To provide a refrigerator unit capable of reducing fluctuation of a cold water outlet temperature as much as possible when the number of refrigerators are increased/decreased.

The refrigerator unit includes the refrigerator A and refrigerator B each having an independent refrigerant system. A condenser 8a of the refrigerator A is arranged on the upstream side in the flowing direction of cooling water relative to a condenser 8b of the refrigerator B, and an evaporator 6a of the refrigerator A is arranged on the downstream side of the flowing direction of cold water relative to an evaporator 6b of the refrigerator B. Control is performed so that the cold water outlet temperature TI becomes an intended temperature. A set value TMset of a cold water intermediate temperature TM which is an outlet cold water temperature of the evaporator 6b of the refrigerator B can be changed. By making the cold water intermediate set temperature TMset closer to and approximately equal to the cold water outlet temperature TO, a compressor 1a of the refrigerator A is stopped.