JP7455986B2 - Heating body and electromagnetic heating baking device - Google Patents

Description

[Cross reference to related applications]
This application claims priority to Chinese Patent Application No. 202010118849.4, titled "Heating element and electromagnetic heating baking device", filed on February 26, 2020, the entire disclosure of which is Incorporated into this application by reference.

[Technical field]
The present invention relates to the technical field of electromagnetic heating devices, and in particular to heating bodies and electromagnetic heating baking devices.

Traditionally, heated non-combustible tobacco products typically use electrical resistance heating or electromagnetic heating. The heating structure, whether using electrical resistance heating or electromagnetic heating, generally employs a structure in which a heating blade is inserted into the tobacco stick or a structure in which a heating tube surrounds the tobacco stick. The structure in which the heating blade is inserted is usually such that a tobacco stick is inserted into the tobacco pipe from one end of the tobacco pipe, and the heating blade is inserted into the tobacco pipe from the other end and inserted into the tobacco stick. Since the tobacco stick tends to stick to the heating blade after heating is completed, it is necessary to design a pushing mechanism to push the tobacco pipe so that the tobacco stick is separated from the heating blade. The design of the pushing mechanism is complex and prone to breakage after repeated use. In addition, when heating a tobacco stick with a heating tube, the heating tube contacts around the tobacco stick, so it usually does not cause stickiness, but the distance from the center of the tobacco stick is far, so the heating effect is not good. .

According to embodiments of the present invention, a heating body and an electromagnetic heating baking device are provided.

The electromagnetic heating baking device of the present invention includes a fixed holder, a housing tube, and a heating body. The fixed holder is provided with a magnetic induction coil, and the coil has a housing cavity surrounded by the coil. A storage tube is positioned within the storage cavity and configured to receive a baking product. The heating body is configured to be inserted into the baking article, and includes a magnetically non-conductive support column and a metal magnetic conductivity tube fitted over the magnetically non-conductive support column. The metal magnetic guide tube is configured to heat the baking product with the magnetic field generated by the magnetic induction coil.

In one embodiment, the heating body includes an insertion part, and the insertion part has a rotating body structure and is located in the housing tube to connect the hollow tubular metal magnetically conductive tube and the non-magnetically conductive support column. The outer diameter of the non-magnetically conductive support column corresponds to the inner diameter of the metal magnetically conductive tube.

In one embodiment, the electromagnetic heating baking device further includes a mounting seat, the heating body further includes a mounting portion, and the mounting seat is fitted onto the mounting portion and connected to the fixed holder.

In one embodiment, a cylindrical portion is formed at a bottom end of the fixed holder, and the cylindrical portion is configured to communicate with the accommodation tube and attach the mounting seat and the mounting portion of the heating body. The outer wall of the mounting seat is fixedly or removably connected to the inner wall of the cylindrical portion.

In one embodiment, the insertion portion includes a top portion and a body portion, the top portion and the attachment portion are respectively located at opposite ends of the heating body, and the body portion is arranged between the top portion and the attachment portion. The outer diameter of the top portion gradually decreases in the direction away from the main body portion.

In one embodiment, the top, body and mounting portion of the heating element are non-magnetically conductive support columns with matching diameters.

In one embodiment, the magnetically non-conductive support post is made of ceramic.

In one embodiment, a main body is interposed between the metal magnetic conductive tube and the mounting seat.

In one embodiment, a silicone rubber part is provided between the mounting part of the heating body and the fixed holder and mounting seat.

In one embodiment, the electromagnetic heating baking device further includes a metal tube, and the metal tube is fitted around the coil.

In one embodiment, the electromagnetic heating baking device further includes a main casing, in which a circuit board and a power source are electrically connected, and the coil is electrically connected to the circuit board. It is connected.

In one embodiment, the electromagnetic heating baking device further includes a top cover, and the receiving tube is fixed within the top cover. The top cover is fitted onto the fixed holder, and a gap is formed between the top wall of the fixed holder and the top wall of the top cover.

In one embodiment, the top cover is removably connected to the main casing.

In one embodiment, the bottom end of the outer wall of the fixed holder is fixedly connected to the inner wall of the main casing, and the top cover is removably fitted onto the upper end of the outer wall of the fixed holder.

