公开(公告)号：US20240218878A1

公开(公告)日：2024-07-04

申请号：US18400023

申请日：2023-12-29

Applicant: Danfoss (Tianjin) Ltd.

Inventor： Yingke SUN ,  Wanzhen LIU ,  Qingyue MENG ,  Li YAO ,  Shizhong JI

IPC: F04C28/08 ,  F04C18/02 ,  F04C28/28 ,  F04D29/66 ,  G01H1/00

CPC classification number: F04C28/08 ,  F04C18/0215 ,  F04C28/28 ,  F04D29/661 ,  G01H1/003 ,  F04C2270/051 ,  F04C2270/125 ,  F04C2270/86

Abstract: A control method includes: a detection step of: detecting a vibration amplitude of the compressor; a determination step of: determining whether the detected vibration amplitude of the compressor is greater than or equal to a predetermined threshold; and a speed adjustment step of changing a switching frequency of a frequency converter or/and modulate a frequency of the compressor if the detected vibration amplitude of the compressor is greater than or equal to the predetermined threshold. A compressor system is also provided by an embodiment. The control method and the compressor system make it convenient to know whether abnormal vibration of the compressor occurs, and can avoid the resonance frequency range.

公开(公告)号：US12025119B2

公开(公告)日：2024-07-02

申请号：US16961703

申请日：2019-02-21

Applicant: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP

Inventor： Guy L. A. Snels

IPC: F04B49/22 ,  F04B49/08 ,  F04B49/20 ,  F04C28/06 ,  F04C28/08

CPC classification number: F04B49/225 ,  F04B49/08 ,  F04C28/06 ,  F04C28/08 ,  F04B49/20 ,  F04B2203/0209 ,  F04B2205/05

Abstract: A method for actuating a compressor system in order to set a measured operating pressure, which serves as a measure for the operating pressure that the compressor system supplies to a user network at a flow rate demanded by a user network, to a desired operating pressure. The compressor system includes a compressor element with an inlet and an outlet. The compressor element is driven by a drive. The compressor system is provided with a way for throttling the inlet of the compressor element. As long as an operating pressure p, selected from the measured operating pressure pw and the desired operating pressure pset, is higher than the maximum obtainable operating pressure pw,max for the aforementioned compressor system, the inlet is throttled for at least a specific percentagexgreater than zero.

公开(公告)号：US11988211B2

公开(公告)日：2024-05-21

申请号：US17263957

申请日：2019-08-01

Applicant: Leybold GmbH

Inventor： Joeri Coeckelbergs ,  Vicente Paul Guerrero Lule

IPC: F04C28/08 ,  F04C25/02 ,  F04C28/28

CPC classification number: F04C28/08 ,  F04C25/02 ,  F04C28/28 ,  F04C2240/81

Abstract: A vacuum pump includes a housing having an inlet and an outlet, at least one rotor arranged in the housing configured to convey a gaseous medium from the inlet to the outlet, a motor configured to rotate the rotor, a control device connected to the motor configured to control the motor, and at least one sensor connected to the control device. The at least one sensor is configured to sense at least one operating parameter of the vacuum pump. The control device comprises a correlation module. The correlation module is configured to correlate the sensed at least one operating parameter with at least one critical parameter. The motor is controlled on the basis of the at least one critical parameter.

公开(公告)号：US11953006B2

公开(公告)日：2024-04-09

申请号：US17421699

申请日：2019-08-20

Applicant: York (Wuxi) Air Conditioning and Refrigeration Co., Ltd. ,  Johnson Controls Tyco IP Holdings LLP

Inventor： Yu Zhu ,  Zhengxiang Yu ,  Fanfei Zeng ,  Fengzhi Zhang

IPC: F04C18/16 ,  F04C28/08 ,  F04C28/12

CPC classification number: F04C18/16 ,  F04C28/08 ,  F04C28/12

Abstract: A screw compressor (100), comprising a screw rotor (110) and a spool valve (120). The screw rotor (110) comprises a suction head end (111) and an exhaust tail end (112). Gas is sucked in from the suction head end (111) and compressed gas is discharged from the exhaust tail end (112). The spool valve (120) comprises a working side (125) for sealing a compression chamber of the screw rotor (110). The working side (125) comprises a spool valve head end (121) and a spool valve tail end (122) and can do a reciprocating motion along the axis direction of the screw rotor (110). When the spool valve (120) moves to a suction capacity adjusting position (240), the spool valve head end (121) is located at the inner side of the suction head end (111) of the screw rotor (110), and a suction capacity adjusting distance (D2) is formed between the spool valve head end (121) and the suction head end (111) so that the suction capacity of the screw compressor is adjusted. The suction capacity of the screw compressor (100) can be adjusted by means of the spool valve (120), so that the problem of motor temperature and exhaust gas temperature limits of conventional variable frequency screw sets is effectively solved and the operational range and the load regulation ability of the screw compressor are expanded.

