Patents by Inventor Shigehiro Sato
Shigehiro Sato 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: 10591188Abstract: A refrigeration cycle device includes a refrigeration cycle formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other. As a refrigerant in the refrigeration cycle, a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used. A degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor.Type: GrantFiled: May 8, 2015Date of Patent: March 17, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fuminori Sakima, Akira Fujitaka, Shigehiro Sato, Kenji Takaichi, Yoshikazu Kawabe, Hiroaki Nakai
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Patent number: 10590934Abstract: The present invention includes a refrigeration cycle circuit that includes compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger that are connected to each other. A working fluid containing R1123 (1,1,2-trifluoroethylene) and R32 (difluoromethane) is used as a refrigerant sealed in the refrigeration cycle circuit, and an electric motor driving device that drives an electric motor of compressor includes a rotational speed estimator. The rotational speed estimator estimates rotational speed based on information on a detection value of an electric current input to the electric motor or a magnetic pole position of a rotor that constitutes the electric motor.Type: GrantFiled: June 7, 2016Date of Patent: March 17, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fuminori Sakima, Akira Fujitaka, Hiroaki Nakai, Akihiro Kyogoku, Hideaki Matsuo, Shigehiro Sato, Kenji Takaichi
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Patent number: 10215451Abstract: A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyol ester oil as a compressor lubricating oil. In addition, a fixed scroll and a revolving scroll each having a spiral lap rising from an end plate, and a compression chamber which is formed by meshing the fixed scroll and the revolving scroll, are provided. In addition, a discharge hole which is provided at a center position of the end plate of the fixed scroll, and is open to a discharge chamber, a bypass hole which is provided in the end plate of the fixed scroll, and communicates with the compression chamber and the discharge chamber at a timing different from a timing at which the compression chamber communicates with the discharge hole, and a check valve which is provided in the bypass hole, and allows a flow from the compression chamber side to the discharge chamber side.Type: GrantFiled: April 27, 2015Date of Patent: February 26, 2019Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akira Fujitaka, Fuminori Sakima, Yoshikazu Kawabe, Atsushi Sakuda, Hiroaki Nakai, Shigehiro Sato, Kenji Takaichi
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Patent number: 10151514Abstract: A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyol ester oil as a compressor lubricating oil. In addition, a fixed scroll and a revolving scroll each having a spiral lap rising from an end plate, and a compression chamber which is formed by meshing the fixed scroll and the revolving scroll, are provided. In addition, a discharge hole which is provided at a center position of the end plate of the fixed scroll, and is open to a discharge chamber, a bypass hole which is provided in the end plate of the fixed scroll, and communicates with the compression chamber and the discharge chamber at a timing different from a timing at which the compression chamber communicates with the discharge hole, and a check valve which is provided in the bypass hole, and allows a flow from the compression chamber side to the discharge chamber side.Type: GrantFiled: April 27, 2015Date of Patent: December 11, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akira Fujitaka, Fuminori Sakima, Yoshikazu Kawabe, Atsushi Sakuda, Hiroaki Nakai, Shigehiro Sato, Kenji Takaichi
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Patent number: 10077922Abstract: A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyvinyl ether oil as a compressor lubricating oil. In addition, a fixed scroll (12) and a revolving scroll (13) each having a spiral lap rising from an end plate, and a compression chamber (15) which is formed by meshing the fixed scroll (12) and the revolving scroll (13), are provided. In addition, a discharge hole (18) which is provided at a center position of the end plate of the fixed scroll (12), and is open to a discharge chamber (31), a bypass hole (68) which is provided in the end plate of the fixed scroll (12), and communicates with the compression chamber (15) and the discharge chamber (31) at a timing different from a timing at which the compression chamber (15) communicates with the discharge hole (18), and a check valve which is provided in the bypass hole (68), and allows a flow from the compression chamber (15) side to the discharge chamber (31) side.Type: GrantFiled: April 27, 2015Date of Patent: September 18, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akira Fujitaka, Fuminori Sakima, Yoshikazu Kawabe, Atsushi Sakuda, Hiroaki Nakai, Shigehiro Sato, Kenji Takaichi
