ONE-PIECE FORMED METAL HEAT DISSIPATION PLATE AND HEAT DISSIPATION DEVICE HAVING SAME

A one-piece formed metal heat dissipation plate includes a substrate and multiple heat dissipation strips arranged in a longitudinal direction. The substrate includes a first surface and a second surface arranged opposite to each other. Each of the heat dissipation strips includes two connection ends connected to the first surface, at least two ridge portions arranged between the two connection ends, and multiple concave-convex tooth portions formed on at least one side of at least one of the ridge portions. A cut slot is defined in the substrate corresponding to the at least two ridge portions of each heat dissipation strip, and the cut slot penetrates the first surface and the second surface.

FIELD OF DISCLOSURE

The present invention provides a heat dissipation structure. The heat dissipation structure particularly refers to a one-piece formed metal heat dissipation plate and a heat dissipation device using the same, in which more ridge portions are formed in a same unit area to improve heat dissipation.

DESCRIPTION OF RELATED ART

In order to quickly remove heat generated by a heat dissipation source, conventional heat dissipation structures comprise components such as water coolers, heat pipes, fans, or fins. However, if the above-mentioned multiple components are not well connected to each other, heat dissipation effects are compromised. In solution, there is a conventional heat dissipation device provided on the market, which is one-piece formed and composed of a heat dissipation plate and a plurality of heat dissipation strips. The heat dissipation plate is made of a metal material, and the heat dissipation strips are cut from the heat dissipation plate and then the heat dissipation strips are stamped (also known as pressed) to extend and protrude from one side of the heat dissipation plate. Accordingly, production costs are reduced, and a heat dissipation area of the heat dissipation plate is increased.

However, conventional one-piece formed heat dissipation devices have some shortcomings. The main reasons are as follows: First, when the heat dissipation plate is stamped to form the heat dissipation strips, a stamping stress is concentrated at connection positions between the heat dissipation plate and the heat dissipation strips. These connection positions are often too thin and prone to break, which not only easily damages the heat dissipation strips, but also limits an extended length of the heat dissipation strip. As a result, the heat dissipation area cannot be increased. Secondly, because the heat dissipation strips on the heat dissipation plate are disposed at intervals and arranged according to height, such a structural design not only is difficult to achieve mass production, but also causes deformation and warpage of the heat dissipation plate due to an uneven stamping stress resulting from a stamping process. Therefore, the existing heat dissipation structure cannot meet the market demand, and has the deficiency of insufficient heat dissipation.

In view of this, the inventor of the present invention focused on the above-mentioned problems in conventional techniques, and concentrated on research and scientific theory to solve these problems.

SUMMARY

It is an objective of the present invention to provide a one-piece formed metal heat dissipation plate and a heat dissipation device having the same, which lowers an overall height, and can be used and installed in a small space (less restricted by a space). Moreover, by means of a heat dissipation strip with multiple ridge portions, the present invention has an increased surface heat dissipation area in a same unit area, which facilitates mass production and improves heat dissipation.

The present invention provides a one-piece formed metal heat dissipation plate, comprising: a substrate and a plurality of heat dissipation strips arranged in a longitudinal direction. The substrate comprises a first surface and a second surface arranged opposite to each other. Each of the heat dissipation strips comprises two connection ends connected to the first surface, at least two ridge portions between the two connection ends, and a plurality of concave-convex tooth portions formed on at least one side of at least one of the ridge portions. A cut slot is defined in the substrate corresponding to the at least two ridge portions of each of the heat dissipation strips, and the cut slot penetrates the first surface and the second surface.

According to one embodiment, each of the ridge portions comprises at least one peak portion and at least one trough portion connected to the adjacent peak portion, each peak portion is triangular-shaped or arc-shaped, and each trough portion is triangular-shaped or arc-shaped, or is a plane parallel to the first surface.

