An explosion-proof pot cover and electric pressure cooker

Abstract

This invention provides an explosion-proof pot lid, comprising a lid shell and an inner lid installed at the bottom of the lid shell; the inner lid includes a frame, and a support plate is fixedly provided on the inner wall of the frame; the support plate has two air holes, and a support tube is fixedly provided at the top of the air holes, with an exhaust valve and a safety valve respectively installed on the two support tubes; the tops of the exhaust valve and the safety valve extend through the lid shell and outward; an anti-clogging structure is installed on the support plate corresponding to the two air holes, and the anti-clogging structure has a self-cleaning function; a driving structure is installed on the support plate, which is driven by the high pressure inside the pot, and is used to drive the anti-clogging structure to perform self-cleaning action and maintain normal ventilation; the high pressure inside the pot is greater than the upper limit pressure of the safety valve; it has a built-in structural component that can clean the anti-clogging component, which can be triggered when the gas pressure inside the pot exceeds the upper limit pressure of the safety valve, and the valve is restored to ventilation and pressure relief by cleaning the anti-clogging component, thereby achieving the explosion-proof effect.

Description

Technical Field

[0001] This invention relates to the field of pressure cookers, and more specifically, to an explosion-proof lid and an electric pressure cooker. Background Technology

[0002] Electric pressure cookers are widely used in modern home cooking. They increase the boiling point of water by raising the pressure inside the pot, thus achieving rapid heating and tender cooking of food. However, pressure cooking also brings potential safety risks, the most critical of which is the risk of explosion caused by abnormally high pressure inside the pot.

[0003] Although current electric pressure cookers are equipped with exhaust valves and safety valves to protect against high pressure, during daily use, especially when stewing beans or high-starch foods that are prone to overflowing, detached bean skins or other debris can easily adhere to or clog the anti-blocking cover, causing poor or even no exhaust. This can lead to a continuous increase in internal pressure and potentially an explosion, posing a certain risk and requiring improvement. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose an explosion-proof pot lid and an electric pressure cooker, which has a built-in structural component that can clean the anti-blocking component. When the gas pressure inside the pot exceeds the upper limit pressure of the safety valve, it can be triggered. By cleaning the anti-blocking component, the valve can be restored to gas flow and pressure relief, thereby achieving the explosion-proof effect.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This invention provides an explosion-proof pot lid, comprising a lid shell and an inner lid installed at the bottom of the lid shell; the inner lid includes a frame, and a support plate is fixedly provided on the inner wall of the frame; the support plate has two air holes, and a support tube is fixedly provided at the top of the air holes, with an exhaust valve and a safety valve respectively installed on the two support tubes; the tops of the exhaust valve and the safety valve extend through the lid shell and outward; an anti-clogging structure is installed on the support plate corresponding to the two air holes, and the anti-clogging structure has a self-cleaning function; a driving structure is installed on the support plate, and the driving structure is driven by the high pressure inside the pot to drive the anti-clogging structure to perform self-cleaning action and maintain normal ventilation; the high pressure inside the pot is greater than the upper limit pressure of the safety valve.

[0007] In a preferred embodiment of the present invention, the anti-clogging structure includes an anti-clogging cap and a cleaning component; the anti-clogging cap is installed at the bottom of the air hole; the cleaning component includes a scraper and a transmission component; the scraper is placed on the outside of the anti-clogging cap, and the transmission component is rotatably disposed inside the support tube, with its bottom end connected to the scraper, causing the scraper to rotate against the outer wall of the anti-clogging cap; the scraper has multiple first perforations arranged in a circular array around the center, and the first perforations extend along the axial direction; the gas inside the pot passes through the first perforations, enters the support tube through the anti-clogging cap, and is discharged to the outside through the corresponding valve body.

[0008] In a preferred embodiment of the present invention, a first convex tube is fixedly provided on the outer side of the bottom end of the air hole, and the inner wall of the first convex tube is provided with threads; the anti-clogging cap includes a column frame, a second convex tube is fixedly provided on the top end of the column frame, the outer diameter of the second convex tube is adapted to the inner diameter of the first convex tube, the outer wall of the second convex tube is provided with threads, and the second convex tube is threadedly connected to the first convex tube; a plurality of second perforations are provided through the bottom side wall of the column frame, and a filter cylinder for blocking the second perforations is fixedly provided on the outer wall of the column frame.

