WO1998009015A1 - Reservoir for fluid and steam iron comprising such reservoir - Google Patents

Reservoir for fluid and steam iron comprising such reservoir Download PDF

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Publication number
WO1998009015A1
WO1998009015A1 PCT/IB1997/000759 IB9700759W WO9809015A1 WO 1998009015 A1 WO1998009015 A1 WO 1998009015A1 IB 9700759 W IB9700759 W IB 9700759W WO 9809015 A1 WO9809015 A1 WO 9809015A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
outlet opening
reservoir
valve body
steam chamber
Prior art date
Application number
PCT/IB1997/000759
Other languages
French (fr)
Inventor
Kam Weng Choy
Original Assignee
Philips Electronics N.V.
Philips Norden Ab
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 Philips Electronics N.V., Philips Norden Ab filed Critical Philips Electronics N.V.
Publication of WO1998009015A1 publication Critical patent/WO1998009015A1/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
    • D06F75/14—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/20—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with a compressible solid closure member

Definitions

  • Reservoir for fluid and steam iron comprising such reservoir.
  • the invention relates to a reservoir for fluid having a bottom part, an outlet opening in said bottom part and a valve located at said outlet opening.
  • Prior art valves are made up of a number of parts, such as a valve body, a rubber washer as a sealing element, an actuator part for lifting the valve body and a spring for returning the valve body.
  • the actuator part exerts a force on the valve body against the force of the spring, lifts it up together with the washer so that the outlet opening becomes free.
  • the spring causes the valve body and the washer to return to their initial positions, thereby closing the outlet opening of the reservoir.
  • the direction of the force exerted by the actuator part on the valve body is not always in line with the center line of the valve body and the washer. In that case, the valve body is lifted aslant, nevertheless freeing the outlet opening.
  • valve body with the washer does not return to its initial position.
  • the washer is no longer centered relative to the outlet opening, but somewhat offset with respect to the peripheral edge of the outlet opening. This results in a poor sealing and thus in leaking of the reservoir.
  • It is an object of the invention is to improve the above described valve to obtain a reliable sealing of the outlet opening of a reservoir.
  • a reservoir for fluid having a bottom part, an outlet opening in said bottom part, a valve located at said outlet opening comprising a valve body, a sealing element for cooperation with a peripheral edge of said outlet opening, a resilient element arranged between the bottom part and the valve body and an actuator part for exerting a force on the valve body against a force applied by the resilient element to open the outlet opening, characterized in that the valve body, the sealing element and the actuator part are integrated to form one single part of an elastic material. In this way the valve body, the sealing element and the actuator part all have the same position relative to each other.
  • the resilient element is also integrated in the single part of an elastic material.
  • the invention also relates to a steam iron comprising a housing, a soleplate, means for heating said soleplate, a steam chamber, a water reservoir having an outlet opening which opens into the steam chamber, means for heating said steam chamber, steam outlet ports in said soleplate, a valve located at said outlet opening and actuating means for actuating the valve to open or close the outlet opening.
  • a steam iron comprising a housing, a soleplate, means for heating said soleplate, a steam chamber, a water reservoir having an outlet opening which opens into the steam chamber, means for heating said steam chamber, steam outlet ports in said soleplate, a valve located at said outlet opening and actuating means for actuating the valve to open or close the outlet opening.
  • the reservoir and the valve of such an iron have features as claimed in the reservoir as described hereinbefore.
  • the valve comprises a bellows which is integral with the valve body, the outlet opening opens into a passage, one end of the passage being connected to a steam chamber, the other end being closed by the bellows.
  • actuator means e.g. a bimetallic switch thermally connected to the soleplate.
  • the outlet opening of the reservoir is closed by the valve.
  • the bimetallic switch pushes the actuator upwards, as a result of which the valve is opened and water can enter the steam chamber for generating steam.
  • the soleplate is cooling down, the valve will close the outlet opening. So, the valve acts as a leak stop.
  • the valve according to this invention fulfills this.
  • Fig. 1 shows a steam iron, partly in cross-sectional view
  • Fig. 2 shows in detail and to an enlarged scale the water reservoir of the steam iron of Fig. 1 , provided with the valve in accordance with the invention, and
  • Figs. 3 and 4 show two examples of a valve in which the resilient element is integrated.
  • the steam iron comprises a housing 1 , which at its open underside is closed by a soleplate 2.
  • a steam chamber 3 is situated directly above the soleplate and is closed at the top by a cover plate 4.
  • the soleplate has steam ports 5.
  • a heating element 6 serves both for heating the soleplate 2 and for heating the steam chamber 3 to convert water into steam.
  • a water reservoir 7 is disposed above the steam chamber.
  • An outlet opening 9 i the bottom 8 of the water reservoir opens into the steam chamber.
  • a valve 10 is mounted in the outlet opening and prevents water flowing from the reservoir into the steam chamber in closed position (as shown in the Figures).
  • the valve comprises a valve body 11, a sealing element 12 such as a sealing ring, a resilient element 13 and an actuator part 14.
  • the valve body 11 , the sealing ring 12, the resilient element 13 and the actuator part 14 together form an integral part of an elastic material such as silicone rubber.
  • the resilient element 13, a pressure spring is retained between a rim 15 of the outlet opening and a rim 16 of the valv body.
  • the pressure spring 13 urges the sealing ring 12 onto a peripheral edge 17 of the outlet opening, as a result of which no wate can flow out of the reservoir.
  • the actuator, a push rod 18, is operated by a push-button 19 on the housing of the iron.
  • Fig. 2 shows another valve 21.
  • This valve is disposed in an outlet openin 22 of the reservoir 7, which opens into a passage 23 to the steam chamber 3.
  • a bellows 24 is integral with the valve body 1 1.
  • One end 25 of the passage 23 is closed by the bellows 24 the other end 26 opens into the steam chamber 3 via a metering device 27.
  • the metering device 27 comprises a metering needle 28 having a tapered lower portion 29. This tapered portion 29 engages in an opening 30 in a plastic part 31 interposed between the passage 23 and the steam chamber 3. In the lower position of the metering needle 28 the tapered portion 29 fully closes the opening 30, as a result of which no water can flow to the steam chamber.
  • the resilient element 13 can also be integrated in the valve itself. An example of this is shown in Fig. 3, where the valve body 11 has resilient lugs 36, and in Fig. 4, where the bellows 24 is constructed in such a manner that it always urges the valve downward and thus performs the same function as the spring in Fig. 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)

