| 摘要 |
PROBLEM TO BE SOLVED: To prevent a decrease in a thermal efficiency of a heat exchanger for recovering a latent heat. SOLUTION: A drain receiver 16 for receiving water droplets (drain) dropped from a heat exchanger 13 is arranged under the exchanger 13 for recovering a latent heat. The receiver 16 includes a plurality of plate members 36a, 36b in a multiple structure obtained by superposing them through an air layer 37. The receiver 16 is formed in the multiple structure to transfer the heat of exhaust gas flowing along a bottom of the receiver 16 to an upper surface of the receiver 16 to prevent the heat from being absorbed to the droplet of the upper surface. As a result, the heat of the gas is absorbed to the droplet on the receiver 16 before flowing to the exchanger 13 for recovering the latent heat, thereby preventing a problem of lowering the thermal efficiency of the exchanger 13 for recovering the latent heat. |
