EP2965651A1 - Sèche cheveux - Google Patents

Sèche cheveux Download PDF

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Publication number
EP2965651A1
EP2965651A1 EP15174561.9A EP15174561A EP2965651A1 EP 2965651 A1 EP2965651 A1 EP 2965651A1 EP 15174561 A EP15174561 A EP 15174561A EP 2965651 A1 EP2965651 A1 EP 2965651A1
Authority
EP
European Patent Office
Prior art keywords
fan
hair dryer
holding
fan wheel
housing
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.)
Granted
Application number
EP15174561.9A
Other languages
German (de)
English (en)
Other versions
EP2965651B1 (fr
Inventor
Berthold Altmann
Daniela Blischke
Thomas Copitzky
Christian Hafer
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete 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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2965651A1 publication Critical patent/EP2965651A1/fr
Application granted granted Critical
Publication of EP2965651B1 publication Critical patent/EP2965651B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/34—Arrangements of the ventilating means

Definitions

  • the invention relates to a hair dryer.
  • a hair dryer is commonly referred to as an electrical device for drying wet hair, such as after shampooing, swimming or bathing.
  • Commercially available hairdryers typically have a fan with an electrically driven fan. The fan is used to draw air into a housing of the hair dryer, where it can be heated by means of a suitable heater. About a provided on the housing air outlet, the heated air is then expelled again from the housing interior.
  • the term "hair dryer” in the following all hair styling devices are taken in which by means of a fan air moving air is generated.
  • a disadvantage for said noise the typical-wise symmetrical structure of the fan with a Lüfterradwelle and circumferentially uniformly spaced apart fan blades proves to be.
  • Such a symmetrical arrangement of the fan blades causes a periodic interaction of the moving air with obstacles, whereby sound is generated at a sound frequency which is an integer multiple of the fundamental frequency with which the Fan wheel rotates in the housing.
  • a fan of a conventional hair dryer typically rotates at a frequency of about 250 Hz, which means that said multiples of the fundamental frequency are in the kilohertz range. Especially the noise in this frequency range is perceived by the user of the hair dryer mostly as unpleasant.
  • the basic idea of the invention is therefore to design the blower of the hair dryer asymmetrically in order in this way to largely or even completely avoid unwanted resonance effects which may adversely affect the noise development of the hair dryer.
  • a hair dryer according to the invention therefore has, in a known manner, a housing bounding a housing interior, a fan wheel being arranged in the interior of the housing which has a fan wheel shaft and a first number of fan wheel blades.
  • the latter are provided along a circumferential direction of the fan wheel shaft on the fan wheel shaft and each project radially outwardly from the latter.
  • a fan wheel holding device is provided in this fixed to the housing.
  • the base member may be formed in the manner of a hub or other suitable bearing and extend along a direction defined by the rotation axis of the fan wheel shaft.
  • the holding device furthermore comprises a second number of holding elements provided along the circumferential direction on the base element, which - in the same way as the fan wheel wings protruding from the fan wheel shaft - each project radially outwards from the base element and are supported radially on the outside of the housing.
  • a second aspect of the invention which can be combined with the first aspect, it is proposed to arrange the individual fan blades unevenly along the circumferential direction of the fan wheel shaft at this. Defining as a fan blade angular distance that angular distance which is formed between a pair of adjacent fan blades, so in a hair dryer according to the second aspect of the invention for at least two different such pairs before a different value for the fan blade angular distance. This is associated with a "non-uniform" arrangement of the fan blades on the fan wheel shaft. Such an uneven arrangement of the fan blades in circumferential action counteracts an undesirable, resonance-induced noise during the rotational movement of the fan.
  • a third aspect of the invention to transmit the principle of non-uniform arrangement of the fan blades in the circumferential direction on the holding elements of the fan-wheel holding device.
  • the individual holding elements are arranged non-uniformly along the circumferential direction of the fan wheel shaft on the base element of the holding device.
  • a holding element angular distance that angular distance between a pair of adjacent holding elements - this can be about in the manner of Haltestreben To be realized - is formed in a hair dryer according to the third aspect of the invention for at least two different such pairs for the holding element angular distance a respectively different value.
  • the proposed noise reduction measures according to the first, second and third aspects can be easily combined by the person skilled in the art in order to minimize the operational noise development of the hair dryer. It is understood that the effect of the noise reduction essential to the invention can be achieved to a particular extent when all three aspects explained above are implemented in the hair dryers.
