EP0454048A2 - Steam iron - Google Patents

Steam iron Download PDF

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Publication number
EP0454048A2
EP0454048A2 EP91106505A EP91106505A EP0454048A2 EP 0454048 A2 EP0454048 A2 EP 0454048A2 EP 91106505 A EP91106505 A EP 91106505A EP 91106505 A EP91106505 A EP 91106505A EP 0454048 A2 EP0454048 A2 EP 0454048A2
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EP
European Patent Office
Prior art keywords
evaporator chamber
valve
steam iron
sealing body
water tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91106505A
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German (de)
French (fr)
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EP0454048B1 (en
EP0454048A3 (en
Inventor
Udo Halbach
Heinz Ohlsen
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Robert Krups GmbH and Co KG
Original Assignee
Robert Krups GmbH and Co KG
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Publication date
Application filed by Robert Krups GmbH and Co KG filed Critical Robert Krups GmbH and Co KG
Publication of EP0454048A2 publication Critical patent/EP0454048A2/en
Publication of EP0454048A3 publication Critical patent/EP0454048A3/en
Application granted granted Critical
Publication of EP0454048B1 publication Critical patent/EP0454048B1/en
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    • 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
    • D06F75/14—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron
    • D06F75/18—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron the water being fed slowly, e.g. drop by drop, from the reservoir to a steam generator

Definitions

  • the invention relates to a steam iron with an electrically heatable sole plate having an evaporator chamber, a handle arranged at a distance above it and integrated in a housing and with a water tank arranged above the sole plate, from which water can be supplied to the evaporator chamber via an adjustable drip valve at the bottom of the water tank.
  • the drip valve comprises a spring-loaded valve needle which, in the closed position, engages in a valve seat projecting into the evaporator chamber.
  • the object of the present invention is to improve a steam iron of the type mentioned in such a way that irrespective of the setting of the drip valve, the supply of water to the steam chamber is automatically prevented if the temperature of the soleplate in the region of the evaporator chamber for a complete evaporation of the amount of water supplied is no longer sufficient.
  • valve seat can be shut off independently of the valve needle by a sealing body held on the soleplate and supported by a temperature-controlled memory adjusting element in the closing direction.
  • the memory adjusting element used to actuate the sealing body is distinguished by its shape memory alloy, which undergoes a temperature-dependent, reversible change in shape due to a thermoelastic martensitic conversion.
  • the property inherent in the memory control element can be used to transfer the sealing body into a closed position if the temperature of the soleplate in the area of the steam chamber drops to such an extent that evaporation of the amount of water introduced is no longer entirely possible.
  • the valve seat advantageously projects into an opening with a radial outer spacing in the cover part of the evaporator chamber, this opening also being closable by the sealing body if the sole temperature is too low.
  • a manually operable metering pump is used to supply an additional amount of water to the evaporator chamber via a pressure line.
  • a return line with a self-closing pressure relief valve is switched between the pressure line and the evaporator chamber, so that when the dosing pump is closed Sealing body the amount of water expelled from the metering pump can be returned to the water tank.
  • This return line is advantageously formed by a circulation insert arranged above the evaporator chamber, which connects the pressure line to an opening in the bottom of the water tank, this opening being covered by an elastic bell which forms the pressure relief valve and is held on the bottom of the water tank.
  • valve seat enclosed by the cover part of the evaporator chamber advantageously protrudes with an annular lip into the evaporator chamber, the sealing body advantageously engaging in the shut-off position with a pin in the annular lip for sealing the evaporator chamber.
  • the memory actuating element as a memory compression spring.
  • the sole plate preferably for guiding and better transfer of the heat from the sole plate to the memory spring, likes a pin which projects into the evaporator chamber and is arranged centrally to the valve seat have, which is encompassed by the memory compression spring.
  • the memory compression spring may be encompassed by an annular collar protruding from the soleplate, on which the sealing body is in turn fixed. The sealing body may have a stop bead corresponding to the pin of the soleplate.
  • the steam iron has an electrically heatable sole plate 10, above which a cover part 12 is arranged, which together with the sole plate 10 forms an evaporator chamber 11, from which known, not shown steam guide channels branch, through which the steam formed in the evaporator chamber known outlet openings in the Sole plate 10 is supplied.
  • a cover 14 fastened to the sole plate via intermediate pieces 13, which carries a water tank 15 which is traversed by a manually controllable drip valve 16, which in turn engages in a water collecting bowl 17 connected to the water tank 15.
  • This water collecting bowl 17 has an outlet opening 18 on the underside, in which a valve seat 19 designed as a funnel-shaped sleeve is arranged, in which the adjustable valve needle 20 of the drip valve 16 can engage on the one hand to form a more or less large opening or on the other hand to close it.
  • the valve needle 20 itself can be operated in various ways in a known manner.
  • a control cam 22 at the front end of the handle part 21, which can act by means of a transmission lever 23 on the actuating end of the valve needle 20 which is loaded by a return spring 24 in the opening direction.
  • a push lever 26 acts on the end 25 loaded by a return spring 24 in the opening direction of the valve needle 20, the actuating arm 27 of which is guided on the one hand in the grip part 21 and projects out of the latter for adjustment.
  • the steam iron shown in FIG. 1 has, in addition to a pump 28 for a spray nozzle 29 which can be actuated manually in a known manner by means of a push button 30, a further one arranged next to the pump 28 with the latter Pump 28 with another metering pump that is approximately identical in structure and is connected to the evaporator chamber 11 via a pressure line 31.
  • This pressure line 31 is on the one hand through the water tank 15 itself and also out of the water tank 17 forming an underbody of the water tank and connected to a return line 32 which on the one hand leaves a path to the evaporator chamber 11 and on the other hand flows back into the water tank via a pressure relief valve 33.
  • This return line is - as can best be seen from FIG.
  • this pressure relief valve 33 is formed from a self-sealing, elastic bell 39 held at the bottom of the water collecting tray 17.
  • the valve seat 19 can be closed by a sealing body 41 arranged in the evaporator chamber 11 and acted upon by a memory adjusting element 40.
  • the memory actuator is a memory compression spring formed on the one hand on the sole plate 10 and on the other hand on the sealing body 41. At a temperature of more than about 100 ° C, the memory compression spring deforms such that the sealing body 41 is held in the open position shown in FIG. 2. When the soleplate in the area of the memory spring cools below 100 ° C., this memory spring 40 deforms in such a way that the sealing body 41 closes the valve seat 19, as shown in FIGS. 1 and 5. In the steam iron shown in FIGS.
  • the sealing body 41 is designed such that, in addition to the valve seat 19, the opening 36 in the cover part 12 of the evaporator chamber 11, which surrounds this at a radial distance, is closed if the temperature of the soleplate drops below a value , which no longer permits perfect evaporation of the water entering the evaporator chamber.
  • the sealing body 41 As a function of the temperature-dependent opening path of the memory compression spring 40, there is a temperature-dependent control of the amount of water that can be supplied to the evaporator chamber 11.
  • the valve seat 19 protrudes into the evaporator chamber 11 with an annular lip 42.
  • the sealing body 41 of the embodiment according to FIG. 5 has on its outer side a centrally arranged pin 43 which engages in a sealing manner in the ring lip 42 in the closed position.
  • the memory compression spring 40 can be fixed to the sole plate 10 in another way, in both embodiments the sole plate 10 is provided with a pin 44 projecting therefrom and arranged centrally to the valve seat 19, which is encompassed by the memory spring 40. Concentric to this pin 44, an annular collar 45 protrudes from the sole plate 10 at a distance from the pin 44, which on the one hand encompasses the memory compression spring 40 and on the other hand the fastening of the sealing body 41 serves.
  • the sealing body 41 has an inside abutment bead 46 which can be supported on the end face of the pin 44 in the open position of the sealing body 41.
  • the pin 43 can be designed, for example, as a truncated cone to optimize the temperature-dependent regulation of the amount of water directed to the evaporator chamber 11 and can be brought into engagement with a correspondingly tapered bore in the annular lip 42 of the valve seat 19, as can be seen from FIG. 5.
  • other designs of the annular lip 42 and sealing body 41 are also conceivable.

