Patent ID: 6624400
Filing Date: 2003-09-23
Classification: G07C

Abstract:
A microwave oven comprising:a power supply for supplying a power; a key manipulating portion for inputting a time for cooking foodstuff placed in a cooking chamber of the microwave oven; a high frequency generating portion for generating a high frequency microwave for cooking the foodstuff; a door for opening and closing the cooking chamber; a door switch for detecting opening and closing of the door; a life time detecting portion having a high frequency generation detecting portion and a door opening/closing detecting portion, the high frequency generation detecting portion connected to the high frequency generating portion for detecting a driving time of high frequency generating components of the high frequency generating portion, the door opening/closing detecting portion connected to the door switch for detecting opening and closing of the door; a microcomputer for counting and accumulating at least one of the driving time and a frequency of door opening and closing detected by the life time detecting portion; a memory for storing the accumulated driving time and the frequency of door opening and closing; and a display portion for displaying the stored driving time and the frequency of door opening and closing.