CN111595121A - Tea seed drying-machine intelligence temperature control system - Google Patents
Tea seed drying-machine intelligence temperature control system Download PDFInfo
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- CN111595121A CN111595121A CN202010454928.2A CN202010454928A CN111595121A CN 111595121 A CN111595121 A CN 111595121A CN 202010454928 A CN202010454928 A CN 202010454928A CN 111595121 A CN111595121 A CN 111595121A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/10—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/02—Biomass, e.g. waste vegetative matter, straw
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses an intelligent temperature control system of a tea seed dryer, which comprises a heat exchange furnace, a variable frequency draught fan, a tea seed drying area, a tea seed conveyor belt, a touch screen, a PLC (programmable logic controller), a temperature acquisition module and a splitter plate servo control module, wherein hot air generated by the heat exchange furnace is sent into the tea seed drying area through the variable frequency draught fan to dry tea seeds. Be equipped with baffle one and baffle two in tea seed drying area, divide into upper segment, middle section and lower region with the drying area to the tea seed is evenly dried. A first splitter plate and a second splitter plate are arranged at the inlet of the tea seed drying area, angles theta 1 and theta 2 between the splitter plates and the partition plates are adjusted, and the air quantity sent into the three areas can be adjusted, so that the temperatures of the three areas are kept consistent, and tea seeds are dried uniformly; the air quantity sent into the tea seed drying area can be adjusted by adjusting the speed of the variable-frequency draught fan, so that the heating temperature of tea seeds is controlled, and the temperature control of tea seed heating is realized.
Description
Technical Field
The invention relates to an intelligent temperature control system of a tea seed dryer, in particular to an intelligent temperature control system of a flat plate type dryer, wherein the drying process is carried out in three stages, and multiple layers of materials are dried simultaneously.
Background
The tea seed oil has high nutritive value and health care function, and is known as oriental olive oil. The contradiction between the supply and the demand of edible oil in China is prominent, about 60 percent of edible vegetable oil in China depends on import, the traditional herbal oil production is limited by land, and the development of the oil tea industry can rapidly increase the oil supply, so that the oil tea industry is increasingly emphasized by various governments and folks. The planting area of the camellia oleifera is rapidly enlarged, so that the processing and utilization of tea seeds become a research hotspot. If the water content of the tea seeds is too high, the tea seeds are fatigued and not easy to break, have large plasticity, and are easy to discharge materials during squeezing. Therefore, the tea seeds with too high water content are dried to ensure that the water content of the tea seeds reaches the specified range so as to facilitate shelling and embryo rolling, and the oil yield is directly influenced by the quality of the dried tea seeds. At present, tea seeds are dried mainly in three ways: natural drying, hot air drying and microwave drying. Wherein, the quality of the grease is better when hot air drying is adopted, and the acid value and the peroxide value are lower. However, the drying temperature and the heating process are mainly controlled manually in the current drying process, and the drying process cannot be accurately controlled, so that the drying degree and uniformity of tea seeds cannot be guaranteed, and the quality of the tea seeds is affected.
Disclosure of Invention
In order to solve the technical problem, the invention provides an intelligent temperature control system which is simple in structure and reliable in work and can accurately control the temperature of the whole drying process.
The utility model provides a tea seed drying-machine intelligence temperature control system, includes heat exchange furnace, frequency conversion draught fan, tea seed drying zone, tea seed conveyer belt, touch-sensitive screen, PLC, temperature acquisition module and flow distribution plate servo control module.
A first partition plate and a second partition plate are arranged in the tea seed drying area, and the drying area is divided into an upper area, a middle area and a lower area. And a first splitter plate and a second splitter plate are arranged at the inlet of the tea seed drying area, wherein the angle between the first splitter plate and the first partition plate is theta 1, and the angle between the second splitter plate and the second partition plate is theta 2. When the theta 1 is reduced, the air volume entering the upper area is reduced, and the air volume entering the middle area is increased; when θ 2 decreases, the amount of air entering the middle region decreases, and the amount of air entering the lower region increases.
The frequency conversion draught fan comprises a DA module, a frequency converter and a draught fan.
The temperature acquisition module comprises an AD module, a first temperature sensor, a second temperature sensor and a third temperature sensor. The first temperature sensor, the second temperature sensor and the third temperature sensor are respectively arranged in the upper area, the middle area and the lower area, are respectively used for detecting the real-time temperatures of the upper area, the middle area and the lower area, and feed back to the PLC through the AD module.
