A control method for a tea leaf preparation drying machine group

Abstract

The application discloses a control method of a drying unit for tea leaf preparation, which comprises four groups of drying assemblies, the tail part of the drying assembly is provided with a pellet combustion furnace, the pellet combustion furnaces of two adjacent groups are communicated through a heat recovery pipe, the heat recovery pipe is communicated with the air inlet of the pellet combustion furnace, the air inlet of the pellet combustion furnace is further provided with a three-way electric air valve, and the feeding ends of the four groups of drying units are communicated with the output end of a rubbing and twisting unit through a group of material conveying assemblies. The application sets four groups of drying assemblies, and the air inlets of the pellet combustion furnaces of two adjacent groups are communicated through a heat recovery pipe, so that the heat of the first group of drying assemblies can be transmitted to the inside of the second group of drying assemblies through the heat recovery pipe, a certain preheating effect is achieved, the temperature rising time of the second group of drying assemblies is reduced, the energy consumption of the whole drying unit is reduced, and energy recovery is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tea production and preparation, and particularly relates to a control method of a drying unit for tea preparation. BACKGROUND

[0002] The automation technology of tea drying machines has become increasingly common, mainly because automation can significantly improve production efficiency, ensure the consistency of product quality, and reduce labor costs. Automated tea drying machines are usually equipped with precise temperature sensors that can monitor and adjust the internal environment in real time. Through preset program algorithms, the machine can automatically adjust the temperature according to the type of tea and the desired drying level.

[0003] Proper temperature can ensure that tea is not overheated during the drying process, thereby avoiding the destruction of beneficial ingredients in tea, such as tea polyphenols, amino acids, and aroma compounds. If the temperature is too high, it will destroy the nutritional components of tea, and if it is too low, it will affect the drying effect. Secondly, the temperature during the drying process directly affects the fermentation level of the tea, which in turn affects the color and flavor of the tea. Precise temperature control can ensure that the tea ferments in the expected way, achieving the desired flavor and aroma. SUMMARY

[0004] The present application provides a drying unit for tea preparation and a control method thereof, which can effectively solve the above problems.

[0005] The present application is implemented as follows:

[0006] A drying unit for tea preparation, the drying unit comprises four groups of drying assemblies, the tail of the drying assembly is provided with a pellet combustion furnace, the pellet combustion furnaces of adjacent two groups are communicated through a heat recovery pipe, the heat recovery pipe is communicated with the air inlet of the pellet combustion furnace, the air inlet of the pellet combustion furnace is also provided with a three-way electric air valve, the feeding end of the four groups of drying units is communicated with the output end of the rolling machine group through a group of material conveying assemblies, and corresponding infrared thermal imaging cameras and photographing modules are arranged in the four groups of drying units.

[0007] As a further improvement, the feeding end of the drying unit is provided with a lifting assembly, the lifting assembly comprises a lifting frame and a conveying belt, one end of the lifting frame is communicated with the material conveying assembly, the end of the lifting frame away from the material conveying assembly is communicated with the feeding end of the drying unit, vertical adjusting grooves are arranged on the left and right sides of the lifting frame, sliding blocks are arranged in the vertical adjusting grooves, rotating rods are transversely arranged through the sliding blocks, threaded rods are vertically arranged through the sliding blocks, and rotating handles are arranged at the top ends of the threaded rods.

[0008] As a further improvement, the rotating rod is provided with at least four groups of sieve plates in a circumferential array, and the sieve plates are provided with sawtooth portions at one end away from the rotating rod, and a plurality of groups of sieve holes are transversely arranged on the plate surface of the sieve plates.

[0009] As a further improvement, the last group of the drying assembly is further provided with a tea aroma condenser pipe in a normally closed state.

[0010] As a further improvement, the material conveying assembly is provided with a visual module.

[0011] A control method of a drying machine group for tea leaf preparation, the infrared thermal imaging camera is used to identify the temperature of the tea leaves in different areas of the drying assembly, and obtain a temperature distribution area map, and send the obtained temperature distribution area map to the temperature control processor for analysis, if the difference between the lowest temperature area and the highest temperature area in the temperature distribution area map is greater than 15℃, the particle combustion furnace is immediately turned off and the rotating closure plate is opened, the heat in the detected drying machine group is transferred to the next group of drying machine group to be detected, after the temperature in the detected drying machine group is reduced, the tea leaves in the lowest temperature area are manually moved and fixed to the highest temperature area.

