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AssigneeFisher & Paykel Healthcare Limited
InventorsCameron John BREWSTER, Edward John EVANS, Arjen David KAT, Bruce Gordon HOLYOAKE, Gareth Thomas MCDERMOTT, Cameron Leslie MATTHEWS, Hannah Maree MATTHEWS, Evan Anthony MAUNDER, Winnie Yong JIANG-FOO
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A device for providing respiratory gases comprises a blower configured to receive a first gas from a first gas flow path and generate a flow of a first gas provided through a first gases outlet of the blower; a second gas flow path configured to receive a flow of a second gas and provide the flow of the second gas through a second gases outlet; and a mixing chamber configured to receive a flow of the first gas from the first gases outlet and a flow of the second gas from the second gases outlet. The received gases are configured to mix in the mixing chamber to form a mixed gas. The received gases are configured to travel in a mixing flow direction in the mixing chamber towards a mixed gases inlet, wherein mixed gas exits the mixing chamber via the mixed gases inlet providing flow to a mixed gas flow path.
A device for providing respiratory gases, the device comprising:
The device according to any one of the preceding claims, wherein the first gases outlet and the second gases outlet are arranged relative to the mixing chamber such that the first gases outlet is arranged to direct the first gas entering the mixing chamber away from the second gases outlet.
The device according to any one of the preceding claims, wherein the first gases outlet and the second gases outlet are arranged such that the first gas in the first gases outlet is directed in a first flow direction between a direction that is substantially parallel to a second flow direction of the second gas in the second gases outlet, and a direction that is substantially perpendicular to the second flow direction.
The device according to any one of the preceding claims, wherein the mixing chamber is substantially circular in cross section.
The device according to any one of the preceding claims, wherein the mixing chamber is substantially cylindrical.
The device according to any one of the preceding claims, wherein the mixing flow direction in the mixing chamber is around a central shaft.
The device according to any one of the preceding claims, wherein the mixing chamber is configured such that gases travel in the mixing chamber in a spiral manner.
The device according to any one of the preceding claims, wherein the mixing chamber is comprised of a plurality of adjacent sectors, and wherein the first gases outlet and the second gases outlet are arranged in adjacent sectors of the mixing chamber.
The device according to any one of the preceding claims, wherein arrangement of the second gases outlet permits flow of gases from the mixing chamber into the second gas flow path.
The device according to any one of the preceding claims, wherein the second gases outlet comprises a lead-in portion.
The device according to any one of the preceding claims, wherein the second gas flow path comprises a flow conditioner at the second gases outlet which is configured to increase resistance to flow of gases from the mixing chamber.
The device according to any one of 23 to 25, wherein the flow conditioner is formed integrally with the device.
The device according to any one of the preceding claims, wherein the second gas flow path comprises one or more nozzles configured provide the flow of the second gas to the mixing chamber through a nozzle diameter which is less than a diameter of the second gas flow path.
The device according to any one of the preceding claims, wherein the second gas flow path comprises a non-return valve.
The device according to any one of the preceding claims, wherein the device comprises a first flow sensor for sensing flow rate of gases in the first gas flow path.
The device according to any one of the preceding claims, wherein the device comprises a second flow sensor for sensing flow rate of gases in the second gas flow path.
The device according to any one of the preceding claims, wherein the second gas flow path comprises a proportional valve.
The device according any one of the preceding claims, wherein the device comprises a third flow sensor for sensing flow rate of the mixed gas in the mixed gas flow path.
The device according to any one of the preceding claims, wherein one or more of the first gas, second gas and mixed gas flows comprise a flow rate of 0 L/min or greater, optionally the mixed gas flow comprises a flow rate of about 20 L/min to about 90 L/min, optionally the mixed gas flow comprises a flow rate of about 40 L/min to about 70 L/min.
The device according to any one of the preceding claims, comprising a plurality of cooperating components through which bores have been formed which cooperate to define a plurality of gas flow paths, and into which cooperating cavities have been formed to define a cavity for receiving the blower and a mixing chamber.
The device according to any one of the preceding claims, comprising a pneumatic block having three or more cooperating components, wherein:
The device according to any one of the preceding claims, comprising a housing.
The device according to any one of the preceding claims, wherein the first gas flow path is an oxygen flow path.
A device for providing respiratory gases, the device comprising:
A device for providing a flow of respiratory gases, the device comprising a pneumatic block assembly comprising a plurality of cooperating block components configured to provide, when assembled:
A device for providing a flow of respiratory gases, the device comprising:
A device for providing a flow of respiratory gases, the device comprising:
Dependencies are inferred from the claim text.