EP0797054A2 - Dispositif de refroidissement - Google Patents

Dispositif de refroidissement Download PDF

Info

Publication number
EP0797054A2
EP0797054A2 EP97104081A EP97104081A EP0797054A2 EP 0797054 A2 EP0797054 A2 EP 0797054A2 EP 97104081 A EP97104081 A EP 97104081A EP 97104081 A EP97104081 A EP 97104081A EP 0797054 A2 EP0797054 A2 EP 0797054A2
Authority
EP
European Patent Office
Prior art keywords
cooling device
air
air flow
cooling
heat exchanger
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
EP97104081A
Other languages
German (de)
English (en)
Other versions
EP0797054B1 (fr
EP0797054A3 (fr
Inventor
Fritz Dipl.-Ing. Nüssle (FH)
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.)
Thermosoft Klimatechnik GmbH
Original Assignee
Thermosoft Klimatechnik GmbH
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 Thermosoft Klimatechnik GmbH filed Critical Thermosoft Klimatechnik GmbH
Publication of EP0797054A2 publication Critical patent/EP0797054A2/fr
Publication of EP0797054A3 publication Critical patent/EP0797054A3/fr
Application granted granted Critical
Publication of EP0797054B1 publication Critical patent/EP0797054B1/fr
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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
    • F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside air

Definitions

  • the invention relates to a cooling device, in particular for cooling room air.
  • cooling of the room air to a temperature that is perceived as pleasant by the people who are in the respective room is required.
  • the heat generated by such rooms results on the one hand from an internal heat generated by electrical devices, EDP equipment, lighting, but also by the people in the room or the other external heat, such as solar radiation.
  • Cooling devices are known for cooling room air, in which air is directed via a heat exchanger through which coolant flows and is conducted into the room to be cooled.
  • the invention has for its object to provide a cooling device of compact design with improved heat exchange.
  • the cooling device should also be easy to install subsequently.
  • a cooling device in particular for indoor air, with a first cooling chamber and with a second cooling chamber, which are separated from one another by a partition wall in such a way that an air flow to be cooled flows through them in succession, which is blown by a blower through a fan Cooling chambers connecting, the air flow conducting air flow housing is promoted and with a heat exchanger which extends over the first and the second cooling chamber, wherein the air flow to be cooled flows through the heat exchanger in countercurrent.
  • the air to be cooled is thus passed twice over the heat exchanger through which the coolant flows, namely in the counterflow principle.
  • the air is first cooled at a first section of the heat exchanger downstream of the coolant flow, which is arranged in a first cooling chamber, and is then passed from the first cooling chamber into a second cooling chamber, where a second section of the heat exchanger is arranged which is upstream and is therefore cooler than the first section.
  • the air is cooled further in this second cooling chamber before it is returned to the room.
  • two-stage cooling of the air only one heat exchanger is required according to the invention. This allows a compact design of the cooling device according to the invention. Due to the double flow around the heat exchanger in the counterflow principle, according to the invention there is also a particularly effective heat exchange.
  • the fan is arranged in the air flow housing.
  • the air to be cooled is sucked in by the fan through the first cooling chamber and through the air flow housing into the second Cooling chamber forwarded to be directed from there back into the room to be cooled.
  • the air flow housing advantageously has an essentially semi-cylindrical shape. This enables the air to be transported in a streamlined manner.
  • the air flow housing has sound-absorbing means in a further embodiment of the invention.
  • This can be a sound-absorbing perforation and / or a sound-absorbing casing.
  • the blower is a cross-flow blower.
  • At least one air guide element is provided at the air inlet and outlet openings of the cooling device.
  • the air flow can be directed through this air guiding element in such a way that a draft-free room cooling is ensured.
  • the at least one air guiding element is advantageously a lamellar grille.
  • the external dimensions of the cooling device are adapted to the grid dimension of a ceiling plate for a suspended ceiling.
  • the single figure shows a cooling device according to the invention in a schematic cross-sectional illustration.
  • the cooling device 1 comprises a first cooling chamber 10, a second cooling chamber 20 and a coolant through which heat exchanger 30.
  • the first cooling chamber 10 and the second cooling chamber 20 are arranged adjacent and adjacent to one another, but separated from one another by a partition wall 12.
  • the heat exchanger 30 is arranged such that it extends through the partition 12 through both cooling chambers 10, 20, being arranged with a first section 31 in the first cooling chamber 10 and with a second section 32 in the second cooling chamber 20.
  • the heat exchanger 30 is a finned heat exchanger with a meandering coolant tube 34.
  • the heat exchanger 30 is arranged such that the flow of coolant in the coolant tube 34 (illustrated by the arrow F) from the second cooling chamber 20 to the first cooling chamber 10 runs there. This means that the second section 32 of the heat exchanger 30 in the second cooling chamber 20 is cooler than the first section 31 in the first cooling chamber 10.
  • the two cooling chambers 10, 20 each have an air inlet opening 11, 21 and an air outlet opening 13, 23, which is arranged parallel to the expansion of the heat exchanger 30 such that the air flow path in the cooling chambers 10, 20 is perpendicular to the surface of the heat exchanger 30.
  • An air flow housing 60 is arranged above the first and second cooling chambers 10, 20 and has an essentially semi-cylindrical shape.
  • the outlet opening 13 of the first cooling chamber 10 is connected to the inlet opening 21 of the second cooling chamber 20 by the air flow housing 60.
  • a cross-flow fan 50 is arranged in the air flow housing 60 in the air flow path between the two cooling chambers 10, 20, through which air is sucked in through the first cooling chamber 10, blown through the air flow housing 60 to the second cooling chamber 20 and expelled through the outlet opening 23 of the second cooling chamber 20 .
  • the outside of the air flow housing 60 is provided with an insulation layer 70.
  • the cooling device 1 according to the invention is integrated in a ceiling.
  • the cooling device 1 according to the invention is used by means of mounting elements 82, 83 on a ceiling plate 80, shown in sections, in such a way that it is connected to the inlet opening 11 of the first cooling chamber 10 and the Outlet opening 23 of the second cooling chamber 20 points to a space 90 to be cooled.
  • the cooling device 1 On the room side, the cooling device 1 has a lamella grid 40 with a first section 41 and a second section 42, the first section 41 of the lamella grid 40 being assigned to the first cooling chamber 10 and the second section 42 to the second cooling chamber 20.
  • the air flow on the room side can be directed through the fins of the finned grille 40.
  • the cooling device 1 During operation of the cooling device 1 according to the invention, air is drawn from the space 90 through the first section 41 of the lamellar grille 40 and the air inlet opening 11 into the first cooling chamber 10 by rotating the cross-flow fan 50 in the direction of the arrow R (arrows L1).
  • the intake air sweeps over the first section 31 of the heat exchanger 30 and is thus cooled.
  • the air is then conveyed in the direction of arrows L2 and L3 by the crossflow fan 50 through the airflow housing 60 and blown into the second cooling chamber 20. There the air sweeps over the second section 32 of the heat exchanger 30 and is further cooled there. As described above, the air is thus passed twice over the heat exchanger 30 in the counterflow principle.
  • the air cooled according to the invention is blown back into the space 90 through the air outlet opening 23 and the second section 42 of the louvre grille 40.
  • the fins of the lamellar grid 40 are set so that the air emerging in the direction of arrows L4 is directed away from the inlet opening 11 of the first cooling chamber 10, thereby avoiding that this air is immediately sucked back into the cooling device.
  • the lamellae of the lamellar grid 40 are set such that the space 90 is cooled as draft-free as possible.
  • the cross-flow fan 50 can be operated in a periodic alternation, the periods of the opposite-direction operation advantageously being kept shorter than that in order to maintain the two-stage cooling according to the invention Periods of normal operation described above.
  • the cooling device according to the invention described above is characterized by a compact design and can be used with or without a suspended false ceiling.
  • the cooling device according to the invention can be switched on and off individually. Its performance can also be adapted to the temperature requirements in the room to be cooled by regulating the speed or controlling a control valve.
  • the heat exchanger through which the coolant flows is used in the countercurrent principle. Since the air flows through the heat exchanger twice, the heat exchange, i.e. the cooling effect is particularly effective.
  • tandem training has proven to be advantageous, in which two cooling devices according to the invention are arranged in mirror image, ie with air outlets pointing away from one another.
  • the size of this tandem arrangement essentially corresponds to the dimensions of a standard ceiling tile, so that when removing a false ceiling instead of a ceiling tile element such a tandem cooling device can be used. If the size of the standard ceiling plate is 625x1250 mm, a dimension of 300x1200 mm is selected for the cooling device according to the invention, which corresponds to a dimension of 600x1200 mm for the tandem arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
EP97104081A 1996-03-18 1997-03-11 Dispositif de refroidissement Expired - Lifetime EP0797054B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19610518 1996-03-18
DE19610518A DE19610518C1 (de) 1996-03-18 1996-03-18 Kühlvorrichtung

