Patents by Inventor Takahide Tadokoro
Takahide Tadokoro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20210164670Abstract: An air-sending device includes a propeller fan, a bell mouth surrounding an outer periphery of the propeller fan, a fan grille disposed downstream of the bell mouth and including a plurality of first crosspieces. An edge of the air outlet of the bell mouth includes a varying portion whose distance from a rotation axis of the propeller fan varies. In a cross-section of any of the plurality of first crosspieces that is perpendicular to a longitudinal direction of the any of the plurality of first crosspieces, a virtual line segment connecting an upstream side end portion and a downstream side end portion is defined as a first virtual line segment. At the portions of the plurality of first crosspieces disposed on the inner circumference side of the varying portion, the angle between a virtual line segment parallel to the rotation axis and the first virtual line segment is changed.Type: ApplicationFiled: June 4, 2018Publication date: June 3, 2021Inventors: Takahide TADOKORO, Yasuaki KATO, Keisuke HOKAZONO
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Patent number: 11022327Abstract: An outdoor unit 1 of an air-conditioning apparatus includes a housing having a box shape and including air inlets formed on side surfaces and an air outlet formed on an upper surface, a fan provided to an upper side in the housing and configured to discharge, through the air outlet, outside air sucked through the air inlets, and a heat exchanger provided in the housing along each of the air inlets. The heat exchanger includes an upper heat exchanger disposed at an upper part of the housing and a lower heat exchanger disposed at a lower part of the housing. In plan view, the housing has different widths in short-side and long-side directions, and the width in the short-side direction at the upper part of the housing is longer than the width in the short-side direction at the lower part of the housing.Type: GrantFiled: May 14, 2015Date of Patent: June 1, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahide Tadokoro, Seiji Nakashima, Shinya Higashiiue, Naomichi Tamura
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Publication number: 20210033292Abstract: An air-sending device includes a fan and a grille provided downstream of the fan in a direction of airflow generated by the fan. The grille includes a first grille that includes a plurality of first bars spaced from each other, and a second grille that includes a plurality of second bars spaced from each other. The plurality of second bars are more densely arranged than the plurality of first bars. The second grille is provided upstream of the first grille in the direction of the airflow generated by the fan, and spaced from the first grille to face the first grille.Type: ApplicationFiled: May 22, 2018Publication date: February 4, 2021Inventors: Takafumi ABE, Takahide TADOKORO, Katsuyuki YAMAMOTO
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Patent number: 10890194Abstract: Provided is an air-sending device in which, in blades, an upstream end of a blade outer periphery is more on an upstream side than an upstream end of a blade inner periphery as seen along a rotation axis, and a downstream end of a blade outer periphery is more on a downstream side than a downstream end of the blade inner periphery, and in which, in the blades, when an angle formed by a line segment, which connects a point internally dividing a line segment connecting the downstream end and the upstream end of an outer periphery of the blades along the rotation axis and a point internally dividing a line segment connecting the downstream end and the upstream end of an inner periphery of the blades along the rotation axis at the same ratio to each other, and a reference line is defined as ?, and a direction inclined toward the downstream side is defined as positive, the angle ? is changed from negative to positive at a duct portion.Type: GrantFiled: February 24, 2016Date of Patent: January 12, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takahide Tadokoro, Seiji Nakashima, Yutaka Aoyama, Shuhei Mizutani, Naomichi Tamura
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Publication number: 20210003140Abstract: A propeller fan includes a cylindrical shaft portion provided on a rotation axis of the propeller fan; a plurality of blades provided on an outer peripheral side of the shaft portion; a connection portion provided adjacent to the shaft portion and connecting two of the plurality of blades that are adjacent to each other in a circumferential direction of the propeller fan; a first rib provided on at least one of a pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on a downstream side in the flow of air, and a second rib provided on at least one of a negative-pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on an upstream side in the flow of air.Type: ApplicationFiled: August 9, 2017Publication date: January 7, 2021Inventors: Katsuyuki YAMAMOTO, Takuya TERAMOTO, Takahide TADOKORO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
