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1.发明申请公开(公告)号：US20190323752A1
公开(公告)日：2019-10-24
申请号：US16071139
申请日：2017-02-03
发明人： Kristian Fredslund , Frede Schmidt , Jan Prins
摘要： A method for controlling a fan (6) of a vapour compression system (1) is disclosed, the fan (6) being arranged to provide a secondary fluid flow across a heat rejecting heat exchanger (3). A temperature difference, ΔT=Tout−Tamb, between a temperature, Tout, of refrigerant leaving the heat rejecting heat exchanger (3) and a temperature, Tamb, of ambient air of the heat rejecting heat exchanger (3) is established. A setpoint value, ΔTsetp, for the temperature difference, ΔT, is obtained, the setpoint value, ΔTsetp, being dependent on the fan speed of the fan (6) in such a manner that the setpoint value, ΔTsetp, increases as the fan speed increases. The fan speed of the fan (6) is controlled in order to control the temperature difference, ΔT, in accordance with the obtained setpoint value, ΔTsetp.
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2.发明授权公开(公告)号：US11460230B2
公开(公告)日：2022-10-04
申请号：US15763904
申请日：2016-10-14
申请人： Danfoss A/S
IPC分类号： F25B49/02 , F25B9/08 , F25B41/00 , F25B41/385
摘要： A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising at least one expansion device (8) and at least one evaporator (9). For each expansion device (8), an opening degree of the expansion device (8) is obtained, and a representative opening degree, ODrep, is identified based on the obtained opening degree(s) of the expansion device(s) (8). The representative opening degree could be a maximum opening degree, ODmax, being the largest among the obtained opening degrees. The representative opening degree, ODrep, is compared to a predefined target opening degree, ODtarget, and a minimum setpoint value, SPrec, for a pressure prevailing inside a receiver (7), is calculated or adjusted, based on the comparison. The vapour compression system (1) is controlled to obtain a pressure inside the receiver (7) which is equal to or higher than the calculated or adjusted minimum setpoint value, SPrec.
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公开(公告)号：US10775086B2
公开(公告)日：2020-09-15
申请号：US15763918
申请日：2016-10-14
申请人： Danfoss A/S
摘要： A method for controlling a vapour compression system having an ejector includes, in the case that a pressure difference between a pressure prevailing in the receiver and a pressure of refrigerant leaving the evaporator decreases below a first lower threshold value, the pressure of refrigerant leaving the heat rejecting heat exchanger is kept at a level which is slightly higher than the pressure level providing optimal coefficient of performance.
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公开(公告)号：US10724778B2
公开(公告)日：2020-07-28
申请号：US16071139
申请日：2017-02-03
发明人： Kristian Fredslund , Frede Schmidt , Jan Prins
IPC分类号： F25B49/02 , F24F11/77 , F24F140/20
摘要： A method for controlling a fan (6) of a vapour compression system (1) is disclosed, the fan (6) being arranged to provide a secondary fluid flow across a heat rejecting heat exchanger (3). A temperature difference, ΔT=Tout−Tamb, between a temperature, Tout, of refrigerant leaving the heat rejecting heat exchanger (3) and a temperature, Tamb, of ambient air of the heat rejecting heat exchanger (3) is established. A setpoint value, ΔTsetp, for the temperature difference, ΔT, is obtained, the setpoint value, ΔTsetp, being dependent on the fan speed of the fan (6) in such a manner that the setpoint value, ΔTsetp, increases as the fan speed increases. The fan speed of the fan (6) is controlled in order to control the temperature difference, ΔT, in accordance with the obtained setpoint value, ΔTsetp.
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公开(公告)号：US10508850B2
公开(公告)日：2019-12-17
申请号：US15763988
申请日：2016-10-14
申请人： Danfoss A/S
摘要： A vapour compression system (1) includes an ejector (6) and a liquid separating device (10) arranged in a suction line. At least one evaporator (9) is allowed to be operated in a flooded state. A flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) is detected, and it is determined whether or not the flow rate is sufficient to remove liquid refrigerant produced by the evaporator(s) (9) from the liquid separating device (10). In the case that it is determined that the flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) is insufficient to remove liquid refrigerant produced by the evaporator(s) (9), the flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) is increased, and/or a flow rate of liquid refrigerant from the evaporator(s) (9) to the liquid separating device (10) is decreased.
