CN112367806A - Resistance-reducing type micro-thin channel liquid cooling radiator - Google Patents
Resistance-reducing type micro-thin channel liquid cooling radiator Download PDFInfo
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- CN112367806A CN112367806A CN202011173169.9A CN202011173169A CN112367806A CN 112367806 A CN112367806 A CN 112367806A CN 202011173169 A CN202011173169 A CN 202011173169A CN 112367806 A CN112367806 A CN 112367806A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
Abstract
The invention provides a resistance-reducing type micro-fine channel liquid cooling radiator which comprises a plurality of liquid cooling radiating modules, a plurality of liquid cooling radiating modules and a plurality of liquid cooling modules, wherein each liquid cooling radiating module comprises a cooling liquid channel and a magnetic fluid channel which is communicated end to end; the magnetic fluid channel is filled with magnetic fluid, and is provided with two sections which are respectively provided with a magnet with opposite magnetic poles and an electrode assembly; the cooling liquid channel is filled with cooling liquid, and one side of the cooling liquid channel is communicated with one section in the magnetic fluid channel. The resistance-reducing type micro-fine channel liquid cooling radiator provided by the invention utilizes the electromagnetic field to drive the magnetic fluid to enable the magnetic fluid to circularly flow in the magnetic fluid channel, thereby driving the cooling liquid communicated with the side surface of the magnetic fluid to run, converting the original liquid-solid contact mode of the cooling liquid and the wall surface into the liquid-liquid contact mode of the cooling liquid and the magnetic fluid, greatly reducing the friction resistance coefficient of the contact surface, simultaneously converting the original non-slip wall surface into the slip wall surface by utilizing the movement of the magnetic fluid, further reducing the flow resistance and achieving the effect of low-resistance heat dissipation.
Description
Technical Field
The invention relates to the field of efficient heat dissipation of electronic devices, in particular to a resistance-reducing type micro-thin channel liquid cooling radiator.
Background
With the development of the micro-electro-mechanical system technology, the integration and high-frequency degree of electronic devices are continuously improved, the characteristic size is continuously reduced, the heat productivity of unit volume is continuously increased, and the heat dissipation is more difficult due to the compact design of equipment, so that the technical problem of high-efficiency heat dissipation is urgently needed to be solved. The traditional air cooling and large-size pipeline liquid convection heat transfer technology is difficult to take away a large amount of heat in time, so that the temperature of an electronic device is increased, and the practicability and reliability of the electronic device are greatly reduced. Therefore, the heat dissipation technology with high heat flux in the micro space has become one of the key factors for restricting the information, electronics, aerospace and defense and military technologies.
The liquid cooling heat dissipation technology of the micro-channel is an efficient heat exchange mode, compared with the traditional air cooling and large-size pipeline liquid convection heat exchange, the micro-channel has a large heat transfer area under the same volume due to the small channel size, and the heat exchange efficiency and the heat exchange coefficient are remarkably improved compared with other heat exchange structures. However, the resistance-reducing type micro-channel liquid cooling radiator has large flow resistance and large flow pressure loss due to the small channel size, and generally needs a high-power circulating pump to drive the fluid to flow, and the use of the high-power circulating pump not only causes additional energy loss, but also causes large operation noise.
Therefore, there is a need to research a resistance-reducing type micro-channel liquid cooling radiator for improving the flowing speed of the cooling liquid, effectively reducing the flowing friction resistance of the cooling liquid and enhancing the heat exchange performance of the radiator on the premise of ensuring the heat exchange effect of the radiator.
Disclosure of Invention
The embodiment of the invention provides a resistance-reducing type micro-fine channel liquid cooling radiator, which is used for improving the flow speed of cooling liquid in a micro-channel and reducing the flow resistance of the cooling liquid so as to solve the problem of heat dissipation of the micro-channel at present.
The embodiment of the invention provides a resistance-reducing type micro-fine channel liquid cooling radiator, which comprises:
a plurality of liquid-cooled heat dissipation modules; every liquid cooling heat dissipation module all includes: the cooling liquid channel and the magnetic fluid channel are communicated end to end;
the magnetic fluid channel is filled with magnetic fluid, and is provided with two sections which are respectively provided with magnets with opposite magnetic poles and electrode assemblies with opposite electrode directions; and the cooling liquid channel is filled with cooling liquid, and one side of the cooling liquid channel is communicated with one section in the magnetic fluid channel.
