Kitchen waste dryer with IH heating stirring paddle

Abstract

This application relates to the field of household goods technology and discloses a kitchen waste dryer equipped with an IH heating stirring impeller, comprising: a barrel, a stirring component, a sleeve, and an electromagnetic heating component; the bottom of the barrel has a mounting base with a through hole; a rotating shaft is rotatably connected to the mounting base and passes through the through hole; the stirring component is rotatably sleeved on the mounting base, and the rotating shaft is drive-connected to the stirring component; the sleeve is fixedly connected to the barrel, and the stirring component is located inside the sleeve, with the stirring component and the sleeve spaced apart; one end edge of the sleeve is sealed to the bottom of the barrel, and the other end edge is sealed to the side wall of the barrel, with the outer wall of the sleeve and the inner wall of the barrel spaced apart to form a sealed chamber; the sealed chamber is filled with a heat-conducting liquid; the electromagnetic heating component is located below the barrel, and the rotating shaft is drive-connected to the output end of a motor. This eliminates heating dead zones and uneven heating, achieving gentle and uniform drying, and significantly improving drying quality and thermal energy utilization efficiency.

Description

Technical Field

[0001] This application relates to the field of household goods technology, and specifically to a kitchen waste dryer equipped with an IH heated stirring paddle. Background Technology

[0002] Food waste is characterized by high moisture content, high organic matter content, and high perishability. Its efficient treatment and resource utilization are crucial aspects of urban management and environmental protection. Drying and volume reduction is a key pre-treatment process for food waste, aiming to significantly reduce the weight and volume of waste by removing moisture, thus creating favorable conditions for subsequent resource utilization pathways such as composting, incineration, or production of derived fuels (RDF).

[0003] Currently, most kitchen waste drying equipment on the market uses heating methods such as hot air convection, electric heating element radiation, or steam jacket conduction. These traditional technologies generally suffer from the following prominent drawbacks in practical applications: Hot air drying suffers from airflow short-circuiting and weak penetration, resulting in uneven heating of materials. The outer layer easily forms a crust and cokes while the inside remains moist, and a large amount of heat is lost with the exhaust gas, with thermal efficiency typically below 50%. Electric heating tubes or jacketed heating are static contact heat transfer methods, where heat must be slowly conducted from the wall to the material. For viscous, accumulated kitchen waste, the heat transfer resistance is high, the temperature rise is slow, energy consumption is high, and there is also a significant temperature gradient. Summary of the Invention

[0004] This application provides a kitchen waste dryer equipped with an IH heated stirring paddle, which aims to solve the above-mentioned problems.

[0005] In one embodiment, a food waste dryer equipped with an IH-heated stirring paddle is provided, comprising: The barrel body has a mounting base at its bottom, and the mounting base has a through hole; a rotating shaft is rotatably connected to the mounting base, and the rotating shaft passes through the through hole. A stirring element, which is rotatably sleeved on the mounting base, and the rotating shaft is connected to the stirring element in a transmission manner; A sleeve is fixedly connected to the body of the barrel, and the stirring element is located inside the sleeve and spaced apart from the sleeve; one end edge of the sleeve is sealed to the bottom of the barrel, and the other end edge is sealed to the side wall of the barrel; the outer wall of the sleeve and the inner wall of the barrel are spaced apart to form a sealed chamber; the sealed chamber is filled with heat-conducting liquid. An electromagnetic heating element is located below the barrel body, and the rotating shaft is connected to the output end of the motor.

[0006] Among them, IH heating (Induction Heating) involves a coil (excitation coil) inside the device that is energized by alternating current, generating a high-frequency alternating magnetic field. When this magnetic field passes through the metal agitator, it generates countless eddy currents inside, causing the agitator to heat up rapidly.

[0007] Both the barrel and the sleeve are made of 430 ferritic stainless steel. The sleeve is welded to the barrel to achieve a sealed connection. An opening on the outside of the barrel connects to the sealed chamber, allowing the user to inject heat-conducting fluid. The opening is then plugged into a stopcock to seal the chamber. The injected heat-conducting fluid occupies four-fifths of the sealed chamber's volume, preventing bulging and deformation caused by the expansion of the heat-conducting fluid upon heating.

[0008] The agitator is fixedly connected to the rotating shaft, and the rotating shaft is connected to the output end of the motor via a flange.

[0009] Both the barrel and the sleeve are made of 430 ferritic stainless steel, which has good ferromagnetism (ensuring IH heating efficiency), high resistivity (facilitating eddy current heat generation), excellent corrosion resistance and mechanical strength, ensuring a long service life for the core heating components.

[0010] The sleeve and barrel are sealed by welding, and an injection hole with a stopcock is reserved on the outside. The injection chamber is filled with heat-conducting liquid to about 80% of its volume, which provides a safe space for the thermal expansion of the liquid. This effectively prevents the risk of deformation or rupture due to excessive pressure in the chamber caused by thermal expansion, and ensures the long-term reliability of the seal.

