CN103855106A - Power conversion device - Google Patents
Power conversion device Download PDFInfo
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- CN103855106A CN103855106A CN201310253137.3A CN201310253137A CN103855106A CN 103855106 A CN103855106 A CN 103855106A CN 201310253137 A CN201310253137 A CN 201310253137A CN 103855106 A CN103855106 A CN 103855106A
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- base portion
- conversion device
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- air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Abstract
The invention relates to a power conversion device capable of reducing thermal inference at power modules at an upstream side of cooling air and at power modules at a downstream side and restrain the air from directly blowing to the power modules at the downstream side. The power conversion device comprises the multiple power modules, a radiator provided with a base portion on which the multiple power modules are arrayed and multiple radiating fins used for cooling the multiple power modules through the base portion, and an air supply portion used for supplying cooling air among the multiple radiating fins along an arraying direction of the multiple power modules. The base portion is formed to rise in a ladder-like mode along an air-supplying direction of cooling air. An opening portion is formed at a step portion.
Description
Technical field
The present invention relates to a kind of power conversion device.
Background technology
The in the situation that of jumbo power conversion device, from the angle of allowable current, multiple power models are configured on radiator, but wish power model to carry out the configuration of neighbour's formula for the miniaturization of heat sink size.For this reason, power model arranged in series in the wind path direction that is arranged at the fan on radiator.
But in the situation that neighbour's formula configures, the heat occurring via radiator between power model is interfered.From upstream (suction side) (exhaust side) temperature rising to downstream of wind path, power model operating temperature produces uneven.
At this, power model has temperature characterisitic, but due to temperature imbalance, fluctuation appears in operating point difference and characteristic.Due to the temperature of power model, more golf calorific value is larger, therefore, is absorbed in vicious circle, causes characteristic further deteriorated.
In patent documentation 1, record the cooling device of following power conversion device, the multiple fin of its configured in series in wind-tunnel, on multiple fin, across heated sheet, semiconductor element is installed respectively, in the cooling device of this power conversion device, wind-tunnel is formed as along with the weather side of the path from wind dwindles towards downwind side.Thus, according to patent documentation 1, can approximate equality the cooling multiple fin in ground, therefore, reduce the difference of the temperature rise value of the semiconductor element of each phase.
In patent documentation 2, record following electronic unit cooling construction, it has base portion, in this base portion, the cooling air being produced by fan towards on be arranged with multiple electronic units, in this electronic unit cooling construction, in base portion, be formed with air vent hole in the mode that separates multiple electronic units.Thus, according to patent documentation 2, owing to cooling air being supplied to cooling fin by air vent hole, therefore, the movement of the heat between multiple electronic units is restricted, and makes the electronic unit that allowable temperature is different to be undertaken cooling by identical cooling fin.
Patent documentation 1: TOHKEMY 2001-25254 communique
Patent documentation 2: TOHKEMY 2010-165761 communique
In the technology of recording in patent documentation 1, in the case of paying close attention to flowing through near the wind (air) heated sheet in wind-tunnel, to via heated sheet and fin and the wind that the heat receiving from the semiconductor element of upstream side keeps, to near near the fin heated sheet of the semiconductor element in downstream, flow through, therefore, may make the semiconductor element of upstream side and the semiconductor element in downstream that heat occur each other via fin interferes.
In the technology of recording in patent documentation 2, due in the time that section is observed, air vent hole tilts in the mode of the electronic unit that approaches downstream, therefore, in air vent hole when air amount, is easy to the wind on electronic unit that formation directly blows to downstream.If wind directly blows on electronic unit, may cause electronic unit generation electrical degradation aspects.
Summary of the invention
The present invention In view of the foregoing proposes, and object is to obtain a kind of power conversion device, and it can reduce the power model of upstream side of cooling air and the heat of the power model in downstream interferes, and can suppress on power model that wind directly blows to downstream.
In order to solve above-mentioned problem and to realize object, 1 related power conversion device of technical scheme of the present invention is characterised in that to have: multiple power models; Radiator, it has and is arranged with the base portion of described multiple power models and via described base portion, described multiple power models is carried out to cooling multiple fin; And air supplying part, its orientation along described multiple power models is by cooling air air-supply between described multiple fin, and described base portion is formed as increasing with stepped along the air supply direction height of cooling air, has peristome in stage portion.
The effect of invention
According to the present invention, owing to locating cold air to import in the space of the power model side between multiple fin before the upstream side of each power model is tight, therefore, the heat that can reduce between the each power model causing via fin is interfered.In addition, owing to forming approx air curtain in the space that can locate before the upstream side of each power model is tight, therefore, can suppress wind and directly blow on power model.That is, can reduce the power model of upstream side of cooling air and the heat of the power model in downstream and interfere, can suppress on power model that wind directly blows to downstream.
Brief description of the drawings
Fig. 1 is the figure that represents the structure of the related power conversion device of execution mode 1.
Fig. 2 is the figure that represents the structure of the related power conversion device of execution mode 1.
Fig. 3 is the figure that represents the flow direction of the air in execution mode 1.
Fig. 4 is the figure that represents the structure of the related power conversion device of execution mode 2.
Fig. 5 is the figure that represents the structure of the related power conversion device of execution mode 2.
Fig. 6 is the figure that represents the flow direction of the air in execution mode 2.
Fig. 7 is the figure that represents the structure of the related power conversion device of execution mode 3.
Fig. 8 is the figure that represents the structure of the related power conversion device of execution mode 4.
Fig. 9 is the figure that represents the flow direction of the air in execution mode 4.
Figure 10 is the figure that represents the structure of the related power conversion device of execution mode 5.
Figure 11 is the figure that represents the structure of the related power conversion device of execution mode 6.
Figure 12 is the figure that represents the structure of the related power conversion device of execution mode 7.
Figure 13 is the figure that represents the structure of the related power conversion device of execution mode 7.
Figure 14 is the figure that represents the structure of the related power conversion device of execution mode 8.
Figure 15 is the figure that represents the structure of the related power conversion device of execution mode 8.
Figure 16 is the figure that represents the structure of the related power conversion device of execution mode 9.
Figure 17 is the figure that represents the structure of the related power conversion device of execution mode 9.
Figure 18 is the figure that represents the characteristic of the semiconductor element in the variation of execution mode 1 to 9.
