Tea microwave drying device

Abstract

The invention discloses a tea leaf microwave drying device which comprises a conveying belt, a drying box body is arranged on the upper end face of the conveying belt, a microwave generator is arranged on the upper end face of the drying box body, and a tea leaf smoothing assembly is arranged on the inner side of the drying box body. According to the device, conveyed and dried tea leaves can be scraped to be uniform in thickness, uniform microwave energy absorption is directly achieved due to the uniform thickness, and the problem that the tea leaves are scorched outside and internally generated or are too dry and crushed is solved; meanwhile, the peak value of the tea leaves overflowing from the second overflow port in the smoothing baffle plate can be temporarily stored, so that the problem that the second overflow port is blocked is avoided; meanwhile, the stroke of the smoothing push plate is utilized to drive the vibration ejector rod to knock the inclined plate, high-frequency micro vibration is generated, the tea leaves are kept in a flowing state, and the hidden danger of tea clamping is eliminated; the whole smoothing process is light pushing-overflowing-sliding, rigid extrusion is avoided, the integrity rate of the tea leaves is high, and the tea breaking rate is reduced by 30% or above.

Description

Technical Field

[0001] This invention relates to the field of tea drying technology, and in particular to a microwave drying device for tea. Background Technology

[0002] In tea processing, drying is a crucial step that determines flavor. Existing traditional drying methods, such as box-type hot air drying and drum drying, have been used for many years. Box-type hot air drying (BFD) is a typical "thermal convection" mode: hot air is used as the medium, and heat is transferred to the tea leaves through airflow, causing moisture to evaporate from the surface. This method is low-cost and simple to operate. In the initial stage of drying, free water evaporates first, while in the later stages, more energy is needed to overcome intermolecular forces to evaporate bound water, resulting in a slower and gentler dehydration rate. Drum drying (RFD), on the other hand, relies on "thermal conduction": the tea leaves come into direct contact with the high-temperature (135–280℃) metal drum surface, rapidly absorbing heat through solid-state conduction. This intense heating not only accelerates dehydration but also promotes cell breakage due to friction between the tea leaves and the metal surface, making internal substances more readily involved in thermal reactions. Microwave drying, a type of "thermal radiation," involves electromagnetic waves penetrating the tea leaves, causing the internal water molecules to vibrate and generate heat through friction, achieving drying "from the inside out." It is extremely efficient, reducing the moisture content to the target level in just 4 minutes (110℃). Furthermore, it provides more uniform heating, reducing quality deterioration caused by localized overheating. Therefore, microwave drying of tea combines the advantages of box-type hot air drying and drum drying, making it widely used.

[0003] Currently, microwave drying devices for tea typically use conveyor belts to transport tea to the target drying area. However, when tea is placed on the conveyor belt for transport, it naturally piles up in a "ridge" shape, resulting in uneven thickness and large differences in microwave energy absorption. This leads to problems such as localized over-drying and scorching, and localized areas still having excessive moisture content. Summary of the Invention

[0004] The purpose of this application is to provide a microwave drying device for tea leaves, which solves the problems mentioned in the background art.

[0005] In a first aspect, the microwave drying device for tea provided in this application adopts the following technical solution: it includes a conveyor belt, a drying chamber is provided on the upper end face of the conveyor belt, a microwave generator is provided on the upper end face of the drying chamber, a tea smoothing component is provided inside the drying chamber, the tea smoothing component includes a tea smoothing part, an overflow conveying component and an auxiliary vibration component, the tea smoothing part is provided on one side of the feed inlet of the drying chamber, and the overflow conveying component and the auxiliary vibration component are provided on the tea smoothing part.

[0006] Preferably, the tea smoothing component includes a smoothing baffle, a guide block, a groove, a first rotating wheel, a second rotating wheel, a toothed belt, a bidirectional screw, a guide rod, a moving plate, a smoothing push plate, a first overflow port, and a second overflow port. The smoothing baffle is disposed inside the drying chamber, and a tea conveying gap is reserved between the lower end face of the smoothing baffle and the upper end face of the conveyor belt.

