Pressure cooking utensil

Abstract

The utility model discloses a pressure cooking utensil which comprises a heat preservation cover and a heating disc arranged in the heat preservation cover, a pressure bearing piece is arranged between the bottom wall of the heating disc and the heat preservation cover, a supporting step is arranged on the side wall of the heat preservation cover, and the pressure bearing piece abuts against the supporting step so that a deformation space can be formed between the pressure bearing piece and the bottom wall of the heat preservation cover. The heating disc is provided with three supporting columns in a protruding mode, the pressure-bearing piece is provided with first passing openings corresponding to the supporting columns, the pressure-bearing piece is provided with two connecting lines which pass through any two first passing openings and intersect, the two connecting lines divide the pressure-bearing piece into four areas, the area with the smallest area is the first area, and a limiting part is arranged between the pressure-bearing piece and the heat preservation cover. The limiting part is located on the outer side of the other area except the first area. The position of the limiting part is far away from the three supporting columns, so that the positions of the supporting columns and the limiting part on the pressure-bearing piece are distributed more dispersedly, the stress of the pressure-bearing piece is dispersed, the service life of the pressure-bearing piece is prolonged, and local stress concentration of the pressure-bearing piece is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a pressure cooking appliance. Background Technology

[0002] The pressure testing structure is one of the important functional components in a pressure cooker. It includes a pressure-bearing plate located between the bottom of the inner pot and the insulation cover. When the inner pot is pressurized, it will move downward under the pressure, which will cause the pressure-bearing plate to deform. As the pressure inside the inner pot increases, the downward movement of the inner pot also increases. When the pressure exceeds the set maximum pressure value, the inner pot will trigger the pressure switch at the bottom of the insulation cover, and the pressure cooker will stop heating and begin to depressurize. After depressurization, the inner pot will move upward and return to its original position under the elastic force of the pressure-bearing plate.

[0003] During assembly, the pressure-bearing component is fixed to the bottom wall of the insulation cover, occupying a large amount of space below the heating plate. This results in a smaller space between the pressure-bearing component and the bottom wall of the insulation cover, thus limiting the deformation space for the pressure-bearing component. The maximum deformation of the pressure-bearing component directly affects the maximum pressure of the pressure cooking appliance, making it difficult to increase the cooking pressure of conventional pressure cooking appliances. They can often only cook at a pressure of 70 kPa, making it difficult to further improve the cooking efficiency of pressure cooking appliances.

[0004] Furthermore, because the bottom wall of the insulation cover has a large flat surface and relatively weak structural strength, when the pressure-bearing component is subjected to downward pressure from the heating plate, this force is transmitted to the bottom wall of the insulation cover through contact, and thus borne by the bottom wall. This makes the bottom wall of the insulation cover prone to plastic deformation, causing changes in the distance between the pressure switch and the heating plate, reducing the accuracy of pressure detection and control, and making precise pressure control impossible.

[0005] Furthermore, some pressure cooking appliances have large-area thin-plate structures for their pressure-bearing components. While these structures have good elastic deformation capabilities, their structural strength is relatively low. These components not only need to be fixedly connected to the heating plate, but also require limiting structures for installation during assembly. Since the fixed position and the limiting structure are often close together, the fixing force and the force applied by the limiting structure are relatively concentrated on the pressure-bearing component. This can easily cause localized plastic deformation or damage to the pressure-bearing component, thus affecting the overall deformation effect of the pressure-bearing component and ultimately impacting the accuracy of pressure testing. Utility Model Content

[0006] This utility model provides a pressure cooking appliance to solve the problems of insufficient space between the pressure-bearing component and the bottom wall of the heat preservation cover, which cannot meet the requirements for large deformation of the pressure-bearing component, and the relatively concentrated stress position of the pressure-bearing component, which is prone to local deformation or damage, resulting in a decrease in the accuracy of pressure measurement and control.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A pressure cooking appliance includes a heat preservation cover and a heating plate placed inside the heat preservation cover. A pressure-bearing member is provided between the bottom wall of the heating plate and the heat preservation cover. The side wall of the heat preservation cover is provided with a support step protruding towards the inside of the heat preservation cover. The pressure-bearing member rests against the support step to allow for deformation space between the pressure-bearing member and the bottom wall of the heat preservation cover. Three support columns protrude from the lower side of the heating plate. The pressure-bearing member is provided with a first passage corresponding to each of the support columns. The pressure-bearing member has two lines that pass through any two of the first passages and intersect. The two lines divide the pressure-bearing member into four regions, with the smallest area being the first region. A limiting part is provided between the pressure-bearing member and the heat preservation cover. The limiting part is located outside the other regions outside the first region.

