CN220750895U - Temperature equalizing plate and electronic device comprising same - Google Patents

Temperature equalizing plate and electronic device comprising same Download PDF

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Publication number
CN220750895U
CN220750895U CN202090001213.5U CN202090001213U CN220750895U CN 220750895 U CN220750895 U CN 220750895U CN 202090001213 U CN202090001213 U CN 202090001213U CN 220750895 U CN220750895 U CN 220750895U
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China
Prior art keywords
core
width
sheet
sheet member
contact
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CN202090001213.5U
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Chinese (zh)
Inventor
内藤朗人
刘垒垒
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Murata Manufacturing Co Ltd
Cooler Master Co Ltd
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Murata Manufacturing Co Ltd
Cooler Master Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
    • F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0029—Heat sinks

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Abstract

The present utility model relates to a temperature equalizing plate and an electronic device including the same, the temperature equalizing plate including: a housing including a first sheet and a second sheet facing each other; a working medium sealed in the inner space of the housing; and a core located in the interior space and having at least three stacked core components. The first core member is in contact with the first sheet member and the second core member is in contact with the second sheet member. In a cross-sectional view in a direction orthogonal to a direction in which the first sheet member and the second sheet member face each other, the number of core members having a width larger than the core member having the smallest width is two or more, and a width of a portion where the core members overlap each other is equal to or larger than 1/4 of a distance between the support members closest to the core and equal to or smaller than 3/4 of a width of the working space.

Description

Temperature equalizing plate and electronic device comprising same
Technical Field
The present utility model relates to a vapor chamber (vapor chamber).
Background
In recent years, the integration level of devices and the performance thereof have been improved, and the heat generated in the devices has been increased. As product sizes continue to decrease, heat generation density continues to increase, which in turn makes heat dissipation measures important. This situation is particularly pronounced in the field of mobile terminals such as smartphones and tablet devices. Graphite sheets and the like are often used as members for countermeasures against heat generation. However, various other types of members for countermeasure against heat generation have been examined for their feasibility due to insufficient heat transfer capability of the graphite sheet. In particular, a temperature equalization plate in the form of a flat heat pipe has been shown to effectively dissipate heat.
The temperature equalizing plate has the following structure: in this configuration, the working medium and the core that carries the working medium by capillary force are sealed in the housing. The temperature equalization plate comprises an evaporation section in which heat from the heating element is absorbed. The working medium absorbs heat from the heating element in the evaporation section, causing the working medium to evaporate in the cold plate, moving the evaporated working medium to the condensation section where it is cooled and reconverted back to the liquid phase. The working medium reconverted back to the liquid phase moves again to the evaporation section on the side of the heat generating element by the capillary force of the wick, and cools the heat generating element. By repeating this process, the temperature equalizing plate operates independently without using an external power source, and can rapidly two-dimensionally dissipate heat by utilizing the latent heat of vaporization and the latent heat of condensation of the working medium.
For example, PTL 1 (international publication No. wo 2019/065728) discloses a temperature equalizing plate including: a housing; a first pillar provided in an inner space of the housing so as to internally support the housing; a working medium sealed in the inner space of the housing; and a core disposed in the inner space of the housing. One main surface of the core has a portion supported by the first stay and separated from the case, and the core has portions of different thicknesses.
Disclosure of Invention
In the temperature equalizing plate described in PTL 1, a space through which the working medium in liquid form moves and a space through which the working medium in gaseous form moves are provided, and in particular, thereby improving the ability to convey the working medium in liquid form and improving the heat transfer ability of the temperature equalizing plate. In particular, in order to improve the capacity to transport the working medium in liquid form, the core is provided over as wide an area as possible, and the thickness of the core is increased.
In the temperature equalizing plate described in the embodiment of PTL 1, a core is formed by stacking two mesh pieces having different sizes so that the core has portions of different thicknesses. In the thicker portions of the webs that overlap each other, the cross-sectional area of the core is larger and thus a larger capillary force is obtained, so that the capacity for transporting the working medium in liquid form is increased.
To further increase the capacity to transport working medium in liquid form, it may be considered to stack a greater number of core components, such as mesh, to form the core. However, when the number of stacked core members is three or more, the positions of the core members may be shifted during the manufacture of the temperature equalizing plate, and this may result in a reduction in the cross-sectional area of the core, and the heat transfer capability of the temperature equalizing plate may be reduced.
The present utility model has been made to solve the above-mentioned problems, and an object thereof is to provide a temperature uniformity plate having a high heat transfer capability. Another object of the present utility model is to provide an electronic device including a temperature equalizing plate.
The temperature equalization plate of the present utility model comprises: a housing including a first sheet member and a second sheet member facing each other, wherein an outer edge portion of the first sheet member and an outer edge portion of the second sheet member are joined together to define an interior space; a working medium located in the interior space of the housing; and a core located in the interior space of the housing and having at least three stacked core components. A first core component of the at least three stacked core components is in contact with the first sheet and a second core component of the core components is in contact with the second sheet. In a cross-sectional view of the temperature-equalizing plate in a direction orthogonal to a direction in which the first sheet member and the second sheet member face each other, the number of core members having a width larger than one of the core members having the smallest width is two or more, and a width of a portion of the temperature-equalizing plate in which the first core member, the second core member, and at least the third core member overlap each other is equal to or larger than 1/4 of a distance between the support members closest to the cores, and is equal to or smaller than 3/4 of a width of a working space of the temperature-equalizing plate.
