EP2639519B1 - Lüftungsgerät mit interner Heizung - Google Patents

Lüftungsgerät mit interner Heizung Download PDF

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Publication number
EP2639519B1
EP2639519B1 EP13154233.4A EP13154233A EP2639519B1 EP 2639519 B1 EP2639519 B1 EP 2639519B1 EP 13154233 A EP13154233 A EP 13154233A EP 2639519 B1 EP2639519 B1 EP 2639519B1
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EP
European Patent Office
Prior art keywords
ventilation device
housing
heat
heating means
exchanging
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.)
Active
Application number
EP13154233.4A
Other languages
English (en)
French (fr)
Other versions
EP2639519A1 (de
Inventor
Luc Louis Renson
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.)
Vero Duco NV
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Vero Duco NV
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Publication date
Application filed by Vero Duco NV filed Critical Vero Duco NV
Publication of EP2639519A1 publication Critical patent/EP2639519A1/de
Application granted granted Critical
Publication of EP2639519B1 publication Critical patent/EP2639519B1/de
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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
    • F24F7/00—Ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/002—Air heaters using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F2007/0025—Ventilation using vent ports in a wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F2007/004—Natural ventilation using convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/34—Heater, e.g. gas burner, electric air heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • F24H9/0063—Guiding means in air channels

