Hot air circulation drying system and method

Abstract

The present invention belongs to the field of drying technology and provides a hot air circulation drying system and method. One example of the hot air circulation drying system includes a housing, a conveying mechanism extending through the housing, and a plurality of rotatable rollers disposed within the conveying mechanism. A first curved guide plate and a second curved guide plate are fixedly disposed within the housing. The first and second curved guide plates are disposed opposite each other and divide the housing into a first cavity and a second cavity. An air outlet and a first air inlet are disposed on the upper and lower sides of the first curved guide plate, respectively. A dewatering mechanism is disposed within the first cavity. In the present invention, the dewatering mechanism is capable of absorbing and draining water stains from the rollers, while the heating mechanism is capable of heating the rollers via the dewatering mechanism, thereby contact-heating the bottom of the article to be dried.

Description

Technical Field

[0001] The present 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 hot air circulation oven's air circulation system utilizes a fan-driven circulating air supply, ensuring uniform and efficient air circulation for optimal baking results. This equipment is suitable for baking items exposed to chemical gases, food processing, curing inks, and drying paint films. It is widely used in electronics, electrical machinery, communications, electroplating, plastics, hardware and chemical industries, instruments, printing, pharmaceuticals, PC boards, powders, impregnation, spraying, glass, and wood building materials.

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

[0004] During 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 influence of airflow, 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 achieved in this way: 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-shaped guide plate and a second arc-shaped guide plate are fixedly provided in the shell, the first arc-shaped guide plate and the second arc-shaped guide plate are arranged opposite to each other, the first arc-shaped guide plate and the second arc-shaped guide plate divide the shell into a first cavity and a second cavity, an air outlet and a first air inlet are respectively provided on the upper and lower sides of the first arc-shaped guide plate, a dewatering mechanism is provided in the first cavity, the dewatering mechanism can absorb and discharge water stains on the rollers, a heating mechanism is provided on the side of the dewatering mechanism facing away from the conveying mechanism, the heating mechanism can heat the airflow, and the heating mechanism can heat the rollers through the dewatering mechanism, thereby performing contact heating on the bottom of the to-be-dried material;

[0007] The dewatering mechanism is fixedly connected to a fan, and an air-drying mechanism is provided in the second cavity. The air-drying mechanism is connected to the second arc-shaped guide plate, and the air-drying mechanism can heat the dried object from top to bottom. A guide mechanism for heating and guiding the wind is provided on the side of the conveying mechanism away from the air-drying mechanism, and a second air inlet is provided on the lower half of the second arc-shaped guide plate;

[0008] A dehumidification mechanism is provided between the first arc-shaped guide plate and the second arc-shaped guide plate, and the dehumidification mechanism can absorb moisture in the air.

[0009] Further technical solution: the water removal mechanism includes a partition, a water absorbent pad, a water inlet trough and a water outlet pipe;

[0010] The partition is fixedly connected to the inner wall of the outer shell, a plurality of water-absorbing 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-absorbing pad is connected to the partition.

[0011] Further technical solution: the heating mechanism includes a support frame, an electric heating roller, an electric heating network and a connecting rod;

[0012] 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 electric heating rollers are in contact with the bottom surface of the partition. Each electric heating roller is fixedly connected to an electric heating network. Each electric heating network rotates together with a connecting rod, and the water outlet pipe is fixedly connected to an electric push rod.

[0013] Further technical solution: the air-drying mechanism includes a connecting pipe, an air pump, a motor and an air guide plate;

[0014] The second arc-shaped guide plate is rotatably connected to a connecting pipe, and the second arc-shaped guide plate is communicated with the connecting pipe. The connecting pipe is fixedly connected to an air guide plate. An air pump is provided on the connecting pipe. The fixed part of the motor is fixedly connected to the second arc-shaped guide plate, and the output shaft of the motor is fixedly connected to the connecting pipe.

[0015] Further technical solution: the air guide mechanism includes a lifting seat, a fixing rod and an electric heating air guide plate;

[0016] 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.

