Semi-open movable grain heat pump dehumidifier

Abstract

The invention relates to the technical field of agricultural machinery, in particular to a semi-open movable grain heat pump dehumidifier which comprises a movable frame and a dehumidification mechanism, the dehumidification mechanism is composed of a dehumidification box and a hot air unit, the dehumidification box is supported and fixed on the movable frame and is composed of an outer box plate, an inner box plate and an end plate, the outer box plate and the inner box plate are sleeved with each other, and the end plate is fixed on the movable frame. An interlayer ventilation chamber is formed in the middle of the outer box plate, the front end and the rear end of the interlayer ventilation chamber are blocked through end plates, the outer box plate, the inner box plate and the end plates are matched to form the complete semi-open type dehumidification granary, and screen holes are formed in the surface of the inner box plate and communicated with the interlayer ventilation chamber. The dehumidifier provided by the invention improves the dehumidification efficiency and reduces the energy consumption through the innovative design and technical integration of the main parts such as the overall structural design, the air supply and exhaust system, the automatic feeding and discharging system, the movable chassis and the material turning and throwing device, is environment-friendly, and is suitable for being used in farms of various scales.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a semi-open mobile grain heat pump dehumidifier. Background Art

[0002] In agricultural production, grain dehumidification is a key step to ensure grain quality and storage life. In the post-harvest processing of wheat in rainy weather, dehumidification is an important process that directly affects grain quality. Grain dehumidification plays a pivotal role in ensuring good grain quality, reducing the risk of grain disasters, and ensuring that grain harvests are effectively maintained. High-moisture wet grains must be dehydrated and dehumidified to reduce their moisture to below the safe moisture before they can be stored in the short term. Traditional dehumidification methods, such as natural drying and hot air furnace dehumidification, usually require a lot of space and time. Especially in the event of disaster weather or emergencies, the grain drying efficiency and quality cannot be guaranteed, and there are problems such as low dehumidification efficiency, high energy consumption, environmental pollution and uneven dehumidification. With the modernization of agriculture and the improvement of environmental protection requirements, higher requirements are placed on grain dehumidification technology. As a highly efficient and energy-saving dehumidification technology, heat pump dehumidification technology has received widespread attention and application in the field of grain dehumidification in recent years. Heat pump drying technology uses a heat pump system to absorb heat from the surrounding environment, and releases heat in the condenser after compression by a compressor to heat the air in the drying room, thereby achieving dehumidification of grains. This technology has the advantages of low energy consumption, high drying efficiency, and environmental friendliness. However, most of the existing heat pump grain dryers are fixed and inconvenient to move, which limits their application in agricultural production.

[0003] In recent years, extreme weather has occurred frequently, leading to floods and urban waterlogging, and wheat storage and transportation have faced unprecedented challenges. Especially in Henan Province of my country, the continuous rotten field rain season has caused the moisture content of wheat to be as high as about 35%, which is much higher than the moisture content of normal wheat, and it is very easy to cause mildew, insect pests and other dangerous conditions. Most of the research on wheat dehumidification technology and post-drying quality is only for normally harvested wheat. There is a big difference in the physical properties between normally harvested wheat and high-moisture wheat. The existing wheat drying technology is not suitable for the dehumidification of high-moisture wheat, and the existing dehumidification equipment is difficult to meet the problem of high-quality and efficient storage of grains under emergency disasters. Small mobile dehumidifiers suitable for agricultural machinery professionals are extremely scarce, and there are generally problems of low technical content, few types, and high energy consumption. Therefore, it has become an urgent problem to study the rapid dehumidification and loss reduction technology of wheat grains, develop efficient and rapid dehumidification equipment, improve drying efficiency and quality, and ensure the safe storage and supply of grain. Summary of the invention

[0004] In response to the above-mentioned defects and problems, the present invention provides a semi-open mobile grain heat pump dehumidifier, which aims to solve the problems of low efficiency, high energy consumption, and environmental pollution of traditional dehumidification methods, while overcoming the disadvantage of the inconvenience of mobility of fixed heat pump dryers, and providing a new technical solution for grain dehumidification.

