A pressure cooking appliance

Abstract

The utility model discloses a pressure cooking utensil, including the pot cover and the pot body, the pot cover includes the pressure -bearing inner lid and the detachable lid fixed below the pressure -bearing inner lid, the pressure -bearing inner lid is provided with the exhaust pipe, and the lower extreme of exhaust pipe is equipped with the fixed portion who cooperates and fixes with the detachable lid, the detachable lid has the first area and the second area of sunken setting, and the first area is lower than the second area, and the first area corresponds the central area of pressure -bearing inner lid, and the second area is located the outside of first area, and the first area is seted up with the first gas hole, and the second area is seted up with the second gas hole, and the exhaust pipe has the air inlet hole between the detachable lid and the pressure -bearing inner lid, and the pressure -bearing inner lid still is equipped with the float valve, and the float valve is set up with the second area upper and lower correspondence. The float valve is set up with the second area upper and lower correspondence, so that the airflow in the cooking cavity can directly act on the float valve after passing through the second gas hole, thereby shorten the path of airflow reaching the float valve, and the reaction of the float valve is more rapid, and the cooking 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] Pressure cookers typically have a lid consisting of a top cover and an inner cover located below the top cover. When the lid is closed, the inner cover fits into the pot to form a cooking chamber. The inner cover is usually made of metal to withstand the high-pressure environment inside the cooking chamber.

[0003] However, since the inner lid is in direct contact with the environment inside the cooking cavity, during the cooking process, food and liquids inside the cooking cavity will rise or splash onto the inner lid, causing it to become contaminated. Since the inner lid is mostly a non-removable structure, users cannot clean the inner lid separately and can only clean the entire lid, which is quite inconvenient.

[0004] Therefore, some pressure cookers have an additional removable cover below the inner lid, positioned between the inner lid and the food inside the cooking cavity. This reduces contamination of the inner lid by food and liquids. The removable cover is also detachable, allowing users to clean it separately. For example, Chinese patent CN207492565U discloses an electric pressure cooker with a removable inner lid mounted below the outer lid. The outer lid has an anti-opening rod and a temperature measuring device housed within the space between the outer and inner lids. This allows the anti-opening rod and temperature measuring device to be concealed within the inner lid, resulting in a cleaner lid appearance and easier cleaning.

[0005] However, the above solution has many drawbacks. On the one hand, the stop rod (float valve) and the temperature measuring device are located between the inner cover and the outer cover, which prevents them from directly contacting the environment inside the cooking cavity. The air inside the cooking cavity can only enter between the inner cover and the outer cover through the holes on the inner cover and then act on the temperature measuring device, or be discharged through the stop rod. This results in a lag in the response of the stop rod and the temperature measuring device. The stop rod cannot float up in time, which makes the pressure in the cooking cavity rise later and the detection of the temperature measuring device is also relatively slow.

[0006] On the other hand, when the liquid in the cooking cavity boils, the viscous liquid or foam in the pot will rise through the holes on the inner lid to the space between the inner and outer lids, and then come into direct contact with the stop rod and the temperature measuring device, causing malfunctions. For example, the viscous liquid will cause the stop rod to stick together and not float or fall normally, making it impossible for the pressure cooker to pressurize or depressurize normally. Utility Model Content

[0007] This invention provides a pressure cooking appliance to solve the problems of inconvenient cleaning of the pot lid and slow response of the float valve, which is prone to sticking to the soup liquid and thus limiting its function.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A pressure cooking appliance includes a lid and a pot body. The lid includes a pressure-bearing inner lid and a removable lid detachably fixed below the pressure-bearing inner lid. The pressure-bearing inner lid and the pot body cooperate to form a cooking cavity. The pressure-bearing inner lid is provided with an exhaust pipe. The lower end of the exhaust pipe is provided with a fixing part that cooperates with and is fixed to the removable lid. The removable lid has a first region and a second region that are recessed. The first region is lower than the second region. The first region corresponds to the center region of the pressure-bearing inner lid. The second region is located outside the first region. The first region has a first vent hole, and the second region has a second vent hole. The exhaust pipe has an air inlet hole located between the removable lid and the pressure-bearing inner lid. The pressure-bearing inner lid is also provided with a float valve, which is vertically aligned with the second region.

