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 heating disc and the bottom wall of the heat preservation cover, the heating disc is provided with at least two fixing columns protruding downwards, and the pressure bearing piece is provided with passing openings corresponding to the fixing columns one to one. A pressure switch is arranged at the bottom of the heat preservation cover, the heating disc is further provided with a detection column protruding downwards, the pressure bearing piece is provided with a detection opening, the detection column can penetrate through the detection opening to make contact with the pressure switch, and the detection opening is located on a connecting line of two passing openings. The detection port is located on the connecting line of the two passing ports, so that the detection position of the pressure switch is close to the two fixing columns, the detection position of the pressure switch can comprehensively reflect the stress condition of the two fixing columns, the overall pressure in the pot can be detected and judged more accurately, and the detection accuracy is improved. Therefore, the accuracy of pressure detection is greatly improved, and accurate pressure control is realized.

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] In existing models, the pressure plate structure is divided into two types. One type is a small pressure plate, specifically, the heating plate has three pressure columns, and three pressure plates are set accordingly. During assembly, the pressure plates are fixed to these three columns. A pressure switch is installed at one of the pressure columns. When there is pressure inside the pot, the heating plate transmits force to the pressure plate, causing the pressure plate to deform. When a certain displacement is reached, the support column acts on the pressure switch, triggering it. The other type is a large-area pressure plate. The heating plate also has three pressure columns, and three fixing holes are set on the pressure plate for the pressure columns to pass through. Similarly, a pressure switch is installed at one of the pressure columns, which is used by the support column to trigger it.

[0004] However, regardless of the structure of the pressure plate mentioned above, the pressure switch only detects one of the pressure columns of the heating plate. If the bottom of the inner pot does not match the surface of the heating plate well, or if the inner pot is tilted or not centered, the pressure on the heating plate will be uneven, resulting in different downward displacements of the three pressure columns. As a result, the pressure switch will not accurately detect the pressure at one of the pressure columns, which will cause the control program of the pressure cooking appliance to misjudge the pressure inside the pot, affecting the efficiency of pressure cooking and even the safety of the pressure cooking appliance. Utility Model Content

[0005] This invention provides a pressure cooking appliance to solve the problem that the pressure measuring structure of pressure cooking appliances can only detect the displacement of one of the pressure-bearing columns of the heating plate, resulting in inaccurate pressure measurement and failure to better reflect the normal pressure inside the pot.

[0006] The technical solution adopted in this utility model is as follows:

[0007] 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 heating plate and the bottom wall of the heat preservation cover. The heating plate is provided with at least two downwardly protruding fixing posts. The pressure-bearing member has openings that correspond one-to-one with the fixing posts to fix the heating plate to the pressure-bearing member. A pressure switch is provided at the bottom of the heat preservation cover. The heating plate is also provided with a downwardly protruding detection post. The pressure-bearing member is provided with a detection port for the detection post to pass through and contact the pressure switch. The detection port is located on the line connecting two of the openings.

[0008] The pressure cooking appliance of this utility model also has the following additional technical features:

[0009] There are three fixed columns, which are evenly spaced along the circumference of the heating plate. There are three through-holes, which are set one-to-one with the fixed columns. The detection port is located at the midpoint of the line connecting two of the through-holes.

[0010] The heating plate is also provided with two downward protruding connecting columns for fixed connection with the heat insulation cover. The pressure bearing component is provided with a first opening for the connecting columns to pass through. There are two first openings, which are arranged opposite to each other on both sides of the center of the pressure bearing component along the radial direction of the pressure bearing component.

[0011] The heating plate is also provided with a downward protruding positioning post, which is used to fix the temperature measuring element. The pressure bearing element is provided with a second opening through which the positioning post passes. The second opening and the detection port are arranged opposite to each other on both sides of the center of the pressure bearing element along the radial direction of the pressure bearing element, and the length of the line connecting the second opening and the detection port is less than the length of the line connecting the two first openings.