Definitions

  • the invention relates to a passive ventilation device for use in a building, comprising a housing, a ventilation passage which extends through the housing between an inlet of the housing which is to be turned towards the exterior of the building and an outlet of the housing to be turned towards the interior of the building in order to provide an airflow between the inlet and the outlet, a flap for closing or opening the ventilation passage, as well as heating means incorporated in the housing, wherein the heating means are suspended from a thermally insulated support means and the heating means have heat-exchanging surfaces facing away from each other.
  • a passive ventilation device of this type is known from DE-U-20110569 .
  • This ventilation device is configured as a piece of pipe inside which several electric bulbs are suspended.
  • This piece of pipe may be configured to be thermally insulated, so that it does not heat up, or only to a limited degree.
  • a further passive ventilation device is known from DE-A-3419001 .
  • this known ventilation device On the side turned towards the interior of the building, this known ventilation device has a grate comprising grate openings via which the outside air can flow into the building.
  • a heating foil is attached to the inner surface of the grate. By applying an electrical voltage across said heating foil, the temperature of the foil and of the grate increases, as a result of which the air is heated before flowing into a building via the grate. This is intended to prevent draughts and/or cold air streams.
  • the heating foil covers a part of the grate openings, which adversely affects the ventilation capacity. If desired, openings can be made in the foil, but this is a difficult operation which also carries the risk that the foil is damaged to such a degree that it no longer functions well.
  • a further important drawback is that the grate itself also becomes hot. Since the grate is freely accessible from the space in the building, there is a risk that the user may burn himself when operating the ventilation device.
  • US-A-2011/0143643 discloses a ventilation port for a closable cooling device.
  • a heating system is provided with the aim of preventing the closure element from freezing onto said cooling device. Said heating system is fitted to a heat-conducting support, so that the heat can readily heat the flap and the flap seat of the closure element.
  • a passive ventilation device according to the preamble of claim 1 is known from DE 201 10 569 U1 . It is therefore an object of the invention to provide a ventilation device of the abovementioned type, wherein the air can be heated sufficiently, the flow rate in the ventilation passage can be maintained at the desired level and the risk of burning of the user is also prevented. This object is achieved in that the thermally insulated support means has a thermal conductivity which is lower than that of the housing.
  • the ventilation device can heat the incoming air before it reaches the space in question, without the temperature of the housing increasing significantly.
  • the thermally insulated suspension ensures that the relatively high temperatures which the heating means has to reach to effectively heat the air, do not impact on the housing. Thus, the problem of the user burning himself is eliminated.
  • thermally insulated support means may be configured in many different ways.
  • the thermally insulated support means has a thermal conduction (W.m -1 .K -1 , watt per metre Kelvin) which is lower than that of the housing, given otherwise identical circumstances.
  • the desired thermal insulation of the heating means with respect to the housing can be achieved in different ways.
  • Preference is given to an embodiment in which the heating means is supported in the housing by supports which are spaced apart in the longitudinal direction.
  • Such supports may be formed in many ways, depending on the internal configuration of the housing.
  • the supports comprise thermally insulated material which has a lower thermal conduction (W.m -1 .K -1 ) than metal, such as a plastic.
  • a thermal conduction at room temperature having a value of ⁇ 10 W.m -1 .K -1 , preferably ⁇ 1 W.m -1 .K -1 is mentioned.
  • the heating means furthermore preferably has two heat-exchanging surfaces facing away from each other. Due to the orientation of the heating means, the incoming air flows freely across both said surfaces in the transverse direction. Due to the spaced-apart supports, the air can flow both underneath and over the heating means, in such a way that it can be heated effectively. These heat-exchanging surfaces may run parallel to each other, but this is not obligatory.
  • the heating means may be configured in the form of a foil or sheet of electrically conductive material. Although the heating means may be flat, it does not have to be completely flat.
  • the heating means may have a partly or completely curved surface. The surface may also comprise small indentations or small projections.
  • an auxiliary profile may be provided from which the heating means is suspended. This auxiliary profile may itself also be heated by the heating means, and thus serve as a source of heat for the air flowing across it.
  • the ventilation device may have different shapes.
  • the ventilation device may have an elongate housing which defines a longitudinal direction x, a vertical direction z at right angles to the longitudinal direction and a transverse direction y at right angles to the longitudinal direction and vertical direction, which housing comprises mutually coupled profiles which are directed in the longitudinal direction.
  • the heating means is situated inside the profiles defining the housing.
  • the ventilation device may be circular in shape in order to be accommodated in a hole in a façade.
  • At least one heat-exchanging surface extends in the transverse direction in such a manner that the incoming air can readily flow across it. Such a surface can also extend obliquely with respect to the transverse direction. At least one heat-exchanging surface may be straight in cross section or curved in cross section.
  • the heat-exchanging means is situated in the housing.
  • the user can no longer come into contact with the heating means, so that the risk of injury from burning is prevented.
  • DE-A-4143036 discloses an active ventilation device provided with an electric ventilator and optionally an electric heater. No reference is made to a support for the heater.
  • the figure shows a variant of the ventilation device 1 which is constructed from a number of profiles which are coupled to one another, including the outer profile 5, the inner profile 8 and the connecting profiles 9, 10.
  • the inner profile 8 has a punched-out grate 11 and is attached to the top and bottom profiles 9, 10 by means of a click-action fastening 27, 28. Together, these profiles form the housing 12 of the ventilation device.
  • the ventilation passage 13 extends through this housing 12 between the inlet 15 and the outlet 16.
  • the ventilation passage 13 can be closed by means of the flap 14 which is rotatably suspended from the bottom inner profile 8.
  • the ventilation device 1 forms the connection between the exterior 17 and the interior 18 of the building and, when the flap 14 is open, supplies fresh outside air to the space which is situated in the interior of the building.
  • an unpleasant cold draught may be caused in said space.
  • an auxiliary profile 19 with a heating foil 20 is attached on the side of the housing 12 facing the outlet.
  • said heating foil can be heated electrically.
  • the outside air originating from the outlet 16 and flowing past the heating foil can then be heated to such a temperature that no unpleasant draught or cold air stream results in the space to be aerated.
  • the action of the ventilation device is not affected, or hardly at all, by the advantageous arrangement of the heating system parallel to the direction of flow.
  • the desired ventilation of the space situated behind it can also be ensured at relatively low outside temperatures.
  • the auxiliary assembly 26 consisting of the auxiliary profile 19 and the heating foil 20 is supported in the centre of the housing 12 by supports 31 which are spaced apart from each other. Said supports preferably consist of heat-resistant plastic and insulate the heating means 19, 20 with respect to the various profiles of the housing. Due to this arrangement of the heating means 19, 20, the air can flow along both surfaces thereof running in the transverse direction, as a result of which an optimum exchange of heat is effected. On the top surface, the air flows directly along the heating foil 20 itself. This heating foil 20 also heats the auxiliary profile 19, so that the air which flows along the underside is heated by said auxiliary profile. If desired, a second heating foil 20' may be arranged along the underside of the auxiliary profile in order to heat the air flowing along the underside.

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)
  • Central Heating Systems (AREA)
  • Building Environments (AREA)

Claims (15)

