Radio frequency heating and drying device

Abstract

The invention relates to the technical field of agricultural product processing, and discloses a radio frequency heating drying device which comprises a base plate, a radio frequency heating system and a storage mechanism used for placing materials, an upper polar plate and a lower polar plate are arranged on the base plate, the radio frequency heating system is connected with the upper polar plate and the lower polar plate, and the storage mechanism is located between the upper polar plate and the lower polar plate. The storage mechanism comprises a first shell and a second shell, a storage cavity is defined by the first shell and the second shell, a clamping column is fixedly installed at the lower end of the second shell, a clamping groove matched with the clamping column is formed in the first shell, a partition plate is arranged between the first shell and the second shell, and the partition plate is fixedly installed in the storage cavity. The partition plate divides the storage cavity into an upper part and a lower part, and conical grooves are formed in the upper end and the lower end of the partition plate. The invention aims to solve the problem that when an existing radio frequency heating and drying device is used, the temperature of a barrel opening of a material barrel is still higher than that of other positions, and materials located at the barrel opening are prone to being excessively heated.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural product processing, and particularly relates to a radio frequency heating drying device. Background Art

[0002] As a new heating technology, electromagnetic dielectric heating has been extensively applied and researched in recent years for its rapid, clean, and controllable characteristics. Radio frequency (RF) heating technology (30 kHz to 300 MHz) offers excellent selective heating and overall heating effects for large materials, and holds great promise for future applications. However, RF heating technology also suffers from the fact that its electric field distribution can be distorted by the shape of the material and the dielectric loss factor, leading to uneven heating. This is especially true when the dielectric loss factor increases with the moisture content of the material, further reducing the uniformity of RF heating. This non-uniform heating not only fails to achieve the desired heating effect but also damages the material quality, particularly damaging the nutritional content of heat-sensitive foods and agricultural products.

[0003] Chinese invention patent CN113645725B proposes a self-regulating device for radio frequency heating uniformity, comprising an RF heating system, an optical fiber temperature measurement system, a material barrel, and an electromagnetic waveguide. The RF heating system is connected to an upper plate and a lower plate. The RF heating device also includes a base plate, on which the RF heating system, the upper plate, and the lower plate are mounted. A carrier is slidably mounted on the base plate, the carrier being located between the upper plate and the lower plate. The material barrel is located on the carrier and is cylindrical in shape. The material barrel has a mounting hole. The electromagnetic waveguide includes a connecting plate and an electromagnetic waveguide frame. The connecting plate is removably mounted in the mounting hole. The electromagnetic waveguide frame is fixedly mounted on the connecting plate. The electromagnetic waveguide frame is cylindrical and coaxial with the material barrel. This device aims to address the problem of overheating at the corners of current electromagnetic waveguides, which often occur at these corners. However, when this device is in use, the temperature at the barrel mouth is still higher than at other locations, which can easily lead to overheating of the material at the barrel mouth. Therefore, we proposed a radio frequency heating drying device to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that when the current radio frequency heating drying device is in use, the temperature at the barrel mouth of the material barrel is still higher than that at other positions, which easily leads to overheating of the material at the barrel mouth.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0006] The cam is connected to the upper and lower plates, and the cam is connected to the lower plates by a spring, and the cam is connected to the upper and lower plates by a spring. The cam is connected to the upper and lower plates by a spring, and the cam is connected to the upper and lower plates by a spring. The cam is connected to the upper and lower plates by a spring, and the cam is connected to the lower plates by a spring.

[0007] Further defined, the first and second shells are both hemispherical, with ventilation holes defined at the bottom of the first shell and the top of the second shell. A degassing assembly is located within the ventilation holes. A support rod is fixedly mounted on the base plate, a shroud is fixedly mounted on the support rod, and a fan is located within the shroud, with the air outlet of the shroud facing the top of the storage mechanism. This structural design, with the hemispherical shape of the first and second shells, reduces the risk of overheating at sharp corners. Furthermore, when the fan is operating, it accelerates the air flow above the ventilation holes, allowing moisture within the first and second shells to be quickly expelled, thereby improving exhaust efficiency.

