Drying and cooling all-in-one machine and control method thereof

Abstract

The invention relates to the technical field of agricultural machinery, in particular to a drying and cooling all-in-one machine and a control method thereof, a drying section, a discharging section and a collecting section are sequentially arranged from top to bottom in the vertical direction, and drying and cooling procedures are integrated. The discharging section comprises a third ventilation structure, a plurality of material guiding structures and a conveying structure, the material guiding structures are connected in parallel in a sealed mode to form a material distributing angle, the third ventilation structure is arranged below the material distributing angle, and the air blowing direction downwards covers the conveying area; the conveying structure is horizontally arranged under the discharging space, and a material blocking gap matched with the maximum outer diameter of materials is formed between the bottom end of the discharging space and the conveying structure. The layout does not need additional cooling equipment, the cost and occupied field are reduced, material transfer damage is avoided, and smooth procedure connection is guaranteed; the material blocking gap enables the materials to be flatly laid in a single layer, uniform cooling is achieved in cooperation with precise cold air covering, the materials are prevented from getting damp and being damaged, the storage stability is improved, the material collecting opening guarantees ordered discharging, and the production efficiency and the material quality are improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to an integrated drying and cooling machine and its control method. Background Technology

[0002] Dryers use hot air circulation and infrared radiation to heat and dry materials, removing free moisture to improve storage stability and prevent problems such as mold and clumping during long-term storage, ensuring smooth subsequent warehousing or deep processing. In large-scale production scenarios, materials are at high temperatures after drying. If they cannot be cooled to room temperature quickly and evenly, quality deterioration is highly likely. Therefore, cooling is an indispensable key process after drying. However, most dryers on the market do not integrate cooling devices. Usually, an additional independent cooling process is required after the dried material is discharged from the dryer to achieve temperature reduction.

[0003] Adding an extra cooling process not only increases equipment investment costs and production space requirements, but more importantly, it makes it difficult to guarantee cooling uniformity, which in turn has multiple adverse effects on the dried materials: When dried materials are discharged, they tend to accumulate and scatter randomly, making it difficult to form a stable, flat distribution after entering the independent cooling equipment. This results in uneven material layer thickness and temperature differences between areas of excessively rapid and insufficient cooling. These temperature differences can cause internal moisture migration, and the residual heat in insufficiently cooled materials can lead to moisture re-extraction, causing localized dampness, significantly reducing storage stability and increasing the risk of mold. Furthermore, uneven cooling can cause granular materials to break or crack due to differences in thermal stress, especially for heat-sensitive materials such as fruits, vegetables, and medicinal herbs, easily leading to nutrient loss and deterioration in appearance. In addition, the ventilation structure of existing independent cooling equipment lacks targeted design, and the cold air cannot be precisely matched to the material distribution area, further exacerbating the problem of uneven cooling. Moreover, the transfer of materials during process connections can easily cause secondary damage, significantly reducing the product qualification rate. Summary of the Invention

[0004] The main objective of this invention is to provide an integrated drying and cooling machine and its control method to solve the technical problem in the prior art where the dryer is not equipped with a cooling device and the material output from the dryer is cooled separately, resulting in uneven cooling.

[0005] To achieve the above objectives, the present invention provides an integrated drying and cooling machine, comprising a drying section, a discharge section, and a collection section arranged vertically from top to bottom. The drying section is equipped with hot air to dry the material, the discharge section is equipped with cold air to cool the material, and the collection section is fixed below the discharge section and is equipped with a collection port to receive the material. The discharge section includes a third ventilation structure, multiple material guiding structures, and a conveying structure. The multiple material guiding structures are arranged side by side along the conveying direction of the conveying structure. The sides of adjacent material guiding structures are sequentially sealed and connected, forming a material dividing angle. The interior of each material guiding structure encloses a discharge space. The third ventilation structure is located below the material dividing angle, and its airflow direction is downward, covering the conveying area of ​​the conveying structure. The conveying structure is horizontally located directly below the discharge space. A material blocking gap is provided between the bottom of the discharge space and the upper surface of the conveying structure. The width of the material blocking gap is consistent with the maximum outer diameter of the material, so that the material is laid flat in a single layer on the conveying structure.