[0005] The solution adopted by the present invention to solve its technical problem is: a semi-open mobile grain heat pump dehumidifier, including a mobile frame and a dehumidification mechanism, the dehumidification mechanism is composed of a dehumidification box and a hot air unit, the dehumidification box is supported and fixed on the mobile frame, the dehumidification box is composed of an outer box plate, an inner box plate and an end plate, the outer box plate and the inner box plate are mutually fitted, and a sandwich ventilation chamber is formed in the middle, the front and rear ends of the sandwich ventilation chamber are blocked by the end plates, and the outer box plate, the inner box plate and the end plate cooperate to form a complete semi-open dehumidification grain The dehumidifier has a sieve hole on the surface of the inner box plate, and the sieve hole is connected to the interlayer ventilation chamber; the hot air unit includes a fan and an air source heat pump installed on the mobile frame, the fan is installed on the air source heat pump, the output port of the fan is connected to the branch air duct, and a uniform air supply hood connected to the interlayer ventilation chamber is arranged on the left and right sides of the dehumidifier box, and the branch air duct is connected to the air inlet of the uniform air supply hood through the air supply ducts on the left and right sides, and the branch air duct sends the hot air into the interlayer ventilation chamber through the air supply duct and the uniform air supply hood respectively; A screw conveyor and a screw agitator are installed in the dehumidification box. A discharge trough is axially opened at the inner bottom of the inner box plate. The screw conveyor is matched and arranged in the discharge trough for unloading grain. The screw agitator is arranged above the screw conveyor and located within the range of the dehumidification grain bin for turning the grain. A driving mechanism for driving the screw conveyor and the screw agitator is arranged on the dehumidification box. A scraper assembly is also arranged in the dehumidification box.

[0006] Furthermore, the spiral agitator includes a main shaft rotatably mounted in the dehumidified grain bin through a bearing, a spiral blade spirally wrapped around the main shaft, and the spiral blade is supported and fixed on the main shaft through a supporting rod.

[0007] Furthermore, the scraper assembly includes a sliding rod arranged in parallel on the left and right sides above the dehumidification box, and a plurality of grain-scraping arc plates are slidably mounted on the sliding rod at equal intervals, the position of the grain-scraping arc plate corresponds to the position of each spiral segment on the spiral blade of the spiral agitator, and the bottom of the grain-scraping arc plate is in matching contact with the inner wall of the dehumidification grain bin, a push column is vertically fixed on the grain-scraping arc plate, and the push column is in contact with the closest spiral segment, when the spiral blade rotates, each spiral segment will apply thrust to the corresponding push column to push the grain-scraping arc plate to move, and a notch is also provided on each spiral segment of the spiral blade to allow the push column to pass through; The grain scraping arc plate is slidably mounted on the sliding rod through sliding blocks at both ends, and adjacent grain scraping arc plates are fixedly connected by a transfer rod. Springs are fixedly mounted on both ends of the sliding rod, the outer ends of the springs are connected to the front and rear end plates, and the inner ends are connected to the outermost sliding blocks.

[0008] Furthermore, the bottom center position of the grain scraping arc plate is set as an upper convex part to provide an escape space for the spiral blade, and the push column is vertically fixed on the upper convex part.

[0009] Furthermore, the driving mechanism includes an agitator motor installed at the end of the dehumidifier box, and a conveyor motor installed on the mobile frame. The output shaft of the agitator motor is connected to the power shaft of the spiral agitator. The output shaft of the conveyor motor and the power shaft of the spiral conveyor are both fixedly mounted with pulleys. The output shaft of the conveyor motor is connected to the spiral conveyor through a belt on the pulley.

[0010] Furthermore, the driving mechanism includes a main motor installed at the end of the dehumidification box, the main motor is connected to the power shaft of the spiral agitator, and a transmission is installed at the same end of the dehumidification box. The input shaft of the transmission is connected to the main motor through a second belt transmission, and a main gear and a slave gear that mesh with each other are fixedly mounted on the output shaft of the transmission and the power shaft of the screw conveyor respectively. The screw conveyor and the spiral agitator can achieve reverse rotation through the meshing effect of the gears.

[0011] Furthermore, a screen is installed in the interlayer ventilation chamber, and the screen is in contact with the lower wall of the inner box plate to block the screen holes, and the screen holes can be set to different apertures.

[0012] Furthermore, the mobile frame includes a frame plate, and four running wheels are installed on both sides of the frame plate in a rectangular arrangement. A traction head is fixed to the front end of the frame plate, and the dehumidifier can be moved by traction head.

