EP1366228A1 - Pulsed steam iron - Google Patents
Pulsed steam ironInfo
- Publication number
- EP1366228A1 EP1366228A1 EP02711149A EP02711149A EP1366228A1 EP 1366228 A1 EP1366228 A1 EP 1366228A1 EP 02711149 A EP02711149 A EP 02711149A EP 02711149 A EP02711149 A EP 02711149A EP 1366228 A1 EP1366228 A1 EP 1366228A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- iron
- valve
- water
- vaporization chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
Definitions
- the present invention relates to steam irons where the vaporization of water is almost instantaneous.
- Steam irons are generally known comprising a water reservoir, a heated vaporization chamber for rapidly evaporating the water which reaches it drop by drop from the reservoir, a heated soleplate comprising the ironing surface, steam outlet holes being arranged in the sole.
- the simplest irons have an adjustable flow valve through which water falls from the tank into the vaporization chamber under the effect of gravity.
- the steam produced leaves the iron to the atmosphere through channels and outlet holes constituting a steam exhaust circuit.
- the vapor occupies a large volume and travels through the exhaust system at high speed.
- pressure of the vapor in the vaporization chamber increases.
- the steam outlet through the holes in the soleplate is hindered and the pressure in the vaporization chamber increases further.
- This internal pressure in the vaporization chamber prevents the passage of water through the adjustable flow valve, which significantly reduces the next quantity of steam produced.
- the internal overpressure cannot exceed a value corresponding to the height of the water column between the water outlet of the valve and the water level in the tank, generally a few centimeters. Therefore the amount of steam varies greatly during ironing, depending on the fabrics and the ironing support.
- the pressure drops being proportional to the square of the speed of the steam in the circuit, the speed is limited, in particular the speed of exit through the holes in the soleplate, which can be a disadvantage for the penetration of steam into the fabrics.
- Patent JP01262899 describes an iron comprising an over-steam valve, the control rod of which is controlled by an electromagnet.
- the valve is actuated periodically to produce an excess of steam so as to clean the steam chamber. Overpressure occurs when the valve closes.
- this device is not intended to continuously obtain a powerful vapor.
- the object of the invention is achieved by an iron comprising a reservoir of water at atmospheric pressure, the water in the reservoir flowing through a nozzle between this reservoir and a heated and regulated vaporization chamber, a soleplate comprising the ironing surface, steam outlet holes being made in the soleplate, remarkable in that the iron comprises means bringing into resonance or relaxation vibration the water and steam circuit, the cyclic variation of the pressure of steam being self-sustaining at an average pressure higher than that corresponding to the water column available in iron.
- Figure 1 in the appendix shows how a surprisingly such an iron is obtained.
- This figure is a graph of the mass flow rate Q of steam in grams per minute as a function of the total section S in square millimeters of the steam outlet orifices, for different diameters of passage of the nozzle of a prototype. The diameters are marked on each curve.
- the phenomenon is not clearly explained. Partly, one can think that the vapor chamber behaves with the exit holes like a resonant Helmholtz cavity which would be excited by the vaporization of water. In part, one might think that the implosions of steam in the tank just above the valve force the water forcefully into the chamber like a pump would. As the vaporization chamber is a cavity which is not designed to have a low resonance frequency from the acoustic point of view, one can think that the phenomena combine and that when enough energy can be maintained in the resonator thus constituted , it oscillates while generating significant overpressures which cause high average pressure.
- the overpressure is obtained for a value of the steam outlet section less than a critical value.
- the start of the described operating mode is obtained by a jolt or a sudden opening of the nozzle. Operation can then have instability, which can be explained by an excessive loss of energy through the outlet holes, or by great difficulty in converting the pressure energy into sufficient kinetic energy. This energy is normally responsible for creating a temporary depression in the room and for sucking water through the nozzle.
- m is between 1.5 and 3.5, preferably 2.5 n is between 2 and 4.5, preferably 3, 5 p is between 1 and 2, preferably 1.25 q is between 7 and 10, preferably 8.
- the nozzle consists of the passage of an adjustable flow valve.
- the steam outlet section is chosen to suit a wide range of valve openings, so as to maintain flow control easily possible in the operating mode described.
- the iron has a non-return valve between the reservoir and the vaporization chamber.
- the non-return valve has the advantage of preventing steam from returning to the water tank, and therefore its slow heating.
- the valve and the adjustable valve can advantageously be combined to form only one sub-assembly. In this version, the operation seemed at first to be much more critical with the known vaporization chambers and steam circuits. In fact, the non-return valve eliminates the small implosions described above.
