A soup stock cooking apparatus

By setting an automatic opening and closing mechanism for the material dispersing block and the discharge cylinder at the bottom of the stirring shaft, the problem of slow discharge caused by high viscosity and dead zones in traditional soup cooking equipment is solved, and efficient and automated discharge is achieved.

CN224584152UActive Publication Date: 2026-08-04SICHUAN MEIWEIYUAN FOOD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SICHUAN MEIWEIYUAN FOOD CO LTD
Filing Date
2025-06-18
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Traditional soup base cooking equipment results in slow discharge due to the high viscosity of the material and dead zones in the stirring, and requires manual assistance, which affects production efficiency.

Method used

Design a soup cooking device that includes a stirring shaft and a material dispensing block. The bottom of the stirring shaft extends into the dispensing block inside the discharge cylinder. During the stirring process, the material dispensing block pushes the material. In conjunction with the automatic opening and closing mechanism of the discharge cylinder, it ensures that the material flows evenly and is automatically discharged.

Benefits of technology

It improves the discharge speed of viscous soup mixes and solves the problem of slow discharge caused by material sticking and dead corners in traditional equipment, thus achieving efficient and automated discharge.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to food processing technical field, specifically disclose a kind of soup material boiling equipment;Including heating pot, boiling pot, heating layer and stirring mechanism, the multi-directional heating is realized between boiling pot and heating pot by heating layer, and first stirring vane, second stirring vane are equipped on the stirring shaft of stirring mechanism, and the arc surface of the material pushing portion is equipped on both sides of the material pushing portion of the bottom extension to discharge cylinder.Sure that heat is evenly conducted that heating assembly of heating layer is attached to heating pot inside and / or boiling pot bottom outer wall;Stirring shaft is linked with transmission portion by drive motor, and the full area of boiling pot is covered by driving multilayer stirring vane, and eliminates stirring dead angle;Arc surface of the material pushing portion of the material pushing portion actively pushes soup material to discharge cylinder in stirring process, and realizes accurate discharge control in cooperation with automatic opening and closing mechanism.Detecting component monitors boiling pot temperature in real time, and guarantees boiling process stability.The equipment significantly improves discharge efficiency and boiling uniformity, reduces manual intervention, and is suitable for the automatic production scene of high viscidity soup material.
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Description

Technical Field

[0001] This utility model relates to the field of food processing technology, and in particular to a soup cooking device. Background Technology

[0002] In industrial production fields involving soup preparation and material mixing, the efficiency and effectiveness of the discharge stage have a crucial impact on overall production efficiency. Traditional cooking equipment and common mixing devices have many problems that urgently need to be solved in terms of discharge.

[0003] On the one hand, soup bases typically have a certain viscosity, especially those rich in starch and colloids, which have poor fluidity after cooking. Similarly, during the cooking process of sauces, the high concentration of ingredients and additives increases the viscosity of the material, making it prone to adhering to the inner wall of the pot and the stirring components. When discharged from the outlet of traditional equipment, the material sticks together due to its own viscosity, causing blockage of the discharge channel and resulting in extremely slow discharge speed.

[0004] On the other hand, the design of traditional mixing equipment has flaws, making it difficult to ensure uniform mixing of materials throughout the cooking pot and easily creating mixing dead zones. Taking a common single-shaft mixing equipment as an example, materials near the mixing shaft can be mixed relatively thoroughly, but the mixing effect is weaker in the edges and bottom corners of the cooking pot. In these mixing dead zones, materials may settle or clump, further hindering the discharge process. When attempting to discharge materials from the outlet, these settled and clumped materials cannot pass smoothly through the discharge channel, sometimes requiring manual clearing with tools, significantly impacting production efficiency and increasing labor costs and intensity.

