EP1774224A1 - Steaming device, particularly for electric household appliances - Google Patents
Steaming device, particularly for electric household appliancesInfo
- Publication number
- EP1774224A1 EP1774224A1 EP04745210A EP04745210A EP1774224A1 EP 1774224 A1 EP1774224 A1 EP 1774224A1 EP 04745210 A EP04745210 A EP 04745210A EP 04745210 A EP04745210 A EP 04745210A EP 1774224 A1 EP1774224 A1 EP 1774224A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bottom wall
- water
- tank
- chamber
- supply
- 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
- D06F75/12—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
Definitions
- the present invention relates to a steaming device, particularly for common electric household appliances such as irons or floor cleaners.
- such devices are equipped with a boiler comprising a tank containing water to be turned into steam.
- the boiler can be integrated into the aforesaid electric appliance or it can be separate from the lat ⁇ ter and connected to it through suitable steam pipes .
- the tank is connected to a water supply duct, which supplies water into said tank.
- the duct is equipped with a supply pump connected to a thermostatic switch arranged inside the tank. When water inside the tank is fully turned into steam, the switch activates and turns on the supply pump so that it supplies again water to the tank.
- the boiler is thus cyclically filled up with water whenever it is fully emptied.
- the tank is provided with a steam outlet opening connected to the steam pipe, which as was men- tioned above is associated to the corresponding elec ⁇ tric appliance.
- control elements are further ar ⁇ ranged, which act upon the steam pipe and can be man ⁇ aged directly by the user so as to close or open the aforesaid pipe.
- an important aim of the invention is to conceive a steaming device that enables to keep a constant water level in the boiler it is provided with, so that the supplied steam has always unchanged properties .
- Another important aim of the invention is to conceive a steaming device in which heating times are further reduced with respect to the state of the art thanks to an automatic refilling of water into the boiler.
- the technical task and the aims referred to above are basically achieved by a steaming device, particularly for electric household appliances, comprising the fea ⁇ tures described in the appended claims .
- the following contains by way of non-limiting example the description of a preferred but not exclusive em ⁇ bodiment of a device according to the invention, as shown in the accompanying drawings, in which:
- Figure 1 shows a schematic view in lateral eleva ⁇ tion, partially sectioned, of a steaming device ac- cprding to the invention
- Figure 2 shows a plan view from below of a construc ⁇ tion detail of the device shown in Figure 1;
- Figure 3 shows a sectioned view in lateral elevation of a construction detail of Figure 1 according to a second embodiment.
- the steaming device according to the invention is globally referred to with number 1.
- the device 1 comprises a tank 2 defining a closed chamber 3 housing inside water to be turned into steam.
- said tank 2 has a flat bottom wall 2a having a basically horizontal development so as to collect water introduced into the chamber 3.
- the accompanying figures show a basically cylindrical tank 2 whose bottom wall 2a has a peripheral circular development.
- said shape is a mere non- limiting example and, therefore, the tank 2 and the bottom wall 2a can have any shape in accordance with the various construction requirements.
- the device 1 further has at least one outlet opening 4 for sending the generated steam to a user electric household appliance, not shown in Figure 1, for in ⁇ stance an iron.
- the outlet opening 4 is advantageously associated to t ⁇ ie tank 2 above the aforesaid bottom wall 2a and it is operatively connected to a known steam conveying duct, which shall not be described in further detail.
- the bottom wall 2a of the tank 2 is provided with heating means 5 supplying said bottom wall 2a with a given thermal energy per surface unit .
- said heating means 5 preferably com ⁇ prise an electric resistance associated to a lower surface 7 of the bottom wall 2a placed outside the chamber 3.
- the electric resistance 6 can be integrated into a plate 7a made of aluminum alloy, applied outside and with heat exchange against the lower surface 7 of the bottom wall 2a.
- the electric resistance 6 thus generates a thermal flow for heating the bottom wall 2a, which gets the aforesaid thermal energy per surface unit.
- the bottom wall 2a has a first and a second water collection portion 9, 10, separate and coplanar one with respect to the other.
- the device 1 has a partition wall 11 housed inside the chamber 3 and extending from the bottom wall 2a for separating the first portion ' 9 from the second portion 10, thus defining two separate wa ⁇ ter reservoirs. - S -
- the partition wall 11 can be basically ring-shaped so as to surround the first portion 9.
- the first portion 9 is arranged inside the second portion 10, which develops along the peripheral development of the bottom wall 2a.
