Patents by Inventor Shinichi Wakamoto
Shinichi Wakamoto 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: 9657955Abstract: To obtain an air-conditioning apparatus that does not make a refrigerant circulate up to an indoor unit and further can achieve energy-saving. A refrigeration cycle is configured by connecting a compressor that pressurizes a refrigerant, a four-way valve that switches a circulation path of the refrigerant, a heat source side heat exchanger that performs heat exchange, expansion valves for pressure-adjusting the refrigerant, and a plurality of intermediate heat exchangers that performs heat exchange between the refrigerant and the heat medium to heat and cool the heat medium, with piping. A heat medium circuit is configured by connecting intermediate heat exchangers, pumps that pressurize the heat medium, and a plurality of use side heat exchangers that perform heat exchange between the heat medium and the air in the indoor space, with piping.Type: GrantFiled: October 29, 2008Date of Patent: May 23, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatomura, Naoki Tanaka, Shinichi Wakamoto, Takashi Okazaki, Yusuke Shimazu
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Patent number: 9638447Abstract: In an air-conditioning apparatus, a controller controls an amount of refrigerant injection into a compressor by controlling an opening area of an expansion device such that the electric power consumption of the compressor becomes smaller, or such that a heating capacity or a cooling capacity of an intermediate heat exchanger becomes larger.Type: GrantFiled: June 29, 2011Date of Patent: May 2, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Shinichi Wakamoto, Naofumi Takenaka, Kosuke Tanaka
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Patent number: 9618241Abstract: An air-conditioning apparatus controls that a discharge temperature does not become too high with a refrigerant whose compressor discharge temperature readily rises, and thus suppress degradation of the refrigerant and a refrigerating machine oil. An injection pipe that injects a heat source side refrigerant into a compressor is installed, connected a pipe between a backflow prevention device and an opening and closing device installed on a branching pipe, and an aperture unit in the compressor.Type: GrantFiled: January 31, 2011Date of Patent: April 11, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Katsuhiro Ishimura, Shinichi Wakamoto, Naofumi Takenaka
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Publication number: 20170082109Abstract: A posture control unit (contact portion 6f) that controls a posture of a balance weight-equipped slider 5 so that a slider portion 5a of the balance weight-equipped slider 5 maintains the posture parallel to an orbiting bearing 2d is provided at a position corresponding to a central portion in an axial direction of the orbiting bearing 2d between an eccentric direction-side side surface of an eccentric shaft portion 6a of a rotary shaft 6 and an inner wall surface of a slide hole 5aa facing the side surface.Type: ApplicationFiled: May 8, 2015Publication date: March 23, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Raito KAWAMURA, Shin SEKIYA, Shinichi WAKAMOTO, Mihoko SHIMOJI, Hideaki NAGATA
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Patent number: 9599378Abstract: A heat pump hot-water supply apparatus controls a second expansion device during a heating operation so as to adjust the amount of refrigerant flowing through an injection pipe, and controls a third expansion device during a cooling operation so as to adjust the amount of refrigerant flowing through the injection pipe.Type: GrantFiled: January 31, 2011Date of Patent: March 21, 2017Assignee: Mitsubishi Electric CorporationInventors: Koji Yamashita, Hiroyuki Morimoto, Katsuhiro Ishimura, Shinichi Wakamoto, Naofumi Takenaka
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Patent number: 9593872Abstract: A heat pump capable of operating in a high COP state even if influx temperature of a medium to be heated flowing into the radiators has increased. The heat pump includes a compressor, a first radiator, a second radiator, an expansion valve, and an evaporator sequentially connected by refrigerant piping to form a first refrigeration cycle, in which a first refrigerant circulates in the first refrigeration cycle, and in which the first radiator and the second radiator are serially connected. A first heat exchange unit that heats the first refrigerant is provided in a refrigerant piping at a refrigerant inlet side of the second radiator, and a second heat exchange unit that cools the first refrigerant is provided in a refrigerant piping at a refrigerant outlet side of the second radiator.Type: GrantFiled: October 27, 2009Date of Patent: March 14, 2017Assignee: Mitsubishi Electric CorporationInventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Hiroyuki Morimoto, Takeshi Hatomura, Yusuke Shimazu
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Patent number: 9587861Abstract: In an air-conditioning apparatus, an expansion device, a second refrigerant flow switching device, and heat exchangers related to heat medium, connected between the expansion device and the second refrigerant flow switching device such that a heat source side refrigerant flows in parallel, are connected in a part of refrigerant passages, and an expansion device, a second refrigerant flow switching device, and heat exchangers related to heat medium, connected between the expansion device and the second refrigerant flow switching device such that the heat source side refrigerant flows in series, are connected in the rest of the refrigerant passages.Type: GrantFiled: September 14, 2010Date of Patent: March 7, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Junichi Ue, Shinichi Wakamoto, Naofumi Takenaka
