Electromagnetic cooking utensil

Abstract

The utility model discloses an electromagnetic cooking utensil, and relates to the technical field of cooking utensils, the electromagnetic cooking utensil comprises a bottom shell, a panel, an electromagnetic heating device, a magnet structure and a plurality of temperature measuring parts, the panel is arranged at the upper end of the bottom shell; the electromagnetic heating device comprises a mounting bracket and an electromagnetic coil mounted on the mounting bracket; the magnet structure is arranged below the electromagnetic coil and comprises a plurality of magnetic strips, and the magnetic strips extend in the radial direction of the electromagnetic coil and are arranged in the circumferential direction of the electromagnetic coil at intervals; the plurality of temperature measuring parts comprise a plurality of first temperature measuring parts located above the electromagnetic coil and the magnetic strip, each first temperature measuring part is located above the corresponding magnet, the panel in the area above is detected and measured, the highest temperature point on the panel can be detected, the working state of the electromagnetic heating device is adjusted in time according to monitoring information, and the electromagnetic heating efficiency is improved. And the panel does not need to use a high-cost and high-temperature-resistant microcrystalline glass panel, so that the cost of the electromagnetic cooking utensil is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cooking appliance technology, and in particular to an electromagnetic cooking appliance. Background Technology

[0002] Induction cookers currently widely employ single-point temperature measurement technology. However, due to limitations in their structural layout, the temperature detected by the temperature sensing element only reflects the temperature of a specific area of ​​the cooktop. This localized temperature is further affected by the temperature of the pot bottom. When the pot bottom is heated unevenly, the temperature measurement results may be inaccurate, making it impossible to precisely control the temperature during cooking. This often leads to poor cooking results for ingredients requiring strict temperature control. Furthermore, to prevent damage to the cooktop panel supporting the cookware from occurring when the temperature sensing element detects a relatively low temperature area and fails to adjust the cooktop accordingly, microcrystalline glass with extremely high temperature resistance is typically used, significantly increasing production costs. Utility Model Content

[0003] The main purpose of this invention is to provide an electromagnetic cooking appliance that can improve temperature measurement sensitivity and reduce costs.

[0004] To achieve the above objectives, the electromagnetic cooking appliance proposed in this utility model includes:

[0005] Bottom shell;

[0006] A panel is located at the upper end of the bottom shell;

[0007] An electromagnetic heating device is installed inside the bottom shell. The electromagnetic heating device includes a mounting bracket and an electromagnetic coil mounted on the mounting bracket.

[0008] A magnetic structure is disposed below the electromagnetic coil, the magnetic structure comprising a plurality of magnetic strips extending radially along the electromagnetic coil and spaced apart circumferentially from the electromagnetic coil; and,

[0009] Multiple temperature measuring units, including multiple first temperature measuring units located above the electromagnetic coil and the magnetic strip, each of the first temperature measuring units being disposed above the corresponding magnet.

[0010] In one embodiment, the first temperature measuring unit is disposed at the middle position of the magnetic strip in its length direction.

[0011] In one embodiment, the electromagnetic cooking appliance further includes a plurality of connecting brackets mounted on the mounting bracket, the temperature measuring unit is mounted on the corresponding connecting bracket, and the temperature measuring unit is elastically abutting against the panel.

[0012] In one embodiment, the connecting bracket is configured as a silicone bracket.

[0013] In one embodiment, the plurality of connecting brackets includes a first connecting bracket for mounting the first temperature measuring unit. The first connecting bracket extends outward from the middle of the mounting bracket and has a first end and a second end that are arranged opposite to each other in its length direction. The first end of the first connecting bracket is mounted with the first temperature measuring unit, and the second end of the first connecting bracket is mounted on the outer periphery of the mounting bracket.

[0014] In one embodiment, the mounting bracket is provided with a slot;

[0015] The plurality of connecting brackets includes a first connecting bracket for mounting the first temperature measuring unit, the first connecting bracket being inserted into the slot.

[0016] In one embodiment, the plurality of temperature measuring units further includes a second temperature measuring unit installed in the middle of the mounting bracket.

[0017] In one embodiment, the panel comprises a borosilicate glass panel; and / or,

[0018] The temperature measuring unit includes a thermistor.

[0019] In one embodiment, a portion of the panel is light-transmitting, and the light-transmitting area of ​​the panel corresponds to the temperature measuring unit.

[0020] In one embodiment, the panel includes a borosilicate glass panel, and a light-shielding film layer is provided on the surface of the borosilicate glass panel in a region offset from the temperature measuring part, so that the area corresponding to the temperature measuring part forms the light-transmitting area.

