EP3502583A1 - Boiler for a household appliance - Google Patents

Boiler for a household appliance Download PDF

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Publication number
EP3502583A1
EP3502583A1 EP18211137.7A EP18211137A EP3502583A1 EP 3502583 A1 EP3502583 A1 EP 3502583A1 EP 18211137 A EP18211137 A EP 18211137A EP 3502583 A1 EP3502583 A1 EP 3502583A1
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EP
European Patent Office
Prior art keywords
boiler
heating
heat exchange
interface piece
exchange surface
Prior art date
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Granted
Application number
EP18211137.7A
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German (de)
French (fr)
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EP3502583B1 (en
Inventor
Frédéric COLLET
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SEB SA
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SEB SA
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Publication of EP3502583A1 publication Critical patent/EP3502583A1/en
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Publication of EP3502583B1 publication Critical patent/EP3502583B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/12—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water supplied to the iron from an external source

Definitions

  • the present invention relates to a boiler for an appliance, and more particularly for an ironing appliance.
  • the flexible interface piece has first and second contact surfaces which are flat and opposite to each other, the first contact surface being in contact with the heating surface and the second contact surface being in contact with each other; with the heat exchange surface.
  • a non-negligible portion of the flexible interface piece may not be in contact with the heating surface and the surface heat exchange, or at least a substantial portion of the flexible interface piece may not be compressed.
  • the present invention aims to remedy all or part of these disadvantages.
  • the technical problem underlying the invention is therefore to provide a boiler for household appliances that is simple and economical structure, while allowing improved heat transfer between the heating device and the boiler steam generation tank.
  • protuberances on the heat exchange surface and / or on the heating surface substantially increases the contact surface between the interface piece and the steam generation vessel and / or the heating device and also decreases the distance separating the heating device and the steam generating tank at the level of the protuberances, which makes it possible to increase significantly the heat transfer between the device of heater and the steam generation vessel.
  • the configuration of the protuberances makes it possible, in any weakly compressed zones of the interface piece, to ensure, despite everything, at least partial penetration of the protuberances in the thickness of the interface piece, and therefore of in these weakly compressed areas of the interface piece, ensuring a thermal contact between the interface piece and the surface bearing the protuberances. Such contact, even partial, makes it possible to further increase the heat transfer between the heating device and the steam generation vessel.
  • the presence of the protuberances makes it possible to ensure, even in areas of the interface piece where a clearance exists between the interface piece and the surface bearing the protuberances, a heat transfer between the heating device and the bowl. generating steam at least via the protuberances.
  • the boiler according to the present invention has a much higher energy efficiency than boilers of the prior art.
  • the boiler may further have one or more of the following features, taken alone or in combination.
  • the geometry of the protuberances is determined so as to limit the penetration force of the protuberances in the interface piece and to maximize the contact surface between the interface piece and the bearing surface. the protuberances.
  • the interface piece comprises a first surface which is substantially flat and which is in contact with the heating surface, and a second surface which is opposite to the first surface, the second surface being substantially flat and in contact with the heat exchange surface.
  • each protuberance exerts a bearing force against the first surface or the second surface of the interface piece.
  • the protuberances provided on the heat exchange surface or the heating surface define a developed contact surface which is greater than a planar reference surface having dimensions identical to the heat exchange surface or the heating surface and which is devoid of protuberance.
  • the heat exchange surface extends substantially parallel to the heating surface.
  • the protuberances are regularly distributed over the heat exchange surface and / or on the heating surface.
  • each protuberance has a height of between 0.1 and 1.5 mm, and preferably between 0.2 and 0.5 mm.
  • each protuberance has a width of between 1 and 4 mm.
  • each protuberance has a pyramidal shape or has a generally domed shape.
  • the pyramidal shape of the protuberances makes it possible, for an equal compression force, to increase the rate of deformation by compression of the interface piece.
  • the interface piece is graphite, preferably expanded graphite.
  • the interface piece has a thickness between 0.2 and 3 mm, and for example about 0.5 mm.
  • the interface piece has a thermal conductivity of between 0.5 and 80 Wm -1 .K -1 , and preferably between 1 and 15 Wm -1 .K -1 , in a direction perpendicular to an extension plane of the interface piece.
  • the first surface is substantially parallel to the second surface.
  • the interface piece has a disk shape.
  • the heating device comprises a heating body, for example aluminum alloy, in which is integrated the heating element.
  • the heating surface is advantageously provided on the heating body.
  • the heating element is an electric heating resistor.
  • the heating element has a power of at least 1200 W.
  • the steam generation vessel defines a vaporization chamber.
  • the steam generation vessel comprises a lower half-tank comprising the bottom, and an upper half-tank attached to the lower half-tank.
  • the vaporization chamber is delimited by the lower half-tank and the upper half-tank.
  • the lower half-tank and the upper half-tank are each made of stainless steel.
  • the steam generating vessel comprises a water inlet opening for introducing water into the vaporization chamber, and a steam outlet opening for extracting the steam. formed in the vaporization chamber.
  • the water inlet opening may for example be provided on the lower half-shell, and the steam outlet opening may for example be provided on the upper half-shell.
  • the steam generating vessel may comprise a discharge valve fluidly connected to the steam outlet opening and configured to allow extraction of the vapor formed in the vaporization chamber only when the pressure in the vaporization chamber exceeds a predetermined threshold.
  • the steam generation vessel is fixed to the heating device by screwing so as to compress the part interface between the heating surface and the heat exchange surface.
  • the steam generation vessel comprises threaded fastening elements projecting from the heat exchange surface
  • the heating device comprises fixing holes each intended for the passage of an element. respective threaded fastening of the steam generation vessel.
  • the threaded fastening elements are immobilized with respect to the heating device by means of fastening nuts screwed onto the threaded fasteners.
  • the interface piece has passage orifices for the passage of the threaded fasteners belonging to the steam generating vessel.
  • the heating body of the heating device has a general disc shape.
  • the bottom of the steam generation vessel partially delimits the vaporization chamber.
  • the present invention further relates to an appliance comprising a boiler according to the invention.
  • the appliance is an ironing appliance, such as a steam generator or an iron in which the boiler is integrated.
  • the Figures 1 to 5 represent a boiler 2 for an ironing appliance, such as a steam generator.
  • the boiler 2 comprises a heating device 3 comprising a heating body 4 provided with a heating surface 5.
  • the heating body 4 may for example be made of aluminum alloy, and have a general shape of disc.
  • the heating device 3 further comprises a heating element 6 integrated in the heating body 4 and configured to heat the heating surface 5.
  • the heating body 4 may for example be formed by overmolding on the heating element 6.
  • the heating element 6 is advantageously an electric heating resistor, and may for example have a power of at least 1200 W.
  • the boiler 2 also comprises a steam generation vessel 7 fixed to the heating device 3, for example by screwing.
  • the steam generation vessel 7 comprises a lower half-tank 7.1 and an upper half-tank 7.2 fixed to one another and defining a vaporization chamber.
  • the lower half-bowl 7.1 and the upper half-bowl 7.2 are each advantageously made of stainless steel.
  • the lower half-bowl 7.1 more particularly comprises a bottom 9 which partially delimits the vaporization chamber, and which is provided with a heat exchange surface 11 which is turned towards the heating surface 5.
  • the heat exchange surface 11 extends substantially parallel to the heating surface 5.
  • the steam generation vessel 7 comprises threaded fastening elements 12, such as studs, protruding perpendicularly from the heat exchange surface 11, and the heating device 3 comprises fixing holes 13 each for the passage of a respective threaded fastener 12 of the steam generating vessel 7.
  • the threaded fasteners 12 are preferably immobilized with respect to the heater 3 by means of fastening nuts
  • the threaded fasteners 12 may for example be fastened to the lower half-bowl 7.1 by welding, and for example by electric discharge welding.
  • the steam generation vessel 7 also comprises a water inlet opening (not visible in the figures) allowing water to be introduced into the vaporization chamber, and a steam outlet opening (not visible in the figures). allowing an extraction of the steam formed in the vaporization chamber.
  • the water inlet opening may for example be provided on the lower half-shell 7.1, and the steam outlet opening may for example be provided on the upper half-shell 7.2.
  • the steam generating vessel 7 further includes an inlet connector 17 which is connected to the water inlet opening, and a discharge connector 18 which is connected to the steam outlet opening.
  • the discharge connection 18 may comprise a discharge valve fluidly connected to the steam outlet opening and configured to allow extraction of the vapor formed in the vaporization chamber only when the pressure in the vaporization chamber exceeds a predetermined threshold.
  • the boiler 2 further comprises a flexible interface piece 19 disposed between the heating surface 5 and the heat exchange surface 11.
  • the interface piece 19 has a disc shape, and has a first surface 21 which is substantially flat and which is in contact with the heating surface 5, and a second surface 22 opposite the first surface 21.
  • the second surface 22 is also substantially flat and is in contact with the heat exchange surface 11.
  • the steam generating vessel 7 is attached to the heater 3 so that the interface piece 19 is compressed, i.e., sandwiched, between the heating surface 5 and the heater.
  • Heat exchange surface 11 the interface piece 19 is expanded graphite, and has a thickness of between 0.2 and 1 mm, for example about 0.5 mm.
  • the interface piece 19 is thermally conductive, and advantageously has a thermal conductivity of the order of 4 to 6 Wm -1 .K -1 in a direction perpendicular to the extension plane of the interface piece 19.
  • the interface piece 19 also has through-holes 23 for the passage of the threaded fastening elements 12 belonging to the steam generation vessel 7.
  • Each passage orifice 23 more particularly has a diameter greater than the diameter of the element of the invention. respective threaded fastener 12.
  • the heating surface 5 has protuberances 24 configured to at least partially compress the interface part 19 and to penetrate into the thickness of the interface part 19.
  • the protuberances 24 are evenly distributed over the heating surface 5, and are each configured to exert a pressing force against the first surface 21 of the interface piece 19.
  • each protuberance 24 has a general dome shape.
  • Each protrusion 24 may for example have a height of between 0.2 and 1 mm, and preferably between 0.2 and 0.5 mm, and may for example have a width of between 1 and 2 mm.
  • the protuberances 24 provided on the heating surface 5 define a developed contact surface which is greater than a reference surface having dimensions identical to the heating surface 5 and which is devoid of protuberance.
  • FIGS. 6 to 9 represent a boiler 2 according to a second embodiment of the invention which differs from the first embodiment essentially in that each protuberance 24 provided on the heating surface has a pyramidal shape.
  • the vaporization chamber 8 of the steam generation vessel 7 of the boiler according to the second embodiment of the invention is more particularly visible on the figure 7 .
  • the present invention is not limited to the described and illustrated embodiments which have been given only as examples. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.
  • the protuberances 24 could be provided on the heat exchange surface 11, or protuberances could be provided on the one hand on the heat exchange surface 11 and on the other hand on the heating surface 5.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cookers (AREA)
  • Irons (AREA)

