CN113237310B

CN113237310B - Pyrotechnic dryer and control method thereof

Info

Publication number: CN113237310B
Application number: CN202110592289.0A
Authority: CN
Inventors: 刘若平; 刘美君
Original assignee: Changsha Yueqi Energy Saving Electrical Equipment Co ltd
Current assignee: Hunan Qijun Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2023-05-19
Anticipated expiration: 2041-05-28
Also published as: CN113237310A

Abstract

The invention provides a pyrotechnic dryer and a control method thereof, wherein the pyrotechnic dryer comprises: the feeding chamber comprises a feeding machine shell, a first conveying mechanism arranged in the feeding machine shell and a first motor for driving the first conveying mechanism; the drying chamber is connected with the feeding chamber and comprises a drying machine shell, a second conveying mechanism arranged in the drying machine shell, a second motor used for driving the second conveying mechanism and a drying fan; the cooling chamber is connected with the drying chamber and comprises a cooling shell, a third conveying mechanism, a third motor for driving the third conveying mechanism and a cooling fan; partition sealing devices are arranged at two ends of the drying chamber; the partition sealing device comprises a linear telescopic mechanism and a partition door connected with the output end of the linear telescopic mechanism. The invention provides a pyrotechnic composition dryer and a control method thereof, and aims to solve the technical problems of large occupied area and low working efficiency of pyrotechnic composition drying equipment in the prior art.

Description

Pyrotechnic dryer and control method thereof

Technical Field

The invention relates to the field of drying equipment, in particular to a pyrotechnic dryer and a control method thereof.

Background

The fireworks are traditional festive products in China, and have very long production history and folk-custom setting off. As the origin of the fireworks and crackers, china is the largest production country and export country of the fireworks and crackers in the world. From 2008, the scale of firework production in China is continuously increased to a higher level, and the quantity and quality of products are rapidly developed. Because of the aesthetic and practical value of the fireworks and crackers per se and the continuous improvement of the living standard of people, more and more people and enterprises purchase the fireworks and crackers for increasing the festival atmosphere, areas of China which depend on the fireworks and crackers industry are rich, and the fireworks and crackers become the pillar industry of the areas.

The drying of the pyrotechnic composition is an important process in the preparation process of the pyrotechnic composition, and most enterprises currently dry the pyrotechnic composition through a drying room or sequentially operate a plurality of devices to form a drying system for drying the pyrotechnic composition. The disadvantage of this approach is the large floor space and low operating efficiency.

In view of this, there is a need for a pyrotechnic dryer and a control method thereof that solves or at least alleviates the above-mentioned problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a pyrotechnic composition dryer and a control method thereof, which aim to solve the technical problems of large occupied area and low working efficiency of pyrotechnic composition drying equipment in the prior art.

In order to achieve the above object, the present invention provides a pyrotechnic dryer including:

the feeding chamber comprises a feeding machine shell, a first conveying mechanism arranged in the feeding machine shell and a first motor for driving the first conveying mechanism;

the drying chamber is connected with the feeding chamber and comprises a drying machine shell, a second conveying mechanism arranged in the drying machine shell, a second motor used for driving the second conveying mechanism and a drying fan;

the cooling chamber is connected with the drying chamber and comprises a cooling shell, a third conveying mechanism arranged in the cooling shell, a third motor used for driving the third conveying mechanism and a cooling fan;

the two ends of the drying chamber are provided with the partition sealing devices; the partition sealing device comprises a linear telescopic mechanism and a partition door connected with the output end of the linear telescopic mechanism, and the partition door can seal the drying chamber under the drive of the linear telescopic mechanism;

and the control unit of the first motor, the second motor, the third motor, the drying fan, the cooling fan and the linear telescopic mechanism is respectively and electrically connected with the control device.

