| 摘要 |
<p>The pool cover (10) is made of a multi-layer light weight construction having a transparent top layer (14) to permit sunlight to pass through, an opaque bottom layer (15) for absorbing sunlight passing through the transparent layer. In addition, a plurality of pockets (16) are formed in the opaque layer having air encapsulated therein. When in use, the opaque layer becomes heated by sunlight thereby transferring heat by contact to the body of the water in the pool while also blocking light from the body of water to inhibit algea growth. The heated trapped air also serves to conduct heat to the body of water while also acting as a thermal insulation barrier during non-daylight hours. The pool cover may also be turned upside down in use. In other embodiments, all layers may be opaque (Fig 3).</p> |
