Refrigerated truck refers to the closed compartment transportation vehicle used to maintain the temperature of frozen or fresh goods, refrigerated truck is equipped with refrigeration unit refrigeration device and polyurethane insulated compartments of refrigerated transport vehicles, refrigerated trucks can be classified according to manufacturers, chassis carrying capacity, compartment type. Refrigerated trucks are commonly used to transport frozen food (refrigerated trucks), dairy products (dairy trucks), vegetables and fruits (fresh food trucks), and so on.