Chopping machine capable of strengthening meat and control method

Abstract

The invention relates to a chopping machine capable of strengthening meat. The chopping machine comprises a stirring cup body, a main machine cover body, a stirring knife group and a circuit board assembly, the stirring knife group is arranged on the main machine cover body and extends into the stirring cup body, one side is an unsealed knife edge for chopping, and the other side is an unsealed knife back; the circuit board assembly is arranged on the main machine cover body and can control the stirring cutter set to rotate forwards and backwards, and the circuit board assembly is further provided with a current detection module and a controller and can receive detected working current of a motor in the stirring cutter set. The controller judges the food material category according to the working current, determines the cutting edge cutting target time, and controls the motor to rotate reversely after the target time, so that the food is stirred by the knife back. According to the design, a traditional single cutting mode is changed, excessive chopping is avoided, the fiber structure of meat is reserved, the chewiness and taste are improved, the requirement for making meatballs and other dishes needing the chewy taste is met, accurate operation can be conducted according to the actual condition of the meat, and the time control accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a meat mincing machine capable of adding toughness to meat and a control method. BACKGROUND

[0002] In the field of kitchen small household appliances, electric mincing machines (or food processors, meat grinders) have been widely used to process meat into minced meat. Traditional mincing machines usually use high-speed rotating sharp blades to cut and stir meat in one direction continuously. Although this working method is efficient, it has a significant disadvantage: the processed minced meat is too fine, with a texture close to meat paste, completely destroying the original fiber structure of the meat, resulting in loss of chewiness and elasticity, and poor mouthfeel, which cannot meet the needs of dishes such as meatballs, meat pies, and wonton fillings that require to retain "toughness" mouthfeel.

[0003] To solve the above problems, some improvement schemes have appeared in the prior art. For example, some schemes control the mincing degree by setting an intermittent working pulse driving mode to avoid over-mincing. However, this method can only roughly control the total mincing time and cannot intelligently judge the actual state of the meat (such as type, quantity, and initial temperature), and the single cutting action still cannot simulate the manual "pounding and beating" process effect. Another similar implementation scheme is to use double-blade sets or special-shaped blades to improve the rolling path of food to improve the mincing uniformity, but its core function is still mincing and does not involve post-mincing stirring and toughening processing aimed at increasing toughness. SUMMARY

[0004] The purpose of the present application is to disclose a meat mincing machine capable of adding toughness to meat and a control method, which can automatically complete the whole process of "mincing first and stirring and toughening later", thereby significantly improving the final mouthfeel of meat food.

[0005] To achieve the above purpose, the present application discloses a meat mincing machine capable of adding toughness to meat, comprising: a stirring cup body having an opening; a main machine cover body covering the opening; a stirring blade set arranged in the main machine cover body and extending into the stirring cup body, one side of the stirring blade set being an unsealed blade edge for mincing, and the other side being an unsealed blade back; a circuit board assembly arranged on the main machine cover body and controlling the stirring blade set to rotate forward or reverse, the circuit board assembly being provided with a current detection module and a controller, the controller receiving the working current of the motor in the stirring blade set detected by the current detection module; wherein the controller is configured to: determine the type of food material according to the working current and determine the target working time of the blade edge mincing, and control the motor to reverse after the target time to make the blade back stir the food.

[0006] By adopting the above scheme, one side of the mixing blade assembly consists of an opened blade for chopping, while the other side is an unopened blade back. The circuit board assembly controls the forward or reverse rotation of the mixing blade assembly. First, the blade rotates forward to chop, then the motor is controlled to rotate in reverse, causing the blade back to stir the food. This changes the traditional single-cutting method, avoiding over-chopping that results in overly fine minced meat. It retains a certain fibrous structure in the meat, improving its chewiness and texture, meeting the needs of making meatballs, meat pies, wonton fillings, and other dishes that require a chewy texture. The controller can determine the type of food based on the working current and determine the target chopping time for the blades, enabling precise operation based on the actual condition of the meat and improving the accuracy of time control.

[0007] Furthermore, the stirring cup is a reverse-sloping cup, and the cup wall of the stirring cup includes a reflux section and a rounded corner section in the vertical direction from top to bottom. The reflux section is inclined from top to bottom away from the central axis of the cup, with an inclination angle of 1°-8°. The stirring blade assembly is a suspended blade assembly, including a lower blade assembly and an upper blade assembly. The blade of the lower blade assembly is inclined upward and points towards the connection between the reflux section and the rounded corner section.

[0008] By adopting the above scheme, during the mixing process, the ingredients are more easily moved upwards along the reflux section by centrifugal force, and then fall back to the center of the cup, making full contact with the mixing blades. The lower blades are angled upwards and point towards the junction of the reflux section and the rounded corner section, which better captures the falling ingredients and chops them evenly, avoiding over-chopping in some areas and under-chopping in others. The reverse-angled cup design helps the ingredients circulate. Under the stirring action of the blade backs, the ingredients will tumble and mix in an orderly manner along the special shape of the cup wall, allowing the meat fibers to better interweave and stretch, significantly mimicking the effect of manual pounding and strengthening, thereby improving the texture and mouthfeel of the meat. The upper and lower blades work together to further enhance the mixing force and uniformity of the ingredients, making the strengthening process more thorough.

