EP0135484B1 - Improvements in steam generators for use with electrodomestic appliances such as a steam iron - Google Patents

Improvements in steam generators for use with electrodomestic appliances such as a steam iron Download PDF

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Publication number
EP0135484B1
EP0135484B1 EP19840830216 EP84830216A EP0135484B1 EP 0135484 B1 EP0135484 B1 EP 0135484B1 EP 19840830216 EP19840830216 EP 19840830216 EP 84830216 A EP84830216 A EP 84830216A EP 0135484 B1 EP0135484 B1 EP 0135484B1
Authority
EP
European Patent Office
Prior art keywords
steam
chamber
steam generator
nozzle
iron
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.)
Expired
Application number
EP19840830216
Other languages
German (de)
French (fr)
Other versions
EP0135484A3 (en
EP0135484A2 (en
Inventor
Costantino Ronchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ELWATT S.R.L.
Original Assignee
ELWATT Srl
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
Priority to IT2210283 priority Critical
Priority to IT2210283A priority patent/IT1163794B/en
Priority to IT2319483A priority patent/IT8323194D0/en
Priority to IT2319483 priority
Priority to IT2318483U priority
Priority to IT2318483U priority patent/IT8323184V0/en
Priority claimed from AT84830216T external-priority patent/AT39562T/en
Application filed by ELWATT Srl filed Critical ELWATT Srl
Publication of EP0135484A2 publication Critical patent/EP0135484A2/en
Publication of EP0135484A3 publication Critical patent/EP0135484A3/en
Publication of EP0135484B1 publication Critical patent/EP0135484B1/en
Application granted granted Critical
Expired legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00Hand irons
    • D06F75/08Hand irons internally heated by electricity
    • D06F75/10Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/12Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water supplied to the iron from an external source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/28Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/287Methods of steam generation characterised by form of heating method in boilers heated electrically with water in sprays or in films

