Automatic metering and self-cleaning discharging device and control method for catering intelligent preparation

Abstract

The application discloses an automatic metering and self-cleaning discharging device for catering intelligent preparation and a control method, relates to the technical field of catering intelligent preparation equipment, and aims to solve the problems of low integration, easy vibration interference in metering and frequent manual disassembly and washing of semi-solid small material discharging equipment. The device comprises a body mechanism, a discharging mechanism, a cleaning mechanism and a controller. The discharging mechanism is provided with a plurality of long and short auger discharging assemblies arranged alternately, and a weighing sensor is used to detect the residual material amount of the hopper and the discharging weight in the receiving container. The cleaning mechanism selectively supplies liquid through a liquid supply switching assembly and a shunt control assembly, uses a water blocking assembly to block the discharging port of the auger pipe to form a water storage cleaning space, and drives the rotation of the auger to disturb the cleaning liquid. The cleaning wastewater is filtered by a water collecting assembly and discharged through a drainage pipeline. The application can be used for the automatic storage, quantitative discharging and self-cleaning of semi-solid small materials such as double-skinned milk and tea jelly.

Description

Technical Field

[0001] This invention relates to the field of intelligent food preparation equipment technology, and in particular to an automatic metering and self-cleaning discharging device and control method for intelligent food preparation. Background Technology

[0002] With the rapid development of the catering industry towards automation and intelligence, intelligent preparation equipment such as milk tea robots and automated beverage workstations have been gradually applied to the automated storage, metering, and dispensing of materials. For low-viscosity fluids such as syrups and jams, existing technologies typically use liquid pumps for transportation, which is a relatively mature technology. However, for semi-solid ingredients with a certain viscosity, containing solid particles or in a gel state, such as double-skin milk, tea jelly, peach velvet, and various crystal balls, conventional liquid pumps are prone to clogging or failing to achieve stable delivery due to their special characteristics in terms of flowability and morphological stability. Therefore, existing equipment generally uses auger (spiral) conveying mechanisms as the main dispensing element for these semi-solid ingredients.

[0003] Existing auger-type material discharge devices still have many shortcomings in practical applications. First, these devices are mostly single-function, with multiple hoppers, auger pipes, and corresponding drive motors typically arranged side-by-side in a single direction. This loose structural layout results in a large overall footprint, making it difficult to adapt to the integrated design requirements of intelligent catering preparation equipment with limited internal space and the need to simultaneously arrange multiple discharge channels. Second, the mechanical vibration generated during the auger's rotation and conveying process, as well as the fixed connection between the hoppers, weighing structure, and other rigid connecting parts, directly transmits external vibrations and additional stresses to the weighing sensors. This interferes with the static detection of the weight of the remaining material in the hopper and the dynamic detection of the material weight during the discharge process.

[0004] Furthermore, semi-solid materials have high adhesiveness, easily leaving residues and caking on the inner walls of the hopper, the surface of the auger blades, the inner walls of the auger pipe, and the edges of the discharge port. To address this issue, most existing equipment relies on manual, periodic disassembly and cleaning of various components, resulting in significant maintenance workload and prolonged equipment downtime. Some equipment attempts to flush by directly injecting cleaning water into the hopper; however, since the discharge port is usually open, the cleaning water quickly flows out after injection, failing to create effective soaking and turbulent scouring within the auger and auger pipe cavity, resulting in very limited cleaning effect on the adhered materials. Simultaneously, when the upper casing of the agitator mechanism above the hopper is opened for replenishment or maintenance, the agitator rod extending into the hopper is prone to positional interference with the hopper edge, hindering daily maintenance and internal cleaning operations.

[0005] Therefore, how to provide a compact and highly integrated automatic metering and self-cleaning discharge device to achieve independent conveying and automatic metering of various semi-solid small materials, reduce weighing interference, and improve automatic cleaning capability and equipment operation reliability is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides an automatic metering and self-cleaning discharging device and its control method for intelligent food preparation, which at least solves the problems of low integration, insufficient metering accuracy, easy interference of mechanical vibration and rigid connection with weighing detection, easy adhesion of material residue, high frequency of manual disassembly and washing, and insufficient safety of discharging and washing in existing semi-solid small material discharging equipment.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an automatic metering and self-cleaning discharging device for intelligent food preparation, which includes a body mechanism, a discharging mechanism, a cleaning mechanism and a controller;

[0008] The fuselage mechanism includes a frame and a housing assembly fixedly connected to the frame; The material feeding mechanism includes multiple material feeding and conveying assemblies mounted on the frame. Each material feeding and conveying assembly includes a hopper, a first weighing sensor, a conveying pipe, a conveying component, and a drive motor. The hopper is supported on the first weighing sensor by a weighing support structure, and the outlet of the hopper is connected to the inlet of the conveying pipe. The conveying component is rotatably mounted inside the conveying pipe and is driven by the output shaft of the drive motor. The rotation of the conveying component can introduce the material in the hopper into the conveying pipe through the inlet and discharge it from the outlet of the conveying pipe. The hopper is provided with a liquid inlet communicating with its interior. The material feeding mechanism also includes a weighing component, which includes a receiving plate and a second weighing sensor. The receiving plate is located below the discharge port of the conveying pipe and is supported on the frame by the second weighing sensor. It is used to weigh the container that receives the material discharged from the conveying pipe. The cleaning mechanism includes a liquid supply component, a diversion component, a water blocking component, and a drain channel. The liquid supply component's outlet end is connected to the diversion component's inlet end. The diversion component includes multiple liquid supply branches that are connected to each of the inlets, for selectively supplying cleaning liquid into each of the hoppers. The water blocking component is movably located at the outlet of the conveying pipe and can switch between a closed state and an open state. The receiving plate has an inlet hole and a drain hole. The inlet hole is connected to the diversion component, and the drain hole is connected to the drain channel. The controller is electrically connected to the first weighing sensor, the second weighing sensor, the drive motor, the liquid supply component, the diversion component, and the water blocking component, respectively. The controller is used to determine the amount of residual material in the corresponding hopper based on the weight information detected by the first weighing sensor, control the start and stop of the drive motor of the target material conveying component based on the weight change of the container and the material inside it detected by the second weighing sensor, and control the cleaning mechanism and the drive motor to perform cleaning and liquid drainage actions.

[0009] The technical effects of this invention are as follows: By compactly arranging multiple material conveying components and using flexible connecting pipes to isolate vibration transmission and rigid constraints between the weighing sensors and the conveying components, the structural integration and the accuracy of residual material weighing are significantly improved. Simultaneously, a water-blocking component that can switch between closed and open states closes the discharge port during cleaning, creating a water storage space within the hopper and conveying pipe. The drive motor then rotates the conveying components to agitate the cleaning fluid for dynamic flushing, achieving efficient self-cleaning of adhering semi-solid small materials. Combined with the multi-channel selective liquid supply component and the self-rinsing function of the receiving plate, the frequency of manual disassembly and cleaning is greatly reduced. Furthermore, the controller monitors residual material in real time based on the first weighing sensor and uses a closed-loop control system based on the second weighing sensor to start and stop the drive motor, achieving multi-channel independent quantitative discharge and fully automated process control. This systematically solves the problems of low space utilization, susceptibility to weighing interference, poor cleaning effect, and insufficient intelligence in existing equipment.

[0010] Preferably, the plurality of the material feeding and conveying components include a short auger feeding component and a long auger feeding component; The conveying pipe and conveying component of the short auger unloading assembly are a short auger pipe and a short auger, respectively; the conveying pipe and conveying component of the long auger unloading assembly are a long auger pipe and a long auger, respectively; the length of the short auger pipe is less than the length of the long auger pipe, and the length of the short auger is less than the length of the long auger. The axes of the short auger pipe and the long auger pipe are parallel to each other and located in the same horizontal plane. The discharge ports of each of the conveying pipes are flush with each other, and the end faces of each discharge port are located in the same plane. The material feeding mechanism further includes a first fixing plate, a second fixing plate, two first fixing blocks and two second fixing blocks. The first fixing plate and the second fixing plate are both rectangular plate structures and are spaced apart along the axial direction of the conveying pipe. The first fixing plate and the second fixing plate are respectively provided with a plurality of circular mounting holes that correspond one-to-one. Each of the short auger tubes and each of the long auger tubes pass through the corresponding circular mounting holes on the first fixing plate and the second fixing plate in sequence, and are radially supported and radially limited by the first fixing plate and the second fixing plate. The two ends of the first fixing plate are respectively fixed to the frame by two first fixing blocks, and the two ends of the second fixing plate are respectively fixed to the frame by two second fixing blocks; Each of the material feeding and conveying components further includes a clamp, a flexible connecting pipe, an end cap, and a universal coupling; the two ends of the flexible connecting pipe are respectively sleeved on the discharge port of the hopper and the inlet of the corresponding conveying pipe, and are respectively fixed by the clamp; the end cap is fixedly connected to the end of the corresponding conveying pipe near its inlet; the end cap has a bearing hole in its center and is rotatably connected to the conveying component through the bearing, and the conveying component is driven by the output shaft of the drive motor through the universal coupling.

[0011] The resulting technical effects are as follows: By simultaneously setting short and long auger tubes of different lengths in the material feeding and conveying assembly and arranging them alternately, with all discharge port ends remaining flush, a compact structure of multi-channel independent conveying and axially staggered motor arrangement is achieved within a limited space; at the same time, relying on the first and second fixed plates spaced apart along the axial direction of the conveying pipe to form dual-point radial support and limit for each auger tube, the stability and reliability of auger operation are significantly improved; in addition, the flexible connection between the hopper and the conveying pipe is achieved through a flexible connecting pipe, which can effectively isolate the transmission of vibrations generated by the drive motor and auger operation to the hopper and the first weighing sensor, and reduce the additional constraints brought by rigid connection. Combined with the rotational support of the conveying components by the end cover bearing and the compensation of the axial deviation between the motor output shaft and the auger by the universal coupling, the weighing accuracy, power transmission smoothness and overall operational reliability are further improved.

[0012] Preferably, the housing assembly includes a top plate, a front plate, two side plates a, a limit switch fixing plate, a bottom mounting plate, a side plate b, a rear plate, a side plate c, and a narrow plate; The top plate, the front plate, the two side plates a, and the rear plate are respectively fixedly connected to the top, front, left and right sides, and rear side of the frame. The limit switch fixing plate is located below the front plate. The bottom mounting plate is installed inside the frame. The side plates b and c are respectively installed below the two side plates a. The narrow plate is installed on the lower front side of the frame.

[0013] The resulting technical effect is that by fixing the top plate, front plate, side plate, rear plate, and limit switch fixing plate to the corresponding positions of the frame, a complete shielding and protection is formed for the unloading mechanism, cleaning mechanism, and controller. At the same time, the bottom mounting plate and limit switch fixing plate provide installation support for internal components and detection elements, effectively improving the integration, safety, and maintenance convenience of the equipment.

[0014] Preferably, the controller includes a control box, a power module, a motor drive board, a relay module, a weighing module, hinge b, a box door, a main control board, and a switch; The control box is fixedly installed on the frame, and the power module, the motor drive board, the relay module, the weighing module and the main control board are all installed inside the control box; The power supply module is connected to the power supply ports of the motor drive board, the relay module, the weighing module, and the main control board, respectively; the main control board is electrically connected to the motor drive board, the relay module, and the weighing module, respectively. The weighing module is electrically connected to each of the first weighing sensor and the second weighing sensor, the motor drive board is electrically connected to each of the drive motors, and the relay module is electrically connected to the electronic control actuators of the liquid supply assembly and the diversion assembly. The main control board is electrically connected to multiple limit switches a, and each of the multiple limit switches a is respectively set to correspond one-to-one with the discharge port of the multiple conveying pipes, for detecting whether the container is placed at the receiving position of the corresponding conveying pipe. When the limit switch a detects that the corresponding container has been placed in place, the main control board allows the drive motor corresponding to the container to start, and when the limit switch a does not detect that the corresponding container has been placed in place, it prohibits the corresponding drive motor from starting. The door is hinged to the opening of the control box via hinge b. The display and operation interface of the main control board is installed at the opening of the door and exposed on the outer surface of the door. The switch is installed on the side wall of the control box.

