Constant-temperature uniform hot air oil tea fruit drying equipment

Abstract

The utility model discloses a kind of constant temperature uniform hot air oil tea fruit drying equipment, it is related to oil tea fruit drying technical field, including heating device, drying device is connected with heating device, the circulation flow of hot air is formed, drying device includes fixed shell, fixed shell top and the air inlet of heating device are connected, drying chamber is located in fixed shell, object net is located in drying chamber bottom, air guide structure is located between fixed shell inner bottom wall and object net, and is connected with the air outlet of heating device;This kind of constant temperature uniform hot air oil tea fruit drying equipment can realize hot air uniform coverage in drying chamber, improve oil tea fruit drying moisture content consistency, to improve oil tea fruit drying quality, improve yield, drying efficiency, shorten drying time, reduce energy consumption cost.

Description

Technical Field

[0001] This utility model relates to the field of camellia fruit drying technology, specifically a constant temperature and uniform hot air drying device for camellia fruit. Background Technology

[0002] After harvesting, camellia fruits need to be dried to remove moisture, ensuring the quality of the camellia oil in subsequent pressing and refining processes. Low-temperature hot air drying has become the mainstream drying method because it can prevent high-temperature deterioration of the camellia fruits, such as oil oxidation.

[0003] However, the uneven distribution of hot air in existing constant-temperature and uniform hot air drying equipment for camellia fruit results in large temperature differences within the drying chamber. Some camellia fruits become moldy and spoiled due to insufficient drying, while others suffer from oil loss due to over-drying. This leads to unstable drying quality, low yield, and long drying time, increasing energy costs. Utility Model Content

[0004] The purpose of this invention is to provide a constant temperature and uniform hot air drying equipment for camellia fruit. This equipment can achieve uniform hot air coverage in the drying chamber, improve the consistency of moisture content in the dried camellia fruit, thereby improving the quality of dried camellia fruit, increasing the yield and drying efficiency, shortening the drying time, and reducing energy consumption costs.

[0005] The above-mentioned optimized device of this utility model is achieved through the following technical solution: a constant temperature and uniform hot air drying equipment for camellia oil fruit, including a heating device; A drying device is connected to a heating device to form a circulating flow of hot air. The drying device includes a fixed shell, the top of which is connected to the air inlet of the heating device. A drying chamber, wherein the drying chamber is disposed within the fixed shell; A storage net is provided at the bottom of the drying chamber; An air guide structure is provided between the bottom wall of the fixed shell and the storage net, and is connected to the air outlet of the heating device.

[0006] In some embodiments, the fixing shell includes a base, which is disposed at the bottom of the air guide structure; The enclosure is sealed onto the air guide structure; An air collecting hood assembly is sealed on the top of the enclosure and connected to the air inlet of the heating device.

[0007] In some embodiments, the air collecting hood assembly includes a plurality of air collecting hoods that are sealed together, with the middle portion of the air collecting hood connected to the air inlet of the heating device.

[0008] In some embodiments, the cross-section of the air collecting hood is an isosceles trapezoid.

[0009] In some embodiments, the fixed housing further includes a second filter plate, which is sealed to the top of the enclosure.

[0010] In some embodiments, the air guiding structure includes an air guiding block, which is disposed on the base; An air guide trough is provided on the top of the air guide block, and the top of the air guide trough is provided with the storage net; An air guide nozzle is provided on one side of the air guide block and communicates with the air guide groove, and the air guide nozzle is connected to the air outlet of the heating device. An air guide assembly is disposed within the air guide groove.

[0011] In some embodiments, the air guide assembly includes multiple vertical plates, which are equally spaced within the air guide groove, and the length of the multiple vertical plates gradually increases from both ends of the air guide groove toward the middle. Multiple horizontal plates are symmetrically and evenly spaced at both ends of the air guide trough, and correspond one-to-one with multiple vertical plates. The connection between the vertical plates and the horizontal plates is rounded.

[0012] In some embodiments, the air guiding structure further includes a first filter plate, which is embedded in the air guide nozzle on the side near the air guide groove.

