Water flosser with unidirectional sealing device

A water flosser with a unidirectional sealing device, comprising:

• a shell, wherein a water storage chamber and a liquid outlet communicated to the water storage chamber are provided inside the shell, and the liquid outlet is arranged at a bottom of the water storage chamber;
• the shell downwards extends along an edge of the liquid outlet to form a first abutment block;
• a protruding second abutment block is arranged in the shell;
• the second abutment block is arranged towards the first abutment block;
• and
• a second check valve, wherein the second check valve is provided with an abutment board;
• the first abutment block abuts against an upper surface of the abutment board, and the second abutment block abuts against a lower surface of the abutment board, to limit the second check valve between the first abutment block and the second abutment block;
• and the second check valve is configured to allow oral rinse to unidirectionally flow into the water storage chamber along the liquid outlet.