Radio frequency combined heat pump gas jet drying machine for drying camellia seeds

Abstract

The invention belongs to the technical field of grain and oil processing, and discloses a radio frequency combined heat pump gas jet dryer for drying camellia seeds, which comprises a drying box, and a drying cavity is arranged in the drying box; the material containing mechanism comprises a plurality of material containing assemblies arranged in the drying cavity, and the driving assembly circularly moves in the drying cavity in the material containing assemblies; the two radio frequency electrode plates are correspondingly arranged in the drying cavity, the radio frequency electrode plates are movably connected with the drying cavity, and the material containing assemblies are located between the two radio frequency electrode plates; an air outlet of the air heat pump communicates with an air outlet cavity formed in the drying box, and the air outlet cavity blows air to the material containing assembly through the air distribution assembly; an outlet of the drying cavity communicates with an air return opening of the air heat pump through an air return cavity formed in the drying box. Various drying technologies are combined and assisted with one another, efficient and uniform drying of camellia oleifera seeds is achieved, the drying efficiency and uniformity are improved, meanwhile, the camellia oleifera seed drying device has the advantages of being energy-saving and environmentally friendly, the automation degree is high, the application range is wide, and remarkable technical advantages and economic benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of grain and oil processing, and particularly relates to a radio frequency combined heat pump gas jet dryer for drying camellia seeds. Background Art

[0002] The drying of camellia seeds is the first process in the processing and utilization of camellia seeds, which has an important impact on the quality, oil yield and quality of the oil of camellia seeds; the moisture content of freshly harvested camellia fruits is very high, resulting in the camellia seeds being extremely prone to mildew and deterioration and difficult to store. Therefore, timely drying of camellia seeds to reduce mildew is the key to ensuring the quality of camellia seeds and the smooth progress of subsequent processing.

[0003] At present, camellia seeds are mainly dried by drying equipment such as radio frequency dryers, gas jet impingement dryers and heat pump dryers. These drying equipment have all been applied to the drying and processing of agricultural products, but these single drying technologies all have their own limitations. Among them, radio frequency drying equipment uses radio frequency electromagnetic waves as a heat source to heat and dry materials. However, the drying components of radio frequency drying equipment are usually belt-type single-layer, with disadvantages such as high energy consumption, small loading capacity and uneven heating; compared with hot air drying, the gas jet impingement dryer has advantages such as high convective heat transfer coefficient, fast drying rate and good uniformity. However, the drying of materials is affected by insufficient air flow uniformity, which will reduce the drying quality; the heat pump has a significant advantage in that it is energy-saving, but the drying efficiency is low, the processing capacity is small, and the requirements for the use environment are high. Therefore, these three drying equipment all have disadvantages in the drying of camellia seeds, affecting the quality of camellia seeds.

[0004] Therefore, the present application designs a radio frequency combined heat pump gas jet dryer for drying camellia seeds to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a radio frequency combined heat pump gas jet dryer for drying camellia seeds to solve the problems existing in the prior art.

[0006] To achieve the above purpose, the present invention provides the following solution: The present invention provides a radio frequency combined heat pump gas jet dryer for drying camellia seeds, including:

[0007] A drying chamber, in which a drying cavity for drying camellia seeds is provided;

[0008] A material loading mechanism, including a plurality of material loading components arranged in the drying cavity, the material loading components are in transmission connection with a driving component arranged in the drying cavity, and the driving component drives the material loading components to perform circular motion in the drying cavity;

[0009] Radio frequency electrode plates, two of the radio frequency electrode plates are correspondingly arranged in the drying cavity, the radio frequency electrode plates are movably connected to the drying cavity, and the material loading assemblies are both located between the two radio frequency electrode plates;

[0010] An air heat pump, the air outlet of the air heat pump is communicated with the air outlet cavity arranged in the drying box, and the air outlet cavity blows towards the material loading assembly through the air distribution assembly; the outlet of the drying cavity is communicated with the air inlet of the air heat pump through the return air cavity arranged in the drying box.

