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7785404 |
Ionic air purifier with high air flow
An air purifier includes a housing, a high voltage power supply, a first electrode assembly in which a wire-like first electrode is either the only first electrode or, alternatively, is spaced...
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7704302 |
Electrostatic precipitator having a spark current limiting resistors and method for limiting sparking
An electrostatic precipitator including: a collecting electrode in a gas passage; a discharge electrode in the gas passage and separated by a gap from the collecting electrode; a power supply...
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7547353 |
Pulse generating system for electrostatic precipitator
The invention relates to a pulse generating system for generating high voltage pulses to energize an electrostatic precipitator (10), the system including: a first power supply (1) and a second...
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7364606 |
Exhaust emission control device
Provided are a hollow inner electrode constituted by an electrically conductive filter capable of capturing particulates, a cylindrical outer electrode circumferentially surrounding the electrode,...
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6951582 |
Air purifier device
An air purifier device includes a fan unit in an electrically conductive housing for drawing ambient air into the housing via an air inlet, and an electrically conductive dust-collecting member in...
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6839251 |
Apparatus and method for filtering voltage for an electrostatic precipitator
An apparatus and method for controlling voltage applied to an electrostatic precipitator is disclosed. This apparatus includes a pulsating, direct current, voltage mechanism that is operable to...
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6508861 |
Integrated single-pass dual-field electrostatic precipitator and method
An improvement in an electrostatic precipitator and method for removing particulate contaminants entrained in a gas stream passed through an electrode arrangement in which particulates are charged...
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6471752 |
Ionizing structure for ambient air treatment
An ionizing structure for ambient air treatment wherein the structure, optionally having ceiling-mounting provisions, incorporates an ionizing element forwardly directed in the direction of airflow...
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6461405 |
Method of operating an electrostatic precipitator
A method of operating an electrostatic precipitator (7) includes feeding the precipitator with electric power generated by a power supply (10) according to a regime adapted to impart between the...
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6428611 |
Apparatus for removing mist, smoke and particles generated by machine tools
A filter apparatus for use in removing mist, smoke and particles generated by a machine tool includes a mechanical first filtration stage and a second filtration stage consisting of an...
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6282106 |
Power supply for an electrostatic precipitator
In a power supply for an electronic precipitator with a power electronics part, a transformer connected at the output side and a high-voltage rectifier, the transformer and the high-voltage...
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6224653 |
Electrostatic method and means for removing contaminants from gases
An electrical apparatus includes a reaction chamber. A stream of contaminated gasses flows through the chamber. An elongated coronating electrode is positioned in the reaction chamber for producing...
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6063168 |
Electrostatic precipitator
An apparatus for charging an electrostatic precipitator, powered by a power supply and having a plurality of corona electrodes and a plurality of collector electrodes, such that a precipitator...
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6056808 |
Modular and low power ionizer
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6033565 |
System for treating gases or fluids with pulsed corona discharges
System for treating gases or liquids by corona discharge, comprising: a) a corona discharge space through which the gases or fluids to be treated are guided; b) a corona wire inside the corona...
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5972076 |
Method of charging an electrostatic precipitator
A method for charging an electrostatic precipitator, powered by a power supply and having a plurality of corona electrodes and a plurality of collector electrodes, such that a precipitator...
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5639294 |
Method for controlling the power supply to an electrostatic precipitator
Method for controlling, in case of flashover between electrodes in an electrostatic precipitator, the current supply to the electrodes from a controllable high-voltage direct-current source. The...
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5575836 |
Electric dust collector
There is provided a capacitor having an end connected to the ground and the other end connected through a secondary winding of a pulse transformer to the discharge electrode. The ground side...
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5556448 |
Electrostatic precipitator that operates in conductive grease atmosphere
An improved electrostatic precipitator system is provided for use in high-grease atmospheres in which the grease is electrically conductive. The precipitator includes high-voltage insulators that...
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5542967 |
High voltage electrical apparatus for removing ecologically noxious substances from gases
Electrical apparatus for removing ecologically noxious substances from gases which includes an electrical precipitator having a reaction chamber through which a stream of the gases to be cleaned...
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5456742 |
Electric circuit having a convenience outlet for use in a humidifier or an air purifier
An electric circuit is disclosed which includes an electric fan for dispersing air, a power switch for energizing the electric fan, and a convenience outlet for supplying power through the electric...
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5401299 |
Air purification apparatus
Air purification system where air is subjected to complex electrical field resulting from a DC voltage and AC frequency in kilovolt and kilohertz range respectively, applied to screen assembly in...
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RE34346 |
Ionizer
A small personal appliance is wholly contained within a unitary housing that is fully supported by its contact blades being plugged into a wall outlet. The housing includes needles for ionizing the...
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5124905 |
Power supply with feedback circuit for limiting output voltage
A self-resonating power supply for controlling operation of an electrostatic air cleaner wherein the ouput voltage to the cell is limited to a desired value by means of a regulated feedback circuit...
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4911737 |
Apparatus and method for environmental modification
A compact environmental modification apparatus and method are disclosed for selectively supplementing predetermined characteristics of substantially enclosed environments, for example in rooms,...
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4909812 |
Device for power supply of gas-cleaning electrical precipitators
A device for power supply of gas-cleaning electrical precipitators comprises two constant voltage sources (1,2), the unlike poles (5,6) of each of the sources being grounded. Two high-voltage...
