| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | OIL-FLOODED SCREW COMPRESSOR, MOTOR DRIVE SYSTEM, AND MOTOR CONTROL | US13932149 | 2013-07-01 | US20130294932A1 | 2013-11-07 | Hirotaka Kameya; Masaru Yamasaki; Toshiyuki Ajima; Masaharu Senoo; Hideharu Tanaka; Norinaga Suzuki |
| An oil-flooded screw compressor drives a pair of rotors at a rotational speed which is low enough not to increase torque for a short amount of time after start-up and accelerates the pair of rotors up to a normal-operation rotational speed after oil discharge. Alternatively, the oil-flooded screw compressor rotates the pair of rotors for a short amount of time after the remaining compressed gas is discharged after a halt, thereby allowing the oil accumulated inside the working chambers to be discharged and ensuring smooth start-up after the halt. | ||||||
| 22 | POSITIVE DISPLACEMENT COMPRESSOR | US13816405 | 2011-09-29 | US20130136640A1 | 2013-05-30 | Hiroshi Hasegawa; Atsuo Okaichi; Takeshi Ogata |
| A rotary compressor 100 includes a compression mechanism 3, a motor 2, a suction path 14, a return path 16, a volume varying mechanism 30, an inverter 42, and a controller 44. The return path 16 serves to return a working fluid from the working chamber 25 to the suction path 14. The volume varying mechanism 30 is provided in the return path 16, permits the working fluid to return from the working chamber 25 to the suction path 14 through the return path 16 when the suction volume of the compression mechanism 3 should be set to a relatively small value, and prohibits the working fluid from returning from the working chamber 25 to the suction path 14 through the return path 16 when the suction volume should be set to a relatively large value. The volume varying mechanism 30 and the inverter 42 are controlled so as to compensate for a decrease in the suction volume with an increase in the rotational speed of the motor 2. | ||||||
| 23 | Start-up control device and method for electric scroll compressor | US12602449 | 2008-05-21 | US08342810B2 | 2013-01-01 | Shigeyuki Koyama |
| A device executing a start-up control method for an electric scroll compressor has a thermistor (18) and a pressure sensor (20) which, prior to the start-up of the scroll compression unit, detect temperature and pressure of a suction refrigerant introduced into the compression unit (2), and a controller (10) for controlling driving of a motor (4) of the compression unit (2) at the start-up of the compressor. The controller (10) determines at the start-up of the compressor whether or not a liquid refrigerant exists in the compression unit (2) on the basis of the detected temperature and pressure; selects either a normal start-up mode or a liquid-discharge mode in which the rotational speed of the motor (4) is regulated to be lower than in the normal start-up mode, according to the determination result; and controls the start-up of the compression unit (2) through the motor (4) according to the selected mode. | ||||||
| 24 | OIL-FLOODED SCREW COMPRESSOR, MOTOR DRIVE SYSTEM, AND MOTOR CONTROL DEVICE | US12533097 | 2009-07-31 | US20100028165A1 | 2010-02-04 | Hirotaka KAMEYA; Masaru Yamasaki; Toshiyuki Ajima; Masaharu Senoo; Hideharu Tanaka; Norinaga Suzuki |
| When an oil-flooded screw compressor is started up in a cold environment after a long halt, start-up torque increases due to the increased viscosity of the oil that has long stayed inside the working chambers of the compressor. This has necessitated drive means with a larger capacity than that required for normal operation.An oil-flooded screw compressor according to the invention comprises: a casing; a pair of rotors each having screw-thread-shaped groove and being housed in the casing; an electric motor for rotationally driving the pair of rotors; a control device for controlling the electric motor; an oil feeding mechanism for feeding oil into working chambers formed by being enclosed by the casing and the pair of rotors in which teeth thereof are meshed to each other; and an oil separating mechanism for separating the oil from compressed gas discharged from the working chambers. The oil-flooded screw compressor drives the pair of rotors at a rotational speed which is low enough not to increase torque for a short amount of time after start-up and accelerates the pair of rotors up to a normal-operation rotational speed after oil discharge. Alternatively, the oil-flooded screw compressor rotates the pair of rotors for a short amount of time after the remaining compressed gas is discharged after a halt, thereby allowing the oil accumulated inside the working chambers to be discharged and ensuring smooth start-up after the halt. | ||||||
