EP1479970A1 - Chaudière pour la production de vapeur dans des appareils électroménagers et appareils professionelles, comme dispositifs de repassage ou nettoyage ou similaire - Google Patents

Chaudière pour la production de vapeur dans des appareils électroménagers et appareils professionelles, comme dispositifs de repassage ou nettoyage ou similaire Download PDF

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Publication number
EP1479970A1
EP1479970A1 EP03011605A EP03011605A EP1479970A1 EP 1479970 A1 EP1479970 A1 EP 1479970A1 EP 03011605 A EP03011605 A EP 03011605A EP 03011605 A EP03011605 A EP 03011605A EP 1479970 A1 EP1479970 A1 EP 1479970A1
Authority
EP
European Patent Office
Prior art keywords
boiler
water
container
pipe
water circuit
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Withdrawn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
EP03011605A
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German (de)
English (en)
Inventor
Flavio Passuello
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.)
Commital-Sami SpA
Original Assignee
Commital-Sami SpA
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 Commital-Sami SpA filed Critical Commital-Sami SpA
Priority to EP03011605A priority Critical patent/EP1479970A1/fr
Publication of EP1479970A1 publication Critical patent/EP1479970A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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 concerns a boiler to generate steam in domestic appliances and professional machines, such as for example ironing or cleaning apparatuses or suchlike, comprising a container inside which water is able to be introduced by means of a feed pump.
  • An outer water circuit communicates with the container, so that, according to the principle of communicating vessels, the same water level is established therein as in the container.
  • a level sensor of the capacitive type is connected to the water circuit in order to detect the presence of the water in correspondence with a pre-determined threshold level.
  • the sensor is connected to the feed pump so as to regulate, according to the level, the flow of water inside the container.
  • a boiler that generates steam in domestic appliances, comprising a metal container into which water is automatically fed by means of a pump that pumps water from an outer tank, not under pressure.
  • the level in the boiler is managed by means of a metal sensor arranged vertically inside the boiler and electrically insulated both from the boiler and from the earth circuit connected thereto.
  • the electric circuit When the water level inside the boiler touches the metal sensor, the electric circuit is closed with respect to the earth circuit.
  • the electronic module that manages the level thus stops the feed pump of the boiler.
  • a first disadvantage of the known boiler is that, when it is not immersed in the water, the metal sensor is affected by the conductivity of the steam which is in the metal container, so much so that the detection of the water level can be quite imprecise and the electric circuit can close even when the water has not reached the pre-determined level.
  • Another disadvantage of the known boiler is that the metal sensor is housed in a through hole made in the wall of the metal container. Sealing washers and insulating elements must therefore necessarily be interposed between the metal sensor and the wall of the container in order to prevent dispersions of electricity and losses of water.
  • the known boiler therefore requires a plurality of working steps, both to make the hole where the metal sensor is housed, and also for the relative positioning, insulation and attachment. For example, it is necessary to make at least a hollow pipe, surrounding the metal sensor, in which the water of the boiler is conveyed to prevent a false measurement of the level being made, in the case of possible oscillations of the water inside the tank.
  • Applicant has devised and embodied the present invention in order to overcome these shortcomings of the state of the art and to obtain other advantages.
  • One purpose of the invention is to achieve a boiler to generate steam by means of which it is possible to detect, sensitively, accurately, simply and immediately, the water level in correspondence with a determinate threshold.
  • Another purpose of the present invention is to achieve a boiler provided with a level sensor that can easily be installed in the boiler and removed from the boiler itself.
  • a boiler to generate steam in domestic appliances and professional machines comprises a container able to contain water and connected to feed means able to introduce water inside the container, and at least a heat generator to heat the water inside the container and transform it into steam.
  • a water circuit is arranged outside the container and communicates therewith, so that the same water level as is present in the container is established in the outer water circuit.
  • Sensor means are associated with the water circuit in correspondence with a pre-determined threshold level and are connected at least to the feed means.
  • the sensor means are of the capacitive type and are able to detect at least the presence of the water, in correspondence with said pre-determined level, in order to command the afore-said feed means.
