A drying device for pre-packaged vegetables

Abstract

This invention relates to the field of vegetable processing equipment technology, specifically a drying device for pre-packaged vegetables. The device includes a drying chamber with a heating unit fixedly installed on its outer surface. The heating unit heats the air supplied into the chamber. Multiple shelves are installed inside the drying chamber. A limiting plate is fixedly installed at the inner end of the drying chamber, and a support shell is fixedly installed at the bottom end of the limiting plate. Two ventilation pipes pass through the inside of the support shell, and a ventilation device is provided between the support shell and the ventilation pipes. The rotation of the drum drives the traction belt, which in turn rotates the lower pressure plate. After being rotated under force, the guide plate can adjust the direction of the passing hot airflow, guiding the hot airflow towards the inside of the support shell and further through the limiting plate. This enhances the hot air effect on the vegetables in the central area of ​​the limiting plate, improves the drying effect in that area, solves the problem of slow drying in the central and leeward areas, and further improves drying efficiency and heat energy utilization.

Description

Technical Field

[0001] This invention relates to the field of vegetable processing equipment technology, specifically to a drying device for pre-packaged vegetable food. Background Technology

[0002] Vegetables have a high water content after harvesting, and if not processed in time, they are prone to spoilage, affecting their storage and transportation. To extend the shelf life of vegetables and increase their added value, drying is often used to remove the water from vegetables and produce dehydrated vegetable products. Drying not only helps to inhibit the growth of microorganisms and enzyme activity, but also retains the original nutrients and flavor of vegetables to a large extent. Vegetable drying equipment, as a key piece of equipment to realize this process, is widely used in the fields of primary processing of agricultural products and deep processing of food.

[0003] However, in existing vegetable drying devices, the distribution of hot airflow within the cavity is uneven, making it difficult to effectively act on the central and leeward areas of the rack. This results in a significant lag in the drying speed of vegetables in these areas, which in turn affects the overall drying effect and heat utilization efficiency. On the other hand, vegetables are usually laid flat on the rack in a static manner, making it difficult for hot air to fully penetrate the vegetable layer, leading to moisture accumulation and incomplete drying, which affects the uniformity of drying and the stability of product quality. Therefore, this application proposes a vegetable pre-packaged food drying device. Summary of the Invention

[0004] The purpose of this invention is to provide a drying apparatus for pre-packaged vegetables to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drying device for pre-packaged vegetables, comprising a drying chamber, wherein a heating unit is fixedly installed on the outer surface of the drying chamber to heat the air supplied into the chamber, multiple shelves are provided inside the drying chamber, a limiting plate is fixedly installed at the inner end of the drying chamber, the shelves are placed inside the drying chamber and rest on the upper end of the limiting plate, a supporting shell is fixedly installed at the bottom end of the limiting plate, two ventilation pipes are provided inside the supporting shell, a grid is fixedly installed at the center of the supporting shell, hot airflow from the drying chamber enters the supporting shell through the grid, and a ventilation device is provided between the supporting shell and the ventilation pipes to dry the area in the center of the shelves that is not easily affected by the hot airflow, thereby achieving more uniform drying of the vegetables.

[0006] As a further embodiment of the present invention, the outer surface of the limiting plate is provided with a plurality of holes, and each hole is provided with an air outlet block;

[0007] The ventilation device includes a central rod rotatably mounted inside a conductive tube. A drum is fixedly mounted on the outer surface of the central rod, and a traction belt is fixedly wound around the outer surface of the drum. A support cylinder is fixedly mounted on the outer surface of the central rod, and a turbine fan is fixedly sleeved on the outer surface of the support cylinder. The ventilation device drives the drum to rotate through the central rod, which in turn drives the traction belt to move, thereby realizing the linkage between the support cylinder and the turbine fan installed outside it. This causes the hot airflow to form disturbances or guided flows inside the drying device, which helps to enhance hot air circulation, improve the ventilation effect in the vegetable drying area, and increase drying efficiency and uniformity.

