A pepper drying device

Abstract

The present application belongs to the technical field of drying equipment, and particularly relates to a chili drying device, which comprises a heat preservation box, a mesh cage is horizontally rotationally connected to the inner wall of one side of the heat preservation box, an anti-accumulation assembly is arranged on the inner wall of the mesh cage, the anti-accumulation assembly is used for preventing chilies from accumulating at the bottom of the mesh cage, the mesh cage is drivingly matched with a first driving assembly, a first air blowing and drying assembly is coaxially rotationally connected to the mesh cage, and the first air blowing and drying assembly is drivingly matched with a second driving assembly; a second air blowing and drying assembly is arranged above the mesh cage, and the first air blowing and drying assembly and the second air blowing and drying assembly are both connected with a hot air source; a feeding hopper is arranged on one side of the heat preservation box and communicates with one end of the mesh cage, and a discharging port is arranged on the other side of the heat preservation box and communicates with the other end of the mesh cage. In the drying process, the present application effectively prevents chilies from accumulating, blows hot air to the chilies from different directions for drying, and is beneficial to improving the drying efficiency and quality.

Description

Technical Field

[0001] This invention belongs to the field of drying equipment technology, and particularly relates to a chili drying device. Background Technology

[0002] Chili peppers are an important condiment and economic crop in my country. Freshly harvested chili peppers need to be dehydrated and dried for long-term storage and transportation.

[0003] In existing drying equipment, chili peppers tend to pile up during the drying process, resulting in uneven heating, difficulty in evenly dissipating moisture, low drying efficiency and poor results, and even causing some chili peppers to scorch due to excessively high local temperatures.

[0004] Therefore, a device is needed that can prevent chili peppers from piling up and improve drying uniformity and efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a chili drying device to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides a chili drying device, including an insulated box. A wire mesh cage is laterally rotatably connected to one inner wall of the insulated box. An anti-accumulation component is provided on the inner wall of the wire mesh cage to prevent chilies from accumulating at the bottom of the wire mesh cage. The wire mesh cage is driven by a first drive component. A first air-blowing drying component is coaxially rotatably connected inside the wire mesh cage. The first air-blowing drying component is driven by a second drive component. A second air-blowing drying component is provided above the wire mesh cage. Both the first and second air-blowing drying components are connected to a hot air source. A feeding hopper is provided on one side of the insulated box and communicates with one end of the wire mesh cage. A discharge port is provided on the other side of the insulated box and communicates with the other end of the wire mesh cage.

[0007] Preferably, the insulated box includes a box body, and an insulation layer is provided on the inner wall of the box body.

[0008] Preferably, the first air-blowing drying assembly includes a rotating shaft rotatably connected to the opposite side wall of the housing. The rotating shaft is a tubular structure and is coaxially arranged with the mesh cage. One end of the rotating shaft is connected to the hot air source, and the other end of the rotating shaft is in transmission cooperation with the second drive assembly. Multiple connecting pipes are circumferentially connected to the rotating shaft. The end of each connecting pipe is connected to an air jet pipe. The air jet pipe is arranged along the axial direction of the mesh cage and has multiple air jet holes.

[0009] Preferably, the second drive assembly includes a drive motor, the output shaft of which is connected to a drive pulley, one end of which passes through the side wall of the housing and is connected to a driven pulley, and the drive pulley is driven by the driven pulley via a belt.

[0010] Preferably, the second air-blowing drying assembly includes an air duct connected between the opposite side walls of the housing, with multiple air blowers evenly spaced on the air duct, the multiple air blowers located above the mesh cage, and one end of the air duct penetrating through the side wall of the housing and communicating with the hot air source.

[0011] Preferably, the blower includes a jet head that communicates with the air duct, and a shroud is mounted on the jet head.

[0012] Preferably, a heat-conducting cylinder is coaxially sleeved on the wire mesh cage, and there is a gap between the heat-conducting cylinder and the wire mesh cage. A heating component is provided on the heat-conducting cylinder.

