Source: https://patents.google.com/patent/CN101611492B/en
Timestamp: 2020-03-30 14:54:08
Document Index: 295923666

Matched Legal Cases: ['art 36', 'art 36', 'art 36', 'art 36', 'arts 48', 'art 48', 'art 50', 'art 48', 'art 36', 'art 48', 'art 36', 'art 38', 'art 50', 'art 38', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'art 36', 'arts 48', 'art 48', 'art 36', 'art 50', 'art 50', 'art 38', 'art 38', 'art 36', 'art 48', 'art 36', 'art 38', 'art 48', 'art 48', 'art 36', 'art 38', 'art 36', 'art 38', 'art 36', 'art 36']

CN101611492B - Electronic board and cold plate for said board - Google Patents
CN101611492B
CN101611492B CN2008800018366A CN200880001836A CN101611492B CN 101611492 B CN101611492 B CN 101611492B CN 2008800018366 A CN2008800018366 A CN 2008800018366A CN 200880001836 A CN200880001836 A CN 200880001836A CN 101611492 B CN101611492 B CN 101611492B
sunk part
CN2008800018366A
CN101611492A (en
Electronic circuit board and be used for the coldplate of this circuit board
The present invention relates to a kind of electronic circuit board and a kind of coldplate that is used to cool off this circuit board.
Have a kind of electronic circuit board, it has:
-at least one electronic power element has a base plate, can directly contact with heat transport fluid,
-one coldplate, with at the fixing base plate of electronic power element of the mode of heat transport fluid sealing, this coldplate has on it:
At least one sunk part, its opening lead to the electronic power element base plate below,
A heat transport fluid enters the hole that enters in the sunk part, and
A heat transport fluid flows out the tap of sunk part.
For these electronic circuit boards, some plastic insertion pieces are inserted in the sunk part.Each insert all has a plurality of passages, a side with enter the hole and carry out fluid ground and be connected, and lead to the vertical line of electronic power element base plate at opposite side.During work, each passage all produces a heat transport fluid jet perpendicular to electronic power element base plate, so that the heat exchange optimization.
The manufacturing of this insert and especially processing are very complicated.
The present invention is intended to remedy this defective, proposes a kind of electronic circuit board of above-mentioned cooling type, and its enforcement is simpler.
Therefore, theme of the present invention is a kind of electronic circuit board, and its coldplate has:
-one spray dull and stereotyped, between entering between hole and the tap, and
-a plurality of straight line spouts, run through jet tray along an injection direction, along the spout length of injection direction more than or equal to Breadth Maximum perpendicular to this unidirectional spout, so that form a heat transport fluid jet along injection direction, the injection direction of each spout forms an angle α with respect to direction perpendicular to base plate, this angle α-30 ° and+30 ° between.
Above-mentioned electronic circuit board is implemented fairly simple, because the manufacturing of a plate that is passed by spout is simpler than the manufacturing with the insert that directly leads to the passage that enters the hole.
Theme of the present invention is that also is suitable for a coldplate that uses in above-mentioned electronic circuit board.
The embodiment of this coldplate can have one or more following features:
-each spout is all formed by a hole of passing jet tray;
The injection direction of-each spout is perpendicular to the front or the back of jet tray, the front of jet tray is the one side towards base plate, and the back is the one side opposite with the front, wherein, jet tray is with respect to angle β of plane inclination of electronic power element base plate, this angle β-30 ° and+30 ° between;
-coldplate has pipeline, can make heat transport fluid by entering the hole and tap circulates, and these pipelines all are positioned on the same plane, and this plane parallel is in the plane that is limited by base plate;
-coldplate has:
First and second sunk part, first and second sunk parts respectively have an opening to lead to below the base plate of the same first electronic power element,
At least one the 3rd sunk part has an opening and leads to below the base plate of the second electronic power element,
The tap of first sunk part, by the 3rd sunk part enter hole and tap, carry out being connected of fluid with the hole that enters of second sunk part;
-coldplate comprises at least ten spouts, and layout each other will form the shock point of the heat transport fluid jet that is evenly distributed on the base plate, and promptly the distance between two adjacent shock points equates all that each other error is approximately 15%.
