Cooking utensil

Abstract

The utility model provides a cooking utensil, and relates to the technical field of household appliances. The cooking utensil comprises a shell, a circuit board is arranged in the shell, and the shell is provided with a mounting opening; a panel; the furnace plate assembly is arranged in the shell; the furnace plate assembly and the heating area are correspondingly arranged; the electromagnetic coil is arranged in the shell; an oscillating circuit and a detection circuit are integrated on the circuit board, and the two ends of the electromagnetic coil are electrically connected with the oscillating circuit to form a closed loop; the oscillation circuit is configured to change the amplitude according to the magnetic flux change of the alternating magnetic field; the detection circuit is electrically connected with the oscillation circuit, and the detection circuit is configured to detect the amplitude of the oscillation circuit. The two ends of the electromagnetic coil are connected with the circuit board to form the closed loop, so that cookware detection is achieved through the magnetic flux change, the phenomenon that misjudgment is likely to be generated when a user touches the cookware is avoided, the detection precision of the presence or absence of the cookware is improved to the maximum degree, the safety performance of the cooking utensil is improved, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a cooking appliance. Background Art

[0002] Cooking utensils are utensils widely used in daily life for cooking. For example, a ceramic stove consists of a heating element and a panel. The heating element is located beneath the panel, generating heat that heats pots and pans placed on the panel. Because the panel's surface temperature reaches approximately 600°C when the stove is heating, operating the stove without a pot on the panel can lead to wasted energy and even pose safety risks.

[0003] Therefore, ceramic hobs need to be equipped with a pot-free detection function. Related technologies utilize the principle of inductive touch switches. Specifically, when a conductive object approaches an inductive coil, the capacitance formed by the conductive object and the ground becomes parallel to the capacitance formed by the inductive coil and the ground, increasing the total capacitance. A detection circuit detects this change in capacitance and can then identify whether a pot is on the panel.

[0004] However, in the above detection method, when a human body approaches the panel of the ceramic stove, it will also cause a change in the total inductive capacitance, which is prone to misjudgment and has low detection accuracy. Utility Model Content

[0005] The present application provides a cooking utensil that helps avoid the phenomenon of misjudgment when the user touches it, maximizes the detection accuracy of whether there is a pot or not, improves the safety performance of the cooking utensil, and enhances the user experience.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a cooking appliance, comprising: a shell, a circuit board is provided in the shell, and the shell has a mounting opening; a panel, the panel is arranged at the mounting opening, and the panel is provided with a heating zone; a stove plate assembly, the stove plate assembly is arranged in the shell; the stove plate assembly is arranged corresponding to the heating zone and is electrically connected to the circuit board; an electromagnetic coil, the electromagnetic coil is provided in the shell; an oscillation circuit and a detection circuit are integrated on the circuit board, and two ends of the electromagnetic coil are electrically connected to the oscillation circuit respectively to form a closed loop; the oscillation circuit is configured to change the amplitude according to the change of the magnetic flux of the alternating magnetic field; the detection circuit is electrically connected to the oscillation circuit, and the detection circuit is configured to detect the amplitude of the oscillation circuit.

[0008] The cooking utensil provided by this application has an electromagnetic coil with both ends connected to a circuit board to form a closed loop. When the electromagnetic coil is energized, it forms an alternating magnetic field, causing a change in magnetic flux when a metal pot is placed on the panel. Thus, this application detects the presence of a pot on the panel by detecting changes in amplitude, thereby detecting metal pots. This helps avoid the problem of the related art where only one end of the induction coil is connected to the circuit board, and the open-loop detection method is easily affected by the user approaching or touching the panel. This reduces the phenomenon of misjudgment, maximizes the detection accuracy of whether a pot is present, improves the safety performance of the cooking utensil, and enhances the user experience.

[0009] In a possible implementation, an output circuit is integrated on the circuit board, the output circuit is electrically connected to the detection circuit, and the output circuit is configured to output a control signal.

[0010] In this way, it is suitable for the rapid and effective identification of metal cookware, can effectively shield the influence of the human body on the detection, reduce misjudgment, and has high detection accuracy.

[0011] In one possible implementation, the stove plate assembly includes a stove plate body and a heating element, wherein the heating element is connected to the stove plate body; the heating element is arranged corresponding to the heating zone, and the heating element is electrically connected to the circuit board; the electromagnetic coil is arranged on a side of the stove plate body close to the panel.

