KR102704167B1 - Manifold mini-channel heat sink - Google Patents

Abstract

A heat sink according to an embodiment of the present invention comprises: a first plate having an open lower surface and including a first channel and a second channel having a width in a first direction and a length in a second direction; a jet plate disposed at a lower portion of the first plate and including a first communication hole communicating with the first channel and a second communication hole communicating with the second channel;
It may include a second plate disposed below the jet plate and including a distribution channel connecting the first communication hole and the second communication hole; an inlet portion including an inlet hole communicating with the first channel; and an outlet portion including an outlet hole communicating with the second channel.

Description

Manifold Euro Heatsink {Manifold mini-channel heat sink}

The present invention relates to a manifold euro heat sink, and more particularly, to a heat sink that improves cooling performance by ensuring a uniform flow rate of fluid in a manifold euro using a jet plate that generates jet flow.

This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A5A1018153)

In general, when electrical and electronic devices and parts generate heat, a heat sink is installed to prevent the device from malfunctioning due to heat. The heat sink uses a metal with high thermal conductivity to allow the heat inside the device or part to be quickly released. Technologies related to heat sinks include the fin and fan method, the thermoelectric element (Peltier) method, the cooling water circulation method, and the heat pipe method.

As demand for electric vehicles has increased recently, technologies for battery thermal management are being actively researched.

In particular, as battery capacity increases and weight reductions are required, a method of inserting a thin film plate made of a highly conductive metal such as aluminum between square or plate-shaped batteries and cooling a bundle of thin film plates is widely used.

However, this has the problem that the heat flux applied to the cooling plate increases, so a cooling device with low thermal resistance and high temperature uniformity is required.

The present invention provides a heat sink capable of efficiently cooling a heat source by thinning the thermal boundary layer of a fluid as the jet flow collides with the heat source wall during movement of the fluid.

In addition, the present invention provides a heat sink capable of improving heat transfer performance by increasing the cross-sectional area through microchannels to increase the heat exchange area.

In addition, the present invention provides a heat sink capable of efficiently cooling a heat source by additionally arranging auxiliary micro channels so that both sides can come into contact with a heat source.

In addition, the present invention provides a heat sink capable of efficiently cooling a heat source by enabling local cooling through deformation of the shape of a jet plate.

Meanwhile, the technical tasks to be achieved in the present invention are not limited to the technical tasks mentioned above, and other technical tasks not mentioned can be clearly understood by a person having ordinary knowledge in the process field to which the present invention belongs from the description below.

A heat sink according to an embodiment of the present invention comprises: a first plate having an open lower surface and including a first channel and a second channel having a width in a first direction and a length in a second direction; a jet plate disposed on a lower portion of the first plate and including a first communication hole communicating with the first channel and a second communication hole communicating with the second channel;

It may include a second plate disposed below the jet plate and including a distribution channel connecting the first communication hole and the second communication hole; an inlet portion including an inlet hole communicating with the first channel; and an outlet portion including an outlet hole communicating with the second channel.

A heat sink according to an embodiment of the present invention may have the first channel and the second channel alternately arranged in the first direction.

The above distribution channel can have a length in a first direction perpendicular to the first channel and the second channel.

Each of the plurality of first communication holes and the plurality of second communication holes is arranged in the second direction, the first communication holes and the second communication holes are alternately arranged in the first direction, and the size of the cross-sectional area of the first communication hole may be smaller than that of the second communication hole.

The first communication hole and the second communication hole may not be arranged in the preset area of the jet plate.

The first plate further includes a third channel and a fourth channel having an open upper surface, and the heat sink according to an embodiment of the present invention is disposed on the first plate, and further includes an auxiliary jet plate including a third communication hole communicating with the third channel and a fourth communication hole communicating with the fourth channel; and a third plate disposed on the auxiliary jet plate and including an auxiliary distribution channel connecting the third communication hole and the fourth communication hole, and the third channel may be adjacent to the first channel or the second channel in the first direction, and the fourth channel may be adjacent to the first channel or the second channel in the first direction.

The third channel and the fourth channel can be arranged alternately in the first direction.