[0011] The agitator is connected to the external motor via a flange through a rotating shaft, resulting in a simple and reliable transmission structure that facilitates disassembly, maintenance, or replacement. The sleeve-sealed chamber is encapsulated in one piece, requiring virtually no maintenance and providing peace of mind for users.

[0012] The outer casing of the barrel is fitted with a fixed insulation layer.

[0013] In one embodiment, the stirring component includes a mounting portion and stirring blades; the mounting portion has a groove for rotatably fitting onto the mounting base; the rotating shaft is fixedly abutted against the inner wall of the groove; both the mounting portion and the stirring blades are made of 430 ferritic stainless steel.

[0014] In one embodiment, the stirring blade has multiple strip-shaped cavities arranged sequentially and at intervals within the stirring blade, and the extending direction of each cavity intersects the plane of the barrel body.

[0015] Specifically, the stirring component can be a 3D-printed one-piece molded part. The stirring blade has a threaded opening that communicates with the cavity, and a threaded pin is threaded into the threaded opening to facilitate opening or closing the cavity.

[0016] The wall thickness between two adjacent cavities is 0.8 mm to 1.5 mm, and the wall thickness from the inner wall of the cavity to the outer surface of the stirring blade is 0.8 mm to 1.5 mm.

[0017] The stirring blades are spirally wrapped around the mounting part, and the extension direction of the multiple strip-shaped cavities is perpendicular to the plane of the bottom of the barrel.

[0018] In one embodiment, each cavity is filled with the heat-conducting fluid.

[0019] In one embodiment, the heat-conducting fluid is a fluid of iron oxide particles mixed with water, wherein the size of the iron oxide particles is 10 nm to 20 nm.

[0020] Specifically, a 1.0% concentration of Fe3O4-water nanofluid can improve the heat transfer capacity to the environment by 35.1% compared to the case without a magnetic field.

[0021] In one embodiment, the electromagnetic heating element includes a first heating coil and a second heating coil; the first heating coil is located directly below the sealed chamber; and the second heating coil is located directly below the stirring element.

[0022] Specifically, the first heating coil is a high-frequency excitation coil.

[0023] In one embodiment, there are multiple second heating coils, and these multiple second heating coils are arranged at circumferential intervals around the axis of rotation.

[0024] In one embodiment, the electromagnetic heating element further includes a control module, a temperature detection module, and a moisture detection module; the temperature detection module and the moisture detection module are both fixedly installed inside the barrel, and the electromagnetic heating element, the temperature detection module, and the moisture detection module are all electrically connected to the control module.

[0025] Specifically, the control module, temperature detection module, and moisture detection module correspond to existing programmable logic controllers, temperature sensors, and moisture sensors on the market, respectively.

[0026] In one embodiment, the control module has a control algorithm model that can adjust the power and frequency of the electromagnetic heating element.

[0027] In one embodiment, the thickness of the bottom of the barrel is 0.5 mm to 2 mm.

[0028] The beneficial effects of this application are: A sealed sleeve filled with heat-conducting fluid is installed inside the drum. An electromagnetic heating element (IH coil) located below the drum first efficiently heats the bottom area of ​​the drum corresponding to the bottom of the sleeve. The heat is rapidly homogenized within the sleeve through the highly thermally conductive medium (heat-conducting fluid), making the entire sleeve wall a constant-temperature, stable, large "surface" heat source. This design upgrades traditional "point" or "line" heating to "surface" heating, uniformly and radiating heat from 360 degrees to all materials within the sleeve. This eliminates heating dead zones and uneven heating, achieving gentle and uniform drying, and significantly improving drying quality and thermal energy utilization efficiency.

[0029] This also avoids excessive heating of the bottom of the barrel by the electromagnetic heating element, which can cause localized high temperatures in that area and improve the service life of the barrel.

[0030] The agitator operates inside the sleeve, but it does not directly undertake the main heating function. Because the sleeve wall temperature is uniform and precisely controllable, it avoids the risk of material scorching due to excessively high wall temperatures. Even if a small amount of material adheres, it adheres to the constant-temperature wall surface, unlike traditional equipment where an insulating layer forms on the heating element. The agitator's primary function is optimized for pure, powerful mechanical crushing and mixing, effectively scraping the inner wall of the sleeve and breaking up material clumps. This maintains a good heating state and heat transfer interface for the material, ensuring continuous and efficient equipment operation and eliminating the problem of frequent shutdowns due to deteriorated heat transfer. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a top view schematic diagram of a dryer according to an embodiment of this application; Figure 2 This is a top view schematic diagram of another dryer according to an embodiment of this application; Figure 3 This is a top view of a dryer according to an embodiment of this application; Figure 4 This is an embodiment of the present application. Figure 2 The front view of the cross section; Figure 5 This is an embodiment of the present application. Figure 2 A schematic diagram of the cross-sectional structure in the middle; Figure 6 This is a schematic diagram of the dryer and electromagnetic heating element assembly according to an embodiment of this application; Figure 7This is a top view schematic diagram of an embodiment of the electromagnetic heating element of this application; Figure 8 This is a schematic diagram of the dryer and electromagnetic heating element assembly according to an embodiment of this application (the first heating coil is located in the sealed cavity); Figure 9 This is a schematic diagram of the dryer and electromagnetic heating element assembly according to an embodiment of this application (the first heating coil is located outside the barrel). Figure 10 This is a control module control flowchart of an embodiment of this application; The components include: 1. Barrel body; 11. Mounting base; 12. Through hole; 13. Rotating shaft; 14. Handle; 15. Protrusion; 2. Stirring component; 21. Mounting part; 22. Stirring blade; 23. Groove; 24. Cavity; 3. Sleeve; 31. Sealed chamber; 4. Electromagnetic heating component; 41. First heating coil; 42. Second heating coil; 5. Control module; 6. Temperature detection module; 7. Moisture detection module. Detailed Implementation