The touch screen is used as a measurement and control and display center of the system and is connected with the PLC, and the touch screen is used for sending a control instruction to the PLC, receiving data from the PLC and displaying the data.
The temperature acquisition module is used for acquiring the real-time temperature of tea seeds in the tea seed drying area and feeding back data to the touch screen through the PLC.
The touch screen compares the preset temperature and the real-time temperature of the tea seeds, reduces the rotating speed of the draught fan when the preset temperature is lower than the real-time temperature, so that the air quantity sent into the tea seed drying area is reduced, the temperature of the tea seeds is reduced, increases the rotating speed of the draught fan when the preset temperature is higher than the real-time temperature, increases the air quantity sent into the tea seed drying area, raises the temperature of the tea seeds, and finally enables the preset temperature to be consistent with the real-time temperature. The touch screen also compares the real-time temperature of the upper area and the middle area of the tea seeds, when the real-time temperature of the upper area is higher than that of the middle area, the touch screen controls the splitter plate servo control module to drive the splitter plate to rotate, so that the angle theta 1 is reduced, the air quantity entering the upper area is reduced, the air quantity entering the middle area is increased, and the temperature of the upper area is enabled to be consistent with that of the middle area; when the real-time temperature of the upper zone is lower than that of the middle zone, the adjustment process is reversed.
The touch screen also compares the real-time temperature of the lower region and the middle region of the tea seeds, and when the real-time temperature of the lower region is higher than that of the middle region, the touch screen controls the second splitter plate to drive the second splitter plate to rotate, so that the angle theta 2 is increased, the air volume entering the lower region is reduced, the air volume entering the middle region is increased, and the temperature of the lower region and the temperature of the middle region tend to be consistent; when the real-time temperature of the lower zone is lower than the real-time temperature of the middle zone, the adjustment process is reversed.
The touch screen also compares the real-time temperature of the lower area and the upper area of the tea seeds, when the real-time temperature of the lower area is higher than the real-time temperature of the upper area, the touch screen controls the flow distribution plate servo control module to drive the flow distribution plate II to rotate, the angle theta 2 is increased, the air volume entering the lower area is reduced, the air volume entering the middle area controlled by the flow distribution plate II is increased, meanwhile, the touch screen controls the flow distribution plate servo control module to drive the flow distribution plate I to rotate, the angle theta 1 is increased, the air volume entering the upper area is increased, the air volume entering the middle area controlled by the flow distribution plate I is reduced, the air volume entering the middle area is basically kept unchanged, and the temperature of the lower area and the temperature of the upper area are finally adjusted; when the real-time temperature of the lower zone is lower than that of the upper zone, the adjustment process is reversed.
The temperature curve, the angle theta 1 and the angle theta 2 of tea seeds, the current temperature and the working duration of the tea seeds can be displayed in real time on the operation interface of the touch screen, the heating curve of the tea seeds can be set on the operation interface of the touch screen, the temperature and the time of preheating, drying and cooling can be set, and a fan start-stop switch, an alarm indicator lamp and an emergency stop button are further arranged on the operation interface of the touch screen.
When the draught fan is started, the PLC controls the speed of the draught fan according to the frequency of the frequency converter arranged on the DA module through the heating curve, so that the air quantity sent into the tea seed drying area is controlled, and the drying temperature reaches the preset temperature.
When the adjusting process can not meet the set heating curve, the system can give an alarm for prompt, and in the heating process, the system can be subjected to emergency stop processing through an emergency stop button on an operation interface to protect the system.
Drawings
FIG. 1 is a schematic diagram of the intelligent temperature control system of a tea seed dryer according to the present invention;
FIG. 2 is a schematic diagram of the composition principle of the intelligent temperature control system of the tea seed dryer according to the invention;
fig. 3 is a schematic view of an operation interface of the intelligent temperature control system of the tea seed dryer according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the scope.
As shown in fig. 1 and 2, the intelligent temperature control system of the tea seed dryer according to the invention comprises a heat exchange furnace (1), a variable frequency induced draft fan (2), a tea seed drying area (3), a tea seed conveyor belt (4), a touch screen (5), a PLC (6), a temperature acquisition module (7) and a splitter plate servo control module (8).
Fig. 1 is a schematic structural diagram of an intelligent temperature control system of a tea seed dryer according to the invention. When the heat exchange furnace (1) is in an open state, hot air generated by the heat exchange furnace (1) is sent into the tea seed drying area (3) through the variable-frequency induced draft fan (2) to dry tea seeds. When the heat exchange furnace (1) is in a closed state, the frequency conversion induced draft fan (2) sends natural air (cold air) into the tea seed drying area (3) to cool the tea seeds.
