Bidirectional ventilation multifunctional tobacco leaf baking chamber

Abstract

The invention discloses a bidirectional ventilation multifunctional tobacco leaf baking chamber which is internally provided with a positive and negative rotation fan, and an upper group of vent holes and a lower group of vent holes are matched in the baking chamber, so that hot air can enter from the upper part and can also enter from the lower part, namely, the flowing direction of the hot air in the tobacco leaf baking chamber is reversible; and the flowing direction of the hot air can be repeatedly changed for multiple times, the temperatures of all positions in the box room are basically consistent by setting the preset conversion frequency, the maximum temperature difference is controlled within an ideal range, and therefore more tobacco leaves with good quality are obtained.

Description

Technical Field

[0001] The invention belongs to the field of tobacco leaf baking, and in particular relates to a two-way ventilated multifunctional tobacco leaf baking box room. Background Art

[0002] The internal space of traditional tobacco leaf drying rooms is standard and can generally hold three to four layers of tobacco leaves. In actual drying operations, since the hot air outlet is generally at the bottom, the temperature in the lower part of the room is actually higher than that in the upper part. As a result, the drying temperature and humidity environment of the upper and lower tobacco leaves are different, and the quality of the finally obtained dried tobacco leaves is also different. Only some tobacco leaves can reach the optimal state, while some tobacco leaves of insufficient quality can only be used barely. Returning them to the furnace for further drying will further increase the drying cost, which is not worth the loss.

[0003] In order to improve the baking quality of tobacco leaves, some people have proposed to set up multiple hot air outlets at different heights and adjust them in real time according to the monitored temperature. In actual work, it is found that this solution can indeed alleviate the problem of uneven temperature distribution in the box room, but the solution needs to be adjusted in real time according to the monitoring results and needs to be set based on the operator's experience. This also leads to the final baking result being not stable enough and cannot ensure that the tobacco leaves obtained from each baking are of good quality.

[0004] Based on this, the present invention has conducted an in-depth study on the traditional baking oven room, in the hope of designing a new tobacco baking oven room that can solve the above problems and ensure that the temperature at various locations in the baking oven room is basically consistent. Summary of the invention

[0005] In order to overcome the above-mentioned problems, the inventors have conducted intensive research and designed a multifunctional tobacco baking room with two-way ventilation, in which a forward and reverse fan is provided, and two sets of upper and lower ventilation holes are provided in the baking room, so that hot air can enter from both above and below, that is, the flow direction of hot air in the tobacco baking room is reversible, and the flow direction of hot air can be changed repeatedly. By setting a predetermined change frequency, the temperature in each place in the room is basically the same, and the maximum temperature difference is controlled within an ideal range, so as to obtain more high-quality tobacco leaves, thereby completing the present invention.

[0006] Specifically, the object of the present invention is to provide a multifunctional tobacco leaf baking oven room with two-way ventilation, the baking oven room comprising a baking room 1 and a temperature control cabin 2;

[0007] Wherein, ventilation holes connected to the temperature control chamber 2 are opened inside the baking room 1, and the ventilation holes include an upper ventilation hole 11 located at the top and a lower ventilation hole 12 located at the bottom;

[0008] Dehumidification holes connected to the outside through dehumidification pipes 3 are also provided inside the drying room 1, and the dehumidification holes include an upper dehumidification hole 13 located at the top and a lower dehumidification hole 14 located at the bottom;

[0009] A fan 4 and a heat exchanger 5 are provided in the temperature control chamber 2. The heat exchanger 5 is connected to an external heat source 6 to heat the air in the temperature control chamber 2.

[0010] The fan 4 is a forward and reverse fan, which controls the air flow direction between the baking room 1 and the temperature control chamber 2, that is, controls the air intake from the top or the bottom of the baking room 1;

[0011] The air inlet above the baking room 1 is the air in the temperature control chamber 2 entering the baking room 1 through the upper ventilation hole 11, and after circulating in the baking room 1 for one cycle, it flows back to the temperature control chamber 2 through the lower ventilation hole 12;

[0012] The air inlet below the baking room 1 is the air in the temperature control chamber 2 that enters the baking room 1 through the lower ventilation holes 12 , circulates in the baking room 1 for one cycle, and then flows back to the temperature control chamber 2 through the upper ventilation holes 11 .

[0013] The heat exchanger 5 includes a plurality of metal heat dissipation plates 51 vertically arranged side by side, and a plurality of metal pipes 52 penetrating the metal heat dissipation plates 51 . The metal pipes 52 are connected to the external heat source 6 through pipelines.

