Low-noise circulating fan system for refrigerator

The invention discloses a low-noise circulating fan system applied to a refrigerating chamber or a freezing chamber of a refrigerator. The system comprises a cross flow fan, a rear backplate, a guide cover and a cover plate, the cross flow fan is fixed on the rear backplate, the gradually-expanding-type guide cover is assembled at an air outlet at the front end of the cross flow fan, the cover plate covers on the rear backplate, the cross flow fan is contained in a space formed by the cover plate and the rear backplate, and a grid is arranged at a position, corresponding to the air outlet at the front end of the cross flow fan, on the cover plate to serve as an air outlet of the low-noise circulating fan system for the refrigerator. The low-noise circulating fan system for the refrigerator has the advantages that the cross flow fan is used, so that the area of the air outlet of the fan is improved, turbulence intensity of the air outlet is lowered, outgoing air is more uniform, and noise is smaller; and in addition, an air duct and the cover plate are designed rationally, so that space occupied by the fan and the air duct thereof is saved, and storage space of the refrigerating chamber or the freezing chamber is increased.