Patents by Inventor Hideto Nakao
Hideto Nakao 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: 20240106017Abstract: A lead-acid battery management system and a lead-acid battery management program are described that appropriately manage bipolar lead-acid batteries to reduce a degree to which the lead-acid batteries impose a load on environment as much as possible and are necessary to cause a circulation cycle from manufacturing to reuse to reliably function. A lead-acid battery system includes multiple bipolar lead-acid batteries and a management and support apparatus configured to manage the lead-acid battery system. The management and support apparatus includes a recording unit configured to record operation history information of the bipolar lead-acid batteries and a state determination unit configured to determine necessity of replacement of respective ones of the bipolar lead-acid batteries.Type: ApplicationFiled: December 6, 2023Publication date: March 28, 2024Inventors: Noriyasu Iwane, Kanichiro Yamamoto, Tomoyuki Aogaki, Masanobu Aragaki, Hideto Nakamura, Kengo Nakao
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Patent number: 11920841Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, a flow switching device, an indoor heat exchanger, a pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, a bypass pipe, a flow control device provided to the bypass pipe and configured to adjust a flow rate of refrigerant flowing through the bypass pipe, an evaporating pressure sensor configured to measure an evaporating pressure of the refrigerant, and a controller. The air-conditioning apparatus is configured to operate in a normal heating operation mode and a heating-defrosting operation mode. When an operation associated with the normal heating operation mode is switched to an operation associated with the heating-defrosting operation mode, the controller adjusts an opening degree of the flow control device using the evaporating pressure in the parallel heat exchanger and a driving frequency of the compressor.Type: GrantFiled: March 25, 2019Date of Patent: March 5, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shohei Ishimura, Soshi Ikeda, Kazuya Watanabe, Hideto Nakao, Masakazu Kondo, Yasuhide Hayamaru, Yusuke Tashiro, Masakazu Sato, Atsushi Kawashima
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Publication number: 20220107123Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, a flow switching device, an indoor heat exchanger, a pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, a bypass pipe, a flow control device provided to the bypass pipe and configured to adjust a flow rate of refrigerant flowing through the bypass pipe, an evaporating pressure sensor configured to measure an evaporating pressure of the refrigerant, and a controller. The air-conditioning apparatus is configured to operate in a normal heating operation mode and a heating-defrosting operation mode. When an operation associated with the normal heating operation mode is switched to an operation associated with the heating-defrosting operation mode, the controller adjusts an opening degree of the flow control device using the evaporating pressure in the parallel heat exchanger and a driving frequency of the compressor.Type: ApplicationFiled: March 25, 2019Publication date: April 7, 2022Applicant: Mitsubishi Electric CorporationInventors: Shohei ISHIMURA, Soshi IKEDA, Kazuya WATANABE, Hideto NAKAO, Masakazu KONDO, Yasuhide HAYAMARU, Yusuke TASHIRO, Masakazu SATO, Atsushi KAWASHIMA
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Patent number: 11268743Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, a load side heat exchanger, a first pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, a bypass pipe diverting a portion of refrigerant discharged by the compressor, a flow switching unit connecting a parallel heat exchanger to be defrosted to the bypass pipe, a plurality of flow rate control devices controlling flow rates of refrigerant flowing through the plurality of parallel heat exchangers, and a controller which controls, in the heating-defrosting operation mode or in the heating operation mode after execution of the heating-defrosting operation mode, the flow rate control devices to control, in accordance with a frost state of a parallel heat exchanger functioning as an evaporator among the plurality of parallel heat exchangers, the flow rate of refrigerant flowing through the parallel heat exchanger.Type: GrantFiled: March 7, 2018Date of Patent: March 8, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kazuya Watanabe, Soshi Ikeda, Shohei Ishimura, Hideto Nakao
