Patents by Inventor Sumio Kagimura
Sumio Kagimura 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: 10619878Abstract: An inverter driver of an air conditioner drives an inverter of an actuator that actuates the air conditioner. The inverter driver includes a drive circuit outputting a drive signal to the inverter, a microcomputer controlling the drive circuit, a first mechanical relay connected to the drive circuit, and an inverter control power supply continually supplying power to the microcomputer. The first mechanical relay is capable of cutting off an inverter drive power supply of the drive circuit or cutting off the drive signal of the drive circuit. The first mechanical relay cuts off the inverter drive power supply of the drive circuit or the drive signal of the drive circuit when an abnormality in the air conditioner has been sensed and stopping the driving of the actuator has been requested.Type: GrantFiled: March 28, 2016Date of Patent: April 14, 2020Assignee: Daikin Industries, Ltd.Inventors: Hirotaka Doi, Hiroshi Doumae, Takuji Koyama, Nobuyasu Hiraoka, Michiya Takezoe, Sumio Kagimura, Keito Kotera
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Patent number: 10495327Abstract: An inverter apparatus variably controls an operation frequency of an electric motor provided in a refrigerating device, and includes: a printed wiring board; a power device attached to one surface of the printed wiring board, the power device including a converter circuit and an inverter circuit; a reactor arranged on a side of the one surface of the printed wiring board, at least a part of the reactor being arranged within a plane projection area of the printed wiring board; and a cooler for cooling the power device and the reactor, the cooler being arranged such that the power device and the reactor are interposed between the cooler and the printed wiring board.Type: GrantFiled: June 6, 2016Date of Patent: December 3, 2019Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Hirotaka Doi, Hiroshi Doumae, Nobuyasu Hiraoka, Sumio Kagimura, Keito Kotera
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Patent number: 10320284Abstract: An inverter device uses an inverter to convert DC voltage supplied from a rectifying component to AC voltage and applies the AC voltage to an inductive load. The inverter device includes a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter, a first terminal passing current to the shunt resistor, a second terminal to which the current from the shunt resistor flows, and a printed board having a conductive pattern with first and second conductive pattern components joining the shunt resistor and the first and second terminals, respectively. The first conductive pattern component includes a first central region connecting right and left side ends of the shunt resistor to right and left side ends of the first terminal, and first right and left side protruding regions. A ratio of areas of the first left and right side protruding regions is 0.6 to 1.6.Type: GrantFiled: June 8, 2016Date of Patent: June 11, 2019Assignee: Daikin Industries, Ltd.Inventors: Hirotaka Doi, Hiroshi Doumae, Takuji Koyama, Michiya Takezoe, Keito Kotera, Masahiro Yamamoto, Yoshitsugu Koyama, Sumio Kagimura
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Publication number: 20180191240Abstract: An inverter device uses an inverter to convert DC voltage supplied from a rectifying component to AC voltage and applies the AC voltage to an inductive load. The inverter device includes a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter, a first terminal passing current to the shunt resistor, a second terminal to which the current from the shunt resistor flows, and a printed board having a conductive pattern with first and second conductive pattern components joining the shunt resistor and the first and second terminals, respectively. The first conductive pattern component includes a first central region connecting right and left side ends of the shunt resistor to right and left side ends of the first terminal, and first right and left side protruding regions. A ratio of areas of the first left and right side protruding regions is 0.6 to 1.6.Type: ApplicationFiled: June 8, 2016Publication date: July 5, 2018Inventors: Hirotaka DOI, Hiroshi DOUMAE, Takuji KOYAMA, Michiya TAKEZOE, Keito KOTERA, Masahiro YAMAMOTO, Yoshitsugu KOYAMA, Sumio KAGIMURA
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Publication number: 20180187905Abstract: An inverter apparatus variably controls an operation frequency of an electric motor provided in a refrigerating device, and includes: a printed wiring board; a power device attached to one surface of the printed wiring board, the power device including a converter circuit and an inverter circuit; a reactor arranged on a side of the one surface of the printed wiring board, at least a part of the reactor being arranged within a plane projection area of the printed wiring board; and a cooler for cooling the power device and the reactor, the cooler being arranged such that the power device and the reactor are interposed between the cooler and the printed wiring board.Type: ApplicationFiled: June 6, 2016Publication date: July 5, 2018Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hirotaka Doi, Hiroshi Doumae, Nobuyasu Hiraoka, Sumio Kagimura, Keito Kotera