- the steam circuit has elongated passages where the steam circulates at high speed which constitute with the valve and the vaporization a stable oscillating vapor circuit.
- the operating frequency is not equal to the acoustic resonance frequency of the steam circuit because the high pressure lasts until the water suddenly admitted is not completely evaporated. Also it is enough that the circuit has enough energy to open the valve at the end of evaporation for the system to work.
- the drip followed by a valve comprises a module closing a large passage intended to let a large flow of water pass more quickly and pierced with the orifice proper of the drip.
- the orifice is gradually released by a needle rod in the first part of its control stroke and the greatest water and vapor flow rates are obtained in a second part of the stroke of the rod or the module is gradually raised.
- the presence of the valve increases the curvature to the left and at the bottom of a curve A similar to that visible in FIG. 1, and decreases the flow rate with equal orifice section and steam outlet. , so that operation at low flow Q does not allow self-ignition of the oscillations.
- the presence of the valve therefore requires larger openings at equal flow rate than the first version described. It also moves the upper part of the stability curve A to the right of the diagram. Stability is improved for large orifice openings and high flow rates, which can be explained by the absence of return and therefore of energy losses in the tank.
- the steam outlet section S may be larger.
- the iron comprises a valve with a fixed passage acting as a nozzle between the reservoir and the vaporization chamber.
- the iron further comprises a valve for adjusting the steam flow located on the steam circuit.
- FIG. 1 is, as we have already seen, a diagram of the characteristic curves of the mass flow rate of steam of an iron according to the invention as a function of the steam outlet.
- FIG. 2 is a diagram of the characteristic curves of the mass flow rate of steam of an iron according to the invention as a function of the steam outlet in the vicinity of the operation at constant steam outlet S0.
- FIG. 3 is the diagram of the characteristic curve of the mass vapor flow rate of an iron according to the invention having a maximum and constant water inlet passage as well as a variable steam outlet section.
- Figure 4 is a longitudinal sectional view of an iron according to a first version of the invention.
- Figure 5 is a section showing the drip and the valve of an iron according to a second version of the invention.
- Figure 6 is a longitudinal sectional view of an iron according to a second version of the invention.
- Figure 7 is a detail view in longitudinal section of an iron according to a third version of the invention.
- Figure 8 is a longitudinal sectional view of an iron according to a third version of the invention.
- FIG. 9 is a diagram of the characteristic curves of a variant of an iron according to the invention representing the mass flow rate of steam as a function of the steam outlet.
- Figure 10 is a section showing the drip and the valve of a variant of the invention.
- the iron 1 comprises a water tank 2, a soleplate 3 in thermal connection with a heating body 4 including a vaporization chamber 5 closed by a plate 6 and provided with a heating element 7.
- the body 4 is regulated in temperature by a thermostat 22.
- a drip device 8 provides a passage for water from the reservoir 2 to the vaporization chamber 5.
- the drip has an orifice 9 whose section can be reduced by a needle 10.
- the vapor produced in the instantaneous vaporization chamber 5 is collected by passages or channels 11. It escapes into the atmosphere by one or more calibrated passages 12.
- the vapor is then distributed under the sole 3 by a distribution chamber 13 from which it escapes through the holes 14 of the sole to the fabric to be ironed.
- FIG. 1 corresponding to the prototype, it can be seen that by reducing the cross-section S of the orifices 12 sufficiently, operating modes are obtained which include a pulsating component and correspond both to maximum steam and pressure flow rates. internal vapor average. These regimes have a spontaneous and stable functioning when the values are chosen to the left of the dashed curve A on the diagram.
- the point M then represents the operation where the vaporization is maximum.
- the section S0 is chosen in relation to the curve C0 so that this point M is located in the stability zone.
- the section S0 is chosen to be equal to 13 mm 2 and the drip has a maximum passage section of 1, 5 mm 2 , the spontaneous oscillatory operation being obtained in this construction for values of S0 less than 24 mm2.
- the operating point m moves on the diagram of figure 2 leaving vertically the curve C0 to approach the x-axis parallel to the ordinate axis.
- the section S0 is chosen so that in this operation the displacement of the operating point cuts a maximum of characteristic curves in the stability zone to allow adjustment without risk.
- valve to the water inlet orifice as indicated in FIG. 5.
- the valve is for example constituted by a ball 15 arranged in a bore in tip of the nozzle 9. Normally opened by the weight of the ball, the valve lets water pass from the reservoir 2 as long as the pressure in the chamber 5 is low, and then closes.
