Multi-layer hanger type energy-saving low-temperature drying curing barn structure for vegetable dehydration

Abstract

The invention relates to the technical field of drying equipment, in particular to a multilayer rack type energy-saving low-temperature drying curing barn structure for vegetable dehydration, which comprises a drying box and a plurality of movable vegetable placing racks regularly arranged in the drying box, the movable vegetable placing frame comprises a reinforcing bottom plate, a transmission part arranged in the reinforcing bottom plate, two sets of placing mechanisms arranged in parallel and a connecting part arranged between the two sets of placing mechanisms. According to the multi-layer hanger type energy-saving low-temperature drying curing barn structure for vegetable dehydration, when the placement shaft rotates, the spiral hangers rotate through the spiral curved surface structures of the spiral hangers, bottom-to-top spiral ascending airflow can be formed between adjacent vegetables, and meanwhile, the mode can make the vegetables swing periodically, so that the vegetable dehydration effect is improved. The problem that a hot air circulation path of a traditional fixed type hanging frame is blocked is effectively solved, and the piston plate which reciprocates up and down in the sealing cover body is matched, so that flowing of airflow is accelerated, loss of moisture in vegetables is accelerated, and the drying effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to a multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration. Background Art

[0002] The vegetable drying device is a device that uses the principle of hot air circulation to quickly remove moisture from vegetables by controlling parameters such as temperature, humidity and time. It has the characteristics of high efficiency and energy saving, uniform drying and easy operation. It can effectively extend the shelf life of vegetables, increase added value, and expand sales channels. It is suitable for drying a variety of vegetables and is an indispensable part of modern agricultural production.

[0003] The patent with application number CN202420002120.4 discloses a vegetable drying device, which includes a base plate, a box body arranged above the base plate, and a box door arranged on the box body. A support shaft is fixed to the base plate on one side of the bottom of the box body, and a support tube is also fixed to the bottom of the box body. The support shaft passes through the support tube at the corresponding position and is rotatably connected to the support tube. A positioning shaft is also fixed on the other side of the bottom of the box body. A plurality of hydraulic cylinders rotatably connected to the base plate are also arranged on the base plate, and positioning blocks are fixed at the ends of the piston rods of the hydraulic cylinders. The positioning blocks are connected to the positioning shafts through push rods. An air intake pipe connected to a hot air blower is fixed on the box body, and a plurality of air distribution plates are evenly fixed in the box body.

[0004] However, the material carrying systems of mainstream vegetable drying devices currently mostly adopt a static stacked shelf structure or a parallel array hanging rod structure. Such traditional designs have significant technical limitations. When processing leafy vegetables with high specific surface area, such as chrysanthemum and cabbage, local moisture accumulation is significant due to the stacking effect of the leaves, and a gradient difference between the surface and internal moisture is easily produced. The rigid fixed material layout will form a fluid boundary layer blocking effect, which can reduce the air flow rate in the drying chamber and block the hot air circulation path, thereby reducing the drying effect of the overall device.

[0005] In view of this, we propose a multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration. Summary of the invention

[0006] The object of the present invention is to provide a multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration comprises a drying box and a plurality of movable vegetable placement racks regularly arranged inside the drying box, wherein the drying box comprises a fixed box body, a heating component arranged on the inner wall of the fixed box body, and a plurality of ventilation fans regularly distributed on the top surface of the fixed box body;

[0009] The drying box further comprises a driving unit arranged inside the fixed box body, wherein the driving unit comprises a driving motor and a driving shaft arranged on an output shaft of the driving motor;

[0010] The mobile vegetable placement rack comprises a reinforced bottom plate, a transmission part arranged inside the reinforced bottom plate, two sets of placement mechanisms arranged in parallel, and a connecting part arranged between the two sets of placement mechanisms;

