Electric heating constant temperature blast drying oven for processing rhizoma polygonati tea

Abstract

This invention relates to an electric constant-temperature forced-air drying oven for processing Polygonatum odoratum tea, belonging to the field of drying oven technology. It addresses the problem of drying ovens lacking active cleaning devices for filters and heating elements, leading to impurity accumulation during operation that reduces heat transfer and heating efficiency. Furthermore, the inability to intervene online forces equipment to shut down for maintenance or operate at low temperatures, severely impacting processing quality and efficiency. The invention includes a cabinet with a hinged door on its surface, a material support frame inserted into the inner wall of the cabinet, and a mounting frame fixedly connected to the bottom inner wall of the cabinet. A heating chamber is fixedly connected to one side of the mounting frame. This invention can self-clean the circulating air filter online and collect impurities directionally, eliminating the need for frequent disassembly and cleaning. It actively scrapes away deposits on the surface of the heating elements, delaying heat conduction attenuation and ensuring stable drying temperature. It can also rotate the heating elements to compensate for heat exchange capacity, avoiding downtime or low-temperature processing, thus ensuring the quality of the finished Polygonatum odoratum tea and continuous production efficiency.

Description

Technical Field

[0001] This invention relates to the field of drying oven technology, specifically to an electric constant temperature forced-air drying oven for processing Polygonatum odoratum tea. Background Technology

[0002] The electric constant temperature forced air drying oven for processing Polygonatum sibiricum tea is a commonly used forced hot air circulation constant temperature drying equipment in the field of primary processing of Chinese medicinal materials. It is the core drying equipment after the fixation and steaming of Polygonatum sibiricum tea. It generates heat energy through electric heating, and forms a uniform circulating hot airflow with the built-in forced air structure. In the precisely temperature-controlled sealed cavity, the free moisture in Polygonatum sibiricum slices and tea strips is slowly removed. At the same time, by adjusting the appropriate temperature, the medicinal active ingredients such as Polygonatum sibiricum polysaccharides and saponins can be preserved to the greatest extent. Compared with natural sun drying, it is not limited by the weather, and the drying efficiency and consistency of the finished product are significantly improved.

[0003] Currently, when impurities accumulate on the filter screen of the blower drying oven, there is a lack of active intervention devices, making it difficult to clean the impurities on the filter screen surface during equipment operation. This leads to a decrease in heat transfer efficiency. At the same time, polysaccharides and impurities generated during the drying process of Polygonatum odoratum accumulate on the heating tubes, affecting the heat conduction effect of the heating unit. Furthermore, when the heat conduction efficiency of the heating components has been reduced to the critical point due to severe contamination, the lack of active intervention devices forces the equipment to be shut down for maintenance or to complete the processing operation at the reduced temperature, thus lowering the quality of the processing.

[0004] To address the above issues, an electrically heated constant-temperature forced-air drying oven for processing Polygonatum odoratum tea was proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an electric constant temperature forced-air drying oven for processing Polygonatum odoratum tea. By using this device, the problem in the above-mentioned background is solved: existing forced-air drying ovens lack a filter screen and an active cleaning device for impurities in the heating tubes, which leads to the accumulation of impurities during equipment operation, reducing heat transfer and heating efficiency, and the inability to intervene online, forcing the equipment to be shut down for maintenance or operated at low temperature, which seriously affects the processing quality and efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electric constant temperature forced-air drying oven for processing Polygonatum sibiricum tea, comprising a box body, a door hinged to the surface of the box body, a material support frame inserted into the inner wall of the box body, a mounting frame fixedly connected to the bottom inner wall of the box body, a heating chamber fixedly connected to one side surface of the mounting frame, a side surface of the heating chamber fixedly connected to the inner wall of the box body, a heating adjustment component inserted into the interior of the heating chamber, a pipe wall cleaning component slidably connected to one end surface of the heating adjustment component, the pipe wall cleaning component being inserted into the mounting frame, a filter self-cleaning component fixedly connected to the bottom surface of the heating chamber, and an air outlet fixedly connected to the inner wall of the box body.

