Electromagnetic heating device

Abstract

The utility model discloses an electromagnetic heating device, which belongs to the technical field of electromagnetic heating devices, solves the problem that normal use of radiating fins is affected due to the fact that induction current is easily conducted to the radiating fins by an anti-radiation ring, and adopts the technical scheme that the electromagnetic heating device mainly comprises a base, an electromagnetic coil panel and a main control board are arranged in the base; an anti-radiation ring is arranged on the periphery of the electromagnetic coil panel in a surrounding mode, a radiator is installed on the main control panel, the anti-radiation ring is sleeved with an insulation sleeve, the insulation sleeve is located on the anti-radiation ring and partially located between the radiator and the anti-radiation ring, and the anti-radiation ring and the radiator are kept insulated through the insulation sleeve. The utility model is mainly used for reducing the possibility that the radiator is influenced by induced current.

Description

Technical Field

[0001] The utility model shows an electromagnetic heating device, belonging to the technical field of electromagnetic heating devices. Background Art

[0002] With the development and promotion of the small household appliance industry, electromagnetic heating devices are deeply loved by consumers because of their advantages such as easy portability and fast heating. The existing electromagnetic heating devices include a base and a panel assembly. An electromagnetic coil disk is provided in the base. The electromagnetic coil disk generates heat when energized, thereby forming a heating area on the panel assembly to achieve heating of the cookware.

[0003] The electromagnetic coil disk will generate electromagnetic radiation during the heating process. In the prior art, a radiation-proof ring is usually arranged around the outer periphery of the electromagnetic coil disk to reduce the electromagnetic radiation, thereby making the use of the electromagnetic heating device safer and more reliable. However, in the prior art, the distance between the radiation-proof ring and the heat sink is small and may even contact with it. At the same time, the radiation-proof ring will generate induced current under the action of the electromagnetic coil disk. The radiation-proof ring can easily conduct the induced current to the heat sink, thereby affecting the normal use of the heat sink and may even cause damage to the heat sink. Utility Model Content

[0004] The utility model aims to solve the problem that the anti-radiation ring easily conducts the induced current to the heat sink and affects the normal use of the heat sink. For this purpose, an electromagnetic heating device is provided, which insulates the anti-radiation ring from the radiator through an insulating sleeve to reduce the possibility that the radiator is affected by the induced current.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An electromagnetic heating device comprises a base, wherein an electromagnetic coil disk and a main control board are arranged in the base, an anti-radiation ring is arranged around the outer circumference of the electromagnetic coil disk, a radiator is installed on the main control board, an insulating sleeve is arranged on the anti-radiation ring, the insulating sleeve is positioned on the anti-radiation ring and partially located between the radiator and the anti-radiation ring, and the anti-radiation ring and the radiator are insulated by the insulating sleeve.

[0007] The beneficial effects of adopting the utility model are:

[0008] The anti-radiation ring described in the utility model is provided with an insulating sleeve, and the insulating sleeve is partially located between the radiator and the anti-radiation ring. The insulating sleeve can separate the anti-radiation ring from the radiator, so that the anti-radiation ring and the radiator are insulated, thereby effectively preventing the induced current generated by the anti-radiation ring from being transmitted to the radiator, reducing the possibility of the radiator being damaged by the induced current, helping to increase the service life of the radiator, maintaining the heat dissipation effect of the radiator, and allowing the main control board to obtain good heat dissipation; in addition, the insulating sleeve is positioned on the anti-radiation ring to maintain a stable connection between the insulating sleeve and the anti-radiation ring, reducing the possibility of relative sliding between the insulating sleeve and the anti-radiation ring, and helping to maintain the insulating effect of the insulating sleeve; secondly, the insulating sleeve is used to insulate the anti-radiation ring and the heat sink, which can reduce the insulation cost. At the same time, the production and installation of the insulating sleeve are relatively simple and convenient, which can improve the assembly efficiency of the insulating sleeve and the anti-radiation ring. In addition, the replacement of the insulating sleeve is relatively convenient, which can improve the maintainability of the insulating sleeve, and help to reduce the maintenance cost.

