KR20220062731A - Pulsating heat pipe and electronic device with the same - Google Patents

Abstract

Disclosed is a vibrating-type heat pipe and an electronic device equipped with the same. The vibrating-type heat pipe according to a disclosed one embodiment comprises: a housing part; an evaporation part provided in a predetermined center area of the housing part within the housing part and absorbing a heat generated from a heating element; and a condensation part provided in an outside area of the evaporation part in the housing part and discharging the heat absorbed by the evaporation part to the outside, wherein the evaporation part and the condensation part comprise a channel in which a working fluid passes, and the channel is provided in a radial form based on a center of the housing part. Therefore, the present invention is capable of solving a problem for high heat generation in a hot spot of the evaporation part.

Description

Vibration-type heat pipe and electronic device having the same

Embodiments of the present invention relate to vibrating heat pipes.

Recently, as electronic devices are miniaturized and integrated, the need for a cooling system capable of dissipating heat with high efficiency in a narrow space is increasing. A heat pipe is mainly used as such a heat dissipation device. The heat pipe includes an empty space and a wick structure inside, and as the thickness of the heat pipe decreases due to the wick structure, the space through which the vaporized working fluid moves is narrowed, and thus performance is rapidly reduced.

To overcome this, a pulsating heat pipe was developed. The vibrating heat pipe is composed of a smooth tube bundle without a wick structure, and the liquid slug and bubble plug vibrate inside the tube to transfer heat. However, the conventional vibrating heat pipe has difficulty in solving high heat generation in a local hot spot.

Registered Patent Publication No. 10-1832432 (2018.02.26)

An object of the present invention is to provide a vibrating heat pipe capable of evenly spreading a working fluid, and an electronic device having the same.

An object of the present invention is to provide a vibrating heat pipe capable of increasing the circulation force of a working fluid and an electronic device having the same.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

A vibration type heat pipe according to an embodiment of the present disclosure includes: a housing; an evaporation unit provided in a predetermined central region of the housing unit within the housing unit and absorbing heat generated from the heating element; and a condensing unit provided in an area outside the evaporating unit within the housing and discharging heat absorbed by the evaporating unit to the outside, wherein the evaporating unit and the condensing unit include a channel through which a working fluid passes, The channel is provided in a radial shape with respect to the center of the housing part.

The housing part is provided in a circular shape having a preset first radius, and the evaporator includes a circular region having a second radius smaller than the first radius with respect to the center of the housing part, and the condensing part , it may include a ring-shaped region on the outside of the evaporator.

The second radius may be provided as 1/10 to 1/2 of the first radius.

The channels may be provided at regular intervals in all directions with respect to the center of the housing part, and the area occupied by the channels may be provided to increase in width from the center of the housing part toward the outer peripheral surface of the housing part.

The channel may include: a first channel provided at regular intervals in all directions with respect to the center of the housing unit and provided toward an outer peripheral surface of the housing unit in the central region of the housing unit; a second channel spaced apart from the first channel and provided toward an outer peripheral surface of the housing in a central region of the housing; a first connection unit provided to connect an end of the first channel and an end of the second channel; and a second connector connected to the outside from the second channel and connected to another channel adjacent to the channel.

The first channel and the second channel may be provided so as to increase in width from a central region of the housing part toward an outer peripheral surface of the housing part.

A width of the second channel may be narrower than a width of the first channel.

A distance between the first channel and the second channel may be provided to increase from a central region of the housing part toward an outer peripheral surface of the housing part.

One end of the first channel may be provided to extend in a central direction of the housing unit than one end of the second channel.

The first connection part may be provided to have the widest width in the channel.

The channel may include: a first directional valve configured to allow the working fluid to move from a central region of the housing to an outer circumferential direction in the first channel; and a second directional valve configured to allow the working fluid to move from an outer circumferential surface of the housing portion toward a central region in the second channel.

