| 摘要 |
PURPOSE:To simplify operation without waste of electric power and reduce a blowing resistance, by simultaneously controlling a blower motor for a car heater and a sheet heater with a single control switch. CONSTITUTION:When a control switch 2 is selected to a position H under an ON condition of an ignition switch 7, a contact point 21 comes into contact with a contact point 22 and a blower motor 1 is directly connected to a battery 4 to be rotated at high speed. At the same time, sheet heaters 31 and 32 are also directly connected to the battery 4 in parallel to effect rapid heating. When the control switch 2 is selected to a position M, the contact point 21 comes into contact with the contact points 22 and 23, and a relay 51 is turned on to connect the blower motor 1 and a sheet heater 3 to the battery 4 in series, thereby effecting a medium level heating. Further, when the control switch 2 is selected to a position L, the contact point 21 comes into contact with the contact points 22, 23 and 24, and the relays 51 and 61 are turned on to connect the blower motor 1 to the sheet heater 3 in series, and also connect the sheet heater 31 to the sheet heater 32 in series, thereby effecting minimum heating. Thus, there is provided no reduction resistance for the blower motor in a blowing passage, thereby reducing a blowing resistance. |
