题干

小明的妈妈为了改善早餐的营养,买了一台全自动豆浆机,如图甲所示.图乙所示是豆浆机的主要结构:中间部位是一个带动刀头的电动机,用来将原料进行粉碎打浆;外部是一个金属圆环形状的电热管,负责对液体加热煮沸.下表是这个豆浆机的主要技术参数;图丙所示是豆浆机正常工作做一次豆浆的部分过程中电热管和电动机交替工作的“P﹣t”图象.

型 号

SYL﹣624

额定电压

220V

额定频率

50Hz

电机功率

120W

加热功率

1210W

容量

1000mL

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