[0017] Further technical solution: The dehumidification mechanism includes an exhaust fan No. 1 and an exhaust fan No. 2, and the upper half of the No. 1 arc guide plate and the No. 2 arc guide plate are both provided with water-absorbing materials. The upper and lower sides of the No. 1 arc guide plate and the No. 2 arc guide plate are interconnected with the No. 1 exhaust fan and the No. 2 exhaust fan, and the No. 1 cavity and the No. 2 cavity are respectively provided with a No. 1 humidity sensor and a No. 2 humidity sensor, and the No. 1 humidity sensor, the No. 2 exhaust fan and the No. 2 exhaust fan are all electrically connected through a PLC controller.

[0018] Further technical solution: A friction belt is provided on the end surface of the partition at one side of the water inlet groove.

[0019] A hot air circulation drying method comprises the following steps:

[0020] S1: Place the object to be dried on the rollers in the conveying mechanism, and the conveying mechanism continuously conveys the object to be dried horizontally into the housing. When the object to be dried enters cavity No. 1:

[0021] S2: When the objects to be dried enter cavity No. 1, the airflow circulates back and forth along the upper and lower sides of the objects to be dried under the separation of the dewatering mechanism. During this process, on the upper side of the objects to be dried, the airflow dries the objects in the opposite direction of their forward movement. At this time, due to the combined effect of the relative speeds of the airflow and the objects to be dried, the airflow can remove moisture from the surface of the objects to be dried. At this time, water stains on the objects to be dried drip onto the dewatering mechanism, which absorbs and discharges the water stains on the roller. At the same time, the heating mechanism can heat the roller through the dewatering mechanism, thereby performing contact heating on the bottom of the objects to be dried. When the airflow flows through the lower side of the objects to be dried, the heating mechanism can heat the airflow.

[0022] S3: When the moisture on the objects to be dried is fully removed, the weight of the objects to be dried becomes smaller. At this time, the objects to be dried are transported to the No. 2 cavity. The airflow dries the objects to be dried from top to bottom through the air-drying mechanism, and the airflow can pass through the gaps between the rollers. At this time, the airflow can dry each roller. Then, under the guidance of the guide mechanism, the airflow enters the No. 2 arc-shaped guide plate and continues to circulate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Driven by the fan, when the objects to be dried enter cavity No. 1, during this process, on the upper side of the objects to be dried, the airflow is opposite to the forward direction of the objects to be dried to dry them. At this time, due to the combined effect of the relative speed of the airflow and the objects to be dried, the airflow can effectively carry away the moisture on the surface of the objects to be dried. At this time, the water stains on the objects to be dried drip onto the dewatering mechanism, and the dewatering mechanism can absorb and discharge the water stains on the roller. At the same time, the heating mechanism can heat the roller through the dewatering mechanism, thereby performing contact heating on the bottom of the objects to be dried; when the airflow flows through the lower side of the objects to be dried, the heating mechanism can heat the airflow, thereby improving the airflow's drying effect on the objects to be dried.

[0025] 2. In cavity No. 1, the water removal mechanism absorbs water from the bottom of the object to be dried and heats it when in contact, thereby fully absorbing the moisture accumulated at the bottom of the object to be dried. Under the separation of the partition, the airflow circulates back and forth along the upper and lower sides of the object to be dried, so that on the upper side of the partition, the airflow dries the object to be dried in the opposite direction of the forward direction of the object to be dried, thereby improving the airflow drying effect. Furthermore, in cavity No. 1, the electric push rod is activated to extend and retract, and the drying uniformity of the object to be dried can be improved by adjusting the angles of all electric heating networks.

[0026] 3. If the hot air continues to dry the objects to be dried from front to back at this time, the objects to be dried in the front will easily approach or even collide with the objects to be dried in the back under the push of the wind, thereby affecting the transportation stability of the objects to be dried. Therefore, in the No. 2 cavity, the airflow dries the objects to be dried from top to bottom through the air-drying mechanism, and the airflow can pass through the gaps between the rollers. At this time, the airflow can dry each roller, and then under the guidance of the guide mechanism, the airflow enters the No. 2 arc-shaped guide plate and continues to circulate.

[0027] 4. When the humidity difference between humidity sensor No. 1 and humidity sensor No. 2 exceeds the normal range, exhaust fans No. 1 and No. 2 are started to balance the air humidity in cavity No. 1 and cavity No. 2, thereby improving the utilization efficiency of the water-absorbing material in arc guide plate No. 1 and arc guide plate No. 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the air-drying mechanism in the present invention.

