Body cooling vest system and heat exchange method used for this system

The present invention relates to a body cooling vest device system and a method of heat exchange. The body cooling system consists of a jacket, a cooling unit, a solar panel and a belt. In particular, the belt is used to fix the cooling unit inside the jacket; the cooling element has the function of providing cool/cold air flow to the inside of the jacket to exchange heat; Solar panels are used to provide electricity for the cooling unit. The method of heat exchange is in the form of forced heat convection of the body-cooling jacket system either active (quartz stone) or passive (cooling gel ice set) using circulating fuel - Refrigerant is the outside air being pumped into the jacket shell, performing heat exchange at the cooling unit before exchanging heat throughout the inner surface of the jacket through the fan in the cooling unit.