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:
Nov. 01, 1994
Filed:
Dec. 08, 1992
Takeo Tanaka, Ibaraki, JP;
Toshio Hatada, Tsuchiura, JP;
Masaaki Itoh, Tsuchiura, JP;
Takao Senshu, Shizuoka, JP;
Naoto Katsumata, Shimizu, JP;
Yoshihiko Mochizuki, Shizuoka, JP;
Hirokiyo Terada, Shizuoka, JP;
Minetoshi Izushi, Shimizu, JP;
Minoru Sato, Shimizu, JP;
Hiromi Tsuji, Shizuoka, JP;
Makoto Nagai, Yaizu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fin-tube type heat exchanger has parallel heat transfer tubes and a stack of a plurality of plate fins mounted on the tubes. Heat exchange is conducted between a first fluid flowing through the tubes and a second fluid flowing through the stack across each of the fins. Each fin has flat tube-mounting portions spaced in the longitudinal direction of the fin and formed with tube-mounting holes and a louver section disposed between each adjacent pair of tube-mounting portions. The louver section has elongated slats extending longitudinally of the fin and having side edges each spaced from an adjacent side edge of an adjacent slat. The slats are classified into two groups in respect of the cross-sectional shape. The slats of one group have generally flat cross-sections to reduce the resistance of the fin to the flow of the second fluid through the stack and are disposed in planes offset from the plane of the tube-mounting portions. The slats of the other group have V-shaped or inverted V-shaped cross-sections to increase stiffness of the fin in the longitudinal direction thereof.