Abstract

La chaudière (2) comprend un dispositif de chauffe (3) comprenant une surface de chauffage (5), et un élément chauffant configuré pour chauffer la surface de chauffage (5) ; une cuve de génération de vapeur (7) comprenant un fond (9) pourvu d'une surface d'échange thermique, la cuve de génération de vapeur (7) étant fixée au dispositif de chauffe (3); et une pièce d'interface (19) disposée et comprimée entre la surface de chauffage (5) et la surface d'échange thermique, la pièce d'interface (19) étant thermiquement conductrice et étant destinée à favoriser un transfert thermique entre le dispositif de chauffe (3) et la cuve de génération de vapeur (7). La surface d'échange thermique et/ou la surface de chauffage (5) présente des protubérances (24) comprimant au moins partiellement la pièce d'interface (19) et pénétrant dans l'épaisseur de la pièce d'interface (19).The boiler (2) comprises a heating device (3) comprising a heating surface (5), and a heating element configured to heat the heating surface (5); a steam generating vessel (7) comprising a bottom (9) provided with a heat exchange surface, the steam generating vessel (7) being attached to the heater (3); and an interface piece (19) disposed and compressed between the heating surface (5) and the heat exchange surface, the interface piece (19) being thermally conductive and being intended to promote thermal transfer between the device heater (3) and the steam generation vessel (7). The heat exchange surface and / or the heating surface (5) has protuberances (24) at least partially compressing the interface piece (19) and penetrating into the thickness of the interface piece (19).

