The refrigerant mu zozizira mafakitale amadutsa magawo anayi: evaporation, compression, condensation, ndi kufutukuka. Imayamwa kutentha mu evaporator, imapanikizidwa ku kuthamanga kwambiri, imatulutsa kutentha mu condenser, ndiyeno imatambasula, kuyambitsanso kuzungulira. Njira yabwinoyi imatsimikizira kuziziritsa koyenera kwa ntchito zosiyanasiyana zamakampani.