WO2001098852A1 - Temperature control method for a depilatory apparatus wax reservoir - Google Patents

Temperature control method for a depilatory apparatus wax reservoir Download PDF

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Publication number
WO2001098852A1
WO2001098852A1 PCT/FR2001/001834 FR0101834W WO0198852A1 WO 2001098852 A1 WO2001098852 A1 WO 2001098852A1 FR 0101834 W FR0101834 W FR 0101834W WO 0198852 A1 WO0198852 A1 WO 0198852A1
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WO
WIPO (PCT)
Prior art keywords
temperature
heating element
wax
value
setpoint
Prior art date
Application number
PCT/FR2001/001834
Other languages
French (fr)
Inventor
Thierry Gailhard
Marc Legrain
Original Assignee
Seb S.A.
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 Seb S.A. filed Critical Seb S.A.
Priority to AU67642/01A priority Critical patent/AU6764201A/en
Publication of WO2001098852A1 publication Critical patent/WO2001098852A1/en

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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
    • A45D26/00—Hair-singeing apparatus; Apparatus for removing superfluous hair, e.g. tweezers
    • A45D26/0014—Hair-singeing apparatus; Apparatus for removing superfluous hair, e.g. tweezers using wax
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G05D23/2401—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor using a heating element as a sensing element

Definitions

  • the invention relates to the field of small household appliances, and more particularly to wax applicators intended for hair removal. It relates more specifically to a process for regulating the temperature of the reservoir of such devices, allowing an optimization of its operation, and more precisely a faster rise in temperature of the wax, and its maintenance at the optimum temperature for the application.
  • the waxing apparatuses include a heating tank containing the wax.
  • the tank is generally heated by an electrically powered heating resistor, which dissipates energy and therefore heats the wax.
  • wax and in particular that used for hair removal operations, is a relatively poor thermal conductor. It follows that the diffusion of heat inside the wax is done with some difficulties, and that the temperature is distributed heterogeneously inside the tank. We therefore observe the presence of much hotter zones than others, which induces problems for a uniform application of the wax. In addition, when the wax is raised to a too high temperature, there may appear risks of burns by the user, and modifications of the mechanical properties of the wax making it unsuitable or at least ineffective for hair removal.
  • a first problem which the invention therefore proposes to solve is that of the homogeneity of the heating of the wax.
  • the solution of using the thinnest possible layers of wax has drawbacks since it is difficult to determine the temperature of a thin layer with cost sensors in relation to the cost price of a wax epilator. In addition, it is difficult to reduce the thickness of the wax layer in the configurations where the wax container can be removable with respect to the rest of the device, and in particular of the heating resistance.
  • Another problem that the invention proposes to solve is that of the difficulty of measuring the temperature of a thin layer of wax while remaining compatible with ranges of low cost sensors.
  • a third problem which the invention therefore proposes to solve is that of being able to ensure rapid heating of the wax and maintenance at uniform temperature despite the thermal inertia of the wax.
  • the invention therefore proposes to provide a method for regulating the heating of the wax which ensures both the possibility of rapidly increasing the temperature, while allowing maintenance at an almost constant temperature when the wax is already hot, without causing harmful temperature overshoot.
  • the invention therefore relates to a method for regulating the temperature of a reservoir of a waxing appliance, said reservoir being equipped with an electric heating element, and in which said heating element is supplied according to a cycle of operation comprising periods during which the heating element is connected to a source of electrical energy, and periods during which the heating element is not supplied, the transition from one period to another being determined by comparison the value of the temperature of the heating element in relation to a temperature setpoint.
  • This process is characterized in that the temperature setpoint is dynamically adjusted as a function of the value of the duration of the previous period during which the heating element was not supplied.
  • the regulation method according to the invention is based on the measurement of a temperature which is not that of the wax but that of the heating element.
  • the method according to the invention makes it possible to measure the quantity of energy which is dissipated by the heating element, and which is therefore transmitted to the wax.
  • the amount of energy transmitted to the wax is dependent on the temperature of the heating element that is being measured, and on the temperature of the wax.
  • the variation in the amount of energy transmitted to the wax over time is a function of the amount of wax present in the tank.
  • This method is therefore a method for metering the energy of the heating element.
  • the amount of energy absorbed by the wax is measured by measuring the on and off times of the heating element controlled by the regulating device operating according to the method according to the invention.
  • the periods during which the heating element is not supplied have an elongating duration, this means that a smaller amount of energy is transmitted to the wax, and that therefore the wax is already at a sufficient temperature.
  • the periods of non-supply of the heating element are shorter, this means that the temperature of the wax is relatively low, and that it is necessary for the heating element to be supplied in a more supported to dissipate a greater amount of energy which will be transmitted to the wax, and which will in turn raise the temperature of the heating element.
  • the regulating device finds that the periods of non-supply reduce duration, it increases the temperature setpoint so that the transitions between the periods of supply and the periods of non-supply occur less frequently when the temperature of the heating element has risen markedly.
  • the temperature of the heating element is obtained from a specific sensor, in particular by a probe or a temperature sensor of the CTN or CTP type.
  • the invention covers also the variants in which the temperature measurement of the heating element is determined by the measurement of its electrical resistance, which is possible in particular thanks to the use of resistors with positive or negative temperature coefficient.
  • the temperature setpoint of the heating element can also be adjusted as a function of the comparison of the value of the temperature of the heating element with a temperature threshold.
  • the temperature setpoint when the temperature of the heating element is below a certain threshold, for example when a new cold wax cartridge has been inserted into the appliance, the temperature setpoint can be set at a high value, to ensure an almost continuous supply and a very high energy dissipation, so that the temperature of the wax rises very quickly. Conversely, when the temperature of the heating element has reached a value above this particular threshold, signifying that the wax is already at a usage temperature, the temperature setpoint is then set at a low level to ensure a transmission of minimum energy sufficient for maintaining the temperature.
  • the invention also relates to a waxing apparatus comprising a reservoir equipped with an electric heating element and means for supplying said heating element according to an operating cycle comprising periods during which the heating element is connected to a source. of electric energy and periods during which the heating element is not supplied, the transition from one period to another being effected by means for determining the comparison of the value of the temperature of the heating element by with respect to a temperature setpoint, because it includes means for dynamically adjusting said temperature setpoint as a function of the value of the duration of the previous period during which the heating element was not supplied.
  • Figure 1 is a general diagram of a waxing device.
  • FIG. 2 is a time diagram showing the evolution of the temperature setpoint, and of the temperature of the heating element as well as the state of supply of the heating element over time.