  • not only two fan blade pitches may have different values, but all pairs of adjacent fan blades.
  • a geometrically particularly non-uniform arrangement of the individual fan blades along the circumferential direction of the fan wheel shaft is generated, which leads to an increased reduction of noise.
  • the uneven arrangement of the fan blade blades in the circumferential direction due to the associated non-rotationally symmetrical mass distribution typically causes an imbalance.
  • the inertia axis of the fan deviates from the axis of rotation of the fan wheel defined by the position of the fan wheel shaft.
  • such imbalance usually leads to increased, operational wear of the fan.
  • a Provide balancing mass on the fan wheel shaft and / or on at least one fan blade a Provide balancing mass.
  • the balancing mass is designed such that an imbalance generated during the rotational movement of the fan is compensated.
  • the balancing mass is to be arranged at a suitable location on the fan blades or the fan wheel shaft. Particularly recommended is the provision of a balancing mass on the fan blades radially inside or on the fan wheel itself.
  • the occurrence of unwanted imbalances can also be counteracted by the fact that the individual fan blades are each equipped with an individual mass distribution, such that the asymmetric, ie non-uniform arrangement of the fan blades along the circumferential direction of the fan wheel is partially or completely compensated.
  • an embodiment may be considered advantageous, in which the individual holding elements are each formed in the manner of a holding strut, which are each supported with a radially outer end portion on the housing and attached to a radially inner end portion on the base member of the holding device.
  • a particularly simple mounting of the along the circumferential direction asymmetrically arranged holding elements on the base element of the holding device allows a preferred embodiment in which for each holding element from the base element radially outwardly projecting receiving collar is provided, in which a respective holding element can be accommodated with its radially inner end portion.
  • At least two retaining struts can be formed differently curved. This leads, in particular in combination with the above-explained measures, to a further reduced noise development of the hair dryer.
  • this form in an aerodynamically particularly favorable drop shape.
  • a wrapping device which has a substantially teardrop-shaped geometric shape in a defined along the axis of rotation longitudinal section of the hair dryer.
  • all retaining struts are provided with such a teardrop-shaped envelope.
  • a metal or a plastic is recommended, in the latter case, silicone proves to be particularly advantageous.
  • An additional attenuation of the operationally generated noise can be achieved if at least in sections, preferably completely on this, a structuring is provided on an outer surface of the wrapping device.
  • This may include, for example, a plurality of recesses or elevations, which are to be applied, for example, pattern-like or grid-like on the outer surface.
  • FIG. 1 illustrates in cross-section a hair dryer according to the invention 1.
  • This comprises a sufficiently sized and in FIG. 1 only schematically indicated housing 3.
  • the housing 3 defines a housing interior 4, in which a fan 2 for generating an air flow relative to the housing 3 along a direction of rotation R is rotatably mounted about a rotation axis D.
  • the in FIG. 1 shown cross-section refers to a cross-sectional plane which is orthogonal to the axis of rotation D, ie, the axis of rotation D extends into FIG. 1 perpendicular to the drawing plane.
  • FIG. 2 shows the hairdryer the FIG. 1 in a longitudinal section along the axis of rotation D.
  • the fan 2 comprises a coaxial with the axis of rotation D extending fan wheel shaft 5 and a first number N 1 of fan blades 6. These are along a circumferential direction U, which corresponds to the direction of rotation R of the fan wheel 5, on the fan wheel shaft 5 are provided and are each radially outwardly from this.
  • the fan blades 6 are in the FIG. 1 shown in simplified form and in variants can also have a more complex geometric shape.
  • the hair dryer 1 has to support the fan 2 on the housing 3 a fixed to the housing 3 in the housing interior 4 arranged fan wheel-holding device 7.
  • This comprises a base member 8, for example in the form of a hub or other suitable storage device on which the Fan wheel shaft 5 of the fan 2 is rotatably mounted in the direction of rotation R.
  • the fan wheel holding device 7 comprises a second number N 2 of holding elements 9, which may be formed as holding struts 10.
  • the holding elements 9 may also be formed by elements known to those skilled in the so-called "micanite" cross on the micanite surfaces electric heating wires for heating the air flowing through the hair dryer 1 may be wound (not shown).
  • the individual holding elements 9 are arranged in the direction of rotation R or circumferential direction U of the fan wheel shaft 5 and are in the cross section of the hair dryer 1 each radially outwardly from the base member 8 from. With a radially inner end portion 11 (see. Fig. 2 ), the holding elements 9 are supported on the base element 8, with a radially outer end portion 12 on the housing 3.