[0007] Furthermore, the filter self-cleaning assembly includes a filter chamber frame fixedly connected to the bottom surface of the heating chamber. Multiple rotating sleeves are rotatably connected to the inner wall of the filter chamber frame. An air guide tube is rotatably connected to the bottom of the rotating sleeve. A circulating air connection pipe is fixedly connected to the bottom of the air guide tube. One end of the circulating air connection pipe is fixedly connected to the inner wall of the housing.

[0008] Furthermore, an annular dust collection groove is elastically connected to the inner wall of the air guide duct, a corrugated plate is fixedly connected to the surface of the filter frame, a fixing rib is fixedly connected to the surface of the corrugated plate, and a central fixing shaft is fixedly inserted into the axial middle section of the fixing rib.

[0009] Furthermore, a pin is fixedly connected to the axial middle section surface of the central fixed shaft, and a stainless steel sintered filter screen is fixedly connected to the surface of the pin. The edge of the stainless steel sintered filter screen is fixedly connected to the inner wall of the rotating sleeve. Multiple corrugated plates are rotatably connected to the surface of the central fixed shaft. The bottom ends of the multiple corrugated plates are fixedly connected to the surface of the central fixed shaft, and the top corrugated plates of the multiple corrugated plates are all fixedly connected to the inner wall of the rotating sleeve. The corrugated plates between the bottom and top corrugated plates can be freely unfolded.

[0010] Furthermore, a micro servo motor is fixedly connected inside the filter chamber frame, and a drive wheel is fixedly connected to the output end of the micro servo motor. A driven arc-shaped gear ring is fixedly connected to the surface of the rotating sleeve, and the driven arc-shaped gear ring meshes with the drive wheel. Multiple elastic protrusions are fixedly connected to the side wall of the rotating sleeve, and the tops of the multiple elastic protrusions are in contact with the surface of the corrugated plate.

[0011] Furthermore, the pipe wall descaling assembly includes an electric push rod inserted into the side wall of the mounting bracket. A transmission telescopic rod is slidably connected inside the electric push rod. A guide tube is fixedly connected to one end surface of the electric push rod, and a grooved rotating rod is rotatably connected inside the guide tube.

[0012] Furthermore, the grooved rotating rod is rotatably connected to a rotating sleeve inside, and the inside of the rotating sleeve is fixedly sleeved with a transmission telescopic rod. A fixing pin is inserted into the surface of the guide tube, and the end of the fixing pin is in contact with the groove on the surface of the grooved rotating rod. A drive gear is fixedly connected to the output end of the grooved rotating rod, and a fixing plate is rotatably connected to the surface of the output end of the grooved rotating rod.

[0013] Furthermore, a fixed outer ring frame is fixedly connected to one end of the fixed plate, and a rotating inner ring frame is rotatably connected inside the fixed outer ring frame. A driven gear ring is fixedly connected to the surface edge of the rotating inner ring frame, and multiple pipe wall scraping blocks are fixedly connected to the inner wall of the rotating inner ring frame.

[0014] Furthermore, the heating adjustment assembly includes multiple pull rods that penetrate the inner wall of the heating chamber, each pull rod having a transmission external thread on its surface, a transmission plate fixedly sleeved at one end of each pull rod, and multiple drive motors fixedly connected to one side surface of the mounting bracket.

[0015] Furthermore, each of the output ends of the multiple drive motors is fixedly connected to a connecting rod, one end of which is fixedly connected to a transmission plate. Multiple transmission threaded sleeves are threadedly connected to the surface of the external transmission threaded sleeves, and independent electric heating tubes are fixedly connected to the surface of the multiple transmission threaded sleeves. The transmission threaded sleeves are eccentrically positioned inside the independent electric heating tubes, and buffer connecting rings are fixedly connected to the sidewalls of the independent electric heating tubes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves online self-cleaning and directional collection of impurities in the circulating air filter, maintaining filtration performance and ventilation efficiency without shutdown. A rotating sleeve drives the stainless steel sintered filter to twist and deform, which, combined with intermittent vibration from the corrugated plate and elastic protrusions, shakes off the dust and polysaccharide particles intercepted on the filter surface. Simultaneously, the localized backflow airflow generated by the closing of the corrugated plate assists in dust removal and sealing, ensuring that all detached impurities are collected in a ring-shaped dust collection trough, preventing secondary pollution. This invention not only ensures unobstructed circulating airflow and reduces heat transfer resistance but also eliminates the need for frequent disassembly and filter cleaning, significantly extending the equipment's continuous operating time.

