EP0352499A2 - A heating device for washing and/or drying machines for laundry - Google Patents
A heating device for washing and/or drying machines for laundry Download PDFInfo
- Publication number
- EP0352499A2 EP0352499A2 EP89111969A EP89111969A EP0352499A2 EP 0352499 A2 EP0352499 A2 EP 0352499A2 EP 89111969 A EP89111969 A EP 89111969A EP 89111969 A EP89111969 A EP 89111969A EP 0352499 A2 EP0352499 A2 EP 0352499A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- washing
- laundry
- heating device
- machine
- 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.)
- Ceased
Links
Images
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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/04—Heating arrangements
-
- 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
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/26—Heating arrangements, e.g. gas heating equipment
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
- H05B3/262—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an insulated metal plate
Definitions
- the present invention relates to a heating device of a simple type to be used in washing and/or drying machines for laundry to provide for efficient heating of the washing liquid or the drying air for the laundry in the machine.
- conventional washing and/or drying machines for laundry are provided with one or more elements for heating the washing solution or the drying air for the laundry, which are generally realized in the form of electrical resistors of the metal-clad type.
- Such electrical resistors are in particular provided with one or more tubular branches of compact dimensions which are fixed to a flange and project therefrom at a short length to allow for connection of the corresponding electric supply lines.
- the resistors thus constituted are furthermore mounted in the machine in question through corresponding openings and through the intermediary of sealing gaskets.
- the object of the present invention is therefore to overcome the above-described disadvantages and limits by a heating device for washing and/or drying machines for laundry that is designed so as to provide for efficient and quick heating of the washing liquid or drying air of the machine, and also has elevated heating powers and compact dimensions.
- a heating device for washing and/or drying machines for laundry, charac terized in that it comprises at least one plate made of electrically insulating material, preferably of a curved parallelepiped shape, and heating means consisting of electrically conductive material applied to at least one surface of the plate according to a predetermined pattern, said plate being applicable in removable fashion within the vessel of the machine and being designed so to allow for connection to the power supply network of the terminals of the heating means.
- the present heating device comprises substantially a plate 4 of parallelepiped shape and curved with a bending radius so as to fit inside the vessel (not shown) of a washing machine or drying machine of the conventional type.
- the plate is furthermore preferably realized in steel or another suitable metal material, adequately enameled so as to be electrically insulating, and can also be realized in electrically insulating material of a different type such as ceramic, glass-ceramic or the like.
- the heating device in question also comprising strictlyes heating means 5 consisting of electrically conductive material applied to at least one outer surface of plate 4 so as to form a continuous electrical resistor adapted to effect the heating of the washing liquid or drying air, respectively, in the case of a washing machine or drying machine or combined machine for washing and drying laundry.
- the electrical resistor is in particular obtained using preferably a conductive mass consisting of electrically conductive metal powders, such as powdered boron, cuprous oxide, cupric oxide, cobalt or nickel oxide, and of glass frit mixed together with variable percentages of the single components in accordance with the desired resistivity, and subsequently subjected to heat treatments in the conventional way.
- electrically conductive metal powders such as powdered boron, cuprous oxide, cupric oxide, cobalt or nickel oxide, and of glass frit mixed together with variable percentages of the single components in accordance with the desired resistivity, and subsequently subjected to heat treatments in the conventional way.
- This conductive mass is applied to the surface of plate 4 preferably by the silk screen process or in any other way known per se, thereby realizing one or more conductive tracks with a predetermined pattern.
- the resistive track is realized in a wavy shape and extends practically over the entire surface of plate 4, and terminals 6 and 7 of the track are situated in correspondence with parallelepiped pro jections 8 and 9 extending from lateral edge 10 of the plate, the terminals furthermore being equipped with corresponding plug clamps 11 and 12 or similar confections to allow for connection of the terminals with electric supply lines 13 and 14 of the machine.
- Electrical resistor 5 may also be realized in a different way, for example it may consist of conductive metal material applied to the surface of plate 4 by different manufacturing technology, for example by the "thick film” technique, without thereby going beyond the scope of the invention.
- Fig. 2 shows the present heating device used within washing vessel 15 of a washing machine to heat the washing liquid for the laundry which is introduced into the vessel
- plate 4 designed as described above is mounted in correspondence with bottom wall 16 of the vessel, and expediently spaced therefrom.
