Laundry washing machine

• US 9,903,062 B2
• Filed: 04/23/2013
• Issued: 02/27/2018
• Est. Priority Date: 04/24/2012
• Status: Active Grant

• Current Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Original Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Inventors: Favaro, Daniele, Del Pos, Maurizio
• Primary Examiner(s): Cormier, David G
• Application Number:
  US14/397,020
• Publication Number:
  US 20150107309A1
• Time in Patent Office: 1,771 Days
• CPC Class Codes: D06F 39/007 Arrangements of water softeners
• CPC Class Codes: D06F 39/022 in a liquid state D06F39/024 takes precedence
• 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 washing machine (1) includes an outer casing (2) and, inside said casing (2), a washing tub (3). A rotatable drum arranged in an axially rotating manner inside the washing tub (3) and is structured for receiving the laundry to be washed. A detergent dispensing assembly (9) is structured for supplying detergent into the washing tub (3). A first fresh-water supply circuit (10) is structured for selectively channeling a flow of fresh water from the water mains towards the detergent dispensing assembly (9) and/or the washing tub (3). A water softening device (11) which is interposed between the first fresh-water supply circuit (10) and the detergent dispensing assembly (9) or the washing tub (3), and is structured for reducing the hardness degree of the fresh water supplied to the washing tub (3). The detergent dispensing assembly (9), includes a detergent container (16) which is provided with a number of detergent compartments (16a) each fillable with a respective detergent product, and a detergent flush circuit (18) which receives the fresh water from the water softening device (11) and is structured for selectively spilling/pouring the fresh water arriving from the water softening device (11) into any one of said detergent compartments (16a). The laundry washing machine (1) furthermore includes a second fresh-water supply circuit (44) which connects the water mains directly to the detergent flush circuit (18) of the detergent dispensing assembly (9), bypassing the water softening device (11), and which is structured so as to control/regulate the flow of fresh water from the water mains towards said detergent flush circuit (18).

Claims

1. A laundry washing machine comprising:

an outer casing;

a washing tub inside the outer casing;

a rotatable drum arranged in an axially rotating manner inside the washing tub and structured for receiving the laundry to be washed;

a detergent dispensing assembly structured for supplying detergent into the washing tub;

a first fresh-water supply circuit structured for selectively channeling a flow of fresh water from water mains towards the detergent dispensing assembly and/or the washing tub; and

a water softening device interposed between the first fresh-water supply circuit and the detergent dispensing assembly or interposed between the first fresh-water supply circuit and the washing tub, the water softening device being structured for reducing a hardness degree of fresh water supplied to the washing tub;

wherein the detergent dispensing assembly includes;

a detergent container provided with a plurality of detergent compartments each fillable with a respective detergent product;

a detergent flush circuit configured to receive the fresh water from the water softening device and structured for selectively spilling/pouring the fresh water arriving from the water softening device into any one of said plurality of detergent compartments; and

a second fresh-water supply circuit connecting the water mains to the detergent flush circuit and bypassing the water softening device, the second fresh-water supply circuit being structured to;

control/regulate the flow of fresh water from the water mains towards the detergent flush circuit so as to selectively spill/pour non-softened fresh water into any one of the plurality of detergent compartments; and

channel non-softened fresh water towards the washing tub, bypassing the plurality of detergent compartments and the water softening device,

wherein the laundry washing machine includes an electrically-controlled hydraulic distributor or similar valve assembly arranged downstream of the water softening device, and structured for selectively and alternatively channeling softened fresh water arriving from the water softening device towards the plurality of detergent compartments of the detergent container;

the second fresh-water supply circuit connecting the water mains to the electrically-controlled hydraulic distributor or similar valve assembly and bypassing the water softening device; and

wherein the second fresh-water supply circuit includes a hosepipe connecting the water mains to the electrically-controlled hydraulic distributor or similar valve assembly and bypassing the water softening device.

2. The laundry washing machine according to claim 1, wherein the detergent flush circuit is structured for spilling/pouring a shower of water droplets by gravity into the plurality of detergent compartments of the detergent container.

3. The laundry washing machine according to claim 2, wherein the detergent flush circuit of the detergent dispensing assembly comprises a sprinkler head located above the detergent container and provided with a number of shower-making portions each of which is aligned to a corresponding detergent compartment of the detergent container and is structured for feeding a shower of water droplets by gravity only into the corresponding detergent compartment, and wherein the electrically-controlled hydraulic distributor or similar valve assembly is located upstream of the sprinkler head and is structured for channeling fresh water selectively and alternatively towards the number of shower-making portions of the sprinkler head.

4. The laundry washing machine according to claim 1, wherein the electrically-controlled hydraulic distributor or similar valve assembly is a rotatable hydraulic distributor.