[0009] Furthermore, the blade of the lower blade assembly is composed of a horizontal part and a bent part, and the included angle between the bent part and the horizontal part is in the range of 18°-28°.

[0010] By employing the above-mentioned design, the bent section forms a certain angle with the horizontal section, allowing the bent section to apply additional pressure to the food like a lever when the blade rotates and cuts it. When the blade contacts meat or other ingredients, the horizontal section performs initial cutting, while the bent section further compresses and tears the food fibers during rotation. Compared to a single horizontal blade, this method cuts meat fibers more effectively, improving chopping efficiency and making the chopping process easier and faster. During the mixing and strengthening stage, the bent section of the blade can better tumble the food within the mixing bowl. As the blade rotates, the bent section acts like a shovel, lifting the food from the bottom and creating a vertical circulation. This tumbling action helps the food mix thoroughly, allowing the meat fibers to better interweave and stretch, significantly mimicking the effect of manual pounding and strengthening, thereby improving the texture and mouthfeel of the meat.

[0011] Furthermore, the mixing cup body has an inner layer inside the cup wall, and the inner layer is filled with a refrigeration medium for preservation.

[0012] By employing the above solution, during the chopping and mixing process, meat ingredients come into full contact with air and the mixing blades, making them prone to spoilage due to oxidation and microbial growth. The cooling medium within the interlayer absorbs heat from the container, lowering the internal temperature and creating a low-temperature environment for the meat. This low temperature inhibits microbial growth and reproduction, slows down oxidation, and effectively extends the freshness of the meat, ensuring that the processed meat filling maintains good quality and taste for a longer period. High temperatures accelerate the loss of nutrients in meat, such as vitamins and proteins. The low-temperature environment provided by the cooling medium reduces the decomposition and destruction of nutrients, maximizing the preservation of the meat's nutritional value. This is significant for users who value healthy eating and the original flavor of ingredients, resulting in meatballs, meat pies, and other foods that are not only delicious but also more nutritious. When making meatballs or meat pies, there's no need to thaw the meat before processing; it can be chopped and mixed directly within the mixing container, integrating food storage and processing, greatly improving kitchen efficiency and convenience.

[0013] Furthermore, it also includes a base, the top of which is provided with a placement cavity for accommodating and fixing the stirring cup, and the bottom of which is provided with a suction cup filled with sound-insulating material; the stirring cup is connected to the base by a snap-fit ​​structure, or the stirring cup is snap-fit ​​connected to the main unit cover.

[0014] By adopting the above solution, a placement cavity is provided at the top of the base to accommodate and fix the mixing cup, providing a precise positioning space for the mixing cup. Once the mixing cup is placed in the placement cavity, its position is accurately defined, preventing the mixing cup from shaking or shifting due to strong centrifugal force when the mixing blades rotate at high speed to chop and bind the meat. This stable fixing method ensures smooth mixing, avoiding problems such as food splashing and uneven mixing caused by cup shaking, thus improving the quality of food processing. When the chopper is working, the suction force generated by the suction cups and the fixing effect of the placement cavity on the mixing cup work together to form a stable support system. Even during vigorous mixing and binding operations, the entire device remains firmly fixed to the table, preventing tipping or movement, greatly enhancing the safety of the equipment. In addition to the shock absorption and noise reduction effect of the suction cups, the design of the placement cavity also reduces noise generation to a certain extent. The mixing cup is securely placed in the placement cavity, reducing friction and collision with the surrounding air, thus lowering aerodynamic noise. The mixing cup is connected to the base via a snap-fit ​​structure, or the mixing cup is connected to the main unit cover via a snap-fit ​​structure. This connection method is simple and convenient to operate. When it is necessary to disassemble the mixing cup for cleaning or replacement, the snap-fit ​​can be easily released, and the mixing cup can be quickly removed, which greatly saves time and effort and improves efficiency.

[0015] Furthermore, the placement cavity is provided with a boss, and the boss is provided with a slot; the bottom of the stirring cup is provided with a groove that matches the boss, and the groove is provided with a protrusion that matches the slot; the slot and / or the protrusion are provided with magnets that attract each other.

[0016] By adopting the above solution, the protrusion inside the placement cavity matches the groove on the bottom of the cup, providing precise positioning for the mixing cup. When the user places the mixing cup on the base, the protrusion naturally embeds into the groove, ensuring the mixing cup is accurately positioned. Magnets attracting each other are placed on the slots and / or protrusions, providing additional suction for the connection between the mixing cup and the base. When placing the mixing cup, the user simply aligns the groove with the protrusion and gently lowers it for initial positioning. The magnetic attraction further simplifies the installation process; as the mixing cup approaches the base, the magnets automatically attract the protrusion into the slot, achieving a quick and accurate connection without complex adjustments or operations by the user. Because the shapes and sizes of the protrusions, grooves, slots, and protrusions are matched, these components can only fully engage when the mixing cup is correctly placed. This design effectively prevents equipment damage or malfunctions caused by incorrect installation. Meanwhile, the magnetic attraction also provides users with noticeable feedback during installation. When they hear a "click" or feel the magnet's attraction, they can confirm that the mixing cup has been correctly installed, further improving the accuracy and convenience of installation.