[0021] In this invention, the electromagnetic heating device is housed within the bottom shell for heating a cookware placed on the panel. A magnetic structure is positioned below the electromagnetic coil, comprising multiple magnetic strips extending radially along the electromagnetic coil and spaced apart circumferentially. When the cookware is placed above the electromagnetic coil, the area at its bottom directly opposite the magnetic strips experiences the strongest magnetic field. During electromagnetic induction heating, the bottom of the cookware is located in the area with the strongest magnetic field, resulting in the highest temperature. By positioning the first temperature measuring unit above the magnetic strips, the highest temperature point on the panel can be detected. Based on the monitoring information, the operating state of the electromagnetic heating device can be adjusted promptly to avoid exceeding the panel's tolerance range. This eliminates the need for high-cost, high-temperature-resistant microcrystalline glass panels, thereby reducing the cost of the electromagnetic cooking appliance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 An exploded structural diagram of an embodiment of the electromagnetic cooking appliance provided by this utility model;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 for Figure 1 Cross-sectional schematic diagram of an electromagnetic cooking appliance;

[0026] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0027] Figure 5 for Figure 1 A partial structural diagram of an electromagnetic cooking appliance;

[0028] Figure 6 A schematic diagram of another embodiment of the panel of the electromagnetic cooking appliance provided by this utility model.

[0029] Explanation of icon numbers:

[0030] 100. Electromagnetic cooking appliance; 1. Bottom shell; 2. Panel; 2a. Light-transmitting area; 3. Electromagnetic heating device; 31. Mounting bracket; a. Slot; 4. Magnetic strip; 5. Temperature measuring part; 51. First temperature measuring part; 52. Second temperature measuring part; 6. Connecting bracket; 61. First connecting bracket.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Induction cookers currently widely employ single-point temperature measurement technology. However, due to limitations in their structural layout, the temperature detected by the temperature sensing element only reflects the temperature of a specific area of ​​the cooktop. This localized temperature is further affected by the temperature of the pot bottom. When the pot bottom is heated unevenly, the temperature measurement results may be inaccurate, making it impossible to precisely control the temperature during cooking. This often leads to poor cooking results for ingredients requiring strict temperature control. Furthermore, to prevent damage to the cooktop panel supporting the cookware from occurring when the temperature sensing element detects a relatively low temperature area and fails to adjust the cooktop accordingly, microcrystalline glass with extremely high temperature resistance is typically used, significantly increasing production costs.

[0036] This invention proposes an electromagnetic cooking appliance, aiming to provide an electromagnetic cooking appliance that can improve temperature measurement sensitivity and reduce costs.

[0037] Please see Figures 1 to 3In one embodiment of this utility model, the electromagnetic cooking appliance 100 includes a bottom shell 1, a panel 2, an electromagnetic heating device 3, a magnetic structure, and multiple temperature measuring parts 5. The panel 2 is disposed at the upper end of the bottom shell 1. The electromagnetic heating device 3 is installed inside the bottom shell 1 and includes a mounting bracket 31 and an electromagnetic coil mounted on the mounting bracket 31. The magnetic structure is disposed below the electromagnetic coil and includes multiple magnetic strips 4. The magnetic strips 4 extend radially along the electromagnetic coil and are spaced apart circumferentially on the electromagnetic coil. The multiple temperature measuring parts 5 include multiple first temperature measuring parts 51 located above the electromagnetic coil and the magnetic strips 4, and each first temperature measuring part 51 is located above the corresponding magnet.

[0038] It should be noted that during the heating process of an induction cooker, the magnetic field strength is usually strongest in the area directly above the magnetic strip 4 under the induction coil. This is because electromagnetic induction heating utilizes a changing magnetic field to generate eddy currents in a conductor, thus inducing heat generation. When the bottom of the cookware is directly opposite the magnetic strip 4 of the induction coil, the eddy current generation efficiency is highest, therefore the temperature in that area rises rapidly.

[0039] In this invention, the electromagnetic heating device 3 is disposed within the bottom shell 1 for heating a cookware placed on the panel 2. A magnetic structure is disposed below the electromagnetic coil, comprising multiple magnetic strips 4 extending radially along the electromagnetic coil and spaced apart circumferentially. When the cookware is placed above the electromagnetic coil, the area at its bottom directly opposite the magnetic strips 4 experiences the strongest magnetic field. During electromagnetic induction heating, the bottom of the cookware is located in the area with the strongest magnetic field, resulting in the highest temperature. By positioning the first temperature measuring unit 51 above the magnetic strips 4, the temperature of the panel 2 in this area can be detected, identifying the highest temperature point on the panel 2. Based on the monitoring information, the operating state of the electromagnetic heating device 3 can be adjusted in a timely manner to avoid exceeding the tolerance range of the panel 2. This eliminates the need for a high-cost, high-temperature resistant microcrystalline glass panel 2, thereby reducing the cost of the electromagnetic cooking appliance 100.

