EP2522858B1 - Ventilateur centrifuge pour hottes - Google Patents

Ventilateur centrifuge pour hottes Download PDF

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Publication number
EP2522858B1
EP2522858B1 EP12166751.3A EP12166751A EP2522858B1 EP 2522858 B1 EP2522858 B1 EP 2522858B1 EP 12166751 A EP12166751 A EP 12166751A EP 2522858 B1 EP2522858 B1 EP 2522858B1
Authority
EP
European Patent Office
Prior art keywords
delivery unit
radial fan
additional delivery
collar
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.)
Active
Application number
EP12166751.3A
Other languages
German (de)
English (en)
Other versions
EP2522858A3 (fr
EP2522858A2 (fr
Inventor
Josef Wurm
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete 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
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2522858A2 publication Critical patent/EP2522858A2/fr
Publication of EP2522858A3 publication Critical patent/EP2522858A3/fr
Application granted granted Critical
Publication of EP2522858B1 publication Critical patent/EP2522858B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/162—Double suction pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/025—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal comprising axial flow and radial flow stages
    • 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 radial fan wheel according to the preamble of patent claim 1 and a household appliance according to the preamble of patent claim 7.
  • a cooking appliance has a fan unit which comprises at least one motor arranged in an engine compartment. At least one fan arranged in the cooking chamber can be driven via this with a drive shaft guided through a partition wall.
  • the blower unit has an additional delivery unit for generating a gas pressure that seals the engine compartment against vapor.
  • a two-stage blower for a hand dryer is known.
  • an axially sucking in and radial blowing out drum rotor is combined with an axially conveying impeller.
  • the JP 51 036 111 U shows a radial fan wheel with an upstream pulley, the spokes of which are designed like wings, causing an air flow in the axial direction.
  • the US 2011/079374 A1 discloses a heat dissipation system for electronic components.
  • the system includes a housing which is divided into first and second air ducts by a partition wall.
  • a drive unit is mounted in the first air duct.
  • a rotating axle of the drive unit extends through an opening in the second air duct.
  • a first impeller is mounted in the first air duct and a second impeller is mounted in the second air duct.
  • the invention is based on the object of improving the mode of operation of the radial fan wheel from the prior art.
  • the additional conveyor unit is surrounded by an annular collar, the collar being arranged on the separating plate, and wherein the additional conveyor unit is an axial additional conveyor unit and the air blades of the additional conveyor unit are arranged within the collar.
  • the air blades of the additional delivery unit result in an improved delivery rate, which is also easy to control thanks to the geometric design of the air blades.
  • the entire volume of air sucked in by the additional delivery unit is preferably delivered radially outward via the main delivery unit.
  • the additional conveying unit is surrounded by an annular collar, which, due to the stiffening effect of the collar, creates a stable radial fan wheel that has low-vibration running properties.
  • the collar is arranged on the partition plate. This enables a compact design and also favors the design of the radial fan wheel as a plastic injection-molded part.
  • the air blades of the additional delivery unit generate an air flow along an axis of rotation of the fan wheel.
  • a blow-out area of the additional delivery unit opens in the suction area of the main delivery unit.
  • the air blades of the additional delivery unit are at least partially arranged in an opening in the partition plate. This enables a particularly flat design of the radial fan wheel, especially when the additional delivery unit does not protrude, or only protrudes slightly, over the partition plate. An air throughput of the additional delivery unit can be controlled via the cross section of the opening.
  • the additional delivery unit is arranged within an opening delimited by the collar. This creates a defined, clearly delimited flow channel of the additional delivery unit. This flow channel can easily be coupled to adjacent flow channels with sufficient tightness.
  • the collar has a height of 2 to 10 mm, preferably 3 to 8 mm. This enables a compact design of the radial fan wheel and, moreover, ensures sufficient coverage in the event of the collar dipping into an adjacent air duct. This Covering or overlapping creates a seal and largely prevents the sucking in of defective air.
