Humidifier is a household appliance that increases room humidity. The humidifier can humidify the designated room, or it can be connected to the boiler or central air conditioning system to humidify the entire building. The development of the humidifier industry in China has a history of nearly 20 years. After years of popularization of air quality concepts, product research and development, and market cultivation, the function and role of humidifier, a relatively unfamiliar small home appliance product, has gradually been accepted.