Hot air circulation drying system and method

Abstract

The invention belongs to the technical field of drying, and provides a hot air circulation drying system and method.The hot air circulation drying system comprises a shell, a conveying mechanism penetrates through the shell, a plurality of rotatable rollers are laid in the conveying mechanism, and a first arc-shaped guide plate and a second arc-shaped guide plate are fixedly arranged in the shell; the first arc-shaped flow guide plate and the second arc-shaped flow guide plate are oppositely arranged and divide the shell into a first cavity and a second cavity, the upper side and the lower side of the first arc-shaped flow guide plate are provided with an air outlet and a first air inlet respectively, and a water removal mechanism is arranged in the first cavity. According to the drying device, the water removal mechanism can absorb and discharge water stains on the rotating roller, and meanwhile, the heating mechanism can heat the rotating roller through the water removal mechanism, so that the bottom of a to-be-dried object is heated in a contact mode.

Description

Technical Field

[0001] The invention belongs to the technical field of drying, and in particular relates to a hot air circulation drying system and method. Background Art

[0002] The air circulation system of the hot air circulation oven adopts the fan circulation air supply method, and the air circulation is uniform and efficient to achieve a good baking effect. The equipment is suitable for baking chemical gases and food processing items to be baked, ink curing, paint film drying, etc. The equipment is widely used in electronics, motors, communications, electroplating, plastics, hardware chemicals, instruments, printing, pharmaceuticals, PC boards, powders, impregnation, spraying, glass, wood building materials and other fields.

[0003] In the existing hot air circulation drying system, when drying the object to be dried, the object to be dried is transported in the drying system by the conveyor, and the hot air heats the object to be dried in a reciprocating circulation manner.

[0004] In this process, the objects to be dried lose moisture after being heated for a period of time, thereby reducing their weight. Driven by the wind, the objects to be dried are easily concentrated or even collided with each other, which not only affects the heating effect of the objects to be dried, but also easily causes damage to their appearance. Summary of the invention

[0005] The purpose of the present invention is to provide a hot air circulation drying system and method, aiming to solve the technical problem in the prior art that under the impetus of wind flow, the objects to be dried are easily concentrated or even collided with each other, which not only affects the heating effect of the objects to be dried, but also easily causes damage to the appearance of the objects to be dried.

[0006] The present invention is implemented as follows: a hot air circulation drying system comprises a shell, a conveying mechanism passes through the shell, a plurality of rotatable rollers are laid in the conveying mechanism, a first arc guide plate and a second arc guide plate are fixedly arranged in the shell, the first arc guide plate and the second arc guide plate are arranged oppositely, the first arc guide plate and the second arc guide plate divide the shell into a first cavity and a second cavity, the upper and lower sides of the first arc guide plate are respectively provided with an air outlet and a first air inlet, a dewatering mechanism is arranged in the first cavity, the dewatering mechanism can absorb and discharge water stains on the roller, a heating mechanism is arranged on the side of the dewatering mechanism away from the conveying mechanism, the heating mechanism can heat the airflow, and the heating mechanism can heat the roller through the dewatering mechanism, so as to contact heat the bottom of the object to be dried; The dewatering mechanism is fixedly connected to a fan, a drying mechanism is arranged in the second cavity, the drying mechanism is connected to the second arc-shaped guide plate, the drying mechanism can heat the dried object from top to bottom, a guide mechanism for heating and guiding the wind is arranged on the side of the conveying mechanism away from the drying mechanism, and a second air inlet is arranged on the lower half of the second arc-shaped guide plate; A dehumidification mechanism is provided between the first arc guide plate and the second arc guide plate, and the dehumidification mechanism can absorb moisture in the air.

[0007] Further technical solution: the water removal mechanism includes a baffle, a water absorption pad, a water inlet trough and a water outlet pipe; The partition is fixedly connected to the inner wall of the outer shell, a plurality of water absorbent pads are arranged at intervals at one end of the partition, a plurality of water inlet grooves are arranged at the other end of the partition, a water outlet pipe is connected to the inside of the partition, and the water outlet pipe extends to the outside of the outer shell, the fan is fixedly connected to the water outlet pipe, and the bottom of the water absorbent pad is connected to the partition.

