EP3864264A1 - Plaque chauffante pouvant être chauffée électriquement - Google Patents

Plaque chauffante pouvant être chauffée électriquement

Info

Publication number
EP3864264A1
EP3864264A1 EP19805894.3A EP19805894A EP3864264A1 EP 3864264 A1 EP3864264 A1 EP 3864264A1 EP 19805894 A EP19805894 A EP 19805894A EP 3864264 A1 EP3864264 A1 EP 3864264A1
Authority
EP
European Patent Office
Prior art keywords
metal foils
circumferential direction
heating disc
metal
layer stack
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Withdrawn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
EP19805894.3A
Other languages
German (de)
English (en)
Inventor
Peter Hirth
Ferdi Kurth
Thomas HÄRIG
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.)
Vitesco Technologies GmbH
Original Assignee
Vitesco Technologies GmbH
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 Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Publication of EP3864264A1 publication Critical patent/EP3864264A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/44—Honeycomb supports characterised by their structural details made of stacks of sheets, plates or foils that are folded in S-form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to an electrically heatable heating disc for use within a device for exhaust gas aftertreatment, the heating disc being formed by a layer stack formed from a plurality of stacked metal foils, which is wound into a honeycomb body, the layer stack alternatingly arranged in a roughly structured and finely structured manner has smooth metal foils, and wherein the honeycomb body has at least one electrical contact on a radial edge region, the first metal foils running out offset from one another by the winding in the circumferential direction of the heating disk.
  • the heating disks are preferably produced from a metallic base material and produced, for example, by winding up a stack of layers of differently structured metal foils.
  • a current is usually passed through the heating disks, the heating disk being heated using the ohmic resistance.
  • the electrical contacting of the heating disc is usually carried out by an electrical feed through the Catalyst or the jacket surrounding the heating disc is guided.
  • US 5433926 A shows an example of an electrically heatable heating disk in a device for exhaust gas aftertreatment.
  • US 2015011115 A1 shows an electrical feedthrough for making electrical contact with the heating disk in the interior of the jacket surrounding the catalyst.
  • a disadvantage of the devices in the prior art is, in particular, that the uniform distribution of the current introduced into the heating disk is not ensured to a sufficient extent in order to also meet the increased demands on the heating power at present and in the future. This is disadvantageous because the currents introduced must also be increased in order to achieve higher heating outputs. If the current distribution is not sufficient, local hot spots occur, which are disadvantageous with regard to the durability of the heating disc.
  • the previously known geometric design of the heating disk in the area of electrical contacting can result in flow bypasses being formed past the heating disk, which is detrimental to the efficiency of the heating device formed by the heating disk.
  • the object with regard to the electrically heated heating disk is achieved by a heating disk with the features of claim 1.
  • An embodiment of the invention relates to an electrically heatable heating disc for use within an on device for exhaust gas aftertreatment, the heating disc being formed by a layer stack formed from a plurality of stacked metal foils, which is wound up into a honeycomb body, the layer stack alternatingly arranged in a roughly structured and fine manner has structured or smooth metal foils, and wherein the honeycomb body has at least one electrical contact on a radial edge region, first metal foils running out offset from one another by winding in the circumferential direction of the heating disk, finely structured or smooth second metal foils running out between the first metal foils running out in the circumferential direction are arranged, which extend beyond the respective ends of the leaking first metal foils in the circumferential direction.
  • Coarse-structured metal foils mean metal foils, in which a corrugation has been molded.
  • the corrugation can extend over the entire metal foil or only over partial areas of the metal foil.
  • a smooth metal foil has no structuring.
  • a finely structured metal foil can also have a shaped structure, but the structure, for example the corrugation, is significantly less than that of the coarsely structured metal foil.
  • the height and the width of the structure are much smaller with a finely structured metal foil than with a coarsely structured metal foil.
  • the finely structured metal foil or the smooth metal foil are primarily used to separate the coarsely structured metal foils which are directly adjacent to one another, so that the coarsely structured metal foils do not get caught in one another during winding.
  • the smooth or finely structured metal foils are longer than the coarsely structured metal foils, so that they protrude beyond the coarsely structured metal foils that run out offset to one another.
