| 摘要 |
<p>PURPOSE:To reduce the rang of water temperature reduction and manufacturing cost by a method wherein a plurality of hot water generators and a main water supply pipe are connected with circulating piping and required number of the hot water generators in response to the water temperature in the main water supply pipe are put into operation. CONSTITUTION:A hot water heating arrangement 8 consists in heapingly fixing in two rows by means of frames 11 four unit hot water heaters 10, each of which comprises in housing the hot water generator 11 in a receiving case 9 with the same form as the other three, and exhaust tubes 12 are arranged from a central exhaust space 13 to a concentrated exhaust top 14. Below the unit hot water heaters lying in the lower row, the main water supply pipe to convey hot water is located. The same number of supply port sockets 17 as the number of the unit hot water heaters 10 are provided on the periphery of the main water supply pipe 4 at this upstream side and connected through respective water supply pumps 3 by means of supply pipes 18 to the inlet side of the heat exchanger of each unit hot water heater 10. Similarly, four return port sockets 19 are provided on the periphery of the main water supply pipe 4 at its downstream side and connected by means of return pipes 20 to the outlet side of the heat exchanger of each unit hot water heater 10. In the structure as mentioned above, the number of unit hot water heater 10 to be driven is determined in response to the water temperature in the main water supply pipe 4, which is detected with a temperature detector 21.</p> |
