Home Appliances Design Tern Air Purifier by Wan Kairui TERN AIR PURIFIER is designed for users living in a small apartment. It consists of three main structures—a small air purifier within a bigger air purifier, and a display screen similar to a wall clock. The display screen is usually hung on the wall of the bedroom, allowing users to understand the real-time air quality data of bedroom intuitively. When the user notices that the air quality in the bedroom has deteriorated, the smaller air purifier can be taken out from the bigger air cleaner and placed in the bedroom. The purpose of saving space and electrical power can be achieved.