The cabinet backboard of band liquid metal heat radiation mechanism
Technical field
The present invention relates to a kind of cabinet backboard, particularly a kind of integrated liquid metal heat radiation mechanism, the cabinet backboard that liquid metal capable of using is derived chip heat and utilize the wide area of metal cabinet backboard to dispel the heat.
Background technology
Existing cabinet backboard generally only realizes going along with sb. to guard him defencive function.For guaranteeing good electromagnetic screen and reliable package quality, metal material is used the most extensive.Simultaneously, the most important problem of cabinet inside be efficiently, stablize, chip cooling management cheaply.Current, individual chips heating radiator on the market (like air-cooled, heat pipe, water-cooled etc.) is for guaranteeing enough area of dissipations, all can bring bulkyly, occupies the cabinet volume, simultaneously a difficult problem such as inconvenient installation.In fact; If can chip heat be exported to metal cabinet backboard; High-termal conductivity and the sufficient area of dissipation of cabinet backboard by metal material dispel the heat; To bring excellent more heat dispersion undoubtedly, and realize comfortable user experience more such as the saving of space and material, and zero noise low energy consumption.Yet; The selection of suitable cooling working medium is the key that chip heat is conducted to the cabinet backboard; Reasonably working medium must possess outstanding heat transfer potential, be easy to integrated and efficiently type of drive, must be difficult for that evaporation is leaked, physico-chemical property is stable, safety non-toxic simultaneously.
2002, (Liu Jing, Monday was glad, a kind of radiating device of chip radiation, grant number: propose first 02257291.0) near the liquid metals of fusing point room temperature is used for chip cooling in patent for we.Because liquid metals has the thermal conductivity far above nonmetal fluid such as water, air and even other mixing materials, thereby it during as the heat eliminating medium of die terminals, can be realized very excellent heat transfer potential.Particularly, because liquid metals has high conductivity, thereby can adopt the electromagnetic pump of no any moving component to drive, it is simple in structure, and power consumption is extremely low, and is very easy to realize microminiaturized and integrated on a large scale.
For this reason, the present invention proposes a kind of cabinet backboard that utilizes liquid metal that chip heat is derived and utilizes the wide area of metal cabinet backboard to dispel the heat.Based on liquid metal thermotransport ability efficiently and the wide area of dissipation of cabinet backboard, the present invention can realize chip cooling ability efficiently, has effectively simplified the space of independent heating radiator in the cabinet simultaneously.Evaporation is leaked, physico-chemical property is stable because liquid metal is difficult for, safety non-toxic, and the present invention can be long-term, and is stable, efficient operation.
Summary of the invention
The objective of the invention is to utilize the liquid metal of high heat conductance that chip heat is exported to the cabinet backboard and dispel the heat, realize the efficient chip heat management, effectively saved the space of independent heating radiator in the cabinet simultaneously with this.
Technical scheme of the present invention is following:
The cabinet backboard of band liquid metal heat radiation provided by the invention mechanism, as shown in Figure 1, said cabinet backboard 3 is established first flow in being and is had the cabinet backboard of a liquid metal heat radiation mechanism;
Said liquid metal heat radiation mechanism is made up of cold drawing 1 and driving pump 2 and connecting tube 4: said cold drawing 1 is provided with the flat board of second runner in being;
The two ends runner mouth of the first flow of said cabinet backboard 3 is connected through connecting tube 4 with the two ends runner mouth of second runner of said cold drawing 1 respectively and forms flow cycle, and it is connected and forms to flow in the runner of flow cycle has liquid metals; Be used to be communicated with installing drive pump 2 at least one connecting tube of second runner of first flow and said cold drawing 1 of said cabinet backboard 3, said driving pump 2 drives liquid metals and in said flow cycle, flows.
Said cold drawing 1 is made up of plate cold drawing base 7 and the cold drawing lid 6 that is placed on said cold drawing base 7 upper surfaces; Said second runner is located within the said dull and stereotyped cold drawing base 7; Said cold drawing lid 6 is provided with two through hole, and flow-path tube is housed respectively on the two through hole; Said flow-path tube is connected with the two ends runner mouth of second runner of said cold drawing 1 through connecting tube respectively; Installing drive pump 2 at least one connecting tube wherein;
Perhaps
The connecting tube of second runner of first flow and said cold drawing that is used to be communicated with said cabinet backboard is for driving the siphon piping that liquid metals circulates.
Said cold drawing base 7 is copper, aluminium, stainless steel, graphite or adamas with the material of said cold drawing lid 6;
Described cabinet backboard material is copper, aluminium, iron or the stainless steel with high heat conductance.