[0013] Preferably, the heating assembly includes a plurality of electric heating rods arranged at equal intervals along the circumference of the outer wall of the heat-conducting cylinder, and the plurality of electric heating rods are electrically connected to a temperature controller.

[0014] Preferably, the anti-accumulation component includes multiple baffles and multiple guide plates. The baffles are L-shaped and are arranged circumferentially along the inner wall of the wire mesh cage. The guide plates are arranged at one end of the wire mesh cage near the discharge port and are wedge-shaped.

[0015] Preferably, the first drive assembly includes a motor mounted on the insulation box, the output shaft of the motor passing through the side wall of the insulation box and connected to a gear, and an external gear ring fixedly sleeved on the outer wall of the mesh cage, the external gear ring meshing with the gear.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: This invention, through the rotation of the mesh cage and the design of the internal anti-piling components, continuously turns and scatters the chili peppers, avoiding localized accumulation. Combined with the multi-directional hot air blowing from inside and outside, top and bottom, the chili peppers are heated and dehydrated evenly, greatly improving drying efficiency and uniformity.

[0017] By incorporating anti-accumulation components that scoop, carry, and scatter the chilies during the rotation of the mesh cage, the problem of chilies easily piling up at the bottom during the drying process is effectively solved.

[0018] The feeding, turning, drying and discharging processes of this invention are continuous, enabling continuous or batch operations and reducing labor intensity.

[0019] The first air-blowing drying component rotates and blows air inside the mesh cage, while the second air-blowing drying component is fixed above and blows air. The combination of internal and external components results in a compact structure, complete functions, and efficient drying. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of a chili drying device proposed in this invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the anti-accumulation component and the first blowing and drying component in this invention; The components are as follows: 1. Box body; 2. Discharge port; 3. Rotating shaft; 4. Wire mesh cage; 5. Air duct; 6. Insulation layer; 7. Electric heating rod; 8. Feed hopper; 9. Baffle; 10. Second drive assembly; 11. Connecting pipe; 12. Jet pipe; 13. External gear ring; 14. Gear; 15. Motor; 16. Jet nozzle; 17. Air hood; 18. Hot air blower; 19. Guide plate; 20. Heat conduction cylinder. Detailed Implementation

[0021] 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.

[0022] The hot air blower in the embodiment is described below: A hot air blower is a device that emits hot air and is widely used in many fields such as industry, agriculture, commerce, and daily life. The following is a detailed introduction from both basic and extended functions: Hot air blowers convert electrical energy into heat energy using internal heating elements, such as electric heating tubes or ceramic heating plates, to heat the air. Simultaneously, the blower continuously draws in outside air, directing it through the heating elements to create hot air, which is then blown out. For example, in industrial drying, the hot air generated by a hot air blower can quickly evaporate moisture from the surface of materials, achieving the purpose of drying.

[0023] Most hot air blowers are equipped with temperature control devices, allowing users to precisely control the hot air temperature according to their actual needs. In processes with high temperature requirements, such as drying electronic components and food processing, these devices ensure that the hot air temperature remains stable within a suitable range, guaranteeing product quality. For example, in the electronics industry, when drying printed circuit boards, the temperature needs to be controlled at a specific value to avoid damaging electronic components due to excessive heat.

[0024] Hot air blowers control the airflow by adjusting the fan speed or the damper opening. Different applications require different airflow rates; a larger airflow accelerates heat exchange and improves drying or heating efficiency, while a smaller airflow is suitable for applications requiring lower airflow speeds and gentler heating. For example, in greenhouses, the airflow of the hot air blower is adjusted according to different seasons and plant growth stages to provide a suitable growing environment for the plants.

[0025] Utilizing the high temperature and low humidity characteristics of hot air, hot air blowers can effectively remove moisture from materials, achieving the purpose of drying. In agriculture, they can be used to dry grains, fruits, vegetables, etc., extending the storage time of agricultural products. In industrial production, they can be used for drying wood, paper, textiles, etc., improving product quality and stability. For example, wood needs to be dried before processing to prevent deformation and cracking; hot air blowers can quickly and evenly remove moisture from the wood.

