Patents by Inventor Tomoyasu Osaki
Tomoyasu Osaki 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: 11331981Abstract: This on-board air conditioner control device comprises: a PTC heater which is contained in a high-voltage circuit and generates heat by means of power supplied from a high-voltage battery; a micro-controller which is contained in a low-voltage circuit and controls the power supplied to the PTC heater from the high-voltage battery; a current detection sensor which is contained in the high-voltage circuit and outputs a voltage signal indicating a value for the current flowing through the PTC heater; a V/f conversion unit which is contained in the high-voltage circuit and converts the voltage signal outputted by the current detection sensor to a frequency signal; and a digital isolator which transmits the frequency signal to the micro-controller while preserving electrical insulation between the V/f conversion unit and the micro-controller.Type: GrantFiled: April 17, 2019Date of Patent: May 17, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Hidetaka Sato, Tomoyasu Osaki, Keiji Nagasaka, Ryota Kojima
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Patent number: 11285784Abstract: This on-board air conditioner control device comprises: a PTC heater which is contained in a high-voltage circuit and generates heat by means of power supplied from a high-voltage battery; a micro-controller which is contained in a low-voltage circuit and controls the power supplied to the PTC heater from the high-voltage battery; a current detection sensor which is contained in the high-voltage circuit and outputs a voltage signal indicating a value for the current flowing through the PTC heater; a V/f conversion unit which is contained in the high-voltage circuit and converts the voltage signal outputted by the current detection sensor to a frequency signal; and a digital isolator which transmits the frequency signal to the micro-controller while preserving electrical insulation between the V/f conversion unit and the micro-controller.Type: GrantFiled: April 17, 2019Date of Patent: March 29, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Hidetaka Sato, Tomoyasu Osaki, Keiji Nagasaka, Ryota Kojima
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Publication number: 20210237538Abstract: This vehicle-mounted air conditioner control device (1) comprises: a PTC heater (H) that is included in a high-voltage system circuit (HV) and generates heat by the power supplied from a high-voltage battery (B2); and a microcomputer (10) that is included in the high-voltage system circuit (HV) and controls the power supply from the high-voltage battery (B2) to the PTC heater (H). This vehicle-mounted air conditioner control device (1) further comprises: a water temperature sensor (151, 152) that is included in a low-voltage system circuit (LV) and outputs a voltage signal corresponding to the temperature of hot water; and a V/f conversion unit (161, 162) that is included in the low-voltage system circuit (LV) and converts the voltage signal output from the water temperature sensor (151, 152) into a frequency signal.Type: ApplicationFiled: April 19, 2019Publication date: August 5, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Hidetaka SATO, Tomoyasu OSAKI, Keiji NAGASAKA, Ryota KOJIMA
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Publication number: 20210206234Abstract: This on-board air conditioner control device (1) comprises: a PTC heater (H) which is contained in a high-voltage circuit (HV) and generates heat by means of power supplied from a high-voltage battery (B2); a micro-controller (10) which is contained in a low-voltage circuit (LV) and controls the power supplied to the PTC heater (H) from the high-voltage battery (B2); a current detection sensor (14) which is contained in the high-voltage circuit (HV) and outputs a voltage signal indicating a value for the current flowing through the PTC heater (H); a V/f conversion unit (162) which is contained in the high-voltage circuit (HV) and converts the voltage signal outputted by the current detection sensor (14) to a frequency signal; and a digital isolator (172) which transmits the frequency signal to the micro-controller (10) while preserving electrical insulation between the V/f conversion unit (162) and the micro-controller (10).Type: ApplicationFiled: April 17, 2019Publication date: July 8, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Hidetaka SATO, Tomoyasu OSAKI, Keiji NAGASAKA, Ryota KOJIMA
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Publication number: 20200128625Abstract: A heater is provided with a heating element that generates heat by electrical connection, anode and cathode plates each formed in a plate shape and are installed such that the heating element is sandwiched between the anode and cathode plates from both sides thereof, and a discharging unit installed in a heating element non-provided region and that discharges a surge current. The heating element non-provided region is included in a facing portion where the anode plate faces the cathode plate and differs from a heating element provided region where the heating element is provided.Type: ApplicationFiled: March 22, 2017Publication date: April 23, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Keiji NAGASAKA, Hideo NAKAMURA, Yutaka KUBOTA, Masanori MARUYAMA, Hidetaka SATO, Tomoyasu OSAKI
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Patent number: 10286753Abstract: The on-state malfunction detection device detects an on-state malfunction, for instance, in an IGBT that is provided to correspond to a PTC element whose electrical resistance value varies according to temperature and that controls the electrification of the PTC element. In a state in which a turn-off instruction has been outputted from a control device to the IGBT, the on-state malfunction detection device determines through calculation an electric potential difference following voltage division of the voltage between the both ends of the PTC element, and detects an on-state malfunction of the IGBT when this electric potential difference is equal to or greater than a predetermined threshold value. This allows for the detection of an on-state malfunction in a switching element that performs an electrical conduction control for an element whose electrical resistance value varies according to temperature.Type: GrantFiled: February 2, 2015Date of Patent: May 14, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Keiji Nagasaka, Hidetaka Sato, Tomoyasu Osaki
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Publication number: 20170021696Abstract: The on-state malfunction detection device detects an on-state malfunction, for instance, in an IGBT that is provided to correspond to a PTC element whose electrical resistance value varies according to temperature and that controls the electrification of the PTC element. In a state in which a turn-off instruction has been outputted from a control device to the IGBT, the on-state malfunction detection device determines through calculation an electric potential difference following voltage division of the voltage between the both ends of the PTC element, and detects an on-state malfunction of the IGBT when this electric potential difference is equal to or greater than a predetermined threshold value. This allows for the detection of an on-state malfunction in a switching element that performs an electrical conduction control for an element whose electrical resistance value varies according to temperature.Type: ApplicationFiled: February 2, 2015Publication date: January 26, 2017Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.Inventors: Keiji NAGASAKA, Hidetaka SATO, Tomoyasu OSAKI
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Patent number: 8784078Abstract: An integrated-inverter electric compressor in which an inverter accommodating section (9) is provided on the periphery of a housing, an inverter that supplies driving power to an electric motor is installed in the inverter accommodating section (9), and its opening (10) is tightly sealed with a cover (13) is configured such that a groove (16) in which a liquid sealant (20) is to be filled is provided in a flange (11) around the opening (10); the liquid sealant (20) filled in the groove (16) is cured to tightly seal a joint surface between the flange (11) and the cover (13); and when the width of a joint surface (17) formed at the inner periphery of the groove (16) in the flange (11) is L1 and the width of a joint surface (18) formed at the outer periphery of the groove (16) is L2, L1<L2 holds.Type: GrantFiled: June 10, 2009Date of Patent: July 22, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Manabu Suzuki, Ichiro Yogo, Tomoyasu Osaki
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Publication number: 20110091337Abstract: It is an object to provide an integrated-inverter electric compressor in which variations in sealing performance hardly occur, thus reliably enhancing the waterproofing performance of an inverter accommodating section.Type: ApplicationFiled: June 10, 2009Publication date: April 21, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Manabu Suzuki, Ichiro Yogo, Tomoyasu Osaki