EP0157507A2 - Système de conditionnement d'air - Google Patents

Système de conditionnement d'air Download PDF

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Publication number
EP0157507A2
EP0157507A2 EP85301636A EP85301636A EP0157507A2 EP 0157507 A2 EP0157507 A2 EP 0157507A2 EP 85301636 A EP85301636 A EP 85301636A EP 85301636 A EP85301636 A EP 85301636A EP 0157507 A2 EP0157507 A2 EP 0157507A2
Authority
EP
European Patent Office
Prior art keywords
air
conditioning system
air conditioning
units
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP85301636A
Other languages
German (de)
English (en)
Other versions
EP0157507A3 (fr
Inventor
Frederick Hugh Howorth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Howorth Air Engineering Ltd
Original Assignee
Howorth Air Engineering Ltd
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 Howorth Air Engineering Ltd filed Critical Howorth Air Engineering Ltd
Publication of EP0157507A2 publication Critical patent/EP0157507A2/fr
Publication of EP0157507A3 publication Critical patent/EP0157507A3/fr
Ceased 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
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/028—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by air supply means, e.g. fan casings, internal dampers or ducts
    • F24F1/0284—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by air supply means, e.g. fan casings, internal dampers or ducts with horizontally arranged fan axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
    • F24F1/0323—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
    • F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels

Definitions

  • This invention relates to an air conditioning system, particularly but not exclusively for environmental control of a computer room.
  • All current air conditioning systems for large main frame computers simply involve blowing a lot of cool air at approximately 12 to 15 0 C into an underfloor void beneath the room in which the computer is housed. This air emerges through holes which have been cut in the floor beneath each of the computer modules (which are generally about 1m x 1m and 2m high), permeates up through the respective modules and out through grilles at the top of each. Electrical connecting cables of the various modules extend through the same holes in the floor. Additiohally, air from the same source is usually blown directly into the room through slots in the floor so as to provide ventilation for operatives working in the room.
  • each module consists of closely packed vertically arranged printed circuit boards (PCBS), each about t sq m in size, carrying a fine meshwork of wiring. Any build-up of dust or area of high or low humidity can cause a bridge to form between wires (in the case of high humidity this occurs due to condensation and in the case of low humidity this occurs due to static) and give rise to short circuiting.
  • PCBS printed circuit boards
  • the problem underlying the present invention is the provision of an air conditioning system in which the above-mentioned disadvantages are minimised and which is more economical in size, capital cost and running cost than the present system.
  • the present invention provides an air conditioning system comprising at least two operative air supply units each in the form of a housing enclosing impeller means operative to draw air into the housing can cause same to flow through filter means and cooling means whereby it is rendered substantially free of contaminants and cooled, and out of the housing via one or more ducts extending beneath floor level to equipment, such as a computer, characterised in that the air supply units are arranged side by side with adjustable dampers provided therebetween so that in the event of failure of one unit, the dampers at one or both sides of that unit may be automatically opened to allow air from other units to supply the equipment connected to that unit until such time as it is repaired, and in that temperature sensors are provided to control the speed of operation of the respective impeller means and/or the temperature of the respective cooling means.
  • each housing includes a plenum chamber beneath floor level and air flows therefrom into the ducts by way of an orifice plate, that is to say a plate having openings of variable area.
  • the area of the openings will be set when each unit is installed depending on the required volume of air flow to deal with expected heat emissions from the relevant equipment. However, the setting of the opening area may be altered from time to time whenever it is deemed necessary.
  • the dampers are preferably located between the plenum chambers of adjacent units.
  • Air flow sensors may be disposed in each plenum chamber and/or adjacent air outlets of the equipment being supplied with clean air in order to react to failure of the equipment by actuating the damper opening mechanism and increasing the speed of operation of the impeller means.
  • the above-mentioned temperature sensors or other temperature sensors may also carry out this function.
  • the air conditioning system of the invention comprises a number of air supply units and Fig. 1 illustrates, by way of example, three such units 10, 11, 12. Each consists of a housing 13 enclosing variable speed impeller means in the form of a variable speed fan 14, filter means 15, and cooling means 16. Filter means 15 of different types are shown diagrammatically in Fig. 1. Typically air filtration will be to about 5 microns. In each unit 10, 11, 12 the filter means 15 is arranged at the top of the housing 13 between an air inlet and the fan 14.
  • the cooling means 16 is arranged therebeneath and typically comprises a refrigeration unit 17 and an adjacent air passage 18, as shown in Fig. 2. Cooling coils 19 are arranged transversely across the air passage 18.
  • Each housing 13 extends beneath floor level 20 to form a respective plenum chamber 21 which communicates with air supply ducts (not shown) extending beneath the floor 20 by way of orifice plates 22 which have openings of variable area.
  • An air flow sensor and an air temperature sensor are located in the plenum chamber 21 of each housing 13. The units are positioned adjacent each other as shown in Fig. 1, and there is an adjustable damper 23 between the adjacent plenum chambers 21.
  • the proposed air conditioning system is particularly designed for air conditioning computers and computer rooms and its operation will be described in relation to this special function.
  • each unit 10, 11, 12 will be installed side by side, e.g. adjacent one wall in a computer room.
  • Each unit may, for example, supply conditioned air to three computer modules.
  • the orifice plates 22 of each unit 10, 11, 12 will be set for an appropriate air volume to be supplied from each, typically 4,000 to 6,000 cu ft/min.
  • air is drawn into each housing 13 and passes downwards through the filter means 15 and the cooling means 16 to the respective plenum chambers 22.
  • the temperature sensors in the respective plenum chambers maintain the air supply from the respective units at a constant temperature of e.g. 12°C.
  • the conditioned air is supplied to the base of the respective computer modules by the underfloor ducts and it flows up through the PCBs substantially equalising the temperature thereof and also sweeping away any excess moisture and dust.
  • the proposed air supply units should each have a capacity about 30% higher than that normally required in order to provide a back-up system in the event of breakdown of one such unit, i.e. to provide non-stop 24 hour air conditioning to the perpetually working computers.
  • the air- flow or temperature sensor for the failed unit will react to operate a mechanism withdrawing the dampers 23 at one or both sides of the respective plenum chamber 21 so that adjacent units can temporarily help out by supplying air to that chamber and hence to the modules usually supplied by the broken down unit.
  • the air flow sensor for the failed unit would also operate to increase the rate of operation of the fans of the adjacent units sufficient to compensate for the lack of air supply via the failed unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ventilation (AREA)
  • Central Air Conditioning (AREA)
  • Duct Arrangements (AREA)
EP85301636A 1984-03-28 1985-03-08 Système de conditionnement d'air Ceased EP0157507A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8407992 1984-03-28
GB848407992A GB8407992D0 (en) 1984-03-28 1984-03-28 Air conditioning system

