Dish washer and water softener for dish washer

Patent metadata

Field	Value
Publication number	US-11986143-B2
Application number	US-202217590083-A
Country	US
Kind code	B2
Filing date	Feb 1, 2022
Priority date	Feb 1, 2021
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

A water softener for a dishwasher includes a tank body having a regeneration tank that accommodates brine, an exchange tank that accommodates an ion exchange resin, and a flow path configured to supply water to the regeneration tank and the exchange tank. The water softener further includes a regeneration inlet in communication with the regeneration tank, an exchange inlet in communication with the exchange tank, and a switching valve mounted at the tank body and configured to open and close the regeneration inlet and the exchange inlet to switch the flow path. The switching valve includes a head configured to open and close the regeneration inlet and the exchange inlet. A sealing protrusion protrudes toward the head from a circumference of the regeneration inlet and is configured to contact the head to seal the regeneration inlet.

First claim

What is claimed is:

1. A dishwasher comprising:
a main body that defines a washing space configured to receive an object to be washed;
a door configured to open and close the washing space;
a water jacket disposed at a side wall of the main body and configured to store water for washing the object;
a water softener connected to the water jacket and configured to soften the water supplied from the water jacket;
a sump connected to the water softener and disposed at a bottom of the washing space, the sump being configured to collect water in the washing space; and
a nozzle connected to the sump and configured to spray water into the washing space,
wherein the water softener comprises:
a tank body comprising:
a regeneration tank configured to accommodate brine,
an exchange tank configured to accommodate an ion exchange resin, and
a flow path configured to supply water to the regeneration tank and the exchange tank, the flow path including a regeneration inlet in fluid communication with the regeneration tank and an exchange inlet in fluid communication with the exchange tank,

a switching valve disposed at the tank body and configured to selectively open and close the regeneration inlet or the exchange inlet to thereby switch the flow path, the switching valve comprising a head configured to open and close the regeneration inlet and the exchange inlet, and
a sealing protrusion that protrudes from a circumference of the regeneration inlet toward the regeneration inlet, the sealing protrusion being configured to contact the head based on the head closing the regeneration inlet, and

wherein the sealing protrusion comprises:
a rounded part that extends radially outward from the circumference of the regeneration inlet and extends around a protruding end of the sealing protrusion, the protruding end being configured to contact the head, and
an inclined part that extends radially outward from an outer end of the rounded part in a direction inclined with respect to a surface of the head.

2. The dishwasher of claim 1 , wherein the water softener further comprises:
a tank cover that covers an upper surface of the tank body; and
a tank base that covers a lower surface of the tank body, and
wherein at least a portion of the flow path is defined at each of the tank cover and the tank base.

3. The dishwasher of claim 2 , wherein the tank body comprises a water outlet connected to the sump,
wherein the flow path comprises:
a water inflow path in fluid communication with a space between the regeneration inlet and the exchange inlet, the water inflow path being configured to supply the water of the water jacket to the space between the regeneration inlet and the exchange inlet,
a recovery flow path connected to the exchange tank and configured to guide water in the exchange tank to the water jacket, and
a water outflow path that connects the water jacket to the water outlet of the tank body and is configured to discharge the water from the water jacket to the sump,

wherein the tank cover covers upper surfaces of the water inflow path, the recovery flow path, and the water outflow path, and
wherein the tank cover defines:
a water inflow port that is connected to the water jacket and open to the water inflow path,
a recovery port that is connected to the water jacket and open to the recovery flow path, and
a water outflow port that is connected to the water jacket and open to the water outflow path.

4. The dishwasher of claim 1 , wherein the tank body has a head accommodation space that is defined between the regeneration inlet and the exchange inlet and accommodates the head, the head being configured to move in the head accommodation space, and
wherein the sealing protrusion is spaced apart from a circumference of the head accommodation space.

5. The dishwasher of claim 1 , wherein the regeneration inlet and the exchange inlet face each other, and
wherein the head is configured to selectively open and close one of the regeneration inlet or the exchange inlet based on the head linearly reciprocating between the regeneration inlet and the exchange inlet.

6. The dishwasher of claim 5 , wherein an inner diameter of the exchange inlet is greater than an inner diameter of the regeneration inlet, and
wherein the head is configured to:
close the regeneration inlet based on the head moving to and contacting the sealing protrusion, and
close the exchange inlet based on the head moving away from the sealing protrusion and inserting into the exchange inlet.

7. The dishwasher of claim 6 , wherein the head comprises a sealing rib that protrudes from a circumferential surface of the head and extends along the circumferential surface of the head, the sealing rib being configured to contact an inner surface of the exchange inlet to thereby block a gap between the head and the exchange inlet.

8. The dishwasher of claim 1 , wherein the rounded part has a contact surface defined at the protruding end of the sealing protrusion, and
wherein the inclined part is configured to be spaced apart from the surface of the head based on the contact surface of the rounded part being in contact with the head.

9. The dishwasher of claim 1 , wherein the sealing protrusion further comprises:
an inner extension part that extends from an inner end of the rounded part and defines an inner surface of the regeneration inlet; and
an outer extension part that extends parallel to the inner extension part from an outer end of the inclined part and defines at least a portion of an outer surface of the sealing protrusion.

10. The dishwasher of claim 1 , wherein the regeneration inlet and the exchange inlet face each other, and
wherein the flow path comprises an inflow path that is in communication with a space between the regeneration inlet and the exchange inlet and configured to supply water to the space between the regeneration inlet and the exchange inlet.

11. A dishwasher comprising:
a main body that defines a washing space configured to receive an object to be washed;
a door configured to open and close the washing space;
a water jacket disposed at a side wall of the main body and configured to store water for washing the object;
a water softener connected to the water jacket and configured to soften the water supplied from the water jacket;
a sump connected to the water softener and disposed at a bottom of the washing space, the sump being configured to collect water in the washing space; and
a nozzle connected to the sump and configured to spray water into the washing space,
wherein the water softener comprises:
a tank body comprising:
a regeneration tank configured to accommodate brine,
an exchange tank configured to accommodate an ion exchange resin, and
a flow path configured to supply water to the regeneration tank and the exchange tank, the flow path including a regeneration inlet in fluid communication with the regeneration tank and an exchange inlet in fluid communication with the exchange tank,

a switching valve disposed at the tank body and configured to selectively open and close the regeneration inlet or the exchange inlet to thereby switch the flow path, the switching valve comprising a head configured to open and close the regeneration inlet and the exchange inlet, and
a sealing protrusion that protrudes from a circumference of the regeneration inlet toward the regeneration inlet, the sealing protrusion being configured to contact the head based on the head closing the regeneration inlet,

wherein the switching valve further comprises:
a valve body,
a rod disposed inside the valve body and configured to move linearly along the valve body, and
a spring that

Assignees

• Lg Electronics Inc

Inventors

• Kim Jinhong
• Ko Minkyu

Classifications

• A47L15/4231 Primary

  Constructional details of the salt container or the ion exchanger · CPC title

• A47L15/4229 Primary

  Water softening arrangements · CPC title

• A47L15/4221

  Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms (A47L15/0078 takes precedence) · CPC title

• A47L15/4209

  Insulation arrangements, e.g. for sound damping or heat insulation · CPC title

• C02F1/42

  by ion-exchange (ion-exchange in general B01J) · CPC title