CN217283907U

CN217283907U - High-power pulsating heat pipe heat conduction structure

Info

Publication number: CN217283907U
Application number: CN202221095118.3U
Authority: CN
Inventors: 林辉; 程东辉; 王岩斌; 戴建平
Original assignee: Henan Enthalpy Control Electronic Technology Co ltd
Current assignee: Henan Enthalpy Control Electronic Technology Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-08-23
Anticipated expiration: 2032-05-09

Abstract

The utility model discloses a high-power pulsation heat pipe heat conduction structure, include: the pulsating heat pipes are arranged at intervals in the width direction, are of a snake-shaped loop structure which is connected end to end and is closed, and are filled with pulsating heat pipe working media, the upper parts of the pulsating heat pipes are condensation ends, and the lower parts of the pulsating heat pipes are evaporation ends; the top surface of the base plate is provided with a plurality of first groove bodies and second groove bodies which are arranged at intervals, and the lower parts of the pulsating heat pipes are embedded into the first groove bodies of the base plate in a one-to-one correspondence manner; the heat dissipation module is composed of a plurality of heat dissipation fin modules, and the plurality of heat dissipation fin modules are fixed in the second groove body; the radiating fin module is positioned between two adjacent pulsating heat pipes, and the radiating fins are formed by arranging short fin groups and long fin groups at intervals. The utility model provides a problem that pulsating heat pipe heat transfer area is little, and the radiating efficiency is low.

Description

High-power pulsating heat pipe heat conduction structure

Technical Field

The utility model relates to a heat exchange field. More specifically, the utility model relates to a high-power pulsation heat pipe heat conduction structure.

Background

Pulsating heat pipes are a very potential cooler for electronic devices proposed in the 90 s of the 20 th century. Compared with the traditional heat pipe, the heat pipe has the biggest characteristics of simple structure, no core, arbitrary bending of shape, large equivalent heat transfer coefficient and small volume. Pulsating heat pipes are miniaturized and low cost heat transfer elements. The pulsating heat pipe has small pipe diameter, generally 0.5-3mm inside diameter, and is made of metal capillary bent into snake structure with one end of the elbow being heating end and the other end being condensing end and heat insulating section in the middle. The interior is vacuumized and filled with a part of working liquid, and the working liquid forms liquid columns and air plugs with different lengths in the pipe under the action of surface tension. The working fluid is water, methanol, ethanol, Freon, etc. Although the heat transfer coefficient of the pulsating heat pipe is large, the heat exchange area is small, the heat dissipation capacity of a high-power chip is large, and the heat dissipation requirement of the conventional pulsating heat pipe heat dissipation structure cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-power pulsation heat pipe heat conduction structure has solved that pulsation heat pipe heat transfer area is little, problem that the radiating efficiency is low.

The utility model provides a technical scheme that this technical problem adopted is: a high-power pulsating heat pipe heat conduction structure comprises:

the pulsating heat pipes are arranged at intervals in the width direction, are of a snake-shaped loop structure which is connected end to end and is closed, and are filled with pulsating heat pipe working media, the upper parts of the pulsating heat pipes are condensation ends, and the lower parts of the pulsating heat pipes are evaporation ends;

the top surface of the base plate is provided with a plurality of first groove bodies and second groove bodies which are arranged at intervals, and the lower parts of the pulsating heat pipes are embedded into the first groove bodies of the base plate in a one-to-one correspondence manner;

the heat dissipation module is composed of a plurality of heat dissipation fin modules, and the plurality of heat dissipation fin modules are fixed in the second groove body; the radiating fin module is positioned between two adjacent pulsating heat pipes, the radiating fins are formed by short fin groups and long fin groups at intervals, the short fin groups are opposite to the convex parts of the pulsating heat pipe serpentine circuit, and the long fin groups are opposite to the concave parts of the pulsating heat pipe serpentine circuit.

Preferably, the heat sink fin module has a top plate, one side of the top plate length edge is provided with a first ear plate, the other side of the top plate length edge is provided with a second ear plate, the first ear plate and the second ear plate are arranged as follows: the first lug plate and the second lug plate of two adjacent radiating fin modules are fixed through bolts; the heat dissipation module is provided with a plurality of heat dissipation fans.