[0005] While Chinese patent "CN221772182U, A Mixing Device for Easy Discharge" improves the discharge problem to some extent by using a displacement mechanism to move the mixing components to enhance the mixing effect and a pusher plate in the pusher assembly to push the material out of the discharge port, this device has limited capacity to handle materials with excessively high viscosity or those in mixing dead zones. When the material is too viscous, the pusher plate has difficulty pushing the material, and the movement of the mixing components cannot fundamentally solve the discharge problem of materials in mixing dead zones. For some complex-shaped cooking pots, it still cannot ensure uniform mixing and smooth discharge of the material. Utility Model Content

[0006] In view of this, the present invention provides a soup cooking device to solve the technical problem that traditional equipment may have slow discharge due to the viscosity of the material or the dead corners of the stirring, which may even require manual assistance and affect efficiency.

[0007] This utility model provides a soup cooking device, including: a cooking pot disposed inside a heating pot; a heating layer for heating the cooking pot provided between the heating pot and the cooking pot; a stirring mechanism for stirring the soup ingredients disposed inside the cooking pot, the stirring mechanism including a stirring shaft disposed inside the cooking pot and a stirring part disposed on the stirring shaft; wherein, a discharge part extending into the cooking pot is provided through the heating pot; the discharge part includes a discharge cylinder; and a material release block extending into the discharge cylinder is provided at the bottom of the stirring shaft.

[0008] Preferably, the heating layer includes a heating component attached to the interior of the heating pot and / or the outer wall of the bottom of the cooking pot.

[0009] Preferably, the stirring mechanism further includes a drive motor and a transmission part that is drively connected to the drive motor; The transmission unit is connected to the stirring shaft, and the transmission shaft can rotate based on the bearing seat provided on the top of the cooking pot.

[0010] Preferably, the stirring part includes a first stirring blade and a second stirring blade, and a connecting rod connecting the first stirring blade and the second stirring blade; The connecting rod is connected to the stirring shaft, and the rotation of the stirring shaft drives the first stirring blade and the second stirring blade.

[0011] Preferably, the material feeding block includes a material feeding body and a first pushing part and a second pushing part disposed on both sides of the material feeding body; The first and second pushing parts are arranged in an arc shape; The top of the material feeding body is also provided with a connecting block that is connected to the stirring shaft.

[0012] Preferably, it also includes a mounting bracket for mounting the heating pot; The mounting bracket includes a first mounting base and a second mounting base, and the heating pot is disposed between the first mounting base and the second mounting base and hinged to the first mounting base and the second mounting base.

[0013] Preferably, it also includes a detection component disposed inside the cooking pot via the top of the cooking pot; The top of the cooking pot includes a first feed inlet and a second feed inlet, as well as a first detection port and a second detection port.

[0014] Preferably, the discharge cylinder is equipped with an automatic opening and closing mechanism, which is controlled by a controller mounted on the mounting frame to perform opening and closing actions.

[0015] Preferably, the detection component further includes a temperature sensor extending through the heating pot and disposed inside the cooking pot, wherein the detection head of the temperature sensor is disposed inside the cooking pot.

[0016] Preferably, the first stirring blade includes a vertical stirring blade and a curved stirring blade that is smoothly connected to the vertical stirring blade; The thickness of the curved stirring blade increases from the end connected to the vertical stirring blade to the end away from the vertical stirring blade. The first stirring blade and the second stirring blade have the same structural configuration.