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Publication number: 20210003142Abstract: A propeller fan according to an embodiment of the present invention includes a shaft provided a rotation axis of the propeller fan, and a blade provided on an outer peripheral side of the shaft. The blade has a trailing edge on a rear side of the blade in a rotation direction of the propeller fan. The trailing edge includes a first trailing edge located on an innermost side of the trailing edge, and a second trailing edge adjacent to and outward of the first trailing edge. Where an innermost point of the first trailing edge is a first connection point, a connection point between the first trailing edge and the second trailing edge is a second connection point, and a straight line that extends through the rotation axis and the first connection point is a reference line, the second connection point is located forward of the reference line in the rotation direction, or located on the reference line, and the second trailing edge is located rearward of the second connection point in the rotation direction.Type: ApplicationFiled: August 9, 2017Publication date: January 7, 2021Inventors: Takahide TADOKORO, Takuya TERAMOTO, Katsuyuki YAMAMOTO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
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Patent number: 10801518Abstract: A blower apparatus includes a propeller fan configured to rotate about a rotational axis, and a bell mouth annularly disposed to surround the propeller fan as seen in a direction of the rotational axis of the propeller fan. The bell mouth includes a flare portion located downstream of the propeller fan The flare portion has at least one first part and at least one second part. The first part has a first inner circumferential surface region. The second part as a second inner circumferential surface region. A first length of the first part inner circumferential surface region in the direction of the rotational axis is greater than a second length of the second part inner circumferential surface region in the direction of the rotational axis.Type: GrantFiled: February 26, 2016Date of Patent: October 13, 2020Assignee: Mitsubishi Electric CorporationInventors: Seiji Nakashima, Takahide Tadokoro, Shuhei Mizutani, Yutaka Aoyama
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Publication number: 20200240429Abstract: In a propeller fan, an air-sending device and an air-conditioning apparatus, between a leading edge and trailing edge of each of blades, a starting point at which the first one of first maximum points is located is closer to the leading edge than a starting point at which the first one of second maximum points are located, distances L1 between minimum points and the first maximum points vary such that the distance L1 increases from the starting point at which the first one of the first maximum points is located, toward the trailing edge, and distances L2 between a connection point and the second maximum points vary in accordance with the position of each of the second maximum points such that the distance L2 increases from the starting point at which the first one of the second maximum points is located, toward the trailing edge.Type: ApplicationFiled: February 28, 2017Publication date: July 30, 2020Applicant: Mitsubishi Electric CorporationInventors: Takahide TADOKORO, Naohiko HONMA
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Publication number: 20200166048Abstract: A propeller fan includes a shaft portion disposed on a rotation axis, and a blade disposed on an outer peripheral side of the shaft portion and including a leading edge and a trailing edge. The blade includes a negative pressure surface in which a plurality of recesses are formed, and the plurality of recesses include a first recess and a second recess disposed on the trailing edge side than the first recess in a circumferential direction about the rotation axis as a center. The first recess has a depth larger than a depth of the second recess.Type: ApplicationFiled: August 9, 2017Publication date: May 28, 2020Inventors: Takuya TERAMOTO, Takahide TADOKORO, Katsuyuki YAMAMOTO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
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Patent number: 10480526Abstract: An axial flow fan according to the present invention includes a plurality of blades, each of the blades including: a leading edge formed in front in a direction of rotation of the axial flow fan; an inner circumferential edge formed at an inner circumference of the blades; and an outer circumferential edge formed at an outer circumference of the blades, the outer circumferential edge configured to be at downstream of a fluid, forced to move by the axial flow fan, than the inner circumferential edge, the blade being reflexed toward upstream of the fluid at a portion adjacent to the outer circumferential edge, and having a local angle-decrease section having a blade inlet angle ? at the leading edge decreasing from neighborhood, the local angle-decrease section being formed at a side of the leading edge and being located closer to the outer circumferential edge than to the inner circumferential edge.Type: GrantFiled: November 2, 2015Date of Patent: November 19, 2019Assignee: Mitsubishi Electric CorporationInventors: Seiji Nakashima, Takahide Tadokoro, Shuhei Mizutani, Yutaka Aoyama