The above auxiliary distribution channel can have a length in the first direction.

A plurality of the third communication holes and a plurality of the fourth communication holes are arranged in the second direction, the third communication holes and the fourth communication holes are alternately arranged in the first direction, and the size of the cross-sectional area of the third communication hole may be smaller than that of the fourth communication hole.

The third communication hole and the fourth communication hole may not be arranged in the preset area of the auxiliary jet plate.

The second plate may include a fitting groove having an open lower surface, and the heat sink according to an embodiment of the present invention may further include a heat sink that is fitted into the fitting groove.

A heat sink according to an embodiment of the present invention may further include a thermal pad interposed between the second plate and the heat dissipation plate.

The present invention can provide a heat sink capable of efficiently cooling a heat source by thinning the thermal boundary layer of a fluid as the jet flow collides with the heat source wall when the fluid moves.

In addition, the present invention can provide a heat sink that can improve heat transfer performance by increasing the cross-sectional area through microchannels to increase the heat exchange area.

In addition, the present invention can provide a heat sink capable of efficiently cooling a heat source by additionally arranging auxiliary micro channels so that both sides can come into contact with a heat source.

In addition, the present invention can provide a heat sink capable of efficiently cooling a heat source by enabling local cooling through deformation of the shape of a jet plate.

Meanwhile, the effects obtainable from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

FIG. 1 is a perspective view of a heat sink according to a first embodiment of the present invention.
FIG. 2 is an exploded view of a heat sink according to a first embodiment of the present invention.
Figure 3 is an enlarged view of part ‘A’ of Figure 2.
FIG. 4 is a perspective view of a jet plate according to the first embodiment of the present invention.
Figure 5 is an enlarged view of section 'B' of Figure 2.
Figure 6 is a CFD analysis result of a cooling fluid according to the first embodiment of the present invention.
Figure 7 is a perspective view of a jet plate according to a second embodiment of the present invention.
Figure 8 is an exploded view of a heat sink according to a third embodiment of the present invention.
Figure 9 is an enlarged view of section 'C' of Figure 8.
FIG. 10 is a perspective view of an auxiliary jet plate according to a third embodiment of the present invention.
Figure 11 is an enlarged view of section 'C''of Figure 8.
FIG. 12 is an exemplary diagram of a heat sink according to the fourth embodiment of the present invention.
Figure 13 is an enlarged view of section 'D' of Figure 12.

The advantages and/or features of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a heat sink according to a first embodiment of the present invention. FIG. 2 is an exploded view of a heat sink according to a first embodiment of the present invention. FIG. 3 is an enlarged view of portion 'A' of FIG. 2. FIG. 4 is a perspective view of a jet plate according to the first embodiment of the present invention. FIG. 5 is an enlarged view of portion 'B' of FIG. 2. FIG. 6 is a CFD analysis result of a cooling fluid according to the first embodiment of the present invention.

Referring to FIGS. 1 to 6, the first embodiment of the heat sink of the present invention includes an inlet portion (100), a first plate (200), a jet plate (300), a second plate (400), and an outlet portion (500).

The inlet (100) may have a rectangular solid shape, but is not limited thereto.

The inlet (100) may include an inlet port (101).

The inlet (101) refers to a hole that is connected to the outside and through which fluid flows in.

The side (110) of the inlet portion (100) may include an inlet hole (111) that is open toward the first plate (200).

There may be multiple inlet holes (111) and the fluid can be distributed to the first plate (200).

The first plate (200) may include a first channel (210), a second channel (220), and a first separating wall (230).

The first plate (200) may be composed of a folded pin. The folded pin has the advantage of low production cost, so that a cost-saving effect can be achieved.

The first channel (210) and the second channel (220) may have an open bottom and may have a width in the first direction (X-axis direction) and a length in the second direction (Y-axis direction).

In addition, the first channel (210) and the second channel (220) may be arranged alternately in the first direction (X-axis direction). Meanwhile, in FIG. 3, the first channel (210) and the second channel (220) are illustrated as being arranged alternately one by one, but this is for convenience of explanation and the present invention is not limited thereto.

