EP2738394A1 - Boîtier pour un ventilateur radial et ventilateur radial - Google Patents

Boîtier pour un ventilateur radial et ventilateur radial Download PDF

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Publication number
EP2738394A1
EP2738394A1 EP13193429.1A EP13193429A EP2738394A1 EP 2738394 A1 EP2738394 A1 EP 2738394A1 EP 13193429 A EP13193429 A EP 13193429A EP 2738394 A1 EP2738394 A1 EP 2738394A1
Authority
EP
European Patent Office
Prior art keywords
housing
radial
wall portion
air
radial fan
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Withdrawn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
EP13193429.1A
Other languages
German (de)
English (en)
Inventor
Wolf-Dietrich Frenz
Thomas Nawrot
Steffi Richter
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 Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2738394A1 publication Critical patent/EP2738394A1/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Withdrawn legal-status Critical Current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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the present invention is in the field of radial blowers for household appliances, and particularly laundry treating appliances, and relates to a housing for a radial fan having an inner wall portion on an air inlet side of a radial fan wheel rotatably supported in the housing about an axis of rotation facing the radial fan wheel.
  • Such a housing and a radial fan are out of the EP 1 637 643 A2 known, which describes a clothes dryer with a fan having a fan housing.
  • the blower housing serves for air flow guidance around a radial blower wheel (impeller) mounted rotatably in the housing, which draws in incoming air in the central wheel area and conveys it out of the housing out of a radial outflow opening.
  • From the EP 0 702 105 B1 is a household appliance known in which a radial impeller is rotatably mounted in a spiral housing and the air to be supplied flows axially.
  • the blower housing can be used in particular in a blower for a tumble dryer.
  • the EP 1 990 465 A1 relates to an air duct of a tumble dryer, which supplies air to a radial fan, wherein a displacement body is arranged as a noise-reducing measure in an air-stromumlenkenden section of the air duct.
  • the DE 199 18 085 A1 a blower for conveying process air in a tumble dryer with a spiral housing, in which a rotor is mounted with circumferentially distributed blades and a concentric suction port.
  • the suction opening is surrounded by a cover disc which is connected on one side to the blades, wherein the side of each blade facing the cover disk extends in a curved manner in a specific way for improving the efficiency and reducing noise.
  • a radial fan and a radial fan also referred to as a centrifugal fan, centrifugal fan or drum rotor blower
  • the inner wall portion is inclined relative to a plane of the radial impeller, which is perpendicular to the axis of rotation.
  • the inner wall portion which limits in particular a part of an inner air space of the radial fan housing, inclined or tilted to the plane perpendicular to the axis of rotation of the Radialgebläserades arranged or oriented, an optimized flow of the conveyed air is realized , whereby an overall energy efficiency increase and a noise reduction can be achieved.
  • This can have a positive effect on customer satisfaction, especially in times of increasing energy costs and growing awareness of resources.
  • the inclined inner wall area hereinafter also referred to as a spiral floor, in particular inclined spiral floor
  • the inclined inner wall region can in particular serve as an optimized flow guide for air, which enters the fan at the air inlet side and is accelerated radially outwards by the radial fan wheel, in order then to leave the radial fan at an air outlet opening. It can come within the interior of the radial fan housing to a so-called secondary recirculation in the Radialgebläserad (also referred to as impeller or drum rotor), which can be reduced by the inclined arranged inner wall area. Due to this orientation or arrangement of the inner wall region, interfering vortex generators ("bottleneck") and disturbing three-dimensionally directed flow filaments close to the housing can be reduced or eliminated altogether. In addition to a reduction of a secondary recirculation of the inclined inner wall region arranged can also lead to an optimized flow guidance of the exiting air, which leaves the radial fan housing through the air outlet opening.
  • the inner wall portion is inclined so as to axially restrict an inner air space of the housing so that the axial extent of the air space in the area (particularly along a circumferential direction perpendicular to the axial direction and perpendicular to the radial direction) of an air outlet opening is minimum is.
  • the "axial direction” is understood as a direction parallel to the axis of rotation of the radial impeller, the radial direction is to be understood as a direction perpendicular to the axial direction.
  • the radial impeller may rotate about the axis of rotation and includes air vanes for accelerating the air in the radial direction.
  • the air outlet opening can be located in particular in a peripheral boundary wall of the radial fan housing.
  • the inner wall area forms (also) part of a transition to the air outlet opening.
  • the inner wall region preferably has an extension in the circumferential position region on, on which an air outlet opening is located.
