Electromagnetic oven with external radiator

Abstract

The utility model belongs to the technical field of household appliances, and discloses an induction cooker with an external radiator, the induction cooker comprises an upper cover, a bottom shell, a heating coil, a main control circuit board and a radiator, the main control circuit board is provided with a power device; the bottom of the bottom shell is partially recessed to form a cavity protruding out of the lower surface of the bottom shell, and the main control circuit board is arranged in the cavity; the heating coil is arranged between the upper cover and the main body part of the bottom shell, and the main body part refers to the part, except the concave cavity, of the bottom shell; the power device is in heat conduction connection with the radiator, and at least part of the radiator is exposed out of the bottom shell; the radiator is arranged on the vertical side wall of the concave cavity, and the radiator does not protrude out of the edge of the bottom shell; the LED lamp has the advantages of being simple in structure, good in heat dissipation effect, capable of preventing insects from entering, reducing noise and beneficial to light and thin design.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and more particularly, to an induction cooker with an external radiator. Background Art

[0002] Induction cookers, also known as electromagnetic cooktops, are widely used in modern kitchens due to their high efficiency, safety, and cleanliness. The structure of a traditional induction cooker mainly includes an upper cover (composed of a panel and a cover plate), a bottom case, a heating coil, a cooling fan, a main control circuit board, and a control circuit board. These components are arranged in an inner cavity surrounded by the upper cover and the bottom case. Among them, power devices (such as MOS transistors, IGBT transistors, etc.) on the main control circuit board are used to control the heating power of the heating coil, but a large amount of heat is generated during operation. To maintain the inner cavity temperature within the normal range and ensure the normal operation of each component, the traditional design uses a cooling fan to dissipate heat to the external environment.

[0003] However, this traditional heat dissipation method has several obvious defects. First, the cooling fan requires large ventilation holes, which provides a passage for insects (such as cockroaches, flies, etc.) to enter the inner cavity of the induction cooker, possibly causing damage to the internal circuit. Second, the cooling fan occupies a large space, which is not conducive to the thin and light design of the induction cooker. In addition, the noise generated by the cooling fan during operation will reduce the user experience.

[0004] To solve these problems, some induction cookers adopt a fanless design. Such induction cookers usually rely on the metal bottom case to dissipate internal heat to the outside. However, this design also brings new problems. Using aluminum or other metal materials to replace the traditional plastic bottom case will lead to an increase in the overall cost and weight of the induction cooker. At the same time, to maintain aesthetics, the outer surface of the metal bottom case usually needs to be painted, but the paint layer will affect the heat dissipation effect, resulting in an unsatisfactory heat dissipation effect.

[0005] The defects of these existing technologies highlight the importance and complexity of the heat dissipation design of induction cookers. An ideal heat dissipation solution should be able to effectively dissipate heat, while not affecting the thin and light design of the induction cooker, not increasing too much cost, and being able to maintain aesthetics. In addition, consideration should also be given to how to prevent insects from entering the interior and how to reduce noise to improve the user experience.

[0006] In view of the above problems, the existing technologies urgently need to be improved. Utility Model Content

[0007] The purpose of the present application is to provide an induction cooker with an external radiator, which has the advantages of simple structure, good heat dissipation effect, preventing insects from entering, reducing noise, and being conducive to thin and light design.

[0008] The present application provides an induction cooker with an external radiator, which includes an upper cover, a bottom case, a heating coil, a main control circuit board and a radiator. A power device is arranged on the main control circuit board; a part of the bottom of the bottom case is recessed downward to form a concave cavity protruding from the lower surface of the bottom case, and the main control circuit board is arranged in the concave cavity; the heating coil is arranged between the upper cover and the main body part of the bottom case, and the main body part refers to the part of the bottom case other than the concave cavity; the power device is thermally connected to the radiator, and at least part of the radiator protrudes outside the bottom case;

[0009] The radiator is arranged on the vertical side wall of the concave cavity, and the radiator does not protrude beyond the edge of the bottom case.