[0011] Preferably, the material loading assembly includes a loading frame provided with a plurality of through holes, connecting frames are respectively arranged at both ends of the loading frame, connecting rods are fixedly connected to the ends of the two connecting frames away from each other, and the connecting rods are in transmission connection with the driving assembly.

[0012] Preferably, the driving assembly includes a driving module and a driven module correspondingly arranged in the drying cavity, the driving module and the driven module are in transmission connection; a first transmission chain is wound around the driving module, a second transmission chain is wound around the driven module, and the two connecting rods are respectively connected to corresponding positions of the first transmission chain and the second transmission chain.

[0013] Preferably, a air distribution fan is arranged in the air outlet cavity, the inlet of the air distribution fan is communicated with the outlet of the air heat pump through an air inlet pipe, and the outlet of the air distribution fan is communicated with the air distribution assembly through a horn-shaped air distribution port.

[0014] Preferably, the air distribution assembly includes an air distribution cavity arranged in the drying cavity, the bottom end of the air distribution cavity is communicated with the drying cavity through a plurality of air distribution holes, and the outlet end of the air distribution hole is provided with an air distribution head for improving the air distribution uniformity.

[0015] Preferably, the air distribution head includes a fixing pipe threadedly installed at the outlet end of the air distribution hole, a through hole is penetrated in the fixing pipe, and an air distribution wheel is rotatably connected in the through hole.

[0016] Preferably, a plurality of adjusting motors are arranged in the drying cavity, the output end of the adjusting motor is in transmission connection with an adjusting screw rod, the adjusting screw rod is provided with threaded sections with opposite thread directions at both ends, and the two threaded sections are in threaded transmission with the radio frequency electrode plates respectively.

[0017] Preferably, the return air cavity includes a plurality of first ventilation holes and second ventilation holes, the first ventilation holes are communicated with the bottom end of the side wall of the drying cavity, the second ventilation holes are communicated with an air box arranged on the side wall of the drying box, and the air box is communicated with the air inlet of the air heat pump through a return air pipe.

[0018] Preferably, a heat pump module is provided in the air heat pump, and the heat pump module is used to recycle waste heat in the return air.

[0019] Preferably, a plurality of supporting legs are provided at the bottom end of the drying box, and a movable component for convenient position adjustment is telescopically provided inside the supporting legs.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects: the present application discloses a radio frequency combined heat pump gas jet dryer for drying camellia seeds, which is mainly composed of a drying box, a material holding mechanism, a radio frequency electrode plate and an air heat pump; a drying chamber is provided in the drying box for drying camellia seeds; the material holding mechanism includes a plurality of material holding components, which are transmission-connected to a driving component and can circulate in the drying chamber to heat the camellia seeds evenly; the radio frequency electrode plates are correspondingly arranged in the drying chamber and movably connected to the drying chamber, and the material holding component is located between the two electrode plates, and the camellia seeds are heated by radio frequency electromagnetic waves; the air outlet of the air heat pump is connected to the air outlet chamber in the drying box, and air is blown to the material holding component through the air distribution component, and the outlet of the drying chamber is connected to the return air outlet of the air heat pump through the return air chamber to realize hot air circulation and provide heat for the drying process; the dryer of the present application combines the three technologies of radio frequency, heat pump and gas jet, and two correspondingly arranged radio frequency electrode plates can make the water molecules inside the camellia seeds vibrate Heat is generated, which accelerates the dissipation of internal moisture to the outside, and accelerates the drying speed inside the oil tea seeds. The air heat pump impacts the oil tea seeds through high-temperature gas jets, and the hot air takes away the moisture on the surface of the oil tea seeds, accelerates the loss of moisture on the surface, improves the convective heat transfer coefficient, and accelerates the drying rate and the uniformity of drying. The hot air after taking away the moisture is discharged from the return air chamber, and is dried in the air heat pump and the hot air is heated again to the design temperature for cyclic drying. At the same time, the hot air circulation system of the air heat pump realizes the effective utilization of heat, reduces energy waste, improves drying efficiency, and increases the processing capacity of the equipment; overcomes the defects of a single drying technology in the drying process of oil tea seeds, improves the drying quality, and ensures the quality of oil tea seeds and the smooth progress of subsequent processing; the cyclic motion design of the material holding mechanism, in conjunction with the effects of the radio frequency electrode plate and the gas jet, enables the oil tea seeds to be more fully exposed to radio frequency electromagnetic waves and hot air in the drying chamber, ensuring the uniformity and efficiency of drying. At the same time, the technology of the present application organically combines a variety of drying methods, and dries in a sealed environment, which reduces the dependence of the drying process on the environment, expands the scope of application of the equipment, and improves the practicality of the equipment.

