961 results about "Induction heater" patented technology

An image forming apparatus includes an image forming mechanism configured to form a toner image on a recording medium according to image data and a fixing mechanism configured to fix the toner image on the recording medium. The fixing mechanism includes an induction heater, a heat generator, and a position adjusting mechanism. The induction heater is configured to generate a magnetic flux. The heat generator is disposed at a position opposite to the induction heater and is configured to generate heat by the magnetic flux generated by the induction heater. The position adjusting mechanism is configured to adjust a position of the induction heater in conjunction with a displacement of the heat generator.

The invention discloses a method and its device for laser to induce the compound melt high performance material coating. The invention heats up and coupling the laser beam and the high frequency electromagnetic induction, and realizes the process of laser compound melt with induction heating. The device includes the laser, the laser conducting device, the laser gathering device, the high frequency induction heater, numerically controlled machine tool, and the workpiece holding device. When the device works, the distance of coating of preparing to deal with workpiece surface and induction heating coil is between 1 and 10 millimeter. The versatility of the invention is strong, so it can do the surface treatment with laser to induce the compound melt high performance material coating in the surface of solid assembly of each material and inner and outer surface of tubular part. The characteristic of melt method lies in utilizing the efficiency high merit of hot spray, cold spray, or supersonic flame spray. And induction heating is done at the time of laser melt. The maximum melt linear speed amounts to 0.5-10 meters per minute, which enhances between one time and ten times to the conventional laser melt. The deposition rate of powder is improved between one time and fifteen times than existing laser melt deposition rate, moreover the melt deposit doesn't have the blowhole and the crack.

A fixing device includes an induction heater constructed of an exciting coil, a first pair of degaussing coils, and a second pair of degaussing coils. A controller turns off the exciting coil while the controller turns on one of the first pair of degaussing coils and the second pair of degaussing coils and at the same time turns off the other one of the first pair of degaussing coils and the second pair of degaussing coils, and then turns on the exciting coil for an extra time period corresponding to reserved power not supplied to the exciting coil while the exciting coil is turned off.

An electronic high frequency induction heater driver, for a variable spray fuel injection system, uses a zero-voltage switching oscillator that is impedance coupled to an imbedded multiple function signal separator and integrated with a conventionally implemented electronic fuel injector driver. The induction heater driver, upon receipt of a turn-on signal, multiplies a supply voltage through a self-oscillating series resonance, and couples the high frequency energy to a high pass filter such that the useful energy is utilized in an appropriate loss component so that fuel inside a fuel component is heated to a desired temperature.

System and method directed to the art of heating a fluid for use in a hydraulic fracturing system. A heat tube having a plurality of pipes disposed axially along and substantially near the periphery of a medial portion of the heat tube. The heat tube is heated by induction heaters.

The utility model relates to a composite art and apparatus for hard alloy and bimetal, wherein the hard alloy is made of C with the content from 1.5 to 3.8 percent, Cr with the content from 15 to 27 percent, high chromium foundry iron with the content Fe used as binder, WC or TIC particles by the powder metallurgy technique, wherein the C and Cr are both accounted for 10-40 percent, the rest is the high chromium foundry iron, the WC or the TIC has the content from 90 to 60 percent. The hard alloy proceed composite casting with the C with the content from 1.5 to 3.8 percent, the Cr with the content from 15 to 25 percent, the rest high chromium foundry iron and spheroidal graphite cast iron in the mould provided with an electro-magnetism induction heater outside. The recombination of two materials is achieved by directly heating to the hard alloy and base metal liquid via the induction heater in the process of casting. The hard alloy produced by the invention has better wetting property and less bulking difference to the base metal, and is capable of achieving good recombination with the base metal. The invention has the advantages of simple recombination technique, easy achievement of technique, good property of the recombination products and low manufacturing costs.