According to the drag reduction type micro-fine channel liquid cooling radiator provided by the embodiment of the invention, the two sections of the magnetic fluid channel are respectively: a first magnetic fluid channel and a second magnetic fluid channel;
the first magnetic fluid channel and the second magnetic fluid channel are connected with each other and communicated with each other end to end.
According to one embodiment of the invention, the drag reduction type micro-fine channel liquid cooling radiator comprises: an N-pole magnet and an S-pole magnet;
and an S-pole magnet arranged along the flowing direction of the magnetic fluid is arranged in the first magnetic fluid channel, and an N-pole magnet arranged along the flowing direction of the magnetic fluid is arranged in the second magnetic fluid channel.
According to one embodiment of the invention, the drag reduction type micro-fine channel liquid cooling radiator comprises an electrode assembly and a cooling device, wherein the electrode assembly comprises: a first electrode assembly and a second electrode assembly;
the first electrode assembly and the second electrode assembly have opposite directions of corresponding electrodes;
the first electrode assemblies are mounted on two sides of the first magnetic fluid channel, and the second electrode assemblies are mounted on two sides of the second magnetic fluid channel.
According to one embodiment of the drag reduction type microchannel liquid cooling radiator, the first electrode assembly and the second electrode assembly each comprise: the electrode cathode and the electrode anode are oppositely arranged;
the electrode cathode of the first electrode assembly is mounted on the first side of the first magnetic fluid channel, and the electrode anode of the first electrode assembly is mounted on the second side of the first magnetic fluid channel; the electrode anode of the second electrode assembly is mounted on the first side of the second magnetic fluid channel and the electrode cathode of the second electrode assembly is mounted on the second side of the second magnetic fluid channel.
According to the drag reduction type micro-channel liquid cooling radiator provided by the embodiment of the invention, insulating layers are arranged between the electrode cathode of the first electrode assembly and the electrode anode of the second electrode assembly and between the electrode cathode of the second electrode assembly and the electrode anode of the first electrode assembly.
According to one embodiment of the invention, the drag reduction type micro-fine channel liquid cooling radiator comprises an S pole magnet and a S pole magnet, wherein the S pole magnet comprises: a first mounting surface and a first active surface; the N-pole magnet includes: a second mounting surface and a second active surface;
the first mounting surface is connected with the inner wall surface of the first magnetic fluid channel; the second installation surface is connected with the inner wall surface of the second magnetic fluid channel, the first action surface and the second action surface are both provided with strip-shaped grooves for loading the magnetic fluids, the strip-shaped grooves of the first action surface are communicated with the strip-shaped grooves of the second action surface, and one side of the cooling fluid channel is communicated with the strip-shaped grooves of the first action surface or the strip-shaped grooves of the second action surface.
According to one embodiment of the invention, the drag reduction type micro-fine channel liquid cooling radiator further comprises: a housing; each part in each liquid cooling heat dissipation module is installed in the shell.
According to the drag reduction type micro-fine channel liquid cooling radiator provided by the embodiment of the invention, the magnetic fluid and the cooling liquid are two media which are not mutually soluble, the magnetic fluid is a conductive medium, and the cooling liquid is a non-conductive medium.
According to the drag reduction type micro-fine channel liquid cooling radiator provided by the embodiment of the invention, the flow direction of the magnetic fluid at the contact surface of the magnetic fluid and the cooling liquid is the same.
