Heat sink

• US 7,304,847 B2
• Filed: 04/26/2006
• Issued: 12/04/2007
• Est. Priority Date: 02/10/2006
• Status: Expired due to Fees

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: Meng, Jin-Gong, Hwang, Ching-Bai
• Primary Examiner(s): Chervinsky; Boris
• Assistant Examiner(s): SMITH, COURTNEY L
• Application Number:
  US11/308,728
• Publication Number:
  US 20070188992A1
• Time in Patent Office: 587 Days
• Field of Search: 361/690, 361/691, 361/697, 361/700, 361/709, 165/80.3, 165/104.33, 165/104.26, 165/152.122, 165/185, 257/E23.099, 257/E23.088
• US Class Current: 361/700
• 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 2021/0029 Heat sinks
• CPC Class Codes: F28D 2021/0031 Radiators for recooling a coolant of cooling systems
• CPC Class Codes: F28F 1/30 the means being attachable to the element F28F1/32 takes precedence
• CPC Class Codes: F28F 13/06 by affecting the pattern of flow of the heat-exchange media F28F13/003 takes precedence; static flow control means in header boxes F28F9/026
• CPC Class Codes: F28F 2250/08 Fluid driving means, e.g. pumps, fans

Abstract

A heat sink includes a plurality of fins parallel to each other, and one heat pipe extending through these fins. A flow channel is formed between each pair of neighboring fins for channeling an airflow generated by an electric fan. A guiding member having a curved shape is arranged around the through hole for guiding the airflow flowing to the heat pipe. A space formed and surrounded by the guiding member is a tapered space, which narrows gradually along the direction of the airflow so as to guide the airflow flowing to the heat pipe.

Claims

1. A heat sink comprising:

a plurality of parallel fins with a flow channel formed between any of two neighboring fins for an airflow flowing therethough;

a heat pipe extending through the fins; and

a guiding member having a curved shape being arranged in the channel around the heat pipe for guiding the airflow flowing adjacent to the heat pipe;

wherein the guiding member is formed on a face of each the fins and a concave hollow corresponding to the guiding member is formed at an opposite surface of each of the fins.

2. The heat sink of claim 1, wherein a tapered space is formed on a surface of each of the fins defined by the guiding member and the space decreases gradually along the flowing direction of the airflow, the heat pipe being located in the space.

3. The heat sink of claim 2, further comprising a cooling fan being located at a side of the fins for generating the airflow.

4. The heat sink of claim 2, wherein the guiding member is arranged symmetrically to the heat pipe.

5. The heat sink of claim 2, wherein the guiding member has a parabola shape.

6. The heat sink of claim 2, further comprising an additional guiding member, an additional tapered space being formed on the surface of each of the fins between the guiding member, and the additional guiding member.

7. A heat sink comprising:

a heat pipe; and

a plurality of parallel fins stacked along the heat pipe, a flow channel being formed between each of two neighboring fins for an airflow flowing therethough, wherein at least one curved guiding member is extruded from each fin for guiding the airflow toward the heat pipe;

wherein the guiding member has a parabola shape which has a central axis extending through the heat pipe;

a distance between the guiding member and the axis decreases gradually along the flowing directions of the airflow;

two guiding members are separately arranged in each fin, and a tapered space is formed between the two guiding members and decreases gradually along the flowing direction of the airflow.

8. The heat sink of claim 7, wherein one through hole is defined in each of the fins for the heat pipe extending through, and the guiding member is symmetrically arranged around the heat pipe.

9. A heat sink comprising:

a plurality of fins stacked together, each fin defining a hole, a flange extending from a first face of the each fin around the hole, and a first guiding member protruding from the first face and around the flange; and

a heat pipe extending through the hole and thermally connecting with the flange the first guiding member has a diverged side and a converged side, an airflow flowing first through the diverged side of the guiding member, the flange and then the converged side;

wherein the first guiding member defines a tapered space and the flange is located in the spaced space.

10. The heat sink of claim 9, wherein the first guiding member has a parabola shape and an axis of the first guiding member extends through the heat pipe.

11. The heat sink of claim 10 further comprising a second guiding member protruding from the first face of the each fin, the first guiding member being located between the flange and the second guiding member.

12. The heat sink of claim 11, wherein the first and second guiding member forms concaves on a second face of the each fin opposite the first face thereof.

13. The heat sink of claim 11, wherein the second guiding member is curved and is symmetrical to the axis of the first guiding member.

14. The heat sink of claim 13, wherein the second guiding member has a curvature larger than that of the first guiding member.

15. The heat sink of claim 12, wherein the second guiding member is curved and is symmetrical to the axis of the guiding member.