring and gasket components that can be utilized in the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 20 is another top view of the air duct assembly of FIG. 1, according to some embodiments.
  • FIG. 21 is a side cross-sectional view of the air duct assembly taken along the line B-B of FIG. 20, according to some embodiments.
  • FIG. 22 is a detail view C-C of the nipple, gasket and tube, according to some embodiments.
  • FIG. 23 is a detail view D-D of the gasket, according to some embodiments.
  • FIG. 24 is a side cross-sectional view of another air duct airflow sensor assembly, according to some embodiments.
  • FIG. 25 is a side cross-sectional view of another air duct airflow sensor assembly, according to some embodiments.
  • FIG. 1 depicts an isometric view of a cylindrical air duct assembly 1.
  • the air duct assembly 1 includes a first end 2, a second end 3, and interior wall 4, an exterior wall 5, and a control assembly 100.
  • the air duct assembly 1 can be situated such that air flows from the first end 2 to the second end 3.
  • Air duct assembly 1 is further shown to include an air damper assembly 10 situated within the interior wall 4.
  • FIG. 2 depicts an exploded isometric view
  • FIG. 3 depicts a front elevation view
  • FIG. 4 depicts a side elevation view
  • FIG. 5 depicts a rear elevation view.
  • Damper assembly 10 is shown to include, among other components, a first damper plate 12, and a second damper plate 14.
  • a first airflow member comprises a first section 18 and a second section 20.
  • the first and second sections 18, 20 are made of a generally rigid material, such as, but not limited to, metal, polymer, ceramic, wood, coated material, laminate, or the like. Each section comprises a straight portion 22 and a curved portion 24.
  • a plurality of fingers 30 is shown to extend outward from and at least partially around the curved peripheral portion of each section 18, 20.
  • the fingers 30 may be integrally formed with the sections 18, 20.
  • the fingers 30 may be separate and mounted or attached to at least a portion of each section 18, 20.
  • the fingers 30 are formed of a relatively resilient material.
  • the material may be metal, resilient plastic, or other generally resilient material.
  • fingers 30 are made of metal or other resilient material which is covered or coated with plastic or other material that will not appreciably scratch the interior wall of the air duct.
  • fingers 30 are made of a single material that is both resilient and that will not appreciably scratch the interior wall of the air duct.
  • the fingers 30 may be sized to have a length smaller proximate to the straight portion 22 and increase in length proximate to the midpoint of the curved portion 24. Stated differently, in such exemplary embodiments, the length of the fingers 30 varies from a maximum to a minimum over a span of about 90 degrees around the periphery. For example, referring specifically to FIG. 2, fingers 31-33 (with finger 31 being longer than fingers 32 or 33) are longer than fingers 34-36 (with finger 34 being longer than fingers 35 or 36).
  • the second section 20 of the airfoil member 16 is configured in mirror image to the first section 18 and has fingers 30 sized and configured similar to those associated with the first section 18.
  • the second airfoil member comprises, in exemplary embodiments, a first section 42 and a second section 44.
  • the first and second sections 42, 44 are made of a generally rigid material, such as, but not limited to, metal (e.g., Aluminum), polymer, ceramic, wood, coated material, laminate, or the like.
  • the first and second sections 42, 44 are fabricated from different material as first and second sections 18, 20.
  • the first and second sections 42, 44 can be fabricated from a material of lower stiffness than the material of first and second sections 18, 20.
  • the first and second sections 42, 44 are fabricated from the same material as first and second sections 18, 20.
  • Each section 42, 44 is shown to comprise a straight portion 46 and a curved portion 48.
  • a plurality of fingers 50 extends outward from and at least partially around the curved peripheral portion of each section 42, 44.
  • the fingers 50 may be integrally formed with sections 42, 44.
  • the fingers 50 may be separate and mounted or attached to at least a portion of each section 42, 44.
  • the fingers 50 are formed of a material more flexible than the material forming the fingers 30.
