HEAT EXCHANGER FOR HOT WATER SUPPLY

摘要

PROBLEM TO BE SOLVED: To provide a heat exchanger for hot water supply for improving heat efficiency and durability of the heat exchanger (improving dew formation preventing performance and preventing retention of occurring moisture condensed water). SOLUTION: The heat exchanger has a plurality of tiltingly arranged plate-like fins 1. The plate-like fins 1 are provided with a plurality of heat transfer pipes 2 horizontally and vertically tilted with respect to the passing direction of combustion gas, and with a guide plate 10 for changing flow direction of the combustion gas. The heat exchanger has projections 11 for surrounding the upstream side with respect to the passing direction of combustion gas of the heat transfer pipe (upper heat transfer pipe) on the downstream side of the passing direction of combustion gas of the heat transfer pipe, and a notch holes 12 near the heat transfer pipes. The projections are formed by cutting and folding the plate-like fins 1. COPYRIGHT: (C)2004,JPO