EP0261490B1 - Radial fan - Google Patents

Radial fan Download PDF

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Publication number
EP0261490B1
EP0261490B1 EP87113062A EP87113062A EP0261490B1 EP 0261490 B1 EP0261490 B1 EP 0261490B1 EP 87113062 A EP87113062 A EP 87113062A EP 87113062 A EP87113062 A EP 87113062A EP 0261490 B1 EP0261490 B1 EP 0261490B1
Authority
EP
European Patent Office
Prior art keywords
fan
spokes
radial
impeller
shaft
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.)
Revoked
Application number
EP87113062A
Other languages
German (de)
French (fr)
Other versions
EP0261490A1 (en
Inventor
Heinrich Dipl.-Ing. Kirchner
Udo Dr. Winter
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.)
Siemens AG
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6309954&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0261490(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0261490A1 publication Critical patent/EP0261490A1/en
Application granted granted Critical
Publication of EP0261490B1 publication Critical patent/EP0261490B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans

Definitions

  • the invention relates to a radial fan according to the preamble of claim 1; such a centrifugal fan is known from US-PS 2 275 564.
  • a centrifugal fan of the generic type is to be created which can be manufactured as a light mass product, in particular for use as a motor vehicle fan, with little effort and yet has only a low operating noise.
  • the radial fan according to the invention allows on the one hand, through its perforated spoke planes of the fan wheels, an air distribution distribution of the air flow sucked in on both end faces of each fan wheel over the entire axial outlet width of each fan blade ring and, on the other hand, in the simplest manufacture as a one-piece, injection-molded, light plastic part, a low fan operating noise, since that Compensate operating noise, resulting from the interaction of the two fan wheels, by the mutual phase shift and thus cannot have an unfavorable effect.
  • FIG. 1 shows the axial top view of the fan wheel drive arrangement of a radial fan provided for heating or air conditioning systems of motor vehicles.
  • a first fan wheel 2 is fixedly mounted on the right motor shaft end of a commutator motor 1 and a second fan wheel 3 is fixedly mounted on the left motor shaft end of the commutator motor 1.
  • the motor shaft thus simultaneously serves as a fan shaft 4.
  • Both fan wheels 2 and 3 are surrounded by a spiral housing as an air duct housing in a manner which is not shown here but is generally known.
  • the armature winding of the permanent magnet-excited commutator motor 1 is fed from an electrical supply line 13 via brush holders 11, 12.
  • FIGS. 2 and 3 each show in a field the top view of the axially outer end face of the fan wheels 2 and 3, which are injection-molded in one piece from plastic as identical unit components.
  • Each fan wheel 2, 3 has a hub 26 or 36 for fastening the fan wheel on the fan shaft 4, a fan blade ring 21 or 31 and for connection between the hub 4 and the fan blade ring 21 or 31, which are held at a radial distance, four each in a spoke plane Spokes 22-25 and 32-35 lying on S1 and S2, of which only the spokes 22, 23 of the right fan wheel 2 are visible in FIG. 2 and only the spokes 32-34 of the left fan wheel 3 are visible in FIG. 3.
  • the spoke planes S1 and S2 of each fan wheel 2 and 3 are located axially centrally between the end faces of their fan wheels in terms of construction and mass balance. Openings are provided in the spoke planes S1 and S2 between the spokes 22-25 and 32-35, so that an axial air flow compensation of the air flows entering at both end faces of each fan wheel in the sense of a uniform full loading of the outlet side of the fan wheel despite the possibly by the central drive motor impeded air entry can take place on the inner end faces of the drive motor 1 facing each fan wheel 2 or 3.
  • the two fan wheels designed as a single component are identical to one another 2 and 3 attached to the common fan shaft 4 such that, viewed in the axial direction, they are offset from one another by a gap by the circumferential angle of rotation.

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

Description

Die Erfindung bezieht sich auf einen Radialventilator gemäß Oberbegriff des Anspruchs 1; ein derartiger Radialventilator ist durch die US-PS 2 275 564 bekannt.The invention relates to a radial fan according to the preamble of claim 1; such a centrifugal fan is known from US-PS 2 275 564.

Durch die DE-OS 2 043 175 ist außerdem ein geräuschgedämpftes Radialgebläse mit einem einzigen ein- oder zweiflutigen Trommelläufer bekannt, dessen geschlossene mittige Nabenscheibe beidseitig mit zusätzlichen Radialflügeln besetzt ist, die auf der einen Nabenscheibenseite gegenüber denen auf der anderen Nabenscheibenseite, vorzugsweise um eine halbe Fiügeiteiiung, versetzt angeordnet sind.From DE-OS 2 043 175 a noise-dampened radial fan with a single single or double-flow drum rotor is also known, the closed central hub disc is occupied on both sides with additional radial vanes, on one side of the hub disc compared to those on the other side of the hub disc, preferably by half Fuügeiteiiung, are arranged offset.

