Rice mill and grain drying control method thereof

Abstract

The application relates to a rice mill and a grain drying control method thereof, and relates to the technical field of home appliances. The rice mill comprises a rice bin, a drying assembly and a stirring assembly. The grain drying control method comprises the following steps: acquiring the current moisture content of grains in the rice bin; if the current moisture content is not less than a preset starting moisture content threshold, acquiring the current filling rate of the grains in the rice bin; based on the grain filling rate, determining initial operation parameters of the drying assembly and the stirring assembly; wherein the initial operation parameters represent that the drying power and / or the drying air volume of the drying assembly are positively correlated with the grain filling rate, and the operation frequency and / or the stirring speed of the stirring assembly are positively correlated with the grain filling rate; starting the drying assembly and the stirring assembly, and respectively controlling the drying assembly and the stirring assembly to operate according to the initial operation parameters. The whole scheme can achieve a good grain drying effect.

Description

Technical Field

[0001] This application relates to the field of rice milling machine technology, and in particular to a rice milling machine and its grain drying control method, apparatus, computer equipment, storage medium and computer program product. Background Technology

[0002] Household rice milling machines typically have a separate rice hopper to hold and store the paddy rice to be processed. In practical use, the moisture content of the paddy rice directly determines the quality of the milled rice, especially the thoroughness of hulling and the integrity of the finished rice (i.e., the head rice percentage). However, existing equipment often lacks the ability to monitor and actively control the moisture content of the paddy rice in real time, making it difficult to solve two common moisture problems:

[0003] First, for rice stored in a silo for a long time, the moisture content can easily increase due to changes in household humidity or prolonged storage. If the rice is milled directly, quality problems such as incomplete hulling and increased broken rice may occur.

[0004] Secondly, for newly harvested rice that is being put into the rice silo for processing, the rice may have already carried high moisture content due to environmental factors during transportation and temporary storage, whether purchased from supermarkets or harvested from the field. If this high-moisture rice is put directly into the rice silo without verification, it will quickly increase the overall moisture content, resulting in poor milling performance and reduced integrity of the finished product.

[0005] However, most existing household rice milling machines only have basic rice milling functions and cannot distinguish between existing and newly added paddy rice, nor do they have targeted drying control methods. This makes it difficult to ensure that the paddy rice entering the processing chamber is in the optimal dry state for hulling, whether the existing paddy rice is damp or the newly added paddy rice is moist. Therefore, there is an urgent need for a grain drying control method that can achieve good grain drying results to improve the quality of milled rice. Summary of the Invention

[0006] Therefore, it is necessary to provide a rice milling machine that can achieve good grain drying effect, as well as its grain drying control method, device, computer equipment, computer-readable storage medium and computer program product, in response to the above-mentioned technical problems.

[0007] In a first aspect, this application provides a method for controlling grain drying in a rice milling machine, wherein the rice milling machine is equipped with a drying component and a stirring component; the method includes:

[0008] Obtain the current moisture content of the grain in the rice silo;

[0009] If the current moisture content is not less than the preset start-up moisture content threshold, then obtain the current filling rate of the grain in the silo.

[0010] Based on the current grain filling rate, the initial operating parameters of the drying component and the stirring component are determined; wherein, the initial operating parameters characterize that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate.

[0011] Start the drying and stirring components, and control their operation according to the initial operating parameters.

[0012] In one embodiment, obtaining the current moisture content of the grain in the silo includes at least one of the following methods:

[0013] The initial moisture content of the rice is obtained by using a first moisture content sensor installed at the feed inlet at the top of the rice silo.

[0014] The static average moisture content of the grain under storage conditions is obtained by using a second moisture content sensor installed in the discharge channel at the bottom of the rice silo.

[0015] In one embodiment, determining the initial operating parameters of the mixing assembly based on the current grain filling rate includes:

[0016] Obtain a preset first fill rate threshold and a second fill rate threshold, wherein the first fill rate threshold is greater than the second fill rate threshold;

[0017] When the current grain filling rate is greater than or equal to the first filling rate threshold, the initial operating parameters are determined to be the first mode; the first mode is used to characterize the operating intensity of the stirring component as high, or the operating frequency as the first frequency;

[0018] When the current grain filling rate is less than the first filling rate threshold and not less than the second filling rate threshold, the initial operating parameters are determined to be the second mode; the second mode is used to characterize the operating intensity of the stirring component as medium, or the operating frequency as the second frequency;

[0019] When the current grain filling rate is less than the second filling rate threshold, the initial operating parameters are determined to be the third mode; the third mode is used to characterize the operating intensity of the stirring component as low, or the operating frequency as the third frequency;

[0020] The first frequency, the second frequency, and the third frequency decrease sequentially.

[0021] In one embodiment, determining the initial operating parameters of the drying assembly based on the current grain filling rate includes:

[0022] Obtain the preset third fill rate threshold and fourth fill rate threshold, where the third fill rate threshold is greater than the fourth fill rate threshold;

[0023] When the current grain filling rate is greater than or equal to the third filling rate threshold, the initial operating state of the drying component is determined to be the first power level.

[0024] When the current grain filling rate is less than the third filling rate threshold and not less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be the second power level.

[0025] When the current grain filling rate is less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be the third power level.

[0026] The drying power of the first power level, the second power level, and the third power level decreases sequentially.

[0027] In one embodiment, the operating mode characterized by the initial operating parameters includes an intermittent operating mode or a variable speed operating mode;

[0028] In intermittent operation mode, the drying component and / or stirring component alternately start and stop at a preset cycle, and the duty cycle reference value of the preset cycle is positively correlated with the grain filling rate; in variable speed operation mode, the stirring component switches between different stirring speed levels, and the reference stirring speed corresponding to different stirring speed levels is positively correlated with the grain filling rate; and in variable speed operation mode, the drying component switches between different power levels, and the reference operating power corresponding to different power levels is positively correlated with the grain filling rate.

[0029] In one embodiment, after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to the initial operating parameters, the method further includes:

[0030] Periodically monitor the real-time moisture content of the grain discharged from the bottom outlet of the rice silo;

[0031] If the real-time moisture content at the discharge port is less than or equal to the preset target moisture content threshold, then the drying component and the stirring component will be turned off.

[0032] If the real-time moisture content at the discharge port is greater than the preset target moisture content threshold, the current drying state will be maintained, and the real-time moisture content at the discharge port will continue to be periodically monitored. The preset target moisture content threshold will be less than the preset start-up moisture content threshold.

[0033] In one embodiment, the drying assembly includes a hot air generating unit; after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to initial operating parameters, the assembly further includes:

[0034] The output power of the hot air generating unit is adjusted according to the real-time moisture content of the grain at the discharge port in the rice silo.

[0035] In one embodiment, adjusting the output power of the hot air generating unit based on the real-time moisture content of the grain at the discharge port in the rice silo includes:

[0036] When the real-time moisture content at the discharge port is greater than the preset first moisture content threshold, the hot air generating unit is controlled to operate at the first power level.

[0037] When the real-time moisture content at the discharge port is not greater than the preset first moisture content threshold and is greater than the preset second moisture content threshold, the hot air generating unit is controlled to operate at the second power level.

[0038] When the real-time moisture content at the discharge port is not greater than the preset second moisture content threshold, the hot air generating unit is controlled to operate at the third power level; the total operating power corresponding to the first power level, the second power level, and the third power level decreases in sequence; the preset first moisture content threshold is greater than the preset second moisture content threshold; the preset second moisture content threshold is greater than the preset start-up moisture content threshold.

[0039] In one embodiment, the drying assembly includes a heating unit and an air supply unit; after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to the initial operating parameters, the assembly further includes:

[0040] The operating status of the heating unit and the air supply unit are adjusted according to the real-time moisture content of the grain at the discharge port in the rice silo.

[0041] In one embodiment, adjusting the operating status of the heating unit and the air supply unit based on the real-time moisture content of the grain outlet in the rice silo after the drying and stirring components are started includes:

[0042] When the real-time moisture content at the discharge port is greater than the preset third moisture content threshold, the heating unit is controlled to operate at the first heating power, and the air supply unit is controlled to operate at the first air volume.

