Patents by Inventor Yukio Kiguchi
Yukio Kiguchi 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: 20240011662Abstract: According to one embodiment, the air conditioner comprises an outdoor unit, an indoor unit, a refrigerant cutoff unit, an airtight state detection unit, a notification unit, and a control unit. The control unit determines a refrigerant cutoff condition for whether or not to urge a flow of the refrigerant flowing into and from the indoor unit to be cut off and, if the refrigerant cutoff condition is satisfied, urges the refrigerant cutoff unit to cut off the flow, and urges the notification unit to notify a detection result of an airtight state of a pipe detected by the airtight state detection unit, in the indoor unit in which the flow of the refrigerant is cut off.Type: ApplicationFiled: September 21, 2023Publication date: January 11, 2024Inventors: Atsushi Baba, Masaaki Sato, Hiroichi Yamaguchi, Yukio Kiguchi, Kohei Maruko, Shohei Arita
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Publication number: 20240011689Abstract: According to one embodiment, a refrigeration cycle apparatus includes a main flow channel of a refrigerant, a compressor, a condenser, an evaporator, a branch channel, an expansion valve, a supercooling heat exchanger, an injection flow channel, and a control unit. The control unit determines, based on whether the determination condition is satisfied or not, a determination condition for adjusting an opening degree of the expansion valve and adjusts the opening degree of the expansion valve according to a first target value for a discharge temperature of the refrigerant from the compressor, or a second target value for a superheat degree of the refrigerant flowing through the injection flow channel.Type: ApplicationFiled: September 22, 2023Publication date: January 11, 2024Inventors: Kohei Maruko, Shohei Arita, Masaaki Sato, Hiroichi Yamaguchi, Atsushi Baba, Yukio Kiguchi
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Publication number: 20220205671Abstract: According to one embodiment, an air conditioner carries out a heating operation, a cooling operation, a cooling/heating mixed operation in which a higher priority is given to cooling, and a cooling/heating mixed operation in which a higher priority is given to heating.Type: ApplicationFiled: March 17, 2022Publication date: June 30, 2022Inventors: Tetsuma Hamashima, Yukio Kiguchi, Shun Asari, Shohei Arita, Ken Miura, Tomoki Shimizu
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Publication number: 20220178601Abstract: A refrigeration cycle device of the embodiment includes a refrigerant flow path. The refrigerant flow path allows a refrigerant to flow through a compressor, a condenser, an expansion device, and an evaporator. The refrigerant contains CF3I. The refrigerant flow path includes a filter capable of capturing iodine ions.Type: ApplicationFiled: February 28, 2022Publication date: June 9, 2022Applicant: Toshiba Carrier CorporationInventors: Shohei ARITA, Kaku OKADA, Yukio KIGUCHI, Atsushi BABA, Yuko HATTORI
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Patent number: 9851133Abstract: According to one embodiment, a refrigeration cycle apparatus, a fusible plug is attached to a low-pressure-side pipe between an evaporator and a compressor. The refrigeration cycle apparatus includes a heat quantity reduction member. The fusible plug fuses when a temperature of heat transmitted from the low-pressure-side pipe to the fusible plug reaches a predetermined value or more, and then opens the inside of the low-pressure-side pipe to atmosphere. The heat quantity reduction member reduces the quantity of heat to be transmitted to the fusible plug.Type: GrantFiled: April 22, 2015Date of Patent: December 26, 2017Assignee: TOSHIBA CARRIER CORPORATIONInventors: Kentaro Nakaguchi, Yukio Kiguchi, Hideaki Suzuki, Ryouhei Kamiya
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Patent number: 9683751Abstract: An outdoor unit for a multi-type air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve, a liquid tank, an accumulator, a shutoff valve provided for the refrigerant pipe between a liquid refrigerant inlet/outlet port and the liquid tank in the outdoor unit, and a first bypass circuit provided in the refrigerant pipe for bypassing the shutoff valve through a capillary tube to connect a liquid refrigerant inlet/outlet port side to an upper side of the refrigerant pipe in a gravity direction. The outdoor unit further includes a second bypass circuit for connecting a bottom portion of the liquid tank to an inlet side of the accumulator via an electromagnetic valve.Type: GrantFiled: September 20, 2013Date of Patent: June 20, 2017Assignee: TOSHIBA CARRIER CORPORATIONInventors: Yuji Inada, Yukio Kiguchi, Kiyotaka Ueno