In addition, these embodiment of coldplate also have the following advantages:
-spout is realized by the hole on the plate, has simplified the enforcement of this plate,
-spout has further facilitated the enforcement and the manufacturing of this plate perpendicular to the front or the back of plate,
The summation of-spout horizontal area equals to enter the area of hole and tap, helps heat transport fluid flowing in coldplate,
The arrangement of-pipeline can make the same plane cocycle of heat transport fluid in coldplate, and can limit the thickness of this coldplate, and can cool off, thereby can discharge the heat of other element that is installed on the circuit board but does not directly contact with heat transport fluid to entire plate,
-utilize its opening to lead to first and second sunk parts under the base plate of same electronic power element, and assign to connect this two sunk parts by the 3rd depressed part that is used to cool off the second electronic power element, the situation of only assigning to cool off separately with respect to the first and second electronic power elements by a depressed part, can reduce the cooling difference of the first and second electronic power elements
-use the spout more than ten can improve cooling effectiveness.
Only provide below the reading and, can understand the present invention better with reference to the description that accompanying drawing carries out as the indefiniteness example, in the accompanying drawing:
-Fig. 1 is the schematic perspective view of an electronic circuit board,
-Fig. 2 is the schematic perspective view of the coldplate that uses in the circuit board of Fig. 1,
-Fig. 3 is the partial sectional view of first embodiment of jet tray that can be used for the coldplate of Fig. 2,
-Fig. 4 and Fig. 5 are respectively the schematic diagram of the second and the 3rd embodiment of the jet tray of the coldplate that can be used for Fig. 2.
In these figure, identical label is represented identical parts.
In the following description, feature well known to those skilled in the art and function will not be described in detail.
Fig. 1 illustrates an electronic circuit board 2, is furnished with a plurality of electronic power elements on the coldplate 4 that are installed in.
Here, the electronic power element be meant can by tens amperes interchange or direct current by and the element that can not damage.Relate to the switch that to change this electric current typically.
Here, circuit board 2 has five power switchs 6 to 10.These power switchs are realized by igbt transistor (igbt).Other electron component shown in Figure 1 is optional for the work of understanding coldplate, therefore is not described in detail at this.
A side of coldplate 4 has a plane of orientation 13, admits four joints 14 to 17 removably, coldplate 4 can be carried out fluid with one or more heat transport fluids source and be connected.More properly, joint 14 and 17 is upstream joints, and heat transport fluid enters in the coldplate 4 by them.On the contrary, joint 15 and 16 is downstream joints, and heat transport fluid flows out from coldplate 4 by them.Each joint 14 to 17 all is furnished with an isolating valve, can stop flowing of heat transport fluid, especially when joint 14 to 17 breaks away from plane of orientation 13.
Plate 4 also is furnished with four valves 20 to 23 here, can interrupt flowing of inflow or effluent fluid by joint 14 to 17 respectively separately.
Coldplate is used to cool off various electronic components mounted thereto, and electronic power element particularly, as switch 6 to 10.
Fig. 2 illustrates in greater detail coldplate 4.Coldplate 4 is made of a plate 26, realizes with a kind of good heat carrier material.Here, good heat carrier material is meant the material of heat conductivity greater than 50W/mK.For example, plate 26 is made by aluminium EN AW6082.
Coldplate 4 also is included in five grooves 28 to 32 of leaving in the thickness of plate 26.28 to 32 upper surfaces that lead to plate 26 of each groove, respectively directly at switch 6 below 10.Or rather, when switch (IGBT) was installed on the coldplate 4, the open circumferential of each groove all was positioned at below the corresponding switch fully.
Here, groove 28 is identical with 32 structure, and the difference of these grooves only is the position on plate 26.Equally, groove 29,30 and 31 structure are also identical, and only are the position differences on plate 26.Therefore, only the structure of groove 28 and 29 is described in detail at this.
Groove 28 constitutes each other side by side and by the sunk part 36 and 38 that a sealed wall 40 is separated from each other by two.The design of wall 40 is to be used for stoping the heat transport fluid of one of them sunk part directly to enter another sunk part.Here, sunk part 36 and 38 is identical, and each all is a parallelepiped shape.
An oblique jet tray all is installed in each sunk part 36 and 38, is respectively 42 and 44.
The structure of sunk part 36 is described with reference to Fig. 3 after a while.
