The refrigerator according to the present invention comprises: a storage compartment for storing food; a cooler for supplying cold to the storage compartment; a first tray assembly forming a part of ice-making cells which are where water changes phase to ice due to the cold; a second tray assembly forming the other part of the ice-making cells; a heater located adjacently to the first tray assembly and/or the second tray assembly; and a control unit for controlling the heater. Any one of the first and second tray assemblies has a greater degree of cold transfer than the other tray assembly.

A refrigerator according to the present disclosure includes a storage chamber configured to store food, a cooler configured to supply cold to the storage chamber, a first temperature sensor configured to sense the temperature in the storage chamber, a first tray configured to form a portion of an ice making cell that is a space in which water is phase-changed into ice by the cold, a second tray configured to form another portion of the ice making cell, a water supply part configured to supply water to the ice making cell, a second temperature sensor configured to sense the temperature of water or ice in the ice making cell, a heater configured to be positioned adjacent to at least one of the first tray and the second tray, and a controller configured to control the heater, in which the controller controls the degree of supercooling of water to be reduced in at least one or more of a first section from the completion of a preparation step for water supply until the start of the water supply, a second section from the start of the water supply until the completion of the water supply, and a third sections from the start of the ice making process before the ice making process is completed.

A refrigerator according to the present disclosure includes a storage chamber configured to store food, a cooler configured to supply cold to the storage chamber, a first temperature sensor configured to sense the temperature in the storage chamber, a first tray configured to form a portion of an ice making cell that is a space in which water is phase-changed into ice by the cold, a second tray configured to form another portion of the ice making cell, a water supply part configured to supply water to the ice making cell, a second temperature sensor configured to sense the temperature of water or ice in the ice making cell, a heater configured to be positioned adjacent to at least one of the first tray and the second tray, and a controller configured to control the heater, in which the controller controls the degree of supercooling of water to be reduced in at least one or more of a first section from the completion of a preparation step for water supply until the start of the water supply, a second section from the start of the water supply until the completion of the water supply, and a third sections from the start of the ice making process before the ice making process is completed.

A refrigerator includes a cabinet having a freezing compartment, an ice-maker disposed in the freezing compartment to make spherical ice, an ice bin disposed below the ice-maker for storing ice removed from the ice-maker, and an ice tray disposed inside the ice bin. At least a portion of a bottom face of the ice tray is spaced apart from a bottom face of the ice bin, and a plurality of tray holes are defined to pass through the bottom face of the ice tray.

A refrigerator includes a cabinet having a freezing compartment, an ice-maker disposed in the freezing compartment to make spherical ice, an ice bin disposed below the ice-maker for storing ice removed from the ice-maker, and an ice tray disposed inside the ice bin. At least a portion of a bottom face of the ice tray is spaced apart from a bottom face of the ice bin, and a plurality of tray holes are defined to pass through the bottom face of the ice tray.

An ice maker, according to the present invention, comprises: a first tray forming a part of an ice-making cell; a second tray forming another part the ice-making cell; and a heater which is disposed so as to be adjacent to the first or the second tray, wherein the heater turns on during a period when cold air is being supplied to the ice-making cell, and the output of the on heater can vary.

An ice maker, according to the present invention, comprises: a first tray forming a part of an ice-making cell; a second tray forming another part the ice-making cell; and a heater which is disposed so as to be adjacent to the first or the second tray, wherein the heater turns on during a period when cold air is being supplied to the ice-making cell, and the output of the on heater can vary.

A refrigerator includes a first tray forming a part of an ice-making cell in which water undergoes a phase change to ice due to the cool air, a second tray forming another part of the ice-making cell and in contact with the first tray during an ice-making process, a water supply to supply water to the ice-making cell, a heater which is adjacent to at least one of the first tray or the second tray; and a controller to control the heater. The second tray is moveable with respect to the first tray, and the controller is configured to control a movement of the second tray.

A refrigerator includes a first tray forming a part of an ice-making cell in which water undergoes a phase change to ice due to the cool air, a second tray forming another part of the ice-making cell and in contact with the first tray during an ice-making process, a water supply to supply water to the ice-making cell, a heater which is adjacent to at least one of the first tray or the second tray; and a controller to control the heater. The second tray is moveable with respect to the first tray, and the controller is configured to control a movement of the second tray.

A refrigerator of the present disclosure turns on a heater, which supplies heat to an ice making cell, in at least partial section while a cooler supplies cold to the ice making cell so that bubbles dissolved in the water within the ice making cell moves from a portion, at which the ice is made, toward the water that is in a liquid state to make transparent ice. A defrosting process may be performed when a defrosting start condition is satisfied in a state in which the heater is turned on. In this case, the amount of cold supply of the cooler in the defrosting process can be reduced more than the amount of cold supply of the cooler before the defrosting start condition is satisfied.