WO2000029787A1 - Steam generator with fast bleeding - Google Patents

Steam generator with fast bleeding Download PDF

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Publication number
WO2000029787A1
WO2000029787A1 PCT/IB1999/001932 IB9901932W WO0029787A1 WO 2000029787 A1 WO2000029787 A1 WO 2000029787A1 IB 9901932 W IB9901932 W IB 9901932W WO 0029787 A1 WO0029787 A1 WO 0029787A1
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WO
WIPO (PCT)
Prior art keywords
steam
water
circuit
steam generator
generator according
Prior art date
Application number
PCT/IB1999/001932
Other languages
French (fr)
Inventor
Ulrich Demuth
Original Assignee
Rowenta Werke Gmbh
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 Rowenta Werke Gmbh filed Critical Rowenta Werke Gmbh
Priority to DE19983757T priority Critical patent/DE19983757T1/en
Publication of WO2000029787A1 publication Critical patent/WO2000029787A1/en

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Classifications

    • 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
    • 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
    • F22B1/288—Instantaneous electrical steam generators built-up from heat-exchange elements arranged within a confined chamber having heat-retaining walls

Definitions

  • the present invention relates to steam generators, where the water evaporates almost instantaneously, and in particular to the generators provided for supplying the irons via a connecting tube, these generators being however transposable to all other household appliances using steam, such as a steam cleaner or the like.
  • the boiler at rest does not contain water and the pump started on demand for steam has a mass flow of water equal to the mass flow of steam when the latter is stabilized, which is quickly the case.
  • This exchange power through the contact surface is in any case limited by the phenomenon of heat build-up which appears for too high power densities and by scaling of the surface.
  • Generators with a large vapor flow rate scale quickly so they are most often equipped with a treatment means consisting of a porous bed of granulated products, for example demineralizing ion exchange resin, placed in a cartridge or a reservoir along the water circuit.
  • a treatment means consisting of a porous bed of granulated products, for example demineralizing ion exchange resin, placed in a cartridge or a reservoir along the water circuit.
  • the pumped water passes through this water treatment bed throughout its passage section.
  • the efficiency decreases faster than the characteristics of the treatment bed would suggest. Indeed under the action of the water flow and time, particles tend to compact locally and the water to follow in the bed of the preferential paths so that the flow is no longer uniform in the passage section and locally too important for effective treatment and regular and complete consumption of the entire treatment bed.
  • the invention described below has for its object an almost instantaneous steam generator in which the shutdown of the useful steam flow is immediate.
  • Another object is a significant improvement in the operation and the lifespan of the processing means.
  • the steam generator further comprises means for purging the boiler and the steam circuit directly at atmospheric pressure which are activated at the end of use of the steam.
  • the pump stopped, the leak caused by the purge no longer allows the iron to be supplied normally despite the evaporation of the residual water because the pressure drops rapidly and vanishes sufficiently even before the boiler is completely dried.
  • the purging means oppose the flow of steam a pressure drop much lower than that of the connecting tube and the user device.
  • the vapor flow rate resulting from the evaporation of the residual water from the boiler and the pressurized steam in the dead volumes of the boiler, of the connection tube and even of the user device is preferably escaped by the purge and the device stops being powered instantly.
  • the purge flow is directed into the water tank at atmospheric pressure of the generator by a circuit element common to the water circuit going from the tank to the pump and to the boiler. This allows the vapor to recondense in the tank in contact with cold water and facilitates the establishment of the treatment means on a single pipe.
  • the purge circuit comprises a solenoid valve opening the circuit at the end of use of the steam, at least for a predetermined time during the stopping of use.
