▎ 摘　　要

NOVELTY - The utility model claims a new cooling technique area, especially relates to a kind of one open cooling device. Table includes, a refrigerating sheet, a power connected with the refrigerating sheet and is the direct current power supply and power supply, said refrigerating sheet comprises used for cold side of heat, for heat end of heat abstractor, equipped with the N type semiconductor at the cold end and hot end between, is set with the P type semiconductor at the cold end and the hot end between, and connected with the N type semiconductor and metal conductor and the P type semiconductor, the metal conductor is set with used for connected with positive negative electrode of the electric source, the cold end and the table guide heat connection, wherein the N type semiconductor is set with graphene, or the P type semiconductor is set with graphene, or said N type semiconductor and said P type semiconductor are provided with graphene. Compared with the existing technology of the refrigeration sheet, the same heat lower end can get lower temperature cold side temperature, which greatly increase of cooling effect.