Preferably, the inner diameter of the pulsating heat pipe is 1-2 mm.

Preferably, one side of the pulsating heat pipe is provided with a flushing port.

Preferably, the heat dissipation fan is fixed to a top plate of the heat dissipation fin module by a bracket.

The utility model discloses at least, include following beneficial effect: the heat absorbed by the pulsating heat pipe at the evaporation end is conducted to the condensation end and the heat dissipation module for heat dissipation, and the problems of small heat exchange area and low heat dissipation efficiency of the pulsating heat pipe are solved by arranging the large surface area of the heat dissipation module. The heat dissipation module is composed of a plurality of heat dissipation fin modules, the number of the heat dissipation fin modules can be selected according to the number of the pulsating heat pipes, the heat dissipation fin modules are assembled into a whole, and the heat dissipation fin modules can be flexibly adjusted according to a heat source. The radiating fin module is formed by arranging the short fin group and the long fin group at intervals, so that the radiating efficiency is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic view of a heat conducting structure of a high-power pulsating heat pipe according to an embodiment of the present invention;

fig. 2 is a top view of a heat conducting structure of a high power pulsating heat pipe according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a heat dissipation module and a heat dissipation fan according to an embodiment of the present invention.

Description of reference numerals: the heat radiating structure comprises a pulsating heat pipe 1, a base plate 2, a top plate 3, a short fin group 4, a long fin group 5, a first lug plate 6, a second lug plate 7 and a cooling fan 8.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Before the present invention is described with reference to the accompanying drawings, it is to be noted that: the technical solutions and features provided in the various parts of the present invention, including the following description, may be combined with each other without conflict.

Moreover, references to embodiments of the invention in the following description are generally only to be considered as examples of the invention, and not as all embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by a person having ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The present invention will be further described in detail with reference to the accompanying drawings and embodiments, and the specific implementation process is as follows:

as shown in fig. 1-3, the utility model provides a high-power pulsating heat pipe heat conduction structure, include:

the pulsating heat pipes 1 are arranged at intervals in the width direction, the pulsating heat pipes 1 are of a snake-shaped loop structure which is connected end to end and closed, working media of the pulsating heat pipes 1 are filled in the pulsating heat pipes 1, the working media of the pulsating heat pipes 1 are deionized water, ethanol aqueous solution and methanol aqueous solution, the upper parts of the pulsating heat pipes 1 are condensation ends, and the lower parts of the pulsating heat pipes 1 are evaporation ends;

the top surface of the base plate 2 is provided with a plurality of first groove bodies and second groove bodies which are arranged at intervals, the lower parts of the pulsating heat pipes 1 are embedded into the first groove bodies of the base plate 2 in a one-to-one correspondence manner, and the bottom surface of the base plate 2 is fixed with a heat source piece to be cooled, so that the heat dissipation of the heat source piece is realized;

the heat dissipation module is composed of a plurality of heat dissipation fin modules, the plurality of heat dissipation fin modules are fixed in the second tank body, and the heat dissipation fin modules and the second tank body can be fixed in a reinforced mode in a brazing mode; the radiating fin module is located between two adjacent pulsating heat pipes 1, the radiating fins are formed by arranging short fin groups 4 and long fin groups 5 at intervals, the short fin groups 4 are opposite to the convex parts of the snake-shaped loops of the pulsating heat pipes 1, and the long fin groups 5 are opposite to the concave parts of the snake-shaped loops of the pulsating heat pipes 1.

