A stirring cutter for a kitchen waste disposer and a kitchen waste disposer

Abstract

This utility model discloses a stirring blade for a food waste disposer and a food waste disposer having the same, aiming to solve the problem of uneven processing of upper layer materials caused by the structural limitations of existing stirring blades. The stirring blade of this utility model includes a blade holder, at least one stirring unit arranged along the side wall of the blade holder, and an innovative loosening section located on the upper part of the blade holder. When the blade rotates, this loosening section can lift or tumble the upper layer of food waste, forcing the material to participate in the grinding cycle at the bottom. By improving the blade's own structure, this utility model fundamentally solves the problems of material stratification and caking, significantly improving the uniformity of processing and the overall efficiency of the machine.

Description

[Technical Field] This utility model relates to the technical field of kitchen waste treatment equipment, and in particular to a mixing blade for a kitchen waste processor and a kitchen waste processor. [Background Technology] With the popularization of environmental protection concepts, household food waste disposers, which can reduce and harmlessly treat kitchen waste at the source, have been widely used in the market. These disposers typically have motor-driven mixing blades in the mixing chamber. Through rotation and mixing, combined with the drying effect of the heating element, wet waste is transformed into dry powder or granules.

[0003] However, existing mixing blades suffer from general limitations in their structural design. Whether disc-type or arm-type, these blades concentrate their main force and structure in the lower-middle region of the mixing chamber. In actual processing, the complex composition and poor flowability of kitchen waste easily lead to the accumulation and compaction of upper-layer materials, which cannot effectively participate in the grinding and drying cycle at the bottom. This results in a static layer that rotates only with the mixing blades but has no internal relative movement. This not only leads to severely uneven processing results—over-processing of the lower layer and under-processing of the upper layer—but also significantly reduces processing efficiency, prolongs working time, and causes unnecessary energy consumption. [Utility Model Content] The purpose of this utility model is to provide a mixing blade for a food waste processor and a food waste processor, aiming to solve the technical problems in the prior art, such as the inability of the upper material in the mixing chamber to effectively participate in circulation, uneven processing, and low efficiency caused by the limited structure of the mixing blade.

[0005] This utility model is achieved through the following technical solution: A mixing blade for a food waste disposer includes a blade holder serving as a mounting base and adapted to be connected to a drive source. The upper part of the blade holder is provided with a loosening part for lifting or tumbling the upper layer of food waste, and at least one mixing unit for mixing and grinding the food waste is provided along the side wall of the blade holder.

[0006] As described above, the stirring unit includes a first stirring section, a second stirring section, and a third stirring section arranged sequentially from bottom to top along the side wall of the blade holder.

[0007] As described above, the first stirring section, the second stirring section, and the third stirring section are arranged circumferentially and uniformly around the rotation axis of the stirring blade.

[0008] As described above, the side profiles of the first stirring section, the second stirring section, and the third stirring section are all streamlined curves adapted to the direction of rotation.

[0009] As described above, the loosening section of the stirring blade has an upward-curving strip structure adapted to the direction of rotation.

[0010] As described above, at least one of the first stirring section, the second stirring section, and the third stirring section has a frustum-shaped cross-sectional area that gradually decreases from bottom to top.

[0011] As described above, the upper end of the mixing blade holder is a smooth hemispherical shape to prevent material accumulation.

[0012] As described above, the bottom of the first stirring part is flush with the bottom of the blade holder, and the upper end is provided with a first upper step and a second upper step, with a first transition slope between the first upper step and the second upper step. The bottom of the second stirring section is provided with a third lower step and a fourth lower step, and a second transition slope is provided between the third lower step and the fourth lower step. The upper end of the second stirring section is provided with a fifth upper step and a sixth upper step, and a third transition slope is provided between the fifth upper step and the sixth upper step. The bottom of the third stirring section is provided with a seventh lower step and an eighth lower step, and a fourth transition slope is provided between the seventh lower step and the eighth lower step.

