Parks, airports, subway stations, high-speed railway stations and other public places, due to the characteristics of large crowds gathering and dispersing, water purifier water production and extreme heating function have a severe test. On the basis of ensuring the filtering effect of safety and health, the design and installation of the equipment take into account the safety risks in the public environment, and the convenience and comfort of users of different ages and heights, and even the subsequent cleaning and maintenance should be carefully considered.