EP3127397B1 - Dispositif chauffant, appareil ménager et procédé - Google Patents

Dispositif chauffant, appareil ménager et procédé Download PDF

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Publication number
EP3127397B1
EP3127397B1 EP15715993.0A EP15715993A EP3127397B1 EP 3127397 B1 EP3127397 B1 EP 3127397B1 EP 15715993 A EP15715993 A EP 15715993A EP 3127397 B1 EP3127397 B1 EP 3127397B1
Authority
EP
European Patent Office
Prior art keywords
substrate
pores
moisture
insulating layer
insulation layer
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.)
Active
Application number
EP15715993.0A
Other languages
German (de)
English (en)
Other versions
EP3127397A1 (fr
Inventor
Alexander Dinkel
Sebastian Matzinger
Klemens Roch
Philipp Schaller
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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Publication date
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Publication of EP3127397A1 publication Critical patent/EP3127397A1/fr
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Publication of EP3127397B1 publication Critical patent/EP3127397B1/fr
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Classifications

    • 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
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material

Definitions

  • the present invention relates to a heating device, a household appliance and a method.
  • Household appliances can have a heating device for heating a fluid such as air, vapor, rinsing solution or water.
  • a heating device for heating a fluid such as air, vapor, rinsing solution or water.
  • the EP 1 672 958 A2 describes such a heating device in the form of a pipe heater.
  • the pipe heater comprises a metallic substrate, a heating conductor and an electrically insulating insulation layer arranged between the heating conductor and the substrate. In order to prevent direct contact of the fluid to be heated with the heating conductor, the latter is encapsulated together with the insulation layer.
  • the WO 00/70915 A1 describes a heating device with a tubular substrate, a heating conductor and an insulation layer arranged between the substrate and the heating conductor.
  • the insulation layer has pores. To prevent the pores from absorbing moisture, the insulation layer is impregnated with a silicon-based compound.
  • a heating device for a domestic appliance with a substrate which has a first side facing a fluid to be heated and a second side facing away from the fluid to be heated, a flat heating conductor and an insulation layer arranged between the second side of the substrate and the flat heating conductor, which Has pores proposed.
  • the pores are sealed with a moisture-impermeable coating, the pores each having a wall delimiting them, the moisture-impermeable coating being applied to the respective wall and the moisture-impermeable coating being applied to the respective wall of the cavities in a sol-gel process.
  • Encapsulation or coating of the heating conductor can be dispensed with.
  • the heating conductor is therefore preferably unencapsulated or uncoated.
  • the first side of the substrate can also be referred to as the usage side.
  • the second side of the substrate can also be referred to as the heating side.
  • the substrate can be a wall of a receiving area of the household appliance.
  • the fluid to be heated can be air, vapor, water or rinsing liquor.
  • the substrate is preferably metallic.
  • the substrate can be made from a steel sheet.
  • the pores each have a wall that delimits them, the moisture-impermeable coating being applied to the respective wall.
  • the insulation layer is particularly porous. This means that the insulation layer has a large number of micropores. The pores can be closed or connected to one another.
  • the moisture-impermeable coating is applied to the respective wall of the cavities in a sol-gel process.
  • a “sol-gel process” is to be understood as a method for producing non-metallic, inorganic or hybrid polymeric materials from colloidal dispersions, the so-called sols.
  • the insulation layer is a ceramic layer.