  • the opening occurs when the steam control button is released.
  • the possible limitation of the opening time has the advantage of requiring only a solenoid valve closed at rest with a low electric-demand and low-demand running time factor.
  • the solenoid valve also constitutes a safety device against overpressure in the steam circuit.
  • the generator comprises a means for treating the water which the purge flow crosses against the current.
  • the water treatment means is located along or in the extension of the circuit element common to the purge and to the pumped water circuit.
  • the water inlet and the steam outlet being made by the same orifice of the treatment means, as well as for the water outlet and the steam inlet, the construction and the setting up the treatment means is very simple.
  • the water treatment means comprises a solid treatment product divided into granules or powder. Steam is suddenly admitted against the current in the water circuit, which cleans and stirs the particles of the treatment product that it may contain by driving them back. In this way, the particle bed is homogenized at each purge and the preferential water passage zones which could have been established are destroyed. The treatment product is then better used.
  • the water treatment product is an anti-scale resin.
  • the generator has a steam humidification circuit connecting the water circuit to the steam circuit through a pump.
  • FIG. 1 is a diagram of an apparatus using a generator according to the invention
  • FIG. 2 is a diagram of a first variant of the previous device.
  • FIG. 3 is a diagram of a second variant of the apparatus of Figure 1.
  • the appliance comprises a steam iron 1 provided with a steam control 11 and connected by a cord comprising a connecting tube 2 to a steam generator 3 represented by a dashed line frame on the diagram.
  • the generator 3 comprises a water tank 31, a pump 32, a boiler 33 provided with its heating element 331 and its regulation not shown, a solenoid valve 34 and a cartridge 35 containing granules of a demineralizing resin.
  • the water in the reservoir can flow in a line 40 through the cartridge 35 which constitutes an extension.
  • Line 40 ends with a distributor 41 from which all the hydraulic circuits start.
  • the pump 32 connected to the distributor 41 by a line 320 injects the water through the line 321 in the boiler 33.
  • the steam from the boiler 33 escapes therefrom via the pipe 332 to the connection tube 2 to supply the iron 1.
  • the solenoid valve 34 is connected by pipes on the one hand to the distributor 41 and d on the other hand at the water inlet of the boiler 33 on line 321.
  • the solenoid valve 34 at rest has its valve held in its seat against the pressure in the pipe 321 by a calibrated spring.
  • a pump 36 has its suction connected to the distributor 41 and its outlet connected to the pipe 332.
  • the pumps 32 and 36 are stopped and the solenoid valve 34 closed.
  • the iron 1 and the boiler 33 heat up to their set temperatures.
  • the housewife can then iron.
  • the pump 32 starts up and draws water from the reservoir 31 through the cartridge 35, the pipes 40, 41, 320 and discharges it into the boiler 33 via the pipe 321. There the water spreads by wetting the hot surface and boiling.
  • the steam comes out of the boiler 33 via line 332 to reach the iron 1 through the connection tube 2.
  • the pressure in the boiler is then sufficient to overcome all the pressure drops, especially that of the small diameter connection tube and very long.
  • pump 36 can be activated, which provides a small additional flow of water, which mixes with steam in line 332 and humidifies it. If the pressure rises excessively, for example due to a pinching of the connection tube 2, the valve of the solenoid valve lifts and causes a leak towards the tank, which has the effect of limiting the pressure to the value corresponding to the spring setting.
  • FIG. 2 In another version (FIG. 2) not comprising a humidifier circuit, the treatment cartridge 35 is placed along the line 333 between the boiler and the nozzle on the line 321 connecting the pump 32 and the solenoid valve 34. Operation is quite similar to that of the previous version.
  • the purge flow passes from the boiler 33 to the cartridge 35 while the water flow passes from the pump 32 to the cartridge 35 and to the boiler 33 by the same line 321, 333 common to the two circuits.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)
  • Air Humidification (AREA)

