A new type of electric pressure cooker

Abstract

This application discloses a novel electric pressure cooker that uses a rigid transmission method to directly drive the lifting of the steam vent cap via an electronic pressure relief structure. This avoids the risk of magnetic attenuation at high temperatures associated with traditional electromagnetic drives, ensuring the reliability of pressure control during cooking. A noise-reducing structure completely covers the steam vent cap and guides steam to disperse and escape through the vent holes, reducing steam noise at the source. Furthermore, an innovative rotary multi-steam vent cap selection mechanism with a segmented steam vent structure is adopted. By directly lifting different numbers of steam vent caps, it replaces the traditional height adjustment mode, fundamentally eliminating the problem of segmented steam vent failure caused by parts processing / assembly errors, and achieving low-cost, integrated, efficient, and quiet steam vent control.

Description

Technical Field

[0001] This utility model belongs to the field of electric pressure cooker technology, and in particular relates to a novel electric pressure cooker. Background Technology

[0002] Currently, commercially available electric pressure cookers generally suffer from three major technical defects: First, they generally use electromagnetic structures to achieve automatic steam release control. For example, the valve is opened to release steam by using the magnetic force generated by the energization of the electromagnetic coil to overcome the attraction force of the permanent magnet (or the spring force). After the power is cut off, the valve is reset and closed by the attraction force of the permanent magnet (or the spring force). However, this solution has significant defects under high temperature and high pressure conditions: the thermal stability of the electromagnetic device is poor. When the temperature inside the pot continues to rise, the magnetism of the electromagnet will decay, resulting in a decrease in driving force. These physical defects reduce the reliability of the exhaust action—specifically manifested as unstable opening amplitude of the exhaust valve, delayed closing response, and even unexpected opening and closing phenomena; secondly, excessive noise during the pressure relief process affects the user experience; thirdly, the control of different exhaust volumes is achieved by adjusting the opening height of a single exhaust cap during the exhaust process, which is extremely sensitive to the machining accuracy and assembly errors of the height adjustment mechanism, easily leading to inaccurate trigger height positions and thus causing the segmented exhaust function to fail or insufficient exhaust; existing solutions mostly address single problems with localized improvements, and their complex structures result in high costs, with no low-cost integrated solution yet available that can simultaneously solve automatic exhaust, noise reduction control, and segmented pressure relief. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] In order to overcome the above shortcomings, the purpose of this utility model is to provide a new type of electric pressure cooker to solve the three major technical defects of current electric pressure cookers: electromagnetic drive high temperature failure leading to uncontrolled steam exhaust, excessive steam exhaust noise, and segmented pressure exhaust relying on the height adjustment mechanism of a single steam exhaust cap (which is easily affected by processing / assembly errors and can be triggered inaccurately).

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] A novel electric pressure cooker includes: a pot body, an inner pot disposed within the pot body, and a lid assembly fitted onto the pot body. The lid assembly has an inner liner and an outer cover, with an installation cavity formed between the inner liner and the outer cover; multiple vent pipes penetrating the inner liner and the outer cover to connect the inner pot to the outside; multiple vent caps respectively covering the corresponding vent pipes; a noise reduction structure covering the outside of the multiple vent caps and having vent holes for guiding and dispersing steam outwards; an electronic pressure relief structure disposed within the pot and having its driving end extending into the installation cavity and linked to one of the vent caps, the electronic pressure relief structure being electrically driven to lift the linked vent caps in response to predetermined conditions during cooking to vent steam and maintain a predetermined pressure inside the inner pot; and a segmented venting structure with one end rotatably pivotally connected to the top of the outer cover and its operating end extending into the installation cavity and linked to the multiple vent caps, the segmented venting structure being able to selectively lift one or more vent caps by rotation after cooking to vent steam.

[0008] This invention utilizes a rigid transmission method that directly drives the lifting of the vent cap via an electronic pressure relief structure, avoiding the risk of magnetic attenuation at high temperatures associated with traditional electromagnetic drives and ensuring the reliability of gas pressure control during cooking. A noise-reducing structure completely covers the vent cap and guides steam through the vent holes for dispersion, reducing vent noise at its source. Furthermore, it innovatively employs a rotating multi-vent cap selection mechanism with a segmented vent structure, directly lifting different numbers of vent caps to replace the traditional height adjustment mode. This fundamentally eliminates the problem of segmented vent failure caused by parts processing / assembly errors, achieving low-cost, integrated, efficient, and quiet vent control.

[0009] In some embodiments, the noise reduction structure includes: a noise reduction seat with openings at both the top and bottom ends and a noise reduction cover that can be opened and closed and disposed above the noise reduction seat. The noise reduction seat and the noise reduction cover cover each other to form a receiving cavity covering the exhaust cap. The exhaust hole is opened on the noise reduction cover, and the inner sidewall of the noise reduction cover protrudes towards the receiving cavity corresponding to the position of the exhaust cap to form a return wall.

