Patent ID: 6137091
Filing Date: 2000-10-24
Classification: F24C,H01H,H05B

Abstract:
An electric cooker comprising:a plurality of heaters;a plurality of relays for controlling said heaters, each relay having a contact point;a deposition detector for detecting deposition on the contact point;a zero volt detector for detecting a zero potential of a power source;a heat adjuster for adjusting heat of said heaters;a controller for controlling said relay based on a signal from said heat adjuster and changing a control signal of said relay to a short pulse signal based on a signal detecting the deposition; andwherein said controller controls said respective contact points based on a signal from said zero volt detector for practicing ON/OFF of the contact point near zero potential of the power source, and said controller controls the ON/OFF position of the contact point according to alternative changes of a transition point from/to a positive area to/from a negative area of the power source.