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公开(公告)号：US10928107B2
公开(公告)日：2021-02-23
申请号：US15577916
申请日：2016-05-25
申请人： DANFOSS A/S
发明人： Frede Schmidt , Kristian Fredslund , Jan Prins
摘要： 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：US10544971B2
公开(公告)日：2020-01-28
申请号：US15527545
申请日：2015-10-07
申请人： DANFOSS A/S
摘要： A method for controlling a vapor compression system (1) is disclosed, the vapor compression system (1) comprising an ejector (5). The method comprises controlling a compressor unit (2) in order to adjust a pressure inside a receiver (6), on the basis of a detected pressure of refrigerant leaving an evaporator (8). The portion of refrigerant leaving the evaporator (8) which is supplied to a secondary inlet (15) of the ejector is maximized and the portion of refrigerant supplied directly to the compressor unit (2) is minimized, while ensuring that the pressure of refrigerant leaving the evaporator (8) does not decrease below an acceptable level.
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13.发明申请公开(公告)号：US20190264962A1
公开(公告)日：2019-08-29
申请号：US16308509
申请日：2017-06-21
申请人： Danfoss A/S
摘要： A method for controlling a valve arrangement (10) interconnecting at least one oil separator (8) and an oil receiver (9) in a vapour compression system (1) is disclosed. A pressure difference between a pressure prevailing inside the oil separator(s) (8) and a pressure prevailing inside the oil receiver (9) is obtained. Then a duration for an open time of an open/close sequence of the valve arrangement (10) is derived, based on the obtained pressure difference, and the valve arrangement (10) is controlled in accordance with the derived duration of an open time. The supply of oil to the oil receiver (9) can be accurately controlled, regardless of the operating conditions.
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公开(公告)号：US10378796B2
公开(公告)日：2019-08-13
申请号：US15531989
申请日：2015-10-08
申请人： DANFOSS A/S
摘要： A method for controlling a valve arrangement (12), e.g. in the form of a three way valve, in a vapor compression system (1) is disclosed, the vapor compression system (1) comprising an ejector (6). The valve arrangement (12) is arranged to supply refrigerant to a compressor unit (2) from the gaseous outlet (11) of a receiver (7) and/or from the outlet of an evaporator (9). The vapor compression system (1) may be operated in a first mode of operation (summer mode) or in a second mode of operation (winter mode). When operated in the second mode of operation, it is determined whether or not conditions for operating the vapor compression system (1) in the first mode of operation are prevailing. If this is the case, the valve arrangement (12) is actively switched to the first mode of operation by closing a first inlet (13) towards the evaporator (7) and fully opening a second inlet (14) towards the receiver (7).
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公开(公告)号：US20180313581A1
公开(公告)日：2018-11-01
申请号：US15771199
申请日：2016-10-31
申请人： Danfoss A/S
发明人： Kristian Fredslund , Jan Prins , Kenneth Madsen , Frede Schmidt
CPC分类号： F25B1/10 , F25B9/08 , F25B41/04 , F25B2341/0012 , F25B2341/0662 , F25B2400/23 , F25B2600/2519
摘要： 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).
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16.发明申请公开(公告)号：US20180283754A1
公开(公告)日：2018-10-04
申请号：US15763918
申请日：2016-10-14
申请人： Danfoss A/S
摘要： 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.
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公开(公告)号：US20170321941A1
公开(公告)日：2017-11-09
申请号：US15527545
申请日：2015-10-07
申请人： DANFOSS A/S
摘要： A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising an ejector (5). The method comprises controlling a compressor unit (2) in order to adjust a pressure inside a receiver (6), on the basis of a detected pressure of refrigerant leaving an evaporator (8). The portion of refrigerant leaving the evaporator (8) which is supplied to a secondary inlet (15) of the ejector is maximised and the portion of refrigerant supplied directly to the compressor unit (2) is minimised, while ensuring that the pressure of refrigerant leaving the evaporator (8) does not decrease below an acceptable level.
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公开(公告)号：US09696076B2
公开(公告)日：2017-07-04
申请号：US14390865
申请日：2013-04-19
申请人： Danfoss A/S
发明人： Jan Prins , Frede Schmidt
CPC分类号： F25B49/02 , F25B49/027 , F25B2313/0294 , F25B2600/11 , F25B2600/111 , F25B2700/172 , F25B2700/2103 , F25B2700/2106 , F25B2700/21163 , F25D17/06 , Y02B30/743
摘要： A method of controlling a fan of a vapor compression system is disclosed. The vapor compression system includes 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 allows the electrical energy consumption of the fan to be reduced without risking instability of the vapor compression system.
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公开(公告)号：US20150323234A1
公开(公告)日：2015-11-12
申请号：US14436684
申请日：2013-09-11
申请人： Danfoss A/S
CPC分类号： F25B49/02 , F25B41/062 , F25B2341/0683 , F25B2600/21 , F25B2600/2513 , F25B2700/197 , F25B2700/21172 , F25B2700/21173 , F25B2700/21175
摘要： A control arrangement (1) for controlling a superheat of a vapour compression system is disclosed. The control arrangement (1) comprises a first sensor (4) and a second sensor (5) for measuring control parameters allowing a superheat value to be derived; a first controller (6) arranged to receive a signal from the first sensor (4), a second controller (10) arranged to receive a superheat value derived by a subtraction element (9), and to supply a control signal, based on the derived superheat value, and in accordance with a reference superheat value, and a summation element (8) arranged to receive input from the first controller (6) and from the second controller (10), said summation element (8) being arranged to supply a control signal for controlling opening degree of the expansion device (3) on the basis of the received input. According to a first aspect the control arrangement comprises a low pass filter (7) arranged to receive a signal from the first sensor (4) and to supply a signal to the subtraction element (9), said low pass filter (7) being designed in accordance with dynamic behaviour of the evaporator (2) and/or of the first sensor (4). According to a second aspect the first controller (6) comprises a PD element.
摘要翻译： 公开了一种用于控制蒸汽压缩系统的过热度的控制装置（1）。 控制装置（1）包括用于测量允许过热值被导出的控制参数的第一传感器（4）和第二传感器（5） 布置成从第一传感器（4）接收信号的第一控制器（6），布置成接收由减法元件（9）导出的过热值的第二控制器（10），并且基于 并且根据参考过热值，以及被配置为接收来自第一控制器（6）和第二控制器（10）的输入的求和元件（8），所述求和元件（8）被布置成供应 控制信号，用于根据接收到的输入来控制扩展装置（3）的开度。 根据第一方面，控制装置包括布置成接收来自第一传感器（4）的信号并向减法元件（9）提供信号的低通滤波器（7），所述低通滤波器（7）被设计 根据蒸发器（2）和/或第一传感器（4）的动态特性。 根据第二方面，第一控制器（6）包括PD元件。
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公开(公告)号：US11060767B2
公开(公告)日：2021-07-13
申请号：US15771199
申请日：2016-10-31
申请人： Danfoss A/S
发明人： Kristian Fredslund , Jan Prins , Kenneth Madsen , Frede Schmidt
IPC分类号： F25B1/10 , F25B41/385 , F25B41/39 , F25B41/20 , F25B9/08
摘要： 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).
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