Laundry washing machine

• US 9,970,147 B2
• Filed: 02/06/2013
• Issued: 05/15/2018
• Est. Priority Date: 02/06/2013
• Status: Active Grant

• Current Assignee: Electrolux Appliances Aktiebolag (AB Electrolux)
• Original Assignee: Electrolux Appliances Aktiebolag (AB Electrolux)
• Inventors: Del Pos, Maurizio, Favaro, Daniele
• Primary Examiner(s): Cormier, David G
• Assistant Examiner(s): Bucci, Thomas
• Application Number:
  US14/765,977
• Publication Number:
  US 20150368846A1
• Time in Patent Office: 1,924 Days
• Field of Search: 68 13 A, 68 17 R, 68 1218, 68207, 68 13 R, 68200, 68 235, 134 57 D, 134 58 D, 134115 R, 134 93, 134109, 134 56 D, 134 18, 134 26, 134 29, 134 36, 134 7, 210190, 210191, 210136, 210140, 210141, 210687, 21016701, 222651, 222129, 222325, 222 1, 222132, 2221455, 22218911, 222318
• CPC Class Codes: D06F 39/007 Arrangements of water softeners
• CPC Class Codes: D06F 39/02 Devices for adding soap or other washing agents
• CPC Class Codes: D06F 39/028 Arrangements for selectively supplying water to detergent compartments
• CPC Class Codes: D06F 39/088 Liquid supply arrangements

Abstract

Laundry machine has a detergent dispensing assembly, a fresh-water supply circuit for selectively channeling a fresh water flow towards the detergent dispensing assembly, and a water softening device including a softening container having softening agent along the fresh-water supply circuit. A regeneration-agent reservoir fluidically connected to the softening container receives a regeneration agent. A water supply circuit channels fresh water into the regeneration-agent reservoir. The softening device includes an automatic one-way valve on a first fresh-water supply line upstream of the softening container, allowing water to only flow along the first fresh-water supply line, from a water mains to the softener container. An electrically-controlled valve assembly/flow diverter, located along the first fresh-water supply line, downstream of the one-way valve and upstream of the softening container, selectively allows/prevents the water to freely flow towards, respectively, the softening container and the softening device water supply circuit.

Claims

1. A laundry washing machine comprising an outer casing and, inside said outer casing, a control unit, a washing tub, a rotatable drum housed in axially rotatable manner inside the washing tub and structured for housing laundry to be washed, a detergent dispensing assembly which is structured for supplying detergent, softener or other washing agent into the washing tub, a fresh-water supply circuit which is structured for selectively channeling a flow of fresh water from a water mains towards the detergent dispensing assembly and/or the washing tub, and a water softening device which is arranged/located along the fresh-water supply circuit and is structured for reducing the hardness degree of the fresh water channeled to the detergent dispensing assembly and/or the washing tub;

the fresh-water supply circuit comprising at least a first fresh-water supply line which is connected to the water mains and is structured for selectively conveying into the washing tub the detergent, softener or other washing agent of the detergent dispensing assembly; and

the water softening device in turn comprising a water-softening agent container which is arranged/located along said first fresh-water supply line and is filled with a water softening agent able to reduce the hardness degree of the fresh water flowing through the same water-softening agent container;

a regeneration-agent reservoir which is fluidically connected to the water-softening agent container and is structured to receive a consumable regeneration agent for performing a regeneration of the water softening function of the water softening agent stored into the water-softening agent container; and

a water supply circuit which is structured for channeling fresh water into the regeneration-agent reservoir so to at least partly dissolve the regeneration agents stored therein and form brine;

wherein the water softening device further comprises;

a passive one-way valve not controllable by the control unit, arranged along the first fresh-water supply line upstream of the water-softening agent container, and structured so as to allow the fresh water to only flow along the first fresh-water supply line, from the water mains to the water-softening agent container and not vice versa; and

an electrically-controlled valve assembly or flow diverter which is located along the first fresh-water supply line, downstream of the passive one-way valve and upstream of the water-softening agent container, and structured for selectively allowing or preventing the fresh water of the water mains to freely flow towards, respectively, the water-softening agent container and the water supply circuit of the water softening device;

wherein the detergent dispensing assembly comprises a number of washing-agent containers each of which is manually fillable with a given quantity of detergent, softener or other washing agent, and in that the first fresh-water supply line is structured for selectively channelling the fresh water from the water mains directly to a washing-agent container of the detergent dispensing assembly structured to contain the detergent or other washing agent to be used in a main-wash phase of a washing cycle;

wherein the fresh-water supply circuit comprises further independent fresh-water supply lines each of which is independently connected to the water mains and is structured for selectively and independently channeling fresh water from the water mains to a respective remaining washing-agent container of the detergent dispensing assembly.

2. The laundry washing machine according to claim 1, wherein the water softening device further comprises a water by-pass circuit which branches off from the first fresh-water supply line upstream of the water-softening agent container, and is structured for selectively channeling, directly towards the detergent dispensing assembly, the fresh water that flows along the first fresh-water supply line towards the water-softening agent container, so as to bypass the water-softening agent container;

the water by-pass circuit being connected to the electrically-controlled valve assembly or flow diverter, said electrically-controlled valve assembly or flow diverter being structured for selectively allowing or preventing the fresh water of the water mains to flow also towards said water by-pass circuit.

