EP0982550A2 - Belüftungseinrichtung mit Kühlung und/oder Heizung - Google Patents

Belüftungseinrichtung mit Kühlung und/oder Heizung Download PDF

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Publication number
EP0982550A2
EP0982550A2 EP99850129A EP99850129A EP0982550A2 EP 0982550 A2 EP0982550 A2 EP 0982550A2 EP 99850129 A EP99850129 A EP 99850129A EP 99850129 A EP99850129 A EP 99850129A EP 0982550 A2 EP0982550 A2 EP 0982550A2
Authority
EP
European Patent Office
Prior art keywords
air
velocity device
room
high velocity
low velocity
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
EP99850129A
Other languages
English (en)
French (fr)
Other versions
EP0982550A3 (de
EP0982550B1 (de
Inventor
Anders Svensson
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.)
Stifab Farex AB
Original Assignee
Stifab Farex AB
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 Stifab Farex AB filed Critical Stifab Farex AB
Publication of EP0982550A2 publication Critical patent/EP0982550A2/de
Publication of EP0982550A3 publication Critical patent/EP0982550A3/de
Application granted granted Critical
Publication of EP0982550B1 publication Critical patent/EP0982550B1/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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
    • 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

Definitions

  • the present invention relates to ventilation apparatus having a room-air cooling and/or heating function and including a high velocity device for mixed ventilation low velocity device for displaced-ventilation and positioned beneath said high velocity device, and valve means for controlling the air flow incoming to the high velocity device or the low velocity device.
  • a low velocity device has a low injection velocity
  • the warm air will only displace upwards the air located in the immediate vicinity of the device, instead of spreading the air over the whole of the room, as is desired.
  • This problem is solved with the known apparatus, by combining the low velocity device with a high velocity device the principle function of which is to alone supply air at a high velocity, so as to obtain more uniform heating of the room by mixed ventilation, and together with the low velocity device to supply air at room temperature in another mode when not wishing to heat the room.
  • a switching device is provided between said devices (possibly outside said devices) and functions to switch between mixed ventilation and displaced ventilation, or at least to adjust the ratio there between.
  • a ventilation system that includes a heating and a cooling function requires the input of a certain amount of thermal energy together with the air. It is of interest to limit the air flows so as, in turn, to limit the energy required to distribute the air in a total ventilation system. Thus, when desiring to reduce the air flows through such systems with the intention of saving air distribution energy, it is necessary to increase the temperature difference between supply air and room air to a corresponding extent, in order to deliver the same amount of energy to the system.
  • the inventive ventilation system includes an ejector part which is adapted to receive warm or cold supply air as primary air and which includes means for sucking into the ejector part room air as secondary air through the medium of the primary air, such that a mixture of primary and secondary air exiting from the ejector part will be delivered as supply air to the high velocity device or to the low velocity device, depending on the setting of the valve means.
  • the main components of the inventive apparatus i.e. the low velocity device, the high velocity device and the ejector part, may be located in mutually separate positions. which may be preferred and even necessary in the case of some localities, although it is preferred in the majority of cases for reasons of space or other practical reasons, primarily flow technical reasons, to combine the low velocity device, the high velocity device and the ejector part to form a single unit, with the ejector part normally placed uppermost and the low velocity device placed lowermost, wherewith the valve means is placed between the high velocity and low velocity devices.
  • the reason for this is because the ejector effect decreases when the flow resistance in the system is excessively high, and consequently it is endeavoured to position the individual components of the apparatus so as to obtain the least possible resistance to flow therebetween and within themselves.
  • the high velocity device is conveniently provided with nozzles for distributing the supply air/room-air mixture to the room.
  • a Stifab nozzle according to Swedish design registration No. 55598 is a suitable nozzle in this respect.
  • the ejector part is preferably designed and configured so that the ratio between primary and secondary air will lie in the range of 0.5-1.0, preferably about 1.0.
  • Figures 1 and 2 illustrate apparatus that include mutually separated devices
  • Figure 1 being a front view
  • Figure 2 a side view of said apparatus
  • Figures 3 and 4 illustrate an apparatus in which all component parts are combined in one unit
  • Figure 3 is a front view
  • Figure 4 is a sectioned view taken through the centre of the apparatus and illustrating the operating principles of the apparatus.
  • Figure 1 illustrates an inventive ventilation apparatus 10 that includes a freestanding high velocity device 11 arranged on the left of the Figure. and a freestanding low velocity device 12 arranged cn the right of the Figure.
  • An ejector part 13 that includes a supply air inlet 14 is positioned above the devices 11, 12. At least those parts or that part of the ejector part 13 that shall face towards the room have/has perforated walls 15 that allow room air to pass from the room and into the interior of the ejector part 13.
  • the devices 11, 12 and the ejector part 13 are interconnected by means of a three-path air duct 25 in which a valve means 20 is arranged.
  • the valve means 20 is shown in a position 20A in which the duct 25 is closed for passage of air from the ejector part 13 to the low velocity device 12.