[0017] A control method for a meat chopper includes the following steps: S1: The operator sets a chopping mode corresponding to the type of food and the final shredded form; the motor is started, and the blade assembly is controlled to rotate in a first direction for a first predetermined time, wherein the blades of the mixing blade assembly act on the food to chop it; S2: During the first predetermined time, the operating current of the motor is detected; S3: Based on the operating current, the type of food is determined and a target working time for the blade assembly to rotate in the first direction is determined; S4: When the target working time is reached, the motor is controlled to reverse, driving the mixing blade assembly to rotate in a second direction opposite to the first direction for a second predetermined time, wherein the back of the mixing blade assembly acts on the food to mix and strengthen it.

[0018] By adopting the above-mentioned scheme, and setting the chopping mode according to the characteristics and expected shape of the ingredients, the blade assembly can chop at an appropriate speed and force, ensuring that different ingredients achieve the ideal degree of chopping. For example, meat can be chopped into uniform cubes or minced meat, preparing it for subsequent mixing and strengthening. The mixing method of the back of the blade differs from that of the blade; it simulates the effect of manual pounding, causing the meat fibers to intertwine, increasing the elasticity and toughness of the meat, resulting in meatballs, minced meat, and other foods with better texture and a chewier consistency. Different ingredients have different hardness and toughness, and the resistance that the motor needs to overcome when chopping these ingredients also varies, resulting in differences in the operating current. For example, the operating current of the motor will be significantly different when chopping tough beef and soft pork. By detecting the operating current, the chopper can automatically identify the type of ingredient, eliminating the need for manual selection by the operator and improving the intelligence of the equipment. The operator only needs to set the chopping mode; subsequent operations such as chopping, identifying the type of ingredient, determining the target working time, and mixing and strengthening are all automatically completed by the chopper. This one-button or simple setup greatly simplifies the operation process and reduces the difficulty of operation, allowing even inexperienced users to easily use the chopper to process ingredients.

[0019] Further, in step S2, detecting the operating current of the motor specifically involves: the detection of the motor's operating current and the determination of the motor's operating time are controlled by a microcontroller; the output port of the microcontroller is connected to a transistor, and the conduction and cutoff of the transistor drive a thyristor; the thyristor is connected to the motor; the voltage detection port of the microcontroller is connected to the circuit connected to the motor, and the operating current of the motor is detected by acquiring the reading of the voltage detection port and calculating the magnitude of the current flowing through the motor.

[0020] By adopting the above scheme, the microcontroller possesses high-precision analog-to-digital conversion (ADC) functionality. Its voltage detection port is connected to the circuit linking the motor, enabling accurate acquisition of voltage readings. Compared to some simple current detection methods, this direct voltage reading approach avoids inaccurate detection caused by interference and accumulated errors in the circuit. This provides a reliable data foundation for subsequent accurate calculation of the motor's operating current, reflecting the motor's operating current in real time and accurately, thus providing a precise basis for determining the type of food and the target working time. The microcontroller can flexibly control the conduction angle of the thyristor according to different working requirements and the detected motor current, thereby achieving precise adjustment of the motor speed and power. For example, when chopping foods of different hardness, the microcontroller can adjust the motor speed in a timely manner based on changes in the motor's operating current, ensuring the uniformity and stability of the chopping effect. The microcontroller integrates various anti-interference circuits and algorithms, effectively suppressing the influence of external factors such as electromagnetic interference and power fluctuations on the detection signal. The drive circuit composed of transistors and thyristors has high reliability and stability.

[0021] Further, in step S2, detecting the operating current of the motor specifically involves: detecting the voltage across the sampling resistor connected in series with the motor, and calculating the operating current based on the voltage and the resistance value of the sampling resistor; detecting and calculating the average value of the operating current multiple times within the first predetermined time period, and using the average value as the basis for judgment.

[0022] By employing the above scheme, the operating current flowing through the motor can be accurately calculated by detecting the voltage across the sampling resistor connected in series with the motor and combining this with the known resistance value, based on Ohm's law. Multiple measurements and averaging effectively smooth out these instantaneous fluctuations, reducing the impact of random errors and ensuring that the obtained current value more accurately reflects the motor's average operating state over that time period. Continuously detecting the motor's operating current within a predetermined time period allows for real-time capture of dynamic changes in the motor current. The current detection circuit design based on the sampling resistor is relatively simple, requiring no complex signal conditioning or interface circuits. This simplified circuit design not only reduces the number of electronic components and lowers hardware costs but also simplifies circuit board layout and wiring, reducing manufacturing difficulty and costs.

[0023] Furthermore, before the end of the motor's working time, step S31 is included: repeatedly detecting the magnitude of the motor's working current; comparing the magnitudes of the earlier working current and the later working current; if the earlier working current is greater than the later working current, determining that the shredder is working normally; if the earlier working current is less than or equal to the later working current, determining that the shredder is working abnormally.

