Pressure cooking utensil

Abstract

The pressure cooking utensil comprises a heat preservation ring, an inner container and an electromagnetic wire coil, the electromagnetic wire coil is located below the heat preservation ring, the inner container is arranged in the heat preservation ring, the inner container is provided with an opening area located above the highest water line, the opening area is provided with a pressure bearing structure, and the pressure bearing structure abuts against the heat preservation ring to form a pressure bearing part. The electromagnetic wire coil is provided with a fixing part extending into the heat preservation ring, the transverse distance between the fixing part and the inner container is smaller than that between the heat preservation ring and the inner container, a cooling air channel is formed between the fixing part and the pressure bearing part, and the pressure cooking utensil further comprises a cooling fan communicated with the cooling air channel. Cold air in the cooling air channel flows in the circumferential direction of the inner container to form rotating air flow, a cooling ring is formed, the contact time of the cold air and the surface of the inner container is greatly prolonged, the cooling effect on the inner container is improved, the cooling air channel corresponds to the middle-upper area of the inner container, air in the middle-upper portion of the inner container can be directly cooled, and therefore the heat transfer path is shortened, and the cooling efficiency is improved.

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] After pressure cooking, pressure cookers need to depressurize to bring the internal pressure down to near atmospheric pressure before opening the lid. Most pressure cookers currently use either venting or natural cooling to depressurize. These methods are slow, resulting in prolonged depressurization time and increased waiting time for users, potentially preventing timely lid opening and impacting the user experience. Furthermore, the venting process generates noise from vigorous gas flow and may cause some liquid to spray out, contaminating the lid.

[0003] To address this, some pressure cookers have a fan installed inside the pot. During the depressurization phase, the fan blows cold air onto the outer surface of the inner pot to quickly lower its temperature, thereby rapidly reducing the internal pressure and allowing the lid to open. Compared to natural depressurization and venting depressurization, this method significantly increases the depressurization speed, effectively shortens the depressurization time, and eliminates airflow noise during the depressurization process.

[0004] However, in existing technologies, the pot body does not have an internal air duct for cold air to contact the outer surface of the inner pot. The cold air entering the pot body can only flow haphazardly along the surface of the inner pot due to its shape. This makes it impossible to cool a specific area of ​​the inner pot in a targeted manner (since the food inside the inner pot is concentrated in the lower middle part, blowing cold air into the upper middle part of the inner pot can shorten the heat transfer path and make the pressure reduction more efficient). Furthermore, the contact time between the cold air and the surface of the inner pot is short, resulting in low heat exchange efficiency and poor cooling effect. Utility Model Content

[0005] This invention provides a pressure cooking appliance to solve the problems that the cold air blown out by the fan cannot effectively cool the inner pot, and that the short contact time between the cold air and the inner pot results in low heat exchange efficiency and poor cooling effect.

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

[0007] A pressure cooking appliance includes a heat-insulating ring, an inner pot, and an electromagnetic coil. The electromagnetic coil is located below the heat-insulating ring, and the inner pot is placed inside the heat-insulating ring. The inner pot has an opening area above the highest water level line, and the opening area has a pressure-bearing structure that abuts against the heat-insulating ring to form a pressure-bearing part. The electromagnetic coil has a fixing part that extends into the heat-insulating ring. The lateral distance between the fixing part and the inner pot is smaller than the lateral distance between the heat-insulating ring and the inner pot. A cooling air duct is formed between the fixing part and the pressure-bearing part. The pressure cooking appliance also includes a cooling fan that communicates with the cooling air duct.

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

[0009] The electromagnetic coil also includes a disc body located below the fixing part. The lateral distance between the disc body and the inner liner is greater than the lateral distance between the fixing part and the inner liner, and a cooling air duct is formed between the disc body and the inner liner.

[0010] An air inlet is provided on the side wall of the insulation ring, and a cooling fan is correspondingly provided at the air inlet. There is a connecting channel between the fixing part and the inner liner that connects the cooling air duct and the cooling air duct; or, the cooling fan includes a first fan and a second fan, the side wall of the insulation ring is provided with a first air inlet, the plate is provided with a second air inlet, the first fan is correspondingly provided at the first air inlet, and the second fan is correspondingly provided at the second air inlet.

