Electromagnetic cooker

Abstract

The application discloses an electromagnetic cooker, which comprises a table top for placing a pot and a temperature measuring part exposed to the table top from below the table top, and further comprises an elastic expansion part arranged below the table top and surrounding the temperature measuring part and internally forming a cavity, one end of the elastic expansion part being in sealed connection with the table top, the other end of the elastic expansion part being in sealed connection with the temperature measuring part, and the cavity being capable of expanding in response to an increase in internal pressure; and a flow guide channel formed between the temperature measuring part and the table top, the flow guide channel being in communication with the outside of the table top and the cavity. By arranging the elastic expansion part, the sealed cavity at the bottom of the pot is communicated with the elastic expansion part when the pot is placed on the table top, and when the pressure increases due to the gasification of the liquid left at the bottom of the pot at high temperature, the cavity of the elastic expansion part is capable of expanding adaptively to relieve the increase in internal pressure, so that the gas flow outwardly spouted is avoided, and thus the pot is not vibrated and noise is not generated. Meanwhile, the liquid overflowed can be avoided from entering the electromagnetic cooker, and the safety is further improved.

Description

Technical Field

[0001] This invention relates to the field of cooktops, and particularly to an electromagnetic cooktop. Background Technology

[0002] The surface of the induction cooker is made of flat microcrystalline glass. According to relevant national standards, the bottom of a flat-bottomed pan has a concave structure. When the pan is placed on the surface of the induction cooker, a relatively closed cavity is formed between the pan and the glass of the cooker head. After the induction cooker starts heating, the pan heats up and the temperature of the bottom of the pan rises rapidly. The temperature inside the cavity rises rapidly, and the air expands due to the heat. When the gas is ejected outward, it pushes up the pan, which will produce vibration and a hissing noise at the bottom of the pan.

[0003] Especially when there is water at the bottom of the pot, the cavity seal is better at the contact points between the bottom and the glass due to the presence of water. After the cookware starts to heat up, the temperature of the bottom of the pot rises rapidly, the temperature inside the cavity increases, the air expands due to the heat, and at the same time, the water at the bottom of the pot is rapidly vaporized by the high temperature of the bottom of the pot. The air pressure inside the cavity rises sharply, generating an outward airflow, and the cookware will vibrate continuously and produce noise.

[0004] Furthermore, the cavity formed between the cookware and the glass of the cooktop can cause high temperature measurement delays and inaccurate readings in commonly used solutions that install temperature sensors under the glass. While contact temperature measurement structures that expose the probe outside the glass can solve the problem of inaccurate readings, the moving structure of the sensor allows water to leak into the product, posing a safety hazard. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art in which the cookware will continuously vibrate and generate noise, and water will leak into the product due to the moving structure of the sensor, and to provide an electromagnetic cooker.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] An induction cooker includes a countertop for placing cookware and a temperature measuring unit, the temperature measuring unit being exposed from below the countertop, and further includes:

[0008] An elastic expansion section is disposed below the table surface and surrounds the temperature measuring section, forming a cavity inside. One end of the elastic expansion section is sealed to the table surface, and the other end of the elastic expansion section is sealed to the temperature measuring section. The cavity can expand in response to an increase in internal pressure.

[0009] A flow channel is formed between the temperature measuring unit and the platform, and the flow channel connects the outside of the platform and the cavity.

[0010] In this design, the aforementioned structure, with its elastic expansion section connected to the outside of the countertop via a flow channel, allows the sealed cavity at the bottom of the cookware to connect with the expansion section when the cookware is placed on the countertop. As the temperature inside the cavity rises and the air expands, while the residual liquid at the bottom of the pot vaporizes due to the high temperature, causing pressure to increase, the elastic expansion section expands adaptively. This increased volume alleviates the pressure rise and prevents outward ejection of airflow, thus preventing the cookware from vibrating and generating noise. Furthermore, the flow channel, positioned between the countertop and the temperature sensor, allows the cavity of the elastic expansion section to collect spilled liquid from the countertop, preventing it from entering the induction cooker and enhancing safety.

[0011] Preferably, a metal ring is also provided, and the bottom of the cavity is concave to form an arc-shaped cavity bottom, with the metal ring located at the lowest point of the arc-shaped cavity bottom.

