Air-temperature-humidity multi-field coordinated bulk curing barn

Abstract

The utility model discloses an air-temperature-humidity multi-field collaborative bulk curing barn, which relates to the technical field of tobacco processing and comprises a tobacco loading chamber and a heating chamber which are arranged separately, an air inlet is arranged at the upper part of a shared wall of the tobacco loading chamber and the heating chamber, and a return air inlet is arranged at the bottom of the shared wall; the tobacco loading chamber comprises tobacco carrying supports, data acquisition modules and a wind field adjusting module, the tobacco carrying supports divide the tobacco loading chamber into multiple layers of tobacco carrying spaces, the data acquisition modules are arranged at the bottoms of the tobacco carrying supports, the wind field adjusting module comprises variable-frequency fans and flow guide plates, and the variable-frequency fans are arranged at the ends, close to air inlets, of the tobacco carrying supports; the heating chamber comprises a temperature adjusting module, a humidity adjusting module and a control module, a vertical layered structure is designed, each layer is independently provided with a frequency conversion fan and a sensor, layered independent regulation and control are achieved, the air speed difference of all layers is reduced, uniform distribution of temperature and humidity in the curing barn is achieved in combination with the control module and a sensor network, and the curing environment is optimized.

Description

Technical Field

[0001] This utility model relates to the field of tobacco processing technology, and in particular to a dense curing barn with coordinated wind, temperature and humidity control. Background Technology

[0002] Tobacco curing is a crucial step in tobacco production, and its quality is directly affected by the uniformity and precision of temperature and humidity control in the curing barn. Traditional intensive curing barns generally employ a segmented temperature-humidity control mode, relying on the independent adjustment of single field parameters such as temperature or humidity. This lacks dynamic correlation with the airflow field, leading to problems such as uneven hot air distribution and low drying efficiency. For example, there is a significant temperature difference between the near and far areas of the oven within the curing barn, humidity gradients are difficult to control precisely, and the temperature and humidity field distribution is uneven, easily causing localized over-drying or over-wetting of tobacco leaves, resulting in inconsistent quality of finished tobacco. Some curing barns improve airflow distribution by adding fixed-speed fans or deflectors, typically using a single fan or fixed zone air supply, without achieving independent layered control. The difference in wind speed between layers often exceeds 30%. For instance, Chinese Patent Publication No. CN214316981U, entitled "A Closed-Circulation Heat Pump Intensive Curing Barn for Achieving Uniform Air Supply," lacks multi-field coordinated control of temperature, humidity, and wind speed, resulting in large fluctuations in temperature and humidity during curing, prolonged curing cycles, and significant loss of aroma substances.

[0003] To address the aforementioned technical issues, there is an urgent need for a dense curing barn capable of dynamically coupling wind, temperature, and humidity fields to balance their distribution, improve curing efficiency, and ensure the uniformity of tobacco leaf quality. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the problems in the background art mentioned above. This utility model provides a dense drying room with coordinated wind, temperature and humidity.

[0005] To achieve the above objectives, this utility model provides a multi-field coordinated drying chamber for wind, temperature, and humidity, comprising:

[0006] The smoke loading chamber and the heating chamber are separated. An air inlet is provided at the upper part of the common wall of the smoke loading chamber and the heating chamber, and an air return outlet is provided at the bottom of the common wall.

[0007] The smoke loading chamber includes a smoke-carrying bracket, a data acquisition module, and an airflow regulation module. The smoke-carrying bracket divides the smoke loading chamber into multiple smoke-carrying spaces. The data acquisition module is located at the bottom of each smoke-carrying bracket. The airflow regulation module includes a variable frequency fan and a guide plate. Each smoke-carrying bracket has a variable frequency fan near the air inlet and a variable frequency fan at the return air outlet. The guide plate is located at the angle between the side wall and the top plate at the far air inlet end of the smoke loading chamber and at the angle between the side wall and the bottom plate at the far air inlet end, forming a closed-loop airflow channel from the heating chamber through the air inlet into the smoke loading chamber, through each smoke-carrying space, and then through the bottom return air channel and back to the heating chamber through the return air outlet.

[0008] The heating chamber includes a temperature regulation module, a humidity regulation module, and a control module, wherein the temperature regulation module, the humidity regulation module, and the control module are connected in a controllable manner.

[0009] The variable frequency fan is connected to the control module and is used to independently control the wind speed at the top of each layer of the smoke-carrying support under the control of the control module.

[0010] Furthermore, the data acquisition module includes multiple sets of sensor modules. Each layer of the tobacco-carrying support is horizontally divided into multiple tobacco-carrying sections, and a set of sensor modules is centrally located at the bottom of each tobacco-carrying section.

