Curing barn

Abstract

The curing barn comprises a curing chamber, a circulation driving chamber and a heating module, a circulation fan is arranged in the circulation driving chamber, the circulation driving chamber communicates with the curing barn, air in the curing barn flows into the circulation driving chamber through a first air opening, and air in the circulation driving chamber is discharged into the curing barn through a second air opening; the heating module is arranged on an air outlet channel of the second air opening. The heating module comprises a plurality of plane heating films, and the plane heating films are parallel to the air outlet direction of the second air opening and are arranged at intervals, so that outlet air of the second air opening is heated when penetrating through the plane heating films. The plane heating films of the heating module are vertically distributed in the curing barn, and the space temperature between the plane heating films is adjusted by controlling the distance between the plane heating films according to different wind speeds in different areas in the curing barn, so that air flowing through the plane heating films is gradually and uniformly heated, and uniform temperature rise in the curing barn is realized to bake tobacco leaves.

Description

Technical Field

[0001] This invention relates to the field of drying room technology, and more particularly to a drying room. Background Technology

[0002] Curing barns are essential equipment in flue-cured tobacco production. After being cured and processed inside the barn, tobacco leaves develop their unique color, aroma, flavor, and shape, becoming high-quality raw materials that meet the needs of the cigarette industry. Traditional curing barn heating systems are typically located in a separate furnace on one side of the barn. Coal or electricity is burned to heat the cooling fins within the furnace, creating a high-temperature heat source. When circulating air flows over the fins, its temperature is instantly raised. This high-temperature air then flows through the curing barn, further heating it before gradually cooling down for the next cycle. Because the fans are located inside the furnace, significant differences in air velocity and temperature between the front and rear sections of the barn result in uneven heating. This leads to inconsistent tobacco quality across the upper and lower sections, as well as between the front and rear sections, negatively impacting the economic interests of tobacco farmers. Therefore, a new curing barn with a novel heating method is needed to address these problems. Summary of the Invention

[0003] This invention provides a drying oven to solve one or more technical problems encountered in the prior art.

[0004] In a first aspect, embodiments of the present invention provide a drying oven, comprising: Baking room; A circulating drive chamber is provided with a circulating fan. The circulating drive chamber is connected to the baking chamber. Air from the baking chamber flows into the circulating drive chamber through a first air vent, and air from the circulating drive chamber is discharged into the baking chamber through a second air vent. A heating module is disposed on the air outlet duct of the second air vent. The heating module includes several planar heating films, which are parallel to the air outlet direction of the second air vent and spaced apart, so that the air outlet from the second air vent is heated when passing through the planar heating films. The spacing between the planar heating films is D, and when the air velocity passing through the space between the planar heating films is v, then... ; Where D is the distance between the planar heating films, L is the length of the heating surface, and P is the power density of the heating surface. This refers to the temperature rise of the air in the baking chamber over multiple time periods. The specific heat capacity of air at constant pressure. This refers to air density.

[0005] In a preferred embodiment, the drying oven further includes an exhaust port, an air inlet, and a dehumidification device. The exhaust port is located near a first air vent, and the air inlet is located near a second air vent. The dehumidification device includes a controller, a humidity control center, and a detection unit. The detection unit is located inside the drying oven and is used to detect the humidity inside the drying oven. The detection unit is communicatively connected to the humidity control center, which receives the humidity value detected by the detection unit. The humidity control center compares the detected humidity value with a humidity threshold within a set time period. When the detected humidity value is greater than the humidity threshold within the set time period, the humidity control center sends a dehumidification signal. The controller is communicatively connected to the humidity control center and receives the dehumidification signal sent by the humidity control center. The air inlet is an electric valve and is communicatively connected to the controller. The controller controls the air inlet to open and allow dry air to enter after receiving the dehumidification signal. The exhaust port is a self-closing louvered fan structure. When the air inlet is opened to allow dry air to enter, the exhaust port is automatically opened and closed under pressure to expel humid air. Alternatively, the exhaust port may be an electric valve, which is communicatively connected to the controller. The controller is used to control the exhaust port to open and discharge humid air after receiving a dehumidification signal.

[0006] In a preferred embodiment, the planar heating film comprises: Base; A heating layer covering the substrate, the heating layer being used for electrothermal conversion when energized; Electrodes are disposed on both sides of the heating layer, are in contact with the heating layer, and are electrically connected to a power source. An encapsulation layer covers the heating layer and the electrode, and the encapsulation layer is bonded to the substrate to encapsulate the substrate, the heating layer and the electrode into a single structure.

[0007] In a preferred embodiment, the heating layer is an electrothermal conversion layer made of one or more of graphene, carbon nanotubes, metal alloys, or conductive polymers through physical vapor deposition, printing, or coating processes.

