WO2008075308A2 - Générateur de vapeur - Google Patents

Générateur de vapeur Download PDF

Info

Publication number
WO2008075308A2
WO2008075308A2 PCT/IB2007/055249 IB2007055249W WO2008075308A2 WO 2008075308 A2 WO2008075308 A2 WO 2008075308A2 IB 2007055249 W IB2007055249 W IB 2007055249W WO 2008075308 A2 WO2008075308 A2 WO 2008075308A2
Authority
WO
WIPO (PCT)
Prior art keywords
steam generator
steam
filter
water
housing
Prior art date
Application number
PCT/IB2007/055249
Other languages
English (en)
Other versions
WO2008075308A3 (fr
Inventor
Ajit Pal Singh
Asok Kumar Kasevan
Yong Jiang
Gerardus Johannes Maria Majoor
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2008075308A2 publication Critical patent/WO2008075308A2/fr
Publication of WO2008075308A3 publication Critical patent/WO2008075308A3/fr

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

  • This invention relates to a steam generator, more particularly to a steam generator used for steaming systems, steam irons and ironing systems.
  • Steam is produced in a steam generator and is delivered to a downstream system through a hose.
  • the hose is connected to a steam outlet of the steam generator through a valve.
  • the steam generator is typically filled with tap water which normally contains various gases as well as salts. Salts which are customarily found in tap water include sodium bicarbonate, sodium sulfate and magnesium bicarbonate. The percentage of sodium and magnesium salts determines the hardness of water.
  • the heating of water entails decomposition of water into its constituents, and such constituents, especially carbonates, deposit on the adjacent surfaces in the form of scale. Scale is an insulator of heat and hence the energy requirements of the steam generator increase as the thickness of the scale increases.
  • a filter is placed in the valve to prevent the solid impurities such as scale particles passing to the downstream system from the steam generator.
  • the solid impurities tend to build up around the filter and clog it. This clogging increases the pressure drop across the valve and reduces the steam rate. This can lead to failure of the valve in case the filter is completely blocked. Furthermore, it is not possible to clean the filter since the valve is not opened during the service life of the steam generator.
  • EP 658647 discloses a steam generator for flat irons comprising a water reservoir having in its upper part a steam outlet aperture intended to be connected to the flat iron and an aperture for filling the reservoir with water.
  • the generator comprises, above the aperture of the outlet, a filter intended to hold back the particles of tartar formed during heating of the water and capable of being carried along by the steam towards the aperture of the steam outlet.
  • the filter is placed in the filling opening of the water reservoir, under the stopper which closes this opening.
  • this system is not configured to minimize scale formation. Further, in such systems the filter may be removed each time the steam generator is refilled. Moreover, the steam generator cannot be refilled while in operation, as the steam generator then is at a pressure above atmospheric pressure.
  • a steam generator comprises a steam generator housing. At least one removable filter is disposed in the steam generator housing for filtering solid particles from steam.
  • the steam generator is provided with a compartment for accommodating a water treatment feature, the compartment being coupled to the filter.
  • Steam generators are typically filled with tap water. Minerals present in potable natural and city water cause scale formation in the steam generator. Scale formation reduces heat transfer, thereby substantially reducing the capacity of the steam generator to generate steam and vastly increasing the energy required to operate the steam generator because of such poor heat transfer.
  • the water treatment feature provided in the compartment minimizes scale formation, thereby improving the efficiency of the steam generator.
  • the water treatment feature either reacts to the alkalinity of the water in the steam generator, neutralizes the hardness of the water or it modifies the surface tension of the water, removes foam and prevents the carry-over of fine water particles into the steam.
  • the quality of the steam is further ensured by allowing the steam to pass through the removable filter. Solid impurities, if any, present in the steam are retained by the filter. This further prevents the scale particles from being carried away along with the steam. Since the filter is removable, it can be inspected for blockage by solid impurities occasionally. Also, as the compartment for accommodating the water feature is coupled to the filter, it can be removed along with the filter for inspecting the condition of the water conditioner. According to another embodiment of the invention, the compartment is fixedly coupled to the filter.
  • the compartment is placed below the filter.
  • the position of the compartment ensures that the water treatment feature always is in contact with the water in the steam generator even when the water level is at its lowest.
  • the compartment is coupled to the filter via a flexible filament or a flexible rod.
  • the flexible filament or the flexible rod allows the position of the compartment to be variable within the steam generator.
  • the flexible filament or the flexible rod allows the compartment to float on the water, which ensures good contact between the water treatment feature and the water in the steam generator.
  • the flexible filament or the flexible rod is made of any polymeric material which is capable of withstanding high temperatures.
  • the water treatment feature includes a water conditioner in the form of a pill or a gel.
  • the hardness of the water used in the steam generator has a great influence upon the useful life.
  • the tap water is softened so that the deposition of scale during operation of the steam generator is substantially reduced.
  • the water conditioner also modifies the surface tension of the water and prevents the carry-over of fine water particles into the steam. The reaction between the water conditioner and the water in the steam generator takes place when the pill melts or as a result of a capillary action.
  • the water treatment feature comprises a soft sponge impregnated with a water conditioner.
  • the porous nature of the sponge ensures good contact between the water conditioner and the water in the steam generator.
  • the water conditioner is an anti-scaling agent or an anti- foaming agent.
