Automatic hopper is pressed to fine setting solar term

The utility model discloses an automatic hopper is pressed to fine setting solar term, including feeding cotton fan with the atmospheric pressure hopper and connect the defeated cotton wind channel of feeding between cotton fan and atmospheric pressure hopper, defeated cotton wind channel has and quantizes the fine setting part of adjusting with atmospheric pressure automatic control or with frequency conversion, servo motor, should fine setting part for with extension or the mode buffering and the undulant telescopic fine setting part of balanced wind channel internal gas pressure that shorten, finely tune the air intake of partial air outlet that is arranged in hello cotton fan or atmospheric pressure hopper or fail the arbitrary position in cotton wind channel. The utility model discloses simple structure, low cost just can fail the pressure in cotton wind channel through the mode of extending or shortening with buffering and balance according to the pressure size to guarantee to supply cotton stability.