Abstract:
The invention relates to a fluid displacement device (2) configured for generating a flow within a fluid. The fluid displacement device comprises an airflow duct (4) with an inner surface (4C) configured to accommodate a flow of fluid. A number of corona electrodes (6A) is disposed in the airflow duct wherein each of the corona electrodes comprises an elongated body (6A2) with a distal end (61) and a proximal end (62). The distal end is provided with a tip structure (6A1) configured to generate a corona discharge. A non-corona electrode (6B) is disposed downstream the corona electrodes, the tips (6A1) of the corona electrodes (6A) are positioned at a predefined distance (d) from the non-corona electrode (6B), and the proximal end joins the inner surface of the airflow duct (4) at a distance from the non-corona electrode which is longer than the predefined distance d.
Abstract:
An apparatus for conditioning an emitter electrode (e.g., 208, 308, 408, 508, 608, 706) in electrohydrodynamic fluid accelerator (e.g., 920) and precipitator devices via movement of a conditioning device (e.g., 200, 500, 600, 700) including complementary contoured conditioning surfaces (e.g., 204, 206, 304, 306, 404, 406, 504, 506, 702) positioned to frictionally engage and elastically deform the emitter electrode. The opposing conditioning surfaces laterally distort an otherwise linear longitudinal extent of the electrode under tension. The opposing conditioning surfaces are subject to wear, but maintain frictional engagement despite wear depths that exceed a radius of the electrode due at least in part to the at least partially complementary surface contours engaging the electrode under tension. The conditioning device causes respective conditioning surfaces to travel along a longitudinal extent of the emitter electrode to condition the electrode to at least partially mitigate ozone, erosion, corrosion, oxidation, or dendrite formation on the electrode.
Abstract:
A ground electrode (5) is placed in an outer shell (2) to form a flow path (8) through which a gas containing particulate matters is caused to flow. A dust collection filter layer (6) is provided adjacent to one side of the ground electrode (5). Discharge sections (4) of discharge electrodes are arranged on the other side of the ground electrode (5) with the heads (4a) of the discharge sections (4) separated from each other in the direction transverse to the flow path (8). A voltage for producing an ion wind that induces and forms a secondary flow to the gas is applied to the discharge sections (4). The ground electrode (5) has an open area ratio that causes the secondary flow to pass along a flow-path cross-section that crosses the flow of the gas. The dust collection filter layer (6) has an open area ratio that causes the secondary flow to pass along the flow-path cross-section that crosses the flow of the gas and to pass in the direction of the flow of the gas that flowed in the inside.
Abstract:
The invention is related to an inflammation- and explosion-protected plasma-generating device (1) for the treatment of air, wherein the plasma is at least partially encased by a wire mesh, the wire mesh being dimensioned suchlike to allow for prevention of a flame to escape the housing. The invention is especially useful in order to fulfil the safety and security requirements for aviation purposes, especially civil aircrafts.
Abstract:
An electro-kinetic electro-static air conditioner with a bead member having a bore, through which a wire-like electrode passes. The bead is moved along the wire to frictionally clean the wire-like electrode when an electrode array is removed. A bead lifting arm is mounted to the electrode array. The bead lifting arm can move the bead to clean the electrode as the electrode array is removed from the air conditioner for cleaning. The electro-kinetic electro-static air conditioner has insulated parts which protect against high voltage arcing and conductive deposits relative to the electrodes.
Abstract:
An environmental sensor is used to determine a voltage output for a high voltage generator used along with first and second electrodes in an air transporter-conditioner system. In one embodiment, the environmental sensor is a particulate detector. If a low level of particulate is detected, a low output level can be used. If a high level of particulate is detected, a high output of the generator can be used. The environmental sensor can be also used as an ozone detector or a passive IR detector.
Abstract:
An air treatment system includes a wire-like corona electrode (K) and an air permeable target electrode (M) arranged concentrically around the corona electrode. The electrodes are connected to a d.c. voltage source (3) having a voltage causing a corona discharge at the corona electrode and an ion wind through the target electrode. The target electrode may have a substantially cylindrical configuration, in which case air flows axially into the target electrode through one or both of the open ends thereof and exits from the target electrode radially through its air permeable wall. The target electrode may also be divided into two or more separate parts (M1, M2) arranged essentially concentrically around the corona electrode (K) in mutually uniform spaced relationship. In such a case air flows essentially radially inwards through the interspaces between the different target electrode parts (M1, M2) and exits in essentially radial direction through said parts.
Abstract:
Electrokinetic transducing method and system are disclosed in which the two electrode arrays (14, 16) confront each other and each electrode in one array (14) is equidistant from the two nearest electrodes in the other array (16). The electrode arrays are excited by pulsed exciting voltages, the individual pulses of which are preferably all negative or all positive, have durations equal to or less than the pulse intervals, and have rounded leading knees. Embodiments of the invention are disclosed for applications including electrokinetic loudspeakers, ion generators, fans and electrostatic precipitators.