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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/111661
Kind Code:
This liquid-feeding screw compressor is provided with: a casing that accommodates a screw rotor and a bearing, and that has an air intake and an intake chamber connected to the air intake; an intake throttle valve that is installed at the air intake, and that has a housing; and an intake air bypass system communicating between a primary side and a secondary side of the intake throttle valve. The intake air bypass system comprises: an intake air bypass channel that is provided to a wall section of the housing and comprises a primary-side opening that opens to a primary side of the intake throttle valve and a secondary-side opening that opens to a secondary side; and a first check valve arranged within the intake air bypass channel. The intake air bypass channel has an external opening that opens to the exterior of the housing, and allows for insertion and withdrawal of the first check valve. Due to this configuration, it is possible to make a system that communicates with an intake chamber in a casing and that is provided with a check valve mechanism into a pipeless structure, without compromising on the advantages of an external tubing.

TAKANO Masahiko (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
YORIKANE Shigeyuki (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
Application Number:
Publication Date:
June 13, 2019
Filing Date:
November 14, 2018
Export Citation:
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HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD. (3 Kanda Neribei-cho, Chiyoda-ku Tokyo, 22, 〒1010022, JP)
International Classes:
F04C29/12; F04C18/16; F04C29/02
Foreign References:
Attorney, Agent or Firm:
KAICHI IP (3-16, Nihonbashi-muromachi 4-chome Chuo-k, Tokyo 22, 〒1030022, JP)
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