JPS59175167U

JPS59175167U - Oxygen concentration detector with heater

Info

Publication number: JPS59175167U
Application number: JP6866483U
Authority: JP
Inventors: 伸秀加藤; 隆生村瀬
Original assignee: 日本碍子株式会社
Priority date: 1983-05-09
Filing date: 1983-05-09
Publication date: 1984-11-22
Also published as: JPH0247494Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の加熱器付酸素濃度検出器の一実施例を
示す断面図であり、第２図は本考案の加熱器付酸素濃度
検出器に用いられる棒状加熱器の一具体例を示す斜視説
明図であり、さらに第３図は第２図における■−■断面
図を示す断面図である。そして、第４図は、本考案め加
熱器付酸素濃度検出器に用いられる金属製保護カバーの
一具体例を示す斜視説明図であり、第５図は従来の加熱
器付酸素濃度検出器と本考案の加熱器付酸素濃度検出器
の排気ガスに対する固体電解質温度の関係を示すグラフ
である。１：有底筒状固体電解質、２：ハウジング、３：タルク
、４：ワッシャ、５：リング、６：棒状加熱器、７：保
護カバー、８：セラミックヒータ一本体部、９：リード
端子、１０：リード端子鑞付部、１１：鑞材、１２：被
覆層、１３：耐熱コーテイング材、１４ニル−パー、１
５：排気ガス導入口。FIG. 1 is a sectional view showing an embodiment of the oxygen concentration detector with a heater of the present invention, and FIG. 2 is a sectional view showing a specific example of the rod-shaped heater used in the oxygen concentration detector with a heater of the present invention. FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 2. FIG. FIG. 4 is a perspective view showing a specific example of a metal protective cover used in the oxygen concentration detector with a heater according to the present invention, and FIG. 5 shows a conventional oxygen concentration detector with a heater. 3 is a graph showing the relationship between solid electrolyte temperature and exhaust gas of the heater-equipped oxygen concentration detector of the present invention. 1: Bottomed cylindrical solid electrolyte, 2: Housing, 3: Talc, 4: Washer, 5: Ring, 6: Rod-shaped heater, 7: Protective cover, 8: Ceramic heater main body, 9: Lead terminal, 10 : Lead terminal brazing part, 11: Brazing material, 12: Covering layer, 13: Heat-resistant coating material, 14 Nil-par, 1
5: Exhaust gas inlet.

Claims

[Scope of utility model registration request]

(1) A bottomed cylindrical solid electrolyte with porous platinum electrodes on its inner and outer surfaces, and a housing that exposes the closed end of the solid electrolyte to the exhaust gas, while keeping the inside of the cylinder airtightly isolated from the exhaust gas. and a metal protective cover surrounding the outer periphery of the closed end side of the solid electrolyte and having an exhaust gas inlet;
In the oxygen concentration detector with a heater having a rod-shaped heater inserted into the cylinder of the solid electrolyte, the rod-shaped heater is a ceramic heater in which a heating element having a positive temperature coefficient of resistance is provided in ceramic. a lead terminal brazing part is provided on the outer surface of the ceramic heater main body part, and the lead terminal brazing part is electrically connected to the heating element, and a predetermined lead terminal is brazed and fixed to the lead terminal brazing part with a solder material wrapped in silver; Furthermore, a coating layer made of an unconventional metal is provided on the surface of the solder material to which the lead terminal is fixed, and a heat-resistant coating material is coated on the surface of the coating layer. Oxygen concentration detector.

(2) The oxygen concentration detector with a heater according to claim 1, wherein the heat-resistant coating material is an inorganic coating material.

(3) The oxygen concentration detector with a heater according to claim 1 or 2, wherein the coating layer is a nickel plating layer.

(4) The temperature coefficient of resistance of the ceramic heater is 0.
3%/°C or more, the oxygen concentration detector with a heater according to any one of claims 1 to 3 of the claims registered as a utility model.