Temperature detecting structure of a cooking device and cooking device

Abstract

The utility model relates to a kind of temperature detecting structure of cooking utensil and cooking utensil, including first upper shell, second upper shell, temperature detecting sensor, elastic member and bottom shell, the upper surface of first upper shell is first top surface, and fixed hole is equipped on first top surface, second upper shell includes abutting portion and fixed part, fixed part is fixed in fixed hole, so that the bottom surface of abutting portion is in abutment with first top surface;The upper surface of abutting portion is second top surface, and second top surface is higher than and covers first top surface on the top view projection, so that only through second top surface and the cooking container of cooking utensil are in abutment;Temperature detecting sensor is fixed in the inner cavity of fixed part, bottom shell is fixed on the mounting surface of cooking utensil, and form limiting cavity between bottom shell and mounting surface, the lower end of first upper shell is limited in limiting cavity, elastic member is respectively in abutment on bottom shell and first upper shell, so that the upper end of first upper shell can elastically extend limiting cavity. The present application is to provide a kind of new implementation structure of the temperature detecting device of cooking utensil.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensing devices, and in particular to a temperature sensing structure for a cooker and the cooker itself. Background Technology

[0002] In the design and production of cooking appliances, temperature detection is a key link to ensure cooking effect and safety of use. Therefore, it is necessary to design a reliable and accurate temperature detection structure to monitor the temperature changes inside the cooking container in real time and provide accurate temperature signals for the heating control system of the cooking appliance.

[0003] Currently, there are various implementations of temperature sensing structures in cookers. Most temperature sensing structures use a separate structure for the outer shell and sensor fixing component to reduce manufacturing costs. The outer shell and sensor fixing component are assembled to form the top surface of the temperature sensing structure. However, due to differences in manufacturing processes or other issues, the top surface of the temperature sensing structure is prone to unevenness, resulting in inaccurate temperature measurement. Furthermore, the core design ideas of other implementations of temperature sensing structures are all centered around how to maintain stable contact between the temperature sensor and the cooking container, improve temperature measurement accuracy, and simplify the assembly process. To meet the structural design requirements of different cookers, it is necessary to enrich the available solutions for temperature sensing structures to ensure the stability and accuracy of temperature measurement, thus providing new options for the design and application of temperature sensing structures in cookers. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems and provide a new implementation structure for the temperature detection device of a cooker, so that the temperature detection structure can detect temperature more accurately.

[0005] A temperature sensing structure for a cooker includes a first upper shell, a second upper shell, a temperature sensor, an elastic element, and a bottom shell. The upper surface of the first upper shell is a first top surface, and a fixing hole is provided on the first top surface. The second upper shell includes an abutting part and a fixing part. The fixing part is fixed in the fixing hole, such that the bottom surface of the abutting part abuts against the first top surface. The upper surface of the abutting part is a second top surface, which is higher than and covers the first top surface in a top view, so that it abuts against the cooking container of the cooker only through the second top surface. The temperature sensor is fixed in the inner cavity of the fixing part. The bottom shell is fixed to the mounting surface of the cooker, and a limiting cavity is formed between the bottom shell and the mounting surface. The lower end of the first upper shell is restricted in the limiting cavity. The elastic element abuts against the bottom shell and the first upper shell respectively, so that the upper end of the first upper shell can elastically extend out of the limiting cavity.

[0006] According to the temperature sensing structure of the cooker in this application, the assembly structure of the first upper shell and the second upper shell has been improved to ensure that only the second top surface of the second upper shell, which fixes the temperature sensor, comes into contact with the cooking container. This eliminates the problem of uneven contact surfaces and inaccurate temperature sensing caused by simultaneous contact of the first and second upper shells in the prior art. The elastic element abuts against the bottom shell and the first upper shell respectively, so that the upper end of the first upper shell can elastically extend and retract out of the limiting cavity, thereby driving the second top surface of the second upper shell to always be in close contact with the cooking container of the cooker. This effectively ensures the contact stability between the temperature sensor and the cooking container and improves the real-time performance and accuracy of temperature detection.

