Tobacco leaf heating and humidifying moisture regaining room

Abstract

The utility model relates to the technical field of tobacco leaf production, and provides a tobacco leaf heating and humidifying moisture regaining room which comprises a moisture regaining room body, and a storage frame is arranged in the moisture regaining room body and used for containing tobacco leaves; the heating and humidifying device is arranged on the outer side of the moisture regaining room body, the heating and humidifying device comprises a fan assembly, an air outlet pipe and an air inlet pipe, an air outlet of the fan assembly faces the air outlet pipe, and an air suction opening of the fan assembly faces the air inlet pipe; the air supply pipe is connected with the air outlet pipe, the air supply pipe is arranged at the top in the moisture regaining room body, and a plurality of air supply outlets facing the storage rack are formed in the pipe wall of the air supply pipe; the at least two air return pipes are arranged on the two sides of the air supply pipe correspondingly, and the storage rack is located between the air return pipes and the air supply pipe; the air return branch pipes are connected to the air return pipe, and air return openings are formed in the lower portions of the air return branch pipes and connected with the air inlet pipe. Wet hot air is fed into the room body, and then the air obliquely flows downwards from the top to the two sides under the suction of return air of the return air branch pipes, so that the uniformity of heating and humidifying tobacco leaves is improved.

Description

Technical Field

[0001] This application relates to the field of tobacco production technology, and more specifically, to a tobacco heating and humidification rehumidification chamber. Background Technology

[0002] Because the cycle from raw tobacco entering the warehouse to finished product leaving the warehouse is relatively long, the tobacco leaves lose a lot of moisture before and after sorting during this process. As a result, the breakage rate of tobacco leaves is relatively high during sorting and leaf laying. In order to reduce the breakage rate of tobacco leaves and increase the yield of finished tobacco sheets, the tobacco leaves need to be rehydrated before sorting or re-drying.

[0003] Existing technologies typically involve temporarily storing tobacco leaves in a rehumidification room using storage racks, and then heating and humidifying them through artificial steam spraying. However, in practice, the heating and humidification of tobacco leaves is uneven, which can cause an irreversible reduction in the chemical composition of the tobacco leaves. Furthermore, this method is inefficient and cannot meet the storage needs of large quantities of tobacco leaves. In addition, the gases produced after heating and humidifying the tobacco leaves are emitted into the air, causing air pollution. Utility Model Content

[0004] To address the technical problem of uneven heating and humidification of tobacco leaves and to meet the storage needs of large quantities of tobacco leaves, this application proposes a tobacco leaf heating and humidification rehumidification chamber.

[0005] In view of this, this application proposes a tobacco leaf heating and humidification rehumidification chamber, comprising: a rehumidification chamber body, wherein a storage rack is provided inside the rehumidification chamber body for storing tobacco leaves; a heating and humidification device, disposed on the outside of the rehumidification chamber body, the heating and humidification device including a fan assembly, an air outlet pipe and an air inlet pipe, the air outlet of the fan assembly facing the air outlet pipe and the air inlet of the fan assembly facing the air inlet pipe; an air supply pipe connected to the air outlet pipe, the air supply pipe being disposed at the top of the rehumidification chamber body, the air supply pipe having multiple air supply ports facing the storage rack on its wall; at least two return air pipes, respectively disposed on both sides of the air supply pipe, the storage rack being located between the return air pipes and the air supply pipes; and multiple return air branch pipes connected to the return air pipes, the lower part of the return air branch pipes having return air ports, the return air ports being connected to the air inlet pipes.

[0006] In some technical solutions, optionally, at least two return air ducts include a first return air duct and a second return air duct, the first return air duct and the second return air duct are located at the top of the opposite side walls of the rehumidification room, the return air ducts are arranged parallel to the supply air ducts, and multiple return air branch ducts are spaced apart along the axial direction of the return air ducts.

[0007] In some technical solutions, the tobacco heating and humidification rehumidification chamber may optionally include: a connecting pipe that connects the first return air pipe and the second return air pipe to form a return air channel, wherein the inner diameter of the return air channel decreases from the air inlet to the end along the airflow direction.

[0008] In some technical solutions, optionally, there are multiple return air vents, which are set on the outer peripheral wall of the return air branch pipe and arranged at intervals along the axial direction of the return air branch pipe.

