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    AN EXPANSION VALVE WITH VARIABLE OPENING DEGREE
    31.
    发明公开
    AN EXPANSION VALVE WITH VARIABLE OPENING DEGREE 审中-公开
    膨胀维生素MIT EINEM VARIABLENÖFFNUNGSGRAD

    公开(公告)号：EP2646764A2

    公开(公告)日：2013-10-09

    申请号：EP11794005.6

    申请日：2011-11-30

    Applicant: Danfoss A/S

    Inventor： THYBO, Claus ,  SÜSS, Jürgen

    IPC: F25B41/06

    CPC classification number: F25B41/062 ,  F16K17/02 ,  F16K17/30 ,  F16K31/12 ,  F25B1/10 ,  Y10T137/7787

    Abstract: An expansion valve (4) for a vapour compression system (1), and a vapour compression system comprising such an expansion valve (4) are disclosed. The expansion valve (4) comprises a first valve member (7) and a second valve member (8). The first valve member (7) and the second valve member (8) are arranged movably relative to each other, and the relative position of the first valve member (7) and the second valve member (8) determines an opening degree of the expansion valve (4). The first valve member (7) and/or the second valve member (8) is/are automatically movable in response to changes in a differential pressure across the expansion valve (4), the opening degree of the expansion valve (4) thereby being automatically altered in response to changes in the differential pressure across the expansion valve (4). It is ensured that the opening degree of the expansion valve (4) is automatically adjusted to the actual operating conditions, thereby optimising the efficiency of the vapour compression system (1). Furthermore, this is obtained in a simple manner, without requiring complicated control of the valve (4).

    Abstract translation: 一种用于蒸汽压缩系统的膨胀阀包括第一阀构件和第二阀构件。 第一阀构件和第二阀构件相对于彼此可移动地布置，并且第一阀构件和第二阀构件的相对位置确定膨胀阀的开度。 第一阀构件和/或第二阀构件可以响应于膨胀阀两端的差压的变化而自动移动，膨胀阀的开度由此响应于跨越的膨胀阀的差压的变化自动地改变 膨胀阀。 确保了将膨胀阀的开度自动调整为实际运转条件，从而优化蒸气压缩系统的效率。

    A HEAT EXCHANGER WITH A SUCTION LINE HEAT EXCHANGER
    32.
    发明公开
    A HEAT EXCHANGER WITH A SUCTION LINE HEAT EXCHANGER 审中-公开
    吸线热交换

    公开(公告)号：EP2504655A2

    公开(公告)日：2012-10-03

    申请号：EP10731708.3

    申请日：2010-06-30

    Applicant: Danfoss A/S

    Inventor： THYBO, Claus ,  LARSEN, Lars Finn Sloth ,  MADER, Gunda

    IPC: F28F9/02 ,  F25B39/02 ,  F25B39/04 ,  F25B40/00

    CPC classification number: F28F9/0234 ,  F25B40/00 ,  F25B2400/054 ,  F28F2260/02

    Abstract: A heat exchanger, such as an evaporator (1) or a condenser (17), for a vapour compression system (15) and a vapour compression system (15) with such a heat exchanger are disclosed. The heat exchanger comprises at least two flow tubes arranged fluidly in parallel, an inlet manifold (3) and an outlet manifold (7). Each flow tube fluidly connects the inlet manifold (3) and the outlet manifold (7), and fluid medium is distributed among the flow tubes by the inlet manifold (3). The outlet manifold (7) is provided with a suction line heat exchanger, preferably being fluidly connected in a refrigerant path of the vapour compression system (15) between a condenser (17) and an expansion device (18), in the case that the heat exchanger is an evaporator (1). The suction line heat exchanger is arranged in the outlet manifold (7) in such a manner that direct thermal contact is provided between the refrigerant delivered from the flow tubes and the suction line heat exchanger, the refrigerant, e.g., being sprayed directly onto the suction line heat exchanger. Refrigerant leaving the evaporator (1) is heated, thereby causing evaporation of possible liquid refrigerant. Thereby liquid refrigerant can be allowed to pass through some of the evaporator tubes (2) without risking damage to the compressor (16). Utilisation of the potential refrigeration capacity of the evaporator (1) is improved. Arranging the suction line heat exchanger in the outlet manifold (7) provides a compact design and eliminates the requirement for additional components.

    A METHOD FOR CONTROLLING A VAPOUR COMPRESSION SYSTEM
    33.
    发明授权
    A METHOD FOR CONTROLLING A VAPOUR COMPRESSION SYSTEM 有权
    一种用于控制蒸汽压缩系统

    公开(公告)号：EP2171376B1

    公开(公告)日：2012-02-22

    申请号：EP08758223.5

    申请日：2008-06-11

    Applicant: Danfoss A/S

    Inventor： THYBO, Claus ,  WISNIEWSKI, Rafael

    IPC: F25B5/02 ,  F25B49/02

    CPC classification number: F25B5/02 ,  F25B49/02 ,  F25B2600/21 ,  F25B2600/2511

    Abstract: A method for controlling a vapour compression system, such as a refrigeration system, preferably an air condition system, comprising at least two evaporators. While monitoring a superheat (SH) at a common outlet for the evaporators, the amount of available refrigerant is controlled in response to the SH and in order to obtain an optimum SH value. The available refrigerant is distributed among the evaporators in accordance with a distribution key. The distribution key is preferably obtained while taking individual consideration to operating conditions for each of the evaporators into account. Thereby the vapour compression system can be operated in such a way that each of the evaporators is operated in an optimal manner, and in such a way that the system in general is operated in an optimal manner.