Said second runner is linear runner, zigzag runner, spiral flow channel or the tree-like runner of branch, and its width of flow path is 1 micron~50 millimeters.
Said first flow is welded on the cabinet back of the body lateral surface or is welded on the cabinet back of the body medial surface; It is linear runner, zigzag runner, spiral flow channel or the tree-like runner of branch, and its width of flow path is 1 micron~500 millimeters.
Described driving pump is a mechanical pump, electromagnetic pump, and piezoelectric pump, electric Wetting pump, or directly realize that through the thermal siphon phenomenon no pump circulation of fluid flows.
Described driving pump is many series connections of pumps or many parallels connection of pumps.
Said connecting line adopts plastic tube or metal tube.
Described liquid metal is to present liquid gallium, mercury, gallium base bianry alloy, gallium based multicomponent alloy, indium-base alloy, bismuth-base alloy, mercury-base alloy or Na-K alloy under the room temperature.
Said gallium base bianry alloy is the gallium indium alloy, gallium lead alloy or gallium mercury alloy; Said gallium based multicomponent alloy is gallium-indium-tin alloy or gallium indium tin kirsite.
In actual motion; Cold drawing 1 in the cabinet backboard of band liquid metal heat radiation of the present invention mechanism is placed near the chip; Liquid metal with outstanding capacity of heat transmission circulates in loop, and liquid metal is at first taken away chip heat through cold drawing 1 in flowing; Subsequently, the liquid metal of intensification brings to heat cabinet backboard 3 and is dispersed in the surrounding air under the driving of driving pump 2, realizes the purpose of chip high efficiency and heat radiation with this.
For guaranteeing good heat absorption capacity, cold drawing 1 (comprising cold drawing base 7 and cold drawing lid 6) material can adopt copper, aluminium, stainless steel, graphite or the adamas etc. with high heat conductance; Second runner can be arranged as linear runner, zigzag runner, spiral flow channel or the tree-like runner of branch in the cold drawing 1, and its width of flow path is 1 micron~50 millimeters;
The purpose of driving pump 2 is to produce the liquid metal of certain pressure-driven and in flow cycle, circulates; Driving pump 2 can adopt mechanical pump, electromagnetic pump, piezoelectric pump or electric Wetting pump etc.; Different according to processing technology, driving pump 2 profile geometric scales can not wait from the nanometer to the decimetre; Because liquid metal has high conductivity, the electromagnetic pump of movement-less part is that enforcement of the present invention is first-selected; The typical advantage of electromagnetic pump is not have mechanical moving component, drives the efficient height, is convenient to microminiaturization and mass, and with low cost, energy consumption is low, and the life-span is long etc.Typical electromagnetic pump and manufacture craft can be with reference to Chinese invention patent application (a kind of electromagnetic pumps that is used to drive conductive fluid and preparation method thereof, 200810227046.1, Liu Ming, Liu Jing, Monday is glad).
Cabinet backboard 3 dispels the heat to the external world by the metal backing area of dissipation; Traditional relatively cabinet backboard, integrated first flow makes things convenient for liquid metal fluid with heat transferred cabinet backboard on it; Cabinet backboard 3 materials can adopt copper, aluminium, iron or the stainless steel etc. with high heat conductance; Integrated first flow can be arranged as linear runner, zigzag runner, spiral flow channel or the tree-like runner of branch on it, and its width of flow path is 1 micron~500 millimeters runners; Cabinet backboard 3 radiating surfaces can be processed into light face or fin surface; Cabinet backboard 3 can utilize Natural Heat Convection fully, also can when the chip thermal value is big especially, dispose the fan enhance heat.
Connecting line 4 can be selected plastic tube or metal tube; Wherein, plastic tube has good pliability, is convenient to install, and can be used as first-selection.
The characteristic feature of liquid metal is can present liquid state under the room temperature among the present invention, and described liquid metal is to present liquid gallium, mercury, gallium base bianry alloy, gallium based multicomponent alloy, indium-base alloy, bismuth-base alloy, mercury-base alloy or Na-K alloy under the room temperature.
Said gallium base bianry alloy is the gallium indium alloy, gallium lead alloy, gallium mercury alloy; Said gallium based multicomponent alloy is gallium-indium-tin alloy or gallium indium tin kirsite; Gallium-base alloy is because characteristics such as nontoxic, stable in properties can be used as first-selection.