[0010] The enclosed cavity formed by the noise reduction seat and the noise reduction cover completely covers the pressure vent cap in the closed space, forming a physical barrier layer to directly reduce noise transmission; at the same time, the return wall forces the steam to swirl downwards to counteract the impact, reducing the steam velocity and impact energy before it is discharged outwards through the vent hole. The dual effect reduces high-frequency impact noise by more than 40%, and the compact integrated structure avoids the volume defects of traditional screw-on devices.

[0011] In some embodiments, a hinge shaft is provided on one edge of the noise reduction cover, which is rotatably connected to a shaft hole opened on the noise reduction seat. The noise reduction seat has an outward protrusion on the edge of the shaft hole to form a fastening part, and the edge of the noise reduction cover corresponding to the fastening part is provided with a fastening groove that fastens to the fastening part.

[0012] This embodiment uses a mechanical interlocking design between the fastening part and the fastening groove to form a rigid constraint when the noise-reducing lid is closed. It is not easy to come loose even under the impact of high steam pressure, completely eliminating the risk of the lid popping open due to vibration and loosening caused by traditional screw fasteners. Its self-locking structure automatically fastens when the noise-reducing lid is pressed down, and it can only be unlocked by manually lifting it to a specific position, thus ensuring cooking safety from the source.

[0013] In some embodiments, the vent cap is located above the outer cover; it also includes: an elastic sealing gasket disposed between the lower opening of the noise reduction seat and the inner liner cover; wherein, the elastic sealing gasket is vertically provided with a push post located at the bottom of the vent cap and penetrating the inner liner cover.

[0014] The elastic sealing gasket achieves a dual function: on the one hand, it effectively seals the gap between the noise reduction structure and the pot lid assembly, preventing steam leakage and assisting in noise reduction; on the other hand, it creates a direct force transmission channel (the push column penetrates the inner liner cover), allowing the vent cap located above the outer cover to be indirectly and reliably lifted by the operating end of the electronic pressure relief structure or segmented vent structure in the installation cavity through the push column for venting. After venting, the elastic sealing gasket's own elasticity can accurately and quickly drive the push column to reset and seal, and the vent cap automatically descends under gravity, significantly optimizing the reliability and reset accuracy of the venting action. At the same time, it simplifies the transmission structure layout, reduces assembly difficulty, and improves the maintainability of the equipment.

[0015] In some embodiments, the electronic pressure relief structure includes: a lever hinged to the inner liner cover, the first end of which corresponds to the bottom of the vent cap, and the second end which extends vertically downward and forms an inclined sliding mating surface at its end; a connecting rod that is movably disposed on the inner liner cover and located below the lever, the upper end of which corresponds to the sliding mating surface; a top rod bracket disposed inside the pot body and corresponding to the lower end of the connecting rod; a motor disposed on the top rod bracket; and a top rod assembly that is threadedly engaged with the motor drive shaft and slidably engaged with the top rod bracket; when the top rod assembly is driven to move upward along the top rod bracket and extend out of the pot body, it pushes the connecting rod to press the sliding mating surface, causing the lever to swing around the hinge point to lift the vent cap for venting.

[0016] This embodiment replaces electromagnetic drive with motor-screw mechanical transmission, fundamentally solving the problem of reduced driving force caused by thermal decay of the electromagnet under high-temperature conditions, ensuring the stability and reliability of the steam exhaust valve's opening and closing action; at the same time, the threaded push rod assembly can achieve precise displacement control, avoiding unexpected opening and closing phenomena, significantly improving the pressure control accuracy inside the boiler, and reducing steam leakage and energy waste.

[0017] In some embodiments, a guide groove is provided in the middle of the top rod bracket into which the motor drive shaft extends;

[0018] The push rod assembly includes: a slider that is threaded to the drive shaft and adapted to the shape of the guide groove, and a push rod that is sleeved on the drive shaft and connected to the slider.

[0019] The guide groove design forces the push rod assembly to move in a straight line, completely avoiding movement trajectory deviation caused by assembly errors or vibration, and ensuring effective contact between the sliding surfaces of the connecting rod and the lever. This structure not only improves transmission efficiency but also reduces wear on parts, extends the life of the device, and reduces dependence on assembly precision, thereby improving production yield.

[0020] In some embodiments, the device further includes a lever spring, which is laterally disposed between the inner liner and the second end of the lever, with its two ends respectively fixed to the inner liner and the lever.

[0021] After the exhaust is completed, the active traction lever resets, making up for the insufficiency of gravity reset, significantly improving the valve closing response speed and sealing performance, completely solving the problem of continuous steam leakage caused by the closing delay of the traditional electromagnetic structure, and further reducing energy consumption.