  • the smooth or finely structured layers are preferably dimensioned such that they end at the same point when viewed in the circumferential direction when the heating disk is fully rolled up.
  • the smooth or finely structured metal foils preferably each have different lengths which compensate for the offset resulting from the winding.
  • Such a bead-like shape on the radial outer region of the heating disk would lead to a cross section deviating from the ideal circular shape. This is avoided by the successive leakage in the circumferential direction, which in particular can also reduce or completely prevent the undesired bypass flows past the heating disk. It is particularly advantageous if the offset first metal foils are roughly structured.
  • the coarsely structured metal foils contribute to the thickness of the layer stack to a much greater extent than the finely structured or the smooth metal foils, since the coarsely structured metal foils form the channel structures of the heating disk through their corrugation, which can be flowed through in the axial direction.
  • the second metal foils in the partial section which projects in the circumferential direction beyond the respectively directly adjacent first metal foils have an increased material thickness compared to the remaining extent of the respective second metal foil.
  • the increase in the material thickness of the second metal foils is advantageous in order to keep the overall material thickness in this area, which is used in particular for electrical contacting for current introduction, as high as in the sections with the first metal foils, or even to increase it.
  • a sufficiently high material thickness is necessary in order to achieve a uniform introduction of the current over the cross section of the wound layer stack. This advantageously prevents, in particular, undesired hot spots that could arise due to the introduced current with an introduction area of insufficient material thickness.
  • a preferred exemplary embodiment is characterized in that the second metal foils extend in the circumferential direction up to a common end region.
  • the extension to a common end region is geous before to ensure a uniform material thickness of the wound layer stack in the area of electrical contacting.
  • the area in which the electrical contacting takes place must have a certain minimum material thickness in order to avoid excessive heating due to the introduction of current.
  • the material volume in the area of the current input must be adjusted accordingly.
  • the material volume available for introducing the current is successively reduced, while the continuation of the second metal foils and the simultaneous increase in the material thickness after the respective first metal foils run out result in an increase in the material volume, so that the material volume ultimately available corresponds at least to the material volume which the layer stack has before the first metal foil runs out.
  • the electrical contacting is arranged on the partial section of the second metal foils that protrudes beyond the first metal foils in the circumferential direction.
  • a sufficient material thickness or a sufficient material volume is provided in this subsection to enable the introduction of current without risking exceeding a defined maximum temperature.
  • the material thickness of the second metal foils in the projecting partial section is at least 1.5 to four times higher than the remaining extent of the respective second metal foils.
  • the increase by a factor of 1.5 to four is advantageous in order to ensure a sufficient material strength or a sufficient material volume despite the leakage of the first metal foils without risking damage as a result of excessive temperatures. Since an adjacent second metal foil is continued for each first metal foil that runs out, increasing the material thickness of the second metal foil by a factor of 1.5 to four ensures that the material volume available in the area of the introduction point is at least as large as in FIGS Areas of the layer stack in which none of the metal foils has yet leaked.
  • the second metal foils which extend over the first metal foils which are running out are arranged in the radial edge region of the honeycomb body. This is before geous to ensure that a region for the electrical contacting ge can be formed in particular at a radially outer region by the longer second metal foils.
  • the layer stack is wound up, but the layer stack does not come into contact with itself, but rather a gap is formed between the individual turns of the wound layer stack, so that in particular there is no electrical contact between the turns.
  • the elongated second metal foils result in the radially outward facing the area of the heating disc where the electrical contacting can advantageously take place.
  • the layer stack alternately has a first metal foil and a second metal foil, the second metal foils having a longer circumferential extension than the first metal foils. This prevents the first metal foils from getting caught in one another when the layer stack is being wound up.
  • the honeycomb body has two electrical contacts, the electrical contact between the current supply or the current discharge and the layer stack each taking place in a region which is formed from second metal foils projecting beyond the first metal foils in the circumferential direction.
