| 摘要 |
PURPOSE:To make a device confromable to a state of anything trouble happening, by separating temperature related elements from a control in time of trouble happening in operation of control in a system, while installing an emergency circuit which actuates at least a part of these elements directly with a power source. CONSTITUTION:Taking notice of anything unusual, when an emergency switch 212 is closed, a coil of a relay 213 is excited and a normally closed contact is opened. Therefore, a heating unit 203, a blower unit 204, a water cock 205 and an air valve 206 are all no longer supplied with power. On the other hand, the normally closed contact is closed as usualy by excitation in the relay 213, and also a relay 211B keeps its exciting state whereby its contact is closed so that a blower motor 208 rotates without passing through a motor control circuit 202. Accordingly, when the switch 212 for emergency switch rotation is made into circuit, it can be set down to a defroster mode performing warm air blowing off from both defroster and floor sides. |
