Granular agricultural products self-falling mixing microwave drying equipment

Abstract

The present invention relates to the field of agricultural machinery technology, and in particular to a self-falling mixed microwave drying device for granular agricultural products. The self-falling mixed microwave drying device for granular agricultural products comprises a frame, a drying box, a hot air device, a microwave generator, a discharge device and a lifting device. The drying box is arranged on the frame, and the drying box is provided with an air inlet duct and an air outlet, and the drying box has a feed port and a discharge port. The hot air device is used to blow hot air into the air inlet duct. The microwave generator is used to generate microwaves to dry the agricultural products in the drying box. The discharge device is used to receive the agricultural products discharged from the discharge port. The lifting device is used to lift the agricultural products to the feed port. The present invention utilizes hot air and microwaves to move in the drying box, so that the agricultural products in the drying box can be dried by hot air and microwave at the same time. The agricultural products can circulate in the lifting device, the drying box and the discharge device in sequence, so that the drying box can perform multiple drying processes on the agricultural products.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, in particular to a self-falling mixing microwave drying device for granular agricultural products. Background Art

[0002] Granular agricultural products have a high moisture content after harvest. If the granular agricultural products are not dried promptly and effectively, they will deteriorate and cause loss of agricultural product yield and reduction in quality.

[0003] Currently, common drying methods include natural air drying, hot air drying, and microwave drying. Natural air drying requires a lot of manpower and site resources, and has great limitations in the harvesting and processing of a large number of agricultural products. Hot air drying has the advantages of low cost and simple operation. Hot air drying is widely used, and traditional grain drying towers use hot air drying. However, hot air drying equipment has problems such as high energy consumption and low efficiency. Microwave drying equipment uses high-frequency electromagnetic waves as a heating source, relying on microwaves to penetrate into the interior of the material to cause polar molecules to swing and friction to generate heat. It has the characteristics of precision, high efficiency, and strong penetration, but the unevenness of microwave drying will affect the quality of the material. Therefore, designing a drying equipment with uniform drying and simple structure is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The present invention provides a self-falling mixing microwave drying device for granular agricultural products, which is used to solve the defects of uneven drying and complex structure of drying devices for agricultural products in the prior art, and realizes more uniform drying and higher drying efficiency.

[0005] The present invention provides a self-falling mixing microwave drying device for granular agricultural products, comprising:

[0006] frame;

[0007] A drying box, the drying box being mounted on the frame, one of the two opposite side walls of the drying box being provided with an air inlet duct, and the other being provided with an air outlet, the air inlet duct being in communication with the interior of the drying box, the top wall of the drying box being provided with a feed inlet, and the bottom wall of the drying box being provided with a feed outlet;

[0008] a hot air device, the hot air device being used to blow hot air into the air inlet duct;

[0009] a microwave generator configured to generate microwaves to dry the agricultural products in the drying box, the microwave generator comprising a microwave source and a housing having a resonant cavity therein; the housing being disposed in the drying box, the microwave source being located between the housing and the drying box, and being connected to the housing;

[0010] a discharge device, the discharge device being provided at the bottom wall of the drying box and being used to receive the agricultural products discharged from the discharge port;

[0011] A lifting device is provided, which is used to lift agricultural products to the feed port. The lifting device can be selectively connected to the discharge device. The lifting device includes a conveying device, an elevator housing, a circulation hopper, a hopper and a lifting motor. The lifting motor drives the conveying device to move to transport agricultural products to the hopper. The hopper is connected to the feed port. The circulation hopper is provided at the discharge device and is used to transport agricultural products from the discharge device to the conveying device. The elevator housing is sealed and connected to the top of the drying box. An observation window is also provided on the top of the elevator housing.

[0012] According to a granular agricultural product self-falling mixing microwave drying equipment provided by the present invention, the discharge device includes a discharge valve and a discharge motor, the feed end of the discharge valve is connected and communicated with the discharge port, and the discharge motor drives the discharge valve to be opened and closed.