[0009] In some technical solutions, optionally, the aperture size of multiple return air inlets decreases progressively from bottom to top along the vertical direction.

[0010] In some technical solutions, optionally, multiple air outlets are distributed on both sides of the bottom of the air supply duct, and the air outlet of each air outlet is inclined downward toward the corresponding return air branch duct.

[0011] In some technical solutions, the tobacco heating and humidification rehumidification chamber may optionally include: a first regulating valve, installed in the air inlet pipe, used to control the air inlet volume; and a second regulating valve, installed in the air outlet pipe, used to control the air outlet volume.

[0012] In some technical solutions, optionally, the tobacco heating and humidification rehumidification chamber also includes: multiple humidity sensors, respectively installed in the rehumidification chamber body, the heating and humidification device, the return air vent, and the supply air vent, for detecting the humidity inside the rehumidification chamber, the humidity of the airflow inside the heating and humidification device, the return air humidity, and the supply air humidity; and multiple temperature sensors, respectively installed in the rehumidification chamber body, the heating and humidification device, the return air vent, and the supply air vent, for detecting the temperature inside the rehumidification chamber, the airflow temperature inside the heating and humidification device, the return air temperature, and the supply air temperature.

[0013] In some technical solutions, the tobacco heating and humidification rehumidification room may optionally include: a fresh air duct, one end of which is connected to the air inlet duct and the other end of which is connected to the outside; and a third regulating valve, which is installed in the fresh air duct and is used to regulate the amount of fresh air introduced.

[0014] In some technical solutions, the return air duct may optionally include multiple connecting pipe sections and multiple tee fittings, with two adjacent connecting pipe sections connected to two opposite ports of the tee fittings, and the other port of the tee fittings connected to the return air branch pipe.

[0015] Compared with the prior art, this application has the following technical effects:

[0016] The tobacco leaf heating and humidification rehumidification chamber provided in this application heats and humidifies the air through a heating and humidification device. The heated and humidified air then enters the rehumidification chamber through an air supply duct to heat and humidify the tobacco leaves. Afterward, the air is collected and returned to the heating and humidification device through a return air duct for further heating and humidification, thus achieving a circulating flow and reducing environmental pollution. Under the suction of return air from multiple return air branch ducts, the air in the rehumidification chamber flows downwards from the center of the top to the left and right sides, improving the uniformity of airflow and the uniformity of heating and humidifying the tobacco leaves, meeting the needs of large-scale tobacco leaf production.

[0017] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This illustration shows one of the structural schematic diagrams of a tobacco heating and humidification rehumidification chamber according to one embodiment of this application;

[0020] Figure 2 This is shown as a second schematic diagram of the structure of a tobacco heating and humidification rehumidification chamber according to one embodiment of this application;

[0021] Figure 3 It shows Figure 1 A schematic diagram of the air supply duct in a tobacco heating and humidification rehumidification room;

[0022] Figure 4 It shows Figure 1 A schematic diagram of the return air duct structure of the tobacco heating and humidification rehumidification room.

[0023] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0024] 100 Tobacco leaf heating and humidification rehumidification room, 110 Rehumidification room body, 112 Storage rack, 120 Heating and humidification device, 122 Air outlet duct, 124 Air inlet duct, 130 Air supply duct, 132 Air supply outlet, 140 Return air duct, 142 First return air duct, 144 Second return air duct, 146 Connecting pipe, 147 Connecting pipe, 148 T-joint, 150 Return air branch duct, 152 Return air outlet, 160 First regulating valve, 162 Second regulating valve, 170 Fresh air duct, 172 Third regulating valve. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0027] The following reference Figures 1 to 4 This application describes a tobacco heating and humidification rehumidification chamber 100 according to some embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this application proposes a tobacco leaf heating and humidification rehumidification chamber 100, comprising: a rehumidification chamber body 110, with a storage rack 112 inside the rehumidification chamber body 110 for storing tobacco leaves; a heating and humidification device 120 disposed outside the rehumidification chamber body 110, the heating and humidification device 120 including a fan assembly, an air outlet 122 and an air inlet 124, the air outlet of the fan assembly facing the air outlet 122 and the air inlet of the fan assembly facing the air inlet 124; and an air supply duct 130, connected to the air outlet... The air duct 122 is connected, and the air supply duct 130 is set at the top inside the rehumidification room 110. The wall of the air supply duct 130 is provided with multiple air supply ports 132 facing the storage rack 112; at least two return air ducts 140 are respectively set on both sides of the air supply duct 130, and the storage rack 112 is located between the return air duct 140 and the air supply duct 130; multiple return air branch pipes 150 are connected to the return air duct 140, and the lower part of the return air branch pipe 150 is provided with a return air port 152, which is connected to the air inlet duct 124.