  • the holding elements 9 may be integrally formed on the base member 8 and / or on the housing 3.
  • the first number N 1 of fan blades 6 is now different from the second number N 2 of the holding elements 9 of the fan wheel holding device 7.
  • the first number N 1 of fan blades 6 is now different from the second number N 2 of the holding elements 9 of the fan wheel holding device 7.
  • U adjacent fan blades 6 are arranged at a respective fan blade angular distance ⁇ to each other. Accordingly, two adjacent holding elements 9 are arranged at a respective holding element-angular distance ⁇ to each other.
  • the two angles ⁇ , ⁇ are in FIG. 1 exemplified for a pair of adjacent fan blades 6 and a pair of adjacent retaining elements.
  • the FIG. 1 illustrates vividly that the values of the fan blade angular distances ⁇ not for all pairs of adjacent fan blades. 6 is identical, but varies. For example, the in FIG. 1 drawn fan blade angular distance ⁇ 1 greater than the fan blade angular distance ⁇ 2 . In the in FIG. 1 Thus, the values of at least two fan blade angular intervals ⁇ 1, ⁇ 2 are different. The same applies to the values of two holding element angular distances ⁇ .
  • not only two fan blade angular distances ⁇ may have different values, but all values of the existing fan wheel angular distances ⁇ may be different from each other. In this way, a geometrically particularly non-uniform arrangement of the individual fan blades 6 along the circumferential direction U of the fan wheel shaft 5 is achieved, which leads to an additional reduction of the noise development.
  • different values for all holding element angular distances ⁇ can accordingly also be selected in each case. This also applies to the in FIG. 1 shown example. In this way, the operationally generated noise level of the hair dryer 1 can be lowered again.
  • a balancing mass 13 can be provided on the fan wheel shaft 5 and / or on at least one fan blade 6. Such is in FIG. 1 exemplarily formed on a single fan blades 6, which in FIG. 1 for the sake of clarity only schematically indicated.
  • the balancing mass 13 is designed such that during the rotational movement of the fan 5 about the rotation axis D no imbalance is generated.
  • the balancing mass 13 is attached to the fan blades 6 or the fan wheel shaft 5 at a suitable location.
  • the attachment of the balancing mass 13 on the respective fan blade 6 is recommended radially inward - this is in FIG. 1
  • a balancing mass can be provided.
  • the occurrence of undesired imbalances can also be counteracted by equipping the individual fan blades 6 with an individual mass distribution in each case.
  • FIG. 3 illustrates a further variant of a hair dryer according to the invention 1 in a cross section orthogonal to the axis of rotation D of the fan wheel 2.
  • the support struts 10 are curved in the radial direction.
  • Experimental investigations in conjunction with computer-aided simulations have shown that in this way further noise reduction can be achieved.
  • a particularly good noise suppression is achieved, however, if as in FIG. 3 shown all curved support struts 10 have the same direction of curvature.
  • only individual holding elements 10 and not, as in FIG. 1 illustrated, all holding elements 10 are formed curved.
  • at least two holding struts 10 adjacent to one another in the circumferential direction U may have mutually opposite directions of curvature (not shown).
  • FIG. 4 shows an example of a Lüfterrad-holding device 7 with a base member 8, which has a star-shaped geometry in cross section. It can be seen that for each of the five holding elements 9 on the base element 8 a radially outwardly projecting, in cross-section U-shaped receiving collar 14 is provided, in each of which a holding element 9 can be inserted. This facilitates the assembly of the retaining elements 9 on the base element 8 FIG. 4 As shown, the angle ⁇ is the same for all pairs of adjacent holding elements 9. It is understood, however, that by training and / or arrangement of the receiving collar 14 along the Circumferential direction U or the direction of rotation R and different values for the individual angle ⁇ can be realized.
  • the individual holding elements formed as holding struts 10 9 can be formed in an aerodynamically particularly favorable drop shape.
  • the reduction of the flow resistance is accompanied by a reduction of the noise.
  • An example of such a scenario shows the FIG. 5
  • An encasing device 15 is provided on at least one retaining strut 10 and has a substantially teardrop-shaped geometric shape in a longitudinal section of the hair dryer 1 defined along the axis of rotation D.
  • An additional attenuation of the operationally generated noise can be achieved if at least in sections, preferably completely on this, a structuring is provided on an outer surface of the wrapping device 15.
  • This may comprise a plurality of recesses or elevations, for example, to be patterned or grid-like manner on the outer surface to be mounted (not shown).
  • a metal or a plastic is recommended, in the latter case in particular silicone.
  • the aerodynamically advantageous embodiment of the retaining struts 10 in teardrop shape can also be adopted for the design of the struts of an air grille provided on the housing 3, through which the air moved by the fan wheel can emerge again from the hair dryer 1.

