| 摘要 |
<p>Electrical appliance producing hot water which comprises: a hot water tank (6), a cold water buffer tank (5), an evaporator (7), a condenser (9), a refrigerating compressor (8), and an expansion element (10). The electrical appliance comprises a tap water inlet (1), a first pipe (2) from the tap water inlet (1), a second pipe (3) from the tap water inlet (1), a third pipe (29) from the tap water inlet (1) to a water-to-water exchanger (28) inlet, a waste grey water inlet (4) to supply water to the cold water buffer tank (5). The cold water buffer tank (5) has a first consumption cold water outlet (21) and a second surplus water outlet for drainage (20). The hot water tank (6) has a consumption hot water outlet (33).
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