EP0439781B1 - Haartrocknergerät - Google Patents

Haartrocknergerät Download PDF

Info

Publication number
EP0439781B1
EP0439781B1 EP90124653A EP90124653A EP0439781B1 EP 0439781 B1 EP0439781 B1 EP 0439781B1 EP 90124653 A EP90124653 A EP 90124653A EP 90124653 A EP90124653 A EP 90124653A EP 0439781 B1 EP0439781 B1 EP 0439781B1
Authority
EP
European Patent Office
Prior art keywords
diffuser
air
ring
inlet
dome
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
EP90124653A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0439781A1 (de
Inventor
Wilfried Rolf
Robert Dr. Jung
Svatopluk Krumnikl
Wolfgang Wiese
Robert Oberheim
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.)
Braun GmbH
Original Assignee
Braun 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 Braun GmbH filed Critical Braun GmbH
Publication of EP0439781A1 publication Critical patent/EP0439781A1/de
Application granted granted Critical
Publication of EP0439781B1 publication Critical patent/EP0439781B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A45D20/122—Diffusers, e.g. for variable air flow

Definitions

  • the invention relates to a diffuser for a hair dryer device which emits an air flow to the outside via an inlet connector and an air guiding device separate from the inlet connector and an outwardly expanding diffuser bell.
  • Such a diffuser is already known from DE-OS 27 28 406, which has an outwardly widening diffuser panel with numerous outlet openings.
  • the concave diffuser screen several outwardly extending spacer fingers are provided, which have outlet slits at their base in the transition area to the diffuser screen, so that all of the outflowing air for drying the hair is blown only onto the hair surface.
  • the diffuser nozzle consists of an outer diffuser bell, in which the concave diffuser screen is embedded and firmly connected to the diffuser bell by means of screws.
  • the shape of the diffuser bell and diffuser screen creates an annular gap or an air duct between the diffuser bell and the diffuser screen, so that air is applied to the individual slot openings in this way.
  • the bottom of the diffuser screen lies directly in front of the inlet nozzle of the diffuser bell, so that the incoming air flow hits this plate directly, which leads to considerable flow losses. Only after the air has impinged on the plate can it flow swirled sideways into the ring channel in order to then be discharged to the outside via the outlet openings in the diffuser panel.
  • a diffuser which has an outwardly widening diffuser bell with numerous outlet openings through which the air flow is discharged to the outside.
  • the diffuser bell At its narrow end, the diffuser bell has an elastic region with which it surrounds an inlet connection piece, which protrudes a little into the diffuser bell and can possibly act as an air guiding device for the diffuser.
  • the air flows through the outlet of the hair dryer and the inlet nozzle into the diffuser bell.
  • the air is strongly swirled, since the diameter of the inlet connector is considerably smaller than the diameter of the diffuser bell in the air outlet area and the cylindrical shape of the inlet connector is not approximated to the outwardly widening shape of the diffuser bell.
  • the area of the inlet nozzle that protrudes into the diffuser bell is also very short, so that a targeted air flow is not guaranteed.
  • the flexible bands arranged in the interior of the diffuser bell as fastening elements between the inflexible middle part of the diffuser screen and the elastic region of the diffuser bell form an additional flow resistance for the air emerging from the inlet connection. A uniform, swirl-free air flow is not guaranteed with this diffuser.
  • the object of the invention is to design the diffuser in such a way that the outlet velocity of the air flow is reduced using simple structural means, without reducing the air throughput and increasing the flow resistance.
  • the air guide device separated from the inlet connection consists of at least one guide element having a concentric passage opening with respect to the inlet connection, the guide element having at least two guide rings of different diameters which radially widen in the direction of flow and which advantageously advantageously uniformly adjust the air flow let expand outside.
  • the wall thickness of the guide rings can be very small.