Abstract

The steam iron is equipped with an electrically heatable soleplate which has an evaporator chamber. Arranged at a distance above this is a handle integrated into a housing, and above the soleplate there is a water tank arranged in the housing. From this water tank, which has an adjustable drip valve at the bottom, water can be supplied to the evaporator chamber via the drip valve which comprises a spring-loaded valve needle, the valve needle engaging in closed position in a valve seat which projects into the evaporator chamber. In order, with the drip valve completely open, to prevent the evaporator chamber cooling down to such an extent that the water passing into the evaporator chamber is not in every case completely evaporated, the valve seat can be closed off irrespectively of the position of the valve needle by a sealing member which is mounted on the soleplate and supported in the closing direction by a temperature-controlled memory actuating element. <IMAGE>

Description

Die Erfindung betrifft ein Dampfbügeleisen mit einer elektrisch beheizbaren, eine Verdampferkammer aufweisenden Sohlenplatte, einem abstandsweise darüber angeordneten, in ein Gehäuse integrierten Handgriff und mit einem über der Sohlenplatte angeordneten Wassertank, aus dem über ein einstellbares Tropfventil am Boden des Wassertanks der Verdampferkammer Wasser zuführbar ist, wobei das Tropfventil eine federbelastete Ventilnadel umfaßt, die in Schließstellung in einen in die Verdampferkammer einragenden Ventilsitz eingreift.The invention relates to a steam iron with an electrically heatable sole plate having an evaporator chamber, a handle arranged at a distance above it and integrated in a housing and with a water tank arranged above the sole plate, from which water can be supplied to the evaporator chamber via an adjustable drip valve at the bottom of the water tank. wherein the drip valve comprises a spring-loaded valve needle which, in the closed position, engages in a valve seat projecting into the evaporator chamber.

