| 摘要 |
A water saving device (1) for a hot water discharging means, said device comprising: a housing having a hot water inlet chamber (5) having a hot water inlet (2) connectable to a hot water supply, a temperature sensing chamber (6) having a cold water outlet (3) connectable to a water storage system, and a hot water outlet chamber (7) having a hot water outlet (4) connectable to said hot water discharging means. The hot water inlet chamber (5) and said hot water outlet chamber (7) being interconnected by a first port (8), said hot water inlet chamber (5) and said temperature sensing chamber (6) being interconnected by a second port (9), and said temperature sensing chamber (6) and said hot water outlet chamber (4) being interconnected by a third port (10). The device also comprising a water-pressure actuated piston (20) being slideably mounted within the hot water inlet chamber (5) to define two separate sub-chambers (5a, 5b), the first sub-chamber (5a) being in fluid communication with the hot water inlet (2) and the second sub-chamber (5b) being in fluid communication with the hot water outlet chamber (7) via said first port (8). The piston (20) being displaceable upon a predetermined drop in water pressure in the hot water outlet chamber (7), caused when the hot water discharging means is opened, from a first position, in which the second port (9) is closed by the piston (20), to a second position, in which the second port (9) is open. The temperature sensing chamber (6) having a temperature- sensitive valve assembly (15), which that closes the third port (10) when the temperature of water flowing through the housing is below a predetermined level, and being arranged to open the third port (10) and close the cold water outlet (3), when the temperature of water flowing through the chamber (6) is above a predetermined temperature.
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