| 摘要 |
PURPOSE:To prevent effectively the heat of a humidification heater from traveling to a main body by laying out a hollow pipe equipped with a heater in its outer periphery in a middle part between the side section of an air duct and a main body case. CONSTITUTION:There are installed a motor 13-driven fan 14, an air duct 15 of the fan, a hot air heater 16 in the air duct 15 and an outlet 17 in a main body case 12. A hollow pipe 22 with the heater 16 laid out in the outer periphery is installed in the main body case 12 from the lower part of an air space with the side section of the air duct 15 over the upper part. A water supply tank 25 is installed so as to be communicated with the lower part whereas a humidification port 27 is installed above. A suction port 20 having a filter 19 is installed in the main body case 12 while its part is arranged to project substantially concentrically to the hollow pipe 22. This construction allows the suction air to flow smoothly around the hollow pipe 22 and produces insulation effect of a heater 21 laid out in its outer periphery, thereby inhibiting a rise in the temperature of the surface of the main body case 12. |