[0013] According to a self-falling mixing microwave drying device for granular agricultural products provided by the present invention, the hot air device includes a fan, an air heater and a hot air pipe, one end of the hot air pipe is connected to the air heater, and the other end of the hot air pipe is connected to the air inlet duct, and the fan drives the air flow through the hot air pipe to flow into the drying box.

[0014] According to the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention, the air inlet duct is connected to the drying box through a plurality of air inlets.

[0015] According to the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention, metal shielding nets are provided at the air inlet and the air outlet.

[0016] According to the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention, the drying box is provided with a storage bin and a drying bin from top to bottom, the interior of the drying bin has a vertical middle cavity, and the storage bin is connected to the middle cavity.

[0017] According to a self-falling mixing microwave drying device for granular agricultural products provided by the present invention, an air inlet angle box and an air outlet angle box are provided in the drying box, and the air inlet angle box and the air outlet angle box are distributed in the middle cavity. One end of the air inlet angle box is connected to the air inlet duct, and the other end of the air inlet angle box is a closed end. One end of the air outlet angle box is connected to the air outlet, and the other end of the air outlet angle box is a closed end.

[0018] According to the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention, there are multiple air inlet angular boxes and multiple air outlet angular boxes.

[0019] The plurality of air inlet angular boxes and the plurality of air outlet angular boxes are arranged in a vertical direction, and each of the air inlet angular boxes and each of the air outlet angular boxes extend in a horizontal direction.

[0020] According to the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention, the air outlet horn box is located in the middle of the drying box.

[0021] The air inlet angular boxes are distributed on both sides of the air outlet angular box in the left and right directions;

[0022] In the vertical direction, at least one of the air outlet angular boxes is distributed between any two adjacent air inlet angular boxes;

[0023] The two ends of the air inlet angle box and the air outlet angle box are respectively fixed on the front and rear wall surfaces of the drying box.

[0024] According to a self-falling mixing microwave drying device for granular agricultural products provided by the present invention, the microwave source includes multiple magnetrons, and the multiple magnetrons are arranged on both sides of the drying bin. The microwave frequency of the magnetrons is 2450MHz, and the maximum output power of the magnetrons is 1000W.

[0025] The self-falling microwave drying equipment for granular agricultural products according to an embodiment of the present invention utilizes hot air and microwaves to move within a drying chamber, thereby simultaneously drying the agricultural products within the drying chamber through hot air and microwave drying, thereby drying the agricultural products more evenly. Furthermore, the agricultural products can circulate sequentially within the lifting device, drying chamber, and discharge device, allowing the agricultural products to undergo multiple drying processes within the drying chamber, thereby improving the drying efficiency of the self-falling microwave drying equipment for granular agricultural products. Furthermore, the self-falling microwave drying equipment for granular agricultural products heats the agricultural products more evenly, increasing the evaporation rate of the agricultural products to fully remove moisture from the agricultural products and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention;

[0028] Figure 2 This is a rear view of the self-falling mixing microwave drying equipment for granular agricultural products provided by the present invention;

[0029] Figure 3 It is a schematic cross-sectional view of the drying box provided by the present invention;

[0030] Figure 4 It is a schematic cross-sectional structural diagram of the drying box provided by the present invention.

