| 摘要 |
PURPOSE:To prevent excessive temperature rise in the heat carrier in a collector and tank by discharging the hot water in the tank through an electro-magnet value when the temperature of the heat carrier in the collector becomes high and changing over a pump to continuous operation in order to lower the temperatures in the heat carrier and the tank. CONSTITUTION:When the temperature of the heat carrier in a collector 1 is raised to reach a set temperature, a high temperature sensor 11 senses it and changes over a circulating pump 2 from the ordinary differential temperature control (the control to turn a pump 2 ON when difference between the temperature in the heat carrier in the collector and the temperature of the water in a storage tank goes over a certain value in order to circulate the heat carrier and collect heat and to stop the pump 2 when the difference of temperature is under a certain value and stop the heat collection) to the state of continuous drive, and at the same time an electromagnet valve 8 is opened to discharge to outside the high temperature water in a tank 3, and cold water is resupplied from a water supply tube 5 through a pressure reducing check valve 5a. As a result, the temperature in the tank 3 drops and at the same time the temperature of the heat carrier in the collector 1 falls. |
