30 results about "Environmental air flow" patented technology

A cannula receives respiratory airflows and ambient airflows; a differential pressure transducer determine pressure differentials between the respiratory airflows and the ambient airflows; and a ventilator responds to the pressure differentials. Another receives respiratory airflows and interface airflows; a differential pressure transducer determine pressure differentials between the respiratory airflows and the interface airflows; and a ventilator responds to the pressure differentials. And another receives respiratory airflows from a subject and interface airflows from an area near a cannula; a differential pressure transducer determine pressure differentials between the respiratory airflows and the interface airflows; and a ventilator responds to the pressure differentials. Corresponding respiratory monitoring methods receive, determine, and control the same.

An assembly that facilitates the use of modules requiring orthogonal airflow in a chassis providing normal airflow. Partitions within the housing direct ambient airflow from the front air inlet, through the modules, and out the rear air exhaust. The housing and partitions define first and second vertically and horizontally offset slots for receiving first and second orthogonal airflow modules, and also define separate first and second airflow pathways. The first airflow pathway provides airflow through a front air inlet, under the second module, orthogonally through the first module and out the rear air exhaust. Similarly, the second airflow pathway provides airflow through a front air inlet, over the first module, orthogonally through the second module and out the rear air exhaust. Both airflow pathways both draw ambient air into the housing and exhaust warm air from the rear of the housing, while keeping the two airflow pathways separated.

A vehicle includes a body and an active air dam assembly. The body has a first end facing an ambient airflow and a second end facing away from the ambient airflow. The assembly is disposed at the first or second end and controls the ambient airflow between the body and a road surface. The assembly includes an adjustable flap, an actuator, sensors, and a controller. The flap shifts between different stowed and deployed positions. The actuator moves the flap, e.g., via a shaft. Each sensor measures a separate performance parameter of the actuator. The controller executes a method to receive the measured performance parameters, identify a fault mode of the air dam assembly from among different possible fault modes using the performance parameters, and execute a control action corresponding to the identified fault mode.

An attachment system for attaching at least one exhaust diffuser (26) downstream from a turbine assembly (12) in a gas turbine engine is disclosed. The attachment system may include at least one attachment flange (134) extending from a downstream edge (132) and attached to a spring plate diffuser support structure (202) and at least one attachment flange (134) extending from side edges of the exhaust diffuser (26) to couple sections of the exhaust diffuser (26) together. The diffuser (26) may also include a thermal barrier/cooling system (44) for controlling a temperature of an outer case (11) of the gas turbine engine. The thermal barrier/cooling system (44) may form a flow path for an ambient air flow cooling.

A vertical tail unit (7) for flow control including: an outer skin (13) in contact with an ambient air flow (21), wherein the outer skin (13) extends between a leading edge (23) and a trailing edge (25), and surrounds an interior space (29), and wherein the outer skin (13) includes a porous section (31) in the area of the leading edge (23), a pressure chamber (15) arranged in the interior space (29), wherein the pressure chamber (15) is fluidly connected to the porous section (31), an air inlet (17) provided in the outer skin (13), wherein the air inlet (17) is fluidly connected to the pressure chamber (15), wherein the air outlet (19) is fluidly connected to the pressure chamber (15). The vertical tail unit (7) has reduced drag and an increased efficiency because the air inlet (17) is formed as an opening (35) in the outer skin (13) at the leading edge (23).

In a method and apparatus for conditioning air for an enclosure, a first ambient air stream is cooled by the cooling coil of a refrigerant cooling system to reduce its temperature and humidity content. The thus cooled and dehumidified air is then passed through a segment of a rotating desiccant wheel to reduce moisture content and increase temperature and is then supplied to the enclosure. The desiccant wheel is regenerated by the use of a second ambient air stream which is first heated with the condenser coil of the refrigerant system and then passed through the regeneration segment of the desiccant wheel. A bypass plenum is provided in the apparatus that selectively allows a third ambient air stream to be cooled in the plenum independent of the evaporator coil and desiccant wheel in thefirst plenum. That air stream is then supplied with the air treated in the first plenum to the enclosure.

The invention relates to a mobile high-temperature smoke and exhaust gas flow field control device. The control device is characterized of being of a cover body structure and comprising a flow field driving system and a heat energy flow guide system. A mobile high-temperature smoke and exhaust gas flow field control technology method comprises the following steps: enabling the flow field driving system and the heat energy flow guide system to synchronously work; keeping the flow field driving system in a negative pressure working state and keeping the heat energy flow guide system in a working state that the positive pressure is gradually reduced and the negative pressure is gradually raised; enabling environmental air flow to sequentially enter the flow field driving system; performing the positive pressure driving and the negative pressure guide driving of a smoke and exhaust gas purifying system to enable the air flow to flow into the surrounding areas of a sieve through a desulfurizer size water curtain; finally discharging the air flow into a coke tank of a coke quenching compartment for high-level desulphurization and dust removal. With the adoption of the device and technology method, the air volume of the smoke and exhaust gas purifying system can be greatly reduced, the solid and liquid particle pollution can be effectively controlled through the purifying system, and the practical significance of energy conservation, emission reduction and low operation cost is realized.