In one embodiment, the fixed holder includes a first cylindrical body and a second cylindrical body coaxially arranged, the first cylindrical body is fitted onto the second cylindrical body, and the first cylindrical body is fitted onto the second cylindrical body, and the first cylindrical body is A first cavity portion is formed between the body and the second cylindrical body, a second cavity portion is formed within the second cylindrical body, and the coil is disposed within the first cavity portion. The receiving tube is located within the second cavity and is wound around the second cylindrical body.

The present invention further provides a heating body comprising a magnetically non-conductive support column and a metal magnetically conductive tube fitted over the magnetically non-conductive support column. A magnetic induction coil is provided outside the heating body. The metal magnetic guide tube is configured to heat the baking product with the magnetic field generated by the magnetic induction coil.

In one embodiment, the heating body includes an insertion section having a rotating body structure, and the insertion section includes the metal magnetically conductive tube having a hollow tubular shape and the non-magnetically conductive support column. The outer diameter of corresponds to the inner diameter of the metal magnetic guide tube.

The heating element and electromagnetic heating baking device of the present invention provide a magnetic induction coil outside the insertion part, so that when the coil is energized, an electromagnetic induction effect is generated between the coil and the insertion part, thereby raising the temperature of the heating element. cause. Further, in the present invention, the insertion part has a shape designed as a rotating body structure, and can be inserted into the baking object to heat the baking object. After heating and baking of a baking object such as a tobacco stick is completed, the baking object can be separated from the heating body by rotating the baking object.In this way, there is no need to provide a tobacco extrusion mechanism. The electromagnetic heating baking device of the invention has high heating efficiency, simple structure, and convenient use.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to make the above-mentioned objects, features, and advantages of the present invention clearer, preferred embodiments of the present invention will be described in detail below, as illustrated in the accompanying drawings. In the drawings, like reference numerals refer to like parts and the drawings are intentionally not to scale to scale, emphasis instead being placed upon illustrating the subject matter of the invention.
FIG. 1 is a schematic structural diagram of an electromagnetic heating baking device according to one embodiment of the present invention. FIG. 2 is a schematic exploded structural view of an electromagnetic heating baking device according to an embodiment of the present invention. FIG. 3 is a longitudinal sectional view of an electromagnetic heating baking device according to one embodiment of the present invention. FIG. 4 is an enlarged structural schematic diagram of section A in FIG. 3. FIG. 5 is a longitudinal sectional view of a fixed holder in an electromagnetic heating baking device according to one embodiment of the present invention. FIG. 6 is a longitudinal sectional view of the electromagnetic heating baking device according to one embodiment of the present invention after the top cover is connected to the storage tube. FIG. 7 is a schematic structural diagram of a heating body in an electromagnetic heating baking device according to an embodiment of the present invention. FIG. 8 is a schematic structural exploded view of a heating body in an electromagnetic heating baking device according to an embodiment of the present invention. FIG. 9 is a longitudinal sectional view of a heating body in an electromagnetic heating baking device according to one embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS In order to facilitate understanding of the present invention, the present invention will now be described more fully with reference to the accompanying drawings. In the accompanying drawings, preferred embodiments of the invention are shown. However, the invention is not limited to the embodiments described herein, but may be embodied in many different forms. Rather, these embodiments are provided so that this disclosure will be more thorough and comprehensive.

Note that when one element is referred to as being "fixed" to another element, that element may be located directly on another element, and there may be an intervening element between that element and another element. It's okay. When an element is considered to be "connected" to another element, that element may be directly connected to another element, even if there are intervening elements between the element and the other element. good. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for purposes of explanation only and do not represent the only embodiment.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art, unless defined otherwise. The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in FIG. 1, in one embodiment, the overall structure of the electromagnetic heating baking device includes a top cover 100 and a main casing 200. The top cover 100 has an opening, and the baking object 900 is inserted into the hollow interior. The exploded structure of the electromagnetic heating baking device is shown in FIG. 2. The electromagnetic heating baking device further includes a housing tube 110, a fixed holder 300, a metal tube 400, a magnetic induction coil 500, a heating element 600, a circuit board 700, and a power source 800. The magnetic induction coil 500 and the power source 800 are both electrically connected to the circuit board 700.

