WO2015043094A1 - Fer à coiffer - Google Patents

Fer à coiffer Download PDF

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Publication number
WO2015043094A1
WO2015043094A1 PCT/CN2013/089988 CN2013089988W WO2015043094A1 WO 2015043094 A1 WO2015043094 A1 WO 2015043094A1 CN 2013089988 W CN2013089988 W CN 2013089988W WO 2015043094 A1 WO2015043094 A1 WO 2015043094A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
decrease
rate
heating element
jaws
Prior art date
Application number
PCT/CN2013/089988
Other languages
English (en)
Inventor
Wai Ho Michael Keong
Original Assignee
Kenford Industrial Company Ltd.
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 Kenford Industrial Company Ltd. filed Critical Kenford Industrial Company Ltd.
Priority to EP13894780.9A priority Critical patent/EP3051974B1/fr
Priority to CN201380081147.1A priority patent/CN105764376B/zh
Priority to US15/025,929 priority patent/US20160213117A1/en
Publication of WO2015043094A1 publication Critical patent/WO2015043094A1/fr

Links

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
    • A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
    • A45D1/28—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for controlling or indicating the temperature
    • 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
    • A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
    • A45D1/02—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for internal heating, e.g. by liquid fuel
    • A45D1/04—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for internal heating, e.g. by liquid fuel by electricity
    • 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
    • A45D2/00—Hair-curling or hair-waving appliances ; Appliances for hair dressing treatment not otherwise provided for
    • A45D2/001—Hair straightening appliances