[0008] As a further embodiment of the present invention, a passive ring is fitted on the outer surface of the support cylinder, and a driving ring is provided on the side of the support cylinder away from the passive ring. The passive ring and the support cylinder are connected by multiple auxiliary rods, which are inserted inside the support cylinder and arranged in a ring shape. By setting a driving ring on the side of the support cylinder away from the passive ring and connecting the passive ring and the support cylinder by multiple ring-arranged auxiliary rods, stable support of the structure and effective transmission of force can be achieved during the operation of the device, improving the operational balance and response sensitivity of the turbofan linkage components, thereby helping to improve the operational reliability and drying uniformity of the hot airflow guiding device.

[0009] As a further embodiment of the present invention, a plurality of counterweight plates are rotatably mounted on the outer surface of the support cylinder. During the rotation of the support cylinder, the counterweight plates are driven to rotate, and the counterweight plates generate centrifugal force when rotating, which is used to enhance the stability of the device operation. This structure, by setting rotatable counterweight plates on the outer surface of the support cylinder and generating centrifugal force during rotation, can effectively improve the overall balance and anti-vibration capability of the drying device during operation and avoid the rotating parts from operating under unbalanced load.

[0010] As a further embodiment of the present invention, multiple pressure plates are rotatably installed on the inner end of the supporting shell. The pressure plates are located above the grid, and multiple guide plates are rotatably installed on the inner end of the grid. The center of the pressure plate protrudes, and the protruding part contacts the outer surface of the guide plate. When the pressure plate rotates in the direction of the grid, the protruding part of the pressure plate drives the guide plate to rotate.

[0011] As a further embodiment of the present invention, the bottom end of the limiting plate is fixedly installed with an air guide pipe by a clamp, and the output end of the air guide pipe is fixedly connected to multiple air outlets. The outer surface of the air outlet is fitted with an air outlet block. The air outlet block moves toward the shelf and passes through the shelf, and lifts up the vegetables to promote ventilation and prevent moisture from being covered by the vegetables, thus affecting the drying effect.

[0012] As a further embodiment of the present invention, a heating cylinder is fixedly installed on the upper inner side of the supporting shell by a clamp, and a conduction pipe is fixedly connected to the output end of the heating cylinder, and the output end of the conduction pipe is connected to the air guide pipe. Two driving rods are passed through the inner end of the conduction pipe, and a movable rod is provided between the two driving rods.

[0013] As a further embodiment of the present invention, the movable rod and the two driving rods are rotatably connected by a traction rod. When the movable rod moves in any direction, the two driving rods move towards each other through the traction rod. The interior of the heated cylinder is fitted with a sealing plug. By setting a traction rotation structure between the movable rod and the driving rods, the movement of the movable rod can simultaneously drive the two driving rods to move synchronously towards each other, which helps to achieve coordinated opening and closing or precise adjustment of the sealing structure.

[0014] As a further embodiment of the present invention, the end of the driving rod away from the movable rod passes through the inside of the sealing plug, and the sealing plug is connected to the heating cylinder by an auxiliary spring. A central block is fixedly installed inside the heating cylinder, and multiple limiting brackets are rotatably installed on the outer surface of the central block.

[0015] As a further embodiment of the present invention, an output pipe is provided on the side of the sealing plug away from the conduction pipe, and the output pipe is fixedly connected to the driving rod. The output pipe passes through the interior of the central block, and multiple air outlets are provided on the outer surface of the output pipe. This structure, by passing the output pipe through the interior of the central block and providing multiple air outlets on its outer surface, allows the gas in the heated cylinder to be released in a directional manner under the action of the driving rod, thereby achieving rapid depressurization and heat release, and improving gas discharge efficiency.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When using this invention, the rotation of the drum drives the traction belt, which in turn causes the lower pressure plate to rotate. After the guide plate rotates under force, it can adjust the direction of the hot air flow, guiding the hot air flow towards the inside of the support shell and further through the limiting plate, thereby enhancing the hot air effect on the vegetables in the center area of ​​the limiting plate, improving the drying effect in this area, solving the problem of slow drying of vegetables in the central area and the leeward area, and further improving drying efficiency and heat energy utilization.

[0018] 2. By setting a movable air outlet block, the present invention can lift the vegetables as it moves toward the shelf and passes through the shelf, causing the vegetables to turn over locally, thereby increasing the ventilation gap between the vegetables and preventing moisture from accumulating on the surface of the vegetables and affecting the drying efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the drying device.