[0043] When the real-time moisture content at the discharge port is not greater than the preset third moisture content threshold and is greater than the preset fourth moisture content threshold, the heating unit is controlled to operate at the second heating power and the air supply unit is controlled to operate at the second air volume.

[0044] When the real-time moisture content at the discharge port is not greater than the preset fourth moisture content threshold, the heating unit is controlled to operate at the third heating power, and the air supply unit is controlled to operate at the third air volume; wherein, the first heating power, the second heating power, and the third heating power decrease sequentially; the first air volume, the second air volume, and the third air volume decrease sequentially; and the preset fourth moisture content threshold is greater than the preset start-up moisture content threshold.

[0045] Secondly, this application also provides a grain drying control device for a rice milling machine. The rice milling machine is equipped with a drying assembly that utilizes air to dry the grains in a rice silo; the grain drying control device for the rice milling machine includes:

[0046] The moisture content detection module is used to obtain the current moisture content of the grains in the rice silo.

[0047] The filling rate analysis module is used to obtain the current filling rate of the grain in the silo if the current moisture content is not less than the preset start-up moisture content threshold.

[0048] The operation analysis module is used to determine the initial operating parameters of the drying component and the mixing component based on the current grain filling rate. The initial operating parameters indicate that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or mixing speed of the mixing component are positively correlated with the current grain filling rate.

[0049] The operation control module is used to start the drying and stirring components and control their operation according to the initial operating parameters.

[0050] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0051] Obtain the current moisture content of the grain in the rice silo;

[0052] If the current moisture content is not less than the preset start-up moisture content threshold, then obtain the current filling rate of the grain in the silo.

[0053] Based on the current grain filling rate, the initial operating parameters of the drying component and the stirring component are determined; wherein, the initial operating parameters characterize that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate.

[0054] Start the drying and stirring components, and control their operation according to the initial operating parameters.

[0055] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0056] Obtain the current moisture content of the grain in the rice silo;

[0057] If the current moisture content is not less than the preset start-up moisture content threshold, then obtain the current filling rate of the grain in the silo.

[0058] Based on the current grain filling rate, the initial operating parameters of the drying component and the stirring component are determined; wherein, the initial operating parameters characterize that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate.

[0059] Start the drying and stirring components, and control their operation according to the initial operating parameters.

[0060] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0061] Obtain the current moisture content of the grain in the rice silo;

[0062] If the current moisture content is not less than the preset start-up moisture content threshold, then obtain the current filling rate of the grain in the silo.

[0063] Based on the current grain filling rate, the initial operating parameters of the drying component and the stirring component are determined; wherein, the initial operating parameters characterize that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate.

[0064] Start the drying and stirring components, and control their operation according to the initial operating parameters.

[0065] Sixthly, this application also provides a rice milling machine, including a rice bin, a drying component, a stirring component, and a controller; the drying component is used to dry the grains in the rice bin; the stirring component is used to stir the grains in the rice bin; and the controller is used to control the operation of the drying component and the stirring component using the above method.

[0066] The aforementioned rice milling machine and its grain drying control method, device, computer equipment, storage medium, and computer program products first obtain the current moisture content of the grains in the rice bin, and only trigger subsequent drying actions when the moisture content is not less than a preset start-up moisture content threshold, thereby specifically drying the damp grains; after triggering drying, the current filling rate of the grains in the rice bin is further obtained, and the initial operating parameters of the drying component and the stirring component are determined based on the filling rate, and the drying power and / or drying air volume of the drying component, and the operating frequency and / or stirring speed of the stirring component are all positively correlated with the grain filling rate; the higher the filling rate, the deeper and denser the paddy accumulation, and the greater the resistance to hot air penetration. At this time, increasing the drying power and / or air volume can provide stronger penetration ability for the hot air, ensuring that the airflow effectively penetrates the deep grain layer; at the same time, increasing the stirring frequency and / or speed makes the deep paddy more frequently and quickly turned to the surface to contact the hot air, continuously breaking the bottom compaction zone and flow dead corners. Therefore, the drying output and stirring intensity are dynamically adapted to the actual grain loading, and the hot air acts on the entire grain layer, making moisture evaporation more efficient and ultimately achieving a good grain drying effect. Attached Figure Description

[0067] Figure 1 This is an application environment diagram of a grain drying control method in a rice milling machine in one embodiment;

[0068] Figure 2 This is a schematic flowchart of a grain drying control method in a rice milling machine in one embodiment;

[0069] Figure 3 This is a flowchart illustrating a grain drying control method in a rice milling machine in another embodiment;

[0070] Figure 4 This is a structural block diagram of a grain drying control device in a rice milling machine in one embodiment;

[0071] Figure 5 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0073] The grain drying control method in the rice milling machine provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, the entire rice milling machine includes a rice bin 110, a drying component 120, a stirring component 130, and a controller 140. The drying component 120 forms a drying air duct in the rice bin 110, which can use hot air to dry the grains in the rice bin 110. The stirring component 130 is set in the rice bin 110, which stirs the grains in the rice bin 110 by rotation, etc., so that the hot air can penetrate and contact the grains at different positions evenly, promote the timely discharge of hot and humid air in the gaps between the grains, and make the heat transfer and moisture evaporation more uniform throughout the grain pile, effectively avoiding uneven drying caused by local overheating or insufficient turning. The controller 140 is used to control the operation of the drying component 120 and the stirring component 130, specifically including controlling the heating power and wind speed of the drying component 120; or, controlling the stirring cycle (stirring frequency) of the stirring component 130. Specifically, the controller 140 acquires the current moisture content of the grain in the silo; if the current moisture content is not less than the preset start-up moisture content threshold, it acquires the current filling rate of the grain in the silo; based on the grain filling rate, it determines the initial operating parameters of the drying component 120 and the stirring component 130; wherein, the initial operating parameters indicate that the drying power and / or drying air volume of the drying component 120 are positively correlated with the grain filling rate, and the operating frequency and / or stirring speed of the stirring component 130 are positively correlated with the grain filling rate; the controller starts the drying component 120 and the stirring component 130, and controls the operation of the drying component 120 and the stirring component 130 respectively according to the initial operating parameters.

[0074] In one embodiment, such as Figure 2 As shown, a method for controlling grain drying in a rice milling machine is provided, which is applied to... Figure 1 Taking controller 140 as an example, the explanation includes the following steps:

[0075] S200: Obtain the current moisture content of the grain in the silo.

[0076] The current moisture content is a core parameter characterizing the current dampness of the grains in the rice silo and is also the basis for determining whether the drying process needs to be started. The controller communicates with moisture content sensors pre-installed inside the rice milling machine to obtain real-time collected rice moisture content data. Specifically, the moisture content sensors can be placed inside the rice silo at locations directly in contact with the rice, such as the side walls, bottom, or near the grain outlet at the bottom of the silo. Multiple moisture content sensors can be installed, distributed across these locations within the silo. When the moisture content sensor is placed at the discharge channel at the bottom of the silo, it detects the current moisture content at that discharge channel. For grains stored for a long time, where the accumulation time is longer and ventilation conditions are relatively poor, this sensor can more sensitively reflect the overall dampness of the grains in the silo. Additionally, the moisture content sensor can also be placed at the rice silo inlet to detect the moisture content of newly added grains. The moisture content sensor continuously collects data at a preset sampling frequency and transmits it to the controller. The controller compares the received moisture content value with a preset start-up moisture content threshold to determine whether to execute subsequent steps. This preset start-up moisture content threshold can be pre-calibrated and stored in the controller based on factors such as rice variety and suitable moisture content range for rice milling. For example, it can be set to a value between 14% and 16%. When the moisture content of the rice is lower than this threshold, it indicates that the rice is in a suitable drying state for hulling and no drying process needs to be initiated.

[0077] S400: If the current moisture content is not less than the preset start-up moisture content threshold, then obtain the current filling rate of the grain in the silo.

