A submerged plasma generator includes: a reactor inside of which a flow path, through which a working fluid passes, is formed along a lengthwise direction; and a dielectric insert which is disposed in the flow path so as to define the flow path into one space and the other space, and has formed therein a through-hole to generate micro-nano bubbles by cavitation in the working fluid fed into the one space of the flow path, and includes, a metallic catalyst which undergoes friction with the working fluid flowing through the through-hole and releases electric charges of the same polarity to the micro-nano bubbles to collapse the micro-nano bubbles and generate plasma; in which the other space of the flow path in which the working fluid ionized by exposure to the plasma travels is formed in an oval structure.

A skin microbiota modulation device that includes a cold plasma assembly configured to generate a cold plasma stimulus including a partially ionized gas mixture and to interrogate a biological surface with the cold plasma stimulus; and a microbiota seeding assembly including one or more target species of micobiota, the microbiota seeding assembly configured to deliver the one or more target species of micobiota to the biological surface.

A system for preserving cut-flowers using an atmospheric pressure plasma generator according to an embodiment of the present application includes a container that preserves cut-flowers, an air filter that extracts at least some of moisture contained in air in the container and discharges the same, an air compressor that generates compressed air from the air from which the at least some of the moisture was removed by the air filter, and a plasma generator that generates active species through plasma discharge using the compressed air generated from the air compressor as a plasma discharge gas.

Multiple single plenum and dual plenum showerhead designs are disclosed. In the designs, pillars are disposed in each plenum to increase solidity of the plenums to provide improved axial heat conduction through the showerheads. The heat conduction is further improved by providing solid and substantially conical backplates.

The invention relates to a treatment assembly for treating the surface of a body with a dielectrically limited plasma, comprising an electrode assembly (1), in which at least one electrode (1a, 1b) is arranged in a base section of the electrode assembly (1), which is completely shielded from the surface to be treated by a dielectricum (3), and a connection conductor (6a, 6b) of which extends into a contact projection (5) of the dielectricum (3). The treatment assembly also comprises a contact element (2, 2′), which has a receiving opening (18, 18) for the contact projection (5) and a lever assembly for opening and closing the receiving opening (18, 18′) and for pressing a contact pin (31) through a prefabricated recess (14) of the dielectricum (3) onto the electrode (1a, 1b) in order to deliver a connection of a high-voltage AC source to the electrode (1a, 1b), allows a spatially close arrangement of two contact pins (31), which are connected to at least one high-voltage source, in close proximity to each other in that the electrode assembly (1) has at least two electrodes (1a, 1b), which are arranged in the base section and are insulated from each other by the dielectricum (3) and a connection conductor (6a, 6b) of each of which extends into the contact projection (5); a recess (14) is provided in the dielectricum (3) and a contact pin (31) is provided for each connection conductor (6a, 6b); at least one of the contact pins (31) is supported in the contacting element (2) by means of a dielectric casing (30) and is designed with a non-insulated end face (46) for producing a contact with the corresponding electrode (1a, 1b); and the at least one dielectric casing (30) is oversized with respect to the corresponding recess (14) in the dielectricum (3), said oversize allowing a press fit of the casing (30) in the dielectricum (3) by means of the lever assembly when the non-insulated end face (46) of the contact pin (31) contacts the corresponding electrode (1a, 1b), wherein the press fit prevents an air gap.

It is an object of the present invention to provide a plasma generator capable of efficiently identifying the cause of an abnormal stoppage when an abnormal stoppage of the plasma generator occurs. When the controller determines that at least one detected value has become an abnormal value, the controller terminates plasma generation control. Further, in response to starting plasma generation control, the controller causes the storage section to store a history of detected values in association with time. As a result, it is possible to provide a history of detected values stored in the storage section to efficiently identify the cause of the abnormal stoppage.

Atmospheric-pressure plasma generation device of the present invention includes heat sinks. Flow paths are formed in the heat sinks, and cooling gas flows in the flow paths, thereby cooling lower housing in which a reaction chamber is formed. Here, the gas used for cooling is warmed by the heat of the lower housing. The warmed gas is supplied into heated gas supply device and heated by heater. The heated gas flows in lower cover and is emitted together with plasma gas from lower cover toward a processing object. Consequently, it is possible to perform cooling of the lower housing heated by electric discharge and perform heating of the processing object, and it is possible to reduce energy required for heating gas.

The present invention discloses a plasma aerosol device, comprising a gas tunnel, a dielectric barrier discharge module, and a liquid tunnel. The invention uses a mechanism similar to a dielectric barrier discharge (DBD) electrode system, thus to enable generating a plasma active water mist which riches in free radicals such as reactive nitrogen species (RNS) and reactive oxygen species (ROS). Therefore, this invention is able to be used in medical, sterilization, agriculture and preservation industries.

In a plasma generator having a first supply port and a second supply port, in which the plasma generator includes a first supply device for supplying a first gas from the first supply port, and a second supply device connected to the first supply device so as to supply a second gas from the second supply port, a gas supply determination method includes a first supply step of causing the first supply device to start supplying the first gas in a state where the second supply device stops supplying the second gas, a first measurement step of measuring a flow rate of the gas supplied to the first supply port after the first supply step, and a first notification step of notifying a supply state of the first gas in the first supply port in accordance with a flow rate measurement result of the first measurement step.

A plasma generator capable of detecting whether a connector of a head is electrically connected to a power cable. When the connector of the plasma head is electrically connected to the cable harness, a signal current flows in a path from the controller to the ground via a photocoupler, a relay, a cable, a terminal, another terminal, and a first ground cable in response to a pulse signal outputted from the controller. Accordingly, the plasma generator is able to detect whether the connector of the head is electrically connected to the first power cable and the second power cable, based on whether the photocoupler detects a signal current.