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电饭煲煮饭为什么会自动调
更新时间: 2020-10-26 00:00:00  

电饭煲内部有限温器,当煮米饭时,锅底的温度不断升高,永久磁环的吸力随温度的升高而减弱,当内锅里的水被蒸发掉,锅底的温度达到103度左右时,磁环的吸力小于其上的弹簧的弹力,限温器被弹簧顶下,带动杠杆开关,切断电源;杠杆开关:煮饭时,按下此开关,给发热管接通电源,同时给加热指示灯供电使之点亮。饭好时,限温器弹下,带动杠杆开关,使触点断开。此后发热管仅受保温开关控制;电饭煲主要由发热盘、限温器、保温开关、杠杆开关、限流电阻、指示灯、插座等组成。

关键词: 电饭煲 煮饭 为什么 自动

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