A method of operating a laundry treatment includes receiving an input for a selected washing operation for a laundry load; determining a filtration requirement of the laundry load of the selected washing operation; implementing a responsive action in response to determining the filtration requirement of the laundry load, the responsive action including an activation state of a selector input on a user interface; and performing the selected washing operation according to a determined set of operating parameters.

The washing machine includes an outer tub, an inner tub rotatably provided in the outer tub, a pulsator rotatably provided in the inner tub, a power transmission shaft rotating the pulsator, a buoyancy clutch that moves up and down by buoyancy created by wash water and transfers, when the buoyancy clutch is in a lower position, rotational force from the power transmission shaft to the inner tub to allow the pulsator and the inner tub to rotate integrally with each other, a circulation passage that is provided on an outer portion of the outer tub to allow the wash water drained out of the outer tub to be returned into the outer tub, a pump provided on the circulation passage and a drain guide unit that directs the wash water under the buoyancy clutch to a drain hole of the outer tub so that the buoyancy clutch moves downward.

A positive and negative pressure system and an operation method therefor, and a positive and negative pressure electrical appliance using the positive and negative pressure system. The positive and negative pressure electrical appliance comprises: a positive and negative pressure refrigerator, a positive and negative pressure washing machine, a vacuum dishwasher/fruit and vegetable cleaning machine, a super-oxygenated water washing range hood, a positive and negative pressure oven/fryer/microwave oven, a positive and negative pressure fresh-keeping compartment, a positive and negative pressure fresh-keeping warehouse, and a positive and negative pressure modular cabinet. Regulating airflow with positive and negative pressure, or carrying multiple effective loads such as ozone, an air catalyst, a negative ion, modified atmosphere gas and water for orderly getting in and out of or staying in a positive and negative pressure chamber, and exerting the required effects on objects therein.

A method of controlling a laundry treatment apparatus, the method including: determining whether bubbles have been generated in a tub of the laundry treatment apparatus in a state in which a second washing apparatus of the laundry treatment apparatus is operated based on a sequence of operations; and based on a determination that bubbles have been generated, reducing bubbles by (i) adding at least one first operation to the sequence of operations or (ii) replacing at least one second operation of the sequence of operations, is disclosed.

A drain pump for a laundry treating apparatus includes a housing, an impeller, a motor, a circulation outlet, and a drain outlet. The circulation outlet and the drain outlet are defined on an outer circumferential surface of the housing, enable communication of the washing water with the housing, and protrude outward in directions tangential to the outer circumferential surface. The housing includes a rib that protrudes from an inner circumferential surface of the housing, that is located between the circulation outlet and the drain outlet, and that is to configured to guide the washing water to the circulation outlet or to the drain outlet based on a direction of rotation of the impeller.

Provided are a washing machine and a method for controlling the same. The method for controlling a washing machine includes supplying water to a tub, driving a driving unit to perform tumbling to rotate a drum disposed in the tub, calculating a water level variation in the tub, and displaying freeze state information on a display unit when the calculated water level variation is less than a reference water level variation.

A washing machine and a control method thereof are provided. More particularly, a washing machine of supplying a detergent automatically to a detergent mixing tub using a detachable detergent supply container, or of supplying a softening agent automatically to a softening agent mixing tub using a detachable softening agent supply container, and a method of controlling the washing machine are disclosed. Some of the disclosed embodiments provide a washing machine of supplying a detergent automatically to a washing tub using a detergent supply unit with a detergent supply container, and of supplying a softening agent automatically to the washing tub using a softening agent supply unit with a softening agent supply container, and a method of controlling the washing machine.

A method of controlling a washing machine. The washing machine includes a tub configured to receive water, a drum rotatably disposed in the tub, a volute pump including (i) an impeller configured to rotate in one or more directions to pump water discharged from the tub and (ii) a pump housing that defines a volute-shaped passage configured to guide water pumped by the impeller, and a circulating water supply device configured to supply water discharged from an outlet port of the volute pump into the drum. The method includes: supplying water and detergent into the tub; and rotating the impeller of the volute pump in a first direction to discharge a first amount of water from the volute pump, the first amount of water being less than a second amount of water discharged from the volute pump based on the impeller being rotated in a second direction.

Disclosed is a washing machine including: a gasket, wherein the gasket includes a plurality of nozzles provided on an inner circumferential surface of a gasket body to spray water into a drum, and a plurality of port receiving pipes protruding from an outer circumferential surface of the gasket body and respectively communicating with the plurality of nozzles; a distribution pipe supplying water pumped by a pump to the plurality of nozzles; and a first balancer disposed at a front surface of a tub. At least a portion of the first balancer is spaced apart from the outer circumferential surface of the gasket body, and at least a portion of a transport conduit of the distribution pipe is disposed in a space between the first balancer and the gasket body, and accordingly, separation of the distribution pipe from the gasket is prevented.

A drain pump is provided that may include a pump motor; an impeller connected to a rotational shaft of the pump motor. The impeller may include a circular hub, an impeller shaft that extends from a center of a lower surface of the hub, and a plurality of blades that extends from an outer circumferential surface of the impeller shaft and the lower surface of the hub in a radial direction of the hub. The hub may have a longitudinal cross section in which a thickness of the hub gradually increases from the center of the lower surface toward an edge thereof.