[0010] By arranging the radiator externally, the heat dissipation problem of traditional induction cookers is effectively solved, and at the same time, the disadvantages of using a cooling fan and a metal bottom case are avoided; a concave cavity is formed by locally recessing the bottom of the bottom case for installing the main control circuit board and the radiator, enabling other parts of the induction cooker to adopt a thinning design; this induction cooker has the advantages of simple structure, good heat dissipation effect, preventing insects from entering, reducing noise, and being conducive to a thin and light design. In addition, by arranging the radiator on the vertical side wall of the concave cavity, the radiator is exposed to a more open space, and the air near the radiator can flow more smoothly. This design can not only effectively dissipate heat but also does not increase the overall thickness of the induction cooker. The radiator not protruding beyond the edge of the bottom case can better hide the radiator, being more beautiful on the one hand and reducing the risk of the radiator being contaminated on the other hand.

[0011] Preferably, a rectifier is arranged on the main control circuit board, and the rectifier is thermally connected to the radiator.

[0012] The rectifier is an important electronic component in the induction cooker and generates heat during operation. Arranging the rectifier on the main control circuit board can centrally manage circuit components and simplify the circuit layout. By thermally connecting the rectifier to the radiator, the heat generated by the rectifier can be effectively transferred to the radiator. This connection method ensures rapid heat conduction and prevents the rectifier from overheating.

[0013] Preferably, an insulating heat-conducting layer is arranged between the device on the main control circuit board that is thermally connected to the radiator and the radiator.

[0014] The external radiator design allows heat to be directly conducted from the inside of the induction cooker to the external environment, improving the heat dissipation efficiency. The addition of the insulating heat-conducting layer solves the possible electrical safety hazards between the radiator and the devices on the main control circuit board. These two features cooperate with each other to ensure both the heat dissipation effect and the safety of the induction cooker.

[0015] Preferably, a plurality of heat dissipation holes are formed at the position of the bottom of the bottom case directly opposite to the heating coil.

[0016] Preferably, the concave cavity is arranged at the edge of the bottom of the bottom shell, and the radiator is arranged in a direction away from the middle of the bottom of the bottom shell.

[0017] Preferably, a control circuit board is further arranged between the upper cover and the bottom shell, and the control circuit board and the concave cavity are respectively located on opposite sides of the heating coil;

[0018] The radiator is arranged on the vertical side wall of the concave cavity facing away from the control circuit board.

[0019] Preferably, a part of the vertical side wall of the concave cavity is recessed inward to form a groove, and the radiator is arranged in the groove;

[0020] The width of the groove gradually increases in a direction away from the concave cavity.

[0021] Preferably, the material of the bottom shell is plastic.

[0022] Preferably, the main body thickness of the electromagnetic cooker with an external radiator is 10 mm - 15 mm, and the overall thickness is 30 mm - 35 mm; the main body thickness refers to the distance between the upper surface of the upper cover and the lower surface of the main body part of the bottom shell; the overall thickness refers to the distance between the upper surface of the upper cover and the lower surface of the concave cavity.

[0023] Beneficial effects: For the electromagnetic cooker with an external radiator provided in this application, the radiator is externally arranged, effectively solving the heat dissipation problem of traditional electromagnetic cookers, and at the same time avoiding the disadvantages of using a cooling fan and a metal bottom shell; a concave cavity is formed by partially recessing the bottom of the bottom shell for installing the main control circuit board and the radiator, enabling other parts of the electromagnetic cooker to adopt a thinning design; this electromagnetic cooker has the advantages of simple structure, good heat dissipation effect, preventing insects from entering, reducing noise, and being conducive to a thin and light design; in addition, the radiator is arranged on the vertical side wall of the concave cavity, exposing the radiator to a more open space, enabling the air near the radiator to flow more smoothly, and this design can not only effectively dissipate heat but also not increase the overall thickness of the electromagnetic cooker. The radiator does not protrude beyond the edge of the bottom shell, which can better hide the radiator, making it more beautiful on the one hand and reducing the risk of the radiator being contaminated on the other hand. Description of the Drawings

[0024] Figure 1 It is an exploded view of the electromagnetic cooker with an external radiator provided by an embodiment of this application.

[0025] Figure 2 It is a bottom view of the electromagnetic cooker with an external radiator provided by an embodiment of this application.

[0026] Figure 3 It is an internal structure diagram of the electromagnetic cooker with an external radiator provided by an embodiment of this application.

[0027] Figure 4 It is a connection structure diagram of the main control circuit board and the radiator.

[0028] Figure 5 It is a three-dimensional view of the bottom case.