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Patent number: 9587843Abstract: A refrigeration cycle is configured by connecting a compressor, a four-way valve, a heat source side heat exchanger, expansion valves, and intermediate heat exchangers by piping. A heat medium circulation circuit is configured by connecting intermediate heat exchangers, pumps, and use side heat exchangers by piping. The outdoor unit accommodates the compressor, the four-way valve, and the heat source side heat exchanger, and the relay unit that is installed in a non-subject space which is different from an indoor space and is on an installation floor separated by two or more floors and accommodates the expansion valves, the pump, and intermediate heat exchangers are connected by two pipelines. The relay unit and an indoor unit that accommodates use side heat exchangers and is installed at a position where an indoor space can be air-conditioned are connected by two pipelines.Type: GrantFiled: October 29, 2008Date of Patent: March 7, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatomura, Naoki Tanaka, Shinichi Wakamoto, Takashi Okazaki, Yusuke Shimazu
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Patent number: 9534807Abstract: An air-conditioning apparatus has a controller that sets the target value of a difference between the temperatures of a secondary-side heat transfer medium at positions before and after a plurality of use side heat exchangers during a rated operation in a heating operation so as to have a larger magnitude than a target value of the difference between the temperatures of the secondary-side heat transfer medium at positions before and after the plurality of use side heat exchangers during a rated operation in the cooling operation.Type: GrantFiled: April 28, 2016Date of Patent: January 3, 2017Assignee: Mitsubishi Electric CorporationInventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Hiroyuki Morimoto, Yusuke Shimazu
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Patent number: 9523520Abstract: An air-conditioning apparatus uses R32, a refrigerant mixture containing R32 and HFO1234yf in which R32 has a mass percentage of 40% or higher, or a refrigerant mixture containing R32 and HFO1234ze in which R32 has a mass percentage of 15% or higher, as a heat-source refrigerant. The air-conditioning apparatus includes a low-pressure shell-structure compressor, a first flow switching valve, a heat-source-side heat exchanger, first flow control devices, and plural use-side heat exchangers connected by refrigerant pipes, forming a refrigeration cycle. The compressor includes a compression chamber within a sealed container including an opening extending between inside and outside of the sealed container. The air-conditioning apparatus can perform only a heating at the use-side heat exchangers, only a cooling at the use-side heat exchangers, and a mixed cooling and heating in a mixed fashion at the use-side heat exchangers.Type: GrantFiled: January 31, 2011Date of Patent: December 20, 2016Assignee: Mitsubishi Electric CorporationInventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Hiroyuki Morimoto, Katsuhiro Ishimura
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Patent number: 9518754Abstract: A first flow switching device causes part of a refrigerant discharged from an injection compressor to flow through a first bypass pipe and be supplied to an outdoor heat exchanger targeting for defrosting. A second flow switching device causes part of the refrigerant supplied to the outdoor heat exchanger targeting for defrosting to enter a second bypass pipe.Type: GrantFiled: January 24, 2012Date of Patent: December 13, 2016Assignee: Mitsubishi Electric CorporationInventors: Shinichi Wakamoto, Naofumi Takenaka, Koji Yamashita, Osamu Morimoto, Hirofumi Koge
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Patent number: 9494348Abstract: An air-conditioning apparatus controls an opening degree of at least one of a second expansion device and a third expansion device to adjust the amount of refrigerant to flow through the injection pipe.Type: GrantFiled: May 23, 2011Date of Patent: November 15, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiro Ishimura, Koji Yamashita, Hiroyuki Morimoto, Shinichi Wakamoto, Naofumi Takenaka
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Patent number: 9476618Abstract: An air-conditioning apparatus in which a heat source unit and a relay unit are connected by two pipings, and in which a hot water supply function can be readily added. The relay unit includes a connection circuit between a first branching unit and a second connecting piping that is capable of connecting a water heat exchanger that exchanges heat between a refrigerant and water.Type: GrantFiled: October 23, 2009Date of Patent: October 25, 2016Assignee: Mitsubishi Electric CorporationInventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Hiroyuki Morimoto, Yusuke Shimazu
