EP2746450A1 - Machine à laver le linge - Google Patents

Machine à laver le linge Download PDF

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Publication number
EP2746450A1
EP2746450A1 EP12199173.1A EP12199173A EP2746450A1 EP 2746450 A1 EP2746450 A1 EP 2746450A1 EP 12199173 A EP12199173 A EP 12199173A EP 2746450 A1 EP2746450 A1 EP 2746450A1
Authority
EP
European Patent Office
Prior art keywords
machine
tub
air chamber
washing tub
liquid
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Withdrawn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
EP12199173.1A
Other languages
German (de)
English (en)
Inventor
Paolo Barro
Igor Colin
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 EP12199173.1A priority Critical patent/EP2746450A1/fr
Publication of EP2746450A1 publication Critical patent/EP2746450A1/fr
Withdrawn legal-status Critical Current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
    • D06F39/087—Water level measuring or regulating devices

Definitions

  • the present invention concerns the field of laundry washing techniques.
  • the present invention refers to a laundry washing machine equipped with a level sensing device for sensing the liquid level in the machine.
  • laundry washing machines both "simple” laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry), is widespread.
  • Laundry washing machine will refer to both simple laundry washing machines and laundry washing-drying machines.
  • Laundry washing machines generally comprise an external casing provided with a washing tub which contains a rotatable perforated drum where the laundry is placed.
  • a loading/unloading door ensures access to the drum.
  • Laundry washing machines typically comprise a water inlet circuit and a products supply unit for the introduction of water and washing/rinsing products (i.e. detergent, softener, etc.) into the tub.
  • water and washing/rinsing products i.e. detergent, softener, etc.
  • drain liquid devices that may operate during different phases of the washing cycle in order to drain liquid from the bottom of the tub and to convey the liquid either to the outside or inside the same washing tub.
  • the drain liquid device is part of a recirculation circuit.
  • the drain liquid devices typically drain water from the tub by means of a discharge pipe connected to the bottom of the tub.
  • the laundry washing machines of know type are also typically equipped with a level sensing device for sensing the liquid level in the machine.
  • the liquid level detected by this device is opportunely used, for example, to correctly activate the water inlet circuit and the drain liquid device during the phases of the washing cycle.
  • Level sensing devices of known type comprise a pressure sensor, or pressure switch, which communicates with an air volume enclosed in an air chamber via a narrow conduit.
  • the air chamber is typically arranged in the bottom part of the washing machine and is connected to the drain liquid device. More particularly, the air chamber communicates with the discharge pipe at the bottom of the tub.
  • the air chamber is connected to the discharge pipe in such a way that the liquid in the chamber reflects the liquid level in the machine.
  • the air volume enclosed above the liquid in the chamber is therefore subjected to a pressure which is sensed by the pressure sensor and then translated into a measure of the liquid level in the machine.
  • a laundry washing machine showing an air chamber for a pressure sensor is disclosed in document CN201598461U .
  • the air chamber disclosed in such document is realized in two parts: a lower part connected to the discharge pipe at the bottom of the tub and an upper closing part.
  • the closing part then communicates with the pressure sensor.
  • the two parts are assembled to define an air volume therein and the upper part is fixed to the washing tub by means of additional fastening elements.
  • the air chambers of known type realized in two parts have the upper part which is fixed to the washing tub by means of fastening elements, like clamps or iron wires.
  • a first drawback posed by this known technique is constituted by the fact that the level sensing device is composed by a great number of pieces.
  • a further drawback posed by this known technique is constituted by the high failure rate due to the complex structural construction of the air chamber.
  • the aim of the present invention is therefore to solve the noted drawbacks and thus providing a laundry washing machine having an improved liquid level sensing device arrangement.
  • Another object of the present invention is to provide a laundry washing machine that lasts longer than machines of known type.
  • the level sensing device comprises an air chamber having a first part obtained in a single piece construction with the washing tub, fixedly connected to a liquid conveying portion and communicating therewith through a chamber inlet, and a second part associable to the first part and communicating with the air pressure sensor through a chamber outlet, it is possible to obtain a laundry washing machine having reduced manufacturing and/or assembling time and costs compared to the machines of known type.
  • the present invention relates, therefore, to a laundry washing machine comprising:
  • the second part of the air chamber and the washing tub are made with a plastic material, preferably by moulding, more preferably by injection moulding.
  • the machine comprises a connecting portion, preferably a rib, obtained in a single piece construction with the tub and the second part and connecting the second part of the air chamber to the washing tub.
  • the liquid conveying portion of the water outlet circuit is or is part of a drain hose.
  • the liquid conveying portion of the water outlet circuit is or is part of an integrated drain pump.
  • the first part of the air chamber is obtained in a single piece construction with the liquid conveying portion.
