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Patent Searching and Data


Matches 501 - 550 out of 3,479

Document Document Title
JP2013040563
To provide a pump drive control device configured to precisely detect the presence of water using a circulation pump of DC drive.This pump drive control device comprises: a circulation pump 14 of DC drive for circulating hot water; and a...  
JP2013040593
To provide a pump system for a cold and hot water circulating and supplying system of using a variable speed pump suitable for automatically generating a parameter and an operation expression required for pump operation control and end p...  
JP2013040596
To provide a pump system in which a plurality of pumps can be driven impartially with a simple constitution.An air vent valve 26 is connected to a suitable portion of a lifting pipe 15 of each of a plurality of pump units 11 and an advan...  
JP2013024073
To provide a water treatment system in which it is not necessary to install a measurement tank or an electromagnetic flowmeter, entire system costs can be reduced, water can be sent from a flow rate adjusting tank to a treatment tank wit...  
JP2013024151
To provide a submersible pump control unit, which is capable of reducing costs required for update facilities by effectively utilizing existing control panel facilities, even if installed outdoors under large effects of temperature/humid...  
JP2013027184
To provide a space-saving pump unit which can perform variable speed operation control by the single pump unit while securely releasing heat.In a pump unit, a pump portion installed in a pump casing and having an impeller and a rotating ...  
JP2013019420
To calculate shaft power and consumption power required when a pump is operated at an optional operating point based on a pump characteristic value indicating the optional operating point.A reference flow rate calculation part 16A calcul...  
JP2013019421
To calculate a characteristic value of a pump with high accuracy without measuring operation characteristic data of the pump in advance.A device for calculating a pump characteristic value includes: a reference operating point identifyin...  
JP2013019422
To calculate a characteristic value of a pump with high accuracy without measuring operation characteristic data of the pump in advance.A device for calculating a pump characteristic value includes: a reference operating point identifyin...  
JP2013011241
To provide a multistage pump with improved tansporting performance.The multistage pump includes a rotating shaft 1, a plurality of impellers 2 fixed at the rotating shaft 1, and a pump casing 3 that accommodates the plurality of impeller...  
JP2013011254
To solve the problem that water inside a pump powered by an internal combustion engine and inside a pipe on the pump side remain in situ until the pump powered by the internal combustion engine is operated and that there is the risk of r...  
JP2012246865
To provide a pump facility of high maintainability, by managing and maintaining the pump facility from a present operation state.This pump facility 10 includes: a main pump 301 for pumping liquid; an auxiliary machine facility 303 includ...  
JP2012246826
To provide water supply equipment that enables easy detection of failure in a backflow prevention valve, includes a plurality of sets of water supply devices each comprising a backflow prevention valve, a pump, etc., and is configured by...  
JP2012241614
To provide a water supply device using a variable speed pump suitable for a terminal pressure constant control system without the need for concerning about an overload or overcurrent, and not requiring any special preliminary considerati...  
JP2012241567
To issue a warning of a pump failure due to cavitation or leakage of a pump device which sucks a fluid from a suction port and discharges the fluid from a discharge port without storing the fluid in a pressure tank.The pump device includ...  
JP2012229699
To provide a method for starting a water supply system that can eliminate a lack of water supply pressure caused in such a case as when flush valves for flushing toilets in facilities such as a school are used simultaneously.The water su...  
JP2012225255
To provide a water supply system capable of continuing the water supply without suspending the operations of pumps even if transmission faults take place between a plurality of inverter control sections and a control section that issue s...  
JP2012219764
To improve the reliability of a water supply device by stopping a pump even when the pressure on the discharge side of the pump is not increased due to clogging of a constant pressure valve with a foreign matter or the like.The water sup...  
JP2012219721
To provide a fluid flowing device inhibiting the deterioration of pump efficiency and inhibiting the occurrence of a pump lock state by magnetic foreign matters.To solve the problem, in the fluid flowing device including a pump 2 for cau...  
JP2012216133
To provide a liquid level control device and a liquid level control method capable of performing liquid level control with higher accuracy and reducing a useless adjustment.A liquid level control device 1 comprises: a container 20 where ...  
JP2012215176
To eliminate the work for causing start timing of one submersible pump 1A to be different from that of another submersible pump 1B and to reliably perform automatic alternate operations of the two submersible pumps 1, when installing the...  
JP2012215101
To improve pump efficiency by reducing unnecessary energy with a simple structure and a simple control.The pump includes a rotary drive shaft 5 provided inside a pump casing 3 having a fluid suction opening on one end side and a fluid ej...  
JP2012207546
To provide a pump power consumption characteristic model in consideration of non-linearity and multi-valued feature of power consumption characteristics with respect to a flow rate, and a change of the power consumption characteristic ac...  
JP2012197795
To provide a horizontal shaft pump (a double-suction horizontal shaft pump or self-balance multistage horizontal shaft pump) which has vane wheels disposed symmetrically, makes a radial load borne by a hydrostatic bearing, and effectivel...  
JP2012193585
To provide a water distribution pressure control apparatus which is capable of highly accurately controlling terminal pressure of a water distribution pipe network.A water distribution pressure control system includes a duct resistance m...  