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Patent number: 10436496Abstract: A blade included in an impeller is formed so that, when viewed in a vertical cross-sectional view of the blade, a pressure surface of the blade and a suction surface of the blade opposite to the pressure surface are curved more in the direction in which the impeller rotates, in their areas farther from the axis of rotation of the impeller and closer to the exterior of the blade, and are arched so that a portion near the center of the blade is most distant from a straight line connecting the inner end and the outer end of the blade, the pressure surface and the suction surface form a curved surface including at least one circular arc, and a straight portion of the blade is formed to be connected to the curved surface on its one side, and extend toward the inner end of the blade on its other side.Type: GrantFiled: October 4, 2012Date of Patent: October 8, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi Ikeda, Takahide Tadokoro, Mitsuhiro Shirota, Seiji Hirakawa, Koji Yamaguchi, Koichi Umetsu
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Publication number: 20190048890Abstract: An axial-flow fan includes an impeller including plural blades fixed to an outer peripheral portion of the hub and each surrounded by an inner peripheral edge, an outer peripheral edge, a leading edge, and a trailing edge. The leading edge is forward-curved in a rotational direction with an angle increasing to outer periphery of the impeller and runs toward an outer periphery up to point A, the trailing edge is forward-curved in the rotational direction and runs toward the outer periphery up to point D, recedes in the rotational direction of the impeller as the trailing edge runs toward the outer periphery up to point A? located closer to the outer periphery than point D is to the outer periphery, advances in the rotational direction of the impeller in a region between point A? and point B?, and reflexed at point D and point A?.Type: ApplicationFiled: September 27, 2016Publication date: February 14, 2019Applicant: Mitsubishi Electric CorporationInventors: Naohiko HONMA, Takahide TADOKORO
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Publication number: 20190040873Abstract: Provided is an air-sending device in which, in blades, an upstream end of a blade outer periphery is more on an upstream side than an upstream end of a blade inner periphery as seen along a rotation axis, and a downstream end of a blade outer periphery is more on a downstream side than a downstream end of the blade inner periphery, and in which, in the blades, when an angle formed by a line segment, which connects a point internally dividing a line segment connecting the downstream end and the upstream end of an outer periphery of the blades along the rotation axis and a point internally dividing a line segment connecting the downstream end and the upstream end of an inner periphery of the blades along the rotation axis at the same ratio to each other, and a reference line is defined as ?, and a direction inclined toward the downstream side is defined as positive, the angle ? is changed from negative to positive at a duct portion.Type: ApplicationFiled: February 24, 2016Publication date: February 7, 2019Applicant: Mitsubishi Electric CorporationInventors: Takahide TADOKORO, Seiji NAKASHIMA, Yutaka AOYAMA, Shuhei MIZUTANI, Naomichi TAMURA
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Publication number: 20190010960Abstract: A blower apparatus includes a propeller fan configured to rotate about a rotational axis, and a bell mouth annularly disposed to surround the propeller fan as seen in a direction of the rotational axis of the propeller fan. The bell mouth includes a flare portion located downstream of the propeller fan The flare portion has at least one first part and at least one second part. The first part has a first inner circumferential surface region. The second part as a second inner circumferential surface region. A first length of the first part inner circumferential surface region in the direction of the rotational axis is greater than a second length of the second part inner circumferential surface region in the direction of the rotational axis.Type: ApplicationFiled: February 26, 2016Publication date: January 10, 2019Inventors: Seiji NAKASHIMA, Takahide TADOKORO, Shuhei MIZUTANI, Yutaka AOYAMA
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Patent number: 10145601Abstract: An outdoor unit according to the present invention includes an air-sending-device chamber including a heat exchanger disposed at least on the rear side within an outdoor unit body, a propeller fan having a plurality of blades and disposed on the front side of the heat exchanger, and a bell mouth disposed on the front side of the propeller fan to face an air outlet, a machine chamber in which a compressor is disposed, and a partition plate that separates the air-sending-device chamber and the machine chamber. The partition plate has a protruding shape protruding from the air-sending-device chamber toward the machine chamber. The partition plate has, on the side of the air-sending-device chamber, a recessed area corresponding to the protruding shape. The amount of recess of the recessed area is maximized at a position equal in height to the center of rotation of the propeller fan.Type: GrantFiled: May 10, 2012Date of Patent: December 4, 2018Assignee: Mitsubishi Electric CorporationInventors: Atsushi Kono, Takahide Tadokoro