Abstract

The invention concerns a steam generator wherein water evaporates almost instantaneously for supplying a household electric appliance (1) via a connecting tube (2) and comprising in series a water reservoir (31), a pump (32), a boiler (33) provided with a heating element (331) and its adjusting element, and comprising means for bleeding (34) at atmospheric pressure the boiler and the steam circuit which are activated when steam has been used. The extraction flow passes in counter-current flow through water-treating means (35).

Description

GENERATEUR DE VAPEUR A PURGE RAPIDE FAST PURGE STEAM GENERATOR
La présente invention concerne les générateurs de vapeur, où l'eau s'évapore de façon quasi instantanée, et notamment aux générateurs prévus pour alimenter les fers à repasser via un tube de liaison, ces générateurs étant toutefois transposables à tous autres appareils électroménagers utilisant de la vapeur, tel qu'un nettoyeur à vapeur ou autre.The present invention relates to steam generators, where the water evaporates almost instantaneously, and in particular to the generators provided for supplying the irons via a connecting tube, these generators being however transposable to all other household appliances using steam, such as a steam cleaner or the like.
On connaît les générateurs de vapeur alimentant des fers à repasser auquel ils sont reliés par un tube de liaison, ce tube suivant généralement une liaison électrique. On s'intéresse plus spécialement au type de générateur comprenant un réservoir d'eau à la pression atmosphérique et une pompe prélevant l'eau de ce réservoir pour l'injecter dans un bouilleur maintenu à température constante. Un tel générateur quasi instantané est connu par exemple par le brevet FR 2747403.There are known steam generators supplying irons to which they are connected by a connecting tube, this tube generally following an electrical connection. We are more particularly interested in the type of generator comprising a water tank at atmospheric pressure and a pump taking water from this tank to inject it into a boiler maintained at constant temperature. Such an almost instantaneous generator is known, for example, from patent FR 2747403.
Le bouilleur au repos ne contient pas d'eau et la pompe mise en route à la demande de vapeur a un débit massique d'eau égal au débit massique de vapeur lorsque celui ci est stabilisé, ce qui est rapidement le cas. En effet il suffit, pour obtenir un débit massique de vapeur égal au débit massique injecté, que l'eau mouille une surface suffisante du bouilleur de façon à ce que la puissance thermique nécessaire à l'évaporation soit transmise, des dispositions pouvant être prises comme celles citées dans le brevet EP 821 096 pour faciliter l'étalement de l'eau. Cette puissance d'échange à travers la surface de contact est de toutes façons limitée par le phénomène de caléfaction qui apparaît pour des densités de puissance trop élevées et par l'entartrage de la surface.The boiler at rest does not contain water and the pump started on demand for steam has a mass flow of water equal to the mass flow of steam when the latter is stabilized, which is quickly the case. In fact, it is sufficient, in order to obtain a mass flow rate of vapor equal to the mass flow rate injected, for the water to wet a sufficient surface of the boiler so that the thermal power necessary for evaporation is transmitted, arrangements can be made as those cited in patent EP 821 096 to facilitate the spreading of water. This exchange power through the contact surface is in any case limited by the phenomenon of heat build-up which appears for too high power densities and by scaling of the surface.
On conçoit donc que la surface mouillée puisse être assez grande et qu'il puisse s'établir une mince flaque d'eau dans le bouilleur. Quand on relâche la touche de commande de vapeur la pompe s'arrête mais cette eau continue à s'évaporer en s'asséchant ce qui donne du retard à Jarret de vaporisation, perturbe le repassage et est désagréable à l'usage. Une façon de résoudre cet inconvénient consiste, comme expliqué dans le brevet EP 287985, à utiliser une électrovanne de fermeture du circuit vapeur à la sortie du bouilleur associée à une vanne de décharge se mettant en fonction quand la pression dépasse un maximum. Un dispositif voisin est également décrit dans les brevets FR 2 391 309 et EP 821 096. Cet agencement résout le problème précité, mais au prix de deux composants et de leurs commandes. En outre la pression de décharge de l'excès de vapeur n'étant pas nulle le bouilleur peut rester sous pression inutilement.It is therefore understandable that the wet surface can be quite large and that a thin puddle of water can settle