Abstract: The present invention relates to a small interfering RNA (siRNA) suppressing the expression of adenine nucleotide trnaslocator 2 (ANT2) gene and an anticancer agent containing the same. Particularly, the invention relates to ANT2 siRNA comprising a sense sequence selected from the nucleotide sequences of ANT2 mRNA, a hairpin loop sequence and an antisense sequence binding complementarily to the said sense sequence and an anticancer agent containing the same. ANT2 siRNA of the present invention inhibits the expression of ANT2 gene, suggesting that it inhibits the growth of cancer cells exhibiting high level of ANT2. Therefore, ANT2 siRNA of the invention can be effectively used for gene therapy for cancer treatment and further prevents the anticancer effect from decreasing by anticancer drug resistance of cancer cells.

Abstract: An air conditioner includes first and second compressors, an outdoor heat exchanger through which refrigerant discharged from the first and second compressors passes, an outdoor fan for forcedly directing air toward the outdoor heat exchanger, an expansion valve for expanding the refrigerant discharged from the outdoor heat exchanger, an indoor heat exchanger through which the refrigerant expanded in the expansion valve passes, a linear expansion valve for adjust a flow rate of the refrigerant, a load detecting unit for deterring an indoor load, and a control unit for controlling the operation of the first and second compressors in accordance with the detected indoor load. In a state where the second compressor is not driven, the control unit allows the second compressor to drive when a driving start conditioner of the second compressor is satisfied and a driving start retarding time has been elapsed.

Abstract: An air conditioner incorporates valve devices mounted in a plurality of indoor units, respectively, for allowing refrigerant discharged from an outdoor heat exchanger to be introduced into one or more indoor units that are in operation. The refrigerant is prevented from being introduced into the other indoor units that are not in use, and therefore, oil is prevented from being accumulated in the other indoor units that are not in use. Also, an appropriate amount of refrigerant is supplied to the indoor units that are in operation, and therefore, reliability and efficiency of the air conditioner are improved.

Abstract: A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operation load and an operation frequency of the first compressor is a maximum frequency of the first compressor, a second compressor is operated; and a step in which when the operation load is reduced, if the outputted compressing capacity of the air-conditioner is greater than the compressing capacity corresponding to the operation load and the operation frequency of the first compressor is a minimum frequency of the first compressor, the second compressor is stopped.

Abstract: Disclosed are an air conditioner and a refrigerant control method thereof. An air conditioner according to an embodiment of the invention an outdoor unit including a compressor, an outdoor heat exchanger, and a four-way valve that switches a flow passage of refrigerant, an indoor unit including an indoor heat exchanger, an indoor expansion unit disposed at a refrigerant inlet side of the indoor heat exchanger and allowing the refrigerant to be expanded during the cooling operation, an outdoor expansion unit disposed at a refrigerant inlet side of the outdoor heat exchanger and allowing the refrigerant to be expanded during the heating operation, and a control unit controlling the indoor expansion unit and the outdoor expansion unit such that the refrigerant is expanded in the indoor expansion unit during the cooling operation and the refrigerant is expanded in the outdoor expansion unit during the heating operation.

Abstract: An operation of a multi-type air conditioner, which includes a refrigerant distributor provided between one outdoor unit and a plurality of indoor units is controlled. A refrigerant supply controller determines indoor temperatures of a plurality of indoor units, decides to operate a compressor on the basis of the determined indoor temperatures, and transmits the determined operation of the compressor to an outdoor unit controller. The refrigerant supply controller determines the temperature of a refrigerant supplied to a plurality of operational indoor units and the temperature of a returned refrigerant, and adjusts the degree of opening/closing of a plurality of electronic expansion valves according to a difference between the determined temperatures of the supplied refrigerant and the returned refrigerant such that the amount of the refrigerant supplied to a plurality of indoor units are adjusted.

Abstract: A driving controlling apparatus for an air conditioner having a plurality of compressors, and a method thereof. The apparatus comprises a flow amount distribution resistor installed at an outlet of an expansion valve, for passing a certain amount of refrigerant; and a controlling unit for detecting a current load and outputting a control signal so as to introduce a certain amount of refrigerant into the flow amount distribution resistor based on a driving mode corresponding to the detected load.

Abstract: A driving controlling apparatus for an air conditioner having a plurality of compressors, and a method thereof. The apparatus comprises a flow amount distribution resistor installed at an outlet of an expansion valve, for passing a certain amount of refrigerant; and a controlling unit for detecting a current load and outputting a control signal so as to introduce a certain amount of refrigerant into the flow amount distribution resistor based on a driving mode corresponding to the detected load.

Abstract: A stand-type air conditioner including a casing having at least two air discharge openings and an air suction opening, and a blower fan installed therein. Also included are at least two heat exchangers positioned adjacent to the air discharge openings, respectively, in the casing for exchanging heat with air to be discharged through the air discharge openings. Further, at least one of the air discharge openings is located at a lower portion of the casing in the vicinity of the ground for discharging air near the ground. By discharging cold air from an upper side during the cooling operation and hot air from a lower side during the heating operation, the cold air or the hot air can be evenly distributed to the room. Accordingly, uniform cooling/heating can be realized to thereby significantly increase reliability and efficiency of a product.

