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    A METHOD FOR CONTROLLING PRESSURE AND OIL LEVEL IN AN OIL RECEIVER OF A VAPOUR COMPRESSIONS SYSTEM
    11.
    发明申请
    A METHOD FOR CONTROLLING PRESSURE AND OIL LEVEL IN AN OIL RECEIVER OF A VAPOUR COMPRESSIONS SYSTEM 审中-公开
    一种控制蒸汽压缩系统油接收器压力和油位的方法

    公开(公告)号：WO2017220702A1

    公开(公告)日：2017-12-28

    申请号：PCT/EP2017/065325

    申请日：2017-06-21

    Applicant: DANFOSS A/S

    Inventor： SCHMIDT, Flemming Morten ,  PRINS, Jan ,  SCHMIDT, Frede ,  FREDSLUND, Kristian

    IPC: F25B31/00

    Abstract: A method for controlling a valve arrangement (10) interconnecting at least one oil separator (8) and an oil receiver (9) in a vapour compression system (1) is disclosed. A pressure difference between a pressure prevailing inside the oil separator(s) (8) and a pressure prevailing inside the oil receiver (9) is obtained. Then a duration for an open time of an open/close sequence of the valve arrangement (10) is derived, based on the obtained pressure difference, and the valve arrangement (10) is controlled in accordance with the derived duration of an open time. The supply of oil to the oil receiver (9) can be accurately controlled, regardless of the operating conditions.

    Abstract translation: 公开了一种用于控制互连蒸气压缩系统（1）中的至少一个油分离器（8）和油接收器（9）的阀装置（10）的方法。 获得油分离器（8）内主要的压力与油接收器（9）内的压力之间的压力差。 然后基于所获得的压力差导出阀装置（10）的打开/关闭序列的打开时间的持续时间，并且根据导出的打开时间的持续时间来控制阀装置（10）。 无论操作条件如何，均可精确控制机油供应（9）的供油量。

    A METHOD FOR CONTROLLING A VAPOUR COMPRESSION SYSTEM DURING GAS BYPASS VALVE MALFUNCTION
    13.
    发明公开
    A METHOD FOR CONTROLLING A VAPOUR COMPRESSION SYSTEM DURING GAS BYPASS VALVE MALFUNCTION 审中-公开

    公开(公告)号：EP3545243A1

    公开(公告)日：2019-10-02

    申请号：EP17807760.8

    申请日：2017-11-15

    Applicant: Danfoss A/S

    Inventor： FREDSLUND, Kristian ,  MADSEN, Kenneth Bank ,  PRINS, Jan ,  SCHMIDT, Frede

    IPC: F25B49/02

    Abstract: 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.

    A METHOD FOR SWITCHING COMPRESSOR CAPACITY
    15.
    发明公开
    A METHOD FOR SWITCHING COMPRESSOR CAPACITY 审中-公开

    公开(公告)号：EP3371523A1

    公开(公告)日：2018-09-12

    申请号：EP16788142.4

    申请日：2016-10-31

    Applicant: Danfoss A/S

    Inventor： FREDSLUND, Kristian ,  PRINS, Jan ,  MADSEN, Kenneth, Bank ,  SCHMIDT, Frede

    IPC: F25B1/10 ,  F25B9/08 ,  F25B41/04

    Abstract: A method for operating a compressor unit (2) comprising one or more compressors (8, 9, 10) is disclosed, the compressor unit (2) being arranged in a vapour compression system (1). Two or more options for distributing the available compressor capacity of the compressor unit (2) between being connected to a high pressure suction line (11) and to a medium pressure suction line (13) are defined. For each option, an expected impact on one or more operating parameters of the vapour compression system (1), resulting from distributing the available compressor capacity according to the option, is predicted. An option is selected, based on the predicted expected impact for the options, and based on current operating demands of the vapour compression system (1), and the available compressor capacity is distributed according to the selected option, e.g. by means of settings of one or more valve arrangements (14, 15).

    A METHOD FOR CONTROLLING A VAPOUR COMPRESSION SYSTEM IN A FLOODED STATE
    16.
    发明公开
    A METHOD FOR CONTROLLING A VAPOUR COMPRESSION SYSTEM IN A FLOODED STATE 有权

    公开(公告)号：EP3365620A1

    公开(公告)日：2018-08-29

    申请号：EP16781480.5

    申请日：2016-10-14

    Applicant: Danfoss A/S

    Inventor： PRINS, Jan ,  SCHMIDT, Frede ,  MADSEN, Kenneth, Bank ,  FREDSLUND, Kristian

    IPC: F25B49/02

    CPC classification number: F25B49/022 ,  F25B5/02 ,  F25B6/02 ,  F25B9/08 ,  F25B2341/0012 ,  F25B2400/075 ,  F25B2400/16 ,  F25B2400/23 ,  F25B2500/28

    Abstract: A method for controlling a vapour compression system (1) is disclosed. The vapour compression system (1) comprises 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) being allowed to be operated in a flooded state 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.

    A METHOD FOR CONTROLLING A VARIABLE CAPACITY EJECTOR UNIT
    20.
    发明公开
    A METHOD FOR CONTROLLING A VARIABLE CAPACITY EJECTOR UNIT 审中-公开
    一种控制可变容量推杆装置的方法

    公开(公告)号：EP3189288A1

    公开(公告)日：2017-07-12

    申请号：EP15730787.7

    申请日：2015-06-23

    Applicant: Danfoss A/S

    Inventor： MADSEN, Kenneth Bank ,  PRINS, Jan ,  FREDSLUND, Kristian

    IPC: F25B41/00 ,  F25B41/04

    CPC classification number: F25B41/00 ,  F25B41/04 ,  F25B2341/0012 ,  F25B2341/0013 ,  F25B2341/0015 ,  F25B2600/17 ,  F25B2600/2503 ,  F25B2700/195 ,  F25B2700/21163

    Abstract: A method for controlling a variable capacity ejector unit (7) arranged in a refrigeration system (1) is disclosed. An ejector control signal for the ejector unit (7) is generated, based on an obtained temperature and an obtained pressure of refrigerant leaving a heat rejecting heat exchanger (3), or on the basis of a high pressure valve control signal for controlling an opening degree of a high pressure valve (6) arranged fluidly in parallel with the ejector unit (7). The ejector control signal indicates whether the capacity of the ejector unit (7) should be increased, decreased or maintained. The capacity of the ejector unit (7) is controlled in accordance with the generated ejector control signal. The power consumption of the refrigeration system (1) is reduced, while the pressure of the refrigerant leaving the heat rejecting heat exchanger (3) is maintained at an acceptable level.

    Abstract translation: 公开了一种用于控制布置在制冷系统（1）中的可变容量喷射器单元（7）的方法。 基于获得的温度和获得的离开排热换热器（3）的制冷剂的压力，或者基于用于控制开口的开口的高压阀控制信号来生成用于喷射器单元（7）的喷射器控制信号 （7）平行流动布置的高压阀（6）的高度。 喷射器控制信号指示喷射器单元（7）的容量是应该增加，减少还是保持。 根据生成的喷射器控制信号来控制喷射器单元（7）的容量。 制冷系统（1）的功耗降低，而离开排热热交换器（3）的制冷剂压力保持在可接受的水平。

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