in the boiler. When the steam control button is released, the pump stops but this water continues to evaporate as it dries, which gives delay to the steaming stop, disturbs ironing and is unpleasant in use. One way of overcoming this drawback consists, as explained in patent EP 287985, of using a closing solenoid valve. of the steam circuit at the outlet of the boiler associated with a relief valve which starts when the pressure exceeds a maximum. A neighboring device is also described in patents FR 2 391 309 and EP 821 096. This arrangement solves the aforementioned problem, but at the cost of two components and their controls. In addition, the discharge pressure of the excess vapor not being zero, the boiler can remain under pressure unnecessarily.
Dans ce qui suit, pour simplifier, on utilisera le mot " débit " sans plus préciser s'il faut entendre une masse ou un volume de fluide par unité de temps, s'agissant d'un courant de fluide, eau, vapeur ou mélange des deux à des taux divers quand il s'agit de la purge.In what follows, for simplicity, we will use the word "flow" without further specifying whether to understand a mass or a volume of fluid per unit of time, in the case of a flow of fluid, water, vapor or mixture of the two at various rates when it comes to purging.
Les générateurs ayant un gros débit de vapeur s'entartrent rapidement, aussi sont- ils le plus souvent équipés d'un moyen de traitement consistant en un lit poreux de produits granulés, par exemple de résine échangeuse d'ions déminéralisante, disposé dans une cartouche ou un réservoir le long du circuit d'eau. L'eau pompée traverse ce lit de traitement de l'eau dans toute sa section de passage. Cependant on constate que l'efficacité diminue plus vite que ne le laisseraient penser les caractéristiques du lit de traitement. En effet sous l'action du débit d'eau et du temps, des particules ont tendance à se compacter localement et l'eau à suivre dans le lit des chemins préférentiels de sorte que le débit n'est plus uniforme dans la section de passage et localement trop important pour un traitement efficace et une consommation régulière et complète de tout le lit de traitement.Generators with a large vapor flow rate scale quickly, so they are most often equipped with a treatment means consisting of a porous bed of granulated products, for example demineralizing ion exchange resin, placed in a cartridge or a reservoir along the water circuit. The pumped water passes through this water treatment bed throughout its passage section. However, it is found that the efficiency decreases faster than the characteristics of the treatment bed would suggest. Indeed under the action of the water flow and time, particles tend to compact locally and the water to follow in the bed of the preferential paths so that the flow is no longer uniform in the passage section and locally too important for effective treatment and regular and complete consumption of the entire treatment bed.
Pour obvier les inconvénients cités, l'invention décrite ci après a pour objet un générateur de vapeur quasi instantané dans lequel l'arrêt du débit de vapeur utile est immédiat.To obviate the aforementioned drawbacks, the invention described below has for its object an almost instantaneous steam generator in which the shutdown of the useful steam flow is immediate.
Un autre objet est une amélioration sensible du fonctionnement et de la durée de vie des moyens de traitement.Another object is a significant improvement in the operation and the lifespan of the processing means.
Les buts de l'invention sont atteints en ce que le générateur de vapeur comprend en outre des moyens de purge du bouilleur et du circuit de vapeur directement à la pression atmosphérique qui s'activent en fin d'utilisation de la vapeur. La pompe arrêtée, la fuite occasionnée par la purge ne permet plus au fer d'être alimenté normalement malgré l'évaporation de l'eau résiduelle parce que la pression chute rapidement et s'annule de façon suffisante avant même que le bouilleur soit complètement asséché.The objects of the invention are achieved in that the steam generator further comprises means for purging the boiler and the steam circuit directly at atmospheric pressure which are activated at the end of use of the steam. The pump stopped, the leak caused by the purge no longer allows the iron to be supplied normally despite the evaporation of the residual water because the pressure drops rapidly and vanishes sufficiently even before the boiler is completely dried.
