Pressure equalization apparatus and methods

摘要

A pressure equalization apparatus (10) for decreasing or eliminating the pressure differential between the internal pressure within a sealed system (12) and the external ambient air pressure while concurrently sustaining a dry atmosphere inside the enclosure. The apparatus includes a variable volume chamber (16) coupled in fluid communication with the sealed system and adapted to change its volume as in relation to the pressurization of the sealed system. Gas flowing between the sealed system and the variable volume chamber, as the pressurization changes, is exposed to an adsorbent (36) operative for dehumidifying the exchanged gas. The sealed system may comprise a waveguide.