  • the duct 25 is closed for passage of air from the ejector part 13 to the high velocity device 11, which is provided with nozzles 16 for ejecting air mixture into the room, at least on those parts or that part thereof that shall face towards the room.
  • a low velocity device 12 is placed to the right of the high velocity device 11. Those parts or that part of the low velocity device 12 that shall face towards the room include or includes perforated walls 15 that allow air mixture to flow from the device 12 into the room.
  • the side view of Figure 2 also shows, in section, an ejector device arranged in the ejector part 13.
  • the ejector device includes an inlet part 17 that has an upper, first part of constant cross-section for the inflow of primary air, a lower, second part of decreasing cross-section for increasing the velocity of primary air. an air mixture outlet part 18, and a room air suction gap 19 positioned therebetween.
  • the duct 25 includes between the ejector part 13 and the high velocity device 11 and the low velocity device 12 a valve means 20 which causes the air mixture exiting from the ejector part 13 to pass either to the high velocity device 11 or to the low velocity device 12.
  • Figure 3 illustrates an inventive ventilation apparatus 10 constructed as a single unit and including a high velocity device 11 which is placed above and connected directly to a low velocity device 12.
  • a high velocity device 11 Arranged above the high velocity device 11 is an ejector part 13 that includes a supply air inlet 14. At least those parts or that part of the ejector part 13 that shall face towards the room have/has perforated walls 15 which permit room air to pass from the room and into the interior of the ejector part 13.
  • a high velocity device 11 Positioned beneath the ejector part 13 is a high velocity device 11 of which at least those parts or that part that shall face towards the room are/is provided with nozzles 16 for ejecting air mixture into the room.
  • the low velocity device 12 is positioned beneath the high velocity device 11. At least those parts or that part of the low velocity device 12 that shall face towards the room are/is provided with perforated walls that allow air mixture to pass from the device 12 into the room.
  • the side view of Figure 4 also shows, in section, an ejector device 14 provided in the ejector part 13 and comprising an inlet part 17 that includes an upper, first part of constant cross-section for the inflow of primary air, a lower, second part of decreasing cross-section for increasing the velocity of the primary air, an air mixture outlet part 18, and a room air suction gap 19 therebetween.
  • a valve means 20 Arranged between the high velocity device 11 and the low velocity device 12 is a valve means 20 which, when closed, prevents air mixture exiting from the ejector part 13 from flowing down to the low velocity device 12, while when open allows full passage of this mixture to the low velocity device 12.
  • warm or cold supply air 21 is delivered to the ejector inlet 17 and a subpressure is generated in the suction gap 19 as a result of the increase in air velocity, so that room air 21 will be drawn by suction in through the perforated walls 15 and into the gap 19, so as to mix with the primary air 21 in the ejector outlet 18.
  • the air mixture will be guided to and into the high velocity device 11 via the duct 25 when the valve means 20 is in the illustrated position 20A, and to and into the low velocity device 12 when the valve means 20 is in its reverse position 20B.
  • valve means 20 When warm air or at least air vhich is warmer than the room air. is supplied as primary air to the ejector part 13, the valve means 20 will be in position 20A, said valve means being set to this position by automatic means which functions to detect or sense the temperatures in the system, such as in the manner described in EP-B 0 521 989, or in some other way, wherein the warmer air mixture will be delivered to the room solely through the high velocity device 11, which delivers said air through the nozzles 16 during mixed ventilation. Because the warm supply air (primary air) is diluted with room air, the difference in temperature between the supply air and the room air will decrease proportionally with the degree of said dilution and the ventilation drawbacks caused by temperature differences between supply air and room air will thus be markedly reduced.
  • valve means 20 When cold air or at least air which is colder than the room air is supplied as primary air to the ejector part 13, the valve means 20 will be in position 20B. With the valve in this position, the colder air mixture will pass directly from the ejector part 13 through the duct 25 and into the low velocity device 12, from where it exists into the room through the perforated walls 15 of said device 12.
  • valve means 20 When the apparatus used has the combined, unit form of Figures 3 and 4, the valve means 20 will be closed in the first case in which warm air is supplied, wherewith the warm air mixture will be delivered to the room solely through the nozzles 16 on the high velocity device 11, as indicated by arrows 23. In the second case in which cold air is supplied, the valve means 20 will be open and the major part of the colder air mixture will flow from the ejector part 13, for reasons of a flow technical nature, and pass down through the high velocity device 11 and into the low velocity device 12. from where it exits into the room as illustrated by arrows 25. A minor part of the cold air mixture may flow out into the room through the nozzles 16 in the high velocity device 11, although this minor air flow will have no negative effect on the ventilation of the room nor present any disadvantage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Duct Arrangements (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Catching Or Destruction (AREA)
EP99850129A 1998-08-24 1999-08-23 Belüftungseinrichtung mit Kühlung und/oder Heizung Expired - Lifetime EP0982550B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9802803 1998-08-24
SE9802803A SE521658C2 (sv) 1998-08-24 1998-08-24 Ventilationsanordning med kylnings-och/eller uppvärmningsfunktion innefattande höghastighetsdon och låghastighetsdon