[0024] By adopting the above method, during the normal food chopping process, the load on the motor typically exhibits a certain changing pattern as the food is gradually chopped. Generally, in the initial chopping stage, the food is larger and harder, requiring the motor to overcome greater resistance, resulting in a higher operating current. As chopping progresses, the food becomes smaller and finer, the motor load decreases, and the operating current correspondingly decreases. By repeatedly detecting the motor's operating current and comparing its magnitude before and after chopping, this load change pattern can be accurately captured, thus accurately determining whether the motor is operating normally. Different foods have significant differences in hardness and toughness, affecting the motor load differently. By comparing the magnitude of the motor's operating current, the chopping difficulty and progress of the food can be determined. For example, when chopping harder meat, if the operating current remains high without decreasing, it indicates that the meat may not be fully chopped, and the chopping time can be appropriately extended. Conversely, when chopping softer vegetables, if the operating current decreases rapidly, it indicates that the vegetables are mostly chopped, and the chopping process can be ended earlier. This method of adaptively adjusting the chopping time based on current changes improves the efficiency and quality of food processing. When the motor's operating current increases abnormally, the heat generated inside the motor will also increase accordingly. Prolonged overheating will accelerate the aging of the motor's insulation materials, reduce its lifespan, and may even lead to motor burnout and other safety accidents. By comparing the initial and subsequent operating current values, abnormal current increases can be detected promptly, and appropriate protective measures can be taken, such as stopping the motor or reducing its speed, effectively preventing overheating damage and ensuring operator safety.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Traditional meat choppers, with their continuous unidirectional cutting, produce overly fine minced meat, damaging its fiber structure and resulting in a loss of chewiness and elasticity. This meat chopper, however, utilizes a rotating blade assembly design. First, the blades rotate forward to chop the meat, then the motor reverses to allow the back of the blades to stir the food, simulating the effect of manual "beating and pounding." This preserves some of the meat's fibrous structure, increases its elasticity, and makes meatballs, meat pies, wonton fillings, and other dishes more chewy and elastic. The controller can determine the type of food based on the operating current and set the target chopping time. This method allows for precise operation based on the actual condition of the meat, avoiding over-chopping or under-chopping, ensuring the meat reaches the ideal chopping state, and further improving the final product's texture. 2. This chopper can automatically complete the entire process of "chopping first, then mixing and strengthening," without requiring manual switching of working modes or other intervention from the operator. Users simply need to place the meat into the mixing cup, start the machine, and wait for it to finish. This greatly simplifies the operation, saves time and effort, and is especially suitable for busy modern lifestyles. The current detection module can monitor the working current of the motor in the mixing blade assembly in real time, and the controller determines the type of food based on the current magnitude. This allows the machine to intelligently adapt to different types, quantities, and initial temperatures of meat, eliminating the need for users to manually set chopping time and mixing intensity based on experience, reducing operational difficulty, and improving ease of use and intelligence. 3. The special design of the mixing blade assembly, with one side featuring an opened blade and the other side featuring an unopened blade back, combined with its forward and reverse rotation, improves the tumbling path of food within the mixing cup. During chopping, the forward rotation of the blade and the reverse rotation of the blade back help to better disperse and tumble the ingredients, preventing over- or under-chopping in certain areas, thus improving the uniformity of chopping and ensuring that every part of the meat is processed evenly. 4. Because this shredder can precisely control the shredding and mixing processes, it avoids problems such as overheating and damage to the motor caused by prolonged excessive load operation. At the same time, the reasonable shredding and mixing methods also reduce wear on components such as the mixing blade assembly, extending the equipment's service life and lowering maintenance and replacement costs. The current detection module can monitor the motor's operating current in real time. By comparing the magnitudes of the initial and subsequent operating currents, the controller can promptly detect abnormal motor operation conditions, such as overload or short circuit. When an abnormal current is detected, the controller can immediately take corresponding protective measures, such as stopping the motor and issuing an alarm, to prevent damage to the motor due to abnormal operation and ensure the safe operation of the equipment. Through current detection and comparison, the controller can promptly detect mechanical faults and stop the equipment, preventing operators from continuing to operate the equipment unknowingly, thereby reducing the risk of mechanical injury. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Fig. 1 This is a schematic diagram of a partial explosion structure according to an embodiment of the present invention; Fig. 2 This is a schematic diagram of the internal structure of the stirring cup according to an embodiment of the present invention; Fig. 3 This is a schematic cross-sectional view of the stirring cup body according to an embodiment of the present invention; Fig. 4 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0028] Key reference numerals in the attached drawings: 1. Stirring cup body; 11. Opening; 12. Reflux section; 13. Rounded corner section; 14. Jacket; 141. Refrigerant medium; 15. Groove; 16. Protrusion; 17. Handle; 2. Main unit cover; 21. Snap-fit ​​edge; 22. Handle arc snap-fit ​​edge; 23. Annular seat; 3. Stirring blade assembly; 31. Blade; 32. Blade back; 33. Upper blade assembly; 34. Lower blade assembly; 341. Horizontal part; 342. Bending part; 4. Circuit board assembly; 41. Current detection module; 42. Controller; 5. Base; 51. Placement cavity; 511. Boss; 512. Slot; 52. Suction cup; 53. Support platform; 54. First snap-fit ​​assembly; 6. Main control base; 61. Connecting platform; 62. Second snap-fit ​​assembly; 63. Annular boss. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0034] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0035] Please refer to Embodiment 1 of the present invention. Figs. 1 to 4 As shown, a meat chopper that can toughen meat is provided, which mainly consists of a mixing cup 1, a main unit cover 2, a mixing blade assembly 3, a circuit board assembly 4, etc.

