Processing method of dried longan
Through electron microscopy analysis and classification technology, different varieties of longans are accurately classified and the drying process is adjusted, which solves the problem of low consistency of longan dry quality and achieves efficient and safe longan dry production.
Patent Information
- Application Number
- CN202411616180.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-02-25
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Due to the wide variety of longans, it is difficult to achieve uniform effect during the drying process, resulting in excessive drying and partial insufficient, affecting product quality and consistency.
Longan is analyzed by electron microscopy through electron microscope, and its varieties are judged and classified. Then, the drying process parameters are adjusted according to different varieties to ensure that the dry longan of each variety can achieve the best drying effect.
It achieves the quality consistency and production efficiency of longan dry, reduces production costs, and enhances product traceability and quality safety.
Smart Images
Figure CN119498493A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for processing dried longan. Background Art
[0002] Longan is commonly known as "Guiyuan". Historically, it has been called "Guiyuan" in the south and "Ginseng" in the north. Longan is rich in nutrients and is deeply loved by people. It is also regarded as a precious tonic. Its nourishing function is obvious. Dried longan was born. The processing of dried longan usually includes steps such as material selection, pretreatment, drying, grading and packaging. However, in actual operation, due to the wide variety of longan varieties, different varieties of longan have differences in size, shape, sugar content, moisture content, etc., which makes it difficult to achieve a uniform drying effect during the baking process.
[0003] Because different varieties of longan have different internal structures and water contents, different varieties of longan require different drying times and temperatures during baking. If all varieties of longan are mixed together for baking, some longan will be over-dried while others will be under-dried, thus affecting the quality of the final product. Different varieties of longan also differ in taste and flavor. If all varieties of longan are mixed together for processing, it will be difficult to ensure the consistency of the quality of the final product.
[0004] In summary, the low consistency of the quality of dried longan has become a problem that needs to be solved urgently by technicians in this field. Therefore, it is necessary to propose a processing method for dried longan. Summary of the invention
[0005] In order to solve the above problems, the purpose of the present invention is to provide a processing method for dried longan, which uses an electron microscope probe and an electron microscope to perform electron microscope analysis on longan to determine the type and classify it, thereby improving the quality consistency of subsequent processing.
[0006] In order to achieve the above object, the technical solution of the present invention is as follows: a method for processing dried longan, comprising the following steps:
[0007] Step 1: pretreatment; Step 2: classification of varieties, preparing classification boxes, placing the pretreated longan into the classification boxes for classification of varieties, and then adjusting the process parameters of subsequent steps for different varieties of longan; Step 3: blanching; Step 4: drying; Step 5: baking; Step 6: drying again; Step 7: grading and packaging;
[0008] The invention is characterized in that: the classification box comprises a feeding box and a box cover, the box cover is detachably connected to the top of the classification box, the feeding box is fixedly connected to the top of the inner wall of the classification box, one side of the bottom of the feeding box is respectively fixedly connected with an inclined leak plate and an electric telescopic door, the inner bottom wall of the classification box is detachably connected with a waste box, the waste box is located at the bottom of the leak plate, a laser transmitting head and a laser receiving head are respectively fixedly connected to the outer wall of the electric telescopic door, a transparent plate is hinged on the inner wall of the classification box, an electron microscope probe and an electron microscope instrument for judging the rolling of a single longan are fixedly connected on the upper and lower sides of the transparent plate, and a plurality of probes and an electron microscope for detecting a single longan are fixedly connected on the inner wall of the classification box at the bottom of the transparent plate A pressure sensor for weight, an electric cylinder is fixedly connected to the inner wall of the classification box at the bottom of the pressure sensor, the output end of the electric cylinder faces the side of the transparent plate away from the hinge, a rolling groove is fixedly connected to the inner wall of the classification box close to the bottom of the transparent plate away from the electric cylinder, a plurality of collection boxes for collecting different kinds of longan are detachably connected to the bottom of the rolling groove, a plurality of electric valves are fixedly connected to the bottom of the rolling groove, and the plurality of electric valves are connected to the collection box, a display screen and a controller are fixedly connected to the outer walls of the classification box, respectively, and an electric telescopic door, a laser transmitting head, a laser receiving head, a pressure sensor, an electric cylinder, an electronic microscope, an electric valve and a display screen are all electrically connected to the controller.
