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:
Oct. 25, 2005
Filed:
Nov. 25, 2003
Yukihiko Shimonoma, Aichi-ken, JP;
Keiichi Ito, Aichi-ken, JP;
Yoshinori Fujisawa, Aichi-ken, JP;
Yoshimune Yamada, Aichi-ken, JP;
Yukihiko Shimonoma, Aichi-ken, JP;
Keiichi Ito, Aichi-ken, JP;
Yoshinori Fujisawa, Aichi-ken, JP;
Yoshimune Yamada, Aichi-ken, JP;
Rinnai Corporation, Aichi-ken, JP;
Abstract
Providing a hot air heater and an expansion in the air blowing passage of the hot air heater and suppressing increases in air trunk resistance even if electric heaters are arranged in this expansion in a plurality of stages prevents increases in the rotation speed of the air blowing fan in order to obtain a target air flow which in turn causes the operating noise to grow louder. Therefore, an expansionwas formed along the air blowing passageThis expansionhas an entrance openingand an exit openingand functions as a storage portion that contains the electric heatersThe electric heaters are arranged in a plurality of stages in such a manner as to face said entrance opening and a distance between the entrance opening in the expansion and one of the electric heaters that has a highest wind speed at the entrance opening in the expansion of distances between the entrance opening in the expansion and the respective electric heaters is set farther.