[0020] Figure 2 This is an internal diagram of the drying equipment;

[0021] Figure 3 A schematic diagram of a shelf mounted on a limiting plate;

[0022] Figure 4 This is a schematic diagram of the structure when the limit plate is lifted.

[0023] Figure 5 A schematic diagram of the structure supporting the interior of the shell;

[0024] Figure 6 This is a schematic diagram of the internal structure of a ventilation duct;

[0025] Figure 7 This is a structural schematic diagram of the turbofan section;

[0026] Figure 8 This is a structural diagram of the pressure plate and the guide plate;

[0027] Figure 9 This is a schematic diagram showing the state when the guide plate is open;

[0028] Figure 10 This is a schematic diagram showing the positional relationship between the heated cylinder and the supporting shell.

[0029] Figure 11 This is a diagram showing the positional relationship between the air outlet block and the air outlet cylinder;

[0030] Figure 12 This is a schematic diagram of the internal structure of the heating cylinder and the conduction tube;

[0031] Figure 13 This is a schematic diagram of the internal structure of the heating cylinder.

[0032] In the picture: 1. Drying oven; 2. Heating unit; 3. Shelf;

[0033] 101. Limiting plate; 102. Air outlet block; 103. Air outlet pipe; 104. Air guide pipe;

[0034] 201. Support shell; 202. Ventilation duct; 203. Traction belt; 204. Drum; 205. Drive tube; 206. Center rod; 207. Support cylinder; 208. Turbofan; 209. Drive ring; 210. Return spring; 211. Counterweight plate; 212. Passive ring;

[0035] 21. Fence; 22. Guide plate; 23. Lower pressure plate; 24. Connecting strip;

[0036] 301. Heating cylinder; 302. Conducting pipe; 303. Traction block; 304. Connecting sleeve; 305. Movable rod; 306. Driving rod; 307. Auxiliary spring; 308. Sealing plug; 309. Isolation membrane; 310. Output pipe; 311. Limiting frame; 312. Center block. Detailed Implementation

[0037] 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.

[0038] Example 1: Please refer to Figure 1 - Figure 4 A pre-packaged vegetable drying device includes a drying box 1. A heating unit 2 is fixedly installed on the outer surface of the drying box 1 by bolts. The heating unit 2 heats the air sent into the box. An internal air supply module is integrated to form a circulating airflow. The specific working principle is a mature existing technology, which will not be elaborated here. The drying box 1 is equipped with multiple shelves 3. The vegetables to be dried are spread flat on the shelves 3 and placed inside the drying box 1. Then the partition door of the drying box 1 is closed, and the drying process of the vegetables begins. A limiting plate 101 is fixedly installed on the inner end of the drying box 1 by bolts. After the shelves 3 are placed inside the drying box 1, the shelves 3 rest on the upper end of the limiting plate 101. A support shell 201 is fixedly installed on the bottom end of the limiting plate 101.

[0039] Two ventilation pipes 202 are installed inside the support shell 201. The inlet of the ventilation pipe 202 points to the heating unit 2. The high-temperature airflow blown out by the heating unit 2 passes through the ventilation pipe 202. A grid 21 is fixedly installed at the center of the support shell 201. The hot airflow in the drying box 1 enters the interior of the support shell 201 through the grid 21. A ventilation device is provided between the support shell 201 and the ventilation pipe 202 to dry the central area of ​​the rack 3 that is not easily affected by the hot airflow, so as to achieve more uniform drying of vegetables. An air outlet device is provided at the top of the drying box 1. This device adopts existing mature technology and will not be described in detail.

[0040] like Figure 3 - Figure 6As shown, the outer surface of the limiting plate 101 has multiple holes, and each hole is provided with an air outlet block 102. Specifically, the holes on the outer surface of the shelf 3 correspond to the holes on the outer surface of the limiting plate 101. The outer surface of the limiting plate 101 is provided with a positioning groove, and a matching positioning block is fixedly installed on the outer surface of the shelf 3. After the shelf 3 is placed on the limiting plate 101, the positioning block must also pass through the outer surface of the limiting plate 101. At this time, the holes on the outer surface of the shelf 3 correspond to the ventilation pipe 202.

