Solar-thermal collector

Abstract

A solar-thermal collector formed by an upper plastic layer facing solar rays and by a lower plastic layer not facing the solar rays, whereby between the two secured together plastic layers there is formed at least one hollow chamber for passage of a heat-transport medium. The upper plastic layer is transparent, and an inner surface of the upper plastic layer, which inner surface faces the hollow chamber, has an absorbing layer.

What is claimed is:  
     
         1 . A solar-thermal collector with a collector housing formed by an upper plastic layer facing solar rays and by a lower plastic layer not facing the solar rays, whereby between the two plastic layers there is formed at least one hollow chamber for passage of a heat-transport medium, wherein the upper plastic layer has a transparent design, and wherein an inner surface of the upper plastic layer, which inner surface faces the hollow chamber, has an absorbing layer.  
     
     
         2 . The collector according to  claim 1 , wherein the absorbing layer is integral and/or bonded with the upper plastic layer.  
     
     
         3 . The collector according to  claim 1 , wherein the absorbing layer is laminated onto the inner surface of the upper plastic layer.  
     
     
         4 . The collector according to  claim 1 , wherein the lower plastic layer is configured at least partly ray-absorbing.  
     
     
         5 . The collector according to  claim 1 , wherein the lower plastic layer is transparent.  
     
     
         6 . The collector according to  claim 1 , wherein the upper and the lower plastic layers are welded to one another.  
     
     
         7 . The collector according to  claim 6 , wherein the upper plastic layer is manufactured out of a different plastic material than the lower plastic layer.  
     
     
         8 . The collector according to  claim 1 , wherein the heat-transport medium is water.