[0014] In the wall surface of the temperature control chamber 2, air intake louvers are provided, and the air intake louvers include an upper air intake louver 21 located at the top and a lower air intake louver 22 located at the bottom;

[0015] Air is added to the temperature-controlled cabin 2 by controlling the opening of the air inlet shutters.

[0016] Dehumidification louvers are provided at the outlet of the dehumidification pipe 3 , wherein the upper dehumidification louver 81 is connected to the upper dehumidification hole 13 , and the lower dehumidification louver 82 is connected to the lower dehumidification hole 14 .

[0017] The baking oven room further comprises a control system, through which the upper dehumidification louver 81 and the upper air intake louver 21 are controlled to be opened synchronously, or the lower dehumidification louver 82 and the lower air intake louver 22 are controlled to be opened synchronously.

[0018] When air is introduced from the top of the baking room 1, if dehumidification is required, the lower dehumidification louver 82 and the lower air intake louver 22 are opened synchronously;

[0019] When air is introduced from the bottom of the baking room 1, if dehumidification is required, the upper dehumidification louver 81 and the upper air intake louver 21 are opened synchronously.

[0020] Among them, the baking oven room is also provided with a waste heat recovery system, which starts working during dehumidification;

[0021] Through the waste heat recovery system, the dehumidification pipe 3 preheats the air entering the temperature control chamber 2 through the air inlet louver, thereby recovering the heat in the dehumidification pipe 3.

[0022] The waste heat recovery system includes an air cavity 92 formed by the outer shell 91, one end of the air cavity 92 is connected to the air inlet louver, and the other end of the air cavity 92 is open and connected to the temperature control chamber 2;

[0023] The dehumidification pipe 3 passes through the air cavity 92 in parallel, thereby exchanging heat with the gas in the air cavity 92 .

[0024] A dehumidification buffer chamber 23 is provided in the temperature control chamber 2, the dehumidification hole is opened on the wall surface of one side of the dehumidification buffer chamber 23, and a plurality of through holes connected to the dehumidification pipe 3 are densely arranged on the wall surface of the other side of the dehumidification buffer chamber 23;

[0025] The moisture in the baking room 1 enters the dehumidification buffer chamber 23 through the dehumidification holes, and is then discharged to the outside of the baking room through the dehumidification pipe 3 and the dehumidification louver.

[0026] Wherein, fins 31 extending inwards are arranged on the inner wall of the dehumidification pipe 3 .

[0027] The beneficial effects of the present invention include:

[0028] (1) According to the multifunctional tobacco leaf baking oven with two-way ventilation provided by the present invention, hot air in the baking oven enters the baking oven alternately from the upper and lower air inlet holes, so that the temperature in each part of the baking oven is basically the same, thereby ensuring the baking quality and baking efficiency of tobacco leaves;

[0029] (2) According to the multifunctional tobacco leaf baking oven with two-way ventilation provided by the present invention, the heat exchanger in the baking oven includes a plurality of densely arranged metal heat sinks. After the metal heat sinks are heated by the heat source, the air in the temperature control chamber is heated when it flows through the gaps between the metal heat sinks under the drive of the fan. Such a heat exchanger structure enables the leaf baking oven to adapt to various forms of heat sources and has a wider range of applications.

[0030] (3) According to the multifunctional tobacco leaf baking box with two-way ventilation provided by the present invention, the box is also provided with a waste heat recovery system, which can absorb the heat carried in the moisture, thereby improving the overall utilization rate of thermal energy and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram showing the overall structure of the exterior of the multifunctional tobacco leaf drying oven room with two-way ventilation of the present application;

[0032] Figure 2 A cross-sectional view of the multifunctional tobacco leaf drying oven room with two-way ventilation of the present application is shown;

[0033] Figure 3 Another cross-sectional view showing the multifunctional tobacco leaf drying oven room with two-way ventilation of the present application;

[0034] Figure 4 A schematic diagram showing the structure of a heat exchanger of a multifunctional tobacco leaf drying oven room with two-way ventilation of the present application is shown;

[0035] Figure 5 The overall structural diagram of the present invention is a schematic diagram showing a waste heat recovery system provided in a multifunctional tobacco leaf drying oven room with two-way ventilation;

[0036] Figure 6 Show Figure 5 A cross-sectional view of

[0037] Figure 7 Show Figure 6 A partial enlarged view of the lower middle area;

[0038] Figure 8 Show Figure 6 A partial enlarged view of the upper-middle area;

[0039] Fig. 9 A schematic diagram showing the structure of a dehumidification pipe in a multifunctional tobacco leaf drying oven room with two-way ventilation of the present application is shown.