[0036] In this embodiment 1, the stirring cup 1 is preferably a reverse-sloping cup. The cup wall includes a reflux section 12 and a rounded corner section 13 in the vertical direction from top to bottom. The reflux section 12 is inclined from top to bottom away from the central axis of the cup, with an inclination angle of 3°, so that the angle between the reflux section 12 and the bottom surface is 87°. In other embodiments, the angle between the reflux section 12 and the central axis can also be selected in the range of 1° - 8°.

[0037] To enhance preservation, a jacket 14 can be provided inside the cup wall, filled with a refrigeration medium 141 for preservation. This effectively extends the freshness of meat, preserves nutrients, and integrates food storage and processing. In this embodiment 1, the refrigeration medium 141 is a brine solution with a concentration of 23%.

[0038] The mixing cup 1 has an opening 11 at its top, and the main unit cover 2 covers the opening 11 of the mixing cup 1. The mixing blade assembly 3 is disposed on the main unit cover 2 and extends into the mixing cup 1. Preferably, in this embodiment 1, the mixing blade assembly 3 is a suspended blade assembly, including a lower blade assembly 34 and an upper blade assembly 33. The blades of the lower blade assembly 34 are composed of a horizontal part 341 and a bent part 342. The angle between the bent part 342 and the horizontal part 341 is 23°. In other embodiments, it can also be selected in the range of 18° to 28°. The blade edge 31 is inclined upward and points to the connection between the reflux section 12 and the rounded corner section 13. This design allows the bent part 342 to apply additional pressure to the food like a lever when the blade is rotating and cutting the food, thereby improving the chopping efficiency. During the mixing and strengthening stage, it can better drive the food to roll, simulating the effect of manual pounding and strengthening.

[0039] The circuit board assembly 4 is set on the main unit cover 2 to control the forward or reverse rotation of the mixing blade assembly 3. The circuit board assembly 4 is equipped with a current detection module 41 and a controller 42. The controller 42 receives the working current of the motor in the mixing blade assembly 3 detected by the current detection module 41, and determines the type of food and the target working time for the blade 31 to chop based on the working current. After the target time, the controller controls the motor to reverse so that the back of the blade 32 can stir the food.

[0040] In this embodiment 1, a main control base 6 is also provided on the main unit cover 2. The main control base 6 presses against the main unit cover 2. The circuit board assembly 4 and the stirring blade assembly 3 are both disposed within the main control base 6. To ensure the stability of the stirring cup 1, a base 5 is also provided. The top of the base 5 has a placement cavity 51 for accommodating and fixing the stirring cup 1. A boss 511 is provided within the placement cavity 51, and a slot 512 is provided on the boss 511. The bottom of the cup has a groove 15 that matches the boss 511, and a protrusion 16 that matches the slot 512 is provided within the groove 15. Magnets attract each other on the slot 512 and the protrusion 16, facilitating precise positioning and quick installation of the stirring cup 1. A suction cup 52 is provided at the bottom of the base 5, filled with sound-insulating material to enhance the stability of the equipment during use and reduce noise. The stirring cup 1 is connected to the base 5 via a snap-fit ​​structure, or it can be snap-fitted to the main unit cover 2 for easy disassembly and cleaning.

[0041] In some embodiments, the base 5 is provided with at least two upwardly extending support platforms 53, which are evenly distributed on the base 5. The placement cavity 51 is located between at least two support platforms 53. The mixing cup 1 can also be provided with handles 17 extending to both sides at the opening 11, so that users can directly grasp the handles 17 to carry the mixing cup 1 containing ingredients when they need to move it. Furthermore, the edge of the main unit cover 2 is provided with a snap-fit ​​edge 21 that wraps around and abuts against the opening 11. The snap-fit ​​edge 21 fits tightly with the edge of the cup mouth, which can effectively prevent ingredients from splashing out during the chopping and mixing process and keep the kitchen environment clean. The main unit cover 2 is provided with a handle arc snap-fit ​​edge 22 corresponding to the handle 17. The main control base 6 is provided with at least two radially outwardly extending connecting platforms 61, each corresponding to a support platform 53. A first snap-fit ​​component 54 is provided on the support platform 53, and a second snap-fit ​​component 62 adapted to the first snap-fit ​​component 54 is provided on each connecting platform 61. The first snap-fit ​​component 54 and the second snap-fit ​​component 62 snap together to press the stirring cup 1 and the main unit cover 2 between the base 5 and the main control base 6. One of the first snap-fit ​​component 54 and the second snap-fit ​​component 62 is a snap-fit ​​groove, and the other is a snap-fit ​​component with a buckle. The buckle and the buckle groove are aligned and abut against each other, and the snap-fit ​​component engages to lock the buckle and the buckle groove. In this embodiment 1, two connecting platforms 61 and two support platforms 53 are provided, symmetrically arranged on both sides of the main control base 6 and the base 5.