[0012] In this solution, the aforementioned structure is used, with a metal ring installed at the bottom of the cavity. Because the metal ring's location generates a partial electromagnetic field, it heats up simultaneously when the induction cooker heats the food. This heats the moisture in the groove, accelerating evaporation, preventing excessive water accumulation, and reducing cleaning needs. Utilizing the induction cooker's own electromagnetic field results in lower costs and a simpler structure.

[0013] Preferably, the elastic expansion portion includes a body portion for forming a cavity of the elastic expansion portion and an edge portion extending outward from both ends of the body portion near and away from the temperature measuring portion to form a sealing connection with the table surface and the temperature measuring portion, wherein the thickness of the body portion is smaller than that of the edge portion.

[0014] In this solution, the above-mentioned structure is adopted, which is thick at the edges and thin in the middle, to ensure the reliability of the connection and increase the elasticity in the middle.

[0015] Preferably, the portion of the temperature measuring part located below the table surface protrudes towards the elastic expansion part to form a stepped portion, the edge portion is sealed to the side of the stepped portion facing the table surface, and the body portion is sealed to the side of the stepped portion facing the elastic expansion part.

[0016] In this solution, the above-mentioned structure is adopted, and the temperature measuring part has a stepped surface, which allows the side of the elastic expansion part to connect with the temperature measuring part from both above and side, achieving multiple seals and better performance.

[0017] Preferably, the side of the main body away from the temperature measuring part is recessed towards the inside of the cavity to form an arc-shaped cavity wall.

[0018] In this solution, the above-mentioned structure is adopted, with one side of the cavity being concave arc-shaped. During deformation, it can expand outward to increase the expandable space, further increasing the volume increment and improving the pressure reduction effect.

[0019] Preferably, the flow channel is formed in the gap between the temperature measuring part and the platform.

[0020] In this solution, the above structure is adopted, and the flow channel is directly formed by the gap between the temperature measuring unit and the table. The flow is guided by the assembly gap between the temperature measuring unit and the table. The structure is compact and solves the sealing defect caused by installing the temperature measuring unit on the table.

[0021] Preferably, the temperature measuring part includes a temperature measuring element, a bracket, and a heat-conducting shell. The temperature measuring element is disposed on the top surface of the bracket and abuts against the inner side of the heat-conducting shell. The heat-conducting shell covers the top surface of the bracket and extends along the side of the bracket to below the platform. The elastic expansion part is sealed to the heat-conducting shell.

[0022] In this solution, the aforementioned structure, by incorporating a heat-conducting outer shell that directly contacts the bottom of the pot, avoids the risk of damage caused by exposed sensors. Furthermore, the heat-conducting outer shell extending directly under the countertop and sealingly connecting with the elastic expansion section also prevents leakage at the seams.

[0023] Preferably, the bracket is capable of vertical movement and is further provided with an elastic element that supports the bracket in the vertical direction.

[0024] In this solution, the above structure is adopted. The bracket is height-adjustable, which can be adapted to different types of cookware, so that the temperature measuring part can always be in contact with the bottom of the cookware to ensure the temperature measuring effect.

[0025] Preferably, the edge of the elastic expansion portion on the side away from the temperature measuring portion is sandwiched between the countertop and the coil support of the induction cooker.

[0026] In this solution, the above structure is used to clamp the edge between the table and the coil support, which can further improve the sealing effect through clamping and pressing.

[0027] Preferably, the material of the elastic expansion portion includes rubber.

[0028] In this solution, the above structure is adopted, and the rubber material has strong sealing performance and good elasticity.

[0029] The positive and progressive effects of this invention are as follows: This invention discloses an induction cooker that, by incorporating an elastic expansion section connected to the outside of the countertop via a flow channel, allows the sealed cavity at the bottom of the cookware to connect with the elastic expansion section when the cookware is placed on the countertop. When the temperature inside the cavity rises and the air expands due to heat, and simultaneously, the residual liquid at the bottom of the cookware vaporizes due to high temperature, causing an increase in pressure, the cavity of the elastic expansion section can adaptively expand. By increasing its volume, it alleviates the rise in internal pressure, preventing the generation of outward-spraying airflow, thus preventing the cookware from vibrating and generating noise. Simultaneously, the flow channel is located between the countertop and the temperature measuring unit, allowing the cavity of the elastic expansion section to also collect spilled liquid from the countertop, preventing spilled liquid from entering the induction cooker, thus enhancing safety. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the electromagnetic stove according to Embodiment 1 of the present invention.