[0009] In a preferred embodiment of the present invention, the outer diameter of the filter cartridge is adapted to the outer diameter of the first convex tube, and a first circular hole is provided through the center of the bottom surface of the column frame; a clamping head is provided at the top of the transmission component, the outer diameter of the bottom of the clamping head is adapted to the inner diameter of the support tube, the outer diameter of the clamping head is larger than the diameter of the air hole, and the bottom of the clamping head slides against the outer wall of the upper port of the air hole; a third through hole is provided on the clamping head, penetrating the upper and lower walls; an insertion tube is provided at the center of the bottom inner wall of the scraper cap, the outer diameter of the insertion tube is adapted to the diameter of the first circular hole; the inner diameter of the scraper cap is adapted to the diameter of the filter cartridge; a rod is provided at the bottom of the transmission component, the rod is inserted into the insertion tube and threadedly connected; so that the scraper cap rotates tightly against the outer wall of the filter cartridge and the first convex tube.

[0010] In a preferred embodiment of the present invention, a first magnetic ring is fixedly sleeved on the outer side of the card head, and the outer diameter of the first magnetic ring is adapted to the inner diameter of the support tube; a gear component is rotatably sleeved on the outer side of the support tube, and a second magnetic ring is fixedly embedded on the top of the inner ring of the gear component; the gear component is connected to the drive structure for transmission and is driven to rotate by the drive structure.

[0011] In a preferred embodiment of the present invention, a support ring is fixedly provided on the top outer wall of the scraper cap component. The top surface of the support ring is provided with a first groove forming a closed loop around the center. A third magnetic ring is fixedly embedded in the first groove. The top surface of the support ring slides against the bottom surface of the support plate. A second groove is provided on the top surface of the support plate at the bottom outer side of the support tube. The second groove forms a closed loop around the center of the support tube, making this part of the support plate a thin-walled structure. A convex ring is fixedly provided on the bottom surface of the gear component. The outer diameter of the convex ring is adapted to the diameter of the second groove. The convex ring slides against the bottom of the second groove. A fourth magnetic ring is fixedly embedded on the bottom surface of the convex ring. The fourth magnetic ring and the third magnetic ring are magnetically attracted to each other.

[0012] In a preferred embodiment of the present invention, the driving structure includes a push assembly, a swing linkage, and a tension spring; a fourth through hole is provided through the support plate; a gear is fixedly provided at one end of the swing linkage, the gear is rotatably mounted on the support plate, and meshes with two gear components for transmission; a push rod is fixedly provided on one side of the gear, the push rod extends toward the fourth through hole and is offset from the center of the fourth through hole; the push assembly includes a cap and a push block, the cap is installed on the outer side of the bottom end of the fourth through hole; the bottom of the cap is a flexible cover structure, the push block is installed on the inner wall of the bottom of the cap, and the push block is a frustoconical structure; when the gas pressure inside the pot exceeds the upper limit of the safety valve, the push cap and push block move upward, the push block pushes the push rod to deviate from rotation, driving the gear components to rotate, thereby prompting the anti-clogging structure to perform self-cleaning; the tension spring is installed on the side of the push rod near the push block, providing a restoring force for the swing linkage.

[0013] In a preferred embodiment of the present invention, a third convex tube is fixedly provided on the outer side of the bottom end of the fourth perforation, and the outer wall of the third convex tube is threaded; the cap includes a collar, the inner wall of which is threaded, and the collar is threadedly connected to the third convex tube; a soft rubber cover is fixedly provided on the bottom surface of the collar, the soft rubber cover having a downwardly convex arc-shaped cover structure, a support block is fixedly connected to the recessed part of the bottom inner wall of the soft rubber cover, a guide rod is fixedly provided on the top surface of the support block, and the guide rod extends upward beyond the top surface of the support plate; a second circular hole is provided through the push block along the axis, the diameter of the second circular hole is adapted to the diameter of the guide rod, and the push block is rotatably sleeved on the guide rod.

[0014] In a preferred embodiment of the present invention, the inner diameter of the third convex tube is larger than the diameter of the fourth perforation; a conical spring is provided inside the soft rubber cover, the maximum outer diameter of the top of the conical spring is adapted to the inner diameter of the third convex tube, and the outer wall of the top of the conical spring abuts against the inner wall of the third convex tube; the top of the conical spring abuts against the bottom surface of the support plate; the outer diameter of the bottom of the conical spring is smaller than the outer diameter of the support block, and the bottom of the conical spring presses against the top surface of the support block.

