公开(公告)号：US11434918B2

公开(公告)日：2022-09-06

申请号：US16448422

申请日：2019-06-21

Applicant: Danfoss A/S

Inventor： Zili Sun ,  Ruiguo Gao ,  Stefan Walshe ,  Aida Rezaei ,  Dongkoo Shin

IPC: F04D29/043 ,  F04D29/048 ,  F25B31/02

Abstract: This disclosure relates to a compressor having a partially hollow shaft. In particular, an exemplary compressor includes a shaft which is partially hollow, and at least one impeller rotatably coupled to the shaft. The compressor may be a refrigerant compressor used in a heating, ventilation, and air conditioning (HVAC) chiller system.

公开(公告)号：US11841173B2

公开(公告)日：2023-12-12

申请号：US16455998

申请日：2019-06-28

Applicant: Danfoss A/S

Inventor： Tianlei Li ,  Zili Sun ,  Lin Sun

IPC: F04D27/00 ,  F25B1/053 ,  F04D29/44

CPC classification number: F25B1/053 ,  F04D27/002 ,  F04D29/441

Abstract: A centrifugal compressor includes a first stage and a second stage. At least one of the first stage and the second stage includes an impeller and a shroud spaced from the impeller and configured to guide a fluid flow through the impeller. The shroud is selectively moveable between an engaged position and a disengaged position.

公开(公告)号：US20200003455A1

公开(公告)日：2020-01-02

申请号：US16455998

申请日：2019-06-28

Applicant: Danfoss A/S

Inventor： Tianlei Li ,  Zili Sun ,  Lin Sun

IPC: F25B1/053 ,  F04D27/00 ,  F04D29/44

Abstract: A centrifugal compressor includes a first stage and a second stage. At least one of the first stage and the second stage includes an impeller and a shroud spaced from the impeller and configured to guide a fluid flow through the impeller. The shroud is selectively moveable between an engaged position and a disengaged position.