According to one embodiment, in each heat dissipation strip, a ridge height is defined between the highest peak portion and the lowest trough portion of each of the at least two ridge portions, the ridge heights gradually increase in the longitudinal direction, an amplitude of each ridge portion also gradually increases in the longitudinal direction, and a height difference is defined between the lowest trough portion of each ridge portion and the first surface.

According to one embodiment, in each heat dissipation strip, a ridge height is defined between the highest peak portion and the lowest trough portion of each of the at least two ridge portions, the ridge heights are equal in the longitudinal direction, an amplitude of each ridge portion is also equal in the longitudinal direction, and a height difference is defined between the lowest trough portion of each ridge portion and the first surface.

According to one embodiment, copper or copper alloy is disposed on the first surface and each of the heat dissipation strips, and the copper or the copper alloy is also disposed on each ridge portion having the concave-convex tooth portions and is located on a surface opposite to the concave-convex tooth portions.

According to one embodiment, the substrate and each heat dissipation strip are made of aluminum or aluminum alloy, and each of the concave-convex tooth portions is triangular-shaped, rectangular-shaped, arc-shaped, or a combination thereof.

The present invention further provides a heat dissipation device, comprising at least a one-piece formed metal heat dissipation plate and an electronic device installed on one side of the metal heat dissipation plate. The heat dissipation device comprises: a base and a plurality of heat dissipation strips. The base comprises a plurality of substrates, wherein each of the substrates comprises a first surface and a second surface arranged opposite to each other. Each of the heat dissipation strips comprises two connection ends connected to the first surface, at least two ridge portions arranged between the two connection ends, and a plurality of concave-convex tooth portions formed on at least one side of each of the at least two ridge portions. A cut slot is defined in the substrate corresponding to the at least two ridge portions, and the cut slot penetrates the first surface and the second surface.

According to one embodiment, the base further comprises a connection plate connecting the substrates, and the connection plate and the outermost two of the substrates together form a horseshoe shape.

According to one embodiment, the ridge portion comprises at least one peak portion and at least one trough portion, the peak portion is triangular-shaped or arc-shaped, and each wave trough is triangular-shaped or arc-shaped, or is a plane parallel to the first surface.

According to one embodiment, in each heat dissipation strip, a ridge height is defined between the highest peak portion and the lowest trough portion of each of the at least two ridge portions, and the ridge heights gradually increase in the longitudinal direction, so that an amplitude of each ridge portion also gradually increases in the longitudinal direction.

According to one embodiment, in each heat dissipation strip, a ridge height is defined between the highest peak portion and the lowest trough portion of each of the at least two ridge portions, the ridge heights are equal in the longitudinal direction, and an amplitude of each ridge portion is also equal in the longitudinal direction.

According to one embodiment, copper or copper alloy is disposed on the first surface and each of the heat dissipation strips, and the copper or the copper alloy is disposed on each ridge portion having the concave-convex tooth portions and is located on a surface opposite to the concave-convex tooth portions.

According to one embodiment, the base and each heat dissipation strip are made of aluminum or aluminum alloy, and each of the concave-convex tooth portions is triangular-shaped, rectangular-shaped, arc-shaped, or a combination thereof.

The present invention provides the one-piece formed metal heat dissipation plate and the heat dissipation device using the same. By having the low-height/high-density-arrangement ridge portions and the concave-convex tooth portions, the ridge portions have a low overall height, are many in number, and are easy to produce. As a result, a surface heat dissipation area in a same unit area is increased, so the surface heat dissipation area and heat dissipation can be effectively improved. Therefore, in the embodiment, the concave-convex tooth portions are used to spread a stamping stress originally concentrated on the two connection ends of the metal heat dissipation plate to the entire heat dissipation strip, so the ridge portions of the heat dissipation strip are more easily extended and deformed. In addition, the stamping stress generated by stamping can also be released by the cut slot having a longer length, so the stamping stress is not just concentrated on the two connection ends of the metal heat dissipation plate to cause deformation and warpage. Furthermore, the concave-convex tooth portions can improve extensibility of the ridge portions of each heat dissipation strip, and reduces a risk that the heat dissipation strip easily breaks during processing. Therefore, the metal heat dissipation plate of the present embodiment does not generate any waste and has low production costs. The one-piece formed metal heat dissipation plate with multiple ridge portions and multiple concave-convex tooth portions greatly increases the surface heat dissipation area to improve heat dissipation, and also facilitates mass production.

