| 摘要 |
PURPOSE:To enable to obtain hot water of a high temperature from the upper half of a tank and hot water of a low temperature from the lower half of the tank, by constituting two kinds of water circuits. CONSTITUTION:Superheated coolant discharged from a compressor 10 forms a refrigeration cycle through which the superheated coolant is decompressed by a decompressor 13 after condensation of the same in the first water coolant heat exchanger 11 and the second water coolant heat exchanger 12 and then evaporated by an air coolant heat exchanger 14, which is sucked again into the air compressor 10. On the one hand, the water pumped up from the lower part of a tank 17 by the first pump 18 forms a water cycle through which the water is returned again to the upper part of the tank after it has been sent to the first water coolant heat exchanger 11, and the water pumped up from the lower part of the tank 17 by the second pump 20 forms a water cycle through which the water is returned again to an intermediate part of the tank 17 after it has been sent to the second water coolant heat exchanger 12. As the water quantity to be streamed through the first water coolant heat exchanger 11 is designed to be rather small beforehand and further heat exchange between the water and superheated gas which is a coolant, is performed, the hot water of a high temperature is obtained and the hot water whose temperature is different from that of hot water to be obtained through the second water coolant heat exchanger 12 is obtained. |