[0009] Preferably, at least part of the insulating sleeve is interference fit with the anti-radiation ring to achieve the positioning of the insulating sleeve; or, there is resistance between the insulating sleeve and the anti-radiation ring to limit the relative sliding of the insulating sleeve and the anti-radiation ring. By adopting the above-mentioned technical solution, the interference fit between the insulating sleeve and the anti-radiation ring can improve the positioning stability of the insulating sleeve and reduce the possibility of positional displacement of the insulating sleeve, thereby ensuring that the insulating sleeve separates the anti-radiation ring and the heat sink so that the anti-radiation ring and the heat sink are insulated; or, by increasing the resistance between the insulating sleeve and the anti-radiation ring, the relative sliding of the insulating sleeve and the anti-radiation ring can be effectively limited, while maintaining the stable positioning of the insulating sleeve, the difficulty of installing and removing the insulating sleeve can be reduced, which helps to improve the assembly and maintenance efficiency of the insulating sleeve.

[0010] Preferably, the anti-radiation ring is provided with a positioning protrusion, and the insulating sleeve is positioned on the anti-radiation ring through the positioning protrusion. With the above technical solution, the positioning protrusion can position the insulating sleeve, making the positioning of the insulating sleeve more accurate and reliable, which helps to improve the positioning accuracy of the insulating sleeve.

[0011] Preferably, the insulating sleeve is a heat shrinkable sleeve, and the heat generated by the electromagnetic heating device shrinks the insulating sleeve and fits tightly to the surface of the anti-radiation ring. The above-mentioned technical solution is adopted, and the insulating sleeve adopts a heat shrinkable sleeve. When the insulating sleeve is heated, it will shrink and fit tightly to the surface of the anti-radiation ring, which can further improve the positioning stability of the insulating sleeve and the anti-radiation ring, and can also effectively prevent the leakage of charge, further reduce the influence of the induced current on the radiator, and help to improve the insulation performance of the insulating sleeve, thereby ensuring the safe operation of the radiator; in addition, the insulating sleeve is positioned by itself and the anti-radiation ring or by the positioning protrusion, so as to avoid the relative sliding of the insulating sleeve and the anti-radiation ring. When the electromagnetic heating device is running, the heat generated by the electromagnetic heating device can automatically shrink the insulating sleeve, and then the insulating sleeve and the anti-radiation ring can be further fixed. At the same time, the insulating sleeve is heated by the electromagnetic heating device, which can realize the automatic fixation of the insulating sleeve, reduce the steps of manual heating, and effectively improve the assembly efficiency of the electromagnetic heating device.

[0012] Preferably, the anti-radiation ring has a first end and a second end, and the first end and the second end are fixedly connected to each other and form the positioning protrusion, so that the anti-radiation ring is arranged in a ring shape around the outer peripheral side of the electromagnetic coil disk. With the above-mentioned technical solution, the first end and the second end of the anti-radiation ring are fixed to each other, which can keep the overall shape of the anti-radiation ring stable, and prevent the first end and the second end from being separated from each other and causing damage to the internal structure of the electromagnetic heating device; in addition, a positioning protrusion is formed at the connection between the first end and the second end, which can increase the area of ​​the connection between the first end and the second end, thereby reducing the resistance of the connection between the first end and the second end, making it less likely to heat up, and effectively preventing the connection from overheating and causing damage to the internal structure of the electromagnetic heating device.

[0013] Preferably, the outer circumference of the electromagnetic coil disk is provided with a plurality of slots for installing the anti-radiation ring, one of which is close to the radiator, and the positioning protrusion is embedded in the slot so that part of the insulating sleeve is between the radiator and the anti-radiation ring. By adopting the above-mentioned technical scheme, the slot can position the anti-radiation ring so that the anti-radiation ring is stably arranged around the outer circumference of the electromagnetic coil disk, and the effect of the anti-radiation ring in reducing electromagnetic radiation is maintained; in addition, one of the slots is close to the radiator, and when the positioning protrusion is embedded in the slot, part of the insulating sleeve can be placed between the radiator and the anti-radiation ring. Through the cooperation of the slot and the positioning protrusion, the insulating sleeve and the radiator can be quickly positioned, which is helpful to realize automated installation, thereby improving the installation efficiency of the anti-radiation ring and reducing the production cost of the electromagnetic heating device.