[0011] The mouth area is provided with a flange and a neck closing section located below the flange. The insulation ring is provided with an inwardly recessed part. The pressure-bearing structure includes a pressure-bearing step located above the neck closing section. The pressure-bearing step abuts against the inwardly recessed part to form a pressure-bearing part. There is a gripping gap between the flange and the upper edge of the insulation ring.

[0012] The opening area is provided with a flange, and the upper end of the insulation ring is provided with a supporting flange. The flange and the supporting flange abut against each other to form a pressure-bearing part.

[0013] One of the outer side wall of the fixing part and the inner side wall of the insulation ring is provided with a fixing protrusion, and the other is provided with a fixing groove. The electromagnetic coil and the insulation ring can rotate relative to each other so that the fixing protrusion and the fixing groove cooperate to fix them.

[0014] The pressure cooking appliance also includes a locking element, which is located above the fixed part and fixedly connected to the lower edge of the heat preservation ring, so that the locking element and the heat preservation ring clamp the fixed part.

[0015] The locking parts and / or fixing parts are provided with multiple mounting positions at intervals along the circumference of the inner liner, and the mounting positions are provided with limiting parts for limiting the inner liner.

[0016] The inner liner also has a bladder located below the mouth area, and the outer surface of the bladder is provided with a flow-guiding spherical surface.

[0017] The electromagnetic coil also includes a coil body located below the fixing part. The coil body has an arc-shaped coil frame and a vertical wall extending upward from the arc-shaped coil frame. The arc-shaped coil frame is provided with a first winding area, and the vertical wall is provided with a second winding area.

[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, a pressure-bearing structure is provided at the opening area of ​​the inner liner. The pressure-bearing structure abuts against the insulation ring to form a pressure-bearing part. When the internal air pressure of the inner liner increases, the inner liner tends to move downward under the action of air pressure. The insulation ring supports the pressure-bearing structure to bear the downward pressure of the inner liner. At the same time, an electromagnetic coil is provided below the insulation ring to heat the inner liner by electromagnetic heating, realizing non-contact heating. This improves heating efficiency and allows a gap to be formed between the inner liner and the electromagnetic coil, thus facilitating the cooling of the inner liner surface by cold air.

[0020] Meanwhile, the electromagnetic coil has a fixing part that extends into the insulation ring. The lateral distance between the fixing part and the outer surface of the inner liner is smaller than the lateral distance between the insulation ring and the outer surface of the inner liner. This creates a cooling air duct surrounding the outer circumference of the inner liner between the pressure-bearing part and the fixing part. The cooling fan is connected to the cooling air duct. Because the pressure-bearing structure at the top of the cooling air duct abuts against the insulation ring, airflow is difficult to pass through. The reduced distance between the bottom fixing part and the inner liner also slows down the airflow velocity, allowing the cold air to stay in the cooling air duct for a longer time. This causes the cold air in the cooling air duct to flow circumferentially along the inner liner, forming a rotating airflow and creating a cooling ring. This greatly increases the contact time between the cold air and the surface of the inner liner, improving the cooling effect. Furthermore, the larger lateral distance between the insulation ring and the surface of the inner liner results in a thicker cooling ring, further enhancing the cooling effect. In addition, the cooling air duct is located above the highest water level line of the inner liner, corresponding to the upper-middle area of ​​the inner liner. This allows for direct cooling of the air in the upper-middle part of the inner liner, thereby shortening the heat transfer path and improving cooling efficiency.

[0021] 2. In a preferred embodiment of this utility model, the electromagnetic coil also includes a disc body located below the fixing part. The lateral distance between the disc body and the inner liner is greater than the lateral distance between the fixing part and the inner liner, forming a cooling air duct between the disc body and the inner liner. Due to the use of electromagnetic heating, the disc body and the inner liner can achieve non-contact heating, thus creating a gap between them to form a cooling air duct. The fixing part is located at the top of the cooling air duct and has a small lateral distance from the surface of the inner liner, which also restricts the airflow out of the cooling air duct, allowing the airflow to remain within the cooling air duct for a longer period. Simultaneously, the cooling air duct corresponds to the lower middle part of the side wall and the bottom wall of the inner liner, which are areas where food is concentrated. Air cooling of these areas allows the high-temperature gas inside the inner liner to liquefy upon contact with the cold air, forming a moist film on the inner wall of the inner liner, preventing direct contact between the food and the inner wall of the inner liner, thus achieving a non-stick effect.

