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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9664200 B1

PDFFull Text
Date of Patent:
May. 30, 2017

Filed:

Feb. 20, 2015

Turbo compressor and turbo refrigerator

Applicant:

Ihi Corporation, Tokyo, JP;

Inventors:

Kentarou Oda, Tokyo, JP;

Seiichiro Yoshinaga, Tokyo, JP;

Kazuaki Kurihara, Tokyo, JP;

Nobuyoshi Sakuma, Tokyo, JP;

Assignee:

DAIKIN INDUSTRIES, LTD., , JP;

Attorney:

Ostrolenk Faber LLP

Primary Examiner:

Mohammad M Ali

Int. Cl.
CPC ...
F04D 29/06 (2006.01); F25B 43/02 (2006.01); F04D 17/10 (2006.01); F04D 29/063 (2006.01); F04D 29/46 (2006.01); F04D 17/12 (2006.01); F04D 25/02 (2006.01); F04D 29/42 (2006.01); F25B 1/053 (2006.01); F25B 31/00 (2006.01); F25B 1/10 (2006.01); F25B 25/00 (2006.01); F25B 31/02 (2006.01);
U.S. Cl.
CPC ...
F04D 29/061 (2013.01); F04D 17/10 (2013.01); F04D 17/12 (2013.01); F04D 25/02 (2013.01); F04D 29/063 (2013.01); F04D 29/4213 (2013.01); F04D 29/462 (2013.01); F25B 1/053 (2013.01); F25B 43/02 (2013.01); F05D 2250/51 (2013.01); F05D 2260/609 (2013.01); F25B 1/10 (2013.01); F25B 25/005 (2013.01); F25B 31/004 (2013.01); F25B 31/008 (2013.01); F25B 31/026 (2013.01); F25B 2339/047 (2013.01); F25B 2341/0662 (2013.01); F25B 2400/13 (2013.01); F25B 2400/23 (2013.01);
Abstract

A turbo compressor that has a compression stage provided with an impeller that rotates; a housing provided with a gear unit accommodation space that accommodates lubricating oil and accommodates a large diameter gear that transmits rotating force to the impeller, an IGV accommodation space in which the ambient pressure is lower than the gear unit accommodation space, and a gap that brings the IGV accommodation space and the air intake side of a first compression stage into communication; a pressure equalizing tube that causes a gas to circulate from the gear unit accommodation space toward the IGV accommodation space; and a second oil separating device that separates, in the IGV accommodation space, the lubricating oil contained in the gas.

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