US Pat. No. 9,474,109

INDUCTION HEATING APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. An induction heating apparatus adapted to induction heating of a conductive plate member with an intermediate-frequency
wave of 50 Hz to 1000 Hz, comprising:
a conveyance passage in which the conductive plate member is conveyed;
a first flat-shaped coil arranged on an upper side of the conveyance passage and provided with a magnetic path orthogonal
to the conveyance passage in a center portion thereof;

a second flat-shaped coil arranged on a lower side of the conveyance passage and provided with a magnetic path orthogonal
to the conveyance passage in a center portion thereof;

a first circumferential magnetic path member arranged around the first flat-shaped coil and forming a circumferential magnetic
path for guiding a magnetic flux generated by the first flat-shaped coil to a lateral outside of the conveyance passage; and

a second circumferential magnetic path member arranged around the second flat-shaped coil and forming a circumferential magnetic
path for guiding a magnetic flux generated by the second flat-shaped coil to the lateral outside of the conveyance passage
and connected to the first circumferential magnetic path member, wherein

the magnetic fluxes generated by the first and second flat-shaped coils are configured to pass through both right and left
end portions of the conductive plate member conveyed to the conveyance passage by the first and second circumferential magnetic
path members; and

the first flat-shaped coil and second flat-shaped coil are divided into a plurality of flat-shaped division coils that are
arranged so as to be laterally shifted,

wherein the first flat-shaped coil and second flat-shaped coil are divided into two flat-shaped division coils having the
same configuration and the same shape that are arranged so that a center axis of one of the two flat-shaped division coils
is set to a position where a winding diameter of a wound coil of the other flat-shaped division coil is divided into two.

US Pat. No. 9,277,599

SPINNING PACK HEATING DEVICE AND MELT SPINNING APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. A spinning pack heating device that preheats a spinning pack by induction heating, the spinning pack heating device comprising:
a magnetic path forming member that forms a magnetic path with a spinning pack arrangement space where the spinning pack is
arranged intervening between respective ends of the magnetic path forming member that border the space; and

a magnetic flux generating winding that is provided so as to be wound to surround the spinning pack arrangement space, wherein:
the magnetic path forming member includes a pair of magnetic path yoke cores that form three spinning pack arrangement spaces
arranged at respective vertices of an equilateral triangle;

the magnetic flux generating winding is one of three magnetic flux generating windings, a respective one of the three magnetic
flux generating windings being provided for each of the three spinning pack arrangement spaces; and

the three magnetic flux generating windings are connected to a three-phase AC power source.

US Pat. No. 9,622,297

METALLIC BODY INDUCTION HEATING APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. An annular metallic body induction heating apparatus, comprising:
a plurality of divided core parts formed by dividing an annular core, the annular core being annularly shaped about a core
axis;

a plurality of divided end parts in at least one of the divided core parts, the plurality of divided end parts respectively
attached with annular metallic bodies made of non-magnetic metal to thereby make the annular core penetrate through the plurality
of annular metallic bodies, the annular metallic bodies each being annularly shaped about a respective body axis; and

input windings provided in respective outer circumferential parts or inner circumferential parts of the annular metallic bodies
to inductively heat the annular metallic bodies by application of AC voltage,

wherein the annular metallic bodies are positioned such that each body axis is perpendicular to the core axis.

US Pat. No. 9,709,262

SUPERHEATED STEAM RECYCLING APPARATUS AND METHOD FOR USING SAME

Tokuden Co., Ltd., Kyoto...

1. A superheated steam recycling apparatus comprising:
a superheated steam generating part that generates superheated steam;
a steam supply flow path for supplying saturated steam or superheated steam to the superheated steam generating part;
a superheated steam utilization part that is supplied with the superheated steam generated by the superheated steam generating
part and thermally processes a processing object with the superheated steam;

a steam return flow path for returning used steam having passed through the superheated steam utilization part to the superheated
steam generating part;

a flowmeter that is provided in the steam return flow path to measure a flow rate of the used steam returned to the superheated
steam generating part; and

a control device that controls a flow rate of the saturated steam or the superheated steam to be supplied to the superheated
steam generating part through the steam supply flow path on the basis of a difference between a desired flow rate of the superheated
steam to be generated by the superheated steam generating part and the flow rate of the used steam obtained by the flowmeter.

US Pat. No. 9,854,627

INDUCTION HEATING SYSTEM

TOKUDEN CO., LTD., Kyoto...

