Patents by Inventor Yoshinori Narikawa
Yoshinori Narikawa 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: 11473791Abstract: Disclosed is a humidity control apparatus which ensures a sufficient dehumidification amount without increasing an area of a gas-liquid contact portion in a dehumidification unit, regardless of the type of liquid absorbent used. The humidity control apparatus includes an absorbent circuit connecting a liquid-based dehumidification module, a recovery module, and a liquid-cooling heat exchanger which cools, with a refrigerant, a liquid absorbent before being used in the liquid-based dehumidification module. A refrigerant-cooling-based dehumidification module is positioned upstream of the liquid-based dehumidification module in a flow direction of target air, and cools and dehumidifies, with the refrigerant, the target air before being dehumidified in the module. The liquid-cooling heat exchanger and the refrigerant-cooling-based dehumidification module are connected to a single refrigerant circuit together with a liquid-heating heat exchanger.Type: GrantFiled: January 26, 2018Date of Patent: October 18, 2022Assignee: DAIKIN INDUSTRIES, LTDInventors: Naotoshi Fujita, Eisaku Okubo, Nobuki Matsui, Yoshinori Narikawa
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Publication number: 20190309964Abstract: Disclosed is a humidity control apparatus which ensures a sufficient dehumidification amount without increasing an area of a gas-liquid contact portion in a dehumidification unit, regardless of the type of liquid absorbent used. The humidity control apparatus includes an absorbent circuit connecting a liquid-based dehumidification module, a recovery module, and a liquid-cooling heat exchanger which cools, with a refrigerant, a liquid absorbent before being used in the liquid-based dehumidification module. A refrigerant-cooling-based dehumidification module is positioned upstream of the liquid-based dehumidification module in a flow direction of target air, and cools and dehumidifies, with the refrigerant, the target air before being dehumidified in the module. The liquid-cooling heat exchanger and the refrigerant-cooling-based dehumidification module are connected to a single refrigerant circuit together with a liquid-heating heat exchanger.Type: ApplicationFiled: January 26, 2018Publication date: October 10, 2019Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Naotoshi FUJITA, Eisaku OKUBO, Nobuki MATSUI, Yoshinori NARIKAWA
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Patent number: 9200812Abstract: Adsorption heat exchangers (51, 52) are connected to a refrigerant circuit (50). The adsorption heat exchangers (51, 52) can be removed from the refrigerant circuit (50) via a plurality of joint members (64, 65, 66, 67). The adsorption heat exchangers (51, 52), removed from the refrigerant circuit (50), are pulled out to the outside of a casing (11) through maintenance openings (14a, 73a) of the casing (11).Type: GrantFiled: October 23, 2008Date of Patent: December 1, 2015Assignee: Daikin Industries, Ltd.Inventors: Yoshinori Narikawa, Takahiro Yukino
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Patent number: 8827169Abstract: A plurality of humidity control chambers are provided in a casing. An open/close damper is provided for each of a plurality of air flow ports communicating with the humidity control chambers. Adjacent dampers of the plurality of dampers are separably coupled together by a coupling member.Type: GrantFiled: August 18, 2008Date of Patent: September 9, 2014Assignee: Daikin Industries, Ltd.Inventor: Yoshinori Narikawa
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Patent number: 8276892Abstract: According to a humidity controller (10), a first heat exchanger chamber (37) and a second heat exchanger chamber (38) are arranged next to each other in the left-to-right direction in the casing (11). A first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37), and a second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38). The humidity controller (10) alternately performs an operation in which outdoor air passes through the first adsorption heat exchanger (51) and room air passes through the second adsorption heat exchanger (52), and an operation in which outdoor air passes through the second adsorption heat exchanger (52) and room air passes through the first adsorption heat exchanger (51).Type: GrantFiled: June 3, 2008Date of Patent: October 2, 2012Assignee: Daikin Industries, Ltd.Inventors: Yoshinori Narikawa, Shuji Ikegami, Nobuki Matsui
