Abstract: Disclosed herein relates to a positive electrode for a lithium secondary battery, wherein the positive electrode not only has an excellent energy density by containing a ternary compound containing nickel (Ni), cobalt (Co), manganese (Mn), etc. as a positive electrode active material, but also has an advantage of improving safety due to internal short circuit of a secondary battery by including an iron phosphate compound in the outermost part with respect to a positive electrode current collector.

Abstract: The present disclosure relates to humidity sensitive nano-photonics and a manufacturing method thereof, and more particularly to humidity sensitive nano-photonics including a metasurface and a method for manufacturing the same. The humidity sensitive nano-photonics and the manufacturing method thereof according to an embodiment of the present disclosure include a metasurface that are capable of expanding and contracting depending on changes in the relative humidity of the surrounding environment, and have the advantage of being easily manufactured, mass-produced at low cost, capable of effectively adjusting the phase and intensity of light, and applicable to various materials and various shapes of surfaces as well.

Abstract: An infrared heat source module is configured to minimize problems such as wrinkles or cracks in electrodes even if the patterns of a coated part and an uncoated part of the electrodes present in a current collector vary. The module improves a drying efficiency of the coated part of the current collector. An electrode using the infrared heat source module is manufactured by a process.

Abstract: An air conditioning system, including a condenser for condensing a refrigerant, a first expansion device for throttling the refrigerant passed through the condenser, a second expansion device for throttling the refrigerant passed through the first expansion device, an evaporator for evaporating the refrigerant passed through the second expansion device, a compressor for compressing the refrigerant passed through the evaporator and the refrigerant injected after branched between the first expansion device and the second expansion device, and a control unit for detecting a value of at least one operating parameter and determining a target opening degree of the first expansion device on the basis of a stored set value corresponding to the detected value of the operating parameter.

Abstract: A drying duct and a household appliance having the same. The household appliance includes a main body, a drying space placed in the main body and including an air suction hole and an air drain hole, a drying duct including at least one inside-air suction hole communicating with the air drain hole, an inside-air discharge hole communicating with the air suction hole, and an outside-air suction hole and an outside-air discharge hole communicating with the outside of the drying space, and at least one dehumidifying agent placed in the drying duct. The drying duct includes an inside-air suction path into which air inside of the drying space is suctioned, an outside-air suction path into which air outside of the drying space is suctioned, and an inside/outside air movement path communicating with the inside-air suction path and the outside-air suction path.

Abstract: Disclosed is an apparatus and method for forming an oxidation layer on a manifold block for a fuel cell stack, which forms an oxidation layer uniformly over the entire surface of a long and complicated internal flow field of a manifold block. In particular, the apparatus for forming an oxidation layer on a manifold block for a fuel cell stack includes: an electrolyte bath which contains an electrolyte required for the formation of the oxidation layer, an electrode for supplying a required electron flow for the formation of the oxidation layer from a power supply to the manifold block immersed in the electrolyte of the electrolyte bath and to the electrolyte, and an air supply for supplying oxygen to the electrolyte. Even more particularly, the electrode connected to the electrolyte is inserted into each internal flow field of the manifold block to provide an effective electron flow therein.

Abstract: An air conditioning system includes a phase separator separating a gaseous refrigerant and a liquid refrigerant from a flowing refrigerant, an evaporator evaporating the liquid refrigerant separated by the phase separator, and at least one compressor including a first compressing part receiving the refrigerant via the evaporator and a second compressing part receiving both of the gaseous refrigerant separated by the phase separator and the refrigerant via the first compressing part.

Abstract: Disclosed is an apparatus and method for forming an oxidation layer on a manifold block for a fuel cell stack, which forms an oxidation layer uniformly over the entire surface of a long and complicated internal flow field of a manifold block. In particular, the apparatus for forming an oxidation layer on a manifold block for a fuel cell stack includes: an electrolyte bath which contains an electrolyte required for the formation of the oxidation layer, an electrode for supplying a required electron flow for the formation of the oxidation layer from a power supply to the manifold block immersed in the electrolyte of the electrolyte bath and to the electrolyte, and an air supply for supplying oxygen to the electrolyte. Even more particularly, the electrode connected to the electrolyte is inserted into each internal flow field of the manifold block to provide an effective electron flow therein.

Abstract: A fan apparatus and an air conditioner employing such a fan apparatus are provided to reduce noise and enhance efficiency. The fan apparatus may be driven by a BLDC motor that stably drives the fan and increases an air flow rate. Heat exchange efficiency of an outdoor unit of a front suction/discharge type air conditioner may be improved by such a fan apparatus driven by such a BLDC motor.

Abstract: A drying duct and a household appliance having the same. The household appliance includes a main body, a drying space placed in the main body and including an air suction hole and an air drain hole, a drying duct including at least one inside-air suction hole communicating with the air drain hole, an inside-air discharge hole communicating with the air suction hole, and an outside-air suction hole and an outside-air discharge hole communicating with the outside of the drying space, and at least one dehumidifying agent placed in the drying duct. The drying duct includes an inside-air suction path into which air inside of the drying space is suctioned, an outside-air suction path into which air outside of the drying space is suctioned, and an inside/outside air movement path communicating with the inside-air suction path and the outside-air suction path.

