A snow burial survival mask has an exhaust tube connected to a headgear. An intake port of the exhaust tube is positioned adjacent to a breathing portion of the headgear in order to intake exhaled carbon dioxide (CO2)-rich air. An air pump connected to the exhaust tube pump the exhaled air from the intake port to an exhaust port away from the user's face, extending survival time in a snow burial situation. At least one burial detection sensor such as a motion sensor, light sensor and/or CO2 sensor is configured to activate the air pump based on detection of a burial event.

A mouth seal assembly for use with a nasal mask system includes a mouth seal adapted to form a seal with the patient's mouth. The mouth seal is substantially independent from a supply of pressurized air from the nasal mask system. An anti-asphyxia valve may be provided to either the mouth seal over the patient's lips or the nasal mask system. A strap arrangement may support the mouth seal in a desired position on the patient's face in use.

The present invention provides a mask structure, which comprises a first mask body, a main filtering layer, an air-isolator, and a second mask body. The main filtering layer is disposed at the first mask body. The area of the main filtering layer is smaller than the area of the first mask body. The air-isolator is disposed at the first mask body and adjacent to the periphery of the main filtering layer. The second mask body covers the main filtering layer and the air-isolator and is bonded with the air-isolator and the first mask body. Thereby, the bonding part of the mask structure can be tight and the filtering materials of the main filtering layer, such as sterilizing or adsorptive materials, will not leak from the bonding part. In addition, the air-isolator can guide the air inside and outside the mask structure to pass only through the main filtering layer for preventing the polluting particles, bacteria, or viruses inside and outside the mask structure from being propagated to the external environment or inhaled by the user.

The present invention provides a mask structure, which comprises a first mask body, a main filtering layer, an air-isolator, and a second mask body. The main filtering layer is disposed at the first mask body. The area of the main filtering layer is smaller than the area of the first mask body. The air-isolator is disposed at the first mask body and adjacent to the periphery of the main filtering layer. The second mask body covers the main filtering layer and the air-isolator and is bonded with the air-isolator and the first mask body. Thereby, the bonding part of the mask structure can be tight and the filtering materials of the main filtering layer, such as sterilizing or adsorptive materials, will not leak from the bonding part. In addition, the air-isolator can guide the air inside and outside the mask structure to pass only through the main filtering layer for preventing the polluting particles, bacteria, or viruses inside and outside the mask structure from being propagated to the external environment or inhaled by the user.

Provided herein is a portable air purifier. The portable air purifier includes: a body; first to third accommodation portions configured to have respective open top surfaces in order to separately accommodate a battery, an air compressor, and water; first to third covers configured to selectively open and close the respective open top surfaces of the first to third accommodation portions; an air inlet connected to the lower portion of the second accommodation portion, and configured to accommodate a pre-filter; a siphon pipe positioned upright inside the water of the third accommodation portion, and configured such that the top thereof is connected to the air outlet of the air compressor; a cannula installed on the top of the third accommodation portion, and configured to supply purified, humidified air to a user; and a power switch configured to control the amount of air to be supplied.

Provided herein is a portable air purifier. The portable air purifier includes: a body; first to third accommodation portions configured to have respective open top surfaces in order to separately accommodate a battery, an air compressor, and water; first to third covers configured to selectively open and close the respective open top surfaces of the first to third accommodation portions; an air inlet connected to the lower portion of the second accommodation portion, and configured to accommodate a pre-filter; a siphon pipe positioned upright inside the water of the third accommodation portion, and configured such that the top thereof is connected to the air outlet of the air compressor; a cannula installed on the top of the third accommodation portion, and configured to supply purified, humidified air to a user; and a power switch configured to control the amount of air to be supplied.

A mouth seal assembly for use with a nasal mask system includes a mouth seal adapted to form a seal with the patient's mouth. The mouth seal is substantially independent from a supply of pressurized air from the nasal mask system. An anti-asphyxia valve may be provided to either the mouth seal over the patient's lips or the nasal mask system. A strap arrangement may support the mouth seal in a desired position on the patient's face in use.

A breathing aid for enabling a person buried by an avalanche to breathe has a housing which includes an inhalation channel comprising a valve situated in the housing, which automatically opens during inhalation and automatically closes during exhalation, and an exhalation channel comprising a valve situated in the housing, which automatically closes during inhalation and automatically opens during exhalation, wherein the inhalation channel and the exhalation channel open into a mouthpiece situated on the housing, and the housing includes at least one inhalation opening into which the inhalation channel opens, wherein the housing is designed as a handle which can be gripped by a user's hand and brought to the mouth.

A breathing aid for enabling a person buried by an avalanche to breathe has a housing which includes an inhalation channel comprising a valve situated in the housing, which automatically opens during inhalation and automatically closes during exhalation, and an exhalation channel comprising a valve situated in the housing, which automatically closes during inhalation and automatically opens during exhalation, wherein the inhalation channel and the exhalation channel open into a mouthpiece situated on the housing, and the housing includes at least one inhalation opening into which the inhalation channel opens, wherein the housing is designed as a handle which can be gripped by a user's hand and brought to the mouth.

A personal entertainment respiratory apparatus provides air to a user to provide a fully immersive entertainment experience. The personal entertainment system may comprise a flow generator for providing the flow of air. A personal spatial respiratory interface may be coupled to the flow generator. The personal spatial respiratory interface may comprise an outlet for the flow generator. The personal spatial respiratory interface may further be configured to direct the flow of air within an ambient breathing proximity of a user. The personal entertainment respiratory apparatus may further comprise a controller and a sensory particle dispenser. The controller and sensory particle dispenser may be configured to selectively activate release of a sensory particle from the dispenser into the directed flow of air in response to an entertainment triggering signal.