[0010] In this invention, the pressure-bearing inner cover and the pot body cooperate to form a cooking cavity. The removable cover is located inside the cooking cavity, between the pressure-bearing inner cover and the food inside the pot body. When food and liquid rise from the cooking cavity, they will first come into contact with the removable cover and be blocked by it, thus reducing the probability of the pressure-bearing inner cover being directly contaminated. The removable cover can be separated from the fixed part of the pressure-bearing inner cover, allowing it to be removed and making it convenient for the user to clean it separately.

[0011] The removable lid has a first area and a second area. The first area has a first vent hole, and the second area has a second vent hole. During the venting and depressurization process, the gas in the cooking chamber can pass through the first and second vent holes to reach the space between the removable lid and the pressure-bearing inner lid, and then be discharged through the exhaust pipe. The float valve is positioned vertically opposite the second area, allowing the airflow in the cooking chamber to directly act on the float valve after passing through the second vent hole. This shortens the path of the airflow to the float valve, enabling it to reach the float valve more quickly. This results in a faster response from the float valve, allowing it to be promptly lifted and sealed by the airflow. The pot can then enter the pressure cooking stage more quickly, improving cooking efficiency.

[0012] Furthermore, the first area is positioned lower than the second area, bringing it closer to the food inside the cooking cavity, while the second area is farther away. The first area is located in the center of the pressure-bearing inner cover. During cooking, the heat from the heating device tends to concentrate in the center of the cooking cavity, resulting in better heating at the center than at the edges. Therefore, when the liquid boils, the boiling is more intense at the center. Consequently, the boiling liquid and foam first contact the first area in the center. The first vent in the first area acts as a barrier and breaks bubbles, weakening the upward momentum of the liquid and accelerating bubble bursting. This allows gas to smoothly enter above the removable cover, while the liquid is blocked below. The second area is farther from the food, making it harder for liquid and foam to reach it. Therefore, by increasing the distance between the second area (where the float valve is located) and the food, and by using the first area to block and break bubbles in the boiling liquid, the risk of liquid entering the float valve through the second vent is greatly reduced, ensuring the cleanliness of the float valve and thus its operational reliability.

[0013] The removable cover has a concave arc surface, with both the first region and the second region located on the concave arc surface. The first region is located in the central area of ​​the concave arc surface, and the second region surrounds the outer periphery of the first region.

[0014] In this design, the removable cover has a concave structure, forming a concave arc surface on its surface. This makes the removable cover gradually decrease in height from the edge to the center. The central area of ​​the concave arc surface corresponds to the central area of ​​the pressure-bearing cover. The second area is located on the outer ring of the first area, so that the float valve is located on the edge area of ​​the pressure-bearing inner cover, offset from the center of the pressure-bearing inner cover, which is also the center of the cooking cavity. This further reduces the probability of liquid and foam surging up and contacting the float valve due to violent boiling at the center of the cooking cavity. At the same time, the overall concave structure of the removable cover also reduces the manufacturing difficulty and improves the aesthetics of the removable cover.

[0015] At least one protrusion is provided between the first region and the second region, which protrudes toward the pressure-bearing inner cover relative to the first region and the second region.

[0016] In this solution, the removable cover has a concave structure, which results in low structural strength. By setting a raised part that protrudes upward relative to the first and second regions, the structural strength of the removable cover can be improved, making it less prone to deformation when the gas pressure inside the cooking cavity increases.

[0017] A closed region is provided between the first region and the second region, and at least a portion of the closed region is raised upward relative to the first region and the second region.

[0018] In this design, a closed area exists between the first and second zones. This closed area has no openings, allowing liquid and foam rising from the cooking cavity to be blocked by the closed area, causing bubbles to collide with and burst. Furthermore, while ensuring rapid and timely airflow to the float valve, the reduced overall opening ratio of the removable cover effectively blocks liquid from rising and breaks bubbles, decreasing the probability of liquid and foam contacting the float valve and exhaust pipe.

[0019] The removable cover is equipped with a sealing element, which has a groove facing the pressure-bearing inner cover. The fixing part is engaged with the groove for fixation.