[0031] Reference numerals:

[0032] 100. Granular agricultural products self-falling mixing microwave drying equipment;

[0033] 110, rack;

[0034] 200, drying oven; 210, air inlet duct; 211, air inlet; 220, air outlet duct; 221, air outlet; 230, feed inlet; 240, discharge outlet; 250, storage bin; 260, drying bin; 261, middle cavity; 262, air inlet angular box; 263, air outlet angular box; 264, first opening; 265, second opening; 270, upper air outlet; 280, lower air outlet;

[0035] 300, hot air device; 310, fan; 320, air heater; 330, hot air pipe;

[0036] 400, microwave generating device; 410, microwave source; 420, housing; 421, resonant cavity;

[0037] 500, discharge device; 510, discharge valve; 520, discharge motor;

[0038] 600, lifting device; 620, lifting machine housing; 621, observation window; 630, circulation hopper; 640, hopper; 650, lifting motor;

[0039] 700. Discharging device. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] The following combination Figures 1-4The granular agricultural product self-falling mixing microwave drying device 100 of the present invention is described. It should be noted that the granular agricultural product self-falling mixing microwave drying device 100 can dry a large amount of granular agricultural products to remove moisture from the agricultural products.

[0042] The self-falling mixing microwave drying device 100 for granular agricultural products according to an embodiment of the present invention includes: a frame 110 , a drying box 200 , a hot air device 300 , a microwave generating device 400 , a discharging device 500 and a lifting device 600 .

[0043] Specifically, combined Figure 1 As shown, a drying oven 200 is mounted on a frame 110. An air inlet 210 is provided on one of the two opposing sidewalls of the drying oven 200, and an air outlet 221 is provided on the other. The air inlet 210 communicates with the interior of the drying oven 200. The top wall of the drying oven 200 has an inlet 230, and the bottom wall of the drying oven 200 has an outlet 240. A hot air device 300 blows hot air into the air inlet 210. As will be appreciated, agricultural products are suitable for entering the drying oven 200 through the inlet 230 and moving toward the outlet 240 under the action of gravity. Hot air enters the drying oven 200 through the air inlet 210, flows from one sidewall of the drying oven 200 to the other, and is then discharged through the air outlet 221. In this way, the hot air dries the agricultural products within the drying oven 200. This dries the agricultural products, removing moisture and preventing spoilage. At the same time, during the drying process, the agricultural products discharge moisture to the outside, and the hot air can take away the moisture and then be discharged to the outside of the drying box 200 from the air outlet 221. This can maintain a low moisture environment in the drying box 200 to accelerate the evaporation of moisture from the agricultural products.

[0044] Combine Figure 4 As shown, a microwave generator 400 is used to generate microwaves to dry the agricultural products within the drying oven 200. The microwaves heat the agricultural products, accelerating the evaporation of moisture. The microwave generator 400 includes a microwave source 410 and a housing 420. The housing 420 defines a resonant cavity 421. The housing 420 is disposed within the drying oven 200, and the microwave source 410 is located between the housing 420 and the drying oven 200. It will be appreciated that the microwave source 410 generates microwaves that penetrate the housing 420 to heat and dry the agricultural products within the drying oven 200. The resonant cavity 421 evenly distributes the microwaves throughout the drying oven 200, effectively drying the agricultural products within the drying oven 200.

[0045] It is understood that hot air can contact the surface of the agricultural products to dry them. It is understood that hot air drying dries the agricultural products from the outside in. Microwaves can penetrate into the interior of the agricultural products, causing the polar molecules within the agricultural products to oscillate and rub, generating heat to dry the agricultural products. It is understood that microwave drying dries the agricultural products from the inside out. The combined effects of microwave drying and hot air drying allow the agricultural products in drying box 200 to be heated more evenly, increasing the evaporation rate of the agricultural products, effectively removing moisture from the agricultural products and ensuring their quality.

[0046] Combine Figure 1 and Figure 2 As shown, a discharge device 500 is disposed on the bottom wall of the drying oven 200 and is used to receive agricultural products discharged from the discharge port 240. A lifting device 600 is used to lift the agricultural products to the feed port 230 and is optionally connected to the discharge device 500. It is understood that the discharge device 500 can be loaded with dried agricultural products and discharge them into the lifting device 600. The lifting device 600 then lifts the agricultural products to the feed port 230, allowing them to enter the drying oven 200 for further drying. In this way, the agricultural products can circulate multiple times within the lifting device 600, the drying oven 200, and the discharge device 500, allowing the agricultural products to undergo a cyclic drying process. This improves the drying efficiency of the granular agricultural product self-falling mixing microwave drying equipment 100, effectively removing moisture from the agricultural products, preventing spoilage and corruption, and ensuring product quality.