[0033] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] This application proposes improvements and innovations, and presents the following embodiments.

[0036] In some implementations, please refer to Figures 1 to 10 A kitchen waste dryer equipped with an IH heated agitator is provided, comprising: The barrel body 1 has a mounting base 11 at its bottom, and a through hole 12 is provided on the mounting base 11; a rotating shaft 13 is rotatably connected to the mounting base 11, and the rotating shaft 13 passes through the through hole 12. A stirring element 2 is rotatably mounted on a mounting base 11, and a rotating shaft 13 is connected to the stirring element 2 in a transmission manner. Sleeve 3 is fixedly connected inside barrel 1, and stirring element 2 is located inside sleeve 3, with stirring element 2 and sleeve 3 spaced apart; one end edge of sleeve 3 is sealed to the bottom of barrel 1, and the other end edge is sealed to the side wall of barrel 1; the outer wall of sleeve 3 and the inner wall of barrel 1 are spaced apart to form a sealed chamber 31; the sealed chamber 31 is filled with heat-conducting liquid. Electromagnetic heating element 4 is located below the barrel body 1, and the rotating shaft 13 is connected to the output end of the motor for transmission.

[0037] A sealed sleeve 3 filled with heat-conducting fluid is installed inside the barrel 1. An electromagnetic heating element 4 (IH coil) located below the barrel 1 first efficiently heats the bottom area of ​​the barrel 1 corresponding to the bottom of the sleeve 3. The heat is rapidly homogenized within the sleeve 3 through the highly thermally conductive medium (heat-conducting fluid), making the entire sleeve 3 wall a constant-temperature, stable, large "surface" heat source. This design upgrades traditional "point" or "line" heating to "surface" heating, with heat being uniformly and radiatively transferred to all materials within the sleeve 3 from a 360-degree direction. This fundamentally eliminates heating dead zones and uneven heating, achieving gentle and uniform drying, and significantly improving drying quality and thermal energy utilization efficiency.

[0038] This also avoids the electromagnetic heating element 4 from overheating the bottom of the barrel 1, which would cause localized high temperatures in that area, thus improving the service life of the barrel 1.

[0039] The agitator 2 operates inside the sleeve 3, but it does not directly undertake the main heating function. Because the sleeve 3 wall temperature is uniform and precisely controllable, it avoids the risk of material scorching due to excessively high wall temperatures. Even if a small amount of material adheres, it adheres to the constant-temperature wall surface, unlike traditional equipment where an insulating layer forms on the heating element. The main function of the agitator 2 is optimized for pure, powerful mechanical crushing and mixing. It effectively scrapes the inner wall of the sleeve 3 and breaks up material clumps, maintaining a good heating state and heat transfer interface for the material, ensuring continuous and efficient equipment operation, and eliminating the problem of frequent shutdowns due to deteriorated heat transfer.

[0040] Among them, IH heating (Induction Heating) involves a coil (excitation coil) inside the device that is energized by alternating current, generating a high-frequency alternating magnetic field. When this magnetic field passes through the metal agitator, it generates countless eddy currents inside, causing the agitator to heat up rapidly.

[0041] Both the barrel body 1 and the sleeve 3 are made of 430 ferritic stainless steel. The sleeve 3 is fixed to the barrel body 1 by welding, achieving a sealed connection. The barrel body 1 has an opening on its exterior that communicates with the sealed chamber 31, allowing the user to inject heat-conducting fluid. The opening is then plugged into a stopcock to seal the chamber 31. The injected heat-conducting fluid occupies four-fifths of the volume of the sealed chamber 31, preventing bulging and deformation of the chamber due to the expansion of the heat-conducting fluid upon heating.

[0042] The stirring component 2 is fixedly connected to the rotating shaft 13, and the rotating shaft 13 is connected to the output end of the motor through a flange.

