(57) Abstract Topic Two centrifugal compressors (48 and 50) the system and the device which are applied to one evaporator (52) of frozen cooler unit and one condenser (58) are offered. Solutions The condenser (58), is divided into two chambers (62 and 64) as the condenser (58) by the divider (60) which has the same cross section. In the divider, the tube (68) which in the condenser (58) is provided passing, the hole which extends is provided. In order the condenser (58), makes equal and/or to separate internal pressure of husband of both chambers (62 and 64) of the condenser, both chambers (62 and 64) and the fluid the valve which is communicated is included. On the one hand it can operate or the both compressor (48 and 50) according to load. In each centrifugal compressor (48 and 50) becoming independent, condenser pressure it is possible, and hides, can lose the problematical point of the former parallel compressor refrigeration system to add. According to this invention, maximum it can make, furthermore, in combination with, capacity of the frozen cooler to variable load required condition it can adjust.
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