[0011] Furthermore, the sensor module includes a wind speed sensor, a temperature sensor, and a humidity sensor, used to collect environmental data in real time, and the sensor module is electrically connected to the control module.

[0012] Furthermore, the temperature regulation module is an air source heat pump, which is connected to the control module for regulating the heating temperature under the control of the control module.

[0013] Furthermore, the humidity regulation module is a condenser dehumidifier, which is connected to the control module and is used to regulate the air humidity under the control of the control module.

[0014] Furthermore,

[0015] The control module is used to receive environmental data collected by the sensor module and to control the temperature regulation module, the humidity regulation module and the variable frequency fan.

[0016] Furthermore,

[0017] The cross-section of the guide plate is set to be arc-shaped or polygonal, and the tilt angle is adjustable. The concave side of the guide plate is the airflow path side, which is used to guide the airflow to flow in a predetermined direction.

[0018] Furthermore,

[0019] A human-machine interaction module is installed on the outer wall of the baking chamber. The human-machine interaction module is electrically connected to the control module and is used for environmental data monitoring and environmental target value setting.

[0020] Furthermore, an alarm module is installed on the outer wall of the drying room. The alarm module is electrically connected to the control module and is used to issue an alarm when the temperature, humidity, or wind speed exceeds a preset range.

[0021] Furthermore, the inner walls of the side walls, top plate, and bottom plate of the oven are covered with heat insulation material.

[0022] This invention provides a dense drying oven with coordinated air, temperature, and humidity control. It employs a vertically layered structure, dividing the interior of the drying oven's smoke-loading chamber into multiple spaces via a smoke-carrying support. Each layer is independently equipped with a variable frequency fan. An "upward supply, downward return" airflow pattern optimizes the airflow path. Combined with sensor modules installed on each layer, the wind speed of each layer is independently controlled. The control module regulates the fan speed, heating power, and dehumidification intensity, creating a uniform temperature and humidity field within the drying oven. This reduces differences in wind speed, humidity, and temperature between layers, achieving precise control with wind speed differences ≤15% and temperature differences ≤2℃ between layers. This invention effectively reduces wind speed differences between layers, ensuring uniform temperature and humidity distribution within the drying oven and optimizing the drying environment. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a structural schematic diagram of a dense drying room with coordinated wind, temperature, and humidity control according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the sensor arrangement for a dense drying oven with multi-field coordination of wind, temperature and humidity provided in one embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the guide plate arrangement of a multi-field coordinated drying oven for wind, temperature and humidity provided in one embodiment of this application;

[0027] Figure 4 This is a system logic diagram of a dense drying room with multi-field coordination of wind, temperature and humidity provided in one embodiment of this application.

[0028] The attached figures are labeled as follows:

[0029] 1-Smoke loading chamber; 2-Heating chamber; 3-Air inlet; 4-Air return outlet; 11-Smoke support bracket; 12-Sensor module; 13-Variable frequency fan; 14-Baffle plate; 21-Temperature control module; 22-Humidity control module. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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, 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.

[0031] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should be understood that although the terms first, second, third, etc., may be used to describe the acquisition modules in the embodiments of this utility model, these acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.

[0033] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0034] It should be noted that the directional terms such as "upper," "lower," "left," and "right" used in the description of the embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.

[0035] refer to Figure 1-4 This utility model provides a dense drying chamber with coordinated wind, temperature, and humidity control, comprising:

[0036] The smoke chamber 1 and the heating chamber 2 are separated. The upper part of the common wall of the smoke chamber 1 and the heating chamber 2 is provided with an air inlet 3, and the bottom of the common wall is provided with an air return outlet 4.

[0037] The tobacco loading chamber 1 includes a tobacco carrying frame 11, a data acquisition module, and a wind field adjustment module. The tobacco carrying frame 11 divides the tobacco loading chamber 1 into multiple spaces. The data acquisition module is located at the bottom of each layer of the tobacco carrying frame 11. Specifically, the data acquisition module includes multiple sets of sensor modules 12. Each layer of the tobacco carrying frame 11 is horizontally divided into multiple tobacco carrying sections. A set of sensor modules 12 is located at the center of the bottom of each tobacco carrying section. The sensor modules 12 include wind speed sensors, temperature sensors, and humidity sensors, which are used to collect real-time environmental data on wind speed, temperature, and humidity in the tobacco curing chamber.