  • the first part of the air chamber and the liquid conveying portion are made with a plastic material, preferably by moulding, more preferably by injection moulding.
  • the machine comprises a fastening device suitable for connecting the liquid conveying portion to the washing tub at said discharge outlet.
  • the first part and/or the second part are substantially cylindrically or prismatic or parallelepiped shaped.
  • the liquid conveying portion is arranged below the discharge outlet.
  • the chamber inlet is arranged below the discharge outlet.
  • the second part of the air chamber is realized at a lower portion of the washing tub.
  • the washing tub comprises two complementary hemi-shells reciprocally coupled.
  • the second part of the air chamber is obtained in a single piece construction with one of the hemi-shells or the second part is obtained partially in a single piece construction with one of the hemi-shells and partially in a single piece construction with the other hemi-shell in such a way that when the first and second hemi-shells are assembled one another for forming the tub, also the second part is assembled.
  • the discharge outlet is defined by a collar portion, the collar portion comprising a wall surrounding a longitudinal axis of the collar portion and the said second part comprises a wall surrounding a longitudinal axis of the second part, wherein the longitudinal axis of the collar portion is parallel to the longitudinal axis of the second part.
  • the machine of the invention is a laundry washing-drying machine.
  • the present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to laundry washing machines. On the contrary, the present invention can be conveniently applied to laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry).
  • laundry washing machine will refer to both simple laundry washing machines and laundry washing-drying machines.
  • Figure 1 shows a laundry washing machine 1 according to a preferred embodiment of the invention.
  • the laundry washing machine 1 comprises an external casing or housing 2, in which a washing tub 3 is provided that contains a rotatable drum 4, visible in Figures 2 and 6 , where the laundry to be treated can be loaded.
  • the housing 2 is provided with a loading/unloading door 8 which allows access to the washing drum 4.
  • the tub 3 is preferably suspended in a floating manner inside the housing 2, advantageously by means of a number of coil springs and shock-absorbers, not illustrated.
  • the drum 4 is advantageously rotated by an electric motor, not illustrated, which preferably transmits the rotating motion to the shaft of the drum 4, advantageously by means of a belt/pulley system.
  • the motor can be directly associated with the shaft of the drum 4.
  • the tub 3 is preferably connected to the casing 2 by means of an elastic bellows 7, or gasket.
  • the tub 3 preferably comprises two complementary hemi-shells 13 and 14 structured for being reciprocally coupled to form the tub 3.
  • the hemi-shells 13 and 14, namely a front hemi-shell 13 and a rear hemi-shell 14, are realized separately and then fixedly connected to form the tub 3.
  • the hemi-shells 13 and 14 comprise a plastic material and are preferably realized by injection moulding.
  • the lower portion 3a of the tub 3 preferably comprises a seat 17 suitable for receiving a heater device, not illustrated.
  • the seat 17 is made in a single piece with the tub 3.
  • the laundry washing machine 1 preferably comprises a water supply circuit preferably arranged in the upper part of the laundry washing machine 1 and suited to supply water into the tub 3.
  • the water supply circuit of a laundry washing machine is well known in the art, and therefore it will not be described in detail.
  • the laundry washing machine 1 advantageously comprises a removable drawer 6 provided with various compartments suited to be filled with washing and/or rinsing products (i.e. detergent, softener, etc.).
  • washing and/or rinsing products i.e. detergent, softener, etc.
  • the laundry washing machine 1 advantageously comprises a water outlet circuit 25, only partially illustrated in Figures from 2 to 7, suitable for withdrawing liquid from the lower portion 3a of the tub 3.
  • the lower portion 3a of the tub 3 is provided with a discharge outlet 26 through which the liquid may be withdrawn from the tub 3, and preferably drained outside the machine.
  • the discharge outlet 26 is preferably defined by a collar portion 27.
  • the collar portion 27 comprises a wall 27a which surrounds a longitudinal axis Y1 of the collar portion 27, passing preferably through the centre of the collar portion 27, as illustrated in Figure 5 .
  • the collar portion 27 comprises a wall 27a which is advantageously substantially parallel to the longitudinal axis Y1, passing preferably through the centre of the collar portion 27.
  • the collar portion 27 is therefore preferably cylindrically or prismatic or parallelepiped shaped.
  • the collar portion may comprise a wall differently shaped, for example shaped like a bell, and suitable to be realized by injection moulding with simple steps.
  • the water outlet circuit 25 preferably comprises a drain hose 70 arranged below the discharge output 26.
  • the liquid withdrawn from the tub 3 may be conveyed either to the outside or inside the same washing tub 3.
  • the water outlet circuit 25 belongs to a recirculation circuit, not illustrated, which preferably withdraws liquid from the the lower portion 3a of the tub 3 and re-admits such a liquid into an upper region of the tub 3.
  • the laundry washing machine 1 comprises a level sensing device 19 suited to sense (or detect) the liquid level inside the tub 3.
  • the level sensing device 19 preferably comprises a pressure sensor 50, or pressure switch and an air chamber 51 enclosing an air volume.