Groove 29 also has two sunk parts 48 and 50, each other by a wall 52 separately.Yet opposite with wall 40, this backing 52 has one or more holes, can make sunk part 48 carry out being connected on the fluid with sunk part 50.
Each sunk part 48 and 50 has an oblique jet tray, is respectively 54 and 56.The sunk part of groove 29 and the structure of swash plate and groove 28 are similar, and be therefore not for a more detailed description at this.
Coldplate has one first cooling circuit of switch 6 and 7, and it has:
-one pipeline 56 is connected with sunk part 36 joint 14 on fluid,
-one pipeline 57 is connected with sunk part 48 sunk part 36 on fluid,
-one pipeline 58 is connected with sunk part 38 sunk part 50 on fluid, and
-one pipeline 59 is connected with joint 15 sunk part 38 on fluid.
Coldplate 4 also is included in one second heat transport fluid circulation circuit below switch 8,9 and 10, and it constitutes:
-one pipeline 60 is connected with the left side sunk part of groove 32 joint 17 on fluid,
-one pipeline 61 is connected with first sunk part of groove 31 this left side sunk part on fluid,
-one pipeline 62 is connected with first sunk part of groove 30 second sunk part of groove 31 on fluid,
-one pipeline 63 is connected with the right sunk part of groove 32 second sunk part of groove 30 on fluid, and
-one pipeline 64 is connected with joint 16 the right sunk part of groove 32 on fluid.
All these pipelines 56 to 64 all are positioned at the same plane of the upper surface that is parallel to plate 26.
Fig. 3 illustrates in greater detail sunk part 36 and plate 42.
Pipeline 56 by heat transport fluid enters hole 70 and leads in the sunk part 36.After passing sunk part 36, heat transport fluid flows out sunk part 36 by a tap 72.Hole 72 is made of the pipeline 57 that leads in the sunk part 36.Here, hole 70 and 72 is coaxial.
As shown in Figure 3, lead to plate 26 upper surface groove 28 opening by an annular groove 74 around.This annular groove 74 is admitted an O-ring seal 76.Sealing ring 76 can guarantee the sealing between the upper surface of the base plate 78 of switch 6 and plate 26.Typically, base plate 78 constitutes the lower surface of switches 6, and with good heat carrier material, realize as copper.
Because base plate 78 covers the opening of the groove 28 that leads to plate 26 upper surfaces fully, so this opening by base plate 78 hermetically closings, makes heat transport fluid can not flow out from this opening.Can see that also base plate 78 directly contacts with heat transport fluid in the sunk part 36.
Figure 3 illustrates two orthogonal direction X and Y.Direction Y is perpendicular to the plane of base plate 78.Direction X is parallel to the plane of base plate 78.
Jet tray 42 have one towards the front 80 of base plate 78 and one towards the hole 70 back 82.
Here, be installed with the hole on the plate 42, each hole forms a spout, is suitable for forming the jet of a heat transport fluid, directly impacts base plate 78 along an injection direction that is basically perpendicular to base plate 78.The fact that jet is basically perpendicular to base plate 78 has improved cooling effectiveness.Here, be basically perpendicular to injection direction P that base plate 78 the is meant jet angle α between forming-30 ° to+30 ° with respect to direction Y.Injection direction P represents with vector P in Fig. 3.
Fig. 3 only shows five holes 86 to 90.All extend along injection direction P in each hole.In this embodiment, injection direction P is also perpendicular to face 80 and 82.The maximum lateral width in each hole all is chosen to be less than or equal to the length along the hole of direction P.
In addition, here, the minimum widith in each hole all is chosen to more than or equal to 0.5 millimeter.
In this embodiment, all there is a constant circular cross section in each hole.In addition, the selection of the diameter in hole will make the summation of the horizontal area in hole equal the horizontal area in hole 70.
The area in hole 72 also equals the area in hole 70.
The cross section of pipeline 56 to 59 is constant.
Plate 42 makes that the heat transport fluid of passing sunk part 36 more than 85% is passed the hole that forms on the plate 42 equally between hole 70 and hole 72.For this reason, plate 42 directly leans against on the upstream wall of sunk part 36 along a line 94 that is positioned at 70 tops, hole.In a relative side, plate 42 directly leans against on the downstream wall of sunk part 36 along a line 96 that is positioned at 72 belows, hole.Here, plate 42 is demountable.For example, it just is placed in the sunk part 36, and when heat transport fluid is passed hole 86 to 90, constant by the base plate holding position of plate 42.For example, base plate constitutes the backstop of plate, makes the injection direction of heat transport fluid keep being basically perpendicular to this base plate.