[0029] Label description: 1. Upper cover; 2. Bottom case; 201. Concave cavity; 202. Main body part; 203. Heat dissipation holes; 204. Grooves; 205. Through holes; 206. Support feet; 3. Heating coil; 4. Main control circuit board; 401. Power device; 402. Rectifier; 5. Radiator; 6. Control circuit board. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] As a cooking device widely used in modern kitchens, the induction cooker has the characteristics of high efficiency, safety and cleanliness. The structure of a traditional induction cooker mainly includes an upper cover, a bottom case, a heating coil, a cooling fan, a main control circuit board and a control circuit board. These components are arranged in the inner cavity surrounded by the upper cover and the bottom case. The power devices on the main control circuit board will generate a large amount of heat during operation. Usually, the cooling fan is relied on to dissipate the heat to the external environment to maintain the temperature in the inner cavity within a suitable range and ensure the normal operation of each component.

[0033] However, there are several key problems with this traditional design. First, the cooling fan requires large ventilation holes, which increases the risk of insects entering the inner cavity and may cause damage to the internal circuit. Second, the cooling fan occupies a large space, which is not conducive to the thin and light design of the induction cooker. In addition, the cooling fan generates noise during operation, affecting the user experience. To solve these problems, some induction cookers adopt a fanless design and rely on the metal bottom shell for heat dissipation. However, this solution brings new problems, such as increased cost, increased weight, and the impact of the bottom shell painting on the heat dissipation effect.

[0034] If these technical problems cannot be effectively solved, it will have a serious impact on the performance, user experience, and market competitiveness of the induction cooker. Therefore, there is an urgent need for an innovative technical solution to simultaneously address challenges in multiple aspects such as heat dissipation effect, thin and light design, and noise control.

[0035] For this purpose, referring to Figures 1-5 , this application provides an induction cooker with an external radiator, including an upper cover 1, a bottom shell 2, a heating coil 3, a main control circuit board 4, and a radiator 5. A power device 401 is arranged on the main control circuit board 4; a local depression is formed at the bottom of the bottom shell 2 to form a concave cavity 201 protruding from the lower surface of the bottom shell 2, and the main control circuit board 4 is arranged in the concave cavity 201; the heating coil 3 is arranged between the upper cover 1 and the main body part 202 of the bottom shell 2, and the main body part 202 refers to the part of the bottom shell 2 other than the concave cavity 201; the power device 401 is thermally connected to the radiator 5, and at least part of the radiator 5 is exposed outside the bottom shell 2;

[0036] The radiator 5 is arranged on the vertical side wall of the concave cavity 201, and the radiator 5 does not protrude beyond the edge of the bottom shell 2.

[0037] Placing the radiator outside effectively solves the heat dissipation problem of traditional induction cookers, while avoiding the disadvantages of using a cooling fan and a metal bottom shell; a local depression is formed at the bottom of the bottom shell 2 to form a concave cavity 201 for installing the main control circuit board 4 and the radiator 5, enabling other parts of the induction cooker to adopt a thinning design; this induction cooker has the advantages of simple structure, good heat dissipation effect, preventing insects from entering, reducing noise, and being conducive to thin and light design. In addition, if the radiator 5 is arranged at the bottom of the concave cavity 201, on the one hand, it will increase the overall thickness of the induction cooker, and on the other hand, due to the small gap between the bottom of the concave cavity 201 and the tabletop (the induction cooker is usually placed on the tabletop during use), it is not conducive to air flow, thus affecting the heat dissipation effect. Here, placing the radiator 5 on the vertical side wall of the concave cavity 201 exposes the radiator 5 to a more open space, and the air near the radiator 5 can flow more smoothly. This design can effectively dissipate heat without increasing the overall thickness of the induction cooker. The radiator 5 not protruding beyond the edge of the bottom shell 2 can better hide the radiator 5, being more aesthetically pleasing on the one hand and reducing the risk of the radiator 5 being contaminated (such as being contaminated by liquid overflowing from the cookware during the use of the induction cooker) on the other hand.

[0038] Among them, the radiator 5 refers to a device for dissipating heat, and specifically, it can be implemented by an aluminum heat sink or heat fins. For example Figure 4 in [a certain context], the radiator 5 includes a base and a plurality of fins disposed on the base. The base is thermally connected to the power device 401, and the fins protrude outside the bottom case 2; among them, the base can also protrude outside the bottom case 2; the base and the fins can be made of aluminum, copper or other metals.