Figure 19 is the figure that represents the flow direction of the air in comparative example.
The explanation of label
1,1i, 1j, 1p, 1q, 1n, 1r, 1s, 1t power conversion device, 10,10i, 10p radiator, 20 air supplying part, 30i, 30j extraneous gas import road, PM power model.
Embodiment
Based on accompanying drawing, explain the execution mode of power conversion device involved in the present invention below.In addition, the present invention is not limited to present embodiment.
The power conversion device 1 related to execution mode 1 describes.
About the each semiconductor element in inverter, for example, install as being more than or equal to 1 power model.For example, direct current power is converted to the alternating electromotive force of 3 phases at power conversion device 1, in inverter, (for example use 6 transistors mutually corresponding to 3, IGBT or FET etc.), but implement power model respectively mutually in the situation that, need to become 3 power models separately with 2 semiconductor elements each.
Or in the situation that power conversion device 1 is jumbo power conversion device, power conversion device 1 has multiple inverters, by multiple driven load of inverse.For example, in the situation that each inverter is implemented power model respectively, need to become multiple power models separately with multiple semiconductor elements.
Like this, in power conversion device 1, the in the situation that of the multiple power model of needs, because multiple power models are easy to respectively heating, therefore, expect to carry out cooling to multiple power models respectively.Now, multiple power models are configured in the flat base portion in radiator, but wish that in order to realize the miniaturization of heat sink size power model adopts the configuration of neighbour's formula.For this reason, power model arranged in series in the wind path direction that is arranged at the fan on radiator.
But in the situation that neighbour's formula configures, the heat occurring via radiator between power model is interfered.From upstream (suction side) (exhaust side) temperature rising to downstream of wind path, power model operating temperature produces uneven.
Corresponding thereto, for example can consider as shown in figure 19, between multiple power model PM900-1, PM900-2 on base portion BS900, be provided with air vent hole BS900a, make air vent hole BS900a analysing and observe while observing to tilt in the mode of the power model PM900-2 that approaches downstream.In the case, in air vent hole BS900a, when air amount, be easy to form the wind on the power model PM900-2 that directly blows to downstream.If it is upper that wind directly blows to power model PM900-2, may cause power model PM900-2 that electrical degradation aspects occurs.For example, if on the insulator in power model PM900-2 because the generation insulation degradations such as corrosion produce defective insulation, likely cause originally not should conducting position be short-circuited etc.Or, for example, if there is the deteriorated poor flow that produces of conduction because corrosion waits on the electric conductor in power model PM900-2, likely cause former position that should conducting to occur to break etc.As mentioned above, if electrical degradation aspects occurs power model PM900-2, likely there is misoperation in power model PM900-2.
Therefore, in execution mode 1, in power conversion device 1, as shown in Figures 1 and 2, by designing for the structure about radiator, reduce the power model of upstream side of cooling air and the heat of the power model in downstream and interfere and suppress on the power model that wind directly blows to downstream thereby realize.Fig. 1 is the oblique view that represents the structure of power conversion device 1, and Fig. 2 is the end view that represents the structure of power conversion device 1.
Specifically, in power conversion device 1, as shown in Figures 1 and 2, there is multiple power model PM-1 to PM-3, radiator 10 and air supplying part 20.
Multiple power model PM-1 to PM-3 for example form a line along the air supply direction of the cooling air being produced by air supplying part 20.As mentioned above, each power model PM-1 to PM-3 has and is more than or equal to 1 (for example multiple) semiconductor element, is easy to heating in the time that it moves.
As shown in Figure 2, air supplying part 20 is blown cooling air between multiple fin 12 along the orientation of multiple power model PM-1 to PM-3.Air supplying part 20 for example has blowing fan 21, by rotariling actuate blowing fan 21 in the mode that produces inspiratory flow along the direction from left to right in Fig. 2, thereby along the orientation of multiple power model PM-1 to PM-3, cooling air is blown between multiple fin 12.
Now, in radiator 10, as shown in Figures 1 and 2, base portion 11 is formed as increasing with stepped along the air supply direction height of cooling air, has peristome 11b-1,11b-2 on each stage portion 11a-1,11a-2.
For example, multiple fin 12 have respectively air supply direction height along cooling air with the stepped multiple parts that increase.For example, multiple fin 12 are corresponding to multiple power model PM-1 to PM-3, have air supply direction height along cooling air with stepped multiple the 1st fin FIN1-1 to FINk-1 that increase, multiple the 2nd fin FIN1-2 to FINk-2 and multiple the 3rd fin FIN1-3 to FINk-3.In addition, for example, base portion 11 is corresponding to multiple power model PM-1 to PM-3, has air supply direction height along cooling air with stepped the 1st base portion BS-1 increasing, the 2nd base portion BS-2 and the 3rd base portion BS-3.
For example, the lower surface of the 1st fin FIN1-1 to FINk-1, the 2nd fin FIN1-2 to FINk-2 and the 3rd fin FIN1-3 to FINk-3 is being made as under the state of roughly equal height, by at the upper surface of the 1st fin FIN1-1 to FINk-1, the 2nd fin FIN1-2 to FINk-2 and the 3rd fin FIN1-3 to FINk-3, the 1st base portion BS-1, the 2nd base portion BS-2 and the 3rd base portion BS-3 being installed respectively, thereby can make base portion 11 be formed as increasing with stepped along the air supply direction height of cooling air.
In addition, for example the part of exposing the 2nd fin FIN1-2 to FINk-2 and the 3rd fin FIN1-3 to FINk-3 in stage portion 11a-1, the 11a-2 of the 1st base portion BS-1, the 2nd base portion BS-2 and the 3rd base portion BS-3 can be made as to peristome 11b-1,11b-2.That is, each stage portion 11a-1,11a-2 have the wall BS-2a, the BS-3a that are formed by the end of the 2nd base portion BS-2 or the 3rd base portion BS-3 at upside, and, there is peristome 11b-1,11b-2 at downside.
In addition, preferably the width along in the width in the direction of base portion 11 and the direction vertical with base portion 11 of peristome 11b-1,11b-2 is made as to following size,, the temperature imbalance between each power model PM-1 to PM-3 can be decreased to the size minimum that is less than or equal to high limit of tolerance level and makes radiator 10.
Next, use Fig. 2 that the action of power conversion device 1 is described.In Fig. 2, dot cold air, represent hot-air with solid line.
