Patents by Inventor Yusuke Shimazu
Yusuke Shimazu 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: 20120060551Abstract: Energy saving of a refrigerating cycle device is achieved by equalizing heat-medium inlet temperatures of a plurality of use-side heat exchangers.Type: ApplicationFiled: May 29, 2009Publication date: March 15, 2012Applicant: Mitsubishi Electric CorporationInventors: Keisuke Takayama, Yusuke Shimazu
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Publication number: 20120043054Abstract: In a first cycle, a first heat exchanger, in which a first medium exchanges heat with the outside air, a second heat exchanger and a third heat exchanger, in which heat is exchanged between the first cycle and a second cycle and between the first cycle and a third cycle, respectively, are connected in series with a first reducing valve and a second reducing valve. In the second cycle and the third cycle that convey cooling energy and heating energy, the flow rates of a second medium in respective branches are adjusted by flow-rate-adjusting valves in accordance with the entrance and exit temperatures of indoor units, and the total flow rate is determined by controlling the rotation speed of a pump by a minimum resistance method. Therefore, even if there are a plurality of loads and the loads change significantly, a stable controlling operation is realized, enabling a highly efficient operation.Type: ApplicationFiled: May 13, 2009Publication date: February 23, 2012Applicant: Mitsubishi Electric CorporationInventors: Yusuke Shimazu, Keisuke Takayama, Koji Yamashita, Hiroyuki Morimoto, Shinichi Wakamoto
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Publication number: 20120043056Abstract: A first cycle, in which a first medium is circulated, employs a compressor, a first heat exchanger structured with an air heat exchanger, a second heat exchanger, and a third heat exchanger. A second cycle, in which a second medium is circulated and heat is exchanged with the first medium through the second heat exchanger, employs indoor units, each having a fan. A third cycle, in which the second medium is circulated and heat is exchanged with the first medium through the third heat exchanger, shares the indoor units with the second cycle. Flow path switching valves switch flow paths between the second cycle and third cycle. Before the first heat exchanger is defrosted, a halted indoor unit is filled with the second medium in the third cycle with its fan being halted. The third heat exchanger functions as an evaporator during a defrosting operation.Type: ApplicationFiled: May 8, 2009Publication date: February 23, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yusuke Shimazu, Keisuke Takayama, Koji Yamashita, Hiroyuki Morimoto, Shinichi Wakamoto
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Publication number: 20120042674Abstract: 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: ApplicationFiled: July 10, 2009Publication date: February 23, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Naofumi Takenaka, Shinichi Wakamoto, Koji Yamashita, Hiroyuki Morimoto, Yusuke Shimazu
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Publication number: 20120036887Abstract: A multi-chamber type air-conditioning apparatus is provided in which a refrigerant whose effect on human bodies is a concern is prevented from leaking into a room or the like in which an indoor unit is installed, simultaneous operation of cooling and heating is possible, and performance deterioration by a refrigerant flow control device or drop of the cooling capacity of the indoor unit can be prevented.Type: ApplicationFiled: May 8, 2009Publication date: February 16, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shinichi Wakamoto, Koji Yamashita, Naofumi Takenaka, Yusuke Shimazu
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Publication number: 20120031605Abstract: There are provided a plurality of use-side heat exchangers, inter-heat-medium heat exchangers, heat medium flow path switching devices, which switch flow paths, and pumps, which feed heat media to these paths; the inter-heat-medium heat exchangers heat or cool a heat medium by exchanging heat between the heat medium and a heat source fluid fed from a heat source apparatus. About half of the plurality of use-side heat exchangers are preheated or precooled, and the remaining use-side heat exchangers which are not preheated or precooled exchange heat media with use-side heat exchangers that have been preheated or precooled and that are not yet started to operate, suppressing energy consumed for preheating or precooling.Type: ApplicationFiled: May 8, 2009Publication date: February 9, 2012Applicant: Mitsubishi Electric CorporationInventors: Keisuke Takayama, Yusuke Shimazu
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Publication number: 20120006050Abstract: Use side heat exchangers, an intermediate heat exchanger that heats a heat medium flowing to the use side heat exchangers, an intermediate heat exchanger that cools the heat medium flowing to the use side heat exchangers, three-way valves that switch between a flow path connecting the intermediate heat exchanger to the use side heat exchangers and a flow path connecting the intermediate heat exchanger to the use side heat exchangers, and three-way valves and bypasses that control the flow rate of the heat medium flowing into the use side heat exchangers are included. When at least one of the use side heat exchangers is switched from a stop state to an operation state or switched to another operation mode, the flow rate of the heat medium flowing into this use side heat exchanger is suppressed, and a change in air output temperature in the use side heat exchangers other than this use side heat exchanger is suppressed.Type: ApplicationFiled: April 1, 2009Publication date: January 12, 2012Applicant: Mitsubishi Electric CorporationInventors: Keisuke Takayama, Koji Yamashita, Hiroyuki Morimoto, Yusuke Shimazu
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Publication number: 20110225998Abstract: 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: ApplicationFiled: October 29, 2008Publication date: September 22, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatomura, Naoki Tanaka, Shinichi Wakamoto, Takashi Okazaki, Yusuke Shimazu
