US20150191861A1 - Washing machine provided with a recirculation circuit - Google Patents

Washing machine provided with a recirculation circuit Download PDF

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Publication number
US20150191861A1
US20150191861A1 US14/415,250 US201314415250A US2015191861A1 US 20150191861 A1 US20150191861 A1 US 20150191861A1 US 201314415250 A US201314415250 A US 201314415250A US 2015191861 A1 US2015191861 A1 US 2015191861A1
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US
United States
Prior art keywords
conduit
tub
washing machine
end portion
fluid
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.)
Abandoned
Application number
US14/415,250
Other languages
English (en)
Inventor
Mauro Alessandrini
Renato Costantini
Mariangiola Dottori
Gianluca Ferro
Mauro Mancini
Mariarosaria Schettini
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co 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 Indesit Co SpA filed Critical Indesit Co SpA
Publication of US20150191861A1 publication Critical patent/US20150191861A1/en
Abandoned legal-status Critical Current

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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
    • D06F39/083—Liquid discharge or recirculation arrangements
    • 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
    • D06F39/081—Safety arrangements for preventing water damage
    • 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
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups

Definitions

  • the present invention refers to a washing machine provided with a recirculation circuit.
  • washing machines and in particular washing machines and washer-dryers, include a support frame, on which a washing tub is mounted, inside which rotates a drum, wherein the garments to be washed are placed.
  • the tub has an opening through which the access to the drum is possible and clothes can be placed inside the drum.
  • Such machines also comprise a controlled hydraulic system, which provides the water supply, suitably mixed with detergent substances, so that the garments are subjected to the washing process.
  • a recirculation circuit which has the aim to facilitate the dissolution of the detergent in the water and to promote the circulation of water and detergent into the tub.
  • FIG. 1 of that document An exemplary recirculation circuit is disclosed in U.S. 2005/0132758 A1.
  • the conduit 110 output from the washing tub, which conveys the water and the detergent to the pump 130 .
  • the latter provides to convey the water and the detergent towards the valve 150 .
  • the washing fluid can be selectively inserted in the conduit 120 , to then be distributed in a “rain mode” on the drum, or it can be diverted into the conduit 140 , which brings it back to the pump 130 so as to define a closed circuit substantially outside the tub.
  • the valve 140 is controlled on the basis of the fact that the detergent needs to be further dissolved in water (deviation inside the conduit 140 ), or on the basis of the fact that the washing fluid should foe distributed on the garments to foe washed (forwarding to the conduit 120 ).
  • washing machine described in this document is characterized by a considerable constructional complexity and consequent particularly significant difficulty of assembly.
  • the object of the present invention is to provide a washing machine having a simplified structure, which can be easily and quickly assembled.
  • Another object of the invention is to provide a washing machine which has lower implementation costs.
  • Another object of the invention is to provide a washing machine able to optimize the cleaning action of the washing fluid by means of its recirculation circuit.
  • An idea underlying the invention provides for the arrangement, in a washing machine, of a recirculation circuit comprising a first conduit, a recirculation pump and a second conduit, wherein:
  • the Applicant believes that, in this way, a washing machine can be implemented wherein the recirculation circuit has a particularly simplified structure, easy to assemble and with a lower cost.
  • the second conduit allows a reintroduction of the fluid into the tub through a lower surface of the tub itself.
  • the end portion of the outlet conduit has a substantially cylindrical shape; the first conduit leads to a first radial opening of such an end portion.
  • the second conduit has a first end connected to the recirculation pump, and a second end leading to the tub.
  • the second end of the second conduit leads to the tub in a different position with respect to the end portion of the outlet conduit.
  • the outlet conduit comprises a main body and the aforementioned end portion; the main body and the end portion being particularly formed enbloc, preferably of elastomeric material.
  • the second conduit has a first end connected to the recirculation pump and a second end leading to the end portion of the outlet conduit.
  • the outlet conduit comprises a main body and the aforementioned end portion; the main body and the end portion being particularly distinct pieces and fluid-tightly assembled together to define the outlet conduit.
  • the tub and the main body are associated with respective longitudinal ends of the aforementioned end portion having a cylindrical shape, preferably the second conduit pertains to a second radial opening of such an end portion.
