公开(公告)号：EP3545241A1

公开(公告)日：2019-10-02

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

Abstract: A method for controlling a vapour compression system (1) is disclosed. A mass flow of refrigerant along a part of the refrigerant path is estimated, based on measurements performed by one or more pressure sensors (10, 12, 13) for measuring a refrigerant pressure at selected positions along the refrigerant path and one or more temperature sensors (11, 14) for measuring a refrigerant temperature at selected positions along the refrigerant path. A refrigerant pressure or a refrigerant temperature at a selected position a pressure sensor (10, 12, 13) or temperature sensor (11, 14) along the refrigerant path is derived, based on the estimated mass flow. The vapour compression system (1) is allowed to continue operating, even if a sensor (10, 11, 12, 13, 14) is malfunctioning or unreliable.

公开(公告)号：EP3411642A1

公开(公告)日：2018-12-12

申请号：EP17702877.6

申请日：2017-02-03

Applicant: Danfoss A/S

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

IPC: F25B49/02

CPC classification number: F25B49/027 ,  F24F11/77 ,  F24F2140/20 ,  F25B2500/12 ,  F25B2500/19 ,  F25B2600/111 ,  F25B2700/2103 ,  F25B2700/2104 ,  F25B2700/21163 ,  Y02B30/743

Abstract: A method for controlling a fan (6) of a vapour compression system (1) is disclosed, the fan (6) being arranged to provide a secondary fluid flow across a heat rejecting heat exchanger (3). A temperature difference, ΔΤ= Tout-Tamb, between a temperature, Tout, of refrigerant leaving the heat rejecting heat exchanger (3) and a temperature, Tamb, of ambient air of the heat rejecting heat exchanger (3) is established. A setpoint value, ΔTsetp, for the temperature difference, ΔΤ, is obtained, the setpoint value, ΔTsetp, being dependent on the fan speed of the fan (6) in such a manner that the setpoint value, ΔTsetp, increases as the fan speed increases. The fan speed of the fan (6) is controlled in order to control the temperature difference, ΔΤ, in accordance with the obtained setpoint value, ΔTsetp.

公开(公告)号：EP3365619A1

公开(公告)日：2018-08-29

申请号：EP16781479.7

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

CPC classification number: F25B49/022 ,  F25B1/08 ,  F25B9/08 ,  F25B41/00 ,  F25B2341/0012 ,  F25B2341/0661 ,  F25B2400/075 ,  F25B2400/13 ,  F25B2400/16 ,  F25B2400/23 ,  F25B2500/29 ,  F25B2500/31 ,  F25B2700/19 ,  F25B2700/197 ,  F25B2700/21163

Abstract: A method for controlling a vapour compression system (1) comprising an ejector (6) is disclosed. In the case that a pressure difference between a pressure prevailing in the receiver (7) and a pressure of refrigerant leaving the evaporator (9) decreases below a first lower threshold value, the pressure of refrigerant leaving the heat rejecting heat exchanger (5) is kept at a level which is slightly higher than the pressure level providing optimal COP. Thereby the ejector (6) can operate at lower ambient temperatures, and the energy efficiency of the vapour compression system (1) is improved.

公开(公告)号：EP3545242A1

公开(公告)日：2019-10-02

申请号：EP17797958.0

申请日：2017-11-15

Applicant: Danfoss A/S

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

IPC: F25B49/02 ,  F25B41/00

公开(公告)号：EP3365619B1

公开(公告)日：2019-08-21

申请号：EP16781479.7

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 ,  F25B1/08 ,  F25B9/08

公开(公告)号：EP3303944A1

公开(公告)日：2018-04-11

申请号：EP16725122.2

申请日：2016-05-25

Applicant: Danfoss A/S

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

IPC: F25B29/00 ,  F25B49/02 ,  F25B40/04 ,  F25B1/10

CPC classification number: F25B29/003 ,  F25B1/10 ,  F25B40/04 ,  F25B49/022 ,  F25B2400/075 ,  F25B2400/13 ,  F25B2400/23 ,  Y02B30/52

Abstract: A method for operating a vapour compression system (1) comprising a heat recovery heat exchanger (4) is disclosed. The heat recovery system requests a required level of recovered heat to be provided by the heat recovery heat exchanger (4) to the heat recovery system, generates a signal indicating the required level of recovered heat, and supplies the generated signal to a control unit of the vapour compression system (1). A setpoint value for at least one control parameter of the vapour compression system (1) is calculated, based on the generated signal, and the vapour compression system (1) is operated in accordance with the calculated setpoint value(s).