[0012] The pressure switch is located on the lower side of the bottom wall of the insulation cover. The bottom wall of the insulation cover is provided with a passage for the detection column to pass through, and a seal is provided between the passage and the detection column.

[0013] 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.

[0014] The side wall of the insulation cover is provided with an inwardly recessed support step, and the edge of the pressure-bearing component rests against the support step so that there is a deformation space between the pressure-bearing component and the bottom wall of the insulation cover.

[0015] The supporting steps extend circumferentially along the insulation cover, and the side wall of the insulation cover is provided with limiting ribs at intervals along the circumferential direction. The limiting ribs are located above the supporting steps and can cooperate with the edge stop of the pressure-bearing component to limit the pressure-bearing component.

[0016] Pressure cooking appliances also include fasteners that pass through the opening to securely connect to the fixed post.

[0017] The heating plate includes a plate body and a heating tube. The plate body is provided with a downwardly protruding annular reinforcing part. The heating tube is embedded in the annular reinforcing part. At least a portion of the fixed column is located in the annular reinforcing part, and the detection column is located in the area enclosed by the annular reinforcing part.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0019] 1. In this utility model, the bottom of the heating plate is provided with multiple fixing posts. These posts are used to fix the heating plate to a pressure-bearing component and transmit force to it. The pressure-bearing component is made of an elastic material and can deform under the pressure of the fixing posts, driving the heating plate upwards and resetting under its own elastic force. Simultaneously, the bottom of the heating plate is also provided with a detection post that passes through the detection port of the pressure-bearing component to cooperate with the pressure switch at the bottom of the insulation cover. The detection port is located on the line connecting two of the ports, allowing the pressure switch's detection position to comprehensively reflect the force at both fixing posts. This allows for a more accurate detection and judgment of the overall pressure inside the pot, even if the inner pot and heating plate are not well matched or the heating plate experiences uneven force. This significantly improves the accuracy of pressure detection, enabling precise pressure control, ensuring reliable pressure cooking and increasing cooking efficiency, while also enhancing the safety of the pressure cooking appliance.

[0020] 2. In a preferred embodiment of this utility model, three fixing columns are evenly spaced along the circumference of the heating plate, and three openings are provided corresponding to the fixing columns. The detection port is located at the midpoint of the line connecting two of the openings. This three-point fixing makes the fixing and support of the heating plate and the pressure-bearing component more stable, and also makes the pressure transmission from the heating plate to the pressure-bearing component more uniform. This ensures more even and stable pressure on the pressure-bearing component, guaranteeing reliable deformation and preventing excessive local stress that could lead to plastic deformation and affect detection accuracy. Simultaneously, the detection port is located at the midpoint of the line connecting the two openings. According to the principle that "the shortest distance between two points is a straight line," the detection position of the pressure switch is close to or equal to the two fixing columns, thus enabling better perception of movement at the two fixing columns. Based on the combined effect of the movement at the two fixing columns on the detection position, the pressure inside the pot is more accurately reflected, further improving the accuracy of pressure measurement and control.

[0021] 3. In a preferred embodiment of this utility model, the heating plate is further provided with two downwardly protruding connecting columns for fixed connection with the heat preservation cover. The pressure-bearing component is provided with a first opening for the connecting columns to pass through. There are two first openings, which are arranged radially opposite to each other on both sides of the center of the pressure-bearing component. The connecting columns at the bottom of the heating plate are used for fixed connection with the heat preservation cover. During assembly, the pressure-cooking appliance of this utility model can first fix the pressure-bearing component and the heating plate through the fixing columns, so that the pressure-bearing component and the heating plate form an integral component. Then, this component is fixedly connected to the heat preservation cover through the connecting columns on the heating plate, thereby achieving the fixation of the three components, reducing the number of parts, reducing assembly difficulty, and improving production efficiency. At the same time, the first openings are distributed on both sides of the center of the pressure-bearing component, so that the connecting columns are fixed to the heat preservation cover on both sides of the pressure-bearing component. This ensures the stability of the connection between the heat preservation cover and the heating plate, and also makes the force on both sides more even, which helps to ensure the stability of the heating plate and further ensures the balanced movement of each fixing column when it moves downward.