[0043] Both the barrel body 1 and the sleeve 3 are made of 430 ferritic stainless steel, which has good ferromagnetism (ensuring IH heating efficiency), high resistivity (facilitating eddy current heat generation), excellent corrosion resistance and mechanical strength, ensuring the long service life of the core heating components.

[0044] The sleeve 3 and the barrel 1 are sealed by welding, and a liquid injection hole with a plug is reserved on the outside. The heat-conducting liquid is injected into the chamber to about 80% of its volume, which provides a safe space for the thermal expansion of the liquid. This effectively prevents the risk of deformation or rupture due to excessive pressure in the chamber caused by thermal expansion, and ensures the long-term reliability of the seal.

[0045] The agitator 2 is connected to the external motor via a flange through the rotating shaft 13. The transmission structure is simple and reliable, and easy to disassemble, maintain, or replace. The sleeve 3 seals the chamber 31 in a single encapsulation, requiring virtually no maintenance and providing peace of mind for the user.

[0046] The outer shell of the barrel is fitted with a fixed insulation layer.

[0047] Specifically, such as Figure 1 As shown, a handle 14 is hinged to the inner wall of the bucket body 1. The handle 14 can fit snugly against the inner wall of the bucket body 1, and the inner wall of the bucket body 1 has a protrusion 15 for supporting the handle 14. The handle 14 is hinged to the inner wall of the bucket body 1 and can fit snugly against the inner wall. The protrusion 15 on the inner wall is used to support the handle 14 in the snug state, preventing it from falling down and interfering with the operation of the mixing component 2 or getting stuck with garbage. The ingenious structural design improves the convenience and reliability of use.

[0048] In one embodiment, the stirring component 2 includes a mounting part 21 and a stirring blade 22; the mounting part 21 has a groove 23 for rotating and sleeved on the mounting base 11; the rotating shaft 13 is fixedly abutted against the inner wall of the groove 23; both the mounting part 21 and the stirring blade 22 are made of 430 ferritic stainless steel.

[0049] The tight contact and fixation between the mounting part 21 with the groove 23 and the rotating shaft 13 ensures efficient and reliable power transmission from the motor to the mixing component 2, and can withstand the large torque generated when mixing viscous materials.

[0050] Both the mounting section 21 and the stirring blades 22 are made of the same 430 ferritic stainless steel as the barrel body 1. Although the stirring element 2 is not the main heat source, it is made of ferromagnetic material (such as 430 stainless steel) and will still generate heat in the IH magnetic field, becoming a "mobile auxiliary heat source". This design cleverly forms a synergy between "static surface heating of the sleeve 3" and "dynamic point heating of the stirring element 2". The sleeve 3 provides a stable and uniform background temperature field, while the rotating stirring element 2 penetrates deep into the material, targeting and shearing the core clumps that are in direct contact with it and may have higher moisture content. This achieves a perfect combination of macroscopic uniformity and microscopic enhancement, further accelerating the overall drying speed, especially when processing high-moisture and viscous materials.

[0051] In one embodiment, the stirring blade 22 has a plurality of strip-shaped cavities 24, which are arranged sequentially at intervals within the stirring blade 22, and the extending direction of each cavity 24 intersects the plane of the barrel 1.

[0052] Specifically, the stirring component 2 can be a 3D-printed one-piece molded part. The stirring blade 22 has a threaded opening that communicates with the cavity 24, and a threaded pin is threaded into the threaded opening to facilitate opening or closing the cavity 24.

[0053] The wall thickness between two adjacent cavities 24 is 0.8 mm to 1.5 mm, and the wall thickness from the inner wall of cavity 24 to the outer surface of stirring blade 22 is 0.8 mm to 1.5 mm.

[0054] The stirring blades 22 are spirally wrapped around the mounting part 21, and the extension direction of the multiple strip-shaped cavities 24 is perpendicular to the plane where the bottom of the barrel 1 is located.

[0055] Multiple strip-shaped cavities 24 extending in a direction intersecting (preferably perpendicular) with the bottom plane of the barrel are provided within the stirring blade 22, transforming the solid blade into a thin-walled network structure with a specific wall thickness. The wall thickness is precisely controlled between 0.8 mm and 1.5 mm to match the skin depth at the IH heating frequency, ensuring that the magnetic field energy penetrates each metal wall with almost no attenuation, resulting in a material utilization rate close to 100%, thereby converting magnetic field energy into eddy current heat at several times the efficiency of a solid structure.

[0056] The cavity 24 structure, while ensuring the wall thickness meets electromagnetic requirements, significantly reduces the weight of the stirring component 2, thereby lowering the load and energy consumption of the drive motor. The combination of the spiral blades and the vertical cavity 24 enables the blades to generate strong axial pumping and radial cutting effects during rotation, resulting in better mixing.

[0057] The complex internal cavity 24 structure can be precisely realized through 3D printing, and the threaded pin design facilitates the sealing of the cavity 24 and subsequent possible maintenance or media replacement.

[0058] In one embodiment, each cavity 24 is filled with a heat-conducting fluid.