Abstract: It is possible to prevent that a liquid refrigerant is included in a refrigerant injected into a compressor. Accordingly, the risk of liquid compression of the compressor is greatly reduced, thereby decreasing the possibility of damage to the compressor and improving reliability and performance.

Abstract: An air includes: a compressor for compressing a refrigerant; an indoor heat exchanger for cooling or heating indoor with a refrigerant; an outdoor heat exchanger for exchanging heat of a refrigerant and outdoor air; an outdoor fan for ventilating outdoor air with the outdoor heat exchanger; a cooling/heating switching valve for switching cooling/heating; a first expansion device installed between the indoor heat exchanger and the outdoor heat exchanger; a CNT heater module installed between the outdoor heat exchanger and the cooling/heating switching valve to evaporate a refrigerant; a second expansion device installed between the outdoor heat exchanger and the CNT heater module; and a controller for sustaining a heating mode of the cooling/heating switching valve.

Abstract: An air conditioning system can improve the cooling/heating performance of the system because the injection of refrigerant into the compressor is achieved. The air conditioning system can further improve the cooling/heating performance in a low temperature region by injecting refrigerant as a two-phase refrigerant or a superheated vapor state into the compressor. The air conditioning system can prevent damage of the compressor and further improve reliability by controlling such that the ratio of a liquid refrigerant in the refrigerant injected into the compressor may be less than a set value.

Abstract: A rotary compressor includes a driving shaft having an eccentric portion, a cylinder, and a roller installed on an outer circumference of the eccentric portion to contact an inner circumference of the cylinder, performing a rolling motion along the inner circumference and forming a fluid chamber to suck and compress fluid along with the inner circumference. A vane is installed elastically in the cylinder to contact the roller continuously. Discharge ports communicate with the fluid chamber. Suction ports communicate with the fluid chamber and are spaced apart from each other by a predetermined angle. A valve assembly selectively opens any one of the suction ports according to a rotation direction of the driving shaft. Compression spaces having different volumes are formed in the fluid chamber according to the rotation direction of the driving shaft such that two different compression capacities are formed.

Abstract: A rotary compressor includes a driving shaft rotatable clockwise and counterclockwise, and an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion to contact an inner circumference of the cylinder; a vane installed elastically in the cylinder to contact the roller continuously; a first bearing installed in the cylinder, for supporting the driving shaft rotatably; a second bearing rotatably supporting the driving shaft and preliminarily storing the fluid to be sucked; discharge ports communicating with the fluid chamber; and a valve assembly having openings separated by predetermined angle from each other, wherein compression spaces that have different volumes from each other are formed in the fluid chamber according to the rotation direction of the driving shaft so that two different compression capacities are formed.

Abstract: A rotary compressor for changing a compression capacity of the compressor includes a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion so as to contact an inner circumference of the cylinder; a vane installed elastically in the cylinder to contact the roller continuously; a first bearing installed in the cylinder, for rotatably supporting the driving shaft; a second bearing installed in the cylinder, for rotatably supporting the driving shaft and guiding the fluid into the fluid chamber; discharge ports communicating with the fluid chamber; and a valve assembly having openings separated by a predetermined angle from each other, the valve assembly having a center which is eccentrically installed by a predetermined distance from a center of the cylinder.

Abstract: An air conditioning system, comprising: a channel to carry a flow of refrigerant, and a first noise reducer to change at least one property of the refrigerant as the refrigerant flows through the channel.

Abstract: A refrigerator having a main body includes a refrigerating chamber and a freezing chamber provided for storing foods. A cool air-generating device provided in the body generates cool air and a cool air-supplying device including at least one opening for discharging the cool air, is used to circulate the cool air through the freezing chamber, the refrigerating chamber, and the cool air-generating device. A separator provided adjacent to the opening acts to uniformly diffuse the cool air in the freezing chamber and the refrigerating chamber. The separator acts to separate two flows that are then brought back together. The collision and mixing of the two flows create a turbulent flow of air that is directed into the refrigerating and freezing chambers.

Abstract: An air-conditioning system and a controlling method for the same that is capable of improving the operational efficiency of the air-conditioning system are disclosed. The air-conditioning system includes a phase separator (500) for separating a flowing refrigerant into a gas-phase refrigerant and a liquid-phase refrigerant, an evaporator (600) for evaporating the liquid-phase refrigerant separated by the phase separator (500), a compressor (100) having a first compression part into which the refrigerant having passed through the evaporator (600) is introduced and a second compression part into which both the gas-phase refrigerant separated by the phase separator (500) and the refrigerant having passed through the first compression part are introduced, and a control unit for simultaneously or selectively controlling the amount of the refrigerant introduced into the phase separator (500) and the amount of the refrigerant discharged from the phase separator (500).

Abstract: The present invention discloses a refrigerator which can individually cool a freezing chamber and a refrigerating chamber by dividing a heat exchange region of an evaporator into a freezing chamber side region and a refrigerating chamber side region, forming individual circulation passages for supplying cool air from each region to the freezing chamber and the refrigerating chamber, and forming a freezing chamber fan and a refrigerating chamber fan on each circulation passage, and method for controlling operation of the same which can efficiently perform a cooling operation and reduce power consumption by effectively controlling the operations of each component.