A particle charger is provided with: a filter (28) partitioning the inside of a housing (20) into a first space (29) and second space (30); a particle introducer (22) for introducing a particle into the first space; a gas ion supplier (10) for supplying the first space with a gas ion; a potential gradient creator (26, 27, 31) for creating a potential difference within the housing so as to make the gas ion and a charged particle resulting from a contact of the aforementioned particle with the gas ion move toward the second space; an AC voltage supplier (32, 33) for applying AC voltages having a phase difference to the neighboring electrodes (28a, b) included in the filter; a controller (35) for performing a control for applying, to the plurality of electrodes, predetermined voltages so as to allow the charged particle to pass through a gap between the electrodes while trapping the gas ion by the electrodes; and a charged particle extractor (23, 25, 34) for extracting the charged particle admitted to the second space to the outside of the housing. By this configuration, the occurrence frequency of the multi-charging is suppressed.

Systems and methods for improving the performance of dilution refrigeration systems are described. Electrostatic cryogenic cold traps employed in the helium circuit of a dilution refrigerator improve the removal efficiency of contaminants from the helium circuit. An ionization source ionizes at least a portion of a refrigerant that includes helium and number of contaminants. The ionized refrigerant passes through an electrostatic cryogenic cold trap that includes a number of surfaces at one or more temperatures along at least a portion of the fluid passage between the cold trap inlet and the cold trap outlet. A high voltage source coupled to the surfaces to causes a first plurality of surfaces to function as electrodes at a first potential and a second plurality of surfaces to function as electrodes at a second potential. As ionized contaminants release their charge on the electrodes, the contaminants bond to the electrodes.

An electrification apparatus for dust collection includes an electrification module configured to generate an ion that is emitted to air. The electrification module includes: at least one discharge tip configured to emit the ion in a direction opposite to a flow direction of the air, a conductive plate configured to generate a potential difference with the discharge tip, a frame that defines an appearance of the electrification module and that supports the discharge tip and the conductive plate, and a high voltage supplier configured to generate a voltage to supply the voltage to the discharge tip.

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.

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.

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 that surrounds the discharge tip and that is 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, an upper frame that is coupled to a first side of the lower frame and that covers the conductive plate and the high voltage tip, the discharge tip protruding outward through the upper frame, and a ground mesh coupled to a second side of the lower frame.

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.

The present invention relates to apparatus for in real time detecting biological particles and non-biological particles in the atmosphere, the apparatus comprising: an impactor adapted to sort the biological particles and non-biological particles absorbed from the outside by size; a charger adapted to charge the biological particles and non-biological particles sorted by means of the impactor to specific charge (positive or negative charge); a separator adapted to introduce the biological particles and non-biological particles charged by the charger thereinto and to sort the biological particles and non-biological particles charged to different charge quantities from each other; and a particle measurement sensor adapted to measure the concentrations of the particles discharged from an outlet.

An image forming apparatus includes a flow passage associated with a direction of flow and a particle collecting device including a filter to collect particles in a fluid passing through the flow passage in the direction of flow. The flow passage includes a curved portion, and a distribution in particle collecting performance of the filter in a direction perpendicular to the direction of flow results from the curved portion of the flow passage.

The present invention relates to an electrification apparatus for electric dust collection and an air conditioner for a vehicle including the sane. According to the teachings of the present invention, there is provided an electrification apparatus for electric dust collection including: a frame which forms an outer appearance; conductive microfibers which are installed in the frame and generates ions in the air; and conductive plates which are installed in the frame and generate a potential difference with the conductive microfibers. The conductive plates are disposed so as to surround the conductive microfibers to form an electrification space in which an electric field is generated. At this time, the electrification space is a rectangular columnar shaped space.