The solar energy water heater temperature control circuit composed of the thermistor

Published:2011/8/23 22:29:00 Author: | Keyword: solar energy, water heater, temperature control, thermistor | From:SeekIC

The solar energy water heater temperature control circuit which is composed of the thermistor is as shown in the figure. In this circuit, the thermistor RT1 detects the temperature of the water in the collector, RT2 detects the temperature of the water in the storage device. The temperature changes into the corresponding voltage through the thermistor, and this voltage adds to the input port of the comparator Aa, the output comparison result of A1 controls the circulation pump through the relay K1. The resistance value of the (R(RPl)+Rl) decides the action of the pump, in the actual situation, the resistance value is about 12-18Ω. For example, when the resistance value of (R(RPl)十Rl) is 13Ω, the water temperature of the storage device is 30℃.



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