Bei einem vorbekannten Dampfbügeleisen der eingangs genannten Art gemäß DE 34 24 743 A1 ist eine Regelung der in die Dampfkammer tropfenden Wassermenge nur mittels der Einstellung des Tropfventiles möglich. Außerdem besitzt dieses vorbekannte Dampfbügeleisen eine manuell einstellbare thermostatische Temperaturregelung des Heizers, so daß eine Fehlbedienung des Dampfbügeleisens insofern möglich ist, als daß bei zur Verdampfung geringstmöglicher Heizleistung die größtmögliche Wassermenge der Verdampferkammer zugeführt werden kann. Dadurch ist es möglich, daß die Sohlenplatte im Bereich der Verdampferkammer so stark abkühlt, daß bei maximaler Wasserzuführung in die Verdampferkammer dieses nicht mehr vollständig verdampft, so daß Wasserreste unverdampft aus der Sohlenplatte des Dampfbügeleisens austreten.In a previously known steam iron of the type mentioned in DE 34 24 743 A1, regulation of the amount of water dripping into the steam chamber is only possible by adjusting the drip valve. In addition, this known steam iron has a manually adjustable thermostatic temperature control of the heater, so that incorrect operation of the steam iron is possible in that the greatest possible amount of water can be supplied to the evaporator chamber with the lowest possible heating power for evaporation. This makes it possible for the soleplate to cool down so much in the area of the evaporator chamber that with maximum water supply into the evaporator chamber this no longer evaporates completely, so that water residues emerge unevaporated from the soleplate of the steam iron.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein Dampfbügeleisen der eingangs genannten Art dahingehend zu verbessern, daß unabhängig von der Einstellage des Tropfventiles die Zufuhr von Wasser in die Dampfkammer automatisch unterbunden wird, falls die Temperatur der Bügeleisensohle im Bereich der Verdampferkammer für eine vollständige Verdampfung der zugeführten Wassermenge nicht mehr ausreicht.The object of the present invention is to improve a steam iron of the type mentioned in such a way that irrespective of the setting of the drip valve, the supply of water to the steam chamber is automatically prevented if the temperature of the soleplate in the region of the evaporator chamber for a complete evaporation of the amount of water supplied is no longer sufficient.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß der Ventilsitz durch einen an der Sohlenplatte gehalterten, von einem temperaturgesteuerten Memory-Stellelement im Schließsinn gestützten Dichtkörper unabhängig von der Ventilnadel absperrbar ist. Das zur Betätigung des Dichtkörpers verwendete Memory-Stellelement zeichnet sich durch seine Formgedächtnis-Legierung aus, die aufgrund einer thermoelastischen martensitischen Umwandlung eine temperaturabhängige, reversible Gestaltsänderung erfährt. Die dem Memory-Stellelement innewohnende Eigenschaft läßt sich nutzen, um den Dichtkörper in eine Schließlage zu überführen, falls die Temperatur der Sohlenplatte im Bereich der Dampfkammer soweit abfällt, daß eine Verdampfung der eingeleiteten Wassermenge nicht mehr restlos möglich ist. Die anschließend infolge der Beheizung der Sohlenplatte wieder ansteigende Temperatur im Bereich der Dampfkammer führt zu einer erneuten Öffnung des Dichtkörpers, so daß erneut Wasser in die Dampfkammer gelangen kann. Dabei versteht es sich, daß während der Bewegungsphase des Dichtkörpers infolge der temperaturabhängigen Bewegung des Memory-Stellelementes auch die Mange des der Dampfkammer zufließenden Wassers veränderbar ist, so daß eine temperaturabhängige Regelung der Wasserzuführung ermöglicht wird, die durch entsprechende Formgebung des Ventilsitzes und Dichtkörpers optimierbar ist. Um bei in Offenstellung befindlichem Dichtkörper im Bedarfsfall auch einen Dampfstoß erzeugen zu können, ragt vorteilhaft der Ventilsitz mit radialem Außenabstand in eine Öffnung im Deckelteil der Verdampferkammer ein, wobei auch diese Öffnung vom Dichtkörper bei zu niedriger Sohlentemperatur verschließbar ist. Um eine zusätzliche Wassermenge zur Erzeugung des Dampfstoßes in die Verdampferkammer einbringen zu können, wird eine manuell betätigbare Dosierpumpe benutzt, um über eine Druckleitung der Verdampferkammer eine zusätzliche Wassermenge zuzuführen. Um jedoch bei in Schließlage,aufgrund abgesunkener Sohlentemperatur,befindlichem Dichtkörper zu verhindern, daß trotz Betätigung der Dosierpumpe eine zusätzliche Wassermenge in die Verdampferkammer gelangt, ist nach einem vorteilhaften Ausgestaltungsmerkmal der Erfindung zwischen Druckleitung und Verdampferkammer eine Rücklaufleitung mit einem selbstschließenden Überdruckventil geschaltet, wodurch bei geschlossenem Dichtkörper die von der Dosierpumpe ausgestoßene Wassermenge in den Wassertank rückführbar ist. Dabei ist diese Rücklaufleitung vorteilhaft durch einen über der Verdampferkammer angeordneten Umlaufeinsatz gebildet, der die Druckleitung mit einem Durchbruch im Boden des Wassertanks verbindet, wobei dieser Durchbruch von einer das Überdruckventil bildenden, am Boden des Wassertanks gehalterten elastischen Glocke abgedeckt ist.This object is achieved in that the valve seat can be shut off independently of the valve needle by a sealing body held on the soleplate and supported by a temperature-controlled memory adjusting element in the closing direction. The memory adjusting element used to actuate the sealing body is distinguished by its shape memory alloy, which undergoes a temperature-dependent, reversible change in shape due to a thermoelastic martensitic conversion. The property inherent in the memory control element can be used to transfer the sealing body into a closed position if the temperature of the soleplate in the area of the steam chamber drops to such an extent that evaporation of the amount of water introduced is no longer entirely possible. The subsequently rising temperature in the area of the steam chamber as a result of the heating of the soleplate leads to a renewed opening of the sealing body, so that water can get into the steam chamber again. It is understood that the amount of water flowing into the steam chamber can also be changed during the movement phase of the sealing body due to the temperature-dependent movement of the memory adjusting element, so that temperature-dependent control of the water supply is made possible, which can be optimized by appropriate shaping of the valve seat and sealing body . In order to be able to generate a burst of steam when the sealing body is in the open position, the valve seat advantageously projects into an opening with a radial outer spacing in the cover part of the evaporator chamber, this opening also being closable by the sealing body if the sole temperature is too low. In order to be able to introduce an additional amount of water to generate the burst of steam into the evaporator chamber, a manually operable metering pump is used to supply an additional amount of water to the evaporator chamber via a pressure line. However, in order to prevent an additional amount of water from entering the evaporator chamber despite actuation of the metering pump when the sealing body is in the closed position due to the lower sole temperature, a return line with a self-closing pressure relief valve is switched between the pressure line and the evaporator chamber, so that when the dosing pump is closed Sealing body the amount of water expelled from the metering pump can be returned to the water tank. This return line is advantageously formed by a circulation insert arranged above the evaporator chamber, which connects the pressure line to an opening in the bottom of the water tank, this opening being covered by an elastic bell which forms the pressure relief valve and is held on the bottom of the water tank.