  • the angular distance between the first radial opening and the second radial opening ranges from 80° to 100°.
  • the end portion has a connection member formed so as to convey toward the inside of the washing tub the washing fluid coming out from the second conduit.
  • connection member is substantially “L-shaped”.
  • the washing machine according to the invention also comprises a substantially box-like support structure, having a bottom surface, a top surface, a front surface and a back surface, and a pair of opposed lateral surfaces; preferably the recirculation pump is mounted close to a corner defined by the back surface and the bottom surface.
  • the recirculation pump has an inlet connected to the first conduit and an outlet connected to the second conduit.
  • the inlet of the recirculation pump is to a lesser extent compared to the outlet of the pump itself.
  • the inlet of the recirculation pump is extends in a direction substantially parallel to a bottom surface of the washing machine; and preferably the outlet of the recirculating pump extends in a direction transverse, preferably substantially orthogonal with respect to the bottom surface.
  • first and/or second conduit have a corrugated shape, at least at a substantially middle portion thereof.
  • the recirculation circuit further includes a removable insert mounted at the second end of the second conduit; particularly said insert is such as to divert the flow of the fluid coming out from the second conduit by substantially 90° and make the same flow substantially parallel to the bottom the tub.
  • the recirculation pump comprises a volute formed enbloc with a protective element or cover, the latter being adapted to protect said recirculation pump from any water leakage.
  • the tub has, in a lower portion thereof, a connection collar molded to an outer surface of the tub itself for a connection with said second conduit, particularly the collar connection is natively blind, and the blind end of such a connection collar is adapted to be opened by a boring operation for providing fluid communication between the second conduit and the interior of the tub.
  • a connection collar molded to an outer surface of the tub itself for a connection with said second conduit, particularly the collar connection is natively blind, and the blind end of such a connection collar is adapted to be opened by a boring operation for providing fluid communication between the second conduit and the interior of the tub.
  • FIG. 1 shows a perspective view of a first embodiment of a washing machine according to the invention, with some parts removed to better illustrate others.
  • FIG. 2 shows a detail of the washing machine of FIG. 1 .
  • FIG. 3 shows a side view of the washing machine of FIG. 1 .
  • FIG. 4 shows a detail of the washing machine of FIG. 1 .
  • FIG. 5 shows an exploded view of the detail of FIG. 4 .
  • FIG. 6 shows a perspective view of a second embodiment of a washing machine in accordance with the invention, in which some parts have been removed to better illustrate others.
  • FIG. 7 shows a detail of FIG. 6 .
  • FIG. 8 shows a plan view of the detail of FIG. 7 .
  • 1 denotes in its entirety a washing machine in accordance with the present invention.
  • the washing machine 1 is preferably a washing machine or a washer-dryer.
  • the washing machine 1 may be a front loading washing machine or, alternatively, a top-loading washing machine.
  • the washing machine 1 comprises a support structure 70 ( FIGS. 1 , 3 , 6 ) being substantially box-like, for example substantially parallelepiped.
  • the support structure 70 has a bottom surface 71 , a top surface 72 , a front surface 73 , a back surface 74 , and a pair of opposed lateral surfaces 75 , 76 .
  • a washing tub 10 Inside the support structure 70 is arranged a washing tub 10 , wherein a drum 20 is rotatably mounted.
  • the tub 10 has a loading opening, through which the garments to be washed can be placed.
  • the load opening is closed by a door 15 ( FIG. 3 ).
  • the door 15 may comprise a transparent porthole, which allows the user to observe the internal portion of the drum 20 and the garments placed therein. In different embodiments, the door 15 is entirely opaque and does not allow such observation.
  • the drum 20 is rotatably driven by suitable actuators, known per se and therefore not described in detail below.
  • a fluid which, depending on the single washing step, can include only water, or water mixed with one or more detergents.
  • An outlet conduit 40 is connected to the tub 10 for conveying the fluid out of the tub 10 itself; the outlet conduit 40 , also called exhaust bellows, is connected to a drain pump (not shown) in turn connected to a further outflow conduit (also not shown), so as to exhaust the fluid at the end of predetermined washing or rinsing steps.
  • the outlet conduit 40 comprises a main body 30 and an end portion 50 .
  • the main body 30 can be made of elastomeric material, and is provided with a portion “bellows-shaped”, schematically illustrated for example in FIGS. 3-5 and 7 - 8 .
  • the end portion 50 preferably has a substantially cylindrical shape.
  • the main body 30 and the end portion 50 are formed enbloc.
  • the end portion 50 is made of elastomeric material.
