Drying unit for tea preparation and control method thereof

Abstract

The invention discloses a drying unit for tea preparation and a control method thereof.The drying unit comprises four drying assemblies, particle combustion furnaces are arranged at the tails of the drying assemblies, every two adjacent particle combustion furnaces are communicated through a heat recovery pipe, the heat recovery pipes are communicated with air inlets of the particle combustion furnaces, and the air inlets of the particle combustion furnaces are communicated with air outlets of the particle combustion furnaces. A three-way electric air valve is further arranged at an air inlet of the particle combustion furnace, and the feeding ends of the four drying units are communicated with the output end of the rolling unit through a conveying assembly. According to the drying device, the four drying assemblies are arranged, and air inlets of every two adjacent particle combustion furnaces communicate with each other through a heat recovery pipe, so that heat of the first drying assembly can be transmitted into the second drying assembly through the heat recovery pipe, and a certain preheating effect is achieved; and the temperature rising time of the second drying assembly is shortened, the energy consumed by the whole dryer is also reduced, and energy recovery is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of tea production and preparation, and in particular relates to a drying unit for tea preparation and a control method thereof. Background Art

[0002] Automation technology for tea drying machines has become increasingly common, mainly because automation can significantly improve production efficiency, ensure consistent 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 pre-programmed algorithms, the machine can automatically adjust the temperature according to the type of tea and the required drying degree.

[0003] The appropriate temperature can ensure that the tea leaves are not overheated during the drying process, thereby avoiding the destruction of the beneficial ingredients in the tea leaves, such as tea polyphenols, amino acids and aroma complexes. If the temperature is too high, it will destroy the nutritional components of the tea leaves, and if it is too low, it will affect the drying effect. Secondly, the temperature during the drying process directly affects the degree of fermentation of the tea leaves, and then affects the color and flavor of the tea leaves. Precise control of the temperature can ensure that the tea leaves are fermented as expected to achieve the ideal flavor and aroma. Summary of the invention

[0004] The present invention provides a drying machine group for preparing tea leaves and a control method thereof, which can effectively solve the above problems.

[0005] The present invention is achieved in that:

[0006] A drying machine group for preparing tea leaves, the drying machine group comprising four drying components, a pellet combustion furnace being arranged at the rear of the drying components, the pellet combustion furnaces of two adjacent groups being connected via a heat recovery pipe, the heat recovery pipe being connected to an air inlet of the pellet combustion furnace, a three-way electric air valve being arranged at the air inlet of the pellet combustion furnace, the feeding ends of the four drying units being connected to an output end of a kneading unit via a group of material transport components, and corresponding infrared thermal imaging cameras and camera modules being arranged in the four drying units.

[0007] As a further improvement, the feeding end of the drying group is provided with a lifting assembly, and the lifting assembly includes a lifting frame and a conveyor belt, one end of the lifting frame is connected with the material transport assembly, and the end of the lifting frame away from the material transport assembly is connected with the feeding end of the drying group, and vertical adjustment grooves are provided on the left and right sides of the lifting frame, and a sliding block is provided in the vertical adjustment groove, a rotating rod is horizontally penetrated by the sliding block, and a threaded rod is vertically penetrated by the sliding block, and a rotating handle is provided on the top of the threaded rod.

[0008] As a further improvement, at least four groups of sieve plates are arranged in a circular array on the rotating rod, one end of the sieve plate away from the rotating rod is a serrated portion, and a plurality of groups of sieve holes are distributed in a transverse array on the plate surface of the sieve plate.

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

[0010] As a further improvement, a visual module is provided on the material transport component.

[0011] A control method for a drying machine group for preparing tea leaves, wherein the infrared thermal imaging camera is used to identify the temperature of tea leaves in different areas of a drying component and obtain a temperature distribution area map, and the obtained temperature distribution area map is sent to a 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°C, the particle combustion furnace is immediately closed and a rotating sealing plate is opened to transfer the heat in the detected drying machine group to the next group of drying machines to be detected; after the temperature in the detected drying machine group is lowered, the tea leaves in the lowest temperature area are manually moved to and pressed near the highest temperature area.

[0012] As a further improvement, the infrared thermal imaging camera can also detect the temperature inside the dryer and transmit the detected temperature to the temperature control center in real time. The temperature control center compares the received temperature 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 dryer to strengthen the 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 dryer to weaken the combustion.

[0013] As a further improvement, the camera module is used to take pictures of the tea leaves inside the dryer and transmit the 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 to stop the drying process. If the similarity between the two is less than 92%, a control command is sent to the dryer 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 transport component and transmit the pictures to the screening processor. After receiving the pictures, the screening processor evenly numbers and groups the pictures, and then randomly selects at least three groups of numbered groups. The size of the tea leaves in the selected numbered groups is counted. If the proportion of small tea leaves is greater than 30%, the sliding block is driven down by turning the rotating handle, and the rotating rod is driven down as well.

