| 摘要 |
<p>AN ICE MAKER (10) IS DISPOSED IN AN ICE MAKING CHAMBER (4) OF A REFRIGERATOR/FREEZER (1). THE ICE MAKER INCLUDES AN ICE TRAY (20) FOR MAKING ICE USING COLD AIR BLOWING INTO THE ICE MAKING CHAMBER, A THERMISTOR (25) THAT MEASURES TEMPERATURE IN THE ICE TRAY, A HEATER (31) THAT HEATS THE ICE TRAY FROM BELOW, AND A CONTROL UNIT (50) THAT CONTROLS FREEZING CYCLE OPERATION AND POWER SUPPLY TO THE HEATER BASED ON TEMPERATURE MEASURED BY THE THERMISTOR. AFTER SUPPLYING WATER TO THE ICE TRAY, THE CONTROL UNIT PERFORMS A FREEZING PREPARATION STEP OF SUPPLYING POWER OF THE ?PREHEATING? TO THE HEATER UNTIL THE TEMPERATURE MEASURED BY THE THERMISTOR DROPS BELOW THE FREEZING POINT, AN ICE MELTING STEP OF SUPPLYING POWER OF THE ?RAPID HEATING? TO THE HEATER FOR A PREDETERMINED TIME PERIOD AFTER THE TEMPERATURE MEASURED BY THE THERMISTOR DROPS BELOW THE FREEZING POINT, AND A FREEZING PROGRESSION STEP OF SUPPLYING POWER OF THE ?NORMAL HEATING? TO THE HEATER UNTIL THE TEMPERATURE MEASURED BY THE THERMISTOR DROPS TO A PREDETERMINED TEMPERATURE. (FIG. 8)</p> |
