Patents by Inventor Kenshi Ueda
Kenshi Ueda 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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Patent number: 10001303Abstract: A rotary compressor includes a sealed vertical compressor housing, a compressing unit, and a motor. A refrigerant discharging unit is provided at an upper part and a refrigerant intake unit is provided at a lower part side surface in the sealed vertical compressor housing. The compressing unit is disposed on the lower part of the compressor housing, includes an annular cylinder, an end plate including a bearing unit and a discharge valve unit and blocking end portions of the cylinder, an annular piston that engages with an eccentric portion of a rotation axis supported by the bearing unit, revolves along a cylinder inner wall of the cylinder in the cylinder, and forms a cylinder chamber between the cylinder inner wall and the annular piston, and a vane. The motor is disposed on the upper part of the compressor housing, and drives the compressing unit via the rotation axis.Type: GrantFiled: May 16, 2016Date of Patent: June 19, 2018Assignee: FUJITSU GENERAL LIMITEDInventors: Kenshi Ueda, Junya Tanaka, Kenji Komine, Shuhei Hoshino
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Publication number: 20180135630Abstract: In a rotary compressor, a refrigerant path hole communicates with a lower discharge chamber concave portion while at least a part thereof overlaps the lower discharge chamber concave portion, is positioned between a lower vane groove and a first insertion hole in a lower cylinder, and is configured of a plurality of holes which are disposed between the upper vane groove and the first insertion hole in the upper cylinder, and a sectional area of a cross section which is closest to the lower vane groove and the upper vane groove of the plurality of holes is the smallest compared to the sectional area of the cross section of the other holes.Type: ApplicationFiled: November 7, 2017Publication date: May 17, 2018Inventors: Shingo YAHABA, Akira INOUE, Kenshi UEDA, Yasuyuki IZUMI
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Publication number: 20180135632Abstract: In a rotary compressor, S1>S3, S2>S3, and S2?>S3? are satisfied when a sectional area of a refrigerant path hole on a lower endplate is S1, a sectional area of the refrigerant path hole in a lower cylinder is S2, a sectional area of the refrigerant path hole on an intermediate partition plate is S3, an area in which a section of the refrigerant path hole on the lower end plate and a section of the refrigerant path hole in the lower cylinder overlap each other is S2?, and an area in which a section of the refrigerant path hole in the lower cylinder and a section of the refrigerant path hole on the intermediate partition plate overlap each other is S3?.Type: ApplicationFiled: November 14, 2017Publication date: May 17, 2018Applicants: FUJITSU GENERAL LIMITED, FUJITSU GENERAL LIMITEDInventors: Yasuyuki IZUMI, Kenshi UEDA
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Publication number: 20170292520Abstract: A compressor includes: an annular cylinder; a rotation shaft which is rotated by the motor; a piston which revolves along an inner circumferential surface of the cylinder, and forms a cylinder chamber on the inside of the cylinder; a vane which protrudes to the inside of the cylinder chamber from a vane groove provided in the cylinder, and divides the cylinder chamber into an inlet chamber and a compression chamber by abutting against the piston; and an injection hole which injects a liquid refrigerant to the inside of the compression chamber. The center of the injection hole is disposed to be within a fan-like range of which a center angle is equal to or less than 40° toward a side opposite to a connection position between the compressor housing and the inlet unit from a center line of the vane groove in the circumferential direction of the rotation shaft.Type: ApplicationFiled: April 5, 2017Publication date: October 12, 2017Inventors: Kenshi UEDA, Akira INOUE, Naoya MOROZUMI, Yasuyuki IZUMI
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Publication number: 20170003057Abstract: A rotary compressor includes a sealed vertical compressor housing, a compressing unit, and a motor. A refrigerant discharging unit is provided at an upper part and a refrigerant intake unit is provided at a lower part side surface in the sealed vertical compressor housing. The compressing unit is disposed on the lower part of the compressor housing, includes an annular cylinder, an end plate including a bearing unit and a discharge valve unit and blocking end portions of the cylinder, an annular piston that engages with an eccentric portion of a rotation axis supported by the bearing unit, revolves along a cylinder inner wall of the cylinder in the cylinder, and forms a cylinder chamber between the cylinder inner wall and the annular piston, and a vane. The motor is disposed on the upper part of the compressor housing, and drives the compressing unit via the rotation axis.Type: ApplicationFiled: May 16, 2016Publication date: January 5, 2017Inventors: Kenshi UEDA, Junya TANAKA, Kenji KOMINE, Shuhei HOSHINO
