Pump and dishwasher including the same

Patent metadata

Field	Value
Publication number	US-10653290-B2
Application number	US-201916449887-A
Country	US
Kind code	B2
Filing date	Jun 24, 2019
Priority date	Aug 22, 2014
Publication date	May 19, 2020
Grant date	May 19, 2020

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 (C 1 ) located under the partition wall ( 84 ), the first chamber (C 1 ) having an introduction portion ( 841 ), through which water is introduced, a second chamber (C 2 ) located above the partition wall ( 84 ), the second chamber (C 2 ) 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 (C 1 ) and the second chamber (C 2 ) to communicate with each other therethrough, an impeller ( 85 ) provided in the second chamber (C 2 ) to move water to the discharge portion ( 849 ), a housing configured to define the bottom surface of the first chamber (C 1 ), 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 (C 1 ) to allow steam to be discharged therethrough.

First claim

The invention claimed is:

1. 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 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 wash water to the discharge portion;
a housing configured to define a bottom surface of the first chamber, the housing being made of a conductor; and
a heater configured to heat the housing.

2. The dishwasher according to claim 1 , further comprising a guide that protrudes from the partition wall toward the housing such that a free end of the guide does not contact the housing,
wherein the guide is configured to divide an inner space of the first chamber into a first area, in which the introduction portion is not located, and a second area, in which the introduction portion is located, based on a water level in the first chamber.

3. The dishwasher according to claim 2 , wherein the first area has a larger volume than the second area.

4. The dishwasher according to claim 2 , wherein a length of a part of the heater located in the first area is longer than a length of a part of the heater located in the second area.

5. The dishwasher according to claim 2 , 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.

6. The dishwasher according to claim 2 , wherein the guide comprises:
a first base located in the second area to surround a part of an outer circumferential surface of the communication hole;
a first plate connected between one end of the first 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 first base and the inner circumferential surface of the first chamber to divide the first area and the second area from each other.

7. The dishwasher according to claim 2 , wherein the housing is detachably mounted to the body.

8. The dishwasher according to claim 1 , wherein the heater, the housing, the first chamber, and the second chamber are sequentially stacked in a height direction of the body such that the heater, the housing, the first chamber, and the second chamber are arranged vertically.

Assignees

• Lg Electronics Inc

Inventors

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

Classifications

• A47L15/4234

  Steam generating arrangements · CPC title

• F04D29/4273

  suction eyes · CPC title

• A47L15/4225 Primary

  Arrangements or adaption of recirculation or discharge pumps · CPC title

• F04D29/4293

  Details of fluid inlet or outlet · CPC title

• F04D29/586

  specially adapted for liquid pumps · CPC title