Patents by Inventor Norihiro OKUDA
Norihiro OKUDA 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: 20230135687Abstract: A heat pump is provided with a compressor; an oil separator provided on a discharge path of the compressor; an accumulator connected to the compressor via a suction path; and a bypass circuit configured to supply a gas refrigerant separated by the oil separator. The bypass circuit is connected to the suction path.Type: ApplicationFiled: March 4, 2021Publication date: May 4, 2023Applicant: Yanmar Power Technology Co., Ltd.Inventors: Norihiro OKUDA, Hideshi OKADA, Sachie TSUJIKAWA, Terunori AIKAWA, Tomoya YOSHIMURA
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Publication number: 20230137037Abstract: A heat pump includes an indoor heat exchanger; an outdoor heat exchanger that is connected to the indoor heat exchanger; an accumulator that is connected to the outdoor heat exchanger; an evaporative heat exchanger that is provided between the outdoor heat exchanger and the accumulator; and a bypass circuit that that is configured to enable a refrigerant that has flowed out of the indoor heat exchanger to flow into the evaporative heat exchanger.Type: ApplicationFiled: March 4, 2021Publication date: May 4, 2023Applicant: Yanmar Power Technology Co., Ltd.Inventors: Norihiro OKUDA, Terunori AIKAWA, Hideshi OKADA
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Publication number: 20230117450Abstract: A heat pump includes a first outdoor heat exchanger and a second outdoor heat exchanger which are mutually connected in parallel; a merge part at which refrigerant that has flown out from the first outdoor heat exchanger and the second outdoor heat exchanger is configured to merge; and a third outdoor heat exchanger that is connected to the merge part.Type: ApplicationFiled: March 1, 2021Publication date: April 20, 2023Applicant: Yanmar Power Technology Co., Ltd.Inventors: Norihiro OKUDA, Sachie TSUJIKAWA, Terunori AIKAWA, Shingo OKADA
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Patent number: 11566797Abstract: A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.Type: GrantFiled: February 25, 2020Date of Patent: January 31, 2023Assignee: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Norihiro Okuda, Terunori Aikawa, Hirotoshi Kihara
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Patent number: 11441794Abstract: A gas-side stop valve on the gas refrigerant side and a liquid-side stop valve on the liquid refrigerant side are provided in a package of an outdoor unit. A gas-side filter on the gas refrigerant side is mounted on the indoor unit side relative to the gas-side stop valve and inside the package of the outdoor unit. A liquid-side filter 9 on the liquid refrigerant side is mounted on the indoor unit side relative to the liquid-side stop valve and inside the package of the outdoor unit. As a result, it is not necessary to ensure a place for mounting the gas-side filter and the liquid-side filter at the time of installation on site and the workability can be improved.Type: GrantFiled: March 5, 2020Date of Patent: September 13, 2022Assignee: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Norihiro Okuda, Hirohiko Nobuhara
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Patent number: 11215370Abstract: A heat pump system includes a first heat pump and a second heat pump. The first heat pump includes a first outdoor unit. The first outdoor unit includes a compressor, an outdoor-unit connecting pipe, and a refrigerant filling port. The outdoor-unit connecting pipe connects an intake path of the compressor and a second outdoor unit of the second heat pump for supplying a refrigerant to the second outdoor unit of the second heat pump. The refrigerant filling port is provided in a portion of the outdoor-unit connecting pipe.Type: GrantFiled: October 29, 2019Date of Patent: January 4, 2022Assignee: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Hideshi Okada, Norihiro Okuda, Tomoya Yoshimura
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Patent number: 10816251Abstract: An exemplary heat pump includes: a compressor configured to compress a refrigerant; a first heat exchanger configured to condense the compressed refrigerant; a flow rate adjustment valve configured to adjust a flow rate of the condensed refrigerant; an expansion valve having an adjustable opening and configured to decompress the refrigerant having passed the flow rate adjustment valve; a second heat exchanger configured to cool a temperature control target by using the refrigerant decompressed by the expansion valve; and a control device configured to control the opening of the expansion valve based on a difference between the temperature of the refrigerant flowing into the second heat exchanger and the temperature of the refrigerant flowing out from the second heat exchanger, and to control the opening of the flow rate adjustment valve based on the flow rate of the refrigerant to be supplied to the second heat exchanger.Type: GrantFiled: March 11, 2016Date of Patent: October 27, 2020Assignee: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Norihiro Okuda, Hirotoshi Kihara, Keisuke Ota, Terunori Aikawa
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Publication number: 20200200405Abstract: A gas-side stop valve on the gas refrigerant side and a liquid-side stop valve on the liquid refrigerant side are provided in a package of an outdoor unit. A gas-side filter on the gas refrigerant side is mounted on the indoor unit side relative to the gas-side stop valve and inside the package of the outdoor unit. A liquid-side filter 9 on the liquid refrigerant side is mounted on the indoor unit side relative to the liquid-side stop valve and inside the package of the outdoor unit. As a result, it is not necessary to ensure a place for mounting the gas-side filter and the liquid-side filter at the time of installation on site and the workability can be improved.Type: ApplicationFiled: March 5, 2020Publication date: June 25, 2020Inventors: Norihiro OKUDA, Hirohiko NOBUHARA
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Publication number: 20200191416Abstract: A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.Type: ApplicationFiled: February 25, 2020Publication date: June 18, 2020Inventors: Norihiro OKUDA, Terunori AIKAWA, Hirotoshi KIHARA
