Outlet mechanism with pulsatile splash

An outlet mechanism for producing a pulsating splash, the outlet mechanism comprising a main waterway including

• an inlet waterway,
• two branch waterways, outlet directions of outlet ends of the two branch waterways intersecting, the two branch waterways being communicated with an outlet end of the inlet waterway and arranged symmetrically with respect to the inlet waterway,
• two back-flow waterways being arranged symmetrically with respect to the inlet waterway, first ends of the two back-flow waterways being communicated with the two branch waterways and second ends of the two back-flow waterways being communicated with an inlet end of the inlet waterway, and
• two vortex cavities being arranged at a left side and a right side of the inlet waterway to enhance a flowing ability of fluid, the vortex cavities being arranged at the inlet waterway and near the outlet end of the inlet waterway, the vortex cavities being arranged in grooves at the left and right sides of the inlet waterway in a concaving manner, and the grooves being arranged to be globular, of which openings are smaller than a globular diameter at a portion away from the openings, the vortex cavities only having outlets at the openings so that fluid in the vortex cavities only leaves the vortex cavities directly into the inlet waterway and the branch waterways.