Coil panel assembly and cooking utensil

Abstract

The utility model discloses a coil panel assembly and a cooking utensil, and relates to the technical field of electromagnetic heating, the coil panel assembly comprises a support structure and an electromagnetic heating assembly, the electromagnetic heating assembly is arranged on the support structure, the electromagnetic heating assembly comprises a first electromagnetic heating coil and a second electromagnetic heating coil which are laminated in a first direction, the first side of the first electromagnetic heating coil and the first side of the second electromagnetic heating coil are used for corresponding to a to-be-heated pot, and compared with the first electromagnetic heating coil, the second electromagnetic heating coil is arranged to generate a higher magnetic field in the direction where the first side of the second electromagnetic heating coil is located when the second electromagnetic heating coil is electrified; the second electromagnetic heating coil can conduct electromagnetic heating on the higher position of the side wall of the cookware, one of the first electromagnetic heating coil and the second electromagnetic heating coil is flexibly selected to work according to the requirements for the type of the cookware and the size of the heating range, and therefore the cookware heating device can have the functions of cookware bottom heating and cookware wall heating. The utility model discloses a coil panel assembly compatible with cooking requirements of stir-frying and soup.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating, in particular to a coil disk component and a cooking utensil. Background Art

[0002] Induction cookers generally use conventional wire reels with conventional spiral windings. When heating cookware, especially woks, conventional wire reels only heat the bottom of the wok, but cannot effectively heat the walls of the wok. This results in uneven heating of the ingredients, burnt bottom, and no wok gas. Utility Model Content

[0003] The utility model aims at the above-mentioned technical problems. The application considers using a double-sided winding coil with a three-dimensional heating effect to heat the pot wall in three dimensions, which has a good improvement effect on the cooking experience. However, in the soup cooking scene that does not require a three-dimensional heating effect, if a double-sided winding coil is still used for heating, the soup pot wall will be heated. If the water level is lower than a certain height of the pot wall, the pot wall will dry burn. In addition, if the soup pot handle is made of metal, it may also be heated, causing burns, which poses certain safety hazards. How to provide a cooking utensil that can heat the bottom of the pot and the pot wall at the same time, and is compatible with the cooking needs of cooking and soup is a further problem faced by this design.

[0004] In order to achieve the above object, the utility model provides a coil disk assembly, the coil disk assembly comprising:

[0005] a support structure; and,

[0006] The electromagnetic heating assembly is arranged on the support structure, and includes a first electromagnetic heating coil and a second electromagnetic heating coil stacked in a first direction, the first electromagnetic heating coil and the second electromagnetic heating coil both having a first side and a second side in the first direction, the first sides of the first electromagnetic heating coil and the second electromagnetic heating coil are used to correspond to the cookware to be heated, and compared with the first electromagnetic heating coil, the second electromagnetic heating coil is configured to generate a higher magnetic field in the direction of the first side of the second electromagnetic heating coil when energized, so that the second electromagnetic heating coil can perform electromagnetic heating on a higher part of the side wall of the cookware.

[0007] In one embodiment, the second electromagnetic heating coil includes at least one pair of first winding units, each pair of the first winding units includes two first winding units arranged on the support structure and distributed along the circumference of the support structure, each of the first winding units is arranged in an annular shape, and has a first winding ring segment close to the center of the support structure, and a second winding ring segment close to the edge of the support structure;

[0008] In the pair of first winding units, the directions of the currents of the two first winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two first winding units, and in at least one of the first winding units, the width of at least part of the first winding loop segment is d1, and the width of at least part of the second winding loop segment is d2, and d1 is greater than d2.

[0009] In one embodiment, the second electromagnetic heating coil includes at least one pair of first winding units, each pair of the first winding units includes two first winding units arranged on the support structure and distributed along the circumference of the support structure, each of the first winding units is arranged in an annular shape, and has a first winding ring segment close to the center of the support structure, and a second winding ring segment close to the edge of the support structure;

[0010] In the pair of first winding units, the directions of the currents of the two first winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two first winding units, and in at least one of the first winding units, the winding center of the first winding unit is located on the side of its geometric center close to the second winding loop segment.

[0011] In one embodiment, the winding gap of at least part of the first winding loop segment is larger than the winding gap of the second winding loop segment.

[0012] In one embodiment, the number of layers of the first winding unit at the first winding loop segment is N1, and the number of layers of the first winding unit at the second winding loop segment is N2, wherein N2 is greater than N1.

[0013] In one embodiment, the first electromagnetic heating coil is disposed on a second side of the second electromagnetic heating coil.