  • the main body 30 and the end portion 50 are made as distinct pieces, fluid-tightly assembled together so as to enable a correct outflow of fluid coming out from the tub 10 .
  • the end portion 50 can be made of different material (e.g. a plastic material) with respect to the main body 30 .
  • the washing machine 1 also comprises a recirculation circuit 60 .
  • the recirculation circuit 60 in turn comprises a first conduit 61 , a recirculation pump 62 and a second conduit 63 .
  • the first conduit 61 connects the end portion 50 of the outlet conduit 40 to the recirculation pump 62 .
  • the second conduit 63 allows a connection between the recirculation pump 62 and the tub 10 . As will be more clear in the following, the characteristics of this connection will be different depending on the embodiment of the washing machine 1 .
  • the recirculation pump 62 is configured to draw the fluid from the tub 10 through the first conduit 61 and to feed said fluid back into the tub 10 through the second conduit 63 .
  • the recirculation pump 62 may be mounted within the support structure 70 close to a corner defined by the back surface 74 and by the bottom surface 71 of the structure 70 itself.
  • volute 62 c wherein the impeller of the recirculation pump 62 is mounted, is formed enbloc with a protective element or cover 62 d, which protects the circulation pump 62 itself from any water leakage, and therefore assigns particular safety to the washing machine 1 .
  • the recirculation pump 62 has an inlet 62 a and an outlet 62 b ( FIG. 5 ).
  • the inlet 62 a is connected to the first conduit 61
  • the output 62 b is connected to the second conduit 63 , and in particular at a first end 63 a of the latter.
  • the inlet 62 a of the recirculation pump 62 is located at a lower height than the outlet 62 b of the pump 62 itself.
  • the inlet 62 a extending in a direction substantially parallel to the bottom surface 71
  • the output 62 b extending in a transverse direction, and preferably substantially orthogonal, with respect to the bottom surface 71 thereof.
  • the inlet 62 a extending in a substantially horizontal direction (i.e. parallel to the ground), while the outlet 62 b extending in a substantially vertical direction ( FIGS. 1 and 6 ).
  • the bottom of the tub 10 accumulates a quantity of fluid which, as aforementioned, can be constituted by a mixture of water and detergent. Thanks to the recirculation circuit 60 , and in particular to the defined path, in succession, by the first conduit 61 , the circulation pump 62 and the second conduit 63 , it is possible to feed back into the tub 10 the cleaning fluid, optimizing the dissolution of the detergent in water and reusing the fluid until the conclusion of the washing phase provided.
  • the second conduit allows a reintroduction of the fluid into the tub 10 through a lower surface 10 a of the latter. Therefore the recirculation circuit 60 having an extremely simple structure and easy to assemble, as well as having particularly reduced overall dimensions.
  • the first conduit 61 leads to a first radial opening 51 of the end portion 50 .
  • the first radial opening 51 may be associated with a fitting, so as to facilitate the connection with the first conduit 61 .
  • the first conduit 61 in correspondence with the first radial opening 51 , there are one or more fins, which serve as a reference during assembly: the first conduit 61 , in correspondence of its end adapted to be coupled to the first radial opening 51 , has in turn appropriate signs or reference marks, which must be properly aligned to the aforementioned fins for a correct mutual orientation of the various parts.
  • the first conduit 61 is connected to an opening formed in the lateral surface of said cylindrical shape ( FIGS. 4-5 ).
  • the second conduit 63 has a first and a second end 63 a, 63 b.
  • the first end 63 a is connected to the recirculation pump 62 (in particular the outlet 62 b of the same), while the second end 63 b leads to the tub 10 .
  • the second end 63 b is connected to a lower surface of the tub 10 itself.
  • the second end 63 b of the second conduit 63 pertains to the tub 10 in a different position with respect to the end portion 50 of the outlet conduit 40 .
  • the end portion 50 of the outlet conduit 40 is connected to the tub 10 in a position closer to the front surface 73
  • the second end 63 b of the second conduit is connected to the tub 10 in a position closer to the back surface 74 .
  • a removable insert is mounted, which diverts the fluid substantially by 90° and makes it substantially parallel to the bottom of the tub 10 , so that any detergent accumulated on the bottom of the tub 10 itself may be hit by this flow and being then reactivated.
  • a collar co-molded with the outer surface of the tub 10 itself.
  • this collar is blind, i.e. is defined by a substantially cylindrical element extending from the outer surface of the tub 10 , but is separated from the inside of the tub 10 by the outer surface of the latter.
  • the washing machines wherein the system according to the invention is actually applied such as the washing machine 1 described and claimed herein
  • via a boring operation of the bottom of said cylindrical element will be possible to realize the connection with the second conduit 63 .
