Patent ID: 7685832

Claim:
An energy picking-up system by using water of river, lake or sea as low-grade energy source, comprising: an energy collecting device, an energy exalting device and a radiator connected in series, wherein: the energy collecting device comprises a circuit having a heat collector disposed in a heat collecting well, a low-grade-energy-side heat exchange coil pipe, and a diving pump disposed in the heat collecting well and having one port connected with a fluid intake port of the low-grade-energy-side heat exchange coil pipe; and the heat collector comprises a siphon pipe having one port disposed in the heat collecting well near a river, lake or sea and another port disposed in the river, lake or sea, a drain pipe having one port connected with a fluid discharge port of the low-grade-energy-side heat exchange coil pipe and another port disposed in or on the river, lake or sea, and a vacuum equipment connected with the siphon pipe.