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).

  • Patent number: 11493248
    Abstract: 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: Grant
    Filed: October 19, 2016
    Date of Patent: November 8, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yasutaka Ochiai
  • Publication number: 20220178603
    Abstract: 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 at
    Type: Application
    Filed: June 4, 2019
    Publication date: June 9, 2022
    Inventor: Yasutaka OCHIAI
  • Patent number: 11340001
    Abstract: 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: Grant
    Filed: March 1, 2017
    Date of Patent: May 24, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasutaka Ochiai, Haruo Nakano, Hideki Tsukino, Ryohei Horiba, Yasuhiro Suzuki
  • Publication number: 20220082313
    Abstract: 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: Application
    Filed: February 28, 2019
    Publication date: March 17, 2022
    Inventor: Yasutaka OCHIAI
  • Publication number: 20220065511
    Abstract: 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: Application
    Filed: August 1, 2019
    Publication date: March 3, 2022
    Inventors: Yasutaka OCHIAI, Kazuhiro KOMATSU, Nobuaki TASAKI
  • Patent number: 10913326
    Abstract: 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: Grant
    Filed: June 10, 2016
    Date of Patent: February 9, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke Tashiro, Yasutaka Ochiai
  • Publication number: 20200340702
    Abstract: 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: Application
    Filed: January 25, 2018
    Publication date: October 29, 2020
    Inventors: Takehiro KOYANO, Yasutaka OCHIAI, Kosuke TANAKA, Yoshiaki KOIZUMI
  • Patent number: 10816248
    Abstract: 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: Grant
    Filed: June 9, 2016
    Date of Patent: October 27, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yasutaka Ochiai
  • Patent number: 10787183
    Abstract: 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: Grant
    Filed: June 9, 2016
    Date of Patent: September 29, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yasutaka Ochiai
  • Publication number: 20200189358
    Abstract: 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: Application
    Filed: June 10, 2016
    Publication date: June 18, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yusuke Tashiro, Yasutaka Ochiai
  • Patent number: 10654494
    Abstract: 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: Grant
    Filed: June 10, 2016
    Date of Patent: May 19, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke Tashiro, Mamoru Hamada, Yasutaka Ochiai
  • Patent number: 10598417
    Abstract: 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: Grant
    Filed: April 30, 2015
    Date of Patent: March 24, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasutaka Ochiai, Masaki Toyoshima, Makoto Saito
  • Publication number: 20190383533
    Abstract: 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: Application
    Filed: March 1, 2017
    Publication date: December 19, 2019
    Inventors: Yasutaka OCHIAI, Haruo NAKANO, Hideki TSUKINO, Ryohei HORIBA, Yasuhiro SUZUKI
  • Publication number: 20190293331
    Abstract: 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: Application
    Filed: June 9, 2016
    Publication date: September 26, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Yasutaka OCHIAI
  • Publication number: 20190293329
    Abstract: 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: Application
    Filed: October 19, 2016
    Publication date: September 26, 2019
    Inventor: Yasutaka OCHIAI
  • Publication number: 20190126949
    Abstract: 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: Application
    Filed: June 10, 2016
    Publication date: May 2, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke Tashiro, Mamoru Hamada, Yasutaka Ochiai
  • Patent number: 10274357
    Abstract: Provided is a refrigeration cycle apparatus including: a refrigerant circuit formed by connecting, by a refrigerant pipe, a compressor, a condenser, an expansion device, an evaporator and a liquid reservoir; a liquid level detection sensor including a plurality of heat generating units and a plurality of temperature detection units, the heat generating units being paired with the temperature detection units, and provided in the liquid reservoir, the liquid level detection sensor being configured to detect a liquid level of a refrigerant accumulated in the liquid reservoir, based on a temperature of each of the heat generating units, in which the liquid reservoir includes a container for accumulating the refrigerant, an inlet pipe connected to the refrigerant circuit and configured to allow a portion of the refrigerant flowing out of the container to flow into the container, and in which in the container, a shielding portion is provided between an discharge outlet for the refrigerant of the inlet pipe and the
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: April 30, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasutaka Ochiai, Makoto Saito, Masaki Toyoshima
  • Publication number: 20190111949
    Abstract: 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: Application
    Filed: June 9, 2016
    Publication date: April 18, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yasutaka Ochiai
  • Patent number: 10161661
    Abstract: A refrigeration cycle apparatus includes a refrigeration cycle in which refrigerant circulates, the refrigeration cycle including a compressor, an outdoor heat exchanger, expansion valves, and indoor heat exchangers, which are connected to each other via a refrigerant pipe, a heat source unit accommodating the outdoor heat exchanger, use-side units accommodating the indoor heat exchangers, and a control unit that controls at least turning on and off of the refrigeration cycle. The control unit detects abnormality of the refrigeration cycle based on the pressure or temperature of the refrigeration cycle in an off time of the refrigeration cycle.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: December 25, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasutaka Ochiai, Masaki Toyoshima, Takashi Okazaki
  • Patent number: 10151505
    Abstract: A mode selection unit selects a continuous operation mode when a dehumidifying operation is started. When an indoor temperature is less than or equal to a set first temperature threshold and indoor humidity is greater than a set humidity threshold in the continuous operation mode, the mode selection unit selects an intermittent operation mode. When the indoor temperature is less than or equal to a set second temperature threshold that is greater than the first temperature threshold and the indoor humidity is less than or equal to the set humidity threshold in the intermittent operation mode, the mode selection unit selects an operation stop mode.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: December 11, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasutaka Ochiai, Fumitake Unezaki, Makoto Saito, Kiyoshi Yoshimura, Ryoji Abe