[0022] 4. In a preferred embodiment of this utility model, the side wall of the heat insulation cover is provided with an inwardly recessed support step, and the edge of the pressure-bearing component rests against the support step, so that there is a deformation space between the pressure-bearing component and the bottom wall of the heat insulation cover. By providing a support step on the side wall of the heat insulation cover, the pressure-bearing component rests against the support step, and the support position of the heat insulation cover for the support component is shifted from the original bottom support to the side support, thereby avoiding the impact of deformation of the bottom of the heat insulation cover on the accuracy of pressure detection. Furthermore, the outer edge of the pressure-bearing component rests against the support step, while the middle part is suspended, thereby increasing the space for deformation of the pressure-bearing component, allowing the pressure-bearing component to undergo a greater degree of deformation, thus meeting the needs of higher pressure cooking and significantly improving the performance of the pressure cooking appliance. In addition, the support step also increases the strength of the heat insulation cover, enabling it to support the pressure-bearing component more stably and reducing the possibility of deformation.

[0023] 5. In a preferred embodiment of this utility model, the heating plate includes a plate body and a heating tube. The plate body is provided with a downwardly protruding annular reinforcing portion, the heating tube is embedded in the annular reinforcing portion, at least a portion of the fixing column is located in the annular reinforcing portion, and the detection column is located in the area enclosed by the annular reinforcing portion. The heating tube and the plate body are integrally cast, embedding the heating tube inside the plate body. Simultaneously, the annular reinforcing portion not only increases the local thickness of the plate body, allowing it to completely enclose the heating tube, but also improves the local strength of the plate body. Therefore, by placing at least a portion of the fixing column in the annular reinforcing portion, the fixing column also obtains higher strength, resulting in more stable pressure application to the pressure-bearing component and more stable pressure application, thereby further improving the reliability of pressure detection. Attached Figure Description

[0024] 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:

[0025] 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;

[0026] Figure 2 This is a bottom view of the heating plate according to one embodiment of the present invention;

[0027] Figure 3 This is a bottom view of the pressure-bearing component according to one embodiment of the present invention;

[0028] Figure 4 This is a bottom view of the heating plate and pressure-bearing component after assembly according to one embodiment of the present invention;

[0029] Figure 5 This is a top view of the heat insulation cover according to one embodiment of the present invention.

[0030] in:

[0031] 1. Insulation cover; 11. Supporting step; 12. Limiting rib; 13. Positioning rib; 14. Passageway;

[0032] 2 Heating plate; 21 Fixing post; 22 Detection post; 23 Connecting post; 24 Positioning post; 25 Plate body; 251 Annular reinforcing part; 26 Heating tube; 27 Temperature measuring port;

[0033] 3. Pressure-bearing component; 31. Through-hole; 32. Inspection port; 33. First opening; 34. Second opening; 35. Third opening; 36. Positioning port;

[0034] 4. Pressure switches;

[0035] 5 temperature measuring components;

[0036] 6. Fasteners. Detailed Implementation

[0037] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figures 1 to 4 As 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 heating plate 2 and the bottom wall of the heat preservation cover 1. The heating plate 2 is provided with at least two downward protruding fixing posts 21. The pressure-bearing member 3 has openings 31 that correspond one-to-one with the fixing posts 21 so that the heating plate 2 is fixedly connected to the pressure-bearing member 3. A pressure switch 4 is provided at the bottom of the heat preservation cover 1. The heating plate 2 is also provided with a downward protruding detection post 22. The pressure-bearing member 3 is provided with a detection port 32 through which the detection post 22 passes to contact the pressure switch 4. The detection port 32 is located on the line connecting two of the openings 31.

