Multi-head electromagnetic cooker

Abstract

This utility model relates to a multi-burner induction cooker, comprising a housing and several heating components disposed inside the housing; the housing has a base plate for supporting the heating components, the base plate being made of metal; each heating component includes a coil and a circuit board assembly disposed between the coil and the base plate; an isolator is provided between the circuit board assembly and the base plate to block the magnetic field conduction path. This multi-burner induction cooker can effectively solve the problem of magnetic field interference when several coils are working simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic cooker technology, and in particular to a multi-burner electromagnetic cooker. Background Technology

[0002] A multi-burner induction cooker is a kitchen appliance that heats food using the principle of electromagnetic induction. Its core feature is that it has several independent heating zones.

[0003] In related technologies, multi-burner induction cooktops are equipped with a heating element at each burner. However, when different burners are working simultaneously, the heating elements are prone to interference, resulting in inaccurate heating power. Utility Model Content

[0004] The technical problem this invention aims to solve is that the circuit board assemblies of different burners in a multi-burner induction cooker are prone to mutual interference when operating simultaneously. Based on this, an improved multi-burner induction cooker is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a multi-head induction cooker is constructed, including a shell and a plurality of heating components disposed inside the shell; the shell is provided with a base plate for supporting the heating components, the base plate is made of metal, each heating component includes a coil and a circuit board assembly disposed between the coil and the base plate; an isolator is provided between the circuit board assembly and the base plate to block the magnetic field conduction path.

[0006] In some embodiments, the isolator is a sheet-like isolator that is parallel to the base plate and the circuit board of the circuit board assembly.

[0007] In some embodiments, the spacer is an aluminum sheet with a thickness greater than or equal to 0.3 mm and less than or equal to 1.5 mm.

[0008] In some embodiments, the size of the isolator is configured to be greater than or equal to the projected size of the circuit board assembly on the base plate.

[0009] In some embodiments, the horizontal distance between the circuit board assembly and the isolator on the same side of the edge is at least greater than 5 mm.

[0010] In some embodiments, the size of the isolator is configured to be greater than or equal to the projected size of the entire assembly of the coil and the circuit board assembly on the base plate.

[0011] In some embodiments, the horizontal distance between the integral of the coil and the circuit board assembly and the edge of the isolator located on the same side is at least greater than 5 mm.

[0012] In some embodiments, the housing is further provided with a storage box for accommodating the circuit board assembly, the storage box being made of an insulating material;

[0013] The isolation element is disposed on the inside of the storage box, or the isolation element is disposed on the outside of the storage box.

[0014] In some embodiments, the separator is a sheet-like separator disposed on the outside of the storage box and attached to the bottom plate; the storage box presses the separator onto the bottom plate.

[0015] In some embodiments, a connecting component is provided between the storage box and the base plate for fixing the storage box to the base plate;

[0016] The connecting component is located on the inner side of the edge of the isolator, and the isolator is provided with a clearance hole for avoiding the connecting component.

[0017] The present invention offers the following advantages: By installing an insulating component between the metal base plate and the circuit board assembly, this multi-burner induction cooker effectively solves the problem of magnetic field interference when multiple coils are operating simultaneously. Specifically, when multiple coils are running synchronously, if the alternating magnetic field they generate is conducted to other circuit board assemblies through the metal base plate, it will be blocked by the insulating component, preventing interference to the multiple operating circuit board assemblies and thus ensuring stable and reliable heating performance when multiple burners are working simultaneously. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the external structure of the multi-burner induction cooker of this utility model in some embodiments;

[0020] Figure 2 This is a schematic diagram of the internal structure of the multi-burner induction cooker of this utility model in some embodiments; the panel of the multi-burner induction cooker is omitted in the figure, and one of the coils is omitted in order to observe the circuit board assembly more clearly;

[0021] Figure 3 This is a longitudinal cross-sectional view of the multi-burner induction cooker of this utility model at a first angle in some embodiments; wherein the multi-burner induction cooker is longitudinally cut twice, and the two cutting lines are parallel to the length direction and width direction of the multi-burner induction cooker, respectively.

[0022] Figure 4 This is a longitudinal cross-sectional view of the multi-burner induction cooker of this utility model at a second angle in some embodiments; wherein the cutting line is parallel to the width direction of the multi-burner induction cooker, and the panel of the multi-burner induction cooker is omitted in the figure.