[0013] A food waste disposer includes a mixing chamber, wherein mixing blades as described above are installed inside the mixing chamber. Compared with the prior art, the present invention has the following advantages: This invention features at least one upward-extending loosening section on the upper part of the mixing blade. As the mixing blade rotates, this loosening section continuously applies a lifting or tumbling force to the food waste located in the upper layer of the mixing chamber, which is normally difficult to process effectively. This forces the upper layer of material to break up and re-enter the core grinding and drying area at the bottom, thus achieving three-dimensional, three-dimensional circulating mixing of all materials within the mixing chamber. This improves the uniformity and thoroughness of food waste treatment, significantly shortens processing time, reduces energy consumption, and its structure is simple, ingenious, easy to implement, and yields significant improvements. [Attached Image Description] To more clearly illustrate the technical solutions in the embodiments of the utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of this embodiment. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this embodiment. Figure 2 ; Figure 3 This is an exploded view of the structure of this embodiment; Figure 4 This is a schematic diagram of the internal structure of this embodiment; Figure 5 This is an exploded view of the internal structure of this embodiment; Figure 6 for Figure 2 A sectional view along line AA. Figure 7 This is a schematic diagram of the internal structure of the stirring chamber in this embodiment; Figure 8 This is a schematic diagram of the three-dimensional structure of the stirring blade in this embodiment. Figure 1 ; Figure 9 This is a schematic diagram of the three-dimensional structure of the stirring blade in this embodiment. Figure 2 ; Figure 10 This is a three-dimensional structural diagram of the grinding tool in this embodiment; Figure 11 This is a side view of the grinding tool in this embodiment; Figure 12 This is a top view of the grinding tool in this embodiment.

Detailed Implementation Methods

[0017] Please see the appendix Figures 1 to 12 This embodiment provides a food waste disposer. The disposer first includes a base 1 for stable support of the entire unit. The base 1 is preferably made of high-density polymer injection molding or stamped metal sheet. On the base 1, a mounting base 2, serving as the core load-bearing component, is fixedly connected, along with an outer shell 3 to completely enclose the internal components. The mounting base 2 can be made of die-cast aluminum alloy or reinforced nylon (PA) material with high mechanical strength and good heat dissipation performance. It has pre-set reinforcing ribs, mounting holes, and accommodating chambers for installing various functional components. The outer shell 3 primarily serves a protective and aesthetic purpose and can be made of engineering plastics such as ABS or polypropylene (PP). It is detachably mounted on the base 1 and mounting base 2 using snap fasteners, screws, or other methods, facilitating subsequent assembly and maintenance.

[0018] The core functional unit of the food waste disposer in this embodiment is mainly integrated on the mounting base 2. Specifically, a mixing chamber 4 for containing, stirring, and grinding food waste is provided on the upper part of the mounting base 2. As a container that comes into direct contact with the material, the inner liner of the mixing chamber 4 can be integrally stretched and formed from corrosion-resistant, high-strength food-grade metal materials such as 304 stainless steel, or die-cast from aluminum alloy with a non-stick coating such as Teflon, to prevent food waste from adhering and to facilitate cleaning.

[0019] To achieve the drying process of kitchen waste, a heating plate 5 is tightly fitted to the bottom of the outer shell of the mixing chamber 4. The heating plate 5 is supported by a specific structure of the mounting base 2, and can integrate a PTC heating element or a resistance heating wire inside. It forms a good heat conduction path with the bottom of the mixing chamber 4 through a medium such as thermally conductive silicone grease, so as to ensure that heat can be efficiently and evenly transferred to the material in the mixing chamber 4.

[0020] The drive unit 6, which provides power to the entire machine, is installed in the bottom space of the mounting base 2. In this embodiment, the drive unit 6 can be a high-torque brushless DC motor with a built-in reduction gearbox. Its drive end, i.e., the output shaft after reduction, passes through the reserved through hole of the mounting base 2, the center hole of the heating plate 5, and the bottom shaft hole of the stirring chamber 4 from bottom to top through a precision shaft hole structure. The end of the drive end extends into the stirring chamber 4 and is reliably fixed to the stirring blade 7 by means of splines, pins, or threads, thereby transmitting torque and driving the stirring blade 7 to rotate at low speed and high torque.

[0021] On the cylindrical inner wall of the mixing chamber 4, one or more grinding blades 8 are provided, which cooperate with the rotating mixing blades 7. The grinding blades 8 are detachably connected to the inner wall of the mixing chamber 4 through a specific mounting structure, for example, by sliding into a dovetail groove and locking it with screws. When the mixing blades 7 rotate, the mixing structure on them pushes the material towards the fixed grinding blades 8, forming multiple grinding zones between them. This generates continuous and strong shearing, squeezing, and grinding action on the material, thereby crushing large pieces of kitchen waste into fine particles.

[0022] During the processing, heating generates a large amount of odorous water vapor and exhaust gas. To address this, a cleaning component 9 is provided on the upper side of the mixing chamber 4, which is directly connected to the inner cavity of the mixing chamber 4. This component is used to promptly remove and purify the wastewater and exhaust gas, thereby preventing the spread of odors and maintaining a clean working environment.