Gemäß Aufgabe vorliegender Erfindung soll ein Radialventilator der gattungsgemäßen Art geschaffen werden, der bei aufwandsarmer Fertigung als leichtes Massenprodukt, insbes. zum Einsatz als Kraftfahrzeug-Ventilator, herstellbar ist und trotzdem nur ein geringes Betriebsgeräusch aufweist.According to the object of the present invention, a centrifugal fan of the generic type is to be created which can be manufactured as a light mass product, in particular for use as a motor vehicle fan, with little effort and yet has only a low operating noise.

Die Lösung dieser Aufgabe gelingt bei einem Radialventilator der eingangs genannten Art erfindungsgemäß durch die Lehre des Anspruchs 1; vorteilhafte Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche.This object is achieved in a radial fan of the type mentioned in the invention by the teaching of claim 1; advantageous embodiments of the invention are the subject of the dependent claims.

Der erfindungsgemäße Radialventilator erlaubt einerseits durch seine mit Durchbrechungen versehenen Speichenebenen der Lüfterräder eine Luftführungsverteilung der an beiden Stirnseiten jedes Lüfterrades angesaugten Luftströmung über die gesamte axiale Austrittsbreite jedes Lüfterschaufelkranzes und andererseits bei einfachster Fertigung als einstückig gespritztes leichtes Kunststoffteil ein niedriges Lüfter-Betriebsgeräusch, da sich die das Betriebsgeräusch mitbestimmenden, aus dem Zusammenwirken der beiden Lüfterräder ergebenden Kräfte durch die gegenseitige Phasenverschiebung kompensieren und somit nicht ungünstig auswirken können.The radial fan according to the invention allows on the one hand, through its perforated spoke planes of the fan wheels, an air distribution distribution of the air flow sucked in on both end faces of each fan wheel over the entire axial outlet width of each fan blade ring and, on the other hand, in the simplest manufacture as a one-piece, injection-molded, light plastic part, a low fan operating noise, since that Compensate operating noise, resulting from the interaction of the two fan wheels, by the mutual phase shift and thus cannot have an unfavorable effect.

Dieser Lösung liegt folgende Erkenntnis zugrunde: Obwohl bedingt durch den Fertigungsprozeß der einstückig aus Kunststoff gespritzten leichten Lüfterräder die Lüfterradform mit einer Vieleck-Außenkontur entsprechend der Speichenzahl geringfügig von der idealen Kreisform abweichen kann und dadurch an sich Rüttelkräfte auf die Lüfterwelle einwirken müßten, wird durch den erfindungsgemäßen Versatz der beiden Lüfterräder in vorteilhafter Weise erreicht, daß sich die insgesamt auf die Lüfterwelle einwirkenden Rüttelkräfte weitgehend gegenseitig kompensieren und in ihrer Gesamtheit somit wirkungslos bleiben. Darüber hinaus wird auch eine wesentliche Minderung der Luftströmungsgeräusche dadurch erreicht, daß die aufgrund der Durchbrechungen in den Speichenebenen an sich zu befürchtenden axialen Luftströmungen zwischen den beiden Lüfterrädem weitgehend vermieden werden, da einerseits zwar ein axialer Verteilungsstrom der angesaugten Luft zu der Luftaustrittsseite innerhalb eines einzelnen Lüfterrades aufgrund der Durchbrechungen in der Speichenebene in vorteilhafter Weise möglich ist, jedoch ein an sich unerwünschter axialer Luftstrom zwischen den beiden Lüfterrädem aufgrund des gegenseitigen Versatzes der Lüfterräder auf Lücke und des dadurch verminderten axialen Strömungsquerschnittes zwischen den inneren Stirnseiten der beiden axial hintereinander angeordneten Lüfterrädem verhindert wird.This solution is based on the following finding: Although, due to the manufacturing process of the lightweight fan wheels molded in one piece from plastic, the fan wheel shape with a polygonal outer contour may differ slightly from the ideal circular shape in accordance with the number of spokes and, as such, vibrating forces would have to act on the fan shaft Offset of the two fan wheels according to the invention advantageously achieved that the overall vibrating forces acting on the fan shaft largely compensate one another and thus remain ineffective in their entirety. In addition, a substantial reduction in the air flow noise is achieved in that the axial air flows between the two fan wheels, which are to be feared due to the openings in the spoke planes, are largely avoided, since, on the one hand, an axial distribution flow of the sucked-in air to the air outlet side within a single fan wheel is advantageously possible due to the perforations in the spoke plane, but an inherently undesirable axial air flow between the two fan wheels is prevented due to the mutual offset of the fan wheels to a gap and the axial flow cross section thereby reduced between the inner end faces of the two fan wheels arranged axially one behind the other.