An electronic device according to an aspect of the present utility model includes the temperature equalizing plate of the present utility model.
According to the present utility model, the heat transfer capability of the temperature equalizing plate can be improved.
Drawings
Fig. 1 is a plan view schematically showing a temperature uniformity plate according to a first embodiment of the present utility model.
Fig. 2 is a cross-sectional view taken along line A-A in the isopipe shown in fig. 1.
Fig. 3A is a cross-sectional view for explaining the following case: in a temperature equalizing plate comprising a core member having a minimum width and at least two core members having a width larger than the core member having the minimum width, one of the core members is displaced.
Fig. 3B is a cross-sectional view for explaining the following case: in a temperature equalizing plate comprising a core member having a minimum width and at least two core members having a width larger than the core member having the minimum width, one of the core members is displaced.
Fig. 4A is a cross-sectional view for explaining the following case: in a temperature equalizing plate in which the number of core members having a width larger than the core member having the smallest width is smaller than two, one of the core members is displaced.
Fig. 4B is a cross-sectional view for explaining the following case: in a temperature equalizing plate in which the number of core members, which is greater in width than the core member having the smallest width, is smaller than two, one of the core members is displaced.
Fig. 5 is a cross-sectional view schematically showing a temperature uniformity plate according to a second embodiment of the present utility model.
Fig. 6 is a cross-sectional view schematically showing a temperature uniformity plate according to a third embodiment of the present utility model.
Fig. 7 is a cross-sectional view schematically showing a temperature uniformity plate according to a fourth embodiment of the present utility model.
Fig. 8 is a cross-sectional view schematically showing a temperature uniformity plate according to a fifth embodiment of the present utility model.
Fig. 9 is a cross-sectional view schematically showing a temperature uniformity plate according to a sixth embodiment of the present utility model.
Fig. 10 is a plan view schematically showing a temperature uniformity plate according to a seventh embodiment of the present utility model.
Fig. 11 is a cross-sectional view taken along line A-A in the temperature equalization plate shown in fig. 10.
Detailed Description
A temperature uniformity plate according to a preferred embodiment of the present utility model will be described herein.
The present utility model is not limited to the structure described below, and may be implemented in various modifications without departing from the scope of the present utility model. The utility model also includes any combination of at least two preferred structures of the utility model described below.
The embodiments described below are examples only, and it is understood that structures in different embodiments may be partially replaced or combined. In the second embodiment and the subsequent embodiments, description of the same features as those of the first embodiment will be omitted, and only differences will be described. In particular, similar operational advantages obtained in similar structures will not be described in all embodiments.
In the following description, the phrase "the temperature uniformity plate of the present utility model" will be used when the embodiments are not clearly distinguished from each other.
Fig. 1 is a plan view schematically showing a temperature uniformity plate according to a first embodiment of the present utility model. Fig. 2 is a cross-sectional view taken along line A-A in the isopipe shown in fig. 1.
The temperature uniformity plate 1a shown in fig. 1 and 2 includes a housing 4, the housing 4 including a first sheet member 2 and a second sheet member 3, the first sheet member 2 and the second sheet member 3 facing each other and respective outer edge portions being joined together. The core 6 is arranged in the inner space 5 of the housing 4. The first sheet member 2 and the second sheet member 3 are brought close to each other toward their outer edge portions, are contacted in the outer edge portions, are joined together, and are thereby sealed. The portion in which the first sheet member 2 and the second sheet member 3 are joined together may also be referred to as a "joined portion" hereinafter. In other words, the first sheet member 2 and the second sheet member 3 are joined together in the joining portion 11 located at the outer edge portion of the sheet material, and thereby sealed. The temperature equalization plate 1a further comprises a working medium (not shown) sealed in the inner space 5 of the housing 4.
The core 6 comprises three stacked core components. The number of stacked core components included in the core 6 may be 4 or more. In order to provide an interior space 5 in the housing 4, a core 6 is provided to internally support the first sheet member 2 and the second sheet member 3. Specifically, one of the outermost core members of the core members included in the core 6 is in contact with the first sheet member 2, and the other outermost core member is in contact with the second sheet member 3.
In the present embodiment, the core 6 includes a first core member 7 in contact with the first sheet member 2, a second core member 8 in contact with the second sheet member 3, and a third core member 9 in contact with the first core member 7 and the second core member 8.
In the portion where all the core members 7, 8 and 9 overlap each other, the cross-sectional area of the core 6 is large. Thus, a larger capillary force is obtained and the capacity to transport the working medium in liquid form is higher. The inner space 5 between the core 6 and the first sheet member 2 or between the core 6 and the second sheet member 3 may serve as a vapor passage through which the working medium in gaseous form moves. The ability to transport the working medium in gaseous form is thereby obtained.