[0007] Furthermore, the first top surface includes a supporting ring surface and a first groove disposed within the supporting ring surface. The fixing hole is disposed on the bottom surface of the first groove. The bottom surface of the contact portion abuts against the supporting ring surface, thereby forming a cavity with the contact portion and the first groove. This application uses a supporting ring surface to support the second upper housing. Compared to a structure with multiple points of support or multiple support columns, the manufacturing process of the supporting ring surface is simpler and it is easier to maintain flatness. This makes the second top surface of the second upper housing more stable in contact with the cooking container. The first top surface forms a cavity between the first bottom surface and the bottom surface of the contact portion through the first groove. The cavity reduces the contact area between the supporting ring surface and the second upper housing, that is, it reduces the heat conduction area between the second and first upper housings. The air in the cavity is also a poor conductor of heat, thus minimizing the amount of heat transferred from the second upper housing to the first upper housing, thereby making the temperature detection of the temperature sensor more accurate.

[0008] Furthermore, it also includes a fixing nut, the fixing part including a threaded section, the position of the threaded section matching the fixing hole, so that when the threaded section is threadedly connected to the fixing nut, the abutting part and the fixing nut cooperate to clamp and fix it on the first top surface.

[0009] Furthermore, the fixing hole is a racetrack-shaped hole, and the shape of the threaded section matches the shape of the racetrack-shaped hole, thereby limiting the rotation of the second upper housing. This rotation limiting structure effectively restricts the circumferential rotation of the second upper housing on the first upper housing, preventing the second upper housing from rotating due to vibration, collision, or other factors during use. This ensures the stability of the contact position between the second top surface and the cooking container, preventing contact offset from affecting temperature measurement accuracy. In addition, the mating structure of the racetrack-shaped hole and the matching threaded section is simple and easy to manufacture. While achieving the rotation limiting function, it does not increase assembly complexity and improves production efficiency.

[0010] Furthermore, the fixing part also includes a narrowed section formed at the end of the fixing part. The narrowed section reduces its size through a narrowing process, thereby clamping and fixing the temperature sensor. The narrowing process is simple to operate and low in cost, enabling rapid fixing of the temperature sensor. The fixed structure has strong stability, effectively preventing axial or radial loosening of the temperature sensor during use. Narrowing fixation eliminates the need for additional fasteners, simplifying the structural design, reducing the number of parts, and lowering assembly difficulty and production costs.

[0011] Furthermore, the bottom surface of the cooking container is provided with a recessed plane, which abuts against the second top surface. Since cooking containers are generally cast, the bottom surface of the cooking container, if not treated, will be uneven, easily leading to point or line contact between the bottom surface and the second top surface. Therefore, grinding or other processes create a recessed plane, providing a dedicated contact area for the second top surface, increasing the contact area between the two, reducing temperature measurement errors that may result from point or line contact, and improving temperature transfer efficiency.

[0012] Furthermore, the temperature sensor is an NTC temperature sensor.

[0013] Furthermore, the first upper housing has a second groove formed on the inner sidewall relative to the supporting ring surface, and the upper part of the elastic element abuts against the second groove. The second groove provides a precise positioning and installation space for the elastic element, effectively limiting the lateral displacement of the elastic element during the extension and contraction process, ensuring that the elastic element always exerts force along the axial direction, and guaranteeing the stability and smoothness of the elastic extension and contraction of the first upper housing.

[0014] Furthermore, a third groove is provided in the middle of the bottom shell, and the lower part of the elastic element abuts against the third groove; a fixing ear is provided on the side of the bottom shell, and the elastic element is fixed to the mounting surface by the fixing ear. The third groove provides a precise positioning and installation space for the elastic element, effectively limiting the lateral displacement of the elastic element during the extension and contraction process, ensuring that the elastic element always exerts force along the axial direction, and ensuring the stability and smoothness of the elastic extension and contraction of the first upper shell.