[0014] In one embodiment, the coil disk assembly further comprises a magnet structure disposed on a second side of the second electromagnetic heating coil;

[0015] The first electromagnetic heating coil is arranged on a side of the magnetic structure facing the second electromagnetic heating coil.

[0016] In one embodiment, the magnet structure includes two first magnetic pole ends disposed corresponding to middle portions of the two first winding units, and a first extension portion located between the two first magnetic pole ends.

[0017] In one embodiment, the magnet structure also includes a second magnetic pole end arranged corresponding to the middle of the first electromagnetic heating coil, a third magnetic pole end arranged corresponding to the periphery of the first electromagnetic heating coil, and a second extension portion located between the second magnetic pole end and the third magnetic pole end.

[0018] In one embodiment, the support structure includes a first support having a first side and a second side in the first direction;

[0019] The second electromagnetic heating coil includes a second winding unit, which includes multiple turns of coils, each turn of the coil includes a first wire segment and a second wire segment that are connected to each other and have opposite currents, and each turn of the coil is wound and installed on the first side and the second side of the first bracket, so that the first side of the first bracket has multiple first wire segments and the second side of the bracket structure has multiple second wire segments.

[0020] In one embodiment, the coil disk assembly further comprises a magnet structure, wherein the magnet structure is disposed between the plurality of first wire segments and the plurality of second wire segments;

[0021] The first electromagnetic heating coil is disposed on a side of the magnet structure facing the first wire segments.

[0022] In one embodiment, the first electromagnetic heating coil is disposed between the magnet structure and the first plurality of wire segments.

[0023] In one embodiment, the coil disk assembly further includes a magnetic shielding member, and the magnetic shielding member is disposed on the second side of the first electromagnetic heating coil and the second electromagnetic heating coil.

[0024] In one embodiment, the magnetic shielding member includes a first shielding portion disposed on a second side of the first electromagnetic heating coil and the second electromagnetic heating coil; and / or,

[0025] The magnetic shielding member also includes a second shielding portion arranged around the periphery of the electromagnetic heating component.

[0026] The utility model also provides a cooking utensil, the cooking utensil comprising a coil disk assembly, the coil disk assembly comprising:

[0027] a support structure; and,

[0028] The electromagnetic heating assembly is arranged on the support structure, and includes a first electromagnetic heating coil and a second electromagnetic heating coil stacked in a first direction, the first electromagnetic heating coil and the second electromagnetic heating coil both having a first side and a second side in the first direction, the first sides of the first electromagnetic heating coil and the second electromagnetic heating coil are used to correspond to the cookware to be heated, and compared with the first electromagnetic heating coil, the second electromagnetic heating coil is configured to generate a higher magnetic field in the direction of the first side of the second electromagnetic heating coil when energized, so that the second electromagnetic heating coil can perform electromagnetic heating on a higher part of the side wall of the cookware.

[0029] In the technical solution provided by the utility model, when the heating range requirement in the height direction of the cookware is small, it can be heated by the first electromagnetic heating coil. When the heating range requirement in the height direction of the cookware is large, it can be heated by the second electromagnetic heating coil. According to the type of cookware and the size requirement of the heating range, one of the first electromagnetic heating coil and the second electromagnetic heating coil can be flexibly selected to work, so as to provide a coil disk assembly that can have both the bottom heating and the wall heating functions and is compatible with the cooking needs of stir-frying and soups. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of an embodiment of a cooking utensil provided by the utility model;

[0032] Figure 2 for Figure 1 A schematic diagram of the second electromagnetic heating coil and the pot;

[0033] Figure 3 for Figure 2 A schematic diagram of an embodiment of the second electromagnetic heating coil;

[0034] Figure 4 for Figure 3 A schematic diagram of the current direction and magnetic poles after the plurality of first winding units are powered on;

[0035] Figure 5 for Figure 3 A schematic diagram of a plurality of first winding units and a magnet structure;

[0036] Figure 6 for Figure 2 Schematic diagram of the magnetic field formed by each pair of winding units;

[0037] Figure 7 for Figure 1 An exploded diagram of a cooking appliance in FIG.

[0038] Figure 8 for Figure 7 A cross-sectional schematic diagram of the first electromagnetic heating coil and the second electromagnetic heating coil;

[0039] Fig. 9 for Figure 1A schematic diagram of another embodiment of the second electromagnetic heating coil;

[0040] Fig.10 for Figure 7 Schematic diagram of the electromagnetic heating structure in .

