CN110779365A - An inflatable aluminum vapor chamber with diverse heat source distribution - Google Patents

Abstract

The invention discloses a blown-up aluminum temperature-uniforming plate with various heat source distributions, which comprises a shell; at least two independently distributed sealing cavities are arranged in the shell, working media are pumped in the sealing cavities in a vacuum mode and injected into the sealing cavities, and a plurality of channels are arranged in the sealing cavities. According to the invention, the working medium is more uniformly distributed in the shell by arranging the plurality of independent sealing cavities, so that the distribution limitation on the heat sources is reduced, and the heat source distribution mode is more diversified, such as that a plurality of heat sources with the same power are uniformly distributed or a plurality of heat sources with different powers are distributed as required.

Description

An inflatable aluminum vapor chamber with diverse heat source distribution

technical field

The invention relates to the technical field of the field of electronic heat sinks, in particular to an inflatable aluminum temperature equalizing plate with various heat source distributions.

Background technique

With the improvement of the performance of various communication and electronic products, the power of the chip is getting higher and higher, the heat flow density is also higher and higher, and the required heat dissipation area is larger, but at the same time, it is limited by space and weight, and the heat dissipation area of the radiator is also Limited to the specified range, in order to solve the problem of heat dissipation, only the thermal conductivity of the heat sink itself can be improved.

The inflatable temperature equalizing plate includes a shell, the shell is evacuated and filled with working medium, and a channel obtained by inflation is also arranged in the shell, and the working medium is evaporated and condensed in the channel. The heat source is in contact with the inflatable vapor chamber to dissipate heat from the heat source.

The inflatable vapor chamber has a simple structure and can realize two-dimensional conduction, but the inflatable vapor chamber has no capillary structure, and the condensed working medium can only return to the bottom of the shell under the action of gravity. Therefore, the high-power heat source must be at the bottom, and the low-power heat source is placed on the top, and the distribution of the heat source is limited by the structure of the inflatable vapor chamber.

However, in real scenarios, many heat sources cannot be completely designed at the bottom. Therefore, the working medium inside the inflatable vapor chamber must be filled with more than 60% of the volume of the entire channel. However, after the amount of working fluid increases, the temperature of the entire inflatable vapor chamber will be uneven, the heat dissipation capacity will decrease, the heat source above will not be well cooled, and it will work at high temperature for a long time, which will lead to chip burnout or high temperature alarm and shutdown. .

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to propose an inflatable aluminum temperature equalizing plate with diverse heat source distribution based on the above-mentioned deficiencies of the prior art, which solves the problem that multiple heat sources of the same power cannot be uniformly distributed and dissipated.

The technical scheme of the present invention is realized as follows:

An inflatable aluminum temperature equalizing plate with various heat source distributions, comprising a casing; at least two independently distributed sealing chambers are arranged in the casing, the sealing chambers are evacuated and filled with working medium, and the sealing chambers are evacuated and filled with working fluid. A plurality of channels are provided in the cavity.

In a further technical solution, the distances between the sealed cavities are the same or different.

In a further technical solution, the volumes in the sealed cavity are the same or different.

In a further technical solution, the volume of the working fluid in the sealed cavity is the same or different.

In a further technical solution, at least two of the sealed cavities are distributed up and down, and one side of the casing is the heat source end.

In a further technical solution, the channel includes a drainage channel, the drainage channel is inclined, and the inclination direction is inclined from high to low to the heat source end; the condensed working medium flows along the drainage channel to the heat source end. ; The evaporated working medium is away from the heat source end along the drainage channel.

In a further technical solution, the channel includes a backflow channel, the backflow channel is arranged on the side of the sealed cavity close to the heat source end, and the backflow channel is connected to the lower ports of the plurality of drainage channels; The working medium flows out from the lower ports of the plurality of drainage channels, and enters the reflux channel for collection and reflux.

In a further technical solution, the channel includes a diffusion channel, the diffusion channel is arranged on the side of the sealed cavity away from the heat source end, and the diffusion channel is connected to the upper ports of the plurality of drainage channels; The working medium diffuses out from the upper ports of the plurality of drainage channels, and enters the diffusion channels to collect and diffuse.

In a further technical solution, the drainage channel is connected with at least one shunt channel, and the upper drainage channel is communicated with the lower drainage channel through the shunt channel; the condensed working medium flows into the lower drainage channel along the shunt channel; evaporation The latter working medium diffuses into the upper drainage channel along the shunt channel.