[0008] The partition plate in the storage chamber is further defined as being disc-shaped, with a positioning block fixedly mounted on a side of the partition plate, and a positioning groove adapted to fit the positioning block formed on the first housing. This structural design facilitates assembly of the partition plate through the positioning block and the positioning groove.

[0009] The degassing assembly further comprises two rotating heads and a torsion spring. The two rotating heads are movably mounted within the air vents of the first and second shells, respectively. The two rotating heads are rotatably mounted to the inner walls of the first and second shells via rotating shafts, respectively. The torsion spring is disposed at the connection between the rotating shafts. This structural design, through the cooperation of the rotating heads and the torsion spring, allows steam generated by heating within the storage chamber to be released when the first or second shell is rotated upward.

[0010] It is further defined that a collection box for holding materials is movably mounted on the base plate, and a guide groove is provided above the collection box for use therewith. With such a structural design, the guide groove can guide the dry materials into the collection box for easy collection.

[0011] The invention further defines that a first mounting plate and a second mounting plate are fixedly mounted symmetrically on the base plate, a mounting rod is fixedly mounted between the first and second mounting plates, and the mounting rod has a rectangular cross-section. A limiting cylinder is fixedly mounted on the back of the guide groove, and the limiting cylinder is sleeved on the mounting rod. The guide groove is movably mounted on the mounting rod via the limiting cylinder. With this structural design, the guide groove can slide along the mounting rod via the limiting cylinder. After drying is completed, it can be pushed below the first housing to facilitate material collection.

[0012] It is further defined that the upper end of the upper plate is fixedly mounted with a top plate, a rotating shaft is fixedly mounted on the top plate, and the top plate is rotatably mounted between the first mounting plate and the second mounting plate via the rotating shaft. The rotating shaft passes through one end of the first mounting plate and is fixedly mounted with a positioning disk, which has two slots. The first mounting plate is fixedly mounted with a fixed protrusion and a limit frame, and the fixed protrusion is fixedly mounted with a return spring. The upper end of the return spring is fixedly mounted with an L-shaped insert that matches the slot, and the upper end of the L-shaped insert is movably mounted within the limit frame. With this structural design, the positioning disk and the L-shaped insert can lock the top plate and the upper plate at a set angle, making it easy to take and place materials.

[0013] It is further defined that a compression spring is sleeved between the limiting cylinder and the first mounting plate on the mounting rod, a rack is fixedly mounted on the back of the limiting cylinder, a gear meshing with the rack is rotatably mounted on the second fixing rod, a fixing plate and a friction plate are provided on both sides of the gear on the second fixing rod, the fixing plate is fixedly mounted on the second fixing rod, a pressure plate is rotatably mounted on the side of the friction plate away from the gear, the second fixing rod passes through the pressure plate, a force block and a plug are fixedly mounted on the side of the pressure plate away from the friction plate, the end of the plug passes through the rear fixing plate, and a tension spring is sleeved on the plug between the pressure plate and the rear fixing plate. This structural design is simple and easy to use.

[0014] Further defined, a transfer rod is fixedly mounted between the first and second mounting plates, and a toggle lever is rotatably mounted on the transfer rod. When the top plate rotates upward, the ends of the toggle lever contact the top plate and the force-bearing block, respectively. With this structural design, the top plate can apply force to the toggle lever, causing it to rotate around the transfer rod, thereby pushing the force-bearing block to move, changing the connection between the gear and the second fixed rod.

[0015] The invention adopting the above technical solution has the following advantages:

[0016] 1. The present invention forms a storage chamber by enclosing a first shell and a second shell to store materials. During the heating process, the driving motor can drive the first shell and the second shell to rotate periodically through the first fixing rod, so that the materials pass through the through holes of the partition plate multiple times. When the materials move from the first shell to the second shell or from the second shell to the first shell, the materials located in the center of the storage chamber will fall to the edge of the storage chamber, which can reduce the probability of the edge materials being overheated and make the materials heated more evenly.

