公开(公告)号：EP3365618A1

公开(公告)日：2018-08-29

申请号：EP16781477.1

申请日：2016-10-14

Applicant: Danfoss A/S

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

IPC: F25B49/02 ,  F25B41/00 ,  F25B9/08

CPC classification number: F25B49/02 ,  F25B9/08 ,  F25B41/00 ,  F25B2341/0012 ,  F25B2341/0661 ,  F25B2400/075 ,  F25B2400/13 ,  F25B2400/16 ,  F25B2400/23 ,  F25B2500/19 ,  F25B2500/31 ,  F25B2600/2501 ,  F25B2600/2513 ,  F25B2700/19

Abstract: A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising at least one expansion device (8) and at least one evaporator (9). For each expansion device (8), an opening degree of the expansion device (8) is obtained, and a representative opening degree, ODrep, is identified based on the obtained opening degree(s) of the expansion device(s) (8). The representative opening degree could be a maximum opening degree, ODmax, being the largest among the obtained opening degrees. The representative opening degree, ODrep, is compared to a predefined target opening degree, ODtarget, and a minimum setpoint value, SPrec, for a pressure prevailing inside a receiver (7), is calculated or adjusted, based on the comparison. The vapour compression system (1) is controlled to obtain a pressure inside the receiver (7) which is equal to or higher than the calculated or adjusted minimum setpoint value, SPrec.

公开(公告)号：EP3334985A1

公开(公告)日：2018-06-20

申请号：EP16733622.1

申请日：2016-07-01

Applicant: Danfoss A/S

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

IPC: F25B5/02 ,  F25B41/00 ,  F25B49/02

CPC classification number: F25B41/062 ,  F22B3/045 ,  F25B41/00 ,  F25B43/006 ,  F25B49/02 ,  F25B49/027 ,  F25B2341/0012 ,  F25B2341/0013 ,  F25B2341/0015 ,  F25B2400/0751

Abstract: A vapour compression system (1) comprising at least two evaporator groups (5a, 5b, 5c), each evaporator group (5a, 5b, 5c) comprising an ejector unit (7a, 7b, 7c), at least one evaporator (9a, 9b, 9c) and a flow control device (8a, 8b, 8c) controlling a flow of refrigerant to the at least one evaporator (9a, 9b, 9c). For each evaporator group (5a, 5b, 5c) the outlet of the evaporator (9a, 9b, 9c) is connected to a secondary inlet (12a, 12b, 12c) of the corresponding ejector unit (7a, 7b, 7c). The vapour compression system (1) can be controlled in an energy efficient and stable manner. A method for controlling the vapour compression system (1) is also disclosed.

公开(公告)号：EP3201539A1

公开(公告)日：2017-08-09

申请号：EP15753368.8

申请日：2015-08-21

Applicant: Danfoss A/S

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

IPC: F25B49/00

CPC classification number: F25B45/00 ,  F25B49/00 ,  F25B49/005 ,  F25B49/02 ,  F25B2400/16 ,  F25B2400/19 ,  F25B2500/19 ,  F25B2500/222 ,  F25B2700/04 ,  G01K13/00

Abstract: A level sensor is configured to provide a receiver level indicating an amount of the refrigerant present in the receiver and a level model provides a heat rejecting heat exchanger estimate indicating an amount of the refrigerant present in the heat rejecting heat exchanger based on a temperature of the refrigerant. From the sensor and the model, a loss of refrigerant from the RVCS system is estimated.

Abstract translation: 液位传感器被配置为提供指示存在于接收器中的制冷剂的量的接收器水平，并且水平模型提供排热换热器估计，其指示存在于排热换热器中的制冷剂的量基于 制冷剂。 从传感器和模型估计RVCS系统的制冷剂损失。

公开(公告)号：EP2817685B1

公开(公告)日：2016-04-20

申请号：EP13707100.7

申请日：2013-02-16

Applicant: Danfoss A/S

Inventor： MADSEN, Kenneth Bang ,  NIELSEN, Leif Skovvang ,  SCHMIDT, Flemming Morten ,  SCHMIDT, Frede

IPC: G05B19/05

CPC classification number: F25B49/02 ,  G05B15/02 ,  G05B19/056

Abstract: The invention relates to a method for configuring, on a control unit, operating parameters of a plurality of devices of a refrigeration system. A user selects on the control unit, among the plurality of devices of the refrigeration system, a first device to configure. Information of valid configurable operating parameters of the first device is provided on the control unit. The user selects at least one of the valid configurable operating parameters of the first device, thereby configuring the first device. Information stored about operating parameters of other devices of the refrigeration system, based on the configuration of the first device, is then provided on the control unit. Finally, the user confirms, on the control unit, one or more operating parameters of one or more of the other devices, thereby configuring the one or more other devices. The invention also relates to a control unit and a refrigeration system.

