A ventilation and air distribution structure for drying equipment

Abstract

This utility model discloses a ventilation and air distribution structure for a drying device, belonging to the field of nut drying technology. It includes a drying chamber, an annular secondary air distribution chamber connected to the outside of the drying chamber via an auxiliary guide channel, and a main air supply chamber connected to the annular secondary air distribution chamber. A throttling and control component is connected to the main air supply chamber. Multiple guide vanes are evenly arranged within the auxiliary guide channel, and a feedback detection component is located at one end of the auxiliary guide channel near the drying chamber. This utility model can solve the technical problems of single air distribution, sluggish control, and insufficient uniformity in existing drying equipment.

Description

Technical Field

[0001] This utility model belongs to the field of nut drying technology, specifically relating to a ventilation and air distribution structure for drying equipment. Background Technology

[0002] In existing drying equipment, hot air typically enters the drying chamber through a single air supply cavity. Due to the relatively fixed air distribution structure, local deviations in hot air distribution are prone to occur. Especially in cases of multi-layered materials or uneven stacking, hot air forms a high-speed mainstream near the air inlet, while the airflow is insufficient in the far end and corner areas, resulting in uneven temperature distribution and drying dead zones within the drying chamber.

[0003] Some improvement solutions attempt to achieve uniform air distribution by setting up multiple air outlets or rotating air distribution ducts, but these structures have two shortcomings: first, the opening of the air outlets is fixed and cannot be dynamically adjusted according to changes in material resistance; second, the adjustment of the air distribution direction relies on mechanical rotation, which has a lag in response and makes it difficult to make targeted corrections. As a result, the material is dried unevenly, energy consumption is increased, and the equipment's operational stability is poor.

[0004] A Chinese patent with publication number CN221729678U discloses a multi-layer cashew nut drying tunnel oven, including a combustion chamber, a baking oven, a hot air supply duct, a temperature-controlled exhaust duct, a baking conveyor line, a feeding conveyor line, and a discharging box. The combustion chamber is located at the top of the baking oven and is used to burn fuel to generate hot air. The hot air supply duct is connected between the baking oven and the combustion chamber and is used to transport the hot air generated by the combustion chamber into the baking oven. The temperature-controlled exhaust duct is connected to the baking oven and is used to discharge some of the hot air and moisture inside the baking oven. The baking oven is provided with an inlet and an outlet. The baking conveyor line is located inside the baking oven and is used to transport cashews to the baking oven for roasting. The feeding conveyor line is located at one end of the inlet and is used to transport cashews onto the baking conveyor line. The discharging box is located at the outlet.

[0005] In the aforementioned existing technology, hot air is directly introduced into the baking oven, resulting in severe air dispersion and failure to achieve uniform air distribution. Furthermore, it is impossible to control the airflow. Therefore, there is an urgent need for a ventilation and air distribution structure that can achieve multi-cavity and multi-directional air distribution, combined with dynamic throttling coordination and airflow feedback control, in order to solve the technical problems of single air distribution, slow control, and insufficient uniformity in existing drying equipment. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a ventilation and air distribution structure for drying equipment, which can solve the technical problems of single air distribution, slow control and insufficient uniformity in existing drying equipment.

[0007] The technical solution adopted by this utility model is a ventilation and air distribution structure for a drying equipment, including a drying chamber. An annular secondary air distribution chamber is connected to the outside of the drying chamber through an auxiliary guide channel. The annular secondary air distribution chamber is connected to a main air supply chamber. A throttling control component is connected to the main air supply chamber. Multiple guide vanes are evenly arranged in the auxiliary guide channel. A feedback detection component is arranged at one end of the auxiliary guide channel near the drying chamber.

[0008] The present invention is further characterized in that, The annular secondary air distribution cavity includes an upper air distribution cavity, a middle air distribution cavity, and a lower air distribution cavity. The upper air distribution cavity, the middle air distribution cavity, and the lower air distribution cavity are arranged independently and are respectively connected to the main air supply cavity.

[0009] The throttling control component includes a sliding valve, which is located at the connection between the annular secondary air distribution cavity and the main air supply cavity. A drive mechanism is externally connected to the sliding valve and is located on the outer wall of the main air supply cavity.

[0010] The feedback detection component includes a wind speed sensor and a wind pressure sensor.

[0011] The guide vane includes a rotating vane, which is rotatably connected to an electric actuator.

[0012] Both the guide vanes and the throttling control assembly are electrically connected to a controller.

[0013] The beneficial effects of this utility model are: (1) In the ventilation and air distribution structure of the drying equipment of this utility model, a throttling control component is set between the main air supply cavity and the annular secondary air distribution cavity. Through the cooperation of the sliding valve and the drive mechanism, the channel opening area can be changed in real time to achieve dynamic balance of air volume of each annular secondary air distribution cavity, and avoid excessive or insufficient air volume in a certain area.