[0017] 2. In the present invention, when the top plate is rotated, the top plate will drive the toggle rod to move, thereby pushing the pressure plate through the force block, so that the friction plate and the gear are close to each other until the friction plate and the fixed plate clamp the gear. At this time, the gear will rotate together with the second fixed rod. When the first shell rotates, the gear drives the guide groove to move to the bottom of the first shell through the rack, which is convenient for collecting the dried materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0019] Figure 1 This is a structural schematic diagram of a radio frequency heating drying device of the present invention;

[0020] Figure 2 This is a structural schematic diagram of a radio frequency heating drying device according to the present invention from another angle;

[0021] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 5 This is a schematic structural diagram of a storage mechanism in a radio frequency heating drying device of the present invention;

[0024] Figure 6 This is a schematic cross-sectional view of a storage mechanism in a radio frequency heating drying device according to the present invention;

[0025] Figure 7 This is a schematic structural diagram of the gear portion of a radio frequency heating drying device of the present invention;

[0026] Figure 8 This is a schematic structural diagram of the guide groove portion of a radio frequency heating drying device of the present invention.

[0027] The main component symbols are described as follows:

[0028] 1. Substrate; 11. Upper plate; 12. Lower plate;

[0029] 13. Front fixing plate; 131. Drive motor;

[0030] 14. Rear fixing plate;

[0031] 2. Depository institution;

[0032] 21. First housing; 211. First fixing rod; 212. Second fixing rod; 2121. Fixing plate; 213. Positioning slot;

[0033] 22. Second housing; 23. Clamping column; 24. Rotating end;

[0034] 3. Separator; 31. Positioning block;

[0035] 4. Collection box;

[0036] 5. Guide groove; 51. Limiting cylinder; 52. Rack;

[0037] 53, gear; 531, friction disc; 532, pressure plate; 533, force block; 534, plug post; 535, tension spring;

[0038] 6. First mounting plate; 61. Second mounting plate; 62. Mounting rod; 63. Compression spring;

[0039] 7. Top plate; 71. Rotating shaft; 72. Positioning plate;

[0040] 8. Fixed protrusion; 81. Limit frame; 82. Return spring; 83. L-shaped insert;

[0041] 9. Adapter rod; 91. Toggle rod. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts are numbered the same. Implementations not shown or described in the drawings are forms known to those of ordinary skill in the art. In addition, directional terms mentioned in the embodiments, such as "upper," "lower," "top," "bottom," "left," "right," "front," and "back," are merely references to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0043] like Figures 1 to 8As shown, a radio frequency heating drying device of the present invention includes a substrate 1, a radio frequency heating system and a storage mechanism 2 for placing materials, an upper plate 11 and a lower plate 12 are provided on the substrate 1, the upper plate 11 and the lower plate 12 are made of aluminum alloy and the surface is silver-plated, the radio frequency heating system is connected to the upper plate 11 and the lower plate 12, the storage mechanism 2 is located between the upper plate 11 and the lower plate 12, the storage mechanism 2 includes a first shell 21 and a second shell 22, the first shell 21 and the second shell 22 are made of polytetrafluoroethylene, the first shell 21 and the second shell 22 are enclosed to form a storage cavity, the lower end of the second shell 22 is fixedly installed with a card column 23, the first shell 21 is provided with a card groove adapted to the card column 23, a partition plate 3 is provided between the first shell 21 and the second shell 22, the partition plate 3 divides the storage cavity into two parts, the upper and lower parts, the edge of the partition plate 3 is provided with an elastic sealing ring to ensure that it is in contact with the first shell The sealing between the body 21 and the second shell 22, the upper and lower ends of the partition plate 3 are provided with a conical groove, and the center of the conical groove is provided with a through hole. The conical groove can make the material smoothly gather to the through hole under the action of gravity. The front and rear ends of the first shell 21 are symmetrically fixed with a first fixing rod 211 and a second fixing rod 212. The front fixing plate 13 and the rear fixing plate 14 are fixedly installed on the base plate 1. The front fixing plate 13 and the rear fixing plate 14 are respectively provided with adapter holes adapted to the first fixing rod 211 and the second fixing rod 212. The front fixing plate 13 is fixedly installed with a drive motor 131 with an output shaft fixedly connected to the first fixing rod 211. The drive motor 131 is used in conjunction with the controller. When the heating and drying device is working, the controller can control the drive motor 131 to rotate periodically. One cycle of rotation will drive the first shell 21 and the second shell 22 to flip clockwise one hundred and eighty degrees through the first fixing rod 211.

