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公开(公告)号：US20230221024A1
公开(公告)日：2023-07-13
申请号：US18021305
申请日：2021-09-15
发明人： David STEEN , Kevin CORNELIS , Arne DEGRANDE , Yuusuke NAKAGAWA , Harshit TANWAR
IPC分类号： F24F11/36 , F24F1/0068 , F24F11/84
CPC分类号： F24F11/36 , F24F1/0068 , F24F11/84
摘要： A safety system for a heat pump system includes a plurality of valve units each having refrigerant pipe portions with control valves, a refrigerant leakage detector, and a casing accommodating the valves and the refrigerant leakage detector and formed with first and second openings. The safety system further includes a connection structure connecting the internal spaces of the casings via the first and second openings, and a discharge structure connected to the connection structure or one of the casings and configured to discharge air from the internal space of the casing in which a refrigerant leakage has occurred. The casing has first and second lateral faces facing different directions, and the first opening is formed in the first lateral face and the second opening is formed in the second lateral face.
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公开(公告)号：US20240011661A1
公开(公告)日：2024-01-11
申请号：US18021324
申请日：2021-09-15
摘要： An air conditioning system includes a compressor unit including a compressor, a heat exchanger unit including an outdoor heat exchanger, an indoor unit, and a valve unit including a liquid control valve and a gas control valve. The heat exchanger unit is installed in a first space, while the compressor unit and the valve unit are installed in a second space. The system further includes a first leakage detector disposed in the second space, and a ventilation control structure that is configured to switch the state of the second space from a first state to a second state when the detected concentration of the first refrigerant is equal to or greater than a first detection value threshold, in the second state a ventilation of the second space being promoted more than in the first state.
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公开(公告)号：US20190234660A1
公开(公告)日：2019-08-01
申请号：US16338257
申请日：2017-09-29
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA , Masahiro HONDA
CPC分类号： F25B41/04 , F25B1/00 , F25B13/00 , F25B49/02 , F25B2600/2501
摘要： An air conditioning system, which is a refrigeration apparatus that performs a refrigeration cycle in a refrigerant circuit, includes an outdoor heat exchanger, an indoor heat exchanger, a first control valve, a second control valve, a third control valve, and a pressure adjusting portion. The first control valve and the second control valve, which block flow of refrigerant when fully closed, are disposed in a gas-side refrigerant flow path. The gas-side refrigerant flow path is disposed between the outdoor heat exchanger and the indoor heat exchanger. The third control valve, which blocks flow of refrigerant when fully closed, is disposed in a liquid-side refrigerant flow path. The liquid-side refrigerant flow path is disposed between the outdoor heat exchanger and the indoor heat exchanger. The pressure adjusting portion adjusts the pressure of refrigerant in an indoor-side refrigerant flow path. The indoor-side refrigerant flow path is disposed between the first control valve and the second control valve or the third control valve and the indoor heat exchanger. The pressure adjusting portion includes a pressure adjusting valve. The pressure adjusting valve bypasses refrigerant in the indoor-side refrigerant flow path to an outdoor-side refrigerant flow path. The outdoor-side refrigerant flow path is disposed between the first control valve and the second control valve or the third control valve and the outdoor heat exchanger.
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公开(公告)号：US20200088431A1
公开(公告)日：2020-03-19
申请号：US16690685
申请日：2019-11-21
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA
IPC分类号： F24F11/36 , F25B5/02 , F25B6/02 , F25B29/00 , F25B13/00 , F25B41/00 , F24F11/46 , F25B41/04 , F24F11/88 , F24F11/49 , F25B49/00 , F25B49/02 , F24F11/89 , F24F11/84
摘要： When refrigerant leakage occurs, a controller in an air conditioner performs first shutoff control to open a liquid relay shutoff valve and close an indoor expansion valve and a gas relay shutoff valve on the basis of information from a refrigerant leakage detector.
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公开(公告)号：US20190249912A1
公开(公告)日：2019-08-15
申请号：US16338345
申请日：2017-09-29
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Masahiro HONDA , Yuusuke OKA
IPC分类号： F25B49/02 , F24F1/0007 , F25B1/00 , F25B13/00 , F25B41/04
CPC分类号： F25B49/02 , F24F1/0007 , F25B1/00 , F25B13/00 , F25B41/04 , F25B2313/0233 , F25B2341/0662 , F25B2400/13 , F25B2600/2513 , F25B2700/21152
摘要： An air conditioner includes: liquid-side indoor expansion valves corresponding to a liquid side of respective indoor heat exchangers; and gas-side indoor expansion valves corresponding to a gas side of the respective indoor heat exchangers. In a case where both a heating-operation indoor heat exchanger and a heating-stopped indoor heat exchanger are present, the controller of the air conditioner controls the liquid-side indoor expansion valve and the gas-side indoor expansion valve corresponding to the heating-stopped indoor heat exchanger such that an opening degree of the gas-side indoor expansion valve becomes smaller than an opening degree of the liquid-side indoor expansion valve.