The present invention discloses a technique and relative equipment for casting laminated and composite metal material. Target material is heated to 300 DEG C to 1200 DEG C by an electromagnetic induction heater installed on exterior of a casting die or a water cooling crystallizer. Molten electroslag liquid is poured in the casting die or the water cooling crystallizer, and an electrode is inserted in for heating. The metal liquid is poured in the casting die or the water cooling crystallizer by top casting mode or bottom casting mode. After casting, the induction heater and the electrode conduct continuous heating for 3 to 20 minutes, then heating is stopped, and layered composite material with plane gradient, laminated composite material and coated composite material of all geometric shapes can be produced. The present invention can simplify production procedures of composite material and can realize the dynamic regulation of all technical parameters during composition. The interface of the composite layer is under eay control so as to achieve excelllent metallurgical combination. The present invention has wide optional range about materal of the composite layer, high productivity, simple production technique and low cost.

The invention provides a method and a device used for purifying and ingot-casting of multi-temperature area silicon material; the silicon material is added into a crucible after a fluxing medium is added; the silicon material is inductively heated, fused and vacuum-smelted; furthermore, oxidative gas is added to carry out the reaction; subsequently, temperature reducing and directional solidification are carried out to the silicon material to form silicon ingots by crystallization. The device comprises a crucible system, a lifting device, an induction heater and a resistance heater; the induction heater is arranged on the upper surface of the resistance heater so as to respectively form an induction heating area and a resistance heating area; the lifting device is arranged on the lower surface of the resistance heating area and can move up and down in the induction heating area and the resistance heating area; and the crucible system is arranged on the lifting device. The method and the device can be used for purifying and ingot-casting the silicon ingot with high purity and high purification efficiency, can complete the whole process in one furnace body and can save the time and energy resource.

This invention provides a kind of main-frequency induction heating method using in the frequency treatment system of steel pipe and the tube and drill pipe of oil well. This method include put the work piece to the storage platform, the work piece automatic alignment and localization, the work piece enter the heating roller, quenching inducing heated, closed loop temperature control system, continuum spray ensure the work piece being uniformly quenched entire and quickly, the water stay in the work piece being ejected on the detearing platform, the work piece is heated by the temper inducing heater which controlled by the infrared thermometer controller, descaling device, and then enter the descaling device , the final is the cooling platform. The intermediate-frequency induction heater is using as the heating system, which is safe, no pollution and with little oxide scale. The heater roller ensure the work piece is heated uniformly and entirely, and after this process the work piece no need to be straightened which decrease the cost. The spray quenching equipment ensure the work piece could be uniformly quenched entire and quickly. The descaling device makes the surface of the work piece brightly. The detearing platform makes the work piece move automatically, which won' t influence the heating effect. And the water and steam could not enter the heating inducing loop either, which can increase the life of the loop..

The invention discloses a preparation method of a special composite contact belt, wherein, two or more clean strips with matched properties are heated rapidly in protective atmosphere according to a certain speed by a brushing mechanism and a high frequency induction heater, continuously rolled and compounded according to a certain processing rate under the condition of atmosphere protection such as hydrogen, nitrogen, argon, etc. after a die is precisely located, and formed a long strip with two or more layers. After the long strip carries out heat treatment, the long strip is rolled to the regulated thickness and divided into a plurality of micro sized strips on a precise stripping device. The micro sized strips are prepared into special composite contact strips after being shaped, rolled and molded by a precise die. The preparation method of the invention has the advantages that close combination can be formed and at the same time performance of material is protected by making use of skin effect of the high frequency induction heating; no large rolling equipment is needed; strength of interlayer combination is high and stable; longer strips can be continuously compounded; production efficiency is high by combination of precise stripping technology, thus being suitable for production in large amount.

The invention relates to a quick wear test device of an engine valve seat ring. Evaluation of a wear life of the existing engine valve and seat ring is only completed by an overall reliability bench test at present, the period is long, and the expense is high. The quick wear test device is characterized in that a motor is arranged on a stander, wherein the motor is used for driving a cam shaft, the end of the motor is provided with a photoelectric coder, the top end of a valve rod is contacted with the cam shaft, and the bottom end of the valve rod stretches into the stander and provided with a valve body; and a seat ring which is matched with the valve body is arranged inside the stander, and the valve rod outside the stander is also provided with a valve spring. The bottom inside of the stander is provided with a hydraulic oil cylinder, and the position of the hydraulic oil cylinder is opposite to the valve body. The periphery of the valve seat ring is provided with a sensing heater, and the valve seat ring is also provided with a temperature sensor. The quick wear test device is used for researching a reliability design technology of an engine air distribution mechanism component and has important significance on improving the independence research and development capacity of air distribution mechanism component manufacturers in China and improving the overall design reliability of an engine.