The resistance-reducing type micro-fine channel liquid cooling radiator provided by the invention utilizes the electromagnetic field to drive the magnetic fluid to enable the magnetic fluid to circularly flow in the magnetic fluid channel, thereby driving the cooling liquid communicated with the side surface of the magnetic fluid to run, converting the original liquid-solid contact mode of the cooling liquid and the wall surface into the liquid-liquid contact mode of the cooling liquid and the magnetic fluid, greatly reducing the friction resistance coefficient of the contact surface, simultaneously converting the original non-slip wall surface into the slip wall surface by utilizing the movement of the magnetic fluid, further reducing the flow resistance, and further achieving the effect of low-resistance heat dissipation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a drag reduction type microchannel liquid cooling heat sink provided in an embodiment of the present invention;
fig. 2 is a front view of a liquid-cooled heat dissipation module according to an embodiment of the present invention;
fig. 3 is a right side view of a liquid-cooled heat dissipation module according to an embodiment of the present invention;
fig. 4 is a left side view of a liquid-cooled heat dissipation module according to an embodiment of the present invention;
fig. 5 is a top view of a liquid-cooled heat dissipation module according to an embodiment of the invention;
FIG. 6 is a cross-sectional view of the liquid-cooled heat dissipation module of FIG. 2 at location A-A;
FIG. 7 is a cross-sectional view of the liquid-cooled heat sink module of FIG. 2 at location B-B;
FIG. 8 is a cross-sectional view of the liquid-cooled heat dissipation module of FIG. 5 at a location C-C;
in the figure, 1, a liquid cooling heat dissipation module; 2. a housing; 11. a coolant passage; 12. a magnetic fluid channel; 121. a first magnetic fluid channel; 122. a second magnetic fluid channel; 13. a magnet; 131. an S-pole magnet; 132. an N-pole magnet; 14. an electrode assembly; 141. a first electrode assembly; 142. a second electrode assembly; 15. an insulating layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes, with reference to fig. 1, a resistance-reducing micro-channel liquid-cooled heat sink according to an embodiment of the present invention, where the resistance-reducing micro-channel liquid-cooled heat sink includes: a plurality of liquid cooling heat dissipation modules 1.
For convenience of explanation, the area enclosed by the dashed line in fig. 1 is selected for detailed description, the dashed line area is a single liquid-cooled heat dissipation module 1 of the resistance-reducing type microchannel liquid-cooled heat sink, and each resistance-reducing type microchannel liquid-cooled heat sink includes one or more liquid-cooled heat dissipation modules 1.
As shown in fig. 2, 3, 4, 5, 6, 7 and 8, each liquid-cooled heat dissipation module 1 includes: a cooling liquid channel 11 and a magnetic fluid channel 12 which are communicated end to end.
The magnetic fluid channel 12 is filled with magnetic fluid, the magnetic fluid channel 12 is provided with two sections, and the two sections of magnetic fluid channels are respectively provided with magnets 13 with opposite magnetic poles and electrode assemblies 14 with opposite electrode directions. The magnetic fluid in the magnetic fluid channel 12 realizes self-flowing under the action of an electromagnetic field, and the flowing speed can be controlled by the current magnitude. The cooling liquid channel 11 is filled with cooling liquid, and one side of the cooling liquid channel 11 is communicated with one section in the magnetic fluid channel 12. The cooling liquid can enter the cooling liquid channel by being driven by the external circulating pump, and flows forwards in the cooling liquid channel 11, and meanwhile, the external heat is absorbed, so that the cooling of the heat source is realized. The coolant channel 11 is a straight channel, and the cross section of the channel can be square, rectangular or semicircular.
The magnetic fluid and the cooling liquid are two media which are not mutually soluble. The magnetic fluid is a conductive medium and consists of nanometerMagnetic particles, base liquid and surfactant. Fe may be used3O4、Fe2O3Ni, Co, etc. as magnetic particles, water, organic solvent, oil, etc. as base liquid, and oleic acid, etc. as activator to prevent agglomeration. The cooling fluid may be a non-conductive medium, such as pure water. The magnetic fluid is completely filled in the magnetic fluid channel 12 under the action of the magnetic field, and the magnetic fluid influenced by magnetism only flows in the magnetic fluid channel 12.
The electrode assembly 14 is communicated with an external power supply, and because the magnetic fluid is an electric conductor, after the power supply is switched on, current is formed between the anode and the cathode of the electrode assembly 14, the direction of the current is from the anode to the cathode and is vertical to the direction of a magnetic field, the magnetic fluid is subjected to Lorentz force to move, and the moving direction can be judged according to left-hand rules.
