Patents by Inventor Eisaku Okubo
Eisaku Okubo 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: 20230173429Abstract: An air conditioning rotating body including a rotor having a cylindrical shape. The rotor is housed in a casing so as to be freely rotatable. The casing includes a seal member. The air conditioning rotating body treats air passing through the rotor in an axial direction. The seal member extends in a radial direction of the rotor and separates air passages. An end face of the rotor in the axial direction is provided with at least one spoke in contact with the seal member. A contact point of the seal member with the spoke is configured to move in the radial direction as the rotor rotates.Type: ApplicationFiled: January 31, 2023Publication date: June 8, 2023Inventors: Tsunahiro OHDOU, Takashi TAKAHASHI, Eisaku OKUBO, Hidekazu TANAKA
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Publication number: 20230167906Abstract: An air conditioning rotating body includes a rotor having a cylindrical shape, and a labyrinth seal structure. The rotor is housed in a casing so as to be freely rotatable. The air conditioning rotating body treats air passing through the rotor in an axial direction. The labyrinth seal structure is provided between an outer circumferential portion of the rotor and the casing. The labyrinth seal structure includes a first protrusion protruding in the axial direction from the rotor toward the casing, and a second protrusion protruding in the axial direction from the casing toward the rotor.Type: ApplicationFiled: January 31, 2023Publication date: June 1, 2023Inventors: Tsunahiro OHDOU, Takashi TAKAHASHI, Eisaku OKUBO, Hidekazu TANAKA
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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: 20220074608Abstract: The humidity control unit includes: an air passage through which a first space which is a target space and a second space communicate with each other; a moisture absorber arranged in the air passage and configured to absorb moisture from air and desorb the moisture to the air; a heat source arranged in the air passage and configured to at least cool or heat the moisture absorber; an air transport mechanism configured to allow the air in the air passage to flow in reverse directions; and a controller configured to control the heat source and the air transport mechanism.Type: ApplicationFiled: November 19, 2021Publication date: March 10, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takeshi ARAKAWA, Yu JIANG, Takayuki SUNAYAMA, Eisaku OKUBO, Takashi TAKAHASHI
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Patent number: 11112151Abstract: In an air conditioner which is a refrigeration apparatus, a heat source unit has a heat-source-side heat exchanger in which a refrigerant exchanges heat with heat source water. The heat-source-side heat exchanger includes a plurality of heat exchange sections, and has a heat exchange region whose size can be adjusted through changing the number of heat exchange sections into which the refrigerant flows. The heat source unit has a controller which can adjust the size of the heat exchange region of the heat-source-side heat exchanger based on a differential pressure index value. This can broaden the temperature range of the heat source water within which the heat source unit of the refrigeration apparatus is operable.Type: GrantFiled: August 2, 2017Date of Patent: September 7, 2021Assignee: Daikin Industries, Ltd.Inventors: Hiroki Ueda, Eisaku Okubo
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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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Publication number: 20190170416Abstract: In an air conditioner which is a refrigeration apparatus, a heat source unit has a heat-source-side heat exchanger in which a refrigerant exchanges heat with heat source water. The heat-source-side heat exchanger includes a plurality of heat exchange sections, and has a heat exchange region whose size can be adjusted through changing the number of heat exchange sections into which the refrigerant flows. The heat source unit has a controller which can adjust the size of the heat exchange region of the heat-source-side heat exchanger based on a differential pressure index value. This can broaden the temperature range of the heat source water within which the heat source unit of the refrigeration apparatus is operable.Type: ApplicationFiled: August 2, 2017Publication date: June 6, 2019Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hiroki UEDA, Eisaku OKUBO