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Patent number: 8857211Abstract: In an injectible two-staged rotary compressor, a second suction pipe includes a heat-exchange promoting unit that promotes heat exchange between intermediary-pressure injected refrigerant and internal space or an external surface of a sealed container. The heat being exchanged by the intermediary-pressure injected refrigerant absorbing heat.Type: GrantFiled: March 10, 2008Date of Patent: October 14, 2014Assignee: Fujitsu General LimitedInventors: Naoya Morozumi, Kenshi Ueda
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Publication number: 20110027117Abstract: According to one embodiment, a rotary compressor includes a compressor housing, a compressing unit, a motor, and an oil supply mechanism. The compressor housing has an inlet and an outlet of refrigerant. The compressing unit compresses refrigerant sucked in from the inlet. The motor drives the compressing unit through a rotation shaft. The oil supply mechanism supplies lubricant oil to the compressing unit through an oil supply hole of the rotation shaft. The oil supply mechanism includes a housing hole, a pump case, and a pump vane. The housing hole is communicated with the oil supply hole. The pump case is fitted in the housing hole. The pump vane is housed in the pump case, and includes a large width portion which is locked by the upper inner surface of the pump case.Type: ApplicationFiled: July 28, 2010Publication date: February 3, 2011Inventors: Masaki Fujino, Junya Tanaka, Taku Morishita, Kenshi Ueda, Naoya Morozumi
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Patent number: 7780427Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing in which first, second, third communication holes are provided apart in an axial direction on an outer peripheral wall; an accumulator held at an outside part of the housing; a low-pressure connecting pipe for connecting a bottom communication hole of the accumulator and the second communication hole; and an intermediate connecting pipe for connecting the first and third communication holes. The first and third communication holes are provided nearly in the same locations in the circumferential direction of the housing. The accumulator is held nearly in the same location in the circumferential direction as that of the second communication hole. The second communication hole is provided in a different location in the circumferential direction from those of the first and third communication holes for preventing interference between the low-pressure and intermediate connecting pipes each formed in arc shape.Type: GrantFiled: January 7, 2009Date of Patent: August 24, 2010Assignee: Fujitsu General LimitedInventors: Kenshi Ueda, Naoya Morozumi
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Publication number: 20100054978Abstract: An injectable two-stage compression rotary compressor includes a compressor housing; a low-stage compressing section provided in the compressor house; a high-stage compressing section provided near the low-stage compressing section; a motor for driving the low-stage compressing section and the high-stage compressing section; an accumulator held at an outer side portion of the compressor housing; a low-pressure connecting pipe connecting the accumulator and the low-stage compressing section; an intermediate connecting pipe connecting the low-stage compressing section and the high-stage compressing section outside the compressor housing; and an intermediate suction pipe for introducing a medium pressure injection refrigerant into the intermediate connecting pipe. The intermediate suction pipe is connected to the intermediate connecting pipe so that an outlet of the intermediate suction pipe faces in a flowing direction of a medium pressure gas refrigerant in the intermediate connecting pipe.Type: ApplicationFiled: August 24, 2009Publication date: March 4, 2010Inventors: Kenshi Ueda, Naoya Morozumi
