Abstract: An air conditioning device includes a plurality of ejectors which have a refrigerant circuit including a compressor, a condenser and an evaporator, are connected in parallel to the refrigerant circuit, and are formed so as to each have a different maximum refrigerant flow, and a control unit which, according to a driving condition of the air conditioning device, controls so that the refrigerant flows to one ejector among the plurality of ejectors, and the refrigerant does not flow to the rest of the ejectors.

Abstract: A cooking apparatus having a hood according to the disclosure may increase suction performance of a blower fan by arranging the blower fan beneath a cooking chamber to force air to be inhaled into the housing as a whirling current of air, and improve suction performance of the blower fan by arranging at least one auxiliary outlet around and outside the blower fan for some of the inhaled air to be discharged downward to form an air curtain around the inlet. Furthermore, a duct may be formed inside the housing of the cooking apparatus having the hood for an inhaled substance through the inlet to be easily moved to the outlet.

Abstract: A cooking apparatus having a hood according to the disclosure may increase suction performance of a blower fan by arranging the blower fan beneath a cooking chamber to force air to be inhaled into the housing as a whirling current of air, and improve suction performance of the blower fan by arranging at least one auxiliary outlet around and outside the blower fan for some of the inhaled air to be discharged downward to form an air curtain around the inlet. Furthermore, a duct may be formed inside the housing of the cooking apparatus having the hood for an inhaled substance through the inlet to be easily moved to the outlet.

Abstract: The present disclosure relates to an air conditioning device having a plurality of ejectors, the air conditioning device comprising a plurality of ejectors which have a refrigerant circuit comprising a compressor, a condenser and an evaporator, are connected in parallel to the refrigerant circuit, and are formed so as to each have a different maximum refrigerant flow, and a control unit which, according to a driving condition of the air conditioning device, controls so that the refrigerant flows to one ejector among the plurality of ejectors, and the refrigerant does not flow to the rest of the ejectors.

Abstract: A full front blowing type air conditioner is disclosed. The disclosed full front blowing type air conditioner includes a case of which a heat exchanger is disposed in an inner side; and a blower module disposed in rear of the heat exchanger in the case, and configured to discharge a pulse jet for blowing through a front face of the case. The blowing module changes air pressure of a cavity formed between at least one pair of piezoelectric diaphragms and discharges the pulse jet to a side of the heat exchanger according to periodic deformation of the pair of piezoelectric diaphragms to opposite phases to each other.

Abstract: A humidifier including a spray unit configured to apply electric charge to water, and to spray water having electric charge applied thereto, an evaporation unit formed with a duct in which evaporation of the electrically-charged water being sprayed is taken place, and configured to guide a vapor and a foreign substance, which are separated from each other through the evaporation, to an outside, and a dust collection unit configured to collect the foreign substance at an inside the duct by forming an electric field, the humidifier capable of performing a large-capacity humidification by the generation of the electrically charged droplets, and capable of removing the foreign substance included in the droplets by using the electrical force, thereby enhancing the cleanliness of the humidification, and by using an electric field, accelerating the evaporation so that the size of the duct is minimized, and thus manufacturing the humidifier in a compact size.

Abstract: A cooling unit includes a heat radiant having a heat radiating plate contacting a heating element, and a plurality of heat radiation pins protruding from the heat radiating plate and separated from each other with predetermined intervals therebetween, and formed of an electrical insulating material; and an ionic wind generating unit comprising a corona emitter electrode contacting at least one of the heat radiation pins, a collector electrode facing the corona emitter electrode, and a power unit to connect the corona emitter electrode to the collector electrode and to apply a high voltage to the corona emitter electrode. Thus, the corona emitter electrode and the collector electrode of the ionic wind generating unit may be directly attached to the heat radiant, and a small and light cooling unit may be formed.

Abstract: A cooling unit includes a heat radiant having a heat radiating plate contacting a heating element, and a plurality of heat radiation pins protruding from the heat radiating plate and separated from each other with predetermined intervals therebetween, and formed of an electrical insulating material; and an ionic wind generating unit comprising a corona emitter electrode contacting at least one of the heat radiation pins, a collector electrode facing the corona emitter electrode, and a power unit to connect the corona emitter electrode to the collector electrode and to apply a high voltage to the corona emitter electrode. Thus, the corona emitter electrode and the collector electrode of the ionic wind generating unit may be directly attached to the heat radiant, and a small and light cooling unit may be formed.

Abstract: A method and an inkjet printing apparatus for ejecting ink in a deflected manner are provided. The inkjet printing apparatus includes an inkjet printhead having a passage plate, an electrostatic-force-application unit, and a heating unit. The passage plate includes ink chambers that hold ink and nozzles that eject the ink from the ink chambers as ink droplets. The electrostatic-force-application unit applies an electrostatic force. The heating unit heats up a portion of the ink inside the nozzles. The heating unit can include heaters disposed around each nozzles or a laser diode disposed outside the inkjet printhead. The electrostatic force forms a meniscus at the surface of the ink inside the nozzle. When a portion of the ink inside the nozzle is heated by the heating unit, the shape of the meniscus is changed and the direction in which the ink droplets are ejected through the nozzles is deflected.

