| 摘要 |
PURPOSE:To heat promptly small amount of water by a method wherein a heat collecting circuit connected to a heat pump circuit at upper and lower positions of a heat storage tank is provided. CONSTITUTION:A compressor 1, a heat exchanger 7, a expansion valve 3 and a heat collector 4 comprise a heat pump circuit. The heat exchanger 7 is thermally and closely arranged in this circuit to a refrigerant path 8 in centre, a path of the first circulating circuit 12 and a path of the second circulating circuit 21 in both sides. These three pathes are coiled in spiral condition. The first circulating circuit is connected to the lower side and the second circulating circuit is connected to the upper side of a heat storage tank 10. The pump 22 in the second circulating circuit is controlled by the second hot-water temperature detector positioned above level from the centre of the heat storage tank, heating firstly the upper portion of the water up to the predetermined temperature secondly lower portion of water similarly. |
