A hybrid microchannel radiator combining trapezoidal and corrugated shapes

Abstract

The present invention discloses a hybrid microchannel radiator combining trapezoidal and corrugated shapes, comprising a metal copper shell, wherein jet outlets are arranged on both sides of the metal copper shell, a jet inlet is arranged on the upper part of the metal copper shell, the lower part of the metal copper shell is an electronic component bonding surface, an internal channel penetrating both sides and the upper part of the metal copper shell is arranged inside the metal copper shell, the internal channel consists of a jet inlet channel and a jet outlet channel, the jet inlet channel is located in the middle of the internal channel, and the jet outlet channel is located on both sides of the internal channel. The present invention changes the structural shape of the microchannel, adopts a hybrid microchannel combining trapezoidal and corrugated shapes, combines the advantages of microchannel flow and jet impact, provides a very high heat dissipation capacity, and greatly enhances convective heat exchange, so that a high degree of temperature uniformity is maintained on the cooling surface.

Description

Technical Field

[0001] The invention belongs to the field of heat dissipation of microchannel radiators, and in particular relates to a hybrid microchannel radiator combining trapezoidal and corrugated shapes. Background Art

[0002] In the past few decades, high heat generation fields such as packaged electronic devices, solar photovoltaic concentrators, and laser diode arrays have made rapid progress. With the higher integration of electronic devices and higher power density, heat dissipation has exceeded 500W / cm 2 , but the heat density is still increasing, and a more efficient thermal management system is urgently needed. Microchannel flow and jet impingement are two traditional heat dissipation strategies. Microchannel radiators only need less coolant to dissipate very large heat in a small area, and have a compact structure. Compared with microchannel radiators, jet impingement cooling can dissipate very large heat flux and small pressure drop. However, they still have shortcomings. Microchannels have problems such as large pressure drop and poor temperature uniformity. For jet impingement, it only has a high heat transfer capacity in the jet area, but there is a large temperature gradient on the heated surface. Microchannel radiators and jet impingement cooling with simple structures can no longer meet the heat dissipation requirements. If cooling is simply performed by increasing the flow rate, the pressure loss will increase sharply, resulting in a sharp increase in pump power. Therefore, a new type of microchannel heat exchanger is urgently needed to achieve the heat dissipation requirements by changing the shape of the model.

[0003] One of the most effective cooling modules is the combination of microchannel and jet impingement, which is called a hybrid microchannel heat sink. It has the advantages of both microchannel flow and jet impingement, not only providing very high heat dissipation capacity but also maintaining a high degree of temperature uniformity on the cooling surface. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, meet the actual needs, and provide a hybrid microchannel radiator combining trapezoidal and corrugated shapes, which improves the heat dissipation capacity while making the temperature uniform on the cooling surface.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0006] The present invention discloses a hybrid microchannel radiator combining trapezoidal and corrugated shapes, comprising a metal copper shell, wherein jet outlets are arranged on both sides of the metal copper shell, a jet inlet is arranged on the upper part of the metal copper shell, the lower part of the metal copper shell is an electronic component bonding surface, an internal channel penetrating both sides and the upper part of the metal copper shell is arranged inside the metal copper shell, the internal channel consists of a jet inlet channel and a jet outlet channel, the jet inlet channel is located in the middle of the internal channel, and the jet outlet channels are located on both sides of the internal channel.

[0007] The jet inlet channel comprises a rectangular channel and a trapezoidal channel, the upper portion of the jet inlet channel is a rectangular channel, the lower portion of the jet inlet channel is a trapezoidal channel, the rectangular channel is a flat rectangular parallelepiped structure, and the trapezoidal channel is an inverted trapezoidal structure.

[0008] The jet outlet channel comprises a corrugated channel and a trapezoidal channel. The corrugated channel is connected to the inlet channel. A trapezoidal channel is arranged at the jet outlet of the jet outlet channel. The corrugated channel is a quadrangular prism structure, and the four sides thereof are evenly distributed corrugated surfaces.

[0009] A plurality of evenly distributed internal channels are arranged inside the metal copper shell, and the internal channels are in an inverted "T"-shaped structure.

[0010] The beneficial effects of the present invention are:

[0011] The present invention changes the structural shape of the microchannel and adopts a hybrid microchannel that combines trapezoidal and wavy shapes, combining the advantages of microchannel flow and jet impact, providing a very high heat dissipation capacity while greatly enhancing convective heat transfer, so that a high degree of temperature uniformity is maintained on the cooling surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 It is a cross-sectional view of the internal structure of the present invention;

[0014] Figure 3 It is a schematic diagram of the internal channel of the present invention.

[0015] In the figure: 1 metal copper shell, 2 internal channel, 201 rectangular channel, 202 corrugated channel, 203 trapezoidal channel, 3 jet inlet channel, 301 jet inlet, 4 jet outlet channel, 401 jet outlet, 5 electronic component bonding surface. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0017] See also Figure 1-3 .