[0017] By setting up a mechanical structure that links axial propulsion and circumferential rotation, the scraping block on the tube wall moves spirally along the surface of the heating tube. Combined with the characteristics of impurity moisture evaporation and crystallization under heating conditions, it can efficiently scrape off the polysaccharides and dust adhering to Polygonatum. It can actively intervene in the early stage of contamination, slow down the rate of decline in the thermal conductivity of the heating tube, reduce the temperature deviation caused by scale buildup on the heating surface, ensure the temperature stability of Polygonatum tea drying process, improve the consistency of finished product quality, and at the same time reduce the frequency of shutdown for cleaning and maintenance costs.

[0018] By adjusting the structure, dynamic compensation of heat exchange capacity is achieved, avoiding forced shutdowns or low-temperature processing. Multiple independent electric heating tubes are flipped and unfolded to both sides using pull rods, which increases the contact area between the heating elements and the circulating air, and also creates airflow turbulence and prolongs the residence time of hot air, effectively compensating for heat conduction loss caused by scaling. The buffer connecting ring ensures the structural stability of the flipping process, so that the equipment can still maintain a qualified drying temperature even when the heating tubes are severely scaled, ensuring the smooth processing of the current batch of Polygonatum tea and avoiding raw material scrapping and production interruption losses. Attached Figure Description

[0019] Figure 1 This is a first-view three-dimensional structural diagram of the electric heating constant temperature forced air drying oven of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the box body of the present invention; Figure 3 This is a cross-sectional view of the housing of the present invention; Figure 4 This is a three-dimensional structural diagram of the mounting bracket and heating chamber of the present invention. Figure 5 This is a three-dimensional structural diagram of the filter compartment frame and fixing ribs of the present invention. Figure 6 This is a schematic diagram of the three-dimensional structure of the corrugated plate and the elastic protrusion of the present invention; Figure 7 This is a cross-sectional view of the rotating sleeve of the present invention; Figure 8 This is a three-dimensional structural diagram of the air guide tube and the annular dust collection groove of the present invention. Figure 9 This is a three-dimensional structural diagram of the electric push rod and guide tube of the present invention. Figure 10 This is a three-dimensional structural diagram of the guide tube and the fixing pin of the present invention. Figure 11 This is an exploded view of the pipe wall descaling component of the present invention; Figure 12 for Figure 11 Enlarged view of A in the middle; Figure 13 This is a three-dimensional structural diagram of the mounting bracket and drive motor of the present invention. Figure 14 This is a split view of the independent electric heating element of the present invention; Figure 15 This is a schematic diagram of the unfolded three-dimensional structure of the independent electric heating tube of the present invention.