[0017] The soup cooking device provided by this utility model has the following beneficial effects: In this invention, the soup cooking equipment incorporates a material-discharging block extending from the bottom of the stirring shaft into the discharge cylinder. Utilizing the first and second pushing sections on its two curved sides, the block actively pushes the viscous soup towards the discharge cylinder during stirring. This, combined with the rotation of the stirring shaft, eliminates dead zones at the edges and bottom of the cooking pot, ensuring even flow and aggregation of the material in the discharge area, preventing soup accumulation at the discharge port. Simultaneously, the automatic opening and closing mechanism of the discharge cylinder precisely controls the discharge rhythm via a controller, eliminating manual intervention and significantly improving discharge efficiency. This structural design enhances the discharge speed of viscous soup, completely solving the problems of slow discharge and the need for manual assistance caused by material adhesion and dead zones in traditional equipment, achieving a highly efficient and smooth automated discharge process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 This is a cross-sectional structural diagram of a soup preparation equipment; Figure 2 This is a structural diagram of a soup preparation equipment; Figure 3 This is a schematic diagram of the stirring mechanism; Figure 4 This is a schematic diagram of the material unpacking block; Parts and component numbers in the diagram: 100 - Heating pot, 111 - Insulation cover, 112 - Insulation layer; 200-boiling pot, 210-bearing seat, 211-discharge cylinder, 212-first feed inlet, 213-second feed inlet, 214-first inspection port, 215-second inspection port; 300 - Heating layer, 310 - Heating component; 410-Stirring shaft, 420-First stirring blade, 421-Vertical stirring blade, 422-Curved stirring blade, 430-Second stirring blade, 440-Discharging block, 441-Discharging body, 442-First pushing part, 443-Second pushing part, 444-Connecting block, 450-Drive motor, 460-Transmission part, 470-Connecting rod; 510 - First mounting base, 520 - Second mounting base, 530 - Automatic opening and closing mechanism, 540 - Controller; 600 - Detection component, 610 - Temperature sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0021] Example 1

[0022] Please see Figure 1This utility model provides a soup-cooking device, which is frequently needed in food production. During the soup-cooking process, if the soup has a high viscosity, a common problem arises: the soup tends to adhere to the inside of the cooking pot 200 and the outlet. This phenomenon makes traditional stirring components ineffective, as they cannot efficiently agitate the contents. Consequently, the discharge process becomes sluggish, affecting not only production efficiency but also potentially the quality of the final product.

[0023] Therefore, this embodiment provides an improved soup cooking device to solve the above problems and enable it to process high-viscosity soup more effectively.

[0024] Please see Figure 1 In this embodiment, the cooking equipment includes a heating pot 100 and a cooking pot 200 disposed within the heating pot 100; a heating layer 300 for heating the cooking pot 200 is provided between the heating pot 100 and the cooking pot 200; a stirring mechanism for stirring the soup ingredients is also provided inside the cooking pot 200, the stirring mechanism including a stirring shaft 410 disposed inside the cooking pot 200 and a stirring part disposed on the stirring shaft 410; wherein, a discharge part extending into the cooking pot 200 is provided through the heating pot 100; the discharge part includes a discharge cylinder 211; a material release block 440 extending into the discharge cylinder 211 is provided at the bottom of the stirring shaft 410.

[0025] Please see Figure 1 In use, the heating layer 300 between the heating pot 100 and the cooking pot 200 heats the cooking pot 200, allowing the soup to be cooked inside the cooking pot 200. During the cooking process, the stirring mechanism starts operating, and the stirring shaft 410 drives the stirring part to fully stir the soup, ensuring that the soup is heated evenly and preventing excessive local viscosity. At the same time, the material dispersing block 440 located at the bottom of the stirring shaft 410 extends into the discharge cylinder 211 as the stirring shaft rotates, effectively preventing the soup from accumulating or clogging in the discharge cylinder 211.

[0026] Once the soup base is cooked, it is discharged through the discharge cylinder 211. The material unloading block 440 further ensures the smoothness of the discharge cylinder 211 during the discharge process, avoiding the common problem of poor discharge in traditional equipment.

[0027] Please see Figure 1 The material slurry block 440 extends into the interior of the discharge cylinder 211. When stirring the contents of the discharge cylinder 211, it can effectively break up any viscous accumulation layer that may form in the discharge cylinder 211.

[0028] Furthermore, the heating layer 300 includes a heating component 310, which is attached to the interior of the heating pot 100 and / or the outer wall of the bottom of the cooking pot 200.

