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Water-saving washing machine and control method

  • US 9,982,383 B2
  • Filed: 07/02/2014
  • Issued: 05/29/2018
  • Est. Priority Date: 12/12/2013
  • Status: Active Grant
First Claim
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1. A water-saving washing machine, comprising a washing drum and an outer drum, wherein a circulating pipeline is arranged between an outer drum drainage outlet and an outer drum water inlet, a drainage pump and a main filter are arranged on the circulating pipeline, a pre-filter is further arranged on the circulating pipeline, the pre-filter is located between the drainage pump and the main filter, and a compactness of a filter screen of the pre-filter is lower than that of a filter screen of the main filter;

  • wherein the pre-filter is provided with a first inlet, the first inlet is connected to an air pump through a pipeline, and the pipeline between the air pump and the first inlet is further provided with a check valve for controlling airflow to flow from the air pump to the pre-filter;

    wherein the pre-filter is provided with an aeration device positioned between the first inlet and the filter screen of the pre-filter, the aeration device is a flat plate that fits to the pre-filter in cross-section shape, and the flat plate is evenly provided with a plurality of air holes.

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