EP2372163B1 - Roue de ventilateur - Google Patents

Roue de ventilateur Download PDF

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Publication number
EP2372163B1
EP2372163B1 EP10003653.2A EP10003653A EP2372163B1 EP 2372163 B1 EP2372163 B1 EP 2372163B1 EP 10003653 A EP10003653 A EP 10003653A EP 2372163 B1 EP2372163 B1 EP 2372163B1
Authority
EP
European Patent Office
Prior art keywords
fan impeller
fan
further characterized
base plate
reinforcing profiles
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.)
Active
Application number
EP10003653.2A
Other languages
German (de)
English (en)
Other versions
EP2372163A1 (fr
Inventor
Lutz Riefenstein
Stan Smits
Günther Wurdinger
Thomas Lang
Rainer Lammerskitten
Andreas Berchtenbreiter
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.)
Welbilt Deutschland GmbH
Original Assignee
Convotherm Elektrogeraete GmbH
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
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Application filed by Convotherm Elektrogeraete GmbH filed Critical Convotherm Elektrogeraete GmbH
Priority to EP10003653.2A priority Critical patent/EP2372163B1/fr
Priority to PCT/EP2011/001513 priority patent/WO2011120659A1/fr
Publication of EP2372163A1 publication Critical patent/EP2372163A1/fr
Application granted granted Critical
Publication of EP2372163B1 publication Critical patent/EP2372163B1/fr
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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
    • 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