[0029] In use, the heating element 310, attached to the inside of the heating pot 100 or the outer wall of the bottom of the cooking pot 200, efficiently transfers heat, ensuring that the soup in the cooking pot 200 is heated evenly. This design not only improves heating efficiency but also reduces energy consumption. Simultaneously, the optimized layout of the heating element 310 prevents localized overheating, thereby extending the equipment's lifespan. In actual operation, users can flexibly adjust the working intensity of the heating element 310 according to the type of soup and cooking needs to achieve optimal cooking results. Furthermore, the material of the heating element 310 has excellent high-temperature resistance, maintaining stable heating performance during prolonged use, further enhancing the equipment's reliability and safety.

[0030] Further, please see Figure 1 and Figure 3 The stirring mechanism further includes a drive motor 450 and a transmission part 460 that is connected to the drive motor 450; the transmission part 460 is connected to the stirring shaft 410, and the stirring shaft 410 can rotate based on the bearing seat 210 disposed on the top of the cooking pot 200.

[0031] The stirring unit includes a first stirring blade 420 and a second stirring blade 430, and a connecting rod connecting the first stirring blade 420 and the second stirring blade 430; the connecting rod is connected to the stirring shaft 410, and the first stirring blade 420 and the second stirring blade 430 are driven by the rotation of the stirring shaft 410.

[0032] In use, the drive motor 450 is started, and power is transmitted to the stirring shaft 410 through the transmission unit 460, causing the stirring shaft 410 to start rotating. As the stirring shaft 410 rotates, the connecting rod drives the first stirring blade 420 and the second stirring blade 430 to move synchronously, thereby thoroughly stirring the soup in the cooking pot 200. This design effectively prevents the soup from settling or sticking to the walls during heating, ensuring even heating and improving cooking quality. Meanwhile, the structures of the first stirring blade 420 and the second stirring blade 430 are carefully designed to achieve efficient stirring at different liquid levels, adapting to various cooking needs. Furthermore, the bearing housing 210 not only enhances the stability of the stirring shaft 410's operation but also reduces frictional loss, thereby improving the overall durability of the equipment.

[0033] Further, please see Figure 3The first stirring blade 420 includes a vertical stirring blade 421 and a curved stirring blade 422 that is smoothly connected to the vertical stirring blade 421; the thickness of the curved stirring blade 422 increases from the end connected to the vertical stirring blade 421 to the end away from the vertical stirring blade 421; the first stirring blade 420 and the second stirring blade 430 have the same structural configuration.

[0034] When stirring the soup base, the soup base is stirred by one side of the vertical stirring blade 421 and the convex surface of the curved stirring blade 422. Because the thickness of the curved stirring blade 422 increases progressively, the stirring force varies according to the thickness, resulting in a more uniform stirring effect at different liquid levels. Simultaneously, the smooth transition between the vertical stirring blade 421 and the curved stirring blade 422 ensures smooth fluid flow during stirring, reducing impact and damage to the soup base and maintaining the integrity of the ingredients.

[0035] Furthermore, the vertical stirring blade 421 is primarily responsible for the initial agitation of the soup ingredients, while the curved stirring blade 422, through its special thickness variation design, gradually enhances the driving force on the soup ingredients, enabling good circulation and flow of the soup ingredients in both horizontal and vertical directions. This structure not only improves stirring efficiency but also effectively avoids the problem of dead zones in localized areas. In addition, since the first stirring blade 420 and the second stirring blade 430 have identical structures, they can work in coordination during operation, further optimizing the stirring effect and ensuring that soup ingredients of different viscosities or densities are thoroughly mixed.

[0036] Further, please see Figure 4 The material feeding block 440 includes a material feeding body 441 and a first pushing part 442 and a second pushing part 443 disposed on both sides of the material feeding body 441; the first pushing part 442 and the second pushing part 443 are arranged in an arc shape; the top of the material feeding body 441 is also provided with a connecting block 444 connected to the stirring shaft 410.

