EP0008478A1 - Sèche-cheveux et procédé de fabrication d'un élément chauffant pour ce sèche-cheveux - Google Patents

Sèche-cheveux et procédé de fabrication d'un élément chauffant pour ce sèche-cheveux Download PDF

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Publication number
EP0008478A1
EP0008478A1 EP79200447A EP79200447A EP0008478A1 EP 0008478 A1 EP0008478 A1 EP 0008478A1 EP 79200447 A EP79200447 A EP 79200447A EP 79200447 A EP79200447 A EP 79200447A EP 0008478 A1 EP0008478 A1 EP 0008478A1
Authority
EP
European Patent Office
Prior art keywords
hair dryer
support body
following
dryer according
strip
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.)
Withdrawn
Application number
EP79200447A
Other languages
German (de)
English (en)
Inventor
Rolf Stühler
Charles Christopher Packham
Raymond Graham Parsonage
Rudolf Majthan
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 EP0008478A1 publication Critical patent/EP0008478A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
    • 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
    • A45D20/38—Arrangement of the electric heating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49083—Heater type

Definitions

  • the invention relates to a hair dryer with a fan wheel driven by an electric motor and an electric heater. Furthermore, the invention relates to a method for producing the radiator for this hair dryer.
  • Hair dryers of the type mentioned at the outset have been in common use for many years. In order to design such hair dryers so that they can be handled as comfortably as possible, they should be as light and compact as possible. The small dimensions are also useful because hair dryers are often taken on trips and should therefore take up as little space in the suitcase as possible.
  • the electric heater is located behind the fan wheel in front of the air outlet.
  • a considerable length is required between the fan wheel and the end of the air outlet so that the radiator can be accommodated and so that the air flow has sufficient time to swirl intensely so that as few air streaks as possible of different temperatures occur.
  • the invention has for its object to develop a hair dryer that is as compact as possible, light in weight and has a uniform temperature distribution in the air outlet and which is nevertheless inexpensive to manufacture. Furthermore, a simple and inexpensive method for producing a radiator for the hair dryer according to the invention is to be demonstrated.
  • the first object is achieved according to the invention in that the electric heating element is arranged on the outside around the electric motor.
  • the fan wheel determines the diameter of the housing based on the required delivery rate.
  • This hanging space is used by the invention for the arrangement of the electric radiator. Therefore, the hair dryer according to the invention is very compact. Because the air passes through this annulus with high Velocity flows, a good heat transfer from the radiator to the air is possible, so that the electric radiator can work with a high surface load.
  • the high air speed also prevents excessive heating of the housing of the hair dryer, which is usually made of plastic.
  • the electric radiator has a support body made of a material with the lowest possible heat storage capacity.
  • the heat storage capacity of the radiator is so low that after switching off the hair dryer, the fan wheel that is running out can still allow enough air to flow over the radiator to cool it down so that it does not then cool down overheating of the housing.
  • Mekanit is a mica material held together with silicone binder.
  • the electric heater has a hollow-column-shaped support body.
  • the support body is a cylinder, in the circumferential surface of which several groups of one above the other are distributed over the circumference a helix Slits are provided, through which a heating coil wound around the cylinder runs like a sinew through the inner contour of the cylinder.
  • an air guide wheel is connected upstream of the fan wheel in the housing of the hair dryer.
  • the air flow can be directed before reaching the fan wheel so that it flows in the axial direction behind the fan wheel.
  • the fan wheel can be mounted with a very short, flying shaft.
  • the electric heating element is held between two supporting grids which are fastened in the housing of the hair dryer. It is also favorable in terms of production technology if the air inlet-side support grid is at the same time a holder for the electric motor.
  • a separate outlet grille can be saved if, according to another embodiment of the invention, the support grille on the air outlet side is at the same time outlet grille.
  • a particularly robust and yet inexpensive design is achieved if the radiator is as long as the electric motor and both support grids serve both to hold the radiator and the electric motor.
  • an air guide wheel is provided between the fan wheel and the electric heating element, then a particularly uniform axial flow is achieved in the annular space between Electric motor and housing and thus a particularly uniform temperature distribution in the air flow emitted by the liaar dryer.
  • the electric motor can be supplied with power via a contact lug which is connected directly to the winding of the electric radiator.
  • a circuit breaker for the electric heater is provided on the circuit board of the hair dryer, which is arranged in the region of the handle of the hair dryer approximately on the contour of the inner diameter of the housing.
  • the circuit breaker is arranged at a distance from the radiator in which the housing to be protected also extends. On the one hand, this effectively protects the housing, and on the other hand it prevents the radiator from being switched off unnecessarily early.
  • the support body is advantageously formed from a flat strip of material which was bent into a cylinder after being wrapped with the heating wire.
  • the winding can do better on the flat strip of material be applied by machine than on a closed cylinder; therefore this design of the support body is particularly favorable.
  • connection rivets have a double function in this embodiment. They are on the one hand a fastening element for the support body bent from a strip of material, and on the other hand a connecting terminal for the electrical lines.
