JP2023122602A - warming device - Google Patents

Abstract

Kind Code: A1 To provide a compact heating device with excellent energy-saving performance that suppresses the influence on peripheral equipment.
A heating device (10) heats an object (W) to be heated. and an electric motor 40 which is a rotary drive unit for relatively rotating the metal body 30, and the eddy current flowing in the metal body 30 when the magnet 20 and the metal body 30 are relatively rotated by the electric motor 40. It is configured to heat the metal body 30 by using it.
[Selection drawing] Fig. 2

Description

The present invention relates to a warming device.

2. Description of the Related Art Conventionally, a heating device using an electric heating core and an air blower has been adopted in equipment for preheating resin-made or rubber-made parts to be mounted on a vehicle. This heating device is configured to control the electric heating core to a high temperature state and supply hot air to the closed space in which the parts are housed by sending air to the electric heating core with a blower. In this heating device, an electric heating core, which is a high-temperature object, is used to generate hot air with a high temperature of, for example, significantly exceeding 100°C. A problem of deterioration may occur. At this time, since the hot air generated is high temperature, it is necessary to expand the sealed space that houses the parts, which causes problems such as increasing the size of the equipment and requiring a large amount of power to heat the entire sealed space. There's a problem. In addition, when the temperature of the enclosed space decreases as the enclosed space expands, it takes time to heat the enclosed space to an appropriate temperature range. There is a need. Even in the case of heating by using an automatic guided vehicle (AGV) or truck to transport parts individually to each process, a similar problem can occur if a heating device using an electric heating core is adopted.

A heating technique that is effective in solving such problems is disclosed in, for example, Patent Document 1 below. The electromagnetic induction heating device disclosed in Patent Document 1 has a coil that can be energized and a multilayer structure that is a heating element. configured to generate heat. According to this electromagnetic induction heating apparatus, by arranging the multilayer structure close to the part facing the part, it is possible to heat the part by induction heating without accommodating the part in a wide closed space.

JP-A-9-167678

However, it is known that the following problems occur when an induction heating technique using a coil is adopted as in the above electromagnetic induction heating device. In other words, due to the influence of the electromagnetic field generated when a high-frequency current is passed through the coil, when the target part is heated, the surrounding parts other than the target part also heat up, and the electric circuit of the peripheral equipment is shorted. problem can arise. Therefore, in the design of this type of heating device, there is a demand for a technology capable of heating target parts while suppressing the effects on peripheral equipment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small-sized heating apparatus that has excellent energy-saving performance while suppressing the influence on peripheral equipment.

One aspect of the present invention is
A heating device for heating an object to be heated,
a magnet;
a metal body interposed between the object to be heated and the magnet;
a rotary drive unit for relatively rotating the magnet and the metal body;
with
a heating device configured to generate heat in the metal body by utilizing eddy current flowing in the metal body when the magnet and the metal body are relatively rotated by the rotation drive unit;
It is in.

In the heating device of the above aspect, the metal body is interposed between the object to be heated and the magnet, and rotates relative to the magnet by the driving force of the rotary drive section. At this time, when an eddy current flows through the metal body, which is a conductor, the metal body generates heat due to the thermal action (Joule heat) of this eddy current. If the object to be heated is arranged so as to face the metal body in the heat-generating state, the object to be heated can be heated by the heat transmitted by the infrared radiation from the metal body.

Here, since the metal body does not become a high-temperature object like the electric heating core, the entire object to be heated can be heated to an appropriate temperature according to its material. For example, the heat generation temperature of the metal body can be easily adjusted by appropriately changing conditions such as the relative rotational speed of the magnet and the metal body, the distance between the magnet and the metal body, and the material of the metal body. For this reason, it is possible to prevent phenomena such as deformation or deterioration of the object to be heated as in the case where the object to be heated is locally heated using a high-temperature object.