- the channels 11 are elongated and calibrated with the same care as the outlet orifices 12 so that the high speeds of movement relate to more steam.
- the system At the end of evaporation of the water previously admitted into the chamber, the system then has more energy to create a vacuum in the chamber 5 and open the valve.
- the channels 11 then have their inlet 16 remote from the outlet through the orifices 12.
- the length of the channels 11 can be further increased, for example by a tube 17 wound and having an inlet in the chamber 5, as can be seen in Figure 7.
- the iron is an iron similar to that of FIG. 4 but equipped with a drip with a wide passage and with a valve 15 visible in FIG. 10.
- the outlet section of steam, marked S0 on an equivalent of FIG. 2 is reduced only so that the spontaneous initiation of the oscillations is obtained for an average opening of the orifice 9 of the drip.
- the silicone elastomer valve 15 placed in series with the drip is advantageously very light. It has a large surface, facing the vaporization chamber, on which the vapor pressure can be applied to close it easily.
- the drip can, as an option, comprise a module 25 carrying the orifice 9, said module lifting up at the end of the opening stroke of the needle 10, to release more quickly a greater passage to the water from the reservoir.
- the section S0 is chosen equal to 40 mm 2 and the drip has a maximum passage section of 1, 8 mm2 while the module is in its seat, and 25 mm 2 when the module is completely raised.
- the oscillation operation is spontaneous for a section of the steam passages S0 which can be up to 60 mm 2 .
- the user sets the steam flow to a low level.
- the operating point is located between the points MO and M1.
- the iron then operates in a conventional manner, without pressure oscillations.
- she wants to iron difficult fabrics, with a lot of very energetic steam she increases the flow with the bushel control.
- the iron then changes its speed, the operating point m crosses the limit line for stability and self-priming A at point M1, and is located between points M1 and M in the diagram in Figure 9.
- At most the operating point m is located at M on the curve C0 corresponding to the maximum opening of the valve orifice.
- the iron works with oscillations whose frequency is around 20 to 30 pulsations per minute for a prototype produced.
- the steam exiting at high speed is very penetrating and effective.
- the prototype thus equipped with a large water inlet orifice and a valve, delivers 35 grams of steam per minute when the iron is lifted, and another 32 grams per minute when it is applied to the fabric to be ironed.
- the vapor flow therefore varies greatly little with the ironing conditions.
- the steam circuit is provided with a steam flow control 20 consisting for example of a needle or a valve acting at the junction of the channels 11 with the orifices 12.
- the passage of water in the orifice 9 being constant, only one of the characteristic curves similar to those previously described is used, for example the curve C0 in FIG. 3 corresponding to the maximum of the vaporization possibilities.
- the adjusting device 20 being in full opening, it corresponds to point Sm of the characteristic of the output and to point M of operation.
- the channels 11 are calibrated so that this operating point at full power is located in the stability zone.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Irons (AREA)
- Magnetic Treatment Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0102676A FR2821369B1 (en) | 2001-02-27 | 2001-02-27 | PULSED STEAM IRON |
FR0102676 | 2001-02-27 | ||
PCT/IB2002/000448 WO2002068748A1 (en) | 2001-02-27 | 2002-02-14 | Pulsed steam iron |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1366228A1 true EP1366228A1 (en) | 2003-12-03 |
EP1366228B1 EP1366228B1 (en) | 2005-03-16 |
Family
ID=8860511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02711149A Expired - Lifetime EP1366228B1 (en) | 2001-02-27 | 2002-02-14 | Pulsed steam iron |
Country Status (12)