[0041] The ventilation device includes a central rod 206, which is rotatably installed inside the conduction pipe 302. A drum 204 is fixedly installed on the outer surface of the central rod 206, and a traction belt 203 is fixedly wound on the outer surface of the drum 204. A support cylinder 207 is fixedly installed on the outer surface of the central rod 206, and a turbo fan 208 is fixedly sleeved on the outer surface of the support cylinder 207. When the hot flow passes through the ventilation pipe 202, the turbo fan 208 drives the support cylinder 207 to rotate under the action of the airflow.

[0042] like Figure 6 , Figure 7 As shown, a passive ring 212 is sleeved on the outer surface of the support cylinder 207. A drive ring 209 is provided on the side of the support cylinder 207 away from the passive ring 212. The passive ring 212 is connected to the support cylinder 207 through multiple auxiliary rods, which are inserted inside the support cylinder 207 and arranged in a ring shape. The passive ring 212 is connected to the support cylinder 207 through a return spring 210. When subjected to force, the passive ring 212 moves towards the support cylinder 207 and compresses the return spring 210. After the force disappears, the return spring 210 pushes the passive ring 212 back to its original position.

[0043] Multiple counterweight plates 211 are rotatably mounted on the outer surface of the support cylinder 207. The counterweight plates 211 are connected to the support cylinder 207 by torsion springs. During the rotation of the support cylinder 207, the counterweight plates 211 are driven to rotate. The counterweight plates 211 generate centrifugal force when rotating, which drives the counterweight plates 211 to rotate themselves. Specifically, protrusions are fixedly installed on the outer surface of the counterweight plates 211. After the counterweight plates 211 are fully opened under the action of centrifugal force, the protrusions on their outer surface contact the outer surface of the passive ring 212. With the continuous rotation of the counterweight plates 211, the passive ring 212 is pushed to move.

[0044] More specifically, multiple protrusions are fixedly installed on the outer surface of the drive tube 205 near the support cylinder 207. The inner wall of the drive ring 209 is provided with grooves that match the protrusions. When the drive ring 209 is sleeved on the drive tube 205, the protrusions and grooves mesh. The rotation of the support cylinder 207 drives the drive tube 205 to rotate synchronously. The counterweight plate 211 generates an inertial force greater than its own weight during the rotation process. Therefore, the turbofan 208 rotates under the action of hot airflow, and the inertial force of the counterweight plate 211 drives the drive tube 205 to rotate.

[0045] Example 2: Please refer to Figure 8 - Figure 11 A vegetable pre-packaged food drying device, based on Embodiment 1, has multiple lower pressure plates 23 rotatably mounted on the inner end of the support shell 201 via a rotating shaft. The lower pressure plates 23 are located above the grid 21, and multiple guide plates 22 are rotatably mounted on the inner end of the grid 21. The center of the lower pressure plate 23 protrudes, and the protruding part contacts the outer surface of the guide plate 22. Specifically, when the lower pressure plate 23 rotates toward the grid 21, the protruding part of the lower pressure plate 23 drives the guide plate 22 to rotate. The guide plate 22 is engaged with the grid 21 by a torsion spring. After the guide plate 22 is rotated under force, it returns to its initial state by the torsion spring. The ends of the lower pressure plates 23 are connected by a connecting strip 24, and the free end of the traction belt 203 is fixedly connected to the connecting strip 24.

[0046] After the guide plate 22 is rotated under force, the hot airflow will be guided by the guide plate 22 to the inside of the support shell 201. Then the hot airflow will pass through the limiting plate 101 to dry the vegetables in the area that is difficult to dry in the center of the limiting plate 101.