[0029] The tobacco leaf heating and humidification rehumidification chamber 100 provided in this application includes a rehumidification chamber body 110, a heating and humidification device 120, an air supply duct 130, at least two return air ducts 140, and multiple return air branch ducts 150. The heating and humidification device 120 includes a fan assembly, an air outlet duct 122, and an air inlet duct 124, as well as a humidifier and a heater. The heating and humidification device 120 is located outside the rehumidification chamber body 110 and can heat and humidify the air to form humid hot air with a set humidity and temperature. Then, the humid hot air is evenly delivered into the rehumidification chamber body 110 through the air outlet 132 of the air supply duct 130 by the fan assembly, ensuring that the tobacco leaves obtain stable temperature and humidity conditions in a closed environment.

[0030] The storage rack 112 is located between the return air duct 140 and the supply air duct 130. The supply air duct 130 at the top of the rehumidification chamber 110, together with the return air ducts 140 on both sides, forms a "W"-shaped airflow path. Multiple return air branch pipes 150 enable the circulating airflow to form a multi-dimensional flow in the storage rack 112 area, eliminating dead airflow corners and ensuring that tobacco leaves in different positions can be fully penetrated by humid and hot air.

[0031] The rehumidification chamber 110 is a sealed space. The fan assembly drives the humid and hot air to circulate between the heating and humidification device 120 and the rehumidification chamber 110. The humid and hot air is recycled and then re-enters the rehumidification chamber 110, reducing energy loss. At the same time, the sealed space structure effectively prevents air from escaping, improving the rehumidification efficiency of tobacco leaves.

[0032] Humidifiers and heaters can humidify and heat the air as needed. The controllable temperature and humidity environment prevents localized excessive moisture and mold growth or dryness and brittleness of tobacco leaves, maintains the toughness and stability of the internal chemical composition of tobacco leaves, and provides quality assurance for subsequent processing.

[0033] This application uses a heating and humidifying device 120 to heat and humidify the air. The heated and humidified air enters the rehumidification chamber 110 through the air supply duct 130. The air is blown downwards from the top of the rehumidification chamber 110 through multiple air outlets 132 and flows to both sides of the rehumidification chamber 110, heating and humidifying the tobacco leaves stored in the rehumidification chamber 110. Then, the air is recovered through multiple return air branch pipes 150 on both sides of the rehumidification chamber 110. The air enters the return air branch pipes 150 from the lower return air inlet 152, is collected and returned to the heating and humidifying device 120 through the return air pipe 140, and is heated and humidified again to achieve circulation and reduce environmental pollution. Under the return air attraction of the multiple return air branch pipes 150, the air in the rehumidification chamber 110 flows downwards from the top to both sides, improving the uniformity of airflow and thus improving the uniformity of heating and humidifying the tobacco leaves, meeting the production needs of large-scale tobacco leaves.

[0034] Optionally, the walls of the rehumidification chamber 110 are made of heat-insulating and moisture-insulating materials to insulate the rehumidification chamber 110 from heat and moisture, so as to prevent the external environment from affecting the tobacco leaves inside.

[0035] In some embodiments, optionally, such as Figure 1 As shown, at least two return air ducts 140 include a first return air duct 142 and a second return air duct 144. The first return air duct 142 and the second return air duct 144 are located at the top of the opposite side walls of the rehumidification room body 110. The return air ducts 140 are arranged parallel to the supply air duct 130, and a plurality of return air branch pipes 150 are spaced apart along the axial direction of the return air ducts 140.

[0036] In this embodiment, the first return air duct 142 and the second return air duct 144 are respectively placed on the top of the two side walls of the humidification chamber 110, forming an airflow channel with the supply air duct 130. Moist, hot air is delivered from the supply air vent 132, penetrates the tobacco stack, and then flows back from the return air vents 152 on both sides.

