Air inlet channel of air purifier and air purifier

The air purifier is provided with a purification cavity and the air inlet channel, the air inlet channel is an S-shaped curve, the ventilation sectional area of the air inlet channel is smaller than that of the purification cavity, and a sedimentation water curtain spray head is arranged at an air inlet of the air inlet channel. The air inlet channel is vertically arranged at the air inlet port of the purification cavity, an air inlet at the upper end is communicated with the fan, and an air outlet at the lower end is communicated with the air inlet port of the purification cavity. The S-shaped bend can effectively prevent water mist generated in the purification cavity from spreading to the fan along the air inlet channel. And a water layer can be formed on the upper wall surface of the air inlet channel through the settling water curtain nozzle to adsorb large-particle dust, and meanwhile, a water curtain is formed at the air inlet port to play a role in blocking water mist in the purification cavity. In ad