[0007] Preferably, two guide blocks are provided, and the two guide blocks are provided on both sides of the side wall opposite to the feed inlet of the drying chamber of the smoothing baffle. The slot is opened on the side wall opposite to the inner wall of the drying chamber of the guide block. The first wheel and the second wheel are rotatably connected to the inner wall of the slot on the guide block. The second wheel inside the slot is located above the first wheel, and the first wheel located below abuts against the upper end face of the conveyor belt.

[0008] Preferably, both the first and second rotating wheels have grooves, and the inner side of the grooves has toothed grooves. The toothed belt is located inside the groove on the guide block, and the toothed belt is sleeved in the groove on the first and second rotating wheels inside the groove, and the toothed belt meshes with the toothed groove on the inner side of the groove.

[0009] Preferably, the bidirectional screw is located between two guide blocks, and both ends of the bidirectional screw are connected to the second rotating wheels on the two guide blocks. The guide rod is located above the bidirectional screw, and both ends of the guide rod are connected to the two guide blocks. The movable plate is threaded onto the bidirectional screw, and the guide rod passes through the movable plate.

[0010] Preferably, the smoothing push plate is disposed on the lower end face of the movable plate, the first overflow port is opened on the smoothing push plate, and chamfers are provided at the two corners of the inner bottom end of the first overflow port on the smoothing push plate, and the second overflow port is opened on the smoothing baffle.

[0011] The above technical solution involves a smoothing baffle that first scrapes the tea leaves to a uniform thickness. When local accumulation occurs, the smoothing pusher plate pushes the leaves back and forth to level them. Excess tea leaves overflow in stages through the first and second overflow ports, and then undergo secondary rectification through the "gate-like" gap between the inclined plate and the storage shell. This results in a uniform single-layer material layer on the conveyor belt, ensuring consistent microwave energy absorption and preventing "overcooked outside and undercooked inside" or "overly dry and broken pieces." The moisture content of the entire batch of tea leaves varies by ≤±0.5%, significantly improving the color, aroma, and rehydration properties of the finished product. Utilizing the power of the conveyor belt itself, the linear velocity is converted into the reciprocating frequency of the smoothing pusher plate in real time through the pure mechanical transmission of the first wheel, toothed belt, second wheel, and bidirectional screw. When the instantaneous flow rate of tea leaves is high, the pusher plate moves faster and overflows more; when the flow rate is low, the movement slows down. The entire process requires no sensors or additional motors, achieving adaptive material spreading based on the amount of material received, reducing manual intervention and downtime for cleaning.

[0012] Secondly, the microwave drying device for tea provided in this application adopts the following technical solution: the overflow conveying component includes an inclined plate disposed on a smoothing baffle, the inclined plate being located below the second overflow port, overflow baffles being disposed at both ends of the inclined plate, a storage shell being disposed above the inclined plate, one end of the storage shell being connected to the smoothing baffle, and the other end of the storage shell extending between the two overflow baffles and leaving a gap between it and the upper end surface of the inclined plate.

[0013] The above technical solution, through the setting of the overflow conveying component, can spread the tea leaves flowing out of the second overflow port onto the tea leaves on the conveyor belt with a uniform thickness. This can ensure that the tea leaves on the conveyor belt always maintain a uniform thickness. The temporary storage space formed between the inclined plate and the storage shell can temporarily store the surplus during the instantaneous peak of material arrival, avoiding channel blockage.

[0014] Thirdly, the microwave drying device for tea provided in this application adopts the following technical solution: the auxiliary vibration component includes a receiving groove opened in the smoothing baffle, the receiving groove is located below the second overflow port, the smoothing baffle is provided with a vibration top rod, the two ends of the vibration top rod are dome-shaped, the dome of one end of the vibration top rod passes through the smoothing baffle, and the dome of the other end of the vibration top rod extends to the bottom of the inclined plate.