[0042] Preferably, the main body cover 2 has an annular seat 23 on the side facing the main control base 6, and the main control base 6 has a matching annular boss 63 corresponding to the annular seat 23 on the main body cover 2. The annular boss 63 is inserted into the annular seat 23. In the horizontal direction, the insertion structure of the annular boss 63 and the annular seat 23 provides good limiting for the main body cover 2 and the main control base 6; in the vertical direction, after the annular boss 63 is inserted into the annular seat 23, a certain friction and mechanical interlocking force are formed between the two, which enhances the connection between the main body cover 2 and the main control base 6. At the same time, this insertion design reduces collisions and friction caused by loose parts, thereby reducing the noise generated during the operation of the shredder.

[0043] This invention also relates to a control method for a meat chopper, employing a meat chopper capable of firming meat, comprising the following steps: S1: The operator sets the chopping mode, which corresponds to the type of food and the final chopping form: start the motor and control the blade assembly to rotate in the first direction for a first predetermined time, wherein the blade 31 of the stirring blade assembly 3 acts on the food to chop it. S2: Detect the operating current of the motor within the first predetermined time period; S3: Based on the working current, determine the type of food and the target working time for the blade assembly to rotate in the first direction; S31: Repeatedly detect the magnitude of the motor's operating current; compare the magnitudes of the prior operating current and the subsequent operating current; if the prior operating current is greater than the subsequent operating current, determine that the shredder is working normally; if the prior operating current is less than or equal to the subsequent operating current, determine that the shredder is working abnormally. S4: When the target working time is reached, control the motor to reverse and drive the stirring blade assembly 3 to rotate in a second direction opposite to the first direction for a second predetermined time, wherein the back of the blade 32 of the stirring blade assembly 3 acts on the food to stir and strengthen it.

[0044] In some embodiments, optionally, in step S2, detecting the operating current of the motor specifically involves: the detection of the operating current of the motor and the determination of the operating time of the motor being controlled by a microcontroller; the output port of the microcontroller is connected to a transistor, and the conduction and cutoff of the transistor drive a thyristor; the thyristor is connected to the motor; the voltage detection port of the microcontroller is connected to the circuit connected to the motor, and the operating current of the motor is detected by acquiring the reading of the voltage detection port and calculating the magnitude of the current flowing through the motor.

[0045] In some embodiments, optionally, in step S2, detecting the operating current of the motor specifically involves: detecting the voltage across a sampling resistor connected in series with the motor, and calculating the operating current based on the voltage and the resistance value of the sampling resistor; detecting and calculating the average value of the operating current multiple times within the first predetermined time period, and using the average value as the basis for judgment.

[0046] The following description is divided into three specific scenarios: Scenario 1: Suitable for processing meats with coarse fibers and tough texture, such as beef and brisket, and for making products that require a strong chewiness and elasticity, such as Chaoshan beef balls and hamburger patties.

[0047] Operating steps: Operators can set the high-elasticity meat chopping and firming mode through the control panel on the chopper or a mobile APP. This mode corresponds to the type of high-elasticity meat and the final chopping form of the minced meat.

[0048] S1, Start-up and Initial Chopping: After the user selects a mode such as "Beef" or "Lamb" to start the equipment, the controller 42 first drives the motor to rotate forward at high power (first direction), driving the blade assembly 31 to perform powerful chopping. The first predetermined time for this mode, the initial chopping time, is set to be relatively long, for example, 10-15 seconds, to ensure that the tough meat fibers can be initially broken through. During the forward rotation, the blade assembly 31 acts on the food to chop it.

[0049] S2-S3, Current Detection and Judgment: During the initial chopping stage and subsequent processes, the controller 42 continuously samples the motor's operating current through the current detection module 41. Due to the high hardness and coarse fibers of beef, its average operating current is significantly higher than that of other meats, and the inflection point of current decrease occurs later. The inflection point means that large pieces of meat have been basically chopped. The controller 42 recognizes this high current characteristic and determines a relatively long total target chopping time accordingly, for example, the total time may reach 60-90 seconds, to ensure that the meat is fully chopped into granules, rather than minced meat.

[0050] S4, after the target chopping time is reached and the mixture is thoroughly stirred, the controller 42 immediately reverses the motor for a longer period, i.e., the second predetermined time, for example, 40-60 seconds. During this time, the back of the blade 32 stirs the minced meat at a relatively low speed. The design of the reverse-sloping cup wall and the bent blade works together to repeatedly push the minced meat upwards and then downwards, simulating the effect of repeated pounding by hand, causing the coarse beef fibers to intertwine and become fully pliable. Throughout the process, the motor power is maintained at a high level to overcome the enormous resistance of the minced meat.

[0051] This mode is characterized by high chopping power, long total chopping time, and long mixing and gluten development time, aiming to process the toughest meats with the greatest force and the longest time to achieve the best chewy texture.

[0052] Scenario 2: Suitable for processing meats with fine fibers and medium firmness, such as pork and chicken, and for making fillings that require a delicate texture while maintaining elasticity, such as dumpling fillings, wonton fillings, and meatballs.