[0008] Further technical solution: the heating mechanism includes a support frame, an electric heating roller, an electric heating net and a connecting rod; The support frame is fixedly connected to the bottom of the shell, and the support frame is rotatably connected to multiple electric heating rollers in parallel, all of which are in contact with the bottom surface of the partition, each electric heating roller is fixedly connected to an electric heating network, and each electric heating network is connected to a connecting rod by a common rotation, and the water outlet pipe is fixedly connected to an electric push rod.

[0009] Further technical solution: the air-drying mechanism includes a connecting pipe, an air pump, a motor and an air guide plate; The second arc guide plate is rotatably connected to a connecting pipe, and the second arc guide plate is communicated with the connecting pipe, the connecting pipe is fixedly connected to an air guide plate, an air pump is arranged on the connecting pipe, the fixed part of the motor is fixedly connected to the second arc guide plate, and the output shaft of the motor is fixedly connected to the connecting pipe.

[0010] Further technical solution: the air guide mechanism includes a lifting seat, a fixing rod and an electric heating air guide plate; The inner end surface of the shell is fixedly connected with a lifting seat, the lifting seat is fixedly connected with a fixing rod, and the fixing rod is connected with electric heating air guide plates in parallel.

[0011] Further technical solution: The dehumidification mechanism includes a first induced draft fan and a second induced draft fan. Absorbent materials are provided inside the upper half of the first arc-shaped deflector and the second arc-shaped deflector. The first arc-shaped deflector and the second arc-shaped deflector are respectively connected to the first induced draft fan and the second induced draft fan on both the upper and lower sides. A first humidity sensor and a second humidity sensor are respectively arranged in the first cavity and the second cavity. The first humidity sensor, the second humidity sensor, the first induced draft fan, and the second induced draft fan are all electrically connected through a PLC controller.

[0012] Further technical solution: A friction belt is arranged on the end face of the partition plate on one side of the water inlet groove.

[0013] A hot air circulation drying method includes the following steps: S1: Place the object to be dried on the roller in the conveying mechanism, and continuously horizontally convey the object to be dried into the housing through the conveying mechanism. When the object to be dried enters the first cavity: S2: When the object to be dried enters the first cavity, under the separation of the water removal mechanism, the air flow reciprocally circulates along the upper and lower sides of the object to be dried. During this process, on the upper side of the object to be dried, the air flow dries the object in the direction opposite to the advancing direction of the object to be dried. At this time, under the effect of the added relative speed of the air flow and the object to be dried, the air flow can take away the moisture on the surface of the object to be dried. At this time, the water stains on the object to be dried drip onto the water removal mechanism. The water removal mechanism can absorb and discharge the water stains on the roller. At the same time, the heating mechanism can heat the roller through the water removal mechanism, so as to perform contact heating on the bottom of the object to be dried. When the air flow passes through the lower side of the object to be dried, the heating mechanism can heat the air flow at this time; S3: When the moisture on the object to be dried is fully taken away, the weight of the object to be dried becomes smaller. At this time, the object to be dried is transported to the second cavity, and the air flow dries the object to be dried from top to bottom through the air drying mechanism, and the air flow can pass through the gaps between the rollers. At this time, the air flow can dry each roller, and then under the guiding action of the guiding mechanism, the air flow enters the second arc-shaped deflector to continue circulating.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Driven by the fan, when the object to be dried enters the first cavity, during this process, on the upper side of the object to be dried, the air flow dries the object in the direction opposite to the advancing direction of the object to be dried. At this time, under the combined effect of the relative speed between the air flow and the object to be dried, the air flow can effectively take away the moisture on the surface of the object to be dried. At this time, the water stains on the object to be dried drip onto the water removal mechanism, and the water removal mechanism can absorb and discharge the water stains on the roller. At the same time, the heating mechanism can heat the roller through the water removal mechanism, so as to conduct contact heating on the bottom of the object to be dried; when the air flow flows through the lower side of the object to be dried, the heating mechanism can heat the air flow at this time, so as to improve the air drying effect of the air flow on the object to be dried.

