The invention provides an
air cooling refrigerator and a
defrosting control method thereof. The
air cooling refrigerator comprises an air
flue, a cooler, an image shooting device, one or more frosting indicator cards and a
defrosting device, wherein the air
flue provides
refrigeration air flow for a chamber of the refrigerator, and a
cooling chamber where the cooler is arranged is arranged in the air
flue; the cooler serves as the cold source of the refrigerator and carries out
refrigeration on air flow passing the cooler; the image shooting device is arranged in the
cooling chamber and shoots the cooler; the frosting indicator cards are arranged on the part, within the
shooting range of the image shooting device, in the cooler, and the colors the frosting indicator cards obviously contrast with the color of the cooler and white; the
defrosting device is attached to the cooler and is started when it is determined that the frosting indicator cards are covered with
frost according to the images taken by the image shooting device to defrost the cooler. According to the technical scheme, defrosting is carried out in time before the
heat transfer efficiency of the cooler is poorer, and influences of frosting on the heat exchange efficiency of the
air cooling refrigerator are effectively avoided.