A multi-drum washing machine comprises at least two sets of heating devices, and at least two detection units which are correspondingly connected with the heating devices. Each detection unit is used for detecting heating information of the corresponding heating device and controlling at least one other heating device to be turned on/off according to the heating information. The heating control system of the multi-drum washing machine solves the problem that it is difficult to detect heating devices in a multi-drum washing machine, thus increasing the calculation burden of a processor. The disclosure realizes real-time detection of the heating devices through simple detection circuit hardware connection on a circuit of each heating device. The circuits are detected by using connection structures of circuit hardware, thereby saving cost, improving the sensitivity of the detection circuits and prolonging the service life of the processor of the multi-drum washing machine.

Method of determining a laundry load size in a laundry treating appliance comprising a rotatable drum at least partially defining a treating chamber for receiving laundry for treatment in accordance with a treating cycle of operation, an imaging device, and a controller having a processor, the method includes generating an image, detecting markings in the generated image, and determining, by the controller, a load size based thereon.

The laundry processing device according to the present invention comprises: a first washing unit for doing laundry; and a second washing unit having a washing space independent from the first washing unit and provided with a tub of a smaller capacity than the first washing unit, wherein the first washing unit comprises: a first display unit; a first laundry amount detecting unit for measuring the amount of laundry in the first washing unit; and a first control unit for displaying, on the first display unit, a guide message recommending use of the second washing unit if the amount of laundry measured by the first laundry amount detecting unit is less than a first set value. When the amount of laundry is relatively small, the user is induced to use the second washing unit, thereby reducing power consumption.

A control method for a laundry treating apparatus comprises a washing machine power supply step of supplying a power to a washing machine interface provided to receive a control command; a course execution step of executing a washing course by the washing machine if the washing course is input to the washing machine interface; a dryer power supply step of supplying the power to the dryer if a preheating request signal is input through the washing machine interface; and a preheating step of including a supply stroke of supplying the air to the drying drum and a heating stroke of heating the air supplied to the drying drum.

A laundry dryer performs a method for drying laundry with steam or hot air and notifying a user of water shortage. The laundry dryer includes a cabinet, a drum, a steam unit, a storage tank, a supply pump, and a steam controller. The steam controller operates the steam unit upon receiving a steam supply command to supply steam to the drum. When a water level of water stored in at least one of the steam unit or the storage tank is equal to or less than a predetermined water level, the steam controller provides a water shortage notification message for user recognition. The laundry dryer provides the water shortage notification message when a minimum amount of residual water is stored in the storage tank. The number of times to refill the storage tank can be minimized, resulting in an increase in user convenience.

A washing machine capable of communicating with a drying machine, and a method therefor are provided. The washing machine includes a communication circuitry configured to exchange data with an external device including a drying machine, a control panel including a dedicated button configured to obtain a user input for activating or deactivating a common function common with the drying machine, and at least one processor configured to, in response to obtaining the user input for activating the common function through the dedicated button, control the communication circuitry to activate the common function and transmit a communication signal for activating the common function to the drying machine, such that even if the drying machine is installed on the washing machine, the user may operate the drying machine without inconvenience.

Method of determining a laundry load size in a laundry treating appliance comprising a rotatable drum at least partially defining a treating chamber for receiving laundry for treatment in accordance with a treating cycle of operation, an imaging device, and a controller having a processor, the method includes generating an image, detecting markings in the generated image, and determining, by the controller, a load size based thereon.

An artificial intelligence apparatus determines whether a washing option in a washing course according to the input of a user is changed when input of the user is received, and collect use history information when the washing option is changed. In addition, the artificial intelligence apparatus inputs the collected use history information to an option resetting model to acquire a second washing option for resetting the washing course, and resets the washing option included in the washing course according to the second washing option.

An artificial intelligence apparatus determines whether a washing option in a washing course according to the input of a user is changed when input of the user is received, and collect use history information when the washing option is changed. In addition, the artificial intelligence apparatus inputs the collected use history information to an option resetting model to acquire a second washing option for resetting the washing course, and resets the washing option included in the washing course according to the second washing option.

Disclosed are a method for controlling a commercial washing machine by using artificial intelligence and a system for the same. The method for controlling a commercial washing machine by using artificial intelligence comprises: a step of receiving a request for use of a plurality of commercial washing machines connected to each other through a network from a user through a user terminal; a step of transmitting the request for use to a cloud server; a step in which the cloud server selects an available one of the plurality of commercial washing machines for the request for use and sets the commercial washing machine to a standby state; and a step in which the cloud server provides the user with a recommended washing course created based on a user's use history of the plurality of commercial washing machines.