| 摘要 |
<p>Installation for controlling the operation of a circulation pump 3 in correspondence with a predetermined difference between the temperature of the water in a tank 1 and the temperature of the water in another tank 2, which comprises a comparator circuit 6 coupled to two thermistors for registering temperature 4 and 5 and to the circulation pump 3 for the continuous operation of the pump, when the signals of the two thermistors differ from each other by a predetermined value, and for a brief triggering of the pump 3 with time intervals for monitoring the temperature of the entire quantity of water in the tank 1.</p> |
