JP2006236856A - Heating device of metallic can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device for heating a metallic vessel by generating an eddy current by using a permanent magnet. <P>SOLUTION: This heating device 1 is used for heating a heating object 9 comprising a liquid and a vessel including the liquid therein and formed of a conductive material. The heating device 1 is provided with a magnetic field generation means 12 for generating a static magnetic field and rotary drive means 15 and 16 for relatively rotatively moving the magnetic field generation means 12 and the heating object 9; and the heating object 9 is arranged in the static magnetic field. The magnetic flux of the static magnetic field crossing the heating object 9 is changed by the rotative movement to generate the eddy current in the vessel, and the heating object 9 is heated by its thermal loss. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heating device for heating a liquid sealed in a metal container such as aluminum or steel. Specifically, the present invention relates to a heating device for heating a metal can containing a beverage.

  We routinely drink coffee and tea beverages sealed in metal cans such as aluminum and steel. In this method of heating a beverage, when an eddy current is generated in a metal can which is the container, a heat loss of the eddy current occurs and the metal can is heated. Therefore, heat is transferred from the metal can to the beverage in the metal can, and the beverage is heated. A conventional induction heating method for generating an eddy current in a metal can is shown in FIGS.

In FIG. 12, a metal can 200 is disposed in a coil 201, and an alternating current 202 is applied to the coil 201 to generate an alternating magnetic field 203 in the coil 201 (Patent Document 1). In FIG. 13, a metal can 200 is placed on a cradle 205, a search coil 206 is provided on a side surface thereof, and an alternating current (not shown) is applied to the search coil 206 to generate an alternating magnetic field. (Patent Documents 2 and 3). A method is disclosed in which magnetic field lines of an alternating magnetic field intersect with a metal can, and an eddy current is generated in the metal can to heat it.
Japanese Patent Laid-Open No. 03-075992 Japanese Patent Laid-Open No. 10-307956 JP 06-282742 A

  As shown in FIG. 12, when heating is performed by the coil 201, the magnetic lines of force are concentrated on the lid of the metal can 200. As shown in FIG. 13, when heating is performed by the search coil 206, the search coil 206 and the metal can do not change at the fixed position, so that only a part of the metal can is induction-heated. For this purpose, a rotation drive unit for rotating the metal can is provided and heated while rotating the metal can to increase the heating efficiency.

In these induction heating methods, it is necessary to apply a high-frequency alternating current of about several kHz to several MHz to the coil 201 or the search coil 206, and a high-frequency power supply circuit for that purpose is required. Moreover, in order to rotate a metal can, a rotation drive mechanism is required.
The present invention has been made based on the technical background as described above, and achieves the following objects.
An object of the present invention is to provide a heating device for heating a metal container by generating an eddy current using a permanent magnet.

In order to achieve the above object, the present invention employs the following means.
The heating device of the present invention 1 is a heating device for heating an object to be heated, which is a container, by generating an eddy current in the object to be heated.
A magnetic field generating means for generating a static magnetic field;
A gripping means for placing the object to be heated in the static magnetic field and gripping the object to be heated;
The magnetic field generating means and the gripping means are relatively rotated, and the eddy current is generated in the container by changing the magnetic flux of the static magnetic field that intersects the object to be heated by the rotational movement. And a rotation driving means for heating the object to be heated by heat loss.

The heating device of the present invention 2 is the heating device of the first invention,
The magnetic field generating means comprises a plurality of magnets and yokes arranged concentrically,
The plurality of magnets are arranged around the object to be heated so that one magnetic pole is directed to the object to be heated and the magnetic poles of the adjacent magnets are opposite to each other.
The other magnetic pole of the plurality of magnets is fixed to a yoke.

The heating device of the present invention 3 is the heating device of the first invention,
The plurality of magnets are arranged in one or more layers vertically with respect to the rotation axis of the rotation.
The heating device of the present invention 4 is the heating device according to the present invention 1 or the present invention 2,
The rotation driving unit includes a reverse rotation gear mechanism that is a gear mechanism that rotates the magnetic field generation unit and the gripping unit in directions opposite to each other.