[0011] The transmission part includes a transmission shaft, a group of worm gears that rotate as the transmission shaft rotates, a plurality of regularly distributed limiting protrusions at one end of the transmission shaft, and a docking shaft at the other end, wherein the docking shaft is sleeved with a plurality of limiting protrusions on another transmission shaft to transmit rotational motion;

[0012] The placement mechanism includes a placement shaft that rotates with the rotation of the worm gear, a spiral hanger that is sleeved on the outside of the placement shaft for hanging vegetables, a sealing cover body that is sleeved on the outside of the placement shaft, and a piston plate that is arranged on the inside of the sealing cover body. An air inlet valve is provided at a position near the top of the outer wall of the sealing cover body, and a plurality of regularly distributed air outlet nozzles are clamped on the top surface of the sealing cover body. A bidirectional threaded groove is opened on the outer wall of the placement shaft inside the sealing cover body. After the placement shaft rotates, it drives the piston plate to move back and forth up and down inside the sealing cover body, and cooperates with the air inlet valve and the air outlet nozzle to generate an airflow from bottom to top on the inner side of the spiral hanger, thereby accelerating the loss of moisture inside the vegetables and drying them.

[0013] In the technical solution of the present invention, two parallel limiting slide grooves are provided on the inner bottom surface of the fixed box, the heating component and the ventilation fan are fixedly connected to the inner wall of the fixed box by bolts, and an observation window is glued and fixed to the inner side of one open end of the fixed box.

[0014] In the technical solution of the present invention, the drive motor is fixedly connected to the inner bottom surface of the fixed box by bolts, the drive shaft is coaxially connected to the output shaft of the drive motor, and a plurality of regularly distributed shaft grooves that penetrate inside and outside are opened on the outer wall of the drive shaft.

[0015] In the technical solution of the present invention, a space for placing a transmission part and a connecting part is opened inside the reinforced base plate, and movable pulleys are fixedly connected to the bottom corners of the reinforced base plate by bolts. The movable pulleys are slidably connected to the limiting slide grooves to limit the moving range of the reinforced base plate.

[0016] In the technical solution of the present invention, the rotation of the transmission shaft is connected to the inner wall of the reinforced base plate, one end of the transmission shaft extends to the outside of the reinforced base plate and the end is provided with a number of regularly distributed placement grooves for placing limiting protrusions, and a worm meshing with the worm wheel is sleeved on the outer wall of the transmission shaft.

[0017] In the technical solution of the present invention, the limiting protrusion is slidably connected to the inner side of the placement groove, and a plurality of regularly distributed pressure springs are welded on the bottom surface of the limiting protrusion, and the bottom end of the pressure spring is welded to the inner groove wall of the placement groove.

[0018] In the technical solution of the present invention, the elastic force provided by the pressure spring pushes the limiting protrusion to move outward, and a plurality of docking grooves with the same number, corresponding positions and matching sizes as the limiting protrusions are opened on the outer wall of the docking shaft. After the limiting protrusion extends to the shaft body slot inside the driving shaft, the driving shaft rotates under the drive of the driving motor, and the transmission shaft rotates as a whole.

[0019] In the technical solution of the present invention, the bottom end of the placement shaft is rotatably connected to the bottom surface of the reinforced bottom plate, the worm gear is fixedly connected to the outer wall of the placement shaft by a bayonet, a number of regularly distributed connecting rods are welded and fixed between the placement shaft and the spiral hanger, and a number of regularly distributed frame openings are provided on the spiral hanger for providing a hanging base point for vegetables. As the placement shaft rotates, the spiral hanger disturbs the air inside the fixed box to flow from bottom to top.

[0020] In the technical solution of the present invention, the sealing cover body is clamped and fixed on the top surface of the reinforced bottom plate, and a plurality of regularly distributed air vents are provided at the bottom of the outer side wall of the sealing cover body. The piston plate is sleeved on the outer side of the bidirectional thread groove, and its size is adapted to the inner side size of the piston plate. The air inlet valve and the air outlet nozzle are both threadedly connected to the outer side wall of the sealing cover body.

