CN220187503U

CN220187503U - Vapor chamber and electronic equipment

Info

Publication number: CN220187503U
Application number: CN202190000558.3U
Authority: CN
Inventors: 若冈拓生
Original assignee: Murata Manufacturing Co Ltd
Current assignee: Murata Manufacturing Co Ltd
Priority date: 2020-06-19
Filing date: 2021-05-12
Publication date: 2023-12-15
Anticipated expiration: 2031-05-12
Also published as: TWI827944B; TW202219450A; JPWO2021256126A1; WO2021256126A1

Abstract

The present utility model relates to a vapor chamber and an electronic device. A vapor chamber (1) is provided with a frame (10), a working medium (20), and a plurality of porous bodies (30) that support a first inner wall surface (11 a) and a second inner wall surface (12 a) of the frame (10) from the inside. The porous body (30) includes a first porous body (31), a second porous body (32), a third porous body (33), and a fourth porous body (34) extending from respective first ends to second ends along a first direction (e.g., a longitudinal direction (Y)) perpendicular to the thickness direction (Z). In a cross section perpendicular to the first direction, when the width of a first flow path (51) formed between a first porous body (31) and a second porous body (32) is a, the width of a second flow path (52) formed between the second porous body (32) and a third porous body (33) is b, and the width of a third flow path (53) formed between the third porous body (33) and a fourth porous body (34) is c, the relationship of a < b and c < b is established.

Description

Vapor chamber and electronic equipment

Technical Field

The present utility model relates to a vapor chamber and an electronic device.

Background

In recent years, the amount of heat generated has increased due to the higher integration and higher performance of the element. In addition, as miniaturization of products progresses, heat generation density increases, and thus a countermeasure against heat dissipation becomes important. This situation is particularly pronounced in the field of mobile terminals such as smartphones and tablet computers. As the heat countermeasure component, graphite sheets or the like are often used, but the heat transport amount thereof is insufficient, and thus various heat countermeasure components have been studied for use. Among them, as a method capable of very effectively diffusing heat, studies on the use of a vapor chamber, which is a planar heat pipe, are underway.

The vapor chamber has a structure in which a working medium and a core for transporting the working medium by capillary force are enclosed in a frame. The working medium absorbs heat from the heating element in the evaporation unit that absorbs heat from the heating element, evaporates in the soaking plate, moves to the condensation unit, and is cooled and returns to the liquid phase. The working medium returned to the liquid phase moves again to the evaporation portion on the heating element side by the capillary force of the core body, and cools the heating element. By repeating this operation, the vapor chamber can be operated independently without external power, and the heat can be dissipated two-dimensionally and at high speed by utilizing the latent heat of evaporation and the latent heat of condensation of the working medium.

In order to cope with the thinning of mobile terminals such as smart phones and tablet computers, thinning of the soaking plates is also required. In such a thin vapor chamber, it is difficult to ensure mechanical strength and heat transfer efficiency.

Accordingly, as described in patent documents 1 to 4, in order to secure mechanical strength of a frame constituting the vapor chamber, it is proposed to use a core disposed inside the frame as a support for maintaining the shape of the frame.

Patent document 1: international publication No. 2017/104819

Patent document 2: japanese patent laid-open publication 2016-156584

Patent document 3: japanese patent laid-open publication No. 2018-185110

Patent document 4: japanese patent No. 6442594

In the vapor chamber described in patent document 1, the plurality of first core portions have straight portions, and the struts are arranged between the straight portions, so that the flow path of the gas-phase working medium extends straight to a low-temperature region distant from the evaporation portion. According to this configuration, the path through which the gas-phase working medium passes from the evaporation unit to the low-temperature region is shortened, and the gas-phase working medium is rapidly moved to the low-temperature region, whereby the heat transfer efficiency can be improved.

In the heat pipe described in patent document 2, a frame is formed of an upper plate and a lower plate that are joined to each other, at least one of the upper plate and the lower plate has a plurality of first grooves and a plurality of second grooves intersecting the first grooves on a surface facing the other plate, and a core is disposed inside at least one of the first grooves and the second grooves. According to this configuration, the flow of the working medium can be smoothly returned without stagnation, and therefore, the heat from the heating element can be efficiently diffused over a wide range.

In the heat pipe described in patent document 3, the first core portion and the second core portion are arranged with an interval in the left-right direction, and the liquid accumulation portion formed between the first core portion and the second core portion is filled with the liquid-phase working medium. According to this configuration, the working medium in the liquid phase can be reliably returned to the evaporation unit through the liquid accumulation unit, so that the stagnation of the flow of the working medium in the liquid phase can be prevented, and the reduction of the heat transfer efficiency can be suppressed.

In the vapor deposition plate described in patent document 4, a liquid accumulation flow path for a condensed working medium is formed in a space surrounded by a pair of opposing inner wall surfaces of a frame, a side surface of a core body that does not contact the pair of inner wall surfaces, and an opposing surface formed with a gap between the side surface of the core body. Patent document 4 describes, as liquid-collecting passages, a first liquid-collecting passage in which the facing surface is formed by a housing, and a second liquid-collecting passage in which the facing surface is formed by a core. By combining the core and the liquid accumulation flow path, the liquid can be always supplied to the core, and therefore, the pressure loss of the liquid in the entire liquid flow path can be reduced, and as a result, the maximum heat transfer amount of the vapor chamber can be increased.

As described in patent documents 3 and 4, by forming the liquid accumulation flow path between the cores or between the cores and the frame, stagnation of the flow of the working medium in the liquid phase can be prevented. However, if the number of liquid accumulation flow paths formed by the cores disposed in the soaking plate is larger than the number of flow paths through which the gas-phase working medium passes, the gas-phase working medium tends to remain in the soaking plate, and as a result, the heat diffusion capability of the soaking plate may be lowered.

Disclosure of Invention

The present utility model has been made to solve the above-described problems, and an object of the present utility model is to provide a soaking plate that ensures mechanical strength of a frame and has high heat transfer efficiency. Another object of the present utility model is to provide an electronic device including the vapor chamber.