[0006] Furthermore, the third ventilation structure includes multiple third ventilation pipes, the vertical cross-section of which is triangular. The third ventilation pipe is fixed below the material distribution angle, the sharp corner of which is in contact with the material distribution angle, and the lower part of which is connected to the discharge section to blow cold air onto the conveying structure.

[0007] Furthermore, it also includes an air inlet duct and an air return duct, which are respectively arranged on both sides of the drying and cooling integrated machine and are symmetrically arranged. The drying section includes a material flow area, a first ventilation structure and a second ventilation structure. The first ventilation structure and the second ventilation structure are fixed in the material flow area. The first ventilation structure and the second ventilation structure are respectively set at different heights. The first ventilation structure and the second ventilation structure are staggered in both the horizontal and vertical directions. One end of the first ventilation structure is closed and the other end of the first ventilation structure is connected to the air inlet duct. One end of the second ventilation structure is closed and the other end of the second ventilation structure is connected to the air return duct.

[0008] More preferably, the first ventilation structure includes a plurality of first ventilation pipes, the vertical cross-section of the first ventilation pipe is triangular, the tip of the first ventilation pipe is upward, one end of the first ventilation pipe is closed, the other end of the first ventilation pipe is connected to the air inlet pipe, and the bottom of the first ventilation pipe is connected to the material flow area; the second ventilation structure includes a plurality of second ventilation pipes, the vertical cross-section of the second ventilation pipe is triangular, the tip of the second ventilation pipe is upward, one end of the second ventilation pipe is closed, the other end of the second ventilation pipe is connected to the air return pipe, and the bottom of the first ventilation pipe is connected to the material flow area.

[0009] More preferably, it also includes a heating furnace, a circulation pipe and a circulation fan. The circulation pipe is located at the bottom of the drying and cooling integrated machine. The two ends of the circulation pipe are respectively connected to the air inlet pipe and the air return pipe to form a circulation loop. The circulation fan is fixed inside the circulation pipe and blows air towards the end where the air inlet pipe is located. The heating furnace is connected to the air inlet pipe.

[0010] More preferably, it also includes a dehumidifying fan, which is fixed to the return air duct and outlets towards the outside of the drying and cooling integrated machine.

[0011] Furthermore, the conveying structure includes a conveyor belt and a driving device. The conveyor belt includes a driving end and a driven end. The output end of the driving device is connected to the driving end to drive the conveyor belt to move horizontally toward the collection port.

[0012] More preferably, the conveying structure includes a first conveying component and a second conveying component, both of which include the conveyor belt and have the same conveying direction; the second conveying component is disposed above the first conveying component, and the material dropping end of the second conveying component protrudes towards the collection port relative to the material dropping end of the first conveying component; the first conveying component and the second conveying component correspond one-to-one with the material guiding structure in different columns along the lateral to inward direction of the drying and cooling integrated machine, thereby realizing multi-layer synchronous material discharge.

[0013] More preferably, the conveyor belt drive end of the first transmission component is connected to the drive device, and the conveyor belt drive end of the second transmission component is connected to the conveyor belt drive end of the first transmission component, so as to realize the synchronous drive of the first transmission component and the second transmission component.

[0014] More preferably, the collection port is located in the central area of ​​the material guiding structure, and the first transmission component and the second transmission component are each configured as two sets. The two sets of first transmission components are symmetrically distributed with respect to the collection port, and the two sets of second transmission components are symmetrically distributed with respect to the collection port. The material dropping end of the first transmission component and the material dropping end of the second transmission component both face the collection port.

[0015] The present invention also provides a control method for an integrated drying and cooling machine, applied to the integrated drying and cooling machine described above, comprising the following steps: S1. Obtain the real-time air pressure difference between the drying section and the discharge section, the real-time drying efficiency of the material in the drying section, and the real-time cooling efficiency of the discharge section. S2. Obtain the target air pressure difference threshold between the drying section and the discharge section, and determine whether the real-time air pressure difference is greater than or less than the target air pressure difference threshold; if the real-time air pressure difference is greater than the target air pressure difference threshold, proceed to step S3. S3. Obtain the qualified threshold for drying efficiency and the qualified threshold for cooling efficiency, determine whether the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency, and determine whether the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency. S4. If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is kept constant, and the conveying speed of the conveying structure is kept constant. The control process ends and returns to step S1.

