Method for producing a heat pipe

Patent metadata

Field	Value
Publication number	US-11536517-B2
Application number	US-202117163653-A
Country	US
Kind code	B2
Filing date	Feb 1, 2021
Priority date	Feb 12, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A method for producing a heat pipe includes the steps: providing a pipe-shaped casing element having a length and an interior; filling a powder with particles into the casing element to form a capillary structure in the casing element; connecting the particles of the powder to one another, wherein the interior enclosed by the casing element is filled with the powder partially or in its entirety at least across a partial area of the length of the casing element, and subsequently the connection of the particles of the powder to one another and preferably also to the casing element in a layer lying against the casing element is established from the outside by inductive heat generation.

First claim

The invention claimed is:

1. A method for producing a heat pipe, the method comprising the steps:
providing a pipe-shaped casing element having a length and an interior;
filling a powder with particles into the interior of the casing element while feeding in thermal energy from the outside by inductive heat generation to connect the particles to one another and form a layer having a capillary structure formed from the particles of the powder and lying inside and against the casing element;
wherein the interior enclosed by the casing element is filled with the powder in its entirety at least across a partial area of the length of the casing element; and
removing any excess powder with loose particles from the casing element.

2. The method according to claim 1 , wherein the capillary structure formed from the powder has different wall thicknesses across the length of the capillary structure.

3. The method according to claim 2 ,
wherein the casing element provided with the powder is moved through an inductor at different speeds; or
wherein the inductor is moved along the casing element provided with the powder at different speeds; or
wherein the casing element provided with the powder is moved through the inductor at different speeds and is inductively treated at different frequencies; or
wherein the inductor is moved along the casing element provided with the powder at different speeds and the casing element provided with the powder is inductively treated at different frequencies.

4. The method according to claim 1 , wherein the casing element provided with the capillary structure is subjected to a sintering process.

5. The method according to claim 1 , wherein the particles in the powder have a diameter of between 5 μm and 1000 μm.

Assignees

• Miba Sinter Austria Gmbh

Inventors

• Pichler Philipp
• Gielesberger Franz-Josef

Classifications

• F28D15/04 Primary

  with tubes having a capillary structure · CPC title

• B23P2700/09

  Heat pipes · CPC title

• B22F7/08 Primary

  with one or more parts not made from powder {(B22F7/062 takes precedence)} · CPC title

• F28D15/046 Primary

  characterised by the material or the construction of the capillary structure · CPC title

• Y10T29/49353

  Heat pipe device making · CPC title