Patents by Inventor Yasutaka Ochiai
Yasutaka Ochiai 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: 11906185Abstract: A state analysis device and a state analyzer system include a specific state determination unit that determines specific state information representing a state of refrigerant at a specific position in a refrigeration circuit and a normal region determination unit that determines a normal region in a state space within which the specific state information is present when an air-conditioning apparatus operates under a normal state. The state analysis device and the state analyzer system allow a display to display the specific state information and the normal region.Type: GrantFiled: January 25, 2018Date of Patent: February 20, 2024Assignee: Mitsubishi Electric CorporationInventors: Takehiro Koyano, Yasutaka Ochiai, Kosuke Tanaka, Yoshiaki Koizumi
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Publication number: 20240044539Abstract: An operation data acquisition unit acquires from an air conditioning system, operation data of the air conditioning system. A model application determination unit determines whether or not the operation data satisfies an application condition for applying the operation data to an inference model for inferring status of the air conditioning system. Further, the model application determination unit stores the operation data into an operation data holding unit as pending operation data, when the operation data does not satisfy the application condition. A model updating unit determines whether or not the pending operation data is operation data suitable for an update of the inference model, and updates the inference model using the pending operation data, when it is determined that the pending operation data is the operation data suitable for the update of the inference model.Type: ApplicationFiled: February 15, 2021Publication date: February 8, 2024Inventors: Takahiro HASHIKAWA, Yasutaka OCHIAI
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Patent number: 11874039Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit, a bypass flow path, a first valve provided in the refrigeration cycle circuit, a second valve provided at the bypass flow path, a first temperature sensor configured to detect a temperature of an indoor space, a second temperature sensor configured to detect a temperature of refrigerant on a liquid side of an indoor heat exchanger, and a notification part. The refrigeration cycle apparatus is able to operate in an operation state where the compressor operates, the indoor heat exchanger functions as an evaporator, and the first valve is open while the second valve is closed. In the operation state, the notification part issues notification of an abnormality of an electronic expansion valve or the first valve when a temperature detected by the second temperature sensor is higher than an evaporation temperature of refrigerant in the refrigeration cycle circuit.Type: GrantFiled: August 1, 2019Date of Patent: January 16, 2024Assignee: Mitsubishi Electric CorporationInventors: Yasutaka Ochiai, Kazuhiro Komatsu, Nobuaki Tasaki
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Publication number: 20230221050Abstract: A refrigeration cycle apparatus comprises a refrigerant circuit, a water circuit, and a control device. The refrigerant circuit includes a compressor, a four-way valve, a heat exchanger, a fan, a diaphragm mechanism, a water heat exchanger, and an accumulator. Based on a value of a low-pressure sensor or a high-pressure sensor and a water temperature on an outlet side of the water heat exchanger, the refrigeration cycle apparatus determines whether or not there is an abnormality due to dirtiness adhered to a plate inside the water heat exchanger.Type: ApplicationFiled: June 9, 2020Publication date: July 13, 2023Inventors: Tadayuki MATSUSHITA, Yasutaka OCHIAI, Naohiro ICHIKAWA, Katsuya TANIGUCHI
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Publication number: 20230124335Abstract: A refrigeration cycle apparatus includes an outdoor unit a plurality of indoor units a relay unit a refrigerant circuit and a controller The relay unit includes a plurality of high-pressure valves and a plurality of low-pressure valves The controller when an operation state of at least one of the indoor units is changed from a first state to a second state, judges, based on a degree of supercooling of an outlet of the outdoor heat exchanger or the indoor heat exchanger or based on a degree of superheating of a suction side of the compressor, whether an abnormality is present in the plurality of high-pressure valves or the plurality of low-pressure valves.Type: ApplicationFiled: June 10, 2020Publication date: April 20, 2023Inventor: Yasutaka OCHIAI