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Publication number: 20180073765Abstract: An inverter driver of an air conditioner drives an inverter of an actuator that actuates the air conditioner. The inverter driver includes a drive circuit outputting a drive signal to the inverter, a microcomputer controlling the drive circuit, a first mechanical relay connected to the drive circuit, and an inverter control power supply continually supplying power to the microcomputer. The first mechanical relay is capable of cutting off an inverter drive power supply of the drive circuit or cutting off the drive signal of the drive circuit. The first mechanical relay cuts off the inverter drive power supply of the drive circuit or the drive signal of the drive circuit when an abnormality in the air conditioner has been sensed and stopping the driving of the actuator has been requested.Type: ApplicationFiled: March 28, 2016Publication date: March 15, 2018Inventors: Hirotaka DOI, Hiroshi DOUMAE, Takuji KOYAMA, Nobuyasu HIRAOKA, Michiya TAKEZOE, Sumio KAGIMURA, Keito KOTERA
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Patent number: 9564797Abstract: A converter receives input of an AC voltage, converts the AC voltage into a DC voltage, and applies the DC voltage between a first power line on a positive electrode side and a second power line on a negative electrode side. A snubber circuit has a capacitor provided between the first and the second power lines, and a diode connected in series with the capacitor between the first and the second power lines, and including an anode on a side close to the first power line on the positive electrode side in a series path with the capacitor. An inverter converts the DC voltage into an AC voltage, and applies the AC voltage to an inductive load. An inverter-side current detection unit detects a current that flows through the first power line on the positive electrode side or the second power line on the negative electrode side between the inverter and the snubber circuit.Type: GrantFiled: January 23, 2013Date of Patent: February 7, 2017Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Sumio Kagimura, Toshiaki Satou, Shinichi Ishizeki
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Patent number: 9252679Abstract: A reverse recovery current prevention device includes a full wave rectifier having a plurality of diodes, first and second diodes, a switch part and a switch control unit. The full wave rectifier rectifies a power source voltage from an alternating current power source inputted into first and second input terminals. The first and second diodes have anode terminals connected to the first and second input terminals, respectively. The switch part opens or shorts an electrical circuit between a negative-side output terminal of the full wave rectifier and each cathode terminal of the first and second diodes. The switch control unit prohibits the switch part from shorting the electrical circuit between the negative-side output terminal and each of the cathode terminals when a voltage between the negative-side output terminal and each of the cathode terminals is at or above a threshold.Type: GrantFiled: December 2, 2010Date of Patent: February 2, 2016Assignee: Daikin Industries, Ltd.Inventors: Motonobu Ikeda, Satoshi Yagi, Sumio Kagimura
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Patent number: 9035193Abstract: A connecting member such as a terminal base is used in connection with a printed circuit board unit in which circuit elements such as a power module are mounted on a printed circuit board. The connecting member connects the circuit element of an electrical circuit including the printed circuit board, to an electrical wire. The connecting member includes a terminal connecting section to be directly connected to terminal pins of the circuit element; a wire connecting section to be connected to the electrical wire; and attachment sections for attaching the connecting member to the printed circuit board.Type: GrantFiled: April 23, 2009Date of Patent: May 19, 2015Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Sumio Kagimura, Hiroshi Doumae, Hirotaka Doi, Shuuji Genda
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Patent number: 9001536Abstract: A voltage smoothing circuit is configured to smooth a voltage outputted from a power supply portion. The voltage smoothing circuit includes first and second smoothing capacitors, a first balancing resistor, and a second conduction regulating portion. The first smoothing capacitor and the second smoothing capacitor are connected in series to each other and are connected in parallel to the power supply portion. The first balancing resistor is connected in parallel to the first smoothing capacitor. The second conduction regulating portion is connected on a current path in parallel with the second smoothing capacitor and conducts current in one direction on the current path in a case where a voltage equal to or greater than a second predetermined voltage has been applied.Type: GrantFiled: August 5, 2010Date of Patent: April 7, 2015Assignee: Daikin Industries, Ltd.Inventors: Sumio Kagimura, Masafumi Hashimoto, Hiroshi Dohmae, Hirotaka Doi, Toshiaki Sato, Shinichi Ishizeki