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Patent number: 9557069Abstract: A dehumidification system includes a first dehumidification unit having an outdoor air cooling heat exchanger, a second dehumidification unit using two adsorption heat exchangers such that an air passage is switched, and a third dehumidification unit having an adsorption rotor. Low-temperature low-humidity air cooled and dehumidified in the second dehumidification unit is supplied to the third dehumidification unit to reduce energy for recovery of the third dehumidification unit and to realize energy conservation in the dehumidification system and reduction in cost of the dehumidification system.Type: GrantFiled: September 28, 2012Date of Patent: January 31, 2017Assignees: DAIKIN INDUSTRIES, LTD., DAIKIN APPLIED SYSTEMS CO., LTD.Inventors: Nobuki Matsui, Eisaku Okubo, Toshiyuki Natsume, Yasunori Okamoto, Koichi Kuwana, Takahiro Kusabe, Tetsuro Iwata, Hideki Uchida
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Patent number: 9297543Abstract: A dehumidification system for a dry clean room includes: a dry chamber supplied with air having a lower humidity than air in the dry clean room; a main dehumidification unit which supplies air to the dry clean room; and a terminal dehumidification unit which processes the air to be supplied from the dry clean room to the dry chamber, thus achieving energy saving and cost reduction for the dehumidification system for the dry clean room.Type: GrantFiled: December 11, 2013Date of Patent: March 29, 2016Assignees: DAIKIN INDUSTRIES, LTD., DAIKIN APPLIED SYSTEMS CO., LTD.Inventors: Hiroshi Nakayama, Toshiyuki Natsume, Naotoshi Fujita, Eisaku Okubo, Nobuki Matsui
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Publication number: 20150300664Abstract: A dehumidification system for a dry clean room includes: a dry chamber supplied with air having a lower humidity than air in the dry clean room; a main dehumidification unit which supplies air to the dry clean room; and a terminal dehumidification unit which processes the air to be supplied from the dry clean room to the dry chamber, thus achieving energy saving and cost reduction for the dehumidification system for the dry clean room.Type: ApplicationFiled: December 11, 2013Publication date: October 22, 2015Applicants: DAIKIN APPLIED SYSTEMS CO., LTD., DAIKIN INDUSTRIES, LTD.Inventors: Hiroshi NAKAYAMA, Toshiyuki NATSUME, Naotoshi FUJITA, Eisaku OKUBO, Nobuki MATSUI
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Publication number: 20140202190Abstract: A dehumidification system includes a first dehumidification unit having an outdoor air cooling heat exchanger, a second dehumidification unit using two adsorption heat exchangers such that an air passage is switched, and a third dehumidification unit having an adsorption rotor. Low-temperature low-humidity air cooled and dehumidified in the second dehumidification unit is supplied to the third dehumidification unit to reduce energy for recovery of the third dehumidification unit and to realize energy conservation in the dehumidification system and reduction in cost of the dehumidification system.Type: ApplicationFiled: September 28, 2012Publication date: July 24, 2014Inventors: Nobuki Matsui, Eisaku Okubo, Toshiyuki Natsume, Yasunori Okamoto, Koichi Kuwana, Takahiro Kusabe, Tetsuro Iwata, Hideki Uchida
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Patent number: 7874174Abstract: A humidity control system during humidification operation sequentially repeats a first mode in which a second adsorption heat exchanger (82) serves as an evaporator and the remaining adsorption heat exchangers serve as evaporators, a second mode in which a third adsorption heat exchanger (83) serves as an evaporator and the remaining adsorption heat exchangers serve as evaporators and a third mode in which a first adsorption heat exchanger (81) serves as an evaporator and the remaining adsorption heat exchangers serve as evaporators. For example, during the first mode, the first adsorption heat exchanger (81) serving as an evaporator adsorbs moisture in a first air. Furthermore, in the second adsorption heat exchanger (82) serving as a condenser, the adsorbent is regenerated to humidify a second air. Furthermore, in the third adsorption heat exchanger (83) serving as an evaporator, the second air given moisture and heat in the second adsorption heat exchanger (82) is cooled.Type: GrantFiled: March 20, 2006Date of Patent: January 25, 2011Assignee: Daikin Industries, Ltd.Inventors: Tomohiro Yabu, Eisaku Okubo