  • the connecting rivets have two arms which run in a V-shape and are angled towards the supporting body.
  • the heating wire can be clamped well on these arms, on the one hand, and the wire to be connected, on the other hand.
  • the flat material strip for the cylindrical support body is bent into a cylinder between two bending rollers before the final bending, but then brought back into a flat shape for winding the heating wire has been.
  • the material to be preferably used, mekanite is too stiff to be brought into the desired cylindrical shape.
  • a particularly uniform bending to a cylindrical support body can be achieved if the material strip for the cylindrical support body was bent before the final bending into a cylinder between two thin sheets between two bending rollers, but then brought back into a flat shape.
  • the heating body can also be produced in that the supporting body is formed from flat supporting plates, each of which forms partial surfaces of a prismatic column, and in that the supporting body is wrapped on the outside by a heating wire.
  • the heating wire is provided in the form of axially extending heating coils on the outer surface of a first support body and on the inner surface of a second support body coaxially surrounding the first support body is.
  • This bending is particularly easy if, according to an embodiment of the method, at least one of the two bending rollers is corrugated in the longitudinal direction.
  • This corrugation causes the strip of material to be slightly corrugated so that it is easier to bend on lines defined by the corrugation.
  • a particularly uniform curvature when producing the cylindrical support body is obtained according to a special process measure, which consists in placing the strip of material between two sheets and then bending it by means of the bending rollers.
  • FIG. 1 shows a housing 1 of a hair dryer with an air outlet 2 and an air inlet grille 3.
  • an electric motor 4 which drives a fan wheel 5.
  • an air guide 6 is arranged, through which the air inlet direction in the fan wheel is influenced so that behind the fan wheel in housing 1 between the housing 1 and the motor 4, a well-directed, axial flow arises.
  • a heating element 7 is arranged, which is shown in more detail in FIGS. 2, 3 and 3.
  • the heating element 7 has a support body 8 ärme Eatkapaztician of an electrically insulating material with the lowest possible W, for example Mekanit.
  • the support body has the shape of a hollow cylinder and, as FIG. 4 shows, has three groups of slots 9 arranged one above the other. These slots 9 lie on a helix, so that a heating coil 10 protrudes into the slots when it is wound helically on the outside of the support body 8.
  • the slots 9 make it possible for the heating coil 10, as shown in FIG. 2, to protrude into the inner contour of the support body 8, so that the air stream flowing past the motor 4 comes into intimate contact with the heating coil 10 and a good heat exchange is therefore possible .
  • the radiator 7 is fastened in the housing 1 by means of two support grids 11 and 12.
  • the support grille 11, which faces the air inlet grille 3, serves at the same time to hold the electric motor 4.
  • the hairdryer also has a housing 15 with an air outlet 16.
  • an air outlet grille 17 is arranged in the interior of the housing 15, which prevents a user from reaching into the housing 15.
  • An electric motor 19 arranged inside the housing 15 drives a fan wheel 2U. Between the fan wheel 20 and the electric motor 19, an air guide wheel 21 is arranged, through which the air moved by the fan wheel 20 is axially directed so that it flows in the axial direction through the annular space between the electric motor 19 and the housing 15.
  • An annular heating element 22 is again arranged in the annular space and is held by two supporting grids 23, 24.
  • the heater 22 has a support body 25 of hollow cylindrical shape, over which the heating wire 26 is wound.
  • the guide wire 26 is wound as in the radiator according to DE-OS 25 30 075.
  • FIG. 5 also shows a contact tab 27, which is connected on the one hand to the heating wire 26 and on the other hand leads directly to the electric motor 19. This feature can be seen more clearly in FIG.
  • FIG. 5 also shows a circuit breaker 29 which is mounted on a circuit board 28 in the handle 30 of the hair dryer.
  • This circuit breaker 29 is used to switch off its power supply when the heater 22 overheats. It is arranged approximately on the inner contour of the housing 15, so that it is located exactly at the point where damage occurs when the temperature rises.
  • the supporting body 25 is bent from a strip of material which is held together by two rivets 31, 32 to form a cylindrical body.
  • these rivets 31, 32 not only hold the support body 25 together, they also clamp the heating wire 26 on the one hand, and the line leading to the heating body 22 on the other hand.
  • FIG. 8 and 9 show another possible embodiment of the radiator.
  • This has a support body 4U, which is formed from three support plates 41, 42 and 43.
  • the support plates form partial surfaces of a prismatic column, which is formed by a heating coil 44 is wrapped around the outside. Since the support plates 41, 42, 43 only represent partial areas, the heating coil 44, as shown in FIG. 9, protrudes into the inner contour of the triangular cross section formed by the support plates 41, 42, 43, so that there is good contact of the air flow with the heating coil 44 given is.
  • FIGS. 10 and 11 again show another possible embodiment of the radiator.
  • This has a first hollow cylindrical support body 48, which is surrounded by a second hollow cylindrical support body 49.
  • Heating coils 51 are arranged on the outer lateral surface of the first support body 48 in the longitudinal direction of the heating body.
  • Corresponding heating coils 52 are arranged in the longitudinal direction on the inner circumferential surface of the outer support body 49.
  • the heater according to FIGS. 10 and 11 is arranged in the housing of the hair dryer in such a way that the air to be heated flows exclusively between the two support bodies 48, 49. This provides particularly good protection for the electric motor and the housing of the hair dryer from overheating.