[0015] The resulting technical advantages are as follows: The power module, motor drive board, relay module, weighing module, and main control board are centrally installed within the control box, achieving modular integration of the control system and significantly improving the compactness of the electrical layout and ease of maintenance. Furthermore, by installing limit switches (a) at the corresponding positions of the discharge ports of each conveying pipe, the main control board only allows the corresponding drive motor to start when it detects that the receiving container is in place; otherwise, it prohibits it, effectively preventing material spillage due to missing or misaligned containers and improving the safety and accuracy of the discharge operation. The door is hinged to the control box opening via hinge (b), the main control board display and operation interface are exposed on the outer surface of the door, and the switches are located on the side wall of the control box, facilitating real-time monitoring of the equipment's operating status, convenient input of control commands, and power on / off switching, thus improving the convenience of human-machine interaction and the overall operability of the equipment.

[0016] Preferably, the machine body mechanism further includes a stirring mechanism disposed above the material feeding mechanism; The stirring mechanism includes an upper shell, a cover plate, multiple support seats, and multiple stirring components. The upper shell has a box structure with an open top. The multiple stirring components are arranged inside the upper shell and correspond one-to-one with each of the hoppers. Multiple support seats are fixedly installed inside the upper housing, and the cover plate is located at the upper opening of the upper housing and is fixedly connected to the upper housing through the multiple support seats.

[0017] The resulting technical effect is that multiple mixing components and multiple hoppers are arranged one-to-one in the upper shell, and the cover plate is fixed to the upper opening of the upper shell using the support base. An independent modular mixing unit is formed above the material discharge mechanism. This not only realizes the independent mixing and disturbance of the materials in each hopper, effectively reducing material agglomeration, stratification and bridging, and improving the uniformity and continuity of material entering the conveying pipe, but also provides overall protection and shielding for the mixing components through the upper shell and the cover plate, which facilitates the overall disassembly, maintenance and cleaning of the mixing module. At the same time, it forms a compact spatial layout in the vertical direction with the material discharge mechanism below, which improves the integration and maintainability of the whole machine.

[0018] Preferably, each of the stirring components includes a stirring motor, a coupling, a magnet, and a stirring rod; The stirring motor is fixedly installed inside the upper housing. One end of the coupling is fixedly connected to the output shaft of the stirring motor, and the other end is provided with a mounting cavity. The magnet is fixedly installed inside the mounting cavity. One end of the stirring rod is detachably attracted to the mounting cavity by the magnet, and the other end can extend downward into the corresponding hopper. The side wall of the mounting cavity is provided with a transmission groove for transmission connection of the stirring rod.

[0019] The resulting technical effects are as follows: the stirring motor drives the stirring rod to rotate via the coupling, realizing active stirring and agitation of the semi-solid small materials in the hopper, effectively preventing material agglomeration, stratification, and bridging, and ensuring the uniformity and continuity of material entering the conveying pipe; at the same time, the magnet fixed in the installation cavity of the coupling allows one end of the stirring rod to be detachably attracted to the installation cavity, enabling the stirring rod to be quickly disassembled and assembled without tools, greatly reducing the difficulty of cleaning, disinfecting, and replacing the stirring rod; in addition, the transmission groove set in the side wall of the installation cavity can form a reliable circumferential transmission fit with the stirring rod, combining the convenience of quick assembly and disassembly with the reliability of power transmission.

[0020] Preferably, the fuselage mechanism further includes at least two sets of flipping components, each set of flipping components being located on the same side of the upper housing; Each set of the flipping components includes a hinge a, a slider connecting block, a slider, and a guide rail. The guide rail is fixedly installed on the frame in the vertical direction. The slider is slidably installed in the guide rail and can move up and down along the guide rail. The slider connecting block is fixedly connected to the upper end of the slider. One end of the hinge a is fixedly connected to the side of the upper housing, and the other end is fixedly connected to the slider connecting block. The upper housing can move up and down along the guide rail with the sliding block and the sliding bar, and can be flipped relative to the sliding block via the hinge a, so that the stirring rod extends into the corresponding hopper in the working state and exits the corresponding hopper in the non-working state and flips to the avoidance position with the upper housing.

[0021] The resulting technical benefits are as follows: At least two sets of tilting components are installed on the same side of the upper casing. Each tilting component uses a combination of guide rails and slide bars to achieve vertical lifting and tilting, supplemented by hinge a to achieve tilting. This allows the upper casing to first rise vertically along the guide rails during manual cleaning, completely retracting the stirring rod from the hopper and creating clearance space, before tilting open via hinge a. This effectively avoids interference and collision between the stirring rod and the edge of the hopper, protecting both the stirring rod and the hopper from damage. Simultaneously, when closing, the casing tilts first and then descends vertically, ensuring the stirring rod accurately extends into the hopper, guaranteeing the normal operation of the stirring function. This structure not only facilitates safe and smooth opening of the upper casing for replenishment and maintenance by operators but also significantly improves the convenience of daily cleaning and internal component maintenance, reducing the risk of equipment malfunction due to interference during opening.

[0022] Preferably, the housing assembly includes a top plate fixedly installed on the top of the frame, and the controller includes a main control board and a relay module, wherein the main control board is electrically connected to a limit switch b; The limit switch b is fixedly installed in the opening of the top plate and corresponds to the position of the upper shell, and is used to detect whether the upper shell is closed in place; the main control board is electrically connected to the relay module, and the relay module is electrically connected to each of the stirring motors; when the limit switch b detects that the upper shell has left the closed position, the main control board controls each of the stirring motors to stop rotating or prohibits each of the stirring motors from starting through the relay module, and when the limit switch b detects that the upper shell is closed in place, it allows the relay module to connect the power supply circuit of each of the stirring motors.

[0023] The resulting technical benefits are as follows: A limit switch b is fixedly installed in the top plate opening corresponding to the upper housing position, enabling the main control board to detect in real time whether the upper housing is properly closed. Based on this, the main control board controls the power supply circuit of the mixing motor via a relay module. When the upper housing leaves the closed position, the main control board automatically controls the mixing motor to stop rotating or prevents it from starting, effectively avoiding the risk of personal injury or equipment damage caused by accidental rotation of the mixing rod during material replenishment or maintenance. The mixing motor is only allowed to operate when the upper housing is properly closed, ensuring that the mixing function is only activated under safe conditions. This reduces equipment failure rate and extends component lifespan.

[0024] Preferably, the weighing assembly further includes a perforated plate, a pad, a weighing fixing block, a wastewater transfer block, a wastewater connector a, a flexible connecting pipe b, and a fixing ring; The weighing fixing block is fixedly installed on the frame. One end of the second weighing sensor is connected to the weighing fixing block through a pad, and the other end is connected to the receiving plate through another pad. The receiving plate has a box-shaped structure with an open top, and the perforated plate is detachably connected to the open top of the receiving plate; the liquid inlet and the liquid outlet are respectively located at both ends of the receiving plate, and the inner bottom surface of the receiving plate is inclined towards the side of the liquid outlet. The fixing ring is installed at the drain hole, the wastewater adapter block is installed on the frame, the two ends of the flexible connecting pipe b are respectively connected to the inlet of the fixing ring and the inlet of the wastewater adapter block, the wastewater connector a is connected to the outlet of the wastewater adapter block, and the wastewater connector a is connected to the drain channel.

[0025] The resulting technical effects are as follows: The second weighing sensor is connected at both ends to the weighing fixing block and the receiving plate via pads, ensuring that the load of the receiving plate, its container, and the material on it is stably transferred to the sensor, guaranteeing the accuracy of the weighing detection. The receiving plate adopts a box-shaped structure with an open top and is equipped with a detachable perforated plate, facilitating the placement of the receiving container and the receiving of dropped materials, while also allowing for easy removal of the perforated plate for cleaning and maintenance. Simultaneously, the inlet and outlet holes are located at both ends of the receiving plate, with the inner bottom surface inclined towards the outlet hole, allowing the cleaning fluid to flow naturally to the outlet hole, improving drainage smoothness and self-cleaning effect. The outlet hole is connected to the wastewater transfer block fixed on the frame via a fixed ring and a flexible connecting pipe b. The deformation capability of the flexible connecting pipe effectively isolates the additional stress and tension generated by the drainage pipeline on the receiving plate, reducing interference from external pipelines on the weighing results, further improving the stability and accuracy of the dropped material weighing. Thus, while ensuring reliable weighing function, it also takes into account the comprehensive performance of cleaning drainage and weighing anti-interference.

[0026] Preferably, the cleaning mechanism further includes a water collection assembly detachably disposed on the perforated plate; The water collection assembly includes a wastewater tank, a filter screen tube fixing seat, and a filter screen tube. The wastewater tank is located below the discharge ports of the multiple conveying pipes and is used to receive the cleaning wastewater discharged from the discharge ports of the multiple conveying pipes. The wastewater tank is provided with a drain hole, and the filter screen tube is installed at the drain hole of the wastewater tank. The filter screen tube has multiple filter holes on its tube wall. The filter screen tube fixing seat is connected to the drain hole of the wastewater tank and is detachably inserted into the fixing ring, so that the cleaning wastewater in the wastewater tank enters the drainage channel in sequence through the filter screen tube, the filter screen tube fixing seat, the fixing ring, the flexible connecting pipe b, the wastewater transfer block and the wastewater connector a.

[0027] The resulting technical advantages are as follows: A detachable water collection assembly on the perforated plate allows the wastewater tank to centrally collect cleaning wastewater discharged from multiple conveying pipe outlets, preventing wastewater from splashing and polluting the internal environment of the equipment. Simultaneously, multiple filter holes on the filter screen tube wall intercept and filter solid material residues in the cleaning wastewater, effectively reducing the risk of residues entering subsequent drainage channels and causing blockages. The filter screen tube fixing seat is detachably inserted into the fixing ring, achieving quick connection between the wastewater tank and the drainage pipeline. It also allows operators to easily remove the entire water collection assembly after cleaning to clean residues inside the wastewater tank and deposits on the filter screen tube surface. Disassembly and cleaning can be completed without tools, significantly improving the convenience and efficiency of equipment maintenance and ensuring smooth discharge of cleaning wastewater.

[0028] Preferably, the controller includes a main control board and a limit switch c electrically connected to the main control board; The limit switch c is fixedly installed on the frame and corresponds to the wastewater tank, and is used to detect whether the wastewater tank is placed in place. The main control board prohibits the cleaning mechanism from starting when the limit switch c does not detect that the wastewater tank is in place, and allows the cleaning mechanism to start when the limit switch c detects that the wastewater tank is in place.

[0029] The resulting technical effect is that by fixing a limit switch c corresponding to the wastewater tank on the frame, the main control board can automatically detect whether the wastewater tank is in place. If the wastewater tank is not detected to be in place, the cleaning mechanism is prohibited from starting. The cleaning program is only allowed to be executed when the wastewater tank is detected to be in place. This creates an active safety interlock barrier before the cleaning process starts, effectively preventing the cleaning wastewater from splashing everywhere or leaking directly into the equipment and the external environment after being discharged from the outlet due to the absence or improper installation of the wastewater tank. This prevents the wastewater from polluting and damaging the internal electrical components and mechanical structure of the equipment, and also prevents water accumulation on the workbench from affecting operational safety and environmental hygiene.

[0030] Preferably, the liquid supply assembly includes a water inlet connector b, a solenoid three-way valve, a water pump, and a water inlet connector c; The water inlet connector b is used to connect to an external water supply pipeline, the water inlet connector c is used to connect to an external cleaning liquid source, and the water inlet of the water pump is connected to the water inlet connector c. The two inlet ends of the electromagnetic three-way valve are respectively connected to the water inlet connector b and the water outlet of the water pump. The outlet end of the electromagnetic three-way valve constitutes the outlet end of the liquid supply assembly, which is used to selectively output water from the external water supply pipeline or cleaning liquid from the external cleaning liquid source.

[0031] The resulting technical effect is that by connecting the two inlet ends of the electromagnetic three-way valve to the external water supply pipeline and the external cleaning liquid source connected by the water pump, the outlet end can flexibly select to deliver clean water or special cleaning liquid according to the needs of the cleaning process, realizing automatic switching of the liquid supply source and improving the flexibility and automation of cleaning; at the same time, water inlet connector b and water inlet connector c are independently connected to different media sources without interference, providing a reliable liquid supply foundation for the efficient cleaning of subsequent hoppers and conveying pipes.