[0026] In cold environments, hot air blowers can provide heat to a space, serving both heating and insulation purposes. In construction sites, warehouses, workshops, and other similar locations, when indoor temperatures are low, hot air blowers can quickly raise the ambient temperature, creating comfortable working conditions for workers and protecting equipment and materials from the effects of low temperatures. For example, on construction sites in winter, hot air blowers can provide a suitable temperature environment for concrete pouring, ensuring the strength and quality of the concrete.

[0027] Some hot air blowers, in addition to their heating function, also have ventilation functions. They can heat fresh outdoor air and then deliver it indoors, while simultaneously expelling stale indoor air, thus improving indoor air quality. In densely populated places such as shopping malls, cinemas, and conference rooms, using these hot air blowers with ventilation functions can provide fresh air while maintaining indoor temperature.

[0028] In certain specific processes, hot air blowers can serve as auxiliary equipment, providing the necessary conditions for the smooth operation of the process. For example, in the plastics processing industry, hot air blowers can preheat plastic raw materials, improving their plasticizing properties and making processes such as injection molding and blow molding more stable; in welding processes, hot air blowers can preheat the welding parts, reducing welding stress and improving welding quality.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1 to 3 As shown, the present invention provides a chili drying device, including an insulated box. A wire mesh cage 4 is laterally rotatably connected to the inner wall of one side of the insulated box. An anti-accumulation component is provided on the inner wall of the wire mesh cage 4 to prevent chilies from accumulating at the bottom of the wire mesh cage 4. The wire mesh cage 4 is driven by a first drive component. A first air-blowing drying component is coaxially rotatably connected inside the wire mesh cage 4. The first air-blowing drying component is driven by a second drive component 10. A second air-blowing drying component is provided above the wire mesh cage 4. Both the first and second air-blowing drying components are connected to a hot air source. A feeding hopper 8 is provided on one side of the insulated box and is connected to one end of the wire mesh cage 4. A discharge port 2 is provided on the other side of the insulated box and is connected to the other end of the wire mesh cage 4.

[0031] In this embodiment, the hot air source is provided by the hot air blower 18.

[0032] The chili drying device provided by this invention provides a relatively stable and heat-preserving environment for the entire drying process by setting up an insulated box, reducing heat loss. The mesh cage 4, as the core component for preventing and rotating the chilies, has an anti-accumulation component inside to effectively prevent chilies from piling up and affecting drying uniformity. The first drive component provides power for the rotation of the mesh cage 4, and the first and second air-blowing drying components blow hot air onto the chilies from different directions for drying. Both are connected to a hot air source to ensure a sufficient and stable supply of hot air, which helps improve drying efficiency and quality.

[0033] Furthermore, the insulated box includes a box body 1, and an insulation layer 6 is provided on the inner wall of the box body 1.

[0034] The inner wall of the insulated box 1 is provided with an insulation layer 6. The insulation layer 6 can effectively prevent heat from the inside of the box 1 from escaping outward, maintain a stable temperature inside the box, reduce energy consumption, and improve the energy efficiency and drying effect of the drying device.

[0035] Furthermore, the first air-blowing drying assembly includes a rotating shaft 3 rotatably connected to the opposite side wall of the housing 1. The rotating shaft 3 is a tubular structure and is coaxially arranged with the mesh cage 4. One end of the rotating shaft 3 is connected to a hot air source, and the other end of the rotating shaft 3 is in transmission cooperation with the second drive assembly 10. Multiple connecting pipes 11 are circumferentially connected on the rotating shaft 3. The end of the connecting pipe 11 is connected to an air jet pipe 12. The air jet pipe 12 is arranged along the axial direction of the mesh cage 4, and multiple air jet holes are opened on the air jet pipe 12.

[0036] The rotating shaft 3 is rotatably connected to the opposite side wall of the box 1 and is a tubular structure. It is coaxially set with the mesh cage 4. One end is connected to the hot air source, and the other end is driven by the second drive component 10. This design allows the rotating shaft 3 to receive hot air and rotate under the drive of the second drive component 10, providing a basis for blowing hot air evenly onto the chili peppers.