  • the first end 63 a of the second conduit 63 is connected to the recirculation pump 62 (similarly to the first embodiment), while a second end 63 b of the second conduit 63 itself leads to the end portion 50 of the outlet conduit 40 .
  • tub 10 and the main body 30 are associated with respective longitudinal ends 50 a, 50 b of the end portion 50 , while the second conduit 63 leads to a second radial opening 52 formed in the lateral surface of the end portion 50 thereof.
  • first conduit 61 is associated with a respective first radial opening 51 formed in the lateral surface of the end portion 50 .
  • the angular distance between the first radial opening 51 and the second radial opening 52 ranges from 80° to 100°.
  • this angular distance may be substantially equal to approximately 90°, as shown in FIG. 8 .
  • FIGS. 7-8 show a connection member 53 , forming part of the end portion 50 of the outlet conduit 40 .
  • connection member 53 is shaped so as to convey the fluid coming out from the second conduit 63 toward the interior of the tub 10 .
  • connection member 53 being substantially “L-shaped”, preferably having a first portion substantially aligned with the second end 63 b of the second conduit 63 , and a second portion substantially orthogonal to the first portion and leading towards the interior of the washing tub 10 .
  • connection member 53 has the task of facilitating the flow towards the interior of the tub 10 of the fluid that has flown inside the recirculation circuit 60 .
  • first and/or second conduit 61 , 63 are formed enbloc with two different materials.
  • first and/or second conduit 61 , 63 are substantially transparent.
  • At least a substantially central portion of the first and/or second conduit 61 , 63 may advantageously have a corrugated shape, so as to increase the turbulence of the fluid flowing inside and facilitate the activation of the detergent.
  • a switch (not shown), comprising for example a solenoid or a thermal actuator.
  • This diverter can be driven in at least two operating configurations: in a first configuration, it allows a flow of fluid within the second conduit 63 (from the recirculation pump 62 to the tub 10 ), while in the second configuration it diverts the flow to an auxiliary conduit (not shown), which carries the fluid up to an upper end of the tub 10 . In this way the fluid can be sprayed inside the tub by a different position, for example in the vicinity of the upper portion of the gasket surrounding the porthole.
  • the diverter is suitably driven by the electronic control system of the washing machine 1 , for example time-based or depending on the measurements performed by a sensor capable of generating signals representative of the level of water inside the tub.
  • the control technique provides that a limited amount of water should be retained in the lower part of the tub 10 (in correspondence of a resistor, not shown, used to heat water); when the existing water exceeds a predetermined threshold, the diverter is controlled so as to interrupt the recirculation (that through the second conduit 63 enters again the fluid in the lower part of the tub 10 ), and to divert the flow toward said auxiliary conduit.
  • the washing fluid is inserted into the tub 10 and the drum 20 , comprising water and one or more detergent substances.
  • Such fluid tends to accumulate on the bottom of the tub 10 , in particular near said back surface 10 a of the tub 10 itself.
  • the fluid is made to slide in the outlet conduit 40 and, via the drain pump, sent outside of the washing machine 1 .
  • the fluid is made to slide in the recirculation circuit 60 , by means of the first conduit 61 , the recirculation pump 62 and the second conduit 63 .
  • the activation of the recirculation pump 62 for each cycle occurs after about 5 minutes, during which a water heating step is carried out; and the pump 62 is activated when it reaches a predetermined target temperature.
  • the recirculation pump 62 then remains active for the next 15-20 minutes. Thereafter, it is activated for about 30 seconds at regular intervals of about 10 minutes, until the conclusion of the mechanical washing. It should be noted that the periods can vary slightly depending on the cycle run.
  • the recirculation circuit 60 is also active during the rinsing phases: in particular for a time of about 30 seconds during the exchange time of each rinsing, and at the end of the final spin during unloading.
  • the invention achieves important advantages.
  • the washing machine according to the invention has a simplified structure, which can be easily and quickly assembled.
  • a further advantage consists in the fact that the washing machine according to the invention is able to optimize the cleaning action of the washing fluid by means of its recirculation circuit, since it obtains a premature mixing in the water of the washing agent, so that it can be effective in a quicker time.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US14/415,250 2012-07-19 2013-07-10 Washing machine provided with a recirculation circuit Abandoned US20150191861A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT000637A ITTO20120637A1 (it) 2012-07-19 2012-07-19 Lavabiancheria con circuito di ricircolo
ITTO2012A000637 2012-07-19
PCT/IB2013/055653 WO2014013388A1 (en) 2012-07-19 2013-07-10 Washing machine provided with a recirculation circuit

