HEAT DISSIPATION DEVICE

A heat dissipation device is configured for a working fluid to flow therethrough. The heat dissipation device includes a base, at least one heat dissipation fin, and at least one fluid replenisher. The base has at least one internal channel configured for the working fluid to flow therethrough. The at least one heat dissipation fin having an extension channel and an inlet and an outlet is in fluid communication with the extension channel. The at least one heat dissipation fin is inserted into one side of the base, and the extension channel is communicated with the at least one internal channel through the inlet and the outlet. The at least one fluid replenisher is connected to at least one internal channel.

CROSS-REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 109146305 filed in Taiwan, R.O.C. on Dec. 25, 2020, the entire contents of which are hereby incorporated by reference.

TECHNICAL FIELD

This disclosure relates to a heat dissipation device, especially to a liquid-cooled heat dissipation device.

BACKGROUND

The increase in waste heat generated as the speed and frequency in electronic components are increasing. The typical heat sinks with fins made by aluminum extrusion or die-casting process have very limited surface areas, and thus its convection of the surrounding air is not as expected, even a fan is added. For this reason, the heat-sink cooling approaches are no longer suitable for dealing with the growing cooling demand.

SUMMARY

Accordingly, this disclosure provides a heat dissipation device with improved heat dissipation efficiency.

According to one or more embodiment of this disclosure, a heat dissipation device configured for a working fluid to flow therethrough comprises: a base having at least one internal channel configured for the working fluid to flow therethrough; at least one heat dissipation fin having an extension channel and an inlet and an outlet in fluid communication with the extension channel, wherein the at least one heat dissipation fin is inserted into one side of the base, and the extension channel is in fluid communication with the at least one internal channel and the outlet through the inlet; and at least one fluid replenisher connected to at least one internal channel.

According to the heat dissipation devices discussed in the previous embodiments, the internal channel of the base and the extension channel of the heat dissipation fin are in fluid communication with each other, thus working fluid will naturally circulate therethrough when absorbing heat, forming a three-dimensional heat transfer over the base as well as the heat dissipation fin. As such, the overall heat dissipation efficiency is improved.

DETAILED DESCRIPTION

In addition, the terms used in the present disclosure, such as technical and scientific terms, have its own meanings and can be comprehended by those skilled in the art, unless the terms are additionally defined in the present disclosure. That is, the terms used in the following paragraphs should be read on the meaning commonly used in the related fields and will not be overly explained, unless the terms have a specific meaning in the present disclosure.

Please refer toFIGS.1to4, whereFIG.1is a stereoscopic view of a heat dissipation device10according to the first embodiment of the present disclosure,FIG.2is an exploded view of the heat dissipation device10,FIG.3is a partial cross-sectional view of the heat dissipation device10, andFIG.4is another partial cross-sectional view of the heat dissipation device10.

The heat dissipation device10is configured for a working fluid (not shown) to flow therethrough. The working fluid may be water, refrigerant, or any other suitable coolant. The heat dissipation device10comprises a base100, a plurality of heat dissipation fins200, and two fluid replenishers300.

The base100has at least one internal channel S. The internal channel S is configured for the working fluid (not shown) to flow therethrough. In detail, the base100has a first side surface110, a second side surface120, an accommodation recess111, and a plurality of assembling slots130. The accommodation recess111is located at the first side surface110and is configured for accommodating a heat source (not shown). The second side surface120faces away from the first side surface110. The assembling slots130are located at the second side surface120. In this embodiment, the base100may further have two join slots150in fluid communication with the internal channel S.

The heat dissipation fins200each have an extension channel201, and an outlet202and an inlet203in fluid communication with the extension channel201. The extension channel201may be, for example, in a grid shape. The heat dissipation fins200are inserted into one side of the base100, and each of the extension channels201is in fluid communication with at least one of the internal channels S through the outlet202and the inlet203.

In this embodiment, the second side surface120has a first holding part121, a second holding part122, and a third holding part123. Two opposite sides of the second holding part122are respectively connected to the first holding part121and the third holding part123, the second holding part122is located closer to the first side surface110than the first holding part121, and the first holding part121is located closer to the first side surface110than the third holding part123. The assembling slots130are arranged over the first holding part121, the second holding part122, and the third holding part123. The heat dissipation fins each200has a cold side210and a hot side220located opposite to each other. The hot side220has a first part221, a second part222, and a third part223. The first part221, the second part222, and the third part223respectively contact the first holding part121, the second holding part122, and the third holding part123.