De préférence les moyens de purge opposent au débit de vapeur une perte de charge très inférieure à celle du tube de liaison et de l'appareil utilisateur. Le débit de vapeur résultant de l'évaporation de l'eau résiduelle du bouilleur et de la vapeur sous pression dans les volumes morts du bouilleur, du tube de liaison et même de l'appareil utilisateur s'échappe préférentiellement par la purge et l'appareil cesse d'être alimenté instantanément.Preferably the purging means oppose the flow of steam a pressure drop much lower than that of the connecting tube and the user device. The vapor flow rate resulting from the evaporation of the residual water from the boiler and the pressurized steam in the dead volumes of the boiler, of the connection tube and even of the user device is preferably escaped by the purge and the device stops being powered instantly.
De préférence le débit de purge est dirigé dans le réservoir d'eau à pression atmosphérique du générateur par un élément de circuit commun au circuit d'eau allant du réservoir à la pompe et au bouilleur. Ceci permet à la vapeur de se recondenser dans le réservoir au contact de l'eau froide et facilite la mise en place du moyen de traitement sur une conduite unique.Preferably the purge flow is directed into the water tank at atmospheric pressure of the generator by a circuit element common to the water circuit going from the tank to the pump and to the boiler. This allows the vapor to recondense in the tank in contact with cold water and facilitates the establishment of the treatment means on a single pipe.
De préférence le circuit de purge comprend une électrovanne ouvrant le circuit en fin d'utilisation de la vapeur, au moins pour un temps prédéterminé pendant l'arrêt d'utilisation. L'ouverture survient au relâchement du bouton de commande de vapeur. La limitation éventuelle du temps d'ouverture a l'avantage de ne nécessiter qu'une électrovanne fermée au repos à faible facteur de temps de marche électriquement peu sollicitée et économique.Preferably the purge circuit comprises a solenoid valve opening the circuit at the end of use of the steam, at least for a predetermined time during the stopping of use. The opening occurs when the steam control button is released. The possible limitation of the opening time has the advantage of requiring only a solenoid valve closed at rest with a low electric-demand and low-demand running time factor.
Dans une version préférée l'électrovanne constitue aussi un organe de sécurité contre une surpression dans le circuit de vapeur.In a preferred version the solenoid valve also constitutes a safety device against overpressure in the steam circuit.
De préférence le générateur comporte un moyen de traitement de l'eau que le débit de purge traverse à contre courant.Preferably, the generator comprises a means for treating the water which the purge flow crosses against the current.
De préférence le moyen de traitement de l'eau est situé le long ou dans le prolongement de l'élément de circuit commun à la purge et au circuit d'eau pompée. L'entrée d'eau et la sortie de vapeur se faisant par le même orifice du moyen de traitement, ainsi que pour la sortie d'eau et l'entrée de vapeur, la construction et la mise en place du moyen de traitement se trouve très simple.Preferably the water treatment means is located along or in the extension of the circuit element common to the purge and to the pumped water circuit. The water inlet and the steam outlet being made by the same orifice of the treatment means, as well as for the water outlet and the steam inlet, the construction and the setting up the treatment means is very simple.
De préférence le moyen de traitement de l'eau comprend un produit de traitement solide divisé en granulés ou pulvérulent. La vapeur est admise brutalement à contre courant du circuit d'eau, ce qui nettoie et remue en les refoulant les particules du produit de traitement qu'il peut contenir. De cette façon on homogénéise le lit de particules à chaque purge et on détruit les zones de passage préférentiel de l'eau qui auraient pu s'établir. Le produit de traitement s'en trouve alors mieux utilisé.Preferably the water treatment means comprises a solid treatment product divided into granules or powder. Steam is suddenly admitted against the current in the water circuit, which cleans and stirs the particles of the treatment product that it may contain by driving them back. In this way, the particle bed is homogenized at each purge and the preferential water passage zones which could have been established are destroyed. The treatment product is then better used.
De préférence le produit de traitement de l'eau est une résine anti tartre.Preferably the water treatment product is an anti-scale resin.
De préférence le générateur comporte un circuit d'humidification de la vapeur reliant le circuit d'eau au circuit de vapeur au travers d'une pompe.Preferably the generator has a steam humidification circuit connecting the water circuit to the steam circuit through a pump.