Description

  • Combination of steam iron and steam generator are per se known such as, for example, of the type in which a reciprocating membrane pump pumps water from a water container and to a steam generatorfrom which steam is supplied to a steam iron under the control of a push button provided in the iron handle The reciprocating membrane pump is connected to an inlet pipe and an outlet pipe, each provided of a non-return valve.
  • A first drawback of the known combination resides in the calcareous deposits that render the steam iron inefficient after a very short period of time.
  • A second drawback of such known very expensive and not operative combination is that it is not a compact construction.
  • A third drawback of such known combination resides in the fact that the operator must press the control push button with a high frequency since the steam generator has no thermic inertia.
  • A fourth drawback of such known combination is that the combination is necessarily limited to steam irons. US-A-2 606 272 discloses a vapor generator in which a pump feeds water from a water reservoir to a heating unit; the heating unit comprises a metallic block heated by electric resistors. This vapor generator is not suitable for domestic use and no provisions are made to prevent calcium deposits. Cleaning operations and general maintenance must be performed by specialists and would be expensive and time consuming.
  • FR-A-2 306 400 discloses a vaporization chamber with front and rear opening of expensive construction, which does not solve adequately the cleaning and decalcification problems.
  • The task of this invention is to provide a reliable, efficient, durable steam generator which is suitable also for domestic appliances and in which provisions are made to prevent calcium deposits and to facilitate cleaning operations and general maintenance.
  • This task is achieved by a steam generator as defined in claim 1.
  • The invention will be more clearly understood from the following detailed description of a preferred embodiment thereof illustrated in the enclosed drawings, wherein:
    • Fig. 1 shows the steam iron and steam generator combination with the cover disconnected for representation consistency;
    • Fig. 2 is an electric diagram of the proposed combination;
    • Fig. 3 shows according to a sectional view the novel disposable device for decalcifying the water to be supplied to the water reservoir;
    • Fig. 4shows partially according to a longitudinal sectional view the steam outlet embodying the steam outlet nipple permitting the cleaning of the steam generator chamber as well of the steam outlet nipple only;
    • Fig. 5 shows with some portions removed an horizontal sectional view of the steam generator;
    • Fig. 6 shows the different possible applications of the proposed combination.
  • The following specification will deal separately with:
    • I: General construction
    • II: Anticalciferous means
    • III: Steam generator
    • IV: Operation
    I General Construction
  • With reference to the Figure 1 the invention provides a support frame FR made of metallic sheet or of plastics material supporting a steam generator SB, an electrical vibration piston pump PU, and a water reservoir CO. A cover or closure KO is provided having an opening AP to provide access to the water inlet opening /A of the water reservoir CO. The cover KO may be fixed to the support frame FR with screws and the frame has an up-standing side flange PR with a carrying handle MA.
  • The cover has an aperture which receives a switch SW associated with a warning lamp WL.
  • The piston pump PU is supported by two spaced rubber flanges FL 1-FL which absorb the pump vibrations.
  • II Anticalciferous means
  • Reference is made to the Figures 3, 4, and 5.
  • A container CN is partially charged with known resin RS and has an upper aperture UA and a lower aperture LA, the latter cooperating with the inlet opening IA of the water reservoir.
  • UA and LA are designed respectively to receive stoppers SR1-ST2 and the exchange resin container is of the disposable kind. The resin layer RS is confined between two spongy layers SR1-S72, leaving an upper cavity CV so that the resin container CN operates as illustrated as a funnel. When the resin container is removed from the water reservoir CO a rubber stopper SR closes the water inlet as shown in dotted lines in Figure 3.
  • When the resin is exhausted the resin coloration changes, alerting the operator that a fresh container should be substituted.
  • With reference now to the Figure 4 novel means are illustrated for the removal of calciferous deposits in the event that a resin container is not used.
  • The steam generator SB has a steam chamber CA and comprises a metallic body BL incorporating an electric heating resistor RE associated with a thermostat TH. A threaded bushing TB is fixed to the outlet of the cylindrical steam chamber having an internal threaded portion which receives an outlet steam nipple ON. The latter is hollow and machined with a set of holes and presents an inside threaded portion TR cooperating with a screw SC that presents a longitudinal hole HL.
  • To a cylindrical portion CY of nipple a steam hose SH may be secured with a band BN in known manner.
  • If it is required to clean only the nipple ON it is sufficient to unscrew the screw SC. If it is required to clean the whole steam chamber, the nipple ON may be unscrewed and removed to give access to steam chamber CA for cleaning with a brush (non represented).
  • A "teflon" insulating sleeve is provided for the protection of the steam hose SH.
  • III Steam Generator
  • The steam generator SB comprises a metallic block BL embodying a heating resistor RE. The inlet water duct has been shown at Wand is close to the water outlet OU from the pump to which it is connected by a teflon duct TD as shown. An insulating layer LY covers the metallic block BL, and the layer LY and the block BL are surrounded by metallic housing HO as shown. In this way the invention provides a steam generator that has a very high thermal inertia.
  • IV Operation
  • From the foregoing and particularly from the Fig. 2 the operation of the proposed novel combination is apparent.
  • If the switch SW is operated to connect the electrical supply (compare Fig. 2) the heating resistor RE produces steam from the water injected into the steam chamber if the pump is energized. This is rendered possible by activating the switch push button PP provided in the iron handle HA. The warning lamp is not energized. If the temperature in the steam generator chamber is too high the thermostat disconnects the heating resistor from the electrical supply and the warning lamp is energized. Namely the lamp is energized as soon as the thermostat opens.
  • For preventing calciferous deposits the resin container operating as funnel may be used, as already stated (see II).
  • If the resin container is not used the calciferous deposits may be removed from the steam outlet nipple e.g. ON or from the steam generator chamber CA as stated (see II).
  • As will be apparent the steam iron rests on the cover KO, when ironing is not required.
  • FU shows a fuse and RY the electrical resistor of the steam iron combination.
  • With reference now to the Figures 1, 2 and 6 it results apparently that the electrodomestic appliance such as a steam iron may be disconnected and the steam generator may be used alternatively for a steam floor washing apparatus SA, a coffee machine CM or an electric steam brush VB and so like. This is permitted thanks to the provision of a quadripolar plug QP and a quadripolar socket AT which latter is fixed to the flanged portion PR.
  • Since the steam hose and the electric quad- ripole cable may be disconnected the whole Fig. 1 steam generator may be alternatively used for the Fig. 6 uses.
  • The objects and advantages of the invention well result from the foregoing.

Claims (5)

