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WO2006136819A2 - Appareil combine compose d'une pompe et d'un element chauffant - Google Patents

Appareil combine compose d'une pompe et d'un element chauffant Download PDF

Info

Publication number
WO2006136819A2
WO2006136819A2 PCT/GB2006/002272 GB2006002272W WO2006136819A2 WO 2006136819 A2 WO2006136819 A2 WO 2006136819A2 GB 2006002272 W GB2006002272 W GB 2006002272W WO 2006136819 A2 WO2006136819 A2 WO 2006136819A2
Authority
WO
WIPO (PCT)
Prior art keywords
heater
opening
electric heater
pump
pump housing
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.)
Ceased
Application number
PCT/GB2006/002272
Other languages
English (en)
Other versions
WO2006136819A3 (fr
Inventor
Simon Whitely
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.)
Otter Controls Ltd
Original Assignee
Otter Controls 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
Application filed by Otter Controls Ltd filed Critical Otter Controls Ltd
Publication of WO2006136819A2 publication Critical patent/WO2006136819A2/fr
Publication of WO2006136819A3 publication Critical patent/WO2006136819A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4285—Water-heater arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine

Definitions

  • the invention relates to combined heater pump apparatus for providing a flow of heated pressurised fluid, particularly but not exclusively, for providing such a flow in a dishwashing machine.
  • EP-A-I 139 852 discloses a combined heater and pump.
  • the pump has an electric heating device fitted to the exterior of the pump housing. This can provide problems in matching the heating element(s) to the shape of the pump housing and ensuring that the heat produced by the heating element is efficiently transferred to the fluid passing through the pump.
  • the invention provides a combined heater pump apparatus comprising a pump housing and an electric heater, wherein said pump housing defines an opening and said electric heater is disposed such that it at least partially closes said opening and, in use, is in direct contact with fluid that is pumped through the pump housing.
  • the invention also includes a combined heater pump apparatus comprising: a pump housing defining a chamber having an inlet and an outlet and defining an opening; a pumping device housed in said chamber for pumping fluid between said inlet and outlet; and an electric flat plate thick film heater disposed in said opening such that said heater at least partially closes said opening and, in use, contacts the fluid that is in said chamber.
  • Figure 1 is a cutaway perspective view of a combined heater pump apparatus according to the invention with the pump impeller removed;
  • Figure 2 is a view of the combined heater pump apparatus of Figure 1 rotated through approximately 90° and showing the pump impeller; and -
  • FIG 3 is a schematic representation of a dishwashing machine fitted with the combined heater pump apparatus of Figures 1 and 2.
  • a combined heater pump apparatus 10 includes a pump housing comprising a cylindrical wall 12, a planar wall 14 at one end of the cylindrical wall that closes a cylindrical chamber 16 defined by the pump housing and a lip 18 at the other end of the cylindrical wall.
  • An aperture 20 is provided in the planar wall 14 to provide access to the chamber 16.
  • a relatively short pipe 22 projects from the planar wall 14 and in combination with the aperture 20 defines a pump inlet.
  • the pump outlet is defined by an aperture 24 defined in the cylindrical wall 12 and a relatively short pipe 26 projecting from the cylindrical wall.
  • the respective axes of the pump inlet and pump outlet are in substantially mutually perpendicular planes.
  • the lip 18 defines an opening in the pump housing, which is closed by an electric heater 28 that is fitted in the opening.
  • the electric heater 28 is a flat plate thick film heater and, as can be seen from the drawings, it effectively forms a wall of the pump housing. Thick film heater elements per se axe known and are, for example, used incorporated in electric kettles. Typically, a flat plate thick film heater element will comprise a resistance heating track laid on an insulating substrate provided on a thin metal plate made of, for example, stainless steel.
  • annular seal element 30 is seated in an annular recess 32 defined by the lip 18.
  • the seal element 30 is provided with a circumferential groove in which the periphery of the electric heater 28 is sealingly engaged.
  • the seal element 30 may be bonded in the annular recess 32 or fixed by a suitable mechanical fitting(s) so as to provide a seal between the annular recess and the seal element.
  • the annular cover plate might be fitted to the outer face 36 of the lip 18 and secured to the pump housing by fasteners, such as screws, a suitable snap- fastening arrangement comprising cooperable formations provided on the pump-housing and the cover plate, or a separate clip arrangement.
  • suitable sealing devices and materials which include, for example, "O" rings made of neoprene or silicone rubber.
  • the impeller 40 is disposed in the chamber 16.
  • the impeller 40 has a drive shaft 42 that extends through an aperture provided in the electric heater 28. Suitable seals 44 are provided about the aperture and the drive shaft 42. In use, the impeller is driven by an electric motor (not shown), which is connected with the drive shaft 42.
  • the seals and bearing supports for the impeller may be the same as those of conventional pumps used in such machines, or of any other suitable type, and have been omitted from the drawings, so that the invention is more clearly illustrated.
  • the impeller 40 comprises an annular planar member 46 and a planar member 48 disposed parallel to the annular planar member 46.
  • the planar member 48 is in the form of a disc and is fitted to the drive shaft 42.
  • a plurality of impeller blades 50 is disposed between and interconnects the planar members 46, 48.
  • the face of the planar member 48 that faces the electric heater 28 is provided with a plurality of agitators 52.
  • the agitators comprise a plurality of radially extending projections formed integrally with the planar member 48 and evenly spaced around the periphery thereof.
  • An annular wall 54 extends from the inner face of the planar wall 14 such that its free end is located adjacent the outer face of the annular planar member 46.
