| 摘要 |
PURPOSE:To automatically reduce the amount of air-blow when the temporature of engine cooling water is low, by disposing a manual switch and a relay element which is closed when a water temperature switch is turned on, between a commong contact and a power feed line. CONSTITUTION:When the temperature of water is low, water temperature switches 5, 6 are opened and closed, respectively while a blower switch 4 is turned to M2, and an automatic switch is set to its automatic mode, so that a contact 8a is closed and a switch 7 is in its closed condition while a switch 1 is closed. Then, a relay 9 is operated to open its contact. Therefore, a relay 2 is deenergized so that a blower motor 3 is stopped, but an automatic condition indicating lamp 8c is turned on. Then, when the water temperature raises so that the water temperature switch 5 is operated, the relay 2 is energized to rotate the blower motor 3 at a low speed. Further, when the water temperature further raises, the water temperature switch 6 is opened to deenergize the relay 9 so that the blower motor 3 is rotated at M2. When a defroster blows out air in a low water temperature condition, a switch 7 is opened to deenergize the relay 9 so that the motor 3 is rotated at M2 irrespective of the water temperature, while the lamp 8c is turned off. |
