Patents by Inventor Tetsuzou Ukai
Tetsuzou Ukai 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: 20210080163Abstract: Provided is a control device that performs protection control of a compressor without malfunction. The control device activates protection control on a compressor included in a refrigerant circuit based on a pressure value detected by a pressure sensor that is installed at a low-pressure side of the refrigerant circuit and a change over time of the pressure value.Type: ApplicationFiled: January 18, 2019Publication date: March 18, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Katsuhiro FUJITA, Takahide YAMAMOTO, Tetsuzou UKAI
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Patent number: 8403655Abstract: A scroll compressor that suffers no decrease in compression performance due to leakage resulting from a twisting assembly error is provided. This scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll.Type: GrantFiled: June 28, 2011Date of Patent: March 26, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Patent number: 8313317Abstract: Provided is a scroll fluid machine that, by using a crankshaft manufactured by cold forging and a needle bearing, can sufficiently exhibit the performance of a variable circling radius mechanism, can provide a sufficient reliability on a bearing portion of the crankshaft, and can be manufactured inexpensively. For this purpose, in a crankshaft 60 used for a driving force transmission system, a reinforced shaft unit 63 and a circular column-like large diameter unit 61 are formed at an end of a rotating shaft 16, a material is produced by a cold forging process so that an eccentric shaft 62 projects from the circular column-like large diameter unit 61, the circular column-like large diameter unit 61 is rotatably coupled to a housing 11 via a needle bearing 64, and the variable circling radius mechanism is stably operated with rigidity increased by the reinforced shaft unit 63.Type: GrantFiled: November 29, 2007Date of Patent: November 20, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Tetsuzou Ukai, Kazuhide Watanabe, Tomohisa Moro, Katsuhiro Fujita, Takayuki Kuwahara, Takamitsu Himeno
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Patent number: 8308461Abstract: To provide a scroll compressor capable of reducing a noise occurring in a pin-and-ring type self rotation preventing mechanism and improving compression performance. In a scroll compressor comprising: a fixed scroll member and a revolving scroll member; a driven crank mechanism for driving the revolving scroll member to revolutionary turn; and a pin-and-ring type self rotation preventing mechanism provided in plural places for preventing self rotation of a revolving scroll member, at least one of the self rotation preventing pin, the self rotation preventing ring and the self rotation preventing ring hole, which form the pin-and-ring type self rotation preventing mechanism, is provided with an orbit correction part for reducing a maximum displacement R in a direction of self rotation of the revolving scroll member to smooth a change of an orbit of the revolving scroll member in changing a pin and a ring in a section of prevention of self rotation by means of a corresponding pin and ring part.Type: GrantFiled: November 14, 2008Date of Patent: November 13, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Takahide Ito, Makoto Takeuchi, Norio Hioki, Hideshi Hamamura, Koji Terasaki
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Patent number: 8157553Abstract: In a scroll compressor, a center of a turning scroll body is shifted with respect to a drive central axis so that a distance between a gravity center and the drive central axis in a turning scroll becomes smaller than a predetermined allowable value set based on theoretical displacement and mass of the turning scroll. A moment force about the drive central axis acting on the turning scroll is reduced during revolving, and an alternating force acting on an autorotation preventing pin in the turning scroll is reduced to an allowable level.Type: GrantFiled: November 29, 2007Date of Patent: April 17, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Takahide Ito, Takamitsu Himeno, Tetsuzou Ukai, Kazuhide Watanabe, Katsuhiro Fujita, Tomohisa Moro
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Publication number: 20110256010Abstract: A scroll compressor that suffers no decrease in compression performance due to leakage resulting from a twisting assembly error is provided. This scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll.Type: ApplicationFiled: June 28, 2011Publication date: October 20, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Patent number: 8038421Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll. The relationship between the involute surfaces of the spiral wraps of the two scrolls and the dimensions, dimensional tolerance, and assembly standards of the rotation-preventing mechanism are determined so that the median value of an allowable angle of rotation (?) agrees with an upright position of the orbiting scroll.Type: GrantFiled: February 4, 2008Date of Patent: October 18, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Patent number: 7905716Abstract: A scroll compressor includes an orbiting scroll engaged with a front case by pins and rings or ring holes to prevent rotation of the orbiting scroll. The rings or the ring holes have such an inside diameter that an orbiting radius defined by the pins and the rings or the ring holes is larger than a theoretical orbiting radius defined by engagement between gear surfaces of a fixed scroll and the orbiting scroll. The pins, the rings, or the ring holes are shifted in such a direction as to relieve twisting of the orbiting scroll relative to the fixed scroll.Type: GrantFiled: February 16, 2007Date of Patent: March 15, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Takeuchi, Takahide Ito, Hiroshi Yamazaki, Tetsuzou Ukai, Kazuhide Watanabe, Katsuhiro Fujita, Tomohisa Moro, Takayuki Kuwahara