[0015] The present invention also provides an electric pressure cooker, including the aforementioned explosion-proof lid.

[0016] The beneficial effects of this invention are as follows:

[0017] The present invention provides an explosion-proof pot lid and an electric pressure cooker. The explosion-proof pot lid includes a lid shell and an inner lid installed at the bottom of the lid shell. The support plate of the inner lid is provided with two air holes, and a support tube is fixedly provided at the top of the air holes. An exhaust valve and a safety valve are respectively installed on the two support tubes. The tops of the exhaust valve and the safety valve extend through the lid shell and outward. The exhaust valve and the safety valve serve as exhaust valves during daily cooking and can meet the conventional pressure relief and exhaust needs.

[0018] The support plate is equipped with an anti-clogging structure at the location corresponding to the two air holes. This structure can filter the air inlet of the exhaust valve and safety valve to prevent food impurities from entering the valve components and causing blockage or damage.

[0019] Among them, the anti-clogging structure has a self-cleaning function, which can prevent the filter part from becoming clogged and maintain smooth ventilation.

[0020] Furthermore, a drive structure is installed on the support plate. The drive structure is driven by the high pressure inside the pot and is used to drive the anti-clogging structure to perform self-cleaning action and maintain normal ventilation. The high pressure inside the pot is greater than the upper limit pressure of the safety valve. When the gas pressure inside the pot exceeds the upper limit pressure of the safety valve, the self-cleaning function can be triggered. The gas pressure is used as power to drive the anti-clogging structure to clean the filter part, so that the valve can restore ventilation and depressurization, thereby achieving the explosion-proof effect. Attached Figure Description

[0021] Figure 1 This is a first-view perspective three-dimensional structural diagram of an explosion-proof pot lid provided in a specific embodiment of the present invention;

[0022] Figure 2 This is a second-view perspective three-dimensional structural diagram of an explosion-proof pot lid provided in a specific embodiment of the present invention;

[0023] Figure 3 This is a first-view sectional view of an explosion-proof pot lid provided in a specific embodiment of the present invention;

[0024] Figure 4 This is a second-view cross-sectional view of an explosion-proof pot lid provided in a specific embodiment of the present invention;

[0025] Figure 5 This is a partial internal structure diagram of an explosion-proof pot lid provided in a specific embodiment of the present invention;

[0026] Figure 6 This is a first-view three-dimensional unfolded structural diagram of an explosion-proof pot lid provided in a specific embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional unfolded structure of an explosion-proof pot lid from a second perspective, provided in a specific embodiment of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the driving structure and anti-blocking structure provided in a specific embodiment of the present invention;

[0029] Figure 9 This is a first-view three-dimensional unfolded structural diagram of the anti-blocking structure provided in a specific embodiment of the present invention;

[0030] Figure 10 This is a second-view three-dimensional unfolded structural diagram of the anti-blocking structure provided in a specific embodiment of the present invention;

[0031] Figure 11This is a three-dimensional structural diagram of the cap provided in a specific embodiment of the present invention.

[0032] In the picture:

[0033] 100. Cover shell; 200. Inner cover; 210. Frame; 220. Support plate; 221. Air hole; 222. Second groove; 223. Fourth perforation; 230. Support tube; 240. First convex tube; 250. Third convex tube;

[0034] 300, Exhaust valve; 400, Safety valve; 500, Anti-clogging structure; 510, Anti-clogging cap; 511, Column frame; 512, Second protruding tube; 513, Second perforation; 514, Filter cartridge; 515, First round hole; 520, Cleaning assembly; 521, Scraper cap; 5211, First perforation; 5212, Insert tube; 5213, Support ring; 5214, Third magnetic ring; 522, Transmission component; 5221, Clamp; 5222, Insert rod; 5223, First magnetic ring; 530, Gear component; 531, Second magnetic ring; 532, Fourth magnetic ring;