The first directional valve includes a 1-1 directional valve provided on one side of the first channel and a 1-2 directional valve provided on the other side of the first channel, wherein the second directional valve includes: , a 2-1 directional valve provided on one side of the second channel and a 2-2 th directional valve provided on the other side of the second channel.

According to an embodiment of the present invention, since the channel is provided in a radial form with respect to the center of the housing part, heat can be evenly spread in all directions, thereby solving the problem of high heat in the hot spot of the evaporation part. there will be

In addition, by providing one end of the first channel to extend in the central direction of the evaporator than one end of the second channel, it is possible to increase the fluid pumping effect due to gas expansion in the first channel so that the working fluid is rapidly spread.

In addition, by making the width of the second channel narrower than the width of the first channel (forming the channel asymmetrically), the liquid condensed in the second channel can more easily return to the evaporator, so that the circulating force of the working fluid can be increased

In addition, by adding a directional valve to the first channel and the second channel, it is possible to make the working fluid move in one direction in the channel, thereby further increasing the circulating force of the working fluid.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

1 is a perspective view showing the inside of a vibrating heat pipe according to a first embodiment of the present invention;
2 is a plan perspective view of a vibrating heat pipe according to a first embodiment of the present invention;
3 is a diagram illustrating a channel according to an embodiment of the present invention;
4 is a plan perspective view showing the structure of a vibrating heat pipe according to a second embodiment of the present invention;
5 is a plan perspective view showing the structure of a vibrating heat pipe according to a third embodiment of the present invention;

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings are exaggerated to emphasize a clearer description.

The configuration of the invention for clarifying the solution to the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on a preferred embodiment of the present invention, but the same in assigning reference numbers to the components of the drawings The same reference numbers are assigned to the components even if they are on different drawings, and it is to be noted in advance that components of other drawings can be cited when necessary in the description of the drawings.

Meanwhile, directional terms such as upper side, lower side, one side, the other side, etc. are used in connection with the orientation of the disclosed drawings. Since components of embodiments of the present invention may be positioned in various orientations, the directional terminology is used for purposes of illustration and not limitation.

Also, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The above terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

1 is a perspective view showing the inside of a vibrating heat pipe according to a first embodiment of the present invention, and FIG. 2 is a plan perspective view of the vibrating heat pipe according to the first embodiment of the present invention.

1 and 2 , the vibrating heat pipe 100 may include a housing unit 102 , an evaporation unit 104 , and a condensing unit 106 .

In an exemplary embodiment, the vibrating heat pipe 100 may be applied to various electronic devices that generate heat during operation, such as smart phones, tablet PCs, notebook computers, desktop PCs, display devices, and batteries, to radiate heat to the outside. .

The housing unit 102 may constitute the exterior of the vibrating heat pipe 100 . The housing 102 may serve to protect the internal configuration of the vibrating heat pipe 100 from an external environment. In an exemplary embodiment, the housing unit 102 may be provided in the form of a flat plate. The housing unit 102 may be provided to have a predetermined thickness. In addition, the housing unit 102 may be provided in a circular shape. The housing unit 102 may have a circular shape having a first radius R1. The housing unit 102 may be made of various materials, such as a semiconductor material such as silicon, a polymer material such as plastic, a metal material such as copper, and ceramics.

The evaporation unit 104 may be provided in a central region of the housing unit 102 within the housing unit 102 . The evaporation unit 104 may be provided in a region having a preset second radius R2 based on the center of the housing unit 102 . That is, in the disclosed embodiment, the evaporation unit 104 may be formed of a circular region having a second radius R2.

In an exemplary embodiment, the second radius R2 of the region where the evaporation part 104 is formed may be 1/10 to 1/2 of the first radius R1. The evaporator 104 may absorb heat from a heating element (not shown) (eg, an object that generates heat, such as an electronic device, a battery, or a light).

