Wuhu Hengxin New Material Technology Co., Ltd
Contact:Mr Dai
Phone: 13955309088
Address: 13955309088@163.com
Address: Yinfeng Industrial Park, North Side of Weiyi Road, Wanchun Street, Economic and Technological Development Zone, Wuhu City, Anhui Province
The difference between self controlled temperature electric heating belt and constant power electric
自控温电热带和恒功率电热带的区别
自控温电伴热方案主要通过自控温电伴热线完成。自控温电伴热线由导电塑料和2根平行母线加绝缘层、金属屏蔽网、防腐外套构成。其中由塑料加导电碳粒经特殊加工而成的导电塑料是发热核心。当伴热线周围温度较低时,导电塑料产生微分子收缩,碳粒连接形成电路使电流通过,伴热线便开始发热;而温度较高时,导电塑料产生微分子膨胀,碳粒逐渐分开,导致电路中断,电阻上升,伴热线自动减少功率输出,发热量便降低。当周围温度变冷时,塑料又恢复到微分子收缩状态,碳粒相应连接起来形成电路,伴热线发热功率又自动上升,这就是我们常说的电阻正温度系数(PTC)特性。其整个温度控制过程是由材料本身自动调节完成的,其控制温度不会过高也不会过低。

恒功率电热带分为并联式电热带和串联式电热带。 恒功率电热带由于其多个发热节在整个长度并联联接,故简称为并联式电热带,它是由电源母线和母线绝缘、主绝缘、发热丝、外护套、金属屏蔽网、加强护套构成。恒功率并联电热带由于其多个发热节在整个长度并联联接。电源母线为二根或三根平行绝缘铜导线,并在其表面上缠绕电热丝,并将该电热丝每隔一定距离(“即发热节长”)与母线连接,形成连续并联电阻,母线通电后,各并联电阻发热,因而形成一条连续的加热带,其发热核心为电热丝。 恒功率串联电热带由电源母线、复合绝缘、外护套、铜编织、加强层构成。根据焦耳定律可知,电流通过导体不断的放出能量,形成一条连续的、发热均匀的电伴热带。其发热核心就是母线。
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