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公开(公告)号：US20230033429A1
公开(公告)日：2023-02-02
申请号：US17672536
申请日：2022-02-15
Applicant: Leybold GmbH
Inventor： Max Pelikan , Raffaello Ghislotti , Dirk Schiller , Daniel Reinhard
Abstract: A vacuum pump system comprising a main vacuum pump that is connected to a chamber that is to be evacuated. An auxiliary pump is connected to an outlet of the main vacuum pump. Furthermore, a sealing gas supply device is connected to the main vacuum pump. The sealing gas supply device is switched on and off with the aid of a control device as a function of a predetermined control variable. Additionally, a method for controlling the vacuum pump system.
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公开(公告)号：US11300125B2
公开(公告)日：2022-04-12
申请号：US16816519
申请日：2020-03-12
Applicant: THERMO KING CORPORATION
Inventor： Randall Scott Burnham , David Jon Renken , Erich Albert Lucht , Cullen Evan Hall
Abstract: Embodiments to help detect operation conditions of a compressor of a TRU in real time by a genset are disclosed. The operation conditions of the compressor can be determined by monitoring a parameter pattern of the genset, such as value changes of a horsepower, a torque, an exhaust temperature, fuel consumption and/or a RPM of a prime mover of the genset, or a current drawn from a generator of the genset, over a period of time. In one embodiment, when a scroll compressor is used in the TRU, the scroll compressor may start a periodical load/unload duty cycle when the TRU reaches its setpoint. The periodical load/unload duty cycle of the scroll compressor can be detected based on a corresponding fluctuation pattern in genset parameters. When this periodically fluctuating pattern of ECU parameters and/or current drawn is detected, the prime mover can be switched to a low operation speed.
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公开(公告)号：US11286937B2
公开(公告)日：2022-03-29
申请号：US16089470
申请日：2017-04-07
Applicant: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
Inventor： Bert Jozef I. Lathouwers , Antoon Stuer
Abstract: Electrically driven mobile compressor or pump, comprising at least one compressor element or pump element for supplying a pressurised fluid to a network of consumers of such pressurised fluid; an electric drive motor with a variable speed control coupled to the compressor element or pump element and a controller for the variable speed control of the electric drive motor as a function of the flow rate of compressed gas and/or pressure demanded by the network, and a connection for connection of the compressor or pump to an electricity supply source, and the controller is provided with an algorithm with which the electric current drawn from the supply source can be limited to a set or adjustable maximum value by controlling the speed.
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公开(公告)号：US20210372404A1
公开(公告)日：2021-12-02
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
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 rooms are installed respective bearings which are installed to be around the driving shaft, and thus all the vacuum chamber and the two bearing rooms are tightly sealed. The vacuum chamber is completely dried so as to prevent from internal emulsion.
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公开(公告)号：US11046152B2
公开(公告)日：2021-06-29
申请号：US16798040
申请日：2020-02-21
Applicant: Emerson Climate Technologies, Inc.
Inventor： Shawn W. Vehr , Joseph J. Rozsnaki
IPC: B60H1/32 , F04B35/04 , F04B49/02 , F04B49/20 , F04C28/06 , F04C28/08 , F25B49/02 , B60H1/00 , F04C18/02
Abstract: A refrigeration system includes a startup mode control module that receives an off time of a compressor and an ambient temperature, determines whether the off time and the ambient temperature indicate that the compressor is in a flooded condition, and selects, based on the determination, between a normal startup mode and a flooded startup mode. A compressor control module operates the compressor in the normal startup mode in response to the startup mode control module selecting the normal startup mode, operates the compressor in the flooded startup mode in response to the startup mode control module selecting the flooded startup mode, and transitions from the flooded startup mode to the normal startup mode after a predetermined period associated with operating in the flooded startup mode.
