Intelligent persimmon air-drying device based on solar power supply and design method

Abstract

The invention discloses an intelligent persimmon air-drying device based on solar power supply and a design method, and the design method comprises the following steps: placing an intelligent drying box and a solar cell panel in an open unshielded area, adjusting the solar cell panel to form a 28-degree slope with the horizontal plane, and placing the solar cell panel directly facing the sun; system initialization is carried out through sensor self-inspection, energy storage SOC and reading; a plurality of fresh persimmons with good quality, good taste and moderate size are taken, and are neatly arranged and placed in a drying box; according to the initial water content, sugar content and solar radiation intensity of persimmons, a suitable drying process template is selected, and a frequency conversion fan, a PTC ceramic heater and a TEC semiconductor chilling plate are started. The scientific problems that a traditional persimmon air-drying process is low in efficiency, high in energy consumption and uncontrollable in sanitary condition, and electric heating air-drying equipment depends on fossil energy, is large in carbon emission and the like are solved, and intelligent, economical and efficient application of a renewable energy technology based on solar power supply in the technical field of agricultural product processing is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural product processing and renewable energy application, and particularly relates to an intelligent persimmon drying device powered by solar energy and a design method thereof. Background Art

[0002] Persimmon cakes, as traditional Chinese characteristic agricultural products, are deeply loved by consumers at home and abroad. Traditional persimmon cake drying devices mainly rely on natural drying or simple mechanical means for assistance. Among them, natural drying mainly dehydrates persimmons by relying on solar radiation and natural wind force in open-air sites (cement floors, bamboo mats, wooden or rope drying racks, etc.) and under rain shelters; common simple mechanical drying assistance means mainly include simple machines such as setting louvers or ventilation windows, setting coal / wood stoves or electric heating tubes, and axial flow fans. The traditional drying method has a long drying period, which takes 15 - 30 days, and is easily interfered by rainy and dusty weather, resulting in a mildew loss rate as high as 20% - 30%; open-air drying is easily contaminated by insects and dust, and it is difficult to meet the modern food processing hygiene standards; moreover, the uncontrollable temperature and humidity are likely to cause uneven sugar analysis, epidermal hardening or browning of persimmon cakes, affecting the taste and commercial value. Relying on electric heating drying equipment mainly relies on fossil energy for power supply, with a large energy consumption intensity, and is easy to release a large amount of CO2, which is contrary to the concept of green agricultural development. Secondly, the demand for additive-free and high-quality persimmon cakes in the domestic and foreign markets is increasing, and the traditional process is difficult to meet the requirements of its standardized and large-scale production. Most of the persimmon production areas in China are distributed in remote rural areas. Traditional drying requires frequent turning, rain protection and dust prevention. The outflow of young and middle-aged labor force has led to the shrinkage of the processing scale, and the high power supply cost of diesel generators and the like restricts the popularization and development of rural mechanized processing. Therefore, there is an urgent need to propose an intelligent persimmon drying device and method powered by solar energy. Summary of the Invention

[0003] To solve the above technical problems, the present invention proposes an intelligent persimmon drying device powered by solar energy and a design method thereof. Through technological innovation, the agricultural product processing technology and renewable energy technology are deeply integrated. By integrating solar power supply, multi-parameter coupling regulation and modular optimization, it specifically solves the problems of energy consumption, quality and large-scale production in traditional persimmon cake processing, meets the requirements of agricultural modernization and low-carbonization, provides a green and efficient solution for fruit and vegetable drying, and has significant economic benefits and social and ecological values.

[0004] On the one hand, to achieve the above object, the present invention provides an intelligent persimmon drying device powered by solar energy, including:

[0005] A foldable solar photovoltaic power supply device and an integrated intelligent drying device;

[0006] The foldable solar photovoltaic power supply device and the integrated intelligent drying device are connected through power transmission and hot air circulation control.

[0007] The foldable solar photovoltaic power supply device is equipped with multiple solar panels, a light-tracking bracket, a photosensitive sensor, and an energy storage regulation system;

[0008] The integrated intelligent drying device integrates a circulating air duct unit, a multi-stage temperature and humidity regulation module, and an intelligent control terminal.

