A large layer fuzzy PID temperature controller

Abstract

The utility model relates to brewing equipment technical field, concretely relates to a big koji layered fuzzy PID temperature controller, relates to the liquor brewing technical field. The temperature controller includes main control box, layered temperature measurement probe array and adjustable directional ventilation actuating mechanism. The main control box is divided into control cavity, power cavity and mixing cavity in the inside, is equipped with controller core board, circulating fan and electric heater respectively, and the air supplementing opening and air return opening with air valve. Layered temperature measurement probe array is constituted by rigid probe stem with multiple axial distribution temperature sensor, and signal is connected into control cavity through waterproof joint. Adjustable directional ventilation actuating mechanism connects branch air pipe and main air pipe through universal ball head, and branch air pipe tail end is equipped with multiple spray hole spherical shower head. The utility model discloses through layered temperature measurement probe real -time sensing the internal temperature of the koji piece, adopts layered fuzzy PID algorithm to carry out intelligent decision, utilizes adjustable directional ventilation mechanism to realize the fine regulation and control of temperature field, effectively promotes the koji fermentation quality and uniformity.

Description

Technical Field

[0001] This utility model relates to the field of brewing equipment technology, specifically to a layered fuzzy PID temperature controller for Daqu (a type of starter culture). Background Technology

[0002] The fermentation process of Daqu (a type of starter culture) is a crucial step in brewing high-quality baijiu. This process is a typical solid-state fermentation, and its core lies in the precise control of the internal temperature curves of the Daqu blocks and the surrounding environment. Traditional temperature control methods mainly rely on manual experience, adjusting by opening and closing doors and windows and turning the Daqu blocks, which suffers from problems such as high labor intensity, inaccurate temperature control, and poor consistency. While some automated temperature control equipment has emerged in existing technologies, they generally suffer from the following drawbacks:

[0003] Limited temperature measurement: Most measurements only measure ambient air temperature or surface temperature of the curved block, which cannot accurately reflect the core temperature at different depths inside the curved block, resulting in insufficient basis for control decisions.

[0004] Rigid control strategy: The traditional single PID controller is difficult to cope with the complex process of fermentation of koji, which has large inertia, large time delay and nonlinearity. The control effect is not ideal and overshoot or oscillation is easy to occur.

[0005] The control methods are crude: the actuators for ventilation, heating and other functions are simple and cannot achieve precise and directional control of the temperature, humidity and airflow fields in the fermentation room, which affects the uniformity and quality of the fermentation blocks.

[0006] Therefore, there is an urgent need for a new type of temperature control device that can deeply perceive the internal state of the curved block, possess intelligent control algorithms, and perform precise execution. Utility Model Content

[0007] This invention provides a layered fuzzy PID temperature controller for large-scale curing blocks. The temperature control system uses a layered temperature probe array to sense the core temperature inside the curing blocks in real time, makes intelligent decisions through a layered fuzzy PID control algorithm, and uses an adjustable directional ventilation actuator to finely and directionally regulate the temperature field inside the curing room.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a layered fuzzy PID temperature controller, comprising a main control box, a layered temperature probe array, an adjustable directional ventilation actuator, and connecting pipes; the main control box is internally divided into a control chamber, a power chamber, and a mixing chamber; a controller core board is installed in the control chamber; a circulating fan and an electric heater are installed in the power chamber; the mixing chamber is provided with a make-up air inlet and a return air inlet, and a damper is installed at the make-up air inlet; the layered temperature probe array includes a rigid probe rod and multiple temperature sensors distributed along the axial direction of the rigid probe rod; the signal lines of all temperature sensors are integrated into a single bus and connected to the control chamber via a waterproof connector; the adjustable directional ventilation actuator includes a main air duct, a branch air duct connected to the main air duct, and a spherical nozzle installed at the end of the branch air duct; the branch air duct is connected to the main air duct via a universal ball joint; multiple spray holes are opened on the spherical surface of the spherical nozzle; the air inlet of the circulating fan is connected to the mixing chamber, and the air outlet is connected to the main air duct via a duct.

[0009] Preferably, the controller core board integrates a processor for implementing a hierarchical fuzzy PID control algorithm.

[0010] Preferably, the number of temperature sensors is three, each used to measure the temperature at different depths inside the curved block.

[0011] Preferably, the universal ball joint is a metal universal ball joint, which allows the branch duct to be positioned at multiple angles in space.

[0012] Preferably, the spherical nozzle is a hollow sphere with nozzles on its surface facing different directions.

[0013] Preferably, the electric heater is a PTC ceramic heater.

