EP0255583A2 - Blower, especially for a hair dryer - Google Patents

Blower, especially for a hair dryer Download PDF

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Publication number
EP0255583A2
EP0255583A2 EP87108056A EP87108056A EP0255583A2 EP 0255583 A2 EP0255583 A2 EP 0255583A2 EP 87108056 A EP87108056 A EP 87108056A EP 87108056 A EP87108056 A EP 87108056A EP 0255583 A2 EP0255583 A2 EP 0255583A2
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EP
European Patent Office
Prior art keywords
slots
blower
housing
slits
housing cap
Prior art date
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Granted
Application number
EP87108056A
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German (de)
French (fr)
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EP0255583B2 (en
EP0255583B1 (en
EP0255583A3 (en
Inventor
Günter Petz
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Publication of EP0255583A2 publication Critical patent/EP0255583A2/en
Publication of EP0255583A3 publication Critical patent/EP0255583A3/en
Application granted granted Critical
Publication of EP0255583B1 publication Critical patent/EP0255583B1/en
Publication of EP0255583B2 publication Critical patent/EP0255583B2/en
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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands

Definitions

  • the invention relates to a blower, in particular for hair dryers, with a cup-shaped housing cap arranged on the blower housing and engaging over the suction opening and having slits formed in the cap base for the passage of the suction air, in which slits extend radially in the middle section on concentric circular lines and in the edge region.
  • this object has been achieved in that a large number on an annular surface of the edge region of the housing cap bottom Housing cap center inclined slots are arranged, which are individually in connection with extending in the housing cap peripheral surface axial slots and that the inclination of the slots is directed against the direction of rotation of the fan blade.
  • the slits are inclined such that the extensions of the central axes thereof extend at a distance from the center of the housing cap.
  • the slits create a hole pattern for the suction side of the blower with a large passage of air, which leads to a noticeable increase in air performance while maintaining the speed, or requires a reduced speed while maintaining the air performance, which means that the blower is characterized by low noise.
  • the central axes of the slots form a straight line. But there is also the possibility that the central axes of the slots form arc lines. The curvature of the arc lines can be chosen arbitrarily.
  • the slits are formed inclined to the left or right in a top view of the cap base and the inclination of the slits is directed against the direction of rotation of the fan blade.
  • 1 denotes a blower for hair drying, the housing 2 of which accommodates an electric motor, a blower wheel and an electric heating register (not shown) in a manner known per se.
  • the electric motor and the heating register can be applied to a power source in a further known manner by means of switching elements.
  • 3 with a handle is designated, which is hinged to the housing 2.
  • the blower air can be fed to the blower via a blower housing cap 4 with air passage openings 5 and exits freely through an exhaust air opening in the blower housing 2.
  • air passage openings 5 4 ⁇ ring-section-shaped slots and in the edge region of the same slots 6 are provided on concentric circular lines of the blower cap base.
  • the slots 6 are inclined with respect to the center of the housing cap, ie the central axes of the slots 6 form an acute angle ⁇ with radial lines 7.
  • the inclination of the slits 6 is directed against the direction of rotation of the fan blade.
  • the slots 6 continue in the housing cap circumferential surface in axial slots 8. It has been found that the inclined slits 6 or slits 6 in connection with the axial slits 8 make a substantial increase in the air output possible at the same speed of the fan blade. It corresponds to the essence of the invention that the slots 6 have either straight central axes (FIG. 2) or, as shown in FIGS. 3 and 4, curved lines to the central axis. The inclination of the slits 6 can run to the left or right. The direction of rotation of the fan blade is opposite to achieve the best air performance.

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cleaning And Drying Hair (AREA)
  • Dry Shavers And Clippers (AREA)

Abstract

The blower has a can-shaped housing cap, which is arranged on the blower housing and grips over the intake opening, with slots formed in the cap base for conduction of the intake air. The slots extend on concentric circular lines in the central portion and radially in the edge region. In order to improve the air output whilst maintaining the speed of the blower vane, a plurality of slots (6) inclined towards the centre point of the housing cap are provided on an annular surface of the edge region of the base (4') of the housing cap. The slots (6) are in connection individually with axial slots (8) extending in the circumferential surface of the housing and their inclination (6) is directed counter to the direction of rotation of the blower vane. <IMAGE>

Description

Die Erfindung betrifft ein Gebläse, insbesondere für Haartrockner mit einer am Gebläsegehäuse angeordneten und über die Ansaugöffnung greifenden topfförmigen Gehäusekappe mit im Kappenboden ausgebildeten Schlit­zungen zur Durchleitung der Ansaugluft, bei dem Schlit­zungen sich im Mittelabschnitt auf konzentrischen Kreislinien und im Randbereich radial erstrecken.The invention relates to a blower, in particular for hair dryers, with a cup-shaped housing cap arranged on the blower housing and engaging over the suction opening and having slits formed in the cap base for the passage of the suction air, in which slits extend radially in the middle section on concentric circular lines and in the edge region.

