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公开(公告)号：US20240019183A1
公开(公告)日：2024-01-18
申请号：US18373097
申请日：2023-09-26
发明人： Ryuhei KAJI , Eiji KUMAKURA , Atsushi YOSHIMI , Masaki TANAKA , Hiroki UEDA , Masaki NAKAYAMA
IPC分类号： F25B45/00
CPC分类号： F25B45/00
摘要： A refrigerant recovery system includes a cylinder, a first detection unit, and a control unit. The cylinder accommodate a refrigerant filling a refrigeration cycle apparatus. The first detection unit detects a predetermined physical quantity in order to calculate a composition of the refrigerant accommodated in the cylinder. The control unit acquires a result of detection by the first detection unit and outputs the result as a first detection result.
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公开(公告)号：US20240019177A1
公开(公告)日：2024-01-18
申请号：US18374254
申请日：2023-09-28
发明人： Ikuhiro IWATA , Eiji KUMAKURA , Tetsushi TSUDA , Shinjiro DOMI , Atsushi YOSHIMI
CPC分类号： F25B9/006 , F25B43/006 , B60H1/00392
摘要： An air conditioner, which is a heat pump apparatus, includes a refrigerant circuit, a compressor, and a composition adjustment mechanism. The refrigerant circuit circulates a non-azeotropic mixture refrigerant including a first refrigerant and a second refrigerant having a boiling point higher than the first refrigerant. The compressor compresses the non-azeotropic mixture refrigerant. The first refrigerant is a compound represented by a molecular formula having one or more carbon-carbon unsaturated bonds. The composition adjustment mechanism is provided in the refrigerant circuit. The composition adjustment mechanism prevents an increase in the rate of the first refrigerant included in the non-azeotropic mixture refrigerant discharged from the compressor.
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公开(公告)号：US20210348816A1
公开(公告)日：2021-11-11
申请号：US17280619
申请日：2019-09-20
发明人： Takuro YAMADA , Atsushi YOSHIMI , Eiji KUMAKURA , Ikuhiro IWATA , Shun OHKUBO
摘要： Efficiency in refrigerant charging work is addressed when a recovered refrigerant recovered from a first heat source unit is to be charged to a second heat source unit. A refrigerant charging method is a charging method used when a first heat source unit of an already installed refrigeration cycle apparatus in which a refrigeration cycle is to be performed by a refrigerant that circulates is to be replaced with a second heat source unit. The refrigerant charging method includes recovering a first refrigerant from an already installed refrigeration cycle apparatus and obtaining a recovered refrigerant and charging the recovered refrigerant and charging a second refrigerant whose composition differs from the composition of the recovered refrigerant to the refrigeration cycle apparatus after renewal that includes the second heat source unit.
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公开(公告)号：US20200333051A1
公开(公告)日：2020-10-22
申请号：US16954973
申请日：2018-12-10
发明人： Eiji KUMAKURA , Takuro YAMADA , Atsushi YOSHIMI , Ikuhiro IWATA , Mitsushi ITANO , Daisuke KARUBE , Yuuki YOTSUMOTO , Kazuhiro TAKAHASHI , Tatsuya TAKAKUWA , Yuzo KOMATSU , Shun OHKUBO
摘要： A refrigeration cycle is a refrigeration cycle using a mixed refrigerant which is a flammable refrigerant and which contains at least 1,2-difluoroethylene (HFO-1132(E)), and includes a compressor (1), a heat-source-side heat exchanger (3), an expansion mechanism (4), a use-side heat exchanger (2), and a decompression mechanism (7). The decompression mechanism (7) decompresses, between an inlet and an outlet of the heat-source-side heat exchanger (3), the mixed refrigerant flowing through the heat-source-side heat exchanger (3) that functions as an evaporator.
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5.发明申请公开(公告)号：US20200325375A1
公开(公告)日：2020-10-15
申请号：US16912130
申请日：2020-06-25
发明人： Eiji KUMAKURA , Takuro YAMADA , Atsushi YOSHIMI , Ikuhiro IWATA , Mitsushi ITANO , Daisuke KARUBE , Yuuki YOTSUMOTO , Kazuhiro TAKAHASHI , Yuzo KOMATSU , Shun OHKUBO , Tatsuya TAKAKUWA
IPC分类号： C09K5/04
摘要： A refrigeration cycle apparatus capable of keeping a LCCP low when a heat cycle is performed using a sufficiently small-GWP refrigerant, and a method of determining a refrigerant enclosure amount in the refrigeration cycle apparatus are provided. An outdoor unit (20) including a compressor (21) and an outdoor heat exchanger (23), an indoor unit (30) including an indoor heat exchanger (31), and a refrigerant pipe (5, 6) that connects the outdoor unit (20) and the indoor unit (30) to each other are provided. A refrigerant containing at least 1,2-difluoroethylene is enclosed in a refrigerant circuit (10) that is constituted by connecting the compressor (21), the outdoor heat exchanger (23), and the indoor heat exchanger (31) to one another. An enclosure amount of the refrigerant in the refrigerant circuit (10) per 1 kW of refrigeration capacity satisfies a condition of 160 g or more and 560 g or less.
