| 摘要 |
PURPOSE:To aim at reduction in noises as well as in watt consumption, by constituting a device so as to drive a main cooling fan alone if an air conditioner is turned off even at the time of more than the specified value in cooling water temperature, in case of controlling the twin fan type cooling fan for a car provided with the air conditioner. CONSTITUTION:When cooling water temperature exceeds the specified value in a state that an air conditioner inside a car is turned off, a switch 12 opens, and with action of a diode 16, a coil 8c is not energized even if a transistor 13 is in a state of being turned on, closing a relay switch 8. At this time, since contacts 9a and 9m of a relay switch 9 are kept in connection, no continuous rating current runs to a sub-cooling fan motor 6 because of a relay switch 10 being opened, whereby a main cooling fan motor 5 alone is energized with current. With this constitution, reduction in fan noises as well as in watt consumption is promoted. |
