EP0337972A2 - Verfahren und Vorrichtung für die Zufuhr von klimatisierter Luft - Google Patents

Verfahren und Vorrichtung für die Zufuhr von klimatisierter Luft Download PDF

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Publication number
EP0337972A2
EP0337972A2 EP89850115A EP89850115A EP0337972A2 EP 0337972 A2 EP0337972 A2 EP 0337972A2 EP 89850115 A EP89850115 A EP 89850115A EP 89850115 A EP89850115 A EP 89850115A EP 0337972 A2 EP0337972 A2 EP 0337972A2
Authority
EP
European Patent Office
Prior art keywords
air
floor surface
supply
level
beneath
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.)
Granted
Application number
EP89850115A
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English (en)
French (fr)
Other versions
EP0337972B1 (de
EP0337972A3 (en
Inventor
Leif Ingemar Lind
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0337972A2 publication Critical patent/EP0337972A2/de
Publication of EP0337972A3 publication Critical patent/EP0337972A3/en
Application granted granted Critical
Publication of EP0337972B1 publication Critical patent/EP0337972B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems

Definitions

  • the present invention relates to a method for supplying conditioned air to one or more locations on a particular floor or story of an apartment building, or block of flats, with the aid of air conditioning plant equipment supplied with circulated air, and a box-like supply air terminal device which is located on, or capable of being placed on or in the vicinity of, the floor surface of said apartment floor or story.
  • the invention also relates to a box-like air supply terminal device, and more specifically to a device of the kind set forth in the preamble of claim 6.
  • Known air conditioning and air delivering methods and apparatus of the aforesaid kind are instrumental in causing draughts and in generating noise, particularly when the supply air terminal device is provided with separates fans or blowers. Furthermore, the known methods and apparatus have relatively poor ventilation efficiency, and consequently the occupied areas of a room or location served by such apparatus are not free from impurities and it is necessary to supply the air conditioning plant with air which is relatively pure, which further adds to the load on the plant. Exhaust air from the location served by the plant has, instead, exhibited a relatively low degree of contamination.
  • An object of the present invention is to eliminate the drawbacks of the aforesaid and other known systems, and to provide an improved air supply system, which, among other things, will enable air flow and air temperature to be controlled separately and effectively in in­dividual supply air terminal devices, thereby achieving high ventilation efficiency and high temperature efficiency.
  • a further object is to provide an air supply system which will create an improved environment and climate, particular in occupied areas of a room served by the inventive system, while simultaneously facilitating operation of the air conditioning system and improving the efficiency thereof.
  • air present in said location will be layered in varying degrees of impurity, therewith primarily improving the climate of the occupied zone of the location.
  • Contaminated air gathers or collects at a high level, close to the ceil­ing of the room served by the system and is withdrawn from said location through exhaust air terminal devices installed at this level.
  • the air present in the centre of the occupied zone or area of said location has a relatively high degree of purity and the air con­ditioning plant is supplied with circulation air of this kind, thereby relieving the plant of load to a commen­surate extent.
  • the air cleansed in the plant is supplied to the space located immediately beneath the floor, where said air is mixed effectively with directly supplied fresh air.
  • Supply air terminal devices positioned as desired in the location served by the plant will ensure that this mixture of fresh air and clean, treated air will be supplied to the room or location at a low level therein, in the absence of draughts and while being fully con­trolled, which in turn assists in the aforesaid layering of the air in said room.
  • the supply air is supplied at a level lower than 1.2 meters, i.e. at a level of about 1 meter above floor surface level, and that the circulation air is supplied to the plant at a level beneath 2.2 meters, preferably at a level of about 2 meters above floor surface level.
  • One or more exhaust air terminal devices will preferably be located at a higher position in the location or room served by the air conditioning plant, preferably in the vicinity of the ceiling of the room.
  • fresh air is preferably mixed with the treated air in the space located beneath the floor of the room, referred to hereinafter as the floor cavity.
  • a substantially constant pressure is maintained in the floor cavity, preferably by controlling the speed of a fan or blower included in the air conditioning plant.