[0012] In this way, when the cookware is placed in the heating zone, the electromagnetic coil is closer to the cookware, which helps to reduce interference between the cookware and the electromagnetic coil, thereby helping to improve the detection accuracy of the cookware.

[0013] In a possible implementation, the electromagnetic coil is disposed around a circumferential edge of the hob body, and the heating element is located inside the area surrounded by the electromagnetic coil.

[0014] In this way, the electromagnetic coil can have a larger diameter, which can effectively identify the pot and also help detect pots with larger diameters, thereby maximizing the detection accuracy of whether there is a pot or not. It has a wide range of applications and high detection accuracy.

[0015] In a possible implementation, the electromagnetic coil is arranged concentrically with the hob body.

[0016] In this way, when the pot is placed opposite to the main body of the stove, it is easier to cause changes in the alternating magnetic field, which is more sensitive and helps to ensure detection accuracy.

[0017] In a possible implementation, the cooking appliance includes a coil support, which is arranged around a circumferential edge of the hob body. The coil support is provided with a groove around its circumference, and the electromagnetic coil is wound in the groove.

[0018] In this way, the electromagnetic coil is fixed to the stove body through the coil bracket. In addition, since the groove is provided on the circumferential edge of the coil bracket, the electromagnetic coil is located outside the heating element. That is to say, along the thickness direction of the panel, the orthographic projection of the electromagnetic coil is located outside the orthographic projection of the heating element, which helps to reduce the influence of the heat generated by the heating element during the heating process on the electromagnetic coil.

[0019] In a possible implementation, the number of turns of the electromagnetic coil wound along the groove is 3 to 6.

[0020] In this way, on the one hand, it helps to avoid the situation where the number of turns of the electromagnetic coil is too small and may not provide sufficient inductance, resulting in low detection accuracy and poor detection effect, affecting cooking results and user experience; on the other hand, it helps to avoid the situation where the number of turns of the electromagnetic coil is too large and may cause increased costs, and more complex design and manufacturing, which is not conducive to product popularization and cost control.

[0021] In one possible implementation, the coil bracket is provided with a first wire threading hole and a second wire threading hole, the first end of the electromagnetic coil is passed through the first wire threading hole and is electrically connected to the circuit board; the second end of the electromagnetic coil is passed through the second wire threading hole and is electrically connected to the circuit board.

[0022] In this way, the electromagnetic coil can be fixed and led out, and it helps to ensure that both ends of the electromagnetic coil are respectively connected to the circuit board to form a closed loop.

[0023] In one possible implementation, the cooking appliance includes an elastic member, a portion of which is located between the hob assembly and the coil support, and the elastic member is configured to apply a force toward the panel to the coil support so that the coil support abuts the panel.

[0024] In this way, the elastic member can provide a force for the coil bracket to abut against the panel, so that the electromagnetic coil can be close to the panel, thereby maximizing the accuracy of the electromagnetic coil in detecting whether there is a cookware on the panel.

[0025] In a possible implementation, the electromagnetic coil includes a wire core and an insulating layer, the insulating layer is wrapped around the outside of the wire core, and both ends of the wire core are electrically connected to the circuit board respectively.

[0026] In this way, the electromagnetic coil is electrically connected to the circuit board through the wire core to form a closed loop. In addition, the insulating layer can reduce the electric field interference generated by the heating element on the electromagnetic coil, enhance the durability and stability of the electromagnetic coil, and extend the service life of the electromagnetic coil, thereby maximizing the accuracy of detecting whether there is a pot on the panel.

[0027] The cooking utensil provided by this application is configured with an electromagnetic coil connected to a circuit board at both ends to form a closed loop. When the electromagnetic coil is energized, it generates an alternating magnetic field, causing a change in magnetic flux when a metal pot is placed on the panel. Thus, this application detects the presence of a pot on the panel by detecting changes in amplitude, thereby enabling detection of metal pots. This helps avoid the problem of the related art where only one end of the induction coil is connected to the circuit board, and the open-loop detection method is easily affected by the user's proximity, thereby avoiding the phenomenon of misjudgment when the user touches the panel. This maximizes the accuracy of detecting whether a pot is present, improves the safety performance of the cooking utensil, and enhances the user experience.