[0020] In this solution, the sealing element is made of flexible material, so it can be inserted into the fixing part in an interference fit manner. The frictional resistance between the two is used to fix the detachable cover, which makes the installation and removal of the detachable cover simpler and more convenient. Users only need to push or pull the sealing element to insert or detach it from the fixing part to install or remove the detachable cover, which is convenient for cleaning the detachable cover.

[0021] The outer periphery of the fixing part is provided with a limiting protrusion, and the inner wall of the insertion groove is provided with a stop protrusion. After the detachable cover and the pressure-bearing inner cover are installed, the stop protrusion is located above the limiting protrusion so that the two stop and limit the detachable cover.

[0022] In this design, after the removable cover is installed, the stop protrusion is located above the limiting protrusion, thus limiting the removable cover downwards and preventing it from falling off the pressure-bearing inner cover. Simultaneously, since the fixing part does not limit the removable cover upwards, it allows the removable cover to float upwards relative to the pressure-bearing inner cover under the pressure of the gas pressure inside the cooking cavity, thereby reducing the risk of deformation of the removable cover under high pressure.

[0023] The exhaust pipe is located at the center of the pressure-bearing inner cover, and the exhaust pipe has an extension section located between the pressure-bearing inner cover and the removable cover, with an air inlet opening on the side wall of the extension section.

[0024] In this design, the lower end of the exhaust pipe is sealed, preventing the fluid in the cooking cavity from directly entering the exhaust pipe through the bottom. Instead, the fluid passes through the removable cover to the space between the removable cover and the pressure-bearing inner cover, and then enters the exhaust pipe through the air inlet located on the side wall of the exhaust pipe. Therefore, before the airflow enters the exhaust pipe, it is also affected by the bubble-breaking and blocking effect of the removable cover, causing some gas-liquid separation. This allows as much gas as possible to enter the exhaust pipe, while making it difficult for liquid and foam to enter, thereby reducing the risk of overflow when the pressure is released during exhaust.

[0025] The pressure-bearing inner cover is also equipped with a temperature measuring element. The detection end of the temperature measuring element extends between the pressure-bearing inner cover and the removable cover, and the detection end is set vertically and vertically with the first area.

[0026] In this design, the temperature measuring element is positioned vertically and vertically corresponding to the first area, allowing the airflow in the cooking cavity to directly contact the temperature measuring element after passing through the first air vent. This shortens the path of the airflow to the temperature measuring element, making the temperature measuring element detect temperature more quickly and sensitively, and greatly reducing the lag in temperature detection.

[0027] The diameter of the second vent is larger than the diameter of the first vent.

[0028] In this design, since the first region is located in the center of the removable cover, and the second region surrounds the outer periphery of the first region and is located in the edge region of the removable cover, and the gas in the cooking cavity is more distributed in the center region and the gas in the edge region is relatively less, the diameter of the second vent hole is increased to increase the amount of gas passing through the second vent hole, ensuring the sensitivity of the float valve and making the airflow through the center and edge of the removable cover more balanced.

[0029] The opening ratio of the second region shall not be less than 30%, and the diameter of the second vent shall not be less than 4.5 mm.

[0030] In this design, if the opening ratio and aperture of the first and second regions are too large, the removable cover will not effectively block and break up liquids and bubbles. Liquid will still easily rise above the removable cover and come into contact with components such as the float valve, exhaust pipe, and temperature sensor, resulting in functional limitations and severe contamination of the pressure-bearing inner cover. Conversely, if the opening ratio and aperture of the first and second regions are too small, while they can effectively block the rise of liquids and bubbles, the airflow efficiency will also decrease, causing a lag in the response of the float valve and temperature sensor. The aforementioned dimensional design ensures a more reasonable timing for the float valve's action, preventing it from rising too early before pressurization to facilitate gas expulsion from the cooking cavity, and preventing it from rising too late to allow for rapid pressurization within the cooking cavity. Furthermore, it facilitates timely and accurate temperature measurement by the temperature sensor, enabling more precise control of the pressure within the cooking cavity. Attached Figure Description

[0031] 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:

[0032] Figure 1 This is a cross-sectional view of the pot lid structure according to one embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of area A in the middle;

[0034] Figure 3This is a cross-sectional view of the pot lid structure according to one embodiment of the present utility model, wherein the exhaust pipe is in a state of being connected to the outside, and the arrow indicates the direction of airflow.