Bei bekannten Gebläsen dieser Art finden ringabschnitt­förmig auf konzentrischen Kreislinien im Gehäusekap­penboden ausgebildete Luftansaugschlitze Anwendung. Das so gebildete Lochbild für die Ansaugluft erweist sich jedoch als zu klein und wirkt sich deshalb un­günstig auf den Luftdurchsatz aus. Weiter ist es be­kannt, um die ringabschnittförmigen Schlitze im Rand­bereich des Gehäusekappenbodens zusätzlich radiale Luftansaugschlitze vorzusehen, die die Luftleistung jedoch nur geringfügig verbessern helfen. Beiden Aus­führungen ist der Nachteil gemeinsam, daß Luftleistungs­erhöhungen Drehzahlsteigerungen des Gebläseflügels zur Voraussetzung haben, was wiederum zu starken Anhebungen der Geräuschpegel führt.In known fans of this type, air intake slots formed in the form of a ring section on concentric circular lines in the bottom of the housing cap are used. However, the hole pattern thus formed for the intake air proves to be too small and therefore has an unfavorable effect on the air flow. Furthermore, it is known to additionally provide radial air intake slots in the edge-section-shaped slots in the edge region of the housing cap base, which slots, however, only slightly improve the air performance. The disadvantage of both versions is that increases in air output require increased speeds of the fan blade, which in turn leads to sharp increases in the noise level.

Es ist Aufgabe der Erfindung, ohne Drehzahlerhöhungen die Luftleistung bei Gebläsen zu verbessern.It is an object of the invention to improve the air performance in fans without speed increases.

Der Erfindung gemäß hat diese Aufgabe dadurch eine Lö­sung gefunden, daß auf einer Ringfläche des Randbereichs des Gehäusekappenbodenrs eine Vielzahl gegenüber dem Gehäusekappenmittelpunkt geneigte Schlitzungen an­geordnet sind, die einzeln mit in der Gehäusekappen­umfangsfläche sich erstreckenden axialen Schlitzungen in Verbindung stehen und daß die Neigung der Schlit­zungen entgegen der Umlaufrichtung des Gebläseflügels gerichtet ist. Die Schlitzungen sind derart geneigt, daß sich die Verlängerungen der Mittelachsen dersel­ben im Abstand des Gehäusekappenmittelpunkts erstrek­ken. Die Schlitzungen ergeben ein Lochbild für die An­saugseite des Gebläses mit großem Luftdurchgang, das unter Beibehaltung der Drehzahl zu einer spürbaren Anhebung der Luftleistung führt, bzw. bei Beibehal­tung der Luftleistung eine reduzierte Drehzahl er­fordert, wodurch sich das Gebläse durch eine geringe Geräuschbildung auszeichnet.According to the invention, this object has been achieved in that a large number on an annular surface of the edge region of the housing cap bottom Housing cap center inclined slots are arranged, which are individually in connection with extending in the housing cap peripheral surface axial slots and that the inclination of the slots is directed against the direction of rotation of the fan blade. The slits are inclined such that the extensions of the central axes thereof extend at a distance from the center of the housing cap. The slits create a hole pattern for the suction side of the blower with a large passage of air, which leads to a noticeable increase in air performance while maintaining the speed, or requires a reduced speed while maintaining the air performance, which means that the blower is characterized by low noise.

In Ausgestaltung des Gebläses ist vorgesehen, daß die Mittelachsen der Schlitzungen eine Gerade bilden. Es besteht aber auch die Möglichkeit, daß die Mittelach­sen der Schlitzungen Bogenlinien bilden. Die Krüm­mung der Bogenlinien kann beliebig gewählt sein. Schließ­lich ist vorgesehen, die Schlitzungen in Draufsicht auf den Kappenboden entweder nach links oder rechts geneigt auszubilden und die Neigung der Schlitzungen entgegen der Umlaufrichtung des Gebläseflügels zu richten.In the configuration of the blower, it is provided that the central axes of the slots form a straight line. But there is also the possibility that the central axes of the slots form arc lines. The curvature of the arc lines can be chosen arbitrarily. Finally, it is provided that the slits are formed inclined to the left or right in a top view of the cap base and the inclination of the slits is directed against the direction of rotation of the fan blade.

Es versteht sich, daß die Neigung der Schlitzungen auch in Drehrichtung des Gebläseflügels ausgeführt sein kann. Hierbei stellt sich jedoch nicht ein ganz so günstiger Luftdurchsatz ein.It is understood that the inclination of the slots can also be carried out in the direction of rotation of the fan blade. However, this does not result in a very favorable air throughput.