  • Figure 3 is a time diagram illustrating the evolution of the temperature setpoint and the temperature of the heating element over time, in the case of a change of wax cartridge.
  • a waxing device 1 consists, as illustrated in FIG. 1, of an applicator 2 which includes a reservoir 3 which itself includes a heating element 4.
  • this applicator 2 can be removably mounted relative to a base 5.
  • the gripping zone 16 can be placed inside a housing 8 when the applicator 2 must be supplied with energy.
  • This base 5 includes an electronic regulation device 6, itself connected to the sector by an appropriate cord 7.
  • the heating element 4 can be constituted by a heating resistor or also by a heating element of the PTC type, or any other type of heating element suitable for this type of use. It can be extended by a heating tongue 9 coming into contact with the wax cartridge or the reservoir
  • the heating element 4 is electrically supplied by the regulating device 6 so that the quantity of energy transmitted to the wax is optimized to ensure a rapid rise in temperature and a temperature maintenance in steady state.
  • the temperature of the wax is not measured directly by a sensor which would plunge inside the latter.
  • the regulating device 6 is however informed of the temperature of the heating element 4 itself. This temperature is determined by knowing the variation in the temperature of the heating element 4 measured by a sensor 15, in contact with the heating tongue 9, the signal of which is routed to the regulation device. In the case where the sensor 15 is of the CTN or CTP type, the determination of this temperature is made by knowing the variation in the value of its electrical resistance as a function of the temperature of the heating element 4.
  • the electric heating element 4 is supplied or disconnected from the source of electric energy as a function of the comparison of its temperature with respect to a set value.
  • this set value is dynamically adjusted according to the measurement of certain parameters of the operating cycle.
  • this setpoint is adjusted as a function of the amount of energy dissipated by the heating element, and therefore transmitted to the wax. More precisely, the quantity of energy transmitted is determined by an evaluation of the different times of supply and non-supply of the heating element.
  • the heating element 4 is not supplied, and the temperature T measured by the probe or sensor 15, decreases (see curve 10). From ti, the temperature of the heating element 4 drops below the low set value set at 70 ° C minus a hysteresis value of 1 ° C.
  • the regulating device 6 ensures the connection of the heating element with the source of electrical energy up to t 2 . At this instant, the temperature T of the heating element 4 having exceeded the value of the low set point of 70 ° C., the heating element 4 is then disconnected from its power source.
  • the temperature of the heating element continues to rise for a certain time, to reach the summit, then to decrease.
  • the electric heating element 4 is then again supplied by the source d 'energy. Its temperature then rises until it exceeds the basic setpoint. Since the duration of non-supply or the reset time between two supply cycles t 0ff ( i.e. t 3 - 1 2 ) is greater than a high threshold, fixed at 120 seconds, the temperature setting of the heating element remains at its low level of 70 ° C. From, the temperature of the heating element follows a variation similar to that having followed t 2 . This corresponds to the operation at rest with the heating element which regulates at a low temperature level corresponding to the dose of energy just necessary to maintain the temperature of an already hot wax cartridge.
  • the on and off cycles change.
  • the running times get longer, those of the stops decrease.
  • the electronic system decides to keep the same temperature level or to move to higher levels for a predetermined time in order to deliver a dose of additional energy to bring the wax to the right temperature as quickly as possible.
  • the heating element is then supplied.
  • the duration of non-supply t 0 ff, measured between t 5 and being situated between two duration thresholds fixed at 110 and 120 seconds, the value of the temperature setpoint is then adjusted to an average value, typically equal to 98 ° C.
  • the heating element is supplied for a longer duration than the preceding durations, so that the temperature of the heating element reaches said average set point of 98 ° C., which occurs at t 6 .
  • the heating element is then disconnected from the source power supply and the temperature due to the thermal inertia of the wax rises to a maximum value then decreases.
  • the temperature has dropped below the low setpoint minus the hysteresis value and the heating element is then re-supplied.
  • the electric heating element 4 being re-supplied, the temperature after having reached its minimum, rises to exceed, at the instant te, the low set point of 70 ° C. Between t 8 and t-io, the temperature follows the same cycle as between t 2 and t. Between tio and tu, the heating element being no longer supplied, the temperature reaches its maximum to fall below the low setpoint minus the hysteresis value in tu. The system therefore returns to the level during regulation for maintaining the temperature of this new cartridge.
  • the duration t 0ff corresponding to t ⁇ o - tu during which the heating element has not been supplied is less than the second duration threshold, fixed at 110 seconds.
  • the temperature setpoint is fixed at its high value chosen typically at 103 ° C.
  • the heating element is then supplied for a longer period, up to t ⁇ 2 . Thereafter, when the heating element is no longer supplied, the temperature follows a decrease substantially similar to that observed from t 6 .
  • the amount of energy supplied to the heating element is therefore effectively adjusted to obtain as constant a temperature maintenance as possible, and a rise as rapid as possible, taking into account the dissipative capacities of the heating element 4.
  • FIG. 3 illustrates another aspect of the invention which is particularly useful for raising the temperature and changing the wax cartridges.
  • the temperature setpoint (curve 13) is kept at a low value, corresponding to 70 ° C.
  • the heating element is supplied in such a way that its temperature (curve 12) increases in order to pass above this low set point value of 70 ° C.
  • the temperature and the supply follows an operating cycle already described for the previous figure in which the set value is maintained at a low level since the non-supply time t off , corresponding respectively to t 22 - t 2 ⁇ , and to t 24 - 1 23 , are greater than the duration threshold of 120 seconds.
  • the wax cartridge is changed, explaining the non-continuity of the curve reflecting the variation in the temperature of the heating element 4.
  • the cartridge being new or cold, its temperature is low, close to or below ambient temperature. It follows that the regulating device 6 which detects this temperature value determines that it is below the aforementioned temperature threshold of 50 ° C. Consequently, the temperature setpoint remains fixed at a high value corresponding to a start-up setpoint, close to 113 ° C.
  • the heating element is supplied for a relatively long time, between t 26 and t 27 , until its temperature reaches 113 ° C. From this moment there, and after t 27 , the heating element is no longer supplied and its temperature after a slight continuation of its ascent decreases until it descends, in t 28 below the low setpoint minus one hysteresis. The feeding cycle is then resumed on the basis of a lower setpoint. The temperature rise was ensured very quickly, by a continuous supply between t 26 and t 27 .
  • cartridges of different size or containing waxes with different melting temperatures can be detected by the electronic device which then adjusts the parameters (supply duration thresholds, temperature steps) according to the cartridge detected.

Abstract

The invention concerns a temperature control method for a depilatory apparatus wax reservoir, said reservoir being equipped with an electrical heating element and wherein said element is powered according to an operating cycle including periods during which the heating element is connected to an electrical power source, and periods during which the heating element is not powered, the transition from one period to the other being determined with respect to a set point temperature. The invention is characterised in that said set point temperature is dynamically adjusted based on the value of the duration of the preceding period during which the heating element was not powered.

