Patents by Inventor Terunori AIKAWA
Terunori AIKAWA 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: 12228315Abstract: 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: GrantFiled: March 4, 2021Date of Patent: February 18, 2025Assignee: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Norihiro Okuda, Hideshi Okada, Sachie Tsujikawa, Terunori Aikawa, Tomoya Yoshimura
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Publication number: 20230339292Abstract: A heat pump device is provided with: a compressor; an engine; a power generator; and a motor. The compressor pressurizes a refrigerant. The power generator is driven by the engine. The motor operates with power generated by the power generator. In addition, the motor drives the compressor.Type: ApplicationFiled: June 30, 2021Publication date: October 26, 2023Applicant: Yanmar Holdings Co., Ltd.Inventors: Shota Imoto, Satoshi Matsushita, Yuichiro Tanaka, Kengo Kimura, Soichiro Kamoda, Terunori Aikawa, Takuma Iwami
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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: 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: 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: 10641530Abstract: An exemplary heat pump (10) includes: a compressor (16A, 16B) that discharges refrigerant; an oil separator (30) that separates oil from the refrigerant discharged from the compressor; an oil return channel (80) that returns the oil separated by the oil separator to the compressor; a pressure sensor (86A, 86B) that detects a pressure in the oil return channel; a first pressure loss member (84A, 84B) and a second pressure loss member (88A, 88B) disposed in portions of the oil return channel at an oil separator side and a compressor side relative to the pressure sensor; and a control device that increases an output of the compressor in a case where a pressure detected by the pressure sensor exceeds a suction pressure of the compressor and less than a discharge pressure of the compressor.Type: GrantFiled: March 11, 2016Date of Patent: May 5, 2020Assignee: YANMAR CO., LTD.Inventors: Hirotoshi Kihara, Keisuke Ota, Terunori Aikawa, Hirohiko Nobuhara, Hirotaka Nakamura
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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: 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: 20180051704Abstract: An exemplary heat pump (10) includes: a compressor (16A, 16B) that discharges refrigerant; an oil separator (30) that separates oil from the refrigerant discharged from the compressor; an oil return channel (80) that returns the oil separated by the oil separator to the compressor; a pressure sensor (86A, 86B) that detects a pressure in the oil return channel; a first pressure loss member (84A, 84B) and a second pressure loss member (88A, 88B) disposed in portions of the oil return channel at an oil separator side and a compressor side relative to the pressure sensor; and a control device that increases an output of the compressor in a case where a pressure detected by the pressure sensor exceeds a suction pressure of the compressor and less than a discharge pressure of the compressor.Type: ApplicationFiled: March 11, 2016Publication date: February 22, 2018Applicant: Yanmar Co., Ltd.Inventors: Hirotoshi KIHARA, Keisuke OTA, Terunori AIKAWA, Hirohiko NOBUHARA, Hirotaka NAKAMURA
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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