[0015] 2. In the first cavity, the water removal mechanism absorbs water and conducts dry heat contact on the bottom of the object to be dried, so as to fully absorb the water accumulated at the bottom of the object to be dried. And under the partition of the partition plate, the air flow circulates reciprocally along the upper and lower sides of the object to be dried, so that on the upper side of the partition plate, the air flow dries the object to be dried in the direction opposite to the advancing direction of the object to be dried, improving the air drying effect; further, in the first cavity, start the telescopic movement of the electric push rod, and the drying uniformity of the object to be dried can be improved by adjusting the angles of all the electric heating grids.

[0016] 3. If the hot air continues to dry the object to be dried from front to back at this time, under the push of the wind force, the object to be dried in the front is likely to approach or even collide with the object to be dried at the rear, thus affecting the transportation stability of the object to be dried. Therefore, in the second cavity, the air flow dries the object to be dried from top to bottom through the air drying mechanism, and the air flow can pass through the gaps between the rollers. At this time, the air flow can dry each roller, and then under the guiding action of the guiding mechanism, the air flow enters the second arc-shaped guide plate to continue circulating.

[0017] 4. When the humidity difference between the first humidity sensor and the second humidity sensor exceeds the normal range, the first air suction fan and the second air suction fan are started at this time, so as to balance the air humidity in the first cavity and the second cavity, and improve the utilization efficiency of the water-absorbing materials in the first arc-shaped guide plate and the second arc-shaped guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the air drying mechanism of the present invention.

[0020] Figure 3 It is a schematic diagram of the connection between the first arc-shaped guide plate and the second arc-shaped guide plate of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the guiding mechanism of the present invention.

[0022] Figure 5 This is a schematic structural diagram of the water removal mechanism in the present invention.

[0023] Figure 6 This is a schematic structural diagram of the heating mechanism in the present invention.

[0024] In the attached drawings: 1. Outer shell; 2. Rotating roller; 3. Water removal mechanism; 31. Partition board; 32. Water absorption pad; 33. Water inlet tank; 34. Water outlet pipe; 4. Heating mechanism; 41. Support frame; 42. Electric heating roller; 43. Electric heating net; 44. Connecting rod; 5. Air drying mechanism; 51. Connecting pipe; 52. Air pump; 53. Motor; 54. Air guide disc; 6. Flow guiding mechanism; 61. Lifting seat; 62. Fixed rod; 63. Electric heating air guide plate; 7. Dehumidification mechanism; 71. First air suction fan; 72. Second air suction fan; 8. Air outlet; 9. First air inlet; 10. First arc-shaped flow guiding plate; 11. Second arc-shaped flow guiding plate; 12. Conveying mechanism; 13. Second air inlet; 14. Fan; 15. Friction belt; 16. Electric push rod; 17. First cavity; 18. Second cavity. Specific embodiments

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0027] As Figures 1 - 6 shown, a hot air circulation drying system provided by the present invention includes an outer shell 1, a conveying mechanism 12 passes through the outer shell 1, a plurality of rotatable rotating rollers 2 are laid in the conveying mechanism 12, a first arc-shaped flow guiding plate 10 and a second arc-shaped flow guiding plate 11 are fixedly arranged in the outer shell 1, the first arc-shaped flow guiding plate 10 and the second arc-shaped flow guiding plate 11 are arranged oppositely, the first arc-shaped flow guiding plate 10 and the second arc-shaped flow guiding plate 11 divide the outer shell 1 into a first cavity 17 and a second cavity 18, an air outlet 8 and a first air inlet 9 are respectively arranged on the upper and lower sides of the first arc-shaped flow guiding plate 10, a water removal mechanism 3 is arranged in the first cavity 17, the water removal mechanism 3 can absorb and discharge the water stains on the rotating roller 2, a heating mechanism 4 is arranged on the side of the water removal mechanism 3 away from the conveying mechanism 12, the heating mechanism 4 can heat the air flow, and the heating mechanism 4 can heat the rotating roller 2 through the water removal mechanism 3, so as to perform contact heating on the bottom of the object to be dried; The dewatering mechanism 3 is fixedly connected to a fan 14, and the second cavity 18 is provided with a drying mechanism 5, which is connected to the second arc-shaped guide plate 11, and the drying mechanism 5 can heat the dried object from top to bottom, and the conveying mechanism 12 is provided with a guide mechanism 6 for heating and guiding the wind on the side away from the drying mechanism 5, and the lower half of the second arc-shaped guide plate 11 is provided with a second air inlet 13; A dehumidification mechanism 7 is disposed between the first arc-shaped guide plate 10 and the second arc-shaped guide plate 11 , and the dehumidification mechanism 7 can absorb moisture in the air.

