公开(公告)号：WO2016150663A1

公开(公告)日：2016-09-29

申请号：PCT/EP2016/054349

申请日：2016-03-02

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  GREEN, Torben ,  PRINS, Jan

IPC: F24F3/044 ,  F24F11/00

CPC classification number: F24F11/30 ,  F24F3/044 ,  F24F3/1423 ,  F24F11/62 ,  F24F2011/0002 ,  F24F2110/10 ,  F24F2140/40 ,  F24F2203/10 ,  F24F2203/104

Abstract: A method for controlling an air handling unit (1) comprising an ingoing duct (3), an outgoing duct (4), a controlled space (2), at least one heating coil (10) and/or at least one cooling coil (11), and a mixing damper arrangement (6) and/or an enthalpy wheel (5). An intermediate temperature value (T mixer ) in the ingoing duct (3) at a position (12, 13) upstream relative to the heating coil(s) (10) and/or cooling coil(s) (11), and downstream relative to the mixing damper arrangement (6) and/or the enthalpy wheel (5) is measured, and the mixing damper arrangement (6) and/or the enthalpy wheel (5) is/are controlled in accordance with an intermediate temperature setpoint value, and in order to obtain an intermediate temperature value (T mixer ) which is equal to the intermediate temperature setpoint value. A stable control of the air handling unit (1) is obtained.

Abstract translation: 一种用于控制空气处理单元（1）的方法，包括进入管道（3），出口管道（4），受控空间（2），至少一个加热线圈（10）和/或至少一个冷却盘管 11）和混合阻尼器装置（6）和/或焓轮（5）。 在相对于加热线圈（10）和/或冷却盘管（11）的上游位置（12,13）处的入口管道（3）中的中间温度值（Tmixer）和相对于加热线圈 测量混合阻尼器装置（6）和/或焓轮（5），并且根据中间温度设定值控制混合阻尼器装置（6）和/或焓轮（5），并且 以获得等于中间温度设定值的中间温度值（Tmixer）。 获得空气处理单元（1）的稳定控制。

公开(公告)号：EP3964772A1

公开(公告)日：2022-03-09

申请号：EP20195068.0

申请日：2020-09-08

Applicant: Danfoss A/S

Inventor： ANDREASEN, Glenn ,  IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/02 ,  F25B9/00 ,  F25B5/02

Abstract: A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising an ambient temperature sensor (8) arranged to measure an ambient temperature. A time period during which the ambient temperature sensor (8) is unexposed to solar heating is selected. During the selected time period, measurements of the ambient temperature are obtained by means of the ambient temperature sensor (8), and measurements of at least one further parameter related to the vapour compression system (1) are obtained, while operating the vapour compression system (1). Model parameters for a model of at least a part of the vapour compression system (1) are derived, based on the obtained measurements, the model providing correlation between the ambient temperature and the at least one further parameter. Subsequently, the vapour compression system (1) is operated based on measurements of the at least one further parameter and based on ambient temperatures derived by means of the model including the derived model parameters.

公开(公告)号：WO2022053461A1

公开(公告)日：2022-03-17

申请号：PCT/EP2021/074605

申请日：2021-09-07

Applicant: DANFOSS A/S

Inventor： ANDREASEN, Glenn ,  IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/02 ,  F25B9/00 ,  F25B5/02

Abstract: A method for controlling a vapour compression system (1) is disclosed, the vapour compression system (1) comprising an ambient temperature sensor (8) arranged to measure an ambient temperature. A time period during which the ambient temperature sensor (8) is unexposed to solar heating is selected. During the selected time period, measurements of the ambient temperature are obtained by means of the ambient temperature sensor (8), and measurements of at least one further parameter related to the vapour compression system (1) are obtained, while operating the vapour compression system (1). Model parameters for a model of at least a part of the vapour compression system (1) are derived, based on the obtained measurements, the model providing correlation between the ambient temperature and the at least one further parameter. Subsequently, the vapour compression system (1) is operated based on measurements of the at least one further parameter and based on ambient temperatures derived by means of the model including the derived model parameters.

