单项选择题
A.detect the temperature B.detect the pressure C.heat the refrigerant D.accelerate the refrigerant
The expansion valve on a Freon system controls the （）.A...
单项选择题The expansion valve on a Freon system controls the （）.
A.superheat of the gas leaving the compressor B.back pressure in the evaporator C.temperature of the icebox D.superheat of the gas leaving the evaporator
During working, thermostatic expansion valve should be ...
单项选择题During working, thermostatic expansion valve should be （）.
A.either all the way open or all the way closed B.normally fully open C.throttled depending on load D.controlled by liquefied pressure
When the temperature of the refrigerant flowing out fro...
单项选择题When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.
A.dry B.wet C.super-cooled D.superheated
