Impact of Breathing Effect on Outdoor Electronic Equipment and Optimization of Sealing Structures

LIU Xinsheng; WANG Menglong; LI Lidan; XING Hongmei; DIAO Xiyao

doi:10.7643/issn.1672-9242.2026.04.005

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (4) : 40-49. DOI: 10.7643/issn.1672-9242.2026.04.005

Weapons Equipment

Impact of Breathing Effect on Outdoor Electronic Equipment and Optimization of Sealing Structures

LIU Xinsheng, WANG Menglong, LI Lidan, XING Hongmei, DIAO Xiyao

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Abstract

To solve the problems of moisture infiltration and water accumulation faults in outdoor electronic equipment (such as communication equipment, radar antennas, vehicle-mounted terminals, etc.) caused by the breathing effect, especially in military equipment support scenarios in islands and reefs in the South China Sea and in tropical monsoon climate zones, the work aims to make up for the deficiencies of existing sealing designs in breathing effect control, material selection adaptability, and dynamic protection, establish a “material-structure-auxiliary measure” synergistic sealing system to improve the reliability of equipment in complex environments. The gas exchange formula of the breathing effect was derived based on the ideal gas law. An extreme working condition experimental system of “sun exposure-sudden rainstorm” was built. The performance of sealing rubber strip structures was compared, and the temperature, humidity, and air pressure changes in real time were monitored to quantitatively analyze the sealing effect, and optimize the scheme through engineering verification. The results showed that the two-color circular solid O-type conductive rubber seal performed outstandingly, with an air pressure change of 1.69 KPa. Constructing a synergistic protection system of main seal and auxiliary seal could reduce the impact of the breathing effect. The core of the breathing effect was the “temperature difference-pressure difference-water absorption” action chain. The comprehensive system of boss-enhanced structures, two-color circular solid O-type rubber strips, and waterproof and breathable valves can effectively inhibit the breathing effect. It provides a theoretical basis and engineering paradigm for the sealing design of outdoor electronic equipment, and is of great significance for improving the reliability of equipment.

Key words

outdoor electronic equipment / breathing effect / sealing structure / conductive rubber / waterproof and breathable valve / extreme working conditions

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LIU Xinsheng, WANG Menglong, LI Lidan, XING Hongmei, DIAO Xiyao. Impact of Breathing Effect on Outdoor Electronic Equipment and Optimization of Sealing Structures[J]. Equipment Environmental Engineering. 2026, 23(4): 40-49 https://doi.org/10.7643/issn.1672-9242.2026.04.005

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