  • the anti-scaling agent reacts with the alkalinity of the water in the steam generator and neutralizes the hardness of water.
  • the anti- foaming agent is a mixture of surface-active agents for modifying the surface tension of water, removing foam and preventing the carry-over of fine water particles into the steam.
  • anti-scaling or anti- foaming are intended to embrace all types of substances which are used to soften water by removing scale-forming calcium and/or magnesium ions from hard water or replacing them by the more soluble ions, such as sodium ions, and which are used to modify the surface tension of water.
  • the steam generator housing comprises a rinsing opening which is closeable by a removable cap.
  • a user of the steam generator is expected to perform a self-clean action in order to remove the deposited scale from the walls of the steam generator.
  • a rinse indicator may be provided either on the steam generator housing or on a downstream system, which indicator utilizes the steam generated by the steam generator to warn the user that the amount of scale has reached a certain limit and that the steam generator has to be cleaned. The length of intervals between successive rinsings depends upon the quality of the water used to generate steam, the number of hours the steam generator is in operation and so on. The user rinses the steam generator and pours out the water through the rinsing opening by removing the cap.
  • the removable cap is coupled to the filter and the compartment.
  • the filter and the compartment are removed for inspecting their condition by removing the cap.
  • the filter is placed in the valve to prevent that the scale particles are passed to a downstream system from the steam generator. This further prevents the scale particles from tanning the garment if the downstream system is a soleplate of an iron.
  • the solid impurities tend to build up around the filter and clog it. This clogging increases the pressure drop across the valve and reduces the steam rate. This can lead to failure of the valve in case the filter is completely blocked.
  • tap water is heated to temperatures above 68 0 C, scale formation is inevitable. In the long run the thickness of the scale causes overheating and reduces the efficiency of the steam generator.
  • the user can inspect the filter and can clean or replace the filter depending on the condition of the filter. Furthermore, it is not possible to provide the steam generator with a quantity of water conditioner which is sufficient to soften the water used during the entire life of the steam generator.
  • the water conditioner must be replaced by a fresh water conditioner after it has been used for a number of hours.
  • the removable cap enables replacement of the water conditioner during the rinse cycle.
  • the filter is disposed in a filter housing having a steam inlet and a steam outlet, and the steam inlet and the rinsing opening are situated on opposite end portions of the filter housing and the steam outlet is situated between the steam inlet and the rinsing opening and is oriented in a transverse direction relative to the steam inlet and the rinsing opening.
  • the steam generator housing has only one opening to accommodate the rinsing opening to which the filter and the compartment are coupled.
  • the filter is disposed in a filter housing having steam inlets and a steam outlet, and the rinsing opening and the steam outlet are situated on opposite end portions of the filter housing.
  • the steam enters the filter housing through the pores comprised in the filter housing.
  • the pores act as steam inlets. Since the steam outlet and the rinsing opening are situated on opposite end portions of the filter housing, rinsing out water does not interfere with the output of steam. In this manner, accidental blockage of the steam outlet with solid particles during the rinse cycle is precluded.
  • the rinsing opening is situated in a bottom portion of the steam generator housing and the steam outlet opening is situated in a top portion of the steam generator housing. It is easy to drain the water if the rinsing opening is at the bottom of the steam generator housing. Rinse water can flow out under the action of gravity once the cap is removed. Similarly, it is convenient to have the steam outlet in the top, as the steam rises vertically and exits through the steam outlet.
  • a steaming system comprises the steam generator described above.
  • the steaming system uses the steam generated by the steam generator for various applications.
  • the configuration of the steam generator as described above ensures the quality of the steam generated.
  • an iron comprises the steam generator described above.
  • the configuration of the steam generator described above prevents the tanning of a garment to be ironed.
  • Figure 1 shows a steam generator according to one embodiment of the invention
  • Figure 2 shows a steam generator according to another embodiment of the invention
  • a steam generator 1 is fitted with an electrical heater 2.
  • the steam generator 1 includes a steam generator housing 15.
  • the steam generator housing 15 comprises a rinsing opening 8 for rinsing out water.
  • the rinsing opening 8 is closeable by a removable cap 9.
  • the removable cap 9 comprises a threaded nozzle which is screwed into the opening 8.
  • a filter housing 20 comprises a steam inlet 6 and a stem outlet 10.
  • a filter 7 is disposed in the filter housing 20.
  • a valve 11 is coupled to the filter housing 20 via the steam outlet 10.
  • the steam outlet 10 is connected to a downstream system (not shown) via a rubber hose 12. Water is fed to the steam generator 1 through a water inlet 13. Another rubber hose 14 connects the water inlet 13 to a water supply (not shown).
  • a compartment 4 for accommodating a water conditioner 3 is coupled to the filter 7.
  • the compartment 4 is coupled to the filter 7 by means of a flexible filament or a flexible rod 5.
  • the steam generator 1 is filled with water through the water inlet 13. When the steam generator 1 is provided with a dedicated water inlet 13, it can be refilled even during operation.
  • Such a steam generator is known as an unlimited steam generator.
  • the water used in the steam generator is typically tap water. Since tap water contains inorganic substances such as calcium and sodium, they remain within the steam generator 1 as scale particles after the water is converted to steam. By means of the water conditioner 3, the tap water is softened so that the deposition of scale during operation of the steam generator 1 is substantially reduced.
  • the compartment 4 coupled to the filter 7 accommodates the water conditioner 3.