As shown in fig. 2, a first feature of the temperature equalizing plate 1a is that, in a cross-sectional view in a direction orthogonal to a direction in which the first sheet member 2 and the second sheet member 3 face each other, there are at least two core members having a width larger than that of the core member having the smallest width. In this case, it is possible to prevent the change in the cross-sectional area of the core due to the displacement of the core member.
Fig. 3A and 3B are cross-sectional views for explaining the following cases: in a temperature equalizing plate comprising a core member having a minimum width and at least two core members having a width larger than the core member having the minimum width, one of the core members is displaced.
As shown in fig. 3A, in the temperature equalizing plate 1a, the number of core members having the smallest width is one, that is, the first core member 7 has the smallest width, and the number of core members having a width larger than the core member having the smallest width is two, that is, the widths of the second core member 8 and the third core member 9 are each larger than the first core member 7. In this case, even when the first core member 7 is moved in the direction of the arrow shown in fig. 3A and displaced to the position shown in fig. 3B, the cross-sectional area of the portion of the core 6 surrounded by the broken line does not change with respect to the cross-sectional area in fig. 3A. Thus, the ability to transport the working medium in liquid form is not reduced.
Fig. 4A and 4B are cross-sectional views for explaining the following cases: in a temperature equalizing plate in which the number of core members having a width larger than the core member having the smallest width is smaller than two, one of the core members is displaced.
As shown in fig. 4A, in the temperature equalizing plate 1a', two core members, i.e., the first core member 7 and the third core member 9, have a minimum width, and only one core member, i.e., the second core member 8, has a width greater than the minimum width. In this case, when the first core member 7 is moved in the arrow direction shown in fig. 4A and displaced to the position shown in fig. 4B, the cross-sectional area of the portion of the core 6 surrounded by the broken line is smaller than that in fig. 4A. Thus, the ability to transport the working medium in liquid form is reduced.
As shown in fig. 2, the second characteristic of the temperature equalizing plate 1a is that, in a cross-sectional view in a direction orthogonal to the direction in which the first sheet member 2 and the second sheet member 3 face each other, the width of a portion in which all the core members 7, 8, and 9 overlap each other (W in fig. 2 1 Indicated length) is equal to or greater than the distance between the supports closest to the core (represented by W in fig. 2 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 2 3 Indicated length) 3/4. In this case, although a passage is provided for the working medium in the form of gas to thereby improve the ability to transport the working medium in the form of gas, the cross-sectional area of the core may be increased to improve the ability to transport the working medium in the form of liquid. Thus, the capacity to transport the working medium in liquid form and the capacity to transport the working medium in gaseous form can be increased, and thus the total heat transfer capacity of the temperature equalization plate can be increased.
When no support post is provided for supporting the housing, "support closest to the core" refers to the engagement portion of the housing, and when a support post is provided for supporting the housing, "support closest to the core" refers to the support post closest to the core. The "width of the working space" refers to the distance from the first side edge of the joint portion of the housing to the second side edge of the joint portion. Thus, when no stay for supporting the housing is provided, the "distance between the supports closest to the core" coincides with the "width of the working space". In fig. 2, the distance W between the supports closest to the core 2 Width W of working space 3 And (5) overlapping.
As shown in fig. 2, in the present embodiment, in a cross-sectional view in a direction orthogonal to the direction in which the first sheet member 2 and the second sheet member 3 face each other, the width of the third core member 9 is larger than the width of the first core member 7, and the width of the second core member 8 is larger than the width of the third core member 9. Thus, regarding the relationship between the widths of the core members 7, 8 and 9, the width of the first core member 7 < the width of the third core member 9 < the width of the second core member 8 is established.
As shown in fig. 1, in the present embodiment, the core members 7, 8, and 9 have mutually different dimensions in a plan view in a direction in which the first sheet member 2 and the second sheet member 3 face each other. Specifically, the third core element 9 is larger than the first core element 7, and the second core element 8 is larger than the third core element 9. Regarding the relation between the dimensions of the core parts 7, 8 and 9, a dimension of the first core part 7 < a dimension of the third core part 9 < a dimension of the second core part 8 is established.
The temperature equalizing plate 1a has a flat overall shape. Specifically, the housing 4 has a flat overall shape. The term "flat shape" is intended to cover plate-like and sheet-like shapes, and refers to shapes whose width and length are significantly larger than their height (thickness), for example, shapes whose length and width are 10 times or more and preferably 100 times or more larger than the thickness.
The size of the temperature uniformity plate 1a, that is, the size of the housing 4 is not particularly limited. The length (length indicated by L in fig. 1) and width (width indicated by W in fig. 1) of the temperature equalizing plate 1a may be appropriately set according to the intended application thereof, and are, for example, from 5mm to 500mm and including 5mm and 500mm, from 20mm to 300mm and including 20mm and 300mm, or from 50mm to 200mm and including 50mm and 200mm.