[0022] In some embodiments, the exhaust cap includes a first exhaust cap and a second exhaust cap. The segmented exhaust structure includes a segmented knob, a toggle member connected below the segmented knob and rotating synchronously therewith, and a first and second levers oscillatingly mounted below the toggle member. The first and second levers are spaced apart along the rotation direction of the toggle member, and each lever has a first end close to the toggle member and corresponding to the movement trajectory of the toggle member, and a second end away from the toggle member and corresponding to the first and second exhaust caps, respectively. When the toggle member rotates, it selectively squeezes: only the first end of the first lever causes its second end to swing upward to lift the first exhaust cap, or simultaneously squeezes the first ends of the first and second levers to cause both the first and second levers to swing upward synchronously to lift the first and second exhaust caps.

[0023] By incorporating a dual-lever structure and the rotation path of the actuating component, selective lifting of one or more different exhaust caps is achieved. This transforms the original function, which relied on a single component for height adjustment, into a hierarchical control method completed collaboratively by multiple components, significantly enhancing the structure's process tolerance and operational stability. Furthermore, this structure improves user convenience and feedback, making switching between different exhaust modes more intuitive and reliable. It fundamentally addresses common defects in existing technologies, such as exhaust failure and poor exhaust performance, demonstrating significant technological advancement and practical value.

[0024] In some embodiments, it further includes: two pins disposed on the inner liner and respectively corresponding to the first and second lifting rods, and the bottom surfaces of the first and second lifting rods are provided with arc-shaped grooves that are sleeved on the pins and rotate about their axial direction.

[0025] By introducing a limiting structure with a pin and an arc-shaped groove, this embodiment significantly improves the stability and repeatability of the lever action, reducing the risk of operational failure due to component wobbling or misalignment. Simultaneously, this structure also possesses good assembly adaptability, reducing process requirements during manufacturing and further enhancing product consistency and durability.

[0026] In some embodiments, the actuator has a radially extending cam portion, and the first ends of the first and second levers are provided with protrusions that match the profile of the cam portion.

[0027] The use of a matching structure of cam and protrusion surface makes the push of the lever by the actuating component smoother and more controllable, improving the response sensitivity and action consistency during the opening of the vent cap. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the novel electric pressure cooker of this utility model;

[0029] Figure 2 This is an exploded view of the novel electric pressure cooker of this utility model;

[0030] Figure 3 This is a state diagram of the default noise reduction structure of the novel electric pressure cooker of this utility model;

[0031] Figure 4 This is an assembly diagram of the noise reduction structure of the new type of electric pressure cooker with a default noise reduction cover;

[0032] Figure 5 This is a first-view structural schematic diagram of the noise reduction structure in the novel electric pressure cooker of this utility model;

[0033] Figure 6 This is a second-view structural schematic diagram of the noise reduction structure in the novel electric pressure cooker of this utility model;

[0034] Figure 7 This is a third-view structural schematic diagram of the noise reduction structure in the novel electric pressure cooker of this utility model;

[0035] Figure 8 This is a diagram showing the steam flow state of the novel electric pressure cooker after the noise reduction structure is installed.

[0036] Figure 9 yes Figure 8 A magnified view of part I in the middle;

[0037] Figure 10 This is an assembly diagram of the electronic pressure relief structure for the novel electric pressure cooker of this utility model;

[0038] Figure 11 yes Figure 10 A magnified view of a section II;

[0039] Figure 12 This is a cross-sectional view of the pot body in the novel electric pressure cooker of this utility model;

[0040] Figure 13 yes Figure 12 A magnified view of a section III;

[0041] Figure 14 This is a schematic diagram of the electronic pressure relief structure in the novel electric pressure cooker of this utility model;

[0042] Figure 15 This is an exploded view of the electronic pressure relief structure in the novel electric pressure cooker of this utility model;

[0043] Figure 16 This is an assembly diagram of the push rod bracket and motor in the electronic pressure distribution structure;

[0044] Figure 17 This is a cross-sectional view of the push rod support, motor, and push rod assembly assembled in the electronic pressure distribution structure.

[0045] Figure 18 This is a schematic diagram of the lever in the electronic pressure distribution structure;

[0046] Figure 19 This is a schematic diagram of the connecting rod in the electronic pressure distribution structure;

[0047] Figure 20 This is an assembly diagram of the segmented steam exhaust structure for the novel electric pressure cooker of this utility model;

[0048] Figure 21 This is a cross-sectional view of the novel electric pressure cooker of this utility model after the segmented steam exhaust structure has been installed;

[0049] Figure 22 This is a schematic diagram of the segmented exhaust structure of this utility model;

[0050] Figure 23 This is an assembly diagram of the segmented knob and toggle component in the segmented exhaust structure of this utility model;

[0051] Figure 24 This is a schematic diagram of the actuating component in the segmented exhaust structure of this utility model;

[0052] Figure 25 This is an assembly diagram of the first lifting rod and the pin in the segmented exhaust structure of this utility model.