[0021] In the technical solution of the present invention, the connecting part includes a pulley fixedly connected to the outer wall of the transmission shaft by a pin and a transmission belt sleeved on the outside of several pulleys. When one group of pulleys rotates, the transmission belt transmits power and drives another group of pulleys to rotate accordingly.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration, when the placement axis rotates, the spiral rack can form a spiral upward airflow from bottom to top between adjacent vegetables through its own spiral curved surface structure. At the same time, this mode can make the vegetables swing periodically, effectively reducing the problem of obstruction of the hot air circulation path of the traditional fixed rack, and cooperate with the piston plate that moves back and forth up and down inside the sealed cover to accelerate the flow of air, thereby accelerating the loss of moisture inside the vegetables and improving the drying effect.

[0024] 2. The multi-layer hanging rack type energy-saving low-temperature drying room structure for vegetable dehydration has a transmission part inside each of the multiple groups of mobile vegetable placement racks. After the transmission shafts in two adjacent transmission parts are connected with each other, they cooperate with the connecting part to allow the multiple groups of placement shafts to rotate at the same time, thereby reducing the investment in additional driving equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 It is a schematic cross-sectional view of the structure of the drying box in the present invention;

[0028] Figure 4 It is a schematic diagram of the structural disassembly of the driving part in the present invention;

[0029] Figure 5 It is a schematic cross-sectional view of the structure of the mobile vegetable placement rack in the present invention;

[0030] Figure 6 It is a structural schematic diagram of the transmission part in the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified schematic diagram of part A;

[0032] Figure 8 It is a structural schematic diagram of the placement mechanism in the present invention;

[0033] Fig. 9 It is a partial structural schematic diagram of the placement mechanism in the present invention;

[0034] Fig.10 It is a structural schematic diagram of the connecting part in the present invention;

[0035] Description of reference numerals:

[0036] 100, drying box; 110, fixed box body; 111, limit slide; 120, heating component; 130, ventilation fan; 140, observation window; 150, driving part; 151, driving motor; 152, driving shaft; 1520, shaft body slot;

[0037] 200, mobile vegetable placement rack; 210, reinforced bottom plate; 220, movable pulley; 230, transmission part; 231, transmission shaft; 2310, placement groove; 232, worm; 233, worm wheel; 234, limiting protrusion; 235, pressure spring; 236, docking shaft; 2360, docking groove; 240, placement mechanism; 241, placement shaft; 2410, two-way thread groove; 242, spiral hanger; 2420, frame opening; 243, connecting rod; 244, sealing cover; 245, piston plate; 246, intake valve; 247, exhaust nozzle; 250, connection part; 251, pulley; 252, transmission belt. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 10 As shown, this embodiment provides a technical solution:

[0040] The multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration comprises a drying box 100 and a plurality of movable vegetable placement racks 200 regularly arranged inside the drying box 100, wherein the drying box 100 comprises a fixed box body 110, a heating component 120 arranged on the inner wall of the fixed box body 110, and a plurality of ventilation fans 130 regularly distributed on the top surface of the fixed box body 110;

[0041] In this embodiment, Figure 3-Figure 4 As shown, the drying box 100 further includes a driving unit 150 disposed inside the fixed box body 110 , and the driving unit 150 includes a driving motor 151 and a driving shaft 152 disposed on an output shaft of the driving motor 151 .

[0042] Specifically, two parallel limiting grooves 111 are provided on the inner bottom surface of the fixed box 110, the heating component 120 and the ventilation fan 130 are fixed to the inner wall of the fixed box 110 by bolts, and an observation window 140 is adhered and fixed to the inner side of an open end of the fixed box 110.

[0043] Furthermore, the drive motor 151 is fixedly connected to the inner bottom surface of the fixed box 110 by bolts, the drive shaft 152 is coaxially connected to the output shaft of the drive motor 151, and the outer side wall of the drive shaft 152 is provided with a plurality of regularly distributed shaft grooves 1520 that penetrate inside and outside.

