EP0518035A2 - Sèche-cheveux - Google Patents

Sèche-cheveux Download PDF

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Publication number
EP0518035A2
EP0518035A2 EP92107005A EP92107005A EP0518035A2 EP 0518035 A2 EP0518035 A2 EP 0518035A2 EP 92107005 A EP92107005 A EP 92107005A EP 92107005 A EP92107005 A EP 92107005A EP 0518035 A2 EP0518035 A2 EP 0518035A2
Authority
EP
European Patent Office
Prior art keywords
hair dryer
detection means
housing
dryer according
temperature sensor
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
EP92107005A
Other languages
German (de)
English (en)
Other versions
EP0518035B1 (fr
EP0518035A3 (fr
Inventor
Rüdiger Fell
Wilfried Rolf
Boris Wonka
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 EP0518035A2 publication Critical patent/EP0518035A2/fr
Publication of EP0518035A3 publication Critical patent/EP0518035A3/fr
Application granted granted Critical
Publication of EP0518035B1 publication Critical patent/EP0518035B1/fr
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
    • 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
    • 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
    • A45D2200/00—Details not otherwise provided for in A45D
    • A45D2200/15—Temperature

Definitions

  • the invention relates to a hair dryer with a housing which has an air inlet opening and an air outlet opening for an air flow, a fan and a heater being arranged in the housing and a filter element being associated with the air inlet opening.
  • Such a hair dryer from the applicant has long been on the market under the type designation PFV 1600.
  • These devices have proven themselves in practical use, not least because of the filter element arranged in the air inlet opening, which removes the sucked-in air from foreign particles, such as. e.g. Hair, freed, is due.
  • the filter element can be easily changed or cleaned using a removable air inlet grille.
  • the invention is therefore based on the object of developing a hair dryer of the known type in such a way that impermissibly heavy contamination or clogging of the filter element is avoided.
  • detection means are provided in the housing, which generate an output signal that is dependent on at least one temperature in the housing and to which a signal device is assigned, which can be actuated when a predefinable threshold value level of the output signal is reached, advantageously becomes abnormal if one is present high temperature in the hairdryer housing or due to a blockage of the filter element actuated a signaling device. Since the detection means react to the actual internal temperature of the housing, the output signal is independent of the respectively set air or heating level, so that fluctuations in the mains voltage are also compensated for.
  • the hair dryer is operated at low air or heating levels or the mains voltage drops below the nominal voltage, the internal temperatures are lower with the same degree of contamination of the filter element and are therefore no longer critical.
  • the signaling device is also not operated in this case. The signaling device is only actuated when the degree of soiling rises so much that the temperatures reach impermissibly high values. The reverse effect occurs when the supply voltages are too high. In this case, a degree of contamination, which is lower than that at the nominal voltage, is sufficient to bring about inadmissibly high interior temperatures, so that the signaling device is actuated accordingly earlier.
  • a particularly advantageous embodiment consists in the detection means having a temperature sensor, in particular a PTC element.
  • the resistance of this temperature sensor or PTC element depends on the respective ambient temperature.
  • the change in the resistance of the PTC element or temperature sensor or the voltage drop occurring at this element can easily be used as an output signal and can be used to actuate the signaling device when a certain preset threshold value is exceeded or undershot.
  • Optical signal elements such as light-emitting diodes or glow lamps, or acoustic signal elements are preferably used as the signaling device.
  • the detection means are assigned to the heating of the hair dryer and in particular attached to a heating support.
  • the detection means are designed as a series connection of a series resistor and a PTC element, to which an optical signal element, in particular a glow lamp, is connected in parallel.
  • the threshold value at which the signal element signals impermissibly high temperatures can be set by appropriately selecting the dimensioning of the common series resistor, the type of glow lamp and the characteristic of the PTC element.
  • the PTC element has a relatively low resistance, so that the voltage applied to the glow lamp is not sufficient to ignite the glow lamp.
  • the resistance of the PTC element changes to high-resistance values, so that the voltage applied to the glow lamp increases and causes it to light up.
  • the respective switching point depends on the special dimensioning of the elements and is at the discretion of the responsible specialist.
  • the threshold value level for the signaling device is set below Limit temperature values set. This advantageously prevents the thermal switch from switching off the hairdryer when the limit temperature is reached, without the user having been informed beforehand by the signaling device of the excessive degree of contamination of the filter element.
  • the embodiment according to the invention proves to be extremely advantageous to arrange the detection means in a section of the housing in the region of the fan.
  • the air flowing past cools the temperature sensor, which is heated, for example, by means of a separate heater.
  • the separate heater or the temperature sensor experiences a stronger cooling in the case of a dirty filter element than in the case of unpurified filter elements.
  • This is apparently due to the fact that an extremely strong vortex formation occurs in the area of the suction side of the hair dryer when the flow resistance on the air inlet side exceeds certain values. Due to this effect of a strong change in the flow conditions, an accurate detection of the degree of contamination of the filter element is possible.
  • the detection means are arranged in a section of the housing between the filter element and the blower, in particular the fan wheel.
  • the flow change is particularly noticeable due to a dirty filter element in this housing section and is therefore easier to detect by means of the detection device.
  • the detection means are formed from a heating element and a temperature sensor, which are thermally coupled to one another.
  • the sensitivity of the detection means is significantly increased by assigning a separate heater to the temperature sensor.