[0040] Description of Reference Numerals

[0041] 1- Baking room

[0042] 11-Upper vent

[0043] 12-Lower vents

[0044] 13-Upper moisture drainage hole

[0045] 14-Lower moisture drainage hole

[0046] 15-Observation window

[0047] 2- Temperature Control Cabin

[0048] 21-Upper air intake shutter

[0049] 22-Lower air intake shutter

[0050] 23-Dehumidification buffer chamber

[0051] 24-Inspection port

[0052] 3-Dehumidification pipe

[0053] 31-Fin

[0054] 4-Blower

[0055] 5-Heat exchanger

[0056] 51-Metal heat sink

[0057] 52-Metal pipe

[0058] 6-Heat source

[0059] 7-Electric heater

[0060] 81-Upper moisture venting shutter

[0061] 82-Lower moisture venting shutter

[0062] 91-Shell

[0063] 92-Air cavity DETAILED DESCRIPTION

[0064] The present invention will be further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become more clear and distinct.

[0065] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0066] The present invention provides a multifunctional tobacco leaf baking oven room with two-way ventilation, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in , the baking oven room includes a baking room 1 and a temperature control cabin 2;

[0067] Among them, ventilation holes connected with the temperature control cabin 2 are opened inside the baking room 1, and the ventilation holes include upper ventilation holes 11 located at the top and lower ventilation holes 12 located at the bottom; in the present application, due to the small overall size of the temperature control cabin 2, the ventilation holes are not directly connected with the temperature control cabin 2. For this reason, air ducts connected to each other are arranged on the temperature control cabin 2 and the baking room 1. Such a structural design can reduce the overall volume of the baking box room and save material costs. More importantly, it makes the circulating air duct driven by the fan relatively smaller, so that the temperature regulation of the baking box room is more sensitive and the heating speed is faster.

[0068] Dehumidification holes connected to the outside through dehumidification pipes 3 are also provided inside the curing room 1, and the dehumidification holes include an upper dehumidification hole 13 located at the top and a lower dehumidification hole 14 located at the bottom; preferably, the upper dehumidification hole 13 is arranged side by side with the upper ventilation hole 11, and the lower dehumidification hole 14 is arranged side by side with the lower ventilation hole 12. When the waste heat recovery system is not provided, the dehumidification pipe 3 can be a straight pipe with a larger diameter, and each dehumidification hole corresponds to a dehumidification pipe 3.

[0069] A fan 4 and a heat exchanger 5 are provided in the temperature control chamber 2. The heat exchanger 5 is connected to an external heat source 6 to heat the air in the temperature control chamber 2.

[0070] The fan 4 is a forward and reverse fan, which controls the air flow direction between the baking room 1 and the temperature control chamber 2, that is, controls the air intake from the top or the bottom of the baking room 1;

[0071] The air inlet above the baking room 1 is the air in the temperature control chamber 2 entering the baking room 1 through the upper ventilation hole 11, and after circulating in the baking room 1 for one cycle, it flows back to the temperature control chamber 2 through the lower ventilation hole 12;

[0072] The air inlet below the baking room 1 is the air in the temperature control chamber 2 that enters the baking room 1 through the lower ventilation holes 12 , circulates in the baking room 1 for one cycle, and then flows back to the temperature control chamber 2 through the upper ventilation holes 11 .

[0073] The heat source 6 described in the present application can be any device that can generate heat, such as a boiler, an air conditioner, a plasma air compressor, etc. The heat exchanger 5 is connected to the heat source through a heat transfer medium, which can be a liquid or a gas.

[0074] Preferably, tobacco leaves to be cured are hung in the curing room 1; a horizontal hanging rod is provided in the curing room 1, which can be used to hang bunches of tobacco leaves for curing. A plurality of sensors are provided on the hanging rod, and the sensors can measure temperature and humidity in real time. The plurality of sensors are connected to the overall control system of the curing room to obtain the temperature and humidity conditions at various places in the curing room in real time, so as to adjust the curing strategy based on the current curing stage and curing status.