  • the air blades of the additional delivery unit form a mechanical connection between a drive axle receptacle arranged along the central axis and the partition plate enables material to be saved in the manufacture of the radial fan wheel.
  • the air blades preferably form the sole mechanical connection between the drive axle receptacle and the partition plate.
  • the air blades are arranged in two superposed planes, whereby the air throughput is increased again. In addition, this enables a more stable connection of the drive axle receptacle to the partition plate.
  • the invention also relates to a domestic appliance with a radial fan wheel according to the invention, the collar of which is immersed in an intake duct.
  • Coupling between the radial fan wheel and the intake duct of the household appliance enables a particularly tight interface to be achieved.
  • the separating plate of the radial fan wheel has a certain distortion due to the manufacturing process, or a certain flatness tolerance.
  • the formation of a collar which dips into the suction hole or into the suction channel, prevents such a suction of defective air.
  • the radial fan wheel in Figure 1 has a partition plate 2, in the center of which a drive axle receptacle 4 is arranged. This is designed in the form of a sleeve and serves to accommodate a motor axis of a fan motor (not shown). To accommodate the motor shaft, the drive shaft receptacle 4 has a receptacle opening 5 into which the motor shaft (not shown) is inserted.
  • the drive axle receptacle 4 is connected to the partition plate 2 via four holding webs 6.
  • a main delivery unit 8 in the form of air blades 10 is arranged on the partition plate 2. The air blades 10 of the main conveyor unit 8 extend from an outer circumference of the partition plate 2 radially inward in the direction of the drive axle receptacle 4.
  • the air blades 10 of the main conveyor unit 8 are arcuate and have a height H.
  • the air blades 10 end in front of a circular opening 11, which is arranged in the middle of the partition plate 2 is and in the center of which the drive axle receptacle 4 forms.
  • the opening 11 has an additional delivery unit 12 which is formed by four air blades 14.
  • the air blades 14 are designed in such a way that they cause an air flow in the direction of an axis 18.
  • the axis 18 forms the axis of rotation of the drive axis receptacle or the entire radial fan wheel.
  • Figure 2 shows a collar 16 formed on an underside of the radial fan wheel, the inner diameter of which corresponds to the diameter of the opening 11.
  • the air blades 14 of the additional delivery unit 12 are arranged inside the collar 16. In addition, they are each arranged centrally along an angle bisector in intermediate spaces 17 formed by the holding webs 6. In accordance with the stability requirements, it is also possible in an alternative embodiment (not shown) to also design the retaining webs 6 in the form of air blades 14.
  • the additional delivery unit 12 is thus composed of two rows of air blades 14 which are arranged at a distance from one another in the axial direction with respect to the axis 18.
  • the two rows of air blades 14 are arranged offset from one another in such a way that the resulting gaps between the air blades 14 are of equal size.
  • the air blades 14 of the additional delivery unit 12 are inclined in the direction of the axis 18 in such a way that they cause an air flow along the axis 18.
  • the representation in Figure 3 shows schematically the radial fan wheel built into a cooking appliance.
  • the radial fan wheel serves to generate a cooling air flow LK, which is used to cool a switch area of the cooking appliance (not shown).
  • the radial fan wheel through its additional delivery unit 12, removes vapors from an oven muffle 19 of the cooking appliance, which is surrounded by insulation 23.
  • the extracted vapor is mixed with the cooling air flow LK.
  • the cooling air flow LK is formed via a suction area AH of the main conveyor unit 8 arranged at the top and is conveyed radially outward into a blow-out area A via the main conveyor unit 8.
  • the circular suction area AH of the main conveyor unit 8 is arranged centrally above the main conveyor unit 8.
  • the axis 18 forms the center of the suction area AH.
  • a vapor air flow LW is additionally sucked in via a suction area AZ of the additional delivery unit 12.
  • the vapor air flow LW is conveyed by means of the air blades 14 of the additional conveyor unit 12 to the main conveyor unit 8 arranged above the partition plate 2.
  • the vapor air flow LW from the suction area AZ of the additional conveyor unit 12 and the cooling air flow LK result in a mixed air flow LM which is conveyed via the blow-out area A into a blow-out duct 22.
  • a gap S between the partition plate 2 and a cover plate 20 arranged on the insulation 23 can be chosen generously, since the collar 16 is designed in such a way that it dips into the intake duct 21 and thereby largely prevents the sucking in of defective air via the gap S.