[0032] Preferably, the diversion assembly includes a main inlet pipe, a diverter, and multiple solenoid valves a and b; One end of the main water inlet pipe is connected to the liquid outlet of the electromagnetic three-way valve, and the other end is connected to the water inlet of the water distributor. The water distributor includes multiple first water outlets and one second water outlet. The multiple first water outlets are respectively connected to the multiple liquid inlets through multiple solenoid valves a to form multiple liquid supply branches. The second water outlet is connected to the liquid inlet of the receiving plate through the solenoid valve b.

[0033] The resulting technical effect is that the water distributor distributes the cleaning fluid from the self-contained water inlet pipe into multiple first outlets and one second outlet. Each of the multiple first outlets is connected to the inlet of each hopper via multiple solenoid valves a, forming multiple independently controllable liquid supply branches. This allows the controller to flexibly select to clean single, multiple, or all hoppers and conveying pipes according to cleaning needs, saving cleaning fluid and adapting to differentiated cleaning requirements under different working conditions. Simultaneously, the second outlet is connected to the inlet hole of the receiving plate via solenoid valve b, enabling independent rinsing control of the receiving plate. This high level of integration and flexible control allows for efficient, economical, and controllable multi-channel cleaning.

[0034] Preferably, the water-blocking assembly includes a servo motor mounting base, a servo motor, two water-blocking plate mounting bases, a rocker arm base, a water-blocking plate, a rocker arm, and a crank. The servo motor is mounted on the frame via the servo motor mounting base, and the two water-blocking plate mounting bases are mounted on the frame at intervals, with the two ends of the water-blocking plate rotatably connected to the two water-blocking plate mounting bases respectively. One end of the crank is fixedly connected to the output shaft of the servo motor, and the other end is rotatably connected to one end of the rocker arm; the other end of the rocker arm is rotatably connected to the water-blocking plate through the rocker arm seat. The controller includes a main control board, which is electrically connected to the servo motor and is used to directly control the rotation of the servo motor. The servo motor is used to drive the water-blocking plate to swing between the closed state and the open state via the crank and the rocker arm. When the water-blocking plate is in the closed state, the water-blocking plate simultaneously abuts against and blocks the outlet of each of the conveying pipes. When the water-blocking plate is in the open state, the water-blocking plate separates from the outlet of each of the conveying pipes.

[0035] The resulting technical effects are as follows: by driving the water-blocking plate to swing via a single set of servo motors and a crank-rocker mechanism, the simultaneous blocking or opening of multiple conveying pipe outlets is achieved. The structure is simple, the transmission is reliable, and the cost is low. In the closed state, the water-blocking plate simultaneously abuts against each outlet, ensuring that each hopper and conveying pipe can form an effective water storage space during the cleaning process, preventing the loss of cleaning fluid and creating the necessary conditions for soaking and dynamic rinsing. In the open state, the water-blocking plate is completely separated from all outlets, ensuring the smooth discharge of cleaning wastewater, and there are no obstructions at the outlets, so as not to affect the normal material discharge.

[0036] This invention also discloses an automatic feeding and metering control method, applied to the aforementioned automatic metering and self-cleaning discharging device for intelligent food preparation, comprising: S1. After the container is placed on the receiving plate, the second weighing sensor is zeroed and calibrated by the controller. S2. Upon receiving the discharge command, control the start of the drive motor corresponding to the target conveying pipe, so that the drive motor drives the corresponding conveying component to rotate, so as to discharge the material in the corresponding hopper into the container through the target conveying pipe; S3. The weight of the material discharged into the container from the target conveying pipe is detected in real time by the second weighing sensor, and the corresponding weighing data information is sent to the controller. S4. When the weight of the material represented by the weighing data information reaches the preset measurement threshold, control the corresponding drive motor to stop rotating.

[0037] Preferably, the automatic metering and self-cleaning discharging device for intelligent food preparation further includes multiple limit switches a, each corresponding to a discharge port of the multiple conveying pipes, and the multiple limit switches a are electrically connected to the controller. Before performing step S2, the method further includes: The first weighing sensor detects the weight of the remaining material in the corresponding hopper and outputs a replenishment prompt when the weight of the remaining material is lower than a preset low threshold. Upon receiving the pre-filling command, at least one of the drive motors is controlled to run for a preset running time or a preset number of rotations, so that the corresponding conveying pipe is pre-filled with material; the limit switch a corresponding to the discharge port of the target conveying pipe is used to detect whether the container is placed in place, and the discharge command is allowed to be generated after the container is detected to be placed in place, and the corresponding drive motor is prohibited from starting when the container is not detected to be placed in place; After the corresponding drive motor stops rotating, the current output weight is recorded, and after the container is detected to have moved away, the second weighing sensor is reset to zero.

[0038] The beneficial technical effects of this invention are as follows: by zeroing the second weighing sensor before discharge to eliminate the influence of the container's own weight, and by having the first weighing sensor monitor the remaining material in real time and automatically prompt for replenishment when the material is low, and by coordinating with the pre-filling command to pre-fill the conveying pipe with material in advance to reduce the empty stroke in the initial stage of discharge, and by using limit switch A to detect that the container is in place before allowing the drive motor to start, effectively preventing material spillage due to missing containers, and by having the second weighing sensor provide real-time closed-loop feedback on the weight of the discharged material during the discharge process and accurately stop the drive motor when the preset threshold is reached, the invention achieves fully automated and precise control of the entire process from monitoring the remaining material, pre-filling, safe start, dynamic metering to stopping and resetting zero, which significantly improves the accuracy, consistency and operational safety of the discharge metering.

[0039] A self-cleaning control method, applied to the aforementioned automatic metering and self-cleaning dispensing device for intelligent food preparation, includes: SS1. Upon receiving a cleaning command, control the water-blocking component to switch from the open state to the closed state to block the outlet of each of the conveying pipes; SS2. Control the liquid supply component to select the liquid supply source, and control the diversion component to open at least one of the liquid supply branches, and inject cleaning liquid into the corresponding hopper and conveying pipe through the liquid inlet corresponding to the opened liquid supply branch; SS3, the drive motor corresponding to the liquid supply branch controlled and turned on operates to drive the corresponding conveying component to rotate and agitate the cleaning liquid in the conveying pipe; SS4. After the preset cleaning conditions are met, the water-blocking component is controlled to switch from the closed state to the open state, so that the cleaning wastewater is discharged from the outlet of the conveying pipe into the wastewater tank and discharged through the drainage channel.

[0040] Preferably, the automatic metering and self-cleaning discharge device for intelligent food preparation further includes a limit switch c disposed at the installation position of the wastewater tank and electrically connected to the controller; Before performing step SS1, the limit switch c is used to check whether the wastewater tank is in place. When the limit switch c detects that the wastewater tank is in place, step SS1 is allowed to be executed; when the limit switch c does not detect that the wastewater tank is in place, cleaning is prohibited and a wastewater tank not in place prompt is output.

[0041] Preferably, in step SS2, the liquid supply branch corresponding to the hopper to be cleaned is turned on sequentially or simultaneously, and the weight of the cleaning liquid injected into the hopper is detected by the corresponding first weighing sensor. When the weight of the cleaning fluid injected into the corresponding hopper reaches the preset injection threshold, the fluid supply branch corresponding to the hopper is shut off.

[0042] Preferably, in step SS3, the drive electric motor corresponding to the conveying pipe to be cleaned is controlled to alternately operate in the forward and reverse directions, so as to drive the corresponding conveying component to rotate alternately in the forward and reverse directions; When the forward and reverse alternating running time, the number of forward and reverse alternating runs of the drive motor, or the number of forward and reverse alternating rotations of the conveying component reaches a preset value, the corresponding drive motor is controlled to stop running.

[0043] Preferably, in step SS4, after the cleaning wastewater in the delivery pipe is discharged, the diversion component is controlled to deliver cleaning fluid to the inlet hole of the receiving plate; The cleaning fluid entering the inlet hole flows through the inner bottom surface of the receiving plate, rinsing the inner bottom surface of the receiving plate, and is discharged from the drain hole in sequence through the fixing ring, the flexible connecting pipe b, the wastewater transfer block, the wastewater connector a and the drain channel.

[0044] The beneficial technical effects of this invention are as follows: Before cleaning, the water-blocking assembly is switched to a closed state to seal all the outlets of the conveying pipes, allowing the injected cleaning fluid to accumulate in the hoppers and conveying pipes to form a soaking space, preventing rapid loss of the cleaning fluid. A safety interlock mechanism, coupled with limit switch C detecting the wastewater tank's position before allowing the cleaning program to start, prevents wastewater overflow and environmental pollution. During the injection process, a first weighing sensor uses a real-time closed-loop detection system to monitor the weight of the cleaning fluid injected into each hopper and automatically shuts off the corresponding supply branch when a preset threshold is reached, achieving precise control of the injection volume in each channel. It provides precise control without the need for an additional flow meter, and flexibly adapts to single-channel or multi-channel cleaning needs by sequentially or simultaneously opening the liquid supply branches. Based on soaking, it further controls the drive motor to alternately rotate forward and reverse to drive the conveying component to rotate in both directions, causing the cleaning liquid in the pipe cavity to generate reciprocating turbulence. This repeatedly flushes the sides of the conveying component blades, the pipe wall, and the vicinity of the discharge port in multiple directions, greatly improving the removal effect of adhering materials. After drainage, the inner bottom surface of the receiving plate is rinsed separately to avoid residual liquid affecting the subsequent weighing accuracy, significantly reducing the frequency of manual disassembly and cleaning and equipment downtime. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural diagram of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 2 This is an exploded structural diagram of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 3 This is a schematic diagram of the frame and housing assembly of the automatic metering and self-cleaning dispensing device for intelligent food preparation according to the present invention. Figure 4 This is a schematic diagram of the material feeding mechanism of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 5 This is a schematic diagram of the short auger feeding component of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 6 This is a schematic diagram of the long auger feeding component of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 7 This is a schematic diagram of the pipeline connection structure of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 8 This is a schematic diagram of the stirring mechanism of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 9 This is a schematic diagram of the stirring component of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 10This is a schematic diagram of the flipping component structure of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 11 This is a schematic diagram of the weighing component of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 11a for Figure 11 Exploded view; Figure 12 This is a schematic diagram of the cleaning mechanism of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 12a for Figure 12 Internal piping diagram; Figure 13 This is a schematic diagram of the water collection component of the automatic metering and self-cleaning dispensing device for intelligent food preparation according to the present invention. Figure 14 This is a schematic diagram of the water-blocking component of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 15 This is a schematic diagram of the controller structure of the automatic metering and self-cleaning discharging device for intelligent food preparation according to the present invention. Figure 16 This is a flowchart of the automatic material feeding and metering control method of the present invention; Figure 17 This is a flowchart of the self-cleaning control method of the present invention.

