EP1966430B1 - Bügeleisen mit einem durch ein thermisch verformbares element geregelten ventil - Google Patents

Bügeleisen mit einem durch ein thermisch verformbares element geregelten ventil Download PDF

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Publication number
EP1966430B1
EP1966430B1 EP06821065.7A EP06821065A EP1966430B1 EP 1966430 B1 EP1966430 B1 EP 1966430B1 EP 06821065 A EP06821065 A EP 06821065A EP 1966430 B1 EP1966430 B1 EP 1966430B1
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EP
European Patent Office
Prior art keywords
valve
iron according
steam
iron
temperature
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Active
Application number
EP06821065.7A
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English (en)
French (fr)
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EP1966430A1 (de
Inventor
Jochen Weber
Matthias Hahn
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Rowenta Werke GmbH
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Rowenta Werke GmbH
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Publication of EP1966430A1 publication Critical patent/EP1966430A1/de
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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 present invention relates to irons comprising a soleplate, surmounted by a heating body provided with a vaporization chamber and relates more particularly to an iron in which the vaporization chamber communicates with a reservoir by means of a supply circuit comprising a control valve whose opening is controlled by a thermally deformable element in thermal relation with the heating body.
  • Such irons have the disadvantage of having a device for automatic regulation of the steam flow rate which is very sensitive to the relative positioning of the bimetallic strip with respect to the control valve so that the adjustment of the steam obtained for a given temperature is variable from one iron to another and depends in particular on manufacturing tolerances and assembly of parts.
  • the deformation range of a bimetallic strip for the operating temperatures of an iron is limited, of the order of 3 mm, so that the control of the steam flow rate is very sensitive to a positioning difference of the bimetal. .
  • Such irons therefore do not allow to obtain an optimized setting of the steam flow for a given temperature of the sole, to the detriment of the ironing efficiency.
  • the object of the present invention is to overcome these disadvantages by providing an iron having an automatic steam flow control device which is less sensitive to manufacturing and assembly tolerances of the parts so as to ensure, from one iron to the other, a more constant adjustment of the flow rate of steam for a given temperature of the sole.
  • Another object of the present invention is to provide an iron comprising a device for automatic regulation of the steam flow having a very good reactivity in low temperatures in order to prevent water from being admitted into the vaporization chamber when the It is too cold to spray water and may drip through the steam outlet holes in the soleplate.
  • a steam iron comprising a soleplate in thermal relation with a heating body provided with a vaporization chamber, the vaporization chamber communicating with a reservoir by means of a feed circuit comprising a flow control valve whose degree of opening is controlled by a thermally deformable element in thermal relation with the heating body, characterized in that the opening of the control valve is braked from an intermediate temperature by a stabilizing element exerting a force opposing the force generated by the thermally deformable element.
  • Such a feature has the advantage of allowing the establishment of a bearing in the opening law of the control valve as a function of temperature.
  • the degree of opening of the valve is thus stabilized, over a temperature range of several degrees from the intermediate temperature, to a value allowing a flow of steam adapted to the intermediate temperature of the sole.
  • the stabilizing element does not act on the opening of the valve below the intermediate temperature makes it possible to maintain a high reactivity of the valve for the low operating temperatures of the iron, which makes it possible to ensure an effective anti-gout function.
  • the intermediate temperature from which the thermally deformable element begins to be braked by the stabilizing element is between 130 ° C and 150 ° C.
  • the stabilizing element is constituted by a spring rod.
  • the force produced by the stabilizing element is exerted directly on a member of the control valve.
  • the force produced by the stabilizing element is exerted directly on the thermally deformable element.
  • the stabilizing element and the regulating valve are carried by the same support piece.
  • the support piece is a heat shield disposed above the heating body.
  • the thermally deformable element is a bimetallic strip.
  • the supply circuit also comprises a plug arranged in series with the regulating valve, the plug being able to occupy a closed position for carrying out dry ironing and at least one open position calibrated to allow pass a flow of water corresponding to the maximum vapor rate that can provide the vaporization chamber.
  • the plug can occupy an additional position to allow a larger amount of water to pass abruptly to perform a self-cleaning operation.
  • the figure 1 represents a steam iron comprising a sole 1 surmounted a housing 2 containing a steam control device 3, shown in dashed lines in this figure, comprising a control button 4 accessible on the front of the iron.
  • the sole 1 is surmounted by a heating body 5, advantageously made of aluminum, conventionally comprising a heating element 51 curved horseshoe and a boss 52 provided to receive a temperature control thermostat, not shown on the FIGS.
  • the heating body 5 comprises, in its upper part, a vaporization chamber 53 of large dimensions, represented in dotted line on the figure 2 closed by a closure plate 54 having an opening 54A near the front end of the vaporization chamber 53.
  • a heat shield 6 is interposed between the upper face of the heating body 5 and the housing 2, this heat shield 6 incorporating a side skirt 61 having a lower edge conforming to the outer shape of the sole 1.
  • the housing 2 encloses a water tank 7 whose lower part is defined by the heat shield 6, the latter comprising an annular channel 62 receiving, with the interposition of a sealing bead, the walls of the housing 2 defining the part tank top.
  • the iron comprises a supply circuit providing a passage of water from the tank 7 to the vaporization chamber 53 and having a plug 8 opening into the opening 54A of the plate 54, the plug 8 having a nozzle seal 9 based on the closure plate 54 and a rod 80 whose axial displacement is controlled by the control button 4.
