EP1961966A1 - Roue de ventilateur radiale - Google Patents

Roue de ventilateur radiale Download PDF

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Publication number
EP1961966A1
EP1961966A1 EP07003875A EP07003875A EP1961966A1 EP 1961966 A1 EP1961966 A1 EP 1961966A1 EP 07003875 A EP07003875 A EP 07003875A EP 07003875 A EP07003875 A EP 07003875A EP 1961966 A1 EP1961966 A1 EP 1961966A1
Authority
EP
European Patent Office
Prior art keywords
fan
blades
fan wheel
flow
wheel 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Withdrawn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
EP07003875A
Other languages
German (de)
English (en)
Inventor
Josip Pavetic
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP07003875A priority Critical patent/EP1961966A1/fr
Priority to EP08151624A priority patent/EP1961969A3/fr
Priority to CNA2008101003800A priority patent/CN101349281A/zh
Publication of EP1961966A1 publication Critical patent/EP1961966A1/fr
Withdrawn legal-status Critical Current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
    • F04D29/289—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

Definitions

  • the present invention relates to a fan wheel having a base plate and a plurality of fan blades mounted on the base plate, wherein the fan blades are arranged substantially perpendicular to the base plate and form a substantially radial arrangement, each fan blade being radially outwardly and substantially perpendicular to the base plate arranged front edge, a radially inside and arranged substantially perpendicular to the base plate trailing edge, arranged on the pressure side of the fan outer surface and arranged on the suction side of the fan inner surface.
  • Fan wheels are well known in the art and typically serve to circulate air. Fan wheels are known in a variety of forms, for example, fan wheels are known with propeller-like wings or with blade-like wings.
  • One problem with fan wheels known in the art is that particulate matter and / or liquid particles present in the recirculated air may deposit on the blades of the fan wheel, resulting in fouling of the fan wheel.
  • the fan wheel is arranged in a cooking appliance mostly in a separate from the cooking chamber via a baffle fan space, sucks air from the cooking chamber and directs them radially to the surrounding walls, so as an air flow within the cooking appliance, from the cooking chamber in the fan room and back to the cooking chamber, to produce.
  • Concentric around the fan around a heater or a heat exchanger is often arranged so that circulating air is also passed to this heater or this heat exchanger to be heated.
  • fat particles present within the circulated air can be conducted to, for example, the heating device, where they are can be burned, which can lead to a reduction in the quality of the food and to an odor nuisance.
  • This problem arises, in particular, when the air within the cooking appliance is permanently circulated through the fan wheel, in which case the solid and / or liquid particles are constantly held in the gas volume by the circulating air flow.
  • a device which comprises an impact surface or a separating ring around the fan wheel, onto which or onto which a gas stream prevailing in the gas volume occurs, wherein the solid and / or liquid particles at least partially separate on impact and run to a first discharge region can.
  • a fan with a number of radially arranged blades which project substantially in parallel to the axis of rotation of the fan from a housing wall of the cooking chamber facing support disc or base plate, known in which at least between some of the blades near the support disk, but at a distance from this , Baffles are arranged, the radially outer outer edge substantially aligned with the outer circumference of the fan wheel, the radially inner inner edges spaced from the axis of rotation of the fan and with the support disk and the respective adjacent two blades each have a nozzle means for generating a radially outward directed gas flow near the support disk.
  • a fan is known in which on the outer surface of at least a portion of the fan blades at least one elevation is arranged, which 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 fan surrounding the wheel or arranged in the fan additional devices, as the additional devices represent a flow obstacle for the circulated air practically.
  • Object of the present invention is therefore to develop the generic fan to the effect that the disadvantages of the prior art are overcome.
  • it is intended to prevent solids and / or liquid particles present in a circulating air in a cooking appliance from passing directly through the fan wheel onto a heating device or heat exchanger surrounding the fan wheel, without the efficiency of the fan is significantly reduced.
  • the object of the present invention is achieved in that arranged and / or formed on the outer surface of at least a portion of the fan blades at least one elevation which is formed spaced from the base plate and away from the base plate, substantially diagonally from the leading edge to the trailing edge the fan blades extends.
  • the increase in the form of a step is formed on and / or in the outer surface.
  • the fan blades are curved so that the outer surface between the front edge and the rear edge curves radially outward.
  • At least one increase, at least in some areas, has a height of approximately 1 to 10 mm, preferably 2 to 4 mm.
  • At least one increase at least in regions has a width of 1 to 10 mm, preferably 2 to 4 mm.
  • the fan according to the invention is preferably characterized in that the distance of at least one increase to the base plate at least in regions, in particular in the region of the leading edge, at least about 5 to 25 mm, preferably 10 to 20 mm.
  • a support member such as in the form of a bezel, the Lüfterradschaufeln proposed on the opposite side of the base plate of the fan blades.
  • At least one elevation is arc-shaped at least in regions, wherein it preferably bends away from the support member from the respective trailing edge to the respective leading edge.
  • At least one elevation at an angle of 45 to 90 hit the leading edge, preferably at an angle of 70 to 90.
