Patents by Inventor Kazuhiro Tsuchihashi
Kazuhiro Tsuchihashi 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).
-
Refrigerant Quantity Diagnosis Device, Refrigerant System, and Refrigerant Quantity Diagnosis Method
Publication number: 20230304713Abstract: A refrigerant quantity diagnosis device includes: an evaluation value calculation part that calculates a refrigerant quantity index evaluation value including a ratio of a measured refrigerant quantity index value to a reference refrigerant quantity index value in each of a normal period and a determination period; and a refrigerant quantity diagnosis part that diagnoses a refrigerant quantity based on the refrigerant quantity index evaluation value. The evaluation value calculation part calculates a first refrigerant quantity index evaluation value in the normal period and a second refrigerant quantity index evaluation value in the determination period, based on respective reference refrigerant quantity index values having respective values associated with an operating condition of interest, and respective measured refrigerant quantity index values.Type: ApplicationFiled: December 8, 2022Publication date: September 28, 2023Inventors: Yoko KOKUGAN, Hiroshi KUSUMOTO, Keiko OKA, Hisae SHIBUYA, Noriyuki TOKURA, Norikazu SASAKI, Kazuhiro TSUCHIHASHI, Eiji OGATA -
Patent number: 11231185Abstract: An air conditioner provided which has: a main refrigerant circuit including a compressor, a heat source side heat exchanger, a first expansion valve, and a utilization side heat exchanger and configured such that refrigerant flows in the main refrigerant circuit; a sub refrigerant circuit including a cooling member configured such that refrigerant branched from the main refrigerant circuit flows in the cooling member and configured such that refrigerant branched from the main refrigerant circuit flows in the sub refrigerant circuit; and a heat generator to be cooled by the cooling member, wherein a pipe in which part of refrigerant discharged from the compressor flows is connected to the cooling member of the sub refrigerant circuit.Type: GrantFiled: April 1, 2019Date of Patent: January 25, 2022Assignee: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC.Inventors: Mikihito Tokudi, Gen Yasuda, Takanori Isogawa, Kazuhiro Tsuchihashi, Hiroyuki Ogisu
-
Patent number: 11204181Abstract: An air conditioner provided which has: a main refrigerant circuit including a compressor, a heat source side heat exchanger, a first expansion valve, and a utilization side heat exchanger and configured such that refrigerant flows in the main refrigerant circuit; a sub refrigerant circuit including a cooling member configured such that refrigerant branched from the main refrigerant circuit flows in the cooling member and configured such that refrigerant branched from the main refrigerant circuit flows in the sub refrigerant circuit; and a heat generator to be cooled by the cooling member, wherein a pipe in which part of refrigerant discharged from the compressor flows is connected to the cooling member of the sub refrigerant circuit.Type: GrantFiled: April 1, 2019Date of Patent: December 21, 2021Assignee: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC.Inventors: Mikihito Tokudi, Gen Yasuda, Takanori Isogawa, Kazuhiro Tsuchihashi, Hiroyuki Ogisu
-
Patent number: 10907871Abstract: A refrigerant flow path switch arranged between an outdoor device and each of multiple indoor devices controls a refrigerant flow and is provided with a housing; a refrigerant flow path switching circuit having multiple refrigerant flow path switching circuits, wherein each refrigerant flow path switching circuit includes a high/low pressure gas pipe, a low pressure gas pipe, a high/low pressure electric valve provided at the high/low pressure gas pipe, and a low pressure electric valve provided at the low pressure gas pipe. A liquid pipe assembly is arranged in the housing and has multiple liquid pipes connected to the multiple indoor devices. A first divider plate is provided between adjacent ones of the refrigerant flow path switching circuits and divides an internal space of the housing such that a space divided by the first divider plate is in a substantially cubic shape, which is filled with a foaming agent.Type: GrantFiled: November 27, 2018Date of Patent: February 2, 2021Assignee: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC.Inventors: Hiroki Kinoshita, Kazuhiro Tsuchihashi, Naoyuki Fushimi, Toshiki Mochizuki, Shuntaro Inoue, Masayoshi Murofushi, Yoshinori Iwashina, Kazuhiko Tani