[0009] The pressure cooking appliance of this utility model also has the following additional technical features:

[0010] The pressure-bearing component also has a second region disposed opposite to the first region with respect to the intersection of the line connecting them, and the limiting part is located in the second region; or, the pressure-bearing component also has a third region disposed adjacent to the first region, and the limiting part is located in the third region.

[0011] The limiting part includes a limiting rib provided on the supporting step, and a limiting notch provided on the bearing member for cooperating with the limiting rib.

[0012] The limiting part includes a limiting protrusion protruding from the lower side of the pressure bearing member, and a limiting opening provided on the step surface of the supporting step.

[0013] The side wall of the heat insulation cover is also provided with positioning ribs. The positioning ribs are located on the outside of the pressure-bearing component so as to stop the pressure-bearing component at the edge and limit the radial movement of the pressure-bearing component.

[0014] The supporting step has a step surface and a transition portion located above the step surface, and positioning ribs are provided on the step surface or the transition portion.

[0015] The supporting steps extend circumferentially around the insulation cover to surround it; or, the supporting steps are multiple segments and are spaced apart circumferentially around the insulation cover.

[0016] The bottom of the heating plate is provided with a downward protruding fixing post, and the pressure-bearing component is provided with a second passage for the fixing post to pass through. The support post is used to fix the pressure-bearing component, and the fixing post is used to fix the insulation cover. The distance between the first passage and the center of the pressure-bearing component is greater than the distance between the second passage and the center of the pressure-bearing component.

[0017] The heating plate is also equipped with a downward protruding detection column, and a pressure switch is installed at the bottom of the heat insulation cover. The detection column is used to contact the pressure switch. The pressure-bearing component is also equipped with a third passage for the detection column to pass through. The third passage is located at the midpoint of the line connecting two of the first passages.

[0018] The thickness of the pressure-bearing component is 1-2mm, the diameter of the heating plate is D1, and the diameter of the pressure-bearing component is D2, wherein 0.9D1≤D2≤D1.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0020] 1. In this invention, by providing supporting steps on the side wall of the insulation cover, the pressure-bearing component rests against the supporting steps. This shifts the support position of the insulation cover on the support component from the original bottom support to the side support, thereby avoiding the impact of bottom deformation of the insulation cover on the accuracy of pressure detection. Furthermore, the outer edge of the pressure-bearing component rests against the supporting steps, while the middle part is suspended, increasing the space for deformation of the pressure-bearing component. This allows the pressure-bearing component to undergo greater deformation, thus meeting the needs of higher pressure cooking and significantly improving the performance of the pressure cooking appliance. In addition, the supporting steps also increase the strength of the insulation cover, enabling it to more stably support the pressure-bearing component and reducing the possibility of deformation.

[0021] The two connecting lines intersect at one of the first passages. The area of ​​the first region is the smallest, and its distance from the support column is relatively close. The limiting part is set on the outside of the other regions, so that the position of the limiting part is far away from the three support columns. This makes the position of the support column and the limiting part on the pressure-bearing component more dispersed, thereby dispersing the stress on the pressure-bearing component, improving the service life of the pressure-bearing component, and avoiding local stress concentration on the pressure-bearing component.

[0022] 2. In a preferred embodiment of this utility model, the pressure-bearing member further comprises a second region disposed opposite to the intersection of the lines connecting the first region and the second region, with the limiting part located in the second region. The limiting part is located outside the second region, placing it in the region furthest from the first opening at the intersection of the two lines, and also far from the other two support columns. The lines connecting the limiting part and the three first openings form a quadrilateral, and the first openings at the intersection of the limiting part and the two lines form two opposite angles of the quadrilateral, further increasing the distance between the limiting part and each support column, thus making the fixing force and limiting force on the pressure-bearing member more evenly distributed.