The advantage of the cabinet backboard of band liquid metal heat radiation of the present invention mechanism is: because the present invention has made full use of cabinet backboard radiating surface, therefore can reach more outstanding heat dispersion, and effectively save independent heating radiator space in the cabinet.Simultaneously, because the introducing of liquid metal heat-conducting medium, total system possesses outstanding thermotransport ability, and Drive Structure simply is easy to integrated, is a kind of cabinet backboard of realizing the efficient chip heat radiation.
Description of drawings
Accompanying drawing 1 is the structural representation of the cabinet backboard of band liquid metal heat radiation of the present invention mechanism;
Accompanying drawing 2 is the structural representation of cold drawing 1;
Accompanying drawing 3 is the structural representation of cabinet backboard 3 (a kind of embodiment).
Embodiment
Further describe the present invention below in conjunction with accompanying drawing and specific embodiment.
As shown in the figure, the cabinet backboard of band liquid metal heat radiation provided by the invention mechanism, said cabinet backboard 3 are established first flow in being and are had the cabinet backboard of a liquid metal heat radiation mechanism;
Said liquid metal heat radiation mechanism is made up of cold drawing 1 and driving pump 2 and connecting tube 4: said cold drawing 1 is provided with the flat board of second runner in being;
The two ends runner mouth of the first flow of said cabinet backboard 3 is connected through connecting tube 4 with the two ends runner mouth of second runner of said cold drawing 1 respectively, and forms flow cycle, and it is connected and forms mobilely in the runner of flow cycle has a liquid metals; Be used to be communicated with installing drive pump 2 on the connecting tube of second runner of first flow and said cold drawing 1 of said cabinet backboard 3, said driving pump 2 drives liquid metals and in said flow cycle, flows.
Fig. 2 is the structural representation of cold drawing 1, and cold drawing 1 is made up of plate cold drawing base 7 and the cold drawing lid 6 that is placed on said cold drawing base 7 upper surfaces; Said second runner is located within the said dull and stereotyped cold drawing base 7; Said cold drawing lid 6 is provided with two through hole, and flow-path tube is housed respectively on the two through hole; Said flow-path tube is connected with the two ends runner mouth of second runner of said cold drawing 1 through connecting tube respectively; Installing drive pump 2 at least one connecting tube wherein.
Said cold drawing base 7 all can be copper, aluminium, stainless steel, graphite or adamas (present embodiment is a metallic copper) with the material of said cold drawing lid 6;
The cabinet backboard material of present embodiment is the copper (can certainly adopt aluminium material, the cabinet backboard of iron material matter or stainless steel) with high heat conductance.
Second runner of present embodiment is linear runner, zigzag runner, spiral flow channel or the tree-like runner of branch (present embodiment adopts the zigzag runner, and is as shown in Figure 2), and width of flow path all can 1 micron~50 millimeters scopes.
The first flow of present embodiment takes it is welded on the cabinet back of the body lateral surface (be welded in certainly on the cabinet back of the body medial surface also can); It can take linear runner, zigzag runner, spiral flow channel or the tree-like runner of branch or (present embodiment adopts zigzag stream, and is as shown in Figure 3), and the first flow width all can 1 micron~500 millimeters scopes.
The driving pump 2 that is arranged on the connecting tube can many series connections of pumps or many parallels connection of pumps.Many series connections of pumps need a plurality of pump housings to join end to end, and the liquid that flows out from previous pump continues to flow into an adjacent back pump, are activated power once more and quicken.Many series connections of pumps can realize the repeatedly acceleration of fluid, and the drive ram of loop is promoted significantly, have improved the thermotransport ability.Many parallels connection of pumps need a plurality of pump parallel arranged, a shared import and an outlet.A plurality of pumps produce driving force simultaneously after multiply liquid is extracted in same import, make the liquid of a plurality of passages all be accelerated and outflow outlet simultaneously.Therefore, under same drive ram situation, the flow of loop promotes significantly, has improved the thermotransport ability.Driving pump 2 can be mechanical pump, electromagnetic pump, and piezoelectric pump, electric Wetting pump perhaps directly utilizes the circulation of thermosyphon effect drive fluid, and realizes no pump operation; Utilize thermosyphon effect to make and have two sections vertically arranged pipeline sections in the whole pipeline; And there is temperature difference in fluid in two sections pipeline sections; Utilize the different temperatures fluid to have different densities and the two pipeline section pressure differentials that cause come drive fluid to flow with this, thereby realize the purpose of heat transportation.Present embodiment is a first-selection to adopt electromagnetic pump, and the electromagnetism pump structure is in the applicant's Chinese invention patent application (a kind of electromagnetic pump that is used to drive conductive fluid and preparation method thereof, 200810227046.1; Liu Ming; Liu Jing, Monday is glad) describe to some extent, repeat no more at this.