[0014] Preferably, the insulating sleeve is a heat shrinkable sleeve, which shrinks when heated and adheres closely to the surface of the anti-radiation ring to achieve the positioning of the insulating sleeve. The above technical solution is adopted to achieve the positioning of the insulating sleeve through the heat shrinkage performance of the insulating sleeve, so that the insulating sleeve and the anti-radiation ring are kept in close contact, which helps to improve the positioning stability of the insulating sleeve.

[0015] Preferably, the anti-radiation ring has a first end and a second end, and a plurality of slots are provided on the outer peripheral side of the electromagnetic coil disk, and the first end and the second end are embedded in the same slot so that the first end and the second end are against each other. The above-mentioned technical solution is adopted, and the first end and the second ring are positioned by the slot, so that the anti-radiation ring as a whole maintains a ring shape, thereby realizing the fixation of the anti-radiation ring. The anti-radiation ring adopts a non-closed type, which can save the connection of the two ends of the anti-radiation ring, which helps to speed up the assembly efficiency of the electromagnetic heating device; in addition, when the insulating sleeve needs to be replaced, the anti-radiation ring can be removed to disassemble the insulating sleeve, and there is no need to cut the anti-radiation ring, which can reduce the difficulty of replacing the insulating sleeve and also reduce the maintenance cost.

[0016] Preferably, the heat sink includes a fixing seat and a plurality of heat sinks, the heat sinks are spaced apart on the fixing seat, the heat sinks include a first heat sink and a second heat sink, the first heat sink is located at one end of the fixing seat close to the electromagnetic coil disk, and the first heat sink is provided with an escape space for escaping the anti-radiation ring. By adopting the above technical solution, the escape space can avoid direct contact between the insulating sleeve and the first heat sink, prevent the insulating sleeve and the first heat sink from being worn due to long-term contact, help extend the service life of the insulating sleeve, and maintain the insulation performance of the insulating sleeve.

[0017] Preferably, a notch matching the anti-radiation ring is provided on the top of the first heat sink, and the notch forms the avoidance space; or, the height of the first heat sink is less than the height of the second heat sink, the first heat sink is located at the lower side of the anti-radiation ring, and the upper side of the first heat sink forms the avoidance space, and the height of the first heat sink gradually decreases as the first heat sink approaches the electromagnetic coil disk; or, the height of the first heat sink remains the same. With the aforementioned technical solution, the first heat sink achieves the avoidance effect by providing the notch, and the heat dissipation effect of the first heat sink can be maintained while avoiding the air; or, the first heat sink is stepped at the lower side of the avoidance space, and the closer the first heat sink is to the electromagnetic coil disk, the smaller the height is, which can effectively reduce the influence of the electromagnetic coil disk on the first heat sink, and help to extend the service life of the first heat sink; or, the height of the first heat sink remains the same, which can reduce the processing difficulty of the first heat sink, and help to improve the assembly efficiency of the electromagnetic heating device.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of an electromagnetic heating device of the utility model;

[0021] Figure 2This is a top view of an electromagnetic heating device of the utility model;

[0022] Figure 3 for Figure 2 A partial enlarged view of part A;

[0023] Figure 4 This is a cross-sectional view of an electromagnetic heating device of the utility model;

[0024] Figure 5 for Figure 4 A partial enlarged view of part B;

[0025] Figure 6 It is a partial enlarged view of the anti-radiation ring in an electromagnetic heating device of the utility model;

[0026] Figure 7 It is a partial enlarged view of the radiator in the second embodiment of the utility model.

