公开(公告)号：US12203472B2

公开(公告)日：2025-01-21

申请号：US17867892

申请日：2022-07-19

Applicant: Haier US Appliance Solutions, Inc.

Inventor： Joseph Wilson Latham

IPC: F04C28/08 ,  F04C18/344 ,  F04C28/28

Abstract: A method of operating a compressor includes obtaining a mechanical angle and an angular speed of a rotor, determining an amplitude of a fundamental harmonic of a periodic load torque exerted on the rotor based at least in part on the mechanical angle and a harmonic series representation of the periodic load torque, obtaining a speed error by subtracting the angular speed from a reference angular speed, determining a DC component of the periodic load torque based at least in part on a speed error and a closed loop feedback control algorithm, calculating an electromagnetic torque using the DC component of the periodic load torque and the amplitude of the fundamental harmonic of the periodic load torque, and operating the electric motor to generate the calculated electromagnetic torque on the rotor.

公开(公告)号：US12188437B2

公开(公告)日：2025-01-07

申请号：US16962457

申请日：2019-01-17

Applicant: EATON INTELLIGENT POWER LIMITED

Inventor： Douglas Anthony Hughes ,  Brandon Dennis Biller ,  Jim Kevin Spring ,  Jesse Drummond ,  Matthew Fortini

IPC: F02M26/49 ,  F02B33/34 ,  F02B33/38 ,  F02B39/10 ,  F02D41/00 ,  F02D41/06 ,  F02D41/14 ,  F02M26/00 ,  F02M26/05 ,  F02M26/33 ,  F02M26/34 ,  F02M26/50 ,  F04C18/12 ,  F04C18/14 ,  F04C28/06 ,  F04C28/08 ,  F04C29/02 ,  F04C29/04

Abstract: Exhaust gas recirculation pump (30) for an internal combustion engine that includes an electric motor (32) disposed within a housing (36). A Roots device (38) is coupled to the electric motor (32) and includes a housing (40) defining an internal volume (42) in which rotors (44) are disposed and are connected to the electric motor (32). The electric motor housing (36) includes a coolant path (48) formed therein which extends from a coolant inlet (58) to a coolant outlet (78), both coupled to an engine coolant circulation system. The housing includes an oil path (108) formed therein. The oil path includes an oil inlet (110) extending to at least one oil outlet (112). The oil inlet and outlet are coupled to an engine oil circulation system wherein the oil path (108) lubricates bearings (100) and a transmission assembly (46) of the exhaust gas recirculation pump (30).

公开(公告)号：US12129841B2

公开(公告)日：2024-10-29

申请号：US17428918

申请日：2020-02-20

Applicant: Edwards Limited

Inventor： Gerald Robin Shelley ,  Peter George Stammers ,  Brian Stuart Blakeley Roberts

IPC: F04B37/14 ,  F04B41/06 ,  F04B49/00 ,  F04B49/02 ,  F04B49/06 ,  F04B49/20 ,  F04B49/22 ,  F04C25/02 ,  F04C28/02 ,  F04C28/08 ,  F04C28/28 ,  F04D15/00 ,  F04D17/16 ,  F04D19/04 ,  F04D27/00 ,  F04D27/02

CPC classification number: F04B37/14 ,  F04B41/06 ,  F04B49/007 ,  F04B49/02 ,  F04B49/06 ,  F04B49/20 ,  F04B49/22 ,  F04C25/02 ,  F04C28/02 ,  F04C28/08 ,  F04C28/28 ,  F04D15/0027 ,  F04D17/168 ,  F04D19/04 ,  F04D27/004 ,  F04D27/0261 ,  F04B2205/09 ,  F04C2220/30

Abstract: A vacuum pumping apparatus may include: a common pumping line having a plurality of pumping line inlets and a pumping line outlet, each pumping line inlet being configured to couple with an outlet of an associated plurality of vacuum processing chambers; at least one primary vacuum pump in fluid communication with the pumping line outlet to pump gas from each vacuum processing chamber; and control logic operable to control operation of the primary vacuum pump in response to an indication of an operating state of the plurality of vacuum processing chambers. In this way, the performance of the primary vacuum pump can be adjusted to match the load provided by the processing chambers and when there is an excess capacity, the performance of the primary vacuum pumps can be reduced, which can lead to significant energy savings and reduce wear on the pump.

公开(公告)号：US12098722B2

公开(公告)日：2024-09-24

申请号：US17752216

申请日：2022-05-24

Applicant: Haier US Appliance Solutions, Inc.

