173results about "Dielectric heating circuits" patented technology

A removable container (21) for products to be cooked for use in a PEF cooking appliance (P) comprises at least two PEF electrodes (4, 5), between which products to be cooked (G) can be introduced and to which PEF signals pulsed with alternating polarity can be applied, at least one sensor (6, 7) and a sensor circuit (14), comprise an energy supply device (16) without a battery and DC-isolated from the PEF cooking appliance (P), an evaluation circuit (10) connected to the at least one sensor (6, 7) and the energy supply device (16), and a data transmission device (11) connected to the evaluation circuit (10) and the energy supply device (16), said data transmission device being set up to transmit data received from the evaluation circuit (10) to the PEF cooking appliance (P) in a non-electrical manner. A PEF cooking appliance (P) comprises a PEF signal generator (SG) for generating PEF signals polarized in a commutating manner, a receiving space (AR) for the container (21) for products to be cooked and a data transmission device (PS) for receiving data of the data transmission device (11) of the container (21) for products to be cooked. The invention can be applied particularly advantageously to domestic appliances.

A semiconductor or other substrate can include one or more electrodes, located directly or indirectly on the substrate, separated from each other and coupled to the substrate. At the two or more electrodes, non-zero frequency time-varying electrical energy can be received. The time-varying electrical energy can be coupled via the two or more electrodes to trigger a displacement current to activate free carriers confined within the semiconductor substrate to generate frequency-controlled heat in the semiconductor substrate.

A lossy dielectric heat source transducer or other transducer can be formed using a multi-layer substrate, such as can include a power layer (to receive an applied electromagnetic input signal), a polyurethane or other polymeric electromagnetic energy absorption layer, and a coupling layer therebetween. The absorption layer can be doped with carbon or another dopant material to increase electromagnetic energy absorption. The coupling layer can be doped with barium titanate or another dopant material to focus electromagnetic energy passing through the coupling layer toward the absorption layer. Frequency-selective addressing of particular transducers can include using a plurality of planar resonators, which can be configured to resonate at the same or different specified frequencies of the applied electromagnetic input. Such addressing of such frequency-sensitive structures can permit location-specific actuation of one or more transducers.

A hair styling appliance is described having a pair of electrodes, a chamber located between the electrodes for receiving a section of hair, and a drive unit for applying an alternating voltage to the electrodes to heat the hair dielectrically. The electrodes have a fixed spacing.

A dryer is provided. The dryer includes an alternating current (AC) power supply configured to supply an input voltage, a rectifier configured to rectify the supplied input voltage, a power amplifier configured to amplify the rectified input voltage to provide an output voltage, a plurality of electrodes to which the output voltage is applied, a matching circuit, connected between the power amplifier and the plurality of electrodes, configured to correct a waveform of the output voltage provided from the power amplifier, memory storing instructions, and at least one processor, wherein the instructions, when executed by the at least one processor individually or collectively, cause the dryer to obtain a magnitude of the output voltage provided from the power amplifier, and detect a power value corresponding to the rectified input voltage, based on the magnitude of the output voltage provided from the power amplifier being less than or equal to a defined reference voltage.

To provide a control device, a control method, a transport method, a cooking method, and a program, capable of bringing an object into a good state.SOLUTION: A control device (400) according to an embodiment of the present invention comprises: at least one vibration generating part (3, 4); and a controller that controls voltage including at least AC voltage, where the vibration generating part is at least one electrode that can generate an electric field, an electromagnetic field, or an electromagnetic wave. The control device is configured to: (1) apply voltage of a voltage value and a frequency of the AC voltage for a predetermined period of time, depending on at least any one of pH of an aqueous phase in an object and a moisture content of the object; (2) control the electromagnetic field generated from the electrode; and (3) perform at least one of control of interfacial polarization, interfacial tension, or emulsion state between the aqueous phase and an oil phase in the object and control binding of moisture in the object in a bead-like manner.SELECTED DRAWING: Figure 1

A radio frequency (RF) dielectric heating system includes a solid-state RF power generator, a matching network electrically coupled to the RF power generator, and a dielectric heating applicator electrically coupled to the matching network and including electrodes for applying RF power to a dielectric material. A solid-state RF power generator can include a power supply, an RF power amplifier stage electrically coupled to the power supply, and a control system electrically coupled to and configured to control the RF power amplifier stage. The control system can be configured to regulate an output voltage of the RF power generator to provide a constant RF power generator output current to maintain a constant voltage across the applicator electrodes. Examples of RF power generators and methods for RF dielectric heating are also disclosed.