[0028] The structure of the present application and its other application objectives and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a cooking utensil provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the top view of the cooking utensil provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the internal structure of a cooking appliance provided in an embodiment of the present application;

[0033] Figure 4 A cross-sectional view of a cooking utensil provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of a closed-loop detection solution for an electromagnetic coil provided in an embodiment of the present application;

[0035] Figure 6 A schematic diagram of the closed-loop detection principle of the electromagnetic coil provided in an embodiment of the present application;

[0036] Figure 7 An exploded schematic diagram of a cooking utensil provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of the assembly structure of a cooking plate assembly, an electromagnetic coil, and a coil support of a cooking appliance provided in an embodiment of the present application;

[0038] Figure 9A schematic structural diagram of a coil support for a cooking utensil provided in an embodiment of the present application;

[0039] Figure 10 for Figure 9 A partial enlarged schematic diagram of part I;

[0040] Figure 11 A front view of a coil support of a cooking utensil provided in an embodiment of the present application;

[0041] Figure 12 for Figure 11 A partial enlarged schematic diagram of part II;

[0042] Figure 13 A schematic structural diagram of a stove assembly of a cooking appliance provided in an embodiment of the present application;

[0043] Figure 14 for Figure 13 A partial enlarged schematic diagram of part III.

[0044] Description of reference numerals:

[0045] 100-cooking utensils;

[0046] 110-housing; 111-mounting port; 120-panel;

[0047] 121-heating zone; 130-hob assembly; 131-hob body;

[0048] 132-heating element; 140-circuit board; 150-electromagnetic coil;

[0049] 151-wire core; 152-insulation layer; 160-coil support;

[0050] 161-groove; 162-limiting blind hole; 163-first threading hole;

[0051] 164 - second threading hole; 170 - elastic member; 171 - first elastic member;

[0052] 172-second elastic member; 180-temperature limiter; 200-cooker. DETAILED DESCRIPTION

[0053] Some current electric ceramic stove products do not have a pot-free detection function, which makes dry burning very likely to occur during use, posing a major safety hazard. Some products are equipped with an induction pot-free detection function, which uses an induction coil without a closed loop to achieve pot-free detection.

[0054] The current principle of pot-free detection is that any conductive object has an inductive capacitance. An induction coil and the ground form an inductive capacitance. Under constant ambient conditions, this capacitance remains constant and small. However, when a conductive object approaches the induction coil, the capacitance formed by the object and the ground becomes parallel to the capacitance formed by the induction coil and the ground, increasing the total capacitance. The detection circuit detects this change in capacitance along the induction path and can then determine whether a pot is on the panel.

[0055] However, the above-mentioned method of determining the presence of a cookware by detecting capacitance is open-loop because only one end of the induction coil is connected to the circuit board and the induction coil is not closed. However, during the detection process, since the human body can be considered a conductor with a certain capacitance, the total induced capacitance will change when the human body approaches or touches the panel, which can easily affect the detection, leading to false positives and low detection accuracy.

[0056] Based on the above technical problems, an embodiment of the present application provides a cooking utensil in which both ends of an electromagnetic coil are connected to a circuit board to form a closed loop. When the electromagnetic coil is energized, an alternating magnetic field is generated, causing a change in magnetic flux when a metal pot is placed on the panel. In this way, the present application detects the presence of a pot on the panel by detecting changes in amplitude, thereby detecting metal pots. This helps avoid the problem of the related art where only one end of the induction coil is connected to the circuit board and the open-loop detection method is easily affected by the user's proximity, thereby avoiding the phenomenon of misjudgment when the user touches the device. This maximizes the accuracy of detecting whether a pot is present or not, improves the safety performance of the cooking utensil, and enhances the user experience.

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0058] This embodiment of the present application provides a cooking appliance 100, including but not limited to an induction cooker and a ceramic cooker. In this embodiment, the ceramic cooker is used as an example of the cooking appliance 100. A pot is placed on the ceramic cooker, which is used to cook the ingredients in the pot.

[0059] Reference Figures 1 to 4As shown, the cooking appliance 100 may include a housing 110 and a panel 120. The housing 110 has a mounting opening 111, and the panel 120 is disposed at the mounting opening 111. The panel 120 is used to carry the pot 200. Figure 2 As shown, a heating area 121 may be provided on the panel 120 , and when the user places the cookware 200 on the heating area 121 , the cookware 200 may be heated.