[0009] Optionally, the foldable solar photovoltaic power supply device and the integrated intelligent drying device are connected through power transmission and hot air circulation control, including:

[0010] The solar panels convert light energy into electrical energy, which is connected to a storage battery through a cable for energy storage, and then distributed to each electrical component of the drying system by a power configuration device; the direct current output by the storage battery supplies an electric heating rod, a duct fan, and an intelligent temperature and humidity controller;

[0011] The temperature and humidity sensors in the drying box continuously monitor the environmental data and transmit it to the control panel through a signal line; the control panel adjusts the power of the electric heating rod and the rotation speed of the fan according to the set algorithm to achieve precise temperature control; the intake fan inhales external air, heats it through the electric heating rod, and evenly sends it into the drying box through the air supply duct; the dehumidification system starts when the humidity exceeds the standard to discharge moisture.

[0012] Optionally, the energy storage regulation system uses a cascade utilization lithium battery pack.

[0013] Optionally, the surface of the integrated intelligent drying device is sequentially provided with a mode selection switch, a temperature control switch, a humidity control switch, a wind control switch, and a duration control switch.

[0014] Optionally, the circulating air duct unit uses a variable frequency fan vertically arranged inside the dryer cabinet.

[0015] Optionally, the temperature and humidity regulation module includes five groups of temperature and humidity sensors, a PTC ceramic heater, and a TEC semiconductor refrigeration sheet.

[0016] Optionally, the intelligent control terminal includes a main control chip, a power supply, a communication interface, and a storage unit.

[0017] On the other hand, to achieve the above object, the present invention also provides a design method for an intelligent persimmon air-drying device powered by solar energy, including:

[0018] S1. Place the intelligent drying box and the solar panels in an open and unobstructed area, and adjust the solar panels to face the sun at a 28° slope to the horizontal plane;

[0019] S2. Perform system initialization through sensor self-check, energy storage SOC, and reading;

[0020] S3. Take several fresh persimmons with good quality, taste and moderate size, arrange them neatly and place them in a drying oven.

[0021] S4. According to the initial water content, sugar content of the persimmons and the solar radiation intensity, select a suitable drying process template, and start the variable-frequency blower, PTC ceramic heater and TEC semiconductor refrigeration chip.

[0022] Technical effects of the present invention:

[0023] (1) The intelligent persimmon air-drying device of the present invention uses solar power generation. Compared with the traditional persimmon air-drying process, it reduces the dependence on fossil fuels, realizes zero-carbon drive, and reduces carbon emissions by 100%. The cost of using photovoltaic power generation is 1 / 4 of that of coal-fired power, and the energy saving is more than 80%; at the same time, it improves the adaptability and flexibility of the air-drying technology, and enhances the ability to resist weather interference.

[0024] (2) The present invention greatly shortens the air-drying cycle and improves the air-drying efficiency. Traditional natural drying takes 15 - 30 days, coal-fired drying takes 5 - 8 days, while the intelligent drying only takes 3 - 5 days. Compared with the traditional air-drying process, the intelligent air-drying increases the sugar content of the persimmon cakes by 25%, reduces the mildew rate to 1%, reduces the defective rate, and significantly enhances the quality stability of the persimmon cakes, meeting the food safety and hygiene standards.

[0025] (3) The temperature and humidity of the present invention are dynamically regulated by the PID algorithm, which can accurately reproduce the best drying curve. At the same time, with multiple-mode process templates, it can flexibly handle variety diversity. The present invention realizes full-automatic operation, avoids the need for full-time attendance, and reduces the labor cost by 80%.

[0026] (4) Compared with the traditional air-drying process, the present invention is free of energy supply by solar energy, modular and easy to repair, conforms to the national carbon neutrality strategy, can achieve long-term industrial compliance, and reduces the comprehensive cost by 60%.

[0027] (5) The industrial development has important social and ecological values. It not only solves the problem of rural energy shortage, promotes the industrialization of persimmon processing, increases farmers' income, but also reduces 1.2t of CO2 emissions per ton of persimmon cakes, contributes to the "dual carbon" goal, and provides a replicable green solution for the drying of other fruits and vegetables. Description of the Drawings

[0028] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0029] Figure 1 It is a schematic flow chart of the design method of an intelligent persimmon air-drying device based on solar power supply according to an embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the foldable solar photovoltaic power supply device according to an embodiment of the present invention;

