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:
Apr. 28, 2009
Filed:
May. 10, 2005
Tetsurou Hamada, Hyogo, JP;
Hitoshi Hara, Hyogo, JP;
Hideaki Yoshitomi, Hyogo, JP;
Kozo Uehara, Hyogo, JP;
Hiroaki Takashima, Hyogo, JP;
Tetsurou Hamada, Hyogo, JP;
Hitoshi Hara, Hyogo, JP;
Hideaki Yoshitomi, Hyogo, JP;
Kozo Uehara, Hyogo, JP;
Hiroaki Takashima, Hyogo, JP;
Noritz Corporation, Hyogo, JP;
Abstract
A heat exchanger Aincludes a partitionpartitioning the spacesurrounded by a coiled tubeat an axially intermediate portion of a housinginto a first and a second regionsandand partitioning the coiled tubeinto a first and a second heat exchanging portions HTand HT. The combustion gas supplied to the first regionflows to a combustion gas pathby passing through a clearanceof the first heat exchanging portion HTand then passes through a clearanceof the second heat exchanging portion HT. With this structure, the amount of heat recovery is increased, and the heat exchange efficiency is enhanced while simplifying the overall structure of the heat exchanger Aand reducing the size of the heat exchanger.