[0016] Furthermore, step S1 specifically includes the following steps: S11. Obtain the internal air pressure of the drying section and the internal air pressure of the discharge section, and determine the real-time air pressure difference between the drying section and the discharge section based on the internal air pressure of the drying section and the internal air pressure of the discharge section. S12. Obtain the material feed humidity, material discharge humidity and preset drying time of the drying section, and determine the real-time drying efficiency of the material in the drying section based on the material feed humidity, material discharge humidity and preset drying time of the drying section. S13. Obtain the material feed temperature and material discharge temperature of the discharge section, and determine the real-time cooling efficiency of the discharge section based on the material feed temperature and material discharge temperature of the discharge section.

[0017] More preferably, step S4 further includes the following steps: If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is kept constant, the conveying speed of the conveying structure is reduced by the preset speed increment, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveying speed of the conveying structure remains unchanged, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveyor structure is reduced by the preset speed increment, and the process returns to step S2.

[0018] More preferably, if the real-time pressure difference is less than the target pressure difference threshold in step S2, then step S4 further includes the following steps: If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is reduced by the preset air volume, the conveying speed of the conveying structure is kept constant, and the process returns to step S2. Alternatively, if the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is reduced by a preset air volume, the conveying speed of the conveying structure is reduced by a preset speed increment, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveying speed of the conveying structure remains unchanged, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveyor structure is reduced by the preset speed increment, and the process returns to step S2.

[0019] Compared with the prior art, the present invention has the following beneficial effects: This invention integrates drying and cooling processes by vertically arranging a drying section, a discharge section, and a collection section from top to bottom. This eliminates the need for additional independent cooling equipment, effectively reducing equipment investment costs and production space requirements. It also avoids secondary damage during the traditional process of transferring dried materials to cooling equipment. Hot air in the drying section directly heats and dries the material, while cold air in the discharge section cools the hot material after drying, ensuring smooth process transitions and preventing quality deterioration caused by residual heat. The third ventilation structure blows downwards and covers the conveying area, allowing the cold air to precisely target the conveying material. The conveying structure is horizontally positioned directly below the discharge space, with a material-blocking gap adapted to the maximum outer diameter of the material. This forces the material to be conveyed in a single-layer, flat state, ensuring sufficient and uniform contact between the cold air and the material. This effectively prevents internal moisture migration, localized dampness, and thermal stress damage caused by uneven cooling, improving material storage stability. The collection port in the collection section centrally receives the cooled material, ensuring orderly discharge and further improving production efficiency and final material quality. Attached Figure Description

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

[0021] Figure 1 This is a front cross-sectional view of the overall structure in one embodiment of the present invention; Figure 2 for Figure 1A partially enlarged schematic diagram of the discharge section; Figure 3 This is a side sectional view of the overall structure in one embodiment of the present invention.

[0022] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0023] Explanation of icon numbers: 1. Drying section; 2. Discharge section; 3. Collection section; 4. Air inlet duct; 5. Return air duct; 6. Circulating fan; 7. Dehumidifying fan; 8. Circulating pipe; 9. Conveying structure; 10. Third ventilation duct; 11. Material guiding structure; 12. Material blocking plate; 13. Material blocking gap; 14. First conveying assembly; 15. Second conveying assembly; 16. Drive unit; 17. Collection port; 18. Driven end; 19. Material; 20. Drive end; 21. Moving wheel; 22. First ventilation duct; 23. Second ventilation duct; 24. Material flow zone; 25. Heating furnace. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0028] Please see Figures 1 to 3This embodiment provides a drying and cooling integrated machine, including a drying section 1, a discharge section 2 and a collection section 3 arranged vertically from top to bottom. The drying section 1 is equipped with hot air to dry the material 19, the discharge section 2 is equipped with cold air to cool the material 19, and the collection section 3 is fixed below the discharge section 2. The collection section 3 is equipped with a collection port 17 to receive the material 19. The discharge section 2 includes a third ventilation structure, multiple material guiding structures, and a conveying structure 9. The multiple material guiding structures are arranged side by side along the conveying direction of the conveying structure 9. The sides of adjacent material guiding structures are sequentially sealed and connected, forming a material dividing angle. The interior of the material guiding structures encloses a discharge space. The third ventilation structure is located below the material dividing angle, and the airflow direction of the third ventilation structure is downward and covers the conveying area of ​​the conveying structure 9. The conveying structure 9 is horizontally located directly below the discharge space. A material blocking gap 13 is provided between the bottom end of the discharge space and the upper surface of the conveying structure 9. The width of the material blocking gap 13 is consistent with the maximum outer diameter of the material 19, so that the material 19 is laid flat in a single layer on the conveying structure 9.

