Carbon dioxide phase change expansion excitation tube powdery medicament automatic feeding and mixing device

The invention discloses a carbon dioxide phase change expansion excitation tube powdery medicament automatic feeding and mixing device which comprises a controller, a rack and at least two feeding stations, and a vacuum feeding bin, a mixer and a temporary storage tank which are communicated in sequence are arranged in the rack. A vacuum pump, a vacuum feeding pipe and a vacuumizing pipeline are arranged on the outer side of the rack, one end of the vacuum feeding pipe is communicated with the vacuum feeding bin, and the other end of the vacuum feeding pipe is communicated with the feeding stations respectively. One end of the vacuumizing pipeline is communicated with the vacuum feeding bin, and the other end of the vacuumizing pipeline is communicated with the vacuum pump. The controller is electrically connected with the vacuum pump and the mixer and is used for controlling the mixer to receive the mixed powder with the preset weight from the vacuum feeding bin so that the mixed powder can be fed into the t