[0044] Furthermore, a pair of doors are hingedly connected to an opening on one side of the fixed box body 110. The heating component 120 is used to heat the internal temperature of the fixed box body 110 after being started. The ventilation fan 130 is used to discharge moisture from the vegetables out of the interior of the fixed box body 110. The observation window 140 is used to facilitate the operator to observe the internal conditions of the fixed box body 110. After the drive motor 151 is started, it drives the drive shaft 152 to rotate.

[0045] In this embodiment, Figure 5 As shown, the mobile vegetable placement rack 200 includes a reinforced bottom plate 210, a transmission part 230 arranged inside the reinforced bottom plate 210, two sets of placement mechanisms 240 arranged in parallel, and a connecting part 250 arranged between the two sets of placement mechanisms 240.

[0046] Specifically, a space is opened inside the reinforced base plate 210 for placing the transmission part 230 and the connecting part 250. The bottom corners of the reinforced base plate 210 are fixedly connected with movable pulleys 220 by bolts. The movable pulley 220 is slidably connected to the limiting slide groove 111 to limit the moving range of the reinforced base plate 210.

[0047] Furthermore, the reinforced bottom plate 210 is used to ensure the strength of the movable vegetable placement rack 200 , and the movable pulley 220 is used to facilitate the movement between the reinforced bottom plates 210 .

[0048] In this embodiment, Figure 6-Figure 7 As shown, the transmission part 230 includes a transmission shaft 231, a group of worm gears 233 that rotate as the transmission shaft 231 rotates, a plurality of regularly distributed limiting protrusions 234 are provided at one end of the transmission shaft 231, and a docking shaft 236 is provided at the other end. The docking shaft 236 is sleeved with a plurality of limiting protrusions 234 on another transmission shaft 231 to transmit rotational motion.

[0049] Specifically, the transmission shaft 231 is rotatably connected to the inner wall of the reinforcing base plate 210, one end of the transmission shaft 231 extends to the outer side of the reinforcing base plate 210 and a plurality of regularly distributed placement grooves 2310 for placing the limiting protrusions 234 are opened at the end, and a worm 232 meshing with the worm wheel 233 is sleeved on the outer wall of the transmission shaft 231.

[0050] Furthermore, the limiting protrusion 234 is slidably connected to the inner side of the placement groove 2310 , and a plurality of regularly distributed pressure springs 235 are welded on the bottom surface of the limiting protrusion 234 , and the bottom end of the pressure spring 235 is welded to the inner groove wall of the placement groove 2310 .

[0051] Furthermore, the elastic force provided by the pressure spring 235 pushes the limiting protrusion 234 to move outward, and a plurality of docking grooves 2360 are opened on the outer wall of the docking shaft 236, which are the same in number, have corresponding positions and are matched in size as the limiting protrusion 234. After the limiting protrusion 234 extends to the shaft body slot 1520 inside the driving shaft 152, the driving shaft 152 rotates under the drive of the driving motor 151, and the transmission shaft 231 rotates as a whole.

[0052] Furthermore, after the transmission shaft 231 rotates, the two worm gears 232 on its outer wall also rotate, driving the two worm wheels 233 to rotate together. Under the action of the pressure spring 235, the limiting protrusion 234 extends to the outside of the placement groove 2310 and extends to the inside of the docking groove 2360 of another docking shaft 236, allowing multiple transmission shafts 231 to rotate at the same time.

