EP3196560B1 - Unité intérieure de dispositif de climatisation et dispositif de climatisation - Google Patents
Unité intérieure de dispositif de climatisation et dispositif de climatisation Download PDFInfo
- Publication number
- EP3196560B1 EP3196560B1 EP14901479.7A EP14901479A EP3196560B1 EP 3196560 B1 EP3196560 B1 EP 3196560B1 EP 14901479 A EP14901479 A EP 14901479A EP 3196560 B1 EP3196560 B1 EP 3196560B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- indoor unit
- conditioning apparatus
- heat exchanger
- centrifugal fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
Definitions
- the present invention relates to an indoor unit for an air-conditioning apparatus or the like including, for example, a centrifugal fan.
- the following technology has been provided as a technology for controlling a flow at an air outlet portion of a fan (in particular, a technology of equalizing a wind velocity to achieve low power consumption and low noise).
- a centrifugal fan which includes an impeller including a plurality of air-sending fins arranged between a main plate and a side plate and is configured to send air in a direction orthogonal to or substantially orthogonal to a rotation shaft
- an outer diameter of the side plate or the main plate is formed to be larger than an outer diameter of the air-sending fins of the impeller (for example, see Patent Literature 1 which discloses an indoor unit according to the preamble of claim 1).
- the outer diameter of the side plate or the main plate is larger than the outer diameter of the air-sending fins of the impeller.
- a boundary layer in the side plate and the main plate is thick, and hence an actual passage between blades is narrow. Therefore, there is a problem in that low power consumption and low noise are not achieved sufficiently.
- the present invention has been made to solve the above-mentioned problem, and provides an indoor unit for an air-conditioning apparatus and other inventions achieving the low power consumption and low noise.
- the air outlet is extended in a height direction at the outer periphery of the main plate, thereby being capable of equally sending air, which has flowed in through the air inlet, to an indoor heat exchanger higher than a height of the air outlet.
- a flow of air flowing out from the centrifugal fan is likely to extend in an inflow direction of the air, and extends along an edge with minimum difficulty. Therefore, the inflow of airflow to the heat exchanger can effectively be equalized, thereby being capable of achieving the indoor unit for an air-conditioning apparatus with low power consumption and low noise.
- Fig. 1 to Fig. 4 are views for illustrating an indoor unit 100 for an air-conditioning apparatus according to Embodiment 1 of the present invention.
- Fig. 1 is a perspective view of a centrifugal fan 1 of the indoor unit 100 for an air-conditioning apparatus according to Embodiment 1 of the present invention.
- Fig. 2 is a top view of the indoor unit 100 for an air-conditioning apparatus according to Embodiment 1 of the present invention.
- Fig. 3 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line A-A of Fig. 2 according to Embodiment 1 of the present invention.
- Fig. 4 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line B-B of Fig. 2 according to Embodiment 1 of the present invention.
- the indoor unit 100 for an air-conditioning apparatus includes a centrifugal fan 1, a bellmouth 2, and an indoor heat exchanger 3.
- the indoor unit 100 for an air-conditioning apparatus of this embodiment is an indoor unit of a ceiling concealed type.
- the centrifugal fan 1 includes a boss 12 configured to rotate about an axial center 11, a main plate 13 coupled to the boss 12, a shroud 14 having an air inlet 141 into which gas (e.g., air) flows, and a plurality of (seven in this embodiment) blades 15 arranged between the main plate 13 and the shroud 14.
- centrifugal fan 1 spaces of the blades 15 sandwiched by the main plate 13 and the shroud 14 serve as an air outlet 16.
- a driving device fan motor or other components
- the centrifugal fan 1 is rotated, air flows into (is sucked into) the air inlet 141 facing in a rotation shaft direction (hereinafter referred to as "axial direction") through the bellmouth 2.
- the air having flowed in flows out (is blown out) through the air outlet 16 facing in an outer peripheral direction intersecting the rotation shaft.
- the bellmouth 2 is installed on a air inflow side (inlet side) of the centrifugal fan 1.
- the bellmouth 2 is configured to rectify air and allow the air to flow into the air inlet 141 of the centrifugal fan 1.
- the indoor heat exchanger 3 is installed so as to surround the air outlet 16 of the centrifugal fan 1.
- the indoor heat exchanger 3 is configured to exchange heat between refrigerant flowing in the heat exchanger and air, to thereby cool and heat the air.
- a height of the indoor heat exchanger 3 (length in the vertical direction) in the indoor unit 100 for an air-conditioning apparatus of this embodiment is set to be larger than a height of the air outlet 16 of the centrifugal fan 1 (length between the main plate 13 and the shroud 14).