[0015] This application also includes a cooking appliance, comprising the aforementioned temperature sensing structure, wherein the cooking appliance contains a freely removable cooking container, and the bottom surface of the cooking container is provided with a mounting groove; it also includes a heating element, the heating section of which is fixed in the heating groove; the mounting surface of the cooking appliance is provided with an electrical connector, and when the electrical connector of the heating element extends out of the heating groove and is inserted into the electrical connector, the relative distance between the bottom surface of the cooking container and the mounting surface can be maintained, so that the second top surface of the contact portion elastically contacts the cooking container of the cooking appliance. According to the cooking appliance of this application, the high-voltage heating element and the low-voltage temperature control structure are respectively located in different components, avoiding spatial interference between high-voltage and low-voltage components, and between the heating element and the temperature sensing element, thus improving the safety of the cooking appliance. The relative distance ensures that the heating element and the electrical connector form a stable plug-in structure, while ensuring that the second top surface of the contact part is in elastic contact with the cooking container of the cooking appliance, thereby improving the accuracy of temperature control. Attached Figure Description Figure 1 This is an exploded view of the temperature sensing structure of the cooker of this utility model.

[0016] Figure 2 This is a perspective view of the second upper shell of this utility model.

[0017] Figure 3 This is a perspective view of the cooking container of this utility model.

[0018] Figure 4 This is a cross-sectional view of the cooking appliance of this utility model.

[0019] Figure 5 for Figure 4 A magnified view of a portion of the image. Detailed Implementation

[0020] The accompanying drawings illustrate a temperature sensing structure and cooking appliance of this utility model.

[0021] like Figures 1 to 5The invention discloses a temperature sensing structure and a cooking appliance, comprising a first upper shell 1, a second upper shell 2, a temperature sensor 3, an elastic element 4, and a bottom shell 5. The cooking appliance also includes a base and a cooking container 6, the cooking container 6 being a pot body. The base has a mounting surface 7 for mounting the bottom shell 5, and the bottom shell 5 is provided with fixing ears 52. The bottom shell 5 is fixed to the mounting surface 7 by screws and the fixing ears 52. The upper surface of the first upper shell 1 is a first top surface, and a fixing hole 13 is provided on the first top surface. The second upper shell 2 includes an abutment part 21 and a fixing part 22. The fixing part 22 is fixed in the fixing hole 13, such that the bottom surface of the abutment part 21 abuts against the first top surface. The upper surface of the abutment part 21 is a second top surface 211. This structure ensures that the second top surface 211 is higher than the first top surface, and that the second top surface 211 covers the first top surface in a top view, thus providing the cooking appliance of this application. The temperature sensing structure has only the second top surface 211 abutting against the cooking container 6 of the cooker. The temperature sensor 3 is fixed in the inner cavity 223 of the fixing part 22, so that the temperature sensor 3 can detect the temperature of the cooking container 6. The temperature sensor 3 is preferably an NTC temperature sensor. The bottom shell 5 is fixed on the mounting surface 7 of the cooker and a limiting cavity is formed between the bottom shell 5 and the mounting surface 7. The lower end of the first upper shell 1 is restricted in the limiting cavity. The elastic member 4 abuts against the bottom shell 5 and the first upper shell 1 respectively, so that the upper end of the first upper shell 1 can elastically extend out of the limiting cavity. The bottom of the first upper shell 1 is provided with an outwardly extending limiting edge 14. The size of the limiting plate 14 is larger than the size of the telescopic hole opened on the mounting surface 7 for the first upper shell 1 to extend and retract, so that the limiting plate 14 of the first upper shell 1 is restricted to move up and down in the limiting cavity.

[0022] The first top surface includes a supporting ring surface 11 and a first groove 12 disposed in the supporting ring surface 11. The fixing hole 13 is disposed on the bottom surface of the first groove 12. The bottom surface of the contact part 21 abuts against the supporting ring surface 11, and the contact part 21 and the first groove 12 cooperate to form a cavity. The supporting ring surface 11 is used to support the second upper shell 2. Compared with the structure of multi-point support or multiple support columns, the manufacturing process of the supporting ring surface 11 is simpler and it is easier to maintain flatness. This makes the second top surface 211 of the second upper shell 2 more stable in contact with the cooking container 6. The cavity formed by the first groove 12 can reduce the contact area between the supporting ring surface 11 and the second upper shell 2, so that the second upper shell 2 transmits less heat to the first upper shell 1, thereby making the temperature detection of the temperature sensor 3 more accurate.