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  • Cleaning And Drying Hair (AREA)
EP15174561.9A 2014-07-09 2015-06-30 Sèche cheveux Not-in-force EP2965651B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014213389.0A DE102014213389A1 (de) 2014-07-09 2014-07-09 Haartrockner

Publications (2)

Publication Number Publication Date
EP2965651A1 true EP2965651A1 (fr) 2016-01-13
EP2965651B1 EP2965651B1 (fr) 2017-08-09

Family

ID=53491419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15174561.9A Not-in-force EP2965651B1 (fr) 2014-07-09 2015-06-30 Sèche cheveux

Country Status (2)

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EP (1) EP2965651B1 (fr)
DE (1) DE102014213389A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019364A (zh) * 2016-11-04 2018-05-11 全亿大科技（佛山）有限公司 风扇及具有该风扇的电子装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093526A (en) * 1978-01-10 1982-09-02 Conair Hand held hair dryers
EP1103202A1 (fr) * 1999-06-08 2001-05-30 Sanyo Electric Co., Ltd. Seche-cheveux

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005015411U1 (de) * 2005-09-30 2006-02-23 Cheng, Tsung-Yi, Tai Shan Hsiang Wärmeausstoßende Vorrichtung mit einer Luftleitung
FR2926704B1 (fr) * 2008-01-25 2013-02-01 Velecta Paramount Silencieux pour appareil de sechage et seche-cheveux silencieux
KR101256759B1 (ko) * 2011-08-19 2013-04-23 홍원배 헤어드리이기

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093526A (en) * 1978-01-10 1982-09-02 Conair Hand held hair dryers
EP1103202A1 (fr) * 1999-06-08 2001-05-30 Sanyo Electric Co., Ltd. Seche-cheveux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019364A (zh) * 2016-11-04 2018-05-11 全亿大科技（佛山）有限公司 风扇及具有该风扇的电子装置

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Publication number Publication date
DE102014213389A1 (de) 2016-01-14
EP2965651B1 (fr) 2017-08-09

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