公开(公告)号：WO2013156027A1

公开(公告)日：2013-10-24

申请号：PCT/DK2013/000023

申请日：2013-03-19

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABAD, Roozbeh ,  ALNOR, Harald

IPC: F25B41/06

CPC classification number: F25B49/02 ,  F25B41/043 ,  F25B41/062 ,  F25B2600/01 ,  F25B2600/2513 ,  F25B2700/2104 ,  F25B2700/21151 ,  F25B2700/21173

Abstract: The invention discloses a controller for a vapour compression system for cooling a refrigerated space. The system comprises a circuit for circulation of a refrigerant between a compressor (2), a condenser (3), and an evaporator (4). An expansion valve (5) controls a flow of the refrigerant into the evaporator (4) and thereby cooling of the refrigerated space. The control system is adapted to control the expansion valve (5) based on a first temperature (Tl) in the circuit between the evaporator (4) and the compressor (2) and a second temperature (T2) determined in the refrigerated space.

Abstract translation: 本发明公开了一种用于冷却冷藏空间的蒸汽压缩系统的控制器。 该系统包括用于在压缩机（2），冷凝器（3）和蒸发器（4）之间循环制冷剂的回路。 膨胀阀（5）控制制冷剂进入蒸发器（4）的流动，从而冷却冷藏空间。 控制系统适于基于蒸发器（4）和压缩机（2）之间的回路中的第一温度（T1）和在冷藏空间中确定的第二温度（T2）来控制膨胀阀（5）。

公开(公告)号：WO2009039850A1

公开(公告)日：2009-04-02

申请号：PCT/DK2008/000333

申请日：2008-09-24

Applicant: DANFOSS A/S ,  ALNOR, Harald ,  BENDTSEN, Christian

Inventor： ALNOR, Harald ,  BENDTSEN, Christian

IPC: F25B49/02

CPC classification number: F25B41/062 ,  F25B49/022 ,  F25B2500/18 ,  F25B2500/19 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/21172 ,  F25B2700/21173 ,  F25B2700/21174 ,  F25B2700/21175

Abstract: A method for controlling an opening degree of a valve arranged in a vapour compression system, such as a refrigeration system or a heat pump. The vapour compression system comprises a compressor, a condenser, a valve and an evaporator arranged in a refrigerant flow path. According to a first aspect, the method comprises the steps of obtaining a superheat value for the system and comparing it to a reference superheat value, determining a maximum opening degree of the valve, and controlling the opening degree of the valve in accordance with the comparing step, and in such a manner that the opening degree does not exceed the maximum opening degree. The maximum opening degree is determined dynamically as a function of a mean temperature difference across the evaporator. Thereby the it is ensured that it is possible to open the valve as much as possible, while keeping the operation of the system safe in the sense that the risk that liquid refrigerant is allowed to pass through the evaporator is minimised due to the maximum opening degree. According to a second aspect, an adjustment value is calculated on the basis of the superheat value, the reference superheat value and a generated control signal. Thereby a faster response to changes in the operating conditions for the vapour compression system is obtained.

Abstract translation: 一种用于控制配置在诸如制冷系统或热泵的蒸气压缩系统中的阀的开度的方法。 蒸气压缩系统包括布置在制冷剂流动路径中的压缩机，冷凝器，阀和蒸发器。 根据第一方面，所述方法包括以下步骤：获得所述系统的过热值并将其与参考过热值进行比较，确定所述阀的最大开度，以及根据所述比较来控制所述阀的开度 并且以使开度不超过最大开度的方式。 最大开度作为蒸发器两端平均温度差的函数动态地确定。 从而确保尽可能地打开阀，同时保持系统的操作安全，因为允许液体制冷剂通过蒸发器的风险由于最大开度而被最小化 。 根据第二方面，基于过热值，参考过热值和产生的控制信号来计算调整值。 从而获得对于蒸汽压缩系统的操作条件的变化的更快响应。