Bei einer Ausführungsform eines Dampfbügeleisens, mit der sich kein Dampfstoß erzeugen läßt, ragt der vom Deckelteil der Verdampferkammer umschlossene Ventilsitz vorteilhaft mit einer Ringlippe in die Verdampferkammer ein, wobei der Dichtkörper in Absperrlage vorteilhaft mit einem Zapfen in die Ringlippe zur Abdichtung der Verdampferkammer eingreift.In one embodiment of a steam iron, with which no steam blast can be generated, the valve seat enclosed by the cover part of the evaporator chamber advantageously protrudes with an annular lip into the evaporator chamber, the sealing body advantageously engaging in the shut-off position with a pin in the annular lip for sealing the evaporator chamber.

Es ist denkbar, als Memory- Stellelement verschiedenartige Ausführungen einer Memory-Feder zu verwenden. Es ist jedoch vorteilhaft, das Memory-Stellelement als Memory-Druckfeder auszubilden. Dabei mag die Sohlenplatte vorzugsweise zur Führung und besseren Übertragung der Wärme von der Sohlenplatte auf die Memory-Feder einen in die Verdampferkammer aufragenden, zentrisch zum Ventilsitz angeordneten Zapfen aufweisen, der von der Memory-Druckfeder umgriffen ist. Außerdem mag zum Schutz dieser Memory-Druckfeder,insbesondere gegen das in die Verdampferkammer gelangende Wasser, die Memory-Druckfeder von einem aus der Sohlenplatte aufragenden Ringkragen umgriffen sein, an dem der Dichtkörper seinerseits festgelegt ist. Dabei mag der Dichtkörper einen mit dem Zapfen der Sohlenplatte korrespondierenden Anschlagwulst aufweisen.It is conceivable to use different designs of a memory spring as the memory adjusting element. However, it is advantageous to design the memory actuating element as a memory compression spring. In this case, the sole plate, preferably for guiding and better transfer of the heat from the sole plate to the memory spring, likes a pin which projects into the evaporator chamber and is arranged centrally to the valve seat have, which is encompassed by the memory compression spring. In addition, in order to protect this memory compression spring, in particular against the water entering the evaporator chamber, the memory compression spring may be encompassed by an annular collar protruding from the soleplate, on which the sealing body is in turn fixed. The sealing body may have a stop bead corresponding to the pin of the soleplate.

Die Erfindung ist in Ausführungsbeispielen auf der Zeichnung dargestellt und wird nachfolgend näher erläutert. Es zeigen:

Fig. 1
das erfindungsgemäße Dampfbügeleisen in einer im Teilschnitt dargestellten Seitenansicht,
Fig. 2
den das Tropfventil und den Dichtkörper aufweisenden Bereich der Verdampferkammer des aus Fig. 1 ersichtlichen Bügeleisens in einer gegenüber Fig. 1 vergrößerten Darstellung,
Fig. 3
den das Tropfventil enthaltenden Bodeneinsatz des Wassertanks in einer im Schnitt dargestellten Draufsicht nach der Linie III - III von Fig. 2,
Fig. 4
den eine Rücklaufleitung bildenden Umlaufeinsatz am Boden des Wassertanks in einem Horizontalschnitt nach der Linie IV - IV von Fig. 2,
Fig. 5
den Tropfventilbereich einer anderen Ausführungsform eines Dampfbügeleisens in einem ausgebrochenen Vertikalschnitt.
The invention is illustrated in exemplary embodiments on the drawing and is explained in more detail below. Show it:
Fig. 1
the steam iron according to the invention in a side view shown in partial section,
Fig. 2
the area of the evaporator chamber of the iron shown in FIG. 1, which has the drip valve and the sealing body, in an enlarged view compared to FIG. 1,
Fig. 3
the bottom insert of the water tank containing the drip valve in a plan view shown in section along the line III - III of Fig. 2,
Fig. 4
the circulation insert forming a return line at the bottom of the water tank in a horizontal section along the line IV - IV of Fig. 2,
Fig. 5
the drip valve area of another embodiment of a steam iron in a broken vertical section.

Das Dampfbügeleisen weist eine elektrisch beheizbare Sohlenplatte 10 auf, über welcher ein Deckelteil 12 angeordnet ist, das zusammen mit der Sohlenplatte 10 eine Verdampferkammer 11 bildet, von welcher bekannte, nicht dargestellte Dampfleitkanäle abzweigen, durch welche der in der Verdampferkammer gebildete Dampf bekannten Auslaßöffnungen in der Sohlenplatte 10 zugeführt wird. Oberhalb des Deckelteiles 12 befindet sich eine an der Sohlenplatte über Zwischenstücke 13 befestigte Abdeckhaube 14, die einen Wassertank 15 trägt, welcher von einem manuell steuerbaren Tropfventil 16 durchquert wird, das seinerseits in eine mit dem Wassertank 15 in Verbindung stehende Wassersammelschale 17 eingreift. Diese Wassersammelschale 17 weist unterseitig eine Austrittsöffnung 18 auf, in welcher ein als trichterförmige Hülse ausgebildeter Ventilsitz 19 angeordnet ist, in welchen die stellbare Ventilnadel 20 des Tropfventiles 16 zur Bildung einer mehr oder weniger großen Öffnung einerseits oder zur Verschließung andererseites eingreifen kann. Die Ventilnadel 20 selbst kann verschiedenartig in bekannter Weise betätigt werden. Bei dem aus Fig. 1 ersichtlichen Ausführungsbeispiel befindet sich am Vorderende des Griffteiles 21 ein Stellnocken 22, der mittels eines Übertragungshebels 23 auf das durch eine Rückstellfeder 24 im Öffnungssinne belastete Stellende der Ventilnadel 20 im Schließsinne einwirken kann. Bei dem aus Fig. 5 ersichtlichen Ausführungsbeispiel greift am durch eine Rückstellfeder 24 im Öffnungssinne der Ventilnadel 20 belasteten Stellende 25 ein Schubhebel 26 an, dessen Betätigungsarm 27 einerseits im Griffteil 21 geführt ist und aus diesem zur Verstellung vorragt.The steam iron has an electrically heatable sole plate 10, above which a cover part 12 is arranged, which together with the sole plate 10 forms an evaporator chamber 11, from which known, not shown steam guide channels branch, through which the steam formed in the evaporator chamber known outlet openings in the Sole plate 10 is supplied. Above the cover part 12 there is a cover 14 fastened to the sole plate via intermediate pieces 13, which carries a water tank 15 which is traversed by a manually controllable drip valve 16, which in turn engages in a water collecting bowl 17 connected to the water tank 15. This water collecting bowl 17 has an outlet opening 18 on the underside, in which a valve seat 19 designed as a funnel-shaped sleeve is arranged, in which the adjustable valve needle 20 of the drip valve 16 can engage on the one hand to form a more or less large opening or on the other hand to close it. The valve needle 20 itself can be operated in various ways in a known manner. In the embodiment shown in FIG. 1 there is a control cam 22 at the front end of the handle part 21, which can act by means of a transmission lever 23 on the actuating end of the valve needle 20 which is loaded by a return spring 24 in the opening direction. In the embodiment shown in FIG. 5, a push lever 26 acts on the end 25 loaded by a return spring 24 in the opening direction of the valve needle 20, the actuating arm 27 of which is guided on the one hand in the grip part 21 and projects out of the latter for adjustment.