5. The laundry washing machine according to claim 1, wherein the second fresh-water supply circuit comprises an electrically-controlled on-off valve fluidically interposed between the water mains and an inlet of the detergent flush circuit of the detergent dispensing assembly, and able to control/regulate the flow of fresh water from the water mains towards the inlet of the detergent flush circuit.

6. The laundry washing machine according to claim 1, wherein the water softening device comprises:

a water-softening agent container crossed by fresh water arriving from the first fresh-water supply circuit and is filled with a water softening agent able to reduce the hardness degree of fresh water flowing through the water-softening agent container;

a regeneration-agent reservoir structured to receive a salt or other regeneration agent for performing a regeneration of the water softening function of the water softening agent stored in the water-softening agent container; and

a water supply circuit structured for selectively channeling a given amount of fresh water into the regeneration-agent reservoir to form brine,

wherein the water-softening agent container is interposed between the first fresh-water supply circuit and the detergent flush circuit of the detergent dispensing assembly.

7. The laundry washing machine according to claim 6, wherein the water softening device further comprises an electrically-powered brine-circulating pump assembly interposed between the water-softening agent container and the regeneration-agent reservoir and structured for moving/transferring the brine from the regeneration-agent reservoir to the water-softening agent container when activated, and for watertight sealing/isolating the regeneration-agent reservoir from the water-softening agent container when deactivated.

8. The laundry washing machine according to claim 6, wherein the water softening device further comprises a valve assembly interposed between the water-softening agent container and the regeneration-agent reservoir and structured for selectively allowing the brine to flow by gravity from the regeneration-agent reservoir to the water-softening agent container.

9. The laundry washing machine according to claim 6, wherein the regeneration-agent reservoir comprises a regeneration-agent container which is fillable with a given quantity of regeneration agents, and wherein the water supply circuit of the water softening device is structured for selectively spilling/pouring a shower of water droplets by gravity into the regeneration-agent container.

10. The laundry washing machine according to claim 9, wherein the water supply circuit of the water softening device comprises:

a sprinkler head located above the regeneration-agent container and structured for feeding a shower of water droplets by gravity into said regeneration-agent container; and

a valve assembly located upstream of said sprinkler head and structured for selectively channeling fresh water arriving from the first fresh-water supply circuit, or directly from the water mains, towards said sprinkler head.

11. The laundry washing machine according to claim 10, wherein the valve assembly of the water supply circuit of the water softening device is located downstream of the water-softening agent container so as to selectively channel towards the sprinkler head the fresh water coming out of the water-softening agent container.

12. The laundry washing machine according to claim 6, wherein the water supply circuit of the water softening device comprises a valve assembly, wherein the water supply circuit of the water softening device branches off from the electrically-controlled hydraulic distributor or similar valve assembly, and wherein the electrically-controlled hydraulic distributor or similar valve assembly incorporates the valve assembly of the water supply circuit of the water softening device.

13. The laundry washing machine according to claim 1, further comprising a first water drain line connected to the electrically-controlled hydraulic distributor and structured for channeling brine or fresh water arriving from the water softening device into the washing tub, or into a drain sump that extends downwards from a bottom of the washing tub, or into a water filtering assembly that is interposed between the drain sump of the washing tub and a suction of a water circulating pump and of a water exhaust pump of the laundry washing machine, or into the water exhaust pump.

14. The laundry washing machine according to claim 6, wherein the water softening device further comprises a second water drain line structured for selectively draining the brine or fresh water out of the water-softening agent container and channeling the brine or fresh water directly into the washing tub, or into a drain sump that extends downwards from a bottom of the washing tub, or into a water filtering assembly interposed between the drain sump of the washing tub and a suction of a water circulating pump and of a water exhaust pump of the laundry washing machine, or into the water exhaust pump.

15. The laundry washing machine according to claim 8, wherein the valve assembly comprises an electronically controlled on-off valve.

16. The laundry washing machine according to claim 8, wherein the valve assembly comprises a passive one-way valve.

17. The laundry washing machine according to claim 1, wherein the electrically-controlled hydraulic distributor or similar valve assembly comprises a plurality of electrically-controlled on-off valves interposed between the water softening device and the plurality of detergent compartments of the detergent container.

18. The laundry washing machine according to claim 1, wherein the electrically-controlled hydraulic distributor or similar valve assembly comprises a plurality of outlets, wherein the detergent flush circuit further comprises a plurality of air-break assemblies, each of the plurality of air-break assembly being located downstream of a corresponding outlet of the electrically-controlled hydraulic distributor or similar valve assembly and upstream of a corresponding detergent compartment of the detergent container.