La présente invention sera mieux comprise à l'aide de la description qui va suivre, ainsi que par les dessins annexés, donnés à titre d'exemples non limitatifs, parmi lesquels :The present invention will be better understood with the aid of the description which follows, as well as by the appended drawings, given by way of nonlimiting examples, among which:
- la figure 1 est un schéma d'un appareil utilisant un générateur selon l'invention,FIG. 1 is a diagram of an apparatus using a generator according to the invention,
- la figure 2 est un schéma d'une première variante de l'appareil précédent.- Figure 2 is a diagram of a first variant of the previous device.
- la figure 3 est un schéma d'une deuxième variante de l'appareil de la figure 1.- Figure 3 is a diagram of a second variant of the apparatus of Figure 1.
Dans une version préférée de l'invention (figure 1) l'appareil comporte un fer à repasser à vapeur 1 muni d'une commande de vapeur 11 et relié par un cordon comprenant un tube de liaison 2 à un générateur de vapeur 3 représenté par un cadre en trait mixte sur le schéma. Le générateur 3 comprend un réservoir d'eau 31 , une pompe 32, un bouilleur 33 muni de son élément chauffant 331 et de sa régulation non représentée, une électrovanne 34 et une cartouche 35 contenant des granulés d'une résine déminéralisante. L'eau du réservoir peut s'écouler dans une conduite 40 à travers la cartouche 35 qui en constitue un prolongement. La conduite 40 se termine par un distributeur 41 d'où partent tous les circuits hydrauliques. La pompe 32 reliée au distributeur 41 par une conduite 320 injecte l'eau par la conduite 321 dans le bouilleur 33. La vapeur issue du bouilleur 33 s'en échappe par la conduite 332 vers le tube de liaison 2 pour alimenter le fer 1. L'électrovanne 34 est reliée par des conduites d'une part au distributeur 41 et d'autre part à l'entrée d'eau du bouilleur 33 sur la conduite 321.In a preferred version of the invention (FIG. 1) the appliance comprises a steam iron 1 provided with a steam control 11 and connected by a cord comprising a connecting tube 2 to a steam generator 3 represented by a dashed line frame on the diagram. The generator 3 comprises a water tank 31, a pump 32, a boiler 33 provided with its heating element 331 and its regulation not shown, a solenoid valve 34 and a cartridge 35 containing granules of a demineralizing resin. The water in the reservoir can flow in a line 40 through the cartridge 35 which constitutes an extension. Line 40 ends with a distributor 41 from which all the hydraulic circuits start. The pump 32 connected to the distributor 41 by a line 320 injects the water through the line 321 in the boiler 33. The steam from the boiler 33 escapes therefrom via the pipe 332 to the connection tube 2 to supply the iron 1. The solenoid valve 34 is connected by pipes on the one hand to the distributor 41 and d on the other hand at the water inlet of the boiler 33 on line 321.
De préférence l'électrovanne 34 au repos a son clapet maintenu sur son siège à rencontre de la pression dans la conduite 321 par un ressort taré. Une pompe 36 a son aspiration reliée au distributeur 41 et sa sortie reliée à la conduite 332.Preferably the solenoid valve 34 at rest has its valve held in its seat against the pressure in the pipe 321 by a calibrated spring. A pump 36 has its suction connected to the distributor 41 and its outlet connected to the pipe 332.
Lorsque la ménagère branche son appareil, les pompes 32 et 36 sont arrêtées et l'électrovanne 34 fermée . Le fer 1 et le bouilleur 33 s'échauffent à leurs températures de consignes. La ménagère peut alors repasser. Quand elle agit sur la commande 11 la pompe 32 se met en marche et aspire de l'eau du réservoir 31 à travers la cartouche 35, les conduites 40,41 ,320 et la refoule dans le bouilleur 33 par la conduite 321. Là l'eau s'étale en mouillant la surface chaude et bout. La vapeur sort du bouilleur 33 par la conduite 332 pour rejoindre le fer à repasser 1 à travers le tube de liaison 2. La pression dans le bouilleur est alors suffisante pour vaincre toutes les pertes de charge, spécialement celle du tube de liaison de petit diamètre et de grande longueur.When the housewife plugs in her appliance, the pumps 32 and 36 are stopped and the solenoid valve 34 closed. The iron 1 and the boiler 33 heat up to their set temperatures. The housewife can then iron. When it acts on the control 11 the pump 32 starts up and draws water from the reservoir 31 through the cartridge 35, the pipes 40, 41, 320 and discharges it into the boiler 33 via the pipe 321. There the water spreads by wetting the hot surface and boiling. The steam comes out of the boiler 33 via line 332 to reach the iron 1 through the connection tube 2. The pressure in the boiler is then sufficient to overcome all the pressure drops, especially that of the small diameter connection tube and very long.
