This series Sterile Spray Dryer with low consumes is the main drying equipment to make powder injection in the pharmaceutical industry, also got the extensive application in the Chinese herbal medicine profession currently, and designed 2 L/h mini sterile spray dryer with low consumes for the research department experiment uses. This series of drying machine is provided compressed air. Instead of a filter system with activated carbon, being heated by hot air or hot steam and electricity compensator. In the filtering system it has pre-filter, secondary filter and high efficient filter, raised the decontamination quantity of the hot air thus and consumedly, lower the motive depletion. Efficient air filter takes micro fiber glass paper as medium, using to bear 0-150℃ felted material to seal and pack, the decontamination degree can attain no more than 10 /L for 0.5um dust, has high purified qulity, really meet the low-consume and sterile requirements.