EP1431583A2 - Vorrichtung zur Betätigung von elektrischen angetriebenen Pumpen für Flüssigkeitsabgabesystem - Google Patents

Vorrichtung zur Betätigung von elektrischen angetriebenen Pumpen für Flüssigkeitsabgabesystem Download PDF

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Publication number
EP1431583A2
EP1431583A2 EP03027457A EP03027457A EP1431583A2 EP 1431583 A2 EP1431583 A2 EP 1431583A2 EP 03027457 A EP03027457 A EP 03027457A EP 03027457 A EP03027457 A EP 03027457A EP 1431583 A2 EP1431583 A2 EP 1431583A2
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
pressure sensor
duct
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03027457A
Other languages
English (en)
French (fr)
Other versions
EP1431583A3 (de
EP1431583B1 (de
Inventor
Dario Bedin
Bruno Franchetti
Ruby Cegalin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAB Pumps SpA
Original Assignee
DAB Pumps SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DAB Pumps SpA filed Critical DAB Pumps SpA
Publication of EP1431583A2 publication Critical patent/EP1431583A2/de
Publication of EP1431583A3 publication Critical patent/EP1431583A3/de
Application granted granted Critical
Publication of EP1431583B1 publication Critical patent/EP1431583B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump

Definitions

  • the present invention relates to a device for actuating electric pumps in liquid distribution systems.
  • the device is used particularly but not exclusively in water distribution systems.
  • Pressure- and flow-controlled actuation provides for the presence of a flow sensor (flow-controlled switch), which is generally of the ON/OFF type in order to determine the flow "0" (reference flow with maximum pressure) and of a pressure sensor for measuring the "start P" or the pressure that must start the pump.
  • a flow sensor flow-controlled switch
  • the pump stops instead only due to flow, i.e., the flow-controlled switch checks whether the "0" flow state, or a flow-rate in the system that is lower than the set flow-rate limit, has been reached.
  • the aim of the present invention is to provide a device for actuating electric pumps for water distribution systems that solves the above-noted drawbacks of the prior art.
  • an object of the present invention is to provide a device for actuating electric pumps for water distribution systems that achieves the effect of reducing the pressure without causing any load loss.
  • Another object of the present invention is to provide a device for actuating electric pumps for water distribution systems that reduces the pressure only close to the maximum pressure, maintaining unchanged efficiencies and performance in the remaining operating range of the pump.
  • Another object of the present invention is to provide a device for actuating electric pumps for water distribution systems that is physically a separate module that can be applied without difficulty to a standard pump in order to convert it into a controlled-actuation pump.
  • a device for actuating electric pumps for water distribution systems characterized in that it comprises a hollow hydraulic body, to be associated with an electric pump with a single-phase electric motor, which forms internally a main duct with end connectors for connection to the hydraulic system, said main duct containing a flow-controlled switch that cooperates with a pressure sensor that is associated with said body and is coupled to an electronic pressure reduction unit that operates by reducing the rotation rate of the motor according to a voltage variation chosen between one produced in the main winding and one in the electrical power supply line.
  • a device for actuating electric pumps for water distribution systems comprises a hollow hydraulic body, generally designated by the reference numeral 10, to be associated with an electric pump 11, as will become better apparent hereinafter, that has a single-phase electric motor.
  • the hydraulic body 10 is provided with a small compensation chamber 12, formed by a membrane 13 that is arranged so that its edges lie on an opening 14 thereof with a flange 15 and by a cambered cover 16 that closes the assembly and is fixed to the flange 15 by means of screws 17.
  • the membrane 13 is interposed and fixed by means of the edges between the flange 15 and the cover 16.
  • the hydraulic body 10 forms internally a main duct 18 whose axis is perpendicular to the axis of the cover 16, with end connectors 19 and 20 for connection to the hydraulic system, which is not shown in the figures for the sake of simplicity.
  • a flow-controlled switch 21 is arranged in the main duct 18 and is constituted by a disk-like flow control element 22 with a sealing ring 23 that acts on a seat 24 of the body 10.
  • the flow control element 22 has, on one side, longitudinal peripheral tabs 25 for guiding in the duct 18 and, on the opposite side, an axial stem 26 that is surrounded by a cylindrical helical spring 27, which is compressed between the flow control element and a tubular element 28, which is arranged in the duct 18 and in which the stem 26 passes; said spring pushes said flow control element so that it forms a seal against the seat 24.