  • the floor cavity has mounted therein a pressure sensor which is connected to the fan motor, via a control device, such as to ensure that the floor cavity will be maintained at a set pressure level. It is ensured in this way that all supply air terminal devices in the room or location being served will be supplied with air at a constant, predetermined pressure, which in turn will ensure that said devices will operate efficiently and reliably and each in a predetermined manner.
  • each supply air terminal device may be provided with a heater, so that if low ambient temperatures are constantly recorded, despite adjustments to the throttle valves, the supply air can be heated before being deliv­ered to the room.
  • the throttle valves will have the opposite function, i.e. a greater heating requirement will result in a corresponding wider opening of the valves.
  • the mixture of air treated in the air conditioning plant and fresh air will be delivered to the supply air terminal device through a centrally positioned sound insulated conduit and, subsequent to be turned through 180° in the vicinity of a throttle valve in the region of the upper part of the conduit, will be caused to depart from the device through holes or slots provided in one or more sides of the device, without increasing in pressure in said device.
  • This method of supplying air to the supply air terminal devices and the surrounding area will effectively dampen noise and will also ensure that the air leaving a supply aterminal device has a low impulse, i.e. creates prac­tically no draughts, not even in the immediate vicinity of the device.
  • a supply air terminal device of the aforedescribed kind can be positioned adjacent working positions in the room or location served by the system, e.g. adjacent a desk.
  • the supply air devices may be given a form such that they themselves form part of the actual work place, i.e. in practice have the same height as a desk and form a work surface or some other surface contiguous with a desk surface.
  • these cables are taken up from the floor cavity through a space in respective supply air terminal devices provided especially for this purpose.
  • the fan of the air conditioning plant is preferably located in or in the immediate vicinity of the floor cavity. This will enable the treated air to be supplied effectively to the floor cavity without creating a drop in air pressure as a result of further deflection air flow.
  • the floor cavity concerned is preferably covered with flooring tiles, slabs or the like in accordance with a module system to which the outlet part of the air-­conditioning unit and the connecting parts of the supply air terminal device are also adapted.
  • the outlet part of said unit may be given an area which corresponds in cross-section to the area of one or a certain number of flooring tiles, which also applies to the connecting bases or plinths of the air supply terminal devices.
  • the invention also relates to an air supply terminal device which can be positioned adjacent to or on the floor surface of a room or location, the main charac­terising features of said device being set forth in the characterising clause of claim 6.
  • Figure 1 shows part of a floor, or story, of an office block which includes a number of offices partitioned by walls 1. Located centrally on the illustrated floor of the office block is an air conditioning unit 2, which has a vertical extension of about 2 meters from floor surface level.
  • Circulated air is introduced into the unit 2, through the top thereof, and is there filtered and cooled, before being passed to a cavity 3 beneath the floor surface 4 of the room or location.
  • the floor surface 4 comprises a multiple of square flooring tiles 5.
  • the area of each flooring tile corresponds to the cross-sectional area of the unit 2, which means that only one tile is removed in the place where the unit 2 is to stand.
  • the flooring tiles may optionally be divided into sec­tions, one or more of which will correspond to the cross-sectional area of the base parts or plinths on which the air supply terminal devices used are sup­ported, these devices being generally referenced 10 in the drawings.
  • An inventive air supply terminal device will be described in more detail hereinafter.
  • the arrows 7 drawn in the floor cavity indicate that the conditioned air leaving the unit 2 will spread through­out the cavity 3.
  • fresh air is also delivered to the floor cavity 3, through a fresh air conduit 8 which is perforated with holes 9 and located adjacent the unit 2, such that air leaving the unit will be mixed with the fresh air in the conduit 8.
  • the cut-away area in Figure 2 illustrates the approximate size of the mixing zone thus achieved.
  • the illustrated terminal device 10 has a main body part 11, a base or plinth 12 and a top cover 13, which may be located on a level with the top of the desk 20 and therewith itself serve as the desk top or desk working surface.
