Patent ID: 11230957

Abstract:
An adaptive urea mixer comprises a housing (1) and a first movable plate (2), a second movable plate (3), and a first fixed ring (4) sequentially provided in a direction from an air inlet to an air outlet in the housing. The first fixed ring (4) is fixedly connected to an inner side wall of the housing (1). A plurality of guide columns (9) are provided on the first fixed ring (4). A first position-limiting portion and a second position-limiting portion are provided on the guide column (9). The first movable plate and the second movable plate are sleeved on the guide column (9). A first elastic support element (12) is sleeved on the guide column (9) between the second position-limiting portion (11) and the first movable plate (2), and a second elastic support element (13) is sleeved on the guide column (9) between the first fixed ring (4) and the second movable plate (3). Both a first flow guide plate and a second flow guide plate are fixedly connected to the first fixed ring (4). The first movable plate (2), the second movable plate (3), the first flow guide plate (5), and the second flow guide plate (6) define a mixing space (14). A urea nozzle (7) is provided on a side wall of the housing corresponding to the mixing space (14). The adaptive urea mixer adapts to a change in a flow rate of exhaust gas so as to automatically remove internal crystals, thereby preventing the crystals from blocking the urea mixer.