EP1530682A1 - Lüfterrad mit integrierter fettabscheidung, insbesondere für ein gargerät - Google Patents
Lüfterrad mit integrierter fettabscheidung, insbesondere für ein gargerätInfo
- Publication number
- EP1530682A1 EP1530682A1 EP03790684A EP03790684A EP1530682A1 EP 1530682 A1 EP1530682 A1 EP 1530682A1 EP 03790684 A EP03790684 A EP 03790684A EP 03790684 A EP03790684 A EP 03790684A EP 1530682 A1 EP1530682 A1 EP 1530682A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan wheel
- elevation
- base plate
- wheel according
- air
- 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
Links
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
- F04D29/289—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps having provision against erosion or for dust-separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D23/00—Other rotary non-positive-displacement pumps
- F04D23/001—Pumps adapted for conveying materials or for handling specific elastic fluids
-
- 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
-
- 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
- F04D29/30—Vanes
Definitions
- the present invention relates to a fan wheel with a base plate and a plurality of air wheel blades fixed to the base plate, the air wheel blades being arranged essentially perpendicular to the base plate and forming an essentially radial arrangement, each air wheel blade having a radially outer and substantially perpendicular to the base plate arranged front edge, a radially inner and substantially perpendicular to the base plate rear edge, an outer surface arranged on the pressure side of the fan wheel and an inner surface arranged on the suction side of the fan wheel.
- Fan wheels are generally known from the prior art and are generally used to circulate air. Fan wheels are known in the most varied of forms, for example fan wheels with propeller-like blades or also with blade-like blades are known. A problem with fan wheels known from the prior art is that solid and / or liquid particles which are present in the circulated air can deposit on the blades of the fan wheel, which leads to contamination of the fan wheel. The known fan wheels can also lead to an undesirable distribution of the solid and / or liquid particles.
- the circulation of solid and / or liquid particles, in particular in the form of fat particles, is particularly problematic if the fan wheel is arranged within a cooking appliance.
- the fan wheel in a cooking device is usually arranged in a fan room separated from the cooking chamber via an air baffle, sucks in air from the cooking chamber and directs it radially to the surrounding walls, so as to allow air to flow inside the cooking device, from the cooking chamber to the fan chamber and back again to the cooking space.
- Concentric A heating device or also a heat exchanger is often arranged around the fan wheel, so that circulated air is also guided past this heating device or this heat exchanger in order to be heated.
- fat particles present in the circulated air can also be directed to the heating device, for example, where they can be burned, which can lead to a reduction in the quality of the food and to an unpleasant smell.
- This problem arises in particular when the air inside the cooking device is continuously circulated by the fan wheel, the solid and / or liquid particles then being kept constantly in the gas volume by the circulating air flow.
- a device In order to reduce the separation of solid and / or liquid particles that are circulated by the fan wheel within a cooking device, a device is known from DE 42 06 846 C2, which comprises an impact surface or a separating ring around the fan wheel on which or onto which a gas flow prevailing in the gas volume occurs, wherein the solid and / or liquid particles separate at least partially on impact and can run to a first discharge area.
- DE 43 074 05 C2 discloses a fan wheel with a number of radially arranged blades, which project essentially parallel to the axis of rotation of the fan wheel from a support disk or base plate facing a housing wall of the cooking chamber, in which at least between some of the blades near the support disk, but at a distance from it, baffles are arranged, the radially outer outer edge of which is essentially flush with the outer circumference of the fan wheel, the radially inner inner edges are at a distance from the axis of rotation of the fan wheel and the one with the support disk and the two adjacent blades each form a nozzle device for generating a radially outward gas flow near the support disk.
- a fan wheel is known from US Pat. No. 1,688,345, in which at least one elevation is arranged on the outer surface of at least part of the fan blades and extends away from the base plate.
- a disadvantage of the devices known from the prior art is that the efficiency of the fan wheel is reduced by the additional devices surrounding the fan wheel or arranged in the fan wheel, since the additional devices practically represent a flow obstacle for the circulated air.
- the object of the present invention is therefore to develop the generic fan wheel in such a way that the disadvantages of the prior art are overcome.