[0023] 3. In a preferred embodiment of this utility model, the side wall of the heat insulation cover is further provided with positioning ribs. The positioning ribs are located on the outside of the pressure-bearing component to stop the pressure-bearing component at its edge and thus radially limit its movement. Multiple positioning ribs are spaced circumferentially along the side wall of the heat insulation cover, and are located on the outside of the pressure-bearing component. These ribs cooperate with the outer edge stop of the pressure-bearing component to position and radially limit its movement. When the pressure-bearing component is installed, it is placed within the space enclosed by the positioning ribs, ensuring that the pressure-bearing component remains centered relative to the heat insulation cover. When the pressure-bearing component is pressed down by the heating plate, the positioning ribs stop the pressure-bearing component, thereby restricting lateral movement and ensuring that the pressure-bearing component remains coaxial with the heat insulation cover.

[0024] 4. In a preferred embodiment of this utility model, the bottom of the heating plate is provided with a downwardly protruding fixing column, and the pressure-bearing component is provided with a second passage for the fixing column to pass through. A support column is used for fixed connection with the pressure-bearing component, and the fixing column is used for fixed connection with the insulation cover. The distance between the first passage and the center of the pressure-bearing component is greater than the distance between the second passage and the center of the pressure-bearing component. The support column is fixed to the pressure-bearing component. When the inner liner presses the heating plate downwards, the heating plate transmits downward pressure to the pressure-bearing component through the support column, thereby causing deformation of the pressure-bearing component. Since the diameter of the first passage is greater than the diameter of the second passage, the area outside the first passage of the pressure-bearing component is supported by the support step, and the second passage inside the first passage is connected by the fixing column and the insulation cover. This ensures that both the inner and outer sides of the area where the support column applies force to the pressure-bearing component are supported, thereby appropriately reducing the deformation of the pressure-bearing component at the first passage. This results in a smaller deformation of the pressure-bearing component under the same pressure, making it more difficult for the pressure-bearing component to reach its limit deformation, thus enabling it to withstand greater pressure and facilitating higher-pressure cooking.

[0025] 5. In a preferred embodiment of this utility model, there are at least two first passages, the heating plate is also provided with a downwardly protruding detection post, the bottom of the insulation cover is provided with a pressure switch, the detection post is used to contact the pressure switch, and the pressure-bearing component is also provided with a third passage for the detection post to pass through. The third passage is located at the midpoint of the line connecting two of the first passages. The third passage is located at the midpoint of the line connecting two of the first passages, so that the detection position of the pressure switch is closest to the two support posts. In this way, the detection position of the pressure switch can comprehensively reflect the force situation at the two support posts, thereby comprehensively considering the influence of the deformation at the two support posts on the detection position, and more accurately detecting and judging the overall pressure inside the pot. Even if the inner pot and the heating plate are not well matched or the force on the heating plate is uneven, the pressure change inside the pot can be detected more accurately, thereby greatly improving the accuracy of pressure detection, achieving precise pressure control, ensuring reliable pressure cooking and cooking efficiency, and improving the safety of pressure cooking appliances. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a cross-sectional view of a portion of the structure of a pressure cooking appliance according to one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A magnified view of area A in the middle;

[0029] Figure 3 This is a structural schematic diagram of a pressure-bearing component according to one embodiment of the present invention;

[0030] Figure 4 This is a structural schematic diagram of the pressure-bearing component according to another embodiment of the present invention;

[0031] Figure 5 This is a top view of the heat insulation cover according to one embodiment of the present utility model;

[0032] Figure 6 This is a bottom view of the heating plate according to one embodiment of the present invention;

[0033] Figure 7 This is a bottom view of the heating plate and pressure-bearing component after assembly according to one embodiment of the present invention.

[0034] in:

[0035] 1. Insulation cover; 11. Support step; 111. Step surface; 112. Transition section; 12. Positioning rib; 13. Limiting rib; 14. Deformation space;

[0036] 2. Heating plate; 21. Support column; 22. Fixing column; 221. First fixing column; 222. Second fixing column; 23. Detection column; 24. Temperature measuring port;

[0037] 3. Pressure-bearing component; 31. First through-hole; 32. Second through-hole; 321. First through-hole; 322. Second through-hole; 33. Third through-hole; 34. Fourth through-hole; 35. Limiting notch; 36. First region; 37. Second region; 38. Third region;

[0038] 4. Pressure switches;

[0039] 5 temperature measuring components;