Lower side in Fig. 2 is initially cold air towards the air shown in right-hand arrow, but receive power model PM-1 heat and after heating, as thermal air current to blowing fan 21.In addition, the air that the peristome 11b-1 of the stage portion 11a-1 from Fig. 2 imports is initially cold air, but receive power model PM-2 heat and after heating, as thermal air current to blowing fan 21.In addition, the air that the peristome 11b-2 of the stage portion 11a-2 from Fig. 2 imports is initially cold air, but receive power model PM-3 heat and after heating, as thermal air current to blowing fan 21.Like this, by being configured to, make base portion 11 be formed as increasing with stepped along the air supply direction height of cooling air, in each stage portion 11a-1,11a-2, there is peristome 11b-1,11b-2, thereby can before the upstream side of each power model PM-1 to PM-3 tight, locate cold air to import in the space of power model PM-1 to the PM-3 side between multiple fin 12, the heat that therefore, can reduce between each power model PM-1 to PM-3 is interfered.
Next, use Fig. 3, near air flow peristome 11b-1,11b-2 is described.Fig. 3 is the figure that represents near the air flow of peristome 11b-1 with illustrating.
For example, as shown in Figure 3, at the peristome 11b-1 from stage portion 11a-1, between the 2nd fin FIN1-2 to FINk-2 when air amount, the air of the top of peristome 11b-1 flows along the BS-2a of wall portion to vertical lower.That is, work approx in the region that single-point line is surrounded as air curtain (air curtain) AC, the air curtain AC in the front by power model PM-2 can Occlusion Map 3 in from left side towards the mobile air of the power model PM-2 in downstream.Like this, by being configured to, make base portion 11 be formed as increasing with stepped along the air supply direction height of cooling air, in each stage portion 11a-1,11a-2, there is peristome 11b-1,11b-2, thereby can in the space immediately front of the upstream side of each power model PM-1 to PM-3, form approx air curtain AC, therefore, can suppress wind directly blows on power model PM-2.
As mentioned above, in execution mode 1, in power conversion device 1, base portion 11 is formed as increasing with stepped along the air supply direction height of cooling air, has peristome 11b-1,11b-2 on stage portion 11a-1,11a-2.Thus, owing to locating cold air to import in the space of power model PM-1 to the PM-3 side between multiple fin 12 before the upstream side of each power model PM-1 to PM-3 tight, the heat that therefore, can reduce between the each power model PM-1 to PM-3 causing via fin 12 is interfered.In addition, owing to forming approx air curtain AC in the space immediately front of the upstream side of each power model PM-1 to PM-3, therefore, can suppress wind and directly blow on power model PM-2.That is, can reduce the power model of upstream side of cooling air and the heat of the power model in downstream and interfere, can suppress on power model that wind directly blows to downstream.Therefore, can realize by neighbour's formula configuration of multiple power model PM-1 to PM-3 the raising of the miniaturization of radiator 10 sizes and the Reliability of Microprocessor of power conversion device 1.
In addition, in execution mode 1, between multiple power model PM-1 to PM-3 that base portion 11 is arranged at the air supply direction along cooling air, there is peristome 11b-1, the 11b-2 of stage portion 11a-1,11a-2.Thus, can before the upstream side of each power model PM-1 to PM-3 tight, locate cold air to import in the space of power model PM-1 to the PM-3 side between multiple fin 12, can in the space immediately front of the upstream side of each power model PM-1 to PM-3, form approx air curtain AC.
In addition, the each semiconductor element in each power model PM-1 to PM-3 is for example formed by semiconductor, for example, can be formed by silicon or GaAs.
In addition, can replace blowing fan 21 and have a following fan in air supplying part 20, this fan arrangement, at the upstream side of multiple fin 12, produces from upstream side the exhaust stream towards downstream between multiple fin 12.
In addition, in execution mode 1, illustrate for 3 power model PM-1 to PM-3, but the number of power model also can be 2, also can be for being more than or equal to 4.
Next, the related power conversion device 1i of execution mode 2 is described.Below, the situation that is 2 to multiple power model PM-1, PM-2 illustrates, and describes around the part different from execution mode 1.
In execution mode 1, realize by forming approx air curtain AC the inhibition that wind is directly blown to this situation on power model, but in execution mode 2, by being provided for being difficult to from wind the extraneous gas importing road of the position importing extraneous gas that directly blows to power model, thereby directly being blown to this situation on power model, suppresses wind.
Specifically, as shown in Figures 4 and 5, in power conversion device 1i, replace radiator 10 and there is radiator 10i, and there is extraneous gas and import road 30i.Fig. 4 is the figure that represents the structure that the power conversion device 1i under the state before extraneous gas importing road 30i is installed, and Fig. 5 is the figure that represents the structure that the power conversion device 1i under the state after extraneous gas importing road 30i is installed.
For example multiple fin 12i have respectively equal height along the air supply direction of cooling air.For example multiple fin 12i have multiple the 1st fin FIN1-1i to FINk-1i, and they have equal height along the air supply direction of cooling air.In addition, for example base portion 11i has the 1st base portion BS-1i, and the 1st base portion BS-1i has equal height along the air supply direction of cooling air.
For example, by the upper surface at the 1st fin FIN1-1i to FINk-1i, the 1st base portion BS-1i is installed, thereby can forms base portion 11i in the mode along the air supply direction of cooling air with equal height.On this base portion 11i, peristome 11b-1i is set.
In addition, preferably the width in the width in the orientation of multiple power model PM-1, PM-2 of peristome 11b-1i and the direction vertical with orientation is made as to for example following size,, the temperature imbalance between each power model PM-1, PM-2 can be decreased to the size minimum that is less than or equal to high limit of tolerance level and makes radiator 10i.
Extraneous gas imports road 30i and covers peristome 11b-1i in the mode via peristome 11b-1i, extraneous gas being directed between multiple fin 12i from multiple fin 12i sides.
Specifically, as shown in Figure 5, extraneous gas imports road 30i to be had: the 1st 31i of portion, the 2nd 32-1i of portion, 32-2i and the 3rd 33-1i of portion, 33-2i.The 1st 31i of portion with from outer side covers peristome 11b-1i(with reference to Fig. 4) and extend away from the mode of base portion 11i.For example, the 1st 31i of portion, in the case of from having an X-rayed perpendicular to the direction of base portion 11i, extends in the mode of surrounding peristome 11b-1i.In addition, for example the 1st 31i of portion be in the case of from observing along the direction of base portion 11i, in the mode away from base portion 11i, for example, extends to specific power module PM-1, position that PM-2 is high from the position that covers peristome 11b-1i.
