Finned heat exchanger

Abstract

Abstract PURPOSE:To improve the heat transfer performance of the finned heat exchanger by setting the tube pitch of a flat heat transfer tube in a direction rectangular to an airstream direction larger than that in the airstream direction and allowing the long axis of the flat heat transfer tube to have a certain angle with respect to the airstream direction, and providing a plurality of slits opened in the airstream direction on flat fins disposed between the flat heat transfer tube. CONSTITUTION:The tube pitch in a direction rectangular to an airstream direction of a flat heat transfer tube is made larger than that in an airstream direction of a flat heat transfer tube 8, and the long axis of the heat transfer tube is allowed to have a certain angle with respect to an airstream direction 9. Slits 10 opening at two sides opposite to the airstream direction 9 on flat fins 6 between flat heat transfer tubes 8, are provided at the upper and lower parts using flat fins 6 as base plates. By this construction, flow-in is generated in the rear stream of the flat heat transfer tube 8 and the size of a dead water zone 12 is largely reduced. Further, since it becomes possible to suppress the development of a temperature interfacial layer, the front edge effect of the interfacial layer due to the slits 10 is amply displayed on the downstream side of the flat fines 6.

Inventors

• 👤 Shigeo Aoyama
• 👤 繁男 青山
• 👤 Hiroyoshi Tanaka
• 👤 博由 田中
• 👤 Yoshiyuki Tsuda
• 👤 善行 津田
• 👤 Masaaki Adachi
• 👤 安立　正明

Bibliographic Details