  The heating device of the present invention has the following effects. That is, according to the present invention, the liquid contained in the container can be heated by the eddy current generated in the container by rotating the conductive container and the permanent magnet relatively in a magnetic field generated by the permanent magnet. became. As a result, an AC power source for driving the induction coil is not required, and leakage electromagnetic waves generated by the induction coil can be reduced.

  Hereinafter, the heating apparatus according to the embodiment of the present invention is a heating apparatus that heats an object to be heated by causing an eddy current flowing in the object to be heated made of a conductive material to cause a heat loss. This eddy current is generated when the permanent magnet arranged around the object to be heated and the object to be heated are driven to rotate relatively. Hereinafter, the theoretical formula of thermal energy when heating first, the structure of the heating device, and the operation thereof will be described.

[Theoretical formula]
According to the theory of electromagnetism, when the magnetic flux density of a magnetic flux that intersects a metal conductor placed in a magnetic field changes, an eddy current flows through the conductor. When an eddy current flows through the conductor, heat loss occurs due to the specific resistance of the conductor and the conductor is heated. The amount of heat energy when heating is expressed by the following equation.

[First Embodiment]
(Structure of heating device)
FIG. 1 is a perspective view showing the appearance of the heating device according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the heating device. The external appearance of the heating device 1 of the present embodiment has a cylindrical shape, and an object to be heated 9 that is a drinking can to be heated is accommodated therein. An outer frame (machine body) 2 forming an outer shell of the heating device 1 is formed in a hollow cylindrical shape. A lid 3 is disposed on the outer frame 2 so as to cover the opening on the upper end surface. As will be described later, the lid 3 is for housing the article 9 to be heated in the outer frame 2 and fixing the lid from the top of the outer frame 2.

  The lid 3 is fixed to the upper part of the outer frame 2 by two locking means 4 which are fixing members having a known structure. A temperature setting means 5 is disposed below the outer peripheral surface of the cylindrical outer frame 2. This temperature setting means 5 is a setting means for setting the temperature at which the article to be heated 9 (see FIG. 2) is heated. More precisely, in the case of a drinking can, it is a temperature setting means for setting a target temperature when the beverage is heated so as to have an optimum heating temperature. A temperature sensor 26 (see FIG. 5) is disposed in the outer frame 2, and when the set temperature is reached by the output value of this temperature sensor, the power supply of the motor 15 described later is cut off under the control of the controller 16.

  A rotation speed setting means 6 for setting a rotation speed of a magnetic field generating unit 12 (described later) when the object 9 is heated is disposed on the outer frame 2 above the temperature setting means 5. Further, a power switch 7 is disposed on the outer frame 2 at the top of the rotation speed setting means 6. The power switch 7 is a power switch for turning on the heating device 1. A power cord (hereinafter referred to as a cord) 8 is for connecting the heating device 1 to a commercial power source.

  The article 9 to be heated shown in FIG. 2 is an example of a drinking can. The drinking can is stored in a cup-shaped holder 10 having an opening at the bottom. The holder 10 is a means for gripping the drinking can inside. On the outer periphery of the holder 10, a magnetic field generator 12 that is a rotating member is disposed so as to surround the holder 10. The magnetic field generator 12 includes a polygonal yoke (yoke) 13 and a magnet 14. In this example, the polygonal yoke 13 is a hexagonal yoke.

  Permanent magnets 14 are arranged and fixed at every other side. In the case of a drinking can, the article to be heated 9 has a cylindrical shape. The object to be heated 9 is a container made of a conductive material such as aluminum or a steel plate, and a drinking liquid is accommodated therein. In the following description, the object 9 to be heated is described only for the container and the container and the liquid contained in the container. However, various objects stored in the container are known. The present invention is not limited to liquid drinks as in the present embodiment.

