TURBO REFRIGERATOR, COMPRESSOR THEREOF, AND CONTROL METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a compressor for a turbo refrigerator capable of stably and efficiently operating under each operation condition.

SOLUTION: An aerodynamic characteristic map 42 having a turning stalling line on which turning stalling occurs drawn on a map indicated by a flow rate variable θ reflecting flow rate based on output heat quantity of the refrigerator and a pressure variable Ω reflecting head based on evaporator pressure Pe and condenser pressure Pc is provided. The minimum rotation speed is obtained by the pressure variable Ω under the current operation condition and the turning stalling line on the aerodynamic characteristic map 42, and rotation speed of the minimum rotation speed obtained by the minimum rotation speed acquisition part or greater is directed to an inverter.

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