[0037] The specially designed first and second pusher sections 442 and 443 of the feed block 440 ensure durability while minimizing damage to the inner wall of the discharge cylinder 211. Furthermore, its curved surface design effectively guides the flow of the broth, preventing clogging caused by excessive local resistance. The connecting block 444 ensures a secure connection between the feed block 440 and the stirring shaft 410, maintaining structural stability during high-speed operation.

[0038] During the slurry mixing process, the slurry block 440 moves synchronously with the rotation of the mixing shaft 410. The first pushing part 442 and the second pushing part 443 push the soup material at the outlet through the arc surface. Due to the greater thickness of the arc surface, the pushing effect and quality are better, which not only ensures that the soup material can pass through smoothly, but also reduces the wear caused by contact with the soup material.

[0039] Due to the arc-shaped design of the first pushing part 442 and the second pushing part 443, they can apply appropriate pushing force to the soup at different flow rates, thereby further optimizing the discharge efficiency and ensuring seamless connection between the mixing and discharge processes.

[0040] Furthermore, it also includes a mounting bracket for mounting the heating pot 100; the mounting bracket includes a first mounting base 510 and a second mounting base 520, and the heating pot 100 is disposed between the first mounting base 510 and the second mounting base 520 and hinged to the first mounting base 510 and the second mounting base 520.

[0041] In this embodiment, the angle and position of the heating pot 100 can be flexibly adjusted according to actual needs via the mounting bracket, thereby improving operational convenience and the applicability of the equipment. The first mounting base 510 and the second mounting base 520, connected by a hinge, not only enhance the stability of the structure but also effectively reduce the risk of displacement caused by equipment vibration. In addition, this design facilitates quick disassembly of the heating pot 100 during cleaning or maintenance, further improving the practicality and work efficiency of the equipment.

[0042] Further, please see Figure 1 and Figure 2 It also includes a detection component 600 disposed inside the cooking pot 200 via the top of the cooking pot 200; the top of the cooking pot 200 includes a first feed inlet 212 and a second feed inlet 213, as well as a first detection port 214 and a second detection port 215.

[0043] The first feed inlet 212 and the second feed inlet 213, as well as the first detection port 214 and the second detection port 215, can all be sealed with the cooking pot 200, so that the pressure inside the cooking pot 200 can be increased during operation.

[0044] Furthermore, through the first detection port 214 and the second detection port 215, the detection component 600 can monitor key parameters such as the pressure and material state inside the cooking pot 200 in real time. This design not only improves the accuracy of detection but also reduces the interference of the external environment on the detection results. At the same time, the reasonable distribution of the first feed port 212 and the second feed port 213 allows for the addition of different raw materials, avoiding errors that may occur during material mixing and further optimizing the operation process.

[0045] Furthermore, the discharge cylinder 211 is equipped with an automatic opening and closing mechanism 530, which is controlled by a controller 540 mounted on the mounting frame to perform opening and closing actions. In use, the controller 540 automatically triggers the automatic opening and closing mechanism 530 based on a preset program or real-time detection data. This intelligent design not only improves the automation level of the equipment but also significantly reduces the need for manual intervention, thereby lowering the possibility of operational errors.

[0046] Meanwhile, the automatic opening and closing mechanism 530 has a fast response speed, enabling it to open or close the discharge port in a short time, ensuring the continuity and efficiency of the production process. Furthermore, the mechanism has good sealing performance, effectively preventing material leakage or the entry of external impurities when closed.

[0047] Furthermore, the detection component 600 also includes a temperature sensor 610 extending through the heating pot 100 and disposed inside the cooking pot 200, with the detection head of the temperature sensor 610 disposed inside the cooking pot 200.

[0048] This allows for real-time monitoring of temperature changes inside the cooking pot 200, providing operators with accurate temperature data. This not only helps ensure that materials maintain a suitable temperature range during heating but also prevents product quality issues caused by abnormal temperatures. Furthermore, the temperature sensor 610 is positioned inside the cooking pot 200, effectively preventing external heat from affecting the detection results, thereby further improving the accuracy and reliability of temperature measurement.