Definitions

  • the present invention relates to electric irons for thermal shaping and styling of hair, and particularly to the temperature regulation of hair styling irons.
  • Hair irons used for curling or straightening of hair employ heating elements which are typically plate or barrel-shaped with outer surfaces which contact the hair.
  • the heating elements have relatively low thermal mass, making the irons convenient to use, because they may reach operating temperature within fractions of a minute.
  • the elements are thermostatically controlled, whereby hair held against the heating element applies a thermal load that tends to reduce the temperature of the heating element, in response to which a thermostat increases power to attempt to restore the setpoint temperature.
  • a drawback with hair styling irons employing such conventional temperature regulation techniques is a power consumption penalty which, particularly in the case of battery powered hair irons, has significant performance impacts.
  • the temperature should be set at the highest level that avoids heat damage to the hair.
  • this is not a simple matter as the amount of heat transferred when excessive processing times are used can also result in heat damage.
  • a number of other variables beyond the time-temperature profile also affect the potential for heat damage - things such as the intrinsic properties of an individual's hair, treatments agents applied to the hair (such as water or other softening agents), as well as the manner in which the hair iron is used (the size of a tress which is treated, the tension applied to the hair etc). As a result, it is difficult for the user to select the correct temperature for any specific operation that mitigates the possibility of heat damage.
  • the patent publication US20120005550 describes a method of temperature regulation in a hair straightening iron, in which two temperature sensors are provided for sensing the temperature of the hair.
  • the two sensors are mounted to the heating element on opposing sides such that, as the appliance is drawn along the hair, one sensor measures the temperature of the hair about to be treated, while the other measures the temperature of the hair that has just been treated.
  • the patent publication US201 10253164 also describes a method of temperature regulation in a hair straightening iron, having two jaws for gripping the hair.
  • a sensor detects closure of the jaws and increases the setpoint temperature for the heating elements.
  • this method does not address the questions of power saving or the avoidance of heat damage.
  • a hair styling appliance comprising: at least one heating element having a heating surface for contact with the hair; a pair of jaws, the heating element being disposed on one of the jaws, the jaws being connected for movement between an open position for inserting or removing hair between the jaws, and a closed position in which the other of the jaws presses the hair against the heating surface; a temperature sensor that senses the temperature of the heating element proximate the heating surface; an activation sensor that senses when the jaws are in the closed position and generates an first activation output; a power control circuit that responds to the activation sensor and the temperature sensor, and is operative to operate the heating element at a steady state power level to maintain the temperature in a steady state; the power control circuit including means for determining a time rate of decrease of the temperature of the heating element, and means for monitoring the temperature and the time rate of decrease of the temperature to detect an abnormal thermal load on the heating element; the power control circuit being operative in response to the first activation output to
  • the steady state power level is a power level that results in a steady state element temperature, or an equivalent thereof. For instance, either a constant power level or, if a steady state element temperature is attained by a power level that oscillates instantaneously, then the time-average of this oscillating power level may be considered a steady state power level.
  • the power level lower than the steady state power level may be a zero power level.
  • the appliance may further include an input device for enabling the user to select one of a plurality of power settings for the heating element, the control circuit being operatively connected to the input device and operative to operate the heating element at a steady state power level corresponding to the user selected power setting and, in response to detection of an abnormal thermal load, to operate the heating element at a power level lower than the steady state power level associated with the user selected power setting.
  • the means for monitoring the temperature and the time rate of decrease of the temperature to detect an abnormal thermal load comprises means for comparing the measured time rate of decrease of the temperature to a predetermined rate of decrease representing an abnormal thermal load, the monitoring means detecting an abnormal thermal load when the measured time rate of decrease is lower than the predetermined rate of decrease.
  • the means for monitoring the temperature and the time rate of decrease of the temperature comprises means for comparing the sensed temperature to a predetermined threshold temperature, the monitoring means only detecting an abnormal thermal load when the sensed temperature exceeds the predetermined threshold temperature.
  • the means for monitoring the temperature and the time rate of decrease of the temperature to detect an abnormal thermal load comprises means for comparing the sensed temperature to a first calculated temperature, a second calculated temperature lower than the first calculated temperature, and a third calculated temperature lower than the second calculated temperature and means for comparing the measured rate of decrease of temperature to a first predetermined rate of decrease, a second predetermined rate of decrease less than the first rate of decrease and a third predetermined rate of decrease less than the second rate of decrease, the monitoring means detecting an abnormal thermal load when the sensed temperature is greater than the first calculated temperature and the measured rate of decrease is less than the first reference rate of decrease or when the sensed temperature is less than the second calculated temperature and the measured rate of decrease is less than the second reference rate of decrease or when the sensed temperature is less than the third calculated temperature and the measured rate of decrease is less than the third reference rate.
  • the power control circuit may be operative to reduce the power level applied to the heating element by the same amount when the sensed temperature is greater than the first reference temperature and the measured rate of decrease is less than the first reference rate of decrease or when the sensed temperature exceeds the second reference temperature and the measured rate of decrease is less than the second reference rate of decrease or when the sensed temperature exceeds the third reference temperature and the measured rate of decrease is less than the third reference rate.
  • the power control circuit may be operative to reduce the power level applied to the heating element by a first amount when the sensed temperature exceeds the first reference and the measured rate of decrease is less than the first reference rate of decrease or when the sensed temperature exceeds the second reference and the measured rate of decrease is less than the second reference rate, or when the sensed temperature exceeds the third reference rate and the measured rate of decrease is less than the third reference rate of decrease, and to reduce the power level by a second amount greater than the first amount when the sensed temperature exceeds the second reference temperature and the measured rate is less than the first reference rate or when the measured temperature exceeds the third reference temperature and the measured rate is less than the second reference rate and to reduce the power level applied to the heating element by a third amount greater than the second amount when the sensed temperature exceeds the third reference temperature and the measured rate is less than the first reference rate.
  • the means for measuring the temperature rate of decrease comprises timing means for establishing the time interval between successive rate of decrease measurements; the timing means establishing first, second and third time intervals measured from the time of the first activation output, the measured rate of decrease occurring at the end of the first, second and third time intervals being compared with the first, second and third predetermined rates of decrease respectively.
