| 摘要 |
<p>PURPOSE:To enable the temperature of city water heated by solar heat to be raised or lowered, by a construction wherein a passage connecting between a solar hot water supplying device and a hot water supplying part is provided with a water-mixing part for mixing low- temperature city water into the passage while controlling the flow rate, a heating part is provided in a side passage communicated to the passage through a selector valve, and temperature-detecting means for operating the water-mixing and heating parts are provided. CONSTITUTION:With a cock at a hot water supplying part opened, heated city water supplied from a solar hot water supplying device 2 flows through a passage 4, and the temperature t1 thereof is detected by a temperature sensor S1. A processing part of a controlling part C compares the temperature t1 with a set temperature t3 required at the hot water supplying part 3. When the temperature t1 is higher, the processing part calculates a flow rate q2 for low-temperature city water from the temperature t2 of the low-temperature city water detected by a temperature t2 of the low-temperature city water detected by a temperature sensor S2, a flow rate q3 detected by a flow rate sensor 3 and the temperature t1, and the controlling part C operates a motor for a flow control valve 5 according to the flow rate q2 calculated. When the temperature t1 is lower, a selector valve 7 is changed over, and a heating means 10 is operated. When the temperature t1 of heated city water is equal to the set temperature t3, the heated city water is supplied directly to the hot water supplying part 3.</p> |
