Refrigerator and method for controlling same

A refrigerator, comprising:

• a storage chamber;
• a cooler configured to supply cold air;
• a tray configured to form a cell, which is configured to form a space in which liquid is phase-changed into ice;
• a heater configured to supply heat to the cell;
• and
• a controller configured to control the heater to operate during an ice making process according to a first heating process and a second heating process performed after the first heating process, such that:
• in the first heating process, the controller is configured to control the heater so that a heating amount of the heater varies, and
• in at least a partial section of the second heating process, the controller is configured to control the heater so that a heating amount is equal to or less than the heating amount in the first heating process,
• wherein the first heating process comprises a plurality of processes of operating the heater, and the second heating process comprises a first additional process of operating the heater,
• the controller is configured to:
• control the heater such that a heating amount of the heater in one process of the plurality of processes is less than a heating amount of the heater in a next process performed after the one process,
• control the heater such that in the first additional process the heater is operated to have a predetermined heating amount for a second predetermined time,
• control the heater such that the predetermined heating amount of the heater in the first additional process is less than the heating amount of the heater in the next process of the first heating process, and
• control the heater such that the one process is performed for a first predetermined time, and the first predetermined time is less than the second predetermined time.