  • the compartment 4 is coupled to the filter 7 by means of the flexible filament or the flexible rod 5.
  • the flexible filament or the flexible rod 5 is either screwed or plugged into the removable cap 9.
  • the flexible filament or the flexible rod 5 allows the the position of the compartment 4 to be variable within the steam generator 1. In other words, it allows the compartment 4 to float on the water in the steam generator 1.
  • the flexible filament or the flexible rod 5 is made of any polymeric material which is capable of withstanding high temperatures.
  • the compartment 4 has a perforated surface, which allows the water to come into contact with the water conditioner 3.
  • the water conditioner is in the form of a pill or a gel. A soft sponge impregnated with a water conditioner can also be placed in the compartment 4.
  • the water conditioner 3 can be an anti-scaling agent or an anti- foaming agent or a combination of both.
  • Anti-scaling agents react with the alkalinity of the water in the steam generator 1 and neutralize the hardness of the water.
  • Anti- foaming agents are a mixture of surface active agents that modify the surface tension of water, remove foam and prevent the carry-over of fine water particles into the steam.
  • the water is heated by means of the electrical heater 2.
  • the steam thus generated passes through the filter 7 and exits the steam outlet 10.
  • the flow of steam through the steam outlet 10 is controlled by the valve 11 which is an electromechanical actuating valve.
  • the filter 7 is meant to hold back the scale particles formed during heating of the water. It ensures that clean steam is passed to the downstream system.
  • the filter 7 is made of a thin- walled mesh which is a lattice work or a perforated sheet, made preferably of stainless steel or plastic material.
  • the filter 7 is attached to the removable cap 9 either by screwing or as a tight plug-in.
  • the steam generator 1 It is not possible to provide the steam generator 1 with a quantity of conditioner 3 which is sufficient to soften the water used during the entire life of the steam generator.
  • the water conditioner 3 must be replaced by a fresh water conditioner after it has been used for a number of hours.
  • the removable cap 9 enables replacement of the water conditioner 3 during the rinse cycle.
  • the scale particles tend to build up around the filter 7and clog it. This clogging increases the pressure drop across the valve 11 and reduces the steam rate. This can lead to failure of the valve 11 in case the filter 7 is completely blocked.
  • a user is expected to perform a self-clean action in order to remove the deposited scale from the walls of the steam generator 1.
  • a rinse indicator may be provided either on the steam generator 1 or on the downstream system to warn the user that the amount of scale has reached a certain limit and that the steam generator 1 has to be cleaned.
  • the length of the intervals between successive rinsings depends upon the quality of the water used to generate steam, the number of hours the steam generator 1 is in operation and so on.
  • the user rinses the steam generator 1 and pours out the water through the opening 8 and fills the steam generator 1 with fresh water.
  • the user can also check the filter 7 and can clean or replace the filter depending on the condition of the filter. Since the filter is situated in the outlet for rinsing, the filter is checked occasionally i.e., only during the rinse cycle. Similarly, during the same rinse cycle, the user can also replace the water conditioner 3.
  • the steam generator shown in Figure 2 is similar to that shown in Figure 1 but has a different configuration.
  • the steam generator 1 is fitted with an electrical heater 2.
  • the steam generator 1 includes a steam generator housing 15.
  • the steam generator housing 15 comprises a rinsing opening 8 for rinsing out water.
  • the rinsing opening 8 is closeable by a removable cap 9.
  • the removable cap 9 comprises a threaded nozzle which is screwed into the opening 8.
  • a filter housing 20 comprises steam inlets denoted by the numeral 6 and a steam outlet 10.
  • a filter 7 is disposed in the filter housing 20.
  • a valve 11 is coupled to the filter housing 20 via the steam outlet 10.
  • the steam outlet 10 is connected to a downstream system (not shown) via a rubber hose 12. Water is fed to the steam generator 1 through a water inlet 13. Another rubber hose 14 connects the water inlet 13 to a water supply (not shown). A compartment 4 for accommodating a water conditioner 3 is fixedly coupled to the filter 7.
  • the filter housing 20 is arranged vertically in such a manner that one end of the filter housing 20 comes into contact with the bottom of the steam generator housing 15 and the other end comes into contact with the top of the steam generator housing 15.
  • the removable cap 9 is placed at the bottom of the steam generator housing 15, whereas the valve 11 is placed on top of the steam generator housing 15.
  • the removable cap 9 and the valve 11 communicate with the steam generator 1 through the filter housing 20, which is in the form of a nozzle.
  • the filter housing 20 is either welded or embossed onto the steam generator 1. It has a perforated surface which allows steam to pass through the perforations. These perforations act as steam inlets 6. The steam then passes through the filter to the steam outlet 10.
  • the compartment 4 is placed below the filter 7 and anchored to the removable cap 9.
  • the water conditioner 3 in the compartment 4 is placed in such a way that it always comes into contact with the water in the steam generator 1 even when the water level is at its lowest.
  • the filter 7 is anchored firmly to the removable cap 9.
  • the filter housing 20 is locked into the steam outlet 10, which protrudes into the steam generator 1.
  • the filter 7 will be partially covered by water, allowing the generated steam to escape through the filter on the uncovered side towards the steam outlet 10.
  • the steam then will be directed to the rubber hose 12 and to the downstream system via the valve 11.
  • the filter 7 and the compartment 4 are detachable It is to be understood that although preferred embodiments, specific constructions and configurations, as well as materials, have been discussed herein for devices according to the present invention, various changes or modifications in form and detail may be made without departing from the scope and spirit of this invention.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Irons (AREA)
  • Devices For Medical Bathing And Washing (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

