Refrigerating unit with function of protecting refrigerating system

The utility model relates to the technical field of refrigerating equipment, in particular to a refrigerating unit with a function of protecting a refrigerating system, which comprises a device shell, and the middle of the bottom end in the device shell is fixedly connected with a refrigerating main body through a nut; by installing a brush plate, when an exhaust fan operates to suck outside air into the device shell, the outside air can be filtered through a second filter plate, and meanwhile the brush plate can be driven to scrape and remove dust on the second filter plate in the rotating process of the exhaust fan; the brush plate is longer than the second filter plate, so that the outer surface above the second filter plate can be uniformly dedusted, and the inclination angles of the two sides of the brush plate enable the brush plate to rotate under the driving of the rotation of the exhaust fan so as to enable the dust above the second filter plate to flow back to the side far away from the second filte