A soaking plate of the present utility model comprises: a frame body having a first inner wall surface and a second inner wall surface facing each other in a thickness direction; a working medium enclosed in an inner space of the housing; and a plurality of porous bodies disposed in the inner space of the housing and supporting the first inner wall surface and the second inner wall surface of the housing from the inside. The porous body includes a first porous body, a second porous body, a third porous body, and a fourth porous body extending from respective first end portions to second end portions along a first direction perpendicular to the thickness direction. In a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body are arranged in this order, and when a width of a first flow path formed between the first porous body and the second porous body is a, a width of a second flow path formed between the second porous body and the third porous body is b, and a width of a third flow path formed between the third porous body and the fourth porous body is c, a < b and c < b are established.

The electronic device of the present utility model is provided with the vapor chamber of the present utility model.

According to the present utility model, a soaking plate that ensures mechanical strength of a frame and has high heat transfer efficiency can be provided.

Drawings

Fig. 1 is a perspective view schematically showing an example of a soaking plate according to a first embodiment of the present utility model.

Fig. 2 is a cross-sectional view taken along line II-II of the vapor chamber shown in fig. 1.

Fig. 3 is a cross-sectional view taken along line III-III of the soaking plate shown in fig. 1.

Fig. 4 is a cross-sectional view schematically showing an example of a soaking plate according to a second embodiment of the present utility model.

Fig. 5 is a cross-sectional view schematically showing an example of a soaking plate according to a third embodiment of the present utility model.

Fig. 6 is a cross-sectional view schematically showing an example of a soaking plate according to a fourth embodiment of the present utility model.

Fig. 7 is a cross-sectional view schematically showing an example of a soaking plate according to a fifth embodiment of the present utility model.

Fig. 8 is a cross-sectional view schematically showing an example of a soaking plate according to a sixth embodiment of the present utility model.

Fig. 9 is a plan view schematically showing an example of a soaking plate according to a seventh embodiment of the present utility model.

Fig. 10 is a plan view schematically showing an example of a soaking plate according to an eighth embodiment of the present utility model.

Fig. 11 is a plan view schematically showing an example of a vapor chamber according to a ninth embodiment of the present utility model.

Fig. 12 is a plan view schematically showing an example of a vapor chamber according to a tenth embodiment of the present utility model.

Fig. 13 is a plan view schematically showing an example of a soaking plate according to an eleventh embodiment of the present utility model.

Fig. 14 is a cross-sectional view schematically showing an example of a soaking plate according to an eleventh embodiment of the present utility model.

Fig. 15 is a cross-sectional view schematically showing an example of a vapor chamber according to a twelfth embodiment of the present utility model.

Fig. 16 is a cross-sectional view schematically showing an example of a soaking plate according to a thirteenth embodiment of the present utility model.

Fig. 17 is a cross-sectional view schematically showing an example of a soaking plate according to a fourteenth embodiment of the present utility model.

Fig. 18 is a cross-sectional view schematically showing an example of a soaking plate according to a fifteenth embodiment of the present utility model.

Fig. 19 is a cross-sectional view schematically showing another example of the vapor chamber according to the fifteenth embodiment of the present utility model.

Detailed Description

The vapor chamber of the present utility model will be described below.

However, the present utility model is not limited to the following configuration, and can be applied with appropriate modifications within the scope of not changing the gist of the present utility model. The present utility model also includes a combination of two or more of the preferred configurations of the present utility model described below.

The embodiments described below are merely examples, and it is needless to say that partial substitutions and combinations of the structures described in the different embodiments may be made. The second embodiment and the subsequent embodiments will not be described in detail with respect to matters common to the first embodiment, and only the differences will be described. In particular, the same operational effects exerted by the same structure are not mentioned sequentially in each embodiment.

In the following description, the embodiments are not particularly limited, and will be simply referred to as "soaking plate of the present utility model".

The drawings shown below are schematic, and the dimensions, scale of aspect ratio, etc. may be different from the actual products.

First embodiment

Fig. 1 is a perspective view schematically showing an example of a soaking plate according to a first embodiment of the present utility model. Fig. 2 is a cross-sectional view taken along line II-II of the vapor chamber shown in fig. 1. Fig. 3 is a cross-sectional view taken along line III-III of the soaking plate shown in fig. 1.

The soaking plate 1 shown in fig. 1 includes a hollow frame 10 sealed in an airtight state. As shown in fig. 3, the housing 10 has a first inner wall surface 11a and a second inner wall surface 12a facing each other in the thickness direction Z. As shown in fig. 2 and 3, the vapor chamber 1 further includes: a working medium 20 enclosed in the internal space of the housing 10; and a plurality of porous bodies 30 disposed in the inner space of the housing 10.

As shown in fig. 2, the housing 10 is provided with an evaporation unit (evaporation portion) EP for evaporating the sealed working medium 20 and a condensation unit (condensation portion) CP for condensing the evaporated working medium 20. As shown in fig. 1, a heat source HS as a heating element is disposed on the outer wall surface of the housing 10. As the heat source HS, electronic components of an electronic apparatus, for example, a Central Processing Unit (CPU), and the like are exemplified. The portion of the internal space of the housing 10 that is in the vicinity of the heat source HS and is heated by the heat source HS corresponds to the evaporation unit EP. On the other hand, a portion distant from the evaporation portion EP corresponds to the condensation portion CP.

The entire vapor chamber 1 is planar. That is, the entire frame 10 is planar. Here, "planar" includes a plate shape and a sheet shape, and refers to a shape in which the dimension in the width direction X (hereinafter referred to as the width) and the dimension in the length direction Y (hereinafter referred to as the length) are relatively large with respect to the dimension in the thickness direction Z (hereinafter referred to as the thickness or the height), and for example, the width and the length are 10 times or more, preferably 100 times or more, the thickness.

The size of the vapor chamber 1, that is, the size of the frame 10 is not particularly limited. The width and length of the vapor chamber 1 can be appropriately set according to the application. The width and length of the vapor chamber 1 are, for example, 5mm to 500mm, 20mm to 300mm, or 50mm to 200mm, respectively. The width and length of the vapor chamber 1 may be the same or different.

The frame 10 is preferably composed of a first sheet 11 and a second sheet 12 which are opposed to each other and joined at their outer edge portions. The material constituting the first sheet 11 and the second sheet 12 is not particularly limited as long as it has characteristics suitable for use as a vapor chamber, for example, thermal conductivity, strength, flexibility, and the like. The material constituting the first sheet 11 and the second sheet 12 is preferably a metal, for example, copper, nickel, aluminum, magnesium, titanium, iron, an alloy containing these as a main component, or the like, and particularly preferably copper. The materials constituting the first sheet 11 and the second sheet 12 may be the same or different, but are preferably the same.

