Wet and hot air outlet and fresh air inlet self-adaptive adjusting system of drying system

Abstract

The invention relates to the technical field of temperature and humidity adjustment of drying boxes, in particular to a damp and hot air outlet and fresh air inlet self-adaptive adjusting system of a drying system. Comprising an air outlet cover arranged at the top end of a drying box and communicated with the interior of the drying box, a dehumidification fan is arranged at the top end of the air outlet cover, a connecting box body is arranged between the air outlet cover and the dehumidification fan, a heat exchange fresh air opening and a direct supplement fresh air opening are formed in the front side face of the connecting box body, and air return assemblies communicated with the interior of the drying box are arranged on the left side and the right side of the connecting box body. Heat exchange core bodies distributed corresponding to the heat exchange fresh air openings are arranged in the connecting box body, and heat exchange air supplement pipes are arranged at the bottom ends of the heat exchange core bodies. Slope guide plates symmetrically distributed on the left side face and the right side face of the heat exchange core body are arranged in the connecting box body, and overflowing gaps are formed between the top ends of the slope guide plates and the top wall of the connecting box body. Self-adaptive adjustment, accurate temperature control and dehumidification, efficient heat exchange, energy conservation and drying quality and efficiency improvement are achieved, and specifically, airflow regulation and control, energy recovery and stable operation are achieved through cooperation of multiple structures.

Description

Technical Field

[0001] The invention relates to the technical field of temperature and humidity regulation of drying boxes, and in particular to a drying system self-adaptive regulation system for hot and humid air outlet and fresh air intake. Background Art

[0002] In the field of drying operations, performance optimization and energy saving of drying systems have always been the core issues of concern to the industry. During the operation of traditional drying systems, there are often problems with the introduction of fresh air and the inflexible control of temperature and humidity in the drying box.

[0003] On the one hand, most traditional systems only have a single fresh air outlet for the introduction of fresh air, and cannot make targeted adjustments based on the actual temperature and humidity conditions in the drying box. During the preheating of the drying box and the initial entry of materials, it is impossible to accurately control the timing and amount of fresh air entering, which can easily lead to energy waste or poor drying results. At the same time, when the temperature in the drying box is unbalanced or too high, it is difficult for traditional systems to quickly and effectively introduce fresh air for temperature adjustment, affecting the drying quality and efficiency.

[0004] On the other hand, the traditional system lacks efficient structural design in terms of exhausting the hot and humid air in the drying box and recycling energy. The hot and humid air is directly discharged, and a large amount of heat energy is lost, resulting in a huge waste of energy and increasing the drying cost. Moreover, in terms of air volume adjustment, the traditional system lacks flexibility and is difficult to adapt to the needs of different drying stages and material characteristics, affecting the stability and adaptability of the overall drying process.

[0005] In addition, in terms of airflow organization and distribution in the drying system, the traditional system has problems such as uneven airflow distribution and unreasonable flow path. After the fresh air enters the drying box, it cannot fully exchange heat with the hot and humid air, resulting in low heat exchange efficiency and large airflow fluctuations inside the system, affecting the stability and reliability of the drying system. At the same time, the layout and structural design of the various components of the traditional system lack systematicity and integration, which brings many inconveniences to the maintenance, upgrade and transformation of the system.

[0006] In summary, the existing drying system has many deficiencies in the adaptive adjustment of the outlet of moist hot air and the intake of fresh air, and it is difficult to meet the requirements of modern drying operations for high efficiency, energy saving, stability and flexibility. Summary of the invention

[0007] The present invention provides a drying system for adaptively regulating the outlet of moist hot air and the inlet of fresh air, so as to solve the technical problems in the prior art that the adaptive regulation capability of the drying box is poor and cannot meet the requirements of modern drying operations for high efficiency, energy saving, stability and flexibility.

[0008] In order to solve the above problems, the present invention provides a drying system for outputting hot and humid air and inletting fresh air adaptively adjusting the system, which adopts the following technical solutions: It includes an air outlet hood provided at the top of the drying box and communicating with the inside of the drying box. A dehumidifying fan is provided at the top of the air outlet hood. A connecting box body is provided between the air outlet hood and the dehumidifying fan. A heat exchange fresh air inlet and a direct supply fresh air inlet are provided on the front side of the connecting box body. Return air components communicating with the inside of the drying box are provided on both the left and right sides of the connecting box body.