[0021] The various drying technologies of the present invention are combined and assisted with each other to achieve efficient and uniform drying of camellia seeds, improve drying efficiency and uniformity, and at the same time have the characteristics of energy saving and environmental protection, high degree of automation, wide range of applications, and significant technical advantages and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which form a part of this application, are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0023] Figure 1 is the axonometric view of the radio frequency combined heat pump gas jet dryer for drying camellia seeds of the present invention;

[0024] Figure 2 is the front view of the drying box of the present invention;

[0025] Figure 3 is the axonometric view of the material holding mechanism of the present invention;

[0026] Figure 4 is the side view of the material holding mechanism of the present invention;

[0027] Figure 5 is the schematic diagram of the material holding assembly of the present invention;

[0028] Figure 6 is the schematic diagram of the air distribution port structure of the present invention;

[0029] Figure 7 is the front view of the radio frequency electrode plate of the present invention;

[0030] Figure 8 is the schematic diagram of the support foot structure of the present invention;

[0031] In the figure: 1, drying box; 2, material holding mechanism; 3, radio frequency electrode plate; 4, air heat pump; 11, drying chamber; 12, air outlet chamber; 13, return air chamber; 14, air distribution chamber; 15, control chamber; 16, emission chamber; 17, support foot; 18, receiving hole; 19, lifting motor; 110, driving gear; 111, driven gear; 112, lifting screw rod; 113, lifting plate; 114, roller; 115, limit seat; 21, holding frame; 22, through hole; 23, connecting frame; 24, connecting rod; 25, first transmission chain; 26, second transmission chain; 27, driving motor; 28, transmission rod; 29, driving sprocket; 210, driven sprocket; 31, radio frequency generator; 32, control module; 33, adjusting motor; 34, adjusting screw rod; 35, threaded section; 41, air distribution fan; 42, air inlet pipe; 43, air distribution head; 44, air distribution hole; 45, air distribution port; 46, fixed pipe; 47, through hole; 48, air distribution wheel; 49, first ventilation hole; 410, second ventilation hole; 411, air box; 412, return air pipe. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Refer to Figures 1-8 As shown, this embodiment provides a radio frequency combined heat pump gas jet dryer for drying camellia oleifera seeds, including:

[0035] A drying box 1, in which a drying chamber 11 for drying camellia oleifera seeds is provided;

[0036] A material loading mechanism 2, including a plurality of material loading components arranged in the drying chamber 11. The material loading components are in transmission connection with a driving component arranged in the drying chamber 11, and the driving component drives the material loading components to perform circular motion in the drying chamber 11;

[0037] Radio frequency electrode plates 3, two radio frequency electrode plates 3 are correspondingly arranged in the drying chamber 11. The radio frequency electrode plates 3 are movably connected to the drying chamber 11, and the material loading components are all located between the two radio frequency electrode plates 3;

[0038] An air heat pump 4, the air outlet of the air heat pump 4 is communicated with an air outlet chamber 12 arranged in the drying box 1, and the air outlet chamber 12 blows towards the material loading components through a air distribution component; the outlet of the drying chamber 11 is communicated with the air inlet of the air heat pump 4 through a return air chamber 13 arranged in the drying box 1.