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6.发明申请公开(公告)号：US20180283750A1
公开(公告)日：2018-10-04
申请号：US15763904
申请日：2016-10-14
申请人： Danfoss A/S
IPC分类号： F25B49/02
摘要： A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising at least one expansion device (8) and at least one evaporator (9). For each expansion device (8), an opening degree of the expansion device (8) is obtained, and a representative opening degree, ODrep, is identified based on the obtained opening degree(s) of the expansion device(s) (8). The representative opening degree could be a maximum opening degree, ODmax, being the largest among the obtained opening degrees. The representative opening degree, ODrep, is compared to a predefined target opening degree, ODtarget, and a minimum setpoint value, SPrec, for a pressure prevailing inside a receiver (7), is calculated or adjusted, based on the comparison. The vapour compression system (1) is controlled to obtain a pressure inside the receiver (7) which is equal to or higher than the calculated or adjusted minimum setpoint value, SPrec.
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公开(公告)号：US20180231284A1
公开(公告)日：2018-08-16
申请号：US15752042
申请日：2016-07-01
申请人： Danfoss A/S
摘要： A vapour compression system (1) comprising at least two evaporator groups (5a, 5b, 5c), each evaporator group (5a, 5b, 5c) comprising an ejector unit (7a, 7b, 7c), at least one evaporator (9a, 9b, 9c) and a flow control device (8a, 8b, 8c) controlling a flow of refrigerant to the at least one evaporator (9a, 9b, 9c). For each evaporator group (5a, 5b, 5c) the outlet of the evaporator (9a, 9b, 9c) is connected to a secondary inlet (12a, 12b, 12c) of the corresponding ejector unit (7a, 7b, 7c). The vapour compression system (1) can be controlled in an energy efficient and stable manner. A method for controlling the vapour compression system (1) is also disclosed.
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公开(公告)号：US20180100679A1
公开(公告)日：2018-04-12
申请号：US15840573
申请日：2017-12-13
申请人： Danfoss A/S
CPC分类号： F25B49/02 , G05B15/02 , G05B19/056
摘要： The invention relates to a method for configuring, on a control unit, operating parameters of a plurality of devices of a refrigeration system. A user selects on the control unit, among the plurality of devices of the refrigeration system, a first device to configure. Information of valid configurable operating parameters of the first device is provided on the control unit. The user selects at least one of the valid configurable operating parameters of the first device, thereby configuring the first device. Information stored about operating parameters of other devices of the refrigeration system, based on the configuration of the first device, is then provided on the control unit. Finally, the user confirms, on the control unit, one or more operating parameters of one or more of the other devices, thereby configuring the one or more other devices. The invention also relates to a control unit and a refrigeration system.
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公开(公告)号：US20170328604A1
公开(公告)日：2017-11-16
申请号：US15527496
申请日：2015-10-07
申请人： DANFOSS A/S
CPC分类号： F25B9/008 , F25B41/043 , F25B49/02 , F25B2309/061 , F25B2341/0662 , F25B2400/075 , F25B2400/13 , F25B2400/23 , F25B2500/29 , F25B2500/31 , F25B2600/0253 , F25B2600/2509 , F25B2700/195 , F25B2700/2106 , F25B2700/21163 , Y02B30/741
摘要： A method for controlling a vapour compression system (1), the vapour compression system (1) comprising a compressor unit (2) comprising one or more compressors (10, 11, 13), is disclosed. At least one of the compressors (11, 13) of the compressor unit (2) is connectable to a gaseous outlet (9) of a receiver (5), and at least one of the compressors (10, 13) of the compressor unit (2) is connectable to an outlet of an evaporator (7). A parameter of the vapour compression system (1) is measured, an enthalpy of refrigerant leaving the heat rejecting heat exchanger (3) being derivable from the measured parameter. A setpoint value for a pressure inside the receiver (5) is calculated, based on the measured parameter, and the compressor unit (2) is operated in accordance with the calculated setpoint value, and in order to obtain a pressure inside the receiver (5) which is equal to the calculated setpoint value. The vapour compression system (1) is operated in an energy efficient manner over a wide range of ambient temperatures.
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公开(公告)号：US10962262B2
公开(公告)日：2021-03-30
申请号：US16461933
申请日：2017-11-15
申请人： Danfoss A/S
摘要： A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising at least one compressor (2, 16), a heat rejecting heat exchanger (3), a high pressure expansion device (4, 15, 17), a receiver (5), an evaporator expansion device (6), an evaporator (7) and a gas bypass valve (8), arranged in a refrigerant path. It is registered that the gas bypass valve (8) is malfunctioning or saturated, and a pressure value for a pressure prevailing inside the receiver (5) is obtained. Finally, the vapour compression system (1) is controlled in order to control a gaseous refrigerant supply to the receiver (5) to adjust the pressure prevailing inside the receiver (5) to reach a target pressure level.
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