[0035] 600. Drive structure; 610. Pushing assembly; 611. Cap; 6111. Collar; 6112. Soft rubber cover; 6113. Support block; 6114. Guide rod; 612. Push block; 620. Swinging link; 621. Gear part; 622. Push rod; 630. Tension spring; 640. Conical spring. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 6 As shown in the figure, a specific embodiment of the present invention discloses an explosion-proof pot lid, including a lid shell 100 and an inner lid 200 installed at the bottom of the lid shell 100; the inner lid 200 includes a frame 210, and a support plate 220 is fixedly provided on the inner wall of the frame 210; the support plate 220 is provided with two air holes 221, and a support tube 230 is fixedly provided at the top of the air holes 221. An exhaust valve 300 and a safety valve 400 are respectively installed on the two support tubes 230; the tops of the exhaust valve and the safety valve extend through the lid shell and outward; an anti-clogging structure 500 is installed on the support plate 220 at the position corresponding to the two air holes, and the anti-clogging structure has a self-cleaning function; a driving structure 600 is installed on the support plate 220, and the driving structure is driven by the high pressure inside the pot to drive the anti-clogging structure 500 to perform self-cleaning action and maintain normal ventilation; the high pressure inside the pot is greater than the upper limit pressure of the safety valve.

[0038] The aforementioned explosion-proof pot lid is equipped with an exhaust valve and a safety valve, which serve as exhaust valves for daily cooking and can meet the normal pressure relief and exhaust needs. The anti-clogging structure filters the air inlet of the exhaust valve and safety valve to prevent food impurities from entering the valve and causing blockage or damage to the interior.

[0039] Among them, the anti-clogging structure has a self-cleaning function, which can prevent the filter part from becoming clogged and maintain smooth ventilation.

[0040] Furthermore, when the gas pressure inside the pot exceeds the upper limit pressure of the safety valve, it can drive the drive structure, thereby driving the anti-clogging structure to perform a self-cleaning action. By using gas pressure as power, the anti-clogging structure is driven to clean the filter part, so that the valve can be restored to ventilation and pressure relief, thereby achieving the explosion-proof effect.

[0041] The support plate is equipped with a float valve, and the inside of the cover is equipped with an interlocking assembly. The float valve and the interlocking assembly work together. When the internal gas pressure of the electric pressure cooker increases, enough to push the float valve up to the preset position, the interlocking assembly is locked. When the internal gas pressure of the electric pressure cooker decreases, insufficient to support the float valve, the float valve descends to the preset position, and the interlocking assembly returns to the unlocked state. This structure is a commonly used combination structure in electric pressure cookers and is well known to those skilled in the art, so it will not be described in detail.

[0042] Furthermore, such as Figure 3 , Figures 6 to 10 As shown, the anti-clogging structure 500 includes an anti-clogging cap 510 and a cleaning component 520; the anti-clogging cap 510 is installed at the bottom of the air hole 221 and plays a filtering role to prevent food debris from entering the valve.

[0043] The cleaning component 520 includes a scraper cap 521 and a transmission component 522. The scraper cap 521 covers the outside of the anti-clogging cap 510, and the transmission component 522 is rotatably mounted inside the support tube 230. The bottom end of the transmission component 522 is connected to the scraper cap 521, allowing the scraper cap to rotate against the outer wall of the anti-clogging cap. Using the support tube as the mounting point for the transmission component means that the transmission part can be extended above the support plate, which facilitates the installation of other structural components. The scraper cap and the transmission component are separate structures, which facilitates the processing and production of each structural component. It is also convenient for assembly and assembly, and it is also convenient for the replacement of individual parts later; the scraper cap 521 is provided with multiple first perforations 5211 arranged in a circular array around the center, and the first perforations extend along the axial direction; the gas in the pot passes through the first perforation, enters the support tube through the anti-clogging cap, and is discharged to the outside through the corresponding valve body; it provides a ventilation part to ensure normal ventilation; and the first perforation is defined as a vertically extending strip-shaped hole structure, which can be used as the pushing and scraping part when the scraper cap rotates, thereby improving the cleaning effect.

[0044] Furthermore, a first protruding tube 240 is fixedly provided on the outer side of the bottom end of the vent 221, and the inner wall of the first protruding tube is threaded; the anti-clogging cap 510 includes a column frame 511, and a second protruding tube 512 is fixedly provided on the top end of the column frame 511. The outer diameter of the second protruding tube is adapted to the inner diameter of the first protruding tube, and the outer wall of the second protruding tube is threaded. The second protruding tube 512 is threadedly connected to the first protruding tube 240; a plurality of second through holes 513 are provided through the bottom side wall of the column frame 511, and a filter cartridge 514 for blocking the second through holes is fixedly provided on the outer wall of the column frame 511; this structural design can easily prevent The easy assembly and disassembly of the plug facilitates production and assembly, as well as disassembly and replacement. The filter cartridge provides a filtering effect, effectively preventing food debris from entering the valve. It should be noted that the scraper cap adopts a structural design with multiple first perforations arranged in a circumferential array. There are blocking parts between the first perforations, which can block some of the holes in the filter cartridge. When the scraper cap is triggered and rotates, the blocked holes are exposed during the rotation, allowing for pressure relief. At the same time, the blocked parts are scraped and cleaned during the rotation, restoring airflow to some of the holes.