[0030] Figure 3 Schematic diagram of the connection between the first arc guide plate and the second arc guide plate in the present invention.

[0031] Figure 4 It is a structural schematic diagram of the flow guiding mechanism in the present invention.

[0032] Figure 5 It is a structural schematic diagram of the water removal mechanism in the present invention.

[0033] Figure 6 It is a structural schematic diagram of the heating mechanism in the present invention.

[0034] In the accompanying drawings: 1. outer shell; 2. rotating roller; 3. water removal mechanism; 31. partition; 32. water absorption pad; 33. water inlet trough; 34. water outlet pipe; 4. heating mechanism; 41. supporting frame; 42. electric heating roller; 43. electric heating network; 44. connecting rod; 5. air drying mechanism; 51. connecting pipe; 52. air pump; 53. motor; 54. air guide plate; 6. flow guide mechanism; 61. lifting seat; 62. fixing rod; 63. electric heating air guide plate; 7. dehumidification mechanism; 71. No. 1 induced draft fan; 72. No. 2 induced draft fan; 8. air outlet; 9. No. 1 air inlet; 10. No. 1 curved guide plate; 11. No. 2 curved guide plate; 12. conveying mechanism; 13. No. 2 air inlet; 14. fan; 15. friction belt; 16. electric push rod; 17. No. 1 cavity; 18. No. 2 cavity. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0037] like Figures 1-6 As shown, a hot air circulation drying system provided by the present invention includes a shell 1, a conveying mechanism 12 is passed through the shell 1, and a plurality of rotatable rollers 2 are laid in the conveying mechanism 12. A first arc guide plate 10 and a second arc guide plate 11 are fixedly provided in the shell 1. The first arc guide plate 10 and the second arc guide plate 11 are arranged opposite to each other, and the first arc guide plate 10 and the second arc guide plate 11 divide the shell 1 into a first cavity 17 and a second cavity 18. The upper and lower sides of the first arc-shaped guide plate 10 are respectively provided with an air outlet 8 and a first air inlet 9. A dewatering mechanism 3 is provided in the first cavity 17. The dewatering mechanism 3 can absorb and discharge water stains on the roller 2. The side of the dewatering mechanism 3 facing away from the conveying mechanism 12 is provided with a heating mechanism 4. The heating mechanism 4 can heat the airflow, and the heating mechanism 4 can heat the roller 2 through the dewatering mechanism 3, thereby performing contact heating on the bottom of the dried material.

[0038] 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. The drying mechanism 5 can heat the dried material from top to bottom. 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. The lower half of the second arc-shaped guide plate 11 is provided with a second air inlet 13;

[0039] A dehumidification mechanism 7 is provided 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.

[0040] A hot air circulation drying method comprises the following steps:

[0041] S1: The object to be dried is placed on the roller 2 in the conveying mechanism 12. The conveying mechanism 12 continuously conveys the object to be dried horizontally into the housing 1. When the object to be dried enters the first cavity 17:

[0042] S2: When the objects to be dried enter the first cavity 17, the airflow circulates back and forth along the upper and lower sides of the objects to be dried under the separation of the dewatering mechanism 3. During this process, on the upper side of the objects to be dried, the airflow dries the objects in the opposite direction of their forward movement. At this time, due to the combined effect of the relative speeds of the airflow and the objects to be dried, the airflow can remove moisture from the surface of the objects to be dried. At this time, water stains on the objects to be dried drip onto the dewatering mechanism 3, which 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 dewatering mechanism 3, thereby performing contact heating on the bottom of the objects to be dried. When the airflow flows through the lower side of the objects to be dried, the heating mechanism 4 can heat the airflow.

[0043] S3: 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, and 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 air flow can dry each roller 2, and then under the guidance of the guide mechanism 6, the air flow enters the second arc-shaped guide plate 11 and continues to circulate.

[0044] 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 absorbent pad 32, a water inlet trough 33 and a water outlet pipe 34;

[0045] The partition 31 is fixedly connected to the inner wall of the outer shell 1, and 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 provided 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-absorbing pad 32 is connected to the partition 31.

