This type of refrigerating machines as a rule is designed on the basis of chillers with water-cooled condenser. The unit itself is placed inside and is connected with the outdoor condenser where freon is used in the system. Moreover unlike water-cooled refrigerating devices this type of cooling units does not require the use of intermediate heat-transfer agent in the condenser, thus, there is no need to use power circulating pumps. However the distance between compressor-evaporating unit and condensing unit is limited.