- the air having flowed out through the air outlet 16 of the centrifugal fan 1 passes through the indoor heat exchanger 3 and flows out of the indoor unit 100 for an air-conditioning apparatus.
- the extended portion 132 is formed to have an arcuate shape (including a case of a substantially arcuate shape, which is hereinafter referred to as "substantially arcuate shape") in a sectional surface including the rotation shaft. Further, as is clear from the difference in the extended portion 132 between Fig. 3 and Fig. 4 , the extended portion 132 is formed to have a curvature radius larger at blade portions 152, which are first portions at which the main plate 13 and the blades 15 are connected, than portions between blades 151, which are second portions.
- Fig. 5 is a sectional view for illustrating a flow of air in a related-art indoor unit for an air-conditioning apparatus.
- Fig. 6 is a sectional view for illustrating a flow of air in the indoor unit 100 for an air-conditioning apparatus according to Embodiment 1 of the present invention.
- the reference symbols which are the same as those denoting the members of the indoor unit 100 for an air-conditioning apparatus of this embodiment are given in Fig. 5 .
- description is made of an effect which can be obtained by the configuration of the indoor unit 100 for an air-conditioning apparatus of this embodiment.
- the indoor unit 100 for an air-conditioning apparatus air having flowed out through the air outlet 16 of the centrifugal fan 1 flows into the indoor heat exchanger 3.
- a height of the indoor heat exchanger 3 and a height of the air outlet 16 are different.
- the flow into the indoor heat exchanger 3 is uneven in the related-art indoor unit 100 for an air-conditioning apparatus. For example, less air flows into a region which corresponds to a side being a top surface (lower side in Fig. 5 ) at the time of installation of the indoor unit 100 for an air-conditioning apparatus.
- the indoor unit 100 for an air-conditioning apparatus of this embodiment has, at the outer peripheral edge 131 of the main plate 13, the extended portion 132 having the substantially arcuate shape, which causes the air outlet 16 to extend toward the axial main plate side.
- the air flowing out from the centrifugal fan 1 is likely to extend toward the top surface side.
- a flow of the air flowing out from the centrifugal fan 1 has a large outflow velocity at the blade portions 152 giving work to airflow, and has a small outflow velocity at portions between blades 151 of the blade portions 152.
- the extended portion 132 having the substantially arcuate shape is formed to have a large curvature ratio at the blade portions 152 having a large outflow velocity, and is formed to have a small curvature ratio at the portions between blades 151 having a small outflow velocity. Then, air is caused to extend, with minimum difficulty, toward the axial main plate side along the extended portion 132 having the substantially arcuate shape at the outer peripheral edge 131 of the main plate 13. Therefore, the inflow of air to the indoor heat exchanger 3 can effectively be equalized. Accordingly, the indoor unit 100 for an air-conditioning apparatus can be configured with low power consumption and low noise.
- Fig. 7 and Fig. 8 are views for illustrating the indoor unit 100 for an air-conditioning apparatus according to Embodiment 2 of the present invention.
- Fig. 7 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line A-A of Fig. 2 according to Embodiment 2 of the present invention.
- Fig. 8 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line B-B of Fig. 2 according to Embodiment 2 of the present invention.
- the indoor unit 100 for an air-conditioning apparatus of this embodiment is configured such that a tangential line on the outer peripheral edge 131 at the extended portion 132, which has the substantially arcuate shape and extends toward the axial main plate side at the outer peripheral edge 131 of the main plate 13 of the centrifugal fan 1, passes through a lower end 31 of the indoor heat exchanger 3 at a position where the outer peripheral edge 131 of the centrifugal fan 1 and the indoor heat exchanger 3 are closest to each other in distance therebeween.
- the outflow from the centrifugal fan 1 extending along the extended portion 132 having the substantially arcuate shape extending toward the axial main plate side at the outer peripheral edge 131 of the main plate 13 extends at an optimum extending angle.
- the outflow flows into the indoor heat exchanger 3 with moderate quantity. Therefore, the inflow of the airflow into the indoor heat exchanger 3 can be equalized more effectively, thereby being capable of further achieving the indoor unit 100 for an air-conditioning apparatus with low power consumption and low noise.
- Fig. 9 and Fig. 10 are views for illustrating the indoor unit 100 for an air-conditioning apparatus according to Embodiment 3 of the present invention.
- Fig. 9 is a perspective view of the centrifugal fan 1 of the indoor unit 100 for an air-conditioning apparatus according to Embodiment 3 of the present invention.
