Ice maker of refrigerator and method of manufacturing the same

1. An ice maker of a refrigerator, comprising:

a cooling unit configured for generating cold air;

a case mounted in a food storage space of the refrigerator or a door for shielding the food storage space, the case having defined therein a cooling space for receiving the cold air generated by the cooling unit;

an ice making assembly for making ice;

a rib unit provided at one side of the ice making assembly for improving cooling efficiency; and

a bucket arranged at one side of the ice making assembly for receiving the ice separated from the ice making assembly,

wherein the ice making assembly comprises:

an ice tray arranged in the cooling space, the ice tray having an ice making recess formed in an upper surface thereof for making ice; and

a cold air guiding unit arranged at a lower side of the ice tray for guiding the cold air supplied from the cooling unit to the lower side of the ice tray, and

wherein the rib unit comprises a plurality of cooling ribs protruding downward from a bottom surface of the ice tray while extending in a state of being rotated by a predetermined angle from a longitudinal direction of the ice tray to a lateral direction of the ice tray.

2. The ice maker according to claim 1 , wherein:

the rib unit comprises a plurality of first cooling ribs and a plurality of second cooling ribs,

two adjacent ones of the first cooling ribs are arranged on the same line, while being spaced apart from each other, in the lateral direction of the ice tray, and

any one of the second cooling ribs is located between the two adjacent first cooling ribs, located on the line in the lateral direction of the ice tray, such that the second cooling rib is spaced apart from the two adjacent first cooling ribs in the longitudinal direction of the ice tray.

3. The ice maker according to claim 2 , wherein the extension direction of the first cooling ribs is perpendicular to that of the second cooling ribs.

4. The ice maker according to claim 1 , wherein the ice making assembly further comprises a heater provided at the lower side of the ice tray in a state of being spatially separated from the cold air guiding unit for emitting heat to separate the ice from the ice making recess.

5. The ice maker according to claim 4 , wherein the heater is provided along an edge of the ice tray, and the cold air flows along a central portion of the ice tray in the longitudinal direction of the ice tray.

6. The ice maker according to claim 4 , wherein:

the heater is provided along an edge of the ice tray,

the ice maker further comprises a first heat exchange prevention wall protruding downward from the bottom surface of the ice tray while extending along the edge of the ice tray, the first heat exchange prevention wall being located more inwardly of the ice tray than the heater, and

the cold air flows inside the first heat exchange prevention wall.

7. The ice maker according to claim 6 , wherein:

the cold air guiding unit comprises a guide member spaced apart downward from the bottom surface of the ice tray for defining a cold air flow channel, along which the cold air flows, between the guide member and the bottom surface of the ice tray, and

the ice maker further comprises a pair of second heat exchange prevention walls protruding upward from an upper surface of the guide member while extending along the edge of the ice tray in the longitudinal direction of the ice tray, the second heat exchange prevention walls being spaced apart from each other in the lateral direction of the ice tray.

8. The ice maker according to claim 7 , wherein:

the heater is located outside the second heat exchange prevention walls, and

the cold air flows between the second heat exchange prevention walls.

9. The ice maker according to claim 7 , wherein:

the first heat exchange prevention wall is adjacent to the second heat exchange prevention walls, and

at least a portion of the first heat exchange prevention wall and at least a portion of each of the second heat exchange prevention walls overlap each other in the lateral direction of the ice tray.

10. A method of manufacturing an ice maker of a refrigerator, comprising:

preparing a case;

arranging a cooling unit configured for generating cold air, wherein the cooling unit comprises a compressor, a condenser, and expansion valve, and an evaporator;

arranging an ice tray having an ice making recess formed in an upper surface thereof for making ice; and

arranging a cold air guiding unit for guiding the cold air generated by the cooling unit to a lower side of the ice tray,

wherein the ice tray is provided at a bottom surface thereof with a plurality of cooling ribs protruding downward from the bottom surface of the ice tray while extending in a state of being rotated by a predetermined angle from a longitudinal direction of the ice tray to a lateral direction of the ice tray.