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Publication number: 20160273795Abstract: An air-conditioning apparatus is capable of performing a heating-defrosting operation where a specific one of a plurality of parallel heat exchangers is a heat exchanger to be defrosted and serves as a condenser while at least one parallel heat exchanger other than the heat exchanger to be defrosted serves as an evaporator. The air-conditioning apparatus includes a liquid refrigerant transporting unit for transferring liquid refrigerant from an accumulator to the heat exchanger to be defrosted. To perform the heating-defrosting operation, the air-conditioning apparatus supplies, to the heat exchanger to be defrosted, the liquid refrigerant transferred by the liquid refrigerant transporting unit.Type: ApplicationFiled: May 1, 2014Publication date: September 22, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Naofumi TAKENAKA, Shinichi WAKAMOTO, Kazuya WATANABE, Koji YAMASHITA, Takeshi HATOMURA
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Patent number: 9441862Abstract: An air-conditioning apparatus in which a primary-side refrigerant in a two-phase gas-liquid state that has flowed into each of intermediate heat exchangers absorbs heat from a secondary-side refrigerant flowing in counterflow to the primary-side refrigerant, and evaporates and turns into a low-temperature, low-pressure gas state. The air-conditioning apparatus ensures high heat exchange efficiency even when a direction of a heat source-side refrigerant (secondary-side refrigerant) flowing through an intermediate heat exchanger changes, and enables an appropriate operation in any operation mode.Type: GrantFiled: January 23, 2012Date of Patent: September 13, 2016Assignee: Mitsubishi Electric CorporationInventors: Asako Tamura, Naofumi Takenaka, Shinichi Wakamoto, Susumu Yoshimura, Koji Yamashita
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Patent number: 9435549Abstract: To provide an air-conditioning apparatus which achieves improvement of safety and further achieves saving of energy without circulating a refrigerant in or near an indoor unit. The air-conditioning apparatus includes one expansion device disposed on an outlet side of a heat exchanger related to the heat medium on the heating side. Another expansion device is disposed on an inlet side of a heat exchanger related to the heat medium on the cooling side such that the expansion devices are directly connected through a connecting pipe.Type: GrantFiled: September 9, 2009Date of Patent: September 6, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Shinichi Wakamoto, Naofumi Takenaka
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Publication number: 20160245539Abstract: An air-conditioning apparatus includes a refrigerant circuit formed by connecting, with pipes, a compressor, a first refrigerant flow switching device, a heat-source-side heat exchanger, an expansion device, and a plurality of intermediate heat exchangers. A heat medium circuit is formed by connecting, with pipes, a plurality of pumps configured to pressurize and circulate the heat medium subjected to heat exchange in the plurality of intermediate heat exchangers, a plurality of use-side heat exchangers each configured to exchange heat between the heat medium and air in an air-conditioned space, and a heat-medium flow switching/control device configured to switch which of the heat medium is to be allowed to flow into and out of each of the use-side heat exchangers; and a controller configured to perform processing for controlling the switching performed by the heat-medium flow switching/control device, in accordance with a capacity of each of the use-side heat exchangers.Type: ApplicationFiled: December 19, 2013Publication date: August 25, 2016Inventors: Yuji MOTOMURA, Naofumi TAKENAKA, Shinichi WAKAMOTO, Hirofumi KOGE, Osamu MORIMOTO
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Publication number: 20160238273Abstract: An air-conditioning apparatus has a controller that sets the target value of a difference between the temperatures of a secondary-side heat transfer medium at positions before and after a plurality of use side heat exchangers during a rated operation in a heating operation so as to have a larger magnitude than a target value of the difference between the temperatures of the secondary-side heat transfer medium at positions before and after the plurality of use side heat exchangers during a rated operation in the cooling operation.Type: ApplicationFiled: April 28, 2016Publication date: August 18, 2016Applicant: Mitsubishi Electric CorporationInventors: Naofumi TAKENAKA, Shinichi WAKAMOTO, Koji YAMASHITA, Hiroyuki MORIMOTO, Yusuke SHIMAZU
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Patent number: 9366452Abstract: An air-conditioning apparatus capable of achieving enhancement of the system COP while suppressing product cost. The air-conditioning apparatus controls the difference between the temperatures of brine at a position before and at a position after an indoor heat exchanger or at a position before and at a position after an intermediate heat exchanger to be a preset target value and to be larger at the time of a heating operation than at the time of a cooling operation.Type: GrantFiled: July 10, 2009Date of Patent: June 14, 2016Assignee: Mitsubishi Electric CorporationInventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Hiroyuki Morimoto, Yusuke Shimazu
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Patent number: 9353979Abstract: An air-conditioning apparatus in which entry of a refrigerant into a living space is suppressed and measures against refrigerant leakage are taken is provided.Type: GrantFiled: October 29, 2008Date of Patent: May 31, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroyuki Morimoto, Kouji Yamashita, Takeshi Hatomura, Shinichi Wakamoto, Naofumi Takenaka, Yusuke Shimazu