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Environment friendly mixing refrigerant containing DME

A mixed refrigerant, environmentally friendly technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of large slip temperature, poor compatibility of household air conditioning systems, low efficiency, etc., and achieve high cooling efficiency

Inactive Publication Date: 2010-04-21
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] These refrigerant mixtures either have strong flammability, or have a large glide temperature, or are not compatible with existing household air conditioning systems, or have low efficiency, or make the product volume larger and expensive, etc.

Method used

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  • Environment friendly mixing refrigerant containing DME
  • Environment friendly mixing refrigerant containing DME
  • Environment friendly mixing refrigerant containing DME

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: 10% of dimethyl ether (DME), 20% of pentafluoroethane (R125), and 70% of propane (R290) are physically mixed in the liquid phase as a refrigerant by mass percentage .

Embodiment 2

[0038] Example 2: 10% of dimethyl ether (DME), 30% of pentafluoroethane (R125), and 60% of propane (R290) are physically mixed in the liquid phase as a refrigerant by mass percentage .

Embodiment 3

[0039] Example 3: 10% of dimethyl ether (DME), 40% of pentafluoroethane (R125), and 50% of propane (R290) are physically mixed in the liquid phase as a refrigerant by mass percentage .

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Abstract

The invention relates to an environment-friendly mixed refrigerant containing DME. The refrigerant comprises the following compositions in mass percentage: 10 to 20 percent of dimethyl ether, 20 to 45percent of pentafluoroethane and 45 to 70 percent of propane. In the mixed refrigerant provided by the invention, the dimethyl ether, the pentafluoroethane and the propane are subjected to physical mixing under the liquid-phase state according to the corresponding mixture ratio to form the refrigerant for substituting R22 in a domestic air conditioning system. The environment-friendly mixed refrigerant meets the requirement on environmental protection, has safety, reliability and high refrigerating efficiency, does not need to change the prior equipment and the prior production line and can bedirectly filled.

Description

technical field [0001] The invention belongs to the field of refrigerants and relates to a mixed refrigerant, in particular to a mixed refrigerant used in household air conditioning systems to replace R22. Background technique [0002] R22 is a typical CFCs material, non-flammable, non-explosive, excellent refrigeration performance, widely used. [0003] R22 is a typical CFCs substance, which destroys the ozone layer and has a greenhouse effect, so it should be replaced as soon as possible. [0004] R22 is a substance restricted by the Montreal Protocol. Regulations: For developed countries, R22 will be used as a refrigerant up to 2020. In developing countries, R22 will be used as a refrigerant until 2040. [0005] Refrigerant R404A is used to replace R22. R404A is a ternary refrigerant mixture composed of a certain percentage of R125, R143a, and R134a (R125 / 44%, R143a / 52%, R134a / 4%), has a greenhouse effect, and its members are all "Kyoto Protocol" Restricted use of HF...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/04
Inventor 吴江涛毕胜山陈强周永
Owner XI AN JIAOTONG UNIV