Patents by Inventor Hiroyuki Sawabe
Hiroyuki Sawabe 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: 8277202Abstract: There is disclosed a multicylindrical rotary compressor capable of improving an operation efficiency during a small-capacity operation, the compressor comprises a controller as a control unit which adjusts a rotation number of an electromotive element as a driving element and which controls an operation of a power saving mechanism, and the controller operates the power saving mechanism to connect a high-pressure chamber side of a first cylinder to a low-pressure chamber side of a second cylinder during the small-capacity operation of a refrigerant circuit constituted in a rotary compressor (the multicylindrical rotary compressor).Type: GrantFiled: December 8, 2005Date of Patent: October 2, 2012Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Masayuki Hara, Hiroyuki Sawabe
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Patent number: 7850436Abstract: A structure and method for fixing an upper cup muffler to an upper bearing portion. The upper bearing portion includes a step portion having an upper, lower and side surfaces. A peripheral edge portion between the upper and side surfaces of the upper bearing portion is declined outwardly to have a slant surface. The upper cup muffler includes a bottom surface and a peripheral side surface lower portion that extends downwardly from the edge portion of the bottom surface. The peripheral side surface lower portion gets across the slant surface of the upper bearing portion and is brought into linear or planar contact with at least one of the outer side surface and the lower surface of the step portion when the bottom surface of the upper cup muffler and the upper surface of the upper bearing portion are fixed to each other.Type: GrantFiled: March 24, 2006Date of Patent: December 14, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroyuki Sawabe, Yoshiaki Hiruma, Hiroyuki Yoshida
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Patent number: 7632082Abstract: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.Type: GrantFiled: January 11, 2008Date of Patent: December 15, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Hirotsugu Ogasawara, Takahiro Nishikawa, Yoshihisa Kogure, Masayuki Hara, Hiroyuki Sawabe, Yoshiaki Hiruma
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Patent number: 7585162Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: April 15, 2008Date of Patent: September 8, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Patent number: 7585163Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: April 15, 2008Date of Patent: September 8, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Patent number: 7572116Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: April 15, 2008Date of Patent: August 11, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Patent number: 7524174Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: GrantFiled: July 6, 2005Date of Patent: April 28, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Publication number: 20080298993Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: ApplicationFiled: April 15, 2008Publication date: December 4, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Publication number: 20080206071Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: ApplicationFiled: April 15, 2008Publication date: August 28, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Publication number: 20080199325Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: ApplicationFiled: April 15, 2008Publication date: August 21, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Publication number: 20080112831Abstract: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.Type: ApplicationFiled: January 11, 2008Publication date: May 15, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Hirotsugu Ogasawara, Takahiro Nishikawa, Yoshihisa Kogure, Masayuki Hara, Hiroyuki Sawabe, Yoshiaki Hiruma
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Publication number: 20060222511Abstract: There is disclosed a multicylindrical rotary compressor capable of improving an operation efficiency during a small-capacity operation, the compressor comprises a controller as a control unit which adjusts a rotation number of an electromotive element as a driving element and which controls an operation of a power saving mechanism, and the controller operates the power saving mechanism to connect a high-pressure chamber side of a first cylinder to a low-pressure chamber side of a second cylinder during the small-capacity operation of a refrigerant circuit constituted in a rotary compressor (the multicylindrical rotary compressor).Type: ApplicationFiled: December 8, 2005Publication date: October 5, 2006Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Masayuki Hara, Hiroyuki Sawabe
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Publication number: 20060216160Abstract: In fixing structure and method for fixing an upper cup muffler (7) to an upper bearing portion (6) for sealing the opening of an upper cylinder (3) in a hermetically sealed compressor, the upper bearing portion (6) includes a step portion having an upper surface, a lower surface (6C) and a side surface (6B) between the upper and lower surfaces, the peripheral edge portion between the upper and side surfaces of the upper bearing portion is declined outwardly to have a slant surface (6A), and the upper cup muffler (7) includes a bottom surface (7C) and a peripheral side surface lower portion (7D) that extends downwardly from the edge portion of the bottom surface (7c) of the upper cup muffler (7).Type: ApplicationFiled: March 24, 2006Publication date: September 28, 2006Applicant: Sanyo Electric Co., Ltd.Inventors: Hiroyuki Sawabe, Yoshiaki Hiruma, Hiroyuki Yoshida
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Publication number: 20060210407Abstract: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.Type: ApplicationFiled: March 16, 2006Publication date: September 21, 2006Applicant: Sanyo Electric Co., Ltd.Inventors: Hirotsugu Ogasawara, Takahiro Nishikawa, Yoshihisa Kogure, Masayuki Hara, Hiroyuki Sawabe, Yoshiaki Hiruma
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Publication number: 20060008360Abstract: An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.Type: ApplicationFiled: July 6, 2005Publication date: January 12, 2006Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takahiro Nishikawa, Hirotsugu Ogasawara, Akihiro Suda, Masayuki Hara, Hiroyuki Sawabe, Hiroyuki Yoshida, Akira Hashimoto
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Publication number: 20040076537Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.Type: ApplicationFiled: October 9, 2003Publication date: April 22, 2004Inventors: Kenzo Matsumoto, Akira Hashimoto, Midori Futakawame, Masazumi Sakaniwa, Hiroyuki Sawabe
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Patent number: 6692242Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.Type: GrantFiled: July 19, 2002Date of Patent: February 17, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Akira Hashimoto, Midori Futakawame, Masazumi Sakaniwa, Hiroyuki Sawabe
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Patent number: 6676393Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.Type: GrantFiled: July 19, 2002Date of Patent: January 13, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Akira Hashimoto, Midori Futakawame, Masazumi Sakaniwa, Hiroyuki Sawabe
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Patent number: 6524086Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.Type: GrantFiled: August 23, 2001Date of Patent: February 25, 2003Assignee: Sanyo Electric Co., Ltd.Inventors: Kenzo Matsumoto, Akira Hashimoto, Midori Futakawame, Masazumi Sakaniwa, Hiroyuki Sawabe
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Publication number: 20020182096Abstract: An object of the present invention is to provide a multi-cylinder rotary compressor which can enhance the reliability by improving the compression efficiency/mechanical efficiency. The bearings are fixed on the inner wall of the closed container, the cylinders are fixed to the bearings, and a gap is formed between the respective cylinders and the inner wall of the closed container. The design with the relatively large internal volume of the closed container is possible, and the reliability can be enhanced. Further, improvement in the compression efficiency and the mechanical efficiency can be achieved with the compact multi-cylinder rotary compression element.Type: ApplicationFiled: July 19, 2002Publication date: December 5, 2002Applicant: Sanyo Electric Co. Ltd.Inventors: Kenzo Matsumoto, Akira Hashimoto, Midori Futakawame, Masazumi Sakaniwa, Hiroyuki Sawabe