HEAT EXCHANGER OF CONDENSING BOILER

摘要

PURPOSE: A heat exchanger of condensing boiler is provided to reduce heat loss occurring on a connecting part of a heat exchange pipe. CONSTITUTION: Heat exchange pipes(300) are arranged in a plurality of rows parallel to each other so that one ends of the heat exchange pipes symmetrical to each other are connected to be U-shaped in a heat exchanger(100). A cap(500) has a passage guide space(510) forming connecting passages between the neighboring heat exchange pipes to form a single passage for hot water flowing in the heat exchange pipes, a hot water inlet(520) and a hot water outlet(530), and is joined to opening ends of the heat exchange pipes.