[0053] Operating steps: Operators can set the general meat chopping and firming mode through the control panel on the chopper or a mobile APP. This mode corresponds to the type of general meat and the final chopped form of the minced meat.

[0054] S1, Start-up and Initial Chopping: After the user selects a mode such as "Pork" or "Chicken," the device is started. The controller 42 first drives the motor to rotate forward at a medium-low power (first direction), driving the blade assembly 31 to perform regular chopping. The initial chopping time for this mode is set shorter than that for beef, for example, 8-10 seconds, to avoid over-chopping the softer pork at the beginning. During the forward rotation, the blade assembly 31 acts on the food to chop it.

[0055] S2-S3, Current Detection and Judgment: When processing pork, the average operating current of the motor is lower than that of beef. The controller 42 identifies this moderate current level and monitors the rate of current decrease. Once the current stabilizes and begins to decrease within a short time, it is determined that the meat is basically chopped, and a moderate total target chopping time is determined, such as 30-50 seconds. The aim is to cut the meat into uniform particles while retaining some fibrous texture. Different types of common meats, such as pork and chicken, have slightly different fiber structures and hardness, resulting in different motor operating currents. The controller 42 makes precise judgments and sets the time based on these subtle differences. The controller 42 identifies this high current characteristic and determines a reasonable total target chopping time accordingly.

[0056] S4, Stirring until firm: After chopping, the motor reverses to stir and firm the meat. The second preset time for this mode is set to a medium duration, such as 20-40 seconds. The back of the blade 32 stirs at medium speed to evenly mix the lean and fatty parts of the minced meat and distribute the added seasonings and other ingredients evenly. The protein molecules are moderately cross-linked to form an elastic gel-like structure, resulting in a smooth and bouncy texture.

[0057] This mode is characterized by its moderate power and time. The chopping force and time are sufficient to ensure uniform particle size without over-chopping; the mixing time is sufficient to create elasticity without making the meat tough. It achieves a balance between fineness and chewiness.

[0058] Scenario 3: This mode is suitable for situations requiring quick processing of meat ingredients, such as preparing simple minced meat for stir-fries when time is limited. This mode aims to minimize processing time while ensuring adequate chopping and mixing.

[0059] Operating steps: Operators can set a fast meat chopping and firming mode via the control panel on the chopper or a mobile app. This mode is suitable for simple meat types and the final shredded form of minced meat.

[0060] S1, Start-up and Initial Chopping: After the user selects a mode such as "Quick Meat Processing," the equipment is started. Requirements for the chopped shape and firmness are relatively low. The motor is started, and the blade assembly rotates in a forward direction at low power for a first predetermined time, such as 5-15 seconds.

[0061] S2-S3, Current Detection and Judgment: When processing meat quickly, the average operating current of the motor will be lower. The controller 42 recognizes this moderate current level and monitors the rate of current decrease. Once the current stabilizes and begins to decrease within a short period, it is determined that the meat has been basically chopped. An appropriate total target chopping time is then determined, for example, 20-60 seconds. The goal is to chop the meat while retaining some of its fibrous texture. In fast mode, the chopping time is relatively short to improve overall processing efficiency.

[0062] S4, after the target working time is reached, the motor reverses and the blade assembly rotates in the opposite direction for a second predetermined time, such as 30-60 seconds. This quick mixing and firming process gives the meat a certain elasticity and resilience, meeting the needs of rapid cooking.

[0063] In the above scenarios, it can also be used in conjunction with the low temperature / preservation mode, which is suitable for use in seasons with higher ambient temperatures, or for processing premium minced meat (such as Japanese fried meat patties) that need to be kept at low temperatures to improve taste and freshness, as well as for processing low-temperature meat taken from the refrigerator.

[0064] Operating steps: The user selects the "low temperature" mode to start the machine. The controller 42 first activates the semiconductor cooling element in the jacket 14 of the mixing cup 1 (or activates the pre-filled cooling medium 141, such as the pre-freezing chamber cooling medium 141 continuously supplying cooling) to pre-cool or continuously cool the cup. The motor rotates forward to chop, but its operating strategy is different. In this mode, the controller 42 focuses not only on the type of food but also on whether the motor's operating current is abnormally high. Because low temperatures increase the hardness of meat and solidify fats, the initial operating current may be slightly higher than that of similar meat at room temperature. The controller 42 can identify this "low temperature, high current" characteristic and distinguish it from abnormal blockages caused by foreign objects (by comparing the initial and subsequent current values; if the current continues to rise abnormally, it is considered a fault). It determines a chopping cycle but uses a "short, multiple" chopping strategy (e.g., 5 seconds forward, 2 seconds pause, then 5 seconds forward) to avoid the motor overheating from continuously overcoming hard meat, and also to allow the cooling system time to dissipate the heat generated by the friction of the blades, maintaining a low temperature environment inside the cup.

[0065] At low temperatures, the denaturation and cross-linking of proteins slow down. Therefore, after chopping, the controller 42 continues to perform low-speed, long-duration reverse mixing (second predetermined time) at a low temperature. Low-temperature mixing can maximally inhibit bacterial growth, maintain the tenderness of the meat, and allow the gluten development process to proceed slowly and thoroughly, resulting in a unique, firm, and juicy texture.