Description

PROCEDE DE REGULATION DE LA TEMPERATURE DU RESERVOIR D'UNMETHOD FOR REGULATING THE TANK TEMPERATURE OF A
APPAREIL D'EPILATION A LA CIREWAX REMOVAL APPARATUS
Domaine techniqueTechnical area
L'invention se rattache au domaine du petit électroménager, et plus particulièrement aux appareils applicateurs de cire destinés à l'épilation. Elle concerne plus spécifiquement un procédé de régulation de la température du réservoir de tels appareils, permettant une optimisation de son fonctionnement, et plus précisément une montée en température de la cire plus rapide, et son maintien à la température optimale pour l'application.The invention relates to the field of small household appliances, and more particularly to wax applicators intended for hair removal. It relates more specifically to a process for regulating the temperature of the reservoir of such devices, allowing an optimization of its operation, and more precisely a faster rise in temperature of the wax, and its maintenance at the optimum temperature for the application.
Techniques antérieuresPrevious techniques
De façon connue, les appareils d'épilation à la cire comprennent un réservoir chauffant contenant la cire. Le réservoir est généralement chauffé par une résistance chauffante alimentée électriquement, qui dissipe de l'énergie et donc chauffe la cire.In known manner, the waxing apparatuses include a heating tank containing the wax. The tank is generally heated by an electrically powered heating resistor, which dissipates energy and therefore heats the wax.
De façon connue, on sait que la cire, et notamment celle utilisée pour les opérations d'épilation, est un relativement mauvais conducteur thermique. Il s'ensuit que la diffusion de la chaleur à l'intérieur de la cire se fait avec quelques difficultés, et que la température est répartie de façon hétérogène à l'intérieur du réservoir. On constate donc la présence de zones beaucoup plus chaudes que d'autres, ce qui induit des problèmes pour une application uniforme de la cire. En outre, lorsque la cire est montée à une température trop élevée, il peut apparaître des risques de brûlures de l'utilisateur, et des modifications des propriétés mécaniques de la cire la rendant inapte ou tout au moins peu efficace pour l'épilation.As is known, it is known that wax, and in particular that used for hair removal operations, is a relatively poor thermal conductor. It follows that the diffusion of heat inside the wax is done with some difficulties, and that the temperature is distributed heterogeneously inside the tank. We therefore observe the presence of much hotter zones than others, which induces problems for a uniform application of the wax. In addition, when the wax is raised to a too high temperature, there may appear risks of burns by the user, and modifications of the mechanical properties of the wax making it unsuitable or at least ineffective for hair removal.
Un premier problème que se propose donc de résoudre l'invention est celui de l'homogénéité du chauffage de la cire.A first problem which the invention therefore proposes to solve is that of the homogeneity of the heating of the wax.
La solution consistant à utiliser des couches de cire les plus fines possibles présente des inconvénients puisqu'il est difficile de déterminer la température d'une couche fine avec des capteurs d'un coût en rapport avec le prix de revient d'un épilateur à cire. En outre, il est difficile de réduire l'épaisseur de la couche de cire dans les configurations où le contenant de la cire peut être amovible par rapport au reste de l'appareil, et notamment de la résistance chauffante.The solution of using the thinnest possible layers of wax has drawbacks since it is difficult to determine the temperature of a thin layer with cost sensors in relation to the cost price of a wax epilator. In addition, it is difficult to reduce the thickness of the wax layer in the configurations where the wax container can be removable with respect to the rest of the device, and in particular of the heating resistance.
Un autre problème que se propose de résoudre l'invention est celui de la difficulté de mesurer la température d'une fine couche de cire tout en restant compatible avec des gammes de capteurs de faible coût.Another problem that the invention proposes to solve is that of the difficulty of measuring the temperature of a thin layer of wax while remaining compatible with ranges of low cost sensors.
Par ailleurs, pour s'affranchir des problèmes de régulation en température, on a déjà proposé des solutions consistant à utiliser des résistances chauffantes dont la puissance est telle qu'elles fonctionnent par "dissipation totale", sans limitation de température. Toute l'énergie dissipée par la résistance sert à chauffer la cire et cette résistance est dimensionnée pour qu'en régime établi, elle contribue à maintenir la cire à une température, optimale pour l'application, typiquement voisine de 65°C. Or, une telle solution présente l'inconvénient majeur d'assurer la montée en température, à partir de la température ambiante, en un temps beaucoup trop long. En effet, l'utilisateur souhaite généralement, que le temps de montée en température soit le plus court possible pour que son appareil soit opérationnel très rapidement.Furthermore, to overcome the problems of temperature regulation, solutions have already been proposed consisting in using heating resistors whose power is such that they operate by "total dissipation", without limitation of temperature. All the energy dissipated by the resistance is used to heat the wax and this resistance is dimensioned so that, under steady conditions, it helps to maintain the wax at a temperature, optimal for the application, typically around 65 ° C. However, such a solution has the major drawback of ensuring the rise in temperature, starting from ambient temperature, in far too long a time. Indeed, the user generally wants the temperature rise time to be as short as possible so that his device is operational very quickly.
On pourrait également proposer une autre solution qui n'est pas plus satisfaisante, qui consisterait à utiliser une résistance de très forte puissance, qui serait fortement sollicitée lors de la phase de montée en température, puis qui, par une régulation asservie à la température de la cire, serait alimentée de façon discontinue pendant la phase de maintien en température. Une telle solution ne fonctionne pas de façon satisfaisante puisque comme déjà dit, la cire est un matériau de forte inertie thermique.One could also propose another solution which is not more satisfactory, which would consist in using a very high power resistor, which would be highly stressed during the temperature rise phase, then which, by a regulation subject to the temperature of the wax would be fed discontinuously during the temperature maintenance phase. Such a solution does not work satisfactorily since, as already said, the wax is a material with high thermal inertia.
Par conséquent, un tel dispositif de régulation ne permettrait pas d'éviter les dépassements importants de température de la cire ou encore de la résistance chauffante, ce qui pourrait mettre en danger l'utilisateur ou provoquer la détérioration ou la destruction de la cire, voire même de l'appareil. Un troisième problème que se propose donc de résoudre l'invention est celui de pouvoir assurer un chauffage rapide de la cire et un maintien à température uniforme malgré la force d'inertie thermique de la cire.Consequently, such a regulating device would not make it possible to avoid significant overshoots of the temperature of the wax or of the heating resistance, which could endanger the user or cause the deterioration or destruction of the wax, or even even from the device. A third problem which the invention therefore proposes to solve is that of being able to ensure rapid heating of the wax and maintenance at uniform temperature despite the thermal inertia of the wax.
L'invention se propose donc de fournir un procédé de régulation du chauffage de la cire qui assure à la fois la possibilité de monter très rapidement en température, tout en permettant un maintien à une température quasi constante lorsque la cire est déjà chaude, sans provoquer de dépassement de température préjudiciable.The invention therefore proposes to provide a method for regulating the heating of the wax which ensures both the possibility of rapidly increasing the temperature, while allowing maintenance at an almost constant temperature when the wax is already hot, without causing harmful temperature overshoot.
Exposé de l'inventionStatement of the invention