[0038] For example, the curing barn provided in this embodiment is equipped with a three-layer tobacco-carrying support 11, which divides the curing barn into three layers: upper, middle, and lower. Each layer is 1200cm high, so that there is enough space for hanging tobacco. Each layer of tobacco-carrying support 11 is divided into three tobacco-carrying sections in the horizontal direction: left, middle, and right. A set of sensor modules 12 is set at the bottom center of each tobacco-carrying section, that is, a total of 9 sets of sensor modules 12 are set in the curing barn. This ensures comprehensive monitoring coverage of different heights and horizontal areas in the curing barn, avoiding monitoring blind spots caused by uneven ventilation or differences in tobacco density. By averaging or weighting the data from multiple points, the interference of abnormal values ​​at a single location on the overall control can be reduced, and the control accuracy can be improved.

[0039] The airflow regulation module includes a variable frequency fan 13 and a baffle plate 14. A variable frequency fan 13 is installed near the air inlet of each layer of the smoke-carrying support 11, and a variable frequency fan 13 is installed at the return air inlet 4. The baffle plate 14 is located at the angle between the side wall and the top plate at the far air inlet end of the smoke-loading chamber 1, and at the angle between the side wall and the bottom plate at the far air inlet end. For details, refer to... Figure 3 The guide plate 14 is set in an arc or zigzag shape, and the tilt angle is adjustable. The concave side of the guide plate 14 is the airflow path side, which is used to guide the airflow to flow in a predetermined direction. The airflow avoids disorderly diffusion or backflow, reduces turbulence, eliminates eddies and disturbances in the airflow, reduces resistance, and improves flow efficiency. As such, a closed-loop airflow channel is formed from the heating chamber 2 through the air inlet 3 into the smoke chamber 1, through each layer of space, and then through the bottom space and back to the heating chamber 2 through the return air inlet 4.

[0040] Heating chamber 2 includes a temperature regulation module 21, a humidity regulation module 22 and a control module, with the temperature regulation module 21 and the humidity regulation module 22 being connected to the control module.

[0041] Specifically, in this embodiment, the temperature regulation module 21 uses an air source heat pump, which is connected to the control module for regulating the heating temperature under the control of the control module.

[0042] The humidity control module 22 uses a condenser dehumidifier, which is connected to the control module for regulating air humidity under the control of the control module.

[0043] The variable frequency fan 13 is connected to the control module and drives the airflow under the control of the control module, so that the heat and moisture in the drying room are evenly distributed, and the wind speed of each layer of smoke-carrying bracket 11 can be independently controlled.

[0044] The control module is electrically connected to the sensor module 12, receives wind speed, temperature, and humidity data collected by the sensor module 12, processes it through a preset control algorithm, and outputs control signals to the temperature regulation module 21, humidity regulation module 22, and variable frequency fan 13 to coordinate the control of temperature, humidity, and wind speed in the drying room. For example, in this embodiment, the control module is a PLC, which collects and processes sensor data periodically at preset time intervals, such as every second, to control the actuators, namely the temperature regulation module 21, humidity regulation module 22, and variable frequency fan 13. In this embodiment, a multi-field coordinated wind, temperature, and humidity drying room is provided. The environmental target value can be set by the user through a human-machine interaction module, such as a touch screen. The human-machine interaction module is set on the outer wall of the drying room and electrically connected to the control module. The control module receives environmental data collected in real time by the sensor, processes it, and transmits it to the human-machine interaction module for display, so that the user can monitor the environmental data in the drying room in real time.

[0045] Therefore, the control module continuously collects real-time environmental data and considers the mutual influence between the wind field, temperature field and humidity field. It couples and optimizes the temperature, humidity and wind speed data, and dynamically adjusts the working state of the actuator in real time according to the environmental data until the temperature, humidity and wind speed in the drying room reach the target value and remain stable.

[0046] Specifically, the variable frequency fan 13 installed on the upper side of the air inlet end of each layer of tobacco support 11 can independently adjust its speed in real time according to the environmental data fed back by the sensor module 12 of each layer and by receiving the control signal sent by the control module, so as to realize the independent control of the air speed of each layer. Combined with the guide plate, a uniform temperature and humidity field is formed inside the curing chamber, avoiding the problem of uneven distribution of hot air and moisture in the traditional single fan mode, and achieving precise control of air speed difference of ≤15% and temperature difference between layers of ≤2℃. In addition, for the different air speed requirements of different curing stages, the independent variable frequency fan 13 can also dynamically match the needs of each layer. For example, the air speed of the upper layer is reduced during the high temperature stage to prevent the tobacco leaves from drying out too much, while the air speed of the lower layer is increased during the dehumidification stage to accelerate the removal of moisture.

[0047] This embodiment provides a multi-field coordinated drying oven for wind, temperature and humidity, which also includes an alarm module installed on the outer wall of the drying oven. The alarm module is electrically connected to the control module and is used to issue an alarm when the temperature, humidity or wind speed exceeds a preset range.