[0047] Further, combined with Figure 1 As shown, the lifting device 600 includes a conveyor, an elevator housing 620, a circulating hopper 630, a hopper 640, and a lifting motor 650. The lifting motor 650 drives the conveyor to move the agricultural products to the hopper 640. The hopper 640 is connected to the feed inlet 230. The circulating hopper 630 is located at the discharge device 500 and is used to transport the agricultural products from the discharge device 500 to the conveyor. It will be understood that the circulating hopper 630 transports the agricultural products from the discharge device 500 to the conveyor, which then lifts the agricultural products to the hopper 640. The hopper 640 then pours the agricultural products into the feed inlet 230. In this way, the lifting device 600 can transport the agricultural products from the discharge device 500 to the feed inlet 230, where they are then re-entered into the drying oven 200 for drying.

[0048] Combine Figure 1 and Figure 2As shown, the elevator housing 620 is sealed and connected to the top of the drying box 200, and the internal space of the elevator housing 620 is connected to the feed port 230. In this way, after the hopper 640 dumps the agricultural products, the agricultural products can enter the feed port 230 along the elevator housing 620. Figure 1 As shown, an observation window 621 is further provided on the top of the elevator housing 620. The operator can observe the agricultural products in the hopper 640 falling into the drying box 200 through the observation window 621. In some examples, the observation window 621 is provided with a microwave shielding device to prevent microwave leakage.

[0049] According to the self-falling microwave drying apparatus 100 for granular agricultural products of the present invention, by utilizing hot air and microwaves to move within the drying oven 200, the agricultural products within the drying oven 200 can be simultaneously dried by hot air and microwaves, thereby drying the agricultural products more evenly. Furthermore, the agricultural products can circulate sequentially within the lifting device 600, the drying oven 200, and the discharge device 500, thereby allowing the agricultural products to undergo multiple drying processes within the drying oven 200, thereby improving the drying efficiency of the self-falling microwave drying apparatus 100 for granular agricultural products. Furthermore, the self-falling microwave drying apparatus 100 for granular agricultural products heats the agricultural products more evenly, increasing the evaporation rate of the agricultural products' moisture, thereby fully removing moisture from the agricultural products and ensuring their quality.

[0050] In some examples, combined Figure 3 As shown, an outlet duct 220 is provided at the air outlet 221. An upper air outlet 270 is provided at the top of the outlet duct 220, and a lower air outlet 280 is provided at the bottom of the air inlet duct 210. A hot air device 300 is provided at the bottom wall of the drying box 200. This allows hot air to enter the drying box 200 through the lower air outlet 280 and then be discharged through the upper air outlet 270. This allows the hot air to flow longer within the drying box 200, thereby accelerating the evaporation of moisture from the agricultural products and shortening the drying time. In addition, when the hot air moves upward, it moves in a different direction from the free-falling agricultural products, which can slow the falling speed of the agricultural products, prolong the contact time between the agricultural products and the hot air flow, and improve the drying effect. It can also prevent the agricultural products from being damaged by falling.

[0051] According to some embodiments of the present invention, Figure 1 and Figure 2As shown, the discharge device 500 includes a discharge valve 510 and a discharge motor 520. The feed end of the discharge valve 510 is connected and communicated with the discharge port 240, and the discharge motor 520 drives the discharge valve 510 on and off. When the discharge valve 510 is closed, the agricultural products cannot be discharged from the discharge port 240, and the agricultural products accumulate in the drying box 200; when the discharge valve 510 is opened, the accumulated agricultural products can be discharged from the discharge port 240 at a uniform speed. In this way, the time that the agricultural products stay in the drying box 200 can be extended, allowing the microwaves and hot air to fully contact the agricultural products, thereby accelerating the evaporation of moisture in the agricultural products. In some examples, the horizontal ends of the discharge valve 510 are closed, and the gap between the blades of the discharge valve 510 and the inner wall of the discharge valve 510 is small to prevent microwaves from leaking from the discharge valve 510.

