公开(公告)号：US20220154726A1

公开(公告)日：2022-05-19

申请号：US17440301

申请日：2020-01-24

Applicant: Danfoss A/S

Inventor： Bruce Busby ,  Birkelund Michael ,  Van Beek Johan

IPC: F04D27/02

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：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).