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Patent number: 8995145Abstract: A circuit board unit includes a printed circuit board and a terminal block mounted on the printed circuit board and connecting a power module and an electrical wire together. The terminal block includes a terminal connection part to be directly connected to the power module, and a wire connection part to be connected to the electrical wire. In the printed circuit board, a hole having an orthographic projection area larger than that of the terminal connection part as viewed in plane is formed. The terminal connection part is positioned below or above the hole of the printed circuit board.Type: GrantFiled: October 28, 2010Date of Patent: March 31, 2015Assignee: Daikin Industries, Ltd.Inventors: Sumio Kagimura, Hiroshi Doumae
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Publication number: 20150049526Abstract: A converter receives input of an AC voltage, converts the AC voltage into a DC voltage, and applies the DC voltage between a first power line on a positive electrode side and a second power line on a negative electrode side. A snubber circuit has a capacitor provided between the first and the second power lines, and a diode connected in series with the capacitor between the first and the second power lines, and including an anode on a side close to the first power line on the positive electrode side in a series path with the capacitor. An inverter converts the DC voltage into an AC voltage, and applies the AC voltage to an inductive load. An inverter-side current detection unit detects a current that flows through the first power line on the positive electrode side or the second power line on the negative electrode side between the inverter and the snubber circuit.Type: ApplicationFiled: January 23, 2013Publication date: February 19, 2015Inventors: Sumio Kagimura, Toshiaki Satou, Shinichi Ishizeki
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Patent number: 8801390Abstract: A fan control system includes a first fan, a second fan that is adjacent to the first fan, a first motor that is configured to rotate the first fan, a second motor that is configured to rotate the second fan, and a control unit. The control unit is configured to control the rotational speeds of the first motor and the second motor, and to decrease the rotational speeds of both the first motor and the second motor when the rotational speed of the first motor must be decreased.Type: GrantFiled: May 20, 2008Date of Patent: August 12, 2014Assignee: Daikin Industries, Ltd.Inventors: Toshiaki Sato, Hiroshi Doumae, Sumio Kagimura
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Patent number: 8773048Abstract: A fan control system includes a first fan, a second fan adjacent to the first fan, a first motor that rotates the first fan, a second motor that rotates the second fan, and a control unit. The control unit controls the rotational speeds of the first motor and the second motor. The control unit decreases the rotational speed of the first motor and increases/decreases the rotational speed of the second motor when the rotational speed of the first motor must be decreased. The control unit can decrease the rotational speed of the second motor when the rotational speed of the first motor whose rotational speed has been decreased is lower than a prescribed rotational speed, and increase the rotational speed of the second motor when the rotational speed of the first motor whose rotational speed has been decreased is higher than the prescribed rotational speed.Type: GrantFiled: December 15, 2011Date of Patent: July 8, 2014Assignee: Daikin Industries, Ltd.Inventors: Toshiaki Sato, Hiroshi Doumae, Sumio Kagimura
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Patent number: 8348625Abstract: A fan control system includes first and second adjacent fans, first and second motors configured to rotate the first and second fans, and a control unit configured to control rotational speeds of the first and second motors in order to control rotational speeds of the first and second fans. The first and second motors are energized such that the rotational speeds of the first and second fans reach target rotational speeds prior to increasing the rotational speeds of the first and second fans to required rotational speeds. The target rotational speeds are lower than the required rotational speeds. The first and second motors are energized such that the rotational speeds of the first and second fans reach the required rotational speeds after the rotational speeds of the first and second fans reach the target rotational speeds.Type: GrantFiled: April 22, 2008Date of Patent: January 8, 2013Assignee: Daikin Industries, Ltd.Inventors: Toshiaki Sato, Hiroshi Doumae, Sumio Kagimura