  • a per se known analog pressure sensor 29 is arranged in a seat 30 formed in a protrusion 31 of a half box-like body 32, which is fixed by means of screws 33 to the hydraulic body 10 at right angles to the chamber 12 and parallel to the longitudinal axis of the duct 18.
  • the analog pressure sensor 29 is connected to the hydraulic body 10 by means of a first secondary duct 34, which is formed in the protrusion 31 and includes a temperature sensor of the NTC type, not shown in the figures.
  • Sealing rings 35 are arranged between the protrusion 31 and the hydraulic body 10.
  • the senor 29 is connected, on the opposite side with respect to the first secondary duct 34, to the atmospheric pressure by means of a second secondary duct 36 arranged in the half box-like body 32.
  • the assembly of the pressure sensor 29 rests on an electronic board 37, which is fixed inside the half box-like body 32.
  • the electronic board 37 comprises an electronic pressure reduction unit (not shown in the figures), which reduces the pressure by reducing the rotation rate of the electric motor without causing any load loss (differently from mechanical pressure reduction units).
  • Pressure reduction occurs only in the region that is considered “critical”, i.e., close to the maximum pressure, maintaining unchanged performance and efficiencies over the remaining "actual" operating range of the pump.
  • the reduction of the rotation rate of the motor occurs solely by varying the voltage of the main winding of said motor, which is of the single-phase type.
  • a version that acts by varying the voltage of the power supply line is also provided.
  • the voltage variation is achieved by reducing the waveform of the voltage, by means of a triac 38, or by reconstructing the amplitude of the waveform of the voltage by means of a MOSFET (PWM technology), not shown.
  • a MOSFET PWM technology
  • this component In the field of electronics, this component is usually cooled by convection, i.e., by means of an aluminum fin that is fixed mechanically to it.
  • the triac 38 has dynamic cooling, which is provided by resting it on a brass insert 39 located in the hydraulic body 10 in contact with the pumped liquid.
  • a layer and preferably two or more layers 40 are interposed, necessarily according to the standards with a thickness of 1 mm each, and are made of alumina, a material that has a high insulating power while maintaining good heat conductivity.
  • the system is able to vary the rotation rate of the motor and accordingly to keep constant for example the value P max - 20% until the original performance of the curve is rejoined.
  • the device when the device according to the invention, by means of the temperature sensor integrated in the pressure sensor 29, detects an internal temperature that is lower than a set value, for example +2-3 °C, by means of a control performed by means of a microcontroller, the device launches a series of forced activations in order to keep the liquid inside the pump in motion, thus preventing its freezing and consequent crystallization.
  • a set value for example +2-3 °C
  • the forced activations are increasingly frequent and longer, according to settings determined beforehand on the microcontroller during the manufacturing process, protecting the pump to a limit temperature of for example -10°C.
  • the device according to the invention ( Figures 5 and 6) is contained in a box-like module 50, which can be applied to a standard pump 11 in order to convert it into a controlled-actuation pump by means of the simple operations of removing a terminal strip cover 41 of the standard pump 11, applying a coupling connector 42 to the pump 11, and fitting the module 50, thus obtaining an automatic and compact product by means of simple operations.
  • a device for actuating electric pumps for water distribution systems has in fact been provided which achieves the effect of reducing the pressure without causing any load loss.
  • the pressure is kept at levels that have no consequences for the tightness of the safety valves of the sanitary fixtures and do not cause intense stresses affecting various devices.
  • the device reduces the pressure only close to the maximum pressure, maintaining unchanged efficiencies and performance in the remaining range of operation of the pump.
  • the device moreover, is physically an independent module that can be applied without difficulty to a standard pump in order to convert it into a controlled-actuation pump.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Fluid Pressure (AREA)
  • Massaging Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP03027457A 2002-12-20 2003-12-01 Vorrichtung zur Betätigung von elektrischen angetriebenen Pumpen für Flüssigkeitsabgabesystem Expired - Lifetime EP1431583B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000330A ITPD20020330A1 (it) 2002-12-20 2002-12-20 Dispositivo per l'azionamento di elettropompe
ITPD20020330 2002-12-20