公开(公告)号：US20230400025A1

公开(公告)日：2023-12-14

申请号：US18335122

申请日：2023-06-14

Applicant: MMLJ, Inc.

Inventor： Benjamin LeCompte

IPC: F04C28/08 ,  F04C28/28 ,  F04C28/06

CPC classification number: F04C28/08 ,  F04C28/28 ,  F04C28/06 ,  F04C2210/1005 ,  F04C2270/035 ,  F04C2270/0525 ,  F04C2270/44

Abstract: A variable air compressor assembly for selectively generating a compressed air with a compressor and an electric motor while monitoring an RPM sensor, a motor load sensor, a pressure sensor and an air flow sensor and modifying a control signal for said compressor, said electric motor and a belt drive assembly is disclosed. Comprising said variable air compressor assembly comprises a controller, an air intake, said compressor, said electric motor, said belt drive assembly, an air outlet, a power source and a device application. said device application receives of a sensor data from a portion of said RPM sensor, said motor load sensor, said pressure sensor and said air flow sensor and generates said control signal to control said compressor, said electric motor and said belt drive assembly according to a power management system in said device application.

公开(公告)号：US11761443B2

公开(公告)日：2023-09-19

申请号：US17257721

申请日：2019-06-04

Applicant: Hitachi Industrial Equipment Systems Co., Ltd.

Inventor： Yuya Ota ,  Tomoo Suzuki ,  Yoshio Anzai

IPC: F04C28/28 ,  F04C23/00 ,  F04C28/08 ,  F04C29/00 ,  F04C29/04 ,  F04C18/16

CPC classification number: F04C28/28 ,  F04C23/001 ,  F04C28/08 ,  F04C29/0092 ,  F04C29/04 ,  F04C18/16 ,  F04C2210/221 ,  F04C2240/81 ,  F04C2270/0525 ,  F04C2270/18 ,  F04C2270/19 ,  F04C2270/80 ,  F04C2270/90

Abstract: Provided are a compressor and a monitoring system that can specify a cause of an anomaly of a sensed value of a sensor. A compressor (1) includes: a temperature sensor (11A) that senses a temperature of a compressed air on a discharge side of a low-pressure-stage compressor body (3) and on an upstream side of an intercooler (5); a pressure sensor (12A) that senses a pressure of the compressed air on the discharge side of the low-pressure-stage compressor body (3); a temperature sensor (11B) that senses a temperature of the compressed air on an intake side of a high-pressure-stage compressor body (6) and on a downstream side of the intercooler (5); a temperature sensor (11C) that senses a temperature of the compressed air on a discharge side of the high-pressure-stage compressor body (6); a controller (8) that decides whether or not an anomaly has occurred in sensed values of the sensors (11A), (11B), (11C), and (12A), and estimates a cause of the anomaly; and a display device (9) that displays the cause of the anomaly estimated by the controller (8).

公开(公告)号：US11686310B2

公开(公告)日：2023-06-27

申请号：US17536562

申请日：2021-11-29

Applicant: GARDNER DENVER DEUTSCHLAND GMBH

Inventor： Ulrich Thomes

IPC: F04C28/08 ,  F04C28/24 ,  F04C18/16 ,  F04C23/00 ,  F04C28/06 ,  F04C28/02

CPC classification number: F04C28/08 ,  F04C18/16 ,  F04C23/003 ,  F04C28/02 ,  F04C28/06 ,  F04C28/24 ,  F04C2240/402 ,  F04C2270/02 ,  F04C2270/052 ,  F04C2270/18 ,  F04C2270/20 ,  F04C2270/44

Abstract: The invention relates to a method for controlling a rotary screw compressor, having at least a first and a second air-end, wherein both air-ends are driven separately from one another and speed controlled. According to the invention, the following steps are carried out: detection of a volume flow taken at the outlet of the second air-end; adjustment of the rotational speed of both air-ends, when the removed volume flow fluctuates in a range between a maximum value and a minimum value; opening of a pressure-relief valve, if the volume flow falls below the minimum value; and reduction of the rotational speed of at least the first air-end to a predetermined idling speed (V1L) to reduce the volumetric flow delivered by the first to the second air-end.