Abstract

The invention relates to a reservoir (7) for fluid with an outlet opening (9) in a bottom part (8) thereof and a valve (10) located at said outlet opening. Up to now such valves are composed of a number of parts causing often a poor sealing. To obtain a reliable sealing of the outlet opening a number of parts of the valve, such as the valve body (11), the washer (12) and the actuator part (14) are integrated to form one single part of an elastic material such as silicone rubber. Even the resilient element (13) can be integrated in this single part. Such valves are very useful in steam irons between the water reservoir (7) and the steam chamber (3).

Description

Reservoir for fluid and steam iron comprising such reservoir.
The invention relates to a reservoir for fluid having a bottom part, an outlet opening in said bottom part and a valve located at said outlet opening.
Prior art valves are made up of a number of parts, such as a valve body, a rubber washer as a sealing element, an actuator part for lifting the valve body and a spring for returning the valve body. For opening the valve the actuator part exerts a force on the valve body against the force of the spring, lifts it up together with the washer so that the outlet opening becomes free. When the force of the actuator part on the valve body ceases, the spring causes the valve body and the washer to return to their initial positions, thereby closing the outlet opening of the reservoir. In practice however, due to tolerances, the direction of the force exerted by the actuator part on the valve body is not always in line with the center line of the valve body and the washer. In that case, the valve body is lifted aslant, nevertheless freeing the outlet opening. However, when the force of the actuator part ceases, the valve body with the washer does not return to its initial position. The washer is no longer centered relative to the outlet opening, but somewhat offset with respect to the peripheral edge of the outlet opening. This results in a poor sealing and thus in leaking of the reservoir.
It is an object of the invention is to improve the above described valve to obtain a reliable sealing of the outlet opening of a reservoir.
According to the invention, there is provided a reservoir for fluid having a bottom part, an outlet opening in said bottom part, a valve located at said outlet opening comprising a valve body, a sealing element for cooperation with a peripheral edge of said outlet opening, a resilient element arranged between the bottom part and the valve body and an actuator part for exerting a force on the valve body against a force applied by the resilient element to open the outlet opening, characterized in that the valve body, the sealing element and the actuator part are integrated to form one single part of an elastic material. In this way the valve body, the sealing element and the actuator part all have the same position relative to each other. In fact, all these parts have the same center line, so that the forces on the parts have the same direction, as a result of which the valve is lifted and returned to its initial position along the center line. In a further improvement of the valve, the resilient element is also integrated in the single part of an elastic material.
The invention also relates to a steam iron comprising a housing, a soleplate, means for heating said soleplate, a steam chamber, a water reservoir having an outlet opening which opens into the steam chamber, means for heating said steam chamber, steam outlet ports in said soleplate, a valve located at said outlet opening and actuating means for actuating the valve to open or close the outlet opening. According to the invention the reservoir and the valve of such an iron have features as claimed in the reservoir as described hereinbefore.
In a further embodiment of the electric iron the valve comprises a bellows which is integral with the valve body, the outlet opening opens into a passage, one end of the passage being connected to a steam chamber, the other end being closed by the bellows. In such an iron the movement of the valve is influenced by means of actuator means, e.g. a bimetallic switch thermally connected to the soleplate. In a not sufficiently heated state of the soleplate the outlet opening of the reservoir is closed by the valve. Upon heating of the soleplate the bimetallic switch pushes the actuator upwards, as a result of which the valve is opened and water can enter the steam chamber for generating steam. When the soleplate is cooling down, the valve will close the outlet opening. So, the valve acts as a leak stop. To prevent water from entering the steam chamber before the steam chamber has a sufficiently high temperature for generating steam, it is highly desirable that the valve closes the outlet opening in a reliable way. The valve according to this invention fulfills this.