[0059] The heat-conducting liquid filling the cavity 24 constitutes a "built-in micro thermal management system". When the stirring component 2 generates heat due to the eddy current effect in the magnetic field, the heat-conducting liquid can quickly transfer the heat from the high temperature point (such as the blade tip and edge) to the low temperature point through flow or phase change, which greatly eliminates the internal temperature difference of the stirring component 2 itself, making it a more uniform mobile heat source and avoiding the scorching of materials due to local overheating.

[0060] The heat transfer fluid increases the overall heat capacity of the stirring component 2, making it more capable of storing heat. When intermittently entering a strong magnetic field region, it can absorb and store more heat, and when entering a weak magnetic field region, it can continuously release heat, resulting in a more stable heat flow.

[0061] In one embodiment, the heat transfer fluid is a fluid of iron oxide particles mixed with water, wherein the size of the iron oxide particles is 10 nm to 20 nm.

[0062] Specifically, a 1.0% concentration of Fe3O4-water nanofluid can improve the heat transfer capacity to the environment by 35.1% compared to the case without a magnetic field.

[0063] Table 1 below shows the comparative experimental results of Fe3O4-water nanofluids with mass fractions of 0.8%, 1.0%, and 1.2%.

[0064] Test items and indicators 0.8% mass fraction 1.0% quality fraction (benchmark) 1.2% mass fraction Test Methods and Objectives 1. Enhanced thermal conductivity; improvement in heat transfer coefficient (compared to pure water) +22% ~ +28% +30% ~ +36% +25% ~ +32% Objective: To evaluate the basic thermal conductivity. Methods: The thermal conductivity of nanofluids was measured at constant temperature using either the hot-wire method or the transient planar heat source method. 2. Magnetic field response performance; temperature rise rate difference with / without magnetic field +7.5°C / min +9.8°C / min +8.2°C / min Objective: To evaluate the real-time heat transfer enhancement capability under applied magnetic field, which is the core advantage. Method: Under the same heating power, the outlet temperature rise rate of nanofluid passing through the microchannel was compared before and after the application of a magnetic field. Overall heat transfer enhancement rate 28% 35% 30% Method: Calculate the percentage increase in stable heat transfer for a fixed heat load under the influence of a magnetic field. 3. Engineering applicability; increase in dynamic viscosity (compared to pure water) +15% ~ +20% +25% ~ +35% +40% ~ +60% Objective: To evaluate the feasibility and long-term stability of its application in actual equipment. Method: Measurement was performed using a rotational viscometer. Viscosity increase directly affects pumping resistance and internal circulation efficiency. Settlement rate after 24 hours of standing < 3% < 5% > 10% Method: Observe the volume percentage of the bottom sediment after settling. High settling rates may lead to clogging and performance degradation. According to Table 1 above, 0.8% has good performance but is not optimal; 1.0% achieves the best balance between performance and stability; and 1.2% has reduced overall applicability due to viscosity and sedimentation issues.

[0065] A magnetic fluid composed of Fe3O4 nanoparticles and water was used as the heat transfer fluid, exhibiting thermal conductivity far exceeding that of ordinary liquids. Experimental data shows that a 1.0% concentration of this nanofluid, under the influence of a magnetic field, can increase its heat transfer capacity to the environment by 35% compared to pure water. This can maximize the heat homogenization within the stirring element 2 and the rate of external heat transfer.

[0066] The nano-magnetic fluid itself can also generate heat in a high-frequency magnetic field through mechanisms such as hysteresis and relaxation. When the magnetic fluid inside the stirring element 2 rotates with the stirring element 2 to the strong magnetic field region at the bottom of the barrel, it will generate additional heat, which will be superimposed with the eddy current heat of the metal wall to form a composite heating effect of "solid heating + liquid heating", which further improves the power density and response speed of the stirring element 2 as an auxiliary heat source.

[0067] In one embodiment, the electromagnetic heating element 4 includes a first heating coil 41 and a second heating coil 42; the first heating coil 41 is located directly below the sealed chamber 31; and the second heating coil 42 is located directly below the stirring element 2.

[0068] Specifically, the first heating coil 41 is a high-frequency excitation coil.

[0069] The electromagnetic heating element 4 is divided into a first heating coil 41 corresponding to the sealing sleeve 3 and a second heating coil 42 corresponding to the stirring element 2, realizing independent and precise control of the "static surface heat source" and the "dynamic point heat source". The power ratio of the two parts can be flexibly adjusted according to the needs of different drying stages to achieve optimal energy efficiency.

[0070] For example, high-power heating can be used simultaneously during the start-up phase to quickly establish a thermal field; during the constant-speed drying period, the power of the stirring coil 2 can be reduced, with the sleeve 3 being the main source of heating; and when encountering stubborn wet blocks, the power of the stirring coil 2 can be instantly increased to carry out a focused "thermal attack".

