Heat preservation cover and electric pressure cooker

Abstract

The utility model discloses a heat preservation cover and an electric pressure cooker, and belongs to the technical field of kitchen appliances, the heat preservation cover comprises a cylinder wall and a cylinder bottom, the cylinder bottom is connected to the bottom of the cylinder wall, the cylinder bottom comprises a mounting ring and a connecting ring which are coaxially arranged, the connecting ring is located on the periphery of the mounting ring, the inner ring of the connecting ring is connected with the mounting ring, and the outer ring of the connecting ring is connected with the cylinder wall; the connecting ring is of a corrugated structure; the installation ring is of a stepped circular ring structure and comprises an outer ring body installed on the heating disc and an inner ring body connected with the temperature limiter, and the outer ring body is higher than the inner ring body. By optimizing the structural design of the heat preservation cover, additional support is provided, the burden of the heating disc is relieved, heat can be effectively concentrated, and the heating efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a heat preservation cover and an electric pressure cooker. Background Technology

[0002] As an indispensable appliance in modern kitchens, the electric pressure cooker has continuously evolved in design and function to meet users' demands for cooking efficiency and food quality. The keep-warm function of an electric pressure cooker effectively maintains the temperature of the inner pot, ensuring that food stays hot for a long time after cooking.

[0003] In existing technology, electric pressure cookers generally include an outer shell, a heat preservation cover disposed within the outer shell, and an inner pot disposed within the heat preservation cover. A heating plate is disposed between the bottom of the heat preservation cover and the inner pot. The heating plate is in direct contact with the bottom of the inner pot. In order to reduce the force on the heating plate, the heating plate generally has a buffer structure. When the inner pot is placed inside the heat preservation cover and supported by the heating plate, the buffer structure can prevent the inner pot from direct rigid collision.

[0004] Related existing technologies, such as the Chinese patent application "Electric Pressure Cooker," publication number CN2827218Y, disclose an electric pressure cooker for household use. A spring ring and an exhaust button are fitted onto the float valve inside the lid. A positioning steel plate fixed to the inside of the lid is inserted into the bottom of the sealing ring. A top spring is installed between the heating plate and the pot body. An inner pot sensor and a temperature sensor are located in the center of the heating plate. When the food to be cooked is placed in the inner pot and the AC power is turned on, the heating plate protection switch and the temperature limit switch are either activated, the keep-warm switch and the pressure switch are closed, the heating indicator light illuminates, and the heating plate heats up. When the temperature and pressure in the inner pot reach the specified values, the pressure switch and the temperature limit switch are either deactivated, the timer motor starts working, and when the pressure holding time is reached, the timer switch is deactivated, the keep-warm indicator light illuminates, and the heating plate enters the keep-warm state. This type of electric pressure cooker is more energy-efficient and safer.

[0005] Existing heat preservation covers (i.e., the pot body in the aforementioned patent application) are mostly designed with a simple cylindrical structure. With the increasing popularity of energy conservation and environmental protection concepts, the heat preservation covers of electric pressure cookers should also incorporate energy-saving technologies to reduce energy waste and extend the lifespan of the appliance. By improving the materials and structural design of the heat preservation cover, energy consumption can be reduced while ensuring heating performance, achieving higher thermal efficiency. Utility Model Content

[0006] The technical problem to be solved by this application is to provide a heat preservation cover and an electric pressure cooker. By optimizing the structural design of the heat preservation cover, additional support is provided to reduce the burden on the heating plate, and heat can be effectively concentrated to improve heating efficiency.

[0007] The technical solution adopted in this application is as follows: a heat insulation cover, including a cylindrical wall and a cylindrical bottom, wherein the cylindrical bottom is connected to the bottom of the cylindrical wall, and the cylindrical bottom includes a mounting ring and a connecting ring coaxially arranged, the connecting ring being located on the outer periphery of the mounting ring, the inner ring of the connecting ring being connected to the mounting ring, and the outer ring of the connecting ring being connected to the cylindrical wall, wherein the connecting ring is configured with a corrugated structure; the mounting ring is a stepped annular structure, the mounting ring including an outer ring that is mounted to the heating plate and an inner ring that is connected to the temperature limiter, wherein the outer ring is set higher than the inner ring.