[0031] Figure 3 Front view of the intelligent dryer device according to an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the distribution of the internal variable frequency fan and exhaust holes of the intelligent dryer according to an embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the distribution of the upper and lower surface semiconductor refrigeration chips and PTC auxiliary heating tubes of the intelligent dryer according to an embodiment of the present invention;

[0034] Figure 6 Main components of the intelligent terminal control according to an embodiment of the present invention;

[0035] Figure 7 Curves of temperature, humidity, sugar content and moisture content on sunny days according to an embodiment of the present invention;

[0036] Figure 8 Curves of temperature, humidity, sugar content and moisture content on cloudy and rainy days according to an embodiment of the present invention;

[0037] Reference numerals: 1 - foldable solar photovoltaic panel, 2 - light tracking bracket, 3 - photosensitive sensor, 4 - cascade utilization lithium battery pack, 5 - mode selection switch, 6 - temperature control switch, 7 - humidity control switch, 8 - wind control switch, 9 - duration control switch, 10 - variable frequency fan (rotation speed 800 rpm), 11 - PTC auxiliary heating tube (power 1.5 KW), 12 - TEC semiconductor refrigeration chip, 13 - central control chip, 14 - power supply, 15 - communication interface, 16 - storage unit. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0040] As Figures 2 - 6As shown in the figure, in this embodiment, an intelligent persimmon drying device powered by solar energy is provided, including: a solar photovoltaic power supply device and an intelligent drying device; the foldable solar photovoltaic power supply device should be equipped with multiple solar panels and an energy storage and regulation system, and the integrated intelligent dryer should integrate a circulating air duct unit, a multi-stage temperature and humidity regulation module, and an intelligent control terminal.

[0041] The connection methods between the foldable solar photovoltaic power supply device and the integrated intelligent drying device mainly include power transmission connection and hot air circulation control connection, which are specifically as follows:

[0042] Power transmission connection:

[0043] (1) Photovoltaic panel → storage battery → power configuration device:

[0044] The solar panel converts light energy into electrical energy, which is connected to the storage battery (such as a lead-acid battery pack) through a cable for energy storage, and then distributed to each electrical component of the drying system by the power configuration device (such as an inverter and a voltage stabilizer).

[0045] (2) Storage battery → electric heating rod / fan / control system:

[0046] The direct current (or alternating current after inversion) output by the storage battery is supplied to the electric heating rod (for air heating), the duct fan (for hot air circulation), and the intelligent temperature and humidity controller (such as a PLC or a microprocessor).

[0047] Hot air circulation control connection:

[0048] (1) Intelligent temperature and humidity sensor → control panel → electric heating / fan adjustment:

[0049] The temperature and humidity sensor in the drying box monitors the environmental data in real time and transmits it to the control panel (control center) through a signal line (such as RS485, analog input). The control panel adjusts the power of the electric heating rod and the speed of the fan according to the set algorithm to achieve precise temperature control.

[0050] (2) Intake device → electric heating → drying chamber:

[0051] The intake fan (driven by a motor) sucks in external air, heats it through the electric heating rod, and then evenly sends it into the drying box through the air supply duct. The dehumidification system (such as an automatic air door + dehumidification fan) is activated when the humidity exceeds the standard to discharge the moisture.

[0052] The foldable solar photovoltaic power supply device should be equipped with multiple solar panels 1, a light tracking bracket 2, a photosensitive sensor 3, and an energy storage and regulation system; the energy storage and regulation system uses a cascade utilization lithium battery pack 4.

[0053] The surface of the integrated intelligent drying device is successively provided with a mode selection switch 5, a temperature control switch 6, a humidity control switch 7, a wind control switch 8, and a duration control switch 9.

[0054] The circulating air duct unit uses a variable-frequency fan 10 vertically arranged inside the dryer casing; the temperature and humidity regulation module includes five groups of temperature and humidity sensors, a PTC ceramic heater 11, and a TEC semiconductor refrigeration chip 12; the intelligent control terminal includes a main control chip 13, a power supply 14, a communication interface 15, and a storage unit 16.

[0055] The operation process of the device of the present invention includes:

[0056] Unfold the foldable solar panel and adjust it to an inclination angle of 28°, ensuring that the photovoltaic panel faces the sun directly. Connect the drying box to the energy storage system, start the control terminal, and perform self-checks on the temperature and humidity, moisture content, sugar content, and light intensity sensors. Arrange fresh persimmons (initial moisture content 75% - 80%) neatly on the multi-layered hollow trays (spacing 30 cm), and push them into the drying box.