Die Erfindung ist anhand eines Ausführungs­beispiels in der Zeichnung verdeutlicht. Es bedeu­ten:

  • Fig. 1 ein Gebläse in Seitenansicht,
  • Fig. 2 ein Gebläse in Rückansicht,
  • Fig. 3 eine Gebläsegehäusekappe in Draufsicht und
  • Fig. 4 eine abgewandelte Gebläsegehäusekappe in Draufsicht.
The invention is illustrated in the drawing using an exemplary embodiment. It means:
  • 1 is a blower in side view,
  • 2 is a blower in rear view,
  • Fig. 3 is a blower housing cap in plan view and
  • Fig. 4 is a modified fan housing cap in plan view.

In den Fig. ist mit 1 ein Gebläse zur Haartrocknung bezeichnet, dessen Gehäuse 2 in an sich bekannter Wei­se einen Elektromotor, ein Gebläserad und ein elek­trisches Heizregister (nicht gezeigt) aufnimmt. Der Elektromotor und das Heizregister sind in weiter be­kannter Weise mittels Schaltglieder an eine Stromquel­le anlegbar. Mit 3 ist ein Handgriff bezeichnet, der am Gehäuse 2 angelenkt ist.In the figures, 1 denotes a blower for hair drying, the housing 2 of which accommodates an electric motor, a blower wheel and an electric heating register (not shown) in a manner known per se. The electric motor and the heating register can be applied to a power source in a further known manner by means of switching elements. 3 with a handle is designated, which is hinged to the housing 2.

Die Gebläseluft ist über eine Gebläsegehäusekappe 4 mit Luftdurchtrittsöffnungen 5 dem Gebläse zuführbar und tritt über eine Abluftöffnung im Gebläsegehäuse 2 frei aus. Zur Bildung der Luftdurchtrittsöffnungen 5 sind auf konzentrischen Kreislinien des Gebläsekap­penbodens 4ʹ ringabschnittsförmige Schlitzungen und im Randbereich desselben Schlitzungen 6 vorgesehen. Die Schlitzungen 6 sind gegenüber dem Gehäusekappen­mittelpunkt geneigt, d. h. die Mittelachsen der Schlit­zungen 6 bilden mit Radiallinien 7 einen spitzen Win­kel α . Die Neigung der Schlitzungen 6 ist entgegen der Umlaufrichtung des Gebläseflügels gerichtet.The blower air can be fed to the blower via a blower housing cap 4 with air passage openings 5 and exits freely through an exhaust air opening in the blower housing 2. To form the air passage openings 5 4ʹ ring-section-shaped slots and in the edge region of the same slots 6 are provided on concentric circular lines of the blower cap base. The slots 6 are inclined with respect to the center of the housing cap, ie the central axes of the slots 6 form an acute angle α with radial lines 7. The inclination of the slits 6 is directed against the direction of rotation of the fan blade.

Die Schlitzungen 6 setzen sich in der Gehäuse­kappenumfangsfläche in axialen Schlitzungen 8 fort. Es ist gefunden worden, daß die geneigten Schlitzun­gen 6 bzw. Schlitzungen 6 in Verbindung mit den axi­alen Schlitzungen 8 eine wesentliche Erhöhung der Luftleistung bei gleicher Drehzahl des Gebläseflügels möglich machen. Es entspricht dem Wesen der Erfindung, daß die Schlitzungen 6 entweder mit geraden Mittelach­sen (Fig. 2) oder aber wie in den Fig. 3 und 4 ge­zeigt, Bogenlinien zur Mittelachse haben. Die Neigung der Schlitzungen 6 kann dabei nach links oder rechts verlaufen. Die Umlaufrichtung des Gebläseflügels ist zur Erzielung der günstigsten Luftleistung jeweils entgegengerichtet.The slots 6 continue in the housing cap circumferential surface in axial slots 8. It has been found that the inclined slits 6 or slits 6 in connection with the axial slits 8 make a substantial increase in the air output possible at the same speed of the fan blade. It corresponds to the essence of the invention that the slots 6 have either straight central axes (FIG. 2) or, as shown in FIGS. 3 and 4, curved lines to the central axis. The inclination of the slits 6 can run to the left or right. The direction of rotation of the fan blade is opposite to achieve the best air performance.

