Patents by Inventor Kensaku HATANAKA
Kensaku HATANAKA 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: 11512880Abstract: A refrigeration cycle apparatus includes a first refrigerant circuit including a first compressor, a first heat exchanger, a first refrigerant flow path of a second heat exchanger, a first expansion device, a third heat exchanger, and a second refrigerant flow path of a fourth heat exchanger, and a second refrigerant circuit including a second compressor, a fifth heat exchanger, a second expansion device, a third refrigerant flow path of the second heat exchanger, and a fourth refrigerant flow path of the fourth heat exchanger, a first refrigerant flows through, in order, the first compressor, the first heat exchanger, the first refrigerant flow path, the first expansion device, the third heat exchanger, and the second refrigerant flow path, the second refrigerant flows through, in order, the second compressor, the fifth heat exchanger, the second expansion device, the third refrigerant flow path, and the fourth refrigerant flow path.Type: GrantFiled: November 22, 2016Date of Patent: November 29, 2022Assignee: Mitsubishi Electric CorporationInventors: Hisato Morita, Kosuke Tanaka, Kensaku Hatanaka
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Patent number: 11293676Abstract: A refrigeration cycle apparatus in which a refrigerant having potential for disproportionation reaction circulates a first refrigerant flow path connected between a discharge side of the compressor and the condenser; a second refrigerant flow path connected between the condenser and the expansion valve; a third refrigerant flow path connected between the expansion valve and a suction side of the compressor; a jetting unit; a pressure measuring unit; and a temperature measuring unit. The jetting unit is configured to jet the refrigerant drawn from the second refrigerant flow path or the third refrigerant flow path to at least one of the compressor, the first refrigerant flow path and the second refrigerant flow path when at least one of a measured value of the pressure measuring unit and a measured value of the temperature measuring unit exceeds an allowed value.Type: GrantFiled: January 20, 2016Date of Patent: April 5, 2022Assignee: Mitsubishi Electric CorporationInventors: Takumi Nishiyama, Kosuke Tanaka, Kensaku Hatanaka
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Patent number: 11193705Abstract: A first valve is connected between a compressor and a first heat exchanger. A second valve is connected between the first heat exchanger and a expansion valve. When a start condition of the heating operation is satisfied and when a specific condition is satisfied, a controller starts supplying refrigerant from the compressor to the first valve, and then, opens the first and second valves. The specific condition is a condition indicating that a first heat exchange capability of the first heat exchanger is higher than a second heat exchange capability of a second heat exchanger. When the start condition of the heating operation is satisfied and when the specific condition is not satisfied, the controller opens the first and second valves, and then starts supplying the refrigerant from the compressor to the first valve.Type: GrantFiled: November 2, 2017Date of Patent: December 7, 2021Assignee: Mitsubishi Electric CorporationInventor: Kensaku Hatanaka
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Patent number: 11156391Abstract: A refrigeration cycle apparatus includes a heat source unit configured to supply refrigerant, a first distribution unit and a second distribution unit respectively connected to the heat source unit, and a distribution pipe located between the heat source unit and the first distribution unit and the second distribution unit for distributing the refrigerant flowing from the heat source unit into the first distribution unit and the second distribution unit. Further, the first distribution unit and the second distribution unit individually include a heat exchanger configured to serve as a condenser. Further, if the refrigerant flowing through the distribution pipe is unevenly distributed into the first distribution unit and the second distribution unit, a degree of subcooling at an outlet of the heat exchanger of one of the first distribution unit and the second distribution unit of which the distributed refrigerant is of high quality is increased.Type: GrantFiled: April 20, 2015Date of Patent: October 26, 2021Assignee: Mitsubishi Electric CorporationInventors: Kensaku Hatanaka, Yuji Motomura
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Publication number: 20210325095Abstract: A refrigeration cycle apparatus according to the present invention performs cooling by circulation of refrigerant. The refrigeration cycle apparatus includes an evaporator, a condenser, a pump, a compressor, and a controller. The evaporator is arranged in a first space. The condenser is arranged in a second space. The pump is configured to compress refrigerant from the condenser and output the refrigerant to the evaporator. The compressor is configured to compress refrigerant from the evaporator and output the refrigerant to the condenser. The controller is configured to control the pump and the compressor to cool the first space. The controller is configured to turn on the pump after turn-on of the compressor while a temperature of the first space is higher than a temperature of the second space.Type: ApplicationFiled: June 28, 2021Publication date: October 21, 2021Inventors: Satoru YANACHI, Yusuke SHIMAZU, Kensaku HATANAKA, Kazuhiko KAWAI, Yusuke KOYAMA, Tomohiro NAGANO