  • the stem 80 of the plug can be brought, by the control button 4, into three separate positions respectively for dry ironing, steam ironing and self-cleaning operation of the iron for its descaling.
  • the rod 80 has a solid part, closing the orifice of the nozzle seal 9 when the rod 80 is brought into the position illustrated in FIG. figure 6 .
  • the rod 80 also has a first notch 80A having a passage section limiting the maximum water flow sent to the vaporization chamber 53 when the rod 80 of the plug is brought into the position illustrated in FIGS. figures 7 and 8 by rotating the control knob 4.
  • the rod 80 of the plug has a second notch 80B providing a larger passage section and allowing the cleaning of the iron, by the sudden inflow of a large amount of water in the superheated steam chamber 53, when the rod 80 is brought into the position illustrated in FIG. figure 9 by rotating the control knob 4.
  • the supply circuit comprises, upstream of the plug 8, a regulating valve 10 and an intermediate chamber 15 arranged between the regulating valve 10 and the plug 8.
  • the control valve 10 comprises an axis 11 provided with a conical portion 11B extending inside an orifice 13 opening into the bottom of the tank 7 so that the section of water passage from the reservoir to the intermediate chamber varies when the axis 11 moves axially in the orifice 13.
  • the upper part of the shaft 11 supports a valve 12, consisting of a rubber bell encircling the axis 11, the periphery of the valve 12 coming into contact sealed with the periphery of the orifice 13 when the axis 11 is moved axially downwards, as is shown in FIG. figure 6 .
  • the upper end of the shaft 11 is connected to one end of a lever 14 pivotally mounted on a wall 63 carried by the heat shield 6, the other end of the lever 14 having an opening through which the rod 80 of the plug , the latter having a lug 81 which press on the end of the lever 14 when the control knob 4 is brought into the self-cleaning position.
  • the lower part of the axis 11 passes through a sealing membrane 90 and has a rounded end forming a pad 11A facing the free end of an elongate bimetallic strip 16 carried by the heating body 5, the bimetallic strip 16. being fixed on a boss 55 of the heating body 5 by means of a screw 17.
  • the sealing membrane 90 is carried by the rubber piece attached to the heat shield 6 also defining the nozzle joint 9 , this rubber piece delimiting the lower part of the intermediate chamber 15.
  • the control valve 10 comprises a stabilizing element consisting of a spring rod 18 carried by the heat shield 6.
  • This spring rod 18 is advantageously fixed at one of its ends on the underside of the heat shield 6 by means of a screw 19, the other end of the spring rod 18 extending freely above the bimetallic strip 16 and bordering the stud 11A of the control valve, as well as see him well on the figure 5 .
  • the spring rod 18 will be made in a stainless steel wire with a diameter of the order of 0.8 to 1 mm.
  • the figure 6 represents a sectional view of the supply circuit of the vaporization chamber 53 on which is represented, in mixed line, the position of the bimetallic strip 16 for a cold sole and, in solid lines, the position of the bimetal strip for a sole temperature of the order of 120 ° C.
  • the rod 80 of the plug 8 is shown, for example, in the closed position for dry ironing.
  • the bimetallic strip 16 when the temperature of the soleplate is less than 120.degree. C., the bimetallic strip 16 is bent downwards and is not in contact with the end pad 11A of the axis of the regulation valve 10. , the weight of the axis 11 and the elasticity of the membrane 90 ensuring the closing of the valve 12. Under these conditions, the water of the reservoir 7 can not flow to the intermediate chamber 15 so that the chamber of vaporization 53 does not receive water, even if the plug 8 is in the open position, as illustrated, for example, in FIG. figure 7 , for a steam ironing.
  • the bimetal 16 thus provides an anti-drip function by preventing the water from being sent into the vaporization chamber 53 when the temperature of the latter is not sufficient to ensure its evaporation.
  • the bimetallic strip 16 comes into contact with the end pad 11A of the axis of the regulation valve 10 and then exerts on the latter a vertical pressure. who tends to lift the axis 11 and the valve 12 associated therewith. Beyond this temperature, the pressure exerted by the bimetallic strip 16 raises the valve 12 and the water of the tank 7 can flow at a low flow rate through the orifice 13 towards the intermediate chamber 15.
  • the bimetallic When the temperature of the sole reaches an intermediate temperature, around 140 ° C., the bimetallic contacts the spring rod 18, as illustrated on FIG. figure 7 which represents an enlarged view of the feed circuit.
  • the bimetallic strip 16 is thus stabilized in a predefined position by the spring rod 18, this position of stabilization of the bimetallic strip 16 corresponding to an opening of the valve 10 adapted to provide a low flow rate of steam, for example of the order of 10 gr / mn, the axis 11 then being lifted of the order of 0.5 mm from its initial rest position corresponding to the closing of the valve 12.
  • the flow of water that can be sent to the vaporization chamber 53 is limited to a maximum value defined by the passage section of the first notch 80A of the plug shaft, this first notch 80A being dimensioned to correspond to the maximum vapor flow rate that can be produced by the vaporization chamber 53, taking into account the power of the heating element 51.
  • the first groove 80A will be sized to allow a flow rate of maximum water corresponding to a production of the order of 35 g / min of water vapor.
  • the figure 9 illustrates the supply circuit of the vaporization chamber 53 when the control knob 4 is turned to the self-cleaning position.
  • the rod 80 of the plug In this position of the button 4, the rod 80 of the plug is moved downwards and the second notch 80B, of larger section, is opposite the nozzle seal 9 thus allowing the sudden arrival of a large amount of This self-cleaning operation, known per se, is carried out with the temperature thermostat of the soleplate 1 set to the maximum temperature.
  • the movement of the rod 80 downward is accompanied by a push of the lug 81 on the end of the lever 14 which causes the tilting of the latter, the opposite end of the lever holding the axis 11 of the control valve 10 in a raised position, corresponding to the maximum degree of opening of the valve 10.