Im Gegensatz zu der aus Fig. 5 ersichtlichen Ausführungsform besitzt das aus Fig. 1 ersichtliche Dampfbügeleisen außer einer durch eine manuell mittels einem Druckknopf 30 in bekannter Weise betätigbare Pumpe 28 für eine Sprühdüse 29 eine weitere, neben der Pumpe 28 angeordnete, mit dieser Pumpe 28 im Aufbau etwa übereinstimmende weitere Dosierpumpe, die über eine Druckleitung 31 mit der Verdampferkammer 11 in Verbindung steht. Diese Druckleitung 31 ist einerseits durch den Wassertank 15 selbst und auch aus der einen Unterboden des Wassertanks bildenden Wassersammelschale 17 herausgeführt und an eine Rücklaufleitung 32 angeschlossen, die einerseits einen Weg zur Verdampferkammer 11 freiläßt und andererseits über ein Überdruckventil 33 in den Wassertank rückmündet. Diese Rücklaufleitung ist - wie am besten aus Fig. 2 entnommen werden kann - aus einem über der Verdampferkammer 11 angeordneten Umlaufeinsatz 34 gebildet, der in einen unter der Wassersammelschale 17 des Wassertanks 15 angeordneten Stützkörper 35 eingesetzt ist. Dieser Stützkörper 35 wird von dem Ventilsitz 19 durchdrungen, der seinerseits durch eine Öffnung 36 im Deckelteil 12 der Verdampferkammer 11 in diese vorragt. Der Ventilsitz 19 ist von einem Freiraum 37 des Stützkörpers 35 umgeben, welcher die Öffnung 36 mit der Rücklaufleitung 32 im Umlaufeinsatz 34 verbindet. Dadurch kann die aus der Druckleitung 31 austretende Wassermenge über einen Teilbereich der Rücklaufleitung 32 und den Freiraum 37 aus der Öffnung 36 in die Dampfkammer 11 gelangen. Andererseits kann bei Verschluß der Öffnung 36 die aus der Druckleitung 31 ausströmende Wassermenge über die Rücklaufleitung 32 und einen Durchbruch 38 im von der Wassersammelschale 17 gebildeten Unterboden des Wassertanks 15 in diesen über das Überdruckventil 33 zurückgelangen. Dieses Überdruckventil 33 ist bei dem aus den Fig. 1 und 2 ersichtlichen Ausführungsbeispiel aus einer am Boden der Wassersammelschale 17 gehalterten, selbstdichtenden, elastischen Glocke 39 gebildet.In contrast to the embodiment shown in FIG. 5, the steam iron shown in FIG. 1 has, in addition to a pump 28 for a spray nozzle 29 which can be actuated manually in a known manner by means of a push button 30, a further one arranged next to the pump 28 with the latter Pump 28 with another metering pump that is approximately identical in structure and is connected to the evaporator chamber 11 via a pressure line 31. This pressure line 31 is on the one hand through the water tank 15 itself and also out of the water tank 17 forming an underbody of the water tank and connected to a return line 32 which on the one hand leaves a path to the evaporator chamber 11 and on the other hand flows back into the water tank via a pressure relief valve 33. This return line is - as can best be seen from FIG. 2 - formed from a circulation insert 34 arranged above the evaporator chamber 11, which is inserted into a support body 35 arranged under the water collecting bowl 17 of the water tank 15. This support body 35 is penetrated by the valve seat 19, which in turn projects through an opening 36 in the cover part 12 of the evaporator chamber 11. The valve seat 19 is surrounded by a free space 37 of the support body 35, which connects the opening 36 to the return line 32 in the circulation insert 34. As a result, the amount of water emerging from the pressure line 31 can reach the steam chamber 11 via a partial area of the return line 32 and the free space 37 from the opening 36. On the other hand, when the opening 36 is closed, the amount of water flowing out of the pressure line 31 can return via the return line 32 and a breakthrough 38 in the underbody of the water tank 15 formed by the water collecting tray 17 via the pressure relief valve 33. In the exemplary embodiment shown in FIGS. 1 and 2, this pressure relief valve 33 is formed from a self-sealing, elastic bell 39 held at the bottom of the water collecting tray 17.