As shown in figure 1, a first partition plate (3-6) and a second partition plate (3-7) are arranged in the tea seed drying area (3), and the tea seed drying area (3) is divided into an upper area (3-3), a middle area (3-4) and a lower area (3-5), so that the tea seed drying amount of each time is increased, and the tea seed drying uniformity and the drying quality can be guaranteed without being piled in one area. A first splitter plate (3-2) and a second splitter plate (3-1) are arranged at the inlet of the tea seed drying area (3), and the first splitter plate (3-2) and the second splitter plate (3-1) can rotate. The angle between the first splitter plate (3-2) and the first partition plate (3-6) is theta 1, and the angle between the second splitter plate (3-1) and the second partition plate (3-7) is theta 2.
Fig. 2 is a schematic diagram illustrating the principle of the intelligent temperature control system of the tea seed dryer according to the embodiment of the invention. The touch screen (5) is used as a measurement and control and display center of the system and is connected with the PLC (6), and the touch screen (5) is used for sending a control instruction to the PLC (6), receiving data from the PLC (6) and displaying the data.
As shown in fig. 1 and 2, the frequency conversion induced draft fan (2) is composed of a DA module (2-1), a frequency converter (2-2) and an induced draft fan (2-3). The start, stop, speed regulation and the like of the induced draft fans (2-3) are controlled by the touch screen (5) through the PLC (6). When the induced draft fan (2-3) is started and stopped, the touch screen (5) sends a starting and stopping command to the PLC (6), and the PLC (6) controls the output of the frequency converter (2-2) after receiving the command to start and stop the induced draft fan (2-3). When the rotating speed of the induced draft fan (2-3) is increased, the touch screen (5) sends an acceleration command to the PLC (6), and the PLC (6) receives the acceleration command and then controls the output frequency of the frequency converter (2-2) to be increased, so that the rotating speed of the induced draft fan (2-3) is increased, and the air volume fed into the tea seed drying area (3) is increased. In a similar way, when the rotating speed of the induced draft fan (2-3) is reduced, the touch screen (5) sends an acceleration command to the PLC (6), and the PLC (6) receives the command and then controls the output frequency of the frequency converter (2-2) to be reduced, so that the rotating speed of the induced draft fan (2-3) is reduced, and the air volume sent into the tea seed drying area (3) is reduced. When the draught fan (2-3) is used for conveying hot air, the temperature of the tea seeds rises quickly when the air quantity is large, and the temperature of the tea seeds rises slowly when the air quantity is small. When the draught fan (2-3) is used for conveying natural wind (cold wind), the temperature of the tea seeds is reduced quickly when the wind quantity is large, and the temperature of the tea seeds is reduced slowly when the wind quantity is small.
The temperature acquisition module (7) is composed of an AD module (7-1), a first temperature sensor (7-2), a second temperature sensor (7-3) and a third temperature sensor (7-4). The first temperature sensor (7-2) is arranged in the upper area (3-3) and is used for detecting the temperature of the tea seeds in the upper area (3-3); the temperature sensor II (7-3) is arranged in the middle area (3-4) and is used for detecting the temperature of the tea seeds in the middle area (3-4); and the third temperature sensor (7-4) is arranged in the lower region (3-5) and is used for detecting the temperature of the tea seeds in the lower region (3-5). The detected real-time temperature value is transmitted to the PLC (6) through the AD module (7-1) and is fed back to the touch screen (5) through the PLC (6).
As shown in fig. 1 and 2, the splitter plate servo control module (8) can drive the first splitter plate (3-2) and the second splitter plate (3-1) to rotate according to a command from the PLC (6), and adjust an angle between the first splitter plate and the second splitter plate and the partition plate. When the first splitter plate (3-2) is driven by the splitter plate servo control module (8) to rotate clockwise, the angle theta 1 between the first splitter plate (3-2) and the first partition plate (3-6) is reduced, so that the air volume entering the upper area (3-3) is reduced, and the air volume entering the middle area (3-4) is increased. When the second splitter plate (3-1) is driven by the splitter plate servo control module (8) to rotate clockwise, the angle theta 2 between the second splitter plate (3-1) and the second partition plate (3-7) is reduced, so that the air volume entering the lower area (3-5) is increased, and the air volume entering the middle area (3-4) is reduced.
