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WO2011050190A1 - Procédé et appareil de conditionnement d'air pour bureau - Google Patents

Procédé et appareil de conditionnement d'air pour bureau Download PDF

Info

Publication number
WO2011050190A1
WO2011050190A1 PCT/US2010/053593 US2010053593W WO2011050190A1 WO 2011050190 A1 WO2011050190 A1 WO 2011050190A1 US 2010053593 W US2010053593 W US 2010053593W WO 2011050190 A1 WO2011050190 A1 WO 2011050190A1
Authority
WO
WIPO (PCT)
Prior art keywords
diffuser
desktop
grille
air
generally
Prior art date
Application number
PCT/US2010/053593
Other languages
English (en)
Inventor
Michael J. Mcqueeny
Pedro J. Bermudez
Frank A. Lemay
Original Assignee
Walnut Manufacturing LLC
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 Walnut Manufacturing LLC filed Critical Walnut Manufacturing LLC
Publication of WO2011050190A1 publication Critical patent/WO2011050190A1/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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B13/00—Details of tables or desks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2200/00—General construction of tables or desks
    • A47B2200/06—Desks with inlet and evacuation of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/10—Details or features not otherwise provided for combined with, or integrated in, furniture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/40—HVAC with raised floors

Definitions

  • the present invention relates to a method and apparatus for providing desktop air conditioning. More particularly, this invention relates to a diffuser for use in combination with a raised floor air distribution system, wherein the diffuser is received in an opening in a desktop and provides a low profile air distribution component.
  • FIGs. 1 and 2 illustrate a prior art raised floor air distribution system that was modified to provide personalized or individually controllable distribution of conditioned air to individual desks. While it is important that any air distribution system adequately control the temperature of the rooms as a whole, such may not be sufficient to accommodate the individual needs of persons in the rooms. Thus, while the room may be of a desired overall temperature, individuals in the room may have different desires as to the temperature in their specific locations. This is of particular concern in office buildings where individuals are asked to sit for long periods at a time at a specific location, such as at a desk and/or in a cubicle.
  • FIGs. 1 or 2 attempted to accommodate the individual desires of a person sitting at a desk by providing a desk with a flow of conditioned air through a duct which would deliver the conditioned air out the front of the desk beneath the desktop.
  • the individual at the desk would have the ability to control the amount of air flowing through the duct underneath the desk and therefore the amount of air coming out of the desk.
  • this prior art system had several shortcomings that prevented widespread adoption.
  • the conditioned air was provided to an individual's lap or waist.
  • it is their upper body or torso that is in need of cooling, not their waist or legs.
  • FIG. 3 illustrates an alternate prior art embodiment that attempted to address the shortcomings of the system of FIGs. 1 and 2.
  • the prior art system illustrated in FIG. 3 discloses a desktop air conditioning system that makes use of a pair of air terminals or towers that extend or protrude upwardly from the desktop.
  • a control box is also positioned on the desktop to permit the occupant to control the temperature and volume of air flowing through the system.
  • conditioned air In a cooling mode, conditioned air would be drawn up from a plenum underneath the floor upon which the user's chair sits. The conditioned air would pass through the ductwork and be forced out the front of the desktop units through manually adjustable louvers that are akin to the louvers found in automobile air distribution systems.
  • the individual air terminals included knobs that control the volume of air through the face of the unit.
  • the user may use the control panel to turn on a radiant heat panel adjacent the user's feet. This is because it has generally been found that when a user is cold, it is their feet that require heating. As such, the radiant panel by their feet emits warmer air. In this mode, the system can also intake the warmer air by the floor up into the ductwork and disperse it out the individual air distribution towers.
  • FIG. 3 While the system illustrated in FIG. 3 represented an improvement over the prior art system illustrated in FIGs. 1 and 2, the prior art system in FIG. 3 also has numerous shortcomings that have prevented widespread adoption of the system. Initially, the system is quite complex and is therefore expensive to manufacture and install.
  • the control panel that sits on the desk must be connected to a number of items in order to control the various functions of the unit. In addition to having to have the control panel on the desktop, the occupant must also deal with having to have the two air distribution towers protruding up from the desktop. In a cubicle-type environment, desktop space is often at a premium and having to have three large components sitting on the desktop is often undesirable.