Description

La présente invention concerne une chaudière pour un appareil électroménager, et plus particulièrement pour un appareil de repassage.The present invention relates to a boiler for an appliance, and more particularly for an ironing appliance.

Le document CN106400438 divulgue une chaudière pour appareil de repassage, comprenant :

  • un dispositif de chauffe comprenant une surface de chauffage qui est sensiblement plane, et un élément chauffant configuré pour chauffer la surface de chauffage,
  • une cuve de génération de vapeur délimitant une chambre de vaporisation et comprenant un fond pourvu d'une surface d'échange thermique qui est sensiblement plane et qui est sensiblement parallèle à la surface de chauffage, et
  • une pièce d'interface souple disposée entre la surface de chauffage et la surface d'échange thermique et destinée à favoriser un transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur, la pièce d'interface souple étant thermiquement conductrice et la cuve de génération de vapeur étant fixée au dispositif de chauffe de telle sorte que la pièce d'interface souple soit comprimée entre la surface de chauffage et la surface d'échange thermique.
The document CN106400438 discloses a boiler for an ironing apparatus, comprising:
  • a heating device comprising a heating surface which is substantially flat, and a heating element configured to heat the heating surface,
  • a steam generating vessel defining a vaporization chamber and having a bottom having a heat exchange surface which is substantially planar and is substantially parallel to the heating surface, and
  • a flexible interface piece disposed between the heating surface and the heat exchange surface and intended to promote heat transfer between the heating device and the steam generation tank, the flexible interface piece being thermally conductive and the steam generation vessel being attached to the heater such that the flexible interface member is compressed between the heating surface and the heat exchange surface.

Selon le document CN106400438 , la pièce d'interface souple comporte des première et deuxième surfaces de contact qui sont planes et opposées l'une à l'autre, la première surface de contact étant en contact avec la surface de chauffage et la deuxième surface de contact étant en contact avec la surface d'échange thermique.According to the document CN106400438 the flexible interface piece has first and second contact surfaces which are flat and opposite to each other, the first contact surface being in contact with the heating surface and the second contact surface being in contact with each other; with the heat exchange surface.

Cependant, compte tenu des tolérances de fabrication de la cuve de génération de vapeur et du dispositif de chauffe, et plus particulièrement des tolérances de planéité de la surface de chauffage et de la surface d'échange thermique, et du fait que la cuve de génération de vapeur et le dispositif de chauffe sont assemblés par compression, une portion non négligeable de la pièce d'interface souple peut ne pas être en contact avec la surface de chauffage et la surface d'échange thermique, ou du moins une portion non négligeable de la pièce d'interface souple peut ne pas être comprimée.However, given the manufacturing tolerances of the steam generation vessel and the heating device, and more particularly the flatness tolerances of the heating surface and the heat exchange surface, and the fact that the generation vessel of steam and the heating device are assembled by compression, a non-negligible portion of the flexible interface piece may not be in contact with the heating surface and the surface heat exchange, or at least a substantial portion of the flexible interface piece may not be compressed.

Or, un tel défaut de contact et/ou de compression limite le transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur, et nuit donc au rendement de la chaudière.However, such a lack of contact and / or compression limits the heat transfer between the heating device and the steam generation vessel, and thus adversely affects the efficiency of the boiler.

La présente invention vise à remédier à tout ou partie de ces inconvénients.The present invention aims to remedy all or part of these disadvantages.

Le problème technique à la base de l'invention consiste donc à fournir une chaudière pour appareil électroménager qui soit de structure simple et économique, tout en permettant un transfert thermique amélioré entre le dispositif de chauffe et la cuve de génération de vapeur de la chaudière.The technical problem underlying the invention is therefore to provide a boiler for household appliances that is simple and economical structure, while allowing improved heat transfer between the heating device and the boiler steam generation tank.

A cet effet, la présente invention concerne une chaudière pour appareil électroménager, comprenant :

  • un dispositif de chauffe comprenant une surface de chauffage, et un élément chauffant configuré pour chauffer la surface de chauffage,
  • une cuve de génération de vapeur comprenant un fond pourvu d'une surface d'échange thermique, la cuve de génération de vapeur étant fixée au dispositif de chauffe, et
  • une pièce d'interface disposée entre la surface de chauffage et la surface d'échange thermique et destinée à favoriser un transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur, la pièce d'interface étant thermiquement conductrice et étant comprimée entre la surface de chauffage et la surface d'échange thermique,
caractérisée en ce que la surface d'échange thermique et/ou la surface de chauffage présente des protubérances comprimant au moins partiellement la pièce d'interface et pénétrant dans l'épaisseur de la pièce d'interface.For this purpose, the present invention relates to a boiler for household appliances, comprising:
  • a heating device comprising a heating surface, and a heating element configured to heat the heating surface,
  • a steam generating vessel comprising a bottom provided with a heat exchange surface, the steam generating vessel being attached to the heater, and
  • an interface piece disposed between the heating surface and the heat exchange surface and intended to promote heat transfer between the heating device and the steam generation tank, the interface piece being thermally conductive and being compressed between the heating surface and the heat exchange surface,
characterized in that the heat exchange surface and / or the heating surface has protrusions at least partially compressing the interface piece and penetrating into the thickness of the interface piece.

La présence de telles protubérances sur la surface d'échange thermique et/ou sur la surface de chauffage augmente sensiblement la surface de contact entre la pièce d'interface et la cuve de génération de vapeur et/ou le dispositif de chauffe et diminue également la distance séparant le dispositif de chauffe et la cuve de génération de vapeur au niveau des protubérances, ce qui permet d'augmenter de manière sensible le transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur.The presence of such protuberances on the heat exchange surface and / or on the heating surface substantially increases the contact surface between the interface piece and the steam generation vessel and / or the heating device and also decreases the distance separating the heating device and the steam generating tank at the level of the protuberances, which makes it possible to increase significantly the heat transfer between the device of heater and the steam generation vessel.

De plus, la configuration des protubérances permet, dans d'éventuelles zones faiblement comprimées de la pièce d'interface, d'assurer malgré tout une pénétration au moins partielle des protubérances dans l'épaisseur de la pièce d'interface, et donc d'assurer, dans ces zones faiblement comprimées de la pièce d'interface, un contact thermique entre la pièce d'interface et la surface portant les protubérances. Un tel contact, même partiel, permet d'augmenter encore le transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur.In addition, the configuration of the protuberances makes it possible, in any weakly compressed zones of the interface piece, to ensure, despite everything, at least partial penetration of the protuberances in the thickness of the interface piece, and therefore of in these weakly compressed areas of the interface piece, ensuring a thermal contact between the interface piece and the surface bearing the protuberances. Such contact, even partial, makes it possible to further increase the heat transfer between the heating device and the steam generation vessel.