The material forming the first sheet member 2 and the second sheet member 3 is not particularly limited as long as the material has characteristics suitable for a temperature equalization plate, such as thermal conductivity, strength, flexibility, and flexibility. The material forming the first sheet member 2 and the second sheet member 3 is preferably a metal such as copper, nickel, aluminum, magnesium, titanium, iron, or an alloy containing any of these materials as a main component and particularly preferably copper. The materials forming the first sheet 2 and the second sheet 3 may be the same or different, but are preferably the same.
The thickness of the first sheet 2 and the second sheet 3 is not particularly limited, and the thickness is preferably from 10 μm to 200 μm and includes 10 μm and 200 μm, more preferably from 30 μm to 100 μm and includes 30 μm and 100 μm, and still more preferably from 40 μm to 60 μm and includes 40 μm and 60 μm. The thickness of the first sheet 2 and the second sheet 3 may be the same or different. The thickness of each of the first sheet member 2 and the second sheet member 3 may be uniform over the entire area, or each sheet member may have a thin portion.
The first sheet member 2 and the second sheet member 3 are joined together at outer edge portions thereof. The bonding method is not particularly limited. For example, laser welding, resistance welding, diffusion bonding, brazing, TIG welding (tungsten inert gas welding), ultrasonic bonding, or resin sealing may be used. Preferably, laser welding, resistance welding or brazing may be used.
The core 6 comprises at least three stacked core components. The number of stacked core members is not particularly limited as long as the number is three or more. The number of stacked core members is, for example, 10 or less.
Preferably, the core components comprised in the core 6, such as core components 7, 8 and 9, are each mesh-like. "mesh" refers to a sheet having a mesh structure. "mesh structure" refers to a structure in which a plurality of points are connected by a plurality of line segments. Examples of mesh structures include fibrous structures. The fiber structure is a structure formed of a plurality of fibers, and examples of the fiber structure include a structure in which fibers are woven and a structure in which fibers are irregularly wound. Preferably, the fibrous structure is a structure in which warp and weft threads are woven. The diameters of the warp and weft are not particularly limited. When three or more meshes are used, the mesh direction of the meshes is not particularly limited. The mesh direction may be the same or different.
The thickness of each core member is not particularly limited. The thickness is, for example, from 5 μm to 200 μm and includes 5 μm and 200 μm, preferably from 10 μm to 80 μm and includes 10 μm and 80 μm, and more preferably from 30 μm to 50 μm and includes 30 μm and 50 μm. The thickness of the core member may be the same or different. The thickness of each core member may be uniform over the entire area, or the core members may have thin portions.
Each core member is not limited to be a mesh member as long as the core member has a structure including portions having different thicknesses and can move the working medium by capillary force. Each of the core components used may be a core having a well-known structure for a conventional temperature equalizing plate. Examples of such cores include cores having fine structures such as pores, grooves, or irregularities of the protrusions. The core components may be of the same type or of different types.
The size and shape of each core member are not particularly limited. For example, it is preferable that the core 6 has a size and an overall shape that allow the core 6 itself to be placed continuously inside the housing 4 from the evaporation section to the condensation section. In particular, it is preferable that one of the outermost core members has the maximum width in a cross-sectional view in a direction orthogonal to the direction in which the first sheet member 2 and the second sheet member 3 face each other.
The thickness of the core 6 is not particularly limited. The thickness is, for example, from 5 μm to 400 μm and includes 5 μm and 400 μm, preferably from 10 μm to 150 μm and includes 10 μm and 150 μm, and more preferably from 30 μm to 100 μm and includes 30 μm and 100 μm.
The working medium is not particularly limited as long as the working medium undergoes gas-liquid phase transformation in the environment in the housing. Examples of working media that may be used include water, alcohols, and alternative freons. For example, the working medium is an aqueous compound and preferably water.
Fig. 5 is a cross-sectional view schematically showing a temperature uniformity plate according to a second embodiment of the present utility model.
In the temperature equalizing plate 1b shown in fig. 5, in a cross-sectional view in a direction orthogonal to the direction in which the first sheet 2 and the second sheet 3 face each other, the width of the first core member 7 is larger than the width of the third core member 9, and the width of the second core member 8 is larger than the width of the first core member 7. Thus, regarding the relationship between the widths of the core members 7, 8, and 9, the width of the third core member 9 < the width of the first core member 7 < the width of the second core member 8 is established.
In the temperature equalizing plate 1b shown in fig. 5, the width of the portion where all the core members 7, 8 and 9 overlap each other (W in fig. 5 1 Length of indication) is equal to orGreater than the distance between the supports closest to the core (represented by W in fig. 5 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 5 3 Indicated length) 3/4. In FIG. 5, the distance W between the supports closest to the core 2 Width W of working space 3 And (5) overlapping.
Fig. 6 is a cross-sectional view schematically showing a temperature uniformity plate according to a third embodiment of the present utility model.
