CN100543975C - Liquid-cooled jacket - Google Patents

Abstract

The invention provides a kind of liquid-cooled jacket, this liquid-cooled jacket can cool off heaters such as CPU effectively.CPU (101) is arranged on the precalculated position of this liquid-cooled jacket (J1), the heat that this liquid-cooled jacket (J1) is produced CPU (101) pass to supply with from the hot conveyance fluid feed unit of outside, at the cooling water of the internal circulation of this liquid-cooled jacket, this liquid-cooled jacket (J1) has: the 1st stream (A1) of hot conveyance fluid feed unit side; By the 2nd stream group (B1) that constitutes from a plurality of the 2nd streams (B1a) of the 1st stream (A1) branch; And the 3rd stream (C1) that makes a plurality of the 2nd streams (B1a) set in the downstream of a plurality of the 2nd streams (B1a), CPU (101) mainly carries out heat exchange in the 2nd stream group (B1).

Description

Liquid-cooled jacket

Technical field

The present invention relates to liquid-cooled jacket that heaters such as CPU are cooled off.

Background technology

In the last few years, be of the raising of the electronic equipment of representative with the personal computer along with its performance, the caloric value of the CPU that is carried (heater) increases, the cooling of the CPU ever more important that becomes.In the past, in order to cool off CPU, use the heat abstractor of air cooling blower fan mode, but the problems such as the cooling limit under the fan noise, air cooling way receive publicity, as the follow-on type of cooling, liquid-cooled jacket (being also referred to as water collar, liquid cooling module) attracts tremendous attention.

About this technology, for example proposing has following liquid-cooled jacket: it forms the shape that crawls, be built-in with metal tube, the two ends of this metal tube are provided with and are taken into mouth, outlet (with reference to hurdle, the 2nd row～lower-left, the 2nd page of upper right hurdle the 15th row, Fig. 1, Fig. 2 of Japanese kokai publication sho 63-293865 communique).

But if as the described liquid-cooled jacket of above-mentioned patent documentation, the cooling stream that but current are logical is 1, and then the suffered pressure loss of cooling water can become big.Thus, have not only and can't cool off CPU effectively, and must increase the problem of the output of the pump of supplying with cooling water.

Summary of the invention

Therefore, the present invention is in order to address the above problem, and its problem is to provide a kind of liquid-cooled jacket that can cool off heaters such as CPU effectively.

As the means that solve above-mentioned problem, in liquid-cooled jacket of the present invention, heater is installed on the precalculated position of this liquid-cooled jacket, the heat that this liquid-cooled jacket produces this heater pass to supply with from the hot conveyance fluid feed unit of outside, at the hot conveyance fluid of this liquid-cooled jacket internal circulation, it is characterized in that this liquid-cooled jacket has: the 1st stream of above-mentioned hot conveyance fluid feed unit side; The 2nd stream group that constitutes by a plurality of the 2nd streams from above-mentioned the 1st stream branch; And the 3rd stream that makes these a plurality of the 2nd stream set in the downstream of above-mentioned a plurality of the 2nd streams, above-mentioned heater mainly carries out heat exchange in above-mentioned the 2nd stream group.

According to this liquid-cooled jacket, be fed into the 1st stream from the hot conveyance fluid of the hot conveyance fluid feed unit of outside.Then, the order according to the 2nd stream group, the 3rd stream group circulates.And then the heat that heater produced is mainly carried out heat exchange in the 2nd stream group, passes to hot conveyance fluid thus.Consequently, heater is properly cooled.

Herein, because the 2nd stream group is made of a plurality of the 2nd streams from the 1st stream branch, these a plurality of the 2nd streams gathers at the 3rd stream, so compare with the situation that the 2nd stream forms 1 shape that crawls, respectively the length of the 2nd stream is extremely short.Thus, the pressure loss of the hot conveyance fluid that circulates in a plurality of the 2nd streams is compared minimum with the pressure loss of the hot conveyance fluid that circulates in the 2nd stream of above-mentioned 1 long flow path length.And the 2nd stream B5a, the B5a of the liquid-cooled jacket J6 of the 6th execution mode such (with reference to Figure 26) are not isolated the 2nd adjacent among the present invention stream fully as described later yet.

Therefore,, use the hot conveyance fluid feed unit (for example pump) of the little outside of output to supply with hot conveyance fluid, it is circulated in liquid-cooled jacket, can cool off heaters such as CPU effectively according to this liquid-cooled jacket.

And, in liquid-cooled jacket of the present invention, heater is installed on the precalculated position of this liquid-cooled jacket, the heat that this liquid-cooled jacket produces this heater pass to supply with from the hot conveyance fluid feed unit of outside, at the hot conveyance fluid of this liquid-cooled jacket internal circulation, it is characterized in that this liquid-cooled jacket has towards the downstream: the 1st stream; A plurality of the 2nd stream groups, described the 2nd stream group is made of a plurality of the 2nd streams; And the 3rd stream, above-mentioned heater mainly carries out heat exchange in above-mentioned the 2nd stream group, and adjacent above-mentioned the 2nd stream group is connected in series via connecting stream.

That is, above-mentioned the 2nd stream group has a plurality of the 2nd stream group portions, these a plurality of the 2nd stream group portion configured in series.

According to this liquid-cooled jacket, owing to possessing via connecting a plurality of the 2nd stream groups (the 2nd stream group portion) that stream is connected in series, thereby can between a plurality of the 2nd stream groups and heater, carry out heat exchange.

And above-mentioned liquid-cooled jacket is characterised in that adjacent above-mentioned the 2nd stream group is set up in parallel, and the downstream of one of them and another upstream extremity are in the same side.

That is, above-mentioned liquid-cooled jacket is that adjacent above-mentioned the 2nd stream group portion is set up in parallel, and the downstream of one of them and another upstream extremity are at the liquid-cooled jacket of the same side.

According to this liquid-cooled jacket, heat-exchange fluid by one in adjacent the 2nd stream group on the circulating direction of heat-exchange fluid, connect in stream, adjacent the 2nd stream group another, circulation agley.Therefore, under the situation that makes the constant dimension of liquid-cooled jacket when overlooking, if do not change the quantity of the 2nd stream that constitutes each the 2nd stream group, and increase the quantity of the 2nd stream group, the flow path cross sectional area that then constitutes each the 2nd stream of each the 2nd stream group diminishes.Thereby many if the quantity of the 2nd stream group becomes under the situation of the constant flow of the hot conveyance fluid that flows through liquid-cooled jacket, then the flow velocity of the hot conveyance fluid in each the 2nd stream becomes big.Thereby big from the heet transfer rate change of liquid-cooled jacket thermotropism conveyance fluid, consequently, the thermal resistance of liquid-cooled jacket descends.

Relative therewith, be not set up in parallel and for example be configured on its path direction under the situation of 1 row shape in the 2nd adjacent stream group, even the quantity of the 2nd stream group increases, the flow path length that also just constitutes each the 2nd stream of each the 2nd stream group shortens, its sectional area can not diminish, and it is big that the flow velocity of heat-exchange fluid can not become.Thereby the thermal resistance of liquid-cooled jacket can not descend.

And, be even number if make the quantity of the 2nd stream group, then the entrance and exit to the hot conveyance fluid of liquid-cooled jacket can be configured in the same side, consequently, fetch the pipe arrangement that is connected with liquid-cooled jacket and become easy.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has the tube bank that is formed by a plurality of metal pipe boundlings, and the hollow bulb of each pipe is above-mentioned the 2nd stream.

This liquid-cooled jacket is owing to having the tube bank that the metal pipe of boundling constitutes, thereby the hollow bulb of each pipe becomes the 2nd stream, can easily constitute liquid-cooled jacket.In addition, the radical of the metal pipe by suitably changing boundling, thickness etc. can easily change quantity, the thickness (flow path cross sectional area) of the 2nd stream.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket possesses the metal pipe with a plurality of hollow bulbs, and above-mentioned each hollow bulb is above-mentioned the 2nd stream.

According to this liquid-cooled jacket, use metal pipe with a plurality of hollow bulbs, can easily constitute liquid-cooled jacket.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has a plurality of metal fin of arranging with predetermined space, is above-mentioned the 2nd stream between the adjacent fin.

According to this liquid-cooled jacket, by with between the adjacent fin as the 2nd stream, thereby can pass to the hot conveyance fluid that in the 2nd stream, circulates via a plurality of fins from the heat of heater.

And this liquid-cooled jacket is characterised in that the width W of above-mentioned the 2nd stream is 0.2～1.0mm.

According to this liquid-cooled jacket, can make its thermal resistance and be in the good scope by the suffered pressure loss of the hot conveyance fluid of inside.

And this liquid-cooled jacket is characterised in that, the thickness T of the fin between the width W of above-mentioned the 2nd stream and adjacent above-mentioned the 2nd stream satisfies following formula (1):

—0.375×W+0.875≤T/W≤—1.875×W+3.275…(1)。

According to this liquid-cooled jacket, its thermal resistance diminishes, and can carry out heat exchange between heater and hot conveyance fluid well.

And this liquid-cooled jacket is characterised in that the depth D of above-mentioned the 2nd stream and width W satisfy following formula (2):

5×W+1≤D≤16.25×W+2.75…(2)。

According to this liquid-cooled jacket, its thermal resistance diminishes, and can carry out heat exchange between heater and hot conveyance fluid well.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has: fin component, this fin component constitute and comprise above-mentioned a plurality of metal fin and the upright soleplate that is provided with these a plurality of metal fins; And the cover main body of taking in this fin component, above-mentioned soleplate is fixed on the above-mentioned cover main body in the mode that can carry out heat exchange.

For this liquid-cooled jacket, for example can cut off by having as the base plate of soleplate and the upright metal extrudate that is located at a plurality of bars as fin on this base plate, making has the fin component of above-mentioned a plurality of metal fins, afterwards this fin component is fixed on the cover main body of case shape for example, constitutes liquid-cooled jacket.

And, for example also can make fin component by on metal, forming a plurality of grooves with a plurality of metal fins.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has: the 1st fin component, the 1st fin component have the 1st soleplate and upright a plurality of the 1st fins that are located on the 1st soleplate; And the 2nd fin component, the 2nd fin component has the 2nd soleplate and upright a plurality of the 2nd fins that are located on the 2nd soleplate, above-mentioned a plurality of the 1st fin and above-mentioned a plurality of the 2nd fin interlock, thereby above-mentioned the 1st fin component and above-mentioned the 2nd fin component combine, above-mentioned metal a plurality of fins are made of above-mentioned the 1st fin and above-mentioned the 2nd fin, form above-mentioned the 2nd stream between adjacent above-mentioned the 1st fin and above-mentioned the 2nd fin.