In Fig. 3, therefore line 94 and 96 planes perpendicular to figure are represented with point.
Plate 42 also contacts with the wall 40 of sunk part 36 and the wall relative with this wall 40.
In order to make direction P be basically perpendicular to base plate 78, here, the angle β between the plane of plate 42 forms-30 ° and 0 ° with respect to the plane of base plate 78.This angle β illustrates with respect to direction X in Fig. 3.
As an example, in this embodiment, the diameter in each hole is 3 millimeters, and the thickness of plate 42 also is 3 millimeters.
When coldplate 4 work, heat transport fluid enters in the sunk part 36 by hole 70.Then, it sprays along direction P with the form of jet 100 to 104.Each jet all directly impacts base plate 78.Then, after impacting base plate 78, heat transport fluid is discharged by hole 72.
The fluid of discharging from sunk part 36 passes through pipeline 57 guiding sunk parts 48.
In sunk part 48, with the sunk part 36 similar modes of having described, fluid by one or more holes of realizing on the wall 52 before sunk part 50 is discharged, spray with the pattern that is basically perpendicular to switch 7 base plates.
In sunk part 50, heat transport fluid is sprayed with the pattern that is basically perpendicular to switch 7 base plates, arranges to sunk part 38 by pipeline 58 then.
In sunk part 38, heat transport fluid is sprayed with the pattern that is basically perpendicular to base plate 78, discharges by pipeline 59 before returning the heat transport fluid source then.The heat transport fluid source typically comprises a pump, and heat transport fluid is circulated in pipeline 56 to 59.
In view of cold fluid enters by joint 14, so heat transport fluid in the sunk part 36 and the temperature difference between the base plate 78 are greater than the temperature difference between the base plate of fluid in the sunk part 48 and switch 7.In fact, along with the propelling of heat transport fluid in cooling circuit, the temperature of cooling circuit rises.Therefore, the cooling effectiveness height in the sunk part 36, the efficient in the opposite sunk part 38 is lower.Can think that also sunk part 48 is relative medium with the cooling effectiveness in 50.Therefore be appreciated that by sunk part 48 sunk part 36 to be connected on fluid with sunk part 38, make switch 6 consistent with 7 cooling with 50.In fact, switch 6 is effectively cooled off by sunk part 36, and is relatively low by the cooling effect of sunk part 38, and finally this is equivalent to the cooling of mid-efficiency, therefore the cooling that obtains near switch 7 very much.The working condition of groove 30 to 32 can draw from the groove 28 to 29 of firm description.
Fig. 4 illustrates another kind of embodiment, and except plate 42 changed plate 112 into, coldplate 110 was the same with coldplate 4.Plate 112 places in the sunk part 36 in the mode identical with plate 42.In fact, plate 112 only is that with the different of plate 42 hole is realized along an injection direction P who is not orthogonal to the front and back of plate 112.Or rather, in the embodiment of Fig. 4, show five holes 114 to 118.Extend along injection direction P in these holes 114 to 118.In this embodiment, injection direction P forms an angle γ with respect to the direction perpendicular to front 113.Here, angle γ equals-β, makes angle γ between-30 ° and 0 °.
Fig. 5 illustrates another kind of embodiment, and except plate 42 changed plate 132 into, coldplate 120 was the same with coldplate 4.The difference of plate 132 and plate 42 is that mainly it is not flat, but is divided into the plane 134 to 136 that three continuous and limits and edge joint close.
Plane 134 is inclined planes, from extend to half centre position highly between base plate 78 and sunk part 36 bottoms at the line above the hole 70 94.
Plane 135 is planes that are parallel to base plate 78.
At last, plane 136 is another inclined planes, extends to the contact wire 96 that is positioned at 72 belows, hole from basic position intermediate.
Here, have only to be installed with hole 138 to 141 on the horizontal plane 135, constitute spout, can form jet perpendicular to the heat transport fluid of base plate 78.
Many other embodiment can be arranged.For example, the number in the hole of realizing on the plate can be different.Minimum on the plate should have at least two holes, and preferably the number in hole should be more than 20.