  The holder 10 has a cylindrical structure so as to match the outer shape of the container. The holder 10 is fixed to the lid 3 with a thumbscrew 11. On the outer periphery of the holder 10 and the object 9 to be heated, a magnetic field generator 12 that rotates around these is provided. The magnetic field generator 12 includes a polygon yoke 13 and a plurality of magnets 14 arranged on the inner surface of the polygon yoke 13. A cylindrical space for arranging the holder 10 and the object 9 to be heated is arranged at the center. One of the magnetic poles of these magnets 14 is arranged so as to face the object 9 to be heated, and the other magnetic pole of the magnet 14 is fixed to the inner surface of the polygonal yoke 13.

  A rotational drive unit for rotationally driving the magnetic field generator 12 is fixedly installed at the bottom of the outer frame 2. The rotation drive unit includes a motor 15 that is a power source for driving the magnetic field generation unit 12 to rotate, and a controller 16 for controlling the rotation speed of the motor 15, the presence / absence of rotation, and the like. The rotation drive unit is connected to a power source via a power cord 8. The power source is a commercial AC power source or a battery. When the power source is a commercial AC power source, an AC / DC converter (not shown) is required.

  The article 9 to be heated is placed on the thrust bearing 17 and covered with the holder 10 from above. The thrust bearing 17 is for the magnetic field generator 12 to smoothly rotate even when the object to be heated 9 is placed on the thrust bearing 17 when the motor 15 rotates to rotate the magnetic field generator 12. It is. The article 9 to be heated is a can containing a liquid. This can is made of a metal plate material such as aluminum or steel and preferably has a cylindrical shape in the sense of uniform heating, but may also have a polygonal column shape or the like. Examples of the internal liquid include beverage water, coffee, tea, mineral water, and various juices.

  Furthermore, the holder 10 holds the object 9 to be heated and is held and fixed in the rotating magnetic field generator 12 so as not to affect the magnetic field generated from the magnetic field generator 12. It may be of any shape and material. For example, the holder 10 is integrated with the lid 3, and may be a cylindrical one that covers the object to be heated 9. Further, as shown in FIGS. 1 and 2, the object to be heated 9 may be fixed and fixed to the lid 3 with a thumbscrew 11. The material of the holder 10 is preferably a nonmagnetic material such as plastic.

(Structure of magnetic field generator)
FIG. 3 illustrates the structure of the magnetic field generator 12. FIG. 3A is a horizontal sectional view of the magnetic field generator 12. As shown in FIG. 3A, eight magnets 14 are arranged and fixed on the outer periphery of the workpiece 9 so as to be equiangularly spaced and radially (radial) from the center of the workpiece 9. ing. One magnet 14 is arranged so that a magnetic pole opposite to the magnet 14 adjacent to the magnet 14 faces the object 9 to be heated. For example, if one magnet 14 is arranged so that the N pole of the magnetic pole faces the object 9 to be heated, the magnets on both sides thereof are arranged so that the S pole faces the object 9 to be heated.

  FIG. 3B is a vertical sectional view of the magnetic field generator 12. As illustrated in FIG. 3B, the magnet 14 includes a plurality of magnet layers 14-1 and 14-2. Here, only two layers are illustrated, but one layer or three or more layers may be used. When the magnet 14 is manufactured, various configurations are possible depending on the cost and quality. The magnet 14 is made of a permanent magnet such as a neodymium magnet. Since it is a permanent magnet, the magnet 14 always creates a static magnetic field. Among the magnetic poles of the magnet 14, the number of N poles and S poles of the magnetic poles facing the object 9 to be heated is equal.

  Since the magnetic fluxes generated from these magnetic poles facing the object to be heated 9 cancel each other, the magnetic field does not leak from the magnetic field generator 12 to the outside. Magnetic flux generated from the magnetic poles fixed to the polygonal yoke 13 among the magnetic poles of the magnet 14 does not leak out from the polygonal yoke 13. Therefore, the magnetic field from the magnetic field generation unit 12 hardly leaks outside and stays only in the inside.