[0044] The partition plate 3 located in the storage cavity is disc-shaped, and a positioning block 31 is fixedly installed on the side of the partition plate 3. A positioning groove 213 adapted to the positioning block 31 is opened on the first shell 21. The positioning block 31 and the positioning groove 213 facilitate the placement of the partition plate 3 so that the partition plate 3 is located at the set position.

[0045] The first shell 21 and the second shell 22 are both hemispherical, and air vents are provided at the bottom of the first shell 21 and the top of the second shell 22. A support rod is fixedly mounted on the substrate 1, and an air guide cover is fixedly mounted on the support rod. A fan is arranged in the air guide cover, and the air outlet of the air guide cover faces the top of the storage mechanism 2. When the fan is working, it will guide the air to flow to the top of the storage mechanism 2, so that the air flow rate above the air vent is accelerated and the pressure is reduced, which can quickly remove the moisture in the first shell 21 and the second shell 22, thereby improving the exhaust effect at the air vent. A degassing component is provided in the air vent, and the degassing component includes two rotating ends 24 and a torsion spring. The two rotating ends 24 are respectively movably mounted in the air vents of the first shell 21 and the second shell 22. The two rotating ends 24 are respectively rotatably mounted on the inner walls of the first shell 21 and the second shell 22 through a rotating shaft, and the torsion spring is arranged at the connection of the rotating shaft.

[0046] A collecting box 4 for holding materials is movably mounted on the base plate 1, and a guide groove 5 for use therewith is provided above the collecting box 4. A first mounting plate 6 and a second mounting plate 61 are fixedly mounted symmetrically on the base plate 1, and a mounting rod 62 is fixedly mounted between the first mounting plate 6 and the second mounting plate 61. The cross-section of the mounting rod 62 is rectangular, and a limiting cylinder 51 is fixedly mounted on the back of the guide groove 5. The limiting cylinder 51 is sleeved on the mounting rod 62, and the guide groove 5 is movably mounted on the mounting rod 62 through the limiting cylinder 51.

[0047] The upper end of the upper pole plate 11 is fixedly mounted with a top plate 7, and a rotating shaft 71 is fixedly mounted on the top plate 7. The top plate 7 is rotatably mounted between the first mounting plate 6 and the second mounting plate 61 through the rotating shaft 71. The rotating shaft 71 passes through one end of the first mounting plate 6 and is fixedly mounted with a positioning plate 72. The positioning plate 72 has two slots. A fixed protrusion 8 and a limit frame 81 are fixedly mounted on the first mounting plate 6. A return spring 82 is fixedly mounted on the fixed protrusion 8. The upper end of the return spring 82 is fixedly mounted with an L-shaped insert 83 that is compatible with the slot. The upper end of the L-shaped insert 83 is movably mounted in the limit frame 81. The L-shaped insert 83 can cooperate with the positioning plate 72 to lock the top plate 7 at a horizontal or vertical angle.

[0048] A compression spring 63 is sleeved on the mounting rod 62 between the limiting cylinder 51 and the first mounting plate 6, and a rack 52 is fixedly installed on the back of the limiting cylinder 51, and a gear 53 meshing with the rack 52 is rotatably installed on the second fixing rod 212. A fixed disk 2121 and a friction disk 531 are provided on both sides of the gear 53 on the second fixing rod 212, and the fixed disk 2121 is fixedly installed on the second fixing rod 212. A pressure plate 532 is rotatably installed on the side of the friction disk 531 away from the gear 53, and the second fixing rod 212 passes through the pressure plate 532. A force block 533 and a plug column 534 are fixedly installed on the side of the pressure plate 532 away from the friction disk 531. The end of the plug column 534 passes through the rear fixing plate 14, and a tension spring 535 is sleeved on the plug column 534 between the pressure plate 532 and the rear fixing plate 14.