In the temperature equalizing plate 1c shown in fig. 6, the first stay 12 is provided on the inner wall surface of the first sheet member 2. The first leg 12 internally supports the first sheet member 2 and the second sheet member 3 together with the core 6. In fig. 6, the first leg 12 is in contact with the second core member 8, but may also be in contact with the second sheet 3.
In the temperature equalizing plate 1c shown in fig. 6, in a cross-sectional view in a direction orthogonal to the direction in which the first sheet 2 and the second sheet 3 face each other, the width of the third core member 9 is larger than the width of the first core member 7, and the width of the second core member 8 is larger than the width of the third core member 9. Thus, regarding the relationship between the widths of the core members 7, 8 and 9, the width of the first core member 7 < the width of the third core member 9 < the width of the second core member 8 is established.
In the temperature equalizing plate 1c shown in fig. 6, the width of the portion where all the core members 7, 8 and 9 overlap each other (W in fig. 6 1 Indicated length) is equal to or greater than the distance between the supports closest to the core (represented by W in fig. 6 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 6 3 Indicated length) 3/4. In FIG. 6, the distance W between the supports closest to the core 2 Is the distance between the first struts 12.
Fig. 7 is a cross-sectional view schematically showing a temperature uniformity plate according to a fourth embodiment of the present utility model.
In the temperature equalizing plate 1d shown in fig. 7, in a cross-sectional view in a direction orthogonal to the direction in which the first sheet 2 and the second sheet 3 face each other, the width of the first core member 7 is larger than the width of the third core member 9, and the width of the second core member 8 is larger than the width of the first core member 7. Thus, regarding the relationship between the widths of the core members 7, 8, and 9, the width of the third core member 9 < the width of the first core member 7 < the width of the second core member 8 is established.
In the temperature equalizing plate 1d shown in fig. 7, the width of the portion where all the core members 7, 8 and 9 overlap each other (W in fig. 7 1 Indicated length) is equal to or greater than the distance between the supports closest to the core (represented by W in fig. 7 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 7 3 Indicated length) 3/4. In FIG. 7, the distance W between the closest supports 2 Is the distance between the first struts 12.
As described above, the first stay may be provided on the inner wall surface of the first sheet member 2. By providing the first stay in the housing 4, deformation of the housing 4 can be prevented more effectively when the pressure in the housing 4 is reduced or external pressure is applied to the housing 4 from the outside.
A second pillar may be provided on the inner wall surface of the second sheet 3. In this case, since the working medium can be held between the second struts, the amount of the working medium can be easily increased. By increasing the amount of working medium, the heat transfer capacity of the temperature equalization plate is improved. The second pillar is a portion whose height is greater than its periphery, and is intended to include a portion protruding from the inner wall surface such as a columnar portion and a portion having a greater height due to the presence of a concave portion such as a groove formed on the inner wall surface.
The second pillar need not be provided only in the second sheet member 3, and the second pillar may be provided in one or both of the first sheet member 2 and the second sheet member 3.
The height of the first support is greater than the height of the second support. The height of the first struts is preferably from 1.5 to 100 times and including 1.5 to 100 times, more preferably from 2 to 50 times and including 2 to 50 times, still preferably from 3 to 20 times and including 3 to 20 times and particularly preferably from 3 to 10 times and including 3 to 10 times greater than the height of the second struts.
The shape of the first support is not particularly limited as long as the first support can support the first sheet member 2 and the second sheet member 3. The shape of the first struts is preferably a cylindrical shape, such as a cylindrical shape, a prismatic shape, a truncated cone shape or a truncated pyramid shape.
The material forming the first support is not particularly limited, and is, for example, a metal such as copper, nickel, aluminum, magnesium, titanium, iron, or an alloy containing any of these metals as a main component, and particularly preferably copper. Preferably, the material forming the first leg is the same as the material forming one or both of the first sheet 2 and the second sheet 3.
The height of the first support column may be appropriately set according to the thickness of the temperature-uniforming plate, and is preferably from 50 μm to 500 μm and includes 50 μm and 500 μm, more preferably from 100 μm to 400 μm and includes 100 μm and 400 μm, and still more preferably from 100 μm to 200 μm and includes 100 μm and 200 μm. For example, the height of the first pillars is from 125 μm to 150 μm and includes 125 μm and 150 μm. The height of the first support column is the height of the first support column in the thickness direction of the temperature equalization plate.
The first struts in the isopipe may have the same height or different heights. For example, the height of a first pillar in a particular region may be different from the height of a first pillar in another region. The thickness of the isopipe can be varied in part by varying the height of some of the first struts.
The thickness of the first support is not particularly limited as long as the first support can have sufficient strength to prevent deformation of the housing of the temperature uniformity plate. In a cross section perpendicular to the height direction of the first struts, the circular equivalent diameter of each first strut is, for example, from 100 μm to 2000 μm and includes 100 μm to 2000 μm, and preferably from 300 μm to 1000 μm and includes 300 μm and 1000 μm. By increasing the circular equivalent diameter of the first leg, deformation of the housing of the temperature equalizing plate can be prevented more effectively. By reducing the circular equivalent diameter of the first struts, a larger space can be provided for the movement of the vapor of the working medium.