[0029] This embodiment integrates the drying and cooling processes by vertically arranging a drying section 1, a discharge section 2, and a collection section 3 from top to bottom. This eliminates the need for additional independent cooling equipment, effectively reducing equipment investment costs and production space requirements. It also avoids secondary damage during the traditional process of transferring dried material 19 to cooling equipment. The hot air from the drying section 1 directly heats and dries the material 19, while the cold air from the discharge section 2 cools the high-temperature material 19 after drying, ensuring smooth process transitions and preventing quality deterioration caused by residual heat in the material 19. The third ventilation structure blows downwards and covers the conveying area, allowing the cold air to precisely target the conveying material 19. The conveying structure 9 is horizontally positioned directly below the discharge space, and with a material-blocking gap 13 adapted to the maximum outer diameter of the material 19, it forces the material 19 to be conveyed in a single-layer, flat state. This ensures sufficient and uniform contact between the cold air and the material 19, effectively preventing moisture migration, localized dampness, and thermal stress damage caused by uneven cooling, thus improving the storage stability of the material 19. The collection port 17 of the material collection section 3 enables centralized reception of cooled material 19, ensuring orderly discharge and further improving production efficiency and the final quality of material 19.

[0030] In one embodiment, the third ventilation structure includes a plurality of third ventilation pipes 10, the vertical cross-section of the third ventilation pipe 10 is triangular, the third ventilation pipe 10 is fixed below the material distribution angle, the sharp corner of the third ventilation pipe 10 is in contact with the material distribution angle, and the lower part of the third ventilation pipe 10 is connected to the discharge section 2 to blow cold air onto the conveying structure 9.

[0031] The design of the sharp corner of the third ventilation structure in this embodiment, which is fixed to the material distribution corner, can adapt to the structural shape of the material distribution corner and improve the stability of the ventilation pipe installation. The triangular cross-section structure can guide and converge the cold air, making the cold air more concentrated and delivered downwards. Combined with the setting of the lower part of the third ventilation pipe 10 being connected to the discharge section 2, it can ensure that the cold air acts accurately and smoothly on the material 19 on the conveying structure 9, further optimizing the conveying path and coverage of the cold air, enhancing the uniformity of contact between the cold air and the single-layer flat material 19, making the cooling rate of each area of ​​the material 19 consistent, effectively improving the stability of the cooling effect, reducing the quality problems of the material 19 caused by insufficient local cooling or excessive cooling, and further ensuring the storage stability and final appearance of the material 19.

[0032] In this embodiment, the system further includes an air inlet pipe 4 and a return air pipe 5. The air inlet pipe 4 and the return air pipe 5 are respectively arranged on both sides of the drying and cooling integrated machine and are symmetrically arranged. The drying section 1 includes a material flow area 24, a first ventilation structure and a second ventilation structure. The first ventilation structure and the second ventilation structure are fixed in the material flow area 24. The first ventilation structure and the second ventilation structure are respectively arranged at different heights. The first ventilation structure and the second ventilation structure are staggered in both the horizontal and vertical directions. One end of the first ventilation structure is closed and the other end of the first ventilation structure is connected to the air inlet pipe 4. One end of the second ventilation structure is closed and the other end of the second ventilation structure is connected to the return air pipe 5.

[0033] As a further preferred embodiment, the first ventilation structure includes a plurality of first ventilation pipes 22, the vertical cross-section of the first ventilation pipe 22 being triangular, the tip of the first ventilation pipe 22 pointing upwards, one end of the first ventilation pipe 22 being closed, the other end of the first ventilation pipe 22 being connected to the air inlet pipe 4, and the bottom of the first ventilation pipe 22 being connected to the material flow area 24; the second ventilation structure includes a plurality of second ventilation pipes 23, the vertical cross-section of the second ventilation pipe 23 being triangular, the tip of the second ventilation pipe 23 pointing upwards, one end of the second ventilation pipe 23 being closed, the other end of the second ventilation pipe 23 being connected to the air return pipe 5, and the bottom of the first ventilation pipe 22 being connected to the material flow area 24.

