Tea withering ventilation device

Abstract

The utility model provides a tea withering ventilation device, which relates to the technical field of tea processing devices, and comprises a frame body, a plurality of flow equalizing boxes are fixedly arranged on the frame body, a first flow equalizing layer and a second flow equalizing layer are arranged in each flow equalizing box in a vertically separated manner, and an air conveying mechanism is communicated with one side of each first flow equalizing layer and is used for conveying air into the first flow equalizing layer; a first flow equalizing layer and a second flow equalizing layer are arranged in the frame body, the first flow equalizing layer and the second flow equalizing layer are communicated with each other, a plurality of air outlet holes are evenly formed in the bottom of the second flow equalizing layer, and a leaf bearing net is further slidably arranged on the portion, below the flow equalizing box, of the frame body. The air flow input by the air conveying mechanism is mixed and equalized twice in the flow equalizing box, and finally is uniformly blown out downwards from the air outlet holes, so that tea leaves at different positions of each layer or the same layer of leaf bearing net can be covered by the uniformly distributed air flow, and the withering degree difference caused by different distances from an air source is remarkably eliminated; and the withering uniformity and quality stability of the same batch of tea leaves are greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of tea processing equipment, and in particular to a tea withering ventilation device. Background Technology

[0002] Withering is a crucial initial processing step in tea making. Its core lies in controlling the appropriate loss of moisture from fresh leaves and accompanying certain biochemical changes to lay the foundation for subsequent processes. Specifically, the freshly picked tender tea leaves are evenly spread on withering equipment. Under suitable temperature, humidity, and air circulation conditions, the moisture in the intercellular spaces of the leaves evaporates naturally. At the same time, a slow enzymatic oxidation reaction occurs inside the leaves, causing the leaf texture to gradually soften, increase its toughness, reduce the grassy smell, and initially form aroma substances. This process is crucial to the formation of the final quality of the tea. Among these, controlling the ambient temperature and humidity and ensuring uniform air circulation to promote effective moisture evaporation and uniform biochemical reactions are the core technologies.

[0003] Currently, in large-scale production, withering troughs combined with bottom ventilation systems are widely used for forced ventilation to improve efficiency and controllability. However, although traditional withering troughs can achieve basic airflow exchange, the single-layer spreading method requires a large amount of production space, resulting in limited processing capacity per unit area. While multi-layer three-dimensional structures can improve space utilization, the air source is generally located on the side. When the airflow generated by the air source passes through different layers of the withering rack or different areas of the same layer, due to differences in flow paths and the resistance of the tea leaves themselves, it is very easy to cause obvious and difficult-to-eliminate unevenness in temperature and humidity distribution between layers and different positions within the same layer. Specifically, due to the difference in distance from the air source, there is a significant attenuation effect from near to far. Tea leaves close to the air source may lose water and become brittle too quickly due to direct airflow, while tea leaves far from the air source may not wither properly due to weakened airflow and accumulated humidity, or even develop a musty taste. This difference in withering degree caused by spatial location affects the stability and uniformity of the quality of the same batch of tea. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a tea withering ventilation device, which solves the problem that the multi-layer withering structure in the existing technology is prone to differences in the degree of withering due to different distances from the air source, which affects the stability and uniformity of the quality of the same batch of tea.

[0005] According to an embodiment of this utility model, a tea withering ventilation device includes a frame, on which a plurality of flow equalization boxes are fixedly installed. A first flow equalization layer and a second flow equalization layer are arranged vertically and vertically within the flow equalization boxes. An air conveying mechanism is connected to one side of the first flow equalization layer for conveying air into the first flow equalization layer. The first flow equalization layer and the second flow equalization layer are interconnected. A plurality of air outlet holes are evenly arranged at the bottom of the second flow equalization layer. A leaf-receiving net is also slidably installed on the frame below the flow equalization boxes.

[0006] The technical principle of this utility model is as follows: the tender tea leaves are evenly distributed in the leaf-receiving net, the leaf-receiving net is slid to the bottom of the flow equalization box, the air supply mechanism is turned on to supply air into the first flow equalization layer, the airflow is initially mixed and pressurized in the first flow equalization layer and then enters the second flow equalization layer. After the airflow is mixed and pressurized a second time, it is evenly blown out from the air outlet at the bottom of the second flow equalization layer, thereby ventilating and withering the tender tea leaves located at the bottom of the flow equalization box.

[0007] Furthermore, the air supply mechanism includes a fan and an air supply pipe, one end of which is connected to the first flow equalization layer, and the other end of which is connected to the output end of the fan.