公开(公告)号：EP0811136B1

公开(公告)日：2002-10-02

申请号：EP96903930.4

申请日：1996-02-19

Applicant: Danfoss A/S

Inventor： SCHMIDT, Frede

IPC: F25B41/06 ,  F25B49/02 ,  G05D23/20

CPC classification number: F25B41/062 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/21174 ,  F25B2700/21175 ,  G05D23/1919

公开(公告)号：EP0954731A1

公开(公告)日：1999-11-10

申请号：EP97912076.0

申请日：1997-11-17

Applicant: Danfoss A/S

Inventor： SCHMIDT, Frede ,  JENSEN, Kenn, Sonder

IPC: F25B41

CPC classification number: F25B41/062 ,  F25B2341/0681 ,  F25B2500/05 ,  F25B2600/21

Abstract: A process for controlling a refrigeration system, as well as the refrigeration system and a new expansion valve for the refrigeration system. An electronic regulator is used to operate a sensor system having a device for applying heat power to the sensor system in direct dependence on sensed superheat of the refrigerant leaving the evaporator. By locating the sensing system in communication with liquid refrigerant upstream of the evaporator, heat transfer to the liquid refrigerant is utilized for operation of the sensor system rather than heat transfer to the superheat, resulting in a far more stable and efficient refrigeration control.

Abstract translation: PCT No.PCT / EP97 / 06357 371日期1999年5月19日 102（e）日期1999年5月19日PCT 1997年11月14日PCT PCT。 第WO98 / 22763号公报 日期1998年5月28日在使用膨胀阀（4）调节制冷系统（1）的方法中，调节构件的一侧由制冷剂在蒸发器侧的压力被按压，并且调节构件的另一侧被按压 传感器系统（22）的蒸汽压力由传感器温度由制冷剂饱和温度和加热元件（27）提供的热量决定。 供热根据测量值（过热或液位）进行调节。 还公开了以这种方式调节的制冷系统（1）和作为这种系统的主要部件的膨胀阀（4）。 因此可以获得改进的，经济的和普遍适用的调节。

公开(公告)号：EP0788592B1

公开(公告)日：1999-04-21

申请号：EP95935868.0

申请日：1995-11-02

Applicant: Danfoss A/S

Inventor： BENDTSEN, Christian ,  SCHMIDT, Frede

IPC: F25D21/00

CPC classification number: F25D21/008 ,  F25B5/02 ,  F25B2400/22 ,  F25D17/02

Abstract: A method for defrosting a refrigeration system (38) makes provison for partial defrosting of the cooling surface (39) to be carried out at relatively short intervals, and for full defrosting to be carried out at longer intervals. To that end an associated control unit (41) has four timers (44 to 47) which determine the switching on and switching off times of the defrosting processes. In this manner the interval between successive full defrostings can be considerably increased.

公开(公告)号：EP0776449A1

公开(公告)日：1997-06-04

申请号：EP95925746.0

申请日：1995-07-07

Applicant: Danfoss A/S

Inventor： SCHMIDT, Frede

IPC: F25B5 ,  F25B41 ,  F25B49

CPC classification number: F25B41/062 ,  F25B5/02 ,  F25B49/022 ,  F25B2341/065 ,  F25B2400/075 ,  F25B2400/22 ,  F25B2600/21 ,  F25B2600/2513 ,  Y02B30/72

Abstract: A control arrangement for cooling of apparatus comprising a compressor (1), a condenser (2) and at least one branch (3) with an expansion valve (4) and an evaporator (5) in series, contains a controller (6), a superheat temperature measuring device (8) and an ambient temperature sensor (7). The controller (6) controls the expansion valve (4) for maintaining the superheat temperature substantially at the desired value. The flow of coolant to the evaporator (5) is controlled by the signal from the temperature sensor (7) for maintaining the ambient temperature constant. The controller (6) operates continuously and in two operating modes in which in the first mode the superheat temperature is controlled to the maximum admissible state of fill of liquid coolant in the evaporator (5), and is switchable to a second mode in which the state of fill of liquid coolant is controlled by the expansion valve (4).

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.

公开(公告)号：EP3365620B1

公开(公告)日：2019-08-21

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: F25B5/02 ,  F25B6/02 ,  F25B9/08 ,  F25B49/02