Definitions

  • the invention relates to a fan according to the preamble of claim 1, which is particularly suitable for a commercial cooking appliance, such as a combi steamer.
  • Such a fan is from the EP 1 530 682 B1 or the priority application for this EP application DE 102 39 246 known.
  • the known fan wheel has fan blades, on the outer surface of which at least one elevation is arranged and / or formed which is spaced from a base plate of the fan wheel and extends away from the base plate, substantially diagonally from a leading edge to a trailing edge of the fan blades.
  • the DE 102 34 214 B4 teaches a cooking appliance with integrated grease separation, including a disc between a rear wall of the cooking chamber and the fan wheel is arranged, which is designed such that the arranged around the fan around heater is covered by the disc substantially completely opposite the rear wall.
  • a fan for a circulating radial fan of a cooking chamber which is provided with at least between some of its blades spaced from a support plate baffles, wherein the baffles with the support disk and the respective adjacent, radially arranged, straight blades a nozzle device for Generating a radially outwardly directed gas flow near the support disk.
  • a device for cooking chamber air conditioning in the form of a fan wheel which has a plurality of blade units, wherein each blade unit consists of at least two blades, which are referred to as a basic blade and cover blade and have a planar and / or spatially curved surface.
  • the primary bucket has at least one collecting profile which has a concave surface for collecting particulate matter in the centrifugal direction.
  • the cover blade can be positioned up to the base blade against the direction of rotation of the fan at a given distance.
  • Another fan which comprises a cover plate and a base plate, between which fan blades extend.
  • the fan blades are attached to the top plate via the plates.
  • the discharge device can fulfill both its basic function according to which it reliably removes impurities in the air conveyed to the heating device, and at the same time reinforces the entire structure of the fan impeller according to the invention, since it is designed as a reinforcing profile.
  • the discharge device or each of the fan blades associated reinforcement profile holds a radial distance to the outer edge of the fan blades, which also the advantageous effect that the reinforcing profiles of the discharge device can be formed as an air guide device, which derives the flow of air flowing from the fan blades and thus at least reduced turbulence of the exhaust air, so that the total air resistance is reduced.
  • This in turn has the advantageous effect that the drive power of the motor of the fan wheel can be reduced without reducing the performance of the fan wheel, which ultimately leads to significant energy savings.
  • the reinforcement profiles can also be used as retrofit parts for existing fan wheels, since the fan blades themselves do not need to be modified because the reinforcement profiles represent an independent part for the fan blades, which can also be subsequently integrated into existing fan wheel designs.
  • these are preferably arranged inclined at an angle to the fan longitudinal axis.
  • the inclination in the direction of the center and the base plate of the impeller that is, inside, made, in a further preferred embodiment, the outer edge of the fan blades parallel to the reinforcing profile, that is inclined at the same angle to the fan longitudinal axis, as the reinforcing profiles.
  • the reinforcing profiles can in principle accommodate different designs, in each case forming a channel whose length is determined by the distance between the base plate and the cover plate, since this channel extends from the base plate to the cover plate.
  • the reinforcing profiles are preferably designed to be favorable in terms of flow and may, in particular, have a teardrop shape or else a shape similar to an aircraft wing. Since all reinforcing profile embodiments are channel-shaped, all have one suitable opening for receiving the impurities flowing from the fan blades.
  • the discharge device is not formed or arranged on the fan blades, can be seen in the fact that they can be straight and preferably flat or can maintain their straight and preferably planar design and thus the Fan wheel reversible, that is operable in both directions of rotation, which is not possible in particular in the ventilation wheel according to the generic state of the art. Because there, as explained above, the discharge device is formed only on one of the two Lüfterradschaufel vom.
  • Fig. 1 From a synopsis of Fig. 1 to 3 initially results in the basic structure of a fan impeller 1 according to the invention for a commercial cooking appliance, in particular a combi steamer, which is not shown in the drawings.
  • the fan 1 has a plurality of fan blades, of which in the Fig. 2 adjacent fan blades with the reference numerals 2 and 3 representative of the other fan blades are identified.
  • the Lüfterradschaufeln 2, 3 are arranged radially around a Lüfterradstoffddling M on a base plate 4 on which they, for example by means of in Fig. 3 visible tabs 19 can be attached.
  • the fan 1 has twelve such fan blades, as is the case Fig. 1 results.
  • Fig. 2 shows that the Lüfterradschaufeln 2, 3 between the base plate 4 and a cover plate or a cover ring 5 are arranged.
  • Each of the fan blades 2, 3 has a first blade surface 6 and a second blade surface 7, which, for example, from the Fig. 1 and 3 results in pointing in opposite directions.
  • the air to be guided from the fan wheel 1 to a heating device impinges on these blade surfaces 6, 7.
  • the Lüfterradschaufeln 2, 3, as can be seen from the figures, are straight and preferably flat and at least substantially at right angles to the base plate 4 and the cover plate 5 are arranged.
  • the Lüfterradschaufeln 2, 3 further comprises an outer edge 8 and an inner edge 9. From the fan center M in the radial direction R (see Fig. 1 ), in this case has the outer edge 8 radially outward, while the inner edge 9 has radially inwardly to the center M.
  • the impeller 1 according to the invention is further provided with a discharge device 10, which serves to deposit impurities contained in the air conveyed by the impeller 1 or its impeller blades 2, 3.
  • These impurities are, in particular, fat or oil particles which emerge from the food during the cooking process and mix with the air conveyed by the fan 1. This can be prevented that these grease or oil particles or other contaminants on the surrounding the fan 1 not shown heater be thrown, said discharge device 10 is provided, which has a plurality of reinforcing profiles 10A, 10B, 10C in the illustrated example case.
  • Each of the fan blades 2, 3 provided is assigned a reinforcing profile 10A, 10B, 10C, so that in the exemplary case of twelve fan blades, twelve such reinforcing profiles are accordingly provided.
  • Fig. 1 shows three different training options for such reinforcing profiles, which are denoted by the backgroundssziffem 10A, 10B and 10C. It should be emphasized that Fig. 1 merely by way of example these three different gain profiles for ease of illustration on a fan 1 shows. In the actual embodiment of the impeller 1 per fan blade 2, 3 only one type of reinforcing profile, ie either the reinforcing profile 10A provided for all fan blades or the reinforcing profile 10B for all fan blades or the reinforcing profile 10C for all fan blades.
  • the reinforcing profile 10A is designed like an arrowhead in plan view.
  • the reinforcing profile 10B is a preferred embodiment in that it has a streamlined design in that the free end regions 12, 13 (see FIG Fig. 1 ) compared to the illustrated embodiment to improve the flow efficiency can still be formed bent towards each other.
  • the embodiment 10B represents, as it were, a representative of aerodynamic profiles, such as drop-shaped or wing-like profiles.
  • the reinforcing profile 10C is U-shaped.
  • All reinforcing profiles form channels, which, like Fig. 2 illustrated, extend from the base plate 4 to the cover plate 5.
  • the respectively supported on the base plate 4 end portion 18 of the reinforcing profiles 10A, 10B and 10C corresponds to recesses 14, 15, 16 and 17, which also exemplifies in Fig. 1 are clarified.
  • These recesses 14 to 17 represent the derivation of the particles collected in the respective reinforcing profile 10A, 10B, 10C, in particular the oil particles, it being ensured by the arrangement of the reinforcing profiles radially outside the outer edge 8 of the fan blades 2, 3 that the collected and derived particles can not impinge on the heater surrounding the fan.
  • the 3 and 4 illustrate here that between the outer edge 8 of each of the fan blades and the associated reinforcing profile, a radial distance A is maintained, which may be different depending on the application, but has a value greater than 0.
  • each of the reinforcing profiles 10A, 10B and 10C, respectively, is inclined at an angle ⁇ to the fan longitudinal center line L, which in FIG Fig. 3 symbolized by the cross L.
  • this longitudinal center line L is moved parallel to the outer region of the fan wheel 1 in order to better illustrate the inclination angle ⁇ .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (12)

