公开(公告)号：WO2020126203A1

公开(公告)日：2020-06-25

申请号：PCT/EP2019/080574

申请日：2019-11-07

Applicant: DANFOSS A/S

Inventor： VAGNSHOLDT, Charlotte Vibeke Pingel ,  LARSEN, Sigurd

IPC: H02K5/128 ,  H02K1/18 ,  F16K31/04 ,  F25B41/06 ,  F16K27/02

Abstract: Valve (1), in particular expansion valve, is described comprising a valve element driven by an actuator and being arranged in a valve housing arrangement (4, 5, 15), wherein the valve housing arrangement (4, 5, 15) comprises a housing (4), a tube (15) connected to the housing (4) and at least one connector (5) extending from the housing (4), wherein the actuator comprises a rotary motor having a stator and a rotor, the rotor being arranged inside the tube (15) and the stator being arranged outside the tube (15). A simple way is needed to position the stator and the rotor relative to each other. To this end the stator is fixed to a stator holder (16) which is arranged around the tube (15) and connected to the housing arrangement (4, 5, 15).

公开(公告)号：WO2020109213A1

公开(公告)日：2020-06-04

申请号：PCT/EP2019/082380

申请日：2019-11-25

Applicant: DANFOSS A/S

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

IPC: F25B49/00 ,  G01K13/02

Abstract: The invention relates to a cooling system and operating method therefor with a direct expansion cooling circuit for an ammonia refrigerant. A compressor (12) is provided to compress ammonia vapor (11). A condenser is provided to condense the ammonia vapor to obtain liquid ammonia (20). An evaporator (32) is provided to evaporate the liquid ammonia. A superheat vapor quality sensor (40) is arranged at a conduit 34 between at least a portion of the evaporator (32) and the compressor (12). The superheat vapor quality sensor (40) comprises a heating element (48) and a temperature sensing element (52). The superheat vapor quality sensor (40) is disposed to deliver a sensor signal S indicative of a superheat vapor quality X of refrigerant flowing through the conduit (34) from an output of the temperature sensing element (52). The superheat vapor quality sensor (40) is arranged on a wall of a horizontally arranged portion of the conduit (34) in a position forming an angle of more than 120° to a vertical upward direction.

公开(公告)号：WO2019016243A1

公开(公告)日：2019-01-24

申请号：PCT/EP2018/069450

申请日：2018-07-18

Applicant: DANFOSS A/S

Inventor： CHRISTENSEN, Morten

IPC: G05D7/01

Abstract: A valve arrangement for controlling a flow of a heating or cooling fluid is described, said valve arrangement comprising a housing (2) having an inlet and an outlet, and a pressure regulating valve (11) being arranged between said inlet and said outlet and having a regulating valve element (12) and a regulating valve seat (13), said regulating valve element (12) being connected to a membrane (15), said membrane (15) having a flexible part (17). Such a valve arrangement should have a good regulation of flow. To this end a radially inner expansion space (27) is provided on a radially inner side (25) of the flexible part (17) of the membrane (15).

公开(公告)号：WO2018177956A1

公开(公告)日：2018-10-04

申请号：PCT/EP2018/057515

申请日：2018-03-23

Applicant: DANFOSS A/S

Inventor： PRINS, Jan ,  MADSEN, Kenneth Bank ,  LARSEN, Lars Finn Sloth

IPC: F25B49/02 ,  F25B1/10 ,  F25B9/08 ,  F25B41/04 ,  F25B5/02

Abstract: A method for controlling a vapour compression system (1) is disclosed. The vapour compression system (1) comprises an ejector (6) and a liquid separating device (10) arranged in a suction line. A liquid level sensor (18) is arranged in the liquid separating device (10). A liquid level in the liquid separating device (10) is monitored by means of the liquid level sensor (18). In the case that the liquid level in the liquid separating device (10) is above a predefined threshold level, a control parameter of the vapour compression system (1) is adjusted in order to increase a flow rate of refrigerant from the liquid separating device (10) to the secondary inlet (15) of the ejector (6) and/or decrease a flow rate of liquid refrigerant from the evaporator(s) (9) to the liquid separating device (10).

