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公开(公告)号：US11231185B2
公开(公告)日：2022-01-25
申请号：US16371181
申请日：2019-04-01
Inventor： Mikihito Tokudi , Gen Yasuda , Takanori Isogawa , Kazuhiro Tsuchihashi , Hiroyuki Ogisu
Abstract: 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.
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公开(公告)号：US10557648B2
公开(公告)日：2020-02-11
申请号：US15618321
申请日：2017-06-09
Inventor： Koji Naito , Naoyuki Fushimi , Kazumoto Urata , Gen Yasuda , Kazunori Fukuda
Abstract: A cooling/heating switching unit includes first to third fittings, expansion valves and expansion-valve driving sections, a housing, a heat insulating material, and a refrigerant leak detection sensor. The first and second fittings respectively connect with a high/low-pressure-gas main pipe and a low-pressure-gas main pipe, which are linked to an outdoor unit. The third fitting connects with an indoor-unit connection pipe, which is linked to indoor units. The expansion valve for high/low-pressure-gas pipe, the expansion valve for low-pressure-gas pipe, and expansion-valve driving sections selectively connect the first or second fitting with the third fitting via a refrigerant pipe to control a flow direction of refrigerant. The housing houses the refrigerant pipe. The heat insulating material fills inside of the housing to insulate the refrigerant pipe arranged inside of the housing from heat. The refrigerant leak detection sensor is installed outside of the housing to detect leaked refrigerant.
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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：US11204181B2
公开(公告)日：2021-12-21
申请号：US16371181
申请日：2019-04-01
Inventor： Mikihito Tokudi , Gen Yasuda , Takanori Isogawa , Kazuhiro Tsuchihashi , Hiroyuki Ogisu
Abstract: 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.
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