[0045] Furthermore, the outer diameter of the filter cartridge 514 is adapted to the outer diameter of the first convex tube 240, and a first circular hole 515 is provided through the center of the bottom surface of the column frame 511; the top of the transmission component 522 is provided with a clamp 5221, the bottom outer diameter of the clamp is adapted to the inner diameter of the support tube, the outer diameter of the clamp 5221 is larger than the diameter of the air hole 221, and the bottom of the clamp 5221 slides against the outer wall of the upper port of the air hole 221; the clamp is provided with a third through hole penetrating the upper and lower walls; the clamp can be restricted to rotate and be installed in the support tube without falling off;

[0046] The scraper cap component 521 has an insertion tube 5212 at the center of its bottom inner wall. The outer diameter of the insertion tube 5212 is adapted to the diameter of the first circular hole 515. The inner diameter of the scraper cap component 521 is adapted to the diameter of the filter cartridge 514. The bottom of the transmission component 522 has an insertion rod 5222, which is inserted into the insertion tube 5212 and threadedly connected. This allows the scraper cap component to rotate tightly against the outer wall of the filter cartridge and the first convex tube. It also limits the connection between the scraper cap component, the transmission component, and the anti-clogging cap, providing rotational support and limitation for the scraper cap component. The overall structure is compact. It also allows the inner wall of the scraper cap component to slide against the outer wall of the anti-clogging cap, achieving an effective scraping and cleaning effect.

[0047] Furthermore, a first magnetic ring 5223 is fixedly sleeved on the outer side of the card head 5221, and the outer diameter of the first magnetic ring 5223 is adapted to the inner diameter of the support tube 230; a gear component 530 is rotatably sleeved on the outer side of the support tube 230, and a second magnetic ring 531 is fixedly embedded on the top of the inner ring of the gear component 530; the gear component is connected to the drive structure for transmission and is driven to rotate by the drive structure; the transmission component rotates with the gear component through magnetic attraction, thereby driving the scraper cap component to rotate, thereby realizing the cleaning and unblocking action.

[0048] Furthermore, a support ring 5213 is fixedly provided on the top outer wall of the scraper 521. The top surface of the support ring 5213 is provided with a first groove forming a closed loop around the center. A third magnetic ring 5214 is fixedly embedded in the first groove. The top surface of the support ring slides against the bottom surface of the support plate. A second groove 222 is provided on the top surface of the support plate 220 at the bottom outer side of the support tube. The second groove forms a closed loop around the center of the support tube, making this part of the support plate a thin-walled structure. A convex ring is fixedly provided on the bottom surface of the gear 530. The outer diameter of the convex ring is adapted to the diameter of the second groove. The convex ring slides against the bottom of the second groove. A fourth magnetic ring 532 is fixedly embedded on the bottom surface of the convex ring. The fourth magnetic ring and the third magnetic ring attract each other. The magnetic attraction force is increased by the cooperation of the third magnetic ring and the fourth magnetic ring, so that the scraper can rotate smoothly under the drive of the transmission component and the gear component, and also provides sufficient thrust to push and scrape away the blockage impurities.

[0049] Furthermore, the top surface of the third magnetic ring is lower than the top surface of the support ring, with a gap of less than 1 mm; the bottom surface of the fourth magnetic ring is higher than the bottom surface of the convex ring, with a difference of less than 1 mm. This spacing limit allows the third and fourth magnetic rings to be positioned close to the wall of the support ring, providing the necessary magnetic attraction force, enhancing the transmission effect, and enabling the scraper to rotate smoothly; it also prevents the third and fourth magnetic rings from directly contacting the support plate, reducing friction.