  • a particularly favorable embodiment of the invention results from the fact that the heating element and the temperature sensor are each designed as a PTC element and are directly attached to one another or connected to one another, a signal element being connected in series with the temperature sensor. If the heating and thus also the temperature sensor is cooled more strongly due to eddy formation in the section assigned to the blower than if an uncleaned filter element is present, the resistance of the temperature sensor designed as a PTC element drops, as a result of which an increased current can flow through it and a signal element, for example puts a light emitting diode or an acoustic warning device, for example a piezo buzzer, into operation.
  • integration means are assigned to the detection means, which hide the output signals which would only bring about a brief actuation of the signaling device, does not indicate that there is only an impermissible operating state of the hair dryer for a short time. Such situations can occur briefly, for example, when switching from one blower stage to the other, when the hair dryer is switched on or when the heating level is changed, without this being attributable to the filter element being too dirty. Such short-term conditions are normal and should not be indicated to the user by the flickering of the signal lamp or by the signal device briefly sounding.
  • the integration means ensure that these signals are masked out, the integration time constant preferably being in the range between 0.25 and 5 minutes.
  • a hair dryer 10 consists of a tubular housing 12 which is provided with a handle 14.
  • the tubular housing 12 has an air inlet opening 16 and an air outlet opening 18 at each end.
  • a filter element 20 is arranged between a cover cap 19 of the air inlet opening 16 and a blower 21, which has a fan wheel 22, a fan motor 24 and a downstream guide wheel 26. Downstream of the guide wheel 26, a heater 27 is fixed in the housing 12, which consists of a heater support 28 which is wound in a meandering shape with heating wire 30.
  • the detection means 32 are connected to a connection 42 of a signal device 40, as indicated in a simplified manner by means of the connection 36.
  • the signal device 40 can be configured as an optical or acoustic signal element, the arrangement on the hair dryer 10 is arbitrary and depends on the available space or the visibility of the optical display.
  • the arrangement of a detection means 34 shown in broken lines in the housing section between the filter element 20 and the fan wheel 22 is indicated.
  • the positioning shown in the figure is of an exemplary nature, the exact arrangement of the detection means 34 depends on the special flow conditions of the respective hair dryer in this section in the area of the blower 21.
  • the detection means 34 is also provided with a connection 38 which is connected to a connection 42 of the Signal device 40 is connected.
  • the detection means 32 of FIG. 2a has a temperature sensor 44, which can be designed in particular as a PTC element.
  • a signal element 48 which in the exemplary embodiment is designed as a glow lamp. This parallel connection of the temperature sensor 44 and the signal element 48 is connected via a series resistor 52 to the connections 58 of a supply voltage.
  • the temperature sensor 44 which is arranged in the area of the heater 27, which in turn is connected to the voltage supply via supply connections 54, is heated to the temperature prevailing in the housing 12 of the hair dryer 10 as a function of the heating stage and the blower stage. Due to the dimensioning of the components used, the circuit is dimensioned such that, in the presence of permissible temperatures, the resistance of the temperature sensor 44 designed as a PTC element assumes relatively low values, so that the voltage drop that occurs does not suffice to ignite the glow lamp 48. However, if there is a filter element 20 with a high degree of contamination, the air supplied to the heater is throttled, so that the temperature detected rises. The resistance of the temperature sensor 44 and the voltage drop across it rises until the point is reached where the glow lamp 48 ignites. The exact switching point can be achieved, for example, by suitable dimensioning of the series resistor 52 and selection of a PTC resistor with a suitable characteristic.
  • the detection means 34 which is arranged in the housing section between the filter element 20 and the blower 21, is designed as follows:
  • the temperature sensor 44 which is also designed as a PTC element, is in series with a signal element 50 switched, this series connection being connected to the supply voltage via connections 58.
  • An independent heating element 46 is assigned to the temperature sensor 44, both of which are connected to one another via a thermal coupling 56.
  • the temperature sensor 44 and the heating element 46 form a structural unit.
  • the heating element 46 is also preferably designed as a PTC element and is connected to the supply voltage via supply connections 54.
  • the temperature sensor 44 is operated by the heating element 46 by suitably selecting the characteristics of both elements in a high-resistance range, so that the signal element 50, which is designed, for example, as a light-emitting diode or incandescent lamp, is not put into operation.
  • the signal element 50 which is designed, for example, as a light-emitting diode or incandescent lamp.
  • the flow conditions between the filter element 20 and the fan wheel 22 surprisingly change very strongly due to eddy formation. This vortex formation leads to an increased cooling of the heating element 46 and thus a decrease in the temperature of the temperature sensor 44. This experiences a reduction in its resistance, as a result of which the signal element 50 is actuated.
  • FIGS. 2a, 2b Both configurations of FIGS. 2a, 2b have in common that an integration means 60 can be assigned to the detection means 32, 34, which fades out output signals of the temperature sensor 44, which would only lead to a brief actuation of the signal elements 48, 50. This suppresses normal, short-term temperature variations of the temperature sensor 44, which would lead to the signal device 40 being actuated. Only when these temperature changes are present over a longer period do they cause the signal device 40 to be actuated.
  • Preferred time constants of the integration means 60 are in the range from 0.25 to 5 min.
EP92107005A 1991-06-09 1992-04-24 Sèche-cheveux Expired - Lifetime EP0518035B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4119020 1991-06-09
DE4119020A DE4119020A1 (de) 1991-06-09 1991-06-09 Haartrockner