For this liquid-cooled jacket, owing to make a plurality of the 1st fins and a plurality of the 2nd fin interlock, even, also can dwindle the interval of the fin of adjacent metal system, the i.e. interval of the 1st fin and the 2nd fin so increase interval between the 1st fin and the interval between the 2nd fin.

And, this liquid-cooled jacket is characterised in that, above-mentioned heater is installed in above-mentioned the 1st soleplate side, and it is identical or be shorter than outstanding length, above-mentioned a plurality of the 2nd fins and above-mentioned the 1st soleplate hot link of above-mentioned the 2nd fin that the outstanding length of above-mentioned the 1st fin is set to outstanding length with above-mentioned the 2nd fin.

For this liquid-cooled jacket, because the outstanding length setting of the 1st fin is for identical with the outstanding length of the 2nd fin or be shorter than the outstanding length of the 2nd fin, thereby when combination the 1st fin component and the 2nd fin component, a plurality of the 2nd fins are connected on the 1st soleplate reliably, can engage a plurality of the 2nd fins and the 1st soleplate in the mode that can carry out heat exchange.

And then the heat that is installed in the heater of the 1st soleplate side passes to a plurality of the 1st fins and a plurality of the 2nd fin respectively via the 1st soleplate.Then, this heat can pass to the hot conveyance fluid that circulates in the 2nd stream between the 1st fin and the 2nd fin.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has: the cover main body, and it has the fin receiving room of taking in above-mentioned a plurality of metal fins; And the obturator that seals above-mentioned fin receiving room, the perisporium that surrounds the above-mentioned cover main body of above-mentioned fin receiving room is engaged by friction stir with the joint portion of above-mentioned obturator, and the initiating terminal that this friction stir engages is overlapping with the end end.

According to this liquid-cooled jacket, because the initiating terminal that friction stir engages is with to finish end overlapping, thus the perisporium of clutch collar main body and obturator well.Thus, hot conveyance fluid is difficult for leaking into the outside.

And, owing to do not use solder etc., and engage engaged closed body and cover main body by friction stir, thus can not pollute fully because of solder etc. makes hot conveyance fluid (cold-producing medium), and then the equipment class that constitutes the micropump of liquid cooling system and radiator etc. can not corroded because of solder etc. fully.

And this liquid-cooled jacket is characterised in that above-mentioned a plurality of metal fins are upright to be located on the above-mentioned obturator, and becomes-body with this obturator.

According to this liquid-cooled jacket,, thereby when sealing the fin receiving room, a plurality of metal fins can be configured on the precalculated position of fin receiving room with obturator because a plurality of metal fins and obturator become one.That is, can reduce the production process of liquid-cooled jacket, can easily produce, and can reduce its production cost.And for example the 5th execution mode is described like that as described later, revolves by the plate (sheet material) to aluminium alloy system and scrapes processing and obtain so parts that a plurality of metal fins and obturator are formed as one.

And, if scrape processing and wait by revolving like this, need not certainly fin to be engaged with obturator with solder etc. with fin and the integrally formed parts of obturator, thus, can prevent the pollution of hot conveyance fluid etc.

And then because fin and obturator are one, thereby heat transmitting between the two is higher.Thereby if heater such as CPU is installed on obturator, then the heat of heater just is delivered to a plurality of fins well via obturator.Consequently, the heat dispersion of heater in liquid-cooled jacket improves.

And this liquid-cooled jacket is characterised in that, anchor clamps be resisted against above-mentioned perisporium on one side carry out above-mentioned friction stir engage on one side, so that above-mentioned perisporium can not deform laterally.

According to this liquid-cooled jacket, Yi Bian perisporium on carry out friction stir joint by anchor clamps being resisted against on one side, thus make that perisporium is difficult for deforming laterally because of friction stir engages.And,,, also can not make the perisporium shifting ground carry out friction stir and engage against anchor clamps by like this even the distance (gap) between the outer peripheral face of the outer peripheral face of the shaft shoulder that perisporium is thin, friction stir engages employed instrument and perisporium for example is below the 2.0mm.

And this liquid-cooled jacket is characterised in that the length of the pin of the instrument that uses is below 60% of length of above-mentioned obturator in above-mentioned friction stir engages.

According to this liquid-cooled jacket, because the length of the pin of instrument is below 60% of length of obturator, thereby obturator is difficult for being out of shape to fin receiving room side because of friction stir engages.Thus, the volume that can prevent the fin receiving room diminishes.

And this liquid-cooled jacket is characterised in that in above-mentioned friction stir engaged, above-mentioned joint portion was left in the position of extracting of above-mentioned instrument.

According to this liquid-cooled jacket,, thereby can not form the vestige of selling of extracting in the joint portion because the joint portion is left in the position of extracting of instrument.Thus, suitably clutch collar main body and obturator.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has metal honeycomb ceramics, and this honeycomb ceramics has a plurality of pores, and above-mentioned pore is above-mentioned the 2nd stream.

According to this liquid-cooled jacket, by with the pore of honeycomb ceramics as the 2nd stream, thereby can make heat pass to the hot conveyance fluid that in the 2nd stream, circulates through honeycomb ceramics from heater.

And this liquid-cooled jacket is characterised in that this liquid-cooled jacket has: the cross section is wavy metal heat exchanging fin; With the metal cover main body that is fixed with this heat exchanging fin in the mode that can carry out heat exchange, between above-mentioned heat exchanging fin and above-mentioned cover main body, form above-mentioned the 2nd stream.

For this liquid-cooled jacket, by being that wavy heat exchanging fin is fixed on the cover main body in the mode that can carry out heat exchange with the cross section, thereby can easily constitute.

And this liquid-cooled jacket is characterised in that above-mentioned metal is aluminium or aluminium alloy.

According to this liquid-cooled jacket, be aluminium or aluminium alloy by making metal, can lightweight.

And this liquid-cooled jacket is characterised in that the outlet of the hot conveyance fluid that is taken into mouth and is communicated with above-mentioned the 3rd stream of the hot conveyance fluid that is communicated with above-mentioned the 1st stream is the center balanced configuration with above-mentioned heater.

According to this liquid-cooled jacket, be easy to circulate near heater the 2nd stream from being taken into hot conveyance fluid that confession is given to the 1st stream.Thus, can between hot conveyance fluid and heater, suitably carry out heat exchange.

And this liquid-cooled jacket is characterised in that, above-mentioned be taken into mouthful with above-mentioned outlet be configured to relative away from.

According to this liquid-cooled jacket, be easy to the integral body of a plurality of the 2nd streams, circulate from being taken into the hot conveyance fluid that confession is given to the 1st stream.Thus, suitably carry out heat exchange between hot conveyance fluid that can be in the integral body that circulates in a plurality of the 2nd streams and the heater.

And this liquid-cooled jacket is characterised in that the above-mentioned mouth that is taken into is configured near above-mentioned heater with above-mentioned outlet.

According to this liquid-cooled jacket, be easy to circulate near the 2nd stream of high flow velocities heater from being taken into the hot conveyance fluid that confession is given to the 1st stream.Thus, can between hot conveyance fluid that circulates with high flow velocities and heater, suitably carry out heat exchange.Promptly, for example heaters such as CPU not via the thermal diffusion sheet 102 (with reference to Fig. 3) that is called as radiator (heat spreader) be installed on the liquid-cooled jacket, the heat of heater is difficult to pass under the situation of liquid-cooled jacket integral body, by making hot conveyance fluid circulating near the 2nd stream of higher flow velocity heater like this, thereby can make its heat radiation effectively.

And this liquid-cooled jacket is characterised in that above-mentioned heater is CPU.

According to this liquid-cooled jacket, can between CPU and hot conveyance fluid, carry out heat exchange effectively, cooling CPU.

According to the present invention, can provide a kind of liquid-cooled jacket that can cool off heaters such as CPU effectively.And, each side of the present invention and effect and other effects and further illustrative the and detailed description unrestriced execution mode of the present invention of describing in the back by the reference accompanying drawing of feature will become clearer.

Description of drawings

Fig. 1 is the structure chart of the liquid cooling system of the 1st execution mode.

Fig. 2 is the overall perspective view of the liquid-cooled jacket of the 1st execution mode.

Fig. 3 is the overall perspective view from beneath of the liquid-cooled jacket of the 1st execution mode.

Fig. 4 is the stereogram of the liquid-cooled jacket of the 1st execution mode, and the state of cap unit has been omitted in expression.

Fig. 5 is the vertical view of the liquid-cooled jacket of the 1st execution mode.

Fig. 6 is the X-X profile of the liquid-cooled jacket of the 1st execution mode shown in Figure 2.

Fig. 7 is the exploded perspective view of the liquid-cooled jacket of the 1st execution mode.

Fig. 8 is the curve chart of effect of schematically representing the liquid-cooled jacket of the 1st execution mode.

Fig. 9 is the overall perspective view of the liquid-cooled jacket of the 2nd execution mode, and the state of cap unit has been omitted in expression.

Figure 10 is the Y-Y profile of the liquid-cooled jacket of the 2nd execution mode shown in Figure 9.

Figure 11 is the overall perspective view of the liquid-cooled jacket of the 3rd execution mode.

Figure 12 is the vertical view of the liquid-cooled jacket of the 3rd execution mode.

Figure 13 is the overall perspective view of the liquid-cooled jacket of the 4th execution mode, and the state of cap unit has been omitted in expression.

Figure 14 is the Z-Z profile of the liquid-cooled jacket of the 4th execution mode shown in Figure 13.

Figure 15 is the enlarged drawing of Z-Z profile shown in Figure 14.

Figure 16 is the stereogram of the 1st manufacture method of fin component of the liquid-cooled jacket of expression the 4th execution mode, before (a) expression is cut off, after (b) expression is cut off.

Figure 17 is the stereogram of the 2nd manufacture method of fin component of the liquid-cooled jacket of expression the 4th execution mode, before (a) expression is cut off, after (b) expression is cut off.

Figure 18 is the stereogram that the friction stir of expression the 4th execution mode engages.

Figure 19 is the profile that the friction stir of expression the 4th execution mode engages.

Figure 20 is the vertical view of the action of the instrument during the friction stir of expression the 4th execution mode engages.

Figure 21 is the profile of the liquid-cooled jacket of the 5th execution mode.

Figure 22 is the enlarged drawing of profile shown in Figure 21.

Figure 23 is the figure of manufacture method of fin component of the liquid-cooled jacket of expression the 5th execution mode, and (a) expression is being revolved and scraped processing, after (b) expression is revolved and scraped processing.

