EP0446316B2 - Miniature fan - Google Patents

Miniature fan Download PDF

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Publication number
EP0446316B2
EP0446316B2 EP90913243A EP90913243A EP0446316B2 EP 0446316 B2 EP0446316 B2 EP 0446316B2 EP 90913243 A EP90913243 A EP 90913243A EP 90913243 A EP90913243 A EP 90913243A EP 0446316 B2 EP0446316 B2 EP 0446316B2
Authority
EP
European Patent Office
Prior art keywords
fan
hub
fan wheel
housing
impeller
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.)
Expired - Lifetime
Application number
EP90913243A
Other languages
German (de)
French (fr)
Other versions
EP0446316B1 (en
EP0446316A1 (en
Inventor
Peter Meier
Ernst Scherrer
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.)
Micronel AG
Original Assignee
Micronel 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4258189&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0446316(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Micronel AG filed Critical Micronel AG
Publication of EP0446316A1 publication Critical patent/EP0446316A1/en
Application granted granted Critical
Publication of EP0446316B1 publication Critical patent/EP0446316B1/en
Publication of EP0446316B2 publication Critical patent/EP0446316B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans

Definitions

  • the invention relates to a small fan according to the preamble of independent claim 1.
  • the applicant has now taken on the task of developing the generic fan to the effect that that it has a higher performance with the same external dimensions and at the same time is quieter and cheaper can be manufactured.
  • the inventive small fan has in contrast to the above Fan, which is a small axial fan, has an approximately laminar flow. Because in the the air that is blowing through essentially no turbulence, it is much quieter. In order to is an improvement that has long been sought in this field.
  • a particularly flat design with a favorable power density is a further development of the invention achieved by the impeller front edges and the hub front and the housing front lie approximately in the same plane.
  • the small fan has a cuboidal air duct housing 2 with an outer part 2a and one circular recess 2f.
  • a known electric motor 4 with electromagnetic coils is on a molded-on base 2b 4a attached.
  • the arms 4c connect the electric motor 4 to the outer housing part 2a.
  • An impeller 1 made of plastic is inserted into the recess 2f and by means of an axis 3 and a bearing 6 rotatably mounted in the housing 2.
  • the axis 3 is fixedly connected to the impeller 1 surrounded by an annular permanent magnet 5, which forms part of the electric motor 4.
  • the impeller 1 preferably has five molded blades 1a, each of the same pitch angle ⁇ over the entire wing depth and thus parallel blade edges (Fig. 3). It has been shown that with a number of wings between 3 and 7 a particularly favorable one Ratio between volume flow and sound is reached. The wings are not wound and have up to to their attachment point the same cross section as shown in Fig. 3 The angle of attack is preferably about 30 °.
  • the air enters the fan axially through the housing front 2d and also leaves it in the axial direction through the rear side 2e. The inflow to the impeller and the outflow is thus largely axial.
  • the impeller 1, however, is like through the flow lines 7 indicated diagonally flows.
  • the hub 2d of the impeller 1 has a flat front surface 1c, which with the housing front 2d and the wing leading edges 1b lie approximately in one plane.
  • the flow area adjoining the area 1c 1e of the hub 1d has the shape shown in FIG. 1.
  • the flow areas 1e and 1f of the wing 1a result from the section according to FIG. 3. Hubs and vanes are designed so that the flow the air through the housing is laminar and there are essentially no pressure differences on the blades in the radial direction occur.

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

Abstract

The miniature fan has a plastic air-guide casing (2) in which is rotatably fitted an impeller (1) in the form of a meridian-flow fan. The blades (1a) of the impeller (1) are not twisted and exhibit the same pitch over their entire depth. The leading edges (1b) of the impeller, the front of the hub (1c) and the front of the casing (2d) lie in about the same plane. Meridian-flow fans have the advantage over the axial type of providing greater power density with less noise.

Description

Die Erfindung betrifft einen Kleinventilator nach dem Oberbegriff des unabhängigen Patentanspruchs 1.The invention relates to a small fan according to the preamble of independent claim 1.

