Home Appliances Design Happy Water Humidifier by Mingxi Li Happy Water is a humidifier for indoor use. The switch is a magnetic ball that floats above the body, so the humidifier is turned on by placing the ball in position. A current sensor detects the change in the magnetic circuit and creates the on and off signals. Water is turned into mist by ultrasonic atomization, and a built-in ultraviolet lamp disinfects the water. The tank holds 4 liters and can work for about ten hours. The form is based on water and the moon, two elements of traditional Chinese culture.