An induction-heating cooker includes an infrared sensor for detecting infrared rays emitted from a cooking container, a scorching detecting portion for outputting, when a temperature of the cooking container increases from a first set temperature and exceeds a second set temperature, scorching detection information based on infrared detection information of the infrared sensor in a heating mode in which a power can be set, and a loading detecting portion for detecting addition of a load such as, for example, a material to be cooked based on a change of the infrared detection information. Even if the scorching detecting portion outputs the scorching detection information before a cooking time measured from the start of a heating operation reaches a first set time, a controller continues the heating operation. If the loading detecting portion detects that the load has been added, the measured cooking time is cleared and measurement thereof is restarted.

Induction heating cooker

An electromagnetic induction heating device includes an inverter for converting a DC voltage to an AC voltage and supplying the converted AC voltage to induction coils (11, 14) to inductively heat a heating-target object. The inverter includes first and second upper/lower arms (3, 4) having at least two switching elements connected in series; a first resonance load circuit (50) connected to an output terminal of an SEPP type inverter having the first upper/lower arm; a second resonance load circuit (70) connected to an output terminal of an SEPP type inverter having the second upper/lower arm; a third resonance load circuit (60) connected between output terminals of a full bridge inverter having the first and second upper/lower arms and having the first and second load circuits; and a switching unit (20) for connecting or disconnecting the third resonance load circuit to or from the inverter.

Electromagnetic induction heating device

An object to be heated by an induction heating device is prevented from being displaced or lifted from the mounting face by a repulsive force exerted by the interaction between an electric current flowing through an induction heating coil and an electric current induced in the object. The induction heating device comprises a power supply current detecting circuit for detecting the power current of a high-frequency inverter having an induction heating coil and an inverter circuit, a power current variation detecting circuit for measuring a change with time in magnitude of the power supply current to detect displacement or lift of a cooking pan, and a variation detecting circuit. In accordance with the result of detection by the variation detecting circuit, a control circuit controls the output of the high-frequency inverter. Thus, an inexpensive and safe induction heating device which can prevent the cooking pan from being lifted or moved even if it is not touched by the user when it is started to heat or while it is being heated.

Induction heating device

PROBLEM TO BE SOLVED: To provide an induction heating cooker with high safety, which includes a heating element having heat-transfer properties and generating heat by current flow and which can inform a user so as not to touch a top plate of high temperature. SOLUTION: The induction heating cooker includes: a plate-shape heating element arranged between a top plate and an induction heating coil; a temperature detection part for heating element which detects the temperature of the plate-shape heating element; a temperature detection part for cooker which detects the temperature of a heating cooker; and a display part and a sound information part which are an information means. The display part and the sound information part inform a user when the temperature detected by the temperature detection part for cooker is ≥60°C, and informs the user even when this detection temperature is COPYRIGHT: (C)2009,JPO&INPIT

Induction-heating cooker

A deposition source includes a plurality of crucibles that each contains a deposition material. A heat shield provides at least partial thermal isolation for at least one of the plurality of crucibles. A body is included with a plurality of conductance channels. An input of each of the plurality of conductance channels is coupled to an output of a respective one of the plurality of crucibles. A heater increases a temperature of the plurality of crucibles so that each crucible evaporates the deposition material into the plurality of conductance channels. An input of each of a plurality of nozzles is coupled to an output of one of the plurality of conductance channels. Evaporated deposition materials are transported from the crucibles through the conductance channels to the nozzles where the evaporated deposition material is ejected from the plurality of nozzles to form a deposition flux.

Linear deposition source

PURPOSE: To shorten the length of the induction heating device and to prevent the tripping of a high-frequency power source due to the power source interference by providing a magnetic shielding plate between the plural induction heaters consisting of a solenoid coil and placed on one another. CONSTITUTION: The induction heating device consists of the induction heaters 1a, 1b,... formed by the solenoid coils 3a, 3b,... wound of hollow insulators 7a, 7b,... and vertically arranged. The magnetic shielding plates 2a, 2b,... and 4a, 4b,... are provided at the upper and lower ends of the heaters 1, and supports 9a, 9b,... for supporting the heaters 1 are provided between the plates 2b and 4a, and between the plates 2c and 4b and allowed to pierce the hollow part of the respective heaters 1. A steel sheet 5 is passed through the hollow part of the heating device, and high-frequency currents A 1 , A 2 ,... are supplied to the coils 3 from power sources provided respectively to the heaters 1. Magnetic fields are generated by the currents A to that the steel sheet 5. Although the magnetic fields cross the adjacent coils 3, the crossed magnetic fields are reduced by the shielding plates, and the induced voltage generated in the adjacent coil 3 is controlled. COPYRIGHT: (C)1990,JPO&Japio

