WO2018226059A1

WO2018226059A1 - Energy harvesting apparatus capable of cooling, and integrated heat spreader-type wireless charging receiving module

Info

Publication number: WO2018226059A1
Application number: PCT/KR2018/006507
Authority: WO
Inventors: 이형순; 이상민; 최승태; 공대영; 정상우; 용형석; 김태훈; 김반석
Original assignee: 중앙대학교 산학협력단
Priority date: 2017-06-08
Filing date: 2018-06-08
Publication date: 2018-12-13
Also published as: KR101886968B1

Abstract

The present invention relates to an energy harvesting apparatus capable of cooling. The energy harvesting apparatus, according to the present invention, is for increasing energy use efficiency by cooling heat emitting from an electronic device, and for harvesting lost energy by using an electric field emitting from the electronic device. The energy harvesting apparatus comprises: a heat absorption layer which has formed thereto a flow path enabling a working fluid to flow, and vaporizes the working fluid by means of heat emitting from an electronic device; a heat dissipation layer which is arranged in a position facing the heat absorption layer at an interval, is communicatably connected with the flow path of the heat absorption layer, and enables the gas-state heat of the working fluid to be dissipated so that same may undergo a phase change into a liquid state; an electrode layer which generates an output by receiving, via the working fluid, a signal of an electric field emitting from the electronic device; and a cover layer which closes off the heat absorption layer, the heat dissipation layer and the electrode layer.

Description

Cooling energy harvesting device and integrated heat spreader wireless charging receiver module

The present invention relates to an energy harvesting device capable of cooling, and more particularly, to improve the energy use efficiency by cooling the heat from the electronic device, and to improve the structure so that energy lost in the electric field environment can be harvested. The present invention relates to an energy harvesting device capable of cooled cooling.

The present invention also relates to a wireless charging receiving module, and more particularly, to an integrated heat spreader type wireless charging receiving module installed in an electronic device and receiving power from a wireless charging transmitting module.

Electronic devices, such as smartphones, laptops, cameras, or electronic components such as graphics cards and graphics cards that are commonly used in life, generate heat and electric fields by the use of electrical energy.

Since the heat generated by such electronic devices is the biggest factor in decreasing the energy use efficiency, numerous technologies are continuously developed to cool the heat.

In order to cool the heat, mechanical methods such as chemical method and cooling fin structure change by improving cooling materials are actively developed, but these cooling technologies are required to have a simple configuration with a smaller size.

In addition, the energy loss is generated by the electric field generated in the electronic device, the development of technology that can further improve the energy use efficiency by harvesting the lost energy again.

On the other hand, as the demand for consumer performance increases, heat dissipation problems in electronic devices have become the most important factor in determining the overall performance of the device. As a solution to this problem, cooling using phase change is in the spotlight due to its high heat transfer performance. Recently developed smartphones of Samsung Electronics and LG Electronics have realized high performance by using a heat pipe using liquid cooling.

In addition, recently, due to rapid technology development for wireless charging of electronic devices, applications using actual wireless charging are increasing. In order to increase the efficiency of wireless charging, magnetic shielding of a receiving module is important. In many cases, a magnetic field shielding sheet made of ferrite is used to improve performance. Therefore, it is necessary to develop a wireless charging device having a structure capable of maximizing heat dissipation performance while shielding magnetic fields.

[Related Patent Documents]

Korean Patent Publication No. 10-2017-0018370 (published Feb. 17, 2017)

SUMMARY OF THE INVENTION The present invention has been made in view of the above necessity, and an object of the present invention is to provide a coolable energy harvesting device that enables efficient cooling of an electronic device and harvest of lost energy even with a simple configuration. It is.

In addition, another object of the present invention is to provide a wireless charging receiving module having a structure that can maximize the heat dissipation performance while improving the wireless charging efficiency by shielding the magnetic field in the wireless charging receiving module.