-
Patent number: 10557654Abstract: An collective device for switching refrigerant flow arranged between an indoor device and an outdoor device is provided; which includes multiple high-pressure valves; multiple low-pressure valves; a high-pressure header; a low-pressure header; a high-pressure gas pipe connecting each high-pressure valve and the high-pressure header; and a low-pressure gas pipe connecting each low-pressure valve and the low-pressure header, wherein the multiple high-pressure valves are arranged next to each other in a first direction perpendicular to a vertical direction, the multiple low-pressure valves are arranged next to each other in the first direction, and the low-pressure valves, the low-pressure header, and the low-pressure gas pipe are arranged on one side in a second direction perpendicular to the vertical direction and the first direction with respect to the high-pressure valves, the high-pressure header, and the high-pressure gas pipe.Type: GrantFiled: January 4, 2019Date of Patent: February 11, 2020Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.Inventors: Kazunori Fukuda, Koji Naito, Kazuhiro Tsuchihashi
-
Publication number: 20190226691Abstract: An air conditioner provided which has: a main refrigerant circuit including a compressor, a heat source side heat exchanger, a first expansion valve, and a utilization side heat exchanger and configured such that refrigerant flows in the main refrigerant circuit; a sub refrigerant circuit including a cooling member configured such that refrigerant branched from the main refrigerant circuit flows in the cooling member and configured such that refrigerant branched from the main refrigerant circuit flows in the sub refrigerant circuit; and a heat generator to be cooled by the cooling member, wherein a pipe in which part of refrigerant discharged from the compressor flows is connected to the cooling member of the sub refrigerant circuit.Type: ApplicationFiled: April 1, 2019Publication date: July 25, 2019Inventors: Mikihito TOKUDI, Gen YASUDA, Takanori ISOGAWA, Kazuhiro TSUCHIHASHI, Hiroyuki OGISU
-
Publication number: 20190137154Abstract: An collective device for switching refrigerant flow arranged between an indoor device and an outdoor device is provided; which includes multiple high-pressure valves; multiple low-pressure valves; a high-pressure header; a low-pressure header; a high-pressure gas pipe connecting each high-pressure valve and the high-pressure header; and a low-pressure gas pipe connecting each low-pressure valve and the low-pressure header, wherein the multiple high-pressure valves are arranged next to each other in a first direction perpendicular to a vertical direction, the multiple low-pressure valves are arranged next to each other in the first direction, and the low-pressure valves, the low-pressure header, and the low-pressure gas pipe are arranged on one side in a second direction perpendicular to the vertical direction and the first direction with respect to the high-pressure valves, the high-pressure header, and the high-pressure gas pipe.Type: ApplicationFiled: January 4, 2019Publication date: May 9, 2019Inventors: Kazunori FUKUDA, Koji NAITO, Kazuhiro TSUCHIHASHI
-
Patent number: 10274209Abstract: The present disclosure provides an indoor unit of an air conditioner includes a housing, a centrifugal fan arranged inside the housing, and a heat exchanger arranged so as to surround the centrifugal fan, in which the heat exchanger includes an area cut in a direction of rotation of the centrifugal fan. A current plate provided at a final portion of the heat exchanger in the direction of the rotation of the centrifugal fan includes a first face which is extended in a height direction of the heat exchanger and blocks an air flow produced between the centrifugal fan and the heat exchanger and a second face protruded from the first face in a direction opposite the air flow. The indoor unit has an advantageous effect to suppress an inflow of air to a space where the heat exchanger is cut in the indoor unit to reduce the power consumption.Type: GrantFiled: July 27, 2016Date of Patent: April 30, 2019Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.Inventors: Daiwa Sato, Kazuhiro Tsuchihashi
-