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Publication number: 20100172781Abstract: To provide a scroll compressor capable of reducing a noise occurring in a pin-and-ring type self rotation preventing mechanism and improving compression performance. In a scroll compressor comprising: a fixed scroll member and a revolving scroll member; a driven crank mechanism for driving the revolving scroll member to revolutionary turn; and a pin-and-ring type self rotation preventing mechanism provided in plural places for preventing self rotation of a revolving scroll member, at least one of the self rotation preventing pin, the self rotation preventing ring and the self rotation preventing ring hole, which form the pin-and-ring type self rotation preventing mechanism, is provided with an orbit correction part for reducing a maximum displacement R in a direction of self rotation of the revolving scroll member to smooth a change of an orbit of the revolving scroll member in changing a pin and a ring in a section of prevention of self rotation by means of a corresponding pin and ring part.Type: ApplicationFiled: November 14, 2008Publication date: July 8, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Takahide Ito, Makoto Takeuchi, Norio Hioki, Hideshi Hamamura, Koji Terasaki
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Publication number: 20100068086Abstract: Provided is a scroll fluid machine that, by using a crankshaft manufactured by cold forging and a needle bearing, can sufficiently exhibit the performance of a variable circling radius mechanism, can provide a sufficient reliability on a bearing portion of the crankshaft, and can be manufactured inexpensively. For this purpose, in a crankshaft 60 used for a driving force transmission system, a reinforced shaft unit 63 and a circular column-like large diameter unit 61 are formed at an end of a rotating shaft 16, a material is produced by a cold forging process so that an eccentric shaft 62 projects from the circular column-like large diameter unit 61, the circular column-like large diameter unit 61 is rotatably coupled to a housing 11 via a needle bearing 64, and the variable circling radius mechanism is stably operated with rigidity increased by the reinforced shaft unit 63.Type: ApplicationFiled: November 29, 2007Publication date: March 18, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Tetsuzou Ukai, Kazuhide Watanabe, Tomohisa Moro, Katsuhiro Fujita, Takayuki Kuwahara, Takamitsu Himeno
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Patent number: 7658600Abstract: There is provided a scroll compressor in which reliability and durability is increased by preventing peeling of a coating layer applied to a thrust plate, to maintain a desired level of lubrication for a long period of time. The scroll compressor has a thrust plate, a coating which is applied to a surface of the thrust plate, a housing having a thrust bearing face to which the thrust plate is attached, an orbiting scroll member having a slide face which is supported by the thrust plate and which orbits while sliding, and a peeling prevention part which reduces a sliding pressure acting on an edge portion of the thrust plate from the slide face.Type: GrantFiled: November 13, 2006Date of Patent: February 9, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Kazuhide Watanabe, Takayuki Kuwahara, Tomohisa Moro, Makoto Takeuchi, Hiroshi Yamazaki, Tetsuzou Ukai
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Publication number: 20100021329Abstract: A scroll compressor that suffers no decrease in compression performance due to leakage resulting from a twisting assembly error is provided. This scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll.Type: ApplicationFiled: February 4, 2008Publication date: January 28, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Publication number: 20100021328Abstract: In a scroll compressor, a center of a turning scroll body is shifted with respect to a drive central axis so that a distance between a gravity center and the drive central axis in a turning scroll becomes smaller than a predetermined allowable value set based on theoretical displacement and mass of the turning scroll. A moment force about the drive central axis acting on the turning scroll is reduced during revolving, and an alternating force acting on an autorotation preventing pin in the turning scroll is reduced to an allowable level.Type: ApplicationFiled: November 29, 2007Publication date: January 28, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Takahide Ito, Takamitsu Himeno, Tetsuzou Ukai, Kazuhide Watanabe, Katsuhiro Fujita, Tomohisa Moro
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Patent number: 7604465Abstract: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a scroll compression mechanism is housed within a housing having a funnel shaped, a compression mechanism main body of the scroll compression mechanism is arranged in a wide opening section of a front housing, and a compression mechanism driving section is arranged in a narrow section, a concave section is formed on the outside of a thrust receiving surface which is positioned on a bottom surface of the wide opening section and which supports the compression mechanism.Type: GrantFiled: February 1, 2007Date of Patent: October 20, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Tomohisa Moro, Takayuki Kuwahara, Kazuhide Watanabe, Tetsuzou Ukai, Norio Hioki, Hiroshi Yamazaki, Makoto Takeuchi, Takamitsu Himeno
