초록 ▼

A flow probe for use in a humidification system is disclosed. The flow probe is adapted to be positioned in a humidified gases flow (for example oxygen or anaesthetic gases) such as that which is provided to a patient in a hospital environment. The flow probe is designed to provide both temperature

A flow probe for use in a humidification system is disclosed. The flow probe is adapted to be positioned in a humidified gases flow (for example oxygen or anaesthetic gases) such as that which is provided to a patient in a hospital environment. The flow probe is designed to provide both temperature and flow rate sensing of the gases flow by incorporating two sensors (preferably thermistors) and the shape and alignment of the probe enables accurate readings by reducing the occurrence of condensation on the sensors. A number of possible applications are disclosed wherein the flow sensor is included in humidification control systems which provide a patient with a desired humidity level or simplify the amount of user input required or wherein the flow sensor provides a controller with flow information which may then be used to determine certain, possibly dangerous, conditions (such as incorrect flow sensor placement, breathing circuit disconnected, no water in the humidification chamber or humidity out of required limits).

대표청구항 ▼

A flow probe for use in a humidification system is disclosed. The flow probe is adapted to be positioned in a humidified gases flow (for example oxygen or anaesthetic gases) such as that which is provided to a patient in a hospital environment. The flow probe is designed to provide both temperature

A flow probe for use in a humidification system is disclosed. The flow probe is adapted to be positioned in a humidified gases flow (for example oxygen or anaesthetic gases) such as that which is provided to a patient in a hospital environment. The flow probe is designed to provide both temperature and flow rate sensing of the gases flow by incorporating two sensors (preferably thermistors) and the shape and alignment of the probe enables accurate readings by reducing the occurrence of condensation on the sensors. A number of possible applications are disclosed wherein the flow sensor is included in humidification control systems which provide a patient with a desired humidity level or simplify the amount of user input required or wherein the flow sensor provides a controller with flow information which may then be used to determine certain, possibly dangerous, conditions (such as incorrect flow sensor placement, breathing circuit disconnected, no water in the humidification chamber or humidity out of required limits). second spaced apart peripheral lands, the first end of the sleeve member is in contact with the armature of the electrically controlled coil assembly, the first peripheral land is spaced from the first end of the sleeve member and of a size to be slideably received within the stepped bore in the housing and the second peripheral land is larger than the first peripheral land and of a size to be slideably received in the stepped bore in the housing to form a force control chamber therebetween, the first port of the sleeve member extends from the peripheral surface thereof to the blind bore and the second port thereof extends from the second peripheral land to the blind bore, the plug member has first and second portions, the first portion has a diameter that extends into the blind bore and is sealingly secured to one end of the blind bore, the second portion of the plug member has a diameter larger than the diameter of the first portion thereof and is sealingly disposed in the blind bore of the sleeve member to define a flow control chamber between a portion of the blind bore of the sleeve member and the diameter of the first portion of the plug member, the flow control chamber extends parallel with the reference axis of the housing and is in continuous communication with the first and second ports of the sleeve member, the flow control chamber in cooperation with the first and second ports in the sleeve member create a flow path through the valving element assembly; a spring bumper plug secured in the stepped bore of the housing to form a spring chamber and located at the end thereof opposite to the electrically controlled coil assembly; and a spring member disposed in the valving element assembly between the sleeve member and the bumper plug and operative to urge the valving element assembly towards the electrically controlled coil assembly, the bleed port in the housing communicates with the spring chamber. 17. The single stage, electrically controlled variable pressure relief valve assembly of claim 16 wherein the difference in size of the first and second perip