Der Ventilsitz 19 läßt sich in beiden Fällen durch einen in der Verdampferkammer 11 angeordneten und von einem Memory-Stellelement 40 beaufschlagten Dichtkörper 41 verschließen. Dabei ist das Memory-Stellelement als Memory-Druckfeder ausgebildet, die einerseits an der Sohlenplatte 10 und andererseits am Dichtkörper 41 gehaltert ist. Bei einer Temperatur von mehr als etwa 100° C verformt sich die Memory-Druckfeder dergestalt, daß der Dichtkörper 41 in der aus Fig. 2 ersichtlichen Öffnungslage gehaltert wird. Bei einer Abkühlung der Sohlenplatte im Bereich der Memory-Feder unter 100° C verformt sich diese Memory-Feder 40 in der Weise, daß der Dichtkörper 41 - wie in den Fig. 1 und 5 dargestellt - den Ventilsitz 19 verschließt. Bei dem aus den Fig. 1 und 2 ersichtlichen Dampfbügeleisen ist der Dichtkörper 41 derart ausgebildet, daß außer dem Ventilsitz 19 auch die diesen mit radialem Abstand umgreifende Öffnung 36 im Deckelteil 12 der Verdampferkammer 11 geschlossen ist, falls die Temperatur der Sohlenplatte unter einen Wert absinkt, der eine einwandfreie Verdampfung des in die Verdampferkammer eintretenden Wassers nicht mehr erlaubt. Während der Bewegungsphase des Dichtkörpers 41 in Abhängigkeit von dem temperaturbedingten Öffnungsweg der Memory-Druckfeder 40 ergibt sich eine temperaturabhängige Steuerung der der Verdampferkammer 11 zuführbaren Wassermenge.In both cases, the valve seat 19 can be closed by a sealing body 41 arranged in the evaporator chamber 11 and acted upon by a memory adjusting element 40. The memory actuator is a memory compression spring formed on the one hand on the sole plate 10 and on the other hand on the sealing body 41. At a temperature of more than about 100 ° C, the memory compression spring deforms such that the sealing body 41 is held in the open position shown in FIG. 2. When the soleplate in the area of the memory spring cools below 100 ° C., this memory spring 40 deforms in such a way that the sealing body 41 closes the valve seat 19, as shown in FIGS. 1 and 5. In the steam iron shown in FIGS. 1 and 2, the sealing body 41 is designed such that, in addition to the valve seat 19, the opening 36 in the cover part 12 of the evaporator chamber 11, which surrounds this at a radial distance, is closed if the temperature of the soleplate drops below a value , which no longer permits perfect evaporation of the water entering the evaporator chamber. During the movement phase of the sealing body 41 as a function of the temperature-dependent opening path of the memory compression spring 40, there is a temperature-dependent control of the amount of water that can be supplied to the evaporator chamber 11.

Bei dem aus Fig. 5 ersichtlichen Ausführungsbeispiel ragt der Ventilsitz 19 mit einer Ringlippe 42 in die Verdampferkammer 11 ein. Der Dichtkörper 41 der Ausführungsform nach Fig. 5 weist auf seiner Außenseite einen zentrisch angeordneten Zapfen 43 auf, der in Schließlage in die Ringlippe 42 abdichtend eingreift. Obschon die Memory-Druckfeder 40 auf andere Weise an der Sohlenplatte 10 festgelegt sein kann, ist bei beiden Ausführungsformen die Sohlenplatte 10 mit einem daraus aufragenden, zentrisch zum Ventilsitz 19 angeordneten Zapfen 44 versehen, der von der Memory-Feder 40 umgriffen ist. Konzentrisch zu diesem Zapfen 44 ragt aus der Sohlenplatte 10 mit Abstand zum Zapfen 44 ein Ringkragen 45 auf, welcher einerseits die Memory-Druckfeder 40 umgreift und andererseits der Befestigung des Dichtkörpers 41 dient. Die Dichtkörper 41 weisen einen innenseitigen Anschlagwulst 46 auf, der sich in Öffnungslage des Dichtkörpers 41 auf der Stirnfläche des Zapfens 44 abstützen kann. Der Zapfen 43 kann zur Optimierung der temperaturabhängigen Regelung der zur Verdampferkammer 11 geleiteten Wassermenge beispielsweise als Kegelstumpf ausgebildet sein und mit einer entsprechend kegeligen Bohrung in der Ringlippe 42 des Ventilsitzes 19 in Eingriff bringbar sein, wie dies aus Fig. 5 ersichtlich ist. Es sind aber auch andere Gestaltungen von Ringlippe 42 und Dichtkörper 41 denkbar.In the embodiment shown in FIG. 5, the valve seat 19 protrudes into the evaporator chamber 11 with an annular lip 42. The sealing body 41 of the embodiment according to FIG. 5 has on its outer side a centrally arranged pin 43 which engages in a sealing manner in the ring lip 42 in the closed position. Although the memory compression spring 40 can be fixed to the sole plate 10 in another way, in both embodiments the sole plate 10 is provided with a pin 44 projecting therefrom and arranged centrally to the valve seat 19, which is encompassed by the memory spring 40. Concentric to this pin 44, an annular collar 45 protrudes from the sole plate 10 at a distance from the pin 44, which on the one hand encompasses the memory compression spring 40 and on the other hand the fastening of the sealing body 41 serves. The sealing body 41 has an inside abutment bead 46 which can be supported on the end face of the pin 44 in the open position of the sealing body 41. The pin 43 can be designed, for example, as a truncated cone to optimize the temperature-dependent regulation of the amount of water directed to the evaporator chamber 11 and can be brought into engagement with a correspondingly tapered bore in the annular lip 42 of the valve seat 19, as can be seen from FIG. 5. However, other designs of the annular lip 42 and sealing body 41 are also conceivable.