[0052] According to some embodiments of the present invention, Figure 2 As shown, the hot air device 300 includes a fan 310, an air heater 320, and a hot air pipe 330. One end of the hot air pipe 330 is connected to the air heater 320, and the other end of the hot air pipe 330 is connected to the air inlet duct 210. The fan 310 drives the air flow through the hot air pipe 330 into the drying oven 200. It will be understood that when the air flow passes through the air heater 320, the air heater 320 heats the air flow, increasing the air flow temperature and forming hot air. The hot air can flow through the hot air pipe 330 to the air inlet duct 210. In this way, the hot air device 300 can blow hot air into the air inlet duct 210. In some examples, the surface of the hot air pipe 330 can be wrapped with insulation material to reduce heat loss.

[0053] According to some embodiments of the present invention, Figure 4 As shown, the air inlet duct 210 is connected to the drying box 200 via multiple air inlets 211. The air inlets 211 are located on the sidewalls of the drying box 200, allowing hot air to enter the drying box 200 through the multiple air inlets 211. This increases the flow rate of hot air within the drying box 200, accelerating the evaporation of moisture from the agricultural products and shortening the drying time. In some examples, the multiple air inlets 211 are arranged vertically on the sidewalls of the drying box 200. This allows hot air to enter the drying box 200 from different heights, ensuring uniform distribution of the hot air within the drying box 200 and improving heating efficiency.

[0054] In some examples, combined Figure 3 As shown, the air outlet duct 220 is connected to the drying box 200 through a plurality of air outlets 221. The plurality of air outlets 221 are arranged vertically on the side wall opposite to the air inlet 211. This allows the drying box 200 to exhaust air more quickly, allowing the moisture in the drying box 200 to be discharged more quickly.

[0055] According to some embodiments of the present invention, Figure 3 and Figure 4As shown, metal shielding mesh is installed at both the air inlet 211 and the air outlet 221. The metal shielding mesh prevents microwaves from leaking from the air inlet 211 and the air outlet 221, reducing microwave loss and thus saving energy. In some examples, the drying oven 200 is made of metal, for example, stainless steel. This restricts the movement of microwaves within the drying oven 200 and prevents microwave leakage. In some examples, metal shielding mesh is installed at both the upper air outlet 270 and the lower air outlet 280.

[0056] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the drying box 200 is provided with a storage bin 250 and a drying bin 260 from top to bottom. The drying bin 260 has a vertical middle cavity 261 inside. The storage bin 250 is connected to the middle cavity 261. The agricultural products can first enter the storage bin 250 and then enter the drying bin 260 from the storage bin 250. The agricultural products can be dried in the middle cavity 261. In some examples, combined with Figure 4 As shown, the microwave generator 400 is attached to the left and right sidewalls of the drying chamber 260, wherein the housing 420 is attached to the sidewalls of the central cavity 261, and the microwave source 410 is disposed on the outer surface of the housing 420. Furthermore, the storage chamber 250 and the drying chamber 260 can be made of polytetrafluoroethylene to ensure that microwaves can penetrate the central cavity 261 to heat the agricultural products.

[0057] According to some embodiments of the present invention, Figure 3 As shown, the drying box 200 is provided with an air inlet angle box 262 and an air outlet angle box 263, which are distributed in the middle cavity 261. One end of the air inlet angle box 262 is connected to the air inlet duct 210, and the other end of the air inlet angle box 262 is a closed end. One end of the air outlet angle box 263 is connected to the air outlet 221, and the other end of the air outlet angle box 263 is a closed end.

