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Nonflammable mixed refrigerants (MR) for use with very low temperature throttle-cycle refrigeration systems

A low-temperature refrigeration system and refrigeration system technology, applied in 04] to provide a temperature lower than 223, respectively forming the first and second expansion airflow, 501 field, can solve the problem of complex requirements

Inactive Publication Date: 2009-04-29
EDWARDS VACUUM LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

this further complicates this requirement as a deep cryogenic system must operate in several different modes
Even the start-up of these systems can be challenging since many refrigerants that are liquid at steady state are in the gaseous state when the system is at room temperature

Method used

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  • Nonflammable mixed refrigerants (MR) for use with very low temperature throttle-cycle refrigeration systems
  • Nonflammable mixed refrigerants (MR) for use with very low temperature throttle-cycle refrigeration systems
  • Nonflammable mixed refrigerants (MR) for use with very low temperature throttle-cycle refrigeration systems

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Embodiment Construction

[0068] In the first embodiment, figure 1Shown is a deep cryogenic refrigeration system 100 employing the mixed refrigerants of the present invention. Refrigeration system 100 is a deep cryogenic refrigeration system comprising: a compressor 102 connected to an optional oil separator 124 connected to the condenser via a discharge line 106 104 on. A second outlet of oil separator 124 is connected back to compressor suction line 122 via oil return line 130 at the junction between refrigeration process 108 and compressor 102 . Condenser 104 is connected to the supply inlet of refrigeration process 108 via liquid line 110 . The supply inlet of refrigeration process 108 is connected to the inlet of evaporator 112 via refrigerant supply line 114 . In the refrigerant supply line 114 between the refrigeration process 108 and the evaporator 112 there is a flow modulating device (FMD) 116 which in turn is connected to a solenoid valve 118 . The outlet of the evaporator 112 is in tur...

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Abstract

Refrigerants containing HCFC's are replaced with new blends by using R-236fa and R-125, or R-125 with R-245fa, or R-236ea, or R-134a with R-236fa in place of HCFC's. No hardware or oil composition changes are required to maintain temperatures, pressures and capacity substantially unchanged in a refrigeration system.

Description

[0001] This application claims the benefit of priority to earlier filed and now pending provisional application Ser. Patent Application No. 09 / 728501 is hereby incorporated by reference into this application. Background technique [0002] The invention relates to a non-toxic, fluorine-free and non-flammable refrigerant mixture, which is used in a deep low-temperature refrigeration system. [0003] Refrigeration systems have been around since 1900-1910, when airtight and reliable refrigeration systems were developed. Since then, improvements in refrigeration technology have proven useful in both domestic and industrial applications. In particular, cryogenic refrigeration systems currently provide essential industrial functionality for biomedical applications, cryogenic electronics, coating operations, and semiconductor manufacturing applications. [0004] Providing refrigeration at temperatures below 223K (-50°C) has very important uses, especially in industrial manufacturing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00C09K5/00C09K5/04C09K5/08F25B9/00F25B39/02F25B41/04F25D31/00F28D7/02
CPCC09K2205/13C09K5/045F25B39/02F25B9/006C09K2205/112F25B41/043F25D31/002C09K2205/128F25B2400/16F28D7/024F25B2400/18
Inventor K·P·弗林O·波德特切尼埃夫M·波伊尔斯基V·莫戈里希尼T·V·V·R·阿帕劳B·于丁
Owner EDWARDS VACUUM LLC
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