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Analysis of the purchase points of explosion-proof refrigerators

Update:25-03-2022
Summary:

1. Must have explosion-proof certificate of explosion-p […]

1. Must have explosion-proof certificate of explosion-proof refrigerator

Second, the purchase of explosion-proof refrigerators must use environmentally safe refrigerants, so that even if the refrigerant is revealed, it will not explode.

At present, due to the introduction of environmentally friendly refrigerants in my country, the corrosive effect of Freon on the earth's ozone layer is a scientific study. R600a is isobutane, which is slightly soluble in water and has good compatibility with most metals such as stainless steel, copper aluminum and carbon steel, but is flammable and explosive; R134a is a refrigerant with relatively high water solubility, so It is not very good for refrigeration systems, and under the action of lubricating oil, this refrigerant will produce acid, carbon dioxide or carbon monoxide, and will have a corrosive effect on metals. Therefore, the drying and cleaning requirements of R134a on the system are relatively high, and each has its own advantages and disadvantages.

Third, the purchase of explosion-proof refrigerators must be real IIC-level two-layer explosion-proof refrigerators.

Explosion-proof electrical equipment is divided into two categories: Class I is electrical equipment used in coal mines; II is electrical equipment used in places other than mines. Class II electrical equipment is further divided into three categories: IIA, IIB, and IIC. Explosion-proof refrigerators are classified as Class II explosion-proof electrical equipment. At the same time, the IIC level is the highest level among the Class II equipment. The environment with hydrogen and acetylene must be the IIC level explosion-proof electrical equipment, and the IIB level cannot meet the specifications.

Fourth, the explosion-proof refrigerator box is designed and manufactured in zone 0, and the fire-free liner explosion-proof technology, but the structure type is not only the ia explosion-proof type.

According to the unevenness of the blasting risk level, the gas/vapor risk sites are divided into: Zone 0, Zone 1 and Zone 2, and their division mainly depends on the release level of the release source (blasting risk source). The ability of ventilation equipment and the natural elements of the place will have an impact on its division, and even have a great impact.

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