In addition, the invention also provides a control method of the pyrotechnic dryer, which is applied to the pyrotechnic dryer, and comprises the following steps:

after the feeding of the smoke and fire to be dried on the first conveying mechanism is completed, driving the first motor to drive the first conveying mechanism to move, and driving the second motor to drive the second conveying mechanism to move so that the smoke and fire to be dried is transferred to the second conveying mechanism;

stopping the first motor and the second motor, starting the drying fan to perform drying operation, and driving the linear telescopic mechanism to extend the partition door out of the drying chamber;

after the drying operation is carried out for 0.5-2 hours, the linear telescopic mechanism is driven to retract the partition door, the first motor is driven to drive the first conveying mechanism to move, the second motor is driven to drive the second conveying mechanism to move, and meanwhile the third motor is driven to drive the third conveying mechanism to move, so that the dried smoke and fire on the second conveying mechanism is transferred to the third conveying mechanism; transferring new smoke and fire to be dried on the first conveying mechanism to the second conveying mechanism;

stopping the first motor, the second motor and the third motor, starting the drying fan to perform drying operation, driving the linear telescopic mechanism to extend the partition door out of the drying chamber, and starting the cooling fan to perform cooling operation;

after the drying operation and the cooling operation are carried out for 0.5-2 hours at the same time, the linear telescopic mechanism is driven to retract the partition door, the first motor is driven to drive the first conveying mechanism to move, the second motor is driven to drive the second conveying mechanism to move, and the third motor is driven to drive the third conveying mechanism to move, so that the cooled firework on the third conveying mechanism is discharged, and the dried firework on the second conveying mechanism is transferred to the third conveying mechanism; and transferring new smoke and fire to be dried on the first conveying mechanism to the second conveying mechanism, and circularly operating according to the new smoke and fire to be dried.

Preferably, the rotational speeds of the first motor, the second motor, and the third motor are the same.

Preferably, sensing devices are arranged at two ends of the drying chamber, and the control method further comprises the following steps:

and receiving the signal of the sensing device, and stopping the drying fan when detecting that the two ends of the drying chamber are not closed.

Preferably, the partition sealing device comprises a partition frame, the linear telescopic mechanism is arranged at the top or bottom of the partition frame, the partition door is slidably arranged on the partition frame along the height direction of the drying chamber, and the partition door is parallel to the width direction of the second conveying mechanism.

Preferably, the partition rack is provided with an opening along a side wall of the second conveying mechanism in the length direction, and the conveyor belt penetrates through the opening.

Preferably, the third conveying mechanism is a belt conveying mechanism, and an upper conveying area and a lower return area are formed on the third conveying mechanism; the cooling chamber further comprises a cleaning device, the cleaning device comprises at least one water inlet pipe and a plurality of water outlet pipes communicated with the water inlet pipe, the water inlet pipes are arranged along the transmission direction of the third conveying mechanism, and the water outlet pipes extend to the upper part and/or the lower part of the lower return area; wherein, one side of the water outlet pipe facing the lower return area is provided with a plurality of water outlets; the control method further includes:

when the pyrotechnic dryer stops working, the cleaning device is started to clean the cooling chamber.

Preferably, the number of the water inlet pipes is 2, and the water inlet pipes comprise a first water inlet pipe and a second water inlet pipe, the first water inlet pipe is arranged between the upper transportation area and the lower return area, and the water outlet pipe communicated with the first water inlet pipe is positioned above the lower return area; the second water inlet pipe is arranged below the lower return area, and the water outlet pipe communicated with the second water inlet pipe is arranged below the lower return area.

In the scheme of this application, the firework drying-machine is formed by feeding room, drying chamber and cooling chamber connecting gradually for feeding process, stoving process, cooling process and ejection of compact process link up each other, go on in an organic whole. Wherein, first conveying mechanism in the feed casing is used for the feeding of cigarette gunpowder to on conveying the second conveying mechanism in the stoving casing with the pyrotechnic composition, stoving fan carries out the stoving operation to the pyrotechnic composition on the second conveying mechanism, first motor drive first conveying mechanism work. After the firework powder is dried, the second conveying mechanism transmits the firework powder to the third conveying mechanism in the cooling shell, the cooling fan cools the firework powder on the third conveying mechanism, the third conveying mechanism discharges the firework powder after cooling, the second motor drives the second conveying mechanism to work, and the third motor drives the third conveying mechanism to work. Wherein, in order to guarantee the safety of stoving operation, the both ends of drying chamber all are provided with cuts off sealing device, cut off sealing device and include sharp telescopic machanism and the wall door of being connected with sharp telescopic machanism's output, cut off the door and can seal the drying chamber under sharp telescopic machanism's drive. When the drying operation is carried out, the partition sealing device enables the drying chamber to be in a fully-closed state, so that the operation safety is ensured, and the potential safety hazard is eliminated. The control device is used for controlling the mechanisms to cooperatively complete work. The firework dryer is compact in structure, small in occupied area and high in working efficiency, and all the working procedures are connected with each other.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an integrated pyrotechnic dryer in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a partition seal according to an embodiment of the present invention;