[0040] Furthermore, in this embodiment, the first temperature measuring unit 51 is correspondingly disposed at the middle position of the magnetic strip 4 in its length direction.

[0041] Because the central part of the magnetic strip 4 is the area with the strongest electromagnetic field, the magnetic field strength generated in this area is the greatest. Therefore, the electromagnetic induction effect at the bottom of the pot is the strongest, which can generate higher eddy currents, resulting in a higher temperature. Thus, setting the first temperature measuring unit 51 to the position corresponding to the highest temperature of the panel 2 can more accurately reflect the actual temperature change at the bottom of the pot.

[0042] By setting a temperature measuring unit 5 above the middle of each magnetic strip 4, multiple detection points of the cookware can be effectively detected to monitor temperature changes during the heating process, ensuring timely and accurate feedback on heat distribution during cooking, thereby achieving more precise temperature control.

[0043] Specifically, in this embodiment, the electromagnetic cooking appliance 100 further includes a plurality of connecting brackets 6 mounted on the mounting bracket 31, the temperature measuring part 5 is mounted on the corresponding connecting bracket 6, and the temperature measuring part 5 is elastically abutting against the panel 2.

[0044] "Elastic support" means that the temperature measuring part 5 can be installed on the connecting bracket 6 through an elastic element. The elastic element can be a spring, a rubber part, or a silicone part, etc. Of course, other possible structural settings can also be adopted. The specific settings can be determined according to the actual situation. This specification does not limit this embodiment.

[0045] Alternatively, the connecting bracket 6 itself can be elastic, allowing the temperature measuring part 5 to elastically support the panel 2.

[0046] By elastically abutting the temperature measuring part 5 against the panel 2, the temperature measuring part 5 can adapt to the slight changes of the panel 2 and always maintain a tight fit. This reduces the thermal resistance during heat conduction and ensures that heat can be quickly and effectively transferred to the temperature measuring part 5. As a result, the temperature measuring part 5 can sense the temperature changes of the panel 2 in real time and avoid temperature measurement errors caused by poor contact.

[0047] During the use of the electromagnetic cooking appliance 100, the panel 2 may expand due to heating or deform due to changes in the external environment. The temperature measuring part 5 elastically abuts against the panel 2, and the contact pressure between the temperature measuring part 5 and the panel 2 can be flexibly adjusted to ensure that the optimal contact state is always maintained.

[0048] Specifically, in this embodiment, the connecting bracket 6 is a silicone bracket.

[0049] Silicone material possesses excellent elasticity and flexibility, allowing it to adapt to various shapes and sizes. Furthermore, silicone is typically heat-resistant, making it suitable for use in high-temperature environments. By using silicone for the connecting bracket 6, sufficient support is provided, and the material's properties allow for elasticity, eliminating the need for additional springs or other elastic components, thus simplifying the structure and saving costs.

[0050] It should be noted that the connecting bracket 6 is used for mounting the temperature measuring unit 5. The multiple connecting brackets 6 can be configured with the same or different structural forms. The structure, quantity, and form of the connecting bracket 6 can be designed according to the actual mounting bracket 31 and the corresponding temperature measuring unit 5 at the location where the required temperature is to be measured.

[0051] Specifically, in this embodiment, the plurality of connecting brackets 6 includes a first connecting bracket 61 for mounting the first temperature measuring unit 51. The first connecting bracket 61 extends outward from the middle of the mounting bracket 31. The first connecting bracket 61 has a first end and a second end that are arranged opposite to each other in its length direction. The first end of the first connecting bracket 61 is equipped with the first temperature measuring unit 51, and the second end of the first connecting bracket 61 is installed on the outer periphery of the mounting bracket 31.

[0052] Because the first connecting bracket 61 extends outward from the middle of the mounting bracket 31 to form a cantilever design, the first temperature measuring part 51 can elastically contact the bottom of the upper panel 2 to improve the accuracy and sensitivity of the measurement.