The first sheet 11 and the second sheet 12 are joined to each other at their outer edge portions. The bonding method is not particularly limited, and for example, laser welding, resistance welding, diffusion bonding, brazing, TIG welding (tungsten-inert gas welding), ultrasonic bonding, or resin sealing can be used, and laser welding, resistance welding, or brazing is preferably used.

The thickness of the first sheet 11 and the second sheet 12 is not particularly limited, but is preferably 10 μm to 200 μm, more preferably 30 μm to 100 μm, and still more preferably 40 μm to 60 μm, respectively. The thicknesses of the first sheet 11 and the second sheet 12 may be the same or different. The thickness of each of the first sheet 11 and the second sheet 12 may be the same as a whole or may be partially thin.

The shape of the first sheet 11 and the second sheet 12 is not particularly limited. For example, in the example shown in fig. 3, the first sheet 11 has a flat plate shape with a constant thickness, and the second sheet 12 has a shape with an outer edge thicker than a portion other than the outer edge.

The thickness of the entire vapor deposition plate 1 is not particularly limited, but is preferably 50 μm to 500 μm.

The working medium 20 is not particularly limited as long as it can undergo a gas-liquid phase change in the environment within the housing 10, and for example, water, alcohols, freon substitutes, and the like can be used. For example, the working medium is an aqueous compound, preferably water.

The porous body 30 supports the first inner wall surface 11a and the second inner wall surface 12a of the frame body 10 from the inside. By disposing the porous body 30 in the internal space of the housing 10, the mechanical strength of the housing 10 can be ensured, and the impact from the outside of the housing 10 can be absorbed. Further, by using the porous body 30 as a support for the housing 10, the vapor chamber 1 can be made lighter.

In the example shown in fig. 3, the porous body 30 is in contact with the first inner wall surface 11a and the second inner wall surface 12a. The porous body 30 may be in contact with either one of the first inner wall surface 11a and the second inner wall surface 12a, or may not be in contact with the first inner wall surface 11a and the second inner wall surface 12a.

The porous body 30 functions as a core for transporting the working medium 20 by capillary force. The porous body 30 is constituted by, for example, a metal porous body, a ceramic porous body, or a resin porous body. The porous body 30 may be made of a sintered body such as a metal porous sintered body or a ceramic porous sintered body. The porous body 30 is preferably made of a porous sintered body of copper or nickel.

The porous body 30 includes a first porous body 31, a second porous body 32, a third porous body 33, and a fourth porous body 34 extending from respective first ends to second ends along a first direction perpendicular to the thickness direction Z. In the example shown in fig. 2 and 3, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 are arranged to extend along the longitudinal direction Y, which is an example of the first direction. The end on the evaporation portion EP side of the end of each of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 is a first end, and the end on the condensation portion CP side is a second end.

In the cross section shown in fig. 3, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 are arranged in this order. When the width of the first flow channel 51 formed between the first porous body 31 and the second porous body 32 is a, the width of the second flow channel 52 formed between the second porous body 32 and the third porous body 33 is b, and the width of the third flow channel 53 formed between the third porous body 33 and the fourth porous body 34 is c, the relationship of a < b and c < b is established.

By making a < b and c < b, the first flow path 51 and the third flow path 53 can be used as liquid flow paths through which the working medium 20 in the liquid phase flows, and the second flow path 52 can be used as vapor flow paths through which the working medium 20 in the gas phase flows. Thus, by making a < b and c < b, a liquid flow path and a vapor flow path are formed between the porous bodies 30. Further, by alternately disposing the liquid flow path and the vapor flow path through the porous body 30, evaporation of the gas-phase working medium 20 is promoted, and therefore, the heat transport efficiency can be improved.

In the evaporation unit EP, the liquid-phase working medium 20 located on the surfaces of the second porous body 32 and the third porous body 33 is heated and evaporated via the inner wall surface of the housing 10. The working medium 20 evaporates, and thereby the pressure of the gas in the second flow path 52 in the vicinity of the evaporation portion EP increases. Thereby, the gas-phase working medium 20 moves in the longitudinal direction Y toward the condensation portion CP side in the second flow path 52.

The gas-phase working medium 20 reaching the condensation portion CP is condensed by taking heat away through the inner wall surface of the casing 10, and becomes droplets. The droplets of the working medium 20 are immersed in the pores of the second porous body 32 and the pores of the third porous body 33 by capillary force. In addition, a part of the liquid-phase working medium 20 that has entered the pores of the second porous body 32 and the pores of the third porous body 33 flows into the first flow channel 51 and the third flow channel 53.

The liquid-phase working medium 20 in the pores of the second porous body 32, the pores of the third porous body 33, the first flow path 51, and the third flow path 53 moves toward the evaporation portion EP in the longitudinal direction Y by capillary force. The liquid-phase working medium 20 is supplied from the pores of the second porous body 32, the pores of the third porous body 33, the first flow path 51, and the third flow path 53 to the evaporation unit EP. The liquid-phase working medium 20 reaching the evaporation unit EP evaporates again from the surfaces of the second porous body 32 and the third porous body 33 at the evaporation unit EP. As shown in fig. 2, it is preferable that the liquid flow path reaches the evaporation unit EP. The evaporation unit EP may include a liquid flow path and a porous body, may include only a porous body without including a liquid flow path, and may include no liquid flow path and a porous body.

The evaporated gas-phase working medium 20 moves toward the condensation portion CP again through the second flow path 52. In this way, the soaking plate 1 can repeatedly use the gas-liquid phase transition of the working medium 20 to repeatedly transfer the heat recovered at the evaporation portion EP side to the condensation portion CP side.

As shown in fig. 2 and 3, a flow path that can be used as a steam flow path is preferably formed between the first porous body 31 and the other porous body on the opposite side of the first flow path 51. Similarly, a flow path that can be used as a steam flow path is preferably formed between the fourth porous body 34 and the other porous body on the opposite side of the third flow path 53.

In the cross section shown in fig. 3, the width a of the first flow channel 51 is preferably 50 μm or more and 500 μm or less, the width b of the second flow channel 52 is preferably 1000 μm or more and 3000 μm or less, and the width c of the third flow channel 53 is preferably 50 μm or more and 500 μm or less. The width a of the first channel 51 may be the same as or different from the width c of the third channel 53. In the cross section described above, when the widths of the flow paths are different in the thickness direction Z, the width of the widest portion is defined as the width of the flow path. In addition, when there are a plurality of second flow paths 52, the widths b may be different from each other. For example, the width b of the second flow path 52 near the center of the soaking plate 1 in the width direction X is wider than the width b of the second flow path 52 near the end of the soaking plate 1 in the width direction X. In this case, the soaking property of the second flow path 52 near the center is improved.

