| 摘要 |
PURPOSE:To obtain a safety operation circuit for operation of a heater, by a method wherein ON and OFF switches for a heater are provided in series with a solenoid relay respectively so that ON and OFF of the heater are switched by a contact point of the solenoid relay. CONSTITUTION:A titled circuit is so constituted that contact point 11a1, 11b1, 11a2 and 11b2 are provided on a coil 11 and electrification to an electric heater is done by action of the relay 11 by making a circuit close by pushing the ON switch of the heater, in the operation circuit of a titled air conditioner provided with the coil 11 of a solenoid relay, the ON and OFF push button switches 12 and 13 of the electric heater, a temperature fuse 4, an operation switch 5 of an electrical dehumidifier, a coolant compressor 6 of a refrigeration cycle, a blower motor 7, an air quantity changeover switch 8, a temperature sensing switch 9 and a coil 10 of a solenoid valve for defrosting. With this construction, at the time of application of the titled air conditioner after power failure or nonuse for a long period of time, reelectification to the electric heater is interrupted and careless and unsafe heating operation can be prevented completely. |