[0060] In an embodiment of the present application, the material of the shell 110 can be polypropylene (PP), polybutylene terephthalate (PBT), polyester resin (PET), nylon 6 (PA6), nylon 66 (PA66) or polyphenylene sulfide (PPS) with a temperature resistance greater than 125 degrees, or the material of the shell 110 can be PP, PBT, PET, PA6, PA66 or PPS plus glass fiber.

[0061] In the embodiment of the present application, the panel 120 can be made of a high-temperature resistant non-metallic material, such as a borosilicate glass panel, a ceramic panel, and a glass-ceramic panel. This embodiment does not limit this, and the specific material can be selected according to actual needs.

[0062] Reference Figure 3 and Figure 4 As shown, a circuit board 140, a stove plate assembly 130 and an electromagnetic coil 150 are provided in the shell 110. The stove plate assembly 130 may include a stove plate body 131 and a heating element 132. The heating element 132 is connected to the stove plate body 131; the heating element 132 is arranged corresponding to the heating zone 121, and the heating element 132 is electrically connected to the circuit board 140.

[0063] In the embodiment of the present application, when the cooking appliance 100 is an induction cooker, the heating element 132 is a coil disk; when the cooking appliance 100 is an electric ceramic cooker, the heating element 132 is an electric ceramic plate. In this embodiment, the heating element 132 is mainly described as an electric ceramic plate.

[0064] In the embodiment of the present application, the connection method between the heating element 132 and the hob body 131 is not limited. For example, the hob body 131 may include a bottom wall and side walls connected to each other. The heating element 132 may be disposed on the bottom wall of the hob body 131. The side walls of the hob body 131 may be arranged to form a closed annular structure, forming a receiving cavity with the bottom wall. This helps to enhance the protection of the heating element 132. This embodiment is not limited to this.

[0065] In the embodiment of the present application, the heating element 132 is arranged to correspond to the heating zone 121. In this way, when the cookware 200 is placed in the heating zone 121, the circuit board 140 can control the heating element 132 to start heating. The heating element 132 can be aimed at the cookware 200 to heat it, so that the heat can be concentrated in the cookware 200, thereby avoiding energy consumption caused by heat loss.

[0066] In the embodiment of the present application, the electromagnetic coil 150 can be disposed on the side of the hob body 131 close to the panel 120. The assembly method between the electromagnetic coil 150 and the hob body 131 is not limited and can be configured according to actual needs. Furthermore, by placing the electromagnetic coil 150 close to the panel 120, when the pot 200 is placed in the heating zone 121, the pot 200 and the electromagnetic coil 150 are closer together, which helps reduce interference between the pot 200 and the electromagnetic coil 150 and improves the accuracy of pot 200 detection.

[0067] To address the problem in related art where only one end of the induction coil is connected to the circuit board, resulting in open-loop detection that is susceptible to being affected by a user approaching or touching the panel, in this embodiment of the present application, the circuit board 140 may be provided with an oscillation circuit and a detection circuit, with both ends of the electromagnetic coil 150 electrically connected to the oscillation circuit to form a closed loop. The oscillation circuit is configured to change its amplitude based on changes in the magnetic flux of the alternating magnetic field, and the detection circuit is electrically connected to the oscillation circuit and configured to detect the amplitude of the oscillation circuit.

[0068] An oscillating circuit is an energy conversion device that converts direct current (DC) into alternating current (AC) at a specific frequency. The resulting circuit is called an oscillating circuit. When electromagnetic coil 150 is energized, the oscillating circuit generates an alternating magnetic field. When a pot approaches, an induced current is generated at the bottom of the pot. This induced current impedes the change in the original magnetic flux, causing the amplitude of the oscillating circuit to change. This change in the oscillating circuit's amplitude is then used to determine whether a pot is present on identification panel 120.

[0069] The detection circuit is used to detect the amplitude of the oscillation circuit to ensure its stable operation. Based on changes in the detected amplitude, the detection circuit determines whether a pot is present on panel 120 and provides an indication or outputs a control signal via the output circuit. For example, if the oscillation weakens or even stops, it indicates that a pot is present on panel 120; if the oscillation remains unchanged, it indicates that no pot is present on panel 120.

