Abstract:
An electrostatic fluid delivery system is configured to deliver fluid, such as a disinfectant fluid, onto a surface by electrically charging the fluid and forming the fluid into a mist, fog, plume, or spray that can be directed onto a surface, such as a surface to be cleaned. The system atomizes the fluid using a high-pressure fluid stream and passes the fluid through an electrode of a nozzle assembly to charge droplets of the atomized fluid.
Abstract:
This coating system (2) for coating a workpiece (W1) with a liquid coating product, includes an ultrasonic spray head (14) for generating droplets of coating products, an electrode (32A) for generating an electrostatic field (E) between the electrode and the ultrasonic spray head (14) and a high-voltage generator (52) connected to the electrode for supplying the electrode with high voltage. The shape of the electrode (32A) is advantageously configurable on the basis of the geometry of the workpiece (W1).
Abstract:
Provided is an apparatus for aerosol deposition of nanoparticles on a substrate. The apparatus includes: an aerosol generator for generating an aerosol of micron-sized droplets, each droplet having a limited number of nanoparticles; and a deposition chamber for receiving the aerosol from the aerosol generator. The deposition chamber having an electrostatic field for attracting droplets in the aerosol to the substrate. The electrostatic field being substantially perpendicular to the substrate. The apparatus allows for films/networks of nanoparticles to be patterned on the substrate to sub-millimeter feature sizes, which allows the fabrication of transistor devices for printable electronics applications. Also provided are methods for depositing nanoparticles on a substrate and materials having networks of such nanoparticles.
Abstract:
A current detection resistor is connected between an output terminal of a high voltage generator and an air motor. A coater current detector detects a coater current supplied to a coater based on a potential difference taking place on both terminals of the current detection resistor. The high-voltage control device serves to discriminate based on the coater current detected by the coater current detector whether the coater is caused to be close to a coating object. When it is discriminated that the coater is caused to be close to the coating object, the high-voltage control device outputs a shut-off signal for shutting off supply of the power supply voltage to the power supply voltage control device.
Abstract:
Apparatuses and processes for forming powder are disclosed. The apparatus includes a chamber having a head plate and an array of aerosol and burner nozzles attached to the head plate for generating aerosols and flames respectively. Powder is produced by atomizing a liquid composition to project an aerosol of droplets into the chamber and heating the aerosol with flames projected by the burner nozzles.
Abstract:
A method of detecting a wire break in a high voltage generating device that is configured to detect a wire breakage in a low-voltage cable is disclosed. The method of a wire break includes: detecting whether a wire break has occurred in each of the lines in accordance with a combination pattern of whether the time differential value of an IM signal value of a CW circuit obtained when an operating voltage is boosted is positive, negative, or 0, and whether the time differential value of a VM signal value obtained after the operating voltage is boosted by the CW circuit is positive, negative, or 0; and identifying which of the lines is broken.
Abstract:
Total supplied current (I2) and high voltage (Vm) supplied to a rotary atomizer head (5) are detected by a total current sensor (115) and a high voltage sensor (116). Total leak current (I2) in paint paths, thinner paths and air paths inside an electrostatic atomizer (2) is detected via a metal back plate (40) of the electrostatic atomizer (2). When the total leak current value (I2) exceeds a threshold value (Ia), the level Vm of the high voltage applied to the rotary atomizer head (5) is lowered stepwise.
Abstract:
A high magnitude potential supply comprises a first circuit (220, 224) for generating a first signal related to an output high magnitude potential (KV) across a pair of output terminals (113 and ground) of the supply, a second circuit (210, 218) for generating a second signal related to a desired output current from the high magnitude potential supply, and a third circuit (Q2B, Q2C, Q7 and associated components) for supplying an operating potential (VCT) to the high magnitude potential supply so that it can produce the high magnitude operating potential. The third circuit has a control terminal (COMP terminal of 86). The supply further comprises a fourth circuit (86) coupled to the first (220, 224) and second (210, 218) circuits and to the control terminal (COMP terminal of 86). The fourth circuit (86) receives the first and second signals from the first (220, 224) and second (210, 218) circuits and controls the operating potential supplied to the high magnitude potential supply by the third circuit (Q2B, Q2C, Q7 and associated components). The supply further comprises a fifth circuit (84, 240, 242, 244) for disabling the supply of operating potential to the high magnitude potential supply so that no high magnitude operating potential can be supplied by it. The fifth circuit (84, 240, 242, 244) is also coupled to the control terminal (COMP terminal of 86).
Abstract:
An electrostatic spray module for applying agricultural liquids such as a pesticide to crops where, externally to the spray module the number of connections is reduced to three, one for the liquid pesticide, one for compressed air and one for a low voltage signal. Internally to the spray module, the low voltage is converted to a high voltage signal, which is, along with the pesticide and the compressed air delivered to one or more electrostatic spray nozzles using only two electrically conductive pipes, a gas delivery pipe and a liquid delivery pipe. The nozzles fit into the gas delivery pipe and draw the compressed air through gas channel openings in the side of the nozzles. The gas delivery pipe doubles as the means to delivery the high voltage signal to the nozzles. Each nozzle has a liquid feed from the liquid delivery pipe, which carries ground voltage, maintaining the liquid at ground voltage. The grounded liquid merges with the compressed air in the nozzles to form an atomized liquid. The atomized liquid then passes through an electrode, which is electrically charged by the high voltage signal to form an electrostatic spray. The electrical charge in the spray leads to better dispersal of the spray due to the droplets in the spray repelling from each other, and further improves the adherence of the spray to crops which attract the charged droplets.
Abstract:
A high magnitude potential supply comprises a first circuit for generating a first signal related to a desired output high magnitude potential across a pair of output terminals of the supply, a second circuit for generating a second signal related to an output current from the high magnitude potential supply, and a third circuit for supplying an operating potential to the high magnitude potential supply so that it can produce the high magnitude operating potential. The third circuit has a control terminal. A fourth circuit is coupled to the first and second circuits and to the control terminal. The fourth circuit receives the first and second signals from the first and second circuits and controls the operating potential supplied to the high magnitude potential supply by the third circuit. A fifth circuit is provided for disabling the supply of operating potential to the high magnitude potential supply in certain conditions so that no high magnitude operating potential can be supplied by it. The fifth circuit is also coupled to the control terminal.