[0047] The bottom end of the limiting plate 101 is fixedly installed with an air guide pipe 104 by a clamp. The output end of the air guide pipe 104 is fixedly connected to multiple air outlets 103. The outer surface of the air outlet 103 is fitted with an air outlet block 102. Specifically, the outer surface of the air outlet 103 is fitted with a sealing ring. The sealing ring and the outer surface of the air outlet block 102 are used to increase the sealing performance. The air outlet block 102 is hollow in the middle to facilitate the flow of air. The air outlet block 102 moves towards the shelf 3 and passes through the shelf 3, and lifts up the vegetables to promote ventilation and prevent moisture from being covered by the vegetables, which would affect the drying effect. At the same time, it can prevent heat loss during the drying of vegetables and ensure that the hot air directly acts on the vegetables in the center of the shelf 3 and the leeward side, avoiding uneven drying.

[0048] like Figure 10 , Figure 12 , Figure 13 As shown, a heating cylinder 301 is fixedly installed on the upper inner side of the support shell 201 by a clamp. The output end of the heating cylinder 301 is fixedly connected to a conduction pipe 302, and the output end of the conduction pipe 302 is connected to the air guide pipe 104. Specifically, the conduction pipe 302 is divided into two sections, and the two sections of the conduction pipe 302 are connected by a connecting sleeve 304. The connecting sleeve 304 is made of silicone rubber, which has high temperature resistance and fatigue resistance. A traction block 303 is sleeved on the outer surface of the connecting sleeve 304, and the end of the traction block 303 away from the limiting plate 101 is rotatably connected to the lower pressure plate 23.

[0049] Two driving rods 306 are inserted through the inner end of the conduction tube 302. A movable rod 305 is provided between the two driving rods 306. The movable rod 305 is located inside the connecting sleeve 304, and the movable rod 305 is rotatably connected to the two driving rods 306 through a traction rod. It is worth noting that the diameter of the two driving rods 306 is smaller than the inner diameter of the conduction tube 302 to ensure normal air flow. When the movable rod 305 moves in any direction, it drives the two driving rods 306 to move towards each other through the traction rod. The traction block 303 is sleeved on the outside of the movable rod 305 through the connecting sleeve 304. In order to ensure that the movable rod 305 moves in time when the traction block 303 moves, several protrusions are fixedly installed on the inner end of the traction block 303. The protrusions clamp the movable rod 305, and the shape of the connecting sleeve 304 also changes accordingly. There are gaps between the protrusions, so that the clamped connecting sleeve 304 still has the effect of transmitting air.

[0050] A sealing plug 308 is fitted inside the heating cylinder 301. The outer surface of the sealing plug 308 is tightly fitted to the inner wall of the heating cylinder 301. One end of the driving rod 306 away from the movable rod 305 passes through the inside of the sealing plug 308. The sealing plug 308 and the heating cylinder 301 are connected by an auxiliary spring 307. A center block 312 is fixedly installed inside the heating cylinder 301. Multiple limit frames 311 are rotatably installed on the outer surface of the center block 312 via a rotating shaft. The limit frames 311 are arranged in a ring. An isolation membrane 309 is fixedly fitted on the outer surface of the limit frame 311. The outer surface of the isolation membrane 309 is fitted to the inner wall of the heating cylinder 301 to prevent water flow on the left side while allowing water flow on the right side to be conducted to the left side.

[0051] An output pipe 310 is provided on the side of the sealing plug 308 away from the conduction pipe 302, and the output pipe 310 is fixedly connected to the drive rod 306. The output pipe 310 passes through the interior of the central block 312, and multiple air outlets are opened on the outer surface of the output pipe 310. By default, the air outlets are located on the left side of the central block 312. Water is filled between the isolation membrane 309 and the heating cylinder 301. An expansion ball for pressure buffering is provided inside the isolation membrane 309. The expansion ball can undergo reversible volume change when the pressure inside the heating cylinder 301 changes, so as to stabilize the gas. The pressure is suppressed to keep it relatively stable. When the output pipe 310 moves toward the sealing plug 308 until the water outlet on its outer surface is exposed to the right side of the central block 312, the water in the high temperature and high pressure state inside the isolation membrane 309 is rapidly released and sprayed out at high speed through the water outlet. The water vaporizes rapidly and absorbs a large amount of heat at the moment of spraying, causing the local temperature to drop sharply. This results in a significant temperature difference between the left and right sides of the isolation membrane 309, and the water vapor condenses back into water, allowing it to flow back to the left side of the isolation membrane 309.

