JPH06100854A - Mixed refrigerant - Google Patents

Abstract

PURPOSE:To obtain a mixed refrigerant substantially free from the problem of ozonosphere depletion by mixing a specified fluorine-containing refrigerant with a low-molecular hydrocarbon and further with a silicone and a low- molecular alcohol. CONSTITUTION:A hydrochlorofluorocarbon(HCFC) refrigerant is mixed with a low-molecular-weight hydrocarbon (e.g. butane) and further with a silicone and a low-molecular-weight alcohol (e.g. methanol) in order to increase the specific gravity of the gas. The obtained refrigerant has a chlorine content of 75% lower than that of HCFC R-22 which is believed to little deplete the ozonosphere, and therefore, it is a heavy refrigerant substantially free from the problem of ozonosphere depletion and safely usable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant which hardly destroys the ozone layer.

[0002]

2. Description of the Related Art As a conventional technique, there is a mixed refrigerant that mixes fluorocarbons of the same kind, but since they are of the same kind, it is difficult to prevent pollution of fluorocarbons. Further, in the case of the conventional technology Japanese Patent Application No. 4-194490 which is considered as a countermeasure for the pollution of fluorocarbons, propane C ₃ H ₈ or ethylene C ₂ H ₄ , propylene C ₃ H ₅ or the like having a strong flammability is used as an organic compound as a main component. , Relating to a refrigerant to which silicone or the like is added in order to change these hydrocarbons into flame retardant, but has the drawback that a large amount of silicone is required to make an inflammable organic compound flame retardant. I have it. The present invention is a mixed refrigerant in which R-22CHClF ₃ having a small chlorine content is a main component, and R-22 is mixed with butane C ₄ H ₁₀ in order to make R-22 a heavy gas. The conventional R-22 has a low chlorine content and is considered to have a small effect on the ozone layer, and is a refrigerant that can be used until 2000.
C shows about 6 atm (static pressure or saturation pressure), while R-
Since 22 indicates 11 atm, it is not suitable for a general refrigerator requiring low pressure condensation. It is also possible to use R-22
Has the following problems. The molecular weight of R-12 is 120.92, the gas pressure is about 6 atm, and the molecular weight of R-22 is 86.98, the gas pressure is about 11 atm. This means that R-22 has less chlorine content but weighs less than R-12. Since it means lightly reaching the ozone layer at a high rate, it cannot be said that R-22 has particularly few problems with the ozone layer.

[0003]

Therefore, R-22, which originally has a low chlorine content, is used as a basic substance of a mixed refrigerant, and another basic refrigerant is mixed with this basic refrigerant to give physical properties similar to those of R-12 and gas. It aims to solve the problem of ozone pollution by measuring the increase in weight.

[0004]

Hydrocarbons that can be used as a mixed refrigerant include paraffins such as ethane, propane and butane, and olefins such as ethylene, but butane is particularly suitable. Butane will be mainly described as an added refrigerant. . Heavy butane gas has a low gas pressure of about 3 atm at 25 ° C, and this low pressure makes the high pressure of R-22 very similar to that of low pressure R-12, which is easy to use. It will halve it and take the main objective of ozone pollution control. In addition, alcohols having OH groups may be added in order to increase the weight and measure the coagulation effect. Methanol CH ₃ OH or ethanol C ₂ H ₅ OH is suitable for alcohols, and it can be used as a nonflammable detergent. As described above, the mixed refrigerant having the composition of R-22 and butane is further mixed with a small amount of silicone. The reason for adding silicone is that silicon, which is the main component of silicone, originally coexisted in the form of fluorine and rocks, so it is used as a component closer to the ground to further reduce problems with the ozone layer and the atmosphere. . Further, silicone is rich in lubricity, rust prevention and stability and can improve the performance of lubricating oil.

[0005]

EXAMPLES Table 1 shows composition examples of the mixed refrigerant of the present invention and experimental results. Test conditions 1. Cooling effect test Limit temperature of cooling capacity (nozzle diameter 1 mm) obtained by directly injecting into the main part of a rod-type thermometer with gas pressure of each refrigerant under temperature conditions of 25 ° C and atmospheric pressure. Flammability test Injection of mixed refrigerant into gas torch flame The experiment was conducted with butane for lighters (mixed solution of isobutane and normal butane). Table 2 shows the present examples of CFCs.

[0006]

As described above, for example, in the case of test number NO4 in Table 1 of the mixed refrigerant of the present invention, the chlorine content of Freon R-22, which is said to have little ozone pollution, can be further reduced by 75%, and ozone pollution can be reduced. It is a heavy refrigerant that can be used with peace of mind.

[Table 1]

[Table 2]

Claims (1)

[Claims] 1. A refrigerant in which a hydrocarbon having a small number of molecules is mixed with a fluorine refrigerant composed of CH, Cl, and F, and silicone and alcohols having a small number of molecules are added to further increase the weight of gas.