Solar collector

Abstract

A solar collector includes a first wall and a second wall facing one another, which between them delimit a housing, the first wall being transparent and intended to face in the direction of the solar radiation incident upon the collector, and an absorption device for absorbing the energy derived from the solar radiation and positioned in the housing, the absorption device including at least one pipe through which a heat-transfer fluid flows. In addition, the collector includes at least one transparent spacer arranged between the first wall and the absorption device in the region of the pipe.

1 . A solar collector comprising:
 a first wall and a second wall facing one another, which between them delimit a housing, the first wall being transparent and intended to face in a direction of a solar radiation incident upon the collector,   an absorption device configured to absorb the energy originating from the solar radiation and positioned in the housing the absorption device comprising at least one pipe through which a heat-transfer fluid flows, and   
       at least one transparent spacer arranged between the first wall and the absorption device in a region of the pipe. 
     
     
         2 . The solar collector as claimed in  claim 1 , wherein the absorption device comprises an absorbing panel thermally connected to the pipe, the spacer being arranged between the first wall and a portion of the absorber panel in thermal contact with the pipe. 
     
     
         3 . The solar collector as claimed in  claim 1 , wherein the spacer has a shape that is rounded in the direction of the absorption device. 
     
     
         4 . The solar collector as claimed in  claim 1 , wherein the spacer is of one piece with the first wall. 
     
     
         5 . The solar collector as claimed in  claim 4 , wherein the first wall and the spacer are made of toughened glass, the spacer being heat toughened with the first wall. 
     
     
         6 . The solar collector as claimed in  claim 1 , wherein the first wall is made of glass, the spacer being a feature in relief with respect to the first wall obtained by rolling the first wall. 
     
     
         7 . The solar collector as claimed in  claim 1 , wherein the spacer is a spacer made of chemically toughened glass. 
     
     
         8 . The solar collector as claimed in  claim 1 , wherein the spacer has a thickness less than 4 millimeters. 
     
     
         9 . The solar collector as claimed in  claim 1 , comprising at least one pair of spacers arranged one on each side of the pipe, comprising the first spacer between the first wall and the absorption device and a second spacer between the second wall and the absorption device. 
     
     
         10 . The solar collector as claimed in  claim 9 , wherein the second wall is made of metal, the second spacer being a feature in relief with respect to the second wall obtained by embossing the second wall. 
     
     
         11 . The solar collector as claimed in  claim 9 , wherein the second wall is identical to the first wall and symmetric with the latter with respect to a median plane of the collector. 
     
     
         12 . The solar collector as claimed in  claim 1 , wherein the housing is fluidtight and configured to be placed under vacuum. 
     
     
         13 . The solar collector as claimed in  claim 1 , comprising a spacer frame between the first and second walls. 
     
     
         14 . The solar collector as claimed in  claim 1 , wherein the solar collector has a thickness less than 30 millimeters. 
     
     
         15 . A cladding assembly for a structure, particularly a roof or a façade of a building, comprising at least one solar collector as claimed in  claim 1 .