The pore diameters of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 are each preferably 50 μm or less. By reducing the pore size, a high capillary force can be obtained. The pore diameters of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be the same as or different from each other. The shape of the hole is not particularly limited.

In the cross section shown in fig. 3, the widths of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 are preferably 5 μm to 500 μm, respectively. Thus, a high capillary force can be obtained. The widths of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be the same or different from each other. As will be described later in the second embodiment, the widths of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may not be constant in the thickness direction Z. In addition, a porous body having a constant width in the thickness direction Z and a porous body having a non-constant width in the thickness direction Z may be mixed. In the cross section described above, when the widths of the porous bodies are different in the thickness direction Z, the width of the widest portion is defined as the width of the porous body.

In the cross section shown in fig. 3, the heights of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 are preferably 20 μm to 300 μm, more preferably 50 μm to 300 μm, respectively. Even when the heights of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 are set to the above-described ranges, and the entire vapor chamber 1 is thinned, the mechanical strength and the maximum heat transfer amount can be ensured by disposing the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 in the frame 10 as described above. The heights of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be the same or different from each other.

As shown in fig. 2 and 3, the porous body 30 may include porous bodies other than the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34. The porous bodies other than the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be porous bodies extending in a first direction (for example, the longitudinal direction Y) perpendicular to the thickness direction Z, or may be porous bodies extending in a second direction (for example, the width direction X or the like) perpendicular to the thickness direction Z and intersecting the first direction. The porous body may further include a porous body extending in a direction other than the first direction and the second direction. The number, shape, etc. of the porous bodies 30 are not particularly limited.

In the example shown in fig. 2, the porous body 30 further includes a fifth porous body 35 connected to the first end of the second porous body 32 and the first end of the third porous body 33, and a sixth porous body 36 arranged at a distance along the fifth porous body 35, and a fourth flow path 54 formed between the fifth porous body 35 and the sixth porous body 36 is connected to the first flow path 51 and the third flow path 53. The fifth porous body 35 and the sixth porous body 36 extend in the width direction X.

The porous body 30 further includes a seventh porous body 37 connected to the second end of the second porous body 32 and the second end of the third porous body 33, and an eighth porous body 38 arranged at intervals along the seventh porous body 37, and a fifth flow path 55 formed between the seventh porous body 37 and the eighth porous body 38 is connected to the first flow path 51 and the third flow path 53. The seventh porous body 37 and the eighth porous body 38 extend in the width direction X.

As described above, in the soaking plate 1, the liquid flow path and the vapor flow path are formed between the porous bodies 30. As shown in fig. 2, the flow path at the evaporation unit EP preferably has a higher density than the flow path at the condensation unit CP. This can improve the maximum heat transfer amount.

In the soaking plate of the present utility model, the first porous body, the second porous body, the third porous body, and the fourth porous body may have a constant width in the thickness direction or a non-constant width in the thickness direction in a cross section perpendicular to the first direction. For example, in a cross section perpendicular to the first direction, the width of the end portion on the second inner wall surface side of each of the first porous body, the second porous body, the third porous body, and the fourth porous body may be smaller than the width of the end portion on the first inner wall surface side. In this case, a portion having a constant width may be included.

Second embodiment

In the second embodiment of the present utility model, the widths of the first porous body, the second porous body, the third porous body, and the fourth porous body in the cross section perpendicular to the first direction are continuously narrowed from the end on the first inner wall surface side toward the end on the second inner wall surface side.

In the soaking plate 1A shown in fig. 4, the porous body 30 includes a first porous body 31A, a second porous body 32A, a third porous body 33A, and a fourth porous body 34A. The width of the end portion on the second inner wall surface 12A side of each of the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A is narrower than the width of the end portion on the first inner wall surface 11A side. The widths of the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A continuously narrow from the end on the first inner wall surface 11A side toward the end on the second inner wall surface 12A side. In the example shown in fig. 4, the cross-sectional shapes of the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A are each trapezoidal. The cross-sectional shapes of the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A are not particularly limited, and may be other shapes.

In the soaking plate 1A shown in fig. 4, the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A have the above-described cross-sectional shapes, whereby the pressure from the outside of the frame 10 can be dispersed. Further, the internal space of the housing 10 is easily held in a minimum area, and the sectional areas of the vapor flow path and the liquid flow path can be ensured to the maximum, so that the maximum heat transfer amount and the heat diffusion capability can be improved. Further, since the liquid is formed in the acute angle between the end of the second inner wall surface 12a having a small area and the housing 10, the liquid-phase working medium 20 is easily introduced into the liquid flow path between the porous bodies 30, and the maximum heat transport capacity is improved. Alternatively, the exudation of the liquid-phase working medium 20 to the vapor flow path is improved, and the heat diffusion capability is improved.

Third embodiment

In the third embodiment of the present utility model, in a cross section perpendicular to the first direction, the widths of the first porous body, the second porous body, the third porous body, and the fourth porous body are gradually narrowed from the end on the first inner wall surface side toward the end on the second inner wall surface side.

In the soaking plate 1B shown in fig. 5, the porous body 30 includes a first porous body 31B, a second porous body 32B, a third porous body 33B, and a fourth porous body 34B. The width of the end portion on the second inner wall surface 12a side of each of the first porous body 31B, the second porous body 32B, the third porous body 33B, and the fourth porous body 34B is narrower than the width of the end portion on the first inner wall surface 11a side. The widths of the first porous body 31B, the second porous body 32B, the third porous body 33B, and the fourth porous body 34B are gradually narrowed from the end on the first inner wall surface 11a side toward the end on the second inner wall surface 12a side. In the example shown in fig. 5, the cross-sectional shapes of the first porous body 31B, the second porous body 32B, the third porous body 33B, and the fourth porous body 34B are each a combination of a first rectangle disposed on the first inner wall surface 11a side and a second rectangle disposed on the second inner wall surface 12a side and having a narrower width than the first rectangle. The cross-sectional shapes of the first porous body 31B, the second porous body 32B, the third porous body 33B, and the fourth porous body 34B are not particularly limited, and may be other shapes.