[0034] The air inlet duct 4 and return air duct 5 are respectively located on both sides of the drying and cooling integrated machine and are symmetrically arranged, which can form a balanced airflow delivery and discharge foundation, ensuring the overall stability of airflow distribution within the drying section 1. The first and second ventilation structures of the drying section 1 further optimize the contact layout between airflow and material 19. The first ventilation duct 22 outputs hot air downwards, while the second ventilation duct 23 intakes air from below. This coordinated design avoids the formation of a fixed path for hot air, promoting sufficient mixing of hot air within the material flow zone 24, allowing the hot air to penetrate evenly into the deeper layers of the material 19, and completely eliminating localized drying dead zones. The hot air mixing effect combined with the reasonable ventilation duct design ensures uniform hot air distribution in all areas within the material flow zone 24, maintaining consistent drying levels across all parts of the material 19, and effectively guaranteeing the stability of drying quality.

[0035] In one embodiment, the system further includes a heating furnace 25, a circulation pipe 8, and a circulation fan 6. The circulation pipe 8 is located at the bottom of the drying and cooling integrated machine, and its two ends are connected to the air inlet pipe 4 and the air return pipe 5, respectively, forming a circulation loop. The circulation fan 6 is fixed inside the circulation pipe 8 and discharges air towards the end where the air inlet pipe 4 is located. The heating furnace 25 is connected to the air inlet pipe 4. The circulation loop, in conjunction with the circulation fan 6 discharging air directionally towards the air inlet pipe 4, drives the hot air circulation, improving heat utilization. The heating furnace 25, connected to the air inlet pipe 4, can continuously provide a stable heat source for the incoming air, ensuring that the drying temperature meets the standards. This structure, in conjunction with the existing ventilation system, makes the hot air temperature and airflow in the drying section 1 more stable, further improving drying efficiency and quality consistency, while reducing energy consumption.

[0036] In a further preferred embodiment, the device also includes a dehumidifier 7, which is fixed to the return air duct 5 and exhausts air towards the outside of the drying and cooling integrated machine.

[0037] In one embodiment, the conveying structure 9 includes a conveyor belt and a driving device 16. The conveyor belt includes a driving end 20 and a driven end 18. The output end of the driving device 16 is connected to the driving end 20 to drive the conveyor belt to move horizontally toward the collection port 17.

[0038] In this embodiment, the conveying structure 9 includes a first conveying component 14 and a second conveying component 15. Both the first conveying component 14 and the second conveying component 15 include the conveyor belt, and their conveying directions are consistent. The second conveying component 15 is disposed above the first conveying component 14. The material dropping end of the second conveying component 15 protrudes towards the collection port 17 relative to the material dropping end of the first conveying component 14. The first conveying component 14 and the second conveying component 15 correspond one-to-one with the material guiding structures in different columns along the lateral to inward direction of the drying and cooling integrated machine, thereby realizing multi-layer synchronous material discharge.

[0039] As a further preferred embodiment, the conveyor belt drive end 20 of the first transmission component is connected to the drive device 16, and the conveyor belt drive end 20 of the second transmission component is connected to the conveyor belt drive end 20 of the first transmission component, so as to realize the synchronous drive of the first transmission component and the second transmission component.

[0040] In this embodiment, the conveying structure 9 adopts a design that combines a conveyor belt with a drive device 16. The output end of the drive device 16 is connected to the drive end 20 of the conveyor belt. The drive device 16 is preferably a drive motor, which can drive the conveyor belt to move steadily in the horizontal direction toward the collection port 17, ensuring a smooth conveying process, avoiding damage to the single-layer flat state of the material 19, ensuring full contact between the cold air and the material 19, and realizing the directional conveying of the material 19 to the collection port 17, smoothly connecting the collection function of the collection section 3.