3 to 5, FIG. 3 shows a longitudinal sectional view of the electromagnetic heating baking device, FIG. 4 shows an enlarged structure of part A in FIG. 3, and FIG. 5 shows a longitudinal sectional view of the fixed holder 300. The fixed holder 300 includes a first cylindrical body 310 and a second cylindrical body 320 that are coaxially arranged. The first cylindrical body 310 is externally fitted onto the second cylindrical body 320, and the first cylindrical body 310 and the second cylindrical body 320 are connected at the top. A first cavity portion 330 is formed between the first cylindrical body 310 and the second cylindrical body 320. In order to facilitate insertion of the metal tube 400 and the coil 500 into the first cavity part 330 from the bottom, the first cavity part 330 is closed at the top and open at the bottom. The coil 500 is located within the first cavity section 330 and is wound around the second cylindrical body 320, and the metal tube 400 is provided within the first cavity section 330 and is fitted around the coil 500. In one specific embodiment, the metal tube 400 is an iron tube, and is tightly fitted onto the helical coil 500 by elastic clamping force to prevent electromagnetic wave leakage that occurs after the coil 500 is powered on. It is configured as follows. Note that since the insulating layer is provided on the outside of the coil 500, when the metal tube 400 is tightly fitted onto the spiral coil 500, conduction between the metal tube 400 and the coil 500 will not occur. The provision of metal tube 400 also helps protect the outer insulation layer of coil 500 from scratches or damage.

Further, as shown in FIGS. 4 and 5, a second cavity portion 340 is formed within the second cylindrical body 320. The second cavity part 340 is open at the top to facilitate insertion of the receiving tube 110 into the second cavity part 340 from the top. In specific embodiments, the receiving tube 110 is fixed within the top cover 100 or the receiving tube 110 is integrally molded with the top cover 100. FIG. 6 shows a longitudinal cross-sectional view of the housing tube 110 when it is fixed within the top cover 100. Further, since the coil 500 is wound outside the second cylindrical body 320, the accommodation cavity surrounded by the coil 500 becomes the second cavity portion 340 in the second cylindrical body 320. The accommodation tube 110 is located within the second cavity part 340 and is configured to accommodate the baking object 900 and the insertion part 660 of the heating element 600 .

As shown in FIGS. 7 and 9, the heating body 600 includes an insertion section 660 and a mounting section 630. The insertion portion 660 has a rotating body structure and is located within the accommodation tube 110. The insertion portion 660 includes a top portion 610 and a main body portion 620, the mounting portion 630 and the top portion 610 are respectively located at opposite ends of the heating body 600, and the main body portion 620 includes a top portion 610 and a main body portion 620. It is located between. In order to facilitate insertion of the insertion part 660 into the baked goods 900, the outer diameter of the top part 610 gradually decreases in the direction away from the main part 620.

Further, as shown in FIG. 9, the electromagnetic heating baking device further includes a mounting seat 640. The mounting seat 640 is configured to be fitted onto the mounting portion 630 of the heating body 600 and to mount the heating body 600 into the fixed holder 300. As shown in FIG. 5, a cylindrical portion 350 is formed at the bottom end of the second cylindrical body 320 of the fixed holder 300, which is coaxial and has a smaller diameter than the diameter of the second cylindrical body 320. There is. A first opening 370 is provided in the bottom plate 360 between the second cylindrical body 320 and the cylindrical portion 350. As shown in FIG. 6, in order to facilitate communication between the cylindrical portion 350 and the accommodation tube 110, a second opening 111 is provided at the bottom of the accommodation tube 110, corresponding to the position of the first opening 370. . As shown in FIG. 4, the cylindrical portion 350 is configured to attach a mounting portion 630 and a mounting seat 640 of the heating body 600. The insertion portion 660 of the heating body 600 is inserted into the housing tube 110 through the cylindrical portion 350, and the top portion 610 has a sharp conical shape. When a baking article 900 such as a tobacco stick is inserted into the receiving tube 110, the insertion part 660 can be easily inserted into the baking article 900 with the sharp top 610, further facilitating heating of the baking article 900. Further, since the insertion portion 660 of the heating body 600 has a rotating body structure, the baking thing 900 such as a tobacco stick can be separated from the heating body 600 by rotating the baking thing 900 after heating and baking of the baking thing 900 is completed. There is no need to provide a tobacco extrusion mechanism.