  • the device 10 also includes a centrally positioned air supply channel 14, which is lined with sound absorbing material and which widens out in the region of the base 12, to form a lower connecting part 14a.
  • the device 10 further comprises two side panels 16, which are perforated with outlet holes 15, and a front panel 17, which is also perforated with outlet holes.
  • the outlet holes 15 are arranged in vertical columns and outwardly of each such column there is found a ver­tically extending plate 18 with inwardly bent end parts. This arrangement will ensure that the air is delivered to the surroundings gently, at a low impulse and that the air will be mixed well with the ambient room air.
  • a throttle valve 21 Arranged in the device 10 is a throttle valve 21 which comprises two curved parts 21a and 21b and which is controlled by a temperature sensor 22 in a manner to regulate the quantity of air delivered to the surround­ings.
  • a temperature sensor 22 When the prevailing room temperature is low, the setting of the valve will be adjusted accordingly, so as to deliver a minimum air flow.
  • valve parts 21a and 21b deflect the air entering from the channel 14 through 180°.
  • the inner, upper corners of the air supply terminal device are curved commensurately, so as achieve deflection of the air flow substantially in the absence of turbulence.
  • valve parts 21a and 21b guide the major part of the incoming air flow towards the two opposing vertical side panels 16, whereas a minor part of the air flow departs through the holes 15 located in the front panel 17.
  • the fourth side panel 23 of the box-like air supply terminal device consists in a vertically displaceable wall element which defines a space 24 in the device. This space is intended for the accommodation of tele­phone cables and electric cables 24 extending to the work place concerned. Such a cable arrangement 24 drawn through the floor cavity 3 is also shown in Figure 1.
  • the space 24 in the device 10 is also defined on its inwardly located side by a partition wall 25 adjacent the inlet channel 14.
  • the main part of the device 10 is moveable vertically in relation to the plinth or base 12. This will enable the device to be given a desired vertical extension within certain limits, e.g. so that the top surface or panel 13 of the device will coincide with the level of the work surface of the desk 20.
  • the main part of the device can be detachably secured to the base 12 with the aid of pins 27 which pass through holes provided in said base.
  • a nozzle 30 capable of distributing the supply air uniformly along the surfaces of the device is fitted into each of the holes 15.
  • the reference numeral 31 identifies an electric heater for heating the supply air, when necessary or so de­sired, e.g. during the winter months.
  • the aforesaid valve 21 will function in reverse, i.e. the valve will be opened wider at lower temp­eratures.
  • the air conditioning unit 2 illustrated in Figure 3 is fitted with an air filter 35 which is effective in filtering the supplied circulated air, the filtered air subsequently being treated in a heating/cooling battery 36.
  • a variable speed fan 37 is effective in moving the air to the cavity 3 beneath the floor surface 4.
  • the pressure prevailing in the floor cavity 3 is sensed by means of a sensor, not shown.
  • a control device which, in response thereto, increases the speed of the fan so as to maintain the pressure at a predetermined level.
  • the supply air ter­minal devices will also deliver air at a level beneath 1 meter, whereas the circulating air is supplied to the unit 2 at a level which is approximately twice this height above floor level, i.e. at a level as high as about 2 meters.
  • Contaminated air will gather in a region slightly beneath the ceiling of the room and is vented therefrom through an exhaust air terminal device 38.
  • the system assumes that the various locations or rooms on the floor or story of the building served by the system communicate with each other, e.g. through appropriate gratings fitted above respective doors.
  • the high quality of the air achieved when practising the inventive method is due to the fact that the circulated air is introduced into the unit 2 at a level which is located in the occupied zone of a room or location, whereas contaminated air which collects immediately beneath the ceiling of said room is discharged through exhaust air terminal devices located on a corresponding level.
  • the pressure of the air in the floor cavity 3 may be from 20 to 30 Pa.
  • An excessively high pressure in said cavity may create sealing problems in the over­lying floor surface. It may also result in problematic noise levels.
  • the illustrated configuration of the supply air terminal device provides an advantageous solution to the type of problem described in the foregoing.

