Before introducing explosion-proof air-conditioning explosion-proof principles, we must first understand the basic physical principles and definitions of explosion-proof.
When a flammable object suddenly encounters a high temperature, a chemical reaction occurs. There are many kinds of flammable items, including gas, steam, fog, and dust. The three necessary conditions for fire or explosion are:
Flammable concentrations of flammable substances
B oxygen (air)
C ignition source
Explosion-proof air conditioning principle: Maintenance of explosion-proof air conditioners on the basis of ordinary air conditioners, including explosion protection of electrical systems such as compressors, fans, and circuits. Based on the light-coupled solid state relay control circuit as the core of the entire explosion-proof electrical control system, the basic function of the original air conditioner maintains the original air conditioning, simplifies the structure, simplifies operation, and can be safely used in a mixed gas environment. At the same time, because the explosion-proof air conditioner effectively reduces the ambient temperature, it can also prevent the danger of high temperature of flammable materials.
Explosion-proof air conditioning conventional explosion-proof processing (explosion-proof type) is:
Explosion-proof type (an explosion-proof type, indicated by the letter "d")
An electronic device with a piercing shell is capable of withstanding the explosive pressure of the internal gas explosive mixture, preventing the internal explosion from exploding and diffusing the explosive mixture around the housing.
Another type (an explosion-proof type, indicated by the letter "e")
Under normal operating conditions, arcs, sparks, or explosion mixtures that may ignite the structure of high-temperature equipment are not used, and measures are taken to increase the degree of safety in order to avoid overloading of electrical equipment under normal conditions.
Wood type (an explosion-proof type, indicated by the letter "I")
EDM and thermal effects of normal operation or specified fault conditions do not ignite explosive mixtures of circuit equipment.
Positive pressure (an explosion-proof type, represented by the letter "p")
An electronic device with a pressurized housing that maintains the internal gas pressure above the pressure of the surrounding explosive atmosphere and prevents the outer layer mixture from entering the housing.
Oil type (an explosion-proof type, indicated by the letter "o")
Full or partial immersion in the oil makes it impossible for the equipment to indicate the explosive mixture on the surface of the fuel or electrical equipment other than the enclosure.
Emery type (an explosion-proof type, indicated by the letter "q")
The casing is filled with sand material. Under the specified conditions of use, the arc shell, the spread of the flame, and the overheating of the casing surface or surface will not ignite around the explosive mixture of the electrical equipment.
Non-spark type (an explosion-proof type, indicated by the letter "n")
Under normal operating conditions, the surrounding explosion mixture will not be ignited and there will be no ignited electrical equipment.
Water seal type (an explosion-proof type, indicated by the letter "m")
It may generate arcs, sparks, or high temperatures, causing the mixture in the cast sealant to ignite so that he cannot ignite the surrounding explosion mixture.
Closed type (an explosion-proof type, indicated by the letter "h")
The housing is sealed in a method of melting, squeezing or adhering, preventing the outer layer of the housing from entering the housing.
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