The present invention for achieving the above object is to cool the heat from the electronic device to increase the energy use efficiency and to harvest the lost energy using the electric field from the electronic device, a flow path through which the working fluid flows is formed A heat absorption layer for vaporizing the working fluid by heat from the electronic device; A heat dissipation layer disposed at a position facing the heat absorbing layer at intervals, the heat dissipating layer being communicatively connected to the flow path of the heat absorbing layer, and dissipating heat of the working fluid in a gas state to change into a liquid state; An electrode layer receiving an electric field signal from the electronic device through the working fluid and generating an output; And a cover layer for closing the heat absorbing layer, the heat dissipating layer, and the electrode layer.

The present invention preferably comprises a steam layer which is formed in the space between the heat absorbing layer and the heat dissipating layer, and transfers the gas generated in the heat absorbing layer to the heat dissipating layer.

It is preferable that the heat absorption layer and the heat dissipation layer have a porous structure.

Preferably, the electrode layer is disposed between the cover layer and the heat dissipating layer to surround the heat dissipating layer.

The cover layer may be formed of a non-metallic material to surround the heat absorbing layer, and may be formed of a metallic material to enclose the heat-dissipating layer.

In accordance with another aspect of the present invention, there is provided an integrated heat spreader type wireless charging receiving module, the wireless charging receiving module receiving an induced current from an electromagnetic field generated by a transmitting coil of a wireless charging transmitting module, wherein a gas flows therein. A chamber housing in which a flow space is formed; A receiving coil installed in the chamber housing and receiving an induced current by an electromagnetic field generated by the transmitting coil, one end of which is connected to a battery; And a shielding sheet that shields an electromagnetic field received by the receiving coil and has a porous structure in which a refrigerant flows.

A porous material may be provided inside the plate forming the chamber housing.

The shielding sheet may be made in powder form.

The receiving coil may have a rear end connected to the battery by a receiving coil electrode, and the receiving coil may be made of a porous structure.

An auxiliary coil pad is installed in a portion of the chamber housing opposite to the shielding sheet. The auxiliary coil pad may have a rear end connected to the battery by an auxiliary coil pad electrode, and the auxiliary coil pad may have a porous structure. .

The shielding sheet may be provided to be mounted inside a plate forming the chamber housing.

The shielding sheet is an evaporation unit for the refrigerant evaporates; A condenser for condensing the gas evaporated in the evaporator; And a moving part between the evaporator and the condenser, wherein the evaporator may have a smaller pore than the condenser.

The shielding sheet is an evaporation unit for the refrigerant evaporates; A condenser for condensing the gas evaporated in the evaporator; And a moving part between the evaporation part and the condensation part, wherein the evaporation part and the condensation part may have a smaller pore than the moving part.

Cooling energy harvesting apparatus according to the present invention having the above-described configuration, by forming a heat exchange cycle between the heat absorbing layer and the heat dissipating layer enables cooling of the heat from the electronic device even with a simple configuration. Through the working fluid circulating the heat absorbing layer and the heat dissipating layer, the AC signal from the electronic device can be received and output through the electrode layer, thereby enabling energy harvesting lost in the electric field, and eventually the electronic device. Cooling and re-harvesting of heat from the effluent have the effect of maximizing energy use efficiency.

On the other hand, the integrated heat spreader type wireless charging receiving module according to the present invention, by forming a shielding sheet in a porous structure to shield the magnetic field in the wireless charging receiving module to improve the wireless charging efficiency and at the same time maximize the heat dissipation performance. .

1 is a cross-sectional view of a cooling energy harvesting apparatus according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the cooling energy harvesting apparatus according to another embodiment of the present invention.

Figure 3 is a cross-sectional view of the cooling energy harvesting apparatus according to another embodiment of the present invention.

Figure 4 is a cross-sectional view of the cooling energy harvesting apparatus according to another embodiment of the present invention.

5 is a cross-sectional view of a cooling energy harvesting apparatus according to another embodiment of the present invention.

Figure 6 is a cross-sectional view of a cooling energy harvesting device according to another embodiment of the present invention.

7 is a view schematically showing a wireless charging receiving module and a wireless charging transmitting module according to an embodiment of the present invention.