[0028] A hot air circulation drying method comprises the following steps: S1: The object to be dried is placed on the roller 2 in the conveying mechanism 12, and the object to be dried is continuously conveyed horizontally to the housing 1 by the conveying mechanism 12. When the object to be dried enters the first cavity 17: S2: When the object to be dried enters the first cavity 17, the airflow circulates back and forth along the upper and lower sides of the object to be dried under the separation of the water removal mechanism 3; in this process, on the upper side of the object to be dried, the airflow dries the object in the opposite direction to the advancing direction of the object to be dried. At this time, under the effect of the relative speed of the airflow and the object to be dried, the airflow can take away the moisture on the surface of the object to be dried. At this time, the water stains on the object to be dried drip onto the water removal mechanism 3, and the water removal mechanism 3 can absorb and discharge the water stains on the roller 2. At the same time, the heating mechanism 4 can heat the roller 2 through the water removal mechanism 3, so as to contact heat the bottom of the object to be dried; when the airflow flows through the lower side of the object to be dried, the heating mechanism 4 can heat the airflow; S3: When the moisture on the object to be dried is fully taken away, the weight of the object to be dried becomes smaller, and the object to be dried is transported to the second cavity 18, and the airflow dries the object to be dried from top to bottom through the air-drying mechanism 5, and the airflow can pass through the gaps between the rollers 2. At this time, the airflow can dry each roller 2, and then under the guidance of the guide mechanism 6, the airflow enters the second arc guide plate 11 and continues to circulate.

[0029] like Figure 5 As shown, a hot air circulation drying system provided by the present invention, the water removal mechanism 3 includes a partition 31, a water absorption pad 32, a water inlet trough 33 and a water outlet pipe 34; The partition 31 is fixedly connected to the inner wall of the outer shell 1, and a plurality of water absorbent pads 32 are arranged at intervals at one end of the partition 31, and a plurality of water inlet grooves 33 are arranged at the other end of the partition 31. The interior of the partition 31 is connected to a water outlet pipe 34, and the water outlet pipe 34 extends to the outside of the outer shell 1. The fan 14 is fixedly connected to the water outlet pipe 34, and the bottom of the water absorbent pad 32 is connected to the partition 31.

[0030] In this embodiment, when the rotating roller 2 passes over the upper surface of the partition plate 31, under the frictional force of the water absorption pad 32, the rotating roller 2 rotates. At this time, the water absorption pad 32 absorbs the moisture on the rotating roller 2, and under the extrusion force, the moisture on the water absorption pad 32 enters the partition plate 31 and is discharged from the water outlet pipe 34. Under the heating action of the heating mechanism 4, the water absorption pad 32 transfers heat to the rotating roller 2. When the rotating roller 2 continues to move forward, at this time, the rotating roller 2 is in direct contact with the surface of the partition plate 31, and the surface of the partition plate 31 directly heats the rotating roller 2. Since the moisture on the object to be dried accumulates from top to bottom, heating the bottom of the object to be dried by the rotating roller 2 at this time can effectively improve the heating efficiency of the bottom of the object to be dried. At the same time, the moisture at the bottom of the object to be dried is discharged from the water inlet tank 33 into the water outlet pipe 34.