[0039] Among them, the power device 401 refers to an electronic component for controlling the heating power of the heating coil 3, usually a switching tube, and specifically, it can be implemented by a MOS tube or an IGBT tube.

[0040] Among them, the thermal connection refers to a connection method through which heat can be effectively transferred, and specifically, it can be implemented by using thermal grease, thermal adhesive or thermal gasket.

[0041] In some embodiments, see Figure 3 、 Figure 4 , a rectifier 402 is provided on the main control circuit board 4, and the rectifier 402 is thermally connected to the radiator 5 (for example, thermally connected to the base of the radiator 5).

[0042] The rectifier 402 is an important electronic component in the induction cooker and will generate heat during operation. Arranging the rectifier 402 on the main control circuit board 4 can centrally manage circuit components and simplify the circuit layout. By thermally connecting the rectifier 402 to the radiator 5, the heat generated by the rectifier 402 can be effectively transferred to the radiator 5. This connection method ensures rapid heat conduction and prevents the rectifier 402 from overheating.

[0043] Specifically, the thermal connection between the rectifier 402 and the radiator 5 can be achieved in various ways. For example, thermal materials such as thermal grease, thermal adhesive or thermal gasket can be used to closely fit the rectifier 402 and the radiator 5.

[0044] In some preferred embodiments, an insulating thermal layer is provided between the devices (such as the power device 401 and the rectifier 402) on the main control circuit board 4 that are thermally connected to the radiator 5 and the radiator 5.

[0045] The external design of the radiator 5 allows heat to be directly conducted from the inside of the induction cooker to the external environment, improving the heat dissipation efficiency. The addition of the insulating thermal layer solves the potential electrical safety hazards that may exist between the radiator 5 and the devices on the main control circuit board 4. These two features cooperate with each other to ensure both the heat dissipation effect and the safety of the induction cooker.

[0046] The insulating and heat-conducting layer can be realized by using a variety of materials, such as ceramics, alumina, aluminum nitride and other materials with good heat conductivity and insulation. The thickness of the insulating and heat-conducting layer can be adjusted according to actual requirements. The insulating and heat-conducting layer can be connected to the radiator 5 and the device by means of coating, attaching or embedding, etc.

[0047] Preferably, see Figure 2 , Figure 5 , a plurality of heat dissipation holes 203 are provided at the position of the bottom of the bottom case 2 directly opposite to the heating coil 3.

[0048] During the operation of the heating coil 3, certain heat will be generated, and these heats can be directly dissipated to the outside through the heat dissipation holes 203. This design has a positive cooperative effect with the scheme of the external radiator 5. The external radiator 5 is mainly used to dissipate the heat generated by the power device 401 and other electronic components, while the heat dissipation holes 203 at the bottom are mainly used to dissipate the heat generated by the heating coil 3. These two heat dissipation methods complement each other and jointly improve the heat dissipation effect of the entire induction cooker. Especially in the high-power working state, the heat dissipation holes 203 at the bottom can effectively prevent the temperature near the heating coil 3 from being too high, improving the safety and reliability of the induction cooker.

[0049] The heat dissipation holes 203 can be circular, square, oval or other geometric shapes. The number of the heat dissipation holes 203 can be adjusted according to actual requirements and can range from several to dozens. The size of the heat dissipation holes 203 can also be designed as needed. Considering the need for insect prevention, it can be designed to be between 1 mm and 5 mm. The arrangement of the heat dissipation holes 203 can be evenly distributed or radially distributed, or can be specifically arranged according to the heat distribution characteristics.

[0050] Among them, the radiator 5 can be connected to the vertical side wall of the concave cavity 201 by means of screw connection, snap connection or bonding, etc. to realize the fixation of the radiator 5. The size of the radiator 5 can be set according to actual needs.

[0051] Optionally, the concave cavity 201 can be arranged at the edge of the bottom of the bottom case 2, and the radiator 5 can be arranged in a direction away from the middle of the bottom of the bottom case 2.

[0052] This arrangement method can effectively utilize the edge space of the induction cooker without affecting the main structure of the induction cooker. Arranging the radiator 5 in a direction away from the middle of the bottom of the bottom case 2 can avoid heat interference between the radiator 5 and the core components of the induction cooker (such as the heating coil 3), and at the same time expose the radiator 5 to a more open space, facilitating the heat exchange between the radiator 5 and the outside air.