[0013] Furthermore, a grain unloading pipe is connected to the rear end of the inner box plate at a position corresponding to the unloading chute, the rear end of the screw conveyor extends into the grain unloading pipe, and a grain unloading bin door is arranged at the bottom of the grain unloading pipe.

[0014] Furthermore, a humidity sensor is installed in the dehumidification box, and a temperature sensor is installed at the connection between the air source heat pump and the fan. The air source heat pump adjusts the dehumidification parameters according to the monitoring results of the humidity sensor and the temperature sensor.

[0015] The beneficial effects of the present invention are as follows: the dehumidifier is installed on a mobile frame and can be moved by walking wheels, so it is convenient to carry out grain dehumidification operations in different locations, solving the problem of inconvenient movement of fixed heat pump dryers; the half-open design of the dehumidification granary accelerates the dissipation of waste gas in the grains, and the ventilation screens inside the granary are designed with different apertures, which can optimize air flow and ensure that hot air evenly passes through the grain layer, preventing the lower layer of grain from being overheated and bursting, thereby improving dehumidification efficiency and reducing energy consumption; By setting up a spiral agitator, the grains can be continuously turned during the dehumidification process, which not only prevents the grains from piling up at the bottom of the granary, but also ensures sufficient contact between the hot air and the grains, thereby improving the dehumidification efficiency and uniformity. The turning action of the spiral agitator also helps to reduce the friction between the grains, reduce the breakage rate, and protect the integrity of the grains; the dehumidified grains can be quickly pushed out and collected by the screw conveyor, which simplifies the unloading process, improves the working efficiency, and also reduces the breakage and contamination of the grains during the unloading process; By arranging a scraper assembly in the dehumidification grain bin, the spiral stirrer can drive the grain scraper arc plate to move in the dehumidification grain bin through the cooperation of the spiral blade and the grain scraper arc plate while stirring the grain and cooperating with the slide rod, spring and other structures to realize the back and forth reciprocating movement of the grain scraper arc plate in the dehumidification grain bin, and then the grain scraper arc plate scrapes the grain away from the sieve hole, thereby improving the air supply effect of the sieve hole and further improving the grain dehumidification efficiency; The dehumidifier provided by the present invention improves dehumidification efficiency, reduces energy consumption, and is environmentally friendly through innovative design and technical integration of major components such as the overall structure design, air supply and exhaust system, automatic feeding and discharging system, mobile chassis, and material turning device. It is suitable for use in farms of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is one of the structural schematic diagrams of the dehumidification mechanism of the present invention; Figure 3 It is a schematic diagram of the structure of the dehumidification box of the present invention; Figure 4 It is a schematic diagram of the frame structure of the present invention; Figure 5 It is a schematic diagram of the structure of the spiral stirrer of the present invention; Figure 6 It is a schematic diagram of the driving mechanism structure of the present invention; Figure 7 It is a schematic diagram of the front cross-sectional structure of the dehumidification box of the present invention; Figure 8 This is the second structural schematic diagram of the dehumidification mechanism of the present invention; Fig. 9 It is a side cross-sectional structural schematic diagram of the present invention; Fig.10 It is a schematic diagram of the cooperation structure of the scraper assembly and the spiral agitator of the present invention; Fig.11 This is a control system diagram of the present invention.

[0017] In the figure: 1. Mobile frame; 11. Frame plate; 12. Traction head; 13. Support pad; 14. Travel wheel; 2. Dehumidification box; 21. Outer box plate; 22. Inner box plate; 23. Discharge chute; 24. Screen; 25. Screen hole; 26. End plate; 27. Grain discharge pipe; 28. Grain discharge bin door; 3. Hot air unit; 31. Air distribution pipe; 32. Air supply pipe; 33. Fan; 34. Air source heat pump; 35. Uniform air supply hood; 4. Screw conveyor; 5. Screw agitator; 51. Power shaft ; 52. spiral blade; 53. supporting rod; 54. notch; 6. driving mechanism; 61. agitator motor; 62. conveyor motor; 63. belt one; 64. main motor; 65. transmission; 66. belt two; 67. main gear; 68. slave gear; 7. fan blade; 8. scraper assembly; 81. grain scraper plate; 82. upper convex part; 83. push column; 84. slide rod; 85. spring; 86. transmission rod; 87. sliding block; 88. shielding cover plate; 9. humidity sensor. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] See also Figure 1-11 , the present invention provides a technical solution of a semi-open mobile grain heat pump dehumidifier: Example

