An example apparatus for charge neutralization includes: a first emitter nozzle; a power supply configured to supply a high frequency alternating current (AC) signal to the first emitter nozzle; control circuitry configured to: provide a polarity signal to the power supply to generate a DC offset signal, wherein a combination of the high frequency AC signal and the DC offset signal causes the power supply to output a positive ion generation pulse or a negative ion generation pulse; control the polarity signal to cause the power supply to provide a period of positive ion generation and a period of negative ion generation; determine a balance voltage at an output of the first emitter nozzle; and control the polarity signal to adjust a relative durations of the period of positive ion generation and the period of negative ion generation based on the balance voltage.

A medical mask restoring device (1) includes an electric corona radiating net (2) producing an electric corona, an ion transmitter (12) connected with the electric corona radiating net, and at least one electricity supply (11) connected with the ion transmitter. Thus, the medical mask restoring device provides a restoring effect to the medical mask (A).

A medical mask restoring device (1) includes an electric corona radiating net (2) producing an electric corona, an ion transmitter (12) connected with the electric corona radiating net, and at least one electricity supply (11) connected with the ion transmitter. Thus, the medical mask restoring device provides a restoring effect to the medical mask (A).

A device for ionising air includes a case, in which there are a blower, which includes a rotor to generate a pulsed airflow and an exhaust pipe to channel this flow; a device for producing ions, which includes a high-voltage electrical generator; an electrode connected to the generator and of which one free end, formed of a cluster of filaments made of conductive material, extends to the right of the exhaust pipe to release ions there by corona discharge. The device further includes a diffuser provided with a pipe which, in the extension of the exhaust pipe, delimits a compression chamber, with an expander which extends the pipe and includes a series of channels which extend form an inner face of the expander to an opposite outer face.

A device for ionising air includes a case, in which there are a blower, which includes a rotor to generate a pulsed airflow and an exhaust pipe to channel this flow; a device for producing ions, which includes a high-voltage electrical generator; an electrode connected to the generator and of which one free end, formed of a cluster of filaments made of conductive material, extends to the right of the exhaust pipe to release ions there by corona discharge. The device further includes a diffuser provided with a pipe which, in the extension of the exhaust pipe, delimits a compression chamber, with an expander which extends the pipe and includes a series of channels which extend form an inner face of the expander to an opposite outer face.

A receiver device of energy from the earth and its atmosphere for providing a supply of electric power.

Effective component generation device includes internal component and case. Internal components include discharger that generates an effective component. Case is formed in a box shape having discharge port through which an effective component is discharged, and houses internal components. Case includes metal body including a bottom plate and peripheral walls surrounding at least discharger in internal component. Metal body has seamless portion at a corner portion between two surfaces of adjacent peripheral walls oriented in different directions. As a result, there is provided effective component generation device capable of suppressing electromagnetic noise radiated to the outside of case and reducing an influence of electromagnetic noise to the outside.

A bipolar ionizer comprising an electronic circuit, microprocessor, and step-up transformer providing high-voltage signals to carbon-fiber electrodes producing bipolar ion concentrations greater than +/−200 million ions per cubic centimeter. The bipolar ionizer monitors, reduces, and converts high-voltage signals to feedback signals used by the microprocessor to vary a frequency and a duty cycle of a digital signal to control an excitation signal for a step-up transformer output voltage to consistently maintain an unbalanced high-voltage output ratio less than 80 percent, balanced bipolar ion concentration ratio greater than 80 percent, and zero ozone concentration over a range of electrical signal inputs. The microprocessor calculates and reports bipolar ionizer concentrations based on feedback signals. The microprocessor monitors concentrations of Volatile Organic Compounds (VOCs) in an airflow serving the bipolar ionizer and adjusts the positive/negative DC high-voltage signals and bipolar ion concentration when VOC concentrations are above a threshold.

An airflow generation device having a first dielectric substrate made from a rubber elastic material, a first electrode on or near by a first surface of the first dielectric substrate, a second electrode on a second surface, and a second dielectric substrate made from a rubber elastic material covering the second electrode. It makes the airflows generated by plasma caused from partial gas near by the first surface through applied voltage into the first electrode and the second electrode, and bonding portions between the first electrode and the second electrode and the first dielectric substrate, bonding portions between the second electrode and the second dielectric substrate, and bonding portions between the first dielectric substrate and the second dielectric substrate are bonded by chemical bonds with chemically crosslinking.

Effective component generation device includes internal components, case, and air passage member. Air passage member is housed in case and surrounds discharger. Air blower of internal components generates air flow that outputs an effective component to the outside. Air passage member has upstream block and downstream block. Upstream block forms air supply passage on the upstream side. Downstream block forms air discharge passage on the downstream side. Air passage member includes air supply passage and air discharge passage in case, and forms air passage through which air flow passes. This provides effective component generation device capable of efficiently generating air flow that outputs an effective component to the outside of case.