[0041] Description of Figure Numbers:

[0042] 100. Coil disk assembly; 1. Support structure; 2. First electromagnetic heating coil; 3. Second electromagnetic heating coil; 31. First winding unit; 311. First winding loop segment; 312. Second winding loop segment; 32. Second winding unit; 321. First wire segment; 322. Second wire segment; 4. Magnet structure; 41. First magnetic pole end; 42. First extension; 43. Second magnetic pole end; 44. Third magnetic pole end; 45. Second extension; 5. Magnetic shielding member;

[0043] 200. Cookware;

[0044] 300. Cooking utensil; 301. Control device.

[0045] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0049] Induction cookers generally use conventional coils with conventional spiral windings. When heating pots, especially woks, conventional coils only heat the bottom of the wok, but cannot effectively heat the wok walls. This results in uneven heating of ingredients, burnt bottom, and no wok gas. This application considers using a double-sided coil with a three-dimensional heating effect to heat the pot wall in three dimensions, which has a great improvement effect on the cooking experience. However, in a soup cooking scenario that does not require a three-dimensional heating effect, if a double-sided coil is still used for heating, the soup pot wall will be heated. If the water level is below a certain height of the pot wall, the pot wall will dry burn. In addition, if the soup pot handle is made of metal, it may also be heated, causing burns, which poses certain safety hazards. How to provide a control method and cooking utensil that can combine the bottom heating and pot wall heating functions and is compatible with the cooking needs of cooking and soup is a further problem faced by this design.

[0050] See also Figure 1 and Figure 7 The utility model provides a coil disk assembly 100, the coil disk assembly 100 includes a support structure 1 and an electromagnetic heating assembly, the electromagnetic heating assembly is arranged on the support structure 1, the electromagnetic heating assembly includes a first electromagnetic heating coil 2 and a second electromagnetic heating coil 3 stacked in a first direction, the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 both have a first side and a second side in the first direction, the first sides of the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 are used to correspond to the pot 200 to be heated, compared with the first electromagnetic heating coil 2, the second electromagnetic heating coil 3 is configured to generate a higher magnetic field in the direction of the first side of the second electromagnetic heating coil 3 when energized, so that the second electromagnetic heating coil 3 can electromagnetically heat the higher part of the side wall of the pot 200.

[0051] Please note that Figure 7, the first electromagnetic heating coil 2 can be set as a conventional coil with the most common conventional spiral winding on the market. Because the winding method of the first electromagnetic heating coil 2 determines that the height of the peripheral magnetic field of the conventional coil is relatively low, the magnetic field range that can act on the wall of the frying pan is also small, and the intensity is weak, so the heating effect on the pot wall is poor. Of course, the first electromagnetic heating coil 2 is not limited to the conventional coil, and the above conventional coil is only used to illustrate the utility model and is not used to limit the scope of the utility model.

[0052] It should also be noted that the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 are stacked in the first direction. When the first electromagnetic heating coil 2 can be set as a conventional wire spiral coil, when corresponding to the bottom of the ordinary cookware 200, the second electromagnetic heating coil 3 can be set to be a coil with the same size as the projection of the first electromagnetic heating coil 2 in the first direction, and can generate a higher magnetic field in the first direction. Of course, in order to be able to correspond to a larger cookware 200, the second electromagnetic heating coil 3 can be set to a larger diameter than the first electromagnetic heating coil 2.

[0053] It can be understood that the second electromagnetic heating coil 3 can generate a higher magnetic field in the direction of the heating zone. Therefore, when targeting a pot 200 that requires a larger heating area, such as a large soup pot or a frying pan, the second electromagnetic heating coil 3 can be fully coupled with this type of pot 200 for heating; when targeting a pot 200 that requires a smaller heating area, such as a small soup pot or a honeycomb bottom aluminum pot, in order to avoid the pot wall being heated and dry-burned when the water level in the small soup pot is low, there is no need to generate a higher magnetic field in the direction of the heating zone. At this time, the second electromagnetic heating coil 3 is not required to work, and it is only necessary to heat the bottom of the pot 200 of this type through the first electromagnetic heating coil 2.

[0054] In the technical solution provided by the utility model, when the heating range requirement of the pot 200 in the height direction is relatively small, it can be heated by the first electromagnetic heating coil 2. When the heating range requirement of the pot 200 in the height direction is relatively large, it can be heated by the second electromagnetic heating coil 3. According to the type of the pot 200 and the size requirement of the heating range, one of the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 can be flexibly selected to work, so as to provide a coil disk assembly 100 that can have both the bottom heating and the wall heating functions and is compatible with the cooking needs of stir-frying and soups.

