Refrigerating system for refrigerator

Abstract

Refrigerating system for a refrigerator including a variable capacity compressor having a varied rate of compressed refrigerant delivery for compressing refrigerant, a condenser for condensing the refrigerant compressed by the variable capacity compressor, a freezing chamber expansion valve for expanding condensed refrigerant, a freezing chamber evaporator for cooling air by using the refrigerant supplied from the freezing chamber expansion valve, two or more than two refrigerating chamber expansion valves having different lengths of refrigerant flow passages, for expanding the condensed refrigerant, two or more than two refrigerating chamber evaporators having different lengths of refrigerant flow passages, for cooing air by using the refrigerant from the refrigerating chamber expansion valves, respectively, and a distributor between the condenser and the expansion valves for selective supply of the refrigerant to the expansion valves according to an operation time period of the refrigerating system, thereby providing a refrigerating system for a refrigerator having a high efficiency.

1 . A refrigerating system for a refrigerator comprising: 
 a variable capacity compressor having a varied rate of compressed refrigerant delivery for compressing refrigerant;    a condenser for condensing the refrigerant compressed by the variable capacity compressor;    a freezing chamber expansion valve for expanding condensed refrigerant;    a freezing chamber evaporator for cooling air by using the refrigerant supplied from the freezing-chamber expansion valve;    two or more than two refrigerating chamber expansion valves having different lengths of refrigerant flow passages, for expanding the condensed refrigerant;    two or more than two refrigerating chamber evaporators having different lengths of refrigerant flow passages, for cooing air by using the refrigerant from the refrigerating chamber expansion valves, respectively; and    a distributor between the condenser and the expansion valves for selective supply of the refrigerant to the expansion valves according to an operation time period of the refrigerating system.    
   
   
       2 . The refrigerating system as claimed in  claim 1 , wherein the refrigerating chamber expansion valve includes; 
 a first refrigerating chamber expansion valve having a relatively short refrigerant flow passage, and    a second refrigerating chamber expansion valve having a relatively long refrigerant flow passage.    
   
   
       3 . The refrigerating system as claimed in  claim 1 , further comprising a guide valve for selective supply of the refrigerant to one of the refrigerating chamber expansion valves.  
   
   
       4 . The refrigerating system as claimed in  claim 1 , wherein the refrigerating chamber evaporator includes; 
 a first refrigerating chamber evaporator having a relatively long refrigerant flow passage, and    a second refrigerating chamber evaporator having a relatively short refrigerant flow passage.    
   
   
       5 . The refrigerating system as claimed in  claim 4 , further comprising a bypass valve at an inlet of the second refrigerating chamber evaporator for selective supply of the refrigerant passed through the first refrigerating chamber evaporator to the second refrigerating chamber evaporator.  
   
   
       6 . The refrigerating system as claimed in  claim 1 , wherein the expansion valves and the evaporators are configured to form a relatively short refrigerant flow passage when the refrigerating system is put into operation.  
   
   
       7 . The refrigerating system as claimed in  claim 1 , wherein the variable capacity compressor has a relatively high rate of compressed refrigerant delivery when the refrigerating system starts operation.  
   
   
       8 . The refrigerating system as claimed in  claim 1 , wherein the distributor supplies the refrigerant only to the freezing chamber expansion valve and the freezing chamber evaporator when the refrigerating system starts operation.  
   
   
       9 . The refrigerating system as claimed in  claim 8 , wherein the refrigerant is supplied to the refrigerating chamber expansion valve having the relatively short flow passage through the distributor additionally when the refrigerating system starts operation.  
   
   
       10 . The refrigerating system as claimed in  claim 1 , wherein the expansion valves and the evaporators are configured to form a relatively longer refrigerant flow passage than the refrigerant flow passage at the time of starting the refrigerating system when a preset time period is passed after starting of the refrigerating system.  
   
   
       11 . The refrigerating system as claimed in  claim 1 , wherein the variable capacity compressor has a relatively low rate of compressed refrigerant delivery when the preset time period is passed after starting of the refrigerating system.  
   
   
       12 . The refrigerating system as claimed in  claim 1 , wherein the refrigerant is supplied to the freezing chamber expansion valve and the refrigerating chamber expansion valve having the relatively long flow passage through the distributor when the preset time period is passed after starting of the refrigerating system.  
   
   
       13 . The refrigerating system as claimed in  claim 1 , wherein the refrigerant is supplied to all of the refrigerating chamber evaporators when a preset time period is passed after starting of the refrigerating system.