Pressure cooking utensil

Abstract

The pressure cooking utensil comprises a heat preservation cover, a heating disc arranged in the heat preservation cover and an elastic piece located between the bottom wall of the heat preservation cover and the bottom wall of the heating disc, the heating disc is provided with a fixing column, the elastic piece is provided with an installation opening, and the fixing column penetrates through the installation opening to be fixedly connected with the elastic piece. A pressure-bearing step which protrudes upwards and is used for abutting against the elastic piece is arranged on the bottom wall of the heat preservation cover, and reinforcing ribs are arranged on the sides, facing the heating disc and / or the heat preservation cover, of the elastic pieces in a protruding mode. At least one side of the elastic sheet is provided with the reinforcing ribs, on one hand, the structural strength of the elastic sheet can be improved, the fatigue life can be prolonged, the thickness of the elastic sheet can be properly reduced, and materials are saved. And on the other hand, due to the arrangement of the reinforcing ribs, when the multiple elastic pieces are stacked, every two adjacent elastic pieces cannot be tightly attached, so that in the anti-rust treatment process such as batch galvanizing, zinc liquid can smoothly flow to the position between the two elastic pieces, and a uniform zinc coating can be formed on the surfaces of the elastic pieces.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a pressure cooking appliance. Background Art

[0002] To ensure that pressure cooking appliances operate under a safe pressure environment, they are typically equipped with a pressure control mechanism. Common pressure control methods include mechanical deformation control and temperature measurement control. For appliances such as pressure cookers, most use a mechanical pressure control mechanism.

[0003] The mechanical pressure control structure includes a support plate arranged between the heating plate and the insulation cover. When the pressure in the pot rises, the air pressure will push the inner pot and the heating plate downward, thereby squeezing the support plate, causing the support plate to deform. When the support plate is deformed to a certain extent, the safety switch is triggered, causing the pressure cooking appliance to stop heating or release pressure.

[0004] Mechanical pressure control structures can be divided into two types based on the structure and shape of the support plate. One is a circular support structure, which mainly includes an upward-arched disc-shaped elastic member, a support, a washer, a stud, and a nut. The stud passes through these components and secures them to the heating plate and insulation cover. However, this pressure control structure has many components and is relatively expensive. It is also complicated to assemble and disassemble, especially the stud, which is difficult to disassemble and assemble, and the threads are easily damaged and stuck in the heating plate, causing problems for subsequent maintenance.

[0005] Another type of pressure control structure is a flat sheet support structure, which mainly includes a flat elastic member and a gasket. The thermal insulation cover is provided with a support boss to support part of the elastic member, while the unsupported area of the elastic member can deform under the pressure of the heating plate. In order to ensure the structural strength of the elastic member used for pressure bearing and avoid plastic deformation or even fracture of the elastic member due to multiple deformations, the elastic member is usually designed as a thick sheet greater than or equal to 2mm, which is processed by flat laser cutting without post-heat treatment to relieve stress. However, this not only increases the material cost, but also the fatigue life performance of the elastic member is still poor, often less than 10,000 times. After processing, in order to improve the aesthetics and rust prevention effects, the surface of the elastic member can be galvanized. The flat sheet structure makes it easy for adjacent elastic members to fit together when multiple elastic members are stacked, and the gap between them is extremely small, making it difficult for zinc liquid to enter between the two elastic members during the galvanizing process. As a result, the galvanizing effect of the end face of the elastic member and the uniformity of the coating are poor, and the elastic member is very prone to rust, affecting performance. Utility Model Content

[0006] The utility model provides a pressure cooking appliance to solve the problems of low fatigue life of elastic sheets, increased thickness, increased production cost, and easy adhesion of two elastic sheets during mass coating of the elastic sheet surface, which affects the flow of coating liquid.

[0007] The technical solution adopted by this utility model is:

[0008] A pressure cooking appliance comprises a heat-insulating cover, a heating plate arranged in the heat-insulating cover, and an elastic sheet located between the bottom wall of the heat-insulating cover and the bottom wall of the heating plate. The heating plate is provided with a fixing column, the elastic sheet is provided with a mounting opening, the fixing column is passed through the mounting opening to be fixedly connected to the elastic sheet, the bottom wall of the heat-insulating cover is provided with a pressure-bearing step protruding upward and used to abut against the elastic member, and the elastic sheet is provided with a reinforcing rib protruding on the side facing the heating plate and / or the heat-insulating cover.