Claims (5)

1. Gebläse, insbesondere für Haartrockner mit einer am Gebläsegehäuse angeordneten und über die Ansaugöff­nung greifenden topfförmigen Gehäusekappe mit im Kap­penboden ausgebildeten Schlitzungen zur Durchleitung der Ansaugluft, bei dem die Schlitzungen sich im Mit­telabschnitt auf konzentrischen Kreislinien und im Randbereich radial erstrecken, dadurch gekennzeichnet, daß auf einer Ringfläche des Randbereichs des Gehäuse­kappenbodens (4ʹ) eine Vielzahl gegenüber dem Gehäuse­kappenmittelpunkt geneigte Schlitzungen (6) angeordnet sind, die einzeln mit in der Gehäuseumfangsfläche sich er­streckenden axialen Schlitzungen (8) in Verbindung stehen und daß die Neigung der Schlitzungen (6) entge­gen der Umlaufrichtung des Gebläseflügels gerichtet ist.1. Blower, especially for hair dryers with a arranged on the blower housing and over the suction opening cup-shaped housing cap with slits formed in the cap bottom for the passage of the intake air, in which the slits extend radially in the middle section on concentric circular lines and in the edge area, characterized in that an annular surface of the edge area of the housing cap bottom (4ʹ) a plurality of slits (6) inclined relative to the center of the housing cap are arranged, which are individually connected to axial slits (8) extending in the housing circumferential surface and that the inclination of the slits (6) counter to the circumferential direction of the fan blade is directed. 2. Gebläse nach Anspruch 1, dadurch gekennzeichnet, daß die Schlitzungen (6) derart geneigt sind, daß sich die Ver­längerungen der Mittelachsen derselben im Abstand des Gehäusekappenmittelpunkts erstrecken.2. Blower according to claim 1, characterized in that the slots (6) are inclined such that the extensions of the central axes thereof extend at a distance from the center of the housing cap. 3. Gebläse nach Anspruch 1 und 2, dadurch gekennzeich­net, daß die Mittelachsen der Schlitzungen (6) eine Gerade bilden.3. Blower according to claim 1 and 2, characterized in that the central axes of the slots (6) form a straight line. 4. Gebläse nach Anspruch 1 und 2, dadurch gekennzeich­net, daß die Mittelachsen der Schlitzungen (6) Bogen­linien bilden. (Fig. 3 und 4)4. Blower according to claim 1 and 2, characterized in that the central axes of the slots (6) form curved lines. (Figs. 3 and 4) 5. Gebläse nach Anspruch 1, dadurch gekennzeichnet, daß die Schlitzungen (6) in Draufsicht nach links oder rechts geneigt im Gehäusekappenboden (4ʹ) und ent­gegen der Umlaufrichtung des Gebläseflügels ausgebil­det sind.5. Blower according to claim 1, characterized in that the slots (6) in top view inclined to the left or right in the housing cap base (4ʹ) and against the circumferential direction of the fan blade are formed.
EP19870108056 1986-08-05 1987-06-04 Blower, especially for a hair dryer Expired - Lifetime EP0255583B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863626485 DE3626485A1 (en) 1986-08-05 1986-08-05 BLOWED, ESPECIALLY FOR HAIR DRYERS
DE3626485 1986-08-05

Publications (4)

Publication Number Publication Date
EP0255583A2 true EP0255583A2 (en) 1988-02-10
EP0255583A3 EP0255583A3 (en) 1989-01-04
EP0255583B1 EP0255583B1 (en) 1991-09-04
EP0255583B2 EP0255583B2 (en) 1993-12-29

Family

ID=6306730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870108056 Expired - Lifetime EP0255583B2 (en) 1986-08-05 1987-06-04 Blower, especially for a hair dryer

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EP (1) EP0255583B2 (en)
DE (2) DE3626485A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219849A (en) * 1988-06-17 1989-12-20 Zanussi A Spa Industrie Noise reduced tumble dryer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753373A1 (en) * 1996-12-10 1998-06-25 Papst Motoren Gmbh & Co Kg Housing for axial cooling fan for EMC-screened apparatus, such as CPU

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1595795A (en) * 1978-05-02 1981-08-19 Firth Cleveland Ltd Hairdryers
GB2164554A (en) * 1984-09-19 1986-03-26 Krups Stiftung Electric hair dryer with air dispersing hood

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2174654A (en) * 1938-01-31 1939-10-03 Tropic Aire Inc Fan heater unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1595795A (en) * 1978-05-02 1981-08-19 Firth Cleveland Ltd Hairdryers
GB2164554A (en) * 1984-09-19 1986-03-26 Krups Stiftung Electric hair dryer with air dispersing hood

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219849A (en) * 1988-06-17 1989-12-20 Zanussi A Spa Industrie Noise reduced tumble dryer
GB2219849B (en) * 1988-06-17 1992-10-14 Zanussi A Spa Industrie Domestic tumble dryer

Also Published As

Publication number Publication date
EP0255583B2 (en) 1993-12-29
EP0255583B1 (en) 1991-09-04
DE3772662D1 (en) 1991-10-10
EP0255583A3 (en) 1989-01-04
DE3626485A1 (en) 1988-02-18
DE3626485C2 (en) 1992-01-09

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