Inventor： Joseph Wilson Latham

IPC: F04C28/08 ,  F04B49/08 ,  F04C18/324 ,  F04C18/356 ,  F04C28/28 ,  F04B49/06 ,  F04C14/12

CPC classification number: F04C28/08 ,  F04B49/08 ,  F04C18/324 ,  F04C18/3562 ,  F04C28/28 ,  F04B49/065 ,  F04C14/12 ,  F04C2240/40 ,  F04C2270/01 ,  F04C2270/03 ,  F04C2270/18 ,  F04C2270/605

Abstract: A method of operating a rolling piston compressor includes determining a pressure difference (ΔP) between a discharge pressure (Pd) within a compression volume and a suction pressure (Ps) within a suction volume; determining a pressure ratio (rp) equal to the discharge pressure (Pd) over the suction pressure (Ps); estimating a discharge pressure (Pd) based at least in part on the pressure difference (ΔP) and the pressure ratio (rp); determining that the discharge pressure (Pd) is greater than a predetermined pressure limit (Pd-limit); and lowering a target speed (ωtarget) of the rolling piston compressor.

公开(公告)号：US12066024B2

公开(公告)日：2024-08-20

申请号：US17753381

申请日：2019-09-30

Applicant: VOLVO TRUCK CORPORATION

Inventor： Hugo Bebon ,  Nathan Prod'Homme

IPC: F04C25/00 ,  F04B49/06 ,  F04B49/20 ,  F04C28/08

CPC classification number: F04C28/08 ,  F04B49/065 ,  F04B49/20 ,  F04C25/00 ,  F04C2240/40 ,  F04C2270/02 ,  F04C2270/0525

Abstract: A method for controlling the rotational speed (S) of an electric motor driven air compressor (2) that supplies compressed air to a pneumatically operated system (5) of a vehicle (1), characterized by the preliminary steps of: a) determining the efficiency (e) of the air compressor (2) for different values (Si) of the rotational speed (S) of the air compressor (2), the efficiency (e) of the air compressor (2) corresponding to the ratio between the pneumatic power (PI) produced by the air compressor (2) and the power (PO) given to the air compressor (2); b) determining one or several specific values (S2, S4) among said different values (Si), for which the efficiency (e) of the air compressor (2) is higher than a threshold value (emin) and/or comparatively higher than those determined for values (SI, S3) close to said specific value(s) (S2, S4); the preliminary steps a) and b) being preferably implemented only once; and characterized by the further repetitive steps of: c) determining the air consumption rate of the pneumatically operated system (5) receiving compressed air from the air compressor (2); d) determining a minimum rotational speed (Smin) of the air compressor (2) to obtain an air production rate of the air compressor (2) that is equal or substantially equal to said determined air consumption rate; e) determining if the specific value or one of the specific values (S2, S4) is greater than said determined minimum rotational speed (Smin); f) if no specific value is greater than said determined minimum rotational speed (Smin), controlling the rotational speed (S) of the air compressor (2) based on said minimum rotational speed (Smin); g) if only one specific value (S4) is greater than said determined minimum rotational speed (Smin), controlling the rotational speed (S) of the air compressor (2) based on said only one specific value (S4); h) if a plurality of specific values (S2, S4) is greater than said determined minimum rotational speed (Smin), determining the specific value (S2) with the best efficiency among said plurality of specific values (S2, S4) and controlling the rotational speed (S) of the air compressor (2) based on said specific value (S2) with the best efficiency.

公开(公告)号：US11879451B2

公开(公告)日：2024-01-23

申请号：US17198584

申请日：2021-03-11

Applicant: ClearMotion, Inc.

Inventor： Colin Patrick O'Shea ,  Clive Tucker ,  Brian Alexander Selden

IPC: F04B49/06 ,  F04B49/10 ,  F04B49/20 ,  F04C28/08

CPC classification number: F04B49/065 ,  F04B49/103 ,  F04B49/20 ,  F04B2201/0201 ,  F04B2201/0208 ,  F04B2201/1202 ,  F04B2201/1208 ,  F04B2203/0207 ,  F04C28/08

Abstract: Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit.

公开(公告)号：US11815095B2

公开(公告)日：2023-11-14

申请号：US17400141

申请日：2021-08-12

Applicant: Raymond Zhou Shaw ,  Yi Rong ,  Bin Wu

Inventor： Raymond Zhou Shaw ,  Yi Rong ,  Bin Wu

IPC: F04C25/02 ,  F04C28/24 ,  F04C28/08 ,  F04C28/02 ,  F04C23/00 ,  F04C18/12

CPC classification number: F04C25/02 ,  F04C18/126 ,  F04C23/003 ,  F04C28/02 ,  F04C28/08 ,  F04C28/24 ,  F04C2220/10 ,  F04C2270/05 ,  F04C2270/18 ,  F04C2270/19 ,  F04C2270/42 ,  F04C2270/44

Abstract: A power saving vacuuming pump system is based on complete-bearing-sealing and dry-large-pressure-difference root vacuuming root pumps includes an input valve at an input end of a vacuum space for receiving gas mixture of saturation water vapor and non-condensed air from a condenser of a power plant; a first root vacuum pump connected to the input valve for receiving gas mixture from the input valve and then compressing the gas mixture; a second root vacuum pump connected to the first root vacuum pump for receiving gas mixture from the first root vacuum pump and then compressing the gas mixture. Inner connection walls between the vacuum chamber and the two bearing chambers are installed respective bearings which are installed to be around the driving shaft, and thus all the vacuum chamber and the two bearing chambers are tightly sealed. The vacuum chamber is completely dried so as to prevent from internal emulsion.