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Patent Agency Ranking
公开(公告)号：US20210156383A1
公开(公告)日：2021-05-27
申请号：US17168651
申请日：2021-02-05
Inventor： Toshiaki YABE , Tomoo SUZUKI , Yuuji ITOU , Kohei SAKAI
IPC: F04C28/06 , F04B39/00 , F04B35/04 , F04B49/06 , F04B49/20 , F04B49/08 , F04B27/08 , F04C18/16 , F04C28/08 , F04C28/24
Abstract: In order to reduce operation in a rotation-prohibited frequency range and to prevent resonance in a gas compressor wherein inverter control is performed, this gas compressor has: a compressor main body that compresses a gas; a motor that rotationally drives the compressor main body; an inverter that changes the rotational speed of the motor; a check valve arranged downstream from the compressor main body; a pressure detection means that detects load-side pressure downstream from the check valve; and a control device that, in accordance with the pressure detected by the pressure detection means, controls the frequency output by the inverter. The control device performs a control whereby compressed gas having a prescribed pressure is generated/maintained by increasing/decreasing the frequency, and when the frequency that generates the compressed gas having the prescribed pressure includes a specific frequency, the inverter's output frequency is increased or decreased when the pressure detected by the pressure detection means reaches a pressure corresponding to a frequency that has a more constant pressure width than the prescribed pressure and does not include the specific frequency.
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公开(公告)号：US10767650B2
公开(公告)日：2020-09-08
申请号：US15741166
申请日：2016-06-23
Applicant: DENSO CORPORATION
Inventor： Koji Sakai
IPC: F04C29/00 , F04C28/06 , H02P27/06 , H02P6/20 , H02P27/08 , H02P29/40 , H02P29/68 , B60H1/00 , F04C28/08 , F04C28/28 , F04C18/02
Abstract: A drive device of a compressor, including an inverter circuit formed of a plurality of switching elements, a drive unit that switches the switching elements, a determination unit that, when the compression mechanism restarts, determines whether a pressure difference of the compression mechanism is equal to or above a predetermined value, a restart unit that sets a number of times that the switching elements are switched per unit time during an initial predetermined period when the compression mechanism begins to restart and controls the drive unit, where the restart unit sets the number of times that the switching elements are switched per unit time to be lower when the determination unit determines that the pressure difference is equal to or above the threshold as compared to when the determination unit determines that the pressure difference is less than the threshold.
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公开(公告)号：US10746448B2
公开(公告)日：2020-08-18
申请号：US15495269
申请日：2017-04-24
Applicant: TRANE INTERNATIONAL INC.
Inventor： Benjamin James Sykora , Nathan Thomas West , David Marshall Foye , Dennis Myron Beekman , Korwin Jay Anderson , Robert Bakkestuen
IPC: F25B49/02 , F04C28/28 , F04C18/16 , F25B31/02 , F04C18/02 , F04C28/04 , F04C28/08 , F04C29/00 , G05D23/00 , F25B1/00
Abstract: A system includes a refrigerant compressor, an electric motor and configured to drive the refrigerant compressor, and a controller. The controller is configured to operate the compressor in a liquid clearing start mode where electrical current through the motor is prevented from exceeding a predetermined current limit for a period of time not to exceed a predetermined period of time, and is configured to operate the compressor in a run mode in response to determining the motor exceeds a predetermined speed threshold at or before expiration of the predetermined period of time, wherein the run mode does not prevent electrical current through the motor from exceeding said predetermined current limit.
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公开(公告)号：US10738799B2
公开(公告)日：2020-08-11
申请号：US15315592
申请日：2015-06-02
Applicant: PROJECT PHOENIX, LLC
Inventor： Thomas Afshari
IPC: F15B11/10 , F15B15/18 , F04C2/18 , F04C15/00 , F04C15/06 , F04C28/08 , F15B1/26 , F15B11/00 , F15B15/14 , E02F3/42 , E02F9/22 , F04C2/14
Abstract: A linear actuator system includes a linear actuator and an integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with two fluid drivers, each fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes the pump in a normal mode of operation in which the prime movers are independently driven and switches to a fail-safe mode of operation in which only one prime mover is operated.
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公开(公告)号：US20200232355A1
公开(公告)日：2020-07-23
申请号：US16628889
申请日：2018-07-17
Applicant: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
Inventor： Wim MEEUSEN , Edwin ROSKAM
Abstract: Machine provided with a machine element (2) and an oil pump (4) and a motor (3) to drive the machine element (2) and the oil pump (4), whereby the oil pump (4) is provided with a shaft (13) with a rotor (12), whereby the oil pump (4) is provided to pump oil from an oil reservoir (5) via an inlet channel (8) to nozzles that lead into the motor (3) and/or machine element (2) to lubricate and/or cool one or more bearings or other machine components, characterized in that in the inlet channel (8), near the oil pump (4) a dam (16) is provided that is higher than the height (A) of the central axis (18) of the shaft (13) of the oil pump (4) minus the smallest diameter (B) of the rotor (12) of the oil pump (4) divided by two.
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