公开(公告)号：US12123412B2

公开(公告)日：2024-10-22

申请号：US18042696

申请日：2020-08-28

Applicant: Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd

Inventor： Andries Daniel Jozef De Bock ,  Xibo Liu ,  Quanxi Jiang ,  Xin Dai

IPC: F04C19/00 ,  F04C28/24 ,  F04C28/28

CPC classification number: F04C19/004 ,  F04C19/00 ,  F04C28/24 ,  F04C28/28 ,  F04C2270/18 ,  F04C2270/19 ,  F04C2270/205 ,  F04C2270/86

Abstract: A control system comprising: a suction line; an exhaust line; an operating liquid line; a liquid ring pump coupled to the suction, exhaust, and operating liquid lines; a regulating device configured to control flow of operating liquid into the liquid ring pump; a pressure sensor configured to measure a pressure of an input fluid to the liquid ring pump via the suction line; a first temperature sensor configured to measure temperature of an exhaust fluid output by the liquid ring pump via the exhaust line; a second temperature sensor configured to measure temperature of an operating liquid received by the liquid ring pump via the operating liquid line; and a controller configured to: using the sensor measurements control the one or more regulating devices.

公开(公告)号：US20240200545A1

公开(公告)日：2024-06-20

申请号：US18028993

申请日：2021-09-02

Applicant: KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GMBH

Inventor： Ehsan AFSHAR ,  Stefan LANGE Stefan LANGE ,  Adrian KRAMLICH ,  Rainer STROMAYR ,  Michael KRAMER

IPC: F04B39/02 ,  F04B49/02 ,  F04C28/28

CPC classification number: F04B39/0207 ,  F04C28/28 ,  F04B49/02 ,  F04B2201/0404

Abstract: A method for monitoring an oil level of an oil-lubricated compressor, the method including: reading at least one oil level sensor, by which an oil level representing the compressor oil level is detected; checking compliance with at least one predetermined verification criterion for verification of the read-out oil level; and relaying an oil level signal if the read-out oil level complies with at least one relaying criterion according to whether the oil level reaches or falls below a predetermined oil level and with the at least one verification criterion.

公开(公告)号：US20240077079A1

公开(公告)日：2024-03-07

申请号：US18508671

申请日：2023-11-14

Applicant: EBARA CORPORATION

Inventor： Keiji MAISHIGI ,  Tetsuro SUGIURA ,  Katsuaki USUI ,  Masahiro HATAKEYAMA ,  Chikako HONMA ,  Toru OSUGA ,  Koichi IWASAKI ,  Jie Yuan LIN

IPC: F04C28/28 ,  F04D27/00 ,  G06F9/54 ,  G06F17/18

CPC classification number: F04C28/28 ,  F04D27/001 ,  G06F9/542 ,  G06F17/18

Abstract: An information processing apparatus detecting presence or absence of abnormality of a vacuum pump derived from a product produced within a target vacuum pump, including: a determination unit configured to determine a normal variation range or a normal time variation behavior of a target state quantity which is a state quantity varying depending on a load of gas flowing into the vacuum pump, based on at least one of past target state quantities of the target vacuum pump or another vacuum pump; and a comparison unit configured to compare a current target state quantity of the target vacuum pump with the normal variation range or the normal time variation behavior and output the comparison result.

公开(公告)号：US11852145B2

公开(公告)日：2023-12-26

申请号：US16728570

申请日：2019-12-27

Applicant: Trane International Inc.