[0037] The return air branch ducts are arranged at 150mm intervals along the axial direction, establishing a multi-layered return air channel in the vertical dimension. Discretizing the return air points allows air layers at different heights to participate in circulation simultaneously, avoiding temperature stratification in the vertical direction and ensuring uniform moisture absorption across all layers of the tobacco leaves. The dual-sided return air and central air supply form a pressure balance system, which can suppress the generation of unilateral eddies. The parallel duct scheme reduces local resistance losses, resulting in a more uniform overall airflow distribution.

[0038] In some embodiments, optionally, such as Figure 1As shown, the tobacco heating and humidification rehumidification chamber 100 also includes: a connecting pipe 146, which connects the first return air pipe 142 and the second return air pipe 144 to form a return air channel. The inner diameter of the return air channel decreases from the air inlet to the end along the airflow direction.

[0039] In this embodiment, the tobacco heating and humidification rehumidification chamber 100 also includes a connecting pipe 146, which connects the first return air pipe 142 and the second return air pipe 144 to form a return air channel. The return air channel is a tapered pipe, which utilizes the Venturi effect to create a self-pressurizing zone in the return air channel. As the cross-sectional area of ​​the pipe decreases, the air velocity naturally increases, forming a stronger negative pressure suction at the end of the channel, ensuring that the far-end return air branch pipe 150 can still efficiently draw in air, eliminating the end attenuation phenomenon of traditional equal-diameter pipe systems.

[0040] In some embodiments, optionally, such as Figure 4 As shown, there are multiple return air inlets 152, which are disposed on the outer peripheral wall of the return air branch pipe 150 and arranged at intervals along the axial direction of the return air branch pipe 150.

[0041] In this embodiment, multiple return air inlets 152 are arranged at intervals along the axial direction of the return air branch pipe 150 to form a multi-layer air intake zone in the vertical direction, ensuring that air layers at different heights can participate in circulation and eliminating the vertical temperature difference problem caused by traditional centralized return air.

[0042] The spaced-out return air inlets 152 can rectify the incoming airflow. Turbulent airflow is streamlined into laminar flow as it passes through the porous structure, improving the hydrodynamic efficiency of the circulation system.

[0043] In some embodiments, optionally, such as Figure 4 As shown, along the vertical direction, the aperture size of multiple return air inlets 152 decreases progressively from bottom to top.

[0044] In this embodiment, the aperture size of the multiple return air vents 152 gradually decreases from bottom to top, so that the air flows downward as much as possible to increase the flow range and prevent the tobacco leaves at the bottom from not being able to come into contact with the air.

[0045] In some embodiments, optionally, such as Figure 2 and Figure 3 As shown, multiple air outlets 132 are distributed on both sides of the bottom of the air supply duct 130, and the air outlet of each air outlet 132 is inclined downward toward the corresponding return air branch duct 150.

[0046] In this embodiment, the air supply outlets 132 are located on both sides of the bottom of the air duct, with the air outlet direction tilted downwards. Each air supply outlet 132 and the corresponding return air branch pipe 150 constitute an independent working unit, forming a local circulation chain of "supply-permeation-return", so that the humid and hot air can fully penetrate the tobacco stack and ensure the rehumidification effect of the tobacco.

[0047] In some embodiments, optionally, such as Figure 1 As shown, the tobacco heating and humidification rehumidification chamber 100 also includes: a first regulating valve 160, which is installed in the air inlet pipe 124 and is used to control the air inlet volume; and a second regulating valve 162, which is installed in the air outlet pipe 122 and is used to control the air outlet volume.

[0048] In this embodiment, the tobacco heating and humidification rehumidification chamber 100 further includes a first regulating valve 160 and a second regulating valve 162. The first regulating valve 160 controls the return air volume by changing its opening degree, while the second regulating valve 162 can be linked with the fan speed for control, adjusting the exhaust air intensity in real time based on the tobacco moisture content. During the humidification stage, it is fully open to ensure sufficient penetration of humid and hot air, while during the constant temperature stage, it is pulsated to maintain the stability of the flow field.

[0049] The first regulating valve 160 and the second regulating valve 162 work together to form an adaptive pressure regulation system. When the resistance of tobacco stacking changes, the system maintains static pressure balance by adjusting the intake and exhaust volumes, effectively preventing local overpressure or negative pressure problems.

