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Ceramic heater, and glow plug having the heater

A ceramic heater and ceramic substrate technology, applied in the fields of spark plugs and ceramic heaters, can solve the problem that the circumferential temperature distribution is not necessarily uniform, and achieve the effect of excellent uniformity

Active Publication Date: 2014-02-19
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the existing ceramic heater as mentioned above is as in Figure 7 As shown in the cross-section of the ceramic heater, there is a problem that the circumferential temperature distribution in the ceramic matrix 64 is not necessarily uniform.

Method used

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  • Ceramic heater, and glow plug having the heater
  • Ceramic heater, and glow plug having the heater
  • Ceramic heater, and glow plug having the heater

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Embodiment Construction

[0022] Hereinafter, a ceramic heater according to an embodiment of the present invention will be described in detail with reference to the drawings. figure 1 (a) is a perspective view showing the ceramic heater of this embodiment, figure 1 (b) is figure 1 X-X line profile in (a).

[0023] The ceramic heater 100 of the present invention includes: a heating resistor 10 including juxtaposed facing portions 10b, 10c, a pair of lead parts 11, 12 connected to the ends of the heating resistor 10, and a heating resistor embedded 10 and the ceramic substrate 2 of the lead parts 11 and 12. The heating resistor 10 has a U-shape composed of opposing portions 10b, 10c and a connection portion 10a connecting them. Then, the heating resistor 10 generates heat by passing a current through the heating resistor 10 through the lead parts 11 and 12 .

[0024] In this embodiment, the lead parts 11 and 12 are integrated with the opposing parts 10b and 10c using the same material as the heati...

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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.

Description

technical field [0001] The present invention relates to a ceramic heater and a spark plug provided with the ceramic heater. Background technique [0002] Conventionally, ceramic heaters have been used in various applications such as ignition heaters for petroleum fan heaters. In this ceramic heater, for example, a U-shaped heating element is embedded in a rod-shaped insulating base together with electrode leads connected to the ends (for example, Patent Document 1). [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-49279 [0004] But the existing ceramic heater as mentioned above is as in Figure 7 As shown in the cross-section of the ceramic heater, there is a problem that the circumferential temperature distribution in the ceramic base 64 is not necessarily uniform. That is, in the cross section, heat is easily conducted in the direction of a line connecting the facing portions 62 and 63 of the heating elements (region H side), and in a direction perpendicul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23Q7/00H05B3/18H05B3/48
CPCH05B2203/027H05B3/48H05B3/18H05B3/141F23Q7/001
Inventor 山元坚
Owner KYOCERA CORP