[0057] If the solar radiation intensity > 600 W / m 2 , start the photovoltaic direct-drive PTC ceramic heater and the variable-frequency fan to soften the persimmons; if the solar radiation intensity < 300 W / m 2 , switch to energy storage power supply, set the temperature to 25°C, the humidity to 70%, the wind speed to 0.8 m / s, and the duration to 6 - 8 hours until the moisture content drops to 65%.

[0058] If the moisture content of the persimmons reaches 45% - 65%, start the PTC ceramic heater to 45°C, lower the humidity to 50%, and increase the wind speed to 2.2 m / s. If the real-time sugar content detected by the refractometer > 18%, lower the temperature to 42°C to prevent coking; if the sugar content < 15%, extend the heating duration by 3 hours.

[0059] If the moisture content of the persimmons is 45% - 30% and the solar radiation > 800 W / m 2 , start the TEC semiconductor refrigeration chip to dehumidify until the humidity is 30%, maintain the temperature at 38°C stably, and the wind speed is 1.5 m / s; if the solar radiation < 200 W / m 2 , lower the wind speed to 1.0 m / s, give priority to energy storage power supply and maintain the temperature stable.

[0060] If the moisture content of the persimmons is 30% - 22% and the sugar content > 28%, start the TEC semiconductor refrigeration chip to dehumidify, increase the humidity to 30%, set the temperature to 30°C, and the wind speed to 0.8 m / s; if the sugar content < 25%, lower the humidity to 25% and extend the drying time by 2 hours.

[0061] When the moisture content drops to 22%, the control terminal triggers the buzzer alarm device, automatically shuts down the heater and fan, starts the cooling mode, and ventilates naturally for 10 minutes until the dried persimmons cool down. Then clean the condensate collection box and tray residues, fold the solar panels and shut down.

[0062] The integrated intelligent drying device of the present invention has a simple structure, is easy to operate, has controllable quality of finished products, does not require manual intervention, and has strong applicability and flexibility.

[0063] like Figure 1 As shown, this embodiment also provides a design method for an intelligent persimmon air-drying device based on solar power supply, including:

[0064] Step 1: Place the smart drying box and solar panel in an open, unobstructed area, and adjust the solar panel to face the sun at a 28° slope with the horizontal plane;

[0065] Step 2: Initialize the system through sensor self-check and energy storage SOC (State of Charge) reading;

[0066] Step 3: Take a number of fresh persimmons of good quality and moderate size, and place them neatly (30cm apart) in the drying box;

[0067] Step 4: According to the initial moisture content, sugar content and solar radiation intensity of the persimmons, select a suitable drying process template and start the variable frequency fan, PTC ceramic heater and TEC semiconductor cooling chip.

[0068] Specifically, in step 4, according to the initial water content, sugar content and solar radiation intensity of the persimmons, a suitable drying process template is selected, which specifically includes the following steps:

[0069] In step 3, the selection of persimmons should mainly avoid varieties with coarse fibers, many cores, high water content, and thick peels, such as ox-heart persimmons. Preferentially choose persimmons with a water content of about 75% and high sugar content (≥18%), such as Shaanxi Fuping pointed persimmons (sugar content 20% to 24%, firm flesh, uniform frost) and Shandong mirror persimmons (sugar content 18% to 22%, round fruit shape, easy to remove astringency); low tannin content, choose varieties that are easy to remove astringency or sweet persimmons, such as Yangfeng and Cilang. The best time to pick persimmons is around the time of frost in the north (late October), and in the south in advance (to avoid overripeness). The persimmon peel is orange-red or orange-yellow, and the hardness is moderate (slightly sunken when lightly pressed with fingers).

[0070] In Step 4, quickly measure the initial moisture content and sugar content of the persimmons. Randomly sample and test the persimmon fruits using a resistive moisture meter and a portable near-infrared refractometer respectively, and take the average value. The resistive moisture meter mainly calculates the moisture content by the negative correlation between the pulp resistance value and the moisture content. Insert the probe of the moisture meter into the persimmon fruit (avoiding the fruit core) and read the displayed value. This instrument can quickly measure the moisture content of the persimmons. The portable near-infrared refractometer measures the sugar content of the persimmons by analyzing the vibration characteristics of sugar molecules through near-infrared spectroscopy and modeling and inversion of the sugar content. The steps are as follows: press the probe of the refractometer tightly against the surface of the persimmon fruit, trigger the scan, and the sugar content will be displayed within 5 seconds. Its advantage is that it does not need to damage the fruit and is suitable for grading and screening.