  1. Roue de ventilateur (1)
    - avec une pluralité d'aubes (2, 3) de roue de ventilateur,
    • lesquelles sont agencées entre une plaque de base (4) et une plaque de recouvrement (5) de façon radiale autour d'un point central (M) d'une roue de ventilateur,
    • lesquelles comprennent des premières et des secondes surfaces d'aubes (6, 7) qui pointent dans des directions opposées, et
    • lesquelles comprennent un bord extérieur (8) tourné radialement vers l'extérieur et un bord intérieur (9) tourné radialement vers l'intérieur, observés à partir du point central de la roue de ventilateur (M) dans la direction radiale (R), et
    - avec un moyen déflecteur (10) pour les contaminants présents dans l'air débité par les aubes (2, 3) de la roue de ventilateur, comme, en particulier, des particules d'huile,
    - dans lesquelles le moyen déflecteur (10) est conçu comme un profilé de renforcement (10A, 10B, 10C), lequel est associé à chaque aube de roue de ventilateur (2, 3) et est agencé entre la plaque de base (4) et la plaque de recouvrement (5) pour maintenir une distance radiale (A) par rapport au bord extérieur (8) des aubes (2, 3) de roue de ventilateur, comme vus à partir du point central (M) de la roue de ventilateur dans la direction radiale (R), et
    - dans lesquelles les profilés de renforcement (10A, 10B, 10C) sont fixés à la plaque de base (4) et/ou à la plaque de recouvrement (5), et
    - dans lesquelles les profilés de renforcement (10A, 10B, 10C) sont sous forme de rainures, lesquelles s'étendent de la plaque de base (4) à la plaque de recouvrement (5).
  2. Roue de ventilateur selon la revendication 1, caractérisée en outre en ce que les profilés de renforcement (10A, 10B, 10C) sont agencés à un angle (α) par rapport à la ligne médiane longitudinale (L) de la roue de ventilateur.
  3. Roue de ventilateur selon la revendication 2, caractérisée en outre en ce que les profilés de renforcement (10A, 10B, 10C) sont inclinés vers l'intérieur dans la direction du point central (M) de la roue de ventilateur et la plaque de base (4).
  4. Roue de ventilateur selon la revendication 2 ou 3, caractérisée en outre en ce que les bords extérieurs (8) sont inclinés selon le même angle (α) par rapport à la ligne médiane longitudinale (L) de la roue de ventilateur.
  5. Roue de ventilateur selon l'une des revendications 1 à 4, caractérisée en outre en ce que les profilés de renforcement (10A, 10B, 10C) sont formés avec un écoulement favorable.
  6. Roue de ventilateur selon l'une des revendications 1 à 5, caractérisée en outre en ce que, observés dans la vue en plan, les profilés de renforcement (10A) présentent la forme d'une pointe de flèche.
  7. Roue de ventilateur selon l'une des revendications 1 à 5, caractérisée en outre en ce que, observés dans la vue en plan, les profilés de renforcement (10B) présentent la forme d'une gouttelette ou une forme similaire pour soutenir des poutres, dans lesquelles les régions d'extrémité libre (12, 13) des profilés de renforcement (10B) en forme de gouttelettes sont formés de manière à se faire face mutuellement.
  8. Roue de ventilateur selon l'une des revendications 1 à 5, caractérisée en outre en ce que les profilés de renforcement (10C) sont en forme de U.
  9. Roue de ventilateur selon l'une des revendications 1 à 8, caractérisée en outre en ce que des évidements d'écoulement (14, 15, 16, 17) qui correspondent à une région d'extrémité (18) des profilés de renforcement (10A, 10B, 10C) reposant sur la plaque de base (4) sont agencés dans la plaque de base (4).
  10. Roue de ventilateur selon l'une des revendications 1 à 9, caractérisée en outre en ce que les aubes (2, 3) de la roue de ventilateur sont de forme plane.
  11. Roue de ventilateur selon l'une des revendications 1 à 10, caractérisée en outre en ce que les aubes (2, 3) de la roue de ventilateur sont en forme de cône tronqué.
  12. Roue de ventilateur selon l'une des revendications 1 à 11, caractérisée en outre en ce que les aubes (2, 3) de la roue de ventilateur sont fixées sur la plaque de base (4) à l'aide d'un support (19).
EP10003653.2A 2010-04-01 2010-04-01 Roue de ventilateur Active EP2372163B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10003653.2A EP2372163B1 (fr) 2010-04-01 2010-04-01 Roue de ventilateur
PCT/EP2011/001513 WO2011120659A1 (fr) 2010-04-01 2011-03-25 Roue de ventilateur équipé de moyens déflecteurs pour les impuretés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10003653.2A EP2372163B1 (fr) 2010-04-01 2010-04-01 Roue de ventilateur