[0046] 1. Body structure; 11. Stirring mechanism; 111. Stirring assembly; 1111. Stirring motor; 1112. Coupling; 1113. Magnet; 1114. Stirring rod; 112. Cover plate; 113. Support base; 114. Upper housing; 12. Tilting assembly; 121. Hinge a; 122. Slide bar connecting block; 123. Slide bar; 124. Guide rail; 13. Housing assembly; 131. Top plate; 132. Front plate; 133. Side plate a; 134. Limit switch fixing plate; 135. Bottom mounting plate; 136. Side plate b; 137. Rear plate; 138. Side plate c; 139. Narrow plate; 14. Frame; 2. Material feeding mechanism, 2001. Hopper, 2002. Liquid inlet, 2003. Hopper support, 2004. Clamp, 2005. Flexible connecting pipe, 2006. First weighing sensor, 2007. End cap, 2008. Universal coupling, 2009. Drive motor, 21. Short auger feeding assembly, 2101. Short auger pipe, 2102. Short auger, 22. Long auger feeding assembly, 2201. Long auger pipe 2202. Long auger, 23. First fixing plate, 24. Second fixing plate, 25. First fixing block, 26. Second fixing block, 27. Weighing assembly, 270. Container, 271. Leakage plate, 272. Support plate, 273. Pad, 274. Weighing fixing block, 275. Second weighing sensor, 276. Wastewater transfer block, 277. Wastewater connector a, 278. Flexible connecting pipe b, 279. Fixing ring; 3. Cleaning mechanism, 31. Cleaning components, 310. Water pipe assembly, 3101. Outlet pipe a, 3102. Outlet pipe b, 3103. Connecting pipe a, 3104. Connecting pipe b, 3105. Connecting pipe c, 3106. Wastewater pipe, 3107. Main inlet pipe, 311. Inlet connector b, 312. Solenoid three-way valve, 313. Outlet connector b, 314. Water pump, 315. Distributor fixing block, 316. Distributor, 31 7. Solenoid valve assembly, 3171. Solenoid valve a, 3172. Solenoid valve b, 3173. Solenoid valve mounting plate, 318. Inlet connector c, 32. Water collection assembly, 321. Wastewater tank, 322. Filter screen tube mounting base, 323. Filter screen tube, 33. Water blocking assembly, 331. Steering gear mounting base, 332. Steering gear, 333. Water blocking plate mounting base, 334. Rocker arm seat, 335. Water blocking plate, 336. Rocker arm, 337. Crank; 4. Controller, 401. Limit switch a, 402. Limit switch b, 403. Limit switch c, 41. Control box, 42. Power module, 43. Motor drive board, 44. Relay module, 45. Weighing module, 46. Hinge b, 47. Box door, 48. Main control board, 49. Switch. Detailed Implementation

[0047] 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.

[0048] See the appendix of this invention. Figures 1 to 17 According to an embodiment of the present invention, an automatic metering and self-cleaning dispensing device for intelligent food preparation includes a body mechanism 1, a dispensing mechanism 2, a cleaning mechanism 3, and a controller 4. like Figure 2 As shown, the machine body mechanism 1 includes a frame 14 and a housing assembly 13. The frame 14 serves as the main load-bearing structure of the device, providing a mounting base for the unloading mechanism 2, the cleaning mechanism 3, and the controller 4. The housing assembly 13 is fixedly mounted on the outer surface of the frame 14, serving to shield and protect the unloading mechanism 2, the cleaning mechanism 3, and related electrical components inside the frame 14.

[0049] like Figure 3 As shown, the housing assembly 13 includes a top plate 131, a front plate 132, side plates a133, a limit switch fixing plate 134, a bottom mounting plate 135, side plates b136, a rear plate 137, side plates c138, and a narrow plate 139. The top plate 131 is fixedly mounted on the top of the frame 14; the front plate 132 is fixedly mounted on the front outer surface of the frame 14; the two side plates a133 are respectively fixedly mounted on the left and right sides of the frame 14; the limit switch fixing plate 134 is located below the front plate 132 and fixedly mounted on the frame 14; the bottom mounting plate 135 is fixedly mounted in the lower part of the interior of the frame 14; the side plate b136 is located below one of the side plates a133 and fixedly mounted on the frame 14, and the side plate c138 is located below the other side plate a133 and fixedly mounted on the frame 14; the rear plate 137 is fixedly mounted at the rear of the frame 14; and the narrow plate 139 is fixedly mounted in the lower part of the front of the frame 14.

[0050] The top plate 131, front plate 132, side plate a133, side plate b136, rear plate 137, side plate c138, narrow plate 139 and bottom mounting plate 135 together form the external housing structure of the device. Each plate can be connected to the frame 14 by screws, bolts, riveting or other suitable fixing methods.

[0051] like Figure 1 and Figure 2 As shown, the unloading mechanism 2 is located inside the frame 14 and is used to store and transport semi-solid small materials. The cleaning mechanism 3 is located below the unloading mechanism 2 and is used to supply cleaning water and cleaning fluid into the unloading mechanism 2. The controller 4 is located behind the unloading mechanism 2 and is fixedly installed on the frame 14, and is used to control the operation of the unloading mechanism 2 and the cleaning mechanism 3.

[0052] like Figures 4 to 6 As shown, in this embodiment, the material feeding mechanism 2 includes three short auger feeding assemblies 21 and three long auger feeding assemblies 22, for a total of six auger feeding assemblies. The three short auger feeding assemblies 21 and the three long auger feeding assemblies 22 are arranged alternately side by side.

[0053] Each short auger discharge assembly 21 and each long auger discharge assembly 22 includes a hopper 2001, a liquid inlet 2002, a hopper support 2003, a clamp 2004, a flexible connecting pipe 2005, a first weighing sensor 2006, an end cap 2007, a universal coupling 2008, and a drive motor 2009.

[0054] The short auger unloading assembly 21 also includes a short auger tube 2101 and a short auger 2102 disposed inside the short auger tube 2101. The long auger unloading assembly 22 also includes a long auger tube 2201 and a long auger 2202 disposed inside the long auger tube 2201. The length of the short auger tube 2101 is less than the length of the long auger tube 2201, and the length of the short auger 2102 is less than the length of the long auger 2202.

[0055] The axes of the three short auger pipes 2101 and the three long auger pipes 2201 are parallel to each other and located in the same horizontal plane. The discharge ports of the six auger pipes are flush with each other, and the end faces of the six discharge ports are located in the same plane and are arranged side by side horizontally above the receiving area. Due to the different lengths of the short auger pipes 2101 and the long auger pipes 2201, the ends of each auger pipe away from the discharge port and the drive motor 2009 installed at those ends are staggered along the axial direction of the auger pipes. By adopting a structure in which the short auger pipes 2101 and the long auger pipes 2201 are arranged alternately side by side, the six discharge ports are flush with each other, which facilitates the centralized installation of the weighing assembly 27, the water collection assembly 32, and the water blocking assembly 33 below the six discharge ports.

[0056] In each material feeding assembly, the hopper 2001 is located above the corresponding assembly. The hopper support 2003 is located below the hopper 2001 and is used to support the hopper 2001. The first weighing sensor 2006 is fixed below the hopper support 2003, and the hopper 2001, hopper support 2003 and first weighing sensor 2006 are arranged sequentially in the vertical direction.

[0057] When the device is placed horizontally, the projection of the overall center of mass of the hopper 2001 onto the horizontal plane is located within the installation support area of ​​the corresponding hopper support 2003, so that the hopper 2001 can be stably supported on the hopper support 2003 and the weight of the hopper 2001 and the material inside it can be effectively transferred to the first weighing sensor 2006.

[0058] The liquid inlet 2002 or water inlet connector is fixedly installed near the top of the hopper 2001 and communicates with the interior of the hopper 2001. During the cleaning process, both cleaning water and cleaning fluid enter the interior of the hopper 2001 through the liquid inlet 2002.

[0059] The discharge port at the lower end of the hopper 2001 is connected to the inlet of the corresponding auger tube via a flexible connecting pipe 2005 (silicone tube). For the short auger discharge assembly 21, one end of the flexible connecting pipe 2005 is sleeved on the discharge port of the hopper 2001, and the other end is sleeved on the inlet of the short auger tube 2101; for the long auger discharge assembly 22, one end of the flexible connecting pipe 2005 is sleeved on the discharge port of the hopper 2001, and the other end is sleeved on the inlet of the long auger tube 2201.

[0060] Clamps 2004 are respectively fitted onto both ends of the flexible connecting pipe 2005 to fix the flexible connecting pipe 2005 to the discharge port of the hopper 2001 and the inlet of the corresponding auger pipe. The flexible connecting pipe 2005 forms a flexible material channel between the hopper 2001 and the auger pipe.

[0061] Because the flexible connecting pipe 2005 is flexible, it can isolate and weaken the mechanical vibrations generated during the operation of the drive motor 2009 and the short auger 2102 or long auger 2202, reducing the transmission of vibrations to the hopper 2001 and the first weighing sensor 2006. At the same time, the flexible connecting pipe 2005 is relatively soft, which can reduce the additional support or constraint exerted on the hopper 2001 by the auger pipe, fixing plate, and other lower connecting parts through the material channel, allowing the weight of the hopper 2001 to be mainly borne by the first weighing sensor 2006. This facilitates the first weighing sensor 2006 in detecting the actual remaining weight of small materials in the hopper 2001.

[0062] It should be noted that components such as the auger pipe and motor are mounted on the frame, and this weight load will not act on the first weighing sensor 2006.

[0063] A short auger 2102 is disposed inside a short auger tube 2101, and a long auger 2202 is disposed inside a long auger tube 2201. The axis of the short auger 2102 coincides with the axis of the short auger tube 2101, and the axis of the long auger 2202 coincides with the axis of the long auger tube 2201. The short auger 2102 and the long auger 2202 are used to push the material in their respective auger tubes toward the discharge end.

[0064] End cap 2007 is fixedly installed at the end of short auger tube 2101 or long auger tube 2201 near the feed inlet. It is used to seal and support the end of the corresponding auger tube. If necessary, it has bearing mounting holes for the shaft to pass through to establish the transmission relationship between the auger, coupling and motor. Drive motor 2009 is located on the side of end cap 2007 away from the corresponding auger tube. The output shaft of drive motor 2009 is substantially coincident with the axis of the corresponding auger tube.

[0065] One end of the universal coupling 2008 is fixedly connected to the short auger 2102 or the long auger 2202, and the other end is fixedly connected to the output shaft of the corresponding drive motor 2009. When the drive motor 2009 starts, it drives the short auger 2102 or the long auger 2202 to rotate through the universal coupling 2008, causing the material in the hopper 2001 to enter the corresponding auger tube and be discharged from the discharge end.

[0066] The universal coupling 2008 can accommodate installation errors and shaft deviations between the drive motor 2009 and the corresponding auger, reducing the impact of shaft misalignment on power transmission and auger operation stability.

[0067] like Figure 4 and Figure 7 As shown, the material feeding mechanism 2 also includes a first fixing plate 23, a second fixing plate 24, two first fixing blocks 25, and two second fixing blocks 26. The first fixing plate 23 and the second fixing plate 24 are both rectangular plate structures and are arranged back and forth at intervals along the axial direction of the short auger pipe 2101 and the long auger pipe 2201, wherein the first fixing plate 23 is located in front of the second fixing plate 24.

[0068] The first fixing plate 23 and the second fixing plate 24 each have six circular mounting holes on their surfaces. The six circular mounting holes on the first fixing plate 23 correspond one-to-one with the six circular mounting holes on the second fixing plate 24, and the central axes of the corresponding two circular mounting holes coincide.

[0069] Three short auger tubes 2101 and three long auger tubes 2201 pass sequentially through corresponding circular mounting holes on the first fixing plate 23 and the second fixing plate 24. The diameter of the circular mounting holes is adapted to the outer diameter of the corresponding auger tube, so that the first fixing plate 23 and the second fixing plate 24 can jointly provide radial support and radial limit for each auger tube.

[0070] Two first fixing blocks 25 are respectively fixedly installed on the frame 14, and the two ends of the first fixing plate 23 are respectively fixedly installed on the two second fixing blocks 25. Two second fixing blocks 26 are respectively fixedly installed on the frame 14, and the two ends of the second fixing plate 24 are respectively fixedly installed on the two second fixing blocks 26.

[0071] By using the first fixing plate 23 and the second fixing plate 24 to form two axially spaced support positions for each auger pipe, the radial offset and sway of the short auger pipe 2101 and the long auger pipe 2201 during operation can be reduced, thereby improving the installation stability of the auger pipes. The first fixing plate 23 and the second fixing plate 24 are respectively connected to the frame 14 through the second fixing block 25 and the second fixing block 26, which facilitates the assembly and maintenance of the auger pipes, fixing plates and frame 14.

[0072] like Figure 2As shown, the machine body mechanism 1 also includes a stirring mechanism 11. The stirring mechanism 11 is located above the material feeding mechanism 2 and is used to stir and agitate the semi-solid small materials in the hopper 2001.

[0073] like Figure 8 As shown, in this embodiment, the stirring mechanism 11 includes six stirring components 111, a cover plate 112, multiple support seats 113, and an upper housing 114. The upper housing 114 has a box structure with an open top and is connected to the frame 14. The six stirring components 111 are arranged in two rows and three columns, and each of the six stirring components 111 corresponds to one of the six hoppers 2001.

