Self-cleaning device and a water outlet device

A self-cleaning device, comprising:

• a liquid flow chamber,
• one or more ejector pins, and
• an elastic deformation body, wherein:
• the liquid flow chamber comprises an inlet and an outlet,
• the one or more ejector pins are arranged between the inlet and the outlet,
• the elastic deformation body is disposed on the outlet,
• the elastic deformation body comprises a deformation portion and a liquid outlet portion,
• the deformation portion surrounds the liquid outlet portion,
• the liquid outlet portion comprises one or more liquid outlet holes,
• the one or more ejector pins extend toward the one or more liquid outlet holes,
• a protrusion protrudes from an inner end of the outlet,
• a shape of the protrusion corresponds to a shape of the deformation portion,
• when a liquid flows in the liquid flow chamber, the deformation portion is deformed due to hydraulic pressure to form a liquid flow space between the one or more ejector pins and the one or more liquid outlet holes, and
• when there is no hydraulic pressure in the liquid flow chamber, the deformation portion is reset to an initial state, and the one or more ejector pins are inserted into the one or more liquid outlet holes to clean the one or more liquid outlet holes.