  • the guide rings can advantageously be arranged in a fan-like manner relative to one another. It is also advantageous that the guide ring, which is smaller in diameter, projects forward with respect to the direction of flow compared to the guide ring which is larger in diameter, so that the fan-like arrangement of the guide rings is obtained in this way. As a result, the incoming air flow is diverted and widened without loss of flow in such a way that it leaves the diffuser nozzle with relatively large swirls and thus contributes to gentle hair drying.
  • the individual air rings can advantageously also consist of a plurality of individual guide vanes arranged next to one another, all of which form a guide ring.
  • the individual guide rings are detachably connected to wall parts of the diffuser nozzle.
  • several webs can be provided in a star shape on the inner wall of the diffuser nozzle into which the guide rings are clipped or clamped.
  • the diffuser nozzle can be used without a diffuser screen or with a diffuser screen that is attached to the outlet end of the diffuser nozzle.
  • the diffuser screen is concave and has numerous outlet openings that are evenly pressurized with air via the guide rings. Due to the advantageous design of the diffuser nozzle with the associated guide rings, the exit velocity of the inflowing warm air can be reduced in such a way that the hair is not swirled too much during hair drying processes, in particular with pre-shaped hairstyles. By reducing the outlet speed of the air flow by means of the diffuser bell and the associated diffuser screen, there is no reduction in the air throughput and thus a backflow with the associated overheating of the hair dryer is avoided.
  • the diffuser bell of the diffuser nozzle increases outwards and that the air entering the diffuser bell via the inlet connector is not swirled by obstacles.
  • the guide rings lying in the air flow rather contribute to calming the incoming, sometimes highly turbulent air flow when using an axial fan and also fanning it out in such a way that the diffuser screen or the outlet opening of the diffuser bell is evenly pressurized with air over its entire surface.
  • the diffuser can also be handled without the diffuser panel.
  • any other diffuser nozzle it is extremely advantageous that numerous spacer fingers are provided on the outer side of the diffuser screen, which have outlet openings in the region of their outer ends.
  • the air emerging from the diffuser nozzle can not only strike the hair from the outside, but can also be guided into the area of the hair roots in the scalp area, so that the hair is better flooded during the drying process.
  • the hair can be loosened in a simple manner, the spacers preventing the air nozzle from being brought too close to the scalp.
  • gentle drying e.g. of perms or air-dried, pre-shaped hair, can be ensured without the backflow of the hair dryer resulting in a reduction in the outlet velocity of the air flow, which in turn would lead to an inadmissible temperature increase.
  • the distance between at least two adjacent outlet openings is approximately equal to or smaller than the largest inner dimension of an outlet opening.
  • numerous outlet openings can be provided in the diffuser panel, so that the flow velocity can be reduced without increasing the back pressure or the flow resistance.
  • the outlet openings are circular.
  • the inlet side of the passage opening of the guide ring extends into the area of a cylindrical inlet connector and the outlet side extends into the outwardly widening part of the diffuser bell. It is also advantageous that the total length of the guide rings is less than half the length of the diffuser bell. It is also advantageous that the distance between the outer outlet edge of the diffuser bell and the outlet side of the inner guide ring is approximately the same as the distance between the inlet edge of the outer guide ring and the inlet edge of the cylindrical inlet connector of the diffuser bell.
  • the diffuser screen can be detachably connected to the diffuser bell via a rotary connection.
  • a hair dryer device 1 is shown in dashed lines in FIG. 1, which receives a diffuser nozzle 3 at its outlet connection 2, which diffuser nozzle 4 consists of a diffuser bell 4 that widens outward like a funnel and a diffuser screen 9.