[0035] Figure 4 This is a schematic diagram of the detachable cover according to one embodiment of the present invention;

[0036] Figure 5 for Figure 4 A cross-sectional view of the removable cover;

[0037] Figure 6 This is an exploded view of the pot lid according to one embodiment of the present invention.

[0038] in:

[0039] 1. Pressure-bearing inner cover; 11. Cover tooth; 12. Float valve; 13. Exhaust pipe; 131. Extension section; 132. Air inlet; 133. Fixing part; 134. Limiting protrusion; 14. Temperature measuring element; 15. Driving element; 16. Solenoid valve; 17. Counterweight;

[0040] 2 Removable cover; 21 First area; 211 First vent; 22 Second area; 221 Second vent; 23 Raised portion; 24 Enclosed area; 25 Concave arc surface; 26 Pot opening sealing ring;

[0041] 3. Seal; 31. Stop protrusion; 32. Insertion groove. Detailed Implementation

[0042] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] like Figure 1 As shown, a pressure cooking appliance includes a lid and a pot body. The lid includes a pressure-bearing inner lid 1 and a removable lid 2 detachably fixed below the pressure-bearing inner lid 1. The pressure-bearing inner lid 1 and the pot body cooperate to form a cooking cavity. The pressure-bearing inner lid 1 is provided with an exhaust pipe 13. The lower end of the exhaust pipe 13 is provided with a fixing part 133 that cooperates with and is fixed to the removable lid 2. The removable lid 2 has a first region 21 and a second region 22 that are recessed. The first region 21 is lower than the second region 22. The first region 21 corresponds to the central region of the pressure-bearing inner lid 1. The second region 22 is located outside the first region 21. The first region 21 has a first vent 211, and the second region 22 has a second vent 221. The exhaust pipe 13 has an air inlet 132 located between the removable lid 2 and the pressure-bearing inner lid 1. The pressure-bearing inner lid 1 is also provided with a float valve 12, which is vertically corresponding to the second region 22.

[0048] In this invention, the pressure-bearing inner cover 1 cooperates with the pot body to form a cooking cavity, and the removable cover 2 is located inside the cooking cavity, between the pressure-bearing inner cover 1 and the food inside the pot body. When the food and liquid in the cooking cavity rise, they will first come into contact with the removable cover 2 and be blocked by the removable cover 2, thereby reducing the probability of the pressure-bearing inner cover 1 being directly contaminated. The removable cover 2 can be separated from the fixing part 133 of the pressure-bearing inner cover 1, so that the removable cover 2 can be removed, thus facilitating the user to clean it separately.

[0049] Preferably, both the pressure-bearing inner cover 1 and the removable cover 2 are made of metal, such as... Figure 1 As shown, the pressure-bearing inner cover 1 has a cover tooth 11 on its edge and a pot tooth on the rim of the pot body. The pressure-bearing inner cover 1 can rotate so that the cover tooth 11 and the pot tooth are aligned and locked together. At this time, the pot cover and the pot body are locked together and the pot can be pressed up; or the cover tooth 11 and the pot tooth are misaligned and unlocked. At this time, the pot cover and the pot body are unlocked and the pot cover can be opened.

[0050] like Figure 3 As shown, the removable cover 2 is provided with a first region 21 and a second region 22. The first region 21 has a first vent 211, and the second region 22 has a second vent 221. During the exhaust and depressurization process, the gas in the cooking cavity can pass through the first vent 211 and the second vent 221 to reach the space between the removable cover 2 and the pressure-bearing inner cover 1, and then be discharged through the exhaust pipe 13. The float valve 12 is arranged vertically and vertically corresponding to the second region 22, so that the airflow in the cooking cavity can directly act on the float valve 12 after passing through the second vent 221, thereby shortening the path of the airflow to the float valve 12, making the airflow reach the float valve 12 more quickly, and making the float valve 12 react more quickly, so that it can be pushed up and blocked by the airflow in time. The pot can enter the pressure cooking stage more quickly, improving the cooking efficiency.