In addition, because of the structure in which the metal body can be heated only by operating the rotary drive part, the energy used for the operation of the heating device can be kept low. In addition, since the structure is simple, the heating device can be made smaller, and the object to be heated can be heated at a position close to the metal body, so there is no need to store the object in a wide closed space for heating. is effective in preventing the increase in size. Furthermore, as in a structure that forms an electromagnetic field by passing a high-frequency current through a coil, a phenomenon occurs in which heat is generated even in members around the object to be heated, and the electric circuit of peripheral equipment is short-circuited. can prevent

As described above, according to the above-described aspect, it is possible to provide a small-sized heating device with excellent energy-saving performance that suppresses the influence on peripheral equipment and the like.

FIG. 4 is a side view showing the configuration of the process shelf according to the first embodiment; 2 is a diagram schematically showing the cross-sectional structure of the heating device of Embodiment 1. FIG. FIG. 2 is a side view of the heating device of Embodiment 1; 2 is an exploded perspective view of the heating device of Embodiment 1. FIG. The figure which looked at the heating apparatus of FIG. 3 from the to-be-heated object side. FIG. 5 is a perspective view of the magnet in FIG. 4; FIG. 7 is a view of the magnet of FIG. 6 viewed from the outside in the radial direction and is a view for explaining a magnetic field formed by the magnet; The figure which shows typically the cross-sectional structure of the heating apparatus of Embodiment 2. FIG. FIG. 11 is a diagram for explaining the peripheral structure of a magnet and a metal body in the heating device of Embodiment 3;

Preferred embodiments of the above aspects are described below.

It is preferable that the heating device of the above aspect includes an airflow supply section that supplies an airflow directed from the metal body to the object to be heated.

According to this heating device, the gas heated by coming into contact with the metal body can be flowed toward the object to be heated using the generated airflow supplied by the airflow supply unit. As a result, the heat generated in the metal body can be efficiently transferred to the object to be heated to heat it.

In the warming device of the above-described aspect, the rotation drive section is connected to the magnet, and the airflow supply section includes a blower fan that is integrally rotated with the magnet by the rotation drive section, and a blower from the blower fan. and an air flow guide portion forming an air passage extending toward the metal body.

According to this heating device, since the magnet and the blower fan rotate together, the amount of heat generated by the metal body increases or decreases according to the increase or decrease in the rotation speed of the magnet, and the air volume increases or decreases according to the increase or decrease in the rotation speed of the blower fan. Increase or decrease can be proportional. As a result, it is possible to easily adjust the heating level of the object to be heated only by controlling the blower fan.

It is preferable that the heating device of the above aspect includes a rectifying section that rectifies and flows an airflow from the metal body toward the object to be heated.

According to this heating device, the airflow heated by the metal body can be rectified by the rectifying section and then flowed toward the object to be heated. It becomes possible to appropriately supply the desired portion of the object to be heated.

In the heating device of the above aspect, the rectifying section has a flat plate portion facing the object to be heated, and the flat plate portion is provided with a rectifying hole through which the airflow supplied by the airflow supply unit can pass. It is preferable that

According to this heating device, the structure of the rectifying section can be simplified by rectifying the airflow heated by the metal body using the rectifying holes provided in the flat plate portion.

In the heating device of the aspect described above, it is preferable that the straightening section is formed of a part of the metal body.

According to this heating device, the metal body serving as the heating element also has an air flow rectifying function, so that the number of parts can be reduced compared to the case of using a dedicated rectifying section.

In the warming device of the above aspect, it is preferable that the magnet is a permanent magnet having a Halbach array that enhances the magnetic field strength toward the metal body.

According to this heating device, the permanent magnet having the Halbach array increases the strength of the magnetic field directed toward the metal body, so that heat generation of the metal body can be accelerated compared to when the Halbach array is not used. It is possible to increase the heat generation efficiency of

A specific structure of the heating device, which is an embodiment of the above aspect, will be described below with reference to the drawings.