公开(公告)号：US10001311B2

公开(公告)日：2018-06-19

申请号：US15120964

申请日：2015-12-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenji Ohnishi ,  Hiroaki Kase ,  Mitsuhiro Fukuda ,  Masaki Sumi ,  Katsumi Endou ,  Shigetomi Tokunaga

IPC: F25B1/00 ,  F25B49/00 ,  F25B49/02 ,  F04B39/02 ,  F04B49/06 ,  F04C28/08 ,  F25D17/06

CPC classification number: F25B49/022 ,  F04B39/023 ,  F04B49/065 ,  F04B2203/0209 ,  F04B2207/03 ,  F04C28/08 ,  F04C2240/403 ,  F25B49/025 ,  F25B2500/19 ,  F25B2600/021 ,  F25B2600/025 ,  F25B2600/0253 ,  F25B2600/112 ,  F25B2700/21 ,  F25D17/065 ,  F25D2700/12 ,  Y02B30/741 ,  Y02B30/743

Abstract: A simple inverter-controlled refrigerator includes temperature detector (17), constant speed main body control unit (12) whose power is turned on/off by temperature detector (17), and that can drive a constant speed compressor, inverter control unit (14) that is connected to constant speed main body control unit (12), and that is operated, based on a power on/off signal of constant speed main body control unit (12). And variable speed compressor (8) that is connected to inverter control unit (14), and that is controlled, based on an output from inverter control unit (14). Inverter control unit (14) has rotation speed setting unit (23) which is operated, based on the power on/off signal of constant speed main body control unit (12), and which is configured to set a rotation speed of variable speed compressor (8), and inverter drive circuit unit (24) which drives variable speed compressor (8) at the rotation speed set by rotation speed setting unit (23).

公开(公告)号：US20170284409A1

公开(公告)日：2017-10-05

申请号：US15468307

申请日：2017-03-24

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Takashi KAWASHIMA ,  Yoshiki NAGATA ,  Kazuki NAJIMA

IPC: F04D27/00 ,  F04C28/08 ,  B60H1/32 ,  F04B27/08 ,  F04B35/04 ,  F04B49/20 ,  F04D25/06 ,  F04C29/00

CPC classification number: F04D27/004 ,  B60H1/3205 ,  B60H1/3222 ,  B60H2001/3272 ,  B60H2001/3292 ,  F04B27/08 ,  F04B35/04 ,  F04B49/02 ,  F04B49/06 ,  F04B49/20 ,  F04C23/008 ,  F04C28/08 ,  F04C29/0085 ,  F04C2240/40 ,  F04C2240/403 ,  F04C2270/051 ,  F04C2270/0525 ,  F04C2270/605 ,  F04D25/0673

Abstract: The control section controls the electric motor to be driven such that the number of revolutions becomes equal to the target number of revolutions. If the control section sets the target number of revolutions to a number of revolutions of the electric motor requested by another control section, the control section changes the number of revolutions of the electric motor at an increase rate lower than or equal to the upper limit value of the increase rate or at a decrease rate lower than or equal to the upper limit value of the decrease rate. If the control section sets the target number of revolutions to a number-of-revolutions limit value, which is determined based on the voltage of a vehicle battery, the control section is able to decrease the number of revolutions of the electric motor at a decrease rate exceeding the upper limit value.

公开(公告)号：US20170191475A1

公开(公告)日：2017-07-06

申请号：US15461927

申请日：2017-03-17

Applicant: TRANE INTERNATIONAL INC.

Inventor： John Qianghua Zhou ,  Roger Joseph Voorhis ,  Caleb Ryan Joiner ,  Benjamin Hayes ,  James Philip Crolius ,  William Hansen

IPC: F04B49/06 ,  F25B49/02 ,  F04D27/00 ,  F04B49/20 ,  F04C28/08

CPC classification number: F04B49/065 ,  F04B27/14 ,  F04B49/20 ,  F04B2203/0209 ,  F04B2205/11 ,  F04C28/08 ,  F04C2270/051 ,  F04D27/004 ,  F04D27/0269 ,  F25B49/022 ,  F25B2400/0751 ,  F25B2600/0251 ,  F25B2600/0253 ,  Y02B30/741

Abstract: A system and method for controlling a system that includes fixed speed and variable speed compressors are described. The method generally allows the system, for example, a heating, ventilating, and air condition (HVAC) system that includes fixed speed and variable speed compressors, to maximize unit modulating capability. The method allows the use of a variable speed compressor that is relatively smaller, which can lead to cost savings, easier installation, manufacturing, etc.