  • the insulation layer can be an aluminum oxide layer. In this way, particularly good electrical insulation properties of the insulation layer are achieved. Furthermore, the use of aluminum oxide as a coating material is particularly cost-effective.
  • the flat heating conductor and / or the insulation layer are sprayed onto the substrate in a thermal spraying process.
  • thermal spraying processes molten bath spraying, electric arc spraying, flame spraying, high-speed flame spraying, detonation spraying, cold gas spraying and / or laser spraying.
  • the insulation layer is an amorphous glass-like layer.
  • the insulation layer is a water glass layer.
  • Such a water glass layer preferably does not have any glass components that promote conductivity, such as sodium, calcium or the like.
  • the water glass layer can be applied in a sol-gel process.
  • the flat heating conductor is made from a CrNi and / or an FeCr steel.
  • a household appliance with such a heating device is also proposed.
  • the household appliance can be a dishwasher, a washing machine, a tumble dryer, a cooking device such as an oven or a steam cooker, a kettle, a boiler, a water heater or the like.
  • the heating device can be part of the household appliance.
  • a method for producing a heating device for a household appliance is proposed with the following steps: providing a substrate with a first side and a second side; Applying an insulating layer having pores to the second side of the substrate; Applying a flat heating conductor to the insulation layer; Sealing the pores of the insulation layer with a moisture-proof Coating, wherein the moisture-impermeable coating is applied to walls of the pores of the insulation layer and wherein the liquid-impermeable coating is applied in a sol-gel process; and building up the substrate together with the insulation layer and the heating conductor in such a way that the first side of the substrate faces a fluid to be heated and the second side of the substrate faces away from the fluid to be heated.
  • the moisture-impermeable coating is applied to the walls of the pores of the insulation layer.
  • the liquid-impermeable coating is applied in a sol-gel process.
  • the insulation layer and / or the flat heating conductor are applied in a thermal spraying process.
  • the Fig. 1 shows a schematic perspective view of an embodiment of a household appliance 1.
  • the household appliance 1 can for example be a dishwasher, a washing machine, a tumble dryer, a cooking device such as an oven or a steam cooker, a kettle or the like.
  • the household appliance 1 has a receiving area 2 which can be closed by a door 3.
  • the receiving area 2 and the door 3 can form a receiving chamber 4 of the household appliance 1.
  • the receiving chamber 4 can be, for example, a washing chamber or a cooking chamber of the household appliance 1.
  • the receiving area 2 can be arranged in the interior of a housing of the household appliance 1.
  • Door 3 is in the Figure 1 shown in their open position.
  • the door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3.
  • the receiving area 2 has a floor 6, a ceiling 7 arranged opposite the floor 6, a rear wall 8 arranged opposite the door 3 and two side walls 9, 10 arranged opposite one another.
  • the receiving area 2 is in particular cuboid.
  • the receiving area 2 can be, for example, circular-cylindrical.
  • the receiving area 2 is preferably made at least partially from a metal material, in particular from a sheet steel.
  • the household appliance 1 also has a heating device 11, in particular a flat heating device.
  • a heating device 11 in particular a flat heating device.
  • “flat” is to be understood as meaning that the heating device 11 is flat and / or is plate-shaped.
  • the heating device 11 can have a thickness of a few fractions of millimeters up to a few millimeters.
  • the heating device 11 is preferably provided on the outside of the receiving area 2.
  • the heating device 11 can completely cover the floor 6, the ceiling 7, the rear wall 8 and the side walls 9, 10.
  • the heating device can only partially cover the floor 6, the ceiling 7, the rear wall 8 and the side walls 9, 10.
  • the heating device 11 can also be provided on the door 3.
  • the Fig. 2 shows a schematic sectional view of the ceiling 7 with the heating device 11.
