The utility model discloses a
humidifier water adding structure, a humidifier and a
breathing machine, and relates to the technical field of
humidifier water adding. The water adding structure comprises a water adding
bottle, a liquid separating needle
nozzle, a waterproof breathable film, a humidifier body, a water adding
pipe, an air inlet
pipe and a
water level limiting structure. The liquid distribution needle
nozzle is installed on a
bottle opening of the water adding
bottle, a water outlet channel and an air
inlet channel which are independent of each other are arranged in the liquid distribution needle
nozzle, the water outlet channel and the air
inlet channel are communicated with the water adding bottle, a water inlet and an air outlet hole are formed in the humidifier body, one end of the water adding
pipe is communicated with the water outlet channel, and the other end of the water adding pipe is communicated with the water inlet. One end of the air inlet pipe is communicated with the air
inlet channel, the other end of the air inlet pipe is communicated with the air outlet, the
water level limiting structure is arranged in the humidifier body and communicated with the air outlet, and a distance is reserved between the end, away from the air outlet, of the
water level limiting structure and the inner bottom face of the humidifier body. According to the humidifier, water can be added into the humidifier body more accurately according to the air pressure principle, and therefore the experience feeling of a user can be improved.