The first channel (210) can be positioned at a position corresponding to the inlet hole (111) in the first direction (X-axis direction). Accordingly, the fluid introduced from the inlet hole (111) can flow into the first channel (210).

The first separation wall (230) is arranged between the first channel (210) and the second channel (220) in the first direction (X-axis direction) and is arranged at a position corresponding to the bottom of the first channel (210) and the second channel (220) in the third direction (Z-axis direction). The effect thereof will be described later together with the jet plate (300) below.

The jet plate (300) can be placed under the first plate (200). Accordingly, the upper surface of the jet plate (300) can come into contact with the lower surface of the first plate (200).

Specifically, the upper surface of the jet plate (300) can be in contact with the first separation wall (230). As a result, the fluid flowing into the first channel (210) and the second channel (220) can move along the second direction (Y-axis direction), which is the longitudinal direction of the channel (210, 220), without leaving each channel (210, 220).

Additionally, the jet plate (300) may include a first communication hole (310) and a second communication hole (320).

Here, the first communication hole (310) can be communicated with the first channel (210), and the second communication hole (320) can be communicated with the second channel (220).

A plurality of first communication holes (310) can be arranged along the second direction (Y-axis direction), a plurality of second communication holes (320) can be arranged along the second direction (Y-axis direction), and the first communication holes (310) and the second communication holes (320) can be arranged alternately in the first direction (X-axis direction) to correspond to the first channel (210) and the second channel (220), respectively.

For example, a plurality of first communication holes (310) and a plurality of second communication holes (320) may be arranged in one row in the second direction (Y-axis direction), and the first communication holes (310) and the second communication holes (320) of each row may be arranged alternately.

Accordingly, the fluid introduced into the first plate (200) can be distributed with a uniform flow, thereby increasing the cooling efficiency of the heat sink.

This is intended to explain a jet plate (300) including a plurality of first communication holes (310) and a plurality of second communication holes (320) according to a preferred embodiment of the present invention, but is not limited thereto and may be formed in any form as long as the characteristics of the present invention can be utilized.

In addition, the size of the cross-sectional area of the first communication hole (310) may be smaller than that of the second communication hole (320). Accordingly, a jet flow may be formed when the fluid passes through the first communication hole (310), and head loss may be minimized when passing through the second communication hole (320).

Meanwhile, the jet plate (300) may include a remaining area (301) and a preset area (302) that are distinguished in the second direction (Y-axis direction).

The first communication hole (310) and the second communication hole (320) may not be placed in the preset area (302).

Here, the preset area (302) may be at least one area having a length in the first direction (X-axis direction) and a width in the second direction (Y-axis direction).

Additionally, an area other than a preset area (302) can be defined as a remaining area (301).

The preset area (302) can be set depending on whether it is a necessary area for cooling the heat source. For example, the preset area (302) can be placed at a position of the jet plate (300) corresponding to the position where the heat source is placed so that no fluid flows, and a greater amount of fluid flows to the remaining area (301), thereby performing efficient cooling.

The second plate (400) can be placed below the jet plate (300).

The second plate (400) may include a distribution channel (410) and a second separating wall (420).

The distribution channel (410) has an open upper surface and can connect the first communication hole (310) and the second communication hole (320).

Specifically, the fluid flowing into the first channel (210) of the first plate (200) can flow into the distribution channel (410) through the first communication hole (310) of the jet plate (300), and the fluid flowing into the distribution channel (410) can flow into the second channel (220) through the second communication hole (320).

The distribution channel (410) may have a length in a first direction (X-axis direction) perpendicular to the first channel (210) and the second channel (220). Accordingly, the fluid introduced into the distribution channel (410) may be distributed throughout the entire heat sink.

The second separation wall (420) can be placed between each distribution channel (410) in the second direction (Y-axis direction) and can be placed at a position corresponding to the top of each distribution channel (410) in the third direction (Z-axis direction).

By this, the second plate (400) can come into contact with the lower surface of the jet plate (300). Specifically, the second separating wall (420), which is the upper surface of the second plate (400), can come into contact with the lower surface of the jet plate (300).