[0070] In the embodiment of the present application, the two ends of the electromagnetic coil 150 are electrically connected to the circuit board 140, so that the electromagnetic coil 150 forms a closed loop. Thus, compared with the open-loop detection method of the related art, the closed-loop detection method of the present application forms an alternating magnetic field when the electromagnetic coil 150 is energized. The metal pot 200 that approaches or enters this magnetic field will generate an induced current in the metal. According to Faraday's electromagnetic induction theorem, the magnetic field of the induced current hinders the change of the original magnetic flux, that is, it causes the magnetic flux to change, thereby determining whether the pot 200 is placed on the heating zone 121 and detecting the presence of the pot 200. In addition, because the electromagnetic coil 150 of the present application forms a closed loop, compared with the induction coil of the related art that is not closed, the present application helps to shield the influence of the human body approaching, reduce false positives, and maximize the detection accuracy of the presence of the pot 200.

[0071] It should be noted that the detection principle of this application is only effective for conductive objects such as metal pots. In addition, compared with the capacitive touch principle in related technologies, the detection principle of this application can distinguish between metal pots and human hands or wet cloths, thereby effectively reducing false positives.

[0072] Therefore, the cooking utensil provided in this embodiment detects whether there is a pot on the panel by detecting the change in amplitude, thereby realizing the detection of metal pots. This helps to avoid the situation in the related art where only one end of the induction coil is connected to the circuit board, and the open-loop detection method is easily affected by the user approaching or touching the panel, thereby reducing the phenomenon of misjudgment, maximizing the detection accuracy of whether there is a pot or not, improving the safety performance of the cooking utensil 100, and enhancing the user experience.

[0073] In a possible implementation, the circuit board 140 may be provided with an output circuit, the output circuit being electrically connected to the detection circuit, and the output circuit being configured to output a control signal.

[0074] In the embodiment of the present application, the oscillation circuit, the detection circuit and the output circuit may be hardware integrated on the circuit board 140. Therein, there is no limitation on the control signal output by the output circuit. For example, if there is a pot on the identification panel 120, the output control signal may be a corresponding indicator light or buzzer, and the user may unlock the heating function of the heating element 132 through a program according to the above signal; or the user may manually select a function to start heating. On the contrary, if there is no pot on the identification panel 120, the output control signal may be a corresponding indicator light or buzzer, and the user may temporarily pause or stop heating according to the above signal. It should be noted that in this embodiment, there is no limitation on the output control signal, and it may be specifically set according to actual conditions.

[0075] In the present application, refer to Figure 5 and Figure 6As shown, the working principles of the oscillation circuit, detection circuit and output circuit are as follows: after the oscillation circuit is connected to the electromagnetic coil 150, it works according to the principle of electromagnetic induction, and the change of magnetic flux is reflected in the change of current in the electromagnetic coil 150, which leads to the change of magnetic field strength.

[0076] Specifically, when electromagnetic coil 150 is energized, the signal current generated by the oscillation circuit passes through electromagnetic coil 150, causing it to generate an alternating magnetic field. This is the process of converting electrical energy into magnetic field energy. When no pot 200 is nearby, the amplitude of the oscillation circuit remains stable and periodically alternating. When a metal pot approaches the electromagnetic field, it cuts through the magnetic field lines, generating eddy currents at the bottom of the pot. These eddy currents, in turn, generate a magnetic field. This magnetic field hinders the change in the original magnetic flux, thereby affecting the oscillation period of the oscillation circuit. The detection circuit on the circuit board can detect the change in the oscillation circuit's amplitude, thereby identifying the presence of a pot on panel 120 based on this change in amplitude and providing an indication and feedback signal through the output circuit.

[0077] In one possible implementation, referring to Figure 7 and Figure 8 As shown, the electromagnetic coil 150 is arranged around the circumferential edge of the hob body 131 , and the heating element 132 is located inside the area surrounded by the electromagnetic coil 150 .

[0078] This allows electromagnetic coil 150 to have a larger diameter, effectively identifying pots 200 and facilitating detection of larger pots 200. This maximizes the accuracy of pot detection, ensuring a wide range of applications and high detection accuracy. Furthermore, placing electromagnetic coil 150 around the circumferential edge of hob body 131 also helps reduce electromagnetic interference from heating element 132 on electromagnetic coil 150.