  This static magnetic flux 18 can be conceptually illustrated as shown in FIG. The magnetic flux generated from the magnetic pole side of the magnet 14 facing the object to be heated 9 enters the adjacent magnet. The magnetic flux density is high near the surface of the magnet 14 and near the periphery of the object 9 to be heated. In the present embodiment, the rotational speed of the motor 15 that rotationally drives the magnetic field generator 12 is approximately 500 to 5000 / rpm per minute. However, the rotational speed of the motor 15 varies depending on the type of magnet, the set temperature, the type of object to be heated, and the like.

  FIG. 5 shows an example of the configuration of the controller 16. The controller 16 includes a central processing unit 21, ROM 22, RAM 23, interface unit 24, display unit 25, temperature sensor 26, motor control unit 27, clock oscillation unit 28, determination unit 29, and the like. The central processing unit 21 is a central processing unit for controlling the entire heating device 1 by operating a control program that is a program for operating the entire controller 16. The ROM 22 is a read-only memory that stores a control program and data necessary for initialization thereof.

  The RAM 23 is a memory for storing data during the operation of the control program. The interface unit 24 is an interface for providing connection with the temperature setting unit 5, the rotation speed setting unit 6, and the power switch 7. It can also be used as an interface for remotely controlling the heating device 1 from an external device. The display means 25 is for indicating the operating state of the controller 16, and an LCD display, LED, or the like can be used.

  The temperature sensor 26 is a sensor for detecting the temperature of the article 9 to be heated. The motor control unit 27 is used to start and stop the rotation of the motor 15 and to control the rotation speed. The clock oscillating means 28 is for oscillating a clock necessary for the central processing unit 21 or for calculating the rotation time of the motor 16. The discriminating means 29 is a sensor for discriminating the size of the article 9 to be heated, the type of the material, and the like.

[Operation]
Hereinafter, the procedure for the user to warm the object 9 containing the liquid will be described with reference to the flowchart of FIG. The user opens the lid 3 of the heating device 1 when heating the article 9 to be heated, and puts the article 9 to be heated therein (step 1). Then, the lid 3 is covered with the opening on the upper surface of the heating device 1 and closed, and locked by the locking means 4. The heated object 9 is held on the holder 10 while turning the thumbscrew 11. (Step 2). The user confirms that the cord 8 is connected to the power source. If not, connect to the power supply (step 3).

  Thereafter, the temperature for heating the article 9 is set by the temperature setting means 5 (step 4). The rotational speed of the motor 15 is set by the rotational speed setting means 6 (step 5). The user presses the power switch 7 to start the heating operation (step 6). The heating device 1 operates and automatically stops until the liquid in the article 9 to be heated is heated to a set temperature. When the heating device 1 stops operating, the user opens the lid 3, takes out the article 9 to be heated from the heating device 1 (step 7), and uses it (step 8).

  The temperature which heats the to-be-heated material 9 changes with the kind of the drink incorporated in the to-be-heated material 9, or the taste of the person who drinks it. The temperature of the article 9 to be heated can be measured by a temperature sensor 26 (see FIG. 5) built in the heating device 1. The rotation speed of the motor 15 can be considered as a speed for heating the article 9 to be heated. The rotation speed of the motor 15 greatly depends on the material of the article 9 to be heated, its size, and the heating temperature. If the rotation speed of the motor 15 is increased, the article 9 to be heated is heated faster. If the rotation speed of the motor 15 is slowed, the opposite is true.

  Thus, when heating the article 9 to be heated, the rotational speed of the motor 15 is an important factor, but the type of the magnet 14 and the strength of the magnetic field generated from the magnet 14 are also important factors. Consider the case of coffee currently in a commercially available aluminum can (350 milliliters). In this case, it is preferable to operate the motor 15 at a rotational speed of 500 to 1200 revolutions per minute. It is also possible to shorten or increase the heating time by making it larger or slower than this value.

  The rotation speed setting means 6, the temperature setting means 5, and the temperature sensor 26 are well-known techniques, and detailed description of their structure and operation is omitted. The rotational speed setting means 6, the temperature setting means 5, and the temperature sensor 26 may have any shape, operation principle, and structure as long as they have the functions described above or described below.

