Patent ID: 6807816
Filing Date: 2004-10-26
Classification: F25B

Abstract:
An air conditioning system with two compressors, comprising:an air conditioner that conditions air of a room so as to satisfy cooling load via a cooling cycle formed by a refrigerant passing through compressors, a condenser, an expansion valve, and an evaporator; and a control unit that selectively or simultaneously operates the compressors according to a variation of the cooling load so as to variably control a compression capacity of the refrigerant, wherein the control unit comprises: a comparing unit that judges whether the cooling load is heavy or light; a measuring unit that measures an operating time of an operated compressor selected from the two compressors; and a compressor-driving unit that outputs a control signal for selectively or simultaneously operating the compressors according to the variation of the cooling load and the operating time, and wherein the compressor-driving unit outputs a control signal that simultaneously operates all of the compressors when the cooling load is increased or when the operating time of the operated compressor exceeds a predetermined time.