Roller loosening device for caked food after quick freezing

The invention discloses a roller loosening device for caked food after quick freezing, which is arranged on a conveying freezing bed. The roller loosening device comprises a loosening roller arranged on a rack of the conveying freezing bed and located above a net belt of the conveying freezing bed and a power device provided for the loosening roller, wherein the loosening roller is connected with the power device by a chain tensioning device; the chain tensioning device comprises a tensioning chain wheel, a pull rod and a spring, and also comprises a motor chain wheel arranged on an output shaft of the power device and a loosening roller chain wheel arranged on an input shaft of the loosening roller; the tensioning chain wheel, the motor chain wheel and the loosening roller chain wheel form a triangle and are connected together by chains; one end of the pull rod is connected with the tensioning chain wheel, the other end of the pull rod is fixed on the rack; and one end of the spring is fixed on the pull rod, and the other end of the spring is fixed on the rack. The roller loosening device can ensure that cakes can be continuously loosened on the premise of not damaging the freezing bed, can be adapted to products with different external dimensions and is wide in application scope.