  • the air chamber 51 preferably comprises a first part 52, or lower part, and a second part 53, in the following called also upper closing part.
  • the lower part 52 and the upper closing part 53 are preferably substantially cylindrically shaped.
  • the lower part 52 and the upper closing part 53 may have different shapes, for example they may be prismatic, parallelepiped, etc.
  • the air chamber 51 advantageously communicates at one side with the discharge outlet 26 of the tub 3 and on another side with the pressure sensor 50.
  • the lower part 52 of the air chamber 51 communicates with the discharge outlet 26 of the tub 3 through a chamber inlet 58.
  • the upper closing part 53 communicates with the pressure sensor 50 through a chamber outlet 59, and preferably a conduit 54, preferably narrow.
  • the air chamber 51 advantageously communicates with the discharge outlet 26 through the drain hose 70 arranged below the discharge outlet 26.
  • the drain hose 70 preferably comprises a first portion 71 connectable to the tub 3 at the discharge outlet 26 and a second portion 72 for conveying liquid to the outside and/or, if a recirculation circuit is provided, again inside the tub 3.
  • the second portion 72 comprises a flexible plastic tubing.
  • a fastening device 80 is preferably provided for connecting the first portion 71 of the drain hose 70 to the tub 3.
  • the fastening device 80 comprises a clamp, not illustrated.
  • the fastening device may be of different type.
  • a snap connection may be provided for the connection of the drain hose to the tub, or other elements like screws, etc..
  • a gasket may be advantageously interposed between the first portion 71 and the tub 3 in order to improve tight connection.
  • a draining pump is connected, not shown, allows withdrawing of the liquid from the tub 3 through the drain hose 70.
  • the drain hose 70 defines a liquid conveying element.
  • the lower part 52 of the air chamber 51 is obtained in a single piece construction with the drain hose 70.
  • the drain hose 70 and the lower part 52 of the air chamber 51 are preferably made with a plastic material (preferably a resilient material, so that the drain hose 70 acts also as a sealing providing also its watertight connection with the tub 3) and are preferably obtained in a single piece construction by moulding, more preferably by injection moulding.
  • the drain hose 70 and the lower part 52 of the air chamber 51 therefore define a completed, integral, unitary member.
  • the upper closing part 53 of the air chamber 51 is obtained in a single piece construction with the tub 3.
  • the upper closing part 53 of the air chamber 51 is obtained in a single piece construction with the rear hemi-shell 14 of tub 3.
  • the upper closing part 53 of the air chamber 51 could be obtained in a single piece construction with the front hemi-shell 13 of tub 3.
  • the upper closing part 53 of the air chamber 51 may be obtained partially in a single piece construction with the rear hemi-shell 14 and partially in a single piece construction with the front hemi-shell 13 of tub 3, in such a way that when the first and second hemi-shells are assembled one another for forming the tub 3, also the upper closing part 53 of the air chamber 51 is assembled; also this advantageous embodiment is enclosed in the definition of an upper closing part 53 of the air chamber 51 obtained in a single piece construction with the tub 3.
  • the second part 53 comprises a wall 53a which surrounds a longitudinal axis Y2 of the second part 53, passing preferably through the centre of the second part 53, as illustrated in Figure 5 .
  • the second part 53 comprises a wall 53a which is substantially parallel to the longitudinal axis Y2.
  • the collar portion 27 is, therefore, preferably cylindrically or prismatic or parallelepiped shaped.
  • the second part 53 may comprise a wall differently shaped, for example shaped like a bell, and suitable to be realized by injection moulding with simple steps.
  • the tub 3 and the upper closing part 53 of the air chamber 51 are preferably made with a plastic material and are preferably obtained by moulding, more preferably by injection moulding.
  • the longitudinal axis Y1 of the collar portion 27 is parallel to the longitudinal axis Y2 passing through the centre of the second part 53 of the air chamber 51.
  • moulding process of the tub 3 and upper closing part 53 is simplified.
  • the collar portion 27 and the second part 53 may be obtained by a single slide (i.e. the moving part of the moulding device used for obtaining hollow elements transversal with respect of the main closing direction of the mould) of the moulding device adapted to be moved, during the moulding procedure, in a direction parallel to longitudinal axis Y1 and Y2; using such a single slider allows keeping the costs for the moulding device low.
  • the tub 3 and the upper closing part 53 are preferably connected through a connecting element 57 preferably a rib, as better visible in Figures 5 and 7 , made in a single piece construction with the tub 3 and the upper closing part 53, and which preferably extends along substantially all the entire length of the upper closing part 53.
  • the shape and the extent of the connecting element 57 may be different.
  • the connecting element may comprise apertures which reduce the weight of the connecting element itself.
  • the upper closing part 53 fits on the lower part 52 thus forming the air chamber 51.
  • a gasket may be advantageously interposed between the upper closing part 53 and the lower part 52 in order to guarantee a tight connection.
  • the realization of the lower part 52 of the air chamber 51 as a part of the drain hose 70 allows the detection of very low level L of the liquid inside the tub 3, preferably also a level at which the tub 3 is substantially empty, or even a level at which the tub 3 is completely empty.
