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

公开(公告)号：EP3371523A1

公开(公告)日：2018-09-12

申请号：EP16788142.4

申请日：2016-10-31

Applicant: Danfoss A/S

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

IPC: F25B1/10 ,  F25B9/08 ,  F25B41/04

Abstract: A method for operating a compressor unit (2) comprising one or more compressors (8, 9, 10) is disclosed, the compressor unit (2) being arranged in a vapour compression system (1). Two or more options for distributing the available compressor capacity of the compressor unit (2) between being connected to a high pressure suction line (11) and to a medium pressure suction line (13) are defined. For each option, an expected impact on one or more operating parameters of the vapour compression system (1), resulting from distributing the available compressor capacity according to the option, is predicted. An option is selected, based on the predicted expected impact for the options, and based on current operating demands of the vapour compression system (1), and the available compressor capacity is distributed according to the selected option, e.g. by means of settings of one or more valve arrangements (14, 15).

公开(公告)号：EP3365620A1

公开(公告)日：2018-08-29

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: F25B49/02

CPC classification number: F25B49/022 ,  F25B5/02 ,  F25B6/02 ,  F25B9/08 ,  F25B2341/0012 ,  F25B2400/075 ,  F25B2400/16 ,  F25B2400/23 ,  F25B2500/28

Abstract: A method for controlling a vapour compression system (1) is disclosed. The vapour compression system (1) comprises an ejector (6) and a liquid separating device (10) arranged in a suction line. At least one evaporator (9) is allowed to be operated in a flooded state. A flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) is detected, and it is determined whether or not the flow rate is sufficient to remove liquid refrigerant produced by the evaporator(s) (9) being allowed to be operated in a flooded state from the liquid separating device (10). In the case that it is determined that the flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) is insufficient to remove liquid refrigerant produced by the evaporator(s) (9), the flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) is increased, and/or a flow rate of liquid refrigerant from the evaporator(s) (9) to the liquid separating device (10) is decreased.

公开(公告)号：EP2839226A1

公开(公告)日：2015-02-25

申请号：EP13725269.8

申请日：2013-04-19

Applicant: Danfoss A/S

Inventor： PRINS, Jan ,  SCHMIDT, Frede

IPC: F25B49/02

CPC classification number: F25B49/02 ,  F25B49/027 ,  F25B2313/0294 ,  F25B2600/11 ,  F25B2600/111 ,  F25B2700/172 ,  F25B2700/2103 ,  F25B2700/2106 ,  F25B2700/21163 ,  F25D17/06 ,  Y02B30/743

Abstract: A method of controlling a fan of a vapour compression system is disclosed. The vapour compression system comprises a compressor, a heat rejecting heat exchanger, e.g. in the form of a gas cooler or a condenser, an expansion device and an evaporator arranged in a refrigerant circuit. The fan is arranged to provide a secondary fluid flow across the heat rejecting heat exchanger, e.g. in the form of an air flow. The method comprises the steps of establishing a temperature, T
1 , of refrigerant leaving the heat rejecting heat exchanger, establishing a temperature, T
2 , of ambient air of the heat rejecting heat exchanger, and deriving a temperature difference, ΔΤ=Τ
1 -Τ
2 , between the temperature (T
1 ) of refrigerant leaving the heat rejecting heat exchanger and the temperature (T
2 ) of ambient air of the heat rejecting heat exchanger. The temperature difference, ΔΤ, is compared to a first threshold value and to a second threshold value, the second threshold value being smaller than or equal to the first threshold value, and the rotational speed of the fan is controlled on the basis of the comparing step. The method allows the electrical energy consumption of the fan to be reduced without risking instability of the vapour compression system.

Abstract translation: 一种控制蒸气压缩系统的风扇的方法是游离缺失盘。 蒸汽压缩系统包括压缩机，排热换热器，E.G. 在气体冷却器或冷凝器，膨胀装置以及在制冷剂回路布置蒸发器的形式。 风扇被布置成提供穿过热量的次级流体流排热换热器，E.G. 在空气流的形式。 该方法包括建立一个温度的步骤，T 1，的制冷剂在离开排热换热器，建立温度，T 2，热的环境空气的排热换热器，并且导出的温度差，“T = T 1 T 2，温度的制冷剂（T 1）在离开排热换热器的环境空气的排热换热器和所述温度（T 2）之间。 的温度差，“T，被相对于第一阈值和第二阈值，第二阈值是小于或等于第一阈值，和所述风扇的旋转速度的基础上控制 比较步骤。 该方法允许在不危及蒸汽压缩系统的不稳定性以能够降低风扇的电能消耗。

公开(公告)号：EP3545243B1

公开(公告)日：2020-07-29

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

公开(公告)号：EP3545241B1

公开(公告)日：2020-07-29

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

公开(公告)号：EP3628940A1

公开(公告)日：2020-04-01

申请号：EP18196410.7

申请日：2018-09-25

Applicant: Danfoss A/S

Inventor： PRINS, Jan ,  LARSEN, Lars Finn Sloth

IPC: F25B1/10 ,  F25B49/02

Abstract: A method for controlling a vapour compression system (1) comprising a compressor unit (2) comprising at least two compressors (3, 12), a heat rejecting heat exchanger (4), a receiver (6), an expansion device (7) and an evaporator (8) arranged in a refrigerant path is disclosed. At least one of the compressors is a main compressor (3) being fluidly connected to an outlet of the evaporator (8) and at least one of the compressors is a receiver compressor (12) being fluidly connected to a gaseous outlet (10) of the receiver (6). A flow of vapour entering the receiver (6), such as a mass flow of vapour entering the receiver (6) is estimated and compared to a first threshold value. In the case that the estimated flow is above the first threshold value, a pressure prevailing inside the receiver (6) is controlled by operating the receiver compressor (12).

公开(公告)号：EP3601907A1

公开(公告)日：2020-02-05

申请号：EP18715561.9

申请日：2018-03-23

Applicant: Danfoss A/S

Inventor： PRINS, Jan ,  MADSEN, Kenneth Bank ,  LARSEN, Lars Finn Sloth

IPC: F25B49/02 ,  F25B1/10 ,  F25B9/08 ,  F25B41/04 ,  F25B5/02

公开(公告)号：EP3589900A1

公开(公告)日：2020-01-08

申请号：EP17818145.9

申请日：2017-12-20

Applicant: Danfoss A/S

Inventor： LARSEN, Lars Finn Sloth ,  PRINS, Jan ,  MADSEN, Kenneth Bank

IPC: F25B1/10 ,  F25B49/02 ,  F25B41/00 ,  F25B41/04 ,  F25B5/02