[0050] Furthermore, the top outer wall of the support tube is threaded for connecting and installing adapters. The bottom of the valve cores of the exhaust valve and the safety valve are respectively installed on the corresponding adapters. The bottom surface of the adapter slides against the top surface of the gear component to limit and prevent the gear component from disengaging, so that the gear component maintains the transmission engagement with the drive structure, and also keeps the fourth magnetic ring close to the third magnetic ring to achieve the required transmission effect. In addition, the top of the exhaust valve core is equipped with a first valve head, and the top of the safety valve core is equipped with a second valve head. The first valve head can be rotated to open the exhaust valve for manual adjustment of the exhaust action. The safety valve opens directly when the gas pressure inside the pot reaches the preset high pressure range, which plays a role in pressure relief protection. Both are commonly used valve structures in electric pressure cookers and can be purchased and used on the market. Specific details will not be elaborated here.

[0051] Furthermore, such as Figures 4 to 8As shown, the drive structure 600 includes a push assembly 610, a swing linkage 620, and a tension spring 630; a fourth through hole 223 is provided through the support plate 220; a gear part 621 is fixedly provided at one end of the swing linkage 620, the gear part is rotatably mounted on the support plate, and meshes with two gear components 530 for transmission; a push rod 622 is fixedly provided on one side of the gear part 621, the push rod extends towards the fourth through hole and is offset from the center of the fourth through hole; the push assembly 610 includes a cap 611 and a push block 612, the cap 611 is installed on the outer side of the bottom end of the fourth through hole 223; the bottom of the cap is a flexible cover structure, the push block is installed on the inner wall of the bottom of the cap, and the push block 612 is a frustoconical structure; when the gas pressure inside the pot exceeds the upper limit of the safety valve, the push cap and push block move upward, the push block pushes the push rod to deviate from rotation, driving the gear components to rotate, thereby The anti-clogging structure is self-cleaning; a tension spring is installed on the side of the push rod near the push block to provide a return force for the swing linkage; the whole adopts an assembly structure, which facilitates the processing and production of each structural component and the assembly with the inner cover, making the overall production and assembly convenient; the cap can seal the bottom of the fourth perforation and provide a basis for deformation through the flexible cover structure. When the gas pressure inside the pot is high enough, it can lift the cap and the push block inside, and then push the push rod to make the entire swing linkage rotate around the center of the gear part, thereby driving the two gear parts to rotate, which in turn drives the scraper to perform the required scraping and cleaning action. It also exposes the holes of the filter cartridge that were originally in the covered position for venting and depressurization; after depressurization, the push block descends and the cap resets, and the swing linkage resets under the action of the tension spring, driving the scraper to rotate again, which also achieves the scraping and cleaning effect;

[0052] Furthermore, a second circular hole is provided through the center of the gear part; a support column is fixedly provided on the top surface of the support plate, the diameter of the support column is adapted to the diameter of the second circular hole, the gear part is rotatably mounted on the support column, and a first slot is provided on the top side wall of the support column for holding a retaining spring. The retaining spring slides against the top surface of the gear part to prevent the gear part from disengaging; of course, a threaded hole can also be opened on the top surface of the support plate, and a screw with an appropriate diameter can be installed as the rotation fulcrum of the gear part.

[0053] The push rod is equipped with a first bolt to limit one end of the tension spring; the top surface of the support plate is equipped with a second bolt to limit the other end of the tension spring, thereby fixing both ends of the tension spring and providing a reverse movement and reset force for the swing linkage.

[0054] Furthermore, an extension plate is fixedly provided on the push rod, and an arc-shaped hole is provided on the extension plate, which extends along the swing trajectory of the push rod; a third bolt is inserted through the arc-shaped hole, and the bottom end of the third bolt is mounted on the support plate; thereby limiting the swing link at two points, allowing it to rotate and move around the desired swing direction; the swing link is rotatably mounted on the support plate and provides sufficient guiding effect, allowing it to rotate smoothly and maintain the required meshing transmission effect.

[0055] Furthermore, a third protruding tube 250 is fixedly provided on the outer side of the bottom end of the fourth through hole 223, and the outer wall of the third protruding tube is threaded; such as Figure 11 As shown, the cap 611 includes a collar 6111 with threads on its inner wall. The collar 6111 is threadedly installed at the third convex tube 250. A soft rubber cover 6112 is fixedly installed on the bottom surface of the collar 6111. The soft rubber cover has a downwardly convex arc-shaped structure. A support block 6113 is fixedly connected to the recessed part of the bottom inner wall of the soft rubber cover 6112. A guide rod 6114 is fixedly installed on the top surface of the support block 6113. The guide rod extends upward beyond the top surface of the support plate. This design allows the cap to be detachably installed at the third convex tube for easy disassembly and assembly. The bottom surface of the support block matches the shape of the bottom inner wall of the soft rubber cover, which allows the bottom of the soft rubber cover to maintain an outwardly convex shape and also serves as a support for subsequent structural components.