  • Such a feature allows to keep a large flow of water from the tank 7 to the vaporization chamber 53 when the temperature of the sole decreases during the self-cleaning operation.
  • FIGS. 10 to 15 illustrate an alternative embodiment of the supply circuit of the vaporization chamber in which the control valve and the stabilizing element constituted by the spring rod have been modified, the other elements of the iron being similar to those previously described for the first mode embodiment of the invention.
  • the supply circuit comprises a regulating valve 110 comprising a substantially cylindrical axis 111 extending inside the orifice 13 of the bottom of the reservoir, this axis 111 supporting a valve 112, consisting of a rubber bell, likely to close the orifice 13 when the axis 111 is moved down.
  • the regulation valve 110 comprises a stabilizing element constituted by a spring rod 118 carried by the heat shield 6.
  • This spring rod 118 has one of its ends fixed on the upper face of the heat shield 6 by means of a screw 119, the other end the spring rod 118 having a loop extending over the valve 112 by coming to exert on the latter a downward pressure to close the valve 112 and prevent the flow of water from the reservoir 7 to the orifice 13.
  • the upper end of the axis 111 is connected to the lever 14 pivotally mounted on the wall 63 and the lower part of the axis 111 has a rounded end forming a stud 111A through the diaphragm. sealing 90 and coming opposite the free end of the bimetallic strip 16 carried by the heating body 5.
  • the axis 111 of the valve 110 has four fins 113 extending at 90 ° from one another between the valve 112 and the membrane 90, these fins forming spacers notably participating in the immobilization of the membrane 90 on the axis 111.
  • the valve 112 has a central bore 112A having in its lower part a diameter restriction forming a lip 112B engaging in a groove 111B of the axis 111 disposed just above the fins 113.
  • the diameters of the central bore 112A and of the lip 112B are greater than the outside diameters of the parts of the axis 111 facing each other so that a radial space results between the axis 111 and the valve 112, advantageously of the order of a few tenths of a millimeter, allowing the passage of water.
  • the height of the groove 111B is greater than the height of the lip 112B so that the axis 111 can move axially a few millimeters through the valve 112 between a closed position, illustrated in FIG. figure 13a , in which the lip 112B bears against the upper edge of the groove 111B and an open position, illustrated in FIG. figure 13b in which the lip 112B bears against the lower edge of the groove 111B.
  • a closed position illustrated in FIG. figure 13a
  • the lip 112B bears against the upper edge of the groove 111B
  • an open position illustrated in FIG. figure 13b in which the lip 112B bears against the lower edge of the groove 111B.
  • the closed position the water of the reservoir 7 can not flow towards the intermediate chamber 15 because of the tight connection established between the upper edge of the lip 112B and the upper edge of the groove 111B.
  • the reservoir water can pass into the radial space extending between the axis 111 and the lip 112B and flow through a calibrated 111C notch made in the lower edge of the groove 111B, between two fins 113.
  • the figure 11 illustrates the supply circuit of the vaporization chamber 53 when the temperature of the sole 1 is cold, the bimetallic strip 16 being bent downwards and the valve 112 of the control valve 110 being brought back by the spring rod 118 in contact with the wall of the heat shield 6 defining the bottom of the tank.
  • the valve 112 forms a tight connection around the orifice 13 and the axis 111 of the regulating valve is brought, by its weight and by the elastic return of the sealing membrane 90, in the illustrated position.
  • the figure 13a wherein the upper edge of the lip 112B of the valve is in sealing contact with the upper edge of the groove 111B, so that water can not flow to the vaporization chamber 53.
  • the bimetallic strip 16 comes into contact with the stud 111A of the axis of the regulating valve and slightly raises the latter to bring the lower edge of the groove 111B into contact with the lower edge of the lip 112B, as illustrated in figures 13b and 14 when the temperature of the sole reaches an intermediate temperature, advantageously of the order of 140 ° C.
  • this lifting of the axis 111 of the control valve is carried out initially without lifting the valve 112 which remains pressed against the bottom of the tank 7 by sealing around the orifice 13.
  • the force generated by the spring rod 118 on the valve 112 is greater than the force generated by the bimetallic strip 16 on the axis 111 when the temperature of the soleplate 1 remains below a temperature threshold, advantageously of the order 160 ° C.
  • the water can pass into the space extending between the central bore 112A, the lip 112B of the valve and the axis 111 of the valve, then to escape in the direction of the intermediate chamber 15 by the notch 111C provided at the edge of the lower edge of the groove 111B, before flowing through the plug 8 into the vaporization chamber 53.
  • a substantially constant water flow defined by the passage section of the slot 111C, the latter being adapted to produce a flow rate of water of the order of 10 gr / min.
  • the control valve 110 passes a large quantity of water under the valve 112, then through the orifice 13 to the intermediate chamber 15, the flow of water sent to the vaporization chamber 53 being limited by the passage section of the first notch 80A of the plug shaft which is sized to pass a maximum water flow corresponding to a production of 35 gr / min of steam.
  • a regulating device thus makes it possible to considerably reduce the impact of the mounting tolerances of the heat shield on the heating body on the regulation of the regulating device.
  • the spring rod being fixed directly on the heat shield, this reduces the inaccuracies due to mounting dispersions since the control valve and the spring rod are carried by the same piece.
  • bimetallic strip with the temperature below the reference temperature makes it possible to maintain a very reactive system in low temperatures so that the system effectively performs the anti-drip function, by ensuring the rapid blocking of the flow of water towards the vaporization chamber, when the latter is not at a temperature sufficient to ensure the evaporation of drops of water.
  • the shape of the bimetallic strip may, for example, be in the form of a disk or a thermostatic spring.
  • control valve may be a rotary valve.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)
  • Temperature-Responsive Valves (AREA)