  • the capacitive-type sensor means comprise a condenser consisting of an element conducting electric current, such as a ring, a bar or otherwise, which forms the first plate, and is directly associated with an outer wall of the water circuit.
  • the water itself constitutes the second plate of the condenser.
  • the water circuit comprises, for example, a tubular pipe which starts from the container and is made of insulating material, such as a fluorinated or Teflon resin or similar.
  • the insulating pipe constitutes the dielectric means, interposed between the plates of the condenser.
  • the water circuit comprises a tubular pipe that starts from the container, while the element conducting electric current consists of a metal ring which surrounds, with contact, the tubular pipe.
  • the electrically conductive ring is able to be associated, advantageously from the outside, with the water circuit, without needing to make holes or apertures in the tubular pipe.
  • the conductor ring is electrically connected to an electronic control unit associated with a measuring unit to measure the electric capacity.
  • the electronic control unit is connected to other functional elements of the boiler, such as the valve to regulate the outlet of steam and the valve to regulate the introduction of cold water inside the container. When the water level has reached the pre-determined reference level, the electronic control unit blocks the introduction of cold water inside the container.
  • the electronic control unit is programmed so as to calculate the water level automatically according to the value of the capacity measured by the measuring unit.
  • fig. 1 is a section view of the boiler according to the present invention.
  • a boiler 10 according to the present invention comprises a hermetically sealed steel container 12, and an electric resistance 14 to heat the water, arranged inside the container 12 and connected to a feeder 15 by means of an electronic control unit 22.
  • a water circuit 16 is arranged outside the container 12 and communicates therewith.
  • the water circuit 16 comprises a tubular pipe 19, made of insulating material, such as for example a fluorinated resin, and arranged vertical and parallel to a lateral wall 17 of the container 12. Inside the water circuit 16, due to the principle of communicating vessels, the same water level as is present inside the container 12 is established.
  • a capacitive sensor 18 is arranged, which comprises a conductor ring 20, which constitutes the first plate of the condenser and is electrically connected to the electronic control unit 22.
  • the water contained inside the tubular pipe 19 constitutes the second plate of the condenser, while the tubular pipe 19 constitutes the dielectric means interposed between the two plates of the capacitive sensor 18.
  • the electronic control unit 22 comprises at least a measuring unit 24, of a known type, to measure the capacity, and is electrically connected to the bottom wall 25 of the container 12, and then to an earth circuit, of a known type and not shown in the drawing.
  • the electric capacity of the capacitive sensor 18 varies according to the water level, since it is inversely proportionate to the distance between the plates.
  • the capacity measured by the measuring unit 24 considerably increases, because the distance between the conductor ring 20 and the water level L considerably decreases.
  • the boiler 10 also comprises other components of a known type, such as a pressure switch 28 to control the pressure inside the container 12, a valve 30 by means of which the flow of steam is controlled through a first pipe 32 towards the outside of the boiler 10, and a second pipe 34 connected in a lower zone of the tubular pipe 19.
  • a pressure switch 28 to control the pressure inside the container 12
  • a valve 30 by means of which the flow of steam is controlled through a first pipe 32 towards the outside of the boiler 10
  • a second pipe 34 connected in a lower zone of the tubular pipe 19.
  • the second pipe 34 is connected directly to the container 12.
  • the container 12 is connected to a tank 36, not under pressure, where cold water is contained.
  • a pump 38 the cold water is taken from the tank 36, in a flow regulated by means of a one-way valve 40.
  • the electronic control unit 22 is electrically connected to the steam outlet valve 30, the pressure switch 28, the electric resistance 14 and the pump 38.
  • the electronic control unit 22 causes the pump 38 to stop and the one-way valve 40 to close.
  • One advantage of the capacitive sensor 18 according to the present invention is that, in the water circuit 16, the capacitive-type measurement is not influenced by the steam present in the water circuit 16 and hence the detection of the water level L, in proximity with the threshold S, is highly reliable and precise, since it is not influenced by any non-measurable variable such as for example the conductivity of the steam.
  • Another advantage of the boiler 10 according to the invention is that, in the zone where the capacitive sensor 18 is arranged, no calcium deposits are formed due to the heating of the water, because the cold water is introduced directly into the water circuit 16 by means of the pipe 34. Moreover, the cold water, as it rises and descends continuously inside the circuit 16, continuously washes and cleans the inner walls of the tubular pipe 19, thus preventing the formation of calcium or other unwanted deposits.