[0056] The support block is provided with a guide rod to provide a connection and installation part for the push block; more specifically, the push block has a second circular hole through it along the axis, the diameter of the second circular hole is adapted to the diameter of the guide rod, the push block 612 is rotatably sleeved on the guide rod 6114, the push block is a rotatable frustum-shaped structure, when it rises, it can slide and engage with the push rod, which can reduce the pushing resistance to a certain extent and allow it to smoothly push the swing link;

[0057] Furthermore, the top inner wall of the cover shell is provided with a first guide hole corresponding to the guide rod. The top end of the guide rod is slidably inserted into the first guide hole to limit the top end of the guide rod, thereby limiting the movement of the support block, which is equivalent to limiting the movement of the push block, so that it can move up and down smoothly and achieve effective pushing of the swing linkage.

[0058] Furthermore, the inner diameter of the third convex tube is larger than the diameter of the fourth perforation; a conical spring 640 is provided inside the soft rubber cover 6112, the maximum outer diameter of the top of the conical spring is adapted to the inner diameter of the third convex tube, and the outer wall of the top of the conical spring abuts against the inner wall of the third convex tube; the top of the conical spring abuts against the bottom surface of the support plate; the outer diameter of the bottom of the conical spring is smaller than the outer diameter of the support block, and the bottom of the conical spring presses against the top surface of the support block; the conical spring is provided to apply force to the support block, so that the soft rubber cover maintains its initial convex state and can withstand the force of normal air pressure, so that it will not be easily triggered; on the other hand, it can provide a reset force after triggering and depressurization, so that the linked parts return to their initial positions without manual adjustment, which is convenient for actual use; among them, multiple buckles are provided on the outer side of the bottom of the fourth perforation, which can be used to clamp and fix the conical spring to prevent the conical spring from deviating or loosening.

[0059] The present invention also discloses an electric pressure cooker, including the aforementioned explosion-proof lid.

[0060] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. An explosion-proof pot lid, comprising a lid shell and an inner lid installed at the bottom of the lid shell; the inner lid includes a frame, the inner wall of which is fixedly provided with a support plate; characterized in that: The support plate has two air holes, and a support tube is fixedly installed at the top of the air holes. An exhaust valve and a safety valve are respectively installed on the two support tubes; the tops of the exhaust valve and the safety valve extend through the cover and outward. The support plate is equipped with an anti-clogging structure at the location corresponding to the two air holes. The anti-clogging structure has a self-cleaning function. A drive structure is installed on the support plate. The drive structure is driven by the high pressure inside the pot and is used to drive the anti-blocking structure to perform self-cleaning action and maintain normal ventilation. The pressure inside the pot is greater than the upper limit pressure of the safety valve; The anti-clogging structure includes an anti-clogging cap and a cleaning component; The anti-clogging cap is installed at the bottom of the air hole; The cleaning components include a scraper cap and a transmission component; The scraper cap is placed on the outside of the anti-clogging cap, and the transmission component is rotated inside the support tube. The bottom end of the transmission component is connected to the scraper cap, so that the scraper cap rotates against the outer wall of the anti-clogging cap. The scraper cap is provided with multiple first perforations arranged in a circular array around the center, and the first perforations extend along the axial direction; The gas inside the pot passes through the first perforation, enters the support tube through the anti-blocking cap, and is discharged to the outside through the corresponding valve body; A first protruding tube is fixedly provided on the outer side of the bottom end of the air hole, and the inner wall of the first protruding tube is threaded. The anti-blocking cap includes a column frame, and a second protruding tube is fixedly provided at the top of the column frame. The outer diameter of the second protruding tube is adapted to the inner diameter of the first protruding tube. The outer wall of the second protruding tube is provided with threads, and the second protruding tube is threadedly connected to the first protruding tube. The bottom sidewall of the column frame is provided with multiple second perforations, and the outer wall of the column frame is fixed with a filter cylinder for blocking the second perforations.