[0040] 6. Fasteners. Detailed Implementation

[0041] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0043] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] like Figures 1 to 4As shown, a pressure cooking appliance includes a heat preservation cover 1 and a heating plate 2 placed inside the heat preservation cover 1. A pressure-bearing member 3 is provided between the bottom wall of the heating plate 2 and the heat preservation cover 1. The side wall of the heat preservation cover 1 is provided with a support step 11 protruding towards the inside of the heat preservation cover 1. The pressure-bearing member 3 rests against the support step 11 to provide a deformation space 14 between the pressure-bearing member 3 and the bottom wall of the heat preservation cover 1. Three support columns 21 are protruding from the lower side of the heating plate 2. The pressure-bearing member 3 is provided with a first passage 31 corresponding to each of the support columns 21. The pressure-bearing member 3 has two lines that pass through any two of the first passages 31 and intersect. The two lines divide the pressure-bearing member 3 into four regions, of which the smallest area is the first region 36. A limiting part is provided between the pressure-bearing member 3 and the heat preservation cover 1. The limiting part is located outside the other regions outside the first region 36.

[0047] In this utility model, the pressure-bearing component 3 is a structure made of elastic material, preferably a manganese sheet. The heating plate 2 and the pressure-bearing component 3 are fixed by the support column 21 and the first passage 31. The pressure-bearing component 3 can deform when it is pressed down by the support column 21, and can drive the heating plate 2 to move upward and reset under its own elastic force.

[0048] In this utility model, such as Figure 1 As shown, by providing a support step 11 on the side wall of the heat insulation cover 1, the pressure-bearing component 3 rests on the support step 11, shifting the support position of the heat insulation cover 1 from the original bottom support to the side support. This avoids the impact of bottom deformation of the heat insulation cover 1 on the accuracy of pressure detection. Furthermore, the outer edge of the pressure-bearing component 3 rests on the support step 11, while the middle part is suspended, increasing the space for deformation of the pressure-bearing component 3. This allows the pressure-bearing component 3 to undergo greater deformation, thus meeting the needs of higher pressure cooking and significantly improving the performance of the pressure cooking appliance. In addition, the support step 11 also increases the strength of the heat insulation cover 1, enabling it to more stably support the pressure-bearing component 3 and reducing the possibility of deformation.

[0049] like Figure 3 , Figure 4 As shown, the two connecting lines intersect at one of the first passages 31. The area of ​​the first region 36 is the smallest, and its distance from the support column 21 is relatively close. The limiting part is set on the outside of the other regions, so that the position of the limiting part is far away from the three support columns 21. This makes the positions of the support columns 21 and the limiting part on the pressure-bearing member 3 more dispersed, thereby dispersing the force on the pressure-bearing member 3, improving the service life of the pressure-bearing member 3, and avoiding local stress concentration in the pressure-bearing member 3.

[0050] It should be noted that the limiting part can be located outside the pressure-bearing member 3 or on the pressure-bearing member 3. When the limiting part is located on the pressure-bearing member 3, the distance between it and the intersection of the two connecting lines is greater than the distance between it and the edge of the pressure-bearing member 3.

[0051] Preferably, such as Figure 1 As shown, the thickness of the pressure-bearing component 3 is 1-2mm, the diameter of the heating plate 2 is D1, and the diameter of the pressure-bearing component 3 is D2, where 0.9D1≤D2≤D1. The large-area pressure-bearing component 3 has a simpler structure, more stable production quality, and improves the overall safety of the machine. At the same time, the large-area pressure-bearing component 3 can achieve a greater range of deformation, thus enabling the pressure cooking appliance to cook at higher pressures.

[0052] Specifically, in one implementation, such as Figure 3 As shown, the pressure-bearing member 3 also has a second region 37 disposed opposite to the intersection of the line connecting the first region 36 and the limiting part located in the second region 37.

[0053] The limiting part is located outside the second region 37, so that the limiting part is in the region farthest from the first passage 31 at the intersection of the two connecting lines, and is also far from the other two support columns 21. The line connecting the limiting part and the three first passages 31 is a quadrilateral, and the first passage 31 at the intersection of the limiting part and the two connecting lines is two opposite corners of the quadrilateral, thereby further increasing the distance between the limiting part and each support column 21, so that the fixing force and limiting force on the pressure member 3 are more evenly distributed.

[0054] Specifically, such as Figure 3 As shown, the limiting part includes a limiting notch 35 formed at the edge of the second region 37.

[0055] In another implementation, such as Figure 4 As shown, the pressure-bearing member 3 also has a third region 38 disposed adjacent to the first region 36, and the limiting part is located in the third region 38.