Ein Kleinventilator dieser Gattung ist durch die US-A-4,504,751 der Anmelderin bekannt geworden. Bei diesem ist der Elektromotor in der aussenseitig kreiszylindrischen Nabe eines einstückigen Flügelrades untergebracht, was bei axialem Luftaustritt auf der Rückseite des Luftführungsgehäuses besonders kleine Aussenabmessungen ermöglicht. Dieser Ventilator hat deshalb viele Anwendungen gefunden. Bei einigen Anwendungen sind jedoch die auftretenden Geräusche störend. Ferner ist durch die DE-A-29 44 183 ein Diagonalgebläse bekannt, bei dem jedoch der Mantel der Nabe des Flügelrades kreiskegelförmig oder konkav paraboloidisch ist und das einen radialen Strömungsaustritt besitzt Da der Motor getrennt vom Flügel an der Rückseite angeordnet ist, ist eine flache Bauweise wie beim gattungsgemässen Ventilator grundsätzlich nicht möglich. Die Anmelderin hat sich nun die Aufgabe gestellt, den gattungsgemässen Ventilator dahingehend weiterzubilden, dass er bei gleichen Aussenmassen eine höhere Leistung aufweist und gleichzeitig leiser ist und kostengünstiger hergestellt werden kann. Dererfindungsgemässe Kleinventilator weist im Gegensatz zum oben genannten Ventilator, der ein kleines Axialgebläse ist, einen angenähert laminaren Durchfluss auf. Da in der durchstörmenden Luft im wesentlichen somit keine Verwirbelungen auftreten, ist er wesentlich leiser. Damit wird eine auf diesem Fachgebiet seit langem angestrebte Verbesserung erreicht.A small fan of this type has become known from the applicant's US-A-4,504,751. At the electric motor is housed in the externally circular cylindrical hub of a one-piece impeller, what is particularly small outside dimensions with axial air outlet on the back of the air duct housing enables. This fan has therefore found many uses. In some applications however, the noises that occur are disturbing. Furthermore, DE-A-29 44 183 is a diagonal fan known, but in which the jacket of the hub of the impeller is circular cone-shaped or concave paraboloid and which has a radial flow outlet Since the motor is arranged separately from the wing on the back a flat design as with the generic fan is fundamentally not possible. The The applicant has now taken on the task of developing the generic fan to the effect that that it has a higher performance with the same external dimensions and at the same time is quieter and cheaper can be manufactured. The inventive small fan has in contrast to the above Fan, which is a small axial fan, has an approximately laminar flow. Because in the the air that is blowing through essentially no turbulence, it is much quieter. In order to is an improvement that has long been sought in this field.

Versuche haben nun gezeigt, dass beim erfindungsgemässen Ventilator die Leistungsdichte verglichen mit dem einen Axialventilator etwa um 30% höher ist. Obwohl seit langem bekannt ist, das meridianbeschleunigte Gebläse eine günstige Leistungsdichte aufweisen, hatte diese Erkenntnis bisher den Bau der Kleinventilatoren nicht beeinflusst. Wesentlich ist nun, dass die Flügel des Flügelrades nicht verwunden sind und jeweils über die ganze Flügeltiefe den gleichen Anstellwinkel aufweisen. Das Flügelrad kann deshalb bei einfacher Entformung einstückig und damit kostengünstig im Spritzgussverfahren hergestellt werden.Tests have now shown that the power density is compared in the fan according to the invention with one axial fan is about 30% higher. Although it has long been known, the accelerated meridian Fans have a favorable power density, until now this knowledge had been used to build the small fans unaffected. It is now essential that the blades of the impeller are not twisted and each Have the same angle of attack over the entire wing depth. The impeller can therefore be easier Demoulding in one piece and thus inexpensively manufactured using the injection molding process.

Durch die Kombination der erfindungswesentlichen Merkmale wird somit bei einfacher Herstellung ein Ventilator mit günstigeren Betriebseigenschaften geschaffen.The combination of the features essential to the invention thus results in a simple manufacture Fan with more favorable operating characteristics created.

Eine besonders flache Bauweise bei günstiger Leistungsdichte wird nach einer Weiterbildung der Erfindung dadurch erreicht, dass die Flügelradvorderkanten und die Nabenfrontseite sowie die Gehäusefrontseite etwa in gleiche Ebene liegen.A particularly flat design with a favorable power density is a further development of the invention achieved by the impeller front edges and the hub front and the housing front lie approximately in the same plane.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
einen Schnitt durch einen erfindungsgemässen Kleinventilator,
Fig. 2
eine Teilansicht eines Flügelrades,
Fig. 3
einen Schnitt durch einen Flügel entlang der Linie lll-lll in Fig. 2, und
Fig. 4
eine Ansicht des Luftführungsgehäuses.
An embodiment of the invention is explained below with reference to the drawings. Show it:
Fig. 1
2 shows a section through a small fan according to the invention,
Fig. 2
a partial view of an impeller,
Fig. 3
a section through a wing along the line III-III in Fig. 2, and
Fig. 4
a view of the air duct housing.

