| 摘要 |
<p>A system control circuit 40 is provided with a table storing portion 40a. In the table storing portion 40a, a table for a positioned-on-a-floor mode and a hung-from-a-ceiling mode, a table for upwardly-positioned, and a table for downwardly-positioned are stored. On each table, temperature of outside air and voltage supplied to each fan power supply are corresponded. In receipt of information indicating a positioned-on-a-floor state (angle = zero degrees) from a attitude detection sensor 47, the system control circuit 40 selects the table for a positioned-on-a-floor mode and a hung-from-a-ceiling mode. In addition, the system control circuit 40 obtains measured temperature data from a temperature sensor 49, and applies this measured temperature data to the selection table as a read-out address.
As a result, voltage values regarding each fan power supply are read out from the selection table. The system control circuit 40 instructs each fan power supply to drive the fans based on the read-out voltage values.</p> |