Figure 24 is the figure of manufacture method of fin component of the liquid-cooled jacket of expression the 5th execution mode, and revolving after the part of scraping fin shown in Figure 23 (b) removed in expression.

Figure 25 is the profile that the friction stir of expression the 5th execution mode engages.

Figure 26 is the profile of the liquid-cooled jacket of the 6th execution mode, (a) after the expression assembling, (b) before the expression assembling.

Figure 27 is the profile of the liquid-cooled jacket of the 7th execution mode, (a) after the expression assembling, (b) before the expression assembling.

Figure 28 is the profile of the liquid-cooled jacket of the 8th execution mode, (a) after the expression assembling, (b) before the expression assembling.

Figure 29 is the vertical view of the liquid-cooled jacket of the 9th execution mode.

Figure 30 is the vertical view of the liquid-cooled jacket of the 10th execution mode.

Figure 31 is the turn back curve chart of number and the relation of thermal resistance of expression.

Figure 32 is the profile of the flat tube bank of variation.

Figure 33 is the profile of the liquid-cooled jacket of variation, (a) after the expression assembling, (b) before the expression assembling.

Figure 34 is the profile of the liquid-cooled jacket of variation.

Figure 35 is the stereogram of the liquid-cooled jacket of variation.

Figure 36 is the curve chart of the relation of expression well width W1 and the thermal resistance and the pressure loss.

Figure 37 is the curve chart of the relation of expression thickness T 1/ well width W1 of fin and thermal resistance.

Figure 38 is the curve chart of relation of the thickness T 1/ well width W1 of expression well width W1 and fin.

Figure 39 is the curve chart of depth D 1 with the relation of thermal resistance of expression groove.

Figure 40 is the curve chart of relation of the depth D 1 of expression well width W1 and groove.

Symbol description

A1: the 1st stream; B1: the 2nd stream group; B1a: the 2nd stream; C1: the 3rd stream; J1: liquid-cooled jacket; 10: the cover main body; 10a: space; 10c: space; 11: diapire; 12: perisporium; 15: end difference; 20: flat tube bank; 21: flat tube; 21a: hollow bulb; 21b: perisporium; 21c: partition wall; 31: the lid main body; 31a: be taken into mouth; 31b: outlet; 101:CPU (heater); 200: instrument; 201: pin; 202: the shaft shoulder; 210: anchor clamps; K: friction stir junction surface; L5: the length of pin; L6: the distance of the outer peripheral face of instrument and the outer peripheral face of perisporium; P1: joint portion; Q: lap; T1: the thickness of fin; T2: the thickness of lid main body; T11: the thickness of perisporium; W1: well width; W11: the width of end difference.

Embodiment

Below, the execution mode that suitably present invention will be described in detail with reference to the accompanying.

" the 1st execution mode "

The liquid cooling system and the liquid-cooled jacket of the 1st execution mode at first, are described referring to figs. 1 through Fig. 8.Fig. 1 is the structure chart of the liquid cooling system of the 1st execution mode.Fig. 2 is the overall perspective view of the liquid-cooled jacket of the 1st execution mode.Fig. 3 is the overall perspective view from beneath of the liquid-cooled jacket of the 1st execution mode.Fig. 4 is the stereogram of the liquid-cooled jacket of the 1st execution mode, and the state of cap unit has been omitted in expression.Fig. 5 is the vertical view of the liquid-cooled jacket of the 1st execution mode, has omitted to be taken into pipe and discharge pipe.Fig. 6 is the X-X profile of the liquid-cooled jacket of the 1st execution mode shown in Figure 2.Fig. 7 is the exploded perspective view of the liquid-cooled jacket of the 1st execution mode.Fig. 8 is the curve chart of effect of schematically representing the liquid-cooled jacket of the 1st execution mode.

" structure of liquid cooling system "

As shown in Figure 1, the liquid cooling system S1 of the 1st execution mode is the system of carrying on the personal computer main body 120 (electronic equipment) of turriform personal computer, is the system that the CPU 101 (heater) that constitutes personal computer main body 120 is cooled off.Liquid cooling system S1 mainly possesses: the liquid-cooled jacket J1 (with reference to Fig. 3) that CPU 101 is installed on the precalculated position; The heat that cooling water (hot conveyance fluid) is carried is released to outside radiator 121 (heat-sink unit); Make the micropump 122 (hot conveyance fluid feed unit) of cooling water circulation; The water storage tank 123 of the expansion of the cooling water that absorption is caused by variations in temperature; The flexible pipe 124 that connects them And the cooling water of carrying heat.The anti-icing fluid that for example makes spent glycol system is as cooling water.

And then when micropump 122 work, cooling water circulates in these equipment.

" structure of liquid-cooled jacket "

Below, describe the liquid-cooled jacket J1 that constitutes liquid cooling system S1 in detail.

As Fig. 2, shown in Figure 3, across thermal diffusion sheet 102 (heat spreader) CPU 101 is installed in the central authorities (precalculated position) of the lower side (rear side) of liquid-cooled jacket J1.By installing like this under the state of CPU 101, cooling water circulates in liquid-cooled jacket J1, thereby liquid-cooled jacket J1 accepts the heat by CPU 101 generations, simultaneously carry out heat exchange with cooling water at internal circulation, to pass to cooling water from the heat that CPU 101 receives thus, consequently, CPU 101 is cooled effectively.In addition, thermal diffusion sheet 102 is the sheets that are used for the heat of CPU 101 is passed to effectively the diapire 11 of cover main body 10 described later, and for example the metal that has a high-termal conductivity by copper etc. forms.

To shown in Figure 7, this liquid-cooled jacket J1 mainly has cover main body 10, flat tube bank 20 (tube bank) and cap unit 30 as Fig. 4.Cover main body 10, flat tube bank 20 and cap unit 30 short of special descriptions are just formed by aluminium or aluminium alloy.Thus, can realize the lightweight of liquid-cooled jacket J1, easily operation.

＜cover main body 〉

Cover main body 10 is the casings (with reference to Fig. 7) at the shallow end of upper side (side) opening, has diapire 11 and perisporium 12, has the receiving room (with reference to Fig. 7) of taking in flat tube bank 20 in the inboard of this cover main body 10.This cover main body 10 is for example by making such as die casting (die casting), casting, forgings.And cover main body 10 has the shape contraposition part corresponding with the notch 31c of lid main body 31 described later 14 on the part of its opening edge.

＜flat tube bank 〉

Flat tube bank 20 is in cover main body 10, guarantee space 10a and space 10c (with reference to Fig. 4, Fig. 5) in its both end sides, and by the solder that constitutes by aluminium alloys such as Al-Si-Zn systems etc., engage/be fixed in the mode that can carry out heat exchange (heat moves) on the diapire 11 of cover main body 10 (with reference to Fig. 6).Space 10a plays a role as the 1st stream A1, and space 10c plays a role as the 3rd stream C1.

Flat tube bank 20 is boundlings and engage and to have the flat tube 21 of predetermined radical to form (with reference to Fig. 6, Fig. 7) on its thickness direction.Each flat tube 21 has one or more (in the 1st execution mode being 2) hollow bulb 21a.And then each hollow bulb 21a plays a role as cooling the 2nd stream B1a that but current are logical.Promptly, the cross section of each the 2nd stream B1a is a rectangle, and described each the 2nd stream B1a is positioned at being surrounded by the perisporium 21b of flat tube 21, the side wall portion that 21b constitutes (the 2nd stream formation portion) and the upper wall portions (the 2nd stream formation portion) or the lower wall portion (the 2nd stream formation portion) that are made of perisporium 21b or partition wall 21c that are positioned at its upper and lower sides of its both sides.Therefore, flat tube bank 20 has a plurality of the 2nd stream B1a,, has the 2nd stream group B1 that is made of a plurality of the 2nd stream B1a that is.

Herein, as mentioned above, CPU 101 is installed in the substantial middle position (with reference to Fig. 3) of the downside (outside) of diapire 11.Thus, the heat of CPU 101 passes to the partition wall 21c of the hollow bulb 21a of the perisporium 21b of the hollow bulb 21a (the 2nd stream B1a) that surrounds each flat tube 21 and separating adjacent via diapire 11.And then the heat that passes to perisporium 21b and partition wall 21c (heat exchange department) is delivered to the cooling water that circulates in each the 2nd stream B1a.Like this, CPU 101 main cooling waters with circulation in the 2nd stream group B1 part carry out heat exchange.

And, constitute flat tube bank 20 by many flat tubes of boundling 21, directly carry out perisporium 21b (heat exchange department) increase of heat exchange thereby transmit, so can between CPU 101 and cooling water, carry out heat exchange effectively from the heat of CPU 101 and with cooling water.Thus, can cool off CPU 101 effectively.

[the 1st stream, the 2nd stream group (a plurality of the 2nd stream), the 3rd stream]

Further specify the 1st stream A1, the 2nd stream group B1 (a plurality of the 2nd stream B1a), the 3rd stream C1 herein.

The 1st stream A1 is a stream of supplying with cooling water from micropump 122, and it is configured in micropump 122 sides (more leaning on the position of upstream side than the 2nd stream group B1).

The 2nd stream group B1 is configured in the downstream of the 1st stream A1, and each the 2nd stream B1a that constitutes the 2nd stream group B1 is from the 1st stream A1 branch.Thus, cooling water distributes from the 1st stream A1, flows into each the 2nd stream B1a.

The 3rd stream C1 is configured in the 2nd stream group B1, is the downstream of a plurality of the 2nd stream B1a, makes a plurality of the 2nd stream B1a set.Thus, the cooling water that flows out from each the 2nd stream B1a is discharged to the outside of liquid-cooled jacket J1 after the 3rd stream C1 set.

The flow path cross sectional area of the 1st stream A1 and the 3rd stream C1 is set to the flow path cross sectional area greater than each the 2nd stream B1a.With respect to 1 crooked stream via all parts suitable with flat tube bank 20 that prior art relates to, the flow path length (length of each flat tube 21) of each the 2nd stream B1a is extremely short.

Therefore, the suffered pressure loss of cooling water according to the 1st stream A1, the respectively order circulation of the 2nd stream B1a, the 3rd stream C1 produces in the 1st stream A1 and the 3rd stream C1 hardly, and the pressure loss in each the 2nd stream B1a is with respect to also minimum from the suffered pressure loss of 1 stream of above-mentioned bending.Thus, can reduce specified output from the micropump 122 of cooling water to liquid-cooled jacket J1 that supply with, can make micropump 122 miniaturizations and reduce its noise.

＜cap unit 〉

As shown in Figure 7, cap unit 30 mainly has the main body of lid 31, is taken into pipe 32 and discharge pipe 33.