[0008] In a preferred embodiment, the heating layer is an electrothermal conversion layer formed by vacuum deposition of at least one semiconductor metal oxide selected from ZnOxS(1-x), InOxS(1-x), SnxIn(1-x)O, ZnxMg(1-x)O and ZnxAl(1-x)O.

[0009] In a preferred embodiment, the thickness of the heating layer is less than 1000 nm.

[0010] In a preferred embodiment, the heating power of the planar heating film is 200-1500w / m².

[0011] In a preferred embodiment, the height difference between the top and bottom of the planar heating film in the vertical direction is less than 100cm.

[0012] One of the above technical solutions has the following advantages or beneficial effects: the planar heating film of the heating module is vertically distributed in the curing chamber, and the spacing of the planar heating film is controlled according to the different wind speeds in different areas of the curing chamber to adjust the temperature of the space between the planar heating films, so as to gradually and evenly heat the air flowing between the planar heating films, thereby achieving uniform temperature rise in the curing chamber for curing tobacco leaves.

[0013] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0014] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in the invention and should not be construed as limiting the scope of the invention.

[0015] Figure 1 This is a schematic cross-sectional view of the overall internal structure of the tobacco curing barn in this embodiment.

[0016] Figure 2 This is a cross-sectional schematic diagram of the planar heating film in this embodiment. Specific Implementation

[0017] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0018] This embodiment provides a drying room, see [link / reference] Figure 1 As shown, the baking room includes a baking chamber 100, a circulation drive chamber 300, and a heating module 200.

[0019] A circulating fan 301 is provided in the circulating drive chamber 300. The circulating drive chamber 300 is connected to the baking chamber 100. Air from the baking chamber 100 flows into the circulating drive chamber 300 through the first air vent 302, and air in the circulating drive chamber 300 is discharged into the baking chamber 100 through the second air vent 303.

[0020] The heating module 200 is disposed on the air outlet duct of the second air vent 303; the heating module 200 includes a plurality of planar heating films, which are parallel to the air outlet direction of the second air vent 303 and spaced apart, so that the air outlet of the second air vent 303 is heated when passing through the planar heating films; wherein, the spacing between the planar heating films is D, and when the air velocity passing through the space between the planar heating films is v, then ; Where D is the distance between the planar heating films, L is the length of the heating surface, and P is the power density of the heating surface. This refers to the temperature rise of the air in the baking chamber over multiple time periods. The specific heat capacity of air at constant pressure. This refers to air density.

[0021] The circulating air, initially at a low inlet temperature, is continuously heated by heat convection and infrared radiation from the heating film surface as it flows through the planar heating modules, eventually reaching the set temperature. The required heating parameters are controlled by adjusting the power of the planar heating film and the distance the circulating air travels across it. Generally, after 2-3 air cycles, the temperature inside the tobacco curing barn becomes uniform, with a temperature difference within ±5 degrees Celsius. Furthermore, to further enhance temperature uniformity, the heating or disconnection of individual modules can be controlled separately.

[0022] In this embodiment, planar heating films of the heating module are vertically distributed in the curing room. The spacing of the planar heating films is controlled according to the different wind speeds in different areas of the curing room to adjust the temperature of the space between the planar heating films. This gradually and evenly heats the air flowing between the planar heating films, achieving uniform temperature rise in the curing room for curing tobacco leaves.

[0023] In one specific embodiment, see Figure 1As shown, the drying chamber also includes an exhaust port 400, an air inlet 401, and a dehumidification device. The exhaust port 400 is located near the first air vent 302, and the air inlet 401 is located near the second air vent 303. The dehumidification device includes a controller, a humidity control center, and a detection unit. The detection unit is located inside the drying chamber 100 and is used to detect the humidity inside the drying chamber 100. The detection unit is communicatively connected to the humidity control center, which is used to receive the humidity value detected by the detection unit. The humidity control center is used to compare the detected humidity value with a humidity threshold within a set time period. When the detected humidity value is greater than the humidity threshold within the set time period, the humidity control center is used to issue a dehumidification signal. The controller is communicatively connected to the humidity control center and is used to receive the dehumidification signal issued by the humidity control center. The air inlet 401 is an electric valve and is communicatively connected to the controller. The controller is used to control the air inlet 401 to open and allow dry air to enter after receiving the dehumidification signal.

[0024] The exhaust port 400 is a self-closing louvered fan structure. When the air inlet 401 is opened to allow dry air to enter, the exhaust port 400 is automatically opened and closed under pressure to expel humid air.

[0025] Alternatively, the exhaust port 400 may be an electric valve, and the exhaust port 400 may be communicatively connected to the controller, which may be used to control the exhaust port 400 to open and exhaust humid air after receiving a dehumidification signal.

[0026] In one specific embodiment, see Figure 2 As shown, the planar heating film includes a substrate 201, a heating layer 202, an electrode 203, and an encapsulation layer 204.