  • the wall 54 separates the chamber 16 into an, inner, low pressure region in which fluid passes from the pump inlet into the interior of the impeller 40 and an, outer, high pressure region, which surrounds the low pressure region and receives relatively higher pressure fluid from the impeller 40.
  • the inlet pipe 22 is connected to a reservoir, or sump, 102.
  • the sump 102 is connected with a source 105 of mains pressure water by suitable ⁇ pip ⁇ g 106 and valving 107.
  • a solenoid valve ⁇ lO7 is used to control the flow of water from the mains pressure source 105 to the sump 102.
  • suitable piping 108 is used to connect the outlet pipe 26 with spray heads 110, or the like, disposed in the washing compartment 112 of the dishwashing machine.
  • the solenoid valve 107 When the solenoid valve 107 is opened, mains pressure water passes into sump 102.
  • the water level in the sump 102 is controlled by level switches connected with a controller, which provides control signals for the solenoid 106.
  • the level switches and controller are not shown in the drawing for the sake of clarity and may be of any conventionally-used type.
  • the level switches may, for example, be float switches.
  • the water passes to an inner, low pressure, region of the chamber 16 via the inlet pipe 22 and aperture 20.
  • the impeller 40 raises the pressure of the water which is expelled into an, outer, high pressure region of the chamber 16.
  • the pressurised water is flash heated by the electric heater 28 before passing out of the chamber 16 via the aperture 24 and outlet pipe 26. It will be appreciated that as the impeller 40 rotates, the agitators 52 are rotated and prevent the formation of a pool of stagnant water on the electric heater 28 so that the water is more evenly heated.
  • the combined heater pump apparatus 10 has many advantageous features. Since the electric heater 28 forms a wall of the pump housing and is in direct contact with the fluid to be heated, a good coefficient of heat transfer is obtained. Heat is not lost to heating the pump housing, as in the prior art.
  • the pump . housing can be manufactured from materials that do not have good heat transfer properties and it is not necessary to use heat transfer pastes and the like to ensure heat is conducted from the heater element into the wall of the pump housing.
  • a pump housing in an embodiment of the invention may be a plastics moulding. This, in itself, provides advantages in terms of weight, ease of manufacture in that scale will not generally form on a plastics material. Where the pump housing is a plastics moulding, the annular seal 32 may be incorporated in the moulding during the moulding process.
  • a further advantage of the combined heater pump apparatus 10 is that the electric heater does not have to be fo ⁇ ned to take account of the shape of the pump housing.
  • a simple planar element can be used to fill the opening in the pump housing.
  • a further advantage is that the combined heater pump apparatus 10 is relatively compact as compared with apparatus of similar capacity comprising a separate pump and electric heater.
  • the electric heater is sized to fit an opening sufficiently large to permit easy withdrawal of the impeller and is removably fitted into the opening. This facilitates servicing of the combined heater pump apparatus.
  • the size of the seal element may be suitably adjusted and/or a collar, or other suitably sized part, could be fitted to the electric heater to make the fit.
  • the electric heater is a flat plate thick film heater
  • the surface of the heater that contacts the liquid can be coated with a suitable material, such as fluoropolymers (for example materials based on PTFE), so as to prevent scaling.
  • the combined heater pump apparatus may use electrical heaters other than a thick film heater.
  • the opening in the pump housing may be closed by a relatively thin plate member having an electric heater element secured to the outer side thereof by soldering or clenching.
  • the heater element may, for example, be a metal sheathed, mineral insulated, resistance wire heater clenched or soldered to a stainless steel plate.
  • the combined heater pump apparatus 10 comprises a vaned impeller 40.
  • a vaned impeller 40 may be used.
  • other forms of pump device may be used.
  • the combined heater pump apparatus has been described in use in a dishwashing machine. It is to be understood that the invention is not limited to such use and, in principle, can be used in any apparatus in which a pumped fluid is to be heated.
  • the apparatus might be incorporated into a power shower, clothes washing machine or high pressure hot washing machine.
  • a further advantage of fitting an electric heater into an opening in a pump housing is that the electric heater can be configured such that a simple proprietary overheat protection device can be fitted to it to reduce or interrupt the electric current supply to the heater in the event is temperature exceeds a predetermined level. Ch'erheating might be due to a failure in the water supply or blockages forming upstream or downstream of the apparatus 10.
  • One suitable overheat protection device would be the X2 element protector produced by Otter Controls Ltd and described in GB 2 308 921, the content of which is incorporated herein by reference.
  • the apparatus 10 is mounted such that the electric heater 28 forms the lower end of the chamber 16, as is shown in Figure 2. In this way, it can be ensured that the heater will always be covered by a pool of fluid. This reduces the likelihood of overheat damage of the electric heater.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cookers (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un appareil combiné composé d'une pompe et d'un élément chauffant, comprenant un boîtier de pompe (12, 14, 16) et un élément chauffant électrique (28). Le boîtier de pompe comporte une ouverture et l'élément chauffant électrique est disposé de manière à fermer au moins partiellement l'ouverture. En pratique, l'élément chauffant électrique est en contact direct avec le fluide qui est pompé par le boîtier de pompe. Cet appareil combiné convient tout particulièrement aux lave-vaisselle.
PCT/GB2006/002272 2005-06-23 2006-06-21 Appareil combine compose d'une pompe et d'un element chauffant Ceased WO2006136819A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0512853A GB2427437B8 (en) 2005-06-23 2005-06-23 Combined heater pump apparatus
GB0512853.3 2005-06-23

