EP0964211A2 - Elektrisch beheizter Lüfter - Google Patents

Elektrisch beheizter Lüfter Download PDF

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Publication number
EP0964211A2
EP0964211A2 EP99201581A EP99201581A EP0964211A2 EP 0964211 A2 EP0964211 A2 EP 0964211A2 EP 99201581 A EP99201581 A EP 99201581A EP 99201581 A EP99201581 A EP 99201581A EP 0964211 A2 EP0964211 A2 EP 0964211A2
Authority
EP
European Patent Office
Prior art keywords
blades
fan
fan according
resistive
paths
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.)
Withdrawn
Application number
EP99201581A
Other languages
English (en)
French (fr)
Other versions
EP0964211A3 (de
Inventor
Mauro Pigozzi
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.)
Elettrocomponenti Srl
Original Assignee
Elettrocomponenti Srl
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 Elettrocomponenti Srl filed Critical Elettrocomponenti Srl
Publication of EP0964211A2 publication Critical patent/EP0964211A2/de
Publication of EP0964211A3 publication Critical patent/EP0964211A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems

Definitions

  • the present invention concerns a series of self-heating fans for hot air conveyors with rotating fan.
  • fans for the aforementioned uses serve limitedly to generate an air flow, whose heating is provided by appropriate heating elements (in particular with electric resistor) located upstream or downstream of the fan.
  • Object of the present invention is now to realise a series of fans that would autonomously heat themselves without the need of the use of separate heating elements upstream or downstream of the same ones in the air flow circuit.
  • such object is attained by means of a series of fans that have the common characteristics to have blades with resistive electric paths that are electrically supplied in order to generate by themselves heat for the heating of the conveyed air.
  • the blades of the fan wheel electrically supplied through the shaft of the fan wheel or by means of sliding electric contacts, heat themselves and, by substituting the usual heating elements, in turn irradiate heat which provides to the heating of the conveyed air flow.
  • the cost of the fans according to the invention will obviously be higher than the one of the traditional fans, but however lower then the sum of the costs of fan and of heating elements.
  • the axial fan of Figures 1 and 2 for example provided for a ceiling fan, comprises three equally distanced blades 1, that extend radially from a supporting central body 2, that is fixed to the external turning part 3 of an electric motor 4, whose internal fixed part 5 is supported by a rod 6 for example hung on a ceiling 7.
  • each blade 1 On one or both faces of each blade 1 an electric resistor 8, of metallic or chemical material, is applied by serigraphy and is connected in series with analogous resistors of the other two blades in order to form a single resistor whose ends are connected with as many electric conductors 9, 9', that terminate in turn with brushes 10, 10' that are fixed to the rotating part 3 of the motor 4.
  • the two brushes 10, 10' slide on respective slip rings 11, 11' that are fixed to the rod 6 and provided with an appropriate power supply.
  • the resistors 8 While the fan rotates thus creating an air flow, the resistors 8 are in this way electrically supplied and generate heat for the Joule effect thus heating the blades 1. These release in turn heat to the air flow, thus heating it.
  • the axial fan of Figures 3 and 4 is analogous to the one of Figures 1 and 2, of which it repeats most of the reference numbers, with the exception consisting in that each blade itself is made of an electrically conductive material, or it is entirely coated with such material, and it shows a central longitudinal slot 12 which divides it into two parts 13, 13', laid side by side, having external ends in common and internal ends that are separate and connected by means of wires 14, 14' to one and the other of the two electrical conductors 9, 9'.
  • the tangential fan of Figures 5-8 is made up of two terminal disks 15 of electrically insulating material, from one to the other of which a single strip 16 of electrically conductive flexible material extends, which engages in pairs of radial slots 17 of the disks 15 in order to form a circumferencial sequence of conductive blades extending from one disk to the other.
  • the electric supply for the blades 16 can be supplied in the way shown in Figures 9 and 10, that is hooking the opposite ends 21 and 22 of the strips 16 to the external face of one of the disks 15, in correspondence of conductive bumps 23 and 24 in turn electrically communicating with respective slip rings 25 and 26 that develop on the same aforementioned strip and on which respective brushes 27 and 28 connected with electric conductors 29 and 30 slide.
  • one of the slip rings can be developed along the perimeter back of the disk and be in electrical contact with a respective brush that is sliding on the same back.
  • centrifugal fan of Figures 13-15 comprises a rotating disk 31, that is fixed to a small supporting and control shaft 32 and from one face of which arched blades 33 extend perpendicularly on which respective resistors 34 in metallic or chemical material are made by serigraphy.
  • the electric resistors 34 are electrically supplied by means of an electric connection of respective ends 35 and 36 of the same resistors to respective slip rings 37 and 38 that are provided on the opposite face of the disk 31 and that are co-operating with respective brushes 39 and 40 connected with electrical conductors 41 and 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Drying Of Solid Materials (AREA)
  • Resistance Heating (AREA)
EP99201581A 1998-06-11 1999-05-19 Elektrisch beheizter Lüfter Withdrawn EP0964211A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI981324 ITMI981324A1 (it) 1998-06-11 1998-06-11 Serie di ventole autoriscaldanti per convogliatori di aria calda a ventola rotante
ITMI981324 1998-06-11

Publications (2)

Publication Number Publication Date
EP0964211A2 true EP0964211A2 (de) 1999-12-15
EP0964211A3 EP0964211A3 (de) 2002-06-26

Family

ID=11380218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99201581A Withdrawn EP0964211A3 (de) 1998-06-11 1999-05-19 Elektrisch beheizter Lüfter

Country Status (2)

Country Link
EP (1) EP0964211A3 (de)
IT (1) ITMI981324A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167776A3 (de) * 2000-06-29 2002-10-23 E.G.O. ELEKTRO-GERÄTEBAU GmbH Ventilator
US7043146B2 (en) 2003-12-15 2006-05-09 Solomon Semaza All season heat fan with electric heating elements powered by rotating rings and ball bearings
WO2012107047A3 (en) * 2011-02-07 2012-10-18 Soro Holding Aps Heating fan
EP4316322A1 (de) * 2022-08-02 2024-02-07 Vorwerk & Co. Interholding GmbH Strömungserzeuger, küchenmaschine und verfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737912A (en) * 1928-01-09 1929-12-03 E H Christian Rotary heating device
DD208445A1 (de) * 1982-03-01 1984-05-02 Elektrogeraete Ingbuero Veb Anordnung mit rotierenden ptc-elementen zur heizung und gleichzeitigen foerderung von stroemungsmitteln
US4782213A (en) * 1987-08-19 1988-11-01 Paul Teal Ceiling fan electrically heating environmental air
AU3454099A (en) * 1998-03-27 1999-10-18 Thermo&Bullstone Usa, Llc Thin film heated fan blade

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167776A3 (de) * 2000-06-29 2002-10-23 E.G.O. ELEKTRO-GERÄTEBAU GmbH Ventilator
US7043146B2 (en) 2003-12-15 2006-05-09 Solomon Semaza All season heat fan with electric heating elements powered by rotating rings and ball bearings
WO2012107047A3 (en) * 2011-02-07 2012-10-18 Soro Holding Aps Heating fan
CN103443471A (zh) * 2011-02-07 2013-12-11 索罗控股有限公司 加热风扇
EP4316322A1 (de) * 2022-08-02 2024-02-07 Vorwerk & Co. Interholding GmbH Strömungserzeuger, küchenmaschine und verfahren

Also Published As

Publication number Publication date
EP0964211A3 (de) 2002-06-26
ITMI981324A1 (it) 1999-12-13

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