[0075] The wall with ventilation holes and moisture-discharging holes is the inner wall of the baking room, and the wall opposite to it is the outer wall. The outer wall is provided with a door for entering and exiting the baking room, or the outer wall as a whole is the door for entering and exiting the baking room. Preferably, a heat-insulating layer is laid on the wall of the baking room 1 to reduce radiation heat dissipation and improve the utilization rate of heat energy.

[0076] Preferably, observation windows 15 are provided on the inner wall surface on both sides of the temperature control chamber, and the observation windows 15 are glass windows, through which the current state of the tobacco leaves in the curing room, such as the degree of curl, color, etc., can be observed from the outside, so as to adjust the baking parameters accordingly.

[0077] In a preferred embodiment, the heat exchanger 5 includes a plurality of metal heat sinks 51 arranged vertically side by side, preferably aluminum plates, which have good heat transfer efficiency, are relatively light, easy to install and use, and have a relatively low cost; it also includes a plurality of metal tubes 52 passing through the metal heat sinks 51, which are preferably copper tubes. The metal tubes 52 are connected to the external heat source 6 through a pipeline, which can be a hose made of a polymer material that can stably transfer the heat transfer medium; hoses are provided at both ends of the metal tube, and the hoses are connected to the heat source, so that the heat transfer medium flows into the metal tube from one side and flows back to the heat source from the other side, thereby continuously supplying heat.

[0078] An electric heater 7 is also provided in the temperature control cabin 2, which is used as a backup heat source to ensure that the temperature in the curing room 1 will not change suddenly due to a fault, and to ensure that the tobacco leaves in the curing room can complete basic curing operations under extreme circumstances to avoid losses to farmers.

[0079] In a preferred embodiment, air intake louvers are provided on the wall surface of the temperature control chamber 2, and the air intake louvers include an upper air intake louver 21 located at the top and a lower air intake louver 22 located at the bottom;

[0080] Air is added to the temperature-controlled cabin 2 by controlling the opening of the air inlet shutters.

[0081] Dehumidification louvers are provided at the outlet of the dehumidification pipe 3, wherein the upper dehumidification louver 81 is connected to the upper dehumidification hole 13, and the lower dehumidification louver 82 is connected to the lower dehumidification hole 14. Under normal conditions, the above-mentioned louvers are in a closed state, so that the inside and outside of the baking oven are isolated, and the air inside the baking oven circulates, so as to maintain a higher baking temperature in the baking oven 1.

[0082] Preferably, an inspection port 24 is also provided on the temperature-controlled chamber 2, so that maintenance personnel can enter the temperature-controlled chamber 2 to inspect and maintain components such as motors.

[0083] The baking oven also includes a control system, through which the upper dehumidification louver 81 is controlled to open synchronously with the upper air intake louver 21, or the lower dehumidification louver 82 is controlled to open synchronously with the lower air intake louver 22. By controlling the synchronous opening of the above louvers through the control system, it is possible to ensure that the intake and exhaust are balanced, and it is also possible to ensure that the newly injected air from the outside will definitely flow through the heat exchanger before entering the baking room 1, so as to prevent the outside air with too low temperature from affecting the baking quality of tobacco leaves in the baking room.

[0084] Preferably, when air is introduced from the top of the curing room 1, if dehumidification is required, the lower dehumidification louver 82 and the lower air intake louver 22 are opened synchronously; when air is introduced from the bottom of the curing room 1, if dehumidification is required, the upper dehumidification louver 81 and the upper air intake louver 21 are opened synchronously. This arrangement makes it unnecessary to provide additional power for the dehumidification operation, and the air flow in the curing room 1 will naturally cause part of the air to enter the dehumidification pipe through the dehumidification hole and then be discharged to the outside.

[0085] Preferably, the fan 4 includes a high-speed gear and a low-speed gear. When the humidity of the gas in the baking room 1 does not reach the set value, the fan 4 starts the low-speed gear and all the shutters are in a closed state; when the humidity of the gas in the baking room 1 reaches the set value, the fan 4 starts the high-speed gear and synchronously opens a group of dehumidification shutters and air intake shutters.

[0086] In a preferred embodiment, Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in , the baking oven room is also provided with a waste heat recovery system, which starts working during dehumidification;

[0087] Through the waste heat recovery system, the dehumidification pipe 3 preheats the air entering the temperature control chamber 2 through the air inlet louver, thereby recovering the heat in the dehumidification pipe 3.

