US20080242216A1 - Air-conditioning system for a room - Google Patents

Air-conditioning system for a room Download PDF

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Publication number
US20080242216A1
US20080242216A1 US12/057,946 US5794608A US2008242216A1 US 20080242216 A1 US20080242216 A1 US 20080242216A1 US 5794608 A US5794608 A US 5794608A US 2008242216 A1 US2008242216 A1 US 2008242216A1
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US
United States
Prior art keywords
air
conditioning system
room
ceiling
openings
Prior art date
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Abandoned
Application number
US12/057,946
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English (en)
Inventor
Gilles Serinet
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DATA 4
Original Assignee
DATA 4
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Assigned to DATA 4 reassignment DATA 4 ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SERINET, GILLES
Publication of US20080242216A1 publication Critical patent/US20080242216A1/en
Abandoned 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
    • F24F13/12—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of sliding members
    • 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
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • 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
    • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20718—Forced ventilation of a gaseous coolant
    • H05K7/20745—Forced ventilation of a gaseous coolant within rooms for removing heat from cabinets, e.g. by air conditioning device
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F24F11/0001—Control or safety arrangements for ventilation
    • F24F2011/0006—Control or safety arrangements for ventilation using low temperature external supply air to assist cooling
    • 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
    • F24F2110/10—Temperature