Inventor： Jay H. Johnson ,  John R. Sauls ,  Gordon Powell ,  Daniel R. Crum

IPC: F04C29/12 ,  F04C28/14 ,  F04C28/12 ,  F04C28/28 ,  F04C28/24 ,  F04C28/08 ,  F04C18/16 ,  F25B1/047 ,  F25B49/02

CPC classification number: F04C29/124 ,  F04C18/16 ,  F04C28/08 ,  F04C28/12 ,  F04C28/14 ,  F04C28/24 ,  F04C28/28 ,  F25B1/047 ,  F25B49/022 ,  F04C2240/403 ,  F04C2240/81 ,  F04C2270/025 ,  F04C2270/585 ,  F25B2600/0253

Abstract: Systems and methods are used to control operation of a rotary compressor of a refrigeration system to improve efficiency by varying the volume ratio and the speed of the compressor in response to current operating and load conditions. The volume of the axial and/or radial discharge ports of the compressor can be varied to provide a volume ratio corresponding to operating conditions. In addition, permanent magnet motors and/or control of rotor tip speed can be employed for further efficiency gains.

公开(公告)号：US11808261B2

公开(公告)日：2023-11-07

申请号：US17285802

申请日：2018-12-14

Applicant: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI

Inventor： Hua Liu ,  Longfei Li ,  Handong Xue ,  Yi Ni ,  Yingsheng Fu ,  Yaopeng Rong ,  Zhongqiu Zhang ,  Qunbo Liu ,  Ke Xu

IPC: F04B51/00 ,  F04B25/00 ,  F04B49/06 ,  F04C23/00 ,  F04C28/06 ,  F04C28/08 ,  F04C28/28 ,  F04B41/00 ,  F04C18/356 ,  F04C18/344 ,  F04C28/02

CPC classification number: F04B51/00 ,  F04B25/005 ,  F04B49/065 ,  F04C23/001 ,  F04C28/065 ,  F04C28/08 ,  F04C28/28 ,  F04B41/00 ,  F04B2203/0201 ,  F04B2203/0204 ,  F04C18/344 ,  F04C18/356 ,  F04C28/02 ,  F04C2270/075 ,  F04C2270/095

Abstract: Disclosed are a variable capacity compressor operation mode determination method and device, a variable capacity compressor and an air conditioner. The variable capacity compressor operation mode determination method includes: detecting a current value of a compressor at present as A1 before switching an operation mode of the compressor; detecting the current value of the compressor at present as A2 after switching the operation mode of the compressor and reaching a preset time; comparing A1 and A2, determining that the switching of the operation mode of the compressor is successful when a ratio relationship between A1 and A2 satisfies a preset condition, and determining that switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies a preset condition.

公开(公告)号：US20230304498A1

公开(公告)日：2023-09-28

申请号：US18189523

申请日：2023-03-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Kenta SATO

IPC: F04C28/28 ,  G01P15/18

CPC classification number: F04C28/28 ,  G01P15/18 ,  F04C2270/80

Abstract: A diagnosis method includes: a physical quantity detection step of detecting a physical quantity generated in a diagnosis target by using a physical quantity sensor; a Lissajous figure generation step of generating a three-dimensional Lissajous figure by plotting the physical quantity detected in the physical quantity detection step in a three-dimensional coordinate system including a first axis, a second axis, and a third axis; a vibration plane information acquisition step of acquiring information on a vibration plane of the vibration from the three-dimensional Lissajous figure generated in the Lissajous figure generation step; and a diagnosis step of diagnosing a state of the diagnosis target based on the information on the vibration plane acquired in the vibration plane information acquisition step.

公开(公告)号：US20180306188A1

公开(公告)日：2018-10-25

申请号：US15952341

申请日：2018-04-13

Applicant: Abac Aria Compressa S.p.A.

Inventor： Maarten Van Acker

IPC: F04C28/06 ,  F04B49/06

CPC classification number: F04C28/06 ,  F04B35/04 ,  F04B37/14 ,  F04B49/065 ,  F04B2201/1203 ,  F04B2203/0201 ,  F04B2205/05 ,  F04C18/16 ,  F04C28/28 ,  F04C2240/40 ,  F04C2270/07 ,  F04C2270/18

Abstract: A compressor provided with a compressor element, a motor configured to drive said compressor element and an electronic pressure switch. The electronic pressure switch includes a pressure sensor; a current sensor; a microprocessor unit including a first input port and a second input port; a first communication unit; and a second communication unit. The electronic pressure switch includes a housing. The microprocessor unit, the pressure sensor, the current sensor, the first communication unit and the second communication unit are integrated in said housing.