[0053] Figure label:

[0054] 1. Pot body; 2. Inner pot; 3. Pot lid assembly; 301. Inner liner cover; 3011. Hinge mounting base; 3012. Limiting seat; 302. Outer cover; 3021. Slot; 4. Noise reduction structure; 401. Noise reduction cover; 4011. Reflux wall; 4012. Exhaust vent; 402. Noise reduction seat; 4021. Locking block; 5. Electronic pressure relief structure; 501. Lever; 5011. Rotating shaft; 5012. Inclined sliding mating surface; 502. Connecting rod; 5021. Rectangular head; 5022. Rod part; 503. Top rod assembly; 5031. Slider; 5032. Top rod; 504. Top rod bracket; 504 1. Guide groove; 505. Motor; 5051. Drive shaft; 506. Elastic sealing cover; 507. Toggle spring; 6. Segmented exhaust structure; 601. Segmented knob; 602. Actuating element; 6021. Cam part; 6022. Limiting part; 603. First lifting rod; 6031. First end; 60311. Raised surface; 6032. Second end; 6033. Arc-shaped groove; 604. Pin; 605. Second lifting rod; 7. First exhaust cap; 8. Second exhaust cap; 9. Exhaust pipe; 10. Handle; 1001. Gear position indicator; 11. Pressure gauge; 12. Elastic sealing gasket; 1201. Push column. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0056] Please see Figure 1-3This utility model provides a novel electric pressure cooker, the core of which includes: a pot body 1, an inner pot 2, and a lid assembly 3. Specifically, the pot body 1 can be made of food-grade stainless steel, and the inner pot 2 is nested inside the pot body 1; the lid assembly 3 is connected to the pot body 1 by a rotating buckle, and this assembly is further divided into an inner liner cover 301 and an outer cover 302, which are spaced about 8mm apart to form an annular mounting cavity. It is worth noting that two steam vent pipes 9 with a diameter of about 6mm are installed through the mounting cavity to connect the inner pot 2 to the outside; each steam vent pipe 9 is covered with a steam vent cap (first steam vent cap 7 and second steam vent cap 8), the lower end of which can extend into the mounting cavity or be located above the outer cover 302. Furthermore, a noise reduction structure 4 is provided on the outside of all steam vent caps, and this structure has a cover with multiple steam vent holes 4012 to guide the steam to disperse and be discharged. The key feature is that the pot body 1 is equipped with an electronic pressure relief structure 5, whose drive end extends through the pot body 1 to the mounting cavity and is mechanically linked to one of the vent caps. This structure responds to the pressure data inside the pot during cooking (e.g., when the pressure is ≥70kPa), and electrically drives the corresponding vent cap to release steam to maintain the predetermined pressure. In addition, the top of the outer cover 302 is pivotally connected to a segmented venting structure 6, whose operating end extends into the mounting cavity to link all the vent caps. By rotating this structure, it is possible to select to raise only a single vent cap for slow steam release, or to raise multiple caps simultaneously for rapid steam release.

[0057] The noise reduction structure 4, the electronic pressure relief structure 5, and the segmented exhaust structure 6 will be described in detail below:

[0058] Please see Figure 1-9 The noise reduction structure 4 includes a noise reduction seat 402 and a noise reduction cover 401. The noise reduction seat 402 is a hollow cylinder that runs vertically through the body. It is preferably made of high-temperature resistant engineering plastic (such as PPSU or Nylon 66) through injection molding, and its bottom edge is fixed to the pressure cooker lid assembly 3 by a snap-fit ​​structure. The noise reduction cover 401 can be opened and closed to cover the top of the noise reduction seat 402 through a hinge mechanism. When the two are closed, they form a sealed cavity that completely covers the pressure cooker vent cap (sleeved on the vent pipe 9). In particular, the top of the noise reduction cover 401 has a vent hole 4012 for steam discharge, and its inner sidewall protrudes inward to form a return wall 4011 opposite to the vent cap. In this way, the steam is first forced to change its flow direction by the return wall 4011 (turning back 180°). This return flow collides with the continuously rising new steam to form a vortex, which directly reduces the airflow velocity. The decelerated steam is then discharged outward through the vent hole 4012, effectively attenuating high-frequency noise.

[0059] Furthermore, the axial direction of the vent hole 4012 is strictly perpendicular to the extension direction of the return wall 4011. In a preferred embodiment, the vertical arrangement causes the steam jet direction to orthogonally interfere with the vortex motion generated by the return wall 4011, meaning the decelerated steam then undergoes a 90° orthogonal turn before exiting through the vertical vent hole 4012. This design disperses residual vortices, eliminates high-frequency whistling sounds, and avoids condensate splashing caused by direct steam injection.

[0060] A predetermined gap is formed between the reflux wall 4011 and the vent cap to allow steam flow. Furthermore, the reflux wall 4011 is designed as an annular ridge that matches the outer contour of the pressure cooker's vent cap, forming a tightly encircling steam congestion channel. This achieves 360° circumferential noise reduction, eliminates localized airflow dead zones, and improves noise attenuation stability by more than 30%.

