JPS60106159U

JPS60106159U - Oxygen concentration detector with heater

Info

Publication number: JPS60106159U
Application number: JP20283083U
Authority: JP
Inventors: 伸秀加藤; 隆生村瀬
Original assignee: 日本碍子株式会社
Priority date: 1983-12-23
Filing date: 1983-12-23
Publication date: 1985-07-19
Also published as: JPH035902Y2

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 the drawing]

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
を示す断面図である　゛る。そして、第４図は、本考案
の加熱器付酸素濃度検出器に用いる金属製保護カバーの
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
排気ガス温度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（無電解メッキ層）、１３ニル−バー、１４：
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. 4 is a perspective view showing a specific example of a metal protective cover used in the oxygen concentration detector with a heater of the present invention, and FIG. 5 shows a conventional oxygen concentration detector with a heater and the present invention. 3 is a graph showing the relationship between the solid electrolyte temperature and the exhaust gas temperature of the heater-equipped oxygen concentration detector of FIG. 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 (electroless plating layer), 13 nyl bar, 14:
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 the closed end of the solid electrolyte is exposed to the gas to be measured, while the inside of the cylinder is housed in an airtight isolation from the gas to be measured. a metal protective cover that surrounds the outer periphery of the closed end side of the solid electrolyte and has an inlet for the gas to be measured, and a rod-shaped heater that is inserted into the cylinder of the solid electrolyte. In the oxygen concentration detector, a ceramic heater in which a ceramic heating element having a positive temperature coefficient of resistance is provided is used as the rod-shaped heater, and a lead is provided on the outer surface of the main body of the ceramic heater to be electrically connected to the heating element. A terminal brazing part is provided, a predetermined lead terminal is fixed to the lead terminal brazing part with a solder material containing silver, and a metal other than silver is applied to the surface of the solder material which fixes the lead terminal. An oxygen concentration detector with a heater, characterized in that it has a coating layer made of an electroless plating layer.

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

(3) The temperature coefficient of resistance of the ceramic heater is 0.
3%/'C or more, the oxygen concentration detector with a heater according to claim 1 or 2 of the utility model registration claim.