[0050] In some embodiments, optionally, the tobacco heating and humidification rehumidification chamber 100 further includes: a plurality of humidity sensors, respectively disposed in the rehumidification chamber body 110, the heating and humidification device 120, the return air vent 152 and the air inlet 132, for detecting the humidity inside the rehumidification chamber body 110, the airflow humidity inside the heating and humidification device 120, the return air humidity and the supply air humidity; and a plurality of temperature sensors, respectively disposed in the rehumidification chamber body 110, the heating and humidification device 120, the return air vent 152 and the air inlet 132, for detecting the temperature inside the rehumidification chamber body 110, the airflow temperature inside the heating and humidification device 120, the return air temperature and the supply air temperature.

[0051] In this embodiment, the tobacco heating and humidification rehumidification chamber 100 also includes multiple humidity sensors and multiple temperature sensors. The humidity sensors employ capacitive sensing principles, enabling them to accurately capture changes in the moisture content of the air. The temperature sensors track ambient temperature fluctuations in real time through the thermistor effect. The output power of the heating and humidification device 120 can be dynamically adjusted based on the data collected by the humidity and temperature sensors. By installing temperature and humidity sensors in the rehumidification chamber 110, the heating and humidification device 120, the return air vent 152, and the air inlet 132, the heating and humidification output of the heating and humidification device 120 can be adjusted based on the temperature and humidity parameters within the rehumidification chamber 110 and the return air temperature and humidity parameters, thereby controlling the supply air temperature and humidity parameters and ultimately ensuring that the temperature and humidity within the rehumidification chamber 110 meet the set target values.

[0052] Furthermore, a safe temperature and humidity threshold range can be set, triggering an alarm system when the monitored values ​​exceed the critical point. Sensor data is transmitted wirelessly to the control system, forming data-driven intelligent control, improving the accuracy of temperature and humidity control, and promoting homogenized tobacco production.

[0053] In some embodiments, optionally, such as Figure 1 As shown, the tobacco heating and humidification rehumidification room 100 also includes: a fresh air duct 170, one end of which is connected to the air inlet duct 124, and the other end of which is connected to the outside; and a third regulating valve 172, which is installed in the fresh air duct 170 and is used to regulate the amount of fresh air introduced.

[0054] In this embodiment, the tobacco heating and humidification rehumidification chamber 100 also includes a fresh air duct 170 and a third regulating valve 172. The fresh air duct 170 is designed to directly connect to the outside, allowing fresh air to be periodically introduced to replace the stale air in the circulation system. When outside air is needed, the third regulating valve 172 is opened, and fresh air from outside enters the air inlet duct 124, is heated and humidified, and then enters the rehumidification chamber 110. By controlling the air exchange frequency through the third regulating valve 172, the CO2 concentration and volatile organic compound content can also be effectively adjusted to prevent quality deterioration caused by anaerobic respiration of the tobacco leaves.

[0055] By adjusting the fresh air ratio, the system temperature can be quickly regulated. For example, low-temperature fresh air can be introduced at night in summer to pre-cool the room, and warm air can be introduced at noon in winter to assist heating, reducing the energy consumption of mechanical temperature control.

[0056] In some embodiments, optionally, such as Figure 4 As shown, the return air duct 140 includes multiple connecting pipes 147 and multiple tee joints 148. Two adjacent connecting pipes 147 are respectively connected to two opposite ports of the tee joint 148, and the other port of the tee joint 148 is connected to the return air branch duct 150.

[0057] In this embodiment, the multi-section connecting pipe 147 and the return air branch pipe 150 are connected by a tee connector 148, which facilitates assembly and allows for quick isolation and replacement in case of a single branch pipe failure. During transportation, the connecting pipe 147, tee connector 148, and return air branch pipe 150 can be disassembled and packaged separately, and then reassembled during installation.

[0058] In specific embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the air supply duct 130 is connected to the air outlet duct 122. The air supply duct 130 is set on the top of the rehumidification room 110. During installation, the air supply duct 130 is suspended on the top of the rehumidification room 110 by a bracket. In this embodiment, the air supply duct 130 extends in the front-to-back direction as an example. In other embodiments, the air supply duct 130 may extend in other directions. Multiple air outlets 132 are evenly distributed on the outer periphery of the air supply duct 130. The air outlets 132 are distributed at intervals along the axial direction of the air supply duct 130.