- the mounting of plate 4 is in particular performed by inserting projections 8 and 9 of the plate through corresponding openings 17, in the vessel, through the intermediary of gaskets 19 for hermetic sealing, and by suitable fixing means known per se and adapted to lock the plate in position in such a way that the projections extend partially outside the vessel to allow for connection of electric supply lines 13 and 14 of the machine with corresponding plug clamps 11 and 12 of the projections and thus with electrical resistor 5.
- Fig. 3 shows the present heating device used inside vessel 15 of a combined washing and drying machine for laundry to heat the drying air for the laundry which is produced by a fan 21 connected to the upper part of the vessel.
- plate 4 is mounted against the upper wall of vessel 15 expediently spaced therefrom and from drum 22 of the machine, and this mounting is performed in the same ways as described above.
- plate 4 and resistor 5 can also be realized in forms other than those described without thereby going beyond the scope of the invention.
- the heating device designed in this way thus makes it possible to obtain elevated heat radiating powers even with relatively low electrical powers, and with compact dimensions of the plate, thereby permitting a homogeneous distribution of the radiant heat in the washing liquid or the drying air to be heated.
Abstract
Description
- The present invention relates to a heating device of a simple type to be used in washing and/or drying machines for laundry to provide for efficient heating of the washing liquid or the drying air for the laundry in the machine. As is known, conventional washing and/or drying machines for laundry are provided with one or more elements for heating the washing solution or the drying air for the laundry, which are generally realized in the form of electrical resistors of the metal-clad type.
- Such electrical resistors are in particular provided with one or more tubular branches of compact dimensions which are fixed to a flange and project therefrom at a short length to allow for connection of the corresponding electric supply lines.
- The resistors thus constituted are furthermore mounted in the machine in question through corresponding openings and through the intermediary of sealing gaskets.
- The presence of electrical resistors of this type makes it possible to obtain satisfactory heating of the washing solution contained in the vessel of the washing machine, or of the drying air circulating through the drum of the drying machine or of a combined machine for washing and drying laundry, but the application of such resistors is limited due to their constructional shape. Given the relatively limited radiating surface of the heating branches of these resistors, the use thereof does not make it possible to obtain elevated heating powers without overheating the resistors, although this would be desirable in the interests of faster heating of the washing solution or drying air, and thus of shorter durations of the corresponding washing or drying cycles of the machine.
- The object of the present invention is therefore to overcome the above-described disadvantages and limits by a heating device for washing and/or drying machines for laundry that is designed so as to provide for efficient and quick heating of the washing liquid or drying air of the machine, and also has elevated heating powers and compact dimensions.
- This and other objects are obtained according to the invention by a heating device for washing and/or drying machines for laundry, charac terized in that it comprises at least one plate made of electrically insulating material, preferably of a curved parallelepiped shape, and heating means consisting of electrically conductive material applied to at least one surface of the plate according to a predetermined pattern, said plate being applicable in removable fashion within the vessel of the machine and being designed so to allow for connection to the power supply network of the terminals of the heating means.
- The features of the invention will become more evident from the following description, intended solely as a nonrestrictive example, with reference to the adjoined drawings, in which
- Fig. 1 shows a perspective view of the inventive heating device;
- Figs. 2 and 3 show the device of Fig. 1 applied in a washing machine and in a drying machine for laundry, respectively.
- Referring to Fig. 1, one can see that the present heating device comprises substantially a
plate 4 of parallelepiped shape and curved with a bending radius so as to fit inside the vessel (not shown) of a washing machine or drying machine of the conventional type. The plate is furthermore preferably realized in steel or another suitable metal material, adequately enameled so as to be electrically insulating, and can also be realized in electrically insulating material of a different type such as ceramic, glass-ceramic or the like. The heating device in question also comprises heating means 5 consisting of electrically conductive material applied to at least one outer surface ofplate 4 so as to form a continuous electrical resistor adapted to effect the heating of the washing liquid or drying air, respectively, in the case of a washing machine or drying machine or combined machine for washing and drying laundry. - The electrical resistor is in particular obtained using preferably a conductive mass consisting of electrically conductive metal powders, such as powdered boron, cuprous oxide, cupric oxide, cobalt or nickel oxide, and of glass frit mixed together with variable percentages of the single components in accordance with the desired resistivity, and subsequently subjected to heat treatments in the conventional way.
