US-20260129793-A1 - CLOSED-LOOP LIQUID COOLER WITH PIN-FINS

Abstract

A closed-loop liquid cooler with pin-fins is provided, which includes a first external cover, a second cover, a plurality of water holes, a liquid channel, and a plurality of pin-fins. The water holes are formed on at least one of the first external cover and the second external cover. The liquid channel is formed between the first external cover and the second external cover, and is in spatial communication with the water holes. The pin-fins are located in the liquid channel. At least a portion of the pin-fins are copper fins made by copper or copper alloy. At least another portion of the pin-fins are aluminum fins made by aluminum or aluminum alloy. At least one of diameters, inscribed circle diameters, width, spacing, heights, shapes and draft angles of the copper fins and the aluminum fins are different.

Inventors

• CHING-MING YANG
• Kuo-Wei Lee
• Tze-Yang Yeh
• Ming-Hsuan Chang

Assignees

• AMULAIRE THERMAL TECHNOLOGY, INC.

Dates

Publication Date

20260507

Application Date

20241104

Claims (10)

1. 1 . A closed-loop liquid cooler with pin-fins, comprising: a first external cover; a second external cover; a plurality of water holes; a liquid channel; and a plurality of pin-fins; wherein the water holes are formed on at least one of the first external cover and the second external cover, the liquid channel is formed between the first external cover and the second external cover, and is in spatial communication with the water holes; wherein the pin-fins are located in the liquid channel, at least a portion of the pin-fins are copper fins made from copper or copper alloy, and at least another portion of the pin-fins are aluminum fins made from aluminum or aluminum alloy; wherein at least one of following properties of the copper fins and the aluminum fins is different: diameter, inscribed circle diameter, width, spacing, height, shapes and draft angle.
2. 2 . The closed-loop liquid cooler according to claim 1 , wherein a ratio of the height of the copper fin to the diameter, diagonal length, inscribed circle diameter, width, or minor circle diameter of the copper fin is configured to be between 1.5 to 12.
3. 3 . The closed-loop liquid cooler according to claim 2 , wherein a value of the diameter, diagonal length, inscribed circle diameter, width, or minor circle diameter of the aluminum fin is configured to be greater than 3 mm, and the height of the aluminum fin is configured to be less than 30 mm.
4. 4 . The closed-loop liquid cooler according to claim 2 , wherein a value of the diameter, diagonal length, inscribed circle diameter, width, or minor circle diameter of the copper fin is configured to be greater than or equal to 1 mm.
5. 5 . The closed-loop liquid cooler according to claim 1 , wherein a minimum distance between top ends of any two adjacent copper fins is configured to be between 0.5 to 5 mm, and a minimum distance between top ends of any two adjacent aluminum fins is configured to be greater than 3 mm.
6. 6 . The closed-loop liquid cooler according to claim 1 , wherein the aluminum fins are integrally formed on a plate body of the second external cover, and a thickness of the second external cover is greater than 3 mm.
7. 7 . The closed-loop liquid cooler according to claim 6 , wherein the aluminum fins and the second external cover are a die cast aluminum alloy component formed by die casting.
8. 8 . The closed-loop liquid cooler according to claim 1 , wherein the copper fins are integrally formed on a copper base which is coupled to the second external cover.
9. 9 . The closed-loop liquid cooler according to claim 8 , wherein the copper fins and the copper base are a forged copper alloy component formed by forging.
10. 10 . The closed-loop liquid cooler according to claim 1 , wherein the draft angle of the copper fins is greater than 0.4 degrees, and the draft angle of the aluminum fins is greater than 1.5 degrees.

Description

FIELD OF THE DISCLOSURE The present disclosure relates to a liquid cooler, and more particularly to a closed-loop liquid cooler with pin-fins. BACKGROUND OF THE DISCLOSURE Liquid coolers for automotive IGBT (insulated gate bipolar transistor) or ADAS (advanced driver assistance system) that are currently available on the market need to meet higher and higher requirements. However, the heat dissipation performance of aluminum liquid coolers is limited, and copper liquid coolers are costly and heavy, which forms a dilemma where existing liquid coolers are unable to satisfy such requirements. SUMMARY OF THE DISCLOSURE In response to the above-referenced technical inadequacy the present disclosure provides a closed-loop liquid cooler with pin-fins. In order to solve the above-mentioned problems, one of the technical aspects adopted by the present disclosure is to provide a closed-loop liquid cooler with pin-fins, which includes: a first external cover, a second external cover, a plurality of water holes, a liquid channel, and a plurality of pin-fins. The water holes are formed on at least one of the first external cover and the second external cover, the liquid channel is formed between the first external cover and the second external cover, and is in spatial communication with the water holes. The pin-fins are located in the liquid channel, at least a portion of the pin-fins are copper fins made by copper or copper alloy, and at least another portion of the pin-fins are aluminum fins made by aluminum or aluminum alloy. At least one of the following characteristics of the copper fins and the aluminum fins is different: the diameters, inscribed circle diameters, widths, spacing, heights, shapes and draft angles. In one of the possible or preferred embodiments, a ratio of the height of the copper fin to the diameter, diagonal length, inscribed circle diameter, width, or minor circle diameter of the copper fin is configured to be between 1.5 to 12. In one of the possible or preferred embodiments, a value of the diameter, diagonal length, inscribed circle diameter, width, or minor circle diameter of the aluminum fin is configured to be greater than 3 mm, and the height of the aluminum fins is configured to be less than 30 mm. In one of the possible or preferred embodiments, a value of the diameter, diagonal length, inscribed circle diameter, width, or minor circle diameter of the copper fin is configured to be greater than or equal to 1 mm. In one of the possible or preferred embodiments, a minimum distance between top ends of any two adjacent copper fins is configured to be between 0.5 to 5 mm, and a minimum distance between top ends of any two adjacent aluminum fins is configured to be greater than 3 mm. In one of the possible or preferred embodiments, the aluminum fins are integrally formed on a plate body of the second external cover, and a thickness of the second external cover is greater than 3 mm. In one of the possible or preferred embodiments, the aluminum fins and the second external cover are a die cast aluminum alloy component formed by die casting. In one of the possible or preferred embodiments, the copper fins are integrally formed on a copper base which is coupled to the second external cover. In one of the possible or preferred embodiments, the copper fins and the copper base are a forged copper alloy component formed by forging. In one of the possible or preferred embodiments, the draft angle of the copper fins is greater than 0.4 degrees, and the draft angle of the aluminum fins is greater than 1.5 degrees. These and other aspects of the present disclosure will become apparent from the following description of the embodiment taken in conjunction with the following drawings and their captions, although variations and modifications therein may be affected without departing from the spirit and scope of the novel concepts of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS The described embodiments may be better understood by reference to the following description and the accompanying drawings, in which: FIG. 1 is a schematic top view of a liquid cooler according to the present disclosure; FIG. 2 is a schematic view of an inside of the liquid cooler according to the present disclosure; FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2; FIG. 4 is a schematic top view of copper fins of the liquid cooler according to the present disclosure; FIG. 5 is another schematic top view of the copper fins of the liquid cooler according to the present disclosure; FIG. 6 is another schematic top view of the copper fins of the liquid cooler according to the present disclosure; FIG. 7 is another schematic top view of the copper fins of the liquid cooler according to the present disclosure; FIG. 8 is another schematic top view of the copper fins of the liquid cooler according to the present disclosure; FIG. 9 is a schematic top view of aluminum fins of the liquid cooler according to the pr