Patents by Inventor Hiroshi Sata
Hiroshi Sata 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: 11959677Abstract: A refrigeration apparatus includes: a refrigerant circuit through which refrigerant circulates; a controller to execute a plurality of refrigerant shortage sensing functions of sensing a shortage of an amount of the refrigerant; and an input device through which an operation mode to be set is input into the controller. The operation mode includes: a first mode in which energy-saving performance is emphasized; and a second mode in which the refrigeration apparatus is permitted to operate in a range in which reliability is ensured. In accordance with the operation mode set through the input device, the controller determines which one of sensing results obtained by the refrigerant shortage sensing functions is enabled and which one of sensing results obtained by the refrigerant shortage sensing functions is disabled. When a sensing result determined to be enabled shows a refrigerant shortage, the controller gives a notification about the refrigerant shortage.Type: GrantFiled: April 9, 2019Date of Patent: April 16, 2024Assignee: Mitsubishi Electric CorporationInventors: Takanori Yashiro, Hiroshi Sata, Yusuke Arii
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Patent number: 11656015Abstract: A refrigeration cycle apparatus is a refrigeration cycle apparatus having a refrigerant circuit having a compressor, a condenser, a supercooler, an expansion device, and an evaporator connected by a refrigerant pipe, and configured to circulate refrigerant containing refrigerant having a temperature gradient, wherein the supercooler sets a degree of supercooling of the refrigerant, which is a temperature difference between a temperature from the condenser to a refrigerant flow inlet of the supercooler and a temperature in a refrigerant flow outlet on a downstream side of the supercooler, to be larger than the temperature gradient generated at a time of refrigerant shortage of the refrigerant between the refrigerant flow inlet and the refrigerant flow outlet of the supercooler, the refrigeration cycle apparatus including a refrigerant amount determination unit configured to compare a determination threshold value set to a value larger than the temperature gradient of the refrigerant with the degree of supercooType: GrantFiled: September 14, 2017Date of Patent: May 23, 2023Assignee: Mitsubishi Electric CorporationInventors: Hiroshi Sata, Tomotaka Ishikawa
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Publication number: 20230134047Abstract: A refrigeration cycle apparatus is a refrigeration cycle apparatus having a refrigerant circuit having a compressor, a condenser, a supercooler, an expansion device, and an evaporator connected by a refrigerant pipe, and configured to circulate refrigerant containing refrigerant having a temperature gradient, wherein the supercooler sets a degree of supercooling of the refrigerant, which is a temperature difference between a temperature from the condenser to a refrigerant flow inlet of the supercooler and a temperature in a refrigerant flow outlet on a downstream side of the supercooler, to be larger than the temperature gradient generated at a time of refrigerant shortage of the refrigerant between the refrigerant flow inlet and the refrigerant flow outlet of the supercooler, the refrigeration cycle apparatus including a refrigerant amount determination unit configured to compare a determination threshold value set to a value larger than the temperature gradient of the refrigerant with the degree of supercooType: ApplicationFiled: December 28, 2022Publication date: May 4, 2023Inventors: Hiroshi SATA, Tomotaka ISHIKAWA
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Publication number: 20220120484Abstract: A refrigeration apparatus includes: a refrigerant circuit through which refrigerant circulates; a controller to execute a plurality of refrigerant shortage sensing functions of sensing a shortage of an amount of the refrigerant; and an input device through which an operation mode to be set is input into the controller. The operation mode includes: a first mode in which energy-saving performance is emphasized; and a second mode in which the refrigeration apparatus is permitted to operate in a range in which reliability is ensured. In accordance with the operation mode set through the input device, the controller determines which one of sensing results obtained by the refrigerant shortage sensing functions is enabled and which one of sensing results obtained by the refrigerant shortage sensing functions is disabled. When a sensing result determined to be enabled shows a refrigerant shortage, the controller gives a notification about the refrigerant shortage.Type: ApplicationFiled: April 9, 2019Publication date: April 21, 2022Inventors: Takanori YASHIRO, Hiroshi SATA, Yusuke ARII
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Patent number: 11131490Abstract: The refrigerant device includes a refrigerant circuit, an injection circuit, an inlet temperature sensor, an outlet temperature sensor, and a controller configured to control the operation of the refrigerant circuit. The controller includes an evaluation value calculation unit and a refrigerant amount detection unit. The evaluation value calculation unit calculates an evaluation value indicating a capability of a subcooling heat exchanger in accordance with an inlet temperature detected by the inlet temperature sensor and an outlet temperature detected by the outlet temperature sensor. The refrigerant amount detection unit determines whether there is a shortage of refrigerant in accordance with the evaluation value calculated by the evaluation value calculation unit.Type: GrantFiled: May 9, 2016Date of Patent: September 28, 2021Assignee: Mitsubishi Electric CorporationInventors: Kohei Ueda, Abastari, Hiroshi Sata