[0027] Figure numerals: 1. base; 2. electromagnetic coil disk; 21. anti-radiation ring; 211. positioning protrusion; 212. insulating sleeve; 22. socket; 221. slot; 3. radiator; 31. fixing seat; 32. heat sink; 321. first heat sink; 322. second heat sink; 33. avoidance space; 4. cooling fan; 5. main control board. DETAILED DESCRIPTION

[0028] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] like Figures 1 to 6 As shown, this embodiment shows an electromagnetic heating device, including a base 1, in which an electromagnetic coil disk 2, a main control board 5 and a cooling fan 4 are arranged, a radiator 3 is installed on the main control board 5, and the radiator 3 is located on the side of the main control board 5 close to the cooling fan 4. When the electromagnetic heating device is powered on, the electromagnetic coil disk 2 is controlled by the main control board 5 to heat up, so as to cook the pot. When the electromagnetic heating device is running, both the electromagnetic coil disk 2 and the main control board 5 will generate heat. In order to prevent the main control board 5 from running in a high temperature environment for a long time, the cooling fan 4 will form an airflow and guide the airflow to the main control board 5, and the airflow will exchange heat with the radiator 3, so as to achieve heat dissipation of the main control board 5; in addition, an anti-radiation ring 21 is provided on the outer peripheral side of the electromagnetic coil disk 2, and an insulating sleeve 212 is provided on the anti-radiation ring 21, and the insulating sleeve 212 is positioned at the anti-radiation ring 21 and is partially located between the radiator 3 and the anti-radiation ring 21, and the anti-radiation ring 21 and the radiator 3 are insulated by the insulating sleeve 212.

[0034] In this embodiment, an insulating sleeve 212 is sleeved on the anti-radiation ring 21, and the insulating sleeve 212 is partially located between the radiator 3 and the anti-radiation ring 21. The insulating sleeve 212 can separate the anti-radiation ring 21 and the radiator 3, so that the anti-radiation ring 21 and the radiator 3 are insulated, thereby effectively preventing the induced current generated by the anti-radiation ring 21 from being transmitted to the radiator 3, reducing the possibility of the radiator 3 being damaged by the induced current, helping to increase the service life of the radiator 3, maintaining the heat dissipation effect of the radiator 3, and allowing the main control board 5 to obtain good heat dissipation; in addition, the insulating sleeve 212 is positioned on the anti-radiation ring 21 First, the connection between the insulating sleeve 212 and the anti-radiation ring 21 remains stable, the possibility of relative sliding between the insulating sleeve 212 and the anti-radiation ring 21 is reduced, and it helps to maintain the insulation effect of the insulating sleeve 212; secondly, the insulating sleeve 212 is used to insulate the anti-radiation ring 21 and the heat sink 32, which can reduce the insulation cost. At the same time, the manufacture and installation of the insulating sleeve 212 are relatively simple and convenient, which can improve the assembly efficiency of the insulating sleeve 212 and the anti-radiation ring 21. In addition, the replacement of the insulating sleeve 212 is relatively convenient, which can improve the maintainability of the insulating sleeve 212 and help reduce maintenance costs.

[0035] like Figures 1 to 3 As shown, the anti-radiation ring 21 described in this embodiment includes an anti-radiation rod, which has a first end and a second end. The first end and the second end of the anti-radiation rod are connected to form a ring-shaped anti-radiation ring 21. During the assembly process, the first end or the second end of the anti-radiation rod is first inserted into the insulating sleeve 212, so that the insulating sleeve 212 is sleeved on the anti-radiation rod, and the first end and the second end are abutted to form the anti-radiation ring 21. Then, the first end and the second end are welded to achieve a fixed connection between the first end and the second end. At the same time, a positioning protrusion 211 is formed at the connection between the first end and the second end. One end of the insulating sleeve 212 is sleeved on the positioning protrusion 211 and has an interference fit with the positioning protrusion 211, so as to achieve relative fixation of the insulating sleeve 212 and the anti-radiation ring 21. When the anti-radiation ring 21 is installed on the outer peripheral side of the electromagnetic coil disk 2, part of the insulating sleeve 212 is between the anti-radiation ring 21 and the radiator 3, so that the anti-radiation ring 21 and the radiator 3 are kept insulated.