[0046] In this embodiment, when the roller 2 passes through the upper surface of the partition 31, the roller 2 rotates under the friction force of the water-absorbing pad 32. At this time, the water-absorbing pad 32 absorbs the moisture on the roller 2, and under the squeezing force, the moisture on the water-absorbing pad 32 enters the partition 31 and is discharged from the water outlet pipe 34. Under the heating action of the heating mechanism 4, the water-absorbing pad 32 transfers heat to the roller 2. When the roller 2 continues to move forward, the roller 2 is in direct contact with the surface of the partition 31, and the surface of the partition 31 directly heats the roller 2. Since the moisture on the object to be dried accumulates from top to bottom, the roller 2 heats the bottom of the object to be dried, which 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 trough 33 into the water outlet pipe 34.

[0047] like Figure 6 As 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 network 43 and a connecting rod 44;

[0048] The support frame 41 is fixedly connected to the bottom of the outer shell 1, and the support frame 41 is rotatably connected to multiple electric heating rollers 42 in parallel. All 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 rotates together to connect the connecting rod 44. The water outlet pipe 34 is fixedly connected to the electric push rod 16.

[0049] In this embodiment, the electric heating roller 42 can always be in contact with the bottom surface of the partition 31, so that the partition 31 is always heated. When the wind passes through the lower side of the partition 31, the electric heating network 43 can heat the passing air flow, thereby improving the air-heat drying effect of the air flow on the objects to be dried.

[0050] Furthermore, the objects to be dried are inspected after being sent out of the shell 1. When the upper and lower surfaces of the objects to be dried are dried unevenly, the electric push rod 16 is started to extend and retract. When the electric push rod 16 is extended, the electric push rod 16 pushes the electric heating network 43 on one side thereof to rotate, and all the electric heating networks 43 rotate synchronously driven by the connecting rod 44. When all the electric heating networks 43 are close to the partition 31, the heating effect of the electric heating network 43 on the partition 31 is increased, thereby increasing the heating effect of the bottom of the objects to be dried. At this time, the flow area of ​​the airflow when passing through the electric heating network 43 is reduced, and the heating effect of the airflow on the upper part of the objects to be dried is reduced; conversely, when all the electric heating networks 43 rotate in the opposite direction, the heating effect of the electric heating network 43 on the airflow is increased, and the heating effect of the electric heating network 43 on the bottom of the objects to be dried is reduced. By adjusting the angles of all the electric heating networks 43, the drying uniformity of the objects to be dried can be improved.

[0051] like Figure 2 As 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, a motor 53 and an air guide plate 54;

[0052] The second arc-shaped guide plate 11 is rotatably connected to the connecting pipe 51, and the second arc-shaped guide plate 11 is communicated with the connecting pipe 51. The connecting pipe 51 is fixedly connected to the air guide plate 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 guide plate 11, and the output shaft of the motor 53 is fixedly connected to the connecting pipe 51.

[0053] In this embodiment, in the No. 2 cavity 18, driven by the air pump 52, the hot air is discharged from the No. 2 arc-shaped guide plate 11 to the air guide plate 54, so that the hot air is dried vertically from top to bottom for the objects to be dried. In this process, the oblique blowing of the wind can be avoided to cause the position of the objects to be dried to be offset. At the same time, the wind can pass through the gaps between the rollers 2, thereby drying each roller 2. At this time, the motor 53 drives the air guide plate 54 to rotate, so that the wind can dry the objects to be dried from multiple directions, thereby improving the overall drying effect of the objects to be dried; when the wind blows downward, under the guiding action of the guide mechanism 6, the wind flows back from the No. 2 air inlet 13 to the No. 2 arc-shaped guide plate 11.

[0054] like Figure 4 As shown, a hot air circulation drying system provided by the present invention, the guide mechanism 6 includes a lifting seat 61, a fixing rod 62 and an electric heating guide plate 63;

[0055] 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 with an electric heating air guide plate 63 .

[0056] In this embodiment, all airflows are heated and guided by the electric heating air guide plate 63 , so that the airflows circulate in the second cavity 18 .