DETAILED DESCRIPTION OF EMBODIMENTS

Please refer to the accompanying drawings, in which same reference numerals/letters represent the same components or similar components, and working principles of the present disclosure are described using examples in a suitable environment. The following descriptions are provided with reference to specific embodiments of the present disclosure, and should not be construed as limiting other embodiments of the present disclosure that are not specified herein.

As shown inFIG.1AandFIG.1B, the present invention provides a one-piece formed metal heat dissipation plate100, comprising: a substrate110and a plurality of heat dissipation strips120arranged in a longitudinal direction. The substrate110includes a first surface102and a second surface104disposed opposite to each other. Each heat dissipation strip120includes two connection ends106connected to the first surface102, at least two ridge portions126arranged between the two connection ends106, and a plurality of concave-convex tooth portions130formed on at least one side of at least one of the at least two ridge portions126. A cut slot140is defined in the substrate110corresponding to the at least two ridge portions126of each heat dissipation strip120, and the cut slot140penetrates the first surface102and the second surface104.

Each of the ridge portions126includes at least one peak portion122and at least one trough portion124connected to the adjacent peak portion122. Each peak portion122is, for example, triangular-shaped or arc-shaped, or is of other suitable shape. The trough portion124is, for example, triangular-shaped or arc-shaped, or is a plane parallel to the first surface102. In the embodiment shown inFIG.1A, each peak portion122and each trough portion124is preferably triangular, which makes overall heat dissipation efficiency be about 80%. In the embodiment shown inFIG.1B, the trough portion124preferably has a planar shape, so that the overall heat dissipation efficiency is as high as 90%. In other different embodiments, each peak portion122and each trough portion124can be arc-shaped, triangular-shaped, or a combination thereof as required for use in different environments.

In addition, in the present embodiment as shown inFIGS.1A and1B, in each heat dissipation strip120, a ridge height128between the highest peak portion and the lowest trough portion of each of the at least two ridge portions126gradually increases in the longitudinal direction. In other words, an amplitude129also gradually increases in the longitudinal direction. This effectively increases a heat dissipation area, and thereby can also improve heat dissipation. However, in other different embodiments, the ridge height128of each of the at least two ridge portions126is designed to be equal in the longitudinal direction. That is, the amplitudes129are also equal in the longitudinal direction. Such configuration can also achieve good heat conduction and heat dissipation. It should be noted that the ridge height128is preferably less than 20 millimeters (mm), so that the ridge portions126have a low overall height, and are many in number, and are easy to produce, thus increasing a surface heat dissipation area in a same unit area. There is a height difference H between the lowest trough portion124of the ridge portion126and the first surface102, and the trough portion124is in a range of, for example, 1 mm to 10 mm. The height difference H can be designed to be a fixed value or gradually increase in the longitudinal direction, and configuration may vary as required.

A material of the substrate110and each heat dissipation strip126includes aluminum or aluminum alloy, and each concave-convex tooth portion130is triangular-shaped, rectangular-shaped, or arc-shaped, or a combination thereof. Each concave-convex tooth portion130is preferably triangular-shaped. Because it is not easy for heat to stay at a tip of the triangle, the heat can be removed more quickly, and thus the heat dissipation is improved. In other different embodiments, each concave-convex tooth portion130can also be arc-shaped or of other suitable shape, and the present application is not limited in this regard. In the embodiment ofFIG.1AandFIG.1B, copper150or copper alloy is disposed on the first surface102and each heat dissipation strip126by coating, electroplating, or other suitable methods. Thermal conductivity of the copper150is twice thermal conductivity of aluminum. In the present embodiment, thermal conductivity and heat dissipation can be improved by means of the copper150or the copper alloy. Specifically, the copper150or the copper alloy is preferably disposed on each ridge portion126having the concave-convex tooth portions130and is located on a surface opposite to the concave-convex tooth portions130. However, in other different embodiments, the copper150or the copper alloy can also be disposed on the first surface102and the second surface104at the same time, and configuration may vary as required.

