Water purifier

The water purifier comprises a reverse osmosis membrane device and a heating device, the reverse osmosis membrane device is made of a high-temperature-resistant material, and a water inlet of the heating device is connected with a pure water outlet of the reverse osmosis membrane device and used for heating pure water; a water outlet of the heating device is connected with a water inlet of the reverse osmosis membrane device and is used for performing high-temperature flushing on the reverse osmosis membrane device by using the heated pure water. The reverse osmosis membrane device is subjected to high-temperature flushing through heated pure water, high-temperature sterilization is utilized, secondary pollution is avoided, the sterilization effect is remarkable, drinking water health is fully guaranteed, meanwhile, normal-temperature water, boiled water and hot water at different temperatures can be discharged, the structure is simple, the heating efficiency is high, and use by a user is facilitated. 本发明公开了一