[0078] When the current moisture content obtained in step S200 is greater than or equal to the preset starting moisture content threshold, it indicates that the rice in the silo is not dry enough due to moisture. If it directly enters the subsequent processing silo for milling, incomplete hulling will occur, so the drying process needs to be started. Before starting the drying process, the controller first obtains the current filling rate of the grain in the silo. This filling rate reflects the ratio of the actual load of grain in the silo to the rated capacity of the silo. There are several ways to obtain the grain filling rate: for example, multiple level sensors can be arranged at different heights on the inner wall of the silo to determine the filling rate by detecting the height of the rice pile; another implementation method is to set a weighing sensor at the bottom of the silo or on the supporting structure to calculate the filling rate by measuring the total weight of the rice and combining it with the silo volume and rice density; the controller can also accumulate and calculate the current filling rate of the remaining grain based on the user's historical feeding records and the consumption of rice in each milling cycle.

[0079] S600: Based on the current grain filling rate, determine the initial operating parameters of the drying component and the stirring component; wherein, the initial operating parameters indicate that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate.

[0080] After obtaining the current grain filling rate in the grain bin, the controller determines the initial operating parameters of the drying and stirring components based on this filling rate. The initial operating parameters refer to a set of preset operating parameters for the drying and stirring components. This set of parameters specifies at least the drying power and / or drying air volume of the drying components, and the operating frequency and / or stirring speed of the stirring components. The core characteristic of these initial operating parameters is that each of these parameters is positively correlated with the current grain filling rate; that is, the higher the grain filling rate, the greater the drying power and / or drying air volume, and the higher the operating frequency and / or stirring speed of the stirring components.

[0081] Specifically, the technical principle underlying the positive correlation is as follows: When the grain filling rate is high, the amount of rice loaded in the silo is large and the stacking depth is deep. The pressure on the bottom rice layer increases significantly, leading to a decrease in porosity and an increase in density. Consequently, the penetration resistance of hot air in the rice layer increases. At the same time, due to the heavy pressure from the upper layer and the interlocking of particles, the deeper rice layer is more likely to form local compaction zones or arch bridges, creating flow dead zones where hot air cannot effectively penetrate, resulting in uneven drying. To address this physical condition, on the one hand, the drying power and / or drying air volume of the drying components can be increased to provide stronger penetration kinetic energy for the hot air, enabling it to overcome the resistance of the high-density rice layer and effectively penetrate the entire rice layer to reach the bottom. On the other hand, the operating frequency and / or stirring speed of the stirring components can be increased. Through more frequent or faster tumbling actions, the bottom compaction zones and arch bridge structures are continuously broken up, turning the deeper rice layer to the upper layer for full contact with the hot air and eliminating drying dead zones. Conversely, when the grain filling rate is low, the rice loading is small and the stacking is shallow, and the grain layer as a whole remains loose, hot air can easily penetrate evenly. At this time, the drying power and / or air volume can be reduced accordingly, and the stirring frequency and / or speed can be reduced to reduce energy consumption and mechanical wear.

[0082] S800: Start the drying and stirring components, and control their operation according to the initial operating parameters.

[0083] After determining the initial operating parameters in step S600, the controller simultaneously starts the drying component and the stirring component, and controls the drying component and the stirring component respectively according to the operating parameters determined in the initial operating parameters to perform the drying process of the grain in the rice silo.

[0084] For the drying assembly, the controller controls the drying assembly to operate at the corresponding output based on the drying power and / or drying air volume determined in the initial operating parameters. In one embodiment, the drying assembly may include a heating unit and an air supply unit. When the initial operating parameters specify the drying power, the controller controls the heating unit to operate at the corresponding heating power, so that the airflow entering the rice bin reaches the required temperature; when the initial operating parameters specify the drying air volume, the controller controls the air supply unit to operate at the corresponding speed, adjusting the airflow rate entering the rice bin. In another embodiment, the drying assembly may also use a single hot air generating unit, and the controller can achieve comprehensive control of the drying power and air volume simultaneously by adjusting the power or speed of this unit. After the drying assembly is started, hot air is continuously introduced into the rice bin, passing laterally through the rice layer, contacting the rice and carrying away the moisture, and the air carrying moisture is discharged from the air outlet, forming a continuous drying process for the rice.

[0085] The grain drying control method in the above-mentioned rice milling machine first obtains the current moisture content of the grain in the rice bin, and triggers subsequent drying actions only when the moisture content is not less than the preset start-up moisture content threshold, thereby specifically drying the damp grain. After triggering drying, the current filling rate of the grain in the rice bin is further obtained, and the initial operating parameters of the drying component and the stirring component are determined based on the filling rate. In this strategy, the drying power and / or drying air volume of the drying component, and the operating frequency and / or stirring speed of the stirring component are all positively correlated with the grain filling rate. The higher the filling rate, the deeper and denser the paddy is, and the greater the resistance to hot air penetration. At this time, increasing the drying power and / or air volume can provide stronger penetration ability for the hot air, ensuring that the airflow effectively penetrates the deep grain layer. At the same time, increasing the stirring frequency and / or speed makes the deep paddy more frequently and quickly turned to the surface to contact the hot air, continuously breaking the bottom compaction zone and flow dead corners. Therefore, the drying output and stirring intensity are dynamically adapted to the actual grain loading, and the hot air acts on the entire grain layer, making moisture evaporation more efficient and ultimately achieving a good grain drying effect.

[0086] In one embodiment, obtaining the current moisture content of the grain in the silo includes at least one of the following methods:

[0087] Step 2-1: Obtain the initial moisture content of the rice by using the first moisture content sensor installed at the feed inlet at the top of the rice bin.

[0088] When a user adds new rice to the rice silo, the rice passes through the inlet before entering the silo. In this step, the controller communicates with a first moisture content sensor located at the inlet on the top of the silo to obtain the initial moisture content of the rice flowing through it. This first moisture content sensor detects the moisture content of the newly added rice at the moment of addition, reflecting the moisture content of the external grain source itself.

[0089] Step 2-2: Obtain the static average moisture content of the grain under storage conditions by using a second moisture content sensor installed in the discharge channel at the bottom of the rice silo.

[0090] For rice that has been stored in the silo for a period of time, its moisture content changes slowly and gradually, influenced by ambient humidity and storage duration. In this step, the controller communicates with a second moisture content sensor located at the discharge channel at the bottom of the silo to obtain the static average moisture content of the grain at that location. The discharge channel, located at the bottom of the silo, is the necessary path for the rice to move from the silo to the subsequent processing silo. The rice piled up here is usually the part that has been stored for the longest time in the silo and is most significantly affected by the pressure from above, so its moisture content can reliably represent the overall moisture level of the long-term stored grain in the silo.

[0091] It should be noted that the above two methods for obtaining moisture content can be used individually or in combination. In one embodiment, if new rice is detected being fed into the rice silo, the controller can obtain only the initial moisture content detected by the first moisture content sensor, that is, the controller only obtains the moisture content of the newly fed grain as the current moisture content. In another embodiment, the controller can simultaneously obtain the initial moisture content detected by the first moisture content sensor and the static moisture content detected by the second moisture content sensor. When the static moisture content is not less than a preset start-up moisture content threshold, the drying operation is started. In yet another embodiment, if the rice silo is in a long-term storage state and no new rice is fed in, the controller can obtain only the static average moisture content from the second moisture content sensor as the basis for judging the current moisture content.

[0092] In one embodiment, determining the initial operating parameters of the mixing assembly based on the grain filling rate includes:

[0093] Step 6-1: Obtain the preset first fill rate threshold and second fill rate threshold, where the first fill rate threshold is greater than the second fill rate threshold.

[0094] In this step, the controller acquires two pre-set grain filling rate thresholds: a first filling rate threshold and a second filling rate threshold, where the first filling rate threshold is greater than the second filling rate threshold. These two thresholds together divide the continuous range of grain filling rate into three intervals: a high filling rate interval (not less than the first threshold), a medium filling rate interval (less than the first threshold and not less than the second threshold), and a low filling rate interval (less than the second threshold). The specific values ​​of the thresholds can be determined through experimental calibration based on the structural dimensions of the rice silo, the stacking characteristics of the rice variety, and the actual requirements of the drying process, and are pre-stored in the controller's storage unit. Specifically, the first filling rate threshold can be set to approximately 90% (e.g., 90±5%), and the second filling rate threshold can be set to approximately 50% (e.g., 50±5%).

