Absorber for a thermal solar panel

An absorber for solar panel, provided to contain heat-bearing fluid, comprising

• first and second plates extending in a direction and arranged opposite each other and fixed together by means of a plurality of connection points, said first and second plates arranged as a first plate and a second plate with each having an outer face with said outer face of said first plate not in contact with said outer face of said second plate,
• first and second matrices of geometric donut shapes protruding and formed on the outer face respectively of the first and second plates, the matrices of the first plate arranged in a first row and being offset in said direction relative to the matrices of the second plate arranged in a second row adjacent to said first row to ensure a circulation path of the heat-bearing fluid in the absorber, said donut shapes of said first plate are spaced apart from each other and said donut shapes of said second plate are spaced apart from each other, said donut shapes have annular portions with said annular portions on said first plate arranged across but spaced apart from and intersect annular portions on said second plate forming said circulation path and allowing fluid flow across said first and second plates through said path,
• inlet means and outlet means of the heat-bearing fluid arranged respectively at one end and at the other end of the circulation path of the heat-bearing fluid,
• wherein at least some of the geometric shapes have a general protruding form, hollow in its centre so as to define a cavity, and
• in that at least some of said connection points, non-traversing, are arranged in at least some of said cavities.