En outre, la présence des protubérances permet d'assurer, même dans des zones de la pièce d'interface où un jeu existe entre la pièce d'interface et la surface portant les protubérances, un transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur au moins via les protubérances.In addition, the presence of the protuberances makes it possible to ensure, even in areas of the interface piece where a clearance exists between the interface piece and the surface bearing the protuberances, a heat transfer between the heating device and the bowl. generating steam at least via the protuberances.

Par conséquent, la chaudière selon la présente invention présente un rendement énergétique bien supérieur à celui des chaudières de l'art antérieur.Therefore, the boiler according to the present invention has a much higher energy efficiency than boilers of the prior art.

La chaudière peut en outre présenter une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison.The boiler may further have one or more of the following features, taken alone or in combination.

Selon un mode de réalisation de l'invention, la géométrie des protubérances est déterminée de façon à limiter l'effort de pénétration des protubérances dans la pièce d'interface et à maximiser la surface de contact entre la pièce d'interface et la surface portant les protubérances.According to one embodiment of the invention, the geometry of the protuberances is determined so as to limit the penetration force of the protuberances in the interface piece and to maximize the contact surface between the interface piece and the bearing surface. the protuberances.

Selon un mode de réalisation de l'invention, la pièce d'interface comporte une première surface qui est sensiblement plane et qui est en contact avec la surface de chauffage, et une deuxième surface qui est opposée à la première surface, la deuxième surface étant sensiblement plane et en contact avec la surface d'échange thermique.According to one embodiment of the invention, the interface piece comprises a first surface which is substantially flat and which is in contact with the heating surface, and a second surface which is opposite to the first surface, the second surface being substantially flat and in contact with the heat exchange surface.

Selon un mode de réalisation de l'invention, chaque protubérance exerce une force d'appui contre la première surface ou la deuxième surface de la pièce d'interface.According to one embodiment of the invention, each protuberance exerts a bearing force against the first surface or the second surface of the interface piece.

Selon un mode de réalisation de l'invention, les protubérances prévues sur la surface d'échange thermique ou la surface de chauffage définissent une surface de contact développée qui est supérieure à une surface de référence plane ayant des dimensions identiques à la surface d'échange thermique ou à la surface de chauffage et qui est dépourvue de protubérance. Ces dispositions permettent d'augmenter encore le transfert thermique entre le dispositif de chauffe et la cuve de génération de vapeur.According to one embodiment of the invention, the protuberances provided on the heat exchange surface or the heating surface define a developed contact surface which is greater than a planar reference surface having dimensions identical to the heat exchange surface or the heating surface and which is devoid of protuberance. These arrangements make it possible to further increase the heat transfer between the heating device and the steam generation vessel.

Selon un mode de réalisation de l'invention, la surface d'échange thermique s'étend sensiblement parallèlement à la surface de chauffage.According to one embodiment of the invention, the heat exchange surface extends substantially parallel to the heating surface.

Selon un mode de réalisation de l'invention, les protubérances sont régulièrement réparties sur la surface d'échange thermique et/ou sur la surface de chauffage.According to one embodiment of the invention, the protuberances are regularly distributed over the heat exchange surface and / or on the heating surface.

Selon un mode de réalisation de l'invention, chaque protubérance présente une hauteur comprise entre 0,1 et 1,5 mm, et de préférence entre 0,2 et 0,5 mm.According to one embodiment of the invention, each protuberance has a height of between 0.1 and 1.5 mm, and preferably between 0.2 and 0.5 mm.

Selon un mode de réalisation de l'invention, chaque protubérance présente une largeur comprise entre 1 et 4 mm.According to one embodiment of the invention, each protuberance has a width of between 1 and 4 mm.

Selon un mode de réalisation de l'invention, chaque protubérance présente une forme pyramidale ou a globalement une forme de dôme. La forme pyramidale des protubérances permet notamment, pour une force de compression égale, d'augmenter le taux de déformation par compression de la pièce d'interface.According to one embodiment of the invention, each protuberance has a pyramidal shape or has a generally domed shape. In particular, the pyramidal shape of the protuberances makes it possible, for an equal compression force, to increase the rate of deformation by compression of the interface piece.

Selon un mode de réalisation de l'invention, la pièce d'interface est en graphite, avantageusement en graphite expansé.According to one embodiment of the invention, the interface piece is graphite, preferably expanded graphite.

Selon un mode de réalisation de l'invention, la pièce d'interface présente une épaisseur comprise entre 0,2 et 3 mm, et par exemple d'environ 0,5 mm.According to one embodiment of the invention, the interface piece has a thickness between 0.2 and 3 mm, and for example about 0.5 mm.

Selon un mode de réalisation de l'invention, la pièce d'interface présente une conductivité thermique comprise entre 0,5 et 80 W.m-1.K-1, et préférentiellement entre 1 et 15 W.m-1.K-1, dans une direction perpendiculaire à un plan d'extension de la pièce d'interface.According to one embodiment of the invention, the interface piece has a thermal conductivity of between 0.5 and 80 Wm -1 .K -1 , and preferably between 1 and 15 Wm -1 .K -1 , in a direction perpendicular to an extension plane of the interface piece.

Selon un mode de réalisation de l'invention, la première surface est sensiblement parallèle à la deuxième surface.According to one embodiment of the invention, the first surface is substantially parallel to the second surface.

Selon un mode de réalisation de l'invention, la pièce d'interface présente une forme de disque.According to one embodiment of the invention, the interface piece has a disk shape.

Selon un mode de réalisation de l'invention, le dispositif de chauffe comporte un corps chauffant, par exemple en alliage d'aluminium, dans lequel est intégré l'élément chauffant. La surface de chauffage est avantageusement ménagée sur le corps chauffant.According to one embodiment of the invention, the heating device comprises a heating body, for example aluminum alloy, in which is integrated the heating element. The heating surface is advantageously provided on the heating body.

