Refrigerator and method for controlling the same

Abstract

According to an embodiment of the present disclosure, a method for controlling a refrigerator, the refrigerator including an ice mater including a first tray and a second try provided in a storage space and coupled to each other to define a ice chamber and a driving part that rotates the second tray, a first heater provided in the first tray to heat the first tray, a second heater provided in the second tray to heat the second tray, and an ejector provided below the second tray to press an external portion of the second tray to separate ice from the second tray when the second tray is rotated for ice separation, and a controller that controls operation of the ice maker, the method including starting ice making by supplying water to the ice chamber; heating the second tray by turning on the second heater during ice making; heating the first tray by turning on the first heater for ice separation after completion of ice making; and heating the second tray by turning on the second heater for ice separation.

1 . A method for controlling a refrigerator having an ice maker that includes a first tray and a second tray provided in a storage space and rotatably coupled to each other, the first and second trays being configured to come together to define a ice chamber, a driving part that is configured to rotate the second tray, a first heater provided in and configured to heat the first tray, a second heater provided in and configured to heat the second tray, an ejector provided below the second tray and configured to press an external portion of the second tray to separate ice from the second tray when the second tray is rotated for ice separation, and a controller configured to control an operation of the ice maker, the method comprising,
 starting ice making by supplying water to the ice chamber;   heating the second tray by turning on the second heater during ice making;   heating the first tray by turning on the first heater for ice separation after completion of ice making; and   heating the second tray by turning on the second heater for ice separation.   
     
     
         2 . The method of  claim 1 , wherein the second heater is turned on after the first heater is turned on for ice separation after the completion of ice making. 
     
     
         3 . The method of  claim 2 , wherein, after the first heater is turned on, the second heater is turned on based on a temperature detected by a temperature sensor for detecting a temperature of the ice chamber reaching a first reference temperature within a first reference period of time. 
     
     
         4 . The method of  claim 2 , wherein, after the first heater is turned on, the second heater is turned on based on a temperature detected by a temperature sensor for detecting a temperature of the ice chamber reaching a first reference temperature. 
     
     
         5 . The method of  claim 2 , wherein, after the first heater is turned on, the second heater is turned on based on a time that has elapsed after one of the first heater or the second heater is turned on reaching a first reference time. 
     
     
         6 . The method of  claim 2 , further comprising:
 simultaneously or sequentially turning off the first heater and the second heater.   
     
     
         7 . The method of  claim 6 , further comprising:
 simultaneously or sequentially turning off the first heater and the second heater based on a time that has elapsed after the second heater is turned on reaching a set time.   
     
     
         8 . The method of  claim 6 , further comprising:
 simultaneously or sequentially turning off the first heater and the second heater based on a temperature detected by a temperature sensor reaching an OFF reference temperature within a set time after the second heater is turned on.   
     
     
         9 . The method of  claim 6 , further comprising:
 simultaneously or sequentially turning off the first heater and the second heater based on a temperature detected by a temperature sensor reaching an OFF reference temperature after the second heater is turned on.   
     
     
         10 . The method of  claim 1 , further comprising:
 operating the driving part to start rotating the second tray based on the first heater and the second heater being turned off.   
     
     
         11 . The method of  claim 10 , further comprising:
 operating the driving part after operating one of the first heater or the second heater for a predetermined time based on a change in signal not being detected within a set time in a position detection sensor while the driving part is operating.   
     
     
         12 . The method of  claim 11 , further comprising:
 determining, by the controller, whether the second tray has reached an initial position for ice making within the predetermined time; and   repeatedly performing control operations to operate the driving part such that one of the first heater or the second heater is operated and the second tray is moved to the initial position based on determining that the second tray has reached an initial position for ice making within the predetermined time.   
     
     
         13 . The method of  claim 12 , further comprising:
 outputting, by the controller, an error signal through an output unit based on a number of repetitions of the controller reaching a reference number.   
     
     
         14 . The method of  claim 10 , wherein the ice maker includes a full ice detection device configured to detect whether an ice bin is full of ice, and
 wherein the starting to rotate the second tray further includes detecting whether the ice bin is full of ice through the full ice detection device.   
     
     
         15 . A refrigerator comprising:
 a cabinet that defines a storage space;   an ice maker provided inside the storage space and configured to make ice through supply of cold air; and   a controller configured to control an operation of the ice maker,   wherein the ice maker includes:
 a first tray defining an upper portion of an ice chamber in which ice is produced; 
 a second tray defining a lower portion of the ice chamber and made of a deformable material; 
 a driving part configured to rotate the second tray; 
 a first heater provided at the first tray and configured to heat the first tray based on being turned on during ice separation; 
 a second heater provided at the first second tray and configured to heat the second tray based on being turned on during ice making, and 
 an ejector provided below the second tray and configured to separate ice from the second tray by pressing the second tray that is rotated for ice separation, 
 wherein the second heater is configured to be turned on during ice separation to heat the second try. 
   
     
     
         16 . The refrigerator of  claim 15 , wherein the second heater is configured to be turned on after the first heater is turned on for ice separation after ice making has been completed. 
     
     
         17 . The refrigerator of  claim 16 , wherein the first heater and the second heater are configured to be simultaneously or sequentially turned off based on a time that has elapsed after the second heater is turned reaching a set time. 
     
     
         18 . The refrigerator of  claim 15 , wherein the controller is configured to, based on a change in signal not being detected within a set time in a position detection sensor while the driving part is operating, operate the driving part such that the second tray is moved to an initial position after operating the second heater for a reference time. 
     
     
         19 . The refrigerator of  claim 18 , wherein the controller is configured to:
 determine whether the second tray has reached an initial position within a predetermined time, and   repeatedly perform control to operate the driving part such that the second heater is operated for the reference time and the second tray is moved to the initial position based on the controller determining that the second tray has reached an initial position for ice making within the predetermined time.   
     
     
         20 . The refrigerator of  claim 15 , wherein the second tray is located below the first tray,
 wherein the first heater is in contact with the second tray, and   wherein the second heater is in contact with the first tray.