[0049] A transfer rod 9 is fixedly installed between the first mounting plate 6 and the second mounting plate 61 . A toggle rod 91 is rotatably installed on the transfer rod 9 . When the top plate 7 rotates upward, two ends of the toggle rod 91 contact the top plate 7 and the force block 533 respectively.

[0050] The method of use of the present invention is as follows:

[0051] When in use, the top plate 7 is rotated to rotate the top plate 7 and the upper electrode plate 11. The L-shaped insert 83 cooperates with the positioning plate 72 to lock the top plate 7 at a set angle. The material is poured into the first shell 21, and then the partition plate 3 and the second shell 22 are successively assembled with the first shell 21.

[0052] After completing the above steps, press the L-shaped insert 83 downward to rotate the top plate 7 and the upper electrode plate 11 to a horizontal state. The L-shaped insert 83 is again inserted into the slot of the positioning plate 72 to lock the position of the top plate 7. At this time, the RF heating system is working and the material in the first shell 21 is heated.

[0053] During the heating process, the drive motor 131 works periodically, driving the first shell 21 and the second shell 22 to perform periodic flipping movements. When the first shell 21 rotates upward, the material in the first shell 21 falls into the second shell 22 through the through hole in the center of the partition plate 3. The material in the center of the storage chamber moves to the edge of the storage chamber, so that the material can be heated more evenly.

[0054] After heating is completed, the first housing 21 is controlled to be located at the bottom, and the top plate 7 is rotated again. The position of the top plate 7 is locked by the L-shaped insert 83 and the positioning plate 72. The top plate 7 applies force to the toggle rod 91, and the toggle rod 91 pushes the pressure plate 532 and the friction plate 531 toward the gear 53 through the force block 533 until the friction plate 531 and the fixed plate 2121 clamp the gear 53, and the gear 53 can rotate with the second fixed rod 212.

[0055] When taking out the dried material, the second shell 22 and the partition plate 3 are separated from the first shell 21, the drive motor 131 is turned on, the first shell 21 rotates, the second fixed rod 212 and the gear 53 drive the rack 52 to move, and the guide groove 5 moves along the mounting rod 62 to the bottom of the first shell 21, so that the material falling from the first shell 21 can be guided into the collection box 4, so as to facilitate the collection of the material.

[0056] The above describes in detail the radio frequency heating drying device provided by the present invention. The description of the specific embodiments is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the claims.

Claims

1. A radio frequency heating drying device, comprising a substrate (1), a radio frequency heating system, and a storage mechanism (2) for placing materials, wherein the substrate (1) is provided with an upper plate (11) and a lower plate (12), the radio frequency heating system is connected to the upper plate (11) and the lower plate (12), and the storage mechanism (2) is located between the upper plate (11) and the lower plate (12), characterized in that: The storage mechanism (2) comprises a first shell (21) and a second shell (22), the first shell (21) and the second shell (22) enclose a storage cavity, a clamping column (23) is fixedly mounted on the lower end of the second shell (22), a clamping groove adapted to the clamping column (23) is provided on the first shell (21), a partition plate (3) is provided between the first shell (21) and the second shell (22), the partition plate (3) divides the storage cavity into upper and lower parts, the upper and lower ends of the partition plate (3) are both provided with a conical groove, the conical groove A through hole is provided at the center, a first fixing rod (211) and a second fixing rod (212) are symmetrically fixedly installed at the front and rear ends of the first shell (21), a front fixing plate (13) and a rear fixing plate (14) are fixedly installed on the base plate (1), and adapter holes adapted to the first fixing rod (211) and the second fixing rod (212) are respectively provided on the front fixing plate (13) and the rear fixing plate (14), and a driving motor (131) whose output shaft is fixedly connected to the first fixing rod (211) is fixedly installed on the front fixing plate (13).