The 2nd 32-1i of portion, 32-2i are communicated with the 1st 31i of portion, extend to the outside of base portion 11i of overlooking while observing along base portion 11i.The 2nd 32-1i of portion, 32-2i are for example along extending in base portion 11i and the direction crossing with the orientation of power model PM-1, PM-2.For example, one end of the 2nd 32-1i of portion the 1st 31i of portion the direction crossing with the orientation of power model PM-1, PM-2 extends to the outside of overlooking the base portion 11i while observation.The 2nd 32-1i of portion is communicated with the 1st 31i of portion at one end place of the 1st 31i of portion.For example, the other end of the 2nd 32-2i of portion the 1st 31i of portion the direction crossing with the orientation of power model PM-1, PM-2 extends to the outside of overlooking the base portion 11i while observation.The 2nd 32-2i of portion is communicated with the 1st 31i of portion at the other end place of the 1st 31i of portion.
The 3rd 33-1i of portion, 33-2i are communicated with the 2nd 32-1i of portion, 32-2i, extend in the lateral of base portion 11i multiple fin 12i side.The 3rd 33-1i of portion, 33-2i for example for example, extend to multiple fin 12i sides in the direction of crossing with base portion 11i (vertical).Position (with reference to Fig. 6 (a)) lower compared with upper surface base portion 11i for example, when, the 3rd 33-1i of portion extends to side-looking and observe from one end that is communicated with the opposition side of side with the 1st 31i of portion of the 2nd 32-1i of portion.The 3rd 33-1i of portion is communicated with the 2nd 32-1i of portion at one end place of the 2nd 32-1i of portion.Position (with reference to Fig. 6 (a)) lower compared with upper surface base portion 11i for example, when, the 3rd 33-2i of portion extends to side-looking and observe from one end that is communicated with the opposition side of side with the 1st 31i of portion of the 2nd 32-2i of portion.The 3rd 33-2i of portion is communicated with the 2nd 32-2i of portion at one end place of the 2nd 32-2i of portion.The 3rd 33-1i of portion, 33-2i have the opening for importing extraneous gas in one end of multiple fin 12i sides respectively.
Next, use Fig. 6 (a) and (b) to describe the action of power conversion device 1i.Fig. 6 (a) mainly represents the outside air flow of radiator 10i, and Fig. 6 (b) mainly represents the air flow of the inside of radiator 10i.In Fig. 6 (a) and (b), dot cold air, represent hot-air with solid line.
Lower side in Fig. 6 (b) is initially cold air towards the air shown in right-hand arrow, but receive power model PM-1 heat and after heating, as thermal air current to blowing fan 21.In addition, import road 30i and the air that imports from outside is initially cold air via extraneous gas in Fig. 6 (b), but receive power model PM-2 heat and after heating, as thermal air current to blowing fan 21.Like this, by being configured to, extraneous gas is set and imports road 30i, import road 30i via extraneous gas and import extraneous gas to the peristome 11b-1i between multiple power model PM-1, PM-2, thereby can before the upstream side of each power model PM-1, PM-2 tight, locate cold air to import in the space of the power model PM-1 between multiple fin 12i, PM-2 side, the heat that therefore, can reduce between each power model PM-1, PM-2 is interfered.
In addition, for example as shown in Figure 6 (a), when import road 30i suction extraneous gas from extraneous gas, the front end (one end of multiple fin 12i sides of the 3rd 33-1i of portion, 33-2i) that extraneous gas imports road 30i is positioned at for example lower than the upper surface 11ia of base portion 11i position, therefore, can be by the space boundary of the formation air draught of radiator 10i outside compared with double dot dash line more on the lower in the space of side.Thus, can suppress the generation of the air draught in the space of more top side compared with double dot dash line, therefore, can suppress wind and directly blow on power model PM-1, PM-2.
As mentioned above, in execution mode 2, extraneous gas imports road 30i and covers peristome 11b-1i in the mode via peristome 11b-1i, extraneous gas being directed between multiple fin 12i from multiple fin 12i sides.Thus, can be difficult to directly blow to from wind the position importing extraneous gas of power model PM-1, PM-2, can suppress wind and directly blow on power model PM-1, PM-2.
In addition, in execution mode 2, import in the 30i of road at extraneous gas, the 1st 31i of portion is to extend from outer side covers peristome 11b-1i and away from the mode of base portion 11i.The 2nd 32-1i of portion, 32-2i are communicated with the 1st 31i of portion, extend to the outside of base portion 11i of overlooking while observing along base portion 11i.The 3rd 33-1i of portion, 33-2i are communicated with the 2nd 32-1i of portion, 32-2i, extend in the lateral of base portion 11i multiple fin 12i side.Thus, can in covering peristome 11b-1i, extraneous gas be directed between multiple fin 12i via peristome 11b-1i from multiple fin 12i sides.
Next, the related power conversion device 1j of execution mode 3 is described.Below, describe around the part different from execution mode 1.
In execution mode 1, realize by forming approx air curtain AC the inhibition that wind is directly blown to this situation on power model, but in execution mode 3, by being provided for being difficult to from wind the extraneous gas importing road of the position importing extraneous gas that directly blows to power model, thereby directly being blown to this situation on power model, suppresses wind.
Specifically, as shown in Figure 7, power conversion device 1j also has extraneous gas and imports road 30j-1,30j-2.Fig. 7 is the figure that represents the structure that the power conversion device 1j under the state after extraneous gas importing road 30j-1,30j-2 is installed.
Extraneous gas import road 30j-1,30j-2 with from multiple fin 12 sides via peristome 11b-1,11b-2(with reference to Fig. 1) by extraneous gas between multiple fin 12 import mode cover peristome 11b-1,11b-2.