In the vapor chamber 1B shown in fig. 5, the first porous body 31B, the second porous body 32B, the third porous body 33B, and the fourth porous body 34B have the above-described cross-sectional shapes, thereby obtaining the same effects as those of the vapor chamber 1A shown in fig. 4.

Fourth embodiment

A fourth embodiment of the present utility model is a modification of the second and third embodiments. In the fourth embodiment of the present utility model, the first inner wall surface side end portions of the first porous body and the second porous body are connected to each other. Similarly, the first inner wall surface side end portions of the third porous body and the fourth porous body are connected to each other. If the ends of the porous body are connected to each other, the contact area between the porous body and the first inner wall surface increases, and the adhesive strength increases, so that the resistance to mechanical stress such as bending and vibration can be improved.

In the soaking plate 1C shown in fig. 6, the porous body 30 includes a first porous body 31C, a second porous body 32C, a third porous body 33C, and a fourth porous body 34C. The width of the end portion on the second inner wall surface 12a side of each of the first porous body 31C, the second porous body 32C, the third porous body 33C, and the fourth porous body 34C is narrower than the width of the end portion on the first inner wall surface 11a side. The cross-sectional shapes of the first porous body 31C, the second porous body 32C, the third porous body 33C, and the fourth porous body 34C are not particularly limited.

The first porous body 31C and the second porous body 32C are connected to each other at the first inner wall surface 11a side end portions, and the third porous body 33C and the fourth porous body 34C are connected to each other at the first inner wall surface 11a side end portions.

The first porous body 31C and the second porous body 32C may have end portions on the first inner wall surface 11a side connected to each other, and the third porous body 33C and the fourth porous body 34C may have end portions on the first inner wall surface 11a side not connected to each other. The first porous body 31C and the second porous body 32C may not be connected to each other at the first inner wall surface 11a side end portions, and the third porous body 33C and the fourth porous body 34C may be connected to each other at the first inner wall surface 11a side end portions.

Fifth embodiment

In the fifth embodiment of the present utility model, in a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body have a portion having a width wider than the first inner wall surface side end and the second inner wall surface side end between the first inner wall surface side end and the second inner wall surface side end, respectively.

In the soaking plate 1D shown in fig. 7, the porous body 30 includes a first porous body 31D, a second porous body 32D, a third porous body 33D, and a fourth porous body 34D. The width of the end portion on the second inner wall surface 12a side of each of the first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D is narrower than the width of the end portion on the first inner wall surface 11a side. The first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D have a portion having a width wider than the first inner wall surface 11a side end and the second inner wall surface 12a side end between the first inner wall surface 11a side end and the second inner wall surface 12a side end, respectively.

In the soaking plate 1D shown in fig. 7, the first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D have the above-described cross-sectional shapes, thereby obtaining the same effects as in the soaking plate 1A shown in fig. 4.

In the first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D, the width of the end portion on the first inner wall surface 11a side may be the same as or different from the width of the end portion on the second inner wall surface 12a side.

In the first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D, positions where the portions wider than the end portions on the first inner wall surface 11a side and the end portions on the second inner wall surface 12a side exist are not particularly limited. In addition, two or more portions may be present at a wider width than the end portion on the first inner wall surface 11a side and the end portion on the second inner wall surface 12a side. In this case, the widths of the portions wider than the end portion on the first inner wall surface 11a side and the end portion on the second inner wall surface 12a side may be the same or different from each other.

The cross-sectional shapes of the first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D are not particularly limited. The widths of the first porous body 31D, the second porous body 32D, the third porous body 33D, and the fourth porous body 34D may be continuously or stepwise changed.

Sixth embodiment

In the sixth embodiment of the present utility model, in a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body have portions having widths narrower than the first inner wall surface side end and the second inner wall surface side end between the first inner wall surface side end and the second inner wall surface side end, respectively.

In the soaking plate 1E shown in fig. 8, the porous body 30 includes a first porous body 31E, a second porous body 32E, a third porous body 33E, and a fourth porous body 34E. The width of the end portion on the second inner wall surface 12a side of each of the first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E is narrower than the width of the end portion on the first inner wall surface 11a side. The first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E have portions having a narrower width than the first inner wall surface 11a side end and the second inner wall surface 12a side end between the first inner wall surface 11a side end and the second inner wall surface 12a side end, respectively.

In the soaking plate 1E shown in fig. 8, the first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E have the above-described cross-sectional shapes, whereby the pressure from the outside of the frame 10 can be dispersed. In addition, the working medium 20 of the liquid phase is easily absorbed in the wide portion, and evaporation of the working medium 20 is easily promoted in the narrow portion. As a result, the maximum heat transport capacity is improved.

In the first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E, the width of the end portion on the first inner wall surface 11a side may be the same as or different from the width of the end portion on the second inner wall surface 12a side.

In the first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E, positions where portions having widths narrower than the end portions on the first inner wall surface 11a side and the end portions on the second inner wall surface 12a side exist are not particularly limited. In addition, two or more portions may be present at which the width is narrower than the end portion on the first inner wall surface 11a side and the end portion on the second inner wall surface 12a side. In this case, the widths of the portions narrower than the end portion on the first inner wall surface 11a side and the end portion on the second inner wall surface 12a side may be the same or different from each other.

The cross-sectional shapes of the first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E are not particularly limited. The widths of the first porous body 31E, the second porous body 32E, the third porous body 33E, and the fourth porous body 34E may be continuously or stepwise changed.

In the vapor deposition plate of the present utility model, two or more of the shapes of the porous bodies described in the first to sixth embodiments may be combined.

Seventh embodiment

In the vapor chamber 1F shown in fig. 9, unlike the vapor chamber 1 shown in fig. 2, the porous body 30 does not include the seventh porous body 37 connected to the second end of the second porous body 32 and the second end of the third porous body 33, and the eighth porous body 38 arranged at a distance along the seventh porous body 37, and does not connect the first flow channel 51 and the third flow channel 53. As described in the first to sixth embodiments, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be other than these.

Eighth embodiment

In an eighth embodiment of the present utility model, the housing has a plurality of evaporation units.

In the vapor chamber 1G shown in fig. 10, a plurality of evaporation units EP1 and EP2 and a condensation unit CP are provided in the housing 10. As shown in fig. 10, the flow paths of the evaporation units EP1 and EP2 preferably have a higher density than the flow paths of the condensation unit CP. The number, arrangement, and size of the evaporation units are not particularly limited. As described in the first to sixth embodiments, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be other than these.