Selon un mode de réalisation de l'invention, l'élément chauffant est une résistance chauffante électrique.According to one embodiment of the invention, the heating element is an electric heating resistor.

Selon un mode de réalisation de l'invention, l'élément chauffant présente une puissance d'au moins 1200 W.According to one embodiment of the invention, the heating element has a power of at least 1200 W.

Selon un mode de réalisation de l'invention, la cuve de génération de vapeur délimite une chambre de vaporisation.According to one embodiment of the invention, the steam generation vessel defines a vaporization chamber.

Selon un mode de réalisation de l'invention, la cuve de génération de vapeur comporte une demi-cuve inférieure comprenant le fond, et une demi-cuve supérieure fixée à la demi-cuve inférieure. Avantageusement, la chambre de vaporisation est délimitée par la demi-cuve inférieure et la demi-cuve supérieure.According to one embodiment of the invention, the steam generation vessel comprises a lower half-tank comprising the bottom, and an upper half-tank attached to the lower half-tank. Advantageously, the vaporization chamber is delimited by the lower half-tank and the upper half-tank.

Selon un mode de réalisation de l'invention, la demi-cuve inférieure et la demi-cuve supérieure sont chacune réalisées en acier inoxydable.According to one embodiment of the invention, the lower half-tank and the upper half-tank are each made of stainless steel.

Selon un mode de réalisation de l'invention, la cuve de génération de vapeur comporte une ouverture d'entrée d'eau permettant une introduction d'eau dans la chambre de vaporisation, et une ouverture de sortie de vapeur permettant une extraction de la vapeur formée dans la chambre de vaporisation. L'ouverture d'entrée d'eau peut par exemple être prévue sur la demi-coque inférieure, et l'ouverture de sortie de vapeur peut par exemple être prévue sur la demi-coque supérieure.According to one embodiment of the invention, the steam generating vessel comprises a water inlet opening for introducing water into the vaporization chamber, and a steam outlet opening for extracting the steam. formed in the vaporization chamber. The water inlet opening may for example be provided on the lower half-shell, and the steam outlet opening may for example be provided on the upper half-shell.

Selon un mode de réalisation de l'invention, la cuve de génération de vapeur peut comporter une soupape de refoulement reliée fluidiquement à l'ouverture de sortie de vapeur et configurée pour autoriser une extraction de la vapeur formée dans la chambre de vaporisation uniquement lorsque la pression dans la chambre de vaporisation dépasse un seuil prédéterminé.According to one embodiment of the invention, the steam generating vessel may comprise a discharge valve fluidly connected to the steam outlet opening and configured to allow extraction of the vapor formed in the vaporization chamber only when the pressure in the vaporization chamber exceeds a predetermined threshold.

Selon un mode de réalisation de l'invention, la cuve de génération de vapeur est fixée au dispositif de chauffe par vissage de manière à comprimer la pièce d'interface entre la surface de chauffage et la surface d'échange thermique.According to one embodiment of the invention, the steam generation vessel is fixed to the heating device by screwing so as to compress the part interface between the heating surface and the heat exchange surface.

Selon un mode de réalisation de l'invention, la cuve de génération de vapeur comporte des éléments de fixation filetés faisant saillie de la surface d'échange thermique, et le dispositif de chauffe comporte des orifices de fixation destinés chacun au passage d'un élément de fixation fileté respectif de la cuve de génération de vapeur.According to one embodiment of the invention, the steam generation vessel comprises threaded fastening elements projecting from the heat exchange surface, and the heating device comprises fixing holes each intended for the passage of an element. respective threaded fastening of the steam generation vessel.

Selon un mode de réalisation de l'invention, les éléments de fixation filetés sont immobilisés par rapport au dispositif de chauffe au moyen d'écrous de fixation vissés sur les éléments de fixation filetés.According to one embodiment of the invention, the threaded fastening elements are immobilized with respect to the heating device by means of fastening nuts screwed onto the threaded fasteners.

Selon un mode de réalisation de l'invention, la pièce d'interface comporte des orifices de passage destinés au passage des éléments de fixation filetés appartenant à la cuve de génération de vapeur.According to one embodiment of the invention, the interface piece has passage orifices for the passage of the threaded fasteners belonging to the steam generating vessel.

Selon un mode de réalisation de l'invention, le corps chauffant du dispositif de chauffe présente une forme générale de disque.According to one embodiment of the invention, the heating body of the heating device has a general disc shape.

Selon un mode de réalisation de l'invention, le fond de la cuve de génération de vapeur délimite en partie la chambre de vaporisation.According to one embodiment of the invention, the bottom of the steam generation vessel partially delimits the vaporization chamber.

La présente invention concerne en outre un appareil électroménager comportant une chaudière selon l'invention.The present invention further relates to an appliance comprising a boiler according to the invention.

Selon un mode de réalisation de l'invention, l'appareil électroménager est un appareil de repassage, tel qu'une centrale vapeur ou un fer à repasser dans lequel est intégrée la chaudière.According to one embodiment of the invention, the appliance is an ironing appliance, such as a steam generator or an iron in which the boiler is integrated.

L'invention sera mieux comprise à l'aide de la description qui suit en référence aux dessins schématiques annexés qui représentent, à titre d'exemples non limitatifs, deux formes d'exécution de cette chaudière.

  • La figure 1 est une vue en perspective d'une chaudière selon un premier mode de réalisation de l'invention.
  • La figure 2 est une vue éclatée, en perspective de dessous, de la chaudière de la figure 1.
  • La figure 3 est une vue éclatée, en perspective de dessus, de la chaudière de la figure 1.
  • La figure 4 est une vue à l'échelle agrandie d'un détail de la figure 3.
  • La figure 5 est une vue schématique partielle, en coupe, de la chaudière de la figure 1.
  • La figure 6 est une vue éclatée, en perspective de dessous, d'une chaudière selon un deuxième mode de réalisation de l'invention.
  • La figure 7 est une vue en coupe de la chaudière de la figure 6.
  • La figure 8 est une vue partielle, à l'échelle agrandie, d'un dispositif de chauffe de la chaudière de la figure 6.
  • La figure 9 est une vue schématique partielle, en coupe, de la chaudière de la figure 6.
The invention will be better understood with the aid of the description which follows with reference to the appended diagrammatic drawings which represent, by way of nonlimiting examples, two embodiments of this boiler.
  • The figure 1 is a perspective view of a boiler according to a first embodiment of the invention.
  • The figure 2 is an exploded view, in perspective from below, of the boiler of the figure 1 .
  • The figure 3 is an exploded view, in perspective from above, of the boiler of the figure 1 .
  • The figure 4 is an enlarged view of a detail of the figure 3 .
  • The figure 5 is a partial schematic view, in section, of the boiler of the figure 1 .
  • The figure 6 is an exploded view, in perspective from below, of a boiler according to a second embodiment of the invention.
  • The figure 7 is a sectional view of the boiler of the figure 6 .
  • The figure 8 is a partial view, on an enlarged scale, of a heating device of the boiler of the figure 6 .
  • The figure 9 is a partial schematic view, in section, of the boiler of the figure 6 .