Referring to FIGS. 7 to 9, the insertion portion 660 includes a hollow tubular metal magnetically conductive tube 621 and a non-magnetically conductive support column 622. The outer diameter of the non-magnetically conductive support column 622 corresponds to the inner diameter of the metal magnetically conductive tube 621. The metal magnetically conductive tube 621 is fitted onto a non-magnetically conductive support column 622 . After the coil 500 is energized, an alternating magnetic field is generated inside the housing tube 110, and the metal conductive tube 621 cuts the alternating lines of magnetic force, thereby generating an eddy current. The electrons in the metal magnetic conductive tube 621 perform random motion at high speed due to eddy currents, collide with each other, cause friction, and generate thermal energy, thereby playing a heating role. In a specific embodiment, the heating temperature of the heating body 600 can be controlled by controlling the intensity and duration of the current in the coil 500. Also, in one specific embodiment, the magnetically non-conductive support post may be a ceramic support post, a glass support post, or a high temperature resistant plastic support post. When the non-magnetically conductive support column is a ceramic support column, the metal magnetic conductive tube 621 is fitted onto the ceramic support column before sintering the ceramic support column, and then the metal magnetic conductive tube 621 is sintered and formed together with the ceramic support column. By doing so, the bonding force between the metal magnetic guide tube 621 and the ceramic support column can be improved. In addition, the ceramic support column has slow heat dissipation, can fully utilize the heat generated by the metal magnetic guide tube 621, and has the characteristics of easy moldability and high strength.

In one specific embodiment, as shown in FIGS. 7-9, the top 610, body 620, and mounting portion 630 of the heating element 600 are integrally molded ceramic support post structures. Here, both the top portion 610 and the main body portion 620 have a rotating body structure. More specifically, the top portion 610 has a conical structure, the main body portion 620 has a cylindrical structure, and the diameter of the end of the top portion 610 close to the main body portion 620 matches the diameter of the main body portion 620, while the attachment portion 630 is a non-rotating body structure. In other embodiments, the main body portion 620 and the attachment portion 630 may have a cylindrical structure with different diameters, and the top portion 610 may have a conical structure, or the main body portion 620 and the attachment portion 630 may have a cylindrical structure with the same diameter. It can be appreciated that if the top 610 is a spire structure, the diameter of the end of the top 610 proximate to the body 620 may match the diameter of the body 620 .

Further, as shown in FIG. 4, the top cover 100 is fitted onto the fixed holder 300. In order to prevent the top cover 100 from overheating, a gap is formed between the top wall of the fixed holder 300 and the top wall of the top cover 100 for heat insulation. The top cover 100 has the same outer diameter as the main casing 200 and is in contact with the main casing 200. The bottom end of the outer wall of the first cylindrical body 310 of the fixed holder 300 is fixedly connected to the inner wall of the main casing 200. The top cover 100 is removably fitted onto the upper end of the outer wall of the first cylindrical body 310 of the fixed holder 300 . The removable form is not limited, and in a specific embodiment, the top cover 100 is removable to the upper end of the outer wall of the first cylindrical body 310 of the fixed holder 300 with a vertical sliding structure, a snap-fit structure, or a threaded structure. It may be fitted externally. In other embodiments, the top cover 100 may be fitted onto the main casing 200 or inserted into the main casing 200, and may have a vertical sliding structure, a snap-fit structure, a threaded structure, etc. It is connected to the main casing 200 by removable means. The removable structure of the top cover 100 makes it convenient to clean the storage tube 110 inside the top cover 100.

Furthermore, when a baking object 900 such as a tobacco stick is inserted into the housing tube 110, a downward force is applied to the heating element 600. The outer wall is fixedly or removably connected to the inner wall of the cylindrical portion 350 of the fixed holder 300. The form of the fixed connection is not limited, and in specific embodiments, the outer wall of the mounting seat 640 and the inner wall of the cylindrical portion 350 of the fixed holder 300 may be fixedly connected by adhesive, or fixedly connected by interference fit. may be done. The removable shape is not limited, and in a specific embodiment, the outer wall of the mounting seat 640 and the inner wall of the cylindrical portion 350 of the fixed holder 300 are connected by a snap fit means or a screw thread means.