[0022] 3. In a preferred embodiment of this utility model, the opening area is provided with a flange and a neck constriction section located below the flange. The insulation ring is provided with an inwardly recessed portion. The pressure-bearing structure includes a pressure-bearing step located above the neck constriction section. The pressure-bearing step abuts against the inwardly recessed portion to form the pressure-bearing portion. A gripping gap exists between the flange and the upper edge of the insulation ring. The flange facilitates the user's gripping and placement of the inner liner. The neck constriction section is located below the flange, and the pressure-bearing step is located above the neck constriction section, abutting against the inwardly recessed portion of the insulation ring to achieve pressure transmission at the neck of the inner liner. After the two abut against each other, a gripping gap exists between the flange and the upper edge of the insulation ring, facilitating the user to insert their fingers into the gripping gap to grasp the flange, thereby facilitating the placement and removal of the inner liner. Meanwhile, the neck tapering section is located below the pressure-bearing step, that is, inside the cooling air duct. As the neck tapering section contracts toward the inside of the inner liner, the thickness of the cooling air duct is further increased, which in turn further increases the thickness of the cooling ring formed by the cold air in the cooling channel, thereby improving the cooling efficiency of the inner liner.

[0023] 4. In a preferred embodiment of this utility model, one of the outer wall of the fixing part and the inner wall of the insulation ring is provided with a fixing protrusion, and the other is provided with a fixing groove. The electromagnetic coil and the insulation ring can rotate relative to each other so that the fixing protrusion and the fixing groove cooperate to fix them. The fixing part is located inside the insulation ring, so that the inner wall of the insulation ring and the outer wall of the fixing part have an overlapping area, which facilitates the setting of the fixing structure in this area, and the fixing area is large, which can ensure the stability and convenience of fixing. The fixing of the electromagnetic coil and the insulation ring is achieved by the rotational cooperation of the fixing protrusion and the fixing groove. On the one hand, it reduces the fixing difficulty, makes the fixing operation simpler and more convenient, and improves the assembly efficiency. On the other hand, it can improve the positioning effect of the electromagnetic coil and the insulation ring. After they are screwed together, they can be accurately positioned, which can limit the relative movement between them, thus facilitating the subsequent fastening operation.

[0024] 5. In a preferred embodiment of this utility model, the electromagnetic coil further includes a coil body located below the fixing part. The coil body has an arc-shaped coil frame and a vertical wall extending upward from the arc-shaped coil frame. The arc-shaped coil frame is provided with a first winding area, and the vertical wall is provided with a second winding area. The first winding area corresponds to the bottom wall of the inner pot, and the second winding area corresponds to the side wall of the inner pot. During cooking, the coil in the first winding area is energized to heat the bottom of the inner pot, and the coil in the second winding area is energized to heat the side of the inner pot. Thus, the bottom heating and the side heating work together to form multi-directional, three-dimensional heating of the inner pot, greatly improving the heating effect and heating uniformity. Attached Figure Description

[0025] 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:

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

[0027] Figure 2 This is a cross-sectional view of a portion of the structure of a pressure cooking appliance according to one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the heat-insulating ring and the electromagnetic coil according to one embodiment of the present invention;

[0029] Figure 4 for Figure 3 Exploded view of the structure of the central insulation ring and electromagnetic coil;

[0030] Figure 5 for Figure 3 A schematic diagram of the structure of the central insulation ring and the electromagnetic coil from another perspective;

[0031] Figure 6 This is a schematic diagram of the inner liner according to one embodiment of the present invention;

[0032] Figure 7 This is an exploded view of a portion of the structure of a pressure cooking appliance according to one embodiment of the present invention.

[0033] in:

[0034] 1. Insulation ring; 11. Cooling air duct; 12. Inward section; 13. Air inlet; 14. Air outlet; 15. Clearance notch; 16. Fixing protrusion;

[0035] 2. Electromagnetic coil; 21. Fixing part; 211. Connecting channel; 22. Coil body; 221. Arc-shaped coil frame; 222. Vertical wall; 23. Cooling air duct; 24. First winding area; 25. Second winding area; 26. Fixing groove; 261. Horizontal opening;

[0036] 3 Inner liner; 31 Mouth area; 32 Pressure bearing section; 33 Flanged edge; 331 Grip gap; 34 Neck closing section; 35 Pressure bearing step; 36 Flow guide spherical surface;

