EP1797787A2 - Sèche-cheveux incluant un dispositif de sécurité - Google Patents

Sèche-cheveux incluant un dispositif de sécurité Download PDF

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Publication number
EP1797787A2
EP1797787A2 EP06025794A EP06025794A EP1797787A2 EP 1797787 A2 EP1797787 A2 EP 1797787A2 EP 06025794 A EP06025794 A EP 06025794A EP 06025794 A EP06025794 A EP 06025794A EP 1797787 A2 EP1797787 A2 EP 1797787A2
Authority
EP
European Patent Office
Prior art keywords
hairdryer
filter
electronic circuit
card
phototransistor
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Withdrawn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
EP06025794A
Other languages
German (de)
English (en)
Other versions
EP1797787A3 (fr
Inventor
Fabio ELCHIM S.P.A. Repossi
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.)
ELCHIM SpA
Original Assignee
ELCHIM SpA
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 ELCHIM SpA filed Critical ELCHIM SpA
Publication of EP1797787A2 publication Critical patent/EP1797787A2/fr
Publication of EP1797787A3 publication Critical patent/EP1797787A3/fr
Withdrawn legal-status Critical Current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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/30—Electric circuitry specially adapted for hair drying devices
    • 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
    • A45D20/42—Additional devices or measures, e.g. for noise damping, for musical entertainment

Definitions

  • the present invention relates to a hairdryer including a safety device.
  • the air inlet filter of a hairdryer must be always held in a perfectly cleaned condition to provide a maximum efficiency of the apparatus and to prevent failures and overheating from occurring.
  • the hairdryer heating resistance cannot be properly cooled, thereby the thermostatic switch of the hairdryer is compelled to continuously operate while providing alternately excessively cold or hot air.
  • the apparatus does not properly operate and it is susceptible to failures and safety problems.
  • the aim of the present invention is to provide a hairdryer including a safety device designed for overcoming the above disclosed drawbacks.
  • a main object of the invention is to provide such a hairdryer including a detecting device designed for safely detecting a possible jamming of the hairdryer filter.
  • Another object of the present invention is to provide such a hairdryer including a safety device designed for switching off the operation of the hairdryer or designed for providing a failure signal, as the filter is jammed or clogged beyond a safety threshold set by the hairdryer maker, to allow the operator to timely clean the filter.
  • Yet another object of the invention is to provide such a safety device for hairdryers which has a very small size, to be easily housed in the hairdryer and which allows the hairdryer to always properly operate, and this by using constructional materials and technique as commercially available.
  • a hairdryer including a safety device, characterized in that said safety device is adapted to detect a clogging or jamming, even partial, of the air inlet filter applied at the air inlet opening of the hairdryer.
  • the hairdryer according to the invention which has been generally indicated by the reference number 1, comprises a box-like body, including a rear shell 2 and a front shell 7 and designed for holding therein an operating motor and heating means comprising a heating resistance or the like, in a per se known manner.
  • the rear shell 2 comprises an opening or port, to which a screen or mesh filter 5 adapted to be locked by a filter ring nut 3, is applied.
  • said filter 5 is adapted to operate as a dirt barrier for preventing dirt present in environment air from entering the hairdryer.
  • the hairdryer further comprises a safety device for detecting a jamming or clogging, even partial, of the filter 5.
  • the safety device comprises a photosensor 4, for sensing the light intensity through the filter 5.
  • the senor 4 will send a signal which, through a suitably designed electronic circuit 6 will operate a light indicating element 11, or other signaling means, which will be switched on with an intermittent or continuous light.
  • Said electronic circuit 6 can also be used for other applications, such as, for example, a moisture sensor.
  • the light indicating element 11 may be arranged between the rear shell 2 and the filter ring nut 3, as shown in figure 1, or between the two front and rear shells, as shown in figure 3, or in any other suitable positions.
  • the light photosensor 4 can be arranged at the center of the filter ring nut 3, and being spaced, therein inside, from the mesh or screen filter 5.
  • the electronic circuit 6 can be arranged in the hairdryer handle 12 or any other region inside the hairdryer body.
  • Said safety device can comprise an automatic switch for switching off the fan motor and heating resistance, as said sensor detects that the filter is clogged beyond a preset threshold level.
  • the safety device further comprises an environment light detector, to allow said safety device to also operate as the environment light changes.
  • the environment light detector comprising a resistor and generally indicated by the reference number 13, can be arranged on the hairdryer body, for example at the air inlet thereof.
  • Said electronic circuit substantially comprises an electronic card, shown in figure 4, including a single surface printed board thereon are assembled the operating components and, on the outside thereof being moreover provided a phototransistor, a photoresistor, and a power supply assembly.
  • the safety device operates as follows.
  • the electronic card is arranged inside the body of the hairdryer.
  • the phototransistor as suitably arranged, will read the light amount passing through the mechanical filter of the hairdryer.
  • the photoresistor arranged at a different position from that of the phototransistor, will read the environment light amount.
  • the light amount read out by the phototransistor will define the condition of clean filter or dirty or clogged filter and, more precisely, based on a value x.
  • the light amount read out by the photoresistor will set the environment light amount and, depending on this value, a feed back to the value read out by the phototransistor will be performed, by proportionately translating the dirty filter values.
  • the card further includes herein a LED diode of a red color.
  • This diode will be held in a switched off condition if the filter is in a cleaned condition.
  • the card will be power supplied simultaneously with the fan motor, while controlling the light amount on the phototransistor and on the photoresistor, the operation of the card being that which has been above disclosed up to its switching off.
  • the photodetectors are read out after about a second from the power up of the card, since the signals must be stabilized, and the other subsequent read-outs will be repeatedly performed at even intervals up to the switching off of said card.
  • a dirty filter signal will be considered as valid only after some consecutive seconds with the same result; the same thing occurs for the clean filter signal.
  • the red LED will be switched on and switched off again, if a new cleaned filter condition is detected, with the above disclosed procedure or exclusively as the card is switched off.
  • the electronic circuit is preferably made as hereinafter disclosed, with reference to figure 4.
  • All the components connected downstream of the power supply operate under a low voltage.
  • the reference number 21 shows a resistor Ri designed for providing a potential difference at the ends thereof, to provide a low voltage due to a resistive loss.
  • This component and its rated power also operate to eliminate the surge type noises which could arrive from the power supply net and provide failures to the electronic card.
  • the reference number 22 indicates the components PD1, DZ1 and C1, downstream of the resistor Ri.
  • PD1 is a diode bridge operated to modify the voltage waveshape from an alternating one with a positive half wave and a negative half wave inside a fiftieth second to two positive half waves in a fiftieth 50° of second.
  • DZ1 is a zener diode operating to stabilize the voltage at a value of 5.1V.
  • An electrolytic capacitor for filtering the voltage and transform it from an impulsive or pulse voltage to a DC voltage is moreover provided.
  • a resistor 23 operates to quickly discharge the energy stored by the capacitor C1.
  • this operation will allow the microprocessor reset circuit to operate in a proper time and manner, while allowing a proper restarting and performing of the program instructions, as the power supply voltage is reset.
  • the reference number 24 shows a filter ceramic capacitor, arranged near the microprocessor power supply pins.
  • the ceramic capacitor 24 operates to provide a higher immunity to the burst type of noises.
  • the reference number 25 shows a circuit branch designed for reading out, through the microprocessor analogic digital input, the signal sent by the phototransistor FT1.
  • the level of this signal will be changed based on the light amount impinging on the phototransistor, so as to increase or decrease its conductivity toward the ground.
  • the fixed reference at + 5 is obtained through the resistor R4.
  • variable reference is just provided by the phototransistor.
  • the reference number 26 shows a circuit branch operating to read out, through the microprocessor analogic digital input, the signal sent by the photoresistor FR1.
  • the level of this signal will be changed depending on the light amount impinging on the photoresistor, to increase or decrease the resistive value thereof toward the ground.
  • the fixed reference at + 5 is obtained through the resistor R6.
  • variable reference is just given by the photoresistor.
  • the microprocessor through an output pin thereof, will enable the switching on or off of the red color LED diode DL1.
  • the current is limited by the series resistor R3.
  • the LED DL1 and the resistor R3 have been generally indicated by the reference number 27.
  • the component 28 is a flash type of microprocessor, the core of the system, with its on board software operating said electronic card.
  • the microprocessor operates at 4Mhz and comprises an inner oscillator and brown-out.
  • the invention provides a hairdryer including a safety device adapted to generate a signal signaling to the user that the filter is excessively clogged, for allowing the hairdryer to properly and safely operate.
  • An advantage of the present invention is that the safety limits are specifically preset by the maker, in designing the hairdryer, for providing a timely cleaning operation.
  • the used materials, as well as the contingent size and shapes can be any, depending on requirements and the status of the art.
EP06025794A 2005-12-13 2006-12-13 Sèche-cheveux incluant un dispositif de sécurité Withdrawn EP1797787A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20052379 ITMI20052379A1 (it) 2005-12-13 2005-12-13 Asciugacapelli dotato di un dispositivo di sicurezza

