Patents by Inventor Shohei Amakawa
Shohei Amakawa 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: 10240523Abstract: The heat pump includes a terminal block box housing a terminal block for supplying an electric power to at least one electrical device. The terminal block box is supported and made rotatable in a horizontal direction by a hinge. The terminal block box is located between a portion of side plates of a package and electromagnetic valves located on the side of the portion of the side plates. As a result, maintain of electrical devices can easily be performed.Type: GrantFiled: November 18, 2015Date of Patent: March 26, 2019Assignee: Yanmar Co., Ltd.Inventors: Shohei Amakawa, Keisuke Taharabaru
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Publication number: 20170328275Abstract: The heat pump includes a terminal block box housing a terminal block for supplying an electric power to at least one electrical device. The terminal block box is supported and made rotatable in a horizontal direction by a hinge. The terminal block box is located between a portion of side plates of a package and electromagnetic valves located on the side of the portion of the side plates. As a result, maintain of electrical devices can easily be performed.Type: ApplicationFiled: November 18, 2015Publication date: November 16, 2017Inventors: Shohei AMAKAWA, Keisuke TAHARABARU
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Patent number: 9644870Abstract: An engine driven heat pump is such that when a self-sustaining switch is turned on during power failure, and a self-sustaining signal is received, it switches to a self-sustaining mode and start an engine and a generator, and when output power from an inverter is received, it supplies the output power to a power supply circuit and a battery charging circuit by means of an independent power supply relay, and it supplies the output power to the outside via an independent output unit, and during the supply of the output power, it maintains cutoff with respect to connection between a system, and the power supply circuit and the battery charging circuit by means of a system cutoff relay and maintain the output of the output power until the self-sustaining signal is interrupted, and it recovers the connection when power is restored and the output power is interrupted.Type: GrantFiled: September 18, 2014Date of Patent: May 9, 2017Assignee: YANMAR CO., LTD.Inventors: Shohei Amakawa, Masaya Horibe, Kyoko Hashimoto
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Patent number: 9360244Abstract: An engine driven heat pump includes a temperature switch that opens and closes in accordance with the peripheral temperature of an inverter and a control device that includes a signal reception unit, and a temperature open contact point that opens at a predetermined temperature or higher is provided in the temperature switch, and an abnormal-time open contact point that opens when abnormality occurs in a battery charging circuit is provided in the battery charging circuit, and a signal generation contact point that generates a state signal indicating a state of the inverter is provided in the inverter, and the temperature open contact of point the temperature switch, the abnormal-time open contact point of the battery charging circuit, and the signal generation contact point of the inverter are connected in series with respect to the signal reception unit of the control device.Type: GrantFiled: December 5, 2014Date of Patent: June 7, 2016Assignee: YANMAR CO., LTD.Inventors: Kyoko Hashimoto, Shohei Amakawa, Masaya Horibe
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Patent number: 9181911Abstract: A gas engine system has a control unit including: a first determination section for determining, as a first determination, whether the gas pressure is a low pressure less than a predetermined pressure, while the control device recognizes the gas valve is closed; a second determination section for determining, as a second determination, whether the gas pressure is a high pressure equal to or more than the predetermined pressure, while the control device recognizes that the gas valve is open, if the first determination determines the gas pressure is the low pressure; a start-up section for performing the first and second determinations before start of engine operation when receiving a start-up command; and an operation start section for opening the valve and starting the engine, if the first determination determines the gas pressure is the low pressure, and if the second determination determines the pressure is the high pressure.Type: GrantFiled: January 13, 2012Date of Patent: November 10, 2015Assignee: Yanmar Co., Ltd.Inventors: Toshinobu Fujisawa, Kenji Ogata, Shohei Amakawa, Masato Watanabe, Hiroyuki Okada
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Publication number: 20150184913Abstract: An engine driven heat pump includes a temperature switch that opens and closes in accordance with the peripheral temperature of an inverter and a control device that includes a signal reception unit, and a temperature open contact point that opens at a predetermined temperature or higher is provided in the temperature switch, and an abnormal-time open contact point that opens when abnormality occurs in a battery charging circuit is provided in the battery charging circuit, and a signal generation contact point that generates a state signal indicating a state of the inverter is provided in the inverter, and the temperature open contact of point the temperature switch, the abnormal-time open contact point of the battery charging circuit, and the signal generation contact point of the inverter are connected in series with respect to the signal reception unit of the control device.Type: ApplicationFiled: December 5, 2014Publication date: July 2, 2015Applicant: YANMAR CO., LTD.Inventors: Kyoko Hashimoto, Shohei Amakawa, Masaya Horibe
