Disclosed herein is a chemical dosing system for an appliance, such as a laundry washing machine or a dishwashing machine, having a water inlet, the system comprising a meter determining the volume of water supplied to the appliance, a pump for dispensing a quantity of a chemical to the appliance and a control unit arranged to receive a signal from the meter and to cause to be dispensed to the appliance a volume of chemical that is proportional to the quantity of water supplied to the appliance. The disclosed system may enable a correct quantity of chemical to be automatically dispensed to many types of appliance, without the need to know anything about the appliance, or to derive an electrical signal from the appliance.

Disclosed herein is a chemical dosing system for an appliance, such as a laundry washing machine or a dishwashing machine, having a water inlet, the system comprising a meter determining the volume of water supplied to the appliance, a pump for dispensing a quantity of a chemical to the appliance and a control unit arranged to receive a signal from the meter and to cause to be dispensed to the appliance a volume of chemical that is proportional to the quantity of water supplied to the appliance. The disclosed system may enable a correct quantity of chemical to be automatically dispensed to many types of appliance, without the need to know anything about the appliance, or to derive an electrical signal from the appliance.

Methods and systems of load balancing a heat pump in fluid communication with a plurality of combination washing and drying machines are disclosed. A method of loading balancing the heat pump includes receiving, at a controller, a cycle status of each one of a plurality of combination washing and drying machines, identifying an available machine, determining, based on one or more load characteristics, a washing and drying cycle duration of a load of laundry. The controller is configured to determine a cycle start time of the available machine based on the determined cycle duration and temperature profiles, a cycle status of each one of the remainder of the plurality of machines, and staggering washing and drying cycles between the identified available one of the plurality of machines and the remainder of the plurality of machines to balance load on the heat pump.

Methods and systems of load balancing a heat pump in fluid communication with a plurality of combination washing and drying machines are disclosed. A method of loading balancing the heat pump includes receiving, at a controller, a cycle status of each one of a plurality of combination washing and drying machines, identifying an available machine, determining, based on one or more load characteristics, a washing and drying cycle duration of a load of laundry. The controller is configured to determine a cycle start time of the available machine based on the determined cycle duration and temperature profiles, a cycle status of each one of the remainder of the plurality of machines, and staggering washing and drying cycles between the identified available one of the plurality of machines and the remainder of the plurality of machines to balance load on the heat pump.

The present invention relates to a device for handling laundry and a control method thereof, wherein the device for handling laundry, equipped with a plurality of washing units that wash independently of one another, sets a washing course in order that, when washing is being carried out by a first washing unit and a second washing unit at the same time, a specific operation is not carried out by the first washing unit and the second washing unit at the same time, the washing course being set by combining the washing courses of the plurality of washing units, and thus, operational delays resulting from simultaneous operation are prevented, vibrations are reduced, momentary increases in power consumption are prevented, protecting the device for handling laundry and improving energy consumption efficiency.

The present invention relates to a laundry treatment device and a method for controlling the same, the laundry treatment device comprising: a first washing unit having a first tub; and a second washing unit that has a second tub and which operates independently of the first washing unit, wherein: the first washing unit comprises a heater for drying the laundry inside the first tub, a switch for tuning on/off the operation of the heater, a heater driving unit for controlling operating power supplied to the heater, and a control unit for controlling the switch such that the heater operates or stops operating, the control unit applying a control signal to the heater driving unit; when the first washing unit and the second washing unit operate simultaneously, the control unit applies a control signal following the simultaneous operation to the heater driving unit; and the heater driving unit controls operating power supplied to the heater such that power consumed by the heater decreases, in response to the control signal. The laundry treatment device, which has a plurality of washing units that perform washing independently of each other, is advantageous in that, when the plurality of washing units simultaneously conduct washing, the operation of the heater is controlled such that the amount of consumed power is adjusted, simultaneous washing can be conducted without stopping one of the plurality of washing units, the life of provided components can be increased, and any abrupt increase in the amount of consumed power can be prevented.

A fully automatic washing and drying machine includes an outer tub elastically supported in a housing; a washing/dewatering tub rotatably arranged in the outer tub; a hot air supplying unit including a heater and a fan, and air heated by the heater is supplied into the washing/dewatering tub by the fan from an upper part of the outer tub; and a discharging port arranged at a lower part of the outer tub and configured to discharge the air which has been in contact with washings in the washing/dewatering tub. The discharging port is connected to an exhaust duct extending upward, and an exhaust port is formed in the exhaust duct. The discharging port is located at a position higher than a water overflowing level at which water overflows from the outer tub.

A washer comprising: a first heater to heat washing water; a second heater to heat air; a fan to guide air; a memory to store one or more programs; and a controller which is electrically connectable to the first heater, the second heater, the blower fan, and the memory. The washer is controlled by the controller to sequentially perform a washing cycle, a first rinsing cycle, a second rinsing cycle, a spin-drying cycle, and a drying cycle, wherein the second rinsing cycle includes an operation of heating the washing water through the first heater and an operation of rotating the drum, and the spin-drying cycle may include heating the air through the second heater in at least a part of a section based on a rotation speed of the drum, and guiding the heated air into the drum by using the blower fan.

A washing machine in which a first main heater is not driven while wash water stored in a first tub and wash water stored in a second tub are simultaneously heated, and a method of controlling the same. A washing machine includes: a first tub configured to store wash water; a first main heater configured to heat wash water stored in the first tub; a first sub heater configured to heat wash water stored in the first tub; a second tub configured to store wash water; and a second heater configured to heat wash water stored in the second tub, wherein a power consumption required to drive the first main heater is greater than a power consumption required to drive the first sub heater, and the first main heater is not driven while wash water stored in the first tube and wash water stored in the second tub are simultaneously heated.

Disclosed herein is a chemical dosing system for an appliance, such as a laundry washing machine or a dishwashing machine, having a water inlet, the system comprising a meter for determining the volume of water supplied to the appliance, a pump for dispensing a quantity of a chemical to the appliance and a control unit arranged to receive a signal from the meter and to cause to be dispensed to the appliance a volume of chemical that is proportional to the quantity of water supplied to the appliance. The disclosed system may enable a correct quantity of chemical to be automatically dispensed to many types of appliance, without the need to know anything about the appliance, or to derive electrical signal from the appliance.