[0053] The mounting bracket 31 is used to mount the electromagnetic coil, which is wound around the mounting bracket 31. Therefore, the mounting bracket 31 is provided with an annular (spiral) winding groove for the electromagnetic coil to be wound. A certain empty area is formed in the middle and outer edge regions of the mounting bracket 31. By mounting the second end of the first connecting bracket 61 on the outer periphery of the mounting bracket 31, a mounting position is provided for the first connecting bracket 61. Since the cookware usually heats best in the middle, placing the first temperature measuring part 51 in this position can effectively monitor the temperature change of the cookware. By setting the first temperature measuring part 51 at the first end of the first connecting bracket 61, the first temperature measuring part 51 can be placed at the required measurement position, thereby accurately corresponding to the bottom area of ​​the cookware.

[0054] It should also be noted that in the prior art, the temperature sensing element is set on the mounting bracket and positioned in the gap between the winding grooves. In order to ensure the stable installation of the temperature sensing element, the temperature sensing element will penetrate the mounting bracket of the winding spool. In order to avoid interference with the magnetic strip set below the mounting bracket, the temperature sensing element is usually set off from the magnetic strip.

[0055] By extending the first connecting bracket 61 outward from the middle of the mounting bracket 31, and inserting the second end of the first connecting bracket 61 into the periphery of the mounting bracket 31, the periphery of the mounting bracket 31 can be made thicker, resulting in a larger groove depth for the slot a. This allows the first connecting bracket 61 to be installed stably. This installation method does not interfere with the magnetic strip 4, while ensuring that the first temperature measuring unit 51 is positioned above the magnetic strip 4 at the location with the strongest magnetic field, thus improving detection accuracy.

[0056] Specifically, in this embodiment, the mounting bracket 31 is provided with a slot a; the plurality of connecting brackets 6 include a first connecting bracket 61 for mounting the first temperature measuring unit 51, and the first connecting bracket 61 is inserted into the slot a.

[0057] The first connecting bracket 61 is inserted into the slot a, so that the first temperature measuring part 51 can be stably and accurately positioned in the measuring position.

[0058] With this configuration, the first connecting bracket 61 can be easily inserted and fixed to the mounting bracket 31 without the need for complex tools or additional fasteners, thus improving the ease of installation and enabling quick disassembly and replacement of the first connecting bracket 61 during subsequent maintenance. Through the plug-in method, the first temperature measuring unit 51 can be adjusted or replaced as needed without affecting the integrity of the overall structure.

[0059] Furthermore, in order to further improve the accuracy of detection, in this embodiment, the plurality of temperature measuring units 5 also includes a second temperature measuring unit 52 installed in the middle of the mounting bracket 31.

[0060] Since the center of the mounting bracket 31 typically corresponds to the hot spot area, which is the main area where food or containers are placed, positioning the second temperature measuring unit 52 in the center of the electromagnetic heating device 3 facilitates concentrated measurement of the temperature in the central area. This allows for the acquisition of temperature data for that area, thus enabling better detection of the cookware's temperature.

[0061] Specifically, in this embodiment, the panel 2 includes a borosilicate glass panel 2.

[0062] It should be noted that borosilicate glass is a type of glass containing boron oxide (B2O3). High borosilicate glass has excellent high-temperature resistance and can withstand temperature changes. Its surface is smooth, easy to clean, and oil and food residue do not easily adhere to it.

[0063] In related technologies, panel 2 uses microcrystalline glass, but the production and raw material costs of microcrystalline glass are relatively high. High borosilicate glass has good performance, but when the cookware experiences abnormally uneven and continuous heating, high borosilicate glass has a slightly higher risk of breakage than microcrystalline glass panel 2, therefore its cost is relatively lower.

[0064] By setting multiple temperature measuring units 5, abnormal conditions of the cookware can be detected in a timely manner, thus avoiding the continuous generation of abnormally high temperatures on the panel 2. Therefore, the use of high borosilicate glass material can greatly reduce production costs.

[0065] In this embodiment, the temperature measuring unit 5 includes a thermistor.

[0066] It should be noted that the resistance of a thermistor changes significantly with temperature. Thermistors include NTC (negative temperature coefficient) thermistors and PTC (positive temperature coefficient) thermistors. By measuring the resistance of a thermistor, the current temperature can be indirectly calculated.

[0067] Because the thermistor is highly sensitive to temperature changes, it provides higher measurement accuracy within a specific temperature range compared to other temperature sensors, making it suitable for cooking scenarios involving frying, boiling, and stir-frying. The thermistor is small in size and easily integrated into the mounting bracket 31, without occupying excessive space. Therefore, choosing the thermistor as the temperature sensing element is suitable for the application scenarios and structural characteristics of the electromagnetic cooking appliance 100.

[0068] Furthermore, in some embodiments, a portion of the panel 2 is light-transmitting, and the light-transmitting area 2a of the panel 2 corresponds to the temperature measuring unit 5.