[0018] The invention discloses a hybrid microchannel radiator combining trapezoid and waveform, comprising a metal copper shell 1, wherein jet outlets 401 are arranged on both sides of the metal copper shell 1, a jet inlet 301 is arranged on the upper part of the metal copper shell 1, and an electronic component bonding surface 5 is provided on the lower part of the metal copper shell 1. An internal channel 2 penetrating both sides and the upper part of the metal copper shell 1 is arranged inside the metal copper shell 1, wherein the internal channel 2 is composed of a jet inlet channel 3 and a jet outlet channel 4, wherein the jet inlet channel 3 is located in the middle of the internal channel 2, and the jet outlet channel 4 is located on both sides of the internal channel 2; the fluid injected through the jet outlet will hit the bottom wall and form a vortex, and since the coolant directly hits the heat exchange surface, the flow process is short and the flow boundary layer on the impacted surface is thin, and the heat exchange effect is good, and since the channel outlets are on both sides, the channel is forced to be divided into two branches, thereby enhancing the turbulence; and since the coolant inlet is located in the middle of the internal channel, the temperature difference on both sides will be reduced, thereby making the temperature distribution of the heated surface more uniform.

[0019] The jet inlet channel 3 includes a rectangular channel 201 and a trapezoidal channel 203. The upper portion of the jet inlet channel 3 is the rectangular channel 201, and the lower portion of the jet inlet channel 3 is the trapezoidal channel 203. The rectangular channel 201 is a flat rectangular parallelepiped structure, and the trapezoidal channel 203 is an inverted trapezoidal structure. When the area of ​​the cross section is constant, the trapezoidal cross section has a larger circumference than the rectangular cross section, so the contact area between the fluid and the solid is increased. Moreover, due to the obstacle effect of the side wall, the impact jet will be easier to form a vortex than the rectangular cross section, which is conducive to the development of the vortex.

[0020] The jet outlet channel 4 includes a corrugated channel 202 and a trapezoidal channel 203. The corrugated channel 202 is connected to the inlet channel 3. The jet outlet 401 of the jet outlet channel 4 is provided with a trapezoidal channel 203. The corrugated channel 202 is a quadrangular prism structure, and the four sides thereof are uniformly distributed corrugated surfaces. Based on the principle of enhanced heat transfer and the theory of flow resistance, the heat exchange rate of the impact surface of the corrugated channel is higher than that of the flat channel. The wall surface in the middle of the microchannel adopts a sinusoidal corrugated wall, and the control equation of the corrugated wall is Y=A·sin(2π·x / λ), where A is the amplitude and λ is Wavelength, different amplitudes and wavelength values ​​can be selected according to actual heat dissipation requirements; the use of corrugated walls can effectively enhance the disturbance of the fluid, destroy the fluid boundary layer, and reduce thermal resistance; at the same time, the corrugated surface conforms to the flow characteristics, and compared with the common needle-column matrix channel, the flow resistance is greatly reduced; the reason for the enhanced heat transfer of the corrugated microchannel is that eddies are formed on the cross-section of the channel at the curved wall, which promotes the mixing of the coolant and enhances the convective heat transfer between the coolant and the channel wall; there is a small straight channel at the outlet of the internal channel, the purpose of which is to suppress the backflow at the outlet, so that the coolant can flow out of the microchannel more conveniently.

[0021] The metal copper shell 1 is provided with a plurality of evenly distributed internal channels 2, and the internal channels 2 are in an inverted "T"-shaped structure.

[0022] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A hybrid microchannel heat sink combining trapezoidal and corrugated shapes, comprising a metal copper shell (1), characterized in that: The metal copper shell (1) is provided with jet outlets (401) on both sides, the metal copper shell (1) is provided with a jet inlet (301) on the top, the metal copper shell (1) is provided with an electronic component bonding surface (5) on the bottom, the metal copper shell (1) is provided with an internal channel (2) penetrating both sides and the top of the metal copper shell (1), the internal channel (2) is composed of a jet inlet channel (3) and a jet outlet channel (4), the jet inlet channel (3) is located in the middle of the internal channel (2), and the jet outlet channel (4) is located on both sides of the internal channel (2); The jet outlet channel (4) comprises a corrugated channel (202) and a trapezoidal channel (203); the corrugated channel (202) is connected to the jet inlet channel (3); a trapezoidal channel (203) is provided at the jet outlet (401) of the jet outlet channel (4); the corrugated channel (202) is a quadrangular prism structure, and the four upper surfaces thereof are uniformly distributed corrugated surfaces; the wall surface in the middle of the microchannel adopts a sinusoidal corrugated wall, and the control equation of the corrugated wall is Y=A·sin(2π·x / λ), wherein A is the amplitude and λ is the wavelength; and a short section of the trapezoidal channel (203) is provided at the outlet of the internal channel.

2. The hybrid microchannel heat sink combining trapezoidal and corrugated shapes according to claim 1, characterized in that: The jet inlet channel (3) comprises a rectangular channel (201) and a trapezoidal channel (203); the upper portion of the jet inlet channel (3) is the rectangular channel (201), and the lower portion of the jet inlet channel (3) is the trapezoidal channel (203); the rectangular channel (201) is a flat rectangular parallelepiped structure, and the trapezoidal channel (203) is an inverted trapezoidal structure.

3. The hybrid microchannel heat sink combining trapezoidal and corrugated shapes according to claim 1, characterized in that: A plurality of evenly distributed internal channels (2) are provided inside the metal copper shell (1); the internal channels (2) are in an inverted "T"-shaped structure.

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