[0074] Four support bases 113 are fixedly installed at the four corners of the upper bottom plate inside the upper housing 114. The cover plate 112 is located at the upper opening of the upper housing 114 and is fixedly connected to the upper housing 114 through the support bases 113, and is used to cover the internal space of the upper housing 114.

[0075] like Figure 9 As shown, each stirring assembly 111 includes a stirring motor 1111, a coupling 1112, a magnet 1113, and a stirring rod 1114. The stirring motor 1111 is fixedly mounted on the bottom plate inside the upper housing 114, and the output shaft of the stirring motor 1111 is fixedly connected to one end of the coupling 1112.

[0076] The other end of the coupling 1112 has a mounting cavity, and the magnet 1113 is fixedly installed in the mounting cavity of the coupling 1112. One end of the stirring rod 1114 is magnetically attracted to the mounting cavity of the coupling 1112 and is attracted and fixed with the magnet 1113; the other end of the stirring rod 1114 extends downward into the interior of the corresponding hopper 2001.

[0077] The magnet is used to provide a vertical connection and fixation between the stirring rod and the coupling.

[0078] Based on the keyway fit between the coupling and the stirring rod, the coupling has a slot and the stirring rod has a corresponding protrusion to achieve torque transmission.

[0079] When the stirring motor 1111 starts, it drives the stirring rod 1114 to rotate through the coupling 1112 and the magnet 1113, so that the stirring rod 1114 stirs, disturbs or breaks the semi-solid small materials in the hopper 2001, thereby reducing material agglomeration, stratification and bridging, and improving the uniformity and continuity of the material when entering the auger pipe.

[0080] The stirring rod 1114 is detachably connected to the coupling 1112 via magnet 1113. After opening the upper housing 114, the operator can directly remove the stirring rod 1114 from the mounting cavity of the coupling 1112, facilitating the cleaning, disinfection, and replacement of the stirring rod 1114.

[0081] like Figure 8 As shown, the body mechanism 1 also includes two sets of tilting components 12. Both sets of tilting components 12 are located on the same side of the upper housing 114 and are spaced apart and symmetrically arranged along the extension direction of that side, for supporting and guiding the stirring mechanism 11 to open and close.

[0082] like Figure 10 As shown, each set of flipping components 12 includes a hinge a121, a slider connecting block 122, a slider 123, and a guide rail 124. The guide rail 124 is arranged vertically and is fixedly mounted on the frame 14 via the front plate 132; the slider 123 is slidably embedded in the guide rail 124 and can move up and down along the guide rail 124.

[0083] The slider connecting block 122 is fixedly installed on the upper end of the slider 123. One end of the hinge a121 is fixedly connected to the side wall of the upper housing 114, and the other end of the hinge a121 is connected to the slider connecting block 122, so that the upper housing 114 can be rotated relative to the slider connecting block 122 through the hinge a121.

[0084] When in use, a person needs to stand behind the machine (on one side of the control box 4) to lift the upper box 114, then flip it over and move it vertically downwards. The hinge 121 has a fixed opening and closing angle to prevent the upper box 114 from flipping over. Then, the material is replenished. After the material replenishment is completed, the upper box 114 is lifted and flipped to a horizontal state, and then moved vertically downwards to place the upper box 114.

[0085] When opening the stirring mechanism 11, the upper housing 114, the sliding block 122 and the sliding bar 123 need to be moved vertically upward along the guide rail 124 first, so that the stirring rod 1114 exits from the corresponding hopper 2001 and forms a clearance space; after the upper housing 114 rises to the preset height, the upper housing 114 is then flipped open around the hinge axis of the hinge a121.

[0086] When closing the stirring mechanism 11, the upper housing 114 needs to be rotated around the hinge a121 to a basically horizontal position first, and then the upper housing 114 is moved downward along the guide rail 124 with the slide bar connecting block 122 and the slide bar 123, so that the stirring rod 1114 extends into the corresponding hopper 2001.

[0087] By adopting a structure that first lifts vertically and then flips open, space can be provided for the stirring rod 1114 that extends into the hopper 2001 when the upper shell 114 is opened, reducing interference and collision between the upper shell 114, the stirring rod 1114 and the edge of the hopper 2001, and facilitating the disassembly, cleaning and maintenance of the hopper 2001, the stirring rod 1114 and other internal components.

[0088] like Figure 11As shown, the material feeding mechanism 2 also includes a weighing component 27. The weighing component 27 is located in front of the material feeding mechanism 2 and below the discharge ports of the six auger pipes, and is used to receive and weigh the material discharged from each auger pipe discharge port.

[0089] The weighing assembly 27 includes a perforated plate 271, a receiving plate 272, a pad 273, a weighing fixing block 274, a second weighing sensor 275, a wastewater adapter block 276, a wastewater connector a 277, a silicone tube b 278, and a fixing ring 279. The weighing fixing block 274 is fixedly mounted on the frame 14. The lower surface of the second weighing sensor 275 is connected to the weighing fixing block 274 via the pad 273, and the upper surface of the second weighing sensor 275 is connected to the receiving plate 272 via another pad 273, thereby supporting the receiving plate 272 on the frame 14 through the second weighing sensor 275.

[0090] The second load cell 275 actually weighs two objects: one is the external receiving container 270 (paper cup), which the load cell 275 detects when the weight changes after the cup is placed on it, and the other is the weight of small pieces of material falling into the container 270. Other components can be directly calibrated after assembly, bypassing the program, and are therefore unaffected by these components.

[0091] The receiving plate 272 has a long, box-like structure with an open top, and the perforated plate 271 is detachably installed at the upper opening of the receiving plate 272. During normal discharge, the external receiving container 270 is placed on the perforated plate 271, and the discharge ports of the six auger pipes correspond to the corresponding receiving positions of the receiving container 270.

[0092] The perforated plate 271 has leakage holes corresponding to the positions of each discharge port. The perforated plate 271 is used to support the receiving container 270, and the vertical projection of each discharge port is located within the cup opening range of the receiving container 270. After the receiving container 270 is removed, the liquid remaining at the discharge port can flow into the receiving plate 272 through the leakage holes.

[0093] A cleaning water inlet hole is provided on one side wall of the receiving plate 272, and the cleaning water inlet hole is sealed to the water outlet pipe a3101 of the cleaning mechanism 3. A drain hole is provided at the bottom of the end of the receiving plate 272 away from the cleaning water inlet hole, and a fixing ring 279 is fixedly installed in the drain hole and communicates with the interior of the receiving plate 272. The inner bottom surface of the receiving plate 272 is inclined towards the drain hole, so that the cleaning water entering the interior of the receiving plate 272 can collect in the drain hole.

[0094] Wastewater adapter block 276 is fixedly installed on frame 14 and located below fixing ring 279. The upper end of flexible connecting pipe b278 is fixedly connected to fixing ring 279, and the lower end of flexible connecting pipe b278 is fixedly connected to the inlet of wastewater adapter block 276. Wastewater connector a277 is fixedly connected to the outlet of wastewater adapter block 276 for connection to wastewater pipe 3106.

[0095] The flexible connecting pipe b278 forms a flexible drainage connection between the receiving plate 272 and the wastewater transfer block 276 fixedly installed on the frame 14. Because the flexible connecting pipe b278 (silicone pipe) is relatively soft, it reduces the additional support, tension, or rigid constraint exerted on the receiving plate 272 by the wastewater transfer block 276, wastewater connector a277, wastewater pipe 3106, and other lower connecting parts. This allows the load on the receiving plate 272 to be primarily transferred to the frame 14 through the second weighing sensor 275, thereby reducing the impact of the lower connecting structure of the receiving plate 272 on the accuracy of the second weighing sensor 275 in detecting the weight of the dropped material.

[0096] During the quantitative discharge process, the receiving container 270 is placed on the perforated plate 271. The second weighing sensor 275 detects the increased weight of the material in the receiving container 270 and sends the weighing value information to the controller 4. When the detected weight reaches the preset discharge weight, the controller 4 controls the corresponding drive motor 2009 to stop running.

[0097] like Figure 2 As shown, the cleaning mechanism 3 includes a cleaning component 31. The cleaning component 31 is located below the unloading mechanism 2 and is fixedly mounted on the frame 14.

[0098] like Figure 12 As shown, the cleaning assembly 31 includes a water pipe assembly 310, an inlet connector b311, a solenoid three-way valve 312, an outlet connector b313, a water pump 314, a distributor fixing block 315, a distributor 316, a solenoid valve assembly 317, and an inlet connector c318. The water pipe assembly 310 includes an outlet pipe a3101, an outlet pipe b3102, a connecting pipe a3103, a connecting pipe b3104, a connecting pipe c3105, a wastewater pipe 3106, and a main inlet pipe 3107.

[0099] The solenoid valve assembly 317 includes six solenoid valves a3171, one solenoid valve b3172, and a solenoid valve mounting plate 3173. The six solenoid valves a3171 and solenoid valve b3172 are all fixedly mounted on the solenoid valve mounting plate 3173, which is fixedly mounted on the frame 14.

[0100] The water inlet connector b311 is fixedly mounted on the side plate b136. One end of the water inlet connector b311 is used to connect to an external tap water pipe, and the other end is connected to one end of the connecting pipe b3104. The other end of the connecting pipe b3104 is connected to one water inlet port of the solenoid three-way valve 312. The normally open port of the solenoid three-way valve 312 is connected to one end of the main water inlet pipe 3107, and the other end of the main water inlet pipe 3107 is connected to the water inlet of the distributor 316. The distributor 316 is fixedly mounted on the frame 14 by the distributor fixing block 315.

[0101] like Figure 7 and Figure 12 As shown, in this embodiment, the water distributor 316 has six first water outlets for hopper cleaning and one second water outlet for receiving plate cleaning. The six hopper cleaning water outlets are respectively connected to the inlets of six solenoid valves a3171, the outlets of the six solenoid valves a3171 are respectively connected to one end of six water outlet pipes b3102, and the other ends of the six water outlet pipes b3102 are respectively connected to the liquid inlets 2002 on the six hoppers 2001.

[0102] The inlet of solenoid valve b3172 is connected to another outlet of water distributor 316, the outlet of solenoid valve b3172 is connected to one end of outlet pipe a3101, and the other end of outlet pipe a3101 is sealed to the cleaning inlet hole of receiving plate 272.

[0103] The normally closed port of the electromagnetic three-way valve 312 is connected to one end of the connecting pipe a3103, and the other end of the connecting pipe a3103 is connected to the outlet of the water pump 314. The inlet of the water pump 314 is connected to one end of the connecting pipe c3105, and the other end of the connecting pipe c3105 is connected to the inlet connector c318. The inlet connector c318 is fixedly installed on the side plate b136 and is used to connect to an external cleaning fluid source.

[0104] When water from the external water supply line is needed for cleaning, the electromagnetic three-way valve 312 remains in the default state, allowing the external water source to enter each cleaning branch sequentially through the water inlet connector b311, connecting pipe b3104, electromagnetic three-way valve 312, main water inlet pipe 3107 and water distributor 316.

[0105] When cleaning is required using cleaning fluid from an external cleaning fluid source, the controller 4 starts the water pump 314 and controls the solenoid three-way valve 312 to switch to the interface connected to the connecting pipe a3103, so that the cleaning fluid enters each cleaning branch sequentially through the water inlet connector c318, connecting pipe c3105, water pump 314, connecting pipe a3103, solenoid three-way valve 312, main water inlet pipe 3107 and water distributor 316.

[0106] In this embodiment, the drainage pipeline includes a fixed ring 279, a silicone tube b278, a wastewater adapter block 276, a wastewater connector a277, a wastewater pipe 3106, and a water outlet connector b313 connected in sequence. The water outlet connector b313 is fixedly installed on the rear plate 137, with one end connected to the wastewater pipe 3106 and the other end used to connect to an external wastewater pipeline.

[0107] By switching the liquid supply source using the solenoid three-way valve 312, clean water or cleaning fluid can be selected according to the cleaning program; by controlling the six solenoid valves a3171 respectively, cleaning fluid can be selectively injected into one, several or all of the hoppers 2001; by controlling the solenoid valve b3172, water can be injected into the receiving plate 272 to rinse the receiving plate 272.

