EP1536184A1 - A fan runner particularly for food cooking ovens - Google Patents
A fan runner particularly for food cooking ovens Download PDFInfo
- 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- Withdrawn
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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.
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- 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)
Abstract
Description
- The present invention relates to a fan particularly for food cooking ovens.
- Currently known fans for food ovens are constituted by a sheet metal disk provided with a ring of vanes, also made of sheet metal, and with an axial hole for keying to a rotation shaft.
- The 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.
- Although these known fans are widely appreciated commercially and are in widespread use for the ventilation of ovens particularly for cooking food, they have aspects that can be improved.
- Obtaining the 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.
- Moreover, the operation for welding the vanes to the disk requires a long time and a substantial use of specialized labor.
- 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.
- Within this aim, 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.
- This aim and these and other objects that will become better apparent hereinafter are achieved by 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.
- Further characteristics and advantages of the present invention will become better apparent from the following detailed description of two preferred but not exclusive embodiments thereof, illustrated by way of nonlimiting example in the accompanying drawings, wherein:
- Figure 1 is a perspective view of a fan according to the invention, in a first embodiment;
- Figure 2 is a front view of a fan according to the invention, as shown in Figure 1;
- Figure 3 is an exploded perspective view of a fan according to the invention, as shown in Figures 1 and 2;
- Figure 4 is a perspective view of a fan according to the invention in a second embodiment;
- Figure 5 is a front view of a fan according to the invention, as shown in Figure 4;
- Figure 6 is an exploded perspective view of a fan according to the invention, as shown in Figures 4 and 5.
-
- With reference to the figures, a fan according to the invention, in a first embodiment, is generally designated by the
reference numeral 10. - The
fan 10 comprises adisk 40, which is constituted by two coaxial and adjacent plate-like disks 11. - The
disks 11, referenced hereinafter asfirst disk 11a andsecond disk 11b, are provided respectively with afirst ring 12a and asecond ring 12b of vanes; the vanes are designated by thereference numerals 13a for thefirst disk second disk 11b. - The
second disk 11b, arranged in front of thefirst disk 11a, is provided withslots 14b for the insertion of thecorresponding vanes 13a of thefirst disk 11a that is adjacent thereto. - The first and
second disks - Each one of the
vanes annular sector second disks - The
slots 14b are arranged in an intermediate position between twosuccessive vanes 13b. - The
fan 10 therefore has an alternate arrangement of afirst vane 13a and of asecond vane 13b. - The
vanes first disk 11a and of thesecond disk 11b. - The bending line of each one of the
vanes - A
receptacle 16 for akeying shim 17 is formed between thefirst disk 11a and thesecond disk 11b at anaxial hole 20 for keying to a rotation shaft, which is not shown. - The
receptacle 16 is formed by afirst camber 16a on thefirst disk 11a, which faces a mirror-symmetricalsecond camber 16b on thesecond disk 11b. - The
shim 17 forms a surface that is suitable to prevent oscillations in an axial direction of thefan 10 on the shaft to which it is keyed. - The
first disk 11a and thesecond disk 11b are joined to each other and to theshim 17 by means ofspot welds 30. - The
spot welds 30 are distributed in an annular fashion in the available regions between the vanes. - In this first embodiment, the
first disk 11 a and thesecond 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 adisk 140, which is constituted by afirst disk 111a for reinforcing asecond disk 111b provided with a ring ofvanes 112. - In this embodiment also, the first disk and the second disk, respectively 111a and 111b, are made of sheet metal.
- Each
vane 113 is obtained by cutting and bending a portion of a correspondingannular sector 115 of thesecond disk 111b. - The
second disk 111b therefore has twice as many vanes as one of the first andsecond disks - The
vanes 113 are also bent at 90° with respect to the plane of arrangement of the two first andsecond disks - 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 thefirst disk 111a and thesecond disk 111b at anaxial keying hole 120. - The
receptacle 16 is formed by afirst camber 116a on thefirst disk 111a, which faces a mirror-symmetricalsecond camber 116b on thesecond disk 111b. - In a manner similar to the first embodiment of the present invention, the
first disk 111a and thesecond disk 111b are joined to each other and to theshim 17 by means ofspot 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.
- In practice, it has been found that the invention thus described solves the problems noted in conventional fans particularly for food cooking ovens.
- In particular, the present invention provides a fan that is easy and quick to assemble.
- Moreover, the present invention provides a fan that can be obtained cheaply, saving material with respect to known types.
- Further, the present invention provides a fan that can be made of sheet metal.
