Toilettenspülkasten mit induzierter Luft

摘要

A pressure flushing system for use in a toilet tank includes a housing (10) with a water inlet conduit (18), an air and water inlet assembly (20) connected to the conduit (18) and to the housing (10), and a water outlet (16) for the housing (10). There is a flush valve within the housing (10) for controlling flow of water from the inlet to the housing outlet (16). The air and water inlet assembly (20) includes a chamber (26), with a water inlet (28) connected to the chamber (26), and an outlet (30) connected to the chamber (26). There is an air inlet (32) accessible to air at atmospheric pressure and a passage (34) between the air inlet (32) and the chamber (26). A check valve (42) is located in the passage (34), with the check valve opening in response to a venturi effect caused by water flow through the chamber (26) to draw air into the chamber (26) to mix with water flowing through the chamber (26) and to the outlet (30). The check valve (42) includes an elastomeric sleeve positioned within the passage and having normally closed flexible lips (50) extending toward the chamber (26). The lips (50) open to permit the passage of air into the chamber (26) to mix with the water therein when there is a pressure in the chamber (26) less than atmospheric.