As a key component of cleanroom environments, the moisture resistance of the stainless steel air shower room's internal circuitry in humid environments directly impacts its operational stability and safety. Humid air can easily infiltrate the circuit system through convection or condensation, leading to oxidation of metal components, degradation of insulation materials, and even short circuit failures. Therefore, a comprehensive moisture-proofing system must be established, encompassing structural design, material selection, environmental control, and maintenance management.
Structurally, the stainless steel air shower room should feature a fully enclosed enclosure, with seamless welding processes minimizing gaps and preventing moisture from infiltrating through the joints of the exterior shell. The circuit installation area should be physically separated from the air shower channel by a separate isolation compartment to minimize direct moisture contact with the circuitry. Furthermore, rubber sealing strips should be installed at the interface between the door frame and the enclosure, along with automatic door closers and electronic interlocking systems to ensure the door remains tightly closed during air showering, preventing the ingress of moisture from outside. For example, some high-end models feature a double-layer seal around the door frame edge: an inner silicone soft seal and an outer metal hard seal, creating a double barrier of protection.
When selecting materials, circuit boards should preferably be treated with a three-component coating (moisture-proof, mildew-proof, and salt spray-proof). This coating forms a dense protective film on the substrate surface through a dipping or spraying process, blocking contact between water molecules and metal conductors. Connectors and terminals should be nickel- or gold-plated for improved corrosion resistance. Furthermore, cables should be waterproof-sheathed, such as polyvinyl chloride (PVC) or polyethylene (PE), and heat-shrink tubing should be used to seal the connectors to prevent moisture from penetrating along the conductors. Sensors and actuators exposed to air showers should be fitted with stainless steel protective covers and filled with thermally conductive silicone to enhance sealing.
Environmental control is crucial for moisture prevention. Stainless steel air shower rooms should be installed in an industrial dehumidifier to maintain relative humidity below 50% to reduce moisture content in the air. If the equipment is located underground or semi-underground, floor drains and moisture-proof floor panels should be installed to prevent condensation from accumulating on the ground. Some scenarios utilize a positive pressure ventilation system, which continuously introduces dry air into the enclosure, creating a slightly positive pressure environment and preventing the intrusion of humid air from outside. Temperature control is also crucial. It's recommended to maintain an ambient temperature around 25°C and lower relative humidity to minimize condensation.
During routine maintenance, regularly check the seals of the circuit compartment, focusing on aging and cracking of the sealing strips and loosening of the fixing screws. Monitor the humidity inside the compartment quarterly using a humidity meter. If it exceeds 60%, immediately initiate a dehumidification process. Avoid using water-based solvents when cleaning. Use anhydrous ethanol or a specialized electronics cleaner to wipe the circuit boards to prevent liquid residue and short circuits. For equipment that has been out of service for an extended period, place a moisture absorber in the compartment and regularly replace the desiccant to ensure a dry environment.
Furthermore, the moisture-proof design of the stainless steel air shower room must also take into account heat dissipation requirements. The compartment should have cooling vents or a cooling fan, but a dust filter should be installed to prevent both dust and moisture from entering. Some models use a heat exchanger to remove heat through circulating coolant, avoiding direct exchange with the outside air and reducing the intrusion of humid air.
Moisture-proofing the stainless steel air shower room requires comprehensive consideration throughout the entire process, from design and material selection to environmental control and maintenance. The synergistic effects of the enclosed structure, triple-proof materials, humidity control, and regular maintenance effectively ensure reliable operation of the internal circuitry in humid environments, providing stable air purification support for the cleanroom.