[0071] In one embodiment, there are multiple second heating coils 42, and the multiple second heating coils 42 are arranged around the circumferential axis 13 at intervals.

[0072] Multiple second heating coils 42 are arranged circumferentially along the rotating shaft 13, forming a static distribution of magnetic field strength with varying intensity on the bottom plane of the barrel. The rotating stirring blades 2 periodically pass through magnetic field regions of different intensities, thereby achieving periodic changes in heating and dynamic homogenization of their own temperature.

[0073] Based on feedback from the temperature sensor, the control module 5 can independently adjust the power of each circumferential second coil. When a low temperature is detected in a certain circumferential area inside the container, the power of the coil at the corresponding position can be increased, and the rotation of the stirring element 2 can be used to precisely "carry" the heat to the low-temperature area, achieving intelligent heat equalization in three-dimensional space.

[0074] In one embodiment, the electromagnetic heating element 4 further includes a control module 5, a temperature detection module 6, and a moisture detection module 7; the temperature detection module 6 and the moisture detection module 7 are both fixedly installed inside the barrel 1, and the electromagnetic heating element 4, the temperature detection module 6, and the moisture detection module 7 are all electrically connected to the control module 5.

[0075] Specifically, control module 5, temperature detection module 6, and moisture detection module 7 correspond to existing programmable logic controllers, temperature sensors, and moisture sensors on the market, respectively.

[0076] Temperature and moisture sensors collect real-time data on the physical state of the materials inside the drum, and the data is fed back to a programmable logic controller (PLC) to form a closed-loop control system. The equipment can operate automatically according to a preset process curve, reducing manual intervention and ensuring consistent drying quality.

[0077] Achieving a leap from "heating" to "drying": The core of the control logic has been upgraded from the traditional "temperature control" to "moisture evaporation control." The system determines the drying stage based on real-time moisture data and dynamically adjusts parameters such as heating power and stirring speed accordingly to ensure that the moisture removal target is achieved with the highest energy efficiency.

[0078] In one embodiment, the control module 5 has a control algorithm model that can adjust the power and frequency of the electromagnetic heating element 4.

[0079] Algorithm models (such as existing Model Predictive Control, MPC) can predict future states based on system models and real-time sensor data, and pre-calculate the optimal power and frequency control sequence. This allows the equipment to adapt to changes in material type and initial moisture content, always operating at its most efficient point, with overall energy efficiency improved by more than 20% compared to traditional PID control.

[0080] The algorithm can dynamically adjust the operating frequency of the excitation coil. On the one hand, it tracks the system resonance point to maintain the highest efficiency of electrical energy to magnetic energy conversion. On the other hand, it adjusts the frequency according to the drying stage to change the magnetic field penetration depth, realizing the mode switching from deep internal heating to fine surface heating.

[0081] Specifically, a new algorithm model can be designed, namely a dual-source collaborative algorithm based on heat flux closed-loop and dynamic front tracking; details are as follows: I. Algorithm Overview and Core Concepts 1. Core Metaphor: The Battle of the Hot-Wet Front; Process Perception: View the drying of kitchen waste as a battle. Heat (our troops) needs to conquer the material positions occupied by moisture (the enemy's defenses). The evaporation interface is the "front line" of the battle.

[0082] Control objective: The algorithm is the commander. The objective is not to rigidly control the temperature at a certain point, but to perceive the overall situation of the battlefield (the position, intensity, and resistance of the vanguard) and optimize the deployment of two forces with different characteristics (three heat sources on the sleeve and two heat sources on the stirring element) to win the battle (achieve the target moisture content) with the least cost (energy consumption) and the fastest speed (time).

[0083] 2. The core elements of the algorithm; State definition innovation: Instead of directly using the original values ​​of "temperature" and "moisture", it defines and calculates "heat flow efficiency η(t)" and "moisture transport resistance R" in real time. mDeep physical state variables such as “(t)” and “spatial temperature gradient field ∇T”.

[0084] Innovative control logic: It abandons the feedback loop of "setpoint-error-adjustment" and adopts a direct-drive mode of "physical state perception → rule mapping → control action." Control rules are the code-based representation of physical laws.

[0085] Collaborative Strategy Innovation: Clearly distinguish and coordinate two heat sources: Sleeve 3 is responsible for maintaining the basic thermal environment and static uniform temperature; Stirring component 2 serves as a "thermal tactical unit" for front-end reinforcement, resistance breaking, and dynamic thermal compensation.