[0037] 4 cooling fans;

[0038] 5. Locking components; 51. Fixing buckle; 52. Fixing post;

[0039] 6. Limiting components. Detailed Implementation

[0040] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] like Figures 1 to 4As shown, a pressure cooking appliance includes a heat preservation ring 1, an inner pot 3, and an electromagnetic coil 2. The electromagnetic coil 2 is located below the heat preservation ring 1, and the inner pot 3 is placed inside the heat preservation ring 1. The inner pot 3 has an opening region 31 located above the highest water level line. The opening region 31 has a pressure-bearing structure, which abuts against the heat preservation ring 1 to form a pressure-bearing part 32. The electromagnetic coil 2 has a fixing part 21 that extends into the interior of the heat preservation ring 1. The lateral distance between the fixing part 21 and the inner pot 3 is smaller than the lateral distance between the heat preservation ring 1 and the inner pot 3. A cooling air duct 11 is formed between the fixing part 21 and the pressure-bearing part 32. The pressure cooking appliance also includes a cooling fan 4 that communicates with the cooling air duct 11.

[0046] like Figure 2 As shown, the heat-insulating ring 1 surrounds the outer periphery of the side wall of the inner liner 3, the electromagnetic coil 2 is located below the heat-insulating ring 1, and the electromagnetic coil 2 and the heat-insulating ring 1 together form a receiving cavity, in which the inner liner 3 is located.

[0047] In this invention, the opening area 31 of the inner liner 3 is provided with a pressure-bearing structure. The pressure-bearing structure abuts against the insulation ring 1 to form a pressure-bearing part 32. When the internal air pressure of the inner liner 3 increases, the inner liner 3 tends to move downward under the action of air pressure. The insulation ring 1 supports the pressure-bearing structure to bear the downward pressure of the inner liner 3. At the same time, an electromagnetic coil 2 is provided below the insulation ring 1 to heat the inner liner 3 by electromagnetic heating, realizing non-contact heating. On the one hand, it improves heating efficiency, and on the other hand, it allows a gap to be formed between the inner liner 3 and the electromagnetic coil 2, so that cold air can come into contact with the surface of the inner liner 3 for cooling.

[0048] Meanwhile, the electromagnetic coil 2 has a fixing part 21 that extends into the insulation ring 1. The lateral distance between the fixing part 21 and the outer surface of the inner liner 3 is smaller than the lateral distance between the insulation ring 1 and the outer surface of the inner liner 3, so that a cooling air duct 11 is formed around the outer periphery of the inner liner 3 between the pressure-bearing part 32 and the fixing part 21. The cooling fan 4 is connected to the cooling air duct 11. Since the pressure-bearing structure at the top of the cooling air duct 11 abuts against the insulation ring 1, airflow is difficult to pass through. The small distance between the bottom fixing part 21 and the inner liner 3 also slows down the airflow velocity in the cooling air duct 11, thus allowing the cold air to stay in the cooling air duct 11 for a longer time. The cold air in the cooling air duct 11 flows around the inner liner 3 to form a rotating airflow, forming a cooling ring, which greatly increases the contact time between the cold air and the surface of the inner liner 3, improving the cooling effect on the inner liner 3. In addition, the large lateral distance between the insulation ring 1 and the surface of the inner liner 3 makes the cooling ring thicker, further improving the cooling effect. In addition, the cooling air duct 11 is located above the highest water level line of the inner tank 3, corresponding to the upper middle part of the inner tank 3. It can directly cool the air in the upper middle part of the inner tank 3, thereby shortening the heat transfer path and improving the cooling efficiency.

[0049] It should be noted that the fixing part 21 can contact the inner liner 3 to center the inner liner 3, or the two can not contact each other to form a connecting channel 211 with a small flow area between them.

[0050] Preferably, the side wall of the insulation ring 1 is provided with an air inlet 13 that communicates with the cooling fan 4, and the lateral distance between the air inlet 13 and the surface of the inner liner 3 is not less than 5mm. This increases the air volume entering the cooling air duct 11, resulting in better cooling. The side wall of the insulation ring 1 is also provided with an air outlet 14, which makes the air duct circulate faster and improves the cooling effect.