[0012] As a further improvement, the infrared thermal imaging camera can also detect the temperature inside the drying machine and transmit the detected temperature to the temperature control central device in real time, the temperature received by the temperature control central device is compared with the preset standard temperature, if the received temperature is lower than the preset standard temperature, a control command is sent to the particle combustion furnace connected to the corresponding drying machine to strengthen combustion, if the received temperature is higher than the preset standard temperature, a control command is sent to the particle combustion furnace connected to the corresponding drying machine to weaken combustion.

[0013] As a further improvement, the camera module is used to take pictures of the tea leaves inside the drying machine, and the taken pictures are transmitted to the image processor, the image processor receives the pictures and performs clarity enhancement processing on the images in the pictures, and finally compares the enhanced images with the preset standard images, if the similarity between the two is not less than 92%, a control command is sent to the drying machine to stop the drying process, if the similarity between the two is less than 92%, a control command is sent to the drying machine to continue the drying process, until the similarity between the two is not less than 92%.

[0014] As a further improvement, the visual module is used to take pictures of the tea leaves on the material conveying assembly and transmit the taken pictures to the screening processor, the screening processor receives the pictures and uniformly numbers the pictures into groups, then randomly selects at least three numbered groups, and according to the size of the tea particles in the selected numbered groups, if the proportion of small particles is greater than 30%, the rotating handle is rotated to drive the sliding block to descend and drive the rotating rod to lower.

[0015] The beneficial effects of the present application are: by setting four groups of drying assemblies, and the air inlets of the adjacent two groups of pellet combustion furnaces are communicated through the heat recovery pipes, which can make the heat of the first group of drying assemblies transmitted to the inside of the second group of drying assemblies through the heat recovery pipes, play a certain preheating role, reduce the heating time of the second group of drying assemblies, also reduce the energy consumption of the whole drying machine, realize the energy recovery, and by setting the three-way electric air valve at the air inlet of the pellet combustion furnace, the drying machine group can select to use the hot air discharged by the first drying machine group or fresh air according to the actual situation.

[0016] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application according to the embodiments. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor according to these drawings.

[0018] Figure 1 is the overall structure schematic diagram of a drying machine group for tea preparation and a control method thereof according to the present application;

[0019] Figure 2 is Figure 1 is an enlarged structure schematic diagram of A in the figure.

[0020] Reference signs:

[0021] 1-drying machine, 2-heat recovery pipe, 3-pellet combustion furnace, 4-lifting assembly, 401-vertical adjusting groove, 402-sliding block, 403-threaded rod, 404-rotating handle, 405-rotating rod, 406-sieve plate, 407-sieve hole, 408-sawtooth part, 5-material conveying assembly. DETAILED DESCRIPTION

[0022] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] In the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "top", "two ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] Referring to Figures 1-2 As shown in the drawings, the present embodiment provides a drying unit for tea leaf preparation, which comprises four groups of drying assemblies, the tail of the drying assembly is provided with a pellet combustion furnace 3, the air inlets of the pellet combustion furnaces 3 of two adjacent groups are communicated through a heat recovery pipe 2, the heat recovery pipe 2 communicates with the air inlets of the pellet combustion furnaces 3, the air inlets of the pellet combustion furnaces 3 are also provided with a three-way electric air valve, the inlet ends of the four groups of drying units are all communicated with the output ends of the rubbing and twisting machine group through a group of material conveying assemblies, and corresponding infrared thermal imaging cameras and photographing modules are arranged in the four groups of drying units.

[0025] By arranging four groups of drying assemblies, and communicating the air inlets of the pellet combustion furnaces 3 of two adjacent groups through the heat recovery pipe 2, the heat of the first group of drying assemblies can be transferred to the inside of the second group of drying assemblies through the heat recovery pipe 2, which plays a certain preheating role, reduces the heating time of the second group of drying assemblies, and also reduces the energy consumption of the overall drying machine 1, realizes the recovery of energy, and by arranging the three-way electric air valve at the air inlet of the pellet combustion furnace 3, the drying unit can select to use the hot air discharged by the first drying unit or fresh air according to the actual situation.