[0069] A portion of the panel 2 is light-transmitting. This can be achieved by placing a transparent or semi-transparent material (such as glass or plastic) at the location corresponding to the temperature measuring part 5, allowing light to pass through. Alternatively, a light-blocking film can be placed on the transparent panel 2, leaving the area corresponding to the temperature measuring part 5 blank.

[0070] Thus, by aligning the light-transmitting area 2a with the temperature measuring unit 5, the user can directly observe the measuring point of the temperature measuring unit 5. This provides visual feedback, allowing the user to clearly see the position of the temperature measuring unit 5, achieving an externalized display of the temperature measuring point and enhancing the user-friendliness and interactivity of the electromagnetic cooking appliance 100.

[0071] Specifically, in one embodiment, the panel 2 includes a borosilicate glass panel 2, and a light-shielding film layer is provided on the surface of the borosilicate glass panel 2 in a region offset from the temperature measuring part 5, so that the area corresponding to the temperature measuring part 5 forms the light-transmitting area.

[0072] Because the panel 2 is made of high borosilicate glass, it has good transparency. The light-shielding film layer can be printed ink, or it can be formed by pasting an opaque film layer.

[0073] Printing ink in a suitable area on the panel 2 can cover a large area of ​​the internal components of the induction cooker, enhancing the aesthetics of the induction cooking appliance 100, and can also add functional markings, such as buttons, indicator lights, and temperature scales on the control panel 2, in a suitable area.

[0074] By not providing the light-shielding film in the area corresponding to the temperature measuring part 5 on the panel 2, a light-transmitting area is formed, allowing light to pass through. This enables the user to clearly observe the working status or measurement point of the temperature measuring part 5. The structure is simple and the design is flexible. The ink printing area can be flexibly adjusted according to the location of the temperature measuring part 5, which is convenient for production.

[0075] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electromagnetic cooking appliance, characterized in that, include: Bottom shell; A panel is located at the upper end of the bottom shell; An electromagnetic heating device is installed inside the bottom shell. The electromagnetic heating device includes a mounting bracket and an electromagnetic coil mounted on the mounting bracket. A magnetic structure is disposed below the electromagnetic coil, the magnetic structure comprising a plurality of magnetic strips extending radially along the electromagnetic coil and spaced apart circumferentially from the electromagnetic coil; and, Multiple temperature measuring units, including multiple first temperature measuring units located above the electromagnetic coil and the magnetic strip, each of the first temperature measuring units being disposed above the corresponding magnet.

2. The electromagnetic cooking appliance as described in claim 1, characterized in that, The first temperature measuring part is correspondingly located at the middle position of the magnetic strip along its length.

3. The electromagnetic cooking appliance as described in claim 1, characterized in that, The electromagnetic cooking appliance also includes multiple connecting brackets mounted on the mounting bracket, and the temperature measuring unit is mounted on the corresponding connecting bracket, with the temperature measuring unit elastically abutting against the panel.

4. The electromagnetic cooking appliance as described in claim 3, characterized in that, The connecting bracket is a silicone bracket.

5. The electromagnetic cooking appliance as described in claim 3, characterized in that, The plurality of connecting brackets includes a first connecting bracket for mounting the first temperature measuring unit. The first connecting bracket extends outward from the middle of the mounting bracket. The first connecting bracket has a first end and a second end that are arranged opposite to each other in its length direction. The first end of the first connecting bracket is mounted with the first temperature measuring unit, and the second end of the first connecting bracket is mounted on the outer periphery of the mounting bracket.

6. The electromagnetic cooking appliance as described in claim 3, characterized in that, The mounting bracket is provided with a slot; The plurality of connecting brackets includes a first connecting bracket for mounting the first temperature measuring unit, the first connecting bracket being inserted into the slot.

7. The electromagnetic cooking appliance as described in claim 1, characterized in that, The plurality of temperature measuring units also includes a second temperature measuring unit installed in the middle of the mounting bracket.

8. The electromagnetic cooking appliance as described in claim 1, characterized in that, The panel includes a borosilicate glass panel; and / or, The temperature measuring unit includes a thermistor.

9. The electromagnetic cooking appliance as described in claim 1, characterized in that, A portion of the panel is light-transmitting, and the light-transmitting area of ​​the panel corresponds to the temperature measuring unit.

10. The electromagnetic cooking appliance as described in claim 9, characterized in that, The panel includes a high borosilicate glass panel, and a light-shielding film layer is provided on the surface of the high borosilicate glass panel in a region offset from the temperature measuring part, so that the area corresponding to the temperature measuring part forms the light-transmitting area.

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