Patents by Inventor Chitose TANAKA
Chitose TANAKA 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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Publication number: 20230375195Abstract: A branch unit includes a first heat exchanger and a second heat exchanger, a first pump, a second pump, a plurality of first ports, a plurality of second ports, a flow path switching unit, a plurality of forward path side heaters, and a plurality of first temperature sensors. The plurality of forward path side heaters are respectively provided for a plurality of forward path side pipes through which a second heat medium is sent to the plurality of first ports. The plurality of first temperature sensors are respectively arranged, at the plurality of forward path side pipes, downstream of the plurality of forward path side heaters.Type: ApplicationFiled: December 9, 2020Publication date: November 23, 2023Inventor: Chitose TANAKA
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Patent number: 11802722Abstract: A refrigeration cycle apparatus includes: a first refrigerant route; and a second refrigerant route. In the first refrigerant route, refrigerant flows in order of a compressor, a first heat exchanger, a first pipe, a second heat exchanger, a low pressure receiver and the compressor. The second refrigerant route is connected to the first pipe and the low pressure receiver, the first pipe being connected to the first heat exchanger and the second heat exchanger in the first refrigerant route. The second refrigerant route includes an electric pump. The electric pump is configured to flow the refrigerant from the low pressure receiver to the first pipe.Type: GrantFiled: September 5, 2018Date of Patent: October 31, 2023Assignee: Mitsubishi Electric CorporationInventors: Chitose Tanaka, So Nomoto
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Publication number: 20230251014Abstract: A refrigerating and air-conditioning apparatus that performs defrosting operation, the refrigerating and air-conditioning apparatus including: a refrigerant circuit in which a compressor, a first heat exchanger, an expansion device, a second heat exchanger, and a four-way valve are connected to each other by pipes to allow refrigerant to circulate through the refrigerant circuit; a temperature sensor configured to measure a temperature of the compressor; and a heat generation control unit configured to increase a temperature of the compressor when the heat generation control unit detects a decrease in a value measured by the temperature sensor in defrosting operation performed on the first heat exchanger.Type: ApplicationFiled: August 21, 2020Publication date: August 10, 2023Inventors: Kazunori SAKANOBE, Kenta YUASA, Yasuhiko WADA, Chitose TANAKA
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Patent number: 11365914Abstract: A refrigeration cycle apparatus includes: an outdoor unit; a branch unit connected to the outdoor unit via a first pipe and a second pipe; a first indoor unit connected to the branch unit via a third pipe and a fourth pipe; and a second indoor unit connected to the branch unit via a fifth pipe and a sixth pipe. A refrigerant circuit includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a six-way valve. The six-way valve switches between a first state in which the first heat exchanger acts as a condenser and at least the second heat exchanger acts as an evaporator and a second state in which the first heat exchanger acts as an evaporator and at least the second heat exchanger acts as a condenser.Type: GrantFiled: May 11, 2018Date of Patent: June 21, 2022Assignee: Mitsubishi Electric CorporationInventor: Chitose Tanaka
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Publication number: 20210364201Abstract: A refrigeration cycle apparatus includes: a first refrigerant route; and a second refrigerant route. In the first refrigerant route, refrigerant flows in order of a compressor, a first heat exchanger, a first pipe, a second heat exchanger, a low pressure receiver and the compressor. The second refrigerant route is connected to the first pipe and the low pressure receiver, the first pipe being connected to the first heat exchanger and the second heat exchanger in the first refrigerant route. The second refrigerant route includes an electric pump. The electric pump is configured to flow the refrigerant from the low pressure receiver to the first pipe.Type: ApplicationFiled: September 5, 2018Publication date: November 25, 2021Inventors: Chitose TANAKA, So NOMOTO
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Patent number: 11175082Abstract: A refrigeration cycle apparatus causes refrigerant to circulate through a compressor, an indoor heat exchanger, an outdoor heat exchanger, a heat storage body, a first expansion valve, and a second expansion valve. The refrigeration cycle apparatus includes a bypass path and a first on-off valve provided in the bypass path. The bypass path branches off from a first portion that connects the indoor heat exchanger and the first expansion valve in a first refrigerant pipe, and leads to a fourth refrigerant pipe that connects a suction port of the compressor and a four-way valve. The first on-off valve is opened in a defrosting operation.Type: GrantFiled: April 27, 2017Date of Patent: November 16, 2021Assignee: Mitsubishi Electric CorporationInventor: Chitose Tanaka
