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：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：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：WO2015001466A1

公开(公告)日：2015-01-08

申请号：PCT/IB2014/062719

申请日：2014-06-30

Applicant: DANFOSS A/S

Inventor： DAM, Bjarke Skovgård ,  FÖSEL, Georg ,  THOMSEN, Carsten Mølhede ,  SULLIVAN, Louis

IPC: F25B41/06

CPC classification number: F25B41/062 ,  F25B2341/061 ,  F25B2500/01 ,  F25B2500/26 ,  G05D7/0146

Abstract: An expansion valve (1) for a vapour compression system, the valve comprising a first valve part (5) having an outlet orifice (7) and a piston (8) movable inside the outlet orifice (7) in response to a differential pressure across the expansion valve (1), controlling a fluid flow through the first valve part (5), via a forward fluid passage through the first valve part (5). The piston (8) has different cylindrical shapes stepwise along a longitudinal extension of the piston (8), the piston (8) defining a first cross-sectional area along a first longitudinal extension and a second-cross sectional area along a second longitudinal extension, the first cross-sectional area being smaller than the second-cross sectional area. The first longitudinal extension is in the outlet orifice (7) at a first differential pressure and the second longitudinal extension is in the outlet orifice (7) at a second differential pressure, the first differential pressure being lower than the second differential pressure.

Abstract translation: 一种用于蒸气压缩系统的膨胀阀（1），该阀包括具有出口孔（7）的第一阀部分（5）和可在出口孔（7）内部移动的活塞（8） 所述膨胀阀（1）经由所述第一阀部（5）的向前流体通道来控制通过所述第一阀部（5）的流体流。 活塞（8）沿着活塞（8）的纵向延伸部具有不同的圆柱形形状，活塞（8）沿着第一纵向延伸部限定第一横截面积，沿着第二纵向延伸部限定第二横截面积 第一横截面积小于第二横截面面积。 第一纵向延伸部处于第一差压下的出口孔（7）中，第二纵向延伸部处于第二差压下的出口孔（7）中，第一差压低于第二压差。

公开(公告)号：WO2015001464A1

公开(公告)日：2015-01-08

申请号：PCT/IB2014/062717

申请日：2014-06-30

Applicant: DANFOSS A/S

Inventor： DAM, Bjarke Skovgård ,  FÖSEL, Georg ,  THOMSEN, Carsten Mølhede ,  PAWLIK, Jens ,  SULLIVAN, Louis

IPC: F25B41/06

CPC classification number: F25B41/062 ,  F16K15/026 ,  F25B2500/01 ,  F25B2500/26 ,  F25B2500/27

Abstract: An expansion valve (1) for a vapour compression system, the valve (1) comprising a first valve part (5) having an outlet orifice (7) and a piston (8) movable inside the outlet orifice (7) in response to a differential pressure across the expansion valve (1), controlling a fluid flow through the valve (1). The piston (8) comprises a stop element (9) at an outlet end (8b) of the piston (8) and mechanical forcing means (10) to force the piston (8) towards a position in which the stop element (9) is brought into abutment with a valve seat (12) of the first valve part (5). A differential pressure below a predefined threshold value causes the stop element (9) of the piston (8) to abut the valve seat (12) of the first valve part (5), preventing fluid flow through the first valve part (5), via the forward fluid passage.

Abstract translation: 一种用于蒸气压缩系统的膨胀阀（1），所述阀（1）包括具有出口孔（7）的第一阀部分（5）和可在所述出口孔（7）内移动的活塞（8） 膨胀阀（1）两端的差压，控制通过阀（1）的流体流动。 活塞（8）包括在活塞（8）的出口端（8b）处的止动元件（9）和用于迫使活塞（8）朝向止动元件（9）的位置的机械强制装置（10） 与第一阀部件（5）的阀座（12）邻接。 低于预定阈值的压差使得活塞（8）的止动元件（9）抵靠第一阀部件（5）的阀座（12），防止流体流过第一阀部件（5）， 通过正向流体通道。

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.

公开(公告)号：WO2015001465A1

公开(公告)日：2015-01-08

申请号：PCT/IB2014/062718

申请日：2014-06-30

Applicant: DANFOSS A/S

Inventor： DAM, Bjarke Skovgård ,  FÖSEL, Georg ,  THOMSEN, Carsten Mølhede ,  SULLIVAN, Louis

IPC: F25B41/06

CPC classification number: F25B41/062 ,  F25B2341/061 ,  F25B2500/01 ,  F25B2500/26 ,  G05D7/0146 ,  G05D16/106

Abstract: An expansion valve (1) for a vapour compression system, the valve (1) comprising a first valve part (5) having an outlet orifice (7) and a piston (8) movable inside the outlet orifice (7) in response to a differential pressure across the expansion valve (1), controlling a fluid flow through the first valve part (5). A cross-sectional flow area of the outlet orifice (7) between a circumference at an inner surface of the outlet orifice (7) and a circumference at an outer surface of the piston (8) varies as a function of the position of the piston (8) relative to the outlet orifice (7). A first cross-sectional flow area is defined at a first differential pressure, and a second cross-sectional flow area is defined at a second differential pressure, where the first cross-sectional flow area is smaller than the second cross-sectional flow area, and the first differential pressure is lower than the second differential pressure.

Abstract translation: 一种用于蒸气压缩系统的膨胀阀（1），所述阀（1）包括具有出口孔（7）的第一阀部分（5）和可在所述出口孔（7）内移动的活塞（8） 通过膨胀阀（1）两端的差压，控制通过第一阀部（5）的流体流。 出口孔（7）在出口孔（7）的内表面周围与活塞（8）外表面周长之间的横截面流动面积作为活塞位置的函数而变化 （8）相对于出口孔（7）。 在第一差压下限定第一横截面流动面积，并且第二横截面流动区域被限定在第二截面流动面积小于第二横截面流动面积的第二压差下， 并且第一压差低于第二压差。