Country | Link |
---|---|
US (1) | US6807756B2 (en) |
EP (1) | EP1366228B1 (en) |
JP (1) | JP4067968B2 (en) |
CN (1) | CN1263918C (en) |
AT (1) | ATE291118T1 (en) |
DE (1) | DE60203268T2 (en) |
ES (1) | ES2237666T3 (en) |
FR (1) | FR2821369B1 (en) |
HK (1) | HK1057586A1 (en) |
MX (1) | MXPA03007448A (en) |
RU (1) | RU2248420C1 (en) |
WO (1) | WO2002068748A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2330698B1 (en) * | 2006-10-24 | 2010-09-21 | Bsh Krainel, S.A. | STEAM IRON. |
ES2360994B1 (en) * | 2008-08-22 | 2012-04-19 | Bsh Electrodomésticos España, S.A. | STEAM IRON. |
EP2213783A1 (en) * | 2009-01-28 | 2010-08-04 | Koninklijke Philips Electronics N.V. | Steam iron |
JP6461109B2 (en) * | 2013-07-25 | 2019-01-30 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | Equipment for generating steam |
JP6767360B2 (en) * | 2014-08-26 | 2020-10-14 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | Steam device with noise generator |
CN106222981B (en) * | 2016-09-05 | 2018-06-08 | 深圳市鑫汇科股份有限公司 | Electromagnetic induction electric iron system |
CN117752251A (en) * | 2022-09-23 | 2024-03-26 | 苏州宝时得电动工具有限公司 | Handheld steam cleaning device and control method |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2596684A (en) * | 1945-12-03 | 1952-05-13 | Richard L Hedenkamp | Steam electric iron |
US2782537A (en) * | 1954-06-29 | 1957-02-26 | Vera-Mege Rafael | Steam pressing iron |
US3002302A (en) * | 1957-06-19 | 1961-10-03 | Gen Electric | Liquid spray steam iron |
US3703043A (en) * | 1970-07-21 | 1972-11-21 | Matsushita Electric Ind Co Ltd | Steam iron |
FR2626901B1 (en) * | 1988-02-10 | 1990-06-29 | Seb Sa | STEAM IRON COMPRISING AN IMPROVED DEVICE FOR SUPPLYING WATER TO THE VAPORIZATION CHAMBER |
JP2574381B2 (en) * | 1988-04-12 | 1997-01-22 | 松下電器産業株式会社 | Steam iron |
US5010664A (en) * | 1988-11-18 | 1991-04-30 | Matsushita Electric Industrial Co., Ltd. | Steam iron having a solenoid driven pump and heated evaporation chamber for providing steam and operable for further providing extra steam at specified intervals |
US5430963A (en) * | 1993-11-23 | 1995-07-11 | Kuo-Chu; Chien | Iron including pressurizing and emitting steam chambers and remote reservoir |
DE19524333C1 (en) * | 1995-07-04 | 1996-08-14 | Rowenta Werke Gmbh | Domestic steam iron |
DE10224549A1 (en) * | 2002-05-31 | 2003-12-18 | Braun Gmbh | steam iron |
-
2001
- 2001-02-27 FR FR0102676A patent/FR2821369B1/en not_active Expired - Fee Related
-
2002
- 2002-02-14 ES ES02711149T patent/ES2237666T3/en not_active Expired - Lifetime
- 2002-02-14 WO PCT/IB2002/000448 patent/WO2002068748A1/en active IP Right Grant
- 2002-02-14 CN CNB028056000A patent/CN1263918C/en not_active Expired - Fee Related
- 2002-02-14 AT AT02711149T patent/ATE291118T1/en not_active IP Right Cessation
- 2002-02-14 RU RU2003128995/12A patent/RU2248420C1/en not_active IP Right Cessation
- 2002-02-14 JP JP2002567640A patent/JP4067968B2/en not_active Expired - Fee Related
- 2002-02-14 MX MXPA03007448A patent/MXPA03007448A/en active IP Right Grant
- 2002-02-14 US US10/469,120 patent/US6807756B2/en not_active Expired - Lifetime
- 2002-02-14 DE DE60203268T patent/DE60203268T2/en not_active Expired - Lifetime
- 2002-02-14 EP EP02711149A patent/EP1366228B1/en not_active Expired - Lifetime
-
2004
- 2004-01-27 HK HK04100527A patent/HK1057586A1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO02068748A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1505716A (en) | 2004-06-16 |
DE60203268D1 (en) | 2005-04-21 |
FR2821369A1 (en) | 2002-08-30 |
JP2004527288A (en) | 2004-09-09 |
ES2237666T3 (en) | 2005-08-01 |
US6807756B2 (en) | 2004-10-26 |
EP1366228B1 (en) | 2005-03-16 |
WO2002068748A1 (en) | 2002-09-06 |
MXPA03007448A (en) | 2003-12-04 |
US20040128873A1 (en) | 2004-07-08 |
JP4067968B2 (en) | 2008-03-26 |
CN1263918C (en) | 2006-07-12 |
ATE291118T1 (en) | 2005-04-15 |
DE60203268T2 (en) | 2006-02-02 |
HK1057586A1 (en) | 2004-04-08 |
FR2821369B1 (en) | 2003-09-05 |
RU2248420C1 (en) | 2005-03-20 |
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