Definitions

  • the invention relates to air-conditioning systems, and their supports and terminal element.
  • the invention relates more particularly to ceiling air-conditioning systems intended to adjust the temperature of a room to a given set temperature, by sending cold or hot air into the room.
  • the invention can be applied particularly to cooling rooms containing computer means, such as computer rooms of data-processing centres (also known as data centres ). In fact, they generally need to be kept at a temperature not exceeding a determined threshold temperature, so as not to risk damage to computer equipment or networks stored there. This computer equipment or these networks, which function continuously, heat up and inevitably boost the temperature of the room.
  • Air-conditioning systems are thus necessary.
  • the most popular system used in this situation is an air-conditioning system placed under a false floor composed of perforated tiles or tiles equipped with grilles, which projects cold air through the perforations of the tiles in the direction of the ceiling.
  • the projected air thus keeps the temperature of the room at a given set temperature, by accompanying the rising hot air.
  • This air-conditioning system does have however a number of disadvantages, including the impossibility of evenly regulating the temperature within the room, which proves particularly annoying.
  • the air blown through the tiles of the floor is intended to be distributed uniformly in the room, but its passage is blocked by connecting cables, generally placed under the floor for convenience. Therefore, not only is cooling of the room not performed optimally, but it is also done independently of the thermal gradients present in the volume to be cooled.
  • a computer room of a data-processing centre has a significant thermal gradient, due especially to the different computer equipment operating.
  • the false floor must support the weight of the equipment sitting in the room, constituting a strict requirement for its size and requiring a high manufacturing cost.
  • the document WO 99/0411 proposes placing air-conditioning means in a false ceiling comprising porous acoustic tiles, the false ceiling being located at a distance from the ceiling of the room to be temperature-adjusted.
  • the air sent by a fan circulates between the ceiling and the false ceiling, and is pushed through the porous gaps in the tiles by application of pressure.
  • this system does not adapt the air-conditioning to the thermal gradients of the room, and fails to propose solutions to the problems of maintenance and upkeep posed by the presence of cables under a false floor.
  • An aim of the invention is thus to eliminate these disadvantages of the prior art by proposing an air-conditioning system for cooling a computer room of a data-processing centre.
  • Another object of the invention is to propose an air-conditioning system for regulating diffusion of air as a function of thermal gradients of the room in which it is installed.
  • Another object of the invention is to propose an air-conditioning system ensuring the temperature of the room is maintained according to a set temperature under all circumstances.
  • Another object of the invention is to propose an air-conditioning system whereof the maintenance is facilitated relative to conventional systems.
  • Another object of the invention is to propose an air-conditioning system whereof the upkeep operations are facilitated relative to conventional systems.
  • an aim is to propose a room housing computer means, fitted with an air-conditioning system according to the invention, in which the cables do not hamper general upkeep and maintenance.
  • the invention proposes an air-conditioning system of a room, comprising means for diffusing air in the room and regulating means for diffusion of the blown air, characterised in that said means are intended to be placed at the level of the ceiling of the room, and in that the regulating means are suitable for spatially modulating the diffusion of air in the room.
  • said means are intended to be placed in a false ceiling, at a distance from the ceiling of the room.
  • a room housing computer equipment characterised in that it comprises an air-conditioning system as claimed in any one of the preceding claims.
  • FIG. 1 illustrates a room in section fitted with an air-conditioning system according to the invention
  • FIG. 2 a shows diffusion means of the air-conditioning system according to a first embodiment, in a first diffusion position
  • FIG. 2 b shows diffusion means of the air-conditioning system according to the first embodiment, in a second diffusion position
  • FIG. 2 c shows diffusion means of the air-conditioning system according to the first embodiment, in a third diffusion position
  • FIG. 2 d shows diffusion means of the air-conditioning system according to the first embodiment, in a fourth diffusion position
  • FIG. 3 a shows diffusion means of the air-conditioning system according to a second embodiment, in a first diffusion position
  • FIG. 3 b shows diffusion means of the air-conditioning system according to the second embodiment, in a second diffusion position
  • FIG. 3 c presents diffusion means of the air-conditioning system according to the second embodiment, in a third diffusion position.
  • the air-conditioning system comprises diffusion means 2 , as well as means for regulating the air flow sent into the room 1 by the diffusion means 2 .
  • the diffusion means are preferably openings 2 made in a false ceiling 3 .
  • the false ceiling 3 is intended to be placed at a distance from the ceiling 4 a of the room 1 , so as to leave a free space 5 for passage of air.
  • the air flow 6 is sent by a fan, located upstream of the diffusion means 2 , towards the space 5 .
  • a fan located upstream of the diffusion means 2 , towards the space 5 .
  • at least one radiator grille 7 is placed at the entry of the space 5 , and deflects air flow 6 .
  • the flow then follows a direction A parallel to the ceiling 4 a and the false ceiling 3 , and is thus spread out so that it can evenly sweep the entire surface of the false ceiling 3 in the space 5 .
  • Pressurising of the air by the fan forces the air through the openings 2 made in the false ceiling 3 , according to the direction B, towards the interior of the room 1 .
  • the air is then aspirated by recovery means 20 , preferably placed near the floor 4 c , in a side wall 4 b of the room 1 , for optimal cooling of the room 1 favouring circulation of the force air.
  • recovery means 20 aspirate force air, whereof the temperature has increased during its circulation in the room 1 , and heat it outside the room 1 .
  • the displaced air is then rejected to the exterior, or recycled then reutilised by the air-conditioning system if the latter is operating in closed or semi-closed system.
  • the recovery means 20 can also comprise means for filtering recycled air.