[0059] Multiple air outlets 132 are distributed on the left and right sides of the bottom of the air supply duct 130. The air outlets 132 are inclined towards the left and right side walls of the rehumidification chamber 110, so that the heated and humidified air is blown from the center of the top of the rehumidification chamber 110 to the left and right sides through the air supply duct 130. When the tobacco leaves are stored through the storage racks 112, the storage racks 112 are distributed on the left and right sides of the air supply duct 130, so that the air can directly blow on the storage racks 112 on both sides to improve the heating and humidification efficiency.

[0060] Optionally, the air supply duct 130 is set on the center line of the top of the rehumidification chamber 110 so that the air on both sides is blown evenly and the air outlets 132 on the left and right sides are symmetrically distributed, so that the heating and humidification of the tobacco leaves on both sides are as consistent as possible.

[0061] The return air duct 140 is connected to the air inlet duct 124. There are two return air ducts 140. The two return air ducts 140 are located on the left and right sides around the air supply duct 130 and on the top of the opposite side walls of the rehumidification chamber 110. It can be understood that return air ducts 140 are provided on the top of the left and right sides of the rehumidification chamber 110, and the return air ducts 140 are arranged parallel to the air supply duct 130. The return air ducts 140 also extend in the front and back direction.

[0062] The return air duct 140 is connected to multiple return air branch ducts 150 extending downwards. The multiple return air branch ducts 150 are arranged at intervals in the front-to-back direction. The lower part of the return air branch duct 150 is provided with a return air inlet 152. Inside the rehumidification chamber 110, the air supply outlet 132 and the return air inlet 152 are arranged at intervals in the left-to-right direction and form a certain height difference. The air supply outlet 132 is located above the return air inlet 152. The air blown out of the air supply outlet 132 heats and humidifies the tobacco leaves, then flows downwards and is then recovered through the return air inlet 152. Under the suction of the return air inlet 152, the air flows from the middle to the left and right sides to achieve air circulation.

[0063] Multiple return air inlets 152 are provided, and the multiple return air inlets 152 are arranged at intervals along the axial direction of the return air branch pipe 150. The return air inlets 152 are located on the outer peripheral wall of the return air branch pipe 150, and the return air inlets 152 face one side of the center line of the rehumidification room 110. Air flows into the return air branch pipe 150 from the multiple return air inlets 152, thereby improving the return air effect.

[0064] The diameter of the multiple return air inlets 152 gradually increases from top to bottom along the return air branch pipe 150, with the diameter of the lower return air inlet 152 being larger than that of the upper return air inlet 152. This allows the air to flow downwards as much as possible, thereby increasing the range of airflow and preventing the tobacco leaves at the bottom from being unable to come into contact with the air, thus ensuring the rehumidification effect.

[0065] A connecting pipe 146 connects the first return air duct 142 and the second return air duct 144. The first return air duct 142 extends out of the rehumidification room 110 and connects to the air inlet duct 124. The two return air ducts 140 and the connecting pipe 146 form a main return air channel. The inner diameter of the main return air channel gradually decreases from the air inlet to the end, which can improve the return air capacity at the end and make the return air more uniform.

[0066] The operating principle of this rehumidification chamber is as follows: The storage rack 112 containing tobacco leaves is placed inside the rehumidification chamber body 110, such as... Figure 1 and Figure 2As shown, storage racks 112 are respectively positioned below the left and right sides of the air supply duct 130. Then, the heating and humidifying device 120 is activated to heat and humidify the air. The heated and humidified air enters the rehumidification chamber 110 through the air supply duct 130. The air is blown downwards from the top of the rehumidification chamber 110 through multiple air outlets 132 and flows to the left and right sides of the rehumidification chamber 110, heating and humidifying the tobacco leaves on the storage racks 112. Then, the air is recovered from multiple return air branch pipes 150 on the left and right sides of the rehumidification chamber 110. The air enters the return air branch pipes 150 from the lower return air inlet 152, is collected and returned to the heating and humidifying device 120 through the return air pipe 140, and is heated and humidified again to achieve circulation. When it is necessary to supplement the outside air, the third regulating valve 172 is opened, and the outside fresh air enters the air inlet pipe 124, is heated and humidified, and then enters the rehumidification chamber 110.