- the partition wall 11 can take any shape and can define the aforesaid first portion 9 to ⁇ gether with a lateral wall of the tank 2.
- the partition wall 11 includes a ring-shaped element 11a associated to the bottom wall 2a by means of suitable hooking elements, or resting on the lat ⁇ ter.
- a conventional sealing gasket can further be pre ⁇ sent.
- the partition wall 11 can be obtained from the bottom wall 2a, suitably shaped so as to obtain a projection lib constituting the afore ⁇ said partition wall 11.
- the first and second portion 9, 10 have each upper surfaces 8, coplanar one to the other and arranged in ⁇ side the chamber 3 opposite the aforesaid lower sur ⁇ face 7.
- the upper surface 8 of the first portion 9 is smaller than the upper surface 8 of the second portion 10.
- the electric resistance 6 mainly develops on the first portion 9, so as to gen ⁇ erate a higher average thermal energy in the first portion than the average thermal energy in the second portion 10.
- the electric re ⁇ sistance 6 is basically "U"-shaped.
- the central portion of the "U"-shaped resistance is arranged on the first portion 9 of the bottom wall 2a, so as to receive a larger amount of heat with respect to its surface.
- Water is introduced into the tank 2 by means of a sup ⁇ ply source 12 operatively connected to at least one water inlet opening 13 associated to the tank 2 above the bottom wall 2a.
- the two inlet open ⁇ ings 13 each of them being placed above a correspond ⁇ ing portion 9, 10 of the bottom wall 2a. Water can thus be better supplied both in the first portion 9 and in the second portion 10.
- the two openings 13 can be adjusted so that the flow rate of the opening placed on the second portion 10 is higher, and preferably twice as much, than the flow rate of the opening placed on the first portion 9.
- the supply source 12 has a supply element 14 engaged to the inlet opening 13 for supplying water into the chamber 3.
- the supply element 14 is advantageously connected to a thermal sensor 15 placed in the first portion 9 and designed to detect water exhaustion through a given temperature rise.
- the thermal sensor 15 preferably includes a known thermo ⁇ static switch, which therefore is' not described in further detail, associated to the bottom wall 2a (see Figure 2) .
- the supply element 14 includes a water reservoir 16, connected to the tank 2 by means of a supply duct 17.
- the supply duct 17 has a first end 17a associated to the aforesaid reservoir 16, and a second end 17b en ⁇ gaged to the inlet opening 13 for putting into fluid communication the reservoir 16 with the chamber 3 of the tank 2.
- the duct 17 advantageously has two second ends 17b, each of them being associated to a corresponding inlet opening 13.
- the water flow coming from the reservoir 16 is split up between the two second ends 17b of the afore ⁇ said duct 17 by means of a pump 18 mounted inside the duct 17 between the first end and the second ends 17a, 17b.
- the pump 17 is controlled by a thermal sensor 15 so as to allow water to pass only when said thermal sensor detects a given temperature rise due to the substantial exhaustion of water con ⁇ tained in the first portion 9.
- the heating means 5 further comprise an auxiliary thermal sensor 19, which preferably also includes a thermostatic switch.
- the auxiliary sensor 19 is arranged near the resistance 6 and is adjusted so as to interrupt electric supply to the latter upon reach ⁇ ing of a pre-established safety temperature.
- the supply ele ⁇ ment 14 fills the chamber 3 up to a pre-established level, generating steam immediately and simultaneously to the rise of water level.
- the initial absence of water causes a sudden temperature rise in the first portion 9 and thus the activation of the pump 18 by the sensor 15.
- the amount of water getting in through an inlet open ⁇ ing 13 and falling into the first portion 9 cools the upper surface 8 and rapidly heats up and evaporates, whereas the amount of water introduced into the second portion 10 of the bottom wall 2a heats up.
- the cooling of the first portion 9 of the bottom wall 2a, detected by the sensor 15, makes the pump 18 stop until a new temperature rise causes a second start of the pump 18.
- a series of steps of de-activation and activation of the pump 18 follows in the same way, during which the first portion 9 undergoes alternating conditions of minimum water level and partial filling, whereas water in the second portion 10 progressively rises up to the pre-established level as defined by the height of the partition wall 11 separating the two portions.
- water in excess falls into the first portion 9 and cools its upper surface 8, thus making the pump 18 stop.
