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公开(公告)号：US20220390160A1
公开(公告)日：2022-12-08
申请号：US17761700
申请日：2020-09-08
发明人： Yuusuke FUJIMOTO , Ryuuichi TOYOTA , Kentaroh TAOKA , Atsushi OHTANI , Kevin CORNELIS , David STEEN
摘要： A heat pump device having a refrigerant circuit includes: a valve configured to maintain an opening degree during non-energization; a valve drive circuit configured to cause operation of the valve; a valve controller configured to control the valve drive circuit; and a power source circuit configured to supply a power source to the valve drive circuit. The power source circuit includes: a first power source circuit unit configured to receive power source supply from outside to generate a DC: voltage; and a second power source circuit unit for backup. The second power source circuit unit receives power source supply from the outside to store power in a capacitor, and connects the capacitor in parallel to a first output electric path of the first power source circuit unit.
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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：US20230145115A1
公开(公告)日：2023-05-11
申请号：US17918418
申请日：2021-05-13
发明人： Kevin CORNELIS , Satoshi KAWANO
CPC分类号： F25B41/39 , F25B30/02 , F25B41/20 , F25B2500/222 , F25B2600/2519
摘要： Provided is a heat pump system having a compressor, a liquid-side on-off valve, a gas-side on-off valve, and a controller. The controller is configured to perform a refrigerant recovery operation for recovering refrigerant from a utilization-side piping section to a heatsource-side piping section by operating the compressor while the liquid-side on-off valve is closed and the gas-side on-off valve is open, and control the system such that the gas-side on-off valve starts closing when a predetermined valve-close condition is satisfied during the compressor is operating for recovering refrigerant, and such that the operation of the compressor for recovering refrigerant stops after the closing of the gas-side on-off valve started.
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公开(公告)号：US20220275983A1
公开(公告)日：2022-09-01
申请号：US17630308
申请日：2020-10-29
发明人： Satoshi KAWANO , David STEEN , Kevin CORNELIS
IPC分类号： F25B41/20
摘要： The present invention aims to alleviate the risk of leakage of refrigerant from a refrigerant circuit and particularly at the utilization side of the refrigerant circuit without the need to provide a dedicated bypass for refrigerant leakage prevention. A refrigerant system is configured such that, when a refrigerant leakage detection sensor detects refrigerant leakage, a controller is configured to adjust a opening degree of a bypass expansion valve independently of a pressure and/or temperature value detected by a sensor. A method of controlling a refrigerant system is also provided.
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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：US20230122568A1
公开(公告)日：2023-04-20
申请号：US17799486
申请日：2021-05-13
发明人： Kevin CORNELIS , Satoshi KAWANO
摘要： Provided is a heat pump system having a liquid-side on-off valve, a gas-side on-off valve, an ambient temperature detector configured to detect temperature of fluid which passes through a heatsource-side heat exchanger, and a controller. The controller is configured to perform a refrigerant recovery operation for recovering refrigerant from a utilization-side piping section to a heatsource-side piping section by operating a compressor while the liquid-side on-off valve is closed and the gas-side on-off valve is open, and control the compressor such that, when the ambient temperature is higher than or equal to a predetermined value, increase rate of compressor rotation speed is low compared with that of when the ambient temperature is lower than the predetermined value.
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公开(公告)号：US20230052745A1
公开(公告)日：2023-02-16
申请号：US17973701
申请日：2022-10-26
发明人： Natsuko KITAGAWA , Ryuuichi TOYOTA , Kazunari FUKAGAWA , Keiya NAGAHARA , Satoshi KAWANO , Makoto INOUE , Kevin CORNELIS
IPC分类号： F25B49/02
摘要： A refrigerant cycle apparatus includes a refrigerant circuit that circulates a refrigerant, and a leak sensor that detects a refrigerant leaking from the refrigerant circuit, in which the refrigerant cycle apparatus includes, as an operating mode, a recovery mode for recognizing occurrence of an abnormality in the leak sensor and recovering a refrigerant to a predetermined location in the refrigerant circuit.
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公开(公告)号：US20230042444A1
公开(公告)日：2023-02-09
申请号：US17790618
申请日：2021-03-05
发明人： Satoshi KAWANO , Kevin CORNELIS , Martijn DEPREZ
摘要： A heat pump system includes a first bypass pipe provided with a first bypass valve and connecting a liquid refrigerant pipe and a low-pressure refrigerant pipe, a refrigerant heat exchanger configured to cause a heat-exchange between refrigerant flowing in the liquid refrigerant pipe and refrigerant flowing in first bypass pipe, a second bypass pipe provided with a second bypass valve and connecting the liquid refrigerant pipe and the low-pressure refrigerant pipe, and a controller. The controller is configured to control opening degree of the first bypass valve based on detected superheated temperature of refrigerant flowing in the first bypass pipe, and detected discharge temperature of a compressor and control opening degree of the second bypass valve based on the detected discharge temperature.
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