HEAT EXCHANGER, REFRIGERATING AIR CONDITIONER AND MANUFACTURING METHOD OF HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To resolve a problem that a conventional heat exchanger employing a circular tube or a flat tube does not permit to improve remarkably a ventilating resistance or a heat transfer performance and contrive energy saving due to the restriction in manufacturing or structure. SOLUTION: A multitude of sheet type fins are arranged in parallel and flat type heat transfer tubes are inserted from the upstream side of air flow into groove holes to braze the tube to the fin whereby the heat exchanger, miniaturized in size, reduced in a ventilating resistance and excellent in heat transfer performance can be obtained.