| 摘要 |
<p>PURPOSE:To provide a water heater, in which no deposition of scale from heat transfer fluid occurs and no oxygen dissolved in the heat transfer fluid corrodes a heating vessel, by a method wherein heat transfer is performed through the vacuum-sealed heat transfer fluid. CONSTITUTION:A determined amount of heat transfer fluid 1 is injected in a closed vessel 2, the air in which is evacuated by means of a vacuum pump in order to vacuum-seal the heat transfer fluid 1. An electric heater 3 to heat the heat transfer fluid 1 is arranged in the heat transfer fluid 1 space of the closed vessel 2. A heat exchanger 4 for service hot water or for heating is arranged in the vapor space of the heat transfer fluid formed by the heating of the electric heater 3 in order to heat water by heat-exchanging with the heat stored by the vapor. Thus, the heat transfer to the water for hot water supply or for heating is performed by repeating the phase change of the heat transfer fluid between fluid and vapor.</p> |