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Publication number: 20230089678Abstract: A refrigeration cycle apparatus includes: a refrigerant circuit in which a compressor, a condenser, an expansion device, and an evaporator are connected by pipes, and refrigerant circulates; a high-pressure sensor that detects a pressure of the refrigerant on a discharge side of the compressor; a first temperature sensor that detects a temperature of the refrigerant on an outlet side of the condenser; and a controller that determines that the high-pressure sensor is abnormal, when the compressor is in operation and the temperature detected by the first temperature sensor is higher than a saturated liquid temperature or a saturated gas temperature that is calculated from the pressure detected by the high-pressure sensor.Type: ApplicationFiled: May 20, 2020Publication date: March 23, 2023Inventor: Yasutaka OCHIAI
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Publication number: 20220397320Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit that has a compressor, a condenser, an expansion device, and an evaporator that are connected through a pipe, the refrigeration cycle circuit being configured to allow refrigerant to circulate in the refrigeration cycle circuit, and a controller configured to determine whether the refrigerant leaks or whether the expansion device malfunctions on the basis of a degree of subcooling at an outlet of the condenser and a degree of superheat at an outlet of the evaporator or a degree of superheat at a suction port of the compressor.Type: ApplicationFiled: May 22, 2020Publication date: December 15, 2022Inventors: Yasutaka OCHIAI, Nobuaki TASAKI, Fuyuki SATO
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Patent number: 11493248Abstract: A liquid level detection device that is provided in a vessel and configured to detect a liquid level of fluid stored in the vessel includes a first plate formed in a plate shape, and a second plate formed in a plate shape and disposed to face the first plate. The first plate is disposed in such a manner that a surface opposite to a surface facing the second plate is orthogonal to a flow direction of fluid around the first plate in the vessel.Type: GrantFiled: October 19, 2016Date of Patent: November 8, 2022Assignee: Mitsubishi Electric CorporationInventor: Yasutaka Ochiai
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Publication number: 20220178603Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit connecting a compressor, a refrigerant flow switching device, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, a first junction portion provided between the outdoor heat exchanger and the expansion valve and configured to divide refrigerant, a second junction portion provided between the indoor heat exchanger and the refrigerant flow switching device and configured to divide the refrigerant, a bypass pipe connecting the first junction portion and the second junction portion and configured to cause the refrigerant to flow through the bypass pipe, a first valve provided between the second junction portion and the refrigerant flow switching device, a second valve provided to the bypass pipe, a first temperature sensor configured to measure a temperature in a room to which air passing through the indoor heat exchanger is provided, and a second temperature sensor configured to measure a temperature of refrigerant atType: ApplicationFiled: June 4, 2019Publication date: June 9, 2022Inventor: Yasutaka OCHIAI
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Patent number: 11340001Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit, a liquid receiver, a first valve and a second valve. The refrigeration cycle circuit includes a compressor, an outdoor heat exchanger and an indoor heat exchanger. The liquid receiver is provided in a second section located in the refrigeration cycle circuit. The second section is a section extending between the outdoor heat exchanger and the indoor heat exchanger without extending through the compressor. The first valve is provided in a first section in the refrigeration cycle circuit, and is a solenoid valve or a motor valve. The first section is a section extending between the outdoor heat exchanger and the indoor heat exchanger through the compressor. The second valve is provided in the second section and between the liquid receiver and the indoor heat exchanger, and is an electronic expansion valve, a solenoid valve or a motor valve.Type: GrantFiled: March 1, 2017Date of Patent: May 24, 2022Assignee: Mitsubishi Electric CorporationInventors: Yasutaka Ochiai, Haruo Nakano, Hideki Tsukino, Ryohei Horiba, Yasuhiro Suzuki