[0009] Furthermore, in step 2, a longan variety library is preset in the controller, and the controller is used to determine the longan variety and classify and collect it based on a comprehensive comparison of the tortoise-shaped patterns, radiation lines, tumor-like protrusions, prickles and outer peel pores collected by the electron microscope probe and the electron microscope with the longan variety library.
[0010] Furthermore, in step 1, the longans are cut from the fruit clusters, leaving the stems at a length of 1.5 to 2 mm, broken fruits are removed, and the longans are placed in a bamboo basket and then soaked in clean water for 5 to 10 minutes.
[0011] Furthermore, in step three, the longan is blanched in 95° C. hot water for 2 to 3 minutes, and then taken out and drained.
[0012] Furthermore, in step 4, the blanched longan is sent to a hot air dryer and dried at a temperature of 60-70° C. to a moisture content of 15%-20%.
[0013] Furthermore, in step 5, when the longan is dried to a water content of about 20%, the fruit stems are cut off and the longans are piled together for baking.
[0014] Furthermore, in step six, the baked longan is again sent to the hot air dryer and dried at a temperature of 50-60° C. until the final moisture content requirement of 10%-15% is reached.
[0015] Furthermore, in step seven, the dried longan is graded according to the quality standards of color, size and shape, and then sealed and packaged using a vacuum packaging machine.
[0016] Furthermore, during the fruit baking process in step 5, a sealed fruit baking container is used, and a humidity regulator is placed in the container to control the humidity change during the fruit baking process.
[0017] Furthermore, the processing also includes quality monitoring. Sampling and testing are carried out during the drying, baking and re-drying stages. At the same time, a quality traceability system is established in the controller to record the processing process, raw material source and test results of each batch of dried longan. The monitoring results include moisture content, color, taste and microbial indicators.
[0018] The following principles and beneficial effects are achieved by adopting the above scheme:
[0019] 1. The method for processing dried longan provided by the present invention realizes accurate classification of longan varieties through advanced electron microscope analysis technology. In the variety classification step, the electron microscope probe and electron microscope in the classification box are used to perform electron microscope analysis on the pre-treated longan, and the characteristic information of the tortoise-shaped pattern, radiation, tumor-like protrusion, prickles and outer peel pores on its surface are collected. This information is then compared with the longan variety library preset in the controller to accurately determine the variety of longan, and through the synergistic effect of mechanisms such as electric telescopic doors, electric cylinders and electric valves, different varieties of longan are classified and collected into corresponding collection boxes. In the subsequent processing steps, for different varieties of longan, the process parameters such as blanching, drying, baking and re-drying can be adjusted according to their characteristics to ensure that each variety of dried longan can achieve the best drying effect and quality.
[0020] 2. The automated variety classification and collection process of the present invention greatly improves production efficiency, reduces manual intervention and errors, and reduces production costs.
[0021] 3. The present invention establishes a quality traceability system in the controller to record information such as the processing process, raw material sources and test results of each batch of dried longan, thereby enhancing the traceability and quality safety of the product.
[0022] 4. The present invention improves the quality and taste of dried longan through precise classification and optimized processing, making it more in line with market demand and enhancing the added value and market competitiveness of the product.
[0023] 5. The present invention adopts the most suitable processing technology for different varieties of longan, which can avoid unnecessary energy consumption and waste, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a flow chart of an embodiment of the present invention.
[0025] Figure 2 It is an axonometric diagram of an embodiment of the present invention.
[0026] Figure 3It is a side cross-sectional view of an embodiment of the present invention.
[0027] The figure marks in the drawings of the specification include: 1. box cover; 2. classification box; 3. display screen; 4. controller; 5. collection box; 6. waste box; 7. feed box; 8. laser transmitter head; 9. electric telescopic door; 10. leak plate; 11. laser receiving head; 12. electric cylinder; 13. transparent plate; 14. electron microscope probe; 15. pressure sensor; 16. rolling groove; 17. electric valve; 18. electron microscope. DETAILED DESCRIPTION
[0028] The following is further described in detail through specific implementation methods:
[0029] Example 1
[0030] Basically as attached Figure 1 As shown: A method for processing dried longan, comprising the following steps:
[0031] Step 1: Pretreatment: cut the longan from the fruit cluster, leaving a stem length of 1.5 to 2 mm, remove the broken fruits, put the longan in a bamboo basket, and then soak it in clean water for 5 to 10 minutes.