- This conductive mass is applied to the surface of
plate 4 preferably by the silk screen process or in any other way known per se, thereby realizing one or more conductive tracks with a predetermined pattern. In the example considered, the resistive track is realized in a wavy shape and extends practically over the entire surface ofplate 4, andterminals parallelepiped pro jections 8 and 9 extending fromlateral edge 10 of the plate, the terminals furthermore being equipped withcorresponding plug clamps electric supply lines - Electrical resistor 5 may also be realized in a different way, for example it may consist of conductive metal material applied to the surface of
plate 4 by different manufacturing technology, for example by the "thick film" technique, without thereby going beyond the scope of the invention. - Referring now to Fig. 2, which shows the present heating device used within
washing vessel 15 of a washing machine to heat the washing liquid for the laundry which is introduced into the vessel, one can see thatplate 4 designed as described above is mounted in correspondence withbottom wall 16 of the vessel, and expediently spaced therefrom. The mounting ofplate 4 is in particular performed by insertingprojections 8 and 9 of the plate through corresponding openings 17, in the vessel, through the intermediary ofgaskets 19 for hermetic sealing, and by suitable fixing means known per se and adapted to lock the plate in position in such a way that the projections extend partially outside the vessel to allow for connection ofelectric supply lines corresponding plug clamps - Fig. 3 shows the present heating device used inside
vessel 15 of a combined washing and drying machine for laundry to heat the drying air for the laundry which is produced by afan 21 connected to the upper part of the vessel. In this case,plate 4 is mounted against the upper wall ofvessel 15 expediently spaced therefrom and fromdrum 22 of the machine, and this mounting is performed in the same ways as described above. - According to the invention,
plate 4 and resistor 5 can also be realized in forms other than those described without thereby going beyond the scope of the invention. - Thanks to the ample radiating surface of
plate 4, the heating device designed in this way thus makes it possible to obtain elevated heat radiating powers even with relatively low electrical powers, and with compact dimensions of the plate, thereby permitting a homogeneous distribution of the radiant heat in the washing liquid or the drying air to be heated.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8845750A IT1225119B (en) | 1988-07-25 | 1988-07-25 | HEATING DEVICE FOR WASHING MACHINES AND / OR LINEN DRYERS |
IT4575088 | 1988-07-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0352499A2 true EP0352499A2 (en) | 1990-01-31 |
EP0352499A3 EP0352499A3 (en) | 1990-07-18 |
Family
ID=11258048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89111969A Ceased EP0352499A3 (en) | 1988-07-25 | 1989-06-30 | A heating device for washing and/or drying machines for laundry |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0352499A3 (en) |
IT (1) | IT1225119B (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994018807A1 (en) * | 1993-02-15 | 1994-08-18 | Strix Limited | Immersion heaters |
EP0890669A2 (en) * | 1997-07-11 | 1999-01-13 | BSH Bosch und Siemens Hausgeräte GmbH | Washing and/or drying machine with an electric heating element |
DE19749958A1 (en) * | 1997-11-03 | 1999-05-06 | Miele & Cie | Washing machine with cylindrical washing solution container |
WO2002035885A1 (en) * | 2000-10-27 | 2002-05-02 | BSH Bosch und Siemens Hausgeräte GmbH | Electric heating body |
EP1342827A1 (en) * | 2002-03-07 | 2003-09-10 | BSH Bosch und Siemens Hausgeräte GmbH | Electrically heatable household appliance |
WO2004042132A2 (en) * | 2002-11-07 | 2004-05-21 | Irca S.P.A | Conduit with improved electric heating element and clothes drying machine provided with such a conduit |