[0071] Step 4.1, when the initial moisture content of the persimmons is 75% - 65%, select the softening mode for the drying process template. When the solar radiation intensity > 600 W / m 2 , start the variable-frequency fan and PTC auxiliary heating simultaneously, set the temperature to 25 - 30 °C, the humidity to 65% - 70%, the wind speed to 0.5 - 1.0 m / s, and the air-drying duration to 6 - 8 hours; when the solar radiation intensity < 300 W / m 2 , enable the energy storage power supply;

[0072] Step 4.2, when the moisture content of the persimmons is 65% - 45%, select the astringency-removing mode for the drying process template. If the sugar content > 18%, start the PTC ceramic heater, set the temperature to 40 - 45 °C, the humidity to 40% - 50%, the wind speed to 2.0 - 2.5 m / s, and the air-drying duration to 25 - 36 hours; when the sugar content < 15%, continue the PTC auxiliary heating, and extend the heating duration by 2 - 3 hours;

[0073] Step 4.3, when the moisture content of the persimmons is 45% - 30%, select the saccharification mode for the drying process template. When the solar radiation > 800 W / m 2 , enable the TEC semiconductor refrigeration chip for active dehumidification, set the temperature to 35 - 38 °C, the humidity to 30% - 35%, the wind speed to 1.2 - 1.5 m / s, and the air-drying duration to 12 - 18 hours; when the solar radiation < 200 W / m 2 , reduce the wind speed to 1.0 m / s and maintain the temperature stability;

[0074] Step 4.4, when the moisture content of the persimmons is 30% - 22%, select the shaping mode for the drying process template. When the sugar content > 28%, enable the TEC semiconductor refrigeration chip for dehumidification, control the temperature at 30 - 32 °C, and increase the humidity setting to 30%, with the wind speed at 0.8 - 1.0 m / s; when the sugar content < 25%, reduce the humidity to 25% - 28%, and extend the air-drying duration by 1 - 2 hours.

[0075] The specific application examples of the present invention are as follows:

[0076] Example 1

[0077] Select 500 kg of Fuping pointed persimmons as the experimental materials. The weather during the experimental period is in sunny mode. The initial moisture content of the fresh persimmons is 78%, and the sugar content is 17%, as Figure 7 shown. Table 1 shows the duration, energy consumption, final moisture content, and sugar content in each stage of this drying process.

[0078] Table 1

[0079]

[0080]

[0081] The total energy consumption of this experiment is 19.6 kWh, and the unit energy consumption is only 0.039 kWh / kg; the sugar content uniformity is ±3%, and there is no mildew or cracking.

[0082] In the traditional persimmon air-drying process, natural drying is used on sunny days. The time-consuming, energy-consuming, final moisture content, etc. of Fuping pointed persimmons of the same quality are shown in Table 2.

[0083] Table 2

[0084] Index Total elapsed time Unit energy consumption Final moisture content Drying uniformity Mildew risk Natural sun drying 25 - 30 days No direct energy consumption 22％～25％ Sugar degree difference ±12% High

[0085] Although the intelligent air-drying method consumes more energy compared with the traditional natural drying method, the intelligent air-drying method uses solar power generation as clean energy, avoiding the emission of CO2 during the combustion of fossil fuels; the total time-consuming of the intelligent air-drying is only 67 hours, and the air-drying period is advanced by nearly 22 - 27 days, which provides conditions for the industrialization of persimmon air-drying; at the same time, the intelligent air-drying method greatly reduces the mildew risk during the persimmon cake air-drying process, reduces waste, and improves the sugar content uniformity of the persimmon cake.

[0086] Example 2

[0087] In this experiment, 300 kg of mirror persimmons are selected as the research object, and the experimental weather is in rainy mode. The initial moisture content of the fresh persimmons in this experiment is 76%, and the sugar content is 15%. Table 3 shows the duration, energy consumption, final moisture content, and sugar content in each stage of this experiment.