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Publication number: 20200200457Abstract: A refrigeration cycle apparatus is a refrigeration cycle apparatus having a refrigerant circuit having a compressor, a condenser, a supercooler, an expansion device, and an evaporator connected by a refrigerant pipe, and configured to circulate refrigerant containing refrigerant having a temperature gradient, wherein the supercooler sets a degree of supercooling of the refrigerant, which is a temperature difference between a temperature from the condenser to a refrigerant flow inlet of the supercooler and a temperature in a refrigerant flow outlet on a downstream side of the supercooler, to be larger than the temperature gradient generated at a time of refrigerant shortage of the refrigerant between the refrigerant flow inlet and the refrigerant flow outlet of the supercooler, the refrigeration cycle apparatus including a refrigerant amount determination unit configured to compare a determination threshold value set to a value larger than the temperature gradient of the refrigerant with the degree of supercooType: ApplicationFiled: September 14, 2017Publication date: June 25, 2020Inventors: Hiroshi SATA, Tomotaka ISHIKAWA
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Publication number: 20190203995Abstract: The refrigerant device includes a refrigerant circuit, an injection circuit, an inlet temperature sensor, an outlet temperature sensor, and a controller configured to control the operation of the refrigerant circuit. The controller includes an evaluation value calculation unit and a refrigerant amount detection unit. The evaluation value calculation unit calculates an evaluation value indicating a capability of a subcooling heat exchanger in accordance with an inlet temperature detected by the inlet temperature sensor and an outlet temperature detected by the outlet temperature sensor. The refrigerant amount detection unit determines whether there is a shortage of refrigerant in accordance with the evaluation value calculated by the evaluation value calculation unit.Type: ApplicationFiled: May 9, 2016Publication date: July 4, 2019Inventors: Kohei UEDA, (no name) ABASTARI, Hiroshi SATA
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Patent number: 10254016Abstract: A refrigeration cycle apparatus includes: a low-stage refrigeration cycle including a low-stage compressor, a low-stage condenser, a low-stage pressure reducing device, and a low-stage evaporator, and circulating low-stage refrigerant; a high-stage refrigeration cycle including a high-stage compressor, a high-stage condenser, a high-stage pressure reducing device, and a high-stage evaporator, and circulating high-stage refrigerant; a cascade condenser exchanging heat between the low-stage refrigerant in the low-stage condenser and the high-stage refrigerant in the high-stage evaporator, and a controller. The low-stage refrigerant is a refrigerant that undergoes disproportionation. The low-stage refrigerant is maintained at a pressure lower than a disproportionation pressure at which the low-stage refrigerant undergoes disproportionation.Type: GrantFiled: March 17, 2014Date of Patent: April 9, 2019Assignees: Mitsubishi Electric Corporation, AGC INC.Inventors: Hiroshi Sata, Tomotaka Ishikawa, Takashi Ikeda, Yusuke Arii
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Patent number: 9651288Abstract: A refrigeration apparatus includes a compressor receiving refrigerant through an injection pipe and of discharging the refrigerant, a condenser, an electronic expansion valve connected by piping to another end of the injection pipe, a subcooling coil, a solenoid valve configured to control inflowing of the refrigerant through the injection pipe into the compressor, an injection bypass pipe connecting the injection pipe and a pipe on a suction side of the compressor, a solenoid valve configured to control passage of the refrigerant flowing through the injection bypass pipe, a high-low pressure bypass pipe connecting a pipe on a discharge side of the compressor and the pipe on the suction side of the compressor, a solenoid valve configured to control passage of the refrigerant through the high-low pressure bypass pipe, and a controller configured to control a frequency of the compressor and opening and closing of each of the solenoid valves.Type: GrantFiled: March 30, 2012Date of Patent: May 16, 2017Assignee: Mitsubishi Electric CorporationInventors: Kenichi Hata, Hiroshi Sata
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Publication number: 20170121581Abstract: A heat pump apparatus is provided in which refrigerant circulates between an indoor unit and an outdoor unit, wherein the refrigerant is a mixed refrigerant of HFO-1123 and an HFC refrigerant other than HFO-1123, the outdoor unit has a cooling capacity (kW) in the range of 2.2 to 9.5 kW, the outer diameter ? (mm) of a gas pipe between the indoor unit and the outdoor unit and the cooling capacity (kW) of the outdoor unit satisfy the relation (1.00?outer diameter ? (mm) of gas pipe/cooling capacity (kW) of outdoor unit?5.77), and the outer diameter ? (mm) of a liquid pipe between the indoor unit and the outdoor unit and the cooling capacity (kW) of the outdoor unit satisfy the relation (0.67?outer diameter ? (mm) of liquid pipe/cooling capacity (kW) of outdoor unit?5.77).Type: ApplicationFiled: March 17, 2014Publication date: May 4, 2017Inventors: Shinya HORIIKE, Hiroyuki MORIMOTO, Hiroshi SATA