[0023] Reference numerals: Multi-burner induction cooker 100; Housing 1; Base plate 11; Side plate 12; Panel 2; Heating component 3; Coil 31; Circuit board assembly 32; Isolator 4; Clearance hole 41; Storage box 5; Connecting component 6; Hook part 61. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0025] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0027] Please refer to Figure 1 and Figure 2This utility model discloses a multi-burner induction cooker 100, which mainly includes a housing 1, a panel 2, and several heating elements 3. The housing 1 serves to support and protect the internal components (i.e., the parts housed inside the housing 1, such as the heating elements 3), and defines a top-open chamber. After the panel 2 is installed on the top of the housing 1, it forms a relatively sealed space, providing protection for the internal components. The panel 2 serves as the support surface for cookware, and several burners can be arranged at intervals on the panel 2, where cookware can be placed. Several heating elements 3 are arranged one-to-one with the burners, and each heating element 3 is located below the burner for electromagnetic induction heating.

[0028] Understandably, the heating element 3 can convert mains power into high-frequency alternating current and generate an alternating magnetic field. When an iron-containing cookware is placed on the burner, the magnetic field passes through the cookware, generating eddy currents at the bottom of the cookware, causing the cookware itself to heat up, thereby heating the food. The multi-burner induction cooker 100 can have 2, 3, 4, or even more burners, each of which can have its power and temperature independently controlled.

[0029] like Figure 2 As shown, the housing 1 may include a metal base plate 11 and several side plates 12 surrounding the perimeter of the base plate 11 to define the aforementioned chamber. The housing 1 may be integrally formed from metal material or may be welded from multiple metal plates, depending on the specific process required.

[0030] Based on the distribution of the burners, the chamber can be divided into several installation areas, each corresponding to a heating element 3. Each heating element 3 may include a coil 31 and a circuit board assembly 32 electrically connected to the coil 31. (See reference...) Figure 3 The coil 31 is located below the panel 2 and above the circuit board assembly 32. The circuit board assembly 32 is vertically positioned between the coil 31 and the base plate 11 of the housing 1. The circuit board assembly 32 may include a high-frequency conversion module that converts mains power into high-frequency alternating current to drive the coil 31 to generate an alternating magnetic field. Furthermore, the circuit board assembly 32 may also include circuit modules such as a rectifier module; details can be found in related technologies and will not be elaborated here.

[0031] Furthermore, the multi-burner induction cooker 100 may also include an operation panel 2 and a control module connected to the operation panel 2. The control module can receive commands input by the user on the operation panel 2 (such as adjusting power) and send control signals (such as adjusting output frequency or changing heating power) to at least one high-frequency conversion module. For example, each burner can be surrounded by an operation panel 2 to support independent operation of single burner start / stop, with no interference between burner operations. The operation panel 2 can be touch-sensitive or rotary, and is not limited here. Several control modules can be provided, each correspondingly set in a circuit board assembly 32. Any control module is connected to the operation panel 2 and high-frequency conversion module of the same burner. Alternatively, a single control module can be provided, independent of the operation panel 2 and circuit board assembly 32, with several operation panels 2 and several circuit board assemblies 32 connected to the control module respectively. It should be noted that the specific number and arrangement of the operation panels 2 and control modules can be adjusted according to actual needs. As long as at least one operation panel 2 and at least one control module are included, they should be included within the scope of protection of this utility model patent.

[0032] To ensure stable equipment operation, please refer to the following: Figure 2 and Figure 3 An isolator 4 is provided between the circuit board assembly 32 and the base plate 11 of the housing 1. This isolator prevents interference between the corresponding circuit board assemblies 32 when multiple coils 31 are working simultaneously. Understandably, since the base plate 11 is made of metal, the magnetic field generated by multiple coils 31 can be conducted through the base plate 11 when they are working simultaneously, causing interference to the corresponding circuit board assemblies 32 and resulting in inaccurate heating power of the corresponding burner. The isolator 4 blocks this magnetic field conduction path, thus avoiding interference.

[0033] The isolator 4 can be a sheet-like isolator, parallel to the circuit board and base plate 11 of the circuit board assembly 32. The thickness of the isolator can be greater than or equal to 0.3 mm and less than 1.5 mm; for example, the thickness of the isolator can be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, or 1.2 mm. Understandably, if the isolator is too thin, it is easy to deform and break; while an isolator of appropriate thickness can save installation space, facilitate assembly and fixation, and control manufacturing costs; secondly, the sheet-like structure effectively blocks the conduction path of the magnetic field through the base plate 11, while avoiding the formation of new magnetic field reflection or accumulation points due to its own excessive thickness, thus avoiding the introduction of additional electromagnetic interference problems. In some embodiments, the isolator can be an aluminum sheet, such as an aluminum sheet made of 1060 aluminum. Of course, the isolator can also be made of other materials, such as a copper sheet.