In a further technical solution, the upper and lower adjacent shunt channels are mutually dislocated and distributed.

Adopting the above-mentioned technical scheme, the beneficial effects of the present invention are:

(1) By setting up multiple independent sealed cavities, the distribution of the working fluid in the shell is more uniform, thereby reducing the distribution restrictions on the heat source, and the heat source distribution methods are more diverse, such as multiple heat sources of the same power evenly distributed, or multiple heat sources. Heat sources of different power are distributed on demand.

(2) According to the location requirements of the heat source, the spacing between the sealed cavities can be set to be the same or different, and the spacing distance can also be set to achieve a variety of heat source distribution methods.

(3) According to the contact area requirements between the heat source and the shell, the volume of the sealed cavity can be set to be the same or different, and the volume can also be adapted to achieve a variety of heat source distribution methods.

(4) According to the power requirements of the heat source, the volume of the working fluid in the sealed cavity can be set to be the same or different, and the volume of the working fluid can be adjusted to achieve a variety of heat source distribution methods.

(5) By setting a drainage channel inclined from high to low to the heat source end, the condensed working medium is guided to the heat source end with a shorter path, and the evaporated working medium is led away from the heat source end with a shorter path to reduce the sealing effect. The temperature difference between the left and right of the cavity improves the heat dissipation performance; at the same time, it is also very good to supplement the condensed working fluid to the upper part of the sealed cavity near the heat source end, which is beneficial to take away the heat of the upper heat source and effectively reduce the temperature of the upper heat source, thereby reducing the The temperature difference between the top and bottom of the sealed cavity improves the heat dissipation performance.

(6) The reflux channel can concentrate the working fluid after cold flow, and the diffusion channel can concentrate the working fluid after evaporation, effectively separating the vapor and liquid, so that the working fluid can be rapidly condensed and evaporated, and the heat dissipation performance is improved.

(7) The shunt channel can provide sufficient space to make the evaporated working fluid diffuse upwards evenly, thereby reducing the temperature difference in the sealed cavity and improving the heat dissipation performance.

(8) The dislocation distribution of the upper and lower adjacent shunt channels can make the working fluid after cold flow always flow in one or more drainage channels, and finally lead to the heat source end, so as to avoid the working fluid after cold flow along the edge of gravity under the action of gravity. The channel flows straight down to the bottom of the seal chamber.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of the first embodiment.

FIG. 2 is an enlarged view of M in FIG. 1 .

FIG. 3 is a schematic structural diagram of the second embodiment.

FIG. 4 is a schematic structural diagram of a third embodiment.

In FIGS. 1 and 2 , the direction of the solid line arrow is the direction of movement of the working medium after condensation, and the direction of the dashed line arrow is the direction of movement of the working medium after evaporation.

In the figure, 10-shell, 11-heat source end, 12-working medium, 13-channel, 14-sealed cavity, 21-first heat source, 22-second heat source, 23-third heat source, 24-fourth heat source , 31 - drainage channel, 32 - return channel, 33 - diffusion channel, 34 - shunt channel.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 , in the first embodiment provided by the present invention, an inflatable aluminum vapor chamber with various heat sources includes a casing 10 ; the casing 10 is provided with two independently distributed sealed cavities 14 . The two sealed cavities 14 are distributed up and down, and one side of the casing 10 is the heat source end 11 . The sealed cavity 14 is evacuated and filled with the working medium 12 , and a plurality of channels 13 are arranged in the sealed cavity 14 .

In the first embodiment, the volume of the sealed cavity 14 is the same, the volume of the working medium 12 in the sealed cavity 14 is the same, and the distance between the sealed cavity 14 is set according to the position of the heat source.

In application: the first heat source 21 , the second heat source 22 , the third heat source 23 , and the fourth heat source 24 are evenly distributed on the heat source end 11 , and the power of the four heat sources is the same, which realizes the uniform distribution of the heat sources.

The channel 13 includes a drainage channel 31. The drainage channel 31 is inclined and the direction of inclination is from high to low to the heat source end 11; the condensed working medium 12 flows to the heat source end 11 along the drainage channel 31; the evaporated working medium 12 flows along the drainage channel 11. The channel 31 is away from the heat source end 11 .

As shown in FIG. 2 , the channel 13 includes a return channel 32 , which is arranged on the side of the sealed cavity 14 close to the heat source end 11 , and the return channel 32 communicates with the lower ports of the plurality of drainage channels 31 ; the condensed working fluid 12 flows out from the lower ports of the plurality of drainage channels 31 and enters the return channel 32 to collect the return flow. In the first embodiment, the return channel 32 is arranged perpendicular to the horizontal plane of the working medium 12 . It should be noted that the partially evaporated working medium 12 may also diffuse in the backflow channel 32 .