EP1532919A1 (en) * | 2003-11-24 | 2005-05-25 | Indesit Company s.p.a. | Apparatus and method for heating a working fluid in washing machines |
EP1538255A1 (en) * | 2003-12-02 | 2005-06-08 | DBK David + Baader GmbH | Cover for a laundry dryer and process for its assembly |
EP1674028A2 (en) * | 1991-12-20 | 2006-06-28 | Fisher & Paykel Appliances Ltd. | Dishwasher with a thick film heating plate |
WO2007074115A1 (en) * | 2005-12-29 | 2007-07-05 | Arcelik Anonim Sirketi | A washing machine |
EP1852536A1 (en) * | 2005-02-24 | 2007-11-07 | Sharp Kabushiki Kaisha | Washer-dryer |
US7425688B2 (en) | 2004-05-07 | 2008-09-16 | Dbk David + Baader Gmbh | Heating assembly for a tumble dryer |
EP2060670A1 (en) * | 2007-11-14 | 2009-05-20 | BSH Bosch und Siemens Hausgeräte GmbH | Component for a device that guides liquid and household device for caring for articles of laundry with such a component |
WO2009068238A1 (en) * | 2007-11-30 | 2009-06-04 | E.G.O. Elektro-Gerätebau GmbH | Method for operating a washing machine having a heating unit |
WO2012019854A1 (en) * | 2010-08-11 | 2012-02-16 | Valeo Systemes Thermiques | Heater block for electric heating radiator |
WO2014170210A1 (en) * | 2013-04-19 | 2014-10-23 | BSH Bosch und Siemens Hausgeräte GmbH | Panel heating device for heating water in a washing tub, washing machine and method for producing a panel heating device |
WO2016192332A1 (en) * | 2015-06-02 | 2016-12-08 | 青岛海尔滚筒洗衣机有限公司 | Washing machine with steam washing function, and control method |
EP3573425A1 (en) * | 2018-05-25 | 2019-11-27 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Heating device method of manufacturing a heating device |
US10690391B2 (en) | 2013-03-15 | 2020-06-23 | Whirlpool Corporation | Appliance using heated glass panels |
DE102020103787A1 (en) | 2020-02-13 | 2021-08-19 | Miele & Cie. Kg | dryer |
EP4093151A1 (en) * | 2021-05-17 | 2022-11-23 | Heraeus Nexensos GmbH | Flexible heater with connectors |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB843904A (en) * | 1958-12-10 | 1960-08-10 | Therm O Lab Corp | Improvements in and relating to electrical heating elements |
DE3340313A1 (en) * | 1983-11-08 | 1985-05-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Domestic laundry drier |
EP0201967A1 (en) * | 1985-05-09 | 1986-11-20 | Ferro Techniek B.V. | Heating device |
-
1988
- 1988-07-25 IT IT8845750A patent/IT1225119B/en active
-
1989
- 1989-06-30 EP EP89111969A patent/EP0352499A3/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB843904A (en) * | 1958-12-10 | 1960-08-10 | Therm O Lab Corp | Improvements in and relating to electrical heating elements |
DE3340313A1 (en) * | 1983-11-08 | 1985-05-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Domestic laundry drier |
EP0201967A1 (en) * | 1985-05-09 | 1986-11-20 | Ferro Techniek B.V. | Heating device |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1674028A3 (en) * | 1991-12-20 | 2006-07-12 | Fisher & Paykel Appliances Ltd. | Dishwasher with a thick film heating plate |
EP1674028A2 (en) * | 1991-12-20 | 2006-06-28 | Fisher & Paykel Appliances Ltd. | Dishwasher with a thick film heating plate |
GB2290210A (en) * | 1993-02-15 | 1995-12-13 | Strix Ltd | Immersion heaters |
GB2290210B (en) * | 1993-02-15 | 1996-11-06 | Strix Ltd | Immersion heaters |
AU680234B2 (en) * | 1993-02-15 | 1997-07-24 | Strix Limited | Immersion heaters |
US5793929A (en) * | 1993-02-15 | 1998-08-11 | Strix Limited | Immersion heaters with heating elements in the form of printed circuit tracks |
US5946448A (en) * | 1993-02-15 | 1999-08-31 | Strix Limited | Methods of assembling immersion heaters with heating elements in the form of printed circuit tracks |
WO1994018807A1 (en) * | 1993-02-15 | 1994-08-18 | Strix Limited | Immersion heaters |
EP0890669A2 (en) * | 1997-07-11 | 1999-01-13 | BSH Bosch und Siemens Hausgeräte GmbH | Washing and/or drying machine with an electric heating element |
EP0890669A3 (en) * | 1997-07-11 | 1999-06-02 | BSH Bosch und Siemens Hausgeräte GmbH | Washing and/or drying machine with an electric heating element |