Landscapes

  • Cleaning And Drying Hair (AREA)
  • Hair Curling (AREA)
EP79200447A 1978-08-26 1979-08-14 Sèche-cheveux et procédé de fabrication d'un élément chauffant pour ce sèche-cheveux Withdrawn EP0008478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2837316 1978-08-26
DE19782837316 DE2837316A1 (de) 1978-08-26 1978-08-26 Haartrockner und verfahren zum herstellen eines heizkoerpers fuer diesen haartrockner

Publications (1)

Publication Number Publication Date
EP0008478A1 true EP0008478A1 (fr) 1980-03-05

Family

ID=6047971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200447A Withdrawn EP0008478A1 (fr) 1978-08-26 1979-08-14 Sèche-cheveux et procédé de fabrication d'un élément chauffant pour ce sèche-cheveux

Country Status (8)

Country Link
US (1) US4300280A (fr)
EP (1) EP0008478A1 (fr)
DE (1) DE2837316A1 (fr)
ES (1) ES483974A1 (fr)
FR (1) FR2457655A1 (fr)
GB (2) GB2044612B (fr)
NL (1) NL7915041A (fr)
SE (1) SE8003841L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514618A (en) * 1978-08-26 1985-04-30 Braun Ag Compact electric hair dryer
FR2598847A1 (fr) * 1986-05-13 1987-11-20 Hennequin Cie Ets Dispositif electrique de resistances de charge a ventilation forcee
CN102355758A (zh) * 2011-09-15 2012-02-15 杨昌良 电吹风发热体