[0088] Preferably, the waste heat recovery system comprises an air cavity 92 formed by covering the outer shell 91, one end of the air cavity 92 is connected to the air inlet louver, and the other end of the air cavity 92 is open and connected to the temperature control cabin 2;

[0089] The dehumidification pipe 3 passes through the air cavity 92 in parallel, thereby exchanging heat with the gas in the air cavity 92. The outside air enters the air cavity 92 through the air inlet louver, fully contacts the dehumidification pipe 3 in the air cavity 92, absorbs the heat from the dehumidification pipe 3, is preheated, and then enters the temperature control chamber 2, passes through the heat exchanger 5, and enters the baking room 1.

[0090] Preferably, a dehumidification buffer chamber 23 is provided in the temperature control chamber 2, the dehumidification hole is opened on the wall surface of one side of the dehumidification buffer chamber 23, and a plurality of through holes connected to the dehumidification pipe 3 are densely arranged on the wall surface of the other side of the dehumidification buffer chamber 23;

[0091] The moisture in the baking room 1 enters the moisture removal buffer chamber 23 through the moisture removal hole, and then is discharged to the outside of the baking room through the moisture removal pipe 3 and the moisture removal shutter. In the present application, by setting the buffer chamber 23, the distribution of the humid air in each moisture removal pipe 3 is basically uniform, thereby improving the heat exchange efficiency.

[0092] In a preferred embodiment, Fig. 9As shown in FIG. 1 , fins 31 extending inwardly are arranged on the inner wall of the moisture dehumidification pipe 3 .

[0093] The inner diameter of the dehumidification pipe 3 is 5-8 cm, preferably 6 cm, the height of the fin 31 is 0.8-1.2 cm, preferably 0.9 cm, 12-16 fins are arranged on each dehumidification pipe, preferably 14 fins, and the fins are evenly distributed on the inner wall of the dehumidification pipe.

[0094] The inventors have found that when the baking oven is in the same dehumidification stage, when the dehumidification pipe and its fins are set to the above-mentioned dimensions, the outlet air temperature at the outlet of the dehumidification pipe is the lowest; that is, if only the number and size of the fins are changed, the outlet air temperature at the outlet of the dehumidification pipe will increase, resulting in a decrease in the thermal energy utilization efficiency.

[0095] Example

[0096] Choose Figure 5 , Figure 6 , Figure 7 and Figure 8 The multifunctional tobacco leaf drying box room with two-way ventilation shown in the figure is used to dry fresh tobacco leaves, which are upper tobacco leaves. In the drying box room, 4 layers of hanging rods are arranged in the drying box room, with a total of 410 tobacco rods, and an average of 13 kg of fresh tobacco leaves per rod.

[0097] During the baking process, the state of tobacco leaves in the baking room is observed in real time through the observation window, the temperature and humidity in the baking room are adjusted, and the switching time of the fan forward and reverse rotation is set to 3 minutes to ensure that the temperature at each height layer is basically consistent;

[0098] The baking operation lasted for 187 hours. When the temperature in the baking room cooled down to close to the outdoor temperature, the baking room was opened, and the dried tobacco leaves were checked and weighed. The average weight of the dried tobacco leaves on each tobacco rod was 1.66 kg.

[0099] During the entire baking process, 1,265 kWh of electricity was consumed, with an electricity price of 0.452 yuan per kWh; the total cost was 571.78 yuan; and the cost of baking dry tobacco leaves was 0.84 yuan per kilogram.

[0100] Comparative Example

[0101] Select fresh tobacco leaves of the same quality as in the implementation, and also select upper tobacco leaves. Four layers of hanging rods are arranged in the drying oven room, with a total of four layers of tobacco leaves hanging on them. The number of tobacco rods loaded is 452, with an average of 11.1 kg of fresh tobacco leaves per rod. Biomass briquettes are used as fuel, and the drying is continued for 190 hours. When the temperature in the drying room cools down to close to the outdoor temperature, the drying room is opened, and the dried tobacco leaves obtained are checked and weighed. The average weight of the dried tobacco leaves on each loaded tobacco rod is 1.09 kg.

[0102] During the entire baking process, 1.42 tons of fuel were consumed at a price of 850 yuan / ton, and 477 kWh of electricity was consumed at a price of 0.452 yuan / kWh; the total cost was 1,422.6 yuan; the cost of baking dry tobacco leaves was 2.89 yuan / kg.

[0103] It can be seen from the above embodiments and comparative examples that the multifunctional tobacco baking oven with two-way ventilation provided in the present application can significantly reduce baking costs and shorten baking time.

