EP1536184A1 - Gebläse-Laufrad, insbesondere für einen Backofen - Google Patents

Gebläse-Laufrad, insbesondere für einen Backofen Download PDF

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Publication number
EP1536184A1
EP1536184A1 EP04105586A EP04105586A EP1536184A1 EP 1536184 A1 EP1536184 A1 EP 1536184A1 EP 04105586 A EP04105586 A EP 04105586A EP 04105586 A EP04105586 A EP 04105586A EP 1536184 A1 EP1536184 A1 EP 1536184A1
Authority
EP
European Patent Office
Prior art keywords
vanes
disk
disks
fan
fan according
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Withdrawn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
EP04105586A
Other languages
English (en)
French (fr)
Inventor
Enrico Franzolin
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.)
Unox SRL
Original Assignee
Unox SpA
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 Unox SpA filed Critical Unox SpA
Publication of EP1536184A1 publication Critical patent/EP1536184A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation

Definitions

  • the present invention relates to a fan particularly for food cooking ovens.
  • vanes of the ring are obtained separately with respect to the disk and are fixed thereto by means of spot welds provided at the root of said vanes.
  • vanes by cutting sheet metal in fact entails an important waste of material, while connecting the vanes to the disk that supports them by means of spot welds may lead to an incorrect inclination of the vanes with respect to the disk as well as to a deformation of the disk, with consequent imbalances and unwanted vibrations of the fan, all this being detrimental to the performance of the fan and to its quietness.
  • the aim of the present invention is to provide a fan particularly for food cooking ovens that solves the problems and drawbacks of known types.
  • an obj ect of the present invention is to provide a fan that is easy and quick to assemble.
  • Another object of the present invention is to provide a fan that can be obtained at low cost by saving material with respect to known types.
  • Another object of the present invention is to provide a fan that can be made of sheet metal.
  • a further object of the present invention is to provide a fan that is at least as efficient as known types of fan.
  • a still further object of the present invention is to provide a fan particularly for food cooking ovens that can be manufactured with known systems and technologies.
  • a fan particularly for food cooking ovens of the type that comprises a disk provided with a ring of vanes and with an axial hole for keying to a rotation shaft, characterized in that said disk is constituted by at least two coaxial and adjacent plate-like disks, a ring of vanes being provided on at least one of said two disks, each one of said vanes being obtained by cutting and bending a portion of a corresponding annular sector of said at least one of said two disks.
  • a fan according to the invention in a first embodiment, is generally designated by the reference numeral 10.
  • the fan 10 comprises a disk 40, which is constituted by two coaxial and adjacent plate-like disks 11.
  • first disk 11a and second disk 11b are provided respectively with a first ring 12a and a second ring 12b of vanes; the vanes are designated by the reference numerals 13a for the first disk 11a and 13b for the second disk 11b.
  • the second disk 11b arranged in front of the first disk 11a, is provided with slots 14b for the insertion of the corresponding vanes 13a of the first disk 11a that is adjacent thereto.
  • the first and second disks 11a and 11b are made of sheet metal.
  • Each one of the vanes 13a and 13b is obtained by cutting and bending a portion of a corresponding annular sector 15a and 15b, respectively, of the first and second disks 11a and 11b.
  • the slots 14b are arranged in an intermediate position between two successive vanes 13b.
  • the fan 10 therefore has an alternate arrangement of a first vane 13a and of a second vane 13b.
  • the vanes 13a and 13b are bent at 90° with respect to the plane of arrangement of the first disk 11a and of the second disk 11b.
  • the bending line of each one of the vanes 13a and 13b has a radial direction.
  • a receptacle 16 for a keying shim 17 is formed between the first disk 11a and the second disk 11b at an axial hole 20 for keying to a rotation shaft, which is not shown.
  • the receptacle 16 is formed by a first camber 16a on the first disk 11a, which faces a mirror-symmetrical second camber 16b on the second disk 11b.
  • the shim 17 forms a surface that is suitable to prevent oscillations in an axial direction of the fan 10 on the shaft to which it is keyed.
  • the first disk 11a and the second disk 11b are joined to each other and to the shim 17 by means of spot welds 30.
  • the spot welds 30 are distributed in an annular fashion in the available regions between the vanes.
  • first disk 11 a and the second disk 11b are provided with six vanes, respectively 13a and 13b, which are spaced by six slots, respectively 14a and 14b.
  • a second embodiment of a fan according to the invention is designated by the reference numeral 110 in Figures 4, 5 and 6.
  • the fan 110 is provided with a disk 140, which is constituted by a first disk 111a for reinforcing a second disk 111b provided with a ring of vanes 112.
  • the first disk and the second disk are made of sheet metal.
  • Each vane 113 is obtained by cutting and bending a portion of a corresponding annular sector 115 of the second disk 111b.
  • the second disk 111b therefore has twice as many vanes as one of the first and second disks 11a and 11b.
  • the vanes 113 are also bent at 90° with respect to the plane of arrangement of the two first and second disks 111a and 111b.
  • the bending line of each one of the vanes 113 has a radial direction.
  • a receptacle 116 for a keying shim 117 is formed between the first disk 111a and the second disk 111b at an axial keying hole 120.
  • the receptacle 16 is formed by a first camber 116a on the first disk 111a, which faces a mirror-symmetrical second camber 116b on the second disk 111b.
  • first disk 111a and the second disk 111b are joined to each other and to the shim 17 by means of spot welds 130.
  • the spot welds 130 are distributed in an annular fashion in the available regions between the vanes.
  • Both of the embodiments described above can be manufactured easily and cheaply by stamping the disks from sheet metal so as to obtain the cambers, the slots, the hole and the profile of the vanes.
  • the disks provided with vanes are then subjected to the operation for folding the vanes.
  • the rings of vanes are thus obtained so as to avoid the wastes of material that would have occurred by cutting each individual vane separately, and the assembly time and costs are also reduced with respect to known vanes, which are burdened by the operations for welding each individual vane to the supporting disk.
  • the present invention provides a fan that is easy and quick to assemble.
  • the present invention provides a fan that can be obtained cheaply, saving material with respect to known types.
  • the present invention provides a fan that can be made of sheet metal.
  • the present invention provides a fan that has at least the same efficiency as known types of fan.
  • the present invention provides a fan particularly for food cooking ovens that can be manufactured with known facilities and technologies.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Stoves And Ranges (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP04105586A 2003-11-14 2004-11-08 Gebläse-Laufrad, insbesondere für einen Backofen Withdrawn EP1536184A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD20030104 ITPD20030104U1 (it) 2003-11-14 2003-11-14 Struttura perfezionata di ventola particolarmente per forni per la cot ura di alimenti
ITPD20030104 2003-11-14