  1. Passive Lüftungsvorrichtung für die Verwendung in einem Gebäude, umfassende ein Gehäuse (12), einen Lüftungsdurchgang (13), der sich durch das Gehäuse (12) zwischen einem Einlass des Gehäuses (12), der in Richtung einer Außenseite (17) des Gebäudes zu richten ist, und einem Auslass (16) des Gehäuses, der in Richtung eines Inneren (18) des Gebäudes zu richten ist, erstreckt, um einen Luftstrom zwischen dem Einlass und dem Auslass zu liefern, eine Klappe (14) zum Schließen oder Öffnen des Lüftungsdurchgangs (13), als auch Heizmittel (20, 20'), die in das Gehäuse (12) eingebaut sind, wobei thermisch isolierte Tragemittel (31) vorgesehen sind, von denen die Heizmittel (20, 20') herabhängen, und die Heizmittel (20, 20') Wärmeaustauschflächen besitzen, die voneinander abgewandt sind, dadurch gekennzeichnet, dass die thermisch isolierten Tragemittel (31) eine thermische Leitfähigkeit besitzen, die niedriger als die des Gehäuses (12) ist.
  2. Lüftungsvorrichtung nach Anspruch 1, wobei die Heizmittel (20, 20') in dem Gehäuse (12) durch Tragelemente (31), die in der Längsrichtung beabstandet sind, getragen werden.
  3. Lüftungsvorrichtung nach Anspruch 2, wobei die Tragelemente (31) thermisch isoliertes Material enthalten, das ein niedrigeres Wärmeleitvermögen (W·m-1·K-1) als Metall besitzt, etwa Kunststoff.
  4. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei die Heizmittel in der Form einer Folie oder eines Blechs eines elektrisch leitenden Materials konfiguriert sind.
  5. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei ein Hilfsprofil (19) vorgesehen ist, von dem die Heizmittel (20) herabhängen.
  6. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, die ein langgestrecktes Gehäuse (12) umfasst, das eine Längsrichtung x, eine vertikale Richtung z im rechten Winkel zu der Längsrichtung und eine Querrichtung y im rechten Winkel zu der Längsrichtung und der vertikalen Richtung definiert, wobei das Gehäuse (12) gegenseitig gekoppelte Profile (5-11) umfasst, die in die Längsrichtung gerichtet sind, wobei sich die Heizmittel (20) in den Profilen befinden, die das Gehäuse (12) definieren.
  7. Lüftungsvorrichtung nach Anspruch 6, wobei sich mindestens eine Wärmeaustauschfläche (20, 20') quer in Bezug auf die Querrichtung erstreckt.
  8. Lüftungsvorrichtung nach Anspruch 7, wobei mindestens eine Wärmeaustauschfläche (20, 20') mit der Querrichtung zusammenfällt.
  9. Lüftungsvorrichtung nach einem der Ansprüche 6-8, wobei mindestens eine Wärmeaustauschfläche (20, 20') im Querschnitt gerade oder im Querschnitt gekrümmt ist.
  10. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei das Gehäuse aus Metall, etwa Aluminium, hergestellt ist.
  11. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei die thermische Leistung der Tragemittel einen Wert von ≤ als 10 W·m-1·K-1, vorzugsweise ≤ 1 W·m-1·K-1, besitzt.
  12. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei sich die Wärmeaustauschmittel (20, 20') in dem Gehäuse (12) befinden.
  13. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei mindestens eine Wärmeaustauschfläche (20, 20') in der Längssektion gerade ist.
  14. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei mindestens eine Wärmeaustauschfläche (20, 20') flach ist.
  15. Lüftungsvorrichtung nach einem der vorhergehenden Ansprüche, wobei Wärmeaustauschflächen (20, 20'), die voneinander abgewandt sind, zueinander parallel sind.
EP13154233.4A 2012-03-14 2013-02-06 Lüftungsgerät mit interner Heizung Active EP2639519B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2008487A NL2008487C2 (nl) 2012-03-14 2012-03-14 Ventilatie-inrichting met interne verwarming.

Publications (2)

Publication Number Publication Date
EP2639519A1 EP2639519A1 (de) 2013-09-18
EP2639519B1 true EP2639519B1 (de) 2018-01-31

Family

ID=47630217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13154233.4A Active EP2639519B1 (de) 2012-03-14 2013-02-06 Lüftungsgerät mit interner Heizung

Country Status (2)

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EP (1) EP2639519B1 (de)
NL (1) NL2008487C2 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB556037A (en) * 1941-08-29 1943-09-17 Hugh Stanley Ellis Improvements in or relating to ventilators
FR2288949A1 (fr) * 1974-10-24 1976-05-21 Eberspaecher J Sas d'amenee d'air frais pour l'aeration des locaux
DE3419001A1 (de) 1984-05-22 1985-11-28 Eberbach GmbH & Co, 6340 Dillenburg Belueftungseinrichtung mit luftvorwaermung
DE4143036A1 (de) * 1991-12-24 1993-07-01 Otto Feyer Belueftungseinrichtung fuer raeume
GB2304404A (en) * 1995-08-15 1997-03-19 Aztec Air vent with planar electric heating element
DE20110569U1 (de) * 2001-06-26 2001-09-06 Msr Service Gmbh Geräuschlose Belüftung von Räumen mit Frischluft durch "Thermische Lüftungsanlage"
US10145574B2 (en) * 2009-12-10 2018-12-04 Component Hardware Group, Inc. Vent port for a refrigerated cabinet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP2639519A1 (de) 2013-09-18
NL2008487C2 (nl) 2013-09-18

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