The invention will now be described in more detail, by way of example, with reference to the drawings which show an embodiment of a steam iron. In the drawings: Fig. 1 shows a steam iron, partly in cross-sectional view,
Fig. 2 shows in detail and to an enlarged scale the water reservoir of the steam iron of Fig. 1 , provided with the valve in accordance with the invention, and
Figs. 3 and 4 show two examples of a valve in which the resilient element is integrated. The steam iron comprises a housing 1 , which at its open underside is closed by a soleplate 2. A steam chamber 3 is situated directly above the soleplate and is closed at the top by a cover plate 4. The soleplate has steam ports 5. A heating element 6 serves both for heating the soleplate 2 and for heating the steam chamber 3 to convert water into steam. A water reservoir 7 is disposed above the steam chamber. An outlet opening 9 i the bottom 8 of the water reservoir opens into the steam chamber. A valve 10 is mounted in the outlet opening and prevents water flowing from the reservoir into the steam chamber in closed position (as shown in the Figures). The valve comprises a valve body 11, a sealing element 12 such as a sealing ring, a resilient element 13 and an actuator part 14. The valve body 11 , the sealing ring 12, the resilient element 13 and the actuator part 14 together form an integral part of an elastic material such as silicone rubber. The resilient element 13, a pressure spring, is retained between a rim 15 of the outlet opening and a rim 16 of the valv body. When the valve is not actuated by an actuator 18 the pressure spring 13 urges the sealing ring 12 onto a peripheral edge 17 of the outlet opening, as a result of which no wate can flow out of the reservoir. The actuator, a push rod 18, is operated by a push-button 19 on the housing of the iron. When the push-button is depressed, the rod exerts pressure on th actuator part 14 of the valve, causing the valve to be pressed downward in opposition to the spring force, so that water can flow between the sealing ring 12 and the peripheral edge 17 of the outlet opening into the steam chamber 3. When the push-button 19 is released the sealing ring resumes an exactly centered position on the peripheral edge. This is particularly due to the fact that the valve body 11 , the actuator part 14 and the sealing ring 12 form a single integral part, as a result of which the center lines of the sealing ring and of the actuator part coincide and form a common center line. This is in contradistinction to a prior- art valve comprising a number of different parts each having a separate center line. With these prior-art valves it is not unlikely that when the individual parts of the valve are assembled the center lines of the various parts do not coincide, so that in operation, i.e. when the valve is opened and subsequently closed, the sealing ring is not centered correctly relative to the peripheral edge and the valve starts to leak.
Fig. 2 shows another valve 21. This valve is disposed in an outlet openin 22 of the reservoir 7, which opens into a passage 23 to the steam chamber 3. A bellows 24 is integral with the valve body 1 1. One end 25 of the passage 23 is closed by the bellows 24 the other end 26 opens into the steam chamber 3 via a metering device 27. The metering device 27 comprises a metering needle 28 having a tapered lower portion 29. This tapered portion 29 engages in an opening 30 in a plastic part 31 interposed between the passage 23 and the steam chamber 3. In the lower position of the metering needle 28 the tapered portion 29 fully closes the opening 30, as a result of which no water can flow to the steam chamber. When the metering needle 28 is pulled up, which can be effected by means of a control knob (rotary knob) 32 on the housing of the iron, an annular gap is formed between the tapered portion 29 of the metering needle and the edge 33 of the opening, thus allowing water to flow into the steam chamber. However, when the temperature of the steam chamber is too low to convert water into steam and the metering needle is in the open position, no water is yet allowed to flow into the steam chamber. In order to preclude this the valve 21 has been provided. The valve does not open until a given temperature has been reached. For this purpose, a bimetallic switch is in thermally conductive contact with the soleplate 2. During heating of the soleplate a bimetallic plate 35 moves towards the actuator part 14 of the valve 21. At a given minimum temperature, high enough to convert water into steam, the bimetallic plate 35 urges the valve upward, so that the outlet opening 22 is free. The valve thus acts as a kind of leak stop.
The resilient element 13 can also be integrated in the valve itself. An example of this is shown in Fig. 3, where the valve body 11 has resilient lugs 36, and in Fig. 4, where the bellows 24 is constructed in such a manner that it always urges the valve downward and thus performs the same function as the spring in Fig. 2.

