EP4292469A1 - Contrôle de la température d'une unité fonctionnelle d'un dispositif de coiffure - Google Patents

Contrôle de la température d'une unité fonctionnelle d'un dispositif de coiffure Download PDF

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Publication number
EP4292469A1
EP4292469A1 EP22179375.5A EP22179375A EP4292469A1 EP 4292469 A1 EP4292469 A1 EP 4292469A1 EP 22179375 A EP22179375 A EP 22179375A EP 4292469 A1 EP4292469 A1 EP 4292469A1
Authority
EP
European Patent Office
Prior art keywords
action
functional unit
styling
temperature
styling device
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.)
Pending
Application number
EP22179375.5A
Other languages
German (de)
English (en)
Inventor
Chuen Yu Cyrus PANG
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP22179375.5A priority Critical patent/EP4292469A1/fr
Priority to PCT/EP2023/066057 priority patent/WO2023242317A1/fr
Publication of EP4292469A1 publication Critical patent/EP4292469A1/fr
Pending 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
    • A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
    • A45D1/16—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with a single heated member
    • 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
    • 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
    • A45D6/00—Details of, or accessories for, hair-curling or hair-waving devices
    • A45D6/02—Devices for winding the hair upon steep-curlers

Definitions

  • the invention relates to a styling device comprising a functional unit configured to perform a styling action on an item to be styled during use of the styling device, and further comprising a heating arrangement configured to heat the functional unit, and a processor configured to control operation of the styling device, wherein the processor is configured to apply a temperature control algorithm after the heating arrangement has been operated to initially heat up the functional unit to a temperature in an operational range of temperatures, the temperature control algorithm being designed to operate the heating arrangement to keep the temperature of the functional unit in the operational range of temperatures.
  • WO 2017/029382 A1 discloses an automatic hair curler comprising a handle, a housing, a barrel element, a heater to heat the barrel element, a hair winder component rotatable around the barrel element, a driving device to drive the hair winder component, and a hair curling cavity having an opening at an upper end being formed between an inner surface of the hair winder component and an outer surface of the barrel element.
  • An upper end of the housing has a notch which extends downwardly from a top end face of the housing, and which communicates with the opening of the hair curling cavity.
  • hair wrapping portions are provided on the hair winder component to wrap the hair around the barrel element when the hair winder component is rotating.
  • hair is placed in the notch provided in the housing and can enter the hair curling cavity from the notch, and hair can be wrapped around the barrel element when the hair winder component rotates so that an automatic curling can be realized.
  • an automatic hair curler relies on an internal temperature sensor and a microprocessor to control the temperature of the barrel element.
  • the temperature of the barrel element will drop significantly, and it will take some time before the internal temperature sensor detects the temperature drop and signals the microprocessor to compensate for the heat loss by powering up the heater which serves to heat the barrel element.
  • the hair tress is exposed to less heat than desired, and as a consequence, it will take longer before the desired styling effect of the hair tress is reached.
  • the hair tress will be subjected to less and less heat in a first instance, and a person using the hair curler, who will hereinafter be referred to as user, needs to wait for a significantly longer time as compared to a theoretical case in which the temperature of the barrel element is continuously at an operational level as envisaged, and/or needs to increase the temperature setting in order to obtain the desired styling effect.
  • the temperature drop referred to may be as large as 10°C, for example.
  • the invention provides a styling device comprising a functional unit configured to perform a styling action on an item to be styled during use of the styling device, and further comprising a heating arrangement configured to heat the functional unit, and a processor configured to control operation of the styling device, wherein:
  • the invention introduces a feedforward control procedure to compensate for expected heat loss on the functional unit of a styling device, triggered by input indicating that a styling action is to be performed.
  • the processor of the styling device which may be a microprocessor in practical cases, is configured to use such input to start powering up the heating arrangement at an appropriate level of power. In this process, different from what is known in the art, there is no need to wait for a temperature sensor to react to an initial temperature drop at the functional unit.
  • the heating arrangement is automatically operated such that a temperature of the functional unit is put to a level that is sufficiently high to compensate for heat loss resulting from initial contact or proximity of the item to be styled to the functional unit, so that effectiveness of the styling action is preserved by realizing a more steady styling temperature, and both the duration of the styling action and the temperature of the functional unit can be kept within acceptable limits.
  • the appropriate level of power at which the heating arrangement is operated in the feedforward control procedure is a percentage of its full power, which may be a fixed percentage of its full power throughout the entire time that the feedforward control procedure is executed.
  • the percentage is chosen in relation to factors including an expected value of the initial temperature drop, the operational range of temperatures, and the time that is available to operate the heating arrangement in this anticipatory fashion.
  • a hair curler as described in the foregoing normally comprises a start winding button which is to be depressed by a user at the moment that a hair tress has been properly placed in the notch provided in the housing and it is intended to initiate a hair curling action, and which is to be kept depressed throughout the hair curling action.
  • the event of the processor receiving input indicating that a styling action is to be performed is initiated as soon as the user depresses the start winding button.