When the resistance-reducing type micro-fine channel liquid cooling radiator works normally, the resistance-reducing type micro-fine channel liquid cooling radiator is tightly attached to a heat source, absorbs heat from the heat source, conducts the heat to cooling liquid flowing in the cooling liquid channel 11, and finally takes away the heat through the cooling liquid.
When the electrode assembly 14 is not powered, no current exists, and no lorentz force can be generated, so that the magnetic fluid is attracted to the surface of the magnet 13 under the action of the magnetic field, is filled in the magnetic fluid channel 12 and is kept still. When the coolant flows through the coolant channel 11, the surface thereof will be in contact with the magnetic fluid, thereby achieving liquid-liquid interface contact, resulting in a great decrease in the frictional resistance of the surface thereof.
When the resistance-reducing type micro-channel liquid cooling radiator carries out normal heat dissipation work, the electrode assembly 14 in the radiator can be connected with an external power supply, the conductive magnetofluid generates current, the current direction depends on the arrangement position of the electrodes, and the two sections of magnetofluid circularly flow along the magnetofluid channel 12 under the action of Lorentz force. The magnitude of the Lorentz force can be controlled by adjusting the magnitudes of the magnetic field and the current, so that the flow speed of the magnetic fluid is adjusted. The flow direction of the magnetic fluid can also be controlled by adjusting the current direction. Because certain viscosity exists between the cooling liquid and the magnetic fluid, when the magnetic fluid moves under the action of Lorentz force, the cooling liquid additionally contacted with the contact surface of the magnetic fluid moves in the same direction, and if the moving direction is consistent with the flowing direction of the cooling liquid, the magnetic fluid plays a role of a forward sliding wall surface, which is equivalent to providing extra forward power for the cooling liquid, accelerating the flowing of the cooling liquid, further reducing the frictional resistance on the upper surface of the cooling liquid, and finally realizing the low-resistance flowing characteristic of the resistance-reducing type micro-channel liquid cooling radiator.
According to the resistance-reducing type micro-fine channel liquid cooling radiator provided by the embodiment of the invention, the magnetic fluid is driven by the electromagnetic field to enable the magnetic fluid to circularly flow in the magnetic fluid channel, so that the cooling liquid communicated with the side surface of the magnetic fluid is driven to run, the original liquid-solid contact mode of the cooling liquid and the wall surface is converted into the liquid-liquid contact mode of the cooling liquid and the magnetic fluid, the friction resistance coefficient of the contact surface is greatly reduced, meanwhile, the movement of the magnetic fluid is also utilized to convert the cooling liquid contact surface from the original non-slip wall surface into the slip wall surface, the flow resistance is further reduced, and the effect of low-resistance heat dissipation is achieved.
In the drag reduction type micro-fine channel liquid cooling radiator provided by the embodiment of the present invention, as shown in fig. 6, 7 and 8, the two sections of the magnetic fluid channel 12 are respectively: a first magnetic fluid channel 121 and a second magnetic fluid channel 122. The first and second magnetic fluid channels 121 and 122 are interconnected and in head-to-tail communication with each other. In this embodiment, a first magnetic fluid channel 121 is connected to the top of a second magnetic fluid channel 122.
Wherein, magnet includes: an N-pole magnet 132 and an S-pole magnet 131. An S-pole magnet 131 disposed in the flow direction of the magnetic fluid is installed in the first magnetic fluid channel 121, and an N-pole magnet 132 disposed in the flow direction of the magnetic fluid is installed in the second magnetic fluid channel 122. In this embodiment, the first magnetic fluid channel 121 is installed above the second magnetic fluid channel 122, the S-pole magnet 131 is located above the N-pole magnet 132, and the N-pole magnet 132 is located at a side close to the coolant channel 11.
The fine passageway liquid cooling radiator of drag reduction formula still includes: a housing 2; all parts in each liquid cooling heat dissipation module 1 are installed in the shell 2. When the drag reduction type micro-fine channel liquid cooling radiator normally works, the bottom of the shell 2 is tightly attached to a heat source, heat is absorbed from the heat source and is transmitted to cooling liquid flowing inside the radiator, and finally the heat is taken away through the cooling liquid.