Fig. 3 is a schematic view of an operation interface of an intelligent temperature control system of a tea seed dryer according to an embodiment of the invention. The temperature curve of the tea seeds, the angles theta 1 and theta 2 of the splitter plate (8-2) and the splitter plate (8-3), the current temperature of the tea seeds and the working time length can be displayed in real time on an operation interface. The tea seed heating is divided into three stages of preheating, drying and cooling, the heating curve of the tea seeds can be set on an operation interface, and the preheating, drying and cooling temperatures and times can be set. The operation interface is also provided with a fan start-stop switch, an alarm indicator light and an emergency stop button.
The control process of the embodiment of the present invention will be described in detail below with reference to fig. 1 to 3.
Firstly, heating curve parameter setting is carried out on a touch screen (5) according to a tea seed heating process, the preheating, drying and cooling temperatures and times are set, and then a fan start-stop switch is started. Touch-sensitive screen (5) give PLC (6) with data transfer, PLC (6) pass through DA module (2-1) according to the heating curve and set up the frequency of converter (2-2), control the speed of draught fan (2-3) to the amount of wind of control feeding into tea seed stoving district (3), make stoving temperature reach preset temperature.
In the upper area (3-3), the middle area (3-4) and the lower area (3-5), the real-time temperature of the tea seeds is detected by the temperature sensor (7-2), the temperature sensor (7-3) and the temperature sensor (7-4) respectively, and is transmitted to the PLC (6) through the AD module (7-1), and then the data is fed back to the touch screen (5) through the PLC (6).
According to the tea seed dryer intelligent temperature control system provided by the embodiment of the invention, the heating temperature of tea seeds can be controlled. The control process is as follows: the touch screen (5) compares the detected real-time temperature with the preset temperature, when the preset temperature is higher than the real-time temperature, the frequency of the frequency converter (2-2) is increased through the DA module (2-1) by the touch screen (5), the rotating speed of the induced draft fan (2-3) is increased, hot air is sent into the tea seed drying area (3) in an increasing mode, the temperature of tea seeds is increased, when the preset temperature is lower than the real-time temperature, the frequency of the frequency converter (2-2) is reduced through the DA module (2-1) by the touch screen (5), the rotating speed of the induced draft fan (2-3) is reduced, hot air is sent into the tea seed drying area (3) in a reducing mode, and the temperature of the tea seeds is reduced. And finally, the real-time temperature is equal to the preset temperature.
According to the tea seed dryer intelligent temperature control system provided by the embodiment of the invention, the heating temperatures of the tea seeds in the upper area (3-3), the middle area (3-4) and the lower area (3-5) can be controlled, so that the tea seeds in the upper area (3-3), the middle area (3-4) and the lower area (3-5) are uniformly heated, and the quality of the tea seeds is improved.
The specific control process is as follows:
the touch screen (5) compares the preset temperature and the real-time temperature of the tea seeds, when the preset temperature is lower than the real-time temperature, the touch screen (5) reduces the rotating speed of the induced draft fan (2-3), so that the air quantity fed into the tea seed drying area (3) is reduced, the temperature of the tea seeds is reduced, when the preset temperature is higher than the real-time temperature, the touch screen (5) increases the rotating speed of the induced draft fan (2-3), so that the air quantity fed into the tea seed drying area (3) is increased, the temperature of the tea seeds is raised, and finally the preset temperature is consistent with the real-time temperature,
the touch screen also compares the real-time temperature of the upper area (3-3) and the middle area (3-4) of the tea seeds, when the real-time temperature of the upper area (3-3) is higher than the real-time temperature of the middle area (3-4), the touch screen (5) controls the flow distribution plate servo control module (8) to drive the flow distribution plate I (3-2) to rotate, and the angle theta 1 is reduced, so that the air volume entering the upper area (3-3) is reduced, the air volume entering the middle area (3-4) is increased, and the temperature of the upper area (3-3) and the temperature of the middle area (3-4) tend to be consistent; when the real-time temperature of the upper area (3-3) is lower than the real-time temperature of the middle area (3-4), the adjusting process is opposite,
the touch screen also compares the real-time temperature of the lower region (3-5) of the tea seeds with the real-time temperature of the middle region (3-4), when the real-time temperature of the lower region (3-5) is higher than the real-time temperature of the middle region (3-4), the touch screen (5) controls the flow distribution plate servo control module (8) to drive the second flow distribution plate (3-1) to rotate, and the angle theta 2 is increased, so that the air volume entering the lower region (3-5) is reduced, the air volume entering the middle region (3-4) is increased, and the temperature of the lower region (3-5) is enabled to be consistent with the temperature of the middle region (3-4); when the real-time temperature of the lower region (3-5) is lower than the real-time temperature of the middle region (3-4), the adjusting process is opposite,