[0041] By setting up a first conveyor component 14 and a second conveyor component 15 distributed vertically, both equipped with conveyor belts and maintaining the same conveying direction, and in conjunction with a layout that corresponds one-to-one with different column material guiding structures along the side to the inside of the drying and cooling integrated machine, multi-layer synchronous discharge and cooling can be achieved, effectively improving the material processing efficiency 19 per unit time. The design of the material discharge end of the second conveyor component 15 protruding towards the collection port 17 can avoid mutual interference between the upper and lower layers of material 19 during the discharge process, ensuring that each layer of material 19 can be accurately guided to the collection port 17, while maintaining the single-layer flat state of each layer of material 19, ensuring that the cooling uniformity is not affected.

[0042] The first conveying component 14 and the second conveying component 15 adopt a synchronous drive design. Power is supplied by the same drive device 16 through the connection between the drive end 20 of the second conveying component 15 and the drive end 20 of the first conveying component 14. This ensures that the conveying speeds of the two conveying components are completely consistent, guaranteeing a matching conveying rhythm between the upper and lower layers of materials 19. This further stabilizes the single-layer flat laying state of each layer of materials 19, preventing material accumulation or displacement due to speed differences. This design eliminates the need for additional independent drive components, simplifying the structural layout, reducing equipment costs, and ensuring the stability and reliability of multi-layer synchronous material discharge and cooling.

[0043] In one embodiment, the collection port 17 is located in the central region of the material guiding structure. The first transmission component and the second transmission component are both configured as two sets. The two sets of first transmission components are symmetrically distributed with respect to the collection port 17, and the two sets of second transmission components are symmetrically distributed with respect to the collection port 17. The material dropping end of the first transmission component and the material dropping end of the second transmission component both face the collection port 17.

[0044] In this embodiment, the drive end 20 and the material discharge end are located at the same end. The collection port 17 is located in the central area of ​​the material guiding structure. Combined with the symmetrical arrangement of two sets of first conveying components 14 and second conveying components 15 relative to the collection port 17, the overall force on the equipment is balanced, improving the stability of the operation. The material discharge ends of both sets of conveying components face the collection port 17, guiding the materials 19 from both sides and the upper and lower layers to converge and fall towards the central collection port 17, avoiding spillage and loss during material transport and ensuring orderly discharge. This symmetrical layout, in conjunction with the multi-layer synchronous discharge structure, further improves the material processing efficiency while ensuring that the cooling uniformity of the materials 19 on each layer and side is not affected, smoothly connecting the material collection function and improving the continuity and reliability of the overall production process.

[0045] In one embodiment, the discharge space includes an inlet and an outlet. The inlet is located above the outlet. The horizontal cross-sectional dimension of the outlet is smaller than that of the inlet, forming a Y-shaped cross-section. The outlet extends vertically downward, and the centerline of the outlet is perpendicular to the upper surface of the conveying structure 9.

[0046] In one embodiment, the material guiding structure further includes an adjustment mechanism, which comprises a material blocking plate 12 for adjusting the material blocking gap 13 and a sliding guide rail. The sliding guide rail is fixed vertically to the side wall of the discharge port. The material blocking plate 12 is connected to the sliding guide rail, and the lifting motor is connected to the material blocking plate 12 to control the material blocking plate 12 to move up and down along the sliding guide rail. In this embodiment, the material blocking plate 12 located on the side opposite to the conveying direction descends to the surface of the conveyor belt to prevent the material 19 from being squeezed and leaking out from the opposite direction.

[0047] The adjusting mechanism of the material guiding structure provides stable lifting guidance for the material blocking plate 12 through a sliding guide rail vertically fixed to the side wall of the discharge port. The lifting motor is connected to the material blocking plate 12, which can precisely control the lifting and lowering of the material blocking plate 12 along the guide rail, realizing flexible adjustment of the material blocking gap 13. This design can adapt to materials 19 with different particle sizes, ensuring that all types of materials 19 can maintain a suitable single-layer flat state, avoiding uneven spreading or excessive gaps and leakage problems caused by changes in the particle size of the material 19, further improving the versatility and adaptability of the equipment. At the same time, the precise adjustment function ensures the stability of the cooling effect, and together with the discharge space and conveying structure 9, it improves the reliability of the overall process.

[0048] Optionally, the drying and cooling integrated machine also includes casters 21, which are connected to the bottom of the drying and cooling integrated machine via a rotating shaft to support the entire device, thereby facilitating the movement of the drying and cooling integrated machine.