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Publication number: 20170108247Abstract: A refrigeration cycle apparatus includes: a low-stage refrigeration cycle including a low-stage compressor, a low-stage condenser, a low-stage pressure reducing device, and a low-stage evaporator, and circulating low-stage refrigerant; a high-stage refrigeration cycle including a high-stage compressor, a high-stage condenser, a high-stage pressure reducing device, and a high-stage evaporator, and circulating high-stage refrigerant; a cascade condenser exchanging heat between the low-stage refrigerant in the low-stage condenser and the high-stage refrigerant in the high-stage evaporator, and a controller. The low-stage refrigerant is a refrigerant that undergoes disproportionation. The low-stage refrigerant is maintained at a pressure lower than a disproportionation pressure at which the low-stage refrigerant undergoes disproportionation.Type: ApplicationFiled: March 17, 2014Publication date: April 20, 2017Inventors: Hiroshi SATA, Tomotaka ISHIKAWA, Takashi IKEDA, Yusuke ARII
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Patent number: 9541313Abstract: A refrigerating device that forms a refrigerating cycle in which a plurality of outdoor machines 1a and 1b provided at least with compressors 2a and 2b, condensers 4a and 4b, and accumulators 5a and 5b respectively and an indoor machine 20 provided with decompressing means 21 and an evaporator 22 are connected in parallel by piping, having oil return pipes 13a and 13b that return refrigerator oil stored in the accumulators into the compressors, an oil equalizing pipe 10 that connects the accumulators to each other, and a controller 30 that controls an operation of the compressor and on/off of an electromagnetic valve 12a deposed on the oil equalizing pipe.Type: GrantFiled: March 11, 2010Date of Patent: January 10, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi Ikeda, Tomotaka Ishikawa, Hiroshi Sata, Fumitake Unezaki
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Publication number: 20150052925Abstract: A refrigeration apparatus includes a compressor receiving refrigerant through an injection pipe and of discharging the refrigerant, a condenser, an electronic expansion valve connected by piping to another end of the injection pipe, a subcooling coil, a solenoid valve configured to control inflowing of the refrigerant through the injection pipe into the compressor, an injection bypass pipe connecting the injection pipe and a pipe on a suction side of the compressor, a solenoid valve configured to control passage of the refrigerant flowing through the injection bypass pipe, a high-low pressure bypass pipe connecting a pipe on a discharge side of the compressor and the pipe on the suction side of the compressor, a solenoid valve configured to control passage of the refrigerant through the high-low pressure bypass pipe, and a controller configured to control a frequency of the compressor and opening and closing of each of the solenoid valves.Type: ApplicationFiled: March 30, 2012Publication date: February 26, 2015Applicant: Mitsubishi Electric CorporationInventors: Kenichi Hata, Hiroshi Sata
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Publication number: 20120006041Abstract: A refrigerating device that forms a refrigerating cycle in which a plurality of outdoor machines 1a and 1b provided at least with compressors 2a and 2b, condensers 4a and 4b, and accumulators 5a and 5b respectively and an indoor machine 20 provided with decompressing means 21 and an evaporator 22 are connected in parallel by piping, having oil return pipes 13a and 13b that return refrigerator oil stored in the accumulators into the compressors, an oil equalizing pipe 10 that connects the accumulators to each other, and a controller 30 that controls an operation of the compressor and on/off of an electromagnetic valve 12a deposed on the oil equalizing pipe.Type: ApplicationFiled: March 11, 2010Publication date: January 12, 2012Inventors: Takashi Ikeda, Tomotaka Ishikawa, Hiroshi Sata, Fumitake Unezaki
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Patent number: D681072Type: GrantFiled: May 3, 2012Date of Patent: April 30, 2013Assignee: Mitsubishi Electric CorporationInventors: Hiroshi Sata, Kenichi Hata
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Patent number: D681076Type: GrantFiled: May 3, 2012Date of Patent: April 30, 2013Assignee: Mitsubishi Electric CorporationInventors: Hiroshi Sata, Kenichi Hata
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Patent number: D788189Type: GrantFiled: April 24, 2015Date of Patent: May 30, 2017Assignee: Mitsubishi Electric CorporationInventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata
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Patent number: D798345Type: GrantFiled: April 29, 2015Date of Patent: September 26, 2017Assignee: Mitsubishi Electric CorporationInventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata
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Patent number: D800186Type: GrantFiled: January 26, 2017Date of Patent: October 17, 2017Assignee: Mitsubishi Electric CorporationInventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata
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Patent number: D800802Type: GrantFiled: January 26, 2017Date of Patent: October 24, 2017Assignee: Mitsubishi Eiectric CorporationInventors: Koichi Maeda, Kenichiro Toriumi, Ataru Nakamura, Hajime Fujimoto, Hiroshi Sata