[0013] In summary, this utility model has the following beneficial effects: This constant-temperature uniform hot air drying equipment for camellia fruit achieves uniform coverage of hot air in the drying chamber through the rectification and diversion of the air guiding components in the air guide duct, thereby improving the consistency of the moisture content of the dried camellia fruit and thus improving the quality of the dried camellia fruit. At the same time, uniform hot air can accelerate the evaporation of moisture, thereby improving the yield, drying efficiency, shortening the drying time, and reducing energy consumption costs. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the structure of this utility model; Fig. 2 This is a cross-sectional schematic diagram of the connection between the drying device and the air guide structure of this utility model; Fig. 3 This is a schematic diagram of the air guide structure of this utility model.

[0015] In the diagram: 1. Heating device; 2. Fixed shell; 21. Base; 22. Enclosure; 23. Air collection hood assembly; 24. Second filter plate; 3. Drying chamber; 4. Storage net; 5. Air guiding structure; 51. Air guide block; 52. Air guide groove; 53. Air guide nozzle; 54. Vertical plate; 55. Horizontal plate; 56. First filter plate. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] refer to Figs. 1-3 A constant-temperature uniform hot air drying device for camellia oil fruit includes a heating device 1 and at least one drying device. The drying device is connected to the heating device 1, and the two work together precisely to achieve hot air circulation, ensuring that the camellia oil fruit is dried uniformly in a constant-temperature environment. The heating device 1 is the core component for hot air supply. The heating device 1 can be an electrically heated hot air furnace, which can output low-temperature hot air with a stable temperature. The temperature can be set according to actual conditions, and the outlet temperature can be 50-60℃. Its air outlet is connected to the air guide structure 5 of the drying device to deliver hot air to the drying device. The air inlet is connected to the top of the fixed shell 2 of the drying device, which can recover the hot air in the drying device, forming a hot air circulation path, reducing heat loss, and achieving energy-saving drying.

[0018] The drying device includes a fixed shell 2, a drying chamber 3, a storage net 4, and an air guide structure 5. The fixed shell 2 provides a closed environment for the drying operation, preventing hot air leakage and the entry of cold air from the outside. Its top is connected to the air inlet of the heating device 1, ensuring that hot air can flow smoothly back to the heating device 1 and maintain circulation stability. The drying chamber 3 is located inside the fixed shell 2 and is the direct space for placing and drying the camellia fruit. The internal temperature and air velocity are controlled collaboratively by the heating device 1 and the air guide structure 5 to ensure that the low-temperature drying requirements of the camellia fruit are met. The storage net 4 is assembled on the drying chamber. At the bottom of the drying chamber 3, a breathable stainless steel woven mesh is used. The stainless steel woven mesh is designed according to the size of the camellia fruit, which can stably support the camellia fruit without obstructing the upward flow of hot air. This ensures that the hot air can penetrate the pile of camellia fruit evenly and achieve all-round drying. The air guide structure 5 is installed between the bottom wall of the fixed shell 2 and the storage net 4, and is connected to the air outlet of the heating device 1. It can rectify and divert the hot air delivered by the heating device 1, so that it is evenly distributed and delivered upward to the drying chamber 3, avoiding the problem of uneven drying caused by direct hot air blowing.

[0019] In some embodiments, the fixed shell 2 includes a base 21, a enclosure 22, and an air collecting hood assembly 23. The base 21 is located at the bottom of the air guiding structure 5 and can be formed by welding steel plates. The base 21 provides stable support for components such as the air guiding structure 5 and the enclosure 22, preventing components from shifting due to vibration during equipment operation. The enclosure 22 is sealed on the air guiding structure 5 and can be made of insulated steel plates with an internal rock wool insulation layer. This effectively reduces heat exchange between the drying chamber 3 and the outside environment, maintaining a constant indoor temperature. It can be fixed to the top edge of the air guiding structure 5 by sealing welding, forming the side wall of the drying chamber 3. To prevent hot air leakage from the side walls and ensure the stability of hot air circulation, inlet and outlet ports can be opened on the side walls of the enclosure 22. The inlet and outlet ports can be equipped with sealing doors through sealing rings to facilitate the feeding and discharging of camellia fruit. This is existing technology and will not be described in detail here. The air collecting hood assembly 23 is sealed on the top of the enclosure 22 and connected to the air inlet of the heating device 1. The air collecting hood assembly 23 can be assembled on the top of the enclosure 22 by bolt sealing connection and can be sealed to the air inlet of the heating device 1 by flange sealing connection. It can efficiently collect the rising hot air in the drying chamber 3 and deliver it to the air inlet of the heating device 1 to ensure smooth hot air circulation.

