公开(公告)号：US11976747B2

公开(公告)日：2024-05-07

申请号：US17440301

申请日：2020-01-24

Applicant: Danfoss A/S

Inventor： Bruce Busby ,  Michael Birkelund ,  Johan Van Beek

IPC: F16K15/02 ,  F04D27/02 ,  F16K47/00 ,  F04D17/10 ,  F04D29/048 ,  F25B31/00

CPC classification number: F16K47/0111 ,  F04D27/0292 ,  F16K15/026 ,  F04D17/10 ,  F04D27/0215 ,  F04D29/048 ,  F25B31/00

Abstract: The invention relates to a compressor unit (200) for a refrigeration system using a refrigerant. The compressor (200) unit includes a centrifugal compressor (201) for compressing the refrigerant, wherein the compressor (201) has a discharge outlet (204) for discharging the compressed refrigerant, and a check valve (1; 100; 301a). An inlet (83) of the check valve (1; 100; 301a) is in fluid connection with the discharge outlet (204) of the compressor (201). In order to provide a more reliable and more quite compressor unit (200), the check valve (1; 100; 301a) is a nozzle check valve including a damping mechanism (41, 50; 50, 141), wherein a closing parameter of the check valve (1; 100; 301a) is between 50 s/m2 and 2000 s/m2, wherein the closing parameter is a closing time of the check valve (1; 100; 301a) divided by a port area of the check valve (1; 100; 301a).

公开(公告)号：US20220018793A1

公开(公告)日：2022-01-20

申请号：US17297640

申请日：2019-11-25

Applicant: Danfoss A/S

Inventor： Niels P. Vestergaard ,  Johan Van Beek

IPC: G01N25/08 ,  F25B49/02

Abstract: The invention relates to a sensor arrangement for providing a sensor signal S indicative of a vapor quality X of a medium flowing within a conduit 38a. A sensor includes a heating element and a temperature sensing element is arranged in thermal contact with a wall of a horizontally arranged portion 38a of the conduit 34. Processing means are disposed to deliver a sensor signal S based on an output of the temperature sensing element 52. The sensor 40 includes a sensor body 46 made of a metal material. The heating element 48 and the temperature sensing element 52 are arranged in thermal contact with the sensor body 46. The invention further relates to a cooling system 10 including at least one evaporator 32 for evaporating an ammonia refrigerant, at least one compressor 12 arranged to compress the evaporated refrigerant, and at least one condenser 18 for condensing the compressed refrigerant, and at least one evaporator pump 30 for pumping the condensed refrigerant to the evaporator 32. A sensor arrangement 50 is arranged at a conduit 34 conducting the refrigerant from at least a portion of the evaporator 32.

公开(公告)号：US20220026127A1

公开(公告)日：2022-01-27

申请号：US17297596

申请日：2019-11-25

Applicant: Danfoss A/S

Inventor： Niels P. Vestergaard ,  Johan Van Beek

IPC: F25B49/02 ,  F25B43/00

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：US11365919B2

公开(公告)日：2022-06-21

申请号：US17044395

申请日：2019-07-02

Applicant: Danfoss A/S

Inventor： Thomas Lund ,  Johan Van Beek ,  Niels P. Vestergaard

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：US20210102737A1

公开(公告)日：2021-04-08

申请号：US17044395

申请日：2019-07-02

Applicant: Danfoss A/S

Inventor： Thomas Lund ,  Johan Van Beek ,  Niels P. Vestergaard

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.