Accordingly, the second separation wall (420) can prevent the fluid introduced into the distribution channel (410) from escaping and can move along the first direction (X-axis direction), which is the longitudinal direction of the distribution channel (410).

In addition, the second plate (400) may be composed of a folded pin. The folded pin has the advantage of low production cost, so that a cost-saving effect can be achieved.

The outlet (500) may have a rectangular solid shape, but is not limited thereto.

The outlet (500) may include an outlet (not shown).

An outlet (not shown) is a hole that is connected to the outside and through which fluid flows out.

The side (510) of the inlet (500) may include an outlet hole (511) open toward the first plate (200).

The outlet hole (511) may be connected to the second channel (220). Specifically, the outlet hole (511) may be positioned corresponding to the second channel (220) in the first direction (X-axis direction).

By this, the fluid flowing into the second channel (220) can move to the outlet (500) through the outlet hole (511).

There may be multiple leak holes (511).

Figure 7 is a perspective view of a jet plate according to a second embodiment of the present invention.

Referring to FIG. 7, the heat sink according to the second embodiment of the present invention has a different configuration of the jet plate (300') compared to the heat sink according to the first embodiment of the present invention illustrated in FIGS. 1 to 6, and therefore, only the configuration of the different jet plate (300') will be described in detail below, and detailed descriptions of overlapping drawing symbols for the same configuration will be omitted.

The jet plate (300') may include a first communication hole (310') and a second communication hole (320').

The first communication hole (310') and the second communication hole (320') can be arranged alternately in the first direction (X-axis direction).

The size of the cross-sectional area of the first communication hole (310') may be smaller than that of the second communication hole (320'). Accordingly, a jet flow may be formed when the fluid passes through the first communication hole (310'), and head loss may be minimized when passing through the second communication hole (320').

Fig. 8 is an exploded view of a heat sink according to a third embodiment of the present invention. Fig. 9 is an enlarged view of a portion 'C' of Fig. 8. Fig. 10 is a perspective view of an auxiliary jet plate according to a third embodiment of the present invention. Fig. 11 is an enlarged view of a portion 'C' 'of Fig. 8.

Referring to FIGS. 8 to 11, the heat sink according to the third embodiment of the present invention has different configurations of the first plate (200), the auxiliary jet plate (600), and the third plate (700) compared to the heat sink according to the first embodiment of the present invention illustrated in FIGS. 1 to 6, and therefore, only the configurations of the first plate (200), the auxiliary jet plate (600), and the third plate (700) that are different will be described in detail below, and detailed descriptions of overlapping drawing symbols for the same configuration will be omitted.

The first plate (200) may further include a third channel (240), a fourth channel (250), and an auxiliary separating wall (260).

The third channel (240) and the fourth channel (250) may have an open top shape.

The third channel (240) may be adjacent to the first channel (210) or the second channel (220) in the first direction (X-axis direction).

The fourth channel (250) may be adjacent to the first channel (210) or the second channel (220) in the first direction (X-axis direction).

Accordingly, the lower surface of the third channel (240) or the fourth channel (250) may be formed as the first separating wall (230).

The third channel (240) and the fourth channel (250) may be arranged alternately in the first direction (X-axis direction), but are not necessarily limited thereto and may be arranged in any form as long as the characteristics of the present invention can be utilized.

The auxiliary separation wall (260) can be placed between the third channel (240) and the fourth channel (250) in the first direction (X-axis direction).

Accordingly, the auxiliary separation wall (260) can be the upper surface of the first channel (210) and the second channel (220).

The auxiliary jet plate (600) can be placed on the upper side of the first plate (200). Accordingly, the lower surface of the auxiliary jet plate (600) can come into contact with the auxiliary separating wall (260), which is the upper surface of the first plate (200).

Accordingly, the auxiliary separation wall (260) can allow the fluid flowing into the third channel (240) and the second channel (250) to move along the first direction (X-axis direction), which is the longitudinal direction of each channel (240, 250), without being separated.

The auxiliary jet plate (600) may include a third communication hole (610) and a fourth communication hole (620).

The third communication hole (610) can be connected to the third channel (240), and the fourth communication hole (620) can be connected to the fourth channel (250).

