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Patent Searching and Data


Title:
METHOD FOR OPERATING SCREW COMPRESSOR AND THE SCREW COMPRESSOR
Document Type and Number:
Japanese Patent JP2001280275
Kind Code:
A
Abstract:

To reduce the generation of a power in the low load region of a screw compressor and to prevent the generation of drain in an oil separator due to repetition of frequent starting and stop.

In control of capacity of the screw compressor driven by an inverter, when a consumption air amount of the compressor is reduced to a value lower than a given amount or a load to a value lower than a given amount, the discharge pressure and the power of the compressor are relieved by switching control, theretofore carried out, of the number of revolutions to other capacity control system, such as closing of a throttle valve situated on the suction side of the compressor.


Inventors:
AOKI MASAKAZU
MATSUDA HIROYUKI
Application Number:
JP2001064314A
Publication Date:
October 10, 2001
Filing Date:
February 18, 1997
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F04C18/16; F04B49/06; F04C28/00; F04C28/06; F04C28/08; F04C28/24; (IPC1-7): F04C18/16; F04B49/06; F04C29/10
Attorney, Agent or Firm:
Sakuta Yasuo