Publications (3)

Publication Number Publication Date
EP0518035A2 true EP0518035A2 (fr) 1992-12-16
EP0518035A3 EP0518035A3 (fr) 1993-01-07
EP0518035B1 EP0518035B1 (fr) 1996-01-17

Family

ID=6433590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92107005A Expired - Lifetime EP0518035B1 (fr) 1991-06-09 1992-04-24 Sèche-cheveux

Country Status (4)

Country Link
US (1) US5448677A (fr)
EP (1) EP0518035B1 (fr)
AT (1) ATE133042T1 (fr)
DE (2) DE4119020A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631738A1 (fr) * 1993-06-17 1995-01-04 ERMILA FRISEURGERÄTE GmbH Sèche-cheveux
WO1995031915A1 (fr) * 1994-05-20 1995-11-30 Pifco Limited Seche-cheveux
DE19635933A1 (de) * 1996-09-05 1998-03-12 Braun Ag Filtereinrichtung
US7681407B2 (en) 2002-07-08 2010-03-23 Danfoss A/S Method and a device for detecting flash gas
US8100167B2 (en) 2002-10-15 2012-01-24 Danfoss A/S Method and a device for detecting an abnormality of a heat exchanger, and the use of such a device
WO2017068320A1 (fr) * 2015-10-21 2017-04-27 Dyson Technology Limited Appareil de soins des cheveux
US9986810B2 (en) 2015-10-21 2018-06-05 Dyson Technology Limited Hand held appliance
US10021951B2 (en) 2015-10-21 2018-07-17 Dyson Technology Limited Hand held appliance