11. The method of claim 10 , further comprising:

wherein the plurality of cooling ribs comprises a plurality of first cooling ribs and a plurality of second cooling ribs;

arranging two adjacent ones of the first cooling ribs on the same line, while being spaced apart from each other, in the lateral direction of the ice tray; and

locating any one of the second cooling ribs between the two adjacent first cooling ribs, located on the line in the lateral direction of the ice tray, such that that the second cooling rib is spaced apart from the two adjacent first cooling ribs in the longitudinal direction of the ice tray.

12. The method of claim 11 , wherein the extension direction of the first cooling ribs is perpendicular to that of the second cooling ribs.

13. A refrigerator, comprising:

a freezer compartment located within a main body of the refrigerator;

a refrigeration compartment located within the main body of the refrigerator, wherein the freezer compartment is located below the refrigeration compartment;

a cooling unit configured for generating cold air;

a case mounted in a food storage space of the refrigerator or a door for shielding the food storage space, the case having defined therein a cooling space for receiving the cold air generated by the cooling unit;

an ice making assembly for making ice;

a rib unit provided at one side of the ice making assembly for improving cooling efficiency; and

a bucket arranged at one side of the ice making assembly for receiving the ice separated from the ice making assembly,

wherein the ice making assembly comprises:

a tray arranged in the cooling space, the ice tray having an ice making recess formed in an upper surface thereof for making ice; and

a cold air guiding unit arranged at a lower side of the ice tray for guiding the cold air supplied from the cooling unit to the lower side of the ice tray, and

wherein the rib unit comprises a plurality of cooling ribs protruding downward from a bottom surface of the ice tray while extending in a state of being rotated by a predetermined angle from a longitudinal direction of the ice tray to a lateral direction of the ice tray.

14. The refrigerator according to claim 13 , wherein:

the rib unit comprises a plurality of first cooling ribs and a plurality of second cooling ribs,

two adjacent ones of the first cooling ribs are arranged on the same line, while being spaced apart from each other, in the lateral direction of the ice tray, and

any one of the second cooling ribs is located between the two adjacent first cooling ribs, located on the line in the lateral direction of the ice tray, such that the second cooling rib is spaced apart from the two adjacent first cooling ribs in the longitudinal direction of the ice tray.

15. The refrigerator according to claim 14 , wherein the extension direction of the first cooling ribs is perpendicular to that of the second cooling ribs.

16. The refrigerator according to claim 13 , wherein the ice making assembly further comprises a heater provided at the lower side of the ice tray in a state of being spatially separated from the cold air guiding unit for emitting heat to separate the ice from the ice making recess, and wherein the heater is provided along an edge of the ice tray, and the cold air flows along a central portion of the ice tray in the longitudinal direction of the ice tray.

17. The refrigerator according to claim 16 , wherein:

the heater is provided along an edge of the ice tray,

the ice maker further comprises a first heat exchange prevention wall protruding downward from the bottom surface of the ice tray while extending along the edge of the ice tray, the first heat exchange prevention wall being located more inwardly of the ice tray than the heater, and

the cold air flows inside the first heat exchange prevention wall.

18. The refrigerator according to claim 17 , wherein:

the cold air guiding unit comprises a guide member spaced apart downward from the bottom surface of the ice tray for defining a cold air flow channel, along which the cold air flows, between the guide member and the bottom surface of the ice tray, and

the ice maker further comprises a pair of second heat exchange prevention walls protruding upward from an upper surface of the guide member while extending along the edge of the ice tray in the longitudinal direction of the ice tray, the second heat exchange prevention walls being spaced apart from each other in the lateral direction of the ice tray.

19. The refrigerator according to claim 18 , wherein:

the heater is located outside the second heat exchange prevention walls, and

the cold air flows between the second heat exchange prevention walls.

20. The refrigerator according to claim 18 , wherein:

the first heat exchange prevention wall is adjacent to the second heat exchange prevention walls, and

at least a portion of the first heat exchange prevention wall and at least a portion of each of the second heat exchange prevention walls overlap each other in the lateral direction of the ice tray.