[0053] In this embodiment, Figure 8-Figure 9 As shown, the placement mechanism 240 includes a placement shaft 241 that rotates as the worm gear 233 rotates, a spiral hanger 242 that is sleeved on the outside of the placement shaft 241 for hanging vegetables, a sealing cover body 244 that is sleeved on the outside of the placement shaft 241, and a piston plate 245 that is arranged on the inside of the sealing cover body 244. An air intake valve 246 is provided at a position near the top of the outer wall of the sealing cover body 244, and a plurality of regularly distributed air outlet nozzles 247 are clamped on the top surface of the sealing cover body 244. A bidirectional thread groove 2410 is provided on the outer wall of the placement shaft 241 inside the sealing cover body 244. After the placement shaft 241 rotates, it drives the piston plate 245 to move back and forth up and down inside the sealing cover body 244, and cooperates with the air intake valve 246 and the air outlet nozzle 247 to generate an airflow from bottom to top on the inner side of the spiral hanger 242, thereby accelerating the loss of moisture inside the vegetables and making them dry.

[0054] Specifically, the bottom end of the placement shaft 241 is rotatably connected to the bottom surface of the reinforced bottom plate 210, and the worm gear 233 is fixedly connected to the outer wall of the placement shaft 241 by a pin. A number of regularly distributed connecting rods 243 are welded and fixed between the placement shaft 241 and the spiral hanger 242. The spiral hanger 242 is provided with a number of regularly distributed frame openings 2420 for providing a hanging base point for vegetables. As the placement shaft 241 rotates, the spiral hanger 242 disturbs the air inside the fixed box 110 to flow from bottom to top.

[0055] Furthermore, the sealing cover body 244 is clamped and fixed on the top surface of the reinforced bottom plate 210, and a plurality of regularly distributed ventilation holes are opened at the bottom of the outer side wall of the sealing cover body 244. The piston plate 245 is sleeved on the outer side of the bidirectional thread groove 2410, and the size is adapted to the inner size of the piston plate 245. The air inlet valve 246 and the air outlet nozzle 247 are both threadedly connected to the outer side wall of the sealing cover body 244.

[0056] Furthermore, when the worm gear 233 rotates, it will drive the placement shaft 241 to rotate, and the spiral hanger 242 for placing vegetables will rotate. Through the spiral structure of the spiral hanger 242 itself, after it rotates, the air flow between the vegetables will flow from bottom to top. The piston plate 245 mounted on the outside of the two-way thread groove 2410 will also move back and forth up and down inside the sealing cover 244 after the placement shaft 241 rotates, allowing the air flow to enter the interior of the sealing cover 244 through the air inlet valve 246, and then be ejected by a plurality of air outlet nozzles 247, thereby accelerating the flow of air inside the spiral hanger 242.

[0057] In this embodiment, Fig.10 As shown, the connecting portion 250 includes a pulley 251 fixedly connected to the outer wall of the transmission shaft 231 by a pin and a transmission belt 252 sleeved on the outside of a plurality of pulleys 251. When one set of pulleys 251 rotates, the transmission belt 252 transmits power and drives another set of pulleys 251 to rotate accordingly.

[0058] Furthermore, a plurality of pulleys 251 are used to cooperate with the transmission belt 252 so that when one set of placement shafts 241 rotates, another set of placement shafts 241 will rotate simultaneously.

[0059] Finally, it should be noted that the heating component 120, ventilation fan 130 and drive motor 151 involved in the present invention are all universal standard parts or parts known to technical personnel in this field, and their structures and principles are all known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle space of this device, the heating component 120, ventilation fan 130 and drive motor 151 are connected to the external power supply through wires. The specific connection means should refer to the working principle of the present invention. The electrical connections between the electrical components are completed in a sequential working order, and the detailed connection means are all well-known technologies in the field.

[0060] When the multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration of the present invention is used, the door of the fixed box 110 is opened, and the mobile vegetable placement racks 200 hung with vegetables are pushed into the interior of the fixed box 110 in sequence, and the plurality of limiting protrusions 234 of the transmission part 230 of the innermost mobile vegetable placement rack 200 are inserted into the interior of the driving shaft 152;

[0061] Then, the door of the fixed box 110 is closed, and the heating component 120 and the ventilation fan 130 are turned on. After the internal temperature of the fixed box 110 rises, the driving motor 151 is started to drive the driving shaft 152 to rotate.

