Patent ID: 7607195

Claim:
Cleaning unit of roads and the like, comprising: a containment chamber ( 2 ) defined by an accumulation base ( 10 ), a suction apparatus ( 3 ) including a suction inlet ( 6 ) positioned close to the ground, and a filtration apparatus ( 12 ), said suction apparatus ( 3 ) being suitable to recycle the air, between said containment chamber ( 2 ) and said suction inlet ( 6 ), and including primary suction means ( 4 ) and secondary suction means ( 5 ) positioned in parallel to one another and above said accumulation base ( 10 ), said primary suction means ( 4 ) controlling said suction inlet ( 6 ) and said secondary suction means ( 5 ) being suitable to expel filtered air, and said containment chamber ( 2 ) including a separation element ( 9 ) that separates a turbulent zone ( 5 a ), in which exists air with a high level of turbulence and energy, and a recirculation zone ( 4 a ), in which exists air with a low level of turbulence and energy, said primary suction means ( 4 ) being placed in said recirculation zone ( 4 a ) and said secondary suction means ( 5 ) being placed in said turbulent zone ( 5 a ).