Heat sink with condensing fins and phase change material

• US 10,641,556 B1
• Filed: 04/26/2019
• Issued: 05/05/2020
• Est. Priority Date: 04/26/2019
• Status: Active Grant

• Current Assignee: United Arab Emirates University (Al Hikma Development Co. PJSC)
• Original Assignee: United Arab Emirates University (Al Hikma Development Co. PJSC)
• Inventors: Al Omari, Salah Addin Burhan
• Primary Examiner(s): Ruppert, Eric S
• Application Number:
  US16/396,104
• Time in Patent Office: 375 Days
• CPC Class Codes: F28D 15/02 in which the medium condenses and evaporates, e.g. heat pipes heat pipes used in solar heat collectors F24S10/95; in radiators F28D1/0226; in nuclear reactors G21C15/257
• CPC Class Codes: F28D 15/0233 the conduits having a particular shape, e.g. non-circular cross-section, annular F28D15/0241, F28D15/0266 take precedence
• CPC Class Codes: F28D 15/025 having non-capillary condensate return means
• CPC Class Codes: F28D 15/0266 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers F28D15/043 takes precedence
• CPC Class Codes: F28D 15/0275 Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• CPC Class Codes: F28D 15/046 characterised by the material or the construction of the capillary structure
• CPC Class Codes: F28D 20/025 the latent heat storage material being in direct contact with a heat-exchange medium or with another heat storage material F28D20/003 takes precedence
• CPC Class Codes: F28D 2021/0029 Heat sinks
• CPC Class Codes: F28F 2215/06 Hollow fins; fins with internal circuits
• CPC Class Codes: H01L 23/427 Cooling by change of state, e.g. use of heat pipes by liquefied gas H01L23/445
• CPC Class Codes: H01L 23/4275 by melting or evaporation of solids
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

The heat sink with condensing fins and phase change material is formed from a thermally conductive housing, an internal chamber, and a body of liquid phase change material. The thermally conductive housing has a first wall and an opposed second wall and forms an internal chamber. The first wall of the thermally conductive housing is adapted to be in direct contact with one or more heat sources. The body of liquid phase change material is disposed within the internal chamber. The second wall of the thermally conductive housing is adapted to form a plurality of condensing fins. The plurality of condensing fins may contain at least one high thermal conductivity rod. In some embodiments, a high thermal conductivity medium, such as gallium, is disposed within the internal chamber in direct contact with the first wall of the thermally conductive housing.

Claims

1. A heat sink with condensing fins and phase change material, comprising:

a thermally conductive housing, the thermally conductive housing forming an internal chamber, the thermally conductive housing having a first wall and an opposed second wall;

at least one heat source in contact with the first wall of the thermally conductive housing;

a thermal conductivity medium disposed within the internal chamber and in direct contact with the first wall of the thermally conductive housing;

a body of liquid phase change material disposed within the internal chamber and in direct contact with the thermal conductivity medium;

the second wall of the thermally conductive housing being configured to form a plurality of spaced apart condensing fins;

a plurality of thermal conductivity rods, each of the plurality of thermal conductivity rods having a first end and an opposed second end, the first end of each of the plurality of thermal conductivity rods being disposed in the thermal conductivity medium and spaced from the first wall of the thermally conductive housing and the second end of the each of the plurality of thermal conductivity rods extending into a respective one of the plurality of spaced apart condensing fins; and

a plurality of thermally conductive side beams, each of the plurality of side beams having a first end and an opposed second end, each of the plurality of thermally conductive side beams being attached to at least a respective second end of each of the plurality of thermal conductivity rods.

2. The heat sink with condensing fins and phase change material according to claim 1, further comprising an encapsulated phase change material disposed within the thermal conductivity medium, wherein the encapsulated phase change material is encapsulated in a material capable of expansion and contraction.

3. A heat sink with condensing fins and phase change material according to claim 1, further comprising a thermally conductive component disposed within a portion of the internal chamber.

4. A heat sink with condensing fins and phase change material according to claim 3, wherein the thermally conductive component is selected from the group consisting of a thermally conductive foam, a thermally conductive matrix, a thermally conductive grid, and a thermally conductive mesh.

5. A heat sink with condensing fins and phase change material according to claim 1, wherein:

the second end of each of the plurality of side beams being attached to the second wall of the thermally conductive housing.

6. The heat sink with condensing fins and phase change material according to claim 1, wherein the second end of each of the plurality of side beams extends through the second wall of the thermally conductive housing.

7. The heat sink with condensing fins and phase change material according to claim 6, further comprising an internal chamber within each of the plurality of thermal conductivity rods, each of the internal chambers within each of the plurality of thermal conductivity rods extending from the first end of each of the plurality of thermal conductivity rods to the second end of each of the plurality of thermal conductivity rods;

wherein the internal chamber allows vapor to rise from the first end of each of the plurality of thermal conductivity rods to the second end of each of the plurality of thermal conductivity rods.

8. The heat sink with condensing fins and phase change material according to claim 7, further comprising at least one access point in each of the plurality of thermal conductivity rods, wherein each of the at least one access points places each of the internal chambers of each of the plurality of thermal conductivity rods in open fluid communication with the body of liquid phase change material.

9. The heat sink with condensing fins and phase change material according to claim 8, further comprising wherein the at least one access point in each of the plurality of thermal conductivity rods provides a vapor jet disposed in the portion of the plurality of thermal conductivity rods extending into one of the plurality of condensing fins.

10. The heat sink with condensing fins and phase change material according to claim 1, further comprising an insulating material lining a portion of an outer surface of at least the second end at least one of each of the thermal conductivity rods.

11. The heat sink with condensing fins and phase change material according to claim 1, further comprising an insulating material lining an outer surface of at least the second end of each of the plurality of side beams.

12. A heat sink with condensing fins and phase change material, comprising:

a thermally conductive housing, the thermally conductive housing forming at least one internal chamber, the thermally conductive housing having a first wall and an opposed second wall, and the opposed second wall being configured to form a plurality of spaced apart condensing fins;

at least one heat source in contact with the first wall of the thermally conductive housing;

a body of liquid phase change material disposed within the at least one internal chamber;

a plurality of thermal conductivity rods, each of the plurality of thermal conductivity rods having a first end and an opposed second end, the second end of each of the plurality of thermal conductivity rods extending into a respective one of the plurality of condensing fins, an insulating material lining a portion of an outer surface of a respective second end of each of the plurality of thermal conductivity rods; and

a plurality of side beams, the plurality of side beams each having a first end and an opposed second end, the first end of each of the plurality of side beams being affixed to a respective one of the plurality of thermal conductivity rods and the second end of each of the plurality of side beams being disposed in direct contact with the portion of the thermally conductive housing forming the opposed second wall.

13. The heat sink with condensing fins and phase change material according to claim 12, wherein the first end of each of the plurality of thermal conductivity rods is disposed in the body of liquid phase change material.