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Patent number: 7717163Abstract: The difference in linear thermal expansion coefficient between the fins (57) and the adsorbent layer (58) is made smaller than the difference in the linear thermal expansion coefficient between the fins (57) and the adsorbent.Type: GrantFiled: March 29, 2005Date of Patent: May 18, 2010Assignee: Daikin Industries, Ltd.Inventors: Hirohiko Matsushita, Takahisa Sueoka, Shuji Ikegami, Shun Yoshioka, Eisaku Okubo
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Publication number: 20090288444Abstract: A humidity control system during humidification operation sequentially repeats a first mode in which a second adsorption heat exchanger (82) serves as an evaporator and the remaining adsorption heat exchangers serve as evaporators, a second mode in which a third adsorption heat exchanger (83) serves as an evaporator and the remaining adsorption heat exchangers serve as evaporators and a third mode in which a first adsorption heat exchanger (81) serves as an evaporator and the remaining adsorption heat exchangers serve as evaporators. For example, during the first mode, the first adsorption heat exchanger (81) serving as an evaporator adsorbs moisture in a first air. Furthermore, in the second adsorption heat exchanger (82) serving as a condenser, the adsorbent is regenerated to humidify a second air. Furthermore, in the third adsorption heat exchanger (83) serving as an evaporator, the second air given moisture and heat in the second adsorption heat exchanger (82) is cooled.Type: ApplicationFiled: March 20, 2006Publication date: November 26, 2009Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tomohiro Yabu, Eisaku Okubo
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Publication number: 20070204979Abstract: The difference in linear thermal expansion coefficient between the fins (57) and the adsorbent layer (58) is made smaller than the difference in the linear thermal expansion coefficient between the fins (57) and the adsorbent.Type: ApplicationFiled: March 29, 2005Publication date: September 6, 2007Inventors: Hirohiko Matsushita, Takahisa Sueoka, Shuji Ikegami, Shun Yoshioka, Eisaku Okubo
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Patent number: 6770106Abstract: Hydrogen-rich reformed gas is produced by reaction including partial oxidation of feed gas in a reforming reaction section (6). In this case, for the purpose of reducing temperature variations in the reforming reaction section (6), improving the thermal efficiency thereof and providing a reformer (A) with a simple and compact construction, the reformer (A) is formed in a double-wall structure consisting of a housing (1) and partitions (2), (2) inside of the housing (1), the reforming reaction section (6) is contained between the partitions (2), (2), and a feed gas passage (3) is provided by the space between the housing (1) and the partition (2). In this manner, the feed gas passage (3) is provided in the surrounding area of the reforming reaction section (6). The reforming reaction section (6) is thermally insulated by the feed gas passage (3) so that temperature variations in the reforming reaction section (6) can be reduced.Type: GrantFiled: August 28, 2001Date of Patent: August 3, 2004Assignee: Daikin Industries, LTDInventors: Yasunori Okamoto, Nobuki Matsui, Shuji Ikegami, Kazuo Yonemoto, Eisaku Okubo, Isao Ohgami
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Patent number: 6394178Abstract: A plate-type heat exchanger is constructed by piling a plurality of heat transfer plates (P3) having an aspect ratio (=(longitudinal length (Y))/(lateral length (X))) of 1.5. The heat transfer plate (P3) is formed of a substantially planar plate in rectangular shape and has wave-shaped heat transfer enhancement surfaces (20a), (30a) formed on its surfaces. The four corners of the heat transfer plate, i.e., the lower left corner, the upper right corner, the upper left corner and the lower right corner, are formed with a first opening (21a) as an inlet of a first flow channel, a second opening (22a) as an outlet of the first flow channel, a third opening (23a) as an inlet of a second flow channel and a fourth opening (24a) as an outlet of the second flow channel, respectively. Around the openings (21a) through (24a), respective seals (12a) through (15a) are provided to rise toward the front side or the back side of the heat transfer plate.Type: GrantFiled: August 25, 2000Date of Patent: May 28, 2002Assignee: Daikin Industries, Ltd.Inventors: Kaori Yoshida, Takeshi Ebisu, Eisaku Okubo, Katsuhiko Yamada