[0009] The pressure cooking device of the present invention also has the following additional technical features:

[0010] The pressure-bearing step includes a first pressure-bearing part and a second pressure-bearing part. The first pressure-bearing part is located at one end of the elastic sheet, and the second pressure-bearing part is located at the other end opposite to the elastic sheet. There is an escape space between the first pressure-bearing part and the second pressure-bearing part for the elastic sheet to deform, and the reinforcing rib extends from the first pressure-bearing part toward the second pressure-bearing part.

[0011] The elastic sheet is provided with a mounting sunken platform, the mounting opening is provided on the mounting sunken platform, the reinforcing ribs are located on both sides of the mounting sunken platform, or the reinforcing ribs surround the mounting sunken platform.

[0012] The mounting platform and the reinforcement rib both protrude toward a first direction, and a raised portion protruding toward a second direction is provided between the mounting platform and the reinforcement rib, and the second direction is opposite to the first direction.

[0013] The top of the raised portion is provided with an abutting plane.

[0014] The pressure-bearing step includes a first pressure-bearing part and a second pressure-bearing part. The first pressure-bearing part and the second pressure-bearing part are relatively located at both ends of the elastic sheet along the third direction. There are two reinforcing ribs and they are arranged on both sides of the mounting platform along the fourth direction. The third direction is perpendicular to the fourth direction.

[0015] The thickness of the elastic sheet is not greater than 2 mm.

[0016] The bottom wall of the heating plate is provided with a downwardly protruding supporting foot, the fixing column is provided on the supporting foot and protrudes downward, and the supporting foot abuts against the elastic sheet to apply pressure to the elastic sheet.

[0017] There are at least two pressure-bearing steps relatively located at the two ends of the elastic sheet. The two ends of the supporting feet along the arrangement direction of the pressure-bearing steps are provided with contact straight edges, and the elastic sheet contacts the contact straight edges when deformed.

[0018] There are multiple elastic sheets arranged at intervals along the circumference of the heating disk. The elastic sheets extend along the tangential direction of the heating disk to have a deformation section and matching sections located at both ends of the deformation section. The matching sections are used to abut and match with the pressure-bearing steps.

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

[0020] 1. In the present invention, the fixing post of the heating plate passes through the mounting opening of the elastic sheet to fix the two together, and the pressure-bearing step of the heat-insulating cover abuts against a portion of the elastic sheet. When the heating plate is subjected to downward pressure from the pressure inside the inner pot, the pressure-bearing step forms an upward supporting force on the elastic sheet, causing the elastic sheet to deform. When the deformation of the elastic member reaches a preset value, the pressure control switch provided in the heat-insulating cover is triggered, thereby causing the pressure cooking device to stop heating or release pressure. Reinforcement ribs are provided on at least one side of the elastic sheet. On the one hand, this can improve the structural strength and fatigue life of the elastic sheet, and can maintain the reliability of the pressure control structure after long-term use of the pressure cooking device, thereby improving the reliability and safety of the pressure cooking device. In addition, since the provision of the reinforcement ribs can enhance the strength of the elastic sheet, the thickness of the elastic sheet can be appropriately reduced, thereby saving material and manufacturing costs. On the other hand, due to the setting of the reinforcing ribs, when multiple elastic sheets are stacked, they are supported by the protruding reinforcing ribs, so that the two adjacent elastic sheets will not fit tightly together, but have a larger gap under the support of the reinforcing ribs. Therefore, during the anti-rust treatment process such as batch galvanizing, the zinc liquid can flow smoothly between the two elastic sheets and fully contact the end faces of the elastic sheets, which helps to form a uniform galvanized layer on the surface of the elastic sheets.

[0021] 2. As a preferred embodiment of the present invention, the pressure-bearing step includes a first pressure-bearing portion and a second pressure-bearing portion. The first pressure-bearing portion is located at one end of the elastic sheet, and the second pressure-bearing portion is located at the other end opposite to the elastic sheet. There is an escape space between the first pressure-bearing portion and the second pressure-bearing portion for the elastic sheet to deform, and the reinforcing ribs extend from the first pressure-bearing portion toward the second pressure-bearing portion. The pressure-bearing step is located at both ends of the elastic sheet, forming a "bridge-type" pressure-bearing structure. When the elastic sheet is pressed downward by the heating plate, the two ends are supported by the pressure-bearing step, and the central area is concave downward. The extension direction of the reinforcing rib is the normal direction of the force exerted on the elastic sheet by the heating plate and the pressure-bearing step, so that the reinforcing rib can effectively strengthen the deformation of the elastic sheet and greatly improve the fatigue life of the elastic sheet.