In this specification, the arrow X indicates the first direction, which is the axial direction of the heating device, and the arrow Y indicates the second direction, which is the circumferential direction of the heating device, unless otherwise specified.

(Embodiment 1)
As shown in FIG. 1, the process shelf 1 according to the first embodiment is fixed equipment having a plurality of storage units 2 for temporarily storing and storing parts W. As shown in FIG. In this embodiment, as the parts W, for example, three types of parts Wa, Wb, and Wc are illustrated. The part Wa is an object to be heated, which is to be heated, and is stored in the predetermined storage section 2 as it is. The part Wb is an object to be heated which is to be heated, and is stored in a predetermined storage section 2 in a toteable box. The component Wc is a component that is not to be heated, and is stored in the predetermined storage section 2 as it is.

The heating device 10 of Embodiment 1 is for heating the parts Wa and Wb, which are the objects to be heated, and is attached to the respective storage units 2 for the parts Wa and Wb. In contrast, no heating device 10 is attached to the storage 2 for the parts Wc. The number of heating devices 10 is not particularly limited. Preferably, multiple warming devices 10 are installed.

As shown in FIG. 2, the heating device 10 includes a magnet 20, a metal body 30, and an electric motor 40. As shown in FIG.

The magnet 20 is a permanent magnet that always functions as a magnet and does not change its magnetic pole position and magnetic force. The magnet 20 has a thickness direction in the first direction X, and is arranged with a gap S in the first direction X with respect to the metal body 30 .

The metal body 30 is provided between the object to be heated W and the magnet 20 in the first direction X. As shown in FIG. The metal body 30 is configured as a flat plate member having the first direction X as the plate thickness direction. Although the material of the metal body 30 is not particularly limited, metal materials including iron, copper, nickel, aluminum, etc. can be used as an example.

Note that the shape of the metal body 30 is not particularly limited. The shape of the metal body 30 when viewed from the first direction X may be, for example, a square as shown in FIG. 4, or may be circular, elliptical, polygonal, or the like.

As shown in FIGS. 2 to 4, the electric motor 40 is a rotary drive unit that has the function of relatively rotating the magnet 20 and the metal body 30 . In this embodiment, the electric motor 40 is configured to house a stator 42 as a stator and a rotor 43 as a rotor in a motor case 41 . Although not shown, the electric motor 40 has its operating conditions such as rotational speed controlled by a control device electrically connected to the electric motor 40 .

A motor shaft 44 of the electric motor 40 that rotates integrally with the rotor 43 is connected to the rotor 11 via a coupling 45 for connection. The rotating body 11 is configured as an assembly in which the blower fan 12 and the magnet 20 are integrated in advance. Therefore, the electric motor 40 is connected to the blower fan 12 and the magnet 20 so as to be integrally rotatable around the motor shaft 44 .

The blower fan 12 is a blower with a known structure that rotates integrally with the magnet 20 by the electric motor 40 . The blower fan 12 has a disk shape with the second direction Y as the circumferential direction, and has a plurality of fins 12a (see FIG. 4) arranged at regular intervals in the second direction Y on the outer circumference. Therefore, when the blower fan 12 rotates along with the motor shaft 44 of the electric motor 40, the blower fan 12 draws in outside air through the intake passage 14a and sends it out radially outward with the plurality of fins 12a. form an air current.

The heating device 10 includes a body case 13 that accommodates the rotating body 11 and the metal body 30, and a cover 15 that is attached to the body case 13 so as to close the opening thereof. The body case 13 has side walls 14 extending in the second direction Y. As shown in FIG. A metal body 30 is fixed to the side wall 14 of the body case 13 . An intake passage 14a is provided inside the side wall 14. As shown in FIG. The cover 15 has a side wall 16 extending in the second direction Y, and a top wall 17 which is a flat plate portion facing the object W to be heated with the first direction X as the thickness direction.