Wie bereits erwähnt, geben die dargestellten Ausführungsformen den Erfindungsgegenstand lediglich beispielsweise wieder, der keinesfalls allein darauf beschränkt ist. Es sind vielmehr noch mancherlei Änderungen und andere Ausgestaltungen der Erfindung denkbar. Außerdem sind alle in der Beschreibung erwähnten und/oder in der Zeichnung dargestellten, neuen Merkmale erfindungswesentlich, auch wenn sie in den Ansprüchen nicht ausdrücklich beansprucht sind.As already mentioned, the illustrated embodiments merely represent the subject matter of the invention, for example, which is by no means limited to this. Rather, various changes and other configurations of the invention are conceivable. In addition, all the new features mentioned in the description and / or shown in the drawing are essential to the invention, even if they are not expressly claimed in the claims.

Bezugszeichenliste:Reference symbol list:

1010th
SohlenplatteSole plate
1111
VerdampferkammerEvaporator chamber
1212
DeckelteilCover part
1313
ZwischenstückSpacer
1414
AbdeckhaubeCover
1515
WassertankWater tank
1616
TropfventilDrip valve
1717th
WassersammelschaleWater collecting tray
1818th
AustrittsöffnungOutlet opening
1919th
VentilsitzValve seat
2020th
VentilnadelValve needle
2121
GriffteilHandle part
2222
StellnockenSetting cams
2323
ÜbertragungshebelTransmission lever
2424th
RückstellfederReturn spring
2525th
StellendePosed
2626
SchubhebelThrust lever
2727th
BetätigungsarmOperating arm
2828
Pumpepump
2929
SprühdüseSpray nozzle
3030th
DruckknopfPush button
3131
DruckleitungPressure line
3232
RücklaufleitungReturn line
3333
ÜberdruckventilPressure relief valve
3434
UmlaufeinsatzCirculation use
3535
StützkörperSupport body
3636
Öffnungopening
3737
Freiraumfree space
3838
Durchbruchbreakthrough
3939
GlockeBell jar
4040
Memory-Stellelement/Memory-DruckfederMemory actuator / memory compression spring
4141
DichtkörperSealing body
4242
RinglippeRing lip
4343
Zapfen, an 41Cones, at 41
4444
Zapfen, an 10Cones, on 10
4545
RingkragenRing collar
4646
AnschlagwulstStop bead

Claims (9)

Dampfbügeleisen mit einer elektrisch beheizbaren, eine Verdampferkammer aufweisenden Sohlenplatte, einem abstandsweise darüber angeordneten, in ein Gehäuse integrierten Handgriff und mit einem über der Sohlenplatte angeordneten Wassertank, aus dem über ein einstellbares Tropfventil am Boden des Wassertanks der Verdampferkammer Wasser zuführbar ist, wobei das Tropfventil eine federbelastete Ventilnadel umfaßt, die in Schließstellung in einen in die Verdampferkammer einragenden Ventilsitz eingreift,

dadurch gekennzeichnet,

daß der Ventilsitz (19) durch einen an der Sohlenplatte (10) gehalterten, von einem temperaturgesteuerten Memory-Stellelement (40) im Schließsinn gestützten Dichtkörper (41) unabhängig von der Ventilnadel (20) absperrbar ist.Steam iron with an electrically heated sole plate having an evaporator chamber, a handle arranged at a distance above it, integrated in a housing and with a water tank arranged above the sole plate, from which water can be supplied to the evaporator chamber via an adjustable drip valve at the bottom of the water tank, the drip valve being a comprises spring-loaded valve needle which engages in a valve seat projecting into the evaporator chamber in the closed position,