[0008] Furthermore, the air supply mechanism also includes a plurality of air supply branch pipes, which are fixed at equal intervals and connected to each other on the side wall of the first flow equalization layer, and the outer ends of the air supply branch pipes are all connected to the air supply pipe.

[0009] Furthermore, a partition is fixedly provided between the first flow equalization layer and the second flow equalization layer, and the partition is provided with a plurality of connecting holes.

[0010] Furthermore, the diameter of the connecting hole gradually decreases from one side of the air duct towards the distance.

[0011] Furthermore, a connecting frame is fixedly installed around the leaf support mesh, and a handle is fixedly installed on one side of the connecting frame.

[0012] Furthermore, the frame is provided with a pair of sliding grooves opposite each other below the flow equalization box, the sliding grooves allowing the two sides of the connecting frame to be embedded and slide relative to each other.

[0013] Furthermore, the frame is provided with a locking member on one side of the sliding groove. The locking member includes a rotatable stop bar that can be rotated to block the groove opening outside the sliding groove.

[0014] Furthermore, the top of the flow equalization box is set to be inclined.

[0015] Furthermore, the frame is equipped with sliding wheels at the four corners of its bottom.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By using multiple flow distribution boxes fixed on the frame, the vertical distribution can effectively utilize the production space and increase the processing capacity per unit area.

[0018] 2. By setting up a first and second flow equalization layer that are separated and interconnected in the flow equalization box, the airflow input by the air conveying mechanism is mixed and pressurized twice in the flow equalization box, and finally blown out evenly downward from the air outlet. This ensures that each layer of leaf-bearing net and the tea leaves in different positions within the same leaf-bearing net are covered by airflow with a consistent flow rate and even distribution. This significantly eliminates the difference in withering degree caused by different distances from the air source, and greatly improves the uniformity of withering and quality stability of the same batch of tea leaves.

[0019] 3. By adopting an air intake method from the top of the air distribution box and a uniform downward air supply from the bottom, the traditional bottom ventilation method is avoided from being easily blocked by tea residue and debris and having cleaning dead corners. In addition, gravity helps the airflow penetrate the relatively still tea leaves downward, making it less likely to blow the tea leaves away. The airflow can directly contact the tender tea leaves without having to pass through the leaf-receiving net first, thus maintaining a uniform and stable airflow and a stable withering microenvironment. Furthermore, the sliding design of the leaf-receiving net facilitates the laying, inspection and removal of tea leaves, further improving the convenience of operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0021] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point B.

[0023] Figure 4 This is a top cross-sectional view of the flow equalization box according to an embodiment of the present invention.

[0024] Figure 5 This is a side cross-sectional view of the flow equalization box according to an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the leaf support mesh structure according to an embodiment of the present utility model.

[0026] In the above attached diagram: 1. Frame; 11. Support column; 12. Bearing frame; 121. Bolt; 13. Sliding groove; 14. Fixing plate; 15. Sliding wheel; 2. Flow equalization box; 21. First flow equalization layer; 22. Second flow equalization layer; 221. Air outlet; 23. Partition plate; 231. Connecting hole; 3. Air supply pipe; 31. Air supply branch pipe; 4. Leaf guard; 41. Connecting frame; 42. Handle; 5. Stop bar. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 As shown in the figure, this utility model embodiment proposes a tea withering ventilation device, including a frame 1. The frame 1 is composed of four supporting columns 11 and several load-bearing frames 12 that are equidistantly fixed to the inner side of the four supporting columns 11. The load-bearing frames 12 are formed by four load-bearing plates connected end to end in sequence. Several flow equalization boxes 2 are fixedly installed on the frame 1. Specifically, the flow equalization boxes 2 are fixedly connected to the upper part of the load-bearing frames 12 by bolts 121. The flow equalization box 2 is set as a closed, relatively flat box-shaped structure. Its shell can be made of lightweight, corrosion-resistant, and easy-to-clean materials, such as food-grade stainless steel plates or food-grade engineering plastic plates.