[0026] Further, the feeding end of the drying assembly is provided with a lifting assembly 4, which comprises a lifting frame and a conveying belt, one end of the lifting frame is communicated with the material conveying assembly 5, and the other end of the lifting frame away from the material conveying assembly 5 is communicated with the feeding end of the drying assembly, vertical adjusting grooves 401 are arranged on the left and right sides of the lifting frame, sliding blocks 402 are arranged in the vertical adjusting grooves 401, rotating rods 405 are transversely arranged through the sliding blocks 402, and threaded rods 403 are vertically arranged through the sliding blocks 402, and rotating handles 404 are arranged at the top ends of the threaded rods 403.

[0027] By arranging the vertical adjusting grooves 401 on the lifting frame and cooperating with the sliding blocks 402, the vertical adjustment of the rotating rods 405 is realized, and then the rotating rods 405 can perform different height scattering operations for different particle sizes or different varieties of tea leaves, and the applicability of the lifting assembly 4 as a whole is improved.

[0028] Further, at least four groups of sieve plates 406 are circumferentially arranged on the rotating rod 405, the end of the sieve plate 406 away from the rotating rod 405 is a sawtooth part 408, and a plurality of groups of sieve holes 407 are transversely arranged on the surface of the sieve plate 406.

[0029] By arranging the sieve plates 406 on the rotating rod 405, the adhesion of the tea leaves is dispersed, and then by arranging the end of the sieve plate 406 as a round sawtooth, the sieve plate 406 can scatter the tea leaves when rotating, and the integrity of the tea leaves is not easily damaged.

[0030] Further, the last group of the drying assembly is further provided with a tea aroma condenser pipe, and the tea aroma condenser pipe is in a normally closed state.

[0031] By arranging the tea aroma condenser pipe, the collection and recovery of tea aroma hot gas are realized.

[0032] Further, the material conveying assembly 5 is provided with a visual module.

[0033] A control method of a drying machine group for tea preparation is applied to the above-mentioned drying machine group for tea preparation, the infrared thermal imaging camera is used to identify the temperature of the tea leaves in different regions of the drying assembly, and a temperature distribution region map is obtained, the obtained temperature distribution region map is sent to a temperature control processor for analysis, if the difference between the lowest temperature region and the highest temperature region in the temperature distribution region map is greater than 15℃, the particle combustion furnace 3 is immediately turned off and the rotating sealing plate is opened, the heat in the detected drying assembly is transferred to the next group of drying assemblies to be detected, and after the temperature in the detected drying assembly is reduced, the tea leaves in the lowest temperature region are manually moved and fixed to the highest temperature region.

[0034] By setting the infrared thermal imaging camera to identify the temperature of the tea in different areas of the drying assembly, and then sending the temperature distribution area graph to the temperature control processor, the opening and closing of the pellet combustion furnace 3 and the rotating closure plate are controlled according to the results analyzed by the temperature control processor, ensuring that the temperature distribution inside the dryer 1 is uniform, and thus ensuring the drying effect of the tea.

[0035] Further, the infrared thermal imaging camera can also detect the temperature inside the dryer 1 and transmit the detected temperature to the temperature control central processor in real time. The temperature received by the temperature control central processor is compared with the preset standard temperature. If the received temperature is lower than the preset standard temperature, a control command is sent to the pellet combustion furnace 3 connected to the corresponding dryer 1 to strengthen combustion. If the received temperature is higher than the preset standard temperature, a control command is sent to the pellet combustion furnace 3 connected to the corresponding dryer 1 to weaken combustion.

[0036] By setting the infrared thermal imaging camera to cooperate with the temperature control central processor, the internal temperature of the dryer 1 is adjusted in real time, ensuring that the temperature inside the dryer 1 meets the drying requirements of the tea, and also allowing different degrees of drying according to different degrees of rolling of the tea, thereby enhancing the overall applicability of the machine group.

[0037] Further, the camera module is used to take pictures of the tea inside the dryer 1 and transmit the taken pictures to the image processor. After receiving the pictures, the image processor performs clarity enhancement processing on the images in the pictures. Finally, the enhanced images are compared with the preset standard images. If the similarity between the two is not less than 92%, a control command is sent to the dryer 1 to stop the drying process. If the similarity between the two is less than 92%, a control command is sent to the dryer 1 to continue the drying process until the similarity between the two is not less than 92%.