[0058] As will be appreciated, on the side wall of the drying box 200, which is provided with the air inlet duct 210, one end of the air inlet angled box 262 is connected to the air inlet duct 210; on the side wall of the drying box 200, which is provided with the air outlet 221, one end of the air outlet angled box 263 is connected to the air outlet 221. In this way, hot air flows through the air inlet duct 210 to the air inlet angled box 262. Guided by the air inlet angled box 262, it disperses and flows to the air outlet angled box 263. Under the guidance of the air outlet angled box 263, the hot air gradually converges and flows to the air outlet 221. This extends the distance the hot air travels, prolonging the contact time between the hot air and the agricultural products, and ensuring sufficient moisture evaporation from the agricultural products.

[0059] According to some embodiments of the present invention, Figure 4As shown, multiple inlet angular boxes 262 and outlet angular boxes 263 are arranged vertically. By utilizing these multiple inlet angular boxes 262 and outlet angular boxes 263, the distance the hot air travels can be further extended, ensuring uniform distribution of the hot air within the drying chamber 200. Each inlet angular box 262 and outlet angular box 263 extends horizontally. This prevents agricultural products from exiting the drying chamber 260 through the air inlet duct 210 and air outlet 221.

[0060] According to some embodiments of the present invention, Figure 4 As shown, the air outlet angular box 263 is located in the middle of the drying box 200, and air inlet angular boxes 262 are distributed on both sides of the air outlet angular box 263 in the left and right directions. In the up and down directions, at least one air outlet angular box 263 is distributed between any two adjacent air inlet angular boxes 262. It should be explained here that, in the direction of falling of agricultural products, the air outlet angular box 263 located above can guide the agricultural products to move toward the air inlet angular box 262 located below, and the air inlet angular box 262 located above can guide the agricultural products to move toward the air outlet angular box 263 located below. In this way, the movement trajectory of the agricultural products can be made S-shaped to slow down the falling speed of the agricultural products, avoid damage to the agricultural products due to falling too fast, and at the same time extend the drying time of the agricultural products in the drying box 200. Combined with Figure 3 As shown, the two ends of the air inlet angular box 262 and the air outlet angular box 263 are respectively fixed to the front and rear walls of the drying box 200. In this way, the air inlet angular box 262 and the air outlet angular box 263 can be stably installed in the drying box 200.

[0061] Furthermore, hot air enters the drying oven 200 through the air inlet duct 210. The air inlet angled box 262 guides the hot air toward the center of the drying oven 200, causing the hot air to move upward. During this upward movement, the air outlet angled box 263 guides the hot air out of the air outlet 221. This creates a U-shaped trajectory for the hot air, ensuring a more even distribution within the drying oven 200. Furthermore, the upward movement of the hot air slows down the falling speed of the agricultural products, preventing them from being damaged by excessive falling speed.

[0062] In some examples, combined Figure 4As shown, the inlet angled box 262 has a flat cross-sectional structure. One end of the flat plate is connected to the left and right side walls of the drying chamber 260, forming a right triangle with the side walls of the drying chamber 260. The flat plate and the side walls of the drying chamber 260 form an acute angle. One side of the right triangle corresponding to the acute angle is provided with a first opening 264, which faces the center of the drying chamber 200. When hot air enters the drying chamber 200 from the air inlet duct 210, the flat plate guides the hot air toward the center of the drying chamber 200. Furthermore, the air inlet duct is positioned within the right triangle structure, so that the inlet angled box 262 prevents agricultural products from being discharged from the air inlet duct 210.

[0063] In addition, combined Figure 4 As shown, the cross-sectional shape of the outlet angle box 263 is an isosceles triangle. A second opening 265 is provided at the base of the isosceles triangle, oriented toward the discharge port 240. This allows hot air within the drying oven 200 to flow from the second opening 265 toward the outlet 221 and out of the drying oven 200. Furthermore, the outlet's placement within the isosceles triangle prevents agricultural products from being discharged through the outlet 221.