[0043] In this utility model, such as Figure 2 , Figure 3 , Figure 4As shown, the bottom of the heating plate 2 is provided with multiple fixing posts 21. The fixing posts 21 are used to fix it to the pressure-bearing component 3 and transmit the force to the pressure-bearing component 3. The pressure-bearing component 3 is a structure made of elastic material, which can deform when pressed down by the fixing posts 21 and can drive the heating plate 2 to move upward and reset under its own elastic force. At the same time, the bottom of the heating plate 2 is also provided with a detection post 22, which passes through the detection port 32 of the pressure-bearing component 3 to cooperate with the pressure switch 4 at the bottom of the heat insulation cover 1.

[0044] It is understandable that the port 31 is set to correspond one-to-one with the fixed post 21, and the detection port 32 is set to correspond to the detection post 22. Therefore, the position of the port 31 corresponds to the position of the fixed post 21, and the position of the detection port 32 corresponds to the position of the detection post 22, which is also the detection position of the pressure switch 4. In other words, on the heating plate 2, the detection post 22 is also located on the line connecting the two fixed posts 21.

[0045] The detection port 32 is located on the line connecting the two through ports 31, so that the detection position of the pressure switch 4 can comprehensively reflect the force at the two fixed columns 21. This allows for a comprehensive consideration of the influence of the deformation at the two fixed columns 21 on the detection position, enabling a more accurate detection and judgment of the overall pressure inside the pot. Even if the inner pot and heating plate 2 are not well matched or the force on the heating plate 2 is uneven, the pressure change inside the pot can still 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.

[0046] It should be noted that in this utility model, the line connecting the two ports 31 is the line connecting the centers of the two ports 31, wherein, for example... Figure 3 As shown, the center of the detection port 32 may be located on the connecting line, or at least a portion of the detection port 32 may be located on the connecting line. In other words, as long as the connecting line passes through the detection port 32, it falls under the protection of this utility model.

[0047] 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.

[0048] Preferably, the pressure-bearing component 3 is a manganese sheet, which has better elastic deformation capability.

[0049] In a preferred embodiment, such as Figure 2 , Figure 3As shown, there are three fixed columns 21, which are evenly spaced along the circumference of the heating plate 2. There are three through-holes 31, which are set one-to-one with the fixed columns 21. The detection port 32 is located at the midpoint of the line connecting two of the through-holes 31.

[0050] The three-point fixing makes the fixing and support of the heating plate 2 and the pressure bearing component 3 more stable, and also makes the pressure transmitted from the heating plate 2 to the pressure bearing component 3 more even. The pressure bearing component 3 is subjected to more even and stable pressure, ensuring reliable deformation of the pressure bearing component 3 and avoiding excessive local stress on the pressure bearing component 3, which could lead to plastic deformation and affect the accuracy of detection. At the same time, the detection port 32 is located at the midpoint of the line connecting the two ports 31. According to the principle that "the shortest distance between two points is a straight line", the detection position of the pressure switch 4 is close to or equal to the two fixed columns 21. This allows for better detection of the movement of the two fixed columns 21. Based on the comprehensive influence of the movement of the two fixed columns 21 on the detection position, the pressure inside the pot can be more accurately reflected, thereby further improving the accuracy of pressure measurement and control.

[0051] Specifically, such as Figures 2 to 4 As shown, the lines connecting the three openings 31 form an equilateral triangle, and the detection opening 32 is located at the midpoint of one side of this equilateral triangle. Similarly, the lines connecting the three fixed posts 21 also form an equilateral triangle, and the detection post 22 is located at the midpoint of one side of this equilateral triangle.

[0052] Similarly, the detection port 32 can be the center of which coincides with the midpoint of the connecting line, or at least a part of the detection port 32 can cover the midpoint of the connecting line. In other words, as long as the midpoint of the connecting line passes through the detection port 32, it is a solution protected by this utility model.