- Moreover, the present invention provides a fan that has at least the same efficiency as known types of fan.
- Still further, the present invention provides a fan particularly for food cooking ovens that can be manufactured with known facilities and technologies.
- In practice, the materials employed, so long as they are compatible with the specific use, as well as the dimensions, may be any according to requirements and to the state of the art.
- The disclosures in Italian Utility Model Application No. PD2003U000104 from which this application claims priority are incorporated herein by reference.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (9)
- A fan particularly for food cooking ovens, of the type that comprises a disk (40, 140) provided with a ring of vanes (12, 112) and with an axial hole (20, 120) for keying to a rotation shaft, characterized in that said disk (40, 140) is constituted by at least two coaxial and adjacent plate-like disks (11a, 11b, 111a, 111b), a ring of vanes (12a, 12b, 112) being provided on at least one of said two disks (11a, 11b, 111b), each one of said vanes (13a, 13b, 113) being obtained by cutting and bending a portion of a corresponding annular sector (15a, 15b, 115) of said at least one of said two disks (11a, 11b, 111b).
- The fan according to claim 1, characterized in that it comprises two of said at least two disks (11a, 11b, 111a, 111b).
- The fan according to one or more of the preceding claims, characterized in that it comprises a first disk (11a) and a second disk (11b), provided respectively with a first ring (12a) and with a second ring (12b) of vanes (13a, 13b), at least one of said first and second disks (11a, 11b) being provided with slots (14a, 14b) for the insertion of the corresponding vanes (13b, 13a) of the other disk (11b, 11a) that is adjacent thereto.
- The fan according to one or more of the preceding claims, characterized in that said slots (14a, 14b) are arranged in an intermediate position between two successive vanes (13a, 13b).
- The fan according to claims 1 and 2, characterized in that it comprises a first reinforcement disk (111a) for a second disk (111b) provided with a ring (112) of vanes (113).
- The fan according to one or more of the preceding claims, characterized in that a receptacle (16, 116) for a keying shim (17, 117) is formed between said first and second disks (11a, 111a; 11b, 111b) at said axial hole (20, 120).
- The fan according to one or more of the preceding claims, characterized in that said vanes (13a, 13b, 113) are folded at 90° with respect to the plane of arrangement of said at least two disks (11a, 11b, 111b), the bending line of said vanes (13a, 13b, 113) having a radial direction.
- The fan according to one or more of the preceding claims, characterized in that said at least two disks (11a, 11b, 111b) are made of sheet metal.
- The fan according to one or more of the preceding claims, characterized in that said first disk (11a, 111a) and said second disk (11b, 111b) are joined to each other and to said shim (17, 117) by means of spot welds (30, 130).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD20030104 ITPD20030104U1 (en) | 2003-11-14 | 2003-11-14 | IMPROVED FAN STRUCTURE PARTICULARLY FOR OVENS FOR FOOD COT URA |
ITPD20030104 | 2003-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1536184A1 true EP1536184A1 (en) | 2005-06-01 |
Family
ID=43725029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04105586A Withdrawn EP1536184A1 (en) | 2003-11-14 | 2004-11-08 | A fan runner particularly for food cooking ovens |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1536184A1 (en) |
IT (1) | ITPD20030104U1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007010924U1 (en) | 2007-08-06 | 2008-12-11 | Klouda, Jaroslav | Fan impeller for thermal appliances with cleaning |
US8132500B2 (en) | 2008-04-04 | 2012-03-13 | Illinois Tool Works Inc. | Humidity controlled food warming cabinet |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9212649U1 (en) * | 1992-09-19 | 1994-01-27 | Ebm Elektrobau Mulfingen Gmbh & Co, 74673 Mulfingen | Fan unit for installation in the cooking container of ovens |
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 |
-
2003
- 2003-11-14 IT ITPD20030104 patent/ITPD20030104U1/en unknown
-
2004
- 2004-11-08 EP EP04105586A patent/EP1536184A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9212649U1 (en) * | 1992-09-19 | 1994-01-27 | Ebm Elektrobau Mulfingen Gmbh & Co, 74673 Mulfingen | Fan unit for installation in the cooking container of ovens |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007010924U1 (en) | 2007-08-06 | 2008-12-11 | Klouda, Jaroslav | Fan impeller for thermal appliances with cleaning |
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 (en) | 2005-05-15 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL HR LT LV MK YU |
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17P | Request for examination filed |
Effective date: 20050621 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: UNOX S.R.L. |
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Effective date: 20080219 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20080830 |