公开(公告)号：US20230296096A1

公开(公告)日：2023-09-21

申请号：US17786051

申请日：2020-12-11

Applicant: Leybold France S.A.S.

Inventor： Christophe Despesse ,  Christian Moulin ,  Frederic Piu ,  Benoit Reynaud ,  Mickael Serayet

IPC: F04C29/02 ,  F04C25/02 ,  F04C28/08

CPC classification number: F04C29/026 ,  F04C25/02 ,  F04C28/08 ,  F04C2240/40 ,  F04C2240/81 ,  F04C2270/20

Abstract: A lubricant-sealed vacuum pump configured to pump fluid from an inlet to an exhaust, method and filter are disclosed. The lubricant-sealed vacuum pump comprises: a rotor; a filter for filtering lubricant from fluid to be output by the pump; control circuitry for controlling a speed of rotation of the rotor, the control circuitry being configured to control rotation of the rotor, such that the rotor rotates at a reduced speed initially when a pressure at the inlet is high and rotates at a higher operational speed when the pressure at the inlet has reduced.

公开(公告)号：US20230228269A1

公开(公告)日：2023-07-20

申请号：US18051074

申请日：2022-10-31

Applicant: TRANE INTERNATIONAL INC.

Inventor： Dennis R. Dorman ,  John R. Sauls

IPC: F04C18/16 ,  F25B49/02 ,  F01C21/02 ,  F04C28/08 ,  F25B1/047

CPC classification number: F04C18/16 ,  F01C21/02 ,  F04C28/08 ,  F25B1/047 ,  F25B49/025 ,  F04C2210/26 ,  F04C2270/052 ,  F25B2600/021 ,  Y02B30/70

Abstract: A variable capacity screw compressor comprises a suction port, at least two screw rotors and a discharge port being configured in relation to a selected rotational speed that operates at least one screw rotor at an optimum peripheral velocity that is independent of a peripheral velocity of the at least one screw rotor at a synchronous motor rotational speed for a rated screw compressor capacity. A motor is configured to drive the at least one screw rotor at a rotational speed at a full-load capacity that is substantially greater than the synchronous motor rotational speed at the rated screw compressor capacity. A variable speed drive receives a command signal from a controller and generates a control signal that drives the motor at the selected rotational speed.

公开(公告)号：US11686415B2

公开(公告)日：2023-06-27

申请号：US16837816

申请日：2020-04-01

Applicant: Inogen, Inc.

Inventor： Brenton Alan Taylor ,  Peter James Hansen ,  Daniel Wayne Chin ,  Patrick Fitzlindon Burgess ,  Michael Pollack

IPC: B01D53/047 ,  A61M16/00 ,  F16L39/04 ,  A61M16/10 ,  A61M16/08 ,  F04B53/16 ,  G01N33/00 ,  G01N33/497 ,  F04B49/06 ,  F04C28/08 ,  F04D27/00 ,  H03K3/017 ,  B01D53/04 ,  B01D53/053 ,  H01M50/247 ,  H01M50/284 ,  H01M50/204 ,  B01D53/00

CPC classification number: F16L39/04 ,  A61M16/0063 ,  A61M16/0875 ,  A61M16/101 ,  B01D53/0407 ,  B01D53/053 ,  F04B49/06 ,  F04B53/16 ,  F04C28/08 ,  F04D27/004 ,  G01N33/0031 ,  G01N33/497 ,  H01M50/204 ,  H01M50/247 ,  H01M50/284 ,  H03K3/017 ,  A61M2016/1025 ,  A61M2202/0208 ,  A61M2205/3331 ,  A61M2205/3375 ,  A61M2205/362 ,  A61M2205/3606 ,  A61M2205/8206 ,  A61M2230/42 ,  B01D53/00 ,  B01D2256/12 ,  B01D2257/102 ,  B01D2257/40 ,  B01D2259/4533 ,  B01D2259/4541 ,  F05B2270/301

Abstract: A battery retaining system for a portable oxygen concentrator includes a first rail configured to receive a first slide of a battery, a second rail configured to receive a second slide of the battery, the second rail being spaced apart from the first rail so as to form a channel configured to receive the battery, and a flexible stiffening mechanism configured to impart a biasing force on a surface of the battery when the battery is received within the channel. The flexible stiffening mechanism includes a protrusion projecting from the first rail at least partially towards the second rail and a slit positioned behind the protrusion and configured to facilitate travel of the protrusion fore and aft.