[0037] Multiple connecting pipes 11 are connected circumferentially on the rotating shaft 3. The ends of the connecting pipes 11 are connected to the air jet pipes 12, which are arranged axially along the net cage 4 and have multiple air jet holes. When hot air enters the rotating shaft 3, it can be diverted to each air jet pipe 12 through the multiple connecting pipes 11 and then sprayed evenly from the air jet holes to blow and dry the peppers in different positions inside the net cage 4, thereby improving the uniformity of drying.

[0038] Furthermore, the second drive assembly 10 includes a drive motor, the output shaft of which is connected to a drive pulley, and one end of the rotating shaft 3 passes through the side wall of the housing 1 and is connected to a driven pulley. The drive pulley is driven by the driven pulley via a belt.

[0039] The output shaft of the drive motor of the second drive assembly 10 is connected to the drive pulley. One end of the rotating shaft 3 passes through the side wall of the housing 1 and is connected to the driven pulley. The drive pulley is driven by the belt. This belt drive method has a simple structure and smooth transmission. It can stably transmit the power of the drive motor to the rotating shaft 3, so that the rotating shaft 3 drives the jet pipe 12 to rotate, thereby realizing multi-angle blowing and drying of chili peppers.

[0040] Furthermore, the second air-blowing drying assembly includes an air duct 5 connected between opposite side walls of the housing 1. Multiple air blowers are evenly spaced on the air duct 5, and the multiple air blowers are located above the wire mesh 4. One end of the air duct 5 penetrates the side wall of the housing 1 and is connected to a hot air source.

[0041] The air duct 5 is connected between the opposite side walls of the housing 1, with one end penetrating the housing 1 and communicating with the hot air source, providing a channel for hot air delivery and ensuring that hot air can smoothly enter the air duct 5.

[0042] Multiple air blowers are evenly spaced on the air duct 5 above the net cage 4, which can blow and dry the peppers from above the net cage 4. Together with the first air blowing and drying component, it forms a multi-directional drying environment, further improving the drying effect.

[0043] Furthermore, the blower includes a jet head 16 connected to the air duct 5, and a shroud 17 is mounted on the jet head 16.

[0044] The blower nozzle 16 is connected to the air duct 5, which can concentrate the hot air in the air duct 5 and spray it out. The blower nozzle 16 is equipped with a wind cover 17, which can expand the spray range of the hot air, so that the hot air can cover a larger area of ​​the peppers and enhance the drying effect.

[0045] Furthermore, a heat-conducting cylinder 20 is coaxially sleeved on the wire mesh cage 4, and there is a gap between the heat-conducting cylinder 20 and the wire mesh cage 4. A heating component is provided on the heat-conducting cylinder 20.

[0046] A heat-conducting cylinder 20 is coaxially sleeved on the wire mesh cage 4 with a gap between them. The heat-conducting cylinder 20 can receive the heat generated by the heating component and transfer it to the peppers inside the wire mesh cage 4. The gap can prevent the heat-conducting cylinder 20 from directly contacting the wire mesh cage 4, which would cause uneven heating or local overheating of the peppers. It also facilitates air circulation and assists in the drying process.

[0047] Furthermore, the heating assembly includes a plurality of electric heating rods 7 arranged at equal intervals along the circumference of the outer wall of the heat-conducting cylinder 20, and the plurality of electric heating rods 7 are electrically connected to the temperature controller.

[0048] Multiple electric heating rods 7, electrically connected to a temperature controller, are evenly spaced along the circumference of the outer wall of the heat-conducting cylinder 20. These multiple heating rods 7 can evenly heat the heat-conducting cylinder 20, ensuring uniform heating and thus even heat transfer to the chili peppers. The temperature controller can precisely control the operating temperature of the electric heating rods 7, adjusting the temperature according to different stages and requirements of chili pepper drying, thereby improving drying quality and flexibility.