Les figures 1 à 5 représentent une chaudière 2 pour un appareil de repassage, tel qu'une centrale vapeur.The Figures 1 to 5 represent a boiler 2 for an ironing appliance, such as a steam generator.

Comme montré plus particulièrement sur les figures 2 et 3, la chaudière 2 comprend un dispositif de chauffe 3 comportant un corps chauffant 4 pourvu d'une surface de chauffage 5. Le corps chauffant 4 peut par exemple être réalisé en alliage d'aluminium, et présenter une forme générale de disque.As shown more particularly in figures 2 and 3 , the boiler 2 comprises a heating device 3 comprising a heating body 4 provided with a heating surface 5. The heating body 4 may for example be made of aluminum alloy, and have a general shape of disc.

Le dispositif de chauffe 3 comprend en outre un élément chauffant 6 intégré dans le corps chauffant 4 et configuré pour chauffer la surface de chauffage 5. Le corps chauffant 4 peut par exemple être formé par surmoulage sur l'élément chauffant 6. L'élément chauffant 6 est avantageusement une résistance chauffante électrique, et peut par exemple présenter une puissance d'au moins 1200 W.The heating device 3 further comprises a heating element 6 integrated in the heating body 4 and configured to heat the heating surface 5. The heating body 4 may for example be formed by overmolding on the heating element 6. The heating element 6 is advantageously an electric heating resistor, and may for example have a power of at least 1200 W.

La chaudière 2 comprend également une cuve de génération de vapeur 7 fixée au dispositif de chauffe 3 par exemple par vissage. Selon le premier mode de réalisation de l'invention, la cuve de génération de vapeur 7 comporte une demi-cuve inférieure 7.1 et une demi-cuve supérieure 7.2 fixées l'une à l'autre et délimitant une chambre de vaporisation. La demi-cuve inférieure 7.1 et la demi-cuve supérieure 7.2 sont chacune avantageusement réalisées en acier inoxydable.The boiler 2 also comprises a steam generation vessel 7 fixed to the heating device 3, for example by screwing. According to the first embodiment of the invention, the steam generation vessel 7 comprises a lower half-tank 7.1 and an upper half-tank 7.2 fixed to one another and defining a vaporization chamber. The lower half-bowl 7.1 and the upper half-bowl 7.2 are each advantageously made of stainless steel.

La demi-cuve inférieure 7.1 comprend plus particulièrement un fond 9 qui délimite en partie la chambre de vaporisation, et qui est pourvu d'une surface d'échange thermique 11 qui est tournée vers la surface de chauffage 5. Avantageusement, la surface d'échange thermique 11 s'étend sensiblement parallèlement à la surface de chauffage 5.The lower half-bowl 7.1 more particularly comprises a bottom 9 which partially delimits the vaporization chamber, and which is provided with a heat exchange surface 11 which is turned towards the heating surface 5. Advantageously, the heat exchange surface 11 extends substantially parallel to the heating surface 5.

Selon le premier mode de réalisation de l'invention, la cuve de génération de vapeur 7 comporte des éléments de fixation filetés 12, tels que des goujons, faisant saillie perpendiculairement de la surface d'échange thermique 11, et le dispositif de chauffe 3 comporte des orifices de fixation 13 destinés chacun au passage d'un élément de fixation fileté 12 respectif de la cuve de génération de vapeur 7. Les éléments de fixation filetés 12 sont avantageusement immobilisés par rapport au dispositif de chauffe 3 au moyen d'écrous de fixation 14 vissés sur les éléments de fixation filetés 12. Les éléments de fixation filetés 12 peuvent par exemple être fixés sur la demi-cuve inférieure 7.1 par soudage, et par exemple par soudage par décharge électrique.According to the first embodiment of the invention, the steam generation vessel 7 comprises threaded fastening elements 12, such as studs, protruding perpendicularly from the heat exchange surface 11, and the heating device 3 comprises fixing holes 13 each for the passage of a respective threaded fastener 12 of the steam generating vessel 7. The threaded fasteners 12 are preferably immobilized with respect to the heater 3 by means of fastening nuts The threaded fasteners 12 may for example be fastened to the lower half-bowl 7.1 by welding, and for example by electric discharge welding.

La cuve de génération de vapeur 7 comporte également une ouverture d'entrée d'eau (non visible sur les figures) permettant une introduction d'eau dans la chambre de vaporisation, et une ouverture de sortie de vapeur (non visible sur les figures) permettant une extraction de la vapeur formée dans la chambre de vaporisation. L'ouverture d'entrée d'eau peut par exemple être prévue sur la demi-coque inférieure 7.1, et l'ouverture de sortie de vapeur peut par exemple être prévue sur la demi-coque supérieure 7.2.The steam generation vessel 7 also comprises a water inlet opening (not visible in the figures) allowing water to be introduced into the vaporization chamber, and a steam outlet opening (not visible in the figures). allowing an extraction of the steam formed in the vaporization chamber. The water inlet opening may for example be provided on the lower half-shell 7.1, and the steam outlet opening may for example be provided on the upper half-shell 7.2.

La cuve de génération de vapeur 7 comporte de plus un raccord d'entrée 17 qui est raccordé à l'ouverture d'entrée d'eau, et un raccord de refoulement 18 qui est raccordé à l'ouverture de sortie de vapeur. De façon avantageuse, le raccord de refoulement 18 peut comporter une soupape de refoulement reliée fluidiquement à l'ouverture de sortie de vapeur et configurée pour autoriser une extraction de la vapeur formée dans la chambre de vaporisation uniquement lorsque la pression dans la chambre de vaporisation dépasse un seuil prédéterminé.The steam generating vessel 7 further includes an inlet connector 17 which is connected to the water inlet opening, and a discharge connector 18 which is connected to the steam outlet opening. Advantageously, the discharge connection 18 may comprise a discharge valve fluidly connected to the steam outlet opening and configured to allow extraction of the vapor formed in the vaporization chamber only when the pressure in the vaporization chamber exceeds a predetermined threshold.