wherein, the touch screen also compares the real-time temperature of the lower area (3-5) and the upper area (3-3) of the tea seeds, when the real-time temperature of the lower area (3-5) is higher than the real-time temperature of the upper area (3-3), the touch screen (5) controls the flow distribution plate servo control module (8) to drive the flow distribution plate II (3-1) to rotate, so as to increase the angle theta 2, thereby reducing the air volume entering the lower area (3-5), increasing the air volume entering the middle area (3-4) controlled by the flow distribution plate II (3-1), meanwhile, the touch screen (5) controls the flow distribution plate servo control module (8) to drive the flow distribution plate I (3-2) to rotate, increasing the angle theta 1, thereby increasing the air volume entering the upper area (3-3), and reducing the air volume entering the middle area (3-4) controlled by the flow distribution plate I (3-2), the air quantity entering the middle area (3-4) is kept basically unchanged, and the temperature of the lower area (3-5) and the upper area (3-3) is adjusted to be consistent finally; when the real-time temperature of the lower area (3-5) is lower than the real-time temperature of the upper area (3-3), the adjustment process is reversed.
When the adjusting process can not meet the set temperature curve, the system can give an alarm. In the heating process, the system can be subjected to emergency stop treatment through an emergency stop button on an operation interface, so that the system is protected.
When the amount of the tea seeds is large, the drying uniformity of the tea seeds piled together is difficult to ensure. According to the embodiment of the invention, the tea seed drying area (3) is divided into the upper area (3-3), the middle area (3-4) and the lower area (3-5), so that the tea seeds can be effectively prevented from being stacked too thick, and meanwhile, the air volume entering the upper area (3-3), the middle area (3-4) and the lower area (3-5) is controlled by adjusting the flow distribution plates (8-2) and (8-3), so that the temperatures of the upper area (3-3), the middle area (3-4) and the lower area (3-5) can be kept consistent, the drying uniformity of the tea seeds is improved, and the drying efficiency of the tea seeds is improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The intelligent temperature control system of the tea seed dryer is characterized by comprising a heat exchange furnace (1), a variable-frequency draught fan (2), a tea seed drying area (3), a tea seed conveyor belt (4), a touch screen (5), a PLC (6), a temperature acquisition module (7) and a splitter plate servo control module (8), wherein the temperature acquisition module (7) and the splitter plate servo control module (8) are arranged in the heat exchange furnace
The tea seed drying area (3) is internally provided with a first partition plate (3-6) and a second partition plate (3-7), the drying area is divided into an upper area (3-3), a middle area (3-4) and a lower area (3-5), a first splitter plate (3-2) and a second splitter plate (3-1) are arranged at an inlet of the tea seed drying area (3), an angle between the first splitter plate (3-2) and the first partition plate (3-6) is theta 1, an angle between the second splitter plate (3-1) and the second partition plate (3-7) is theta 2, when the theta 1 is reduced, the air volume entering the upper area (3-3) is reduced, the air volume entering the middle area (3-4) is increased, and when the theta 2 is reduced, the air volume entering the middle area (3-4) is reduced, the air quantity entering the lower region (3-5) is increased,
the frequency conversion induced draft fan (2) comprises a DA module (2-1), a frequency converter (2-2) and an induced draft fan (2-3),
the temperature acquisition module (7) comprises an AD module (7-1), a first temperature sensor (7-2), a second temperature sensor (7-3) and a third temperature sensor (7-4), the first temperature sensor (7-2), the second temperature sensor (7-3) and the third temperature sensor (7-4) are respectively installed in the upper area (3-3), the middle area (3-4) and the lower area (3-5) and are respectively used for detecting the real-time temperature of the upper area (3-3), the middle area (3-4) and the lower area (3-5) and feeding back to the PLC (6) through the AD module (7-1),
the touch screen (5) is used as a measurement and control and display center of the system and is connected with the PLC (6), the touch screen (5) is used for sending a control instruction to the PLC (6), receiving and displaying data from the PLC (6),
the temperature control system is characterized in that a preset temperature of tea seeds is set on the touch screen (5) according to a tea seed heating process, the preset temperature is transmitted to the PLC (6), the temperature acquisition module (7) acquires the real-time temperature of the tea seeds in the tea seed drying area (3), and data are fed back to the touch screen (5) through the PLC (6), wherein the temperature control system is used for controlling the temperature of the tea seeds in the tea seed drying area to be constant, and the temperature of the tea seeds is controlled by the temperature