[0031] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0032] Figure 3 This is a schematic diagram of the internal structure of the induction cooker according to Embodiment 1 of the present invention.

[0033] Figure 4 This is a schematic diagram of the assembly structure of the elastic expansion part and the temperature measuring part in Embodiment 1 of the present invention.

[0034] Figure 5 This is a schematic diagram of the structure of the elastic expansion part in Embodiment 1 of the present invention.

[0035] Figure 6 This is a schematic diagram of the temperature measuring unit in Embodiment 1 of the present invention.

[0036] Figure 7 This is a schematic diagram of the assembly structure of the elastic expansion part and the temperature measuring part in Embodiment 2 of the present invention.

[0037] Figure 8 This is a schematic diagram of the internal structure of the electromagnetic stove in Embodiment 2 of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100 countertops

[0040] Temperature Measurement Section 1

[0041] Bracket 11

[0042] Step 111

[0043] Temperature sensing element 12

[0044] Thermally conductive housing 13

[0045] Elastic element 14

[0046] Elastic expansion part 2

[0047] Main body 21

[0048] Cavity 20

[0049] Arc-shaped cavity bottom 201

[0050] Arc-shaped cavity wall 202

[0051] Edge 22

[0052] Flow channel 3

[0053] Metal ring 4

[0054] Coil holder 200 Detailed Implementation

[0055] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0056] Example 1

[0057] like Figure 1 As shown, this embodiment provides an induction cooker, which includes a countertop 100 for placing cookware and a temperature measuring part 1. The temperature measuring part 1 is exposed below the countertop 100 and also includes an elastic expansion part 2, which is disposed below the countertop 100 and surrounds the temperature measuring part 1, forming a cavity 20 inside. One end of the elastic expansion part 2 is sealed to the countertop 100, and the other end is sealed to the temperature measuring part 1. The cavity 20 can expand in response to an increase in internal pressure. A flow channel 3 is formed between the temperature measuring part 1 and the countertop 100, and the flow channel 3 connects the outside of the countertop 100 and the cavity 20.

[0058] Specifically, in this design, the induction cooker's countertop 100 is equipped with a temperature measuring part 1 for contacting the bottom of the pot and detecting its temperature. The temperature measuring part 1 protrudes from the inside of the countertop 100, and its portion inside the countertop 100 is surrounded by an elastic expansion part 2. The elastic expansion part 2 is sealed to the inner side of the countertop 100 and the circumferential surface of the temperature measuring part 1, and communicates with the space above the countertop 100 through a guide channel 3. This allows the periphery of the temperature measuring part 1 below the countertop 100 to form a completely sealed isolation cavity 20, which is isolated from other induction cooker structures below the countertop 100. This cavity 20 is used to collect overflow liquid above the countertop 100, preventing overflow liquid from entering the induction cooker and damaging its circuit components.

[0059] The elastic expansion part 2 is made of elastic material, which allows it to expand in response to changes in internal pressure and increase the volume of its internal cavity 20. When the cookware is placed on the countertop 100, the sealed cavity at the bottom of the cookware and the cavity 20 of the elastic expansion part 2 will be connected to form a sealed space that is isolated from the outside world and the inside of the induction cooker. The elastic part can increase its volume by expanding when the internal gas pressure increases, thereby reducing the gas pressure in the space. This keeps the internal gas pressure at a low value, preventing the bottom of the pot from being pushed open, causing vibration, displacement, and noise, making it more convenient to use.

[0060] By incorporating an elastic expansion section 2, which connects to the outside of the countertop 100 via a flow channel 3, the sealed cavity at the bottom of the cookware can be connected to the elastic expansion section 2 when the cookware is placed on the countertop 100. When the temperature inside the cavity rises and the air expands due to heat, and the residual liquid at the bottom of the pot vaporizes due to high temperature, causing a pressure increase, the cavity 20 of the elastic expansion section 2 can adaptively expand. This increases the volume and alleviates the internal pressure rise, preventing the outward ejection of airflow and thus preventing the cookware from vibrating and generating noise. Simultaneously, the flow channel 3 is positioned between the countertop 100 and the temperature measuring unit 1, allowing the cavity of the elastic expansion section 2 to also collect spillage from the countertop 100, preventing spillage from entering the induction cooker and enhancing safety.