[lid main body]

Lid main body 31 engages/is fixed on the cover main body 10 in the mode that covers the cover main body 10 of taking in flat tube bank 20.On lid main body 31, be formed with the outlet 31b (with reference to Fig. 7) that is taken into mouthful 31a and is communicated with that is communicated with the 1st stream A1 (space 10a) with the 3rd stream C1 (space 10c).

And lid main body 31 has cuts the notch 31c that forms, and the shape of notch 31c is consistent with the contraposition part 14 of cover main body 10.Thus, lid main body 31 (cap unit 30) only predetermined towards on cooperate with cover main body 10.

(being taken into mouth, outlet)

As shown in Figure 5, being taken into mouthful 31a and outlet 31b is central point configuration with CPU 101 when overlooking, and is configured to leave relatively.In other words, be taken into a mouthful 31a, outlet 31b, CPU 101 is configured on the diagonal that is foursquare liquid-cooled jacket J1 when overlooking.If further specify, then be taken into mouthful 31a and be configured in upper left side among Fig. 5, on the other hand, outlet 31b is configured in the lower right side among Fig. 5, and CPU 101 is configured in the roughly centre position (approximate centre that is foursquare liquid-cooled jacket J1) that is taken into mouthful 31a and outlet 31b.

Therefore, roughly supply to whole the 2nd stream group B1 (integral body of a plurality of the 2nd stream B1a) from the cooling water that is taken into pipe 32 equably via being taken into a mouthful 31a, the 1st stream A1.And then, between the integral body of the cooling water that circulates in whole the 2nd stream group B1 and CPU 101, carry out heat exchange effectively.

Then, the cooling water that flows out from a plurality of the 2nd stream B1a is discharged to the outside of liquid-cooled jacket J1 through outlet 31b, discharge pipe 33 after the 3rd stream C1 set.

[being taken into pipe, discharge pipe]

Being taken into pipe 32 is fixed on and covers on the main body 31.Be connected with flexible pipe 124 on 32 being taken into pipe, this flexible pipe 124 is communicated to the micropump 122 (with reference to Fig. 1) of the upstream side of liquid-cooled jacket J1.And then, from the cooling water of micropump 122 via the hollow bulb that is taken into pipe 32 be taken into a mouthful 31a and supply to the 1st stream A1.

Discharge pipe 33 is fixed on and covers on the main body 31.Be connected with flexible pipe 124 at discharge pipe 33, this flexible pipe 124 is communicated to the radiator 121 (with reference to Fig. 1) in the downstream of liquid-cooled jacket J1.And then, be discharged to the outside of liquid-cooled jacket J1 via the hollow bulb of outlet 31b and discharge pipe 33 at the cooling water of the 3rd stream C1 set.

Being taken into pipe 32 and discharge pipe 33 establishes state and is fixed on the upper surface side of covering main body 31 with upright.Thus, only can flexible pipe 124,124 be connected to and be taken on pipe 32, the discharge pipe 33 from the upper surface side of liquid-cooled jacket J1.That is, in the personal computer main body 120 of limited space (with reference to Fig. 1), fetch the flexible pipe 124,124 (with reference to Fig. 1) that is connected with liquid-cooled jacket J1 easily.

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J1 is described.

When connecting the power supply of personal computer main body 120 (Fig. 1), CPU 101 work begin heating.Then, the heat of CPU 101 is delivered to the diapire 11 of cover main body 10 via thermal diffusion sheet 102, and then mainly is delivered to the perisporium 21b and the partition wall 21c of each flat tube 21 that constitutes flat tube bank 20.

On the other hand, with the connection interlock of the power supply of personal computer main body 120, micropump 122 work, cooling water circulates.So in liquid-cooled jacket J1, cooling water is according to the order circulation of the 1st stream A1, the 2nd stream group B1 (a plurality of the 2nd stream B1a), the 3rd stream C1.

Then, at the perisporium 21b and the partition wall 21c of each flat tube 21 and circulate between the cooling water of each the 2nd stream B1a and carry out heat exchange, cooling water is arrived in the heat transmission (moving) that is delivered to the CPU 101 of perisporium 21b and partition wall 21c, and cooling water is heated.

Then, after the 3rd stream C1 set, be discharged to the outside of liquid-cooled jacket J1 at cooling water that each the 2nd stream B1a is heated via outlet 31b, discharge pipe 33.The cooling water that is discharged from is fed into radiator 121 after by flexible pipe 124, and the heat of cooling water is distributed in radiator 121.And then the cooling water that temperature reduces flows into micropump 122 through water storage tank 123, flexible pipe 124, supplies to liquid-cooled jacket J1 afterwards once more.

By carry out continuously this (1) from CPU 101 to the transmission of the heat of the perisporium 21b of thermal diffusion sheet 102, diapire 11, each flat tube 21 and partition wall 21c, (2) from perisporium 21b and partition wall 21c to the transmission of the heat of cooling water and the heat radiation of the cooling water (3) radiator 121, thereby cool off CPU 101 effectively.

In addition, the heat of CPU 101 disperses to pass to the perisporium 21b and the partition wall 21c of a plurality of flat tubes 21, and the heat of this each perisporium 21b and partition wall 21c is delivered to the cooling water that circulates in each the 2nd stream B1a, therefore can cool off CPU 101 effectively.

And then, the cooling water that supplies to liquid-cooled jacket J1 is in liquid-cooled jacket J1, via the 1st big stream A1 of flow path cross sectional area, flow through short and a plurality of the 2nd stream B1a (the 2nd stream group B1) that mainly carry out heat exchange of flow path length afterwards, discharge in the 3rd stream C1 set back that flow path cross sectional area is big, so the pressure loss that cooling water is subjected in liquid-cooled jacket J1 diminishes.Thus, can make micropump 122 miniaturizations, thereby the range of application of liquid cooling system S1 broadens.

And then, according to this liquid-cooled jacket J1 (product of the present invention), as shown in Figure 8, comparing with existing liquid-cooled jacket (existing product) with the 2nd stream of 1 long bending, liquid-cooled jacket J1 of the present invention can make the cooling water circulation with the low pressure loss and high flow.Promptly, as shown in Figure 8 as can be known, intersection point M1 with respect to the flow curve of the pressure loss-flow curve of 1 micropump and existing product, the intersection point M2 of the flow curve of the above-mentioned pressure loss-flow curve and product of the present invention is shifted to the lower right side, according to liquid-cooled jacket J1 (product of the present invention), the pressure loss is little and flow is high.

" manufacture method of liquid-cooled jacket "

Below, main making (manufacturing) method that liquid-cooled jacket J1 is described with reference to Fig. 7.The manufacture method of liquid-cooled jacket J1 mainly comprises the 1st operation of making flat tube bank 20 and flat tube bank 20 is engaged/be fixed on the 2nd operation on the cover main body 10.

＜the 1 operation 〉

With many flat tubes 21 while using suitable means to engage boundling.Then, the two ends of the parts that cut-out/grinding boundling forms make its alignment, make flat tube bank 20.

＜the 2 operation 〉

By suitable means solder and flux such as () Al-Si-Zn flat tube bank 20 is engaged/is fixed in the mode that can carry out heat exchange on the precalculated position of diapire 11 of cover main body 10.In addition, in the time of on flat tube bank 20 being fixed on cover main body 10, guarantee above-mentioned space 10a (the 1st stream A1), space 10c (the 3rd stream C1) in the both end sides of flat tube bank 20.

Afterwards, by suitable means will be fixed with on the precalculated position be taken into pipe 32, the lid main body 31 of discharge pipe 33 engages/is fixed on the cover main body 10.Like this, can obtain liquid-cooled jacket J1.

And, also can will cover after main body 31 is fixed on the cover main body 10, will be taken into pipe 32, discharge pipe 33 is fixed on and covers on the main body 31.

Like this, according to the manufacture method of the liquid-cooled jacket J1 of the 1st execution mode, by a plurality of flat tubes 21 being formed flat tube bank 20, should flat tube bank 20 being fixed on the cover main body 10 and fixed cap main body 31 so simple operations obtain liquid-cooled jacket J1.

" the 2nd execution mode "

Below, the liquid-cooled jacket of the 2nd execution mode is described with reference to Fig. 9, Figure 10.Fig. 9 is the overall perspective view of the liquid-cooled jacket of the 2nd execution mode, and the state of cap unit has been omitted in expression.Figure 10 is the Y-Y profile of the liquid-cooled jacket of the 2nd execution mode shown in Figure 9.

As Fig. 9, shown in Figure 10, the liquid-cooled jacket J2 of the 2nd execution mode is characterised in that, replaces the flat tube bank 20 of the liquid-cooled jacket J1 of the 1st execution mode, has flat tube bank 23.Though flat tube bank 23 overall dimensions are identical with the flat tube bank 20 of the 1st execution mode, it carries out boundling and constitutes by a plurality of (among Fig. 9, Figure 10 being 3) laminal flat tube 24 is piled up.Each flat tube 24 portion within it has a plurality of (among Fig. 9, Figure 10 being 12) hollow bulb 24a, and each hollow bulb 24a becomes the 2nd stream B2a.Consequently, flat tube bank 23 has the 2nd stream group B2 that is made of a plurality of the 2nd stream B2a.

Herein, each flat tube 24 is owing to be lamellar, so the quantity (2) of the quantity (among Fig. 9 being 12) that is formed at its inner hollow bulb 24a hollow bulb 21a interior than the flat tube 21 that is formed on the 1st execution mode is many.Thus, the quantity (3) that constitutes the flat tube 24 of flat tube bank 23 is lacked than the quantity (with reference to Fig. 7, being 20) of the flat tube 21 of the flat tube bank 20 that constitutes the 1st execution mode.That is, the flat tube bank 23 of the 2nd execution mode can reduce the quantity of the flat tube 24 of boundling (overlapping) with respect to the flat tube bank 20 of the 1st execution mode, can be without difficulty and constitute simply.

" the 3rd execution mode "

Below, the liquid-cooled jacket of the 3rd execution mode is described with reference to Figure 11, Figure 12.Figure 11 is the overall perspective view of the liquid-cooled jacket of the 3rd execution mode.Figure 12 is the vertical view of the liquid-cooled jacket of the 3rd execution mode.

" structure of liquid-cooled jacket "

As Figure 11, shown in Figure 12, the liquid-cooled jacket J3 of the 3rd execution mode compares with the liquid-cooled jacket J1 of the 1st execution mode, has to be taken into mouthful 34a and outlet 34b and to be formed on lid main body 34 on the diverse location.