[0049] This invention also provides a control method for an integrated drying and cooling machine, applied to the integrated drying and cooling machine described above, comprising the following steps: S1. Obtain the real-time air pressure difference between the drying section and the discharge section, the real-time drying efficiency of the material in the drying section, and the real-time cooling efficiency of the discharge section. S2. Obtain the target air pressure difference threshold between the drying section and the discharge section, and determine whether the real-time air pressure difference is greater than or less than the target air pressure difference threshold; if the real-time air pressure difference is greater than the target air pressure difference threshold, proceed to step S3. S3. Obtain the qualified threshold for drying efficiency and the qualified threshold for cooling efficiency, determine whether the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency, and determine whether the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency. S4. If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is kept constant, and the conveying speed of the conveying structure is kept constant. The control process ends and returns to step S1.

[0050] In this embodiment, step S1 specifically includes the following steps: S11. Obtain the internal air pressure of the drying section and the internal air pressure of the discharge section, and determine the real-time air pressure difference between the drying section and the discharge section based on the internal air pressure of the drying section and the internal air pressure of the discharge section. S12. Obtain the material feed humidity, material discharge humidity and preset drying time of the drying section, and determine the real-time drying efficiency of the material in the drying section based on the material feed humidity, material discharge humidity and preset drying time of the drying section. S13. Obtain the material feed temperature and material discharge temperature of the discharge section, and determine the real-time cooling efficiency of the discharge section based on the material feed temperature and material discharge temperature of the discharge section.

[0051] As a further preferred embodiment, step S4 further includes the following steps: If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is kept constant, the conveying speed of the conveying structure is reduced by the preset speed increment, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveying speed of the conveying structure remains unchanged, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveyor structure is reduced by the preset speed increment, and the process returns to step S2.

[0052] As a further preferred embodiment, if the real-time pressure difference is less than the target pressure difference threshold in step S2, then step S4 further includes the following steps: If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is reduced by the preset air volume, the conveying speed of the conveying structure is kept constant, and the process returns to step S2. Alternatively, if the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is reduced by a preset air volume, the conveying speed of the conveying structure is reduced by a preset speed increment, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveying speed of the conveying structure remains unchanged, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveyor structure is reduced by the preset speed increment, and the process returns to step S2.

[0053] The control method described in this embodiment ensures that, while maintaining drying and cooling efficiency, cold air in the discharge section does not flow back into the drying section, thus preventing adverse effects on material drying.

[0054] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A drying and cooling integrated machine, characterized in that, It includes a drying section, a discharge section and a collection section arranged vertically from top to bottom. The drying section is equipped with hot air to dry the material, the discharge section is equipped with cold air to cool the material, and the collection section is fixed below the discharge section and is equipped with a collection port to receive the material. The discharge section includes a third ventilation structure, multiple material guiding structures, and a conveying structure. The multiple material guiding structures are arranged side by side along the conveying direction of the conveying structure. The sides of adjacent material guiding structures are sequentially sealed and connected, forming a material dividing angle. The interior of each material guiding structure encloses a discharge space. The third ventilation structure is located below the material dividing angle, and its airflow direction is downward, covering the conveying area of ​​the conveying structure. The conveying structure is horizontally located directly below the discharge space. A material blocking gap is provided between the bottom of the discharge space and the upper surface of the conveying structure. The width of the material blocking gap is consistent with the maximum outer diameter of the material, so that the material is laid flat in a single layer on the conveying structure.

2. The drying and cooling integrated machine according to claim 1, characterized in that, The third ventilation structure includes multiple third ventilation pipes. The vertical cross-section of each third ventilation pipe is triangular. Each third ventilation pipe is fixed below the material distribution angle. The pointed corner of the third ventilation pipe is in contact with the material distribution angle. The lower part of the third ventilation pipe is connected to the internal space of the discharge section to blow cold air into the conveying structure.

3. The drying and cooling integrated machine according to claim 1, characterized in that, It also includes an air inlet pipe and an air return pipe, which are respectively arranged on both sides of the drying and cooling integrated machine and are symmetrically arranged. The drying section includes a material flow area, a first ventilation structure and a second ventilation structure. The first ventilation structure and the second ventilation structure are fixed in the material flow area. The first ventilation structure and the second ventilation structure are respectively set at different heights. The first ventilation structure and the second ventilation structure are staggered in both the horizontal and vertical directions. One end of the first ventilation structure is closed and the other end of the first ventilation structure is connected to the air inlet pipe. One end of the second ventilation structure is closed and the other end of the second ventilation structure is connected to the air return pipe.