FIG. 3 is a schematic view of a first conveying mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a third conveying mechanism according to an embodiment of the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Reference numerals illustrate:

100-feeding chambers, 110-first conveying mechanisms, 111-conveying rollers, 112-conveying belts, 113-unit cells and 114-enclosing parts;

200-a drying chamber and 210-a second conveying mechanism;

300-cooling chamber, 310-third conveying mechanism, 320-cooling fan, 330-cleaning device, 331-water inlet pipe, 332-water outlet pipe, 333-upper transport area, 334-lower recovery area;

400-partition sealing device, 410-linear telescopic mechanism and 420-partition door.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1, in order to achieve the above object, the present invention provides a pyrotechnic dryer comprising:

a feed chamber 100, the feed chamber 100 including a feed housing and a first conveying mechanism 110 disposed within the feed housing and a first motor (not shown) for driving the first conveying mechanism 110;

a drying chamber 200 connected to the feeding chamber 100, the drying chamber 200 including a drying cabinet, a second conveying mechanism 210 provided in the drying cabinet, a second motor (not shown) for driving the second conveying mechanism 210, and a drying blower; the operator loads the pyrotechnical powder to be dried onto the first conveying mechanism 110, the pyrotechnical powder is conveyed onto the second conveying mechanism 210 by the first conveying mechanism 110, and the drying fan dries the pyrotechnical powder on the second conveying mechanism 210;

a cooling chamber 300 connected to the drying chamber 200, the cooling chamber 300 including a cooling cabinet, a third conveying mechanism 310 provided in the cooling cabinet, a third motor (not shown) for driving the third conveying mechanism 310, and a cooling fan 320; the temperature of the pyrotechnic composition after drying is higher, the pyrotechnic composition needs to be cooled to avoid potential safety hazards, the dried pyrotechnic composition is transmitted to the third conveying mechanism 310 by the second conveying mechanism 210, the temperature-reducing fan 320 cools the pyrotechnic composition on the third conveying mechanism 310, and the pyrotechnic composition is discharged by the third conveying mechanism 310 after cooling.

Partition sealing device 400, two ends of drying chamber 200 are provided with partition sealing device 400; the partition sealing device 400 includes a linear expansion mechanism 410 and a partition door 420 connected to an output end of the linear expansion mechanism 410, and the partition door 420 can close the drying chamber 200 under the driving of the linear expansion mechanism 410. When the drying operation is performed, the partition sealing device 400 enables the drying chamber 200 to be in a fully-closed state, so that the operation safety is ensured, and the potential safety hazard is eliminated.

The control unit of the first motor, the second motor, the third motor, the drying fan, the cooling fan 320 and the linear expansion mechanism 310 are electrically connected with the control unit, respectively.

In the scheme of this application, the firework drying-machine is formed by feeding room 100, drying chamber 200 and cooling chamber 300 being connected gradually for feeding process, stoving process, cooling process and ejection of compact process link up each other, go on integratively. The first conveying mechanism 110 in the feeding machine shell is used for feeding the pyrotechnic composition and conveying the pyrotechnic composition to the second conveying mechanism 210 in the drying machine shell, and the drying fan is used for drying the pyrotechnic composition on the second conveying mechanism 210. After the pyrotechnic composition is dried, the second conveying mechanism 210 transmits the pyrotechnic composition to the third conveying mechanism 310 in the cooling shell, the cooling fan 320 cools the pyrotechnic composition on the third conveying mechanism 310, and the third conveying mechanism 310 discharges the pyrotechnic composition after cooling. In order to ensure the safety of the drying operation, both ends of the drying chamber 200 are provided with a partition sealing device 400, the partition sealing device 400 includes a linear expansion mechanism 410 and a partition door 420 connected to the output end of the linear expansion mechanism 410, and the partition door 420 can close the drying chamber 200 under the driving of the linear expansion mechanism 410. When the drying operation is performed, the partition sealing device 400 enables the drying chamber 200 to be in a fully-closed state, so that the operation safety is ensured, and the potential safety hazard is eliminated. The control device is used for controlling the mechanisms to cooperatively complete work. The firework dryer is compact in structure, small in occupied area and high in working efficiency, and all the working procedures are connected with each other.

