Title:
LIQUID-SUPPLY-TYPE SCREW COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2024/038656
Kind Code:
A1
Abstract:
In this liquid-supply-type screw compressor, a driving mechanism slidably drives a valve body by means of: a first biasing force due to an elastic force of an elastic body in a direction from a first valve body position to a third valve body position; and a second biasing force due to the discharge pressure of a discharge gas in a direction from the third valve body position to the first valve body position. The driving mechanism: slidably drives the valve body to the third valve body position when a discharge pressure is no greater than a first discharge pressure where a cooling liquid pressure is a first pressure, and is greater than a second discharge pressure where the cooling liquid pressure is a second pressure; slidably drives the valve body to a second valve body position when the discharge pressure is greater than the first discharge pressure and smaller than a predetermined pressure greater than the first discharge pressure; and slidably drives the valve body to the first valve body position when the discharge pressure is at least the predetermined pressure.
Inventors:
YORIKANE SHIGEYUKI (JP)
YAMAMOTO KENTARO (JP)
YAMAMOTO KENTARO (JP)
Application Number:
PCT/JP2023/020259
Publication Date:
February 22, 2024
Filing Date:
May 31, 2023
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
F04C18/16; F04C29/02; F04C29/04
Foreign References:
| US20120207634A1 | 2012-08-16 | |||
| JP2018021494A | 2018-02-08 |
Attorney, Agent or Firm:
SUNNEXT INTERNATIONAL PATENT OFFICE (JP)
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