The condensing unit 106 may be provided in an outer region of the evaporating unit 104 in the housing unit 102 . The condensing unit 106 may serve to discharge the heat absorbed by the evaporator 104 to the outside. The condensing unit 106 is provided in a region (ie, R1 - R2 region) obtained by subtracting the region having the second radius R2 of the evaporator 104 from the region having the first radius R1 of the housing unit 102 . can be That is, the condensing unit 106 may be formed as a ring-shaped region having a width of the first radius R1 - the second radius R2.

Meanwhile, the evaporation unit 104 and the condensing unit 106 may include a channel 108 through which the working fluid passes. When the evaporator 104 absorbs heat from a heating element (not shown), when a specific temperature condition between the channel 108 and the working fluid in the channel 108 of the evaporator 104 is satisfied, nucleation This causes bubbles to form and the bubbles to grow larger and larger. The bubble plug generated in the channel 108 of the evaporator 104 travels to the low pressure condensing section 106 (ie, from the evaporator 104 through the channel 108 due to the pressure difference in the condensing section 106 ). to), and is condensed in the condensing unit 106 with a low temperature to transfer heat to the outside.

In the disclosed embodiment, the housing part 102 is provided in a circular shape, the evaporation part 104 is provided in a circular shape at the center of the housing part 102 , and the condensing part 106 is provided in the housing part 102 . By being provided in a ring shape on the outside of the evaporation unit 104, the channel 108 from the evaporation unit 104 to the condensing unit 106 is formed in a radial shape.

That is, the channel 108 is formed in a radial shape in all directions (360 degree direction) with respect to the center of the housing unit 102 . In an exemplary embodiment, the channels 108 may be provided at regular intervals with respect to the center of the housing unit 102 . In this case, heat may be diffused in all directions through the radiating channel 108 , and heat may be rapidly transferred and transferred from the evaporator 104 to the condensing unit 106 in the local area. Accordingly, it is possible to solve the problem of high heat in the hot spot of the evaporator 104 .

The area occupied by the channel 108 in the housing unit 102 may be provided to increase in area from the center of the housing unit 102 toward the outside of the housing unit 102 .

3 is a diagram illustrating a channel 108 according to an embodiment of the present invention. Here, two channels 108-1 and 108-2 are illustrated for convenience of description. Referring to FIG. 3 , the channel 108 - 1 may include a first channel 108a, a first connector 108b, a second channel 108c, and a second connector 108d.

The first channel 108a may be provided from the central region of the housing unit 102 toward the outer peripheral surface of the housing unit 102 . The first channel 108a may be provided to increase in width from the central region of the housing unit 102 toward the outer peripheral surface of the housing unit 102 .

The first connection part 108b may be provided to connect the first channel 108a and the second channel 108c. The first connecting portion 108b may be provided by connecting the end of the first channel 108a and the end of the second channel 108c. In an exemplary embodiment, the first connection portion 108b may be provided with the widest width in the channel 108 - 1 .

The second channel 108c may be provided from the central region of the housing unit 102 toward the outer peripheral surface of the housing unit 102 . One end of the second channel 108c may be provided to be spaced apart from the center of the housing 102 from one end of the first channel 108a. That is, one end of the first channel 108a may extend closer to the center of the housing 102 than one end of the second channel 108c. In other words, one end of the first channel 108a may be provided to extend in the central direction of the evaporator 104 than one end of the second channel 108c.

On the other hand, when the evaporator 104 absorbs heat from the heating element (not shown), the working fluid undergoes a phase change from liquid to gas, and the gas expands during this process. In the disclosed embodiment, by providing one end of the first channel 108a to extend in the central direction of the evaporator 104 from one end of the second channel 108c, the fluid due to gas expansion in the first channel 108a It is possible to increase the pumping effect.

Thereby, the working fluid flows in the direction of the first channel 108a to the second channel 108c. As such, by setting the direction in which the working fluid flows in the channel 108 to one direction from the first channel 108a to the second channel 108c, the movement form of the working fluid in the vibrating heat pipe 100 is pulsation. Rather, circulation dominates, which reduces flow resistance and allows heat to dissipate more quickly.

