公开(公告)号：WO2017121721A1

公开(公告)日：2017-07-20

申请号：PCT/EP2017/050397

申请日：2017-01-10

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/00 ,  F25B49/02

CPC classification number: F25B49/005 ,  F25B49/02 ,  F25B2500/19 ,  F25B2600/21 ,  F25B2600/23 ,  F25B2600/2513 ,  F25B2700/2106 ,  F25B2700/21175

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. During normal operation, 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/or on the basis of superheat of refrigerant leaving the evaporator (2). In the case that at least one sensor (5, 6, 23, 24) used for obtaining T air or the superheat is malfunctioning, operation of the vapour compression system (1) is switched to a contingency mode. A reference temperature, T out, ref , is calculated, based on previously obtained values of a temperature, T out , of refrigerant leaving the evaporator (2), during a predefined previous time interval, and subsequently the opening degree of the expansion valve (3) is controlled on the basis of the obtained temperature, T out , and in order to reach the calculated reference temperature, T out, ref , of the refrigerant leaving the evaporator (2). Efficient operation of the vapour compression system (1) is obtained, allowing changes in refrigeration load to be taken into account.

Abstract translation: 控制向蒸汽压缩系统（1）的蒸发器（2）供应制冷剂的方法，例如制冷系统，空调系统或热泵。 在正常操作期间，膨胀阀（3）的开度基于流经蒸发器（2）的空气的空气温度T air和/或基于 离开蒸发器（2）的制冷剂的过热。 在的情况下用于获得T个<子>空气或过热发生故障，蒸汽压缩系统（1）的操作被切换到一个应急模式的至少一个传感器（5,6，23，24） 。 基于之前获得的离开蒸发器（2）的制冷剂的温度T out的值，在预定义的预定温度T out期间计算参考温度T out，ref， 之前的时间间隔，并且随后根据所获得的温度T out来控制膨胀阀3的开度，并且为了达到所计算的参考温度T min， （2）的制冷剂的出口（ref）。 蒸汽压缩系统（1）的高效运行得以实现，可以考虑到制冷负载的变化。

公开(公告)号：EP3587963A1

公开(公告)日：2020-01-01

申请号：EP18179422.3

申请日：2018-06-22

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：EP3587962A1

公开(公告)日：2020-01-01

申请号：EP18179425.6

申请日：2018-06-22

Applicant: Danfoss A/S

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

IPC: 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 one temperature sensor (305) monitors a temperature T air , of air leaving the evaporator (104). A rate of change of T air is monitored and defrosting is terminated when the rate of change of the temperature, T air , approaches zero.

公开(公告)号：WO2019243561A1

公开(公告)日：2019-12-26

申请号：PCT/EP2019/066443

申请日：2019-06-21

Applicant: DANFOSS A/S

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

IPC: 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 one temperature sensor (305) monitors a temperature T air , of air leaving the evaporator (104). A rate of change of T air is monitored and defrosting is terminated when the rate of change of the temperature, T air , approaches zero.

公开(公告)号：WO2016091420A1

公开(公告)日：2016-06-16

申请号：PCT/EP2015/073232

申请日：2015-10-08

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/02

CPC classification number: F25B41/062 ,  F25B49/02 ,  F25B2500/19 ,  F25B2500/26 ,  F25B2600/2513 ,  F25B2700/21173 ,  F25B2700/21175

Abstract: A method for controlling a supply of refrigerant to an evaporator (2) of a vapour compression system (1) is disclosed. During a system identification phase an opening degree (12) of the expansion valve (3) is alternatingly increased and decreased, and a maximum temperature difference, (S 4 -S 2 ) max , between temperature, S 4 , of air flowing away from the evaporator (2) and temperature, S 2 , of refrigerant leaving the evaporator (2) is determined. During normal operation, the supply of refrigerant to the evaporator (2) is controlled by calculating a reference temperature, S 2,ref , based on the monitored temperature, S 4 , and the maximum temperature difference, (S 4 -S 2 ) max , determined during the system identification phase. The supply of refrigerant to the evaporator (2) is controlled in order to obtain a temperature, S 2 , of refrigerant leaving the evaporator (2) which is substantially equal to the calculated reference temperature, S 2,ref .

Abstract translation: 公开了一种用于控制向蒸汽压缩系统（1）的蒸发器（2）供应制冷剂的方法。 在系统识别阶段期间，膨胀阀（3）的开度（12）交替地增加和减小，并且在从蒸发器流出的空气的温度（S4）之间的最大温差（S4-S2）max 2）并且确定离开蒸发器（2）的制冷剂的温度S2。 在正常操作期间，通过基于所监视的温度S4和最大温差（S4-S2）max计算基准温度S2，ref来控制向蒸发器（2）的供应。 系统识别阶段 控制向蒸发器（2）供应制冷剂以便获得离开蒸发器（2）的制冷剂的温度S2基本上等于所计算的参考温度S2，ref。

公开(公告)号：WO2016066298A1

公开(公告)日：2016-05-06

申请号：PCT/EP2015/069276

申请日：2015-08-21

Applicant: DANFOSS A/S

Inventor： SHAFIEI, Seyed Ehsan ,  IZADI-ZAMANABADI, Roozbeh

IPC: F25D31/00 ,  G01K7/42

CPC classification number: G01K7/427 ,  F25B2500/19 ,  F25B2700/2106 ,  F25D29/00 ,  F25D2700/16

Abstract: A method for estimating a thermal capacity of foodstuff stored in a refrigerated volume of a refrigeration system. A thermal capacity of air inside the refrigerated volume is estimated, e.g. a time constant. Then the setpoint temperature for the air inside the refrigerated volume is changed, and the air temperature inside the refrigerated volume is monitored. A thermal capacity of the foodstuff stored in the refrigerated volume, e.g. a time constant, is estimated, based on the monitored air temperature and on the estimated thermal capacity of the air inside the refrigerated volume. The refrigeration system is controlled at least partly on the basis of the estimated thermal capacity of the foodstuff stored in the refrigerated volume.

