UV resistant climate test chamber body using CNC machine tools, processing, modelling beautiful generous, box cover for two-way clamshell type operating liner using imported advanced stainless steel plate, external box liner is made of A3 steel plate spray, an increase of appearance and cleanliness. Heating method for bladder type heat sink, heating speed, uniform temperature distribution. Drainage system using the back vortex type and the U type product sink device drainage, convenient user clean.