  • the diffuser bell 4 has a cylindrical inlet connector 20, which can be detachably connected to the outlet connector 2 of the hairdryer device 1 via a bayonet lock 12 provided in the region of the inlet edge 22.
  • the inlet side 18 of an air guiding device 5 is located in the region of the outlet end of the inlet stub 20.
  • the diffuser bell 4 which widens outward in a funnel shape, adjoins the cylindrical inlet stub 20, into which the air guiding device 5 extends, which also extends to expanded outside.
  • the air guide device 5 consists of an outer, funnel-shaped guide ring 13 and an inner, forward, i.e. Downstream staggered guide ring 14, which are arranged approximately concentrically with respect to the central axis of the diffuser bell 4, so that the passage openings 7 of both guide rings 13 and 14 also run approximately concentrically to the central axis of the diffuser bell 4.
  • the two guide rings 13, 14 are connected via star-shaped webs 10 to wall parts 11 of the diffuser bell 4, wherein the guide rings 13 and 14, or only one of the guide rings 13, 14, can also be detachably connected to the webs 10, for example via snap closures to thereby facilitate the manufacture of parts made from injection molding and thus reduce costs.
  • the production of an extremely complex injection mold is avoided if at least one of the guide rings 13, 14 is clipped into the diffuser bell 4 as a separate, clip-on part after it has been produced.
  • the distance between the outlet edge 21 of the diffuser bell 4 and the outlet side 19 of the inner guide ring 14 may be approximately the same as the distance between the inlet side 18 of the outer guide ring 13 and the inlet edge 22 of the cylindrical inlet connector 20th the diffuser bell 4. Due to the advantageous placement of the guide rings 13 and 14 and the funnel-shaped extensions, the air flow is gently deflected and fanned out and the flow velocity in the widening part of the diffuser bell 4 is reduced without increasing the dynamic pressure and thus the flow losses .
  • the diffuser screen 9 is shown in cross section, which consists of a concave plate 15, in which, as is apparent from Figs. 3 and 4, numerous closely adjacent Outlet openings 25 are provided, wherein the distance between two adjacent outlet openings 25 can be approximately the same or smaller than the diameter of the outlet opening 25.
  • a plurality of spacing fingers 16, which are arranged at a distance from one another, are embedded in or firmly connected to the plate 15 and are of hollow design. At least one outlet opening 17 is provided in the region of the outer end of the spacer finger 16.
  • the diffuser nozzle can be used once without a diffuser panel 9, only as a diffuser bell 4 (see FIG. 5) or also with a diffuser panel 9 attached, which for this purpose is to be connected to the outlet end of the diffuser bell 4 via a bayonet catch 28.
  • the diffuser screen 9 is placed axially on the outlet connection 26 of the diffuser bell 4 and then fixed by a small rotation by means of the bayonet catch 28.
  • corresponding pins or knobs can be provided on the diffuser panel 9, which can be brought into engagement with the bayonet catch 28.
  • the guide rings 13 and 14 shown in FIG. 5 can each be formed from a one-piece or continuous guide ring. the. However, according to FIG. 7, it is also possible to arrange numerous small guide vanes 30 in the form of a ring instead of these guide rings 13 and 14, which guide blades in total form two guide rings 13 and 14. In addition, it is also possible to rotate the individual guide blades 30 a little about their longitudinal axis in order to influence the fanning out of the air flow.
  • the total length of the guide rings 13 and 14 can advantageously be less than half the length of the diffuser bell 4.
  • the outlet openings 25 shown in FIG. 3 are circular. However, they can also have a different shape. For example, it is possible to design this as a slot opening. Likewise, the outlet openings 17 in the spacers 16 can be circular or in the form of elongated holes.
  • the individual circular outlet openings 25 are arranged on a circular ring with respect to the central axis of the diffuser nozzle 3.
  • the next smaller circle with the outlet openings 25 can be offset a little laterally with respect to the adjacent circular ring, so that the inner outlet openings are located between the space between two adjacent outlet openings 25 of the outer circular ring.