- the object of the present invention is achieved in that at least one elevation is arranged and / or formed on the outer surface of at least part of the air wheel blades, which is spaced apart from the base plate and away from the base plate, essentially diagonally from the front edge to the rear edge the fan blades extends.
- the elevation is in the form of a step on and / or in the outer surface.
- the invention also proposes that the air wheel blades be curved so that the outer surface between the front edge and the rear edge curves radially outward.
- At least one elevation at least in some areas, has a height of approximately 1 to 10 mm, preferably 2 to 4 mm.
- At least one elevation has a width of at least 1 to 10 mm, preferably 2 to 4 mm.
- the fan wheel according to the invention is preferably characterized in that the distance from at least one elevation to the base plate is at least in some areas, in particular in the area of the front edge, at least approximately 5 to 25 mm, preferably 10 to 20 mm.
- the invention also proposes a support member, such as in the form of a cover ring, of the air wheel blades on the side of the air wheel blades opposite the base plate.
- At least one elevation is at least partially curved, whereby it preferably bends away from the respective trailing edge to the respective leading edge away from the support member.
- At least one elevation meet the front edge at an angle of 45 ° to 90 °, preferably at an angle of 70 ° to 90 °.
- At least one elevation has a distance from the support member, in particular in the area of the rear edge, of at least about 1 to 10 mm, preferably 5 to 15 mm.
- At least one elevation is formed by at least one wire.
- At least one elevation is welded onto the outer surface of the air wheel vane, at least in some areas.
- At least one air wheel blade preferably each air wheel blade, in the fastening area between the respective elevation and the outer surface, at least in some areas, a pronounced edge, such as in the form of a groove, is formed on the side lying in the direction of rotation of the fan wheel.
- at least one elevation has a profiled cross section, at least in some areas, is preferably curved, the focal point of the curvature in particular being on the side of the elevation facing the rear edge, and / or at least one groove, preferably on the side facing the rear edge, having.
- At least one elevation on the side facing away from the direction of rotation of the fan wheel is at least partially sealed to the outer surface, preferably with silicone.
- a fan wheel according to the invention can be arranged in a cooking appliance.
- the present invention is based on the surprising finding that elevations on the outer surfaces of air wheel blades on a base plate, on the one hand, avoid that solid and / or liquid particles contained in circulated air, in particular in the form of fat particles, are deflected radially directly by the fan wheel , Rather, solid and / or liquid particles that meet the outer surfaces of the air wheel blades are stopped at the elevation and are diverted towards the base plate by the special geometry of the elevation. In the area of the base plate, the solid and / or liquid particles can then be released from the air wheel blades without hitting devices which are arranged directly radially around the fan wheel, such as a heating device within a cooking device.
- the fan wheel according to the invention surprisingly ensures that the efficiency of the fan wheel is not significantly impaired, since there are no major obstacles in the radial flow of the circulated air. Further
- the elevations arranged on the outside of the fan wheel blades themselves can provide additional stability for the air wheel blades.
- FIG. 1 shows a perspective view of a fan wheel according to the invention.
- the figure shows a perspective view of a fan wheel 1 according to the invention, which can be installed in a fan chamber of a partially illustrated cooking appliance, in order to circulate air in the direction of arrow A in the cooking chamber, which is divided in regions from the fan chamber by an air baffle (not shown).
- the fan wheel 1 has a base plate 2, on which a plurality of air wheel blades 3 are arranged, which face the cooking chamber of the cooking device.
- the Heilerradschaufeln 3 are curved and arranged substantially perpendicular to the base plate 2 to form a substantially radial arrangement on the base plate 2.
- Each air wheel vane 3 has a rear edge 5, which first contacts the air to be circulated during operation, and an outer surface 6 arranged on the pressure side of the fan wheel 1 during operation.
- an elevation 7 which extends away from the base plate 2, essentially diagonally from a front edge 4 to the rear edge 5 of the air wheel blade 3.
- the elevation 7 is arranged at a distance of 10 to 20 mm from the base plate 2 on the outer surface 6.
- the elevation 7 can extend completely over the entire width of the air wheel vane 3, or be at a distance from the side of the air wheel vane 3 opposite the base plate 2, this distance preferably being 5 to 15 mm.
