| 摘要 |
PURPOSE:To improve living comfort by a method wherein, in a hot air heater equipped with an upper and a lower wind tunnel for heating incorporated with two heat sources, an upper blown-off hot air temperature is set to a value lower than that of a lower blown-off hot air temperature. CONSTITUTION:A high-temperature heat exchanger 12, mounted to an upper wind tunnel B' for heating, is set to temperature slightly lower than that of a high temperature heat exchanger 11 mounted to a lower wind tunnel A' for heating. During the initial stage of heating operation, the heat exchangers 11 and 12 are simultaneously operated, louvers 13 and 14 are set so that an upper and a lower hot air supply outlets 5 and 6 are positioned pointing to a floor surface and a hot air is blown off in a manner of two layers of an upper and a lower layer at the same angle. This causes a lower layer hot air 5 shown in a solid line to cover an upper layer hot air 6 shown in a dotted line, and enables prevention of rising of the lower layer hot air 5. Further, this enables the hot air to flow throughout to a far place along a floor surface 9, resulting in the possibility to improve living comfort. |
