A wearable air purifier includes at least one wearable component, a control unit, at least one speaker assembly and at least one negative ion generating component. The control unit is disposed inside the at least one wearable component. The at least one speaker assembly is disposed on the at least one wearable component and electrically connected to the control unit. The at least one negative ion generating component is disposed on the at least one wearable component and electrically connected to the control unit. The control unit provides high-voltage currents to the at least one negative ion generating component to enable the at least one negative ion generating component to emit negative ions by corona discharging, and the control unit further provides audio signals to the at least one speaker assembly to activate the at least one speaker assembly to generate sound.

A gas cleaning system includes an inlet receiving a gas, an outlet spaced apart from the inlet, a gas channel defined between the inlet and the outlet to direct the gas from the inlet to the outlet, a photoionizer disposed to emit radiation towards a portion of the gas channel, and a first electrode module. The first electrode module includes a first discharge electrode assembly that generates a corona discharge within the gas channel and a first collection electrode assembly that collects ionized particles from the gas in the gas channel.

An electrostatic collector including: a collection chamber delimited by a tubular wall oriented along a first axis; a collection electrode configured to be disposed inside the collection chamber against the wall; a discharge electrode, of elongate form, that extends along the first axis and includes an end, in a shape of a tip, the end being disposed opposite the collection electrode; a first part of a first diameter, emerging on the tip-shaped end, a second part of a second diameter, the second diameter being greater than or equal to twice the first diameter, the second diameter for example being between 2 and 6 times the first diameter; and a sudden widening, extending between the first part and the second part.

An electro-ionic device configured for being worn on the face of a person is disclosed. The electro-ionic device includes at least two electrical conductors spaced apart from each other defining at least a portion of a respiratory pathway therebetween and a circuit configured to apply a first voltage between the two conductors during inspiration and a second voltage greater than the first voltage during expiration.

An electrification apparatus for dust collection includes an electrification module configured to generate an ion emitted to air and comprising: at least one discharge tip configured to emit the ion in a direction opposite to a flow direction of the air, at least one tip holder supporting the discharge tip, a conductive plate generating a potential difference with the discharge tip, and a frame defining an appearance of the electrification module and supporting the tip holder and the conductive plate. The frame comprises an upper frame disposed at an upper side of the conductive plate and a lower frame disposed at a lower side of the conductive plate, the tip holder is disposed between the upper frame and the lower frame, and an upper surface of the tip holder is coupled to the upper frame and a lower surface of the tip holder is coupled to the lower frame.

A charger includes: a first opposed electrode and a second opposed electrode disposed at mutually opposed positions; a discharge electrode between the first opposed electrode and the second opposed electrode; and a power supply unit that applies a voltage to at least one of the first opposed electrode, the second opposed electrode, and the discharge electrode. A first period in which a first charging region is formed between the first opposed electrode and the discharge electrode and a first non-charging region is formed between the second opposed electrode and the discharge electrode, and a second period in which a second non-charging region is formed between the first opposed electrode and the discharge electrode and a second charging region is formed between the second opposed electrode and the discharge electrode are repeated periodically. In the first charging region and the second charging region, particles are charged to the same polarity.

A cooking fume purification module and a cooking fume exhaust device are provided. The fume purification module includes a housing, a plurality of dust collection plates and an emitter plate. The housing includes a cylindrical body and a plurality of protruding portions. The body defines an air channel. The plurality of protruding portions extends outwards from the body, and each protruding portion defines an introduction channel in communication with the air channel. The emitter plate is arranged on the protruding portion and provided with a plurality of emitter pins which are located in the introduction channel and face the air channel. The plurality of dust collection plates are arranged in the air channel and spaced apart along an axial direction of the body, and each dust collection plate corresponding to one emitter plate.

An electrostatic precipitator (1) to precipitate one or more materials (9) out of an exhaust gas flow (5) has a spray electrode (2) having an active part (14) for generating a corona discharge (6) and a flushing liquid supply (21), by means of which flushing liquid (10) is supplied into the precipitator (1) for removing deposits (11), made of the material(s) (9) to be separated, that settle on the spray electrode (2). The precipitator (1) uses less cleaning liquid and the cleaning is carried out more reliably. For this purpose, a flushing device (8) directs the flushing liquid (10) across a head region (12) of the spray electrode (2) onto the active part (14) of the spray electrode (2) as a flushing stream (22).

An electrification apparatus for dust collection includes an electrification module configured to generate ions that are emitted to air. The electrification module comprises: a high voltage tip comprising at least one discharge tip configured to emit the ions in a direction opposite to a flow direction of the air, a conductive plate disposed around the discharge tip and configured to generate an electric potential difference with the discharge tip of the high voltage tip, a lower frame that mounts the conductive plate and the high voltage tip, and an upper frame that is coupled to the lower frame and that covers the conductive plate and the high voltage tip so that the discharge tip is exposed to outward.

According to an example aspect of the present invention, there is provided a device for separating materials in the form of particles and/or drops from a gas flow, especially particles and/or drops the diameter of which varies from one nanometer to a few dozen nanometers, the device comprising an inlet for incoming air to be purified, a collection chamber, an outlet for the purified air, a voltage source with actuators, an fastening column to which ion yield tips have been coupled, the device is configured to direct high tension to the ion yield tips providing ion beams from the ion yield tips to the collection surface, the collection surface conducting electricity is electrically insulated from the outer wall of the collection chamber by an electrical insulation, and the device is configured to direct voltage of opposite sign to the ion yield tips than the voltage directed to the collection surface, wherein ion yield tips are arranged directly on a surface of the fastening column having a length, wherein the ion yield tips protrude from the surface of the fastening column into a cavity of the collection chamber.