| 摘要 |
PURPOSE:An auxiliary heating tank is connected to a piping fitted with a heat accumulation tank and 3-direction electromagnetic valves, and by switching the 3-direction electromagnetic valves, a highly efficient and economical heating device is obtained. CONSTITUTION:Hot water obtained by solar heat collector 1 is stored in high temperature heat accumulating tank 2 and low temperature heat accumulating tank 3. Hot water in low temperature heat accumulating tank 3 becomes the water heat source of heat pump 4 when solar irradiation is insufficient and together with air heat source 6 raises the temperature of the hot water in high temperature heat accumulating tank 2. Three-directional electromagnetic valve 12 is provided on the return pipe which goes from heat pump 4 to high temperature heat accumulating tank 2, and this is linked to auxiliary heating tank 9 which has heater 10, via pipes 13 and 14, which open at the upper and lower sides of auxiliary heating tank 9, and 3-direction electromagnetic valve 15. Temperature sensing units are provided at upper stream part 11 of electromagnetic valve 12 on the return pipe, at upper part 16 of auxiliary heating tank 9 and at the bottom part 17 of high temperature heat accumulating tank 2, and by their signals, the switching is operated by means of controller 18. |
