Patent ID: 6308939
Filing Date: 2001-10-30
Classification: F24F,Y10S

Abstract:
A method for indicating the need to refill a water supply to a room humidifier of the type having, an exhaust air stream that is of a predetermined humidity value during normal operation and below the predetermined humidity value when said supply of water is depleted, said method comprising:placing a humidity sensor in said exhaust air stream to sense the humidity thereof:providing an indicating device in a position that is visible from outside of said humidifier, said indicating device having at least a first condition for indicating normal operation and at least a second condition for indicating that said water supply is depleted, said indicating device further being controlled by said humidity sensor such that said sensor causes said indicator to be in said first condition when said sensor senses that said air stream is of or above the predetermined humidity and to be in said second condition when said sensor senses that said air stream is below the predetermined humidity value.