[0015] The vibrating top rod is equipped with a polygonal slider, which is located in the receiving groove through which the vibrating top rod passes. The shape and size of the receiving groove are adapted to the polygonal slider. A return spring is provided inside the receiving groove, and one end of the return spring is connected to the polygonal slider inside the receiving groove where the return spring is located.

[0016] The above technical solution uses the smoothing push plate's own stroke to drive the vibrating top rod to strike the inclined plate, generating high-frequency micro-vibration, keeping the tea leaves in a flowing state and eliminating the risk of "tea getting stuck"; the entire smoothing process is a gentle push-over-slide, without rigid compression, resulting in a high tea leaf integrity rate and a reduction in broken tea rate of more than 30%.

[0017] Preferably, a curtain is provided at the feed inlet of the drying chamber, a protective plate is provided at the discharge outlet of the drying chamber, a temperature sensor is provided inside the drying chamber, and a control display is provided on the drying chamber. The temperature sensor is electrically connected to the control display.

[0018] In summary, this application includes the following beneficial technical effects: 1. The smoothing baffle first scrapes the tea leaves into a uniform thickness. When some areas pile up, the smoothing pusher moves back and forth to flatten them. Excess tea leaves overflow in stages through the first and second overflow ports, and then undergo secondary rectification through the "gate-like" gap between the inclined plate and the storage shell. Finally, the tea leaves form a uniform single layer on the conveyor belt in both the horizontal and vertical directions. The uniform thickness directly leads to consistent microwave energy absorption, avoiding "outer burnt and inner raw" or "over-dry and broken". The moisture content difference of the entire batch of tea leaves is ≤±0.5%, which significantly improves the color, aroma and rehydration of the finished product. Utilizing the power of the conveyor belt itself, the linear speed is converted into the reciprocating frequency of the smoothing pusher in real time through the pure mechanical transmission of the first wheel, toothed belt, second wheel and bidirectional screw. When the instantaneous flow of tea leaves is large, the pusher moves faster and the overflow increases. When the flow is small, the movement slows down. No sensors or additional motors are required throughout the process, achieving adaptive material spreading of "spreading only what comes in", reducing manual intervention and downtime for cleaning. 2. By setting up the overflow conveyor component, the tea leaves flowing out of the second overflow port can be spread on the tea leaves on the conveyor belt with a uniform thickness. This can ensure that the tea leaves on the conveyor belt always maintain a uniform thickness. The temporary storage space formed between the inclined plate and the storage shell can temporarily store the surplus during the instantaneous peak of material arrival and avoid channel blockage. 3. The auxiliary vibration component uses the stroke of the smoothing push plate to drive the vibrating top rod to strike the inclined plate, generating high-frequency micro-vibration, which keeps the tea leaves in a flowing state and eliminates the risk of "tea getting stuck"; the entire smoothing process is a gentle push-over-slide, without rigid compression, resulting in a high tea leaf integrity rate and a reduction of more than 30% in the broken tea rate. Attached Figure Description

[0019] Figure 1 This is a first-view schematic diagram of the overall structure of an embodiment of this application.

[0020] Figure 2 This is a second-view schematic diagram of the overall structure of an embodiment of this application; Figure 3 This is a first-view perspective perspective of a tea-smoothing component according to an embodiment of this application; Figure 4 This is a second perspective view of the tea smoothing component according to an embodiment of this application; Figure 5 This is a cross-sectional view of the tea smoothing component according to an embodiment of this application; Figure 6 Examples of embodiments of this application Figure 5 Enlarged view of point A in the middle; Figure 7 This is a split view of the protective plate and drying chamber according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1. Conveyor belt; 2. Drying chamber; 3. Microwave generator; 4. Tea smoothing assembly; 41. Tea smoothing component; 411. Smoothing baffle; 412. Guide block; 413. Groove; 414. First roller; 415. Second roller; 416. Toothed belt; 417. Bidirectional screw; 418. Guide rod; 419. Moving plate; 4110. Smoothing push plate; 4111. First overflow port; 4112. Second overflow port; 42. Overflow conveying assembly; 421. Inclined plate; 422. Overflow baffle; 423. Storage shell; 43. Auxiliary vibration assembly; 431. Receiving trough; 432. Vibration top rod; 433. Polygonal slider; 434. Return spring; 5. Curtain; 6. Protective plate; 7. Control display. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0023] Example 1: A microwave drying device for tea includes a conveyor belt 1, a drying chamber 2 is provided on the upper end face of the conveyor belt 1, a microwave generator 3 is provided on the upper end face of the drying chamber 2, and a tea smoothing component 4 is provided inside the drying chamber 2. The tea smoothing component 4 includes a tea smoothing part 41, an overflow conveying component 42, and an auxiliary vibration component 43. The tea smoothing part 41 is provided on one side of the feed inlet of the drying chamber 2, and the overflow conveying component 42 and the auxiliary vibration component 43 are provided on the tea smoothing part 41.