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6694108B2 (en) * 1998-10-30 2004-02-17 Canon Kabushiki Kaisha System for managing temperature in an image forming apparatus by controlling printing speed
USD425665S (en) * 1998-12-29 2000-05-23 Braun Gmbh Hair dryer
US6412435B1 (en) * 2000-09-11 2002-07-02 Ronald G. Timmons, Jr. Dirty filter indicator
DE10217975B4 (de) 2002-04-22 2004-08-19 Danfoss A/S Verfahren zum Entdecken von Änderungen in einem ersten Medienstrom eines Wärme- oder Kältetransportmediums in einer Kälteanlage
DE10217974B4 (de) 2002-04-22 2004-09-16 Danfoss A/S Verfahren zum Auswerten einer nicht gemessenen Betriebsgröße in einer Kälteanlage
US20040093756A1 (en) * 2002-11-14 2004-05-20 Conair Cip, Inc. Filter device for a hair dryer
BR0303784A (pt) * 2003-09-04 2004-12-14 Daihatsu Ind E Com De Moveis E Secador de cabelos aperfeiçoado
DE202004011651U1 (de) * 2004-07-24 2005-12-29 Wik Far East Ltd. An Netzspannung anschließbares Haarpflegegerät
JP2006150060A (ja) * 2004-11-30 2006-06-15 Kica Inc ヘアドライヤー
US20070119069A1 (en) * 2005-11-30 2007-05-31 Youngtack Shim Electromagnetically-shielded hair drying systems and methods
ES2315072B1 (es) * 2006-01-18 2010-01-29 Duna Enterprises S.L. Secador de pelo de tipo manual programable con funciones multiples.
US7222591B1 (en) 2006-03-13 2007-05-29 Rheem Manufacturing Company Ducted secondary air fuel-fired water heater LDO detection
US7876917B2 (en) * 2006-08-28 2011-01-25 Youngtack Shim Generic electromagnetically-countered systems and methods
US20110095935A1 (en) * 2006-08-28 2011-04-28 Youngtack Shim Electromagnetically-countered systems and methods by maxwell equations
US9112395B2 (en) 2006-08-28 2015-08-18 Youngtack Shim Electromagnetically-countered actuator systems and methods
US8625306B2 (en) 2006-08-28 2014-01-07 Youngtack Shim Electromagnetically-countered display systems and methods
ITMI20062147A1 (it) * 2006-11-09 2008-05-10 Elchim Spa Asciugacapelli dotato di un dispositivo di sicurezza
GB2487996B (en) 2011-08-19 2013-07-10 Jemella Ltd Hair dryer
JP2013123525A (ja) * 2011-12-14 2013-06-24 Panasonic Corp 送風装置
US10485320B2 (en) * 2016-08-19 2019-11-26 Shih-Ling Hsu Hair dryer

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FR2226947A1 (fr) * 1973-04-26 1974-11-22 Indola Electric Bv
US4085309A (en) * 1975-06-04 1978-04-18 Sperry Rand Corporation Control circuit arrangement for a portable electrically heated hair treatment appliance
GB2007877A (en) * 1977-11-19 1979-05-23 Braun Ag Electric hairdrier
GB2083745A (en) * 1980-09-18 1982-03-31 Bristol Myers Co Controlled temperature hair dryer
JPS61150016A (ja) * 1984-12-25 1986-07-08 Toshiba Corp 換気扇運転制御装置
JPS63715A (ja) * 1986-06-20 1988-01-05 Matsushita Electric Works Ltd 温風器の温度制御装置
JPS63716A (ja) * 1986-06-20 1988-01-05 Matsushita Electric Works Ltd 温風器の温度制御装置

