Title:
TURBO REFRIGERATOR AND ITS START CONTROL METHOD
Document Type and Number:
Japanese Patent JP2017215085
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a turbo refrigerator capable of more surely suppressing foaming in an oil tank.SOLUTION: A turbo refrigerator includes a turbo compressor 3 for compressing a refrigerant, a condenser 5 for condensing the refrigerant compressed by the turbo compressor 3, an expansion valve 7 for expanding the liquid refrigerant led from the condenser 5, an evaporator 9 for evaporating the refrigerant expanded by the expansion valve 7, an oil tank 17 for storing a lubricant to be supplied to the turbo compressor 3, a pressure equalizing pipe 23 connecting the oil tank 17 and the evaporator 9, and a control portion for controlling start. The control portion calculates a refrigerant elution amount of the refrigerant dissolved in the lubricant in the oil tank 17 in starting, and reduces a pressure lowering speed in the oil tank 17 by limiting an opening motion of IGV13 when the refrigerant elution amount per a prescribed time is over a prescribed value.SELECTED DRAWING: Figure 1
Inventors:
SUEMITSU RYOSUKE
HASEGAWA HIROSHI
HASEGAWA HIROSHI
Application Number:
JP2016108510A
Publication Date:
December 07, 2017
Filing Date:
May 31, 2016
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD
International Classes:
F25B1/053; F04D27/00; F25B1/00
Attorney, Agent or Firm:
Noriharu Fujita
Miori Takao
Kawakami Miki
Daisuke Nagata
Miori Takao
Kawakami Miki
Daisuke Nagata