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Patent Searching and Data


Title:
TURBO FREEZING MACHINE AND START-UP CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/208685
Kind Code:
A1
Abstract:
The present invention is provided with: a turbo compressor (3) that compresses a refrigerant; a condenser (5) that condenses the refrigerant compressed by the turbo compressor (3); an expansion valve (7) that expands a liquid refrigerant introduced from the condenser (5); an evaporator (9) that evaporates the refrigerant expanded by the expansion valve (7); an oil tank (17) that stores a lubricating oil supplied to the turbo compressor (3); a pressure equalizing pipe (23) that connects the oil tank (17) and the evaporator (9); and a control unit that controls start-up. The control unit calculates the amount of a refrigerant eluded into the lubricating oil in the oil tank (17) at the time of start-up, and reduces a pressure reduction speed in the oil tank (17) by limiting the opening operation of an IGV (13) when the refrigerant elution amount per prescribed time exceeds a prescribed value.

Inventors:
SUEMITSU, Ryosuke (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
HASEGAWA, Yasushi (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
Application Number:
JP2017/016403
Publication Date:
December 07, 2017
Filing Date:
April 25, 2017
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. (16-5, Konan 2-Chome Minato-k, Tokyo 15, 〒1088215, JP)
International Classes:
F25B1/053; F04D27/00; F25B1/00
Attorney, Agent or Firm:
FUJITA, Takaharu (37F The Landmark Tower Yokohama, 2-2-1 Minatomirai, Nishi-ku, Yokohama-sh, Kanagawa 37, 〒2208137, JP)
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