8 is a view showing the flow of the refrigerant in the wireless charging receiving module.

9 is a view showing that the heat is discharged to the outside of the wireless charging receiving module.

10 is a view schematically showing a wireless charging receiving module and a wireless charging transmitting module according to another embodiment of the present invention.

Hereinafter, a cooling capable energy harvesting apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of an energy harvesting apparatus capable of cooling according to an embodiment of the present invention.

As shown in this figure, a cooling energy harvesting device according to an embodiment of the present invention, by cooling the heat from the electronic device (A) to increase the energy use efficiency and the electric field from the electronic device (A) In order to harvest the energy lost by using, it comprises a heat absorbing layer 12, heat dissipating layer 14, electrode layer 16 and cover layer 18.

Here, the electronic device (A) uses electrical energy, not only the finished products such as smartphones, notebooks, cameras, etc. which are commonly used in life, but also electronic components such as a central processing unit, graphics card, etc. constituting the finished products. Means any device.

The heat absorbing layer 12 and the heat dissipating layer 14 employed in the present embodiment, for example, to cool the object on the principle of evaporation and condensation of the refrigeration cycle, can be implemented in various structures It enables effective evaporation and condensation.

The heat absorption layer 12 has a flow path through which a working fluid flows, and serves to vaporize the working fluid by heat from the electronic device A.

Here, the working fluid is preferably a fluid capable of dielectric polarization so as to serve as a refrigerant that enables cooling of heat and at the same time to facilitate energy harvesting lost in the electric field.

In addition, the flow path of the heat absorption layer 12 is a generic term for a structure through which the working fluid can flow, and is not limited to a specific form. For example, in the embodiment in which the heat absorbing layer 12 is implemented in a porous structure, the flow path may be a pore forming a porous structure.

The heat dissipating layer 14 has a function that is different from that of the heat absorbing layer 12, and is disposed at a position facing the heat absorbing layer 12 at intervals, and has a flow path of the heat absorbing layer 12. It is communicatively connected and serves to phase change into a liquid state by releasing heat from the working fluid in the gas state.

In order to facilitate the phase change of the heat dissipating layer 14, various phase change means may be employed. For example, when the heat absorbing layer 12 and the heat dissipating layer 14 have a porous structure, It is preferred that the heat absorbing layer 12 be implemented to have a larger pore size than the pore size.

According to the present embodiment including the heat absorbing layer 12 and the heat dissipating layer 14, the working fluid of the heat absorbing layer 12 absorbs and evaporates heat emitted from the electronic device A, and the vaporized portion is vaporized. The working fluid is radiated from the heat dissipating layer 14 to be changed into a liquid phase, thereby enabling cooling of the electronic device A. FIG.

In this embodiment, the flow of the working fluid between the heat absorbing layer 12 and the heat dissipating layer 14 depends on the gaseous phase present in the heat absorbing layer 12 without depending on the forced pumping of the fluid or the forced circulation device. By allowing natural circulation through the surface tension between the fluid and the liquid fluid present in the heat dissipating layer 14, the advantage of enabling the formation of a heat exchange cycle by a simple configuration can be expected.

The present embodiment allows the electrode layer 16 to be organically coupled to the composition consisting of the heat absorbing layer 12 and the heat dissipating layer 14 which derive this advantage, thereby allowing harvesting of lost energy in the electric field.

That is, the electrode layer 16 employed in the present embodiment receives the electric field signal from the electronic device A through the working fluid and generates an output, thereby re-harvesting energy lost in the electric field. Let's do it.

Here, the principle of energy harvesting by the electrode layer 16 will be described.

When the electronic device A is operated, a certain level of electric field and electromagnetic waves are generated, and in this process, materials that are not related to the operation of the electronic device A (product case, wire coating, peripheral material, etc.) The materials vulnerable to the external electric field are polarized by the electric field.