L'invention concerne donc un procédé de régulation de la température d'un réservoir d'un appareil d'épilation à la cire, ledit réservoir étant équipé d'un élément chauffant électrique, et dans lequel on alimente ledit élément chauffant suivant un cycle de fonctionnement comportant des périodes durant lesquelles l'élément chauffant est connecté à une source d'énergie électrique, et des périodes durant lesquelles l'élément chauffant n'est pas alimenté, la transition d'une période à l'autre étant déterminée par la comparaison de la valeur de la température de l'élément chauffant par rapport à une consigne de température.The invention therefore relates to a method for regulating the temperature of a reservoir of a waxing appliance, said reservoir being equipped with an electric heating element, and in which said heating element is supplied according to a cycle of operation comprising periods during which the heating element is connected to a source of electrical energy, and periods during which the heating element is not supplied, the transition from one period to another being determined by comparison the value of the temperature of the heating element in relation to a temperature setpoint.
Ce procédé se caractérise en ce que la consigne de température est dynamiquement ajustée en fonction de la valeur de la durée de la précédente période durant laquelle l'élément chauffant n'était pas alimenté.This process is characterized in that the temperature setpoint is dynamically adjusted as a function of the value of the duration of the previous period during which the heating element was not supplied.
Autrement dit, le procédé de régulation conforme à l'invention se base sur la mesure d'une température qui n'est pas celle de la cire mais celle de l'élément chauffant. Le procédé conforme à l'invention permet de mesurer la quantité d'énergie qui est dissipée par l'élément chauffant, et qui est donc transmise à la cire. La quantité d'énergie transmise à la cire est dépendante de la température de l'élément chauffant que l'on mesure, et de la température de la cire. La variation de la quantité d'énergie transmise à la cire dans le temps est fonction de la quantité de la cire présente dans le réservoir. Ainsi, conformément à l'invention, en connaissant l'énergie absorbée par la cire pendant un temps donné, et son évolution dans le temps, il est possible d'estimer la température de la cire et la quantité de cire à chauffer. Ce procédé est donc un procédé de dosage de l'énergie de l'élément chauffant.In other words, the regulation method according to the invention is based on the measurement of a temperature which is not that of the wax but that of the heating element. The method according to the invention makes it possible to measure the quantity of energy which is dissipated by the heating element, and which is therefore transmitted to the wax. The amount of energy transmitted to the wax is dependent on the temperature of the heating element that is being measured, and on the temperature of the wax. The variation in the amount of energy transmitted to the wax over time is a function of the amount of wax present in the tank. Thus, according to the invention, by knowing the energy absorbed by the wax during a given time, and its evolution over time, it is possible estimate the temperature of the wax and the quantity of wax to be heated. This method is therefore a method for metering the energy of the heating element.
La mesure de la quantité d'énergie absorbée par la cire se fait en mesurant les temps de marche et d'arrêt de l'élément chauffant piloté par le dispositif de régulation fonctionnant selon le procédé conforme à l'invention.The amount of energy absorbed by the wax is measured by measuring the on and off times of the heating element controlled by the regulating device operating according to the method according to the invention.
Ainsi, lorsque les périodes durant lesquelles l'élément chauffant n'est pas alimenté ont une durée qui s'allonge, cela signifie qu'une plus faible quantité d'énergie est transmise à la cire, et que donc la cire est déjà à une température suffisante. A l'inverse, lorsque les périodes de non alimentation de l'élément chauffant sont de plus courte durée, cela signifie que la température de la cire est relativement basse, et qu'il est nécessaire que l'élément chauffant soit alimenté de façon plus soutenue pour dissiper une quantité d'énergie supérieure qui sera transmise à la cire, et qui consécutivement élèvera la température de l'élément chauffant.Thus, when the periods during which the heating element is not supplied have an elongating duration, this means that a smaller amount of energy is transmitted to the wax, and that therefore the wax is already at a sufficient temperature. Conversely, when the periods of non-supply of the heating element are shorter, this means that the temperature of the wax is relatively low, and that it is necessary for the heating element to be supplied in a more supported to dissipate a greater amount of energy which will be transmitted to the wax, and which will in turn raise the temperature of the heating element.
Autrement dit, lorsque le dispositif de régulation constate que les périodes de non alimentation réduisent de durée, il augmente la consigne de température pour que les transitions entre les périodes d'alimentation et les périodes de non alimentation interviennent moins fréquemment lorsque la température de l'élément chauffant s'est nettement élevée.In other words, when the regulating device finds that the periods of non-supply reduce duration, it increases the temperature setpoint so that the transitions between the periods of supply and the periods of non-supply occur less frequently when the temperature of the heating element has risen markedly.
Avantageusement en pratique, on peut comparer la durée de non alimentation avec un, deux ou plusieurs seuils pour déterminer respectivement deux, trois ou plusieurs seuils de consigne de température de l'élément chauffant. On peut alors avoir deux, trois ou plusieurs régimes de fonctionnement destinés à optimiser la montée et le maintien en température.Advantageously in practice, it is possible to compare the duration of non-supply with one, two or more thresholds to determine respectively two, three or more thresholds for the temperature setting of the heating element. We can then have two, three or more operating modes intended to optimize the rise and the temperature maintenance.
Avantageusement en pratique, la température de l'élément chauffant est obtenue à partir d'un capteur spécifique, notamment par une sonde ou un capteur de température du type CTN ou CTP.Advantageously in practice, the temperature of the heating element is obtained from a specific sensor, in particular by a probe or a temperature sensor of the CTN or CTP type.
Bien qu'il ne s'agisse pas de la forme préférée, l'invention couvre également les variantes dans lesquelles la mesure de température de l'élément chauffant est déterminée par la mesure de sa résistance électrique, ce qui est possible notamment grâce à l'utilisation de résistances à coefficient de température positif ou négatif.Although not the preferred form, the invention covers also the variants in which the temperature measurement of the heating element is determined by the measurement of its electrical resistance, which is possible in particular thanks to the use of resistors with positive or negative temperature coefficient.
Selon une autre caractéristique de l'invention, la consigne de température de l'élément chauffant peut également être ajustée en fonction de la comparaison de la valeur de la température de l'élément chauffant avec un seuil de température.According to another characteristic of the invention, the temperature setpoint of the heating element can also be adjusted as a function of the comparison of the value of the temperature of the heating element with a temperature threshold.
Autrement dit, lorsque la température de l'élément chauffant est en dessous d'un certain seuil, par exemple lorsqu'une nouvelle cartouche de cire froide a été insérée dans l'appareil, la consigne de température peut être fixée à une valeur haute, pour assurer une alimentation quasi continue et une très forte dissipation d'énergie, de manière à ce que la température de la cire monte très rapidement. A l'inverse, lorsque la température de l'élément chauffant a atteint une valeur supérieure à ce seuil particulier, signifiant que la cire est déjà à une température d'utilisation, la consigne de température est alors fixée à un niveau bas pour assurer une transmission d'énergie minimale suffisante pour le maintien en température.In other words, when the temperature of the heating element is below a certain threshold, for example when a new cold wax cartridge has been inserted into the appliance, the temperature setpoint can be set at a high value, to ensure an almost continuous supply and a very high energy dissipation, so that the temperature of the wax rises very quickly. Conversely, when the temperature of the heating element has reached a value above this particular threshold, signifying that the wax is already at a usage temperature, the temperature setpoint is then set at a low level to ensure a transmission of minimum energy sufficient for maintaining the temperature.