JP2012188943
To provide a water supply device that can detect an abnormal state of a CPU.The water supply device includes: pumps 3-1, 3-2 for supplying water; a pressure detector 8 for detecting water pressure at a discharge side of the pump to outpu...  
JP2012177304
To provide a configuration, by which semiconductor components inside a controller are cooled by air and the controller is manufactured at low cost.The controller 3 is arranged in the rear of a cylindrical fan cover 29 which covers a moto...  
JP2012172565
To improve pump efficiency by lengthening effective lengths of blades of an impeller, and attract a bearing by magnetic attractive force to prevent reflux from suction to discharge.In a pump 110, a liquid sucking direction X and a liquid...  
JP2012154186
To provide a bypass energy recovery device of a fluid machine that can improve the total efficiency of the machine by effectively utilizing a pressure-loss amount of fluid energy in a pressure-loss mechanism.In a multistage centrifugal p...  
JP2012154286
To provide a water supply device capable of easily setting a parameter required for performing end pressure constant control.A target pressure setting means of the water supply device operates an electric motor at a variable speed by a v...  
JP2012149529
To provide a drainage pump for an air conditioner, achieving a smaller occupied space in the air conditioner by eliminating the need to externally mount a sensor, etc. for detecting a drainage water level.A motor part 10 is supported by ...  
JP2012149649
To improve stall-resistant characteristics of a pump to be used, to provide the pump with characteristics more resistant to stall, and to combine constant shaft power with rotation speed to enable stable operation over a wider operation ...  
JP2012144976
To provide an abnormality detection method of a pressure tank which can accurately detect the abnormality of the pressure tank such as decrease in the charged pressure, and a water supply device with an abnormality detection function for...  
JP2012127360
To provide a pump installation having improved reliability, safety and economic efficiency by shortening the time for stating a horizontal shaft pump to allow quick start of draining operation.The pump installation 1 including the horizo...  
JP2012117371
To provide a pump device that can detect the rotational direction of a pump without depending on visual confirmation, and can rotate the pump in a positive direction.The pump device comprises the pump P, a motor M, an inverter 12, and a ...  
JP2012112363
To provide a water supply device capable of stabilizing a water supply pressure when renewing a target pressure of terminal pressure constant control (or discharge pressure constant control).In the water supply device including a pump co...  
JP2012101136
To provide a fire pump system which can steadily and effectively work under unfavorable conditions when a disaster occurs.The fire pump system includes a motor-driven pump 10 for feeding water, a plurality of discharging means 50 mounted...  
JP2012087688
To provide a pump control device, which is capable of reducing a variation rate of an actual flow rate with respect to a target flow rate of a pump device during a low flow rate, while a control of the pump device is simplified.A pump co...  
JP2012082688
To achieve a high pumping efficiency in a wide flow rate range.A drive control device of an electric pump includes a pump for supplying a dynamic pressure to a fluid by rotating an impeller, and a motor serving as a rotation drive source...  
JP2012077684
To provide a highly reliable pump apparatus having a simple apparatus constitution and capable of reliably executing the start and the continuous operation of a pump without stopping a prime mover to a large fluctuation of the water suct...  
JP2012077701
To automatically measure pump characteristics without stopping operation of a water treatment plant facility.A control device 10 monitors whether a pumping amount q and an average rotation speed n of suction pumps P1-PN are within prescr...  
JP2012072697
To provide a centrifugal pump unit capable of generating sufficient negative pressure in a case.In this centrifugal pump unit 10, a delivery nozzle 45 is arranged in an upper part 38 of the case 33, an impeller 23 is rotatably arranged i...  
JP2012052440
To achieve prevention or mitigation of a surging phenomenon of a suction water tank and reduction of a load of power supply equipment, while equalizing a discharge operation time of each pump, without increasing the scale of a pump stati...  
JP2012026376
To provide an overheating protection system of a pump that has a thin pipe diameter and a short bypass pipe, and that prevents a temperature of liquid from increasing at low cost and effectively.The overheating protection system 20 of th...  
JP2012002231
To provide a system and method of determining a centrifugal turbomachinery remaining life.A centrifugal turbomachine 10 includes an impeller 16 and a speed sensor 22 arranged to detect a speed associated with an impeller speed. The speed...  
JP2012002197
To provide an automatic operation device of a non-automatic operation type electric pump capable of immediately responding to a liquid level, by an automatic operation device of a non-automatic operation type electric pump which eliminat...  
JP2011256769
To provide horizontal shaft pump equipment capable of suppressing starting current of an electric motor serving as a driving machine, completing a water filling process in a short time, and allowing a draining operation at an early stage...  
JP2011256810
To provide a vertical shaft pump having a structure simple and easy in an installation work and capable of effectively cleaning a suction tank in a controlled operation.Vertical pipes 21A, 21B branched from T-shaped pipes 19A, 19B connec...  
JP2011247163
To provide a pump device capable of highly reliability forming a self-siphon and performing siphon destruction at a low equipment cost using a simple piping system in which an electrically-operated valve requiring control is not required...  
JP2011214534
To enhance discharge performance in low-speed rotation of a water pump and to reduce the discharge performance in high-speed rotation, and to prevent a reduction in the discharge performance by other members.An impeller in the water pump...  

Matches 501 - 550 out of 3,479