The side wall 14 of the main body case 13 and the side wall 16 of the cover 15 constitute an airflow guide portion that forms an airflow path 18 extending from the blower fan 12 toward the metal body 30 . The airflow generated by the blower fan 12 is guided to flow through the blower path 18 toward the metal body 30 . Therefore, the side walls 14 and 16, which are the airflow guides, function as an airflow supply unit that supplies an airflow from the metal body 30 toward the object W to be heated in cooperation with the blower fan 12. As shown in FIG. At this time, if the metal body 30 is in a heat-generating state, the airflow flowing through the air passage 18 is warmed by contact with the metal body 30 . On the other hand, the metal body 30 is cooled by contact with the air current flowing through the air duct 18 .

As shown in FIGS. 4 and 5, the top wall 17 of the cover 15 is formed with a plurality of straightening holes 17a through which the airflow sent from the blower fan 12 through the airflow path 18 can pass. The plurality of rectifying holes 17a are arranged substantially evenly over the entire top wall 17. As shown in FIG. Therefore, the gas warmed by the air duct 18 is rectified through the plurality of rectifying holes 17a of the ceiling wall 17 of the cover 15 so as to be blown out over a wide range roughly corresponding to the projected area in the first direction X of the ceiling wall 17. be. At this time, the ceiling wall 17 of the cover 15 is a flat plate portion facing the object W to be heated, and functions as a straightening portion that straightens the airflow from the metal body 30 toward the object W to be heated.

The number and arrangement of the rectifying holes 17a in the ceiling wall 17 can be appropriately changed according to the shape of the object W to be heated. For example, when it is desired to supply an airflow to a dent or gap formed on the surface of the object W to be heated, the number and arrangement of the rectifying holes 17a can be set so that the airflow is rectified toward the dent or gap. .

Also, as shown in FIG. 4, the cover 15 can be replaced with a cover 15' having another structure, if necessary. The cover 15 ′ has only one straightening hole 17 b formed through the central portion of the top wall 17 . The rectifying hole 17 b is configured so that its inner diameter exceeds the inner diameter of the rectifying hole 17 a of the cover 15 . Therefore, the cover 15' can rectify the gas warmed by the air duct 18 so as to concentrate and blow it toward a narrow range corresponding to the projection area of the rectification hole 17a, as compared with the case of using the cover 15.例文帳に追加

As shown in FIG. 6, in this embodiment, the magnet 20 is a permanent magnet having a cylindrical Halbach array (also referred to as a "Halbach array"). The “Halbach array” referred to here is a well-known one, so a detailed description thereof will be omitted. It forms a magnetic circuit that can The magnet 20 has a structure in which a plurality of first cores 21 forming N poles and a plurality of second cores 22 forming S poles are appropriately arranged. As shown in FIG. 7, the magnet 20 is configured such that the N pole and the S pole are aligned with their directions changed by 90 degrees when viewed from the outside in the circumferential direction.

Although the type of permanent magnet used as the magnet 20 is not particularly limited, ferrite, neodymium, samarium-cobalt, and alnico magnets can be appropriately selected and used.

As shown in FIG. 7, when the magnet 20 is rotated by the electric motor 40 (see FIG. 2), the metal body 30 is relatively rotated within the magnetic field of the magnet 20. As shown in FIG. That is, the magnet 20 and the metal body 30 rotate relative to each other by rotating the magnet 20 as the movable side member with respect to the metal body 30 as the fixed side member. At this time, an eddy current flows through the metal body 30, which is a conductor, so as to cancel out the increase in magnetic flux according to the law of electromagnetic induction. This eddy current generates Joule heat, and the metal body 30 itself generates heat.

As described above, the heating device 10 of the present embodiment is configured to heat the metal body 30 by utilizing the flow of eddy current in the metal body 30 . In particular, by using the magnet 20 having the Halbach array to increase the magnetic field strength so that the magnetic field is concentrated in one direction toward the metal body 30 in the first direction X, the metal body 30 can be more concentrated than when the Halbach array is not used. heat generation of the metal body 30, and is effective in increasing the heat generation efficiency of the metal body 30.

