| 摘要 |
<p>PURPOSE:To improve thermal efficiency and heat recovery rate of a water heating apparatus for a bath, by arranging many thin pipes in a zigzag pattern in a hot water tank, and providing a float lid having heat insulating and waterproof property so that the lid is floated and moved in response to the up and down change of the surface of the hot water in the tank. CONSTITUTION:Many thin pipe groups 2 are arranged in a zigzag pattern in a hot water tank 1. Both ends of the thin valve group 2 are connected to a distributing tank 3 and a collecting tank 4. A float lid 8 is constituted by a member having excellent heat insulating and waterproof property, and provided in such a way that it is floated and moved in response to the up and down movement of the surface of the hot water in the tank. Therefore, the heat exchange efficiency of the hot drained water and the cool water is improved. Since the heat dissipation from the surface of the hot water in the tank is prevented, the heat recovery rate can be improved.</p> |