PURPOSE:To equalize temperature distribution in a steel plate and improve its quality by providing a magnetic flux density relaxing means to relax magnetic flux concentrated at the edge parts of a steel plate in a solenoid coil. CONSTITUTION:On both of the right and left sides in a solenoid coil 12 are provided a plurality of magnetic flux adjusting rings 13 perpendicularly to the advancing direction of a steel plate 11 at the interval of the coil pitch to be apart from the edge part of the steel plate 11 by several tens of milimeters, for example. These magnetic flux adjusting rings 13 are provided for relaxing magnetic flux concentrated at the edge parts of the steel plate 11 by induced current in the rings, and they are movable along the width of the steel plate 11 by drive mechanisms each consisting of a support 14, a drive piston 15, etc. For a second example, a pair of magnetism shielding plates 16, 16 consisting of copper are disposed up and down on both of the right and left sides in a solenoid coil 12 facing each other to have the edge parts of a steel plate between them. The density of Fe in an alloyed steel plate can thus be uniform, thereby its quality can be improved.

Induction heating device for steel plate

A vacuum evaporation equipment for continuous vacuum evaporation of a metal onto a band or strip of product including at least one vacuum sealing station, provision of ducts that are disposed surrounding the band product and extending from the point of vapor deposition where the band product is subjected to a vacuum evaporation process an a chamber held at a reduced pressure or vacuum state to the extent that substantially no reevaporation of once deposited metal is effectively prevented from occurring. The ducts are adapted to be heated to a temperature substantially higher than the temperature of the steel band product. In addition, there is provided at least one vacuum sealing station with rolls rotatably mounted in the interior of a casing and a complementary sealing bar mounted in a complementary engagement relationship with the rolls having a close gap therebetween. A side panel is mounted self-adjustably in sliding motion in the longitudinal direction along the axes of the rolls on the opposite ends thereof, and heaters are provided to heat the rolls, sealing bar and side panel, respectively.

Vacuum evaporation coating equipment

PURPOSE:To perform two-layered single metallic plating and two-layered alloy plating with high productivity and at a low cost by subjecting the surface of a steel strip to combined plating of a vacuum deposition plating method and an electroplating method. CONSTITUTION:A steel strip 18 is heated in an oxygen free furnace 1 to remove the rolling mill lubricant sticking to the surface thereof in the stage of cold rolling by evaporation and is defatted. The strip is then heated and soaked and at the same time the surface is activated in the 1st and 2nd heating zones 2, 3. Such strip is passed through a quick cooling zone 4 and a controlled cooling zone 5 and is annealed in an overaging zone 6, by which the tensile strength, yield point, elongation, Lankford value and crystal grain size of the steel strip as a blank plate for plating are adjusted. The steel plate is introduced, in succession thereto, into a vacuum sealing device 8 via a nitrogen replacing chamber 7 and seal rolls 7. Vapor 9 of molten Zn 11 is then plated by vapor deposition on one surface of the strip 18 in a vacuum deposition device 10. Zn is likewise plated by vapor deposition on the other surface in a vacuum deposition device 10'. The steel strip is passed through a vacuum sealing device 8' and a nitrogen replacing chamber 7' and is electroplated thereon with Zn in an electrogalvanizing cell 15. The above-mentioned method is also utilizable for an alloy in place of single metal such as Zn.

Method and device for plating

Low-density choked flow through a parallel plate channel with a narrow gap is studied experimentally for a wide range of Reynolds numbers. In the region from continuum flow to slip flow, the choked flow is analyzed by one-dimensional flow approximation based on the integrated boundary layer equations, taking into account the slip at the channel walls. The calculated discharge coefficients and pressure distributions agree well with the experimental results for a wide range of Reynolds numbers, including the slip flow region. A nondimensional correlation equation of the discharge coefficient is proposed as a function of Reh s /l for Reh s /l<2x10 2 . In the region from slip flow to molecular flow, the experimental results agree well with those of previous work. A nondimensional correlation equation of C d l/h s is proposed as a function of Re for 7 < Re < 5 x 10'.

Mitsuo Kato

Papers

Induction heating device

Induction heating device for steel plate

Vacuum evaporation coating equipment

Method and device for plating

Discharge Characteristics of Low-Density Gas Flow through Parallel Plate Channel with Narrow Gap