[0029] like Figure 1-2 and Figure 4-5 As shown, in this embodiment, the flow equalization box 2 is divided into a first flow equalization layer 21 and a second flow equalization layer 22. An air delivery mechanism is connected to one side of the first flow equalization layer 21 for supplying air into it. The first flow equalization layer 21 can decelerate and equalize the incoming airflow with high dynamic pressure, converting it into a relatively uniform static pressure distribution, thus achieving preliminary pressure equalization and reducing the direct impact of the air inlet position on the overall airflow uniformity. Specifically, the air delivery mechanism includes a fan (not shown in the figure) and an air delivery pipe 3. The fan is conventionally configured according to existing devices. The air delivery pipe 3 is fixedly connected to one side of the frame 1 via a fixing plate 14. One end of the air duct 3 is connected to the first flow equalization layer 21, and the other end of the air duct 3 is connected to the output end of the fan. The first flow equalization layer 21 and the second flow equalization layer 22 are interconnected. The airflow transmitted to the second flow equalization layer 22 will be further dispersed and equalized, laying the foundation for uniform and stable air output. Specifically, a partition 23 is fixedly provided between the first flow equalization layer 21 and the second flow equalization layer 22. The partition 23 is provided with a plurality of connecting holes 231. The connecting holes 231 are distributed to ensure that they cover the effective area and meet the requirement of uniform spatial distribution when the airflow enters the second flow equalization layer 22. A plurality of air outlet holes 221 are uniformly provided at the bottom of the second flow equalization layer 22 to maintain uniform and stable airflow output.

[0030] like Figure 1 , Figure 3 and Figure 6As shown, the frame 1 also has a leaf-collecting net 4 slidably arranged below the flow equalization box 2. Specifically, a connecting frame 41 is fixedly arranged around the leaf-collecting net 4. A handle 42 is fixedly arranged on one side of the connecting frame 41. The handle 42 facilitates the quick pulling out of the leaf-collecting net 4 for leaf laying, inspection, leaf turning or cleaning. A pair of sliding grooves 13 are arranged opposite each other at the lower part of the frame structure of the frame 1. The sliding grooves 13 allow the two sides of the connecting frame 41 to be inserted and slide relative to each other. When the connecting frame 41 slides to abut against the deep side of the frame structure, the leaf-collecting net 4 is exactly below the flow equalization box 2 with a certain space, so that it can receive more even airflow from above. The mesh surface of the leaf-collecting net 4 can be set as a high mesh count, high strength, corrosion-resistant metal wire mesh or food-grade synthetic fiber mesh to ensure that the mesh surface is flat and has sufficient load-bearing capacity and air permeability.

[0031] The technical principle of this utility model is as follows: the tender tea leaves are evenly distributed in the leaf-receiving net 4, the leaf-receiving net 4 is slid to the bottom of the flow equalization box 2, the fan is turned on to deliver air into the first flow equalization layer 21, the airflow is initially mixed and pressurized in the first flow equalization layer 21 and then enters the second flow equalization layer 22. After the airflow is mixed and pressurized again, it is evenly blown out from the air outlet 221 set at the bottom of the second flow equalization layer 22, thereby ventilating and withering the tender tea leaves located at the bottom of the flow equalization box 2.

[0032] This invention utilizes multiple flow equalization boxes 2 fixedly mounted on a frame 1, whose vertical distribution effectively utilizes production space and increases the processing capacity per unit area. By setting up a first flow equalization layer 21 and a second flow equalization layer 22 that are vertically separated but interconnected within the flow equalization box 2, the airflow input from the fan undergoes two mixing and pressure equalization processes within the flow equalization box 2, before finally being evenly blown downwards from the air outlet 221. This ensures that each layer of leaf-bearing mesh 4, as well as tea leaves at different positions within the same leaf-bearing mesh 4, are covered by a uniformly distributed airflow with consistent velocity. This significantly eliminates differences in withering degree caused by varying distances from the air source, greatly improving processing efficiency. This method ensures the uniformity and quality stability of withering tea leaves from the same batch. By adopting a method of air intake from the top of the equalization box 2 and uniform downward air delivery from the bottom, it avoids the problems of traditional bottom ventilation methods, such as the easy blockage of air ducts by tea residue and debris and the existence of cleaning dead corners. In addition, gravity helps the airflow penetrate downwards through the relatively still tea leaves, making it less likely to blow away the tea leaves. The airflow can directly contact the tender tea leaves without having to pass through the leaf support net 4 first, thus maintaining a uniform and stable airflow and a stable withering microenvironment. Furthermore, the sliding design of the leaf support net 4 facilitates the laying, inspection, and removal of tea leaves, further improving the convenience of operation.

[0033] like Figure 2 and Figure 4-5As shown, in another embodiment, the air supply mechanism further includes a plurality of air supply branch pipes 31, which are fixed at equal intervals and connected to each other on the side wall of the first flow equalization layer 21. The outer ends of the air supply branch pipes 31 are all connected to the air supply pipe 3. Based on the above improvement, the airflow input in the air supply pipe 3 will be initially dispersed by the air supply branch pipes 31 before entering the first flow equalization layer 21. After entering the first flow equalization layer 21, it can cover the entire flow equalization space laterally with its width range to increase the pressure equalization effect of the first flow equalization layer 21.