- Fig. 10 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line A-A of Fig. 2 according to Embodiment 3 of the present invention.
- the indoor unit 100 for an air-conditioning apparatus includes small blades 17 arranged on an upstream surface of the shroud 14 of the centrifugal fan 1.
- Fig. 11 is a sectional view for illustrating a flow of air in the indoor unit 100 for an air-conditioning apparatus according to Embodiment 3 of the present invention. With reference to Fig. 11 , description is made of an effect which can be obtained by the configuration of the indoor unit 100 for an air-conditioning apparatus according to Embodiment 3.
- a shroud-neighboring vortex 4 generated in a space formed among the shroud 14, the bellmouth 2, and the indoor heat exchanger 3 can be strong.
- an airflow inducing effect exerted by the action of the strong shroud-neighboring vortex 4 may cause the air flowing out from the centrifugal fan 1 to be likely to extend toward the bellmouth 2 side in the axial direction (axial bellmouth side). Therefore, the inflow of the airflow into the indoor heat exchanger 3 can be equalized more effectively, thereby being capable of achieving the indoor unit 100 for an air-conditioning apparatus with low power consumption and low noise.
- Fig. 12 is a perspective view of the centrifugal fan 1 of the indoor unit 100 for an air-conditioning apparatus according to Embodiment 4 of the present invention.
- the number of the small blades 17 arranged on the upstream surface of the shroud 14 of the centrifugal fan 1 is the same as the number of the plurality of blades 15 arranged between the main plate 13 and the shroud 14. Further, the small blades 17 are arranged at the same positions as the blades 15 when viewed in the axial direction.
- a flow of air flowing out from the centrifugal fan 1 has a large outflow velocity at the blade portions 152 giving work to airflow, and has a small outflow velocity at the portions between blades 151 of the blade portions 152.
- the strong shroud-neighboring vortex 4 is generated at each of small blade portions 172 being spaces near the small blades 17 arranged on the upstream surface of the shroud 14.
- a weak shroud-neighboring vortex 4 is generated at each of between-small-blades portions 171 being spaces of the small blades 17.
- a relatively stronger shroud-neighboring vortex 4 is generated at the blade portions 152 having a large outflow velocity to extend the outflow having a large flow velocity toward the axial shroud side with an inducing effect.
- a relatively weaker shroud-neighboring vortex 4 is generated at the portions between blades 151 having a small outflow velocity to extend the outflow having a small flow velocity toward the axial shroud side with the inducing effect.
- the inducing effect having a strength corresponding to a magnitude of the outflow velocity can be exerted.
- the inflow of the airflow into the indoor heat exchanger 3 can more effectively be equalized, thereby being capable of achieving the indoor unit 100 for an air-conditioning apparatus with low power consumption and low noise.
- Fig. 13 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line A-A of Fig. 2 according to Embodiment 5 of the present invention.
- the indoor unit 100 for an air-conditioning apparatus As illustrated in Fig. 13 , with regard to the small blades 17 arranged on the upstream surface of the shroud 14 of the centrifugal fan 1, an axial height from a shroud outer peripheral edge 142 to a small blade outer peripheral upper edge 173 is h, and an axial height from the shroud outer peripheral edge 142 to the bellmouth 2 is H.
- the indoor unit 100 for an air-conditioning apparatus is configured so that h is one-half of or less than H.
- a magnitude of the shroud-neighboring vortex 4 generated by the small blades 17 is not excessively large.
- interference with the bellmouth 2 is prevented. Therefore, while a flow loss is suppressed to be minimum, the flow of the air flowing out from the centrifugal fan 1 can effectively be extended toward the axial shroud side by the inducing effect.
- the inflow of the airflow to the indoor heat exchanger 3 can be equalized, thereby being capable of achieving the indoor unit 100 for an air-conditioning apparatus with low power consumption and low noise.
- Fig. 14 is a sectional view of the indoor unit 100 for an air-conditioning apparatus taken along the line A-A of Fig. 2 according to Embodiment 6 of the present invention.
- a radial distance at a position where the air outlet 16 at the outer peripheral edge 131 of the centrifugal fan 1 and the indoor heat exchanger 3 are closest to each other is L.
- the indoor unit 100 for an air-conditioning apparatus of this embodiment is configured to satisfy L1 ⁇ L ⁇ L2.
- the extended portion 132 having the substantially arcuate shape extending toward the axial main plate side is formed at the outer peripheral edge 131 of the main plate 13.