4. The drying and cooling integrated machine according to claim 3, characterized in that, The first ventilation structure includes multiple first ventilation pipes, each with a triangular vertical cross-section, the tip of the first ventilation pipe pointing upwards, one end of the first ventilation pipe being closed, the other end of the first ventilation pipe being connected to the air inlet pipe, and the bottom of the first ventilation pipe being connected to the material flow area; the second ventilation structure includes multiple second ventilation pipes, each with a triangular vertical cross-section, the tip of the second ventilation pipe pointing upwards, one end of the second ventilation pipe being closed, the other end of the second ventilation pipe being connected to the air return pipe, and the bottom of the first ventilation pipe being connected to the material flow area.

5. The drying and cooling integrated machine according to claim 4, characterized in that, It also includes a heating furnace, a circulation pipe and a circulation fan. The circulation pipe is located at the bottom of the drying and cooling integrated machine. The two ends of the circulation pipe are connected to the air inlet pipe and the air return pipe respectively to form a circulation loop. The circulation fan is fixed inside the circulation pipe and blows air towards the end where the air inlet pipe is located. The heating furnace is connected to the air inlet pipe.

6. The drying and cooling integrated machine according to claim 5, characterized in that, It also includes a dehumidifying fan, which is fixed to the return air duct and the dehumidifying fan is directed to the outside of the drying and cooling integrated machine.

7. A control method for an integrated drying and cooling machine, applied to the integrated drying and cooling machine as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Obtain the real-time air pressure difference between the drying section and the discharge section, the real-time drying efficiency of the material in the drying section, and the real-time cooling efficiency of the discharge section. S2. Obtain the target air pressure difference threshold between the drying section and the discharge section, and determine whether the real-time air pressure difference is greater than or less than the target air pressure difference threshold. If the real-time air pressure difference is greater than the target air pressure difference threshold, proceed to step S3; S3. Obtain the qualified threshold for drying efficiency and the qualified threshold for cooling efficiency, determine whether the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency, and determine whether the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency. S4. If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is kept constant, and the conveying speed of the conveying structure is kept constant. The control process ends and returns to step S1.

8. The control method for the integrated drying and cooling machine according to claim 7, characterized in that, S1 specifically includes the following steps: S11. Obtain the internal air pressure of the drying section and the internal air pressure of the discharge section, and determine the real-time air pressure difference between the drying section and the discharge section based on the internal air pressure of the drying section and the internal air pressure of the discharge section. S12. Obtain the material feed humidity, material discharge humidity and preset drying time of the drying section, and determine the real-time drying efficiency of the material in the drying section based on the material feed humidity, material discharge humidity and preset drying time of the drying section. S13. Obtain the material feed temperature and material discharge temperature of the discharge section, and determine the real-time cooling efficiency of the discharge section based on the material feed temperature and material discharge temperature of the discharge section.

9. The control method for the integrated drying and cooling machine according to claim 7, characterized in that, S4 also includes the following steps: If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is kept constant, the conveying speed of the conveying structure is reduced by the preset speed increment, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveying speed of the conveying structure remains unchanged, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveyor structure is reduced by the preset speed increment, and the process returns to step S2.

10. The control method for the integrated drying and cooling machine according to claim 7, characterized in that, If the real-time pressure difference in step S2 is less than the target pressure difference threshold, then step S4 further includes the following steps: If the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is reduced by the preset air volume, the conveying speed of the conveying structure is kept constant, and the process returns to step S2. Alternatively, if the real-time drying efficiency is greater than or equal to the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is kept constant, the cold air supply of the discharge section is reduced by a preset air volume, the conveying speed of the conveying structure is reduced by a preset speed increment, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is greater than or equal to the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveying speed of the conveying structure remains unchanged, and the process returns to step S2. Alternatively, if the real-time drying efficiency is less than the qualified threshold for drying efficiency and the real-time cooling efficiency is less than the qualified threshold for cooling efficiency, then the hot air supply of the drying section is increased by the preset air volume, the cold air supply of the discharge section remains unchanged, the conveyor structure is reduced by the preset speed increment, and the process returns to step S2.

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