机电设备安装中,加温、干燥或熔炼,热源普遍采用镍铬电阻电热器。近年来远红外电热器亦有应用。但由于不同机型或不同施工环节,甚至同一工序中不同部位对电热器的尺寸、容量要求各异,电热器往往需要特制。随着单机容量的增加,部份施工环节电热器一次需用量巨大,施工成本较高,而且镍铬丝电阻器一经通电使用就要变脆,不易 Installation of mechanical and electrical equipment, heating, drying or melting, nickel-chromium resistance heaters commonly used heat source. In recent years far-infrared heater also has applications. However, due to different models or different construction links, or even in the same process in different parts of the heater size, capacity requirements vary, electric heaters often need special. With the increase of stand-alone capacity, part of the construction section of the heater need a huge amount of time, the higher the cost of construction, and the use of nichrome wire resistors should be brittle, not easy