Claims (9)

  1. Dampfbügeleisen, umfassend eine Sohle (1) in thermischer Beziehung zu einem Heizkörper (5), der mit einer Verdampfungskammer (53) versehen ist, wobei die Verdampfungskammer (53) mit einem Behälter (7) mittels eines Versorgungskreislaufs in Verbindung steht, der ein Absperrorgan zur Regelung (10; 110) des Flusses aufweist, dessen Öffnungsgrad durch ein thermisch verformbares Element (16) in thermischer Beziehung zu dem Heizkörper (5) gesteuert wird, dadurch gekennzeichnet, dass das Öffnen des Absperrorgans zur Regelung (10; 110) ab einer Zwischentemperatur durch ein Stabilisierungselement (18; 118) gebremst wird, das eine Kraft ausübt, die der von dem thermisch verformbaren Element (16) ausgeübten Kraft entgegen wirkt, wobei das Stabilisierungselement (18; 118) nicht auf das Öffnen des Absperrorgans unterhalb der Zwischentemperatur wirkt, wobei die Zwischentemperatur, ab der das thermisch verformbare Element (16) durch das Stabilisierungselement (18; 118) beginnt abgebremst zu werden, zwischen 130 °C und 150 °C liegt.
  2. Dampfbügeleisen nach Anspruch 1, dadurch gekennzeichnet, dass das Stabilisierungselement (18; 118) aus einem Federstab besteht.
  3. Bügeleisen nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die vom Stabilisierungselement (118) erzeugte Kraft direkt auf ein Element (112) des Absperrorgans zur Regelung (110) ausgeübt wird.
  4. Bügeleisen nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die von dem Stabilisierungselement (18) erzeugte Kraft direkt auf das thermisch verformbare Element (16) ausgeübt wird.
  5. Bügeleisen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Stabilisierungselement (18; 118) und das Absperrorgan zur Regelung (10; 110) von einem gleichen Stützteil (6) getragen werden.
  6. Bügeleisen nach Anspruch 5, dadurch gekennzeichnet, dass das Trägerstück (6) ein Hitzeschild ist, das über dem Heizkörper (5) angeordnet ist.
  7. Bügeleisen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das thermisch verformbare Element (16) ein Bimetallstreifen ist.
  8. Bügeleisen nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Versorgungskreislauf auch einen Stopfen (8) umfasst, der in Reihe mit dem Absperrorgan zur Regelung (10; 110) angeordnet ist, wobei der Stopfen (8) eine geschlossene Position, um ein Trockenbügeln zu bewirken, und mindestens einer kalibrierte offene Position einnehmen kann, um einen Wasserdurchfluss durchfließen zu lassen, der der maximalen Dampfmenge entspricht, die die Verdampfungskammer (53) liefern kann.
  9. Bügeleisen nach Anspruch 8, dadurch gekennzeichnet, dass der Stopfen (8) eine zusätzliche Position einnehmen kann, die es ermöglicht, plötzlich eine größere Menge Wasser durchtreten zu lassen, um einen Selbstreinigungsvorgang durchzuführen.
EP06821065.7A 2005-12-22 2006-12-06 Bügeleisen mit einem durch ein thermisch verformbares element geregelten ventil Active EP1966430B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0513134A FR2895421B1 (fr) 2005-12-22 2005-12-22 Fer a repasser comprenant une vanne commandee par un element thermiquement deformable
PCT/IB2006/003604 WO2007072145A1 (fr) 2005-12-22 2006-12-06 Fer a repasser comprenant une vanne commandee par un element thermiquement deformable