[0051] Furthermore, the first region 21 is positioned lower than the second region 22, making the first region 21 closer to the food inside the cooking cavity, while the second region 22 is farther away. Since the first region 21 is located in the center of the pressure-bearing inner cover 1, during cooking, the heat from the heating device tends to concentrate in the center of the cooking cavity, resulting in a better heating effect at the center than at the edges. Therefore, when the liquid in the cooking cavity boils, the boiling at the center is more intense. Consequently, the boiling liquid and foam that rise to the surface will first contact the first region 21 in the center. The first vent 211 within the first region 21 can act as a barrier and break bubbles, weakening the kinetic energy of the rising liquid and accelerating the bursting of bubbles, allowing gas to smoothly enter above the removable cover 2, while the liquid is blocked below the removable cover 2. The second zone 22 is farther away from the ingredients, making it more difficult for soup and foam to reach it. Therefore, by increasing the distance between the second zone 22 (the location corresponding to the float valve 12) and the ingredients, and by using the first zone 21 to block and break the bubbles in the boiling soup, the risk of liquid flowing into the float valve 12 through the second vent 221 is greatly reduced, ensuring the cleanliness of the float valve 12 and thus ensuring the reliability of the float valve 12.

[0052] It is understandable that the airflow passing through the second vent 221 can directly reach the float valve 12. Of course, the airflow entering between the removable cover 2 and the pressure-bearing inner cover 1 through the first vent 211 can also reach the float valve 12.

[0053] Preferably, such as Figure 1 , Figure 3 As shown, the removable cover 2 and the pressure-bearing inner cover 1 are coaxially arranged, so the center of the pressure-bearing inner cover 1 also corresponds to the center of the removable cover 2. The pressure-bearing inner cover 1 and the pot body cooperate to form a cooking cavity, so the center of the pressure-bearing inner cover 1 also corresponds to the center of the cooking cavity.

[0054] The first region 21 is located in the center of the removable cover 2, but the present invention does not limit the position of the second region 22. It can be located on one side of the first region 21, or as shown in the figure. Figure 4 As shown, it is arranged in a ring around the outer periphery of the first region 21. In either case, the float valve 12 is offset from the center of the cooking cavity and is located on the outer ring of the removable cover 2, thereby reducing the risk of foam and liquid rushing to the float valve 12.

[0055] Preferably, such as Figure 1 , Figure 3 As shown, the exhaust pipe 13 is fixed to the center of the pressure-bearing inner cover 1 so as to cooperate and be fixed with the center of the removable cover 2. Specifically, the center of the removable cover 2 is provided with a mating part for cooperating and fixing with the fixing part 133, a first region 21 surrounds the outer periphery of the mating part, and a second region 22 surrounds the outer periphery of the first region 21.

[0056] Specifically, such as Figure 4 As shown, a plurality of first vent holes 211 are provided in the first region 21, and the first vent holes 211 are arranged radially from the inside to the outside. A plurality of second vent holes 221 are provided in the second region 22, and the second vent holes 221 are arranged at intervals along the circumference of the removable cover 2.

[0057] It should be noted that the present invention does not limit the formation of the first region 21 and the second region 22. In one embodiment, the detachable cover 2 is provided with a first recessed platform and a second recessed platform, wherein the first recessed platform is lower than the second recessed platform, so that the platform surface of the first recessed platform constitutes the first region 21 and the platform surface of the second recessed platform constitutes the second region 22.

[0058] As a preferred embodiment of this utility model, such as Figure 5 As shown, the removable cover 2 has a concave arc surface. The first region 21 and the second region 22 are both located on the concave arc surface, and the first region 21 is located in the central region of the concave arc surface, while the second region 22 surrounds the outer periphery of the first region 21.

[0059] The removable cover 2 has a concave structure, forming a concave arc surface on its surface. This makes the removable cover 2 gradually decrease in height from the edge to the center. The central area of ​​the concave arc surface corresponds to the central area of ​​the pressure-bearing cover. The second area 22 is located on the outer ring of the first area 21, so that the float valve 12 is located on the edge area of ​​the pressure-bearing inner cover 1, which is away from the center of the pressure-bearing inner cover 1, i.e., the center of the cooking cavity. This further reduces the probability of liquid and foam rising and coming into contact with the float valve 12 due to violent boiling at the center of the cooking cavity. At the same time, the overall concave structure of the removable cover 2 also reduces the manufacturing difficulty and improves the aesthetics of the removable cover 2.