Der Kleinventilator weist ein quaderförmiges Luftführungsgehäuse 2 mit einem Aussenteil 2a und einer kreisrunden Ausnehmung 2f auf. Auf einem angeformten Boden 2b ist ein bekannter Elektromotor 4 mit Elektromagnetspulen 4a angebracht. Mit Armen 2c ist der Elektromotor 4 mit dem Gehäuseaussenteil 2a verbunden.The small fan has a cuboidal air duct housing 2 with an outer part 2a and one circular recess 2f. A known electric motor 4 with electromagnetic coils is on a molded-on base 2b 4a attached. The arms 4c connect the electric motor 4 to the outer housing part 2a.

Ein aus Kunststoff hergestelltes Flügelrad 1 ist in die Ausnehmung 2f eingesetzt und mittels einer Achse 3 und einem Lager 6 rotierbar im Gehäuse 2 gelagert. Die fest mit dem Flügelrad 1 verbundene Achse 3 ist von einem ringförmigen Dauermagneten 5 umgeben, der ein Bestanteil des Elektromotors 4 bildet.An impeller 1 made of plastic is inserted into the recess 2f and by means of an axis 3 and a bearing 6 rotatably mounted in the housing 2. The axis 3 is fixedly connected to the impeller 1 surrounded by an annular permanent magnet 5, which forms part of the electric motor 4.

Wie insbesondere die Fig. 2 und 3 zeigen, besitzt das Flügelrad 1 vorzugsweise fünf angeformte Flügel 1a, die jeweils über die gesamte Flügeltiefe den gleichen Anstellwinkel α und somit parallele Schaufelkanten (Fig. 3) aufweisen. Es hat sich gezeigt, dass bei einer Flügelzahl zwischen 3 und 7 ein besonders günstiges Verhältnis zwischen Volumenstrom und Schall erreicht wird. Die Flügel sind nicht verwunden und besitzen bis zu ihrer Ansatzstelle den gleichen wie in Fig. 3 gezeigten Querschnitt Der Anstellwinkel beträgt vorzugsweise etwa 30°. In der Darstellung nach Fig. 1 tritt die Luft durch die Gehäusefrontseite 2d axial in den Ventilator ein und verlässt diesen ebenfalls in axialer Richtung durch die Gehäuserückseite 2e. Die Zuströmung zum Laufrad und die Abströmung erfolgt somit weitgehend axial. Das Flügelrad 1 wird hingegen wie durch die Strömungslinien 7 angedeutet diagonal durchströmt.As particularly shown in FIGS. 2 and 3, the impeller 1 preferably has five molded blades 1a, each of the same pitch angle α over the entire wing depth and thus parallel blade edges (Fig. 3). It has been shown that with a number of wings between 3 and 7 a particularly favorable one Ratio between volume flow and sound is reached. The wings are not wound and have up to to their attachment point the same cross section as shown in Fig. 3 The angle of attack is preferably about 30 °. In the illustration according to FIG. 1, the air enters the fan axially through the housing front 2d and also leaves it in the axial direction through the rear side 2e. The inflow to the impeller and the outflow is thus largely axial. The impeller 1, however, is like through the flow lines 7 indicated diagonally flows.

Die Nabe 2d des Flügelrades 1 weist eine ebene Frontfläche 1c auf, die mit der Gehäusefrontseite 2d sowie den Flügelvorderkanten 1b etwa in einer Ebene liegen. Die an die Fläche 1c anschliessende Strömungsfläche 1e der Nabe 1d weist die aus Fig. 1 ersichtliche Formgebung auf. Die Strömungsflächen 1e und 1f der Flügel 1a ergeben sich aus dem Schnitt gemäss Fig. 3. Naben und Flügel sind so ausgebildet, dass der Durchfluss der Luft durch das Gehäuse laminar ist und an den Flügeln in radialer Richtung im wesentlichen keine Druckunterschiede auftreten.The hub 2d of the impeller 1 has a flat front surface 1c, which with the housing front 2d and the wing leading edges 1b lie approximately in one plane. The flow area adjoining the area 1c 1e of the hub 1d has the shape shown in FIG. 1. The flow areas 1e and 1f of the wing 1a result from the section according to FIG. 3. Hubs and vanes are designed so that the flow the air through the housing is laminar and there are essentially no pressure differences on the blades in the radial direction occur.