[0020] In some embodiments, the air collecting hood assembly 23 includes multiple air collecting hoods that are sealed together. The number of air collecting hoods can be adapted to the size of the drying chamber 3. The multiple air collecting hoods can be integrally formed. The middle part of the air collecting hood can be connected to the air inlet of the heating device 1 through a collection pipe. The multiple air collecting hoods are evenly distributed on the top of the enclosure 22, which can collect hot air from different areas of the drying chamber 3 simultaneously, avoiding the problem of uneven air collection caused by a single air collecting hood, ensuring that the hot air in each area of ​​the drying chamber 3 can be returned in time, and maintaining the stability of the indoor wind speed.

[0021] In some embodiments, the cross-section of the air collecting hood is an isosceles trapezoid. The long side of the lower base of the isosceles trapezoid structure can increase the air collecting inlet area and increase the air volume collected per unit time; the short side of the upper base facilitates connection with the collection pipe, reduces the flow resistance of hot air in the air collecting hood, and allows hot air to enter the heating device 1 quickly and smoothly, avoiding the stagnation of hot air in the drying chamber 3 due to poor air collection.

[0022] In some embodiments, to prevent debris generated during the drying process of camellia fruit from entering the heating device 1 with the hot air, causing pipe blockage or equipment damage, a second filter plate 24 is added to the fixed shell 2. The second filter plate 24 can be a stainless steel filter screen with a mesh diameter of 2mm, which is fixed between the top of the enclosure 22 and the air collecting hood assembly 23 by bolt sealing. Hot air must be filtered by the filter screen before entering the air collecting hood assembly 23. The stainless steel filter screen has good air permeability, does not affect the flow of hot air, and can effectively intercept debris, ensuring that the hot air entering the heating device 1 is clean and free of impurities, thus extending the service life of the equipment.

[0023] In some embodiments, the air guiding structure 5 includes an air guiding block 51, an air guiding groove 52, an air guiding nozzle 53, and an air guiding assembly. The air guiding block 51 can be injection molded from high-temperature resistant PPO plastic, and has an overall rectangular structure. It is set on the base 21 and can be fixed by bolts. The air guiding groove 52 is opened on the top of the air guiding block 51, which can provide a fixed channel for the flow of hot air, avoid the disorderly diffusion of hot air at the bottom of the air guiding structure 5, and ensure that the hot air flows along a preset path. The top of the air guiding groove 52 is attached to the bottom of the storage net 4. When the hot air flows in the air guiding groove 52, it can be guided by the groove wall to achieve directional flow, laying the foundation for subsequent rectification and diversion. The air guiding nozzle 53 can be integrally formed on one side of the air guiding block 51. Its inlet end can be sealed to the air outlet of the heating device 1 through a flange, and its outlet end is connected to the air guiding groove 52. The air guiding assembly is set inside the air guiding groove 52, which can divert the hot air and adjust the resistance, improve the consistency of the hot air flow rate in each area of ​​the air guiding groove 52, and thus achieve uniform air distribution in the drying chamber 3.

