中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

67 records (took 0.025 seconds)

    A METHOD FOR CONTROLLING A CHILLER SYSTEM
    52.
    发明授权
    A METHOD FOR CONTROLLING A CHILLER SYSTEM 有权
    一种控制冷却器系统的方法

    公开(公告)号：EP2890940B1

    公开(公告)日：2018-01-10

    申请号：EP13742152.5

    申请日：2013-07-12

    Applicant: Danfoss A/S

    Inventor： PRINS, Jan

    IPC: F25B49/02 ,  G05B13/02

    CPC classification number: F25B25/005 ,  F24F3/06 ,  F24F11/63 ,  F24F11/83 ,  F24F11/85 ,  F25B49/02 ,  F25B2500/19 ,  F25B2600/0253 ,  F25B2600/13 ,  F25B2700/21172 ,  F25B2700/21173 ,  G05D23/1919 ,  Y02B30/741 ,  Y02B30/745

    Abstract: A method for controlling a chiller system, the chiller system comprising a primary side in the form of a vapour compression system, and a secondary side, is disclosed. The secondary side comprises a variable speed pump for providing a secondary fluid flow through the evaporator of the primary side in such a manner that heat exchange takes place between refrigerant of the primary side and fluid of the secondary side in the evaporator, the secondary side further comprising a temperature sensor arranged in the secondary fluid flow. The method comprises the steps of monitoring a temperature of the secondary fluid flow by means of the temperature sensor, and controlling the compressor capacity and the speed of the variable speed pump on the basis of the monitored temperature, and in order to obtain a predetermined setpoint temperature, in such a manner that the closed loop gain of the chiller system, K=Kp·Ke, where Kp is the gain of the compressor capacity controller and Ke is the gain of the evaporator, is kept substantially constant.

    A METHOD FOR CONTROLLING A VARIABLE CAPACITY EJECTOR UNIT
    53.
    发明公开
    A METHOD FOR CONTROLLING A VARIABLE CAPACITY EJECTOR UNIT 审中-公开
    一种控制可变容量推杆装置的方法

    公开(公告)号：EP3189288A1

    公开(公告)日：2017-07-12

    申请号：EP15730787.7

    申请日：2015-06-23

    Applicant: Danfoss A/S

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

    IPC: F25B41/00 ,  F25B41/04

    CPC classification number: F25B41/00 ,  F25B41/04 ,  F25B2341/0012 ,  F25B2341/0013 ,  F25B2341/0015 ,  F25B2600/17 ,  F25B2600/2503 ,  F25B2700/195 ,  F25B2700/21163

    Abstract: A method for controlling a variable capacity ejector unit (7) arranged in a refrigeration system (1) is disclosed. An ejector control signal for the ejector unit (7) is generated, based on an obtained temperature and an obtained pressure of refrigerant leaving a heat rejecting heat exchanger (3), or on the basis of a high pressure valve control signal for controlling an opening degree of a high pressure valve (6) arranged fluidly in parallel with the ejector unit (7). The ejector control signal indicates whether the capacity of the ejector unit (7) should be increased, decreased or maintained. The capacity of the ejector unit (7) is controlled in accordance with the generated ejector control signal. The power consumption of the refrigeration system (1) is reduced, while the pressure of the refrigerant leaving the heat rejecting heat exchanger (3) is maintained at an acceptable level.

    Abstract translation: 公开了一种用于控制布置在制冷系统（1）中的可变容量喷射器单元（7）的方法。 基于获得的温度和获得的离开排热换热器（3）的制冷剂的压力，或者基于用于控制开口的开口的高压阀控制信号来生成用于喷射器单元（7）的喷射器控制信号 （7）平行流动布置的高压阀（6）的高度。 喷射器控制信号指示喷射器单元（7）的容量是应该增加，减少还是保持。 根据生成的喷射器控制信号来控制喷射器单元（7）的容量。 制冷系统（1）的功耗降低，而离开排热热交换器（3）的制冷剂压力保持在可接受的水平。