[0014] Preferably, the air valve is a regulating air valve driven by a stepper motor and is connected to the outside of the flute room through a make-up air pipe.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. By employing a layered temperature probe array including rigid probes and multiple axially distributed temperature sensors, this invention can directly and in real-time measure the temperature at different depths (such as the surface, middle, and core layers) inside the curved block, obtaining complete longitudinal temperature profile data. This overcomes the control signal distortion and lag problems caused by traditional technologies that only measure the ambient air or surface temperature of the curved block, providing a true and reliable basis for precise control.

[0017] 2. The core board of the controller of this utility model integrates a hierarchical fuzzy PID control algorithm. This algorithm combines the robustness of fuzzy control in handling nonlinear, large inertia, and large time delay problems with the high precision advantages of PID control, enabling it to make intelligent decisions by mimicking expert experience. It can adaptively adjust the control strategy according to the internal temperature gradient and changing trend of the block, effectively avoiding overshoot and oscillation phenomena that are prone to occur in traditional single PID controllers, and significantly improving the stability and adaptability of the control.

[0018] 3. An adjustable directional ventilation actuator, consisting of a universal ball joint connecting branch ducts and spherical nozzles with multi-directional spray holes, allows operators to precisely guide airflow to specific areas within the fermentation chamber that require control. This design achieves "directional air delivery," solving the problems of uneven temperature and airflow caused by traditional extensive ventilation. The spherical nozzles gently diffuse the airflow, preventing the surface of the fermented koji blocks from cracking due to direct airflow, thereby greatly improving the uniformity of fermentation and the quality of the finished product.

[0019] 4. This utility model integrates the power chamber, mixing chamber, and control chamber into a single unit. A stepper motor-driven air valve precisely adjusts the fresh air ratio. Combined with a PTC heater and a circulating fan, it achieves multi-parameter coordinated control of temperature, humidity, and airflow speed. This system has a compact structure and a high degree of automation, significantly reducing the labor intensity of workers and reliance on manual experience. Furthermore, through precise temperature control and energy saving, it ultimately ensures and improves the fermentation quality and production stability of the starter culture. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] In the diagram: 1. Compression chamber; 2. Main control box; 3. Control chamber; 4. Power chamber; 5. Mixing chamber; 6. Controller core board; 7. Circulating fan; 8. Electric heater; 9. Make-up air inlet; 10. Return air inlet; 11. Air valve; 12. Rigid probe; 13. Temperature sensor; 14. Waterproof connector; 15. Main air duct; 16. Branch air duct; 17. Spherical nozzle; 18. Universal ball head; 19. Spray hole; 20. Make-up air duct. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] according to Figure 1 As shown, a layered fuzzy PID temperature control system for large-scale curing is installed in the curing room 1. It mainly includes a main control box 2, a layered temperature probe array as an integral structural unit, a uniquely structured adjustable directional ventilation actuator, and pipes and cables connecting them.

[0025] The main control box 2 is the core of the entire system's control and power. Its interior is divided into three functionally independent chambers by partitions: a control chamber 3, a power chamber 4, and a mixing chamber 5. The control chamber 3 houses the controller core board 6. This core board integrates a high-performance processor, whose internal circuitry and firmware are specially configured to process multiple, layered temperature signals from the layered temperature probe array and output control commands to the actuators accordingly. The control chamber 3 should have good sealing properties to protect the internal electronic components from the high temperature and humidity environment of the chamber. The power chamber 4 houses a circulating fan 7 and an electric heater 8. The circulating fan 7 provides power for air circulation; the electric heater 8 is preferably a PTC ceramic heater, which is self-limiting, safe, and has a long lifespan, and is used to heat the circulating air. The mixing chamber 5 is an airflow mixing and regulation space, with a makeup air inlet 9 at the top and a return air inlet 10 on the side or bottom. An air valve 11 is installed at the air supply inlet 9. The air valve 11 is preferably an adjustable air valve driven by a stepper motor, which can precisely control the opening degree. The air valve 11 is connected to the outside of the flute 1 through the air supply pipe 20 to introduce fresh air from the outside.

[0026] The layered temperature probe array is a dedicated hardware structure designed for directly and synchronously acquiring the longitudinal temperature profile inside the curved block. The core of this array is a rigid probe 12 that can be inserted into the curved block, and multiple temperature sensors 13 fixedly installed at specific intervals along the axial direction of the rigid probe 12 in an inseparable manner. These three temperature sensors 13 spatially correspond to the surface, middle, and core layers of the curved block, respectively. Together with the rigid probe 12, they form an integrated sensing structure capable of reflecting the internal temperature gradient in real time. The signal lines of all temperature sensors 13 are integrated into a single bus and reliably connected to the control cavity 3 of the main control box 2 via a waterproof connector 14, ensuring stable signal transmission from this integrated structure.

