A collecting electrode element for an electrostatic air cleaner with a reduced weight can be constructed with a lightweight conductive core sandwiched between particle collection layers which are supported and stabilized by a rigid frame. The conductive core may be conductive foil, conductive film, conductive ink, or conductive glue. The particle collecting layers may be flexible open-cell foam such as melamine which may be compressed between opposing frame elements. The frame may leave most and preferably at least 90% of the surface of the particle collecting layers exposed. The frame may have opposing frame elements secured to each other at a compressed area of the particle-collecting layers.

A collecting electrode element for an electrostatic air cleaner with a reduced weight can be constructed with a lightweight conductive core sandwiched between particle collection layers which are supported and stabilized by a rigid frame. The conductive core may be conductive foil, conductive film, conductive ink, or conductive glue. The particle collecting layers may be flexible open-cell foam such as melamine which may be compressed between opposing frame elements. The frame may leave most and preferably at least 90% of the surface of the particle collecting layers exposed. The frame may have opposing frame elements secured to each other at a compressed area of the particle-collecting layers.

Easy-Air (-) Ion Generator: The present invention provides an electric device that creates ‘corona discharge’ for cleaning the air from airborne/atmospheric particulate matter including gaseous and biological contaminates. The invention uses high voltage DC current that performs two functions/phases: (1) The first function has two pairs of positive and negative polarity, therein for building a force field between the metal plates for attracting airborne particles, gaseous and biological contaminates that are incinerated. SEE FIG. #1. (2) The second function has negative current wires that goes across the force field, which comes into contact with the filtered air separating negative ions that flow into the room or local area. SEE FIG. #2. The negative ions attach themselves to any particulate matter including soot, tobacco smoke, smog, oil smoke, fly ash, cement dust, suspended atmospheric dust, settling dust, and heavy dust and with its increased molecular weight and pulls the particulate matter to the ground or surface reducing/related atmospheric particulate matter to enhance air quality. Any related airborne/atmospheric particles with a heavier molecular weight due to the negative ionization process are also attracted to the positive current force field and are re-filtered to enhance air quality. SEE FIG. #1. Additionally, the corona discharge is used to split the diatomic oxygen molecule into valent oxygen atoms. These oxygen atoms have a negative charge and will bond quickly with another oxygen molecule to produce ozone. For each split oxygen molecule 2 ozone molecules are produced. SEE FIG. #2.

An electronic air filter having a plurality of electrodes supported by rigid fixtures that are attached to a common case. The rigid fixtures that support the electrodes with different electrical potentials are attached to each other or to a common body in a way that increases or maximizes the creeping discharge path along the surface. Even conductive contaminants do not, therefore, provide an electrical shortage between the electrodes.

An electronic air filter having a plurality of electrodes supported by rigid fixtures that are attached to a common case. The rigid fixtures that support the electrodes with different electrical potentials are attached to each other or to a common body in a way that increases or maximizes the creeping discharge path along the surface. Even conductive contaminants do not, therefore, provide an electrical shortage between the electrodes.

An electrostatic device, for example, an electrostatic air cleaner, may be provided with a corona discharge electrode; a collecting electrode; a power source connected to the corona discharge electrode and to the collecting electrode; an electrical parameter sensor; and a power supply system. The control system may receive a signal from the electrical sensor. The control system evaluates the electrical performance of the system and initiates appropriate or corrective action.

An electrostatic air cleaner may include a corona charging stage, a precipitation stage, and an air mover (fan). The corona charging stage may include a first and second array placed under electrical potential difference capable of generating a corona discharge. The first array may be substantially parallel corona wires and may be located downstream of an air penetrable second array. The precipitation stage may be downstream from the corona charging stage. The spacing between the first array and the second array may be less than the distance of the precipitation stage to the second array. The air mover may be upstream of the corona charging stage or downstream of the precipitation stage or between these stages. The arrangement allows for higher ion output downstream of the first array with the same voltage and power consumption resulting in greater particle charging and better air cleaning efficiency.

An electrostatic air cleaner may be operated according to a manner designed to achieve acceptable air quality while balancing power usage and corona electrode degradation levels. The voltage applied to the corona electrode(s) may be controlled as well as the voltage applied to repelling electrodes and air flow velocity. The air cleaner may also be operated to achieve desired particle separation.

Particle measurement apparatus comprises an inlet for receiving a gas sample for analysis, a photoionisation chamber, at least one light source arranged to illuminate an interior of the photoionisation chamber, first and second electrodes coupled to a power source and configured to provide a DC potential difference across at least a portion of the photoionisation chamber, and an outlet, together defining a gas flow path from the inlet, through the photoionisation chamber, and towards the outlet.

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.