2. The explosion-proof pot lid according to claim 1, characterized in that: The outer diameter of the filter cartridge is adapted to the outer diameter of the first convex tube, and a first circular hole is provided through the middle of the bottom surface of the column frame; The top of the transmission component is equipped with a clamp, the bottom outer diameter of which is adapted to the inner diameter of the support tube. The outer diameter of the clamp is larger than the diameter of the air hole. The bottom of the clamp slides against the outer wall of the upper port of the air hole. The clamp is equipped with a third through hole that penetrates the upper and lower walls. The bottom inner wall of the scraper cap is provided with an insertion tube at the center, and the outer diameter of the insertion tube is adapted to the diameter of the first circular hole; the inner diameter of the scraper cap is adapted to the diameter of the filter cartridge. The bottom of the transmission component is provided with a plug rod, which is inserted into the insertion tube and threadedly connected to it; this allows the scraper cap to rotate tightly against the outer wall of the filter cylinder and the first convex tube.

3. The explosion-proof pot lid according to claim 2, characterized in that: A first magnetic ring is fixedly sleeved on the outside of the card head, and the outer diameter of the first magnetic ring is adapted to the inner diameter of the support tube; A gear component is rotatably sleeved on the outer side of the support tube, and a second magnetic ring is fixedly embedded on the top of the inner ring of the gear component; The gear component is connected to the drive structure for transmission and is driven to rotate by the drive structure.

4. The explosion-proof pot lid according to claim 3, characterized in that: A support ring is fixedly provided on the top outer wall of the scraper cap. The top surface of the support ring is provided with a first groove that forms a closed loop around the center. A third magnetic ring is fixedly embedded in the first groove. The top surface of the support ring slides against the bottom surface of the support plate. The top surface of the support plate is provided with a second groove on the outer side of the bottom of the support tube. The second groove forms a closed loop around the center of the support tube, making this part of the support plate a thin-walled structure. A convex ring is fixedly provided on the bottom surface of the gear component. The outer diameter of the convex ring is adapted to the diameter of the second groove. The convex ring slides against the bottom of the second groove. A fourth magnetic ring is fixedly embedded on the bottom surface of the convex ring. The fourth magnetic ring and the third magnetic ring are magnetically attracted to each other.

5. The explosion-proof pot lid according to claim 4, characterized in that: The drive structure includes a jacking assembly, a swing linkage, and a tension spring; A fourth through hole is provided through the support plate; A gear is fixedly provided at one end of the swing linkage. The gear is rotatably mounted on the support plate and meshes with two gear components for transmission. A push rod is fixedly provided on one side of the gear. The push rod extends toward the fourth through hole and is offset from the center of the fourth through hole. The push assembly includes a cap and a push block. The cap is installed on the outer side of the bottom of the fourth perforation. The bottom of the cap is a flexible cover structure, and the push block is installed on the inner wall of the bottom of the cap. The push block is a frustoconical structure. When the gas pressure inside the pot exceeds the upper limit of the safety valve, the push cap and push block move upward. The push block pushes the push rod off-rotation, causing the gear components to rotate, thereby prompting the anti-clogging structure to perform self-cleaning. A tension spring is installed on the side of the push rod near the push block to provide a restoring force for the swing linkage.

6. The explosion-proof pot lid according to claim 5, characterized in that: A third protruding tube is fixedly provided on the outer side of the bottom end of the fourth perforation, and the outer wall of the third protruding tube is threaded. The cap includes a collar with threads on its inner wall, and the collar is threadedly installed at the third protruding tube. A soft rubber cover is fixedly provided on the bottom surface of the collar. The soft rubber cover has a downward convex arc-shaped cover structure. A support block is fixedly connected to the recessed part of the bottom inner wall of the soft rubber cover. A guide rod is fixedly provided on the top surface of the support block. The guide rod extends upward beyond the top surface of the support plate. The push block has a second circular hole that runs through it along the axis. The diameter of the second circular hole is matched with the diameter of the guide rod. The push block rotates and is sleeved on the guide rod.

7. The explosion-proof pot lid according to claim 6, characterized in that: The inner diameter of the third convex tube is larger than the diameter of the fourth perforation. The soft rubber cover has a conical spring inside. The maximum outer diameter of the top of the conical spring is matched with the inner diameter of the third convex tube. The outer wall of the top of the conical spring abuts against the inner wall of the third convex tube. The top of the conical spring abuts against the bottom surface of the support plate. The outer diameter of the bottom end of the conical spring is smaller than the outer diameter of the support block, and the bottom end of the conical spring presses against the top surface of the support block.

8. An electric pressure cooker, characterized in that: Includes an explosion-proof pot lid as described in any one of claims 1 to 7.

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