EP1426621B1 - Electric pump operation control device - Google Patents

Electric pump operation control device Download PDF

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Publication number
EP1426621B1
EP1426621B1 EP03380274A EP03380274A EP1426621B1 EP 1426621 B1 EP1426621 B1 EP 1426621B1 EP 03380274 A EP03380274 A EP 03380274A EP 03380274 A EP03380274 A EP 03380274A EP 1426621 B1 EP1426621 B1 EP 1426621B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
electric
control device
pump
circuit
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.)
Expired - Lifetime
Application number
EP03380274A
Other languages
German (de)
French (fr)
Other versions
EP1426621A1 (en
Inventor
Josep Pages Pages
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.)
Bogemar SL
Original Assignee
Bogemar SL
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 Bogemar SL filed Critical Bogemar SL
Publication of EP1426621A1 publication Critical patent/EP1426621A1/en
Application granted granted Critical
Publication of EP1426621B1 publication Critical patent/EP1426621B1/en
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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • F04D15/0254—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being speed or load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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

Definitions

  • the invention has the object of an electric pump operation control device, of those that are comprised of a multi-stage pump and by an electric motor coupled together coaxially, and which are widely used to lift water.
  • the electric pump operation control device of the invention is applicable to electric pumps comprised of a multi-stage pump and of an electric motor coaxially coupled, the electric motor being equipped with a junction box adapted to connect a single-phase or three-phase AC line to power the electric motor.
  • the control device comprises an electric motor operating conditions control circuit to prevent idling, and an electric pump operation programming circuit, programmable by the user, arranged in the electric motor junction box.
  • control circuit comprises an electronic controller which permanently determines the power factor of the charged loaded electric motor, all of this adapted so that when said power factor reaches a certain predetermined minimum value indicative of the idling of the electric motor, the circuit disconnects the electric motor from the power supply.
  • Another characteristic of the invention consists of electric motor disconnecting when the power factor reaches a value less than or equal to 0.70.
  • the programming circuit comprises a programming keyboard and a viewing screen.
  • an electric pump 1 has been represented, essentially comprised of a suction-discharge multi-stage pump 2 and of an electric motor 3 coaxially coupled together.
  • the multi-stage pump 2 is equipped with a suction inlet 4 and a discharge outlet 5 to which a water pipe, not represented, can be coupled to distribute it to the consumption points.
  • An electric motor 3 operating conditions control circuit 8, and an electric pump 1 operation programming circuit 9 are arranged inside the junction box 6.
  • the control circuit 8 comprises an electronic controller which, from electric power data of the electric motor 3, such as the terminal voltage and sink current value, permanently determines the power factor of the loaded electric motor 3.
  • the circuit further comprises means to disconnect the electric motor 3 from the supply network when the power factor determined by the electronic controller reaches a value equal to or less than 0.7, values which are indicative that the electric motor 3 is idling, i.e. the water is not pumped by the multi-stage pump 2.
  • the programming circuit 9 permits the user to program the electric pump 1 operating conditions adapting, in this way, the electric pump 1 operating periods to the consumption requirements of each specific case, this being particularly advantageous in those installations where automatic operation is required, such as to water garden areas on certain days, at certain times and for a determined period of time.
  • the programming circuit 9 comprises a programming keyboard and a viewing screen, not represented.
  • the characteristics described in the example of the embodiment of the electric pump operation control device of the invention provide a solution to the drawbacks derived from the high costs of the installation of control devices external to electric pumps, specifically as regards the control of idling and the programming of the automatic operation of the electric pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

The control device according to the invention is characterized in that it comprises an electric motor (3) operating conditions control circuit (8), to prevent idling, and an electric pump (1) operation programming circuit (9) programmable by the user, arranged in the electric motor (3) junction box (6). <??>The electric pump operation control device of the invention is applicable to electric pumps (1) comprised of a multi-stage pump (2) and of an electric motor (3) coupled together coaxially. <IMAGE>