[0055] See also Figures 2 to 6In the first embodiment, the second electromagnetic heating coil 3 includes at least one pair of first winding units 31, each pair of the first winding units 31 includes two first winding units 31 arranged on the support structure 1 and distributed along the circumference of the support structure 1, each first winding unit 31 is arranged in a ring shape, and has a first winding ring segment 311 close to the center of the support structure 1, and a second winding ring segment 312 close to the edge of the support structure 1; in the pair of first winding units 31, the directions of the currents of the two first winding units 31 are set to be opposite, so that the middle parts of the two first winding units 31 form opposite magnetic poles, and in at least one of the first winding units 31, the width of at least part of the first winding ring segment 311 is d1, and the width of at least part of the second winding ring segment 312 is d2, and d1 is greater than d2.

[0056] In the second embodiment, the second electromagnetic heating coil 3 includes at least one pair of first winding units 31, each pair of the first winding units 31 includes two first winding units 31 arranged on the support structure 1 and distributed along the circumference of the support structure 1, each first winding unit 31 is arranged in a ring shape, and has a first winding ring segment 311 close to the center of the support structure 1, and a second winding ring segment 312 close to the edge of the support structure 1; in the pair of first winding units 31, the directions of the currents of the two first winding units 31 are set to be opposite, so that the middle parts of the two first winding units 31 form opposite magnetic poles, and in at least one of the first winding units 31, the winding center of the first winding unit 31 is located on the side of its geometric center close to the second winding ring segment 312.

[0057] It should be pointed out that the shapes of the first winding units 31 in the "multiple first winding units 31" mentioned in the present application can be set the same or differently. Each first winding unit 31 is formed by winding multiple turns of coils, and each turn of coils in each first winding unit 31 can be regarded as an annular structure. Of course, the annular structure is not limited to being circular, it can be square or elliptical. Each first winding unit 31 can be laid flat along a surface area, and the surface area can be a plane or a curved surface. Each first winding unit 31 can also be bent, which can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0058] “The multiple first winding units 31 are distributed along the circumference of the support structure 1” can mean that the multiple first winding units 31 are distributed in a ring shape on the same side of the support structure 1, or some of the first winding units 31 are arranged on one side of the support structure 1, and the other part of the first winding units 31 are arranged on the other side of the support structure 1. However, as long as they are distributed in a ring shape on the projection surface of the support structure 1, they can be regarded as “the multiple first winding units 31 are distributed along the circumference of the support structure 1”.

[0059] “Direction of current” refers to whether the current of the first winding unit 31 flows in a clockwise or counterclockwise direction, and “directions of currents of the two first winding units 31 are set to be opposite”, that is, when the direction of current of one first winding unit 31 is clockwise, the direction of current of the other first winding unit 31 is counterclockwise.

[0060] It should be noted that according to Ampere's law: hold the energized solenoid with your right hand and let your four fingers point in the direction of the current, then the end pointed by your thumb is the N pole of the energized solenoid. Figure 6 When the current directions of the two first winding units 31 are set to be opposite, a closed magnetic field is formed between the two first winding units 31. For example, one of the two first winding units 31 is set as the first coil winding, and the other is set as the second coil winding. When the first coil winding and the second coil winding are laid flat in the horizontal direction, a magnetic pole N pole is formed on the upper side of the first coil winding and an S pole is formed on the lower side. At the same time, a magnetic pole S pole is formed on the upper side of the second coil winding and an N pole is formed on the lower side. In this way, the magnetic field lines extend from the N pole of the first coil winding to the S pole of the second coil winding, then from the S pole of the second coil winding to the N pole, then from the N pole of the second coil winding to the S pole of the first coil winding, and then from the S pole of the first coil winding back to the N pole of the first coil winding, thereby forming a closed magnetic field.

[0061] Then, when a pair of the first winding units 31 are energized, the closed magnetic field formed between the two special-shaped magnetic poles formed by the two first winding units 31 can couple with the pot wall far away from the first winding units 31 to heat the pot wall.