In the embodiment, the high-power pulsating heat pipe heat conducting structure provides potential possibility for miniaturization and high heat flux density heat dissipation, the pulsating heat pipe is divided into a three-step method, the upper section and the lower section are respectively a condensation end and an evaporation end, the middle section is a heat insulation section, the working mechanism is that the interior of the pulsating heat pipe is vacuumized and then filled with a certain volume of working medium, the medium spontaneously forms liquid plugs and vapor plugs which are different in length and randomly distributed in the pipe under the action of surface tension and gravity, and when a thermal load is loaded at the evaporation end of the pulsating heat pipe, a fluid medium in the vacuum-sealed pipe is heated and vaporized to generate gas through a phase change reaction. Along with the heating process of the evaporation end, the volume of the bubbles gradually expands, and the pressure of the evaporation end rises; when the condensation end of the pulsating heat pipe is loaded with a cold load, the gas medium is liquefied by cooling, and a phase change reaction is carried out to generate liquid. Along with the progress of condensation end cooling process, the volume reduces, and condensation end pressure reduces. In this case, a pressure difference exists between the evaporation end and the condensation end of the pulsating heat pipe, the pressure difference becomes a driving force for the operation of the pulsating heat pipe, the high-temperature medium at the evaporation end is pushed to the condensation end for cooling and condensation, and the low-temperature medium at the condensation end is pushed to the evaporation end for heating and vaporization. In addition, pressure imbalance exists between adjacent pipelines, so that the working medium performs oscillating motion between the evaporation end and the condensation end, and heat transfer is realized. The whole reaction process is faster along with the increase of the heating power. This application has solved the problem that heat transfer area is little, and the radiating efficiency is low of pulsation heat pipe 1 through setting up the great surface area of heat dissipation module. The heat dissipation module is composed of a plurality of heat dissipation fin modules, the number of the heat dissipation fin modules can be selected according to the number of the pulsating heat pipes 1, the heat dissipation fin modules are assembled into a whole, and the heat dissipation fin modules can be flexibly adjusted according to a heat source. The radiating fin module is formed by arranging the short fin group 4 and the long fin group 5 at intervals, so that the radiating efficiency is improved.

The technical scheme can also comprise the following technical details so as to better realize the technical effects: the radiating fin module has a top plate 3, one side of 3 length limits on top plate is provided with first otic placode 6, the opposite side on 3 length limits on top plate is provided with second otic placode 7, first otic placode 6 with second otic placode 7 sets up to: the first lug plate 6 and the second lug plate 7 of two adjacent radiating fin modules are fixed through bolts; the heat dissipation module is provided with a plurality of heat dissipation fans 8. The heat dissipation module is used in combination with the heat dissipation fan 8, and heat is quickly dissipated into the air through convection air of the fan.

The technical scheme can also comprise the following technical details so as to better realize the technical effects: the inner diameter of the pulsating heat pipe 1 is 1-2 mm.

The technical scheme can also comprise the following technical details so as to better realize the technical effects: and a flushing port is arranged on one side of the pulsating heat pipe 1 and is used for filling working medium into the pulsating heat pipe 1.

The technical scheme can also comprise the following technical details so as to better realize the technical effects: the heat radiation fan 8 is fixed on the top plate 3 of the heat radiation fin module through a bracket.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields suitable for the invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and embodiments shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A high-power pulsating heat pipe heat conduction structure is characterized by comprising:

the top surface of the base plate is provided with a plurality of first groove bodies and second groove bodies which are arranged at intervals, and the lower parts of the pulsating heat pipes are embedded in the first groove bodies of the base plate in a one-to-one correspondence manner;

2. The high power pulsating heat pipe heat conducting structure as claimed in claim 1, wherein said heat dissipating fin module has a top plate, a first ear plate is disposed on one side of a length edge of said top plate, a second ear plate is disposed on the other side of said length edge of said top plate, and said first ear plate and said second ear plate are configured as: the first lug plate and the second lug plate of two adjacent radiating fin modules are fixed through bolts; the heat dissipation module is provided with a plurality of heat dissipation fans.

3. The high power pulsating heat pipe heat transfer structure as claimed in claim 1 or 2, wherein the inner diameter of said pulsating heat pipe is 1-2 mm.

4. The heat conduction structure of the high-power pulsating heat pipe as claimed in claim 1, wherein a flushing port is provided at one side of the pulsating heat pipe.

5. The high power pulsating heat pipe heat transfer structure of claim 2, wherein said heat dissipation fan is fixed to a top plate of a heat dissipation fin module by a bracket.