System and method for controlling air conditioner

Abstract

A system for controlling an air conditioner includes a plurality of outdoor units each having at least one compressor and an outdoor heat exchanger, an indoor unit connected to the outdoor units by a refrigerant tube, the indoor unit having an indoor heat exchanger, and a pressure regulating tube for equalizing pressure according to an operation mode. The pressure regulating tube is connected between the outdoor units.

1 . A system for controlling an air conditioner, comprising:
 a plurality of outdoor units each having at least one compressor and an outdoor heat exchanger;   at least one indoor unit connected to at least one of the outdoor units by a refrigerant tube, the indoor unit having an indoor heat exchanger; and   a pressure regulating tube for equalizing pressure according to an operation mode, the pressure regulating tube being connected to the outdoor units.   
   
   
       2 . The system according to  claim 1 , wherein the pressure regulating tube is varied in a connection location to the outdoor heat exchangers according to the operation mode. 
   
   
       3 . The system according to  claim 1 , wherein the pressure regulating tube is connected between refrigerant tubes extending from rear ends of the heat exchangers where low pressure is formed in a heating mode. 
   
   
       4 . The system according to  claim 1 , wherein the pressure regulating tube is connected between refrigerant tubes extending from front ends of the outdoor heat exchangers where high pressure is formed in a cooling mode. 
   
   
       5 . The system according to  claim 1 , wherein the pressure regulating tube has a diameter less that of the refrigerant tube. 
   
   
       6 . The system according to  claim 1 , wherein the outdoor units comprise first and second outdoor units, the first outdoor unit comprising an inverter compressor and a constant compressor, the second outdoor unit comprising a compressor, the number of compressors of the second outdoor unit being less than that of the first outdoor unit to generate a pressure difference between the heat exchanger of the first outdoor unit and the heat exchanger of the second outdoor unit, the pressure difference being compensated by the pressure regulating tube.