In the embodiment shown inFIG.1AandFIG.1B, a main material of the whole structure of the present invention is preferably pure aluminum or aluminum alloy, and at least one layer of pure copper150or two layers of the copper alloy are arranged on the structure. In other different embodiments, various other metals or alloys thereof can even be disposed on the pure copper150or the copper alloy, or two-layer composite metal materials (such as copper and aluminum composite materials) can be disposed on the pure copper150or the copper alloy to form two layers or three layers on the heat dissipation strip120. A thickness of each layer varies according to actual application or use and according to heat dissipation conditions, and the present application is not limited in this regard. It should be noted that the afore-mentioned composite material can be an intermetallic layer consisting of two or more metals fused together. The three layers formed on the heat dissipation strip120are formed by various metals or alloys thereof superimposed on each other or fused together, and the present application is not limited in this regard. The above-mentioned other pure metals or alloys thereof include, but are not limited to, nickel, tin, zinc, silver, gold, iron, stainless steel, titanium, tungsten, beryllium, and bismuth.

A method of forming the heat dissipation strips120is described below. The concave-convex teeth portions130are formed on each ridge portion126of each heat dissipation strip120by, for example, stamping. The concave-convex tooth portions130inFIG.1Aare continuous or discontinuous on a surface of the ridge portion126. However, the concave-convex tooth portions130inFIG.1Bon the trough portion124of each ridge portion126have to be flattened by another stamping process to form a flat surface. In detail, after the concave-convex tooth portions130are formed, each heat dissipation strip120is stamped again, so that each heat dissipation strip120forms the at least two ridge portions126which extend out of any one surface of the metal heat dissipation plate100. For example, the at least two ridge portions126of each heat dissipation strip120extend out of the first surface102to form the cut slot140corresponding to the at least two ridge portions126. The at least two ridge portions126shown in the present embodiment preferably include three peak portions122and two trough portions124; however, the present application is not limited in this regard.

Through the low-height and high-density-arrangement ridge portions126and the concave-convex tooth portions130, the surface heat dissipation area of each heat dissipation strip120can be increased, so that in the same unit area, the surface heat dissipation area is increased, and heat dissipation is improved. Therefore, in the present embodiment, the concave-convex tooth portions130are used to spread the stamping stress originally concentrated on the two connection ends106of the metal heat dissipation plate100to the entire heat dissipation strip120, so the ridge portions126of the heat dissipation strip120are more easily extended and deformed. In addition, the stamping stress generated by stamping can also be released from the cut slot140having a longer length, so the stamping stress is not just concentrated on the two connection ends106of the metal heat dissipation plate100to cause deformation and warpage. Furthermore, the concave-convex tooth portions130can improve extensibility of the ridge portions126of each heat dissipation strip120, and reduces a risk that the heat dissipation strip120easily breaks during processing. Therefore, the metal heat dissipation plate100of the present embodiment does not generate any waste and has low production costs. The one-piece formed metal heat dissipation plate100with multiple ridge portions126and multiple concave-convex tooth portions130greatly increases the surface heat dissipation area to improve heat dissipation, and also facilitates mass production.