  • the feedforward control procedure is initiated, as a result of which the barrel element is heated by the heating arrangement at higher power than in conventional cases, namely at a percentage of full power of the heating arrangement.
  • the temperature of the barrel element is put to such a level that the temperature drop resulting from contact of the hair to the barrel element does not cause the temperature to get so low that the hair curling action is significantly hampered, so that the hair tress to be curled can be exposed to heat more closely related to the temperature setting specified by the user.
  • the temperature control algorithm is configured to terminate the feedforward control procedure when an operational time period after initiation of the feedforward control procedure has expired, or earlier when the input indicating that a styling action is to be performed is removed before that time.
  • the styling device according to the invention is a hair curler as suggested earlier
  • the level of power at which the heating arrangement is operated is adapted to the level of the operational range of temperatures of the functional unit.
  • the temperature control algorithm is configured to determine the percentage of full power of the heating arrangement in dependence on a level of the operational range of temperatures of the functional unit.
  • the temperature control algorithm is configured to apply a relation between the percentage of full power of the heating arrangement and the level of the operational range of temperatures of the functional unit according to which the percentage decreases as the level of the operational range of temperatures increases, so that a lower percentage of full power is chosen when the temperature of the functional unit needs to be higher and problems of overheating are avoided under all circumstances, and the percentage increases as the level of the operational range of temperatures decreases.
  • An example of a default percentage is 80%, an example of a percentage which may be chosen at a higher temperature level is 70%, and an example of a percentage which may be chosen at a lower temperature level is 90%.
  • the styling device comprises a user interface configured to enable a user to provide the processor with input, including the input indicating that a styling action is to be performed, wherein it may be so that the user interface is configured to provide the processor with the input indicating that a styling action is to be performed as long as the user interacts with the user interface.
  • the processor is configured to determine, e.g., via a suitable sensor, that despite the processor being provided with input indicating that a styling action is to be performed, an item to be styled is absent, and to prevent initiation of the action of operating the heating arrangement at a percentage of its full power if that is found to be true, indeed.
  • the conditional action may also be implemented in the following manner:
  • the styling device comprises a temperature sensing arrangement, and if the temperature control algorithm is configured to operate the temperature sensing arrangement to provide the value which is representative of an actual temperature of the functional unit.
  • the internal temperature sensor of the auto curler may be used in the process of performing the safety check.
  • this range may include the operational range of temperatures plus all lower temperatures plus higher temperatures in a limited additional range, such as an additional range of 5°C, which does not alter the fact that the invention covers other options as well.
  • the temperature control algorithm includes a feedback control procedure besides the feedforward control procedure defined and explained in the foregoing, as follows:
  • the styling device comprises a unit configured to provide a warning signal to a person, wherein the processor is configured to activate the unit when a time period during which the input indicating that a styling action is to be performed is received exceeds a maximum.
  • the processor is configured to activate the unit when a time period during which the input indicating that a styling action is to be performed is received exceeds a maximum.
  • the invention covers numerous types of styling devices, including a hair-styling device in which the functional unit is configured to perform a styling action on at least a portion of a person's hair.
  • the styling device according to the invention may particularly be an automatic hair curler comprising a rotatable hair winder component configured to engage on a hair tress, wherein the functional unit comprises a barrel element encompassed by the hair winder component.
  • the input indicating that a styling action is to be performed is generated when the hair winder component is activated to rotate.
  • an automatic hair curler comprising a barrel element around which a hair tress is to be wound, a heater to heat the barrel element, and a microprocessor which is programmed to control the temperature of the heater in such a way that a temperature-reducing effect of contact of a hair tress to be curled to the barrel element is anticipated, which helps in keeping the temperature of the barrel element in an operational range of temperatures so that an effective hair curling action can be realized.
  • Fig. 1 shows an automatic hair curler 100 which is designed to be used for performing a curling action on hair, and which comprises the following components:
  • the hair curler 100 is an example of a styling device according to the invention, wherein the barrel element 40 functions as a functional unit and the combination of the heater 60 and the adapter 61 is a practical embodiment of a heating arrangement configured to heat the functional unit.
  • a view of the portion of the hair curler 100 which is located on top of the handle 10 is provided by Fig. 2 , whereas in Fig. 3 , the heater 60, the adapter 61 and the temperature sensor 80 as located inside the barrel element 40 can be seen.
  • the motor 31 of the hair winder component 30 and the microprocessor 50 are represented by dashed rectangles.
  • the microprocessor 50 is programmed to operate the heater 60 in such a way that a situation in which said amount of heat loss drastically reduces effectiveness of the hair curling action, at least during the first seconds of said action, is avoided.
  • the microprocessor 50 is programmed to feedforward control the temperature of the barrel element 40 upon initial depression of the start winding button 71.
