公开(公告)号：US11162727B2

公开(公告)日：2021-11-02

申请号：US16608311

申请日：2018-04-25

申请人： Danfoss A/S

发明人： Lars Finn Sloth Larsen ,  Jan Prins ,  Torben Green

IPC分类号： F25B49/02 ,  F25B5/02

摘要： A method for controlling suction pressure in a vapour compression system including one or more cooling entities is disclosed. For each cooling entity, 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 among the one or more cooling entities 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 is controlled in accordance with the maximum required suction pressure and/or required change in suction pressure for the identified most loaded cooling entity.

公开(公告)号：US20210285561A1

公开(公告)日：2021-09-16

申请号：US17195956

申请日：2021-03-09

申请人： Danfoss A/S

发明人： Janus Ellegaard Raasthøj ,  Claus Vestergaard ,  Klaus Hueg Wadsholt ,  Blooshee Paulraj

IPC分类号： F16K27/02 ,  F16K31/06

摘要： An actuator of a refrigerant valve is described, the actuator comprising a housing (5) having a chamber (12) with an opening (15) in an end face (26) of an end section (17) of the housing (5), the end section (17) having an outer thread (18), a tightening collar (6) having a radially inwardly protruding flange (20) and an inner thread (19) matching the outer thread (18), and an anchor ring (7) positionable between the tightening collar (6) and the end face (16), wherein the anchor ring (7) is elastically deformable at least in a radial direction with respect to an axis of the outer thread (18) and in a mounted condition at least partially overlaps the end face (16) and the flange (20) of the tightening collar (6), wherein a sealing ring (8) at the end face (16) shows a free side to the axial direction and is compressed by an axial force produced by screwing the tightening collar (6) onto the outer thread (18).

公开(公告)号：US11088651B2

公开(公告)日：2021-08-10

申请号：US16308878

申请日：2017-03-06

申请人： Danfoss A/S

发明人： Lin Sun ,  HuaiYu Lin

IPC分类号： F25B49/02 ,  H02P29/50 ,  F04B49/20 ,  F25B31/02 ,  H02P25/22 ,  H02P27/06 ,  F25B1/10

摘要： 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.

公开(公告)号：US11067191B2

公开(公告)日：2021-07-20

申请号：US16345964

申请日：2017-10-27

申请人： Danfoss A/S

发明人： Niels P. Vestergaard ,  Detlef Matzen ,  Rajakumar Kanajam ,  Raghavendra Venkatesh ,  Torben Schack Fabricius

IPC分类号： F16K31/122 ,  F16K31/124 ,  F25B47/02 ,  F25B41/20

摘要： 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.

公开(公告)号：US11035617B2

公开(公告)日：2021-06-15

申请号：US16196526

申请日：2018-11-20

申请人： Danfoss A/S

发明人： Bent Jensen

IPC分类号： F28D9/00 ,  F28F3/08 ,  F28F21/08 ,  F28F9/00

摘要： A heat transfer plate (10) for a plate-and-shell heat exchanger (100), the heat transfer plate (10) includes a plate body (11) having first and second sides (111, 112) opposite to each other in a direction perpendicular to the plate body (11); and a projection (12) protruding from the plate body (11) in a direction from the first side (111) towards the second side (112), extending along a segment (115S) of a periphery (115) of the plate body (11), and having a first end (121) and a second end (122).

公开(公告)号：US20210156600A1

公开(公告)日：2021-05-27

申请号：US17044151

申请日：2019-06-21

申请人： DANFOSS A/S

发明人： Roozbeh IZADI-ZAMANABADI ,  Carsten Mølhede THOMSEN

IPC分类号： F25B47/02 ,  F25B49/02 ,  F25B13/00 ,  F25B39/00

摘要： 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 Tair, of air leaving the evaporator (104). A rate of change of Tair is monitored and defrosting is terminated when the rate of change of the temperature, Tair, approaches zero.

公开(公告)号：US20210148343A1

公开(公告)日：2021-05-20

申请号：US17038959

申请日：2020-09-30

申请人： Danfoss A/S

发明人： Stig Kildegaard Andersen ,  Frank Holm Iversen ,  Sveinn Porarinsson

IPC分类号： F04B1/124 ,  F04B1/2021

摘要： A hydraulic piston machine is described comprising a piston (1) having a hollow (2) secured by a wall (3) and an insert (4) arranged in the hollow. Such a machine should have a high efficiency at low costs. To this end the insert (4) comprises a section (29) which extends out of the hollow (2).

公开(公告)号：US20210148342A1

公开(公告)日：2021-05-20

申请号：US17038818

申请日：2020-09-30

申请人： Danfoss A/S

发明人： Stig Kildegaard Andersen ,  Frank Holm Iversen ,  Sveinn Porarinsson

IPC分类号： F04B1/124 ,  F04B1/2078

摘要： A piston (1) of a hydraulic piston machine is described, the piston (1) having a hollow (2) surrounded by a wall (3) and an insert (4) arranged in the hollow (2). Such a piston is used to have a piston machine with high efficiency at low costs. To this end at least two pliable rings (12, 13) are arranged between the insert (4) and the wall (3).

公开(公告)号：US20210123682A1

公开(公告)日：2021-04-29

申请号：US17078228

申请日：2020-10-23

申请人： Danfoss A/S

发明人： Helge Nielsen ,  Jes Petersen

IPC分类号： F28D7/04

摘要： The present invention relate to a spiral heat exchanger formed of at least two sheets extending along a spiral-shaped path around a common centre body and separated to form at least a first and a second spiral-shaped substantially parallel flow channels extending and enabling flow communication between a radially outer orifice and a radially inner orifice, characterized in that the centre body comprises a wall body with an first conduit at the inner surface of the wall body being in fluid connection to the first flow channel, and an second conduit formed at the outer surface of the wall body and being in fluid connection to the second flow channel.

公开(公告)号：US10989222B2

公开(公告)日：2021-04-27

申请号：US16060438

申请日：2017-07-14

申请人： Danfoss A/S ,  Justin Jongsik Oh

发明人： Justin Jongsik Oh

IPC分类号： F04D29/56 ,  F04D19/02 ,  F04D29/28 ,  F25B1/053 ,  F01D17/16

摘要： 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.