L'invention concerne également un appareil d'épilation à la cire comportant un réservoir équipé d'un élément chauffant électrique et des moyens pour alimenter ledit élément chauffant suivant un cycle de fonctionnement comportant des périodes durant lesquelles l'élément chauffant est connecté à une source d'énergie électrique et des périodes durant lesquelles l'élément chauffant n'est pas alimenté, la transition d'une période à l'autre étant effectuée par des moyens pour déterminer la comparaison de la valeur de la température de l'élément chauffant par rapport à une consigne de température, du fait qu'il comporte des moyens pour ajuster dynamiquement ladite consigne de température en fonction de la valeur de la durée de la précédente période durant laquelle l'élément chauffant n'était pas alimenté. Description sommaire des figuresThe invention also relates to a waxing apparatus comprising a reservoir equipped with an electric heating element and means for supplying said heating element according to an operating cycle comprising periods during which the heating element is connected to a source. of electric energy and periods during which the heating element is not supplied, the transition from one period to another being effected by means for determining the comparison of the value of the temperature of the heating element by with respect to a temperature setpoint, because it includes means for dynamically adjusting said temperature setpoint as a function of the value of the duration of the previous period during which the heating element was not supplied. Brief description of the figures
La manière de réaliser l'invention, ainsi que les avantages qui en découlent ressortiront bien de la description des modes de réalisation qui suivent, donnés à titre d'exemple non limitatif, à l'appui des figures annexées dans lesquelles :The manner of carrying out the invention, as well as the advantages which result therefrom, will emerge clearly from the description of the embodiments which follow, given by way of nonlimiting example, in support of the appended figures in which:
La figure 1 est un schéma général d'un appareil d'épilation à la cire.Figure 1 is a general diagram of a waxing device.
La figure 2 est un diagramme temporel montrant l'évolution de la consigne de température, et de la température de l'élément chauffant ainsi que l'état d'alimentation de l'élément chauffant au cours du temps. La figure 3 est un diagramme temporel illustrant l'évolution de la consigne de température ainsi que de la température de l'élément chauffant au cours du temps, dans le cas d'un changement de cartouche de cire.FIG. 2 is a time diagram showing the evolution of the temperature setpoint, and of the temperature of the heating element as well as the state of supply of the heating element over time. Figure 3 is a time diagram illustrating the evolution of the temperature setpoint and the temperature of the heating element over time, in the case of a change of wax cartridge.
Manière de réaliser l'invention Comme déjà dit, l'invention concerne un procédé de régulation de la température du réservoir d'un appareil d'épilation à la cire. De façon générale, un appareil d'épilation 1 à la cire est constitué, comme illustré à la figure 1 , d'un applicateur 2 qui inclut un réservoir 3 qui comporte lui-même un élément chauffant 4. De façon avantageuse, mais sans que cela soit obligatoire pour la mise en oeuvre du procédé conforme à l'invention, cet applicateur 2 peut être monté de façon amovible par rapport à un socle 5. Dans ce cas, la zone de préhension 16 peut être mise en place à l'intérieur d'un logement 8 lorsque l'applicateur 2 doit être alimenté en énergie. Ce socle 5 inclut un dispositif électronique de régulation 6, lui-même connecté au secteur par un cordon approprié 7.Manner of Carrying Out the Invention As already stated, the invention relates to a method of regulating the temperature of the reservoir of a waxing appliance. In general, a waxing device 1 consists, as illustrated in FIG. 1, of an applicator 2 which includes a reservoir 3 which itself includes a heating element 4. Advantageously, but without this is mandatory for the implementation of the method according to the invention, this applicator 2 can be removably mounted relative to a base 5. In this case, the gripping zone 16 can be placed inside a housing 8 when the applicator 2 must be supplied with energy. This base 5 includes an electronic regulation device 6, itself connected to the sector by an appropriate cord 7.
L'élément chauffant 4 peut être constitué par une résistance chauffante ou également par un élément chauffant du type CTP, ou tout autre type d'élément chauffant adapté à ce type d'utilisation. Il peut se prolonger par une langue chauffante 9 venant au contact de la cartouche de cire ou du réservoirThe heating element 4 can be constituted by a heating resistor or also by a heating element of the PTC type, or any other type of heating element suitable for this type of use. It can be extended by a heating tongue 9 coming into contact with the wax cartridge or the reservoir
3.3.
Conformément à l'invention, l'élément chauffant 4 est alimenté électriquement par le dispositif de régulation 6 de telle manière que la quantité d'énergie transmise à la cire est optimisée pour assurer une montée en température rapide et un maintien en température en régime établi.According to the invention, the heating element 4 is electrically supplied by the regulating device 6 so that the quantity of energy transmitted to the wax is optimized to ensure a rapid rise in temperature and a temperature maintenance in steady state.
Plus précisément, la température de la cire n'est pas mesurée directement par un capteur qui plongerait à l'intérieur de cette dernière. Le dispositif de régulation 6 est informé en revanche de la température de l'élément chauffant 4 lui-même. La détermination de cette température se fait grâce à la connaissance de la variation de la température de l'élément chauffant 4 mesurée par un capteur 15, en contact avec la langue chauffante 9, dont le signal est acheminé jusqu'au dispositif de régulation. Dans le cas où le capteur 15 est du type CTN ou CTP, la détermination de cette température se fait grâce à la connaissance de la variation de la valeur de sa résistance électrique en fonction de la température de l'élément chauffant 4.More precisely, the temperature of the wax is not measured directly by a sensor which would plunge inside the latter. The regulating device 6 is however informed of the temperature of the heating element 4 itself. This temperature is determined by knowing the variation in the temperature of the heating element 4 measured by a sensor 15, in contact with the heating tongue 9, the signal of which is routed to the regulation device. In the case where the sensor 15 is of the CTN or CTP type, the determination of this temperature is made by knowing the variation in the value of its electrical resistance as a function of the temperature of the heating element 4.
De façon générale, l'élément chauffant électrique 4 est alimenté ou déconnecté de la source d'énergie électrique en fonction de la comparaison de sa température par rapport à une valeur de consigne.In general, the electric heating element 4 is supplied or disconnected from the source of electric energy as a function of the comparison of its temperature with respect to a set value.
Conformément à l'invention, cette valeur de consigne est ajustée dynamiquement en fonction de la mesure de certains paramètres du cycle de fonctionnement.According to the invention, this set value is dynamically adjusted according to the measurement of certain parameters of the operating cycle.
Ainsi, comme illustré à la figure 2, cette valeur de consigne est ajustée en fonction de la quantité d'énergie dissipée par l'élément chauffant, et donc transmise à la cire. Plus précisément, la quantité d'énergie transmise est déterminée par une évaluation des différents temps d'alimentation et de non alimentation de l'élément chauffant.Thus, as illustrated in FIG. 2, this setpoint is adjusted as a function of the amount of energy dissipated by the heating element, and therefore transmitted to the wax. More precisely, the quantity of energy transmitted is determined by an evaluation of the different times of supply and non-supply of the heating element.