[0020] In the diagram: 1. Housing; 2. Door; 3. Material support frame; 4. Mounting frame; 5. Heating chamber; 6. Filter self-cleaning assembly; 61. Filter chamber frame; 62. Rotating sleeve; 63. Air guide duct; 64. Circulating air connection pipe; 65. Corrugated plate; 66. Fixing rib; 67. Central fixing shaft; 68. Corrugated plate; 69. Pin shaft; 610. Stainless steel sintered filter screen; 611. Miniature servo motor; 612. Driven arc-shaped gear ring; 613. Drive wheel; 614. Elastic protrusion; 615. Annular dust collection trough; 7. Pipe wall cleaning assembly. 71. Electric push rod; 72. Transmission telescopic rod; 73. Guide tube; 74. Grooved rotating rod; 75. Rotating sleeve; 76. Fixed pin; 77. Drive gear; 78. Fixed outer ring frame; 79. Fixed plate; 710. Rotating inner ring frame; 711. Driven gear ring; 712. Pipe wall scraper; 8. Heating adjustment assembly; 81. Pull rod; 82. Transmission external thread; 83. Transmission plate; 84. Connecting rod; 85. Drive motor; 86. Buffer connecting ring; 87. Independent electric heating tube; 88. Transmission threaded sleeve; 9. Air outlet. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-15 As shown, the following preferred technical solution is provided: an electric thermostatic drying oven for processing Polygonatum sibiricum tea, comprising a box body 1. The box body 1 provides a stable bearing and operating space for the processing of Polygonatum sibiricum, enabling the various functional components to coordinate and operate in an orderly manner. A door 2 is hinged to the surface of the box body 1. The door 2 works with the box body 1 to maintain a suitable temperature inside the box body 1, facilitating the drying process of Polygonatum sibiricum. A material support rack 3 is inserted into the inner wall of the box body 1. The material support rack 3 is used to place the Polygonatum sibiricum to be processed on the material support rack 3, and then, by inserting it into the inner wall of the box body 1, multiple layers of Polygonatum sibiricum are arranged. At the same time, the layered placement inside the box body 1 ensures that the Polygonatum sibiricum on each layer of the material support rack 3 can be heated evenly. For ease of processing, a mounting bracket 4 is fixedly connected to the bottom inner wall of the box 1. The mounting bracket 4 is set at the bottom of the box 1 and is used to install and fix the heating element so that the heat generated by the heating element can be transported upward in an orderly manner. A heating chamber 5 is fixedly connected to one side surface of the mounting bracket 4. The heating chamber 5 and the mounting bracket 4 cooperate with each other so that the heat generated by the heating element can be gathered in the heating chamber 5. Then, the circulating air will transfer the heat to the processing layer at the top of the box 1 to process the Polygonatum. At the same time, the heating chamber 5 can also intercept heat, reduce heat leakage, and ensure that the energy can be used to process the Polygonatum in the box 1 to the maximum extent, and reduce heat loss. One side surface of the heating chamber 5 is fixedly connected to the inner wall of the box 1. like Figure 3 As shown, a heating regulating component 8 is inserted inside the heating chamber 5. The heating regulating component 8 can provide stable heat transfer for the drying and processing of Polygonatum inside the chamber 1. When too much polysaccharide and dust impurities secreted by Polygonatum during processing adhere to the heating regulating component 8, the thermal conductivity drops significantly, and scraping off the surface impurities is ineffective. The heating regulating component 8 can flip itself, causing multiple heating elements on it to flip to both sides, thereby increasing the contact area with the circulating air. The heating elements flipped to both sides also create a certain degree of turbulence, which increases the residence time of the circulating air passing through the heating chamber 5, thereby carrying more heat air upwards. This reduces the impact of polysaccharide and dust impurities adhering to the surface of the heating elements on the heating regulating component 8 on the thermal conductivity, allowing the equipment to continue operating and avoiding damage to the raw materials from shutdown. like Figure 4 As shown, a pipe wall cleaning component 7 is slidably connected to one end surface of the heating regulating component 8. The pipe wall cleaning component 7 is used to quickly evaporate the moisture of the substances adhering to the surface of the heating element when polysaccharide substances and dust impurities initially adhere to the surface of the heating element on the heating regulating component 8, so that they can crystallize and form a hard solid. Then, the pipe wall cleaning component 7 is rotated and scraped to clean the impurities on the surface of the heating regulating component 8, thereby ensuring the thermal conductivity of the heating regulating component 8 and enabling the heating regulating component 8 to continuously perform the drying operation of Polygonatum odoratum in the best condition. The pipe wall cleaning component 7 is inserted into the mounting bracket 4. like Figures 3-5 As shown, a self-cleaning filter assembly 6 is fixedly connected to the bottom surface of the heating chamber 5. The self-cleaning filter assembly 6 is used to partially intercept dust and polysaccharide substances in the drying chamber. At the same time, it can clean impurities on the surface through its own structure, so as to remove surface impurities and ensure the optimal interception state of the filter. After cleaning its own impurities, it can also collect impurities to prevent impurities from re-entering the chamber 1 and forming secondary pollution, thereby improving the impurity removal capability. An air outlet 9 is fixedly connected to the inner wall of the chamber 1. The air outlet 9 is used to discharge the gas dried in the chamber 1 and re-gather it to the air inlet of the self-cleaning filter assembly 6 to participate in the circulating drying. After the airflow dries the Polygonatum sibiricum, it carries away some dust, impurities, and polysaccharide particles, and is discharged from the outlet 9. The gas discharged from the outlet 9 then converges again at the inlet of the filter self-cleaning assembly 6 to participate in the circulating drying. Therefore, dust, impurities, and polysaccharide particles will adhere to the filter and other components. As the circulating air in the chamber 1 is transported to the heating chamber 5 through the filter self-cleaning assembly 6, the dust, impurities, and polysaccharides carried in the circulating air are partially intercepted by the filter self-cleaning assembly 6. Subsequently, the filter self-cleaning assembly 6 rotates to cause the filter to twist and deform at a certain angle, so that the edges of each hole come into contact and rub against each other, thereby dislodging the impurities on the surface of the filter and reducing the accumulation of impurities on the filter, thus improving the filter's ability to intercept impurities. While reducing the impact on heat conduction and maintaining the smooth flow of heat transfer, the circulating air then enters the heating chamber 5. Impurities will adhere to the heating regulating component 8. At this time, the pipe wall cleaning component 7 starts to operate, scraping off the impurities on the heating regulating component 8, thereby ensuring the thermal conductivity of the heating element. When the impurities on the surface of the heating element are difficult to remove by the pipe wall cleaning component 7, the thermal conductivity begins to decline significantly. The heating regulating component 8 begins to self-remedy by spreading its multiple heating elements to both sides, increasing the contact area with the circulating air, thereby allowing more heat to be conducted and reducing the flow rate of the rapidly passing circulating air, increasing the ventilation cross-section and heat carrying area, thereby reducing the impact of the decline in thermal conductivity.

