| 摘要 |
A water heating system having a system inlet pipe (1.002), a hot water delivery pipe (1.003) and a hot water return pipe (1.006) connected to a building hot water distribution network (1.024); the water heating system including one or more water heaters (1.001), the or each water heater having a heater inlet (1.022) and a heater outlet (1.023), a hot water return pipe (1.006) connected between the system inlet and delivery outlet via the building hot water distribution network to form a close loop hot water supply-return circuit; a pump (1.005) connected to circulate water through the hot water supply-return circuit whereby the pump can circulate water through one or more of the water heaters; a valve means (1.007) [a first non-return valve] adapted to prevent inlet water (water delivered to the system inlet) from flowing into the hot water return pipe or the building hot water distribution network. Figure 1 FIGURE 1 1.000 1.001a 1.001n 1.100 1.0031 1.003: 1.023 1.002 --- 1.0021 1. 05 1.002 1.0022 2.010 A------- ................. 2.001a 2.001n see % ---------------- 4 2.0042.012 2.007 , .0 2.004.Z~ 2.005 2.008,' 2.006/ ------------- |