The third plate (700) can be placed on top of the auxiliary jet plate (600).

The third plate (700) can connect the third communication hole (610) and the fourth communication hole (620).

Here, the third communication hole (610) can be communicated with the third channel (240), and the fourth communication hole (620) can be communicated with the fourth channel (250).

A plurality of third communication holes (610) can be arranged in the second direction (Y-axis direction), and a plurality of fourth communication holes (620) can be arranged in the second direction (Y-axis direction).

The third communication hole (610) and the fourth communication hole (620) can be alternately arranged in the first direction (X-axis direction).

For example, a plurality of third communication holes (610) and a plurality of fourth communication holes (620) may be arranged in one row in the second direction (Y-axis direction), and the third communication holes (610) and fourth communication holes (620) in each row may be arranged alternately.

Accordingly, the fluid flowing into the third channel (240) and the fourth channel (250) can be distributed with a uniform flow, thereby increasing the cooling efficiency of the heat sink.

This is intended to explain a jet plate including a plurality of third communication holes (610) and a plurality of fourth communication holes (620) according to a preferred embodiment of the present invention, but is not limited thereto and may be formed in any form as long as the characteristics of the present invention can be utilized.

In addition, the size of the cross-sectional area of the third communication hole (610) may be smaller than that of the fourth communication hole (620). Accordingly, a jet flow may be formed when the fluid passes through the third communication hole (610), and head loss may be minimized when passing through the fourth communication hole (620).

The third communication hole (610) and the fourth communication hole (620) may not be arranged in the preset area (602) of the auxiliary jet plate (600), but are not necessarily limited thereto.

Here, the preset area (602) may be at least one area having a length in the first direction (X-axis direction) and a width in the second direction (Y-axis direction).

Additionally, an area other than a preset area (602) can be defined as a remaining area (601).

The preset area (602) can be set depending on whether it is a necessary area for heat source cooling. For example, the preset area (602) can be placed at a position of the auxiliary jet plate (600) corresponding to the position where the heat source is placed so that no fluid flows, and more fluid can pass through the remaining area (601) to perform efficient cooling.

The third plate (700) may further include an auxiliary distribution channel (710).

Specifically, the auxiliary distribution channel (710) can receive fluid from the first plate (200) through the third communication hole (610) and can deliver fluid to the third plate (700) through the fourth communication hole (620).

The auxiliary distribution channel (710) may have a length in a first direction (X-axis direction) perpendicular to the first channel (210) and the second channel (220). Accordingly, the fluid introduced into the auxiliary distribution channel (710) may be distributed throughout the heat sink.

In addition, the third plate (700) may be composed of a folded pin. The folded pin has the advantage of low production cost, so that a cost-saving effect can be achieved.

Fig. 12 is an exemplary diagram of a heat sink according to the fourth embodiment of the present invention. Fig. 13 is an enlarged view of section 'D' of Fig. 12.

The heat sink according to the fourth embodiment of the present invention has a different configuration of the second plate (400), the heat sink (800), and the thermal pad (900) compared to the heat sink according to the first embodiment of the present invention illustrated in FIGS. 1 to 6. Therefore, only the configurations of the second plate (400), the heat sink (800), and the thermal pad (900) that are different will be described in detail below, and detailed descriptions of overlapping drawing symbols for the same configuration will be omitted.

Referring to FIGS. 12 and 13, the second plate (400) may include an open fitting groove (430) on its lower surface.

The insertion groove (430) can be arranged between the distribution channels (410) in the second direction (Y-axis direction) and can be an open groove on the lower surface.

The heat sink (800) can be fitted into the fitting groove (430). For example, the heat sink (800) can be made of a material with high thermal conductivity, such as an aluminum plate. As a result, the heat sink (800) can be easily fixed, and the contact resistance for fixing the heat sink (800) can be reduced.

A heat source can be placed between the heat sinks (800) to exchange heat through the heat sink. Specifically, a plurality of heat sources (3) having a length in the third direction (Z-axis direction) can be placed between the heat sinks (800), so that a plurality of heat sources (3) can be cooled simultaneously.

