Claims
- 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 non-hydrochlorofluorocarbon refrigerant mixture of claim 1, comprises:
R14; R134a; any one refrigerant from the group consisting of R600 and R600a; and any one refrigerant from the group consisting of R508a and R508b.
- 3. The refrigerant mixture of claim 2, wherein said refrigerant R740 is about 16.5% by volume of the mixture.
- 4. The refrigerant mixture of claim 3, wherein said refrigerant R14 is about 19.3% by volume of the mixture.
- 5. The refrigerant mixture of claim 4, wherein said refrigerant R134a is about 20% by volume of the mixture.
- 6. The refrigerant mixture of claim 5, wherein said any one refrigerant from the group consisting of R508a and R508b is about 22% by volume of the mixture.
- 7. The refrigerant mixture of claim 6, wherein said any one refrigerant from the group consisting of R600 and R600a is about 22% by volume of the mixture.
- 8. The refrigerant mixture of claim 2, wherein said refrigerant R740 is about 13.5 to 16.5 ounces of the mixture.
- 9. The refrigerant mixture of claim 8, wherein said refrigerant R14 is about 15.7 to 19.3 ounces of the mixture.
- 10. The refrigerant mixture of claim 9, wherein said refrigerant R134a is about 20 ounces of the mixture.
- 11. The refrigerant mixture of claim 10, wherein said any one refrigerant from the group consisting of R508a and R508b is about 18 to 22 ounces of the mixture.
- 12. The refrigerant mixture of claim 11, wherein said any one refrigerant from the group consisting of R600 and R600a is about 22 ounces of the mixture.
- 13. A non-hydrochlorofluorocarbon refrigerant mixture for use in a refrigeration system capable of providing temperatures as low as about −150° C., comprising:
R740 and at least four non-hydrochlorofluorocarbon refrigerants.
- 14. The non-hydrochlorofluorocarbon refrigerant mixture according to claim 13, comprises:
R14; R134a; any one refrigerant from the group consisting of R600 and R600a; and any one refrigerant from the group consisting of R508a and R508b.
- 15. The refrigerant mixture of claim 14, wherein said refrigerant R740 is about 16.5% by volume of the mixture.
- 16. The refrigerant mixture of claim 15, wherein said refrigerant R14 is about 19.3% by volume of the mixture.
- 17. The refrigerant mixture of claim 16, wherein said refrigerant R134a is about 20% by volume of the mixture.
- 18. The refrigerant mixture of claim 17, wherein said any one refrigerant from the group consisting of R508a and R508b is about 22% by volume of the mixture.
- 19. The refrigerant mixture of claim 18, wherein said any one refrigerant from the group consisting of R600 and R600a is about 22% by volume of the mixture.
- 20. The refrigerant mixture of claim 14, wherein said refrigerant R740 is about 13.5 to 16.5 ounces of the mixture.
- 21. The refrigerant mixture of claim 20, wherein said refrigerant R14 is about 15.7 to 19.3 ounces of the mixture.
- 22. The refrigerant mixture of claim 21, wherein said refrigerant R134a is about 20 ounces of the mixture.
- 23. The refrigerant mixture of claim 22, wherein said any one refrigerant from the group consisting of R508a and R508b is about 18 to 22 ounces of the mixture.
- 24. The refrigerant mixture of claim 23, wherein said any one refrigerant from the group consisting of R600 and R600a is about 22 ounces of the mixture.
- 25. A refrigeration heat exchanger section useful in circulating a non-hydrochlorofluorocarbon refrigerant mixture which comprises: a compressor means, an auxiliary condenser connected to said compressor means, a liquid/gas separator connected to said auxiliary condenser, a first condenser connected to said liquid/gas separator, a second condenser connected to said first condenser, a third condenser connected to said second condenser, and a subcooler means connected to said third condenser, wherein the improvement is characterized by:
a means for distributing a subcooled non-hydrochlorofluorocarbon refrigerant liquid mixture from said liquid/gas separator to a first expansion means and a second expansion means for forming first and second expanded streams, respectively; a first conduit means for returning said first expanded stream to said auxiliary condenser and said compressor; and a second conduit means for delivering said second expanded stream to said first condenser, wherein said liquid/gas separator is a brazed plate heat exchanger.
- 26. The refrigeration heat exchanger section according to claim 25, wherein said non-hydrochlorofluorocarbon refrigerant mixture comprises:
R14; R134a; R740; any one refrigerant from the group consisting of R600 and R600a; and any one refrigerant from the group consisting of R508a and R508b.
- 27. The refrigerant mixture of claim 26, wherein said refrigerant R740 is about 16.5% by volume of the mixture.
- 28. The refrigerant mixture of claim 27, wherein said refrigerant R14 is about 19.3% by volume of the mixture.
- 29. The refrigerant mixture of claim 28, wherein said refrigerant R134a is about 20% by volume of the mixture.
- 30. The refrigerant mixture of claim 29, wherein said any one refrigerant from the group consisting of R508a and R508b is about 22% by volume of the mixture.
- 31. The refrigerant mixture of claim 30, wherein said any one refrigerant from the group consisting of R600 and R600a is about 22% by volume of the mixture.
- 32. The refrigerant mixture of claim 26, wherein said refrigerant R740 is about 13.5 to 16.5 ounces of the mixture.
- 33. The refrigerant mixture of claim 32, wherein said refrigerant R14 is about 15.7 to 19.3 ounces of the mixture.
- 34. The refrigerant mixture of claim 33, wherein said refrigerant R134a is about 20 ounces of the mixture.
- 35. The refrigerant mixture of claim 34, wherein said any one refrigerant from the group consisting of R508a and R508b is about 18 to 22 ounces of the mixture.
- 36. The refrigerant mixture of claim 35, wherein said any one refrigerant from the group consisting of R600 and R600a is about 22 ounces of the mixture.
Parent Case Info
[0001] This application is a continuation-in-part, and claims the benefit of, U.S. patent application Ser. No. 10/305,188, filed Nov. 27, 2002, entitled NON-HCFC REFRIGERANT MIXTURE FOR AN ULTRA-LOW TEMPERATURE REFRIGERATION SYSTEM the disclosure of which is incorporated herein by reference.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10305188 |
Nov 2002 |
US |
Child |
10682723 |
Oct 2003 |
US |