[0049] Furthermore, a heat insulation cover 111 is provided on the outside of the cooking pot 200, and a heat insulation layer 112 is formed between the heat insulation cover 111 and the cooking pot 200 to keep the temperature inside the cooking pot 200.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A soup stock cooking device, characterized in that, include: A heating pot (100) and a cooking pot (200) disposed within the heating pot (100); A heating layer (300) for heating the cooking pot (200) is provided between the heating pot (100) and the cooking pot (200). The cooking pot (200) is also provided with a stirring mechanism for stirring the soup ingredients. The stirring mechanism includes a stirring shaft (410) disposed inside the cooking pot (200) and a stirring part disposed on the stirring shaft (410). The heating pot (100) is also provided with a discharge section extending into the cooking pot (200); the discharge section includes a discharge cylinder (211); the bottom of the stirring shaft (410) is provided with a material release block (440) extending into the discharge cylinder (211).

2. The soup stock cooking device according to claim 1, characterized in that, The heating layer (300) includes a heating component (310) attached to the interior of the heating pot (100) and / or the outer wall of the bottom of the cooking pot (200).

3. A stock cooking apparatus according to claim 1, wherein The stirring mechanism also includes a drive motor (450) and a transmission part (460) that is connected to the drive motor (450). The transmission unit (460) is connected to the stirring shaft (410) and the stirring shaft (410) can rotate based on the bearing seat (210) provided on the top of the cooking pot (200).

4. The soup stock cooking equipment according to claim 1, characterized in that, The stirring unit includes a first stirring blade (420) and a second stirring blade (430) and a connecting rod (470) connecting the first stirring blade (420) and the second stirring blade (430). The connecting rod is connected to the stirring shaft (410), and the rotation of the stirring shaft (410) drives the first stirring blade (420) and the second stirring blade (430).

5. The soup stock cooking device according to claim 1, characterized in that, The material feeding block (440) includes a material feeding body (441) and a first material pushing part (442) and a second material pushing part (443) disposed on both sides of the material feeding body (441). The first pusher section (442) and the second pusher section (443) are arranged in an arc shape; The top of the material feeding body (441) is also provided with a connecting block (444) that is connected to the stirring shaft (410).

6. A stock cooking apparatus as defined in claim 1, wherein It also includes a mounting bracket for mounting the heating pot (100); The mounting bracket includes a first mounting base (510) and a second mounting base (520), and the heating pot (100) is disposed between the first mounting base (510) and the second mounting base (520) and hinged to the first mounting base (510) and the second mounting base (520).

7. The soup stock cooking device according to claim 1, characterized in that, It also includes a detection component (600) disposed inside the cooking pot (200) via the top of the cooking pot (200); The top of the cooking pot (200) includes a first feed inlet (212) and a second feed inlet (213), as well as a first detection port (214) and a second detection port (215).

8. The soup stock cooking device according to claim 6, characterized in that, The discharge cylinder (211) is provided with an automatic opening and closing mechanism (530), which is controlled by a controller (540) set on the mounting frame to perform opening and closing actions.

9. The soup stock cooking device according to claim 7, characterized in that, The detection assembly (600) further includes a temperature sensor (610) extending through the heating pot (100) and disposed inside the cooking pot (200), with the detection head of the temperature sensor (610) disposed inside the cooking pot (200).

10. The soup preparation equipment according to claim 4, characterized in that, The first stirring blade (420) includes a vertical stirring blade (421) and a curved stirring blade (422) that is smoothly connected to the vertical stirring blade (421). The thickness of the curved stirring blade (422) increases from the end connected to the vertical stirring blade (421) toward the end away from the vertical stirring blade (421); The first stirring blade (420) and the second stirring blade (430) have the same structural configuration.