In the electromagnetic heating baking device of the present invention, the heating body 600 generates heat by cutting alternating lines of magnetic force, and the heating body 600 is not provided with a heating circuit. Compared with the heating element of traditional electric resistance heating, the heating element 600 in the electromagnetic heating baking device of the present invention has a simpler structure, longer service life, and does not need to be replaced frequently. Therefore, by fixedly connecting the outer wall of the mounting seat 640 and the inner wall of the cylindrical portion 350 of the fixed holder 300, the heating body 600 and the fixed holder 300 can be fixedly connected, and a baking object 900 such as a tobacco stick can be accommodated. It is possible to prevent the heating body 600 from coming off the fixed holder 300 when the tube 110 is inserted. It can be appreciated that in some embodiments, the outer wall of the mounting seat 640 and the inner wall of the cylindrical portion 350 of the fixed holder 300 may be removably connected. By removably connecting the heating element 600 and the fixed holder 300 in this manner, it is possible not only to prevent the heating element 600 from coming off the fixed holder 300, but also to facilitate replacement of the heating element 600.

As shown in FIG. 9, the metal magnetic conductive tube 621 and the mounting seat 640 are formed with a gap between them, and thus can be effectively insulated, i.e., the heat is not close to the electronic components. It is possible to prevent heat from being transferred to the mounting seat 640, and in turn, it is possible to prevent heat from being transferred to the electronic components. Further, as shown in FIGS. 4 and 9, a silicone rubber portion 650 is provided between the attachment portion 630 of the heating body 600 and the fixed holder 300. Since the silicone rubber part 650 can withstand high temperatures of 200° C. or more, the provision of the silicone rubber part 650 can make the connection between the heating body 600 and the fixed holder 300 more stable and reliable, and can be used for cigarette sticks, etc. The liquid formed after the baking product 900 is heated can be prevented from flowing into the baking device.

In one embodiment, the assembly process of the electromagnetic heating baking device is as follows. First, after fitting the metal tube 400 onto the coil 500, the metal tube 400 and the coil 500 are inserted into the first cavity part 330 of the fixed holder 300 from the bottom end of the fixed holder 300, and the heating body 600 is inserted into the fixed holder 300. It is attached by penetrating the cylindrical part 350 at the bottom end and inserting it into the second cavity part 340 of the fixed holder 300. Next, a circuit board 700 and a power source 800 electrically connected to the coil 500 are provided in the main casing 200, and the bottom end of the outer wall of the first cylindrical body 310 of the fixed holder 300 is connected to the main casing by a connecting means such as a snap fit. A fixed connection is made to the inner wall of the casing 200. Finally, the top cover 100 is removably fitted onto the upper end of the outer wall of the first cylindrical body 310 of the fixed holder 300, and the bottom surface of the top cover is connected to the upper end surface of the main casing in a facing manner. The housing tube 110 is inserted into the second cavity part 340 of the fixed holder 300 (the top cover and the housing tube may be connected by a snap fit), and the insertion part 660 of the heating body 600 is positioned inside the housing tube 110. When a baking object 900 such as a tobacco stick is inserted into the receiving tube 110, the insertion part 660 of the heating element 600 can be inserted into the baking object, which is convenient for heating the baking object 900. In other embodiments, the containment tube and top cover may be integrally molded.

In the embodiment shown in FIG. 4, the baking article 900 is a tobacco stick and includes, in order from top to bottom, a filter 910, a fiber tube 920, a support tube 930, and a tobacco leaf part 940, where the tobacco leaf part 940 is wrinkled. containing bundles of tobacco leaves. When the tobacco stick is inserted into the housing tube 110, the heating element 600 is inserted into the tobacco leaf part 940, and can further heat the tobacco leaf part 940. The hollow support tube 930 is for separating the tobacco leaf part 940 and the fiber tube 920, and when the heating body 600 is inserted into the tobacco leaf part 940, the tobacco leaf part 940 moves toward the fiber tube 920. You can prevent being pushed. Fiber tube 920 has a plurality of longitudinally extending channels. Filter 910 is a conventional filter 910 formed of cellulose acetate.

The heating body and the electromagnetic heating baking device of the present invention provide the magnetic induction coil 500 outside the insertion portion 660, so that when the coil 500 is energized, an electromagnetic induction effect is generated between the coil 500 and the insertion portion 660, and heating is achieved. Causes temperature rise in the body 600. Further, in the present invention, the insertion part 660 has a shape designed as a rotating body structure, and can be inserted into the baking object to heat the baking object 900. After heating and baking of the baking object 900 such as a tobacco stick is completed, the baking object 900 can be separated from the heating body 600 by rotating the baking object 900, and thus it is necessary to provide a tobacco extrusion mechanism. Therefore, the electromagnetic heating baking device of the present invention has high heating efficiency, simple structure, and convenient use.