  Next, the procedure for controlling the operation of the heating apparatus 1 by the controller 16 will be described with reference to FIG. FIG. 7 is a flowchart showing the operation procedure of the control program. When the power switch 7 is pressed, the central processing unit 21 calls a control program from the ROM 22 and operates. The control program performs an initialization process with the initial data stored in the ROM 22 (step 11).

  The control program takes in the temperature value Tw set by the temperature setting means 5 (step 12). The control program takes in the value of the rotational speed V of the motor 15 set by the rotational speed setting means 6 (step 13). The control program transmits a command for driving the motor 15 to the motor control unit 27 (step 14). The motor control unit 27 drives the motor 15. The motor 15 rotates to rotate the magnetic field generator 12.

  When the magnetic field generator 12 rotates, the magnetic flux generated from the magnet 14 rotates around the article 9 to be heated, and the magnetic flux that intersects the article 9 to be heated changes. When the density of the magnetic flux intersecting with the article 9 to be heated changes, an eddy current flows through the article 9 to be heated. This eddy current generates heat loss and heats the article 9 to be heated. Heat is transferred from the article to be heated 9 to the liquid contained therein, and the liquid is warmed. This heating becomes an amount of heat obtained by multiplying the amount of heat energy expressed by Equation 1 by a loss coefficient during heat transfer, a loss coefficient due to a heat insulating material, and the like.

  Further, when the motor 15 is being driven, the temperature sensor 26 constantly measures the temperature of the object 9 to be heated. The control program takes in the temperature value Ts measured by the temperature sensor 26 (step 15). The control program controls the heating of the article 9 while comparing the temperature value Ts with the set temperature value Tw (steps 16, 18, and 15). When the temperature value Ts becomes equal to or higher than the set temperature value Tw, a command to stop the motor 15 is transmitted to the motor control unit 27 (steps 16 and 17). The motor control unit 27 stops the motor 15.

  Thus, the magnet 14 is rotated to create an alternating magnetic field, and the magnetic field is crossed with the article 9 to be heated to generate an eddy current. A high-frequency power source for induction current, which has been conventionally required for generating eddy currents, is no longer required, and generation of high-frequency electromagnetic waves generated at this time can be reduced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 8 is a cross-sectional view of the heating apparatus 101 according to the second embodiment. Hereinafter, when the structure of the heating device 101 of the second embodiment is described, the same reference numerals are used for portions having the same function and structure as those of the heating device 1 of the first embodiment. Further, when the same structure and function are described, the contents are omitted, and only different portions are described. The heating device 101 of the second embodiment of the present invention has the same basic heating principle as that of the first embodiment. Although both the object to be heated and the magnetic field generating means are rotationally driven, the difference between the two is that the heating device 101 of the second embodiment is a reverse rotation drive gear mechanism for rotating both in the reverse rotation direction relatively. It is the point which has.

  The heating device 101 includes an outer frame (machine body) 2, a cord 8, a motor 15, and a controller 16 similar to those of the heating device 1 (see FIG. 1). A holder 110 for holding the article 9 to be heated is connected and fixed to the output shaft of the motor 15. When the motor 15 is activated, the holder 110 rotates. On the outer periphery of the holder 110, there are a yoke 113 and a plurality of magnets 114 disposed on the inner surface of the yoke 113. Hereinafter, a combination of the yoke 113 and the plurality of magnets 114 will be described as a magnetic field generator.

  Similar to the heating device 1, these magnets 114 are arranged so that one magnetic pole faces the object 9 to be heated, and the other magnetic pole of the magnet 114 is fixed to the inner surface of the yoke 113. The yoke 113 is fixed to the internal gear 121 via the spacer 120. The material of the spacer 120 is made of a nonmagnetic material. The internal gear 121 is annular and has teeth formed on the inner peripheral surface, and meshes with the gear 122 fixed to the output shaft of the motor 15 via the intermediate gear 123. FIG. 9 schematically shows the relationship of the rotational operations of the internal gear 121, the gear 122, and the intermediate gear 123.