On the other hand, when the Halbach array is not used, the magnetic field intensity of the magnet 20 is approximately left-right symmetrical when the first direction X is the left-right direction. At this time, if the rotation speed of the magnet 20 is the same, the magnetic field strength on the side facing the metal body 30 is lower than that in the case of using the Halbach array, so the effect of promoting the heat generation of the metal body 30 is reduced.

According to the first embodiment described above, the following effects are obtained.

In the heating device 10 of Embodiment 1, the metal body 30 is interposed between the object W to be heated and the magnet 20 and rotates relative to the magnet 20 by the driving force of the electric motor 40 . At this time, when an eddy current flows through the metal body 30, which is a conductor, the metal body 30 generates heat due to the thermal action (Joule heat) of this eddy current. If the object W to be heated is arranged to face the metal body 30 in a heat-generating state, the object W to be heated can be heated by the heat transmitted by infrared radiation from the metal body 30 .

Here, since the metal body 30 does not become a high-temperature object like an electric heating core, the entire object to be heated W is heated at an appropriate temperature (for example, a low temperature significantly lower than 100° C.) according to its material. can be warmed. For example, the heat generation temperature of the metal body 30 can be easily adjusted by appropriately changing conditions such as the relative rotational speed of the magnet 20 and the metal body 30, the distance between the magnet 20 and the metal body 30, and the material of the metal body 30. can. For this reason, it is possible to prevent the deformation or deterioration of the object W to be heated from occurring as in the case where the object W to be heated is locally heated using a high-temperature object. .

Moreover, because of the structure in which the metal body 30 can generate heat only by operating the electric motor 40, the energy used to operate the heating device 10 can be kept low. Further, since the structure is simple, the heating device 10 can be made compact, and the object W to be heated can be heated at a position close to the metal body 30, so it is necessary to house the object W to be heated in a wide closed space for heating. It is effective in preventing equipment from becoming large.

Furthermore, as in a structure in which a high-frequency current is passed through a coil to form an electromagnetic field, heat is generated even in members around the object to be heated W, and the electric circuit of peripheral equipment is short-circuited. can be prevented from occurring.

Therefore, according to the first embodiment, it is possible to provide the heating device 10 that is small in size and has excellent energy-saving performance, with less influence on peripheral equipment.

According to the heating device 10 of Embodiment 1, the gas heated by contact with the metal body 30 can be flowed toward the object W to be heated using the airflow generated by the blower fan 12 . As a result, the heat generated in the metal body 30 can be efficiently transferred to the object W to be heated to heat it.

According to the heating device 10 of Embodiment 1, since the magnet 20 and the blower fan 12 rotate integrally, the amount of heat generated by the metal body 30 increases or decreases in accordance with the increase or decrease in the rotation speed of the magnet 20, and the rotation of the blower fan increases or decreases. The increase/decrease in air volume according to the increase/decrease in speed can be made proportional. As a result, it is possible to easily adjust the heating level of the object W to be heated only by controlling the blower fan 12 .

That is, when the amount of heat generated by the metal body 30 increases as the rotational speed of the magnet 20 increases, the amount of air flowing from the fan 12 to the metal body 30 increases as the rotational speed of the fan 12 increases. Therefore, when it is desired to set the heating performance for the object to be heated W to be high, it is possible to cope with this by simply controlling to increase the output of the electric motor.

On the other hand, when the amount of heat generated by the metal body 30 decreases as the rotation speed of the magnet 20 decreases, the amount of air flowing from the blower fan 12 to the metal body 30 decreases as the rotation speed of the blower fan 12 decreases. Therefore, when it is desired to set the heating performance for the object to be heated W to be low, it is possible to cope with this by simply controlling the output of the electric motor to be lowered.