Landscapes

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

Claims (8)

  1. Roue de ventilateur radial pour appareil électroménager, en particulier pour un appareil de cuisson, comprenant une unité de transport principale (8) et une unité de transport additionnelle (12), qui comprennent des zones d'aspiration (AH, AZ) séparées respectivement l'une de l'autre spatialement par une plaque de séparation (2), dans laquelle l'unité de transport principale (8) est agencée pour acheminer radialement vers l'extérieur l'air aspiré à partir des zones d'aspiration (AH, AZ), et dans laquelle l'unité de transport additionnelle (12) comprend des pales (14), caractérisée en ce que l'unité de transport additionnelle (12) est entourée par une collerette annulaire (16) et la collerette (16) est disposée sur la plaque de séparation (2), dans laquelle l'unité de transport additionnelle (12) est une unité de transport additionnelle axiale et les pales (14) de l'unité de transport additionnelle (12) sont disposées à l'intérieur de la collerette (16).
  2. Roue de ventilateur radial selon la revendication 1, caractérisée en ce que les pales (14) de l'unité de transport additionnelle (12) produisent un courant d'air (LW) le long d'un axe de rotation (18) de la roue de ventilateur.
  3. Roue de ventilateur radial selon la revendication 1 ou 2, caractérisée en ce que les pales (14) de l'unité de transport additionnelle (12) sont disposées au moins en partie dans un orifice (11) de la plaque de séparation (2).
  4. Roue de ventilateur radial selon l'une des revendications précédentes, caractérisée en ce que l'unité de transport additionnelle (12) est disposée à l'intérieur d'un orifice (11) délimité par la collerette (16).
  5. Roue de ventilateur radial selon l'une des revendications précédentes, caractérisée en ce que la collerette (16) a une hauteur de 2 à 10 mm, de préférence de 3 à 8 mm.
  6. Roue de ventilateur radial selon l'une des revendications précédentes, caractérisée en ce que les pales (14) de l'unité de transport additionnelle (12) forment une liaison mécanique entre un logement d'axe d'entraînement (4) disposé le long d'un axe médian (18) et la plaque de séparation (2).
  7. Appareil électroménager, en particulier appareil de cuisson comprenant une roue de ventilateur radial selon l'une des revendications précédentes.
  8. Appareil électroménager, en particulier appareil de cuisson selon la revendication 7, comprenant une roue de ventilateur radial selon la revendication 4, caractérisé en ce que la collerette (16) s'enfonce dans un canal d'aspiration (21).
EP12166751.3A 2011-05-11 2012-05-04 Ventilateur centrifuge pour hottes Active EP2522858B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011075628A DE102011075628A1 (de) 2011-05-11 2011-05-11 Radiallüfterrad und Haushaltsgerät mit einem Radiallüfterrad

Publications (3)

Publication Number Publication Date
EP2522858A2 EP2522858A2 (fr) 2012-11-14
EP2522858A3 EP2522858A3 (fr) 2017-07-19
EP2522858B1 true EP2522858B1 (fr) 2020-10-21

Family

ID=46177230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12166751.3A Active EP2522858B1 (fr) 2011-05-11 2012-05-04 Ventilateur centrifuge pour hottes

Country Status (2)

Country Link
EP (1) EP2522858B1 (fr)
DE (1) DE102011075628A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1805121A1 (de) * 1968-10-25 1970-05-21 Siemens Ag Zweistufiges Geblaese
JPS5136111U (fr) * 1974-09-11 1976-03-17
DE10152733A1 (de) 2001-10-25 2003-05-08 Bsh Bosch Siemens Hausgeraete Gargerät mit einer Gebläseeinheit
US8821227B2 (en) * 2009-10-07 2014-09-02 Sunonwealth Electric Machine Industry Co., Ltd. Heat dissipating system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102011075628A1 (de) 2012-11-15
EP2522858A3 (fr) 2017-07-19
EP2522858A2 (fr) 2012-11-14

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