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Publication number: 20180238344Abstract: An axial flow fan according to the present invention includes a plurality of blades, each of the blades including: a leading edge formed in front in a direction of rotation of the axial flow fan; an inner circumferential edge formed at an inner circumference of the blades; and an outer circumferential edge formed at an outer circumference of the blades, the outer circumferential edge configured to be at downstream of a fluid, forced to move by the axial flow fan, than the inner circumferential edge, the blade being reflexed toward upstream of the fluid at a portion adjacent to the outer circumferential edge, and having a local angle-decrease section having a blade inlet angle ? at the leading edge decreasing from neighborhood, the local angle-decrease section being formed at a side of the leading edge and being located closer to the outer circumferential edge than to the inner circumferential edge.Type: ApplicationFiled: November 2, 2015Publication date: August 23, 2018Applicant: Mitsubishi Electric CorporationInventors: Seiji NAKASHIMA, Takahide TADOKORO, Shuhei MIZUTANI, Yutaka AOYAMA
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Propeller fan, and air blower, air conditioner, and hot-water supply outdoor unit including the same
Patent number: 10047764Abstract: In a blade cross-sectional view, assuming that a tangent at an end of the outer periphery is defined as LQ, an imaginary line orthogonal to the rotation axis is defined as LO, an angle formed by the tangent (LQ) and the imaginary line (LO) is defined as an outer peripheral end tangent angle (?), and a position at which an imaginary plane including a position of an intake-side end portion of the bellmouth and a peripheral edge of the blade cross each other is defined as an overlap starting point, the outer peripheral end tangent angle on a trailing edge portion side with respect to a blade cross section including the overlap starting point is set to be smaller than the outer peripheral end tangent angle on a leading edge portion side with respect to the blade cross section including the overlap starting point.Type: GrantFiled: July 18, 2013Date of Patent: August 14, 2018Assignee: Mitsubishi Electric CorporationInventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono -
Publication number: 20180156475Abstract: An outdoor unit 1 of an air-conditioning apparatus includes a housing having a box shape and including air inlets formed on side surfaces and an air outlet formed on an upper surface, a fan provided to an upper side in the housing and configured to discharge, through the air outlet, outside air sucked through the air inlets, and a heat exchanger provided in the housing along each of the air inlets. The heat exchanger includes an upper heat exchanger disposed at an upper part of the housing and a lower heat exchanger disposed at a lower part of the housing. In plan view, the housing has different widths in short-side and long-side directions, and the width in the short-side direction at the upper part of the housing is longer than the width in the short-side direction at the lower part of the housing.Type: ApplicationFiled: May 14, 2015Publication date: June 7, 2018Applicant: Mitsubishi Electric CorporationInventors: Takahide TADOKORO, Seiji NAKASHIMA, Shinya HIGASHIIUE, Naomichi TAMURA
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Patent number: 9970454Abstract: A propeller fan, including: a boss; and a plurality of blades, each of the plurality of blades including a pressure surface and a suction surface, in which: when a connecting portion between the pressure surface and a side surface of the boss is defined as a pressure surface-side boundary portion, and a connecting portion between the suction surface and the side surface of the boss is defined as a suction surface-side boundary portion, a curvature of the suction surface-side boundary portion is smaller than a curvature of the pressure surface-side boundary portion; and as a blade area projected on a plane orthogonal to the rotation axis, a blade area of the suction surface is larger than a blade area of the pressure surface.Type: GrantFiled: January 20, 2014Date of Patent: May 15, 2018Assignee: Mitsubishi Electric CorporationInventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
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Patent number: D858737Type: GrantFiled: September 14, 2017Date of Patent: September 3, 2019Assignee: Mitsubishi Electric CorporationInventors: Takahide Tadokoro, Seiji Nakashima, Yutaka Aoyama, Shuhei Mizutani, Naomichi Tamura