[0057] like Figure 2 As shown, a hot air circulation drying system provided by the present invention, the dehumidification mechanism 7 includes a No. 1 induced draft fan 71 and a No. 2 induced draft fan 72, the upper half of the No. 1 arc guide plate 10 and the No. 2 arc guide plate 11 are both provided with water-absorbing materials, the No. 1 arc guide plate 10 and the No. 2 arc guide plate 11 are both connected to each other on the upper and lower sides with the No. 1 induced draft fan 71 and the No. 2 induced draft fan 72, the No. 1 cavity 17 and the No. 2 cavity 18 are respectively provided with a No. 1 humidity sensor and a No. 2 humidity sensor, the No. 1 humidity sensor and the No. 2 humidity sensor, the No. 1 induced draft fan 71 and the No. 2 induced draft fan 72 are all electrically connected through a PLC controller.

[0058] 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 a normal range, the airflow in the first cavity 17 is absorbed by the water-absorbing material in the first arc-shaped guide plate 10 and then circulates. The airflow in the second cavity 18 is then circulated after passing through the water-absorbing material in the second arc-shaped guide plate 11.

[0059] When the humidity difference between humidity sensor No. 1 and humidity sensor No. 2 exceeds the normal range, exhaust fan No. 1 71 and exhaust fan No. 2 72 are started, and exhaust fan No. 2 72 introduces the airflow with higher humidity that enters the No. 1 air inlet 9 into the No. 1 arc guide plate 10 into the No. 2 air inlet 13. This part of the airflow flows upward in the No. 2 air inlet 13, and then dries the water-absorbing material in the No. 2 air inlet 13. Exhaust fan No. 1 71 introduces the dry airflow in the No. 2 arc guide plate 11 into the No. 1 arc guide plate 10, and the dried airflow comes out of the air outlet 8 and directly dries the object to be dried, thereby balancing the air humidity in cavity No. 1 17 and cavity No. 2 18, and improving the utilization efficiency of the water-absorbing material in the No. 1 arc guide plate 10 and the No. 2 arc guide plate 11.

[0060] like Figure 5 As shown in FIG, a hot air circulation drying system provided by the present invention is provided, wherein a friction belt 15 is provided on the end surface of the partition 31 on one side of the water inlet groove 33 .

[0061] In this embodiment, the friction belt 15 is in contact with the roller 2 , so that the roller 2 can be continuously rotated, thereby enhancing the heating effect of the partition 31 on the roller 2 .

[0062] Working principle:

[0063] The object to be dried is placed on the roller 2 in the conveying mechanism 12. The conveying mechanism 12 continuously conveys the object to be dried horizontally into the housing 1. When the object to be dried enters the first cavity 17:

[0064] Since the dewatering mechanism 3 closes the gaps between the rollers 2 in the middle of the No. 1 cavity 17, driven by the fan 14, when the material to be dried enters the No. 1 cavity 17, during this process, on the upper side of the material to be dried, the air flow is opposite to the forward direction of the material to be dried for air drying. At this time, under the effect of the relative speed of the air flow and the material to be dried, the air flow can effectively take away the moisture on the surface of the material to be dried. At this time, the water stains on the material to be dried drip onto the dewatering mechanism 3, and the dewatering mechanism 3 can absorb and discharge the water stains on the rollers 2. At the same time, the heating mechanism 4 can heat the rollers 2 through the dewatering mechanism 3, thereby performing contact heating on the bottom of the material to be dried; when the air flow flows through the lower side of the material to be dried, the heating mechanism 4 can heat the air flow, thereby enhancing the air flow drying effect of the material to be dried; then the air flow enters the No. 1 arc-shaped guide plate 10 from the lower side of the conveying mechanism 12, and continues to dry the material to be dried in the opposite direction of the forward direction of the material to be dried;

[0065] In cavity No. 17, the dewatering mechanism 3 absorbs water from the bottom of the object to be dried and heats it when in contact, thereby fully absorbing the moisture accumulated at the bottom of the object to be dried, and under the separation of the partition 31, the airflow circulates back and forth along the upper and lower sides of the object to be dried, so that on the upper side of the partition 31, the airflow dries the object to be dried in the opposite direction of the forward direction of the object to be dried, thereby improving the airflow drying effect; further, in cavity No. 17, the electric push rod 16 is started to extend and retract, and the drying uniformity of the object to be dried can be improved by adjusting the angles of all the electric heating networks 43.