[0031] As Figure 6 shown, a hot air circulation drying system provided by the present invention, the heating mechanism 4 includes a support frame 41, an electric heating roller 42, an electric heating net 43 and a connecting rod 44; The support frame 41 is fixedly connected to the bottom of the housing 1. The support frame 41 is rotatably connected with a plurality of electric heating rollers 42 in parallel. All the electric heating rollers 42 are in contact with the bottom surface of the partition plate 31. Each electric heating roller 42 is fixedly connected with an electric heating net 43. Each electric heating net 43 is jointly rotatably connected to the connecting rod 44. The water outlet pipe 34 is fixedly connected with an electric push rod 16.

[0032] In this embodiment, the electric heating roller 42 can always be in contact with the bottom surface of the partition plate 31, so as to always heat the partition plate 31. And when the wind passes through the lower side of the partition plate 31, at this time, the electric heating net 43 can heat the passing air flow, so as to improve the hot air drying effect of the air flow on the object to be dried; Further, the object to be dried after being sent out of the housing 1 is detected. When the upper and lower surfaces of the object to be dried are unevenly dried, at this time, the electric push rod 16 is started to stretch. When the electric push rod 16 extends, at this time, the electric push rod 16 pushes the electric heating net 43 on one side of it to rotate. All the electric heating nets 43 rotate synchronously under the drive of the connecting rod 44. When all the electric heating nets 43 approach the partition plate 31, at this time, the heating effect of the electric heating net 43 on the partition plate 31 increases, so as to increase the heating effect of the bottom of the object to be dried. At this time, the cross-sectional area of the air flow passing through the electric heating net 43 decreases, and the heating effect of the air flow on the upper part of the object to be dried decreases; on the contrary, when all the electric heating nets 43 rotate in the opposite direction, at this time, the heating effect of the electric heating net 43 on the air flow increases, and at the same time, the heating effect of the electric heating net 43 on the bottom of the object to be dried decreases. By adjusting the angles of all the electric heating nets 43, the drying uniformity of the object to be dried can be improved.

[0033] As Figure 2 shown, a hot air circulation drying system provided by the present invention, the air drying mechanism 5 includes a connecting pipe 51, an air pump 52, an electric motor 53 and a gas guide disc 54; The second arc-shaped deflector 11 is rotatably connected to a connecting pipe 51, and the second arc-shaped deflector 11 is in communication with the connecting pipe 51. The connecting pipe 51 is fixedly connected to an air guide disc 54. An air pump 52 is provided on the connecting pipe 51. The fixed part of the motor 53 is fixedly connected to the second arc-shaped deflector 11, and the output shaft of the motor 53 is fixedly connected to the connecting pipe 51.

[0034] In this embodiment, in the second cavity 18, driven by the air pump 52, the hot air is discharged from the second arc-shaped deflector 11 into the air guide disc 54, so that the hot air vertically dries the object to be dried from top to bottom. During this process, it can avoid the position deviation of the object to be dried caused by the oblique blowing of the air flow, and at the same time, the air flow can pass through the gaps between the rollers 2, so as to dry each roller 2. At this time, the motor 53 drives the air guide disc 54 to rotate, so that the air flow can dry the object to be dried from multiple directions, improving the overall drying effect of the object to be dried; when the air flow blows downward, under the guiding action of the guiding mechanism 6, the air flow returns from the second air inlet 13 to the second arc-shaped deflector 11.

[0035] As Figure 4 shown, a hot air circulation drying system provided by the present invention, the guiding mechanism 6 includes a lifting seat 61, a fixed rod 62 and an electric heating air guide plate 63; The inner end surface of the housing 1 is fixedly connected to a lifting seat 61, the lifting seat 61 is fixedly connected to a fixed rod 62, and the fixed rod 62 is connected in parallel with an electric heating air guide plate 63.

[0036] In this embodiment, all the air flows are heated and guided by the electric heating air guide plate 63, so that the air flows circulate in the second cavity 18.