  • the material may be a flexible metal, plastic, fabric, laminate, or other material having a degree of flexion but which can return to the unflexed position.
  • the material may be polytetrafluorenthylene (“Teflon®).
  • the fingers 50 are sized to have a length smaller proximate to the straight portion 46 and increase in length proximate to the midpoint of the curved portion 48.
  • fingers 51-53 are longer than fingers 54-56 (with finger 54 being longer than fingers 55 or 56).
  • the second section 44 is configured in mirror image to the first section 42 and has fingers 50 sized and configured similar to those associated with the first section 42.
  • the fingers 50 may be sized to be slightly longer and/or slightly larger than the corresponding matching adjacent fingers 30 (i.e., when the first and second airfoil members are assembled and the fingers 30 are generally adjacent to fingers 50, finger 31 is adjacent to finger 51). This may be done so that the resilient fingers 30 are close to, but not touching (or barely touching) the interior wall 4 of the air duct 1 when the damper 10 is in the closed position, which will avoid or reduce the likelihood of the interior wall 4 being scratched by the resilient fingers 30.
  • the fingers 30 are slightly offset from the corresponding fingers 50.
  • the first and second damper plates 12, 14 may be connected to each other with the first and second airfoil members comprising sections 18, 20, 42, 44 sandwiched therebetween such that on one side of the damper the fingers 50 are showing on the top half and the fingers 30 are showing on the bottom half, with the reverse being the case on the other side of the damper.
  • the sections 18, 20, 42, 44 may be coupled with each other and the damper plates 12, 14 using rivets 58.
  • any other suitable fastening mechanism e.g., bolts, screws, adhesives
  • first and second damper plates 12, 14, may be connected to each other and the axle assembly 70 connected thereto using one or more bolts 82 and locknuts 84. It is to be understood that other fastening mechanisms known to those skilled in the air can be used.
  • an optional gasket 60 may be placed between the first and second damper plates 12, 14 and abutting the first and second sections 42, 44 of the second airfoil member (when assembled).
  • the optional gasket 60 can be used to seal off the airflow through the air duct assembly 1.
  • the optional gasket can be fabricated from rubber, silicone, neoprene, a plastic polymer, or any other suitable gasket material.
  • the axle assembly 70 may comprise a single piece, or, in exemplary embodiments, may comprise a first member 72 and a second member 74.
  • the first member 72 may be longer than the second member 74. As described in greater detail below with reference to FIG. 8, this may be because the first member 72 is configured to couple with a motor within the control assembly 100 of the air duct damper assembly 1.
  • each shaft member 72, 74 may comprise a split shaft sized to fit over the assembled first and second damper plates 12, 14 and first and second airfoil members, as shown in FIGS. 3-5.
  • each shaft member 72, 74 can include a slot to receive the assembled damper plates 12, 14 and airfoil members.
  • a rotation bushing 76 and a stationary bushing 78 may be fitted over each shaft member 72, 74 to ensure the free rotation of the air damper assembly 10 within the air duct assembly 1.
  • an O-ring 80 may also be fitted over each shaft member 72, 74.
  • FIGS. 6 and 7 cross-sectional views of embodiments of the joint between the axle assembly 70, the damper plates 12, 14, and the sections 18, 20, 42, 44 are depicted.
  • the sections 18, 20, 42, and 44 can be retained between the damper plates 12 and 14 using split shaft members 72, 74.
  • rivets 58 passing through the split shaft members 72, 72 are used to fasten the split shaft members 72, 74 and retain the sections 18, 20, 42, and 44, and the damper plates 12 and 14 in a stacked configuration.
  • another type of fastener can be utilized instead of rivets 58.
  • a solid shaft 86 may be used in the axle assembly 70 instead of split shaft members 72, 74.
  • the solid shaft 86 may be retained on the stacked configuration of sections 18, 20, 42, 44 and damper plates 12, 14 using a U-bracket 88 and rivets 58.
  • U-bracket 88 can have any suitable geometry required to retain the solid shaft 86 on the stacked configuration.
  • another type of fastener can be utilized instead of rivets 58.
  • the solid shaft 86 can be coupled flush against the damper plate 12. In other embodiments, a symmetrical configuration may be utilized, and the solid shaft 86 can be coupled flush against the damper plate 14.