The arrangement of the first struts is not particularly limited. The first struts are preferably arranged uniformly in the prescribed region, and more preferably uniformly in the entire region, for example, on grid points, so that the distances between adjacent first struts are the same. By uniformly arranging the first struts, the strength of the temperature equalizing plate can be uniform over the entire area.
The number and interval of the first struts are not particularly limited. Every 1mm on a main surface of one of the sheets defining the internal space of the temperature equalizing plate 2 The number of first struts on the area of (a) is preferably from 0.125 to 0.5 and includes 0.125 and 0.5, and more preferably from 0.2 to 0.3 and includes 0.2 and 0.3. By increasing the number of first struts, deformation of the temperature equalizing plate or the housing can be more effectively prevented. By reducing the number of first struts, a larger space can be provided for the movement of the vapor of the working medium.
The first stay may be integrally formed with the first sheet member 2 or the second sheet member 3, or may be manufactured separately from the first sheet member 2 or the second sheet member 3 and then fixed to a prescribed position.
The height of the second pillar is not particularly limited, and is preferably from 1 μm to 100 μm and includes 1 μm and 100 μm, more preferably from 5 μm to 50 μm and includes 5 μm and 50 μm, and still more preferably from 15 μm to 30 μm and includes 15 μm and 30 μm. By increasing the height of the second leg, the amount of working medium contained may be increased. By reducing the height of the second leg, a larger space can be provided for the movement of the vapor of the working medium. Thus, by adjusting the height of the second leg, the heat transfer capability of the temperature uniformity plate can be adjusted.
The distance between the adjacent second struts is not particularly limited. The distance is preferably from 1 μm to 500 μm and includes 1 μm and 500 μm, more preferably from 5 μm to 300 μm and includes 5 μm and 300 μm, and still more preferably from 15 μm to 150 μm and includes 15 μm and 150 μm. By reducing the distance between adjacent second struts, the capillary force can be increased. By increasing the distance between adjacent second struts, the permeability may be increased.
The shape of the second pillar is not particularly limited. The shape of the second pillar is, for example, a cylindrical shape, a prismatic shape, a truncated conical shape or a truncated pyramid shape. The second struts may have a wall shape, i.e. may be shaped such that grooves are formed between adjacent second struts.
The second stay may be integrally formed with the first sheet member 2 or the second sheet member 3, or may be manufactured separately from the first sheet member 2 or the second sheet member 3 and then fixed to a prescribed position.
Fig. 8 is a cross-sectional view schematically showing a temperature uniformity plate according to a fifth embodiment of the present utility model.
In the temperature equalizing plate 1e shown in fig. 8, the second core member 8 includes separate members. The first core means 7 may comprise separate parts. The second core part 8 may comprise separate parts and the third core part 9 may comprise separate parts.
In the temperature equalizing plate 1e shown in fig. 8, the width of the portion where all the core members 7, 8 and 9 overlap each other (W in fig. 8 1 The sum of the indicated lengths) is equal to or greater than the distance between the supports closest to the core (represented by W in fig. 8 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 8 3 Indicated length) 3/4. In FIG. 8, the distance W between the supports closest to the core 2 Width W of working space 3 And (5) overlapping.
Fig. 9 is a cross-sectional view schematically showing a temperature uniformity plate according to a sixth embodiment of the present utility model.
In the temperature equalizing plate 1f shown in fig. 9, the core 6 includes four stacked core members. As described above, the core 6 may comprise four core components. The core 6 may comprise five or more core components.
In the present embodiment, the core 6 includes a first core member 7 in contact with the first sheet member 2, a second core member 8 in contact with the second sheet member 3, a third core member 9 disposed between the first core member 7 and the second core member 8 and in contact with the first core member 7, and a fourth core member 10 disposed between the first core member 7 and the second core member 8 and in contact with the second core member 8.
In the temperature equalizing plate 1f shown in fig. 9, in a cross-sectional view in a direction orthogonal to the direction in which the first sheet 2 and the second sheet 3 face each other, the width of the third core member 9 is larger than the width of the fourth core member 10, and the width of the first core member 7 and the width of the second core member 8 are larger than the width of the third core member 9. Thus, regarding the relationship between the widths of the core members 7, 8, 9, and 10, the width of the fourth core member 10 < the width of the third core member 9 < the width of the first core member 7=the width of the second core member 8 is established.
In the temperature equalizing plate 1f shown in fig. 9, the width of the portion where all the core members 7, 8, 9 and 10 overlap each other (W in fig. 9 1 Indicated length) is equal to or greater than the distance between the supports closest to the core (represented by W in fig. 9 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 9 3 Indicated length) 3/4. In FIG. 9, the distance W between the supports closest to the core 2 Width W of working space 3 And (5) overlapping.
Fig. 10 is a plan view schematically showing a temperature uniformity plate according to a seventh embodiment of the present utility model. Fig. 11 is a cross-sectional view taken along line A-A in the temperature equalization plate shown in fig. 10.