A raincap precleaner (12) is provided according to the present invention. The raincap precleaner includes a sleeve (34), a cover (32), and a precleaner assembly (36). The sleeve is constructed for mounting on an air intake stack and has an air intake flow region for delivering intake air to the air intake stack. The cover includes a top portion (44) having an annular circumference and a depending flange portion (46) extending from the annular circumference of the top portion. The cover is arranged relative to the sleeve to provide a precleaner area and a precleaned air chamber. The precleaner assembly is provided extending around a periphery of the sleeve and in the precleaner area so that environmental air flows through the precleaner assembly and into the precleaned air chamber, and from the precleaned air chamber into the air intake flow region. The precleaner assembly comprises a plurality of inertial separators (70). A method for precleaning air and a motor vehicle are provided.

The invention discloses a bearing retainer rotating speed measuring system comprising a sensor module which comprises a magnetic film fixed on the end face of a retainer and a magnetoresistive sensorused for receiving a magnetic signal; an acquisition module which is used for acquiring the magnetic information received by the magnetoresistive sensor and transmitting the magnetic information to the signal processing module; a processing module which is used for carrying out time-frequency analysis on the magnetic signal so as to calculate the amplitude and the frequency of the magnetic data signal, obtain a frequency domain oscillogram of the magnetic data signal and calculate to obtain the rotating speed of the retainer through waveform analysis; on the premise that the structure of the retainer is not damaged, the rotating speed is accurately measured, operation is stable, wave loss is avoided, the measuring system has the advantages of being insensitive to oil mist, vibration, environmental airflow and the like, and the measuring system is further provided with a verification sensor for verifying the stall and wave loss phenomena.

This application discloses a wind pressure-driven air intake device for natural ventilation of zero power consumption. Such a device comprises multiple tunnels being arranged around a common central chamber, each having an inflow valve at its inner end connecting the central chamber and an outer end open to ambient airflow. The inflow valve allows only inward flow from a corresponding tunnel into the central chamber. The central chamber has an opening allowing airflow exit to a space to be ventilated. The device is capable of capturing ambient wind flow and wind pressure to be fed to the vented space regardless of wind flow direction towards the device, with no need for a powered air driver.

The invention provides a movable exhaust hood which comprises a fixed exhaust hood. The fixed exhaust hood is connected with the movable exhaust hood, and rolling wheels are installed at the lower portion of the movable exhaust hood and located on guide rails. A motor is arranged on the movable exhaust hood, and limiters are arranged on the guide rails. A sealing brush is arranged at the position where the movable exhaust hood is combined with the fixed exhaust hood. The movable exhaust hood is provided with an oppositely-opening door. The shortcoming that the local exhaust hood is largely influenced by indoor air flows and close to a harmful pollution source is overcome, the movable exhaust hood is fixedly installed above or around a device, the defects of material adding or maintenance are overcome, small air exhausting amount is achieved, the noxious substance control effect is good, and the movable exhaust hood is not influenced by environmental air flows and is convenient to operate and high in automation degree.

The invention relates to the technical field of medical protective headgear, and discloses a medical positive pressure type protective headgear device which comprises a headgear part, a headband body and an air feeder, the air feeder is used for conveying positive pressure airflow, the headgear part is arranged on the headband body in a sleeving mode and comprises a mask part, and an air conveying air channel and a main air channel are formed in the headband body. The air conveying air duct is communicated with the main air duct, and the main air duct is communicated with the air feeder; the head hoop body is provided with a head air supply outlet and a face air supply outlet, the head air supply outlet and the face air supply outlet are communicated with the air conveying air channel, the head air supply outlet faces the head, and the face air supply outlet faces the mask part. After the work of the medical staff is finished, the head band body can be replaced, the head band body does not need to be disinfected, and the working intensity of the medical staff is reduced; positive-pressure airflow is conveyed to cool the head, meanwhile, the mask portion is demisted, sight is prevented from being affected, the positive-pressure airflow effectively prevents environment airflow from entering, bacterial infection is avoided, and work safety is improved.

A dehumidifier assembly includes an extraction chamber coupled in flow communication with a sample air inlet, a sample air outlet, and a sample drip opening. The extraction chamber is configured to receive a sample air flow therethrough at substantially atmospheric pressure from the sample air inlet to the sample air outlet. The dehumidifier assembly also includes a conduit positioned within the extraction chamber. The conduit is coupled in flow communication with an environmental air inlet and an environmental air outlet, and is sealed with respect to the extraction chamber. The dehumidifier assembly further includes a circulator coupled to the environmental air outlet. The circulator is operable to create a negative pressure in the conduit, such that an environmental air flow is drawn through the environmental air inlet into the conduit. The conduit is configured to facilitate heat transfer from the sample air flow to the environmental air flow.