The second channel 108c may be provided to increase in width from the central region of the housing 102 toward the outer peripheral surface of the housing 102 . In an exemplary embodiment, the second channel 108c may be provided to have the same width as the first channel 108a, but is not limited thereto. The distance between the first channel 108a and the second channel 108c may increase from the central region of the housing unit 102 toward the outer peripheral surface of the housing unit 102 .

The second connection portion 108d may be provided by connecting the channel 108 - 1 and the channel 108 - 1 to the adjacent channel 108 - 2 . The second connection part 108d may protrude outward from one end of the second channel 108c to be connected to the first channel 108a of the neighboring channel 108-2. As such, in the disclosed embodiment, each channel 108 may be interconnected with neighboring channels 108 .

Here, by making the first channel 108a and the second channel 108c wider from the central region of the housing part 102 toward the outer peripheral surface of the housing part 102 , an additional pressure change is generated in the channel 108 . The capillary force increases in the direction in which the channel 108 is narrowed (ie, the direction toward the center of the housing 102 ), so that the liquid condensed in the condensing unit 106 returns to the evaporation unit 104 more quickly. be able to do

According to the disclosed embodiment, the housing unit 102 is formed in a circular shape, and the channels 108 are formed in a radial form from the evaporation unit 104 to the condensing unit 106, so that the radial channels 108 are formed. Through this, heat can be diffused in all directions, and heat is rapidly diffused from the evaporator 104 to the condensing unit 106 to increase heat transfer efficiency.

In addition, by providing one end of the first channel 108a in the channel 108 to extend in the central direction of the evaporator 104 from one end of the second channel 108c, the gas expansion in the first channel 108a By increasing the fluid pumping effect, the working fluid can flow in one direction from the first channel 108a to the second channel 108c, thereby reducing the flow resistance and allowing the heat to diffuse more quickly.

4 is a plan perspective view showing the structure of a vibrating heat pipe according to a second embodiment of the present invention. Here, a part different from the embodiment shown in FIGS. 1 to 3 will be mainly described.

Referring to FIG. 4 , in the channel 108 , the width of the first channel 108a and the width of the second channel 108c may be different. In an exemplary embodiment, the width of the second channel 108c may be narrower than the width of the first channel 108a.

As described above, by increasing the fluid pumping effect due to gas expansion in the first channel 108a, the working fluid flows in the direction from the first channel 108a to the second channel 108c. At this time, the liquid condensed in the condensing unit 106 in the second channel 108c returns to the evaporator 104 .

Here, by providing the width of the second channel 108c to be narrower than the width of the first channel 108a, the liquid condensed in the second channel 108c returns to the evaporator 104 more easily.

5 is a plan perspective view showing the structure of a vibrating heat pipe according to a third embodiment of the present invention. Here, a part different from the embodiment shown in FIGS. 1 to 3 will be mainly described.

Referring to FIG. 5 , the vibration type heat pipe 100 may further include a directional valve 110 . A directional valve 110 may be formed in the channel 108 . The directional valve 110 may include a first directional valve 110 - 1 formed in the first channel 108a and a second directional valve 110 - 2 formed in the second channel 108c.

In addition, the first directional valve 110-1 includes a 1-1 directional valve 110-1a provided on one side of the first channel 108a and a first directional valve 110-1a provided on the other side of the first channel 108a. A -2 directional valve 110-1b may be included. The second directional valve 110-2 includes a 2-1 directional valve 110-2a provided on one side of the second channel 108c and a 2-2nd directional valve 110-2a provided on the other side of the second channel 108c. It may include a directional valve (110-2b).

Here, the directional valve 110 is provided to allow the working fluid to flow in one direction in the channel 108 . For example, the first directional valve 110 - 1 may be provided to allow the working fluid to flow in the first channel 108 - 1 from the center of the housing 102 to the outer circumferential direction. The second directional valve 110 - 2 may be provided to allow the working fluid to flow from the outer circumferential surface of the housing unit 102 to the center in the second channel 108 - 2 .