[0027] The adjustable directional ventilation actuator is a non-standard ventilation structure designed for precise air delivery. The mechanism includes a main duct 15, multiple branch ducts 16 connected to the main duct 15, and spherical nozzles 17 installed at the end of each branch duct 16. The unique feature of this mechanism lies in its connection and outlet structure: the branch ducts 16 are connected to the main duct 15 via universal ball joints 18. These universal ball joints 18 are preferably metal, forming a flexible mechanical joint that allows each branch duct 16 to be independently positioned and locked at multiple angles within space, thus achieving free and precise adjustment of the air delivery direction. At the air outlet, the spherical nozzle 17 is a hollow sphere with multiple nozzle holes 19 on its surface, pointing in different directions and not along a single axis. This special geometry forces the airflow to change direction at the outlet, transforming it from a traditional concentrated direct current into a gentle airflow diffused in multiple directions, effectively avoiding direct blowing and achieving refined and uniform control of the temperature and airflow fields within the ventilation room.

[0028] When the system is in operation, the circulating fan 7 starts, and airflow is drawn in from the return air inlet 10 of the mixing chamber 5, mixing with fresh air introduced from the make-up air inlet 9 after being regulated by the air valve 11. The mixed airflow is heated by the electric heater 8 as it passes through the power chamber 4. Subsequently, driven by the circulating fan 7, the airflow enters the main air duct 15 through the air channel and is distributed to each branch air duct 16, finally being evenly and directionally delivered into the fermentation chamber 1 space through the nozzles 19 on the uniquely structured spherical nozzle 17. Simultaneously, a layered temperature probe array, as an integrated structure, monitors the temperature at different depths inside the fermentation blocks in real time and transmits the data to the controller core board 6. Based on the received multi-point temperature data, the controller core board 6 makes comprehensive judgments and responses, dynamically adjusting the speed of the circulating fan 7, the power of the electric heater 8, and the opening of the air valve 11, thereby achieving precise and stable control of the fermentation environment within the fermentation chamber 1.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A layered fuzzy PID temperature controller for large-scale bead production, characterized in that, Includes the main control box (2), a layered temperature probe array, an adjustable directional ventilation actuator, and connecting pipes; The main control box (2) is divided into a control chamber (3), a power chamber (4) and a mixing chamber (5); the control chamber (3) is equipped with a controller core board (6); the power chamber (4) is equipped with a circulating fan (7) and an electric heater (8); the mixing chamber (5) is equipped with an air supply port (9) and an air return port (10), and an air valve (11) is installed at the air supply port (9); The layered temperature probe array includes a rigid probe (12) and multiple temperature sensors (13) distributed along the axial direction of the rigid probe (12); the signal lines of all temperature sensors (13) are integrated into a single bus and connected to the control cavity (3) via a waterproof connector (14); The adjustable directional ventilation actuator includes a main air duct (15), a branch air duct (16) connected to the main air duct (15), and a spherical nozzle (17) installed at the end of the branch air duct (16); the branch air duct (16) is connected to the main air duct (15) through a universal ball joint (18); the spherical nozzle (17) has multiple spray holes (19) on its spherical surface. The air inlet of the circulating fan (7) is connected to the mixing chamber (5), and the air outlet is connected to the main air duct (15) through the air duct.

2. The large-scale layered fuzzy PID temperature controller according to claim 1, characterized in that: The controller core board (6) integrates a processor for implementing the hierarchical fuzzy PID control algorithm.

3. The large-scale layered fuzzy PID temperature controller according to claim 1, characterized in that: The number of temperature sensors (13) is three, which are used to measure the temperature at different depths inside the curved block.

4. The large-scale layered fuzzy PID temperature controller according to claim 1, characterized in that: The universal ball joint (18) is a metal universal ball joint, which allows the branch pipe (16) to be positioned at multiple angles in space.

5. A layered fuzzy PID temperature controller according to claim 1, characterized in that: The spherical nozzle (17) is a hollow sphere with nozzles (19) on its surface facing different directions.

6. The large-scale layered fuzzy PID temperature controller according to claim 1, characterized in that: The electric heater (8) is a PTC ceramic heater.

7. A layered fuzzy PID temperature controller according to claim 1, characterized in that: The air valve (11) is a regulating air valve driven by a stepper motor and is connected to the outside of the flute room (1) through the air supply pipe (20).

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