Publications (2)

Publication Number Publication Date
EP1966430A1 EP1966430A1 (de) 2008-09-10
EP1966430B1 true EP1966430B1 (de) 2018-11-21

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EP06821065.7A Active EP1966430B1 (de) 2005-12-22 2006-12-06 Bügeleisen mit einem durch ein thermisch verformbares element geregelten ventil

Country Status (8)

Country Link
US (1) US7644525B2 (de)
EP (1) EP1966430B1 (de)
CN (1) CN101346509B (de)
ES (1) ES2702777T3 (de)
FR (1) FR2895421B1 (de)
RU (1) RU2416685C2 (de)
TR (1) TR201819181T4 (de)
WO (1) WO2007072145A1 (de)

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CN206189164U (zh) * 2016-09-01 2017-05-24 皇家飞利浦有限公司 熨斗及熨斗的背盖
CN207659747U (zh) * 2017-12-05 2018-07-27 漳州灿坤实业有限公司 蒸气熨斗
CN107974819B (zh) * 2017-12-26 2024-01-26 月立集团有限公司 一种压力感应蒸汽电熨斗
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Also Published As

Publication number Publication date
WO2007072145A1 (fr) 2007-06-28
US7644525B2 (en) 2010-01-12
RU2008130056A (ru) 2010-01-27
RU2416685C2 (ru) 2011-04-20
EP1966430A1 (de) 2008-09-10
FR2895421B1 (fr) 2008-06-06
US20090000161A1 (en) 2009-01-01
CN101346509A (zh) 2009-01-14
FR2895421A1 (fr) 2007-06-29
ES2702777T3 (es) 2019-03-05
TR201819181T4 (tr) 2019-01-21
CN101346509B (zh) 2012-12-26

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