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:
Aug. 06, 2024
Filed:
Aug. 06, 2021
Applicant:
Rinnai Corporation, Aichi, JP;
Inventor:
Masaru Takeuchi, Aichi, JP;
Assignee:
RINNAI CORPORATION, Aichi, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F23N 1/02 (2006.01); F23N 5/20 (2006.01);
U.S. Cl.
CPC ...
F23N 1/022 (2013.01); F23N 5/203 (2013.01); F23N 2227/02 (2020.01); F23N 2231/12 (2020.01);
Abstract
A controller memorizes an accumulated combustion time by accumulating combustion time of a burner, and is set in a first lower-limit and a second lower-limit higher than the first lower-limit as a lower-limit lower than an initial value of an excess air ratio when reducing an excess air limit of a mixture gas of combustion air and a fuel gas, and the former is the lower-limit in case the accumulated combustion time is under a predetermined set time and the latter is the one in case the accumulated combustion time is the predetermined set time and over.