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Mixed refrigerant for replacing R507A

A mixed refrigerant, mass percentage technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of low refrigeration performance, weak flammability, and charging volume can not exceed 1.2kg, and achieve the effect of safety guarantee

Active Publication Date: 2021-06-25
YANTAI MOON +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the field of freezing and refrigeration, R507A is a relatively commonly used refrigerant, but it has a high GWP value (GWP value is as high as 3985). requirements, but they all belong to weakly flammable (A2L) mixed refrigerants, and the charging amount cannot exceed 1.2kg, so they can only be used in small equipment such as refrigerators and freezers, while in ordinary cold storage, refrigerated transport vehicles, refrigerated containers, etc. Not available
Although R448A and R449A are non-flammable refrigerants (A1 grade) as substitutes for R507A, their GWP is as high as 1300, and their refrigeration performance is lower than that of R507A.

Method used

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  • Mixed refrigerant for replacing R507A
  • Mixed refrigerant for replacing R507A
  • Mixed refrigerant for replacing R507A

Examples

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preparation example Construction

[0025] The preparation method of the mixed refrigerant of the present invention is to physically mix the four component substances according to their designated mass percentages at normal temperature. The basic physical properties of the four components are shown in Table 1:

[0026] Table 1 The basic parameters of the four components of difluoromethane, 1,3,3,3-tetrafluoroethylene, pentafluoroethane and trifluoroiodomethane include: Tb: normal boiling point, Tc: critical temperature, Pc: critical pressure

[0027]

[0028] Preferably, in terms of mass percentage, it includes 18% to 55% of difluoromethane, 15% to 48% of 1,3,3,3-tetrafluoroethylene, 7% to 18% of pentafluoroethane and 8 %~42% trifluoroiodomethane.

[0029] Preferably, in terms of mass percentage, it includes 30% to 45% of difluoromethane, 15% to 48% of 1,3,3,3-tetrafluoroethylene, 7% to 18% of pentafluoroethane and 8 %~42% trifluoroiodomethane.

[0030] Preferably, in terms of mass percentage, it includes ...

Embodiment 1

[0039] R32 (difluoromethane), R1234yf (1,3,3,3-tetrafluoroethylene), R125 (pentafluoroethane) and R13I1 (trifluoroiodomethane) four components under normal pressure by 10% / The mass percentage of 67% / 20% / 3% is uniformly mixed by general physical method to obtain a mixed refrigerant.

[0040] Assuming that the total mass of the mixed refrigerant is X, multiply X by 10% of R32 (difluoromethane), X by 67% of R1234yf (1,3,3,3-tetrafluoroethylene), and X by 20% The four components of R125 (pentafluoroethane) and X multiplied by 3% of R13I1 (trifluoroiodomethane) are uniformly mixed by general physical methods under normal pressure to obtain a mixed refrigerant. The following expressions are analogous.

[0041] R32 is the code name of the refrigerant difluoromethane, R1234yf is the code name of the refrigerant 1,3,3,3-tetrafluoroethylene, R125 is the code name of the refrigerant pentafluoroethane, and R13I1 is the code name of the refrigerant trifluoroiodomethane.

Embodiment 2

[0043]R32 (difluoromethane), R1234yf (1,3,3,3-tetrafluoroethylene), R125 (pentafluoroethane) and R13I1 (trifluoroiodomethane) four components under normal pressure by 25% / 67% / 5% / 3% by mass, mixed uniformly by general physical methods to obtain a mixed refrigerant.

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Abstract

The invention discloses a mixed refrigerant for replacing R507A, wherein the mixed refrigerant comprises the components in percentage by mass: 10% to 64% of difluoromethane, 1% to 67% of 1,3,3,3-tetrafluoroethylene, 5% to 21% of pentafluoroethane and 3% to 50% of iodotrifluoromethane. The mixed refrigerant disclosed by the invention has a relatively low GWP value and a zero ODP value, can obtain relatively good thermodynamic property parameters, and is good in environmental performance.

Description

technical field [0001] The invention relates to a refrigerant, in particular to a mixed refrigerant replacing R507A. Background technique [0002] At present, global warming has become increasingly serious in recent years. In order to cope with extreme weather changes caused by global warming, the Paris Climate Change Conference at the end of 2015 adopted a new agreement on global change "Paris Agreement", and in 2016, 175 countries formally Signed to make arrangements for the global response to climate change after 2020. In order to reduce greenhouse gas emissions, on October 15, 2016, the 28th Conference of the Parties to the Montreal Protocol, held in Kigali, the capital of Rwanda, reached a historic limit on greenhouse gas hydrofluorocarbons through consensus. (HFCs) Amendment - Kigali Amendment. The timetable for the phase-out of HFCs with high greenhouse effect has been clarified, and it has come into effect in January 2019. [0003] In the field of freezing and ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
CPCC09K5/04
Inventor 杨昭张勇张超张会明温辰阳姜韶明
Owner YANTAI MOON
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