The heat source (3) refers to the source of heat generation. In the present invention, it is preferably a battery, but is not necessarily limited thereto.

A thermal pad (900) can be interposed between the second plate (400) and the heat sink (800).

Thermal pad (900) means a heat-relieving pad having chemical effects such as heat resistance and insulation, and physical characteristics such as flexibility and elastic adhesion.

Although specific embodiments of the present invention have been described so far, it is obvious that various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described below but also by equivalents thereof. Although the present invention has been described by limited embodiments and drawings as described above, the present invention is not limited to the above embodiments, and various modifications and variations are possible from this description by those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should be understood only by the claims described below, and all equivalent or equivalent modifications thereof should fall within the scope of the spirit of the present invention.

100: Inlet
101: Inlet
110: Side of the inlet
111: Inlet hole
200: 1st plate
201: Channel 1
220: Channel 2
230: 1st Separation Wall
240: Third Channel
250: Channel 4
300: Jet Plate
310: 1st chimney
320: Second connecting hall
400: 2nd plate
410: Distribution Channel
420: Second Separation Wall
500: Outlet
600: Auxiliary jet plate
700: 3rd plate
800: Heatsink
900: Thermal Pad

Claims (13)

A first plate having a folded pin shape, comprising a plurality of first channels and a plurality of second channels alternately arranged in a first direction, and a first separating wall provided between the first channels and the second channels;
A jet plate, which is arranged at the lower portion of the first plate and includes a first communication hole communicating with the first channel and a second communication hole communicating with the second channel, so that the fluid introduced into the first plate is distributed with a uniform flow;
A second plate having a folded fin shape, which is arranged at the lower portion of the jet plate and includes a plurality of distribution channels connecting the first communication hole and the second communication hole, and a second separating wall arranged between adjacent distribution channels among the plurality of distribution channels;
An inlet section including an inlet hole communicating with the first channel; and
Including an outlet section including an outlet hole communicating with the second channel,
The first channel and the second channel have a width in the first direction and a length in the second direction perpendicular to the first direction, and have a convex iron-shaped cross-section with an open lower surface.
The above distribution channel is a heat sink having a concave cross-section with a length in the first direction and an open upper surface.
delete delete In the first paragraph,
Each of the plurality of first communication holes and the plurality of second communication holes is arranged in the second direction,
The above first communication hole and the above second communication hole are alternately arranged in the first direction,
A heat sink in which the cross-sectional area of the first communication hole is smaller than that of the second communication hole.
In the fourth paragraph,
A heat sink in which the first communication hole and the second communication hole are not arranged in the preset area of the jet plate.
In the first paragraph,
The above first plate further includes a third channel and a fourth channel having an open upper surface,
An auxiliary jet plate disposed on the upper portion of the first plate and including a third communication hole communicating with the third channel and a fourth communication hole communicating with the fourth channel; and
A heat sink further comprising a third plate disposed on top of the auxiliary jet plate and including an auxiliary distribution channel connecting the third communication hole and the fourth communication hole.
In Article 6,
A heat sink in which the third channel and the fourth channel are alternately arranged in the first direction.
In Article 6,
The above auxiliary distribution channel is a heat sink having a length in the first direction.
In Article 6,
A plurality of the third communication holes and a plurality of the fourth communication holes are arranged in the second direction,
The third communication hole and the fourth communication hole are arranged alternately in the first direction,
A heat sink in which the cross-sectional area of the third communication hole is smaller than that of the fourth communication hole.
In Article 9,
The above auxiliary jet plate comprises a cooling area in which the third communication hole and the fourth communication hole are arranged; and
Including a non-cooling area where the third communication hole and the fourth communication hole are not arranged,
The third channel is adjacent to the first channel or the second channel in the first direction,
The fourth channel is a heat sink adjacent to the first channel or the second channel in the first direction.
In the first paragraph,
The second plate includes an open fitting groove on the lower surface,
A heat sink further comprising a heat sink that is fit-fitted into the above-described fitting groove.
In Article 11,
A heat sink further comprising a thermal pad interposed between the second plate and the heat sink.
delete

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