Abstract translation: 一种用于估计存储在制冷系统的冷藏容积中的食品的热容量的方法。 估计冷藏容积内的空气的热容量，例如， 时间常数。 然后，冷藏容积内的空气的设定温度变化，并且监视冷藏容积内的空气温度。 存储在冷藏容积中的食品的热容量，例如 基于所监测的空气温度和冷藏容积内的空气的估计热容量来估计时间常数。 制冷系统至少部分地基于储存在冷藏容积中的食品的估计热容量来控制。

公开(公告)号：WO2014177957A1

公开(公告)日：2014-11-06

申请号：PCT/IB2014/060641

申请日：2014-04-11

Applicant: DANFOSS A/S

Inventor： IZADI-ZAMANABADI, Roozbeh ,  EHSAN SHAFIEI, Seyed

IPC: F25B5/00 ,  F25B49/02

CPC classification number: F25B49/02 ,  F25B5/00 ,  F25B2700/15

Abstract: A method for controlling operation of a vapour compression system (1) is provided, the vapour compression system (1) comprising two or more refrigeration entities, such as display cases. A signal representing a reference power consumption is received and compared to an actual power consumption of the vapour compression system (1). Based on the comparison, local controllers (3) calculate a setpoint temperature for a corresponding refrigeration entity, in order to obtain a power consumption which is equal to the reference power consumption. Each refrigeration entity is controlled in accordance with the calculated setpoint temperatures.

Abstract translation: 提供了一种用于控制蒸气压缩系统（1）的操作的方法，所述蒸气压缩系统（1）包括两个或多个制冷实体，诸如显示器壳体。 接收表示参考功率消耗的信号并与蒸气压缩系统（1）的实际功率消耗进行比较。 基于比较，本地控制器（3）计算相应制冷机构的设定点温度，以获得等于参考功率消耗的功耗。 每个制冷实体根据计算的设定点温度进行控制。

公开(公告)号：WO2012052019A1

公开(公告)日：2012-04-26

申请号：PCT/DK2011/000115

申请日：2011-10-19

Applicant: DANFOSS A/S ,  IZADI-ZAMANABADI, Roozbeh ,  LARSEN, Lars, Finn, Sloth ,  THYBO, Claus

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 vapour compression system (1), such as a refrigeration system, an air condition system or a heat pump, is disclosed. The vapour 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 vapour 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); analysing 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.

Abstract translation: 公开了一种用于控制向蒸气压缩系统（1）的蒸发器（5）供应制冷剂的方法，例如制冷系统，空调系统或热泵。 蒸气压缩系统（1）包括设置在制冷剂回路中的蒸发器（5），压缩机（2），冷凝器（3）和膨胀装置（4）。 该方法包括以下步骤：以蒸发器（5）中的干燥区域的方式驱动蒸气压缩系统（1）的部件，例如膨胀阀（4），风扇或压缩机（2） ）改变了 测量表示离开蒸发器（5）的制冷剂的温度的温度信号; 分析测量的温度信号，例如 包括导出变化率信号; 确定温度值，其中所述致动部件和所测量的温度之间的传递函数的增益在温度降低方向上从最大值下降到最小值; 将所确定的温度值定义为对应于离开蒸发器（5）的制冷剂的零过热（SH = 0）值，以及根据所定义的SH = 0温度值控制向蒸发器（5）供应的制冷剂;以及 在测量温度信号的基础上。 可以以特定时间间隔重复方法步骤，以便提供更新的SH = 0温度值的确定。 该方法允许基于测量的温度信号纯粹地确定SH = 0点。 随后，可以纯粹基于测量的温度信号来控制向蒸发器（5）供应制冷剂。

公开(公告)号：EP3403035B1

公开(公告)日：2019-12-18

申请号：EP17700638.4

申请日：2017-01-10

Applicant: Danfoss A/S

Inventor： IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/00 ,  F25B49/02

公开(公告)号：EP3403035A1

公开(公告)日：2018-11-21

申请号：EP17700638.4

申请日：2017-01-10

Applicant: Danfoss A/S

Inventor： IZADI-ZAMANABADI, Roozbeh

IPC: F25B49/00 ,  F25B49/02

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. During normal operation, the opening degree of the expansion valve (3) is controlled on the basis of an air temperature, Tair, of air flowing across the evaporator (2) and/or on the basis of superheat of refrigerant leaving the evaporator (2). In the case that at least one sensor (5, 6, 23, 24) used for obtaining Tair or the superheat is malfunctioning, operation of the vapour compression system (1) is switched to a contingency mode. A reference temperature, Tout, ref, is calculated, based on previously obtained values of a temperature, Tout, of refrigerant leaving the evaporator (2), during a predefined previous time interval, and subsequently the opening degree of the expansion valve (3) is controlled on the basis of the obtained temperature, Tout, and in order to reach the calculated reference temperature, Tout, ref, of the refrigerant leaving the evaporator (2). Efficient operation of the vapour compression system (1) is obtained, allowing changes in refrigeration load to be taken into account.