Description

    Technical field of the invention
  • The invention has the object of an electric pump operation control device, of those that are comprised of a multi-stage pump and by an electric motor coupled together coaxially, and which are widely used to lift water.
    • Background of the invention
  • Multiple embodiments are known of electric pumps comprised of a multi-stage pump and by an electric motor coupled together coaxially. To control the operation of electric pumps, devices which control operation variables thereof can be installed; amongst said operation variables we should highlight the control of the electric motor operating conditions, specifically the loaded operating conditions which correspond to the pumping of water by the multi-stage pump and the idle operating conditions which correspond to the non-pumping of water by the multi-stage pump, and the control of the electric pump operating periods, to adapt them to the conditions preset by the requirements of use such as those of automatic watering of garden areas similar devices are also known from US 4 420 787 A and US 5 015 151 A.
  • Up to the present date, said operation control devices have to be externally arranged in relation to the electric pump, which, in any case, implies high assembly costs, which make the total cost of the installations more expensive.
    • Explanation of the invention
  • The electric pump operation control device of the invention is applicable to electric pumps comprised of a multi-stage pump and of an electric motor coaxially coupled, the electric motor being equipped with a junction box adapted to connect a single-phase or three-phase AC line to power the electric motor.
  • The control device according to the invention comprises an electric motor operating conditions control circuit to prevent idling, and an electric pump operation programming circuit, programmable by the user, arranged in the electric motor junction box.
  • It is also a characteristic of the invention that the control circuit comprises an electronic controller which permanently determines the power factor of the charged loaded electric motor, all of this adapted so that when said power factor reaches a certain predetermined minimum value indicative of the idling of the electric motor, the circuit disconnects the electric motor from the power supply.
  • Another characteristic of the invention consists of electric motor disconnecting when the power factor reaches a value less than or equal to 0.70.
  • According to another characteristic of the invention, the programming circuit comprises a programming keyboard and a viewing screen.
    • Brief description of the drawings
  • In the only figure of the attached drawings, an electric pump equipped with the electric pump operation control device according to the invention is diagrammatically illustrated by way of non-limiting example.
    • Detailed description of the drawings
  • In the figure of the sheet of drawings, an electric pump 1 has been represented, essentially comprised of a suction-discharge multi-stage pump 2 and of an electric motor 3 coaxially coupled together. The multi-stage pump 2 is equipped with a suction inlet 4 and a discharge outlet 5 to which a water pipe, not represented, can be coupled to distribute it to the consumption points. The electric motor 3, which can be an AC short-circuit rotor powered by a single-phase line or a three-phase line, is equipped with a junction box 6 of ample size, equipped with a watertight inlet 7 to permit the passage of the electric conduction to power the electric motor 3.
  • An electric motor 3 operating conditions control circuit 8, and an electric pump 1 operation programming circuit 9 are arranged inside the junction box 6.
  • The control circuit 8 comprises an electronic controller which, from electric power data of the electric motor 3, such as the terminal voltage and sink current value, permanently determines the power factor of the loaded electric motor 3. The circuit further comprises means to disconnect the electric motor 3 from the supply network when the power factor determined by the electronic controller reaches a value equal to or less than 0.7, values which are indicative that the electric motor 3 is idling, i.e. the water is not pumped by the multi-stage pump 2.
  • The programming circuit 9 permits the user to program the electric pump 1 operating conditions adapting, in this way, the electric pump 1 operating periods to the consumption requirements of each specific case, this being particularly advantageous in those installations where automatic operation is required, such as to water garden areas on certain days, at certain times and for a determined period of time. For the purpose of making it easily programmable by the user, the programming circuit 9 comprises a programming keyboard and a viewing screen, not represented.
  • The characteristics described in the example of the embodiment of the electric pump operation control device of the invention, provide a solution to the drawbacks derived from the high costs of the installation of control devices external to electric pumps, specifically as regards the control of idling and the programming of the automatic operation of the electric pump. The fact that both the electric motor 3 operating conditions control circuit 8 and the electric pump 1 operation programming circuit 9 are located in the electric motor 3 junction box 6, eliminates the requirement for any type of installations external to the electric pump 1 for devices with said purposes, achieving, in this way, a large reduction in costs of the installations.

Claims (4)

  1. Electric pump operation control device, which is applicable to electric pumps (1) comprised of a multi-stage pump (2) and an electric motor (3) coupled together coaxially, the electric motor (3) being equipped with a junction box (6) adapted for the connection of an AC line to power the electric motor (3), which comprises an electric motor (3) operating conditions control circuit (8), to prevent idling, and an electric pump (1) operation programming circuit (9), programmable by the user, arranged in the electric motor (3) junction box (6).
  2. Control device according to claim 1, characterized in that the control circuit (8) comprises an electronic controller which permanently determines the power factor of the loaded electric motor (3), all of this adapted so that when said power factor reaches a certain predetermined minimum value indicative of idling of the electric motor (3), the circuit disconnects the electric motor (3) from the electric power line.
  3. Control device according to claim 2, characterized in that the electric motor (3) disconnects when the power factor reaches a value less than or equal to 0.70.
  4. Control device according to claim 1, characterized in that the programming circuit (9) comprises a programming keyboard and a viewing screen.
EP03380274A 2002-12-05 2003-11-28 Electric pump operation control device Expired - Lifetime EP1426621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200202932U ES1054218Y (en) 2002-12-05 2002-12-05 ELECTRICAL PUMP OPERATION CONTROL DEVICE.
ES200202932U 2002-12-05

Publications (2)

Publication Number Publication Date
EP1426621A1 EP1426621A1 (en) 2004-06-09
EP1426621B1 true EP1426621B1 (en) 2006-01-04

Family

ID=8502677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03380274A Expired - Lifetime EP1426621B1 (en) 2002-12-05 2003-11-28 Electric pump operation control device

Country Status (4)

Country Link
EP (1) EP1426621B1 (en)
AT (1) ATE315176T1 (en)
DE (1) DE60303110D1 (en)
ES (2) ES1054218Y (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0703129D0 (en) * 2007-02-17 2007-03-28 Dlp Ltd An electrical shower-waste pump and control unit
EP2573403B1 (en) 2011-09-20 2017-12-06 Grundfos Holding A/S Pump
CN111503013B (en) * 2020-05-09 2020-10-30 蜂巢动力系统(江苏)有限公司 Dry-running protection method for electronic water pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57195886A (en) * 1981-05-27 1982-12-01 Hitachi Ltd Pump unit
US4420787A (en) * 1981-12-03 1983-12-13 Spring Valley Associates Inc. Water pump protector
US5015151A (en) * 1989-08-21 1991-05-14 Shell Oil Company Motor controller for electrical submersible pumps
PL176270B1 (en) * 1995-07-14 1999-05-31 Kiełtyka Maciej System for automatically protecting motors of circulating and recirculating pumps

Also Published As

Publication number Publication date
ES1054218Y (en) 2003-10-16
ES2252643T3 (en) 2006-05-16
ATE315176T1 (en) 2006-02-15
ES1054218U (en) 2003-07-01
DE60303110D1 (en) 2006-03-30
EP1426621A1 (en) 2004-06-09

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