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单头电热管短路原因分析

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加热管|单头电热管|引线|电极|结构

加热管|单头电热管|引线|电极|结构

小直径一端出线加热管(单头电热管),总发现二引出线之间出现短路、断线问题、加热管电极开路等问题的出现,目前由于设备对加热管小体积和高能量要求的不断提高,很多生产商盲目的选材和生产,造成加热管的质量品质下降,问题频繁的发生。很多人,问题产生了,并不去分析、查找问题所在,就轻易去下结论,怀疑电热管绕丝的氧化镁芯杆的质量有问题。让制造氧化镁芯杆的厂家把原来含镁量为95%的氧化镁改为98%甚至99%的纯度,以提高二引出线不产生短路的概率,然而事实并非如此。

那么造成单头电热管短路、开路的原因是什么呢?
1、穿引出线的二孔的距离实在太近,造成单头电热管短路。
2、电热管发热区的位置已移向引出线端口处,且暴露在空气中。
3、过高的温度,与二引出线的额定电压造成短路的充分必要条件。
4、在使用时模具孔的孔径口处呈喇叭型,这是由于模块钻孔工艺的缺陷,影响导热。
5、弹头电热管管口在引出线的端部出现粉松现象,从而影响导热及空气击穿,造成单头电热管短路。
6、劣质的封口硅胶与引出线根部的第一圈螺丝距离实在太近,这时制作工艺产生。
7、用铁铬铝作为引出线的过大电阻率以增加电热管引出线的温度而出现事故。

在单头电热管的设计、生产过程中,加热管的电阻值大小,决定了加热器的功率值,国标明确规定电热管功率误差范围及电热管电阻值误差范围,下面文章我将举例介绍如何计算1支铝质加热管 的电阻范围值,在什么电阻范围内的加热管才符合相关标准。

The small diameter end of line heating tube (single head electric heat pipe单头电热管), always found two lead short-circuit, open-circuit disconnection, problems such as line between appearance, due to small volume and improve equipment with high energy requirements for heating pipe, many manufacturers blind material and production, resulting in the decline of the quality of the heating pipe, frequent problems. A lot of people, problems have arisen, not to analyze, find the problem, easy to conclude that electric heating tube, magnesium oxide core rod winding silk quality problems. Making magnesium oxide core rod manufacturers of the original magnesium content is 95% of magnesium oxide to 98% or even 99% of the purity, in order to improve the two pinout does not produce short circuit probability, but the fact is not true.
So the cause of electric short circuit单头电热管短路, open circuit is what?
Two hole 1, wear pinout the distance is too close.
2, the position of fever has moved to the outgoing line port, and exposed in the air.
3, the high temperature caused by short circuit, the necessary and sufficient conditions of rated voltage two lead-out wire.
4, the mold in the use of holes in a horn mouth aperture, this is due to defects in the drilling process module, thermal effect.
5, pipe in mouth end pinout appear powder loose phenomenon, thus affecting the heat conduction and breakdown in air.
Sealing silica gel 6, inferior and lead wire of the root first ring screw distance is too close, then the production process.
7, with iron chromium aluminum as excessive resistivity leads to increase the temperature of the lead wire and the emergence of accident.
In the design, single head heating tube production process, resistance heating pipe size, determines the power of a heater, GB stipulates, electric heating tube power error range and an electric heating pipe resistance error range, the following article I will introduce how to calculate the 1 aluminum heating pipe resistance range value, heating in what resistance within the tube is in conformity with the relevant standards.

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