[0039] The present application discloses a radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds, which is mainly composed of a drying box 1, a material holding mechanism 2, a radio frequency electrode plate 3 and an air heat pump 4; a drying chamber 11 is provided in the drying box 1 for drying oil-tea camellia seeds; the material holding mechanism 2 includes a plurality of material holding components, which are transmission-connected to a driving component and can circulate in the drying chamber 11 to heat the oil-tea camellia seeds evenly; the radio frequency electrode plates 3 are correspondingly arranged in the drying chamber 11 and are movably connected to the drying chamber 11, and the material holding component is located between the two electrode plates, and the oil-tea camellia seeds are heated by radio frequency electromagnetic waves; the air outlet of the air heat pump 4 is connected to the air outlet chamber 12 in the drying box 1, and air is blown to the material holding component through the air distribution component, and the outlet of the drying chamber 11 is connected to the return air outlet of the air heat pump 4 through the return air chamber 13 to realize hot air circulation and provide heat for the drying process; the dryer of the present application combines the three technologies of radio frequency, heat pump and gas jet, and the two correspondingly arranged radio frequency electrode plates 3 can make the water molecules inside the oil-tea camellia seeds vibrate and generate heat, The air heat pump 4 accelerates the dissipation of internal moisture to the outside, accelerates the drying speed inside the camellia seeds, and the air heat pump 4 impacts the camellia seeds with high-temperature gas jets, and uses hot air to take away the moisture on the surface of the camellia seeds, accelerates the loss of moisture on the surface, improves the convective heat transfer coefficient, and accelerates the drying rate and the uniformity of drying. The hot air with the moisture taken away is discharged from the return air chamber 13, and is dried in the air heat pump 4 and the hot air is heated again to the design temperature for cyclic drying. At the same time, the hot air circulation system of the air heat pump 4 realizes the effective utilization of heat, reduces energy waste, improves drying efficiency, and increases the processing capacity of the equipment; overcomes the defects of single drying technology in the drying process of camellia seeds, improves the drying quality, and ensures the quality of camellia seeds and the smooth progress of subsequent processing; the circulating motion design of the material holding mechanism 2, in conjunction with the effects of the radio frequency electrode plate 3 and the gas jet, enables the camellia seeds to be more fully exposed to radio frequency electromagnetic waves and hot air in the drying chamber 11, thereby ensuring the uniformity and efficiency of drying. At the same time, the technology of the present application organically combines a variety of drying methods, and dries in a sealed environment, which reduces the dependence of the drying process on the environment, expands the scope of application of the equipment, and improves the practicality of the equipment. The various drying technologies of the present invention are combined and assisted with each other to achieve efficient and uniform drying of camellia seeds, improve drying efficiency and uniformity, and have the characteristics of energy saving and environmental protection, high degree of automation, wide scope of application, and significant technical advantages and economic benefits.

[0040] In one embodiment of the present application, a control chamber 15 and a transmitting chamber 16 are respectively provided at the bottom end of the drying box 1. A control module 32 is provided in the control chamber 15 for controlling the operation of the equipment; and a radio frequency generator 31 is provided in the transmitting chamber 16. The control module 32 controls the operation of the radio frequency electrode plate 3 through the radio frequency transmitter.

