DEVICE FOR AIR RECIRCULATION IN AGRICULTURAL MACHINE Russian patent published in 2015 - IPC A01C7/04 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machine, namely to drill for sowing seeds, which contains the seed-dispensing device for dispensing seeds. The seed-dispensing device comprises a wall which is made with the ability of rotation. The seed-dispensing device is also made with the ability to communicate with the means of applying pressure for providing the pressure difference on the walls between the seed receiving side, the high pressure side, the wall and the side, the low pressure side, the wall which is opposite the seed receiving side. The wall is made with a plurality of through retaining holes for receiving the seeds on the seed receiving side of the wall by the pressure difference on the walls, in retaining holes. The seeds are then moved by the rotation of the wall to the distance of the wall movement, and they are released from the wall. The means for applying pressure comprises a pneumatic device connected to the air duct and providing the main air flow through the air duct toward the seed receiving side of the wall. The return pipeline is connected between the wall side which is opposite the seed receiving side, and the pneumatic device, and in the return pipeline the part of the main air flow is transferred back into the air duct and/or to the inlet side of the pneumatic device, and the part of the main air flow is directed downwards into the soil through the outlet pipeline.

EFFECT: invention enables to reduce the release of contaminated air that passes through the sown seeds.

10 cl, 6 dwg