冷水机组与冷冻机组主要由以下几大部件组成：
蒸发器 evaporator
冷凝器 condensing apparatus, condenser
压缩机 compressor ,compression machine
膨胀阀 expansion valve
油分 oil dispenser oil separator
引射器 ejector
蒸发面积 evaporator area
蒸发式冷凝器 evaporator condenser
冷冻水 chilled water
冷吨 ton of refrigeration
冷量损失 loss of refrigeration capacity
膨胀阀过热度 expansion valve superheat
冷冻机 freezing machine
冷冻厂 refrigerating plant