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Patent number: 7641454Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing that includes first, second and third communication holes separately arranged sequentially in an axial direction on an outer peripheral wall, an accumulator held on an outer side of the housing, a low-pressure connecting pipe that connects a bottom communication hole of the accumulator and the second communication hole, and an intermediate connecting pipe that connects the first and third communication holes. The second and third communication holes are arranged at nearly the same circumferential direction position of the housing. The accumulator is held at nearly the same circumferential direction position as the second communication hole.Type: GrantFiled: September 22, 2008Date of Patent: January 5, 2010Assignee: Fujitsu General LimitedInventors: Kenshi Ueda, Naoya Morozumi
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Publication number: 20090180907Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing in which first, second, third communication holes are provided apart in an axial direction on an outer peripheral wall; an accumulator held at an outside part of the housing; a low-pressure connecting pipe for connecting a bottom communication hole of the accumulator and the second communication hole; and an intermediate connecting pipe for connecting the first and third communication holes. The first and third communication holes are provided nearly in the same locations in the circumferential direction of the housing. The accumulator is held nearly in the same location in the circumferential direction as that of the second communication hole. The second communication hole is provided in a different location in the circumferential direction from those of the first and third communication holes for preventing interference between the low-pressure and intermediate connecting pipes each formed in arc shape.Type: ApplicationFiled: January 7, 2009Publication date: July 16, 2009Inventors: Kenshi Ueda, Naoya Morozumi
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Publication number: 20090180912Abstract: A rotary compressor includes a compressing section including a cylindrical cylinder, two end plates closing both ends of the cylinder, respectively, and a piston held by an eccentric section of a rotary shaft driven to rotate by a motor. A working chamber is formed between the piston and the cylinder inner wall. The rotary compressor also includes a vane protruding from within a vane groove of the cylinder into the working chamber; an airtight compressor housing accommodating therein the compressing section; a suction hole provided in the cylinder and communicating the suction chamber with a low-pressure side of a refrigerating cycle; and a discharge hole provided in one of the end plates and communicating the compression chamber with a high-pressure side of the refrigerating cycle. An auxiliary discharge hole different from the discharge hole is provided in the one end plate.Type: ApplicationFiled: January 7, 2009Publication date: July 16, 2009Inventors: Naoya MOROZUMI, Kenshi Ueda
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Publication number: 20090087321Abstract: A two-stage compression rotary compressor is provided that includes a low-stage compressing section and a high-stage compressing section housed within a cylindrical sealed housing oriented vertically, a low-stage suction pipe that is connected to a suction side of the low-stage compressing section and sucks in a low-pressure refrigerant, a low-stage discharge pipe the is connected to a discharge side of the low-stage compressing section and discharges the refrigerant from the low-stage to outside of the sealed housing, a high-stage suction pipe that is connected to a suction side of the high-stage compressing section and sucks in the refrigerant discharged from the low-stage, a low-pressure connecting pipe that connects the low-stage suction pipe and an accumulator, and guides the refrigerant inside the accumulator to a suction side of a low-stage compressing section, and an intermediate connecting pipe that connects the low-stage discharge pipe and the high-stage suction pipe, wherein an inner diameter of thType: ApplicationFiled: September 22, 2008Publication date: April 2, 2009Inventors: Naoya Morozumi, Kenshi Ueda
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Publication number: 20090081053Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing that includes first, second and third communication holes separately arranged sequentially in an axial direction on an outer peripheral wall, an accumulator held on an outer side of the housing, a low-pressure connecting pipe that connects a bottom communication hole of the accumulator and the second communication hole, and an intermediate connecting pipe that connects the first and third communication holes. The second and third communication holes are arranged at nearly the same circumferential direction position of the housing. The accumulator is held at nearly the same circumferential direction position as the second communication hole.Type: ApplicationFiled: September 22, 2008Publication date: March 26, 2009Inventors: Kenshi Ueda, Naoya Morozumi