[0032] Step 2, variety classification, prepare classification box 2, put the pre-treated longan into classification box 2 for variety classification, and then adjust the process parameters of subsequent steps according to different varieties of longan.
[0033] Step three, blanch the longan in 95℃ hot water for 2 to 3 minutes, then remove and drain.
[0034] Step 4: drying: the blanched longan is sent to a hot air dryer and dried at a temperature of 60-70° C. to a moisture content of 15%-20%.
[0035] Step 5, baking the fruit. When the longan is dried to a moisture content of about 20%, cut off the fruit stems and pile the longans together for baking. Use a sealed baking container and place an appropriate amount of humidity regulator such as calcium chloride in the container to control the humidity changes during the baking process.
[0036] Step six, drying again, sending the baked longan into the hot air dryer again, and drying it at a temperature of 50-60° C. until the final moisture content requirement of 10%-15% is reached.
[0037] Step seven, grading and packaging. The dried longan is graded according to the quality standards of color, size, and shape, and then sealed and packaged using a vacuum packaging machine.
[0038] The processing also includes quality monitoring. Sampling and testing are carried out during the drying, baking and re-drying stages. At the same time, a quality traceability system is established in the controller 4 to record the processing process, raw material source and test results of each batch of dried longan. The monitoring results include moisture content, color, taste and microbial indicators.
[0039] Specific implementation steps:
[0040] First, cut the longan from the fruit cluster, making sure to leave the stem length of 1.5 to 2 mm. This length is convenient for subsequent processing and can maintain the integrity of the longan. Remove the broken fruits to ensure the appearance and quality of the final product. Put the longan in a bamboo basket and then soak it in clean water for 5 to 10 minutes. The purpose of this step is to clean the surface of the longan and remove any dust and pesticide residues that may be attached.
[0041] Prepare a classification box 2 to classify the longan according to its variety. This step is essential to maintain product consistency and meet market demand. The controller 4 and the preset longan variety library can be used for automated classification to improve the accuracy and efficiency of classification. Blanch the longan in 95°C hot water for 2 to 3 minutes. This step can kill microorganisms on the surface of the longan and make it easier to peel and dry the longan. Drain the water after taking it out to avoid excessive moisture in the subsequent drying process affecting the quality. Send the blanched longan to a hot air dryer and dry it at a temperature of 60 to 70°C to a moisture content of 15% to 20%. This step is to remove most of the moisture in the longan and make it semi-dry for subsequent processing.
[0042] When the longan is dried to a moisture content of about 20%, cut off the stems. Pile the longans together for baking, use a sealed baking container, and place an appropriate amount of humidity regulator such as calcium chloride in the container. The purpose of this step is to redistribute the sugar and moisture inside the longan and improve the taste and color of the product. The baked longan is sent to the hot air dryer again and dried at a temperature of 50-60°C until the final moisture content requirement of 10%-15% is reached. This step is to remove the remaining moisture so that the dried longan can reach the ideal storage state. The dried longan is graded according to the quality standards of color, size, and shape. This step can ensure the consistency of the product and meet the different needs of consumers. Use a vacuum packaging machine for sealed packaging to extend the shelf life of the product and maintain its quality.
[0043] Sampling and testing are carried out during the drying, baking and re-drying stages to monitor the moisture content, color, taste and microbiological indicators of the product. This step is an important measure to ensure product quality and safety. A quality traceability system is established in controller 4 to record the processing process, raw material source and test results of each batch of dried longan. This helps to trace and solve problems in a timely manner when problems arise.