[0015] The beneficial effects of the present invention are as follows: by setting four groups of drying components, and the air inlets of two adjacent groups of particle combustion furnaces are connected through a heat recovery pipe, such a setting can transfer the heat of the first group of drying components to the inside of the second group of drying components through the heat recovery pipe, which plays a certain preheating role, reduces the heating time of the second group of drying components, and also reduces the energy consumed by the overall dryer, thereby realizing energy recovery, and by setting a three-way electric air valve at the air inlet of the particle combustion furnace, it can be achieved that the drying unit can choose to use the hot air or fresh air discharged from the first drying unit according to actual conditions.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

[0019] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of A.

[0020] Reference numerals:

[0021] 1-dryer, 2-heat recovery pipe, 3-particle combustion furnace, 4-lifting assembly, 401-vertical adjustment slot, 402-sliding block, 403-threaded rod, 404-rotating handle, 405-rotating rod, 406-sieve plate, 407-sieve hole, 408-serrated part, 5-material transport assembly. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, the orientations or positional relationships indicated by terms such as "upper", "lower", "above", "both ends", etc. are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Reference Figure 1-2 As shown, the present embodiment provides a drying unit for preparing tea leaves, the drying unit comprising four drying components, a pellet combustion furnace 3 being arranged at the tail end of the drying component, the pellet combustion furnace 3 of two adjacent groups being connected via a heat recovery pipe 2, the heat recovery pipe 2 being connected to the air inlet of the pellet combustion furnace 3, the air inlet of the pellet combustion furnace 3 being further provided with a three-way electric air valve, the feeding ends of the four drying units are all connected to the output end of the kneading unit via a group of material transport components, and the four drying units are all provided with corresponding infrared thermal imaging cameras and camera modules.

[0025] By setting up four groups of drying components, and the air inlets of two adjacent groups of particle combustion furnaces 3 are connected through the heat recovery pipe 2, such a setting can transfer the heat of the first group of drying components to the inside of the second group of drying components through the heat recovery pipe 2, which plays a certain preheating role, reduces the heating time of the second group of drying components, and also reduces the energy consumed by the overall dryer 1, realizing energy recovery, and by setting a three-way electric air valve at the air inlet of the particle combustion furnace 3, it can be achieved that the drying unit can choose to use the hot air or fresh air discharged from the first drying unit according to actual conditions.

[0026] Furthermore, a lifting component 4 is provided at the feeding end of the drying component, and the lifting component 4 includes a lifting frame and a conveyor belt, one end of the lifting frame is connected with the material transport component 5, and the end of the lifting frame away from the material transport component 5 is connected with the feeding end of the drying component, and vertical adjustment grooves 401 are provided on the left and right sides of the lifting frame, and a sliding block 402 is provided in the vertical adjustment groove 401, and a rotating rod 405 is horizontally penetrated by the sliding block 402, and a threaded rod 403 is vertically penetrated by the sliding block 402, and a rotating handle 404 is provided at the top of the threaded rod 403.

[0027] By setting a vertical adjustment slot 401 on the lifting frame and cooperating with the sliding block 402, the vertical adjustment of the rotating rod 405 is achieved, so that the rotating rod 405 can perform different heights of breaking operations for different particle sizes or different varieties of tea, thereby improving the overall applicability of the lifting component 4.

[0028] Furthermore, at least four groups of sieve plates 406 are arranged in a circular array on the rotating rod 405, and the end of the sieve plate 406 away from the rotating rod 405 is a serrated portion 408. A plurality of groups of sieve holes 407 are distributed in a horizontal array on the plate surface of the sieve plate 406, and the serrated portion 408 is a round-headed serration.

[0029] By setting the sieve plate 406 on the rotating rod 405, the tea leaves can be dispersed. Secondly, by setting one end of the sieve plate 406 as round-headed serrations, the sieve plate 406 can break up the tea leaves when rotating without damaging the integrity of the tea leaves.

[0030] Furthermore, the drying component of the last group is also provided with a tea aroma condenser, and the tea aroma condenser is in a normally closed state.

[0031] By setting up a tea aroma condensation tube, the collection and recovery of tea aroma hot air is achieved.

[0032] Furthermore, the material transport component 5 is provided with a visual module.

[0033] A control method for a drying machine group for preparing tea leaves is applied to the above-mentioned drying machine group for preparing tea leaves, wherein the infrared thermal imaging camera is used to identify the temperature of tea leaves in different areas of a drying component and obtain a temperature distribution area map, and the obtained temperature distribution area map is sent to a 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°C, the particle combustion furnace 3 is immediately closed and the rotating sealing plate is opened to transfer the heat in the detected drying component to the next group of drying components to be detected. After the temperature in the detected drying component is lowered, the tea leaves in the lowest temperature area are manually moved to and pressed near the highest temperature area.

[0034] An infrared thermal imaging camera is set up to identify the temperature of tea leaves in different areas of the drying component, and then the temperature distribution area map is sent to the temperature control processor. According to the results analyzed by the temperature control processor, the opening and closing of the particle combustion furnace 3 and the rotating closing plate are controlled to ensure that the temperature distribution inside the dryer 1 is uniform, thereby ensuring the effect of tea drying.