  When the motor 15 rotates, the gear 122 rotates together with it, and the rotation is transmitted to the internal gear 121 through the intermediate gear 123. As shown in FIG. 9, the internal gear 121 and the gear 122 are rotationally driven in opposite directions. After all, the gear 122, the intermediate gear 123, and the internal gear 121 constitute a reverse rotation gear mechanism that rotates the magnetic field generating means and the gripping means that grips the object 9 to be heated in opposite directions. A magnet 114 is integrally fixed to the internal gear 121 via a spacer 120 and a yoke 113. The object to be heated 9 is fixed to the gear 122 via the output shaft and the holder 110. Therefore, the magnet 114 and the article 9 to be heated are rotationally driven in the opposite directions. The fixed disk 125 is fixed to the inner surface of the outer frame 2.

  Fixed to the fixed disc 125 is a lower end of a shaft 124 that rotatably supports the intermediate gear 123 via a bearing (not shown). Further, a thrust bearing 117 is provided on the fixed disk 125, and an internal gear 121 is provided on the thrust bearing 117. The internal gear 121 is placed on the thrust bearing 117 and can rotate smoothly. The lid 103 covers the outer frame 2 and the upper part of the holder 110. A bearing is disposed and fixed on the lid 103, and when the object 9 to be heated is covered with the lid 103, the workpiece 9 comes into contact with the bearing. For this purpose, the lid 103 has a structure that allows the object 9 held by the holder 110 to rotate smoothly when it rotates. The material of the holder 10 is preferably a nonmagnetic material such as plastic.

  The operations of the motor 15 and the controller 16 of the heating device 101 are the same as those of the heating device 1. Both the magnetic field generator and the article 9 to be heated rotate in opposite directions. Therefore, the same effect can be obtained even when the rotation speed of the motor 15 is twice as low as that of the heating device 1. In other words, there is a double effect when rotating at the same rotational speed. Moreover, since the to-be-heated material 9 is rotating, the contents (internal liquid) are vibrated and agitated, and the heat from the metal container is efficiently transmitted.

  FIG. 10 illustrates the structure of the magnetic field generator. Eight magnets 114 are provided at regular intervals around the object 9 to be heated. One magnet 114 is arranged so that a magnetic pole opposite to the magnet 114 adjacent to the magnet 114 faces the object 9 to be heated. Each magnet 114 has a substantially trapezoidal shape. In order to fix each magnet 114 integrally with the cylindrical yoke 113, the outer peripheral surface of each magnet 114 is bonded to the inner peripheral surface of the yoke 113. The space between the magnet 114 and the magnet 114 is a spacer made of a nonmagnetic material. As shown in FIG. 3B, the magnet 114 is composed of a plurality of layers.

[Other Embodiments]
Next, a third embodiment of the present invention will be described. The third embodiment describes the operation procedure of the control program. This operation procedure of the control program can be applied to the first or second embodiment of the present invention. Since the structure of the heating device has been described in detail in the first or second embodiment, it is omitted here.

  The heating device 1 and the heating device 101 described above have a determination unit 29 (see FIG. 5), and determine which kind of material is held in the holder 10. The eddy current is transferred to determine which metal the article 9 to be heated is made of. For example, it is determined whether the container is made of aluminum or steel. Since the technology for discriminating the material of the container is known, a detailed description thereof will be omitted. The control program can read the value from the discriminating means 29 and use it for controlling the rotational speed of the motor 15.

  The procedure for this determination is shown in the flowchart of FIG. When the power switch 7 is pressed, the central processing unit 21 calls a control program from the ROM 22 and operates. The control program performs an initialization process with the initial data stored in the ROM 22 (step 21). The control program takes in the temperature value Tw set by the temperature setting means 5 (step 22). The control program takes in the value of the desired heating time t set by the rotation speed setting means 6 (step 23).