[0066] This mode activates the cooling function of the cup and employs a control strategy of intermittent chopping and low-speed, long-term tackling. All operations prioritize maintaining a low temperature to prevent the ingredients from heating up during processing, thereby ensuring the freshness and unique taste of the final product.

[0067] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A meat chopper capable of firming meat, characterized in that, include: A stirring cup (1) having an opening (11); Main unit cover (2), the main unit cover (2) is provided at the opening (11); The stirring blade assembly (3) is located on the main unit cover (2) and extends into the stirring cup (1). One side of the stirring blade assembly (3) is an opened blade (31) for chopping, and the other side is an unopened blade back (32). Circuit board assembly (4), the circuit board assembly (4) is disposed on the main body cover (2) and controls the stirring blade group (3) to rotate forward or reverse. The circuit board assembly (4) is provided with a current detection module (41) and a controller (42). The controller (42) receives the working current of the motor in the stirring blade group (3) detected by the current detection module (41). The controller (42) is configured to: determine the type of food according to the working current and determine the target working time for the blade (31) to chop, and control the motor to reverse after the target time so that the back of the blade (32) can stir the food.

2. The meat chopper according to claim 1, characterized in that, The stirring cup (1) is a reverse-sloping cup. The cup wall of the stirring cup (1) includes a reflux section (12) and a rounded corner section (13) in the vertical direction from top to bottom. The reflux section (12) is inclined from top to bottom away from the central axis of the cup, with an inclination angle of 1°-8°. The stirring blade assembly (3) is a suspended blade assembly, including a lower blade assembly (34) and an upper blade assembly (33). The blade (31) of the lower blade assembly (34) is inclined upward and points to the connection between the reflux section (12) and the rounded corner section (13).

3. A meat chopper capable of firming meat according to claim 2, characterized in that, The blade of the lower blade assembly (34) is composed of a horizontal part (341) and a bent part (342), and the included angle between the bent part (342) and the horizontal part (341) is in the range of 18°-28°.

4. A meat chopper capable of firming meat according to claim 1, characterized in that, The mixing cup (1) has an inner layer (14) inside the cup wall, and the inner layer (14) is filled with a refrigeration medium (141) for preservation.

5. A meat chopper capable of firming meat according to claim 1, characterized in that, It also includes a base (5), the top of which is provided with a placement cavity (51) for accommodating and fixing the stirring cup (1), and the bottom of which is provided with a suction cup (52) filled with sound insulation material; The stirring cup (1) is connected to the base (5) by a snap-fit ​​structure, or the stirring cup (1) is connected to the main unit cover (2) by a snap-fit ​​structure.

6. A meat chopper capable of firming meat according to claim 5, characterized in that, The placement cavity (51) is provided with a boss (511), and the boss (511) is provided with a slot (512); the bottom of the stirring cup (1) is provided with a groove (15) that matches the boss (511), and the groove (15) is provided with a protrusion (16) that matches the slot (512); the slot (512) and / or the protrusion (16) are provided with magnets that attract each other.

7. A control method for a shredder, characterized in that, The method of using a meat chopper as described in any one of claims 1-6 includes the following steps: S1: The operator sets the chopping mode, which corresponds to the type of food and the final chopping form: start the motor and control the blade assembly to rotate in the first direction for a first predetermined time, wherein the blade (31) of the stirring blade assembly (3) acts on the food to chop it; S2: Detect the operating current of the motor within the first predetermined time period; S3: Based on the working current, determine the type of food and the target working time for the blade assembly to rotate in the first direction; S4: When the target working time is reached, control the motor to reverse and drive the stirring blade assembly (3) to rotate in a second direction opposite to the first direction for a second predetermined time, wherein the back of the blade (32) of the stirring blade assembly (3) acts on the food to stir and strengthen it.

8. The control method for a shredder according to claim 7, characterized in that, In step S2, detecting the operating current of the motor specifically involves: The detection of the motor's operating current and the determination of the motor's operating time are accomplished by a microcontroller. The output port of the microcontroller is connected to a transistor, and the thyristor is driven by the conduction and cutoff of the transistor. The thyristor is connected to the motor; The voltage detection port of the microcontroller is connected to the circuit of the motor. The operating current of the motor is detected by acquiring the reading of the voltage detection port and calculating the current flowing through the motor.

9. The control method for a shredder according to claim 7, characterized in that, In step S2, detecting the operating current of the motor specifically involves: The voltage across a sampling resistor connected in series with the motor is detected, and the operating current is calculated based on the voltage and the resistance value of the sampling resistor. The average value of the operating current is detected and calculated multiple times within the first predetermined time period, and the average value is used as the basis for judgment.

10. A control method for a shredder according to claim 7, characterized in that, Before the end of the motor's operating time, step S31 is also included: Repeatedly detect the magnitude of the motor's operating current; compare the magnitudes of the earlier and later operating currents; If the prior operating current is greater than the subsequent operating current, the shredder is considered to be operating normally. If the prior operating current is less than or equal to the subsequent operating current, the shredder is deemed to be malfunctioning.

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