Refrigerator and control method therefor

An ice maker comprising:

• a cell in which a liquid is phase-changed into ice;
• a first tray configured to form at least a portion of a wall for providing the cell;
• a second tray configured to form at least another portion of the wall for providing the cell;
• and
• a first heater to transfer heat to the first tray so that the ice is separated from a surface of the first tray,
• wherein the first heater is capable of being turned on for ice separation after ice making is performed,
• wherein it is determined whether a first turn-off reference of the first heater is satisfied after the first heater is turned on,
• wherein the first heater is capable of being turned off when the first turn-off reference of the first heater is satisfied,
• wherein the second tray is capable of being moved,
• wherein the first heater is capable of being turned on again for additional heating for separating the ice attached to the first tray after the first heater is turned off and the second tray is moved, and
• wherein the first heater is capable of being turned off again when a second turn-off reference of the first heater is satisfied after the first heater is turned on again.

An ice maker comprising:

• a cell in which a liquid is phase-changed into ice;
• a first tray configured to form at least a portion of a wall for providing the cell;
• a second tray forming at least another portion of the wall for providing the cell;
• a first tray case coupled to the first tray;
• a first heater to transfer heat to the first tray so that the ice is separated from a surface of the first tray;
• and
• a heater case at which the first heater is installed,
• wherein the heater case is integrally formed with the first tray case,
• wherein the ice is separated from the first tray through at least two heating processes of the first heater,
• wherein the at least two heating processes of the first heater comprise:
• a first heating process performed by operating the first heater, and
• a second heating process performed by operating the first heater and performed after the first heating process,
• wherein in a state in which the first tray is in contact with the second tray, the first heating process is performed,
• wherein the second tray is capable of being moved after the first heating process, and
• wherein after the second tray is moved, the second heating process is performed.