[0024] In some embodiments, the air guiding assembly includes multiple vertical plates 54 and multiple horizontal plates 55. The vertical plates 54 can be cut from stainless steel plates. The multiple vertical plates 54 are vertically fixed to the bottom of the air guiding channel 52 at equal intervals, and the length of the vertical plates 54 gradually increases from both ends of the air guiding channel 52 towards the middle. Since the hot air velocity is high near the air guide nozzle 53 and low far from the air guide nozzle 53, the length gradient design makes the vertical plates longer in the high-velocity area and shorter in the low-velocity area, thereby balancing the hot air velocity in each cross section of the air guiding channel 52. It can be understood that the hot air entering the air guiding channel 52 from the air guide nozzle 53 has the highest velocity near the inlet and gradually decreases along the extension direction of the air guiding channel, forming a non-uniform velocity field. To solve this problem, in this embodiment, the length of the multiple vertical plates 54 gradually increases from both ends of the air guiding channel 52 towards the middle. Through the above structural design, the longest longitudinal plate 54 is set in the middle region where the flow velocity is highest to generate the greatest flow resistance; while at the two ends where the flow velocity is lower, especially at the end far from the air guide nozzle 53, a shorter longitudinal plate 54 is set to generate less resistance. By applying differentiated resistance to different regions, some of the high-speed airflow is forcibly guided to split to both sides to compensate for the velocity loss at the far end, thereby making the hot air velocity on the entire cross-section of the air guide duct 52 tend to be uniform, and achieving a uniform distribution of the upward-blown hot air.

[0025] The horizontal plates 55 can be made of the same stainless steel as the vertical plates 54. Multiple horizontal plates are fixed at both ends of the air guide trough 52 in a symmetrical manner with equal spacing, and are connected one-to-one with the vertical plates 54. They can be welded or integrally formed, and the connection between the vertical plates 54 and the horizontal plates 55 has a rounded corner of R5mm. Of course, the specific number and spacing of the horizontal plates 55 and the vertical plates 54 can be adapted to the overall size of the drying device, which is within the scope of conventional experimental selection for those skilled in the art.

[0026] The horizontal plate 55 can further divide the hot air at both ends of the air guide slot 52, preventing the hot air from forming vortices at both ends. Vortices can cause a sudden drop in local wind speed, affecting the uniformity of drying. The rounded corner design can reduce the flow resistance of hot air at the connection point, prevent turbulence, and ensure that the hot air flows smoothly along the air guide slot 52.

[0027] In some embodiments, the air guiding structure 5 further includes a first filter plate 56, which is embedded in the air guide nozzle 53 on the side near the air guide groove 52. The first filter plate 56 can be a stainless steel filter with a mesh diameter of 1mm, and is installed in an embedded and sealed manner on the side of the air guide nozzle 53 near the air guide groove 52. The edge of the filter can be fitted to the inner wall of the air guide nozzle 53 through a rubber sealing ring. Before the hot air enters the air guide groove 52, it must first pass through the first filter plate 56 to filter out dust and impurities, ensuring that the hot air entering the air guide groove 52 is clean. This avoids the accumulation of impurities on the vertical and horizontal plates inside the air guide groove 52, which affects the rectification effect, and also prevents impurities from contaminating the camellia fruit, thus ensuring the drying quality.

[0028] The specific working principle is as follows: First, according to the requirements of the camellia fruit drying process, the outlet air temperature of the heating device 1 is set to a low temperature range of 50-60℃ to bring the equipment into a constant temperature state. At the same time, the camellia fruits to be dried are evenly spread on the storage net 4, and the sealing door of the fixed shell 2 (not shown in the figure) is closed to form a closed drying environment.

[0029] The hot air delivered from the outlet of the heating device 1 first enters the air guide nozzle 53 of the air guide structure 5. During this process, the hot air needs to pass through the first filter plate 56 built into the air guide nozzle 53 to intercept dust, tiny impurities and other pollutants in the air.