[0008] Compared with existing technologies, the advantages of this application are as follows: The bottom of the cylinder is designed with a coaxially arranged mounting ring and connecting ring, functionally dividing the bottom into a mounting area and a connecting area. Furthermore, the mounting area is designed to be centrally located, providing better support for the insulation cover when bearing the weight of the inner pot and the heating plate, reducing deformation or damage caused by gravity. In particular, the connecting ring is designed with a corrugated structure. This corrugated structure not only enhances the connection strength with the cylinder wall but also ensures uniform heat distribution within the insulation cover, preventing localized overheating. The undulations of the corrugations allow for better heat flow within the insulation cover, ensuring more uniform heating of the inner pot. The corrugated structure also creates multiple small isolation spaces, which slow down heat loss to the outside, maintaining a stable internal temperature and improving overall thermal efficiency. In addition, the mounting ring is designed with a stepped circular structure, creating better thermal insulation between the inner and outer rings, reducing the impact of the heating plate on the temperature of the inner pot detected by the temperature limiter, and improving detection accuracy.

[0009] In some embodiments of this application, the heat preservation cover is integrally stamped and made of 430 stainless steel. Compared with traditional iron structures, the heat preservation cover of this application has better toughness and resilience, which can ensure that the pressure of the electric pressure cooker does not change after long-term use.

[0010] In some embodiments of this application, the inner ring has a mounting opening at its center for the partial extension of the temperature limiter, and a retaining element is provided below the inner ring. The inner ring is engaged with the temperature limiter via the retaining element, which is distributed around the outer periphery of the mounting opening.

[0011] An installation port is provided at the center of the inner ring, allowing the temperature limiter to connect directly to the inner ring, simplifying the installation process. Users simply align the temperature limiter with the installation port, insert it, and secure it, reducing installation complexity and time. This design allows for compatibility between different types of temperature limiters and insulation covers, reducing structural limitations imposed by the temperature limiter on the insulation cover and increasing the product's flexibility and adaptability.

[0012] In some embodiments of this application, the outer ring surface is provided with a plurality of mounting holes, and the outer ring is connected to the heating plate through the mounting holes.

[0013] The design with multiple mounting holes makes the connection between the outer ring and the heating plate more secure. The evenly distributed mounting holes can effectively distribute the pressure applied to the connection, reducing the risk of loosening or failure due to excessive local stress.

[0014] In some embodiments of this application, the inner ring and the outer ring are connected by an inclined surface. Using an inclined surface to connect the inner and outer rings provides better support, reduces deformation or damage caused by gravity, and enhances the stability and reliability of the overall structure.

[0015] In some embodiments of this application, the inner ring of the connecting ring is connected to the mounting ring by an arc transition, and the outer ring is set higher than the connecting ring; the outer ring of the connecting ring is connected to the cylinder wall by an arc transition, and the connection between the connecting ring and the cylinder wall forms the first trough.

[0016] The rounded transition design effectively reduces stress concentration at the connection point, minimizing material fatigue and damage caused by excessive local stress, thereby improving the structure's durability and safety. The rounded transition also helps optimize the heat transfer path, ensuring heat is transferred more efficiently from the heating element to the interior of the insulation cover, thus improving overall heating efficiency.

[0017] In some embodiments of this application, the connecting ring is provided with a first peak, a second trough, a second peak and a third trough from the outside to the inside, the second trough is set higher than the first trough and the second trough is set higher than the third trough; the outer ring is set higher than the first peak and the outer ring is set higher than the second peak.

[0018] In this application, the corrugated structure of the connecting ring is a concentric ring structure. By designing crests and troughs, the pressure applied to the connecting ring can be effectively distributed, enhancing the overall structural strength and stability. This corrugated shape provides better support under stress, reducing the risk of deformation. The crest and trough design helps to distribute heat more evenly, ensuring that heat can be effectively transferred to all parts of the insulation cover, improving heating efficiency. The corrugated shape promotes heat flow within the insulation cover, preventing localized overheating.

[0019] In some embodiments of this application, the first peak and the first trough are connected by a first inclined plane, and the first peak and the second trough are connected by a second inclined plane, the first inclined plane being gentler than the second inclined plane; the second peak and the second trough are connected by a third inclined plane, and the second peak and the third trough are connected by a fourth inclined plane, the third inclined plane being parallel to the first inclined plane, the third inclined plane being gentler than the fourth inclined plane.

[0020] The gentle slope design reduces resistance to fluid flow, optimizes the path of airflow and heat flow, promotes internal air circulation, and improves insulation and thermal efficiency.

[0021] An electric pressure cooker includes a temperature limiter, a heating plate, and a heat preservation cover. The heating plate is installed above the bottom surface of the inner side of the heat preservation cover and has a central hole. The top of the temperature limiter passes through the inner ring and the heating plate in sequence.