Publications (3)

Publication Number Publication Date
EP0797054A2 true EP0797054A2 (fr) 1997-09-24
EP0797054A3 EP0797054A3 (fr) 1998-03-25
EP0797054B1 EP0797054B1 (fr) 2003-01-22

Family

ID=7788581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104081A Expired - Lifetime EP0797054B1 (fr) 1996-03-18 1997-03-11 Dispositif de refroidissement

Country Status (3)

Country Link
EP (1) EP0797054B1 (fr)
AT (1) ATE231602T1 (fr)
DE (2) DE19610518C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016203814A1 (fr) * 2015-06-18 2016-12-22 三菱電機株式会社 Appareil de climatisation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008255A (en) * 1933-11-16 1935-07-16 Larkin Refrigerating Corp Counter flow air conditioner
US2481625A (en) * 1947-08-29 1949-09-13 Thomas H Sarchet Air-conditioning unit
DE8816827U1 (de) * 1988-08-04 1990-10-18 KÜBA Kühlerfabrik Heinrich W. Schmitz GmbH, 8021 Baierbrunn Luftkühler mit Leitgitter
DE4016563A1 (de) * 1990-05-23 1991-11-28 Schako Metallwarenfabrik Auslass
JPH05322207A (ja) * 1992-05-21 1993-12-07 Toshiba Corp 天井取付け形空気調和機
SE9301237L (sv) * 1993-04-14 1994-10-15 Farex As Anordning för kylning av rumsluft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016203814A1 (fr) * 2015-06-18 2016-12-22 三菱電機株式会社 Appareil de climatisation
JPWO2016203814A1 (ja) * 2015-06-18 2017-09-28 三菱電機株式会社 空調装置

Also Published As

Publication number Publication date
DE19610518C1 (de) 1997-06-26
EP0797054B1 (fr) 2003-01-22
EP0797054A3 (fr) 1998-03-25
DE59709169D1 (de) 2003-02-27
ATE231602T1 (de) 2003-02-15

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