- the heating and evaporation of water fallen into the first portion 9 causes a new start of the pump 18, and thus steps of stop and activation of the pump 18 follow up one an ⁇ other, thus keeping water level in the chamber 3 con ⁇ stantly at the same height as the partition wall 11.
- the invention has important advantages . First of all, it should be pointed out that dead times required for heating water introduced into the chamber 3 are completely eliminated.
- the first portion 9 having always a high thermal energy continuously turns water into steam, and as soon as water inside the first portion gets exhausted (minimum level) , new water is intro ⁇ quizd by means of the sensor 15. During this step, wa ⁇ ter inside the second portion heats up and is turned into steam.
- the partition wall 11 enables water to over ⁇ flow from the second to the first portion, so as to keep a basically constant water level in the chamber 3, thus obtaining steam with accordingly constant properties.
- the device according to the invention enables a simple and accu ⁇ rate control of water level in the chamber 3, thus re ⁇ ducing tank size though generating steam with constant properties.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2004/000387 WO2006006187A1 (en) | 2004-07-12 | 2004-07-12 | Steaming device, particularly for electric household appliances |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1774224A1 true EP1774224A1 (en) | 2007-04-18 |
EP1774224B1 EP1774224B1 (en) | 2010-10-27 |
Family
ID=34958254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04745210A Not-in-force EP1774224B1 (en) | 2004-07-12 | 2004-07-12 | Steaming device, particularly for electric household appliances |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1774224B1 (en) |
AT (1) | ATE486247T1 (en) |
DE (1) | DE602004029824D1 (en) |
WO (1) | WO2006006187A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2350210B1 (en) * | 2008-09-22 | 2011-11-16 | Bsh Krainel, S.A | DOMESTIC APPLIANCE WITH A FULL STEAM BOILER AND STEAM BOILER FOR A DOMESTIC APPLIANCE |
EP2287381A1 (en) | 2009-08-17 | 2011-02-23 | BSH Bosch und Siemens Hausgeräte GmbH | Steam generator for use in a laundry appliance, and laundry appliance |
WO2011127620A1 (en) * | 2010-04-12 | 2011-10-20 | Sun Cupid Industries Ltd. | Boiler |
CN104075304B (en) * | 2014-07-04 | 2016-01-13 | 深圳市银星智能科技股份有限公司 | A kind of steam generating system and intelligent cleaning robot |
CN105135399B (en) * | 2015-09-30 | 2017-07-04 | 广东新宝电器股份有限公司 | A kind of steam raising plant and ironing apparatus |
CN105476554B (en) * | 2015-11-11 | 2017-09-26 | 中山汇尔吉自动化设备有限公司 | Hand push fuel-steam cleaning machine |
CN105249897B (en) * | 2015-11-11 | 2019-11-05 | 江苏瑞特钢化玻璃制品有限公司 | Household steam cleaning machine |
US11618992B2 (en) | 2017-06-16 | 2023-04-04 | Spectrum Brands, Inc. | Steam generator with pre-heat chamber and filter |
WO2019102407A1 (en) * | 2017-11-23 | 2019-05-31 | I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini | Steam generation system for use in household appliance |
DE102020113674A1 (en) | 2020-05-20 | 2021-11-25 | Miele & Cie. Kg | Method and control unit for providing steam in a steam boiler for an ironing device, steam supply device and ironing device |
CN113576347A (en) * | 2021-08-09 | 2021-11-02 | 四川启睿克科技有限公司 | Method and equipment for cleaning mop of cleaning robot by using laundry wastewater |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4443798C1 (en) * | 1994-12-08 | 1996-03-21 | Kaercher Gmbh & Co Alfred | Steam cleaning device for domestic use |
IT1288957B1 (en) * | 1996-07-26 | 1998-09-25 | Esse 85 Srl | STEAM GENERATOR FOR IRON OR SIMILAR |
-
2004
- 2004-07-12 WO PCT/IT2004/000387 patent/WO2006006187A1/en active Application Filing
- 2004-07-12 EP EP04745210A patent/EP1774224B1/en not_active Not-in-force
- 2004-07-12 DE DE602004029824T patent/DE602004029824D1/en active Active
- 2004-07-12 AT AT04745210T patent/ATE486247T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2006006187A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE486247T1 (en) | 2010-11-15 |
DE602004029824D1 (en) | 2010-12-09 |
WO2006006187A1 (en) | 2006-01-19 |
EP1774224B1 (en) | 2010-10-27 |
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