[0095] Step 6-2: When the grain filling rate is greater than or equal to the first filling rate threshold, the initial operating parameters are determined to be the first mode; the first mode is used to characterize the operating intensity of the stirring component as high, or the operating frequency as the first frequency.

[0096] When the grain filling rate obtained in step S400 is greater than or equal to the first filling rate threshold, it indicates that the rice loading in the silo has approached or reached a high-density state. In this state, the material layer is deeply accumulated, the pressure on the bottom rice layer increases significantly, the porosity of the grain layer decreases substantially, and the resistance to hot air penetration is high. Simultaneously, the deep rice layer is prone to forming localized compaction zones or arching phenomena, creating flow dead zones where hot air cannot effectively enter, significantly increasing the risk of uneven drying. To address this state, the controller determines the initial operating parameters to be in the first mode. This mode indicates that the stirring component should operate with a higher operating intensity or a more frequent operating frequency. High operating intensity means that the total amount of tumbling action applied to the rice by the stirring component per unit time is large, which can be achieved by increasing the stirring speed, increasing the operating frequency, or increasing the duty cycle of intermittent operation. The first operating frequency means that the stirring component initiates stirring actions more frequently per unit time, i.e., the interval between stirring actions is short and the tumbling is more frequent. For example, in intermittent operation mode, the running time is set to be longer and the idle time shorter to increase the operating frequency. By adopting the first mode, the stirring component turns over the grain layer in a high-intensity and high-density working state, which can frequently break the bottom compaction zone and arch bridge structure, causing the deep rice to be continuously turned to the upper layer to come into contact with the hot air, ensuring that the hot air can continuously penetrate and act evenly on the entire grain layer, effectively eliminating the drying dead corners.

[0097] Step 6-3: When the grain filling rate is less than the first filling rate threshold and not less than the second filling rate threshold, the initial operating parameters are determined to be the second mode; the second mode is used to characterize the operating intensity of the stirring component as medium, or the operating frequency as the second frequency.

[0098] When the grain filling rate is between the first and second filling rate thresholds, the rice in the silo is in a medium-load state. In this state, the material layer thickness is moderate, and although the rice pile has a certain degree of compaction, the overall porosity remains at a relatively good level. Hot air penetration is good, and it is not easy to form severe compaction dead zones, making it easier to ensure drying uniformity. For this typical operating state, the controller determines the initial operating parameters to be in the second mode. This mode indicates that the stirring component should operate at a moderate operating intensity or a moderate operating frequency. The second frequency is lower than the first frequency, meaning the time interval between two consecutive stirring actions of the stirring component is relatively long, and the intensity of the stirring actions is moderate. Using the second mode can ensure sufficient contact between hot air and rice to achieve uniform drying while reducing the operating energy consumption and mechanical wear of the stirring component, achieving a reasonable balance between drying effect and equipment wear. Specifically, the operating intensity and frequency corresponding to the second mode can be used as the baseline operating parameters for the stirring component, while the first and third modes are adjustments upwards and downwards from this baseline, respectively.

[0099] Step 6-4: When the grain filling rate is less than the second filling rate threshold, the initial operating parameters are determined to be the third mode; the third mode is used to characterize the operating intensity of the stirring component as low, or the operating frequency as the third frequency; wherein, the first frequency, the second frequency and the third frequency decrease sequentially.

[0100] When the grain filling rate is less than the second filling rate threshold, the rice loading in the silo is low, and the material layer is thin. At this point, gravity compaction is weak, the grain layer remains loose, and the gaps between grains are ample, allowing hot air to easily penetrate the entire material layer and evenly contact each layer of rice. Under this condition, even if the stirring components operate at a low intensity and sparse frequency, the hot air can still effectively remove moisture from the rice, achieving uniform drying. If stirring is continued at a higher intensity and frequency, it not only increases unnecessary energy consumption and mechanical wear but may also lead to increased collision and friction between rice grains due to excessive agitation, increasing the risk of broken rice. Therefore, the controller determines the initial operating parameters to be in the third mode, which indicates that the stirring components should operate at a low intensity or sparse frequency. The third frequency is lower than the second frequency, meaning the stirring components initiate the stirring action the fewest times per unit time, and the agitation is the sparsest. By adopting the third mode, the stirring action is minimized while meeting the requirement of uniform drying, reducing equipment operating noise and energy consumption, and protecting the integrity of the rice grains.

[0101] In one embodiment, determining the initial operating parameters of the drying assembly based on the current grain filling rate includes:

[0102] Step 6-5: Obtain the preset third fill rate threshold and fourth fill rate threshold, where the third fill rate threshold is greater than the fourth fill rate threshold.

[0103] The controller acquires pre-set third and fourth filling rate thresholds, where the value of the third filling rate threshold is greater than the value of the fourth filling rate threshold. These two thresholds together divide the continuous range of grain filling rate into three intervals: a high filling rate interval (not less than the third threshold), a medium filling rate interval (less than the third threshold and not less than the fourth threshold), and a low filling rate interval (less than the fourth threshold). The specific values ​​of the thresholds can be determined through experimental calibration based on the structural dimensions of the rice silo, the stacking characteristics of the rice variety, and the actual requirements of the drying process, and are pre-stored in the controller's storage unit. In a preferred embodiment, the third filling rate threshold is the same as the aforementioned first filling rate threshold, and can be set to approximately 90% (e.g., 90±5%); the fourth filling rate threshold is the same as the aforementioned second filling rate threshold, and can be set to approximately 50% (e.g., 50±5%).

[0104] Step 6-6: When the current grain filling rate is greater than or equal to the third filling rate threshold, determine the initial operating state of the drying component as the first power level.

[0105] When the current grain filling rate obtained in step S400 is greater than or equal to the third filling rate threshold, it indicates that the rice loading in the silo has approached or reached a high-density state. In this state, the material layer is deeply piled, the pressure on the bottom rice layer increases significantly, and the porosity of the grain layer decreases substantially. Hot air needs to overcome considerable resistance to penetrate the grain layer. Simultaneously, due to the dense packing of the deep rice, hot air has difficulty reaching it effectively, easily creating drying dead zones. To address this state, the controller determines the initial operating state of the drying component to be the first power level. The first power level is the highest drying power level among all power levels. At this level, the drying component outputs maximum power, generating hot air with higher temperature and / or larger air volume. This ensures the hot air has sufficient kinetic and thermal energy to powerfully penetrate the dense, deep grain layer, effectively transferring heat to the bottom rice layer while removing a large amount of moisture, ensuring rapid and uniform drying even under high filling rate conditions.

[0106] Steps 6-7: When the current grain filling rate is less than the third filling rate threshold and not less than the fourth filling rate threshold, determine the initial operating state of the drying component as the second power level.

[0107] When the current grain filling rate is between the third and fourth filling rate thresholds, the rice in the silo is in a medium-load state. In this state, the material layer thickness is moderate, and although the rice pile has a certain degree of compaction, the overall porosity remains at a relatively good level. Hot air penetration is good, and it is not easy to form severe compaction dead zones, making it easier to ensure drying uniformity. For this typical operating state, the controller determines the initial operating state of the drying component to be the second power level. The drying power corresponding to the second power level is lower than the first power level. At this level, the drying component outputs medium power, providing hot air with moderate temperature and airflow. This power level can ensure that the hot air effectively penetrates the grain layer, fully contacts the rice, and removes moisture, while also reducing drying energy consumption, achieving a reasonable balance between drying effect and energy consumption. The second power level can be used as the baseline operating parameter for the drying component; the first and third power levels are adjustments upwards and downwards from this baseline, respectively.

[0108] Steps 6-8: When the current grain filling rate is less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be the third power level; wherein, the drying power corresponding to the first power level, the second power level and the third power level decreases in sequence.

