An exemplary embodiment of the present disclosure relates to a washing machine including a dissolving unit, and the dissolving unit includes: an outer body which is formed to have a hollow interior, and has one side formed to be opened, and the other side having a drain hole; a dissolving cap which is coupled to one side of the outer body so as to store air therein, and has a dissolving inlet port formed to supply water supplied from the outside into the inner body; and a discharge check valve which is installed at the other side of the outer body, and opens and closes the drain hole.

A washing machine including a dissolving unit and a bubble generating unit. The dissolving unit includes a hollow outer body that has an open end, a hollow inner body that has an open end. The inner body is disposed in the outer body. The gap between the inner body and the outer body forms a dissolving flow path. A dissolving cap is coupled to one side of the outer body to retain air in the outer body and the inner body. A dissolving inlet port is formed on the dissolving cap to receive water supplied from the outside to the inner body.

A washing machine capable of generating bubbles from a water/air mixture and supplying bubbles to the tub to facilitate removal of residual detergent or the like from laundry during washing or rinsing operations. The washing machine has a dissolving unit with an air supply check valve and can receive air from outside of the dissolving unit in accordance with a pressure in the dissolving unit. Air contained in the dissolving unit can be dissolved in water contained therein to produce water/air mixture. A bubble generating unit receives the water/air mixture from the dissolving unit and generates bubbles as the mixture passes along a water flow path and a pressure reduction region in the bubble generating unit.

An exemplary embodiment of the present disclosure relates to a washing machine, and the washing machine includes: a water supply unit which supplies washing water; a dissolving unit which stores air therein, and mixes the supplied washing water and the inside air so that the stored air is dissolved in the supplied washing water; a pressure pump which selectively pressurizes the washing water to be supplied into the dissolving unit from the water supply unit; a pressure sensor which detects pressure of the washing water supplied into the dissolving unit; and a control unit which controls the pressure pump based on information detected by the pressure sensor.

A washing machine includes a tub for accommodating a drum; a water supplier configured to supply water to the tub; a turbidity sensor configured to detect turbidity of water in the tub; a circulation bubble device configured to perform a circulation operation of circulating water in the tub and resupplying it to the tub or a bubble supply operation of generating bubbles and supplying them to the tub; and a controller configured to perform a first rinsing cycle when the turbidity of the water in the tub is higher than a first reference value, and control the water supplier so that water containing a softener is supplied to the tub and perform a second rinsing cycle by controlling the circulation bubble device to alternately perform the circulation operation and the bubble supply operation when the turbidity of the water in the tub is lower than the first reference value.

This disclosure of a liquid treatment device includes a first metal electrode having a part disposed in a reaction tank into which a water being treated is filled, a second metal electrode disposed in the reaction tank, an insulator having an opening portion disposed to surround the first metal electrode so that a closed space is formed. A bubble is generated from the closed space to the water being treated via the opening portion. The liquid treatment device also includes a gas supply device that supplies the space with a gas for generating the bubble, and a power supply that applies a voltage between the first metal electrode and the second metal electrode.

A control method of a washing machine which includes a tub, a drum, a detergent supplier including a detergent storage space to store detergent and a softener storage space to store a softener, a water supplier to supply water to the tub, a turbidity sensor to detect turbidity of water in the tub, and a bubble circulator to perform a circulation operation of circulating water or a bubble supply operation of generating bubbles and supplying the generated bubbles to the tub, includes detecting, by the turbidity sensor, the turbidity of water in the tub, and in response to the detected turbidity of the water in the tub being lower than a first reference value, controlling the water supplier to supply water containing the softener to the tub and controlling the bubble circulator to perform a second rinsing cycle by alternately performing the circulation operation and the bubble supply operation.

A bubble generating apparatus may include a driving shaft that rotates a drum, a rotatable fan on the driving shaft to generate an air flow as the fan rotates, a housing having a receiving space including or enclosing the rotatable fan, and an air tube connecting a stationary tub in the drum and the housing, configured to guide air from the housing to the drum.

A laundry treatment device and a control method for the laundry treatment device aim to solve the problems that improvements are required in existing washing machines for removing stains from laundry and the dissolving effect of a detergent. The laundry treatment device includes: an inner drum, the inner drum provided with a vent; a ventilation member, the ventilation member including an air inlet and an air outlet; and a gas generating device, the gas generating device comprising a gas outlet, where the gas outlet communicates with the air inlet, and gas generated by the gas generating device passes from the air outlet and through the ventilation hole, and enters a water storage area of the inner drum. According to the arrangement, dirt on the laundry can be efficiently stripped, the amount of detergent used and residues are reduced, and the dirt removal dissolving effect of the detergent are improved.

A washing machine includes a water tub; a water supply device to supply water into the water tub; a detergent supply device to supply detergent; a circulating device to circulate the water supplied into the water tub; a drum mounted in the water tub to receive clothes therein; a motor to rotate the drum; and a control unit to control the water supply device and the detergent supply device so that the water and the detergent are supplied into the water tub, bubbles of detergent dissolved water are generated, and washing of functional clothes is performed using the bubbles by varying a drive operation rate of the motor stepwise for a washing period.