[0023] Specifically, to fundamentally solve the technical problem that the upper layer of food waste clumps and bridges due to gravity and viscosity during processing, preventing it from effectively participating in the circulation of the bottom grinding zone, this embodiment makes a key improvement to the structure of the stirring blade 7. Specifically, at least one upwardly extending loosening portion 71 is integrally formed or fixedly connected to the upper part of the stirring blade 7. The structural shape of the loosening portion 71 allows its inclined or curved working surface to generate a significant upward lifting force or inward tumbling force on the food waste located above the stirring blade 7, which was originally in a stationary or slowly moving state. This force can effectively break up any clumps that may form on the upper layer of the material, disperse the clumps of waste, and throw them back into the center or side of the mixing chamber 4, forcing them to participate in the overall macroscopic circulation of the material. In this way, it is ensured that all the material in the mixing chamber 4 from top to bottom can be uniformly heated, tumbled, and continuously fed into the core grinding zone at the bottom, thereby greatly improving the uniformity, thoroughness, and overall processing efficiency of the processing.

[0024] Furthermore, as a preferred embodiment, in order to achieve efficient stirring, grinding and loosening functions, the stirring blade 7 in this embodiment may be made of high-strength corrosion-resistant martensitic stainless steel or duplex stainless steel, and integrally formed by precision casting process to ensure its structural strength and service life in the long-term treatment of high-salt and high-acid kitchen waste environment.

[0025] Please see Figures 8 to 9 The stirring blade 7 includes a blade holder 72 serving as its base and connection foundation. The lower part of the blade holder 72 is provided with a connection portion adapted to the driving end of the driving device 6, for example, it can be an internal spline hole or a shaft hole with a keyway, to receive the output shaft of the driving device 6, thereby achieving a stable fixed connection capable of transmitting large torques. The loosening portion 71 can be integrally provided on one side of the upper part of the blade holder 72, and its shape can be a block-shaped or arm-shaped structure with a certain thickness and strength, extending upwards and to one side from the upper edge of the blade holder 72.

[0026] Along the side wall of the blade holder 72, three stirring sections, serving as the main grinding and stirring actuators, extend integrally from bottom to top: a first stirring section 73, a second stirring section 74, and a third stirring section 75. These three stirring sections are arranged in a stepped pattern and form the main structure for powerfully shearing, extruding, and grinding the material. Vertically, there is a predetermined vertical distance between the upper surface of the first stirring section 73 and the lower surface of the second stirring section 74, and between the upper surface of the second stirring section 74 and the lower surface of the third stirring section 75. The annular space formed by this vertical distance constitutes the grinding gap, which is used for functional cooperation with the fixed grinding blade 8. The height of this gap is precisely designed to ensure that the grinding blocks on the grinding blade 8 can be embedded within it, forming an optimal shearing surface with the two rotating stirring sections for material processing.

[0027] To ensure a stable and efficient mixing process, the first mixing section 73, the second mixing section 74, and the third mixing section 75 are circumferentially and uniformly arranged around the rotation axis of the mixing blade 7. Specifically, when viewed from above the mixing blade 7, i.e., when projected onto the radial plane of its central rotation axis, the first mixing section 73, the second mixing section 74, and the third mixing section 75 are circumferentially and uniformly arranged. In this embodiment, a preferred solution is to provide three independent mixing sections, which are evenly distributed at 120-degree angles in the top-view projection, forming a strictly centrally symmetrical configuration. This circumferentially uniform distribution design aims to achieve dynamic balance of the entire machine. When the mixing blade 7 rotates, even if each mixing section is subjected to slightly different material forces due to its different heights, the radial components of these forces can largely cancel each other out in the circumferential direction, thereby eliminating the radial excitation force that may be caused by mass eccentricity. This not only results in minimal vibration and lower noise during equipment operation but also greatly reduces the fatigue stress on the bearings of the drive unit 6 and the connection between the mixing blade 7 and the drive shaft, significantly improving the durability and service life of the entire machine.

[0028] Meanwhile, this combination of circumferentially evenly distributed and axially staggered layout creates a three-dimensional, multi-layered grinding and mixing zone. It ensures that there are no spatial dead zones in the processing of materials within the mixing chamber 4. During rotation, the mixing sections at different heights can effectively process materials at different levels, preventing vertical stratification or caking, promoting the circulation and exchange of materials between the upper and lower parts, thus achieving all-round, three-dimensional mixing and grinding, and ensuring the uniformity and consistency of the final output.

[0029] To further optimize mixing efficiency and reduce energy consumption, the side profiles of the first mixing section 73, the second mixing section 74, and the third mixing section 75, especially their working surfaces facing the direction of rotation, are designed as smoothly transitioning curves that adapt to the rotation direction of the mixing blades 7. This streamlined profile, compared to a simple planar or right-angled structure, significantly reduces fluid resistance when rotating in viscous materials, allowing the drive device 6 to use more energy for effective work rather than overcoming ineffective resistance. Simultaneously, this curved profile allows for gentler and more continuous material movement, avoiding ineffective impacts and slaps, enabling the material to form a stable and efficient macroscopic circulating flow field within the mixing chamber, thereby improving mixing and heat transfer efficiency.

