96results about "Dielectric heating electrodes" patented technology

The invention provides an unfreezing device, a refrigerator and an unfreezing control method of the refrigerator. The unfreezing device comprises a shell, a first electrode board, a second electrode board and a high-frequency power supply, the first electrode board is arranged at the top of the inner wall of the shell, the second electrode board is arranged at the bottom of the inner wall of the shell, the first electrode board and the second electrode board are connected with two ends of the high-frequency power supply respectively, high-frequency alternating electric fields are generated between the first electrode board and the second electrode board when the high-frequency power supply operates, so that high-frequency electromagnetic waves are generated and acted onto unfrozen food, insulating materials are arranged between the first electrode board and the inner wall of the shell and the second electrode board and the inner wall of the shell and on the lower side of the first electrode board and the upper side of the second electrode board, and the unfrozen food is placed on the insulating materials of the upper side of the second electrode board. The unfreezing device is simple in structure, the high-frequency electromagnetic waves are rapidness and uniformity in unfreezing, and nutrient loss is low.

RF energy provided by electrodes positioned between a product is used to heat a product that exhibits a variable impedance during the heating process. As the product's impedance changes during the heating process, RF heating system impedance can be maintained constant by adjusting the distance between the electrodes, adjusting the impedance of a variable impedance device connected between the RF power source and an electrode, or a combination of electrode distance adjustment and impedance adjustment of the variable impedance device. The system is particularly applicable to the heating or pasteurization of bulk food products with multiple heating zones.

A method for repairing an aged or damaged asphalt pavement is provided. The method involves preparing a surface of the aged or damaged asphalt pavement by filling in deviations from a uniform surface plane with dry aggregate and compacting the dry aggregate; applying a reactive asphalt emulsion to the prepared surface; and passing an emitter over the prepared pavement, wherein the emitter generates electromagnetic radiation having a wavelength of from 2-5 mm that penetrates into the pavement to a depth of at least 2 inches. The asphalt pavement is repaired by disturbing voids and interstices in the damaged pavement without dehydrogenation of the asphalt, such that oligomers present in the aged asphalt are linked together into longer polymer chains to improve ductility of the aged asphalt.

The invention provides an apparatus (for heat treating a packaged food product), comprising (a) a channel surrounding a channel interior, (b) a pressurizer, (c) a transport unit, (d) a first electrode, surrounding at least part of the channel interior over a first electrode length, (e) an electrode configuration comprising (i) a second electrode surrounding at least part of the channel interior over a remote part surrounding length (for shielding at least part of the channel), and (f) a radio frequency wave generator configured to generate RF-waves between the first and second electrode. With such apparatus efficiently energy may be coupled into the packaged food product, for instance for heating a meal and / or for pasteurizing a food product. A further advantage of the present apparatus and such process is that it may be configured to be used in a continuous process.

A clothes dryer apparatus (99) comprising an electrically conductive, grounded, generally cylindrical rotatable drum (13) having a hollow interior adapted to contain a load (15) of wet clothes to be dried. The drum's (13) exterior surface (27) is partially indented to form one or more integral, generally ring-shaped insulated notches (10). An electrically conductive, generally flat arcuate anode (11) is positioned within each notch (10), with no physical contact between an anode (11) and its corresponding notch (10). Each anode (11) is spatially fixed with respect to the rotatable drum (13), and is electrically isolated from conductive portions of the drum (13). A source (21) of RF power (12), operating at a single fixed frequency, is coupled to each anode (11).

A resistance welding apparatus includes a welding gun having a first electrode tip serving as a first welding electrode, a second electrode tip serving as a second welding electrode, and a current branching electrode. The current branching electrode has an annular shape and is disposed in surrounding relation to the first electrode tip. The first electrode tip and the current branching electrode abut against a thinnest workpiece disposed on an outermost side of a stacked assembly that is resistance-welded by the resistance welding apparatus, and have opposite polarities to each other. When an electric current is passed from the first electrode tip to the second electrode tip and through the stacked assembly, a branched electric current flows from the first electrode tip to the current branching electrode.

A method for drying an article with a radio frequency (RF) applicator having anode elements and cathode elements includes capacitively coupling the anode elements, capacitively coupling the cathode elements, capactively coupling an anode element to a cathode element, and energizing the RF applicator to generate an RF field between anode and cathode elements wherein liquid residing within the field will be dielectrically heated.

The invention relates to an electrical heating system for at least one section of a fluid transport pipe, the pipe comprising a casing in which the fluid to be transported flows, the heating system comprising electric wires arranged around the casing and intended to be powered, via connection elements, by an electrical power supply comprising several phases, system in which the electric wires are arranged in at least one set of several groups each comprising several electric wires, each of the groups in said set being intended to be supplied by a distinct phase, the electrical heating system comprising connecting units to perform an electrical connection and linking together the electric wires of each of said groups.

