AIR CONDITIONING DEVICE

PURPOSE:To improve the temperature control performance of an air conditioning device by a method wherein the temperature value of an indoor temperature sensor is corrected with the temperature value of a return air temperature sensor. CONSTITUTION:The indoor air sucked from a sitting room 9 through a suction passage 10 is cooled or heated by a cooling-heating unit 11 and then supplied by means of a fan 12 to the sitting room 9 through a discharge passage 13 in a form of cold air or hot air. In addition, the cooling-heating rate control valve 17 of the cooling-heating unit 11 is controlled in response to the deviation between the temperature value of a return air temperature sensor 16, the high speed air flowing around which produces a high sensitivity, and the desired value for controlling, which is formed by adding the difference between the indoor temperature value and the return air temperature value for the correction to a set indoor temperature value 15, in order to keep the return air temperature at said desired value for controlling, resulting in keeping the indoor temperature at the set indoor temperature value.