EP2559370A1 - Appareil aquifère avec pompe à eau améliorée - Google Patents

Appareil aquifère avec pompe à eau améliorée Download PDF

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Publication number
EP2559370A1
EP2559370A1 EP11177791A EP11177791A EP2559370A1 EP 2559370 A1 EP2559370 A1 EP 2559370A1 EP 11177791 A EP11177791 A EP 11177791A EP 11177791 A EP11177791 A EP 11177791A EP 2559370 A1 EP2559370 A1 EP 2559370A1
Authority
EP
European Patent Office
Prior art keywords
water
pump
bearing appliance
appliance according
case
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
EP11177791A
Other languages
German (de)
English (en)
Other versions
EP2559370B1 (fr
Inventor
Marco Maiero
Joseph Migeot
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP11177791.8A priority Critical patent/EP2559370B1/fr
Publication of EP2559370A1 publication Critical patent/EP2559370A1/fr
Application granted granted Critical
Publication of EP2559370B1 publication Critical patent/EP2559370B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump

Definitions

  • the present invention relates to a water bearing appliance having a water circuit provided with an improved water pump.
  • said appliance may be a water bearing machine, such as a laundry washing and/or drying machine or a dishwasher.
  • a water bearing machine of known type like a laundry treating machine for example, has an article treating chamber adapted to receive articles to be treated and a water circuit for supplying and/or remove water to/from said chamber.
  • a water circuit is provided for collecting moisture condensed from wet laundry and for conveying such condensate to a reservoir.
  • all kind of water bearing household appliances has at least one pump device installed to move water from inside to outside of the machine or vice versa, or for moving water from a part to another within the machine itself.
  • the water used in a water bearing machine like a laundry treating machine for example, is re-circulated several times in order to be reused within an article treating chamber, such as a drum rotatably mounted in a tub, where the laundry is treated for carrying out a washing process thereon.
  • the water is drained from the tub, normally from a bottom portion thereof, through a pipe and then returned by means of a recirculation pump to the tub through an opening in an upper portion of the tub.
  • a recirculation pump includes an impeller chamber, for instance formed in a first end of a pump support which is made in the form of an open ended tube.
  • a motor head received in a second end of the tube opposite to the first end, drives an impeller which is set on the motor shaft and which is received within the impeller chamber.
  • the impeller chamber formed in the tube is closed by a discharge pipe coming from the tub of the washing machine and a sleeve protruding radially from the impeller chamber is hydraulically connected to a pipe that receives water pumped by the impeller.
  • the recirculation pump draws water from the discharge pipe and feeds it back into the tub, at the top thereof, via a return pipe.
  • a recirculation pump of such known type does not usually need, in normal operational conditions, to bear low temperatures. However it could happen that in exceptional conditions (e.g. if the household appliance is kept outdoor in winter time) or during pre-installation transport, the recirculation pump might encounter temperatures below 0°C.
  • the water remained inside the recirculation circuit could freeze and the volume increase due to the ice so formed could cause either the break of a portion of the discharge pipe coming from the tub of the washing machine and being connected to the recirculation pump or even the break of the impeller chamber.
  • a further possible damage due to the ice formation within the water recirculation circuit may consist in the disconnection of said discharge pipe from the pump impeller chamber. In fact, when the water inside the recirculation pump freezes, the discharge pipe and the impeller chamber are pushed apart from each other thereby causing a leakage in the recirculation circuit.
  • Japanese Patent Application Publication JP1099592 describes a pump for a washing machine in which, to prevent the pump from being damaged due to the freezing of water, a freely compressible hollow body is incorporated into a water storage part formed in the pump case.
  • a freely compressible hollow body When water in the pump case is frozen in winter, the freely compressible hollow body incorporated into the pump case absorbs the expansion in volume of ice to eliminate the imposition of pressure on the inner walls of the pump case. This prevents the breaking and cracking of the pump case due to freezing.
  • a further object of the present invention is to provide a water bearing appliance, in particular a washing machine, having a water circuit operated by a pump which can bear low temperatures without the need of containing an extraneous body.
  • Another object of the invention is to provide a water bearing appliance, in particular a washing machine, having a water circuit operated by a pump which can bear low temperatures without compromising the appliance functionality.
  • the object of the present invention is to provide a water bearing appliance, in particular a washing machine, having a water circuit operated by a pump whose case can adapt, i.e. change its shape, to compensate for the increased volume of the frozen water inside the pump.
  • a further object of the invention is to provide a water bearing appliance, in particular a washing machine, having a water circuit operated by a pump, as mentioned above, without increasing manufacturing cost and reducing productivity.
  • the present disclosure provides a water bearing appliance as set out in the accompanying claims.
  • a water bearing appliance comprising an article treating chamber and a water circuit having a pump for moving water within said water circuit, the pump comprising a case having walls forming a fluid accessible cavity, the water bearing appliance being characterized in that at least a portion of said case walls form a pressure-absorbing member which is adapted to elastically deform, so that the pressure caused by solidification of water contained in the case can be absorbed.
  • the case comprises a first portion having a first rigidity and a second portion having a second rigidity greater than said first rigidity, the first portion forming the pressure-absorbing member.
  • Said pressure-absorbing member can be in the form of a cap tightly closing said cavity.
  • a pump inlet pipe is connected to the cap and in a preferred embodiment such pump inlet pipe and the cap are integrally formed as a single unitary piece.
  • said pump inlet pipe is fluidly connected to the article treating chamber to receive water therefrom and said cavity accommodates a fluid impeller.
  • the case has a tubular structure comprising a first end closed by a cap and a second end closed by a motor device provided for driving a fluid impeller which is positioned within said tubular structure.
  • the pressure-absorbing member is made of an elastically deformable material comprising rubber or an elastomeric material
  • the water bearing appliance is in the form of a laundry treating machine, or a dishwasher.
  • the present invention further provides a pump as described above.
  • the present invention further provides a water bearing appliance wherein said water circuit drains water from a first region of the article treating chamber and reintroduces said water within the article treating chamber though a second region thereof by means of the pump.