Le générateur de vapeur selon l'invention comprend un logement de générateur de vapeur. Au moins un filtre amovible est disposé dans le logement de générateur de vapeur pour filtrer les particules solides de la vapeur. Le générateur de vapeur comprend en outre un compartiment conçu pour loger une caractéristique de traitement d'eau. Le compartiment est couplé au filtre amovible. Le filtre peut être retiré avec le compartiment en vue d'une inspection.
PCT/IB2007/055249 2006-12-21 2007-12-20 Générateur de vapeur WO2008075308A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06126883.5 2006-12-21
EP06126883 2006-12-21

Publications (2)

Publication Number Publication Date
WO2008075308A2 true WO2008075308A2 (fr) 2008-06-26
WO2008075308A3 WO2008075308A3 (fr) 2008-08-14

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ID=39433806

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/055249 WO2008075308A2 (fr) 2006-12-21 2007-12-20 Générateur de vapeur

Country Status (1)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102995374A (zh) * 2011-09-09 2013-03-27 Seb公司 包括蒸汽分配回路的家电设备
WO2013068870A1 (fr) * 2011-11-08 2013-05-16 Koninklijke Philips Electronics N.V. Fer à repasser à générateur de vapeur
US8615908B2 (en) 2009-02-05 2013-12-31 Strix Limited Hand-held steam appliances
WO2015033247A1 (fr) 2013-09-06 2015-03-12 Koninklijke Philips N.V. Cuiseur à vapeur ayant une unité de filtre, cartouche de filtre et procédé de transfert de vapeur
EP2942430A1 (fr) * 2014-05-06 2015-11-11 Seb S.A. Procede de fonctionnement d'un appareil de repassage comportant une cuve pour la generation de vapeur sous pression
EP2942431A1 (fr) * 2014-05-06 2015-11-11 Seb S.A. Procédé de fonctionnement d'un appareil de repassage comportant une cuve pour la génération de vapeur sous pression
JP2017528672A (ja) * 2014-08-26 2017-09-28 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． スチーム装置用のスチーム発生器
ITUA20162831A1 (it) * 2016-04-22 2017-10-22 De Longhi Appliances Srl Caldaia
ITUA20162830A1 (it) * 2016-04-22 2017-10-22 De Longhi Appliances Srl Caldaia
WO2017182660A1 (fr) * 2016-04-22 2017-10-26 De' Longhi Appliances S.R.L. Con Unico Socio Chaudière