[0024] The tea smoothing component 41 includes a smoothing baffle 411, a guide block 412, a groove 413, a first rotating wheel 414, a second rotating wheel 415, a toothed belt 416, a bidirectional screw 417, a guide rod 418, a moving plate 419, a smoothing push plate 4110, a first overflow port 4111, and a second overflow port 4112. The smoothing baffle 411 is disposed inside the drying chamber 2, and a tea conveying gap is reserved between the lower end face of the smoothing baffle 411 and the upper end face of the conveyor belt 1.

[0025] It should be noted that the tea conveying gap reserved between the lower end face of the smoothing baffle 411 and the upper end face of the conveyor belt 1 facilitates the tea conveyed by the upper end face of the conveyor belt 1 to pass under the smoothing baffle 411. The drying box 2 is provided with an inlet and an outlet at both ends.

[0026] Two guide blocks 412 are provided, and the two guide blocks 412 are provided on both sides of the side wall opposite to the feed inlet of the drying box 2 of the smoothing baffle 411. The slot 413 is opened on the side wall opposite to the inner wall of the drying box 2 of the guide block 412. The first rotating wheel 414 and the second rotating wheel 415 are rotatably connected to the inner wall of the slot 413 on the guide block 412. The second rotating wheel 415 inside the slot 413 is located above the first rotating wheel 414, and the first rotating wheel 414 located below it abuts against the upper end face of the conveyor belt 1.

[0027] The guide block 412 has a right-angled triangle cross-section and is used to guide and transport the tea leaves conveyed on the conveyor belt 1.

[0028] Both the first rotating wheel 414 and the second rotating wheel 415 have grooves, and the inner side of the grooves has toothed grooves. The toothed belt 416 is located inside the slot 413 on the guide block 412, and the toothed belt 416 is sleeved in the grooves on the first rotating wheel 414 and the second rotating wheel 415 inside the slot 413. The toothed belt 416 meshes with the toothed grooves inside the grooves.

[0029] The bidirectional screw 417 is located between two guide blocks 412. Both ends of the bidirectional screw 417 are connected to the second rotating wheels 415 on the two guide blocks 412. The guide rod 418 is located above the bidirectional screw 417. Both ends of the guide rod 418 are connected to the two guide blocks 412. The moving plate 419 is threaded onto the bidirectional screw 417, and the guide rod 418 passes through the moving plate 419.

[0030] The smoothing push plate 4110 is disposed on the lower end face of the movable plate 419. The first overflow port 4111 is opened on the smoothing push plate 4110. Chamfers are opened at the two corners of the inner bottom end of the first overflow port 4111 on the smoothing push plate 4110. The second overflow port 4112 is opened on the smoothing baffle 411.

[0031] The second overflow port 4112 is an inclined port, which can prevent tea residue from passing through the second overflow port 4112.

[0032] It should be noted that the chamfer on the inner side of the first overflow port 4111 can prevent tea leaves passing through the first overflow port 4111 from accumulating at the first overflow port 4111. The end point of the travel of the smoothing push plate 4110 when it moves back and forth is a certain distance away from the two guide blocks 412 on the smoothing baffle 411.

