| 摘要 |
PURPOSE:To provide a hot air heater characterized by quick start-up by installing a heat storage vessel which is filled with latent heat storage material supercooled in a stable state, a means for stopping the supercooling of the heat storage material, an electric heater as a source of heat for heat storage, all in a hot air-circulating duct, and by controlling the electric heater. CONSTITUTION:When an operation switch is pressed, combustion is started at a burner 8 in a combustion chamber 9. It takes time for the combustion to assume a steady state, therefore, simultaneously with the pressing of the operation switch of the hot air heater a supercooling-stopping means 5 is actuated so that the supercooling of latent heat storage material 4 in a heat storage vessel 3 is stopped and the heat stored is released therefrom. When the combustion in the operation of a hot air heater, by which heat is stored in a heat storage vessel 3, is so low that the temperature of the hot air of the latent heat storage material 4 in the heat storage vessel 3 does not reach a point at which a change of phase occurs, an electric heater 6 provided inside the latent heat storage material 4 can be energized simultaneously with the ending of the operation so as to heat the latent heat storage material 4 up to a temperature causing a change of phase. Thus heat can be stored with the latent heat storage material 4 restored certainly to a supercooled state so that quick heating at the start-up is possible at the subsequent use of the hot air heater. |
