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R502, r12 or r22 substitute mixed refrigerant and refrigeration system using thereof

A refrigerant and mixture technology, applied in the field of vapor compression refrigerators or air conditioners, can solve the problem of high system pressure, achieve the effects of small slip temperature difference, stable use, and prevention of component separation

Inactive Publication Date: 2007-07-25
咸允植 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this refrigerant are, for example, the need to modify the compressor due to the vapor pressure being 60% higher than conventional HCFC22, and the need to increase the strength of the material for making the condenser due to the high system pressure

Method used

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  • R502, r12 or r22 substitute mixed refrigerant and refrigeration system using thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1～ Embodiment A3

[0058] As shown in Examples A1, A2 and A3 of the present invention, as the content of R1270 increases, the volumetric capacity and compressor discharge temperature of the refrigerant mixture composed of R1270 and R290 increase. Therefore, in order to ensure that the volume capacity is similar to conventional refrigerants, it is preferable that the content of R1270 in the refrigerant mixture does not exceed 55% by weight.

[0059] As shown in Table 2, the refrigerant mixture of Example A2 comprising 30% by weight of R1270 has 841 kJ / m 3 volumetric capacity, while Example A3 containing 70% by weight of R1270 has 945 kJ / m 3 volume capacity. So, compared with 807kJ / m of traditional refrigerant R404A 3 In comparison, inclusion of greater than 70% by weight of R1270 in the refrigerant mixture results in excessive volumetric capacity, requiring replacement of existing refrigeration systems including compressors. Therefore, the content of R1270 is preferably less than 55% by weight...

Embodiment A4～ Embodiment A6

[0065] As shown in Examples A4, A5 and A6 of the present invention, as the content of R1270 decreases and the content of R134a increases, the difference in glide temperature of the refrigerant mixture composed of R1270 and R134a increases and its volumetric capacity decreases. Therefore, in order to obtain a volumetric capacity close to conventional refrigerants, and to minimize the glide temperature difference as much as possible, it is preferable that the content of R1270 in the refrigerant mixture exceeds 30% by weight and the content of R134a does not exceed 70% by weight .

[0066] That is, when the contents of R134a were 10 wt%, 50 wt%, and 70 wt%, the difference in glide temperature increased to 0.0°C, 1.3°C, and 6.3°C, respectively. Therefore, refrigerant mixtures containing more than 70% by weight of R134a have an excessively large glide temperature difference and are thus undesirable. In the case where the difference in glide temperature of the refrigerant mixture i...

Embodiment A7～ Embodiment A9 and Embodiment A17 and Embodiment A18

[0068] Referring to Examples A4, A5, A6, A14, A15 and A16, the refrigerant mixtures of Examples A7, A8, A9 and Examples A17 and A18 of the present invention are investigated. From the results thus obtained, it can be seen that when the R134a content in the refrigerant mixture is greater than 70% by weight, the glide temperature difference is too large, so that the pressures of the evaporator and condenser are continuously changed with the phase transition of the refrigerant mixture . When refrigerant leakage occurs in the refrigeration cycle system, this will undesirably lead to instability and component separation of the refrigeration system. The content of R134a in the refrigerant mixture is preferably less than 70% by weight.

[0069] Embodiment A7 to Embodiment A9

[0070] As shown in Examples A7, A8 and A9 of the present invention, when the content of R1270 in the refrigerant mixture is greater than 30% by weight, its volume capacity is too large, which causes a high pr...

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Abstract

The present invention relates to a refrigerant mixture for substituting R502, R22 or R12 used in a vapor compression refrigerator or air conditioner and a refrigeration system using the same. More specifically, the present invention relates to a refrigerant mixture comprising a combination of two or three components, which is capable of being used without causing ozone layer destruction and global warming and at the same time, without replacement of the existing refrigeration system, wherein the components are selected from the group consisting of propylene, propane, 1,1,1,2-tetrafluoroethane, pentafluoroe thane, 1,1,1-trifluoroethane, 1,1-difluoroethane, dimethylether and isobutane; and a refrigeration system using the same.

Description

technical field [0001] The present invention relates to a refrigerant mixture for replacing R502, R22 or R12 and a refrigerating system using the refrigerant mixture for vapor compression refrigerators or air conditioners. More specifically, the present invention relates to refrigerant mixtures comprising a combination of two or three components selected from the group consisting of propylene, propane, 1,1,1,2-tetrafluoroethane, pentafluoro The group consisting of ethane, 1,1,1-trifluoroethane, 1,1-difluoroethane, dimethyl ether and isobutane, the use of which refrigerant mixtures do not cause ozone depletion and global warming, And it is not necessary to replace the existing refrigeration system; the invention also relates to a refrigeration system using said refrigerant mixture. Background technique [0002] The present invention relates to refrigerant mixtures comprising a selective combination of propylene, propane and R134a which can be used as refrigerants in vapor co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/00C09K5/04C07C9/08C07C19/08F25B1/00
Inventor 咸允植郑惠美
Owner 咸允植
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