Abstract: A seawater desalination device including: a seawater introducing and filtering device, a seawater reverse osmosis filtering device, and a control circuit. The seawater reverse osmosis filtering device includes a first control valve and a second control valve. The seawater introducing and filtering device is connected to the first control valve of the seawater reverse osmosis filtering device. The second control valve is disposed at a terminal pipe of the seawater reverse osmosis filtering device. The control circuit is adapted to control operations of the seawater reverse osmosis filtering device.

Abstract: Provided is a floating water wave energy collection and conversion system, which comprises at least two buoyant members (101, 102) floating on the surface of the water and connected movably with each other in series, wherein the movable connection can be a hinged connection. A power transmission device and an energy conversion device (103) are provided on the buoyant members and the power transmission device and the energy conversion device (103) of adjacent buoyant members (101, 102) are movably connected with each other, being able to make a relative movement with respect to each other. As water waves fluctuate, two adjacent buoyant members (101, 102) rotate relatively, with an axis of a hinge shaft as the centre line, so as to drive the power transmission device and the energy conversion device (103) on the buoyant members to make a relative movement, thereby achieving energy conversion.