[0034] like Figure 2 and Figure 4-5 As shown, in this embodiment, the diameter of the connecting hole 231 gradually decreases from one side of the air supply pipe 3 to the far side. Based on the above improvement, due to the airflow characteristics, when the airflow enters the first flow equalization layer 21, it will be blown to the far side (compared to the air supply branch pipe 31). Since the diameter of the connecting hole 231 on the far side is smaller than that on the near side, the airflow that cannot pass through the connecting hole 231 on the far side will flow to the near side. By using the gradual design of the hole, the static pressure naturally decreases due to the increase in the flow distance of the airflow in the pressure equalization chamber, so that the airflow passing through the entire layer area can be as uniform and stable as possible, further increasing the pressure equalization effect of the first flow equalization layer 21.

[0035] like Figure 3 As shown, in another embodiment, the frame 1 is further provided with a locking member on one side of the sliding groove 13. The locking member includes a rotatable stop bar 5, which can be rotated to block the groove opening outside the sliding groove 13, thereby limiting the leaf support net 4 in the sliding groove 13 and preventing the leaf support net 4 from shifting during the withering process.

[0036] like Figure 1 and Figure 5 As shown, in another embodiment, the top of the flow equalization box 2 is further inclined. Based on the above improvement, the inclined top surface can make the leaf residue generated by the tea leaves in the upper leaf-collecting net 4 quickly gather to the lower side when it falls on the top, so as to facilitate collection and cleaning; at the same time, it can guide the water vapor and exhaust gas generated by the upper tea leaves to blow to the lower side without affecting the lower tea leaves.

[0037] like Figure 1 As shown, in another embodiment, further, the frame 1 is provided with sliding wheels 15 at the four corners of its bottom. The sliding wheels 15 facilitate the movement of the device and increase its mobility. The sliding wheels 15 also need to be provided with a locking mechanism. Those skilled in the art can set them according to conventional methods, and will not be described in detail here.

[0038] Finally, it should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A ventilation device for tea withering, characterized in that, The system includes a frame (1), on which several flow equalization boxes (2) are fixedly installed. The flow equalization boxes (2) are divided into a first flow equalization layer (21) and a second flow equalization layer (22) in the upper and lower parts. An air supply mechanism is connected to one side of the first flow equalization layer (21) for supplying air into the first flow equalization layer (21). The first flow equalization layer (21) and the second flow equalization layer (22) are connected to each other. Several air outlet holes (221) are evenly arranged at the bottom of the second flow equalization layer (22). A leaf support net (4) is also slidably installed below the flow equalization boxes (2) on the frame (1).

2. The tea withering ventilation device as described in claim 1, characterized in that: The air supply mechanism includes a fan and an air supply pipe (3). One end of the air supply pipe (3) is connected to the first flow equalization layer (21), and the other end of the air supply pipe (3) is connected to the output end of the fan.

3. The tea withering ventilation device as described in claim 2, characterized in that: The air supply mechanism also includes several air supply branch pipes (31), which are fixed at equal intervals and connected to each other on the side wall of the first flow equalization layer (21), and the outer ends of the air supply branch pipes (31) are all connected to the air supply pipe (3).

4. The tea withering ventilation device as described in claim 2, characterized in that: A partition (23) is fixedly disposed between the first flow equalization layer (21) and the second flow equalization layer (22), and the partition (23) is provided with a plurality of connecting holes (231).

5. A tea withering ventilation device as described in claim 4, characterized in that: The diameter of the connecting hole (231) gradually decreases from one side of the air supply pipe (3) towards the distance.

6. A tea withering ventilation device as described in claim 1, characterized in that: The leaf support mesh (4) is also surrounded by a connecting frame (41), and a handle (42) is fixedly installed on one side of the connecting frame (41).

7. A tea withering ventilation device as described in claim 6, characterized in that: The frame (1) has a pair of sliding grooves (13) arranged opposite each other below the flow equalization box (2). The sliding grooves (13) allow the two sides of the connecting frame (41) to be embedded and slide relative to each other.

8. A tea withering ventilation device as described in claim 7, characterized in that: The frame (1) is provided with a locking member on one side of the sliding groove (13). The locking member includes a rotatable stop bar (5) that can be rotated to block the groove opening outside the sliding groove (13).

9. A tea withering ventilation device as described in claim 1, characterized in that: The top of the flow equalization box (2) is set to be inclined.

10. A tea withering ventilation device as described in claim 1, characterized in that: The frame (1) is equipped with sliding wheels (15) at the four corners of its bottom.

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