PURPOSE: To prevent over-dehumidifying without causing the deterioration of performance of the device due to the fluctuation of the load of dehumidifying and reduce operating cost by a method wherein an automatic control, such as a plural positional control, a proportional control or the like, of the supplying amount of fuel is effected in the humidifier reproducing dehumidifying body.
CONSTITUTION: A fuel supplying path 7 for a burner 1 is provided with a bypass 9 and both of them are interposed with solenoid valves 10, 11 respectively. The solenoid valves 10, 11 are connected to the output side of a humidity control circuit 12 while the input side of the circuit is connected to a humidity sensor 13 at the downstream side of the dehumidifying body 4 in an air-conditioning path 3. The humidity sensor 13 detects the temperature of processing air (a) passed through the dehumidifying body 4 and inputs the detected value into the humidity control circuit 12 to compare it with a set value and effect respective opening and closing controls of the solenoid valves 10, 11. The supplying amount of the fuel, passing through the solenoid valve 10, is automatically controlled so as to obtain a reproducing temperature of 150°C under low combustion in case molecular sieves are utilized as the humidity absorbing adsorbent for the dehumidifying body 4 while it is controlled automatically so as not to decrease the temperature to the same lower than 100°C when a gel is utilized as the same adsorbent.
YAMASHITA KIYOSHI
SAGOU YOSHIHARU