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2901420C2 (de) * 1979-01-15 1984-10-18 Fa. Fritz Eichenauer, 6744 Kandel Heizkörper für elektrische Warmluftgeräte
DE3319605A1 (de) * 1983-05-30 1984-12-06 Siemens AG, 1000 Berlin und 8000 München Sensor mit polykristallinen silicium-widerstaenden
DE3428650C2 (de) * 1984-08-03 1986-08-14 Braun Ag, 6000 Frankfurt Haartrockner mit Axialgebläse
US4647757A (en) * 1985-04-30 1987-03-03 Clairol Incorporated Hair dryer heater section providing uniform outlet air temperature distribution
DE3616405A1 (de) * 1986-05-15 1987-11-19 Braun Ag Heizkoerper
US4794225A (en) * 1987-10-09 1988-12-27 Maese Hector L Tube axial handheld blow dryer for hair
DE19634420C2 (de) * 1996-08-26 2000-10-26 Braun Gmbh Elektrische Heizeinrichtung und elektrischer Haartrockner
DE102005034499B4 (de) * 2005-07-20 2011-03-31 Wickeder Westfalenstahl Gmbh Presspaketaufbau zum Verpressen von Multilayern bzw. Presse zur Verpressung bzw. Herstellung von Multilayern
US20070278204A1 (en) * 2006-06-06 2007-12-06 Yu-Lin Chen Hair dryer
GB2516249B (en) * 2013-07-16 2017-03-01 Dyson Technology Ltd Heater for a hand held appliance
GB2534176B (en) * 2015-01-15 2018-08-08 Dyson Technology Ltd Motor mount
GB2543751B (en) 2015-10-21 2019-04-24 Dyson Technology Ltd Motor mount

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1401500A (en) * 1919-10-17 1921-12-27 Scott Oliver Perry Electric heater
GB329064A (en) * 1929-03-06 1930-05-15 John William Guest Pearson Improvements in heating elements for electric stoves, radiators, and the like
US1778811A (en) * 1928-12-10 1930-10-21 Young Osmond & Young Ltd Electric heating apparatus and resistance units therefor
DE662078C (de) * 1934-03-14 1938-07-16 Gustav Behrmann Als Handgeraet ausgebildetes, elektrisch betriebenes Warmluftgeblaese
FR923064A (fr) * 1946-02-11 1947-06-26 Perfectionnements aux fixations et emplacements des résistances électriques pour le chauffage de l'air dans les séchoirs à cheveux et autres
GB647291A (en) * 1948-01-14 1950-12-13 Frederick George Cooke Improvements relating to electric hair driers
US2536925A (en) * 1949-04-18 1951-01-02 Oster John Mfg Co Nozzle construction for hair driers
DE856927C (de) * 1951-02-16 1952-11-24 Siemens Ag Heissluftdusche, insbesondere Haartrockner
US2978563A (en) * 1958-06-12 1961-04-04 Tuttle Electric Products Inc Exposed resistance electric heater
FR1287870A (fr) * 1961-04-25 1962-03-16 Aspirateurs Samy S N A S Soc N Sèche-cheveux
BE677737A (fr) * 1965-03-16 1966-08-01
US3383700A (en) * 1965-11-26 1968-05-14 Ronson Corp Portable hair dryer
DE1628221B1 (de) * 1967-07-14 1971-05-06 Bremshey & Co Gebläse, insbesondere zum haartrocknen
DE2307066A1 (de) * 1973-02-14 1974-08-22 Severin & Co Gmbh A Geraet zum trocknen von haaren
FR2317848A1 (fr) * 1975-07-05 1977-02-04 Schehr Ingo Element chauffant electrique pour milieux gazeux
GB1525179A (en) * 1977-03-30 1978-09-20 Gillette Co Hair dryer
FR2409655A1 (fr) * 1977-10-07 1979-06-15 Gillette Co Elements chauffants electriques, par exemple pour seche-cheveux