[0108] like Figure 13 As shown, the cleaning mechanism 3 also includes a water collection component 32. The water collection component 32 is detachably mounted above the perforated plate 271 of the weighing component 27 and located below the discharge ports of the six auger pipes, for collecting the cleaning wastewater generated by the cleaning discharge mechanism 2. The water collection component 32 includes a wastewater tank 321, a filter screen tube fixing seat 322, and a filter screen tube 323. The wastewater tank 321 has an open-top structure and is used to receive the cleaning wastewater discharged from the discharge ports of the six auger pipes.

[0109] The wastewater tank 321 has a drain hole at its bottom, and a filter screen tube 323 is installed at the drain hole and extends upward into the wastewater tank 321. The filter screen tube 323 has multiple filter holes on its wall for filtering solid materials and residues from the wastewater. A filter screen tube mounting base 322 is fixedly installed on the outer bottom of the wastewater tank 321 and communicates with the drain hole. A perforated plate 271 has clearance holes for the filter screen tube mounting base 322 to pass through. After the wastewater tank 321 is installed in place, the filter screen tube mounting base 322 passes through the clearance holes on the perforated plate 271 and is inserted downward into the retaining ring 279.

[0110] After entering the wastewater tank 321, the cleaning wastewater flows sequentially through the filter screen tube 323, filter screen tube fixing seat 322, fixing ring 279, silicone tube b278, wastewater adapter block 276, wastewater connector a277, wastewater pipe 3106, and outlet connector b313, and is discharged through the external wastewater pipe connected to the outlet connector b313. The filter screen tube 323 can intercept larger solid residues in the cleaning wastewater, reducing the risk of solid residues entering the wastewater pipe 3106 and the external wastewater pipe and causing blockages.

[0111] When cleaning is required, place the wastewater tank 321 in place. After cleaning is completed, remove the wastewater tank 321 and clean the residue inside the wastewater tank 321 and the attachments on the filter screen tube 323.

[0112] like Figure 14As shown, the cleaning mechanism 3 also includes a water-blocking assembly 33. The water-blocking assembly 33 is located below the discharge ports of the six auger pipes and is used to simultaneously open or block the discharge ports of the six auger pipes. The water-blocking assembly 33 includes a servo motor mounting base 331, a servo motor 332, two water-blocking plate mounting bases 333, a rocker arm base 334, a water-blocking plate 335, a rocker arm 336, and a crank 337.

[0113] A servo mount 331 is fixedly mounted on the front plate 132 and then fixed to the frame 14 via the front plate 132. The servo 332 is fixedly mounted on the servo mount 331. One end of a crank 337 is fixedly connected to the output shaft of the servo 332, allowing the crank 337 to rotate around the output shaft of the servo 332. The other end of the crank 337 is rotatably connected to one end of a rocker arm 336, and the other end of the rocker arm 336 is rotatably connected to a rocker arm seat 334, which is fixedly mounted on the upper surface of the water-blocking plate 335. Two water-blocking plate mounting seats 333 are respectively fixedly mounted on the frame 14 and located at both ends of the water-blocking plate 335. Both ends of the water-blocking plate 335 are rotatably connected to their corresponding water-blocking plate mounting seats 333, allowing the water-blocking plate 335 to swing around its own axis of rotation.

[0114] When the servo motor 332 is running, it drives the water blocking plate 335 to swing through the crank 337, rocker arm 336 and rocker arm seat 334. When the water blocking plate 335 swings to directly below the six auger pipe outlets, the water blocking plate 335 blocks the six outlets; when the water blocking plate 335 swings outward and moves away from below the outlets, the six outlets are open.

[0115] During the cleaning process, the controller 4 moves the water-blocking plate 335 to the blocking position, so that each hopper 2001, the corresponding flexible connecting pipe 2005, each auger pipe, and the water-blocking plate 335 together form a water storage cleaning space. After the cleaning water or cleaning fluid enters the hopper 2001 and the auger pipe, it can be temporarily stored in the pipe cavity, preventing the cleaning fluid from being directly lost from the outlet.

[0116] During the cleaning process, the controller 4 controls the corresponding drive motor 2009 to drive the short auger 2102 or the long auger 2202 to rotate, so that the cleaning fluid in the pipe cavity is disturbed by the auger blades, and the hopper 2001, auger pipe, auger and the area near the discharge port are soaked and rinsed.

[0117] After cleaning, the controller 4 controls the servo motor 332 to run in reverse, so that the water blocking plate 335 moves away from below the six discharge ports, and the cleaning wastewater is discharged into the wastewater tank 321 from the discharge ports.

[0118] like Figure 15 and Figure 2As shown, the controller 4 includes a control box 41, a power supply module 42, a motor drive board 43, a relay module 44, a weighing module 45, a hinge b 46, a door 47, a main control board 48, a switch 49, a limit switch a 401, a limit switch b 402, and a limit switch c 403.

[0119] The control box 41 is fixedly mounted on the frame 14 and located behind the unloading mechanism 2. The power module 42, motor drive board 43, relay module 44, weighing module 45 and main control board 48 are respectively installed inside the control box 41.

[0120] The power output terminal of the power module 42 is connected to the power supply ports of the motor drive board 43, the relay module 44, the weighing module 45 and the main control board 48 respectively, and is used to provide working power to each electrical component.

[0121] The main control board 48 is electrically connected to limit switches a401, b402, c403, motor drive board 43, relay module 44, weighing module 45 and servo motor 332 respectively. It is used to receive the detection signals of each limit switch and the weighing data information output by the weighing module 45, and send control commands to motor drive board 43, relay module 44 and servo motor 332.

[0122] The weighing module 45 is electrically connected to six first weighing sensors 2006 and second weighing sensors 275, respectively, and is used to collect and process the weighing data information output by each weighing sensor. The motor drive board 43 is electrically connected to six drive motors 2009, respectively, and is used to drive the corresponding drive motors 2009 to run according to the control commands of the main control board 48.

[0123] The relay module 44 is electrically connected to six stirring motors 1111, a solenoid three-way valve 312, six solenoid valves a3171 and b3172, and a water pump 314. The main control board 48 controls the on / off state of the six stirring motors 1111 and each fluid control component through the relay module 44. The servo motor 332 is directly electrically connected to the main control board 48, and the main control board 48 directly sends rotation control signals to the servo motor 332 to control the water blocking plate 335 to switch between the blocking position and the open position.

[0124] The door 47 is hinged to the opening of the control box 41 via hinge b46. The display interface of the main control board 48 is located at the opening of the door 47, so that the display interface is exposed on the outer surface of the door 47. The switch 49 is fixedly installed through the side wall of the control box 41 and is used to control the power supply of the device.

[0125] like Figure 7As shown, six limit switches a401 are respectively set at the positions corresponding to the six auger tube outlets to detect whether the receiving container 270 is placed in place. When the receiving container 270 triggers the corresponding limit switch a401, the main control board 48 allows the corresponding drive motor 2009 to start; when the corresponding limit switch a401 is not triggered, the main control board 48 prohibits the corresponding drive motor 2009 from starting.

[0126] like Figure 8 As shown, limit switch b402 is fixedly installed at the opening of top plate 131 to detect whether the upper housing 114 of the stirring mechanism 11 is closed. When the upper housing 114 leaves the closed position, limit switch b402 sends a detection signal to main control board 48. Main control board 48 cuts off the power supply to the six stirring motors 1111 through relay module 44, causing the six stirring motors 1111 to stop rotating or not start. When the upper housing 114 is closed, main control board 48 allows relay module 44 to connect the power supply circuit of the six stirring motors 1111.

[0127] like Figure 13 As shown, the limit switch c403 is fixedly installed at the mounting hole of the side plate c138 to detect whether the wastewater tank 321 in the water collection assembly 32 is placed in place. When the wastewater tank 321 is not placed in place, the main control board 48 prohibits the cleaning mechanism 3 from starting; when the wastewater tank 321 is placed in place and triggers the limit switch c403, the main control board 48 allows the self-cleaning program to be executed.

[0128] like Figure 16 As shown, based on the above-mentioned automatic metering and self-cleaning discharging device for intelligent food preparation, the present invention also provides an automatic discharging metering control method, which includes the following steps.

[0129] S1, Zeroing calibration procedure.

[0130] After the receiving container 270 is placed on the perforated plate 271 of the receiving plate 272, the main control board 48 performs zero calibration on the second weighing sensor 275 through the weighing module 45 to eliminate the influence of the initial weight of the receiving plate 272, the perforated plate 271, and the receiving container 270 on the weight detection of the material being discharged. The first weighing sensor 2006 is used to detect the actual weight of the remaining material in the corresponding hopper 2001, and therefore does not perform this zero calibration along with the second weighing sensor 275.

[0131] Before performing step S2, the device also performs residual material monitoring and pre-filling auxiliary steps.

[0132] Residual material monitoring is a continuous monitoring process during the operation of the device. Six first weighing sensors 2006 detect the weight of the corresponding hopper 2001 and the material inside it, and send the weighing data to the main control board 48 through the weighing module 45. When the weight of the residual material in any hopper 2001 is lower than the preset low threshold, the main control board 48 outputs a replenishment prompt through the display and operation interface.

[0133] Upon receiving the pre-filling instruction, the main control board 48 controls at least one drive motor 2009 to run for a preset time or a preset number of rotations via the motor drive board 43, causing the corresponding short auger 2102 or long auger 2202 to rotate, pre-transporting the material in the hopper 2001 into the corresponding auger tube to reduce empty strokes caused by insufficient material in the auger tube during the initial stage of formal metering and discharging. Residual material monitoring is a continuously executed background process, and there is no strict order between it and the pre-filling auxiliary steps.

[0134] Before executing step S2, the receiving container 270 is checked to see if it is in place by the limit switch a401 corresponding to the discharge port of the target auger pipe. When the corresponding limit switch a401 detects that the receiving container 270 is in place, the main control board 48 allows the generation and execution of the corresponding discharge command; when the corresponding limit switch a401 does not detect that the receiving container 270 is in place, the main control board 48 prohibits the corresponding drive motor 2009 from starting.

[0135] S2, Metering and Discharge Steps.

[0136] After receiving the discharge command, the main control board 48 controls the drive motor 2009 corresponding to the target auger tube to start via the motor drive board 43. The drive motor 2009 drives the corresponding short auger 2102 or long auger 2202 to rotate via the universal coupling 2008, so that the material in the corresponding hopper 2001 enters the target auger tube through the flexible connecting pipe 2005, and is discharged into the receiving container 270 from the discharge port of the target auger tube.

[0137] S3, Real-time weighing procedure.

[0138] During the process of material being discharged into the receiving container 270, the second weighing sensor 275 detects the increase in material weight within the receiving container 270 in real time and sends the corresponding weighing data to the main control board 48 via the weighing module 45. The main control board 48 determines the current weight of the material falling into the receiving container 270 based on the weighing data.

[0139] S4. Stop material control and record clearing steps.

[0140] When the weight of the material represented by the weighing data reaches the preset metering threshold, the main control board 48 controls the corresponding drive motor 2009 to stop rotating through the motor drive board 43, completes the metering and discharge, and records the discharge weight.

[0141] When the receiving container 270 is removed and the corresponding limit switch a401 returns to the non-triggered state, the main control board 48 re-zeros the second weighing sensor 275 to restore the no-load reference of the weighing component 27; after the next receiving container 270 is placed in place, the zeroing calibration of step S1 is performed again to deduct the weight of the receiving container 270 itself and prepare for the next automatic metering discharge.

[0142] like Figure 17 As shown, based on the above-mentioned automatic metering and self-cleaning dispensing device for intelligent food preparation, the present invention also provides a self-cleaning control method, which includes the following steps.

[0143] Before performing step SS1 below, a safety preparation procedure must be performed. The operator places the wastewater tank 321 on the perforated plate 271, ensuring that the filter tube fixing seat 322 passes through the clearance hole of the perforated plate 271 and is inserted into the fixing ring 279. The operator then uses the limit switch c403 to detect whether the wastewater tank 321 is in place. If the limit switch c403 does not detect that the wastewater tank 321 is in place, the main control board 48 will prevent the cleaning program from starting and will output a message indicating that the wastewater tank is not in place through the display and operation interface. If the limit switch c403 detects that the wastewater tank 321 is in place, the main control board 48 will allow the execution of step SS1.

[0144] SS1. Cleaning start-up and discharge port sealing steps.

