| 摘要 |
PURPOSE: To keep indoor air in comfortable state by the complementary driving of a ventilation fan and a cooling/heating fan according to the pollution state of the air. CONSTITUTION: A microcomputer 10 judges current indoor pollution state with the logical value of an air pollution detection signal from a pollution detector 20 and decides the logical value of a first motor driving signal, the logical value of a second motor driving signal and the logical value of an indication control signal. A first motor drive part 30 rotates a cooling/heating fan motor 60 at the speed corresponding to the logical value of the first motor drive signal transmitted from the microcomputer 10. A second motor drive part 40 rotates a ventilation fan motor 70 at the speed corresponding to the logical value of the second motor driving signal transmitted from the microcomputer 10. An indicator 50 indicates the state of cleanness of current indoor air according to the logical value of the indication control signal of the pulse signal format from the microcomputer 10. |