Die' Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung werden im folgenden anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels erläutert; darin zeigen:

  • Fig. 1 eine axiale Draufsicht auf die Lüfterradanordnung mit zwei Lüfterrädern und einem axial mittigen Antriebsmotor;
  • Fig. 2 in einem Halbbild die stirnseitige Draufsicht auf die axial äußere Stirnseite des ersten Lüfterrades;
  • Fig. 3 in einem Halbbild die stirnseitige Draufsicht auf die axial äußere Stirnseite des zweiten Lüfterrades.
The 'invention and further advantageous embodiments of the invention are explained below with reference to an embodiment shown schematically in the drawing; show in it:
  • Figure 1 is an axial plan view of the fan wheel assembly with two fan wheels and an axially central drive motor.
  • 2 is a field view of the front plan view of the axially outer end face of the first fan wheel;
  • Fig. 3 in a field the front plan view of the axially outer end face of the second fan wheel.

Fig. 1 zeigt die axiale Draufsicht auf die Lüfterradantriebsanordnung eines für Heiz- oder Klimaanlagen von Kraftfahrzeugen vorgesehenen Radialgebläses. Auf das rechte Motorwellenende eines Kommutatormotors 1 ist ein erstes Lüfterrad 2 und auf das linke Motorwellenende des Kommutatormotors 1 ein zweites Lüfterrad 3 fest montiert. Die Motorwelle dient somit gleichzeitig als Lüfterwelle 4. Beide Lüfterräder 2 bzw. 3 sind in hier nicht dargestellter, jedoch allgemein bekannter Weise von einem Spiralgehäuse als Luftführungsgehäuse umgeben. Die Ankerwicklung des dauermagneterregten Kommutatormotors 1 wird über Bürstenhalter 11, 12 von einer elektrischen Zuleitung 13 gespeist.1 shows the axial top view of the fan wheel drive arrangement of a radial fan provided for heating or air conditioning systems of motor vehicles. A first fan wheel 2 is fixedly mounted on the right motor shaft end of a commutator motor 1 and a second fan wheel 3 is fixedly mounted on the left motor shaft end of the commutator motor 1. The motor shaft thus simultaneously serves as a fan shaft 4. Both fan wheels 2 and 3 are surrounded by a spiral housing as an air duct housing in a manner which is not shown here but is generally known. The armature winding of the permanent magnet-excited commutator motor 1 is fed from an electrical supply line 13 via brush holders 11, 12.