If the flow direction of the magnetic fluid needs to be changed, the S-pole magnet 131 can be arranged in the first magnetic fluid channel 121, and the N-pole magnet 132 can be arranged in the second magnetic fluid channel 122, so that the direction of the Lorentz force applied to the magnetic fluid can be adjusted by changing the direction of the magnetic field.
Corresponding to the first magnetic fluid channel 121 and the second magnetic fluid channel 122, the electrode assembly 14 includes: a first electrode assembly 141 and a second electrode assembly 142. The first electrode assembly 141 and the second electrode assembly 142 have opposite directions of the corresponding electrodes. The first electrode assembly 141 is installed at both sides of the first magnetic fluid channel 121, and the second electrode assembly 142 is installed at both sides of the second magnetic fluid channel 122.
Wherein the first electrode assembly 141 and the second electrode assembly 142 each include: an electrode cathode and an electrode anode which are oppositely arranged. The electrode cathode of the first electrode assembly 141 is mounted on the first side of the first magnetic fluid channel and the electrode anode of the first electrode assembly 141 is mounted on the second side of the first magnetic fluid channel. The anode electrode of the second electrode assembly 142 is mounted on a first side of the second magnetic fluid channel and the cathode electrode of the second electrode assembly 142 is mounted on a second side of the second magnetic fluid channel. That is, in the present embodiment, the two-layered electrodes in the first electrode assembly 141 and the second electrode assembly 142 are bounded by the interface of the N-pole magnet 132 and the S-pole magnet 131. The electrode cathode and the electrode anode of the first electrode assembly 141 are disposed at both sides of the S-pole magnet 131, respectively. The electrode cathode and the electrode anode of the second electrode assembly 142 are disposed at both sides of the N-pole magnet 132, respectively. The electrode cathodes and the electrode anodes of the first electrode assembly 141 are arranged opposite to the electrode cathodes and the electrode anodes of the second electrode assembly 142. If the electrode anode of the first electrode assembly 141 is at the left side, the electrode anode of the second electrode assembly 142 is at the right side.
If the flow direction of the magnetic fluid needs to be changed, the electrode cathodes and the electrode anodes of the first electrode assembly 141 and the second electrode assembly 142 can also be changed, and the direction of the Lorentz force applied to the magnetic fluid can be adjusted by changing the current direction. It is only necessary to ensure that the first electrode assembly 141 and the second electrode assembly 142 have opposite directions of their corresponding electrodes.
In order to ensure the stable operation of the resistance-reducing micro-channel liquid-cooled radiator, insulating layers 15 are respectively arranged between the electrode cathode of the first electrode assembly 141 and the electrode anode of the second electrode assembly 142, and between the electrode cathode of the second electrode assembly 142 and the electrode anode of the first electrode assembly 141. The insulating layer 15 is filled with an insulating material for insulating the electrode. At the same time, an insulating layer 15 is also provided between the housing 2 and each electrode to ensure safe operation of the heat sink.
To prevent the magnetic fluid from entering the coolant channel 11 from the magnetic fluid channel 12, the S-pole magnet 131 includes: a first mounting surface and a first active surface. The N-pole magnet 132 includes: a second mounting surface and a second active surface. The first mounting surface is connected to an inner wall surface of the first magnetic fluid channel 121 to fix the S-pole magnet 131 in the first magnetic fluid channel 121. The second mounting surface is connected to the inner wall surface of the second magnetic fluid channel 122 so that the N-pole magnet 132 is fixed in the second magnetic fluid channel 122. The first action surface and the second action surface are both provided with strip-shaped grooves for loading magnetic fluid, and the strip-shaped grooves of the first action surface are communicated with the strip-shaped grooves of the second action surface, so that the magnetic fluid can flow in the strip-shaped grooves after the electrode assembly 14 is electrified. According to the flowing condition of the magnetic fluid, the shape of the groove can be correspondingly adjusted to adapt to different working conditions. Depending on the position of the coolant channel 11, one side of the coolant channel 11 can communicate with the strip-shaped groove of the first active surface or the strip-shaped groove of the second active surface.