[0044] Example 2
[0045] Basically as attached Figure 2 and Figure 3 As shown: The difference from the above embodiment is that the classification box 2 includes a feed box 7 and a box cover 1, the box cover 1 is detachably connected to the top of the classification box 2, the feed box 7 is fixedly connected to the top of the inner wall of the classification box 2 by bolts, and one side of the bottom of the feed box 7 is respectively fixedly connected with an inclined leak plate 10 and an electric telescopic door 9 by bolts, the inner bottom wall of the classification box 2 is detachably connected with a waste box 6, the waste box 6 is located at the bottom of the leak plate 10, and the outer wall of the electric telescopic door 9 is respectively fixedly connected with a laser transmitting head 8 and a laser receiving head 11 by bolts, and a transparent plate 13 is hinged on the inner wall of the classification box 2, and the upper and lower sides of the transparent plate 13 are fixedly connected with an electron microscope probe 14 and an electron microscope instrument 18 for judging the rolling of a single longan by bolts.
[0046] A plurality of pressure sensors 15 for detecting the weight of a single longan are fixedly connected to the inner wall of the classification box 2 at the bottom of the transparent plate 13 by bolts, an electric cylinder 12 is fixedly connected to the inner wall of the classification box 2 at the bottom of the pressure sensor 15 by bolts, the output end of the electric cylinder 12 faces the side of the transparent plate 13 away from the hinge, a rolling groove 16 is fixedly connected to the inner wall of the classification box 2 close to the bottom of the transparent plate 13 away from the electric cylinder 12 by bolts, a plurality of collection boxes 5 for collecting different kinds of longans are detachably connected to the bottom of the rolling groove 16, a plurality of electric valves 17 are fixedly connected to the bottom of the rolling groove 16 by bolts, and the plurality of electric valves 17 are connected to the collection box 5, a display screen 3 and a controller 4 are fixedly connected to the outer wall of the classification box 2 by bolts, respectively, and an electric telescopic door 9, a laser transmitting head 8, a laser receiving head 11, a pressure sensor 15, an electric cylinder 12, an electric microscope 18, an electric valve 17 and a display screen 3 are all electrically connected to the controller 4.
[0047] The controller 4 is preset with a longan variety library, and the controller 4 is used to judge the longan variety and classify and collect it according to the comprehensive comparison of the tortoise-shaped patterns, radiation lines, tumor-like protrusions, prickles and pores of the outer fruit peel collected by the electron microscope probe 14 and the electron microscope 18 with the longan variety library.
[0048] Table 1 Longan variety library
[0049]
[0050] Specific implementation steps:
[0051] Open the lid 1 of the classification box 2 and pour the pre-treated longan into the feed box 7. The inclined leak plate 10 at the bottom of the feed box 7 is designed to allow the longan to slide smoothly to the electric telescopic door 9 at the bottom. When the longan rolls to the electric telescopic door 9, the electric telescopic door 9 is started to open, the laser transmitter 8 emits laser, and the laser receiver 11 receives the signal. The controller 4 determines whether a single longan passes through the electric telescopic door 9 based on the laser signal, and then closes the electric telescopic door 9, and the longan falls onto the transparent plate 13.
[0052] When the longan stays on the transparent plate 13, the electron microscope probe 14 and the electron microscope instrument 18 collect the characteristics of the longan, such as the turtle-shaped pattern, radiation, tumor-like protrusions, prickles and pores of the outer skin. The controller 4 is preset with a longan variety library as shown in Table 1, and the controller 4 compares the collected characteristics with the data in the variety library. At the same time, the pressure sensor 15 detects the weight of the longan and provides weight data for classification.
[0053] According to the data of the electron microscope probe 14, the electron microscope instrument 18 and the pressure sensor 15, the controller 4 determines the variety of the longan. The controller 4 pushes the unhinged side of the transparent plate 13 through the electric cylinder 12, so that the longan rolls from the rolling groove 16 to the corresponding collection box 5. The controller 4 also controls the corresponding electric valve 17 to open, and the longan falls into the designated collection box 5. For longan that does not meet the particle size standard, they will fall into the waste box 6 at the bottom through the leak plate 10.