The energy loss layer is generated by materials that are easily influenced and polarized by an external electric field. First, when the electronic device A is based on an alternating current output, the sign of the electric field and the electromagnetic wave is continuously changed, and at this time, as the polarization direction inside the polarized material is continuously changed, the dielectric loss is caused by these materials. Energy loss such as heat and vibration are generated.

In order to harvest the energy lost in this way, in this embodiment, the working fluid is composed of ferroelectric material (ex. Water, polar molecules), and the working fluid is located as close as possible to the heat dissipating layer 14 containing liquid phase. By configuring the electrode layer 16, energy generated in the energy loss layer due to polarization of the material is transferred to the electrode layer 16 through the working fluid.

The present embodiment having such a configuration includes a heat dissipation layer 14 containing the working fluid and an electrode layer 16 disposed at a position adjacent to the heat dissipation layer 14, thereby operating with the ferroelectric material. As the direction of the polarity arrangement formed in the fluid is continuously changed from positive (+) to negative (-), and the electrode layer 16 is also configured to generate a corresponding alternating current output, eventually occurring at the electrode layer 16 By harvesting the collected electrical energy, energy harvesting can be realized.

As described above, the cooling energy harvesting device according to the embodiment of the present invention is formed by forming a heat exchange cycle by the heat absorbing layer 12 and the heat dissipating layer 14, so that the electronic device A can be simplified. In addition to enabling cooling of the heat emitted from the heat sink), an AC signal from the electronic device A is received through a working fluid circulating through the heat absorbing layer 12 and the heat dissipating layer 14. By being configured to output through, it is possible to harvest the energy lost in the electric field, which leads to the advantage of maximizing the energy use efficiency through the cooling of the heat from the electronic device (A) and energy re-harvest.

On the other hand, the working fluid may be a polar fluid that is well polarized reverse, such as water can be used, of course, it is preferable that the liquid that vaporization occurs in the operating temperature range of 40 ~ 80 ℃ of the electronic device (A). .

In addition, the present embodiment includes a steam layer 15 formed between the heat absorbing layer 12 and the heat dissipating layer 14, so that the gas generated in the heat absorbing layer 12 is transferred to the heat dissipating layer 14. It has the advantage of being able to deliver smoothly.

In addition, the heat absorbing layer 12 and the heat dissipating layer 14 is preferably made of a porous structure, so as to facilitate the evaporation and condensation function, the voids of the heat absorbing layer 12 than the heat dissipating layer 14 It is desirable to form smaller.

The electrode layer 16 is preferably arranged in such a manner as to surround the heat dissipation layer 14 so that the electrode dissipation layer 14 can be disposed as close as possible to the heat dissipation layer 14, and the cover layer 18 is the heat absorption layer. (12) and the heat dissipation layer 14 and the electrode layer 16 serves to close.

Hereinafter, a cooling capable energy harvesting apparatus according to another embodiment of the present invention will be described in detail with reference to FIG. 2.

2 is a cross-sectional view of an energy harvesting apparatus capable of cooling according to another embodiment of the present invention.

The embodiment shown in this figure has the same configuration as most of the embodiments described above, but there are differences in electrode layers.

That is, the electrode layer 26 employed in the present embodiment includes a first electrode layer 26a disposed between the cover layer and the heat dissipating layer 24, and a first electrode layer 26 disposed between the cover layer and the heat absorption layer 22. It comprises a two-electrode layer 26b, which derives the advantages of enabling energy harvesting through the working fluid flowing through the heat absorbing layer 22 and energy harvesting through the working fluid flowing through the heat dissipating layer 24 at the same time. .

3 is a cross-sectional view of a cooling energy harvesting apparatus according to another embodiment of the present invention.

Unlike the above-described embodiments, the embodiment illustrated in this figure is configured such that the electrode layers 36a and 36b are formed only in a part of the heat absorption layer 32 and a part of the heat dissipation layer 34.

