Refrigerator

Patent metadata

Field	Value
Publication number	US-11287193-B2
Application number	US-201916295572-A
Country	US
Kind code	B2
Filing date	Mar 7, 2019
Priority date	Mar 13, 2018
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A refrigerator may include an inner casing having a storage chamber defined therein; and a thermoelectric module including a thermoelectric element for cooling the storage chamber, a cooling sink in contact with one surface of thermoelectric element, and a heat sink contacting the other surface of thermoelectric element, wherein the heat sink includes: a heat dissipation fin including a stack of a plurality of fins; a heat dissipation plate coupled to the heat dissipation fin; a heat dissipation pipe for connecting the heat dissipation plate to the heat dissipation fin, wherein the heat dissipation pipe is arranged to pass through the heat dissipation fin.

First claim

What is claimed is:

1. A refrigerator comprising:
an inner casing having a storage chamber defined therein; and
a thermoelectric module comprising (i) a thermoelectric element that is configured to cool the storage chamber, (ii) a cooling sink that is configured to contact a first surface of the thermoelectric element, and (iii) a heat sink that is configured to contact a second surface of the thermoelectric element,
wherein the heat sink of the thermoelectric module comprises:
a heat dissipation fin comprising a stack of a plurality of fins,
a heat dissipation plate that is coupled to the heat dissipation fin, and
at least one heat dissipation pipe that connects the heat dissipation plate to the heat dissipation fin and that passes through the heat dissipation fin,

wherein the heat dissipation plate has a first surface that is in contact with the at least one heat dissipation pipe,
wherein the heat dissipation plate comprises a fin-engagement portion that is disposed at a second surface of the heat dissipation plate opposite to the first surface, that extends along a stacking direction of the stack of the plurality of fins, and that is engaged with the heat dissipation fin, and
wherein at least one of the plurality of fins has an engagement groove engaged with the fin-engagement portion.

2. The refrigerator of claim 1 ,
wherein the first surface of the heat dissipation plate has at least one pipe-seated groove that receives the at least one heat dissipation pipe.

3. The refrigerator of claim 2 , wherein the heat sink of the thermoelectric module further comprises an element contacting plate that is configured to contact the thermoelectric element,
wherein the element contacting plate has at least one groove that is configured to receive the at least one heat dissipation pipe, and
wherein the element contacting plate is configured to surface-contact the first surface of the heat dissipation plate.

4. The refrigerator of claim 2 , wherein the at least one heat dissipation pipe of the heat sink of the thermoelectric module comprises a plurality of heat dissipation pipes,
wherein the plurality of heat dissipation pipes connects the heat dissipation plate to the heat dissipation fin in a state in which the plurality of heat dissipation pipes is spaced from each other.

5. The refrigerator of claim 2 , wherein the at least one heat dissipation pipe comprises:
a first pipe that is configured to contact the heat dissipation plate;
a second pipe that is configured to pass through the heat dissipation fin; and
a third pipe that has a bent shape and that is configured to connect the first pipe and the second pipe.

6. The refrigerator of claim 1 , wherein the fin-engagement portion of the heat dissipation plate comprises a first protrusion and a second protrusion that are spaced apart from each other in a direction perpendicular to the stacking direction of the stack of the plurality of fins, and
wherein the first protrusion and the second protrusion are received together in the engagement groove of the plurality of fins.

7. The refrigerator of claim 6 , wherein a width of the engagement groove of the plurality of fins is less than or equal to a maximum distance between the first protrusion and the second protrusion of the fin-engagement portion of the heat dissipation plate.

8. The refrigerator of claim 1 , wherein at least one of the plurality of fins comprises:
at least one pipe through-hole through which the at least one heat dissipation pipe is configured to pass through, and
a sleeve that is configured to extend around the at least one pipe through-hole.

9. The refrigerator of claim 8 , wherein the at least one heat dissipation pipe is configured to pass through the at least one pipe through-hole in a first direction, and
wherein the sleeve is configured to protrude in the first direction around the at least one pipe through-hole.

10. The refrigerator of claim 1 , wherein each of the plurality of fins comprises a spacer that is configured to define a spacing between the plurality of fins.

11. The refrigerator of claim 10 , wherein at least one of the plurality of fins comprises a pair of long sides and a pair of short sides, and
wherein each of the pair of long sides has a plurality of spacers that are spaced from one another.

12. The refrigerator of claim 11 , wherein the pair of long sides comprises (i) a first long side that is positioned adjacent to the heat dissipation plate, and (ii) a second long side that is positioned opposite the first long side, and
wherein a total area or a total length of second spacers formed on the second long side is smaller than a total area or a total length of first spacers formed on the first long side.

13. The refrigerator of claim 1 , wherein the refrigerator further comprises:
a fixing pin that is configured to couple to the heat dissipation fin of the heat sink of the thermoelectric module; and
a heat dissipation fan that is configured to couple to the fixing pin,
wherein at least one of the plurality of fins has a pin-engagement portion with which the fixing pin is configured to engage.

14. The refrigerator of claim 1 , wherein the heat sink and the cooling sink of the thermoelectric module are configured to be fastened with each other via a fastener, and
wherein at least two fins among the plurality of fins are spaced apart from each other in a direction intersecting the stacking direction of the stack of the plurality of fins such that the fastener is configured to be positioned in a spacing between the at least two fins.

15. The refrigerator of claim 1 , wherein the fin-engagement portion of the heat dissipation plate comprises a protrusion that protrudes to the plurality of fins, that passes through at least a portion of the plurality of fins in the stacking direction, and that is received in the engagement groove.

16. The refrigerator of claim 1 , wherein the fin-engagement portion of the heat dissipation plate is one of a plurality of fin-engagement portions that are spaced apart from one another in a direction perpendicular to the stacking direction, and
wherein each of the plurality of fin-engagement portions comprises a first protrusion and a second protrusion that are spaced apart from each other in the direction perpendicular to the stacking direction and that are received together in the engagement groove of the plurality of fins.

17. The refrigerator of claim 1 , wherein the heat dissipation plate is located between the heat dissipation fin and the at least one heat dissipation pipe, and
wherein the second surface of the heat dissipation plate is in contact with the plurality of fins.

18. The refrigerator of claim 1 , further comprising a heat dissipation fan that faces the heat dissipation fin,
wherein the heat dissipation fin is located between the heat dissipation plate and the heat dissipation fan.

19. The refrigerator of claim 1 , wherein the engagement groove is recessed from surfaces of the plurality of fins facing the second surface of the heat dissipation plate and extends along the stacking direction.

Assignees

• Lg Electronics Inc

Inventors

• Lee Woosung
• Lee Jihun

Classifications

• F28D15/04

  with tubes having a capillary structure · CPC title

• F25B2321/023

  Mounting details thereof · CPC title

• F28F2250/08

  Fluid driving means, e.g. pumps, fans · CPC title

• F25D23/003

  for cooling refrigerating machinery · CPC title

• F28D15/0275 Primary

  Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores · CPC title