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Publication number: 20180156217Abstract: The present invention includes a refrigeration cycle circuit that includes compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger that are connected to each other. A working fluid containing R1123 (1,1,2-trifluoroethylene) and R32 (difluoromethane) is used as a refrigerant sealed in the refrigeration cycle circuit, and an electric motor driving device that drives an electric motor of compressor includes a rotational speed estimator. The rotational speed estimator estimates rotational speed based on information on a detection value of an electric current input to the electric motor or a magnetic pole position of a rotor that constitutes the electric motor.Type: ApplicationFiled: June 7, 2016Publication date: June 7, 2018Inventors: FUMINORI SAKIMA, AKIRA FUJITAKA, HIROAKI NAKAI, AKIHIRO KYOGOKU, HIDEAKI MATSUO, SHIGEHIRO SATO, KENJI TAKAICHI
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Publication number: 20170146265Abstract: A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyvinyl ether oil as a compressor lubricating oil. In addition, a fixed scroll and a revolving scroll each having a spiral lap rising from an end plate, and a compression chamber which is formed by meshing the fixed scroll and the revolving scroll, are provided. In addition, a discharge hole which is provided at a center position of the end plate of the fixed scroll, and is open to a discharge chamber, a bypass hole which is provided in the end plate of the fixed scroll, and communicates with the compression chamber and the discharge chamber at a timing different from a timing at which the compression chamber communicates with the discharge hole, and a check valve which is provided in the bypass hole, and allows a flow from the compression chamber side to the discharge chamber side.Type: ApplicationFiled: April 27, 2015Publication date: May 25, 2017Inventors: Akira FUJITAKA, Fuminori SAKIMA, Yoshikazu KAWABE, Atsushi SAKUDA, Hiroaki NAKAI, Shigehiro SATO, Kenji TAKAICHI
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Publication number: 20170138641Abstract: A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyol ester oil as a compressor lubricating oil. In addition, a fixed scroll and a revolving scroll each having a spiral lap rising from an end plate, and a compression chamber which is formed by meshing the fixed scroll and the revolving scroll, are provided. In addition, a discharge hole which is provided at a center position of the end plate of the fixed scroll, and is open to a discharge chamber, a bypass hole which is provided in the end plate of the fixed scroll, and communicates with the compression chamber and the discharge chamber at a timing different from a timing at which the compression chamber communicates with the discharge hole, and a check valve which is provided in the bypass hole, and allows a flow from the compression chamber side to the discharge chamber side.Type: ApplicationFiled: April 27, 2015Publication date: May 18, 2017Inventors: Akira FUJITAKA, Fuminori SAKIMA, Yoshikazu KAWABE, Atsushi SAKUDA, Hiroaki NAKAI, Shigehiro SATO, Kenji TAKAICHI
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Publication number: 20170138645Abstract: A refrigeration cycle device includes a refrigeration cycle formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other. As a refrigerant in the refrigeration cycle, a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used. A degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor. With such a configuration, it is possible to provide highly reliable refrigeration cycle device by suppressing occurrence of a disproportionation reaction of R1123.Type: ApplicationFiled: May 8, 2015Publication date: May 18, 2017Inventors: Fuminori SAKIMA, Akira FUJITAKA, Shigehiro SATO, Kenji TAKAICHI, Yoshikazu KAWABE, Hiroaki NAKAI
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Patent number: 8992793Abstract: Use of a double bond-containing hydrofluoroolefin refrigerant causes a problem that it generates hydrogen fluoride by cleavage and decomposition under influence of oxygen, leading to degradation of the materials and the refrigeration oil used in the refrigeration apparatus and causing troubles in the refrigeration apparatus. It is possible to provide a high-reliability longer-lasting refrigeration apparatus by inexpensive method, by using a double bond-containing hydrofluoroolefin refrigerant in a refrigerating cycle having a refrigerant circulation route extending from a compressor 1, via a condenser 2, an expansion mechanism 3, and an evaporator 4, back to the compressor 1 that contains an ester-based refrigeration oil containing an unsaturated fatty acid as a constituent fatty acid.Type: GrantFiled: July 28, 2010Date of Patent: March 31, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Shigehiro Sato, Kenji Takaichi