- a cover ring 8 is provided, which ensures additional stabilization of the air wheel blades 3 within the fan wheel 1.
- the elevation 7 should stand out from the outer surface 6 of the air wheel vane 3 by 2 to 5 mm and end at the end facing the air flow on the rear edge 5 of the air wheel vane 3 with a sharp edge in order to lead to a drainage channel for impinging solid and / or liquid particles form, which prevents a further flow of solid and / or liquid particles, beyond the elevation 7, but causes a guide in the direction of the base plate 2.
- a seal can be provided on the side lying in the flow shadow between the outer surface 6 and the elevation 7. This sealing can take place, for example, with silicone, but any other sealing can be provided which is obvious to a person skilled in the art in this field.
- the fan wheel 1 is rotated in the fan space in the figure in the direction of arrow A by a motor, not shown, and thus sucks air from the cooking space centrally through a central opening in the air baffle and leads it radially outward, so that it leaves the fan space outside passed air baffles back into the cooking space.
- Solid and / or liquid particles in particular fat particles of different sizes, which reach the area of the fan wheel 1, impinge on the outer surfaces 6 of the fan wheel blades 3, on the pressure side of the fan wheel, and are discharged along the elevation 7 in the direction of the base plate 2 , If the solid and / or liquid particles reach the end region of the elevation 7 on the front edge 4 of the air wheel vane 3 (and finally the base plate 2), the solid and / or liquid particles then dispensed cannot directly reach a device radially surrounding the fan wheel 1, such as in the form of a heater, not shown, or a heat exchanger, not shown.
- the fan wheel according to the invention in a cooking appliance thus prevents solid and / or liquid particles, for example, from being deposited directly on a heating device surrounding the fan wheel 1, and also ensures that air circulated by the fan wheel 1 can be diverted essentially completely radially, since the efficiency of the fan wheel 1 is only slightly reduced by the increase 7.
- the fan wheel 1 itself receives a higher stability through the elevations 7. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10239246A DE10239246C1 (de) | 2002-08-22 | 2002-08-22 | Lüfterrad mit integrierter Fettabscheidung, insbesondere für ein Gargerät |
DE10239246 | 2002-08-22 | ||
PCT/DE2003/002640 WO2004020837A1 (de) | 2002-08-22 | 2003-08-06 | Lüfterrad mit integrierter fettabscheidung, insbesondere für ein gargerät |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1530682A1 true EP1530682A1 (de) | 2005-05-18 |
EP1530682B1 EP1530682B1 (de) | 2006-05-31 |
EP1530682B2 EP1530682B2 (de) | 2015-04-15 |
Family
ID=27618865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030790684 Expired - Lifetime EP1530682B2 (de) | 2002-08-22 | 2003-08-06 | Lüfterrad mit integrierter fettabscheidung, insbesondere für ein gargerät |
Country Status (5)
Country | Link |
---|---|
US (1) | US7165942B2 (de) |
EP (1) | EP1530682B2 (de) |
JP (1) | JP4255912B2 (de) |
DE (2) | DE10239246C1 (de) |
WO (1) | WO2004020837A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10239246C1 (de) | 2002-08-22 | 2003-08-21 | Rational Ag | Lüfterrad mit integrierter Fettabscheidung, insbesondere für ein Gargerät |
DE10315341C5 (de) * | 2003-04-03 | 2009-07-30 | Mkn Maschinenfabrik Kurt Neubauer Gmbh & Co. | Gargerät mit einem Gebläse mit Radialgebläserad und Abscheideelement |