Claims (3)

  1. Small fan having a cuboid and flat air-guidance housing (2), in which there is disposed a fan wheel (1) driven by an electric motor (4) and through the end face (2d) of which air enters and through the rear side (2e) of which air is axially discharged, the blades (1a) of the fan wheel (1) not being twisted and being inclined towards the rotational axis of the fan wheel and respectively exhibiting the same angel (α) of attack over the entire depth of the blade, and the electric motor being disposed in the hub (1d) of the fan wheel (1), characterized in that it is a meridian-accelerated fan, in that -the flow face (1g) of the hub (1d), which flow face adjoins a front side (2d) of the housing, is convexly configured over the entire depth of the fan wheel (1), such that the flow of air through the airguidance housing (2) is laminar and essentially no pressure differences arise at the blades (1a) in the radial direction, wherein the front edges (1b) of the fan wheel and the front sides (1c) of the hub and the front side (2d) of the housing are situated approximately in the same plane and wherein the flow face (1g) of the hub (1b), which flow face adjoins the plane front side (1c) of the hub, exhibiting the form as shown in Fig. 1.
  2. Small fan according to Claim 1, characterized in that the fan wheel (1) is in one piece and is preferably made from plastic.
  3. Small fan according to Claim 1 or 2 characterized in that the number of blades (1a) preferably totals three to eleven.
EP90913243A 1989-09-29 1990-09-20 Miniature fan Expired - Lifetime EP0446316B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH3540/89 1989-09-29
CH354089 1989-09-29
CH354089 1989-09-29
PCT/CH1990/000223 WO1991005169A1 (en) 1989-09-29 1990-09-20 Miniature fan

Publications (3)

Publication Number Publication Date
EP0446316A1 EP0446316A1 (en) 1991-09-18
EP0446316B1 EP0446316B1 (en) 1994-02-02
EP0446316B2 true EP0446316B2 (en) 2001-12-05

Family

ID=4258189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913243A Expired - Lifetime EP0446316B2 (en) 1989-09-29 1990-09-20 Miniature fan

Country Status (6)

