公开(公告)号：WO2020126201A1

公开(公告)日：2020-06-25

申请号：PCT/EP2019/080497

申请日：2019-11-07

Applicant: DANFOSS A/S

Inventor： LARSEN, Sigurd

IPC: F25B41/06

Abstract: A valve(1), in particular expansion valve, is described comprising a valve element (6) driven by a rotary motor(7), wherein the motor (7) comprises a rotor (9) arranged inside a motor section (19) of a tube (14) and a stator (8)arranged outside the motor section (19) of the tube (14) and the rotor (9) is supported by a bearing(15), which bearing(15)is mounted with press fit in a bearing section (16) of the tube(14). Such a valve should have a small motor and a tube which can be produced with low costs. To this end the motor section (19) and the bearing section(17) comprise different diameters.

公开(公告)号：WO2020007866A1

公开(公告)日：2020-01-09

申请号：PCT/EP2019/067750

申请日：2019-07-02

Applicant: DANFOSS A/S

Inventor： LUND, Thomas ,  VAN BEEK, Johan ,  VESTERGAARD, Niels P.

IPC: F25B43/04

Abstract: An apparatus (1) for removing non-condensable gases from a refrigerant is described, said apparatus (1) comprising a pipe arrangement (2) having a pipe (3), cooling means (4) for the pipe (3), and venting means, wherein the pipe (3) comprises a connection geometry (5) for a connection to a refrigerant system. Such an apparatus should be operated with good efficiency. To this end the pipe comprises at least a first section (6) and a second section (7) which are directed in different directions.

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：WO2019238627A1

公开(公告)日：2019-12-19

申请号：PCT/EP2019/065117

申请日：2019-06-11

Applicant: DANFOSS A/S

Inventor： BENSLIMANE, Mohamed

IPC: G01L19/06

Abstract: A pressure sensor arrangement (1) for measuring a pressure of a fluid is described, the sensor arrangement (1) comprising a connector housing (2) having a fluid opening (3) and a fluid chamber (4) in connection with the fluid opening (3), at least one pressure sensitive element (5), a membrane (9) arranged between the pressure sensitive element (5) and the fluid chamber (4), and pressure attenuation means (10). Such a pressure sensor arrangement should be able to protect the measuring membrane from high frequency pressure pulsations with low costs. To this end the pressure attenuation means (10) are arranged in the fluid chamber (4) in direct contact with the membrane (9) separating the membrane (9) from the fluid in the fluid chamber and comprise a homogenous incompressible material having a mechanical loss factor of 0.1 or higher at frequencies of 200 Hz or higher.

公开(公告)号：WO2018202496A1

公开(公告)日：2018-11-08

申请号：PCT/EP2018/060572

申请日：2018-04-25

Applicant: DANFOSS A/S

Inventor： LARSEN, Lars Finn Sloth ,  PRINS, Jan ,  GREEN, Torben

IPC: F25B5/02 ,  F25B49/02

Abstract: A method for controlling suction pressure in a vapour compression system (1) comprising one or more cooling entities (5) is disclosed. For each cooling entity (5), a maximum required suction pressure and/or a required change in suction pressure for maintaining a target temperature in the refrigerated volume is obtained. A most loaded cooling entity (5) among the one or more cooling entities (5) is identified, based on the maximum required suction pressures and/or the required changes in suction pressure. The suction pressure of the vapour compression system (1) is controlled in accordance with the maximum required suction pressure and/or required change in suction pressure for the identified most loaded cooling entity (5).

公开(公告)号：WO2018167028A1

公开(公告)日：2018-09-20

申请号：PCT/EP2018/056183

申请日：2018-03-13

Applicant: DANFOSS A/S

Inventor： VERMA, Giriraj ,  GURUMOORTHY, Rajendren ,  KULKARNI, Shrikant ,  VESTERGAARD, Niels P.

IPC: B01D19/00 ,  F16K24/04 ,  F25B47/02 ,  F25B41/04 ,  F16K27/00

Abstract: A valve arrangement according to the present disclosure includes a valve module and a drain valve. The valve module includes first and second functional spaces, and an attachment interface defining a passage into one of the first or second functional spaces. The drain valve includes a fluid inlet and a fluid outlet formed through a common connector part that is connectable to the attachment interface to connect the fluid inlet of the drain valve to the second functional space and the at least one fluid outlet to the first functional space.

公开(公告)号：WO2018095786A1

公开(公告)日：2018-05-31

申请号：PCT/EP2017/079359

申请日：2017-11-15

Applicant: DANFOSS A/S

Inventor： PRINS, Jan ,  SCHMIDT, Frede ,  MADSEN, Kenneth Bank ,  FREDSLUND, Kristian

IPC: F25B49/02 ,  F25B41/00

Abstract: A method for controlling a vapour compression system (1) is disclosed. Malfunctioning of a gas bypass valve (8) is registered. An actual opening degree of the gas bypass valve (8) is derived, and a target opening degree of the gas bypass valve (8) is derived, based on one or more control parameters of the vapour compression system (1). The actual opening degree is compared to the target opening degree, and the vapour compression system (1) is controlled based on the comparison, and in order to match a mass flow of gaseous refrigerant through the gas bypass valve (8) to the actual opening degree of the gas bypass valve (8).

公开(公告)号：WO2017167367A1

公开(公告)日：2017-10-05

申请号：PCT/EP2016/057017

申请日：2016-03-31

Applicant: DANFOSS A/S

Inventor： JESPERSEN, Lars ,  CARSTENSEN, Morten

IPC: G01D4/00 ,  H04L25/02

Abstract: A utility meter (1) is described comprising a metering section (2), a communication interface (3), and a communication path (4) providing a galvanic isolation between said metering section (2) and said communication interface (3). Such a utility meter should be operated with low power consumption. To this end said communication path (4) comprises a transformer (5) having a primary side with a first primary terminal and a second primary terminal connected to said metering section (2) and a secondary side (S) connected to said communication interface.

Abstract translation: （2），通信接口（3）以及提供所述计量部分（2）与所述计量部分（2）之间的电流隔离的通信路径（4）的公用仪表（1） 所述通信接口（3）。 这种公用电表应该以低功耗运行。 为此，所述通信路径（4）包括变压器（5），该变压器具有连接到所述计量部分（2）的具有第一主要端子和第二主要端子的主侧以及连接到所述通信接口的次级侧（S）。

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。