[0061] Preferably, multiple exhaust holes 4012 are arranged side-by-side in a straight line. A typical embodiment uses four circular holes of the same diameter, with the spacing between the holes controlled within 1.5 times the diameter. The multi-hole layout disperses the high-pressure steam flow into multiple low-pressure airflows, and combined with the counteracting effect of the return wall 4011, forms a two-stage noise reduction mechanism, reducing the impact energy of a single airflow by 60%.

[0062] It is worth noting that the noise reduction cover 401 has a cylindrical hinge shaft integrally formed on one side edge, with a diameter of approximately 3mm. Correspondingly, the noise reduction base 402 has a U-shaped shaft hole 201 on its side wall, into which the hinge shaft can be rotatably inserted to form a rotating pair. This design allows the user to flip the noise reduction cover 401 upwards with one hand to fully expose the exhaust cap for cleaning without disassembling the entire device.

[0063] Furthermore, a fastening part is provided on the edge of the noise reduction seat 402 away from the hinge axis. A corresponding elastic fastening groove 103 is provided on the noise reduction cover 401. When the noise reduction cover 401 is pressed down, the fastening groove 103 and the fastening part are mechanically interlocked, and the noise reduction cover 401 must be manually lifted to release the lock. This completely eliminates the possibility of accidental opening caused by steam pressure.

[0064] Specifically, a locking block 4021 extends horizontally from the bottom edge of the noise reduction seat 402. The locking block 4021 is about 2mm thick and can be pressed into the slot 3021 of the outer cover 302 of the pressure cooker by hand to achieve positioning.

[0065] Specifically, the vent cap can extend into the mounting cavity or be located above the outer cover 302. For the embodiment where the vent cap is located above the outer cover 302, to ensure that the noise reduction structure 4 (noise reduction seat 402) can stably cover the vent cap for sound insulation while also allowing for easy control of the vent cap's lifting, a flexible sealing gasket 12 is provided between the bottom opening of the noise reduction seat 402 and the upper surface of the outer cover 302 (where the mounting groove is formed). After the noise reduction seat 402 engages with the upper surface of the outer cover 302, it can press the sealing gasket 12 tightly. The sealing gasket 12 is provided with multiple push-up posts 1201. The top of each push-up post 1201 corresponds precisely to the bottom of the vent cap, and extends downwards into the space inside the pot lid (mounting cavity). The advantage of this design is that when steam needs to be released from the pot, whether it's the automatically controlled electronic pressure release structure 5 or the manually operated segmented steam release switch 6 (both are located inside the pot lid), simply pushing the pusher column 1201 upwards will lift the steam release cap, allowing steam to escape. After the steam is released, the pushing force disappears, and the elastic sealing gasket 12 will automatically contract and return to its original shape, resealing the opening of the steam release pipe 9. Simultaneously, this elastic gasket 12 also seals the gap between the bottom outer layer cover 302 of the noise reduction seat 402, preventing steam leakage and providing better sound insulation.

[0066] Please see Figure 10-19The electronic pressure relief structure 5 includes: a lever 501, a connecting rod 502, a push rod bracket 504, a motor 505, and a push rod assembly 503. Specifically, the inner liner 301 has a hinged mounting base 3011 on its side, and the lever 501 forms a pivot 5011 on both sides that is hinged to the hinged mounting base 3011. The first end of the lever 501 extends to the bottom of the vent cap mounted on the inner liner 301 and maintains a gap of about 1-3 mm therewith, while the second end extends vertically downward and the end is machined into a sliding mating surface 5012 with a 45° inclination. Furthermore, a vertically movable connecting rod 502 is provided directly below the lever 501. A limiting seat 3012 and a guide hole adapted to the shape of the connecting rod 502 are provided on the inner liner cover 301. The upper end of the connecting rod 502 corresponds to the inclined sliding mating surface 5012 of the lever 501, and the lower end extends downward through the guide hole. The connecting rod 502 can move up and down along the guide hole. When it moves to the lower position, it is limited by the limiting seat 3012 to prevent it from rotating. A top rod bracket 504 is fixedly installed below the connecting rod 502. The top rod bracket 504 is installed inside the pot body 1. A through hole is provided on the pot body 1 corresponding to the position of the top rod bracket 504. A micro stepper motor 505 (power 5-10W) is vertically installed on the top rod bracket 504. Specifically, the push rod assembly 503 consists of a slider 5031 and a push rod 5032. The slider 5031 is threadedly connected to the drive shaft 5051 of the motor 505, while the push rod 5032 is sleeved on the drive shaft 5051 and rigidly connected to the slider 5031. When the motor 505 rotates forward, the push rod assembly 503 moves upward along the push rod bracket 504, pushing the connecting rod 502 to press the inclined sliding surface 5012 of the lever 501, forcing the lever 501 to swing clockwise around the hinge point, thereby lifting the vent cap to release steam. When the motor 505 rotates in reverse, the push rod assembly 503 moves downward and no longer contacts the inclined sliding surface 5012. The first end of the lever 501 swings downward counterclockwise under the action of gravity, disengaging from the vent cap. The vent cap moves downward and seals the vent pipe 9 again.