[0022] 3. As a preferred embodiment of the present invention, the mounting sink and the reinforcement rib both protrude toward a first direction, and a raised portion protruding toward a second direction is provided between the mounting sink and the reinforcement rib, and the second direction is opposite to the first direction. The mounting sink and the reinforcement rib protrude toward the same direction, and on the one hand, a raised portion protruding toward opposite directions is formed between the two, so that the area of the elastic sheet between the reinforcement rib and the mounting sink has an uneven structure, thereby further strengthening the structural strength of the elastic sheet and reducing the risk of plastic deformation or fracture damage to the elastic sheet. On the other hand, the mounting sink and the reinforcement rib protrude toward the same side, so that the other side of the elastic sheet has a relatively flat planar structure, and then this side is directed toward the heating plate to contact the support foot of the heating plate, which not only improves the contact support stability, but also prevents the support foot from interfering with the raised structure on the elastic sheet.

[0023] 4. As a preferred embodiment of the present invention, an abutment plane is provided on the top of the raised portion. The abutment plane is provided to reserve an area on the elastic sheet for contact with the support legs of the heating plate, so that the elastic sheet can adapt to support legs of different cross-sectional shapes. The support legs can form abutment with the planar area outside the reinforcing ribs and the mounting sink on the elastic sheet, and can also form abutment with the abutment plane of the raised portion, so that the elastic sheet and the support legs form a stable contact, so that the support legs can stably and reliably apply pressure to the elastic sheet.

[0024] 5. As a preferred embodiment of the present invention, there are at least two pressure-bearing steps that are relatively located at both ends of the elastic sheet, and the supporting feet are provided with contact straight edges at both ends along the arrangement direction of the pressure-bearing steps, which contact the contact straight edges when the elastic sheet is deformed. When the elastic sheet is deformed under pressure, the contact straight edges fit the elastic sheet, so that there is a line contact between the two, so as to increase the contact area between the elastic sheet and the supporting feet, thereby making the elastic sheet generate uniform stress when subjected to force, so as to avoid the elastic sheet generating uneven stress, which may cause the elastic sheet to crack and fail easily, thereby increasing the service life of the elastic sheet and ensuring the fatigue life of the elastic sheet. In addition, the increase in contact area also reduces the pressure between the elastic sheet and the supporting feet, reducing the wear on the supporting feet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 This is a cross-sectional view of a portion of a pressure cooking device according to one embodiment of the present invention;

[0027] Figure 2 for Figure 1An exploded view of the structure of a portion of a medium pressure cooking appliance;

[0028] Figure 3 for Figure 2 Magnified view of area A in the middle;

[0029] Figure 4 This is a schematic structural diagram of an elastic sheet according to one embodiment of the present invention;

[0030] Figure 5 for Figure 4 a cross-sectional view of the elastic sheet;

[0031] Figure 6 This is a cross-sectional view of a portion of a pressure cooking device according to one embodiment of the present invention;

[0032] Figure 7 for Figure 6 Magnified view of area B.

[0033] in:

[0034] 1 heat-insulating cover; 11 pressure-bearing step; 111 first pressure-bearing part; 112 second pressure-bearing part;

[0035] 2 heating plate; 21 fixing column; 22 supporting foot; 221 contact straight edge;

[0036] 3 elastic piece; 31 reinforcing rib; 32 mounting opening; 33 mounting sink; 34 deformation section; 35 matching section; 36 raised portion; 361 abutting plane. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0038] In the following description, many specific details are set forth to facilitate 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] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "embodiment", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0042] like Figure 1 、 Figure 2 As shown, a pressure cooking appliance includes a heat preservation cover 1, a heating plate 2 arranged in the heat preservation cover 1, and an elastic sheet 3 located between the bottom wall of the heat preservation cover 1 and the bottom wall of the heating plate 2. The heating plate 2 is provided with a fixing column 21, and the elastic sheet 3 is provided with a mounting opening 32. The fixing column 21 is passed through the mounting opening 32 to be fixedly connected to the elastic sheet 3. The bottom wall of the heat preservation cover 1 is provided with a pressure-bearing step 11 protruding upward and used to abut against the elastic member. The elastic sheet 3 is provided with a reinforcing rib 31 protruding on one side facing the heating plate 2 and / or the heat preservation cover 1.