Publications (1)

Publication Number Publication Date
EP1536184A1 true EP1536184A1 (de) 2005-06-01

Family

ID=43725029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105586A Withdrawn EP1536184A1 (de) 2003-11-14 2004-11-08 Gebläse-Laufrad, insbesondere für einen Backofen

Country Status (2)

Country Link
EP (1) EP1536184A1 (de)
IT (1) ITPD20030104U1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007010924U1 (de) 2007-08-06 2008-12-11 Klouda, Jaroslav Gebläselaufrad für thermische Geräte mit Reinigung
US8132500B2 (en) 2008-04-04 2012-03-13 Illinois Tool Works Inc. Humidity controlled food warming cabinet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9212649U1 (de) * 1992-09-19 1994-01-27 Ebm Elektrobau Mulfingen Gmbh & Co, 74673 Mulfingen Gebläseeinheit zum Einbau in Garbehälter von Öfen
US5594288A (en) * 1994-02-18 1997-01-14 Daniel Industries, Inc. Laminated rotor assembly
US20030111069A1 (en) * 2001-12-14 2003-06-19 Maytag Corporation Convection fan assembly for a cooking appliance
US20030205569A1 (en) * 2002-05-06 2003-11-06 Chang Kwei Tang Dual-purpose pot for roasting and frying

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9212649U1 (de) * 1992-09-19 1994-01-27 Ebm Elektrobau Mulfingen Gmbh & Co, 74673 Mulfingen Gebläseeinheit zum Einbau in Garbehälter von Öfen
US5594288A (en) * 1994-02-18 1997-01-14 Daniel Industries, Inc. Laminated rotor assembly
US20030111069A1 (en) * 2001-12-14 2003-06-19 Maytag Corporation Convection fan assembly for a cooking appliance
US20030205569A1 (en) * 2002-05-06 2003-11-06 Chang Kwei Tang Dual-purpose pot for roasting and frying

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007010924U1 (de) 2007-08-06 2008-12-11 Klouda, Jaroslav Gebläselaufrad für thermische Geräte mit Reinigung
US8132500B2 (en) 2008-04-04 2012-03-13 Illinois Tool Works Inc. Humidity controlled food warming cabinet

Also Published As

Publication number Publication date
ITPD20030104U1 (it) 2005-05-15

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