Claims

Claims:
1. A reservoir for fluid having a bottom part, an outlet opening in said bottom part, a valve located at said outlet opening comprising a valve body, a sealing element for cooperation with a peripheral edge of said outlet opening, a resilient element arranged between the bottom part and the valve body and an actuator part for exerting a force on the valve body against a force applied by the resilient element to open the outlet opening, characterized in that the valve body, the sealing element and the actuator part are integrated to form one single part of an elastic material.
2. Reservoir as claimed in claim 1, characterized in that the resilient element is also integrated in the single part of an elastic material.
3. An electric iron comprising a housing, a soleplate, means for heating said soleplate, a steam chamber, means for heating said steam chamber, a water reservoir having an outlet opening which opens into the steam chamber, steam outlet ports in said soleplate, a valve located at said outlet opening and actuating means for actuating the valve to open or close the outlet opening, characterized in that said reservoir and said valve have features as claimed in claims 1 or 2.
4. An electric iron as claimed in claim 3, characterized in that the valve comprises a bellows being integral with the valve body, the outlet opening opens into a passage, one end of the passage being connected to a steam chamber, the other end being closed by the bellows.
5. An electric iron as claimed in claim 2 and 4, characterized in that the resilient element is integrated in the bellows.
PCT/IB1997/000759 1996-08-26 1997-06-23 Reservoir for fluid and steam iron comprising such reservoir WO1998009015A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96202369.3 1996-08-26
EP96202369 1996-08-26

Publications (1)

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WO1998009015A1 true WO1998009015A1 (en) 1998-03-05

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866162A2 (en) * 1997-03-20 1998-09-23 ROWENTA-WERKE GmbH Steam iron
WO1999051897A1 (en) * 1998-04-02 1999-10-14 Mangar International Limited Low pressure pneumatic control valve systems
WO2000008247A1 (en) * 1998-07-31 2000-02-17 Braun Gmbh Steam iron
FR2813894A1 (en) * 2000-09-12 2002-03-15 Rowenta Werke Gmbh SELF-CLEANING STEAM IRON
EP1619430A1 (en) * 2004-07-22 2006-01-25 Bümach Engineering International B.V. Valve
WO2007072145A1 (en) * 2005-12-22 2007-06-28 Rowenta Werke Gmbh Iron comprising a valve controlled by a thermally deformable element
WO2010020659A1 (en) * 2008-08-22 2010-02-25 BSH Bosch und Siemens Hausgeräte GmbH Steam iron
DE102012219294A1 (en) * 2012-09-05 2014-03-06 BSH Bosch und Siemens Hausgeräte GmbH Steam iron comprises valve unit for switching and controlling passage between water tank and steam chamber, valve element formed in one-piece, which has valve section with sealing surface, and actuating element for actuating valve element
EP2706140A1 (en) 2012-09-05 2014-03-12 BSH Bosch und Siemens Hausgeräte GmbH Water treatment device of a steam iron comprising a water-treating agent and method for positioning a water treatment agent in a water tank of a steam iron