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4877428 |
Ionic air cleaner for homes and motor vehicles
The cleaner comprises a substantially cylindrical box-like housing enclosing a high static voltage generator, having at least an input and at least two outputs, one of the outputs being...
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4873620 |
Voltage supply with recovery protection for a thyristor
A voltage supply for an electric filter is disclosed. The supply comprises a high-voltage rectifier, a pulsed voltage circuit including a resonant circuit and a parallel circuit of a thyristor and...
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4872083 |
Method and circuit for balance control of positive and negative ions from electrical A.C. air ionizers
A balancing system for electrical A.C. air ionizers having at least one discharge electrode adjacently spaced from a proximity ground and connected to the high side of an A.C. high voltage power...
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4867765 |
Self-discharge type pulse charging electrostatic precipitator
A self-discharge type pulse charging electrostatic precipitator includes a high-speed switching element through which the electrical charge stored in a condenser is suddenly supplied to the...
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4860149 |
Electronic precipitator control
A method and apparatus for controlling power to a preciptator 27. After each spark the power to the precipitator is reduced to zero, increased along a fast ramp 15 for a fixed period of time and...
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4854948 |
Supply circuit for electrostatic dust separator
The pulse voltage for the electrode (12) of a dust separator (10) is generated by a thyristor circuit (19) to be transferred to a dust separator through a transformer (16). It being possible that...
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4779182 |
Power supply for an electrostatic filter
In order to scrub a waste gas, for example, of foreign matter by means of an electrostatic filter, a power supply is provided which contains a converter whose output feeds the primary winding of a...
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4713093 |
Electrostatic dust precipitator
An electrostatic dust precipitator comprises a separation filter (5) having emitter and collector electrodes (4,6), means (1-3) for maintaining a substantially constant d.c. voltage between the...
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4680533 |
Protection arrangement for switching device of a capacitive load pulser circuit
A method and apparatus for protecting switching elements, and in particular, thyristor switching elements, which are used to supply pulses to a capacitive load, from damage resulting from sparkover...
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4680532 |
False triggering protection for switching device of a capacitive load pulser circuit
A method and apparatus for protecting switching elements, and in particular, thyristor switching elements, which are used to supply pulses to a capacitive load, from damage resulting from false...
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4665476 |
High-voltage pulse power source and pulse-charging type electric dust collecting apparatus equipped therewith
A novel high-voltage pulse power source comprising an ON-OFF type high-voltage switch element, as high-voltage switch element, which can be reset in OFF state immediately after an ON action, and a...
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4654772 |
Power supply for electrostatic air cleaner
A power supply for an electrostatic air cleaner incorporates a high frequency oscillator and a step-up transformer. The transformer includes a primary winding in series with a transistor, a...
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4651264 |
Power supply with arcing control and automatic overload protection
A power supply with automatic arcing control and overload protection includes an electronic switch in an oscillator circuit with a primary winding of a step-up transformer. A high voltage,...
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4601733 |
High voltage generator for an electrostatic dust precipitator
A high voltage generator 1 for an electrostatic dust precipitator 2 comprises a low voltage oscillator 6, operating from a low voltage continuous source, such as a car battery, which supplies a...
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4600411 |
Pulsed power supply for an electrostatic precipitator
A method and apparatus for generating a supply of pulsed power to an electrostatic precipitator where a residual collection field is maintained on the electrodes during interpulse periods while, in...
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4587475 |
Modulated power supply for an electrostatic precipitator
In an electrostatic precipitator system powered by a primary power source, the power supply has a converter and a high voltage device. The converter can be coupled to the primary power source for...
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4567541 |
Electric power source for use in electrostatic precipitator
An electric power source for use in an electrostatic precipitator includes a first high voltage DC source having an output terminal adapted to be connected to discharge electrodes of the...
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4562522 |
Power supply for an electrostatic air cleaner with a modulated pulse width voltage input having a backup pulse width limiting means
A power supply usable with various size loads has an input circuit receiving pulses of voltage at 25 kilohertz. The pulses are modulated in width depending upon the input to a pulse-width...
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4559594 |
Electrostatic air cleaner and high voltage power source therefor
Electrostatic air cleaner apparatus is disclosed for use in conjunction with existing space conditioning apparatus which includes a transformer providing a low voltage (typically 24VAC) power...
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4558404 |
Electrostatic precipitators
A circuit for applying unidirectional pulses to a precipitator, in addition to a base d.c. level supplied by a transformer/rectifier set, includes a rectifier, an inverter and a...
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4486704 |
Control device for an electrostatic dust separator
A control device for an electrostatic dust separator (10,11) intended to control in relation to the recorded level of direct current (104) and direct current voltage (102) in the dust separator and...
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4400662 |
Method and apparatus for energizing an electrostatic precipitator
A method and apparatus for providing a pulse-generating control to energize the electrodes of an electrostatic precipitator which includes means for producing a voltage between the electrodes of...
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4376642 |
Portable air cleaner unit
The invention relates to a portable air cleaner unit which includes a casing having an air inlet and an outlet and defining an air cleaning path between the inlet and outlet. A prefilter is...
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4326860 |
Ripple insensitive electric precipitator
A control system for automatically maintaining a maximum output voltage across the electrodes of a precipitator under varying load conditions without requiring manual readjustment of sensitivity...
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