Publications (3)

Publication Number Publication Date
EP1431583A2 true EP1431583A2 (de) 2004-06-23
EP1431583A3 EP1431583A3 (de) 2005-07-27
EP1431583B1 EP1431583B1 (de) 2006-10-18

Family

ID=32375564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03027457A Expired - Lifetime EP1431583B1 (de) 2002-12-20 2003-12-01 Vorrichtung zur Betätigung von elektrischen angetriebenen Pumpen für Flüssigkeitsabgabesystem

Country Status (5)

Country Link
EP (1) EP1431583B1 (de)
AT (1) ATE343066T1 (de)
DE (1) DE60309123T2 (de)
ES (1) ES2274162T3 (de)
IT (1) ITPD20020330A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936205A1 (de) * 2006-12-22 2008-06-25 Grundfos Management A/S Verfahren zum Betreiben eines drehzahlregelbaren Kreiselpumpenaggregats

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007014345A1 (de) * 2007-03-26 2008-10-02 Volkswagen Ag Elektromechanisches System und Verfahren zum Betreiben eines elektromechanischen Systems
DE102014006556B3 (de) * 2014-05-06 2015-02-19 Thomas Magnete Gmbh Pumpenaggregat mit Elektromotor
CN113914836B (zh) * 2021-10-07 2024-04-16 哈尔滨艾拓普科技有限公司 一种中空力矩电机驱动的配水与配产器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0390627A1 (de) * 1989-03-31 1990-10-03 Ksb S.A. Motorpumpengruppe mit Druck- und Förderstromsensoren
US5240380A (en) * 1991-05-21 1993-08-31 Sundstrand Corporation Variable speed control for centrifugal pumps
DE4243118A1 (de) * 1992-12-21 1994-06-23 Continental Ag Verfahren zur Konstanthaltung des Druckes in einem hydraulischen System
US6234759B1 (en) * 1998-07-16 2001-05-22 Ewald Hennel Method for regulating a fluid pressure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5469802A (en) * 1977-11-16 1979-06-05 Hitachi Ltd Pump system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0390627A1 (de) * 1989-03-31 1990-10-03 Ksb S.A. Motorpumpengruppe mit Druck- und Förderstromsensoren
US5240380A (en) * 1991-05-21 1993-08-31 Sundstrand Corporation Variable speed control for centrifugal pumps
DE4243118A1 (de) * 1992-12-21 1994-06-23 Continental Ag Verfahren zur Konstanthaltung des Druckes in einem hydraulischen System
US6234759B1 (en) * 1998-07-16 2001-05-22 Ewald Hennel Method for regulating a fluid pressure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 093 (M-068), 8 August 1979 (1979-08-08) -& JP 54 069802 A (HITACHI LTD), 5 June 1979 (1979-06-05) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936205A1 (de) * 2006-12-22 2008-06-25 Grundfos Management A/S Verfahren zum Betreiben eines drehzahlregelbaren Kreiselpumpenaggregats

Also Published As

Publication number Publication date
ITPD20020330A1 (it) 2004-06-21
DE60309123D1 (de) 2006-11-30
EP1431583A3 (de) 2005-07-27
EP1431583B1 (de) 2006-10-18
DE60309123T2 (de) 2007-09-06
ATE343066T1 (de) 2006-11-15
ES2274162T3 (es) 2007-05-16

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