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US2625239A (en) * 1948-05-15 1953-01-13 Edgar P Senne Vacuum cleaner mechanism responsive to thermal effects of filter bag filling
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FR2242947B1 (fr) * 1973-09-11 1978-07-13 Sfem
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JPS5971785A (ja) * 1982-10-15 1984-04-23 松下電器産業株式会社 衣類乾燥機の目づまり報知装置
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GB2176292B (en) * 1985-06-11 1989-07-26 Potterton Int Ltd Air-flow measuring device and method
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DE3724343A1 (de) * 1987-07-23 1989-02-02 Licentia Gmbh Anzeige fuer unzulaessige betriebszustaende, insbesondere bei haushaltgeraeten
JPH01317518A (ja) * 1988-06-17 1989-12-22 Matsushita Electric Ind Co Ltd 空気清浄装置
JPH02305599A (ja) * 1989-05-19 1990-12-19 Sanyo Electric Co Ltd 衣類乾燥機
US5111692A (en) * 1990-03-27 1992-05-12 Fluid Components, Inc. Temperature compensated liquid level and fluid flow sensor

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Publication number Priority date Publication date Assignee Title
FR2226947A1 (fr) * 1973-04-26 1974-11-22 Indola Electric Bv
US4085309A (en) * 1975-06-04 1978-04-18 Sperry Rand Corporation Control circuit arrangement for a portable electrically heated hair treatment appliance
GB2007877A (en) * 1977-11-19 1979-05-23 Braun Ag Electric hairdrier
GB2083745A (en) * 1980-09-18 1982-03-31 Bristol Myers Co Controlled temperature hair dryer
JPS61150016A (ja) * 1984-12-25 1986-07-08 Toshiba Corp 換気扇運転制御装置
JPS63715A (ja) * 1986-06-20 1988-01-05 Matsushita Electric Works Ltd 温風器の温度制御装置
JPS63716A (ja) * 1986-06-20 1988-01-05 Matsushita Electric Works Ltd 温風器の温度制御装置

Non-Patent Citations (3)

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Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 351 (P-520)1986 & JP-A-61150016 (TAJIMA TOSHIICHI ). Zusammenfassung. *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 194 (P-713)1988 & JP - A - 63000716 ( MATSUSHITA ELECTRIC WORKS ). Zusammenfassung. *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 194 (P-713)1988 & JP-A-63000715 ( MATSUSHITA ELECTRIC WORKS ). Zusammenfassung . *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631738A1 (fr) * 1993-06-17 1995-01-04 ERMILA FRISEURGERÄTE GmbH Sèche-cheveux
WO1995031915A1 (fr) * 1994-05-20 1995-11-30 Pifco Limited Seche-cheveux
DE19635933A1 (de) * 1996-09-05 1998-03-12 Braun Ag Filtereinrichtung
US7681407B2 (en) 2002-07-08 2010-03-23 Danfoss A/S Method and a device for detecting flash gas
US8100167B2 (en) 2002-10-15 2012-01-24 Danfoss A/S Method and a device for detecting an abnormality of a heat exchanger, and the use of such a device
WO2017068320A1 (fr) * 2015-10-21 2017-04-27 Dyson Technology Limited Appareil de soins des cheveux
US9986810B2 (en) 2015-10-21 2018-06-05 Dyson Technology Limited Hand held appliance
US10021951B2 (en) 2015-10-21 2018-07-17 Dyson Technology Limited Hand held appliance
US10085538B2 (en) 2015-10-21 2018-10-02 Dyson Technology Limited Hand held appliance
RU2687682C1 (ru) * 2015-10-21 2019-05-15 Дайсон Текнолоджи Лимитед Устройство для ухода за волосами

Also Published As

Publication number Publication date
DE59205069D1 (de) 1996-02-29
US5448677A (en) 1995-09-05
EP0518035B1 (fr) 1996-01-17
ATE133042T1 (de) 1996-02-15
DE4119020A1 (de) 1992-12-10
EP0518035A3 (fr) 1993-01-07

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