[0062] Then, the rotation of the driving shaft 152 drives the transmission shaft 231 in the transmission part 230 to rotate, and the two worm gears 232 that rotate accordingly drive the worm wheel 233 sleeved on the outside of a set of placement shafts 241 to rotate, and drive the set of placement shafts 241 to rotate;

[0063] After a set of placement shafts 241 rotates, the pulleys 251 sleeved on the outer wall thereof rotate accordingly, and through the transmission belt 252, another set of pulleys 251 are driven to rotate simultaneously;

[0064] When the placement shaft 241 rotates, the spiral hanger 242 is driven to rotate as a whole through the connecting rod 243, so that the airflow generated between the hung vegetables moves from top to bottom, so that the vegetables move, reducing the influence of the leaf stacking effect on drying, and the piston plate 245 sleeved on the outside of the bidirectional thread groove 2410 will reciprocate up and down inside the sealing cover 244;

[0065] When the piston plate 245 moves downward, the airflow outside the sealing cover 244 enters the interior of the sealing cover 244 through the air inlet valve 246, and after the piston plate 245 moves upward, the airflow is ejected from the air outlet nozzle 247, thereby accelerating the flow speed of the internal airflow of the spiral hanger 242, reducing the problem of obstruction of the hot air circulation path, and accelerating the loss of moisture inside the vegetables.

[0066] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A multi-layer rack-type energy-saving low-temperature drying oven structure for vegetable dehydration, comprising a drying box (100) and a plurality of movable vegetable placement racks (200) regularly arranged inside the drying box (100), wherein the drying box (100) comprises a fixed box body (110), a heating component (120) arranged on the inner side wall of the fixed box body (110), and a plurality of ventilation fans (130) regularly distributed on the top surface of the fixed box body (110); Features: The drying box (100) further comprises a driving unit (150) arranged inside the fixed box body (110), wherein the driving unit (150) comprises a driving motor (151) and a driving shaft (152) arranged on an output shaft of the driving motor (151); The mobile vegetable placement rack (200) comprises a reinforced bottom plate (210), a transmission part (230) arranged inside the reinforced bottom plate (210), two sets of placement mechanisms (240) arranged in parallel, and a connecting part (250) arranged between the two sets of placement mechanisms (240); The transmission part (230) comprises a transmission shaft (231), a group of worm gears (233) that rotate as the transmission shaft (231) rotates, one end of the transmission shaft (231) is provided with a plurality of regularly distributed limiting protrusions (234), and the other end is provided with a docking shaft (236), the docking shaft (236) being sleeved with the plurality of limiting protrusions (234) on another transmission shaft (231) to transmit rotational motion; The placement mechanism (240) comprises a placement shaft (241) that rotates as the worm gear (233) rotates, a spiral hanger (242) sleeved on the outside of the placement shaft (241) for hanging vegetables, a sealing cover (244) sleeved on the outside of the placement shaft (241), and a piston plate (245) arranged on the inside of the sealing cover (244); an air intake valve (246) is provided at a position near the top of the outer wall of the sealing cover (244); and a top surface of the sealing cover (244) is provided with a gas inlet valve (246). A plurality of regularly distributed air outlet nozzles (247) are clamped on the upper portion, and a bidirectional thread groove (2410) is provided on the outer wall of the placement shaft (241) inside the sealing cover (244). When the placement shaft (241) rotates, it drives the piston plate (245) to move up and down inside the sealing cover (244), and cooperates with the air inlet valve (246) and the air outlet nozzle (247) to generate an air flow from bottom to top on the inner side of the spiral hanger (242), thereby accelerating the loss of moisture inside the vegetables and drying them.

2. The multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration according to claim 1 is characterized in that: Two parallel limiting slide grooves (111) are provided on the inner bottom surface of the fixed box (110); the heating component (120) and the ventilation fan (130) are both fixedly connected to the inner wall of the fixed box (110) by bolts; and an observation window (140) is adhesively fixed to the inner side of an open end of the fixed box (110).