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Patent number: 8047014Abstract: A humidity control system (10) is disclosed which includes a refrigerant circuit (60). The refrigerant circuit (60) includes first and second absorbent-supported heat exchangers (61, 62) and performs a refrigeration cycle by the circulation of refrigerant. In addition, in the refrigerant circuit (60), the circulation direction of refrigerant is reversible. The first and second heat exchangers (61, 62) are disposed in a casing (11). In the humidity control system (10), the distribution route of air is changed such that a first air stream is passed through either one of the first and second heat exchangers (61, 61) that is functioning as an evaporator while a second air stream is passed through the other heat exchanger that is functioning as a condenser. A compressor (63), an expansion mechanism (65), and a four-way valve (64) in the refrigerant circuit (60) are disposed together with the heat exchangers (61, 62) in the casing (11).Type: GrantFiled: March 30, 2005Date of Patent: November 1, 2011Assignee: Daikin Industries, Ltd.Inventors: Tomohiro Yabu, Shuji Ikegami, Yoshinori Narikawa
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Publication number: 20110057045Abstract: A plurality of humidity control chambers are provided in a casing. An open/close damper is provided for each of a plurality of air flow ports communicating with the humidity control chambers. Adjacent dampers of the plurality of dampers are separably coupled together by a coupling member.Type: ApplicationFiled: August 18, 2008Publication date: March 10, 2011Inventor: Yoshinori Narikawa
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Patent number: 7895856Abstract: In a casing (11) of a humidity controller (10), a first heat exchanger chamber (37) which accommodates a first adsorption heat exchanger (51), and a second heat exchanger chamber (38) which accommodates a second adsorption heat exchanger (52) are arranged next to each other in the left-to-right direction. An indoor air side passage (32) and an outdoor air side passage (34) are provided on the rear panel portion (13) side of the heat exchanger chambers (37, 38), and a supply side passage (31) and exhaust side passage (33) are provided on the front panel portion (12) side of the heat exchanger chambers (37, 38). The rear panel portion (13) is provided with an outdoor air intake opening (24) and an indoor air intake opening (23) at locations close to a center of the rear panel portion (13) in the left-to-right direction.Type: GrantFiled: June 3, 2008Date of Patent: March 1, 2011Assignee: Daikin Industries, Ltd.Inventors: Yoshinori Narikawa, Shuji Ikegami, Nobuki Matsui
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Patent number: 7886551Abstract: A humidity control system (10) includes a refrigerant circuit (50) including a compressor (53), a first adsorption heat exchanger (51) carrying an adsorbent thereon, an expansion valve (55) adjustable in opening and a second adsorption heat exchanger (52) carrying an adsorbent thereon, supplies humidity-controlled air to a room by operating alternately in a first batch mode in which the second adsorption heat exchanger (52) adsorbs moisture in air and the first adsorption heat exchanger (51) releases moisture to air and a second batch mode in which the first adsorption heat exchanger (51) adsorbs moisture in air and the second adsorption heat exchanger (52) releases moisture to air, and controls the opening of the expansion valve (55), when a valve control start time has come a predetermined time after the start of each batch mode, so that the degree of superheat of refrigerant in the refrigerant circuit (50) reaches a predetermined value.Type: GrantFiled: May 30, 2006Date of Patent: February 15, 2011Assignee: Daikin Industries, Ltd.Inventors: Nobuki Matsui, Yoshinori Narikawa
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Publication number: 20100243748Abstract: A casing includes a first air passage in which outdoor air flows, and a second air passage in which room air flows divided by a divider plate. In each of the air passages, a humidity sensor is arranged on one of passage surfaces facing the air passage except for a surface of the divider plate.Type: ApplicationFiled: August 18, 2008Publication date: September 30, 2010Inventors: Yoshinori Narikawa, Takahiro Yukino
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Publication number: 20100242521Abstract: Adsorption heat exchangers (51, 52) are connected to a refrigerant circuit (50). The adsorption heat exchangers (51, 52) can be removed from the refrigerant circuit (50) via a plurality of joint members (64, 65, 66, 67). The adsorption heat exchangers (51, 52), removed from the refrigerant circuit (50), are pulled out to the outside of a casing (11) through maintenance openings (14a, 73a) of the casing (11).Type: ApplicationFiled: October 23, 2008Publication date: September 30, 2010Inventors: Yoshinori Narikawa, Takahiro Yukino