[0056] Specifically, such as Figure 4 As shown, the lines connecting the three first passages 31 form an equilateral triangle. Similarly, the lines connecting the three support columns 21 also form an equilateral triangle. The pressure-bearing component 3 is divided into four regions by the two connecting lines. The first region 36 has the smallest area, the second region 37 is opposite to the first region 36 and has a larger area, and the third regions 38 on both sides have the same area. Of course, the three first passages 31 can also be arranged in other ways, as long as the three first passages 31 are not collinear.

[0057] It should be noted that the present invention does not limit the structure of the limiting part, which can be one of the following embodiments:

[0058] Implementation Method 1: In this implementation method, as follows Figures 3 to 5 As shown, the limiting part includes a limiting rib 13 provided on the supporting step 11, and a limiting notch 35 provided on the bearing member 3 for cooperating with the limiting rib 13.

[0059] The limiting rib 13 and the limiting notch 35 work together to position the pressure-bearing component 3 circumferentially, limiting the installation direction of the pressure-bearing component 3. At the same time, when the pressure-bearing component 3 is under pressure, it can also restrict the rotation of the pressure-bearing component 3, so that the pressure-bearing component 3 can only deform in the up and down direction, and cannot rotate or move, thus ensuring the overall reliability of the pressure measuring structure.

[0060] like Figure 2 , Figure 5 As shown, the support step 11 has a step surface 111 and a transition portion 112 located above the step surface 111. The limiting rib 13 is provided on the step surface 111 or the transition portion 112, and the edge of the pressure-bearing member 3 is provided with a limiting notch 35.

[0061] like Figure 2 As shown, the transition part 112 is a vertical wall above the step surface 111. The limiting rib 13 can be set in the transition part 112 or between the transition part 112 and the step surface 111, so as to be located above the step surface 111. The limiting rib 13 protrudes towards the center of the heat insulation cover 1. The edge of the pressure member 3 is provided with a limiting notch 35 corresponding to the limiting rib 13.

[0062] Implementation Method 2: In this embodiment, the limiting part includes a limiting protrusion protruding from the lower side of the pressure bearing member 3, and a limiting opening provided on the step surface 111 of the supporting step 11.

[0063] Specifically, the limiting protrusion can be set on the step surface 111 of the supporting step 11 and protrude upward, and the pressure bearing member 3 has a limiting opening corresponding to the limiting protrusion so that the two can be positioned in a coordinated manner.

[0064] Of course, the positions of the limiting protrusion and the limiting port can also be interchanged, that is, the limiting protrusion is set on the pressure bearing 3 and the corresponding limiting port is set on the support step 11. This is not limited here.

[0065] In a preferred embodiment, such as Figure 5 As shown, the side wall of the heat insulation cover 1 is also provided with a positioning rib 12. The positioning rib 12 is located on the outside of the pressure bearing member 3 so as to stop with the edge of the pressure bearing member 3 to limit the radial movement of the pressure bearing member 3.

[0066] Multiple positioning ribs 12 are spaced circumferentially along the sidewall of the insulation cover 1, and the positioning ribs 12 are located on the outside of the pressure-bearing component 3. They can cooperate with the outer edge stop of the pressure-bearing component 3 to position and radially limit the pressure-bearing component 3. When the pressure-bearing component 3 is installed, it is placed within the space enclosed by the positioning ribs 12, so that the pressure-bearing component 3 can remain centered relative to the insulation cover 1. When the pressure-bearing component 3 is pressed down by the heating plate 2, the positioning ribs 12 can stop the pressure-bearing component 3, thereby restricting the lateral movement of the pressure-bearing component 3 and keeping the pressure-bearing component 3 coaxial with the insulation cover 1.

[0067] The positioning rib 12 can be provided on the transition part 112, so that the positioning rib 12 is located above the step surface 111 and protrudes towards the center of the insulation cover 1, so as to stop with the outer edge of the pressure bearing member 3 and form a radial limit on the pressure bearing member 3. Alternatively, it can be provided on the step surface 111 of the supporting step 11 and protrude upward, with the positioning rib 12 located on the outside of the pressure bearing member 3, which can also form a radial limit on the pressure bearing member 3. No limitation is made here.