[0067] In summary, the tobacco leaf heating and humidification rehumidification chamber 100 provided in this application heats and humidifies the air through the heating and humidification device 120. The heated and humidified air enters the rehumidification chamber body 110 through the air supply duct 130 to heat and humidify the tobacco leaves. Then, it is collected and returned to the heating and humidification device 120 through the return air duct 140 for further heating and humidification, thus achieving circulation and reducing environmental pollution. Under the return air suction of multiple return air branch ducts 150, the air in the rehumidification chamber body 110 flows downwards from the center of the top to the left and right sides, improving the uniformity of airflow and the uniformity of heating and humidifying the tobacco leaves, meeting the production needs of large-scale tobacco leaf production.

[0068] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tobacco leaf heating and humidification rehumidification room, characterized in that, include: A dehumidification chamber is provided, and a storage rack is provided inside the dehumidification chamber for storing tobacco leaves; A heating and humidifying device is installed on the outside of the rehumidification room. The heating and humidifying device includes a fan assembly, an air outlet pipe and an air inlet pipe. The air outlet of the fan assembly faces the air outlet pipe and the air inlet of the fan assembly faces the air inlet pipe. An air supply duct is connected to the air outlet duct. The air supply duct is located at the top of the rehumidification room. The wall of the air supply duct is provided with multiple air outlets facing the storage rack. At least two return air ducts are respectively located on both sides of the supply air duct, and the storage rack is located between the return air duct and the supply air duct; Multiple return air branch pipes are connected to the return air duct, and the lower part of the return air branch pipe is provided with a return air inlet, which is connected to the air inlet duct.

2. The tobacco leaf heating and humidification rehumidification room according to claim 1, characterized in that, The at least two return air ducts include a first return air duct and a second return air duct. The first return air duct and the second return air duct are located at the top of the opposite side walls of the rehumidification room. The return air ducts are arranged parallel to the supply air ducts, and a plurality of return air branch ducts are spaced apart along the axial direction of the return air ducts.

3. The tobacco leaf heating and humidification rehumidification room according to claim 2, characterized in that, Also includes: A connecting pipe connects the first return air pipe and the second return air pipe to form a return air channel. The inner diameter of the return air channel decreases from the air inlet to the end along the airflow direction.

4. The tobacco leaf heating and humidification rehumidification room according to claim 1, characterized in that, The number of return air inlets is multiple, and the multiple return air inlets are disposed on the outer peripheral wall of the return air branch pipe and arranged at intervals along the axial direction of the return air branch pipe.

5. The tobacco leaf heating and humidification rehumidification room according to claim 4, characterized in that, Along the vertical direction, the aperture size of the multiple return air inlets decreases progressively from bottom to top.

6. The tobacco leaf heating and humidification rehumidification room according to claim 1, characterized in that, Multiple air outlets are distributed on both sides of the bottom of the air supply pipe, and the air outlet of each air outlet is inclined downward toward the corresponding return air branch pipe.

7. The tobacco leaf heating and humidification rehumidification room according to any one of claims 1 to 6, characterized in that, Also includes: A first regulating valve is installed in the air inlet pipe, and the first regulating valve is used to control the air intake volume; A second regulating valve is installed in the air outlet pipe, and the second regulating valve is used to control the air volume.

8. The tobacco leaf heating and humidification rehumidification room according to any one of claims 1 to 6, characterized in that, Also includes: Multiple humidity sensors are respectively installed in the rehumidification room, the heating and humidification device, the return air vent, and the supply air vent, and are used to detect the humidity inside the rehumidification room, the humidity of the airflow inside the heating and humidification device, the humidity of the return air, and the humidity of the supply air; Multiple temperature sensors are respectively installed in the rehumidification chamber, the heating and humidification device, the return air vent, and the supply air vent, and are used to detect the temperature inside the rehumidification chamber, the airflow temperature inside the heating and humidification device, the return air temperature, and the supply air temperature.

9. The tobacco leaf heating and humidification rehumidification room according to any one of claims 1 to 6, characterized in that, Also includes: A fresh air duct, one end of which is connected to the air inlet duct, and the other end of which is connected to the outside; The third regulating valve is installed in the fresh air duct and is used to regulate the amount of fresh air introduced.

10. The tobacco leaf heating and humidification rehumidification room according to any one of claims 1 to 6, characterized in that, The return air duct includes multiple connecting pipe sections and multiple tee joints. Two adjacent connecting pipe sections are respectively connected to two opposite ports of the tee joint, and the other port of the tee joint is connected to the return air branch pipe.

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