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Publication number: 20150075206Abstract: Regarding an engine driven heat pump in which an engine, a compressor, a refrigerant circuit, and a generator are stored in a main body package, an engine actuation battery to actuate the engine, a battery charging circuit to charge the engine actuation battery, and an inverter to convert output power from the generator into a predetermined voltage and a predetermined frequency are stored in a separate body package, which is a separate body with respect to the main body package, and a front surface and a back surface of the separate body package is made up of an area in such a manner as to fit in a side surface of the main body package, and the separate body package is provided on a side surface near to the generator, out of side surfaces of the main body package and supported by the main body package.Type: ApplicationFiled: September 18, 2014Publication date: March 19, 2015Inventors: Shohei Amakawa, Hideshi Okada, Keisuke Taharabaru
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Publication number: 20150075198Abstract: An engine driven heat pump is such that when a self-sustaining switch is turned on during power failure, and a self-sustaining signal is received, it switches to a self-sustaining mode and start an engine and a generator, and when output power from an inverter is received, it supplies the output power to a power supply circuit and a battery charging circuit by means of an independent power supply relay, and it supplies the output power to the outside via an independent output unit, and during the supply of the output power, it maintains cutoff with respect to connection between a system, and the power supply circuit and the battery charging circuit by means of a system cutoff relay and maintain the output of the output power until the self-sustaining signal is interrupted, and it recovers the connection when power is restored and the output power is interrupted.Type: ApplicationFiled: September 18, 2014Publication date: March 19, 2015Inventors: Shohei Amakawa, Masaya Horibe, Kyoko Hashimoto
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Publication number: 20130327295Abstract: A gas engine system has a control unit including: a first determination section for determining, as a first determination, whether the gas pressure is a low pressure less than a predetermined pressure, while the control device recognizes the gas valve is closed; a second determination section for determining, as a second determination, whether the gas pressure is a high pressure equal to or more than the predetermined pressure, while the control device recognizes that the gas valve is open, if the first determination determines the gas pressure is the low pressure; a start-up section for performing the first and second determinations before start of engine operation when receiving a start-up command; and an operation start section for opening the valve and starting the engine, if the first determination determines the gas pressure is the low pressure, and if the second determination determines the pressure is the high pressure.Type: ApplicationFiled: January 13, 2012Publication date: December 12, 2013Applicant: YANMAR CO., LTD.Inventors: Toshinobu Fujisawa, Kenji Ogata, Shohei Amakawa, Masato Watanabe, Hiroyuki Okada
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Arrangement structure for control box and electric power converter in frame-mounted engine generator
Patent number: 8450864Abstract: A frame-mounted engine generator includes a frame (2) having an engine (10), an engine-driven electric generator (11), an electric power converter (14) that converts generated electric power to a prescribed frequency, and a control box (17) having an internal control circuit board (16) for a radiator fan or other such accessory equipment, the control box and the electric power converter are arranged in stacked fashion in that order as one proceeds toward an interior direction relative to a frame open face, and is such that a hinge (21) provided at one edge of the control box causes the control box to be constituted so as to be rotatable.Type: GrantFiled: April 24, 2009Date of Patent: May 28, 2013Assignee: Yanmar Co., Ltd.Inventors: Keisuke Kawakita, Shohei Amakawa, Kazutoshi Inayoshi -
Publication number: 20110061833Abstract: The present invention has a waste heat recovery device (37) that supplies engine waste heat by way of engine coolant; a radiator (18) that dissipates engine waste heat by way of engine coolant; an exhaust gas heat exchanger (33) that supplies engine waste heat from exhaust gas to engine coolant; and a coolant pump (32) that causes engine coolant to circulate. Furthermore, the constitution is such that pressure drop equipment (34) is arranged upstream with respect to a coolant pump suction region (32b); a restrictor is arranged in a communication passage (50) between a coolant pump suction region and a region (20) vented to atmosphere; a location upstream with respect to the pressure drop equipment is made to communicate with the region vented to atmosphere; and the region vented to atmosphere is made capable of being kept in communication with atmosphere.Type: ApplicationFiled: April 24, 2009Publication date: March 17, 2011Applicant: Yanmar Co., Ltd.Inventors: Hirotoshi Kihara, Shohei Amakawa, Toshiyuki Hayashi, Shojiro Matsumura
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ARRANGEMENT STRUCTURE FOR CONTROL BOX AND ELECTRIC POWER CONVERTER IN FRAME-MOUNTED ENGINE GENERATOR
Publication number: 20110057454Abstract: In the context of a frame-mounted engine generator in which mounted within a frame (2) there are an engine (10), an engine-driven electric generator (11), an electric power converter (14) that converts generated electric power to a prescribed frequency, and a control box (17) having an internal control circuit board (16) for a radiator fan or other such accessory equipment, the present invention is such that the control box and the electric power converter are arranged in stacked fashion in that order as one proceeds toward an interior direction relative to a frame open face, and is such that a hinge (21) provided at one edge of the control box causes the control box to be constituted so as to be rotatable.Type: ApplicationFiled: April 24, 2009Publication date: March 10, 2011Applicant: YANMAR CO., LTD.Inventors: Keisuke Kawakita, Shohei Amakawa, Kazutoshi Inayoshi -
Patent number: D490374Type: GrantFiled: January 8, 2003Date of Patent: May 25, 2004Assignee: Yanmar Co., Ltd.Inventors: Shohei Amakawa, Kazutoshi Inayoshi