[0009] A heat exchange core body corresponding to the heat exchange fresh air inlet is provided in the connecting box body. The heat exchange core body includes continuous curved plates arranged at intervals from front to back. A heat exchange supply air duct is provided at the bottom end of the continuous curved plate. Air outlet holes corresponding to the spaces between adjacent continuous curved plates are provided on the top wall of the heat exchange supply air duct. One end of the heat exchange supply air duct points to the heat exchange fresh air inlet and the end pointing to the heat exchange fresh air inlet is an open end.

[0010] Inclined guide plates symmetrically distributed on the left and right side surfaces of the heat exchange core body are provided in the connecting box body. An air flow gap is formed between the top end of the inclined guide plate and the top wall of the connecting box body. After the fresh air entering from the heat exchange fresh air inlet enters the heat exchange supply air duct and then enters the space between the continuous curved plates for heat exchange, it enters the return air component through the air flow gap under the guiding action of the inclined guide plate.

[0011] Furthermore, a baffle plate is provided at the top end of the heat exchange core body. Air outlet grooves corresponding to the spaces between adjacent continuous curved plates are provided on the baffle plate.

[0012] Furthermore, a bracket for installing the heat exchange core body is provided in the connecting box body. A wing plate for detachably connecting with the bracket is provided at the bottom end of the heat exchange core body. A dehumidifying box is detachably provided below the heat exchange core body.

[0013] Furthermore, a cover plate is vertically slidably provided at the heat exchange fresh air inlet. A first power component for driving the cover plate to move vertically back and forth is provided on the connecting box body. The heat exchange fresh air inlet is opened or closed during the vertical reciprocating movement of the cover plate.

[0014] Furthermore, an air volume regulating valve is provided at the direct supply fresh air inlet. A moving plate is provided on the outer end surface of the air volume regulating valve. A telescopic component for driving the moving plate to move is provided on the connecting box body. The port of the air volume regulating valve is closed or opened during the movement of the moving plate.

[0015] Furthermore, a ventilation duct opposite to the direct supply fresh air inlet is provided in the connecting box body. The bracket is formed at the top end of the ventilation duct. Uniform air ducts arranged in an array are provided in the ventilation duct. One end of the uniform air duct is communicated with the air volume regulating valve and the other end is communicated with the return air component.

[0016] Furthermore, the return air assembly includes an upper return air connection port communicating with the connection box body and a lower return air connection port communicating with the interior of the drying box. A fresh air fan is communicatively provided between the upper return air connection port and the lower return air connection port.

[0017] Furthermore, an adjusting plate for adjusting the air volume is provided inside the air outlet hood. The cross-section of the adjusting plate is V-shaped. The adjusting plate is rotationally supported inside the air outlet hood through a rotating shaft, and one end of the rotating shaft is provided with a motor for driving its rotation.

[0018] The beneficial effects of a system for adaptively adjusting the discharge of hot and humid air and the intake of fresh air in a drying system provided by the present invention are as follows: 1. In the present invention, through the design of the continuous curved plate, the heat exchange supplementary air duct, and the air outlet holes in the heat exchange core body, the contact area and the flow path between the fresh air and the hot and humid air are increased, the heat exchange time is extended, the heat exchange efficiency is significantly improved, the effective recovery and utilization of energy are realized, and the drying energy consumption is reduced.

[0019] The inclined guide plates are symmetrically arranged on the left and right side surfaces of the heat exchange core body. Through the guiding effect, the fresh air is forced to pass through the heat exchange core body from bottom to top, increasing the residence time of the fresh air in the heat exchange core body and the contact area with the hot and humid air, and at the same time reducing the air flow fluctuation in the heat exchange core body.

[0020] The flow-through gap formed between the top end of the inclined guide plate and the top wall of the connection box body provides a clear outflow channel for the fresh air after heat exchange, ensuring the orderly flow of the air flow. In addition, the inclined guide plate and the heat exchange core body cooperate with each other to reduce the air flow fluctuation in the heat exchange core body, improving the stability and reliability of the system.