  • FIG. 8 a side cross-sectional view of the damper assembly 10 mounted in the air duct assembly 1 is shown.
  • the axle assembly shaft member 74 may be positioned in an aperture 90 situated at the bottom of the air duct, and shaft member 72 may be positioned within an aperture 92 situated at the top of the air duct, proximate the control assembly 100.
  • the control assembly 100 may have a housing 102.
  • the housing 102 may house a power supply 104, a gear/motor 106, an actuator 108, a control board 110, a pressure sensor 112, and a low pressure pickup 114, and a high pressure pickup 116.
  • the pickups 114, 116 are in communication with pressure sensor mechanisms (not shown) inside the air duct 1, such mechanisms as are known to those skilled in the art.
  • an operator may provide a target airflow setpoint.
  • Pressure sensor 112 may provide information on the current actual airflow calculated from a high pressure pickup 114 and a low pressure pickup 116.
  • High pressure pickup 114 and low pressure pickup 116 can sense air pressure in the air duct flowing form the first end 2 to the second end 3 of the air duct 1. Movement of the damper 10 may occur to equalize the setpoint and actual airflow.
  • Airflow setpoint signals and measured airflow signals may be received by the control board 110, which generates a position setpoint signal sent to the power supply 104, which in turn actuates the motor 106.
  • the motor 106 is operationally associated with the axle assembly shaft member 72, causing it to rotate as needed between a fully opened position and a fully closed position.
  • FIGS. 9 and 10 detail cross-sectional views of the air damper assembly 10 are depicted in partially closed and fully closed positions, respectively.
  • FIG. 9 detail cross-sectional views of the air damper assembly 10 are depicted in partially closed and fully closed positions, respectively.
  • fingers 50 and gasket 60 come proximate to the interior wall 4. When doing so, the air flow is reduced, but not entirely.
  • the airspace 120 between the fingers 50 permits air to flow through until the air damper 10 rotates into a fully closed position, in which event the fingers 50 (all or at least a portion thereof), can flex so that most of the length, or at least a portion of the flat surface, of the finger 50 contacts the interior wall 4, as shown in FIG. 10.
  • a feature of the presently disclosed damper is that the airfoil members provide greater control and resolution of air pressure as the damper 10 and fingers 50, get closer to full closure. Because the present design does not need to accelerate air past vortex shedders (such as those used by a conventional damper product available from AccutrolTM), higher flow rates can be obtained.
  • Air damper assembly 300 can include a single plate, as opposed to the first and second damper plates of air damper assembly 10 as described above. Damper assembly 300 can have two rows of fingers 302, 303 atached to the periphery of the damper assembly 300 by fasteners 304. In another exemplary embodiment depicted in FIG. 13, an air damper assembly 400 can have a single row of a plurality of fingers 402 atached to the periphery of the damper assembly 400 by fasteners 404.
  • the damper can have more than two rows of fingers.
  • a damper 500 is shown having three rows of fingers.
  • the three rows of fingers can be achieved by incorporating a first airfoil (comprised of first section 18 and second section 20), a second airfoil (comprised of first section 42 and second section 44), and a third airfoil 502, comprised of first section 504 and second section 506.
  • the fingers of sections 504 and 506 of the third airfoil 502 have greater stiffness than the fingers of sections 18, 20, 42, 44.
  • one or more of sections 18, 20, 42, and 44 have greater or equivalent stiffness to sections 504 and 506.
  • Air damper assembly 600 can include teeth fabricated from one or more materials with varying stiffness.
  • each tooth 602 may have a relatively resilient or stiff portion 604 proximate to the base 606 and a relatively flexible portion 608 proximate to the distal end 610 of the tooth 602.
  • the air duct airflow sensor assembly 1000 includes a low pressure detection device and a high pressure detection device.
  • the low pressure detection device comprises a hollow ring 1020 which is mounted to or otherwise associated with the interior wall 4.