| 25 | METHOD IN A MILKING SYTEM FOR CREATING A REQUIRED VACUUM LEVEL AND COMPUTER PROGRAM PRODUCTS | US12450069 | 2008-04-02 | US20100018465A1 | 2010-01-28 | Henrik Idensjö |
| The invention relates to a method in a milking system for creating a required vacuum level, the milking system comprising at least two variable speed vacuum pumps P1, P2. The method comprises the steps of: utilizing a first variable speed vacuum pump P1 for creating the required vacuum level within the milking system; monitoring the vacuum level requirement within the milking system, and when the vacuum level requirement of the milking system is such that the speed of the first variable speed vacuum pump P1 reaches a first speed threshold then: starting a second variable speed vacuum pump P2, and running the first and second variable speed vacuum pumps P1, P2 in parallel for creating the required vacuum level. The invention also relates to computer program products. | ||||||
| 26 | Rotary compressor unit and method of controlling operation thereof | EP08002967.1 | 2008-02-18 | EP1975415A3 | 2012-05-23 | Kimura, Hideyuki |
The compressor unit having at least two compressors, for example a low pressure stage compressor (11) and a high pressure stage compressor (12) connected in series, of which the low pressure sage compressor (11) and high pressure stage compressor (12) are driven by driving devices (13 and 14) respectively separately or driven by a single driving device (41) via variable speed gears (43 and 44) respectively connected to each of the compressors, and rotation speed of the low pressure stage compressor (11) and that of the high pressure stage compressor (12) are controlled independently in accordance with various operating conditions of the compressor unit so that optimal load balancing of the compressors (11 and 12) is always achieved.
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| 27 | SYSTEM AND METHOD FOR PERFORMING COOLING | EP95938683.0 | 1995-11-17 | EP0792434A1 | 1997-09-03 | THURESSON, Erik; ÖHMAN, Henrik |
| The invention relates to a refrigeration system of the air cycle cooling system type, also called reversed Brayton cycle in which the air flows through compressor means (12, 16), heat exchanger means (24) for withdrawal of heat from the compressed air and finally expander means (22) from where it is delivered to perform cooling. According to the invention the system includes heat load means (41) having a large flow resistance, creating a considerable over-pressure at the expander outlet (23). A rotary screw machine is included in the expander means (22) and also in the compressor means (12, 16), which latter screw rotor machine (12) is driven solely by the screw rotor machine (22) of said expander means. A screw rotor machine (16) connected in parallel with the screw rotor machine (12) of said compressor means is driven separately, preferably by a drive engine (19), the rotational speed of which is controlled by pressure sensing means (36) in a conduit between the expander outlet (23) and an inlet to the heat load means (41), and thereby - via said expander means - also drives the velocity of the screw rotor machine (12) of said compressor means. The sytem is particularly intended for cooling the electronic equipment in aircraft when being on the ground. | ||||||
| 28 | System and method for control and optimization of PCP pumped well operating parameters | US14325794 | 2014-07-08 | US10107286B2 | 2018-10-23 | Bernardo Martin Mancuso; Kelly Alexander Woolsey |
| A method of controlling the production efficiency of a well includes determining one or more parameters of a pump model for a pump of the well, determining an inflow rate of liquid into the well, and adjusting a pumping speed of the pump based on the one or more parameters of the pump model to maintain a outflow rate of liquid from the well at a desired fraction of the inflow rate. | ||||||
| 29 | METHOD FOR REGULATING THE ROTATIONAL SPEED OF A COMPRESSOR AS A FUNCTION OF THE AVAILABLE GAS FLOW OF A SOURCE AND REGULATION THEREBY APPLIED | US15755273 | 2016-08-11 | US20180283379A1 | 2018-10-04 | Hans Theo MAGITS; Subodh Sharadchandra PATWARDHAN |