In an exemplary embodiment, a Tesla valve may be used as the first directional valve 110 - 1 and the second directional valve 110 - 2 . Since the Tesla valve is a known technology, a detailed description thereof will be omitted. If such a Tesla valve is used, it is possible to increase the circulation force of the working fluid by allowing the working fluid to move in only one direction in the channel 108 .

The above detailed description is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and/or within the scope of skill or knowledge in the art. The written embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in the specific application field and use of the present invention are possible. Therefore, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed as including other embodiments.

100: vibration type heat pipe
102: housing part
104: evaporator
106: condensing unit
108: channel
108a: first channel
108b: first connection part
108c: second channel
108d: second connection part
110: directional valve
110-1: first directional valve
110-1a: 1-1 directional valve
110-1b: 1-2 directional valve
110-2: second directional valve
110-2a: 2-1 directional valve
110-2b: 2-2 directional valve

Claims (13)

A vibrating heat pipe comprising:
housing unit;
an evaporation unit provided in a predetermined central region of the housing unit within the housing unit and absorbing heat generated from the heating element; and
and a condensing unit provided in an outer region of the evaporating unit within the housing unit and discharging heat absorbed by the evaporating unit to the outside;
The evaporator and the condensing unit include a channel through which the working fluid passes,
The channel is provided in a radial form with respect to the center of the housing part, the vibration type heat pipe.
The method according to claim 1,
The housing unit is provided in a circular shape having a preset first radius,
The evaporation unit includes a circular region having a second radius smaller than the first radius with respect to the center of the housing unit,
The condensing unit may include a ring-shaped region outside the evaporating unit.
3. The method according to claim 2,
The second radius is provided as 1/10 to 1/2 of the first radius, the vibration type heat pipe.
The method according to claim 1,
The channels are provided at regular intervals in all directions with respect to the center of the housing part,
The area occupied by the channel is provided to increase in width from the center of the housing part toward the outer peripheral surface of the housing part.
The method according to claim 1,
The channels are provided at regular intervals in all directions with respect to the center of the housing part,
a first channel provided from a central region of the housing unit toward an outer circumferential surface of the housing unit;
a second channel spaced apart from the first channel and provided toward an outer peripheral surface of the housing in a central region of the housing;
a first connection unit provided to connect an end of the first channel and an end of the second channel; and
and a second connection part connected to the outside from the second channel and connected to another channel adjacent to the channel.
6. The method of claim 5,
The first channel and the second channel are
The vibration-type heat pipe is provided such that the width increases from the central region of the housing part toward the outer peripheral surface of the housing part.
7. The method of claim 6,
and a width of the second channel is provided to be narrower than a width of the first channel.
6. The method of claim 5,
The interval between the first channel and the second channel is
The vibration-type heat pipe is provided to become wider from the central region of the housing part toward the outer peripheral surface of the housing part.
6. The method of claim 5,
One end of the first channel,
The vibrating heat pipe is provided to extend in a central direction of the housing unit from one end of the second channel.
6. The method of claim 5,
The first connection part,
A vibrating heat pipe provided with the widest width in the channel.
6. The method of claim 5,
The channel is
a first directional valve configured to allow the working fluid to move from a central region of the housing to an outer peripheral surface in the first channel; and
and a second directional valve configured to allow the working fluid to move from an outer circumferential surface of the housing portion toward a central region in the second channel.
12. The method of claim 11,
The first directional valve includes a 1-1 directional valve provided on one side of the first channel and a 1-2 directional valve provided on the other side of the first channel,
The second directional valve includes a 2-1 directional valve provided on one side of the second channel and a 2-2 directional valve provided on the other side of the second channel.
An electronic device comprising the vibrating heat pipe according to any one of claims 1 to 12.

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