[0033] In this embodiment, the tea leaves to be dried are first placed on the conveyor belt 1. The conveyor belt 1 transports the tea leaves from the feed inlet of the drying chamber 2 to the inside of the drying chamber 2. When the tea leaves are transported to the inside of the drying chamber 2, the microwave generator 3 is activated. The tea leaves transported to the inside of the drying chamber 2 will pass through the smoothing baffle 411, which will smooth the tea leaves. Excess tea leaves will remain on one side of the smoothing baffle 411. During the process of transporting the tea leaves, the conveyor belt 1 drives the first rotating wheel 414, which is in contact with the upper surface of the conveyor belt 1, to rotate. The first rotating wheel 414 drives the second rotating wheel 415, which is located in the same groove 413 as the first rotating wheel 414, to rotate through the toothed belt 416. The second rotating wheel 415 drives the bidirectional screw 417 to rotate. The moving plate 419 drives the smoothing push plate 4110 to move back and forth along the guide rod 418. The movement of the smoothing push plate 4110 will flatten the tea leaves stuck on one side of the smoothing baffle 411. When the height of the tea leaves smoothed by the smoothing push plate 4110 reaches the first overflow port 4111 on the smoothing push plate 4110, the first overflow port 4111 will overflow the tea leaves accumulated on one side of the smoothing push plate 4110 in the opposite direction of the smoothing push plate 4110's travel direction. When the height of the tea leaves accumulated on one side of the smoothing baffle 411 reaches the second overflow port 4112, the tea leaves on one side of the smoothing baffle 411 fall onto the conveyor belt 1 after passing the tea leaves on the smoothing baffle 411 through the second overflow port 4112. At this time, the tea leaves are evenly spread on the tea leaves on the conveyor belt 1.

[0034] The smoothing baffle 411 first scrapes the tea leaves to a uniform thickness; when some areas pile up, the smoothing pusher 4110 pushes them back and forth to level them. Excess tea leaves overflow in stages through the first overflow port 4111 and the second overflow port 4112, and then undergo secondary rectification through the "gate-like" gap between the inclined plate 421 and the storage shell 423. Finally, the tea leaves form a uniform single layer on the conveyor belt 1 in both the horizontal and vertical directions. The uniform thickness directly results in consistent microwave energy absorption, avoiding "outer burnt and inner raw" or "overly dry and broken" tea leaves. The moisture content difference of the entire batch of tea leaves is ≤ ± With a concentration of 0.5%, it significantly improves the color, aroma, and rehydration properties of the finished product. Utilizing the power of the conveyor belt 1 itself, the linear speed is converted into the reciprocating frequency of the smoothing pusher plate 4110 in real time through pure mechanical transmission via the first rotating wheel 414, toothed belt 416, second rotating wheel 415, and bidirectional screw 417. When the instantaneous flow of tea is large, the pusher plate moves faster and the overflow increases, while the movement slows down when the flow is small. No sensors or additional motors are required throughout the process, achieving adaptive material spreading of "spreading as much as comes in," reducing manual intervention and downtime for cleaning.

[0035] Example 2: A microwave drying device for tea leaves, wherein the overflow conveying assembly 42 includes an inclined plate 421 disposed on a smoothing baffle 411. The inclined plate 421 is located below the second overflow port 4112. Overflow baffles 422 are disposed at both ends of the inclined plate 421. A storage shell 423 is disposed above the inclined plate 421. One end of the storage shell 423 is connected to the smoothing baffle 411, and the other end of the storage shell 423 extends between the two overflow baffles 422 and leaves a gap between it and the upper end face of the inclined plate 421.

[0036] It should be noted that a temporary storage space can be formed between the inclined plate 421 and the storage shell 423.

[0037] In this embodiment, the tea leaves overflowing from the second overflow port 4112 will fall onto the inclined plate 421. The inclined plate 421 slides onto the conveyor belt 1 via its inclined surface. When the tea leaves on the inclined plate 421 are about to slide out, they will pass through the gap between the storage shell 423 and the inclined plate 421, thereby ensuring that the thickness of the tea leaves falling from the inclined plate 421 onto the conveyor belt 1 is uniform. When there are a lot of tea leaves overflowing from the second overflow port 4112, the tea leaves overflowing from the second overflow port 4112 will fall into the temporary storage space formed between the inclined plate 421 and the storage shell 423.