DE19749958B4 (en) * | 1997-11-03 | 2004-04-15 | Miele & Cie. Kg | Washing machine with a tubular heater |
DE19749958A1 (en) * | 1997-11-03 | 1999-05-06 | Miele & Cie | Washing machine with cylindrical washing solution container |
WO2002035885A1 (en) * | 2000-10-27 | 2002-05-02 | BSH Bosch und Siemens Hausgeräte GmbH | Electric heating body |
DE10209975A1 (en) * | 2002-03-07 | 2003-09-25 | Bsh Bosch Siemens Hausgeraete | Electrically heated washing machine |
EP1342827A1 (en) * | 2002-03-07 | 2003-09-10 | BSH Bosch und Siemens Hausgeräte GmbH | Electrically heatable household appliance |
WO2004042132A3 (en) * | 2002-11-07 | 2004-06-10 | Irca Spa | Conduit with improved electric heating element and clothes drying machine provided with such a conduit |
WO2004042132A2 (en) * | 2002-11-07 | 2004-05-21 | Irca S.P.A | Conduit with improved electric heating element and clothes drying machine provided with such a conduit |
EP1532919A1 (en) * | 2003-11-24 | 2005-05-25 | Indesit Company s.p.a. | Apparatus and method for heating a working fluid in washing machines |
EP1538255A1 (en) * | 2003-12-02 | 2005-06-08 | DBK David + Baader GmbH | Cover for a laundry dryer and process for its assembly |
US8371040B2 (en) | 2003-12-02 | 2013-02-12 | Dbk David + Baader Gmbh | Cover for a clothes dryer and assembling method thereof |
US7425688B2 (en) | 2004-05-07 | 2008-09-16 | Dbk David + Baader Gmbh | Heating assembly for a tumble dryer |
EP1852536A4 (en) * | 2005-02-24 | 2012-08-08 | Sharp Kk | Washer-dryer |
EP1852536A1 (en) * | 2005-02-24 | 2007-11-07 | Sharp Kabushiki Kaisha | Washer-dryer |
WO2007074115A1 (en) * | 2005-12-29 | 2007-07-05 | Arcelik Anonim Sirketi | A washing machine |
EP2060670A1 (en) * | 2007-11-14 | 2009-05-20 | BSH Bosch und Siemens Hausgeräte GmbH | Component for a device that guides liquid and household device for caring for articles of laundry with such a component |
CN101932765B (en) * | 2007-11-30 | 2012-08-15 | E.G.O.电气设备制造股份有限公司 | Method for operating a washing machine having a heating unit |
JP2011504774A (en) * | 2007-11-30 | 2011-02-17 | エーゲーオー エレクトロ・ゲレーテバウ ゲーエムベーハー | Method for operating a washing machine with a heating unit |
US7941884B2 (en) | 2007-11-30 | 2011-05-17 | E.G.O. Elektro-Geraetebau Gmbh | Method for operating a washing machine having a heating unit |
DE102007058833A1 (en) * | 2007-11-30 | 2009-06-10 | E.G.O. Elektro-Gerätebau GmbH | Heating device for a washing machine, washing machine with a heating device and method for operating a heating device |
WO2009068238A1 (en) * | 2007-11-30 | 2009-06-04 | E.G.O. Elektro-Gerätebau GmbH | Method for operating a washing machine having a heating unit |
WO2012019854A1 (en) * | 2010-08-11 | 2012-02-16 | Valeo Systemes Thermiques | Heater block for electric heating radiator |
FR2963866A1 (en) * | 2010-08-11 | 2012-02-17 | Valeo Systemes Thermiques | HEATING BLOCK FOR ELECTRIC HEATING RADIATOR |
US10690391B2 (en) | 2013-03-15 | 2020-06-23 | Whirlpool Corporation | Appliance using heated glass panels |
WO2014170210A1 (en) * | 2013-04-19 | 2014-10-23 | BSH Bosch und Siemens Hausgeräte GmbH | Panel heating device for heating water in a washing tub, washing machine and method for producing a panel heating device |
WO2016192332A1 (en) * | 2015-06-02 | 2016-12-08 | 青岛海尔滚筒洗衣机有限公司 | Washing machine with steam washing function, and control method |
EP3573425A1 (en) * | 2018-05-25 | 2019-11-27 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Heating device method of manufacturing a heating device |
DE102020103787A1 (en) | 2020-02-13 | 2021-08-19 | Miele & Cie. Kg | dryer |
EP4093151A1 (en) * | 2021-05-17 | 2022-11-23 | Heraeus Nexensos GmbH | Flexible heater with connectors |
WO2022243024A1 (en) * | 2021-05-17 | 2022-11-24 | Heraeus Nexensos Gmbh | Flexible heating element having connectors |
Also Published As
Publication number | Publication date |
---|---|
EP0352499A3 (en) | 1990-07-18 |
IT1225119B (en) | 1990-11-02 |
IT8845750A0 (en) | 1988-07-25 |
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