  • the power control circuit stores a reference temperature corresponding to the steady state power output, and the first, second and third calculated temperatures are calculated by subtracting predefined first, second and third reference values from the reference temperature to define the first, second and third predetermined rates of decrease.
  • control circuit operates the heating element in a thermostatic mode at first power levels that vary as a function of a temperature offset to maintain a setpoint temperature, the temperature offset comprising the difference between the instantaneous element temperature and the setpoint temperature and wherein the control circuit comprises means for comparing the rate of decrease to a reference rate of decrease, and when the measured rate of decrease is greater than the reference rate of decrease, the control circuit operates the heating element in a boost mode at power levels higher that the first power levels at all temperature offsets until there is detected a measured rate of decrease of heating element temperature less than the reference rate or a heating element temperature at a setpoint temperature corresponding to the steady state power output.
  • the activation sensor generates a second activation output when the jaws are in the open position and the power control circuit is further operative in the presence of the second activation output and following the operation of the heating element at the power level lower than the steady state power level to operate the heating element in the boost mode until the applied power level again equals the steady state power level or until detection of an abnormal thermal load recurs.
  • the invention provides a method of controlling power in a hair styling appliance of the type having a heating element and a temperature sensor that senses the temperature of the heating element proximate a heating element surface, a pair of jaws, the heating element being disposed on one of the jaws, the jaws being connected for movement between an open position for inserting or removing hair between the jaws, and a closed position in which the other of the jaws presses the hair against the heating element, and an activation sensor that senses when the jaws are in the closed position and generates an first activation output; the power control method comprising the steps of: operating the heating element at a steady state power level; when the first activation output is generated, periodically measuring the temperature and computing a time rate of decrease of the temperature and comparing the computed rate to a predetermined rate, and when the measured rate of decrease of the temperature is less than the predetermined rate, reducing the power level applied to the heating element to protect against hair damage by overheating.
  • This invention provides a hair styling iron which is effective and efficient in operational use, and which has an overall simple design which minimizes manufacturing costs. Responding according to the measured rate of change of temperature, power savings are achieved by lowering power to the elements when abnormally low thermal loads are detected, and by avoiding excessive temperatures in this same way the possibility of heat damage to the hair is mitigated.
  • Figure 1 is a schematic sectional illustration of a hair iron according to an embodiment of the invention.
  • Figure 2 is a functional block diagram of the electrical circuitry for the hair iron of Fig. 1
  • Figures 3, 4a, 4b and 5 are graphic representations of the temperature and electrical current vs. time characteristics for the heating elements of the hair iron of Fig. 1 , and temperature vs. time for hair being heated by the same.
  • Fig. 1 illustrates a first embodiment of a hand-held electric hair iron having first and second elongate jaws 10, 1 1 which may be joined at their proximal ends.
  • Both jaws 10, 1 1 may be of hollow moulded polymeric construction, and include respective elongate heating elements 13, 14 on their distal ends.
  • the heating elements 13, 14 are assemblies that include outer members 16, 17 made of metal, such as chromium steel.
  • Respective heating surfaces 16a, 17a of the outer members 16, 17 are complementary, generally planar inner surfaces that may be polished. The surfaces 16a, 17a oppose one another and are configured to be held in contact with the hair.
  • the outer members 16, 17 are heated by respective internal resistive elements 15a, 15b arranged in a flat configuration and disposed directly inside the outer members 16, 17.
  • Power may be provided to the heating elements 13, 14 from a power control circuit 20 via a power supply 18 such as an electrical cord connected to mains power.
  • the jaws 10, 1 1 may be connected by a hinge 12, or any like mechanism, whereby the jaws 10, 1 1 are connected for movement between an open position (see Fig. 1 ) for inserting or removing hair between the jaws, and a closed position (not shown) in which the other of the jaws 10, 1 1 grip the hair, pressing it between the heating surfaces 16, 17.
  • the temperature sensor 21 senses the temperature of the heating element assembly 14 proximate the heating surface 17a and may be a may be a thermistor or thermocouple, for example.
  • the activation sensor 22 senses when the jaws 10, 1 1 are in the closed position, as by mechanical, optical or magnetic means and generates an first activation output that is transmitted to the power control circuit 20, and correspondingly provideds a second activation output when the jaws are closed.
  • an input device 25 such as a push-button switch for enabling the user to select one of a plurality of discrete power settings for the heating elements 13, 14 and a display 26 to show the power setting selected by the user.
  • the power control circuit 20 drives power through the heating elements 13, 14 based on feedback from the temperature sensor 21 , as by switching on and off the current supplied to the heating elements 13, 14.
  • Each of the power settings has uniquely associated with it a particular steady state power level, allowing a particular temperature setpoint or setpoint range to be maintained when not in use.
  • the main heat transfer mechanism in the hair iron is by conduction from the heating elements 13, 14 to the hair.
  • the temperature of the heating elements 13, 14 will usually remain within acceptable limits without need for any corrective action.
  • abnormally low thermal loads likely to cause excessive heating can be caused, for instance, by treating a reduced amount of hair, or increasing the time which heat is applied to any section of the hair.
  • an object of the present invention is to protect against hair damage from overheating without adversely affecting styling performance.
  • the power control circuit uses heating element temperature information to anticipate the occurrence of an over- temperature condition by detecting the presence of an abnormally low load and adjusting the power level applied to the heating element before the temperature exceeds acceptable limits. By anticipating the condition before it actually exists, power level adjustments can be made gradually, having less affect on styling performance.
  • the rate of decrease of the temperature of the heating elements 13, 14 may be lower than the predetermined rate characteristic of an abnormally low thermal load, so this case needs to be distinguished from the case where this low rate of decrease occurs during operation. This is achieved, using an activation sensor that senses when the jaws 10, 1 1 are in the closed position and generates the first activation output. Once the first activation output has been received, the power control circuit 20 may begin monitoring the rate of decrease of temperature.
  • a series of tests were conducted using the hair styling appliance of the illustrative embodiment with different heating loads to generate temperature vs. time curves characterising the various different loads.
  • the tests were conducted over a range of starting steady stare temperatures from 120 to 250 ' ⁇ , using loads provided by hair emulators in the form of conductive metal (Aluminium) strips. Depending upon the gauge of the strip used, the strips copy or emulate the temperature versus time characteristics of bulk lengths of dry hair.
  • a 4 gramme and 2 gramme hair emulator were used, to emulate 4 gramme and 2 gramme lengths of hair of 200mm length.
  • a typical operating cycle was considered, whereby at a selected steady state power level a steady state temperature was first obtained, before closing the jaws on the emulator and drawing the appliance from one end of the emulator to the other in five seconds, and then releasing the hair.
  • a drop of ⁇ ⁇ ' ⁇ in the first elapsed second, or a drop of 19 ⁇ after the second second, or a drop of 27 ⁇ ⁇ by the third elapsed second were found satisfactory, while rates of decrease less than these figures showed the potential to result in overheating.
  • the reference temperatures are selected with a view to allowing for corrections early enough to prevent overheating with the least possible reduction in power level but late enough to avoid unnecessary adjustments.