[0030] For further details, please refer to the appendix. Figures 8 to 9 The loosening section 71 is shaped like a curved strip that adapts to the rotation direction of the stirring blade 7, with a significantly upward-curving end. The curved design reduces rotational resistance, while the upward-curving strip structure allows its inclined bottom surface to smoothly cut into the upper material like a wedge during rotation, while the upward-curving surface provides an upward-sloping guiding force to the material, thus smoothly and powerfully turning over, breaking up, and throwing the compacted upper material towards the central area. This specific geometry ensures that the loosening section 71 achieves maximum loosening and agitation of the upper material with minimal energy consumption.

[0031] As an optional implementation, at least one of the first stirring section 73, the second stirring section 74, and the third stirring section 75 has a cross-sectional area that gradually decreases from bottom to top, giving it an overall frustum or truncated cone-shaped structure with a specific angle, narrow at the top and wide at the bottom. When the frustum-shaped stirring section rotates in viscous, semi-solid materials such as kitchen waste, its inclined sidewalls act like a continuous, spiraling wedge-shaped ramp. This structure can exert a significant, upward-pushing force along the ramp on the material drawn into its bottom. This forced vertical conveying from bottom to top effectively breaks the tendency of materials to only make simple circular motions in the horizontal plane, and combined with the material's own gravity settling effect, it generates a strong three-dimensional tumbling and convection mixing effect throughout the mixing chamber 4. It can continuously convey the fine materials that have been preliminarily ground at the bottom upwards, while simultaneously drawing the large, insufficiently processed materials downwards into the core grinding zone, thereby greatly improving the uniformity of mixing and fundamentally avoiding material stratification and caking.

[0032] Furthermore, this gradually narrowing structure from bottom to top, when combined with the fixed grinding blades 8, can form a converging grinding channel. As the material is pushed upwards, it is forcibly squeezed into the gradually narrowing gap between the mixing section and the grinding blades 8, thus experiencing stronger compressive and shear stresses. This improves the uniformity of mixing while also enhancing the efficiency and thoroughness of grinding.

[0033] Furthermore, to fundamentally eliminate the ineffective accumulation of kitchen waste during processing, the upper end of the blade holder 72 has been specially optimized in terms of geometry, preferably designed as a smooth hemisphere without any platforms or depressions. The technical starting point of this design is that kitchen waste is, in most cases, a mixture with complex composition, high viscosity, and poor flowability. In traditional mixing devices, the flat or complex-shaped area at the top of the rotating central shaft is prone to becoming a "dead zone" for mixing. Once the material falls into this area, due to the lack of effective radial or axial driving force, it will quickly adhere and accumulate, gradually forming a "plume" that rotates synchronously with the mixing blades 7 and no longer participates in effective grinding. This "plume" not only occupies the effective volume of the mixing chamber 4 and reduces processing efficiency, but also becomes a source of bacterial growth and odor due to the lack of sufficient processing over a long period of time, while also greatly increasing the difficulty of cleaning for the user.

[0034] To achieve the ultimate crushing and grinding effect on kitchen waste, especially the flexible fibers such as vegetable leaves, elastomers such as meat skin, and hard bones contained therein, the surfaces of each stirring part in this embodiment are designed with a complex shape and a specific topological structure. This aims to create multiple continuous and efficient shearing, compression, and tearing force fields at the microscopic level through the precise coordination of moving and stationary components. Specifically, the upper end of the first stirring part 73 has a first upper step 731 and a second upper step 732, which are connected by a first transition slope 733. The bottom of the second stirring part 74 has a third lower step 741 and a fourth lower step 742, which are connected by a second transition slope 743; its upper end has a fifth upper step 744 and a sixth upper step 745, which are connected by a third transition slope 746. The bottom of the third stirring part 75 also has a seventh lower step 751 and an eighth lower step 752, which are connected by a fourth transition slope 753. The combination of these multiple steps and slopes allows the mixing part to form an extremely complex shearing, squeezing and tearing force field between its surface and the grinding blade 8 when it rotates, thus enabling it to process kitchen waste of various complex components.

