A water recycling device comprising a filtration tank, the filtration tank comprises a process inlet for providing process wash water to the filtration tank. The filtration tank comprises a filter comprising a circumferential screen separating a filter-side portion of the filtration tank from a non-filter side portion of the filtration tank, and a rotatable backflushing arm for providing a stream of backflushing water at the filter-side portion of the circumferential screen. The filtration tank further an outlet for receiving filtered process wash water from the filter-side portion of the filtration tank.

A filtering device and a washing machine. The filtering device includes: a filtering cavity, which has a water inlet, a filtered water outlet and a sewage outlet for discharging filtered impurities. A filtering mechanism is inside the filtering cavity, to filter the water entering the filtering cavity. A blocking mechanism separates the inside of the filtering cavity into a first space and a second space. The water inlet is communicated to the first space, and the filtered water outlet is connected to the first space. The cleaning particles are in the first space in the filtering cavity. The cleaning particles can prevent the deposition of filtered impurities during the filtration process and avoid clogging of the filtering device. The blocking mechanism can prevent the cleaning particles from entering the second space, and from flowing out with the water flow from the filtered water outlet or the sewage outlet.

The present disclosure provides a device, a system, and a method for filtering liquids, in particular for filtering gray water such that it can be reused for multiple purposes. Also provided is an optional step of purifying the liquid with a chemical such that the filtered liquid is also potable.