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Publication number: 20100181690Abstract: According to a humidity controller (10), a first heat exchanger chamber (37) and a second heat exchanger chamber (38) are arranged next to each other in the left-to-right direction in the casing (11). A first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37), and a second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38). The humidity controller (10) alternately performs an operation in which outdoor air passes through the first adsorption heat exchanger (51) and room air passes through the second adsorption heat exchanger (52), and an operation in which outdoor air passes through the second adsorption heat exchanger (52) and room air passes through the first adsorption heat exchanger (51).Type: ApplicationFiled: June 3, 2008Publication date: July 22, 2010Inventors: Yoshinori Narikawa, Shuji Ikegami, Nobuki Matsui
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Publication number: 20100170292Abstract: In a casing (11) of a humidity controller (10), a first heat exchanger chamber (37) which accommodates a first adsorption heat exchanger (51), and a second heat exchanger chamber (38) which accommodates a second adsorption heat exchanger (52) are arranged next to each other in the left-to-right direction. An indoor air side passage (32) and an outdoor air side passage (34) are provided on the rear panel portion (13) side of the heat exchanger chambers (37, 38), and a supply side passage (31) and exhaust side passage (33) are provided on the front panel portion (12) side of the heat exchanger chambers (37, 38). The rear panel portion (13) is provided with an outdoor air intake opening (24) and an indoor air intake opening (23) at locations close to a center of the rear panel portion (13) in the left-to-right direction.Type: ApplicationFiled: June 3, 2008Publication date: July 8, 2010Inventors: Yoshinori Narikawa, Shuji Ikegami, Nobuki Matsui
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Publication number: 20100170280Abstract: In the casing (11) of a humidity controller (10), a first bypass passage (81) is provided along one of side plates facing each other, and a second bypass passage (82) is provided along the other side plate. In the casing (11), a first heat exchanger chamber (37) and a second heat exchanger chamber (38) are arranged next to each other in the left-to-right direction in a space between the two bypass passages (81, 82). A first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37), and a second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38). Adsorbents are carried on the adsorption heat exchangers (51, 52). During the operation in which humidity of the air is not controlled, a first bypass damper (83) and a second bypass damper (84) are opened, and the air flows through the bypass passages (81, 82) to be drawn into a supply fan (26) or a exhaust fan (25).Type: ApplicationFiled: June 3, 2008Publication date: July 8, 2010Inventors: Yoshinori Narikawa, Nobuki Matsui
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Publication number: 20090230203Abstract: A humidity control system (10) includes a refrigerant circuit (50) including a compressor (53), a first adsorption heat exchanger (51) carrying an adsorbent thereon, an expansion valve (55) adjustable in opening and a second adsorption heat exchanger (52) carrying an adsorbent thereon, supplies humidity-controlled air to a room by operating alternately in a first batch mode in which the second adsorption heat exchanger (52) adsorbs moisture in air and the first adsorption heat exchanger (51) releases moisture to air and a second batch mode in which the first adsorption heat exchanger (51) adsorbs moisture in air and the second adsorption heat exchanger (52) releases moisture to air, controls the opening of the expansion valve (55), sets, upon start of the first batch mode, the opening of the expansion valve (55) to that at the end of the preceding first batch mode and sets, upon start of the second batch mode, the opening of the expansion valve (55) to that at the end of the preceding second batch mode.Type: ApplicationFiled: May 30, 2006Publication date: September 17, 2009Inventors: Nobuki Matsui, Yoshinori Narikawa