The channel 13 includes a diffusion channel 33. The diffusion channel 33 is disposed on the side of the sealed cavity 14 away from the heat source end 11. The diffusion channel 33 communicates with the upper ports of the plurality of drainage channels 31; The upper port of 31 diffuses out, and enters the diffusion channel 33 to collect and diffuse. In the first embodiment, the diffusion channel 33 is arranged perpendicular to the horizontal plane of the working medium 12 . It should be noted that the partially condensed working medium 12 may also flow downward in the diffusion channel 33 .

The drainage channel 31 is connected with at least one shunt channel 34, and the upper drainage channel 31 communicates with the lower drainage channel 31 through the shunt channel 34; the condensed working medium 12 flows into the lower drainage channel 31 along the shunt channel 34; the evaporated working medium 12 diffuses into the upper drainage channel 31 along the shunt channel 34 . The upper and lower adjacent shunt channels 34 are dislocated and distributed relative to each other.

As shown in FIG. 3 , in the second embodiment provided by the present invention, an inflatable aluminum vapor chamber with various heat sources is distributed. The difference from the first embodiment is that in the second embodiment, there are three sealed cavities 14 , and six heat sources of equal power can be provided at the heat source end 11 .

As shown in FIG. 4 , in the third embodiment provided by the present invention, an inflatable aluminum vapor chamber with various heat sources is distributed. The difference from the first embodiment is that in the third embodiment, the width and quantity of the drainage channel 31 , the return channel 32 , the diffusion channel 33 and the distribution channel 34 are different.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. An inflatable aluminum temperature equalizing plate with diverse heat source distribution, comprising a casing; characterized in that: the casing is provided with at least two independently distributed sealing cavities, and the sealing cavities are evacuated and filled with The working medium is provided with a plurality of channels in the sealed cavity. 2 . The inflatable aluminum vapor chamber with various heat source distributions according to claim 1 , wherein the distances between the sealed cavities are the same or different. 3 . 3 . The inflatable aluminum vapor chamber with various heat source distributions according to claim 1 , wherein the volumes in the sealed chambers are the same or different. 4 . 4 . The inflatable aluminum vapor chamber with various heat source distributions according to claim 1 , wherein the volume of the working medium in the sealed cavity is the same or different. 5 . 5 . The inflatable aluminum temperature equalizing plate with various heat source distributions according to claim 1 , wherein at least two of the sealed cavities are distributed up and down, and one side of the casing is the heat source end. 6 . 6 . The inflatable aluminum temperature equalizing plate with various heat source distributions according to claim 5 , wherein the channel includes a drainage channel, and the drainage channel is arranged obliquely, and the inclination direction is from high to low to all directions 6 . The heat source end is inclined; the condensed working medium flows to the heat source end along the drainage channel; the evaporated working medium moves away from the heat source end along the drainage channel. 7 . The inflatable aluminum vapor chamber with various heat source distributions according to claim 6 , wherein the channel includes a return channel, and the return channel is arranged in the sealed cavity and close to the heat source end. 8 . On one side, the reflux channel is connected to the lower ports of the plurality of drainage channels; the condensed working medium flows out from the lower ports of the plurality of drainage channels, and enters the reflux channel to be collected and refluxed. 8 . The inflatable aluminum vapor chamber with various heat source distributions according to claim 6 , wherein the channel includes a diffusion channel, and the diffusion channel is disposed in the sealed cavity away from the end of the heat source. 9 . On one side, the diffusion channel communicates with the upper ports of the plurality of drainage channels; the evaporated working medium diffuses from the upper ports of the plurality of drainage channels, and enters the diffusion channels for collection and diffusion. 9 . The inflatable aluminum temperature equalizing plate with various heat source distributions according to claim 6 , wherein the drainage channel is connected with at least one shunt channel, and the upper drainage channel passes through the shunt channel and the lower drainage channel. 10 . connected; the condensed working medium flows into the lower drainage channel along the shunt channel; the evaporated working medium diffuses into the upper drainage channel along the shunt channel. 10 . The inflatable aluminum temperature equalizing plate with various heat source distributions according to claim 9 , wherein the upper and lower adjacent shunt channels are dislocated and distributed with each other. 11 .

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