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Low-flammability heat exchange medium and heat exchange system

A technology of heat exchange medium and heat exchange system, applied in the field of heat exchange medium, can solve problems such as weak flammability, and achieve the effect of good environmental protection performance

Active Publication Date: 2020-02-21
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volumetric cooling capacity of R1234yf is about 93% of the volumetric cooling capacity of R134a, which can replace R134a in terms of GWP and performance, but the only regret is that it has weak flammability

Method used

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  • Low-flammability heat exchange medium and heat exchange system
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preparation example Construction

[0032] The preparation method of a low flammability heat exchange medium of the present invention is: the first step: 1,1,1,2,3,3,3-heptafluoropropane (R227ea), 1,1,1,2-tetrafluoropropane Fluoroethane (R134a), 1,1-difluoroethane (R152a) and trans 1,3,3,3-tetrafluoropropene (R1234ze(E)) or 2,3,3,3-tetrafluoropropene (R1234yf) and other substances are combined, the preferred combination method and mass proportion are listed in Table 1:

[0033] Table 1 Combination mode and mass proportion of heat exchange medium

[0034]

[0035] Considering that the relative volumetric refrigeration capacity of the heat exchange medium is greater than 0.8, the further preferred combination and mass ratio are shown in Table 2:

[0036] Table 2 Combination mode and mass proportion of heat exchange medium

[0037]

[0038]

[0039] Considering that the relative volumetric refrigeration capacity of the heat exchange medium is greater than 0.88, the further preferred combination and mass ...

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Abstract

The invention provides a low-flammability heat exchange medium, which comprises, by mass, 1-17% of a first component, 1-43% of a second component, 1-76% of a third component and 8-83% of a fourth component, wherein the first component is 1,1,1,2,3,3,3-heptafluoropropane (R227ea), the second component is 1,1,1,2-tetrafluoroethane (R134a), the third component is 1,1-difluoroethane (R152a), and the fourth component is one selected from trans 1,3,3,3-tetrafluoropropene (R1234ze (E)) and 2,3,3,3-tetrafluoropropene (R1234yf). According to the invention, the GWP of the heat exchange medium is smallerthan or equal to 600, the ODP is 0, and the heat exchange medium has low flammability or incombustibility, and can solve the problems of weak flammability of the existing heat exchange medium capableof replacing R134a and low system refrigerating capacity.

Description

technical field [0001] The invention relates to a heat exchange medium technology, in particular to a low flammability heat exchange medium and a heat exchange system. Background technique [0002] With the increasingly serious trend of environmental protection, for the "greenhouse effect" of HFCs, the amendment to the Montreal Protocol requires a heat exchange medium that does not destroy the ozone layer and has a lower GWP value to replace the current high GWP heat exchange medium, and is effectively used in in the air conditioning system. At present, R134a refrigerant has a GWP of 1300 and an ODP of 0. It is often used in centrifugal chillers, automotive air conditioners, screw units, and refrigeration. It is necessary to find low-GWP working fluids to replace. The volumetric cooling capacity of R1234yf is about 93% of the volumetric cooling capacity of R134a, which can replace R134a in terms of GWP and performance, but the only regret is that it has weak flammability. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04F25B1/053
CPCC09K5/045C09K2205/122C09K2205/126C09K2205/22C09K2205/40F25B1/053
Inventor 于艳翠赵桓梁尤轩雷佩玉黄宇杰
Owner GREE ELECTRIC APPLIANCES INC