  • the method and apparatus of the present desktop air distribution system overcomes these and other drawbacks by providing a system which is low profile, simple to operate, and significantly less expensive to install.
  • the system includes preferably, a pair of flexible tubular ducts that extend upwardly from openings in a floor tile of a raised floor air distribution system.
  • the ducts engage with an underneath side of a low profile desktop diffuser.
  • the diffuser includes a plurality of fins therein which direct the flow of air through an upper surface of the diffuser and out of the diffuser in a direction that is generally along the upper surface of the desk. In this manner, the air is directed to the occupant's torso and chest to provide cooling where desired.
  • the diffuser is a variable volume diffuser that includes a pair of plates that cooperate to control the volume of air flowing through the diffuser.
  • the diffuser presents a low profile on the desktop and takes up a minimal amount of desk surface area.
  • FIGs. 1-16 illustrate several possible embodiments of the present invention, and in which:
  • FIG. 1 is a side elevation view of a prior art system for providing conditioned air to individual desks using an under floor air distribution system with a plenum;
  • FIG. 2 is a perspective view of an individual desk outfitted with the prior art system of FIG. 1;
  • FIG. 3 is a side elevation view of an alternate prior art system for providing conditioned air to individual desks using an under floor air distribution system with a plenum;
  • FIG. 4 is a side elevation view of a system for providing conditioned air to individual desks using an under floor air distribution system with a plenum in accordance with an embodiment of the present invention
  • FIG. 5 is a perspective view of a desk of FIG. 4 outfitted with an embodiment of the present invention
  • FIG. 6 is an enlarged side elevation view of one of the desks of FIG. 4 with a user seated at the desk;
  • FIG. 7 is a perspective view of an alternate embodiment of a desktop air conditioning system of the present invention.
  • FIG. 8 is an enlarged perspective view of an embodiment of an adjustable desktop diffuser of the present invention with a portion of a desktop cut away for clarity;
  • FIG. 9 is a fragmentary exploded perspective view of the diffuser of FIG. 8 with a portion thereof cut away for clarity;
  • FIG. 10 is a bottom perspective view of the diffuser of FIG. 8 with a portion of a stationary plate cut away for clarity;
  • FIG. 11 is a bottom plan view of the diffuser of FIG. 8 with a movable plate in an open position;
  • FIG. 12 is a bottom plan view of the diffuser of FIG. 8 with the movable plate in a partially closed position;
  • FIG. 13 is a bottom plan view of the diffuser of FIG. 8 with the movable plate in a closed position;
  • FIG. 14 is a top plan view of the diffuser of FIG. 8 with the movable plate omitted;
  • FIG. 15 is an enlarged fragmentary side elevation view of the diffuser of FIG. 14 with a portion cut away for clarity;
  • FIG. 16 is a fragmentary perspective view of an embodiment of a constant volume diffuser of the present invention with a portion of the diffuser cut away for clarity.
  • numeral 10 generally designates a desktop air conditioning system arranged in accordance with an embodiment of the present invention.
  • the system 10 is implemented in a building 12 having walls 14 and structural floors 16.
  • the structural floors 16 can be concrete slabs and one structural floor 16 may be a ceiling to help define a room 18.
  • Often the lower surface of a structural floor 16 that is used as a ceiling is hidden from view by a false or a dropped ceiling (not shown).
  • the building 12 preferably also has a raised floor air distribution system 20.
  • the raised floor air distribution system 20 includes a plurality of floor tiles 22 that are supported above the structural floor 16 to create an operating floor 24.
  • the floor tiles 22 are supported by a plurality of adjustable pedestals or stands 26.
  • An air handling unit (not shown) provides conditioned air to the plenum 28 underneath the operating floor 24.
  • the plenum 28 is kept at a positive pressure when compared to the pressure of the ambient air in the room 18. As such, the conditioned air will attempt to move from the plenum 28 into the room 18 when permitted to do so.
  • a floor terminal 30 may be provided in a floor tile 22 to accommodate the passage of air from the plenum 28 into the room 18, as illustrated by the arrows 32.
  • the system 10 is preferably coupled with the plenum 28 by way of a floor unit 34.
  • the floor unit 34 may be of a similar size as the floor terminal 30 such that the floor unit 34 may be placed in a standard opening of a floor tile 22 for a floor terminal 30.
  • the floor unit 34 may be of a smaller size to decrease the size of the opening through the floor tile 22 into which the floor unit 34 is received.
  • the floor unit 34 permits conditioned air from the plenum 28 to pass therethrough into the desktop air conditioning system 10, as discussed in more detail below.