Publications (2)

Publication Number Publication Date
EP2372163A1 EP2372163A1 (fr) 2011-10-05
EP2372163B1 true EP2372163B1 (fr) 2014-10-08

Family

ID=42575763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10003653.2A Active EP2372163B1 (fr) 2010-04-01 2010-04-01 Roue de ventilateur

Country Status (2)

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EP (1) EP2372163B1 (fr)
WO (1) WO2011120659A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017203539A1 (de) * 2017-03-03 2018-09-06 Convotherm-Elektrogeräte Gmbh Lüfterrad
DE102017203526A1 (de) 2017-03-03 2018-09-06 Convotherm-Elektrogeräte Gmbh Lüfterrad
WO2018158226A1 (fr) * 2017-03-03 2018-09-07 Convotherm-Elektrogeräte Gmbh Roue de ventilateur
CN111550436B (zh) * 2019-02-12 2022-08-12 日本电产株式会社 叶轮和具有该叶轮的离心风扇

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1058690A (fr) * 1951-07-21 1954-03-18 Babcock & Wilcox France Roue pour machine soufflante radiale

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1058628A (fr) * 1951-07-21 1954-03-17 Babcock & Wilcox France Machine soufflante pour fluides gazeux chargés de poussières
DE4307405C1 (de) 1993-03-09 1994-11-17 Rational Gmbh Lüfterrad
DE10234214B4 (de) 2002-07-22 2006-02-23 Markus Salamon Verfahren zum Bereitstellen von Informationen auf einer mobilen elektronischen Einheit
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
DE102005047457A1 (de) * 2004-10-01 2006-04-13 Wss Gmbh Vorrichtung zur Garraum-Klimareinigung in Form eines Lüfterrades

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1058690A (fr) * 1951-07-21 1954-03-18 Babcock & Wilcox France Roue pour machine soufflante radiale

Also Published As

Publication number Publication date
WO2011120659A1 (fr) 2011-10-06
EP2372163A1 (fr) 2011-10-05

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