[0079] It should be noted that, in this embodiment, there is no limitation on the diameters of the cookware 200 and the electromagnetic coil 150. Figure 11 As shown, the diameter of the electromagnetic coil 150 may be M, and the minimum diameter of the pot 200 that can be recognized by the electromagnetic coil 150 may be M-10 mm.

[0080] This limitation is because if the diameter of the pot 200 is larger than the diameter of the electromagnetic coil 150, the pot 200 can be well detected; if the diameter of the pot 200 is smaller than the diameter of the electromagnetic coil 150, and the difference between the two is greater than 10 mm, the electromagnetic coil 150 cannot effectively identify the pot 200 with a smaller diameter.

[0081] Therefore, the diameter of the pot 200 is limited to be smaller than the diameter of the electromagnetic coil 150, and the difference between the two is less than 10 mm. This helps to identify the pot 200 to the greatest extent, and helps to identify pots 200 of different diameters, thereby improving detection accuracy.

[0082] In one possible implementation, referring to Figure 7 and Figure 8 As shown, the electromagnetic coil 150 and the hob body 131 can be concentrically arranged. It is understood that concentric arrangement means that the electromagnetic coil 150 and the hob body 131 have the same center, but different radii.

[0083] It should be noted that if the electromagnetic coil 150 is staggered with the stove main body 131, when the pot 200 is placed in the position corresponding to the heating element 132, the pot 200 and the electromagnetic coil 150 will be staggered, which will easily affect the electromagnetic coil 150's detection effect on the pot 200. Therefore, in the embodiment of the present application, the electromagnetic coil 150 is set concentrically with the stove main body 131. This ensures that when the pot 200 is placed in the heating zone 121 on the panel 120 opposite the heating element 132, the electromagnetic coil 150 can accurately sense whether the pot 200 is placed in the heating zone 121. At the same time, it is easier to cause changes in the alternating magnetic field, resulting in higher sensitivity, which helps to ensure detection accuracy.

[0084] In one possible implementation, referring to Figures 7 to 9 As shown, the cooking appliance 100 may include a coil support 160, which is arranged around the circumferential edge of the hob body 131. In this way, the coil support 160 is easily installed and the normal operation of the heating element 132 is not affected.

[0085] There is no limitation on the installation method of the coil support 160 and the furnace plate body 131. Figure 9 As shown, the coil support 160 may be provided with a plurality of limiting blind holes 162, and the coil support 160 is connected to the furnace plate body 131 through the limiting blind holes 162. This embodiment does not limit this.

[0086] In the present application, refer to Figure 11 and Figure 12 As shown, the coil support 160 may be provided with a groove 161 surrounding the circumference thereof, and the electromagnetic coil 150 is wound in the groove 161. The winding method of the electromagnetic coil 150 is not limited. For example, the wire may be wound in the groove 161 in a clockwise or counterclockwise direction to form the electromagnetic coil 150.

[0087] Among them, in this embodiment, referring to Figure 11 and Figure 12As shown, the groove 161 is opened on the circumferential edge of the coil bracket 160, so that the electromagnetic coil 150 is located on the outside of the heating element 132. That is, along the thickness direction of the panel 120, the positive projection of the electromagnetic coil 150 is located outside the positive projection of the heating element 132, which helps to reduce the impact of the heat generated by the heating element 132 during the heating process on the electromagnetic coil 150.

[0088] In one possible implementation, the number of turns of the electromagnetic coil 150 wound along the groove 161 may be 3 to 6. In this embodiment, the number of turns of the electromagnetic coil 150 wound along the groove 161 is not limited. For example, the number of turns of the electromagnetic coil 150 wound along the groove 161 may be 3, 4, 5, 6, or any number between 3 and 6, which is not limited in this embodiment. The specific winding method can be determined according to actual needs.

[0089] In this way, on the one hand, it helps to avoid the situation where the number of turns of the electromagnetic coil 150 is too small and may not provide sufficient inductance, resulting in lower detection accuracy and poor detection effect, affecting the cooking effect and user experience; on the other hand, it helps to avoid the situation where the number of turns of the electromagnetic coil 150 is too large and may cause increased costs, and more complex design and manufacturing, which is not conducive to product popularization and cost control.