Die Figuren 2 und 3 zeigen jeweils in einem Halbbild die Draufsicht auf die jeweils axial äußere Stirnseite der Lüfterräder 2 bzw. 3, die als einander identische Einheitsbauteile einstückig aus Kunststoff gespritzt sind. Jedes Lüfterrad 2, 3 weist eine Nabe 26 bzw. 36 zur Befestigung des Lüfterrades auf der Lüfterwelle 4, einen Lüfterschaufelkranz 21 bzw. 31 sowie zur Verbindung zwischen der Nabe 4 und dem im radialen Abstand gehaltenen Lüfterschaufelkranz 21 bzw. 31 vier in je einer Speichenebene S1 bzw. S2 liegende Speichen 22-25 bzw. 32-35 auf, von denen in Fig. 2 nur die Speichen 22, 23 des rechten Lüfterrades 2 und in Fig. 3 nur die Speichen 32-34 des linken Lüfterrades 3 sichtbar sind. Die Speichenebenen S1 bzw. S2 jedes Lüfterrades 2 bzw. 3 liegen in hinsichtlich Konstruktion und Massenausgleich günstiger Weise axial mittig zwischen den Stirnseiten ihrer Lüfterräder. Zwischen den Speichen 22-25 bzw. 32-35 sind Durchbrechungen in den Speichenebenen S1 bzw. S2 vorgesehen, derart daß ein axialer Luftführungsausgleich der an beiden Stirnseiten jedes Lüfterrades eintretenden Luftströme im Sinne einer gleichmäßigen vollen Beaufschlagung der Austrittsseite des Lüfterrades trotz des gegebenenfalls durch den mittigen Antriebsmotor behinderten Lufteintritts an den dem Antriebsmotor 1 zugewandten inneren Stirnseiten jedes Lüfterrades 2 bzw. 3 erfolgen kann.FIGS. 2 and 3 each show in a field the top view of the axially outer end face of the fan wheels 2 and 3, which are injection-molded in one piece from plastic as identical unit components. Each fan wheel 2, 3 has a hub 26 or 36 for fastening the fan wheel on the fan shaft 4, a fan blade ring 21 or 31 and for connection between the hub 4 and the fan blade ring 21 or 31, which are held at a radial distance, four each in a spoke plane Spokes 22-25 and 32-35 lying on S1 and S2, of which only the spokes 22, 23 of the right fan wheel 2 are visible in FIG. 2 and only the spokes 32-34 of the left fan wheel 3 are visible in FIG. 3. The spoke planes S1 and S2 of each fan wheel 2 and 3 are located axially centrally between the end faces of their fan wheels in terms of construction and mass balance. Openings are provided in the spoke planes S1 and S2 between the spokes 22-25 and 32-35, so that an axial air flow compensation of the air flows entering at both end faces of each fan wheel in the sense of a uniform full loading of the outlet side of the fan wheel despite the possibly by the central drive motor impeded air entry can take place on the inner end faces of the drive motor 1 facing each fan wheel 2 or 3.

Erfindungsgemäß sind die beiden als Einheitsbauteil ausgeführten einander identischen Lüfterräder 2 bzw. 3 auf der gemeinsamen Lüfterwelle 4 derart befestigt, daß sie, in Achsrichtung gesehen, um den Verdrehungs-Umfangswinkel gegeneinander auf Lücke versetzt angeordnet sind. Bei der hier vorgesehenen Verteilung von vier Speichen 22-25 bzw. 32-35 über den Umfang der Speichenebenen S1 bzw. S2 beträgt somit der Verdrehungs-Umfangswinkel a = 45°.According to the invention, the two fan wheels designed as a single component are identical to one another 2 and 3 attached to the common fan shaft 4 such that, viewed in the axial direction, they are offset from one another by a gap by the circumferential angle of rotation. With the distribution of four spokes 22-25 and 32-35 provided here over the circumference of the spoke planes S1 and S2, the circumferential angle of twist is therefore = 45 ° .

Claims (5)

1. A radial fan having identical fan impellers arranged axially on either side of a common driving motor on respective ends of a fan shaft, each fan impeller having a rim of fan blades spaced radially from a fan hub disc by spokes having free tangential spaces left between them, characterised in that the respective fan impellers (2, 3) are integrally injection-moulded from plastics material and displaced relative to one another on the fan shaft (4) through an angle of rotation a, and in that the spokes (22-25) of one fan impeller (2) are, when seen axially of the fan shaft (4), arranged in gaps relative to the spokes (32-35) of the other fan impeller (3).
2. A radial fan according to claim 1, characterised by only a single, in particular radially displaced and axially central, spoke plane (S1, S2 respectively) for each of the fan impellers (2, 3).
3. A radial fan according to claim 1 or claim 2, characterised in that, when viewed in the axial direction, the spokes (22-25) of the one fan impeller (2) are exactly centred in gaps between the spokes (32-35) of the other fan impeller (3).
4. A radial fan according to any one of claims 13, characterised by four spokes (22-25 and 32-35) in each spoke plane (S1, S2), displaced relative to one another by an angle of 90° in the respective spoke plane (S1, S2).
5. A radial fan according to any one of claims 14, characterised in that each fan impeller (2, 3) is surrounded by its own air guidance housing, in particular a spiral housing, the air guidance housing also having lateral air intake openings in it at the driving motor side.
EP87113062A 1986-09-19 1987-09-07 Radial fan Revoked EP0261490B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863631942 DE3631942A1 (en) 1986-09-19 1986-09-19 RADIAL FAN
DE3631942 1986-09-19

Publications (2)

Publication Number Publication Date
EP0261490A1 EP0261490A1 (en) 1988-03-30
EP0261490B1 true EP0261490B1 (en) 1990-03-21

Family

ID=6309954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113062A Revoked EP0261490B1 (en) 1986-09-19 1987-09-07 Radial fan