[0064] In some examples, combined Figure 4 As shown, the height of the outlet angular box 263 is higher than the height of the inlet angular box 262 (i.e., the outlet angular box 263 is closer to the feed inlet 230 than the inlet angular box 262). This can extend the U-shaped trajectory of the hot air and further slow the falling speed of the agricultural products.

[0065] In some examples, the air inlet angular box 262 and the air outlet angular box 263 are both made of polytetrafluoroethylene material to ensure that microwaves can pass through the air inlet angular box 262 and the air outlet angular box 263 to heat the agricultural products.

[0066] According to some embodiments of the present invention, Figure 4 As shown, microwave source 410 includes multiple magnetrons, which can be located on both sides of drying chamber 260. The microwaves generated by the magnetrons enter drying chamber 260 from both sidewalls, thereby evenly distributing the microwaves within drying box 200. The microwave frequency of the magnetrons is 2450 MHz, and the maximum output power of the magnetrons is 1000 W.

[0067] According to some embodiments of the present invention, Figure 1As shown, the granular agricultural product self-falling mixing microwave drying equipment 100 also includes a discharge device 700, which is arranged on the frame 110. The discharge device 700 is used to place the agricultural products into the lifting device 600. The user can place the agricultural products into the granular agricultural product self-falling mixing microwave drying equipment 100 for drying through the discharge device 700.

[0068] The working process of the granular agricultural product self-falling mixing microwave drying equipment 100 according to the embodiment of the present invention is as follows:

[0069] Here, the agricultural products' falling process is described: The agricultural products are poured into the conveyor through the discharge device 700. The conveyor lifts the agricultural products to the hopper 640, which then pours the agricultural products into the feed port 230. The agricultural products then enter the drying chamber 260 and fall freely. Guided by the air inlet horn 262 and the air outlet horn 263, the agricultural products form an S-shaped trajectory within the drying chamber 200. Once the agricultural products reach the discharge port 240, the discharge valve 510 closes, and the agricultural products accumulate within the drying chamber 200.

[0070] Here, the working process of the microwave generator 400 and the hot air device 300 is described: when the agricultural products enter the feed port 230, the microwave generator 400 and the hot air device 300 work to supply hot air and microwaves into the drying box 200 to dry the agricultural products;

[0071] After the agricultural products have been dried for a period of time, the discharge valve 510 opens, and the discharge motor 520 rotates at a constant speed to discharge the agricultural products. The agricultural products can then be returned to the conveyor through the circulation hopper 630, and then lifted by the conveyor to the hopper. The hopper pours the agricultural products into the drying box 200 for a second drying process. At this point, the agricultural products can be circulated and dried in the granular agricultural product self-falling mixing microwave drying equipment 100.

