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Mixing refrigerant in use for repalcing R12 and R500

A mixed refrigerant and R12 technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of large temperature difference and refrigeration performance impact

Inactive Publication Date: 2006-12-06
珠海亚路精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the non-azeotropic refrigerants in these mixed refrigerants, because there are more than two kinds of mixed substances, are separated in the refrigerator, and the temperature difference is large during the evaporation and condensation process, which has an adverse effect on the refrigeration performance.

Method used

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  • Mixing refrigerant in use for repalcing R12 and R500
  • Mixing refrigerant in use for repalcing R12 and R500
  • Mixing refrigerant in use for repalcing R12 and R500

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, the mixed refrigerant is a specific mixture composed of chlorodifluoromethane (R22) 0-100% and dimethyl ether (Dimethyl ether) 0-100%. This embodiment proves through experiments that the mixed refrigerant exhibits azeotropic or near-azeotropic properties within the appropriate composition range of the two components; that is, it exhibits the same or almost similar boiling points of liquid and vapor compositions, that is, within the above range exhibit essentially the same or similar vapor pressure composition.

[0023] The experiment was performed at a temperature of 10°C, 20°C, and 30°C (constant temperature, temperature deviation adjusted to within ±0.01°C), with a volume of about 100CM 3 It is carried out in a container to manufacture a mixture of multi-group ratios of chlorodifluoromethane (R22) and dimethyl ether (Dimethyl ether), and make it reach vapor-liquid equilibrium (Vapor-liquid Equilibrium). The container is equipped with a 0-5Mpa vapo...

Embodiment 2

[0036] This example further demonstrates that a suitable mixture of chlorodifluoromethane (R22) and dimethyl ether (Dimethylether) exhibits azeotropic properties.

[0037] Experiment: Distillation experiment. If the mixture is non-azeotropic, the lowest boiling point in the mixture will be distilled first, and the other components in the mixture will also separate.

[0038] Instruments and equipment: the volume is about 1200CM 3 Reboiler (Reboiler) (4 m height distillation column with 39 10 cm sieves (Nit mesh), each distillation column consists of multiple 4 inch diameter condensers); vapor pressure gauge and temperature.

[0039] Experimental method: A mixture of chlorodifluoromethane (R22) and dimethylether (Dimethylether) is produced in the reboiler, the temperature of the condenser is kept constant, and a fixed amount of heat is added to the reboiler (reboiler) to achieve thermodynamic equilibrium After the state, the liquid sample was taken in the reboiler and analyzed...

Embodiment 3

[0046] This example demonstrates the miscibility of a mixture of chlorodifluoromethane (R22) and dimethyl ether with antifreeze oil used in compressors.

[0047] Use 150CM 3 The wall of the measuring cup is tempered glass, inject 10ml of antifreeze oil, and then inject about 20g of dimethyl ether (Dimethyl ether). After mixing with a magnetic drive stirrer, continue injecting chlorodifluoromethane (R22) to confirm whether it is separated from the oil The method of miscibility experiment was carried out.

[0048] The temperature was maintained at 25°, and the injection amount of chlorodifluoromethane (R22) was gradually increased to 80g to confirm its state. In order to prevent abnormalities, the change was continuously observed for the next 168 hours.

[0049] The oils used in the above experiments were mineral oil (SUNISO, 5GS) used in HCFC refrigerants and ester-based synthetic oils (OM Master, OM-PAG) used in HFC refrigerants.

[0050] The test results are shown in Table ...

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Abstract

This invention relates to a refrigerant composition that can substitute Freon R12 and R500. The refrigerant composition mainly comprises CHCIF2, dimethyl ether, and additive selected from CF3I, CHF2CF3, CF3CHFCF3, and CO2. The refrigerant composition is suitable for all kinds of lubricating oils without the need for changing the previous freezing equipment. Besides, the refrigerant composition has low ozone depletion potential (ODP) and global warming potential (GWP), thus can substitute Freon series R12 and R500 for environmental protection.

Description

technical field [0001] The invention relates to a refrigerant (also known as refrigerant), in particular to a mixed refrigerant for directly replacing Freon series refrigerants R12 and R500. Background technique [0002] Currently, chlorofluorocarbon (Chloro-Fluoro-Carbon, hereinafter referred to as CFC) compounds have been banned in the Montreal Protocol because they damage the ozone layer. Therefore, most countries now use hydrochlorofluorocarbons (Hydro-Chloro-Fluoro-Carbon, hereinafter referred to as HCFC) with an ODP close to 0.0 or hydrofluorocarbons (Hydro-Fluoro-Carbon, hereinafter referred to as HFC) with an ODP of 0.0, but evaluation The performance and price of HCFC and HFC refrigerants, as substitutes, cannot reach the thermal performance of CFC series refrigerants that have been used in the past. In order to improve these problems, the development and research of new refrigerants and mixed refrigerants are being actively carried out. [0003] Any substance tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
Inventor 金泳来金映俊权五星金在德
Owner 珠海亚路精细化工有限公司
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