    A METHOD FOR CONTROLLING OPERATION OF A VAPOUR COMPRESSION SYSTEM IN A SUBCRITICAL AND A SUPERCRITICAL MODE
    54.
    发明公开
    A METHOD FOR CONTROLLING OPERATION OF A VAPOUR COMPRESSION SYSTEM IN A SUBCRITICAL AND A SUPERCRITICAL MODE 审中-公开
    一种用于控制蒸汽压缩系统的运行在一个关键的亚临界和超模式

    公开(公告)号：EP2729743A1

    公开(公告)日：2014-05-14

    申请号：EP12732776.5

    申请日：2012-07-03

    Applicant: Danfoss A/S

    Inventor： PRINS, Jan

    IPC: F25B9/00 ,  F25B49/02

    CPC classification number: F25B49/022 ,  F25B9/008 ,  F25B49/02 ,  F25B2309/061 ,  F25B2341/0662 ,  F25B2400/13 ,  F25B2400/16 ,  F25B2500/19 ,  F25B2600/17 ,  F25B2600/2503 ,  F25B2700/21163

    Abstract: A method for controlling operation of a vapour compression system ( 1), and a vapour compression system ( 1) are disclosed. The vapour compression system (1) comprises a compressor (2), a heat rejecting heat exchanger (3), a controllable valve (4), a receiver (5), at least one expansion device and at least one evaporator arranged along a refrigerant path having refrigerant flowing therein. The vapour compression system (1) is capable of being operated in a subcritical control regime as well as in a supercritical control regime. The method comprises the steps of measuring a temperature, T
    GC , of refrigerant leaving the heat rejecting heat exchanger; calculating a pressure reference, P
    GC,Ref , based on the measured temperature, T
    GC , and using a calculation formula being applicable to the subcritical control regime as well as to the supercritical control regime; and controlling an opening degree of the controllable valve in order to obtain a pressure of refrigerant leaving the heat rejecting heat exchanger which is equal to the calculated pressure reference, P
    GC , Ref. Since the calculation formula is applicable to the subcritical control regime as well as to the supercritical control regime, only one calculation formula is necessary, and the vapour compression system (1) can thereby be controlled in a very easy manner.

    A METHOD FOR CONFIGURING SETPOINTS FOR A VAPOUR COMPRESSION SYSTEM
    55.
    发明公开
    A METHOD FOR CONFIGURING SETPOINTS FOR A VAPOUR COMPRESSION SYSTEM 审中-公开

    公开(公告)号：EP4016207A1

    公开(公告)日：2022-06-22

    申请号：EP20215574.3

    申请日：2020-12-18

    Applicant: Danfoss A/S

    Inventor： PRINS, Jan ,  REICHWALD, Peter ,  PISCOPIELLO, Salvatore

    IPC: G05B19/042 ,  F25B49/02

    Abstract: A method for configuring a plurality of operating setpoints for a vapour compression system (1) is disclosed. The plurality of operating setpoints are divided into a first group (12) of operating setpoints to be generated manually and a second group (13) of operating setpoints to be generated automatically, and the operating setpoints are operated in accordance therewith. The manually generated operating setpoints (12) and the automatically generated operating setpoints (13) are provided to a setpoint manager (11), and the setpoint manager (11) checks if the provided operating setpoints (12, 13) are in compliance with a set of rules. In the case that at least some of the provided operating setpoints (12, 13) are not in compliance with the set of rules, the setpoint manager (11) adjusts at least some of the provided operating setpoints (12, 13) in accordance with the set of rules, thereby obtaining an adjusted set of operating setpoints. The vapour compression system (1) is subsequently controlled in accordance with the adjusted set of operating setpoints.

    A METHOD FOR HANDLING FAULT MITIGATION IN A VAPOUR COMPRESSION SYSTEM
    57.
    发明公开
    A METHOD FOR HANDLING FAULT MITIGATION IN A VAPOUR COMPRESSION SYSTEM 审中-公开

    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.

Patent Agency Ranking