Plate-type heat pipe

Inactive Publication Date: 2011-04-28
HON HAI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]Generally, plate-type heat pipes efficiently dissipate heat from heat-generating components such as a central processing unit (CPU) of a computer. A conventional plate-type heat pipe comprises a top plate and a bottom cover hermetically contacting the top plate to form a container. A wick structure is adhered to an inner surface of the bottom cover. Working fluid is contained in the container. All parts of the wick structure have the same thickness. When the bottom cover of the plate-type heat pipe absorbs heat of the heat-generating component, the working fluid is vaporized to absorb heat of the bottom cover.

Problems solved by technology

In addition, if the pores of the wick structure are too small, the vaporized working fluid also tends to be retarded by the wick structure.
What working fluid there is in the wick structure may absorb the heat of the bottom cover too slowly, whereby heat is accumulated on the bottom cover.
In due course, the plate-type heat pipe may overheat, and the heat dissipation efficiency of the plate-type heat pipe is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0013]Referring to FIGS. 1-2, a plate-type heat pipe in accordance with the present disclosure is shown. The plate-type heat pipe includes a hermetic container 10, a continuous wick structure 30 mounted on an inner surface of the container 10, and working fluid (not shown) contained in the container 10.

[0014]The container 10 is made of copper, aluminum, or an alloy thereof, and includes an elongated condensing plate 11 and a bowl-shaped evaporating plate 13 hermetically contacting the condensing plate 11. The evaporating plate 13 absorbs heat generated by one or more components (not shown) such as electronic devices. The condensing plate 11 dissipates heat, transferred from the evaporating plate 13, to the ambient environment.

[0015]The evaporating plate 13 includes an elongated heat absorbing portion 131, two transition portions 133, two extending portions 134 and two sidewalls 135. The transition portions 133 extend upwardly and outwardly from opposite lateral edges of the heat abs...

second embodiment

[0020]Referring to FIG. 4, this shows part of a heat absorbing portion arrangement of a plate-type heat pipe in accordance with the present disclosure. A first wick portion 331 and a plurality of auxiliary wick portions 332 are adhered to an inner surface of a heat absorbing portion 131. In the illustrated embodiment, the auxiliary wick portions 332 fill bottom ends of the through holes 3313, respectively. Bottom end surfaces of the auxiliary wick portions 332 and a bottom surface of the first wick portion 331 are coplanar with one another, and contact the inner surface of the heat absorbing portion 131. Each of the auxiliary wick portions 332 has a same thickness and is much thinner than the first wick portion 331. For example, each auxiliary wick portion 332 is less than half the thickness of the first wick portion 331.

[0021]Because the auxiliary wick portions 332 are thinner than the first wick portion 331, heat transfer paths of the working fluid in the heat absorbing portion 13...

third embodiment

[0022]Referring to FIG. 5, this shows part of a heat absorbing portion arrangement of a plate-type heat pipe in accordance with the present disclosure. A first wick portion 331 and a number of auxiliary wick portions 334 are adhered to an inner surface of a heat absorbing portion 131. A cross-section of each of the auxiliary wick portions 334 is a trapezoid. Each auxiliary wick portion 334 has a smaller end, and a larger end opposite to the smaller end. The smaller ends of the auxiliary wick portions 334 are all oriented toward the same direction. In this embodiment, a top side of each auxiliary wick portion 334 is aslant, and a bottom side of each auxiliary wick portion 334 is horizontal and adhered to the inner surface of the heat absorbing portion 131. The larger ends of the auxiliary wick portions 334 are all thinner than the first wick portion 331.

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Abstract

An exemplary plate-type heat pipe includes a condensing plate, an evaporating plate and a first wick portion. The evaporating plate cooperates with the condensing plate to define a hermetic container. Working fluid is contained in the container. The first wick portion is formed on an inner surface of the evaporating plate. The first wick portion defines through holes therein.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure relates to heat pipes and, more particularly, to a plate-type heat pipe having good heat dissipation efficiency and stable and reliable performance.[0003]2. Description of Related Art[0004]Generally, plate-type heat pipes efficiently dissipate heat from heat-generating components such as a central processing unit (CPU) of a computer. A conventional plate-type heat pipe comprises a top plate and a bottom cover hermetically contacting the top plate to form a container. A wick structure is adhered to an inner surface of the bottom cover. Working fluid is contained in the container. All parts of the wick structure have the same thickness. When the bottom cover of the plate-type heat pipe absorbs heat of the heat-generating component, the working fluid is vaporized to absorb heat of the bottom cover.[0005]If the wick structure is too thick, a part of the vaporized working fluid is retarded by the wick structure when the vapor...

Claims

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Application Information

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IPC IPC(8): F28D15/02
CPCF28D15/046F28D15/0233
InventorHOU, CHUEN-SHU
OwnerHON HAI PRECISION IND CO LTD