Abstract: The disclosure of a clothing dryer may comprise: a first water container in which condensate generated as a drying cycle is performed is stored, a drain pump driven by a brushless direct current motor, and a controller configured to: alternately drive the drain pump at a first rotational speed and stop the drain pump a predetermined number of times in response to a start of a bubble removal cycle to remove bubbles from the condensate stored in the first water container, and start a drainage cycle in which the drain pump is operated at a second rotational speed which is greater than the first rotational speed for a predetermined driving period in response to termination of the bubble removal cycle.

Abstract: An organic compound represented by a Chemical Formula 1 in accordance with the present invention exhibits excellent hole injection and hole transport characteristics. In addition, an hole transport auxiliary layer of the organic light-emitting diode in accordance with the present invention contains the organic compound represented by the Chemical Formula 1 to lower an operation voltage, and improve efficiency, and lifetime characteristics of the organic light-emitting diode.

Abstract: A negative electrode for a rechargeable lithium battery includes a current collector, and a dry negative active material layer on the current collector, the dry negative active material layer including a negative active material having a crystalline carbon core and a non-conductive layer coated on a surface of the crystalline carbon core, and a polytetrafluoroethylene binder.

Abstract: A linear compressor includes a cylinder, a piston axially reciprocating in the cylinder, a first muffler unit coupled to the piston, a back cover that is disposed at a rear of the piston and defines an opening at a radially central area, and a second muffler unit coupled to the opening. The first muffler unit includes an inner guide disposed in the piston and a first intake muffler disposed at a rear of the inner guide. The second muffler unit includes a second intake muffler that communicates with the first intake muffler and is coupled to the opening, a muffler body surrounding the second intake muffler, and a muffler cover disposed between the muffler body and the back cover.

Abstract: A linear compressor includes a cylinder, a piston axially reciprocating in the cylinder, a first muffler unit coupled to the piston, a back cover that is disposed at a rear of the piston and defines an opening at a radially central area, and a second muffler unit coupled to the opening. The first muffler unit includes an inner guide disposed in the piston and a first intake muffler disposed at a rear of the inner guide. The second muffler unit includes a second intake muffler that communicates with the first intake muffler and is coupled to the opening, a muffler body surrounding the second intake muffler, and a muffler cover disposed between the muffler body and the back cover.