Provided is an aerosol-generating device (120) for dielectrically heating an aerosol-forming substrate (110). The device (120) comprises an oscillation circuit (150) and an electrode arrangement coupled to the oscillation circuit. The electrode arrangement forms a load capacitor for dielectrically heating the aerosol-forming substrate. The electrode arrangement comprises a first electrode interdigitated.

A food material thawing method, apparatus, refrigeration device, medium and computer program is disclosed according to some embodiments of the disclosure. The method is applied to a refrigeration device provided with a radio frequency thawing apparatus. The method includes: acquiring a target food-material information of a to-be-thawed food material by a sensor disposed in a refrigeration device, the target food-material information comprising a food-material type, a food-material mass and initial food-material temperature of the to-be-thawed food material; determining, based on the target food-material information, radio frequency thawing parameters corresponding to the target food-material information; and controlling the radio frequency thawing apparatus to operate under the radio frequency thawing parameters to thaw the to-be-thawed food material.

A biocompatible medical device can be at least partially implantable into a living human or animal subject to provide active treatment of biofilm that can occur use within the subject. The medical device can include a catheter, including an interior conduit capable of permitting fluid flow. A heating device can be located on a portion of the catheter to be located within the subject, the heating device including at least a pair of electrodes having a variable spacing therebetween, the variable spacing specified to allow heat to be generated using a time-varying electromagnetic input signal providing a variable frequency to control a variable location along the electrodes at which heat is generated, such as can provide a virtual matrix of local heat sources.

A powder bed fusion apparatus includes a build platform movable in a build sleeve, the build platform for supporting a bed of metal powder, a powder layer formation device for forming layers of metal powder to form the bed, a scanner for directing an energy beam to selected regions of each layer to consolidate the metal powder and a radio-wave generator arranged to surround the metal powder and generate radio waves to heat the metal powder that forms the bed.

A control circuitry (11) comprises an adjustable capacitor (C1), and a bias source (111) configured to apply a bias voltage (V2) to said adjustable capacitor (C1) to adjust a capacitance value of the adjustable capacitor (C1). Such a control circuitry may for example be part of a sealing device (1) to seal a medical tubing (2), the sealing device (1) comprising a receptacle (100) to receive said medical tubing (2), the receptacle (100) comprising an electrode arrangement for causing a heat action on the tubing (2).

Provided is an aerosol-generating device (120) for dielectrically heating an aerosol-forming substrate (110). The device (120) comprises an oscillation circuit (150) comprising a switching unit configured for inverting operation and a feedback loop connected across the switching unit. The feedback loop comprises two electrical contacts (160, 165) configured to interconnect with an electrode arrangement that forms a load capacitor CL for dielectrically heating the aerosol-forming substrate (110). The feedback loop is configured to perform resonant oscillating operation. The feedback loop comprises a phase-shift component configured to provide a 180° phase shift between an output signal of the switching unit and an input switching signal of the switching unit above a resonant frequency of the oscillation circuit (150).

According to an embodiment of the present invention, an electrode heating device is provided, comprising: a device housing; an electrode heating element accommodated and arranged inside the device housing, comprising a central conductor, an internal conductor arranged on the inner side of the central conductor and forming a gap, and an external conductor arranged on the outer side of the central conductor and forming a gap; a control board accommodated and arranged inside the device housing, for controlling the heating operation of the electrode heating element by supplying power to the electrodes of the electrode heating element.

Provided is a dielectric heating device and a printing system, which provide a technique for adjusting the amount of heating of a heated object based on the dryness of the heated object without using a sensor for measuring the moisture content in the dielectric heating device. The dielectric heating device includes: an electrode unit having a first electrode and a second electrode that oppose a heated object, for heating the heated object; a voltage application unit that applies an alternating-current voltage to the first electrode and the second electrode; a current value detection unit that detects a current value of an alternating-current current flowing through the electrode unit; a phase difference detection unit that detects a phase difference between the alternating-current voltage and the alternating-current current; an impedance detection unit that detects the impedance of the electrode unit based on the current value and the phase difference; and a control unit that controls the output of the alternating-current voltage output to the electrode unit based on the impedance.