Landscapes

  • Cleaning And Drying Hair (AREA)
  • Drying Of Solid Materials (AREA)
EP90124653A 1990-02-01 1990-12-19 Haartrocknergerät Expired - Lifetime EP0439781B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002944A DE4002944A1 (de) 1990-02-01 1990-02-01 Haartrocknergeraet
DE4002944 1990-02-01

Publications (2)

Publication Number Publication Date
EP0439781A1 EP0439781A1 (de) 1991-08-07
EP0439781B1 true EP0439781B1 (de) 1994-08-31

Family

ID=6399204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124653A Expired - Lifetime EP0439781B1 (de) 1990-02-01 1990-12-19 Haartrocknergerät

Country Status (4)

Country Link
EP (1) EP0439781B1 (enrdf_load_stackoverflow)
AT (1) ATE110538T1 (enrdf_load_stackoverflow)
DE (2) DE4002944A1 (enrdf_load_stackoverflow)
ES (1) ES2060916T3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4458203A1 (en) * 2023-05-01 2024-11-06 Spectrum Brands, Inc. Diffuser attachment for air-moving appliance

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100509A1 (de) * 1991-01-10 1992-07-16 Petz Elektro Waerme Techn Elektrischer haartrockner
GB9124609D0 (en) * 1991-11-20 1992-01-08 Parkinson James W A diffuser
USD349585S (en) 1992-08-06 1994-08-09 Conair Corporation Reversible diffuser for a hair dryer
DE9218533U1 (de) * 1992-12-22 1994-06-09 Braun Ag, 60326 Frankfurt Werkzeug zur Haarformung/-trocknung für ein luftdurchströmtes Gerät des persönlichen Bedarfs
AU6509394A (en) * 1993-04-16 1994-11-08 Beautronix (Hong Kong) Limited Hairdryers
DE4445237C1 (de) * 1994-12-17 1996-05-02 Braun Ag Haarformungswerkzeug
US6957500B2 (en) 2002-11-01 2005-10-25 Wahl Clipper Corporation Attachment for handheld dryer
GB2414180B (en) * 2004-05-21 2007-07-25 Kenford Ind Co Ltd Hairdryer diffuser
US8407913B2 (en) * 2007-09-27 2013-04-02 Wahl Clipper Corporation Conditioner infuser for hair dryer attachment
JP4884547B2 (ja) * 2010-04-04 2012-02-29 有限会社川野技研 案内羽根入り吹出エルボ
ITMI20110544A1 (it) * 2011-04-01 2012-10-02 Tenacta Group Spa Dispositivo per asciugare i capelli
AU2016277995B2 (en) 2015-06-16 2018-11-08 Dyson Technology Limited Diffuser
GB2539431B (en) * 2015-06-16 2018-01-03 Dyson Technology Ltd Diffuser
EP3106058A1 (en) 2015-06-16 2016-12-21 Dyson Technology Limited Diffuser
GB2539437B (en) 2015-06-16 2018-07-04 Dyson Technology Ltd Diffuser
GB2539432B (en) 2015-06-16 2019-01-09 Dyson Technology Ltd Diffuser
GB2539441B (en) 2015-06-16 2019-01-09 Dyson Technology Ltd Diffuser
AU365799S (en) * 2015-06-18 2015-12-14 Dyson Technology Ltd Accessory for hairdryer
MX366512B (es) * 2015-07-24 2019-07-11 Koninklijke Philips Nv Dispositivo para el cuidado del cabello.
US10835007B2 (en) * 2017-07-14 2020-11-17 Spectrum Brands, Inc. Hair dryer
US20190159566A1 (en) * 2017-11-30 2019-05-30 Michelle Baldini Eyelash Shaping Assembly
GB2602091B (en) * 2020-12-17 2023-10-11 Dyson Technology Ltd Diffuser
GB2633382A (en) * 2023-09-08 2025-03-12 Dyson Technology Ltd A haircare appliance
GB2637033A (en) * 2024-01-05 2025-07-09 Dyson Technology Ltd Diffuser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2728406A1 (de) * 1977-06-24 1979-01-04 Wigo Widmann Soehne Gottlob Haarbehandlungsgeraet

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB972682A (en) * 1961-01-24 1964-10-14 Stanley Bridges Ltd Improvements in or relating to hair dryers
SE316875B (enrdf_load_stackoverflow) * 1966-05-06 1969-11-03 Lumalampan Ab
DE2307066A1 (de) * 1973-02-14 1974-08-22 Severin & Co Gmbh A Geraet zum trocknen von haaren
FR2446615B1 (fr) * 1979-01-18 1986-04-04 Velecta Sa Dispositif diffuseur d'air adaptable sur un sechoir pour les cheveux
NL7902158A (nl) * 1979-03-20 1980-09-23 Philips Nv Handhaardroger.
US4230279A (en) * 1979-06-08 1980-10-28 Helene Curtis Industries, Inc. Hair dryer attachment
US4287673A (en) * 1980-01-11 1981-09-08 Sunbeam Corporation Hair dryer diffuser

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2728406A1 (de) * 1977-06-24 1979-01-04 Wigo Widmann Soehne Gottlob Haarbehandlungsgeraet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4458203A1 (en) * 2023-05-01 2024-11-06 Spectrum Brands, Inc. Diffuser attachment for air-moving appliance
US20240365947A1 (en) * 2023-05-01 2024-11-07 Spectrum Brands, Inc. Diffuser attachment for air-moving appliance

Also Published As

Publication number Publication date
DE4002944C2 (enrdf_load_stackoverflow) 1992-04-16
ES2060916T3 (es) 1994-12-01
DE4002944A1 (de) 1991-08-14
EP0439781A1 (de) 1991-08-07
ATE110538T1 (de) 1994-09-15
DE59006976D1 (de) 1994-10-06

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