Ninth embodiment

In a ninth embodiment of the present utility model, a vapor flow path and a liquid flow path are formed along the planar shape of a housing, unlike the first to eighth embodiments.

In the soaking plate 1H shown in fig. 11, the planar shape of the frame 10A is L-shaped. As an example, the porous body 30 includes a first porous body 31, a second porous body 32, a third porous body 33, and a fourth porous body 34. A first flow path 51 is formed between the first porous body 31 and the second porous body 32, a second flow path 52 is formed between the second porous body 32 and the third porous body 33, and a third flow path 53 is formed between the third porous body 33 and the fourth porous body 34.

The porous body 30 further includes: a ninth porous body 39 connected to the second end of the first porous body 31, a tenth porous body 40 connected to the second end of the second porous body 32, an eleventh porous body 41 connected to the second end of the third porous body 33, and a twelfth porous body 42 connected to the second end of the fourth porous body 34. The ninth porous body 39, the tenth porous body 40, the eleventh porous body 41, and the twelfth porous body 42 extend in a second direction perpendicular to the thickness direction Z and intersecting the first direction. In the example shown in fig. 11, the ninth porous body 39, the tenth porous body 40, the eleventh porous body 41, and the twelfth porous body 42 are arranged to extend in the width direction X, which is one example of the second direction. A first flow path 51 is formed between the ninth porous body 39 and the tenth porous body 40, a second flow path 52 is formed between the tenth porous body 40 and the eleventh porous body 41, and a third flow path 53 is formed between the eleventh porous body 41 and the twelfth porous body 42. Accordingly, a vapor flow path and a liquid flow path are formed along the planar shape of the housing 10A.

In the soaking plate of the present utility model, the planar shape of the frame is not particularly limited, and examples thereof include polygonal shapes such as triangular shapes and rectangular shapes, circular shapes, elliptical shapes, and combinations thereof. The planar shape of the housing may be L-shaped, C-shaped (コ -shaped), or the like. The housing may have a through hole therein. The planar shape of the frame may be a shape corresponding to the use of the soaking plate, the shape of the mounting portion of the soaking plate, and other members existing in the vicinity.

Tenth embodiment

In the vapor chamber 1I shown in fig. 12, unlike the vapor chamber 1 shown in fig. 2, the fifth porous body 35 and the sixth porous body 36 extend in directions inclined with respect to the width direction X and the length direction Y.

As in the soaking plate 1I shown in fig. 12, the porous body 30 may include a porous body extending radially from the evaporation portion EP. The porous body radially extending from the evaporation portion EP is preferably connected to a first end of at least one of the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34. As described in the first to sixth embodiments, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be other than these.

Eleventh embodiment

In the eleventh embodiment of the present utility model, a plurality of struts are disposed in the second flow path so as to support the first inner wall surface and the second inner wall surface of the housing from the inside.

Fig. 13 is a plan view schematically showing an example of a soaking plate according to an eleventh embodiment of the present utility model. Fig. 14 is a cross-sectional view schematically showing an example of a soaking plate according to an eleventh embodiment of the present utility model.

In the vapor chamber 1J shown in fig. 13 and 14, unlike the vapor chamber 1A shown in fig. 4, a plurality of struts 60 are arranged in the second flow path 52. The steam flow path is interrupted between the struts 60. The stay 60 supports the first inner wall surface 11a and the second inner wall surface 12a of the housing 10 from the inside. When the number of liquid channels is small, the frame 10 can be supported by disposing the struts 60 in the steam channels. As described in the first to sixth embodiments, the shapes other than the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A may be used.

As shown in fig. 13 and 14, a plurality of struts 60 are preferably disposed in the steam flow path other than the second flow path 52.

In the example shown in fig. 14, the pillar 60 contacts the first inner wall surface 11a and the second inner wall surface 12a. The pillar 60 may be in contact with either one of the first inner wall surface 11a and the second inner wall surface 12a, or may not be in contact with the first inner wall surface 11a and the second inner wall surface 12a.

The material forming the pillar 60 is not particularly limited, and examples thereof include a resin, a metal, a ceramic, a mixture thereof, a laminate thereof, and the like. The stay 60 may be formed integrally with the housing 10, for example, by etching the inner wall surface of the first sheet 11 or the second sheet 12.

The shape of the support column 60 is not particularly limited as long as it can support the frame 10, but examples of the shape of the cross section of the support column 60 perpendicular to the height direction include a polygonal shape such as a rectangle, a circle, an oval shape, and the like.

The height of the pillars 60 is not particularly limited, and may be the same as or different from the height of the porous body 30.

The heights of the struts 60 may be the same or different in one soaking plate. For example, the height of the pillars 60 in one region may be different from the heights of the pillars 60 in other regions.

In the cross section shown in fig. 14, the width of the strut 60 is not particularly limited as long as it provides strength capable of suppressing deformation of the frame of the vapor chamber, but the equivalent circle diameter of the cross section perpendicular to the height direction of the end portion of the strut 60 is, for example, 100 μm to 2000 μm, preferably 300 μm to 1000 μm. By increasing the equivalent circle diameter of the strut 60, deformation of the frame of the vapor chamber can be further suppressed. On the other hand, by reducing the equivalent circle diameter of the strut 60, the space for the vapor movement of the working medium can be ensured to be larger.

The arrangement of the struts 60 is not particularly limited, but is preferably uniform in a predetermined region, and more preferably uniform in the whole, for example, the distance between the struts 60 is constant. By arranging the struts 60 uniformly, uniform strength can be ensured over the entire soaking plate.

Twelfth embodiment

A twelfth embodiment of the present utility model is a modification of the eleventh embodiment of the present utility model. In the twelfth embodiment of the present utility model, the height of the pillars is different from the height of the porous body in the thickness direction.

In the vapor chamber 1K shown in fig. 15, unlike the vapor chamber 1J shown in fig. 14, the height of the pillar 60 is greater than the height of the porous body 30 in the thickness direction Z. The height of the pillars 60 may be lower than the height of the porous body 30. Further, the pillars 60 having the same height as the porous body 30 may be included.

Thirteenth embodiment

In a thirteenth embodiment of the present utility model, a sixth flow path extending in the first direction is formed in the second flow path.