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Patent number: 11092362Abstract: A compressor of an air-conditioning device includes a scroll mechanism unit having a fixed scroll and an orbiting scroll that cooperates with the fixed scroll to compress refrigerant. There is a first space portion provided between the scroll mechanism unit and an electric motion unit; an annular second space portion provided in a circumference of the scroll mechanism unit in a radial direction; a communication path provided between the first space portion and the second space portion, to guide, to the second space portion, the refrigerant sucked from the suction pipe to the first space portion. A part of the refrigerant between the first expansion valve and the second expansion valve is injected simultaneously to the first space portion and the second space portion.Type: GrantFiled: April 24, 2017Date of Patent: August 17, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Jun Nishio, Naofumi Takenaka, Soshi Ikeda, Raito Kawamura, Hideto Nakao, Katsuhiro Ishimura
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Publication number: 20200325373Abstract: An air-conditioning apparatus includes a refrigerant circuit in which a compressor, a condenser, an expansion unit, and an evaporator are connected by a pipe and through which a working fluid obtained by adding a stabilizer to a refrigerant mixture containing CF3I flows. The pipe includes a riser gas pipe erected and extending from an outlet of the evaporator to an inlet of the condenser via the compressor. An inner diameter of the riser gas pipe is smaller than or equal to an upper-limit threshold value.Type: ApplicationFiled: June 12, 2018Publication date: October 15, 2020Applicant: Mitsubishi Electric CorporationInventors: Jun NISHIO, Soshi IKEDA, Hideto NAKAO, Katsuhiro ISHIMURA
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Publication number: 20200284476Abstract: A compressor of an air-conditioning device includes a scroll mechanism unit having a fixed scroll and an orbiting scroll that cooperates with the fixed scroll to compress refrigerant; an electric motion unit that provides revolution movement to the orbiting scroll; a first space portion provided between the scroll mechanism unit and the electric motion unit; an annular second space portion provided in a circumference of the scroll mechanism unit in a radial direction; a suction pipe connected to the first space portion, from which the refrigerant is sucked into the compressor; a communication path provided between the first space portion and the second space portion, to guide, to the second space portion, the refrigerant sucked from the suction pipe to the first space portion; and a discharge pipe that discharges, to outside of the compressor, the refrigerant that flows from the second space portion into the scroll mechanism unit and is compressed, and a part of the refrigerant between the first expansion valType: ApplicationFiled: April 24, 2017Publication date: September 10, 2020Applicant: Mitsubishi Electric CorporationInventors: Jun NISHIO, Naofumi TAKENAKA, Soshi IKEDA, Raito KAWAMURA, Hideto NAKAO, Katsuhiro ISHIMURA
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Publication number: 20200232693Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, a load side heat exchanger, a first pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, a bypass pipe diverting a portion of refrigerant discharged by the compressor, a flow switching unit connecting a parallel heat exchanger to be defrosted to the bypass pipe, a plurality of flow rate control devices controlling flow rates of refrigerant flowing through the plurality of parallel heat exchangers, and a controller which controls, in the heating-defrosting operation mode or in the heating operation mode after execution of the heating-defrosting operation mode, the flow rate control devices to control, in accordance with a frost state of a parallel heat exchanger functioning as an evaporator among the plurality of parallel heat exchangers, the flow rate of refrigerant flowing through the parallel heat exchanger.Type: ApplicationFiled: March 7, 2018Publication date: July 23, 2020Applicant: Mitsubishi Electric CorporationInventors: Kazuya WATANABE, Soshi IKEDA, Shohei ISHIMURA, Hideto NAKAO
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Patent number: 9127675Abstract: A vane compressor including plural vanes that perform a compression operation such that the normal to a circular arc formed by each vane tip portion and the normal to the inner peripheral surface of a cylinder are constantly approximately coincident with each other. Each of the plural vanes is held constantly in the normal direction of the inner peripheral surface of the cylinder or is held constantly along a direction having a fixed inclination with respect to the normal direction of the inner peripheral surface of the cylinder so that the compression operation is performed in the state the normal to the circular arc formed by the tip portion of each of the plural vanes and the normal to the inner peripheral surface of the cylinder are constantly approximately coincident with each other. The plural vanes are rotatably and movably supported with respect to a rotor portion.Type: GrantFiled: August 2, 2011Date of Patent: September 8, 2015Assignee: Mitsubishi Electric CorporationInventors: Shin Sekiya, Hideaki Maeyama, Shinichi Takahashi, Hirotsugu Hayashi, Tetsuhide Yokoyama, Tatsuya Sasaki, Hideto Nakao
