Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery using a positive electrode containing the positive electrode active material. More particularly, the present invention relates to a positive electrode active material that is able to solve a problem of increased resistance according to an increase in Ni content by forming a charge transport channel in a lithium composite oxide and a lithium secondary battery using a positive electrode containing the positive electrode active material.

Abstract: Disclosed herein is a refrigerator. The refrigerator includes a body including a storage room therein, a machine room formed in the body and separated from the storage room, and a cool air generating unit including a compressor and a condenser arranged inside the machine room and providing cool air to the storage room. Here, the condenser includes a first condensing portion which faces a rear surface of the machine room and a second condensing portion which is bent from the first condensing portion and faces a first side of the machine room.

Abstract: A heat exchanger including a plurality of tubes disposed horizontally, a pair of vertical headers connecting the tubes, and at least one flow distribution baffle mounted to a header at one group of the plurality of tubes such that the flow distribution baffle is positioned between tubes of the one group. Each of the at least one flow distribution baffle is provided with at least one distribution hole allowing a refrigerant to pass therethrough. The heat exchanger prevents unbalanced distribution of the refrigerant when it operates as an evaporator of an outdoor unit.

Abstract: An outdoor heat exchanger has a total length of refrigerant flow passage in which a refrigerant flows along a refrigerant tube, and exchanges heat with outdoor air, the outdoor heat exchanger including a plurality of refrigerant tubes spaced apart from one another, a first and second header respectively coupled to both end portions of each of the refrigerant tubes, and a plurality of heat exchanging fins coupled to outer surfaces of the refrigerant tubes to widen a surface making contact with an outside, wherein a total length of a refrigerant flow passage in which a refrigerant flows along the refrigerant tube and exchanges heat with outdoor air is equal to or greater than about 1500 mm and equal to or less than about 6000 mm, in which range, the outdoor heat exchange achieves the optimum performance.

Abstract: A head chip for an ink jet type image forming apparatus with an improved cooling structure is disclosed. The head chip includes a plurality of nozzles to eject ink, a plurality of heaters for ink ejection to apply heat to ink so that the ink is ejected through the plurality of nozzles, and a cooling channel to circulate a refrigerant around the plurality of heaters for ink ejection.

Abstract: A heater of a thermal inkjet printhead. The heater is formed of tantalum aluminum oxynitride (Ta—Al—ON), wherein the tantalum aluminum oxynitride is formed of about 30 to about 60 atomic % tantalum, about 10 to about 30 atomic % aluminum, about 5 to about 30 atomic % oxygen, and about 5 to about 30 atomic % nitrogen.

Abstract: A head chip for an ink jet type image forming apparatus with an improved cooling structure is disclosed. The head chip includes a plurality of nozzles to eject ink, a plurality of heaters for ink ejection to apply heat to ink so that the ink is ejected through the plurality of nozzles, and a cooling channel to circulate a refrigerant around the plurality of heaters for ink ejection.

Abstract: A heater of a thermal inkjet printhead. The heater is formed of tantalum aluminum oxynitride (Ta—Al—ON), wherein the tantalum aluminum oxynitride is formed of about 30 to about 60 atomic % tantalum, about 10 to about 30 atomic % aluminum, about 5 to about 30 atomic % oxygen, and about 5 to about 30 atomic % nitrogen.