[0068] Preferably, such as Figure 5 As shown, the limiting rib 13 has a mating end close to the center of the heat insulation cover 1, and the positioning rib 12 has a stop end close to the center of the heat insulation cover 1. The diameter of the equivalent circle where the mating end is located is smaller than the diameter of the equivalent circle where the stop end is located.

[0069] Specifically, the diameter of the equivalent circle where the mating end is located is smaller than the diameter of the pressure-bearing component 3, while the diameter of the equivalent circle where the stop end is located is larger than the diameter of the pressure-bearing component 3.

[0070] The equivalent circle containing the stop end is the circle formed by the stop ends of the multiple positioning ribs 12. The diameter of this circle is slightly larger than the diameter of the bearing member 3, allowing the bearing member 3 to be placed within the space enclosed by the positioning ribs 12 without interfering with them. When the bearing member 3 tends to move laterally, it stops with the outer positioning rib 12, thus restricting the movement of the bearing member 3. The equivalent circle containing the mating end has a smaller diameter than the diameter of the bearing member 3, causing the mating end to interfere with the bearing member 3. Therefore, a limiting notch 35 is provided on the bearing member 3 to avoid the limiting rib 13. At the same time, the two work together to position the bearing member 3.

[0071] It should be noted that the present invention does not limit the structure of the supporting step 11, which can be one of the following embodiments:

[0072] Implementation Method 1: In this implementation method, as follows Figure 5 As shown, the support step 11 extends circumferentially around the insulation cover 1. The support step 11 connects end to end to form a 360° circumference around the insulation cover 1, so that it can form stable support for all areas of the pressure-bearing component 3 in the circumference, making the pressure-bearing component 3 stable and uniform in force, thus making the deformation in the central area more stable and reliable, which helps to accurately measure and control pressure.

[0073] Implementation Method 2: In this implementation method, the support steps 11 are multiple segments arranged at intervals along the circumference of the insulation cover 1. The support steps 11 are discontinuous segments along the circumference of the insulation cover 1, and the sidewall of the insulation cover 1 has a more tortuous structure between adjacent support steps 11, thereby further improving the strength of the support steps 11 and providing stable support for the pressure-bearing component 3. This also saves on the material used for the support steps 11, thus reducing costs.

[0074] As a preferred embodiment of this utility model, such as Figure 1 , Figure 3 , Figure 6 , Figure 7 As shown, the bottom of the heating plate 2 is provided with a downward protruding fixing post 22, and the pressure bearing member 3 is provided with a second passage 32 for the fixing post 22 to pass through. The support post 21 is used to be fixedly connected to the pressure bearing member 3, and the fixing post 22 is used to be fixedly connected to the heat insulation cover 1. The distance between the first passage 31 and the center of the pressure bearing member 3 is greater than the distance between the second passage 32 and the center of the pressure bearing member 3.

[0075] It is understandable that, with the center of the pressure-bearing component 3 as the center, the radius of the circle containing the first passage 31 is greater than the radius of the circle containing the second passage 32.

[0076] The support column 21 is fixed to the pressure-bearing component 3. When the inner liner presses down the heating plate 2, the heating plate 2 transmits downward pressure to the pressure-bearing component 3 through the support column 21, causing the pressure-bearing component 3 to deform. Since the radius of the circle containing the first passage 31 is larger than the radius of the circle containing the second passage 32, the pressure-bearing component 3 is supported by the support step 11 in the area outside the first passage 31, and connected to the fixed column 22 and the insulation cover 1 at the second passage 32 inside the first passage 31. This ensures that both the inner and outer sides of the area where the support column 21 applies force to the pressure-bearing component 3 are supported, thereby appropriately reducing the deformation of the pressure-bearing component 3 at the first passage 31. This results in a smaller deformation of the pressure-bearing component 3 under the same pressure, making it more difficult for the pressure-bearing component 3 to reach its limit deformation, thus enabling it to withstand greater pressure and facilitating higher-pressure cooking. Compared to conventional 70 kPa pressure cooking, this pressure cooking appliance can perform cooking at 100 kPa or even higher pressures.

[0077] When assembling the pressure cooking appliance of this utility model, the pressure-bearing component 3 and the heating plate 2 can be fixedly connected by the support column 21 to form an integral component. Then, the component is fixedly connected to the heat preservation cover 1 by the fixing column 22 on the heating plate 2, thereby achieving the fixation of the three components, reducing the number of parts, reducing the assembly difficulty, and improving production efficiency.