[0020] according to Figure 1 As shown, the dehumidifier includes a mobile frame 1 and a dehumidification mechanism above. The mobile frame 1 includes a frame plate 11. Four running wheels 14 are arranged in a rectangular shape on both sides of the frame plate 11. A traction head 12 is fixed to the front end of the frame plate 11, and the dehumidifier can be moved by traction head 12. The dehumidification mechanism includes a dehumidification box 2 and a hot air unit 3. A support pad 13 is installed above the frame plate 11. The dehumidification box 2 is supported and fixed on the support pad 13. The structure of the dehumidification box 2 is as shown in FIG. Figure 2 and Figure 3As shown, it is composed of an outer box plate 21, an inner box plate 22 and an end plate 26. The outer box plate 21 and the inner box plate 22 are arc plates and are fitted to each other, and a sandwich ventilation chamber is formed between the outer box plate 21 and the inner box plate 22. The front and rear ends of the sandwich ventilation chamber are blocked by the end plate 26. The outer box plate 21, the inner box plate 22 and the end plate 26 cooperate to form a complete semi-open dehumidification granary. The dehumidification granary is the main working area of ​​the dryer and is used to store grains to be dehumidified. Sieve holes 25 are opened on the surface of the inner box plate 22, and the sieve holes 25 are connected to the sandwich ventilation chamber. The hot air unit 3 includes a fan 33 and an air source heat pump 34 installed on the mobile frame 1. The air source heat pump 34 serves as the heat source of the dehumidifier. It uses the refrigerant to circulate between the evaporator, the compressor, the condenser and the expansion valve, absorbs heat from the surrounding environment and releases it in the condenser to generate hot air for drying grains. The fan 33 is installed on the air source heat pump 34. The output port of the fan 33 is connected to the air distribution pipe 31. The main function of the fan 33 is to force air to flow. The airflow is generated by the rotation of the impeller to generate the heat generated by the heat pump. The hot air is evenly sent to the air distribution duct 31, the left and right sides of the air distribution duct 31 are respectively connected to the air supply duct 32, and the left and right sides of the dehumidification box 2 are provided with a uniform air supply hood 35 connected to the interlayer ventilation chamber, the air outlet of the air supply duct 32 is connected to the air inlet of the uniform air supply hood 35, the air distribution duct 31 divides the hot air into two streams and sends them into the interlayer ventilation chamber through the air supply duct 32 and the uniform air supply hood 35 respectively, so as to realize uniform distribution of hot air, and the hot air in the interlayer ventilation chamber enters the dehumidification granary through the sieve hole 25 to dehumidify the grain.

[0021] A screen 24 is installed in the interlayer ventilation chamber. The screen 24 is in contact with the lower wall of the inner box plate 22 to block the screen holes 25 to prevent grain particles from falling into the interlayer ventilation chamber through the screen holes 25. The screen holes 25 can be set to different apertures to promote hot air circulation, prevent the lower layer of grain from overheating and bursting, and ensure uniform dehumidification of the grain.

[0022] By constructing a dehumidification silo in the grain dryer to provide space and place for dehumidification of wheat, the problem of rapid dehydration and dehumidification of grain can be solved; by constructing a mobile frame and integrating the dehumidification silo on the frame to form a movable wheat dehumidification platform, on the one hand, the mobility problem of the dryer can be solved, so that the dryer does not need to be installed in a specific location, thereby effectively solving the problems of existing grain drying equipment; on the other hand, the dehumidifier can be moved to any required position to meet the use needs of different farmers and solve the problem that existing grain drying equipment cannot be used on site. It is especially suitable for use by scattered farmers, so that scattered farmers do not need to use a drying method with a high mildew rate and unguaranteed quality to dry grain, thereby effectively reducing the loss of farmers' grain in the drying and storage process.

