Filter cleaning apparatus and method for dishwashing appliance

Patent metadata

Field	Value
Publication number	US-12465191-B2
Application number	US-202318526949-A
Country	US
Kind code	B2
Filing date	Dec 1, 2023
Priority date	Dec 1, 2023
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A dishwashing appliance with a manifold for removing dishwashing sediment from recirculated dishwashing fluid is provided. The dishwashing appliance may include a tub, a spray system, a recirculation pump, a drainage pump, a manifold, and/or a shrouded filtration assembly in fluid communication with the spray system, manifold, the recirculation pump, and/or the drainage pump. The shrouded filtration assembly may include a manifold, a filter frame, and/or a sump housing. The manifold may include one or more sprayers.

First claim

What is claimed is:

1 . A dishwashing appliance comprising:
a dishwashing tub defining a dishwashing chamber having a tub floor therein; a manifold positioned adjacent an opening in the tub floor of the dishwashing chamber, wherein the manifold includes one or more sprayers; a filter frame depending downwardly from the manifold, wherein the filter frame includes an upstream side and a downstream side, wherein the dishwashing fluid is filtered inwardly through the filter frame from the upstream side to the downstream side; and wherein the one or more sprayers of the manifold spray outwardly through the filter frame, opposite to the dishwashing fluid, from the downstream side to the upstream side.

2 . The dishwashing appliance of claim 1 wherein the manifold includes a first flow path having at least one first sprayer of the one or more sprayers and a second flow path having at least one second sprayer of the one or more sprayers.

3 . The dishwashing appliance of claim 2 wherein the at least one first sprayer is different than the at least one second sprayer.

4 . The dishwashing appliance of claim 2 wherein the first flow path and the second flow path are radially spaced from each other.

5 . The dishwashing appliance of claim 2 wherein the filter frame includes a bottom portion and a top portion, wherein the top portion is adjacent the manifold and the bottom portion is distal from the manifold, and wherein the at least one first sprayer is configured to spray through the downstream side to the upstream side of the bottom portion and the at least one second sprayer is configured to spray through the downstream side to the upstream side of the top portion.

6 . The dishwashing appliance of claim 1 further comprising a spray system having one or more distribution devices within the dishwashing chamber;
a recirculation pump configured to flow dishwashing fluid to the spray system and the one or more sprayers of the manifold;
a drainage pump configured to flow dishwashing fluid and debris to a drainage pipe; and
a sump housing having an open top portion through which the filter frame coupled, and a base portion having a recirculation intake port in fluid communication with the recirculation pump via a recirculation pump inlet port and a recirculation pump outlet port, and a debris collection chamber in fluid communication with the drainage pump and the drainage pipe via a drainage pump port and a drainage port, wherein when dishwashing fluid is extracted by the recirculation pump through the filter frame to the recirculation pump via the recirculation intake port and the recirculation pump inlet port, and into both the spray system and the one or more sprayers of the manifold via the recirculation pump outlet port therefrom.

7 . The dishwashing appliance of claim 1 wherein the one or more sprayers are configured to spray debris from the upstream side of the filter frame outwardly towards a debris collection chamber.

8 . The dishwashing appliance of claim 1 wherein the one or more sprayers of the manifold are downstream of the filter frame.

9 . The dishwashing appliance of claim 1 further comprising a filtration assembly positioned at a bottom of the dishwashing chamber through the opening formed by the tub floor thereof, the filtration assembly comprising:
the manifold positioned at a top of the filtration assembly and above the opening of the tub floor to form a gap therebetween around a periphery of the manifold to allow the dishwashing fluid to flow into the filtration assembly, and wherein the manifold includes the one or more sprayers;
the filter frame coupled to the manifold defining a filtration chamber, the dishwashing fluid flows through the filter frame into the filtration chamber for filtration;
a sump housing having an open top through which the filter frame is disposed and a base portion having a recirculation intake port in downstream communication with the filtration chamber, and wherein the sump housing defines a debris collection chamber, the dishwashing fluid flows to the debris collection chamber outside the filtration chamber; and
wherein the one or more sprayers of the manifold sprays away from the filtration chamber and in a direction upstream of the filtration chamber towards the debris collection chamber.

10 . The dishwashing appliance of claim 9 further comprising a first flow path having at least one first sprayer of the one or more sprayers and a second flow path having at least one second sprayer of the one or more sprayers.

11 . The dishwashing appliance of claim 10 wherein the at least one first sprayer is different than the at least one second sprayer.

12 . The dishwashing appliance of claim 10 wherein the first flow path and the second flow path are radially spaced from each other.

13 . The dishwashing appliance of claim 10 wherein the filter frame includes a bottom portion and a top portion, wherein the top portion is adjacent the manifold and the bottom portion is adjacent the recirculation intake port, and wherein the at least one first sprayer is configured to spray through a downstream side to an upstream side of the bottom portion and the at least one second sprayer is configured to spray through a downstream side to an upstream side of the top portion.

14 . The dishwashing appliance of claim 9 wherein an outer periphery of the filter frame is spaced inwardly from an outer periphery of the manifold.

15 . The dishwashing appliance of claim 1 wherein the filter frame includes at least a first filter portion above at least a second filter portion, which is configured to spray at least the second filter portion with a first sprayer of the one or more sprayers and spray at least the first filter portion with a second sprayer of the one or more sprayers different from the first sprayer.

16 . The dishwashing appliance of claim 1 wherein the manifold includes a first path in communication with a first sprayer of the one or more sprayers and a second path in communication with a second sprayer of the one or more sprayers.

17 . The dishwashing appliance of claim 1 wherein the manifold includes a second sprayer of the one or more sprayers positioned at a larger radius than a first sprayer of the one or more sprayers in the manifold.

Assignees

• Midea Group Co Ltd

Inventors

• Boyer Joel

Classifications

• A47L15/4208

  Arrangements to prevent clogging of the filters, e.g. self-cleaning · CPC title

• A47L15/4219

  Water recirculation (A47L15/0078 takes precedence) · CPC title

• A47L15/0039 Primary

  Filter cleaning phases · CPC title

• A47L15/4206

  Tubular filters · CPC title

• A47L15/4204 Primary

  Flat filters · CPC title