[0078] Preferably, such as Figure 1 , Figure 3 , Figure 6 , Figure 7 As shown, the heating plate 2 is also provided with a downward protruding detection column 23, and the bottom of the heat insulation cover 1 is provided with a pressure switch 4. The detection column 23 is used to contact the pressure switch 4. The pressure bearing component 3 is also provided with a third passage 33 for the detection column 23 to pass through. The third passage 33 is located at the midpoint of the line connecting two of the first passages 31.

[0079] In this utility model, such as Figure 1As shown, the support column 21 is used to fix the pressure-bearing component 3 and transmit the force to the pressure-bearing component 3. At the same time, a detection column 23 is also provided at the bottom of the heating plate 2. The detection column 23 passes through the third passage 33 of the pressure-bearing component 3 to cooperate with the pressure switch 4 at the bottom of the heat insulation cover 1.

[0080] It is understandable that the first passage 31 is set to correspond one-to-one with the support column 21, the second passage 32 is set to correspond one-to-one with the fixed column 22, and the third passage 33 is set to correspond to the detection column 23. Therefore, the position of the first passage 31 corresponds to the position of the support column 21, the position of the second passage 32 corresponds to the position of the fixed column 22, and the position of the third passage 33 corresponds to the position of the detection column 23, which is also the detection position of the pressure switch 4. In other words, on the heating plate 2, the detection column 23 is also located at the midpoint of the line connecting the two support columns 21.

[0081] The third passage 33 is located at the midpoint of the line connecting the two first passages 31, making the detection position of the pressure switch 4 the closest point to the two support columns 21. This allows the detection position of the pressure switch 4 to comprehensively reflect the force situation at the two support columns 21, thereby taking into account the influence of the deformation at the two support columns 21 on the detection position, and more accurately detecting and judging the overall pressure inside the pot. Even if the inner pot and the heating plate 2 are not well matched or the force on the heating plate 2 is uneven, the pressure change inside the pot can be detected more accurately, thereby greatly improving the accuracy of pressure detection, achieving precise pressure control, ensuring reliable pressure cooking and cooking efficiency, and improving the safety of pressure cooking appliances.

[0082] It should be noted that in this utility model, the line connecting the two first passages 31 is the line connecting the centers of the two first passages 31, wherein, as shown... Figure 3 , Figure 4 , Figure 7 As shown, the third passage 33 can be the center of which coincides with the midpoint of the connecting line, or at least a portion of the third passage 33 can cover the midpoint of the connecting line. In other words, as long as the midpoint of the connecting line passes through the third passage 33, it is a solution protected by this utility model.

[0083] Specifically, such as Figure 7 As shown, there are three first passages 31, and the lines connecting the three first passages 31 form an equilateral triangle. The third passage 33 is located at the midpoint of one side of this equilateral triangle. Similarly, the lines connecting the three support pillars 21 also form an equilateral triangle, and the detection pillar 23 is located at the midpoint of one side of this equilateral triangle.

[0084] Preferably, such as Figure 1 , Figure 7As shown, the pressure cooking appliance also includes fasteners 6, which pass through the first opening 31 to securely connect with the support column 21. Connecting the support column 21 and the pressure-bearing component 3 using fasteners such as screws 6 ensures strong connection stability, and the preload of the fasteners 6 improves the structural strength of the connection between the pressure-bearing component 3 and the support column 21, allowing it to withstand greater downward pressure without damage. Similarly, the fixing column 22 and the insulation cover 1 are also securely connected using fasteners 6.

[0085] Furthermore, such as Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, the fixing post 22 includes a first fixing post 221 and a second fixing post 222. The first fixing post 221 is used to fix the heat insulation cover 1, and the second fixing post 222 is used to fix the temperature measuring element 5. The second passage 32 includes a first through hole 321 through which the first fixing post 221 passes and a second through hole 322 through which the second fixing post 222 passes. The distance between the first through hole 321 and the center of the pressure bearing element 3 is greater than the distance between the second through hole 322 and the center of the pressure bearing element 3.

[0086] Specifically, there are two first through holes 321, which are arranged opposite each other on both sides of the center of the pressure bearing member 3 along the radial direction. The first fixing post 221 is also located on both sides of the center of the heating plate 2 along the radial direction. The second through hole 322 and the third through hole 33 are arranged opposite each other on both sides of the center of the pressure bearing member 3 along the radial direction. The second fixing post 222 and the detection post 23 are also located on both sides of the center of the heating plate 2 along the radial direction.