[0109] When the current grain filling rate is less than the fourth filling rate threshold, the rice loading in the silo is low, and the material layer is thin. At this point, gravity compaction is weak, the grain layer remains loose, and the gaps between grains are ample. Hot air can easily penetrate the entire material layer and evenly contact each layer of rice, making drying easier. Under this condition, if the drying unit still operates at a high power, it will not only waste energy but may also cause over-drying of the rice surface or even damage to its quality due to excessively high hot air temperature or airflow. Therefore, the controller determines the initial operating state of the drying unit to be the third power level. The drying power corresponding to the third power level is lower than that of the second power level; that is, the drying power corresponding to the first, second, and third power levels decreases sequentially. At this level, the drying unit outputs lower power, providing hot air with lower temperature and / or lower airflow, maximizing energy savings while meeting the requirement of uniform drying, and avoiding adverse effects on rice quality due to over-drying.

[0110] In one embodiment, the initial operating parameters characterize an operating mode including an intermittent operating mode or a variable speed operating mode; in the intermittent operating mode, the drying component and the stirring component alternately start and stop at a preset cycle, and the duty cycle reference value of the preset cycle is positively correlated with the grain filling rate; in the variable speed operating mode, the stirring component switches between different stirring speed levels, and the reference stirring speed corresponding to different stirring speed levels is positively correlated with the grain filling rate; and in the variable speed operating mode, the drying component switches between different power levels, and the reference operating power corresponding to different power levels is positively correlated with the grain filling rate.

[0111] In intermittent operation mode, the drying and / or stirring components do not operate continuously but alternately on and off according to a preset cycle. The core control parameter of this mode is the duty cycle baseline value, which refers to the ratio of the component's running time to the total duration of the intermittent cycle within a complete cycle. For example, in a cycle with a total intermittent cycle duration of 60 seconds, if the components run for 40 seconds and stop for 10 seconds, the duty cycle is 40 / 50 ≈ 80%. In this mode, the duty cycle of the intermittent operation of the drying and stirring components is positively correlated with the grain filling rate. The technical logic is as follows: when the grain filling rate is high, the rice in the silo is deeply piled and dense, increasing the resistance to hot air penetration, and deep rice is prone to forming compacted dead zones. At this time, the drying and stirring components need to operate for a longer proportion of the unit time, so that the hot air can continuously act and the stirring can frequently intervene, in order to effectively penetrate the rice layer and break up the compacted areas. Therefore, the duty cycle increases with the increase of the filling rate, that is, the running time is extended and the stopping time is shortened. Conversely, when the grain filling rate is low, the grain layer is loose and hot air can easily penetrate, which can reduce the duty cycle, shorten the running time, and extend the stop time, thereby reducing energy consumption and mechanical wear. Specifically, in intermittent operation mode, the stirring component can be controlled to alternate between rotation and stop periods, and the length of the rotation period is positively correlated with the grain filling rate; and / or, the drying component can be controlled to alternate between effective working periods and stop periods; wherein, the effective working period includes at least one of heating period, blowing period, or heating and blowing synchronous period; and the length of the effective working period is positively correlated with the grain filling rate.

[0112] In variable speed operation mode, the stirring and drying components do not operate continuously with a single fixed parameter. Instead, they switch between different speed settings based on the grain filling rate, with the operating parameters for each setting positively correlated with the grain filling rate. In variable speed mode, the controller controls the stirring component to switch between different stirring speed settings, and the stirring speed corresponding to each setting is positively correlated with the grain filling rate. Stirring speed refers to the rotational speed of the stirring component; the higher the speed, the more times the rice is turned over per unit time, and the greater the turning intensity. In variable speed operation mode, the controller also controls the drying component to switch between different power settings, and the operating power corresponding to each power setting is positively correlated with the grain filling rate. The operating power of the drying component determines its output drying capacity; higher power results in higher hot air temperature and / or greater air volume, and a stronger ability to remove moisture from the grain layer.

[0113] In one embodiment, such as Figure 3 As shown, after starting the drying and stirring components and controlling their operation according to the initial operating parameters, the process also includes:

[0114] S920: Periodically detects the real-time moisture content of the grain discharged from the bottom outlet of the rice silo.

[0115] During the continuous operation of the drying process, the controller periodically monitors the moisture content of the grain at the discharge port at the bottom of the silo to obtain the real-time moisture content. The discharge port, located at the bottom of the silo, is the essential passage for the rice to enter the subsequent processing chambers. The rice at this location typically has the longest accumulation time and is most significantly subjected to the pressure from above, making its moisture content a reliable indicator of the overall final dryness of the grain within the silo. Periodic monitoring means that the controller repeatedly acquires the moisture content data at the discharge port at preset time intervals, rather than making a judgment based on a single measurement. The time interval for periodic monitoring can be reasonably set according to the dehydration rate of the drying system, such as monitoring every 1 minute, 2 minutes, or other suitable durations, and the monitoring frequency can be dynamically adjusted based on the changing trend of the moisture content.

[0116] S940: If the real-time moisture content at the discharge port is less than or equal to the preset target moisture content threshold, then the drying component and the stirring component will be turned off.

[0117] The controller compares the real-time moisture content at the discharge port obtained in step S920 with a preset target moisture content threshold. It should be noted that the preset target moisture content threshold and the preset start-up moisture content threshold in step S400 are two parameters with different functions and values. The preset start-up moisture content threshold is the entry threshold for determining whether drying treatment needs to be initiated; when the rice moisture content reaches or exceeds this value, it indicates that dampness has affected the degree of hulling, and drying needs to be initiated. The preset target moisture content threshold, on the other hand, is the completion threshold for determining whether the drying treatment has reached the ideal target state, and its value is less than the preset start-up moisture content threshold. In one specific embodiment, the preset start-up moisture content threshold can be approximately 16% (e.g., 16 ± 0.5%); the preset target moisture content threshold can be approximately 14% (e.g., 14 ± 0.5%). While shutting down the drying and stirring components, the discharge port at the bottom of the rice silo can also be opened to allow the dried grain to enter the rice milling silo for milling.

[0118] S960: If the real-time moisture content at the discharge port is greater than the preset target moisture content threshold, the current drying state will be maintained, and the real-time moisture content will continue to be periodically monitored. The preset target moisture content threshold is less than the preset start-up moisture content threshold.

[0119] When the real-time moisture content at the discharge port exceeds the preset target moisture content threshold, it indicates that the rice has not yet reached the ideal processing state, and the drying process needs to continue. At this time, the controller does not shut down the drying and stirring components, but maintains the current drying state, that is, it keeps the drying and stirring components running according to the determined initial operating parameters, and returns to step S920 to check the real-time moisture content at the discharge port again at the next detection cycle. Through the "detection-comparison-maintain / stop drying" cycle mechanism, the controller continuously monitors the drying progress of the rice until the real-time moisture content at the discharge port meets the preset target moisture content threshold before performing the shutdown and discharge operations, ensuring that each batch of rice discharged from the rice bin is in the optimal pre-milling state.

[0120] In one embodiment, the drying assembly includes a hot air generating unit; after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to initial operating parameters, the assembly further includes:

[0121] The output power of the hot air generating unit is adjusted according to the real-time moisture content of the grain at the discharge port in the rice silo.

[0122] The hot air generating unit is the core functional module in the drying assembly used to generate and output hot air. Its output power directly determines the temperature and / or airflow of the hot air introduced into the rice bin, thus affecting the drying rate and effect of the rice. After the drying assembly and stirring assembly are started and their operation is controlled according to the initial operating parameters, the drying process enters the continuous operation stage. In this stage, with the continuous action of hot air and constant stirring, the moisture content of the grain in the rice bin will gradually decrease. If the hot air generating unit continues to operate at the initially set output power, it may lead to excessive hot air output in the later stage when the moisture content of the grain has already decreased, resulting in energy waste and even affecting the quality of the rice due to over-drying. Therefore, in this embodiment, after the drying assembly and stirring assembly are started, the output power of the hot air generating unit is further adjusted according to the real-time moisture content of the grain in the rice bin.