Be taken into mouthful 34a and be communicated with the substantial middle position of space 10a (the 1st stream A1), cooling water is fed into the substantial middle position of space 10a.Outlet 34b is communicated with the substantial middle position of space 10c (the 3rd stream), and cooling water is discharged from this substantial middle position.Being taken into mouthful 34a and outlet 34b when overlooking, is the center balanced configuration with CPU 101, and is configured on the position near CPU101.

And lid main body 34 is also same with the lid main body 31 of the 1st execution mode, has the shape notch 34c corresponding with the contraposition part 14 that overlaps main body 10.

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J3 is described simply.

Be taken into mouthful 34a and outlet 34b and be configured on the position near CPU 101 by constituting, thereby, be easy to preferential flow and lead near the CPU 101 the 2nd stream B1a from being taken into cooling water that mouthful 34a supplies to the 1st stream A1 (space 10a).Thus, can between cooling water and CPU 101, suitably carry out heat exchange, can cool off CPU 101 effectively.

" the 4th execution mode "

Below, the liquid-cooled jacket of the 4th execution mode is described with reference to Figure 13 to Figure 20.Figure 13 is the overall perspective view of the liquid-cooled jacket of the 4th execution mode, and the state of cap unit has been omitted in expression.Figure 14 is the Z-Z profile of the liquid-cooled jacket of the 4th execution mode shown in Figure 13.Figure 15 is the enlarged drawing of Z-Z profile shown in Figure 14.Figure 16 is the stereogram of the 1st manufacture method of fin component of the liquid-cooled jacket of expression the 4th execution mode, before (a) expression is cut off, after (b) expression is cut off.Figure 17 is the stereogram of the 2nd manufacture method of fin component of the liquid-cooled jacket of expression the 4th execution mode, before (a) expression is cut off, after (b) expression is cut off.Figure 18 is the stereogram that the friction stir of expression the 4th execution mode engages.Figure 19 is the profile that the friction stir of expression the 4th execution mode engages.Figure 20 is the vertical view of the action of the instrument during the friction stir of expression the 4th execution mode engages.

" structure of liquid-cooled jacket "

As Figure 13, shown in Figure 14, the liquid-cooled jacket J4 of the 4th execution mode is characterised in that, replaces the flat tube bank 20 of the liquid-cooled jacket J1 of the 1st execution mode, has the fin component 25 of aluminium or aluminium alloy system.

In addition, the cover main body 10 of the 4th execution mode side within it has the fin receiving room of taking in fin component 25, and this fin receiving room is surrounded by perisporium 12.And fin component 25 solderings are fixed on the diapire 11, be accommodated in simultaneously in the fin receiving room, by with the lid main body 31 (obturator) cover the cover main body 10 opening, thereby the fin receiving room is closed (with reference to Figure 14).

＜fin component 〉

As shown in figure 14, fin component 25 has soleplate 25a and the upright a plurality of fin 25b that are located on this soleplate 25a.Soleplate 25a engages/is fixed on the diapire 11 of cover main body 10 in the mode that can carry out heat exchange.Therefore, the heat of CPU 101 passes to each fin 25b via thermal diffusion sheet 102, diapire 11.In addition, the upper front end of each fin 25b is connected to the back side of covering main body 31.And preferred soleplate 25a and cover main body 10 engage in the mode that can carry out heat exchange reliably by the solder that is made of aluminium alloys such as Al-Si-Zn systems.

And, become the 2nd stream B3a between adjacent fin 25b, the 25b respectively.That is to say that fin component 25 has a plurality of the 2nd stream B3a, promptly have the 2nd stream group B3 that constitutes by a plurality of the 2nd stream B3a.

As shown in figure 15, the distance of adjacent fin 25b, 25b, promptly the well width W1 as the width of the 2nd stream B3a is designed to 0.2～1.1mm.Thus, as illustrating among the embodiment described later, the thermal resistance of liquid-cooled jacket J4 with all be in the good range by the suffered pressure loss of its inner cooling water.

In addition, the thickness T 1 of well width W1 and fin 25b, promptly and the relation of the formula (1) of the thickness T 1 of the fin 25b between adjacent the 2nd stream B3a, B3a below satisfying.Thus, the thermal resistance of liquid-cooled jacket J4 diminishes, and can carry out heat exchange between CPU 101 and cooling water well.

—0.375×W1+0.875≤T1/W1≤—1.875×W1+3.275…(1)

And then, the relation of the formula (2) below well width W1 and depth D 1 (degree of depth of the 2nd stream B3a) satisfy.Thus, can make the thermal resistance of liquid-cooled jacket J4 for best.

5×W1+1≤D1≤16.25×W1+2.75…(2)

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J4 is described simply.

Cooling water is according to the order circulation of the 1st stream A1, the 2nd stream group B3 (a plurality of the 2nd stream B3a), the 3rd stream C1.And, mainly between the cooling water that circulates in the 2nd stream group B3 and a plurality of fin 25b, carry out heat exchange.Consequently, can cool off CPU 101 effectively.

" manufacture method of the fin component of liquid-cooled jacket "

Below, illustrate making (manufacturing) method of the fin component 25 of liquid-cooled jacket J4.

The 1st manufacture method of＜fin component 〉

The 1st manufacture method of fin component 25 at first, is described with reference to Figure 16.

Shown in Figure 16 (a), use the predetermined metal extrudate 41 of Mold Making, this extrudate 41 has base plate 42 and upright a plurality of 43 of being located on the base plate 42.Then, by cutting off extrudate 41, thereby can produce the fin component 25 (with reference to Figure 16 (b)) of have soleplate 25a (part of base plate 42) and a plurality of fin 25b (parts of a plurality of 43) at predetermined section.

The 2nd manufacture method of＜fin component 〉

Below, the 2nd manufacture method of fin component 25 is described with reference to Figure 17.

Shown in Figure 17 (a), use suitable cutting tools, on metal piece 44 corresponding of size, form a plurality of groove 44a with the profile of fin component 25.So, can produce fin component 25 (with reference to Figure 17 (b)) with soleplate 25a and a plurality of fin 25b.

" assembling of liquid-cooled jacket "

Next, main with reference in the assembling of Figure 18 to Figure 20 to liquid-cooled jacket J4, the cover main body 10 that is fixed with fin component 25 engages with the friction stir of cap unit 30 and describes.

As shown in figure 18, be fixed with in soldering on the cover main body 10 of fin component 25, Yi Bian notch 31c is aimed at contraposition part 14, Yi Bian the unit 30 that closes the lid.And as shown in figure 19, it is poor that the opening edge of cover main body 10 has ladder, covers main body 31 on the end difference 15 of low one-level.In order to ensure the volume of the 1st stream A1 that flows through cooling water and the 3rd stream C1 etc., the width W 11 of end difference 15 is set smallerly as far as possible, particularly, is preferably set to about 0.1～0.5mm.

Then, the 200 pairs of perisporiums 12 of instrument that use friction stir to engage usefulness carry out friction stir with the joint portion P1 that covers main body 31 and engage.So, forming friction stir junction surface K (with reference to Figure 15) at the rear of instrument 200, perisporium 12 is engaged with lid main body 31.Herein, the length L 5 of the pin 201 of instrument 200 is preferably formed to being engaged below 60% of thickness T 2 that parts promptly cover main body 31.By making it form below 60% of thickness T 2 that covers main body 31 like this, though thereby also depend on the material of covering main body 31, even but the width W 11 of above-mentioned end difference 15 is less, can make that also joint portion P1 is difficult to deform in the inboard of cover main body 10 by the pressing force of instrument 200.

In addition, instrument 200 is controlled by lathes such as NC (not shown), when instrument 200 carries out rotation, moves (with reference to Figure 18) along joint portion P1.

And, when carrying out the friction stir joint, suitable anchor clamps 21 are resisted against on the side face of the perisporium 12 that overlaps main body 10.Thus, even perisporium 12 is thin, the outer peripheral face of the shaft shoulder (shoulder) 202 of instrument 200 for example is below the 2.0mm with the distance L 6 (gap) of the outer peripheral face of perisporium 12, can make also that perisporium 12 is difficult by the pressing force of instrument 200 to deform laterally.

In addition, under the thin situation of this perisporium 12,,, make about the surface decline 1.0～2.0mm of anchor clamps 210 preferably with respect to the surface of joint portion P1 for fear of contacting of instrument 200 and anchor clamps 210.

And then, as shown in figure 20, make instrument 200 actions with friction stir initiating terminal that engages and the mode that finishes end overlapping (reference marks Q).Thus, cover main body 10 can engage with lid main body 31 very close to each otherly, thereby cooling water is difficult for leaking into the outside.Then, unload instrument 200, extract pin 201 from joint portion P1.Thus, can on the P1 of joint portion, not form the vestige of extracting of pin 201.

" the 5th execution mode "

Below, the liquid-cooled jacket of the 5th execution mode is described with reference to Figure 21 to Figure 25.Figure 21 is the profile of the liquid-cooled jacket of the 5th execution mode.Figure 22 is the enlarged drawing of profile shown in Figure 21.Figure 23 is the figure of manufacture method of fin component of the liquid-cooled jacket of expression the 5th execution mode, and (a) expression is being revolved and scraped processing, after (b) expression is revolved and scraped processing.Figure 24 is the figure of manufacture method of fin component of the liquid-cooled jacket of expression the 5th execution mode, and revolving after the part of scraping fin shown in Figure 23 (b) removed in expression.Figure 25 is the profile that the friction stir of expression the 5th execution mode engages.

In addition, the part different with the liquid-cooled jacket J4 of the 4th execution mode is described.

" structure of liquid-cooled jacket "

As shown in figure 21, the liquid-cooled jacket J5 of the 5th execution mode mainly has the fin component 29 of cover main body 10C and aluminium or aluminium alloy system, and its diapire 29a (obturator) that constitutes at fin component 29 goes up CPU 101 is installed.

Cover main body 10C is in the open lower side of Figure 21 and has the slim casing of fin receiving room in inside.

As described later, fin component 29 is that 1 plate 61 is revolved the parts (with reference to Figure 23 (a)) of scraping the processing gained, and it has diapire 29a and a plurality of metal fin 29b.A plurality of fin 29b are upright to be located on the diapire 29a, and 29a constitutes one with diapire.Thus, heat is transmitted between diapire 29a and fin 29b well.

And diapire 29a plays a role as the obturator that above-mentioned fin receiving room is sealed.In addition, between adjacent fin 29b, the 29b as the 2nd stream B4a play a role (with reference to Figure 22).And then liquid-cooled jacket J5 has the 2nd stream group B4 that is made of a plurality of the 2nd stream B4a.And, be installed under the state that overlaps on the main body 10C at fin component 29, same with the 4th execution mode, in liquid-cooled jacket J5, form the 1st stream A1 and the 3rd stream C1 (with reference to Figure 13).