  • the values for the reference rates and reference temperatures have been empirically determined to provide good results with the appliance of the illustrative embodiment, but it is to be understood that they are intended to illustrate but not limit the invention.
  • Figs. 3, 4a, 4b and 5 illustrate the variations with time in the temperature of the heating elements 13, 14 (uppermost), the temperature of the different hairemulators (intermediate), and the current supplied to the heating elements 13, 14 (lowermost).
  • the current supplied to the heating elements 13, 14 is directly proportional to the power, since the voltage is constant, so controlling the current controls the power level.
  • the steady state temperature is maintained when the iron is not in use by a steady state power or current level. While the instantaneous current supplied to the elements may actually vary to maintain the elements at a steady state temperature, the time averaged current or power level is constant for a given steady state temperature.
  • the heating elements 13, 14 Prior to operation, the heating elements 13, 14 are held at the 200 ⁇ setpoint by the power control circuit 20 at a steady state power output at which about 1 ampere flows through the elements 13, 14 and the hair emulator is at room temperature.
  • the heating elements 13, 14 attain this temperature with the power control circuit 20 operating in a thermostatic control mode.
  • the control circuit operates at thermostatic power levels that vary as a function of the temperature offset or difference between the instantaneous element temperature and the setpoint temperature i.e. the greater the temperature offset higher the power level.
  • the thermostatic power level for a given temperature offset may be determined, for instance, by a lookup table, or by a calculation performed by the power control circuit 20.
  • Fig. 3 illustrates operation under a normal heat load, comprising a 4 gramme hair emulator.
  • the power control circuit 20 receives the first activation output, starting a timer and recording the starting temperature.
  • the power control circuit 20 reads the instantaneous heating element temperature and evaluates the first rate of decrease by subtracting the current temperature from the starting temperature and dividing the result by the elapsed time. This first rate of decrease is then compared against the predetermined l O Osec rate of decrease, which is stored in memory in the circuit.
  • the power control circuit 20 responds to increase the current to the heating elements 13, 14 according to the thermostatic power level determined by the power control circuit 20 in proportion to the difference between the instantaneous temperature and the starting temperature.
  • the rates of decrease are calculated, measuring over 2 and 3 seconds respectively, and in both cases the calculated rates are equal or more than 9 X ⁇ /sec and SX ⁇ /sec respectively.
  • Fig. 3 shows that the maximum temperature of the hair occurs immediately before the jaws are opened to release the hair, when the jaws are closed the second activation output from the activation sensor 22 signals the power control circuit 20 to stop monitoring the rate of change of temperature while, of course, still seeking to maintain the steady state temperature according to the setting of the input device 25.
  • Figs. 4a and 4b show the same features as Fig. 3, but for a 2 gramme emulator, representing half the amount of hair which is normally styled, compared to Fig. 3, and thus an abnormally low thermal load.
  • the power control circuit 20 determines that the rate of decrease is less than l O Osec. Accordingly, there is a risk of overheating if the power input to the heating elements 13, 14 remains at the steady state level.
  • the power control circuit 20 thus detects an abnormally low thermal load and responds, by operating the heating elements 13, 14 in a reduced mode at a power level lower than the steady state power level, specifically at a zero power level i.e. power supply to the elements is cut by the power control circuit 20.
  • the rates of decrease are calculated, and in both cases the calculated rates are less than 9 X ⁇ /sec and SX ⁇ /sec respectively, so the power control circuit 20 maintains the heating elements 13, 14 at the power level lower than the steady state power level.
  • Fig. 4a shows the power control circuit 20 operating in the thermostatic power control mode and increasing the power according to the temperature offset or the difference between the instantaneous heating element temperature (approx. 164 ⁇ ⁇ ) and the setpoint temperature (200 ' ⁇ ) according to the thermostatic no-load schema. However, as shown in Fig. 4a, it takes 3 or 4 seconds for the setpoint temperature to be attained, after use and the opening of the jaws.
  • Fig. 4a shows the power control circuit 20 operating in the thermostatic power control mode and increasing the power according to the temperature offset or the difference between the instantaneous heating element temperature (approx. 164 ⁇ ⁇ ) and the setpoint temperature (200 ' ⁇ ) according to the thermostatic no-load schema. However, as shown in Fig. 4a, it
  • FIG. 4b illustrates a boosted control mode that boosts the element temperature more quickly than in the thermostatic mode.
  • This boost mode may be selected by the power control circuit 20 following the operation at the power level lower than the steady state power level in order to recover more quickly.
  • This predefined boost schema is followed after the second activation output indicates that the jaws are closed when operating at the power level lower than the steady state power level.
  • the power control circuit 20 operates to provide power to the elements at a higher level than for the thermostatic mode.
  • the element power peaks at a higher value than with the thermostatic mode and, for instance, the power peak may correspond to 3 amperes, compared to 2 amperes in the conventional thermostatic mode. As shown, the result is that the element temperature is more quickly restored to the setpoint level - within about two seconds according to Fig. 4b.
  • the power control circuit 20 operates in the thermostatic mode for normal loads, during which operation the time rate of decrease of the element temperature (Tr) is monitored, and provided Tr is within the range of rates corresponding to the time from the first activation output between the (lower) predetermined rate of decrease and the (upper) reference rate of decrease, then no changes are made to the conventional thermostatic control schema.
  • Tr is below and above these ranges within the respective elapsed times then the power control circuit 20 operates in the reduced mode and boosted mode respectively.
  • the heating element is operated at a power level lower than the steady state power level for the current power setting.
  • the boost mode the heating element is operated at a power level higher than the power level for the thermostatic mode e.g. in the boost mode the power directed to the elements may be 20 to 60% higher than that in the thermostatic mode, for the same measured difference between instantaneous element temperature and the setpoint temperature.
  • Control mode selection according to rate of temperature decrease The power control circuit 20 may also respond to an abnormally high thermal load, which tends to reduce the temperature of the elements at a faster rate than normal, operating in the boosted response mode to boost power in order that styling performance is not compromised.
  • Fig. 5 illustrates such an abnormally high heat load on the appliance in the form of a 6 gramme hair emulator.
  • memory in the power control circuit 20 may store the reference rates of decrease that are higher than the first predetermined rates of decrease. When the measured rate of decrease lies between the reference rate of decrease and the first predetermined rate of decrease (e.g.
  • the power control circuit 20 controls the heating elements 13, 14 in the thermostatic control mode, for instance power is increased in proportion to the difference between the measured element temperature and the setpoint temperature corresponding to the steady state power level.
  • the control circuit operates the heating element in the boosted mode at successively higher boost power levels (above those defined by the conventional thermostatic control schema) until there is detected a measured rate of decrease of heating element temperature less than the reference rate, or a heating element temperature at a setpoint temperature corresponding to the steady state power output.
  • the power control circuit 20 gradually decreases the power level applied to the heating element until the applied power level again equals the steady state power level or temperature, or until detection of an abnormally low thermal load recurs. When the steady state power level or temperature is reached, the power control circuit 20 reverts to the normal thermostatic control mode.

