| 摘要 |
In a temperature regulator for soldering and unsoldering equipment having a heating device fed by a controllable electric source of heating current, the heating output of which is transmitted to a spot to be soldered by a heating output transmission device, a signal that is proportional to the temperature of the heating device is generated and compared in a comparator of a control circuit to a set value. The control circuit derives from the output signal of the comparator a control signal for controlling the source of heating current. In addition, a temperature sensor (5) is arranged in the area adjacent to the spot to be soldered of the heating output transmission device (3), the output signal of which is compared in another comparator (23) of another control circuit (23,27,28) to another set value (7). The second control circuit supplies another control signal for controlling the source (11) of heating current. The control signals from the first control circuit (13,17,18) are supplied to the first input and the control signal from the second control circuit (23,27,28) are supplied to the second input of an AND logical element (20), the output signal which only switches on the controllable source (11) of heating current when both control circuits simultaneously supply output signals for temperatures lying below the respective set values.
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