  • the drain hose 70 is advantageously arranged below the discharge outlet 26. More advantageously, this is due to the fact that the chamber inlet 58 is arranged below the discharge outlet 26.
  • the upper closing part 53 of the air chamber 51 and the tub 3 define a complete, integral, unitary member. Installation of the air chamber 51 is therefore simplified since the use of fastening elements, like clamps or iron wires, to fix to the upper closing part 53 to the washing tub 3 is completely avoided.
  • the reliability of the laundry washing machine is therefore increased compared to the machines of known type.
  • This laundry washing machine differs from the above described laundry washing machine 1 for the different realization of the water outlet circuit 125 and of the air chamber 151.
  • the water outlet circuit 125 preferably comprises an integrated drain pump 170 arranged below the discharge output 26.
  • the air chamber 151 preferably comprises a lower part 152 and an upper closing part 53.
  • the upper closing part 53 is identical to the upper closing part previously described with reference to the first preferred embodiment.
  • the lower part 152 and the upper closing part 53 are preferably substantially cylindrical or prismatic or parallelepiped shaped.
  • the air chamber 151 communicates at one side with the discharge outlet 26 of the tub 3 and on another side with the pressure sensor 50.
  • the lower part 152 of the air chamber 151 communicates with the discharge outlet 26 of the tub 3 through a chamber inlet 158.
  • the upper closing part 53 communicates with the pressure sensor 50 through a chamber outlet 59 and narrow conduit 54, as above described.
  • the chamber inlet 158 is advantageously arranged below the discharge outlet 26. As for the first embodiment, this arrangement allows the detection of very low level L of the liquid inside the tub 3, preferably also a level at which the tub 3 is substantially empty, or even a level at which the tub 3 is completely empty.
  • the air chamber 151 advantageously communicates with the discharge outlet 26 through the integrated drain pump 170 arranged below the discharge outlet 26.
  • the integrated drain pump 170 preferably comprises a first portion 171 connectable to the tub 3 at the discharge outlet 26 and a second portion 172 for conveying liquid to the outside, or again inside the tub 3 if a recirculation circuit is provided.
  • the second portion 172 comprises a plastic duct portion.
  • a fastening device 180 is preferably provided for connecting the first portion 171 of the integrated drain pump 170 to the tub 3.
  • the fastening device 180 comprises screws, not visible, which engage with respective seats 180a, 181a, 180b, 181b of the tub 3 and of the first portion 171.
  • the fastening device may be of different type.
  • a snap connection may be provided for the connection of the drain hose to the tub, or other elements like clamps, etc..
  • the first portion 171 of the integrated drain pump 170 is fixed to the tub 3 by welding.
  • a gasket may be advantageously interposed between the first portion 171 and the tub 3 in order to guarantee a tight connection.
  • a draining pump 173 allows withdrawing of the liquid from the tub 3.
  • the first portion 171, the second portion 172 and the draining pump 173 form the integrated drain pump 170.
  • the first portion 171 and the second portion 172 eventually define a liquid conveying element.
  • the lower part 152 of the air chamber 151 is obtained in a single piece construction with the integrated drain pump 170.
  • the lower part 152 of the air chamber 151 is obtained in a single piece construction with the first portion 171 and the second portion 172 of the integrated drain pump 170.
  • the first portion 171, the second portion 172 and the lower part 152 of the air chamber 151 are preferably made with a plastic material and are preferably obtained, preferably in a single step, by moulding, more preferably by injection moulding.
  • the first portion 171, the second portion 172 and the lower part 152 of the air chamber 151 therefore define a completed, integral, unitary member.
  • the same advantages above described for the previous embodiment may therefore be achieved.
  • the upper closing part 53 of the air chamber 151 is obtained in a single piece construction with the tub 3.
  • the upper closing part 53 is identical to the upper closing part previously described with reference to the first preferred embodiment described with reference to Figures 1 to 7 .
  • the upper closing part 53 fits on the lower part 152 thus forming the air chamber 151.
  • the same tub 3 may be used to assemble either a first type of laundry washing machine 1 having a drain hose arrangement 70 or a second type of laundry washing machine having an integrated drain pump arrangement 170.
  • the provision of the upper closing part 53 of the air chamber 51, 151 obtained in a single piece construction with the tub 3 advantageously allows the assemblage of different types of laundry washing machines using the same type of washing tub 3 and different types of liquid conveying portions.
  • the production and design costs may therefore be reduced compared to known technique.
  • the present invention allows all the set objects to be achieved.
  • it makes it possible to obtain an improved liquid level sensing device arrangement in a laundry washing machine with respect to the machines of the prior art and to reduce manufacturing and/or assembling time and costs.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP12199173.1A 2012-12-21 2012-12-21 Machine à laver le linge Withdrawn EP2746450A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12199173.1A EP2746450A1 (fr) 2012-12-21 2012-12-21 Machine à laver le linge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12199173.1A EP2746450A1 (fr) 2012-12-21 2012-12-21 Machine à laver le linge