[0066] When the moisture on the objects to be dried is fully removed, the weight of the objects to be dried becomes lighter, and the objects to be dried are then transported to the second cavity 18:

[0067] If the hot air continues to dry the objects to be dried from front to back at this time, the objects to be dried in the front will easily approach or even collide with the objects to be dried in the back under the push of the wind, thereby affecting the transportation stability of the objects to be dried. Therefore, in the No. 2 cavity 18, the airflow dries the objects 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 No. 2 arc-shaped guide plate 11 and continues to circulate.

[0068] Furthermore, when the humidity difference between humidity sensor No. 1 and humidity sensor No. 2 exceeds the normal range, exhaust fan No. 1 71 and exhaust fan No. 2 72 are started to balance the air humidity in cavity No. 1 17 and cavity No. 2 18, thereby improving the utilization efficiency of the water-absorbing material in arc guide plate No. 1 10 and arc guide plate No. 2 11.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0070] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods 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 guide plate (10) and a second arc-shaped guide plate (11) are fixedly provided in the shell (1). The first arc-shaped guide plate (10) and the second arc-shaped guide plate (11) are arranged opposite to each other. The first arc-shaped guide plate (10) and the second arc-shaped guide plate (11) divide the shell (1) into a first cavity (17) and a second cavity (18). An air outlet (8) and an air inlet (9) are provided on the upper and lower sides of the first arc-shaped guide plate (10), respectively. A dewatering mechanism (3) is provided in the first cavity (17). The dewatering mechanism (3) can absorb and discharge water stains on the roller (2). A heating mechanism (4) is provided on the side of the dewatering mechanism (3) away from the conveying mechanism (12). The heating mechanism (4) can heat the airflow, and the heating mechanism (4) can heat the roller (2) through the dewatering mechanism (3), thereby performing contact heating on the bottom of the object to be dried. The dewatering mechanism (3) is fixedly connected to a fan (14), and a drying mechanism (5) is provided in the second cavity (18). The drying mechanism (5) is connected to the second arc-shaped guide plate (11), and the drying mechanism (5) can heat the dried object from top to bottom. A guide mechanism (6) for heating and guiding the wind is provided on the 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 guide plate (10) and the second arc-shaped guide plate (11), and the dehumidification mechanism (7) is capable of absorbing moisture in the air; The dehumidification mechanism (7) includes a No. 1 induced draft fan (71) and a No. 2 induced draft fan (72), the upper halves of the No. 1 arc-shaped guide plate (10) and the No. 2 arc-shaped guide plate (11) are both provided with water-absorbing materials, the No. 1 arc-shaped guide plate (10) and the No. 2 arc-shaped guide plate (11) are both connected to the No. 1 induced draft fan (71) and the No. 2 induced draft fan (72) on both upper and lower sides, the No. 1 arc-shaped guide plate (10) and the No. 2 arc-shaped guide plate (11) are both connected to the No. 1 induced draft fan (71) and the No. 2 induced draft fan (72), the No. 1 cavity (17) and the No. 2 cavity (18) are respectively provided with a No. 1 humidity sensor and a No. 2 humidity sensor, the No. 1 humidity sensor, the No. 2 humidity sensor, the No. 1 induced draft fan (71) and the No. 2 induced draft fan (72) are all electrically connected via a PLC controller.

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 absorbing 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); 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 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 connected to a connecting rod (44) through a common rotation. 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 communicated 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). The fixed portion of the motor (53) is fixedly connected to the second arc-shaped guide plate (11), and the 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 side by side to an electric heating air guide plate (63).

6. 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 (31) on one side of the water inlet groove (33).

7. A hot air circulation drying method, applied to the hot air circulation drying system according to any one of claims 1 to 6, characterized in that: The following steps are involved: 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 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 forward direction of the object to be dried, and at this time, under the effect of the relative speed of the wind flow and the object to be dried, the wind flow can take away the moisture on the surface of the object to be dried, and at this time, the water stains on the object to be dried drip onto the dewatering mechanism (3), and the dewatering 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 dewatering mechanism (3), thereby performing contact heating on 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) can 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 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.

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