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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)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
EP03011605A 2003-05-22 2003-05-22 Chaudière pour la production de vapeur dans des appareils électroménagers et appareils professionelles, comme dispositifs de repassage ou nettoyage ou similaire Withdrawn EP1479970A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03011605A EP1479970A1 (fr) 2003-05-22 2003-05-22 Chaudière pour la production de vapeur dans des appareils électroménagers et appareils professionelles, comme dispositifs de repassage ou nettoyage ou similaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03011605A EP1479970A1 (fr) 2003-05-22 2003-05-22 Chaudière pour la production de vapeur dans des appareils électroménagers et appareils professionelles, comme dispositifs de repassage ou nettoyage ou similaire

Publications (1)

Publication Number Publication Date
EP1479970A1 true EP1479970A1 (fr) 2004-11-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03011605A Withdrawn EP1479970A1 (fr) 2003-05-22 2003-05-22 Chaudière pour la production de vapeur dans des appareils électroménagers et appareils professionelles, comme dispositifs de repassage ou nettoyage ou similaire

Country Status (1)

Country Link
EP (1) EP1479970A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1795109A2 (fr) * 2005-12-09 2007-06-13 LG Electronics Inc. Générateur de vapeur pour un aspirateur, procédé pour commander un tel générateur, aspirateur comportant un tel générateur de vapeur et procédé de commande d'un tel aspirateur
WO2014171908A2 (fr) * 2013-04-10 2014-10-23 Yapicioğlu Umut Dispositif de transfert de chaleur pour chauffer un liquide quelconque et l'air
EP2369227A3 (fr) * 2009-12-22 2018-01-24 BSH Hausgeräte GmbH Unité de production de vapeur pour un appareil ménager et procédé de production de vapeur d'eau
RU2778663C2 (ru) * 2018-04-16 2022-08-22 Но Ыль КИМ Система электродного котла

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1341342A (fr) * 1962-12-19 1963-10-25 Vauxhall Boiler Company Ltd Perfectionnement aux indicateurs de niveau pour liquides
US4662390A (en) * 1985-01-24 1987-05-05 T. W. Ward Industrial Plant Limited Water level controller for a boiler
US5189726A (en) * 1990-09-28 1993-02-23 Cts Costruzioni Techniche Sanmarinesi Steam producing apparatus for home use with low cold water reservoir level steam output stoppage
EP0887588A2 (fr) * 1997-06-05 1998-12-30 Hot - Line S.r.l. Dispositif d'approvisionnement automatique d'un générateur de vapeur pour appareils électriques utilisant de la vapeur
DE10021563A1 (de) * 2000-05-03 2001-11-08 Tyloe Ab Halmstad Regelungsvorrichtung für Dampfgeneratoren

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1341342A (fr) * 1962-12-19 1963-10-25 Vauxhall Boiler Company Ltd Perfectionnement aux indicateurs de niveau pour liquides
US4662390A (en) * 1985-01-24 1987-05-05 T. W. Ward Industrial Plant Limited Water level controller for a boiler
US5189726A (en) * 1990-09-28 1993-02-23 Cts Costruzioni Techniche Sanmarinesi Steam producing apparatus for home use with low cold water reservoir level steam output stoppage
EP0887588A2 (fr) * 1997-06-05 1998-12-30 Hot - Line S.r.l. Dispositif d'approvisionnement automatique d'un générateur de vapeur pour appareils électriques utilisant de la vapeur
DE10021563A1 (de) * 2000-05-03 2001-11-08 Tyloe Ab Halmstad Regelungsvorrichtung für Dampfgeneratoren

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1795109A2 (fr) * 2005-12-09 2007-06-13 LG Electronics Inc. Générateur de vapeur pour un aspirateur, procédé pour commander un tel générateur, aspirateur comportant un tel générateur de vapeur et procédé de commande d'un tel aspirateur
EP1795109A3 (fr) * 2005-12-09 2008-04-02 LG Electronics Inc. Générateur de vapeur pour un aspirateur, procédé pour commander un tel générateur, aspirateur comportant un tel générateur de vapeur et procédé de commande d'un tel aspirateur
US7917991B2 (en) 2005-12-09 2011-04-05 Lg Electronics Inc. Steam generator, method of controlling the same, cleaner using the same and method of controlling the cleaner
US8601638B2 (en) 2005-12-09 2013-12-10 Lg Electronics Inc. Steam generator, method of controlling the same, cleaner using the same and method of controlling the cleaner
EP2369227A3 (fr) * 2009-12-22 2018-01-24 BSH Hausgeräte GmbH Unité de production de vapeur pour un appareil ménager et procédé de production de vapeur d'eau
WO2014171908A2 (fr) * 2013-04-10 2014-10-23 Yapicioğlu Umut Dispositif de transfert de chaleur pour chauffer un liquide quelconque et l'air
WO2014171908A3 (fr) * 2013-04-10 2015-01-22 Yapicioğlu Umut Dispositif de transfert de chaleur pour chauffer un liquide quelconque et l'air
RU2778663C2 (ru) * 2018-04-16 2022-08-22 Но Ыль КИМ Система электродного котла

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