[0043] In the present invention, the fixing post 21 of the heating plate 2 passes through the mounting opening 32 of the elastic sheet 3 to secure the two together. The pressure-bearing step 11 of the heat-insulating cover 1 abuts against a portion of the elastic sheet 3. When the heating plate 2 is subjected to downward pressure from the pressure inside the inner pot, the pressure-bearing step 11 exerts an upward support force on the elastic sheet 3, causing the elastic sheet 3 to deform. When the deformation of the elastic member reaches a preset value, the pressure control switch provided in the heat-insulating cover 1 is triggered, thereby causing the pressure cooking device to stop heating or release pressure. Reinforcing ribs 31 are provided on at least one side of the elastic sheet 3. This, on the one hand, improves the structural strength and fatigue life of the elastic sheet 3, and on the other hand, maintains the reliability of the pressure control structure after long-term use of the pressure cooking device, thereby improving the reliability and safety of the pressure cooking device. Furthermore, because the provision of the reinforcing ribs 31 can enhance the strength of the elastic sheet 3, the thickness of the elastic sheet 3 can be appropriately reduced, thereby saving material and manufacturing costs. On the other hand, due to the provision of the reinforcing ribs 31, when multiple elastic sheets 3 are stacked, they are supported by the protruding reinforcing ribs 31, so that two adjacent elastic sheets 3 will not fit tightly together, but have a larger gap under the support of the reinforcing ribs 31. Therefore, during the anti-rust treatment process such as batch galvanizing, the zinc liquid can flow smoothly between the two elastic sheets 3 and fully contact the end faces of the elastic sheets 3, which helps to form a uniform galvanized layer on the surface of the elastic sheets 3.

[0044] Preferably, if Figure 5 As shown, the thickness H of the elastic sheet 3 is no greater than 2 mm. The provision of the reinforcing rib 31 effectively improves the strength and fatigue life of the elastic sheet 3, thereby reducing the thickness of the elastic sheet 3. Preferably, the thickness of the elastic sheet 3 is designed to be 1.5 mm. Compared to the elastic sheet 3 of greater than or equal to 2 mm in the prior art, this allows the elastic sheet 3 to be thinner and lighter while maintaining a longer lifespan and strength, saving material.

[0045] Preferably, in the present invention, the elastic sheet 3 is made of 65Mn, and the processing technology is as follows: first, a large piece of 65Mn plate is cut and blanked into shape; then the elastic sheet 3 is heat-treated to ensure elasticity and life; finally, the elastic sheet 3 is galvanized and dehydrogenated to improve the corrosion resistance and rust resistance of the elastic sheet 3.

[0046] Among them, such as Figure 4 、 Figure 5 As shown, the reinforcing rib 31 may be a structure that is convex toward one side and concave toward the other side. Alternatively, the reinforcing rib 31 may be formed by protruding only on one side of the elastic sheet 3, and the corresponding other side may be a flat structure.

[0047] As a preferred embodiment of the present invention, Figure 1 、 Figure 4As shown, the pressure-bearing step 11 includes a first pressure-bearing portion 111 and a second pressure-bearing portion 112. The first pressure-bearing portion 111 is located at one end of the elastic sheet 3, and the second pressure-bearing portion 112 is located at the other end opposite to the elastic sheet 3. There is an escape space between the first pressure-bearing portion 111 and the second pressure-bearing portion 112 for deformation of the elastic sheet 3, and the reinforcing rib 31 extends from the first pressure-bearing portion 111 toward the second pressure-bearing portion 112.

[0048] The pressure-bearing steps 11 are located at both ends of the elastic sheet 3, forming a "bridge-type" pressure-bearing structure. When the elastic sheet 3 is pressed downward by the heating plate 2, the two ends are supported by the pressure-bearing steps 11, and the central area is recessed downward. The reinforcing ribs 31 extend in the shape of long strips on the end faces of the elastic sheet 3. The extension direction of the reinforcing ribs 31 is the normal direction of the force applied to the elastic sheet 3 by the heating plate 2 and the pressure-bearing steps 11, so that the reinforcing ribs 31 can resist the downward deformation force on the elastic sheet 3. The reinforcing ribs 31 can effectively strengthen the deformation of the elastic sheet 3, greatly improving the fatigue life of the elastic sheet 3. According to tests, the fatigue life of the elastic sheet 3 can reach more than 40,000 times.