  • a wound honeycomb body the turns of which are electrically insulated from one another, for example by spacing or by introducing an electrical insulator, can be contacted electrically very easily with such an arrangement of the feed and the discharge.
  • Fig. 1 is a sectional view through an inventive
  • FIG. 1 shows a sectional view through part of a heating disc 1 produced from a wound stack of layers.
  • the heating disc 1 is formed from a stack of layers which consists of a plurality of metal foils 2, 3 stacked on top of one another.
  • first metal foils 2 with a coarse structure or corrugation and second metal foils 3 with a fine structure or microwave are shown.
  • the first and second metal foils 2, 3 are alternately stacked on top of one another and thus form the layer stack.
  • the heating disk 1 is produced by winding up the layer stack.
  • the first metal foils 2 all have the same length. As a result of the winding, the first metal foils 2 move relative to one another in the circumferential direction and due to the different radii that the first metal foils 2 assume in the wound state, a crescent-like shape is produced which is produced by the first metal foils 2 which run offset in the circumferential direction 4 from one another.
  • the second metal foils 3 are longer than the first metal foils 2 and therefore extend farther in the circumferential direction 4 than the first metal foils 2 which run out.
  • the successive discontinuation of the first metal foils 2 reduces the thickness of the layer stack in the circumferential direction 4 ever further.
  • the layer stack is finally formed only from the longer second metal foils 3.
  • the layer stack has a significantly lower thickness in this area, which is only formed from the second metal foils 3, since the first metal foils 2 no longer protrude into this area. This is particularly evident because of the rough structure of the first Metal foils 2 cells formed are no longer present in this area.
  • the second metal foils 3 are designed such that they have a thickening immediately before the respectively directly adjacent first metal foil 2 runs out, the second metal foils 3 having this increased material thickness up to their own end region.
  • the top metal foil and the bottom metal foil of the layer stack, which are both formed by finely structured second metal foils 3, also have an increased material thickness.
  • the thickening of these two metal foils 5 takes place in the circumferential direction 4 considered before the first leakage of the first metal foil 2 takes place. This thickening also serves, among other things, to increase the stability of the heating disk 1.
  • the reference numeral 6 indicates an electrical contact, which is used for introducing or discharging current into the layer stack or out of the layer stack.
  • the electrical contact 6 is arranged in a region which is formed entirely from second metal foils 3.
  • FIG. 1 has no restrictive character and serves to clarify the inventive concept.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne une plaque chauffante (1) pouvant être chauffée électriquement destinée à être utilisée à l'intérieur d'un dispositif de post-traitement des gaz d'échappement, la plaque chauffante (1) étant formée par un empilement de couches formé à partir d'une pluralité de films métalliques (2, 3, 5) empilés les uns sur les autres, lequel empilement est enroulé de manière à former un corps en nid d'abeilles, l'empilement de couches comprenant des films métalliques (3, 5) structurés grossièrement (2) et structurés finement ou lisses disposés en alternance, et le corps en nid d'abeilles comprenant au moins un contact électrique (6) au niveau d'une région de bord radiale, des premiers films métalliques (2) se terminant de manière décalée les uns par rapport aux autres de par l'enroulement dans la direction périphérique (4) de la plaque chauffante (1), des deuxièmes films métalliques (3) structurés finement ou lisses étant disposés entre les premiers films métalliques (2) se terminant de manière décalée dans la direction périphérique (4), lesquels deuxièmes films métalliques s'étendent au-delà des extrémités respectives des premiers films métalliques (2) se terminant.
EP19805894.3A 2018-10-09 2019-10-08 Plaque chauffante pouvant être chauffée électriquement Withdrawn EP3864264A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018217244.7A DE102018217244A1 (de) 2018-10-09 2018-10-09 Elektrisch beheizbare Heizscheibe
PCT/EP2019/077219 WO2020074511A1 (fr) 2018-10-09 2019-10-08 Plaque chauffante pouvant être chauffée électriquement

Publications (1)

Publication Number Publication Date
EP3864264A1 true EP3864264A1 (fr) 2021-08-18

Family

ID=68618107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19805894.3A Withdrawn EP3864264A1 (fr) 2018-10-09 2019-10-08 Plaque chauffante pouvant être chauffée électriquement

Country Status (7)

Country Link
US (1) US11371408B2 (fr)
EP (1) EP3864264A1 (fr)
JP (1) JP7520825B2 (fr)
KR (1) KR102505467B1 (fr)
CN (1) CN112867851B (fr)
DE (1) DE102018217244A1 (fr)
WO (1) WO2020074511A1 (fr)

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CN112867851B (zh) 2023-10-31
KR20210066905A (ko) 2021-06-07
CN112867851A (zh) 2021-05-28
US20210222600A1 (en) 2021-07-22
US11371408B2 (en) 2022-06-28
DE102018217244A1 (de) 2020-04-09
JP7520825B2 (ja) 2024-07-23
JP2022504563A (ja) 2022-01-13
WO2020074511A1 (fr) 2020-04-16

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