Laundry washing machine

• US 9,777,426 B2
• Filed: 08/09/2013
• Issued: 10/03/2017
• 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): Perrin, Joseph L
• Application Number:
  US14/424,887
• Publication Number:
  US 20150211171A1
• Time in Patent Office: 1,516 Days
• CPC Class Codes: D06F 39/04 Heating arrangements
• CPC Class Codes: D06F 39/083 Liquid discharge or recirculation arrangements
• CPC Class Codes: D06F 39/088 Liquid supply arrangements

Abstract

A laundry washing machine (1) 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 heater device (10) placed at the bottom (3a) of the washing tub (3) for heating a liquid coming into contact with it and a liquid output (37) placed at the bottom (3a) of the washing tub (3) for introducing liquid into the washing tub (3). The liquid output (37) is arranged in such a way to emit a jet of said liquid below the heater device (10), the jet having a main flowing direction (L) substantially parallel or pointed to the bottom (3a) of the washing tub (3), so as to remove washing/rinsing products collected therein.

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 heater device placed at a bottom of said washing tub configured to heat a liquid coming into contact with the heater device; and

a liquid output placed at said bottom of said washing tub below the heater device and configured to introduce liquid into said washing tub;

wherein said liquid output is configured to emit a jet of said liquid below the heater device, said jet having a main flowing direction substantially parallel or pointed to said bottom of said washing tub, so as to remove washing/rinsing products collected therein.

2. The laundry washing machine according to claim 1, wherein said liquid output is defined in a terminal portion of a pipe.

3. The laundry washing machine according to claim 2, wherein said terminal portion is arranged such that a speed of the liquid at said liquid output is greater than a speed of the liquid at any other points inside said terminal portion.

4. The laundry washing machine according to claim 3, further comprising a recirculation circuit configured to withdraw liquid from said washing tub, said recirculation circuit having a recirculation pipe comprising said terminal portion provided with said liquid output.

5. The laundry washing machine according to claim 2, wherein:

said terminal portion comprises an end portion,

said liquid output being defined in said end portion, and

said end portion having an internal cross sectional area decreasing in the direction of said liquid output.

6. The laundry washing machine according to claim 5, wherein said end portion comprises a conical-shaped duct or a pyramidal-shaped duct.

7. The laundry washing machine according to claim 5, wherein said terminal portion further comprises a tubular portion adjacent to said end portion.

8. The laundry washing machine according to claim 2, wherein said terminal portion further comprises a tubular portion.

9. The laundry washing machine according to claim 8, wherein said tubular portion extends along an axis which is parallel to said main flowing direction.

10. The laundry washing machine according to claim 2, further comprising a further water supply circuit configured to convey liquid into said washing tub, said further water supply circuit having a pipe connected to said terminal portion provided with said liquid output.

11. The laundry washing machine according to claim 1, wherein said liquid output is circular or rectangular.

12. The laundry washing machine according to claim 1, wherein said washing tub comprises a seat configured to receive said heater device, said main flowing direction of said emitted jet of liquid being substantially parallel or pointed to said bottom of said seat.

13. The laundry washing machine according to claim 1, wherein said main flowing direction does not intersect said heater device.

14. The laundry washing machine according to claim 1, further comprising a further recirculation circuit configured to withdraw liquid from said washing tub and to re-admit liquid into an upper region of said washing tub.

15. The laundry washing machine according to claim 1, wherein said machine is a laundry washing-drying machine.

16. 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 heater device placed at a bottom of said washing tub configured to heat liquid coming into contact with the heater device; and

a recirculation circuit configured to withdraw liquid from said washing tub, said recirculation circuit comprising;

a recirculation pipe having a terminal portion; and

a liquid output at the terminal portion of the recirculation pipe and placed at the bottom of the washing tub, the liquid output being configured to introduce liquid from the recirculation pipe into said washing tub;

wherein the liquid output is configured to emit a jet of liquid below the heater device, the jet having a main flowing direction substantially parallel or pointed to said bottom of said washing tub, so as to remove washing/rinsing products collected therein.