Ainsi, en suivant le chronogramme de la figure 2, à partir de t0, et jusqu'à ti, l'élément chauffant 4 n'est pas alimenté, et la température T mesurée par la sonde ou capteur 15, décroît (voir courbe 10). A partir de ti, la température de l'élément chauffant 4 passe en dessous de la valeur de consigne basse fixée à 70° C minorée d'une valeur d'hystérésis de 1 °C. Le dispositif de régulation 6 assure la connexion de l'élément chauffant avec la source d'énergie électrique jusqu'à t2. A cet instant, la température T de l'élément chauffant 4 ayant dépassé la valeur de la consigne basse de 70°C, l'élément chauffant 4 est alors déconnecté de sa source d'alimentation. Compte tenu de l'inertie thermique de la cire entourant l'élément chauffant 4, la température de l'élément chauffant continue à monter pendant un certain temps, pour atteindre le sommet, puis rediminuer. Lorsque la température de l'élément chauffant 4 passe en dessous de l'avant de la consigne basse minorée de la valeur d'hystérésis, à l'instant t3, l'élément chauffant électrique 4 est alors à nouveau alimenté par la source d'énergie. Sa température remonte alors jusqu'à dépasser la valeur de consigne de base. Puisque la durée de non alimentation ou le temps de réenclenchement entre deux cycles d'alimentation t0ff (soit t3 - 12) est supérieure à un seuil haut, fixé à 120 secondes, la consigne de température de l'élément chauffant reste à son niveau bas de 70°C. A partir de , la température de l'élément chauffant suit une variation analogue à celle ayant suivie t2. Ceci correspond au fonctionnement au repos avec l'élément chauffant qui régule à un palier de température basse correspondant à la dose d'énergie juste nécessaire au maintien en température d'une cartouche de cire déjà chaude.Thus, by following the timing diagram of FIG. 2, from t 0 , and up to ti, the heating element 4 is not supplied, and the temperature T measured by the probe or sensor 15, decreases (see curve 10). From ti, the temperature of the heating element 4 drops below the low set value set at 70 ° C minus a hysteresis value of 1 ° C. The regulating device 6 ensures the connection of the heating element with the source of electrical energy up to t 2 . At this instant, the temperature T of the heating element 4 having exceeded the value of the low set point of 70 ° C., the heating element 4 is then disconnected from its power source. Taking into account the thermal inertia of the wax surrounding the heating element 4, the temperature of the heating element continues to rise for a certain time, to reach the summit, then to decrease. When the temperature of the heating element 4 drops below the front of the low setpoint minus the hysteresis value, at time t 3 , the electric heating element 4 is then again supplied by the source d 'energy. Its temperature then rises until it exceeds the basic setpoint. Since the duration of non-supply or the reset time between two supply cycles t 0ff ( i.e. t 3 - 1 2 ) is greater than a high threshold, fixed at 120 seconds, the temperature setting of the heating element remains at its low level of 70 ° C. From, the temperature of the heating element follows a variation similar to that having followed t 2 . This corresponds to the operation at rest with the heating element which regulates at a low temperature level corresponding to the dose of energy just necessary to maintain the temperature of an already hot wax cartridge.
Après introduction d'une cartouche de cire refroidie lors de l'utilisation, les cycles de marche et d'arrêt se modifient. Les temps de marche s'allongent, ceux d'arrêt diminuent. Suivant l'importance de cette modification et la température de l'ensemble chauffant au moment de la modification, le système électronique décide de conserver le même palier de température ou de passer à des paliers plus élevés pendant un temps prédéterminé afin de délivrer une dose d'énergie supplémentaire pour amener la cire dans les plus brefs délais à la bonne température. Ainsi, à l'instant t5, lorsque la température repasse en dessous de la valeur de consigne basse de 70°C, l'élément chauffant est alors alimenté. La durée de non alimentation t0ff, mesurée entre t5 et étant située entre deux seuils de durée fixés à 110 et 120 secondes, la valeur de la consigne de température est alors ajustée à une valeur moyenne, typiquement égale à 98°C (voir courbe 11 ). Il s'ensuit que l'élément chauffant est alimenté pendant une durée plus importante que les durées précédentes, pour que la température de l'élément chauffant atteigne ladite consigne moyenne de 98°C, ce qui intervient en t6. L'élément chauffant est alors déconnecté de la source d'alimentation et la température du fait de l'inertie thermique de la cire monte jusqu'à une valeur maximale puis redescend. A l'instant t7, la température est descendue en dessous de la valeur de consigne basse minorée de la valeur d'hystérésis et l'élément chauffant est alors ré-alimenté.After the introduction of a cooled wax cartridge during use, the on and off cycles change. The running times get longer, those of the stops decrease. Depending on the importance of this modification and the temperature of the heating assembly at the time of the modification, the electronic system decides to keep the same temperature level or to move to higher levels for a predetermined time in order to deliver a dose of additional energy to bring the wax to the right temperature as quickly as possible. Thus, at time t 5 , when the temperature falls below the low setpoint of 70 ° C, the heating element is then supplied. The duration of non-supply t 0 ff, measured between t 5 and being situated between two duration thresholds fixed at 110 and 120 seconds, the value of the temperature setpoint is then adjusted to an average value, typically equal to 98 ° C. ( see curve 11). It follows that the heating element is supplied for a longer duration than the preceding durations, so that the temperature of the heating element reaches said average set point of 98 ° C., which occurs at t 6 . The heating element is then disconnected from the source power supply and the temperature due to the thermal inertia of the wax rises to a maximum value then decreases. At time t 7 , the temperature has dropped below the low setpoint minus the hysteresis value and the heating element is then re-supplied.
L'élément chauffant électrique 4 étant ré-alimenté, la température après avoir atteint son minimum, remonte pour dépasser, à l'instant te, la consigne basse de 70°C. Entre t8 et t-io, la température suit le même cycle qu'entre t2 et t . Entre tio et tu, l'élément chauffant n'étant plus alimenté, la température atteint son maximum pour redescendre en dessous de la consigne basse minorée de la valeur d'hystérésis en tu. Le système revient donc au palier lors de régulation pour le maintien en température de cette nouvelle cartouche.The electric heating element 4 being re-supplied, the temperature after having reached its minimum, rises to exceed, at the instant te, the low set point of 70 ° C. Between t 8 and t-io, the temperature follows the same cycle as between t 2 and t. Between tio and tu, the heating element being no longer supplied, the temperature reaches its maximum to fall below the low setpoint minus the hysteresis value in tu. The system therefore returns to the level during regulation for maintaining the temperature of this new cartridge.
Du fait d'une utilisation plus intensive, quand la cartouche reste plus longtemps en dehors du socle, la température de l'élément chauffant est redescendue plus rapidement que lors du cycle précédent. La durée t0ff correspondant à tιo - tu durant laquelle l'élément chauffant n'a pas été alimenté est inférieure au second seuil de durée, fixé à 110 secondes.Due to more intensive use, when the cartridge remains outside the base for a longer time, the temperature of the heating element has dropped faster than during the previous cycle. The duration t 0ff corresponding to tιo - tu during which the heating element has not been supplied is less than the second duration threshold, fixed at 110 seconds.
Par conséquent, à partir de tu la consigne de température est fixée à sa valeur haute choisie typiquement à 103°C. L'élément chauffant est alors alimenté pendant une durée plus importante, jusqu'à tι2. Par la suite, lorsque l'élément chauffant n'est plus alimenté, la température suit une décroissance sensiblement analogue à celle observée à partir de t6.Consequently, from you the temperature setpoint is fixed at its high value chosen typically at 103 ° C. The heating element is then supplied for a longer period, up to tι 2 . Thereafter, when the heating element is no longer supplied, the temperature follows a decrease substantially similar to that observed from t 6 .