| A method for controlling the speed of a compressor with a controller as a function of the available gas flow comprising the following steps: setting a desired value for the inlet pressure; determining the inlet pressure; determining the speed; controlling the speed of the compressor by reducing or increasing it depending on whether the inlet pressure is less than or greater than the set desired value until the inlet pressure is equal to the set desired value; providing the characteristic data of the compressor relating to the efficiency and/or the Specific Energy Requirement (SER) as a function of the speed and the inlet pressure; adjusting the desired value of the inlet pressure on the basis of the aforementioned characteristic data and in such a way that the efficiency of the compressor is a maximum or the SER is a minimum. | ||||||
| 30 | METHOD FOR CONTROLLING MOTOR-DRIVEN COMPRESSOR CONFIGURED TO BE INSTALLED IN VEHICLE | US15468307 | 2017-03-24 | US20170284409A1 | 2017-10-05 | Takashi KAWASHIMA; Yoshiki NAGATA; Kazuki NAJIMA |
| 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. | ||||||
| 31 | SYSTEM AND METHOD FOR CONTROLLING A SYSTEM THAT INCLUDES FIXED SPEED AND VARIABLE SPEED COMPRESSORS | US15461927 | 2017-03-17 | US20170191475A1 | 2017-07-06 | John Qianghua Zhou; Roger Joseph Voorhis; Caleb Ryan Joiner; Benjamin Hayes; James Philip Crolius; William Hansen |
| 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. | ||||||
| 32 | GEAR PUMP | US15255945 | 2016-09-02 | US20170184095A1 | 2017-06-29 | David BROOKES; Martin K. YATES |
| A gear pump has first and second meshing gears for pumping a fluid. The gear pump further has a first electrical motor having a first rotor, a first stator and first coil windings. The gear pump further has a second electrical motor having a second rotor, a second stator and second coil windings. The first rotor is operatively connected to the first gear and the second rotor is operatively connected to the second gear such that each gear is rotated by its respective rotor. The first and second coil windings are energised by respective and separate first and second electrical power circuits such that the first and second meshing gears can be driven independently of each other. | ||||||
| 33 | VACUUM PUMP, VACUUM EXHAUST DEVICE, AND METHOD OF OPERATING VACUUM PUMP | US14002308 | 2012-03-02 | US20130343912A1 | 2013-12-26 | Kazuya Miyata; Yuusaku Tanabe; Syuusuke Uehara |
| [Object] To provide a vacuum pump, a vacuum exhaust device, and a method of operating a vacuum pump that are capable of achieving a stable exhausting operation without causing a step-out.[Solving Means] Provided is a method of operating a vacuum pump including a rotor (21, 22), a drive motor (35), and a magnetic coupling (50) configured to transmit a rotational force of the drive motor to the rotor at a rotational torque equal to or smaller than a first threshold value (Th1). The method includes detecting a load torque of the drive motor (35). The number of revolutions of the drive motor (35) is increased when the load torque is equal to or smaller than a second threshold value (Th2) that is smaller than the first threshold value (Th1). The number of revolutions of the drive motor (35) is reduced when the load torque exceeds the second threshold value (Th2) and is equal to or smaller than the first threshold value (Th1). | ||||||
| 34 | ROTARY COMPRESSOR UNIT AND METHOD OF CONTROLLING OPERATION THEREOF | US12058902 | 2008-03-31 | US20080240953A1 | 2008-10-02 | Hideyuki KIMURA |
| The compressor unit having at least two compressors, for example a low pressure stage compressor 11 and a high pressure stage compressor 12 connected in series, of which the low pressure sage compressor 11 and high pressure stage compressor 12 are driven by driving devices 13 and 14 respectively separately or driven by a single driving device 41 via variable speed gears 43 and 44 respectively connected to each of the compressors, and rotation speed of the low pressure stage compressor 11 and that of the high pressure stage compressor 12 are controlled independently in accordance with various operating conditions of the compressor unit so that optimal load balancing of the compressors 11 and 12 is always achieved. | ||||||
| 35 | METHOD AND APPARATUS IN CONNECTION WITH A SCREW COMPRESSOR | EP15176847.0 | 2015-07-15 | EP3118458B1 | 2017-08-30 | Kosonen, Antti; Ahola, Jero |
| 36 | A METHOD IN A MILKING SYSTEM FOR CREATING A REQUIRED VACUUM LEVEL AND COMPUTER PROGRAM PRODUCTS | EP08724160 | 2008-04-02 | EP2131648A4 | 2014-07-16 | IDENSJÖ HENRIK |
| The invention relates to a method in a milking system for creating a required vacuum level, the milking system comprising at least two variable speed vacuum pumps P1, P2. The method comprises the steps of: utilizing a first variable speed vacuum pump P1 for creating the required vacuum level within the milking system; monitoring the vacuum level requirement within the milking system, and when the vacuum level requirement of the milking system is such that the speed of the first variable speed vacuum pump P1 reaches a first speed threshold then: starting a second variable speed vacuum pump P2, and running the first and second variable speed vacuum pumps P1, P2 in parallel for creating the required vacuum level. The invention also relates to computer program products. | ||||||
