MULTI-BORE TUBE FOR HEAT EXCHANGER, AND TUBE EXPANSION METHOD OF MULTI-BORE TUBE FOR HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To provide a multi-bore tube for a heat exchanger that can prevent reduction in heat exchanger effectiveness by deterring deposits of dust and waterdrops, and a tube expansion method that can easily and reliably expand such a multi-bore tube for a heat exchanger with a small device.;SOLUTION: The heat exchanger multi-bore tube 30 provided with a plurality of internal passages 31 has an oval outline in the tube section.;COPYRIGHT: (C)2005,JPO&NCIPI