[0021] 2. In the present invention, the design of the heat exchange fresh air inlet and the direct supplementary fresh air inlet provides two different fresh air introduction methods, which can be flexibly selected according to the drying requirements and actual conditions. Specifically, during preheating and when the first batch of materials just enters, the dehumidification fan does not work. At this time, it is possible to select whether to open the heat exchange fresh air inlet or the direct supplementary fresh air inlet according to the needs to meet different drying requirements, further enhancing the adaptive adjustment ability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By referring to the accompanying drawings and reading the detailed description below, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understood. In the drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 is one of the structural schematic diagrams of the present invention; Figure 2 is the second structural schematic diagram of the present invention; Figure 3Schematic diagram of the internal structure of the present invention; Figure 4 One of the schematic diagrams of the structure of the heat exchange core in the present invention; Figure 5 Another schematic diagram of the structure of the heat exchange core in the present invention.

[0023] Explanation of reference numerals in the drawings: 1. Air outlet hood; 11. Adjusting plate; 2. Dehumidifying fan; 3. Connecting box; 31. Fresh air inlet for heat exchange; 311. Cover plate; 32. Direct supply fresh air inlet; 321. Air volume regulating valve; 322. Moving plate; 33. Heat exchange core; 331. Continuous curved plate; 332. Heat exchange air supply pipe; 3321. Air outlet hole; 333. Baffle plate; 3331. Air outlet groove; 334. Flank plate; 34. Inclined guide plate; 35. Flow-through gap; 36. First power component; 37. Bracket; 38. Telescopic component; 39. Ventilation duct; 391. Air distribution duct; 4. Return air assembly; 41. Upper return air connection port; 42. Lower return air connection port; 43. Fresh air fan; 5. Dehumidifying box. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0025] The number of any element in the drawings is for illustration rather than limitation, and any naming is only for distinction and does not have any limiting meaning.

[0026] Next, the principles and spirits of the present invention will be elaborated in detail with reference to several representative embodiments of the present invention.

[0027] An embodiment of an adaptive adjustment system for discharging hot and humid air and introducing fresh air in a drying system provided by the present invention: As Figures 1 to 5 shown, It includes an air outlet hood 1 provided at the top of the drying box and communicating with the inside of the drying box. A dehumidifying fan 2 is provided at the top of the air outlet hood 1. A connecting box 3 is provided between the air outlet hood 1 and the dehumidifying fan 2. A fresh air inlet for heat exchange 31 and a direct supply fresh air inlet 32 are provided on the front side of the connecting box 3. Return air assemblies 4 communicating with the inside of the drying box are provided on both the left and right sides of the connecting box 3.

[0028] In this embodiment, a temperature sensor and a humidity sensor are provided inside the drying box. The temperature sensor and the humidity sensor feedback the collected information to the processor. The dehumidifying fan 2 is a variable-frequency fan, and the processor adjusts the operation of the dehumidifying fan 2 according to the change values of temperature and humidity.

[0029] Among them, when the drying box is preheating and the first batch of materials just enter, the dehumidifying fan 2 does not operate.

[0030] Specifically, there are two fresh air inlets. The heat exchange fresh air inlet 31 will heat the air before it enters the drying box. When the temperature in the drying box is unbalanced or too high, the air is directly introduced into the drying box from the direct supply fresh air inlet 32 to balance the overall temperature in the drying box.

[0031] Among them, an adjusting plate 11 for adjusting the air volume is provided inside the air outlet hood 1. The cross-section of the adjusting plate 11 is V-shaped. The adjusting plate 11 is rotationally supported inside the air outlet hood 1 through a rotating shaft, and one end of the rotating shaft is provided with a motor for driving its rotation.

[0032] The humid and hot air inside the drying box is discharged through the dehumidifying fan 2 after passing through the air outlet hood 1. The adjusting plate 11 can assist in adjusting the air outlet volume, improving the flexibility and adaptability of the overall structure.

[0033] In this embodiment, a heat exchange core 33 corresponding to the heat exchange fresh air inlet 31 is provided inside the connection box 3. The heat exchange core 33 includes continuous curved plates 331 arranged at intervals from front to back. The bottom end of the continuous curved plate 331 is provided with a heat exchange supplementary air duct 332. An air outlet hole 3321 corresponding to the space between adjacent continuous curved plates 331 is provided on the top wall of the heat exchange supplementary air duct 332. One end of the heat exchange supplementary air duct 332 points to the heat exchange fresh air inlet 31 and the end pointing to the heat exchange fresh air inlet 31 is an open end.