Publications (3)

Publication Number Publication Date
EP0982550A2 true EP0982550A2 (de) 2000-03-01
EP0982550A3 EP0982550A3 (de) 2000-07-05
EP0982550B1 EP0982550B1 (de) 2003-11-19

Family

ID=20412315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99850129A Expired - Lifetime EP0982550B1 (de) 1998-08-24 1999-08-23 Belüftungseinrichtung mit Kühlung und/oder Heizung

Country Status (5)

Country Link
EP (1) EP0982550B1 (de)
AT (1) ATE254744T1 (de)
DE (1) DE69912903D1 (de)
NO (2) NO318541B1 (de)
SE (1) SE521658C2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1162411A1 (de) * 2000-06-08 2001-12-12 Pluggit International N.V. Luftwärme/Klimagerät
DE10157115C1 (de) * 2001-11-21 2003-04-30 Emco Klima Gmbh & Co Kg Luftauslaß zur Kühlung oder Erwärmung von Räumen
EP2682688A1 (de) * 2012-07-06 2014-01-08 LK Metallwaren GmbH Mischluftverteiler für warmluftheizungen
WO2019229044A1 (de) * 2018-05-30 2019-12-05 Krantz Gmbh Verdrängungsluftauslass

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919929A (en) * 1973-11-21 1975-11-18 United Sheet Metal Company Multiple-control air distribution outlet device
US3937132A (en) * 1973-06-19 1976-02-10 Luwa Ag Air outlet apparatus
DE3044080A1 (de) * 1980-11-24 1982-09-09 Schmidt Reuter Ingenieurgesellschaft mbH & Co KG, 5000 Köln Raumlufttechnische anlage
DE3913306A1 (de) * 1989-04-22 1990-10-25 Gravivent Raumlufttechnik Gmbh Vorrichtung zum klimatisieren von raeumen
EP0521989A1 (de) * 1990-03-29 1993-01-13 Mats Kronfaelt Lüftungsverfahren und -anlage.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937132A (en) * 1973-06-19 1976-02-10 Luwa Ag Air outlet apparatus
US3919929A (en) * 1973-11-21 1975-11-18 United Sheet Metal Company Multiple-control air distribution outlet device
DE3044080A1 (de) * 1980-11-24 1982-09-09 Schmidt Reuter Ingenieurgesellschaft mbH & Co KG, 5000 Köln Raumlufttechnische anlage
DE3913306A1 (de) * 1989-04-22 1990-10-25 Gravivent Raumlufttechnik Gmbh Vorrichtung zum klimatisieren von raeumen
EP0521989A1 (de) * 1990-03-29 1993-01-13 Mats Kronfaelt Lüftungsverfahren und -anlage.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1162411A1 (de) * 2000-06-08 2001-12-12 Pluggit International N.V. Luftwärme/Klimagerät
DE10157115C1 (de) * 2001-11-21 2003-04-30 Emco Klima Gmbh & Co Kg Luftauslaß zur Kühlung oder Erwärmung von Räumen
EP2682688A1 (de) * 2012-07-06 2014-01-08 LK Metallwaren GmbH Mischluftverteiler für warmluftheizungen
WO2019229044A1 (de) * 2018-05-30 2019-12-05 Krantz Gmbh Verdrängungsluftauslass
JP2021523338A (ja) * 2018-05-30 2021-09-02 クランツ ゲー・エム・ベー・ハーＫｒａｎｔｚ ＧｍｂＨ 置換空気流出部

Also Published As

Publication number Publication date
NO994063D0 (no) 1999-08-23
NO318541B1 (no) 2005-04-11
EP0982550A3 (de) 2000-07-05
NO994032L (no) 2000-02-25
ATE254744T1 (de) 2003-12-15
EP0982550B1 (de) 2003-11-19
NO994032D0 (no) 1999-08-20
SE9802803D0 (sv) 1998-08-24
DE69912903D1 (de) 2003-12-24
SE9802803L (sv) 2000-02-25
SE521658C2 (sv) 2003-11-25

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