1. A steam generator (SB) for use with electrodomestic appliances such as a steam iron, comprising a metallic block (BL) made of a material with high thermal inertia embodying heating resistors (RE) and a vaporization chamber (CA), thermostat means (TH), cooperating with a warning lamp (WL), being connected in series to said heating resistors (RE), said steam generator being connected to a water reservoir (CO), by means of a vibration electric pump (PU), for feeding water to said chamber, and to an appliance such as a steam iron (IR), said steam generator further comprising a threaded steam outlet to which a nozzle (ON) is applied, said nozzle being removably associated with said vaporization chamber and adapted for permitting access to said chamber for cleaning purposes, characterized in that said nozzle (on) comprises a hollow part connected at one side to said chamber by means of a set of radially arranged holes (FX) and at the opposite side connected to a hose (SH), said hollow part of said nozzle protruding into said chamber (CA), said nozzle having also an internal threading (TR) engaging a screw (SC) fitted with a calibrated hole (LH) for delivery steam at suitable high pressure, said screw being removable for permitting cleaning of said nozzle, said hollow part of said nozzle having, on its side adjacent to said chamber, a closed flat end defining, together with the internal walls of said chamber, an annular laminating passage adapted for reducing calcium deposits.
2. A steam generator, according to claim 1, wherein said vaporization chamber (CA) is connected to said vibration electric pump (PU) by means of a nipple (IW) of relatively large internal diameter located on the sid.e of said chamber opposite to said nozzle.
3. A steam generator, according to claim 1, wherein said vibration electric pump (PU) is activated by a switch (PP) associated to said appliance.
4. A steam generator, according to claims 1 and 3, wherein said steam generator, water reservoir and vibration pump are associated to a base element (FR) and a cover element (KO), said cover element being adapted to operate as a support member for an appliance such as a steam iron.
5. A steam generator, according to claim 1, wherein said heating resistors (RE) are embodied into said metallic block (BL) during the moulding stage.
EP19840830216 1983-07-18 1984-07-16 Improvements in steam generators for use with electrodomestic appliances such as a steam iron Expired EP0135484B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT2210283 1983-07-18
IT2210283A IT1163794B (en) 1983-07-18 1983-07-18 Electric iron steam generator
IT2319483 1983-10-07
IT2318483U 1983-10-07
IT2318483U IT8323184V0 (en) 1983-10-07 1983-10-07 Boiler, monolithic metal provided with a hole of vaporization of water and a through hole for a heating resistor.
IT2319483A IT8323194D0 (en) 1983-10-07 1983-10-07 Instant steam generator in particular for household appliances such as irons, scrubbers and the like.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT84830216T AT39562T (en) 1983-07-18 1984-07-16 Steam generators for use in household appliances like like steam iron.

Publications (3)

Publication Number Publication Date
EP0135484A2 EP0135484A2 (en) 1985-03-27
EP0135484A3 EP0135484A3 (en) 1985-06-05
EP0135484B1 true EP0135484B1 (en) 1988-12-28

Family

ID=27273248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840830216 Expired EP0135484B1 (en) 1983-07-18 1984-07-16 Improvements in steam generators for use with electrodomestic appliances such as a steam iron

Country Status (2)

Country Link
EP (1) EP0135484B1 (en)
DE (1) DE3475826D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7753009B2 (en) 2006-10-19 2010-07-13 Whirlpool Corporation Washer with bio prevention cycle
US8393183B2 (en) 2007-05-07 2013-03-12 Whirlpool Corporation Fabric treatment appliance control panel and associated steam operations
WO2013011475A3 (en) * 2011-07-19 2014-03-06 Koninklijke Philips N.V. Domestic appliance comprising an actuator
WO2013011473A3 (en) * 2011-07-19 2014-03-06 Koninklijke Philips N.V. Domestic appliance comprising an actuator