[0086] II. Specific Architecture: A three-layer closed loop of perception, decision-making, and execution; Table 2 below clearly illustrates the complete information flow and control loop of the algorithm: Physical state variables Definitions and Calculation Formulas Physical meaning Real-time heat flux efficiency η(t) <![CDATA[η(t) = (ΔM / Δt) × Lv / P total (t); where: ΔM / Δt is the water evaporation rate (calculated differentially by the moisture sensor), Lv is the latent heat of vaporization of water, and P total This represents the total input electrical power. It measures the efficiency of converting "input electrical energy" into "effective evaporative heat energy". A high η(t) indicates efficient energy utilization and smooth progress of the leading edge; a decrease indicates resistance. <![CDATA[Moisture transport resistance R m (t)]]> <![CDATA[R m (t) ∝ (dT_surface / dt) / (ΔM / Δt) or derived inversely from the model: R m (t) = K × (T core -T surface ) / (ΔM / Δt); (K is the fitting coefficient, T) core (Estimated from the temperature of agitator 2 or the model); <![CDATA[Characterize the difficulty of moisture migrating from the inside of the material to the surface. R m (t) increases, which means that the material crusts and becomes viscous, and the internal capillary structure is damaged.]]> Spatial temperature gradient field ∇T <![CDATA[∇T = [∂T / ∂x, ∂T / ∂y] T The temperature readings are generated by a spatial interpolation algorithm (such as Kriging) using measurements from an array of temperature sensors (T1...Tn) positioned at different heights and circumferential locations on the sleeve wall. The system visually displays the "cold zones" and "overheated zones" of the battlefield. The magnitude and direction of the gradient indicate the uniformity of heat distribution and the main direction of heat transfer. III. Core Algorithm Modules and Mathematical Model Support; 1. Physical state solver; This is a key module for "translating" raw sensor data into battlefield situational awareness.

[0087] 2. Control policy mapper; This is a rule-based decision-making system, the core of which consists of three rules composed of IF-THEN logic, as shown in Table 3 below: rule Triggering condition (IF) Controlling actions (THEN) Collaborative Logic Forward Enhancement Rules <![CDATA[η(t)≧η high And R m (t) stable <![CDATA[Focus energy: slightly increase the heating power (P aux ↑) of the secondary coil to the stirring member 2, and command the stirring member 2 to reduce the rotation speed or stay briefly in the predicted front area (high temperature and high humidity area) for "key burning".]]> <![CDATA["Steady disk and strong point": The power (P main ) of the sleeve 3 is maintained to keep the basic thermal field; the stirring member 2 acts as a shock team to strengthen the heat at the front line.]]> Resistance Breaking Rules <![CDATA[η(t) continuously decreases & R m (t) continuously increases]]> <![CDATA[Brute force cracking: 1. Immediately and significantly increase the rotational speed of the stirring motor (ω ↑↑) to enhance shearing. 2. Send a high-power pulse command (P aux → pulse mode) to the secondary coil to instantaneously heat the stirring part 2 to an extremely high temperature and physically break the crust. 3. In this mode, P main can be slightly reduced to avoid overheating caused by energy accumulation.]]> "Dynamic obstacle removal": The uniform advance strategy is paused, and the strongest mobility (high-speed rotating superheated stirring component 2) is mobilized to directly remove obstacles. Thermal field homogenization rules |∇T| continuously exceeds the threshold in a local region <![CDATA[Precise thermal compensation: 1. For the static cold zone, finely adjust the power (P main _ local ↑) of the corresponding circumferentially segmented main coil. 2. At the same time, adjust the running trajectory or timing of the stirring member 2 so that when it passes above the cold zone, temporarily increase P aux and decrease the rotational speed for "dynamic hot compress".]]> "Static and dynamic combination": The static heat source (sleeve 3) provides basic compensation, while the dynamic heat source (stirring component 2) provides active, point-to-point heat transfer to achieve efficient and uniform temperature. 3. Control command synthesizer; The abstract strategy output by the mapper is synthesized into specific, conflict-free device instructions.

[0088] Priority arbitration: When multiple rules are triggered simultaneously, the priority is set to resistance breaking > thermal field homogenization > front reinforcement to ensure system safety (anti-shelling) and uniformity.

[0089] Command smoothing: Ramps up commands that change power and speed drastically to prevent mechanical and electrical shocks.

[0090] IV. Algorithm pseudocode example; text / / Initialization Set thresholds: η_high, η_low, R_m_high, ∇T_max Loop (every 1 second): / / 1. Perception and Solving Read P_total, T_array[1..n], M, τ Calculate η(t) = f(ΔM, P_total) Calculate R_m(t) = g(T_core, T_surface, ΔM) Calculate ∇T = SpatialInterpolate(T_array) / / 2. Decision and Mapping IF (R_m(t) > R_m_high AND η(t) < η_low): Current mode = "Resistance Breakthrough Mode" Command = {P_main: Hold, P_aux: Pulse mode, ω: Maximum speed} ELSE IF (max(∇T) > ∇T_max): Current mode = "Thermal field homogenization mode" Cold Zone = LocateColdZone(∇T) Command = {P_main[cold zone]: micro-increment, P_aux: cooperative cold zone trajectory boost, ω: adaptive} ELSE IF (η(t) >= η_high): Current mode = "Forward Enhancement Mode" Forward Zone = EstimateFrontZone(T_array, M) Instructions = {P_main: Maintain, P_aux: Slightly increase, ω: Slightly decrease in the forward zone} ELSE: Current mode = "Cruise mode" Instruction = {P_main: base value, P_aux: base value, ω: standard value} / / 3. Composition and Execution Final instruction = SmoothAndArbitrate(instruction) / / Smoothing and priority arbitration Final commands are issued to: main coil power supply, auxiliary coil array power supply, and stirring motor driver. End the loop.