Publications (2)

Publication Number Publication Date
WO2006136819A2 true WO2006136819A2 (fr) 2006-12-28
WO2006136819A3 WO2006136819A3 (fr) 2007-06-14

Family

ID=34856054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/002272 Ceased WO2006136819A2 (fr) 2005-06-23 2006-06-21 Appareil combine compose d'une pompe et d'un element chauffant

Country Status (2)

Country Link
GB (1) GB2427437B8 (fr)
WO (1) WO2006136819A2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2150165A2 (fr) 2007-04-12 2010-02-10 BSH Bosch und Siemens Hausgeräte GmbH Pompe avec dispositif de chauffage
DE102008050895A1 (de) 2008-09-25 2010-04-01 E.G.O. Elektro-Gerätebau GmbH Pumpe für Fluide
DE102012218145A1 (de) * 2012-10-04 2014-04-24 E.G.O. Elektro-Gerätebau GmbH Impellerpumpe
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance
CN108245116A (zh) * 2018-01-30 2018-07-06 佛山市永脉家电技术开发有限公司 一种安全性高的洗碗机洗涤泵
CN110080988A (zh) * 2019-05-20 2019-08-02 佛山市顺德区美的洗涤电器制造有限公司 加热泵和洗碗机
CN110966204A (zh) * 2018-09-30 2020-04-07 青岛海尔洗碗机有限公司 一种加热型离心泵及家用电器
WO2021218927A1 (fr) * 2020-04-30 2021-11-04 佛山市顺德区美的洗涤电器制造有限公司 Élément de guidage d'écoulement, pompe collectrice de chaleur et lave-vaisselle
DE102012025758B3 (de) 2012-10-04 2021-12-02 E.G.O. Elektro-Gerätebau GmbH Impellerpumpe