Simultanément on peut activer la pompe 36 qui fournit un petit débit d'eau supplémentaire, lequel se mélange à la vapeur dans la conduite 332 et l'humidifie. Si la pression s'élève exagérément par exemple par suite d'un pincement du tube de liaison 2 le clapet de l'électrovanne se soulève et provoque une fuite vers le réservoir, ce qui a pour effet de limiter la pression à la valeur correspondant au tarage du ressort.Simultaneously, pump 36 can be activated, which provides a small additional flow of water, which mixes with steam in line 332 and humidifies it. If the pressure rises excessively, for example due to a pinching of the connection tube 2, the valve of the solenoid valve lifts and causes a leak towards the tank, which has the effect of limiting the pressure to the value corresponding to the spring setting.
Lorsque la commande de vapeur 11 cesse d'être actionnée les pompes 32 et 36 s'arrêtent et l'électrovanne 34 s'ouvre mettant en communication le bouilleur 33 et le réservoir 31 à travers la cartouche 35 et les conduites 321 ,41 ,40. L'eau résiduelle contenue dans le bouilleur continue à produire de la vapeur. Sous l'action de la pression de vapeur celle ci refoule l'eau des conduites 321 ,41 ,40 jusqu'au réservoir à travers la cartouche 35 et la vapeur suit le même chemin avec un fort débit parce que les pertes de charge sont faibles, le circuit étant court et de bonne section. Les produits contenus dans la cartouche 35 se trouvent refoulés et fortement agités ce qui homogénéise le lit de traitement et la vapeur cesse d'emprunter la conduite 332. Le fer se trouve immédiatement privé de vapeur. Tant que la commande 11 n'est pas actionnée, l'électrovanne 34 peut rester ouverte, mais elle doit le rester au moins temporairement le temps que l'eau résiduelle du bouilleur soit évaporée et la surface asséchée.When the steam control 11 ceases to be actuated the pumps 32 and 36 stop and the solenoid valve 34 opens putting in communication the boiler 33 and the tank 31 through the cartridge 35 and the lines 321, 41, 40 . The residual water in the boiler continues to produce steam. Under the action of the vapor pressure, this discharges the water from the pipes 321, 41, 40 to the reservoir through the cartridge 35 and the vapor follows the same path with a high flow rate because the pressure drops are low , the circuit being short and of good cross-section. The products contained in the cartridge 35 are driven back and strongly agitated which homogenizes the treatment bed and the steam ceases to borrow the line 332. The iron is immediately deprived of steam. As long as the control 11 is not actuated, the solenoid valve 34 can remain open, but it must remain so at least temporarily until the residual water from the boiler is evaporated and the surface dried.
Dans une autre version (figure 2) ne comprenant pas de circuit humidificateur la cartouche de traitement 35 est placée le long de la conduite 333 entre le bouilleur et le piquage sur la conduite 321 reliant la pompe 32 et l'électrovanne 34. Le fonctionnement est tout à fait semblable à celui de la version précédente. Le débit de purge passe du bouilleur 33 à la cartouche 35 tandis que le débit d'eau passe de la pompe 32 à la cartouche 35 et au bouilleur 33 par la même conduite 321 ,333 commune aux deux circuits.In another version (FIG. 2) not comprising a humidifier circuit, the treatment cartridge 35 is placed along the line 333 between the boiler and the nozzle on the line 321 connecting the pump 32 and the solenoid valve 34. Operation is quite similar to that of the previous version. The purge flow passes from the boiler 33 to the cartridge 35 while the water flow passes from the pump 32 to the cartridge 35 and to the boiler 33 by the same line 321, 333 common to the two circuits.
Dans une autre version dérivée de la première (figure 3) l'électrovanne 34 est reliée par des conduites d'une part au distributeur 41 et d'autre part à la sortie de vapeur du bouilleur 33 sur la conduite 332. Dans cette version le fonctionnement est semblable à celui de la version précédente mais la purge du tuyau de liaison (2) est plus rapide. In another version derived from the first (Figure 3) the solenoid valve 34 is connected by pipes on the one hand to the distributor 41 and on the other hand to the steam outlet of the boiler 33 on the pipe 332. In this version the operation is similar to that of the previous version but the purging of the connecting pipe (2) is faster.

