Abstract: The plasma generator has the dielectric having the inner circumferential surface, and a pair of electrodes which are arranged separated from each other in the direction along the inner circumferential surface and are isolated from each other by the dielectric and which are capable of generating plasma on the inner circumferential surface by application of voltage. In the inner circumferential surface, at the positions between the pair of electrodes in a plan view, recessed portions causing electric field concentration are formed.

Abstract: Provided is an ion wind generator capable of suitably generating an ion wind along the surface of a dielectric. An ion wind generator has: a dielectric having a first primary surface and a second primary surface at the rear thereof; an inner side electrode arranged in the dielectric; a first electrode arranged on the first primary surface side with respect to the inner side electrode; and a second electrode arranged on the second primary surface side with respect to the inner side electrode. The inner side electrode has a first downstream area located in a first direction (the positive side of x-axis direction) along the first primary surface with respect to the first electrode, and a second downstream area located in a second direction (the positive side of x-axis direction) along the second primary surface with respect to the second electrode.

Abstract: Provided is an ion wind generator capable of diversifying either or both of the amount of wind or wind direction. An ion wind generator is provided with a first electrode, a second electrode having a downstream area which is arranged at a position in a plan view shifted from first electrode towards the positive side in the x direction, and a dielectric between the first electrode and the second electrode. In a plane view, the distance (d) in the x-direction from a downstream side edge of the first electrode to the downstream side edge of the downstream area differs in the y-direction which is perpendicular to the x-direction.

Abstract: A plasma generator has a dielectric with a through hole and has a first electrode and a second electrode provided in the dielectric. The first electrode surrounds the through hole when viewed in the penetrating direction of the through hole. The second electrode includes a downstream region which is positioned further toward one side of the through hole in the penetrating direction of the through hole than the first electrode. When viewed in the penetrating direction of the through hole, the downstream region surrounds the through hole and is further away toward the outer circumferential side from the inner circumferential surface of the through hole than the first electrode.

Abstract: A plasma generator has a first member 2 containing a dielectric material, and an electrode group composed of a plurality of electrodes and including a first assembly 6 partially including a plurality of electrodes and a second assembly 7 partially including a plurality of electrodes. In accordance with an AC voltage, the first assembly 6 generates a plasma in a first space 23 contacting the first member 2. In accordance with a DC voltage, the second assembly 7 generates an electric field in a second space 24 contacting the first member 2 and communicating with the first space 23. At least one or more electrodes of a portion of the first assembly 6 and at least one or more electrodes of a portion of the second assembly 7 are provided on the surface of or in the inside of the first member 2.

Abstract: The plasma generator has the dielectric having the inner circumferential surface, and a pair of electrodes which are arranged separated from each other in the direction along the inner circumferential surface and are isolated from each other by the dielectric and which are capable of generating plasma on the inner circumferential surface by application of voltage. In the inner circumferential surface, at the positions between the pair of electrodes in a plan view, recessed portions causing electric field concentration are formed.

Abstract: Provided is an ion wind generator capable of diversifying either or both of the amount of wind or wind direction. An ion wind generator is provided with a first electrode, a second electrode having a downstream area which is arranged at a position in a plan view shifted from first electrode towards the positive side in the x direction, and a dielectric between the first electrode and the second electrode. In a plane view, the distance (d) in the x-direction from a downstream side edge of the first electrode to the downstream side edge of the downstream area differs in the y-direction which is perpendicular to the x-direction.

Abstract: Provided is an ion wind generator capable of suitably generating an ion wind along the surface of a dielectric. An ion wind generator has: a dielectric having a first primary surface and a second primary surface at the rear thereof; an inner side electrode arranged in the dielectric; a first electrode arranged on the first primary surface side with respect to the inner side electrode; and a second electrode arranged on the second primary surface side with respect to the inner side electrode. The inner side electrode has a first downstream area located in a first direction (the positive side of x-axis direction) along the first primary surface with respect to the first electrode, and a second downstream area located in a second direction (the positive side of x-axis direction) along the second primary surface with respect to the second electrode.

Abstract: Provided is an ion wind generator which is able to raise the speed of the ion wind. An ion wind generator (3) has: a first electrode (9) and a second electrode (11) which are supplied with voltage and induce an ion wind by electric discharge, and a third electrode (13) which forms an electric field for accelerating the ion wind in a downstream region of the ion wind relative to the first electrode (9) and the second electrode (11).

Abstract: A plasma generator has a first member 2 containing a dielectric material, and an electrode group composed of a plurality of electrodes and including a first assembly 6 partially including a plurality of electrodes and a second assembly 7 partially including a plurality of electrodes. In accordance with an AC voltage, the first assembly 6 generates a plasma in a first space 23 contacting the first member 2. In accordance with a DC voltage, the second assembly 7 generates an electric field in a second space 24 contacting the first member 2 and communicating with the first space 23. At least one or more electrodes of a portion of the first assembly 6 and at least one or more electrodes of a portion of the second assembly 7 are provided on the surface of or in the inside of the first member 2.

Abstract: To provide a vent piece capable of being attached to and detached from a mold easily. A vent piece body 4 and a connection sleeve 5 are connected to each other to form a cylindrical shape. The vent piece body 4 and the connection sleeve 5 are inserted in an insertion hole 3 penetrating the wall surface of a mold 2 to connect the inside of the mold 2 to the outside thereof. One end portion 9 of the vent piece body 4 is beforehand formed into a countersunk head screw shape. A cone-shaped concave portion 10 is beforehand formed around the inside opening of the insertion hole 3 in the mold 2. The countersunk head screw shaped end portion 9 is fitted in the cone-shaped concave portion 10. Thereby, the movement of a vent piece 1 to the other side is restrained. A nut 8 is threadedly mounted in the other end portion 14 of the connection sleeve 5 from the outside of the mold 2. By mounting and demounting the nut 8, the vent piece 1 can be attached to and detached from the mold 2 easily.

Abstract: [Object] To provide a vent piece capable of being attached to and detached from a mold easily. [Solution] A vent piece body 4 and a connection sleeve 5 are connected to each other to form a cylindrical shape. The vent piece body 4 and the connection sleeve 5 are inserted in an insertion hole 3 penetrating the wall surface of a mold 2 to connect the inside of the mold 2 to the outside thereof. One end portion 9 of the vent piece body 4 is beforehand formed into a countersunk head screw shape. A cone-shaped concave portion 10 is beforehand formed around the inside opening of the insertion hole 3 in the mold 2. The countersunk head screw shaped end portion 9 is fitted in the cone-shaped concave portion 10. Thereby, the movement of a vent piece 1 to the other side is restrained. A nut 8 is threadedly mounted in the other end portion 14 of the connection sleeve 5 from the outside of the mold 2. By mounting and demounting the nut 8, the vent piece 1 can be attached to and detached from the mold 2 easily.