[0145] After receiving the cleaning command, the main control board 48 directly sends a rotation control signal to the servo motor 332. The servo motor 332 drives the water-blocking plate 335 to swing to the blocking position through the crank 337, rocker arm 336, and rocker arm seat 334, so that the water-blocking plate 335 blocks the discharge ports of the six auger pipes at the same time. After the water-blocking plate 335 blocks the six discharge ports, the hopper 2001, flexible connecting pipe 2005, corresponding auger pipes, and water-blocking plate 335 together form a water storage and cleaning space.

[0146] SS2, Liquid Supply and Water Injection Procedure.

[0147] The main control board 48 controls the electromagnetic three-way valve 312 to select an external water supply pipeline or an external cleaning liquid source as the liquid supply source according to the cleaning program, and controls at least one electromagnetic valve a3171 to open through the relay module 44, so that the cleaning liquid enters the corresponding hopper 2001 and auger pipe through the corresponding water outlet pipe b3102 and liquid inlet 2002.

[0148] During the injection of cleaning fluid, the corresponding first weighing sensor 2006 detects the weight change of hopper 2001 in real time. The main control board 48 determines the weight of the cleaning fluid injected into hopper 2001 based on the weight difference before and after injection. When the weight of the cleaning fluid injected into the corresponding hopper 2001 reaches the preset injection threshold, the main control board 48 controls the corresponding solenoid valve a3171 to close via relay module 44. The six cleaning branches can be opened sequentially, or multiple cleaning branches can be opened simultaneously according to the fluid supply capacity.

[0149] SS3, Joint Cleaning Steps.

[0150] After the cleaning fluid is injected, the main control board 48 controls the drive motor 2009 corresponding to the auger tube to be cleaned to run through the motor drive board 43, so that the corresponding short auger 2102 or long auger 2202 rotates and agitates the cleaning fluid accumulated in the auger tube.

[0151] The main control board 48 controls the corresponding drive motor 2009 to alternately rotate in the forward and reverse directions, thereby driving the short auger 2102 or the long auger 2202 to rotate alternately in the forward and reverse directions. When the alternating operation time, the number of alternating operation times, or the number of alternating rotations of the auger reach the preset values, the main control board 48 controls the corresponding drive motor 2009 to stop operating.

[0152] SS4. Steps for unblocking and draining water.

[0153] After the preset cleaning conditions are met, the main control board 48 directly controls the servo motor 332 to rotate in the opposite direction. This causes the servo motor 332 to drive the water blocking plate 335 from the blocked position to the open position via the crank 337, rocker arm 336, and rocker arm seat 334, thus releasing the blockage on the six auger pipe outlets. The cleaning wastewater in the hopper 2001 and auger pipes is discharged into the wastewater tank 321 through the auger pipe outlet. After being filtered by the filter screen tube 323, the wastewater flows sequentially through the filter screen tube fixing seat 322, fixing ring 279, silicone tube b278, wastewater adapter block 276, wastewater connector a277, wastewater pipe 3106, and outlet connector b313 into the external wastewater pipeline.

[0154] In step SS4, after the cleaning wastewater in the auger pipe is discharged, the main control board 48 controls the solenoid valve b3172 to open via the relay module 44, allowing the cleaning fluid to enter the cleaning inlet hole of the receiving plate 272 through the water distributor 316, the solenoid valve b3172, and the outlet pipe a3101. The cleaning fluid flows over the inner bottom surface of the receiving plate 272 and rinses it, then flows to the drain hole under the guidance of the inclined inner bottom surface, and then sequentially enters the external wastewater pipe through the fixing ring 279, the silicone tube b278, the wastewater adapter block 276, the wastewater connector a277, the wastewater pipe 3106, and the outlet connector b313.

[0155] After the receiving plate 272 has been rinsed for a preset time, the main control board 48 controls the solenoid valve b3172 to close through the relay module 44, and controls the solenoid three-way valve 312 to return to the preset state, stops the water pump 314 from running, and closes the corresponding solenoid valve a3171 according to the cleaning program, thus completing one self-cleaning process.

[0156] During the self-cleaning process described above, each hopper 2001 can be cleaned sequentially, or multiple hoppers 2001 can be cleaned simultaneously depending on the cleaning fluid supply capacity and control requirements. The cleaning time, auger forward running time, auger reverse running time, cleaning fluid injection weight, and receiving plate 272 rinsing time can all be set according to the material type, material viscosity, and actual equipment operating conditions.

[0157] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0158] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic metering and self-cleaning dispensing device for intelligent food preparation, characterized in that, It includes a machine body (1), a material feeding mechanism (2), a cleaning mechanism (3), and a controller (4); The fuselage mechanism (1) includes a frame (14) and a housing assembly (13) fixedly connected to the frame (14). The material feeding mechanism (2) includes multiple material feeding and conveying components mounted on the frame (14). Each material feeding and conveying component includes a hopper (2001), a first weighing sensor (2006), a conveying pipe, a conveying component, and a drive motor (2009). The hopper (2001) is supported on the first weighing sensor (2006) by a weighing support structure. The outlet of the hopper (2001) is connected to the inlet of the conveying pipe. The conveying component is rotatably mounted inside the conveying pipe and is connected to the output shaft of the drive motor (2009). The rotation of the conveying component can introduce the material in the hopper (2001) into the conveying pipe through the inlet and discharge it from the outlet of the conveying pipe. The hopper (2001) is provided with a liquid inlet (2002) communicating with its interior. The material feeding mechanism (2) also includes a weighing component (27), which includes a receiving plate (272) and a second weighing sensor (275). The receiving plate (272) is located below the discharge port of the conveying pipe and is supported on the frame (14) by the second weighing sensor (275) for weighing the container (270) that receives the material discharged from the conveying pipe. The cleaning mechanism (3) includes a liquid supply component, a diversion component, a water blocking component (33), and a drain channel; the liquid outlet of the liquid supply component is connected to the liquid inlet of the diversion component, and the diversion component includes multiple liquid supply branches that are connected one-to-one with each of the liquid inlets (2002) for selectively supplying cleaning liquid to each of the hoppers (2001); the water blocking component (33) is movably disposed at the outlet of the conveying pipe and can switch between a closed state and an open state; the receiving plate (272) is provided with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole is connected to the diversion component, and the liquid outlet hole is connected to the drain channel; The controller (4) is electrically connected to the first weighing sensor (2006), the second weighing sensor (275), the drive motor (2009), the liquid supply component, the diversion component, and the water blocking component (33), respectively. The controller (4) is used to determine the amount of residual material in the corresponding hopper (2001) according to the weight information detected by the first weighing sensor (2006), control the start and stop of the drive motor (2009) of the target material conveying component according to the weight change of the container (270) and the material inside it detected by the second weighing sensor (275), and control the cleaning mechanism (3) and the drive motor (2009) to perform cleaning and liquid drainage actions.

2. The automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The plurality of said material feeding conveyor components include a short auger feeding assembly (21) and a long auger feeding assembly (22); The conveying pipe and conveying component of the short auger unloading assembly (21) are a short auger pipe (2101) and a short auger (2102), respectively. The conveying pipe and conveying component of the long auger unloading assembly (22) are a long auger pipe (2201) and a long auger (2202), respectively. The length of the short auger pipe (2101) is less than the length of the long auger pipe (2201), and the length of the short auger (2102) is less than the length of the long auger (2202). The axes of the short auger pipe (2101) and the long auger pipe (2201) are parallel to each other and located in the same horizontal plane. The discharge ports of each of the conveying pipes are flush with each other, and the end faces of each of the discharge ports are located in the same plane. The material feeding mechanism (2) also includes a first fixing plate (23), a second fixing plate (24), two first fixing blocks (25) and two second fixing blocks (26). The first fixing plate (23) and the second fixing plate (24) are both rectangular plate structures and are spaced apart along the axial direction of the conveying pipe. The first fixing plate (23) and the second fixing plate (24) are respectively provided with a plurality of circular mounting holes that correspond one-to-one. Each of the short auger tubes (2101) and each of the long auger tubes (2201) pass through the corresponding circular mounting holes on the first fixing plate (23) and the second fixing plate (24) in sequence, and are radially supported and radially limited by the first fixing plate (23) and the second fixing plate (24). The two ends of the first fixing plate (23) are respectively fixed to the frame (14) by two first fixing blocks (25), and the two ends of the second fixing plate (24) are respectively fixed to the frame (14) by two second fixing blocks (26); Each of the material feeding and conveying components further includes a clamp (2004), a flexible connecting pipe (2005), an end cap (2007), and a universal coupling (2008); the two ends of the flexible connecting pipe (2005) are respectively sleeved on the discharge port of the hopper (2001) and the inlet of the corresponding conveying pipe, and are respectively fixed by the clamp (2004); the end cap (2007) is fixedly connected to the end of the corresponding conveying pipe near its inlet; the end cap (2007) has a bearing hole in the center and is rotatably connected to the conveying component through the bearing, and the conveying component is connected to the output shaft of the drive motor (2009) through the universal coupling (2008).

3. The automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The enclosure assembly (13) includes a top plate (131), a front plate (132), two side plates a (133), a limit switch fixing plate (134), a bottom mounting plate (135), a side plate b (136), a rear plate (137), a side plate c (138), and a narrow plate (139). The top plate (131), the front plate (132), the two side plates a (133) and the rear plate (137) are respectively fixedly connected to the top, front, left and right sides and the rear side of the frame (14). The limit switch fixing plate (134) is located below the front plate (132). The bottom mounting plate (135) is installed inside the frame (14). The side plate b (136) and the side plate c (138) are respectively installed below the two side plates a (133). The narrow plate (139) is installed on the lower front side of the frame (14).

4. The automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The controller (4) includes a control box (41), a power module (42), a motor drive board (43), a relay module (44), a weighing module (45), a hinge b (46), a box door (47), a main control board (48), and a switch (49). The control box (41) is fixedly installed on the frame (14), and the power module (42), the motor drive board (43), the relay module (44), the weighing module (45) and the main control board (48) are all installed inside the control box (41); The power module (42) is connected to the power supply ports of the motor drive board (43), the relay module (44), the weighing module (45) and the main control board (48) respectively; the main control board (48) is electrically connected to the motor drive board (43), the relay module (44) and the weighing module (45) respectively. The weighing module (45) is electrically connected to each of the first weighing sensors (2006) and the second weighing sensors (275), the motor drive board (43) is electrically connected to each of the drive motors (2009), and the relay module (44) is electrically connected to the electrical control execution components of the liquid supply assembly and the diversion assembly. The main control board (48) is electrically connected to multiple limit switches a (401). Each of the multiple limit switches a (401) is set to correspond one-to-one with the discharge port of each of the multiple conveying pipes, and is used to detect whether the container (270) is placed at the receiving position of the corresponding conveying pipe. When the limit switch a (401) detects that the corresponding container is placed in place, the main control board (48) allows the drive motor (2009) corresponding to the container to start, and when the limit switch a (401) does not detect that the corresponding container is placed in place, it prohibits the corresponding drive motor (2009) from starting. The door (47) is hinged to the opening of the control box (41) by the hinge b (46). The display and operation interface of the main control board (48) is installed at the opening of the door (47) and exposed on the outer surface of the door (47). The switch (49) is installed on the side wall of the control box (41).

5. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The machine body mechanism (1) also includes a stirring mechanism (11) located above the material feeding mechanism (2). The stirring mechanism (11) includes an upper shell (114), a cover plate (112), multiple support seats (113) and multiple stirring components (111). The upper shell (114) has a box structure with an open top. The multiple stirring components (111) are arranged inside the upper shell (114) and correspond one-to-one with each of the hoppers (2001). Multiple support seats (113) are fixedly installed inside the upper housing (114), and the cover plate (112) is located at the upper opening of the upper housing (114) and is fixedly connected to the upper housing (114) through multiple support seats (113).

6. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 5, characterized in that, Each of the stirring components (111) includes a stirring motor (1111), a coupling (1112), a magnet (1113), and a stirring rod (1114). The stirring motor (1111) is fixedly installed inside the upper housing (114). One end of the coupling (1112) is fixedly connected to the output shaft of the stirring motor (1111), and the other end is provided with a mounting cavity. The magnet (1113) is fixedly installed inside the mounting cavity. One end of the stirring rod (1114) is detachably attracted to the mounting cavity through the magnet (1113), and the other end can extend downward into the corresponding hopper (2001). The side wall of the mounting cavity is provided with a transmission slot for transmission connection of the stirring rod (1114).

7. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 6, characterized in that, The fuselage mechanism (1) also includes at least two sets of flipping components (12), each set of flipping components (12) being located on the same side of the upper housing (114); Each set of the flipping assembly (12) includes a hinge a (121), a slider connecting block (122), a slider (123), and a guide rail (124). The guide rail (124) is fixedly installed on the frame (14) in the vertical direction. The slider (123) is slidably installed in the guide rail (124) and can move up and down along the guide rail (124). The slider connecting block (122) is fixedly connected to the upper end of the slider (123). One end of the hinge a (121) is fixedly connected to the side of the upper housing (114), and the other end is fixedly connected to the slider connecting block (122). The upper housing (114) can move up and down along the guide rail (124) with the slide bar connecting block (122) and the slide bar (123), and can be flipped relative to the slide bar connecting block (122) by the hinge a (121) so that the stirring rod (1114) extends into the corresponding hopper (2001) in the working state, and exits the corresponding hopper (2001) in the non-working state and flips to the avoidance position with the upper housing (114).

8. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 6, characterized in that, The housing assembly (13) includes a top plate (131) fixedly installed on the top of the frame (14), and the controller (4) includes a main control board (48) and a relay module (44). The main control board (48) is electrically connected to a limit switch b (402). The limit switch b (402) is fixedly installed in the opening of the top plate (131) and corresponds to the position of the upper shell (114) to detect whether the upper shell (114) is closed in place; the main control board (48) is electrically connected to the relay module (44), and the relay module (44) is electrically connected to each stirring motor (1111); when the limit switch b (402) detects that the upper shell (114) has left the closed position, the main control board (48) controls each stirring motor (1111) to stop rotating or prohibits each stirring motor (1111) from starting through the relay module (44), and when the limit switch b (402) detects that the upper shell (114) is closed in place, the relay module (44) is allowed to connect the power supply circuit of each stirring motor (1111).

9. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The weighing assembly (27) also includes a perforated plate (271), a pad (273), a weighing fixing block (274), a wastewater transfer block (276), a wastewater connector a (277), a flexible connecting pipe b (278), and a fixing ring (279). The weighing fixing block (274) is fixedly installed on the frame (14). One end of the second weighing sensor (275) is connected to the weighing fixing block (274) through a pad (273), and the other end is connected to the receiving plate (272) through another pad (273). The receiving plate (272) has a box-shaped structure with an open top. The perforated plate (271) is detachably connected to the upper opening of the receiving plate (272). The liquid inlet and the liquid outlet are respectively located at both ends of the receiving plate (272). The inner bottom surface of the receiving plate (272) is inclined towards the side of the liquid outlet. The fixed ring (279) is installed at the drain hole, the wastewater adapter block (276) is installed on the frame (14), the two ends of the flexible connecting pipe b (278) are respectively connected to the inlet of the fixed ring (279) and the wastewater adapter block (276), the wastewater connector a (277) is connected to the outlet of the wastewater adapter block (276), and the wastewater connector a (277) is connected to the drain channel.

10. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 9, characterized in that, The cleaning mechanism (3) also includes a water collection component (32) that is detachably disposed on the perforated plate (271). The water collection assembly (32) includes a wastewater tank (321), a filter screen tube fixing seat (322), and a filter screen tube (323). The wastewater tank (321) is located below the discharge ports of the multiple conveying pipes and is used to receive the cleaning wastewater discharged from the discharge ports of the multiple conveying pipes. The wastewater tank (321) is provided with a drain hole, and the filter screen tube (323) is installed at the drain hole of the wastewater tank (321). The filter screen tube (323) has multiple filter holes on its tube wall. The filter screen tube fixing seat (322) is connected to the drain hole of the wastewater tank (321) and is detachably inserted into the fixing ring (279) so that the cleaning wastewater in the wastewater tank (321) enters the drainage channel in sequence through the filter screen tube (323), the filter screen tube fixing seat (322), the fixing ring (279), the flexible connecting pipe b (278), the wastewater transfer block (276) and the wastewater connector a (277).

11. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 10, characterized in that, The controller (4) includes a main control board (48) and a limit switch c (403) electrically connected to the main control board (48). The limit switch c (403) is fixedly installed on the frame (14) and corresponds to the wastewater tank (321) to detect whether the wastewater tank (321) is placed in place; The main control board (48) prohibits the cleaning mechanism (3) from starting when the limit switch c (403) does not detect that the wastewater tank (321) is in place, and allows the cleaning mechanism (3) to start when the limit switch c (403) detects that the wastewater tank (321) is in place.

12. The automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The liquid supply assembly includes a water inlet connector b (311), a solenoid three-way valve (312), a water pump (314), and a water inlet connector c (318). The water inlet connector b (311) is used to connect with the external water supply pipeline, the water inlet connector c (318) is used to connect with the external cleaning liquid source, and the water inlet of the water pump (314) is connected with the water inlet connector c (318). The two inlet ends of the electromagnetic three-way valve (312) are respectively connected to the water inlet connector b (311) and the outlet of the water pump (314). The outlet end of the electromagnetic three-way valve (312) constitutes the outlet end of the liquid supply assembly, which is used to selectively output water from the external water supply pipeline or cleaning liquid from the external cleaning liquid source.

13. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 12, characterized in that, The diversion assembly includes a main inlet pipe (3107), a diverter (316), multiple solenoid valves a (3171) and solenoid valve b (3172). One end of the main water inlet pipe (3107) is connected to the liquid outlet of the electromagnetic three-way valve (312), and the other end is connected to the water inlet of the water distributor (316). The water distributor (316) includes multiple first water outlets and one second water outlet. The multiple first water outlets are respectively connected to the multiple liquid inlets (2002) through multiple solenoid valves a (3171) to form multiple liquid supply branches. The second water outlet is connected to the liquid inlet of the receiving plate (272) through the solenoid valve b (3172).

14. An automatic metering and self-cleaning discharging device for intelligent food preparation according to claim 1, characterized in that, The water-blocking assembly (33) includes a servo motor mounting base (331), a servo motor (332), two water-blocking plate mounting bases (333), a rocker arm mount (334), a water-blocking plate (335), a rocker arm (336), and a crank (337). The servo motor (332) is mounted on the frame (14) via the servo motor mounting base (331), and the two water-blocking plate mounting bases (333) are mounted on the frame (14) at intervals. The two ends of the water-blocking plate (335) are rotatably connected to the two water-blocking plate mounting bases (333) respectively. One end of the crank (337) is fixedly connected to the output shaft of the servo motor (332), and the other end is rotatably connected to one end of the rocker arm (336); the other end of the rocker arm (336) is rotatably connected to the water-blocking plate (335) through the rocker arm seat (334); The controller (4) includes a main control board (48), which is electrically connected to the servo motor (332) and is used to directly control the rotation of the servo motor (332). The servo motor (332) is used to drive the water blocking plate (335) to swing between the closed state and the open state through the crank (337) and the rocker arm (336). When the water blocking plate (335) is in the closed state, the water blocking plate (335) simultaneously abuts against and blocks the outlet of each of the conveying pipes. When the water blocking plate (335) is in the open state, the water blocking plate (335) separates from the outlet of each of the conveying pipes.

15. An automatic material feeding and metering control method, applied to the automatic metering and self-cleaning discharging device for intelligent food preparation as described in claim 1, characterized in that, include: S1. After the container is placed on the receiving plate (272), the second weighing sensor (275) is zeroed through the controller (4); S2. After receiving the discharge command, control the start of the drive motor (2009) corresponding to the target conveying pipe, so that the drive motor (2009) drives the corresponding conveying component to rotate, so as to discharge the material in the corresponding hopper (2001) into the container through the target conveying pipe; S3. The weight of the material discharged into the container (270) by the target conveying pipe is detected in real time by the second weighing sensor (275), and the corresponding weighing data information is sent to the controller (4). S4. When the weight of the material represented by the weighing data information reaches the preset measurement threshold, control the corresponding drive motor (2009) to stop rotating.

16. The automatic material feeding and metering control method according to claim 15, characterized in that, The automatic metering and self-cleaning discharging device for intelligent catering preparation also includes multiple limit switches a (401) that are respectively set one-to-one with the discharge ports of the multiple conveying pipes, and the multiple limit switches a (401) are respectively electrically connected to the controller (4). Before performing step S2, the method further includes: The first weighing sensor (2006) detects the weight of the remaining material in the corresponding hopper (2001), and outputs a replenishment prompt when the weight of the remaining material is lower than a preset low threshold. Upon receiving the pre-filling instruction, at least one of the drive motors (2009) is controlled to run for a preset running time or a preset number of rotations, so that the corresponding conveying pipe is pre-filled with material; the limit switch a (401) corresponding to the discharge port of the target conveying pipe is used to detect whether the container is placed in place, and the discharge instruction is allowed to be generated after the container is detected to be placed in place, and the corresponding drive motor (2009) is prohibited from starting when the container is not detected to be placed in place; After the corresponding drive motor (2009) stops rotating, the current output weight is recorded, and after the container is detected to have moved away, the second weighing sensor (275) is reset to zero again.

17. A self-cleaning control method, applied to the automatic metering and self-cleaning discharging device for intelligent food preparation as described in claim 10, characterized in that, include: SS1. After receiving the cleaning command, control the water blocking component (33) to switch from the open state to the closed state to block the discharge port of each of the conveying pipes; SS2. Control the liquid supply component to select the liquid supply source, and control the diversion component to open at least one of the liquid supply branches, and inject cleaning liquid into the corresponding hopper (2001) and conveying pipe through the liquid inlet (2002) corresponding to the opened liquid supply branch; SS3, the drive motor (2009) corresponding to the liquid supply branch controlled and turned on operates to drive the corresponding conveying component to rotate and agitate the cleaning liquid in the conveying pipe; SS4. After the preset cleaning conditions are met, control the water blocking component (33) to switch from the closed state to the open state, so that the cleaning wastewater is discharged from the outlet of the conveying pipe into the wastewater tank (321) and discharged through the drainage channel.

18. The self-cleaning control method according to claim 17, characterized in that, The automatic metering and self-cleaning discharge device for intelligent food preparation also includes a limit switch c (403) installed at the wastewater tank (321) and electrically connected to the controller (4). Before performing step SS1, the limit switch c (403) is used to check whether the wastewater tank (321) is in place; When the limit switch c (403) detects that the wastewater tank (321) is in place, step SS1 is allowed to be executed; when the limit switch c (403) does not detect that the wastewater tank (321) is in place, cleaning is prohibited and a wastewater tank not in place prompt is output.

19. A self-cleaning control method according to claim 17, characterized in that, In step SS2, the liquid supply branch corresponding to the hopper (2001) to be cleaned is turned on sequentially or simultaneously, and the weight of the cleaning liquid injected into the hopper (2001) is detected by the corresponding first weighing sensor (2006). When the weight of the cleaning fluid injected into the corresponding hopper (2001) reaches the preset injection threshold, the liquid supply branch corresponding to the hopper (2001) is closed.

20. A self-cleaning control method according to claim 17, characterized in that, In step SS3, the drive motor (2009) corresponding to the conveying pipe to be cleaned is controlled to alternately rotate in the forward and reverse directions to drive the corresponding conveying component to rotate alternately in the forward and reverse directions; When the forward and reverse alternating running time, the number of forward and reverse alternating runs of the drive motor (2009) or the number of forward and reverse alternating rotations of the conveying component reach a preset value, the corresponding drive motor (2009) is controlled to stop running.

21. The self-cleaning control method according to claim 17, characterized in that, In step SS4, after the cleaning wastewater in the delivery pipe is discharged, the diversion assembly is controlled to deliver cleaning fluid to the inlet hole of the receiving plate (272); The cleaning fluid entering the inlet hole flows through the inner bottom surface of the receiving plate (272) to rinse the inner bottom surface of the receiving plate (272), and is discharged from the drain hole through the fixing ring (279), the flexible connecting pipe b (278), the wastewater transfer block (276), the wastewater connector a (277) and the drain channel in sequence.

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