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We designed a simple suction device on the back of the dustpan to carry out a full range of cleaning from large garbage to dust.
1. turn over the dustpan when big garbage is swept into it, in order to make the gap which is on the back of the dustpan to abutt the remainderl dust.
2. tread ,the air will be exhausted from the single air hole behind the device at a high speed.
3 .when release the footstep, the cabin pressure decreases, and the air hole close, then dust will be inhaled into the gap with the support of the air, and be stored.
Mr.Fajia Wang Mr.Jingrui An Mr.Ping'an Zhou