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公开(公告)号：US11041667B2
公开(公告)日：2021-06-22
申请号：US16360189
申请日：2019-03-21
Inventor： Atsuhiko Yokozeki , Koji Naito , Kazuhito Sekiba , Shoutaro Yamamoto , Hiroaki Kaneko , Kazuhiko Tani
Abstract: To achieve higher efficiency at a low-load region and to enable power saving throughout a year. The refrigeration cycle apparatus 1 includes a compressor 4 that has a flow in/out port 4d through which a refrigerant is capable of flowing out and flowing in, in fluid communication with a compression room 4c; pipes 21, 22 disposed at a suction side of the compressor 4; a pipe 25 connected to the flow in/out port 4d of the compressor 4; a pipe 27 that has one end connected to the pipe 25 and an opposite end connected to the pipe 21; and a second solenoid valve 13 for opening and closing a fluid passage of the pipe 27.
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公开(公告)号：US10527322B2
公开(公告)日：2020-01-07
申请号：US15758419
申请日：2015-09-11
Inventor： Koji Naito , Kazumoto Urata , Kazuhiko Tani , Masayoshi Murofushi , Gen Yasuda
Abstract: Provided is a air conditioner including high-and-low-pressure gas pipe expansion valves each of which is provided to a corresponding one of the cooling-heating switching units and adjusts feeding of high-temperature and high-pressure gas refrigerant to the corresponding indoor unit; and a refrigeration cycle controller which adjusts a valve opening degree of the high-and-low-pressure gas pipe expansion valve of the cooling-heating switching unit connected to one of the indoor units which is not in heating operation, in accordance with a determination result on excess or deficiency of refrigerant in a refrigeration cycle.
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公开(公告)号：US10907871B2
公开(公告)日：2021-02-02
申请号：US16200889
申请日：2018-11-27
Inventor： Hiroki Kinoshita , Kazuhiro Tsuchihashi , Naoyuki Fushimi , Toshiki Mochizuki , Shuntaro Inoue , Masayoshi Murofushi , Yoshinori Iwashina , Kazuhiko Tani
Abstract: 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.
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公开(公告)号：US10907902B2
公开(公告)日：2021-02-02
申请号：US15758416
申请日：2015-09-10
Inventor： Mikihito Tokudi , Koji Naito , Kazumoto Urata , Kenji Matsumura , Kazuhiko Tani , Masayoshi Murofushi , Takumi Kamiaka
Abstract: A heat exchanger includes: a gas-side port connected to piping for a gaseous refrigerant; a liquid-side port connected to piping for a liquid refrigerant; a refrigerant path that links the gas-side port to the liquid-side port; at least four heat exchange part regions that perform heat exchange between air and the refrigerant flowing through the refrigerant path; and a branching and merging part that branches and merges the refrigerant path to connect the heat exchange part regions in series between the gas-side port and the liquid-side port through the refrigerant path. The heat exchange part regions are connected to each other through the branching and merging part so as to allow the number of refrigerant paths provided in the heat exchange part region near the gas-side port to be greater than the number of refrigerant paths provided in the heat exchange part region near the liquid-side port.
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