[0060] Preferably, the removable cover 2 has a horizontally extending flange at its edge, and the concave arc surface extends from the inside of the flange toward the center, so that the removable cover 2 has a structure that is low in the center and high around the edges.

[0061] Furthermore, such as Figure 1 , Figure 3 As shown, at least one raised portion 23 protruding toward the pressure-bearing inner cover 1 relative to the first region 21 and the second region 22 is provided between the first region 21 and the second region 22.

[0062] Since the removable cover 2 has a concave structure, its structural strength is relatively low. By setting a raised part 23, which protrudes upward relative to the first region 21 and the second region 22, the structural strength of the removable cover 2 can be improved, so that the removable cover 2 is less likely to deform when the gas pressure inside the cooking cavity increases.

[0063] Specifically, such as Figure 4 As shown, the raised portion 23 is a ring-shaped rib, surrounding at least a portion of the outer periphery of the first region 21. Figure 4 As shown, there are multiple raised portions 23, which are arranged at radial intervals along the removable cover 2.

[0064] Preferably, such as Figure 1 , Figure 3 , Figure 4 As shown, a closed region 24 is provided between the first region 21 and the second region 22, and at least a portion of the closed region 24 is raised upward relative to the first region 21 and the second region 22.

[0065] A closed region 24 is located between the first region 21 and the second region 22. This closed region 24 has no openings, allowing liquid and foam rising from the cooking cavity to be blocked by it, causing bubbles to collide with and burst. Furthermore, while ensuring airflow reaches the float valve 12 quickly and promptly, the reduced overall opening ratio of the removable cover 2 effectively blocks liquid from rising and breaks bubbles, decreasing the probability of liquid and foam contacting the float valve 12 and the exhaust pipe 13.

[0066] This utility model does not limit the fixing method of the exhaust pipe 13 and the removable cover 2. In a preferred embodiment, such as... Figure 1 , Figure 2 , Figure 3 As shown, the removable cover 2 is provided with a sealing element 3. The sealing element 3 has an insertion groove 32 facing the pressure-bearing inner cover 1. The fixing part 133 is inserted and fixed in the insertion groove 32.

[0067] The sealing element 3 is made of flexible material, so it can be inserted into the fixing part 133 by interference fit. The frictional resistance between the two is used to fix the removable cover 2, which makes the installation and removal of the removable cover 2 simpler and more convenient. Users only need to push or pull the sealing element 3 to insert or detach it from the fixing part 133 to install or remove the removable cover 2, which is convenient for cleaning the removable cover 2.

[0068] Specifically, such as Figure 4 , Figure 5 As shown, the removable cover 2 has an opening in the center, and the sealing element 3 is snapped into and fixed to the opening.

[0069] Of course, the fixing part 133 may not be fixed to the sealing member 3 by an interference fit. For example, in a preferred embodiment of this invention, such as... Figure 2 As shown, a limiting protrusion 134 is provided on the outer periphery of the fixing part 133, and a stop protrusion 31 is provided on the inner wall of the insertion groove 32. After the removable cover 2 and the pressure-bearing inner cover 1 are installed, the stop protrusion 31 is located above the limiting protrusion 134 so that the two stop and cooperate to limit the removable cover 2.

[0070] After the removable cover 2 is installed, the stop protrusion 31 is located above the limiting protrusion 134, thereby limiting the removable cover 2 downward and preventing it from falling off the pressure-bearing inner cover 1. At the same time, since the fixing part 133 does not limit the removable cover 2 upward, the removable cover 2 can float upward relative to the pressure-bearing inner cover 1 under the action of air pressure in the cooking cavity, thereby reducing the risk of deformation of the removable cover 2 under high pressure.

[0071] Specifically, the stop protrusion 31 can be a ring-shaped rib surrounding the fixing part 133, or it can be multiple ribs spaced apart circumferentially along the fixing part 133.

[0072] Specifically, such as Figure 3 , Figure 6As shown, the removable lid 2 has a pot opening sealing ring 26 on its edge, and the pot body also includes an inner liner. When the lid and the pot body are closed, the pot opening sealing ring 26 abuts against the rim of the inner liner to seal. The pressure-bearing inner lid 1 is also provided with a limiting part. When the removable lid 2 is pushed upward by the air pressure inside the pot and moves upward a certain distance, it abuts against the limiting part, so that the limiting part of the removable lid 2 forms an upward limit, ensuring a reliable seal between the pot opening sealing ring 26 and the inner liner, and preventing the pot opening sealing ring 26 from separating from the inner liner.