According to the present exemplary embodiment having such a configuration, the first electrode layer 36a is disposed only in a part of the heat absorption layer 32 so that the AC signal transmitted in the electric field of the electronic device is transmitted to the first electrode layer 36a. Blocking can be suppressed as much as possible, so that the second electrode layer 36b is disposed only in a part of the heat dissipating layer 34, so that the heat dissipation efficiency of the second electrode layer 36b is reduced. It is expected to have advantages.

4 is a cross-sectional view of an energy harvesting apparatus capable of cooling according to another embodiment of the present invention.

The electrode layer employed in the present embodiment may include a plurality of first electrode layers 46a and a second electrode layer disposed to cover the entire heat dissipation layer 44 at intervals in a portion of the heat absorption layer 42 ( 46b).

5 is a cross-sectional view of an energy harvesting apparatus capable of cooling according to another embodiment of the present invention.

In the embodiment shown in this figure, unlike the cover layer described above is formed integrally by a single material, the first cover layer 58a and the heat dissipating layer 54 to surround the heat absorbing layer 52, The two cover layers 58b are formed of different materials.

That is, the first cover layer 58a is preferably formed of a nonmetallic material in order to minimize electromagnetic wave blocking, and the second cover layer 58b is made of a metal material having high thermal conductivity (Cu) in order to increase heat dissipation efficiency. , Al, Fe and the like).

6 is a cross-sectional view of an energy harvesting apparatus capable of cooling according to another embodiment of the present invention.

In this embodiment, similar to the embodiment shown in Figure 5, the cover layer 68 is similar in the configuration consisting of the first cover layer 68a made of a non-metal material and the second cover layer 68b made of a metal material However, the second cover layer 68b formed of a metal material is different from the above-described embodiments in that it is configured to replace the electrode layer.

According to this embodiment, as the configuration can be further simplified, the advantage of improving the cost competitiveness of the product is expected.

Although various embodiments of the present invention have been described above, the present embodiment and the accompanying drawings are only clearly showing a part of the technical spirit included in the present invention, and are included in the specification and drawings of the present invention. Modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical idea will be apparent to be included in the scope of the present invention.

Hereinafter, embodiments of the integrated heat spreader wireless charging receiving module according to the present invention will be described with reference to FIGS. 7 to 10.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, an embodiment of the wireless charging receiving module according to the present invention will be described in detail with reference to the accompanying drawings, in the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals and Duplicate explanations will be omitted.

7 is a view schematically showing a wireless charging receiving module and a wireless charging transmitting module according to an embodiment of the present invention, Figure 8 is a view showing the flow of the refrigerant in the wireless charging receiving module, Figure 9 is a wireless charging The figure shows that heat is released to the outside of the receiving module.

As shown in the drawing, the wireless charging receiving module according to the present invention includes a chamber housing 10 in which a flow space 11 through which gas flows is formed; A receiving coil 12 installed in the chamber housing 10 and receiving an induced current by an electromagnetic field generated by the transmitting coil 2, one end of which is connected to the battery 30; And it may include a shielding sheet 20 made of a porous structure to shield the electromagnetic field received by the receiving coil 12, the refrigerant flows.

The wireless charging transmission module includes a power supply unit 1 and a transmission coil 2 receiving electric energy supplied from the power supply unit 1. The power supply unit 1 may generate AC power having a predetermined frequency and supply it to the transmission coil 2.

The induced current generated by the transmitting coil 2 may be transmitted to the receiving coil 12 inductively coupled with the transmitting coil 2. Alternatively, the power delivered to the transmitting coil 2 may be transmitted to the wireless charging receiving module having the same resonance frequency as the wireless charging transmitting module by the frequency resonance method. Power may be transmitted by resonance between two impedance matched LC circuits.

In this embodiment, the wireless charging receiving module is configured to be arranged in the chamber housing 10, the chamber housing 10 serves as a kind of vapor chamber (vapor chamber). The role of the chamber housing 10 as a vapor chamber means that the refrigerant circulates through the evaporation and condensation in the chamber housing 10. This will be described in more detail below.

