Heater and honeycomb structure including heater

{
  "publication_number": "US10301992B2",
  "country": "US",
  "kind": "B2",
  "title": "Heater and honeycomb structure including heater",
  "abstract": "A heater includes: a plate-like first heater substrate; an electrical heating wire that is provided on a first surface of the first heater substrate in a parallel circuit; electrodes that are connected to the electrical heating wire to allow current to flow in the electrical heating wire; and a plate-like cover substrate that covers the first surface of the first heater substrate, the electrical heating wire, and the electrodes with a second surface thereof. The electrical heating wire of the heater generates heat, so that the amount of heat is supplied. A honeycomb structure includes at least one heater that is provided so as to surround an outer wall thereof.",
  "claims": [
    "1. A heater comprising: a plate-like first heater substrate; an electrical heating wire that is provided on a first surface of the first heater substrate, wherein the electrical heating wire comprises a plurality of wire segments that are arranged in a parallel circuit; electrodes that are connected to the electrical heating wire to allow current to flow in the electrical heating wire; and a plate-like cover substrate that covers the first surface of the first heater substrate, the electrical heating wire, and the electrodes with a second surface of the cover substrate, wherein the electrical heating wire generates heat, so that the amount of heat is supplied.",
    "2. The heater according to claim 1, wherein the first heater substrate and/or the cover substrate contain Si 3 N 4 or Al 2 O 3.",
    "3. The heater according to claim 1, wherein the electrical heating wire contains at least one kind of metal selected from a group consisting of WC, TiN, TaC, ZrN, MoSi 2, Pt, Ru, and W.",
    "4. The heater according to claim 3, wherein the first heater substrate and/or the cover substrate contain Si 3 N 4, the electrical heating wire contains the metal and Si 3 N 4, and the volume resistivity of the electrical heating wire is in the range of 4.0×10 −5 to 2.0×10 −4 Ωcm.",
    "5. The heater according to claim 3, wherein the first heater substrate and/or the cover substrate contain Si 3 N 4, the electrical heating wire contains the metal and Si 3 N 4, and the thermal expansion coefficient of the electrical heating wire is in the range of 3.1 to 7.1 ppm/K.",
    "6. The heater according to claim 1, wherein the first heater substrate, the electrical heating wire provided on the first heater substrate, and the electrodes form a first substrate set, one or more substrate sets each of which is the same as the first substrate set are stacked on the first substrate set, and the cover substrate is provided on the substrate sets, or the first heater substrate, the electrical heating wire provided on the first heater substrate, the electrodes, and the cover substrate form a first substrate set, and the first substrate sets are stacked.",
    "7. The heater according to claim 6, wherein a position of a parallel pattern of the parallel circuit of the electrical heating wire of the substrate set provided on the first substrate set corresponds to a position of a parallel pattern of an electrical heating wire of a substrate set provided on the first heater substrate when seen from a stacking direction.",
    "8. The heater according to claim 6, wherein positions of parallel patterns of the parallel circuits of the electrical heating wires of the respective substrate sets deviate from each other when seen from a stacking direction.",
    "9. The heater according to claim 8, wherein the parallel patterns of the parallel circuits of the electrical heating wires of the respective substrate sets deviate from each other by “(a pitch between rows of the parallel circuit)/(the number of stacked substrate sets)” when seen from the stacking direction.",
    "10. A honeycomb structure including the heater according to claim 1, the honeycomb structure comprising: a honeycomb structure that includes partition walls defining a plurality of cells forming a channel for fluid and extending from a first end face to a second end face; and at least one heater that is provided so as to surround an outer wall of the honeycomb structure.",
    "11. The honeycomb structure according to claim 10, wherein a catalyst is loaded on the partition walls of the honeycomb structure."
  ],
  "description_excerpt": "“The present application is an application based on JP-2016-063134 filed on Mar. 28, 2016 with Japan Patent Office, the entire contents of which are incorporated herein by reference.”\n\nField of the Invention\n\nThe present invention relates to a heater and a honeycomb structure including the heater.\n\nDescription of the Related Art\n\nRegulations about the harmful materials, such as HC, CO, NOx, and PM exhausted from internal combustion engines, such as a gasoline engine and a diesel engine, have been reinforced on a global scale, but regulations about CO 2 emissions in addition to the above-mentioned emissions also have been reinforced for the current global warming issue and there is a demand on the improvement of fuel efficiency. For this reason, the improvement of the thermal efficiency of an engine has been examined to improve the fuel efficiency of an automotive gasoline engine and an automotive diesel engine.\n\nIn the past, exhaust gas has been purified using a honeycomb structure coated with a catalyst. However, since the temperature of exhaust gas of the engine is lowered when the thermal efficiency of the engine is improved, there is a problem in that the temperature of an exhaust gas purification catalyst becomes insufficient and purification capacity deteriorates. For this reason, an exhaust gas purification system having characteristics, in which a catalyst reaches an activating temperature immediately after the start of an engine and the catalyst having reached the activating temperature is hardly cooled and maintains catalytic activity even when low-temperature exhaust gas flows in, is required.",
  "cpc": [
    "F01N 3/2026",
    "B01D 2255/1021",
    "B01D 2255/1023",
    "B01D 2255/1025",
    "B01D 2255/2073",
    "B01D 2255/20738",
    "B01D 2255/20761",
    "B01D 2255/915",
    "B01D 2255/9155",
    "B01D 2258/01",
    "B01D 53/944",
    "B01D 53/9454",
    "B01D 53/9495",
    "B01J 35/04",
    "B01J 35/57",
    "F01N 2240/16",
    "F01N 3/101",
    "F01N 3/2013",
    "F01N 3/2842",
    "H05B 2203/014",
    "H05B 2203/024",
    "H05B 2214/03",
    "H05B 3/265",
    "H05B 3/42",
    "Y02T 10/12",
    "Y02T 10/26"
  ],
  "ipc": [
    "B01D 53/94",
    "B01J 35/57",
    "F01N 3/10",
    "F01N 3/20",
    "F01N 3/28",
    "H05B 3/26",
    "H05B 3/42"
  ],
  "assignees": [
    "NGK Insulators Ltd"
  ],
  "inventors": [
    "Naoya Takase",
    "Yoshimasa Kobayashi",
    "Yasuho AOKI"
  ],
  "filing_date": "2017-02-07",
  "publication_date": "2019-05-28",
  "grant_date": "2019-05-28",
  "priority_date": "2016-03-28",
  "application_number": "US-201715426387-A",
  "family_id": "59814148",
  "cited_by_count": 2,
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}