Patents by Inventor Tomokazu Kawagoe
Tomokazu Kawagoe 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: 10451324Abstract: An air-conditioning apparatus includes two heat source units, each including a compressor, an outdoor heat exchanger functioning as an evaporator, an accumulator connected to a suction side of the compressor, and at least one of an outdoor air-sending device configured to supply air corresponding to a heat exchange target for refrigerant to the outdoor heat exchanger or a flow control device (bypass and expansion device for bypass) configured to regulate a flow rate of the refrigerant flowing through the outdoor heat exchanger. A controller is configured to control at least one of the outdoor air-sending device or the flow control device so that a suction quality of the compressor of an upper heat source unit installed on an upper side and a suction quality of the compressor of a lower heat source unit installed on a lower side become the same.Type: GrantFiled: May 30, 2014Date of Patent: October 22, 2019Assignee: Mitsubishi Electric CorporationInventors: Tomokazu Kawagoe, Koji Azuma, Kosuke Tanaka
-
Patent number: 10088198Abstract: An air-conditioning and hot water supplying composite system includes a heat source unit and a heat source-side heat exchanger, an indoor heat source unit, a hot water supply unit connected to the heat source unit and including a hot water supply-side heat exchanger and a hot water supply-side expansion device, and a controller that controls the heat source unit. The controller includes a mode switching unit that switches a control mode of the air-conditioning and hot water supplying composite system between a hot water supply control mode, a hot water supply preheating mode, and a condensing temperature control unit. The condensing temperature control unit determines the target condensing temperature according to a temperature of a heat medium subjected to heat exchange by the hot water supply unit, in the hot water supply control mode.Type: GrantFiled: November 27, 2014Date of Patent: October 2, 2018Assignee: Mitsubishi Electric CorporationInventors: Tomokazu Kawagoe, Hirofumi Koge, Osamu Morimoto
-
Publication number: 20170234576Abstract: An air-conditioning and hot water supplying composite system includes a heat source unit and a heat source-side heat exchanger, an indoor heat source unit, a hot water supply unit connected to the heat source unit and including a hot water supply-side heat exchanger and a hot water supply-side expansion device, and a controller that controls the heat source unit. The controller includes a mode switching unit that switches a control mode of the air-conditioning and hot water supplying composite system between a hot water supply control mode, a hot water supply preheating mode, and a condensing temperature control unit. The condensing temperature control unit determines the target condensing temperature according to a temperature of a heat medium subjected to heat exchange by the hot water supply unit, in the hot water supply control mode.Type: ApplicationFiled: November 27, 2014Publication date: August 17, 2017Inventors: Tomokazu KAWAGOE, Hirofumi KOGE, Osamu MORIMOTO
-
Patent number: 9644872Abstract: The refrigerant discharged from a compressor is distributed based on the priorities set by the user in advance and the remaining refrigerant is further distributed based on the priorities. Thus, setting the priorities for indoor units according, for example, to the usage of work spaces and the like in an office building, the user can operate a heat pump system efficiently in accordance with the intended use. Furthermore, the remaining capacity of the outdoor unit is distribute to the remaining indoor units according to their priorities so that the indoor units are operated efficiently within the range of the cooling capacity of the outdoor unit.Type: GrantFiled: October 24, 2011Date of Patent: May 9, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kosuke Tanaka, Hirofumi Koge, Tomokazu Kawagoe
-
Patent number: 9625187Abstract: A combined air-conditioning and hot-water supply system that, if a temperature that is set in a hot-water supply unit is higher than a temperature of refrigerant discharged from a compressor when the combined air-conditioning and hot-water supply system is in a heating operation cycle state, increases a target condensing temperature of an outdoor unit above the target condensing temperature that has been set, and controls an opening degree of an indoor expansion device to be less than the opening degree that has been set, such that a heating load of an indoor unit is maintained constant.Type: GrantFiled: December 15, 2010Date of Patent: April 18, 2017Assignee: Mitsubishi Electric CorporationInventors: Tomokazu Kawagoe, Hirofumi Koge
-
Publication number: 20170082334Abstract: An air-conditioning apparatus includes two heat source units, each including a compressor, an outdoor heat exchanger functioning as an evaporator, an accumulator connected to a suction side of the compressor, and at least one of an outdoor air-sending device configured to supply air corresponding to a heat exchange target for refrigerant to the outdoor heat exchanger or a flow control device (bypass and expansion device for bypass) configured to regulate a flow rate of the refrigerant flowing through the outdoor heat exchanger. A controller is configured to control at least one of the outdoor air-sending device or the flow control device so that a suction quality of the compressor of an upper heat source unit installed on an upper side and a suction quality of the compressor of a lower heat source unit installed on a lower side become the same.Type: ApplicationFiled: May 30, 2014Publication date: March 23, 2017Inventors: Tomokazu KAWAGOE, Koji AZUMA, Kosuke TANAKA
