Structure for preventing refrigerant from leaking in heat exchanger and method for forming the same

Abstract

Disclosed is a refrigerant leak-preventive structure in a heat exchanger. The refrigerant leak-preventive structure comprises: a fin-tubes group having refrigerant leak-preventive grooves recessed at ends of the fin-tubes group; and headers having refrigerant leak-preventive projections formed by double injection molding solution introduced into and cooled in the refrigerant leak-preventive grooves when being coupled with the both ends of the fin-tubes group by a double injection molding.

What is claimed is:  
     
         1 . A refrigerant leak-preventive structure in a heat exchanger which includes a plastic fin-tubes group and plastic headers combined with the fin-tubes group by a double injection molding, the structure comprising: 
 refrigerant leak-preventive grooves formed at least on outer peripheries of both ends of the fin-tubes group through which refrigerant flows, and for preventing leak of the refrigerant between the fin-tubes group and the headers when the refrigerant pressurized by a compressor is introduced into the heat exchanger; and    refrigerant leak-preventive projections formed by an injection molding solution of the headers introduced into and cooled in the refrigerant leak-preventive grooves during a double injection molding of the headers, and correspondingly engaged with the refrigerant leak-preventive grooves.    
     
     
         2 . The refrigerant leak-preventive structure according to  claim 1 , wherein the refrigerant leak-preventive grooves are a spiral shape.  
     
     
         3 . The refrigerant leak-preventive structure according to  claim 1 , wherein the refrigerant leak-preventive grooves are a circular shape.  
     
     
         4 . The refrigerant leak-preventive structure according to  claim 1 , wherein the heat exchanger is an evaporator of a refrigerator.  
     
     
         5 . A refrigerant leak-preventive method in a heat exchanger, the method comprising the steps of: 
 forming refrigerant leak-preventive grooves on outer peripheries of both ends of a fin-tubes group; and    double injection-molding headers at the both ends of the fin-tubes group.    
     
     
         6 . The refrigerant leak prevention method according to  claim 5 , further comprising the step of: thermally fusing the fin-tubes group and the headers with a jig and a heating source after the fin-tubes group is double injection-molded.  
     
     
         7 . The refrigerant leak prevention method according to  claim 5 , wherein the refrigerant leak-preventive grooves are formed on outer peripheries of refrigerant tubes.  
     
     
         8 . The refrigerant leak prevention method according to  claim 5 , the step of double injection-molding the headers comprises the step of: impregnating the injection molding solution into the refrigerant leak-preventive grooves to form the refrigerant leak-preventive projections.  
     
     
         9 . A refrigerant leak-preventive structure in a heat exchanger, the structure comprising: 
 a fin-tubes group including refrigerant leak-preventive grooves which are recessed at ends of the fin-tubes group; and    headers coupled at and with both ends of the fin-tubes group by a double injection molding, and including refrigerant leak-preventive projections which are formed by impregnating an injection molding solution into the refrigerant leak-preventive grooves.    
     
     
         10 . The refrigerant leak-preventive structure according to  claim 9 , wherein the heat exchanger is a condenser of a refrigerator.  
     
     
         11 . The refrigerant leak-preventive structure according to  claim 9 , wherein the refrigerant leak-preventive grooves are a spiral shape.  
     
     
         12 . The refrigerant leak-preventive structure according to  claim 9 , wherein the refrigerant leak-preventive grooves are a circular shape.  
     
     
         13 . The refrigerant leak-preventive structure according to  claim 9 , wherein the refrigerant leak-preventive grooves are repeatedly formed with a same shape.  
     
     
         14 . The refrigerant leak-preventive structure according to  claim 9 , wherein the refrigerant leak-preventive grooves are formed on outer peripheries of refrigerant tubes of the fin-tubes group.  
     
     
         15 . The refrigerant leak-preventive structure according to  claim 9 , wherein the refrigerant leak-preventive grooves are formed on refrigerant tubes.