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Publication number: 20210215406Abstract: An air conditioning apparatus includes a first pump and a first intermediate heat exchanger connected in series, and a second pump and a second heat intermediate exchanger connected in series. A flow path switching mechanism including at least four pairs of first and second valves. The first valves select an outflow port of one of the first and second pumps, and the second valves select an inflow port of the other of the first and second pumps. A third intermediate heat exchanger operates as an auxiliary heat exchanger, and is detachably connected to one pair of first and second valves. A pipe is detachably connected to and communicating the inflow port and the outflow port of a second pair of the pairs of the first and second valves. At least one indoor heat exchanger is connected to a third pair of the first and second valves.Type: ApplicationFiled: January 10, 2020Publication date: July 15, 2021Inventor: Chitose TANAKA
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Patent number: 11015851Abstract: A refrigeration cycle device performs a heating operation and a defrosting operation. A refrigerant circulates in opposite directions in the defrosting operation and the heating operation. The refrigeration cycle device includes a compressor, a first heat exchanger and a second heat exchanger, a decompressor, and a flow path switch. In the heating operation, the refrigerant circulates in the order of the compressor, the first heat exchanger, the decompressor, and the second heat exchanger. In the defrosting operation, the refrigerant circulates in the order of the compressor, the second heat exchanger, the decompressor, and the first heat exchanger. The defrosting operation includes a first mode and a second mode. The opening of the decompressor is greater in the first mode than in the heating operation. The opening of the decompressor is less in the second mode than in the first mode.Type: GrantFiled: July 7, 2017Date of Patent: May 25, 2021Assignee: Mitsubishi Electric CorporationInventor: Chitose Tanaka
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Publication number: 20210063033Abstract: A refrigeration cycle apparatus includes: an outdoor unit; a branch unit connected to the outdoor unit via a first pipe and a second pipe; a first indoor unit connected to the branch unit via a third pipe and a fourth pipe; and a second indoor unit connected to the branch unit via a fifth pipe and a sixth pipe. A refrigerant circuit includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a six-way valve. The six-way valve switches between a first state in which the first heat exchanger acts as a condenser and at least the second heat exchanger acts as an evaporator and a second state in which the first heat exchanger acts as an evaporator and at least the second heat exchanger acts as a condenser.Type: ApplicationFiled: May 11, 2018Publication date: March 4, 2021Inventor: Chitose TANAKA
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Publication number: 20210048233Abstract: The flow path switching valve includes a valve seat which is provided with a valve chamber and first to fourth openings in communication with the valve chamber, and a valve body which is movable in the valve chamber. When the valve body is located at a first position, a first flow path which connects the first opening to the second opening and a second flow path which connects the third opening to the fourth opening and is partitioned from the first flow path are formed in the valve chamber. When the valve body is located at a second position, a third flow path which connects the second opening to the third opening and is partitioned from the first opening and the fourth opening is formed in the valve chamber, and the first opening and the fourth opening are shielded from each other.Type: ApplicationFiled: February 23, 2018Publication date: February 18, 2021Inventor: Chitose TANAKA
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Patent number: 10816242Abstract: A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger are connected by pipes. The first heat exchanger includes a first refrigerant passage and a second refrigerant passage that share a plurality of fins with each other and provided in parallel in the refrigerant circuit. The apparatus further includes a high-and-low-pressure switching mechanism which is located on an inlet side of the second refrigerant passage of the first heat exchanger in flowing of refrigerant in an operation in which the first heat exchanger functions as a condenser, and which performs switching between flow directions of the refrigerant. The apparatus further includes a refrigerant blocking mechanism located on an outlet side of the second refrigerant passage of the first heat exchanger in the flowing of the refrigerant in the operation, and which blocks the flowing of the refrigerant.Type: GrantFiled: July 29, 2016Date of Patent: October 27, 2020Assignee: Mitsubishi Electric CorporationInventors: Chitose Tanaka, Takuya Matsuda, Kosuke Tanaka