[0073] Preferably, such as Figure 1 , Figure 2 As shown, the exhaust pipe 13 is located at the center of the pressure-bearing inner cover 1. The exhaust pipe 13 has an extension 131 located between the pressure-bearing inner cover 1 and the removable cover 2. The air inlet 132 is opened on the side wall of the extension 131.

[0074] The lower end of the exhaust pipe 13 is closed, so that the fluid in the cooking cavity cannot directly enter the interior of the exhaust pipe 13 through the bottom end of the exhaust pipe 13. Instead, it can only pass through the removable cover 2 to reach the space between the removable cover 2 and the pressure-bearing inner cover 1, and then enter the exhaust pipe 13 through the air inlet 132 located on the side wall of the exhaust pipe 13. Therefore, before the airflow enters the exhaust pipe 13, it will also be affected by the bubble breaking and blocking effect of the removable cover 2, causing some gas and liquid to separate. This allows gas to enter the exhaust pipe 13 as much as possible, while liquid and foam are difficult to enter, thereby reducing the risk of overflow when venting and depressurizing.

[0075] Specifically, such as Figure 1 , Figure 3 , Figure 6 As shown, a counterweight 17 is provided at the top of the exhaust pipe 13 to block the exhaust pipe 13 during pressure cooking, thus isolating the cooking chamber from the outside. After pressure cooking is completed, the counterweight 17 is lifted to connect the exhaust pipe with the outside pipe, at which time the pressure can be released.

[0076] Preferably, such as Figure 1 , Figure 3 , Figure 6 As shown, the pot lid is also equipped with a solenoid valve 16 and a drive component 15. The solenoid valve 16 is electrically connected to the control unit so that it can control the movement of the drive component 15 according to the program, so that the drive component 15 lifts the weight 17. Preferably, during the heating stage before pressurization, the solenoid valve 16 operates to drive the drive component 15, causing the drive component 15 to lift the weight 17. At this time, the airflow inside the pot is discharged together through the float valve 12 and the exhaust pipe 13, reducing the rise of foam in the cooking cavity during the pressurization stage. After pressurization, the float valve 12 is lifted, and exhaust cannot be discharged through the float valve 12. The solenoid valve 16 can work in conjunction with the temperature measurement data of the temperature measuring element 14. When the temperature inside the cooking cavity reaches the set value, the solenoid valve 16 operates, driving the drive component 15 to lift the weight 17, causing the exhaust pipe 13 to discharge, thereby reducing the boiling degree in the cooking cavity and reducing the rise of foam and liquid.

[0077] Of course, pressure cookers can also be designed with a manual venting structure, that is, a venting button is provided on the lid. By pressing the venting button, the user can drive the drive component 15 to move and lift the weight 17.

[0078] In a preferred embodiment, such as Figure 1 , Figure 3 As shown, the pressure-bearing inner cover 1 is also provided with a temperature measuring element 14. The detection end of the temperature measuring element 14 extends between the pressure-bearing inner cover 1 and the removable cover 2, and the detection end is arranged vertically and vertically with the first area 21.

[0079] The temperature measuring element 14 is arranged vertically and vertically corresponding to the first area 21, so that the airflow in the cooking cavity can directly contact the temperature measuring element 14 after passing through the first air passage 211, which shortens the path of the airflow to the temperature measuring element 14, making the temperature measuring element 14 detect temperature more quickly and sensitively, and greatly reducing the lag in temperature detection.

[0080] In one embodiment, the diameter of the second vent 221 is larger than the diameter of the first vent 211.

[0081] Since the first region 21 is located in the center of the removable cover 2, and the second region 22 surrounds the outer periphery of the first region 21 and is located in the edge region of the removable cover 2, and the gas in the cooking cavity is more distributed in the center region and the gas in the edge region is relatively less, by increasing the diameter of the second vent 221, the amount of gas passing through the second vent 221 is increased, ensuring the sensitivity of the float valve 12 and making the airflow passing through the center and edge of the removable cover 2 more balanced.

