Polygonal prism type radiation heat exchange device

The polygon prism type radiation heat exchange device comprises a polygon prism body, and the section of the polygon prism body sequentially comprises points E, A, B, D, C, F, M, N, Q, K, H and G in the clockwise direction; two cavities enclosed by the point AEGH and the CFMN are heating devices respectively, the two heating devices are located on the two sides of the top of the downward concave part respectively, and prism surfaces where the line segments AE and FC are located are radiation heating surfaces respectively; a cavity enclosed by the points ABDCNQKH is a refrigeration device, and prism surfaces where the line segments AB, CD and BD are located are radiation refrigeration surfaces. Cold and heat can be provided at the same time, and the heat exchange efficiency of the radiation heat exchange device is improved.