[0041] For a further optimized solution, the material loading assembly includes a loading frame 21 provided with a number of through holes 22. Connecting frames 23 are respectively arranged at both ends of the loading frame 21. At the ends of the two connecting frames 23 away from each other, connecting rods 24 are fixedly connected respectively. The connecting rods 24 are in transmission connection with the driving assembly. The design of the through holes 22 in the loading frame 21 facilitates the penetration of hot air. The connecting frames 23 and the connecting rods 24 are used to connect the loading frame 21 with the driving assembly, and facilitate the installation and movement of the material loading assembly. At the same time, the loading frame 21 can move driven by the driving assembly. During use, the driving assembly drives the connecting rods 24, and the connecting rods 24 pull the loading frame 21 to move in a cycle in the drying chamber 11, ensuring the uniform heating of the oil-tea camellia seeds during the drying process, and improving the drying efficiency and uniformity. The through holes 22 enable the hot air to fully contact the oil-tea camellia seeds, increasing the efficiency of moisture discharge.

[0042] For a further optimized solution, the driving assembly includes a driving module and a driven module correspondingly arranged in the drying chamber 11. The driving module and the driven module are in transmission connection. A first transmission chain 25 is wound around the driving module, and a second transmission chain 26 is wound around the driven module. The two connecting rods 24 are respectively connected to corresponding positions of the first transmission chain 25 and the second transmission chain 26. The driving module and the driven module are correspondingly arranged and in transmission connection. The driving module drives the first transmission chain 25 to rotate, and the second transmission chain 26 of the driven module rotates accordingly. The two transmission chains drive the connecting rods 24 connected thereto, thereby driving the material loading assembly to move in a cycle, ensuring the stable and reliable cyclic movement of the material loading assembly, and improving the automation degree and stability of the drying process.

[0043] In an embodiment of the present application, the diameter of the through holes 22 is smaller than the diameter of the oil-tea camellia seeds, avoiding the dropping of the oil-tea camellia seeds during the drying process and reducing waste.

[0044] In an embodiment of the present application, the open end of the loading frame 21 is always upward under the action of gravity, avoiding the falling of the oil-tea camellia seeds during the drying process.

[0045] In an embodiment of the present application, the driving module includes a number of driving sprockets 29, and the first transmission chain 25 is wound around the number of driving sprockets 29. The driven module includes a number of driven sprockets 210 correspondingly arranged with the driving sprockets 29, and the second transmission chain 26 is wound around the number of driven sprockets 210. Any one of the driving sprockets 29 is in transmission connection with a driving motor 27 arranged outside the drying box 1, providing power for the rotation of the driving sprockets 29 and the driven sprockets 210.

[0046] In an embodiment of the present application, the corresponding driving sprocket 29 and the driven sprocket 210 are in transmission through a transmission rod 28.

[0047] For a further optimized solution, a air distribution fan 41 is arranged in the air outlet cavity 12. The inlet of the air distribution fan 41 is communicated with the outlet of the air heat pump 4 through an air inlet pipe 42, and the outlet of the air distribution fan 41 is communicated with the air distribution assembly through a horn-shaped air outlet 45. The air distribution fan 41 pressurizes the hot air of the air heat pump 4 and conveys it to the air distribution assembly through the horn-shaped air outlet 45, enhancing the conveying capacity and uniformity of the hot air. When in use, the hot air of the air heat pump 4 enters the air distribution fan 41 through the air inlet pipe 42, forms a rotating air flow after being pressurized and enters the air distribution assembly through the horn-shaped air outlet 45, improving the conveying efficiency and uniformity of the hot air, enabling the hot air to act on the oil-tea seeds better and enhancing the drying effect.

[0048] For a further optimized solution, the air distribution assembly includes an air distribution cavity 14 arranged in the drying cavity 11. The bottom end of the air distribution cavity 14 is communicated with the drying cavity 11 through a plurality of air distribution holes 44, and an air distribution head 43 for improving the air distribution uniformity is installed at the outlet end of the air distribution holes 44. The air distribution cavity 14 and the air distribution holes 44 evenly distribute the hot air to the drying cavity 11, and the air outlet 45 further optimizes the air distribution effect. During operation, the hot air enters the air distribution cavity 14 and evenly blows towards the oil-tea seeds in the drying cavity 11 through the air distribution holes 44 and the air outlet 45, making the hot air more evenly distributed in the drying cavity 11, ensuring uniform drying of the oil-tea seeds and improving the drying quality.