[0054] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A method for processing dried longan, comprising the following steps: Step 1: pretreatment; Step 2: classification of varieties, preparing a classification box (2), placing the pretreated longan into the classification box (2) for variety classification, and then adjusting the process parameters of subsequent steps according to different varieties of longan; Step 3: blanching; Step 4: drying; Step 5: baking; Step 6: drying again; Step 7: grading and packaging; The classification box (2) is characterized in that: the classification box (2) comprises a feed box (7) and a box cover (1), the box cover (1) is detachably connected to the top of the classification box (2), the feed box (7) is fixedly connected to the top of the inner wall of the classification box (2), one side of the bottom of the feed box (7) is respectively fixedly connected with an inclined leak plate (10) and an electric telescopic door (9), the inner bottom wall of the classification box (2) is detachably connected with a waste box (6), the waste box (6) is located at the bottom of the leak plate (10), the outer wall of the electric telescopic door (9) is respectively fixedly connected with a laser transmitter (8) and a laser receiver (11), a transparent plate (13) is hinged on the inner wall of the classification box (2), the upper and lower sides of the transparent plate (13) are fixedly connected with an electronic microscope probe (14) and an electronic microscope (18) for judging the rolling of a single longan, and a plurality of pressure sensors (15) for detecting the weight of a single longan are fixedly connected to the inner wall of the classification box (2) at the bottom of the transparent plate (13). ), an electric cylinder (12) is fixedly connected to the inner wall of the classification box (2) at the bottom of the pressure sensor (15), the output end of the electric cylinder (12) faces the side of the transparent plate (13) away from the hinge, a rolling groove (16) is fixedly connected to an inner wall of the classification box (2) close to the bottom of the transparent plate (13) away from the electric cylinder (12), a plurality of collection boxes (5) for collecting different types of longan are detachably connected to the bottom of the rolling groove (16), a plurality of electric valves (17) are fixedly connected to the bottom of the rolling groove (16), and the plurality of electric valves (17) are all connected to the collection box (5), a display screen (3) and a controller (4) are fixedly connected to the outer wall of the classification box (2), and the electric telescopic door (9), the laser transmitting head (8), the laser receiving head (11), the pressure sensor (15), the electric cylinder (12), the electric mirror (18), the electric valve (17) and the display screen (3) are all electrically connected to the controller (4).
2. The method for processing dried longan according to claim 1, characterized in that: In step 2, a longan variety library is preset in the controller (4), and the controller (4) is used to judge the longan variety and classify and collect it according to the comprehensive comparison of the tortoise-shaped patterns, radiation lines, tumor-like protrusions, prickles and pores of the outer fruit peel collected by the electron microscope probe (14) and the electron microscope (18) with the longan variety library.
3. The method for processing dried longan according to claim 2, characterized in that: In step one, cut the longan from the fruit cluster, leaving a stem length of 1.5 to 2 mm, remove the broken fruits, put the longan in a bamboo basket, and then soak it in clean water for 5 to 10 minutes.
4. The method for processing dried longan according to claim 3, characterized in that: In step 3, blanch the longan in 95°C hot water for 2 to 3 minutes, then remove and drain.
5. The method for processing dried longan according to claim 4, characterized in that: In step 4, the blanched longan is sent to a hot air dryer and dried at a temperature of 60-70° C. to a moisture content of 15%-20%.
6. The method for processing dried longan according to claim 5, characterized in that: In step 5, when the longan is dried to a water content of about 20%, the fruit stems are cut off and the longans are piled together for baking.
7. The method for processing dried longan according to claim 6, characterized in that: In step 6, the baked longan is sent to the hot air dryer again and dried at a temperature of 50-60° C. until the final moisture content requirement of 10%-15% is reached.
8. The method for processing dried longan according to claim 7, characterized in that: In step seven, the dried longan is graded according to the quality standards of color, size, and shape, and then sealed and packaged using a vacuum packaging machine.
9. The method for processing dried longan according to claim 8, characterized in that: During the fruit baking process in step 5, a sealed fruit baking container is used and a humidity regulator is placed in the container to control the humidity change during the fruit baking process.
10. The method for processing dried longan according to claim 9, characterized in that: The processing also includes quality monitoring. The quality monitoring includes sampling and testing during the drying, baking and re-drying stages. At the same time, a quality traceability system is established in the controller (4) to record the processing process, raw material source and test results of each batch of dried longan. The monitoring results include water content, color, taste and microbial indicators.