[0053] As a preferred embodiment of this utility model, such as Figures 2 to 4 As shown, the heating plate 2 is also provided with two downward protruding connecting columns 23 for fixed connection with the heat insulation cover 1. The pressure bearing member 3 is provided with a first opening 33 for the connecting columns 23 to pass through. There are two first openings 33, which are arranged opposite to each other on both sides of the center of the pressure bearing member 3 along the radial direction of the pressure bearing member 3.

[0054] The connecting post 23 at the bottom of the heating plate 2 is used for fixed connection with the heat insulation cover 1. During assembly, the pressure cooking appliance of this invention can first fix the pressure-bearing component 3 and the heating plate 2 together using the fixing post 21, forming a single integrated assembly. Then, this assembly is fixedly connected to the heat insulation cover 1 using the connecting post 23 on the heating plate 2, thus achieving fixation of all three components. This reduces the number of parts, simplifies assembly, and improves production efficiency. Simultaneously, the first opening 33 is distributed on both sides of the center of the pressure-bearing component 3, allowing the connecting post 23 to be fixed to the heat insulation cover 1 on both sides of the pressure-bearing component 3. This ensures the stability of the connection between the heat insulation cover 1 and the heating plate 2, while also making the force on both sides more even, helping to ensure the stability of the heating plate 2 and further ensuring balanced movement of each fixing post 21 during downward movement.

[0055] Specifically, the connecting post 23 is located on both sides of the center of the heating plate 2 along the radial direction of the heating plate 2.

[0056] Furthermore, such as Figures 2 to 4 As shown, the heating plate 2 is also provided with a downward protruding positioning post 24, which is used to fix the temperature measuring element 5. The pressure bearing element 3 is provided with a second opening 34 through which the positioning post 24 passes. The second opening 34 and the detection port 32 are arranged opposite to each other on both sides of the center of the pressure bearing element 3 along the radial direction of the pressure bearing element 3, and the length of the line connecting the second opening 34 and the detection port 32 is less than the length of the line connecting the two first openings 33.

[0057] The positioning post 24 is used to fix the temperature measuring element 5. It is arranged opposite to the detection post 22 along the center. The second opening 34 and the detection port 32 are also symmetrically arranged along the center of the pressure-bearing component 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 length of the line connecting the two is shorter than the length of the line connecting the two first openings 33, so that the second opening 34 is closer to the center of the pressure-bearing component 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.

[0058] Specifically, such as Figure 2 , Figure 3 As shown, a temperature measuring port 27 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 27 and contacts the bottom center of the inner liner.

[0059] like Figure 3 As shown, the pressure-bearing component 3 is also provided with a third opening 35 for the pins of the heating plate 2 to pass through.

[0060] Preferably, such as Figure 1 , Figure 5As shown, the pressure switch 4 is located on the lower side of the bottom wall of the heat insulation cover 1. The bottom wall of the heat insulation cover 1 is provided with a passage 14 for the detection column 22 to pass through. A seal is provided between the passage 14 and the detection column 22 to prevent the liquid on the heating plate 2 from flowing along the detection column 22 to the pressure switch 4, causing the pressure switch 4 to be contaminated, and ensuring the cleanliness of the pressure switch 4.

[0061] Specifically, the sealing element is installed on the pressure-bearing element 3, located at the edge of the passage 14. When the detection column 22 passes through the passage 14, its outer wall abuts against the sealing element, thereby forming a seal.

[0062] As a preferred embodiment of this utility model, such as Figure 1 , Figure 5 As shown, the side wall of the heat insulation cover 1 is provided with an inwardly recessed support step 11, and the edge of the pressure bearing member 3 rests against the support step 11 so that there is a deformation space between the pressure bearing member 3 and the bottom wall of the heat insulation cover 1.

[0063] In existing technologies, the pressure-bearing component 3 is mostly supported by the bottom of the insulation cover 1. However, the bottom is a large flat structure with relatively weak strength, making it easy to deform under pressure, and the production and assembly process is relatively complex. When the bottom of the insulation cover 1 undergoes plastic deformation, the position of the pressure switch 4 also changes, affecting the accuracy of pressure detection and control.