  • Conventional fire detection means placed in front of the recovery means 20 which detect the presence of smoke in the when it is aspirated, and means for managing the humidity of the room can also be provided.
  • the regulating means of the air force flow in the room 1 are suitable for spatially modulating diffusion of the air flow in the room 1 , by selectively modifying the size of the openings 2 .
  • the openings 2 are preferably perforations made in the false ceiling 3 .
  • the regulating means are partial blocking means (as shown in FIGS. 2 b , 2 c and 3 b ) or total blocking means (as shown in FIGS. 2 d and 3 c ) of the free cross-sections of the perforations 2 , controlled individually at the level of each perforation, or by group of perforations.
  • the groups of perforations are for example a set of adjacent perforations 2 , the number of perforations 2 making up such a group depending on the scale of spatial modulation preferred for temperature regulation.
  • the groups comprise a lesser number of perforations if the aim is to finely modulate regulation of the flow, if the aim is simply to adapt diffusion to a weak temperature gradient in the room.
  • Regulating the free sections can be done manually, or due to electric control means, as a function of a set temperature. If needed, temperature sensors are placed in the room 1 and output a signal representative of the thermal gradient of the room 1 , such that the control means control the free section of the perforations 2 as a function of the information transmitted by said sensors, and of the recorded set temperature.
  • the false ceiling is made up of at least two grilles 30 and 40 , superposed on one another, in which the perforations are made.
  • the perforations are preferably of identical size and form, and distributed evenly in the plane of each grille 30 , 40 of the false ceiling 3 , such that it is possible to place each perforation of a grille 30 opposite a perforation made in the other grille 40 to form openings 2 connecting the space 5 above the false ceiling 3 and the room 1 .
  • Each grille 30 , 40 can be any size and form. Two grilles 30 , 40 superposed on one another are preferably identical.
  • the false ceiling 3 preferably comprises a plurality of adjacent panels 50 of the above-mentioned type, covering the entire surface of the ceiling 4 a , or at least the majority.
  • the part of the false ceiling 3 covered by the panel 50 has a series of openings 2 via which the air can pass freely, and when the grilles 30 and 40 are offset transversally or longitudinally relative to one another the openings 2 are of a lesser size, as shown in FIGS. 2 b and 2 c , or even zero, as shown in FIG. 2 d , where the air flow able to pass through is thus reduced.
  • Diffusion of the air flow sent into the room 1 can thus be modulated spatially by zones, by adding to the free section of the openings 2 at the level of each panel 50 according to the desired temperature in the subjacent part of the room 1 .
  • the surface of the regulated zones is then equal to the surface of the panels 50 constituting the false ceiling 3 .
  • the perforations 2 can have any geometry, for example rectangular or circular.
  • the perforations preferably have an oblong geometry to avoid any problem singularity (due to the presence of angles, as can be the case with rectangular openings), and can regulate the diffused air more precisely and more easily.
  • any problem singularity due to the presence of angles, as can be the case with rectangular openings
  • shifting one grille 30 relative to the other 40 would cause irregular variation of the free section of the perforations, and thus of the quantity of flow sent into the room, whereas oblong geometry enables more linear modification.
  • the respective positioning of the grilles 30 and 40 can be done manually. In this case, the grilles 30 and 40 of a panel 50 are shifted relative to one another until the openings 2 have the right size. The grilles 30 and 40 can then be kept superposed in position to avoid any undesirable variation in their free sections, which would change the regulating of the air diffusion by blocking them by means of thumbwheels.
  • the grilles 30 and 40 can also be positioned using electric control means, which shift the grilles 30 and 40 relative to one another, as a function of the thermal gradient of the room 1 , and of the set temperature.
  • each opening 2 made in the false ceiling is associated with a diaphragm 60 , allowing its size to be modified.
  • the diaphragm is particularly adapted for modulating diffused air flow in the room, the latter simply modifying the diameter of the circular opening. Regulating can thus be easily controlled.
  • Blocking the openings 2 by means of the diaphragm is preferably controlled by control means attached to a given set temperature. It can also be done by a group openings in the false ceiling 3 , these groups defining regulating zones, or individually, at the level of each opening.
  • the fan 10 When the air-conditioning system is installed in a place 1 housing computer means, such as a computer room of a data-processing centre, the fan 10 is connected to at least one central air-conditioning unit, preferably several, and sends cold air towards the radiator grilles 7 at a flow rate of the order of 27 km 3 ⁇ h 31 1 .
  • the air is thus projected rapidly into the space 5 , formed between the ceiling 4 a and the false ceiling 3 , ensuring both proper distribution in the space 5 prior to diffusion in the room 1 , and also boosting the pressure applied by the air to the false ceiling 3 , and thus the diffusion force of the air flow via the openings 2 .
  • the connecting cables 71 can be laid in cable paths 70 placed at height in the room 1 , preferably under the false ceiling 3 , each cable path 71 being specific to the type of cable laid. Strong currents, weak currents and fiberoptic networks can thus be laid separately in three separate cable paths for example. The installations are then apparent and thus better controlled.
  • the problems associated with the false floor, now useless, are resolved by making maintenance and upkeep (cleaning) operations easier, without any heavy operation, such as disassembling tiles, being necessary.
  • the air-conditioning system according to the invention is not limited to the cooling of rooms housing computer means, such as computer rooms of data-processing centres. It can also be adapted to cooling and/or heating of more conventional rooms.
  • air in the room fitted with the system can be diffused adjustably by varying the size of the openings made in the false ceiling:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Duct Arrangements (AREA)
  • Air Conditioning Control Device (AREA)
  • Ventilation (AREA)
US12/057,946 2007-03-30 2008-03-28 Air-conditioning system for a room Abandoned US20080242216A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0754195 2007-03-30
FR0754195A FR2914400B1 (fr) 2007-03-30 2007-03-30 Systeme de climatisation d'une piece