[0067] Specifically, motor 505 is connected to the control circuit board. The start, stop, forward and reverse rotation of motor 505 are all controlled by the program on the main control board, and the pressure cooker can realize the automatic steam release function.

[0068] Specifically, a rectangular guide groove 5041 (0.5mm wider than the slider 5031) is formed in the middle of the push rod bracket 504, and this groove runs through the upper and lower surfaces of the bracket. Furthermore, the motor drive shaft 5051 passes through the bottom of the groove and is threadedly connected to the slider 5031. In this way, the guide groove 5041 not only restricts the movement trajectory of the push rod assembly 503 to a purely linear motion, but also avoids radial offset caused by vibration.

[0069] For the push rod assembly 503, its slider 5031 is made of nylon to reduce the coefficient of friction, and has an embedded brass threaded sleeve that mates with the motor drive shaft 5051. The push rod 5032 has a cylindrical structure with a blind hole inside, fitting onto the upper part of the drive shaft 5051, and its top plane is in contact with the lower end face of the connecting rod 502. Specifically, the slider 5031 and the push rod 5032 can move synchronously via a pin or welding; this design ensures efficient transmission of driving force and avoids relative rotation.

[0070] Preferably, this application adds a lever spring 507 to optimize the reset performance. Specifically, the spring is arranged laterally between the inner wall of the inner liner 301 and the second end of the lever 501. It is a stainless steel compression spring with a wire diameter of 0.8mm, one end of which is fixed to the slot or post of the inner liner 301, and the other end abuts against the protrusion on the side of the lever 501. When the push rod 5032 moves upward to press the inclined sliding surface 5012, the lever 501 swings clockwise and compresses the lever spring 507. When the exhaust ends and the push rod 5032 moves downward, the lever spring 507 drives the lever 501 to quickly reset counterclockwise under its own elastic force, shortening the exhaust cap closing response time to within 0.5 seconds (3 times better than the traditional electromagnetic structure). It is worth noting that a torsion spring can also be used instead of the compression spring, which is installed at the hinge shaft of the lever 501 to achieve the same function.

[0071] Specifically, the upper end of the connecting rod 502 is a rectangular head 5021, which contacts the inclined sliding surface 5012 of the lever 501 to distribute stress; the lower end is a cylindrical rod portion 5022, which vertically penetrates the guide hole of the inner liner 301. Preferably, the surface of the rod portion 5022 is chrome-plated to reduce friction, while a polytetrafluoroethylene bushing is embedded in the guide hole to ensure smooth movement. In this way, the connecting rod 502 always maintains a vertical direction when moving up and down, avoiding jamming caused by lateral deviation. At the same time, a lever spring 507 with appropriate elasticity is selected to avoid excessive elasticity of the lever spring 507, which could cause the connecting rod 502 to shift laterally and jam.

[0072] Preferably, an elastic sealing cover 506 (made of silicone, 2mm thick) is added to the upper end of the top rod bracket 504. The sealing cover has a bowl-shaped structure, and its edge is fixed to the upper end face of the bracket by an interference fit. When the top rod 5032 moves up and down, the pleated area of ​​the elastic sealing cover 506 undergoes elastic deformation, and is pushed upward by the top of the top rod 5032, pushing the connecting rod 502 to move upward, or it returns to its original position under its own elastic force after the top rod 5032 moves down. The elastic sealing cover 506 effectively prevents high-temperature steam from entering the motor 505 cavity.

[0073] Specifically, the exhaust caps include: the first row of exhaust caps 7 and the second row of exhaust caps 8.

[0074] Please see Figure 20-25The segmented steam venting structure 6 includes a segmented knob 601, a toggle element 602, and a double-lever assembly. Specifically, a handle 10 is provided on the top of the pressure cooker lid assembly 3. The handle 10 serves as a basic support structure, and the segmented knob 601 is installed through an opening on its top. This knob is fixedly connected to the toggle element 602 below via a central pivot, thereby achieving synchronous rotation. Further, a first lever 603 and a second lever 605 are oscillatingly installed below the toggle element 602, and the two are spaced apart along the rotation direction of the toggle element 602. It is worth noting that each lever has a first end 6031 and a second end 6032: the first end 6031 is adjacent to the toggle element 602 and overlaps with its movement trajectory, while the second end 6032 corresponds to the bottom of the first steam vent cap 7 and the second steam vent cap 8, respectively. A gear position indicator 1001 is provided on the upper surface of the handle 10. When the user rotates the segment knob 601 to the corresponding gear position, the actuating element 602 selectively compresses the levers. For example, when the actuating element 602 is rotated to the first gear position, the actuating element 602 does not contact the first end 6031 of the first lever 603 and the second lever 605, and both the first row of steam caps 7 and the second row of steam caps 8 are in the closed state. When the segment knob 601 is rotated to the second gear position, the actuating element 602 only compresses the first end 6031 of the first lever 603, causing its second end 6032 to rise and open the first row of steam caps 7. When rotating further to the third gear position, the first ends 6031 of both levers are compressed simultaneously, causing both rows of steam caps to open synchronously. In this way, mechanical graded control replaces the traditional single-lever height adjustment, significantly improving operational stability.