[0064] By providing support steps 11 on the side wall of the insulation cover 1, the pressure-bearing component 3 rests against the support steps 11. This shifts the support position of the insulation cover 1 on the support component from the bottom to the side, thus preventing deformation of the bottom of the insulation cover 1 from affecting the accuracy of pressure detection. Furthermore, the outer edge of the pressure-bearing component 3 rests against the support steps 11, while the middle part is suspended, increasing the space for deformation of the pressure-bearing component 3. This allows for greater deformation, meeting the demands of higher pressure cooking. For example, conventional pressure cookers can only perform cooking at 70 kPa, but this structural design allows for cooking at 100 kPa or even higher pressures, significantly improving the performance of the pressure cooker. In addition, the support steps 11 increase the strength of the insulation cover 1, enabling it to more stably support the pressure-bearing component 3 and reducing the possibility of deformation.

[0065] Preferably, such as Figure 5 As shown, the support step 11 extends circumferentially along the insulation cover 1, and the side wall of the insulation cover 1 is provided with limiting ribs 12 at intervals along the circumferential direction. The limiting ribs 12 are located above the support step 11 and can cooperate with the edge stop of the pressure bearing member 3 to limit the pressure bearing member 3.

[0066] The limiting rib 12 is located above the supporting step 11 and protrudes towards the center of the insulation cover 1, so as to stop against the outer edge of the pressure-bearing member 3 and form a radial limit on the pressure-bearing member 3. Of course, in another embodiment, the limiting rib 12 can also be provided on the step surface of the supporting step 11 and protrude upward. The limiting rib 12 is located on the outside of the pressure-bearing member 3, which can also form a radial limit on the pressure-bearing member 3. This is not limited here.

[0067] Specifically, there are multiple limiting ribs 12, which are arranged at intervals along the circumference of the insulation cover 1 to ensure that the pressure-bearing component 3 is arranged in the center inside the insulation cover 1.

[0068] Preferably, such as Figure 3 , Figure 5 As shown, one of the supporting step 11 and the bearing member 3 is provided with a positioning rib 13, and the other is provided with a positioning opening 36, so as to position them circumferentially. Specifically, in one embodiment, as... Figure 3 , Figure 5 As shown, the positioning rib 13 is disposed on the support step 11, located on the outside of the pressure-bearing member 3 and protruding towards the center of the insulation cover 1, and the positioning opening 36 is disposed on the outer edge of the pressure-bearing member 3 to form a notch. Of course, in other embodiments, the positioning rib 13 can also be disposed on the lower surface of the pressure-bearing member 3 or the step surface of the support step 11, and the positioning opening 36 can be disposed at another corresponding position of the two, so that the two can be positioned in a vertically coordinated manner.

[0069] Preferably, such as Figure 1 , Figure 4 As shown, the pressure cooking appliance also includes a fastener 6, which passes through the opening 31 to be securely connected to the fixing post 21.

[0070] The connection between the fixed post 21 and the pressure-bearing component 3 is achieved by fasteners such as screws 6, which can ensure strong connection stability. Furthermore, the pre-tightening force of the fasteners 6 can improve the structural strength of the connection between the pressure-bearing component 3 and the fixed post 21, enabling it to withstand greater downward pressure without damage.

[0071] Similarly, the connecting column 23 and the insulation cover 1 are also fixedly connected by fasteners.

[0072] In a preferred embodiment, such as Figure 1 , Figure 2 As shown, the heating plate 2 includes a plate body 25 and a heating tube 26. The plate body 25 is provided with a downwardly protruding annular reinforcing part 251. The heating tube 26 is embedded in the annular reinforcing part 251. At least a portion of the fixed post 21 is located in the annular reinforcing part 251. The detection post 22 is located in the area enclosed by the annular reinforcing part 251.