2. The radio frequency heating drying device according to claim 1, characterized in that: The first shell (21) and the second shell (22) are both hemispherical, and the bottom of the first shell (21) and the top of the second shell (22) are both provided with air vents, and an air release component is provided in the air vents. A support rod is fixedly mounted on the base plate (1), and a shroud is fixedly mounted on the support rod. A fan is provided in the shroud, and an air outlet of the shroud faces the top of the storage mechanism (2).

3. The radio frequency heating drying device according to claim 1, characterized in that: The partition plate (3) located in the storage cavity is disc-shaped, a positioning block (31) is fixedly mounted on the side of the partition plate (3), and a positioning groove (213) adapted to the positioning block (31) is provided on the first shell (21).

4. The radio frequency heating drying device according to claim 2, characterized in that: The degassing assembly comprises two rotating ends (24) and a torsion spring. The two rotating ends (24) are movably mounted in the air vents of the first shell (21) and the second shell (22), respectively. The two rotating ends (24) are rotatably mounted on the inner walls of the first shell (21) and the second shell (22) via rotating shafts, respectively. The torsion spring is arranged at the connection of the rotating shafts.

5. The radio frequency heating drying device according to claim 1, characterized in that: A collecting box (4) for holding materials is movably mounted on the base plate (1), and a guide groove (5) for use with the collecting box (4) is provided above the collecting box (4).

6. The radio frequency heating drying device according to claim 5, characterized in that: A first mounting plate (6) and a second mounting plate (61) are fixedly mounted on the base plate (1) in a symmetrical manner. A mounting rod (62) is fixedly mounted between the first mounting plate (6) and the second mounting plate (61). The cross section of the mounting rod (62) is rectangular. A limiting cylinder (51) is fixedly mounted on the back of the guide groove (5). The limiting cylinder (51) is sleeved on the mounting rod (62). The guide groove (5) is movably mounted on the mounting rod (62) through the limiting cylinder (51).

7. The radio frequency heating drying device according to claim 6, characterized in that: A top plate (7) is fixedly mounted on the upper end of the upper electrode plate (11), a rotating shaft (71) is fixedly mounted on the top plate (7), and the top plate (7) is rotatably mounted between the first mounting plate (6) and the second mounting plate (61) via the rotating shaft (71). The rotating shaft (71) passes through one end of the first mounting plate (6) and is fixedly mounted with a positioning plate (72). Two slots are provided on the positioning plate (72). A fixing protrusion (8) and a limit frame (81) are fixedly mounted on the first mounting plate (6). A return spring (82) is fixedly mounted on the fixing protrusion (8). An L-shaped insert (83) adapted to the slot is fixedly mounted on the upper end of the return spring (82), and the upper end of the L-shaped insert (83) is movably mounted in the limit frame (81).

8. The radio frequency heating drying device according to claim 7, characterized in that: A compression spring (63) is sleeved on the mounting rod (62) between the limiting cylinder (51) and the first mounting plate (6); a rack (52) is fixedly mounted on the back of the limiting cylinder (51); a gear (53) meshing with the rack (52) is rotatably mounted on the second fixing rod (212); a fixing plate (2121) and a friction plate (531) are provided on both sides of the gear (53) on the second fixing rod (212); the fixing plate (2121) is fixedly mounted on the second fixing rod (212); 2), a pressure plate (532) is rotatably mounted on the side of the friction disc (531) away from the gear (53), the second fixing rod (212) passes through the pressure plate (532), a force block (533) and a plug post (534) are fixedly mounted on the side of the pressure plate (532) away from the friction disc (531), the end of the plug post (534) passes through the rear fixing plate (14), and a tension spring (535) is sleeved on the plug post (534) between the pressure plate (532) and the rear fixing plate (14).

9. The radio frequency heating drying device according to claim 8, characterized in that: A transfer rod (9) is fixedly installed between the first mounting plate (6) and the second mounting plate (61), and a toggle rod (91) is rotatably installed on the transfer rod (9). When the top plate (7) rotates upward, the two ends of the toggle rod (91) contact the top plate (7) and the force block (533) respectively.

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