Publications (2)

Publication Number Publication Date
EP1797787A2 true EP1797787A2 (fr) 2007-06-20
EP1797787A3 EP1797787A3 (fr) 2009-03-25

Family

ID=37908303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06025794A Withdrawn EP1797787A3 (fr) 2005-12-13 2006-12-13 Sèche-cheveux incluant un dispositif de sécurité

Country Status (2)

Country Link
EP (1) EP1797787A3 (fr)
IT (1) ITMI20052379A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108523371A (zh) * 2017-03-01 2018-09-14 松下知识产权经营株式会社 加热送风装置
CN116194012A (zh) * 2020-07-31 2023-05-30 力高专利股份公司 装备有电动机的吹风机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6742285B2 (ja) * 2017-09-14 2020-08-19 シャープ株式会社 ヘアドライヤ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995031915A1 (fr) * 1994-05-20 1995-11-30 Pifco Limited Seche-cheveux
FR2739919A1 (fr) * 1995-10-16 1997-04-18 Froidevaux Jean Marie Dispositif de sechage, notamment seche-cheveux
US20050204577A1 (en) * 2004-03-18 2005-09-22 Daniel Santhouse Hairdryer with electrostatic precipitator and filter cleanout warning
GB2433886A (en) * 2006-01-07 2007-07-11 Duna Entpr Sa A programmable hair dryer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995031915A1 (fr) * 1994-05-20 1995-11-30 Pifco Limited Seche-cheveux
FR2739919A1 (fr) * 1995-10-16 1997-04-18 Froidevaux Jean Marie Dispositif de sechage, notamment seche-cheveux
US20050204577A1 (en) * 2004-03-18 2005-09-22 Daniel Santhouse Hairdryer with electrostatic precipitator and filter cleanout warning
GB2433886A (en) * 2006-01-07 2007-07-11 Duna Entpr Sa A programmable hair dryer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108523371A (zh) * 2017-03-01 2018-09-14 松下知识产权经营株式会社 加热送风装置
CN116194012A (zh) * 2020-07-31 2023-05-30 力高专利股份公司 装备有电动机的吹风机

Also Published As

Publication number Publication date
ITMI20052379A1 (it) 2007-06-14
EP1797787A3 (fr) 2009-03-25

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