[0073] The disc body 25 is made of cast iron. The heating element 26 is integrally cast with the disc body 25, embedding the heating element 26 inside the disc body 25. At the same time, the setting of the annular reinforcing part 251 not only increases the local thickness of the disc body 25, allowing it to completely enclose the heating element 26, but also improves the local strength of the disc body 25. Therefore, at least a part of the fixing column 21 is set in the annular reinforcing part 251, so that the fixing column 21 also obtains higher strength, which makes it more stable when applying pressure to the pressure bearing 3, and the application of pressure is also more stable, thereby further improving the reliability of pressure detection.

[0074] The fixing post 21 may be located entirely in the annular reinforcing part 251, or it may be located partially in the annular reinforcing part 251 and partially inside the annular reinforcing part 251; this is not limited here.

[0075] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0076] 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.

[0077] 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 within the heat-insulating cover, wherein a pressure-bearing member is provided between the heating plate and the bottom wall of the heat-insulating cover, characterized in that, The heating plate is provided with at least two downward protruding fixing posts. The pressure bearing member has openings that correspond one-to-one with the fixing posts to fix the heating plate to the pressure bearing member. The bottom of the heat insulation cover is provided with a pressure switch. The heating plate is also provided with a downward protruding detection post. The pressure bearing member is provided with a detection port for the detection post to pass through and contact the pressure switch. The detection port is located on the line connecting two of the openings.

2. The pressure cooking appliance according to claim 1, characterized in that, There are three fixed columns, which are evenly spaced along the circumference of the heating plate. There are three through-holes, which are set one-to-one with the fixed columns. The detection port is located at the midpoint of the line connecting two of the through-holes.

3. The pressure cooking appliance according to claim 1, characterized in that, The heating plate is also provided with two downward protruding connecting columns for fixed connection with the heat insulation cover. The pressure bearing member is provided with a first opening for the connecting columns to pass through. There are two first openings, which are arranged opposite to each other on both sides of the center of the pressure bearing member along the radial direction of the pressure bearing member.

4. The pressure cooking appliance according to claim 3, characterized in that, The heating plate is also provided with a downward protruding positioning post, which is used to fix the temperature measuring element. The pressure bearing member is provided with a second opening through which the positioning post passes. The second opening and the detection port are arranged on both sides of the center of the pressure bearing member along the radial direction of the pressure bearing member, and the length of the line connecting the second opening and the detection port is less than the length of the line connecting the two first openings.

5. The pressure cooking appliance according to claim 1, characterized in that, The pressure switch is located on the lower side of the bottom wall of the heat insulation cover. The bottom wall of the heat insulation cover is provided with a passage for the detection column to pass through, and a sealing element is provided between the passage and the detection column.

6. The pressure cooking appliance according to claim 1, 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.

7. The pressure cooking appliance according to claim 1, characterized in that, The side wall of the heat insulation cover is provided with an inwardly recessed support step, and the edge of the pressure-bearing member rests against the support step so that there is a deformation space between the pressure-bearing member and the bottom wall of the heat insulation cover.

8. The pressure cooking appliance according to claim 7, characterized in that, The supporting step extends circumferentially along the insulation cover, and the side wall of the insulation cover is provided with limiting ribs at intervals along the circumferential direction. The limiting ribs are located above the supporting step and can cooperate with the edge stop of the pressure bearing member to limit the pressure bearing member.

9. The pressure cooking appliance according to claim 1, characterized in that, The pressure cooking appliance also includes fasteners that pass through the opening to securely connect to the retaining post.

10. The pressure cooking appliance according to claim 1, characterized in that, The heating plate includes a plate body and a heating tube. The plate body is provided with a downwardly protruding annular reinforcing part. The heating tube is embedded in the annular reinforcing part. At least a portion of the fixed column is located in the annular reinforcing part. The detection column is located in the area enclosed by the annular reinforcing part.

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