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Publication number: 20070292293Abstract: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a scroll compression mechanism 23 is housed within a housing 3 having a funnel shaped, a compression mechanism main body of the scroll compression mechanism 23 is arranged in a wide opening section of a front housing 5, and a compression mechanism driving section is arranged in a narrow section, a concave section 51 is formed on the outside of a thrust receiving surface 5B which is positioned on a bottom surface of the wide opening section and which supports the compression mechanism.Type: ApplicationFiled: February 1, 2007Publication date: December 20, 2007Inventors: Katsuhiro Fujita, Tomohisa Moro, Takayuki Kuwahara, Kazuhide Watanabe, Tetsuzou Ukai, Norio Hioki, Hiroshi Yamazaki, Makoto Takeuchi, Takamitsu Himeno
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Publication number: 20070292294Abstract: There is provided a scroll compressor in which reliability and durability is increased by preventing peeling of a coating layer applied to a thrust plate, to maintain a desired level of lubrication for a long period of time. A scroll compressor 1 comprises a thrust plate 51, a coating which is applied to a surface of the thrust plate, a housing 3 having a thrust bearing face 5B to which the thrust plate 51 is attached, an orbiting scroll member 27 having a slide face 61 which is supported by the thrust plate 51 and which orbits while sliding, and a peeling prevention part which reduces a sliding pressure acting on an edge portion 51C of the thrust plate 51 from the slide face 61.Type: ApplicationFiled: November 13, 2006Publication date: December 20, 2007Inventors: Katsuhiro Fujita, Kazuhide Watanabe, Takayuki Kuwahara, Tomohisa Moro, Makoto Takeuchi, Hiroshi Yamazaki, Tetsuzou Ukai
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Publication number: 20070253853Abstract: A scroll compressor includes an orbiting scroll engaged with a front case by pins and rings or ring holes to prevent rotation of the orbiting scroll. The rings or the ring holes have such an inside diameter that an orbiting radius defined by the pins and the rings or the ring holes is larger than a theoretical orbiting radius defined by engagement between gear surfaces of a fixed scroll and the orbiting scroll. The pins, the rings, or the ring holes are shifted in such a direction as to relieve twisting of the orbiting scroll relative to the fixed scroll.Type: ApplicationFiled: February 16, 2007Publication date: November 1, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Makoto TAKEUCHI, Takahide ITO, Hiroshi YAMAZAKI, Tetsuzou UKAI, Kazuhide WATANABE, Katsuhiro FUJITA, Tomohisa MORO, Takayuki KUWAHARA
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Patent number: 6860728Abstract: A scroll compressor comprises a fixed scroll having a spiral-shaped wall body, and a swiveling scroll which has a spiral-shaped wall body and revolves while linking together the two wall bodies; the wall bodies have steps, and side faces of two end plates have high and low bottom faces in correspondence with the steps; a tip seal is provided along a join edge which connects top edges on different sides of each step, and a mechanism is provided therebetween to prevent the tip seals from becoming removed from the join edges. Furthermore, in the same scroll compressor, tip seals are provided respectively in two grooves, and join paths are provided respectively between a high-pressure compression chamber, which is formed with the bottom faces as one section, and the two grooves; the pressure inside the high-pressure compression chamber is used as a pressing force for the tip seals.Type: GrantFiled: April 16, 2003Date of Patent: March 1, 2005Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Takeuchi, Takahide Itoh, Yasuharu Maruiwa, Hiroshi Yamazaki, Takayuki Hagita, Tetsuzou Ukai, Katsuhiro Fujita
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Patent number: 6695598Abstract: A scroll compressor comprises a fixed scroll member and a revolving scroll member that engage with each other with their centrifugal walls, wherein the revolving scroll member is supported to revolve with respect to the fixed scroll member, but to avoid self-rotation thereof. The spiral-starting portion of the centrifugal wall comprises non-stepped portions formed along curves of &bgr;1-&bgr;1′ and &bgr;2-&bgr;2′ respectively, and a stepped portion formed along a curve &bgr;1′-&bgr;2′ that provides a thickness increase area encompassed by its upper-side curved surface and its lower-side curved surface. The discharge port is located on the end board of the fixed scroll member to partly overlap with the thickness increase area by partly hollowing the lower side of the stepped portion with the prescribed height.Type: GrantFiled: January 9, 2002Date of Patent: February 24, 2004Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Takahide Itoh, Makoto Takeuchi, Tetsuzou Ukai, Hiroshi Ogawa, Shigeki Miura, Yasuhiro Wada, Yasuharu Maruiwa, Kou Tanaka
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Publication number: 20030194341Abstract: A scroll compressor comprises a fixed scroll having a spiral-shaped wall body, and a swiveling scroll which has a spiral-shaped wall body and revolves while linking together the two wall bodies; the wall bodies have steps, and side faces of two end plates have high and low bottom faces in correspondence with the steps; a tip seal is provided along a join edge which connects top edges on different sides of each step, and a mechanism is provided therebetween to prevent the tip seals from becoming removed from the join edges. Furthermore, in the same scroll compressor, tip seals are provided respectively in two grooves, and join paths are provided respectively between a high-pressure compression chamber, which is formed with the bottom faces as one section, and the two grooves; the pressure inside the high-pressure compression chamber is used as a pressing force for the tip seals.Type: ApplicationFiled: April 16, 2003Publication date: October 16, 2003Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Makoto Takeuchi, Takahide Itoh, Yasuharu Maruiwa, Hiroshi Yamazaki, Takayuki Hagita, Tetsuzou Ukai, Katsuhiro Fujita