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Patent number: 10976060Abstract: Provided is a heat pump hot water supply apparatus configured to directly supply water heated by a gas cooler to a utilization side. The heat pump hot water supply apparatus is configured to execute operation modes including a first operation mode and a second operation mode. The first operation mode includes causing the water heated by the gas cooler to return to a water tank as intermediate-temperature water. The second operation mode is an operation mode to be performed after the first operation mode, and includes mixing the water heated by the gas cooler and the intermediate-temperature water in the water tank, and directly supplying the mixed water to the utilization side.Type: GrantFiled: January 14, 2016Date of Patent: April 13, 2021Assignee: Mitsubishi Electric CorporationInventors: Kensaku Hatanaka, Toru Koide
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Publication number: 20200326112Abstract: A first valve is connected between a compressor and a first heat exchanger. A second valve is connected between the first heat exchanger and a expansion valve. When a start condition of the heating operation is satisfied and when a specific condition is satisfied, a controller starts supplying refrigerant from the compressor to the first valve, and then, opens the first and second valves. The specific condition is a condition indicating that a first heat exchange capability of the first heat exchanger is higher than a second heat exchange capability of a second heat exchanger. When the start condition of the heating operation is satisfied and when the specific condition is not satisfied, the controller opens the first and second valves, and then starts supplying the refrigerant from the compressor to the first valve.Type: ApplicationFiled: November 2, 2017Publication date: October 15, 2020Inventor: Kensaku HATANAKA
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Publication number: 20200049383Abstract: A refrigeration cycle apparatus includes a first refrigerant circuit including a first compressor, a first heat exchanger, a first refrigerant flow path of a second heat exchanger, a first expansion device, a third heat exchanger, and a second refrigerant flow path of a fourth heat exchanger, and a second refrigerant circuit including a second compressor, a fifth heat exchanger, a second expansion device, a third refrigerant flow path of the second heat exchanger, and a fourth refrigerant flow path of the fourth heat exchanger. A first refrigerant flows through, in order, the first compressor, the first heat exchanger, the first refrigerant flow path, the first expansion device, the third heat exchanger, and the second refrigerant flow path. The second refrigerant flows through, in order, of the second compressor, the fifth heat exchanger, the second expansion device, the third refrigerant flow path, and the fourth refrigerant flow path.Type: ApplicationFiled: November 22, 2016Publication date: February 13, 2020Inventors: Hisato MORITA, Kosuke TANAKA, Kensaku HATANAKA
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Publication number: 20190293333Abstract: A refrigeration cycle apparatus according to the present invention performs cooling by circulation of refrigerant. The refrigeration cycle apparatus includes an evaporator, a condenser, a pump, a compressor, and a control device. The evaporator is arranged in a first space. The condenser is arranged in a second space. The pump is configured to compress refrigerant from the condenser and output the refrigerant to the evaporator. The compressor is configured to compress refrigerant from the evaporator and output the refrigerant to the condenser. The control device is configured to control the pump and the compressor to cool the first space. The control device is configured to turn on the pump after turn-on of the compressor while a temperature of the first space is higher than a temperature of the second space.Type: ApplicationFiled: December 15, 2016Publication date: September 26, 2019Inventors: Satoru YANACHI, Yusuke SHIMAZU, Kensaku HATANAKA, Kazuhiko KAWAI, Yusuke KOYAMA, Tomohiro NAGANO
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Patent number: 10139125Abstract: An air-conditioning apparatus includes at least one system including a heat-medium conveying device, a heat-medium flow regulator, and a heat-medium flow control device, as a heat medium system capable of regulating a flow rate of a heat medium supplied to a heat source device-side heat exchanger exchanging heat between refrigerant and the heat medium. The air-conditioning apparatus switches each of a plurality of use-side heat exchangers to a cooling operation or a heating operation in accordance with a control command to perform a cooling and heating simultaneous operation. The refrigerant is caused to flow through the heat source device-side heat exchanger depending on a ratio of a total cooling capacity and a total heating capacity of the plurality of use-side heat exchangers.Type: GrantFiled: July 13, 2015Date of Patent: November 27, 2018Assignee: Mitsubishi Electric CorporationInventors: Koji Azuma, Hirofumi Koge, Osamu Morimoto, Kensaku Hatanaka, Kazuyoshi Shinozaki