characterized,

that the valve seat (19) can be shut off independently of the valve needle (20) by a sealing body (41) held on the soleplate (10) and supported in the closing direction by a temperature-controlled memory adjusting element (40). Dampfbügeleisen nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilsitz (19) mit radialem Außenabstand in eine Öffnung (36) im Deckelteil (12) der Verdampferkammer (11) einragt, und die Öffnung (36) vom Dichtkörper (41) verschließbar ist.Steam iron according to claim 1, characterized in that the valve seat (19) protrudes with a radial outer distance into an opening (36) in the cover part (12) of the evaporator chamber (11), and the opening (36) can be closed by the sealing body (41). Dampfbügeleisen nach Anspruch 1 und 2 mit einer der Verdampferkammer eine zusätzliche Wassermenge über eine Druckleitung zuführenden, manuell betätigbaren Dosierpumpe zur Erzeugung eines Dampfstoßes, dadurch gekennzeichnet, daß zwischen Druckleitung (31) und Verdampferkammer (11) eine Rücklaufleitung (32) mit einem selbstschließenden Überdruckventil (33) geschaltet ist, wodurch bei geschlossenem Dichtkörper (41) die von der Dosierpumpe ausgestoßene Wassermenge in den Wassertank (15,17) rückführbar ist.Steam iron according to Claims 1 and 2 with a manually operated metering pump which supplies the evaporator chamber with an additional amount of water via a pressure line for generating a burst of steam, characterized in that between the pressure line (31) and the evaporator chamber (11) a return line (32) with a self-closing pressure valve ( 33) is switched, so that when the sealing body (41) is closed, the amount of water expelled by the metering pump can be returned to the water tank (15, 17). Dampfbügeleisen nach Anspruch 3, dadurch gekennzeichnet, daß die Rücklaufleitung (32) durch einen über der Verdampferkammer (11) angeordneten Umlaufeinsatz (34) gebildet ist, der die Druckleitung (32) mit einem Durchbruch (38) im Boden des Wassertanks (15,17) verbindet, und der Durchbruch (38) von einer das Überdruckventil (33) bildenden, am Boden des Wassertanks (15,17) gehalterten, elastischen Glocke (39) abgedeckt ist.Steam iron according to claim 3, characterized in that the return line (32) is formed by a circulation insert (34) arranged above the evaporator chamber (11), which connects the pressure line (32) with an opening (38) in the bottom of the water tank (15, 17 ) connects, and the opening (38) is covered by an elastic bell (39) forming the pressure relief valve (33) and held at the bottom of the water tank (15, 17). Dampfbügeleisen nach Anspruch 1, dadurch gekennzeichnet, daß der vom Deckelteil (12) der Verdampferkammer (11) umschlossene Ventilsitz (19) mit einer Ringlippe (42) in die Verdampferkammer (11) einragt, und der Dichtkörper (41) in Absperrlage mit einem Zapfen (43) in die Ringlippe (42) eingreift.Steam iron according to Claim 1, characterized in that the valve seat (19) enclosed by the cover part (12) of the evaporator chamber (11) projects into the evaporator chamber (11) with an annular lip (42), and the sealing body (41) in the shut-off position with a pin (43) engages in the annular lip (42). Dampfbügeleisen nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Memory-Stellelement (40) als Memory-Druckfeder ausgebildet ist.Steam iron according to one or more of the preceding claims, characterized in that the memory adjusting element (40) is designed as a memory compression spring. Dampfbügeleisen nach Anspruch 6, dadurch gekennzeichnet, daß die Sohlenplatte (10) einen in die Verdampferkammer (11) aufragenden, zentrisch zum Ventilsitz (19) angeordneten Zapfen (44) aufweist, der von der Memory-Druckfeder (40) umgriffen ist.Steam iron according to Claim 6, characterized in that the soleplate (10) has a pin (44) which projects into the evaporator chamber (11) and is arranged centrally to the valve seat (19) and which is guided by the memory compression spring (40) is encompassed. Dampfbügeleisen nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Memory-Druckfeder (40) von einem aus der Sohlenplatte (10) aufragenden Ringkragen (45) umgriffen ist, an dem der Dichtkörper (41) festgelegt ist.Steam iron according to one or more of the preceding claims, characterized in that the memory compression spring (40) is encompassed by an annular collar (45) which projects from the soleplate (10) and on which the sealing body (41) is fixed. Dampfbügeleisen nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Dichtkörper (41) einen mit dem Zapfen (44) der Sohlenplatte (10) korrespondierenden Anschlagwulst (46) aufweist.Steam iron according to one or more of the preceding claims, characterized in that the sealing body (41) has a stop bead (46) which corresponds to the pin (44) of the soleplate (10).
EP91106505A 1990-04-24 1991-04-23 Steam iron Expired - Lifetime EP0454048B1 (en)

Applications Claiming Priority (2)

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DE4012951 1990-04-24
DE4012951A DE4012951C2 (en) 1990-04-24 1990-04-24 steam iron

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EP0454048A2 true EP0454048A2 (en) 1991-10-30
EP0454048A3 EP0454048A3 (en) 1991-12-04
EP0454048B1 EP0454048B1 (en) 1996-06-12

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ES (1) ES2087927T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704246A1 (en) * 1993-04-23 1994-10-28 Moulinex Sa Distribution chamber of an electric steam iron.
EP0866162A2 (en) * 1997-03-20 1998-09-23 ROWENTA-WERKE GmbH Steam iron
CN101858030A (en) * 2009-04-08 2010-10-13 蔡龙威 Electric steam iron with low temperature steam control system

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
DE4133254A1 (en) * 1991-10-08 1993-04-15 Braun Ag Feed regulator for steam irons - has valve seat consisting of first and second sealing face
DE19731014C2 (en) * 1997-07-21 2000-10-12 Rowenta Werke Gmbh Electric steam iron
DE102013103794A1 (en) * 2013-04-16 2014-10-16 Miele & Cie. Kg An ironing appliance

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US2317706A (en) * 1941-04-11 1943-04-27 Westinghouse Electric & Mfg Co Steam iron
GB951532A (en) * 1960-10-31 1964-03-04 Licentia Gmbh Improvements in electrically heated steam irons

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DE3424743A1 (en) * 1984-07-05 1986-01-16 Robert Krups Stiftung & Co KG, 5650 Solingen Steam iron
ES289976Y (en) * 1985-10-30 1988-07-01 Oficina De Investigacion Agrupada,S.A. PERFECTED WATER PASS VALVE FOR STEAM IRONS

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US2317706A (en) * 1941-04-11 1943-04-27 Westinghouse Electric & Mfg Co Steam iron
GB951532A (en) * 1960-10-31 1964-03-04 Licentia Gmbh Improvements in electrically heated steam irons

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704246A1 (en) * 1993-04-23 1994-10-28 Moulinex Sa Distribution chamber of an electric steam iron.
EP0625608A1 (en) * 1993-04-23 1994-11-23 Moulinex S.A. Distribution chamber for electric steam irons
US5444216A (en) * 1993-04-23 1995-08-22 Moulinex (Societe Anonyme) Distribution chamber for an electric steam iron with two compartments separated by a partition
EP0866162A2 (en) * 1997-03-20 1998-09-23 ROWENTA-WERKE GmbH Steam iron
EP0866162A3 (en) * 1997-03-20 1999-02-17 ROWENTA-WERKE GmbH Steam iron
CN101858030A (en) * 2009-04-08 2010-10-13 蔡龙威 Electric steam iron with low temperature steam control system
EP2239366A1 (en) * 2009-04-08 2010-10-13 Lung Wai Choi Electric steam iron with a low temperature steam control system

Also Published As

Publication number Publication date
EP0454048B1 (en) 1996-06-12
DE4012951A1 (en) 1991-10-31
DE4012951C2 (en) 2000-08-31
EP0454048A3 (en) 1991-12-04
ATE139275T1 (en) 1996-06-15
ES2087927T3 (en) 1996-08-01

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