[0049] It can be understood that the pressure-bearing steps 11 are arranged along the first direction at both ends of the elastic sheet 3, and the extension direction of the reinforcing ribs 31 is also in the first direction. In addition, the pressure of the heating plate 2 on the elastic sheet 3 is vertically downward, the supporting force of the pressure-bearing steps 11 on the elastic sheet 3 is vertically upward, and the extension direction of the reinforcing ribs 31 is perpendicular to the force exerted by the heating plate 2 and the pressure-bearing steps 11 on the elastic sheet 3 (when the elastic sheet 3 is not deformed).

[0050] In a preferred embodiment, Figure 4 、 Figure 5 As shown, the elastic sheet 3 is provided with a mounting platform 33 , the mounting opening 32 is provided on the mounting platform 33 , and the reinforcing ribs 31 are located on both sides of the mounting platform 33 , or the reinforcing ribs 31 surround the mounting platform 33 .

[0051] The mounting platform 33 surrounds the outer periphery of the mounting opening 32, not only guiding and positioning the insertion and mating of the fixing column 21 and the mounting opening 32, but also making the assembly of the elastic sheet 3 and the heating plate 2 simpler and more convenient, thereby improving assembly efficiency. Furthermore, the mounting platform 33 makes one side of the elastic sheet 3 a concave structure and the other side a convex structure, thereby further improving the structural strength and fatigue life of the elastic sheet 3 compared to a flat structure.

[0052] Specifically, after the fixing column 21 passes through the installation opening 32, the position where the heating plate 2 acts on the elastic sheet 3 is located near the installation sink 33. The reinforcement rib 31 is set here to improve the strength of the elastic sheet 3 in the area of the installation sink 33, thereby reducing the risk of the elastic sheet 3 being damaged by the greater pressure of the heating plate 2. For example, the reinforcement rib 31 can be set as an annular rib position and surround the outer circumference of the installation sink 33. As a preferred embodiment, Figure 1 、 Figure 4 、 Figure 7 As shown, the pressure-bearing step 11 includes a first pressure-bearing part 111 and a second pressure-bearing part 112. The first pressure-bearing part 111 and the second pressure-bearing part 112 are relatively located at the two ends of the elastic sheet 3 along the third direction. There are two reinforcing ribs 31 and they are arranged on both sides of the mounting sink 33 along the fourth direction. The third direction is perpendicular to the fourth direction.

[0053] The reinforcing ribs 31 are arranged on both sides of the mounting platform 33 along the fourth direction, thereby leaving space for the heating plate 2 and the elastic sheet 3 to abut against each other in the third direction. In this embodiment, the supporting legs 22 of the heating plate 2 can be arranged on both sides of the mounting platform 33 along the third direction, thereby forming a avoidance with the reinforcing ribs 31 and stably contacting the plane of the elastic sheet 3, thereby better applying pressure to the elastic sheet 3.

[0054] Specifically, the third direction and the fourth direction are both horizontal directions, such as Figure 1 、 Figure 4 As shown, the first pressure-bearing part 111 and the second pressure-bearing part 112 are arranged at both ends of the elastic sheet 3, and the connecting line between the first pressure-bearing part 111 and the second pressure-bearing part 112 represents the third direction (the length direction of the elastic sheet 3), and the fourth direction is perpendicular to the third direction and is also located in the horizontal plane (the width direction of the elastic sheet 3).

[0055] Preferably, if Figure 4 、 Figure 5 As shown, both the mounting platform 33 and the reinforcement rib 31 protrude toward a first direction, and a raised portion 36 protrudes toward a second direction between the mounting platform 33 and the reinforcement rib 31 , which is opposite to the first direction.