公开(公告)号：WO2018167027A1

公开(公告)日：2018-09-20

申请号：PCT/EP2018/056182

申请日：2018-03-13

Applicant: DANFOSS A/S

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

IPC: B01D19/00 ,  F16K24/04 ,  F25B47/02 ,  F25B41/04 ,  F16T1/24

Abstract: A drain valve (10) is described comprising a housing (11), a fluid inlet (12), a gas outlet (13) and at least one liquid outlet orifice (19) arranged in a liquid outlet member (20) of the housing (11). The drain valve (10) furthermore comprises a float (16) connected to a lever (17) on a first end (18). The float (16) is arranged in a float chamber (15) of the housing (11). The float chamber (15) is connected to the fluid inlet (12), the gas outlet (13) and the at least one liquid outlet orifice (19). The liquid outlet orifice (19) may be opened or closed by a closing member (21) that is connected to a second end (22) of the lever (17) and is rotatably connected to the liquid outlet member (20). If a liquid is arranged in the float chamber (15) a rise in the liquid level will result in a lift of the float (16) whereby the closing member (21) is rotated to a more open position of the at least one liquid outlet orifice (19) and vice versa. Such a drain valve should be operated at higher fluid pressures without increasing the size of the valve. To this end the liquid outlet member (20) comprises a cylinder-like section and the closing member (21) is arranged concentrically around the cylinder-like section, wherein the closing member (21) comprises a closing element (24), wherein in the open valve position of the closing member (21) the closing element (24) converges towards the closest liquid outlet orifice (19) that the closing element (24) is matched to such that the surface of the closing element (24) perpendicular to the liquid flow direction through the liquid outlet orifice (19) is minimized, and the end of the liquid outlet orifice (19) that is first exposed when the liquid outlet orifice (19) is opened has the smallest width perpendicular to the opening direction of the closing element (24).

公开(公告)号：WO2018157961A1

公开(公告)日：2018-09-07

申请号：PCT/EP2017/083858

申请日：2017-12-20

Applicant: DANFOSS A/S

Inventor： LARSEN, Lars Finn Sloth ,  PRINS, Jan ,  MADSEN, Kenneth Bank

IPC: F25B1/10 ,  F25B49/02 ,  F25B41/00 ,  F25B41/04 ,  F25B5/02

Abstract: A method for controlling ejector capacity in a vapour compression system (1) is disclosed. A parameter value being representative for a flow rate of liquid refrigerant from the evaporator(s) (8, 10) and into a return pipe (12, 13) is obtained, and the capacity of the ejector(s) (6) is adjusted based on the obtained parameter value. Ejector capacity may be shifted between low pressure ejectors (liquid ejectors) (6a, 6b, 6c, 6d) and high pressure ejectors (gas ejectors) (6e, 6f).

公开(公告)号：WO2018109036A1

公开(公告)日：2018-06-21

申请号：PCT/EP2017/082683

申请日：2017-12-13

Applicant: DANFOSS A/S

Inventor： BIRKELUND, Michael ,  JENSEN, Leo Finn ,  PETERSEN, Hans Kurt ,  VAN BEEK, Johan

IPC: F16K39/02 ,  F25B13/00 ,  F16K11/22 ,  F16K27/00 ,  F16K31/40

CPC classification number: F16K27/003 ,  F16K11/22 ,  F16K31/408 ,  F16K39/024 ,  F25B13/00

Abstract: The present invention relates to a valve arrangement (2) for an operation mode selector of an air conditioning system, the valve arrangement (2) comprising a tube element (3) which comprises a discharge port (4), a suction port (5) and an evaporator port (6), the valve arrangement (2) furthermore comprising two or more mode selecting valves (9, 10) being arranged for selectively establishing a fluid connection through either the discharge port (4) or the suction port (5). It is the object of the invention to provide a compact design while still allowing silent switching between operation modes. The object is solved by one or more of the mode selecting valves being two-step opening valves. The invention furthermore relates to a pipe arrangement (1) comprising one or more of those valve arrangements (2) and an air conditioning system comprising such a valve arrangement (2) or such a pipe arrangement (1).