[0049] For a further optimized solution, the air distribution head 43 includes a fixing pipe 46 threadedly installed at the outlet end of the air distribution hole 44. A through hole 47 is formed through the fixing pipe 46, and an air distribution wheel 48 is rotatably connected in the through hole 47. The fixing pipe 46 of the air distribution head 43 is used for installation, and the air distribution wheel 48 can rotate to change the blowing direction of the hot air and enhance the air distribution uniformity. The hot air passes through the through hole 47 of the fixing pipe 46 and pushes the air distribution wheel 48 to rotate, so that the hot air is blown out in different directions, further improving the air distribution uniformity, making each part of the oil-tea seeds receive more uniform heat and enhancing the drying quality. At the same time, when the air distribution wheel 48 rotates, it can make the hot air diffuse around, avoid the hot air directly blowing on the oil-tea seeds, and at the same time more conveniently form convection to accelerate the loss of moisture.

[0050] For a further optimized solution, a plurality of adjusting motors 33 are arranged in the drying cavity 11. The output end of the adjusting motor 33 is drivingly connected with an adjusting screw rod 34. Threaded sections 35 with opposite thread directions at both ends are arranged on the adjusting screw rod 34, and the two threaded sections 35 are respectively in threaded transmission with the radio frequency electrode plates 3. The adjusting motor 33 drives the adjusting screw rod 34 to rotate, and uses the threaded sections 35 to make the two radio frequency electrode plates 3 move relative to each other to adjust the distance between the electrode plates. When the adjusting motor 33 is started, it drives the adjusting screw rod 34 to rotate, and the two radio frequency electrode plates 3 approach or move away from each other under the action of the two threaded sections 35 with opposite thread directions. According to the drying requirements of the oil-tea seeds, the radio frequency electric field intensity can be flexibly adjusted to improve the drying efficiency and adaptability.

[0051] In a further optimized solution, the return air chamber 13 includes a plurality of first ventilation holes 49 and second ventilation holes 410, the first ventilation holes 49 are connected to the bottom end of the side wall of the drying chamber 11, the second ventilation holes 410 are connected to the wind box 411 arranged on the side wall of the drying box 1, and the wind box 411 is connected to the return air port of the air heat pump 4 through the return air duct 412. The hot air at the bottom of the drying chamber 11 enters the return air chamber 13 through the first ventilation holes 49, then enters the wind box 411 through the second ventilation holes 410, and finally returns to the air heat pump 4 through the return air duct 412, realizing the recycling of hot air, improving energy utilization, reducing energy consumption, and removing moisture from the returned hot air to prevent the moisture from affecting the drying process.

[0052] In one embodiment of the present application, the inner cavities of the drying chamber 11, the air distribution chamber 14 and the return air chamber 13 are respectively provided with insulation layers for heat insulation to avoid heat loss, while also avoiding the impact of the drying process on the outside world and reducing the impact of high temperature on the equipment.

[0053] To further optimize the solution, a heat pump module is provided in the air heat pump 4, and the heat pump module is used to recycle the waste heat in the return air. The heat pump module in the air heat pump 4 recycles the waste heat in the return air to improve the energy utilization efficiency. During the hot air circulation process, the heat pump module recycles the heat of the return air, further reducing the energy consumption of the dryer, improving the energy utilization efficiency, and saving energy costs.

[0054] In one embodiment of the present application, the heat pump module is a device that can efficiently transfer heat from a low-temperature heat source to a high-temperature heat source, and it works based on the reverse Carnot cycle principle. Its working process generally includes four main components: an evaporator, a compressor, a condenser, and an expansion valve.