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007053162A1 (de) * 2007-11-08 2009-05-14 Daimler Ag Pumpe und Brennstoffzellensystem mit einer derartigen Pumpe
ES2351271B1 (es) 2009-01-26 2011-11-15 Coprecitec, S.L. Bomba de circulación de fluido adaptada a un aparato electrodoméstico.
CN101984261B (zh) * 2010-11-19 2012-07-11 美的集团有限公司 一种油烟净化装置的离心风机蜗壳
DE102012202065B3 (de) 2012-02-10 2013-05-29 E.G.O. Elektro-Gerätebau GmbH Pumpe und Verfahren zum Beheizen einer Pumpe
DE102013202346B3 (de) * 2013-02-13 2014-05-28 E.G.O. Elektro-Gerätebau GmbH Impellerpumpe
CN104235061B (zh) * 2013-06-05 2015-06-10 宁波方太厨具有限公司 一种开放式水泵
CN105370622B (zh) * 2015-09-29 2019-01-29 广东威灵电机制造有限公司 流体加热泵送装置
CN112120629B (zh) * 2020-08-31 2022-02-08 宁波方太厨具有限公司 一种清洗机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3051182A (en) * 1957-10-04 1962-08-28 George M Gibson Fluid circulating power means for a dishwashing machine
DE19858137B4 (de) * 1998-12-16 2016-12-15 BSH Hausgeräte GmbH Heizung zum Erwärmen der Spülflüssigkeit in einer Geschirrspülmaschine
DE20018182U1 (de) * 2000-10-25 2001-12-13 Fritz Eichenauer GmbH & Co. KG, 76870 Kandel Pumpe mit einem beheizbaren Gehäuse
EP1201933B1 (fr) * 2000-10-25 2006-03-08 Eichenauer Heizelemente GmbH & Co.KG Boîtier de pompe avec réchauffeur du fluide intégré
DE10116671B4 (de) * 2001-04-04 2006-04-27 Miele & Cie. Kg Umwälzpumpe mit Heizungseinrichtung
PL372193A1 (en) * 2002-05-29 2005-07-11 Aweco Appliance Systems Gmbh & Co.Kg Household appliance
ITTO20040592A1 (it) * 2004-09-08 2004-12-08 Plaset Spa Chiocciola per una pompa centrifuga

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2150165A2 (fr) 2007-04-12 2010-02-10 BSH Bosch und Siemens Hausgeräte GmbH Pompe avec dispositif de chauffage
EP2377451A1 (fr) 2007-04-12 2011-10-19 BSH Bosch und Siemens Hausgeräte GmbH Pompe avec dispositif de chauffage
EP2377452A1 (fr) 2007-04-12 2011-10-19 BSH Bosch und Siemens Hausgeräte GmbH Pompe avec dispositif de chauffage
EP2384685A1 (fr) 2007-04-12 2011-11-09 BSH Bosch und Siemens Hausgeräte GmbH Pompe avec dispositif de chauffage
EP2384684A1 (fr) 2007-04-12 2011-11-09 BSH Bosch und Siemens Hausgeräte GmbH Pompe avec dispositif de chauffage
DE102008050895A1 (de) 2008-09-25 2010-04-01 E.G.O. Elektro-Gerätebau GmbH Pumpe für Fluide
WO2010034488A1 (fr) * 2008-09-25 2010-04-01 E.G.O. Elektro-Gerätebau GmbH Pompe pour fluide
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance
DE102012218145A1 (de) * 2012-10-04 2014-04-24 E.G.O. Elektro-Gerätebau GmbH Impellerpumpe
DE102012218145B4 (de) 2012-10-04 2018-12-27 E.G.O. Elektro-Gerätebau GmbH Impellerpumpe
DE102012025758B3 (de) 2012-10-04 2021-12-02 E.G.O. Elektro-Gerätebau GmbH Impellerpumpe
CN108245116A (zh) * 2018-01-30 2018-07-06 佛山市永脉家电技术开发有限公司 一种安全性高的洗碗机洗涤泵
CN108245116B (zh) * 2018-01-30 2023-11-07 佛山市永脉家电技术开发有限公司 一种安全性高的洗碗机洗涤泵
CN110966204A (zh) * 2018-09-30 2020-04-07 青岛海尔洗碗机有限公司 一种加热型离心泵及家用电器
CN110080988A (zh) * 2019-05-20 2019-08-02 佛山市顺德区美的洗涤电器制造有限公司 加热泵和洗碗机
WO2021218927A1 (fr) * 2020-04-30 2021-11-04 佛山市顺德区美的洗涤电器制造有限公司 Élément de guidage d'écoulement, pompe collectrice de chaleur et lave-vaisselle
US11879479B2 (en) 2020-04-30 2024-01-23 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Flow guiding element, heat collecting pump and dishwasher
US12234835B2 (en) 2020-04-30 2025-02-25 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Heat collecting pump and washing appliance

Also Published As

Publication number Publication date
GB2427437B8 (en) 2011-08-24
GB0512853D0 (en) 2005-08-03
GB2427437A (en) 2006-12-27
WO2006136819A3 (fr) 2007-06-14
GB2427437B (en) 2010-11-10
GB2427437A8 (en) 2011-08-24

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