  • the outer diameter of the hollow ring 1020 can range from 0.5 inches to 0.75 inches. In an exemplary embodiment, the outer diameter of the hollow ring 1020 is 0.625 inches.
  • the ring 1020 has a plurality of apertures 1022 defined in the inner periphery 1023 of the ring (versus the outer periphery 1024 which is proximate to the interior wall 4).
  • the apertures 1022 are disposed in the inner periphery of the ring 1020 such that they are generally orthogonal to the orientation of airflow, so that air flows across the apertures 1022, rather than flowing into the apertures 1022.
  • a hollow connector nipple 1028 is connected to an aperture defined in the ring 1020 and an aperture defined in the duct 1.
  • a tube 1032 is connected to the nipple 1028. Air flowing into the apertures 1022 can flow through the ring 1020, into the nipple 1028, and through the tube 1032.
  • the tube 1032 is connected to a pressure sensor 1034 such that the air flowing through the tube 1032 is received and detected by the flow pressure sensor 1034.
  • the ring 1020 serves two purposes: as an air collection device, and as an airflow restriction obstacle, so as to create a measurable pressure differential.
  • the air duct 1 further includes multiple apertures 1040 defined therein, the apertures 1040 being arranged generally in a ring-shape around the interior wall 4.
  • a gasket 1042 is associated with the exterior wall 5 and is located generally over the apertures 1040.
  • the gasket 1042 has a recessed area 1043 such that when associated with the exterior wall 5 a chamber 1043 is formed. Detail views of the apertures 1040 and chamber 1043 are specifically depicted in FIGS. 22 and 23.
  • a hollow connector nipple 1044 is connected to the gasket 1042.
  • a gasket guarding ring 1045 may be used and is fitted over the gasket 1042.
  • a tube 1046 is connected to the nipple 1044.
  • the tube 1046 is connected to the pressure sensor 1034.
  • a separate pressure sensor (not shown) can be connected to the tube 1046.
  • the apertures 1040, gasket 1042, nipple 1044, tube 1046 and pressure sensor 1034 form a high pressure sensor detection device.
  • the pressure sensor 1034 is part of a control assembly 1006 that controls the opening and closing of a damper 1050.
  • a housing 1100 is mounted to or otherwise associated with the air duct.
  • a sensor 1034, processor 1102, actuator 1104 and power supply 1106 may be disposed within the housing 1100.
  • a damper 1050 is in operational communication with the actuator 1104.
  • air flowing through the duct 1 in the direction of arrow A first encounters the high pressure detection apertures 1040. A portion of the air enters the apertures 1040 and flows into the chamber 1043. The air then moves into the tube 1046 via the nipple 1044, and then into the pressure sensor 1034. The pressure detected is the“high” pressure in the duct 1, i.e., the pressure upstream from the airflow restrictor which is the ring 1020
  • Air flowing through the duct 1 next flows over the ring 1020 and can enter the apertures 1022 and travel through the nipple 1028 and the tube 1032, and into the pressure sensor 1034.
  • the pressure detected is the“low” pressure in the duct, i.e., the pressure at the point where airflow is restricted by the ring 1020.
  • the differential between the high pressure measurement and the low pressure measurement is an indication of the air velocity through the duct, specifically a scaled square root of the measured pressure (i.e., an application of Bernoulli’s principle).
  • the sensor 1034 can send a signal to the control assembly 1006 that in turn can cause the damper 1050 to rotate so as to open or close the air duct 1.
  • the pressure sensor 1034 is a“dead-end” pressure sensor (versus a flow-through sensor); i.e., after the initial pressure is established no further airflow goes through the sensor. This can reduce the chance of the apertures 1022 and 1040 becoming clogged.
  • a 0.5 inch diameter ring 1020 was used for an air duct having a 10 inch diameter. With such a construction measurements of 850 CFM (cubic feet per minute) down to 35 CFM were obtainable with a 0.1 in Wg duct static. In other embodiments, a 0.625 inch diameter ring 1020 may be utilized.
  • a benefit of the presently described sensor assembly is that because of the ring 1020 design having the apertures 1022 orthogonal to the airflow orientation, air to be diverted into the ring 1020 flows over the apertures 1022, rather than directly into the apertures 1022. This can reduce the likelihood of the apertures 1022 becoming clogged by dust, dirt and debris that accompanies the airstream.