[0061] like Figure 2 , Figure 3 As shown, the elastic expansion portion 2 includes a body portion for forming a cavity 20 for forming the elastic expansion portion 2 and an edge portion 22 extending outward from both ends of the body portion near and away from the temperature measuring portion 1 to form a sealing connection with the table surface 100 and the temperature measuring portion 1. The thickness of the body portion is smaller than that of the edge portion 22.

[0062] Specifically, in this embodiment, the elastic expansion portion 2 is disc-shaped, and its cavity 20 is an annular groove with an opening at the top. The center and outer periphery of the elastic expansion portion 2 form the inner and outer ring walls of the cavity 20, respectively, while the portion between them is recessed downwards to form the cavity 20. The elastic expansion portion 2 has a through hole running vertically through its center to accommodate the temperature measuring portion 1. The inner and outer ring walls of the elastic expansion portion 2 protrude horizontally towards the center and outer ends at the top of the opening, respectively, forming edge portions 22. The remaining portion forming the cavity 20 constitutes the main body. This structure allows for 360-degree collection of overflow liquid around the temperature measuring portion 1.

[0063] The edge portion 22 serves to seal and connect with the platform 100 and the temperature measuring part 1, while the main body portion mainly bears the expansion and deformation of the cavity 20. Therefore, the overall thickness of the edge portion 22 is greater than that of the main body portion, with the edge being thicker and the middle being thinner, to ensure the reliability of the connection and increase the elasticity in the middle.

[0064] like Figure 3 , Figure 6As shown, the portion of the temperature measuring part 1 located below the platform 100 protrudes towards the elastic expansion part 2 to form a stepped portion 111. The edge portion 22 is sealed to the side of the stepped portion 111 facing the platform 100, and the body portion is sealed to the side of the stepped portion 111 facing the elastic expansion part 2. The stepped portion 111 of the temperature measuring part 1 allows the elastic expansion part 2 to connect simultaneously to the top and side of the stepped portion 111, achieving multiple seals and improving sealing performance. Specifically, as... Figure 3 As shown, the edge portion 22 of the elastic expansion portion 2 extends to the upper side of the step portion 111 and is sealed to the upper side of the step surface, while the inner ring wall of the body portion is connected to the side of the step portion 111 facing the body portion, so that the two form a right-angled two-sided connection, thereby achieving double sealing.

[0065] like Figure 3 , Figure 5 and Figure 6 As shown, the side of the main body away from the temperature measuring unit 1 is recessed into the cavity 20 to form an arc-shaped cavity wall 202. One side of the cavity 20 is concave arc-shaped, which can expand outward during deformation to increase the expandable space, further increasing the volume increment and improving the pressure reduction effect. Specifically, the arc-shaped cavity wall 202 protrudes inside the cavity 20. When the gas pressure increases, this part is more easily deformed and the deformation range is greater than other parts, resulting in a larger absolute volume difference between the before and after states, and thus a better pressure balancing effect.

[0066] like Figure 2 , Figure 3 As shown, the flow guiding channel 3 is formed in the gap between the temperature measuring part 1 and the platform 100. The flow guiding channel 3 is formed directly from the gap between the temperature measuring part 1 and the platform 100, and the flow is guided by the assembly gap between the temperature measuring part 1 and the platform 100. The structure is compact and it also solves the sealing defect caused by installing the temperature measuring part 1 on the platform 100.

[0067] like Figure 3 , Figure 6 As shown, the temperature measuring unit 1 includes a temperature measuring element 12, a bracket 11, and a heat-conducting housing 13. The temperature measuring element 12 is disposed on the top surface of the bracket 11 and abuts against the inner side of the heat-conducting housing 13. The heat-conducting housing 13 covers the top surface of the bracket 11 and extends along the side of the bracket 11 to below the tabletop 100. The elastic expansion portion 2 is sealed to the heat-conducting housing 13. By providing the heat-conducting housing 13, which directly contacts the bottom of the pot, the risk of damage caused by exposed sensors can be avoided. At the same time, the direct extension of the heat-conducting housing 13 to below the tabletop 100 and its direct sealing connection with the elastic expansion portion 2 also avoids the risk of leakage from the seams of the heat-conducting housing 13. Specifically, in this solution, the heat-conducting housing 13 is cap-shaped, fitted onto the top of the bracket 11 and extending continuously to the top surface of the step portion 111. The inner edge portion 22 of the elastic expansion portion 2 is directly sealed to the heat-conducting housing 13 to achieve a sealed connection with the temperature measuring unit 1.

