Driving controlling apparatus for air conditioner having plural compressors and method thereof

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.

1 . A driving controlling apparatus for an air conditioner having a plurality of compressors, comprising: 
 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.    
     
     
         2 . The apparatus of  claim 1 , wherein the flow amount distribution resistor is installed at a flow path diverged from a refrigerant path positioned at the outlet of the expansion valve.  
     
     
         3 . The apparatus of  claim 1 , further comprising a switching unit installed at the outlet of the flow amount distribution resistor and switched by a control signal, for controlling a flow of a refrigerant discharged from the flow amount distribution resistor.  
     
     
         4 . The apparatus of  claim 1 , further comprising a condenser heat exchanging unit for lowering a temperature of a condenser by using a refrigerant introduced through the switching unit, and introducing the refrigerant into an accumulator.  
     
     
         5 . The apparatus of  claim 1 , wherein when the compressors are driven in a maximum capacity driving mode, the controlling unit turns off the switching unit so as to shield a refrigerant flow to the condenser heat exchanging unit, and thereby introduces a refrigerant discharged from the expansion valve to an evaporator.  
     
     
         6 . The apparatus of  claim 1 , wherein when the compressors are driven in a minimum capacity driving mode (or an over-load driving mode), the controlling unit turns on the switching unit thereby to partially introduce a refrigerant discharged from the expansion valve to the condenser heat exchanging unit via the flow amount distribution resistor.  
     
     
         7 . The apparatus of  claim 1 , wherein the flow amount distribution resistor has a preset resistance value for passing an optimum refrigerant.  
     
     
         8 . The apparatus of  claim 4 , wherein the condenser heat exchanging unit lowers a temperature of the condenser by a double tube heat exchanging method.  
     
     
         9 . The apparatus of  claim 4 , wherein the condenser heat exchanging unit lowers a temperature of the condenser by a capillary tube heat exchanging method.  
     
     
         10 . A driving controlling apparatus for an air conditioner having a plurality of compressors, comprising: 
 a flow amount distribution resistor installed at an outlet of an expansion valve, for passing a certain amount of refrigerant;    a switching unit installed at an outlet of the flow amount distribution and switched by a control signal, for controlling a flow of a refrigerant discharged from the flow amount distribution resistor;    a condenser heat exchanging unit for lowering a temperature of a condenser by using a refrigerant introduced through the switching unit, and introducing the refrigerant into an accumulator; and    a controlling unit for detecting a current load, selecting a compressor driving capacity based on the detected load, and outputting a control signal so as to control the switching unit based on the selected driving mode.    
     
     
         11 . The apparatus of  claim 10 , wherein the flow amount distribution resistor is installed at a flow path diverged from a refrigerant path positioned at the outlet of the expansion valve.  
     
     
         12 . The apparatus of  claim 10 , wherein when the compressors are driven in a maximum capacity driving mode, the controlling unit turns off the switching unit so as to shield a refrigerant flow to the condenser heat exchanging unit, and thereby introduces a refrigerant discharged from the expansion valve to an evaporator.  
     
     
         13 . The apparatus of  claim 1 , wherein when the compressors are driven in a minimum capacity driving mode (or an over-load driving mode), the controlling unit turns on the switching unit thereby to partially introduce a refrigerant discharged from the expansion valve to the condenser heat exchanging unit via the flow amount distribution resistor.  
     
     
         14 . The apparatus of  claim 10 , wherein the flow amount distribution resistor has a preset resistance value for passing an optimum refrigerant.  
     
     
         15 . The apparatus of  claim 10 , wherein the condenser heat exchanging unit lowers a temperature of the condenser by a double tube heat exchanging method.  
     
     
         16 . The apparatus of  claim 10 , wherein the condenser heat exchanging unit lowers a temperature of the condenser by a capillary tube heat exchanging method.  
     
     
         17 . A driving controlling method for an air conditioner having a plurality of compressors, comprising: 
 detecting a current load and selecting a compressor driving capacity based on the detected load; and    analyzing the compressor driving capacity, and lowering a temperature of a condenser by using a certain amount of refrigerant based on the analyzed result.    
     
     
         18 . The method of  claim 17 , wherein the step of lowering a temperature of a condenser comprises introducing a refrigerant discharged from the expansion valve into an evaporator when the compressors are driven in a maximum capacity driving mode.  
     
     
         19 . The method of  claim 17 , wherein the step of lowering a temperature of a condenser comprises partially introducing a refrigerant discharged from the expansion valve into the condenser heat exchanging unit via the flow amount distribution resistor when the compressors are driven in a minimum capacity driving mode.  
     
     
         20 . The method of  claim 17 , wherein the step of lowering a temperature of a condenser comprises lowering a temperature of the condenser by the condenser heat exchanging unit with a capillary tube heat exchanging method.  
     
     
         21 . The method of  claim 17 , wherein the step of lowering a temperature of a condenser comprises lowering a temperature of the condenser by the condenser heat exchanging unit with a double tube heat exchanging method.