[0038] By setting the overflow conveying component 42, the tea leaves flowing out of the second overflow port 4112 can be laid on the tea leaves on the conveyor belt 1 with a uniform thickness. This ensures that the tea leaves on the conveyor belt 1 always maintain a uniform thickness. The temporary storage space formed between the inclined plate 421 and the storage shell 423 can temporarily store the surplus during the instantaneous peak of material arrival, avoiding channel blockage.

[0039] Example 3: A microwave drying device for tea leaves, wherein the auxiliary vibration component 43 includes a receiving groove 431 formed in a smoothing baffle 411, the receiving groove 431 being located below a second overflow port 4112, a vibration top rod 432 being provided on the smoothing baffle 411, the two ends of the vibration top rod 432 being dome-shaped, the dome at one end of the vibration top rod 432 passing through the smoothing baffle 411, and the dome at the other end of the vibration top rod 432 extending to below an inclined plate 421.

[0040] A polygonal slider 433 is provided on the vibrating top rod 432. The polygonal slider 433 on the vibrating top rod 432 is located in the receiving groove 431 through which the vibrating top rod 432 passes. The shape and size of the receiving groove 431 are adapted to the polygonal slider 433. A return spring 434 is provided inside the receiving groove 431. One end of the return spring 434 is connected to the polygonal slider 433 inside the receiving groove 431 where the return spring 434 is located.

[0041] It should be noted that the side wall of the smoothing push plate 4110 opposite to the smoothing baffle 411 is attached to the smoothing baffle 411.

[0042] In this embodiment, when the smoothing push plate 4110 moves back and forth, the side wall of the smoothing push plate 4110 opposite to the smoothing baffle 411 will abut against the dome of one end of the vibrating push rod 432 that passes through the smoothing baffle 411. At this time, one end of the vibrating push rod 432 is forced to move in the opposite direction to the smoothing push plate 4110. During the movement, the smoothing push plate 4110 squeezes the return spring 434 in the inner receiving groove 431 of the smoothing baffle 411 through which the vibrating push rod 432 passes. The other end of the vibrating push rod 432 strikes the lower end face of the inclined plate 421. The inclined plate 421 vibrates under the force, so that the tea leaves on the inclined plate 421 continue to pass through the gap between the inclined plate 421 and one end of the storage shell 423 under the vibration environment, avoiding the tea leaves from blocking the gap between the inclined plate 421 and one end of the storage shell 423.

[0043] The auxiliary vibration component 43 uses the stroke of the smoothing push plate 4110 to drive the vibration top rod 432 to strike the inclined plate 421, generating high-frequency micro-vibration, keeping the tea leaves in a flowing state and eliminating the risk of "tea getting stuck"; the entire smoothing process is a gentle push-over-slide, without rigid compression, resulting in a high tea leaf integrity rate and a reduction of more than 30% in the broken tea rate.

[0044] A curtain 5 is provided at the inlet of the drying chamber 2, a protective plate 6 is provided at the outlet of the drying chamber 2, a temperature sensor is provided inside the drying chamber 2, and a control display 7 is provided on the drying chamber 2. The temperature sensor is electrically connected to the control display 7.

[0045] The temperature sensor is used to monitor the temperature inside the drying chamber 2. The control display 7 is used to control the operation of the device and can directly observe the temperature value inside the drying chamber 2. The setting of the curtain 5 and the protective plate 6 can reduce the rate of heat loss during the drying of tea inside the drying chamber 2, thereby effectively improving the drying efficiency of tea and reducing the energy consumption of the device.

