EP0696706A1 - Sicherheitsvorrichtung für Dampferzeuger - Google Patents

Sicherheitsvorrichtung für Dampferzeuger Download PDF

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Publication number
EP0696706A1
EP0696706A1 EP94830397A EP94830397A EP0696706A1 EP 0696706 A1 EP0696706 A1 EP 0696706A1 EP 94830397 A EP94830397 A EP 94830397A EP 94830397 A EP94830397 A EP 94830397A EP 0696706 A1 EP0696706 A1 EP 0696706A1
Authority
EP
European Patent Office
Prior art keywords
vessel
boiler
lid
vaporiser
fluid
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.)
Withdrawn
Application number
EP94830397A
Other languages
English (en)
French (fr)
Inventor
Giuseppe Giannelli
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.)
VELTRO S.R.L.
Original Assignee
VELTRO 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
Application filed by VELTRO Srl filed Critical VELTRO Srl
Priority to EP94830397A priority Critical patent/EP0696706A1/de
Publication of EP0696706A1 publication Critical patent/EP0696706A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/12—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water supplied to the iron from an external source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
    • F22B1/285—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs the water being fed by a pump to the reservoirs

Definitions

  • the present invention relates to apparatus for generating vapour.
  • Household appliances which use steam-generating apparatus are known, such as, for example, ironing appliances or machines for washing floors, windows and the like.
  • appliances for generating steam for domestic use mainly consist of a boiler constituted by a sealed vessel housing an electrical resistance.
  • the boiler has an opening, closed by a cap, for filling the vessel with water.
  • the electrical resistance causes the water in the vessel to evaporate until a predetermined pressure builds up in the boiler.
  • the steam which forms in the vessel is drawn off by means of a solenoid valve activated by an external control and flows through a tube to the appliance requiring it.
  • This appliance may be an iron with a soleplate provided with outlet holes for the steam or a nozzle for the outlet of steam for cleaning floors, windows and the like.
  • mechanical safety devices may be rendered inoperative by lime blocking the tiny ducts through which the steam is discharged.
  • Electrical safety devices may be rendered inoperative by a fall or a knock, which could happen to the appliance either while being carried or during use.
  • the object of the present invention is to provide vapour-generating apparatus that satisfies this safety requirement.
  • vapour-generating apparatus which includes a boiler into which fluid is introduced for evaporation and in which the fluid is evaporated by a heat source and from which the vapour generated is drawn for use, characterised in that the boiler comprises a vessel closed by a lid and in that the vessel and the lid are securely fixed together by resilient closure means which exert a predetermined resilient closure pressure on the lid which allows the lid to be raised in the event of excessive pressure to discharge the vapour to the exterior.
  • the boiler of the apparatus according to the invention illustrated in Figure 1 and generally indicated 10, includes a vessel 11, a lid 12 for closing the vessel and an electrical resistance 13 housed in the vessel.
  • the vessel 11 and the lid 12 are securely fixed together by a series of bolts which exert a clamping action through springs.
  • a series of holes 14 is formed around a rim 11A of the vessel 11 and a corresponding series of holes 15 is formed around a corresponding rim of the lid 12 so that, when the lid 12 is fitted on the vessel 11, each hole 15 is aligned with a respective hole 14; a screw 16 is fitted through each pair of holes 14, 15 until its head, which is uppermost, bears against the lid and a spring 17 is then fitted onto its shank, of which only the end portion is threaded, the remaining part being smooth and then a nut 18 is screwed in.
  • the nut 18 is tightened so as to compress the spring 17 and thus clamp the lid 12 resiliently against the rim 11A of the vessel 11 since, because the spring acts on the nut and reacts against the inner surface of the rim 11A it transmits a resilient force, directed towards the vessel, to the head of the screw 16 through its shank.
  • a seal 19 is provided between the vessel 11 and the lid 12.
  • the electrical resistance 13 is sealingly fixed to the lid 12.
  • a short connector tube 20 is also sealingly fixed to the lid 12 puts the inside of the vessel 11 into communication with the outside; a closure cap 21 is screwed onto this tube 20.
  • the vessel 11 also houses a thermometric probe 22, also sealingly fixed to the lid 12, for measuring the temperature inside the vessel.
  • the resistance 13 and the thermometric probe 22 are electrically connected to an electronic supply and control unit 23.
  • the electronic unit 23 is controlled by an external push-button 24 by which steam can be released.
  • An external indicator 44 is also connected to the unit 23 for warning of abnormal conditions, this indicator being either acoustic and/or light-emitting.
  • the vessel 11 houses a dip tube 25, also sealingly fixed to the lid 12.
  • the dip tube 25 is connected, by means of an additional tube 26, to the suction side of a pump 27 which may, for example, be of an electromagnetic type operated by a series of electrical pulses.
  • the delivery of the pump 27 is connected to the inlet of a vaporiser 29 by means of a tube 28.
  • the outlet of the vaporiser 29 is connected to ateil appliance through a first tube 30 and a second tube 31.
  • the tubes 30 and 31 are connected to each other by a "T" connector 32 with the tubes 31 and 32 fitted to the branches of the head of the T and the stem fixed to the lid 12 of the vessel 11.
  • a non-return ball valve is mounted inside the connector 32.
  • Figure 5 illustrates in detail the vaporiser 29.
  • This is formed by a body 34 containing two electrical resistances 35 and having a face 36 rebated into it with dividing ridges 37.
  • a lid 38 is sealingly fixed to the body 34 over the rebated face 36.
  • the face 36, the ridges 37 and the lid 38 define a sort of tortuous, substantially laminar duct communicating at one end with the inlet and at the other with the outlet of the vaporiser 29.
  • the body 34 also contains a thermometric probe 39.
  • the pump 27 is electrically powered by an electronic supply and control unit 40.
  • the electronic unit 40 is controlled in turn by an external push-button 41 for activating the pump 27 and by a knob 42 for regulating the delivery of the pump.
  • the resistances 35 and the probe 39 associated with the vaporiser 29 are connected, on the other hand, to an electronic thermostat 43.
  • the steam-generating apparatus illustrated in Figure 4 operates as follows.
  • the boiler 10 must be filled with fluid to be evaporated, which in the present example is water. This is done by unscrewing the cap 21, pouring water into the vessel 11 through the tube 20 and screwing the cap 21 back on.
