CT-C series hot air circulation drying oven uses a low blower and high temperature proof axial flow blower and an automatic temperature control system. The whole circulation system is the fully enclosed to make that the heat efficiency of the drying oven increases from 3-7% of the traditional drying oven to 35-40% of then present of the present one. The highest heat efficiency can reach 50%.The successful design of CT-T hot air circulation the advanced level both at home and abroad. In order to save a large quantity of the energy in our country, in order to enhance the economic results of the enterprises, in 1990,the medicine management bureau of the State issued the industry standard and the uniform type is RXH