[0091] The control problem of the kitchen waste drying process is defined as the problem of "perception and coordinated intervention of dynamic heat-moisture front".

[0092] Its three major rules are deeply integrated with the hardware characteristics of dual heat sources (area source and point source) and the heatable stirring component 2, and cannot be directly applied to other traditional drying equipment.

[0093] The "physical state solution → rule mapping" architecture breaks away from the classical control theory framework and establishes a new type of control logic that is closer to the intuition of human experts in on-site operation.

[0094] In one embodiment, the thickness of the bottom of the barrel 1 is 0.5 mm to 2 mm.

[0095] Limiting the thickness of the barrel bottom (i.e., the magnetic field penetration path) to a critical range of 0.5mm to 2mm is an optimization result derived from electromagnetic calculations. This thickness ensures the structural rigidity of the barrel bottom while minimizing its "shielding effect" on the magnetic field. An excessively thick barrel bottom would generate a large amount of ineffective eddy current losses, while this optimized thickness allows most of the magnetic field energy to efficiently penetrate the barrel bottom and act on the upper sleeve 3 and stirring component 2, thereby directly improving the energy utilization rate of the entire IH heating system.

[0096] In one embodiment, such as Figure 7 The first heating coil shown is located inside the sealed cavity and wound around the outer wall of the sleeve, directly heating the sleeve, reducing electromagnetic loss and improving heating efficiency.

[0097] Or, such as Figure 8 The first heating coil shown can be wound around the outside of the barrel. Heating the barrel through the coil transfers heat to the heat-conducting liquid, which then transfers the heat to the sleeve. Wrapping the first heating coil around the outside of the barrel facilitates installation and use; simply placing the barrel into the coil heats it. Simultaneously, the first heating coil also provides some stability to the barrel, reducing shaking caused by the stirring mechanism.

[0098] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A kitchen waste dryer equipped with an IH heated stirring paddle, characterized in that, include: The barrel body has a mounting base at its bottom, and the mounting base has a through hole; a rotating shaft is rotatably connected to the mounting base, and the rotating shaft passes through the through hole. A stirring element, which is rotatably sleeved on the mounting base, and the rotating shaft is connected to the stirring element in a transmission manner; A sleeve is fixedly connected to the body of the barrel, and the stirring element is located inside the sleeve and spaced apart from the sleeve; one end edge of the sleeve is sealed to the bottom of the barrel, and the other end edge is sealed to the side wall of the barrel; the outer wall of the sleeve and the inner wall of the barrel are spaced apart to form a sealed chamber; the sealed chamber is filled with heat-conducting liquid. An electromagnetic heating element is located below the barrel body, and the rotating shaft is connected to the output end of the motor.

2. The kitchen waste dryer according to claim 1, characterized in that, The stirring component includes a mounting part and stirring blades; the mounting part has a groove for rotatably fitting on the mounting base; the rotating shaft is fixedly abutted against the inner wall of the groove; both the mounting part and the stirring blades are made of 430 ferritic stainless steel.

3. The kitchen waste dryer according to claim 2, characterized in that, The stirring blade has multiple strip-shaped cavities, which are arranged sequentially at intervals within the stirring blade. The extending direction of each cavity intersects the plane of the barrel body.

4. The kitchen waste dryer according to claim 3, characterized in that, Each cavity is filled with the heat-conducting fluid.

5. The kitchen waste dryer according to claim 4, characterized in that, The heat-conducting fluid is a mixture of iron oxide particles and water, wherein the size of the iron oxide particles is 10 nm to 20 nm.

6. The kitchen waste dryer according to any one of claims 1-5, characterized in that, The electromagnetic heating element includes a first heating coil and a second heating coil; the first heating coil is located directly below the sealed chamber; the second heating coil is located directly below the stirring element.

7. The kitchen waste dryer according to claim 6, characterized in that, The number of the second heating coils is multiple, and the multiple second heating coils are arranged around the circumferential axis at intervals.

8. The kitchen waste dryer according to claim 7, characterized in that, The electromagnetic heating element also includes a control module, a temperature detection module, and a moisture detection module; the temperature detection module and the moisture detection module are both fixedly installed inside the barrel, and the electromagnetic heating element, the temperature detection module, and the moisture detection module are all electrically connected to the control module.

9. The kitchen waste dryer according to claim 8, characterized in that, The control module has a control algorithm model that can adjust the power and frequency of the electromagnetic heating element.

10. The kitchen waste dryer according to claim 9, characterized in that, The thickness of the bottom of the barrel is 0.5mm to 2mm.

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