EP0255583B2 - Blower, especially for a hair dryer - Google Patents

Blower, especially for a hair dryer Download PDF

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Publication number
EP0255583B2
EP0255583B2 EP19870108056 EP87108056A EP0255583B2 EP 0255583 B2 EP0255583 B2 EP 0255583B2 EP 19870108056 EP19870108056 EP 19870108056 EP 87108056 A EP87108056 A EP 87108056A EP 0255583 B2 EP0255583 B2 EP 0255583B2
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EP
European Patent Office
Prior art keywords
slots
cap
fan
blower
central axes
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
EP19870108056
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German (de)
French (fr)
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EP0255583A3 (en
EP0255583B1 (en
EP0255583A2 (en
Inventor
Günter Petz
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Individual
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Individual
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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 reaching over the suction opening and which has a plurality of slits for concentrating circular lines and radial lines of an annular surface in the edge region for the passage of suction air, the latter each with in extending axial slots are connected to the circumferential surface of the housing cap.
  • this object has found a solution in that the central axes of the slots formed in the edge region of the housing cap are inclined with respect to the radial lines against the direction of rotation of the blower and form an acute angle with the radial lines.
  • a hole pattern with a large opening ratio for the intake air flow is achieved in the housing cap bottom, which additionally results in a flow-guiding effect for increasing the air throughput.
  • the blower is characterized by a large air throughput with little noise.
  • the central axes of the slots form a straight line. It is also possible to design the central axes of the slits as curved lines. The curvature of the curved lines can be chosen arbitrarily. Finally, it is provided to form the slits in a top view of the cap base with central axes inclined to the left or right.
  • 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.
  • a number of slits formed in the form of ring sections on concentric circular lines of the blower cap base 4 'and additional slits 6 in the edge region thereof are provided.
  • the slits 6 are oriented in their inclination from the outside inwards with respect to radial lines 7 against the direction of rotation of the blower and form acute angles ⁇ with the radial lines 7.
  • the slots 6 continue in the housing cap circumferential surface in axial slots 8. It has been found that the inclination of the slits 6 in connection with the axial slits 8 results in a substantial increase in the air throughput at the same speed of the fan blade. It is in accordance with the essence of the invention that the slots 6 can either be designed with straight central axes (FIG. 2) or, as shown in FIGS. 3 and 4, with curved central axes. The inclination of the slots 6 in the cap base 4 'can run to the left or right. The direction of rotation of the fan blade (not shown) is opposite in each case to achieve the most favorable air throughput.

Landscapes

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

Description

Die Erfindung betrifft ein Gebläse, insbesondere für Haartrockner, mit einer am Gebläsegehäuse angeordneten und über die Ansaugöffnung greifenden topfpförmigen Gehäusekappe, die zur Durchleitung von Ansaugluft im Kappenboden auf konzentrischen Kreislinien und auf Radiallinien einer Ringfläche im Randbereich eine Vielzahl Schlitzungen aufweist, wobei letztere jeweils mit in der Umfangsfläche der Gehäusekappe sich erstreckenden axialen Schlitzungen in Verbindung stehen.The invention relates to a blower, in particular for hair dryers, with a cup-shaped housing cap arranged on the blower housing and reaching over the suction opening and which has a plurality of slits for concentrating circular lines and radial lines of an annular surface in the edge region for the passage of suction air, the latter each with in extending axial slots are connected to the circumferential surface of the housing cap.

Bei eimem bekannten Gebläse dieser Art (DE-Geschmacksmuster 73 MR 9239) finden ringabschnittförmig auf konzentrischen Kreislinien im Gehäusekappenboden ausgebildete Luftansaugschlitze Anwendung. Außerdem ist bei diesem Gebläse bekannt, um die Luftansaugschlitze auf Radiallinien einer Ringfläche des Randbereichs zusätzlich radiale Luftansaugschlitze vorzusehen, die jeweils mit in der Umfangsfläche der Gehäusekappe sich erstreckenden axialen Schlitzungen in Verbindung stehen. Dieses Gebläse zeigt jedoch den Nachteil, daß Luftleistungsverbesserungen nur durch Drehzahlsteigerungen des Gebläseflügels zu erreichen sind, was zu starken Anhebungen des Geräuschpegels führt.In a known fan of this type (DE design 73 MR 9239), air intake slots formed in the shape of a ring section are used on concentric circular lines in the base of the housing cap. In addition, in this blower it is known to additionally provide radial air suction slots on radial lines of an annular surface of the edge region, each of which is connected to axial slots extending in the peripheral surface of the housing cap. However, this blower has the disadvantage that air performance improvements can only be achieved by increasing the speed of the fan blade, which leads to strong increases in the noise level.

Es ist Aufgabe der Erfindung Maßnahmen zu Luftleistungsverbesserungen unter Ausschluß von Drehzahlerhöhungen bei Gebläsen der vorstehenden Gattung zu schaffen.It is an object of the invention to provide measures to improve air performance with the exclusion of speed increases in fans of the above type.

Der Erfindung gemäß hat diese Aufgabe dadurch eine Lösung gefunden, daß die Mittelachsen der im Randbereich der Gehäusekappe ausgebildeten Schlitzungen gegenüber den Radiallinien entgegen der Umlaufrichtung des Gebläses geneigt sind und mit den Radiallinien einen spitzen Winkel bilden. Auf diese Weise ist im Gehäusekappenboden ein Lochbild mit großem Öffnungsverhältnis für den Ansaugluftstrom erzielt, das zusätzlich eine strömungsleitende Wirkung zur Erhöhung des Luftdurchsatzes ergibt. Hierdurch zeichnet sich das Gebläse durch einen großen Luftdurchsatz bei geringer Geräuschbildung aus.According to the invention, this object has found a solution in that the central axes of the slots formed in the edge region of the housing cap are inclined with respect to the radial lines against the direction of rotation of the blower and form an acute angle with the radial lines. In this way, a hole pattern with a large opening ratio for the intake air flow is achieved in the housing cap bottom, which additionally results in a flow-guiding effect for increasing the air throughput. As a result, the blower is characterized by a large air throughput with little noise.

