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:
Jan. 05, 2016
Filed:
Oct. 07, 2013
Rinnai Corporation, Nagoya-shi, Aichi, JP;
Masakazu Ando, Nagoya, JP;
RINNAI CORPORATION, Nagoya-Shi, JP;
Abstract
A circulating-type hot-water supply device () is provided with a heat exchanger abnormality determining unit (), which inhibits execution of a suitable temperature maintaining operation when the suitable temperature maintaining operation continued for a predetermined time or more and stops a circulating pump (), and when a temperature rise range of a detected temperature of a heat exchanger outlet temperature sensor () after stopping the circulating pump () becomes equal to or more than a temperature rise threshold value determined according to a selected state of burner blocks (),() in a combusted state immediately before stopping the circulating pump (), determines that a heat exchanger is in an abnormal state.