# US 12,601,550 B2 · Grooved vapor chamber capillary reflow structure

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- Number: US 12,601,550 B2
- Document ID: US12601550B2
- Status: Granted
- Kind: B2
- Application number: 18/599,207
- Filed: 2024-03-08
- Published: 2025-07-31
- Granted: 2026-04-14
- Earliest claimed: 2024-01-25
- Assignees: Taiwan Microloops Corp.
- Applicants: Taiwan Microloops Corp.
- Inventors: Chun-Hung Lin
- Web page: https://patentgrep.com/patent/US12601550B2

## CPC

- F28D 15/046: {characterised by the material or the construction of the capillary structure}
- 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)}
- F28F 3/12: Elements constructed in the shape of a hollow panel, e.g. with channels {(F28D1/02, F28D1/03 take precedence)}
- 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)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A grooved vapor chamber capillary reflow structure includes a first plate, a second plate and a capillary structure. The first plate includes an inner surface, the second plate is sealed on the inner surface of the first plate, a chamber is formed between the second plate and the first plate, the capillary structure covers the inner surface of the first plate. The chamber contains at least one evaporation area and at least one condensation area, at least one reflow path is defined on the inner surface of the first plate, formed by a groove, and extends from one evaporation area to one condensation area in the chamber. In this way, the reflow path formed by the groove under the limited thickness space in the vapor chamber improves the condensation of the liquid state working fluid and facilitates quick reflow during heat exchange.

## Claims

### Claim 1

A grooved vapor chamber capillary reflow structure, comprising:
a first plate, comprising an inner surface;
a second plate, sealed on the inner surface of the first plate to define a chamber therebetween; and
a capillary structure, covering the inner surface of the first plate;
wherein, the chamber comprises a first and a second evaporation areas, and a first and a second condensation areas defined therein, a first and a second reflow paths are disposed on the inner surface of the first plate, each of the first and the second reflow paths is defined by a plurality of grooves, and the first and the second reflow paths extend from the first and the second evaporation areas to the first and the second condensation areas in the chamber, respectively;
wherein the first and the second reflow paths are intersected or coupled with one another;
wherein the evaporation area is disposed corresponding to at least one heat source, and the first plate or the second plate is attached to the heat source at a position corresponding to the evaporation area;
wherein the condensation area comprises a fin disposed at a position of the first plate or the second plate corresponding to the condensation area.

### Claim 2 (depends on 1)

The grooved vapor chamber capillary reflow structure according to claim 1, wherein the first plate is made of copper or aluminum.

### Claim 3 (depends on 1)

The grooved vapor chamber capillary reflow structure according to claim 1, wherein the inner surface of the first plate comprise a concave shape.

### Claim 4 (depends on 1)

The grooved vapor chamber capillary reflow structure according to claim 1, wherein the second plate is made of copper or aluminum.

### Claim 5 (depends on 1)

The grooved vapor chamber capillary reflow structure according to claim 1, wherein each groove is formed by an etching manner.

### Claim 6 (depends on 1)

The grooved vapor chamber capillary reflow structure according to claim 1, wherein each groove is formed concavely downward from the inner surface.

### Claim 7 (depends on 1)

The grooved vapor chamber capillary reflow structure according to claim 1, wherein a top edge of each groove is lower than or at a same level with the inner surface.