Device for delivering gas

A device for delivering gas, comprising:

• a frame having a first side to connect a nasal mask and a second side opposite the first side, said second side comprising an interface, wherein the frame and the nasal mask form a cavity;
• a gas delivery hose having an exhaust end connector detachably connectable to the second side of said frame via an interface that is insertable into the interface on the second side, and an intake end connector for connection to a breathing machine hose, wherein the exhaust end connector is connected to the intake end connector and the cavity;
• and
• a noise reduction component comprising a muffler,
• wherein the exhaust end connector includes a ventilation port that is connectable to the cavity, and the muffler is connectable to the exhaust end connector and covers an inner side of the ventilation port, wherein the muffler is in a form of a thin sheet and has a thickness T of no more than 10 mm;
• wherein the muffler is made of noise reducing cotton or noise reducing mesh;
• wherein the muffler has a first surface facing an external environment and a second surface opposite the first surface, the first surface having a first breathable area exposed to the external environment, and the second surface having a second breathable area exposed to an internal space of the exhaust end connector, and the muffler also having multiple breathable channels to communicate with the first breathable area, the second breathable area configured to allow gas in the cavity to be discharged from the muffler to the external environment.

A device for delivering gas, comprising:

• a frame having a first side to connect a nasal mask and a second side opposite the first side, said second side comprising an interface, wherein the frame and the nasal mask form a cavity, and said frame comprising a ventilation port;
• a gas delivery hose having an exhaust end connector detachably connectable to the second side of said frame via an interface that is insertable into the interface on the second side, and an intake end connector for connection to a breathing machine hose, wherein the exhaust end connector is connectable to the intake end connector and the cavity;
• and
• a noise reduction component comprising a muffler, and a shell;
• wherein at least one ventilation port is provided on said shell to communicate with said cavity, and said shell is connectable to said frame;
• wherein said muffler is attached to said shell,
• wherein a surface area of said first breathable area is 3% to 72% of a surface area of an outer surface of said frame, and wherein said outer surface is provided on said second side.

A device for delivering gas, comprising:

• a frame having a first side to connect a nasal mask and a second side opposite the first side, said second side comprising an interface, wherein the frame and the nasal mask form a cavity, and said frame comprising a ventilation port;
• a gas delivery hose having an exhaust end connector detachably connectable to the second side of the frame via an interface that is insertable into the interface on the second side, and an intake end connector for connection with a breathing machine hose, wherein the exhaust end connector is in communication with the intake end connector and the cavity;
• and
• a noise reduction component comprising a muffler,
• wherein the ventilation port communicates with the cavity, and said muffler is attached to a surface of the first side of the frame, wherein said muffler has a first surface facing an external environment and a second surface opposite the first surface, the first surface having a first breathable area exposed to the external environment, and the second surface has a second breathable area exposed to the cavity, and wherein said muffler has multiple breathable channels that connect the first breathable area and the second breathable area and are configured to allow gas inside the cavity to be discharged from said muffler to the external environment;
• and
• wherein a surface area of said first breathable area is 3% to 72% of a surface area of an outer surface of said frame, and an area of said first breathable area or said second breathable area is between 1 to 21 cm2.