31 results about "Atmospheric pressure discharge" patented technology

Improvements have been made for collecting, focusing, and directing of ions and/or charged particles generated at atmospheric or near atmospheric pressure sources, such as but not limited to, electrospray; atmospheric pressure discharge ionization, chemical ionization, photoionization, and matrix assisted laser desorption ionization; and inductively coupled plasma ionization. A multiple-aperture laminated structure is place at the interface of two pressure regions. Electric fields geometries and strengths across the laminated structure and diameters of the apertures; all of which act to optimize the transfer of the ions from the higher pressure region into the lower pressure region while reducing the gas-load on the lower pressure region. Embodiments of this invention are methods and devices for improving sensitivity of mass spectrometry when coupled to atmospheric, near atmospheric, or higher pressure ionization sources by reducing the gas-load on the vacuum system.

An air pressure discharging non-thermal plasma generator based on pre-ionization ignition device has its characters: the said pre-ionization ignition device, added into the said generator, locates on the third metal pole between two plate poles or inside and outside poles, thus the said plate or coaxial air pressure discharging non-thermal plasma generator is structured. The said pre-ionization ignition device can achieve the direct breakdown of nitrogen, air and oxygen in a lower breakdown voltage, and the stable discharge. The cost of working gas of air pressure discharging non-thermal plasma generator is greatly reduced as well.

The present invention belongs to atmospheric pressure discharge cold plasma generator technology field. It features said generator gas supply system adopting double gas source gas supply system and uncover electrode structure, thereby constituting flat plate type or circle type or elliptic type atmospheric pressure discharge cold plasma generator. Said double gas source gas supply system can realize stabilizing gaseous discharge unable realized in inducing air or other atmospheric pressure, uncover electrode structure capable of avoiding electrode surface dielectric medium damage in current media blocking discharge.

The utility model relates to an atmospheric pressure discharge cold plasma generator, which belongs to the technical field of plasma. The generator comprises an upper partition, a radio frequency electrode, a lower partition and a ground electrode; the radio frequency electrode is connected with the radio frequency power supply, and the ground electrode is connected with the ground wire of the radio frequency power supply; the upper partition covers the radio frequency electrode. It is characterized in that the radio frequency electrode is provided with protruding parallel slats, the ground electrode and the lower partition are provided with narrow grooves matching the slats of the radio frequency electrode, and the parallel slats of the radio frequency electrode can pass through the narrow gap of the lower partition The slots are inserted in parallel between the narrow slots of the ground electrode or through the narrow slots of the ground electrode and then inserted in parallel between the parallel strips of the ground electrode; between the parallel strips of the radio frequency electrode and the narrow slots of the ground electrode or between the narrow slots of the ground electrode A plasma discharge chamber is formed between the grooves and parallel slats; there are vertical and horizontal gas channels inside the lower partition, which can evenly distribute the working gas to each discharge chamber. By applying a voltage, a large volume of uniform plasma is generated under normal pressure. plasma jet.

A high-frequency AC rotating sliding arc discharging plasma generating system for methane dry reforming belongs to the technical field of atmosphere discharging plasma source base and application. Thesystem comprises a gas distributing device, a electric discharging device, an electrical characteristic detecting device, a high-frequency AC power supply and a product analysis device. The electricdischarging device comprises a spiral glass tube, a high-voltage electrode, a low-voltage electrode and a glass cover. The spiral glass tube sleeves the lower part of the high-voltage electrode. The low-voltage electrode sleeves the high-voltage cover and is sealed in the glass cover. The high-voltage electrode is manufactured to the conical electrode. The top angle of the electrode is 30-60 DEG.The low-voltage electrode is manufactured to a cylindrical electrode. The low-voltage electrode is higher than the high-voltage electrode by +/-20mm. The smallest clearance between the high-voltage electrode and the low-voltage electrode is 2mm. The system optimizes the high-voltage electrode top angle and the relative height of the high-voltage electrode and the low-voltage electrode in a rotating slicing arc discharging plasma generating device. Furthermore a gas inlet mode with a spiral glass tube is utilized. A high-frequency AC power supply is used as an exciting power supply. Electrode structure parameters with best reforming effect are obtained.

The invention provides an apparatus and method for improving the hydrophilicity of an aramid fiber by using homogeneous atmospheric-pressure discharge, belonging to the technical field of atmospheric low temperature plasma. The apparatus comprises a bipolar nanosecond pulse power supply (1), a wire-to-plate electrode, an electrical measuring system, a spectral measurement system and an aramid fiber fabric treating device. The bipolar nanosecond pulse power supply (1) drives the wire-to-plate electrode to undergo dielectric barrier discharge; the characteristics of discharge plasma are analyzed by using the electrical measuring system and the spectral measurement system; discharge parameters are changed to obtain uniform discharge plasma; and the apparatus and method are used for treating an aramid fiber fabric (7) and reducing the water contact angle of the aramid fiber fabric (7).

The invention discloses an atmospheric pressure discharging multi-mode conversion apparatus. The atmospheric pressure discharging multi-mode conversion apparatus comprises a high-voltage power supply,a resistor, a cavity body, a high-voltage electrode, a ground electrode and a micrometer caliper, wherein one end of the high-voltage electrode is connected with the output end of the high-voltage power supply through the resistor; the ground electrode is placed in the cavity body; the spacing between the high-voltage electrode and the ground electrode can be adjusted through the micrometer caliper; by adjusting the spacing between the high-voltage electrode and the ground electrode, conversion of multiple discharging modes can be realized between the high-voltage electrode and the ground electrode, such as corona discharge, silk-form discharge, similar glow discharge, glow discharge and spark discharge; and by virtue of the apparatus, the problems of instable and discontinuous discharging mode and incapability of realizing or controlling conversion of multiple discharging modes existing in the current atmospheric pressure discharging mode generation apparatus can be solved.

A surface plasma source at atomspheric discharge includes inpulse power source, sheet electrode with the dielectric covered on it and another electrode isola ted by space, a working air between the dielectric and another electrode. The electrode is a bare net shape electrode to produce the stable and homogeneous surface plasma at the outside face of the bare net shape electrode and the shape of the surface plasma can be changed according to the shape changing of the electrodes.

The invention discloses a mechanical energy self-driven photoelectric detection alarm device. The device mainly comprises a nano-friction generator power supply module, a sample collection module, a plasma discharge module, an optical detection module, a display storage module, an alarm module and an auxiliary module, is driven by a friction nano-generator, has wearable, portable and long-term usefunctions, and is efficient and convenient; an atmospheric pressure discharge system based on the SDBD principle is adopted, and stable and uniform plasma can be generated under low voltage to serveas an emission spectrum excitation source; air is used as working gas, so that the defect of using inert gas is overcome; an emission spectrum method is adopted, and effective detection of low-frequency weak light is achieved through a photomultiplier and an amplifying circuit; sound, light and vibration alarm is adopted, so that effective detection and alarm in a noisy or dark environment can berealized; a modular design is adopted, detection of different kinds of metal gaseous pollutants can be achieved by replacing the detection module, operation is convenient during maintenance and replacement, and the cost is reduced.