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 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.

Abstract: Disclosed is 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. The dehydration column operates with a pressure of at least 1.2 kg/cm2 abs. or higher pressure at the top of the column. The condenser system is a steam generator that condenses the vapor into a concentrated acetic acid stream while generating a low pressure steam of 0.6-2.0 kg/cm abs.