[0123] In one embodiment, adjusting the output power of the hot air generating unit based on the real-time moisture content of the grain at the discharge port in the rice silo includes:

[0124] Step 9-1: When the real-time moisture content at the discharge port is greater than the preset first moisture content threshold, control the hot air generating unit to operate at the first power level.

[0125] In the initial stage after the drying process starts, the controller continuously acquires the real-time moisture content of the grains at the discharge port in the rice bin and compares it with a preset first moisture content threshold. The preset first moisture content threshold is a relatively high moisture content value used to determine whether the grains are still severely damp. When the real-time moisture content is greater than the preset first moisture content threshold, it indicates that the rice has a high moisture content, and the moisture inside and on the surface of the grains has not been significantly removed. At this time, the hot air generating unit needs to provide maximum drying output to achieve rapid dehydration. Therefore, the controller controls the hot air generating unit to operate at the first power level. The first power level is the highest operating power among all power levels. At this level, the hot air generating unit operates at maximum heating power and / or maximum airflow, generating hot air with a high temperature and large flow rate to remove moisture from the rice at the fastest rate, shortening the total drying time. Specifically, the preset first moisture content threshold can be set to approximately 18% (e.g., 18 ± 0.5%).

[0126] Step 9-2: When the real-time moisture content at the discharge port is not greater than the preset first moisture content threshold and is greater than the preset second moisture content threshold, control the hot air generating unit to operate at the second power level.

[0127] As the drying process continues, the moisture content of the rice gradually decreases. When the real-time moisture content at the discharge port drops to no greater than the preset first moisture content threshold but still greater than the preset second moisture content threshold, it indicates that the rice has completed initial dehydration and the moisture content has fallen from its high level, but there is still a certain gap from the ideal drying target. At this point, the moisture in the rice has changed from being mainly free water to a state where bound water and some residual free water coexist. Excessive hot air output will not only waste energy but may also cause the surface of the rice to dry excessively while the internal moisture does not have time to migrate, resulting in uneven drying. Therefore, the controller switches the hot air generating unit from the first power level to the second power level. The operating power corresponding to the second power level is lower than that of the first power level. Under this level, the hot air generating unit outputs at a medium power, providing hot air with a moderate temperature and flow rate to continue removing residual moisture from the rice at a relatively gentle rate. This ensures drying efficiency while reducing energy consumption and allows sufficient time for the internal and external moisture of the rice to reach equilibrium. Specifically, the preset second moisture content threshold can be set to around 15% (e.g., 15 ± 0.2%).

[0128] Step 9-3: When the real-time moisture content at the discharge port is not greater than the preset second moisture content threshold, control the hot air generating unit to operate at the third power level; the operating power corresponding to the first power level, the second power level and the third power level decreases in sequence; the preset first moisture content threshold is greater than the preset second moisture content threshold; the preset second moisture content threshold is greater than the preset start-up moisture content threshold.

[0129] When the real-time moisture content at the discharge port further decreases to no more than the preset second moisture content threshold, it indicates that the moisture content of the paddy rice has approached or reached the target range suitable for milling, and the drying process enters the final stage. At this time, the moisture in the paddy rice has been basically removed, and it is only necessary to maintain a relatively mild drying environment to keep the moisture content stable below the target value, or to remove any remaining trace moisture. If it continues to operate at a high power output at this time, it will not only waste energy, but may also lead to a decline in paddy rice quality due to over-drying, such as causing cracked grains, broken rice, or affecting the taste. Therefore, the controller switches the hot air generating unit to the third power level. The operating power corresponding to the third power level is lower than that of the second power level, that is, the operating power corresponding to the first, second, and third power levels decreases sequentially, forming a stepped decreasing power output curve. Specifically, the third power level refers to the lowest operating state, and its specific form can be selected according to the characteristics of the grain as low-power hot air, blowing only, or heating only. The operating power here can specifically include two parts: heating power and air supply power, that is, the operating power is the sum of heating power and air supply power.

[0130] It should be noted that the preset second moisture content threshold is greater than the preset start-up moisture content threshold. The preset start-up moisture content threshold is the entry threshold for determining whether drying treatment needs to be initiated, while the preset second moisture content threshold is the segmented threshold for power level switching. The numerical relationship among the three is as follows: the preset first moisture content threshold is the largest, the preset second moisture content threshold is the second largest, and the preset start-up moisture content threshold is the smallest. For example, in one embodiment, the preset first moisture content threshold can be 18%, the preset second moisture content threshold can be 15%, and the preset start-up moisture content threshold can be 14%. This hierarchical setting creates a complete judgment chain for drying control: drying is initiated when the rice moisture content reaches 16%, high power is used until it drops below 18%, then medium power is switched, then low power or pure air mode is switched when it drops below 15%, and finally drying is completed when it drops below 14%.

[0131] In one embodiment, the drying assembly includes a heating unit and an air supply unit; after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to the initial operating parameters, the assembly further includes: adjusting the operating status of the heating unit and the air supply unit according to the real-time moisture content of the grain outlet in the rice bin.

[0132] The heating unit heats the airflow entering the rice bin, raising the temperature of the air blowing onto the rice to increase the rate of moisture evaporation. The air supply unit drives the airflow, delivering the heated air into the rice bin and guiding it through the rice grains to remove moisture that has escaped from the grains. The heating and air supply units respectively handle the "heating" and "air supply" functions in the hot air drying process, and both can be controlled independently, allowing for precise adjustment of the drying output characteristics. Here, the operating status of the heating and air supply units is adjusted according to the real-time moisture content of the grains in the rice bin.

[0133] In one embodiment, adjusting the operating status of the heating unit and the air supply unit according to the real-time moisture content of the grain at the discharge port in the rice silo includes:

[0134] Step 9-4: When the real-time moisture content at the discharge port is greater than the preset third moisture content threshold, control the heating unit to operate at the first heating power and control the air supply unit to operate at the first air volume.

[0135] In the initial stage after the drying process starts, the moisture content of the rice is at a high level, with a large amount of free water within the grains, resulting in a high demand for moisture evaporation. The controller acquires the real-time moisture content of the grains in the rice bin and compares it with a preset third moisture content threshold. When the real-time moisture content exceeds the preset third moisture content threshold, it indicates that the rice is severely damp and requires rapid removal of a large amount of moisture. At this time, the controller controls the heating unit to operate at the first heating power and simultaneously controls the air supply unit to operate at the first air volume. The first heating power is the highest heating power among all settings, and the first air volume is the largest air supply volume among all settings. The combination of high temperature and high air volume provides the strongest drying output, allowing hot air to penetrate the rice layer at a high temperature and with a large flow rate, quickly removing moisture from the surface of the rice, achieving rapid dehydration, and shortening the drying time. Specifically, the preset third moisture content threshold can be set to approximately 18% (e.g., 18 ± 0.5%).

[0136] Step 9-5: When the real-time moisture content at the discharge port is not greater than the preset third moisture content threshold and is greater than the preset fourth moisture content threshold, control the heating unit to operate at the second heating power and control the air supply unit to operate at the second air volume.

[0137] As the drying process continues, the moisture content of the rice gradually decreases. When the real-time moisture content drops to no greater than the preset third moisture content threshold but still greater than the preset fourth moisture content threshold, it indicates that most of the free water in the rice has been removed, and the moisture content has fallen from its high level, but the ideal degree of dryness has not yet been achieved. If high power and large air volume are continued at this point, the surface of the rice may become over-dried, resulting in a "dry outside, wet inside" phenomenon, while also wasting energy. To address this, the controller switches the heating unit to the second heating power and the air supply unit to the second air volume. The second heating power is lower than the first heating power, and the second air volume is lower than the first air volume, with the temperature and flow rate of the hot air decreasing accordingly. This combination allows time for the internal moisture of the rice to migrate to the surface and evaporate while maintaining continuous drying capacity, promoting uniform moisture release and avoiding quality deterioration caused by excessively rapid drying. In one embodiment, the preset fourth moisture content threshold can be set to approximately 15% (e.g., 15 ± 0.2%).