[0049] Furthermore, the anti-accumulation component includes multiple baffles 9 and multiple guide plates 19. The baffles 9 are L-shaped and are arranged circumferentially along the inner wall of the wire mesh cage 4. The multiple guide plates 19 are arranged at one end of the wire mesh cage 4 near the discharge port 2 and are wedge-shaped.

[0050] Multiple L-shaped baffles 9 are arranged circumferentially along the inner wall of the mesh cage 4. During the rotation of the mesh cage 4, the baffles 9 can prevent the chili peppers from piling up at the bottom of the mesh cage 4, so that the chili peppers are more evenly distributed in the mesh cage 4, ensuring that each chili pepper can fully contact the hot air and improve the uniformity of drying.

[0051] Multiple wedge-shaped guide plates 19 are set at one end of the wire mesh cage 4 near the discharge port 2. After drying, the guide plates 19 can guide the chili peppers to move smoothly towards the discharge port 2, which facilitates the chili pepper discharge device and improves the discharge efficiency.

[0052] Furthermore, the first drive assembly includes a motor 15 mounted on the insulation box, the output shaft of the motor 15 passing through the side wall of the insulation box and connected to a gear 14, and an external gear ring 13 fixedly sleeved on the outer wall of the mesh cage 4, the external gear ring 13 meshing with the gear 14.

[0053] The motor 15 of the first drive assembly is installed on the heat preservation box. Its output shaft passes through the side wall of the heat preservation box and is connected to the gear 14. The outer toothed ring 13 is fixedly sleeved on the outer wall of the mesh cage 4 and meshes with the gear 14. When the motor 15 starts, it drives the gear 14 to rotate, and then drives the mesh cage 4 to rotate through the outer toothed ring 13. This gear transmission method is accurate and efficient, and can stably drive the mesh cage 4 to rotate, so that the peppers are constantly turned over during the drying process, thereby improving the drying effect.

[0054] The chili drying device provided by this invention operates as follows: Wet chilies to be dried enter a rotating mesh cage 4 through a feed hopper 8. A motor 15 drives a gear 14 that meshes with an external gear ring 13, causing the mesh cage 4 to rotate slowly around its axis. Multiple baffles 9 and guide plates 19 installed on the inner wall of the mesh cage 4 continuously scoop up, scatter, and turn the chilies inside during the rotation of the mesh cage 4, effectively preventing the chilies from accumulating at the bottom of the mesh cage 4 due to gravity and ensuring that the chilies are fully dispersed.

[0055] Meanwhile, the hot air supplied by the hot air blower 18 enters the housing 1 in two directions. One direction of hot air enters through the rotating shaft 3 and is distributed through the connecting pipe 11 to the various air jet pipes 12 arranged axially along the mesh cage 4, and finally ejected from the air jet holes on the air jet pipes 12. The second drive assembly 10 drives the rotating shaft 3 and the air jet pipes 12 on it to rotate, so that the hot air can be blown from inside the mesh cage 4 at different angles and rotations towards the scattered peppers, achieving dynamic and penetrating drying, and removing moisture from the surface and inside of the peppers.

[0056] Another stream of hot air enters the air duct 5 located above the net cage 4, and blows and dries the net cage 4 and the peppers inside from top to bottom through multiple jet nozzles 16 and air hoods 17, forming a drying airflow.

[0057] During the drying process, the insulation layer 6 of the insulated box 1 and its inner wall effectively reduces heat loss and improves thermal efficiency. Optionally, the heat-conducting cylinder 20 surrounding the mesh cage 4 can be heated by multiple electric heating rods 7 on its outer wall, providing auxiliary heating to the peppers inside the mesh cage 4 through thermal radiation, further improving drying efficiency. The gap between the heat-conducting cylinder 20 and the mesh cage 4 ensures air circulation and uniform heat dissipation. The starting and stopping of the electric heating rods 7 is automatically controlled by a temperature controller according to the set temperature.