[0062] The "width" in "at least part of the first winding loop segment 311 has a width of d1, at least part of the second winding loop segment 312 has a width of d2, and d1 is greater than d2" refers to the distance between a turn of the coil located at the innermost circle of the ring and a turn of the coil located at the outermost circle of the ring among the multiple turns of the first winding unit 31, in the direction outward from the geometric center of the first winding unit 31. For details, please refer to Figure 5As shown, the winding length of the corresponding area of ​​the second winding loop segment 312 can be reduced; it can also be that in the winding of the first winding loop segment 311 and the second winding loop segment 312, when the adjacent winding segments in each winding loop segment are arranged in parallel, the winding gap of the first winding loop segment 311 is set to be larger than the winding gap of the second winding loop segment 312; of course, in each winding loop segment, when the adjacent winding segments are not arranged in parallel, it will cause uneven winding gaps, but other parts of the winding segments can be adaptively adjusted to ultimately achieve d1 greater than d2.

[0063] "The winding center of the first winding unit 31 is located on the side of its geometric center close to the second winding loop segment 312." The first winding unit 31 can be set to a fan-like, triangle-like or other shape, and the geometric center can be adjusted by adjusting the shape of the first winding unit 31.

[0064] It can be understood that, according to Ampere's law, the magnetic poles formed by the first winding unit 31 correspond to the inner ring area of ​​the ring. When "d1 is greater than d2" or "the winding center is located on the side of its geometric center close to the second winding ring segment 312", the corresponding magnetic poles of the first winding unit 31 are formed in the area close to the bracket and close to the outer periphery, thereby achieving the largest possible heating range of the pot wall.

[0065] Of course, the specific methods of setting the width of the first winding loop segment 311 to be greater than the width of the second winding loop segment 312, and the specific methods of locating the winding center of the first winding unit 31 on the side of its geometric center close to the second winding loop segment 312 are not limited to the above examples. Technical personnel in the relevant field may make other changes under the inspiration of the technical essence of the embodiments of this specification. However, as long as the functions and effects achieved are the same or similar to those of the embodiments of this specification, they should be covered within the protection scope of the embodiments of this specification.

[0066] Of course, the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 are not limited to the above examples. Technical personnel in the relevant field may make other changes under the guidance of the technical essence of the embodiments of this specification. However, as long as the functions and effects achieved are the same or similar to those of the embodiments of this specification, they should be covered within the protection scope of the embodiments of this specification.

[0067] In the technical solution provided by the utility model, in at least one first winding unit 31, the magnetic pole formed in the middle thereof is close to one side of the corresponding second winding ring segment 312, so that the magnetic pole formed in the middle of the first winding unit 31 can be closer to one side of the edge of the support structure 1, and can be coupled with the position of the corresponding pot wall, thereby increasing the heating range of the pot wall, thereby improving the uniformity of heating the bottom and pot wall of the pot 200, so as to solve the problem that the existing induction cooker has a poor heating effect on the pot wall and it is difficult to increase the heat of the pot wall even if the diameter of the wire coil is increased.

[0068] Furthermore, in order to make the magnetic fields generated by the first winding loop segment 311 and the second winding loop segment 312 uniform, so that the pot 200 is heated uniformly, in one embodiment, at least part of the winding gap of the first winding loop segment 311 is larger than the winding gap of the second winding loop segment 312. In this way, it is only necessary to adjust the winding gap of the second winding loop segment 312 and set it more densely, so that the magnetic field generated by the corresponding second winding loop segment 312 is larger than the magnetic field generated by the corresponding first winding loop segment 311, but can be distributed more uniformly in the magnetic field interval generated by the second winding loop segment 312, so that the area acting on the pot wall is heated uniformly.

[0069] In another embodiment, the number of layers of the first winding unit 31 at the first winding loop segment 311 is N1, and the number of layers of the first winding unit 31 at the second winding loop segment 312 is N2, wherein N2 is greater than N1.

[0070] Since the first winding unit 31 is arranged in a ring shape, the number of coils of the first winding loop segment 311 and the second winding loop segment 312 is the same. When N2 is greater than N1, it can be understood that the second winding loop segment 312 is higher in height than the first winding loop segment 311, and the second winding loop segment 312 can also be smaller in width than the first winding loop segment 311, so that the magnetic pole formed in the middle of the first winding unit 31 is close to one side of the corresponding second winding loop segment 312.

[0071] In this embodiment, the first electromagnetic heating coil 2 is disposed on the second side of the second electromagnetic heating coil 3 .

[0072] It should be noted that, due to normal electromagnetic heating, there are certain requirements for the disk spacing. The "disk spacing" usually refers to the distance between the electromagnetic coil winding and the bottom of the pot. Generally speaking, in order to ensure better heating effect and safety and avoid IGBT incompatibility causing the electromagnetic heating coil to not work properly or performance degradation, it is necessary to set the corresponding working distance according to the performance and working parameters of the electromagnetic heating coils to ensure that the disk spacing is within the appropriate preset range and can be coupled with the pot 200 with high efficiency.