[0075] Specifically, the first row of steam caps 7 and the second row of steam caps 8 have the same structure. They are both fitted onto the steam vent pipe 9 of the pressure cooker. Initially, they both block the steam vent of the steam vent pipe 9. When the first lever 603 or the second lever 605 moves the first row of steam caps 7 and the second row of steam caps 8 upward to open the steam vent of the steam vent pipe 9, the steam from the pressure cooker can be discharged outward.

[0076] Specifically, this application provides two pins 604, which are fixed to the upper surface of the inner liner 301 by a mounting base. An arc-shaped groove 6033 is provided on the bottom surface of the first lever 603 and the second lever 605. The width of the groove is slightly larger than the diameter of the pin 604 (about 0.5 mm gap), so that the arc-shaped groove 6033 can fit into the pin 604 and the first lever 603 and the second lever 605 can swing around the pin 604 to lift the first row of gas caps 7 or the second row of gas caps 8 to open.

[0077] Furthermore, a radially extending cam portion 6021 is integrally formed at the bottom of the limiting member 602. Correspondingly, the first ends 6031 of the first lever 603 and the second lever 605 are stamped to form a protruding surface 60311 that matches the cam profile. When the cam portion 6021 rotates and contacts the protruding surface 60311, a smooth downward pressure is achieved through a continuous curved surface transition, avoiding the impact noise generated by traditional right-angle contact.

[0078] The configuration of the protruding surface 60311 is specially optimized: the aforementioned protruding surface 60311 is machined into a wedge-shaped structure, and its inclined angle is controlled between 15° and 30°. Preferably, a 20° inclined angle design is adopted. In this way, when the cam part 6021 slides over the protruding surface 60311, the inclined surface generates a guiding force, which reduces the swing resistance of the boom by about 40% and reduces the wear of the cam part 6021.

[0079] Based on this, this application adds a radially extending limiting part 6022 to the edge of the actuating member 602 opposite to the edge of the cam part 6021, and symmetrically screws two limiting posts onto the inner liner 301 of the pressure cooker. Specifically, when the cam part 6021 contacts the first limiting post, the cam part 6021 does not contact the protruding surfaces 60311 of the first lever 603 and the second lever 605. When the actuating member 602 rotates counterclockwise to move the cam part 6021 away from the first limiting post and the limiting part 6022 does not contact the second limiting post, the cam part 6021 only contacts the protruding surface 60311 of the first lever 603. When the actuating member 602 rotates counterclockwise again and the limiting part 6022 contacts the second limiting post, the cam part 6021 simultaneously presses against the protruding surfaces 60311 of both levers. In this way, the precise switching of the three exhaust states is ensured by mechanical hard limiting, and the user can clearly feel the gear shifting during operation.

[0080] Furthermore, the pot body 1 integrates an electrical control system: a control circuit board is located in the pot body 1, connected via wires to a temperature sensor (bottom of the inner pot 2) and a pressure sensor (located in the mounting cavity and connected to the inner pot 2 via a through hole). The sensors monitor data in real time and transmit it to the main control chip (preferably an ARM Cortex-M series). When the pressure exceeds a preset threshold, the chip outputs a signal to drive the motor 505 of the electronic pressure relief structure 5. In addition, a digital pressure gauge 11 is embedded in the outer cover 302, displaying the pressure value inside the pot in real time (range 0-100 kPa).

[0081] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A novel electric pressure cooker, characterized in that, include: The vessel comprises a pot body (1), an inner pot (2) disposed within the pot body (1), and a lid assembly (3) covering the pot body (1). The lid assembly (3) has an inner liner (301) and an outer cover (302), forming an installation cavity between the inner liner (301) and the outer cover (302). Multiple vent pipes (9) pass through the inner liner (301) and the outer cover (302) to connect the inner pot (2) to the outside. Each vent pipe is respectively installed on its corresponding vent. Multiple steam vent caps on the steam pipe (9); a noise reduction structure (4) covering the outside of the multiple steam vent caps and having a steam vent hole (4012) for guiding and dispersing steam and discharging it outward; an electronic pressure relief structure (5) disposed inside the pot body (1) and having its drive end extending to the mounting cavity and linked with one of the steam vent caps, the electronic pressure relief structure (5) responding to predetermined conditions during the cooking process by electrically driving the linked steam vent cap to discharge steam in order to maintain a predetermined gas pressure inside the inner pot (2); And a segmented venting structure (6) with one end rotatably pivotally connected to the top of the outer cover (302) and the operating end extending into the mounting cavity and linked with the plurality of vent caps, the segmented venting structure (6) being able to selectively lift one or more vent caps by rotation after cooking to vent steam.