[0051] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 As shown, the electromagnetic coil 2 also includes a coil body 22 located below the fixing part 21. The lateral distance between the coil body 22 and the inner liner 3 is greater than the lateral distance between the fixing part 21 and the inner liner 3, and a cooling air duct 23 is formed between the coil body 22 and the inner liner 3.

[0052] Because electromagnetic heating is used, the plate 22 and the inner liner 3 can be heated without contact, thus creating a gap between them and forming a cooling air duct 23. Figure 2 As shown, the cooling air duct 23 is located not only between the side wall of the inner liner 3 and the plate 22, but also between the bottom wall of the inner liner 3 and the plate 22. This allows the cold air in the cooling air duct 23 to not only flow circumferentially along the side wall of the inner liner 3 to form a cooling ring, but also to flow through the bottom wall of the inner liner 3 to cool the bottom of the inner liner 3.

[0053] The fixing part 21 is located at the top of the cooling air duct 23 and has a small lateral distance from the surface of the inner liner 3. This also restricts the airflow out of the cooling air duct 23, allowing the airflow to stay in the cooling air duct 23 for a longer time. At the same time, the cooling air duct 23 corresponds to the lower middle part of the side wall and the bottom wall of the inner liner 3, which are areas where food is concentrated. Air cooling of these areas allows the high-temperature gas inside the inner liner 3 to liquefy upon contact with the cold air and form a moist film on the inner wall of the inner liner 3, preventing food from directly contacting the inner wall of the inner liner 3, thus achieving a non-stick effect.

[0054] By incorporating two cooling rings on the upper and lower parts of the inner pot 3's sidewall, concentrated cooling is achieved at both the top and bottom of the inner pot 3, increasing the contact time between the cold air and the inner pot 3 and improving the cooling effect. On one hand, this allows the temperature inside the inner pot 3 to drop rapidly, enabling faster pressure reduction and further improving pressure reduction efficiency. On the other hand, in addition to rapid pressure reduction, the cold air in the lower cooling duct 23 concentrates on cooling the lower part of the inner pot 3, forming a moist film on the inner wall of the lower part of the inner pot 3, achieving a non-stick effect. This integration of air-cooled pressure reduction and a moist film non-stick function allows the inner pot 3 to have an uncoated structure, realizing the multi-functionality of the pressure cooking appliance and improving the user experience.

[0055] It should be noted that this utility model does not limit the connection method between the cooling fan 4 and the cooling duct 11, which can be one of the following embodiments:

[0056] Example 1: In this example, as Figure 2 , Figure 3 As shown, the side wall of the insulation ring 1 has an air inlet 13, and the cooling fan 4 is correspondingly arranged at the air inlet 13. The fixing part 21 and the inner liner 3 have a connecting channel 211 that connects the cooling air duct 11 and the cooling air duct 23.

[0057] In this embodiment, the cooling fan 4 is provided corresponding to the cooling air duct 11, and the side wall of the insulation ring 1 has an air inlet 13 that communicates with the cooling fan 4, so that cold air can directly enter the cooling air duct 11, converge in the cooling air duct 11 and flow along the circumference of the inner liner 3 to form a ring-shaped airflow, which cools the upper and middle parts of the inner liner 3. As more and more cold air enters the cooling air duct 11, the cold air in the cooling air duct 11 flows downward through the connecting channel 211 between the fixing part 21 and the outer surface of the inner liner 3 to the cooling air duct 23, and continues to flow in the cooling air duct 23 to cool the lower and middle parts of the inner liner 3.

[0058] Example 2: In this example, the cooling fan 4 includes a first fan and a second fan. The side wall of the insulation ring 1 is provided with a first air inlet 13, and the plate 22 is provided with a second air inlet 13. The first fan is correspondingly set at the first air inlet 13, and the second fan is correspondingly set at the second air inlet 13.

[0059] In this embodiment, there are two cooling fans 4. The first fan is positioned corresponding to the cooling air duct 11 and is directly connected to the cooling air duct 11 through the first air inlet 13 on the side wall of the insulation ring 1, blowing cold air into the cooling air duct 11. The second fan is positioned corresponding to the cooling air duct 23 and is directly connected to the cooling air duct 23 through the second air inlet 13 on the plate 22, blowing cold air into the cooling air duct 23. This allows the cold air in the two air ducts to flow relatively independently and ensures a large temperature difference between the cold air in the two air ducts and the inner liner 3, thus ensuring cooling efficiency. At the same time, the start time of the two fans can be independently controlled to achieve zoned cooling control.