[0023] like Figures 3-5 As shown, the filter self-cleaning assembly 6 includes a filter frame 61 fixedly connected to the bottom of the heating chamber 5. Multiple rotating sleeves 62 are rotatably connected to the inner wall of the filter frame 61. An air guide duct 63 is rotatably connected to the bottom of the rotating sleeve 62. A circulating air connection pipe 64 is fixedly connected to the bottom of the air guide duct 63. One end of the circulating air connection pipe 64 is fixedly connected to the inner wall of the housing 1. The rotating sleeves 62 can rotate inside the filter frame 61. At the same time, the filter frame 61 can provide a fixed bearing foundation for the operation of subsequent driven components. The air guide duct 63, in conjunction with the circulating air connection pipe 64, continues to transport the circulating air drawn down from the housing 1 into the air guide duct 63 through the circulating air connection pipe 64.

[0024] like Figures 4-7As shown, an annular dust collection groove 615 is elastically connected to the inner wall of the air guide duct 63, and a corrugated plate 65 is fixedly connected to the surface of the filter frame 61. A fixing rib 66 is fixedly connected to the surface of the corrugated plate 65, and a central fixing shaft 67 is fixedly inserted into the axial middle section of the fixing rib 66. When the circulating air is conveyed upward through the air guide duct 63, the axial center of the annular dust collection groove 615 is pushed open by the circulating air, and then the annular dust collection groove 615 begins to flip to the inner wall of the air guide duct 63. When there is no airflow, the edges of the annular dust collection groove 615 re-adhere to each other, forming a closed axial center, making it difficult for impurities to pass through. The fixing rib 66 and the central fixing shaft 67 form a stable support. Through its own structural characteristics, when a component comes into contact with its surface, the component in contact with the corrugated plate 65 will move according to the undulating characteristics of the corrugated plate 65's wave structure.

[0025] like Figures 5-7 As shown, a pin 69 is fixedly connected to the axial middle section surface of the central fixed shaft 67. A stainless steel sintered filter screen 610 is fixedly connected to the surface of the pin 69. The edge of the stainless steel sintered filter screen 610 is fixedly connected to the inner wall of the rotating sleeve 62. Multiple corrugated plates 68 are rotatably connected to the surface of the central fixed shaft 67. The bottom ends of the multiple corrugated plates 68 are fixedly connected to the surface of the central fixed shaft 67, and the top corrugated plates 68 are all fixedly connected to the inner wall of the rotating sleeve 62. The corrugated plates 68 between the bottom and top corrugated plates 68 can be freely unfolded. When the rotating sleeve 62 rotates, the stainless steel sintered filter screen 610 begins to move on the surface of the pin 69. As the rotating sleeve 62 rotates, multiple corrugated plates 68 unfold and form a closed cover, blocking the top opening of the rotating sleeve 62. While the stainless steel sintered filter screen 610 rotates, impurities on the stainless steel sintered filter screen 610 are squeezed and pulled off the stainless steel sintered filter screen 610. At the same time, as the multiple corrugated plates 68 slowly close, some air flows back in, blowing away the impurities on the filter screen and cleaning the surface again. At this time, the annular dust collection groove 615, no longer blown by the circulating air, begins to close, cooperating with the stainless steel sintered filter screen 610 to collect the impurities that fall off the stainless steel sintered filter screen 610.

