# US 12,114,467 B2 · Heatsink with increased air flow

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- Number: US 12,114,467 B2
- Document ID: US12114467B2
- Status: Granted
- Kind: B2
- Application number: 17/871,660
- Filed: 2022-07-22
- Published: 2022-11-10
- Granted: 2024-10-08
- Earliest claimed: 2020-01-24
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Magnus Kallmark; Fredrik Ohlsson; Vadim Tsoi; Reine Granstrom
- Web page: https://patentgrep.com/patent/US12114467B2

## CPC

- H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing}
- H10W 40/226: {characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461)}
- H10W 40/43: by flowing gases, e.g. forced air cooling
- F28F 2215/04: Assemblies of fins having different features, e.g. with different fin densities
- H05K 7/20127: {Natural convection}
- H05K 7/20509: {Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

The invention relates to a heatsink for transferring heat from one or more electrical devices to a heat transfer medium. The heatsink includes a plurality of fins arranged on a frontside of the heatsink. The plurality of fins includes a first group of fins extending in a first planar direction and a second group of fins extending in a second planar direction angled in relation to the first planar direction. For example, the first group of fins may extend from the bottom to the top of the heatsink, while the second group of fins may extend from the first group of fins to the sides of the heatsink. In this way, the sides of the heatsink can be used as air outlets and the airflow through the heatsink can be increased.

## Claims

### Claim 1

A heatsink attachable or attached to one or more electrical devices for transferring heat from the one or more electrical devices to a heat transfer medium, the heatsink comprising a plurality of fins arranged on a frontside of the heatsink,
wherein the frontside is bordered by a top end, a bottom end, a first side edge and a second side edge;
wherein the plurality of fins comprises:
a first group of fins, and
a second group of fins;
wherein fins in the first group of fins extend in a first planar direction of the frontside; and,
wherein fins in the second group of fins extend in at least a second planar direction of the frontside that is angled in relation to the first planar direction,
wherein the second group of fins comprises:
a first subgroup of fins that extend from the first group of fins to the first side edge and the top end, and
a second subgroup of fins that extend from the first group of fins to the second side edge and the top end;
wherein the first group of fins comprises fins extending from the top end to the bottom end and arranged on the frontside in a planar direction parallel to the first side edge and the second side edge,
wherein the first group of fins further comprises a third subgroup of fins and a fourth subgroup of fins that are disposed on opposing sides of the fins extending from the top end to the bottom end,
wherein the third subgroup and the fourth subgroup each includes at least one fin that runs along one of either the first side edge and the second side edge, and
wherein the fins of the third subgroup of fins and fourth subgroup of fins only partially extend from the bottom end to an ending point before the top end.

### Claim 2 (depends on 1)

The heatsink according to claim 1, wherein the first subgroup of fins and the second subgroup of fins have a same number of fins.

### Claim 3 (depends on 1)

The heatsink according to claim 1, wherein a length of a fin in the third subgroup of fins is dependent on a distance to a side of the heatsink.

### Claim 4 (depends on 3)

The heatsink according to claim 3, wherein the length increases or decreases depending on the distance to the side of the heatsink.

### Claim 5 (depends on 1)

The heatsink according to claim 1, wherein an end of one or more fins in the first group of fins are is aligned with a corresponding one of one or more corresponding fins in the second group of fins.

### Claim 6 (depends on 5)

The heatsink according to claim 5, wherein the one or more fins in the first group of fins and the one or more corresponding fins in the second group of fins are formed as common fins.

### Claim 7 (depends on 5)

The heatsink according to claim 5, wherein there is a gap between the one or more fins in the first group of fins and the one or more corresponding fins in the second group of fins.

### Claim 8 (depends on 1)

The heatsink according to claim 1, wherein one or more fins in the first group of fins are non-aligned with one or more corresponding fins in the second group of fins.

### Claim 9 (depends on 1)

The heatsink according to claim 1, wherein the second planar direction is angled in relation to the first planar direction with an angle having a value within a range from 0 to 90 degrees.

### Claim 10

A cooling device comprising:
a heatsink attachable or attached to one or more electrical devices for transferring heat from the one or more electrical devices to a heat transfer medium, the heatsink comprising a plurality of fins arranged on a frontside of the heatsink,
wherein the frontside is bordered by a top end, a bottom end, a first side edge and a second side edge;
wherein the plurality of fins comprises:
a first group of fins, and
a second group of fins;
wherein fins in the first group of fins extend in a first planar direction of the frontside,
wherein fins in the second group of fins extend in at least a second planar direction of the frontside that is angled in relation to the first planar direction,
wherein the second group of fins comprises:
a first subgroup of fins that extend from the first group of fins to the first side edge and the top end, and
a second subgroup of fins that extend from the first group of fins to the second side edge and the top end;
wherein the first group of fins comprises fins extending from the top end to the bottom end and arranged on the frontside in a planar direction parallel to the first side edge and the second side edge,
wherein the first group of fins further comprises a third subgroup of fins and a fourth subgroup of fins that are disposed on opposing sides of the fins extending from the top end to the bottom end,
wherein the third subgroup and the fourth subgroup each includes at least one fin that runs along one of either the first side edge and the second side edge,
wherein the fins of the third subgroup of fins and fourth subgroup of fins only partially extend from the bottom end to an ending point before the top end; and the one or more electrical devices attached at a backside of the heatsink.

### Claim 11 (depends on 10)

The cooling device of claim 10, wherein the first subgroup of fins and the second subgroup of fins have a same number of fins.

### Claim 12 (depends on 10)

The cooling device of claim 10, wherein a length of a fin in the third subgroup of fins is dependent on a distance to a side of the heatsink.

### Claim 13 (depends on 12)

The cooling device of claim 12, wherein the length increases or decreases depending on the distance to the side of the heatsink.

### Claim 14 (depends on 10)

The cooling device of claim 10, wherein an end of one or more fins in the first group of fins is aligned with a corresponding one of one or more corresponding fins in the second group of fins.

### Claim 15 (depends on 14)

The cooling device of claim 14, wherein the one or more fins in the first group of fins and the one or more corresponding fins in the second group of fins are formed as common fins.

### Claim 16 (depends on 14)

The cooling device of claim 14, wherein there is a gap between the one or more fins in the first group of fins and the one or more corresponding fins in the second group of fins.

### Claim 17 (depends on 10)

The cooling device of claim 10, wherein one or more fins in the first group of fins are non-aligned with one or more corresponding fins in the second group of fins.

### Claim 18 (depends on 10)

The cooling device of claim 10, wherein the second planar direction is angled in relation to the first planar direction with an angle having a value within a range from 0 to 90 degrees.