    A METHOD FOR CONTROLLING TEMPERATURE IN A REFRIGERATION SYSTEM
    34.
    发明公开
    A METHOD FOR CONTROLLING TEMPERATURE IN A REFRIGERATION SYSTEM 有权
    方法控制温度在冷却系统

    公开(公告)号：EP1831627A2

    公开(公告)日：2007-09-12

    申请号：EP05818754.3

    申请日：2005-12-14

    Applicant: Danfoss A/S

    Inventor： THYBO, Claus ,  PLOUG, Ole

    IPC: F25D29/00 ,  F25D21/00

    CPC classification number: F25D21/006 ,  F25D29/00 ,  F25D2500/04 ,  F25D2700/12 ,  F25D2700/16

    Abstract: A method for controlling a temperature in a refrigeration system using a quality decay value expressing an expected decay rate in quality of the products being refrigerated, and which depends on the temperature of air present in the refrigeration system. The quality decay value is obtained using a mathematical model reflecting one or more physical and/or biological processes in the products. Prevents or reduces the quality degradation of the products in terms of shelf life, appearance or tastiness. Furthermore, a method for controlling the temperature in such a way that effects of scheduled events, such as temperature increase during defrosts, can be compensated prior to the event.

    A METHOD FOR CONTROLLING A SUPPLY OF REFRIGERANT TO AN EVAPORATOR
    40.
    发明公开
    A METHOD FOR CONTROLLING A SUPPLY OF REFRIGERANT TO AN EVAPORATOR 有权
    VERFAHREN ZUR STEUERUNG EINERKÜHLMITTELZUFÜHRUNGZU EINEM VERDAMPFER

    公开(公告)号：EP2630422A1

    公开(公告)日：2013-08-28

    申请号：EP11776069.4

    申请日：2011-10-19

    Applicant: Danfoss A/S

    Inventor： IZADI-ZAMANABADI, Roozbeh ,  LARSEN, Lars, Finn, Sloth ,  THYBO, Claus

    IPC: F25B41/06

    CPC classification number: F25B49/02 ,  F25B41/062 ,  F25B2500/19 ,  F25B2600/21

    Abstract: A method for controlling a supply of refrigerant to an evaporator (5) of a vapor compression system (1), such as a refrigeration system, an air condition system or a heat pump, is disclosed. The vapor compression system (1) comprises an evaporator (5), a compressor (2), a condenser (3) and an expansion device (4) arranged in a refrigerant circuit. The method comprises the steps of: Actuating a component, such as an expansion valve (4), a fan or a compressor (2), of the vapor compression system (1) in such a manner that a dry zone in the evaporator (5) is changed; measuring a temperature signal representing a temperature of refrigerant leaving the evaporator (5); analyzing the measured temperature signal, e.g. including deriving a rate of change signal; determining a temperature value where a gain of a transfer function between the actuated component and the measured temperature drops from a maximum value to a minimum value, in a decreasing temperature direction; defining the determined temperature value as corresponding to a zero superheat (SH=0) value of refrigerant leaving the evaporator (5), and controlling a supply of refrigerant to the evaporator (5) in accordance with the defined SH=0 temperature value, and on the basis of the measured temperature signal. The method steps may be repeated at certain time intervals in order to provide updated determinations of the SH=0 temperature value. The method allows the SH=0 point to be determined purely on the basis of the measured temperature signal. Subsequently, the supply of refrigerant to the evaporator (5) can be controlled purely on the basis of the measured temperature signal.

    Abstract translation: 公开了一种用于控制向蒸气压缩系统（1）的蒸发器（5）供应制冷剂的方法，例如制冷系统，空调系统或热泵。 蒸气压缩系统（1）包括布置在制冷剂回路中的蒸发器（5），压缩机（2），冷凝器（3）和膨胀装置（4）。 该方法包括以下步骤：以蒸发器（5）中的干燥区域的方式驱动蒸气压缩系统（1）的部件，例如膨胀阀（4），风扇或压缩机（2） ）改变了 测量表示离开蒸发器（5）的制冷剂的温度的温度信号; 分析测量的温度信号，例如 包括导出变化率信号; 确定温度值，其中所述致动部件和所测量的温度之间的传递函数的增益在温度降低方向上从最大值下降到最小值; 将所确定的温度值定义为对应于离开蒸发器（5）的制冷剂的零过热（SH = 0）值，以及根据所定义的SH = 0温度值控制向蒸发器（5）供应的制冷剂;以及 在测量温度信号的基础上。 可以以特定时间间隔重复方法步骤，以便提供更新的SH = 0温度值的确定。 该方法允许基于测量的温度信号纯粹地确定SH = 0点。 随后，可以纯粹基于测量的温度信号来控制向蒸发器（5）供应制冷剂。

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