[0022] Compared with the prior art, the advantage of this application is that the above-mentioned structural design allows the temperature limiter to avoid the influence of the heating plate and directly contact the inner pot of the electric pressure cooker for temperature detection, effectively improving the temperature control accuracy and ensuring that the electric pressure cooker can accurately monitor and control the temperature during the cooking process. The heating plate is installed on the inner bottom surface of the insulation cover, and the inner pot of the electric pressure cooker is mounted above the heating plate and located inside the insulation cover.

[0023] In some embodiments of this application, the temperature limiter includes a mounting plate, an upper cover, a temperature sensor, and a spring. The temperature sensor is mounted on the mounting plate above the spring and is located inside the upper cover. The spring is in a compressed state. The mounting plate has at least three slots. A locking element is provided below the slots of the inner ring. The locking element has an L-shaped structure and is inserted into the slot to engage with the mounting plate.

[0024] In this application, by using the cooperation of the bayonet and the clip, when installing the temperature limiter on the insulation cover, it is only necessary to align the clip with the bayonet, insert the clip into the bayonet, and then rotate the mounting plate in the predetermined direction to realize the installation of the limiter and the insulation cover. The installation is simple and quick.

[0025] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0026] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the structure of the thermal insulation cover in this application;

[0028] Figure 2 This is a cross-sectional view of the thermal insulation cover in this application;

[0029] Figure 3 for Figure 2 A magnified view of the bottom of the middle cylinder;

[0030] Figure 4 A schematic diagram of the structure of the insulation cover in this application with a temperature limiter installed;

[0031] Figure 5 for Figure 4 A sectional view.

[0032] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Cylinder wall; 2. Cylinder bottom; 3. Mounting ring; 31. Outer ring; 32. Inner ring; 4. Connecting ring; 5. Temperature limiter; 6. Mounting port; 7. Clip; 8. Mounting hole; 9. Mounting plate; 10. Upper cover; 11. Temperature sensor; 12. Spring; 13. Bayonet;

[0033] 41. First trough; 42. First peak; 43. Second trough; 44. Second peak; 45. Third trough; 46. First slope; 47. Second slope; 48. Third slope; 49. Fourth slope. Detailed Implementation

[0034] The present application will now be described in detail with reference to the accompanying drawings.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] A heat insulation cover, as described in Embodiment 1 Figures 1 to 2 As shown: The device includes a cylindrical wall 1 and a cylindrical bottom 2. The cylindrical bottom 2 is connected to the bottom of the cylindrical wall 1. The cylindrical bottom 2 includes a coaxially arranged mounting ring 3 and a connecting ring 4. The connecting ring 4 is located on the outer periphery of the mounting ring 3, with its inner ring connected to the mounting ring 3 and its outer ring connected to the cylindrical wall 1. The cylindrical bottom 2 is functionally divided into an installation area and a connection area, with the installation area designed to be centrally located. This provides better support for the insulation cover when bearing the weight of the inner liner and the heating plate, reducing deformation or damage caused by gravity. The connecting ring 4 has a corrugated structure. This corrugated structure not only enhances the connection strength with the cylindrical wall 1 but also ensures that heat is evenly distributed inside the insulation cover, preventing localized overheating. The undulations of the corrugations allow heat to flow better within the insulation cover, ensuring more uniform heating of the inner liner. The corrugated structure also creates multiple small isolation spaces, which slow down heat loss to the outside, maintain a stable internal temperature, and thus improve overall thermal efficiency. The mounting ring 3 has a stepped annular structure, comprising an outer ring 31 mounted to the heating plate and an inner ring 32 connected to the temperature limiter 5. The outer ring 31 is positioned higher than the inner ring 32. The stepped annular structure of the mounting ring 3 in this application provides better thermal insulation between the inner ring 32 and the outer ring 31, reducing the impact of the heating plate on the temperature of the inner pot of the electric pressure cooker detected by the temperature limiter 5, and improving detection accuracy.

[0037] Example 2, as Figures 1 to 3As shown, the heat preservation cover is integrally stamped and made of stainless steel. Preferably, the heat preservation cover is made of 430 stainless steel. Compared with traditional iron structures, the heat preservation cover of this application has better toughness and resilience, which can ensure that the pressure of the electric pressure cooker does not change after long-term use.

