US2005072957A1PendingUtilityA1

Non-HCFC refrigerant mixture for an ultra-low temperature refrigeration system

42
Priority: Nov 27, 2002Filed: Aug 19, 2003Published: Apr 7, 2005
Est. expiryNov 27, 2022(expired)· nominal 20-yr term from priority
Inventors:Chuan Weng
C09K 2205/12C09K 2205/13F25B 2400/23F25B 9/006
42
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Claims

Abstract

Methods and apparatus for a refrigeration heat exchanger section useful in circulating a substantially non-HCFC refrigerant mixture which comprises: a compressor means, an auxiliary condenser, a first condenser, a second condenser, a third condenser, a subcooler and a liquid/gas separator, wherein a subcooled refrigerant liquid mixture taken as bottoms from the liquid/gas separator is distributed and expanded by a first expansion means and a second expansion means to form first and second expanded streams, respectively, such that the first expanded stream is returned to the auxiliary condenser and compressor in order to avoid overheating of the compressor.

Claims

exact text as granted — not AI-modified
1 . A method of creating a non-hydrochlorofluorocarbon refrigerant mixture, capable of providing temperatures as low as about −150° C., comprising the steps of: 
 adding non-hydrochlorofluorocarbon refrigerants to refrigerant R740.    
     
     
         2 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         3 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         4 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    R50;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         5 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    R50;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         6 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R134a, R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         7 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consists of: 
 R14;    R50;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R134a, R152a and R290; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         8 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consists of: 
 R50;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R134a, R152a and R290; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         9 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         10 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consists of: 
 R14;    R50;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         11 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         12 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         13 . The refrigerant mixture of  claim 1 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         14 . A non-hydrochlorofluorocarbon refrigerant mixture for use in a refrigeration system capable of providing temperatures as low as about −150° C., consisting of: 
 R740 and at least four non-hydrochlorofluorocarbon refrigerants.    
     
     
         15 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         16 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         17 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    R50;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         18 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    R50;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         19 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R134a, R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         20 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    R50;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R134a, R152a and R290; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         21 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R134a, R152a and R290; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         22 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         23 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    R50;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         24 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R14;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         25 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R134a; R152a and R290;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         26 . The refrigerant mixture according to  claim 14 , wherein said non-hydrochlorofluorocarbon refrigerants consist of: 
 R50;    any one refrigerant from the group consisting of R227ea, R236fa, RC318, R600 and R600a;    any one refrigerant from the group consisting of R236ea, R245ca and R245fa; and    any one refrigerant from the group consisting of R23, R116, R170, R508a, R508b and R1150.    
     
     
         27 . (Cancelled)  
     
     
         28 . (Cancelled)  
     
     
         29 . (Cancelled)  
     
     
         30 . (Cancelled)  
     
     
         31 . (Cancelled)  
     
     
         32 . (Cancelled)  
     
     
         33 . (Cancelled)  
     
     
         34 . (Cancelled)  
     
     
         35 . (Cancelled)  
     
     
         36 . (Cancelled)  
     
     
         37 . (Cancelled)  
     
     
         38 . (Cancelled)  
     
     
         39 . (Cancelled)

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