EP0505009A1 - Système de protection de pompe - Google Patents

Système de protection de pompe Download PDF

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Publication number
EP0505009A1
EP0505009A1 EP92200789A EP92200789A EP0505009A1 EP 0505009 A1 EP0505009 A1 EP 0505009A1 EP 92200789 A EP92200789 A EP 92200789A EP 92200789 A EP92200789 A EP 92200789A EP 0505009 A1 EP0505009 A1 EP 0505009A1
Authority
EP
European Patent Office
Prior art keywords
pump
sensor
water
orifice
back plate
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.)
Withdrawn
Application number
EP92200789A
Other languages
German (de)
English (en)
Inventor
Patrick Quirk
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.)
BRONTE WHIRLPOOLS LIMITED
Original Assignee
Bronte Whirlpools Ltd
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
Priority claimed from GB919105728A external-priority patent/GB9105728D0/en
Application filed by Bronte Whirlpools Ltd filed Critical Bronte Whirlpools Ltd
Publication of EP0505009A1 publication Critical patent/EP0505009A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H33/00—Bathing devices for special therapeutic or hygienic purposes
    • A61H33/60—Components specifically designed for the therapeutic baths of groups A61H33/00
    • 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
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H33/00—Bathing devices for special therapeutic or hygienic purposes
    • A61H33/005—Electrical circuits therefor
    • A61H2033/0054—Electrical circuits therefor with liquid level detectors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H33/00—Bathing devices for special therapeutic or hygienic purposes
    • A61H33/0087—Therapeutic baths with agitated or circulated water

Definitions

  • This invention relates to a pump protection system especially for use with hydrotherapy baths or pools.
  • Hydrotherapy baths, pools or tubs have one or more nozzles positioned below the water line in which air and water are mixed and forced into the bath producing a jet of foaming water which is said to give a therapeutic effect for persons bathing therein.
  • the water circulation is effected by means of a pump, usually electrically driven, and it is desirable that the pump should not be run when the system has been drained of water.
  • a sensor on the bath so that when the water level drops below a predetermined point the sensor is actuated and the pump disabled preventing dry running.
  • this requires special fixing and the necessity to drill the bath which is especially undesirable where the bath is cast-iron or steel.
  • the invention seeks to provide a pump protection device improved in the above respects.
  • the invention comprises locating a sensor in, or communicating with, the interior of the pump.
  • a pump protection device which comprises a pump back plate having an orifice therein within which to locate a water detecting sensor.
  • the pump back plate is preferably a modified form of the conventional pump back plate which it replaces.
  • the sensor acts directly in that it will turn off the pump when the pump is emptied irrespective of the state of the rest of the system.
  • the sensor may be of a variety of types, e.g. pressure, vacuum, electronic, or the like.
  • the sensor is also protected from extraneous light which can have an adverse effect on certain systems, and by positioning the sensor horizontally within the orifice droplets of water run off the sensing face so that droplets of water do not collect thereon to give erroneous signals.
  • the pump generally designated 10 for use with a hydrotherapy bath or pool comprises an electric motor 12 driving an axle 14 on which is mounted an impellor 16. Inlet 18 and outlet 20 ports are provided.
  • the pump 10 has a back plate 22 which, in accordance with the invention, is provided with an orifice 24 formed therein.
  • the orifice 24 contains a sensor (not shown in the drawings) which, depending on the exact type employed, may communicate directly with the impellor chamber or may operate through the portion 26 of the impellor chamber wall within the orifice 24, i.e. the "orifice" 24 may in fact be blind. In this case, for example, a capacitative sensor may be employed. In any event the orifice 24 will be sealed against egress of water from the pump interior.
  • the senor may advantageously be located towards the bottom of the pump body. While location on the back plate is convenient, and is currently preferred, the pump body could be drilled to accept the sensor at any desired position.
  • the system of the invention is considerably more reliable than the systems hitherto employed and, moreover, is easier to install and service since the pump is usually located in an accessable position.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Pain & Pain Management (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP92200789A 1991-03-19 1992-03-19 Système de protection de pompe Withdrawn EP0505009A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB919105728A GB9105728D0 (en) 1991-03-19 1991-03-19 Pump protection system
GB9105728 1991-03-19
GB9120883 1991-10-02
GB919120883A GB9120883D0 (en) 1991-03-19 1991-10-02 Pump protection system

Publications (1)

Publication Number Publication Date
EP0505009A1 true EP0505009A1 (fr) 1992-09-23

Family

ID=26298602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92200789A Withdrawn EP0505009A1 (fr) 1991-03-19 1992-03-19 Système de protection de pompe

Country Status (1)

Country Link
EP (1) EP0505009A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843100A1 (fr) * 1996-11-19 1998-05-20 Ksb S.A. Pompe à dispositif fixe de mise en marche

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396353A (en) * 1981-04-13 1983-08-02 Flint & Walling, Inc. Submersible sump pump
DE3408218A1 (de) * 1984-03-07 1985-09-12 Hugo Lahme GmbH, 5828 Ennepetal Badewanne mit umwaelzanlage, insbesondere wirbelstrom- oder sprudel-badewanne
DE8616503U1 (de) * 1986-06-20 1986-08-28 Lückoff, Burckhard, 5342 Rheinbreitbach Unterdruckschalter für Saugleitungen von Pumpen
US4645426A (en) * 1985-04-24 1987-02-24 Hartley E Dale Bilge pump
DE3640252A1 (de) * 1986-11-25 1988-06-16 Marcant Pumpen Gmbh Pumpe mit eingebauter elektro-heizung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396353A (en) * 1981-04-13 1983-08-02 Flint & Walling, Inc. Submersible sump pump
DE3408218A1 (de) * 1984-03-07 1985-09-12 Hugo Lahme GmbH, 5828 Ennepetal Badewanne mit umwaelzanlage, insbesondere wirbelstrom- oder sprudel-badewanne
US4645426A (en) * 1985-04-24 1987-02-24 Hartley E Dale Bilge pump
DE8616503U1 (de) * 1986-06-20 1986-08-28 Lückoff, Burckhard, 5342 Rheinbreitbach Unterdruckschalter für Saugleitungen von Pumpen
DE3640252A1 (de) * 1986-11-25 1988-06-16 Marcant Pumpen Gmbh Pumpe mit eingebauter elektro-heizung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843100A1 (fr) * 1996-11-19 1998-05-20 Ksb S.A. Pompe à dispositif fixe de mise en marche
FR2756020A1 (fr) * 1996-11-19 1998-05-22 Ksb Sa Pompe a dispositif fixe de mise en marche

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

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Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19930311

17Q First examination report despatched

Effective date: 19941020

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BRONTE WHIRLPOOLS LIMITED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950503