Respiratory apparatus airflow tube

A respiratory apparatus comprising:

• an airflow generator machine comprising:
• an airflow generator configured to drive an airflow through an output port;
• a heating unit;
• and
• a heater controller;
• and
• an airflow tube comprising:
• a flexible tube having a machine end, a patient end, first and second heater wires extending from the machine end toward the patient end, and an airflow pathway extending within the flexible tube from the machine end to the patient end;
• a patient interface connector attached to the patient end and configured to attach to a patient interface;
• and
• a machine connector attached to the machine end of the flexible tube and connected to the output port, the machine connector including:
• an airflow housing having an interior wall defining a portion of the airflow pathway;
• and
• a temperature sensor located outside the airflow pathway,
• wherein:
• an airflow generated by the airflow generator machine travels through the airflow pathway including the airflow housing;
• the heater controller is configured to control the heating unit to drive a current through the first and second heater wires using the temperature sensor;
• and
• the temperature sensor is located on an exterior side of the airflow housing.

A respiratory apparatus airflow tube configured to deliver an airflow from an airflow generator machine to a patient interface, the airflow tube comprising:

• a flexible tube including a machine end, a patient end, first and second heater wires extending from the machine end toward the patient end, and an airflow pathway extending within the flexible tube from the machine end to the patient end;
• a patient interface connector attached to the patient end of the flexible tube and configured to attach to a patient interface;
• and
• a machine connector attached to the machine end of the flexible tube and configured to attach to an airflow generator machine, the machine connector including:
• an airflow housing having an interior wall defining a portion of the airflow pathway;
• a temperature sensor;
• an electrical connector comprising:
• a first heater wire contact;
• a second heater wire contact;
• a first temperature sensor contact;
• and
• a second temperature sensor contact;
• a first conductor connecting the first heater wire contact to the first heater wire;
• a second conductor connecting the second heater wire contact to the second heater wire;
• and
• third and fourth conductors connecting the temperature sensor in series with the first and second temperature sensor contacts.

A respiratory apparatus airflow tube configured to deliver an airflow from an airflow generator machine to a patient interface, the airflow tube comprising:

• a flexible tube including a machine end, a patient end, first and second heater wires extending from the machine end toward the patient end, and an airflow pathway extending within the flexible tube from the machine end to the patient end;
• a patient interface connector attached to the patient end and configured to attach to a patient interface;
• a machine connector attached to the machine end and configured to attach to an airflow generator machine, the machine connector including:
• an airflow housing having an interior wall defining a portion of the airflow pathway;
• and
• a temperature sensor located outside the airflow pathway;
• and
• an assembly attached to the airflow housing comprising:
• the temperature sensor;
• a first conductor connected to the first heater wire;
• a second conductor connected to the second heater wire;
• a third conductor connected to the temperature sensor;
• and
• an airflow tube electrical connector configured to connect to a machine electrical connector of the airflow generator machine comprising:
• a first electrical contact connected to the first conductor;
• a second electrical contact connected to the second conductor;
• and
• a third electrical contact connected to the third conductor,
• wherein an airflow generated by the airflow generator machine travels through the airflow pathway including the airflow housing.

A respiratory apparatus airflow tube configured to deliver an airflow from an airflow generator machine to a patient interface, the airflow tube comprising:

• a flexible tube including a machine end, a patient end, first and second heater wires extending from the machine end toward the patient end, and an airflow pathway extending within the flexible tube from the machine end to the patient end;
• a patient interface connector attached to the patient end and configured to attach to a patient interface;
• and
• a machine connector attached to the machine end and configured to attach to an airflow generator machine, the machine connector including:
• an airflow housing having an interior wall defining a portion of the airflow pathway;
• and
• a temperature sensor located outside the airflow pathway,
• wherein:
• an airflow generated by the airflow generator machine travels through the airflow pathway including the airflow housing;
• the machine connector includes an airflow tube electrical connector configured to connect to a machine electrical connector of the airflow generator machine, the airflow tube electrical connector comprising:
• a first electrical contact connected to the first heater wire;
• a second electrical contact connected to the second heater wire;
• and
• a third electrical contact connected to the temperature sensor;
• and
• the machine connector includes an electrical fuse in series with the first or second heater wire, wherein the electrical fuse is configured to block current flow through the first or second heater wire in the event of a current spike or a voltage spike through the first or second heater wire.