[0068] like Figures 3 to 6 As shown, the bracket 11 can be raised and lowered in the vertical direction, and an elastic element 14 is also provided on the bracket 11 to support the bracket 11 in the vertical direction. The bracket 11 can be raised and lowered to adapt to different types of cookware, so that the temperature measuring part 1 can always be in contact with the bottom surface of the cookware to ensure the temperature measuring effect.

[0069] like Figure 3 As shown, the edge portion 22 of the elastic expansion portion on the side away from the temperature measuring portion 1 is clamped between the tabletop 100 and the coil support 200 of the induction cooker. Clamping the edge portion 22 between the tabletop 100 and the coil support 200 can further improve the sealing effect through clamping and pressing.

[0070] In this embodiment, the elastic expansion part 2 is made of rubber. Rubber has strong sealing properties and good elasticity. In other embodiments, it can be replaced with other common elastic sealing materials.

[0071] Example 2

[0072] The induction cooker in this embodiment has a similar structure to that in embodiment 1, except that:

[0073] like Figure 7 , Figure 8 As shown, a metal ring 4 is also provided at the bottom of the cavity 20 of the elastic expansion part 2. The bottom of the cavity 20 is concave to form an arc-shaped cavity bottom 201, and the metal ring 4 is located at the lowest point of the arc-shaped cavity bottom 201. Since the location of the metal ring 4 generates a certain amount of electromagnetic field, when the induction cooker heats up, the metal ring 4 will simultaneously generate a certain amount of heat. This heats the moisture in the groove, accelerating moisture evaporation, preventing excessive water accumulation, and reducing the need for cleaning. Utilizing the electromagnetic field of the induction cooker itself results in lower cost and a simpler structure.

[0074] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An induction cooker, comprising a countertop for placing cookware and a temperature measuring unit, the temperature measuring unit being exposed from below the countertop, characterized in that, It also includes: An elastic expansion section is disposed below the table surface and surrounds the temperature measuring section, forming a cavity inside. One end of the elastic expansion section is sealed to the table surface, and the other end of the elastic expansion section is sealed to the temperature measuring section. The cavity can expand in response to an increase in internal pressure. A flow channel is formed between the temperature measuring unit and the platform, and the flow channel connects the outside of the platform and the cavity; The elastic expansion portion includes a body portion for forming a cavity of the elastic expansion portion and an edge portion extending outward from both ends of the body portion near and away from the temperature measuring portion to form a sealing connection with the table surface and the temperature measuring portion, wherein the thickness of the body portion is less than that of the edge portion; The flow channel is formed in the gap between the temperature measuring part and the platform.

2. The electromagnetic stove as described in claim 1, characterized in that, A metal ring is also provided, and the bottom of the cavity is concave to form an arc-shaped cavity bottom, with the metal ring located at the lowest point of the arc-shaped cavity bottom.

3. The electromagnetic stove as described in claim 1, characterized in that, The portion of the temperature measuring part located below the platform protrudes towards the elastic expansion part to form a stepped portion, the edge portion is sealed and connected to the side of the stepped portion facing the platform, and the body portion is sealed and connected to the side of the stepped portion facing the elastic expansion part.

4. The electromagnetic stove as described in claim 1, characterized in that, The side of the main body away from the temperature measuring part is recessed towards the inside of the cavity to form an arc-shaped cavity wall.

5. The electromagnetic stove as described in claim 1, characterized in that, The temperature measuring part includes a temperature measuring element, a bracket, and a heat-conducting shell. The temperature measuring element is disposed on the top surface of the bracket and abuts against the inner side of the heat-conducting shell. The heat-conducting shell covers the top surface of the bracket and extends along the side of the bracket to below the platform. The elastic expansion part is sealed to the heat-conducting shell.

6. The electromagnetic stove as described in claim 5, characterized in that, The bracket is capable of vertical movement and is also provided with an elastic element that supports the bracket in the vertical direction.

7. The electromagnetic stove as described in claim 3, characterized in that, The edge of the elastic expansion portion on the side away from the temperature measuring portion is sandwiched between the countertop and the coil support of the induction cooker.

8. The electromagnetic stove as described in claim 1, characterized in that, The material of the elastic expansion part includes rubber.

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