2. The new electric pressure cooker according to claim 1, characterized in that, The noise reduction structure (4) includes: a noise reduction seat (402) with openings at both the top and bottom ends, and a noise reduction cover (401) that can be opened and closed and disposed above the noise reduction seat (402). The noise reduction seat (402) and the noise reduction cover (401) cover each other to form a receiving cavity covering the exhaust cap. The exhaust hole (4012) is opened on the noise reduction cover (401), and the inner side wall of the noise reduction cover (401) protrudes towards the receiving cavity corresponding to the position of the exhaust cap to form a return wall (4011).

3. The new electric pressure cooker according to claim 2, characterized in that, A hinge shaft is provided on one side edge of the noise reduction cover (401) and is rotatably connected to the shaft hole opened on the noise reduction seat (402). The noise reduction seat (402) has an outward protrusion on the edge of the shaft hole to form a fastening part. The edge of the noise reduction cover (401) corresponding to the fastening part is provided with a fastening groove that fastens to the fastening part.

4. The new electric pressure cooker according to claim 2, characterized in that, The vent cap is located above the outer cover (302); it also includes: an elastic sealing gasket (12) disposed between the lower opening of the noise reduction seat (402) and the inner liner cover (301); wherein, the elastic sealing gasket (12) is vertically provided with a push post (1201) located at the bottom of the vent cap and penetrating the inner liner cover (301).

5. The new electric pressure cooker according to claim 1, characterized in that, The electronic pressure relief structure (5) includes: a lever (501) hinged to the inner liner cover (301), the first end of which corresponds to the bottom of the vent cap, and the second end which extends vertically downward and forms an inclined sliding mating surface (5012); a connecting rod (502) movably mounted on the inner liner cover (301) and located below the lever (501), the upper end of which corresponds to the sliding mating surface (5012); and a top rod support located inside the pot body (1) and corresponding to the lower end of the connecting rod (502). The frame (504) includes a motor (505) mounted on the top rod support (504); a top rod assembly (503) threadedly engaged with the drive shaft (5051) of the motor (505) and slidably engaged with the top rod support (504); when the top rod assembly (503) is driven to move upward along the top rod support (504) and extend out of the pot body (1), it pushes the connecting rod (502) to press the sliding mating surface (5012), causing the lever (501) to swing around the hinge point to lift the vent cap for venting steam.

6. The new electric pressure cooker according to claim 5, characterized in that, The top rod support (504) has a guide groove (5041) in the middle into which the drive shaft (5051) of the power supply (505) extends; The push rod assembly (503) includes: a slider (5031) that is threaded to the drive shaft (5051) and adapted to the shape of the guide groove (5041), and a push rod (5032) that is sleeved on the drive shaft (5051) and connected to the slider (5031).

7. The novel electric pressure cooker according to claim 5 or 6, characterized in that, Also includes: A lever spring (507) is laterally positioned between the inner liner (301) and the second end of the lever (501), with the inner liner (301) and the lever (501) respectively fixed at both ends.

8. The novel electric pressure cooker according to claim 1, characterized in that, The exhaust cap includes: a first exhaust cap (7) and a second exhaust cap (8); The segmented exhaust structure (6) includes: a segmented knob (601), an actuating element (602) connected below the segmented knob (601) and rotating synchronously therewith, and a first lever (603) and a second lever (605) oscillatingly mounted below the actuating element (602). The first lever (603) and the second lever (605) are spaced apart along the rotation direction of the actuating element (602), and each lever has a first end (6031) close to the actuating element (602) and corresponding to the movement trajectory of the actuating element (602), and a second end away from the actuating element (602). The second end (6032) corresponding to the first row of steam caps (7) and the second row of steam caps (8) respectively; wherein, when the actuating member (602) rotates, it selectively squeezes: only the first end (6031) of the first lifting rod (603) causes its second end (6032) to swing upward to lift the first row of steam caps (7), or simultaneously squeezes the first end (6031) of the first lifting rod (603) and the second lifting rod (605) so that the second ends (6032) of the first lifting rod (603) and the second lifting rod (605) both swing upward to synchronously lift the first row of steam caps (7) and the second row of steam caps (8).

9. The novel electric pressure cooker according to claim 8, characterized in that, Also includes: Two pins (604) are provided on the inner liner cover (301) and are respectively provided with the first hook rod (603) and the second hook rod (605). The bottom surface of the first hook rod (603) and the second hook rod (605) are provided with an arc-shaped groove (6033) that is sleeved on the pin (604) and rotates around its axial direction.

10. The new electric pressure cooker according to claim 8 or 9, characterized in that, The actuating member (602) has a radially extending cam portion (6021), and the first end (6031) of the first lever (603) and the second lever (605) is provided with a protruding surface (60311) that matches the contour of the cam portion (6021).

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