When the resistance-reducing type micro-fine channel liquid cooling radiator normally works, the bottom of the shell 2 is tightly attached to a heat source, heat is absorbed from the heat source and is conducted to cooling liquid flowing in the cooling liquid channel 11 in the radiator, and finally the heat is taken away through the cooling liquid. When the electrode assembly 14 is not powered, no current exists, and no lorentz force can be generated, so that the magnetic fluid is attracted to the surface of the magnet 13 under the action of the magnetic field, is filled in the magnetic fluid channel 12 and is kept still. When the coolant flows through the coolant channel 11, the upper surface thereof will come into contact with the magnetic fluid, thereby achieving liquid-liquid interface contact, resulting in a great decrease in the frictional resistance of the upper surface.
When the resistance-reducing micro-channel liquid cooling radiator is used for normal heat dissipation, the electrode assembly 14 in the radiator can be connected with an external power supply, so that current is generated between the electrode anode and the electrode cathode through the conductive magnetic fluid, the current direction depends on the arrangement positions of the electrode cathode and the electrode anode, and the direction is from the electrode anode to the electrode cathode. Because the N-pole magnet 132 is located at the bottom, the S-pole magnet 131 is located at the top, and the magnetic induction lines outside the magnets start from the N-pole magnet 132 and return to the S-pole magnet 131, the magnetic fluid in the magnetic fluid channel 12 located at the top and bottom of the magnets is acted by the downward magnetic induction lines, so that the direction of the lorentz force applied to the magnetic fluid is perpendicular to the direction of the current and the magnetic field according to the upper left rule, the direction is exactly the same as the direction of the magnetic fluid channel 12, and the positions of the first electrode assembly 141 and the second electrode assembly 142 are required to be arranged in an opposite way to each other in order that the magnetic fluid circularly flows in the magnetic fluid channel 12 under the action of the lorentz. The magnitude of the Lorentz force can be controlled by adjusting the magnitudes of the magnetic field and the current, so that the flow speed of the magnetic fluid is adjusted. The flow direction of the magnetic fluid can be controlled by adjusting the positions of the electrode anode and the electrode cathode, so that the flow direction of the magnetic fluid below the magnet 13 is consistent with the flow direction of the cooling liquid, and the contact surface of the cooling liquid and the magnetic fluid is changed into a sliding wall surface with a certain speed, thereby further reducing the frictional resistance of the upper surface of the cooling liquid and finally realizing the low-resistance flow characteristic of the resistance-reducing micro-channel liquid cooling radiator.
Because the flow direction of the magnetic fluid on the contact surface is the same as that of the cooling liquid, the upper surface of the cooling liquid belongs to a sliding wall surface condition, and the functions of accelerating the flow of the cooling liquid and further reducing the friction resistance of the upper surface of the cooling liquid are achieved, so that the resistance-reducing type micro-fine channel liquid cooling radiator has lower flow resistance than that of a conventional micro-fine channel radiator. Meanwhile, the magnetic fluid is in the space above the cooling liquid, so that the cooling liquid is not influenced to cool a heat source below the cooling liquid, and the heat radiation performance of the resistance-reducing micro-fine channel liquid cooling radiator is not greatly influenced.
In summary, the resistance-reducing type micro-fine channel liquid-cooled radiator provided by the embodiment of the invention drives the magnetic fluid by using the electromagnetic field to enable the magnetic fluid to circularly flow in the magnetic fluid channel, thereby driving the cooling liquid communicated with the side surface of the magnetic fluid to run, and converting the original liquid-solid contact mode of the cooling liquid and the wall surface into the liquid-liquid contact mode of the cooling liquid and the magnetic fluid, so that the friction resistance coefficient of the contact surface is greatly reduced, and meanwhile, the movement of the magnetic fluid is also used to convert the original non-slip wall surface of the cooling liquid contact surface into the slip wall surface, so that the flow resistance is further reduced, and the effect of low-resistance heat dissipation is achieved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a little thin passageway liquid cooling radiator of drag reduction formula which characterized in that includes:
a plurality of liquid-cooled heat dissipation modules; every liquid cooling heat dissipation module all includes: the cooling liquid channel and the magnetic fluid channel are communicated end to end;
the magnetic fluid channel is filled with magnetic fluid; the magnetic fluid channel is provided with two sections which are respectively provided with magnets with opposite magnetic poles and electrode assemblies with opposite electrode directions; and the cooling liquid channel is filled with cooling liquid, and one side of the cooling liquid channel is communicated with one section in the magnetic fluid channel.
