Refrigerator

Abstract

A refrigerator having a main body cabinet comprising an outside cabinet forming outer appearance and an inside cabinet provided with a filling distance of foaming material inside the outside cabinet and formed with a freezer and a cooler, a freezer evaporator and a cooler evaporator, a freezer fan and a cooler fan ventilating cold air formed from the freezer evaporator and the cooler evaporator toward the freezer and the cooler, includes: a cooler duct forming a cold air pathway between the cooler evaporator and the cooler, and having at least one inlet and an outlet formed at an upper side of the cooler evaporator; an airing duct provided to communicate with the cooler duct and a lower area of the cooler to make the cold air go in and out; wherein the cold air of the cooler is introduced into the cooler evaporator through the inlet and the air duct when the cooler fan turns on, the cold air formed from the cooler evaporator flows out to the cooler via the airing duct when the cooler fan turns off. Thus, cooling capacity is improved as cold air inside a cooler flows smoothly, a peripheral area of the cooler evaporator is prevented from overcooling or freezing, the cool air is periodically inhaled from and discharged to a lower area of a cooler in a cooling cycle, thereby controlling the temperature of the lower area of the refrigerator, and a relatively high temperature part in a lower area of a cooler is efficiently cooled.

1 . A refrigerator having a main body cabinet comprising an outside cabinet forming outer appearance and an inside cabinet provided with a filling distance of foaming material inside the outside cabinet and formed with a freezer and a cooler, a freezer evaporator and a cooler evaporator, a freezer fan and a cooler fan ventilating cold air formed from the freezer evaporator and the cooler evaporator toward the freezer and the cooler, comprising: 
 a cooler duct forming a cold air pathway between the cooler evaporator and the cooler, and having at least one inlet and an outlet formed at an upper side of the cooler evaporator;    an airing duct provided to communicate with the cooler duct and a lower area of the cooler to make the cold air go in and out;    wherein the cold air of the cooler is introduced into the cooler evaporator through the inlet and the air duct when the cooler fan turns on, the cold air formed from the cooler evaporator flows out to the cooler via the airing duct when the cooler fan turns off.    
   
   
       2 . The refrigerator according to  claim 1 , wherein the airing duct is formed in the forming material of the cooler.  
   
   
       3 . The refrigerator according to  claim 1 , wherein the airing duct comprises a duct main body and a plurality of cold air separating plates extended in a lengthwise direction of the duct main body for separating the cold air.  
   
   
       4 . The refrigerator according to  claim 3 , wherein the inside cabinet is formed with a first pass through hole and a second pass through hole respectively connected with the cooler duct and the lower area of the cooler, and the duct main body comprises an upper end side correspondingly coupled with the first pass through hole, a slant part to slope toward the lower area of the cooler to be extended from the upper end side, and a lower end side connected with the slant part and correspondingly coupled with the second pass through hole.  
   
   
       5 . The refrigerator according to  claim 4 , further comprising a drain tray disposed at a lower side of the cooler evaporator, wherein the upper end side of the airing duct slopes in a predetermined angle toward the drain tray.  
   
   
       6 . The refrigerator according to  claim 5 , wherein the main body cabinet is divided into the freezer and the cooler from side to side by a partition, and the airing duct is provided in a lower side opposite to the partition.  
   
   
       7 . The refrigerator according to  claim 1 , wherein the freezer evaporator and the cooler evaporator are connected in series.  
   
   
       8 . The refrigerator according to  claim 1 , further comprising an evaporator partition is provided between the cooler duct and the cooler evaporator to connect the inlet with the lower part of the cooler evaporator, and the cold air introduced through the inlet exchanges heat with the cold air introduced through the airing duct in the cooler evaporator when the cooler operates.  
   
   
       9 . The refrigerator according to  claim 6 , wherein the first pass through hole is placed in a lower part of the cooler evaporator provided in a cooler lateral side opposite to the partition, and the duct main body is extended from the first pass through hole and curved toward the partition.  
   
   
       10 . The refrigerator according to  claim 1 , further comprising a water tank placed in front of the cooler evaporator.  
   