[0138] Step 9-6: When the real-time moisture content at the discharge port is not greater than the preset fourth moisture content threshold, control the heating unit to operate at the third heating power and control the air supply unit to operate at the third air volume; wherein, the first heating power, the second heating power and the third heating power decrease sequentially; the first air volume, the second air volume and the third air volume decrease sequentially; and the preset fourth moisture content threshold is greater than the preset start-up moisture content threshold.

[0139] When the real-time moisture content further decreases to no more than the preset fourth moisture content threshold, it indicates that the moisture content of the rice has approached or reached the target range suitable for milling, and the drying process enters the final stage. At this time, the moisture in the rice has been basically removed, and only the trace amounts of residual moisture need to be treated, or a mild drying environment needs to be maintained to ensure that the moisture content remains stable and meets the standard. At this time, the controller switches the heating unit to the third heating power and the air supply unit to the third air volume. The third heating power is the lowest power among all levels, and the third air volume is the minimum air volume among all levels. In one embodiment, the third heating power can even be zero, that is, only room temperature air is used for purging; the third air volume can also be set to the minimum level required to maintain air circulation. Thus, while ensuring the drying effect of the grain, energy is saved to the maximum extent, and over-drying that causes the rice to crack or break is prevented. Similarly, the third air volume can also be set to a parameter greater than or equal to zero. Preferably, in practical applications, the third heating power and the third air volume can be selected to meet the minimum level of heating and air supply effect.

[0140] In practical applications, the relevant parameters of rice milling before and after applying the grain drying control method of the rice milling machine of this application are shown in Table 1 below.

[0141] Table 1 is a comparison table of rice milling-related parameters before and after applying the grain drying control method in the rice milling machine of this application.

[0142]

[0143] Based on the experimental data recorded in Table 1 above, it can be seen that after applying the grain drying control method in the rice milling machine of this application, under the condition of high filling rate (90%), the stirring cycle is dynamically adjusted to 15-20 seconds, the total drying time is shortened to 40 minutes, the bottom moisture content error is significantly reduced from ±1.5% or ±0.5% under the fixed stirring method to ±0.2%, the energy consumption is controlled at 3.3 kWh, and the broken rice rate is reduced to 1.1%; under the condition of low filling rate (50%), the stirring cycle is dynamically adjusted to 45-60 seconds, the total drying time is 24 minutes, the bottom moisture content error is reduced from ±0.8% to ±0.3%, the energy consumption is only 1.5 kWh, and the broken rice rate is 0.8%. It can be seen that this method can adaptively match the stirring cycle according to the grain filling rate. When the filling rate is high, high-frequency stirring is used to ensure uniform drying and shorten the time, while low-frequency stirring is used to reduce energy consumption and broken rice, achieving a highly efficient drying effect with good uniformity, low energy consumption, and less broken rice.

[0144] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0145] Based on the same inventive concept, this application also provides a grain drying control device for rice milling machines to implement the above-mentioned grain drying control method in rice milling machines. The solution provided by this device is similar to the solution described in the above-described method. Therefore, the specific limitations of one or more embodiments of the grain drying control device in rice milling machines provided below can be found in the limitations of the grain drying control method in rice milling machines described above, and will not be repeated here.

[0146] In one embodiment, such as Figure 4 As shown, a grain drying control device for a rice milling machine is provided. The rice milling machine is equipped with a drying component for drying grains in a rice bin using air drying and a stirring component for stirring grains in a rice bin. The grain drying control device for the rice milling machine includes:

[0147] Moisture content detection module 200 is used to obtain the current moisture content of the grain in the rice silo;

[0148] The filling rate analysis module 400 is used to obtain the current filling rate of the grain in the silo if the current moisture content is not less than the preset start-up moisture content threshold.

[0149] The operation analysis module 600 is used to determine the initial operating parameters of the drying component and the stirring component based on the current grain filling rate; wherein, the initial operating parameters characterize that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate.

[0150] The operation control module 800 is used to start the drying component and the stirring component, and to control the operation of the drying component and the stirring component respectively according to the initial operating parameters.

[0151] In one embodiment, the moisture content detection module 200 is further configured to obtain the initial moisture content of the rice by means of a first moisture content sensor installed at the top inlet of the rice silo; and to obtain the static average moisture content of the grain under storage conditions by means of a second moisture content sensor installed at the bottom outlet channel of the rice silo.

[0152] In one embodiment, the operation analysis module 600 is further configured to obtain a preset first filling rate threshold and a second filling rate threshold, wherein the first filling rate threshold is greater than the second filling rate threshold; when the current grain filling rate is greater than or equal to the first filling rate threshold, the initial operation parameters are determined to be a first mode; the first mode is used to characterize the operation intensity of the stirring component as high, or the operation frequency as a first frequency; when the current grain filling rate is less than the first filling rate threshold and not less than the second filling rate threshold, the initial operation parameters are determined to be a second mode; the second mode is used to characterize the operation intensity of the stirring component as medium, or the operation frequency as a second frequency; when the current grain filling rate is less than the second filling rate threshold, the initial operation parameters are determined to be a third mode; the third mode is used to characterize the operation intensity of the stirring component as low, or the operation frequency as a third frequency; wherein the first frequency, the second frequency, and the third frequency decrease sequentially.

[0153] In one embodiment, the operation analysis module 600 is further configured to obtain a preset third filling rate threshold and a fourth filling rate threshold, wherein the third filling rate threshold is greater than the fourth filling rate threshold; when the current grain filling rate is greater than or equal to the third filling rate threshold, the initial operating state of the drying component is determined to be a first power level; when the current grain filling rate is less than the third filling rate threshold and not less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be a second power level; when the current grain filling rate is less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be a third power level; wherein the drying power corresponding to the first power level, the second power level, and the third power level decreases sequentially.

[0154] In one embodiment, the operating mode characterized by the initial operating parameters includes an intermittent operating mode or a variable speed operating mode; in the intermittent operating mode, the drying component and / or the stirring component alternately start and stop at a preset cycle, and the duty cycle reference value of the preset cycle is positively correlated with the grain filling rate; in the variable speed operating mode, the stirring component switches between different stirring speed levels, and the reference stirring speed corresponding to different stirring speed levels is positively correlated with the grain filling rate; and in the variable speed operating mode, the drying component switches between different power levels, and the reference operating power corresponding to different power levels is positively correlated with the grain filling rate.

[0155] In one embodiment, the operation control module 800 is also used to periodically detect the real-time moisture content of the grain discharged from the discharge port at the bottom of the rice bin; if the real-time moisture content of the discharge port is less than or equal to a preset target moisture content threshold, the drying component and the stirring component are turned off; if the real-time moisture content of the discharge port is greater than the preset target moisture content threshold, the current drying state is maintained, and the real-time moisture content of the discharge port is continued to be periodically detected, where the preset target moisture content threshold is less than the preset start-up moisture content threshold.

[0156] In one embodiment, the drying assembly includes a hot air generating unit; the operation control module 800 is also used to adjust the output power of the hot air generating unit according to the real-time moisture content of the grain at the discharge port in the rice bin.

[0157] In one embodiment, the operation control module 800 is further configured to control the hot air generating unit to operate at a first power level when the real-time moisture content at the discharge port is greater than a preset first moisture content threshold; control the hot air generating unit to operate at a second power level when the real-time moisture content at the discharge port is not greater than the preset first moisture content threshold but is greater than a preset second moisture content threshold; and control the hot air generating unit to operate at a third power level when the real-time moisture content at the discharge port is not greater than the preset second moisture content threshold. The total operating power corresponding to the first power level, the second power level, and the third power level decreases sequentially. The preset first moisture content threshold is greater than the preset second moisture content threshold. The preset second moisture content threshold is greater than the preset starting moisture content threshold.

[0158] In one embodiment, the drying assembly includes a heating unit and an air supply unit; the operation control module 800 is also used to adjust the operating status of the heating unit and the air supply unit respectively according to the real-time moisture content of the grain outlet in the rice bin.