Please refer toFIGS.2to5together. The present invention also provides a heat dissipation device200, which includes at least a one-piece formed metal heat dissipation plate100and an electronic device300installed on one side of the metal heat dissipation plate100. The electronic device300referred to here can be applied to all industries related to heat conduction, heat convection, heat radiation, and the like. For example, the electronic device300can be used in central processing units (CPU), graphics processing units (GPU), network processing units (NPU), and other electronic products. Alternatively, the electronic device300can be used in heat exchangers or heat exchange systems for semiconductor heat sinks, solar cells, car batteries, and power plants to improve heat dissipation and energy efficiency. The heat dissipation device200includes a base210and a plurality of heat dissipation strips120arranged in a longitudinal direction. The base210includes a plurality of substrates110, and each substrate110includes a first surface102and a second surface104opposite to each other. Each heat dissipation strip120includes two connection ends106connected to the first surface102, at least two ridge portions126between the two connection ends106, and a plurality of concave-convex tooth portions130formed on at least one side of at least one of the at least two ridge portions126. A cut slot140is defined in the substrate110corresponding to the at least two ridge portions126of each heat dissipation strip120, and the cut slot140penetrates the first surface102and the second surface104.

In the embodiment shown inFIG.2andFIG.5, the base210further includes a connection plate212connecting the substrates110, and the electronic device300can be securely mounted on one side of the connection plate212by means of screw connection elements (e.g., screws, not illustrated) and the assembly holes214. The connection plate212and the outermost two of the substrates110together form a horseshoe shape (U-shaped). However, in other different embodiments, the base210can also be made into a rectangle, a disc shape, or other appropriate shape, depending on requirements or environments. When the electronic device300generates heat during operation, the connection plate212of the heat dissipation device200and the heat dissipation strips120connected to the heat dissipating plates100quickly transfer and remove heat, so as to achieve heat dissipation. Regarding a specific structure, a manufacturing method, and other detailed features of each metal heat dissipation plate100of the heat dissipation device200, please refer to the foregoing embodiments, and a detailed description is not repeated here.

Please refer toFIGS.6to8together, which are a perspective view and a side view of the one-piece formed metal heat dissipation plate100of the present invention. A main difference between the present embodiment and the above-mentioned embodiments is that the present embodiment has only one substrate100, one end of the substrate110is connected to a support plate160, the support plate160and the substrate110are perpendicular to each other, and then the support plate160is fixed to the base210of the heat dissipation device200. A thickness of the substrate110gradually becomes thinner in a direction away from the support plate160. Similarly, this allows heat to be removed more quickly because it is difficult for heat to stay at a tip. As a result, the present application achieves better heat dissipation. Regarding a specific structure, a manufacturing method, and other detailed features of the metal heat dissipation plate100, reference can be made to the foregoing embodiments, and a detailed description is omitted here for brevity.

The heat dissipation device200of the present embodiment is provided with multiple metal heat dissipation plates100. Each metal heat dissipation plate100is provided with a plurality of ridge portions126arranged at intervals. According to size or requirements, each metal heat dissipation plate100connected to the connection plate212can be provided with only one heat dissipation strip120. As shown in the embodiments ofFIGS.2and3A-3B, the ridge heights128of each heat dissipation strip120preferably gradually increase toward an opening (not labeled) of the base210, so the surface heat dissipation area per unit area also gradually increases, thereby improving the heat dissipation and heat dissipation efficiency. Through experiments, it is found that, under the same conditions, data is 9503 pts while the heat dissipation device200is used to test a CPU (for example: Ryzen 5 3600XT), which increases the heat dissipation by 20% compared to conventional techniques. Therefore, by means of the greatly increased surface heat dissipation area, and the heat dissipation device200surely can improve the heat dissipation.