[0027] The heating layer 202 covers the substrate 201 and is used for electrothermal conversion when energized.

[0028] The electrodes 203 are disposed on both sides of the heating layer 202, the electrodes 203 are in contact with the heating layer 202, and the electrodes 203 are electrically connected to the power supply.

[0029] The encapsulation layer 204 covers the heating layer 202 and the electrode 203, and the encapsulation layer 204 is bonded to the substrate 201 to encapsulate the substrate 201, the heating layer 202 and the electrode 203 into a single structure.

[0030] In one specific embodiment, the heating layer 202 is an electrothermal conversion layer made of one or more of graphene, carbon nanotubes, metal alloys or conductive polymers through physical vapor deposition, printing or coating processes.

[0031] In one specific embodiment, the heating layer 20 is an electrothermal conversion layer formed by vacuum deposition of at least one semiconductor metal oxide selected from ZnOxS(1-x), InOxS(1-x), SnxIn(1-x)O, ZnxMg(1-x)O and ZnxAl(1-x)O.

[0032] In one specific embodiment, the thickness of the heating layer 202 is less than 1000 nm.

[0033] In one specific embodiment, the heating power of the planar heating film is 200-1500w / m².

[0034] In one specific embodiment, the height difference between the top and bottom of the planar heating film in the vertical direction is less than 100cm.

[0035] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A drying room, characterized in that, include: Baking room; A circulating drive chamber is provided with a circulating fan. The circulating drive chamber is connected to the baking chamber. Air from the baking chamber flows into the circulating drive chamber through a first air vent, and air from the circulating drive chamber is discharged into the baking chamber through a second air vent. A heating module is disposed on the air outlet duct of the second air vent. The heating module includes several planar heating films, which are parallel to the air outlet direction of the second air vent and spaced apart, so that the air outlet from the second air vent is heated when passing through the planar heating films. The spacing between the planar heating films is D, and when the air velocity passing through the space between the planar heating films is v, then... ; Where D is the distance between the planar heating films, L is the length of the heating surface, and P is the power density of the heating surface; This refers to the temperature rise of the air in the baking chamber over multiple time periods. The specific heat capacity of air at constant pressure. This refers to air density.

2. The drying room as described in claim 1, characterized in that, It also includes an exhaust port, an air inlet, and a dehumidification device. The exhaust port is located near the first air vent, and the air inlet is located near the second air vent. The dehumidification device includes a controller, a humidity control center, and a detection unit. The detection unit is located inside the drying chamber and is used to detect the humidity inside the drying chamber. The detection unit is communicatively connected to the humidity control center, which is used to receive the humidity value detected by the detection unit. The humidity control center is used to compare the detected humidity value with a humidity threshold within a set time period. When the detected humidity value is greater than the humidity threshold within the set time period, the humidity control center is used to issue a dehumidification signal. The controller is communicatively connected to the humidity control center and is used to receive the dehumidification signal issued by the humidity control center. The air inlet is an electric valve and is communicatively connected to the controller. The controller is used to control the air inlet to open and allow dry air to enter after receiving the dehumidification signal. The exhaust port is a self-closing louvered fan structure. When the air inlet is opened to allow dry air to enter, the exhaust port is automatically opened and closed under pressure to expel humid air. Alternatively, the exhaust port may be an electric valve, which is communicatively connected to the controller. The controller is used to control the exhaust port to open and discharge humid air after receiving a dehumidification signal.

3. The drying room as described in claim 1 or 2, characterized in that, The planar heating film includes: Base; A heating layer covering the substrate, the heating layer being used for electrothermal conversion when energized; Electrodes are disposed on both sides of the heating layer, are in contact with the heating layer, and are electrically connected to a power source. An encapsulation layer covers the heating layer and the electrode, and the encapsulation layer is bonded to the substrate to encapsulate the substrate, the heating layer and the electrode into a single structure.

4. The drying room as described in claim 3, characterized in that, The heating layer is an electrothermal conversion layer made of one or more of graphene, carbon nanotubes, metal alloys or conductive polymers through physical vapor deposition, printing or coating processes.

5. The drying room as described in claim 3, characterized in that, The heating layer is an electrothermal conversion layer formed by vacuum deposition of at least one semiconductor metal oxide selected from ZnOxS(1-x), InOxS(1-x), SnxIn(1-x)O, ZnxMg(1-x)O and ZnxAl(1-x)O.

6. The drying room as described in claim 3, characterized in that, The thickness of the heating layer is less than 1000 nm.

7. The drying room as described in claim 3, characterized in that, The heating power of the planar heating film is 200-1500w / m².

8. The drying room as described in claim 3, characterized in that, The height difference between the top and bottom of the planar heating film in the vertical direction is less than 100cm.

Images