The present disclosure relates to an induction heating device and a liquid ejection system. A technique is provided in which a liquid adhering to a medium can be uniformly dried without using a sensor that measures the water content in the induction heating device. The induction heating device includes a first heater that has a first electrode and a second electrode that oppose the medium to which a liquid containing water is adhered, and a first coil that is electrically connected in series to the first electrode, and that heats the liquid to dry it, and a voltage application unit that applies an alternating voltage of a predetermined drive frequency to the first electrode and the second electrode. The first heater is configured such that a difference between a resonance frequency of the first heater and the drive frequency in a case where the water content of the medium is in a first range is smaller than a difference between a resonance frequency of the first heater and the drive frequency in a case where the water content is in a second range that is less than the first range, and the amount of heat in the case where the water content is in the first range is greater than the amount of heat in the case where the water content is in the second range.

To provide a technique in which in a dielectric heating device, the amount of heating of an object to be heated is adjusted according to the degree of dryness of the object to be heated without the use of a sensor for measuring a water content.SOLUTION: A dielectric heating device comprises: an electrode unit that has a first electrode and a second electrode facing an object to be heated and heats the object to be heated; a voltage application unit that applies AC voltage to the first electrode and the second electrode; a current value detection unit that detects the current value of AC current flowing in the electrode unit; a phase difference detection unit that detects the phase difference between the AC voltage and the AC current; an impedance detection unit that detects the impedance of the electrode unit based on the current value and the phase difference; and a control unit that controls the voltage application unit based on the impedance to control output of AC power output to the electrode unit.SELECTED DRAWING: Figure 2

The present invention relates to a portable and handheld aerosol-generating device, and specifically to an aerosol-generating device for dielectrically heating an aerosol-forming substrate, the aerosol-generating device comprising: a power source providing a DC supply voltage;_an oscillation circuit fed by the power source; and a dielectric heating element forming a load capacitor which is arranged for dielectrically heating the substrate, the dielectric heating element supplied by an oscillating voltage from the oscillation circuit. The oscillation frequency is chosen to be more than 100MHz and less than 1.2 GHz, and the DC supply voltage, the oscillation frequency, and an electrode arrangement and capacitive value of the load capacitor are chosen such that an average electric field strength across electrodes of the load capacitor is more than 10 V / mm and less than 200 V / mm.

The disclosed clothes dryer comprises: a cabinet; the roller is rotatably arranged in the cabinet; a plurality of electrodes spaced apart from each other along a circumference of the drum between the cabinet and the drum; an RF power supply unit for applying a voltage to the plurality of electrodes; and a control unit that controls the RF power supply unit to generate an electric field for dielectric heating of the object to be dried accommodated in the drum through the plurality of electrodes.

A high-frequency heating apparatus according to the present disclosure includes a first electrode (11), a second electrode (12), a high-frequency power supply (30), a position adjuster (20), a detector (50), and a controller (60). The second electrode (12) is disposed facing the first electrode. The high-frequency power supply (30) supplies a high-frequency power to the first electrode. The position adjuster (20) adjusts a distance between the first electrode (11) and the second electrode (12). The detector (50) detects a reflected power from the first electrode (11) toward the high-frequency power supply (30). The controller (60) controls the position adjuster (20) based on the reflected power. In this embodiment, a heating target can be heated efficiently.

To provide a measurement device and a measurement method for determining at least one respiration parameter that do not restrict mobility.SOLUTION: An AC electromagnetic field is emitted to a body and is received in an opposite side of the body, a phase of the received AC electromagnetic field is compared with a phase of the emitted AC electromagnetic field, as a function of time, and at least one respiration parameter is determined from a result of the comparison.SELECTED DRAWING: Figure 1

According to an embodiment, an aerosol-generating device includes: a first circuit board on which a power source and a processor are mounted; a second circuit board which is spaced apart from the first circuit board and on which an RF signal generation circuit for generating an RF signal by using power supplied from the power source, and at least one amplifier for amplifying the generated RF signal are mounted; and a radiator which heats an aerosol-generating article by radiating the amplified RF signal in the form of an electromagnetic wave to an insertion space into which the aerosol-generating article is inserted, wherein the processor may be configured to control the RF signal generation circuit and the at least one amplifier.