- the curvature ratio of the extended portion 132 having the substantially arcuate shape is set to be large at the blade portion 152 having a large outflow velocity and set to be small at the portion between blades 151 having a small outflow velocity.
- the indoor unit 100 for an air-conditioning apparatus with low power consumption and low noise can be achieved.
- Fig. 15 is a view for illustrating a configuration example of an air-conditioning apparatus according to Embodiment 7 of the present invention.
- an outdoor unit 200 and the indoor unit 100 are connected to each other by pipes including a gas refrigerant pipe 300 and a liquid refrigerant pipe 400.
- the outdoor unit 200 includes a compressor 201, a four-way valve 202, an outdoor heat exchanger 203, an expansion valve 204, and an outdoor air-sending device 205.
- the indoor unit 100 for an air-conditioning apparatus includes the indoor heat exchanger 3.
- the compressor 201 is configured to compress and discharge sucked refrigerant.
- the compressor 201 is not particularly limited, but may include, for example, an inverter circuit so that an operating frequency thereof is arbitrarily changed, thereby being capable of changing a capacity of the compressor 201 (amount of refrigerant sent per unit time).
- the four-way valve 202 is a valve configured to switch flow of the refrigerant during the cooling operation and flow of the refrigerant during the heating operation to each other, for example.
- the outdoor heat exchanger 203 is configured to exchange heat between the refrigerant and the air (outside air). Specifically, the outdoor heat exchanger 203 functions as an evaporator during the heating operation so as to evaporate and gasify the refrigerant, and functions as a condenser during the cooling operation so as to condense and liquefy the refrigerant. Further, the outdoor air-sending device 205 is configured to send the air into the outdoor heat exchanger 203.
- the expansion valve 204 e.g., an expansion device (flow rate control unit) is configured to decompress and extend the refrigerant. For example, when the expansion valve 204 is constructed by an electronic expansion valve, an opening degree thereof is controlled in response to instructions from a controller (not shown), for example.
- the indoor heat exchanger 3 is configured to exchange heat between the gas (for example, air to be air-conditioned) and the refrigerant.
- the indoor heat exchanger 3 functions as the condenser during the heating operation so as to condense and liquefy the refrigerant, and functions as the evaporator during the cooling operation so as to evaporate and gasify the refrigerant.
- the centrifugal fan 1 sends air, which is to be air-conditioned, into the indoor heat exchanger 3.
- the centrifugal fan 1 of this embodiment has the extended portion 132 formed on the main plate 13.
- the air-conditioning apparatus of Embodiment 7 through use of the indoor unit 100 for an air-conditioning apparatus described in Embodiment 1 to Embodiment 6, the inflow of the airflow to the indoor heat exchanger 3 can effectively be equalized.
- the low power consumption and low noise can be achieved in the apparatus as a whole.
- Embodiment 7 description is made of the air-conditioning apparatus.
- the indoor unit of Embodiment 1 to Embodiment 3 can be used for other refrigeration cycle apparatus, e.g., a refrigerating apparatus.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Claims (7)
- Unité intérieure pour un appareil de climatisation :l'unité intérieure comprenant :
un ventilateur centrifuge (1) comprenant :une plaque principale (13) fixée à un arbre de rotation ;un flasque (14) opposé à la plaque principale (13) et ayant une entrée d'air (141) dans laquelle l'air peut s'écouler ; etune pluralité de pales (15) agencées entre la plaque principale (13) et le flasque (14) et respectivement raccordées aux premières parties de la plaque principale (13) ; etune sortie d'air (16) formée au niveau des secondes parties de la plaque principale (13) entre les pales (15) et à travers laquelle l'air peut sortir, dans laquelle les espaces des pales (15) prises en sandwich par la plaque principale (13) et le flasque (14) servent de sortie d'air (16),la plaque principale (13) ayant une partie étendue (132) formée au niveau de son bord périphérique externe (131), la partie étendue (132) s'étendant dans une direction pour étendre une hauteur d'ouverture de la sortie d'air (16), la partie étendue (132) étant formée pour avoir une forme arquée dans une surface transversale comprenant l'arbre de rotation, la forme arquée ayant un rapport de courbure ; caractérisée en ce que :
le rapport de courbure de la forme arquée de la partie étendue (132) est configuré pour être plus important au niveau des premières parties qu'au niveau des secondes parties. - Unité intérieure pour un appareil de climatisation selon la revendication 1, comprenant en outre un échangeur de chaleur intérieur (3) ayant une hauteur supérieure à la hauteur d'ouverture, l'échangeur de chaleur intérieur étant agencé afin d'entourer la sortie d'air et configuré de sorte qu'une ligne tangentielle à la forme arquée de la partie étendue (132) passe par une extrémité inférieure de l'échangeur de chaleur intérieur (3) dans une position dans laquelle le bord périphérique externe (131) et l'échangeur de chaleur intérieur (3) sont le plus proche l'un de l'autre.