In the vapor chamber 1L shown in fig. 16, unlike the vapor chamber 1 shown in fig. 3, a sixth flow path 56 extending along a longitudinal direction Y, which is an example of the first direction, is formed in the second flow path 52. As described in the first to sixth embodiments, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be other than these.

In the cross section shown in fig. 16, when the width of the sixth flow path 56 is d, the relationship of d < a and d < c holds. By making d < a and d < c, the sixth flow path 56 can be used as a liquid flow path.

In the thickness direction Z, the sixth flow path 56 has a lower height than the first flow path 51, the second flow path 52, and the third flow path 53. By forming the sixth flow passage 56 in the second flow passage 52, even when the first flow passage 51 and the third flow passage, which are liquid flow passages, are broken, the operation of the vapor chamber can be ensured. In addition, resistance to mechanical stress such as bending and vibration can be improved.

The sixth flow path 56 may be provided on both the first inner wall surface 11a and the second inner wall surface 12a, or may be provided on only one of the first inner wall surface 11a and the second inner wall surface 12 a. The sixth flow path 56 may be formed by a portion protruding from the first inner wall surface 11a and the second inner wall surface 12a, for example, a columnar portion, or may be formed by a recess, for example, a groove, in the first inner wall surface 11a and the second inner wall surface 12 a.

In the cross section shown in fig. 16, the width d of the sixth flow path 56 is preferably 10 μm or more and 500 μm or less.

The height of the sixth flow path 56 in the thickness direction Z is preferably 10 μm to 100 μm.

Fourteenth embodiment

In a fourteenth embodiment of the present utility model, the shape of the frame is different.

In the vapor chamber 1M shown in fig. 17, unlike the vapor chamber 1A shown in fig. 4, the frame 10B is composed of the first sheet 11B and the second sheet 12B which are opposed to each other and joined at the outer edge portion. The first sheet 11B has a flat plate shape with a constant thickness, and the second sheet 12B has a shape with a constant thickness and a portion other than the outer edge portion protruding outward relative to the outer edge portion. As described in the first to sixth embodiments, the shapes other than the first porous body 31A, the second porous body 32A, the third porous body 33A, and the fourth porous body 34A may be used.

In a fourteenth embodiment of the present utility model, a recess is formed in an outer edge portion of the housing. Therefore, the recess can be used for mounting the vapor chamber or the like. In addition, other members or the like may be disposed in the recess of the outer edge portion.

Fifteenth embodiment

In a fifteenth embodiment of the present utility model, the first core is disposed along the first inner wall surface, or the second core is disposed along the second inner wall surface. Alternatively, both the first core and the second core are arranged.

In the vapor chamber 1N shown in fig. 18, unlike the vapor chamber 1 shown in fig. 3, the first core 71 is arranged along the first inner wall surface 11a, and the second core 72 is arranged along the second inner wall surface 12 a. As described in the first to sixth embodiments, the first porous body 31, the second porous body 32, the third porous body 33, and the fourth porous body 34 may be other than these.

In the soaking plate 1O shown in fig. 19, the first core 71 is not arranged along the first inner wall surface 11a, but the second core 72 is arranged along the second inner wall surface 12 a. Further, the second core 72 may be arranged along the first inner wall surface 11a instead of the second inner wall surface 12 a.

The first core 71 and the second core 72 are not particularly limited as long as they have a capillary structure capable of moving the working medium by capillary force. The capillary configuration of the core may be a well-known configuration used in existing vapor chamber. Examples of the capillary structure include a fine structure having irregularities such as pores, grooves, and protrusions, for example, a porous structure, a fibrous structure, a groove structure, and a mesh structure.

The material of the core is not particularly limited, and for example, a metal porous film, a mesh, a nonwoven fabric, a sintered body, a porous body, or the like formed by etching or metal processing can be used. The mesh as the material of the core may be composed of, for example, a metal mesh, a resin mesh, or a surface-coated mesh, and is preferably composed of a copper mesh, a stainless steel (SUS) mesh, or a polyester mesh. The sintered body as the material of the core may be composed of, for example, a metal porous sintered body or a ceramic porous sintered body, and preferably a porous sintered body of copper or nickel. The porous body as the material of the core may be, for example, a porous body composed of a metal porous body, a ceramic porous body, a resin porous body, or the like.

The size and shape of the first core 71 and the second core 72 are not particularly limited, but for example, the size and shape are preferably set continuously from the evaporation portion to the condensation portion in the housing 10.

The thickness of the first core 71 and the second core 72 is not particularly limited, but is, for example, 2 μm to 200 μm, preferably 5 μm to 100 μm, and more preferably 10 μm to 40 μm, respectively. The thickness of the first core 71 and the second core 72 may be partially different. The thickness of the first core 71 may be the same as or different from the thickness of the second core 72.

The vapor chamber of the present utility model can be mounted on an electronic device for the purpose of heat dissipation. Therefore, an electronic device including the vapor chamber of the present utility model is also one of the present utility model. Examples of the electronic device of the present utility model include a smart phone, a tablet terminal, a notebook computer, a game machine, and a wearable device. As described above, the vapor chamber of the present utility model operates independently without external power, and can spread heat in two dimensions and at high speed by utilizing the latent heat of evaporation and the latent heat of condensation of the working medium. Therefore, by the electronic device having the vapor chamber of the present utility model, heat dissipation can be effectively realized in a limited space inside the electronic device.

Industrial applicability

The vapor chamber of the present utility model can be used for a wide variety of applications in the field of portable information terminals and the like. For example, the device can be used for reducing the temperature of a heat source such as a CPU, prolonging the service life of an electronic device, and can be used for a smart phone, a tablet personal computer, a notebook PC, and the like.

Description of the reference numerals

1. 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M, 1N, 1O. 10. 10A, 10b. a frame; 11. first sheet; a first inner wall surface; 12. second sheet; a second inner wall surface; working medium; porous body; 31. 31A, 31B, 31C, 31D, 31E. 32. 32A, 32B, 32C, 32D, 32E. 33. 33A, 33B, 33C, 33D, 33E. 34. 34A, 34B, 34C, 34D, 34E. Fifth porous body; sixth porous body; seventh porous body; eighth porous body; ninth porous body; 40. tenth porous body; eleventh porous body; twelfth porous body; 51. a first flow path; a second flow path; 53. third flow path; 54. a fourth flow path; 55. fifth flow path; 56. sixth flow path; struts; 71. the first core; 72. the second core; width of the first flow path; width of the second flow path; width of the third flow path; width of the sixth flow path; cp. coagulation; EP, EP1, EP 2; HS. the heat source; x. widthwise; y. lengthwise; z.

