The invention relates to the field of
refrigeration equipment, in particular to an air duct
system inside a refrigerator. The air duct
system comprises a tank body, a tank linear, an
evaporator and a fan. A middle air duct
assembly comprises a casing and a freezing air return hose in the casing, and the casing is provided with a freezing air return inlet, a
refrigeration air supplying inlet, a
freezing chamber water collecting tank, a freezing air return outlet, a
freezing chamber water discharging tank, a
refrigeration air return opening and a ventilation door chamber. The freezing air return inlet is communicated with a
freezing chamber, the refrigeration air supplying inlet is communicated with a freezing air duct, the freezing chamber water collecting tank is located below the
evaporator, the freezing air return outlet is communicated with the freezing chamber, the freezing chamber water discharging tank is communicated with the freezing chamber water collecting tank, the refrigeration air return opening is communicated with the refrigeration chamber, the ventilation door chamber is communicated with the refrigeration air supplying inlet, and the freezing air return hose is communicated with the freezing air return inlet and the freezing air return outlet. According to the structure, the tightness of the air duct is effectively improved, a pipeline structure of the tank body is simplified,
assembly is simplified, the electric ventilating door can be embedded in a middle air duct, and the space of the refrigeration chamber is not occupied.