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JP6739583B2 |
To provide a space-saving pump device capable of performing a variable speed operation control by a single unit of the pump device while performing heat radiation positively.A pump device in which a pump part arranged in a pump casing 1 ...
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JP6727829B2 |
To provide a pump unit capable of suppressing pressure reduction when decreasing the number of pumps, and a control method for the pump unit.The pump unit comprises multiple pumps and a control part. Based on a discharge pressure and a t...
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JP6726031B2 |
To suppress a drainage water amount on relief piping to a minimum amount while preventing overheat of a pump in a small water amount operation.A pump unit includes: a pump; relief piping connected to the pump; a relief valve installed to...
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JP2020110026A |
To gradually decelerate and stop a pump even when an event such as a power failure or pump abnormality occurs.An inverter device comprises: a converter circuit which converts an AC voltage from a commercial power supply into a DC voltage...
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JP2020521081A |
The following four major drawbacks of conventional pump system design are: (1) sudden pump failure in a single pump design that can cause severe flood damage, and (2) fatal high voltage power outage in flood conditions. Threats, (3) powe...
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JP6721714B2 |
The invention relates to a method for stopping a submersible pump when the pump is snoring, wherein the pump is operatively connected to a control unit. The method is characterized by the steps of regulating, by means of the control unit...
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JP6723105B2 |
To provide a drainage system and a drainage method capable of shortening the time of light load operation.A drainage system is provided and comprises: a plurality of pump facilities (100a and 100b); and a control device (200). Each of th...
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JP6722065B2 |
To improve reliability of an operation at other time than operation start and operation stop, in the case of connecting a plurality of pumps in series.A drainage system is provided which includes: a plurality of pumps including an underw...
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JP2020105908A |
To provide a fluid control device which can control a flow rate properly in a system in which variations of pipe conduits and secular change are large.A fluid control device includes: a motor which drives a fluid machine; and a motor con...
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JP6715737B2 |
To provide a pump facility and a pump facility operating method, capable of effectively avoiding damage to a clutch mechanism while avoiding frequent start of a prime mover.This invention relates to a pump facility comprising a pump inst...
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JP6709774B2 |
To provide a vertical shaft pump in which a clutch can be engaged and disengaged upon precedent standby operation without requiring water level detection means such as a water level meter, and a precedent standby operation method for the...
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JP6703844B2 |
To prevent damage to a horizontal shaft pump by reliably detecting idle running of an impeller.A horizontal shaft pump 10 comprises: a pump casing 12 including a suction pipe 13, a suction elbow 16, an impeller casing 15, and a discharge...
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JP6698278B2 |
At least one drive unit among a first drive unit (9) and a second drive unit (9D) maintains an impeller (10) at a position in the center of the movement range of the impeller (10) inside a pump chamber (7) in a direction along the rotati...
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JP2020514623A |
The water absorption pump unit includes a water absorption pump (1) and a water supply pipe (2) connected to the outlet of the water absorption pump (1), and the water supply pipe (2) is provided with a water flow detection device (3). T...
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JP6695466B1 |
To provide a water supply device for preventing deterioration of pump performance while preventing high temperature water from staying in a pump. A water supply device 1 is provided on a secondary side of a pump device 10 having a pump 1...
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JP6696843B2 |
To provide a drainage system and a drainage method capable of curbing a surge.A drainage system comprises a plurality of pump facilities (100a and 100b). Each pump facility has: a motor (1a) with an output shaft (11a); a pump (3a) with a...
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JP6694250B2 |
To suppress a cost, and to suitably operate a pump even if the length of wiring supplying voltage from an inverter to an electric motor is changed.A pump system 100 is equipped with an electric motor 3 which has a rotary shaft and rotate...
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JP2020070752A |
To provide an operation control method of a submerged pump which can adjust a proper drain amount according to a water level at a suction side by using a movable vane submerged pump which is installed at a wall or a water gate door forme...
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JP2020069615A |
To provide a water pump test jig and a water pump testing method capable of performing a starting test of a water pump well.A water pump test jig for performing a starting test of a water pump device that has a water pump body, and a flo...
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JP6688123B2 |
To provide drainage pump equipment and a drainage method, capable of performing a stable drainage without using any complex control.This invention relates to a drainage pump equipment [100] installed at a vertical shaft [90] provided wit...
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JP6683462B2 |
The present invention relates to a pump device provided with an underwater pump unit. The pump device is provided with: an underwater pump unit (1) provided with a pump (2) and an electric motor (3); a pressure sensor (13) which measures...
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JP6686893B2 |
In order to keep the deterioration of water distribution pipes from progressing, a tap water management system is provided with: a water pressure detection unit for detecting the water pressure in at least one location in a water distrib...
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JP2020510154A |
To control a rotation speed of a centrifugal pump operating in an open hydraulic circuit. A pump-controlled controller calculates a desired rotation speed of a pump drive in consideration of desired and actual discharge levels, as well a...
