BREATHING APPARATUS WITH MONITORED DELIVERY DEVICE

摘要

A breathing apparatus has a first delivery device for adding a volume of a substance to a gas flow, the delivery device having a gas inlet and a gas outlet. A unit monitors a presence of the substance in a gas downstream the delivery device using a first sensor unit at the gas outlet that provides a first measurement value based on an acoustic property of a gas in a first conduit. A second sensor unit at the gas inlet provides a second measurement value based on an acoustic property of a gas present in the second conduit. A control unit determines the presence of the substance based on the first measurement value or based on a comparison of the first measurement value and the second measurement value.

主权项

1. A breathing apparatus comprising:
a delivery device comprising a gas flow conduit assembly wherein a volume of a substance to a gas flow in a main conduit of the assembly at a delivery point; a substance monitor configured to monitor a presence of said substance in said gas flow downstream the delivery point, said substance monitor comprising;
a first acoustic property sensor unit situated downstream the delivery point that emits a first acoustic gas property measurement value, anda second acoustic property sensor unit situated upstream the delivery point that emits a second acoustic gas measurement value; and a control processor operatively in communication with said first sensor unit and said second sensor, and configured to determine the presence of said substance based on said first measurement value and said second measurement value, said control processor also being configured to provide a regulatory loop for a gas composition including said substance added by said delivery device.