| 摘要 |
<p>PURPOSE:To heat the whole of water in a hot water storage tank efficiently and speedily by a method wherein a low temperature level heat exchanger and a high temperatue level heat exchanger are arranged within the upper part and the lower part, respectively, of the space in the hot water storage tank so that the heat exchange efficiencies of both of the heat exchangers are increased. CONSTITUTION:The hot water storage tank 3 is connected with a hot water outlet pipe 1 and a water supply pipe 2 at the upper part and the lower part thereof, respectively, and a partition wall 4 or dividing the interior of the tank into an upper space 3A of large capacity and a lower space 3B of small capacity is provided integrally with the tank 3. Then the low temperature level heat exchanger 5 is provided at the lower part of the upper space 3A and the high temperature level heat exchanger 6 is provided in the intermediate part of the lower space 3B. Further, a pipe 8 which forms a low temperature hot water flow-down passage 7 extending between the lower part of the upper space 3A and the lower part of the lower space 3B and a pipe 10 which forms a high temperature hot water flow-up passage 9 extending between the upper part of the lower space 3B and the upper part of the upper space 3A are fixed to the partition wall 4. Accordingly, it is possible to operate the low temperature level heat exchanger efficiently over a prolonged period of time.</p> |
