| 摘要 |
According to the present invention, a configuration of a hot water heat exchanger comprises: a heat exchanging plate set (19) having an inner direct water flow passage and a heating water flow passage (WP); a coupling groove unit (18) where a bottom surface of a flow passage groove unit (17) of a heating plate (15) is coupled; a special plate (14SP) coupled to the heat exchanging plate set (19); a plurality of heat transfer beads (16) having a plurality of special flow passage groove units (14GP); a special groove unit (14SG) provide to have a groove shape recesses at a predetermined depth from an upper surface of the heat transfer bead (16); and a reinforcement plate (22) having a direct water hole, a hot water hole, and a heating water introduction hole of the special plate (14SP), and a direction water inlet (10), a hot water outlet (11), a heating water inlet, and a heating water outlet. |