Claims

REVENDICATIONS
1 ) Générateur de vapeur où l'eau s'évapore de façon quasi instantanée pendant une période d'utilisation de la vapeur et prévu pour alimenter un appareil électrodomestique (1) via un tube de liaison (2) et comprenant en série un réservoir d'eau (31), une pompe (32), un bouilleur (33) muni de son élément chauffant (331) et de sa régulation, caractérisé en ce qu'il comprend des moyens de purge (34) à la pression atmosphérique du bouilleur (33) et du circuit de débit de vapeur (332,2) qui s'activent en fin de période d'utilisation de la vapeur.1) Steam generator where the water evaporates almost instantaneously during a period of use of the steam and intended to supply an electrical household appliance (1) via a connection tube (2) and comprising in series a reservoir d water (31), a pump (32), a boiler (33) provided with its heating element (331) and its regulation, characterized in that it comprises purging means (34) at atmospheric pressure of the boiler (33) and the steam flow circuit (332,2) which are activated at the end of the period of steam use.
2) Générateur de vapeur selon la revendication 1 caractérisé en ce que les moyens de purge opposent au débit de vapeur une perte de charge inférieure à celle du tube de liaison (2) et de l'appareil utilisateur (1).2) Steam generator according to claim 1 characterized in that the purging means oppose the steam flow a pressure drop lower than that of the connecting tube (2) and the user device (1).
3) Générateur de vapeur selon l'une des revendications 1 ou 2 caractérisé en ce que le débit de purge est dirigé dans le réservoir d'eau (31) à pression atmosphérique du générateur par un élément de circuit (40) commun au circuit d'eau allant du réservoir au bouilleur en passant par la pompe (32).3) Steam generator according to one of claims 1 or 2 characterized in that the purge flow is directed into the water tank (31) at atmospheric pressure of the generator by a circuit element (40) common to the circuit d water from the tank to the boiler passing through the pump (32).
4) Générateur de vapeur selon l'une des revendications 1 à 3 caractérisé en ce que les moyens de purge comprennent une électrovanne (34) ouvrant le circuit de purge en fin d'utilisation de la vapeur, au moins pour un temps prédéterminé pendant l'arrêt d'utilisation.4) Steam generator according to one of claims 1 to 3 characterized in that the purging means comprise a solenoid valve (34) opening the purge circuit at the end of use of the steam, at least for a predetermined time during l '' stop use.
5) Générateur de vapeur selon la revendication 4 caractérisé en ce que l'électrovanne (34) constitue un organe de sécurité contre une surpression dans le circuit de vapeur.5) Steam generator according to claim 4 characterized in that the solenoid valve (34) constitutes a safety device against overpressure in the steam circuit.
6) Générateur de vapeur selon l'une des revendications 1 à 5 caractérisé en ce qu'il comporte un moyen (35) de traitement de l'eau et en ce que le débit de purge traverse ce moyen de traitement de l'eau à contre courant.6) Steam generator according to one of claims 1 to 5 characterized in that it comprises a means (35) for treating the water and in that the purge flow passes through this means for treating the water at against the current.
7) Générateur de vapeur selon la revendication 6 caractérisé en ce que le moyen de traitement de l'eau (35) est situé le long ou dans le prolongement de l'élément de circuit (40) commun à la purge et au circuit d'eau pompée.7) Steam generator according to claim 6 characterized in that the water treatment means (35) is located along or in the extension of the element circuit (40) common to the purge and the pumped water circuit.
8) Générateur de vapeur selon l'une des revendications 6 ou 7 caractérisé en ce que le moyen de traitement de l'eau comprend un produit de traitement solide divisé en granulés ou pulvérulent.8) Steam generator according to one of claims 6 or 7 characterized in that the water treatment means comprises a solid treatment product divided into granules or powder.
9) Générateur de vapeur selon la revendication 8 caractérisé en ce que le produit de traitement de l'eau est une résine anti tartre.9) Steam generator according to claim 8 characterized in that the water treatment product is an anti-scale resin.
10) Générateur de vapeur selon l'une des revendications 1 à 9 caractérisé en ce que le générateur comporte un circuit d'humidification de la vapeur (36) reliant le circuit d'eau (40,41 ) au circuit de vapeur (332,2) au travers d'une pompe (36). 10) Steam generator according to one of claims 1 to 9 characterized in that the generator comprises a steam humidification circuit (36) connecting the water circuit (40,41) to the steam circuit (332, 2) through a pump (36).
PCT/IB1999/001932 1998-11-17 1999-11-11 Steam generator with fast bleeding WO2000029787A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19983757T DE19983757T1 (en) 1998-11-17 1999-11-11 Steam generator with quick ventilation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR98/14587 1998-11-17
FR9814587A FR2785975B1 (en) 1998-11-17 1998-11-17 FAST PURGE STEAM GENERATOR

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WO2000029787A1 true WO2000029787A1 (en) 2000-05-25

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US10786749B2 (en) 2015-09-28 2020-09-29 Commissariat A L'energie Atomique Et Aux Energies Device for converting a liquid into vapour and associated method for regulating a heating power
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ES2711724T3 (en) 2016-07-15 2019-05-07 Compania Espanola De Electromenaje Sa Ironing station with several steam flows
EP3269873B1 (en) 2016-07-15 2018-12-12 Compania Espanola de Electromenaje, SA Ironing station with various steam levels
CN114251637A (en) * 2020-09-21 2022-03-29 广东美的环境电器制造有限公司 Steam generating device, control method, electric appliance and readable storage medium
CN114251638B (en) * 2020-09-21 2023-12-12 广东美的环境电器制造有限公司 Steam generating device, control method, electric apparatus, and readable storage medium

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US10786749B2 (en) 2015-09-28 2020-09-29 Commissariat A L'energie Atomique Et Aux Energies Device for converting a liquid into vapour and associated method for regulating a heating power
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FR2785975A1 (en) 2000-05-19
DE19983757T1 (en) 2002-09-26

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