Publications (1)

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US20150191861A1 true US20150191861A1 (en) 2015-07-09

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US14/415,250 Abandoned US20150191861A1 (en) 2012-07-19 2013-07-10 Washing machine provided with a recirculation circuit

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US (1) US20150191861A1 (it)
EP (2) EP3546635A1 (it)
EA (1) EA201590249A1 (it)
IT (1) ITTO20120637A1 (it)
WO (1) WO2014013388A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110644181A (zh) * 2018-06-27 2020-01-03 Lg电子株式会社 洗衣机
KR20200001494A (ko) * 2018-06-27 2020-01-06 엘지전자 주식회사 세탁기
US12553171B2 (en) 2022-09-22 2026-02-17 Whirlpool Corporation Recirculation hose routing for a laundry appliance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2703546A1 (en) 2012-08-29 2014-03-05 Electrolux Home Products Corporation N.V. Laundry washing machine
KR102459589B1 (ko) 2018-01-05 2022-10-26 엘지전자 주식회사 세탁기 및 세탁기의 제어방법

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110644181A (zh) * 2018-06-27 2020-01-03 Lg电子株式会社 洗衣机
KR20200001494A (ko) * 2018-06-27 2020-01-06 엘지전자 주식회사 세탁기
US11377775B2 (en) * 2018-06-27 2022-07-05 Lg Electronics Inc. Washing machine
KR102688977B1 (ko) 2018-06-27 2024-07-26 엘지전자 주식회사 세탁기
US12553171B2 (en) 2022-09-22 2026-02-17 Whirlpool Corporation Recirculation hose routing for a laundry appliance

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EP2875176A1 (en) 2015-05-27
WO2014013388A1 (en) 2014-01-23
EP2875176B1 (en) 2019-12-04
ITTO20120637A1 (it) 2014-01-20
EA201590249A1 (ru) 2016-05-31
EP3546635A1 (en) 2019-10-02

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