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Publication number: 20130167580Abstract: In a compressor, a single refrigerant of hydrofluoroolefin having a double bond of carbon or a mixed refrigerant containing hydrofluoroolefin and hydrofluorocarbon having no double bond of carbon is used, and moreover a refrigerating machine oil containing an additive for suppressing deterioration of the refrigerating machine oil and an antiwear agent is used, the compressor including a sliding portion which is exposed to the mixed refrigerant and the refrigerating machine oil and which has a hardness of 47-55 HRC. Thus, decomposition and polymerization of the refrigerant and the refrigerating machine oil can be inhibited (i.e., occurrence of sludge can be inhibited), and antiwear property of sliding portions, e.g. vane and piston, of the compressor can be maintained. As a result, reliability of the compressor and the refrigerating cycle apparatus using the compressor can be ensured.Type: ApplicationFiled: September 6, 2011Publication date: July 4, 2013Applicant: PANASONIC CORPORATIONInventors: Yoshinori Ishida, Noboru Iida, Shingo Oyagi, Shigehiro Sato
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Publication number: 20120304687Abstract: Use of a double bond-containing hydrofluoroolefin refrigerant causes a problem that it generates hydrogen fluoride by cleavage and decomposition under influence of oxygen, leading to degradation of the materials and the refrigeration oil used in the refrigeration apparatus and causing troubles in the refrigeration apparatus. It is possible to provide a high-reliability longer-lasting refrigeration apparatus by inexpensive method, by using a double bond-containing hydrofluoroolefin refrigerant in a refrigerating cycle having a refrigerant circulation route extending from a compressor 1, via a condenser 2, an expansion mechanism 3, and an evaporator 4, back to the compressor 1 that contains an ester-based refrigeration oil containing an unsaturated fatty acid as a constituent fatty acid.Type: ApplicationFiled: July 28, 2010Publication date: December 6, 2012Applicant: PANASONIC CORPORATIONInventors: Shigehiro Sato, Kenji Takaichi
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Publication number: 20040112812Abstract: A scale removing operation of the heat exchange means or a regenerating operation of ion removing means is carried out using electrolytic water, thereby reducing the water processing amount. The present invention provides a water heater capable of preventing deterioration of performance caused by adhesion of scale, capable of preventing a trouble caused by clogging, and capable of increasing the lifetime. The water heater comprising a heat source, heat exchange means for heating supplied water, and electrolytic water generating means, wherein a removing operation of scale having salt as main ingredient deposited in a water pipe of the heat exchange means is carried out using produced water of the electrolytic water generating means.Type: ApplicationFiled: December 8, 2003Publication date: June 17, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshikazu Kawabe, Kazuo Nakatani, Yuji Inoue, Noriho Okaza, Shigehiro Sato
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Patent number: 6487868Abstract: To provide an air conditioner having an antibacterial and mold-proofing member which can be easily incorporated and has high effectiveness and a method for controlling the air conditioner. An air conditioner of the present invention having a heat exchanger and a blower for supplying the heat exchanger with air comprises an antibacterial and mold-proofing member which includes an antibacterial and mold-proofing component which will volatile at an ambient temperature and diffuse in the air conditioner, and also has a control mechanism for gradually evaporating which controls the release rate of the antibacterial and mold-proofing component to the inside of the air conditioner so that it becomes large at high humidity and small at low humidity.Type: GrantFiled: February 8, 2001Date of Patent: December 3, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shigehiro Sato, Shiho Furuya, Masahiro Watanabe, Toshiyuki Imasaka, Eiji Nakatsuno