| 37 | POSITIVE DISPLACEMENT COMPRESSOR | EP11828460.3 | 2011-09-29 | EP2623790A1 | 2013-08-07 | HASEGAWA, Hiroshi; OKAICHI, Atsuo; OGATA, Takeshi |
A rotary compressor 100 includes a compression mechanism 3, a motor 2, a suction path 14, a return path 16, a volume varying mechanism 30, an inverter 42, and a controller 44. The return path 16 serves to return a working fluid from the working chamber 25 to the suction path 14. The volume varying mechanism 30 is provided in the return path 16, permits the working fluid to return from the working chamber 25 to the suction path 14 through the return path 16 when the suction volume of the compression mechanism 3 should be set to a relatively small value, and prohibits the working fluid from returning from the working chamber 25 to the suction path 14 through the return path 16 when the suction volume should be set to a relatively large value. The volume varying mechanism 30 and the inverter 42 are controlled so as to compensate for a decrease in the suction volume with an increase in the rotational speed of the motor 2. |
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| 38 | METHOD FOR CONTROLLING A GAS SUPPLY TO A VACUUM PUMP | US15542726 | 2016-01-07 | US20170350397A1 | 2017-12-07 | Joeri COECKELBERGS |
| A method for regulating the temperature at an outlet channel of a compressor or a vacuum element, comprising providing a pressure regulating valve on a influence channel, said influence channel being in direct fluid communication with the compressor or vacuum element, said valve regulating the pressure within the compressor or vacuum element by adjusting the volume of fluid flowing between a process channel and the compressor or vacuum element relative to the difference between the pressure value within said compressor or vacuum element and a set pressure value, and comprises starting the compressor or vacuum element and starting a pre-purge cycle by connecting the inlet channel to a supply of a purge gas for a preselected time interval; connecting the influence channel to a process channel; and disconnecting the inlet channel from the process channel, for maintaining a set temperature within the vacuum element for a selected time interval. | ||||||
| 39 | METHOD AND APPARATUS IN CONNECTION WITH A SCREW COMPRESSOR | US15210679 | 2016-07-14 | US20170016447A1 | 2017-01-19 | Antti Kosonen; Jero Ahola |
| the screw compressor with a variable rotational speed of the screw compressor, the rotational speed of the screw compressor having a speed profile in which the rotational speed is changed stepwise such that between stepwise changes the rotational speed of the screw compressor is kept substantially constant for a time period, repeating the speed profile until the pressure of the pressure vessel reaches a set pressure value, determining pressure of the pressure vessel, power consumption of the screw compressor drive and mass flow rate during the pressurising when the rotational speed of the screw compressor is kept substantially constant, calculating energy efficiency of the screw compressor drive as a function of pressure of the pressure vessel and rotational speed of the screw compressor on the on the basis of the determined pressure of the pressure vessel and power consumption of the screw compressor drive. | ||||||
| 40 | SYSTEM TO PUMP FLUID AND CONTROL THEREOF | US14862608 | 2015-09-23 | US20160084274A1 | 2016-03-24 | Thomas AFSHARI |
| A fluid system includes a variable-speed and/or a variable-torque pump to pump a fluid, at least one proportional control valve assembly, an actuator that is operated by the fluid to control a load, and a controller that establishes a speed and/or torque of the pump and a position of the at least one proportional control valve assembly. The pump includes at least one fluid driver that provides fluid to the actuator, which can be, e.g., a fluid-actuated cylinder, a fluid-driven motor or another type of fluid-driven actuator that controls a load. Each fluid driver includes a prime mover and a fluid displacement assembly. The fluid displacement assembly can be driven by the prime mover such that fluid is transferred from the inlet port to the outlet port of the pump. | ||||||
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