Specifically, as shown in Figure 7, extraneous gas imports road 30j-1,30j-2 to be had: the 1st 31j of portion, the 2nd 32-1j of portion, 32-2j and the 3rd 33-1j of portion, 33-2j.The 1st 31j of portion with from outer side covers peristome 11b-1,11b-2(with reference to Fig. 1) and extend along the mode of base portion 11.For example, the 1st 31j of portion, in the case of from the orientation of multiple power model PM-1 to PM-3 is had an X-rayed, extends in the mode of surrounding peristome 11b-1,11b-2.In addition, for example the 1st 31j of portion is in the case of from observing perpendicular to the direction of base portion 11,, in the mode along base portion 11 for example, extend to and be positioned near of power model PM-1, PM-2 and the position of downstream more compared with power model PM-1, PM-2 from the position that covers peristome 11b-1,11b-2.
The 2nd 32-1j of portion, 32-2j are communicated with the 1st 31j of portion, extend to the outside of base portion 11 of overlooking while observing along base portion 11.The 2nd 32-1j of portion, 32-2j are for example along extending in base portion 11 and the direction crossing with the orientation of power model PM-1 to PM-3.For example, one end of the 2nd 32-1j of portion the 1st 31j of portion the direction crossing with the orientation of power model PM-1 to PM-3 extends to the outside of overlooking the base portion 11 while observation.The 2nd 32-1j of portion is communicated with the 1st 31j of portion at one end place of the 1st 31j of portion.For example, the other end of the 2nd 32-2j of portion the 1st 31j of portion the direction crossing with the orientation of power model PM-1 to PM-3 extends to the outside of overlooking the base portion 11 while observation.The 2nd 32-2j of portion is communicated with the 1st 31j of portion at the other end place of the 1st 31j of portion.
The 3rd 33-1j of portion, 33-2j are communicated with the 2nd 32-1j of portion, 32-2j, and in the lateral of base portion 11, multiple fin 12 sides are extended.The 3rd 33-1j of portion, 33-2j for example for example, extend to multiple fin 12 sides in the direction of crossing with base portion 11 (vertical).Position (with reference to Fig. 6 (a)) lower compared with upper surface base portion 11 for example, when, the 3rd 33-1j of portion extends to side-looking and observe from one end that is communicated with the opposition side of side with the 1st 31j of portion of the 2nd 32-1j of portion.The 3rd 33-1j of portion is communicated with the 2nd 32-1j of portion at one end place of the 2nd 32-1j of portion.Position (with reference to Fig. 6 (a)) lower compared with upper surface base portion 11 for example, when, the 3rd 33-2j of portion extends to side-looking and observe from one end that is communicated with the opposition side of side with the 1st 31j of portion of the 2nd 32-2j of portion.The 3rd 33-2j of portion is communicated with the 2nd 32-2j of portion at one end place of the 2nd 32-2j of portion.The 3rd 33-1j of portion, 33-2j have the opening for importing extraneous gas in one end of multiple fin 12 sides respectively.
Next,, due to identical with the action of execution mode 2, therefore, use Fig. 6 (a) and (b) to describe the action of power conversion device 1j.
Lower side in Fig. 6 (b) is initially cold air towards the air shown in right-hand arrow, but receive power model PM-1 heat and after heating, as thermal air current to blowing fan 21.In addition, import road 30j-1 and the air that imports from outside is initially cold air via extraneous gas in Fig. 6 (b), but receive power model PM-2 heat and after heating, as thermal air current to blowing fan 21.In addition, although not shown, via extraneous gas import road 30j-2 and from outside import air be initially cold air, but receive power model PM-3 heat and after heating, as thermal air current to blowing fan 21.Like this, by being configured to, extraneous gas is set and imports road 30j-1,30j-2, import road 30j-1,30j-2 via extraneous gas and import extraneous gas to peristome 11b-1,11b-2 between multiple power model PM-1 to PM-3, thereby can before the upstream side of each power model PM-1 to PM-3 tight, locate cold air to import in the space of power model PM-1 to the PM-3 side between multiple fin 12, the heat that therefore, can reduce between each power model PM-1 to PM-3 is interfered.
In addition, for example as shown in Figure 6 (a), when import road 30j-1,30j-2 suction extraneous gas from extraneous gas, the front end (one end of multiple fin 12 sides of the 3rd 33-1j of portion, 33-2j) that extraneous gas imports road 30j-1,30j-2 is positioned at for example lower than the upper surface of base portion 11 position, therefore, can be by the space boundary of the formation air draught of radiator 10j outside compared with double dot dash line more on the lower in the space of side.Thus, can suppress the generation of the air draught in the space of more top side compared with double dot dash line, therefore, can suppress wind and directly blow on power model PM-1 to PM-3.
As mentioned above, in execution mode 3, extraneous gas imports road 30j-1,30j-2 and covers peristome 11b-1,11b-2 in the mode via peristome 11b-1,11b-2, extraneous gas being directed between multiple fin 12 from multiple fin 12 sides.Thus, can be difficult to directly blow to from wind the position importing extraneous gas of power model PM-1 to PM-3, can suppress wind and directly blow on power model PM-1 to PM-3.
In addition, in execution mode 3, base portion 11 is formed as increasing with stepped along the air supply direction height of cooling air, has peristome 11b-1,11b-2 on stage portion 11a-1,11a-2.Thus, import road 30j-1,30j-2 for each extraneous gas, can between multiple fin 12, import extraneous gas via peristome 11b-1, the 11b-2 of differing heights, heat between the extraneous gas that therefore, can also suppress to import via extraneous gas importing road 30j-1,30j-2 is interfered.
In addition, in execution mode 3, import in road 30j-1,30j-2 at extraneous gas, the 1st 31j of portion is to extend from outer side covers peristome 11b-1 and along the mode of base portion 11.The 2nd 32-1j of portion, 32-2j are communicated with the 1st 31j of portion, extend to the outside of base portion 11 of overlooking while observing along base portion 11.The 3rd 33-1j of portion, 33-2j are communicated with the 2nd 32-1j of portion, 32-2j, and in the lateral of base portion 11, multiple fin 12 sides are extended.Thus, can in covering peristome 11b-1,11b-2, extraneous gas be directed between multiple fin 12 via peristome 11b-1,11b-2 from multiple fin 12 sides.
Execution mode 4
Next, the related power conversion device 1p of execution mode 4 is described.Below, the situation that is 2 for multiple power model PM-1, PM-2 illustrates, and, describe around the part different from execution mode 1.
In execution mode 1, by radiator being made as stepped and forming peristome in stage portion, thereby import extraneous gas in each power model, but in execution mode 4, by for each power model, radiator being cut apart and formed gap, thereby extraneous gas is imported in each power model.