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864929A (en) * 1957-03-14 1958-12-16 Thermal Mfg Company Heater
US3680207A (en) * 1971-01-28 1972-08-01 Corning Glass Works Method of making electrical heating units
US3904851A (en) * 1972-10-05 1975-09-09 Separex Sa Electric heater for heating a fluid medium
US4092626A (en) * 1972-10-13 1978-05-30 Patentkonsortiet Robert Meinich & Co. Continuous web consisting of resistance foil material between two insulating foil layers and method for the production of such webs
GB1440932A (en) 1972-11-17 1976-06-30 Firth Cleveland Ltd Hair dryer
US3903904A (en) * 1973-01-16 1975-09-09 Sunbeam Corp Heated comb with mist feature
US4100673A (en) * 1977-05-05 1978-07-18 Leavines Joseph E Method of making high temperature parallel resistance pipe heater

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1401500A (en) * 1919-10-17 1921-12-27 Scott Oliver Perry Electric heater
US1778811A (en) * 1928-12-10 1930-10-21 Young Osmond & Young Ltd Electric heating apparatus and resistance units therefor
GB329064A (en) * 1929-03-06 1930-05-15 John William Guest Pearson Improvements in heating elements for electric stoves, radiators, and the like
DE662078C (de) * 1934-03-14 1938-07-16 Gustav Behrmann Als Handgeraet ausgebildetes, elektrisch betriebenes Warmluftgeblaese
FR923064A (fr) * 1946-02-11 1947-06-26 Perfectionnements aux fixations et emplacements des résistances électriques pour le chauffage de l'air dans les séchoirs à cheveux et autres
GB647291A (en) * 1948-01-14 1950-12-13 Frederick George Cooke Improvements relating to electric hair driers
US2536925A (en) * 1949-04-18 1951-01-02 Oster John Mfg Co Nozzle construction for hair driers
DE856927C (de) * 1951-02-16 1952-11-24 Siemens Ag Heissluftdusche, insbesondere Haartrockner
US2978563A (en) * 1958-06-12 1961-04-04 Tuttle Electric Products Inc Exposed resistance electric heater
FR1287870A (fr) * 1961-04-25 1962-03-16 Aspirateurs Samy S N A S Soc N Sèche-cheveux
BE677737A (fr) * 1965-03-16 1966-08-01
US3383700A (en) * 1965-11-26 1968-05-14 Ronson Corp Portable hair dryer
DE1628221B1 (de) * 1967-07-14 1971-05-06 Bremshey & Co Gebläse, insbesondere zum haartrocknen
DE2307066A1 (de) * 1973-02-14 1974-08-22 Severin & Co Gmbh A Geraet zum trocknen von haaren
FR2317848A1 (fr) * 1975-07-05 1977-02-04 Schehr Ingo Element chauffant electrique pour milieux gazeux
GB1525179A (en) * 1977-03-30 1978-09-20 Gillette Co Hair dryer
FR2409655A1 (fr) * 1977-10-07 1979-06-15 Gillette Co Elements chauffants electriques, par exemple pour seche-cheveux

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514618A (en) * 1978-08-26 1985-04-30 Braun Ag Compact electric hair dryer
FR2598847A1 (fr) * 1986-05-13 1987-11-20 Hennequin Cie Ets Dispositif electrique de resistances de charge a ventilation forcee
CN102355758A (zh) * 2011-09-15 2012-02-15 杨昌良 电吹风发热体

Also Published As

Publication number Publication date
DE2837316A1 (de) 1980-03-13
ES483974A1 (es) 1980-09-01
FR2457655B1 (fr) 1985-04-05
GB2044612A (en) 1980-10-22
GB2044612B (en) 1983-06-15
FR2457655A1 (fr) 1980-12-26
NL7915041A (nl) 1980-08-29
GB2110510A (en) 1983-06-15
SE8003841L (sv) 1980-05-22
US4300280A (en) 1981-11-17
GB2110510B (en) 1983-12-21

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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STAA Information on the status of an ep patent application or granted ep patent

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAJTHAN, RUDOLF

Inventor name: PACKHAM, CHARLES CHRISTOPHER

Inventor name: PARSONAGE, RAYMOND GRAHAM

Inventor name: STUEHLER, ROLF