  • the preferred funnel-shaped extension of the inner wall region may comprise a structure which extends in the tangential direction (perpendicular to the axial direction and perpendicular to the radial direction) and expands or expands in an extension perpendicular to the tangential direction (along the tangential direction) enlarged.
  • the funnel-shaped enlargement may in particular be trumpet-shaped or cone-shaped.
  • the inner wall area may extend tangentially beyond an air outlet area of the radial fan in order to advantageously guide the air emerging from the radial fan to a subsequent air line or a guide system and thus to reduce the flow resistance.
  • the inner wall area is at least partially planar.
  • a (partially) planar or planar formation of the inner wall region an advantageous flow of the air accelerated by the radial impeller along the inner wall region can be ensured while reducing the flow resistance.
  • the inner wall area which according to a particularly preferred embodiment of the invention can be designed, in particular, as an insert for an existing fan housing, can also be simple to manufacture.
  • the inner wall region at least partially has a ring shape with an approximately circular free space, through which an air inlet is made possible.
  • the ring shape can enclose an air inlet region of the radial fan.
  • the inner wall portion can be used in conventional radial blowers, which allow air to enter in the axial direction, ie along or parallel to the axis of rotation of the radial impeller, and which often allow an axially directed air flow into the fan through a circular opening cross section. Due to the inclined orientation of the inner wall region, the ring shape and / or the free space can deviate from an exact circular shape and instead have in particular an elliptical shape. In particular, the ring shape and / or the clearance, when projected along the axial direction, can give a circular shape.
  • the inner wall portion in a peripheral portion of the ring has a recess or bulge to avoid a collision with the Radialgebläserad.
  • the bulge of the inner wall region can - seen from the interior of the radial fan housing - have a curved or curved, in particular concave shape.
  • the bulge may extend over a portion of the circumference, e.g. over an angular range of about 50 ° to 120 °.
  • the bulge may taper at the boundaries of the portion and / or increase in radial extent from a peripheral boundary to a maximum, and then decrease in their radial extent again to another peripheral boundary. In this way, obstruction of the inner wall region can also be achieved in cramped conditions in that the bulge in the assembled state of the radial fan housing or the radial fan provides an increased clearance for receiving and rotating the radial fan wheel due to the bulge.
  • the protrusion is limited in projection by a crescent-shaped edge.
  • the crescent-shaped edge may in particular comprise a radially inner edge and a radially outer edge, between which the inner wall region is located axially further downstream (seen in the direction of an air inlet), ie. has a bulge, as in areas of the inner wall portion outside the bulge.
  • a radial fan wheel space can be made available within the radial fan housing in an advantageous manner.
  • the radial fan housing on an outer annular, in particular (viewed in the direction of inflowing air) convex wall portion on the air inlet side, which tapers in the direction of the air inlet direction from a first axial position to a second axial position in its radial extent wherein the inner wall portion is inclined so as to extend in a space region bounded axially by the first axial position, and more particularly at least approximately by the second axial position.
  • the outer annular wall portion may restrict an air inlet area for entry of air in the axial direction.
  • the outer wall portion may constitute or form part of an outer surface of the radial fan housing.
  • the second axial position may be seen in the direction of the incoming air downstream of the first axial position be arranged.
  • the inner wall portion can be used in a conventional radial fan case because it is inclined so as to be compatible with a conventional air inlet wall portion.
  • the outer annular wall portion may be funnel-shaped to allow a streamlined air inlet.
  • the inner wall portion is formed by a separate part and formed fastened to at least one further wall portion, in particular in the circumferential direction, of the housing.
  • the inner wall area can also be retrofitted in a (conventional) radial blower housing, so as to retrofit in a simple manner a conventional radial blower housing to increase energy efficiency and performance and to reduce noise pollution.
  • the radial fan housing may have a spiral shape, wherein the inner wall portion has a shape of a projection of a spiral shape.
  • the spiral shape (which in projection may have a similarity to a schematized post horn) can allow a favorable flow of the air, in particular in the exit region.
  • the inner wall portion may allow an improvement of the flow characteristic both in the part of the inner space located near the impeller blades of the radial impeller and in the space portions adjacent to the air exhaust opening, thus also positively influencing the flow of the air further downstream be able to have located components.
  • the radial fan housing further comprises a particular connected to the air outlet opening air outlet duct, which at a radial position has a minimum inner dimension in the axial direction (of the housing), wherein the inner wall portion is inclined such that an extension of the inclined wall portion axially within a range that is at most 1.5 times to 2.5 times the minimum inner dimension of the air exhaust duct.