Specifically, as shown in Figure 8, in power conversion device 1p, replace radiator 10(with reference to Fig. 1) and there is radiator 10p.Radiator 10p has the multiple radiator body 13-1p, the 13-2p that separate each other corresponding to multiple power model PM-1, PM-2.Multiple radiator body 13-1p, 13-2p for example, to configure the mode of 1 power model PM-1, PM-2 on 1 radiator body 13-1p, 13-2p, carry out corresponding with multiple power model PM-1, PM-2.Multiple radiator body 13-1p, 13-2p leave to each other clearance G P along the air supply direction of cooling air and are configured.Multiple radiator body 13-1p, 13-2p for example have clearance G P between multiple power model PM-1, PM-2.
In addition, preferably the width in the orientation of multiple power model PM-1, PM-2 of clearance G P is made as to following size,, for example the temperature imbalance between each power model PM-1, PM-2 can be decreased to the size minimum that is less than or equal to high limit of tolerance level and makes radiator 10p.
Each radiator body 13-1p, 13-2p for example have mutually the same shape and size.Each radiator body 13-1p, 13-2p for example have base portion 11p and multiple fin 12p.In radiator body 13-1p, 13-2p, as shown in Figure 8, base portion 11p is formed flatly along the air supply direction of cooling air.
For example multiple fin 12p have respectively equal height along the air supply direction of cooling air.For example multiple fin 12p have multiple the 1st fin FIN1-1p to FINk-1p, and they have equal height along the air supply direction of cooling air.In addition, for example base portion 11p has the 1st base portion BS-1p, and the 1st base portion BS-1p has equal height along the air supply direction of cooling air.
For example, by the upper surface at the 1st fin FIN1-1p to FINk-1p, the 1st base portion BS-1p is installed, thereby can forms base portion 11p in the mode along the air supply direction of cooling air with equal height.
Next, use Fig. 9 to describe the action of power conversion device 1p.Fig. 9 is the figure that represents the flow direction of the air in power conversion device 1p.In Fig. 9, dot cold air, represent hot-air with solid line.
Lower side in Fig. 9 is initially cold air towards the air shown in right-hand arrow, but receive power model PM-1 heat and after heating, as thermal air current to blowing fan 21.In addition, the air that clearance G P from Fig. 9 imports is initially cold air, but receive power model PM-2 heat and after heating, as thermal air current to blowing fan 21.Like this, by being configured to, radiator 10p is cut apart between multiple power model PM-1, PM-2 and formed multiple radiator body 13-1p, 13-2p, between multiple radiator body 13-1p, 13-2p, there is clearance G P, thereby can before the upstream side of each power model PM-1, PM-2 tight, locate cold air to import in the space of the power model PM-1 between multiple fin 12, PM-2 side, the heat that therefore, can reduce between each power model PM-1, PM-2 is interfered.
Next, near the air flow of to clearance G P describes.
For example, as shown in Figure 9, between the 1st fin FIN1-1p to FINk-1p from clearance G P to radiator body 13-2p when air amount, the situation shown in air and Fig. 3 of the top of clearance G P similarly, along the BS-1pa(of wall portion with reference to Fig. 8) flow to vertical lower.That is, work approx in the region that single-point line is surrounded as air curtain AC, the air curtain AC in the front by power model PM-2 can Occlusion Map 3 in from left side towards the mobile air of the power model PM-2 in downstream.Like this, by being configured to, radiator 10p is cut apart between multiple power model PM-1, PM-2 and formed multiple radiator body 13-1p, 13-2p, between multiple radiator body 13-1p, 13-2p, there is clearance G P, thereby can in the space immediately front of the upstream side of each power model PM-1 to PM-3, form approx air curtain AC, therefore, can suppress wind directly blows on power model PM-2.
As mentioned above, in execution mode 4, radiator 10p has the multiple radiator body 13-1p, the 13-2p that separate each other corresponding to multiple power model PM-1, PM-2.Multiple radiator body 13-1p, 13-2p leave each other clearance G P along the air supply direction of cooling air and are configured.Thus, can before the upstream side of each power model PM-1, PM-2 tight, locate cold air to import in the space of the power model PM-1 between multiple fin 12p, PM-2 side, the heat that therefore, can reduce between each power model PM-1, the PM-2 causing via fin 12p is interfered.In addition, owing to forming approx air curtain AC in the space immediately front of the upstream side of each power model PM-1, PM-2, therefore, can suppress on power model PM-2 that wind directly blows to downstream.That is, can reduce the power model of upstream side of cooling air and the heat of the power model in downstream and interfere, can suppress on power model that wind directly blows to downstream.
In addition, in execution mode 4, multiple radiator body 13-1p, 13-2p, to configure the mode of 1 power model PM-1, PM-2 on 1 radiator body 13-1p, 13-2p, carry out corresponding with multiple power model PM-1, PM-2., radiator 10p cut apart between multiple power model PM-1, PM-2 and formed multiple radiator body 13-1p, 13-2p.Thus, can before the upstream side of each power model PM-1, PM-2 tight, locate cold air to import in the space of the power model PM-1 between multiple fin 12p, PM-2 side, can in the space immediately front of the upstream side of each power model PM-1, PM-2, form air curtain AC.
In addition, in execution mode 4, multiple radiator body 13-1p, 13-2p are of similar shape and size.Thus, processing charges/fee of material of radiator 10p can be reduced, the manufacturing cost of power conversion device 1p can be reduced.
Execution mode 5
Next, the related power conversion device 1q of execution mode 5 is described.Below, describe around the part different from execution mode 4.
In execution mode 4, be I shape roughly at side-looking gap observing time GP, but in execution mode 5, be V-arrangement shape roughly at side-looking gap observing time GP1.
Specifically, as shown in figure 10, in each radiator body 13-1q, the 13-2q of power conversion device 1q, multiple fin 12q become structure as shown in figure 10.Figure 10 is the end view that represents the structure of power conversion device 1q.For example multiple the 1st fin FIN1-1q to FINk-1q are formed as respectively along with increasing gradually away from base portion 11p width.; in the time that side-looking is observed; multiple the 1st fin FIN1-1q to FINk-1q have respectively roughly trapezoidal shape, and this trapezoidal shape makes each the 1st fin FIN1-1p to FINk-1p(with reference to Fig. 9) mode that upstream rolls oblique taper (taper) near the part top in downstream in Figure 10 shown in broken circle to have cuts off and forms.Thus, be formed as roughly V-arrangement shape at side-looking gap observing time GP.Thus, can easily the air importing from clearance G P be imported to (with reference to Figure 10) to the space of the power model PM-1 between multiple fin 12q, PM-2 side.