[0037] As Figure 2 shown, a hot air circulation drying system provided by the present invention, the dehumidification mechanism 7 includes a first air suction fan 71 and a second air suction fan 72. Absorbent materials are provided inside the upper half of the first arc-shaped deflector 10 and the second arc-shaped deflector 11. The upper and lower sides of the first arc-shaped deflector 10 and the second arc-shaped deflector 11 are respectively communicated with a first air suction fan 71 and a second air suction fan 72. A first humidity sensor and a second humidity sensor are respectively arranged in the first cavity 17 and the second cavity 18. The first humidity sensor, the second humidity sensor, the first air suction fan 71 and the second air suction fan 72 are all electrically connected through a PLC controller.

[0038] During this process, the first humidity sensor and the second humidity sensor can monitor the humidity difference between the first cavity 17 and the second cavity 18. When the humidity difference is within the normal range, the air flow in the first cavity 17 is absorbed by the water-absorbing material in the first arc-shaped deflector 10 and then circulates, and the air flow in the second cavity 18 circulates after passing through the water-absorbing material in the second arc-shaped deflector 11; When the humidity difference between the first humidity sensor and the second humidity sensor exceeds the normal range, the first air extraction fan 71 and the second air extraction fan 72 are started at this time. The relatively humid air flow that enters the first arc-shaped deflector 10 from the first air inlet 9 is introduced into the second air inlet 13 by the second air extraction fan 72. This part of the air flow flows upward in the second air inlet 13, and then after being dried by the water-absorbing material in the second air inlet 13, the first air extraction fan 71 introduces the dried air flow in the second arc-shaped deflector 11 into the first arc-shaped deflector 10, and the dried air flow directly dries the object to be dried after coming out from the air outlet 8, so as to balance the air humidity in the first cavity 17 and the second cavity 18 and improve the utilization efficiency of the water-absorbing materials in the first arc-shaped deflector 10 and the second arc-shaped deflector 11.

[0039] As Figure 5 shown, a hot air circulation drying system provided by the present invention, a friction belt 15 is arranged on the end face of the partition plate 31 on one side of the water inlet groove 33.

[0040] In this embodiment, by contacting the friction belt 15 with the roller 2, the roller 2 can be continuously rotated, thereby improving the heating effect of the partition plate 31 on the roller 2.

[0041] Working principle: Place the object to be dried on the roller 2 in the conveying mechanism 12, and continuously horizontally convey the object to be dried into the housing 1 through the conveying mechanism 12. When the object to be dried enters the first cavity 17: Since the water removal mechanism 3 closes the gaps between the rollers 2 in the middle of the first cavity 17, under the drive of the fan 14, when the object to be dried enters the first cavity 17, during this process, on the upper side of the object to be dried, the air flow dries in the direction opposite to the advancing direction of the object to be dried. At this time, under the effect of the addition of the relative speed between the air flow and the object to be dried, the air flow can effectively take away the moisture on the surface of the object to be dried. At this time, the water stains on the object to be dried drip onto the water removal mechanism 3, and the water removal mechanism 3 can absorb and discharge the water stains on the roller 2. At the same time, the heating mechanism 4 can heat the roller 2 through the water removal mechanism 3, so as to perform contact heating on the bottom of the object to be dried; when the air flow flows through the lower side of the object to be dried, the heating mechanism 4 can heat the air flow at this time, so as to improve the drying effect of the air flow on the object to be dried; then the air flow enters the first arc-shaped deflector 10 from the lower side of the conveying mechanism 12 and continues to dry the object to be dried in the direction opposite to the advancing direction of the object to be dried; In the first cavity 17, the water removal mechanism 3 absorbs water from the bottom of the object to be dried and applies dry heat during contact, so as to fully absorb the moisture accumulated at the bottom of the object to be dried. Under the separation of the partition plate 31, the air flow reciprocally circulates along the upper and lower sides of the object to be dried, so that on the upper side of the partition plate 31, the air flow dries the object to be dried in the direction reverse to the advancing direction of the object to be dried, improving the drying effect of the air flow. Further, in the first cavity 17, the electric push rod 16 is started to expand and contract, and the drying uniformity of the object to be dried can be improved by adjusting the angles of all the electric heating grids 43.