The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of each technical feature in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, it should be considered within the scope of this specification.

It should be understood that the embodiments described above represent some embodiments of the present invention, and although the descriptions thereof are detailed and specific, they do not limit the scope of the claims of the present invention. be. It should be noted that even if a person skilled in the art makes multiple modifications and improvements without departing from the spirit of the present invention, they still fall within the protection scope of the present invention. Therefore, the protection scope of the present invention is based on the claims.

Claims (14)

An electromagnetic heating baking device,
Comprising a fixed holder, a housing tube, and a heating element,
The fixed holder is provided with a magnetic induction coil,
A housing cavity is formed in the coil and surrounded by the coil,
The storage tube is located within the storage cavity and is configured to receive a baking product;
The heating body is configured to be inserted into the baking article, and includes a non-magnetically conductive support column and a metal magnetically conductive tube fitted around the non-magnetically conductive support column,
The metal magnetic guide tube is configured to heat the baked goods with a magnetic field generated by the magnetic induction coil ,
The heating body includes an insertion portion inserted into the baking product,
The insertion part has a rotating body structure, is located in the housing tube, and includes the hollow tubular metal magnetically conductive tube and the non-magnetically conductive support column,
The electromagnetic heating baking device, wherein an outer diameter of the non-magnetically conductive support column corresponds to an inner diameter of the metal magnetically conductive tube . Also equipped with a mounting seat,
The heating body further includes a mounting part,
The electromagnetic heating baking device according to claim 1, wherein the mounting seat is fitted onto the mounting portion and connected to the fixed holder. A cylindrical portion is formed at the bottom end of the fixed holder,
The cylindrical portion is configured to communicate with the housing tube and attach the mounting seat and the mounting portion of the heating body,
The electromagnetic heating baking device according to claim 2 , wherein the outer wall of the mounting seat is fixedly or removably connected to the inner wall of the cylindrical portion. The insertion part includes a top part and a main body part,
The top portion and the mounting portion are respectively located at opposite ends of the heating body, and the main body portion is located between the top portion and the mounting portion,
The electromagnetic heating baking device according to claim 2 , wherein the outer diameter of the top portion gradually decreases in a direction away from the main body portion. The electromagnetic heating baking device according to claim 4 , wherein the top portion of the heating body, the main body portion, and the attachment portion are non-magnetically conductive support columns having the same diameter. The electromagnetic heating baking device according to claim 1 or 5 , wherein the non-magnetically conductive support column is made of ceramic. The electromagnetic heating baking device according to claim 2 , wherein a main body is interposed between the metal magnetic conductive tube and the mounting seat. The electromagnetic heating baking device according to claim 2 , wherein a silicone rubber portion is provided between the mounting portion of the heating body, the fixed holder, and the mounting seat. Further equipped with a metal tube,
The electromagnetic heating baking device according to claim 1, wherein the metal tube is fitted onto the coil. Further comprising a main casing,
An electrically connected circuit board and a power source are provided in the main casing,
The electromagnetic heating baking device according to claim 1, wherein the coil is electrically connected to the circuit board. Also includes a top cover,
The accommodation tube is fixed within the top cover,
The top cover is fitted onto the fixed holder,
The electromagnetic heating baking device according to claim 10 , wherein a gap is formed between the top wall of the fixed holder and the top wall of the top cover. The electromagnetic heating baking device according to claim 11 , wherein the top cover is removably connected to the main casing. a bottom end of the outer wall of the fixed holder is fixedly connected to the inner wall of the main casing;
The electromagnetic heating baking device according to claim 11 , wherein the top cover is removably fitted onto the upper end of the outer wall of the fixed holder. The fixed holder includes a first cylindrical body and a second cylindrical body coaxially arranged,
The first cylindrical body is fitted onto the second cylindrical body,
A first cavity portion is formed between the first cylindrical body and the second cylindrical body,
A second cavity portion is formed within the second cylindrical body,
The coil is located within the first cavity and is wound around the second cylindrical body,
The electromagnetic heating baking device according to claim 1, wherein the housing tube is located within the second cavity.