  • VAV variable air volume
  • Another benefit of the presently described sensor assembly is that it presents minimal obstruction to the airflow and thus allows for greater CFM velocity at lower duct statics. Additionally, in the event any of the apertures 1022 become blocked, it is easy to carry out periodic maintenance by disconnecting the sensor 1034 and introducing a blast of compressed air into the tube 1032 or tube 1046. Any clogging debris will be blown out of the apertures 1022 or 1040, respectively.
  • Another benefit of the presently described sensor assembly as part of an overall sensor/controller/damper design is that it can operate off of a 0-10V control signal to provide the desired airflow. This allows a designer or operator to set a required CFM with a linear control signal from a control system.
  • FIG. 24 depicts an airflow sensor assembly including a shroud component 1060.
  • the shroud component 1060 can be ring-shaped, with an interior wall attachment portion 1062, an inclined portion 1064, and an aperture shielding portion 1066, although any suitable shroud configuration or geometry may be utilized.
  • the aperture shielding portion 1066 extends from the interior wall 4 a distance ranging from 0.5 inches to 0.75 inches.
  • the aperture shielding portion 1066 is situated proximate apertures 1022 disposed within the air duct 1.
  • a gasket 1048 is associated with the exterior wall 5 and is located generally over the apertures 1022.
  • one or more gasket guarding rings may be used and fitted over the gaskets 1042, 1048.
  • the gasket 1048 has a recessed area 1049 such that when associated with the exterior wall 5 a chamber 1049 is formed. Air flowing through the duct 1 flows over the interior wall attachment portion 1062, the inclined portion 1064, and the aperture shielding portion 1066 of the shroud component 1060 and can enter the apertures 1022. The air can then travel through the chamber 1049 into the nipple 1028. Similar to the pressure measurement process described above with reference to FIGS. 16-23, after passing through the nipple 1028, the air can travel through a tube and into a pressure sensor for the purpose of controlling an air damper assembly.
  • FIG. 25 an airflow sensor assembly including a channel feature 1070 is depicted. Similar to the shroud component 1060 described above with reference to FIG. 24, the channel feature 1070 may be utilized as an air restriction feature in place of the hollow ring 1020 described above with reference to FIGS. 16-23.
  • the channel feature 1070 can include multiple apertures 1022 distributed about a periphery of the channel feature 1070.
  • the depth of the channel feature 1070 can range from 0.5 inches to 0.75 inches.
  • the depth of the channel feature 1070 is 0.625 inches. In other words, if the air duct 1 is nominally 10 inches in diameter, the diameter may expand to 11.25 inches in the region of the channel feature 1070.
  • a gasket 1048 is associated with the exterior wall 5 and is located generally over the apertures 1022.
  • one or more gasket guarding rings may be used and fitted over the gaskets 1042, 1048.
  • the gasket 1048 has a recessed area 1049 such that when associated with the exterior wall 5 a chamber 1049 is formed. Air flowing through the duct 1 flows over the channel feature 1070 and can enter the apertures 1022. The air can then travel through the chamber 1049 into the nipple 1028. Similar to the pressure measurement process described above with reference to FIGS. 16-23, after passing through the nipple 1028, the air can travel through a tube and into a pressure sensor for the purpose of controlling an air damper assembly.
  • damper of the present disclosure can also be used with a duct constructed for conveyance of other fluids, such as, but not limited to, gases and liquids.
  • the present invention also relates to a damping system comprising a duct, a damper according to the damper embodiments disclosed hereinabove and mounted in the duct, and a control assembly adapted to rotate the damper from an open to a closed position.
  • the word“comprise” and variations of the word, such as“comprising” and“comprises,” means“including but not limited to,” and is not intended to exclude, for example, other additives, components, integers or steps.
  • “Exemplary” means“an example of’ and is not intended to convey an indication of a preferred or ideal embodiment.“Such as” is not used in a restrictive sense, but for explanatory purposes.

