Water flow generator

The water flow generator further comprises an upper cover and a lower cover which are connected in a clamped mode, an impeller is arranged in the upper cover, a plurality of obliquely-arranged water passing holes are evenly distributed in the cover face of the upper cover in the circumferential direction, obliquely-arranged blades are evenly distributed on the outer circumference of the impeller, and the axial direction of the water passing holes is consistent with the normal direction of the blades of the impeller. The circumference where the centers of the water passing holes are located is consistent with the circumference where the geometric centers of the impeller blades are located. The stator winding surrounds the rotor and is fixedly arranged in the lower cover. According to the water flow generator provided by the utility model, the inclined water passing holes are perpendicular to the inclined blades, so that the water flow direction of the water passing holes is tangent to the rotating direction of