Country Link
US (1) US5217351A (en)
EP (1) EP0446316B2 (en)
JP (1) JP3090216B2 (en)
DE (1) DE59004520D1 (en)
HU (1) HU210777B (en)
WO (1) WO1991005169A1 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127134B4 (en) * 1991-08-15 2004-07-08 Papst Licensing Gmbh & Co. Kg diagonal fan
KR970010561B1 (en) * 1994-04-18 1997-06-28 삼성전자 주식회사 Constant noise air blower
JP2987133B2 (en) * 1997-04-25 1999-12-06 日本電産コパル株式会社 Axial fan and method for manufacturing blade of axial fan and mold for manufacturing blade of axial fan
JP3500292B2 (en) * 1998-01-30 2004-02-23 日本電産コパル株式会社 Axial fan
FR2781843B1 (en) * 1998-07-28 2000-10-20 Valeo Thermique Moteur Sa OPTIMIZED COMPACT FAN PROPELLER
FR2812349B1 (en) * 2000-07-31 2003-01-24 Jouan WORKING SPEAKER WITH A PROPELLER FOR MOVING ITS ATMOSPHERE AND CORRESPONDING PROPELLER
US20030223865A1 (en) * 2002-05-30 2003-12-04 Sunonwealth Electric Machine Industry Co., Ltd. Casing for a heat-dissipating fan
JP2004169680A (en) * 2002-11-18 2004-06-17 Taida Electronic Ind Co Ltd Blade structure and heat radiator using it
FR2864368B1 (en) * 2003-12-19 2006-08-04 Valeo Equip Electr Moteur DEVICE FOR STRENGTHENING THE VENTILATION OF AN ELECTRIC MACHINE AND ELECTRIC MACHINE COMPRISING SUCH A DEVICE
CN100424360C (en) * 2004-02-11 2008-10-08 台达电子工业股份有限公司 Fan and its flabellum assembly
US20070031262A1 (en) * 2005-08-04 2007-02-08 Jinseok Kim Computer cooling fan
TWI293106B (en) * 2005-11-22 2008-02-01 Sunonwealth Electr Mach Ind Co Thin-type fan
TWI292014B (en) * 2005-11-22 2008-01-01 Sunonwealth Electr Mach Ind Co Ultra thin-type fan
TW200732565A (en) * 2006-02-21 2007-09-01 Sunonwealth Electr Mach Ind Co The structure of a small blower
TW200736507A (en) * 2006-03-27 2007-10-01 Sunonwealth Electr Mach Ind Co A thin structure pattern of heat dissipation
TWI349515B (en) * 2006-10-25 2011-09-21 Delta Electronics Inc Fan and fan frame thereof
US20080107366A1 (en) * 2006-11-06 2008-05-08 Zippy Technology Corp. Air fan bearing structure
TWI328080B (en) * 2007-03-30 2010-08-01 Delta Electronics Inc Fan and impeller thereof
JP2008267176A (en) * 2007-04-17 2008-11-06 Sony Corp Axial flow fan device, housing, and electronic equipment
TWI373563B (en) * 2008-06-03 2012-10-01 Sunonwealth Electr Mach Ind Co Brushless dc motor
AU2009291507B2 (en) * 2008-09-11 2013-06-13 Hunter Pacific International Pty Ltd Extraction fan and rotor
US10034411B2 (en) * 2015-09-25 2018-07-24 Apple Inc. Thermal flow assembly including integrated fan

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US420470A (en) * 1890-02-04 Exhaust-fan
FR1177794A (en) * 1957-05-24 1959-04-29 Fluid propulsion device
DE1503483B2 (en) * 1964-06-23 1970-12-23 Aktiebolaget Electrolux, Stockholm Blower, in particular in connection with a motor vehicle device
DE2327125C3 (en) * 1973-05-28 1979-11-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Axial fan with housing
CH635900A5 (en) * 1978-02-15 1983-04-29 Papst Motoren Kg AXIAL COMPACT FAN.
DE2944183A1 (en) * 1978-11-08 1980-05-29 Papst Motoren Kg MINIATURE DIAGONAL BLOWER WITH AXIAL FLOW INLET AND RADIAL FLOW OUTLET
FR2454921A1 (en) * 1979-04-25 1980-11-21 Ferodo Sa DEVICE FOR MOUNTING A MOTOR-FAN GROUP IN A HEATING AND / OR AIR-CONDITIONING INSTALLATION OF THE INTERIOR OF A MOTOR VEHICLE
JPS5775200U (en) * 1980-10-24 1982-05-10
FR2497883B1 (en) * 1981-01-09 1985-12-13 Etri Sa FLAT TYPE AXIAL ELECTRIC FAN
DE3371016D1 (en) * 1982-12-10 1987-05-21 Micronel Ag Ventilator with an electronically commutated d.c. motor
JPS6141886U (en) * 1984-08-21 1986-03-17 株式会社 日本計器製作所 Juan Motor
DE3439539A1 (en) * 1984-10-29 1986-05-07 Papst-Motoren GmbH & Co KG, 7742 St Georgen FAN
DE3541787A1 (en) * 1985-11-26 1987-06-04 Papst Motoren Gmbh & Co Kg FAN WITH AN ESSENTIALLY SQUARE SHAPED HOUSING
US4927328A (en) * 1989-03-02 1990-05-22 Scoates William D Shroud assembly for axial flow fans
US5096373A (en) * 1991-02-21 1992-03-17 Sun Microsystems, Inc. Integrated forced convection air cooling systems

Also Published As

Publication number Publication date
EP0446316B1 (en) 1994-02-02
HU210777B (en) 1995-07-28
US5217351A (en) 1993-06-08
DE59004520D1 (en) 1994-03-17
EP0446316A1 (en) 1991-09-18
JPH04502052A (en) 1992-04-09
WO1991005169A1 (en) 1991-04-18
HU907760D0 (en) 1991-07-29
JP3090216B2 (en) 2000-09-18
HUT62375A (en) 1993-04-28

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