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.:
Date of Patent:
Jun. 15, 2021
Filed:
Mar. 09, 2018
Applicant:
Daikin Industries, Ltd., Osaka, JP;
Inventors:
Azumi Kojima, Osaka, JP;
Takashi Kashihara, Osaka, JP;
Assignee:
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/44 (2006.01); F04D 25/08 (2006.01); F04D 29/30 (2006.01);
U.S. Cl.
CPC ...
F04D 29/444 (2013.01); F04D 25/08 (2013.01); F04D 29/30 (2013.01); F05D 2250/51 (2013.01);
Abstract
A double-suction centrifugal fan includes: a first impeller coupled to a shaft; a second impeller provided with a second inlet port opened opposite to an electric motor and coupled to the shaft at a position farther from the electric motor than the first impeller; a first bell mouth connected to a first inlet port of the first impeller, and a second bell mouth connected to the second inlet port of the second impeller. An axial length Lof the second bell mouth is greater than an axial length Lof the first bell mouth.