The present disclosure relates to an inductor assembly, an impedance matching network, and a system including the inductor assembly. An inductor assembly (100) includes: a fixed element (102) having a central core (104) and a support structure (106) coupled to and projecting outwardly from the central core, each of the support structures having an outer edge (108) having a notched profile with a recess (110) extending toward the central core; and a spiral inductor (112) having a plurality of turns located in the recesses of the at least two support structures. The support structures are spaced equidistantly from each other around the central core by air gaps (308). The inductor assembly can be incorporated into an impedance matching network (1100), and one or more impedance matching networks can be incorporated into a defrost system (100). The impedance matching network can be a single-ended network (1100) or a double-ended network (1300).

Device for welding a flexible tube. The invention relates to a device (1) for welding a flexible tube by radio frequency comprising: - a clamping element (2) comprising a welding head formed of a first electrode (3) and a second electrode (4), - a power source configured to supply electrical energy to the device to be welded, and - a welding element comprising a radio frequency generator and a radio frequency energy converter, said first and second electrodes (3, 4), said power source, said radio frequency generator and said energy converter forming between them an electrical circuit having an impedance, said energy converter comprising at least two inductors mounted in series with the first and second electrodes (3, 4).4) of the welding unit and an electrical current flow control element configured to interrupt the flow of said electrical current in one of the inductors so as to maintain a constant impedance of the electrical circuit during welding. Figure for the abbreviation: Fig. 2,

A drying apparatus is provided. The drying apparatus includes a chamber, a first electrode and a second electrode arranged in the chamber, and facing each other and spaced apart from each other, a power supply configured to apply a voltage to the first electrode and the second electrode, memory, comprising one or more storage media, storing instructions, and one or more processors communicatively coupled to the power supply, the first electrode, the second electrode, and the memory, wherein the second electrode includes a first sub-electrode and a second sub-electrode that are arranged adjacent to each other in a direction parallel to the first electrode, and wherein the instructions, when executed by the one or more processors individually or collectively, cause the drying apparatus to control the power supply to apply a first voltage to the first sub-electrode and to apply the first voltage or a second voltage to the second sub-electrode, the second voltage having a different phase from the first voltage.

A drying apparatus includes: a chamber; a first electrode and a second electrode arranged in the chamber, and facing each other and spaced apart from each other; a power supply configured to apply a voltage to the first electrode and the second electrode; and a controller configured to control the power supply, wherein the second electrode includes a first sub-electrode and a second sub-electrode that are arranged adjacent to each other in a direction parallel to the first electrode, and the controller is configured to control the power supply to apply a first voltage to the first sub-electrode and to apply the first voltage or a second voltage to the second sub-electrode, the second voltage having a different phase from the first voltage.

According to embodiments, an electronic device may comprise: a load circuit including a plurality of electrodes; a converter configured to convert the magnitude of direct current power; at least one driving circuit configured to output alternating current power to the load circuit by using the direct current power provided from the converter; a temperature sensor for measuring the temperature of an object arranged between the plurality of electrodes; and a controller. The controller may be configured to identify the object arranged between the plurality of electrodes. The controller may be configured to control the converter and / or the at least one driving circuit such that first power of a first frequency is output to the load circuit from a time point when the temperature of the object exceeds a first reference value. The controller may be configured to control the converter and / or the at least one driving circuit such that the magnitude of the first power output to the load circuit increases, on the basis of checking that the temperature of the object increases from less than the first reference value to the first reference value while the first power is output.

A dielectric heating device is provided. The dielectric heating device includes at least one power source, a load circuit including a plurality of electrodes and at least one inductor, and at least one driving circuit configured to output alternating-current power to the load circuit by using power provided from the at least one power source, wherein the plurality of electrodes include a plurality of top electrodes arranged in substantially the same plane, and one bottom electrode arranged in a plane parallel to the plane formed by the plurality of top electrodes.

The present invention relates to an aerosol-generating device, and specifically to an aerosol-generating device for dielectrically heating an aerosol-forming substrate of an aerosol-forming article. The aerosol-generating device comprising a power source; and an oscillation circuit, the oscillation circuit including: a switching unit; and a resonant oscillating feedback circuit connected between an input and an output of the switching unit, the resonant oscillating feedback circuit including a dielectric heating element which is arranged for dielectrically heating the substrate. In operation, an electrical parameter associated with a capacitance of the dielectric heating element is measured to determine a property of the substrate.