Publications (1)

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US20080242216A1 true US20080242216A1 (en) 2008-10-02

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US12/057,946 Abandoned US20080242216A1 (en) 2007-03-30 2008-03-28 Air-conditioning system for a room

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US (1) US20080242216A1 (fr)
EP (1) EP1976360B1 (fr)
CA (1) CA2626912C (fr)
ES (1) ES2737423T3 (fr)
FR (1) FR2914400B1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US911457A (en) * 1908-09-23 1909-02-02 Alexander William Stewart Ventilating-louver.
US1740626A (en) * 1928-05-31 1929-12-24 Joseph V Petrelli Sliding register
US2223940A (en) * 1937-04-10 1940-12-03 Budd Edward G Mfg Co Ventilating system
US2859681A (en) * 1956-03-28 1958-11-11 Joel R Rachlin Air-flow ceiling arrangements
US3223019A (en) * 1963-08-19 1965-12-14 Kaiser Gypsum Company Inc Lineal air diffuser
US3308741A (en) * 1965-05-28 1967-03-14 Chambers John Edward Ventilating air diffuser apparatus
US3418915A (en) * 1966-08-18 1968-12-31 Farr Co Clean air ceiling module
US3638404A (en) * 1969-09-30 1972-02-01 Westinghouse Electric Corp Vertical laminar-flow clean room of flexible design
US3564770A (en) * 1969-10-27 1971-02-23 Joanna Western Mills Co Closure structure
US3824909A (en) * 1970-04-08 1974-07-23 Cgt Corp Distribution system for clean rooms
US3975995A (en) * 1975-03-13 1976-08-24 American Air Filter Company, Inc. Ventilated ceiling construction
US4426918A (en) * 1980-04-25 1984-01-24 Lambert Robert R Proportioning air diffuser and system
US4407187A (en) * 1981-12-15 1983-10-04 Horney Robert W Air control device
US4549472A (en) * 1983-09-29 1985-10-29 Hitachi Ltd. Rearrangeable partial environmental control device
US4726285A (en) * 1985-10-16 1988-02-23 Kelley Winfield L Dimpled air distribution device
US5014608A (en) * 1989-04-27 1991-05-14 Brod & Mcclung - Pace Co. Clean room air system
US5314376A (en) * 1989-09-25 1994-05-24 Kullapat Kuramarohit Air conditioner
US5120273A (en) * 1991-09-17 1992-06-09 Lin Jyh Shyung Ventilation pane assembly
US5207614A (en) * 1991-11-07 1993-05-04 Brod & Mcclung - Pace Company Clean room air system
US5218998A (en) * 1992-04-01 1993-06-15 Bakken Gary M Linearly adjustable
US5610592A (en) * 1993-08-04 1997-03-11 Nohmi Bosai Ltd. Fire detecting apparatus
US5602435A (en) * 1993-08-17 1997-02-11 Abb Management Ag Gas-cooled electrical machine
US5518451A (en) * 1993-08-28 1996-05-21 Meissner & Wurst GmbH & Co. Lufttechnisch Anlagen Gebaude- und Verfahrenstechnik Clean room system
US5427146A (en) * 1994-06-27 1995-06-27 Bakken; Gary M. Linearly adjustable fluid damper
US6120584A (en) * 1997-01-31 2000-09-19 Takasago Thermal Engineering Co., Ltd. Air cleaning apparatus, air filter and method for manufacturing the same
US6264550B1 (en) * 1997-07-11 2001-07-24 Nippon Steel Semiconductor Corporation Clean room and method of remodeling clean room
US7000688B2 (en) * 2000-11-24 2006-02-21 Halton Oy Supply air terminal device
US20020155806A1 (en) * 2001-01-29 2002-10-24 Mcgill Joseph A. Adjustable damper for airflow systems
US6817941B1 (en) * 2001-10-25 2004-11-16 Lsi Logic Corporation Uniform airflow diffuser
US6986708B2 (en) * 2002-05-17 2006-01-17 Airfixture L.L.C. Method and apparatus for delivering conditioned air using dual plenums
US6694759B1 (en) * 2003-01-27 2004-02-24 Hewlett-Packard Development Company, L.P. Pressure control of cooling fluid within a plenum using automatically adjustable vents
US7232369B2 (en) * 2003-04-04 2007-06-19 Smithgroup, Inc. System and method for providing heating, ventilation and air conditioning
US6981915B2 (en) * 2004-03-15 2006-01-03 Hewlett-Packard Development Company, L.P. Airflow volume control system
US7189158B2 (en) * 2004-09-29 2007-03-13 Caterpillar Inc Airflow control system
US20070057078A1 (en) * 2005-09-13 2007-03-15 Martin William J Closed air handling system with integrated damper for whole-building ventilation

Also Published As

Publication number Publication date
EP1976360A3 (fr) 2014-06-04
EP1976360B1 (fr) 2019-05-08
CA2626912C (fr) 2012-08-21
FR2914400A1 (fr) 2008-10-03
CA2626912A1 (fr) 2008-09-30
EP1976360A2 (fr) 2008-10-01
ES2737423T3 (es) 2020-01-14
FR2914400B1 (fr) 2009-06-26

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