  • the temperature control algorithm includes a feedforward control procedure involving an action of operating the heater 60 at a percentage of its full power, which feedforward control procedure is initiated when the user depresses the start winding button 71. Executing the feedforward control procedure results in immediate compensation of the heat loss resulting from contact of the hair to the barrel element 40. The percentage is chosen in relation to the predicted amount of heat loss, so that the resulting temperature of the barrel element 40 is well in or at least close to the operational range of temperatures.
  • the user interface 70 includes a button 72 for enabling the user to choose a temperature setting of the hair curling action, wherein it is to be noted that the operational range of temperatures as applied to the temperature of the barrel element 40 is directly related to said temperature setting.
  • the hair curler 100 is operated as follows.
  • An initial position of the hair winder component 30 is such that the notch 22 is free to receive a hair tress.
  • the user holds the handle 10 of the hair curler 100 in one hand, inserts a hair tress through the notch 22 with the other hand, and depresses the start winding button 71 with a finger of the first hand to start a hair curling action.
  • the hair winder component 30 will start rotating around the barrel element 40 for a defined number of revolutions and thereby force the length of the hair to wind around the barrel element 40.
  • the microprocessor 50 Once the start winding button 71 is depressed, the microprocessor 50 will be signaled to trigger the feedforward control procedure of the temperature control algorithm.
  • the feedforward control procedure starts with checking the loading of hair in the hair curler 100.
  • this can be done by checking the actual temperature at the temperature sensor 80.
  • a safety range which may be a range of temperatures including temperatures below the temperature setting and temperatures up to 5°C higher than the temperature setting, for example, the heater 60 is powered with a percentage of its full power during a period of time, such as with 80% of its full power for 6 seconds.
  • the heat generated in this way is sufficient to compensate for the predicted heat loss due to the loading introduced by the hair tress onto the barrel element 40.
  • thermocouples e.g., three thermocouples
  • a data logger is connected to the thermocouples, so that it is possible to accurately monitor the temperature at the outer surface of the barrel element 40, and to perform the following sequence of steps for different temperature settings:
  • the user keeps the start winding button 71 depressed throughout the entire hair curling action.
  • the hair curler 100 is equipped with a unit configured to signal the user (not shown), which unit is controlled by the microprocessor 50 on the basis of a timer functionality.
  • the microprocessor 50 is configured to activate the unit when a certain amount of time has passed after the start winding button 71 is initially depressed, e.g., 8 seconds, so that the user may know when the hair curling action is completed and the start winding button 71 can be released.
  • the signal can be in a beeping sound format from a built-in speaker, or in a vibration feedback format generated from a built-in haptic motor, or in a visual format such as blinking light.
  • the user interface 70 includes a button 73 for enabling the user to choose a time duration of the hair curling action and to thereby set the moment at which the unit is activated.
  • the user is supposed to remove the curled hair tress from the hair curler 100.
  • the user interface 70 includes a button 74 by means of which the user can set the direction of rotation of the hair winder component 30.
  • the duration of the feedforward control procedure can normally be shorter than the duration of the hair curling action.
  • conventional feedback control of the temperature of the barrel element 40 is applied. This may be done in any suitable way. In the present example, this involves use of the built-in temperature sensor 80 by the microprocessor 50 to monitor the temperature of the barrel element 40 and to control the power of the heater 60 to keep the temperature of the barrel element 40 to be around the temperature setting. This feedback control of the heater 60 can put the hair curler 100 in an idling state until the start winding button 71 is depressed again, which will trigger the feedforward control again.
  • start winding button 71 If the start winding button 71 is released before the complete time period of the feedforward control procedure has passed, the feedforward control procedure is aborted and the feedback control procedure is initiated at that point.
  • An occasion at which the feedback control procedure is continued despite of the start winding button 71 being depressed is when it follows from the safety check described earlier that the actual temperature of the barrel element 40 is outside of the safety range.
  • the feedforward procedure is unique for each setting, wherein when a higher temperature setting is selected, the power of the heater 60 is set to be lower, and when a lower temperature setting is selected, the power of the heater 60 is set to be higher.
  • a default percentage of full power of the heater 60 is 80%
  • a lower percentage of full power of the heater 60 is 70%
  • a higher percentage of full power of the heater 60 is 90%.
  • the duration of the feedforward control procedure can be the same under all circumstances, wherein 6 seconds may be a practical example, as suggested earlier.
  • a styling device such as a hair curler 100 which is of the type comprising a functional unit 40, a heating arrangement 60, 61 configured to heat the functional unit 40, and a processor 50 configured to control operation of the styling device.
  • a temperature control algorithm as applied by the processor 50 after the heating arrangement 60, 61 has been operated to initially heat up the functional unit 40 to a temperature in an operational range of temperatures includes a feedforward control procedure involving an action of operating the heating arrangement 60, 61 at a percentage of its full power, which is beneficial to effectiveness of the styling action as this helps to prevent the temperature of the functional unit 40 from initially dropping to a level which is significantly lower than envisaged as a result of initial contact or proximity of the item to be styled to the functional unit 40. All that the controller 50 needs to trigger the feedforward control procedure is receipt of input indicating that a styling action is to be performed, and throughout the action of operating the heating arrangement 60, 61 at a percentage of its full power, there is no need for input about an actual temperature of the functional unit 40.