As mentioned above, in execution mode 5, the clearance G P1 between multiple radiator body 13-1q, 13-2q in the case of having roughly V-arrangement shape from the direction vertical with the air supply direction of cooling air observed.Thus, can easily the air importing from clearance G P be imported to the space of the power model PM-1 between multiple fin 12q, PM-2 side, the heat that can easily reduce between each power model PM-1, the PM-2 causing via fin 12p is interfered.
Execution mode 6
Next, the related power conversion device 1n of execution mode 6 is described.Below, describe around the part different from execution mode 4.
In execution mode 4, be I shape roughly at side-looking gap observing time GP, but in execution mode 6, be inverted V-shaped shape roughly at side-looking gap observing time GP1.
Specifically, as shown in figure 11, in each radiator body 13-1n, the 13-2n of power conversion device 1n, multiple fin 12n become structure as shown in figure 11.Figure 11 is the end view that represents the structure of power conversion device 1n.For example multiple the 1st fin FIN1-1n to FINk-1n are formed as respectively along with reducing gradually away from base portion 11p width.Thus, be inverted V-shaped shape roughly at side-looking gap observing time GP2.; in the time that side-looking is observed; multiple the 1st fin FIN1-1n to FINk-1n have respectively roughly the isosceles-trapezium-shaped of falling, and the isosceles-trapezium-shaped of should falling makes each the 1st fin FIN1-1p to FINk-1p(with reference to Fig. 9) mode that rolls oblique taper near the part bottom of upstream and downstream both sides in Figure 11 shown in broken circle to have respectively downstream upwards cuts off and forms.Thus, as shown in the arrow of Figure 11 hollow core dotted line, the position that can be difficult to directly to blow to power model at wind imports air from clearance G P2 between multiple fin 12n.
As mentioned above, in execution mode 6, the clearance G P2 between multiple radiator body 13-1n, 13-2n in the case of having roughly V-arrangement shape from the direction vertical with the air supply direction of cooling air observed.Thus, the position that can be difficult to directly blow to power model PM-1, PM-2 at wind, from clearance G P2 importing extraneous gas, can further suppress wind and directly blow on power model PM-1, PM-2.
In addition, in execution mode 6, multiple fin 12n have respectively roughly isosceles-trapezium-shaped.Thus, without the configuration volume that increases radiator 10n, can improve by multiple fin 12n the thermal diffusion effect of power model PM-1, PM-2.
Execution mode 7
Next, the related power conversion device 1r of execution mode 7 is described.Below, describe around the part different from execution mode 4.
In execution mode 4, the base portion of multiple radiator bodies in separately and the position relationship between fin are identical, but in execution mode 7, make the position relationship between base portion and fin change between multiple radiator bodies.
Specifically, as shown in figure 12, in the radiator 10r of power conversion device 1r, the position relationship between the base portion 11r in radiator body 13-1r and multiple fin 12r is different from the position relationship between the base portion 11r in radiator body 13-2r and multiple fin 12r.For example, position relationship between the base portion 11r in radiator body 13-1r and multiple fin 12r is contrary with the position relationship between the base portion 11r in radiator body 13-2r and multiple fin 12r.Thus, multiple power model PM-1, PM-2 are for example arranged in, on different face (right flank, left surface, above not coplanar) at upstream and downstream with respect to the air-supply space of cooling air.
As mentioned above, in execution mode 7, in multiple radiator bodies, between adjacent radiator body, base portion is different with the position relationship of multiple heat radiation lamellar bodies.The heat that can reduce between the power model of the upstream side causing via adjacent radiator body and the power model in downstream thus, is interfered.
Execution mode 8
Next, the related power conversion device 1s of execution mode 8 is described.Below, describe around the part different from execution mode 4.
In execution mode 4, the position that forms clearance G P between multiple radiator bodies is not arranged to restriction especially, but in execution mode 8, the position that forms clearance G P ' is provided with to restriction.
Specifically, power conversion device 1s also has demarcation strip 50s-1,50s-2.Demarcation strip 50s-1,50s-2 are for example from the multiple radiator body 13-1p of sandwich, 13-2p.Each demarcation strip 50s-1,50s-2 at multiple fin 12p(with reference to Fig. 8) side covers multiple radiator body 13-1p, 13-2p from side.For example demarcation strip 50s-1 covers multiple radiator body 13-1p, 13-2p in multiple fin 12p sides from the 1st side.In addition, demarcation strip 50s-2 in multiple fin 12p sides from covering multiple radiator body 13-1p, 13-2p with the 2nd side of the 1st opposition side, side.Thus, the clearance G P(between multiple radiator body 13-1p, 13-2p is with reference to Fig. 9) be constrained to the clearance G P ' on top.Now, demarcation strip 50s-1,50s-2 can double as framework.
As mentioned above, in execution mode 8, demarcation strip 50s-1,50s-2 cover multiple radiator body 13-1p, 13-2p in multiple fin 12p sides from side.Thus, can easily the air importing from clearance G P ' be imported to the space of the power model PM-1 between multiple fin 12q, PM-2 side, the heat that can easily reduce between each power model PM-1, the PM-2 causing via fin 12p is interfered.
In addition, in execution mode 8, demarcation strip 50s-1,50s-2 can double as framework.Thus, append parts owing to not producing, therefore, can be with low cost fabrication power conversion device 1s.
Execution mode 9
Next, the related power conversion device 1t of execution mode 9 is described.Below, describe around the part different from execution mode 8.
In execution mode 8, the downside of the clearance G P in execution mode 4 is provided with to restriction, but in execution mode 9, also the upper end side of clearance G P is provided with to restriction.
