Systems and methods of detecting incorrect connections in a humidification system
AssigneeFisher & Paykel Healthcare Limited
InventorsPo-Yen Liu, Ivan Chih-Fan Teng, Ho Shing Lo
Life of this patent
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Abstract
Various control methods can indirectly determine incorrect connections between components in a respiratory therapy system. For example, incorrect connections can occur between a patient interface, a humidifier, and/or a gases source. The methods can indirectly detect if reverse flow conditions or other error conditions exist. A reverse flow condition can occur when gases flows in a direction different from an intended direction of flow. The methods can be implemented at the humidifier side, at the gases source side, or both.
Claims20
A reverse flow detector for a humidification system that includes a gases source, a humidifier, and a breathing circuit, and configured to detect a reverse flow condition in the humidification system, the reverse flow detector comprising:
- a controller configured to:
- receive a sensor signal indicative of an outlet temperature at an outlet of a chamber of the humidifier that carries humidification fluid;
- and
- in response to detecting at least two trigger events related to the outlet temperature of the chamber, output an indication of a reverse flow condition,
- wherein a first trigger event comprises the chamber outlet temperature reaching a first threshold temperature.
Dependencies are inferred from the claim text.