Heat exchanger device using a two-phase active fluid, and a method of manufacturing such a device

a heat exchanger and active fluid technology, applied in the direction of power cables, lighting and heating apparatus, laminated elements, etc., can solve the problems of large volume occupied by cylindrical rods themselves, large volume is occupied by cylindrical rods, and rigidity, and achieves low cost, facilitate interconnection ducts, and great freedom of design

a heat exchanger and active fluid technology, applied in the direction of power cables, lighting and heating apparatus, laminated elements, etc., can solve the problems of large volume occupied by cylindrical rods themselves, large volume is occupied by cylindrical rods, and rigidity, and achieves low cost, facilitate interconnection ducts, and great freedom of design

US20050022978A1Inactive Publication Date: 2005-02-03ATMOSTAT ETUD & RECH
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  • Heat exchanger device using a two-phase active fluid, and a method of manufacturing such a device
  • Heat exchanger device using a two-phase active fluid, and a method of manufacturing such a device
  • Heat exchanger device using a two-phase active fluid, and a method of manufacturing such a device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

Preferably, but in non-limiting manner, a device of the invention can be made using the method illustrated in FIG. 1.

This method comprises a step a of etching grooves in blank sheets 1, a step b of localized deposition of a bonding material, a step c in which sheets previously prepared in steps a, and b are stacked, and an assembly step d for bonding together the set of sheets stacked in step c so as to form a heat pipe 50, for example.

A blank sheet 1 is constituted by a plate whose thickness preferably lies in the range 1.0 mm to 1 mm. By way of example, the material from which the sheets are made can be a metal. This metal can be copper, nickel, iron, aluminum, or indeed an alloy thereof, such as beryllium aluminum or stainless steel. The nature of the metal constituting the sheets depends on the active fluid used.

Several types of sheet are needed to make a heat pipe 50 of the invention. Starting from a blank sheet 1, it is possible to fabricate bottom sheets 2, intermediat...

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Abstract

A flat sheet structured thermal device using a two-phase active fluid. The device including at least a top sheet, at least two intermediary sheets, and a back sheet stacked longitudinally. Each intermediary sheet has at least one zone etched through its entire thickness to form a gas transport channel. The etched zone being longitudinally bordered by at least one groove formed on the same sheet. The at least one groove contributing to the formation of at least one capillary channel when the sheet is covered by another sheet. The capillary channel is of a section adapted to enable the liquid phase of the fluid to be pumped therein by capillary forces. The device allows fluid to pass reversibly between the capillary channel and the gas transport channel during the liquid / gas or gas / liquid transition due to temperature variations to which at least one zone of the device is subjected.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of active fluid heat exchanger devices, and more precisely to those which contain a two-phase fluid and which include capillary channels. 2. Description of the Related Art The term “two-phase” means that the fluid contained in such devices is present in the form of two phases, a liquid and a gas, in order to enable such devices to operate. The term “capillary” is used below to mean channels of section that is very small relative to their length, and above all which are suitable for producing pumping phenomena by capillarity on liquids. Two-phase fluid heat exchanger devices are already known that have capillary channels suitable for producing phenomena of capillarity on the liquid phase, and having gas transport channels in which the gas phase of the fluid is confined, the capillary channels communicating with the gas transport channels. Such devices are used either as closed-loop...

Claims

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Application Information

Patent Timeline
03 Feb 2005
Publication
US20050022978A1
IPC
F28D15/00; F28D15/02; F28D15/04; H01L23/427; H05B6/00
CPC
F28D15/0233; F28D15/046; H01L23/427; H01L2924/0002; Y10T428/24661; Y10T428/24744; Y10T428/24562; H01L2924/00
Inventors
DUVAL, JEAN