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J5 is described simply.

Cooling water is according to the order circulation of the 1st stream A1 (with reference to Figure 13), the 2nd stream group B4 (a plurality of the 2nd stream B4a), the 3rd stream C1 (with reference to Figure 13).And then, mainly between the cooling water that circulates in the 2nd stream group B4 and a plurality of fin 25b, carry out heat exchange, can cool off CPU 101 effectively.Herein, because diapire 29a and fin 29b constitute one,, consequently, can dispel the heat well so the heat energy of CPU 101 is delivered to a plurality of fin 29b enough well.

" manufacture method of the fin component of liquid-cooled jacket "

Then, with reference to Figure 23 and Figure 24 making (manufacturing) method of having used the fin component 29 that revolves the liquid-cooled jacket J5 that scrapes processing is described.

Shown in Figure 23 (a), tabular plate 61 is carried out revolving described in TOHKEMY 2001-326308 communique and the TOHKEMY 2001-352020 communique etc. scrape processing.Specifically, cutting tools 62 is acute angle incision plate 61, a part of having cut plate 61 forms a plurality of revolving and scrapes fin 63.Repeat repeatedly this action, make and to have a plurality of revolving and scrape revolving of fin 63 and scrape intermediate 64 (with reference to Figure 23 (b)).By the way, the part of not cut of plate 61 becomes the diapire 29a (obturator) of fin component 29.

Then, when assembling formation liquid-cooled jacket J5,, remove a plurality of outer circumferential side parts of scraping fin 63 of revolving with cutting tools in liquid-cooled jacket J5, to form the mode of the 1st stream A1 and the 3rd stream C1 with cover main body 10C.So, as shown in figure 24, can obtain to have diapire 29a and the upright integratedly fin component 29 that is located at a plurality of fin 29b on this diapire 29a.

But, the manufacture method of fin component 29 is not limited thereto, and also can cut off the fin component 25 (with reference to Figure 16) after the extrudate 41 of the 4th execution mode or is made of the part that groove is processed the fin 25b in the formed fin component 25 (with reference to Figure 17) by removal.

" assembling of liquid-cooled jacket "

Then, as shown in figure 25, assembling cover main body 10C and fin component 29, same with the 4th execution mode, on one side against anchor clamps 210, this joint portion P2 is carried out friction stir on one side and engage.In addition, the length L 5 of the pin 201 of instrument 200 is preferably formed to being engaged below 60% of thickness T 3 that parts are the diapire 29a (obturator) of fin component 29.

" the 6th execution mode "

Below, the liquid-cooled jacket of the 6th execution mode is described with reference to Figure 26.Figure 26 is the profile of the liquid-cooled jacket of the 6th execution mode, and (a) completion status after the expression assembling is (b) before the expression assembling.

" structure of liquid-cooled jacket "

Shown in Figure 26 (a), the liquid-cooled jacket J6 of the 6th execution mode is characterised in that, compares with the liquid-cooled jacket J1 of the 1st execution mode, and it has cover main body 10A (the 1st fin component) and cap unit 35 (the 2nd fin component).Cover main body 10A has diapire 11 (the 1st soleplate) and separates the upright a plurality of fins 13 that are located on the diapire 11 of predetermined space.On the other hand, cap unit 35 has main body covered 36 (the 2nd soleplate) and separates the upright a plurality of fins 37 that cover on the main body 36 that are located at of predetermined space.

A plurality of fins 13 and a plurality of fin 37 interlocks, thus cover main body 10A and cap unit 35 combine, and lid main body 36 engages/is fixed on the cover main body 10A.The fin integral body of liquid-cooled jacket J6 is made of a plurality of fins 13 and a plurality of fin 37 of interlock.And then, becoming the 2nd stream B5a between adjacent fin 13 and the fin 37, liquid-cooled jacket J6 has the 2nd stream group B5 that is made of a plurality of the 2nd stream B5a.

Like this, constitute fin integral body by making a plurality of fins 13 and a plurality of fin 37 interlocks, thereby can widen the interval d1 of a plurality of fins 13 and the interval d2 of a plurality of fin 37 respectively, utilize cutting tools etc. to carry out groove processing and become easy.

Shown in Figure 26 (b), being set to from diapire 11 outstanding outstanding length L 1 of a plurality of fins 13 is identical or shorter than it with the outstanding length L 2 of giving prominence to from lid main body 36 of a plurality of fins 37.And a plurality of fins 37 and diapire 11 engage/fix in the mode that can carry out heat exchange, thereby hot link together by suitable means.Thus, the heat of the CPU 101 of cover main body 10A side (the 1st soleplate side) not only is delivered to a plurality of fins 13, also is delivered to a plurality of fins 37.

Promptly, it is identical or shorter by the outstanding length L 1 of a plurality of fins 13 is set at than it with the outstanding length L 2 of a plurality of fins 37, thereby when assembling cover main body 10A and cap unit 35, the front end of a plurality of fins 37 (top) can be connected on the diapire 11 of cover main body 10A reliably, thus a plurality of fins 37 of hot link and diapire 11 reliably.

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J6 is described simply.

According to this liquid-cooled jacket J6, if cooling water flow leads to the 2nd stream group B5, then CPU 101 heat that is delivered to a plurality of fins 13 and a plurality of fin 37 is delivered to the cooling water of circulation, can cool off CPU 101 effectively.

" the 7th execution mode "

The liquid-cooled jacket of the 7th execution mode then, is described with reference to Figure 27.Figure 27 is the profile of the liquid-cooled jacket of the 7th execution mode, and (a) completion status after the expression assembling is (b) before the expression assembling.

" structure of liquid-cooled jacket "

Shown in Figure 27 (a), Figure 27 (b), the liquid-cooled jacket J7 of the 7th execution mode is characterised in that, replaces the flat tube bank 20 of the liquid-cooled jacket J1 that the 1st execution mode relates to, possesses the metal honeycomb ceramics 26 with a plurality of pore 26a.

＜honeycomb ceramics 〉

Honeycomb ceramics 26 engages/is fixed on the diapire 11 of cover main body 10 in the mode that can carry out heat exchange by suitable means.Therefore, the heat of CPU 101 is delivered to the perisporium 26b that surrounds pore 26a.Each pore 26a plays a role as cooling the 2nd stream B6a that but current are logical.That is, honeycomb ceramics 26 has the 2nd stream group B6 that is made of a plurality of the 2nd stream B6a.In addition, herein as shown in figure 27, though for example understand the honeycomb ceramics 26 with the rectangular pore 26a in cross section, the shape of pore 26a is not limited thereto, and in addition also can be hexagon etc.And preferred honeycomb ceramics 26 passes through solder with the diapire 11 of cover main body 10, engages reliably in the mode that can carry out heat exchange.

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J7 is described simply.

Cooling water is according to the order circulation of the 1st stream A1, the 2nd stream group B6 (a plurality of the 2nd stream B6a), the 3rd stream C1.And then mainly at the perisporium 26b of honeycomb ceramics 26 and circulate between the cooling water of the 2nd stream B5a and carry out heat exchange, the heat of perisporium 26b passes to cooling water.Consequently, can cool off CPU 101 effectively.

" the 8th execution mode "

The liquid-cooled jacket of the 8th execution mode then, is described with reference to Figure 28.Figure 28 is the profile of the liquid-cooled jacket of the 8th execution mode, and (a) completion status after the expression assembling is (b) before the expression assembling.

" structure of liquid-cooled jacket "

Shown in Figure 28 (a), Figure 28 (b), the liquid-cooled jacket J8 of the 8th execution mode is characterised in that, replaces the flat tube bank 20 of the liquid-cooled jacket J1 in the 1st execution mode, and having the cross section is wavy metal heat exchanging fin 27 (solder brazing sheet).

＜heat exchanging fin 〉

Heat exchanging fin 27 has sheet main body 27a that is formed by aluminium alloys such as Al-Mn system, Al-Fe-Mn systems and the solder layer 27b that is formed by aluminium alloys such as Al-Si-Zn systems in its lower face side.And by partial melting, the sclerosis of solder layer 27b, thereby heat exchanging fin 27 engages/is fixed on the diapire 11 of cover main body 10 in the mode that can carry out heat exchange.Therefore, the heat of CPU 101 is delivered to heat exchanging fin 27 via diapire 11.

And, between heat exchanging fin 27 and cover main body 10 or lid main body 31, form a plurality of the 2nd stream B7a.That is, liquid-cooled jacket J8 has the 2nd stream group B7 that is made of a plurality of the 2nd stream B7a.

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J8 is described simply.

Cooling water is according to the order circulation of the 1st stream A1, the 2nd stream group B7 (a plurality of the 2nd stream B7a), the 3rd stream C1.And then at heat exchanging fin 27 and circulate between the cooling water of the 2nd stream B7a and carry out heat exchange, thereby the heat of heat exchanging fin 27 passes to cooling water.Consequently, can cool off CPU 101 effectively.

" the 9th execution mode "

The liquid-cooled jacket of the 9th execution mode then, is described with reference to Figure 29.Figure 29 is the vertical view of the liquid-cooled jacket of the 9th execution mode.And, in Figure 29,, described to unload the state after the lower cover main body for the ease of understanding.

" structure of liquid-cooled jacket "

The liquid-cooled jacket J1 of the 1st execution mode has 1 flat tube bank 20, but as shown in figure 29, the liquid-cooled jacket J9 of the 9th execution mode has 3 flat tube banks 20.And 3 flat tube banks 20 are with the shape of row, are configured in the cover main body 10B for unidirectional mode with the hollow bulb 21a (the 2nd stream B1a) of each flat tube bank 20.And, 3 flat tube banks 20 are in cover main body 10B, being provided with space 10d between the flat tube bank 20 in the flat tube bank 20 of upstream and middle reaches, between the flat tube bank 20 in the flat tube bank 20 in middle reaches and downstream, being provided with under the state of space 10d, engage/be fixed in the mode that can carry out heat exchange on the diapire 11 of cover main body 10B.

The 4th stream E1, the E1 (connection stream) that space 10d, 10d are communicated with as the 2nd stream group B1 series connection that makes flat tube bank 20 and playing a role.The flow path cross sectional area of the 4th stream E1 is set to the flow path cross sectional area greater than the 2nd stream B1a that constitutes each the 2nd stream group B1.That is, liquid-cooled jacket J9 has 3 the 2nd stream group B1, B1, the B1 (the 2nd stream group portion) of configured in series.

" action effect of liquid-cooled jacket "

Below, the action effect of liquid-cooled jacket J9 is described simply.