The chamber housing 10 is made of a metal having a substantially rectangular parallelepiped shape, and as shown in FIG. 1, a battery 30 and a receiving coil 12 are connected to one side thereof. The receiving coil 12 is electrically connected to the battery 30 by the receiving coil electrode 14 at a rear end thereof, and is formed in a shape in which the coil is wound in a substantially circular or rectangular shape in the chamber housing 10. The chamber housing 10 is not limited to the rectangular parallelepiped shape as described above, and may be made in various shapes such as a circle and a polygon according to the position and shape of the heat generating source 40. In addition, the chamber housing 10 may be made to be folded or bent using a polymer material, without being limited to the above-described metal material.

In addition, a predetermined flow space 11 is formed inside the chamber housing 10. The flow space 11 is a space in which the refrigerant contained in the liquid state in the shielding sheet 20 evaporates and flows. As the flow space 11 is formed in this way, the refrigerant gas flows, so that the refrigerant can circulate freely while repeatedly evaporating and condensing.

The shield sheet 20 is installed below the inner wall of the chamber housing 10. The shielding sheet 20 serves to shield electromagnetic waves radiated from the transmitting coil 2 and electromagnetic waves received from the receiving coil 12. Therefore, energy loss between the wireless charging transmission module and the wireless charging receiving module is minimized, and the power transmission and reception efficiency can be increased.

In FIG. 7, the shielding sheet 20 is illustrated as being installed below the inner wall of the chamber housing 10, but is not necessarily limited thereto and may be installed in various parts according to the induction direction of electromagnetic waves. For example, a mobile device, an electronic pad, etc., to which the present wireless charging receiving module is mainly employed, is often overturned, so that the shielding sheet 20 may be installed on the inner wall of the chamber housing 10.

In this embodiment, the shielding sheet 20 may have a porous structure in which a refrigerant flows. Thus, the shielding sheet 20 is configured to allow the shielding sheet 20 to act as a shield for electromagnetic waves and to perform heat dissipation of the wireless charging receiving module.

8 and 9, when the shielding sheet 20 is made of a porous structure, the liquid refrigerant is permeated into the gaps formed therebetween. In this state, when the refrigerant is heated by the heat generating source 40, the refrigerant located in the evaporator 22 on the shielding sheet 20 is evaporated. As the refrigerant evaporates as described above, the heat of the heat generating source 40 is absorbed, and the gas refrigerant moves to the condensation unit 24 having a lower density and pressure, thereby condensing and dissipating heat. At this time, the condensation unit 24 may be formed to be in close contact with the inner wall side of the chamber housing 10 may emit heat in the lateral direction of the chamber housing 10.

Next, when the refrigerant is changed from gas to liquid, the wick sucks the material into the surface tension. Then, the liquid refrigerant flows back through the moving part 26 toward the evaporation part 22 due to the capillary action of the wick. As described above, when the coolant circulates, the heat generated from the heat generating source 40 may be released, thereby improving heat dissipation efficiency. In the present embodiment, since the shielding sheet 20 not only serves to shield the electromagnetic wave but also performs a heat dissipation role as described above, the performance of the product can be improved. If the pore forming the porous structure of the shielding sheet 20 is too small, the heat dissipation performance may be reduced by the flow resistance, and if the pore is formed too large, it may be appropriately formed in an appropriate size because the refrigerant may not be properly supplied.

On the other hand, the shielding sheet 20 may be made of a porous structure of various forms. For example, as the material of the shielding sheet 20, a ferrite sheet, a polymer sheet, an amorphous alloy or a ribbon sheet of nanocrystalline alloy, etc. may be used, and may be made of a porous structure using powders of these materials. In addition, the shielding sheet 20 may have a saturation magnetic flux density of 0.25 Tesla or more in the frequency band of 50kHz ~ 350kHz and 6.765MHz ~ 6.795MHz. Preferably, the saturation flux density may be 0.35 Tesla or more in the frequency band of 50 kHz to 350 kHz and 6.765 MHz to 6.795 MHz. This is because the higher the saturation magnetic flux density of the shielding sheet 20, the later the saturation due to the magnetic field is generated, so that a thinner thickness can be used than the shielding sheet 20 having the low saturation magnetic flux density.

