Pump and dishwasher including the same

Patent metadata

Field	Value
Publication number	US-12016507-B2
Application number	US-202318195820-A
Country	US
Kind code	B2
Filing date	May 10, 2023
Priority date	Aug 22, 2014
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A pump (8) is disclosed. The pump (8) includes a partition wall (84) configured to divide the interior of a body into two spaces, a first chamber (C1) located under the partition wall (84), the first chamber (C1) having an introduction portion (841), through which water is introduced, a second chamber (C2) located above the partition wall (84), the second chamber (C2) having a discharge portion (849), through which water is discharged, a communication hole (86) formed through the partition wall (84) to allow the first chamber (C1) and the second chamber (C2) to communicate with each other therethrough, an impeller (85) provided in the second chamber (C2) to move water to the discharge portion (849), a housing configured to define the bottom surface of the first chamber (C1), the housing being made of a conductor, a heater (H) configured to heat the housing (81), and a steam discharge (843) port formed through the first chamber (C1) to allow steam to be discharged therethrough.

First claim

The invention claimed is:

1. A pump comprising:
a body;
a partition wall configured to divide an interior of the body into two spaces;
a first chamber located under the partition wall, the first chamber having an introduction portion, through which water is introduced;
a second chamber located above the partition wall, the second chamber having a discharge portion, through which water is discharged;
a communication hole formed through the partition wall to allow the first chamber and the second chamber to communicate with each other therethrough;
an impeller provided in the second chamber to move water to the discharge portion;
a housing configured to define a bottom surface of the first chamber, the housing being made of a conductor;
a heater configured to heat the housing; and
a fastening portion configured to fix the edge of the housing with the body.

2. The pump according to claim 1 , further comprises a support portion that is provided at a circumferential surface of the body,
wherein the fastening portion is configured to fix the edge of the housing with the support body.

3. The pump according to claim 2 , wherein the fastening portion comprises:
a first extension portion extending from the edge of the housing to wrap the bottom surface of the support portion;
a second extension portion extending from the edge of the first extension portion to wrap the side surface of the support portion; and
third extension portions extending from the edge of the second extension portion to couple the second extension portion to the upper surface of the support portion.

4. The pump according to claim 3 , further comprising:
a protrusion provided at the support portion and a protrusion receiving recess provided in the second extension portion to receive the protrusion.

5. The pump according to claim 4 , wherein the protrusion extends in a height direction of the body, and the protrusion receiving recess has a width equal to the distance between one of the third extension portions and another of the third extension portions.

6. The pump according to claim 3 , further comprising:
a steam discharge port formed through the first chamber to allow steam to be discharged therethrough; and
a guide configured to divide an inner space of the first chamber into a first area, in which the steam discharge port is located, and a second area, in which the steam discharge port is not located, based on a water level in the first chamber.

7. The pump according to claim 6 , wherein the first area has a larger volume than the second area.

8. The pump according to claim 6 , wherein the heater is configured such that an amount of heat generated by a part of the heater configured to heat a liquid in the first area is greater than an amount of heat generated by a part of the heater configured to heat a liquid in the second area.

9. The pump according to claim 6 , wherein the guide protrudes from the partition wall toward the housing such that a free end of the guide does not contact the housing.

10. The pump according to claim 6 , wherein the guide comprises:
a base located in the first area to surround a part of an outer circumferential surface of the communication hole;
a first plate connected between one end of the base and an inner circumferential surface of the first chamber to divide the first area and the second area from each other; and
a second plate connected between the other end of the base and the inner circumferential surface of the first chamber to divide the first area and the second area from each other.

11. The pump according to claim 10 , wherein the introduction portion is located in the first area.

12. A dishwasher comprising:
a tub configured to receive objects to be washed;
a spray arm configured to spray wash water to the objects to be washed;
a steam supply unit configured to supply steam to the tub;
a sump configured to store wash water; and
a pump configured to supply the wash water stored in the sump to the spray arm,
wherein the pump comprises:
a body;
a partition wall configured to divide an interior of the body into two spaces;
a first chamber located under the partition wall, the first chamber having an introduction portion communicating with the sump;
a second chamber located above the partition wall, the second chamber having a discharge portion communicating with the spray arm;
a communication hole formed through the partition wall to allow the first chamber and the second chamber to communicate with each other therethrough;
an impeller provided in the second chamber to move water to the discharge portion;
a housing configured to define a bottom surface of the first chamber, the housing being made of a conductor;
a heater configured to heat the housing;
a steam discharge port formed through the first chamber to allow the first chamber and the steam supply unit to communicate with each other; and
a fastening portion configured to fix the edge of the housing with the body.

13. The dishwasher according to claim 12 , further comprises a support portion that is provided at a circumferential surface of the body, wherein the fastening portion is configured to fix the edge of the housing with the support body.

14. The dishwasher according to claim 13 , wherein the fastening portion comprises:
a first extension portion extending from the edge of the housing to wrap the bottom surface of the support portion;
a second extension portion extending from the edge of the first extension portion to wrap the side surface of the support portion; and
third extension portions extending from the edge of the second extension portion to couple the second extension portion to the upper surface of the support portion.

15. The dishwasher according to claim 14 , further comprising:
a protrusion provided at the support portion and a protrusion receiving recess provided in the second extension portion to receive the protrusion.

Assignees

• Lg Electronics Inc

Inventors

• Lee Sangsoo
• Kim Myoungjong
• Lee Jongmin
• Choi Yongjin
• Kim Minchul
• Park Jinseok
• Eo Soohan
• Jang Semin
• An Seongwoo

Classifications

• F04D13/00

  Pumping installations or systems (controlling F04D15/00) · CPC title

• A47L15/08

  by application of a pressure effect produced by pumps · CPC title

• A47L15/00 Primary

  Washing or rinsing machines for crockery or tableware · CPC title

• F04D29/586

  specially adapted for liquid pumps · CPC title

• F04D29/4273

  suction eyes · CPC title