  • fluid to be evaporated which in the present example is water.
  • Switching on the apparatus activates the electronic unit 23 which supplies the electrical resistance 13 until the water reaches a temperature just below its boiling point, for example a temperature of between 95°C and 98°C, and cuts off power when the thermometric probe 22 indicates that the water has reached this temperature. Once this temperature has been reached, the electronic unit 23 maintains it by switching the electrical resistance 13 on or off according to the readings of the thermometric probe 22.
  • a temperature just below its boiling point for example a temperature of between 95°C and 98°C
  • the switching on of the apparatus also activates the electrical resistances 35 of the vaporiser 29.
  • the electronic thermostat 43 by measuring the temperature by means of the thermometric probe 39, causes the body 34 of the vaporiser 29 to reach and maintain a temperature far higher than the boiling point of the water, a temperature, for example, of between 150°C and 160°C.
  • the apparatus described can give more steam, at a greater pressure, than that generated in the boiler 10.
  • the push-button 41 is pressed instead of the push-button 24.
  • This causes the electronic unit 40 to activate the pump 27 with its delivery controlled by the regulator knob 42.
  • the pump 27 draws water from the boiler 10, at a temperature just below its boiling point, through the tubes 25 and 26 and delivers it through the tube 28 to the evaporator 29.
  • the evaporator by virtue of the high temperature and the tortuous, laminar duct, the water temperature rises sharply and more steam, under greater pressure, is generated than that generated in the boiler 10.
  • This steam is forced by the pressure through the tubes 30 and 31 to theteil appliance.
  • the non-return valve 33 prevents the steam from entering the boiler 10.
  • the boiler meets with the most stringent safety requirements.
  • the lid 12 is raised slightly from the vessel 11 by the pressure itself overcoming the action of the springs 17, thus releasing steam and returning the pressure in the boiler to normal, as shown in sequence in Figures 2 and 3.
  • the resilient load put on the springs 17 by the nuts 18 is calibrated so that the lid 12 is raised at a predetermined level of excess pressure.
  • the electronic unit 23 ensures that no steam forms in the boiler by maintaining the water below its boiling point, thus offering an additional safety feature.
  • the electronic unit 23 would detect an abnormal increase in temperature by means of the thermometric probe 22, and would switch off the electrical resistance 13 and switch on the warning indicator 44.
  • the boiler does not normally contain pressurised steam means that it may be opened for refilling it with water without any delay as there is no danger of a violent discharge of steam.
  • the fact that the water in the boiler is normally at a temperature close to its boiling point means that, when required, steam is available very quickly as the temperature need only be raised very slightly.
  • the availability of more steam at a greater pressure is a definite advantage to satisfy different requirements.
  • the regulator knob 42 it is also possible to adjust the quantity and the pressure of the steam as, by means of the electronic unit 40, this regulator knob 42 varies the delivery of the pump 27 and thus the quantity of hot water reaching the vaporiser 29 and being vaporised.
  • FIG 6 shows the steam-generating apparatus of Figure 4 used in a household appliance for washing floors and the like, generally indicated 50.
  • This appliance 50 includes a trolley 51 with a box-shaped body housing the aforesaid apparatus.
  • the tube 31 of the apparatus is connected to a nozzle 53 which discharges the steam onto the surface to be treated and which constitutes theteil device.
  • Apertures 52 are provided in the underside of the body of the trolley 51 for the steam released from the boiler 10 to be discharged should the lid 12 be raised owing to excess pressure in the boiler.
  • FIG. 7 shows a simplified version of the aforesaid apparatus being used in a household ironing appliance, generally indicated 60.
  • This simplified version has no vaporiser 90 or associated hydraulic and electrical circuits (pump 27, tubes 25, 26, 28, 30, electronic unit 40, push-button 41, knob 42, electronic thermostat 43).
  • the simplified apparatus is housed in a base 61 of the appliance 60 on which an iron 62 rests.
  • the tube 20 for filling the boiler with water has a nozzle 45 to which is connected a tube 46 which connects externally to the iron 62; the steam generated in the boiler 10 thus reaches the iron through the nozzle 45 and the tube 46 and is discharged through holes in the soleplate of the iron.
  • Apertures 63 are formed in the underside of the base 61 for discharging steam released from the boiler 10 when excessive pressure raises the lid 12.
  • the electronic unit 23 and associated external controls enable the quantity of steam to be adjusted according to the type of material being ironed, with the electrical resistance 13 switched off if there is too much steam.
  • the simplified apparatus without vaporiser could be used in the floor-washing appliance 50 while the apparatus with vaporiser could be used in the ironing appliance 60.
  • the boiler may have any shape whatever.
  • More electrical resistances may be provided.
  • the vaporiser may also be shaped differently and have a different number of electrical resistances or a different type of heat source.
  • the lid may be resiliently clamped to the boiler vessel in any way which provides for resilient closure as described above.
  • an equivalent bolt system or a system of resilient clips or the like may be used.
  • a single electronic supply and control unit may be provided to control the boiler, the pump and the vaporiser.
  • the pump for delivering hot fluid to the vaporiser may be of any type.
  • Switches may be used instead of push-buttons to control the steam.
  • the apparatus described and illustrated may be used in any household appliance requiring steam, either in its simplified version without the vaporiser or in the version with vaporiser.
  • the apparatus of the invention may also be used outside the domain of household appliances and may be adapted, making obvious modifications, to suit any professional or industrial appliance requiring steam.
  • any type of fluid may be used.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Textile Engineering (AREA)
  • Cookers (AREA)
EP94830397A 1994-08-08 1994-08-08 Sicherheitsvorrichtung für Dampferzeuger Withdrawn EP0696706A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94830397A EP0696706A1 (de) 1994-08-08 1994-08-08 Sicherheitsvorrichtung für Dampferzeuger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94830397A EP0696706A1 (de) 1994-08-08 1994-08-08 Sicherheitsvorrichtung für Dampferzeuger