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Publication number: 20150300701Abstract: According to one embodiment, a refrigeration cycle apparatus, a fusible plug is attached to a low-pressure-side pipe between an evaporator and a compressor. The refrigeration cycle apparatus includes a heat quantity reduction member. The fusible plug fuses when a temperature of heat transmitted from the low-pressure-side pipe to the fusible plug reaches a predetermined value or more, and then opens the inside of the low-pressure-side pipe to atmosphere. The heat quantity reduction member reduces the quantity of heat to be transmitted to the fusible plug.Type: ApplicationFiled: April 22, 2015Publication date: October 22, 2015Inventors: Kentaro NAKAGUCHI, Yukio KIGUCHI, Hideaki SUZUKI, Ryouhei KAMIYA
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Publication number: 20150267925Abstract: An outdoor unit for a multi-type air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve, a liquid tank, an accumulator, a shutoff valve provided for the refrigerant pipe between a liquid refrigerant inlet/outlet port and the liquid tank in the outdoor unit, and a first bypass circuit provided in the refrigerant pipe for bypassing the shutoff valve through a capillary tube to connect a liquid refrigerant inlet/outlet port side to an upper side of the refrigerant pipe in a gravity direction. The outdoor unit further includes a second bypass circuit for connecting a bottom portion of the liquid tank to an inlet side of the accumulator via an electromagnetic valve.Type: ApplicationFiled: September 20, 2013Publication date: September 24, 2015Inventors: Yuji Inada, Yukio Kiguchi, Kiyotaka Ueno
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Publication number: 20120304685Abstract: An air conditioner includes oil balancing pipes that extract lubricating oil stored in an oil separator and each of compressors in which a specified amount of the lubricating oil or more is stored, a distributor that distributes the lubricating oil led from the oil separator and the compressors to a plurality of channels, and oil return pipes that communicatively connect the distribution channels of the distributor and a refrigerant inlet pipe of each of the compressors to return the lubricating oil to each of the compressors.Type: ApplicationFiled: August 13, 2012Publication date: December 6, 2012Applicant: TOSHIBA CARRIER CORPORATIONInventor: Yukio Kiguchi
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Patent number: 5958114Abstract: An indoor unit of an air-conditioner having a unit body, provided on a rear of a ceiling, having an lower surface portion exposed indoor and an indoor heat exchanger and a blower in its exterior, a decorative panel, structured as the lower surface portion for the unit body, having an inlet port for guiding air in a room to the indoor heat exchanger, a filter fixing portion, structured as a part of the decorative panel, having a filter attached to a position opposite to the inlet port to be detachable, a support portion for supporting the filter fixing portion to be freely rotatable to the decorative panel, and an open/close driving mechanism for driving the filter fixing portion to be freely opened and closed against the decorative panel in a state that the support portion is used as a fulcrum, the mechanism for hanging the filter fixing portion from a ceiling surface when being opened to be moved.Type: GrantFiled: October 3, 1997Date of Patent: September 28, 1999Assignee: Kabushiki Kaisha ToshibaInventors: Hiroshi Sunahara, Yasunori Ichikawa, Kenji Gajina, Katsuaki Yamagishi, Yukio Kiguchi, Masahiko Sasaki, Hiroyuki Sugiyama, Daisuke Saito, Teturo Ozawa
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Patent number: 5568732Abstract: An air conditioning apparatus and method of controlling same wherein the air conditioner includes a refrigerating circuit having a variable capacity compressor, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger; a variable speed outdoor fan for circulating an outside air through the outdoor heat exchanger; and an outdoor heat exchanger temperature detector for detecting the temperature of the outdoor heat exchanger. The outside air temperature is estimated from the detected outdoor heat exchanger temperature, the capacity of the variable capacity compressor and the speed of the variable speed outdoor fan, and is used to control the compressor and/or the fan.Type: GrantFiled: April 12, 1995Date of Patent: October 29, 1996Assignee: Kabushiki Kaisha ToshibaInventors: Masao Isshiki, Yukio Kiguchi, Takashi Sato, Yasuhiro Kageyama