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双金属片温度计

2020-11-26

JVTIA

207

球温度计有益于准确测量温度,但是它们更难使用时的目标是控制温度。双金属片温度计,因为它是金属做的,善于控制事物。双金属片温度计的原理依赖于这样一个事实:不同的金属扩大热身时以不同的速率。通过结合两种不同的金属在一起,您可以做一个简单的电动控制器,可以承受较高的温度。这类控制器经常在烤箱中被发现。这是总体布局:两种金属组成双金属片( 因此,名称) 。在这个图中,绿色的金属会选择扩展速度比蓝色的金属如果设备被用于烤箱。在冰箱中,您将使用相反的设置,因此,随着温度的升高的蓝色金属膨胀速度比绿色。这导致带钢弯曲向上,接触电流可以流。通过调整带之间的差距的大小和接触,你控制温度。你会经常发现长双金属条盘成螺旋状。这是典型的布局的后院表盘式温度表。通过卷很长带小温度变化变得更加敏感。炉恒温器,使用相同的技术和水银开关连接到线圈。开关开启和关闭炉。

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