[0060] In this embodiment, the fixing part 21 can be in contact with the surface of the inner liner 3 to separate the cooling air duct 11 and the cooling air duct 23, preventing the airflow in the two ducts from mixing. Alternatively, a gap can be formed between the fixing part 21 and the surface of the inner liner 3 to create a connecting channel 211, allowing the airflow in the two ducts to mix and be discharged together.

[0061] It should be noted that the present invention does not limit the location of the pressure-bearing structure of the inner liner 3, and it can be one of the following embodiments:

[0062] Implementation Method 1: In this implementation method, as follows Figure 2 As shown, the mouth area 31 is provided with a flange 33 and a neck closing section 34 located below the flange 33. The heat insulation ring 1 is provided with an inwardly recessed part 12. The pressure-bearing structure includes a pressure-bearing step 35 located above the neck closing section 34. The pressure-bearing step 35 abuts against the inwardly recessed part 12 to form a pressure-bearing part 32. There is a gripping gap 331 between the flange 33 and the upper edge of the heat insulation ring 1.

[0063] The flange 33 facilitates user gripping and placement of the inner liner 3. The neck tapering section 34 is located below the flange 33, and the pressure-bearing step 35 is located above the neck tapering section 34, engaging with the inward-retracting portion 12 of the insulation ring 1 to achieve pressure transmission at the neck of the inner liner 3. The neck tapering section 34 naturally forms the pressure-bearing step 35 above, thus utilizing the structural characteristics of the inner liner 3 to create the pressure-bearing step 35 without the need for additional pressure-bearing structure processing, reducing the processing difficulty of the inner liner 3. Furthermore, after the pressure-bearing step 35 engages with the inward-retracting portion 12, a gripping gap 331 exists between the flange 33 and the upper edge of the insulation ring 1, facilitating the user to insert their fingers into the gripping gap 331 to grasp the flange 33, thereby facilitating the placement and removal of the inner liner 3.

[0064] Meanwhile, the neck tapering section 34 is located below the pressure-bearing step 35, that is, inside the cooling air duct 11. As the neck tapering section 34 contracts toward the inside of the inner liner 3, the thickness of the cooling air duct 11 is further increased, which in turn further increases the thickness of the cooling ring formed by the cold air in the cooling channel, thereby improving the cooling efficiency of the inner liner 3.

[0065] like Figure 2 As shown, the inner recess 12 and the supporting step both extend downwards at an angle toward the center of the inner liner 3, so that after the inner liner 3 is placed, the weight of the inner liner 3 will cause it to slide toward the center of the insulation ring 1, ensuring that the inner liner 3 and the insulation ring 1 remain centered.

[0066] Implementation Method 2: In this embodiment, the opening area 31 is provided with a flange 33, and the upper end of the heat insulation ring 1 is provided with a supporting flange. The flange 33 and the supporting flange abut against each other to form a pressure-bearing part 32.

[0067] The inner liner 3's flange 33 at the opening edge abuts against the support flange of the insulation ring 1 to achieve pressure resistance, which can adapt to inner liners 3 of different shapes (such as spherical liner and straight liner). It also eliminates the need to process the neck closing section 34 in the opening area 31 of the inner liner 3, reducing the processing difficulty of the inner liner 3 and improving the adaptability of the inner liner 3.

[0068] This utility model does not limit the fixing method of the heat preservation ring 1 and the electromagnetic coil 2. As a preferred embodiment of this utility model, such as Figure 3 , Figure 4 , Figure 7 As shown, a fixing protrusion 16 is provided on one of the outer side wall of the fixing part 21 and the inner side wall of the heat preservation ring 1, and a fixing groove 26 is provided on the other side. The electromagnetic coil 2 and the heat preservation ring 1 can rotate relative to each other so that the fixing protrusion 16 and the fixing groove 26 cooperate to fix them.