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Publication number: 20010023593Abstract: To provide an air conditioner having an antibacterial and mold-proofing member which can be easily incorporated and has high effectiveness and a method for controlling the air conditioner. An air conditioner of the present invention having a heat exchanger and a blower for supplying the heat exchanger with air comprises an antibacterial and mold-proofing member which includes an antibacterial and mold-proofing component which will volatile at an ambient temperature and diffuse in the air conditioner, and also has a control mechanism for gradually evaporating which controls the release rate of the antibacterial and mold-proofing component to the inside of the air conditioner so that it becomes large at high humidity and small at low humidity.Type: ApplicationFiled: February 8, 2001Publication date: September 27, 2001Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Shigehiro Sato, Shiho Furuya, Masahiro Watanabe, Toshiyuki Imasaka, Eiji Nakatsuno
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Patent number: 6216476Abstract: In an apparatus having a refrigeration cycle, the refrigeration cycle is formed by annularly connecting a compressor, a condenser, an expansion device and an evaporator with one another, the apparatus uses propane, isobutane or ethane as a refrigerant, and uses refrigerating machine oil having less mutual solubility with the refrigerant, and a dryer is provided in the refrigeration cycle for absorbing water. In stead of the dryer, an additive which reacts with water may be included in said refrigerating machine oil. With this arrangement, the amount of the refrigerant can be reduced, and the long term reliability of the apparatus can be obtained.Type: GrantFiled: February 14, 2000Date of Patent: April 17, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hironao Numoto, Kanji Haneda, Akira Fujitaka, Shigehiro Sato, Yukio Watanabe, Yuichi Yakumaru, Yoshinori Kobayashi
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Patent number: 6196008Abstract: A method for taking custody of, transporting and installing an air conditioner having an outdoor unit which uses a flammable refrigerant and includes a refrigeration cycle comprising a compressor, an expansion device and an outdoor heat exchanger which are connected to one another through pipes, wherein the outdoor unit is shipped from a factory while the refrigeration cycle is evacuated to produce a vacuum, the outdoor unit is kept in custody and transported in a state in which the vacuum in the refrigeration cycle is maintained, and when the outdoor unit is installed, the flammable refrigerant is charged into the refrigeration cycle.Type: GrantFiled: May 21, 1999Date of Patent: March 6, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Fujitaka, Yoshinori Kobayashi, Yuichi Yakumaru, Yukio Watanabe, Hironao Numoto, Shigehiro Sato, Kanji Haneda
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Patent number: 6167719Abstract: In a compressor of a refrigeration cycle using an HC-based refrigerant and a lubricant having specific gravity greater than that of the HC-based refrigerant and having no or no or less mutual solubility with the HC-based refrigerant, an oil reservoir is formed on a bottom of the compressor, the oil reservoir is provided at its portion with a recess, a suction port of a lubricant suction pipe for supplying the lubricant to a compressor mechanism is provided in the recess. With this feature, it is possible to sufficiently supply the lubricant to the compressor even when the lubricant has no or less mutual solubility, so that even if the amount of the lubricant is reduced, the lubricant can be sufficiently sucked from an inlet port of a lubricant pumping pipe and supplied to the compressor mechanism.Type: GrantFiled: April 5, 1999Date of Patent: January 2, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuichi Yakumaru, Yukio Watanabe, Akira Fujitaka, Hironao Numoto, Shigehiro Sato, Kanji Haneda, Yoshinori Kobayashi
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Patent number: 6044660Abstract: In an apparatus having a refrigeration cycle, the refrigeration cycle is formed by annularly connecting a compressor, a condenser, an expansion device and an evaporator with one another, the apparatus uses propane, isobutane or ethane as a refrigerant, and uses refrigerating machine oil having less mutual solubility with the refrigerant, and a dryer is provided in the refrigeration cycle for absorbing water. In stead of the dryer, an additive which reacts with water may be included in said refrigerating machine oil. With this arrangement, the amount of the refrigerant can be reduced, and the long term reliability of the apparatus can be obtained.Type: GrantFiled: February 26, 1999Date of Patent: April 4, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hironao Numoto, Kanji Haneda, Akira Fujitaka, Shigehiro Sato, Yukio Watanabe, Yuichi Yakumaru, Yoshinori Kobayashi
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Patent number: 5876891Abstract: An alternating copolymer comprising a repeating unit of the formula:--Z--(X--Y).sub.n-- (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.Type: GrantFiled: May 26, 1995Date of Patent: March 2, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani