High-power microwave source shell structure

Abstract

The utility model discloses a high-power microwave source shell structure which comprises a shell, the shell is of a cylindrical structure, a microwave drying device is fixedly installed in the shell, a convex plate is arranged on the inner wall of the shell, a concave-convex structure is formed between the convex plate and the inner wall of the shell, a conveying device is arranged in the shell, and the conveying device is connected with the microwave drying device. A feeding port is formed in the top end of the shell, and a discharging port is formed in the bottom end of the shell. By arranging the cylindrical shell structure, the reflection path of microwaves in the shell can be more complex, energy dead angles are reduced, energy is evenly distributed, due to the fact that the microwaves are prone to forming mirror reflection on the smooth surface, obvious standing waves are caused, energy distribution is uneven, mirror reflection can be damaged due to the arrangement of the convex plates, and therefore the energy distribution efficiency is improved. And the microwaves are scattered towards different directions to form diffuse reflection, so that the propagation paths of the microwaves in the shell are more and more complicated, and the energy distribution is more uniform after multiple times of diffuse reflection.

Description

Technical Field

[0001] This utility model relates to the field of high-power microwave source technology, and in particular to a high-power microwave source housing structure. Background Technology

[0002] Microwave drying equipment is widely used in the drying of Chinese medicinal herbs. It is mainly used for blanching flower and leafy medicinal herbs and for drying, sterilizing, and killing insects in various processed medicinal herbs. Processed medicinal herbs can have their moisture content reduced to 3% or even lower, and their aroma is stronger than ordinary dried products, making them suitable for direct consumption with a better taste. Microwave equipment can also be used for drying and sterilizing bottled pharmaceutical liquids such as pharmaceutical raw materials, Chinese and Western medicines, and nutritional oral liquids.

[0003] A search revealed a Chinese utility model patent (CN213020826U) for a microwave drying device for traditional Chinese medicinal materials. The device includes a housing; an electric conveyor belt is horizontally installed at the lower end of the housing's interior; a funnel-shaped feed trough extends through the middle of the right side of the upper surface of the housing; a fixing frame is horizontally fixed to the middle of the inner wall of the feed trough; and a filter screen is horizontally installed above the fixing frame. By controlling the electric conveyor belt, the medicinal materials are transported directly below the microwave drying device for drying. After drying, the materials are discharged through the discharge port into a collection box for storage. The device has a simple structure and good drying effect.

[0004] However, when microwaves propagate inside the cavity, standing waves are formed due to the matching relationship between the wavelength and the cavity. The standing waves cause the electric field to be enhanced at the peak, thus forming hot spots. At the nodes, they cancel each other out, forming cold spots. This results in uneven distribution of microwave heat, making it impossible to dry Chinese medicinal materials evenly. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-power microwave source housing structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-power microwave source housing structure includes a cylindrical housing. A microwave drying device is fixedly installed inside the housing. A convex plate is provided on the inner wall of the housing, forming a concave-convex structure with the convex plate. A conveying device is provided inside the housing. An inlet is provided at the top of the housing, and an outlet is provided at the bottom. The cylindrical housing structure allows for a more complex microwave reflection path inside the housing. Standing waves from different directions superimpose and cover a wider area, reducing energy dead zones and thus distributing energy more evenly. Since microwaves easily form specular reflections on smooth surfaces, resulting in significant standing waves and uneven energy distribution, the convex plate disrupts specular reflection, causing microwaves to scatter in different directions, thus forming diffuse reflection. This results in more and more complex microwave propagation paths within the housing, leading to a more uniform energy distribution after multiple diffuse reflections, thereby ensuring more even drying of the medicinal herbs.

[0008] Furthermore, the conveying device is equipped with a rotating assembly and a belt. The rotating assembly includes a slide rod fixedly mounted on the belt, a mounting plate fixedly mounted on the slide rod, a motor fixedly mounted on the upper surface of the mounting plate, a connecting seat fixedly mounted on the upper surface of the mounting plate, a worm gear fixedly mounted at the output end of the motor, the worm gear being rotatably connected to the connecting seat, a rotating rod fixedly mounted at the center of the upper surface of the mounting plate, a worm wheel fixedly mounted on the rotating rod, the worm wheel being meshed with the worm gear, and a drying tray fixedly mounted at the top of the rotating rod. The medicinal herbs can dynamically receive microwave irradiation from different directions, thereby further improving the uniformity of heating.

[0009] Furthermore, the housing is made of aluminum, a material with high microwave reflectivity (reflectivity > 90%), which allows for precise control of the microwave path.

[0010] Furthermore, the inner edges of the housing are chamfered to reduce dead angles of reflection.

[0011] Furthermore, blades are fixedly installed on the outside of the drying tray, and the blades are arranged in an outward radial pattern; the rotation of the blades dynamically disturbs the standing wave, making the standing wave unstable and thus improving the uniformity of heating of the Chinese medicinal materials.

[0012] Furthermore, the conveying device is provided with a side plate, and a sliding groove is provided on the side plate, and the sliding rod is slidably installed inside the sliding groove.

[0013] Furthermore, a support frame is fixedly installed on the lower surface of the shell, and a collection box is provided below the discharge port.

[0014] Furthermore, the inner wall of the housing is coated with a microwave absorbing coating, which is a silicon carbide composite material. The microwave absorbing coating can partially absorb redundant microwave energy and reduce the standing waves formed by reflection. By adjusting the coating thickness, the absorption and reflection ratio can be balanced, making the microwave field distribution more uniform.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model, by setting up a shell and a convex plate, and a cylindrical shell structure, makes the microwave reflection path inside the shell more complex. After the standing waves in different directions are superimposed, they cover more areas, reduce energy dead zones, and thus distribute energy evenly. Since microwaves are prone to specular reflection on smooth surfaces, resulting in obvious standing waves and uneven energy distribution, the setting of the convex plate will destroy specular reflection, causing microwaves to scatter in different directions, thus forming diffuse reflection. In this way, the propagation path of microwaves inside the shell is more numerous and more complex. After multiple diffuse reflections, the energy distribution is more even, thus making the drying of Chinese medicinal materials more uniform.

[0017] 2. By setting up a rotating component, when the Chinese medicinal materials fall onto the drying tray, the motor drives the worm gear to rotate, and the worm gear drives the worm wheel and the drying tray to rotate. Therefore, the Chinese medicinal materials can dynamically receive microwave irradiation from different directions, thereby further improving the uniformity of heating. When the drying tray rotates, it drives the blades to rotate. The rotation of the blades dynamically disturbs the standing waves, making the standing waves unstable, thereby improving the uniformity of heating of the Chinese medicinal materials.

[0018] 3. This utility model incorporates a microwave absorbing coating, which partially absorbs redundant microwave energy, reducing standing waves formed by reflection. By adjusting the coating thickness, the absorption and reflection ratio can be balanced, resulting in a more uniform microwave field distribution. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of a high-power microwave source housing structure proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of a high-power microwave source housing structure conveying device proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of a rotating component of a high-power microwave source housing structure proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of a convex plate structure for a high-power microwave source housing structure proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the microwave absorbing coating of a high-power microwave source housing structure proposed in this utility model.

[0024] In the diagram: 1. Shell; 2. Microwave drying equipment; 3. Convex plate; 4. Conveying device; 5. Inlet; 6. Outlet; 7. Belt; 8. Slide rod; 9. Mounting plate; 10. Motor; 11. Connecting seat; 12. Worm gear; 13. Rotating rod; 14. Worm wheel; 15. Drying tray; 16. Blade; 17. Side plate; 18. Slide groove; 19. Support frame; 20. Collection box; 21. Microwave absorbing coating. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1 , Figure 4 A high-power microwave source housing structure includes a housing 1, which is cylindrical. A microwave drying device 2 is fixedly installed inside the housing 1. A convex plate 3 is provided on the inner wall of the housing 1, forming a concave-convex structure with the convex plate 3. A conveying device 4 is provided inside the housing 1. A feed inlet 5 is provided at the top of the housing 1, and a discharge outlet 6 is provided at the bottom of the housing 1. Traditional Chinese medicine materials enter the housing 1 through the feed inlet 5 and then fall onto a drying tray 15, where the microwave drying device 2 dries the materials. Thanks to the cylindrical shape... The shell 1 structure makes the microwave reflection path inside the shell 1 more complex. The standing waves in different directions are superimposed and cover more areas, reducing energy dead zones and thus distributing energy evenly. Since microwaves are prone to specular reflection on smooth surfaces, resulting in obvious standing waves and uneven energy distribution, the setting of the convex plate 3 will destroy specular reflection, causing microwaves to scatter in different directions, thus forming diffuse reflection. In this way, the microwave propagation path inside the shell 1 is more numerous and more complex. After multiple diffuse reflections, the energy distribution is also more uniform, thus making the drying of Chinese medicinal materials more uniform.

[0027] Reference Figure 1-3Specifically: the conveying device 4 is equipped with a rotating component and a belt 7. The rotating component includes a slide rod 8 fixedly mounted on the belt 7, an mounting plate 9 fixedly mounted on the slide rod 8, a motor 10 fixedly mounted on the upper surface of the mounting plate 9, a connecting seat 11 fixedly mounted on the upper surface of the mounting plate 9, a worm gear 12 fixedly mounted at the output end of the motor 10, the worm gear 12 being rotatably connected to the connecting seat 11, a rotating rod 13 fixedly mounted at the center of the upper surface of the mounting plate 9, a worm wheel 14 fixedly mounted on the rotating rod 13, the worm wheel 14 being meshed with the worm gear 12, and a drying tray 15 fixedly mounted at the top of the rotating rod 13. When the medicinal materials fall onto the drying tray 15, the motor 10 drives the worm gear 12 to rotate, and the worm gear 12 drives the worm wheel 14 and the drying tray 15 to rotate. Therefore, the medicinal materials can dynamically receive microwave irradiation from different directions, thereby further improving the uniformity of heating.

[0028] Specifically: The housing 1 is made of aluminum, which is a high microwave reflectivity material (reflectivity > 90%), and can precisely control the microwave path.

[0029] Reference Figure 1 Specifically: the inner edge of the housing 1 is chamfered to reduce dead angles of reflection.

[0030] Reference Figure 3 Specifically: blades 16 are fixedly installed on the outer side of the drying tray 15, and the blades 16 are radially outward; when the drying tray 15 rotates, it drives the blades 16 to rotate, and the rotation of the blades 16 dynamically disturbs the standing wave, making the standing wave unstable, thereby improving the uniformity of heating of Chinese medicinal materials.

[0031] Reference Figure 2 Specifically: the conveying device 4 is provided with a side plate 17, the side plate 17 is provided with a sliding groove 18, and the sliding rod 8 is slidably installed inside the sliding groove 18.

[0032] Reference Figure 1 Specifically: a support frame 19 is fixedly installed on the lower surface of the housing 1, and a collection box 20 is provided below the discharge port 6.

[0033] Reference Figure 5 Specifically: the inner wall of the housing 1 is coated with a microwave absorbing coating 21, which is a silicon carbide composite material; the microwave absorbing coating 21 can partially absorb redundant microwave energy and reduce the standing waves formed by reflection. By adjusting the coating thickness, the absorption and reflection ratio can be balanced, making the microwave field distribution more uniform.

[0034] Working principle: Chinese medicinal materials enter the shell 1 through the feed inlet 5 and then fall onto the drying tray 15. The microwave drying equipment 2 dries the Chinese medicinal materials, and finally they fall into the collection box 20 for collection under the conveying device 4.

[0035] Thanks to the cylindrical shell 1 structure, the microwave reflection path inside the shell 1 is more complex. The standing waves in different directions are superimposed and cover more areas, reducing energy dead zones and thus distributing energy evenly. Since microwaves are prone to specular reflection on smooth surfaces, resulting in obvious standing waves and uneven energy distribution, the convex plate 3 will destroy specular reflection and cause microwaves to scatter in different directions, thus forming diffuse reflection. In this way, the microwave propagation path inside the shell 1 is more numerous and more complex. After multiple diffuse reflections, the energy distribution is also more uniform, thus making the drying of Chinese medicinal materials more uniform.

[0036] When the Chinese medicinal materials fall onto the drying tray 15, the motor 10 drives the worm gear 12 to rotate, and the worm gear 12 drives the worm wheel 14 and the drying tray 15 to rotate. Therefore, the Chinese medicinal materials can dynamically receive microwave irradiation from different directions, thereby further improving the uniformity of heating. When the drying tray 15 rotates, it drives the blades 16 to rotate. The rotation of the blades 16 dynamically disturbs the standing waves, making the standing waves unstable, thereby improving the uniformity of heating of the Chinese medicinal materials.

[0037] The microwave absorbing coating 21 can partially absorb redundant microwave energy and reduce the standing waves formed by reflection. By adjusting the coating thickness, the absorption and reflection ratio can be balanced, making the microwave field distribution more uniform.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0039] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

Claims

1. A high-power microwave source housing structure, characterized in that, Includes a housing (1), which is a cylindrical structure. A microwave drying device (2) is fixedly installed inside the housing (1). A convex plate (3) is provided on the inner wall of the housing (1). A concave-convex structure is formed between the convex plate (3) and the inner wall of the housing (1). A conveying device (4) is provided inside the housing (1). A feed inlet (5) is provided at the top of the housing (1). A discharge outlet (6) is provided at the bottom of the housing (1).

2. The high-power microwave source housing structure according to claim 1, characterized in that, The conveying device (4) is provided with a rotating component and a belt (7). The rotating component includes a slide rod (8) fixedly installed on the belt (7). A mounting plate (9) is fixedly installed on the slide rod (8). A motor (10) is fixedly installed on the upper surface of the mounting plate (9). A connecting seat (11) is fixedly installed on the upper surface of the mounting plate (9). A worm gear (12) is fixedly installed at the output end of the motor (10). The worm gear (12) is rotatably connected to the connecting seat (11). A rotating rod (13) is fixedly installed at the center of the upper surface of the mounting plate (9). A worm wheel (14) is fixedly installed on the rotating rod (13). The worm wheel (14) is meshed with the worm gear (12). A drying tray (15) is fixedly installed at the top of the rotating rod (13).

3. The high-power microwave source housing structure according to claim 1, characterized in that, The housing (1) is made of aluminum.

4. The high-power microwave source housing structure according to claim 1, characterized in that, The inner edge of the shell (1) is chamfered.

5. The high-power microwave source housing structure according to claim 2, characterized in that, The drying tray (15) is fixedly equipped with blades (16) on the outside, and the blades (16) are radially outward.

6. The high-power microwave source housing structure according to claim 2, characterized in that, The conveying device (4) is provided with a side plate (17), and a groove (18) is provided on the side plate (17). The slide rod (8) is slidably installed inside the groove (18).

7. The high-power microwave source housing structure according to claim 1, characterized in that, A support frame (19) is fixedly installed on the lower surface of the housing (1), and a collection box (20) is provided below the discharge port (6).

8. The high-power microwave source housing structure according to claim 1, characterized in that, The inner wall of the housing (1) is coated with a microwave absorbing coating (21), which is a silicon carbide composite material.

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