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Publication number: 20220082313Abstract: During operation of a compressor, an indoor heat exchanger operates as a condenser, a first valve between a second junction portion and a refrigerant flow switching device is closed, and a second valve in a bypass pipe connecting a first junction portion and the second junction portion is opened, a refrigeration cycle apparatus detects an abnormality when a temperature obtained by subtracting a temperature of refrigerant at a gas portion of the indoor heat exchanger measured by a third temperature sensor from a saturation temperature obtained by converting a condensing pressure of the refrigerant is larger than a first threshold temperature, or when a temperature obtained by subtracting a temperature in a room measured by a first temperature sensor from a temperature of refrigerant at a liquid portion of the indoor heat exchanger measured by a second temperature sensor is smaller than a second threshold temperature.Type: ApplicationFiled: February 28, 2019Publication date: March 17, 2022Inventor: Yasutaka OCHIAI
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Publication number: 20220065511Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit, a bypass flow path, a first valve provided in the refrigeration cycle circuit, a second valve provided at the bypass flow path, a first temperature sensor configured to detect a temperature of an indoor space, a second temperature sensor configured to detect a temperature of refrigerant on a liquid side of an indoor heat exchanger, and a notification part. The refrigeration cycle apparatus is able to operate in an operation state where the compressor operates, the indoor heat exchanger functions as an evaporator, and the first valve is open while the second valve is closed. In the operation state, the notification part issues notification of an abnormality of an electronic expansion valve or the first valve when a temperature detected by the second temperature sensor is higher than an evaporation temperature of refrigerant in the refrigeration cycle circuit.Type: ApplicationFiled: August 1, 2019Publication date: March 3, 2022Inventors: Yasutaka OCHIAI, Kazuhiro KOMATSU, Nobuaki TASAKI
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Patent number: 10913326Abstract: A vehicle air-conditioning apparatus includes a refrigerant circuit and a control unit which controls the refrigerant circuit, and is mounted on a vehicle. The control unit determines whether or not the vehicle is stationary based on position information or speed information on the vehicle, causes the refrigerant circuit to operate when the vehicle is stationary, acquires state data on the refrigerant circuit at the time when the vehicle is stationary, and detects whether abnormality occurs in the refrigerant circuit based on the state data.Type: GrantFiled: June 10, 2016Date of Patent: February 9, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yusuke Tashiro, Yasutaka Ochiai
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Publication number: 20200340702Abstract: Provided is a state analysis device and a state analyzer system that include a specific state determination unit configured to determine specific state information representing a state of refrigerant at a specific position in a refrigeration circuit and a normal region determination unit configured to determine a normal region in a state space within which the specific state information is present when an air-conditioning apparatus operates under a normal state. The state analysis device and the state analyzer system allow a display unit to display the specific state information and the normal region.Type: ApplicationFiled: January 25, 2018Publication date: October 29, 2020Inventors: Takehiro KOYANO, Yasutaka OCHIAI, Kosuke TANAKA, Yoshiaki KOIZUMI
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Patent number: 10816248Abstract: A refrigeration cycle apparatus in which a compressor, a heat-source-side heat exchanger, a decompressor, and a use-side heat exchanger are connected by pipes to allow refrigerant to be circuited as a refrigeration cycle. The refrigeration cycle apparatus includes a controller which controls an operation of each of devices. The controller sets an operation mode to a specific operation mode for determining where abnormality occurs based on states of the compressor, the heat-source-side heat exchanger, the decompressor and the use-side heat exchanger in the case where an operating state of one of a plurality of element devices to be controlled by the controller is changed from a first state to a second state, the element devices being included in the compressor, the heat-source-side heat exchanger, the decompressor and the use-side heat exchanger.Type: GrantFiled: June 9, 2016Date of Patent: October 27, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Yasutaka Ochiai