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Publication number: 20180328596Abstract: Provided is a heat pump hot water supply apparatus configured to directly supply water heated by a gas cooler to a utilization side. The heat pump hot water supply apparatus is configured to execute operation modes including a first operation mode and a second operation mode. The first operation mode includes causing the water heated by the gas cooler to return to a water tank as intermediate-temperature water. The second operation mode is an operation mode to be performed after the first operation mode, and includes mixing the water heated by the gas cooler and the intermediate-temperature water in the water tank, and directly supplying the mixed water to the utilization side.Type: ApplicationFiled: January 14, 2016Publication date: November 15, 2018Inventors: Kensaku HATANAKA, Toru KOIDE
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Publication number: 20180328637Abstract: A refrigeration cycle apparatus in which a refrigerant having potential for disproportionation reaction circulates a first refrigerant flow path connected between a discharge side of the compressor and the condenser; a second refrigerant flow path connected between the condenser and the expansion valve; a third refrigerant flow path connected between the expansion valve and a suction side of the compressor; a jetting unit; a pressure measuring unit; and a temperature measuring unit. The jetting unit is configured to jet the refrigerant drawn from the second refrigerant flow path or the third refrigerant flow path to at least one of the compressor, the first refrigerant flow path and the second refrigerant flow path when at least one of a measured value of the pressure measuring unit and a measured value of the temperature measuring unit exceeds an allowed value.Type: ApplicationFiled: January 20, 2016Publication date: November 15, 2018Inventors: Takumi NISHIYAMA, Kosuke TANAKA, Kensaku HATANAKA
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Patent number: 10030894Abstract: An air-conditioning apparatus includes a heat medium system configured to control a flow rate of the heat medium supplied to the heat source unit side heat exchanger that exchanges heat between refrigerant and the heat medium, the heat medium system having at least one system of a heat medium conveyor, a heat medium flow rate adjuster, and a heat medium flow rate control device. In the air-conditioning apparatus, the operation of each of use-side heat exchangers is changed to a cooling operation or a heating operation in accordance with a control command, and a cooling and heating concurrent operation is performed. The refrigerant is caused to flow through the heat source unit side heat exchanger in accordance with the ratio of the total cooling capacity of the use-side heat exchangers to the total heating capacity of the use-side heat exchangers.Type: GrantFiled: July 13, 2015Date of Patent: July 24, 2018Assignee: Mitsubishi Electric CorporationInventors: Koji Azuma, Hirofumi Koge, Osamu Morimoto, Kensaku Hatanaka, Kazuyoshi Shinozaki
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Patent number: 9964343Abstract: A flow rate of circulating water to a water heat exchanger is determined by multiplying, by a rated water flow rate, a ratio of an absolute value of a difference between a total operation capacity of each of indoor side heat exchangers serving as a heating load and a total operation capacity of each of indoor side heat exchangers serving as a cooling load to a total operation capacity of the water heat exchanger.Type: GrantFiled: April 21, 2014Date of Patent: May 8, 2018Assignee: Mitsubishi Electric CorporationInventors: Kensaku Hatanaka, Kosuke Tanaka, Koji Azuma
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Publication number: 20180073782Abstract: A refrigeration cycle apparatus includes a heat source unit configured to supply refrigerant, a first distribution unit and a second distribution unit respectively connected to the heat source unit, and a distribution pipe located between the heat source unit and the first distribution unit and the second distribution unit for distributing the refrigerant flowing from the heat source unit into the first distribution unit and the second distribution unit. Further, the first distribution unit and the second distribution unit individually include a heat exchanger configured to serve as a condenser. Further, if the refrigerant flowing through the distribution pipe is unevenly distributed into the first distribution unit and the second distribution unit, a degree of subcooling at an outlet of the heat exchanger of one of the first distribution unit and the second distribution unit of which the distributed refrigerant is of high quality is increased.Type: ApplicationFiled: April 20, 2015Publication date: March 15, 2018Inventors: Kensaku HATANAKA, Yuji MOTOMURA