[0035] Furthermore, the infrared thermal imaging camera can also detect the temperature inside the dryer 1 and transmit the detected temperature to the temperature control center in real time. The temperature control center compares the received temperature 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 3 connected to the corresponding dryer 1 to strengthen the combustion. If the received temperature is higher than the preset standard temperature, a control command is sent to the corresponding dryer 1 connected to the particle combustion furnace 3 to weaken the combustion.

[0036] By setting up an infrared thermal imaging camera in conjunction with a central temperature control device, the internal temperature of the dryer 1 can be adjusted in real time, ensuring that the temperature inside the dryer 1 meets the drying requirements of the tea leaves, and can also dry the tea leaves to different degrees according to different degrees of twisting, thereby enhancing the overall applicability of the unit.

[0037] Furthermore, the camera module is used to take pictures of the tea leaves inside the dryer 1, and transmit the pictures to the image processor. After receiving the pictures, the image processor 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 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] Furthermore, the visual module is used to take pictures of the tea leaves on the material transport component 5 and transmit the pictures to the screening processor. After receiving the pictures, the screening processor evenly numbers and groups the pictures, and then randomly selects at least three groups of numbered groups, and performs statistics based on the size of the tea leaves particles in the selected numbered groups. If the proportion of small tea leaves is greater than 30%, the sliding block 402 is driven down by rotating the rotating handle 404, and the rotating rod 405 is driven down.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drying unit for tea preparation, characterized in that: The drying unit includes four groups of drying components, a pellet combustion furnace is arranged at the rear of the drying components, the pellet combustion furnaces of two adjacent groups are connected through a heat recovery pipe, the heat recovery pipe is connected to 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 ends of the four groups of drying units are connected to the output end of the kneading unit through a group of material transport components, and the four groups of drying units are provided with corresponding infrared thermal imaging cameras and camera modules.

2. The drying unit for preparing tea leaves according to claim 1, characterized in that: The feeding end of the drying unit is provided with a lifting assembly, and the lifting assembly includes a lifting frame and a conveyor belt. One end of the lifting frame is connected with the material transport assembly, and one end of the lifting frame away from the material transport assembly is connected with the feeding end of the drying unit. Vertical adjustment grooves are provided on the left and right sides of the lifting frame, and a sliding block is provided in the vertical adjustment groove. A rotating rod is provided transversely through the sliding block, and a threaded rod is provided vertically through the sliding block, and a rotating handle is provided on the top of the threaded rod.

3. The drying unit for preparing tea leaves according to claim 2, characterized in that: At least four groups of sieve plates are arranged in a circular array on the rotating rod, one end of the sieve plate away from the rotating rod is a serrated portion, and a plurality of groups of sieve holes are distributed in a transverse array on the plate surface of the sieve plate.

4. The drying unit for preparing tea leaves according to claim 1, characterized in that: The drying component of the last group is also provided with a tea aroma condenser, and the tea aroma condenser is in a normally closed state.

5. The drying unit for preparing tea leaves according to claim 1, characterized in that: The material transport component is provided with a visual module.

6. A control method for a drying machine group for preparing tea leaves, characterized in that: Applied to a drying unit for tea preparation as described in any one of claims 1-5, the infrared thermal imaging camera is used to identify the temperature of tea leaves in different areas of the drying component and obtain a temperature distribution area map, and the obtained temperature distribution area map is sent 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°C, the particle combustion furnace is immediately turned off and the rotating closing plate is opened to transfer the heat in the detected drying unit to the next group of drying units to be detected. After the temperature in the detected drying unit is lowered, the tea leaves in the lowest temperature area are manually moved and pressed to the area close to the highest temperature.

7. The control method of the drying machine group for preparing tea leaves according to claim 6, characterized in that: The infrared thermal imaging camera can also detect the temperature inside the dryer and transmit the detected temperature to the temperature control center in real time. The temperature control center compares the received temperature 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 connected to the corresponding dryer to strengthen the combustion. If the received temperature is higher than the preset standard temperature, a control command is sent to the pellet combustion furnace connected to the corresponding dryer to weaken the combustion.

8. The control method of the drying machine group for preparing tea leaves according to claim 6, characterized in that: The camera module is used to take pictures of the tea leaves inside the dryer and transmit the pictures to the image processor. After receiving the pictures, the image processor 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 dryer to stop the drying process. If the similarity between the two is less than 92%, a control command is sent to the dryer to continue the drying process until the similarity between the two is not less than 92%.

9. The control method of the drying machine group for preparing tea leaves according to claim 6, characterized in that: The visual module is used to take pictures of the tea leaves on the material transport component and transmit the pictures to the screening processor. After receiving the pictures, the screening processor evenly numbers and groups the pictures, and then randomly selects at least three groups of numbered groups. The sizes of the tea leaves in the selected numbered groups are counted. If the proportion of small tea leaves is greater than 30%, the sliding block is driven down by rotating the rotating handle, and the rotating rod is driven down as well.

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