[0036] In this embodiment, the insulating sleeve 212 is positioned by the positioning protrusion 211, which helps to improve the positioning stability of the insulating sleeve 212 and reduce the possibility of position displacement of the insulating sleeve 212, thereby ensuring that the insulating sleeve 212 separates the anti-radiation ring 21 and the heat sink 32, so that the anti-radiation ring 21 and the heat sink 32 remain insulated; in addition, in the mass production process, one end of the insulating sleeve 212 is sleeved on the positioning protrusion 211, which can ensure that the insulating sleeve 212 is positioned at the connection between the first end and the second end, so that the finished anti-radiation ring 21 can be kept as consistent as possible, so as to facilitate consistency control in mass production.

[0037] In order to further improve the positioning stability of the insulating sleeve 212, the insulating sleeve 212 described in this embodiment is a heat shrinkable sleeve. When the insulating sleeve 212 is heated, it will shrink, thereby reducing the diameter of the insulating sleeve 212, so that the insulating sleeve 212 can fit tightly against the surface of the anti-radiation ring 21, preventing relative sliding between the insulating sleeve 212 and the anti-radiation ring 21, improving the positioning stability of the insulating sleeve 212 and the anti-radiation ring 21, and also effectively preventing the leakage of charge, further reducing the influence of the induced current on the radiator 3, helping to improve the insulation performance of the insulating sleeve 212, thereby ensuring the safe operation of the radiator 3.

[0038] It should be noted that the insulating sleeve 212 described in the present embodiment is heated and contracted during the operation of the electromagnetic heating device. When the electromagnetic heating device is assembled, one end of the insulating sleeve 212 is interference fit with the positioning protrusion 211 to achieve the initial positioning of the insulating sleeve 212, and the insulating sleeve 212 is partially located between the anti-radiation ring 21 and the radiator 3, so that the anti-radiation ring 21 and the radiator 3 are insulated. Under the action of the positioning protrusion 211, the relative sliding of the insulating sleeve 212 and the anti-radiation ring 21 can be limited to ensure that the insulating sleeve 212 is not easily displaced during transportation or use of the electromagnetic heating device; and when the electromagnetic heating device is started, the electromagnetic coil disk 2 and the main control board 5 will generate heat. At this time, the insulating sleeve 212 will gradually contract after being heated, so as to fit tightly to the surface of the anti-radiation ring 21, so as to achieve further fixation of the insulating sleeve 212 and the anti-radiation ring 21. By heating the insulating sleeve 212 with the electromagnetic heating device, the insulating sleeve 212 can be automatically fixed, the steps of manual heating can be reduced, and the assembly efficiency of the electromagnetic heating device can be effectively improved.

[0039] Of course, it is understandable that in other embodiments, the insulating sleeve 212 can also be heated artificially to make the insulating sleeve 212 fit tightly on the anti-radiation ring 21, thereby ensuring that the anti-radiation ring 21 and the radiator 3 are insulated through the insulating sleeve 212.

[0040] Of course, it is understandable that in other embodiments, the positioning protrusion 211 may not be located at the connection between the first end and the second end, but may be set at any other position of the anti-radiation ring 21; similarly, the positioning protrusion 211 may also be a bump protruding from the surface of the anti-radiation ring 21, and the insulating sleeve 212 may form an interference fit with the positioning protrusion 211 through its own elasticity, or a positioning hole for the positioning protrusion 211 to pass through may be set on the insulating sleeve 212, and the positioning of the insulating sleeve 212 is achieved by the cooperation between the positioning hole and the positioning protrusion 211.