As shown in fig. 10, the temperature equalizing plate 1g has an L-shape in a plan view in a direction in which the first sheet member 2 and the second sheet member 3 face each other. Specifically, in a plan view, the inner space of the temperature uniformity plate 1g includes a small section 17 and a large section 18 located at one edge of the small section 17.
As shown in fig. 10 and 11, in the present embodiment, the core 6 in the small section 17 includes a first core member 7 in contact with the first sheet member 2, a second core member 8 in contact with the second sheet member 3, and a third core member 9 in contact with the first core member 7 and the second core member 8.
In the large section 18, only one core part is provided in contact with the second sheet 3, i.e. the other second core part 8. In the large section 18, the first struts 12 are provided on the inner wall surface of the first sheet member 2. The other second core element 8 is supported by the first struts 12. In fig. 11, the first leg 12 is in contact with the further second core element 8, but may also be in contact with the second sheet 3. In the large section 18, it is also possible to provide a further first core part 7 in contact with the first sheet-like element 2, a further second core part 8 in contact with the second sheet-like element 3, and a further third core part 9 in contact with the further first core part 7 and the further second core part 8.
In the temperature equalizing plate 1g shown in fig. 11, the width (W in fig. 11) of the portion where all the core members 7, 8, and 9 overlap each other in the small section 17 1 Indicated length) is equal to or greater than the distance between the supports closest to the core (represented by W in fig. 11 2 Indicated length) and is equal to or less than the width of the workspace (defined by W in fig. 11) 3 Indicated length) 3/4. In FIG. 11, the distance W between the supports closest to the core 2 Is the distance between the engagement portion 11 of one side and one of the first struts 12.
The temperature equalizing plate of the present utility model is characterized in that the core includes three or more stacked core members, one of the outermost core members is in contact with the first sheet member and the other is in contact with the second sheet member, the number of core members larger in width than the core member having the smallest width is two or more in a cross-sectional view in a direction orthogonal to a direction in which the first sheet member 2 and the second sheet member 3 face each other, and the width of a portion in which all the core members overlap each other is equal to or greater than 1/4 of a distance between the support members closest to the core and equal to or greater than 3/4 of a width of the working space. Therefore, the present utility model is not limited to the above-described temperature uniformity plate 1a to temperature uniformity plate 1g, and the design of the present utility model may be changed without departing from the gist of the present utility model.
For example, in the above embodiment, the planar shape of the temperature equalizing plate, that is, the planar shape of the housing 4 is a rectangular shape or an L-shape, but this is not limitative. Examples of the planar shape of the temperature equalizing plate include polygonal shapes such as triangular and rectangular shapes, circular shapes, elliptical shapes, and combinations of these shapes. The temperature equalization plate may have a C-shaped (or square U-shaped) planar shape. The planar shape of the temperature equalization plate may include an inner through hole. The planar shape of the temperature-equalizing plate may be any shape suitable for the intended application, for the portion in which the temperature-equalizing plate is installed, and for other components present in the vicinity of the temperature-equalizing plate.
In the temperature equalizing plate 1a, regarding the relationship between the widths of the core members 7, 8, and 9, the width of the first core member 7 < the width of the third core member 9 < the width of the second core member 8 holds. However, the width of the second core member 8 < the width of the third core member 9 < the width of the first core member 7 may be established. Further, for example, the width of the first core member 7 < the width of the third core member 9=the width of the second core member 8 may be established.
In the temperature equalizing plate 1b, regarding the relationship between the widths of the core members 7, 8, and 9, the width of the third core member 9 < the width of the first core member 7 < the width of the second core member 8 holds. However, the width of the third core member 9 < the width of the second core member 8 < the width of the first core member 7 may be established. Further, for example, the width of the third core member 9 < the width of the first core member 7=the width of the second core member 8 may be established.
In the temperature equalizing plate 1f, regarding the relationship between the widths of the core members 7, 8, 9, and 10, the width of the fourth core member 10 < the width of the third core member 9 < the width of the first core member 7=the width of the second core member 8 holds. However, for example, the width of the fourth core member 10 < the width of the third core member 9 < the width of the first core member 7 < the width of the second core member 8 may be established. The position of the core member having the smallest width is not particularly limited.
The temperature equalizing plate can be installed on an electronic device for heat dissipation. Accordingly, an electronic device provided with the temperature equalizing plate of the present utility model is also included in the present utility model. Examples of the electronic device of the present utility model include a smart phone, a tablet terminal, a notebook personal computer, a game device, and a wearable device. As described above, the temperature equalizing plate of the present utility model operates independently without using an external power source, and can rapidly two-dimensionally dissipate heat by using the vaporization latent heat and the condensation latent heat of the working medium. Therefore, in the electronic device equipped with the temperature equalizing plate of the present utility model, heat dissipation can be effectively achieved in a limited space inside the electronic device.
The temperature equalizing plate of the present utility model can be used for various applications in the fields of portable information terminals and the like. For example, the temperature equalizing plate may be used to reduce the temperature of a heat source such as a CPU to thereby extend the service time of an electronic device, and may be used for a smart phone, a tablet, a notebook personal computer, and the like.