[0048] The inner walls of the side walls, top plate, and bottom plate of the baking oven are covered with heat insulation material, such as polyurethane foam. Preferably, the thickness of the heat insulation material is set to 10cm to reduce heat loss in the baking oven, maintain stable temperature and humidity in the baking oven, reduce temperature fluctuations, and improve the uniformity of baking effect.

[0049] In summary, this invention adopts a vertically layered structure, dividing the interior of the tobacco-loading chamber of the curing barn into multiple layers via a tobacco-carrying bracket. Each layer is independently equipped with a variable frequency fan, optimizing the airflow path through an "upward supply and downward return" airflow mode. Combined with sensor modules installed on each layer, the wind speed of each layer is independently controlled. The control module regulates the fan speed, heating power, and dehumidification intensity, creating a uniform temperature and humidity field inside the curing barn. This reduces differences in wind speed, humidity, and temperature between layers, achieving precise control with wind speed differences ≤15% and temperature differences ≤2℃ between layers. This invention effectively reduces wind speed differences between layers, ensuring uniform temperature and humidity distribution within the curing barn and optimizing the curing environment.

[0050] The above description is merely a preferred embodiment of this utility model. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalent features without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

Claims

1. A dense drying barn with coordinated wind, temperature, and humidity control, characterized in that, include: The smoke loading chamber and the heating chamber are separated. An air inlet is provided at the upper part of the common wall of the smoke loading chamber and the heating chamber, and an air return outlet is provided at the bottom of the common wall. The smoke loading chamber includes a smoke-carrying bracket, a data acquisition module, and an airflow regulation module. The smoke-carrying bracket divides the smoke loading chamber into multiple spaces. The data acquisition module is located at the bottom of each layer of the smoke-carrying bracket. The airflow regulation module includes a variable frequency fan and a guide plate. The variable frequency fan is installed at the near air inlet end of each layer of the smoke-carrying bracket, and a variable frequency fan is installed at the return air inlet. The guide plate is located at the angle between the side wall and the top plate at the far air inlet end of the smoke loading chamber, and at the angle between the side wall and the bottom plate at the far air inlet end, forming a closed-loop airflow channel from the heating chamber through the air inlet into the smoke loading chamber, flowing through each layer of space, and then returning to the heating chamber through the return air inlet via the bottom space. The heating chamber includes a temperature regulation module, a humidity regulation module, and a control module, wherein the temperature regulation module, the humidity regulation module, and the control module are connected in a controllable manner. The variable frequency fan is connected to the control module and is used to control the wind speed of each layer of smoke-carrying bracket under the control of the control module.

2. The dense drying barn with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, include: The data acquisition module includes multiple sets of sensor modules. Each layer of the tobacco-carrying support is horizontally divided into multiple tobacco-carrying sections, and a set of sensor modules is centrally located at the bottom of each tobacco-carrying section.

3. The dense drying room with multi-field synergy of wind, temperature, and humidity as described in claim 2, characterized in that, include: The sensor module includes a wind speed sensor, a temperature sensor, and a humidity sensor, which are used to collect environmental data in real time. The sensor module is electrically connected to the control module.

4. The dense drying barn with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, include: The temperature regulation module is an air source heat pump, which is connected to the control module and is used to regulate the heating temperature under the control of the control module.

5. The dense drying barn with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, include: The humidity control module is a condenser dehumidifier, which is connected to the control module and is used to adjust the air humidity under the control of the control module.

6. The dense drying barn with multi-field synergy of wind, temperature, and humidity as described in claim 2, characterized in that, include: The control module is used to receive environmental data collected by the sensor module and to control the temperature regulation module, the humidity regulation module and the variable frequency fan.

7. The dense drying barn with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, include: The cross-section of the guide plate is set to be arc-shaped or polygonal, and the tilt angle is adjustable. The concave side of the guide plate is the airflow path side, which is used to guide the airflow to flow in a predetermined direction.

8. The dense drying room with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, Also includes: A human-machine interaction module is installed on the outer wall of the baking chamber. The human-machine interaction module is electrically connected to the control module and is used for environmental data monitoring and environmental target value setting.

9. The dense drying barn with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, Also includes: An alarm module is installed on the outer wall of the drying room. The alarm module is electrically connected to the control module and is used to issue an alarm when the temperature, humidity or wind speed exceeds a preset range.

10. The dense drying room with multi-field synergy of wind, temperature, and humidity as described in claim 1, characterized in that, include: The inner walls of the side walls, top plate, and bottom plate of the drying room are covered with heat insulation material.

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