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公开(公告)号：US10941964B2
公开(公告)日：2021-03-09
申请号：US15527496
申请日：2015-10-07
Applicant: DANFOSS A/S
Inventor： Kristian Fredslund , Frede Schmidt , Kenneth Bank Madsen , Jan Prins
Abstract: A method for controlling a vapour compression system, the vapour compression system including a compressor unit with one or more compressors. At least one of the compressors is connectable to a gaseous outlet of a receiver, and at least one of the compressors is connectable to an outlet of an evaporator. A parameter of the vapour compression system is measured, an enthalpy of refrigerant leaving the heat rejecting heat exchanger being derivable from the measured parameter. A setpoint value for a pressure inside the receiver is calculated, based on the measured parameter, and the compressor unit is operated in accordance with the calculated setpoint value, and in order to obtain a pressure inside the receiver which is equal to the calculated setpoint value. The vapour compression system is operated in an energy efficient manner over a wide range of ambient temperatures.
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公开(公告)号：US10816245B2
公开(公告)日：2020-10-27
申请号：US15752042
申请日：2016-07-01
Applicant: Danfoss A/S
Inventor： Jan Prins , Frede Schmidt , Kenneth Bank Madsen , Kristian Fredslund
Abstract: A method for controlling a vapour compression system in an energy efficient and stable manner, the vapour compression system (1) including at least two evaporator groups (5a, 5b, 5c), each evaporator group (5a, 5b, 5c) including 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).
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23.发明授权公开(公告)号：US10563892B2
公开(公告)日：2020-02-18
申请号：US15501534
申请日：2015-08-21
Applicant: DANFOSS A/S
Inventor： Frede Schmidt , Kristian Fredslund , Jan Prins
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 refrigerant vapor compression system is estimated.
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公开(公告)号：US20190301780A1
公开(公告)日：2019-10-03
申请号：US16461937
申请日：2017-11-15
Applicant: Danfoss A/S
Inventor： Frede Schmidt , Jan Prins , Kristian Fredslund , Kenneth Bank Madsen
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.
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25.发明申请公开(公告)号：US20190301773A1
公开(公告)日：2019-10-03
申请号：US16461933
申请日：2017-11-15
Applicant: Danfoss A/S
Inventor： Kristian Fredslund , Kenneth Bank Madsen , Jan Prins , Frede Schmidt
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.
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Patent Agency Ranking
公开(公告)号：US20180164004A1
公开(公告)日：2018-06-14
申请号：US15577916
申请日：2016-05-25
Applicant: DANFOSS A/S
Inventor： Frede Schmidt , Kristian Fredslund , Jan Prins
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).
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公开(公告)号：US09879892B2
公开(公告)日：2018-01-30
申请号：US14379966
申请日：2013-02-16
Applicant: Danfoss A/S
Inventor： Kenneth Bank Madsen , Leif Skovvang Nielsen , Flemming Morten Schmidt , Frede Schmidt
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.
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公开(公告)号：US09874385B2
公开(公告)日：2018-01-23
申请号：US14436684
申请日：2013-09-11
Applicant: Danfoss A/S
Inventor： Roozbeh Izadi-Zamanabadi , Frede Schmidt
CPC classification number: F25B49/02 , F25B41/062 , F25B2341/0683 , F25B2600/21 , F25B2600/2513 , F25B2700/197 , F25B2700/21172 , F25B2700/21173 , F25B2700/21175
Abstract: A control arrangement for controlling a superheat of a vapour compression system includes a first sensor and a second sensor for measuring control parameters allowing a superheat value to be derived, a first controller arranged to receive a signal from the first sensor, a second controller arranged to receive a superheat value derived by a subtraction element, and to supply a control signal, based on the derived superheat value and a reference superheat value, and a summation element arranged to receive input from the the controllers, the summation element being arranged to supply a control signal for controlling opening degree of the expansion device. According to a first aspect the control arrangement includes a low pass filter arranged to receive a signal from the first sensor and to supply a signal to the subtraction element. According to a second aspect the first controller includes a PD element.
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公开(公告)号：US20170219263A1
公开(公告)日：2017-08-03
申请号：US15501534
申请日：2015-08-21
Applicant: DANFOSS A/S
Inventor： Frede Schmidt , Kristian Fredslund , Jan Prins
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.
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公开(公告)号：US20150316297A1
公开(公告)日：2015-11-05
申请号：US14646183
申请日：2013-11-18
Applicant: DANFOSS A/S
Inventor： Jans Prins , Frede Schmidt , Torben Green
CPC classification number: F25B7/00 , F25B5/02 , F25B6/00 , F25B49/02 , F25B49/022 , F25B2400/075 , F25B2600/0251 , F25B2600/0253 , F25B2600/0272 , F25B2600/2513 , F25B2700/21172 , F25D2600/06 , Y02B30/741
Abstract: A method for controlling operation of a refrigeration system (1), comprising one or more refrigeration entities (4), is disclosed. Each entity controller (7) obtains a measure for an error value between the measured value of a compressor control parameter and a setpoint value (8) for the compressor control parameter, and each entity controller (7) adjusts a refrigeration load of the corresponding refrigeration entity (4) to correspond to a cooling capacity of the compressor(s) (2), and in accordance with the obtained measure for an error value.
Abstract translation: 公开了一种用于控制包括一个或多个制冷实体（4）的制冷系统（1）的操作的方法。 每个实体控制器（7）获得压缩机控制参数的测量值与压缩机控制参数的设定值（8）之间的误差值的测量值，并且每个实体控制器（7）调整相应制冷器的制冷负荷 实体（4）对应于压缩机（2）的冷却能力，并且根据获得的误差值测量值。
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