s10, after the firework to be dried is fed into the first conveying mechanism 110, driving the first motor to drive the first conveying mechanism 110 to move, and driving the second motor to drive the second conveying mechanism 210 to move, so that the firework to be dried is transferred to the second conveying mechanism 210;

the feeding mode of the first conveying mechanism 110 may be manual feeding or automatic feeding. The pyrotechnical material to be dried is fed onto the first conveyor 110 and transferred to the second conveyor 210.

S20, stopping the first motor and the second motor, starting the drying fan to perform drying operation, and simultaneously driving the linear telescopic mechanism 410 to extend the partition door 420 out to seal the drying chamber 200;

the linear expansion mechanism 410 extends the partition door 420 to close the drying chamber 200, which ensures the operation safety and meets the explosion-proof operation standard of smoke and fire drying. During the drying operation, the first conveying mechanism 110 continues to feed and is in a ready state.

S30, after the drying operation is performed for 0.5-2 hours, driving the linear telescopic mechanism 410 to retract the partition door 420, driving the first motor to drive the first conveying mechanism 110 to move, driving the second motor to drive the second conveying mechanism 210 to move, and driving the third motor to drive the third conveying mechanism 310 to move at the same time, so that the dried smoke and fire on the second conveying mechanism 210 is transferred to the third conveying mechanism 310; transferring new pyrotechnical fireworks to be dried on the first conveying mechanism 110 to the second conveying mechanism 210;

s40, stopping the first motor, the second motor and the third motor, starting the drying fan to perform drying operation, driving the linear telescopic mechanism 410 to extend the partition door 420 out of the drying chamber, and starting the cooling fan 320 to perform cooling operation;

wherein, except the first operation of starting up, the cooling operation and the drying operation are carried out simultaneously. The materials are circularly processed on each conveying mechanism.

S50, after the drying operation and the cooling operation are carried out for 0.5-2 hours at the same time, driving the linear telescopic mechanism 410 to retract the partition door 420, driving the first motor to drive the first conveying mechanism 110 to move, driving the second motor to drive the second conveying mechanism 210 to move, and driving the third motor to drive the third conveying mechanism 310 to move, so that the cooled firework on the third conveying mechanism 310 is discharged, and the dried firework on the second conveying mechanism 210 is transferred to the third conveying mechanism 310; the new pyrotechnical fire to be dried on the first conveying mechanism 110 is transferred to the second conveying mechanism 210, and the operation is circulated.

In the scheme, the control device controls the mechanisms to cooperatively complete the work. The feeding procedure, the drying procedure, the cooling procedure and the discharging procedure are mutually connected and integrally carried out. When the drying operation is performed, the partition sealing device 400 enables the drying chamber 200 to be in a fully-closed state, so that the operation safety is ensured, and the potential safety hazard is eliminated. The firework dryer is compact in structure, small in occupied area and high in working efficiency, and all the working procedures are connected with each other.

Preferably, the rotational speeds of the first motor, the second motor and the third motor are the same, so as to ensure that the movement distances of the three conveying mechanisms in unit time are the same. Further, sensing devices are arranged at two ends of the drying chamber, and the control method further comprises the following steps:

In this embodiment, in order to ensure that the drying chamber is in a closed state during operation and prevent the failure of the partition device, feedback adjustment is performed by the sensing device, and when detecting that both ends of the drying chamber are not closed, the drying blower is stopped.

