Phase-change convection heat transfer cooling and heat-insulation cup sleeve and using method thereof

The invention belongs to the technical field of phase-change convection heat transfer cooling, and particularly relates to a phase-change convection heat transfer cooling and heat-insulation cup sleeve and a using method thereof. The phase-change convection heat transfer cooling and heat-insulation cup sleeve comprises a cup sleeve body, a cup sleeve bottom and ribs, wherein the cup sleeve bottomis arranged on the bottom of the cup sleeve body; the ribs are arranged on the outer surface of the cup sleeve body; the cup sleeve body and the ribs are made of sponge materials; when used as a cooling cup sleeve, the cup sleeve is wetted with water, and is placed in a ventilating environment, and the to-be-cooled cup body is placed in the cup sleeve; with the aid of a phase-change convection heat transfer process of water and an environment and meanwhile capability of heat transfer enhancement of the ribs, a rapid cooling function can be achieved at a normal temperature; when used as a heat-insulation cup sleeve, th