- Unité intérieure pour un appareil de climatisation selon la revendication 1 ou 2, dans laquelle le ventilateur centrifuge (1) comprend de petites pales (172) sur une surface en amont du flasque (14).
- Unité intérieure pour un appareil de climatisation selon la revendication 3, dans laquelle le nombre des petites pales (172) est le même que le nombre de pales (15), et les petites pales (172) sont agencées dans les mêmes positions que les pales, lorsqu'elles sont observées dans la direction de l'arbre de rotation.
- Unité intérieure pour un appareil de climatisation selon la revendication 3 ou 4, dans laquelle une hauteur des petites pales (172) représente la moitié ou une valeur inférieure à une distance entre un bord périphérique externe du flasque (14) et un pavillon (2) agencé sur un côté d'entrée d'air du ventilateur centrifuge (1) dans la direction de l'arbre de rotation.
- Unité intérieure pour un appareil de climatisation selon l'une quelconque des revendications 1 à 4, dans laquelle, lorsqu'une distance radiale dans une position dans laquelle un bord périphérique externe du ventilateur centrifuge (1) et l'échangeur de chaleur intérieur (3) sont le plus proche l'un de l'autre, est L, et concernant une distance axiale entre un bord périphérique externe d'un flasque (14) du ventilateur centrifuge (1) et un bord supérieur d'un échangeur de chaleur (3) et une distance axiale entre un bord de la partie périphérique externe de la plaque principale (13) du ventilateur centrifuge (1) et une extrémité inférieure de l'échangeur de chaleur (3), une distance plus courte est L1, et une distance plus longue est L2, une relation de L1 < L < L2 est satisfaite.
- Appareil de climatisation configuré pour réaliser une climatisation, comprenant :l'unité intérieure pour un appareil de climatisation (100) selon l'une quelconque des revendications 1 à 6 ; etune unité extérieure (200).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/073833 WO2016038690A1 (fr) | 2014-09-09 | 2014-09-09 | Unité intérieure de dispositif de climatisation et dispositif de climatisation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3196560A1 EP3196560A1 (fr) | 2017-07-26 |
| EP3196560A4 EP3196560A4 (fr) | 2018-05-09 |
| EP3196560B1 true EP3196560B1 (fr) | 2020-09-09 |
Family
ID=55458481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14901479.7A Active EP3196560B1 (fr) | 2014-09-09 | 2014-09-09 | Unité intérieure de dispositif de climatisation et dispositif de climatisation |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3196560B1 (fr) |
| JP (1) | JP6429887B2 (fr) |
| WO (1) | WO2016038690A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723778B2 (ja) * | 1988-12-20 | 1995-03-15 | ダイキン工業株式会社 | 空気調和装置 |
| JP2956317B2 (ja) * | 1990-11-07 | 1999-10-04 | ダイキン工業株式会社 | 空気調和装置 |
| JP2715765B2 (ja) * | 1991-12-25 | 1998-02-18 | 三菱電機株式会社 | 空気調和機 |
| JP3476085B2 (ja) * | 1992-02-17 | 2003-12-10 | 株式会社デンソー | 多翼送風ファン |
| JP2001173595A (ja) * | 1999-12-15 | 2001-06-26 | Hitachi Ltd | 遠心型羽根車 |
| JP4859204B2 (ja) * | 2006-01-27 | 2012-01-25 | 日立アプライアンス株式会社 | 遠心ファンとそれを備えた空気調和装置 |
| ES2404073T3 (es) * | 2009-02-12 | 2013-05-23 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Rueda de ventilador radial o diagonal |
-
2014
- 2014-09-09 EP EP14901479.7A patent/EP3196560B1/fr active Active
- 2014-09-09 JP JP2016547295A patent/JP6429887B2/ja not_active Expired - Fee Related
- 2014-09-09 WO PCT/JP2014/073833 patent/WO2016038690A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3196560A4 (fr) | 2018-05-09 |
| JP6429887B2 (ja) | 2018-11-28 |
| WO2016038690A1 (fr) | 2016-03-17 |
| EP3196560A1 (fr) | 2017-07-26 |
| JPWO2016038690A1 (ja) | 2017-06-01 |
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