Solar collector

Abstract

A solar collector, includes a glass sheet; a metal frame or another glass sheet and a metal frame; a seal between the glass sheet or sheets and the metal frame; the metal frame including a wall offset with respect to the seal and/or a wall connected to the seal by a low thermal conductivity material. The invention provides a solar collector which is compact and simple and improves solar radiation transmission.

1 . A solar collector, comprising:
 a glass sheet;   a metal frame or another glass sheet and a metal frame;   a seal between the glass sheet or sheets and the metal frame;   the metal frame comprising a wall offset with respect to the seal and/or a wall connected to the seal by a low thermal conductivity material.   
     
     
         2 . The solar collector as claimed in  claim 1 , further comprising an absorber and pipes in which a heat-transfer fluid circulates, the pipes being in contact with the absorber, and the absorber and the pipes being placed between the glass sheet and the metal frame or between the two glass sheets. 
     
     
         3 . The solar collector as claimed in  claim 1 , comprising a single glass sheet and a metal frame, the metal frame being provided with a bottom and a free edge of the metal frame being sealed to the glass sheet. 
     
     
         4 . The solar collector as claimed in  claim 1 , comprising two glass sheets and a metal frame, the edges of the metal frame being sealed to each of the two glass sheets. 
     
     
         5 . The solar collector as claimed in  claim 1 , wherein the glass sheet is, or the glass sheet and the other glass sheet are, tempered. 
     
     
         6 . The solar collector as claimed in  claim 1 , the solar collector being under a vacuum. 
     
     
         7 . The solar collector as claimed in  claim 1 , wherein the glass sheet is made of extra-clear glass. 
     
     
         8 . The solar collector as claimed in  claim 1 , wherein the glass sheet is provided with an antireflection coating. 
     
     
         9 . The solar collector as claimed in  claim 1 , wherein each glass sheet is joined to an additional glass sheet via a polymeric interlayer in order to form a laminated glazing unit.