| 摘要 |
PURPOSE:To set the amount of airflow so as to obtain the arriving distance of downward airstream necessary and sufficient for mixing indoor air at all times by a method wherein the airflow amount ratio of blow-off air, distributed in accordance with the change of the temperature of the blow-off air generated upon the ON-OFF operation or the variable capacity operation of the device, is changed. CONSTITUTION:The device is provided with a thermistor 6 as a blow-off temperature detecting means, a damper 5 as a blow-off airstream distributing means, distributing the blow-off airstream into a plurality of directions and setting the airflow amount ratio for respective directions, a step motor 7 as a control unit, varying the airflow amount ratio of the damper 5 based on the output of the thermistor 6, and a step motor control circuit. According to this method, the airflow amount ratio of the distributed airstreams in accordance with the change of the blow-off temperature generated upon the ON-OFF or capacity control is changed to set the flow amount of downblow airstream so as to obtain the arriving distance of the same airstream necessary and sufficient for mixing the indor air at all times. In this case, when the blow-off temperature is risen, the arriving distance is shortened, therefore, the flow amount ratio of the downblow airstream is increased and, on the contrary, when the blow-off temperature is lowered, the flow amount ratio of the downblow airstream is reduced. |