In Ausgestaltung des Gebläses ist vorgesehen, daß die Mittelachsen der Schlitzungen Gerade bilden. Es besteht auch die Möglichkeit, die Mittelachsen der Schlitzungen als Bogenlinien auszuführen. Die Krümmungen der Bogenlinien kann beliebig gewählt sein. Schließlich ist vorgesehen, die Schlitzungen in Draufsicht auf den Kappenboden mit nach links oder rechts geneigten Mittelachsen auszubilden.In the configuration of the blower, it is provided that the central axes of the slots form a straight line. It is also possible to design the central axes of the slits as curved lines. The curvature of the curved lines can be chosen arbitrarily. Finally, it is provided to form the slits in a top view of the cap base with central axes inclined to the left or right.

Es versteht sich, daß eine Neigung der Schlitzungen, die keinen Gegenstand der vorliegenden Erfindung bildet, auch in Drehrichtung des Gebläseflügels ausgeführt sein kann. Hierbei stellt sich jedoch nicht ein ganz so günstiger Luftdurchsatz ein.It is understood that an inclination of the slots, which is not the subject of the present invention, 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 using an exemplary embodiment in the drawing. 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 blower 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 eine Anzahl auf konzentrischen Kreislinien des Gebläsekappenbodens 4' ringabschnittsförmig ausgebildete Schlitzungen und im Randbereich desselben zusätzliche Schlitzungen 6 vorgesehen. Die Schlitzungen 6 sind in ihrer Neigung von außen nach innen gegenüber Radiallinien 7 entgegen der Umlaufrichtung des Gebläses gerichtet und bilden mit den Radiallinien 7 spitze Winkel α.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, a number of slits formed in the form of ring sections on concentric circular lines of the blower cap base 4 'and additional slits 6 in the edge region thereof are provided. The slits 6 are oriented in their inclination from the outside inwards with respect to radial lines 7 against the direction of rotation of the blower and form acute angles α with the radial lines 7.

Die Schlitzungen 6 setzen sich in der Gehäusekappenumfangsfläche in axialen Schlitzungen 8 fort. Es ist gefunden worden, daß die Neigung der Schlitzungen 6 in Verbindung mit den axialen Schlitzungen 8 eine wesentliche Erhöhung des Luftdurchsatzes bei gleicher Drehzahl des Gebläseflügels ergibt. Es entspricht dem Wesen der Erfindung, daß die Schlitzungen 6 entweder mit geraden Mittelachsen (Fig. 2) oder, wie in den Fig. 3 und 4 gezeigt, mit bogenlinienförmigen Mittelachsen ausgeführt sein können. Die Neigung der Schlitzungen 6 im Kappenboden 4' kann dabei nach links oder rechts verlaufen. Die Umlaufrichtung des Gebläseflügels (nicht gezeigt) ist zur Erzielung der günstigsten Luftdurchsatzleistung jeweils entgegenerichtet.The slots 6 continue in the housing cap circumferential surface in axial slots 8. It has been found that the inclination of the slits 6 in connection with the axial slits 8 results in a substantial increase in the air throughput at the same speed of the fan blade. It is in accordance with the essence of the invention that the slots 6 can either be designed with straight central axes (FIG. 2) or, as shown in FIGS. 3 and 4, with curved central axes. The inclination of the slots 6 in the cap base 4 'can run to the left or right. The direction of rotation of the fan blade (not shown) is opposite in each case to achieve the most favorable air throughput.

Claims (4)

  1. Fan, more especially for hair driers, comprising a cup-shaped housing cap which is disposed on the fan housing and engages over the suction opening, said cap having a plurality of slots for conducting intake air in the cap base concentrically and radially of an annular area of the edge region, said slots communicating with respective axial slots which extend in the circumferential area of the fan cap, characterised in that the central axes of the slots (6), which slots are provided in the edge region of the housing cap (4), are orientated inwardly from externally in respect of their inclination relative to the radii (7) in the opposite direction to the circumferential direction of the fan and form an acute angle with the radii (7).
  2. Fan according to claim 1, characterised in that the central axes of the slots (6) each form a straight line.
  3. Fan according to claim 1, characterised in that the central axes of the slots (6) form acurate lines (Figs. 3 and 4).
  4. Fan according to claim 1, characterised in that, when viewed from above, the slots (6) are provided in the base (4') of the housing cap and are inclined to the left or right.
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 EP0255583A2 (en) 1988-02-10
EP0255583A3 EP0255583A3 (en) 1989-01-04
EP0255583B1 EP0255583B1 (en) 1991-09-04
EP0255583B2 true 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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT218171Z2 (en) * 1988-06-17 1992-04-08 Zanussi A Spa Industrie DOMESTIC DRYER.
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

Family Cites Families (3)

* 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
GB1595795A (en) * 1978-05-02 1981-08-19 Firth Cleveland Ltd Hairdryers
US4658511A (en) * 1984-09-19 1987-04-21 Robert Krups Stiftung & Co. Kg Electric hair dryer with air dispersing hood

Also Published As

Publication number Publication date
DE3772662D1 (en) 1991-10-10
DE3626485A1 (en) 1988-02-18
EP0255583A3 (en) 1989-01-04
DE3626485C2 (en) 1992-01-09
EP0255583B1 (en) 1991-09-04
EP0255583A2 (en) 1988-02-10

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