# US 2013/0153176 A1 · Flat type heat pipe and method of manufacturing the same

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- Number: US 2013/0153176 A1
- Document ID: US20130153176A1
- Status: Published application
- Kind: A1
- Application number: 13/583,757
- Filed: 2011-08-08
- Published: 2013-06-20
- Earliest claimed: 2011-08-08
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Takahito Mizuno; Yuya Takano; Tetsuyoshi Fukaya; Eisaku Kakiuchi
- Web page: https://patentgrep.com/patent/US20130153176A1

## CPC

- F28D 15/0233: {the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence)}
- B21D 53/02: heat exchangers {or parts thereof}, e.g. radiators, condensers {fins, headers}(making finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22)
- F28D 15/0283: {Means for filling or sealing heat pipes}
- F28D 15/04: with tubes having a capillary structure
- Y10T 29/49353: Heat pipe device making
- 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)
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method of manufacturing a flat type heat pipe, having an inside of which partitioned into a plurality of cells, that is capable of flexibly setting a concentration of working fluid in each cell is provided. The method includes processes of preparing a flat container, pouring, and closing. In the preparing, the flat container having the inside of which two-dimensionally partitioned into the plurality of cells is prepared. The flat container has connecting holes through which adjacent cells communicate and an inlet hole for the working fluid to be poured from outside. In the pouring, the working fluid is poured into respective cells through the inlet hole and the connecting holes. In the closing, the inlet hole and the connecting holes are closed. In one method, after sealing a specified cell, following processes of heating, removing air, pouring, evaporating, and closing are repeated for other cells.

## Claims

### Claim 1

A method for manufacturing a flat type heat pipe, the method comprising:
preparing a flat container having an inside of which two-dimensionally partitioned into a plurality of cells, the flat container having connecting holes that communicate adjacent cells to each other and an inlet hole for a working fluid to be poured from outside;
pouring the working fluid in the respective cells through the inlet hole and the connecting holes; and
closing the inlet hole and the connecting holes.

### Claim 2 (depends on 1)

The method of claim 1, wherein following processes are repeated in the pouring and the closing:
removing air from a non-sealed cell;
pouring the working fluid into the non-sealed cell;
evaporating the poured working fluid; and
sealing a specified cell after a concentration of the working fluid in the specified cell reaches a predetermined concentration.

### Claim 3 (depends on 1)

The method of claim 1, wherein:
the pouring includes evaporating the working fluid in the cells after heating the respective cells to different temperatures; and
the closing includes closing the connecting holes after closing the inlet hole and changing concentrations of the working fluid in the respective cells in accordance with a temperature gradient of the cells.

### Claim 4 (depends on 1)

The method of claim 1, further comprising reducing a volume of at least one of the cells by applying pressure to the at least one of the cells after closing the inlet hole and the connecting holes.

### Claim 5 (depends on 1)

A flat type heat pipe manufactured by the method of claim 1.

### Claim 6

A flat type heat pipe in which a plurality of cells with different concentrations of a working fluid is two-dimensionally arranged.