REFRIGERATION MACHINE CONTROL DEVICE, TURBO REFRIGERATION MACHINE, REFRIGERATION MACHINE CONTROL METHOD, AND PROGRAM
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United States of America
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Issued Date -
Apr 15, 2021
app pub date -
Mar 8, 2018
filing date -
Mar 8, 2018
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Abstract
A refrigeration machine control device according to an embodiment of the present invention serves to control a turbo refrigeration machine and is equipped with a pressure reduction rate identification unit for identifying a pressure reduction rate at which foaming does not occur in an oil tank, and a pressure adjustment unit for adjusting the pressure of an evaporator on the basis of the identified pressure reduction rate. The pressure reduction rate identification unit is equipped with: a refrigerant precipitation gas volume calculation unit for calculating the volume of refrigerant gas precipitated from lubricating oil when the pressure is reduced at a prescribed pressure reduction rate; and a determination unit for determining whether or not foaming is permissible on the basis of a comparison between the calculated volume and the volume on the surface of the oil in the oil tank.
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