  • the desktop air conditioning system 10 includes at least one supply duct 36 and a desktop diffuser 38. As illustrated in FIGs. 5 and 7, the desktop air conditioning system 10 may be implemented with a pair of supply ducts 36 coupled with a pair of desktop diffusers 38. As illustrated in FIG. 5, the floor unit 34 may take the shape of a rectangular metal plate or lid for covering an opening in a floor tile 22 and having a pair of openings therethrough to permit the ducts 36 to be in fluid communication with the plenum 28. In the embodiment illustrated in FIG. 5, the floor unit 34 is provided with a pair of cylindrical collars (not shown) that extend upwardly from an upper surface of the plate like portion of the floor unit 34.
  • These collars provide a structural portion of the floor unit 34 onto which ends of the supply duct 36 may be received and to which they may be coupled.
  • a floor unit 34 may be omitted and the supply ducts 36 may be directly coupled with floor tiles 22 around openings therein.
  • the supply ducts 36 may be rigid, as illustrated in FIG. 7, or flexible tubing, as illustrated in FIG. 5.
  • the supply duct 36 may have any type of configuration, beyond just the cylindrical configuration illustrated.
  • the desktop air conditioning system 10 is preferably implemented in a desk 40 having a work surface or desktop 42 with a generally horizontal upper surface 44.
  • An opening 46 is provided in the desktop 42 to receive a portion of the desktop diffuser 38, as illustrated in FIG. 8.
  • FIG. 8 also illustrates that the diffuser 38 is coupled with an upper end 48 of the supply duct 36.
  • a lower end 50 of the supply duct 36 is coupled with a floor unit 34 or directly with a floor tile 22.
  • the desktop diffuser 38 will now be described in more detail.
  • the diffuser includes a grille portion 52 and a body portion 54.
  • the grille portion takes the shape of a circular disc-like member and the body portion takes the shape of a cylindrical member, such as a section of a pipe or tube.
  • the grille portion 52 has an upper surface 56 that is also the upper surface of the desktop diffuser 38.
  • the upper surface 56 is preferably flat or planar, for reasons that will be discussed below, and oriented in a generally horizontal position.
  • the body portion 54 is preferably coupled with a lower surface 58 of the grille portion 52 adjacent an upper or proximal edge 60 of the body portion 54 such that the body portion 54 depends downwardly from the grille portion 52, as illustrated in FIGs. 8 and 9.
  • the grille portion 52 has an outer periphery 62 of a first circumference and the body portion 54 has an outer surface 64 that defines a second circumference. As illustrated in FIG. 10, the first circumference of the grille portion 52 is larger than the second circumference of the body portion 54 such that an outwardly depending lip 66 is created about the proximal edge 60 of the body portion 54.
  • the lip 66 includes an annular ring of the lower surface 58 of the grille portion 52.
  • the raised floor air distribution system 20 with its floor terminals 30 provide general control of the temperature in the room 18.
  • the desktop air conditioning system 10 of the present invention supplements those efforts by providing individualized, personalized, and customizable conditioned air to individual users 72 to help accommodate the different temperature desires of occupants of the building 12.
  • the desktop air conditioning system 10 can be used by the user 72 in FIG. 6 to provide cooler air from the plenum 28 when the user 72 feels hot.
  • the conditioned air that passes through the diffuser 38 should be primarily directed at the user's upper body or torso 74.
  • the fins 68 are angled with respect to the upper surface 56 to direct the flow of air, as represented by the arrows 76 in FIG. 6, primarily along the upper surface 44 of the desktop 42.
  • the fins 68 were designed accordingly.
  • the fins include an angled upper surface 78 and an angled lower surface 80.
  • the angled upper surface 78 preferably slopes downwardly from the upper surface 56 an angle a and the angled lower surface 80 slopes downwardly with respect to the upper surface 56 and angle ⁇ .
  • the angle a is preferably between 15°-55° and, in one embodiment, is approximately 35°.
  • the angled ⁇ is in the range of 25°-65° with respect to the upper surface 56, and,, in one embodiment, is approximately 48°.
  • the angled lower surface 80 joins a downwardly facing surface 82 that provides a ledge 84 that is generally parallel to the upper surface 56.
  • the ledge 84 helps direct air coming up the lower angled surface 80 of the fin into a generally horizontal throw.
  • the fins 68 also preferably include an upper vertical wall 86 and a lower vertical wall 88.
  • the fins also include a lower surface 90 at the bottom of the angled lower surface 80 and a ridge 92 at a bottom of the angled upper surface 78.
  • the fins may also be arranged in an arcuate shape to spread the air flow out in a wide direction radially from the diffuser 38.