La chaudière 2 comprend de plus une pièce d'interface 19, souple, disposée entre la surface de chauffage 5 et la surface d'échange thermique 11. Selon le premier mode de réalisation de l'invention, la pièce d'interface 19 présente une forme de disque, et comporte une première surface 21 qui est sensiblement plane et qui est en contact avec la surface de chauffage 5, et une deuxième surface 22 opposée à la première surface 21. La deuxième surface 22 est également sensiblement plane et est en contact avec la surface d'échange thermique 11.The boiler 2 further comprises a flexible interface piece 19 disposed between the heating surface 5 and the heat exchange surface 11. According to the first embodiment of the invention, the interface piece 19 has a disc shape, and has a first surface 21 which is substantially flat and which is in contact with the heating surface 5, and a second surface 22 opposite the first surface 21. The second surface 22 is also substantially flat and is in contact with the heat exchange surface 11.

De façon avantageuse, la cuve de génération de vapeur 7 est fixée au dispositif de chauffe 3 de telle sorte que la pièce d'interface 19 est comprimée, c'est-à-dire prise en sandwich, entre la surface de chauffage 5 et la surface d'échange thermique 11. Avantageusement, la pièce d'interface 19 est en graphite expansé, et présente une épaisseur comprise entre 0,2 et 1 mm, et par exemple d'environ 0,5 mm.Advantageously, the steam generating vessel 7 is attached to the heater 3 so that the interface piece 19 is compressed, i.e., sandwiched, between the heating surface 5 and the heater. Heat exchange surface 11. Advantageously, the interface piece 19 is expanded graphite, and has a thickness of between 0.2 and 1 mm, for example about 0.5 mm.

La pièce d'interface 19 est thermiquement conductrice, et présente de façon avantageuse une conductivité thermique de l'ordre de 4 à 6 W.m-1.K-1 dans une direction perpendiculaire au plan d'extension de la pièce d'interface 19.The interface piece 19 is thermally conductive, and advantageously has a thermal conductivity of the order of 4 to 6 Wm -1 .K -1 in a direction perpendicular to the extension plane of the interface piece 19.

La pièce d'interface 19 comporte également des orifices de passage 23 destinés au passage des éléments de fixation filetés 12 appartenant à la cuve de génération de vapeur 7. Chaque orifice de passage 23 présente plus particulièrement un diamètre supérieur au diamètre de l'élément de fixation fileté 12 respectif.The interface piece 19 also has through-holes 23 for the passage of the threaded fastening elements 12 belonging to the steam generation vessel 7. Each passage orifice 23 more particularly has a diameter greater than the diameter of the element of the invention. respective threaded fastener 12.

Comme montré plus particulièrement sur les figures 3 à 5, la surface de chauffage 5 présente des protubérances 24 configurées pour comprimer au moins partiellement la pièce d'interface 19 et pour pénétrer dans l'épaisseur de la pièce d'interface 19. Avantageusement, les protubérances 24 sont régulièrement réparties sur la surface de chauffage 5, et sont configurées chacune pour exercer une force d'appui contre la première surface 21 de la pièce d'interface 19.As shown more particularly in Figures 3 to 5 , the heating surface 5 has protuberances 24 configured to at least partially compress the interface part 19 and to penetrate into the thickness of the interface part 19. Advantageously, the protuberances 24 are evenly distributed over the heating surface 5, and are each configured to exert a pressing force against the first surface 21 of the interface piece 19.

Selon le premier mode de réalisation de l'invention, chaque protubérance 24 présente une forme générale de dôme. Chaque protubérance 24 peut par exemple présenter une hauteur comprise entre 0,2 et 1 mm, et de préférence entre 0,2 et 0,5 mm, et peut par exemple présenter une largeur comprise entre 1 et 2 mm.According to the first embodiment of the invention, each protuberance 24 has a general dome shape. Each protrusion 24 may for example have a height of between 0.2 and 1 mm, and preferably between 0.2 and 0.5 mm, and may for example have a width of between 1 and 2 mm.

De façon avantageuse, les protubérances 24 prévues sur la surface de chauffage 5 définissent une surface de contact développée qui est supérieure à une surface de référence ayant des dimensions identiques à la surface de chauffage 5 et qui est dépourvue de protubérance.Advantageously, the protuberances 24 provided on the heating surface 5 define a developed contact surface which is greater than a reference surface having dimensions identical to the heating surface 5 and which is devoid of protuberance.

Les figures 6 à 9 représentent une chaudière 2 selon un deuxième mode de réalisation de l'invention qui diffère du premier mode de réalisation essentiellement en ce que chaque protubérance 24 prévue sur la surface de chauffage présente une forme pyramidale. La chambre de vaporisation 8 de la cuve de génération de vapeur 7 de la chaudière selon le deuxième mode de réalisation de l'invention est plus particulièrement visible sur la figure 7.The Figures 6 to 9 represent a boiler 2 according to a second embodiment of the invention which differs from the first embodiment essentially in that each protuberance 24 provided on the heating surface has a pyramidal shape. The vaporization chamber 8 of the steam generation vessel 7 of the boiler according to the second embodiment of the invention is more particularly visible on the figure 7 .

Bien entendu, la présente invention n'est nullement limitée aux modes de réalisation décrits et illustrés qui n'ont été donnés qu'à titre d'exemples. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention. Par exemple, les protubérances 24 pourraient être prévues sur la surface d'échange thermique 11, ou des protubérances pourraient être prévues d'une part sur la surface d'échange thermique 11 et d'autre part sur la surface de chauffage 5.Of course, the present invention is not limited to the described and illustrated embodiments which have been given only as examples. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention. For example, the protuberances 24 could be provided on the heat exchange surface 11, or protuberances could be provided on the one hand on the heat exchange surface 11 and on the other hand on the heating surface 5.