[0035] Furthermore, to address the complex odorous gases inevitably generated during the high-temperature processing of kitchen waste—gases containing large amounts of water vapor, grease aerosols, and volatile organic compounds—the cleaning component 9 of this embodiment includes an outlet 91 located in the upper part of the inner cavity of the mixing chamber 4. This outlet 91 is connected to a collection box 93, serving as a primary processing unit, via a high-temperature, corrosion-resistant gas pipe 92. The collection box 93 is integrated into the mounting base 2, positioned adjacent to but with appropriate thermal insulation from the high-temperature mixing chamber 4. This arrangement aims to utilize temperature difference for condensation and dehumidification: when the high-temperature, highly saturated, humid gas from the mixing chamber 4 is introduced into the relatively cooler, larger-volume collection box 93, its temperature rapidly drops below the dew point, causing most of the water vapor to condense into liquid water, adhering to the inner wall of the collection box 93 and collecting at the bottom. This process not only greatly reduces the humidity of the gas, but more importantly, many water-soluble odor-causing substances such as ammonia, hydrogen sulfide, and some oil aerosols are also captured and dissolved in the condensate, achieving the initial separation of pollutants.

[0036] To further treat fine particulate matter and some stubborn odor molecules that are difficult to remove by condensation suspended in the air, a negative ion generator 94 is also built into the internal space of the collection box 93. When the generator is working, it releases a large number of negative ions into the airflow. These negative ions can actively attach to positively charged suspended particles, causing them to agglomerate into larger clusters, and then settle to the bottom of the collection box 93 by gravity, and be discharged with the condensate. At the same time, the high concentration of negative ions also has a certain oxidative decomposition or neutralization effect on some organic odor molecules, achieving secondary purification of the gas.

[0037] To ensure stable and efficient airflow throughout the purification system along a preset path, and to maintain a slight negative pressure inside the mixing chamber 4 to prevent odors from escaping through other gaps, a negative pressure fan 96, serving as the system's power source, is connected to one side of the collection box 93. This fan is preferably a centrifugal or turbine fan to provide sufficient static pressure to overcome the flow resistance of the entire air path. It continuously draws the condensed and negative ion-treated gas from the collection box 93.

[0038] The gas drawn out by the negative pressure fan 96 is connected via a pipe to a purification chamber 97, mounted on the outer casing 3, which serves as the final deep purification unit. The interior of the purification chamber 97 can be a replaceable filter cartridge or filter box structure, filled with highly efficient physical adsorption materials, such as activated carbon. When the gas passes through the activated carbon layer, residual volatile organic compounds and other odor-causing molecules that cannot be removed by the first two stages of treatment are adsorbed by the activated carbon. Finally, the clean air, after being treated by the purification process, is discharged into the external environment through the final exhaust port of the purification chamber 97. This ensures that the food waste disposer can achieve thorough purification of exhaust pollutants while operating efficiently.

[0039] Furthermore, the drainage assembly 95 includes a water outlet at the bottom of the collection tank 93, which is connected to a water outlet pipe 951. The water outlet pipe 951 extends toward the base 1 and connects to a drain section 952 that ultimately discharges wastewater to the outside. The drain section 952 is preferably located on one side of the edge of the base 1 for easy connection to an external drain pipe. More specifically, the drain section 952 includes a receiving end connected to the water outlet pipe 951 and a drain end for drainage. A stop plug 953 is detachably connected to the drain end. The stop plug 953 is preferably made of silicone or thermoplastic elastomer (TPE) material with good elasticity and sealing properties. Its plug portion forms an interference fit with the inner hole of the drain end, achieving a reliable seal through friction. When drainage is needed, the user can easily pull it out; after drainage, it can be reinserted. In some other alternative embodiments, the stop plug 953 can also be replaced with a miniature ball valve or a rotary switch to achieve the same water-stopping function.

[0040] Furthermore, to ensure the reliable and safe deployment of the negative ion generator 94 within the collection box 93, while also considering ease of production assembly and feasibility of subsequent maintenance, a negative ion drive board 931—a printed circuit board housing precision electronic components such as a boost circuit and control chip—is installed on the external dry side of the collection box 93. This board provides high-voltage drive power to the negative ion generator 94. It can be fixed to the outer wall of the collection box 93 using screws, clips, or adhesives, thus protecting it from the corrosive effects of high humidity and condensation inside the box and ensuring the long-term stability and safety of the electrical system.

[0041] Correspondingly, the negative ion generator 94, which needs to directly act on the airflow inside the chamber, is installed through a mounting hole 932 on the inner wall of the collection chamber 93, adjacent to the negative ion drive plate 931. The mounting hole 932 is precisely sized to fit the body of the negative ion generator 94, and a sealing flange or O-ring can be installed on the negative ion generator 94 to form a circumferential, airtight, and watertight pressure seal with the edge of the mounting hole 932 during installation, preventing moisture leakage or external air infiltration. This is achieved by symmetrically providing dedicated wiring holes 933 on both sides of the mounting hole 932. During assembly, the power supply wires from the external negative ion drive plate 931 pass through these two wiring holes 933 and are then connected to the electrode pins of the negative ion generator 94 located inside the collection chamber 93. Optionally, to ensure absolute sealing of the wiring holes 933, they can be filled with epoxy resin for potting or fitted with rubber sealing sleeves.