[0073] In this application, the disk spacing of the first electromagnetic heating coil 2 needs to be set to be larger than the disk spacing of the second electromagnetic heating coil 3 so that both the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 can achieve optimal working performance. Therefore, the first electromagnetic heating coil 2 is arranged on the second side of the second electromagnetic heating coil 3 to ensure that the efficiency of the electromagnetic induction heating of the two electromagnetic heating coils is improved and energy loss is reduced.

[0074] For further information, see Figure 7 In this embodiment, the coil disk assembly 100 further includes a magnetic structure 4 disposed on a second side of the second electromagnetic heating coil 3 ; the first electromagnetic heating coil 2 is disposed on a side of the magnetic structure 4 facing the second electromagnetic heating coil 3 .

[0075] By setting the magnetic structure 4, the focusing effect of the magnetic field of the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 can be enhanced, the distribution of the magnetic field can be adjusted, and the distribution of the magnetic field can be optimized, so that the magnetic field is more concentrated on the bottom of the pot or the pot 200, and the magnetic field is caused to cover the surface of the bottom of the pot or the pot 200 more evenly, thereby improving the efficiency of electromagnetic induction heating and making the heating more uniform and rapid.

[0076] In this example, see Fig.10 The magnet structure 4 includes two first magnetic pole ends 41 disposed corresponding to the middle parts of the two first winding units 31 , and a first extending portion 42 located between the two first magnetic pole ends 41 .

[0077] The two first magnetic pole ends 41 of the magnetic structure 4 allow more magnetic flux to pass through the magnetic circuit, reduce leakage magnetic flux, change the path of the magnetic circuit, and make the magnetic field more concentrated and evenly distributed in the required area, thereby improving the efficiency and performance of the magnetic circuit. The strength of the magnetic field in the middle of the two first winding units 31 of the second electromagnetic heating coil 3 can be increased, and the energy efficiency of the coupling between the second electromagnetic heating coil 3 and the cooker 200 can be further improved.

[0078] Furthermore, the magnet structure 4 further includes a second magnetic pole end 43 disposed corresponding to the middle of the first electromagnetic heating coil 2, a third magnetic pole end 44 disposed corresponding to the periphery of the first electromagnetic heating coil 2, and a second extension portion 45 located between the second magnetic pole end 43 and the third magnetic pole end 44. Similarly, the second magnetic pole end 43, the third magnetic pole end 44 and the second extension portion 45 are disposed to increase the strength of the magnetic field of the first electromagnetic heating coil 2, and further improve the energy efficiency of the coupling between the first electromagnetic heating coil 2 and the cookware 200.

[0079] In a third embodiment, the support structure 1 includes a first support, the first support having a first side and a second side in the first direction; the second electromagnetic heating coil 3 includes a second winding unit 32, the second winding unit 32 includes a plurality of turns of coils, each turn of the coil includes a first wire segment 321 and a second wire segment 322 that are connected to each other and have opposite currents, and each turn of the coil is wound and installed on the first side and the second side of the first support, so that the first side of the first support has a plurality of the first wire segments 321, and the second side of the support structure 1 has a plurality of the second wire segments 322.

[0080] Because the first wire segment 321 corresponding to the cooker 200 in the second electromagnetic heating coil 3 heats the cooker 200 when energized, the magnetic field formed by the first wire segment 321 extends toward the periphery of the outer end area of ​​the first wire segment 321 on the one hand to have a wider magnetic field area, and extends outwardly toward the first wire segment 321 to have a higher magnetic field distribution area, so that the induction cooker can not only heat the bottom of the wok, but also a wider area of ​​the bottom of the wok, and can extend to the side wall of the wok to heat the side of the wok, thereby realizing three-dimensional heating.

[0081] In this example, see Figure 7 and Figure 8 The coil disk assembly 100 further includes a magnetic structure 4 , which is disposed between the first plurality of wire segments 321 and the second plurality of wire segments 322 ; the first electromagnetic heating coil 2 is disposed on a side of the magnetic structure 4 facing the first plurality of wire segments 321 .

[0082] Since the second electromagnetic heating coil 3 relies on the multiple first wire segments 321 to generate a higher magnetic field, it is only necessary to set the magnetic structure 4 on the second side of the multiple first wire segments 321. In order to enable the first electromagnetic heating coil 2 to also share the magnetic structure 4, the first electromagnetic heating coil 2 can be set on the side of the magnetic structure 4 facing the multiple first wire segments 321. The structure is compact, and the magnetic conductivity of two electromagnetic heating coils can be achieved simultaneously by using one magnetic structure 4.