The touch screen (5) compares the preset temperature of the tea seeds with the real-time temperature, when the preset temperature is lower than the real-time temperature, the touch screen (5) reduces the rotating speed of the draught fan (2-3) so as to reduce the air volume sent into the tea seed drying area (3) and lower the temperature of the tea seeds, when the preset temperature is higher than the real-time temperature, the touch screen (5) increases the rotating speed of the draught fan (2-3) so as to increase the air volume sent into the tea seed drying area (3) and raise the temperature of the tea seeds, and finally the preset temperature and the real-time temperature tend to be consistent,
the touch screen (5) is used for comparing the real-time temperature of the upper area (3-3) and the middle area (3-4) of the tea seeds, when the real-time temperature of the upper area (3-3) is higher than the real-time temperature of the middle area (3-4), the touch screen (5) controls the flow distribution plate servo control module (8) to drive the first flow distribution plate (3-2) to rotate, the angle theta 1 is reduced, so that the air volume entering the upper area (3-3) is reduced, the air volume entering the middle area (3-4) is increased, and the temperature of the upper area (3-3) and the temperature of the middle area (3-4) tend to be consistent; when the real-time temperature of the upper zone (3-3) is lower than the real-time temperature of the middle zone (3-4), the adjustment process is reversed,
the touch screen (5) is used for comparing the real-time temperature of the lower region (3-5) of the tea seeds with the real-time temperature of the middle region (3-4), when the real-time temperature of the lower region (3-5) is higher than the real-time temperature of the middle region (3-4), the touch screen (5) controls the splitter plate servo control module (8) to drive the second splitter plate (3-1) to rotate, the angle theta 2 is increased, so that the air volume entering the lower region (3-5) is reduced, the air volume entering the middle region (3-4) is increased, and the temperature of the lower region (3-5) and the temperature of the middle region (3-4) tend to be consistent; when the real-time temperature of the lower region (3-5) is lower than the real-time temperature of the middle region (3-4), the adjustment process is reversed,
wherein, the touch screen (5) also compares the real-time temperature of the lower area (3-5) and the upper area (3-3) of the tea seeds, when the real-time temperature of the lower area (3-5) is higher than the real-time temperature of the upper area (3-3), the touch screen (5) controls the splitter plate servo control module (8) to drive the splitter plate II (3-1) to rotate, the angle theta 2 is increased, so that the air volume entering the lower area (3-5) is reduced, the air volume entering the middle area (3-4) controlled by the splitter plate II (3-1) is increased, meanwhile, the touch screen (5) controls the splitter plate servo control module (8) to drive the splitter plate I (3-2) to rotate, the angle theta 1 is increased, so that the air volume entering the upper area (3-3) is increased, reducing the air quantity entering the middle area (3-4) controlled by the first flow distribution plate (3-2) to ensure that the air quantity entering the middle area (3-4) is basically kept unchanged, and finally adjusting the temperature of the lower area (3-5) and the upper area (3-3) to be consistent; when the real-time temperature of the lower area (3-5) is lower than the real-time temperature of the upper area (3-3), the adjustment process is reversed.
2. The intelligent temperature control system of the tea seed dryer according to claim 1, further characterized in that a temperature curve of tea seeds, the angle θ 1 and the angle θ 2, and a current temperature and a working duration of the tea seeds can be displayed on an operation interface of the touch screen (5) in real time, a heating curve of the tea seeds can be set on the operation interface of the touch screen (5), temperatures and times of preheating, drying and cooling can be set, and a fan start-stop switch, an alarm indicator light and an emergency stop button are further arranged on the operation interface of the touch screen (5).
3. The intelligent temperature control system of the tea seed dryer according to claim 1, further characterized in that when the induced draft fan (2-3) is started, the PLC (6) sets the frequency of the frequency converter (2-2) through the DA module (2-1) according to the heating curve, controls the speed of the induced draft fan (2-3), and accordingly controls the air volume fed into the tea seed drying area (3) and enables the drying temperature to reach a preset temperature.
4. The intelligent temperature control system of a tea seed dryer according to claim 1, further characterized in that when the adjustment process fails to meet the set heating curve, the system gives an alarm, and in the heating process, the system can be subjected to emergency stop treatment through the emergency stop button on the operation interface to protect the system.
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