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公开(公告)号：US20190242602A1
公开(公告)日：2019-08-08
申请号：US16385819
申请日：2019-04-16
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA
摘要： When refrigerant leakage occurs, a controller in an air conditioner performs first shutoff control to open a liquid relay shutoff valve and close an indoor expansion valve and a gas relay shutoff valve on the basis of information from a refrigerant leakage detector.
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公开(公告)号：US20200318875A1
公开(公告)日：2020-10-08
申请号：US16649767
申请日：2017-09-29
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA , Masahiro HONDA
摘要： A refrigeration apparatus includes: a heat source unit including a compressor for refrigerant and a heat-source-side heat exchanger; utilization units, each of which is connected in parallel to the heat source unit and includes a utilization-side heat exchanger; a refrigerant-flow-path switching unit that includes first gas-side control valves, each of which switches a flow of refrigerant in a corresponding one of the utilization units, and individually switches a flow of refrigerant in each of the utilization units; a first gas-side connection pipe disposed between the heat source unit and each of the first gas-side control valves and through which high-pressure gas refrigerant flows; first gas-side branch pipes, each of which is included in the first gas-side connection pipe and communicates with a corresponding one of the utilization units; and a blocking valve.
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公开(公告)号：US20200033036A1
公开(公告)日：2020-01-30
申请号：US16338221
申请日：2017-09-29
摘要： In a refrigeration apparatus including a refrigerant circuit in which a refrigerant in a gas-liquid two-phase state flows through a liquid-side connection pipe, a refrigerant-amount determining method and a refrigerant-amount determining device capable of grasping an appropriate refrigerant charging amount corresponding to the length of the connection pipe is provided. Provided is a refrigerant-amount determining method for a refrigerant to be charged to a refrigeration apparatus including a refrigerant circuit in which a compressor, an outdoor heat exchanger that functions as a condenser, an outdoor expansion valve, indoor heat exchangers that function as evaporators, a liquid-side connection pipe that feeds the refrigerant, which has passed through the outdoor heat exchanger and then has been decompressed by the outdoor expansion valve, to each of the indoor heat exchangers, and a gas-side connection pipe that feeds the refrigerant, which has passed through each of the indoor heat exchangers, to a suction side of the compressor, are connected to one another. The method determines a refrigerant amount of the refrigerant to be charged to the refrigerant circuit such that a refrigerant amount per unit length of the liquid-side connection pipe increases as a length of the liquid-side connection pipe is larger.
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公开(公告)号：US20190338986A1
公开(公告)日：2019-11-07
申请号：US16337825
申请日：2017-09-26
发明人： Takuro YAMADA , Masahiro HONDA , Yuusuke NAKAGAWA , Yuusuke OKA
摘要： To reduce noise coming from an indoor unit in an air conditioning apparatus that has an outdoor unit that has a compressor and an outdoor heat exchanger, the indoor unit that has an indoor heat exchanger, and a liquid refrigerant connection pipe and a gas refrigerant connection pipe that interconnect both units and in which a liquid pressure adjusting expansion valve that reduces a pressure of a refrigerant flowing through the liquid refrigerant connection pipe in such a way that the refrigerant is in a gas-liquid two-phase state is provided in an outdoor liquid refrigerant pipe that interconnects the liquid-side end of the outdoor heat exchanger and the liquid refrigerant connection pipe. An external expansion valve unit having an external expansion valve that further reduces the pressure of the refrigerant whose pressure has been reduced in the liquid pressure adjusting expansion valve is provided in the outdoor liquid refrigerant pipe.
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10.发明申请公开(公告)号：US20190293417A1
公开(公告)日：2019-09-26
申请号：US16465483
申请日：2017-11-30
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Masahiro HONDA
摘要： A pipe diameter determination method for determining a pipe diameter of a liquid-side connection pipe of a refrigeration apparatus that performs a cooling operation and a heating operation where the refrigeration apparatus includes an outdoor unit that has a compressor and an outdoor heat exchanger; indoor unit that has an indoor heat exchanger, and the liquid-side connection pipe and a gas-side connection pipe that connect the outdoor unit and the indoor unit with each other is provided. The pipe diameter determination method includes: determining the pipe diameter of the liquid-side connection pipe based on a cooling capacity and a heating capacity provided by the outdoor unit and the indoor unit that are installed.
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