  The control program takes in the discrimination value set by the discrimination means 29 (step 24). The discriminant value is a value set in advance by the material of the container of the article 9 to be heated. The rotational speed of the motor 15 is calculated using the control program using the desired heating time t, the temperature value Tw, and the discriminant value (step 25). The control program calculates the rotation speed and rotation time of the motor for heating the article 9 to a predetermined temperature, for example, 80 degrees Celsius, using the discriminant value indicating the type of container and the temperature value Tw.

  A command for driving the motor 15 is transmitted to the motor control unit 27 (step 26). The motor control unit 27 drives the motor 15. The motor 15 rotates to rotate the magnetic field generator 12. The control program takes in the temperature value Ts measured by the temperature sensor 26 (step 27). Then, the control program controls the heating of the article 9 to be heated while comparing the temperature value Ts with the temperature value Tw (steps 28, 29, 27). When the temperature value Ts becomes equal to or higher than the set temperature value Tw, a command to stop the motor 15 is transmitted to the motor control unit 27 (steps 28 and 30). The motor control unit 27 stops the motor 15.

  The present invention is preferably used in an industry that sells and services heated beverages and the like.

FIG. 1 is a perspective view of the heating apparatus 1 according to the first embodiment of the present invention. FIG. 2 is a sectional view of the heating apparatus 1 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating the structure of the magnetic field generator 12 of the heating device 1. FIG. 4 is a conceptual diagram showing the magnetic flux of the static magnetic field in the magnetic field generator 12 of FIG. FIG. 5 is a diagram illustrating the configuration of the controller 16 of the heating apparatus 1. FIG. 6 is a flowchart showing a procedure for heating the article 9 to be heated. FIG. 7 is a flowchart showing a procedure for controlling the operation of the heating apparatus 1 by the controller 16. FIG. 8 is a cross-sectional view showing an outline of the heating apparatus 101 according to the second embodiment of the present invention. FIG. 9 is a diagram illustrating the rotational drive directions of the gears 121 to 123 in a stylized manner. FIG. 10 is a diagram illustrating the structure of the magnetic field generation unit of the heating apparatus 101. FIG. 11 is a flowchart illustrating a procedure (having a determination unit) for controlling the operation of the heating apparatus according to the third embodiment of the present invention. FIG. 12 is a conceptual diagram showing a conventional induction heating method (coil). FIG. 13 is a conceptual diagram showing a conventional induction heating method (search coil).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 ... Heating device 2 ... Outer frame 3 ... Cover 4 ... Locking means 5 ... Temperature setting means 6 ... Rotation speed setting means 7 ... Power switch 9 ... Object to be heated 10 ... Holder 12 ... Magnetic field generating part 13 Polygonal yoke ( Yoke)
DESCRIPTION OF SYMBOLS 14 ... Magnet 15 ... Motor 16 ... Controller 26 ... Temperature sensor 27 ... Motor control part 28 ... Clock oscillation means 110 ... Holder 113 ... Yoke

Claims (4)

In a heating device for heating an object to be heated, which is a container made of a conductive material containing liquid, by generating an eddy current in the object to be heated,
A magnetic field generating means for generating a static magnetic field;
A gripping means for placing the object to be heated in the static magnetic field and gripping the object to be heated;
The magnetic field generating means and the gripping means are relatively rotated, and the eddy current is generated in the container by changing the magnetic flux of the static magnetic field that intersects the object to be heated by the rotational movement. And a rotation driving means for heating the object to be heated by heat loss. The heating device according to claim 1,
The magnetic field generating means comprises a plurality of magnets and yokes arranged concentrically,
The plurality of magnets are arranged around the object to be heated so that one magnetic pole is directed to the object to be heated and the magnetic poles of the adjacent magnets are opposite to each other.
The other magnetic pole of the said several magnet is being fixed to the yoke. The heating apparatus characterized by the above-mentioned. The heating device according to claim 2, wherein
The plurality of magnets are arranged in one or more layers vertically with respect to the rotation axis of the rotation. The heating apparatus according to claim 1 or 2,
The heating device, wherein the rotation driving unit includes a reverse rotation gear mechanism that is a gear mechanism that rotates the magnetic field generation unit and the gripping unit in opposite directions.

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