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Publication number: 20110197608Abstract: A refrigeration cycle is configured by connecting a compressor that compresses the refrigerant, a four-way valve that switches the circulation path of the refrigerant, a heat source side heat exchanger that exchanges heat, expansion valves that adjust the pressure of the refrigerant, and two or more intermediate heat exchangers that exchange heat between the refrigerant and the heat medium to heat and cool the heat medium, by piping. A heat medium circulation circuit is configured by connecting two or more intermediate heat exchangers, pumps that pressurize the heat medium, two or more use side heat exchangers that exchange heat between the heat medium and the air in the indoor space, and flow path switching valves that switch paths of the heated heat medium or the cooled heat medium to the use side heat exchangers, by piping.Type: ApplicationFiled: October 29, 2008Publication date: August 18, 2011Applicant: MITSUBISHI ELECTRIC CORPORTIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatmoura, Naoki Tanaka, Shinichi Wakamoto, Takashi Okazaki, Yusuke Shimazu
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Publication number: 20110192189Abstract: 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: ApplicationFiled: October 29, 2008Publication date: August 11, 2011Applicant: Mitsubishi Electric CorporationInventors: Hiroyuki Morimoto, Kouji Yamashita, Takeshi Hatomura, Shinichi Wakamoto, Naofumi Takenaka, Yusuke Shimazu
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Publication number: 20110192184Abstract: To obtain an air-conditioner apparatus that can achieve energy-saving without making refrigerant circulate up to an indoor unit and whose construction work is easy. 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 that is installed in a space such as outdoors of the building and 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 a installation floor separated by two or more floors and accommodates the expansion valves, the pump, and intermediate heat exchangers are connected by two pipelines.Type: ApplicationFiled: October 29, 2008Publication date: August 11, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji Yamashita, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatomura, Naoki Tanaka, Shinichi Wakamoto, Takashi Okazaki, Yusuke Shimazu
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Publication number: 20110167865Abstract: An air-conditioning apparatus in which a labor required for system selection is simplified is provided.Type: ApplicationFiled: October 29, 2008Publication date: July 14, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroyuki Morimoto, Kouji Yamashita, Takeshi Hatomura, Shinichi Wakamoto, Naofumi Takenaka, Yusuke Shimazu
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Publication number: 20110138835Abstract: To provide a refrigerating cycle apparatus capable of improving cooling ability by water spray to perform an efficient operation while suppressing decrease in collected power by an expander. The refrigerating cycle apparatus includes: a first compressor that compresses the refrigerant; an expander that decompresses and expands the refrigerant to collect power for expansion; a second compressor that is driven by the power collected by the expander to further compresses the refrigerant compressed by the first compressor to transmit it to a main radiator; a heat exchanger having an intercooler that cools the refrigerant compressed by the first compressor and a main radiator that cools the refrigerant compressed by the second heat exchanger to transmit it to the expander; indoor heat exchangers that heat the refrigerant decompressed by the expander; and a water spray apparatus that sprays water onto the outer surface of the intercooler and the main radiator.Type: ApplicationFiled: March 13, 2009Publication date: June 16, 2011Applicant: Mitsubishi Electric CorporationInventors: Keisuke Takayama, Yusuke Shimazu
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Publication number: 20110088421Abstract: A heat source-side refrigerant circuit A including a compressor 11, an outdoor heat exchanger 13, a first refrigerant branch portion 21 connected to the compressor 11, a second refrigerant branch portion 22 and a third refrigerant branch portion 23 connected to the outdoor heat exchanger 13, a first refrigerant flow rate control device 24 provided between branch piping 40 and the second refrigerant branch portion 22, intermediate heat exchangers 25n connected at one side thereof to the first refrigerant branch portion 21 and the third refrigerant branch portion 23 via three-way valves 26n and connected at the other side thereof to the second refrigerant branch portion 22, and second refrigerant flow rate control devices 27n provided between the respective intermediate heat exchangers 25n and the second refrigerant branch portion 22, and user-side refrigerant circuits Bn having indoor heat exchangers 31n connected respectively to the intermediate heat exchangers 25n are provided, and at least one of water andType: ApplicationFiled: October 29, 2008Publication date: April 21, 2011Applicant: Mitsubishi Electric CorporationInventors: Shinichi Wakamoto, Koji Yamashita, Takashi Okazaki, Naoki Tanaka, Keisuke Hokazono, Hiroyuki Morimoto, Yuji Motomura, Takeshi Hatomura, Tomohiko Kasai, Naofumi Takenaka, Yusuke Shimazu
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Publication number: 20110023533Abstract: Provided is a refrigerating cycle apparatus in which, even if large power is required to start up an expander, the expander may be started up by activating a compressor. An air conditioner including a first compressor for compressing a refrigerant, an outdoor heat exchanger for radiating heat of the refrigerant compressed by the first compressor, an expander for decompressing the refrigerant that has passed through the outdoor heat exchanger, an indoor heat exchanger in which the refrigerant decompressed by the expander is evaporated, and a drive shaft for recovering power that is generated when the refrigerant is decompressed by the expander includes an on-off valve which is provided between the expander and the indoor heat exchanger and controls movement of the refrigerant from the expander to the indoor heat exchanger.Type: ApplicationFiled: March 31, 2009Publication date: February 3, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Yusuke Shimazu