Core Technical Requirements Of Explosion-Proof Air Conditioners

Explosion-Proof Electrical System

Ø  Explosion-proof electrical components:

Key electrical components such as compressors, fan motors, thermostats, relays, etc. must have explosion-proof properties. The motor should be explosion-proof, and its casing can effectively prevent the electric sparks that may be generated inside from leaking to the external environment.

Ø  Explosion-proof electrical circuits:

The electrical circuits must use explosion-proof cables, and explosion-proof junction boxes must be used at the connection points for sealing to prevent the electric sparks generated by short circuits, open circuits, and other faults from being exposed.

Ø  Intrinsically safe circuit design:

The design of the circuit must follow the principle of intrinsic safety, limit energy parameters such as current and voltage, and ensure that no energy sufficient to cause an explosion is released under normal and fault conditions.

Explosion-Proof Shell Design

Ø  Material selection:

The shell is usually made of high-strength metal materials, such as high-quality steel plates, and has sufficient thickness and strength to withstand the possible explosion pressure inside.

Ø  Sealing:

The joint surface of the shell must be precisely processed to ensure that its parameters such as clearance and roughness meet the explosion-proof standards, so that the inside of the shell is effectively isolated from the external environment and combustible gases are prevented from entering the internal electrical chamber.

Explosion-proof grade identification:

The explosion-proof grade of the shell is usually marked with an ex mark, including exd (explosion-proof type), exe (increased safety type), exp (pressure type), etc., each with different applicable occasions and requirements.

Explosion-Proof Refrigeration System

Ø  Refrigerant selection:

Refrigerants that are not easy to burn, not easy to explode and have stable chemical properties should be selected.

Ø  Refrigeration pipe sealing:

The connection of the refrigeration pipe should be firmly sealed to prevent refrigerant leakage. At the same time, components such as condensers and evaporators must undergo strict quality control to prevent leakage and blockage.

Other Technical Requirements

Ø  Explosion-proof design:

The interior of the equipment is divided into multiple explosion-proof chambers, and explosion-proof gaps are set between each chamber. Even if an explosion occurs in a chamber, the explosion-proof gap can effectively block the flame from spreading to other chambers or the external environment.

Ø  Anti-static and grounding protection:

The surface of the explosion-proof air conditioner is specially treated (such as electrostatic spraying) and equipped with a complete grounding system. This can effectively prevent static electricity accumulation and discharge, and avoid the risk of explosion caused by static electricity.

Ø  Positive pressure ventilation technology:

In some high-end explosion-proof air conditioners, positive pressure ventilation design is adopted. By continuously injecting clean air (such as nitrogen) into the equipment, the equipment is kept in a positive pressure state to prevent external flammable gases from entering.

Ø  Intelligent monitoring and protection system:

Equipped with multiple sensors such as temperature, pressure, and humidity to monitor the operating status of the equipment in real time. Once an abnormality is detected (such as overheating, overpressure or air leakage), the system will immediately activate the protection mechanism (such as shutdown, alarm, etc.).