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1. 发明申请

US20220146169A1 APPARATUS, METHOD, AND PROGRAM FOR ESTIMATING AMOUNT OF REFRIGERANT 有权
公开(公告)号：US20220146169A1
公开(公告)日：2022-05-12
申请号：US17593292
申请日：2020-02-26
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Yuusuke OKA
IPC分类号： F25B49/02 , F25B40/02 , F25B39/00
摘要： The determination of the refrigerant amount is facilitated. A refrigerant amount inference apparatus infers a refrigerant amount in an air conditioner in which a compressor, a heat source side heat exchanger, a supercooling heat exchanger, a pressure reducing valve, and a use side heat exchanger are connected to piping. The supercooling heat exchanger is a heat exchanger that exchanges heat between refrigerant that passes through a supercooling bypass expansion valve provided in a bypass circuit and refrigerant in a mainstream circuit. The bypass circuit is connected to piping on a suction side of the compressor from a position between the heat source side heat exchanger and the supercooling heat exchanger or a position between the pressure reducing valve and the supercooling heat exchanger. The refrigerant amount inference apparatus includes an acquiring unit configured to acquire a state of refrigerant in first piping provided between the pressure reducing valve and the supercooling heat exchanger and an operation amount related to the state of the refrigerant in the first piping, and a training unit configured to perform training by associating the state of the refrigerant in the first piping and the operation amount related to the state of the refrigerant in the first piping with a refrigerant amount.

2. 发明申请

US20200318875A1 REFRIGERATION DEVICE 审中-公开
公开(公告)号：US20200318875A1
公开(公告)日：2020-10-08
申请号：US16649767
申请日：2017-09-29
申请人： Daikin Industries, LTD.
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA , Masahiro HONDA
IPC分类号： F25B41/04 , F25B13/00 , F25B49/02
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.

3. 发明申请

US20200033036A1 REFRIGERANT-AMOUNT DETERMINING METHOD AND REFRIGERANT-AMOUNT DETERMINING DEVICE 审中-公开
公开(公告)号：US20200033036A1
公开(公告)日：2020-01-30
申请号：US16338221
申请日：2017-09-29
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Masahiro HONDA , Yuusuke OKA , Hiroki SASAYAMA
IPC分类号： F25B45/00 , F25B1/00 , F25B5/02 , F25B49/02
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.

4. 发明申请

US20190234660A1 REFRIGERATION APPARATUS 审中-公开
公开(公告)号：US20190234660A1
公开(公告)日：2019-08-01
申请号：US16338257
申请日：2017-09-29
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA , Masahiro HONDA
IPC分类号： F25B41/04 , F25B13/00 , F25B49/02
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.

5. 发明申请

US20180023870A1 AIR CONDITIONING DEVICE 审中-公开
公开(公告)号：US20180023870A1
公开(公告)日：2018-01-25
申请号：US15543655
申请日：2015-12-17
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Ryuuta OHURA , Yuusuke OKA , Junya MINAMI
IPC分类号： F25B43/02
CPC分类号： F24F11/89 , F25B13/00 , F25B43/02 , F25B49/02 , F25B2313/0314 , F25B2313/0315 , F25B2400/19 , F25B2700/1931 , F25B2700/1933 , F25B2700/21151 , F25B2700/21152
摘要： In an air conditioning device (10) to which an outdoor unit (20) and indoor units (40) are connected, when a flow rate of a gaseous refrigerant in a gas main pipe (72a) is lower than a lower limit flow rate in main pipe, an amount of refrigerating machine oil accumulated in the gas main pipe (72a) is calculated. When gas branch pipes (72b) include a gas branch pipe (72b) having a flow rate lower than a lower limit flow rate in branch pipe even though the flow rate of the gaseous refrigerant in the gas main pipe (72a) is higher than the lower limit flow rate in main pipe, an amount of the machine oil accumulated in the gas branch pipe (72b) is calculated. When the amounts are integrated and the integrated value exceeds a set amount, oil collecting operation is performed.

6. 发明申请

US20200088431A1 AIR CONDITIONER 审中-公开
公开(公告)号：US20200088431A1
公开(公告)日：2020-03-19
申请号：US16690685
申请日：2019-11-21
申请人： DAIKIN INDUSTRIES, LTD.
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.

7. 发明申请

US20190249912A1 AIR CONDITIONER 审中-公开
公开(公告)号：US20190249912A1
公开(公告)日：2019-08-15
申请号：US16338345
申请日：2017-09-29
申请人： DAIKIN INDUSTRIES, LTD.
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.

8. 发明申请

US20190242602A1 AIR CONDITIONER 审中-公开
公开(公告)号：US20190242602A1
公开(公告)日：2019-08-08
申请号：US16385819
申请日：2019-04-16
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Yuusuke OKA
IPC分类号： F24F11/36 , F24F11/84 , F24F11/89 , F25B49/02
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.

9. 发明申请

US20190338986A1 AIR CONDITIONING APPARATUS 审中-公开
公开(公告)号：US20190338986A1
公开(公告)日：2019-11-07
申请号：US16337825
申请日：2017-09-26
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takuro YAMADA , Masahiro HONDA , Yuusuke NAKAGAWA , Yuusuke OKA
IPC分类号： F24F13/24 , F24F3/06 , F24F3/052
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.

10. 发明申请

US20190234643A1 AIR CONDITIONER 审中-公开
公开(公告)号：US20190234643A1
公开(公告)日：2019-08-01
申请号：US16338246
申请日：2017-09-26
申请人： DAIKIN INDUSTRIES, LTD.
发明人： Takuro YAMADA , Yuusuke NAKAGAWA , Masahiro HONDA , Yuusuke OKA
IPC分类号： F24F11/84 , F25B1/10 , F25B5/02 , F25B41/04
CPC分类号： F24F11/84 , F25B1/00 , F25B1/10 , F25B5/00 , F25B5/02 , F25B41/04 , F25B43/00 , F25B2600/2513
摘要： An air conditioner, in which a liquid-pressure adjustment expansion valve that decompresses a refrigerant so that the refrigerant flowing through a liquid-refrigerant connection pipe is in a gas-liquid two-phase state is provided in an outdoor liquid-refrigerant pipe that connects a liquid-side end of an outdoor heat exchanger to the liquid-refrigerant connection pipe, properly transports the refrigerant in a two-phase state while suppressing an increase in a discharge temperature of a compressor. A liquid injection pipe that branches part of a refrigerant flowing through an outdoor liquid-refrigerant pipe and feeds the branched refrigerant to a compressor is connected to a portion of the outdoor liquid-refrigerant pipe on a side of an outdoor heat exchanger with respect to a liquid-pressure adjustment expansion valve.

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