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2608013A1 (de) * 1976-02-09 1977-08-11 Schoenmann & Co Ag E Steuereinrichtung fuer eine mit dampf betriebene anlage
GB2309071A (en) * 1996-01-10 1997-07-16 Ngai Shing Dev Limited Steam generator
US6212332B1 (en) * 1998-12-15 2001-04-03 John C. K. Sham Steam iron station

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2608013A1 (de) * 1976-02-09 1977-08-11 Schoenmann & Co Ag E Steuereinrichtung fuer eine mit dampf betriebene anlage
GB2309071A (en) * 1996-01-10 1997-07-16 Ngai Shing Dev Limited Steam generator
US6212332B1 (en) * 1998-12-15 2001-04-03 John C. K. Sham Steam iron station

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8615908B2 (en) 2009-02-05 2013-12-31 Strix Limited Hand-held steam appliances
CN102995374A (zh) * 2011-09-09 2013-03-27 Seb公司 包括蒸汽分配回路的家电设备
EP2578743B1 (fr) * 2011-09-09 2017-11-29 Seb S.A. Appareil électroménager comportant un circuit de distribution de vapeur
US9365969B2 (en) 2011-11-08 2016-06-14 Koninklijke Philips N.V. Steam generator iron
WO2013068870A1 (fr) * 2011-11-08 2013-05-16 Koninklijke Philips Electronics N.V. Fer à repasser à générateur de vapeur
WO2015033247A1 (fr) 2013-09-06 2015-03-12 Koninklijke Philips N.V. Cuiseur à vapeur ayant une unité de filtre, cartouche de filtre et procédé de transfert de vapeur
US10132025B2 (en) 2013-09-06 2018-11-20 Koninklijke Philips N.V. Steamer with filter unit, filter cartridge and method of conveying steam
CN105088734B (zh) * 2014-05-06 2018-11-13 Seb公司 包括用于产生压力蒸汽的筒的熨烫设备的工作方法
CN105088734A (zh) * 2014-05-06 2015-11-25 Seb公司 包括用于产生压力蒸汽的筒的熨烫设备的工作方法
CN105088735A (zh) * 2014-05-06 2015-11-25 Seb公司 包括用于产生压力蒸汽的筒的熨烫设备的工作方法
FR3020817A1 (fr) * 2014-05-06 2015-11-13 Seb Sa Procede de fonctionnement d'un appareil de repassage comportant une cuve pour la generation de vapeur sous pression
FR3020818A1 (fr) * 2014-05-06 2015-11-13 Seb Sa Procede de fonctionnement d'un appareil de repassage comportant une cuve pour la generation de vapeur sous pression
EP2942430A1 (fr) * 2014-05-06 2015-11-11 Seb S.A. Procede de fonctionnement d'un appareil de repassage comportant une cuve pour la generation de vapeur sous pression
EP2942431A1 (fr) * 2014-05-06 2015-11-11 Seb S.A. Procédé de fonctionnement d'un appareil de repassage comportant une cuve pour la génération de vapeur sous pression
CN105088735B (zh) * 2014-05-06 2019-04-26 Seb公司 包括用于产生压力蒸汽的筒的熨烫设备的工作方法
JP2017528672A (ja) * 2014-08-26 2017-09-28 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． スチーム装置用のスチーム発生器
ITUA20162831A1 (it) * 2016-04-22 2017-10-22 De Longhi Appliances Srl Caldaia
ITUA20162830A1 (it) * 2016-04-22 2017-10-22 De Longhi Appliances Srl Caldaia
WO2017182660A1 (fr) * 2016-04-22 2017-10-26 De' Longhi Appliances S.R.L. Con Unico Socio Chaudière
RU2752395C2 (ru) * 2016-04-22 2021-07-27 Дэ' Лонги Апллиансес С.Р.Л. Кон Унико Сосио Паровой котел

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