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Patent number: 10605466Abstract: A gas-side stop valve on the gas refrigerant side and a liquid-side stop valve on the liquid refrigerant side are provided in a package of an outdoor unit. A gas-side filter on the gas refrigerant side is mounted on the indoor unit side relative to the gas-side stop valve and inside the package of the outdoor unit. A liquid-side filter 9 on the liquid refrigerant side is mounted on the indoor unit side relative to the liquid-side stop valve and inside the package of the outdoor unit. As a result, it is not necessary to ensure a place for mounting the gas-side filter and the liquid-side filter at the time of installation on site and the workability can be improved.Type: GrantFiled: November 18, 2015Date of Patent: March 31, 2020Assignee: YANMAR CO., LTD.Inventors: Norihiro Okuda, Hirohiko Nobuhara
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Patent number: 10591171Abstract: A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.Type: GrantFiled: November 18, 2015Date of Patent: March 17, 2020Assignee: YANMAR CO., LTD.Inventors: Norihiro Okuda, Terunori Aikawa, Hirotoshi Kihara
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Publication number: 20200063987Abstract: A heat pump system includes a first heat pump and a second heat pump. The first heat pump includes a first outdoor unit. The first outdoor unit includes a compressor, an outdoor-unit connecting pipe, and a refrigerant filling port. The outdoor-unit connecting pipe connects an intake path of the compressor and a second outdoor unit of the second heat pump for supplying a refrigerant to the second outdoor unit of the second heat pump. The refrigerant filling port is provided in a portion of the outdoor-unit connecting pipe.Type: ApplicationFiled: October 29, 2019Publication date: February 27, 2020Inventors: Hideshi OKADA, Norihiro OKUDA, Tomoya YOSHIMURA
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Patent number: 10495325Abstract: An outdoor unit of the heat pump includes a compressor, an oil separator provided in a discharge path of the compressor, an outdoor-unit connecting pipe connecting an intake path of the compressor and an outdoor unit of an another heat pump for supplying a refrigerant to the outdoor unit of the another heat pump, an oil supply pipe extending from a predetermined position of the oil separator and connecting to the outdoor-unit connecting pipe, an on-off valve provided on the oil supply pipe, an expansion valve provided in a portion of the outdoor-unit connecting pipe between a connecting part connected to the intake path and a connecting part connected to the oil supply pipe, and a refrigerant filling port provided in a portion of the outdoor-unit connecting pipe between the connecting part and the expansion valve.Type: GrantFiled: November 18, 2015Date of Patent: December 3, 2019Assignee: YANMAR CO., LTD.Inventors: Hideshi Okada, Norihiro Okuda, Tomoya Yoshimura
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Publication number: 20180080697Abstract: An exemplary heat pump includes: a compressor configured to compress a refrigerant; a first heat exchanger configured to condense the compressed refrigerant; a flow rate adjustment valve configured to adjust a flow rate of the condensed refrigerant; an expansion valve having an adjustable opening and configured to decompress the refrigerant having passed the flow rate adjustment valve; a second heat exchanger configured to cool a temperature control target by using the refrigerant decompressed by the expansion valve; and a control device configured to control the opening of the expansion valve based on a difference between the temperature of the refrigerant flowing into the second heat exchanger and the temperature of the refrigerant flowing out from the second heat exchanger, and to control the opening of the flow rate adjustment valve based on the flow rate of the refrigerant to be supplied to the second heat exchanger.Type: ApplicationFiled: March 11, 2016Publication date: March 22, 2018Applicant: Yanmar Co., Ltd.Inventors: Norihiro OKUDA, Hirotoshi KIHARA, Keisuke OTA, Terunori AIKAWA
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Publication number: 20170328583Abstract: A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.Type: ApplicationFiled: November 18, 2015Publication date: November 16, 2017Inventors: Norihiro OKUDA, Terunori AIKAWA, Hirotoshi KIHARA
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Publication number: 20170328582Abstract: A gas-side stop valve on the gas refrigerant side and a liquid-side stop valve on the liquid refrigerant side are provided in a package of an outdoor unit. A gas-side filter on the gas refrigerant side is mounted on the indoor unit side relative to the gas-side stop valve and inside the package of the outdoor unit. A liquid-side filter 9 on the liquid refrigerant side is mounted on the indoor unit side relative to the liquid-side stop valve and inside the package of the outdoor unit. As a result, it is not necessary to ensure a place for mounting the gas-side filter and the liquid-side filter at the time of installation on site and the workability can be improved.Type: ApplicationFiled: November 18, 2015Publication date: November 16, 2017Inventors: Norihiro OKUDA, Hirohiko NOBUHARA
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Publication number: 20170328581Abstract: An outdoor unit of the heat pump includes a compressor, an oil separator provided in a discharge path of the compressor, an outdoor-unit connecting pipe connecting an intake path of the compressor and an outdoor unit of an another heat pump for supplying a refrigerant to the outdoor unit of the another heat pump, an oil supply pipe extending from a predetermined position of the oil separator and connecting to the outdoor-unit connecting pipe, an on-off valve provided on the oil supply pipe, an expansion valve provided in a portion of the outdoor-unit connecting pipe between a connecting part connected to the intake path and a connecting part connected to the oil supply pipe, and a refrigerant filling port provided in a portion of the outdoor-unit connecting pipe between the connecting part and the expansion valve.Type: ApplicationFiled: November 18, 2015Publication date: November 16, 2017Inventors: Hideshi OKADA, Norihiro OKUDA, Tomoya YOSHIMURA