[0041] like Figure 6As shown, in this embodiment, the first end and the second end are fixedly connected by welding, and an annular positioning protrusion 211 is formed at the connection between the first end and the second end, that is, the diameter of the positioning protrusion 211 is larger than the diameter of the first end and the second end. Fixing by welding can make the connection between the first end and the second end more firm and reliable, thereby keeping the overall shape of the anti-radiation ring 21 stable, and preventing the first end and the second end from separating from each other and causing damage to the internal structure of the electromagnetic heating device; in addition, forming the positioning protrusion 211 at the connection between the first end and the second end can increase the area of ​​the connection between the first end and the second end, thereby reducing the resistance of the connection between the first end and the second end. Because the anti-radiation ring 21 will generate induced current under the action of the electromagnetic coil disk 2, when the induced current passes through the connection, the connection is not easy to heat up, which can effectively prevent the connection from overheating and causing damage to the internal structure of the electromagnetic heating device.

[0042] like Figure 3 As shown, a plurality of sockets 22 are provided on the outer peripheral side of the electromagnetic coil disk 2 in this embodiment, and the sockets 22 extend outward in the radial direction of the electromagnetic coil disk 2, and a slot 221 for fixing the anti-radiation ring 21 is provided on the socket 22, and one of the sockets 22 is close to the radiator 3. When the positioning protrusion 211 is embedded in the slot 221, the portion of the anti-radiation ring 21 provided with the insulating sleeve 212 is located on the upper side of the radiator 3, so that the insulating sleeve 212 insulates the anti-radiation ring 21 and the radiator 3. Through the cooperation of the slot 221 and the positioning protrusion 211, the insulating sleeve 212 and the radiator 3 can be quickly positioned, which is helpful to realize automated installation, thereby improving the installation efficiency of the anti-radiation ring 21 and reducing the production cost of the electromagnetic heating device.

[0043] Of course, it is understandable that in other embodiments, the anti-radiation ring 21 may also be of a non-closed type, that is, the first end and the second end are not fixedly connected. In this embodiment, the first end and the second end are embedded in the same slot 221, so that the first end and the second end are kept against each other, and the first end and the second end are positioned by the slot 221 to keep the anti-radiation ring 21 in a ring shape as a whole, thereby achieving the fixation of the anti-radiation ring 21. The non-closed type of the anti-radiation ring 21 can eliminate the connection between the two ends of the anti-radiation ring 21, which helps to speed up the assembly efficiency of the electromagnetic heating device; in addition, when the insulating sleeve 212 needs to be replaced, the anti-radiation ring 21 can be removed to disassemble the insulating sleeve 212 without cutting the anti-radiation ring 21, which can reduce the difficulty of replacing the insulating sleeve 212 and also reduce the maintenance cost.

[0044] like Figure 4 and Figure 5As shown, the radiator 3 in this embodiment includes a fixing seat 31 and a plurality of heat sinks 32. The heat sinks 32 are spaced apart on the fixing seat 31. The heat sinks 32 include a first heat sink 321 and a second heat sink 322. The first heat sink 321 is located at one end of the fixing seat 31 close to the electromagnetic coil disk 2 and at the lower side of the anti-radiation ring 21. The first heat sink 321 is provided with an avoidance space 33 for avoiding the anti-radiation ring 21. The avoidance space 33 can avoid direct contact between the insulating sleeve 212 and the first heat sink 321, prevent the insulating sleeve 212 and the first heat sink 321 from being worn due to long-term contact, help extend the service life of the insulating sleeve 212, and maintain the insulation performance of the insulating sleeve 212.

[0045] like Figure 5 As shown, in this embodiment, the height of the first heat sink 321 is less than the height of the second heat sink 322, the first heat sink 321 is located at the lower side of the anti-radiation ring 21, and the upper side of the first heat sink 321 forms an avoidance space 33, and the height of the first heat sink 321 gradually decreases as the first heat sink 321 approaches the electromagnetic coil disk 2, that is, the first heat sink 321 is stepped as a whole. Since the first heat sink 321 is located at one end of the fixing seat 31 close to the electromagnetic coil disk 2, the closer the first heat sink 321 is to the end of the fixing seat 31, the worse the heat dissipation effect can be achieved. Therefore, the height of the first heat sink 321 gradually decreases as the first heat sink 321 approaches the electromagnetic coil disk 2, and will not have a significant impact on the overall heat dissipation effect of the radiator 3. Correspondingly, the first heat sink 321 is close to the electromagnetic coil disk 2 and is easily affected by the high temperature of the electromagnetic coil disk 2. Therefore, the closer the first heat sink 321 is to the electromagnetic coil disk 2, the smaller the height is, which can effectively reduce the impact of the electromagnetic coil disk 2 on the first heat sink 321, and help to extend the service life of the first heat sink 321.