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Publication number: 20120286708Abstract: A reverse recovery current prevention device includes a full wave rectifier having a plurality of diodes, first and second diodes, a switch part and a switch control unit. The full wave rectifier rectifies a power source voltage from an alternating current power source inputted into first and second input terminals. The first and second diodes have anode terminals connected to the first and second input terminals, respectively. The switch part opens or shorts an electrical circuit between a negative-side output terminal of the full wave rectifier and each cathode terminal of the first and second diodes. The switch control unit prohibits the switch part from shorting the electrical circuit between the negative-side output terminal and each of the cathode terminals when a voltage between the negative-side output terminal and each of the cathode terminals is at or above a threshold.Type: ApplicationFiled: December 2, 2010Publication date: November 15, 2012Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Motonobu Ikeda, Satoshi Yagi, Sumio Kagimura
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Patent number: 8310210Abstract: A zero-phase current is outputted by detecting a ground-fault current with a zero-phase-sequence current transformer. A circuit having an open collector output operates when the voltage of the zero-phase current exceeds a positive side threshold value or it falls below a negative side threshold value to discharge a capacitor. When the inter-plate voltage of the capacitor falls below a threshold value voltage, a controlling means detects electric leakage to transmit that to a control unit of an air conditioner.Type: GrantFiled: September 1, 2008Date of Patent: November 13, 2012Assignee: Daikin Industries, Ltd.Inventors: Hiroshi Doumae, Sumio Kagimura, Tooru Masuda
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Publication number: 20120214321Abstract: A circuit board unit includes a printed circuit board and a terminal block mounted on the printed circuit board and connecting a power module and an electrical wire together. The terminal block includes a terminal connection part to be directly connected to the power module, and a wire connection part to be connected to the electrical wire. In the printed circuit board, a hole having an orthographic projection area larger than that of the terminal connection part as viewed in plane is formed. The terminal connection part is positioned below or above the hole of the printed circuit board.Type: ApplicationFiled: October 28, 2010Publication date: August 23, 2012Inventors: Sumio Kagimura, Hiroshi Doumae
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Publication number: 20120126776Abstract: A voltage smoothing circuit is configured to smooth a voltage outputted from a power supply portion. The voltage smoothing circuit includes first and second smoothing capacitors, a first balancing resistor, and a second conduction regulating portion. The first smoothing capacitor and the second smoothing capacitor are connected in series to each other and are connected in parallel to the power supply portion. The first balancing resistor is connected in parallel to the first smoothing capacitor. The second conduction regulating portion is connected on a current path in parallel with the second smoothing capacitor and conducts current in one direction on the current path in a case where a voltage equal to or greater than a second predetermined voltage has been applied.Type: ApplicationFiled: August 5, 2010Publication date: May 24, 2012Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Sumio Kagimura, Masafumi Hashimoto, Hiroshi Dohmae, Hirotaka Doi, Toshiaki Sato, Shinichi Ishizeki
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Publication number: 20120103590Abstract: A fan control system includes a first fan, a second fan adjacent to the first fan, a first motor that rotates the first fan, a second motor that rotates the second fan, and a control unit. The control unit controls the rotational speeds of the first motor and the second motor. The control unit decreases the rotational speed of the first motor and increases/decreases the rotational speed of the second motor when the rotational speed of the first motor must be decreased, The control unit can decrease the rotational speed of the second motor when the rotational speed of the first motor whose rotational speed has been decreased is lower than a prescribed rotational speed, and increase the rotational speed of the second motor when the rotational speed of the first motor whose rotational speed has been decreased is higher than the prescribed rotational speed.Type: ApplicationFiled: December 15, 2011Publication date: May 3, 2012Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Toshiaki SATO, Hiroshi DOUMAE, Sumio KAGIMURA