HEAT PIPE AND METHOD FOR MANUFACTURING THE SAME

Abstract

A heat pipe includes a pipe containing phase changeable working media therein. A wick structure is located on an inner face of the pipe. A space is surrounded by the wick structure in the pipe. At least one muzzle with an inlet and an outlet is positioned inside the pipe; the inlet and the outlet are deferent in radius thereof.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present apparatus and method can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present apparatus and method. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a longitudinal cross-sectional view of a heat pipe in accordance with a first embodiment of the present invention;

FIG. 2 is a flow chart of manufacturing the heat pipe in accordance with the first embodiment of the present invention;

FIG. 3 is a longitudinal cross-sectional view of a heat pipe in accordance with a second embodiment of the present invention; and

FIG. 4 is a longitudinal cross-sectional view of a heat pipe in accordance with a third embodiment of the present invention.

Claims

1. A heat pipe comprising: a pipe containing phase changeable working media therein, the working media being phase changeable between liquid and vapor, a wick structure being located on an inner face of the pipe, a space being surrounded by the wick structure in the pipe, at least one muzzle with an inlet and an outlet being positioned in space of the pipe, the inlet and the outlet being different in radius thereof, the space being for pass of the vapor in the heat pipe from one end to another end of the heat pipe.

2. The heat pipe of claim 1, wherein the pipe defines an evaporating section from where heat can be input and a condensing section from where the heat can be output, the inlet of the at least one muzzle extending toward the evaporating section and the outlet of the at least one muzzle extending toward the condensing section.

3. The heat pipe of claim 2, wherein the outlet of the at least one muzzle has a radius thereof smaller than that of the inlet.

4. The heat pipe of claim 3, wherein the pipe has an adiabatic section located between the evaporating section and the condensing section.

5. The heat pipe of claim 4, wherein the at least one muzzle is located adjacent to a joint of the evaporating section and the adiabatic section.

6. The heat pipe of claim 5, wherein the pipe has a circular cross section.

7. The heat pipe of claim 5, wherein the pipe is elongated, and wherein the evaporating section and the condensing section are at two corresponding ends of the pipe.

8. The heat pipe of claim 5, wherein the pipe is elongated and defines two condensing sections at two corresponding ends thereof, wherein the evaporating section is at a middle portion of the pipe, two adiabatic sections connecting corresponding condensing sections and the evaporating section.

9. The heat pipe of claim 5, wherein the pipe is U-shaped and defines two condensing sections substantially parallel to each other, wherein the evaporating section is perpendicular to the two condensing sections, with two arced adiabatic sections connecting corresponding condensing sections and the evaporating section.

10. A method of manufacturing a heat pipe, comprising steps: providing a pipe;coaxially inserting a mandrel into the pipe, at least one muzzle being fitted on the mandrel, the at least one muzzle having two open ends with different sizes;inserting wick structure making material into a space between the mandrel and the pipe;sintering the wick structure making material into the pipe;drawing the mandrel out of the pipe, leaving the at least one muzzle inside a space defined in the wick structure of the pipe, filling working media into the pipe, vacuuming and sealing the pipe.

11. The method of manufacturing a heat pipe of claim 10, wherein the at least one muzzle is coaxially worn on the mandrel.

12. The method of manufacturing a heat pipe of claim 11, wherein the at least one muzzle is located adjacent to an end of the mandrel.

13. The method of manufacturing a heat pipe of claim 11, wherein the pipe has an evaporating section for receiving heat, and wherein one of the two open ends of the at least one muzzle which has a larger size is oriented toward the evaporating section.

14. A heat pipe comprising: a pipe having an evaporating section for receiving heat and a condensing section for releasing the heat;a vapor passage defined in the heat pipe for pass of vapor from the evaporating section to the condensing section; anda muffle mounted in the vapor passage and having an inlet and an outlet, wherein the inlet has a size larger than that of the out let, and wherein the vapor flows from the evaporating section, the inlet and then the outlet to reach the condensing section.

15. The heat pipe of claim 14, wherein the evaporating section is located at a middle portion of the pipe and the condensing section is located at two opposite ends of the pipe.

16. The heat pipe of claim 15, wherein the pipe has a U-shaped configuration.