[0042] When the moisture on the object to be dried is fully removed, the weight of the object to be dried becomes smaller. At this time, the object to be dried is transported to the second cavity 18: If the hot air continues to dry the object to be dried from front to back at this time, under the push of the wind force, the object to be dried in the front is likely to approach or even collide with the object to be dried at the rear, thus affecting the transportation stability of the object to be dried. Therefore, in the second cavity 18, the air flow dries the object to be dried from top to bottom through the air drying mechanism 5, and the air flow can pass through the gaps between the rollers 2. At this time, the rollers 2 can be dried by the air flow, and then under the guiding action of the guiding mechanism 6, the air flow enters the second arc-shaped guide plate 11 and continues to circulate.

[0043] Further, when the humidity difference between the first humidity sensor and the second humidity sensor exceeds the normal range, the first air suction fan 71 and the second air suction fan 72 are started at this time, so as to balance the air humidity in the first cavity 17 and the second cavity 18, and improve the utilization efficiency of the water absorption material in the first arc-shaped guide plate 10 and the second arc-shaped guide plate 11.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0045] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot air circulation drying system, comprising a housing (1), wherein a conveying mechanism (12) passes through the housing (1), and a plurality of rotatable rollers (2) are arranged in the conveying mechanism (12), characterized in that: A first arc-shaped flow guide plate (10) and a second arc-shaped flow guide plate (11) are fixedly arranged in the shell (1). The first arc-shaped flow guide plate (10) and the second arc-shaped flow guide plate (11) are arranged opposite to each other. The first arc-shaped flow guide plate (10) and the second arc-shaped flow guide plate (11) divide the shell (1) into a first cavity (17) and a second cavity (18). An air outlet (8) and a first air inlet (9) are respectively arranged on the upper and lower sides of the first arc-shaped flow guide plate (10). A dewatering mechanism (3) is arranged in the first cavity (17). The dewatering mechanism (3) is capable of absorbing and discharging water stains on the roller (2). A heating mechanism (4) is arranged on a side of the dewatering mechanism (3) away from the conveying mechanism (12). The heating mechanism (4) is capable of heating the airflow. The heating mechanism (4) is capable of heating the roller (2) through the dewatering mechanism (3), thereby contact heating the bottom of the object to be dried. The dewatering mechanism (3) is fixedly connected to a fan (14); a drying mechanism (5) is provided in the second cavity (18); the drying mechanism (5) is in communication with the second arc-shaped guide plate (11); the drying mechanism (5) is capable of heating the dried object from top to bottom; a guide mechanism (6) for heating and guiding wind is provided on a side of the conveying mechanism (12) facing away from the drying mechanism (5); and a second air inlet (13) is provided on the lower half of the second arc-shaped guide plate (11); A dehumidification mechanism (7) is provided between the first arc-shaped flow guide plate (10) and the second arc-shaped flow guide plate (11), and the dehumidification mechanism (7) is capable of absorbing moisture in the air.

2. The hot air circulation drying system according to claim 1, characterized in that: The water removal mechanism (3) comprises a partition (31), a water absorption pad (32), a water inlet groove (33) and a water outlet pipe (34); The partition (31) is fixedly connected to the inner wall of the outer shell (1); a plurality of water-absorbing pads (32) are arranged at intervals at one end of the partition (31); a plurality of water inlet grooves (33) are arranged at the other end of the partition (31); a water outlet pipe (34) is connected to the interior of the partition (31); the water outlet pipe (34) extends to the outside of the outer shell (1); the fan (14) is fixedly connected to the water outlet pipe (34); and the bottom of the water-absorbing pad (32) is connected to the partition (31).