  • At least one increase is formed by at least one wire.
  • At least one increase is at least partially welded onto the outer surface of the fan blade.
  • 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 regions, preferably arched, wherein in particular the focal point of the curvature lies on the side of the elevation facing the trailing edge, and / or at least one groove, preferably on the side facing the trailing edge, having.
  • At least one elevation on the side facing away from the direction of rotation of the impeller is at least partially sealed with the outer surface, preferably with silicone.
  • An inventive fan may be arranged in a cooking appliance.
  • the present invention is based on the surprising finding that elevations on the outer surfaces of fan blades on a base plate prevent the solid and / or liquid particles contained in recirculated air, in particular in the form of fat particles, from passing directly radially through the fan be redirected. Rather, solid and / or liquid particles that hit the outer surfaces of the Lüfterradschaufeln stopped at the increase and derived by the special geometry of the increase in the direction of the base plate. In the region of the base plate, the solid and / or liquid particles can then be released from the fan blades, without hitting devices that are arranged directly radially around the fan, such as a heater within a cooking appliance.
  • the solid and / or liquid particles from the fan blades are not directly on the fan radially surrounding devices, such as a heater dispensed, it prevents in particular fat particles can be burned on the heater, resulting in a reduction in food quality and an odor could lead.
  • the fan according to the invention in a surprising way that the efficiency of the fan is not significantly affected, since no major obstacles in the radial flow of the circulating air are arranged. Furthermore, the increases arranged on the outer sides of the fan blades can provide additional stability of the fan blades themselves.
  • FIG. 1 shows a perspective view of a fan according to the invention.
  • the figure shows a perspective view of an inventive fan 1, which is installed in a fan room of a cooking appliance partially shown to rotate in the direction of arrow A rotating air in the cooking chamber, which is partially separated from the fan room by a not shown air deflector.
  • the fan 1 has a base plate 2, on which a plurality of fan blades 3 are arranged, which are turned to the cooking chamber of the cooking appliance.
  • the Lüfterradschaufeln 3 are curved and arranged substantially perpendicular to the base plate 2 in order to form a substantially radial arrangement on the base plate 2.
  • Each fan blade 3 has a trailing edge 5 contacting the air to be circulated first during operation, and an outer surface 6 arranged on the pressure side of the fan wheel 1 during operation.
  • an elevation 7 is provided, which extends away from the base plate 2, substantially diagonally from a front edge 4 to the trailing edge 5 of the fan 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 may extend completely over the entire width of the Lüfterradschaufel 3, or have a distance from the base plate 2 opposite side of the Lüfterradschaufel 3, wherein this distance is preferably 5 to 15 mm.
  • a cover ring 8 is provided, which provides for an additional stabilization of the fan blades 3 within the fan 1.
  • the elevation 7 should extend from the outer surface 6 of the fan blade 3 lift off by 2 to 5 mm and end at the end facing the air flow on the trailing edge 5 of the Lüfterradschaufel 3 with a sharp edge to form a gutter for impinging solid and / or liquid particles, the further flow of solid and / or Liquid particles, beyond the increase 7, prevented, but causes a guide in the direction of the base plate 2.
  • a seal may be provided on the side lying in the flow shadow between the outer surface 6 and elevation 7.
  • This seal may be made, for example, with silicone, but any other seal may be provided which would be obvious to those skilled in the art.
  • the fan 1 is rotated in the fan chamber via a motor, not shown in the figure in the direction of arrow A and thus sucks air from the cooking chamber via a central opening in the air baffle centrally and directs them radially outwards, so that they outside of the fan room past air guide plates in the cooking chamber solids and / or liquid particles, in particular fat particles of different sizes, which reach in the region of the fan wheel 1, bounce on the outer surfaces 6 of the fan blades 3, on the pressure side of the fan, and are along the increase 7 derived in the direction of the base plate 2.
  • the solid and / or liquid particles reach the end region of the elevation 7 at the front edge 4 of the fan blade 3 (and finally the base plate 2), then the solid and / or liquid particles then released can not directly contact a device radially surrounding the fan wheel 1, such as in the form of a heater, not shown, or a heat exchanger, not shown, are discharged.
  • a device radially surrounding the fan wheel 1 such as in the form of a heater, not shown, or a heat exchanger, not shown, are discharged.
  • burning of the same is avoided, which can lead to an odor nuisance and to a negative influence on a cooking result.
  • the separated solid and / or liquid particles can be disposed of.
  • the impeller according to the invention in a cooking appliance thus prevents solids and / or liquid particles from being deposited, for example, directly on a heating device surrounding the impeller 1, and also ensures that air circulated by the impeller 1 can be diverted substantially completely radially the efficiency of the fan 1 is only slightly reduced by the increase 7.
  • the fan 1 is replaced by the elevations 7 itself a higher stability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP07003875A 2007-02-26 2007-02-26 Roue de ventilateur radiale Withdrawn EP1961966A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07003875A EP1961966A1 (fr) 2007-02-26 2007-02-26 Roue de ventilateur radiale
EP08151624A EP1961969A3 (fr) 2007-02-26 2008-02-19 Roue de ventilateur radiale
CNA2008101003800A CN101349281A (zh) 2007-02-26 2008-02-26 径向风机叶轮