[0023] like Figure 2 and Figure 3As shown, a screw conveyor 4 and a screw agitator 5 are arranged in the dehumidification box 2, and bearings are installed on the front and rear end plates of the dehumidification box 2. Both ends of the power shafts of the screw conveyor 4 and the screw agitator 5 are rotatably mounted in the dehumidification box 2 through bearings. A discharge trough 23 is axially provided at the inner bottom of the inner box plate 22, and the screw conveyor 4 is matched and arranged in the discharge trough 23. A grain discharge pipe 27 is connected to the corresponding position of the discharge trough 23 at the rear end of the inner box plate 22, and the rear end of the screw conveyor 4 extends into the grain discharge pipe 27, and a grain discharge silo door 28 is arranged at the bottom of the grain discharge pipe 27. A through opening is provided on the rear end plate for the grain discharge pipe 27 to pass through, so that the grain discharge pipe 27 and the end plate 26 can be assembled in cooperation at the rear end of the dehumidification box 2; the screw agitator 5 is arranged above the screw conveyor 4 and is located within the range of the dehumidification silo, and is used to turn the grain, which can effectively stir the grain in the dehumidification silo to prevent the grain from agglomerating or being unevenly heated during the dehumidification process. The dehumidification box 2 is also provided with a driving mechanism 6 for driving the screw conveyor 4 and the screw stirrer 5 to operate. Figure 2 As shown, the driving mechanism 6 includes an agitator motor 61 installed at the end of the dehumidification box 2 through a motor frame and a conveyor motor 62 installed on the mobile frame 1. The output shaft of the agitator motor 61 is connected to the power shaft of the spiral agitator 5, which is used to control the spiral agitator 5 to rotate and stir the material. The output shaft of the conveyor motor 62 and the power shaft of the spiral conveyor 4 are fixedly mounted with pulleys. The output shaft of the conveyor motor 62 is connected to the spiral conveyor 4 through a belt 63 on the pulley. The conveyor motor 62 transmits power to the transmission 65, and the transmission 65 drives the spiral conveyor 4 to work and unload the dehumidified grain.

[0024] The specific structure of the spiral stirrer 5 is as follows: Figure 5 As shown, it includes a main shaft 51 that is rotatably mounted in the dehumidification granary through a bearing. The main shaft 51 is connected to a stirrer motor 61 and is responsible for transmitting the rotational power of the stirrer motor 61 to the entire stirring system. A spiral blade 52 is spirally wrapped around the main shaft 51, and the spiral blade 52 is supported and fixed on the main shaft 51 by evenly distributed support rods 53. The spiral blade 52 is connected to the support rod 53, and the support rod 53 is connected to the main shaft 51 to transmit the power transmitted from the main shaft 51 to the spiral blade 52 to achieve stirring of the material. Fan blades 7 can also be fixedly mounted at the front and rear ends of the main shaft 51. The fan blades 7 are close to the front and rear end plates of the dehumidification box 2. The spiral stirrer 5 can synchronously drive the fan blades 7 to rotate when starting the operation. The spiral blades 52 and the fan blades 7 are used to turn the grains to prevent the grains from agglomerating or being unevenly heated during the dehumidification process.

[0025] When the dehumidifier is running to dehumidify the grain, the agitator motor 61 starts to drive the spiral agitator 5 to rotate, and the spiral blades 52 on the spiral agitator 5 begin to stir the grain so that it is turned over and heated evenly. After the dehumidification is completed, the grain unloading device is started, and the conveyor motor 62 starts to transmit the generated power to the belt 63, and then the belt 63 drives the spiral conveyor 4 to work to unload the grain, and the grain is discharged from the grain unloading bin door 28, completing the entire conveying process.

[0026] When used specifically, the semi-open mobile grain heat pump dehumidifier of the present invention absorbs heat from the surrounding environment through the air source heat pump 34, releases heat in the condenser after being compressed by the compressor, and generates hot air. The hot air is evenly distributed to the right air supply pipe and the left air supply pipe through the air distribution pipe 31, and then sent to the interlayer ventilation room, and evenly passes through the grain layer placed in the dehumidification granary through the variable aperture ventilation sieve 25 to achieve dehumidification of the grain; at the same time, the agitator motor 61 drives the spiral agitator 5 to operate, and the grain is periodically turned over by the spiral agitator 5 to ensure that the hot air is fully in contact with the grain, and the dehumidification efficiency and uniformity are improved. After the dehumidification work is completed, the conveyor motor 62 drives the screw conveyor 4 to rotate through the belt 63, and the dehumidified grain is pushed out through the screw conveyor 4 and unloaded through the grain unloading silo door 28. The entire device is installed on the mobile frame 1, and is moved by the walking wheel 14, which is convenient for grain dehumidification operations in different locations. Example