[0034] The heat exchange core 33 is arranged inside the connection box 3 and corresponding to the heat exchange fresh air inlet 31. Its core function is to promote the heat exchange between the fresh air and the humid and hot air discharged from the drying box to realize the recovery and utilization of energy.

[0035] Specifically, the continuous curved plates 331 are arranged at intervals from front to back. This structure increases the flow path and residence time of air inside the heat exchange core. The air flows tortuously between the curved plates, enabling more sufficient heat exchange with the surrounding air and improving the heat exchange efficiency.

[0036] Among them, the heat exchange supplementary air duct 332 is located at the bottom end of the continuous curved plate 331, and an air outlet hole 3321 corresponding to the space between adjacent continuous curved plates 331 is provided on its top wall. This design enables the fresh air after heat exchange to be evenly distributed to each area of the heat exchange core 33 through the air outlet hole 3321, ensuring that the fresh air can fully participate in the heat exchange process.

[0037] Among them, a baffle 333 is provided at the top of the heat exchange core 33, and an air outlet groove 3331 corresponding to the space between adjacent continuous curved plates 331 is provided on the baffle 333.

[0038] The baffle 333 will have a certain obstructive effect on the air flow, prolonging the flow time of the air flow between the continuous curved plates 331, which helps to improve the heat exchange efficiency.

[0039] On the other hand, the baffle 333 itself plays a role in positioning and supporting the continuous curved plate 331.

[0040] In this embodiment, inclined guide plates 34 are symmetrically arranged on the left and right sides of the heat exchange core 33 in the connection box body 3. An air flow gap 35 is formed between the top end of the inclined guide plate 34 and the top wall of the connection box body 3. After the fresh air entering from the fresh air inlet 31 of the heat exchanger passes through the heat exchange air supply pipe 332 and enters the gap between the continuous curved plates 331 for heat exchange, it enters the return air assembly 4 through the air flow gap 35 under the guiding action of the inclined guide plate 34.

[0041] The inclined guide plates 34 are symmetrically arranged on the left and right sides of the heat exchange core 33, and their function is similar to a "guiding barrier". When the fresh air enters from the fresh air inlet 31 of the heat exchanger and is distributed to the gap between the continuous curved plates 331 for heat exchange through the heat exchange air supply pipe 332, the inclined guide plates 34 will prevent the fresh air from directly discharging from the side. Due to the existence of the inclined guide plates 34, the fresh air is forced to change its flow direction and can only pass through the heat exchange core 33 from bottom to top, thereby increasing the residence time of the fresh air in the heat exchange core 33 and the contact area with the humid and hot air.

[0042] In the absence of the inclined guide plates 34, part of the fresh air may quickly discharge from the side of the heat exchange core 33, resulting in too short a residence time in the heat exchange core 33 and insufficient heat exchange with the humid and hot air. The obstructive effect of the inclined guide plates 34 forces the fresh air to pass through the heat exchange core 33 from bottom to top, greatly prolonging the residence time of the fresh air in the heat exchange core 33. For example, the original residence time may be only 1 second, and under the action of the inclined guide plates 34, it may be extended to 2 - 3 seconds, enabling the fresh air to have enough time to absorb the heat in the humid and hot air.

[0043] The air flow gap 35 formed between the top end of the inclined guide plate 34 and the top wall of the connection box body 3 provides a clear outflow channel for the fresh air after heat exchange. Under the guiding action of the inclined guide plate 34, the fresh air rises along the inclined surface and finally enters the return air assembly 4 through the air flow gap 35, ensuring the orderly flow of the air flow.

[0044] The inclined guide plates 34 and the heat exchange core 33 cooperate to reduce the air flow fluctuation in the heat exchange core 33 and improve the stability and reliability of the system.

[0045] In this embodiment, a bracket 37 for installing a heat exchange core 33 is provided inside the connection box body 3, and wing plates 334 for detachably connecting to the bracket 37 are provided at the bottom end of the heat exchange core 33. A dehumidification box 5 is detachably provided below the heat exchange core 33.

[0046] Among them, the dehumidification box 5 is a mesh box, and drying particles are provided inside the mesh box. A U-shaped channel for clamping and placing the dehumidification box 5 is provided below the bracket 37.