[0090] In one possible implementation, refer to Figure 9 and Figure 10 As shown, the coil bracket 160 can be provided with a first threading hole 163 and a second threading hole 164, the first end of the electromagnetic coil 150 is passed through the first threading hole 163 and electrically connected to the circuit board 140; the second end of the electromagnetic coil 150 is passed through the second threading hole 164 and electrically connected to the circuit board 140.

[0091] In this way, the first threading hole 163 can fix and lead out the first end of the electromagnetic coil 150, and the second threading hole 164 can fix and lead out the second end of the electromagnetic coil 150, which helps to ensure that the two ends of the electromagnetic coil 150 are respectively connected to the circuit board 140 to form a closed loop; in addition, through appropriate threading hole connections, the capacitive coupling between signals can be reduced, the mutual interference between different signals can be reduced, and the safety performance of the circuit can be improved; in some applications, the threading holes help distribute heat and prevent local overheating of the circuit board 140, thereby improving the reliability and service life of the circuit.

[0092] In one possible implementation, refer to Figure 7 and Figure 8As shown, the cooking appliance 100 may include an elastic member 170 , a portion of which is located between the hob assembly 130 and the coil support 160 , and the elastic member 170 is configured to apply a force toward the panel 120 to the coil support 160 so that the coil support 160 abuts against the panel 120 .

[0093] In an embodiment of the present application, the elastic member 170 may include a first elastic member 171. Along the thickness direction of the shell 110, the first elastic member 171 may be located between the stove plate assembly 130 and the coil bracket 160. The first elastic member 171 applies a force toward the panel 120 to the coil bracket 160 so that the coil bracket 160 abuts against the panel 120.

[0094] In this way, under the elastic force of the first elastic member 171, the coil bracket 160 can be provided with a force to abut against the panel 120, so that the electromagnetic coil 150 can be close to the direction of the panel 120, thereby maximizing the accuracy of the electromagnetic coil 150 in detecting whether there is a cookware 200 on the panel 120.

[0095] In order to further ensure that the electromagnetic coil 150 can be close to the direction of the panel 120, in an embodiment of the present application, the elastic member 170 may also include a second elastic member 172. Along the thickness direction of the shell 110, the second elastic member 172 can be located between the stove plate assembly 130 and the bottom wall of the shell 110 to provide a force on the stove plate assembly 130 toward the panel 120.

[0096] Specifically, one end of the second elastic member 172 can abut against the housing 110, and the other end can abut against the hob body 131. After the cooking appliance 100 is installed, the second elastic member 172 elastically deforms under the forces acting on the hob assembly 130 and the housing 110. Accordingly, the second elastic member 172 can exert a reaction force on the hob assembly 130 and the housing 110, forcing the heating element 132 of the hob assembly 130 closer to the panel 120, thereby maintaining the heating efficiency of the cooking appliance 100. Furthermore, the second elastic member 172 exerts a force on the hob assembly 130 toward the panel 120. When the hob assembly 130 approaches the panel 120, it can also drive the electromagnetic coil 150 on the hob assembly 130 to move synchronously, bringing the electromagnetic coil 150 closer to the panel 120, thereby improving the accuracy of detecting the presence of the pot 200 on the panel 120.

[0097] For example, the first elastic member 171 and the second elastic member 172 in this embodiment can be springs, which is not limited in this embodiment. In addition, the number and distribution of the first elastic member 171 and the second elastic member 172 are not limited and can be set according to actual needs.

[0098] In one possible implementation, referring to Figure 13 and Figure 14 As shown, the electromagnetic coil 150 may include a core 151 and an insulating layer 152 . The insulating layer 152 is wrapped around the outside of the core 151 . Both ends of the core 151 are electrically connected to the circuit board 140 .

[0099] In this way, the electromagnetic coil 150 is electrically connected to the circuit board 140 through the wire core 151 to form a closed loop. In addition, by wrapping the insulating layer 152 on the outside of the wire core 151, the insulating layer 152 can reduce the electric field interference generated by the heating element 132 on the electromagnetic coil 150, enhance the durability and stability of the electromagnetic coil 150, and extend the service life of the electromagnetic coil 150, thereby maximizing the accuracy of detecting whether there is a pot 200 on the detection panel 120.