   
       11 . The refrigerator according to  claim 6 , wherein, in the upper end side of the duct main body, a gap between a lateral side of the slant part facing the partition and the cold air separating plate adjacent thereto is narrower than a gap between the lateral side of the slant part opposite to the partition and the cold air separating plate adjacent thereto.  
   
   
       12 . A refrigerator having a main body cabinet comprising an outside cabinet forming appearance and an inside cabinet provided with a filling distance of foaming material inside the outside cabinet and formed with a freezer and a cooler, a freezer evaporator and a cooler evaporator, a freezer fan and a cooler fan ventilating cold air formed from the freezer evaporator and the cooler evaporator toward the freezer and the cooler, comprising: 
 a cooler duct forming a cold air pathway between the cooler evaporator and the cooler and having an inlet introducing the cold air to the cooler evaporator and an outlet formed at an upper side of the cooler evaporator;    an airing duct provided in the foaming material and connected with the cooler duct in a lower area of the cooler to make the cold air go in and out, and having a duct main body and at least one cold air separating plates extended in a lengthwise direction of the duct main body for separating the cold air,    wherein the cold air flows into the cooler evaporator via the airing duct when the cooler operates, and the cold air flows out of the cooler evaporator via the airing duct when the cooler stops operating.    
   
   
       13 . The refrigerator according to  claim 12 , wherein the inside cabinet is formed with a first pass through hole and a second pass through hole respectively connected with the cooler duct and the lower area of the cooler.  
   
   
       14 . The refrigerator according to  claim 13 , wherein the duct main body comprises an upper end part correspondingly coupled to the first pass through hole, a slant part extended from the upper end part and sloping toward a lower area of the cooler, and a lower end part connected with the slant part and correspondingly coupled to the second pass through hole, wherein the first pass through hole connected with the upper end part is placed on a side opposite to the partition of the cooler, and a slant part is curvedly extended from the first pass through hole to the partition.  
   
   
       15 . The refrigerator according to  claim 14 , wherein, in the upper end side of the duct main body, a gap between a lateral side of the slant part facing the partition and the cold air separating plate adjacent thereto is narrower than a gap between the lateral side of the slant part opposite to the partition and the cold air separating plate adjacent thereto.  
   
   
       16 . The refrigerator according to  claim 12 , further comprising a drain tray positioned below the cooler evaporator, 
 wherein an upper end side of the airing duct slopes toward the drain tray.    
   
   
       17 . The refrigerator according to  claim 12 , wherein a distance between each of the plurality of cold air separating varies along a length of the airing duct.  
   
   
       18 . A refrigerator having a main body cabinet comprising an outside cabinet forming appearance and an inside cabinet provided with a filling distance of foaming material inside the outside cabinet and formed with a freezer and a cooler, a freezer evaporator and a cooler evaporator, a freezer fan and a cooler fan ventilating cold air formed from the freezer evaporator and the cooler evaporator toward the freezer and the cooler, comprising: 
 a partition interposed between the cooler and the freezer;    a cooler duct forming a cold air pathway between the cooler evaporator and the cooler and having at least one inlet introducing therethrough cold air from the cooler and an outlet formed at an upper side of the cooler evaporator;    an airing duct provided in the foaming material and connected with the cooler duct in a lower area of the cooler to make the cold air go in and out, and biasedly provided in a side opposite to the partition,    wherein the cold air formed from the cooler evaporator flows out to the cooler via the airing duct when the cooler fan turns off and the freezer fan turns on.    
   
   
       19 . The refrigerator according to  claim 18 , further comprising an evaporator partition interposed between the cooler duct and the cooler evaporator to allow the cold air introduced through the inlet to flow toward the lower area of the cooler evaporator and exchange heat with the cold air introduced through the airing duct in the cooler evaporator.  
   
   
       20 . The refrigerator according to  claim 18 , wherein the airing duct comprises a duct main body having a first end coupled with the inside cabinet of the lower side of the cooler evaporator and a second end coupled with the inside cabinet of the lower area of the cooler; and at least one cold air separating plate formed in the duct main body at a lengthwise direction for separating the cold air.