Coolant

A refrigerant and cooling device technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of inability to achieve high temperature stability, partial shift of azeotropic refrigerant dew point temperature, low cooling capacity, etc.
CN111662685APending Publication Date: 2020-09-15WEISS UMWELTTECHNIK GMBH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WEISS UMWELTTECHNIK GMBH
Publication Date
2020-09-15

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Abstract

The invention relates to a refrigerant for a cooling device, a test chamber for conditioning air, and a use of the refrigerant for conditioning air in a test space of the test chamber. The cooling device comprises a cooling circuit with at least one heat exchanger, the refrigerant undergoing a phase transition in the heat exchanger, the refrigerant being a refrigerant mixture composed of a mass fraction of carbon dioxide (CO2), a mass fraction of difluoromethane (CH2F2) and a mass fraction of at least one other component, wherein the mass fraction of carbon dioxide in the refrigerant mixture is 5 to 65 mass percent, the mass fraction of difluoromethane being up to 68 mass percent, the other component being trifluoroiodomethane (CF3I), fluoromethane (CH3F), ethane (C2H6), 1,1-difluoroethene(C2H2F2), ethene (C2H4), fluoroethene (C2H3F), ethyne (C2H2), propane (C3H8), propene (C3H6) and / or fluoroethane (CH2FCH3), the mass fraction being up to 55 mass percent.
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Description

technical field

[0001] The invention relates to a refrigerant for cooling devices and to a test chamber with the refrigerant and to the use of the refrigerant for conditioning the air in the test space of the test chamber. Background technique

[0002] This refrigerant usually circulates in the closed cooling circuit of the cooling unit and undergoes a series of different changes of state of matter. The refrigerants should have such properties that they can be used in the cooling circuit within a predetermined temperature difference. Single-component refrigerants and refrigerant mixtures of at least two components are known from the prior art. Before the priority date, the refrigerant was classified according to the latest edition of DIN 8960 Section 6.

[0003] By law, refrigerants cannot significantly contribute to the depletion of ozone in the atmosphere or global warming. This means that essentially no fluorinated or chlorinated substances are used as refrigerants, wh...

Claims

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