La quantité d'énergie fournie à l'élément chauffant est donc effectivement ajustée pour obtenir un maintien en température aussi constant que possible, et une montée aussi rapide que possible, compte tenu des capacités dissipatrices de l'élément chauffant 4.The amount of energy supplied to the heating element is therefore effectively adjusted to obtain as constant a temperature maintenance as possible, and a rise as rapid as possible, taking into account the dissipative capacities of the heating element 4.
La figure 3 illustre un autre aspect de l'invention particulièrement utile pour les montées en température et le changement des cartouches de cire.FIG. 3 illustrates another aspect of the invention which is particularly useful for raising the temperature and changing the wax cartridges.
Ainsi, lorsque la température de l'élément chauffant est supérieure à un seuil de température fixé sensiblement autour de 50°C, la consigne de température (courbe 13) est maintenue à une valeur basse, correspondant à 70°C. Ainsi, entre les instants t20 et t2ι, l'élément chauffant est alimenté de telle manière que sa température (courbe 12) augmente pour passer au-dessus de cette valeur de consigne basse de 70°C. Par la suite, entre t2ι et t22, puis jusqu'à t25, la température et l'alimentation suit un cycle de fonctionnement déjà décrit pour la figure précédente dans laquelle la valeur de consigne est maintenue à un niveau bas puisque les temps de non alimentation toff, correspondant respectivement à t22 - t2ι, et à t24 - 123, sont supérieurs au seuil de durée de 120 secondes.So when the temperature of the heating element is higher than one temperature threshold fixed substantially around 50 ° C, the temperature setpoint (curve 13) is kept at a low value, corresponding to 70 ° C. Thus, between instants t 20 and t 2 ι, the heating element is supplied in such a way that its temperature (curve 12) increases in order to pass above this low set point value of 70 ° C. Thereafter, between t 2 ι and t 22 , then up to t 25 , the temperature and the supply follows an operating cycle already described for the previous figure in which the set value is maintained at a low level since the non-supply time t off , corresponding respectively to t 22 - t 2 ι, and to t 24 - 1 23 , are greater than the duration threshold of 120 seconds.
Par la suite, à partir de l'instant t25, on procède à un changement de la cartouche de cire, expliquant la non continuité de la courbe reflétant la variation de la température de l'élément chauffant 4. A l'instant t2e, la cartouche étant neuve ou froide, sa température est basse, voisine ou en-dessous de la température ambiante. Il s'ensuit que le dispositif de régulation 6 qui détecte cette valeur de température détermine qu'elle est inférieure au seuil de température de 50°C précité. En conséquence, la valeur de consigne de température demeure fixée à une valeur haute correspondant à une consigne de démarrage, voisine de 113°C.Thereafter, from time t 25 , the wax cartridge is changed, explaining the non-continuity of the curve reflecting the variation in the temperature of the heating element 4. At time t 2 e, the cartridge being new or cold, its temperature is low, close to or below ambient temperature. It follows that the regulating device 6 which detects this temperature value determines that it is below the aforementioned temperature threshold of 50 ° C. Consequently, the temperature setpoint remains fixed at a high value corresponding to a start-up setpoint, close to 113 ° C.
En conséquence, l'élément chauffant est alimenté pendant une durée relativement importante, entre t26 et t27, jusqu'à ce que sa température atteigne 113°C. A partir de ce moment là, et après t27, l'élément chauffant n'est plus alimenté et sa température après une légère poursuite de sa montée redescend jusqu'à descendre, en t28 en dessous de la consigne basse minorée d'un hystérésis. Le cycle d'alimentation est ensuite repris sur la base d'une consigne plus basse. La montée en température a été assurée de façon très rapide, par une alimentation continue entre t26 et t27.Consequently, the heating element is supplied for a relatively long time, between t 26 and t 27 , until its temperature reaches 113 ° C. From this moment there, and after t 27 , the heating element is no longer supplied and its temperature after a slight continuation of its ascent decreases until it descends, in t 28 below the low setpoint minus one hysteresis. The feeding cycle is then resumed on the basis of a lower setpoint. The temperature rise was ensured very quickly, by a continuous supply between t 26 and t 27 .
Bien évidemment, toutes les valeurs données ci-avant sont des exemples particuliers, et peuvent être adaptés en fonction de différents paramètres tels que la puissance de l'élément chauffant électrique, le volume initial du réservoir de cire, son taux de remplissage initial, la formule chimique de la cire, la température optimale d'utilisation de la cire, la surface d'échange l'élément chauffant électrique et la cire, la température initiale de la cire.Obviously, all the values given above are specific examples, and can be adapted according to different parameters such as the power of the electric heating element, the initial volume of the wax tank, its initial filling rate, the chemical formula of the wax, the optimum temperature for using the wax, the exchange surface of the electric heating element and the wax, the initial temperature of the wax.
D'autres variantes plus perfectionnées, mais non représentées, peuvent être envisagées. Ainsi, il est possible de modifier les valeurs des paliers et les seuils de durée d'alimentation en fonction de la tension d'alimentation de l'élément chauffant. Il est ainsi possible de rendre l'appareil compatible avec plusieurs valeurs de tensions nominales du secteur. On peut également prévoir que la tension d'alimentation de l'élément chauffant peut être modulée par l'utilisateur.Other more sophisticated variants, but not shown, can be envisaged. Thus, it is possible to modify the values of the stages and the supply duration thresholds as a function of the supply voltage of the heating element. It is thus possible to make the device compatible with several nominal mains voltage values. It can also be provided that the supply voltage of the heating element can be modulated by the user.
On peut également prévoir des moyens de détection du type de cartouche par le dispositif de régulation. Dans ce cas, des cartouches de taille différente ou contenant des cires à températures de fusion différentes peuvent être détectées par le dispositif électronique qui ajuste alors les paramètres (seuils de durée d'alimentation, paliers de température) en fonction de la cartouche détectée.It is also possible to provide means for detecting the type of cartridge by the regulating device. In this case, cartridges of different size or containing waxes with different melting temperatures can be detected by the electronic device which then adjusts the parameters (supply duration thresholds, temperature steps) according to the cartridge detected.
Il ressort de ce qui précède que le procédé de régulation de la température conforme à l'invention présente de multiples avantages et notamment :It appears from the above that the temperature control method according to the invention has multiple advantages and in particular:
• une montée en température extrêmement rapide, optimisée en fonction des propriétés de l'élément chauffant utilisé ;• an extremely rapid rise in temperature, optimized according to the properties of the heating element used;
• une mesure de la température faite directement sur l'élément chauffant, sans nécessiter de connaître la température de la cire proprement dite ;• a temperature measurement made directly on the heating element, without needing to know the temperature of the wax itself;
• un dosage de la quantité d'énergie nécessaire pour assurer la montée en température et le maintien de la température de la cire ,• a dosage of the quantity of energy necessary to ensure the rise in temperature and the maintenance of the temperature of the wax,
• l'absence de capteur de température plongé dans la cire, et donc une simplification des appareils et une réduction de leur coût ; «une adaptation automatique à la quantité de cire présente dans le réservoir ;• the absence of a temperature sensor immersed in the wax, and therefore a simplification of the devices and a reduction in their cost; “An automatic adaptation to the quantity of wax present in the tank;
• la possibilité de gérer des changements de cartouche, ayant des températures très différentes tout en conservant la rapidité de montée en température ; • l'adaptation à différentes tailles de cartouche (volume de cire) et différents types de cire à chauffer. • the possibility of managing cartridge changes, having very different temperatures while maintaining the speed of temperature rise; • adaptation to different cartridge sizes (volume of wax) and different types of wax to be heated.