  • the air outlet duct may in fact have a narrowest point (with respect to an internal extent) owing to a limited installation space, which presents an increased resistance to an air flow. Due to the inclination of the inner wall region, however, air leakage in an optimized manner be directed to this narrowed point of the air outlet conduit, so as to achieve a favorable outflow, which can reduce noise, performance-enhancing and energy consumption reducing effect.
  • the present invention also provides a domestic appliance, in particular a dryer or washer-dryer, with a radial blower housing or according to one of the embodiments described above.
  • FIG. 1 shows a schematic cross-sectional view of a radial fan 100 with a radial fan housing 101.
  • the radial fan 100 has a radial impeller 103, which can rotate driven by a shaft 105 and having paddle wheels 107. These are configured to suck air 108 along an axial direction 109 and accelerate the air 108 in a radial direction 111.
  • a peripheral region 112 which in the sectional plane of the Fig. 1 is located, the thus accelerated air 108 passes through an air outlet opening 113 and an air outlet conduit 115 out of the housing 101.
  • the air 108 then passes to its further (not shown) use, eg for drying laundry, in a laundry drum.
  • the housing 101 has an outer annular wall region 117, which lies on the air inlet side or the air inlet region 118 of the housing 101.
  • the wall portion 117 extends from a first axial position 119 to a second axial position 121 and tapers from a first radial extent 123 to a second radial extent 125. Because of this funnel-shaped shape or taper of the cross-section of the free air inlet area 118 is a flow-optimized inflow of air along the axial direction 109 allows.
  • an inner wall portion 127 (fan bottom, in particular fan intermediate bottom) (the dotted section lies behind the outer wall 117), which is opposite to a plane 129 which is perpendicular to the axis of rotation 105 of the radial fan 103, is inclined by an angle ⁇ , which is particularly preferably between 5 ° and 30 °.
  • an inner air space 131 of the radial fan housing 101 axially limited, depending on the circumferential position between the first axial position 119 and a third axial position 133 and between the second axial position 121 and the third axial position 133.
  • the air outlet duct 115 is connected to the air outlet opening 113 and has a minimum internal dimension 137 in the axial direction measured at a radial position 135.
  • the inner wall area 127 is inclined at an angle ⁇ relative to the plane 129 such that an imaginary extension of the inclined wall area towards the radial position 135 (intersection point 140) is within a range which is at most about 1.5 times to 2.5 times the minimum inner dimension 137 of the air outlet conduit 115.
  • the point of intersection 140 has an axial distance, which is between 1.5 times and 2.5 times half the minimum inner dimension 137 of the air outlet conduit 115, from the axial center 138 of the air outlet duct 115 at the radial position 135.
  • the inner wall region 127 has, close to the blade wheels 107 of the radial fan wheel 103, in particular towards the outlet opening 113, an outward bulge 139 in order to avoid a collision with the radial fan wheel 103 or its blades 107.
  • FIGS. 2A, 2B and 2C show steps of a manufacturing method for manufacturing a radial blower housing 201 according to an embodiment of the present invention, wherein the view in the axial direction 209 (ie with respect to Fig. 1 rotated by 90 °) takes place.
  • FIG. 2A illustrates, seen from the inside, the outer wall portion 217 of the spiral blower housing having an air inlet area 218 and a funnel-shaped extension at the exit opening 213.
  • a circular clearance (opening) 241 is provided for entry of air along the axial direction 209.
  • FIG. 2B illustrates the inner wall portion 227, which has an extension 228 in the peripheral region 212 in which the air outlet opening 213 is located.
  • the inner wall portion 227 is partially planar and has a nearly circular ring shape, but with a bulge 239, which is radially bounded by a respective crescent-shaped edge 243, 245 inside and outside.
  • Figure 2C shows the state in which the inner wall portion 227, which in FIG. 2B is separately illustrated, and the outer wall portion 217 (FIG. FIG. 2A ) (or a conventional radial blower housing) were assembled. As a result, an improvement in the performance characteristics of a conventional radial fan housing is possible.
  • FIG. 3 illustrates in a partially broken away perspective view a radial fan housing 301 according to an embodiment of the present invention.
  • the axial direction is designated by 309 and the radial direction by 311.
  • the outer wall portion 317 circularly defines an air inlet portion 318 which coincides with a clearance 341 recessed from the inner wall portion 327.
  • the inner wall portion 327 has a bulge 339, which is bounded by the crescent-shaped edges 343, 345.
  • the inner wall portion 327 is inclined relative to a plane 329 perpendicular to a rotation axis (parallel to the direction 309) by the angle ⁇ . In an exit region 313, accelerated air can escape through an unillustrated radial impeller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP13193429.1A 2012-11-29 2013-11-19 Boîtier pour un ventilateur radial et ventilateur radial Withdrawn EP2738394A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012221916.1A DE102012221916A1 (de) 2012-11-29 2012-11-29 Gehäuse für ein Radialgebläse und Radialgebläse