An air conditioner is provided. A compressor compresses refrigerant. An indoor heat exchanger performs heat exchange between the refrigerant and indoor air. An expansion device decompresses the refrigerant. An outdoor heat exchanger performs heat exchange between the refrigerant and outdoor air. Sensors sense temperature of the outdoor heat exchanger, indoor temperature and outdoor temperature. Aheater generates heat variably according to the outdoor temperature and the outdoor heat exchanger temperature. A controller determines quantity of frost on the outdoor heat exchanger by comparing a preset reference temperature with a temperature difference between the outdoor heat exchanger and the outdoor heat exchanger temperature, and controls output of the heater according to the determined frost quantity. Accordingly, frost quantity is determined according to the indoor and outdoor temperatures and the outdoor heat exchanger temperature, and heat quantity of the induction heater is accordingly varied. Therefore, power consumption can be reduced.

Heating devices and methods which are particularly useful in vending machines for hot products. Products such as beverages contained in individual containers such as cans are rapidly heated to serving temperature by induction heating for delivery to a customer. Various types of products with different heating characteristics are rapidly heated without deleterious effects on the product by varying the power and timing of the inductive heating. The type of product is identified by machine-readable indicia on the container which are automatically scanned prior to heating. The product containers are agitated before, during and/or after heating to mix the contents and distribute heat evenly. The containers are heated in a manner to safely heat the product without overheating or causing damage to the container. A power management protocol turns off non-essential components of the vending machine while the inductive heater is energized to permit the vending machine to operate on a standard 120 VAC, 15 A electrical circuit without overload.

The invention discloses a device for efficiently preparing metal spherical ultrafine powder. The device comprises a shell, a crucible and a powder collection area, wherein the crucible is arranged in the shell. The device is characterized in that a thermal couple is arranged inside the crucible; sensing heaters are arranged outside the crucible; the bottom of the crucible is provided with a nozzle with a small hole; a concentrator is arranged below the nozzle; the periphery of the concentrator is provided with sensing coils; the powder collection area comprises a collection disk arranged at the bottom of the shell and a rotary circular disk arranged above the collection disk. The invention further discloses a method for preparing metal spherical ultrafine powder. A technology for preparing fine particles by cutting capillary jet with electromagnetic force and a centrifugal atomizing method are combined, so that metal powder which has the advantages of narrow particle diameter distribution interval, high roundness, high fluidity, superior spreading property, uniform and controllable size and nonexistence of satellite droplets and meets the 3D printing use requirement can be prepared. The method is suitable for industrial production.

An induction heating system including a container for storing a substance; a heating element in thermal contact with the substance; a machine readable tag in thermal contact with the substance, the tag having a machine readable temperature-dependant characteristic; an interrogator for reading the temperature-dependant characteristic of the tag and for determining the current temperature of the substance; an induction heater for generating an AC magnetic field to heat the heating element; and a heater controller for controlling operation of the induction heater, in response to the substance temperature determined by the interrogator, to heat the substance.

An induction heater includes a plurality of heating coils, a plurality of inverters, a plurality of switching circuits, command unit, sensor group, and container detection unit. The number of inverters supplying a high-frequency current to the heating coils is less than the number of heating coils. Each of the switching circuits switches an electric path of each of the heating coils such that each heating coil is connected or not connected to any of the inverters. The command unit controls driving of the inverters and switching of the switching circuits. Each sensor in the sensor group detects a response of a resonance circuit including the heating coil relative to power supply from the inverters. The container detection unit detects whether or not heating target is placed on the heating coil based on an output of the sensor. This enables to retain safety and reduce cost of the induction heater equipped with the plurality of heating coils.

An electric conductor provided for decreasing a lifting force exerted on an object being heated has an aperture of a small diameter in the center thereof, which leaves a large surface area to enhance reduction of the lifting force. The electric conductor is also provided with a comb section around the aperture for preventing a circling current induced in the electric conductor from flowing into an area around the aperture. This structure can thus alleviate excessive heating around the aperture, and allow the heating coil to produce a high output power for a long duration of time even when an inwardly concaved pan is used.