In addition, the shielding sheet 20 may be made of a material having a Tan ㅿ (= μ ″ / μ ′) of 0.05 or less in the frequency bands of 50 kHz to 350 kHz, 6.765 MHz to 6.795 MHz, and 13.56 MHz (μ ′ is the permeability, μ "Is the loss rate of investment).

Here, the ferrite sheet may be a sintered ferrite sheet, and Ni-Zn ferrite or Mn-Zn ferrite may be used. In addition, the amorphous alloy or nanocrystalline alloy may be used Fe-based or Co-based magnetic alloy. For example, the amorphous alloy and the nanocrystalline alloy may include a three-element alloy or a five-element alloy. Here, the three-element alloy may include Fe, Si, and B, and the five-element alloy may include Fe, Si, B, Cu, and Nb. In addition, the polymer sheet may be a Fe-Si-Al-based or Fe-Si-Cr-based polymer sheet.

The shielding sheet 20 described above is provided as an example and is not necessarily limited thereto. Any shielding sheet 20 may be used as long as the material and structure may be made of a porous structure.

For example, the porous structure may be formed in various forms such as sintered particles, inverse opal, mesh form, or the like. The sintered particle structure is a structure in which spherical particles are heated to a high temperature in a stacked state so that the particles adhere to each other, and a space between the particles creates a porous structure. The inverse opal structure has a spherical sacrificial template laminated and then metals are deposited around it to dissolve the internal sacrificial templates, and the part where the sacrificial templates are located becomes porous. Speak structure. In addition, the mesh foam structure refers to a shape structure consisting of a mesh shape of irregular shape. In addition, nanowire structures, pin-fins structures, or the like may be employed as the porous structures.

In the shielding sheet 20, in order to realize high heat dissipation performance due to an increase in surface area, the evaporator 22 may have a smaller pore than the condenser 24. In addition, the evaporator 22 and the condenser 24 may be formed with a relatively small gap than the moving part 26 to which the refrigerant moves.

The heating source 40 may be, for example, various components such as a central processing unit (cpu), a camera module, a graphics card, and the like installed inside an electronic device such as a smartphone. The heat generating source 40 is to be set in advance in the design stage, the shielding sheet 20 may be installed inside the chamber housing 10 so as to cover the entire position of the heat generating source (40).

Referring to FIG. 10, an auxiliary coil pad 50 may be installed at a portion of the chamber housing 10 that faces the shield sheet 20. The auxiliary coil pad 50 has a rear end connected to the battery 30 by the auxiliary coil pad electrode 52 to receive an induced current together with the receiving coil 12. In addition, in the present embodiment, the auxiliary coil pad 50 is formed in a porous structure so that the auxiliary coil pad 50 may perform a heat dissipation function. As described above, when the auxiliary coil pad 50 has a porous structure, the auxiliary coil pad 50 may serve as a kind of vapor chamber as in the chamber housing 10.

On the other hand, the receiving coil 12 also serves to receive the induced current generated in the transmitting coil 2 and at the same time may be made of a porous structure so that the receiving coil 12 itself to radiate heat. As such, when the receiving coil 12 is formed of a porous structure, it may serve as a kind of vapor chamber like the chamber housing 10. As described above, the receiving coil 12 may be formed of a porous structure such as sintered particles, inverse opals, and a mesh form structure. Of course, when the auxiliary coil pad 50 is formed of a porous structure to perform a heat dissipation function as described above, the receiving coil 12 does not necessarily need to be formed of a porous structure.

In addition, a porous structure may be formed by forming a flow space in the plate constituting the chamber housing 10 and having a porous material. In this case, heat transferred from the heat generating source 40 may be released more quickly through the chamber housing 10 having high thermal conductivity.

In addition, although the shielding sheet 20 is described as being disposed inside the chamber housing 10 in the above-described embodiment, the shielding sheet 20 may be provided to be mounted inside the plate forming the chamber housing 10. have.