[0052] The air volume of heating unit 2 is adjustable each time. An angle sensor is installed inside the guide plate 22. When the rotation of the guide plate 22 is detected, the fan in heating unit 2 will run for a period of time and then stop, and will start again after a certain interval to achieve periodic ventilation control.

[0053] The working principle of this invention is:

[0054] When in use, spread the vegetables that need to be dried evenly on the shelf 3, then place the shelf 3 on the upper end of the limiting plate 101 according to the positioning groove, then close the partition door of the drying box 1, start the heating unit 2, so that a stable high temperature airflow is formed inside the drying box 1. When the high temperature airflow inside the drying box 1 is flowing, part of the airflow passes through the interior of the ventilation pipe 202 and drives the turbine fan 208 to rotate. During the rotation of the turbine fan 208, the support cylinder 207 is rotated, and the counterweight plate 211 rotates accordingly.

[0055] After the counterweight plate 211 is fully opened under the action of centrifugal force, the protrusions on its outer surface contact the outer surface of the passive ring 212. As the counterweight plate 211 continues to rotate, it pushes the passive ring 212 to move, so that the drive ring 209 is sleeved on the outer surface of the drive tube 205. The drive tube 205 starts to rotate and drives the drum 204 to rotate. During the rotation of the drum 204, the connecting strip 24 is pulled by the traction belt 203, causing the lower pressure plate 23 to rotate, which in turn causes the guide plate 22 to rotate. After the guide plate 22 is rotated under force, when the hot air passes through, it will be guided by the guide plate 22 to the inside of the support shell 201. Then the hot air passes through the limiting plate 101, improving the drying efficiency of vegetables in the area that is difficult to dry in the center of the limiting plate 101.

[0056] Prior to this, the water inside the heating cylinder 301 was also heated to a high-pressure state. As the lower pressure plate 23 began to rotate, it moved the movable rod 305 through the traction block 303. When the movable rod 305 moved, it pulled the two driving rods 306 to move towards each other through the traction rod. At this time, when the driving rods 306 moved, they drove the output pipe 310 to move until the water outlet on its outer surface was exposed to the right side of the center block 312. The water inside the isolation membrane 309, which was in a high-temperature and high-pressure state, quickly released the pressure and was sprayed out at high speed through the water outlet. The water vaporized rapidly and absorbed a large amount of heat at the moment of spraying, causing the local temperature to drop sharply. This resulted in a significant temperature difference between the left and right sides of the isolation membrane 309, and the water vapor condensed back into water.

[0057] However, during the process of water being sprayed out from the left side of the isolation membrane 309 under high temperature and pressure, it is still in the process of depressurization. At this time, the sealing plug 308 begins to move away from the isolation membrane 309 under pressure. At this time, the auxiliary spring 307 is compressed and transports the gas to the inside of the air outlet 103 through the conduction pipe 302 and the air guide pipe 104. At this time, the air outlet block 102 begins to move as the pressure of the air outlet 103 increases, thereby lifting the vegetables on the shelf 3 and preventing the vegetables from losing heat during the drying process. The heat cannot be directly applied to the vegetables in the center of the shelf 3 and the leeward side, resulting in uneven drying.

[0058] Subsequently, the heating unit 2 stops operating, the turbo fan 208 stops rotating, the counterweight plate 211 returns to its initial state under the action of the torsion spring, the passive ring 212 returns to its initial state under the elastic force of the return spring 210, and the guide plate 22 also returns to its initial state under the elastic force of the torsion spring. The pressure plate 23 returns to its initial position under the reaction force of the guide plate 22 and pulls the traction belt 203 through the connecting strip 24.