[0072] The present invention provides a self-falling mixed microwave drying device 100 for granular agricultural products. During the self-falling process of the agricultural products, microwaves heat them, hot air dries the agricultural products, and removes waste gas. The mixed drying avoids the shortcomings of a single drying method. The structure of the drying chamber 260 is conducive to the uniform distribution of hot air, improves the heating efficiency, and at the same time slows down the falling speed of the agricultural products to avoid damage to the agricultural products. The discharge device 500 controls the agricultural products to fall at a uniform speed in the drying chamber 260 after they are accumulated, ensuring uniform drying. The lifting device 600 can cooperate with the discharge device 500 to continuously and automatically load and unload the agricultural products, thereby realizing the cyclic drying of the agricultural products.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A microwave drying device for granular agricultural products with self-falling mixing, characterized in that: include: frame; A drying box, the drying box being mounted on the frame, one of the two opposite side walls of the drying box being provided with an air inlet duct, and the other being provided with an air outlet, the air inlet duct being in communication with the interior of the drying box, the top wall of the drying box being provided with a feed inlet, and the bottom wall of the drying box being provided with a feed outlet; a hot air device, the hot air device being used to blow hot air into the air inlet duct; a microwave generator configured to generate microwaves to dry the agricultural products in the drying box, the microwave generator comprising a microwave source and a housing having a resonant cavity therein; the housing being disposed in the drying box, the microwave source being located between the housing and the drying box, and being connected to the housing; a discharge device, the discharge device being provided at the bottom wall of the drying box and being used to receive the agricultural products discharged from the discharge port; a lifting device, the lifting device being used to lift the agricultural products to the feed inlet, the lifting device being selectively connected to the discharge device, the lifting device comprising a conveyor, a lifting machine housing, a circulation hopper, a hopper, and a lifting motor, the lifting motor driving the conveyor to move the agricultural products to the hopper, the hopper being connected to the feed inlet, the circulation hopper being provided at the discharge device and being used to transport the agricultural products from the discharge device to the conveyor, the lifting machine housing being sealed and connected to the top of the drying box, and an observation window being provided on the top of the lifting machine housing; The drying box is provided with a storage bin and a drying bin from top to bottom, the interior of the drying bin has a vertical middle cavity, and the storage bin is connected to the middle cavity; The drying box is provided with an air inlet angular box and an air outlet angular box. The air outlet angular box is located in the middle of the drying box. The air inlet angular boxes are distributed on both sides of the air outlet angular box in the left and right directions. The air inlet angular box and the side wall of the drying chamber form a right triangle structure and are provided with a first opening facing the middle position of the drying chamber; The cross-section of the air outlet angular box is an isosceles triangle structure, and is provided with a second opening facing the discharge port.

2. The granular agricultural product self-falling mixing microwave drying equipment according to claim 1, characterized in that: The discharge device includes a discharge valve and a discharge motor. The feed end of the discharge valve is connected and communicated with the discharge port, and the discharge motor drives the discharge valve to be opened and closed.

3. The granular agricultural product self-falling mixing microwave drying equipment according to claim 1, characterized in that: The hot air device includes a fan, an air heater and a hot air pipe, one end of the hot air pipe is connected to the air heater, the other end of the hot air pipe is connected to the air inlet duct, and the fan drives the air flow through the hot air pipe to flow into the drying box.

4. The granular agricultural product self-falling mixing microwave drying equipment according to claim 1, characterized in that: The air inlet duct is communicated with the drying box through a plurality of air inlets.

5. The self-falling mixing microwave drying equipment for granular agricultural products according to claim 4, characterized in that: Metal shielding nets are provided at the air inlet and the air outlet.

6. The self-falling mixing microwave drying equipment for granular agricultural products according to claim 1, characterized in that: One end of the air inlet angular box is connected to the air inlet duct, and the other end of the air inlet angular box is a closed end. One end of the air outlet angular box is connected to the air outlet, and the other end of the air outlet angular box is a closed end.

7. The self-falling mixing microwave drying equipment for granular agricultural products according to claim 6, characterized in that: There are multiple air inlet angular boxes and multiple air outlet angular boxes. The plurality of air inlet angular boxes and the plurality of air outlet angular boxes are arranged in a vertical direction, and each of the air inlet angular boxes and each of the air outlet angular boxes extend in a horizontal direction.

8. The self-falling mixing microwave drying equipment for granular agricultural products according to claim 7, characterized in that: In the vertical direction, at least one of the air outlet angular boxes is distributed between any two adjacent air inlet angular boxes; The two ends of the air inlet angle box and the air outlet angle box are respectively fixed on the front and rear wall surfaces of the drying box.

9. The self-falling mixing microwave drying equipment for granular agricultural products according to claim 1, characterized in that: The microwave source includes a plurality of magnetrons, which are arranged on both sides of the drying chamber. The microwave frequency of the magnetrons is 2450 MHz, and the maximum output power of the magnetrons is 1000 W.

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