[0034] The following explanation will continue with the example of the sheet-like structure of the spacer 4.

[0035] Secondly, the size of the isolator 4 is configured to be greater than or equal to the size of the circuit board assembly 32 in its longitudinal projection. In other words, the longitudinal projection of the circuit board assembly 32 is included in the longitudinal projection of the isolator 4, or coincides with the longitudinal projection of the isolator 4. Understandably, since the isolator 4, the circuit board assembly 32, and the base plate 11 are arranged longitudinally, the longitudinal projection can also be understood as the projection on the base plate 11. The purpose of the size design of the isolator 4 is to achieve full-coverage shielding, ensuring that the magnetic field cannot be conducted through the base plate 11 to the corresponding circuit board assembly 32, thereby spatially cutting off the interference path and avoiding the risk of interference caused by local magnetic leakage.

[0036] It should be further noted that the distribution of the alternating magnetic field is not absolutely limited to the area directly below the coil 31, but rather spreads outwards to a certain extent. In other words, the magnetic field may still bypass the isolator 4 and be conducted to the base plate 11. When several heating components 3 are operating simultaneously, even if the magnetic field generated by a certain coil bypasses its own isolator 4 and is conducted to the base plate 11, the isolators 4 of other components will block the propagation of the magnetic field to the corresponding circuit board assembly 32, thereby preventing interference between the several circuit board assemblies 32 operating simultaneously.

[0037] Optionally, the horizontal distance between the edges of the circuit board assembly 32 and the isolator 4 on the same side is at least greater than 5 mm. Understandably, reserving a certain safety margin can offset the influence of magnetic field diffusion, ensuring that even if the magnetic field diffuses slightly, it can still be effectively blocked by the isolator 4, thereby improving the overall anti-interference efficiency.

[0038] In some embodiments, reference may be made to Figure 2 The size of the spacer 4 can also be configured to be greater than or equal to the size of the entire assembly of the coil 31 and the circuit board assembly 32 in the longitudinal projection. In other words, the longitudinal projection of the entire assembly of the coil 31 and the circuit board assembly 32 is included in the longitudinal projection of the spacer 4, or coincides with the longitudinal projection of the spacer 4. It can be further explained that the coil 31 and the circuit board assembly 32 can at least partially overlap in the longitudinal direction. In other words, there is a spatial overlap area between the two in the longitudinal direction, and when viewed from a longitudinal perspective, the projected outlines of this part of the area overlap with each other.

[0039] Understandably, configuring the size of the isolator 4 to be greater than or equal to the size of the entire assembly of the coil 31 and the circuit board assembly 32 in the longitudinal projection can effectively prevent the magnetic field from bypassing the isolator 4 and being conducted to the housing 1.

[0040] Optionally, the horizontal distance between the integral of the coil 31 and the circuit board assembly 32 and the edge of the isolator 4 located on the same side is at least greater than 5 mm.

[0041] Secondly, in some embodiments, please refer to the following. Figure 4 The housing 1 also includes a storage box 5 at each mounting area, in which the circuit board assembly 32 can be installed and fixed, and the storage box 5 serves to protect the circuit board assembly 32. The storage box 5 can be an open-top box structure, and it can be made of insulating material, such as plastic, to insulate and isolate the circuit board assembly 32 from the base plate 11.

[0042] The storage box 5 is fixedly connected to the base plate 11 of the housing 1. The fixing method can be snap-fit, adhesive, screw-fit, etc. For example, see [reference needed]. Figure 4 Several connecting components 6 are provided between the storage box 5 and the base plate 11 for securing the storage box 5 to the base plate 11. This allows for combination... Figure 3 and Figure 4 For reference, any connecting component 6 may include a hook provided at the bottom or edge of the storage box 5, and a through hole formed on the base plate 11. The hook is configured to pass through the through hole and engage with the side of the base plate 11 facing away from the storage box 5 to fix the storage box 5 to the base plate 11.

[0043] Please continue to refer to this. Figure 4 The cable reel 31 can be positioned above the storage box 5 and on its outer side. The size of the cable reel 31 is larger than the size of the storage box 5. Secondly, the spacer 4 can be positioned on the outer side of the storage box 5, between the storage box 5 and the bottom plate 11 of the housing 1. During assembly, the spacer 4 can be first laid on the bottom plate 11 of the housing 1, with one side surface of the spacer 4 adhering to the bottom plate 11. Then, the storage box 5 is pressed onto the spacer 4 and secured by the connecting assembly 6. At this point, the spacer 4 is secured by the storage box 5, eliminating the need for additional methods of securing the spacer 4. Alternatively, the spacer 4 can be positioned inside the storage box 5, as long as it is between the spacer 4 and the bottom plate 11 of the housing 1.

