# US 11,306,973 B2 · Liquid cooling heat exchanger and method for making the same

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- Number: US 11,306,973 B2
- Document ID: US11306973B2
- Status: Granted
- Kind: B2
- Application number: 16/865,702
- Filed: 2020-05-04
- Published: 2020-08-20
- Granted: 2022-04-19
- Earliest claimed: 2017-03-10
- Assignees: Cooler Master Co., Ltd.
- Applicants: Cooler Master Co., Ltd.
- Inventors: Chang-Han Tsai; Shui-Fa Tsai
- Web page: https://patentgrep.com/patent/US11306973B2

## CPC

- F28D 9/0062: {the conduits for one heat-exchange medium being formed by spaced plates with inserted elements (F28D9/0012, F28D9/0025, F28D9/0081, F28D9/04 take precedence)}
- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- F28F 3/025: {the means being corrugated, plate-like elements}
- F28F 3/12: Elements constructed in the shape of a hollow panel, e.g. with channels {(F28D1/02, F28D1/03 take precedence)}
- F28F 21/084: {from aluminium or aluminium alloys}
- F28F 21/089: {Coatings, claddings or bonding layers made from metals or metal alloys (F28F19/06 takes precedence)}
- H05K 7/20218: {using a liquid coolant without phase change in electronic enclosures (in cabinets of standardized dimensions H05K7/20536; in server cabinets H05K7/20709; in vehicle electronic casings H05K7/20845; in power control electronics H05K7/2089; in displays H05K7/20954)}
- H05K 7/20263: {Heat dissipaters releasing heat from coolant}
- H10W 40/47: by flowing liquids, e.g. forced water cooling
- F28F 2245/00: Coatings; Surface treatments
- F28F 2275/04: by brazing
- F28F 2280/06: Adapter frames, e.g. for mounting heat exchanger cores on other structure and for allowing fluidic connections
- H10W 40/226: {characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461)}
- H10W 40/228: {the projecting parts being wire-shaped or pin-shaped}
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- 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

## Abstract

The disclosure provides a liquid cooling heat exchanger, comprising a first cover plate, a second cover plate and a fin, the first cover plate and the second cover plate stacked on each other so as to form a chamber therebetween, the fin disposed within the chamber, the first cover plate made of a composite material, wherein there is a bonding layer between the first cover plate and the second cover plate, and the bonding layer has a melting point lower than melting points of the first cover plate, the second cover plate and the fin. The disclosure also relates to a method for making the liquid cooling heat exchanger.

## Claims

### Claim 1

A method for making a liquid cooling heat exchanger, comprising:
providing a first cover plate to a side of a second cover plate, wherein a chamber is formed between the first cover plate and the second cover plate;
providing a fin in the chamber, wherein the first cover plate, the second cover plate, and the fin each are made of a composite material having a base plate coated with a bonding layer having a melting point lower than a melting point of the base plate; and
melting the bonding layers of the first cover plate, the second cover plate, and the fin to form a single bonding layer between the base plates of the first cover plate and the second cover plate and a single bonding layer between the base plates of the second cover plate and the fin so as to bond the first cover plate, the second cover plate, and the fin together through a single process, wherein the bonding layer of the composite material is made of aluminum alloy with a melting point ranging between 574° C. and 599° C.

### Claim 2 (depends on 1)

The method according to claim 1, wherein there is a gap between the first cover plate and the fin.

### Claim 3 (depends on 1)

The method according to claim 1, wherein at least one of the first cover plate and the second cover plate have a central area protruding outward to form the chamber.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the first cover plate and the second cover plate each have a plurality of bores along an edge thereof.

### Claim 5 (depends on 1)

The method according to claim 1, further comprising:
providing a rivet nut made of the composite material; and
melting the bonding layer of the river nut and the first cover plate to form a single bonding layer between the base plates of the river nut and the first cover plate so as to bond the rivet nut to an edge of the first cover plate.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the first cover plate has two openings connected to the chamber.