[0100] In one possible implementation, referring to Figure 4 As shown, a temperature limiter 180 can be provided on the stove main body 131, wherein the temperature limiter 180 mainly controls the heating temperature through a temperature sensor and a control circuit. When the temperature of the heating element 132 exceeds the set value, the temperature sensor will send a signal to the control circuit, and the control circuit will transmit the signal to the power cord to turn on the power, and the heating element 132 will start heating again.

[0101] The cooking utensil provided by this application is configured with an electromagnetic coil connected to a circuit board at both ends to form a closed loop. When the electromagnetic coil is energized, it generates an alternating magnetic field, causing a change in magnetic flux when a metal pot is placed on the panel. Thus, this application detects the presence of a pot on the panel by detecting changes in amplitude, thereby enabling detection of metal pots. This helps avoid the problem of the related art where only one end of the induction coil is connected to the circuit board, and the open-loop detection method is easily affected by the user's proximity, thereby avoiding the phenomenon of misjudgment when the user touches the panel. This maximizes the accuracy of detecting whether a pot is present, improves the safety performance of the cooking utensil, and enhances the user experience.

[0102] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0103] In the description of this application, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0104] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooking utensil, characterized in that: include: A housing (110), wherein a circuit board (140) is provided in the housing (110), and the housing (110) has a mounting opening (111); A panel (120), the panel (120) being arranged at the installation opening (111), and the panel (120) being provided with a heating area (121); A stove plate assembly (130), the stove plate assembly (130) being disposed in the housing (110); the stove plate assembly (130) being disposed corresponding to the heating zone (121), and the stove plate assembly (130) being electrically connected to the circuit board (140); an electromagnetic coil (150), the electromagnetic coil (150) being disposed in the housing (110); An oscillation circuit and a detection circuit are integrated on the circuit board (140), and both ends of the electromagnetic coil (150) are electrically connected to the oscillation circuit to form a closed loop; the oscillation circuit is configured to change the amplitude according to the change of the magnetic flux of the alternating magnetic field; The detection circuit is electrically connected to the oscillation circuit, and is configured to detect an amplitude of the oscillation circuit.

2. The cooking appliance according to claim 1, wherein The circuit board (140) is integrated with an output circuit, the output circuit is electrically connected to the detection circuit, and the output circuit is configured to output a control signal.

3. The cooking appliance according to claim 1, wherein The stove plate assembly (130) comprises a stove plate body (131) and a heating element (132), wherein the heating element (132) is connected to the stove plate body (131); the heating element (132) is arranged corresponding to the heating zone (121), and the heating element (132) is electrically connected to the circuit board (140); The electromagnetic coil (150) is located on a side of the hob body (131) close to the panel (120).

4. The cooking appliance according to claim 3, wherein: The electromagnetic coil (150) is arranged around the circumferential edge of the furnace plate body (131), and the heating element (132) is located inside the area surrounded by the electromagnetic coil (150).

5. The cooking appliance according to claim 3, wherein: The electromagnetic coil (150) is arranged concentrically with the furnace plate body (131).

6. The cooking appliance according to any one of claims 3 to 5, characterized in that: The cooking appliance comprises a coil support (160), wherein the coil support (160) is arranged around the circumferential edge of the hob body (131), and the coil support (160) is provided with a groove (161) around the circumference thereof, and the electromagnetic coil (150) is wound in the groove (161).

7. The cooking appliance according to claim 6, characterized in that The number of turns of the electromagnetic coil (150) wound along the groove (161) is 3 to 6.

8. The cooking appliance according to claim 6, wherein The coil support (160) is provided with a first threading hole (163) and a second threading hole (164); the first end of the electromagnetic coil (150) is passed through the first threading hole (163) and is electrically connected to the circuit board (140); the second end of the electromagnetic coil (150) is passed through the second threading hole (164) and is electrically connected to the circuit board (140).

9. The cooking appliance according to claim 6, wherein The cooking appliance comprises an elastic member (170), a portion of which is located between the hob assembly (130) and the coil support (160), and the elastic member (170) is configured to apply a force toward the panel (120) to the coil support (160) so that the coil support (160) abuts against the panel (120).

10. The cooking utensil according to any one of claims 1 to 5, characterized in that: The electromagnetic coil (150) comprises a wire core (151) and an insulating layer (152), wherein the insulating layer (152) is wrapped around the outer side of the wire core (151), and both ends of the wire core (151) are electrically connected to the circuit board (140) respectively.

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