The disclosed system comprises a primary air curtain system and one or more optional apparel and/or accessory air curtain subsystem components. The primary system and subsystem(s) are configured to create a directionally controlled air curtain effect that repulses, repels, redirects, neutralizes, and/or disperses airborne infectious pathogens, carcinogens, chemicals, and other contaminants away from the body of a user or a surface susceptible to foreign contamination within a protected enclosure.

The disclosed system comprises a primary air curtain system and one or more optional apparel and/or accessory air curtain subsystem components. The primary system and subsystem(s) are configured to create a directionally controlled air curtain effect that repulses, repels, redirects, neutralizes, and/or disperses airborne infectious pathogens, carcinogens, chemicals, and other contaminants away from the body of a user or a surface susceptible to foreign contamination within a protected enclosure.

An air purifying device (10) for reducing risk of air borne infection. The device has a hollow body having an inlet (14), an outlet (16) and an internal surface comprising a metal oxide layer. A fan (18) moves air through the body in contact with the surface, while a UV source comprises a first section for producing ozone in the air and a second section for producing hydroxyl ions. In one form the device may operate in two modes, a first mode for air purification where ozone output is minimised or not generated at all and a second mode for surface and air sterilisation where ozone output is maximised.

A positive and negative oxygen ion air purification system uses dielectric barrier discharge for rail transport. The system includes: an air intake device including a first damper and second damper, wherein the first damper is in communication with the second damper; an evaporator disposed within the air intake device, wherein gas flowing through the first damper and second damper passes through the evaporator; a purification device, wherein gas flowing through the first damper and second damper passes through the purification device, wherein the purification device includes a mounting plate, a power supply module and an ion generation module, the purification device is disposed on the air intake device by the mounting plate, and the power supply module includes an input end, a transformer, and an output end; a detection device; and a control device connected to the detection device, the air intake device and the purification device.

A positive and negative oxygen ion air purification system uses dielectric barrier discharge for rail transport. The system includes: an air intake device including a first damper and second damper, wherein the first damper is in communication with the second damper; an evaporator disposed within the air intake device, wherein gas flowing through the first damper and second damper passes through the evaporator; a purification device, wherein gas flowing through the first damper and second damper passes through the purification device, wherein the purification device includes a mounting plate, a power supply module and an ion generation module, the purification device is disposed on the air intake device by the mounting plate, and the power supply module includes an input end, a transformer, and an output end; a detection device; and a control device connected to the detection device, the air intake device and the purification device.

Precipitator unit of a two-stage electro filter where air to be cleaned from electrically charged particles is intended to flow through the unit. Said unit comprising at least two cylindrical precipitators (10, 11) that each comprise at least two electrode elements arranged at a gap distance from each other. Each one of the precipitators (10, 11) is also intended to be connected to a high voltage source. The respective electrode elements of a precipitator (10, 11) are connected to different poles of the high voltage source. The main planes of the precipitators (10, 11) are axially spaced in the air flow direction and a cone shaped duct (21) extends between the circumference of the first precipitator (10) and a center opening (13) of the second precipitator (11). A first amount of polluted air flows across the area of the first precipitator (10) and continues afterwards through the inside of the cone shaped duct (21) and out of the unit through the center opening (13) of the second precipitator (11). A second amount of polluted air flows outside the circumference of both the first precipitator (10) and the cone shaped duct (21) in order to be cleaned by the second precipitator (11).

Bipolar ionizer circuit includes a high voltage AC voltage generator having a high potential output and a low potential output, the high potential output being capacitively coupled to respective high potential inputs of a pair of mutually opposite polarity voltage multipliers and the low potential output being capacitively coupled via an auxiliary capacitor to respective low potential inputs of the voltage multipliers. Outputs of the voltage multipliers are connected to respective ionizing electrodes, and an external ion imbalance indicator is connected in parallel to the auxiliary capacitor, which is thereby able to provide automatic balance of the ion current.

A water treatment vessel (10) causes electric discharge in water stored therein to produce a sterilizing factor. The water treatment vessel (10) moves in accordance with the level of water in a reservoir (30) to be switched between a discharging state where the water treatment vessel (10) and the reservoir (30) have no communication, and a pair of electrodes (16, 17) are immersed in water in the water treatment vessel (10) to cause the electric discharge, and a draining state where the pair of electrodes (16, 17) come out of water in the water treatment vessel (10) to stop the electric discharge, and water flows out of the water treatment vessel (10) into the reservoir (30). The water supplier (20) supplies water to the water treatment vessel (10) in the draining state, and stop the supply of water to the water treatment vessel (10) in the discharging state.

A discharge unit includes a discharge electrode, a counter electrode opposed to the discharge electrode, and an insulation member having a surface. The surface is continuous from the discharge electrode to the counter electrode. A wall portion is provided on one side with respect to a discharge region formed by the discharge electrode. The wall portion is configured to suppress a contaminant from adhering to the surface of the insulation member.

An air conditioning apparatus according to an aspect of the present invention includes a main body including a suction part through which air is suctioned and a discharge part through which the air suctioned through the suction part is discharged, a fan disposed in the main body to allow the air to flow, an electric charge device coupled to the main body outside the main body to charge dust in the air, and a filter device disposed between the suction part and the discharge part in the main body to collect the charged dust particles.