公开(公告)号：WO2015106906A1

公开(公告)日：2015-07-23

申请号：PCT/EP2014/077904

申请日：2014-12-16

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/02

CPC classification number: F25B49/02 ,  F25B2500/19 ,  F25B2500/28 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/21171

Abstract: A method for controlling a supply of refrigerant to an evaporator (2) of a vapour compression system (1), such as a refrigeration system, an air condition system or a heat pump. The opening degree of the expansion valve (3) is controlled on the basis of an air temperature, T air , of air flowing across the evaporator (2), and in order to reach a reference air temperature, T air, ref . The opening degree is set to the calculated opening degree, overlaid with a perturbation signal. A temperature signal, S 2 , representing a temperature of refrigerant leaving the evaporator (2) is monitored and analysed. In the case that the analysis reveals that a dry zone of the evaporator (2) is approaching a minimum length, the opening degree of the expansion valve (3) is decreased. This provides a safety mechanism which ensures that liquid refrigerant is prevented from passing through the evaporator (2).

Abstract translation: 一种用于控制向诸如制冷系统，空调系统或热泵的蒸气压缩系统（1）的蒸发器（2）供应制冷剂的方法。 基于流过蒸发器（2）的空气的空气温度Tair控制膨胀阀（3）的开度，并且为了达到参考空气温度Tair，参考。 开度设定为计算开度，用扰动信号重叠。 监测并分析表示离开蒸发器（2）的制冷剂的温度的温度信号S2。 在分析显示蒸发器（2）的干燥区域接近最小长度的情况下，膨胀阀（3）的开度减小。 这提供了一种确保液体制冷剂不被通过蒸发器（2）的安全机构。

公开(公告)号：EP2630422B1

公开(公告)日：2015-09-23

申请号：EP11776069.4

申请日：2011-10-19

Applicant: Danfoss A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  LARSEN, Lars, Finn, Sloth ,  THYBO, Claus

IPC: F25B41/06

CPC classification number: F25B49/02 ,  F25B41/062 ,  F25B2500/19 ,  F25B2600/21

Abstract: A method for controlling a supply of refrigerant to an evaporator (5) of a vapor compression system (1), such as a refrigeration system, an air condition system or a heat pump, is disclosed. The vapor compression system (1) comprises an evaporator (5), a compressor (2), a condenser (3) and an expansion device (4) arranged in a refrigerant circuit. The method comprises the steps of: Actuating a component, such as an expansion valve (4), a fan or a compressor (2), of the vapor compression system (1) in such a manner that a dry zone in the evaporator (5) is changed; measuring a temperature signal representing a temperature of refrigerant leaving the evaporator (5); analyzing the measured temperature signal, e.g. including deriving a rate of change signal; determining a temperature value where a gain of a transfer function between the actuated component and the measured temperature drops from a maximum value to a minimum value, in a decreasing temperature direction; defining the determined temperature value as corresponding to a zero superheat (SH=0) value of refrigerant leaving the evaporator (5), and controlling a supply of refrigerant to the evaporator (5) in accordance with the defined SH=0 temperature value, and on the basis of the measured temperature signal. The method steps may be repeated at certain time intervals in order to provide updated determinations of the SH=0 temperature value. The method allows the SH=0 point to be determined purely on the basis of the measured temperature signal. Subsequently, the supply of refrigerant to the evaporator (5) can be controlled purely on the basis of the measured temperature signal.

公开(公告)号：EP2912389A1

公开(公告)日：2015-09-02

申请号：EP13762056.3

申请日：2013-09-11

Applicant: Danfoss A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  SCHMIDT, Frede

IPC: F25B49/02

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.

公开(公告)号：EP3587964A1

公开(公告)日：2020-01-01

申请号：EP18179424.9

申请日：2018-06-22

Applicant: Danfoss A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  THOMSEN, Carsten Mølhede

IPC: F25B49/02 ,  F25B47/02

Abstract: A method for terminating defrosting of an evaporator (104) is disclosed. The evaporator (104) is part of a vapour compression system (100). The vapour compression system (100) further comprises a compressor unit (101), a heat rejecting heat exchanger (102), and an expansion device (103). The compressor unit (101), the heat rejecting heat exchanger (102), the expansion device (103) and the evaporator (104) are arranged in a refrigerant path, and an air flow is flowing across the evaporator (104). When ice is accumulated on the evaporator (104), the vapour compression system (100) operates in a defrosting mode. At least two temperature sensors (306, 307) monitor an evaporator inlet temperature, T e,in , at a hot gas inlet (304) of the evaporator (104) and an evaporator outlet temperature, T e,out , at a hot gas outlet (305) of the evaporator (104). A difference between T e,in and T e,ou ,is monitored and defrosting is terminated when the rate of change of the difference between T e,in and T e,out approaches zero.

