Title:
OIL PUMP CONTROL DEVICE, CONTROL METHOD, CONTROL PROGRAM, AND TURBO REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO/2019/123924
Kind Code:
A1
Abstract:
In order to reduce the effect of foaming occurring in an oil tank on a compressor, an oil pump control unit (50) is applied to a turbo refrigerator comprising an oil tank that stores lubrication oil supplied to a compressor and a variable-speed oil pump that supplies the lubricating oil in the oil tank to the compressor. The oil pump control unit (50) comprises: an intake refrigerant gas amount calculation unit (52) for calculating the amount of refrigerant gas drawn into the oil pump, as an intake refrigerant gas amount; a supplied lubricating oil amount calculation unit (53) for using the intake refrigerant gas amount and a required lubricating oil amount, which is an amount of lubricating oil required by the compressor, to calculate a supplied lubricating oil amount; and a command value generation unit (54) for generating a rotation speed command value for the oil pump on the basis of the supplied lubricating oil amount.
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Inventors:
TOGANO YOSHIE (JP)
UEDA KENJI (JP)
HASEGAWA YASUSHI (JP)
UEDA KENJI (JP)
HASEGAWA YASUSHI (JP)
Application Number:
PCT/JP2018/042414
Publication Date:
June 27, 2019
Filing Date:
November 16, 2018
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B1/053; F04D27/00; F25B43/02
Foreign References:
| JP2016160774A | 2016-09-05 | |||
| JP2001099070A | 2001-04-10 | |||
| JP2017215085A | 2017-12-07 |
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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