What does the air heat pump oven main engine include?

The invention relates to an air heat pump drying box main engine, which comprises a cabinet and an air heat pump system. An air heat pump system for dehumidifying and heating the air passing through the cabinet is arranged in the cabinet, a first return air passage is formed between the top fan supporting plate and the top of the cabinet, and the same reason is that the inner wall of the cabinet is provided with a bottom fan supporting plate, and a second return air passage is formed between the bottom fan supporting plate and the bottom end of the cabinet, a coaxial fan installation groove is arranged on the top fan support plate and the bottom fan support plate, and a convection fan is fixed in the fan installation groove, convection air flows from the middle to the two sides of the cabinet, drying the materials on the grid tray placed in the two sides of the oven, while the air heat pump system dehumidifies and heats the passing air.