Refrigerator and control method therefor

Abstract

A refrigerator according the present disclosure includes a first tray configured to form a portion of an ice making cell, a second tray configured to form another portion of the ice making cell and capable of moving relative to the first tray, a driver configured to move the second tray, a temperature sensor configured to sense the temperature of water or ice in the ice making cell, and a controller configured to control the driver, in which when it is determined that the water in the ice making cell is in a supercooled state based on the temperature measured by the tray temperature sensor, the controller may operate the driver to move the second tray.

What is claimed is: 
     
         1 . An ice maker comprising:
 a tray configured to form at least a portion of a cell that is a space in which a liquid is phase-changed into ice; and   a tray cover coupled to the tray,   wherein the tray includes a first portion that defines at least a portion of the cell and a second portion extended from a predetermined point of the first portion,   wherein the second portion includes a first extension part extending from a first point of the first portion and a second extension part extending from a second point of the first portion,   wherein the tray cover includes:   a first wall having a portion provided to surround the first extension part, and   a second wall having a portion provided to surround the second extension part, and   wherein a first height of the portion of the first wall is different from a second height of the portion of the second wall.   
     
     
         2 . The ice maker of  claim 1 , wherein the first height of the portion of first wall is greater than the second height of the portion of the second wall. 
     
     
         3 . The ice maker of  claim 2 , wherein the second extension part includes a curved surface. 
     
     
         4 . The ice maker of  claim 1 , wherein the first extension part and the second extension part extend in different directions. 
     
     
         5 . The ice maker of  claim 1 , wherein the first extension part and the second extension part are provided in an asymmetrical shape with respect to a central line of the cell. 
     
     
         6 . The ice maker of  claim 1 , wherein the tray comprises:
 a first tray configured to form a portion of the cell, and   a second tray configured to form another portion of the cell,   wherein the second tray comprises the first portion and the second portion.   
     
     
         7 . The ice maker of  claim 6 , wherein the portion of the cell and the other portion of the cell are arranged in a first direction, and
 wherein each of the first height and the second height is a length in the first direction.   
     
     
         8 . The ice maker of  claim 6 , wherein in a state in which the first tray is in contact with the second tray, at least a portion of the tray cover is configured to surround the first tray. 
     
     
         9 . The ice maker of  claim 8 , wherein in a state in which the first tray is in contact with the second tray, the first wall is configured to surround the first tray. 
     
     
         10 . The ice maker of  claim 8 , wherein in a state in which the first tray is in contact with the second tray, the second wall is configured to surround the first tray. 
     
     
         11 . The ice maker of  claim 6 , wherein in a state in which the first tray is in contact with the second tray, at least a portion of the first wall is spaced apart from the first tray. 
     
     
         12 . The ice maker of  claim 6 , wherein in a state in which the first tray is in contact with the second tray, at least a portion of the second wall is spaced apart from the first tray. 
     
     
         13 . The ice maker of  claim 6 , further comprising a tray supporter coupled to the second tray. 
     
     
         14 . The ice maker of  claim 13 , wherein the tray supporter includes an accommodation space to accommodate the first portion of the second tray. 
     
     
         15 . The ice maker of  claim 6 , further comprising a first tray cover coupled to the first tray. 
     
     
         16 . A refrigerator comprising:
 a cabinet having a compartment;   a door that opens and closes the compartment; and   the ice maker of  claim 1 .   
     
     
         17 . An ice maker comprising:
 a tray configured to form at least a portion of a cell that is a space in which a liquid is phase-changed into ice; and   a tray cover coupled to the tray,   wherein the tray includes a first portion that defines at least a portion of the cell and a second portion extended from a predetermined point of the first portion,   wherein the second portion includes a first extension part extending from a first point of the first portion and a second extension part extending from a second point of the first portion,   wherein the tray cover includes:   a first wall having a portion provided to surround the first extension part, and   a second wall having a portion provided to surround the second extension part, and   wherein a curvature of the portion of the first wall is different from a curvature of the portion of the second wall.   
     
     
         18 . The ice maker of  claim 17 , wherein the curvature of the portion of first wall is less than the curvature of the portion of the second wall. 
     
     
         19 . The ice maker of  claim 18 , wherein the second extension part includes a curved surface. 
     
     
         20 . A refrigerator comprising:
 a cabinet having a compartment;   a door that opens and closes the compartment; and   the ice maker of  claim 17 .