US7112043B2 (en) * | 2003-08-29 | 2006-09-26 | General Motors Corporation | Compressor impeller thickness profile with localized thick spot |
EP1961966A1 (de) * | 2007-02-26 | 2008-08-27 | Josip Pavetic | Radial-Lüfterrad |
EP1961969A3 (de) | 2007-02-26 | 2009-10-21 | Josip Pavetic | Radial-Lüfterrad |
EP1961967A1 (de) * | 2007-02-26 | 2008-08-27 | Josip Pavetic | Radial-Lüfterrad und damit ausgestattetes Radialgebläse |
EP1961968A1 (de) | 2007-02-26 | 2008-08-27 | Josip Pavetic | Radial-Lüfterrad und damit ausgestattetes Radialgebläse mit Verschleissschutz |
EP2143958A1 (de) | 2008-07-07 | 2010-01-13 | Josip Pavetic | In einem Rohr eingebundener Lüfter |
EP2284401B1 (de) | 2009-08-11 | 2013-01-30 | Rational AG | Lüfterrad und Gargerät |
WO2011053278A1 (en) * | 2009-10-27 | 2011-05-05 | General Electric Company | Droplet catcher for centrifugal compressor |
EP2372163B1 (de) | 2010-04-01 | 2014-10-08 | Convotherm Elektrogeräte GmbH | Lüfterrad |
ITUB20152807A1 (it) * | 2015-08-03 | 2017-02-03 | Ma Ti Ka S R L | Ventola per forni per la cottura di alimenti |
DE102016212162A1 (de) * | 2016-07-04 | 2018-01-04 | Convotherm-Elektrogeräte Gmbh | Gewerbliches Gargerät |
DE102017203539A1 (de) | 2017-03-03 | 2018-09-06 | Convotherm-Elektrogeräte Gmbh | Lüfterrad |
WO2018158226A1 (de) | 2017-03-03 | 2018-09-07 | Convotherm-Elektrogeräte Gmbh | Lüfterrad |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US168345A (en) * | 1875-10-05 | Improvement in car-couplings | ||
US262642A (en) * | 1882-08-15 | Fan-blower | ||
US1688345A (en) | 1927-08-16 | 1928-10-23 | Buffalo Hammer Mill Corp | Centrifugal fan |
DE729947C (de) | 1937-02-09 | 1943-01-05 | Danneberg & Quandt Alleiniger | Geblaeselaufrad |
US2616764A (en) | 1948-05-22 | 1952-11-04 | Earl M Parrish | Wear resistant blower surface |
FR2588925A1 (fr) | 1985-10-23 | 1987-04-24 | Etri Sa | Ventilateur equipe de moyens pour reduire le bruit engendre par la rotation de ses pales |
FR2606465B1 (fr) | 1986-11-06 | 1989-01-13 | Ducellier & Cie | Ventilateur de machine electrique tournante |
DE3814721A1 (de) † | 1988-04-30 | 1989-11-09 | Asea Brown Boveri | Radialluefter mit integriertem schmutzabscheider |
DE4206846C2 (de) * | 1992-03-04 | 1995-11-16 | Rational Gmbh | Vorrichtung zum Abscheiden von Feststoff- und/oder Flüssigkeitspartikeln aus einem Gasvolumen |
DE4220960A1 (de) | 1992-06-25 | 1994-01-05 | Turbowerke Meisen Ventilatoren | Schaufeln für Arbeitsmaschinen |
DE4307405C1 (de) | 1993-03-09 | 1994-11-17 | Rational Gmbh | Lüfterrad |
DE10239246C1 (de) | 2002-08-22 | 2003-08-21 | Rational Ag | Lüfterrad mit integrierter Fettabscheidung, insbesondere für ein Gargerät |
-
2002
- 2002-08-22 DE DE10239246A patent/DE10239246C1/de not_active Expired - Fee Related
-
2003
- 2003-08-06 WO PCT/DE2003/002640 patent/WO2004020837A1/de active IP Right Grant
- 2003-08-06 JP JP2004531451A patent/JP4255912B2/ja not_active Expired - Lifetime
- 2003-08-06 US US10/525,192 patent/US7165942B2/en not_active Expired - Lifetime
- 2003-08-06 DE DE50303600T patent/DE50303600D1/de not_active Expired - Lifetime
- 2003-08-06 EP EP20030790684 patent/EP1530682B2/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004020837A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20060165528A1 (en) | 2006-07-27 |
EP1530682B1 (de) | 2006-05-31 |
JP2005536683A (ja) | 2005-12-02 |
US7165942B2 (en) | 2007-01-23 |
WO2004020837A1 (de) | 2004-03-11 |
DE50303600D1 (de) | 2006-07-06 |
EP1530682B2 (de) | 2015-04-15 |
DE10239246C1 (de) | 2003-08-21 |
JP4255912B2 (ja) | 2009-04-22 |
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