Said connecting line adopts plastic tube or metal tube.
Described liquid metal is to present liquid gallium, mercury, gallium base bianry alloy, gallium based multicomponent alloy, indium-base alloy, bismuth-base alloy, mercury-base alloy or Na-K alloy under the room temperature.
Said gallium base bianry alloy is the gallium indium alloy, gallium lead alloy, gallium mercury alloy; Said gallium based multicomponent alloy is gallium-indium-tin alloy or gallium indium tin kirsite.
Cold drawing lid 6 and cold drawing base 7.The material characteristics of cold drawing 1 is to possess suitable thermal conductivity and good liquid metal compatibility.Its material can adopt copper, aluminium, stainless steel, graphite, adamas and various compound substances etc.Cold drawing 1 inner flow passage can be arranged as linear, " Z " shape, spirality, fractal tree-like etc.Its width of flow path can not wait from 1 micron to 50 millimeters.Cross section of fluid channel can be circular, rectangle, triangle, abnormity etc.Simultaneously, flow import and outlet breeze way can be set, to reduce resistance to flow in the runner.Cold drawing 1 processing mode can be selected according to practical implementation flexibly, such as the casting or the machine work that can be selected to the processing of conventional yardstick, is used for the soft etching, Laser Processing, electrosparking, chemical etching of micro-nano processing etc.
Driving pump 2 can adopt mechanical pump, electromagnetic pump, piezoelectric pump or electric Wetting pump etc.Different according to processing technology, the geometric scale of driving pump 2 can not wait from the nanometer to the decimetre.Because liquid metal has high conductivity, the electromagnetic pump of movement-less part is the first-selection of system implementation.Typical electromagnetic pump is made up of pair of magnets and pair of electrodes, and magnet is arranged on the upper and lower surfaces of the pump housing, and pair of electrodes is arranged on the pump housing two side walls in opposite directions, and the magnets magnetic fields direction can be vertical with the electrode current direction or (non-parallel position) at an angle; Magnet can be selected permanent magnet or electromagnet, and its magnetic induction density can be in 0.001 to 10 tesla's scope.The electromagnetic pump input current can directly obtain or be equipped with battery from chassis power supply, and its power consumption is in 0.001W arrives the 100W scope.Typical electromagnetic pump material and technology can (Monday be glad for Liu Ming, Liu Jing, a kind of electromagnetic pump that is used to drive conductive fluid and preparation method thereof, application number: 200810227046.1 with reference to Chinese patent.Liu Jing, Monday is glad, a kind of radiating device of chip radiation, grant number: 02257291.0).For improving driving force, driving pump 2 can carry out flexible SP, improves the thermotransport ability with the liquid flow that produces big flux.
Accompanying drawing 3 is the basic block diagram of cabinet backboard in the system shown in Figure 1.Cabinet backboard 3 materials can adopt copper, aluminium, iron, stainless steel and the various composite metals etc. with high heat conductance.Its integrated liquid metal runner can be arranged as linear, " Z " shape, spirality, fractal tree-like etc.Integration mode can adopt outside weldings formula (Fig. 4), or inside inlays, and machined flow etc. in the backboard.Width of flow path can not wait from 1 micron to 500 millimeters.The backboard radiating surface can be processed into light face or fin mode.Cabinet backboard 3 can utilize Natural Heat Convection fully, also can when the chip thermal value is big especially, dispose fan enhance heat effect separately.
Connecting line 4 can be selected plastic tube or metal tube.Wherein, present embodiment adopts plastic tube to have good pliability, is convenient to install, and can be used as first-selection.
The characteristic feature of liquid metal is can present liquid state under the room temperature, and gallium, mercury, gallium base bianry alloy, gallium based multicomponent alloy, indium-base alloy, bismuth-base alloy, mercury-base alloy or Na-K alloy all are applicable to the present invention.
Said gallium base bianry alloy is the gallium indium alloy, gallium lead alloy, gallium mercury alloy; Said gallium based multicomponent alloy is gallium-indium-tin alloy or gallium indium tin kirsite.Characteristics such as gallium-base alloy (comprising gallium base bianry alloy, gallium based multicomponent alloy) is nontoxic because of it, stable in properties can be used as first-selection.The liquid metal of present embodiment adopts gallium-indium-tin alloy.
The present invention can be used for the heat radiation of all kinds of power systems such as desktop computer, notebook computer, industrial computer, communication base station, laser system cabinet and even mobile phone etc.
What should explain at last is that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is specified with reference to embodiment; Those of ordinary skill in the art is to be understood that; Technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.