A pavement repair system is provided utilizing Solid Phase Auto Regenerative Cohesion (SPARC) Homogenization by Liquid Asphalt Oligopolymerization (HALO) technologies. The SPARC-HALO system is suitable for use in repairing asphalt pavement, including pavement exhibiting a high degree of deterioration (as manifested in the presence of potholes, cracks, ruts, or the like) as well as pavement that has been subject to previous repair and may comprise a substantial amount of dirt and other debris (e.g., chipped road paint or other damaged or disturbed surfacing materials). The HALO system is suitable for rejuvenating aged asphalt, thereby improving properties of the paving material.

An apparatus for heating a hydrocarbon deposit that is susceptible to RF heating by coupling a linear conductive element that extends into the material to a source of RF power. The apparatus includes a source of RF power connected to driving winding that extends around a magnetic core loop and the magnetic core loop extends around the RF conductive linear element. One or more apparatus may be used to couple RF energy to conductive elements that extend into a hydrocarbon deposit to achieve a desired RF current within the element. RF energy may be coupled to conductive elements that are adjacent to each other within a hydrocarbon deposit to create a desired region of heating within the hydrocarbon deposit. The magnetic core loop may start and stop the RF energy to position heating.

An electromagnetic heating applicator is disclosed. The applicator includes a first strand and a second strand, each of which has an insulated portion, a bare portion, and is made up of at least one wire. The first and second strands are braided, twisted, or both braided and twisted together such that the bare portion of each strand is adjacent to the insulated portion of the other strand. A system and method for heating a geological formation are also disclosed. The system includes an applicator in a bore that extends into a formation, an extraction bore connected to a pump and positioned under the first bore, and transmitting equipment connected to the applicator. The method includes the steps of providing the components of the system, connecting the applicator to RF power transmitting equipment, applying RF power to the applicator using the transmitting equipment, and pumping hydrocarbons out of the extraction bore.

A radio frequency (RF) laundry dryer includes, amongst other things, an RF generator, a drying surface and a Faraday cage enclosing the drying surface. The drying surface on which textiles are supported further includes an RF applicator having an anode and cathode coupled to the RF generator. At least a portion of the cathode substantially encompasses the anode to electrically shield the anode from the Faraday cage ensuring the formation of an e-field between the anode and cathode instead of the anode and the Faraday cage upon energizing the RF generator.

The invention relates to a refrigerator, and more specifically relates to a thawing device of a refrigerator. The thawing device of the refrigerator comprises a thawing chamber; the thawing chamber comprises a thawing chamber shell, a thawing chamber liner and a thawing chamber door; an electromagnetic wave excitation module, an electromagnetic wave high-pressure oscillation module and a monitoring module; the monitoring module is used for monitoring food temperatures; the electromagnetic wave excitation module is electrically connected with both of the electromagnetic wave high-pressure oscillation module and the monitoring module; a first electrode and a second electrode are arranged in the thawing chamber, are in contact with food, and are both electrically connected with the electromagnetic wave high-pressure oscillation module; a temperature sensor is further arranged in the thawing chamber and is electrically connected with the monitoring module. The first electrode and the second electrode in the thawing chamber are used for emitting high-frequency electromagnetic waves to food in contact with the two electrodes, and therefore, frozen food can be thawed quickly and evenly.

An RF welder is disclosed that has circuitry that automatically affects system impedance so that, throughout the welding or embossing cycle, a generator is capable of sending energy through die and fabric at a predetermined frequency and cabling is capable of dissipating a load that is less than a preselected amount.

Provided is a high-frequency dielectric heating device for which fine adjustment of inductance is achieved easily and with high precision, while reducing device cost and simplifying device structure.A high-frequency dielectric heating device (10) comprising a high-frequency power source (20), a pair of electrodes (30) disposed facing each other, a reflected power detection means for detecting reflected power occurring due to heating of a substance to be heated, the reflected power detection means being connected between the electrodes (30) and the high-frequency power source (20), and an inductance matching device (40) for adjusting the reflected power, wherein the matching device (40) is provided with a capacitor (C1) connected in parallel to the high-frequency power source (20), and a capacitor (C2) and / or coil (L) with which it is possible to adjust at least reactance, the capacitor (C2) and / or coil (L) being connected in series to the electrodes (30), the high-frequency power source (20) being configured such that frequency can be varied.

A radio frequency (RF) laundry dryer includes, amongst other things, an RF generator, a drying surface and a Faraday cage enclosing the drying surface. The drying surface on which textiles are supported further includes an RF applicator having an anode and cathode coupled to the RF generator. At least a portion of the cathode substantially encompasses the anode to electrically shield the anode from the Faraday cage ensuring the formation of an e-field between the anode and cathode instead of the anode and the Faraday cage upon energizing the RF generator.

An RF laundry dryer includes, amongst other things, an RF generator, an RF applicator having a perforated body supporting anode and cathode elements, a fan arranged relative to the perforated body to flow or draw air through the perforated body and an electromagnetic shield protecting the fan from the e-field. Both anode and cathode elements are operably coupled to the RF generator to generate an e-field between the anode and cathode upon the energizing of the RF generator.