3. The hot air circulation drying system according to claim 2, characterized in that: The heating mechanism (4) comprises a support frame (41), an electric heating roller (42), an electric heating net (43) and a connecting rod (44); The support frame (41) is fixedly connected to the bottom of the outer shell (1); the support frame (41) is rotatably connected to a plurality of electric heating rollers (42) in parallel; all the electric heating rollers (42) are in contact with the bottom surface of the partition (31); each electric heating roller (42) is fixedly connected to an electric heating network (43); each electric heating network (43) is rotatably connected to a connecting rod (44) together; and the water outlet pipe (34) is fixedly connected to an electric push rod (16).

4. The hot air circulation drying system according to claim 1, characterized in that: The air-drying mechanism (5) comprises a connecting pipe (51), an air pump (52), a motor (53) and an air guide plate (54); The second arc-shaped guide plate (11) is rotatably connected to a connecting pipe (51), and the second arc-shaped guide plate (11) is in communication with the connecting pipe (51), the connecting pipe (51) is fixedly connected to an air guide plate (54), an air pump (52) is provided on the connecting pipe (51), a fixed portion of the motor (53) is fixedly connected to the second arc-shaped guide plate (11), and an output shaft of the motor (53) is fixedly connected to the connecting pipe (51).

5. The hot air circulation drying system according to claim 1, characterized in that: The air guide mechanism (6) comprises a lifting seat (61), a fixing rod (62) and an electric heating air guide plate (63); The inner end surface of the housing (1) is fixedly connected to a lifting seat (61), the lifting seat (61) is fixedly connected to a fixing rod (62), and the fixing rod (62) is connected in parallel to an electric heating air guide plate (63).

6. The hot air circulation drying system according to claim 1, characterized in that: The dehumidification mechanism (7) comprises a first induced draft fan (71) and a second induced draft fan (72); the upper halves of the first arc-shaped guide plate (10) and the second arc-shaped guide plate (11) are provided with water-absorbing materials; the first arc-shaped guide plate (10) and the second arc-shaped guide plate (11) are connected to the first induced draft fan (71) and the second induced draft fan (72) at upper and lower sides; the first cavity (17) and the second cavity (18) are provided with a first humidity sensor and a second humidity sensor, respectively; the first humidity sensor and the second humidity sensor, the first induced draft fan (71), and the second induced draft fan (72) are electrically connected via a PLC controller.

7. The hot air circulation drying system according to claim 2, characterized in that: A friction belt (15) is provided on the end surface of the partition plate (31) on one side of the water inlet groove (33).

8. A hot air circulation drying method, applied to the hot air circulation drying system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The object to be dried is placed on the rotating roller (2) in the conveying mechanism (12), and the object to be dried is continuously conveyed horizontally into the housing (1) through the conveying mechanism (12). When the object to be dried enters the first cavity (17): S2: When the object to be dried enters the first cavity (17), the airflow circulates back and forth along the upper and lower sides of the object to be dried under the separation of the water removal mechanism (3); During this process, on the upper side of the object to be dried, the wind flow is directed in the opposite direction to the advancing direction of the object to be dried, and the wind flow is able to carry away moisture on the surface of the object to be dried due to the combined effect of the relative speed of the wind flow and the object to be dried. At this time, the water stains on the object to be dried drip onto the dewatering mechanism (3), and the dewatering mechanism (3) is able to absorb and discharge the water stains on the rotating roller (2). At the same time, the heating mechanism (4) is able to heat the rotating roller (2) through the dewatering mechanism (3), thereby contact heating the bottom of the object to be dried. When the wind flow flows through the lower side of the object to be dried, the heating mechanism (4) is able to heat the wind flow. S3: When the moisture on the object to be dried is fully removed, the weight of the object to be dried becomes smaller, and the object to be dried is transported to the second cavity (18). The airflow dries the object to be dried from top to bottom through the air-drying mechanism (5), and the airflow can pass through the gaps between the rollers (2). At this time, the airflow can dry the rollers (2). Then, under the guidance of the guide mechanism (6), the airflow enters the second arc guide plate (11) and continues to circulate.

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