Specifically, power conversion device 1s also has the 2nd demarcation strip 60t-1,60t-2.Part to the power model PM-1 in the clearance G P ' of multiple radiator body 13-1p, 13-2p, PM-2 side of the 2nd demarcation strip 60t-1,60t-2 (clearance G P ' in the part of upper end side) covers.In addition, spaced apart by the space of multiple power model PM-1, PM-2 side and multiple fin 12p sides of the 2nd demarcation strip 60t-1,60t-2., clearance G P ' is constrained to the clearance G P between demarcation strip 50s-1,50s-2 and the 2nd demarcation strip 60t-1,60t-2 ".Thus, can be by the space boundary of the formation air draught of radiator 10p outside compared with the 2nd demarcation strip 60t-1,60t-2 more on the lower in the space of side.Thus, can suppress the generation of the air draught in the space of more top side compared with the 2nd demarcation strip 60t-1,60t-2, therefore, can suppress wind and directly blow on power model PM-1, PM-2.
As mentioned above, in execution mode 9, the 2nd demarcation strip 60t-1,60t-2 cover the part of the power model PM-1 in the clearance G P ' of multiple radiator body 13-1p, 13-2p, PM-2 side, and, spaced apart by the space of multiple power model PM-1, PM-2 side and multiple fin 12p sides.Thus, can suppress the generation of the air draught in the space of more top side compared with the 2nd demarcation strip 60t-1,60t-2, therefore, can suppress wind and directly blow on power model PM-1, PM-2.
In addition, at above-mentioned execution mode 1 to execution mode 9, can for example, form this situation by for example common semiconductor (silicon or GaAs) to the each semiconductor element in each power model and illustrate, but also can replace common semiconductor and form each semiconductor element by wide band gap semiconducter.Wide band gap semiconducter is for example to use SiC, gallium nitrate kind material or diamond and the semiconductor that forms etc.
In the case of being formed by wide band gap semiconducter the each semiconductor element in each power model, for example, for SiC, as shown in figure 18, in the time comparing with identical operating current, can make loss lower, therefore, can reduce the caloric value producing under identical operating current, each power model closer can be configured on radiator.; form the each semiconductor element in each power model with wide band gap semiconducter; and; according to above-mentioned execution mode 1 to execution mode 9; by changing the cooling characteristics of giving to SiC device, can further reduce temperature imbalance, therefore; can be for the power model of low-loss of having given full play to SiC, realize the raising of further proximity configuration and Reliability of Microprocessor.
Industrial applicibility
As mentioned above, power conversion device involved in the present invention is effective in power model cooling.
Claims (13)
1. a power conversion device, is characterized in that, has:
Multiple power models;
Radiator, it has and is arranged with the base portion of described multiple power models and via described base portion, described multiple power models is carried out to cooling multiple fin; And
Air supplying part, its orientation along described multiple power models blows cooling air between described multiple fin,
Described base portion is formed as increasing with stepped along the air supply direction height of cooling air, has peristome in stage portion.
2. power conversion device according to claim 1, is characterized in that,
Between described multiple power models that described base portion is arranged at the air supply direction along cooling air, there is the described peristome of described stage portion.
3. a power conversion device, is characterized in that, has:
Multiple power models;
Radiator, it has and is arranged with the base portion of described multiple power models and via described base portion, described multiple power models is carried out to cooling multiple fin, and described base portion has peristome between described multiple power models;
Air supplying part, its orientation along described multiple power models blows cooling air between described multiple fin; And
Extraneous gas imports road, and it is to cover described peristome by extraneous gas from the mode importing between multiple fin described in described multiple fin side direction via described peristome.
4. power conversion device according to claim 3, is characterized in that,
Described extraneous gas imports road to be had:
The 1st portion, it is from peristome described in outer side covers extension;
The 2nd portion, it is communicated with described the 1st portion, extends to the outside of described base portion of overlooking while observing along described base portion;
The 3rd portion, it is communicated with described the 2nd portion, extends in multiple fin sides described in the lateral of described base portion.
5. according to the power conversion device described in claim 3 or 4, it is characterized in that,
Described base portion is formed as increasing with stepped along the air supply direction height of cooling air, has described peristome in stage portion.
6. a power conversion device, is characterized in that, has:
Multiple power models;
Radiator, it has and is arranged with the base portion of described multiple power models and via described base portion, described multiple power models is carried out to cooling multiple fin; And
Air supplying part, its orientation along described multiple power models blows cooling air between described multiple fin,
Described radiator has multiple radiator bodies, and they separate each other corresponding to described multiple power models,
Described multiple radiator body is configured to leave each other gap along the air supply direction of cooling air.
7. power conversion device according to claim 6, is characterized in that,
It is corresponding with described multiple power models that described multiple radiator body is configured in 1 mode on radiator body with 1 power model.
8. according to the power conversion device described in claim 6 or 7, it is characterized in that,
Described gap has roughly V-arrangement shape in the time that the direction from vertical with the air supply direction of cooling air is observed.
9. according to the power conversion device described in claim 6 or 7, it is characterized in that,
Described gap has roughly inverted V-shaped shape in the time that the direction from vertical with the air supply direction of cooling air is observed.
10. according to the power conversion device described in claim 6 or 7, it is characterized in that,
Described multiple radiator body has separately:
Matrix, allocating power module on it; And
Multiple heat radiation lamellar bodies, they carry out cooling to described power model via described matrix,
In described multiple radiator bodies, between adjacent radiator body, described matrix is different with the position relationship of described multiple heat radiation lamellar bodies.
11. according to the power conversion device described in claim 6 or 7, it is characterized in that,
Power conversion device also has demarcation strip, and demarcation strip covers described multiple radiator bodies from side in described multiple fin sides.
12. power conversion devices according to claim 11, is characterized in that,
Power conversion device also has the 2nd demarcation strip, and the 2nd demarcation strip covers the part of the described power model side in the gap of described multiple radiator bodies, and, spaced apart by the space of described multiple power model sides and described multiple fin sides.
13. according to the power conversion device described in any one in claim 1 to 4,6,7,12, it is characterized in that,
Described power model has the semiconductor element being formed by wide band gap semiconducter.
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| JP2012267457A JP5787865B2 (en) | 2012-12-06 | 2012-12-06 | Power converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322764A (en) * | 2014-07-29 | 2016-02-10 | 株式会社安川电机 | Power conversion apparatus |
| CN111727554A (en) * | 2018-03-28 | 2020-09-29 | 株式会社日立产机系统 | Power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5787865B2 (en) | 2015-09-30 |
| JP2014117011A (en) | 2014-06-26 |
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Application publication date: 20140611 |