A METHOD FOR CONTROLLING WATER SUPPLY IN AN AUTOMATIC ICE MAKER AND A WATERSUPPLY CONTROL DEVICE

摘要

A method for controlling water supply in an automatic ice maker comprises the steps of establishing a table for a water supply time versus a non-load current; starting a timer for measuring the water supply time after turning on a water supply motor; detecting the current in the water supply motor by using a hall sensor; turning off the water supply pump and displaying the depleted state of a water supply reservoir when the water supply motor current detected by the hall sensor is equal to or lower than the non-load current; determining a water supply time, from the table, corresponding to the detected water supply motor current, when the detected current is higher than the non-load current; and turning off the water supply motor after resetting the timer if the current time of the timer is same or more than the determined water supply time. A water supply control device comprises: a device for driving a water supply motor to operate a water supply pump according to a control signal; a hall sensor for detecting magnetic field generated by the current in the water supply motor; an amplifier for amplifying an output of the hall sensor; a display circuit for displaying the depleted status of the water supply reservoir; and a mi-com for: starting a timer after tuning on the water supply motor; outputting an amplified signal to an analog input port to detect a motor current, outputting a control signal to turn off the water supply motor and to display circuit when the non-load current is detected, whereas outputting a control signal to turn off the water supply motor after determining a water supply time corresponding to the detected current higher than the non-load current, if the current time is greater than or equal to the corresponding water supply time.