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  • Hair Curling (AREA)
EP22179375.5A 2022-06-16 2022-06-16 Contrôle de la température d'une unité fonctionnelle d'un dispositif de coiffure Pending EP4292469A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22179375.5A EP4292469A1 (fr) 2022-06-16 2022-06-16 Contrôle de la température d'une unité fonctionnelle d'un dispositif de coiffure
PCT/EP2023/066057 WO2023242317A1 (fr) 2022-06-16 2023-06-15 Régulation de température d'une unité fonctionnelle d'un dispositif de coiffage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22179375.5A EP4292469A1 (fr) 2022-06-16 2022-06-16 Contrôle de la température d'une unité fonctionnelle d'un dispositif de coiffure

Publications (1)

Publication Number Publication Date
EP4292469A1 true EP4292469A1 (fr) 2023-12-20

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ID=82117275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22179375.5A Pending EP4292469A1 (fr) 2022-06-16 2022-06-16 Contrôle de la température d'une unité fonctionnelle d'un dispositif de coiffure

Country Status (2)

Country Link
EP (1) EP4292469A1 (fr)
WO (1) WO2023242317A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477834A (en) * 2010-08-31 2011-08-17 Jemella Ltd Hair styling appliance with heating zones
WO2016132116A1 (fr) * 2015-02-19 2016-08-25 Jemella Limited Appareil de coiffure
WO2017029382A1 (fr) 2015-08-19 2017-02-23 Koninklijke Philips N.V. Fer à boucler les cheveux automatique
KR20210059311A (ko) * 2019-11-15 2021-05-25 김은지 헤어용 고데기

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477834A (en) * 2010-08-31 2011-08-17 Jemella Ltd Hair styling appliance with heating zones
WO2016132116A1 (fr) * 2015-02-19 2016-08-25 Jemella Limited Appareil de coiffure
WO2017029382A1 (fr) 2015-08-19 2017-02-23 Koninklijke Philips N.V. Fer à boucler les cheveux automatique
KR20210059311A (ko) * 2019-11-15 2021-05-25 김은지 헤어용 고데기

Also Published As

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