Solar radiation absorbing panel

Abstract

An invention proposes a solar radiation absorbing panel that serves preferably for air heating, The solar radiation absorbing panel is constructed from two metal sheets. The metal sheets are sealingly joined along their edges. The metal sheets are provided with mechanical or magnetic means; the both metal sheets are interlocked by these means along some lines or at some spots. This ensures diminishment of buckling these sheets under operating pressure and establishing of a certain distance between them with small deviations with respect to its average value. The outer side of one metal sheet is coated with a black or selective paint absorbing solar radiation.

1 . A solar radiation absorbing panel comprising:
 two substantially parallel first and second metal sheets situated at distance of some millimeters relative one another; both said metal sheets are fabricated from ferromagnetic metal; the outer surface of said first metal sheet is covered with a paint absorbing solar radiation; two terminal sections of said second metal sheet are provided with openings; said metal sheets are sealingly joined along their edges;   two headers are fastened on the said terminal sections of said second metal sheet; one of said headers is provided with an inlet connection and said other—with an outlet connection;   there is a set of cylindrical dimples formed on said second longitudinal sheet; said cylindrical dimples are directed outward the spacing between said first and second metal sheets;   permanent cylindrical magnets are placed in said cylindrical dimples; the height of said permanent cylindrical magnets is higher than the depth of said cylindrical dimples.   
     
     
         2 . The solar radiation absorbing panel as claimed in  claim 1 , wherein the cylindrical dimples of the second metal sheet are directed inward the spacing between the first metal sheet and said second metal sheet, and ring permanent magnets are fastened around said cylindrical dimples; the height of said ring permanent magnets is higher than the depth of said cylindrical dimples. 
     
     
         3 . The solar radiation absorbing panel as claimed in  claim 2 , wherein the spherical dimples are directed inward the spacing between the first and second metal sheets and ring permanent magnets are fastened around said spherical dimples; the height of said ring permanent magnets is higher than the depth of said spherical dimples. 
     
     
         4 . The solar radiation absorbing panel as claimed in  claim 1 , wherein there is a frame with a set of parallel metal strips installed in it; said metal strips are fabricated from a spring metal and each said metal strip is provided with some omega-shaped sections of the same direction; the cylindrical permanent magnets with diameter somewhat higher than the diameter of said omega-sections are installed in said omega-sections and held in them by forces of elastic deformation of said omega-sections; said frame with said strips and said permanent magnets is placed between two flat metal ferromagnetic sheets; one of said flat metal ferromagnetic sheets is provided with two sets of openings at its opposite terminal sections; said flat metal ferromagnetic sheets are sealingly joined, provided with headers and the inlet/outlet connections and the paint absorbing solar radiation as it is claimed in  claim 1 . 
     
     
         5 . The solar radiation absorbing panel as claimed in  claim 1 , wherein the internal surfaces of the first and second metal ferromagnetic sheets are covered with a black paint. 
     
     
         6 . The solar radiation absorbing panel as claimed in  claim 1 , wherein the outer surface of the first metal ferromagnetic sheet is covered with a solar selective coating. 
     
     
         7 . The solar radiation absorbing panel as claimed in  claim 1 , wherein a fan is installed immediately on the back side of the second metal ferromagnetic sheet instead of the header provided with the inlet connection; the aperture of said fan overlaps completely the openings in the terminal section of the metal ferromagnetic sheet related to said header. 
     
     
         8 . A solar radiation absorbing panel comprising:
 two substantially parallel first and second longitudinal metal sheets situated at a distance of some millimeters relative one another; the outer surface of said first metal sheet is covered with a paint absorbing solar radiation; the terminal sections of said second metal sheet are provided with openings; said longitudinal metal sheets are sealingly joined along their edges;   two headers are fastened on the said terminal sections of said second longitudinal metal sheet; one of said headers is provided with an inlet connection and said other—with an outlet connection;   parallel opposite profiles are fastened on the internal sides of said first and second metal sheets, said distance of some millimeters relative one another is determined by the heights of said profiles; the pairs of said opposite profiles are interlocked.   
     
     
         9 . The solar radiation absorbing panel as claimed in  claim 8 , wherein said opposite profiles are V-shaped angles with their pairs oriented oppositely on the first and second metal sheets. 
     
     
         10 . The solar radiation absorbing panel as claimed in  claim 9 , wherein one longitudinal section of each of the V-shaped angle is perforated or toothed. 
     
     
         11 . The solar radiation absorbing panel as claimed in  claim 8 , wherein said opposite profiles are Z-shaped profiles (Zee beams) with their pairs oriented oppositely on the first and second metal sheets. 
     
     
         12 . The solar radiation absorbing panel as claimed in  claim 11 , wherein one longitudinal shelf and/or the web of each of the Z-shaped profiles is perforated or toothed. 
     
     
         13 . The solar radiation absorbing panel as claimed in  claim 8 , wherein said opposite profiles are U-shaped with their pairs oriented oppositely on the first and second metal sheets. 
     
     
         14 . The solar radiation absorbing panel as claimed in  claim 13 , wherein one longitudinal section and/or the web of each of the U-shaped profiles is perforated or toothed. 
     
     
         15 . The solar radiation absorbing panel as claimed in  claim 8 , wherein one profile of a pair intended to be interlocked is shaped as an angle section and its protruded shelf provided with longitudinal rectangular perforations, and the second one is an angle section, which has a blunt angle between its shelves, and its protruded shelf is toothed. 
     
     
         16 . The solar radiation absorbing panel as claimed in  claim 8 , wherein one profile of the pair intended to be interlocked is a corrugated strip with rectangular corrugations and the second one is an angle section with a blunt angle between its shelves, and its protruded shelf is toothed. 
     
     
         17 . The solar radiation absorbing panel as claimed in  claim 8 , wherein said opposite profiles are realized as louvers fabricated by slitting in the first and second metal sheets; the openings of said louvers are sealingly closed by metal strips and said louvers are oriented oppositely on said first and second metal sheets. 
     
     
         18 . The solar radiation absorbing panel as claimed in  claim 8 , wherein the internal surfaces of the first and second metal sheets are covered with a black paint. 
     
     
         19 . The solar radiation absorbing panel as claimed in  claim 8 , wherein the outer surface of the first metal sheet is covered with a solar selective coating. 
     
     
         20 . The solar radiation absorbing panel as claimed in  claim 8 , wherein a fan is installed immediately on the back side of the second metal sheet instead of the header provided with the inlet connection; the aperture of said fan overlaps completely the openings in the terminal section of said metal sheet related to said header.