-
Patent number: 9528713Abstract: A combined hot water supply and air-conditioning device heat source even in a case where the outside air temperature is high such as in summertime. In heating operation, a combined hot water supply and air-conditioning device controls the capacity of a heat source unit-side heat exchanger equipped to a heat source unit to thereby achieve a balance between the load of the heat source unit, and the total load of indoor units and a hot water supply unit.Type: GrantFiled: December 22, 2010Date of Patent: December 27, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hirofumi Koge, Tomokazu Kawagoe
-
Patent number: 9279608Abstract: A first bypass pipe has one end connected to a main pipe extending from a compressor to an indoor heat exchanger, and its other end branched off into parts that are each connected to the main pipe on an inlet side of an outdoor heat exchanger, and a second bypass pipe has one end connected to an injection port communicating with the compression chamber of the compressor in which compression is taking place and its other end branched off into parts that are each connected to the main pipe on an outlet side of the outdoor heat exchangers. During a defrosting operation that removes frost on the outdoor heat exchangers, a part of the refrigerant discharged from the compressor is supplied from the first bypass pipe to the outdoor heat exchanger to be defrosted, and is then passed through the second bypass pipe and injected from the injection port of the compressor.Type: GrantFiled: January 18, 2011Date of Patent: March 8, 2016Assignee: Mitsubishi Electric CorporationInventors: Shinichi Wakamoto, Naofumi Takenaka, Osamu Morimoto, Hirofumi Koge, Kazuyoshi Shinozaki, Tomokazu Kawagoe
-
Patent number: 9080778Abstract: Provided is an air-conditioning hot-water supply combined system configured such that, in the case where all of load side units perform a cooling operation and a hot water load (heating load) is low during a cooling and heating mixed operation in a cooling cycle, an input of an air conditioning refrigerant block is reduced to increase the COP of the system. An air-conditioning hot-water supply combined system A reduces a target condensing temperature in a heat source unit in the case where a heating load in load side units and a hot water load in a hot water unit are less than a predetermined reference value in a cooling operation cycle state.Type: GrantFiled: January 22, 2010Date of Patent: July 14, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomokazu Kawagoe, Koji Azuma, Hirofumi Koge
-
Publication number: 20150128628Abstract: An air-conditioning apparatus includes a heat source-side unit including a compressor that compresses a refrigerant and a heat source-side heat exchanger, a plurality of use-side units each including a use-side heat exchanger, and a plurality of intermediate heat exchangers connected to the heat source-side unit and to the use-side units. A target determination device detects condensation status of each of the use-side units and determines whether to perform condensation suppression control. The use-side unit determined by the target determination means to be subjected to the condensation suppression control is connected to an intermediate heat exchanger for adjustment. A refrigerant circuit control device controls a temperature of the refrigerant flowing into the intermediate heat exchanger for adjustment so that the heat medium temperature T of the heat medium flowing into at least one use-side unit enters a predetermined target set temperature range.Type: ApplicationFiled: July 24, 2012Publication date: May 14, 2015Applicant: Mitsubishi Electric CorporationInventors: Tomokazu Kawagoe, Daisuke Shimamoto, Koji Azuma, Takayoshi Honda
-
Publication number: 20140297057Abstract: The refrigerant discharged from a compressor is distributed based on the priorities set by the user in advance and the remaining refrigerant is further distributed based on the priorities. Thus, setting the priorities for indoor units according, for example, to the usage of work spaces and the like in an office building, the user can operate a heat pump system efficiently in accordance with the intended use. Furthermore, the remaining capacity of the outdoor unit is distribute to the remaining indoor units according to their priorities so that the indoor units are operated efficiently within the range of the cooling capacity of the outdoor unit.Type: ApplicationFiled: October 24, 2011Publication date: October 2, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kosuke Tanaka, Hirofumi Koge, Tomokazu Kawagoe
-