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Publication number: 20170198945Abstract: An air-conditioning apparatus includes a heat medium system configured to control a flow rate of the heat medium supplied to the heat source unit side heat exchanger that exchanges heat between refrigerant and the heat medium, the heat medium system having at least one system of a heat medium conveyor, a heat medium flow rate adjuster, and a heat medium flow rate control device. In the air-conditioning apparatus, the operation of each of use-side heat exchangers is changed to a cooling operation or a heating operation in accordance with a control command, and a cooling and heating concurrent operation is performed. The refrigerant is caused to flow through the heat source unit side heat exchanger in accordance with the ratio of the total cooling capacity of the use-side heat exchangers to the total heating capacity of the use-side heat exchangers.Type: ApplicationFiled: July 13, 2015Publication date: July 13, 2017Inventors: Koji AZUMA, Hirofumi KOGE, Osamu MORIMOTO, Kensaku HATANAKA, Kazuyoshi SHINOZAKI
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Publication number: 20170130996Abstract: A flow rate of circulating water to a water heat exchanger is determined by multiplying, by a rated water flow rate, a ratio of an absolute value of a difference between a total operation capacity of each of indoor side heat exchangers serving as a heating load and a total operation capacity of each of indoor side heat exchangers serving as a cooling load to a total operation capacity of the water heat exchanger.Type: ApplicationFiled: April 21, 2014Publication date: May 11, 2017Inventors: Kensaku HATANAKA, Kosuke TANAKA, Koji AZUMA
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Publication number: 20170097177Abstract: An air-conditioning apparatus includes at least one system including a heat-medium conveying device, a heat-medium flow regulator, and a heat-medium flow control device, as a heat medium system capable of regulating a flow rate of a heat medium supplied to a heat source device-side heat exchanger exchanging heat between refrigerant and the heat medium. The air-conditioning apparatus switches each of a plurality of use-side heat exchangers to a cooling operation or a heating operation in accordance with a control command to perform a cooling and heating simultaneous operation. The refrigerant is caused to flow through the heat source device-side heat exchanger depending on a ratio of a total cooling capacity and a total heating capacity of the plurality of use-side heat exchangers.Type: ApplicationFiled: July 13, 2015Publication date: April 6, 2017Inventors: Koji AZUMA, Hirofumi KOGE, Osamu MORIMOTO, Kensaku HATANAKA, Kazuyoshi SHINOZAKI
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Patent number: 9605885Abstract: An air conditioning system includes: first and second utilization side heat exchangers and a heat source side heat exchanger respectively connected in series; a compressor connected between the first utilization side heat exchanger and the heat source side heat exchanger; an expansion valve connected between the first utilization side heat exchanger and the second utilization side heat exchanger; a pressure control device connected between the second utilization side heat exchanger and the heat source side heat exchanger; and a bypass valve connected between the expansion valve and the heat source side heat exchanger. The bypass valve provides a variable amount of liquid refrigerant flowing from the expansion valve to the heat source side heat exchanger. The pressure control device and the bypass valve cooperate with each other to keep a temperature of the compressor below a maximum allowable temperature predetermined for the compressor.Type: GrantFiled: March 14, 2013Date of Patent: March 28, 2017Assignee: Mitsubishi Electric CorporationInventors: Kensaku Hatanaka, Kazuyoshi Shinozaki, Joseph Paul Bush, Peter Christian Flynn
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Patent number: 9482446Abstract: A heat pump water heater includes: a compressor; a first water-refrigerant heat exchanger; a second water-refrigerant heat exchanger; refrigerant paths capable of forming a refrigerant circuit; and water channels including a flow channel, the flow channel leading hot water that has passed through the second water-refrigerant heat exchanger to the first water-refrigerant heat exchanger. The heat pump water heater is able to perform a heating operation. In the heating operation, the hot water heated in the second water-refrigerant heat exchanger is fed to the first water-refrigerant heat exchanger and the hot water further heated in the first water-refrigerant heat exchanger is supplied to a downstream side of the water channels. The first water-refrigerant heat exchanger is able to be replaced without replacing the second water-refrigerant heat exchanger.Type: GrantFiled: July 23, 2013Date of Patent: November 1, 2016Assignee: Mitsubishi Electric CorporationInventors: So Nomoto, Kensaku Hatanaka, Keisuke Takayama