Patent ID: 9605368
Date: 2017-03-28
CPC Classifications: D06F

Claim:
1. A self-cleaning washing machine, comprising: an outer drum; an inner drum; a wave wheel; a water drainage apparatus arranged under the outer drum; cleaning pellets provided in a chamber defined between the inner drum and the outer drum for cleaning an inner wall of the outer drum and an outer wall of the inner drum; and an isolating structure for preventing the cleaning pellets from escaping from the chamber, wherein the isolating structure comprises at least one of a filtration mechanism arranged in the water drainage apparatus to prevent the cleaning pellets from being flushed away when water is drained, and a grid mechanism arranged at the bottom part of the inner drum to prevent the cleaning pellets from entering the inner drum from the bottom of the inner drum, wherein the water drainage apparatus comprises a water drainage chamber, a pellet receiving chamber for receiving the cleaning pellets during dewatering and floating, under the buoyant force during water feeding, the cleaning pellets to the chamber to clean the drum walls, and a through port, being in communication with a water drainage port at the bottom of the outer drum, formed on an upper wall of the pellet receiving chamber, wherein the upper wall of the pellet receiving chamber inclines upward from its periphery to the through port so as to enable the cleaning pellets to float with a water level in the pellet receiving chamber, flow to the through port, and enter the chamber between the inner and outer drums through the water drainage port; wherein the filtration mechanism comprises multiple stopping ribs formed between the pellet receiving chamber and the water drainage chamber, wherein the stopping ribs are divided into two groups by a notch having a width smaller than the cleaning pellets, extension lines of the two groups of stopping ribs are alternate, a filtration gap smaller than the cleaning pellets is defined between the two adjacent stopping ribs in the same group, and one side of the two groups of the stopping ribs corresponding to the pellet receiving chamber forms a filtration surface that is a cambered surface towards the notch so that the filtration surface is of V-shaped with a bottom at the notch, such that the filtration mechanism enables to prevent the cleaning pellets from being discharged from the pellet receiving chamber, and enables lint twined on the stopping ribs to slide to tail ends of the stopping ribs and pass through the notch to the water drainage chamber, and enables sundries including sheet-like objects to pass through one of the filtration gap and the notch to the water drainage chamber.