Semiconductor refrigeration sheet and portable heat preservation box

The utility model discloses a semiconductor refrigeration sheet and a portable heat preservation box. The semiconductor refrigeration sheet at least comprises two stacked ceramic sheets and a semiconductor crystal grain layer filled between the two ceramic sheets. The semiconductor crystal grain layer comprises a plurality of semiconductor crystal grains arranged in a matrix mode, a plurality of copper bars are fixedly arranged on the side face, facing the semiconductor crystal grains, of the ceramic wafer, the copper bars are formed by etching a whole copper plate covering the ceramic wafer,and the semiconductor crystal grains are welded to the copper bars through welding materials. The semiconductor refrigeration sheet is simple to manufacture, good in conduction effect and high in flatness, and the heat preservation box adopting the semiconductor refrigeration sheet is small in size and good in heat preservation effect. 本实用新型公开了一种半导体致冷片及便携式保温盒，所述半导体致冷片至少包括两个层叠设置的陶瓷片以及填充在两层所述陶瓷片间的半导体晶粒层，所述半导体晶粒层包括若干呈矩阵排列的半导