[0046] Embodiment 2:

[0047] like Figure 7 As shown, the main difference between this embodiment and the first embodiment is that in this embodiment, the height of the first heat sink 321 is less than the height of the second heat sink 322, and the height of the first heat sink 321 remains equal, thereby forming an avoidance space 33 on the upper side of the first heat sink 321. The height of the first heat sink 321 remains equal, which can reduce the processing difficulty of the first heat sink 321 and help improve the assembly efficiency of the electromagnetic heating device.

[0048] Of course, it is understandable that in other embodiments, a notch matching the anti-radiation ring 21 may be provided on the top of the first heat sink 321, and the notch forms the avoidance space 33. When the anti-radiation ring 21 is fixedly connected to the electromagnetic coil disk 2, the portion of the anti-radiation ring 21 in which the insulating sleeve 212 is sleeved is embedded in the notch, thereby avoiding direct contact between the anti-radiation ring 21 and the radiator 3, and preventing the insulating sleeve 212 and the first heat sink 321 from being worn due to long-term contact.

[0049] Embodiment three:

[0050] The main difference between this embodiment and embodiment one is that the insulating sleeve 212 described in this embodiment is an elastomer. After the insulating sleeve 212 is sleeved on the anti-radiation ring 21, the insulating sleeve 212 has an interference fit with the anti-radiation ring 21 due to the elasticity of the insulating sleeve 212 itself, thereby realizing the positioning of the insulating sleeve 212. The interference fit between the insulating sleeve and the anti-radiation ring 21 can improve the positioning stability of the insulating sleeve 212 and reduce the possibility of positional displacement of the insulating sleeve 212, thereby ensuring that the insulating sleeve 212 separates the anti-radiation ring 21 and the heat sink 32, so that the anti-radiation ring 21 and the heat sink 32 remain insulated.

[0051] Of course, it is understandable that in other embodiments, the insulating sleeve 212 may also be provided with an elastic portion, and the elastic portion forms an interference fit with the anti-radiation ring 21 to achieve the positioning of the insulating sleeve 212.

[0052] Of course, it is understandable that in other embodiments, the friction force between the insulating sleeve 212 and the anti-radiation ring 21 is used to prevent the relative sliding of the insulating sleeve 212 and the anti-radiation ring 21, thereby achieving the positioning of the insulating sleeve 212. It should be noted that since the anti-radiation ring 21 is annular as a whole, the curvature of the anti-radiation ring 21 itself will cause the insulating sleeve 212 to bend as a whole. When the inner diameter of the insulating sleeve 212 is close to the outer diameter of the anti-radiation ring 21, the contact area between the insulating sleeve 212 and the anti-radiation ring 21 will be increased, thereby increasing the resistance between the insulating sleeve 212 and the anti-radiation ring 21. The resistance can prevent the relative sliding of the insulating sleeve 212 and the anti-radiation ring 21, thereby achieving the positioning of the insulating sleeve 212.

[0053] It should also be noted that in the above embodiment, the insulating sleeve 212 may also have heat shrinkage properties. The insulating sleeve 212 achieves initial positioning of the insulating sleeve 212 through interference fit with the anti-radiation ring 21 or through resistance between the insulating sleeve 21 and the anti-radiation ring 21. When the electromagnetic heating device is started, the electromagnetic coil disk 2 and the main control board 5 will generate heat. At this time, the insulating sleeve 212 will gradually shrink after being heated, so as to fit tightly to the surface of the anti-radiation ring 21 to achieve further fixation of the insulating sleeve 212 and the anti-radiation ring 21. By using the electromagnetic heating device to heat the insulating sleeve 212, the insulating sleeve 212 can be automatically fixed, reducing the steps of manual heating, and can effectively improve the assembly efficiency of the electromagnetic heating device.