[0104] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. A multifunctional tobacco leaf baking chamber with two-way ventilation, characterized in that: The baking oven room comprises a baking room (1) and a temperature control cabin (2); Wherein, ventilation holes communicating with the temperature control chamber (2) are provided inside the baking room (1), and the ventilation holes include an upper ventilation hole (11) located at the top and a lower ventilation hole (12) located at the bottom; A dehumidification hole connected to the outside through a dehumidification pipe (3) is also provided inside the drying room (1), and the dehumidification hole comprises an upper dehumidification hole (13) located at the top and a lower dehumidification hole (14) located at the bottom; A fan (4) and a heat exchanger (5) are provided in the temperature-controlled chamber (2). The heat exchanger (5) is connected to an external heat source (6) to heat the air in the temperature-controlled chamber (2). The fan (4) is a forward and reverse rotating fan, and the air flow direction between the baking room (1) and the temperature control chamber (2) is controlled by the fan (4), that is, the air intake from the top or the bottom of the baking room (1) is controlled; The air inlet above the baking room (1) is the air in the temperature control chamber (2), which enters the baking room (1) through the upper ventilation hole (11), circulates in the baking room (1) for one cycle, and then flows back to the temperature control chamber (2) through the lower ventilation hole (12); The air inlet below the baking room (1) is the air in the temperature control chamber (2), which enters the baking room (1) through the lower ventilation hole (12), circulates in the baking room (1) for one cycle, and then flows back to the temperature control chamber (2) through the upper ventilation hole (11).

2. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 1 is characterized in that: The heat exchanger (5) comprises a plurality of metal heat dissipation plates (51) arranged vertically side by side, and also comprises a plurality of metal pipes (52) penetrating the metal heat dissipation plates (51), wherein the metal pipes (52) are connected to an external heat source (6) via a pipeline.

3. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 1 is characterized in that: Air intake louvers are provided on the wall surface of the temperature control chamber (2), and the air intake louvers include an upper air intake louver (21) located at the top and a lower air intake louver (22) located at the bottom; Air is added to the temperature-controlled chamber (2) by controlling the opening of the air inlet shutter.

4. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 3 is characterized in that: A dehumidification louver is provided at the outlet of the dehumidification pipe (3), wherein the upper dehumidification louver (81) is connected to the upper dehumidification hole (13), and the lower dehumidification louver (82) is connected to the lower dehumidification hole (14).

5. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 4 is characterized in that: The baking oven room also includes a control system, through which the upper dehumidification louver (81) and the upper air intake louver (21) are controlled to open synchronously, or the lower dehumidification louver (82) and the lower air intake louver (22) are controlled to open synchronously.

6. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 5 is characterized in that: When air is introduced from the top of the baking room (1), if dehumidification is required, the lower dehumidification louver (82) and the lower air intake louver (22) are opened synchronously; When air is introduced from the bottom of the baking room (1), if dehumidification is required, the upper dehumidification louver (81) and the upper air intake louver (21) are opened synchronously.

7. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 6 is characterized in that: The baking oven room is also provided with a waste heat recovery system, which starts working during dehumidification; Through the waste heat recovery system, the dehumidification pipe (3) preheats the air entering the temperature control chamber (2) through the air inlet louver, thereby recovering the heat in the dehumidification pipe (3).

8. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 7, characterized in that: The waste heat recovery system comprises an air cavity (92) formed by covering the outer shell (91), one end of the air cavity (92) is connected to the air inlet louver, and the other end of the air cavity (92) is open and connected to the temperature control chamber (2); The dehumidification pipe (3) passes through the air cavity (92) in parallel, thereby exchanging heat with the gas in the air cavity (92).

9. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 8, characterized in that: A dehumidification buffer chamber (23) is provided in the temperature control chamber (2), the dehumidification hole is provided on the wall surface of one side of the dehumidification buffer chamber (23), and a plurality of through holes connected to the dehumidification pipe (3) are densely arranged on the wall surface of the other side of the dehumidification buffer chamber (23); The moisture in the baking room (1) enters the moisture removal buffer chamber (23) through the moisture removal holes, and is then discharged to the outside of the baking room through the moisture removal pipe (3) and the moisture removal louver.

10. The multifunctional tobacco leaf drying oven room with two-way ventilation according to claim 8, characterized in that: Fins (31) extending inwards are arranged on the inner wall of the moisture dehumidification pipe (3).

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