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Publication number: 20090084121Abstract: A humidity control system (10) includes a refrigerant circuit (50) including a compressor (53), a first adsorption heat exchanger (51) carrying an adsorbent thereon, an expansion valve (55) adjustable in opening and a second adsorption heat exchanger (52) carrying an adsorbent thereon, supplies humidity-controlled air to a room by operating alternately in a first batch mode in which the second adsorption heat exchanger (52) adsorbs moisture in air and the first adsorption heat exchanger (51) releases moisture to air and a second batch mode in which the first adsorption heat exchanger (51) adsorbs moisture in air and the second adsorption heat exchanger (52) releases moisture to air, and controls the opening of the expansion valve (55), when a valve control start time has come a predetermined time after the start of each batch mode, so that the degree of superheat of refrigerant in the refrigerant circuit (50) reaches a predetermined value.Type: ApplicationFiled: May 30, 2006Publication date: April 2, 2009Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Nobuki Matsui, Yoshinori Narikawa
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Publication number: 20070214810Abstract: A humidity control system (10) is provided which includes a refrigerant circuit (60). The refrigerant circuit (60) includes first and second absorbent-supported heat exchangers (61, 62) and performs a refrigeration cycle by the circulation of refrigerant. In addition, in the refrigerant circuit (60), the circulation direction of refrigerant is reversible. The first and second heat exchangers (61, 62) are disposed in a main casing (11) of a main unit (90). In the main unit (90), the distribution route of air is changed such that a first air stream is passed through either one of the first and second heat exchangers (61, 61) that is functioning as an evaporator while a second air stream is passed through the other heat exchanger that is functioning as a condenser. A compressor (63) of the refrigerant circuit (60) is disposed in a compressor unit (91) of separate installation from the main unit (90).Type: ApplicationFiled: March 30, 2005Publication date: September 20, 2007Inventors: Tomohiro Yabu, Yoshinori Narikawa
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Publication number: 20070209385Abstract: A humidity control system (10) is disclosed which includes a refrigerant circuit (60). The refrigerant circuit (60) includes first and second absorbent-supported heat exchangers (61, 62) and performs a refrigeration cycle by the circulation of refrigerant. In addition, in the refrigerant circuit (60), the circulation direction of refrigerant is reversible. The first and second heat exchangers (61, 62) are disposed in a casing (11). In the humidity control system (10), the distribution route of air is changed such that a first air stream is passed through either one of the first and second heat exchangers (61, 61) that is functioning as an evaporator while a second air stream is passed through the other heat exchanger that is functioning as a condenser. A compressor (63), an expansion mechanism (65), and a four-way valve (64) in the refrigerant circuit (60) are disposed together with the heat exchangers (61, 62) in the casing (11).Type: ApplicationFiled: March 30, 2005Publication date: September 13, 2007Inventors: Tomohiro Yabu, Shuji Ikegami, Yoshinori Narikawa
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Patent number: 7096684Abstract: A humidity control device includes a first adsorption element (81) and a second adsorption element (82). A first filter (301) is provided under the first adsorption element (81), while a second filter (302) is provided under the second adsorption element (82). The humidity control device performs first operation and second operation alternately. Directions of air flowing through the respective filters (301, 302) are reversed between the first operation and the second operation. Reversal of the direction of the air flowing through each filter (301, 302) removes dust and the like from each filter (301, 302).Type: GrantFiled: August 4, 2003Date of Patent: August 29, 2006Assignee: Daikin Industries Ltd.Inventors: Tomohiro Yabu, Yoshinori Narikawa, Satoshi Ishida
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Publication number: 20060162367Abstract: A humidity control device includes a first adsorption element (81) and a second adsorption element (82). A first filter (301) is provided under the first adsorption element (81), while a second filter (302) is provided under the second adsorption element (82). The humidity control device performs first operation and second operation alternately. Directions of air flowing through the respective filters (301, 302) are reversed between the first operation and the second operation. Reversal of the direction of the air flowing through each filter (301, 302) removes dust and the like from each filter (301, 302).Type: ApplicationFiled: August 4, 2003Publication date: July 27, 2006Applicant: DAIKIN INDUSTRIES, LTDInventors: Tomohiro Yabu, Yoshinori Narikawa, Satoshi Ishida