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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 10113553 B1

PDFFull Text
Date of Patent:
Oct. 30, 2018

Filed:

Jan. 12, 2016

Centrifugal compressor with hot gas injection

Applicant:

Daikin Applied Americas Inc., Minneapolis, MN (US);

Inventors:

Nobuhiro Umeda, Plymouth, MN (US);

Md Anwar Hossain, Maple Grove, MN (US);

Takatoshi Takigawa, St. Louis Park, MN (US);

Assignee:

DAIKIN APPLIED AMERICAS INC., Minneapolis, MN (US);

Attorney:

Global IP Counselors, LLP

Primary Examiner:

Ninh H Nguyen

Int. Cl.
CPC ...
F04D 29/048 (2006.01); F04D 27/02 (2006.01); F25B 49/02 (2006.01); F04D 17/10 (2006.01); F04D 25/02 (2006.01); F04D 27/00 (2006.01); F04D 29/058 (2006.01); F04D 29/28 (2006.01); F04D 29/42 (2006.01); F04D 29/44 (2006.01); F04D 29/58 (2006.01); F25B 1/053 (2006.01); F25B 41/06 (2006.01); F04D 17/12 (2006.01); F25B 25/00 (2006.01); F25B 31/00 (2006.01);
U.S. Cl.
CPC ...
F04D 27/0238 (2013.01); F04D 17/10 (2013.01); F04D 17/12 (2013.01); F04D 25/02 (2013.01); F04D 27/001 (2013.01); F04D 29/048 (2013.01); F04D 29/058 (2013.01); F04D 29/284 (2013.01); F04D 29/4206 (2013.01); F04D 29/444 (2013.01); F04D 29/582 (2013.01); F25B 1/053 (2013.01); F25B 41/062 (2013.01); F25B 49/022 (2013.01); F25B 49/027 (2013.01); F05D 2240/51 (2013.01); F05D 2270/101 (2013.01); F25B 25/005 (2013.01); F25B 31/008 (2013.01); F25B 2339/047 (2013.01); F25B 2341/0653 (2013.01); F25B 2341/0661 (2013.01); F25B 2600/0261 (2013.01); F25B 2600/2501 (2013.01); F25B 2600/2513 (2013.01); F25B 2700/21161 (2013.01); F25B 2700/21171 (2013.01); F25B 2700/21173 (2013.01);
Abstract

A centrifugal compressor for a chiller includes a casing, an inlet guide vane, an impeller downstream of the inlet guide vane, a motor and a diffuser. The casing has inlet and outlet portions with the inlet guide vane disposed in the inlet portion. The impeller is rotatable about a rotation axis defining an axial direction. The motor rotates the impeller. The diffuser is disposed in the outlet portion downstream from the impeller with an outlet port of the outlet portion being disposed between the impeller and the diffuser. A hot gas injection passage is provided to inject hot gas refrigerant between the inlet guide vane and the impeller. A controller is programmed to control an amount of the hot gas refrigerant.

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