The liquid refrigerant entering the evaporator from the refrigerant flow control is suddenly under low-pressure. This makes it vaporize (boil) and absorb heat. The vapor move on into the suction line. If all of the liquid refrigerant has not vaporized in the evaporator, there is usualy a cylinder (accumulator) to prevent liquid refrigerant from flowing into the suction line.
Source :
" Modern Refrigeration and air conditioning " by Andrew D. Carl. H, Alfred F.