[0059] The sealing plug 308 returns to its initial position under the elastic force of the auxiliary spring 307, squeezing the water on the right side of the isolation membrane 309 to the left side of the isolation membrane 309;

[0060] The above process will continue until the vegetables are completely dry.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A drying device for pre-packaged vegetables, comprising a drying chamber (1), characterized in that: A heating unit (2) is fixedly installed on the outer surface of the drying box (1). The heating unit (2) heats the air sent into the box. Multiple shelves (3) are provided inside the drying box (1). A limiting plate (101) is fixedly installed at the inner end of the drying box (1). After the shelf (3) is placed inside the drying box (1), the shelf (3) rests on the upper end of the limiting plate (101). A support shell (201) is fixedly installed at the bottom end of the limiting plate (101). Two ventilation pipes (202) are installed inside the support shell (201). A grid (21) is fixedly installed at the center of the support shell (201). The hot air flow in the drying box (1) enters the support shell (201) through the grid (21). A ventilation device is provided between the support shell (201) and the ventilation pipes (202) to dry the area in the center of the shelf (3) that is not easily affected by the hot air flow, so as to achieve more uniform drying of vegetables. The outer surface of the limiting plate (101) is provided with multiple holes, and each hole is provided with an air outlet block (102). The ventilation device includes a central rod (206), which is rotatably installed inside the conduction pipe (302). A drum (204) is fixedly installed on the outer surface of the central rod (206), and a traction belt (203) is fixedly wound on the outer surface of the drum (204). A support cylinder (207) is fixedly installed on the outer surface of the central rod (206), and a turbo fan (208) is fixedly sleeved on the outer surface of the support cylinder (207). A passive ring (212) is sleeved on the outer surface of the support cylinder (207). A driving ring (209) is provided on the side of the support cylinder (207) away from the passive ring (212). The passive ring (212) is connected to the support cylinder (207) by a plurality of auxiliary rods. The auxiliary rods are inserted inside the support cylinder (207) and are arranged in a ring shape. Multiple counterweight plates (211) are rotatably mounted on the outer surface of the support cylinder (207). During the rotation of the support cylinder (207), the counterweight plates (211) are driven to rotate, and the counterweight plates (211) generate centrifugal force when rotating, driving the counterweight plates (211) to rotate themselves. Multiple pressure plates (23) are rotatably installed on the inner end of the support shell (201). The pressure plates (23) are located above the grid (21), and multiple guide plates (22) are rotatably installed on the inner end of the grid (21). The center of the pressure plate (23) protrudes, and the protruding part contacts the outer surface of the guide plate (22). When the pressure plate (23) rotates in the direction of the grid (21), the protruding part of the pressure plate (23) drives the guide plate (22) to rotate. The bottom end of the limiting plate (101) is fixedly installed with an air guide pipe (104) by a clamp. The output end of the air guide pipe (104) is fixedly connected to multiple air outlets (103). The outer surface of the air outlet (103) is fitted with an air outlet block (102). The air outlet block (102) moves toward the shelf (3) and passes through the shelf (3), and lifts up the vegetables to promote ventilation and prevent moisture from being covered by the vegetables, thus affecting the drying effect.

2. The vegetable pre-packaged food drying device according to claim 1, characterized in that: The upper inner side of the support shell (201) is fixedly installed with a heating cylinder (301) by a clamp. The output end of the heating cylinder (301) is fixedly connected to a conduction pipe (302), and the output end of the conduction pipe (302) is connected to the air guide pipe (104). Two driving rods (306) are inserted through the inner end of the conduction pipe (302), and a movable rod (305) is provided between the two driving rods (306).

3. The vegetable pre-packaged food drying device according to claim 2, characterized in that: The movable rod (305) and the two driving rods (306) are rotatably connected by a traction rod. When the movable rod (305) moves in any direction, the two driving rods (306) move towards each other through the traction rod. The heating cylinder (301) is fitted with a sealing plug (308).

4. A vegetable pre-packaged food drying device according to claim 3, characterized in that: The end of the driving rod (306) away from the movable rod (305) passes through the inside of the sealing plug (308), and the sealing plug (308) is connected to the heating cylinder (301) by an auxiliary spring (307). A center block (312) is fixedly installed inside the heating cylinder (301), and multiple limit brackets (311) are rotatably installed on the outer surface of the center block (312).

5. A vegetable pre-packaged food drying apparatus according to claim 4, characterized in that: The sealing plug (308) has an output pipe (310) on the side away from the conduction pipe (302), and the output pipe (310) is fixedly connected to the driving rod (306). The output pipe (310) passes through the interior of the center block (312), and the outer surface of the output pipe (310) has multiple air outlets.

Images