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JP2020510153A |
The present invention relates to a method of operating a variable speed circulation pump, particularly a heated circulation pump, in which the pump controller detects at least one physical pump operating variable by a sensor and indirect...
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JP6674582B1 |
To propose a method for easily confirming a state of a water tank for storing a transfer liquid of a pump device or an electric wiring. This is a display method for displaying the state of a water tank, in which the water tank stores the...
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JP6674066B1 |
To propose a method capable of easily confirming a connection between a detection target of an output signal and a pump device and / or a connection between an external output terminal of the pump device and a connection destination. A d...
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JP6672400B2 |
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JP6671231B2 |
To provide a water feed pump operation control method and a water feed pump operation control device capable of restricting a water level variation before and after stopping operation of the water feed pump.Upon reaching of an upstream s...
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JP6672415B1 |
To provide a water supply device capable of reducing power consumption. A water supply device 1 is arranged in each layer of a plurality of pump devices 11 having a pump 11b and a motor 11a for driving the pump 11b, an inverter 61 for dr...
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JP6669388B2 |
To provide a drainage pump and an operational method therefor for restricting consumption of pump power under air lock condition and attaining high reliability in operation and an easiness in its maintenance.This invention comprises: an ...
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JP6665009B2 |
To reduce operation cost by restricting the pump power consumption.A pump system comprises: at least one motor; at least one pump driven by the motor for sucking water from a suction sump; a water supply flow meter for measuring a water ...
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JP6665073B2 |
To avoid suspension of water supply as much as possible when an abnormal value is detected during operation, by not stopping as a failure but preferentially continuing the operation with lowered performance.A water supply unit comprises:...
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JP6665232B2 |
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JP6665082B2 |
To curb a pressure loss to a maximum extent when a paddle type flow sensor is used.A water supply unit comprises: a self-priming chamber which is installed at a discharge port side of a vortex pump driven by a drive motor; a gas-liquid s...
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JP2020033874A |
To enable water having entered an underground space part for housing power and communication cables under the ground to be drained automatically with a simple system.A drainage system is arranged so as to float on the water accumulated i...
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JP2020033871A |
To provide a pump device and a method for controlling a pump device, which can discriminate not only the presence or absence of an abnormality but also the type of the abnormality.A pump device has a pump section 20 having a motor 21, an...
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JP6657010B2 |
To provide an electric pump capable of suppressing power consumption, and stably starting an operation of the electric pump at a prescribed water level while suppressing complicated adjustment work for detecting a water level without ele...
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JP6650491B2 |
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JP6647893B2 |
To confirm the soundness of a flap valve in a simple configuration without raising a flap valve on a water level in a pump machine field using a horizontal shaft pump.A pump machine field comprises: a suction sump; a discharge sump; and ...
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JP6647881B2 |
To provide a pump operation pattern control method for controlling a pump unit so as to operate in an energy saving manner.A pump operation pattern control method of the present invention calculates a pump efficiency of an operation pump...
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JP6647540B2 |
A control arrangement for a coolant pump of an internal combustion engine includes a control slide which controls a throughflow cross-section of an annular gap arranged between an outlet of a coolant pump impeller and a surrounding deliv...
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JP2020023890A |
To provide a movable blade pump device enabling optimal operation for a setting flow without adjusting a flow rate with a discharge valve regardless of an installation condition of a pump.A movable blade pump device having a plurality of...
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JP6644618B2 |
To suppress frequency of error processing for a detection error of a pressure sensor, in a case where the inside of a water storage tank temporarily becomes negative pressure.A bubble type liquid gauge 30 has a pressure sensor 34 configu...
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JP6644418B2 |
To provide an electric pump system capable of alternately using a plurality of electric pumps efficiently to discharge water.An electric pump system 100 includes: a plurality of electric pumps 3a, 3b; a water level detection unit 4 confi...
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JP6643117B2 |
To provide a water supply device capable of surely detecting failure of a flow rate detector without outputting an alarm for a temporary abnormality of the flow rate detector.A water supply device includes a pump 2, an electric motor 3 f...
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JP6643118B2 |
To provide a water supply device capable of surely detecting failure of a flow rate detector without outputting an alarm for a temporary abnormality of the flow rate detector.A water supply device includes a pump 2, an electric motor 3 f...
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JP6637784B2 |
To provide a suction cover structure of a horizontal shaft pump capable of restricting occurrence of frequent starting and stopping operations of a pump or occurrence of frequent changing-over between pumping-up operation and operation i...
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JP6637265B2 |
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JP6637692B2 |
To enable performing optimum pump rotation speed control according to water amount without using mechanical flow rate detection means in a pump device.A pump device includes: a pump; an electric motor for driving the pump; an inverter wh...
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JP2020012378A |
To solve the problem that it is hard to handle a tool such as a spanner in a narrow construction space although the tool is required for rotating an adjusting screw which is provided in a pressure control device, and the problem that, wh...
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