Abstract: An inkjet printhead includes an ink flow channel including a pressure chamber, a nozzle to communicate with the pressure chamber, an actuator to provide a driving force to eject ink from the pressure chamber, and a plurality of electrodes, a lower voltage is applied to an electrode closer to the nozzle as compared to an electrode farther from the nozzle to form a non-uniform electric field in the ink flow channel, and a method of removing bubbles in the inkjet printhead.

Abstract: A display apparatus having a front substrate that is a display panel, a rear substrate disposed at a predetermined distance apart from the front substrate and facing the front substrate, the rear substrate comprising a back light unit, and a cooling device to remove heat generated by the rear substrate. The cooling device includes an actuator disposed between the front substrate and the rear substrate, the actuator to generate an ion wind using a voltage, a transparent electrode installed to face the actuator and which is grounded, a plurality of supports to support ends of the actuator, and a high-voltage power source to apply a voltage to the actuator.

Abstract: A display apparatus having a front substrate that is a display panel, a rear substrate disposed at a predetermined distance apart from the front substrate and facing the front substrate, the rear substrate comprising a back light unit, and a cooling device to remove heat generated by the rear substrate. The cooling device includes an actuator disposed between the front substrate and the rear substrate, the actuator to generate an ion wind using a voltage, a transparent electrode installed to face the actuator and which is grounded, a plurality of supports to support ends of the actuator, and a high-voltage power source to apply a voltage to the actuator.

Abstract: A heating structure of an inkjet printhead and an inkjet printhead including the heating structure. The heating structure includes a substrate, a heater formed on the substrate, an electrode formed on the heater, a passivation layer formed to cover the heaters and the electrodes, and carbon nanotubes (CNTs) formed in the passivation layer.

Abstract: A method and an inkjet printing apparatus for ejecting ink in a deflected manner are provided. The inkjet printing apparatus includes an inkjet printhead having a passage plate, an electrostatic-force-application unit, and a heating unit. The passage plate includes ink chambers that hold ink and nozzles that eject the ink from the ink chambers as ink droplets. The electrostatic-force-application unit applies an electrostatic force. The heating unit heats up a portion of the ink inside the nozzles. The heating unit can include heaters disposed around each nozzles or a laser diode disposed outside the inkjet printhead. The electrostatic force forms a meniscus at the surface of the ink inside the nozzle. When a portion of the ink inside the nozzle is heated by the heating unit, the shape of the meniscus is changed and the direction in which the ink droplets are ejected through the nozzles is deflected.

Abstract: An inkjet printhead including a passage plate in which a manifold to supply ink and a nozzle to eject ink are formed; a first electrode and a second electrode formed on the passage plate around the nozzle to generate an ion wind by ionizing air between the first and second electrodes by a voltage that is applied between the first and second electrodes, and a third electrode and a fourth electrode to generate an electrostatic force by a voltage applied between the third and fourth electrodes, wherein the third electrode is separated from the passage plate and the fourth electrode is formed on the passage plate.

Abstract: A piezoelectric inkjet printhead capable of reducing a crosstalk and a method of manufacturing the same are provided. The inkjet printhead includes an upper substrate, an intermediate substrate, and a lower substrate that are sequentially stacked, wherein the upper substrate includes piezoelectric actuators on an upper surface of the upper substrate and pressure chambers and first restrictors on a lower surface of the upper substrate, the first restrictors extending from the pressure chambers and having a width smaller than a width of the pressure chambers, the intermediate substrate includes dampers passing therethrough, the dampers corresponding to the pressure chambers and second restrictors extending between the first restrictors and a manifold formed from a lower surface of the intermediate substrate and the lower substrate includes nozzles passing therethrough, the nozzles corresponding to the dampers.

Abstract: An inkjet printhead assembly including an inkjet printhead chip having an ink inflow hole, a frame having an ink supply hole, and an ink supply apparatus having a preheater and an ink supply outlet, wherein the frame is disposed between the inkjet printhead chip and the ink supply apparatus, the inkjet printhead chip is attached to the frame, and the ink supply hole is disposed between the ink supply outlet and the ink inflow hole, so as to channel ink between the ink supply apparatus and the inkjet printhead chip.

Abstract: A heating structure of an inkjet printhead and an inkjet printhead including the heating structure. The heating structure includes a substrate, a heater formed on the substrate, an electrode formed on the heater, a passivation layer formed to cover the heaters and the electrodes, and carbon nanotubes (CNTs) formed in the passivation layer.

Abstract: An inkjet image forming apparatus and a print method using the same. The inkjet image forming apparatus includes an inkjet printhead cartridge having one or more nozzle units and a plurality of nozzles arranged over its length and disposed in nozzle units corresponding to a width of a print medium in a main scanning direction, and a shifting unit to move the nozzle units in the main scanning direction within the inkjet cartridge to eject ink, wherein the inkjet printhead cartridge is fixed with respect to the main scanning direction, and the nozzles are divided into respective ones of the nozzle units.

Abstract: A method of ejecting ink from a ink-jet printhead includes filling a rear end of a nozzle with ink using a capillary force, the rear end of the nozzle being surrounded by a hydrophilic layer, forming an electric field directed toward an outlet of the nozzle on a front end of the nozzle, the front end of the nozzle being surrounded by a hydrophobic layer, varying a surface tension of ink to separate ink droplets having a predetermined volume from ink and to move the separated ink droplets within the front end of the nozzle toward the outlet of the nozzle, and ejecting the separated ink droplets through the outlet of the nozzle.