The refrigerant flows through the coils on the back or under the freezer and through an expansion valve to the inside of the freezer. As the refrigerant passes through the expansion valve the pressure drops and hence the temperature also drops.
The noun MM has 1 sense: 1  1. a metric unit of length equal to one thousandth of a meter. 2  Meaning: 3  A metric unit of length equal to one thousandth of a meter. 4  Classified under: 5  Nouns denoting quantities and units of measure. 6  Synonyms: 7  millimeter; millimetre; mm. 8  Hypernyms (mm is a kind of...):
Convert millimeters to microns. (mm to Âµm) The millimeter (British spelling: millimetre, abbreviation and symbol: mm) is a unit of length in the SI system (metric system). One mm is equal to one thousandth of the meter (British spelling: metre), which is the current SI (Metric system) base unit of length.