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Patent number: 10787183Abstract: A railway vehicle air conditioning management system according to the present invention includes a railway vehicle air-conditioning device installed in a railway vehicle, having a refrigerant circuit configured by including at least a compressor, a heat source side heat exchanger, a decompression device and a load side heat exchanger, and air-conditions an inside of the railway vehicle by circulating refrigerant in the refrigerant circuit, and a management device having a recording device in which vehicle air conditioning data including data showing operating states of the railway vehicle air-conditioning devices in a plurality of the railway vehicles are recorded, the railway vehicle air-conditioning device performs a special operation of operating in a pattern set in advance, in a state without humans in the railway vehicle, and the management device causes the recording device to record the vehicle air conditioning data including data showing the operating state in the special operation.Type: GrantFiled: June 9, 2016Date of Patent: September 29, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Yasutaka Ochiai
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Publication number: 20200189358Abstract: A vehicle air-conditioning apparatus includes a refrigerant circuit and a control unit which controls the refrigerant circuit, and is mounted on a vehicle. The control unit determines whether or not the vehicle is stationary based on position information or speed information on the vehicle, causes the refrigerant circuit to operate when the vehicle is stationary, acquires state data on the refrigerant circuit at the time when the vehicle is stationary, and detects whether abnormality occurs in the refrigerant circuit based on the state data.Type: ApplicationFiled: June 10, 2016Publication date: June 18, 2020Applicant: Mitsubishi Electric CorporationInventors: Yusuke Tashiro, Yasutaka Ochiai
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Patent number: 10654494Abstract: A vehicle air-conditioning apparatus includes a refrigeration cycle that performs air-conditioning in a vehicle interior of a vehicle; a controller that includes a plurality of operation modes with different continuous operation times for a compressor, and that selects one operation mode from among the plurality of operation modes according to an air-conditioning load in the vehicle interior and executes the one operation mode, during travel operation of the vehicle; a storage unit; and a fault diagnosis unit. The fault diagnosis unit performs, during travel operation of the vehicle, fault diagnosis for the refrigeration cycle, after the high-load operation mode from among the plurality of operation modes, in which the continuous operation time is equal to or longer than a time that is set in advance is selected and executed by the controller at the timing stored in advance in the storage unit and while the refrigeration cycle is stable.Type: GrantFiled: June 10, 2016Date of Patent: May 19, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yusuke Tashiro, Mamoru Hamada, Yasutaka Ochiai
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Patent number: 10598417Abstract: A refrigeration cycle apparatus is provided with a compressor, a condenser, a pressure-reducing device, and an evaporator. The refrigeration cycle apparatus comprises a refrigeration cycle configured to circulate refrigerant; and a control unit configured to control the refrigeration cycle. The control unit causes the refrigeration cycle to operate when an operation condition is satisfied, the operation condition including elapse of a preset time after the control unit stops the refrigeration cycle. The control unit detects abnormality of the refrigeration cycle based on state data indicating a state of the refrigeration cycle after the control unit causes the refrigeration cycle to operate.Type: GrantFiled: April 30, 2015Date of Patent: March 24, 2020Assignee: Mitsubishi Electric CorporationInventors: Yasutaka Ochiai, Masaki Toyoshima, Makoto Saito
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Publication number: 20190383533Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit, a liquid receiver, a first valve and a second valve. The refrigeration cycle circuit includes a compressor, an outdoor heat exchanger and an indoor heat exchanger. The liquid receiver is provided in a second section located in the refrigeration cycle circuit. The second section is a section extending between the outdoor heat exchanger and the indoor heat exchanger without extending through the compressor. The first valve is provided in a first section in the refrigeration cycle circuit, and is a solenoid valve or a motor valve. The first section is a section extending between the outdoor heat exchanger and the indoor heat exchanger through the compressor. The second valve is provided in the second section and between the liquid receiver and the indoor heat exchanger, and is an electronic expansion valve, a solenoid valve or a motor valve.Type: ApplicationFiled: March 1, 2017Publication date: December 19, 2019Inventors: Yasutaka OCHIAI, Haruo NAKANO, Hideki TSUKINO, Ryohei HORIBA, Yasuhiro SUZUKI