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    Method for controlling gas pressure in cooling plant
    61.
    发明授权
    Method for controlling gas pressure in cooling plant 有权

    公开(公告)号：US09885509B2

    公开(公告)日：2018-02-06

    申请号：US14349749

    申请日：2012-10-05

    Applicant: Danfoss A/S

    Inventor： Kenneth Bank Madsen ,  Frede Schmidt

    IPC: F25B1/00 ,  F25B49/00 ,  F25B49/02 ,  F25B39/04

    CPC classification number: F25B49/027 ,  F25B39/04 ,  F25B49/005 ,  F25B2309/061 ,  F25B2313/0313 ,  F25B2600/17 ,  F25B2700/195 ,  F25B2700/2102

    Abstract: A method for monitoring gas pressure in a heat rejecting heat exchanger in a cooling circuit is disclosed. The present capacity of one or more compressors in the cooling circuit compared to a maximum capacity of the one or more compressors is established. If the present capacity of the one or more compressors is at least at a level corresponding to a pre-set percentage of the maximum capacity, a period of time elapsed from a point in time where the compressor capacity reached said level is established. If the established period of time has a duration which is longer than a pre-set period of time, then it is concluding that the cooling medium is in a gas loop operational mode, allowing an operator or a controller to adjust operation of the cooling plant such that the cooling medium is brought out of the gas loop operational mode.

    Method for controlling a refrigerator, a control unit and a refrigerator
    63.
    发明授权
    Method for controlling a refrigerator, a control unit and a refrigerator 有权

    公开(公告)号：US09829228B2

    公开(公告)日：2017-11-28

    申请号：US14232303

    申请日：2012-07-13

    Applicant: Gero C. Langenberg ,  Hans Erik Fogh

    Inventor： Gero C. Langenberg ,  Hans Erik Fogh

    IPC: F25B49/00 ,  F25D29/00

    Abstract: The invention relates to a method for controlling a refrigerator. The method comprises the steps of establishing a time interval of a certain duration, a first use of the refrigerator starting a first time interval, starting a subsequent time interval based on the start of the first time interval, and subtracted a time difference. The subsequent time interval subtracted a time difference is being used for starting a cool-down period of the subsequent time interval. The invention also relates to a control unit for the refrigerator and to a refrigerator with such control unit.

    Magnetic valve with a one piece housing
    67.
    发明授权
    Magnetic valve with a one piece housing 有权

    公开(公告)号：US09683673B2

    公开(公告)日：2017-06-20

    申请号：US14437731

    申请日：2013-09-11

    Applicant: Danfoss A/S

    Inventor： Kristjan Arnor Gretarsson ,  Michael Birkelund

    IPC: F16K31/06 ,  F16K27/02

    CPC classification number: F16K31/06 ,  F16K27/02 ,  F16K27/029 ,  F16K31/0665 ,  Y10T137/5987

    Abstract: A magnetic valve (1) in which a valve housing (2), an armature tube (3), an inlet connection (4) and an outlet connection (5) form a single valve part is provided. An armature (9) made from a soft magnetic material is arranged movably inside the armature tube (3). A coil (16) is arranged externally to the armature tube (3) in such a manner that the armature tube (3) and the armature (9) are arranged inside the windings of the coil (16). A valve closing element (10) is connected to the armature (9) and is movable between a position in which it abuts a valve seat (8) and positions in which it does not abut the valve seat 8, thereby closing and opening the valve (1). In one embodiment, the flow path through the valve (1) from the inlet opening (6) to the outlet opening (7) does not pass through the windings of the coil (16). In another embodiment, the armature tube (3) comprises a closed end part (3a).

    Method of coordinating operation of compressors
    68.
    发明授权
    Method of coordinating operation of compressors 有权
    协调压缩机运行的方法

    公开(公告)号：US09551335B2

    公开(公告)日：2017-01-24

    申请号：US14349765

    申请日：2012-10-05

    Applicant: Danfoss A/S

    Inventor： Jan Prins

    IPC: F04B41/06 ,  F25B1/10 ,  F25B7/00 ,  F25B49/02

    CPC classification number: F04B41/06 ,  F25B1/10 ,  F25B7/00 ,  F25B49/022

    Abstract: A method for coordinating operation between at least two groups of compressors in a cooling circuit is disclosed. A first group of compressors forms part of a low temperature (LT) part of the cooling circuit and a second group of compressors forms part of a high temperature (MT) part of the cooling circuit. Each of the compressor groups comprises one or more compressors, and each of the compressor groups comprises a controller, the controllers being capable of exchanging signals. In the case that the LT compressor group needs one or more of the LT compressors to start operation, it is investigated whether or not one or more of the MT compressors is/are operating. If this is the case, one or more of the LT compressors is/are allowed to start operation. If it is not the case, the suction pressure in the MT part of the cooling circuit is established, e.g. measured, and compared to a lower and an upper limit of a neutral pressure zone, said neutral pressure zone lying within an operating pressure zone of the MT part of the cooling circuit. Finally, the MT compressors and the LT compressors are operated based on the comparing step. The cooling system may be a cascade system or a booster system.

    Abstract translation: 公开了一种用于协调冷却回路中的至少两组压缩机之间的操作的方法。 第一组压缩机形成冷却回路的低温（LT）部分的一部分，第二组压缩机形成冷却回路的高温（MT）部分的一部分。 每个压缩机组包括一个或多个压缩机，并且每个压缩机组包括控制器，控制器能够交换信号。 在LT压缩机组需要一台或多台LT压缩机开始运行的情况下，对MT压缩机中的一台或多台是否正在运行进行研究。 如果是这种情况，则允许一个或多个LT压缩机开始运行。 如果不是这样，则建立冷却回路的MT部分中的吸入压力，例如， 测量并与中性压力区域的下限和上限进行比较，所述中性压力区域位于冷却回路的MT部分的工作压力区域内。 最后，基于比较步骤操作MT压缩机和LT压缩机。 冷却系统可以是级联系统或增压系统。

    Method for adjusting several parallel connected heat exchangers
    69.
    发明授权
    Method for adjusting several parallel connected heat exchangers 有权
    用于调节多个并联的热交换器的方法

    公开(公告)号：US09488379B2

    公开(公告)日：2016-11-08

    申请号：US13487799

    申请日：2012-06-04

    Applicant: Joergen Seerup ,  Niels Gregersen

    Inventor： Joergen Seerup ,  Niels Gregersen

    IPC: F24D19/10 ,  F24D3/12 ,  G05D23/19

    CPC classification number: F24D19/1009 ,  F24D3/12 ,  F24D19/1048 ,  F28F2210/10 ,  G05D23/1934 ,  Y02B30/762

    Abstract: A method is provided for adjusting several parallel connected heat exchangers supplied with a coolant medium. The aim of the invention is to simplify the adjustment. For this purpose, the method consists in a) determining a specific value of heat requirement for each heat exchanger in a predetermined time period; b) comparing the specific values of all heat exchangers therebetween and c) in modifying the adjustment of the heat exchanger having the lowest specific value of heat requirement in such a way that the heat requirement thereof is increased.

    Abstract translation: 提供了一种用于调节供应有冷却剂介质的几个并联连接的热交换器的方法。 本发明的目的是简化调整。 为此，该方法包括：a）在预定时间段内确定每个热交换器的热需求的特定值; b）比较其间的所有热交换器的具体值，以及c）改变具有最低热需求特定值的热交换器的调节，使得热需求增加。

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