Claims

REVENDICATIONS
1/ Procédé de régulation de la température d'un réservoir d'un appareil d'épilation (1 ) à cire, ledit réservoir (3) étant équipé d'un élément chauffant électrique (4), et dans lequel on alimente ledit élément chauffant suivant un cycle de fonctionnement comportant des périodes durant lesquelles l'élément chauffant est connecté à une source d'énergie électrique, et des périodes durant lesquelles l'élément chauffant n'est pas alimenté, la transition d'une période à l'autre étant déterminée par la comparaison de la valeur de la température de l'élément chauffant (4) par rapport à une consigne de température, caractérisé en ce que ladite consigne de température est dynamiquement ajustée en fonction de la valeur de la durée (t0fτ) de la précédente période durant laquelle l'élément chauffant (4) n'était pas alimenté.1 / Method for regulating the temperature of a reservoir of a waxing appliance (1), said reservoir (3) being equipped with an electric heating element (4), and in which said heating element is supplied following an operating cycle comprising periods during which the heating element is connected to a source of electrical energy, and periods during which the heating element is not supplied, the transition from one period to the other being determined by comparing the value of the temperature of the heating element (4) with respect to a temperature setpoint, characterized in that said temperature setpoint is dynamically adjusted as a function of the value of the duration (t 0f τ) from the previous period during which the heating element (4) was not supplied.
2/ Procédé selon la revendication 1 , caractérisé en ce que la consigne de température est fonction de la comparaison de la durée (t0ff) de la période de non alimentation avec au moins un seuil, de sorte que ladite consigne adopte au moins deux valeurs.2 / A method according to claim 1, characterized in that the temperature setpoint is a function of the comparison of the duration (t 0ff ) of the non-supply period with at least one threshold, so that said setpoint adopts at least two values .
3/ Procédé selon la revendication 1 , caractérisé en ce que la consigne de température est également ajustée en fonction de la comparaison de la valeur de la température de l'élément chauffant (4) avec un seuil de température.3 / A method according to claim 1, characterized in that the temperature setpoint is also adjusted as a function of the comparison of the value of the temperature of the heating element (4) with a temperature threshold.
4/ Procédé selon la revendication 1 , caractérisé en ce que la température de l'élément chauffant (4) est déterminée par la mesure de sa résistance électrique.4 / A method according to claim 1, characterized in that the temperature of the heating element (4) is determined by measuring its electrical resistance.
5/ Appareil d'épilation à la cire comportant un réservoir (3) équipé d'un élément chauffant électrique (4) et des moyens pour alimenter ledit élément chauffant suivant un cycle de fonctionnement comportant des périodes durant lesquelles l'élément chauffant est connecté à une source d'énergie électrique et des périodes durant lesquelles l'élément chauffant n'est pas alimenté, la transition d'une période à l'autre étant effectuée par des moyens pour déterminer la comparaison de la valeur de la température de l'élément chauffant (4) par rapport à une consigne de température, caractérisé en ce qu'il comporte des moyens pour ajuster dynamiquement ladite consigne de température en fonction de la valeur de la durée (t0ff) de la précédente période durant laquelle l'élément chauffant (4) n'était pas alimenté. 5 / A waxing appliance comprising a reservoir (3) equipped with an electric heating element (4) and means for supplying said heating element according to an operating cycle comprising periods during which the heating element is connected to a source of electrical energy and periods during which the heating element is not supplied, the transition from one period to another being effected by means for determining the comparison of the value of the temperature of the element heating (4) by relative to a temperature setpoint, characterized in that it comprises means for dynamically adjusting said temperature setpoint as a function of the value of the duration (t 0ff ) of the previous period during which the heating element (4) does not was not fed.
PCT/FR2001/001834 2000-06-20 2001-06-13 Temperature control method for a depilatory apparatus wax reservoir WO2001098852A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67642/01A AU6764201A (en) 2000-06-20 2001-06-13 Temperature control method for a depilatory apparatus wax reservoir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0007876A FR2810217B1 (en) 2000-06-20 2000-06-20 METHOD FOR REGULATING THE TEMPERATURE OF THE TANK OF AN WAX REMOVAL APPARATUS
FR00/07876 2000-06-20

Publications (1)

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WO2001098852A1 true WO2001098852A1 (en) 2001-12-27

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FR (1) FR2810217B1 (en)
WO (1) WO2001098852A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2411340A (en) * 2004-02-27 2005-08-31 Jai Indar Ragbir Heater for depilatory wax
CN100398088C (en) * 2005-05-25 2008-07-02 上海泰尔精蜡有限公司 Wax used for dehairing from human body, its prepn. method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4303688A1 (en) * 2022-07-08 2024-01-10 Koninklijke Philips N.V. Controlling operation of a heater of a hair styling device

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE4104677A1 (en) * 1991-02-15 1992-08-20 Bauknecht Hausgeraete Temperature control method for ceramic hotplate - using proximity control and progressive power reduction to approach set temperature
US5673568A (en) * 1994-06-03 1997-10-07 Kabushiki Kaisha Toshiba Apparatus and method for controlling an air conditioner
WO1998056275A1 (en) * 1997-06-12 1998-12-17 Seb S.A. Thermofusible substance manual dispenser comprising a heating grid
EP0935938A1 (en) * 1998-02-13 1999-08-18 Seb S.A. Electric espresso coffeemachine with thermal regulation mean

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104677A1 (en) * 1991-02-15 1992-08-20 Bauknecht Hausgeraete Temperature control method for ceramic hotplate - using proximity control and progressive power reduction to approach set temperature
US5673568A (en) * 1994-06-03 1997-10-07 Kabushiki Kaisha Toshiba Apparatus and method for controlling an air conditioner
WO1998056275A1 (en) * 1997-06-12 1998-12-17 Seb S.A. Thermofusible substance manual dispenser comprising a heating grid
EP0935938A1 (en) * 1998-02-13 1999-08-18 Seb S.A. Electric espresso coffeemachine with thermal regulation mean

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2411340A (en) * 2004-02-27 2005-08-31 Jai Indar Ragbir Heater for depilatory wax
GB2411340B (en) * 2004-02-27 2009-03-04 Jai Indar Ragbir Improved wax heater
CN100398088C (en) * 2005-05-25 2008-07-02 上海泰尔精蜡有限公司 Wax used for dehairing from human body, its prepn. method

Also Published As

Publication number Publication date
FR2810217B1 (en) 2003-01-31
AU6764201A (en) 2002-01-02
FR2810217A1 (en) 2001-12-21

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