| 摘要 |
PURPOSE:To enable a stable air temperature to be obtained at a desired temperature and at the same time to enable an air temperature to be varied in a wide range by a method wherein an air temperature made by a fan is controlled by a temperature variable setting means and the air temperature is sensed by a temperature sensor part and the heater is controlled by a phase control element. CONSTITUTION:A motor 5 having a fan 4, an air temperature control device 6 and a heater 7 are arranged in sequence. A switch 8 for turning off, for changing over a cold air and a hot air, a variable resistor 9, a temperature sensor part 10 having preferred embodiment of a thermistor having a positive temperature characteristics mounted on an heater base plate 11 for supporting the heater 7, a heater piece 12 arranged at an upstream side near the temperature sensor 10 and a power supply code 13 are provided. The temperature variable setting means 28 is composed of a variable resistor 9 and the heater piece 12. When the switch 8 is changed over from its off-position to the cold air position, the air is sucked through the suction port 2, blown out through the discharging port 3. When the switch 8 is changed over to a hot air position, the heater 7 is supplied with electricity to generate the hot air. A stable air temperature can be produced with a set temperature and at the same time the temperature of the air heated by the heater can be varied in a wide range. |