[0056] The mounting platform 33 and the reinforcing rib 31 protrude in the same direction. On the one hand, a raised portion 36 that protrudes in opposite directions is formed between the two, so that the area of the elastic sheet 3 between the reinforcing rib 31 and the mounting platform 33 is an uneven structure, which can further strengthen the structural strength of the elastic sheet 3 and reduce the risk of plastic deformation or fracture damage of the elastic sheet 3. On the other hand, the mounting platform 33 and the reinforcing rib 31 protrude in the same direction, so that the other side of the elastic sheet 3 is a relatively flat planar structure, and then this side is directed toward the heating plate 2 and contacts the support foot 22 of the heating plate 2, which not only improves the contact support stability, but also prevents the support foot 22 from interfering with the raised structure on the elastic sheet 3. It should be noted that the raised portion 36 is a structure that is raised relative to the reinforcing rib 31 or the mounting platform 33. For the end face of the elastic sheet 3, the raised portion 36 can be flush with the end face of the protruding side, or lower than the end face, or higher than the end face.

[0057] In this embodiment, the first direction and the second direction are both vertical, one of which is vertically upward and the other is vertically downward. Figure 5 As shown, the mounting platform 33 and the reinforcing rib 31 both protrude downward (toward the side of the heat preservation cover 1 ), thereby forming a planar structure on the upper side for contacting the supporting legs 22 of the heating plate 2 . The raised portion 36 protrudes upward relative to the reinforcing rib 31 .

[0058] Further, if Figure 5 As shown, the top of the raised portion 36 is provided with an abutting flat surface 361 .

[0059] In this embodiment, the abutment plane 361 is set on the elastic sheet 3 to reserve an area for contact with the support foot 22 of the heating plate 2, so that the elastic sheet 3 can adapt to the support foot 22 with different cross-sectional shapes. The support foot 22 can form an abutment with the plane area outside the reinforcing rib 31 and the mounting sink 33 on the elastic sheet 3, and can also form an abutment with the abutment plane 361 of the raised portion 36, so that the elastic sheet 3 and the support foot 22 form a stable contact, so that the support foot 22 can stably and reliably apply pressure to the elastic sheet 3.

[0060] As a preferred embodiment of the present invention, Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 As shown, the bottom wall of the heating plate 2 is provided with a downwardly protruding support leg 22 , the fixing column 21 is provided on the support leg 22 and protrudes downward, and the support leg 22 abuts against the elastic sheet 3 to apply pressure to the elastic sheet 3 .

[0061] The fixing column 21 is arranged on the supporting foot 22, so that after the fixing column 21 is plugged into the mounting opening 32, the supporting foot 22 and the elastic sheet 3 are also positioned. At the same time, when the supporting foot 22 presses the elastic sheet 3, the fixing column 21 and the mounting opening 32 can also form a stop, thereby limiting the displacement of the elastic sheet 3 under pressure and improving the position stability of the elastic sheet 3 and the supporting foot 22.

[0062] It should be noted that this embodiment does not limit the shape of the support leg 22. In one embodiment, the support leg 22 is cylindrical. When the elastic sheet 3 is pressed, the arcuate edge of the support leg 22 is in point contact with the elastic sheet 3. In a preferred embodiment, Figure 3 、 Figure 7 As shown, there are at least two pressure-bearing steps 11 located relatively at both ends of the elastic sheet 3 , and the supporting feet 22 are provided with contact straight edges 221 at both ends along the arrangement direction of the pressure-bearing steps 11 , which contact the elastic sheet 3 when deformed.

[0063] When the elastic sheet 3 is deformed under pressure, the contact straight edge 221 fits against the elastic sheet 3, creating a linear contact between the two. This increases the contact area between the elastic sheet 3 and the support leg 22, thereby generating uniform stress on the elastic sheet 3 when subjected to force. This prevents uneven stress on the elastic sheet 3, which could cause the elastic sheet 3 to crack and fail, thereby increasing the service life of the elastic sheet 3 and ensuring its fatigue life. Furthermore, the increased contact area reduces the pressure between the elastic sheet 3 and the support leg 22, reducing wear on the support leg 22.

[0064] In this embodiment, the support leg 22 can be designed as a square structure so that its two opposite edges form contact straight edges 221. The support leg 22 can also be an irregular shape. That is, this embodiment only limits the two sides of the support leg 22 on the same side as the pressure-bearing step 11 to a straight-edge structure, and does not limit other circumferential areas of the support leg 22.

[0065] Preferably, there are multiple elastic sheets 3 and they are arranged at intervals along the circumference of the heating disk 2. The elastic sheets 3 extend along the tangential direction of the heating disk 2 to have a deformation section 34 and fitting sections 35 located at both ends of the deformation section 34. The fitting sections 35 are used to abut and fit with the pressure-bearing step 11.

