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公开(公告)号：US11682944B2
公开(公告)日：2023-06-20
申请号：US17791586
申请日：2020-02-20
Applicant: DANFOSS A/S
Inventor： Delvis Anibal Gonzalez , Lin Xiang Sun
CPC classification number: H02K7/09 , F16C32/0465 , F25B31/026
Abstract: This disclosure relates to an axial magnetic bearing for a centrifugal refrigerant compressor, and a corresponding system and method. A centrifugal refrigerant compressor system according to an exemplary aspect of the present disclosure includes, among other things, an impeller connected to a shaft, and a magnetic bearing system supporting the shaft. The magnetic bearing system includes an axial magnetic bearing, which itself includes a first permanent magnet configured to generate a first bias flux, a second permanent magnet axially spaced-apart from the first permanent magnet and configured to generate a second bias flux, and an electromagnet. The electromagnet includes a coil arranged radially outward of the first and second permanent magnets, and the electromagnet is configured to selectively generate either a first control flux or a second control flux to apply a force to the shaft in a first axial direction or second axial direction opposite the first axial direction, respectively.
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公开(公告)号：US20220260082A1
公开(公告)日：2022-08-18
申请号：US17574606
申请日：2022-01-13
Applicant: Danfoss A/S
Inventor： Delvis Anibal Gonzalez , Lin Xiang Sun
IPC: F04D25/06 , F04D29/048
Abstract: This disclosure relates to a refrigerant compressor including a magnetic bearing assembly, and more particularly, to insulation for use in connection with the magnetic bearing assembly. In some aspects, the techniques described herein relate to a refrigerant compressor including an electric motor configured to rotationally drive an impeller via a shaft, and a radial magnetic bearing assembly including a lamination stack coated with an epoxy material.
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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
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°.
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公开(公告)号：US11739654B2
公开(公告)日：2023-08-29
申请号：US17422407
申请日：2020-02-21
Applicant: Danfoss A/S
Inventor： Alonso Perez , Lin Xiang Sun , Jin Yan , Tianlei Li
IPC: F01D11/12 , F01D11/02 , F01D15/00 , F16J15/447 , F25B31/00
CPC classification number: F01D11/122 , F01D11/02 , F01D15/005 , F16J15/447 , F25B31/00 , F05D2240/55
Abstract: A compressor according to an exemplary aspect of the present disclosure includes, among other things, a rotor configured to rotate with respect to a stator, the stator having an abradable portion. At least one labyrinth seal is between the rotor and the stator, wherein the labyrinth seal comprises a plurality of teeth extending from the rotor toward the abradable portion.
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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
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.
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Patent Agency Ranking
公开(公告)号：US11994136B2
公开(公告)日：2024-05-28
申请号：US17618910
申请日：2020-07-31
Applicant: DANFOSS A/S
Inventor： Lin Xiang Sun , Brandon Keith Pritchard
CPC classification number: F04D17/122 , F04D27/007 , F24F1/24 , F25B31/008 , H02K11/25 , F25B2700/1933
Abstract: A refrigerant compressor includes, among other things, a first stage and a second stage downstream of the first stage, and a cooling line configured to cool power electronics. The cooling line is configured to be switched between a first mode and a second mode. The first mode is configured to dump refrigerant between the first stage and the second stage, and the second mode is configured to dump refrigerant upstream of the first stage.
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公开(公告)号：US11698076B2
公开(公告)日：2023-07-11
申请号：US17574606
申请日：2022-01-13
Applicant: Danfoss A/S
Inventor： Delvis Anibal Gonzalez , Lin Xiang Sun
IPC: F04D25/06 , F04D29/048 , H02K7/09 , F16C32/04
CPC classification number: F04D25/06 , F04D29/048 , F16C32/048 , H02K7/09
Abstract: A refrigerant compressor includes a magnetic bearing assembly including insulation for the coils and lamination stack of the assembly. The lamination stack includes coil apertures extending axially between opposed axial faces. An insert partially extends into a first coil aperture to prevent direct contact between first and second coils. The insert includes a first leg extending into a slot formed in the lamination stack and a second leg radially spaced-apart from the first leg with the second leg extending axially into the first coil aperture. An annular cover having first and second legs extends into respective slots and apertures of the lamination stack. A second annular cover is provided on the opposite face of the coils that is connected to free ends of the second legs. The lamination stack and coils are coated with an insulative material such as epoxy.
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公开(公告)号：US20220325720A1
公开(公告)日：2022-10-13
申请号：US17640550
申请日：2020-12-07
Applicant: DANFOSS A/S
Inventor： Tianlei Li , Lin Xiang Sun , Kevin Lohman
Abstract: A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, an impeller configured to rotate about an axis, and a shroud. The impeller has a plurality of blades. The shroud is secured to the impeller with an adhesive at tips of the plurality of blades.
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公开(公告)号：US20250020134A1
公开(公告)日：2025-01-16
申请号：US18751472
申请日：2024-06-24
Applicant: DANFOSS A/S
Inventor： Frank Ford , Jason Eick , Brandon Keith Pritchard , Lin Xiang Sun
IPC: F04D25/06 , F04D27/00 , F04D29/058 , F04D29/58
Abstract: An electric compressor includes an electric motor including a rotor and stator and a shaft rotating with the rotor to drive a compressor impeller. Bearings support the shaft. A housing encloses the impeller shaft, the bearings and the electric motor, and a sensor for sensing a condition within the housing. A control for the electric motor receives information from the sensor indicative of the potential of migrated refrigerant when the electric motor is not running. The control is operable to actuate a countermeasure to deliver heat into the housing to boil off the migrated refrigerant. A method is also disclosed.
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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
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°.
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