Laundry washing machine

• US 9,903,065 B2
• Filed: 08/09/2013
• Issued: 02/27/2018
• Est. Priority Date: 08/29/2012
• Status: Active Grant

• Current Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Original Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Inventors: Favaro, Daniele, Pesavento, Elena, Stabon, Elisa, Pos, Maurizio Del
• Primary Examiner(s): Barr, Michael
• Assistant Examiner(s): OSTERHOUT, BENJAMIN LEE
• Application Number:
  US14/424,853
• Publication Number:
  US 20150240408A1
• Time in Patent Office: 1,663 Days
• CPC Class Codes: D06F 39/083 Liquid discharge or recirculation arrangements
• CPC Class Codes: D06F 39/085 Arrangements or adaptations of pumps
• CPC Class Codes: D06F 39/10 Filtering arrangements

Abstract

A laundry washing machine includes a washing tub (3) external to a rotatable washing drum (4) adapted to receive laundry. The machine further includes a water supply circuit (5) to supply water into the washing tub (3), a washing/rinsing products supplier (6) to supply washing/rinsing products into the washing tub (3), a liquid outlet circuit (25) suitable for withdrawing liquid from the washing tub (3) and conveying such a liquid to the outside. The machine further includes a first recirculation circuit (20) suitable for withdrawing liquid from the washing tub (3) and re-admitting such a liquid into a first region (3b) of said washing tub (3), wherein the first recirculation circuit (20) includes a first recirculation pump (21) suitable for forcing liquid inside the first recirculation circuit (20) and a second recirculation circuit (30) suitable for withdrawing liquid from the washing tub (3) and re-admitting such a liquid into a second region (3c) of the washing tub (3). The second recirculation circuit (30) includes a second recirculation pump (31) suitable for forcing liquid inside the second recirculation circuit (30).

Claims

1. A laundry washing machine comprising:

a washing tub external to a rotatable washing drum adapted to receive laundry;

a water supply circuit configured to supply water into said washing tub;

a washing/rinsing products supplier configured to supply washing/rinsing products into said washing tub;

a liquid outlet circuit configured to withdraw liquid from said washing tub and to convey liquid to an outlet;

a first recirculation circuit configured to withdraw liquid from said washing tub and to re-admit liquid into a first region of said washing tub, said first recirculation circuit comprising a first recirculation pump configured to force liquid inside said first recirculation circuit directly from said washing tub; and

a second recirculation circuit configured to withdraw liquid from said washing tub and to re-admit liquid into a second region of said washing tub, said second region being a lower portion of said washing tub,

wherein said second recirculation circuit comprises a second recirculation pump configured to force liquid inside said second recirculation circuit directly from said washing tub and to re-admit said liquid into said second region, and said second recirculation circuit is configured to mix said liquid with washing/rinsing products accumulated in said second region.

2. A machine according to claim 1, further comprising a first filtering device fluidly connected to an outlet of said washing tub, wherein said first recirculation pump is connected to a first outlet of said first filtering device and said second recirculation pump is connected to a second outlet of said filtering device.

3. A machine according to claim 2, wherein said first outlet of said filtering device and said second outlet of said filtering device are arranged at opposite sides with respect a central plane intersecting said first filtering device.

4. A machine according to claim 2, wherein said liquid outlet circuit comprises a draining pump, said draining pump being connected downstream of said first filtering device.

5. A machine according to claim 2, wherein said liquid outlet circuit comprises a draining pump, said draining pump being connected downstream of a second filtering device.

6. A machine according to claim 1, wherein said first region of said washing tub is a higher region with respect to said second region of said washing tub.

7. A machine according to claim 1, wherein said first recirculation circuit is arranged such that recirculated liquid is conveyed to the laundry, so as to wet the laundry.

8. A machine according to claim 1, wherein said second recirculation circuit re-admits liquid into said second region of said washing tub so as to improve dissolution of the washing/rinsing product collected therein.

9. A machine according to claim 8, wherein said second recirculation circuit re-admits liquid into a lower seat of said washing tub which receives a heater device.

10. A machine according to claim 1, wherein said first recirculation pump and said second recirculation pump are mounted on a support body, said support body being a single piece construction.

11. A machine according to claim 10, wherein said support body comprises:

a first inlet and a first outlet for said first recirculation pump; and

a second inlet and a second outlet for said second recirculation pump.

12. A machine according to claim 1, wherein the machine is a laundry washing-drying machine.

13. A machine according to claim 1, wherein the first recirculation pump is configured to force liquid inside the first recirculation circuit separate from the second recirculation circuit, and wherein the second recirculation pump is configured to force liquid inside the second recirculation circuit separate from the first recirculation circuit.

14. A machine according to claim 1, wherein the first recirculation pump is configured to activate independently of activation of the second recirculation pump.