[0038] Further, the visual module is used to take pictures of the tea on the material conveying assembly 5 and transmit the taken pictures to the screening processor. After receiving the pictures, the screening processor uniformly numbers and groups the pictures, and then randomly selects at least three numbered groups. According to the size of the tea particles in the selected numbered groups, if the proportion of small particles is greater than 30%, the rotating handle 404 is rotated to lower the sliding block 402 and the rotating rod 405.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of a roaster group for tea leaf preparation, characterized by, The application discloses a drying unit applied to tea leaf preparation, which comprises four groups of drying assemblies, the tail of the drying assembly is provided with a pellet combustion furnace, the pellet combustion furnaces of two adjacent groups are communicated through a heat recovery pipe, the heat recovery pipe is communicated with an air inlet of the pellet combustion furnace, the air inlet of the pellet combustion furnace is further provided with a three-way electric air valve, the feeding end of the four groups of drying units is communicated with the output end of a rubbing and twisting machine group through a group of material conveying assemblies, and corresponding infrared thermal imaging cameras and photographing modules are arranged in the four groups of drying units. The feeding end of the drying unit is provided with a lifting assembly, the lifting assembly comprises a lifting frame and a conveying belt, vertical adjusting grooves are arranged on the left and right sides of the lifting frame, sliding blocks are arranged in the vertical adjusting grooves, rotating rods are transversely arranged in the sliding blocks, and threaded rods are vertically arranged in the sliding blocks. At least four groups of sieve plates are circumferentially arranged on the rotating rod, the end, away from the rotating rod, of the sieve plate is a sawtooth part, and a plurality of groups of sieve holes are transversely arranged on the surface of the sieve plate. A visual module is arranged on the material conveying assembly. The infrared thermal imaging camera is used for identifying the temperature of tea leaves in different regions of the drying assembly, obtaining a temperature distribution region map, sending the obtained temperature distribution region map to a temperature control processor for analysis, and if the difference between the lowest temperature region and the highest temperature region in the temperature distribution region map is greater than 15 DEG C, the pellet combustion furnace is immediately turned off and the rotating sealing plate is opened, the heat in the detected drying unit is transferred to the next group of drying units to be detected, and after the temperature in the detected drying unit is reduced, the tea leaves in the lowest temperature region are manually moved to the highest temperature region and are pressed.

2. The control method of the tea leaf preparation toaster set according to claim 1, characterized by, One end of the lifting frame is communicated with the material conveying assembly, and the other end of the lifting frame, away from the material conveying assembly, is communicated with the feeding end of the drying unit.

3. The control method of the tea leaf preparation toaster set according to claim 1, characterized by, The last group of drying assemblies is further provided with a tea aroma condensing pipe, and the tea aroma condensing pipe is in a normally closed state.

4. The control method of a tea leaf preparation dryer bank according to any one of claims 1 to 3, characterized in that, The infrared thermal imaging camera can also detect the temperature in the drying unit and transmit the detected temperature to a temperature control central device in real time, the temperature received by the temperature control central device is compared with a preset standard temperature, if the received temperature is lower than the preset standard temperature, a control command is sent to the pellet combustion furnace communicated with the corresponding drying unit to strengthen combustion, and if the received temperature is higher than the preset standard temperature, a control command is sent to the pellet combustion furnace communicated with the corresponding drying unit to weaken combustion.

5. The control method of a tea leaf preparation dryer bank according to any one of claims 1 to 3, characterized in that, The photographing module is used for taking photos of the tea leaves in the drying unit and transmitting the taken photos to an image processor, the image processor receives the photos and performs a definition enhancement process on the images in the photos, finally compares the enhanced images with a preset standard image, if the similarity between the two is not less than 92%, a control command is sent to the drying unit to stop the drying process, and if the similarity between the two is less than 92%, a control command is sent to the drying unit to continue the drying process until the similarity between the two is not less than 92%.

6. The control method of a tea leaf preparation dryer bank according to any one of claims 1 to 3, characterized in that, The visual module is used for taking pictures of tea leaves on the material conveying assembly and transmitting the taken pictures to a screening processor. After receiving the pictures, the screening processor uniformly numbers and groups the pictures, randomly selects at least three numbered groups, counts the size of tea particles in the selected numbered groups, and drives the sliding block to descend and the rotating rod to lower by rotating the rotating handle if the proportion of small-particle tea leaves is greater than 30%.

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