[0083] For further information, see Figure 8 In this embodiment, the first electromagnetic heating coil 2 is arranged between the magnetic structure 4 and the plurality of first wire segments 321 .

[0084] In order to ensure the electromagnetic induction heating efficiency of the first electromagnetic heating coil 2 and avoid the first electromagnetic heating coil 2 not being able to work properly or performance degradation due to IGBT incompatibility, the working distance between the coil winding of the conventional wire drum and the bottom of the pot is generally controlled to be about 10 mm. The setting of this distance can ensure the efficiency of electromagnetic induction heating and reduce energy loss.

[0085] As for the second electromagnetic heating coil 3, in order to ensure its IGBT compatibility, the disk spacing of the second electromagnetic heating coil 3 can be controlled within the range of about 5mm-7mm. Since the cookware 200 is heated by the magnetic field generated by the first wire segment 321 in the present application, it is only necessary to set the first wire segment 321 so that the disk spacing is closer to the cookware 200, and the first electromagnetic heating coil 2 is located below the first wire segment 321. Therefore, the first electromagnetic heating coil 2 is set between multiple first wire segments 321 and multiple second wire segments 322, so that the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 can both work with optimal performance.

[0086] Further, in order to prevent the coil disk assembly 100 from heating the area that does not need to be heated, please refer to Figure 7 In this embodiment, the coil disk assembly 100 further includes a magnetic shielding member 5 , and the magnetic shielding member 5 is disposed on the second side of the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 .

[0087] Specifically, in this embodiment, the magnetic shielding component 5 includes a first shielding portion arranged on the second side of the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3; and / or, the magnetic shielding component 5 also includes a second shielding portion arranged around the periphery of the electromagnetic heating assembly.

[0088] Thus, the first shielding part with good magnetic conductivity is provided, which is conducive to gathering magnetic lines of force and improving the heating power and heating efficiency of the coil disk assembly 100. At the same time, it can isolate the coil magnetic field for the electronic components arranged below the coil disk assembly 100 to ensure the reliability of the electronic components. When the induction cooker with the coil disk assembly 100 is placed on a metal table for use, the magnetic field below can be prevented from heating the metal table at the bottom of the induction cooker.

[0089] Since the magnetic pole formed in the middle of the first winding unit 31 or the second winding unit 32 is close to the edge of the support structure 1, the magnetic field of the coil disk assembly 100 near its periphery will be correspondingly enhanced. In order to avoid electromagnetic interaction between the first winding unit 31 or the second winding unit 32 and the tools and objects with magnetic properties on the periphery of the coil disk assembly 100, which may cause accidental heating, the magnetic field shielding can be well achieved by setting the second shielding part.

[0090] The utility model also provides a cooking utensil 300, see Figure 7 The cooking utensil 300 comprises the coil disk assembly 100 and the electric control device of the above-mentioned embodiments. The specific structure of the coil disk assembly 100 refers to the above-mentioned embodiments. Since the cooking utensil 300 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0091] The cooking utensil 300 may be an induction cooker or an electric pressure cooker, etc. Only the cooking utensil 300 having the coil disk assembly 100 belongs to the cooking utensil 300 mentioned in the present invention.

[0092] Furthermore, in order to realize automatic control, in this embodiment, the cooking utensil 300 further includes a pot 200 detection unit, which is used to generate detection parameters when the electromagnetic heating coil that is powered on acts on the pot 200 placed in the heating zone; the control device 301 is electrically connected to the pot 200 detection unit, and is used to control the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 to work according to the pot 200 detection unit. The pot 200 detection unit can timely detect whether there is a pot 200 or the type of the pot 200, and the first electromagnetic heating coil 2 and the second electromagnetic heating coil 3 can be adjusted in time according to the detected parameters, so as to facilitate the partial intelligent control of the cooking utensil 300.

[0093] In this embodiment, the cooking appliance 300 further includes a main body and a control device, the coil disk assembly 100 is arranged on the main body, the control device includes an operation key and / or a display control area arranged on the surface of the main body, and the control device 301 is electrically connected to the control device and is used to work according to the control device. In this way, the user can input a working instruction through the operation key or the display control area, and the control device 301 can manually control the required electromagnetic heating component to heat according to the input working instruction.