公开(公告)号：WO2018083015A1

公开(公告)日：2018-05-11

申请号：PCT/EP2017/077549

申请日：2017-10-27

Applicant: DANFOSS A/S

Inventor： VESTERGAARD, Niels P. ,  MATZEN, Detlef ,  KANAJAM, Rajkumar ,  VENKATESH, Raghavendra ,  FABRICIUS, Torben Schack

IPC: F16K31/122 ,  F25B41/04 ,  F25B47/02

Abstract: The present invention relates to a top cover (5) for soft throttling valve body (2), the top cover (5) comprising one or more fluid conduits for transferring a pilot fluid flow for setting a degree of opening of a main valve situated in a soft throttling valve body to the soft throttling valve body. Furthermore, the invention relates to a soft throttling valve (1) and a method for assembling the soft throttling valve (1). The object of the invention is to allow a good control of the pilot fluid flow while protecting the soft throttling valve body from damage due to valve failure. The object is solved by having a follower arrangement arranged to throttle the pilot fluid flow depending on the degree of opening of the main valve, further having a manual opening arrangement for manually opening the main valve and/or by further preventing a step-wise opening of the main valve in less than two opening steps. A method for assembling a soft throttling valve is also disclosed.

Abstract translation: 本发明涉及一种用于软节流阀体（2）的顶盖（5），顶盖（5）包括一个或多个流体导管，用于传递引导流体流动以设定一定程度的 将位于软节流阀体内的主阀打开到软节流阀体。 此外，本发明涉及软节流阀（1）和用于组装软节流阀（1）的方法。 本发明的目的是允许很好地控制先导流体流动，同时保护软节流阀体免于由于阀故障而损坏。 该目的通过具有从动装置来解决，该从动装置布置成根据主阀的打开程度来节流先导流体流动，还具有用于手动打开主阀的手动打开装置和/或通过进一步防止阶梯式开口 主阀门在两个以内的开启阶段。 还公开了一种组装软节流阀的方法。

公开(公告)号：WO2018038818A1

公开(公告)日：2018-03-01

申请号：PCT/US2017/042055

申请日：2017-07-14

Applicant: DANFOSS A/S ,  OH, Justin Jongsik

Inventor： OH, Justin Jongsik

IPC: F04D17/10 ,  F04D17/12 ,  F04D17/14 ,  F04D25/00 ,  F04D25/02 ,  F04D25/06

Abstract: One exemplary embodiment of this disclosure relates to a refrigerant compressor. The compressor includes an axial section having a plurality of blades and vanes and a centrifugal section having an impeller. The centrifugal section is arranged downstream of the axial section.

Abstract translation: 本公开的一个示例性实施例涉及一种制冷剂压缩机。 压缩机包括具有多个叶片和叶片的轴向部分和具有叶轮的离心部分。 离心部分布置在轴向部分的下游。

公开(公告)号：WO2018031071A1

公开(公告)日：2018-02-15

申请号：PCT/US2017/020953

申请日：2017-03-06

Applicant: DANFOSS A/S

Inventor： SUN, Lin ,  LIN, Huaiyu

IPC: F25B5/00 ,  F25B6/00 ,  F25B41/00 ,  F25B49/02 ,  F04B49/20 ,  H02P5/46 ,  H02P23/28 ,  H02P29/50

Abstract: Compressors in a refrigerant loop are driven by variable frequency drives. The variable frequency drives are configured to demand current from an alternating current power source at different phases relative to one another such that at least one current harmonic frequency at the alternating current power source is cancelled.

Abstract translation:

制冷剂回路中的压缩机由变频驱动器驱动。 变频驱动器被配置为从交流电源以相互不同的相位请求电流，使得交流电源处的至少一个电流谐波频率被抵消。