Humidifier with back-flow prevention valve

摘要

A humidifier for use with a pressure support system. The humidifier includes a body having an inlet, a fluid holding chamber, and an outlet. The inlet is positioned upstream and in fluid communication with the fluid holding chamber. The outlet is positioned downstream of and in fluid communication with the fluid holding chamber. A back-flow preventing valve is positioned upstream of the fluid chamber. The back-flow preventing valve is movable between an open position, in which the inlet is unblocked, and a closed position in which the inlet is blocked. In the closed position, the back-flow preventing valve prevents fluid, fluid vapor, or both from entering the pressure support via the inlet to the humidifier.

主权项

1. A humidifier for use with a pressure support device, the humidifier comprising:
a body having a horizontally disposed inlet adapted to be operatively coupled to an outlet of the pressure support device such that a flow of gas generated by such pressure support device is communicated to the inlet, a fluid holding chamber, and an outlet of the body, wherein the inlet is positioned upstream and in fluid communication with the fluid holding chamber, and the outlet of the body is positioned downstream of and in fluid communication with the fluid holding chamber; and a first valve positioned in the inlet and upstream of the fluid chamber, wherein the first valve is movable between an open position in which the inlet is substantially unblocked and a closed position in which the inlet is substantially blocked, wherein the first valve comprises: a rotary valve plug having a biasing mechanism and an air channel therethrough, the air channel having a centerline which passes non-diametrically through the rotary valve plug; and a valve seat adapted to receive the rotary valve plug, wherein the rotary valve plug is movable within the valve seat between the open position and the closed position.