  • the air would be disbursed across an angle of less than 180°, with the majority of the throw being directed along a centerline of the diffuser 38 which would fall along a rib 94 that separates the two groups of air channels 70.
  • the arcuate fins 68 create arcuate air channels 70.
  • the fins can be arranged in a concentric orientation about a point 96 adjacent and edge of the grille portion 52.
  • the diffuser 38 in FIGs. 8-13 is a variable air volume diffuser.
  • the diffuser 38 includes a volume control mechanism 98.
  • the mechanism includes a movable plate 100 and a stationary plate 102.
  • the plates 100, 102 take the shape of disc-like objects and have a plurality of radially aligned pie shaped openings therethrough, thereby providing a wagon wheel appearance.
  • the plates 100, 102 are received in the body portion 54 and coupled with a hub 106 in the center of the lower surface 58 of the grille portion 52 along the rib 94 by a screw 108 that passes through the center of the plates 100, 102. As illustrated in FIG.
  • the movable plate 100 is placed closest to the grille portion 52 and includes a user engageable tab 110 that is generally perpendicular to an upper surface 112 of the movable plate 100.
  • the tab 110 extends upwardly through an arcuate slot 114 in the grille portion 52 of the diffuser 38. The user 72 may then move the tab 110 side to side to rotate the movable plate 100.
  • the stationary plate 102 can be held in place by a number of different ways.
  • an inner surface 116 of the body portion 54 includes a plurality of longitudinally extending ridges 118 thereon.
  • the stationary plate 102 has a corresponding set of notches 120 in its outer periphery 122 that align with and cooperate with the ridges 118 on the inner surface 116 of the body portion 54, as illustrated in FIG. 10.
  • the movable plate 100 has a smaller diameter than the stationary plate 102 so that the outer edge of the movable plate 100 fits within and does not engage with the ridges 118.
  • the movable plate 100 is in an open or first position, where the openings 104 in the movable plate 100 are aligned with the openings 104 in the stationary plate 102. In this position, the maximum amount of air is allowed to pass through the desktop diffuser 38.
  • the user 72 has rotated the movable plate 100 by way of the tab 110 such that a portion of the openings 104 in the stationary plate 102 are covered by portions of the movable plate 100. In this position, the air flow has been reduced by an amount somewhat less than half.
  • FIG. 13 illustrates the movable plate 100 in a second or closed position where none of the openings 104 in the movable plate 100 are aligned with the openings 104 in the stationary plate 102. As such, the volume control mechanism 98 operates to prevent the flow of air through the diffuser 38.
  • FIG. 16 illustrates an alternate embodiment of the desktop diffuser 38.
  • the desktop diffuser 38 is a constant volume diffuser and does not include a volume control mechanism 98.
  • the user 72 could still control the amount of air blown in their direction by rotating the diffuser 38 in the opening 46 in the desktop 42 such that the centerline of the throw pattern, represented by the rib 94, points away from them. The farther the user rotates the diffuser away from pointing at them, the lower the volume of air being directed to the user, and therefore the user will notice a decrease in cooling.
  • the supply ducts 36 are 4" flexible ducts and the outer surface 64 of the body portion 54 has a circumference that is sized for receipt in the ducts.
  • the floor unit 34 is 5"xl0" and is received in an opening in a 24"x24" floor tile 22.
  • the plenum 28 is kept at a pressure of .02-.1" water gauge compared to the standard pressure in the room 18. This results in a volume of air of approximately 15 cubic feet per minute being directed to the user 72 at a velocity of less than 50 feet per minute. A velocity of zero to 50 feet per minute has been found beneficial and a volume of 5-50 cubic feet per minute has also been found beneficial. The majority of the air exiting the diffuser should fall between 0°-45° angle from the desktop 42.
  • the desktop diffuser 38 is well designed to provide a low profile desktop air conditioning delivery mechanism.
  • the upper surface 56 of the diffuser 38 projects up from the desktop 42 less than one-half of one inch. More preferably, the upper surface 56 of the desktop diffuser 38 protrudes from the desktop approximately less than two- tenths of one inch.
  • the diffusers can be square in shape and the air channels be straight across as opposed to arcuate. This would provide for a more uni-directional throw of the air across the desktop.
  • Another modification would be to permit volume control of the constant volume diffuser of FIG. 16 by placing an object on top of the upper surface 56 of the diffuser 38. The user 32 could move the object back and forth across the upper surface of the diffuser to control the amount of air passing therethrough.
  • the diffuser was described as having a grille portion coupled with a body portion, the diffuser 36 may be cast as a single unitary member. Other modifications would be within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)