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US (1) US4746266A (en)
EP (1) EP0261490B1 (en)
DE (2) DE3631942A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002951C1 (en) * 2000-01-25 2000-11-30 Daimler Chrysler Ag Radial ventilation fan for automobile passenger compartment has 2 separate fan stages driven by central electric motor contained within respective ventialtion channels leading to floor of passenger compartment

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388956A (en) * 1994-03-09 1995-02-14 General Electric Company Fan assembly and method for reducing fan noise
FI101565B (en) 1997-01-17 1998-07-15 Flaekt Woods Ab Evaporator fan and its impeller
FI101564B1 (en) * 1997-01-17 1998-07-15 Flaekt Oy High pressure fan
US6896478B2 (en) * 2002-12-16 2005-05-24 Visteon Global Technologies, Inc. Dual fan blower with axial expansion
CN1295438C (en) * 2003-09-15 2007-01-17 海尔集团公司 Blower fan with single electric machine and bilobed wheel
KR100628078B1 (en) * 2005-02-15 2006-09-26 엘지전자 주식회사 Ventilation Systems
ITBO20070382A1 (en) * 2007-05-31 2008-12-01 Spal Automotive Srl ELECTRIC
CN105179311A (en) * 2015-09-01 2015-12-23 吉首大学 Dust-deposition-preventing long-shaft fan impeller with wedge-shaped blade
CN107288923B (en) * 2017-07-13 2020-08-25 广东美的厨房电器制造有限公司 Impeller and lampblack absorber for lampblack absorber

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275564A (en) * 1938-12-02 1942-03-10 Carrier Corp Ventilator
DE2530133C3 (en) * 1975-07-05 1979-04-05 Bayerische Motoren Werke Ag, 8000 Muenchen Ventilation, heating and / or air conditioning apparatus for motor vehicles
DE2939385C2 (en) * 1979-09-28 1982-11-25 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Radial fans, in particular for heating or air conditioning systems for vehicles

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB441269A (en) * 1934-06-14 1936-01-14 Rene De Mey Improvements in or relating to the mounting of axial flow fans and the like
GB469970A (en) * 1936-03-20 1937-08-06 Matthews & Yates Ltd Improvements relating to fan impellers
US2251553A (en) * 1938-04-13 1941-08-05 Albert G Redmond Blower
US2181628A (en) * 1938-06-04 1939-11-28 Carrier Corp Fan apparatus
US2291480A (en) * 1941-04-10 1942-07-28 Morrison Products Inc Blower
DE2043175A1 (en) * 1970-08-31 1972-03-23 Sel Noise-dampened radial fan
US3688867A (en) * 1971-06-30 1972-09-05 Ibm Acoustically improved blower package
DE2164129A1 (en) * 1971-12-23 1973-06-28 Siemens Ag IMPELLER FOR DRUM RUNNER FANS
US3780411A (en) * 1972-10-19 1973-12-25 Case Co J I Method of making blower housing assembly
DE2618894A1 (en) * 1976-04-29 1977-11-17 Ziehl Abegg Kg Blower drive motor stator - is fixed via draw bars to immobile part and bars are fitted with noise reduction system
JPS5418596A (en) * 1977-07-13 1979-02-10 Ishikawajima Harima Heavy Ind Co Ltd Propulsive propeller
US4419049A (en) * 1979-07-19 1983-12-06 Sgm Co., Inc. Low noise centrifugal blower
JPS5685594A (en) * 1979-12-17 1981-07-11 Matsushita Seiko Co Ltd Fan of unequal interval
DE3050372A1 (en) * 1980-12-31 1982-10-21 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Single or double entry reversible impeller for centrifugal fan - has blades between rings fixed to hub via inclined alternate spokes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275564A (en) * 1938-12-02 1942-03-10 Carrier Corp Ventilator
DE2530133C3 (en) * 1975-07-05 1979-04-05 Bayerische Motoren Werke Ag, 8000 Muenchen Ventilation, heating and / or air conditioning apparatus for motor vehicles
DE2939385C2 (en) * 1979-09-28 1982-11-25 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Radial fans, in particular for heating or air conditioning systems for vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002951C1 (en) * 2000-01-25 2000-11-30 Daimler Chrysler Ag Radial ventilation fan for automobile passenger compartment has 2 separate fan stages driven by central electric motor contained within respective ventialtion channels leading to floor of passenger compartment

Also Published As

Publication number Publication date
DE3761995D1 (en) 1990-04-26
DE3631942A1 (en) 1988-04-07
EP0261490A1 (en) 1988-03-30
DE3631942C2 (en) 1988-06-30
US4746266A (en) 1988-05-24

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