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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)
  • Central Air Conditioning (AREA)
EP19890850115 1988-04-11 1989-04-10 Verfahren und Vorrichtung für die Zufuhr von klimatisierter Luft Expired - Lifetime EP0337972B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8801334 1988-04-11
SE8801334A SE467019B (sv) 1988-04-11 1988-04-11 Saett och tilluftsdon vid deplacerande ventilation

Publications (3)

Publication Number Publication Date
EP0337972A2 true EP0337972A2 (de) 1989-10-18
EP0337972A3 EP0337972A3 (en) 1990-08-29
EP0337972B1 EP0337972B1 (de) 1994-02-02

Family

ID=20371974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890850115 Expired - Lifetime EP0337972B1 (de) 1988-04-11 1989-04-10 Verfahren und Vorrichtung für die Zufuhr von klimatisierter Luft

Country Status (3)

Country Link
EP (1) EP0337972B1 (de)
DE (1) DE68912813T2 (de)
SE (1) SE467019B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690511A1 (fr) * 1992-04-24 1993-10-29 Levavasseur Guy Dispositif d'apport d'air respirable, notamment pour espaces confinés.
WO1997034113A1 (en) * 1996-03-11 1997-09-18 Leif Lind A box- or screen-like supply air terminal device and a nozzle module or nozzle unit therefor
CN108592186A (zh) * 2018-04-12 2018-09-28 中国建筑股份有限公司 大空间的微环境品质控制系统
CN111225547A (zh) * 2020-03-02 2020-06-02 广东美的暖通设备有限公司 机房空调系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407448A1 (de) * 1974-02-16 1975-08-28 Kessler & Luch Kg Anlage fuer die raumklimatisierung und im boden verlegten zuluftkanaelen
DE2754699A1 (de) * 1976-12-09 1978-06-15 Leif Ingemar Lind Schirm zur verbesserung der umgebung eines arbeitsortes mit mehreren arbeitsbereichen
DE2938702A1 (de) * 1979-09-25 1981-04-09 LTG Luftechnische GmbH, 7000 Stuttgart Klimaanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407448A1 (de) * 1974-02-16 1975-08-28 Kessler & Luch Kg Anlage fuer die raumklimatisierung und im boden verlegten zuluftkanaelen
DE2754699A1 (de) * 1976-12-09 1978-06-15 Leif Ingemar Lind Schirm zur verbesserung der umgebung eines arbeitsortes mit mehreren arbeitsbereichen
DE2938702A1 (de) * 1979-09-25 1981-04-09 LTG Luftechnische GmbH, 7000 Stuttgart Klimaanlage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690511A1 (fr) * 1992-04-24 1993-10-29 Levavasseur Guy Dispositif d'apport d'air respirable, notamment pour espaces confinés.
WO1997034113A1 (en) * 1996-03-11 1997-09-18 Leif Lind A box- or screen-like supply air terminal device and a nozzle module or nozzle unit therefor
US6135877A (en) * 1996-03-11 2000-10-24 Lind; Leif Box- or screen-like supply air terminal device and a nozzle module or nozzle unit therefor
CN108592186A (zh) * 2018-04-12 2018-09-28 中国建筑股份有限公司 大空间的微环境品质控制系统
CN111225547A (zh) * 2020-03-02 2020-06-02 广东美的暖通设备有限公司 机房空调系统

Also Published As

Publication number Publication date
DE68912813D1 (de) 1994-03-17
SE8801334L (sv) 1989-10-12
EP0337972B1 (de) 1994-02-02
DE68912813T2 (de) 1994-05-19
SE467019B (sv) 1992-05-11
SE8801334D0 (sv) 1988-04-11
EP0337972A3 (en) 1990-08-29

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