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158210A (en) * 1984-03-21 1985-11-06 Christopher James Nutt Vapour generator
FR2582028A1 (en) * 1985-05-20 1986-11-21 Brenot Claude Ironing appliance with direct evaporation
DE69115937T2 (en) * 1990-01-17 1996-05-23 Metalnova Di Dario Pietro E Ma Steam iron
DE4203414A1 (en) * 1992-02-06 1993-08-12 Braun Ag Steam iron with replaceable filter insert
FR2688013B1 (en) * 1992-02-28 1995-11-10 Moulinex Sa Steam ironing units comprising an iron.
FR2695660B1 (en) * 1992-09-16 1995-11-10 Moulinex Sa Device for connecting a demineralization cassette mounted on a steam ironing device.
DE4301350C1 (en) * 1993-01-20 1993-12-02 Pfaff Ag G M Ironing machine for control of ion exchange water softener
DE19505342C1 (en) * 1995-02-17 1996-04-18 Kaercher Gmbh & Co Alfred Combined steam cleaning and steam ironing device
IT1295732B1 (en) * 1997-08-04 1999-05-27 Vetrella Spa Lid for iron steam iron with outside tank
FR2889211B3 (en) * 2005-07-26 2007-09-07 Seb Sa Ironing apparatus comprising a switching device for selectively feeding steam and electricity different accessories
US7941885B2 (en) 2006-06-09 2011-05-17 Whirlpool Corporation Steam washing machine operation method having dry spin pre-wash
US7730568B2 (en) 2006-06-09 2010-06-08 Whirlpool Corporation Removal of scale and sludge in a steam generator of a fabric treatment appliance
US7765628B2 (en) 2006-06-09 2010-08-03 Whirlpool Corporation Steam washing machine operation method having a dual speed spin pre-wash
US7665332B2 (en) 2006-08-15 2010-02-23 Whirlpool Corporation Steam fabric treatment appliance with exhaust
US7707859B2 (en) 2006-08-15 2010-05-04 Whirlpool Corporation Water supply control for a steam generator of a fabric treatment appliance
US7841219B2 (en) 2006-08-15 2010-11-30 Whirlpool Corporation Fabric treating appliance utilizing steam
US7886392B2 (en) 2006-08-15 2011-02-15 Whirlpool Corporation Method of sanitizing a fabric load with steam in a fabric treatment appliance
US7681418B2 (en) 2006-08-15 2010-03-23 Whirlpool Corporation Water supply control for a steam generator of a fabric treatment appliance using a temperature sensor
WO2008025189A1 (en) * 2006-08-24 2008-03-06 Tuming You Method and device for generating pressurized steam and cleaner and iron with the same device
US7918109B2 (en) 2007-08-31 2011-04-05 Whirlpool Corporation Fabric Treatment appliance with steam generator having a variable thermal output
US8555675B2 (en) 2007-08-31 2013-10-15 Whirlpool Corporation Fabric treatment appliance with steam backflow device
US7905119B2 (en) 2007-08-31 2011-03-15 Whirlpool Corporation Fabric treatment appliance with steam generator having a variable thermal output
US7690062B2 (en) 2007-08-31 2010-04-06 Whirlpool Corporation Method for cleaning a steam generator
US7861343B2 (en) 2007-08-31 2011-01-04 Whirlpool Corporation Method for operating a steam generator in a fabric treatment appliance
US8555676B2 (en) 2007-08-31 2013-10-15 Whirlpool Corporation Fabric treatment appliance with steam backflow device
US7966683B2 (en) 2007-08-31 2011-06-28 Whirlpool Corporation Method for operating a steam generator in a fabric treatment appliance
US8037565B2 (en) 2007-08-31 2011-10-18 Whirlpool Corporation Method for detecting abnormality in a fabric treatment appliance having a steam generator
IT1394157B1 (en) * 2009-05-08 2012-05-25 De Longhi Appliances Srl Device for the regeneration of a water softener group in straightening equipment, relative softener group and ironing apparatus comprising such a group
FR2974121B1 (en) 2011-04-14 2013-04-26 Seb Sa Ironing appliance comprising a casing comprising a reservoir and a pump supplied in liquid by the reservoir
US9243363B2 (en) * 2012-05-10 2016-01-26 De' Longhi Appliances S.R.L. Divisione Commerciale Ariete Ironing system with iron and machine body separable

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE413218A (en) * 1936-01-09 1900-01-01
US2145287A (en) * 1936-03-31 1939-01-31 Electric Steam Sterilizing Com Electric steam generator
US2606272A (en) * 1950-08-31 1952-08-05 Franklin M Platt Vapor generator for form fitters and other apparatus
FR1113576A (en) * 1954-11-19 1956-03-30 electrical generator of pressurized steam
GB1022697A (en) * 1963-11-13 1966-03-16 Morphy Richards Cray Ltd Improvements in or relating to portable appliances for example, steam irons adapted for the heating of water
DE1628499A1 (en) * 1967-04-24 1971-03-18 Walter Becker Dampfreinigungsgeraet
US3436852A (en) * 1967-06-12 1969-04-08 Burton J Stansbury Steam generator and steam iron combination
BE511365A (en) * 1970-05-13
DE2514771B1 (en) * 1975-04-04 1976-09-02 Strobel & Soehne Gmbh & Co J steam generator
DE2900344C2 (en) * 1978-01-06 1986-09-25 Waters Associates, Inc., Milford, Mass., Us

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7753009B2 (en) 2006-10-19 2010-07-13 Whirlpool Corporation Washer with bio prevention cycle
US8393183B2 (en) 2007-05-07 2013-03-12 Whirlpool Corporation Fabric treatment appliance control panel and associated steam operations
WO2013011475A3 (en) * 2011-07-19 2014-03-06 Koninklijke Philips N.V. Domestic appliance comprising an actuator
WO2013011473A3 (en) * 2011-07-19 2014-03-06 Koninklijke Philips N.V. Domestic appliance comprising an actuator
RU2597537C2 (en) * 2011-07-19 2016-09-10 Конинклейке Филипс Н.В. Domestic appliance comprising actuator

Also Published As

Publication number Publication date
EP0135484A2 (en) 1985-03-27
DE3475826D1 (en) 1989-02-02
EP0135484A3 (en) 1985-06-05

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