Publication number: 20190093931Abstract: A refrigerant flow path switch arranged between an outdoor device and each of multiple indoor devices controls a refrigerant flow and is provided with a housing; a refrigerant flow path switching circuit having multiple refrigerant flow path switching circuits, wherein each refrigerant flow path switching circuit includes a high/low pressure gas pipe, a low pressure gas pipe, a high/low pressure electric valve provided at the high/low pressure gas pipe, and a low pressure electric valve provided at the low pressure gas pipe. A liquid pipe assembly is arranged in the housing and has multiple liquid pipes connected to the multiple indoor devices. A first divider plate is provided between adjacent ones of the refrigerant flow path switching circuits and divides an internal space of the housing such that a space divided by the first divider plate is in a substantially cubic shape, which is filled with a foaming agent.Type: ApplicationFiled: November 27, 2018Publication date: March 28, 2019Inventors: Hiroki KINOSHITA, Kazuhiro TSUCHIHASHI, Naoyuki FUSHIMI, Toshiki MOCHIZUKI, Shuntaro INOUE, Masayoshi MUROFUSHI, Yoshinori IWASHINA, Kazuhiko TANI
-
Publication number: 20170074525Abstract: The present disclosure provides an indoor unit of an air conditioner includes a housing, a centrifugal fan arranged inside the housing, and a heat exchanger arranged so as to surround the centrifugal fan, in which the heat exchanger includes an area cut in a direction of rotation of the centrifugal fan. A current plate provided at a final portion of the heat exchanger in the direction of the rotation of the centrifugal fan includes a first face which is extended in a height direction of the heat exchanger and blocks an air flow produced between the centrifugal fan and the heat exchanger and a second face protruded from the first face in a direction opposite the air flow. The indoor unit has an advantageous effect to suppress an inflow of air to a space where the heat exchanger is cut in the indoor unit to reduce the power consumption.Type: ApplicationFiled: July 27, 2016Publication date: March 16, 2017Inventors: Daiwa SATO, Kazuhiro TSUCHIHASHI
-
Publication number: 20160356518Abstract: An indoor unit of air conditioner, and the air conditioner are provided. The indoor unit includes a human detection sensor for detection of a predetermined range, and a plurality of desired ranges by using general purpose human detection sensors and lenses. The indoor unit of air conditioner includes a plurality of outlet ports through which air is blown to an interior of a room in different directions, and a human detection unit for detecting a human in the room. The human detection unit includes a plurality of human detection sensors installed in the plurality of outlet ports correspondingly, and lenses provided for the human detection sensors, respectively. The plurality of human detection sensors detect ranges corresponding to the different outlet ports, respectively.Type: ApplicationFiled: October 27, 2014Publication date: December 8, 2016Inventors: Atsushi KURACHI, Kazuhiro TSUCHIHASHI, Satoshi NAKAYAMA, Naoyuki FUSHIMI
-
Publication number: 20160223211Abstract: The present invention provides an air conditioning unit having an indoor unit, the indoor unit including: a casing; a centrifugal fan having a hub, a shroud, and blades disposed therebetween; and an indoor heat exchanger which surrounds the centrifugal fan, the casing containing the centrifugal fan and the indoor heat exchanger.Type: ApplicationFiled: December 17, 2015Publication date: August 4, 2016Inventors: Jun XUE, Daiwa SATOH, Hideshi OBARA, Naoyuki FUSHIMI, Taku IWASE, Kazuhiro TSUCHIHASHI
-
Patent number: 6343482Abstract: A heat pump type air conditioner comprising: an exterior unit including an exterior heat exchanger, a plurality of compressors, a four-way valve, an exterior expansion device, and an injection circuit for injecting the liquid refrigerant into each of the plurality of compressors; and a plurality of interior units, each of which includes an interior heat exchanger, connected to the exterior unit. The exterior unit further comprises device for controlling flow rate of the liquid refrigerant to be injected in accordance with number of the plurality of interior units.Type: GrantFiled: October 31, 2000Date of Patent: February 5, 2002Inventors: Takeshi Endo, Shinichiro Yamada, Kazuhiro Tsuchihashi, Noriyoshi Yamada, Kensaku Oguni, Satoru Yoshida