[0058] As the mesh cage 4 continues to rotate, the chili peppers are continuously dried while tumbling and gradually move towards the discharge end of the mesh cage 4. The wedge-shaped guide plate 19 set at the discharge end helps to guide the dried chili peppers smoothly and evenly out of the discharge port 2, completing the entire drying process.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A chili drying device, characterized in that, The device includes an insulated box, on one side of which a wire mesh cage (4) is rotatably connected. An anti-accumulation component is provided on the inner wall of the wire mesh cage (4) to prevent chili peppers from accumulating at the bottom of the wire mesh cage (4). The wire mesh cage (4) is driven by a first drive component. A first air-drying component is coaxially rotatably connected inside the wire mesh cage (4). The first air-drying component is driven by a second drive component (10). A second air-drying component is provided above the wire mesh cage (4). Both the first and second air-drying components are connected to a hot air source. A feeding hopper (8) is provided on one side of the insulated box and is connected to one end of the wire mesh cage (4). A discharge port (2) is provided on the other side of the insulated box and is connected to the other end of the wire mesh cage (4).

2. The chili drying apparatus according to claim 1, characterized in that, The insulated box includes a box body (1), and an insulation layer (6) is provided on the inner wall of the box body (1).

3. The chili drying apparatus according to claim 2, characterized in that, The first blowing and drying assembly includes a rotating shaft (3) rotatably connected to the opposite side wall of the housing (1). The rotating shaft (3) is a tubular structure and is coaxially arranged with the mesh cage (4). One end of the rotating shaft (3) is connected to the hot air source, and the other end of the rotating shaft (3) is driven by the second drive assembly (10). Multiple connecting pipes (11) are connected circumferentially on the rotating shaft (3). The end of the connecting pipe (11) is connected to an air jet pipe (12). The air jet pipe (12) is arranged along the axial direction of the mesh cage (4), and multiple air jet holes are opened on the air jet pipe (12).

4. The chili drying apparatus according to claim 3, characterized in that, The second drive assembly (10) includes a drive motor, the output shaft of which is connected to a drive pulley, and one end of the rotating shaft (3) passes through the side wall of the housing (1) and is connected to a driven pulley. The drive pulley is driven by the driven pulley through a belt.

5. The chili drying apparatus according to claim 2, characterized in that, The second air-blowing drying assembly includes an air duct (5) connected between opposite side walls of the housing (1). Multiple air blowers are evenly spaced on the air duct (5). The multiple air blowers are located above the wire mesh cage (4). One end of the air duct (5) passes through the side wall of the housing (1) and is connected to the hot air source.

6. The chili drying apparatus according to claim 5, characterized in that, The blower includes a jet head (16) connected to the air duct (5), and a shroud (17) is mounted on the jet head (16).

7. The chili drying apparatus according to claim 2, characterized in that, A heat-conducting cylinder (20) is coaxially sleeved on the wire mesh cage (4), and there is a gap between the heat-conducting cylinder (20) and the wire mesh cage (4). A heating component is provided on the heat-conducting cylinder (20).

8. The chili drying apparatus according to claim 7, characterized in that, The heating assembly includes a plurality of electric heating rods (7) arranged at equal intervals along the outer wall of the heat-conducting cylinder (20), and the plurality of electric heating rods (7) are electrically connected to a temperature controller.

9. The chili drying apparatus according to claim 1, characterized in that, The anti-accumulation component includes multiple baffles (9) and multiple guide plates (19). The baffles (9) are L-shaped structures. The multiple baffles (9) are arranged circumferentially along the inner wall of the wire mesh cage (4). The multiple guide plates (19) are arranged at one end of the wire mesh cage (4) near the discharge port (2), and the guide plates (19) are wedge-shaped structures.

10. The chili drying apparatus according to claim 1, characterized in that, The first drive assembly includes a motor (15) mounted on the insulation box. The output shaft of the motor (15) passes through the side wall of the insulation box and is connected to a gear (14). An external gear ring (13) is fixedly sleeved on the outer wall of the wire mesh cage (4). The external gear ring (13) meshes with the gear (14).

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