Claims (13)

Chaudière (2) pour appareil électroménager, comprenant : - un dispositif de chauffe (3) comprenant une surface de chauffage (5), et un élément chauffant (6) configuré pour chauffer la surface de chauffage (5), - une cuve de génération de vapeur (7) comprenant un fond (9) pourvu d'une surface d'échange thermique (11), la cuve de génération de vapeur (7) étant fixée au dispositif de chauffe (3), et - une pièce d'interface (19) disposée entre la surface de chauffage (5) et la surface d'échange thermique (11), la pièce d'interface (19) étant thermiquement conductrice et étant comprimée entre la surface de chauffage (5) et la surface d'échange thermique (11), caractérisée en ce que la surface d'échange thermique (11) et/ou la surface de chauffage (5) présente des protubérances (24) comprimant au moins partiellement la pièce d'interface (19) et pénétrant dans l'épaisseur de la pièce d'interface (19).Boiler (2) for household appliances, comprising: a heating device (3) comprising a heating surface (5), and a heating element (6) configured to heat the heating surface (5), - a steam generating vessel (7) comprising a bottom (9) provided with a heat exchange surface (11), the steam generating vessel (7) being attached to the heater (3), and an interface piece (19) disposed between the heating surface (5) and the heat exchange surface (11), the interface piece (19) being thermally conductive and being compressed between the heating surface (5) ) and the heat exchange surface (11), characterized in that the heat exchange surface (11) and / or the heating surface (5) has protuberances (24) at least partially compressing the interface piece (19) and penetrating into the thickness of the room interface (19). Chaudière (2) selon la revendication 1, dans laquelle la pièce d'interface (19) comporte une première surface (21) qui est sensiblement plane et qui est en contact avec la surface de chauffage (5), et une deuxième surface (22) qui est opposée à la première surface (21), la deuxième surface (22) étant sensiblement plane et en contact avec la surface d'échange thermique (11).Boiler (2) according to claim 1, wherein the interface piece (19) has a first surface (21) which is substantially flat and which is in contact with the heating surface (5), and a second surface (22). ) which is opposite the first surface (21), the second surface (22) being substantially planar and in contact with the heat exchange surface (11). Chaudière (2) selon la revendication 2, dans laquelle chaque protubérance (24) exerce une force d'appui contre la première surface (21) ou la deuxième surface (22) de la pièce d'interface (19).Boiler (2) according to claim 2, wherein each protuberance (24) exerts a pressing force against the first surface (21) or the second surface (22) of the interface piece (19). Chaudière (2) selon l'une quelconque des revendications 1 à 3, dans laquelle les protubérances (24) prévues sur la surface d'échange thermique (11) ou la surface de chauffage (5) définissent une surface de contact développée qui est supérieure à une surface de référence plane ayant des dimensions identiques à la surface d'échange thermique (11) ou à la surface de chauffage (5) et qui est dépourvue de protubérance.Boiler (2) according to any one of claims 1 to 3, wherein the protuberances (24) provided on the heat exchange surface (11) or the heating surface (5) define a developed contact surface which is superior to a planar reference surface having dimensions identical to the heat exchange surface (11) or to the heating surface (5) and which is devoid of protuberance. Chaudière (2) selon l'une quelconque des revendications 1 à 4, dans laquelle les protubérances (24) sont régulièrement réparties sur la surface d'échange thermique (11) et/ou sur la surface de chauffage (5).Boiler (2) according to any one of claims 1 to 4, wherein the protuberances (24) are regularly distributed over the heat exchange surface (11) and / or on the heating surface (5). Chaudière (2) selon l'une quelconque des revendications 1 à 5, dans laquelle chaque protubérance (24) présente une hauteur comprise entre 0,1 et 1,5 mm, et de préférence entre 0,2 et 0,5 mm.Boiler (2) according to any one of claims 1 to 5, wherein each protrusion (24) has a height of between 0.1 and 1.5 mm, and preferably between 0.2 and 0.5 mm. Chaudière (2) selon l'une quelconque des revendications 1 à 6, dans laquelle chaque protubérance (24) présente une largeur comprise entre 1 et 4 mm.Boiler (2) according to any one of claims 1 to 6, wherein each protuberance (24) has a width of between 1 and 4 mm. Chaudière (2) selon l'une quelconque des revendications 1 à 7, dans laquelle chaque protubérance (24) présente une forme pyramidale ou a globalement une forme de dôme.Boiler (2) according to any one of claims 1 to 7, wherein each protuberance (24) has a pyramidal shape or generally a dome shape. Chaudière (2) selon l'une quelconque des revendications 1 à 8, dans laquelle la pièce d'interface (19) est en graphite, avantageusement en graphite expansé.Boiler (2) according to any one of claims 1 to 8, wherein the interface piece (19) is graphite, preferably expanded graphite. Chaudière (2) selon l'une quelconque des revendications 1 à 9, dans laquelle la pièce d'interface (19) présente une épaisseur comprise entre 0,2 et 3 mm.Boiler (2) according to any one of claims 1 to 9, wherein the interface piece (19) has a thickness between 0.2 and 3 mm. Chaudière (2) selon l'une quelconque des revendications 1 à 10, dans laquelle la cuve de génération de vapeur (7) comporte des éléments de fixation filetés (12) faisant saillie de la surface d'échange thermique (11), et le dispositif de chauffe (3) comporte des orifices de fixation (13) destinés chacun au passage d'un élément de fixation fileté (12) respectif de la cuve de génération de vapeur (7).Boiler (2) according to any one of claims 1 to 10, wherein the steam generating vessel (7) has threaded fasteners (12) projecting from the heat exchange surface (11), and the heating device (3) has fixing holes (13) each for the passage of a respective threaded fastener (12) of the steam generating vessel (7). Appareil électroménager comportant une chaudière (2) selon l'une quelconque des revendications 1 à 11.Domestic appliance comprising a boiler (2) according to any one of claims 1 to 11. Appareil électroménager selon la revendication 12, lequel est un appareil de repassage.Domestic appliance according to claim 12, which is an ironing appliance.
EP18211137.7A 2017-12-22 2018-12-07 Boiler for a household appliance Active EP3502583B1 (en)

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CN109973965A (en) 2019-07-05
EP3502583B1 (en) 2020-06-24
FR3075937B1 (en) 2019-11-22
CN209763009U (en) 2019-12-10

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