Publications (1)

Publication Number Publication Date
EP2746450A1 true EP2746450A1 (fr) 2014-06-25

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Family Applications (1)

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EP12199173.1A Withdrawn EP2746450A1 (fr) 2012-12-21 2012-12-21 Machine à laver le linge

Country Status (1)

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EP (1) EP2746450A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105019187A (zh) * 2015-07-27 2015-11-04 江苏海狮机械集团有限公司 洗脱机内胆中的落料装置
CN110565319A (zh) * 2019-09-10 2019-12-13 无锡小天鹅电器有限公司 衣物处理设备
EP3936655A1 (fr) * 2020-07-10 2022-01-12 Electrolux Appliances Aktiebolag Machine à laver le linge comprennant un puisard de la cuve de lavage dotée d'un circuit de recirculation et un capteur de niveau
US12031256B2 (en) 2019-09-10 2024-07-09 Wuxi Little Swan Electric Co., Ltd Clothes treatment apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590918A1 (fr) * 1985-12-03 1987-06-05 Ciapem Machine a laver a cuve en matiere synthetique
EP0247918A1 (fr) * 1986-05-27 1987-12-02 Ciapem Cuve à chambre intégrée de compression
DE102004057943B3 (de) * 2004-11-30 2005-12-08 Miele & Cie. Kg Kunststofflaugenbehälter für eine Waschmaschine
CN201598461U (zh) 2009-12-07 2010-10-06 无锡小天鹅股份有限公司 高效安装气室的固定装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590918A1 (fr) * 1985-12-03 1987-06-05 Ciapem Machine a laver a cuve en matiere synthetique
EP0247918A1 (fr) * 1986-05-27 1987-12-02 Ciapem Cuve à chambre intégrée de compression
DE102004057943B3 (de) * 2004-11-30 2005-12-08 Miele & Cie. Kg Kunststofflaugenbehälter für eine Waschmaschine
CN201598461U (zh) 2009-12-07 2010-10-06 无锡小天鹅股份有限公司 高效安装气室的固定装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105019187A (zh) * 2015-07-27 2015-11-04 江苏海狮机械集团有限公司 洗脱机内胆中的落料装置
CN105019187B (zh) * 2015-07-27 2017-03-01 江苏海狮机械集团有限公司 洗脱机内胆中的落料装置
CN110565319A (zh) * 2019-09-10 2019-12-13 无锡小天鹅电器有限公司 衣物处理设备
US12031256B2 (en) 2019-09-10 2024-07-09 Wuxi Little Swan Electric Co., Ltd Clothes treatment apparatus
EP3936655A1 (fr) * 2020-07-10 2022-01-12 Electrolux Appliances Aktiebolag Machine à laver le linge comprennant un puisard de la cuve de lavage dotée d'un circuit de recirculation et un capteur de niveau
US11530507B2 (en) 2020-07-10 2022-12-20 Electrolux Appliances Aktiebolag Laundry washing machine

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