Waterproof airway structure and oral health care appliance

The utility model discloses a waterproof air channel structure which comprises a hollow main body channel, a one-way valve is arranged at the air outlet end of the main body channel, a water blocking groove is formed between the air inlet end of the main body channel and the air outlet end of the main body channel, and when the pressure of the outward end of the one-way valve is smaller than that of the inward end of the one-way valve, air can pass through the water blocking groove. A one-way valve is arranged. The air channel structure is connected with the machine body, the water tank is connected with the machine body, one end of the water inlet and outlet pipe is connected with the water tank, and the other end of the water inlet and outlet pipe can be communicated with the output end of the main body channel, so that the oral health-care appliance with the waterproof air channel is formed. 本实用新型公开了一种防水气道结构，包括中空的主体通道，主体通道的出气端设有单向阀，主体通道的进气端与主体通道的出气端之间设有阻水槽，当单向阀向外一端的压力小于单向阀向内一端的压力时，空气能够经过阻水槽，通过单向阀。又通过设置机体、水