[0026] like Figures 6-8As shown, a micro servo motor 611 is fixedly connected inside the filter chamber 61. A drive wheel 613 is fixedly connected to the output end of the micro servo motor 611. A driven arc-shaped gear ring 612 is fixedly connected to the surface of the rotating sleeve 62. The driven arc-shaped gear ring 612 meshes with the drive wheel 613. Multiple elastic protrusions 614 are fixedly connected to the side wall of the rotating sleeve 62. The tops of the multiple elastic protrusions 614 are in contact with the surface of the corrugated plate 65. When there are too many impurities on the stainless steel sintered filter screen 610, the micro servo motor 611 on the filter chamber 61 starts, driving the drive wheel 613 to rotate, which in turn drives the driven arc-shaped gear ring 612 on the rotating sleeve 62 to rotate. As the rotating sleeve 62 rotates, the stainless steel sintered filter screen 610 begins to rotate around the pin 69. Multiple corrugated plates 68 are also deployed simultaneously. The elastic protrusions 614 begin to contact the surface of the corrugated plates 65 during rotation, generating intermittent vibrations. This vibration helps to shake off impurities on the surface of the stainless steel sintered filter screen 610. Then, the micro servo motor 611 is controlled to rotate back and forth multiple times, thereby cleaning the impurities on the surface of the stainless steel sintered filter screen 610. Compared with the traditional method of interlacing friction of filter screens, which is essentially only surface cleaning and difficult to clean impurities between the gaps in the filter screen pores, the method implemented in this invention is advantageous because the pores of the stainless steel sintered filter screen 610 also deform and come into contact with friction, thereby cleaning impurities on the surface and between the pores, achieving more comprehensive cleaning. At the same time, the impurities are collected through the annular dust collection tank 615, making it convenient for staff to replace and clean.

[0027] like Figures 4-11 As shown, the pipe wall cleaning assembly 7 includes an electric push rod 71 inserted into the side wall of the mounting bracket 4. A transmission telescopic rod 72 is slidably connected inside the electric push rod 71. A guide tube 73 is fixedly connected to one end surface of the electric push rod 71. A grooved rotating rod 74 is rotatably connected inside the guide tube 73. When the circulating air carries dust impurities and polysaccharide substances into the heating chamber 5, the pipe wall cleaning assembly 7 starts to operate, and the electric push rod 71 starts to drive, causing the transmission telescopic rod 72 to perform axial transport. The transmission telescopic rod 72 is the output end of the electric push rod 71. The principle of the electric push rod 71 driving the transmission telescopic rod 72 to extend is well known to those skilled in the art and does not involve the improvement direction of this application. Therefore, it will not be described in detail. The guide tube 73 is used to provide movement guidance for the grooved rotating rod 74.

[0028] like Figures 9-11As shown, a rotating sleeve 75 is rotatably connected inside the grooved rotating rod 74. The inside of the rotating sleeve 75 is fixedly sleeved with the transmission telescopic rod 72. A fixing pin 76 is inserted into the surface of the guide tube 73. The end of the fixing pin 76 fits into the groove on the surface of the grooved rotating rod 74. A drive gear 77 is fixedly connected to the output end of the grooved rotating rod 74. A fixing plate 79 is rotatably connected to the surface of the output end of the grooved rotating rod 74. When the transmission telescopic rod 72 is conveying, the transmission telescopic rod 72 starts to push the rotating sleeve 75 to drive the grooved rotating rod 74 to slide axially in the guide tube 73. Due to the interference of the fixing pin 76 inserted into the surface of the guide tube 73, the axial movement of the grooved rotating rod 74 in the guide tube 73 is accompanied by rotation. At this time, one end of the grooved rotating rod 74 pushes the fixing plate 79 to move in the same direction, and one end of the grooved rotating rod 74 drives the drive gear 77 to rotate together in the fixing plate 79.