[0023] like Figure 5As shown, it also includes a fixing nut 8. The fixing part 22 includes a threaded section 221. The position of the threaded section 221 is matched with the fixing hole 13, so that when the threaded section 221 is threadedly connected to the fixing nut 8, the contact part 21 and the fixing nut 8 are clamped and fixed on the first top surface.

[0024] like Figure 1 and Figure 2 As shown, the fixing hole 13 is a racetrack-shaped hole, and the shape of the threaded section 221 matches the shape of the racetrack-shaped hole, thereby limiting the rotation of the second upper housing 2. This rotation limiting structure effectively restricts the circumferential rotation of the second upper housing 2 on the first upper housing 1, preventing the second upper housing 2 from rotating due to vibration, collision, or other factors during use. This ensures the stability of the contact position between the second top surface 211 and the cooking container 6, preventing the temperature measurement accuracy from being affected by contact offset. In addition, the matching structure of the racetrack-shaped hole and the matching threaded section 221 is simple and easy to process. While realizing the rotation limiting function, it does not increase the assembly complexity and improves production efficiency.

[0025] like Figure 2 As shown, the fixing part 22 also includes a narrowed section 222, which is formed at the end of the fixing part 22. The narrowed section 222 is formed at the end of the fixing part 22. The narrowed section 222 is formed by reducing the size of the narrowed section 222 through the narrowing process, thereby clamping and fixing the temperature sensor 3. The second upper housing 2 shown in the figure is the second upper housing 2 before the narrowing process. The narrowing process utilizes the plastic deformation of metal to shrink the tube and clamp the internal components. In actual production, it is often achieved by hammering or rotary forging to reduce the diameter. The narrowing process is simple to operate and has a low cost. It can quickly fix the temperature sensor 3, and the structure after fixation has strong stability. It can effectively prevent the temperature sensor 3 from loosening axially or radially during use. The narrowing fixation does not require additional fasteners, which simplifies the structural design, reduces the number of parts, and reduces the assembly difficulty and production cost.

[0026] like Figures 3 to 5 As shown, the bottom surface of the cooking container 6 is provided with a recessed plane 61, which abuts against the second top surface 211. Since the cooking container 6 is generally made by casting, the bottom surface of the cooking container 6 will be uneven if it is not treated, which may easily lead to point contact or line contact between the bottom surface and the second top surface 211. Therefore, grinding or other processes are used to form a recessed plane 61, which provides a dedicated contact area for the second top surface 211, increases the contact area between the two, reduces the temperature measurement error that may be caused by point contact or line contact, and improves the temperature transfer efficiency.

[0027] like Figure 5As shown, the first upper shell 1 has a second groove 15 formed on the inner sidewall of the supporting ring surface 11, and the upper part of the elastic member 4 abuts in the second groove 15; the bottom shell 5 has a third groove 51 in the middle, the elastic member 4 is a spring, and the lower part of the elastic member 4 abuts in the third groove 51; the bottom shell 5 has a fixing ear 52 on its side, which is fixed to the mounting surface 7. The second groove 15 and the third groove 51 provide a precise positioning and installation space for the elastic member 4, effectively limiting the lateral displacement of the elastic member 4 during the extension and retraction process, ensuring that the elastic member 4 always exerts force along the axial direction, and ensuring the stability and smoothness of the elastic extension and retraction of the first upper shell 1. The third groove 51 also has a through hole in the middle, through which the wire of the temperature sensor 3 passes through the control circuit board connected to the cooker.

[0028] like Figures 3 to 5 A cooking appliance is shown, including the temperature sensing structure described above. The cooking container 6 is freely removable. The bottom surface of the cooking container 6 has a mounting groove 62. An electrical connector 9 is provided on the mounting surface 7. It also includes a heating element 63. The heating section of the heating element 63 is fixed in the heating groove 62, and the electrical connector of the heating element 63 extends out of the heating groove 62 and connects to the electrical connector 9. The electrical connector 9 and the temperature sensing structure are respectively located on opposite sides of the mounting surface 7. Figure 3 and Figure 4 As shown, the end 621 of the mounting groove 62 faces the opposite side of the recessed plane 61. The electrical connection section of the heating tube 63 extends out of the heating groove 62 from the end 621 and connects with the electrical connection seat 9, so that the electrical connection seat 9 and the temperature detection structure are respectively set on opposite sides of the mounting surface 7, avoiding mutual interference between the two in space and function.