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296560A (en) * 1979-02-13 1981-10-27 Seb S.A. Water injection device for a steam iron
DE3708774A1 (en) * 1987-03-18 1988-09-29 Braun Ag Valve for a liquid container that can be separated from a connection line
US4837952A (en) * 1986-10-31 1989-06-13 Seb S.A. Steam iron having variable heat conductivity between the heating base and sole plate
WO1992000411A1 (en) * 1990-06-25 1992-01-09 Strix Limited Steam irons
US5531037A (en) * 1994-01-29 1996-07-02 Braun Aktiengesellschaft Water proportioning device for steam irons

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296560A (en) * 1979-02-13 1981-10-27 Seb S.A. Water injection device for a steam iron
US4837952A (en) * 1986-10-31 1989-06-13 Seb S.A. Steam iron having variable heat conductivity between the heating base and sole plate
DE3708774A1 (en) * 1987-03-18 1988-09-29 Braun Ag Valve for a liquid container that can be separated from a connection line
WO1992000411A1 (en) * 1990-06-25 1992-01-09 Strix Limited Steam irons
US5531037A (en) * 1994-01-29 1996-07-02 Braun Aktiengesellschaft Water proportioning device for steam irons

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO1999051897A1 (en) * 1998-04-02 1999-10-14 Mangar International Limited Low pressure pneumatic control valve systems
WO2000008247A1 (en) * 1998-07-31 2000-02-17 Braun Gmbh Steam iron
US6351901B1 (en) 1998-07-31 2002-03-05 Braun Gmbh Steam iron with capillary device
FR2813894A1 (en) * 2000-09-12 2002-03-15 Rowenta Werke Gmbh SELF-CLEANING STEAM IRON
WO2002022939A2 (en) * 2000-09-12 2002-03-21 Rowenta Werke Gmbh Self-cleaning iron
WO2002022939A3 (en) * 2000-09-12 2002-08-22 Rowenta Werke Gmbh Self-cleaning iron
US6725586B2 (en) 2000-09-12 2004-04-27 Rowenta Werke Gmbh Self-cleaning iron
EP1619430A1 (en) * 2004-07-22 2006-01-25 Bümach Engineering International B.V. Valve
WO2007072145A1 (en) * 2005-12-22 2007-06-28 Rowenta Werke Gmbh Iron comprising a valve controlled by a thermally deformable element
FR2895421A1 (en) * 2005-12-22 2007-06-29 Rowenta Werke Gmbh IRON IRON COMPRISING A VALVE CONTROLLED BY A THERMALLY DEFORMABLE ELEMENT
US7644525B2 (en) 2005-12-22 2010-01-12 Rowenta Werke Gmbh Iron comprising a valve controlled by a thermally deformable element
WO2010020659A1 (en) * 2008-08-22 2010-02-25 BSH Bosch und Siemens Hausgeräte GmbH Steam iron
ES2360994A1 (en) * 2008-08-22 2011-06-13 Bsh Krainel, S.A. Steam iron
RU2471029C2 (en) * 2008-08-22 2012-12-27 Бсх Бош Унд Сименс Хаусгерете Гмбх Steam iron
DE102012219294A1 (en) * 2012-09-05 2014-03-06 BSH Bosch und Siemens Hausgeräte GmbH Steam iron comprises valve unit for switching and controlling passage between water tank and steam chamber, valve element formed in one-piece, which has valve section with sealing surface, and actuating element for actuating valve element
EP2706140A1 (en) 2012-09-05 2014-03-12 BSH Bosch und Siemens Hausgeräte GmbH Water treatment device of a steam iron comprising a water-treating agent and method for positioning a water treatment agent in a water tank of a steam iron
ES2445843R1 (en) * 2012-09-05 2014-04-23 BSH Electrodomésticos España S.A. Steam iron and procedure for mounting the steam iron
DE102012219294B4 (en) * 2012-09-05 2015-11-05 BSH Hausgeräte GmbH A water treatment device of a steam iron comprising a water treatment agent and a method of positioning a water treatment agent in a water tank of a steam iron

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