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公开(公告)号：US20240027115A1
公开(公告)日：2024-01-25
申请号：US18374453
申请日：2023-09-28
发明人： Eiji KUMAKURA , Ryuhei KAJI , Atsushi YOSHIMI , Masaki TANAKA , Hiroki UEDA , Masaki NAKAYAMA
CPC分类号： F25B49/02 , F25B9/002 , F25B41/20 , F25B2700/19 , F25B2700/21
摘要： In an air conditioner, during an operation, a gas-liquid two-phase non-azeotropic mixture refrigerant enters a receiver and accumulates in the receiver in a state where a gas phase and a liquid phase are separated. For example, when the non-azeotropic mixture refrigerant includes two components, i.e., a high-boiling refrigerant and a low-boiling refrigerant, the controller may estimate the ratio (composition ratio) between the low-boiling refrigerant and the high-boiling refrigerant in each of the gas phase and the liquid phase based on the temperature and the pressure of the non-azeotropic mixture refrigerant in the receiver. Thus, the controller may estimate the composition ratio of the liquid-phase non-azeotropic mixture refrigerant flowing out of the receiver as the composition ratio of the non-azeotropic mixture refrigerant circulating in the refrigerant circuit.
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公开(公告)号：US20230228464A1
公开(公告)日：2023-07-20
申请号：US18125299
申请日：2023-03-23
发明人： Takeru MIYAZAKI , Teruo KIDO , Takuro YAMADA , Atsushi YOSHIMI , Ikuhiro IWATA , Eiji KUMAKURA
CPC分类号： F25B15/002 , F25B49/043 , F25B41/40
摘要： A heat transfer method uses a heat transfer system including: a heat source unit in which heat is exchanged between a heat transfer medium and a heat source; a utilization unit in which heat is exchanged between the heat transfer medium and a temperature adjustment target; and a first flow path and a second flow path that connect the heat source unit and the utilization unit. The heat transfer medium flows through the first flow path from the heat source unit to the utilization unit, and flows through the second flow path from the utilization unit to the heat source unit. In the heat transfer method, inorganic hydrate slurry, in which an inorganic hydrate that absorbs heat when dissolved in water is mixed with water, is used as the heat transfer medium.
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公开(公告)号：US20220220353A1
公开(公告)日：2022-07-14
申请号：US17656952
申请日：2022-03-29
发明人： Atsushi YOSHIMI , Eiji KUMAKURA , Ikuhiro IWATA , Takeru MIYAZAKI , Takuro YAMADA , Yoshiki YAMANOI , Yuuta IYOSHI
摘要： An air conditioning apparatus is an air conditioning apparatus dedicated to cooling and includes a first circuit and a second circuit. The first circuit has an outdoor heat exchanger that cools a first refrigerant by outdoor air. In the second circuit, a first heat transfer medium that is cooled by exchanging heat with the first refrigerant that flows in the first circuit flows. The first refrigerant is a HFO refrigerant having a critical temperature higher than that of R32.
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公开(公告)号：US20220003469A1
公开(公告)日：2022-01-06
申请号：US17280406
申请日：2019-09-20
发明人： Takuro YAMADA , Atsushi YOSHIMI , Eiji KUMAKURA , Ikuhiro IWATA , Shun OHKUBO
摘要： There is provided a refrigerant charging method in which a foreign material and moisture are avoided from entering a heat source unit until a refrigeration cycle apparatus is configured. The refrigerant charging method is a method of charging a refrigerant to a refrigerant circuit in which a refrigeration cycle is to be performed by a circulating refrigerant, the refrigerant circuit being configured by connecting a second heat source unit and a utilization unit to each other. The refrigerant charging method includes charging a first refrigerant to the second heat source unit before connecting the second heat source unit to the utilization unit to configure the refrigerant circuit, and connecting the second heat source unit to the utilization unit and charging a second refrigerant that differs from the first refrigerant to the refrigerant circuit to obtain the circulating refrigerant that includes the second refrigerant and the first refrigerant that is charged in the second heat source unit.
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公开(公告)号：US20200332166A1
公开(公告)日：2020-10-22
申请号：US16955565
申请日：2018-12-18
发明人： Eiji KUMAKURA , Takuro YAMADA , Atsushi YOSHIMI , Ikuhiro IWATA , Mitsushi ITANO , Daisuke KARUBE , Yuuki YOTSUMOTO , Kazuhiro TAKAHASHI , Tatsuya TAKAKUWA , Yuzo KOMATSU , Shun OHKUBO , Keisuke OHTSUKA , Yoshinari ASANO , Keiji AOTA , Yuuichi YANAGI , Yoshikazu NAKAO , Takeo ABE , Yumi TODA , Tetsushi TSUDA
摘要： A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.
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