According to the heating device 10 of the first embodiment, the airflow heated by the metal body 30 can be rectified and then flowed toward the object W to be heated, and the air volume necessary for heating the object W to be heated is can be appropriately supplied to a desired portion of the object W to be heated. In particular, if the airflow heated by the metal body 30 is rectified by using the rectification holes 17a provided in the ceiling wall 17 of the cover 15, the structure for rectification can be simplified.

According to the heating device 10 of the first embodiment, the metal body 30 serving as the heating element also has the function of rectifying the airflow, so that the number of parts can be reduced compared to the case of using a dedicated rectifying section. .

Other embodiments related to the first embodiment will be described below with reference to the drawings. In other embodiments, the same reference numerals are assigned to the same elements as those of the first embodiment, and the description of the same elements will be omitted.

(Embodiment 2)
As shown in FIG. 8, the heating device 110 of the second embodiment differs from the heating device 10 of the first embodiment in that it includes a metal body 130 having a different structure from the metal body 30 described above. Other configurations and arrangements are the same as those of the first embodiment.

The metal body 130 is made of the same material as the metal body 30 of the first embodiment, and is a heating element that generates heat as the magnet 20 rotates. This metal body 130 has a hollow structure consisting of an inner wall 131 , an outer wall 132 and a side wall 133 . The inner wall 131 is provided with an inflow opening 131a into which the airflow generated by the blower fan 12 flows.

The inner wall 131 and the side wall 133 work together with the blower fan 12 to function as an airflow supply section that supplies an airflow from the metal body 30 toward the object W to be heated. Therefore, the air current flowing through the air passage 18 toward the metal body 30 flows into the hollow portion 134 through the inlet opening 131 a of the inner wall 131 .

The outer wall 132 is a flat plate portion facing the object W to be heated, and the flat plate portion is provided with a plurality of rectifying holes 132a. Therefore, the airflow in the hollow portion 134 is rectified and supplied to the object W to be heated when passing through the plurality of rectification holes 132a. As described above, in the heating device 110 of the present embodiment, the outer wall 132, which is a part of the metal body 130, constitutes a straightening section for straightening the airflow.

According to the heating device 110 of the second embodiment, the metal body 130 serving as a heating element also serves as an airflow rectifying function, so that the number of parts can be reduced compared to the case of using a dedicated rectifying section. .

In addition, the same effects as those of the first embodiment are obtained.

(Embodiment 3)
As shown in FIG. 9, a heating device 210 of Embodiment 3 has two magnets 220 (a first magnet 220A and a second magnet 220B), and a metal body having a structure different from that of the metal body 30 described above. 230 is provided, which is different from the heating device 10 of the first embodiment. Other configurations and arrangements are the same as those of the first embodiment.

Both the first magnet 220A and the second magnet 220B have a cylindrical shape, and have a concentric structure that is rotatable around a common rotating shaft portion 221 . A first magnet 220A having a diameter smaller than that of the second magnet 220B is arranged inside the second magnet 220B. Although not shown, the two magnets 220 are configured to be rotatable using the driving force of one or more electric motors 40 (see FIG. 4). Both of the two magnets 220 are composed of permanent magnets having a Halbach array, like the magnets 20 of the first embodiment.

A cylindrical metal body 230 is arranged in the space between the first magnet 220A and the second magnet 220B. At this time, a gap Sa is formed between the first magnet 220A and the metal body 230, and a gap Sb is formed between the second magnet 220B and the metal body 230. As shown in FIG. The metal body 230 is made of the same material as the metal body 30 of the first embodiment, and is a heating element that generates heat as the two magnets 220 rotate.

Although the direction of rotation of the two magnets 220 is not particularly limited, it is preferable to rotate the two magnets 220 in opposite directions in order to increase the heat generation efficiency of the metal body 230 . For example, when the first magnet 220A is rotated in the first direction D1, the second magnet 220B can be rotated in the second direction D2 opposite to the first direction D1.