[0047] When the humid and hot air is discharged, it first passes through the dehumidification box 5 for dehumidification, and then passes through the heat exchange core 33 for heat exchange and is then discharged externally through the dehumidification fan 2.

[0048] In this embodiment, a cover plate 311 is vertically slidably provided at the heat exchange fresh air inlet 31, and a first power member 36 for driving the cover plate 311 to reciprocate vertically is provided on the connection box body 3. When the cover plate 311 reciprocates vertically, the heat exchange fresh air inlet 31 is opened or closed.

[0049] Specifically, the first power member 36 is a vertically arranged air cylinder, and the cover plate 311 is driven to move up and down by the telescopic action of the air cylinder for adjustment.

[0050] Sliders are provided on the side surface of the cover plate 311 opposite to the connection box body 3, and chutes cooperating with the sliders are provided on the connection box body 3.

[0051] In this embodiment, an air volume regulating valve 321 is provided at the direct compensation fresh air inlet 32. A moving plate 322 is provided on the outer end surface of the air volume regulating valve 321, and a telescopic member 38 for driving the moving plate 322 to move is provided on the connection box body 3. When the moving plate 322 moves, the port of the air volume regulating valve 321 is closed or opened.

[0052] Specifically, side ears are provided on both sides of the moving plate 322. The telescopic member 38 is a horizontally arranged air cylinder and the telescopic member 38 is connected to the processor. By the action of the telescopic member 38, the moving plate 322 is pushed away from the air volume regulating valve 321, and the gap formed between the moving plate 322 and the air volume regulating valve 321 facilitates the air inlet operation.

[0053] When there is no need for air inlet at the direct compensation fresh air inlet 32, the moving plate 322 tightly presses on the air volume regulating valve 321.

[0054] Among them, a ventilation duct 39 is provided inside the connection box body 3 and is distributed opposite to the direct compensation fresh air inlet 32. The bracket 37 is formed at the top end of the ventilation duct 39. Uniform air ducts 391 are arranged in an array inside the ventilation duct 39. One end of the uniform air duct 391 is communicated with the air volume regulating valve 321 and the other end is communicated with the return air assembly 4.

[0055] The air distribution ducts 391 arranged in an array within the ventilation duct 39 are connected to the air volume regulating valve 321 at one end and to the return air assembly 4 at the other end. This design enables the air flow entering from the direct fresh air inlet 32 to be evenly distributed to the return air assembly 4 through the air distribution ducts 391 arranged in an array. The array arrangement of the air distribution ducts 391 can effectively disperse the incoming air flow into each duct, avoiding the concentration or sparseness of the air flow in local areas and ensuring the uniformity of the air flow distribution within the entire system.

[0056] In addition, the array arrangement design of the air distribution ducts 391 can buffer the air flow impact, enabling the air flow to enter the return air assembly 4 more smoothly, reducing the interference to the internal pressure and temperature of the system, and improving the stability and reliability of the system.

[0057] In this embodiment, the return air assembly 4 includes an upper return air connection port 41 connected to the connection box body 3 and a lower return air connection port 42 connected to the interior of the drying box. A fresh air fan 43 is connected between the upper return air connection port 41 and the lower return air connection port 42.

[0058] The structure of the return air assembly 4 is relatively independent and clear, and the layout of the upper return air connection port 41, the lower return air connection port 42, and the fresh air fan 43 is reasonable, facilitating the maintenance and upgrade of the system. When it is necessary to repair or replace components of the return air assembly 4, operations can be carried out conveniently without causing too much impact on the entire drying system. At the same time, this structure also provides convenience for the upgrade and transformation of the system. For example, a fresh air fan 43 with better performance can be replaced according to needs to improve the overall performance of the system.

[0059] Based on the above description of this specification, those skilled in the art can also understand the following terms used. For example, terms indicating orientation or position relationship such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or position relationship shown in the drawings of this specification. They are only for the purpose of facilitating the description of the solution of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operate in the specific orientation. Therefore, the above orientation or position relationship terms cannot be understood or interpreted as a limitation to the solution of the present invention.

[0060] In addition, in the description of this specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically and clearly defined.