公开(公告)号：EP2888540A2

公开(公告)日：2015-07-01

申请号：EP13740205.3

申请日：2013-07-10

Applicant: Danfoss A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  ANDERSEN, Casper Lindholdt

IPC: F25B41/06 ,  F25B49/02 ,  G01K15/00

CPC classification number: G01K15/005 ,  F25B49/02 ,  F25B2600/2513 ,  F25B2700/21174 ,  F25B2700/21175

Abstract: A method for calibrating a temperature sensor arranged in a vapor compression system is disclosed. The opening degree of an expansion device is alternatingly increased and decreased. Simultaneously a temperature of refrigerant entering the evaporator and a temperature of refrigerant leaving the evaporator are monitored. For each cycle of the opening degree of the expansion device, a maximum temperature, T1, max, of refrigerant entering the evaporator, and a minimum temperature, T2, min, of refrigerant leaving the evaporator are registered. A calibration value, ΔT1, is calculated as ΔT1=C−(T2, min−T1, max) for each cycle, and a maximum calibration value, among the calculated values is selected. Finally, temperature measurements performed by the first temperature sensor are adjusted by an amount defined by ΔT1, max.

Abstract translation: 公开了一种用于校准布置在蒸气压缩系统中的温度传感器的方法。 膨胀装置的开度交替地增加和减小。 同时监测进入蒸发器的制冷剂的温度和离开蒸发器的制冷剂的温度。 对于膨胀装置的开度的每个循环，记录进入蒸发器的制冷剂的最高温度T1，max和离开蒸发器的制冷剂的最低温度T2，min。 每个循环的校准值＆Dgr; T1计算为＆Dgr; T1 = C-（T2，min-T1，max），并选择计算值之间的最大校准值。 最后，由第一温度传感器进行的温度测量由＆Dgr; T1，max定义的量调节。

公开(公告)号：WO2019243591A1

公开(公告)日：2019-12-26

申请号：PCT/EP2019/066502

申请日：2019-06-21

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  THOMSEN, Carsten Mølhede ,  PRINS, Jan

IPC: F25B49/02 ,  F25B47/00 ,  F25B47/02

Abstract: A method for detecting ice accumulation on an evaporator (104) of a vapour compression system (100) is disclosed. The evaporator (104) is part of a vapour compression system (100). The vapour compression system (100) further comprises a compressor unit (101), a heat rejecting heat exchanger (102), and an expansion device (103). The compressor unit (101), the heat rejecting heat exchanger (102), the expansion device (103) and the evaporator (104) are arranged in a refrigerant path, and an air flow is flowing across the evaporator (104). At least one temperature of air leaving the evaporator (104) is measured and a control value based on the measured temperature is derived. Determining whether ice has accumulated on the evaporator (104) by comparing the derived control value and a setpoint value.

公开(公告)号：WO2019243106A1

公开(公告)日：2019-12-26

申请号：PCT/EP2019/065120

申请日：2019-06-11

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  THOMSEN, Carsten Mølhede

IPC: F25B49/02 ,  F25B47/02

Abstract: A method for terminating defrosting of an evaporator (104) is disclosed. The evaporator (104) is part of a vapour compression system (100). The vapour compression system (100) further comprises a compressor unit (101), a heat rejecting heat exchanger (102), and an expansion device (103). The compressor unit (101), the heat rejecting heat exchanger (102), the expansion device (103) and the evaporator (104) are arranged in a refrigerant path, and an air flow is flowing across the evaporator (104). When ice is accumulated on the evaporator (104), the vapour compression system (100) operates in a defrosting mode. At least two temperature sensors (306, 307) monitor an evaporator inlet temperature, T e,in, at a hot gas inlet (304) of the evaporator (104) and an evaporator outlet temperature, T e,out, at a hot gas outlet (305) of the evaporator (104). A difference between T e,in and T e,ou ,is monitored and defrosting is terminated when the rate of change of the difference between T e,in and T e,out approaches zero.