Abstract

La présente invention se rapporte à un procédé et à un appareil de conditionnement d'air pour bureau. Lesdits procédé et appareil fournissent de l'air conditionné à des individus assis à un bureau. Un système d'alimentation en air par un plancher surélevé comporte un plénum contenant de l'air conditionné sous le plancher surélevé sur lequel se trouvent les individus et leur bureau. De petits conduits s'étendent verticalement vers le haut du plancher jusqu'à la face inférieure du bureau où ils sont raccordés à un diffuseur de bureau. Le diffuseur de bureau dirige l'air provenant du plénum de façon sensiblement horizontale d'un côté à l'autre de la surface supérieure du bureau, vers la poitrine et le visage de l'individu. Le diffuseur de bureau a une forme extra-plate de sorte à ne pas interférer avec la surface du bureau et son esthétique.
PCT/US2010/053593 2009-10-22 2010-10-21 Procédé et appareil de conditionnement d'air pour bureau WO2011050190A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/604,160 US20110097989A1 (en) 2009-10-22 2009-10-22 Method and apparatus for desktop air conditioning
US12/604,160 2009-10-22

Publications (1)

Publication Number Publication Date
WO2011050190A1 true WO2011050190A1 (fr) 2011-04-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/053593 WO2011050190A1 (fr) 2009-10-22 2010-10-21 Procédé et appareil de conditionnement d'air pour bureau

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US (1) US20110097989A1 (fr)
WO (1) WO2011050190A1 (fr)

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