[0054] Embodiment 4:

[0055] The main difference between this embodiment and embodiment one is that in this embodiment, there is no need to set a positioning protrusion 211 on the anti-radiation ring 21, and the insulating sleeve 212 is a heat shrinkable sleeve. When the insulating sleeve 212 is put on the anti-radiation ring 21, the insulating sleeve 212 is shrunk by heating and fits tightly to the surface of the anti-radiation ring 21, thereby realizing the positioning of the insulating sleeve 212.

[0056] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. An electromagnetic heating device, comprising a base, an electromagnetic coil disk and a main control board are arranged in the base, an anti-radiation ring is arranged around the outer periphery of the electromagnetic coil disk, and a radiator is installed on the main control board, characterized in that: An insulating sleeve is sleeved on the anti-radiation ring. The insulating sleeve is positioned on the anti-radiation ring and partly located between the radiator and the anti-radiation ring. The anti-radiation ring and the radiator are insulated by the insulating sleeve.

2. An electromagnetic heating device according to claim 1, characterized in that: At least part of the insulating sleeve is interference fit with the anti-radial ring to achieve the positioning of the insulating sleeve; or, there is resistance between the insulating sleeve and the anti-radial ring to limit the relative sliding of the insulating sleeve and the anti-radial ring.

3. The electromagnetic heating device according to claim 1, characterized in that: The anti-radiation ring is provided with a positioning protrusion, and the insulating sleeve is positioned on the anti-radiation ring through the positioning protrusion.

4. An electromagnetic heating device according to claim 2 or 3, characterized in that: The insulating sleeve is a heat shrinkable sleeve, and the heat generated by the electromagnetic heating device shrinks the insulating sleeve and makes it closely adhere to the surface of the anti-radiation ring.

5. The electromagnetic heating device according to claim 3, characterized in that: The anti-radio ring has a first end and a second end, which are fixedly connected to each other and form the positioning protrusion, so that the anti-radio ring is annularly arranged around the outer peripheral side of the electromagnetic coil disk.

6. The electromagnetic heating device according to claim 3, characterized in that: The outer circumference of the electromagnetic coil disk is provided with a plurality of slots for installing the anti-radiation ring, one of which is close to the radiator, and the positioning protrusion is embedded in the slot so that part of the insulating sleeve is located between the radiator and the anti-radiation ring.

7. The electromagnetic heating device according to claim 1, characterized in that: The insulating sleeve is a heat shrinkable sleeve. After being heated, the insulating sleeve shrinks and adheres closely to the surface of the anti-radial ring to achieve the positioning of the insulating sleeve.

8. The electromagnetic heating device according to claim 1, characterized in that: The anti-radiation ring has a first end and a second end. A plurality of slots are arranged on the outer peripheral side of the electromagnetic coil disk. The first end and the second end are embedded in the same slot so that the first end and the second end are butted against each other.

9. The electromagnetic heating device according to claim 1, characterized in that: The radiator includes a fixing seat and a plurality of radiating fins, which are distributed on the fixing seat at intervals. The radiating fins include a first radiating fin and a second radiating fin. The first radiating fin is located at one end of the fixing seat close to the electromagnetic coil disk. The first radiating fin is provided with an avoidance space for avoiding the anti-radiation ring.

10. An electromagnetic heating device according to claim 9, characterized in that: A notch matching the anti-radiation ring is provided at the top of the first heat sink, and the notch forms the avoidance space; or, the height of the first heat sink is less than the height of the second heat sink, the first heat sink is located at the lower side of the anti-radiation ring, and an avoidance space is formed on the upper side of the first heat sink, and the height of the first heat sink gradually decreases as the first heat sink approaches the electromagnetic coil disk; or, the height of the first heat sink remains equal.

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