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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)

Abstract

L'invention concerne un ensemble de clapet à air pour un conduit d'air comprenant une paroi intérieure et une paroi extérieure. L'ensemble de clapet à air comprend une plaque de clapet ayant une périphérie et une pluralité de dents espacées au moins partiellement autour de la périphérie et s'étendant à partir de celle-ci. La pluralité de dents varient en longueur entre un maximum et un minimum sur un intervalle d'environ 90 degrés autour de la périphérie. L'ensemble de clapet à air comprend également un ensemble d'axe couplé de manière fixe à la plaque de clapet et couplé en rotation au conduit d'air. La rotation de l'ensemble d'axe entraîne la rotation de la plaque de clapet à l'intérieur du conduit d'air entre une position complètement ouverte et une position complètement fermée pour augmenter ou diminuer un écoulement de fluide à travers le conduit d'air.
PCT/US2019/014085 2018-01-17 2019-01-17 Clapet à air WO2019143863A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202310483974.9A CN116447739A (zh) 2018-01-17 2019-01-17 空气闸
EP19704123.9A EP3740722A1 (fr) 2018-01-17 2019-01-17 Clapet à air
CN201980018253.2A CN112136008B (zh) 2018-01-17 2019-01-17 空气闸
CA3088804A CA3088804A1 (fr) 2018-01-17 2019-01-17 Amortisseur de conduite d'air
MX2020007615A MX2020007615A (es) 2018-01-17 2019-01-17 Amortiguador de aire.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201862618206P 2018-01-17 2018-01-17
US201862618142P 2018-01-17 2018-01-17
US62/618,142 2018-01-17
US62/618,206 2018-01-17

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WO2019143863A1 true WO2019143863A1 (fr) 2019-07-25

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PCT/US2019/014085 WO2019143863A1 (fr) 2018-01-17 2019-01-17 Clapet à air

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EP (1) EP3740722A1 (fr)
CN (2) CN116447739A (fr)
CA (1) CA3088804A1 (fr)
MX (1) MX2020007615A (fr)
WO (1) WO2019143863A1 (fr)

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EP3896403A1 (fr) * 2020-04-15 2021-10-20 Johnson Controls Technology Company Valve ecoair à solénoïde pneumatique pour fournir une fonction d'autozéro à un capteur de pression de vitesse d'air

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FR2748308A1 (fr) * 1996-05-06 1997-11-07 Valeo Climatisation Volet pivotant a levre d'etancheite pour dispositif de ventilation
US20040238046A1 (en) * 2002-11-21 2004-12-02 Hoffman Herbert L. Fluid control valve
EP1783409A1 (fr) * 2005-11-08 2007-05-09 Delphi Technologies Inc. Clapet de soupape à faible niveau sonore et vanne avec un tel clapet
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EP3896403A1 (fr) * 2020-04-15 2021-10-20 Johnson Controls Technology Company Valve ecoair à solénoïde pneumatique pour fournir une fonction d'autozéro à un capteur de pression de vitesse d'air
US11630019B2 (en) 2020-04-15 2023-04-18 Johnson Controls Tyco IP Holdings LLP Ecoair valve with pneumatic solenoid to provide auto zero function for air velocity pressure sensor

Also Published As

Publication number Publication date
EP3740722A1 (fr) 2020-11-25
MX2020007615A (es) 2020-11-24
CN112136008A (zh) 2020-12-25
CA3088804A1 (fr) 2019-07-25
CN116447739A (zh) 2023-07-18
CN112136008B (zh) 2023-05-05

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