Abstract: A distillation system and method for recovering acetic acid from a feed stream containing acetic acid and water stream generated during terephthalic acid production. The invention includes a dehydration column utilizing azeotropic distillation to recover the acetic acid in conjunction with a condenser system to recover the energy.

Abstract: Disclosed is a method for controlling a solenoid valve of an air-conditioner capable of reducing power consumption of an air-conditioner. To this end, in the method for controlling the solenoid valve of the air-conditioner, when at least one compressor of the air-conditioner temporarily stops operating, power is applied to a solenoid valve connected to the compressor for a preset time.

Abstract: An indoor unit of an air conditioner, includes a blower fan disposed within a casing; and a heat exchanger for heat-exchanging between refrigerant and air flowing by the blower fan, said heat exchanger connected to a refrigerant inlet pipe for introducing refrigerant and a refrigerant outlet pipe for discharging a refrigerant, wherein the refrigerant inlet pipe is connected to a side of the heat exchanger, where a flow velocity of the air passing through the heat exchanger is relatively high. Accordingly, efficiency of heat exchange between the indoor air and refrigerant can be improved, and thus cooling and heating efficiency of the indoor air is improved, thereby improving performance of the air conditioner. Also, by reducing the operation time of the air conditioner, power consumption can be reduced.

Abstract: A stand-type air conditioner including a casing having at least two air discharge openings and an air suction opening, and a blower fan installed therein. Also included are at least two heat exchangers positioned adjacent to the air discharge openings, respectively, in the casing for exchanging heat with air to be discharged through the air discharge openings. Further, at least one of the air discharge openings is located at a lower portion of the casing in the vicinity of the ground for discharging air near the ground. By discharging cold air from an upper side during the cooling operation and hot air from a lower side during the heating operation, the cold air or the hot air can be evenly distributed to the room. Accordingly, uniform cooling/heating can be realized to thereby significantly increase reliability and efficiency of a product.

Abstract: An air-conditioner includes a small-capacity compressor and a large-capacity compressor for compressing a refrigerant to a high temperature high pressure gaseous refrigerant; a valve for connecting a suction opening of a refrigerant channel of the large-capacity compressor and a discharge passage of a refrigerant channel of the large-capacity compressor; and a controller for controlling the small-capacity compressor, the large-capacity compressor and the valve.

Abstract: An apparatus for controlling operation of an air conditioner having a compressor for compressing refrigerant and a heat exchanger for heat-exchanging refrigerant with ambient air, includes a temperature sensor installed on a passage through which refrigerant passes, for detecting a temperature of refrigerant; and a control unit connected to the temperature sensor, for controlling the operation of the compressor in response to the temperature detected by the temperature sensor. Accordingly, an overload of the compressor is determined on the basis of a temperature of refrigerant, which is detected by the temperature sensor, so that an effective compressor overload response can be made.

Abstract: Provided is a defrosting method for an air conditioner capable of improving an efficiency of a heating mode by supplying the heating mode to a user as long as possible in a condition that a frost deposit is hardly generated. For this purpose, the defrosting method for the air conditioner comprises the steps of; establishing a defrosting initiation temperature of the air conditioner; and performing the defrosting operation based on the established defrosting initiation temperature.

Abstract: A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operation load and an operation frequency of the first compressor is a maximum frequency of the first compressor, a second compressor is operated; and a step in which when the operation load is reduced, if the outputted compressing capacity of the air-conditioner is greater than the compressing capacity corresponding to the operation load and the operation frequency of the first compressor is a minimum frequency of the first compressor, the second compressor is stopped.

Abstract: Disclosed are an air conditioning system, in which the total operating capacity of compressors is variably controlled in accordance with a cooling or heating load in a room, and a method for controlling the air conditioning method, thus improving comfortableness in the room, reducing an electric power consumption rate, and increasing cooling or heating efficiency. The air conditioning system includes an indoor heat exchanger for cooling a room by heat-exchanging a refrigerant with air in the room; an outdoor heat exchanger for condensing the refrigerant; a plurality of compressors for compressing the refrigerant; and a control unit for controlling operation of the plural compressors in accordance with the cooling or heating load in the room.

Abstract: Disclosed is a method for operating a plurality of compressors of an air conditioner in accordance with a cooling or heating load in a room, in which a power supply unit for supplying power to the compressors is protected when a cooling or heating load in a room is the highest grade. The method comprises the steps of: (a) determining the cooling or heating load in the room; and (b) sequentially operating the plural compressors when it is determined as a result of the step (a) that the cooling or heating load in the room is in the highest grade.

Abstract: Disclosed are an air conditioning system, in which the total operating capacity of compressors is variably controlled in accordance with a cooling or heating load in a room, and a method for controlling the air conditioning method, thus improving comfortableness in the room, reducing an electric power consumption rate, and increasing cooling or heating efficiency. The air conditioning system includes an indoor heat exchanger for cooling a room by heat-exchanging a refrigerant with air in the room; an outdoor heat exchanger for condensing the refrigerant; a plurality of compressors for compressing the refrigerant; and a control unit for controlling operation of the plural compressors in accordance with the cooling or heating load in the room.