CERAMIC HEATER AND GLOW PLUG PROVIDED THEREWITH

• US 20100288747A1
• Filed: 10/28/2008
• Published: 11/18/2010
• Est. Priority Date: 10/29/2007
• Status: Abandoned Application

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Yamamoto, Ken
• Application Number:
  US12/740,676
• Publication Number:
  US 20100288747A1
• Time in Patent Office: Days
• US Class Current: 219/270
• CPC Class Codes: F23Q 7/001 Glowing plugs for internal-combustion engines
• CPC Class Codes: H05B 2203/027 Heaters specially adapted for glow plug igniters
• CPC Class Codes: H05B 3/141 Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
• CPC Class Codes: H05B 3/18 the conductor being embedded in an insulating material
• CPC Class Codes: H05B 3/48 heating conductor embedded in insulating material

Abstract

The ceramic heater comprises a heating resistor that includes opposing portions disposed side by side, a pair of lead members connected to ends of the heating resistor, and a ceramic base in which the heating resistor and the lead members are embedded, wherein a high heat conductivity member that has a heat conductivity higher than that of the ceramic base is disposed between the opposing portions in the ceramic base.

Claims

1. A ceramic heater comprising:

a heating resistor that includes opposing portions which are disposed to be opposite to each other;

a pair of lead members connected to ends of the heating resistor; and

a ceramic base in which the heating resistor and the lead members are embedded,

wherein a high heat conductivity member that has a heat conductivity higher than that of the ceramic base is disposed between the opposing portions being in the ceramic base.

2. The ceramic heater according to claim 1, wherein the high heat conductivity member is in contact with at least one of the opposing portions.

3. The ceramic heater according to claim 1, wherein the high heat conductivity member is disposed to extend along a longitudinal direction of the opposing portions.

4. The ceramic heater according to claim 1,

wherein the high heat conductivity member includes ceramics as a main component.

5. The ceramic heater according to claim 1,

wherein the high heat conductivity member includes, as a main component, the same material as that of the opposing portions.

6. The ceramic heater according to claim 1,

wherein the high heat conductivity member makes contact with the opposing portions, and

wherein the minimum distance between the high heat conductivity members is 0.3 mm or more.

7. A glow plug comprising the ceramic heater according to claim 1.