[0066] The elastic sheets 3 are arranged at intervals along the circumference of the heating plate 2, so that when the heating plate 2 moves downward with the inner tank, a uniform downward pressure can be applied to each elastic sheet 3, so that each elastic sheet 3 is evenly stressed, thereby preventing damage to a single elastic sheet 3 due to excessive stress, thereby improving the service life. The elastic sheets 3 are arranged along the tangential direction of the heating plate 2, while rationally utilizing and optimizing the space between the thermal insulation cover 1 and the heating plate 2, making the structural layout more compact, reducing the lateral space occupied by the elastic sheets 3, and helping to reduce the radial size of the thermal insulation cover 1, realizing a miniaturized design, which is conducive to application in small-capacity models.

[0067] Specifically, such as Figure 4 As shown, the elastic sheet 3 extends into a strip shape to facilitate the abutment and cooperation between the mating sections 35 at both ends in the length direction and the pressure-bearing step 11. The supporting feet 22 act on the deformation section 34, and the deformation section 34 can be deformed more easily, thereby making it more sensitive to pressure and improving the accuracy of temperature control.

[0068] Anything not described in this utility model can be achieved by adopting or drawing on existing technologies.

[0069] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0070] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A pressure cooking device comprising a heat-insulating cover, a heating plate disposed in the heat-insulating cover, and an elastic sheet located between the bottom wall of the heat-insulating cover and the bottom wall of the heating plate, characterized in that: The heating plate is provided with a fixing column, the elastic sheet is provided with a mounting opening, the fixing column is passed through the mounting opening to be fixedly connected to the elastic sheet, the bottom wall of the thermal insulation cover is provided with a pressure-bearing step protruding upward and used to abut against the elastic member, and the elastic sheet is provided with a reinforcing rib protruding on one side toward the heating plate and / or the thermal insulation cover.

2. The pressure cooking device according to claim 1, wherein The pressure-bearing step includes a first pressure-bearing part and a second pressure-bearing part, the first pressure-bearing part is located at one end of the elastic sheet, and the second pressure-bearing part is located at the other end opposite to the elastic sheet. There is an escape space between the first pressure-bearing part and the second pressure-bearing part for the elastic sheet to deform, and the reinforcing rib extends from the first pressure-bearing part toward the second pressure-bearing part.

3. The pressure cooking appliance according to claim 1, wherein The elastic sheet is provided with a mounting sunken platform, the mounting opening is provided on the mounting sunken platform, the reinforcing ribs are located on both sides of the mounting sunken platform, or the reinforcing ribs surround the mounting sunken platform.

4. The pressure cooking appliance according to claim 3, wherein The mounting sunken platform and the reinforcing rib both protrude toward a first direction, and a raised portion protruding toward a second direction is provided between the mounting sunken platform and the reinforcing rib, and the second direction is opposite to the first direction.

5. The pressure cooking device according to claim 4, characterized in that The top of the raised portion is provided with an abutting plane.

6. The pressure cooking appliance according to claim 3, wherein The pressure-bearing step includes a first pressure-bearing part and a second pressure-bearing part, and the first pressure-bearing part and the second pressure-bearing part are relatively located at the two ends of the elastic sheet along the third direction. There are two reinforcing ribs and they are arranged on both sides of the mounting sink along the fourth direction, and the third direction is perpendicular to the fourth direction.

7. The pressure cooking appliance according to claim 1, wherein The thickness of the elastic sheet is no more than 2 mm.

8. The pressure cooking appliance according to claim 1, wherein The bottom wall of the heating plate is provided with a downwardly protruding supporting foot, the fixing column is provided on the supporting foot and protrudes downward, and the supporting foot abuts against the elastic sheet to apply pressure to the elastic sheet.

9. The pressure cooking appliance according to claim 8, wherein There are at least two pressure-bearing steps located relatively at the two ends of the elastic sheet. The two ends of the supporting feet along the arrangement direction of the pressure-bearing steps are provided with contact straight edges, and the elastic sheet contacts the contact straight edges when deformed.

10. The pressure cooking appliance according to claim 1, wherein There are multiple elastic sheets arranged at intervals along the circumference of the heating disk. The elastic sheets extend along the tangential direction of the heating disk to have a deformation section and matching sections located at both ends of the deformation section. The matching sections are used to abut and match with the pressure-bearing step.

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