[0027] Based on the first embodiment, the same points as the first embodiment will not be repeated here, and the differences are as follows: Figure 6 As shown, the driving mechanism 6 includes a main motor 64 installed at the end of the dehumidification box 2, and the output shaft of the main motor 64 is connected to the power shaft 51 of the spiral agitator 5 to directly control the operation of the spiral agitator 5, and a transmission 65 is installed at the same end of the dehumidification box 2, and the input shaft of the transmission 65 and the output shaft of the main motor 64 are fixedly mounted with pulleys, and the transmission 65 and the main motor 64 are connected through a belt 66 on the pulley, and a main gear 67 and a slave gear 68 are fixedly mounted on the output shaft of the transmission 65 and the power shaft of the screw conveyor 4, respectively, and the main gear 67 and the slave gear 68 are meshed with each other, and the output end of the transmission 65 realizes the driving of the screw conveyor 4 through the meshing effect of the gears.

[0028] When used specifically, the semi-open mobile grain heat pump dehumidifier of the present invention is as follows: Figure 7As shown, during the dehumidification process, the main motor 64 drives the spiral agitator 5 to rotate to turn the grains, and at the same time, the power transmission of the belt 2 66 drives the transmission 65 to start, and the transmission 65 controls the screw conveyor 4 to rotate synchronously with the spiral agitator 5 through the meshing effect of the main gear 67 and the slave gear 68, and the two gears are engaged to transmit power so that the screw conveyor 4 and the spiral agitator 5 can rotate in opposite directions. The screw conveyor 4 rotates at the bottom of the dehumidification granary to guide the grain at the bottom to one end, and the spiral agitator 5 rotates in the middle and above the dehumidification granary to guide the grain in the middle and above to the other end. Through the reverse guidance and cooperation of the screw conveyor 4 and the spiral agitator 5, the continuous turning effect of the grain in the dehumidification granary from the bottom to the top can be achieved, further improving the uniformity of grain dehumidification.

[0029] When grain needs to be unloaded, the speed between the screw conveyor 4 and the screw agitator 5 can be adjusted by controlling the transmission ratio of the transmission 65, so that the rotation speed of the screw conveyor 4 is greater than the rotation speed of the screw agitator 5, and the unloading work can be completed by the screw conveyor 4. In addition, the driving operation of the screw conveyor 4 and the screw agitator 5 is realized by one motor, which effectively reduces the cost and energy consumption of the device. Example

[0030] On the basis of the first embodiment, when grain is placed in the dehumidification granary and is being dehumidified, the grain will block the sieve hole 25 at the bottom of the dehumidification box 2, resulting in poor ventilation effect of the sieve hole 25. In order to solve this problem, Figure 8 and Fig. 9 As shown, a scraper assembly 8 is provided in the dehumidification box 2 .

[0031] The scraper assembly 8 includes a slide bar 84, which is arranged parallel to the left and right sides of the dehumidification box 2, and the two ends are fixed to the front and rear end plates. A plurality of grain scraping arc plates 81 are slidably mounted on the slide bar 84 at equal intervals. The specific structure of the grain scraping arc plates 81 is as follows: Fig.10 As shown, the grain scraping arc plate 81 is in matching contact with the inner wall of the dehumidifying grain bin, and the bottom center position of the grain scraping arc plate 81 is set as an upper protrusion 82, which is used to provide an avoidance space for the spiral blade 52, and sliding blocks 87 are set on both sides of the upper end of the grain scraping arc plate 81, and the grain scraping arc plate 81 is slidably mounted on the sliding rod 84 through the sliding blocks 87, and the adjacent grain scraping arc plates 81 are fixedly connected by a transfer rod 86, and springs 85 are fixedly mounted on both ends of the sliding rod 84, and the outer end of the spring 85 is connected to the front and rear end plates, and the inner end is connected to the outermost sliding block 87; the position of the grain scraping arc plate 81 corresponds to the position of each spiral segment on the spiral blade 52, and a push column 83 is vertically fixed on the upper protrusion 82 of the grain scraping arc plate 81, and the push column 83 is in contact with the closest spiral segment, and a notch 54 is also opened on each spiral segment of the spiral blade 52, and the notch 54 matches the push column 83, and the push column 83 can pass through the notch 54 smoothly.