3. The laundry washing machine according to claim 2, wherein the first fresh-water supply line is structured for connecting the water mains to a washing-agent container of the detergent dispensing assembly, so as to selectively flush/push into the washing tub the detergent, softener or other washing agent contained in said washing-agent container;

and in that the water by-pass circuit is structured for selectively channeling the fresh water that flows along the first fresh-water supply line, directly towards the washing-agent container of the detergent dispensing assembly connected to the first fresh-water supply line, bypassing the water-softening agent container.

4. The laundry washing machine according to claim 1, wherein the water softening device further comprises an electrically-powered brine-circulating pump assembly or valve assembly which is interposed between the water-softening agent container and the regeneration-agent reservoir and is structured for regulating/controlling an outflow of the brine from the regeneration-agent reservoir to the water-softening agent container.

5. The laundry washing machine according to claim 1, wherein the water softening device further comprises a water drain line which is structured for selectively channeling/rerouting the brine or fresh water that comes out from the water-softening agent container, directly into the washing tub or into a waste-water drain line that channels the waste water or washing liquor out of the laundry washing machine, so to bypass the detergent dispensing assembly.

6. The laundry washing machine according to claim 1, wherein said first fresh-water supply line comprises a first pipeline or the like which connects the water mains to an inlet of the water-softening agent container, a second pipeline or the like which connects an outlet of the water-softening agent container to the detergent dispensing assembly, and an electrically-controlled on-off valve which is located along the first pipeline or the like so as to be able to control/regulate the flow of fresh water from the water mains to the detergent dispensing assembly and the water-softening agent container;

an automatic one-way valve and the electrically-controlled valve assembly or flow diverter being located downstream of the electrically-controlled on-off valve of the first fresh-water supply line.

7. The laundry washing machine according to claim 1, wherein each further independent fresh-water supply line comprises a connecting pipeline which directly connects the water mains to a corresponding washing-agent container of the detergent dispensing assembly;

and an electrically-controlled on-off valve which is located along said connecting pipeline so as to be able to regulate the flow of fresh water from the water mains to said washing-agent container of the detergent dispensing assembly.

8. The laundry washing machine according to claim 1, wherein each washing-agent container of the detergent dispensing assembly is provided with a corresponding loading inlet which is exposed or exposable to outside of the casing on a front wall of the casing, and is structured for allowing the user to load the requested detergent, softener and/or other washing agent into the same washing-agent container;

and in that the regeneration-agent reservoir, in turn, is provided with a corresponding loading inlet or mouth which is exposed or exposable to the outside of the casing on the front wall of the casing, beside the exposed or exposable loading inlet of each washing-agent container of the detergent dispensing assembly, and is structured for allowing the user to load consumable salt or other regeneration agent inside the same regeneration-agent reservoir.

9. The laundry washing machine according to claim 1, further comprising an appliance control panel which is structured for allowing the user to manually select a desired washing cycle between washing cycles that use non-softened fresh water during a main-wash phase of the washing cycle, and washing cycles that use softened fresh water during a main-wash phase of the washing cycle.

10. The laundry washing machine according to claim 8, wherein the regeneration-agent reservoir is recessed/incorporated into a drawer-like supporting structure which is fitted/inserted in manually extractable manner into a corresponding drawer housing which extends inside the casing and communicates with the outside of the casing via a front entrance or opening realized on the same front wall of casing;

said drawer-like supporting structure being movable between a retracted position in which the drawer-like supporting structure is completely recessed/inserted into the drawer housing, so as to place the loading inlet of the regeneration-agent reservoir completely inside the casing, and an extracted position in which the drawer-like supporting structure partly juts out from the front wall of the casing so as to place the loading inlet of the regeneration-agent reservoir outside of the casing.

11. The laundry washing machine according to claim 10, wherein the regeneration-agent reservoir is recessed/incorporated into the drawer-like supporting structure in a manually removable manner.

12. The laundry washing machine according to claim 9, wherein the appliance control panel is located on a front wall of the casing so to be substantially vertically aligned to a laundry loading/unloading opening realized on the same front wall of the casing;

and in that an exposed or exposable loading inlet of each washing-agent container of the detergent dispensing assembly and an exposed or exposable loading inlet of the regeneration-agent reservoir are arranged on the front wall of the casing on opposite sides of the appliance control panel.

13. The laundry washing machine according to claim 10, wherein an appliance control panel is located on a front side of the drawer-like supporting structure carrying the regeneration-agent reservoir.

14. The laundry washing machine according to claim 1, wherein the regeneration-agent reservoir is provided with a loading inlet which is exposed or exposable to outside of the casing on a worktop of the casing.

15. The laundry washing machine according to claim 1, wherein the regeneration-agent reservoir comprises a substantially basin-shaped regeneration-agent container which is manually fillable with a given quantity of consumable salt or other regeneration agent, and is located/recessed into the casing so an upper mouth of the basin-shaped container is freely accessible by the user.

16. The laundry washing machine according to claim 1, wherein the regeneration-agent reservoir comprises a storage tank which is structured for being manually fillable with a given quantity of consumable salt or other regeneration agent, and a manually-removable cap which is structured to close the storage tank.

17. The laundry washing machine according to claim 16, wherein the regeneration-agent reservoir furthermore comprises an overflow drain line which is structured for directly channeling water or brine exceeding the maximum capacity of the storage tank towards the washing tub or towards a waste-water drain line that channels waste water or washing liquor out of the laundry washing machine.