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Publication number: 20080236192Abstract: There is provided a rotary compressor in which the pressure loss in a refrigerant suction pipe connecting the compressor and an accumulator to each other is reduced, and the compression efficiency is increased. The inside diameter D2 of a refrigerant suction pipe 64 on the outlet side of the accumulator 6 is made larger than the inside diameter D1 of a refrigerant return pipe 62 on the inlet side thereof (D2>D1).Type: ApplicationFiled: March 6, 2008Publication date: October 2, 2008Applicant: FUJITSU GENERAL LIMITEDInventors: Naoya Morozumi, Kenshi Ueda
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Publication number: 20080240954Abstract: There is provided a two-stage compression rotary compressor in which the balancer mass of a rotor can be made as small as possible, and the moments that tilt the whole of a shaft can be balanced. The axial length L2 of a high-stage side crankshaft 72 corresponding to a high-stage compressing section 32 is longer than the axial length L1 of a low-stage side crankshaft 73 corresponding to a low-stage compressing section 31 (L2>L1).Type: ApplicationFiled: March 6, 2008Publication date: October 2, 2008Applicant: FUJITSU GENERAL LIMITEDInventors: Naoya Morozumi, Kenshi Ueda
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Publication number: 20080236184Abstract: In an injectable two-staged rotary compressor, a second suction pipe includes a heat-exchange promoting unit that promotes heat exchange between intermediary-pressure injected refrigerant and internal space or an external surface of a sealed container. The heat being exchanged by the intermediary-pressure injected refrigerant absorbing heat.Type: ApplicationFiled: March 10, 2008Publication date: October 2, 2008Inventors: Naoya Morozumi, Kenshi Ueda
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Publication number: 20080078191Abstract: A problem to be solved by the present invention is that the temperature of a refrigerant discharged from a compression section can be detected more exactly without being influenced by variable factors existing around the compression section. In a rotary compressor 1 having a motor 6 and a compression section 3 provided in a closed container 2, and also having a discharge pipe 26 provided in an upper part of the closed container 2 to discharge a refrigerant compressed by the compression section 3 to the outside of the closed container 2, a refrigerant discharge part 462 for discharging the refrigerant compressed by the compression section 3 toward the inner peripheral surface of the closed container 2 is provided, and a discharge temperature sensor 20 for detecting the discharge temperature of compressed refrigerant is arranged in a portion opposed to the refrigerant discharge part 462 on the outer peripheral surface side of the closed container 2.Type: ApplicationFiled: August 2, 2007Publication date: April 3, 2008Applicant: FUJITSU GENERAL LIMITEDInventors: Taku Morishita, Naoya Morozumi, Kenshi Ueda
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Patent number: 7331774Abstract: There is provided, at a low cost, a small-size and lightweight scroll compressor capable of preventing a decrease in compression efficiency by utilizing a medium pressure between a suction pressure and a discharge pressure as a back pressure. An independent minute gap in the axial direction is provided between a main frame 3 and a thrust ring 8. This minute gap is used as a second back pressure chamber C2, and the medium pressure between the suction pressure and the discharge pressure is introduced into the second back pressure chamber C2.Type: GrantFiled: May 18, 2006Date of Patent: February 19, 2008Assignee: Fujitsu General LimitedInventors: Kenshi Ueda, Naoya Morozumi
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Publication number: 20060263225Abstract: There is provided, at a low cost, a small-size and lightweight scroll compressor capable of preventing a decrease in compression efficiency by utilizing a medium pressure between a suction pressure and a discharge pressure as a back pressure. An independent minute gap in the axial direction is provided between a main frame 3 and a thrust ring 8. This minute gap is used as a second back pressure chamber C2, and the medium pressure between the suction pressure and the discharge pressure is introduced into the second back pressure chamber C2.Type: ApplicationFiled: May 18, 2006Publication date: November 23, 2006Applicant: FUJITSU GENERAL LIMITEDInventors: Kenshi Ueda, Naoya Morozumi