[0032] When used specifically, the present invention is a semi-open mobile grain heat pump dehumidifier. When the spiral agitator 5 is driven to operate, the spiral blade 52 rotates. Due to its spiral structure, each spiral segment will apply thrust to the corresponding push column 83, thereby pushing the grain scraping arc plate 81 to move forward. When moving, the grain scraping arc plate 81 can scrape the grain at the bottom of the dehumidification grain bin, so that the grain is temporarily removed from the sieve hole 25. In this process, the front spring 85 is in a compressed state, and the rear spring 85 is in a stretched state. The springs 85 at both ends are in an energy storage state; when the spiral blade 52 rotates to the point where the notch 54 on it is aligned with the push column 83 When the grain scraper arc plate 81 reaches the corresponding position, the thrust exerted by the spiral blade 52 on the grain scraper arc plate 81 through the push column 83 disappears, and the elastic force of the spring 85 pulls the grain scraper arc plate 81 backward. At this time, the push column 83 passes through the notch 54, and the grain scraper arc plate 81 moves backward to return to its original position and contacts the next spiral segment, and is again driven forward by the next threaded segment. Through the cooperation between the above-mentioned structural actions, the grain scraper arc plate 81 performs reciprocating motion back and forth, and then the grain at the bottom of the dehumidification granary is pushed to move through the forward and backward movement of the grain scraper arc plate 81, thereby improving the ventilation effect of the sieve hole 25 and further improving the efficiency of grain dehumidification. Example

[0033] On the basis of the first embodiment, a humidity sensor 9 is installed in the dehumidification box 2, and a temperature sensor is installed at the connection between the air source heat pump 34 and the fan 33. The humidity sensor 9 monitors the humidity of the grain in the dehumidified granary and transmits the monitoring result to the controller. The controller controls the air volume of the fan 33 according to the monitoring result. The temperature sensor monitors the temperature of the hot air generated by the air source heat pump 34 and transmits the monitoring result to the controller. The controller regulates the temperature of the hot air generated by the air source heat pump 34 according to the monitoring result of the temperature sensor. The air source heat pump can adapt to the dehumidification requirements of grains of different types and humidity by adjusting the dehumidification parameters such as temperature, humidity and air volume, and the controller adjusts the speed of the motor by monitoring the temperature and humidity, and then adjusts the speed of the spiral agitator 5 and the spiral conveyor 4. This highly adaptable design makes the dryer not only suitable for wheat, but also for the dehumidification of various grains such as corn and rice, and has a wide range of application prospects.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A semi-open mobile grain heat pump dehumidifier, comprising a mobile frame (1) and a dehumidification mechanism, wherein the dehumidification mechanism is composed of a dehumidification box (2) and a hot air unit (3), and the dehumidification box (2) is supported and fixed on the mobile frame (1), characterized in that: The dehumidification box (2) is composed of an outer box plate (21), an inner box plate (22) and an end plate (26). The outer box plate (21) and the inner box plate (22) are mutually fitted to form a sandwich ventilation chamber in the middle. The front and rear ends of the sandwich ventilation chamber are blocked by the end plate (26). The outer box plate (21), the inner box plate (22) and the end plate (26) cooperate to form a complete semi-open dehumidification granary. The surface of the inner box plate (22) is provided with a sieve hole (25), and the sieve hole (25) is connected to the sandwich ventilation chamber. The hot air unit (3) includes a mobile A fan (33) and an air source heat pump (34) are mounted on the vehicle frame (1); the fan (33) is mounted on the air source heat pump (34); an output port of the fan (33) is connected to an air distribution pipe (31); a uniform air supply hood (35) connected to the interlayer ventilation chamber is arranged on the left and right sides of the dehumidification box (2); the air distribution pipe (31) is connected to an air inlet of the uniform air supply hood (35) through air supply pipes (32) on the left and right sides; the air distribution pipe (31) supplies hot air into the interlayer ventilation chamber through the air supply pipe (32) and the uniform air supply hood (35); A screw conveyor (4) and a screw stirrer (5) are installed in the dehumidification box (2); a discharge trough (23) is axially opened at the inner bottom of the inner box plate (22); the screw conveyor (4) is matched and arranged in the discharge trough (23) for unloading grain; the screw stirrer (5) is arranged above the screw conveyor (4) and within the range of the dehumidification grain bin for turning the grain; a driving mechanism (6) for driving the screw conveyor (4) and the screw stirrer (5) to operate is arranged on the dehumidification box (2); and a scraper assembly (8) is also arranged in the dehumidification box (2).