  • the present invention offers a number of benefits.
  • One of the advantages is that there is no need of an extraneous body within the pump, while making the pump suitable to bear low temperatures. This feature is particularly advantageous because no additional spaces are to be included in the case of the pump for such compensation, nor any measures are to be taken to avoid undesirable movements of such extraneous body.
  • a pump according to preferred embodiment of the present invention is easy to mount and easy to produce, without increasing manufacturing cost and reducing productivity.
  • a laundry washing machine 1 includes a cabinet 102 containing the machine operational components, i.e. components that allows the machine to work for carrying out a treatment on laundry, a main water inlet pipe 104 hydraulically connected to a main water source, such as a public water net, for supplying water to the washing machine.
  • the main water inlet pipe 104 provides water to a treating agent dispenser 106 which is in turn hydraulically connected with a tub 101 where drum 108 is rotatably mounted.
  • Drum 108 defines an article treating chamber 110 adapted to receive articles 112 to be treated.
  • a water collector 114 placed on the tub 101 bottom portion, drains fluid from the tub 101 towards a water draining circuit 115 for exhausting it outside the machine.
  • the water draining circuit 115 comprises a discharge pipe 111 wherein a pump device 116 is provided for moving water within said circuit 115.
  • the wash water used in washing process is drawn from the tub 101 and returned thereto by means of a recirculation circuit 103.
  • the recirculation circuit 103 is composed of an outlet pipe 105 coming from the tub 101, a recirculation pump 107 and a return pipe 109.
  • outlet pipe 105 is, for instance, a branch from the discharge pipe 111 for drainage of the water from inside the tub 101 and also forms the recirculation pump inlet pipe.
  • a return pipe 109 originates from the recirculation pump 107 and is connected to an upper portion of the tub 101.
  • the recirculation pump 107 draws water from the tub bottom portion via the water collector 114 and feeds said water back to the tub 101, at the top thereof via the return pipe 109.
  • a recirculation pump 107 according to a preferred embodiment of the present invention is shown.
  • One open end 220 of the tube 203 is closed by the head 219 of a motor 209 fastened to the tube 203 by means of fastening screws 211.
  • the other open end 230 of the tube 203 is closed by a cap 301, fastened to the tube 203 by means of a retention ring 303.
  • the walls of the case formed by cap 301 and tube 203 form a fluid accessible cavity 309.
  • a pump inlet pipe 305 is connected to the cap 301 for supplying water to the impeller chamber 208 .
  • Said pump inlet pipe 305 may extend in length so as to form the outlet pipe 105 which is hydraulically connected to the tub 101 and, in turn, to the article treating chamber 110 of the washing machine (see Figure 1 ).
  • the pump inlet pipe 305 and the cap 301 may be integrally formed as a single unitary piece.
  • An outlet opening 307, communicating with the impeller chamber 208, is also provided on the pump support 201 for allowing pumped water to leave the impeller chamber 208.
  • the water recirculation pump 107 has an impeller 501 which is housed within the impeller chamber 208 and it is keyed onto the motor shaft 215, so that it remains within the tube 203.
  • the water is pumped by the impeller 501 through the outlet opening 307 and through the recirculation circuit 103 to be fed back to the article treating chamber 110 of the water bearing appliance 1.
  • a different pumping device other than the motor can be used, for instance a gear or a pair of gear in the case of a gear pump, or a diaphragm connected to a reciprocating driving device in the case of a diaphragm pump.
  • a portion of the case is made of an elastically deformable material so as to form a pressure absorbing member.
  • said case may comprise a first portion having a first rigidity and a second portion having a second rigidity greater than the first rigidity, the first portion forming the pressure absorbing member. Said rigidity of the case portions being conferred by the material used to form them and by their shape.
  • the cap 301 forms the pressure absorbing member made of an elastically deformable material (e.g. rubber).
  • Alternative embodiments are possible, e.g.
  • the tube 203 could be totally or partially made of elastically deformable material.
  • a bottom part of the tube 203 could be provided with a cap of an elastically deformable material having the same function described for the cap 301.
  • Another possible alternative is that several small portions of the tube 203 or the cap 301 are made of an elastically deformable material, e.g. the cap 301 could be made of a rigid material with some opening (e.g. in the forms of circles) which are sealed with an elastically deformable material (e.g. rubber) acting as pressure absorbing members.
  • an elastically deformable material e.g. rubber
  • the elastically deformable material can be rubber or an elastomeric material or any other suitable material, which can be preferably shaped in the form of a cap or other similar component, is waterproof and resistant to low temperature.
  • the selected material must be able to deform elastically so as to expand or contracting for absorbing the deformation caused to the walls of the cavity 309 by the pressure generated by the increase of volume due to the freezing of water included in the cavity 309. The same material allows the pressure absorbing member to return in its original shaped when ice melts.
  • the present invention provides a water bearing appliance, e.g. a washing machine, having a recirculation pump whose case can adapt its shape and/or its inner size to compensate for the increased volume of the frozen water inside the recirculation pump.
  • the pressure absorbing member e.g. the cap 301 or the bottom part of the tube 203, permits, at lower temperature, the expansion of the impeller chamber 208 and do not cause any damages at the recirculation pump assembly.
  • the provision of a pressure absorbing member allows also the connection between the pump inlet pipe 305 and tube 203 made by a retention ring 303 to remain stable and tight.
  • the recirculation pump is improved by a simple solution, easy to implement, without increasing manufacturing cost and reducing productivity.
  • the resistance of the circuit at very low temperature is improved without damages caused by ice and its expansion.
  • a pump made in accordance with the present invention can be easily produced, using techniques which will be apparent to those skilled in the art, thus not affecting the manufacturing cost and the productivity.
  • the components e.g. the cap or the motor
  • the present invention may be extended to a large variety of water bearing appliances not only to a laundry washing machine that has been used in the above description as mere example of how the present invention may be embodied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP11177791.8A 2011-08-17 2011-08-17 Appareil aquifère avec pompe à eau améliorée Active EP2559370B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11177791.8A EP2559370B1 (fr) 2011-08-17 2011-08-17 Appareil aquifère avec pompe à eau améliorée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11177791.8A EP2559370B1 (fr) 2011-08-17 2011-08-17 Appareil aquifère avec pompe à eau améliorée