[0029] When the electrical connection section of the heating element 63 extends out of the heating groove and is inserted into the electrical connector 9, the bottom surface of the cooking container 6 is provided with a mounting post 64. The cooking container 6 is mounted onto the mounting surface 7 through the mounting post 64, so that the relative distance between the bottom surface of the cooking container 6 and the mounting surface 7 can be maintained. This allows the second top surface 211 of the contact part 21 to elastically contact the cooking container 6 of the cooker. The relative distance can be maintained to ensure the stable insertion of the heating element 63 and the electrical connector 9. At the same time, it ensures that the second top surface 211 of the contact part 21 and the cooking container 6 of the cooker are in an elastic contact state, thereby improving the accuracy of temperature control.

[0030] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A temperature sensing structure for a cooker, characterized in that, The appliance includes a first upper shell, a second upper shell, a temperature sensor, an elastic element, and a bottom shell. The upper surface of the first upper shell is a first top surface, and a fixing hole is provided on the first top surface. The second upper shell includes an abutting part and a fixing part. The fixing part is fixed in the fixing hole, such that the bottom surface of the abutting part abuts against the first top surface. The upper surface of the abutting part is a second top surface, which is higher than and covers the first top surface in a top view, so that it abuts against the cooking container of the cooker only through the second top surface. The temperature sensor is fixed in the inner cavity of the fixing part. The bottom shell is fixed on the mounting surface of the cooker, and a limiting cavity is formed between the bottom shell and the mounting surface. The lower end of the first upper shell is restricted in the limiting cavity. The elastic element abuts against the bottom shell and the first upper shell respectively, so that the upper end of the first upper shell can elastically extend out of the limiting cavity.

2. The temperature sensing structure of the cooker according to claim 1, characterized in that, The first top surface includes a supporting ring surface and a first groove disposed in the supporting ring surface. The fixing hole is disposed on the bottom surface of the first groove. The bottom surface of the abutting part abuts against the supporting ring surface, so that the abutting part and the first groove cooperate to form a cavity.

3. The temperature sensing structure of the cooker according to claim 1, characterized in that, It also includes a fixing nut, the fixing part including a threaded section, the position of the threaded section matching the fixing hole, so that when the threaded section is threadedly connected to the fixing nut, the abutting part and the fixing nut cooperate to clamp and fix it on the first top surface.

4. The temperature sensing structure of the cooker according to claim 3, characterized in that, The fixing hole is a racetrack-shaped hole, and the shape of the threaded section matches the shape of the racetrack-shaped hole, thereby limiting the rotation of the second upper housing.

5. The temperature sensing structure of the cooker according to claim 1, characterized in that, The fixing part also includes a narrowed section, which is formed at the end of the fixing part. The narrowed section is reduced in size by the narrowing process, thereby clamping and fixing the temperature sensor.

6. The temperature sensing structure of the cooker according to claim 1, characterized in that, The bottom surface of the cooking container is provided with a recessed plane, which abuts against the second top surface.

7. The temperature sensing structure of the cooker according to claim 1, characterized in that, The temperature sensor is an NTC temperature sensor.

8. The temperature sensing structure of the cooker according to claim 2, characterized in that, The first upper housing has a second groove formed on the inner sidewall of the opposite support ring surface, and the upper part of the elastic member abuts against the second groove.

9. The temperature sensing structure of the cooker according to claim 1, characterized in that, The bottom shell has a third groove in the middle, and the lower part of the elastic element abuts against the third groove; the bottom shell has a fixing ear on the side, and is fixed to the mounting surface by the fixing ear.

10. A cooking appliance, characterized in that, The cooker includes a temperature sensing structure as described in any one of claims 1 to 9, wherein the cooker has a freely removable cooking container inside, and the bottom surface of the cooking container has a mounting groove; it also includes a heating element, the heating section of which is fixed in the heating groove; the mounting surface of the cooker is provided with an electrical connector, and when the electrical connector of the heating element extends out of the heating groove and is inserted into the electrical connector, the relative distance between the bottom surface of the cooking container and the mounting surface can be maintained, so that the second top surface of the contact part elastically contacts the cooking container of the cooker.

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