[0044] In some embodiments, such as Figure 4 As shown, at least one edge of the storage box 5 is located inside the spacer 4 in the longitudinal direction; in other words, the connecting component 6 is located relatively inside the spacer 4. To prevent the spacer 4 from affecting the normal fixation of the storage box 5, a clearance hole 41 can be provided on the spacer 4 to avoid the connecting component 6. It can be further explained that the connecting component 6 serves to limit the spacer 4, preventing the spacer 4 from moving arbitrarily.

[0045] When the clearance hole 41 is located close to the edge of the spacer 4, it can be configured to be formed along one side edge of the spacer 4. Understandably, since the spacer 4 is a sheet structure with a thin thickness and limited structural strength, if the hole is not machined along one side edge of the spacer 4, but is punched directly on the spacer 4, it may cause the edge of the spacer 4 to deform.

[0046] In addition, ventilation holes can be provided on the sides and / or bottom of the housing 1 to dissipate heat and prevent components from aging due to high temperatures. At least one fan can also be provided in each mounting area to accelerate airflow inside the chamber and dissipate heat. For example, the fan can be placed in the storage box 5 and located on the horizontal side of the circuit board assembly 32; heat dissipation fins are also provided between the fan and the circuit board assembly 32.

[0047] In summary, the multi-burner induction cooker 100 of this utility model can effectively solve the problem of magnetic field interference when several coils 31 are working simultaneously by setting an isolation member 4 between the metal base plate 11 and the circuit board assembly 32: when several coils 31 are running synchronously, if the alternating magnetic field generated by them is conducted to other circuit board assemblies 32 through the metal base plate 11, it will be blocked by the isolation member 4, thus avoiding interference to several operating circuit board assemblies 32, thereby ensuring stable and reliable heating effect when several burners are working simultaneously.

[0048] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A multi-burner induction cooker, comprising a housing (1) and a plurality of heating components (3) disposed inside the housing (1); the housing (1) is provided with a base plate (11) for supporting the heating components (3), the base plate (11) being made of metal, characterized in that, Each of the heating components (3) includes a coil (31) and a circuit board assembly (32) disposed between the coil (31) and the base plate (11); an isolator (4) is provided between the circuit board assembly (32) and the base plate (11) to block the magnetic field conduction path.

2. The multi-burner induction cooker according to claim 1, characterized in that, The isolation element (4) is a sheet-shaped isolation sheet, which is parallel to the base plate (11) and the circuit board of the circuit board assembly (32).

3. The multi-burner induction cooker according to claim 2, characterized in that, The separator (4) is an aluminum sheet with a thickness greater than or equal to 0.3 mm and less than or equal to 1.5 mm.

4. The multi-burner induction cooker according to claim 1, characterized in that, The size of the isolator (4) is configured to be greater than or equal to the projected size of the circuit board assembly (32) on the base plate (11).

5. The multi-burner induction cooker according to claim 4, characterized in that, The horizontal distance between the edges of the circuit board assembly (32) and the isolator (4) on the same side is at least greater than 5 mm.

6. The multi-burner induction cooker according to claim 4, characterized in that, The size of the isolation element (4) is configured to be greater than or equal to the projected size of the entire assembly of the coil (31) and the circuit board assembly (32) on the base plate (11).

7. The multi-burner induction cooker according to claim 6, characterized in that, The horizontal distance between the integral of the coil (31) and the circuit board assembly (32) and the edge of the isolator (4) on the same side is at least greater than 5 mm.

8. The multi-burner induction cooker according to claim 1, characterized in that, The housing (1) is also provided with a storage box (5) for accommodating the circuit board assembly (32), and the storage box (5) is made of insulating material; The isolation element (4) is disposed on the inner side of the storage box (5), or the isolation element (4) is disposed on the outer side of the storage box (5).

9. The multi-burner induction cooker according to claim 8, characterized in that, The isolation element (4) is a sheet-shaped isolation sheet, which is disposed on the outside of the storage box (5) and attached to the bottom plate (11); the storage box (5) presses the isolation sheet onto the bottom plate (11).

10. The multi-burner induction cooker according to claim 9, characterized in that, A connecting component (6) is provided between the storage box (5) and the base plate (11) for fixing the storage box (5) onto the base plate (11); The connecting component (6) is located on the inner side of the edge of the isolator (4), and the isolator (4) is provided with a clearance hole (41) for avoiding the connecting component (6).

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