[0055] Evaporator: Low-temperature and low-pressure refrigerant absorbs heat from low-temperature heat sources such as air, water or soil in the evaporator and evaporates into gas.

[0056] Compressor: The gaseous refrigerant is sucked in and compressed by the compressor, causing its pressure and temperature to increase.

[0057] Condenser: High-temperature and high-pressure gaseous refrigerant enters the condenser, releases heat to a high-temperature heat source such as indoor air, and condenses into liquid.

[0058] Expansion valve: Liquid refrigerant passes through the expansion valve to throttle and reduce pressure, becoming low-temperature and low-pressure liquid refrigerant, and enters the evaporator again to complete a cycle.

[0059] Heat pumps have a wide range of application fields. In the household field, common examples include air-source heat pump water heaters and ground-source heat pump air conditioning systems. Air-source heat pumps use air as the heat source, are easy to install, and can provide domestic hot water and indoor heating. Ground-source heat pumps utilize shallow geothermal resources underground, have a higher energy efficiency ratio, and operate stably, but the upfront installation cost is relatively high. In the industrial field, heat pumps can be used in processes such as drying, distillation, and evaporation to recover waste heat and improve energy utilization efficiency. In the commercial field, such as hotels, shopping malls, office buildings, etc., heat pump systems can meet the needs of heating, cooling, and domestic hot water.

[0060] Compared with traditional heating or cooling methods, heat pumps have significant advantages. They have outstanding energy-saving effects, can convert low-grade heat energy into high-grade heat energy, reduce energy consumption, and lower operating costs. At the same time, heat pumps are environmentally friendly, reduce greenhouse gas emissions, and meet the requirements of sustainable development. However, heat pumps also have some limitations. For example, the heating performance of air-source heat pumps will decline in low-temperature environments and require auxiliary heating devices; the installation of ground-source heat pumps is restricted by site conditions, and the upfront investment is relatively large.

[0061] For a further optimized solution, a number of support feet 17 are provided at the bottom end of the drying box 1, and a movable component for conveniently adjusting the position is telescopically arranged inside the support feet 17. The support feet 17 provide support, and the movable component can be telescoped to conveniently adjust the position of the dryer. When the dryer needs to be moved, the movable component is extended, and after moving to the designated position, the movable component is contracted to fix the dryer, enhancing the mobility convenience of the dryer and facilitating the installation, commissioning, and maintenance of the equipment.

[0062] In an embodiment of the present application, the movable component includes a storage hole 18 opened inside the support foot 17. An elevating motor 19 is installed inside the storage hole 18. The elevating motor 19 drives the elevating bolt to rotate through the meshing of the driving gear 110 and the driven gear 111, and then drives the elevating plate 113 threadedly connected to the elevating screw 112 to rise and fall inside the storage hole 18, so that the roller 114 at the bottom end of the elevating plate 113 enters and exits the storage hole 18, thereby facilitating movement.

[0063] In an embodiment of the present application, a limit seat 115 is provided at the bottom end of the support foot 17 to support the end of the elevating screw 112 and improve stability. At the same time, the limit seat 115 can also be used to limit the elevating plate 113 to prevent the elevating plate 113 from disengaging.

[0064] In an embodiment of the present application, each chamber on the drying box 1 is provided with an openable and closable door and window. The door and window corresponding to the drying chamber 11 is also provided with an observation window corresponding to the material loading mechanism 2, which is convenient for observing the drying degree of the camellia seeds.

[0065] In an embodiment of the present application, the control module 32 can control the radio frequency power, the radio frequency plate spacing, the material temperature, the wind speed, the internal humidity of the material, the conveyor belt speed, and the hot air temperature. The opening and closing of the radio frequency and the parameter regulation are adaptively controlled according to the material temperature. By introducing machine vision technology into the equipment, it is possible to detect the appearance quality such as the color and shrinkage rate of camellia seeds during the drying process.

