Old powder cleaning equipment and old powder recycling equipment for 3D printer

The utility model discloses old powder cleaning equipment and old powder recycling equipment for a 3D (three-dimensional) printer, which have the advantages of good cleaning effect, high efficiency and low energy consumption, and can be used for completely cleaning and recycling floating old powder on a printing model so as to improve the utilization rate of materials. In the old powder cleaning equipment, a powder cleaning platform is provided with a sealed space for a printing work box to enter and exit, and a powder cleaning station is arranged in the sealed space; the powder cleaning mechanisms are arranged in the sealed space, the number of the powder cleaning mechanisms is at least two, the powder cleaning mechanisms are arranged around the circumference of the powder cleaning station, each powder cleaning mechanism comprises a powder cleaning spray gun and a first driving part, and the output end of each first driving part is connected with the corresponding powder cleaning spray gun and can drive the