[0029] like Figures 7-12 As shown, a fixed outer ring frame 78 is fixedly connected to one end of the fixed plate 79. A rotating inner ring frame 710 is rotatably connected inside the fixed outer ring frame 78. A driven gear ring 711 is fixedly connected to the surface edge of the rotating inner ring frame 710. Multiple pipe wall scraping blocks 712 are fixedly connected to the inner wall of the rotating inner ring frame 710. The fixed plate 79 is pushed and moved by the grooved rotating rod 74. The fixed plate 79 drives the fixed outer ring frame 78 to move in the same direction. At the same time, the driven gear ring 711, which is meshed with the drive gear 77, drives the rotating inner ring frame 710 to rotate inside the fixed outer ring frame 78. Then, multiple inclined pipe wall scraping blocks 712 move spirally together, thereby cleaning the impurities on the surface of the heating adjustment component 8.

[0030] like Figures 3-13 As shown, the heating adjustment assembly 8 includes multiple pull rods 81 that penetrate the inner wall of the heating chamber 5. Each pull rod 81 has a transmission external thread 82 on its surface. One end of the pull rod 81 is fixedly sleeved with a transmission plate 83. Multiple drive motors 85 are fixedly connected to one side surface of the mounting bracket 4. When impurities on the heating adjustment assembly 8 are difficult to clean and the thermal conductivity decreases significantly, the drive motor 85 starts to drive, causing the transmission plate 83 to pull the multiple pull rods 81 to move. As the pull rods 81 move, the transmission external threads 82 on the surface of the pull rods 81 begin to move synchronously.

[0031] like Figures 13-15As shown, the output ends of multiple drive motors 85 are all fixedly connected to connecting rods 84. One end of the connecting rod 84 is fixedly connected to the transmission plate 83. Multiple transmission threaded sleeves 88 are threadedly connected to the surface of the transmission external thread 82. Independent electric heating tubes 87 are fixedly connected to the surface of the multiple transmission threaded sleeves 88. The transmission threaded sleeves 88 are eccentrically positioned inside the independent electric heating tubes 87. Buffer connecting rings 86 are fixedly connected to the side walls of the independent electric heating tubes 87. When the connecting rod 84 drives the transmission plate 83 to move, the pull rod 81 and the transmission external thread 82 move together. Due to the transmission threaded sleeves 88... The threads rotate in opposite directions, and then multiple transmission threaded sleeves 88 drive the independent electric heating tubes 87 to flip to both sides on the surface of the pull rod 81. The buffer connecting ring 86 keeps the adjacent independent electric heating tubes 87 in contact, and also allows the independent electric heating tubes 87 to have sufficient flipping distance when the pull rod 81 is pulled. At this time, the multiple independent electric heating tubes 87 expose their side walls to the heating chamber 5, thereby improving the thermal conductivity and ensuring that the current batch of Polygonatum tea can be processed smoothly, thus ensuring the normal operation of the processing and reducing the impact of decreased thermal conductivity on the drying process.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric constant temperature forced-air drying oven for processing Polygonatum odoratum tea, comprising a box body (1), characterized in that: The surface of the box (1) is hinged with a door (2), the inner wall of the box (1) is inserted with a material support frame (3), the bottom inner wall of the box (1) is fixedly connected with a mounting frame (4), one side surface of the mounting frame (4) is fixedly connected with a heating chamber (5), one side surface of the heating chamber (5) is fixedly connected with the inner wall of the box (1), the heating chamber (5) is inserted with a heating adjustment component (8), one end surface of the heating adjustment component (8) is slidably connected with a pipe wall cleaning component (7), the pipe wall cleaning component (7) is inserted with the mounting frame (4), the bottom surface of the heating chamber (5) is fixedly connected with a filter screen self-cleaning component (6), and the inner wall of the box (1) is fixedly connected with an air outlet (9).

2. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 1, characterized in that: The filter self-cleaning assembly (6) includes a filter chamber frame (61) fixedly connected to the bottom surface of the heating chamber (5). Multiple rotating sleeves (62) are rotatably connected to the inner wall of the filter chamber frame (61). A guide tube (63) is rotatably connected to the bottom of the rotating sleeve (62). A circulating air connection pipe (64) is fixedly connected to the bottom of the guide tube (63). One end of the circulating air connection pipe (64) is fixedly connected to the inner wall of the box (1).

3. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 2, characterized in that: An annular dust collection groove (615) is elastically connected to the inner wall of the air guide tube (63). A corrugated plate (65) is fixedly connected to the surface of the filter frame (61). A fixing rib (66) is fixedly connected to the surface of the corrugated plate (65). A central fixing shaft (67) is fixedly inserted into the axial middle section of the fixing rib (66).

4. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 3, characterized in that: A pin (69) is fixedly connected to the axial middle section surface of the central fixed shaft (67), and a stainless steel sintered filter screen (610) is fixedly connected to the surface of the pin (69). The edge of the stainless steel sintered filter screen (610) is fixedly connected to the inner wall of the rotating sleeve (62). A plurality of corrugated plates (68) are rotatably connected to the surface of the central fixed shaft (67). The bottom ends of the plurality of corrugated plates (68) are fixedly connected to the surface of the central fixed shaft (67), and the top corrugated plates (68) of the plurality of corrugated plates (68) are all fixedly connected to the inner wall of the rotating sleeve (62). The corrugated plates (68) between the bottom corrugated plates (68) and the top corrugated plates (68) can be freely unfolded.

5. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 4, characterized in that: A micro servo motor (611) is fixedly connected inside the filter compartment (61). A drive wheel (613) is fixedly connected to the output end of the micro servo motor (611). A driven arc-shaped gear ring (612) is fixedly connected to the surface of the rotating sleeve (62). The driven arc-shaped gear ring (612) meshes with the drive wheel (613). A plurality of elastic protrusions (614) are fixedly connected to the side wall of the rotating sleeve (62). The tops of the plurality of elastic protrusions (614) are in contact with the surface of the wave plate (65).

6. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 5, characterized in that: The pipe wall cleaning assembly (7) includes an electric push rod (71) inserted into the side wall of the mounting bracket (4). The electric push rod (71) is slidably connected to a transmission telescopic rod (72). A guide tube (73) is fixedly connected to one end surface of the electric push rod (71). A grooved rotating rod (74) is rotatably connected inside the guide tube (73).

7. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 6, characterized in that: The grooved rotating rod (74) is rotatably connected to a rotating sleeve (75), and the inside of the rotating sleeve (75) is fixedly sleeved with the transmission telescopic rod (72). A fixing pin (76) is inserted into the surface of the guide tube (73), and the end of the fixing pin (76) is in contact with the groove on the surface of the grooved rotating rod (74). A drive gear (77) is fixedly connected to the output end of the grooved rotating rod (74), and a fixing plate (79) is rotatably connected to the surface of the output end of the grooved rotating rod (74).

8. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 7, characterized in that: One end of the fixed plate (79) is fixedly connected to a fixed outer ring frame (78), and a rotating inner ring frame (710) is rotatably connected inside the fixed outer ring frame (78). A driven gear ring (711) is fixedly connected to the surface edge of the rotating inner ring frame (710), and a plurality of pipe wall scraping blocks (712) are fixedly connected to the inner wall of the rotating inner ring frame (710).

9. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 8, characterized in that: The heating adjustment assembly (8) includes multiple pull rods (81) that penetrate the inner wall of the heating chamber (5). The surfaces of the multiple pull rods (81) are provided with external transmission threads (82). One end of the pull rod (81) is fixedly sleeved with a transmission plate (83). Multiple drive motors (85) are fixedly connected to one side surface of the mounting bracket (4).

10. The electrically heated constant-temperature forced-air drying oven for processing Polygonatum tea according to claim 9, characterized in that: Each of the output ends of the drive motors (85) is fixedly connected to a connecting rod (84). One end of the connecting rod (84) is fixedly connected to the transmission plate (83). The surface of the external transmission thread (82) is threaded with multiple transmission thread sleeves (88). The surface of the multiple transmission thread sleeves (88) is fixedly connected with an independent electric heating tube (87). The transmission thread sleeve (88) is eccentrically located inside the independent electric heating tube (87). A buffer connecting ring (86) is fixedly connected to the side wall of the independent electric heating tube (87).

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