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  • Control Of Temperature (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

Appareil à coiffer, qui possède un dispositif de commande à régulation de température pour atténuer les dégâts provoqués sur les cheveux dus à la chaleur. L'appareil comprend une paire de mâchoires chauffées (10, 11) qui peuvent être fermées pour saisir les cheveux. Un circuit de commande d'alimentation (20) répond à un capteur d'activation (22) qui détecte le moment où les mâchoires (10, 11) sont fermées, et à un capteur de température (21) qui détecte la température d'un élément chauffant (13, 14) sur les mâchoires (10, 11). Le circuit de commande d'alimentation (20), en réponse à la première sortie d'activation, commence à contrôler la vitesse de changement de la température de l'élément chauffant (13, 14), et en réponse à une vitesse de diminution au-dessus d'un niveau prédéfini, fait fonctionner l'élément chauffant (13, 14) à un niveau de puissance inférieur à un niveau de puissance d'état stabilisé.
PCT/CN2013/089988 2013-09-30 2013-12-19 Fer à coiffer WO2015043094A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13894780.9A EP3051974B1 (fr) 2013-09-30 2013-12-19 Fer à coiffer
CN201380081147.1A CN105764376B (zh) 2013-09-30 2013-12-19 头发造型烫发器
US15/025,929 US20160213117A1 (en) 2013-09-30 2013-12-19 Hair styling iron