As modification, below each electronic power element to be cooled, has only a sunk part.When the input and output joint of heat transport fluid was positioned on the opposed edges of plate 26, this execution mode was suitable especially.On the contrary, the cooling for further unified different electronic power elements can realize plural sunk part at the following of same electronic power element.
Typical heat transport fluid is water.But it also can be mixed liquor or any other heat transport fluid of oil, water and antifreezing agent.
As modification, hole 70 is arranged in the bottom of sunk part, rather than on the sidewall.In this embodiment, angle β and γ-30 ° and+30 ° between.
The cross section in hole can the side of being or arbitrary shape.Particularly, the cross section in each hole can and then dwindle with preceding on the heat transport fluid flow direction.In this case, preferably the area sum of the minimum cross-section in hole equals the horizontal area in hole 70.
The horizontal area in hole 70 or hole 72 not necessarily will equal the summation of the horizontal area of hole or spout.For example, the horizontal area in hole 70 or hole 72 can be 20% to 200% of the horizontal area summation in hole.
What a plurality of heat transport fluids can be set in same sunk part enters hole and/or tap.
In the embodiments described herein, the hole directly constitutes jet nozzle, and needn't add any material.In modification, constitute in pipe insertion each hole onboard of spout.The front and back of plate can be stretched out in the end of each pipe.
1. electronic circuit board has:
-at least one electronic power element (6 to 10), it is furnished with a base plate (78), and base plate is suitable for directly contacting with a heat transport fluid,
-one coldplate (4), with at the fixing base plate of electronic power element (78) of the mode of heat transport fluid sealing, this coldplate has on it:
At least one sunk part (36,38,48,50), its opening lead to below the base plate of electronic power element (6 to 10),
What at least one heat transport fluid entered sunk part enters hole (70), and
At least one heat transport fluid flows out the tap (72) of sunk part,
It is characterized in that coldplate (4) also has:
-one jet tray (42; 112), between entering between hole (70) and the tap (72), and
-a plurality of rectilinear spouts (86 to 90; 114 to 118), run through jet tray along injection direction, along the length of the spout of injection direction more than or equal to Breadth Maximum perpendicular to this unidirectional spout, so that form the jet (100 to 104) of heat transport fluid along injection direction, the injection direction of each spout forms an angle α with respect to direction perpendicular to base plate, this angle α-30 ° and+30 ° between.
2. coldplate is used to support and is furnished with the electronic power element that is suitable for the direct base plate that contacts with heat transport fluid, and the base plate of these electronic power elements is fixed on the coldplate in the mode at the heat transport fluid sealing, and this coldplate has:
It is characterized in that coldplate has:
3. coldplate according to claim 2, wherein, each spout (86 to 90; 114 to 118) all form by a hole passing jet tray (42).
4. according to claim 2 or 3 described coldplates, wherein, jet tray is flat, and the injection direction of each spout is perpendicular to front (80) or back (82) of jet tray, the front of jet tray is the one side towards base plate, and the back is the one side opposite with the front, and jet tray (42) is with respect to angle β of plane inclination of electronic power element base plate, this angle β-30 ° and+30 ° between.
5. according to claim 2 or 3 described coldplates, wherein, coldplate has pipeline (56 to 64), can make heat transport fluid by entering hole (70) and tap (72) circulates, and these pipelines all are positioned at the same plane that is parallel to the plane that base plate limits.
6. according to claim 2 or 3 described coldplates, wherein, coldplate has:
First and second sunk part (36,38), each all has an opening first and second sunk parts, opening lead to the same first electronic power element (6) base plate below,
At least one the 3rd sunk part (48,50) has an opening, opening lead to one second electronic power element (7) base plate below,
The tap (72) of first sunk part (36) enters hole and tap by the 3rd sunk part (48,50), carries out being connected on the fluid with the hole that enters of second sunk part (38).
7. according to claim 2 or 3 described coldplates, wherein, coldplate has at least ten spouts (86 to 90; 114 to 118), layout each other will form the shock point of the heat transport fluid jet (100 to 104) that is evenly distributed on the base plate, and promptly the distance between two adjacent shock points equates all that each other error is approximately 15%.
CN101611492A CN101611492A (en) 2009-12-23
CN101611492B true CN101611492B (en) 2011-03-23
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