Publications (1)

Publication Number Publication Date
EP2738394A1 true EP2738394A1 (fr) 2014-06-04

Family

ID=49641549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13193429.1A Withdrawn EP2738394A1 (fr) 2012-11-29 2013-11-19 Boîtier pour un ventilateur radial et ventilateur radial

Country Status (2)

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EP (1) EP2738394A1 (fr)
DE (1) DE102012221916A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213470A1 (de) 2015-07-17 2017-01-19 Wilhelm Bruckbauer Lüfterbaustein
EP4184064A1 (fr) * 2021-11-19 2023-05-24 B.S. Service S.r.l. Unité d'extraction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10907655B2 (en) * 2016-12-20 2021-02-02 Mitsubishi Electric Corporation Multiblade fan

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07224796A (ja) * 1994-02-07 1995-08-22 Nippondenso Co Ltd 遠心多翼送風機
EP0702105A1 (fr) * 1994-09-13 1996-03-20 Bosch-Siemens HausgerÀ¤te GmbH Carter de ventilateur d'un appareil domestique, en particulier d'une sèche linge
US5601400A (en) * 1994-09-16 1997-02-11 Nippondenso Co., Ltd. Centrifugal blower improved to reduce vibration and noise
DE19918085A1 (de) 1999-04-21 2000-10-26 Bsh Bosch Siemens Hausgeraete Gebläse mit einem Spiralgehäuse
EP1637643A2 (fr) 2004-09-06 2006-03-22 Samsung Electronics Co., Ltd. Sèche-linge
EP1990465A1 (fr) 2007-05-07 2008-11-12 MIELE & CIE. KG Sèche-linge doté d'un canal d'aération
US20120009059A1 (en) * 2009-05-27 2012-01-12 Mitsubishi Electric Corporation Multiblade fan
DE202010016847U1 (de) * 2010-12-22 2012-03-23 Ebm-Papst Mulfingen Gmbh & Co. Kg Lüfteranordnung und deren Anströmkanal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19849836C1 (de) * 1998-10-29 1999-10-21 Webasto Thermosysteme Gmbh Ringkanalgebläse und Verfahren zur Montage eines solchen
DE102008056106B4 (de) * 2008-11-06 2011-02-17 Pierburg Gmbh Seitenkanalgebläse, insbesondere Sekundärluftgebläse für eine Verbrennungskraftmaschine
DE102009033773A1 (de) * 2009-07-17 2011-01-20 Behr Gmbh & Co. Kg Radiallüftergehäuse
DE202010008657U1 (de) * 2010-09-29 2010-12-02 Konz Lufttechnik Gmbh Ventilatoreinheit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07224796A (ja) * 1994-02-07 1995-08-22 Nippondenso Co Ltd 遠心多翼送風機
EP0702105A1 (fr) * 1994-09-13 1996-03-20 Bosch-Siemens HausgerÀ¤te GmbH Carter de ventilateur d'un appareil domestique, en particulier d'une sèche linge
EP0702105B1 (fr) 1994-09-13 1998-09-30 BSH Bosch und Siemens Hausgeräte GmbH Carter de ventilateur d'un appareil domestique, en particulier d'une sèche linge
US5601400A (en) * 1994-09-16 1997-02-11 Nippondenso Co., Ltd. Centrifugal blower improved to reduce vibration and noise
DE19918085A1 (de) 1999-04-21 2000-10-26 Bsh Bosch Siemens Hausgeraete Gebläse mit einem Spiralgehäuse
EP1637643A2 (fr) 2004-09-06 2006-03-22 Samsung Electronics Co., Ltd. Sèche-linge
EP1990465A1 (fr) 2007-05-07 2008-11-12 MIELE & CIE. KG Sèche-linge doté d'un canal d'aération
US20120009059A1 (en) * 2009-05-27 2012-01-12 Mitsubishi Electric Corporation Multiblade fan
DE202010016847U1 (de) * 2010-12-22 2012-03-23 Ebm-Papst Mulfingen Gmbh & Co. Kg Lüfteranordnung und deren Anströmkanal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213470A1 (de) 2015-07-17 2017-01-19 Wilhelm Bruckbauer Lüfterbaustein
EP4184064A1 (fr) * 2021-11-19 2023-05-24 B.S. Service S.r.l. Unité d'extraction

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Publication number Publication date
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