Publications (1)

Publication Number Publication Date
EP0696706A1 true EP0696706A1 (de) 1996-02-14

Family

ID=8218504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830397A Withdrawn EP0696706A1 (de) 1994-08-08 1994-08-08 Sicherheitsvorrichtung für Dampferzeuger

Country Status (1)

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EP (1) EP0696706A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2947892A1 (fr) * 2009-07-10 2011-01-14 Seb Sa Appareil electromenager comportant un generateur de vapeur
EP3285003A3 (de) * 2016-06-16 2018-03-14 Chi Kin Chan Verdampfungsvorrichtung sowie dampfbügeleisen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436852A (en) * 1967-06-12 1969-04-08 Burton J Stansbury Steam generator and steam iron combination
US4320702A (en) * 1980-03-20 1982-03-23 Refreshment Machinery Incorporated Steam generator
FR2565674A1 (fr) * 1984-06-06 1985-12-13 Siporex Francais Chaudiere electrique a echangeur mineral thermiquement selective.
DE3627988A1 (de) * 1985-10-21 1987-04-23 Tech Mikroelektronik Forsch Kleindampferzeuger fuer industrie und haushalt
WO1988000316A1 (en) * 1986-06-24 1988-01-14 Tecator Ab Steam generator for analytical instruments
EP0422653A2 (de) * 1989-10-11 1991-04-17 Applied Materials, Inc. Verfahren und Vorrichtung zur Dampferzeugung und deren Verwendung
EP0533358A1 (de) * 1991-09-14 1993-03-24 Black & Decker Inc. Dampferzeuger

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436852A (en) * 1967-06-12 1969-04-08 Burton J Stansbury Steam generator and steam iron combination
US4320702A (en) * 1980-03-20 1982-03-23 Refreshment Machinery Incorporated Steam generator
FR2565674A1 (fr) * 1984-06-06 1985-12-13 Siporex Francais Chaudiere electrique a echangeur mineral thermiquement selective.
DE3627988A1 (de) * 1985-10-21 1987-04-23 Tech Mikroelektronik Forsch Kleindampferzeuger fuer industrie und haushalt
WO1988000316A1 (en) * 1986-06-24 1988-01-14 Tecator Ab Steam generator for analytical instruments
EP0422653A2 (de) * 1989-10-11 1991-04-17 Applied Materials, Inc. Verfahren und Vorrichtung zur Dampferzeugung und deren Verwendung
EP0533358A1 (de) * 1991-09-14 1993-03-24 Black & Decker Inc. Dampferzeuger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2947892A1 (fr) * 2009-07-10 2011-01-14 Seb Sa Appareil electromenager comportant un generateur de vapeur
EP2423581A3 (de) * 2009-07-10 2014-07-02 Seb S.A. Elektrisches Haushaltsgerät, das einen Dampferzeuger umfasst
EP3285003A3 (de) * 2016-06-16 2018-03-14 Chi Kin Chan Verdampfungsvorrichtung sowie dampfbügeleisen

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