[0069] The fixing part 21 is located inside the insulation ring 1, so that the inner wall of the insulation ring 1 and the outer wall of the fixing part 21 overlap. This facilitates the installation of a fixing structure in this area, and the large fixing area ensures fixing stability and convenience, high fixing strength, increased product quality, and reduced risk of damage during transportation. The electromagnetic coil 2 and the insulation ring 1 are fixed by the rotational engagement of the fixing protrusion 16 and the fixing groove 26. This reduces the difficulty of fixing, making the fixing operation simpler and more convenient, and improving assembly efficiency. On the other hand, it improves the positioning effect of the electromagnetic coil 2 and the insulation ring 1. After they are screwed together, they can be accurately positioned, which can limit the relative movement between them, thus facilitating subsequent fastening operations.

[0070] Specifically, such as Figure 3 , Figure 4 , Figure 7As shown, the lower end of the insulation ring 1 is provided with an avoidance notch 15. The edge of the avoidance notch 15 is folded inward to form a fixing protrusion 16. The outer wall of the fixing part 21 is provided with a horizontally extending fixing groove 26. The fixing groove 26 has a horizontal opening 261. During assembly, the insulation ring 1 and the electromagnetic coil 2 are moved up and down relative to each other so that the fixing protrusion 16 is located at the horizontal opening 261 of the fixing groove 26. Then, the electromagnetic coil 2 and the insulation ring 1 are rotated relative to each other so that the fixing protrusion 16 moves into the fixing groove 26 to complete the fixing.

[0071] Furthermore, such as Figure 4 , Figure 5 , Figure 7 As shown, the pressure cooking appliance also includes a locking member 5, which is disposed above the fixing part 21 and fixedly connected to the lower edge of the heat preservation ring 1, so that the locking member 5 and the heat preservation ring 1 clamp the fixing part 21.

[0072] like Figure 4 As shown, the locking member 5 is a ring structure, placed inside the insulation ring 1, and pressed down on the top of the fixing part 21 from top to bottom. Then, the locking member 5 is fixed to the lower edge of the insulation ring 1, so that the locking member 5 and the insulation ring 1 clamp the fixing part 21, and the insulation ring 1 and the electromagnetic coil 2 are tightly connected.

[0073] Specifically, such as Figure 4 As shown, the locking component 5 is provided with a downwardly extending fixing buckle 51, which is engaged and fixed with the lower edge of the insulation ring 1. In addition, the locking component 5 is also provided with a fixing post 52, which is fastened to the electromagnetic coil 2 by screws or other fasteners to further improve the connection stability.

[0074] like Figure 4 As shown, the locking component 5 consists of two arc-shaped structures that together form a complete ring structure, which, after assembly, restricts the rotation of the electromagnetic coil 2.

[0075] Preferably, such as Figure 5 As shown, the locking member 5 and / or the fixing part 21 are provided with a plurality of mounting positions at intervals along the circumference of the inner liner 3, and a limiting member 6 for limiting the inner liner 3 is provided in the mounting position.

[0076] Multiple circumferentially arranged limiting components 6 serve to position the inner liner 3, ensuring that the inner liner 3 remains centered with the insulation ring 1 and the electromagnetic coil 2. This guarantees uniform distance between all areas of the inner liner 3 and the electromagnetic coil 2, ensuring uniform heating of the inner liner 3. Furthermore, it ensures uniform circumferential contact between the rim of the inner liner 3 and the sealing ring of the lid, preventing sealing problems caused by misalignment of the inner liner 3.

[0077] Specifically, the limiting component 6 is made of elastic materials such as silicone or rubber to make its contact with the inner liner 3 gentler and prevent the inner liner 3 from being scratched.

[0078] In a preferred embodiment, such as Figure 6 As shown, the inner liner 3 also has a bladder body located below the mouth region 31, and the outer surface of the bladder body is provided with a flow guide spherical surface 36.

[0079] The outer surface of the inner liner 3 is spherical. When cold air enters the cooling duct 11, it not only flows circumferentially along the inner liner 3 to form a cooling ring, but is also guided by the spherical surface to flow downwards along the surface of the inner liner 3, cooling the lower and middle parts of the inner liner 3. This creates a spiral airflow, further improving the contact effect between the cold air and the inner liner 3, and making the cooling uniformity of the upper and lower parts and the circumference of the inner liner 3 better.

[0080] As a preferred embodiment, such as Figure 2 , Figure 3 As shown, the electromagnetic coil 2 also includes a coil body 22 located below the fixing part 21. The coil body 22 has an arc-shaped coil frame 221 and a vertical wall 222 extending upward from the arc-shaped coil frame 221. The arc-shaped coil frame 221 is provided with a first winding area 24, and the vertical wall 222 is provided with a second winding area 25.