[0014] (2) In the ventilation and air distribution structure of the drying equipment of this utility model, the guide vanes are evenly distributed in the auxiliary guide channel. The electric drive drives the rotating vanes to adjust the angle, so that the airflow can be actively deflected to the edge of the cavity or the densely accumulated area, effectively eliminating the drying dead corner.

[0015] (3) In the ventilation and air distribution structure of the drying equipment of this utility model, a feedback detection component is set at one end of the auxiliary flow channel near the drying chamber. The parameters are collected in real time by wind speed sensor and wind pressure sensor, and the data is transmitted to the controller to form a closed-loop control logic for air distribution regulation, so as to realize the intelligent distribution of air volume and adjustment of air direction. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a ventilation cloth structure for a drying equipment according to this utility model; Figure 2 yes Figure 1 Structural diagram at point A; Figure 3 This is a cross-sectional view of the main air supply cavity in the ventilation and air distribution structure of a drying equipment according to this utility model.

[0017] In the figure, 1. Drying chamber, 2. Auxiliary flow channel, 3. Annular secondary air distribution chamber, 301. Upper air distribution chamber, 302. Middle air distribution chamber, 303. Lower air distribution chamber, 4. Main air supply chamber, 5. Throttling control component, 501. Slide valve, 502. Drive mechanism, 6. Guide vane, 601. Rotating vane, 602. Electric actuator. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0019] like Figure 1-3 As shown, this utility model discloses a ventilation and air distribution structure for a drying equipment, including a drying chamber 1. The drying chamber 1 is a closed structure used to hold the material to be dried. The outer wall of the drying chamber 1 is connected to an annular secondary air distribution chamber 3 through an auxiliary guide channel 2. The auxiliary guide channel 2 is arranged in a circumferential pattern and can guide and adjust the airflow direction before the airflow enters the drying chamber 1. The outer end of the annular secondary air distribution chamber 3 is connected to a main air supply chamber 4. The main air supply chamber 4 is connected to the outlet of a hot air blower and is used to centrally transport airflow and provide stable air pressure. The air inlet of the main air supply chamber 4 is... A throttling control component 5 is provided, which can adjust the channel opening area according to control commands, thereby changing the air intake of each annular secondary air distribution cavity 3. Multiple guide vanes 6 are evenly arranged inside the auxiliary guide channel 2. The guide vanes 6 can correct the airflow direction by adjusting the angle, avoiding the formation of dead corners in the airflow inside the drying cavity 1. In addition, a feedback detection component is also provided at one end of the auxiliary guide channel 2 near the drying cavity 1, which is used to collect wind speed and wind pressure parameters in real time and transmit them to the controller, thereby realizing dynamic monitoring and closed-loop adjustment of the overall air distribution state.

[0020] The annular secondary air distribution chamber 3 includes an upper air distribution chamber 301, a middle air distribution chamber 302, and a lower air distribution chamber 303. These three chambers are structurally independent and arranged around different height positions of the drying chamber 1, thus forming a multi-layer air distribution path in the vertical direction. The upper air distribution chamber 301, the middle air distribution chamber 302, and the lower air distribution chamber 303 are all connected to the main air supply chamber 4 through independent air inlet channels, and can obtain different airflow rates according to the opening of the throttling control component 5. Through this layered and independent arrangement, the upper, middle, and lower annular air distribution chambers can each form an independent air supply area during operation, which not only ensures the uniformity of airflow distribution in the drying chamber 1, but also allows for differentiated adjustment according to the packing density and drying requirements of materials at different layers, thereby effectively avoiding the problem of uneven drying between upper and lower layers caused by air supply from a single air chamber.

[0021] The throttling control component 5 includes a slide valve 501, which is installed at the connection between the annular secondary air distribution chamber 3 and the main air supply chamber 4. It is used to control the channel opening area between the two. When the slide valve 501 is at different opening degrees, the air intake volume of the corresponding annular secondary air distribution chamber 3 can be adjusted, thereby changing the hot air distribution state entering the drying chamber 1. A drive mechanism 502 is connected to the outside of the slide valve 501. The drive mechanism 502 is fixed to the outer wall of the main air supply chamber 4 and is connected to the slide valve 501 for transmission. It is used to drive the slide valve 501 to move between opening and closing. The drive mechanism 502 can be a motor drive component or a pneumatic actuator. It can achieve precise adjustment after the controller issues a command, so that the air supply volume of each annular secondary air distribution chamber 3 can be dynamically balanced in real time, thereby ensuring the uniformity and stability of the airflow distribution inside the drying chamber 1.

[0022] The feedback detection component includes a wind speed sensor and a wind pressure sensor. The wind speed sensor is used to detect the flow velocity of the airflow entering the drying chamber 1 in real time to determine the air volume distribution in each air supply area. The wind pressure sensor is used to monitor the air pressure changes in the annular secondary air distribution chamber 3 and the auxiliary guide channel 2 to reflect the pipe resistance and the airflow balance state of the chamber. The wind speed sensor and the wind pressure sensor are respectively installed at one end of the auxiliary guide channel 2 near the drying chamber 1, which can synchronously collect dynamic data of airflow operation and transmit the detection results to the controller, thereby providing real-time feedback basis for the adjustment of the throttling control component 5 and the guide vanes 6, realizing balanced air distribution control and operation status monitoring.