Cooling water is according to the order circulation of the 2nd stream group B1, the 3rd stream C1 in the 2nd stream group B1, the 4th stream E1 in the 2nd stream group B1, the 4th stream E1 of the 1st stream A1, upstream, middle reaches, downstream.That is cooling water in series circulation in 3 the 2nd stream group B1, B1, B1.Herein, via the 4th stream E1, thus, cooling water suffered pressure loss in the 4th stream E1 reduces cooling water between adjacent the 2nd stream group B1, B1.That is, by making the 4th big stream E1 of flow path cross sectional area between the 2nd stream group B1, B1, thereby the situation of the 2nd stream group long with forming the flow path length that there is not the 4th stream E1 compare, can reduce to act on the load on the micropump 122.

" the 10th execution mode "

The liquid-cooled jacket of the 10th execution mode then, is described with reference to Figure 30, Figure 31.Figure 30 is the vertical view of the liquid-cooled jacket of the 10th execution mode.Figure 31 is the turn back curve chart of number and the relation of thermal resistance of expression.

As shown in figure 30, the liquid-cooled jacket J10 of the 10th execution mode and the liquid-cooled jacket J9 of the 9th execution mode are same, have 3 the 2nd stream group B1, B1, the B1 (the 2nd stream group portion) that are connected in series, adjacent the 2nd stream group B1, B1 are connected in series via the 4th stream E1 (connection stream) on the circulating direction of cooling water.

But, in liquid-cooled jacket J10, be set up in parallel adjacent the 2nd stream group B1, B1, and the upstream extremity of the downstream of the 2nd stream group B1 of the 2nd adjacent stream group B1 middle and upper reaches side and the 2nd stream group B1 in downstream is configured in the same side, and above-mentioned downstream and upstream extremity are connected in series via the 4th stream E1.Particularly, as shown in figure 30, the 2nd stream group B1 of the 2nd stream group B1 of upstream position and position, middle reaches is adjacent on the circulating direction of cooling water, and transversely being set up in parallel at Figure 30.And then, for example the upstream extremity of the 2nd stream group B1 of the downstream of the 2nd stream group B1 of upstream position and position, middle reaches towards the same side, be the downside of Figure 30.

Herein, in this manual, with respect to the 9th execution mode, the 2nd stream group B1 that such configuration arranged side by side is adjacent, the state of B1 are expressed as " turning back ".

Therefore, according to this liquid-cooled jacket J10, portion is mobile within it agley for cooling water.So the thermal resistance of liquid-cooled jacket J10 is littler than the thermal resistance of the liquid-cooled jacket J9 that does not turn back.

If further specify, then under the situation of the constant dimension of establishing the liquid-cooled jacket when overlooking,, and increase the number that turns back if do not change the quantity of the 2nd stream that constitutes each the 2nd stream group B1, increase the quantity of the 2nd stream group B1, the flow path cross sectional area that then constitutes each the 2nd stream of each the 2nd stream group B1 diminishes.Thereby under the flow of establishing the cooling water that circulates in liquid-cooled jacket was constant situation, if the quantity of the 2nd stream group B1 increases, then the flow velocity of the cooling water by each the 2nd stream increased.Thereby heat can be effectively from liquid-cooled jacket to the cooling water transmission, the thermal resistance of liquid-cooled jacket descends.

More than preferred implementation of the present invention has been illustrated an example, but the present invention is not limited to the respective embodiments described above, both can suitably make up various execution modes in the scope that does not break away from purport of the present invention, also can followingly be out of shape like that.

Illustrated that in the respective embodiments described above heater is the situation of CPU 101, but the kind of heater being not limited thereto, for example also can be power model (Power Module), LED lamp etc.

In above-mentioned the 1st execution mode, flat tube bank 20 constitutes that a plurality of flat tubes 21 of boundling form on its thickness direction, but also can be further on Width a plurality of flat tubes 21 of boundling constitute.

Has the situation (with reference to Fig. 6) of flat tube bank 20 although understand many flat tubes of liquid-cooled jacket J1 boundling 21 of above-mentioned the 1st execution mode, but in addition for example also can be shown in figure 32, replace flat tube bank 20 and have the liquid-cooled jacket J11 of flat tube 28, this flat tube 28 has by the separated a plurality of hollow bulb 28a of a plurality of partition walls.Under this situation, each hollow bulb 28a plays a role as the 2nd stream B8a, and flat tube 28 has the 2nd stream group B8 that is made of a plurality of the 2nd stream B8a.

In the liquid-cooled jacket J1 of above-mentioned the 1st execution mode, illustrated on lid main body 31 and be formed with the situation that is taken into mouthful 31a and outlet 31b, but the position that is taken into mouthful 31a and outlet 31b is not limited thereto, and also can for example be formed in the situation on the perisporium 12 that overlaps main body 10.Follow in this, the position that is taken into pipe 32 and discharge pipe 33 also is not limited to the upper surface side of liquid-cooled jacket J1, also can be positioned at side.

In the liquid-cooled jacket J6 of above-mentioned the 6th execution mode, constitute fin 13 upright being located on the cover main body 10A, fin 37 upright being located at are covered (with reference to Figure 26) on the main body 36, but also can be shown in Figure 33 (a), Figure 33 (b), be such liquid-cooled jacket J12: this liquid-cooled jacket J12 has the 1st fin component 50 and the 2nd fin component 55, and wherein the 1st fin component 50 has the 1st soleplate 51 and upright a plurality of the 1st fins 52 that are located on the 1st soleplate 51; The 2nd fin component 55 has the 2nd soleplate 56 and upright a plurality of the 2nd fins 57 that are located on the 2nd soleplate 56.

If further specify liquid-cooled jacket J12 shown in Figure 33, then the 1st fin component 50 and the 2nd fin component 55 combine by a plurality of the 1st fins 52 and 57 interlocks of a plurality of the 2nd fin, metal a plurality of fin integral body among the liquid-cooled jacket J12 are made of a plurality of the 1st fins 52 and a plurality of the 2nd fin 57, are formed with the 2nd stream B9a between the 1st adjacent fin 52 and the 2nd fin 57.In addition, the 1st fin component 50 is positioned at CPU 101 sides, and the 1st soleplate 51 of the 1st fin component 50 is fixed on the diapire 11 of cover main body 10 in the mode that can carry out heat exchange.

And liquid-cooled jacket J12 has the 2nd stream group B9 that is made of a plurality of the 2nd stream B9a.And being set to from the 1st soleplate 51 outstanding outstanding length L 3 of a plurality of the 1st fins 52 is identical or shorter than it with the outstanding length L 4 of giving prominence to from the 2nd soleplate 56 of a plurality of the 2nd fins 57.And a plurality of the 2nd fins 57 and the 1st soleplate 51 engage/fix in the mode that can carry out heat exchange by suitable means, and hot link together.

In above-mentioned the 1st execution mode, by between cover main body 10 and flat tube bank 20, space 10a, 10c being set, thereby form the 1st stream A1, the 3rd stream C1 (with reference to Fig. 5) respectively, but in addition for example also space 10a, 10c can be set, and in the outside of overlapping main body 10, side is provided with branched pipe at its upstream, with its hollow bulb as the 1st stream; In the downstream concetrated pipe is set, with its hollow bulb as the 3rd stream.

In the liquid-cooled jacket J4 of above-mentioned the 4th execution mode (with reference to Figure 14), constituting fin component 25 is fixed on the cover main body 10, but also can be a kind of like this liquid-cooled jacket J13 as shown in figure 34, the fin component 25 of this liquid-cooled jacket J13 is fixed on the face of cover main body 10 sides of covering main body 31.But also can constitute on lid main body 31 CPU 101 is installed as shown in figure 34.And then, also can constitute cover be equipped with in the main body 10 as cooling water is taken in the liquid-cooled jacket J13 be taken into mouthful be taken into pipe 32 and as the discharge pipe 33 of outlet.In addition, can also constitute on the face of cover main body 10 sides of lid main body 31 and formed fin.

In addition, as shown in figure 35, cover main body 10 has 4 foots 16, this foot 16 has through hole 16a, Screw 125 is in each through hole 16a, be installed at liquid-cooled jacket J13 under the situation on the housing 126 of personal computer main body 120 (with reference to Fig. 1), the optimum seeking site of extracting of instrument 200 is the part that is equivalent to through hole 16a.And then, after puller 200 on this position, extract at this and to form through hole 16a on vestige part, thus can hide tools 200 extract vestige.

And Figure 34 is the X1-X1 cross section of Figure 35.

Embodiment

Below, further specifically describe the present invention according to embodiment.

(1) embodiment 1, to the research of the well width W1 of the 2nd stream B3a

About the liquid-cooled jacket J4 of the 4th execution mode (with reference to Figure 13 etc.), made the well width W1 (with reference to Figure 15) that makes the 2nd stream B3a liquid-cooled jacket for the aluminium alloy system of 0.2mm, 0.5mm, 1.0mm.The specification of the liquid-cooled jacket J4 that table 1 expression is produced.

And in table 1, whole flow path width W0 is the width of the 1st stream A1 and the 3rd stream C1.In addition, whole stream length L 0 be the 1st stream A1 length, the length of the 2nd stream B3a and the length sum (with reference to Figure 13, Figure 14) of the 3rd stream C1.

[table 1]

The thermal conductivity of aluminium alloy (W/mk)	200
		Whole flow path width W0 (mm)	100
Whole stream length L 0 (mm)	100
		The well width W1 (mm) of the 2nd stream B3a	0.2、0.5、1.0
The depth D 1 (mm) of the 2nd stream B3a	10

Then, make water,, the well width W1 of the 2nd stream B3a and the thermal resistance of liquid-cooled jacket J4 and the relation of the pressure loss are studied so that this water makes micropump 122 (with reference to Fig. 1) running (with reference to table 2) in the mobile mode of 5 (L/min) as cooling water.Use suitable method to measure the thermal resistance and the pressure loss.And, in the liquid-cooled jacket J4 of this specification, make thermal resistance as target be 0.008 (℃/W) below.

[table 2]

Cooling water	Water
		The flow of cooling water (L/min)	5.0

As shown in figure 36, along with the well width W1 of the 2nd stream B3a diminishes, it is big that the contact area of liquid-cooled jacket J4 and cooling water becomes, so the thermal resistance of liquid-cooled jacket J4 diminishes.On the other hand, can confirm, as the well width W1 of the 2nd stream B3a during greater than 1.1mm, thermal resistance greater than as target 0.008 (℃/W).

In addition, can confirm, as the well width W1 of the 2nd stream B3a during less than 0.2mm, the pressure loss that cooling water is subjected to because of liquid-cooled jacket J4 greater than 0.01 (℃/W).