公开(公告)号：US20180266422A1

公开(公告)日：2018-09-20

申请号：US15831331

申请日：2017-12-04

Applicant: ATAI FUJI MOTOR CO., LTD.

Inventor： Chi-Feng Sun ,  Ching-Yuan Lin

IPC: F04C28/28

CPC classification number: F04C28/28 ,  F04C18/16 ,  F04C29/042 ,  F04C29/06 ,  F04C29/124 ,  F04C2220/12 ,  F04C2240/81 ,  F04C2270/07 ,  F04C2270/10 ,  F04C2270/18 ,  F04C2270/19 ,  F04C2270/20 ,  F04C2270/90

Abstract: A pump apparatus and a pump apparatus monitoring system are disclosed. The pump apparatus monitoring system includes a cloud server, a remote electronic device, a near end electronic device and a pump apparatus. The pump apparatus includes a control module and at least one parameter sensor. The parameter sensor is for sensing at least one parameter of the pump apparatus. The control module transmits the at least one parameter to the near end electronic device. The near end electronic device uploads the at least one parameter to the cloud server via a network. The remote electronic device downloads the at least one parameter from the cloud server via the network. Accordingly, staff at the remote end is able to get parameters of the pump apparatus by the remote electronic device, so as to adjust the pump apparatus.

公开(公告)号：US10060435B2

公开(公告)日：2018-08-28

申请号：US15181932

申请日：2016-06-14

Applicant: MAN Diesel & Turbo SE

Inventor： Jürgen Wennemar

IPC: F03C2/00 ,  F03C4/00 ,  F04C2/00 ,  F04C29/00 ,  F04C18/16 ,  F04C28/28 ,  F04C29/02 ,  F04C29/04 ,  F04C27/00 ,  F04C28/24

CPC classification number: F04C29/0014 ,  F04C18/16 ,  F04C27/004 ,  F04C28/24 ,  F04C28/28 ,  F04C29/021 ,  F04C29/042 ,  F04C2240/81 ,  F04C2270/215

Abstract: A screw machine, in particular screw compressor, includes a machine housing, screw rotors forming a rotor pair which is mounted in the machine housing, an oil supply system via which bearings and seals of the screw rotors can be supplied with oil for lubricating and/or cooling, wherein the oil supply system has an oil supply and oil feeds, wherein the oil supply system includes a pressure sensor, which detects a pressure in the oil discharge or oil return or a pressure difference between the pressure in the oil discharge or oil return and a pressure in the oil feeds, the oil supply system furthermore includes a control device, which open-loop or closed-loop controls the pressure in the oil feed or the pressure difference dependent on the measurement signal of the pressure sensor.

公开(公告)号：US20180238328A1

公开(公告)日：2018-08-23

申请号：US15749884

申请日：2016-08-04

Applicant: Edwards Limited

Inventor： Phillip North ,  Kanstantinos Karoulas ,  Benjamin Raymond Wooller ,  Alan Ernest Kinnaird Holbrook

IPC: F04C18/12 ,  F04C28/28

CPC classification number: F04C18/12 ,  F04C28/28 ,  F04C2220/12 ,  F04C2240/81 ,  F04C2270/17

Abstract: A dry vacuum pump may include a stator which defines an internal chamber in which a rotor is rotationally mounted. A sensor is mounted to the stator and has an output connected to a processing circuit arranged to analyse the output of the sensor to determine the absolute distance between a point on the surface of the rotor and internal stator surface. The rotor to stator clearance can thus be accurately determined in real time during operation of the pump, so that the pump performance can be optimised over its serviceable life.