The fluid replenishers300are respectively disposed at the join slots150so that the fluid replenishers300are located at the two opposite sides of the base100and are in fluid communication with the internal channel S. The heat transfer of the working fluid (not shown) occurs at the internal channel S and the extension channel201so that the working fluid can circulate throughout the internal channel S and the extension channel201. Since the heat transferring of the working fluid happens naturally, the circulation can occur with the absence of capillary structure.

Note that the quantities of the assembling slots130and the heat dissipation fins200can be modified as required; for example, the of other embodiments may only have one assembling slot130and one heat dissipation fin200. Furthermore, in this embodiment, each of the quantities of two join slots150and the fluid replenishers300are two, but they can be modified as required; for example, the other embodiments may have only one join slots150and one fluid replenisher300.

As shown inFIG.4, the internal channel S of the embodiment has an inlet part Si, an outlet part So, a first channel part S1, a second channel part S2, a third channel part S3, a first connecting part S4, and a second connecting part S5. The first channel part S1and the third channel part S3are respectively in fluid communication with the inlet part Si and the outlet part So, and two opposite ends of the second channel part S2are respectively in fluid communication with the first channel part S1and the third channel part S3via the first connecting part S4and the second connecting part S5, the second channel part S2is located closer to the first side surface110than the first channel part S1, and the first channel part S1is located closer to the first side surface110than the third channel part S3. The fluid replenisher300is in fluid communication with the first channel part S1to keep the capacity of the working fluid in the internal channel S and the extension channel201.

The heat dissipation device10may be placed vertically during operation. In this position, the second channel part S2is located higher than the first channel part S1, and the third channel part S3is located higher than the second channel part S2. That is, the horizontal height of the second channel part is higher than the horizontal height of the first channel part, and the horizontal height of the third channel part is higher than the horizontal height of the second channel part. In addition, the flow resistance of the first channel part S1is smaller than that of the inlet part Si and the outlet part So, and the fluid pressure in the extension channel201of the heat dissipation fin200is larger than that in the internal channel S of the base100, thus the working fluid will be circulated as indicated by the arrows F1-F7due to the influences of the natural heat convection and the force of gravity. The above comparisons of the flow resistance are determined by comparing the sizes of the cross-sections of the channels. In one example, the horizontal cross-section of the first channel part S1is greater than the vertical cross-section of the inlet part Si and the outlet part So, thus the flow resistance of the first channel part S1is determined to be smaller than that of the inlet part Si and the outlet part So.

In the embodiment, the fluid replenisher300is in fluid communication with the first channel part S1via the first channel part S1; that is, the fluid replenisher300is close to the lower part of the internal channel S, but the location of the fluid replenisher300may be changed as required. In other embodiment, the fluid replenisher300may be arranged to be in fluid communication with the third channel part S3so as to be located close to the upper part of the internal channel S.

In this embodiment, the extension directions of the first channel part S1, the second channel part S2, and the third channel part S3are different from the extension directions of the first connecting part S4and the second connecting part S5. For instance, the extension directions of the first channel part S1, the second channel part S2and the third channel part S3are substantially perpendicular to the extension directions of the first connecting part S4and the second connecting part S5. The term “substantially” may or may not import a sense of an approximation to the phrases. Note that the extension directions of the first channel part S1, the second channel part S2, the third channel part S3, the first connecting part S4, and the second connecting part S5all can be modified as required. In other embodiment, the first connecting part and the second connecting part may be at an acute angle to the first channel part, the second channel part, the third channel part.

In this embodiment, the base100has a first surface112, a second surface113, and a third surface114which are located at the bottom of the accommodation recess111. The first surface112, the second surface113, and the third surface114respectively correspond to the first channel part S1, the second channel part S2, and the third channel part, two opposite sides of the second surface113are connected to the first surface112and the second surface113, the second surface113is located closer to the first side surface110than the first surface112, and the first surface112is located closer to the first side surface110than the third surface114. The first surface112, the second surface113, and the third surface114are respectively for being in thermal contact with different heat source.

In this embodiment, a width D1of the first channel part S1is larger than a width D2of the second channel part S2, and a width D3of the third channel part S3is larger than the width D1of the first channel part S1. Furthermore, widths D4and D5of the first connecting part S4and the second connecting part S5are larger than the width D3of the third channel part S3.

According to the heat dissipation devices discussed in the previous embodiments, the internal channel of the base and the extension channel of the heat dissipation fin are in fluid communication with each other, thus working fluid will naturally circulate therethrough when absorbing heat, forming a three-dimensional heat transfer over the base as well as the heat dissipation fin. As such, the overall heat dissipation efficiency is improved.