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07003875A EP1961966A1 (fr) 2007-02-26 2007-02-26 Roue de ventilateur radiale

Publications (1)

Publication Number Publication Date
EP1961966A1 true EP1961966A1 (fr) 2008-08-27

Family

ID=38291297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07003875A Withdrawn EP1961966A1 (fr) 2007-02-26 2007-02-26 Roue de ventilateur radiale

Country Status (2)

Country Link
EP (1) EP1961966A1 (fr)
CN (1) CN101349281A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518858A (zh) * 2018-03-26 2018-09-11 烟台通天达风机制造有限公司 振荡生热高温热风机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE607157C (de) * 1932-10-19 1934-12-18 Schiele & Co G M B H G Fluegelrad zu Kreiselgeblaesen fuer die Befoerderung von Luft mit festen Bestandteile
US3104050A (en) * 1960-08-17 1963-09-17 Richard W Coward Blades for centrifugal fans and the like
DE1503650A1 (de) * 1965-12-23 1969-03-13 Meissen Turbowerke Ventilatorlaufrad zur Foerderung staubhaltiger Gase
DE2809597A1 (de) * 1978-03-06 1979-10-04 Konrad Reitz Maschinen U Appar Radial-ventilator
EP0372701A1 (fr) * 1988-12-06 1990-06-13 Johnston Engineering Limited Dispositifs de balayage des rues
US20060165528A1 (en) * 2002-08-22 2006-07-27 Elmar Junker Fan impeller with integrated precipitation of fat particles in particular for a cooking device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE607157C (de) * 1932-10-19 1934-12-18 Schiele & Co G M B H G Fluegelrad zu Kreiselgeblaesen fuer die Befoerderung von Luft mit festen Bestandteile
US3104050A (en) * 1960-08-17 1963-09-17 Richard W Coward Blades for centrifugal fans and the like
DE1503650A1 (de) * 1965-12-23 1969-03-13 Meissen Turbowerke Ventilatorlaufrad zur Foerderung staubhaltiger Gase
DE2809597A1 (de) * 1978-03-06 1979-10-04 Konrad Reitz Maschinen U Appar Radial-ventilator
EP0372701A1 (fr) * 1988-12-06 1990-06-13 Johnston Engineering Limited Dispositifs de balayage des rues
US20060165528A1 (en) * 2002-08-22 2006-07-27 Elmar Junker Fan impeller with integrated precipitation of fat particles in particular for a cooking device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518858A (zh) * 2018-03-26 2018-09-11 烟台通天达风机制造有限公司 振荡生热高温热风机
CN108518858B (zh) * 2018-03-26 2023-10-27 烟台通天达风机制造有限公司 振荡生热高温热风机

Also Published As

Publication number Publication date
CN101349281A (zh) 2009-01-21

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