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Patent number: 10775082Abstract: A refrigerant circuit of a refrigeration cycle apparatus has a compressor, a cooling-heating switching mechanism, a condenser, a refrigerant expansion mechanism, and an evaporator. During operation of the compressor, the refrigerant expansion mechanism opens the refrigerant circuit, a first three-way valve connects an outlet of the compressor to the condenser, and a second three-way valve connects an inlet of the compressor to the evaporator. During stop of the compressor, the refrigerant expansion mechanism closes the refrigerant circuit, the first three-way valve connects the outlet of the compressor to the evaporator, and the second three-way valve connects the inlet of the compressor to the evaporator.Type: GrantFiled: April 7, 2016Date of Patent: September 15, 2020Assignee: Mitsubishi Electric CorporationInventors: Chitose Tanaka, Takuya Matsuda, Kosuke Tanaka
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Publication number: 20200124328Abstract: A refrigeration cycle device performs a heating operation and a defrosting operation. A refrigerant circulates in opposite directions in the defrosting operation and the heating operation. The refrigeration cycle device includes a compressor, a first heat exchanger and a second heat exchanger, a decompressor, and a flow path switch. In the heating operation, the refrigerant circulates in the order of the compressor, the first heat exchanger, the decompressor, and the second heat exchanger. In the defrosting operation, the refrigerant circulates in the order of the compressor, the second heat exchanger, the decompressor, and the first heat exchanger. The defrosting operation includes a first mode and a second mode. The opening of the decompressor is greater in the first mode than in the heating operation. The opening of the decompressor is less in the second mode than in the first mode.Type: ApplicationFiled: July 7, 2017Publication date: April 23, 2020Inventor: Chitose TANAKA
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Publication number: 20200049392Abstract: A refrigeration cycle apparatus causes refrigerant to circulate through a compressor, an indoor heat exchanger, an outdoor heat exchanger, a heat storage body, a first expansion valve, and a second expansion valve. The refrigeration cycle apparatus includes a bypass path and a first on-off valve provided in the bypass path. The bypass path branches off from a first portion that connects the indoor heat exchanger and the first expansion valve in a first refrigerant pipe, and leads to a fourth refrigerant pipe that connects a suction port of the compressor and a four-way valve. The first on-off valve is opened in a defrosting operation.Type: ApplicationFiled: April 27, 2017Publication date: February 13, 2020Inventor: Chitose TANAKA
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Publication number: 20190203989Abstract: A refrigerant circuit of a refrigeration cycle apparatus has a compressor, a cooling-heating switching mechanism, a condenser, a refrigerant expansion mechanism, and an evaporator. During operation of the compressor, the refrigerant expansion mechanism opens the refrigerant circuit, a first three-way valve connects an outlet of the compressor to the condenser, and a second three-way valve connects an inlet of the compressor to the evaporator. During stop of the compressor, the refrigerant expansion mechanism closes the refrigerant circuit, the first three-way valve connects the outlet of the compressor to the evaporator, and the second three-way valve connects the inlet of the compressor to the evaporator.Type: ApplicationFiled: April 7, 2016Publication date: July 4, 2019Inventors: Chitose TANAKA, Takuya MATSUDA, Kosuke TANAKA
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Publication number: 20190145669Abstract: A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger are connected by pipes. The first heat exchanger includes a first refrigerant passage and a second refrigerant passage that share a plurality of fins with each other and provided in parallel in the refrigerant circuit. The apparatus further includes a high-and-low-pressure switching mechanism which is located on an inlet side of the second refrigerant passage of the first heat exchanger in flowing of refrigerant in an operation in which the first heat exchanger functions as a condenser, and which performs switching between flow directions of the refrigerant. The apparatus further includes a refrigerant blocking mechanism located on an outlet side of the second refrigerant passage of the first heat exchanger in the flowing of the refrigerant in the operation, and which blocks the flowing of the refrigerant.Type: ApplicationFiled: July 29, 2016Publication date: May 16, 2019Inventors: Chitose TANAKA, Takuya MATSUDA, Kosuke TANAKA