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Patent number: 9115716Abstract: There is provided a vane compressor with a plurality of vanes having a structure in which a rotor portion and a rotary shaft are unitarily formed so as to reduce bearing sliding loss of the rotary shaft and reduce gas leakage loss by narrowing a space formed between the rotor portion and the inner peripheral surface of a cylinder.Type: GrantFiled: August 2, 2011Date of Patent: August 25, 2015Assignee: Mitsubishi Electric CorporationInventors: Shin Sekiya, Hideaki Maeyama, Shinichi Takahashi, Tetsuhide Yokoyama, Tatsuya Sasaki, Hideto Nakao, Hirotsugu Hayashi
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Patent number: 8602760Abstract: A vane compressor according to the present invention, including a cylinder which is approximately cylindrical and whose both ends located in an axial direction are open, a cylinder head and a frame which close both the ends of the cylinder, a rotor shaft which includes a rotor part being cylindrical and rotating in the cylinder and a shaft part transmitting torque to the rotor part, and a vane which is installed in the rotor part and whose tip portion has the R-shape facing outward, performs the compression operation in the state where the normal to the R-shape of the tip portion of the vane and the normal to the inner surface of the cylinder are always approximately coincident with each other.Type: GrantFiled: April 12, 2011Date of Patent: December 10, 2013Assignee: Mitsubishi Electric CorporationInventors: Hideaki Maeyama, Shinichi Takahashi, Shin Sekiya, Tetsuhide Yokoyama, Hideto Nakao, Tatsuya Sasaki, Hirotsugu Hayashi
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Publication number: 20130149178Abstract: A vane compressor including plural vanes that perform a compression operation such that the normal to a circular arc formed by each vane tip portion and the normal to the inner peripheral surface of a cylinder are constantly approximately coincident with each other. Each of the plural vanes is held constantly in the normal direction of the inner peripheral surface of the cylinder or is held constantly along a direction having a fixed inclination with respect to the normal direction of the inner peripheral surface of the cylinder so that the compression operation is performed in the state the normal to the circular arc formed by the tip portion of each of the plural vanes and the normal to the inner peripheral surface of the cylinder are constantly approximately coincident with each other. The plural vanes are rotatably and movably supported with respect to a rotor portion.Type: ApplicationFiled: August 2, 2011Publication date: June 13, 2013Applicant: Mitsubishi Electric CorporationInventors: Shin Sekiya, Hideaki Maeyama, Shinichi Takahashi, Tetsuhide Yokoyama, Tatsuya Sasaki, Hideto Nakao, Hirotsugu Hayashi
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Publication number: 20130064705Abstract: There is provided a vane compressor with a plurality of vanes having a structure in which a rotor portion and a rotary shaft are unitarily formed so as to reduce bearing sliding loss of the rotary shaft and reduce gas leakage loss by narrowing a space formed between the rotor portion and the inner peripheral surface of a cylinder.Type: ApplicationFiled: August 2, 2011Publication date: March 14, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shin Sekiya, Hideaki Maeyama, Shinichi Takahashi, Tetsuhide Yokoyama, Tatsuya Sasaki, Hideto Nakao, Hirotsugu Hayashi
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Publication number: 20120009078Abstract: A vane compressor according to the present invention, including a cylinder which is approximately cylindrical and whose both ends located in an axial direction are open, a cylinder head and a frame which close both the ends of the cylinder, a rotor shaft which includes a rotor part being cylindrical and rotating in the cylinder and a shaft part transmitting torque to the rotor part, and a vane which is installed in the rotor part and whose tip portion has the R-shape facing outward, performs the compression operation in the state where the normal to the R-shape of the tip portion of the vane and the normal to the inner surface of the cylinder are always approximately coincident with each other.Type: ApplicationFiled: April 12, 2011Publication date: January 12, 2012Applicant: Mitsubishi Electric CorporationInventors: Hideaki Maeyama, Shinichi Takahashi, Masahiro Hayashi, Shin Sekiya, Tetsuhide Yokoyama, Hideto Nakao, Tatsuya Sasaki, Hirotsugu Hayashi
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Patent number: 6189322Abstract: A refrigerant-circulating system which comprises a refrigeration cycle comprising a refrigerant compressor, a condenser, an expansion mechanism and an evaporator to form a refrigerant circuit and employing a refrigerant which contains no chlorine, wherein an aromatic polyether oil having as a base oil structure a benzene ring having an ether bond is employed as a refrigerator oil.Type: GrantFiled: March 11, 1999Date of Patent: February 20, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Keisaku Ishihara, Yoshinori Shirafuji, Shin Sekiya, Noboru Masuda, Takeshi Izawa, Hideto Nakao, Makoto Tsukiji, Shinsuke Miki