Claims

1. A soaking plate is characterized by comprising:

a frame body having a first inner wall surface and a second inner wall surface facing each other in a thickness direction;

a working medium enclosed in an inner space of the housing; and

a plurality of porous bodies disposed in the inner space of the frame body and supporting the first inner wall surface and the second inner wall surface of the frame body from the inside,

the porous body includes a first porous body, a second porous body, a third porous body, and a fourth porous body extending from respective first end portions to second end portions along a first direction perpendicular to the thickness direction,

in a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body are arranged in this order, and when a width of a first flow path formed between the first porous body and the second porous body is a, a width of a second flow path formed between the second porous body and the third porous body is b, and a width of a third flow path formed between the third porous body and the fourth porous body is c, a < b and c < b are established.

2. A vapor chamber according to claim 1,

In a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body are each not constant in width in the thickness direction.

3. A vapor chamber according to claim 1,

in a cross section perpendicular to the first direction, the width of the end portion on the second inner wall surface side of each of the first porous body, the second porous body, the third porous body, and the fourth porous body is narrower than the width of the end portion on the first inner wall surface side.

4. A vapor chamber according to claim 1,

in a cross section perpendicular to the first direction, the widths of the first porous body, the second porous body, the third porous body, and the fourth porous body each continuously narrow as going from the end on the first inner wall surface side toward the end on the second inner wall surface side.

5. A vapor chamber according to claim 1,

in a cross section perpendicular to the first direction, the widths of the first porous body, the second porous body, the third porous body, and the fourth porous body each become narrower stepwise from the end on the first inner wall surface side toward the end on the second inner wall surface side.

6. A vapor chamber as claimed in any one of claims 3 to 5,

the first porous body and the end portion of the second porous body on the first inner wall surface side are connected to each other,

the end portions of the third porous body and the fourth porous body on the first inner wall surface side are connected to each other.

7. A vapor chamber according to claim 1,

in a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body have a portion having a width wider than the first inner wall surface side end and the second inner wall surface side end between the first inner wall surface side end and the second inner wall surface side end, respectively.

8. A vapor chamber according to claim 1,

in a cross section perpendicular to the first direction, the first porous body, the second porous body, the third porous body, and the fourth porous body have portions having widths narrower than the first inner wall surface side end and the second inner wall surface side end between the first inner wall surface side end and the second inner wall surface side end, respectively.

9. A vapor chamber according to any one of claims 1 to 5,

in a cross section perpendicular to the first direction, a width a of the first channel is 50 μm or more and 500 μm or less, a width b of the second channel is 1000 μm or more and 3000 μm or less, and a width c of the third channel is 50 μm or more and 500 μm or less.

10. A vapor chamber according to any one of claims 1 to 5,

the pore diameters of the first porous body, the second porous body, the third porous body, and the fourth porous body are 50 μm or less, respectively.

11. A vapor chamber according to any one of claims 1 to 5,

in a cross section perpendicular to the first direction, the widths of the first porous body, the second porous body, the third porous body, and the fourth porous body are respectively 5 μm to 500 μm.

12. A vapor chamber according to any one of claims 1 to 5,

in a cross section perpendicular to the first direction, the heights of the first porous body, the second porous body, the third porous body, and the fourth porous body are respectively 20 μm to 300 μm.

13. A vapor chamber according to any one of claims 1 to 5,

the frame body has an evaporation unit for evaporating the sealed working medium and a condensation unit for condensing the evaporated working medium,

the density of the flow paths at the evaporation portion is higher than the density of the flow paths at the condensation portion.

14. The vapor chamber of claim 13,

the frame body is provided with a plurality of evaporation parts.

15. A vapor chamber according to any one of claims 1 to 5,

the soaking plate further includes a plurality of struts which are disposed in the second flow path and support the first inner wall surface and the second inner wall surface of the frame from the inside.

16. The vapor chamber of claim 15,

in the thickness direction, the height of the pillar is higher than the height of the porous body.

17. A vapor chamber according to any one of claims 1 to 5,

the porous body further includes: a fifth porous body connected to the first end of the second porous body and the first end of the third porous body, and a sixth porous body disposed at a spacing along the fifth porous body,

A fourth flow path formed between the fifth porous body and the sixth porous body is connected to the first flow path and the third flow path.

18. A vapor chamber according to any one of claims 1 to 5,

the porous body further includes: a seventh porous body connected to the second end of the second porous body and the second end of the third porous body, and eighth porous bodies arranged at a spacing along the seventh porous body,

a fifth flow path formed between the seventh porous body and the eighth porous body is connected to the first flow path and the third flow path.

19. A vapor chamber according to any one of claims 1 to 5,

the porous body further includes: a ninth porous body connected to the second end of the first porous body, a tenth porous body connected to the second end of the second porous body, an eleventh porous body connected to the second end of the third porous body, and a twelfth porous body connected to the second end of the fourth porous body,

the ninth porous body, the tenth porous body, the eleventh porous body, and the twelfth porous body extend along a second direction perpendicular to the thickness direction and intersecting the first direction.

20. A vapor chamber according to any one of claims 1 to 5,

a sixth flow path extending along the first direction is formed in the second flow path,

in a cross section perpendicular to the first direction, when the width of the sixth flow path is d, a relationship of d < a and d < c is established,

in the thickness direction, the sixth flow path has a height lower than the heights of the first flow path, the second flow path, and the third flow path.

21. A vapor chamber according to any one of claims 1 to 5,

the frame is formed by joining an outer edge portion of a first sheet having the first inner wall surface to an outer edge portion of a second sheet having the second inner wall surface,

the first sheet is in the shape of a flat plate with constant thickness,

the second sheet has a shape in which the outer edge portion is thicker than a portion other than the outer edge portion.

22. A vapor chamber according to any one of claims 1 to 5,

the first sheet is in the shape of a flat plate with constant thickness,

The second sheet has a constant thickness, and a portion other than the outer edge portion protrudes outward from the outer edge portion.

23. A vapor chamber according to any one of claims 1 to 5,

the soaking plate further includes at least one of a first core disposed along the first inner wall surface and a second core disposed along the second inner wall surface.

24. An electronic device, characterized in that,

the electronic device includes the vapor chamber according to any one of claims 1 to 23.