[0042] Furthermore, in this embodiment, the main body of the grinding tool 8 is a mounting plate 81 serving as its mounting and support base. This mounting plate 81 is preferably made of a metal material such as 304 stainless steel that is compatible with the inner wall material of the mixing chamber 4 and has sufficient rigidity. Its basic shape is constructed as an arc-shaped panel that can fit snugly against the cylindrical inner wall of the mixing chamber 4. This ensures that after installation, it becomes an integral part of the inner wall of the mixing chamber 4 without creating unnecessary gaps or dead angles. The mounting plate 81 is detachably connected to the inner wall of the mixing chamber 4 through a specific mechanical structure, allowing the user or maintenance personnel to easily disassemble and replace the grinding tool 8, which is a consumable part, after long-term wear and tear, without replacing the entire mixing chamber 4, greatly reducing long-term maintenance costs.

[0043] On the side of the mounting plate 81 facing the center of the mixing chamber 4, a first grinding block 82 and a second grinding block 83, serving as the main grinding execution structure, are integrally provided. The first grinding block 82 is located at the lower part of the mounting plate 81, while the second grinding block 83 is located directly above the first grinding block 82. The two maintain a preset distance in the vertical direction, together forming a multi-layered, three-dimensional fixed grinding area.

[0044] Crucially, in order to achieve efficient shearing and engagement at the microscopic level with the rotating stirring blade 7, which also has a complex stepped surface, the side sections of the first grinding block 82 and the second grinding block 83, i.e., the sections perpendicular to their length direction, are both designed to have one or more steps.

[0045] This results in each grinding block's surface no longer being a single plane or curved surface, but rather composed of multiple alternating horizontal and vertical surfaces. The technical advantages are: Firstly, it forms a fixed shearing edge; the outer corner edge of each step constitutes a sharp, fixed shearing edge. When the rotating stirring part sweeps past it, the material is forced to undergo intense shearing action in the tiny gap formed between this cutting edge and the edge of the rotating stirring part, which is particularly effective for processing highly flexible food fibers.

[0046] Secondly, a high-pressure grinding zone is constructed, and the horizontal surface of each step forms a high-pressure grinding platform. When the material is pushed into this area by the rotating mixing part, it is forced into the narrow space between the platform and the surface of the rotating mixing part, and subjected to strong grinding and kneading forces. This is particularly effective for processing materials with hard shells or granular structures.

[0047] Furthermore, to further enhance grinding capabilities, as shown in the attached... Figures 10 to 12 As shown, on both sides of the first grinding block 82 and the second grinding block 83, i.e., on their working surfaces facing the rotating stirring blade 7, continuous, arrayed first protruding teeth 821 and second protruding teeth 831 are integrally machined or provided. The impact of these protruding teeth gives the originally relatively smooth sidewalls of the grinding blocks a grinding surface like a file or saw teeth. When the material passes through these protruding teeth under the pushing of the rotating stirring part, it is not only subjected to shearing and crushing, but also to the dense scraping, tearing, and combing effects brought about by the array of protruding teeth. This combined force has an irreplaceable effect on the rapid decomposition of flexible materials such as plant fibers and tendons, as well as the efficient local stress concentration crushing of hard materials such as small pieces of bone and fruit pits.

[0048] Furthermore, as an optional implementation, the individual shape of the first protrusion 821 and / or the second protrusion 821 is designed as a transverse frustum shape. Specifically, the narrow end face (frustum end) of the protrusion of this frustum structure faces the direction of rotation of the stirring blade 7, while its wide end face (frustum bottom) is connected to the base of the grinding block. This specific shape, narrow on the outside and wide on the inside, enables it to produce a series of precisely designed composite mechanical effects when interacting with materials. Its narrow end face, which is the smallest in size and faces the direction of material movement, can generate huge pressure in a very small contact area. When the rotating stirring part pushes the material towards the narrow end face, it can easily penetrate and tear the internal structure of the material, especially for highly tough fibrous or flaky waste such as vegetable leaves and meat skin, which can play a highly efficient role in breaking down and decomposing the cell walls. The two inclined side faces that smoothly transition from the narrow end face to the wide end face constitute a pair of guiding shear surfaces. After being split by the narrow end face, the material is forced to separate and slide along the two inclined planes, and is subjected to continuous shearing force, similar to the cutting of scissors, during the sliding process. This design transforms a one-time impact into a continuous, guided shearing process, greatly improving energy utilization efficiency.

