30 results about "Breathing zone" patented technology

An airflow system is provided for a welding helmet. The airflow system includes an air intake (16) with a filter, a blower, and a battery mounted to the rear of headgear for a welding helmet. A manifold wraps around the side and front of the headgear and directs air from the- blower to the front of the headgear. The manifold includes a lower vent (26) for directing air onto a user's face and an upper vent (30) for directing air over a user's head toward the rear of the headgear. The vents are intended to create positive pressure to impede the entry of unfiltered air into the user's breathing zone. The manifold further includes a portion of flexible tubing (22) for adjusting the size of the airflow system in conjunction with adjustment of the headgear diameter. The airflow system generally conforms to the structure and shape of the headgear to maintain a location close to the user's head.

An apparatus for use in creating a zone of conditioned air on or near a person's body comprising: a blower unit configured to produce a flow of conditioned air; an air delivery system that is detachably connected to and is in flow communication with the blower unit, the said air delivery system having at least one outlet for discharging air.

This patient isolation module has a transparent cubicle mounted over an hospital bed. This cubicle has a rectangular room-air intake opening at one end thereof, and an air treatment unit mounted outside the other end. The air treatment unit has fan inlet openings communicating inside the cubicle and forming a crown over the head of the bed. The air treatment unit draws air from the cubicle and causes a stream of fast-moving air to move along the cubicle, in a toe-to-head direction relative to a patient laying in the hospital bed. The air stream defines a hood-shaped envelope extending over and along both sides of the bed, to better separate a patient's breathing zone from health-care workers standing near that patient's bed.

The invention provides a wearable air purification device which actively generates a propelled stream of purified air for direct delivery to a region proximal to a user's mouth or nose for their immediate inhalation. An air chamber comprises a flexible diaphragm adapted to fluctuate between two extreme positions, thereby altering the volume within the chamber and alternately sucking and blowing air into and out of the chamber. Filtration elements are arranged in said air chamber. The filtration elements are arranged so as to make fluid communication with air displaced into the air chamber and, to make fluid communication with air displaced out of said chamber so that air is cleaned as it passes both into, and out of, the air chamber. The filtration elements actively remove particulate or gaseous pollutants. Embodiments of the invention may comprise a plurality of such air chamber assemblies, arranged so as to collectively deliver a continuous flow of air to a breathing zone of the user.

The invention relates to a real human body breathing simulation device and method. The device comprises an exhaling pump, an inhaling pump and a heater system; a main body of the exhaling pump is a sealed gas cylinder, the interior of the gas cylinder is provided with a sealed piston, and the piston is connected with a rack through a bolt; a stepping motor outside the gas cylinder is in cooperative connection with the rack through a gear; a DSP controller is connected with a driver through a control line, and the driver is connected with the motor through a driving guide line; the other side of the gas cylinder is provided with two vent holes, and vent pipes of the two vent holes are connected with the gas cylinder through one-way valves respectively; the exhaling pump has the same structure as the inhaling pump while the tail end part of one vent pipe of the exhaling pump is provided with a heating element; a power supply is connected with the heating element by a time relay. Experimental errors brought by a conventional human body breathing device are overcome. The real response degree of experiment working conditions on real working conditions is improved, a pollution exposure level and a spreading rule of a human body breathing zone can be accurately reflected, and an important role is played for improving the building indoor air quality.

The invention discloses an air-conditioning system provided with a bottom supply and top return air flow channel for a civil airplane cabin. The air-conditioning system comprises air supply openings, air return openings and an environment control system of the civil airplane cabin. The air supply openings are formed in the bottoms of passenger seats and the aisle floor of the cabin. The air return openings are formed in the top or / and the side wall of the civil airplane cabin. The air supply openings are connected with an air supply pipeline of the environment control system of the civil airplane cabin, and the air return openings are connected with an air return pipeline of the environment control system of the civil airplane cabin. The air supply openings in the aisle floor of the cabin are set to be normally open. A pressure control air supply system is arranged at the lower parts of the passenger seats, and an air quantity control system is arranged at the upper parts of the passenger seats. Fresh air is supplied to the air supply openings in the bottoms of the passenger seats through the environment control system of an airplane, then is entrained to a breathing zone through the heat plume of passengers and finally is supplied to the air return openings in the top of the civil airplane cabin, and therefore the air flow channel is formed. Compared with traditional air flow distribution of the civil airplane cabin, the air-conditioning system has the advantages that pollutants can be removed more efficiently, and the energy consumption of fresh air treatment of the environment control system can be lowered.

This invention relates in general to methods and devices for displacing body convection and thereby reducing exposure to allergens and other airborne fine particles within a personal breathing zone during situations of or corresponding to sleep thereby reducing or removing symptoms of asthma and allergic rhinitis while improving quality of sleep and in particular to methods and devices that utilize Temperature controlled Laminar Airflow (abbreviated TLA from herein and onwards). Also, business methods involving such methods and devices are disclosed.

A camera-based self-adaptive multi-scale respiration monitoring method relates to the technical field of video image signal recognition and processing. To solve the problem that the existing single image scale cannot obtain the local optimal respiratory signal and the global optimal respiratory signal, the steps are: (1), using the camera to collect the respiratory monitoring object in real time; (2), the video image collected by the camera Carry out multi-scale regular pre-segmentation, and perform local respiratory signal recognition and extraction on each pre-segmented unit area at each scale; define the unit area with local respiratory signal output as the target area; (3), pre-segmented each scale The local respiratory signals extracted from the target area are compared, the optimal segmentation scale is determined according to the quality of the local respiratory signal, and the partial respiratory signal extracted from the target area under the optimal segmentation scale is output as the monitoring respiratory signal. The optimal segmentation scale is adaptively determined according to the quality of the breathing signal, so as to accurately obtain the optimal breathing area and the global optimal breathing signal at multiple scales from the monitoring video of the breathing monitoring object, and improve the reliability of the camera's non-contact monitoring of the breathing signal.

The invention provides a method for preparing carbon fiber cloth material capable of effectively purifying air by utilizing the sol-gel process. The method is characterized by comprising the following steps of: preparing a compound containing titanium element into sol, and coating on activated carbon fiber cloth; and then turning the sol into gel, and performing heat treatment on the carbon cloth with the gel. The method has the advantages of preparing the carbon fiber cloth with uniform distribution, stable anatase-structure phase and appropriate TiO2 content, wherein TiO2 is doped with rare-earth element, thereby being conductive to the modification of TiO2 and the improvement of the sterilization rate; simultaneously, by adopting the manufacturing method, the cost is reduced, the air purifying performance of the carbon fiber cloth is improved, the nano TiO2 is firmly combined with the carbon fiber cloth, and no shedding happens when wind blow-sweeping can be performed continuously for 240 hours at a high wind speed. The method not only has innovative significance for the preparation of environment-friendly material, but also has the promoting effect on the theory and practices of the field of environment-friendly material. The carbon fiber cloth coated with the nano TiO2 has the effect of removing ozone in a breathing zone; simultaneously, the removal rate of white staphylococcus polluted artificially is as high as 99.97%; the average removal rate of natural bacteria in indoor air in an unmanned state is 95.34%; and the ultraviolet radiation intensity is 217.8-230.5 mu m / cm<2>. The carbon fiber cloth containing TiO2 can be widely used in indoor air purification, can improve the air quality, is conductive to environmental protection and can create economic and social benefits.