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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 CONTROL ARRANGEMENT FOR CONTROLLING SUPERHEAT
    13.
    发明申请
    A CONTROL ARRANGEMENT FOR CONTROLLING SUPERHEAT 审中-公开
    控制超控的控制装置

    公开(公告)号：WO2014063707A1

    公开(公告)日：2014-05-01

    申请号：PCT/DK2013/050291

    申请日：2013-09-11

    Applicant: DANFOSS A/S

    Inventor： IZADI-ZAMANABAD, Roozbeh ,  SCHMIDT, Frede

    IPC: F25B49/02

    CPC classification number: F25B49/02 ,  F25B41/062 ,  F25B2341/0683 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/197 ,  F25B2700/21172 ,  F25B2700/21173 ,  F25B2700/21175

    Abstract: A control arrangement (1) for controlling a superheat of a vapour compression system is disclosed. The control arrangement (1) comprises a first sensor (4) and a second sensor (5) for measuring control parameters allowing a superheat value to be derived; a first controller (6) arranged to receive a signal from the first sensor (4), a second controller (10) arranged to receive a superheat value derived by a subtraction element (9), and to supply a control signal, based on the derived superheat value, and in accordance with a reference superheat value, and a summation element (8) arranged to receive input from the first controller (6) and from the second controller (10), said summation element (8) being arranged to supply a control signal for controlling opening degree of the expansion device (3) on the basis of the received input. According to a first aspect the control arrangement comprises a low pass filter (7) arranged to receive a signal from the first sensor (4) and to supply a signal to the subtraction element (9), said low pass filter (7) being designed in accordance with dynamic behaviour of the evaporator (2) and/or of the first sensor (4). According to a second aspect the first controller (6) comprises a PD element.

    Abstract translation: 公开了一种用于控制蒸汽压缩系统的过热度的控制装置（1）。 控制装置（1）包括用于测量允许过热值被导出的控制参数的第一传感器（4）和第二传感器（5） 布置成从第一传感器（4）接收信号的第一控制器（6），布置成接收由减法元件（9）导出的过热值的第二控制器（10），并且基于 并且根据参考过热值，以及被配置为接收来自第一控制器（6）和第二控制器（10）的输入的求和元件（8），所述求和元件（8）被布置成供应 控制信号，用于根据接收到的输入来控制扩展装置（3）的开度。 根据第一方面，控制装置包括布置成接收来自第一传感器（4）的信号并向减法元件（9）提供信号的低通滤波器（7），所述低通滤波器（7）被设计 根据蒸发器（2）和/或第一传感器（4）的动态特性。 根据第二方面，第一控制器（6）包括PD元件。

    A METHOD FOR HANDLING FAULT MITIGATION IN A VAPOUR COMPRESSION SYSTEM
    15.
    发明公开
    A METHOD FOR HANDLING FAULT MITIGATION IN A VAPOUR COMPRESSION SYSTEM 审中-公开

    公开(公告)号：EP3545241A1

    公开(公告)日：2019-10-02

    申请号：EP17801674.7

    申请日：2017-11-15

    Applicant: Danfoss A/S

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

    IPC: F25B41/06 ,  F25B49/02

    Abstract: A method for controlling a vapour compression system (1) is disclosed. A mass flow of refrigerant along a part of the refrigerant path is estimated, based on measurements performed by one or more pressure sensors (10, 12, 13) for measuring a refrigerant pressure at selected positions along the refrigerant path and one or more temperature sensors (11, 14) for measuring a refrigerant temperature at selected positions along the refrigerant path. A refrigerant pressure or a refrigerant temperature at a selected position a pressure sensor (10, 12, 13) or temperature sensor (11, 14) along the refrigerant path is derived, based on the estimated mass flow. The vapour compression system (1) is allowed to continue operating, even if a sensor (10, 11, 12, 13, 14) is malfunctioning or unreliable.