1. An induction heating system that uses a three-phase AC power supply to run a single-phase induction heating apparatus including
an induction heating coil, the induction heating system comprising:
an intermediate apparatus that intervenes between the single-phase induction heating apparatus and the three-phase AC power
supply and includes an iron core for forming a closed magnetic circuit that is different from a closed magnetic circuit formed
in the single-phase induction heating apparatus and a coil wound on the iron core and having an even number of turns, the
intermediate apparatus being different from and provided separately from the single-phase induction heating apparatus, wherein:

one of a winding start point and a winding end point of the induction heating coil is electrically connected to one phase
of the three-phase AC power supply, and the other one is electrically connected to a midpoint of the coil of the intermediate
apparatus; and

a winding start point and a winding end point of the coil of the intermediate apparatus are electrically connected to the
remaining two phases of the three-phase AC power supply.

US Pat. No. 10,206,249

FLUID HEATING DEVICE

TOKUDEN CO., LTD., Kyoto...

1. A fluid heating device that applies heat to a fluid that flows in a conductor tube of a helical shape by applying induction heat or electrical heat to the conductor tube, comprising:an electrical connecting member that constitutes a short circuit by electrically connecting each of required portions of the conductor tube, wherein
the electrical connecting member is transformable in accordance with a transformation resulting from a temperature change of the conductor tube,
the electrical connecting member is formed by the use of a metal plate whose middle area is a bent portion, and
the bent portion absorbs the temperature change of the conductor tube.

US Pat. No. 9,849,610

INDUCTION HEATING DEVICE FOR MOLD

TOKUDEN CO., LTD., Kyoto...

1. A mold induction heating device for induction heating a mold that forms a hollow portion therein, comprising:
an upper plate that contacts an upper end face of the mold;
a lower plate that contacts a lower end face of the mold; and
an induction coil that is provided to each plate, and has a voltage applied thereto,
wherein each of the plates has a generally ring-shaped metal plate body in which is formed a recessed housing portion for
housing the induction coil, and a metal cover that closes the recessed housing portion in a state where the induction coil
is housed therein,

a cover placement portion is formed, and
a plurality of jacket chambers, in which a gas-liquid two phase heating medium is enclosed, are formed in the metal plate
body,

wherein in the jacket chambers, a lower surface of a coil adjacent portion that is adjacent to the induction coil has a portion
that is lower than a lower surface of portions other than the coil adjacent portion, and

the coil adjacent portions of the jacket chambers adjacent to each other are in communication with each other by a communication
passage.

US Pat. No. 10,011,775

OIL PURIFYING APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. An oil purifying apparatus for thermally decomposing an organic substance with superheated steam and purifying oil from gas components generated by thermal decomposition, comprising:a heat treatment container for storing the organic substance; and
a superheated steam generating part for generating the superheated steam to be supplied into the heat treatment container, wherein
the superheated steam generating part is provided in the heat treatment container,
the superheated steam generating part comprises: a conductor pipe having an inlet port for introducing water or steam into the superheated steam generating part and an outlet port for deriving the superheated steam; and an electric heating mechanism for electrically heating the conductor pipe and causing the superheated steam to be generated,
the conductor pipe is formed to have a straight pipe shape and a plurality of outlet ports are provided along a flow path direction in an outer surface of the conductor pipe, characterized in that
the electric heating mechanism comprises: a first power supply member connected to one end side of the conductor pipe; a second power supply member connected to another end side of the conductor pipe; and an AC power supply for applying an AC voltage between the first power supply member and the second power supply, wherein
the second power supply member has a covering body covering substantially an entire circumference of an outer circumferential surface from the other end side to the one end side of the conductor pipe, and wherein
an end of the other end side is electrically connected to the conductor pipe.

US Pat. No. 10,194,491

INDUCTION HEAT GENERATION ROLLER DEVICE

TOKUDEN CO., LTD., Kyoto...

1. An induction heat generation roller device, comprising:a roller main body adapted to be rotatably supported;
an induction heat generator provided within the roller main body and having an induction coil for heating the roller main body inductively;
a cooling mechanism configured to introduce a coolant mist at a coolant mist introduction timing into a clearance portion between the roller main body and the induction heat generator for cooling the roller main body;
an AC voltage application part configured to apply an AC voltage to the induction coil, and vaporizes the coolant mist that has condensed; and
a DC voltage application part configured to apply a DC voltage to the induction coil at a DC voltage introduction timing that is in a timed relationship with the coolant mist introduction timing.

