Patent ID: 8206477

Claim:
A liquid trap device for a gas comprising a trap housing that is formed from a ceiling wall, a bottom wall opposite the ceiling wall, and a peripheral wall connecting the ceiling wall and the bottom wall, the ceiling wall having provided therein a gas inlet port and a gas outlet port, the ceiling wall having an upwardly extending recess, and a tubular filter element that is retained between the ceiling wall and the bottom wall, an interior of the filter element directly communicating with the gas inlet port and an outer peripheral face of the filter element communicating with the gas outlet port via an internal space of the trap housing, wherein the filter element and an outlet port upstream portion, opening within the trap housing, of the gas outlet port are disposed in proximity to first and second side wall portions respectively of the peripheral wall facing each other on one laterally central line in plan view of the trap housing, wherein when the internal space of the trap housing is divided into two areas by dividing the laterally central line into two equal parts, a central axis of the filter element and a central axis of the outlet port upstream portion are each disposed in the respective areas, wherein an inlet port downstream portion, opening within the filter element, of the gas inlet port is formed as projecting into the filter element from a lower face of the ceiling wall defining an inflow guide tube, and wherein the outlet port upstream portion is formed as projecting into the recess in the ceiling wall above and adjacent the internal space.