[0081] The first winding area 24 corresponds to the bottom wall of the inner pot 3, and the second winding area 25 corresponds to the side wall of the inner pot 3. During the cooking process, the coil in the first winding area 24 is energized to heat the bottom of the inner pot 3, and the coil in the second winding area 25 is energized to heat the side of the inner pot 3. Thus, the bottom heating and the side heating work together to form a multi-directional three-dimensional heating of the inner pot 3, which greatly improves the heating effect and heating uniformity.

[0082] At the same time, by installing a fan in the vertical section to blow cold air into the inner liner 3, the temperature difference between the cold air and the inner liner 3 can be increased, which will help to form a moist film in the middle and lower part of the inner liner 3 and improve the non-stick effect.

[0083] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0084] 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.

[0085] 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 ring, an inner pot, and an electromagnetic coil, wherein the electromagnetic coil is located below the heat-insulating ring, and the inner pot is placed inside the heat-insulating ring, characterized in that, The inner pot has an opening area located above the highest water level line. The opening area has a pressure-bearing structure. The pressure-bearing structure abuts against the heat-insulating ring to form a pressure-bearing part. The electromagnetic coil has a fixing part that extends into the heat-insulating ring. The lateral distance between the fixing part and the inner pot is smaller than the lateral distance between the heat-insulating ring and the inner pot. A cooling air duct is formed between the fixing part and the pressure-bearing part. The pressure cooking appliance also includes a cooling fan that communicates with the cooling air duct.

2. The pressure cooking appliance according to claim 1, characterized in that, The electromagnetic coil also includes a disc body located below the fixing part. The lateral distance between the disc body and the inner liner is greater than the lateral distance between the fixing part and the inner liner, and a cooling air duct is formed between the disc body and the inner liner.

3. The pressure cooking appliance according to claim 2, characterized in that, The side wall of the insulation ring has an air inlet, and the cooling fan is correspondingly positioned at the air inlet. The fixing part and the inner liner have a connecting channel that connects the cooling air duct and the heat dissipation air duct; or... The cooling fan includes a first fan and a second fan. The side wall of the insulation ring has a first air inlet, and the plate has a second air inlet. The first fan is correspondingly located at the first air inlet, and the second fan is correspondingly located at the second air inlet.

4. The pressure cooking appliance according to claim 1, characterized in that, The opening area is provided with a flange and a neck closing section located below the flange. The heat insulation ring is provided with an inwardly recessed portion. The pressure-bearing structure includes a pressure-bearing step located above the neck closing section. The pressure-bearing step abuts against the inwardly recessed portion to form the pressure-bearing portion. There is a gripping gap between the flange and the upper edge of the heat insulation ring.

5. The pressure cooking appliance according to claim 1, characterized in that, The opening area is provided with a flange, and the upper end of the insulation ring is provided with a supporting flange. The flange and the supporting flange abut against each other to form the pressure-bearing part.

6. The pressure cooking appliance according to claim 1, characterized in that, One of the outer sidewall of the fixing part and the inner sidewall of the heat preservation ring is provided with a fixing protrusion, and the other is provided with a fixing groove. The electromagnetic coil and the heat preservation ring can rotate relative to each other so that the fixing protrusion and the fixing groove cooperate to fix them.

7. The pressure cooking appliance according to claim 6, characterized in that, The pressure cooking appliance also includes a locking member, which is disposed above the fixed part and fixedly connected to the lower edge of the heat preservation ring, so that the locking member and the heat preservation ring clamp the fixed part.

8. The pressure cooking appliance according to claim 7, characterized in that, The locking member and / or the fixing part are provided with a plurality of mounting positions at intervals along the circumference of the inner liner, and a limiting member for limiting the inner liner is provided in the mounting position.

9. The pressure cooking appliance according to claim 1, characterized in that, The inner liner also has a bladder body located below the opening region, and the outer surface of the bladder body is provided with a flow-guiding spherical surface.

10. The pressure cooking appliance according to claim 1, characterized in that, The electromagnetic coil also includes a coil body located below the fixing part. The coil body has an arc-shaped coil frame and a vertical wall extending upward from the arc-shaped coil frame. The arc-shaped coil frame is provided with a first winding area, and the vertical wall is provided with a second winding area.

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