  • the ceiling 7 is referred to below as the substrate.
  • the substrate can furthermore comprise the base 6, the rear wall 8, the side walls 9, 10 and / or the door 3.
  • the heating device 11 has the metallic substrate 7.
  • the substrate 7 has a usage side 12 and a heating side 13 arranged opposite the usage side 12.
  • the use side 12 faces a fluid 14 to be heated.
  • the fluid can be air, vapor, water or rinsing liquor.
  • the usage side 12 can also be referred to as the first side of the substrate 7.
  • the heating side 13 faces away from the fluid 14 to be heated.
  • the heating side 13 can also be referred to as the second side of the substrate 7.
  • the heating device 11 also has a flat heating conductor 15.
  • the heating conductor 15 is provided on the second side 13 of the substrate 7.
  • the heating conductor 15 preferably has a plurality of conductor tracks 16.
  • the conductor tracks 16 are preferably connected to one another and run in a meandering shape on the metallic substrate 7.
  • the heating conductor 15 is made, for example, from a CrNi steel and / or an FeCr steel.
  • the insulation layer 17 is preferably a ceramic layer applied directly to the substrate 7 in a thermal spray process.
  • the insulation layer 17 is made of aluminum oxide.
  • the Fig. 3 shows an enlarged schematic sectional view of the heating device 11.
  • the insulation layer 17 preferably has a plurality of pores 18, of which in FIG Fig. 3 only one is provided with a reference number.
  • each pore 18 a wall 19 delimiting the respective pore 18.
  • the pores 18 are sealed with a moisture-impermeable, in particular water-impermeable, coating 20.
  • the moisture-impermeable coating 20 is preferably applied only to the walls 19 of the pores 18.
  • the coating 20 is an amorphous glass-like layer.
  • the coating 20 can be a water glass layer. Such a water glass layer preferably does not have any glass components that promote conductivity, such as sodium, calcium or the like.
  • the coating is preferably applied to the walls 19 in a sol-gel process.
  • the heating conductor 15 is not encapsulated and not coated.
  • the heating conductor 15 can be applied to the insulation layer 17 in a thermal spray process.
  • the insulation layer 17 Because the pores 18 of the insulation layer 17 are sealed with the moisture-impermeable coating 20, the absorption of moisture into the porous insulation layer 17 is prevented. This ensures that the insulation layer 17 permanently retains its electrically insulating property even in the case of high humidity.
  • the substrate 7 is provided with the first side 12 facing the fluid 14 to be heated and the second side 13 facing away from the fluid 14 to be heated.
  • the insulation layer 17 having the pores 18 is applied to the second side 13 of the substrate 7. The insulation layer 17 is sprayed directly onto the substrate 7 in a thermal spraying process.
  • the flat heating conductor 15 is applied to the insulation layer 17 in a thermal spraying process.
  • the conductor tracks 16 of the heating conductor 15 can be formed with the aid of a template when applied to the insulation layer 17.
  • the conductor tracks 16 can be formed with the aid of an abrasive process.
  • the Fig. 5 shows in a schematic sectional view the substrate 7 with the sprayed-on porous insulation layer 17 and the heating conductor 15.
  • a step S4 the pores 18 of the insulation layer 17 are then sealed with the moisture-impermeable coating 20.
  • the sealing of the pores can alternatively take place before the heating conductor 15 is sprayed on.
  • the pores 18 are preferably completely filled with a coating liquid 21 in step S4.
  • the pores 18 are infiltrated with the coating liquid 21.
  • the coating liquid 21 is a sol.
  • a “sol” is to be understood as meaning a colloidal dispersion.
  • the coating liquid 21 is absorbed by the insulation layer 17 with the aid of capillary forces.
  • the heating device 11 is then tempered.
  • a step S5 the substrate 7-10 together with the insulation layer 17 and the heating conductor 15 are installed in such a way that the first side 12 of the substrate 7-10 facing the fluid 14 to be heated and the second side 13 of the substrate 7-10 faces away from the fluid 14 to be heated.

