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公开(公告)号：US11898783B2
公开(公告)日：2024-02-13
申请号：US17598060
申请日：2020-03-30
CPC分类号： F25B49/022 , F24F11/32 , F24F11/38 , F24F11/39 , F25B40/02 , F25B41/31 , F25B2500/222 , F25B2600/025 , F25B2600/11 , F25B2600/2513 , F25B2700/04
摘要： A performance degradation diagnosis system includes a determining unit, and control unit. A refrigeration cycle apparatus includes a refrigerant circuit having a compressor, heat-source-side heat exchanger, and use-side heat exchanger. The determining unit determines, based on an index indicating an operation state of the refrigeration cycle apparatus, performance degradation of the refrigeration cycle apparatus with respect to each of a plurality of performance degradation factors. In a case in which the determining unit determines performance degradation, the control unit grasps an operation condition of the refrigeration cycle apparatus which is operating. In a case in which the operation condition of the refrigeration cycle apparatus is not suitable to determine performance degradation with respect to a performance degradation factor of a determination target, the control unit controls the operation condition of the refrigeration cycle apparatus so that the operation condition of the refrigeration cycle apparatus becomes an appropriate operation condition.
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公开(公告)号：US12013139B2
公开(公告)日：2024-06-18
申请号：US17280643
申请日：2019-09-27
IPC分类号： F25B49/02 , F24F3/06 , F24F11/36 , F24F11/49 , F24F11/86 , F25B41/31 , F25B45/00 , F24F11/84 , F24F110/10 , F24F110/12 , F24F140/20 , F25B13/00
CPC分类号： F24F11/86 , F24F3/065 , F24F11/36 , F24F11/49 , F25B41/31 , F25B45/00 , F25B49/02 , F24F11/84 , F24F2110/10 , F24F2110/12 , F24F2140/20 , F24F2221/54 , F25B13/00 , F25B2313/0233 , F25B2313/0293 , F25B2313/0314 , F25B2345/006 , F25B2400/13 , F25B2600/2513 , F25B2700/1931 , F25B2700/21
摘要： An air conditioning apparatus includes a refrigerant circuit in which a plurality of indoor units respectively including an indoor heat exchanger and an indoor expansion valve are connected to an outdoor unit including an outdoor expansion valve via a liquid-refrigerant connection pipe. The air conditioning apparatus individually controls each of the indoor units to operate or stop. The air conditioning apparatus includes a controller. When at least one of the indoor heat exchangers functions as a radiator, the controller controls an opening degree of the indoor expansion valve and an opening degree of the outdoor expansion valve. The apparatus—determines whether a refrigerant amount in the refrigerant circuit is appropriate on the basis of an amount of change corresponding to a change in state of a refrigerant between the indoor expansion valve and the outdoor expansion valve.
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公开(公告)号：US11971203B2
公开(公告)日：2024-04-30
申请号：US17753563
申请日：2020-07-29
发明人： Manabu Yoshimi , Takeshi Hikawa , Shinichi Kasahara , Shohei Yamada , Hiroyuki Kagitani , Hidetaka Kishimoto
CPC分类号： F25B49/02 , F24F11/36 , F24F11/64 , F25B2400/13 , F25B2600/2513 , F25B2700/04 , F25B2700/21151 , F25B2700/21152
摘要： A refrigerant amount determining device includes: an operation data acquiring unit configured to acquire operation data of an air conditioning system; a calculating unit configured to calculate a refrigerant amount index value from the operation data acquired; an inferring unit configured to infer information regarding correction of the refrigerant amount index value using a correction model and at least one of the acquired operation data or the calculated refrigerant amount index value; and a determining unit configured to determine a refrigerant amount of the air conditioning system based on the information regarding correction of the refrigerant amount index value.
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公开(公告)号：US11346570B2
公开(公告)日：2022-05-31
申请号：US17298432
申请日：2019-11-29
发明人： Manabu Yoshimi , Takeshi Hikawa
摘要： A refrigerant leakage determination system capable of detecting leakage of refrigerant without requiring complicated processing is provided. A refrigerant leakage determination system is a refrigerant leakage determination system of a refrigeration cycle apparatus that includes a refrigerant circuit including a heat-source-side heat exchanger and has, as operating modes, a normal mode in which the heat-source-side heat exchanger is caused to function as an evaporator and a defrosting mode in which the heat-source-side heat exchanger frosted during a normal operation is defrosted. The refrigerant leakage determination system includes a processor configured to acquire defrosting information regarding a relationship between a normal operation period and the number of defrosting operations, and memory that stores the defrosting information. The processor is further configured to determine, based on the acquired defrosting information, leakage of refrigerant in the refrigerant circuit.
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公开(公告)号：US11274846B2
公开(公告)日：2022-03-15
申请号：US17298432
申请日：2019-11-29
发明人： Manabu Yoshimi , Takeshi Hikawa
摘要： A refrigerant leakage determination system capable of detecting leakage of refrigerant without requiring complicated processing is provided. A refrigerant leakage determination system is a refrigerant leakage determination system of a refrigeration cycle apparatus that includes a refrigerant circuit including a heat-source-side heat exchanger and has, as operating modes, a normal mode in which the heat-source-side heat exchanger is caused to function as an evaporator and a defrosting mode in which the heat-source-side heat exchanger frosted during a normal operation is defrosted. The refrigerant leakage determination system includes a processor configured to acquire defrosting information regarding a relationship between a normal operation period and the number of defrosting operations, and memory that stores the defrosting information. The processor is further configured to determine, based on the acquired defrosting information, leakage of refrigerant in the refrigerant circuit.
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