Therefore, can think that the well width W1 of the 2nd stream B3a is preferably 0.2～1.1mm.

(2) embodiment 2, to the research of the relation of the well width W1 of the thickness T 1 of fin 25b and the 2nd stream B3a

Then, similarly to Example 1, the well width W1 of the 2nd stream B3a is set at 0.2mm, 0.5mm, 1.0mm this 3 kinds (with reference to table 1), the thickness T 1 that makes fin 25b suitably changes with respect to the well width W1 of each the 2nd stream B3a, and " thickness T 1 of fin 25b and the ratio (T1/W1) of well width W1 " studied with the relation of " thermal resistance ".

As shown in figure 37, the scope that has " T1/W1 " that thermal resistance diminishes among each well width W1.This scope is that the minimum thermal resistance among each well width W1 increases by 5% the following scope of value.

Particularly, be under the situation of 1.0mm at the well width W1 of the 2nd stream B3a, minimum thermal resistance be 0.0073 (℃/W), so its increase by 5% value be 0.0073 * 1.05=0.0076 (℃/W).And then, become 0.0076 (℃/W) following scope is 0.5≤T1/W1≤1.4.

Same therewith, when the well width W1 of the 2nd stream B3a was 0.5mm, above-mentioned scope became 0.7≤T1/W1≤2.1.And when the well width W1 of the 2nd stream B3a was 0.2mm, above-mentioned scope became 0.8≤T1/W1≤2.9.

And then, if in view of the above X-axis is rewritten as " well width W1 ", Y-axis is rewritten as " fin thickness T1/ well width W1 ", then can obtain curve chart shown in Figure 38.As shown in figure 38, can confirm, " well width W1 " and " fin thickness T1/ well width W1 " preferably satisfies following formula (1).

—0.375×W1+0.875≤T1/W1≤—1.875×W1+3.275…(1)

(3) the 3rd embodiment are to the research of the relation of the well width W1 of the 2nd stream B3a and depth D 1

Then, in the liquid-cooled jacket J4 of the 4th execution mode, the well width W1 of the 2nd stream B3a is set at 0.2mm, 0.5mm, 1.0mm this 3 kinds (with reference to table 1), the depth D 1 that makes groove suitably changes with respect to the well width W1 of each the 2nd stream B3a, and " depth D 1 " and the relation of " thermal resistance " are studied.

As shown in figure 39, similarly to Example 2, can confirm, in each well width W1, have the scope of the groove depth D1 that thermal resistance diminishes.And then, if obtain this scope similarly to Example 2, then become 2≤D1≤6 during for 0.2mm as well width W1; When well width W1 becomes 4≤D2≤11 during for 0.5mm; When well width W1 becomes 6≤D1≤18 during for 1.0mm.

And then, if in view of the above X-axis is rewritten as " well width W1 ", Y-axis is rewritten as " groove depth D1 ", then can obtain curve chart shown in Figure 40.As shown in figure 40, can confirm " well width W1 " and preferably satisfy following formula (2) with " groove depth D1 ".

5×W+1≤D≤16.25×W+2.75…(2)

(4) embodiment 4, to the research of the validity of anchor clamps

Then, in the cover main body 10 of the 4th execution mode with during the friction stir of lid main body 31 engages, the validity that anchor clamps 210 are resisted against on the perisporium 12 that overlaps main body 10 is studied.And in this research, 2 kinds of instruments 200 shown in the table 3 have been used.And then as shown in table 4, make distance L 6 variations (with reference to Figure 19) of outer peripheral face with the outer peripheral face of the perisporium 12 of cover main body 10 of the shaft shoulder 202 in A instrument or the B instrument, and change having/not having of anchor clamps 210, perisporium 12 and lid main body 31 have been carried out the friction stir joint.And then, by the visual quality of estimating the junction surface.Zero expression is good, and * expression engages bad.

In addition, the rotating speed of establishing instrument 200 is 6000rpm, and engaging speed is 200mm/min.And the thickness T 11 (with reference to Figure 19) of establishing perisporium 12 is 4mm.

[table 3]

	The A instrument	The B instrument
			Shaft shoulder diameter (mm)	6.0	8.0
Pin diameter (mm)	2.5	3.0
			Pin length (mm)	2.0	2.0

[table 4]

Instrument	Distance L 6 (mm)	Anchor clamps	The junction surface quality
				The A instrument	1.0	Have	○
The A instrument	0.5	Have	○
				The B instrument	0.0	Have	×
The A instrument	1.0	Do not have	×

As table 4 is expressed, can confirm, using under the situation of anchor clamps 210, even perisporium 12 is thin, distance L 6 be 0.5mm, perisporium 12 is out of shape and can engages well and cover main body 31.

(5) embodiment 5, the length L 5 of pin and the relation of the thickness T 2 of covering main body 31

Then, studied the relation (with reference to Figure 19) of length L 5 and the thickness T 2 of lid main body 31 of the pin 201 of instrument 200.As shown in table 5, in this research, will sell 201 length L 5 and be fixed on 2.0mm, the thickness T 2 of covering main body 31 is changed, by the visual junction surface quality of having estimated.

[table 5]

The length L 5 (mm) of pin	The thickness T 2 (mm) of lid main body	L5/T2 (％)?	The junction surface quality
				2.0	6.0	33.3	○
2.0	5.0	40.0	○
				2.0	4.0	50.0	○
2.0	3.0	66.6	×

As shown in table 5, can confirm, be in the length L 5 of pin 201 and be engaged in the scope below 60.0% of thickness T 2 that parts promptly cover main body 31, can engage perisporium 12 and lid main body 31 well.

Claims (18)

1. liquid-cooled jacket, the heat that this liquid-cooled jacket produces heater pass to supply with from the hot conveyance fluid feed unit of outside, at the hot conveyance fluid of this liquid-cooled jacket internal circulation, it is characterized in that this liquid-cooled jacket has:

The 1st stream of above-mentioned hot conveyance fluid feed unit side;

The 2nd stream group that constitutes by a plurality of the 2nd streams from above-mentioned the 1st stream branch; And

Make the 3rd stream of these a plurality of the 2nd stream set in the downstream of above-mentioned a plurality of the 2nd streams,

Above-mentioned heater mainly carries out heat exchange in above-mentioned the 2nd stream group,

Above-mentioned liquid-cooled jacket also has:

The cover main body, it has the fin receiving room of taking in metal fin when inside flows into hot conveyance fluid; And

Seal the obturator of above-mentioned fin receiving room,

The perisporium of above-mentioned cover main body and above-mentioned obturator engage by friction stir and are one, and have formed the initiating terminal repetition junction surface overlapping with finishing end in above-mentioned friction stir engages,

Above-mentioned obturator and above-mentioned metal fin are integrally formed, and above-mentioned heater is installed.

2. liquid-cooled jacket according to claim 1, it is characterized in that, above-mentioned obturator is to have soleplate and the upright fin component that is located at a plurality of fins on the above-mentioned soleplate that is made of metal extrudate, and constitutes by a part of removing the fin in the above-mentioned fin component.

3. liquid-cooled jacket according to claim 1 is characterized in that, above-mentioned obturator is the fin component with a plurality of grooves that carry out cut and form on metal, and constitutes by a part of removing the fin in the above-mentioned fin component.

4. liquid-cooled jacket according to claim 1 is characterized in that, above-mentioned obturator is to have the fin component that revolves a plurality of fins of scraping processing and forming on tabular plate, and constitutes by a part of removing the fin in the above-mentioned fin component.

5. liquid-cooled jacket according to claim 1 is characterized in that,

Above-mentioned perisporium on one side anchor clamps is resisted against and carries out above-mentioned friction stir joint on the above-mentioned perisporium on one side, so that can not deform laterally.

6. liquid-cooled jacket according to claim 1 is characterized in that,

The length of the pin of the instrument that uses in above-mentioned friction stir engages is below 60% of thickness of above-mentioned obturator.

7. liquid-cooled jacket according to claim 1 is characterized in that,

In above-mentioned friction stir engaged, above-mentioned joint portion was left in the position of extracting of above-mentioned instrument.

8. liquid-cooled jacket according to claim 1, it is characterized in that, heater is installed on the precalculated position of this liquid-cooled jacket, the heat that this liquid-cooled jacket produces this heater pass to supply with from the hot conveyance fluid feed unit of outside, at the hot conveyance fluid of this liquid-cooled jacket internal circulation

This liquid-cooled jacket has towards the downstream: the 1st stream; A plurality of the 2nd stream groups, described the 2nd stream group is made of a plurality of the 2nd streams; And the 3rd stream, above-mentioned heater mainly carries out heat exchange in above-mentioned the 2nd stream group,

Adjacent above-mentioned the 2nd stream group is connected in series via connecting stream.

9. liquid-cooled jacket according to claim 1 is characterized in that,

Adjacent above-mentioned the 2nd stream group is set up in parallel, and the downstream of one of them and another upstream extremity are in the same side.

10. liquid-cooled jacket according to claim 1 is characterized in that,

Above-mentioned obturator has a plurality of metal fin of arranging with predetermined space,

It between the adjacent fin above-mentioned the 2nd stream.

11. liquid-cooled jacket according to claim 10 is characterized in that,

The width W of above-mentioned the 2nd stream is 0.2～1.1mm.

12. liquid-cooled jacket according to claim 10 is characterized in that,

The thickness T of the fin between the width W of above-mentioned the 2nd stream and adjacent above-mentioned the 2nd stream satisfies following formula (1):

—0.375×W+0.875≤T/W≤—1.875×W+3.275…(1)。

13. liquid-cooled jacket according to claim 10 is characterized in that,

The depth D of above-mentioned the 2nd stream and width W satisfy following formula (2):

5×W+1≤D≤16.25×W+2.75…(2)。

14. liquid-cooled jacket according to claim 1 is characterized in that,

Above-mentioned metal is aluminium or aluminium alloy.

15. liquid-cooled jacket according to claim 1 is characterized in that,

The outlet of the hot conveyance fluid that is taken into mouth and is communicated with above-mentioned the 3rd stream of the hot conveyance fluid that is communicated with above-mentioned the 1st stream is the center balanced configuration with above-mentioned heater.

16. liquid-cooled jacket according to claim 15 is characterized in that,

Above-mentioned be taken into mouthful with above-mentioned outlet be configured to relative away from.

17. liquid-cooled jacket according to claim 15 is characterized in that,

The above-mentioned mouth that is taken into is configured near above-mentioned heater with above-mentioned outlet.

18. liquid-cooled jacket according to claim 1 is characterized in that,

Above-mentioned heater is CPU.

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