Although the foregoing has been described with reference to specific embodiments of the present invention, those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be understood that modifications and changes can be made.

Claims

To cool down the heat from the electronic device to improve energy use efficiency and harvest the lost energy using the electric field from the electronic device.

A heat absorption layer having a flow path through which a working fluid flows, and vaporizing the working fluid by heat from the electronic device;

A heat dissipation layer disposed at a position facing the heat absorbing layer at intervals, the heat dissipating layer being communicatively connected to the flow path of the heat absorbing layer, and dissipating heat of the working fluid in a gas state to change into a liquid state;

An electrode layer receiving an electric field signal from the electronic device through the working fluid and generating an output; And

Cooling energy harvesting device comprising a; the cover layer for closing the heat absorption layer, the heat dissipation layer and the electrode layer.
The method of claim 1,

Cooling energy harvesting device comprising a; formed in the space between the heat absorbing layer and the heat dissipating layer, the steam layer for transferring the gas generated in the heat absorbing layer to the heat dissipating layer.
The method of claim 1,

Cooling energy harvesting device, characterized in that the heat absorption layer and the heat dissipation layer is made of a porous structure.
The method of claim 1,

Cooling energy harvesting device, characterized in that the electrode layer is disposed between the cover layer and the heat dissipating layer to surround the heat dissipating layer.
The method of claim 1,

And the electrode layer comprises a first electrode layer disposed between the cover layer and the heat dissipating layer, and a second electrode layer disposed between the cover layer and the heat absorbing layer.
The method of claim 5,

And the second electrode layer is disposed only in a partial region in the region between the cover layer and the heat absorbing layer so as to suppress electric field shielding by the second electrode layer.
The method of claim 1,

The cover layer is a cooling energy harvesting device, characterized in that for forming the portion surrounding the heat absorption layer made of a non-metal material, and the portion surrounding the heat dissipating layer formed of a metal material.
The method of claim 7, wherein

Cooling energy harvesting device, characterized in that to form the metal part and the electrode layer of the cover layer integrally.
In the wireless charging receiving module for receiving an induced current from the electromagnetic field generated by the transmission coil of the wireless charging transmission module,

A chamber housing in which a flow space through which gas flows is formed;

A receiving coil installed in the chamber housing and receiving an induced current by an electromagnetic field generated by the transmitting coil, one end of which is connected to a battery; And

Integrated heat spreader wireless charging receiving module including a shielding sheet made of a porous structure to shield the electromagnetic field received by the receiving coil, the refrigerant flows.
The method of claim 9,

Integrated heat spreader wireless charging receiving module, characterized in that the porous material is provided inside the plate forming the chamber housing.
The method of claim 9,

The shielding sheet is integrated heat spreader type wireless charging receiving module, characterized in that the powder is made.
The method of claim 9,

And the receiving coil has a rear end connected to the battery by a receiving coil electrode, and the receiving coil is made of a porous structure.
The method of claim 9,

An auxiliary coil pad is installed in a portion of the chamber housing opposite to the shielding sheet. The auxiliary coil pad has a rear end connected to the battery by an auxiliary coil pad electrode, and the auxiliary coil pad has a porous structure. Integrated heat spreader wireless charging receiver module.
The method of claim 9,

The shielding sheet is integrated heat spreader type wireless charging receiving module, characterized in that it is provided to be mounted inside the plate forming the chamber housing.
The method of claim 9,

The shielding sheet is an evaporation unit for the refrigerant evaporates; A condenser for condensing the gas evaporated in the evaporator; And a moving part between the evaporation part and the condensation part,

The evaporator is integrated heat spreader type wireless charging receiving module, characterized in that the gap is formed smaller than the condensation unit.
The method of claim 9,

The shielding sheet is an evaporation unit for the refrigerant evaporates; A condenser for condensing the gas evaporated in the evaporator; And a moving part between the evaporation part and the condensation part,

The evaporator and the condensation unit integrated heat spreader type wireless charging receiving module, characterized in that the gap is formed smaller than the moving unit.