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：US20230279865A1

公开(公告)日：2023-09-07

申请号：US18197782

申请日：2023-05-16

Applicant: Danfoss A/S

Inventor： James Wilson ,  Jin Yan ,  Lin Xiang Sun ,  Ruiguo Gao ,  Brenden Richman

IPC: F04D29/16 ,  F04D17/10 ,  F01D5/18 ,  F01D5/28 ,  F16J15/447 ,  F04D29/10 ,  F01D11/02

CPC classification number: F04D29/162 ,  F04D17/10 ,  F01D5/186 ,  F01D5/28 ,  F16J15/4472 ,  F05D2240/55 ,  F01D5/189 ,  F04D29/102 ,  F01D11/02

Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.

公开(公告)号：US20200208642A1

公开(公告)日：2020-07-02

申请号：US16515668

申请日：2019-07-18

Applicant: Danfoss A/S

Inventor： Jin Yan ,  Lin Xiang Sun ,  Arnold Martin Schaefer ,  Ruiguo Gao

IPC: F04D27/02 ,  F25B1/053 ,  F04D17/10

Abstract: A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, an impeller arranged in a main flow path and including a plurality of vanes. The impeller is configured to rotate about an axis. A channel is outside the main flow path. A first orifice fluidly couples the channel to the main flow path upstream of the vanes, and a second orifice fluidly couples the channel to the main flow path downstream of leading edges of the vanes.

公开(公告)号：US20220213896A1

公开(公告)日：2022-07-07

申请号：US17546161

申请日：2021-12-09

Applicant: Danfoss A/S

Inventor： James Wilson ,  Jin Yan ,  Lin Xiang Sun ,  Ruiguo Gao ,  Brenden Richman

IPC: F04D29/16 ,  F04D17/10

Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.

公开(公告)号：US11143193B2

公开(公告)日：2021-10-12

申请号：US16515668

申请日：2019-07-18

Applicant: Danfoss A/S

Inventor： Jin Yan ,  Lin Xiang Sun ,  Arnold Martin Schaefer ,  Ruiguo Gao

IPC: F04D27/02 ,  F04D17/10 ,  F25B1/053

Abstract: A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, an impeller arranged in a main flow path and including a plurality of vanes. The impeller is configured to rotate about an axis. A channel is outside the main flow path. A first orifice fluidly couples the channel to the main flow path upstream of the vanes, and a second orifice fluidly couples the channel to the main flow path downstream of leading edges of the vanes.

公开(公告)号：US12146501B2

公开(公告)日：2024-11-19

申请号：US18197782

申请日：2023-05-16

Applicant: Danfoss A/S

Inventor： James Wilson ,  Jin Yan ,  Lin Xiang Sun ,  Ruiguo Gao ,  Brenden Richman

IPC: F01D11/02 ,  F04D17/10 ,  F04D29/16 ,  F01D5/18 ,  F01D5/28 ,  F04D29/10 ,  F16J15/447

Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.

公开(公告)号：US11692557B2

公开(公告)日：2023-07-04

申请号：US17546161

申请日：2021-12-09

Applicant: Danfoss A/S

Inventor： James Wilson ,  Jin Yan ,  Lin Xiang Sun ,  Ruiguo Gao ,  Brenden Richman

IPC: F01D11/02 ,  F04D29/16 ,  F04D17/10 ,  F01D5/18 ,  F01D5/28 ,  F04D29/10 ,  F16J15/447

CPC classification number: F04D29/162 ,  F04D17/10 ,  F01D5/186 ,  F01D5/189 ,  F01D5/28 ,  F01D11/02 ,  F04D29/102 ,  F05D2240/55 ,  F16J15/4472

Abstract: In some aspects, the techniques described herein relate to a refrigerant compressor, including: a stator; a rotor configured to rotate with respect to the stator; and at least one step seal between the rotor and the stator, wherein the step seal includes a first tooth and a second tooth extending from the rotor toward the stator, wherein a downstream surface of the first tooth and an upstream surface of the second tooth are arranged at an angle relative to one another, wherein the angle is less than 90°.