| 塑料机械电磁加热器 |
| 添加时间：2018/8/31 15:27:54 浏览次数： |
| 电阻式加热弊端 Disadvantages of resistance heating 1、是由电阻丝绕制，圈的内外双面发热，其内面（紧贴料筒部分） 的热传导到料筒上，而外面的热量大部分散失到空气中，造成电能的直接损失、浪费。 1. It is winded by resistance wire. The inner and outer sides of the coil are heated. The inner side (the part close to the barrel) of the coil conducts heat to the barrel, while the outside heat is mostly dissipated into the air, resulting in direct loss and waste of electric energy. 2、由于热量大量散失，周围环境温度升高，尤其是夏天对生产环境影响很大，现场工作温度有的已经超过了45度，有些企业不得不采用空调降低温度，这又造成能源的二次浪费。 2. Because of the heat loss, the ambient temperature rises, especially in summer, which has a great impact on the production environment. Some of the field working temperature has exceeded 45 degrees. Some enterprises have to adopt air conditioning to reduce the temperature, which causes the secondary waste of energy. 3、电热管由于采用电阻丝发热，其加热温度高达300度左右，热滞后较大，不易精确控温，电阻丝容易因高温老化而烧断。常用电热圈使用寿命约半年，因此，维修的工作量相对较大。 3. Electric heat pipe is heated by resistance wire, its heating temperature is as high as 300 degrees, thermal lag is large, it is difficult to accurately control temperature, resistance wire is easy to burn because of high temperature aging. The service life of commonly used electric heating ring is about half a year, so the workload of maintenance is relatively large. |
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