[0038] The inner ring 32 has a mounting opening 6 at its center for the partial extension of the temperature limiter 5. A retaining element 7 is located below the inner ring 32, allowing the inner ring 32 to engage with the temperature limiter 5. The retaining elements 7 are distributed around the outer periphery of the mounting opening 6. The mounting opening 6 at the center of the inner ring 32 allows the temperature limiter 5 to be directly connected to the inner ring 32, simplifying the installation process. Users only need to align the temperature limiter 5 with the mounting opening 6, insert it, and secure it, reducing installation complexity and time. This design allows for compatibility between different types of temperature limiters 5 and insulation covers, reducing structural limitations imposed by the temperature limiter 5 on the insulation cover and increasing the product's flexibility and adaptability.

[0039] The outer ring 31 has a plurality of mounting holes 8 evenly distributed on its surface, and the outer ring 31 is connected to the heating plate through the mounting holes 8. The design of multiple mounting holes 8 makes the connection between the outer ring 31 and the heating plate more secure. The evenly distributed mounting holes 8 can effectively disperse the pressure applied to the connection, reducing the loosening or failure of the connection due to excessive local stress.

[0040] The outer ring of the inner ring 32 and the inner ring of the outer ring 31 are connected by an inclined surface. Using an inclined surface to connect the inner ring 32 and the outer ring 31 provides better support between them, reducing deformation or damage caused by gravity and enhancing the stability and reliability of the overall structure.

[0041] The inner ring of the connecting ring 4 is connected to the mounting ring 3 via a circular arc transition, and the outer ring 31 is positioned higher than the connecting ring 4. The outer ring of the connecting ring 4 is connected to the cylinder wall 1 via a circular arc transition, and the connection point between the connecting ring 4 and the cylinder wall 1 forms the first trough 41. This circular arc transition design effectively reduces stress concentration at the connection point, lowering material fatigue and damage caused by excessive local stress, thereby improving the durability and safety of the structure. The circular arc transition design also helps optimize the heat transfer path, ensuring that heat can be transferred more effectively from the heating plate to the interior of the insulation cover, improving overall heating efficiency.

[0042] The connecting ring 4 is provided with a first crest 42, a second trough 43, a second crest 44, and a third trough 45 sequentially from the outside to the inside. The second trough 43 is higher than the first trough 41, and the second trough 43 is higher than the third trough 45. The outer ring 31 is higher than the first crest 42, and the outer ring 31 is higher than the second crest 44. In this application, the corrugated structure of the connecting ring 4 is a concentric ring structure. By setting the structural design of crests and troughs, the pressure applied to the connecting ring 4 can be effectively dispersed, enhancing the strength and stability of the overall structure. This undulating shape can provide better support under stress and reduce the risk of deformation. The crest and trough design helps to distribute heat more evenly, ensuring that heat can be effectively transferred to all parts of the insulation cover, improving heating efficiency. The undulating shape can promote the flow of heat inside the insulation cover and avoid local overheating.

[0043] The first peak 42 and the first trough 41 are connected by a first slope 46, and the first peak 42 and the second trough 43 are connected by a second slope 47. The first slope 46 is gentler than the second slope 47. The second peak 44 and the second trough 43 are connected by a third slope 48, and the second peak 44 and the third trough 45 are connected by a fourth slope 49. The third slope 48 is parallel to the first slope 46 and is gentler than the fourth slope 49. The gentle slope design reduces resistance during fluid flow, optimizes the path of airflow and heat flow, promotes internal air circulation, and improves insulation and thermal efficiency.

[0044] An electric pressure cooker, Example 3, as follows: Figures 4 to 5 As shown, the device includes a temperature limiter 5, a heating plate, and a heat preservation cover as described in Embodiment 1 or Embodiment 2. The heating plate is installed above the bottom surface of the heat preservation cover and has a central hole. The top of the temperature limiter 5 passes through the inner ring 32 and the heating plate in sequence. This structural design allows the temperature limiter 5 to avoid the influence of the heating plate and directly contact the inner pot of the electric pressure cooker for temperature detection, effectively improving temperature control accuracy and ensuring that the electric pressure cooker can accurately monitor and control the temperature during the cooking process. The heating plate is installed on the bottom surface of the heat preservation cover, and the inner pot of the electric pressure cooker is mounted above the heating plate and located inside the heat preservation cover.

[0045] The temperature limiter 5 includes a mounting plate 9, an upper cover 10, a temperature sensor 11, and a spring 12. The temperature sensor 11 is mounted above the mounting plate 9 via the spring 12, and is located inside the upper cover 10. The spring 12 is in a compressed state. The mounting plate 9 has at least three slots 13. A locking element 7 is provided below the inner ring 32 corresponding to the slots 13. The locking element 7 has an L-shaped structure and is inserted into the slots 13 to engage with the mounting plate 9. In this application, through the cooperation of the slots 13 and the locking element 7, when installing the temperature limiter 5 onto the insulation cover, it is only necessary to align the locking element 7 with the slots 13, insert the locking element 7 into the slots 13, and then rotate the mounting plate 9 in a predetermined direction to achieve the installation of the temperature limiter and the insulation cover. The installation is simple and quick.

