Cold air conveying pipeline and fresh-keeping system

The utility model discloses a cool air delivery pipeline and fresh-keeping system, it includes delivery pipeline and flow regulation subassembly, flow regulation subassembly includes fixed base, drive piece, rotatory piece and a plurality of regulation blade, a plurality of regulation blade form the channel of variable size, fixed base is fixed connection in delivery pipeline, drive piece and rotatory piece are fixed in the delivery pipeline, and drive piece and rotatory piece are fixed in the delivery pipeline. The rotating part is rotatably connected to the fixed base, the driving part is connected with the rotating part and used for driving the rotating part to rotate, the adjusting blade is connected with the rotating part, and the size of the channel changes along with the change of the rotating angle of the adjusting blade; the whole device is simple in structure, the adjusting mode is convenient and fast, a user can adjust the cold air conveying amount according to the refrigeration requirement of actu