List of reference numerals
1a, 1a', 1b, 1c, 1d, 1e, 1f, 1g temperature equalizing plate
2. First sheet-like member
3. Second sheet-like member
4. Shell body
5. Interior space
6. Core(s)
7. A first core part
8. A second core member
9. Third core part
10. Fourth core part
11. Joint portion
12. First support column
17. Small section
18. Large section
W 1 Width of the portion where all the core members overlap each other
W 2 Distance between supports closest to the core
W 3 Width of the workspace.

Claims (19)

1. A temperature equalization plate, comprising:
a housing comprising a first sheet and a second sheet facing each other, wherein an outer edge portion of the first sheet and an outer edge portion of the second sheet are joined together to define an interior space;
a working medium located in the interior space of the housing; and
a core located in the interior space of the housing and having at least three stacked core components,
characterized in that a first core element of the at least three stacked core elements is in contact with the first sheet element and a second core element of the at least three stacked core elements is in contact with the second sheet element,
wherein, in a cross-sectional view of the temperature equalizing plate in a direction orthogonal to a direction in which the first sheet member and the second sheet member face each other, the number of core members having a width larger than that of the core members having the smallest width is two or more, and
wherein the width of the portion of the temperature equalization plate where the first core member, the second core member, and at least the third core member overlap each other is equal to or greater than 1/4 of the distance between the supports closest to the core, and equal to or less than 3/4 of the width of the working space of the temperature equalization plate.
2. The isopipe of claim 1 wherein the at least three stacked core components each have mutually different dimensions in plan view in the direction in which the first and second sheets face each other.
3. The temperature uniformity plate according to claim 2, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first and second sheets face each other, one of said first and second core members has a maximum width in said at least three stacked core members.
4. The temperature uniformity plate according to claim 1, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first and second sheets face each other, one of said first and second core members has a maximum width in said at least three stacked core members.
5. The isopipe of claim 1 wherein the core comprises only the first core component in contact with the first sheet, the second core component in contact with the second sheet, and the third core component in contact with the first core component and the second core component.
6. The temperature uniformity plate according to claim 5, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first sheet member and said second sheet member face each other: the width of the first core means < the width of the third core means < the width of the second core means.
7. The temperature uniformity plate according to claim 5, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first sheet member and said second sheet member face each other: the width of the second core means < the width of the third core means < the width of the first core means.
8. The temperature uniformity plate according to claim 5, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first sheet member and said second sheet member face each other: the width of the third core means < the width of the first core means < the width of the second core means.
9. The temperature uniformity plate according to claim 5, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first sheet member and said second sheet member face each other: the width of the third core means < the width of the second core means < the width of the first core means.
10. The isopipe of claim 2 wherein the core comprises only the first core component in contact with the first sheet, the second core component in contact with the second sheet, and the third core component in contact with the first core component and the second core component.
11. The isopipe of claim 10 wherein in the plan view: the size of the first core means < the size of the third core means < the size of the second core means.
12. The isopipe of claim 1 wherein the core has a thickness from 5 μιη to 400 μιη and comprises 5 μιη and 400 μιη.
13. The isopipe of claim 1 further comprising a leg in the interior space of the housing and on the inner wall surface of the first sheet member, the leg defining a distance between the support members closest to the core.
14. The isopipe of claim 13 wherein the leg is in contact with the second core member.
15. The isopipe of claim 1 wherein at least one of the at least three stacked core components comprises a separate core component.
16. The isopipe of claim 1 wherein the core comprises only the first core component in contact with the first sheet, the second core component in contact with the second sheet, a third core component positioned between the first core component and the second core component, and a fourth core component positioned between the first core component and the second core component and in contact with the second core component.
17. The temperature uniformity plate according to claim 16, wherein in said cross-sectional view in said direction orthogonal to said direction in which said first sheet member and said second sheet member face each other: the width of the fourth core means < the width of the third core means < the width of the first core means = the width of the second core means.
18. The isopipe of claim 1 wherein each of the at least three stacked core components is a mesh.
19. An electronic device comprising the temperature equalizing plate according to claim 1.
CN202090001213.5U 2020-09-10 2020-09-10 Temperature equalizing plate and electronic device comprising same Active CN220750895U (en)

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CN101309573A (en) * 2007-05-18 2008-11-19 富准精密工业(深圳)有限公司 Even heating board and heat radiating device
CN201733557U (en) * 2010-06-28 2011-02-02 昆山巨仲电子有限公司 Hot plate capillary structure
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US10012446B2 (en) * 2015-09-08 2018-07-03 Acmecools Tech. Ltd. Vapor chamber
CN206923219U (en) * 2017-06-23 2018-01-23 泽鸿(广州)电子科技有限公司 Temperature-uniforming plate
JP2021036175A (en) * 2017-09-29 2021-03-04 株式会社村田製作所 Vapor chamber
JP2021039958A (en) * 2017-10-26 2021-03-11 株式会社村田製作所 Internal constitution of electronic apparatus
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