[0049] Furthermore, the first grinding block 82 and the second grinding block 83 are arranged parallel to each other in the vertical direction. This parallel arrangement ensures that they form a uniform grinding gap of equal height with the rotating stirring part, which also has a parallel surface, thereby ensuring that the material is treated consistently throughout the grinding zone and avoiding differences in grinding effect caused by uneven gaps.

[0050] Furthermore, as an optional implementation, the projected area of ​​the upper second grinding block 83 relative to the bottom of the mixing chamber 4 is designed to be smaller than that of the lower first grinding block 82 relative to the bottom of the mixing chamber 4. The larger, lower first grinding block 82 constitutes the main grinding zone, which can withstand the initial and strongest impact force from the large pieces of material at the bottom and perform coarse crushing; the smaller second grinding block 83 constitutes the secondary fine grinding zone, which mainly processes the material that has become smaller after the first stage of grinding. This hierarchical layout not only makes the grinding process more layered and efficient, but also naturally forms an inward guiding contour from bottom to top, which helps to prevent material from accumulating in the upper part of the grinding zone and guides it to circulate downwards, optimizing the macroscopic flow of material in the entire mixing chamber.

[0051] Furthermore, as an optional implementation, both the first grinding block 82 and the second grinding block 83, relative to their fixed mounting plate 81, exhibit a continuous and monotonically decreasing trend in cross-sectional width from the proximal end (root) connected to the mounting plate 81 to the distal end (end) extending towards the center of the mixing chamber 4. This dimensional gradient causes it to appear in a planar projection as an asymmetrical trapezoidal or essentially triangular configuration with a wide proximal end as its base, narrowing outwards to a smaller distal end. This specific topology functionally constructs a wedge-shaped, intensity-gradient fixed grinding zone. When the rotating mixing unit pushes the material tangentially to the grinding block, the material first contacts the smallest distal end. Due to the small contact area, extremely high local pressure can be generated at this point, thus producing an initial and efficient destructive effect on the material structure. As the material is continuously pushed by the mixing unit, it is forced to slide along the converging inclined sides of the grinding block towards its proximal end, and the channel space occupied by the material flow is continuously compressed. This process effectively transforms the input tangential motion into continuously increasing normal compressive and shear stresses perpendicular to the hypotenuse of the grinding block. By constructing a continuously varying stress field in space, this design achieves efficient energy transfer from the rotating components to the processed material, ensuring that the material undergoes a complete processing cycle from initial fracturing to final high-intensity grinding along a single path.

[0052] Furthermore, in this embodiment, a first gap L1 is provided between the bottom of the first grinding block 82 and the bottom of the mounting plate 81 for the first stirring part 73 to rotate. A second gap L2 is provided between the upper end of the first grinding block 82 and the bottom end of the second grinding block 83 for the second stirring part 74 to rotate. Through these two reserved gaps, the rotating stirring part and the fixed grinding block have sufficient space to achieve efficient shearing and grinding. It should be noted that since the grinding tool 8 in this embodiment only includes the first grinding block 82 and the second grinding block 83, the uppermost third stirring part 75 mainly stirs and mixes in the open space above the second grinding block 83, and does not form a grinding gap with a specific geometric definition with it.

[0053] Furthermore, as an optional implementation, the stepped profile of the first grinding block 82 includes an outward-facing first bend 822 and a second bend 823 facing the mounting plate 81. Similarly, the second grinding block 83 also includes an outward-facing third bend 832 and a fourth bend 833 facing the mounting plate 81. In a preferred embodiment, the bend angles of these four bends can be designed to be equal, and the bend angle range is 120 degrees to 160 degrees. This specific range of obtuse angles is not arbitrarily chosen, but is based on technical considerations of balancing grinding efficiency, structural strength, and service life. If the bend angle is less than 90 degrees, although it may provide an extremely sharp shearing edge in the initial stage, when processing hard particles commonly found in food waste, this sharp angle is prone to chipping or rapid wear due to stress concentration, resulting in a sharp decline in performance in a short period of time. If the bend angle is too large, approaching 180 degrees, the turning point will degenerate into a near-planar structure, essentially losing its function as a shearing edge. It will be unable to effectively cut flexible materials or form an effective extrusion chamber, thus significantly reducing grinding efficiency. Therefore, an obtuse angle range of 120 to 160 degrees is the optimal range for effective shearing while ensuring sufficient structural strength in the turning point. This angle allows the rotating stirring section to push the material forward, creating a combined force of shearing and wedging extrusion. Preferably, the four turning points have bend angles of 150 degrees. At this angle, the shearing action of the turning point on the material and the extrusion action guiding it into the grinding chamber achieve the best synergistic effect, ensuring the highest overall grinding efficiency and the longest component lifespan while maintaining the lowest energy consumption.