According to the heating device 210 of the third embodiment, by using the structure in which the two magnets 220 are rotated relative to the metal body 230, the heating efficiency of the metal body 230 is improved compared to the heating device 10 of the first embodiment. can be increased.

In addition, the same effects as those of the first embodiment are obtained.

The present invention is not limited to the exemplary embodiments described above, and various applications and modifications are conceivable without departing from the scope of the present invention. For example, it is also possible to implement the following forms that apply the above-described forms.

In the embodiment described above, the electric motor 40 is used to rotate the magnets 20 and 220. However, instead of the electric motor 40 using electricity as a driving source, an air motor using air as a driving source may be employed. good too.

In the embodiment described above, the case of using cylindrical permanent magnets having a Halbach array as the magnets 20 and 220 was illustrated, but instead of this, permanent magnets having an array other than the Halbach array, or magnets having a shape other than a cylindrical shape may be used. It is also possible to use a permanent magnet or the like.

In the above embodiment, the magnets 20 and 220, which are movable members, are rotated with respect to the metal bodies 30, 130, and 230, which are fixed members. A structure in which the metal bodies 30, 130, 230 are rotated, or a structure in which both the magnets 20, 220 and the metal bodies 30, 130, 230 are rotated can also be adopted.

In the above embodiment, the gas warmed by the metal bodies 30, 130, 230 is supplied to the object to be heated W using the airflow generated by the blower fan 12, but instead of this, the blower fan 12 is omitted, the cover 15 is removed from the main body case 13 (see FIG. 4), and the metal bodies 30, 130, 230 are brought close to the object W to be heated, or brought into direct contact with the object W to be heated. Thus, a structure that heats the object W to be heated can also be adopted.

In the above embodiment, the case where the heating devices 10, 110, 210 are attached to the process shelf 1 is exemplified. A temperature device 10, 110, 210 may be attached. As a result, it is possible to use the heating devices 10, 110, and 210 that are compact and have excellent energy-saving performance, and to heat the parts W using the time required for individually transporting them to each process.

10, 110, 210 heating device 12 blower fan (airflow supply unit)
14 Side wall of main body case (airflow supply part)
16 side wall of cover (airflow supply part)
17 Top wall of cover (rectification part, flat plate part)
17a, 17b rectification hole 18 air passage 20, 220, 220A, 220B magnet 30, 130, 230 metal body 40 electric motor (rotation drive unit)
131 inner wall (airflow supply unit)
132 outer wall (rectification part, flat plate part)
132a straightening hole 133 side wall (air flow supply part)
W, Wa, Wb Object to be heated

Claims (7)

A heating device for heating an object to be heated,
a magnet;
a metal body provided between the object to be heated and the magnet;
a rotary drive unit for relatively rotating the magnet and the metal body;
with
A heating device configured to cause the metal body to generate heat by utilizing eddy current flowing in the metal body when the magnet and the metal body are relatively rotated by the rotation drive section. 2. The heating device according to claim 1, further comprising an airflow supply section for supplying an airflow from said metal body toward said object to be heated. The rotation drive unit is connected to the magnet,
3. The airflow supply unit has a blower fan integrally rotated with the magnet by the rotation drive unit, and an airflow guide unit forming an airflow passage extending from the blower fan toward the metal body. The warming device according to . 4. The heating device according to claim 2, further comprising a rectifying section that rectifies and flows an air current from the metal body toward the object to be heated. 5. The rectifying unit according to claim 4, wherein the rectifying unit has a flat plate portion facing the object to be heated, and the flat plate unit is provided with a rectifying hole through which the airflow supplied by the airflow supply unit can pass. warming device. The heating device according to claim 4 or 5, wherein the rectifying section is constituted by part of the metal body. A warming device according to any one of the preceding claims, wherein the magnet is a permanent magnet with a Halbach array that enhances the magnetic field strength towards the metal body.

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