Working medium, composition for heat cycle system, heat cycle device, and heat cycle method

By mixing (E)-1,3,3,3-tetrafluoropropene, (Z)-1-chloro-2,3,3,3-tetrafluoropropene and 1,1,1,2,3,3,3-heptafluoropropane in a specific ratio, the problems of high GWP and high temperature glide of refrigerants are solved, and a working medium with low GWP and low temperature glide is provided, which is suitable for thermal cycle systems.

CN120659857APending Publication Date: 2025-09-16AGC INC
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Patent Information

Application Number
CN202480009277.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-04-21
Filing Date
2024-01-12
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Existing refrigerants have the problems of high global warming potential and large temperature glide, making it difficult to meet the requirements of low GWP and low temperature glide.

Method used

A specific ratio of (E)-1,3,3,3-tetrafluoropropene, (Z)-1-chloro-2,3,3,3-tetrafluoropropene and 1,1,1,2,3,3,3-heptafluoropropane is mixed to form the working medium, and the content of each component is controlled to reduce the GWP and temperature glide.

Benefits of technology

A working medium with low global warming potential and small temperature glide is achieved, which is suitable for heat cycle systems and improves heat exchange efficiency and energy efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

A working medium and an application thereof, the working medium comprising (E)-1, 3, 3, 3-tetrafluoropropene, (Z)-1-chloro-2, 3, 3, 3-tetrafluoropropene and 1, 1, 1, 2, 3, 3, 3-heptafluoropropane, the content of 1, 1, 1, 2, 3, 3, 3-heptafluoropropane being 8.9% by mass or less relative to the total content of (E)-1, 3, 3, 3-tetrafluoropropene, (Z)-1-chloro-2, 3, 3, 3-tetrafluoropropene and 1, 1, 1, 2, 3, 3, 3-heptafluoropropane, the content of (Z)-1-chloro-2, 3, 3, 3-tetrafluoropropene being 8.9% by mass or less relative to the total content of (E)-1, 3, 3, 3-tetrafluoropropene and the content of 1, 1, 1, 3, 3-tetrafluoropropene is 24.5 mass% or less relative to the total content.
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Claims

1. A working medium comprising (E)-1,3,3,3-tetrafluoropropene, (Z)-1-chloro-2,3,3,3-tetrafluoropropene and 1,1,1,2,3,3,3-heptafluoropropane, The content of the 1,1,1,2,3,3,3-heptafluoropropane is 8.9% by mass or less relative to the total content of the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2,3,3,3-heptafluoropropane. The content of the (Z)-1-chloro-2,3,3,3-tetrafluoropropene is 24.5% by mass or less relative to the total content.

2. The working medium according to claim 1, wherein: The total content is 80.0% by mass or more relative to the total amount of the working medium.

3. The working medium according to claim 1, wherein: The content of the 1,1,1,2,3,3,3-heptafluoropropane is 4.4% by mass or less relative to the total content.

4. The working medium according to claim 1, wherein: The content of the (Z)-1-chloro-2,3,3,3-tetrafluoropropene is 15.0% by mass or less relative to the total content. A composition for a thermal cycle system, comprising the working medium according to any one of claims 1 to 4 and refrigeration oil.

6. A thermal cycler comprising: The working medium according to any one of claims 1 to 4; a compressor that compresses the vapor of the working medium; a condenser that cools and liquefies the vapor of the working medium discharged from the compressor; a decompression device for decompressing the working medium discharged from the condenser; an evaporator that heats the working medium discharged from the decompression device, In the evaporator, the evaporation temperature of the working medium is controlled to be -40 to 10°C.

7. The thermal cycler according to claim 6, wherein: In the evaporator, the evaporation temperature of the working medium is controlled to be -25 to 10°C.

8. The thermal cycler according to claim 6, wherein: In the evaporator, the evaporation temperature of the working medium is controlled to be -10 to 10°C.

9. A thermal cycling method, wherein: Compressing the vapor of the working medium according to any one of claims 1 to 4, Cooling and liquefying the vapor of the working medium, Decompressing the liquefied working medium, The decompressed working medium is heated at an evaporation temperature of -40 to 10°C.

Citation Information

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