Publications (2)

Publication Number Publication Date
EP0157507A2 true EP0157507A2 (fr) 1985-10-09
EP0157507A3 EP0157507A3 (fr) 1986-02-05

Family

ID=10558787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85301636A Ceased EP0157507A3 (fr) 1984-03-28 1985-03-08 Système de conditionnement d'air

Country Status (2)

Country Link
EP (1) EP0157507A3 (fr)
GB (1) GB8407992D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320720A3 (fr) * 1987-12-14 1990-01-10 Siemens Aktiengesellschaft Système de refroidissement ininterrompu pour un ordinateur
US5121291A (en) * 1991-02-13 1992-06-09 Mentor Systems, Inc. Ventilation system in a portable computer
US5249741A (en) * 1992-05-04 1993-10-05 International Business Machines Corporation Automatic fan speed control
WO1999044272A1 (fr) * 1998-02-27 1999-09-02 Sundstrand Corporation Machine electrodynamique a entrefer axial
US6216235B1 (en) 1994-06-20 2001-04-10 C. Douglass Thomas Thermal and power management for computer systems
US7167993B1 (en) 1994-06-20 2007-01-23 Thomas C Douglass Thermal and power management for computer systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865182A (en) * 1973-08-30 1975-02-11 Coleman Company Combination air conditioner and heater
FR2442407A1 (fr) * 1978-11-23 1980-06-20 Burgarella Joseph Installation de climatisation et de protection contre l'incendie

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320720A3 (fr) * 1987-12-14 1990-01-10 Siemens Aktiengesellschaft Système de refroidissement ininterrompu pour un ordinateur
US5121291A (en) * 1991-02-13 1992-06-09 Mentor Systems, Inc. Ventilation system in a portable computer
US5249741A (en) * 1992-05-04 1993-10-05 International Business Machines Corporation Automatic fan speed control
US6216235B1 (en) 1994-06-20 2001-04-10 C. Douglass Thomas Thermal and power management for computer systems
US6487668B2 (en) 1994-06-20 2002-11-26 C. Douglass Thomas Thermal and power management to computer systems
US7167993B1 (en) 1994-06-20 2007-01-23 Thomas C Douglass Thermal and power management for computer systems
US7293186B2 (en) 1994-06-20 2007-11-06 Thomas C Douglass Thermal and power management for computer systems
US7418611B1 (en) 1994-06-20 2008-08-26 Thomas C Douglass Thermal and power management for computer systems
US7506190B2 (en) 1994-06-20 2009-03-17 Thomas C Douglass Thermal and power management for computer systems
US7937599B1 (en) 1994-06-20 2011-05-03 Ipventure, Inc. Thermal and power management for computer systems
WO1999044272A1 (fr) * 1998-02-27 1999-09-02 Sundstrand Corporation Machine electrodynamique a entrefer axial

Also Published As

Publication number Publication date
EP0157507A3 (fr) 1986-02-05
GB8407992D0 (en) 1984-05-10

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Effective date: 19880324

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOWORTH, FREDERICK HUGH