Ice maker of refrigerator and manufacturing method for the same

• US 9,857,121 B2
• Filed: 08/27/2015
• Issued: 01/02/2018
• Est. Priority Date: 06/18/2015
• Status: Active Grant

• Current Assignee: Dongbu Daewoo Electronics Corporation
• Original Assignee: Dongbu Daewoo Electronics Corporation
• Inventors: Yang, Sung Jin
• Primary Examiner(s): Jones, Melvin
• Application Number:
  US14/837,630
• Publication Number:
  US 20160370090A1
• Time in Patent Office: 859 Days
• Field of Search: 62340, 62344
• CPC Class Codes: F25C 1/24 for refrigerators, e.g. freezing trays
• CPC Class Codes: F25C 2305/0221 rotating ice mould
• CPC Class Codes: F25C 5/06 by deforming bodies with which the ice is in contact, e.g. using inflatable members
• CPC Class Codes: F25C 5/08 by heating bodies in contact with the ice
• CPC Class Codes: F25C 5/182 Ice bins therefor
• CPC Class Codes: F25C 5/22 particularly adapted for household refrigerators
• CPC Class Codes: F25D 17/065 with compartments at different temperatures
• CPC Class Codes: F25D 2317/061 through special compartments

Abstract

An ice maker includes a cooling unit for generating cold air; a case defining a cooling space for receiving the cold air; an ice making assembly for making ice; and a bucket for receiving the ice. The ice making assembly includes an ice tray; and a cold air guiding unit for guiding the cold air to the lower side of the ice tray. A guide member of the guiding unit defines a flow channel, along which the cold air flows, between the guide member and the bottom surface of the tray. The guide member includes a first inclined section extending in a longitudinal direction of the ice tray for guiding the cold air to the bottom surface of the tray. An imaginary extension line of the first inclined section reaches between two of the ice making recesses adjacent to each other in the longitudinal direction of the ice tray.

Claims

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 configured for shielding the food storage space, the case having defined therein a cooling space configured for receiving the cold air generated by the cooling unit;

an ice making assembly configured for making ice; and

a bucket arranged at one side of the ice making assembly configured 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 a plurality of ice making recesses formed in an upper surface thereof configured for making ice; and

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

wherein the cold air guiding unit comprises a guide member spaced apart downward from a bottom surface of the ice tray, the cold air guiding unit configured for defining a cold air flow channel, along which the cold air flows, between the guide member and the bottom surface of the tray, the guide member comprising a first inclined section extending, while being inclined upward, in a longitudinal direction of the ice tray for guiding the cold air to the bottom surface of the tray,

wherein an imaginary extension line of the first inclined section reaches between two of the ice making recesses that are adjacent to each other in the longitudinal direction of the tray, and

wherein the guide member further comprises a second inclined section extending, while being inclined downward from a highest point of the first inclined section, in the longitudinal direction of the ice tray.

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

the first inclined section comprises at least two first inclined sections provided in the longitudinal direction of the tray,

the number of the ice making recesses is at least four, and

an imaginary extension line of one of the at least two first inclined sections reaches between two of the at least four ice making recesses that are adjacent to each other, and an imaginary extension line of another of the at least two first inclined sections reaches between other two of the at least four ice making recesses that are adjacent to each other.

3. 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, wherein the heater is spatially separated from the guide unit, wherein the heater is configured for emitting heat to separate the ice from the ice making recesses.

4. The ice maker according to claim 3, 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.

5. The ice maker according to claim 3, wherein:

the heater is provided along an edge of the 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 away from the heater.

6. The ice maker according to claim 5, further comprising 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 a lateral direction of the ice tray.

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

the heater is located outside the second heat exchange prevention walls away from the cold air flow channel, and

the cold air flows between the second heat exchange prevention walls in the cold air flow channel.

8. The ice maker according to claim 6, 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.

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

preparing a case;

arranging a cooling unit configured for generating cold air;

arranging an ice tray having a plurality of ice making recesses formed in an upper surface thereof, the ice tray configured for making ice; and

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

wherein the cold air guiding unit comprises a guide member spaced apart downward from a bottom surface of the ice tray, and the cold air guiding unit is configured 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, the guide member comprising a first inclined section extending, while being inclined upward, in a longitudinal direction of the tray for guiding the cold air to the bottom surface of the ice tray,

wherein an imaginary extension line of the first inclined section reaches between two of the ice making recesses that are adjacent to each other in the longitudinal direction of the tray, and

wherein the guide member further comprises a second inclined section extending, while being inclined downward from a highest point of the first inclined section, in the longitudinal direction of the ice tray.

10. The method of claim 9, further comprising:

arranging a heater at the lower side of the ice tray, wherein the heater is spatially separated from the guide unit, wherein the heater is configured for emitting heat to separate the ice from the ice making recesses.

11. The method of claim 10, further comprising:

providing the heater along an edge of the ice tray, wherein the cold air flows along a central portion of the tray in the longitudinal direction of the tray.

12. The method of claim 10, further comprising:

providing the heater along an edge of the ice tray; and

arranging a first heat exchange prevention wall protruding downward from the bottom surface of the ice tray, wherein the first heat exchange prevention wall is located more inwardly in relation to the ice tray than the heater;

wherein the cold air flows inside the first exchange prevention wall away from the heater.

13. The method of claim 12, further comprising:

arranging 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 a lateral direction of the ice tray.

14. The method of claim 13, further comprising:

arranging the first heat exchange prevention wall adjacent to the second heat exchange prevention walls, wherein 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.

15. A refrigerator, comprising:

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

a refrigeration chamber located within the main body of the refrigerator;

a cooling unit configured for generating cold air;

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

an ice making assembly configured for making ice; and

a bucket arranged at one side of the ice making assembly configured 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 a plurality of ice making recesses formed in an upper surface thereof configured for making ice; and

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

the cold air guiding unit comprising a guide member spaced apart downward from a bottom surface of the ice tray, the cold air guiding unit configured for defining a cold air flow channel, along which the cold air flows, between the guide member and the bottom surface of the tray, the guide member comprising a first inclined section extending, while being inclined upward, in a longitudinal direction of the ice tray for guiding the cold air to the bottom surface of the tray,

wherein an imaginary extension line of the first inclined section reaches between two of the ice making recesses that are adjacent to each other in the longitudinal direction of the tray, and

wherein the guide member further comprises a second inclined section extending, while being inclined downward from a highest point of the first inclined section, in the longitudinal direction of the ice tray.

16. The refrigerator of claim 15, wherein:

the first inclined section comprises at least two first inclined sections provided in the longitudinal direction of the tray,

the number of the ice making recesses is at least four, and

an imaginary extension line of one of the at least two first inclined sections reaches between two of the at least four ice making recesses that are adjacent to each other, and an imaginary extension line of another of the at least two first inclined sections reaches between other two of the at least four ice making recesses that are adjacent to each other.

17. The refrigerator of claim 15, wherein the ice making assembly further comprises a heater provided at the lower side of the ice tray, wherein the heater is spatially separated from the guide unit, wherein the heater is configured for emitting heat to separate the ice from the ice making recesses.

18. The refrigerator of claim 17,

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

wherein 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

wherein the cold air flows inside the first heat exchange prevention wall away from the heater;

and

further comprising 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 a lateral direction of the ice tray.