Referring to fig. 2, as a preferred embodiment of the present invention, the partition sealing device 400 includes a partition frame, a linear expansion mechanism 410 is disposed at the top or bottom of the partition frame, a partition door 420 is slidably installed on the partition frame along the height direction of the drying chamber 200, and the partition door 420 is parallel to the width direction of the second conveying mechanism 210. The telescopic movement of the linear telescopic mechanism 410 causes the partition door 420 to close or open the drying chamber 200. The linear telescopic mechanism 410 may be an electric push rod, a hydraulic cylinder or a pneumatic cylinder.

Further, the side wall of the partition frame along the length direction of the second conveying mechanism 210 is provided with an opening, and the conveyor belt 112 penetrates through the opening. The height of the opening of the partition frame is not less than the height of the material to be dried, specifically, in this embodiment, the height of the opening of the partition frame is 6 to 10 times the diameter of the bright beads to be dried. Further, the width of the opening must not be smaller than the width of the second conveying mechanism 210, specifically, in the present embodiment, the width of the opening coincides with the partition frame width by 1.2 to 1.5 times the width of the second conveying mechanism 210.

Referring to fig. 3, the first conveying mechanism 110 preferably includes a conveying roller 111 and a conveying belt 112 wound around the conveying roller 111, wherein a plurality of cells 113 are disposed on the conveying belt 112, and the plurality of cells 113 are disposed at intervals along a conveying direction of the conveying belt 112. The unit cells 113 can conveniently contain the gunpowder and accelerate the feeding efficiency.

Further, the width of the unit cells 113 is identical to the width of the conveyor belt 112 or is 1 to 10cm smaller than the width of the conveyor belt 112, and surrounding barrier portions 114 are provided around the unit cells 113. In a preferred embodiment, the cells 113 may be square grids, and the cells 113 are disposed along the conveying direction of the conveyor 112. The cells 113 are arranged in square to facilitate manufacturing, and at the same time, the area utilization of the conveyor belt 112 can be improved. It is understood that the shape of the cells 113 is not limited to the square lattice shape given in the present embodiment, and other shapes of cells 113 capable of functioning as partitions are also within the scope of the present invention. The enclosure part 114 can perform an enclosure function on materials placed in the middle of the cells 113, such as a bright bead powder. In this embodiment, the surrounding barrier portions 114 disposed around the cells 113 form a groove in the middle of the cells 113, and can accommodate the bright beads for drying therein. In addition, a separation distance is preset between the adjacent unit cells 113 in the conveying direction, at which separation distance the separation device of the dryer is convenient to perform the separation process.

Referring to fig. 4, as an alternative embodiment of the present invention, the third conveying mechanism 310 is a belt conveying mechanism, and an upper transporting area 333 and a lower returning area 334 are formed on the third conveying mechanism 310; the cooling chamber 300 further comprises a cleaning device 330, the cleaning device 330 comprises at least one water inlet pipe 331 and a plurality of water outlet pipes 332 communicated with the water inlet pipe 331, the water inlet pipe 331 is arranged along the transmission direction of the third conveying mechanism 310, and the water outlet pipes 332 extend above and/or below the lower return zone 334; wherein, a side of the water outlet pipe 332 facing the lower return area 334 is provided with a plurality of water outlets. In addition, it is understood that the upper conveying area 333 and the lower return area 334 of the third conveying mechanism 310 are not limited to a specific structure of a certain section of the third conveying mechanism 310, and the area above for carrying the gunpowder to be dried belongs to the upper conveying area 333 in the present scheme, and the area below for returning to continue carrying the gunpowder to be dried belongs to the lower return area 334 in the present scheme during the operation of the third conveying mechanism 310.

In this embodiment, the cleaning device 330 includes at least one water inlet tube 331 and a plurality of water outlet tubes 332 connected to the water inlet tube 331, and a side of the water outlet tube 332 facing the lower return area 334 of the third conveying mechanism 310 is provided with a plurality of water outlets. The control method further includes:

when the pyrotechnic dryer stops working, the cleaning device 330 is started to clean the cooling chamber 300.

