The entrance of refrigerant into the evaporator is controlled by a valve or an orifice.
进入蒸发器的制冷剂由一个阀或量孔控制。
The opening degree of the thermo-mechanic expanding valve is controlled by the over-heating degree of the refrigerant at the outlet of the evaporator.
热力膨胀阀的开度受控于蒸发器出口的制冷剂过热度，通过开度的调节，达到调节蒸发压力和控制制冷剂过热度的作用；
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