[0066] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0067] The embodiments described above are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A radio frequency combined heat pump gas jet dryer for drying tea seeds, characterized in that: include: A drying box (1), wherein a drying chamber (11) for drying tea seeds is provided in the drying box (1); A material holding mechanism (2) comprising a plurality of material holding components arranged in the drying chamber (11), wherein the material holding components are in driving connection with a driving component arranged in the drying chamber (11), and the driving component drives the material holding components to perform a cyclic motion in the drying chamber (11); Radio frequency electrode plates (3), wherein two of the radio frequency electrode plates (3) are correspondingly arranged in the drying chamber (11), the radio frequency electrode plates (3) are movably connected to the drying chamber (11), and the material holding components are located between the two radio frequency electrode plates (3); An air heat pump (4), wherein the air outlet of the air heat pump (4) is connected to an air outlet chamber (12) arranged in the drying box (1), and the air outlet chamber (12) blows toward the material holding assembly through an air distribution assembly; the outlet of the drying chamber (11) is connected to the return air outlet of the air heat pump (4) through a return air chamber (13) arranged in the drying box (1).

2. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 1, characterized in that: The material holding assembly comprises a holding frame (21) provided with a plurality of through holes (22), connecting frames (23) are respectively provided at both ends of the holding frame (21), and connecting rods (24) are respectively fixedly connected at ends of the two connecting frames (23) that are away from each other, and the connecting rods (24) are drivingly connected to the driving assembly.

3. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 2, characterized in that: The driving assembly comprises an active module and a driven module which are correspondingly arranged in the drying chamber (11), and the active module and the driven module are connected in transmission; a first transmission chain (25) is wound around the active module, and a second transmission chain (26) is wound around the driven module, and the two connecting rods (24) are respectively connected to corresponding positions of the first transmission chain (25) and the second transmission chain (26).

4. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 1, characterized in that: An air distribution fan (41) is arranged in the air outlet chamber (12); the inlet of the air distribution fan (41) is connected to the outlet of the air heat pump (4) through an air inlet pipe (42); and the outlet of the air distribution fan (41) is connected to the air distribution component through a trumpet-shaped air distribution port (45).

5. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 4, characterized in that: The air distribution assembly comprises an air distribution chamber (14) arranged in the drying chamber (11); the bottom end of the air distribution chamber (14) is connected to the drying chamber (11) via a plurality of air distribution holes (44); an air distribution head (43) for improving air distribution uniformity is installed at the outlet end of the air distribution hole (44).

6. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 5, characterized in that: The air distribution head (43) comprises a fixed tube (46) threadedly mounted on the outlet end of the air distribution hole (44), a through hole (47) is formed through the fixed tube (46), and an air distribution wheel (48) is rotatably connected to the through hole (47).

7. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 1, characterized in that: A plurality of adjusting motors (33) are arranged in the drying chamber (11); the output end of the adjusting motor (33) is drivingly connected to an adjusting screw (34); the adjusting screw (34) is provided with threaded sections (35) with opposite thread rotation directions at both ends; the two threaded sections (35) are respectively threadedly driven with the radio frequency electrode plate (3).

8. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 1, characterized in that: The return air chamber (13) comprises a plurality of first ventilation holes (49) and second ventilation holes (410); the first ventilation holes (49) are connected to the bottom end of the side wall of the drying chamber (11); the second ventilation holes (410) are connected to a wind box (411) arranged on the side wall of the drying box (1); and the wind box (411) is connected to the return air port of the air heat pump (4) through a return air pipe (412).

9. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 1, characterized in that: The air heat pump (4) is provided with a heat pump module, and the heat pump module is used to recover and utilize waste heat in the return air.

10. The radio frequency combined heat pump gas jet dryer for drying oil-tea camellia seeds according to claim 1, characterized in that: A plurality of supporting legs (17) are arranged at the bottom end of the drying box (1), and a movable component for convenient position adjustment is telescopically arranged inside the supporting legs (17).

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