[0053] Specifically, the concave cavity 201 can be disposed at any edge of the bottom of the bottom case 2, for example, at the front edge, rear edge or side edge of the bottom of the bottom case 2. The radiator 5 can extend outward along the vertical sidewall of the concave cavity 201, and the extension direction can be horizontal, inclined upward or inclined downward, as long as the radiator 5 can be disposed in a direction away from the middle of the bottom of the bottom case 2.

[0054] For example, in some possible implementations, see Figure 3 A control circuit board 6 is further disposed between the upper cover 1 and the bottom shell 2. The control circuit board 6 and the concave cavity 201 are respectively located on two opposite sides of the heating coil 3 (generally, the side where the control circuit board 6 is located is called the front side, and the side opposite thereto is called the rear side, that is, the control circuit board 6 is disposed on the front side of the heating coil 3, and the concave cavity 201 is disposed on the rear side of the heating coil 3);

[0055] The heat sink 5 is disposed on a vertical side wall of the cavity 201 facing away from the control circuit board 6 .

[0056] The control circuit board 6 is used to control the induction cooker. The control circuit board 6 may be provided with a user interaction interface such as a display screen and touch buttons to facilitate user operation.

[0057] When the induction cooker is in use, the side where the control circuit board 6 is located will be close to the user, so that the side where the radiator 5 is located will be away from the user. This layout prevents the user from touching the radiator 5 and getting burned. On the other hand, the radiator 5 is better hidden, which improves the aesthetics of the induction cooker. At the same time, the radiator 5 is located at the rear of the induction cooker, which is conducive to heat exchange with the outside air, further improving the heat dissipation efficiency.

[0058] Further, see Figure 2 The vertical side wall of the cavity 201 is partially concave to form a groove 204, and the radiator 5 is arranged in the groove 204. Thereby, the radiator 5 is better hidden, and the overall aesthetics of the induction cooker is improved.

[0059] Furthermore, the groove 204 can be designed to have a width that gradually increases in a direction away from the cavity 201. This width gradient design increases the heat dissipation area and improves the heat dissipation efficiency, thereby ensuring the heat dissipation effect without affecting the appearance of the induction cooker.

[0060] Specifically, the groove 204 can be in various shapes, such as rectangular, semicircular or trapezoidal, etc., to accommodate heat sinks 5 of different shapes. The depth of the groove 204 can be adjusted according to the size of the heat sink 5 to ensure that the heat sink 5 is completely embedded in the groove 204.

[0061] Furthermore, a through hole 205 (such as a through hole 205) adapted to the heat sink 5 can be provided on the vertical side wall of the cavity 201. Figure 5As shown in the figure, one side of the radiator 5 is thermally connected to the power device 401 (and the rectifier 402), and the other side extends from the through-hole 205 to the outside of the bottom case 2 (such as in the groove 204). Among them, the gap between the through-hole 205 and the radiator 5 can be sealed with a sealing ring, sealant or other sealing structures.

[0062] Among them, the material of the bottom case 2 is preferably plastic. Compared with metal, the plastic bottom case 2 can significantly reduce the overall cost of the induction cooker; it can reduce the overall weight of the induction cooker and improve the portability of the product; it has good insulation performance and can improve the safety of the induction cooker. Since the radiator 5 is external, the bottom case 2 no longer bears the main heat dissipation function, so using plastic material will not affect the heat dissipation effect.

[0063] There are various implementation methods for selecting the material of the bottom case 2 as plastic. For example, thermoplastic plastics such as polypropylene (PP), polyethylene (PE) or ABS resin can be selected; thermosetting plastics such as phenolic resin and epoxy resin can also be selected. These materials all have good insulation, heat resistance and formability. Preferably, modified ABS material is used, and some fillers with good thermal conductivity (such as alumina, bismuth oxide, aluminum nitride, boron nitride, silicon carbide, etc.) are added to the ABS material to increase the heat dissipation ability of the ABS material.