[0030] The filtered clean hot air enters the air guide trough 52 at the top of the air guide block 51 through the outlet end of the air guide nozzle 53. The hot air entering the air guide trough 52 needs to be rectified and divided by the air guide assembly. After rectification and division, the hot air permeates evenly upward from the top of the air guide trough 52, passes through the storage net 4 and enters the drying chamber 3, achieving uniform air distribution. Under the continuous action of uniform hot air, the surface moisture of the camellia fruit placed on the storage net 4 gradually evaporates. Since the hot air penetrates the camellia fruit pile evenly from the bottom up, each camellia fruit in the pile can come into contact with hot air of stable temperature and wind speed, achieving all-round and synchronous drying, ensuring the consistency of drying quality of the same batch of camellia fruit.

[0031] Hot air carrying the evaporated moisture from the camellia fruit flows upward along the drying chamber 3 under the negative pressure of the air inlet of the heating device 1 and enters the top air collecting hood group 23. Before entering the air collecting hood, the hot air needs to pass through the second filter plate 24 to intercept impurities such as fruit peel fragments and fruit pulp fibers generated during the drying process of the camellia fruit. This prevents impurities from entering the pipes or internal components of the heating device 1 with the hot air, avoids pipe blockage or equipment wear, and extends the service life of the whole machine.

[0032] The hot air, filtered by the second filter plate 24, enters the air inlet of the heating device 1 through the collection pipe, completing the hot air circulation.

[0033] Set the drying time according to the required moisture content of the camellia fruit. After drying, turn off the heating device 1, open the sealed door, and take out the camellia fruit from the storage net 4.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A constant temperature and uniform hot air drying equipment for camellia oil fruit, comprising a heating device (1); A drying device, wherein the drying device is connected to the heating device (1) to form a circulating flow of hot air, characterized in that: The drying device includes a fixed shell (2), the top of which is connected to the air inlet of the heating device (1); Drying chamber (3), wherein the drying chamber (3) is disposed within the fixed shell (2); A storage net (4) is provided at the bottom of the drying chamber (3); Air guide structure (5), the air guide structure (5) is located between the bottom wall of the fixed shell (2) and the storage net (4), and is connected to the air outlet of the heating device (1); The fixed shell (2) includes a base (21), which is located at the bottom of the air guide structure (5); Enclosure (22), the enclosure (22) is sealed on the air guide structure (5); The air collecting hood assembly (23) is sealed on the top of the enclosure (22) and connected to the air inlet of the heating device (1); The air guiding structure (5) includes an air guiding block (51), which is disposed on the base (21); Air guide trough (52), the air guide trough (52) is located on the top of the air guide block (51), and the top of the air guide trough (52) is provided with the storage net (4); Air guide nozzle (53), the air guide nozzle (53) is located on one side of the air guide block (51) and communicates with the air guide groove (52), and the air guide nozzle (53) is connected to the air outlet of the heating device (1); An air guide assembly is disposed within the air guide groove (52).

2. The constant temperature and uniform hot air drying equipment for camellia fruit according to claim 1, characterized in that: The air collecting hood assembly (23) includes multiple air collecting hoods that are sealed together, and the middle part of the air collecting hood is connected to the air inlet of the heating device (1).

3. The constant temperature and uniform hot air drying equipment for camellia fruit according to claim 2, characterized in that: The cross-section of the air collecting hood is an isosceles trapezoid.

4. The constant temperature and uniform hot air drying equipment for camellia fruit according to claim 1, characterized in that: The fixed shell (2) also includes a second filter plate (24), which is sealed on the top of the enclosure (22).

5. The constant temperature and uniform hot air drying equipment for camellia fruit according to claim 4, characterized in that: The air guide assembly includes multiple vertical plates (54), which are equally spaced within the air guide groove (52), and the length of the multiple vertical plates (54) gradually increases from both ends of the air guide groove (52) towards the middle. Multiple horizontal plates (55) are symmetrically and evenly spaced at both ends of the air guide trough (52) and correspond one-to-one with multiple vertical plates (54). The connection between the vertical plate (54) and the horizontal plate (55) is rounded.

6. The constant temperature and uniform hot air drying equipment for camellia fruit according to claim 4, characterized in that: The air guide structure (5) also includes a first filter plate (56), which is embedded in the air guide nozzle (53) on the side near the air guide groove (52).

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