Centrifugal water spray structure and showerhead including the same

A centrifugal water spray structure comprising:

• a chamber having a chamber axis and provided with an opening;
• a water jetting plate for jetting water into the chamber in a direction not parallel to the chamber axis, thereby creating a vortex flow in the chamber;
• and
• a rotary plug received in the chamber;
• wherein one end of the rotary plug abuts an edge of the opening of the chamber in a manner that sealing is formed between the rotary plug and the edge of the opening, and the other end of the rotary plug is a free end so that the rotary plug is able to be driven to rotate about the chamber axis by the vortex flow in the chamber, wherein a plug water passage is formed inside the rotary plug, with one end of the plug water passage communicating with the interior of the chamber and the other end of the plug water passage located at the opening and communicating with the exterior of the chamber, wherein the rotary plug comprises a weighting mass disposed at the end of the rotary plug away from the opening of the chamber, wherein the weighting mass comprises a weighting ball that is rotatable with respect to remains of the rotary plug, wherein the rotary plug comprises an elastic member which forces the weighting ball to abut an inner surface of the chamber located at an end opposite the opening, and wherein a water-passing gasket is provided between the weighting ball and the elastic member, and the water-passing gasket is provided with a water-passing hole.