| 摘要 |
<p>PURPOSE:To prevent connection of a thermistor to be forgotten, and to operate safely a heating control device with simple constitution, by providing a lead wire for connecting a heating controlling circuit and the ground, as one body with a connector connected to a negative characteristic thermistor. CONSTITUTION:Negative characteristic thermistors 10, 11 are placed in a load of a combustor, and its connecting line 15 is connected to the ground of a combustion controlling circuit 3 by a connecting terminal 14c of a connector 14. Also, input terminals 4, 5 of the controlling circuit 3 are connected to connecting terminals 14a, 14b of the connector 14, one end of the thermistors 10, 11 is connected to the connecting terminals 14a, 14b, and the other end of the thermistors 10, 11 and the connecting line 15 are connected to the negative pole of a power source 1 through a connecting terminal 14d of the connector 14. Also, the connector 14, the controlling circuit 3 and other driving relay 7, etc. except the thermistors 10, 11 are provided on the same substrate. According to such constitution, in case the connector 14 is not connected, the terminal 14c and 14d are disconnected, and the combustion controlling circuit 3 and the relay 7 are not operated, therefore, forgot connection of the thermistors 10, 11 is prevented and the combustor is operated safely with simple constitution.</p> |
