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...):
1 MSM is a water soluble white crystalline powder which blends easily with any mixture. 2  MSM is odorless and non-allergenic. 3  MSM has no known toxicity assuring safe use and handling. 4  MSM is patented and licensed material which provides assurance of its value in the nutritional and cosmetic industries.SM is a snow white, crystalline, water soluble, odorless and almost tasteless powder. It is neither a drug or food additive but what could be termed 'a nutritional mineral', such as sodium or sulphur required by the body for life processes.