[0094] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A coil disk assembly, characterized in that: include: Support structure; as well as, The electromagnetic heating assembly is arranged on the support structure, and includes a first electromagnetic heating coil and a second electromagnetic heating coil stacked in a first direction, the first electromagnetic heating coil and the second electromagnetic heating coil both having a first side and a second side in the first direction, the first sides of the first electromagnetic heating coil and the second electromagnetic heating coil are used to correspond to the cookware to be heated, and compared with the first electromagnetic heating coil, the second electromagnetic heating coil is configured to generate a higher magnetic field in the direction of the first side of the second electromagnetic heating coil when energized, so that the second electromagnetic heating coil can perform electromagnetic heating on a higher part of the side wall of the cookware.

2. The coil disk assembly according to claim 1, characterized in that The second electromagnetic heating coil comprises at least one pair of first winding units, each pair of the first winding units comprises two first winding units arranged on the support structure and distributed along the circumference of the support structure, each of the first winding units is arranged in an annular shape, and has a first winding ring segment close to the center of the support structure, and a second winding ring segment close to the edge of the support structure; In the pair of first winding units, the directions of the currents of the two first winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two first winding units, and in at least one of the first winding units, the width of at least part of the first winding loop segment is d1, and the width of at least part of the second winding loop segment is d2, and d1 is greater than d2.

3. The coil disk assembly according to claim 1, characterized in that The second electromagnetic heating coil comprises at least one pair of first winding units, each pair of the first winding units comprises two first winding units arranged on the support structure and distributed along the circumference of the support structure, each of the first winding units is arranged in an annular shape, and has a first winding ring segment close to the center of the support structure, and a second winding ring segment close to the edge of the support structure; In the pair of first winding units, the directions of the currents of the two first winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two first winding units, and in at least one of the first winding units, the winding center of the first winding unit is located on the side of its geometric center close to the second winding loop segment.

4. The coil disk assembly according to claim 2 or 3, characterized in that: The winding gap of at least part of the first winding loop segment is larger than the winding gap of the second winding loop segment.

5. The coil disk assembly according to claim 2 or 3, characterized in that: The number of layers of the first winding unit at the first winding loop segment is N1, and the number of layers of the first winding unit at the second winding loop segment is N2, wherein N2 is greater than N1.

6. The coil disk assembly according to claim 2, characterized in that The first electromagnetic heating coil is arranged on a second side of the second electromagnetic heating coil.

7. The coil disk assembly according to claim 6, characterized in that The coil disk assembly further includes a magnet structure disposed on a second side of the second electromagnetic heating coil; The first electromagnetic heating coil is arranged on a side of the magnetic structure facing the second electromagnetic heating coil.

8. The coil disk assembly according to claim 7, characterized in that The magnet structure includes two first magnetic pole ends arranged corresponding to the middle parts of the two first winding units, and a first extending portion located between the two first magnetic pole ends.

9. The coil disk assembly according to claim 7, characterized in that The magnet structure further includes a second magnetic pole end arranged corresponding to the middle of the first electromagnetic heating coil, a third magnetic pole end arranged corresponding to the periphery of the first electromagnetic heating coil, and a second extension portion located between the second magnetic pole end and the third magnetic pole end.

10. The coil disk assembly according to claim 1, characterized in that The support structure includes a first support having a first side and a second side in the first direction; The second electromagnetic heating coil includes a second winding unit, which includes multiple turns of coils, each turn of the coil includes a first wire segment and a second wire segment that are connected to each other and have opposite currents, and each turn of the coil is wound and installed on the first side and the second side of the first bracket, so that the first side of the first bracket has multiple first wire segments and the second side of the bracket structure has multiple second wire segments.

11. The coil disk assembly according to claim 10, characterized in that The coil disk assembly further includes a magnet structure, wherein the magnet structure is disposed between the plurality of first wire segments and the plurality of second wire segments; The first electromagnetic heating coil is disposed on a side of the magnet structure facing the first wire segments.

12. The coil disk assembly according to claim 11, characterized in that The first electromagnetic heating coil is disposed between the magnet structure and the plurality of first wire segments.

13. The coil disk assembly according to claim 1 or 2, characterized in that: The coil disk assembly further includes a magnetic shielding member disposed on a second side of the first electromagnetic heating coil and the second electromagnetic heating coil.

14. The coil disk assembly according to claim 13, characterized in that The magnetic shielding member comprises a first shielding portion arranged on a second side of the first electromagnetic heating coil and the second electromagnetic heating coil; and / or, The magnetic shielding member also includes a second shielding portion arranged around the periphery of the electromagnetic heating component.

15. A cooking utensil, characterized in that: Comprising the coil disk assembly according to any one of claims 1 to 14.

Images