In a fourth embodiment, with reference toFIGS.9and10, the one-piece formed metal heat dissipation plate100further includes two frame strips111disposed at two lateral edges of the substrate110opposing each other, and a plurality of heat dissipation fins131. In some embodiments, the heat dissipation fins131are integrally formed on the two frame strips111and/or each of the ridge portions126by a stamping process. Specifically, the heat dissipation fins131protrude outward from upper surfaces of the frame stripes111and/or the ridge portions126and are spaced apart from each other. As shown inFIG.9, the heat dissipation fins131extend in a direction opposite to a direction where the concave-convex tooth portions130extend. The heat dissipation fins131as well as the concave-convex tooth portions130are configured to increase area for heat dissipation, thus enhancing the performance of heat dissipation.

In some embodiments, as shown inFIG.10, a plurality of dividing strips141are formed in conjunction with the cut slots140and adjoin the cut slots140, respectively. The heat dissipation fins131can be formed on upper surfaces of the dividing strips141to further enhance the performance of heat dissipation.

In a fifth embodiment, with reference toFIGS.11and12, the substrate110is provided with a plurality of assembly portions112arranged on top and bottom ends of a lateral edge of the substrate110, and the dissipation device200further includes at least a heat pipe220. The heat pipe220may be preferably U-like in shape, and opposite two ends of the heat pipe220are assembled to the assembly portions112. In some embodiments, the assembly portions112may be screw holes, so that the heat pipe220is configured to be firmly screwed to the assembly portions112. Alternatively, the assembly portions112may be applied with an adhesive having heat transfer properties, so that the heat pipe220is configured to be fixed to the assembly portions112through the adhesive. With the provision of the heat pipe220, heat from the electronic device300can be quickly transferred and dissipated because the heat is transferred from the top and bottom ends of the lateral edge of the substrate110earlier than other areas of the substrate110, thus further enhancing the performance of heat dissipation. It should be noted that the heat dissipation fins131and the heat pipe220can also be used in any of the above-mentioned embodiments.

In a sixth embodiment, with reference toFIG.13, the assembly portions112are arranged on a front side of the substrate110. The heat pipe220is located above the trough portions124and extends across the ridge portions126in rows from a top to a bottom of the substrate110. That is, in a side view of the dissipation device200, the heat pipe220has a profile including multiple S-like shapes connected to each other. In this way, the length of the heat pipe220is significantly increased, thus enhance the performance of heat dissipation. It should be noted that the heat pipe220may also be assembled to other positions of the substrate110, including but not limited to the front side, the lateral edge, and a rear side of substrate110.

In some embodiments, the metal heat dissipation plate100may be miniaturized to be compatible with electronic products small in size, such as semiconductor components, but not limited thereto. For example, the metal heat dissipation plate100may be assembled to a packaged chip (not shown) to facilitate heat dissipation of the packaged chip.

Through the low-height/high-density-arrangement ridge portions126and the concave-convex tooth portions130, the surface heat dissipation area of the heat dissipation strip120can be increased, so the surface heat dissipation area and the heat dissipation in the same unit area can be effectively increased. Therefore, in this embodiment, the concave-convex tooth portions130are used to spread the stamping stress originally concentrated on the two connection ends106of the metal heat dissipation plate100to the entire heat dissipation strip120, so the ridge portions126of the heat dissipation strip120are more easily extended and deformed. In addition, the stamping stress generated by stamping can also be released by the cut slot140having a longer length, so the stamping stress is not just concentrated on the two connection ends106of the metal heat dissipation plate100to cause deformation and warpage. Furthermore, the concave-convex tooth portions130can improve extensibility of the ridge portions126of each heat dissipation strip120, and reduces a risk that the heat dissipation strip120easily breaks during processing. Therefore, the metal heat dissipation plate100of the present embodiment does not generate any waste and has low production costs. The one-piece formed metal heat dissipation plate100with multiple ridge portions126and multiple concave-convex tooth portions130greatly increases the surface heat dissipation area to improve heat dissipation, and also facilitates mass production.

The above descriptions are only preferable embodiments of the present invention, and are not intended to limit the protection scope of the present invention. All equivalent changes based on the spirit of the present invention should be deemed to fall within the protection scope of the present invention.