[0064] Among them, the specific size of the induction cooker can be set according to actual needs. For example, the main body thickness is 10mm - 15mm, and the overall thickness is 30mm - 35mm; the main body thickness refers to the distance between the upper surface of the upper cover 1 and the lower surface of the main body part 202 of the bottom case 2; the overall thickness refers to the distance between the upper surface of the upper cover 1 and the lower surface of the cavity 201. Controlling the main body thickness of the induction cooker within the range of 10mm - 15mm, while the local position thickness is within the range of 30mm - 35mm, provides sufficient installation space for the main control circuit board 4 and the radiator 5 on the basis of the thin and light design of the main body. It not only ensures the thin and light of the induction cooker, but also takes into account the structural strength, equipment installation and heat dissipation requirements.

[0065] Furthermore, feet 206 can be provided at the bottom of the main body part 202 of the bottom case 2 (as Figure 2 shown) to support the main body part 202 and ensure a gap between the lower surface of the main body part 202 and the tabletop, so as to facilitate the heat dissipation of the heating coil 3.

[0066] In summary, the induction cooker with an external radiator of the present application has at least the following advantages:

[0067] 1. The cooling fan is cancelled, but the induction cooker can still work normally under high power.

[0068] 2. The radiator 5 is externally placed and not inside the induction cooker cavity. The heat of the radiator 5 can be dissipated through external air convection, and its heat will hardly affect various electronic components inside the induction cooker cavity.

[0069] 3. The entire induction cooker body is designed with a thin and light structure. There are heat dissipation holes 203 at the position of the bottom shell 2 where the heating coil 3 is located, which is convenient for the heat dissipation of the heating coil 3 during operation.

[0070] 4. The entire bottom shell 2 is made of plastic, with light weight, good insulation performance and low cost.

[0071] In this document, relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0072] The above are only embodiments of the present application and are not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An induction cooker with an external radiator, comprising an upper cover (1), a bottom shell (2), a heating coil (3), a main control circuit board (4) and a radiator (5), wherein a power device (401) is arranged on the main control circuit board (4); characterized in that: The bottom of the bottom shell (2) is partially concave to form a cavity (201) protruding from the lower surface of the bottom shell (2), and the main control circuit board (4) is arranged in the cavity (201); the heating coil (3) is arranged between the upper cover (1) and the main body (202) of the bottom shell (2), and the main body (202) refers to the part of the bottom shell (2) other than the cavity (201); the power device (401) is thermally connected to the heat sink (5), and the heat sink (5) is at least partially exposed outside the bottom shell (2); The heat sink (5) is arranged on the vertical side wall of the concave cavity (201), and the heat sink (5) does not protrude from the edge of the bottom shell (2).

2. The induction cooker with an external radiator according to claim 1, characterized in that: A rectifier (402) is provided on the main control circuit board (4), and the rectifier (402) is thermally connected to the heat sink (5).

3. The induction cooker with an external radiator according to claim 1 or 2, characterized in that: An insulating heat-conducting layer is provided between the device on the main control circuit board (4) that is heat-conductively connected to the heat sink (5) and the heat sink (5).

4. The induction cooker with an external radiator according to claim 1, characterized in that: A plurality of heat dissipation holes (203) are provided at the bottom of the bottom shell (2) directly facing the heating coil (3).

5. The induction cooker with an external radiator according to claim 1, characterized in that: The concave cavity (201) is arranged at the edge of the bottom of the bottom shell (2), and the heat sink (5) is arranged in a direction away from the middle of the bottom of the bottom shell (2).

6. The induction cooker with an external radiator according to claim 5, characterized in that: A control circuit board (6) is further provided between the upper cover (1) and the bottom shell (2), and the control circuit board (6) and the concave cavity (201) are respectively located on two opposite sides of the heating coil (3); The heat sink (5) is arranged on a vertical side wall of the cavity (201) facing away from the control circuit board (6).

7. The induction cooker with an external radiator according to claim 5, characterized in that: The vertical side wall of the cavity (201) is partially concave to form a groove (204), and the heat sink (5) is arranged in the groove (204); The width of the groove (204) gradually increases in a direction away from the cavity (201).

8. The induction cooker with an external radiator according to claim 1, characterized in that: The material of the bottom shell (2) is plastic.

9. The induction cooker with an external radiator according to claim 1, characterized in that: The main body thickness of the induction cooker with an external radiator is 10 mm-15 mm, and the overall thickness is 30 mm-35 mm; the main body thickness refers to the distance between the upper surface of the upper cover (1) and the lower surface of the main body part (202) of the bottom shell (2); the overall thickness refers to the distance between the upper surface of the upper cover (1) and the lower surface of the concave cavity (201).

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