Publications (2)

Publication Number Publication Date
EP2559370A1 true EP2559370A1 (fr) 2013-02-20
EP2559370B1 EP2559370B1 (fr) 2014-03-26

Family

ID=44674276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11177791.8A Active EP2559370B1 (fr) 2011-08-17 2011-08-17 Appareil aquifère avec pompe à eau améliorée

Country Status (1)

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EP (1) EP2559370B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3009557A1 (fr) * 2013-06-14 2016-04-20 LG Electronics Inc. Lave-linge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681947A (en) * 1971-03-23 1972-08-08 Whirlpool Co Combination drain manifold and self-cleaning filter
JPH0199592A (ja) 1987-10-14 1989-04-18 Sanyo Electric Co Ltd 電気かみそり
JPH1099592A (ja) * 1996-09-27 1998-04-21 Matsushita Electric Ind Co Ltd 洗濯機等のポンプ装置
EP1607511A2 (fr) * 2004-06-15 2005-12-21 Samsung Electronics Co., Ltd. Pompe de vidange et machine à laver à tambour correspondante
WO2006126813A2 (fr) * 2005-05-23 2006-11-30 Lg Electronics Inc. Generateur de vapeur et lave-linge possedant ledit generateur
US20100175727A1 (en) * 2009-01-09 2010-07-15 Samsung Electronics Co., Ltd. Washing machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681947A (en) * 1971-03-23 1972-08-08 Whirlpool Co Combination drain manifold and self-cleaning filter
JPH0199592A (ja) 1987-10-14 1989-04-18 Sanyo Electric Co Ltd 電気かみそり
JPH1099592A (ja) * 1996-09-27 1998-04-21 Matsushita Electric Ind Co Ltd 洗濯機等のポンプ装置
EP1607511A2 (fr) * 2004-06-15 2005-12-21 Samsung Electronics Co., Ltd. Pompe de vidange et machine à laver à tambour correspondante
WO2006126813A2 (fr) * 2005-05-23 2006-11-30 Lg Electronics Inc. Generateur de vapeur et lave-linge possedant ledit generateur
US20100175727A1 (en) * 2009-01-09 2010-07-15 Samsung Electronics Co., Ltd. Washing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3009557A1 (fr) * 2013-06-14 2016-04-20 LG Electronics Inc. Lave-linge
EP3009557A4 (fr) * 2013-06-14 2017-04-05 LG Electronics Inc. Lave-linge
US10428451B2 (en) 2013-06-14 2019-10-01 Lg Electronics Inc. Washing machine with water supply distributor

Also Published As

Publication number Publication date
EP2559370B1 (fr) 2014-03-26

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