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HK13111187.5 2013-09-30
HK13111187 2013-09-30

Publications (1)

Publication Number Publication Date
WO2015043094A1 true WO2015043094A1 (fr) 2015-04-02

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PCT/CN2013/089988 WO2015043094A1 (fr) 2013-09-30 2013-12-19 Fer à coiffer

Country Status (4)

Country Link
US (1) US20160213117A1 (fr)
EP (1) EP3051974B1 (fr)
CN (1) CN105764376B (fr)
WO (1) WO2015043094A1 (fr)

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WO2017100229A1 (fr) 2015-12-09 2017-06-15 Spectrum Brands, Inc. Système et procédé de contrôle de température pour appareil de coiffure
WO2022023715A1 (fr) * 2020-07-29 2022-02-03 Dyson Technology Limited Dispositif de coiffure

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CN107467853A (zh) * 2017-09-25 2017-12-15 深圳市奋达科技股份有限公司 一种声波直发器
GB2569660B (en) 2017-12-22 2022-03-02 Jemella Ltd Thermal control apparatus and method
EP3524086A1 (fr) * 2018-02-09 2019-08-14 Koninklijke Philips N.V. Fer à lisser
GB2574008B (en) * 2018-05-21 2022-06-22 The House Of Curls Ltd Hair Styling Device
CN111781972B (zh) * 2020-06-24 2022-01-04 惠州拓邦电气技术有限公司 一种洗脚盆、洗脚盆的温度控制方法及其装置
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WO2017100229A1 (fr) 2015-12-09 2017-06-15 Spectrum Brands, Inc. Système et procédé de contrôle de température pour appareil de coiffure
EP3386341A4 (fr) * 2015-12-09 2019-07-31 Spectrum Brands, Inc. Système et procédé de contrôle de température pour appareil de coiffure
EP3766375A1 (fr) 2015-12-09 2021-01-20 Spectrum Brands, Inc. Système et procédé de contrôle de température pour appareil de coiffure
WO2022023715A1 (fr) * 2020-07-29 2022-02-03 Dyson Technology Limited Dispositif de coiffure
JP7564937B2 (ja) 2020-07-29 2024-10-09 ダイソン・テクノロジー・リミテッド ヘアスタイリング用デバイス

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EP3051974A1 (fr) 2016-08-10
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CN105764376A (zh) 2016-07-13
EP3051974A4 (fr) 2017-07-19
EP3051974B1 (fr) 2018-08-29

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