    A CONTROL ARRANGEMENT FOR CONTROLLING SUPERHEAT
    18.
    发明公开
    A CONTROL ARRANGEMENT FOR CONTROLLING SUPERHEAT 审中-公开
    控制系统控制热量

    公开(公告)号：EP2912389A1

    公开(公告)日：2015-09-02

    申请号：EP13762056.3

    申请日：2013-09-11

    Applicant: Danfoss A/S

    Inventor： IZADI-ZAMANABADI, Roozbeh ,  SCHMIDT, Frede

    IPC: F25B49/02

    CPC classification number: F25B49/02 ,  F25B41/062 ,  F25B2341/0683 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/197 ,  F25B2700/21172 ,  F25B2700/21173 ,  F25B2700/21175

    Abstract: A control arrangement for controlling a superheat of a vapour compression system includes a first sensor and a second sensor for measuring control parameters allowing a superheat value to be derived, a first controller arranged to receive a signal from the first sensor, a second controller arranged to receive a superheat value derived by a subtraction element, and to supply a control signal, based on the derived superheat value and a reference superheat value, and a summation element arranged to receive input from the the controllers, the summation element being arranged to supply a control signal for controlling opening degree of the expansion device. According to a first aspect the control arrangement includes a low pass filter arranged to receive a signal from the first sensor and to supply a signal to the subtraction element. According to a second aspect the first controller includes a PD element.

    CONTROL ARRANGEMENT FOR THE SUPERHEAT TEMPERATURE OF AT LEAST ONE EVAPORATOR OF A REFRIGERATION SYSTEM
    19.
    发明公开
    CONTROL ARRANGEMENT FOR THE SUPERHEAT TEMPERATURE OF AT LEAST ONE EVAPORATOR OF A REFRIGERATION SYSTEM 失效
    制冷系统中至少一个蒸发器过热温度的控制布置

    公开(公告)号：EP0784776A1

    公开(公告)日：1997-07-23

    申请号：EP95933339.0

    申请日：1995-10-11

    Applicant: Danfoss A/S

    Inventor： SCHMIDT, Frede

    IPC: F25B1 ,  F25B41 ,  G05B11 ,  G05D23

    CPC classification number: F25B41/062 ,  F25B2341/065 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/21174 ,  F25B2700/21175 ,  G05B11/42 ,  G05D23/1931 ,  Y02B30/72

    Abstract: A control arrangement for the superheat temperature of at least one evaporator (8) of a refrigeration system having a refrigerant circulation, in which at least one compressor, a condenser, an electronically controlled expansion valve (7) and the evaporator (8) are arranged in series, contains a measuring device (9, 10, 11) connected to the evaporator (8), which device produces a measurement signal (Tü) that is a measure of the superheat temperature of the refrigerant in the evaporator (8), a comparator (1) to which the measurement signal (Tü) and a desired superheat temperature signal (Tüs) are arranged to be supplied, and a PID controller (2) arranged between the comparator (1) and the expansion valve (7). For rapid compensation of changes in the superheat temperature, a control signal (S) proportional to the evaporation temperature (To) of the refrigerant is arranged to be supplied additionally to the PID controller (2).

    Abstract translation: 一种用于具有制冷剂循环的制冷系统的至少一个蒸发器（8）的过热温度的控制装置，其中布置有至少一个压缩机，冷凝器，电子控制的膨胀阀（7）和蒸发器（8） 包括连接到蒸发器（8）的测量装置（9,10,11），所述装置产生作为蒸发器（8）中的制冷剂的过热温度的度量的测量信号（Tü），a 测量信号（Tü）和期望的过热温度信号（Tüs）被布置成提供给其的比较器（1）以及布置在比较器（1）和膨胀阀（7）之间的PID控制器（2）。 为了快速补偿过热温度的变化，与制冷剂的蒸发温度（To）成比例的控制信号（S）被布置为另外供应给PID控制器（2）。

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