US Pat. No. 10,145,744

INDUCTION-HEATED ROLLER APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. An induction-heated roller apparatus comprising:a roll main body that is rotatably supported;
a magnetic flux generating mechanism that is provided inside the roll main body and includes an iron core and a winding wound around the iron core;
a power supply circuit that is connected to the winding of the magnetic flux generating mechanism and provided with a control element configured to control AC current or AC voltage; and
a control device operatively coupled to:
an AC current detector configured to detect AC current flowing through the winding of the magnetic flux generating mechanism to obtain an AC current value,
an AC voltage detector configured to detect AC voltage applied to the winding to obtain an AC voltage value,
a power factor detector configured to detect a power factor of the roll main body and the magnetic flux generating mechanism,
a power supply voltage detector configured to detect power supply voltage of the power supply circuit, and
a power detector configured to detect a power capacity of the roll main body, wherein the control device comprises:
a relational data storage storing relational data indicating a relationship between an impedance of the winding and an inner surface temperature of the roll main body, and
a processor executing an impedance calculation part, a roll temperature calculation part, and an impedance correction part, wherein
the impedance calculation part calculates impedance of the winding from the AC current value obtained by the AC current detector and the AC voltage value obtained by the AC voltage detector;
the roll temperature calculation part calculates the inner surface temperature of the roll main body from the impedance obtained by the impedance calculation part and the relational data stored in the relational data storage;
given that a temperature difference between the inner surface temperature and an outer surface temperature of the roll main body is ?, the roll temperature calculation part corrects the inner surface temperature of the roll main body and calculates the outer surface temperature of the roll main body with use of the temperature difference ? obtained from ?=kP/[2?/{ln(d2/d1)/?}] (where d1 is an inside diameter [m] of the roll main body, d2 is an outside diameter [m] of the roll main body, ? is thermal conductivity [W/m·° C.] of the roll main body at average temperature, P is a thermal flow rate [W/m], and k is a correction factor calculated based on the power factor detected by the power factor detector and the power capacity detected by the power detector); and
the impedance correction part, based on a power supply voltage value obtained by the power supply voltage detector configured to detect power supply voltage of the power supply circuit, corrects the impedance obtained by the impedance calculation part; wherein the roll temperature calculation part calculates the inner surface temperature of the roll main body from corrected impedance and the relational data, without providing the roll main body with a temperature detecting element, the corrected impedance resulting from the correction by the impedance correction part.

US Pat. No. 10,212,764

INDUCTION HEATED ROLL APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. An induction heated roll apparatus comprising: a roll main body that is rotatably supported; a magnetic flux generating mechanism that is provided inside the roll main body and includes an iron core and a winding wound around the iron core; and a power supply circuit that is connected to the winding and provided with a controller that controls AC current or AC voltage, the induction heated roll apparatus lacking a temperature detecting element for measuring a temperature of the roll main body, and the induction heated roll apparatus further comprising:a roll temperature calculation data storage that stores magnetic flux density-excitation resistance relationship data indicating a relationship between magnetic flux density generated by the magnetic flux generating mechanism and an excitation resistance of a magnetic circuit configured to include the iron core and the roll main body;
a processor; and
a memory storing instructions that, when executed by the processor, cause the processor to execute a roll temperature calculator that calculates the temperature of the roll main body with use of, as parameters, an AC current value obtained by an AC current detector that detects the AC current flowing through the winding, an AC voltage value obtained by an AC voltage detector that detects AC voltage applied to the winding, a power factor obtained by a power factor detector that detects the power factor of an induction heated roll including the roll main body and the magnetic flux generating mechanism, a winding resistance value of the winding, and an excitation resistance value obtained from the magnetic flux density-excitation resistance relationship data and a characteristic of the relationship between magnetic flux density generated by the magnetic flux generating mechanism and the excitation resistance of the magnetic circuit configured to include the iron core and the roll main body.

US Pat. No. 9,474,109

INDUCTION HEATING APPARATUS

TOKUDEN CO., LTD., Kyoto...

1. An induction heating apparatus adapted to induction heating of a conductive plate member with an intermediate-frequency
wave of 50 Hz to 1000 Hz, comprising:
a conveyance passage in which the conductive plate member is conveyed;
a first flat-shaped coil arranged on an upper side of the conveyance passage and provided with a magnetic path orthogonal
to the conveyance passage in a center portion thereof;

a second flat-shaped coil arranged on a lower side of the conveyance passage and provided with a magnetic path orthogonal
to the conveyance passage in a center portion thereof;

a first circumferential magnetic path member arranged around the first flat-shaped coil and forming a circumferential magnetic
path for guiding a magnetic flux generated by the first flat-shaped coil to a lateral outside of the conveyance passage; and

a second circumferential magnetic path member arranged around the second flat-shaped coil and forming a circumferential magnetic
path for guiding a magnetic flux generated by the second flat-shaped coil to the lateral outside of the conveyance passage
and connected to the first circumferential magnetic path member, wherein

the magnetic fluxes generated by the first and second flat-shaped coils are configured to pass through both right and left
end portions of the conductive plate member conveyed to the conveyance passage by the first and second circumferential magnetic
path members; and

the first flat-shaped coil and second flat-shaped coil are divided into a plurality of flat-shaped division coils that are
arranged so as to be laterally shifted,

wherein the first flat-shaped coil and second flat-shaped coil are divided into two flat-shaped division coils having the
same configuration and the same shape that are arranged so that a center axis of one of the two flat-shaped division coils
is set to a position where a winding diameter of a wound coil of the other flat-shaped division coil is divided into two.