Claims

1. An adaptive regulation system for the hot and humid air output and fresh air input of a drying system, comprising an air outlet hood (1) provided at the top of the drying box and communicating with the inside of the drying box, and a dehumidifying fan (2) provided at the top of the air outlet hood (1), characterized in that, A connecting box (3) is provided between the air outlet hood (1) and the dehumidifying fan (2); a heat exchange fresh air inlet (31) and a direct supply fresh air inlet (32) are provided on the front side of the connecting box (3); and a return air component (4) communicating with the interior of the drying box is provided on both the left and right sides of the connecting box (3); A heat exchange core (33) is provided in the connection box (3) and is distributed corresponding to the heat exchange fresh air outlet (31); the heat exchange core (33) comprises continuous curved plates (331) arranged at intervals from front to back; a heat exchange air supply pipe (332) is provided at the bottom end of the continuous curved plates (331); air outlet holes (3321) corresponding to the spaces between adjacent continuous curved plates (331) are provided on the top wall of the heat exchange air supply pipe (332); one end of the heat exchange air supply pipe (332) points to the heat exchange fresh air outlet (31), and the end pointing to the heat exchange fresh air outlet (31) is a non-closed end; The connecting box (3) is provided with inclined guide plates (34) symmetrically distributed on the left and right sides of the heat exchange core (33), and a flow gap (35) is formed between the top of the inclined guide plate (34) and the top wall of the connecting box (3). Fresh air entering from the heat exchange fresh air inlet (31) passes through the heat exchange supplementary air pipe (332) and enters the gap of the continuous curved plate (331) for heat exchange, and then passes through the flow gap (35) to enter the return air component (4) after the flow guiding effect of the inclined guide plate (34).

2. The hot and humid air outlet and fresh air inlet adaptive adjustment system of the drying system according to claim 1, wherein A baffle plate (333) is provided at the top end of the heat exchange core (33), and an air outlet slot (3331) corresponding to the adjacent continuous curved plates (331) is provided on the baffle plate (333).

3. The hot and humid air outlet and fresh air inlet adaptive adjustment system of the drying system according to claim 1, wherein A bracket (37) for mounting a heat exchange core (33) is provided in the connection box (3); a side wing plate (334) for detachably connecting to the bracket (37) is provided at the bottom end of the heat exchange core (33); and a dehumidification box (5) is detachably provided below the heat exchange core (33).

4. The hot and humid air outlet and fresh air inlet adaptive regulation system of the drying system according to claim 1, characterized in that, A cover plate (311) is provided at the heat exchange fresh air outlet (31) for vertical sliding, and a first power member (36) for driving the cover plate (311) to move vertically back and forth is provided on the connection box (3), and the heat exchange fresh air outlet (31) is opened or closed during the vertical reciprocating movement of the cover plate (311).

5. The hot and humid air outlet and fresh air inlet adaptive adjustment system of the drying system according to claim 3, wherein An air volume regulating valve (321) is provided at the direct fresh air inlet (32); a movable plate (322) is provided on the outer end surface of the air volume regulating valve (321); a telescopic member (38) for driving the movable plate (322) to move is provided on the connecting box (3); and the movable plate (322) closes or opens the port of the air volume regulating valve (321) during the movement.

6. The wet and hot air outlet and fresh air inlet adaptive regulation system of the drying system according to claim 5, characterized in that, The connection box (3) is provided with a ventilation duct (39) arranged opposite to the direct fresh air inlet (32); the bracket (37) is formed at the top of the ventilation duct (39); the ventilation duct (39) is provided with an array of air balancing ducts (391); one end of the air balancing duct (391) is connected to the air volume regulating valve (321) and the other end is connected to the return air assembly (4).

7. The adaptive regulation system for discharging humid and hot air and introducing fresh air of the drying system according to claim 1, wherein The return air assembly (4) includes an upper return air connection port (41) communicating with the connection box body (3) and a lower return air connection port (42) communicating with the inside of the drying box. A fresh air fan (43) is communicatively provided between the upper return air connection port (41) and the lower return air connection port (42).

8. The wet and hot air outlet and fresh air inlet adaptive adjustment system of the drying system according to claim 1, wherein An adjusting plate (11) for adjusting the air volume is provided in the air outlet hood (1). The cross section of the adjusting plate (11) is V-shaped. The adjusting plate (11) is rotationally supported in the air outlet hood (1) by a rotating shaft, and one end of the rotating shaft is provided with a motor for driving its rotation.

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