| 摘要 |
PURPOSE:To prevent the amount of humidification from being reduced when the conditions are switched and transferred and hereby create an amenity space intended to suit user's convenience by keeping both heating means energyzed during a predetermined transfer interval when upon switching the humidifying conditions the conditions are transferred from original humidifying conditions to the next humidifying conditions. CONSTITUTION:Upon switching heating conditions of humidifying apparatuses 2, 3 of a water vapor heating system capable of selecting at least large and small two level or more of the humidifying conditions, original heating means and the next heating means are together kept energyzed during a predetermined transfer interval. Thereby, even in the transfer interval the amount of humidification is prevented from being reduced whereby a humidification capability is prevented from being lowered to ensure the achievement of a continuous change in the humidification conditions. Concretely, between humidification heaters 9, 10 the one humidification heater on the side where power supply is interrupted is delayed in its power supply interruption until the other humidification heater on the side where power supply is started is substantially build up in its water vapor production whereby the humidification operation is continued without interruption.
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