2. The drag reduction type micro fine channel liquid cooling radiator as claimed in claim 1, wherein the two sections of the magnetic fluid channel are respectively: a first magnetic fluid channel and a second magnetic fluid channel;
the first magnetic fluid channel and the second magnetic fluid channel are connected with each other and communicated with each other end to end.
3. The drag reducing micro-fine channel liquid cooled heat sink of claim 2, wherein the magnet comprises: an N-pole magnet and an S-pole magnet;
and an S-pole magnet arranged along the flowing direction of the magnetic fluid is arranged in the first magnetic fluid channel, and an N-pole magnet arranged along the flowing direction of the magnetic fluid is arranged in the second magnetic fluid channel.
4. The drag reducing microchannel liquid cooled heat sink of claim 3, wherein the electrode assembly comprises: a first electrode assembly and a second electrode assembly;
the first electrode assembly and the second electrode assembly have opposite directions of corresponding electrodes;
the first electrode assemblies are mounted on two sides of the first magnetic fluid channel, and the second electrode assemblies are mounted on two sides of the second magnetic fluid channel.
5. The drag reducing microchannel liquid cooled heat sink of claim 4, wherein the first electrode assembly and the second electrode assembly each comprise: the electrode cathode and the electrode anode are oppositely arranged;
the electrode cathode of the first electrode assembly is mounted on the first side of the first magnetic fluid channel, and the electrode anode of the first electrode assembly is mounted on the second side of the first magnetic fluid channel; the electrode anode of the second electrode assembly is mounted on the first side of the second magnetic fluid channel and the electrode cathode of the second electrode assembly is mounted on the second side of the second magnetic fluid channel.
6. The drag reducing microchannel liquid cooled heat sink of claim 5, wherein an insulating layer is disposed between the electrode cathode of the first electrode assembly and the electrode anode of the second electrode assembly, and between the electrode cathode of the second electrode assembly and the electrode anode of the first electrode assembly.
7. The drag reducing micro-fine channel liquid cooled heat sink of claim 3, wherein the S pole magnet comprises: a first mounting surface and a first active surface; the N-pole magnet includes: a second mounting surface and a second active surface;
the first mounting surface is connected with the inner wall surface of the first magnetic fluid channel; the second installation surface is connected with the inner wall surface of the second magnetic fluid channel, the first action surface and the second action surface are both provided with strip-shaped grooves for loading the magnetic fluids, the strip-shaped grooves of the first action surface are communicated with the strip-shaped grooves of the second action surface, and one side of the cooling fluid channel is communicated with the strip-shaped grooves of the first action surface or the strip-shaped grooves of the second action surface.
8. The drag reducing microchannel liquid cooled heat sink of claim 1, further comprising: a housing; each part in each liquid cooling heat dissipation module is installed in the shell.
9. The drag reducing microchannel liquid cooled heat sink of any of claims 1-8, wherein the magnetic fluid and the cooling liquid are two media that are immiscible with each other, the magnetic fluid being a conductive medium and the cooling liquid being a non-conductive medium.
10. The drag reducing microchannel liquid cooled heat sink of any of claims 1-8, wherein the magnetic fluid flows in the same direction at the coolant interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113916771A (en) * | 2021-09-01 | 2022-01-11 | 哈尔滨工业大学 | Road surface slippery state sensor calibration device and method for monitoring dynamic friction coefficient |
| CN114501937A (en) * | 2022-01-21 | 2022-05-13 | 电子科技大学 | Magnetoni effect-based magnetic fluid self-circulation heat dissipation system and heat dissipation method |
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