3. The multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration according to claim 1 is characterized in that: The drive motor (151) is fixedly connected to the inner bottom surface of the fixed box (110) by means of bolts, the drive shaft (152) is coaxially connected to the output shaft of the drive motor (151), and a plurality of regularly distributed shaft body slots (1520) that penetrate inside and outside are formed on the outer side wall of the drive shaft (152).

4. The multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration according to claim 1 is characterized in that: The reinforcing bottom plate (210) has a space inside for accommodating the transmission part (230) and the connection part (250). The bottom corners of the reinforcing bottom plate (210) are fixedly connected with movable pulleys (220) by bolts. The movable pulleys (220) are slidably connected to the limiting sliding grooves (111) to limit the moving range of the reinforcing bottom plate (210).

5. The multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration according to claim 1 is characterized in that: The transmission shaft (231) is rotatably connected to the inner side wall of the reinforcing bottom plate (210); one end of the transmission shaft (231) extends to the outside of the reinforcing bottom plate (210) and is provided with a plurality of regularly distributed placement grooves (2310) for placing limiting protrusions (234); and a worm (232) meshing with the worm wheel (233) is sleeved on the outer side wall of the transmission shaft (231).

6. The multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration according to claim 1 is characterized in that: The limiting protrusion (234) is slidably connected to the inner side of the placement groove (2310), and a plurality of regularly distributed pressure springs (235) are welded to the bottom surface of the limiting protrusion (234), and the bottom end of the pressure spring (235) is welded to the inner groove wall of the placement groove (2310).

7. The multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration according to claim 6 is characterized in that: The elastic force provided by the pressure spring (235) pushes the limiting protrusion (234) to move outward, and a plurality of docking grooves (2360) having the same number, corresponding positions and matching sizes as the limiting protrusions (234) are provided on the outer side wall of the docking shaft (236). After the limiting protrusion (234) extends to the shaft body slot (1520) inside the driving shaft (152), the driving shaft (152) rotates under the drive motor (151), thereby causing the transmission shaft (231) to rotate as a whole.

8. The multi-layer rack-type energy-saving low-temperature drying room structure for vegetable dehydration according to claim 1 is characterized in that: The bottom end of the placement shaft (241) is rotatably connected to the bottom surface of the reinforced bottom plate (210); the worm wheel (233) is fixedly connected to the outer wall of the placement shaft (241) via a bayonet; a plurality of regularly distributed connecting rods (243) are welded and fixed between the placement shaft (241) and the spiral hanger (242); a plurality of regularly distributed frame openings (2420) for providing hanging base points for vegetables are provided on the spiral hanger (242); and the spiral hanger (242) rotates with the placement shaft (241), thereby disturbing the air inside the fixed box (110) to flow from bottom to top.

9. The multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration according to claim 1 is characterized in that: The sealing cover body (244) is snap-fitted and fixed on the top surface of the reinforcing bottom plate (210); a plurality of regularly distributed ventilation holes are provided at the bottom of the outer wall of the sealing cover body (244); the piston plate (245) is sleeved on the outer side of the bidirectional thread groove (2410) and has a size that matches the inner size of the piston plate (245); the air inlet valve (246) and the air outlet nozzle (247) are both threadedly connected to the outer wall of the sealing cover body (244).

10. The multi-layer rack-type energy-saving low-temperature drying and baking room structure for vegetable dehydration according to claim 1 is characterized in that: The connecting portion (250) comprises a pulley (251) fixedly connected to the outer wall of the transmission shaft (231) via a bayonet and a transmission belt (252) sleeved on the outer sides of a plurality of pulleys (251). When one set of pulleys (251) rotates, the transmission belt (252) transmits power, thereby driving another set of pulleys (251) to rotate accordingly.

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