[0054] Furthermore, an insertion slot for accommodating the mounting plate 81 is integrally formed on the inner wall of the mixing chamber 4 by means of a mold or by subsequent precision machining. The inner base surface of this insertion slot is constructed as an arc-shaped surface with a preset radius of curvature, concentric with the inner wall of the mixing chamber 4. Correspondingly, the side end face of the mounting plate 81 facing the insertion slot is also precisely machined into an arc-shaped surface with the same radius of curvature, conformally matching it. During assembly, the arc-shaped surface of the mounting plate 81 can slide into the arc-shaped base surface of the insertion slot with a very small gap. This large-area surface-to-surface contact not only provides extremely stable, wobbly radial support for the mounting plate 81, but more importantly, the side wall of the insertion slot constitutes a rigid circumferential limit, capable of withstanding and offsetting the huge tangential torque generated during the grinding process and acting on the grinding tool 8, fundamentally eliminating the possibility of rotation or displacement.

[0055] Furthermore, to prevent the mounting plate 81 from dislodging from the insertion slot when subjected to vertical impact from materials or equipment vibration, a first mounting hole 41 is provided at a specific position on the upper part of the insertion slot as a positioning reference. Correspondingly, a second mounting hole 811 is also provided on the upper part of the mounting plate 81, which can be perfectly coaxially aligned with the first mounting hole 41 when it is fully and correctly inserted into the insertion slot. During final fixing, a standard fastener, such as a stainless steel countersunk hexagonal screw, is screwed through the first mounting hole 41 and into the threaded second mounting hole 811, firmly pressing the mounting plate 81 against the base surface of the insertion slot, eliminating any possible minor gaps and providing strong axial locking.

[0056] The working process of this utility model is as follows: After kitchen waste is put into the mixing chamber 4, the drive device 6 is started, driving the mixing blades 7 to rotate. Under the coordinated action of the mixing blades 7 and the grinding blades 8, the waste material is continuously mixed, cut, squeezed and ground. At the same time, the loosening section 71 turns down the upper layer of material to ensure that there are no dead corners in the processing. The heating plate 5 heats and dries the material, and the water vapor and exhaust gas generated are extracted by the cleaning component 9 and discharged after condensation and purification.

[0057] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A stirring blade for a food waste disposer, characterized in that, It includes a blade holder (72) used as a mounting base and adapted to be connected to a drive source. The upper part of the blade holder (72) is provided with a loosening part (71) for lifting or stirring the upper layer of kitchen waste. At least one stirring unit for stirring and grinding kitchen waste is provided along the side wall of the blade holder (72).

2. The stirring blade according to claim 1, characterized in that, The stirring unit includes a first stirring section (73), a second stirring section (74) and a third stirring section (75) arranged sequentially from bottom to top along the side wall of the blade holder (72).

3. The stirring blade according to claim 2, characterized in that, The first stirring section (73), the second stirring section (74) and the third stirring section (75) are arranged circumferentially around the rotation axis of the stirring blade.

4. The stirring blade according to claim 2, characterized in that, The side profiles of the first stirring section (73), the second stirring section (74) and the third stirring section (75) are all streamlined curves adapted to the direction of rotation.

5. The stirring blade according to claim 1, characterized in that, The loose portion (71) has an upward-curving strip structure adapted to the direction of rotation.

6. The stirring blade according to claim 2, characterized in that, At least one of the first stirring section (73), the second stirring section (74) and the third stirring section (75) has a frustum-shaped cross-sectional area that gradually decreases from bottom to top.

7. The stirring blade according to claim 1, characterized in that, The upper end of the cutter holder (72) is a smooth hemispherical shape to prevent material accumulation.

8. The stirring blade according to claim 2, characterized in that, The bottom of the first stirring part (73) is flush with the bottom of the knife holder (72), and the upper end is provided with a first upper step (731) and a second upper step (732). A first transition slope (733) is provided between the first upper step (731) and the second upper step (732). The bottom of the second stirring part (74) is provided with a third lower step (741) and a fourth lower step (742), and a second transition slope (743) is provided between the third lower step (741) and the fourth lower step (742). The upper end of the second stirring part (74) is provided with a fifth upper step (744) and a sixth upper step (745), and a third transition slope (746) is provided between the fifth upper step (744) and the sixth upper step (745). The bottom of the third stirring section (75) is provided with a seventh lower step (751) and an eighth lower step (752), and a fourth transition slope (753) is provided between the seventh lower step (751) and the eighth lower step (752).

9. A food waste disposer, comprising a mixing chamber (4), characterized in that, The stirring chamber (4) is equipped with a stirring blade as described in any one of claims 1 to 8.

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