Publication number: 20130219945Abstract: A combined hot water supply and air-conditioning device supplies heat source even in a case where the outside air temperature is high such as in summertime. In heating operation, a combined hot water supply and air-conditioning device controls the capacity of a heat source unit-side heat exchanger equipped to a heat source unit to thereby achieve a balance between the load of the heat source unit, and the total load of indoor units and a hot water supply unit.Type: ApplicationFiled: December 22, 2010Publication date: August 29, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hirofumi Koge, Tomokazu Kawagoe
-
Publication number: 20130213072Abstract: A combined air-conditioning and hot-water supply system that, if a temperature that is set in a hot-water supply unit is higher than a temperature of refrigerant discharged from a compressor when the combined air-conditioning and hot-water supply system is in a heating operation cycle state, increases a target condensing temperature of an outdoor unit above the target condensing temperature that has been set, and controls an opening degree of an indoor expansion device to be less than the opening degree that has been set, such that a heating load of an indoor unit is maintained constant.Type: ApplicationFiled: December 15, 2010Publication date: August 22, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomokazu Kawagoe, Hirofumi Koge
-
Publication number: 20130098092Abstract: A first bypass pipe has one end connected to a main pipe extending from a compressor to an indoor heat exchanger, and its other end branched off into parts that are each connected to the main pipe on an inlet side of an outdoor heat exchanger, and a second bypass pipe has one end connected to an injection port communicating with the compression chamber of the compressor in which compression is taking place and its other end branched off into parts that are each connected to the main pipe on an outlet side of the outdoor heat exchangers. During a defrosting operation that removes frost on the outdoor heat exchangers, a part of the refrigerant discharged from the compressor is supplied from the first bypass pipe to the outdoor heat exchanger to be defrosted, and is then passed through the second bypass pipe and injected from the injection port of the compressor.Type: ApplicationFiled: January 18, 2011Publication date: April 25, 2013Applicant: Mitsubishi Electric CorporationInventors: Shinichi Wakamoto, Naofumi Takenaka, Osamu Morimoto, Hirofumi Koge, Kazuyoshi Shinozaki, Tomokazu Kawagoe
-
Publication number: 20130014525Abstract: A switching device or the like efficiently performs operations such as the cutting off of a refrigerant and is easy to maintain, design, and manufacture at low cost even if the switching device is included in, for example, an air-conditioning apparatus including a plurality of indoor units. A plurality of shut-off valves for individually stopping the flow of a refrigerant are provided in a plurality of pipes for making a refrigerant circulate between a heat source unit and a plurality of indoor units. The shut-off valves are integrated into pairs. A number of pairs of the shut-off valves corresponding to the number of indoor units are grouped together.Type: ApplicationFiled: May 12, 2010Publication date: January 17, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hirofumi Koge, Tomokazu Kawagoe, Koji Azuma
-
Publication number: 20120255320Abstract: Provided is an air-conditioning hot-water supply combined system configured such that, in the case where all of load side units perform a cooling operation and a hot water load (heating load) is low during a cooling and heating mixed operation in a cooling cycle, an input of an air conditioning refrigerant block is reduced to increase the COP of the system. An air-conditioning hot-water supply combined system A reduces a target condensing temperature in a heat source unit in the case where a heating load in load side units and a hot water load in a hot water unit are less than a predetermined reference value in a cooling operation cycle state.Type: ApplicationFiled: January 22, 2010Publication date: October 11, 2012Applicant: Mitsubishi Electric CorporationInventors: Tomokazu Kawagoe, Koji Azuma, Hirofumi Koge
-
Publication number: 20110023512Abstract: To obtain an air conditioner which ensures safe operation and protection of the device and can carry out an operation with favorable energy efficiency by efficiently compressing the refrigerant. The air conditioner 100 is capable of performing a cooling/heating mixed operation, constituting a refrigerant circuit by piping connection of a heat-source side unit 10 having a heat-source side heat exchanger 15 and a compressor 11, a plurality of load-side units 50 having a load-side throttle device 51 and a load-side heat exchanger 52, and a cooling/heating branch unit 30 having a gas/liquid separator 31.Type: ApplicationFiled: August 28, 2007Publication date: February 3, 2011Applicant: Mitsubishi Electric CorporationInventors: Tomokazu Kawagoe, Kazuyoshi Shinozaki, Hirofumi Koge
-
Patent number: D874625Type: GrantFiled: July 21, 2017Date of Patent: February 4, 2020Assignee: Mitsubishi Electric CorporationInventors: Hiroki Takahashi, Tomokazu Kawagoe, Koji Azuma
-
Patent number: D875227Type: GrantFiled: July 21, 2017Date of Patent: February 11, 2020Assignee: Mitsubishi Electric CorporationInventors: Hiroki Takahashi, Tomokazu Kawagoe, Koji Azuma