[0046] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An insulating cover, characterized in that, It includes a cylinder wall (1) and a cylinder bottom (2), the cylinder bottom (2) is connected at the bottom of the cylinder wall (1), the cylinder bottom (2) includes a mounting ring (3) and a connecting ring (4) arranged coaxially, the connecting ring (4) is located at the outer periphery of the mounting ring (3), the inner ring of the connecting ring (4) is connected with the mounting ring (3), the outer ring of the connecting ring (4) is connected with the cylinder wall (1), and the connecting ring (4) is arranged in a corrugated structure; the mounting ring (3) is a stepped annular structure, the mounting ring (3) includes an outer ring (31) mounted with a heating disc and an inner ring (32) connected with a temperature limiter (5), and the outer ring (31) is arranged higher than the inner ring (32).

2. A heat retention cover according to claim 1, characterised in that The heat preservation cover is integrally formed by stamping, and the heat preservation cover is made of 430 stainless steel material.

3. A heat retention cover according to claim 1, wherein The inner ring (32) is provided with a mounting opening (6) in the center for the local extension of the temperature limiter (5), and the lower portion of the inner ring (32) is provided with a clamping piece (7), and the inner ring (32) is clamped with the temperature limiter (5) through the clamping piece (7), and the clamping piece (7) is distributed at the outer periphery of the mounting opening (6).

4. A heat retention cover according to claim 1, wherein The outer ring (31) is uniformly provided with a plurality of mounting holes (8) on the surface, and the outer ring (31) is connected with the heating disc through the mounting hole (8).

5. A heat retention cover according to claim 1, wherein The inner ring (32) is connected with the outer ring (31) through an inclined surface.

6. A heat retention cover according to claim 1, wherein The inner ring of the connecting ring (4) is connected with the mounting ring (3) through a circular arc, the outer ring (31) is arranged higher than the connecting ring (4), the outer ring of the connecting ring (4) is connected with the cylinder wall (1) through a circular arc, and the connecting portion of the connecting ring (4) and the cylinder wall (1) forms a first wave trough (41).

7. A heat retention cover according to claim 6, characterised in that The connecting ring (4) is sequentially provided with a first wave peak (42), a second wave trough (43), a second wave peak (44) and a third wave trough (45) from outside to inside, the second wave trough (43) is arranged higher than the first wave trough (41), and the second wave trough (43) is arranged higher than the third wave trough (45); the outer ring (31) is arranged higher than the first wave peak (42), and the outer ring (31) is arranged higher than the second wave peak (44).

8. A heat retention cover according to claim 7, characterised in that The first wave peak (42) and the first wave trough (41) are connected through a first inclined surface (46), the first wave peak (42) and the second wave trough (43) are connected through a second inclined surface (47), and the first inclined surface (46) is more gentle than the second inclined surface (47); the second wave peak (44) and the second wave trough (43) are connected through a third inclined surface (48), and the second wave peak (44) and the third wave trough (45) are connected through a fourth inclined surface (49), the third inclined surface (48) is parallel to the first inclined surface (46), and the third inclined surface (48) is more gentle than the fourth inclined surface (49).

9. An electric pressure cooker characterized by comprising: It includes a temperature limiter (5), a heating disc and the heat preservation cover according to any one of claims 1-8, the heating disc is mounted above the inner bottom surface of the heat preservation cover, the heating disc is provided with a center hole, and the top of the temperature limiter (5) sequentially passes through the inner ring (32) and the heating disc.

10. The electric pressure cooker according to claim 9, characterized in that, The temperature limiter (5) comprises a mounting plate (9), an upper cover (10), a temperature sensor (11) and a spring (12), the temperature sensor (11) is installed above the mounting plate (9) through the spring (12), the temperature sensor (11) is located in the upper cover (10), and the spring (12) is in a compressed state; at least three clamping holes (13) are formed in the mounting plate (9), a clamping piece (7) is arranged below the inner ring (32) and corresponds to the clamping hole (13), the clamping piece (7) has an L-shaped structure, and the clamping piece (7) is inserted into the clamping hole (13) and is clamped with the mounting plate (9).

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