In this embodiment, the water outlet pipe 332 disposed above and/or below the lower return area 334 is provided with a plurality of water outlets on a side facing the lower return area 334 of the third conveying mechanism 310, so that the lower return area 334 of the third conveying mechanism 310 can be cleaned, and the third conveying mechanism 310 can also be cleaned during the drying process of the gunpowder bright beads. The invention can solve the technical problem of insufficient cleaning capability of the conveying device in the process of drying the gunpowder bright beads by arranging the cleaning device 330.

Preferably, the number of the water inlet pipes is 2, including a first water inlet pipe and a second water inlet pipe, the first water inlet pipe is disposed between the upper transport area 333 and the lower return area 334, and a water outlet pipe communicated with the first water inlet pipe is located above the lower return area 334 so as to clean the sides of the upper transport area 333 and the third conveying device 310; the second water inlet pipe is arranged below the lower return area 334, and the water outlet pipe communicated with the second water inlet pipe is arranged below the lower return area so as to clean the lower return area 334.

Preferably, the cooling chamber 300 may further be provided with a water tray disposed under the third conveying mechanism 310. The water receiving tray receives the sewage after cleaning and leads the sewage out of the environment. Further, the water outlets are provided with nozzles, and the nozzles are provided with a plurality of water outlet holes in different directions so as to increase the cleaning direction.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. A control method of a pyrotechnic dryer is applied to the pyrotechnic dryer, which is characterized in that,

the pyrotechnic dryer includes:

the control unit of the first motor, the second motor, the third motor, the drying fan, the cooling fan and the linear telescopic mechanism is respectively and electrically connected with the control device;

the first conveying mechanism comprises a conveying roller and a conveying belt wound on the conveying roller, a plurality of unit grids are arranged on the conveying belt, the unit grids are arranged at intervals along the conveying direction of the conveying belt, and the partition sealing device of the dryer is convenient to partition at the interval distance;

the partition sealing device comprises a partition frame, the linear telescopic mechanism is arranged at the top or the bottom of the partition frame, the partition door is slidably arranged on the partition frame along the height direction of the drying chamber, and the partition door is parallel to the width direction of the second conveying mechanism;

the control method comprises the following steps:

after the drying operation and the cooling operation are carried out for 0.5-2 hours at the same time, the linear telescopic mechanism is driven to retract the partition door, the first motor is driven to drive the first conveying mechanism to move, the second motor is driven to drive the second conveying mechanism to move, and the third motor is driven to drive the third conveying mechanism to move, so that the cooled firework on the third conveying mechanism is discharged, and the dried firework on the second conveying mechanism is transferred to the third conveying mechanism; transferring new smoke and fire to be dried on the first conveying mechanism to the second conveying mechanism, and performing cyclic operation according to the new smoke and fire to be dried;

the two ends of the drying chamber are provided with sensing devices, and the control method further comprises the following steps:

2. The control method according to claim 1, characterized in that the rotational speeds of the first motor, the second motor, and the third motor are the same.

3. The control method according to claim 1, wherein the partition frame is provided with an opening in a side wall in a longitudinal direction of the second conveying mechanism, and the conveyor belt penetrates the opening.

4. The control method according to claim 1, wherein the third conveying mechanism is a belt conveying mechanism, and an upper transport area and a lower return area are formed on the third conveying mechanism; the cooling chamber further comprises a cleaning device, the cleaning device comprises at least one water inlet pipe and a plurality of water outlet pipes communicated with the water inlet pipe, the water inlet pipes are arranged along the transmission direction of the third conveying mechanism, and the water outlet pipes extend to the upper part and/or the lower part of the lower return area; wherein, one side of the water outlet pipe facing the lower return area is provided with a plurality of water outlets; the control method further includes:

5. The control method according to claim 4, wherein the number of the water inlet pipes is 2, and the control method comprises a first water inlet pipe and a second water inlet pipe, wherein the first water inlet pipe is arranged between the upper transportation area and the lower return area, and the water outlet pipe communicated with the first water inlet pipe is positioned above the lower return area; the second water inlet pipe is arranged below the lower return area, and the water outlet pipe communicated with the second water inlet pipe is arranged below the lower return area.