[0023] The guide vane 6 includes a rotating vane 601. One end of the rotating vane 601 is rotatably connected to the inner wall of the auxiliary guide channel 2 via a rotating shaft, and the other end is connected to an electric actuator 602. The electric actuator 602 is installed on the outer wall of the auxiliary guide channel 2 and drives the rotating vane 601 to switch between different angle positions through a transmission mechanism, thereby changing the flow direction of hot air when entering the drying chamber 1. By adjusting the tilt angle of the rotating vane 601, the airflow can be guided to different areas inside the drying chamber 1 to achieve directional compensation for areas with insufficient wind speed. The electric actuator 602 can precisely control the movement of the rotating vane 601 according to the adjustment command output by the controller, so that the auxiliary guide channel 2 has a flexible air distribution adjustment capability, thereby ensuring a more uniform airflow distribution inside the drying chamber 1 and improving the overall consistency of material drying.

[0024] Both the guide vane 6 and the throttling control component 5 are electrically connected to a controller. The controller establishes a communication connection with the electric driver 602 and the drive mechanism 502 to receive the wind speed and wind pressure signals transmitted by the feedback detection component. Based on the detection results, the controller outputs control commands to the guide vane 6 and the throttling control component 5 respectively. Under the coordination of the controller, the guide vane 6 can adjust its rotation angle in real time according to the local airflow state, thereby changing the airflow injection direction. The throttling control component 5 can adjust the air intake of different annular secondary air distribution cavities 3 by adjusting the opening of the slide valve 501. The two form a linkage adjustment mechanism under the unified scheduling of the controller, so that the air distribution system has a closed-loop adaptive adjustment function during operation, effectively improving the uniformity and stability of the airflow distribution inside the drying cavity 1, and ensuring the drying effect and energy efficiency of the material.

[0025] Working principle: During operation, the hot air blower delivers heated high-temperature airflow to the main air supply chamber 4, and distributes it into each annular secondary air distribution chamber 3 through the throttling control component 5. The upper air distribution chamber 301, middle air distribution chamber 302, and lower air distribution chamber 303 obtain corresponding air volumes according to the opening of the slide valve 501, thus forming a multi-layered, surrounding hot air supply path. Before entering the drying chamber 1, the airflow passes through the auxiliary guide channel 2 and is adjusted by the angle of the guide vanes 6, which can change the spray direction as needed to achieve directional compensation for different areas and avoid the formation of airflow dead zones inside the drying chamber 1. Meanwhile, the wind speed sensor and wind pressure sensor installed at one end of the auxiliary guide channel 2 near the drying chamber 1 collect airflow parameters in real time and feed the detection results back to the controller. The controller issues adjustment commands to the slide valve 501 and the rotating blade 601 based on the monitoring data, so that the throttling control component 5 and the guide blade 6 work together to achieve dynamic correction of airflow and airflow direction. Through the above closed-loop control process, the device can always maintain the uniformity and stability of airflow distribution inside the drying chamber 1 when the material accumulation or drying state changes, thereby improving the overall drying effect and energy efficiency of the material.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A ventilation and air distribution structure for a drying apparatus, characterized by The equipment includes a drying chamber (1), which is connected to an annular secondary air distribution chamber (3) via an auxiliary flow channel (2). The annular secondary air distribution chamber (3) is connected to a main air supply chamber (4). A throttling control component (5) is connected to the main air supply chamber (4). Multiple guide vanes (6) are evenly arranged inside the auxiliary flow channel (2). A feedback detection component is provided at one end of the auxiliary flow channel (2) near the drying chamber (1).

2. The ventilation structure according to claim 1, wherein The annular secondary air distribution cavity (3) includes an upper air distribution cavity (301), a middle air distribution cavity (302) and a lower air distribution cavity (303). The upper air distribution cavity (301), the middle air distribution cavity (302) and the lower air distribution cavity (303) are arranged independently and are respectively connected to the main air supply cavity (4).

3. The ventilation structure according to claim 2, wherein The throttling control component (5) includes a slide valve (501), which is located at the connection between the annular secondary air distribution cavity (3) and the main air supply cavity (4). A drive mechanism (502) is externally connected to the slide valve (501), which is located on the outer wall of the main air supply cavity (4).

4. The ventilation structure according to claim 3, wherein The feedback detection component includes a wind speed sensor and a wind pressure sensor.

5. The ventilation structure according to claim 4, wherein The guide vane (6) includes a rotating vane (601), which is rotatably connected to an electric actuator (602).

6. The ventilation structure according to claim 5, wherein Both the guide vane (6) and the throttling control component (5) are electrically connected to a controller.

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