[0088] Table 3

[0089] Stage Duration / hour Energy consumption / kWh Final moisture content Sugar degree / °Brix Softening period 9 2.1 63％ 16 Astringency removal period 35 6.8 43％ 20 Saccharification period 20 4.3 28％ 24 Setting period 18 3.5 22％ 26

[0090] The total energy consumption of this experiment is 16.7 kWh, and the unit energy consumption is only 0.056 kWh / kg. Through this experiment, it is verified that the 72-hour rainy-day endurance ability of this device meets the experimental requirements.

[0091] In the traditional persimmon air-drying process, multiple baking processes are often used on rainy and cloudy days. The time-consuming, energy-consuming, etc. of air-drying 300 kg of mirror persimmons by the traditional process are shown in Table 4.

[0092] Table 4

[0093]

[0094] Compared with the traditional air-drying process, such as Figure 8 shown, the intelligent overcast air-drying method greatly reduces the energy consumption during the air-drying process, reduces the unit energy consumption by nearly 2.4 - 3.4 kWh / kg, and reduces the risk of mildew during air-drying.

[0095] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An intelligent persimmon drying device powered by solar energy, characterized in that, Comprising: A foldable solar photovoltaic power supply device and an integrated intelligent drying device; The foldable solar photovoltaic power supply device and the integrated intelligent drying device are connected through power transmission connection and hot air circulation control connection; The foldable solar photovoltaic power supply device is equipped with multiple solar panels (1), a light tracking bracket (2), a photosensitive sensor (3) and an energy storage regulation system; The integrated intelligent drying device integrates a circulating air duct unit, a multi-stage temperature and humidity regulation module and an intelligent control terminal.

2. The intelligent persimmon air-drying device powered by solar energy according to claim 1, characterized in that, The foldable solar photovoltaic power supply device and the integrated intelligent drying device are connected through power transmission connection and hot air circulation control connection, including: The solar panels convert light energy into electrical energy, which is connected to a storage battery through a cable for energy storage, and then distributed to each electrical component of the drying system by a power configuration device; the direct current output by the storage battery supplies power to the electric heating rod, the duct fan, and the intelligent temperature and humidity controller; The temperature and humidity sensors in the drying box continuously monitor the environmental data and transmit it to the control panel through signal lines; the control panel adjusts the power of the electric heating rod and the rotation speed of the fan according to the set algorithm to achieve precise temperature control; the intake fan inhales external air, heats it through the electric heating rod, and evenly sends it into the drying box through the air supply duct; the moisture exhaust system starts when the humidity exceeds the standard to exhaust moisture.

3. The intelligent persimmon air-drying device powered by solar energy according to claim 1, characterized in that, The energy storage regulation system uses a cascaded utilization lithium battery pack (4).

4. The intelligent persimmon drying device powered by solar energy according to claim 1, characterized in that On the surface of the integrated intelligent drying device, a mode selection switch (5), a temperature control switch (6), a humidity control switch (7), a wind control switch (8), and a duration control switch (9) are sequentially arranged.

5. The intelligent persimmon drying device powered by solar energy according to claim 1, wherein The circulating air duct unit uses a variable frequency fan (10) vertically arranged inside the dryer chassis.

6. The intelligent persimmon drying device powered by solar energy according to claim 1, wherein The temperature and humidity regulation module includes five groups of temperature and humidity sensors, a PTC ceramic heater (11) and a TEC semiconductor refrigeration sheet (12).

7. The intelligent persimmon air-drying device powered by solar energy according to claim 1, characterized in that The intelligent control terminal includes a main control chip (13), a power supply (14), a communication interface (15) and a storage unit (16).

8. A design method of an intelligent persimmon drying device based on solar power supply according to any one of claims 1-7, characterized in that, Including: S1. Place the intelligent drying box and the solar panels in an open and unobstructed area, and adjust the solar panels to face the sun at a 28° slope to the horizontal plane; S2. Perform system initialization through sensor self-check, energy storage SOC, and reading; S3. Take a number of fresh persimmons with good quality, taste and appropriate size, and arrange them neatly in the drying box; S4. According to the initial water content, sugar content of the persimmons and the solar radiation intensity, select a suitable drying process template, and start the variable frequency fan, PTC ceramic heater and TEC semiconductor refrigeration sheet.

Images