[0087] The second fixing post 222 is used to fix the temperature measuring element 5. It is arranged opposite to the detection post 23 along the center. The second through hole 322 and the third through hole 33 are also symmetrically arranged along the center of the pressure bearing element 3. The arrangement is more reasonable and makes better use of the space at the bottom of the heating plate 2. At the same time, the second through hole 322 is closer to the center of the pressure bearing element 3, which is also the center of the heating plate 2 and the inner liner. Therefore, it is more convenient to fix the temperature measuring element 5 at the center, so that the temperature detection of the temperature measuring element 5 is more accurate.

[0088] Specifically, such as Figure 6 As shown, a temperature measuring port 24 is opened in the center of both the heating plate 2 and the pressure bearing component 3, and the temperature measuring component 5 passes through the temperature measuring port 24 and contacts the bottom center of the inner liner.

[0089] like Figure 3 , Figure 4 , Figure 7 As shown, the pressure-bearing component 3 is also provided with a fourth passage 34 for the pins of the heating plate 2 to pass through.

[0090] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0091] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0092] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A pressure cooking appliance, comprising a heat-insulating cover and a heating plate disposed inside the heat-insulating cover, wherein a pressure-bearing member is provided between the bottom wall of the heating plate and the heat-insulating cover, characterized in that, The side wall of the heat insulation cover is provided with a support step protruding towards the inside of the heat insulation cover. The pressure-bearing component rests against the support step to provide a deformation space between the pressure-bearing component and the bottom wall of the heat insulation cover. The lower side of the heating plate is provided with three support columns. The pressure-bearing component is provided with a first passage corresponding to each of the support columns. The pressure-bearing component has two lines that pass through any two first passages and intersect. The two lines divide the pressure-bearing component into four regions, with the smallest area being the first region. A limiting part is provided between the pressure-bearing component and the heat insulation cover. The limiting part is located outside the other regions outside the first region.

2. The pressure cooking appliance according to claim 1, characterized in that, The pressure-bearing component further has a second region disposed opposite to the intersection of the first region with respect to the line connecting them, and the limiting portion is located in the second region; or... The pressure-bearing component also has a third region adjacent to the first region, and the limiting portion is located in the third region.

3. The pressure cooking appliance according to claim 1, characterized in that, The limiting part includes a limiting rib disposed on the supporting step, and a limiting notch disposed on the bearing member for cooperating with the limiting rib.

4. The pressure cooking appliance according to claim 1, characterized in that, The limiting part includes a limiting protrusion protruding from the lower side of the pressure-bearing member, and a limiting opening provided on the step surface of the supporting step.

5. The pressure cooking appliance according to claim 1, characterized in that, The side wall of the heat insulation cover is also provided with positioning ribs, which are located on the outside of the pressure-bearing member so as to stop with the edge of the pressure-bearing member to limit the radial movement of the pressure-bearing member.

6. The pressure cooking appliance according to claim 5, characterized in that, The supporting step has a step surface and a transition portion located above the step surface, and the positioning rib is disposed on the step surface or the transition portion.

7. The pressure cooking appliance according to claim 1, characterized in that, The supporting steps extend circumferentially around the insulation cover; or, The supporting steps are multiple segments and are arranged at intervals along the circumference of the insulation cover.

8. The pressure cooking appliance according to claim 1, characterized in that, The bottom of the heating plate is provided with a downward protruding fixing post, the pressure-bearing component is provided with a second passage for the fixing post to pass through, the support post is used to be fixedly connected to the pressure-bearing component, the fixing post is used to be fixedly connected to the heat insulation cover, and the distance between the first passage and the center of the pressure-bearing component is greater than the distance between the second passage and the center of the pressure-bearing component.

9. The pressure cooking appliance according to claim 8, characterized in that, The heating plate is also provided with a downward protruding detection post, and a pressure switch is provided at the bottom of the heat insulation cover. The detection post is used to contact the pressure switch. The pressure bearing component is also provided with a third passage for the detection post to pass through. The third passage is located at the midpoint of the line connecting two of the first passages.

10. The pressure cooking appliance according to any one of claims 1-9, characterized in that, The thickness of the pressure-bearing component is 1-2 mm, the diameter of the heating plate is D1, and the diameter of the pressure-bearing component is D2, wherein 0.9D1≤D2≤D1.

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