[0046] Working principle of this invention: First, the tea leaves to be dried are placed on conveyor belt 1. Conveyor belt 1 transports the tea leaves from the feed inlet of drying chamber 2 to the inside of drying chamber 2. When the tea leaves are transported to the inside of drying chamber 2, microwave generator 3 is activated. The tea leaves transported to the inside of drying chamber 2 will pass through smoothing baffle 411, which will smooth the tea leaves, and excess tea leaves will remain on one side of smoothing baffle 411. During the process of transporting the tea leaves, conveyor belt 1 drives the first rotating wheel 414, which is in contact with the upper end face of conveyor belt 1, to rotate. The first rotating wheel 414 drives the second rotating wheel 415, which is located in the same groove 413 as the first rotating wheel 414, to rotate through toothed belt 416. The second rotating wheel 415 drives the bidirectional screw 417 to rotate. The bidirectional screw 417 drives the smoothing pusher 4110 to move back and forth along the guide rod 418 via the moving plate 419. The movement of the smoothing pusher 4110 flattens the tea leaves stuck on one side of the smoothing baffle 411. When the height of the tea leaves flattened by the smoothing pusher 4110 reaches the first overflow port 4111 on the smoothing pusher 4110, the first overflow port 4111 will overflow the tea leaves accumulated on one side of the smoothing pusher 4110 in the opposite direction of the smoothing pusher 4110's travel direction. When the height of the tea leaves accumulated on one side of the smoothing baffle 411 reaches the second overflow port 4112, the tea leaves on the side of the smoothing baffle 411 fall onto the conveyor belt 1 after passing the tea leaves on the smoothing baffle 411 through the second overflow port 4112. At this time, the tea leaves are evenly spread on the tea leaves on the conveyor belt 1; the tea leaves overflowing from the second overflow port 4112 will fall onto the inclined plate 421, which slides onto the conveyor belt 1 through its inclined surface. The tea leaves on the inclined plate 421 will pass through the gap between the storage shell 423 and the inclined plate 421 just before sliding out, thus ensuring that the thickness of the tea leaves falling from the inclined plate 421 onto the conveyor belt 1 is uniform. When a large amount of tea leaves overflow from the second overflow port 4112, the overflowing tea leaves will fall into the temporary storage space formed between the inclined plate 421 and the storage shell 423; when the smoothing push plate 4110 moves back and forth, the smoothing push plate 4110 and the smoothing baffle 411 are opposite each other. One side of the wall will abut against the dome of one end of the vibrating rod 432 that passes through the smoothing baffle 411. At this time, one end of the vibrating rod 432 will be forced to move in the opposite direction to the smoothing push plate 4110. During the movement, the smoothing push plate 4110 will squeeze the return spring 434 in the inner receiving groove 431 of the smoothing baffle 411 through which the vibrating rod 432 passes. The other end of the vibrating rod 432 will strike the lower end face of the inclined plate 421. The inclined plate 421 will vibrate under the force, so that the tea leaves on the inclined plate 421 will continue to pass through the gap between the inclined plate 421 and one end of the storage shell 423 under the vibration environment, thus preventing the tea leaves from blocking the gap between the inclined plate 421 and one end of the storage shell 423.

[0047] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microwave drying device for tea, comprising a conveyor belt (1), characterized in that: The upper end face of the conveyor belt (1) is provided with a drying chamber (2), the upper end face of the drying chamber (2) is provided with a microwave generator (3), the inner side of the drying chamber (2) is provided with a tea smoothing component (4), the tea smoothing component (4) includes a tea smoothing part (41), an overflow conveying component (42) and an auxiliary vibration component (43), the tea smoothing part (41) is provided on one side of the feed inlet of the drying chamber (2), and the overflow conveying component (42) and the auxiliary vibration component (43) are provided on the tea smoothing part (41).

2. The microwave drying device for tea according to claim 1, characterized in that: The tea smoothing component (41) includes a smoothing baffle (411), a guide block (412), a slot (413), a first rotating wheel (414), a second rotating wheel (415), a toothed belt (416), a bidirectional screw (417), a guide rod (418), a moving plate (419), a smoothing push plate (4110), a first overflow port (4111), and a second overflow port (4112). The smoothing baffle (411) is located inside the drying chamber (2), and a tea conveying gap is reserved between the lower end face of the smoothing baffle (411) and the upper end face of the conveyor belt (1).