[0159] In one embodiment, the operation control module 800 is further configured to: control the heating unit to operate at a first heating power and control the air supply unit to operate at a first air volume when the real-time moisture content at the discharge port is greater than a preset third moisture content threshold; control the heating unit to operate at a second heating power and control the air supply unit to operate at a second air volume when the real-time moisture content at the discharge port is not greater than the preset third moisture content threshold but is greater than a preset fourth moisture content threshold; and control the heating unit to operate at a third heating power and control the air supply unit to operate at a third air volume when the real-time moisture content at the discharge port is not greater than the preset fourth moisture content threshold; wherein the first heating power, the second heating power, and the third heating power decrease sequentially; the first air volume, the second air volume, and the third air volume decrease sequentially; and the preset fourth moisture content threshold is greater than a preset start-up moisture content threshold.

[0160] In addition, this application also provides a rice milling machine, including a rice bin, a drying component, a stirring component, and a controller; the drying component is used to dry the grains in the rice bin; the stirring component is used to stir the grains in the rice bin; and the controller is used to control the operation of the drying component and the stirring component using the above method.

[0161] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5 As shown, the computer device includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a grain drying control method in a rice milling machine. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0162] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0163] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-described rice milling machine grain drying control method.

[0164] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described rice milling machine grain drying control method.

[0165] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the above-described rice milling machine grain drying control method.

[0166] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0167] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0168] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for controlling grain drying in a rice milling machine, characterized in that, The rice milling machine is equipped with a drying component and a stirring component; the method includes: Obtain the current moisture content of the grain in the rice silo; If the current moisture content is not less than the preset starting moisture content threshold, then the current filling rate of the grain in the rice silo is obtained; Based on the current grain filling rate, the initial operating parameters of the drying component and the stirring component are determined; wherein, the initial operating parameters indicate that the drying power and / or drying air volume of the drying component are positively correlated with the current grain filling rate, and the operating frequency and / or stirring speed of the stirring component are positively correlated with the current grain filling rate; Start the drying component and the stirring component, and control the operation of the drying component and the stirring component according to the initial operating parameters.

2. The method according to claim 1, characterized in that, The method of obtaining the current moisture content of the grain in the rice silo includes at least one of the following: The initial moisture content of the rice is obtained by using a first moisture content sensor installed at the feed inlet at the top of the rice silo. The static average moisture content of the grain under storage conditions is obtained by using a second moisture content sensor installed in the discharge channel at the bottom of the rice silo.

3. The method according to claim 1, characterized in that, Based on the current grain filling rate, the initial operating parameters of the mixing assembly are determined as follows: Obtain a preset first fill rate threshold and a second fill rate threshold, wherein the first fill rate threshold is greater than the second fill rate threshold; When the current grain filling rate is greater than or equal to the first filling rate threshold, the initial operating parameters are determined to be in the first mode; the first mode is used to characterize the operating intensity of the stirring component as high, or the operating frequency as the first frequency; When the current grain filling rate is less than the first filling rate threshold and not less than the second filling rate threshold, the initial operating parameters are determined to be in the second mode; the second mode is used to characterize the operating intensity of the stirring component as medium, or the operating frequency as the second frequency; When the current grain filling rate is less than the second filling rate threshold, the initial operating parameters are determined to be in the third mode; the third mode is used to characterize the operating intensity of the stirring component as low, or the operating frequency as the third frequency. The first frequency, the second frequency, and the third frequency decrease sequentially.

4. The method according to claim 1, characterized in that, Based on the current grain filling rate, the initial operating parameters of the drying assembly are determined as follows: Obtain a preset third fill rate threshold and a fourth fill rate threshold, wherein the third fill rate threshold is greater than the fourth fill rate threshold; When the current grain filling rate is greater than or equal to the third filling rate threshold, the initial operating state of the drying component is determined to be the first power level; When the current grain filling rate is less than the third filling rate threshold and not less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be the second power level. When the current grain filling rate is less than the fourth filling rate threshold, the initial operating state of the drying component is determined to be the third power level; The drying power corresponding to the first power level, the second power level, and the third power level decreases sequentially.

5. The method according to claim 1, characterized in that, The operating modes characterized by the initial operating parameters include intermittent operating mode or variable speed operating mode; In the intermittent operation mode, the drying component and / or the stirring component alternately start and stop at a preset cycle, and the duty cycle reference value corresponding to the preset cycle is positively correlated with the current filling rate of the grain; In the variable speed operation mode, the stirring component switches between different stirring speed levels, and the reference stirring speed corresponding to each of the different stirring speed levels is positively correlated with the current grain filling rate; and in the variable speed operation mode, the drying component switches between different power levels, and the reference operating power corresponding to each of the different power levels is positively correlated with the current grain filling rate.

6. The method according to claim 1, characterized in that, After starting the drying component and the stirring component, and controlling the operation of the drying component and the stirring component according to the initial operating parameters, the method further includes: Periodically monitor the real-time moisture content of the grain discharged from the bottom outlet of the rice silo; If the real-time moisture content at the discharge port is less than or equal to the preset target moisture content threshold, then the drying component and the stirring component are turned off. If the real-time moisture content at the discharge port is greater than the preset target moisture content threshold, the current drying state is maintained, and the real-time moisture content at the discharge port is periodically monitored. The preset target moisture content threshold is less than the preset start-up moisture content threshold.

7. The method according to claim 1, characterized in that, The drying assembly includes a hot air generating unit; after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to the initial operating parameters, the method further includes: The output power of the hot air generating unit is adjusted according to the real-time moisture content of the grain at the discharge port in the rice silo.

8. The method according to claim 7, characterized in that, The step of adjusting the output power of the hot air generating unit according to the real-time moisture content of the grain in the rice silo includes: When the real-time moisture content at the discharge port is greater than the preset first moisture content threshold, the hot air generating unit is controlled to operate at the first power level. When the real-time moisture content at the discharge port is not greater than a preset first moisture content threshold and is greater than a preset second moisture content threshold, the hot air generating unit is controlled to operate at the second power level. When the real-time moisture content at the discharge port is not greater than the preset second moisture content threshold, the hot air generating unit is controlled to operate at the third power level; the operating power corresponding to the first power level, the second power level, and the third power level decreases sequentially; the preset first moisture content threshold is greater than the preset second moisture content threshold; the preset second moisture content threshold is greater than the preset start-up moisture content threshold.

9. The method according to claim 1, characterized in that, The drying assembly includes a heating unit and an air supply unit; after starting the drying assembly and the stirring assembly, and controlling the operation of the drying assembly and the stirring assembly according to the initial operating parameters, the process further includes: The operating status of the heating unit and the air supply unit are adjusted according to the real-time moisture content of the grain at the discharge port in the rice silo.

10. The method according to claim 9, characterized in that, The step of adjusting the operating status of the heating unit and the air supply unit according to the real-time moisture content of the grain at the discharge port in the rice silo includes: When the real-time moisture content at the discharge port is greater than the preset third moisture content threshold, the heating unit is controlled to operate at the first heating power, and the air supply unit is controlled to operate at the first air volume. When the real-time moisture content at the discharge port is not greater than the preset third moisture content threshold and is greater than the preset fourth moisture content threshold, the heating unit is controlled to operate at the second heating power, and the air supply unit is controlled to operate at the second air volume. When the real-time moisture content at the discharge port is not greater than the preset fourth moisture content threshold, the heating unit is controlled to operate at the third heating power, and the air supply unit is controlled to operate at the third air volume; wherein, the first heating power, the second heating power, and the third heating power decrease sequentially; the first air volume, the second air volume, and the third air volume decrease sequentially; and the preset fourth moisture content threshold is greater than the preset start-up moisture content threshold.

11. A rice milling machine, characterized in that, The device includes a rice silo, a drying assembly, a stirring assembly, and a controller; the drying assembly is used to dry the grain in the rice silo; the stirring assembly is used to stir the grain in the rice silo; and the controller is configured to perform the method as described in any one of claims 1 to 10.

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