Landscapes

  • Resistance Heating (AREA)

Claims (9)

  1. Dispositif chauffant (11) pour un appareil électroménager (1), comportant un substrat (7-10) qui présente une première face (12) tournée vers un fluide à réchauffer (14) et une seconde face (13) opposée au fluide à réchauffer (14), un conducteur chauffant plat (15) et une couche d'isolation (17) disposée entre la seconde face (13) du substrat (7-10) et le conducteur chauffant plat (15), laquelle couche d'isolation présente des pores (18) qui sont scellés avec un revêtement imperméable à l'humidité (20), dans lequel les pores (18) présentent une paroi (19) les délimitant respectivement, dans lequel le revêtement imperméable à l'humidité (20) est appliqué sur la paroi respective (19) et dans lequel le revêtement imperméable à l'humidité (20) est appliqué selon un procédé sol-gel sur la paroi respective (19) des cavités (18).
  2. Dispositif chauffant selon la revendication 1, caractérisé en ce que la couche d'isolation (17) est une couche de céramique.
  3. Dispositif chauffant selon la revendication 1 ou 2, caractérisé en ce que le conducteur chauffant plat (15) et/ou la couche d'isolation (17) sont projetés sur le substrat (7-10) selon un procédé de pulvérisation thermique.
  4. Dispositif chauffant selon l'une des revendications 1 à 3, caractérisé en ce que la couche d'isolation (17) est une couche de type verre amorphe.
  5. Dispositif chauffant selon l'une des revendications 1 à 4, caractérisé en ce que la couche d'isolation (17) est une couche de verre soluble.
  6. Dispositif chauffant selon l'une des revendications 1 à 5, caractérisé en ce que le conducteur chauffant plat (15) est fabriqué à partir d'un acier CrNi et/ou FeCr.
  7. Appareil électroménager (1) comportant un dispositif chauffant (11) selon l'une des revendications 1 à 6.
  8. Procédé destiné à la fabrication d'un dispositif chauffant (11) pour un appareil électroménager (1) selon l'une des revendications 1 à 6, comportant les étapes suivantes :
    (S1) mise à disposition d'un substrat (7-10) comportant une première face (12) et une seconde face (13) ;
    (S2) application d'une couche d'isolation (17) présentant des pores (18) sur la seconde face (13) du substrat (7-10) ;
    (S3) application d'un conducteur chauffant plat (15) sur la couche d'isolation (17) ;
    (S4) scellement des pores (18) de la couche d'isolation (17) avec un revêtement imperméable à l'humidité (20), dans lequel le revêtement imperméable à l'humidité (20) est appliqué sur des parois (19) des pores (18) de la couche d'isolation (17) et dans lequel le revêtement imperméable à l'humidité (20) est appliqué selon un procédé sol-gel ; et
    (S5) obstruction du substrat (7-10) avec la couche d'isolation (17) et le conducteur chauffant (15) de telle sorte que la première face (12) du substrat (7-10) est tournée vers un fluide à réchauffer (14) et la seconde face (13) du substrat (7-10) est opposée au fluide à réchauffer (14).
  9. Procédé selon la revendication 8, caractérisé en ce que la couche d'isolation (17) et/ou le conducteur chauffant plat (15) sont appliqués selon un procédé de pulvérisation thermique.
EP15715993.0A 2014-04-04 2015-03-25 Dispositif chauffant, appareil ménager et procédé Active EP3127397B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014206592.5A DE102014206592A1 (de) 2014-04-04 2014-04-04 Heizeinrichtung, Haushaltsgerät und Verfahren
PCT/EP2015/056405 WO2015150188A1 (fr) 2014-04-04 2015-03-25 Dispositif chauffant, appareil ménager et procédé

Publications (2)

Publication Number Publication Date
EP3127397A1 EP3127397A1 (fr) 2017-02-08
EP3127397B1 true EP3127397B1 (fr) 2020-08-19

Family

ID=52829066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15715993.0A Active EP3127397B1 (fr) 2014-04-04 2015-03-25 Dispositif chauffant, appareil ménager et procédé

Country Status (3)

Country Link
EP (1) EP3127397B1 (fr)
DE (1) DE102014206592A1 (fr)
WO (1) WO2015150188A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9525082B2 (en) * 2013-09-27 2016-12-20 Sunpower Corporation Solar cell contact structures formed from metal paste
DE102022205495A1 (de) 2022-05-31 2023-11-30 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zur Herstellung einer solchen Heizeinrichtung
DE102022209108A1 (de) 2022-09-01 2024-03-07 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung zum Erhitzen von Flüssigkeit und Verfahren zum Betrieb einer Heizeinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1019721A (en) * 1962-10-31 1966-02-09 Frank Christen Walz Improvements in electric heaters
US3791863A (en) * 1972-05-25 1974-02-12 Stackpole Carbon Co Method of making electrical resistance devices and articles made thereby
JP2745438B2 (ja) * 1990-07-13 1998-04-28 株式会社荏原製作所 加熱用伝熱材料及び発熱体とそれを用いた加熱装置
EP1186207A4 (fr) * 1999-05-18 2005-06-15 Advanced Heating Technologies Elements electriques chauffants et procede de production de ces derniers
DE102004060382A1 (de) 2004-12-15 2006-06-29 Bleckmann Gmbh & Co. Kg Dickschicht-Rohr-Heizung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102014206592A1 (de) 2015-10-08
WO2015150188A1 (fr) 2015-10-08
EP3127397A1 (fr) 2017-02-08

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