3. The microwave drying device for tea according to claim 2, characterized in that: Two guide blocks (412) are provided. The two guide blocks (412) are provided on both sides of the side wall opposite to the feed inlet of the drying box (2) of the smoothing baffle (411). The slot (413) is opened on the side wall opposite to the inner wall of the guide block (412) and the inner wall of the drying box (2). The first wheel (414) and the second wheel (415) are rotatably connected to the inner wall of the slot (413) on the guide block (412). The second wheel (415) inside the slot (413) is located above the first wheel (414). The first wheel (414) located below abuts against the upper end face of the conveyor belt (1).

4. The microwave drying device for tea according to claim 2, characterized in that: Both the first rotating wheel (414) and the second rotating wheel (415) have grooves, and the inner side of the grooves has toothed grooves. The toothed belt (416) is located inside the slot (413) on the guide block (412), and the toothed belt (416) is sleeved in the grooves on the first rotating wheel (414) and the second rotating wheel (415) inside the slot (413). The toothed belt (416) meshes with the toothed groove inside the groove.

5. A microwave drying device for tea according to claim 2, characterized in that: The bidirectional screw (417) is located between two guide blocks (412). The two ends of the bidirectional screw (417) are connected to the second rotating wheel (415) on the two guide blocks (412). The guide rod (418) is located above the bidirectional screw (417). The two ends of the guide rod (418) are connected to the two guide blocks (412). The moving plate (419) is threaded onto the bidirectional screw (417). The guide rod (418) passes through the moving plate (419).

6. The microwave drying device for tea according to claim 2, characterized in that: The smoothing push plate (4110) is disposed on the lower end face of the movable plate (419). The first overflow port (4111) is opened on the smoothing push plate (4110). The two corners of the bottom inner side of the first overflow port (4111) on the smoothing push plate (4110) are chamfered. The second overflow port (4112) is opened on the smoothing baffle (411).

7. The microwave drying device for tea according to claim 2, characterized in that: The overflow conveying assembly (42) includes an inclined plate (421) disposed on a smoothing baffle (411). The inclined plate (421) is located below the second overflow port (4112). Overflow baffles (422) are disposed at both ends of the inclined plate (421). A storage shell (423) is disposed above the inclined plate (421). One end of the storage shell (423) is connected to the smoothing baffle (411), and the other end of the storage shell (423) extends between the two overflow baffles (422) and leaves a gap between it and the upper end face of the inclined plate (421).

8. The microwave drying apparatus for tea according to claim 7, characterized in that: The auxiliary vibration assembly (43) includes a receiving groove (431) opened in the smoothing baffle (411), the receiving groove (431) being located below the second overflow port (4112), and a vibration top rod (432) being provided on the smoothing baffle (411). The two ends of the vibration top rod (432) are dome-shaped, with the dome at one end of the vibration top rod (432) passing through the smoothing baffle (411), and the dome at the other end of the vibration top rod (432) extending to the underside of the inclined plate (421).

9. A microwave drying device for tea according to claim 8, characterized in that: A polygonal slider (433) is provided on the vibrating top rod (432). The polygonal slider (433) on the vibrating top rod (432) is located in the receiving groove (431) through which the vibrating top rod (432) passes. The shape and size of the receiving groove (431) are adapted to the polygonal slider (433). A return spring (434) is provided inside the receiving groove (431). One end of the return spring (434) is connected to the polygonal slider (433) inside the receiving groove (431) where the return spring (434) is located.

10. A microwave drying device for tea according to claim 1, characterized in that: A curtain (5) is provided at the feed inlet of the drying chamber (2), a protective plate (6) is provided at the discharge outlet of the drying chamber (2), a temperature sensor is provided inside the drying chamber (2), and a control display (7) is provided on the drying chamber (2). The temperature sensor is electrically connected to the control display (7).

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