2. A semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: The spiral stirrer (5) comprises a main shaft (51) rotatably mounted in the dehumidifying grain bin via a bearing, a spiral blade (52) spirally surrounding the main shaft (51), and the spiral blade (52) is supported and fixed on the main shaft (51) via a supporting connecting rod (53).

3. A semi-open mobile grain heat pump dehumidifier according to claim 1 or 2, characterized in that: The scraper assembly (8) includes a slide bar (84) arranged in parallel on the left and right sides above the dehumidification box (2), and a plurality of grain scraping arc plates (81) are slidably mounted on the slide bar (84) at equal intervals. The position of the grain scraping arc plate (81) corresponds to the position of each spiral segment on the spiral blade (52) of the spiral agitator (5), and the bottom of the grain scraping arc plate (81) is in matching contact with the inner wall of the dehumidification grain bin. A push column (83) is vertically fixed on the grain scraping arc plate (81), and the push column (83) is in contact with the closest spiral segment. When the spiral blade (52) rotates, each spiral segment will apply thrust to the corresponding push column (83) to push the grain scraping arc plate (81) to move. A notch (54) is also provided on each spiral segment of the spiral blade (52) to allow the push column (83) to pass through. The grain scraping arc plates (81) are slidably mounted on the slide bars (84) via sliding blocks (87) at both ends, and adjacent grain scraping arc plates (81) are fixedly connected via transfer rods (86). Springs (85) are fixedly mounted on both ends of the slide bars (84), and the outer ends of the springs (85) are connected to the front and rear end plates, and the inner ends are connected to the outermost sliding blocks (87).

4. A semi-open mobile grain heat pump dehumidifier according to claim 3, characterized in that: The center position of the bottom of the grain scraping arc plate (81) is arranged as an upper convex portion (82) for providing an escape space for the spiral blade (52), and the push column (83) is vertically fixed on the upper convex portion (82).

5. A semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: The driving mechanism (6) comprises an agitator motor (61) mounted at the end of the dehumidifier box (2), and a conveyor motor (62) mounted on the movable frame (1); the output shaft of the agitator motor (61) is connected to the power shaft of the spiral agitator (5); the output shaft of the conveyor motor (62) and the power shaft of the spiral conveyor (4) are both fixedly mounted with pulleys; the output shaft of the conveyor motor (62) is connected to the spiral conveyor (4) through a belt 1 (63) on the pulley.

6. A semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: The driving mechanism (6) comprises a main motor (64) mounted at the end of the dehumidification box (2), the main motor (64) being connected to the power shaft (51) of the spiral stirrer (5), a transmission (65) being mounted at the same end of the dehumidification box (2), the input shaft of the transmission (65) being connected to the main motor (64) via a second belt (66), and a main gear (67) and a slave gear (68) meshing with each other being fixedly mounted on the output shaft of the transmission (65) and the power shaft of the spiral conveyor (4), respectively, so that the spiral conveyor (4) and the spiral stirrer (5) can achieve reverse rotation through the meshing effect of the gears.

7. A semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: A screen (24) is installed in the interlayer ventilation chamber. The screen (24) is in contact with the lower wall of the inner box plate (22) and is used to block the screen holes (25). The screen holes (25) can be set to have different apertures.

8. The semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: The mobile frame (1) comprises a frame plate (11), four running wheels (14) are mounted on both sides of the frame plate (11) in a rectangular arrangement, a traction head (12) is fixed to the front end of the frame plate (11), and the dehumidifier can be moved by traction head (12).

9. A semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: A grain unloading pipe (27) is connected to a position corresponding to the unloading chute (23) at the rear end of the inner box plate (22), the rear end of the screw conveyor (4) extends into the grain unloading pipe (27), and a grain unloading bin door (28) is provided at the bottom of the grain unloading pipe (27).

10. The semi-open mobile grain heat pump dehumidifier according to claim 1, characterized in that: A humidity sensor (9) is installed in the dehumidification box (2), and a temperature sensor is installed at the connection between the air source heat pump (34) and the fan (33). The air source heat pump (34) adjusts the dehumidification parameters according to the monitoring results of the humidity sensor (9) and the temperature sensor.

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