[0082] In a preferred embodiment, the opening area of ​​the first region 21 is not less than 900 mm2, and the diameter of the first vent 211 is not less than 4.5 mm; the opening ratio of the second region 22 is not less than 30%, and the diameter of the second vent 221 is not less than 4.5 mm.

[0083] If the opening ratio and aperture of the first region 21 and the second region 22 are too large, the removable cover 2 will not be able to effectively block and break up liquids and bubbles. Liquid will still easily rise above the removable cover 2 and come into contact with components such as the float valve 12, exhaust pipe 13, and temperature sensor 14, resulting in limited functionality and serious contamination of the pressure-bearing inner cover 1. If the opening ratio and aperture of the first region 21 and the second region 22 are too small, although they can effectively block the rise of liquids and bubbles, the airflow efficiency will also decrease, causing a lag in the response of the float valve 12 and the temperature sensor 14. Through the above-mentioned dimensional design, the timing of the float valve 12's action is more reasonable, preventing it from rising too early before pressurization to facilitate the exhaust of gas from the cooking cavity, and preventing it from rising too late to allow for rapid pressurization within the cooking cavity. Moreover, it also facilitates timely and accurate temperature measurement by the temperature sensor 14, thereby enabling more precise control of the pressure within the cooking cavity.

[0084] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0085] 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.

[0086] 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 lid and a pot body, the lid comprising a pressure-bearing inner lid and a removable lid detachably fixed below the pressure-bearing inner lid, the pressure-bearing inner lid cooperating with the pot body to form a cooking cavity, characterized in that, The pressure-bearing inner cover is provided with an exhaust pipe. The lower end of the exhaust pipe is provided with a fixing part that cooperates with and is fixed to the detachable cover. The detachable cover has a first area and a second area that are recessed. The first area is lower than the second area. The first area corresponds to the center area of ​​the pressure-bearing inner cover. The second area is located outside the first area. The first area has a first vent hole, and the second area has a second vent hole. The exhaust pipe has an air inlet hole located between the detachable cover and the pressure-bearing inner cover. The pressure-bearing inner cover is also provided with a float valve, which is vertically corresponding to the second area.

2. The pressure cooking appliance according to claim 1, characterized in that, The removable cover has a concave arc surface, with both the first region and the second region located on the concave arc surface. The first region is located in the central region of the concave arc surface, and the second region surrounds the outer periphery of the first region.

3. The pressure cooking appliance according to claim 2, characterized in that, At least one protrusion is provided between the first region and the second region, which protrudes toward the pressure-bearing inner cover relative to the first region and the second region.

4. The pressure cooking appliance according to claim 1, characterized in that, A closed region is provided between the first region and the second region, and at least a portion of the closed region is raised upward relative to the first region and the second region.

5. The pressure cooking appliance according to claim 1, characterized in that, The removable cover is provided with a sealing element, which has an insertion groove facing the pressure-bearing inner cover. The fixing part is inserted and fixed with the insertion groove.

6. The pressure cooking appliance according to claim 5, characterized in that, The outer periphery of the fixing part is provided with a limiting protrusion, and the inner wall of the insertion groove is provided with a stop protrusion. After the detachable cover and the pressure-bearing inner cover are installed, the stop protrusion is located above the limiting protrusion so that the two stop and cooperate to limit the detachable cover.

7. The pressure cooking appliance according to claim 1, characterized in that, The exhaust pipe is located at the center of the pressure-bearing inner cover, and the exhaust pipe has an extension section located between the pressure-bearing inner cover and the removable cover, and the air inlet is opened on the side wall of the extension section.

8. The pressure cooking appliance according to claim 1, characterized in that, The pressure-bearing inner cover is also provided with a temperature measuring element. The detection end of the temperature measuring element extends between the pressure-bearing inner cover and the removable cover, and the detection end is arranged vertically and vertically corresponding to the first area.

9. The pressure cooking appliance according to claim 1, characterized in that, The diameter of the second vent is larger than the diameter of the first vent.

10. The pressure cooking appliance according to claim 1, characterized in that, The opening ratio of the second region is not less than 30%, and the diameter of the second air passage is not less than 4.5 mm.

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