A method for drying an article with a radio frequency (RF) applicator having anode elements and cathode elements includes capacitively coupling the anode elements, capacitively coupling the cathode elements, capactively coupling an anode element to a cathode element, and energizing the RF applicator to generate an RF field between anode and cathode elements wherein liquid residing within the field will be dielectrically heated.

A method and apparatus for controlling the heating of adsorbent materials in a vessel including the utilization of electrodes in direct contact with the adsorbent material to induce a current in the material. The electrical contacts are spaced apart and receive a potential for inducing the electrical current; one of the electrodes is a different size to thereby induce a radial component in the electrical current to thus modify the current density flowing through the adsorbent material as the current traverses the distance between the electrodes. The resulting modified current density causes the temperature gradient across the transverse section of the vessel to decrease, thus rendering the temperature more uniform across the vessel.

A reflector is so provided as to entirely cover a plurality of flash lamps arranged in parallel with one another. The reflector reflects flash light emitted from the flash lamps. A plurality of trigger electrodes needed to allow the flash lamps to discharge are so fixed to the reflector with insulating members interposed therebetween, respectively, as to be proximately opposed to the plurality of flash lamps in a one-to-one correspondence with each other. This eliminates the necessity to provide trigger wires one by one near the flash lamps during the maintenance of the apparatus, the change of lamps or the like, and it is possible to easily provide the trigger electrodes near the flash lamps only by fixing the reflector at a predetermined set position.

There is provided a melting furnace with an agitator. The melting furnace with an agitator includes a melting furnace that contains melt, and an agitator that agitates the melt by an electromagnetic force. The agitator includes a first electrode that is provided at an arbitrary position of the melting furnace so as to come in contact with the melt contained in the melting furnace, a second electrode that is provided near a bottom wall of the melting furnace so as to come in contact with the melt, a first magnetic field device that is provided outside the melting furnace so as to face the bottom wall of the melting furnace and makes a north pole face the bottom wall, and a second magnetic field device that is provided outside the melting furnace so as to face the bottom wall of the melting furnace and makes a south pole face the bottom wall. The first and second magnetic field devices are disposed with a gap in a certain direction.

An RF laundry dryer includes, amongst other things, an RF generator, an RF applicator having a perforated body supporting anode and cathode elements, a fan arranged relative to the perforated body to flow or draw air through the perforated body and an electromagnetic shield protecting the fan from the e-field. Both anode and cathode elements are operably coupled to the RF generator to generate an e-field between the anode and cathode upon the energizing of the RF generator.

A method for drying an article with a radio frequency (RF) applicator having anode elements and cathode elements includes capacitively coupling the anode elements, capacitively coupling the cathode elements, capacitively coupling an anode element to a cathode element, and energizing the RF applicator to generate an RF field between anode and cathode elements wherein liquid residing within the field will be dielectrically heated.

An RF laundry dryer includes, amongst other things, an RF generator, an RF applicator having a perforated body supporting anode and cathode elements, a fan arranged relative to the perforated body to flow or draw air through the perforated body and an electromagnetic shield protecting the fan from the e-field. Both anode and cathode elements are operably coupled to the RF generator to generate an e-field between the anode and cathode upon the energizing of the RF generator.

Industrial apparatus for applying radio-frequency electromagnetic fields to semiconductive dielectric materials comprises a radio-frequency voltage generator and an applicator device for applying radio-frequency electromagnetic fields. The applicator device comprises a plurality of electrodes electrically connected to the electrical generator for generating between then a radio-frequency electromagnetic field with electrical and magnetic components arranged in a preferential direction. The applicator device further comprises at least one pair of equipotential electrodes substantially aligned in the preferential direction and material transportation means for housing and transporting semiconductive dielectric material within the applicator device in a direction substantially parallel to the preferential direction.

The invention relates to an electric heating system for at least one section (1) fluid transportation pipe (2). The pipe includes a sleeve (3) for flowing fluid to-be-transported. The heating system includes a wire (4) supplied by power through connecting elements (21 and 22) and arranged around the sleeve (3). The power includes a plurality of phases. In the heating system, the wire (4) is a set (9) of multiple groups (10a, 10b and 10c), wherein each group includes a plurality of wires (4). Each group in the set can be supplied by different phases. The electric system includes a connection unit (7) for electric connection and connecting each group of wire together.

A hollow tubular body for molten glass by which local-overheating in the electrode for conduction heating is prevented.A hollow tubular body for molten glass by which local-overheating in the electrode for conduction heating is prevented. A hollow tubular body having a platinum or platinum alloy hollow tube, used for conduction heating is characterized in that a ring electrode is joined to the outer circumference of the hollow tube, at least one lead-out electrode is joined to an outer edge of the ring electrode, and the ring electrode comprises a core portion of electrode of platinum or platinum alloy and a thick portion of platinum or platinum alloy or of a metallic material other than platinum or platinum alloy, provided at an outer side of the core portion of electrode.