Movable heat pump grain dryer

Abstract

This invention relates to the field of grain drying technology and discloses a portable heat pump grain dryer, including a base. A drying assembly is mounted on the top of the base. The drying assembly includes a receiving hopper, the bottom of which is fixedly connected to the top of the base. Sleeves are evenly installed inside the receiving hopper, and a piston is slidably connected inside the sleeves. A movable rod is fixedly connected to the top of the piston, and a drying tank is fixedly connected to the top of multiple movable rods. A spring is fixedly connected between the top of the piston and the inner wall of the top of the sleeve. A spiral hopper is fixedly connected to the inner wall of the drying tank. Through pump operation, hot air is evenly distributed to each set of branch pipes. Air nozzles at the top of the branch pipes blow the hot air evenly into the spiral hopper of the drying tank. The drying tank is in a reciprocating vibration state, causing the grain inside the spiral hopper to continuously tumble, ensuring full contact between the hot air and the grain, achieving rapid and uniform drying.

Description

Technical Field

[0001] This invention relates to the field of grain drying technology, specifically a portable heat pump grain dryer. Background Technology

[0002] If grain is not dried in a timely and effective manner after harvest, it is very easy for it to become moldy and sprout due to excessive moisture content, resulting in a double loss of grain yield and quality. This directly affects the safety of grain storage and the economic benefits of growers. Grain drying is a key link in the post-harvest storage and processing of grain, and it is directly related to grain safety and the effect of post-harvest loss reduction. Heat pump grain dryers have become one of the mainstream equipment for grain drying due to their energy-saving and stable drying effect.

[0003] In existing heat pump grain dryers, grain tends to accumulate in the drying chamber during the drying process, leading to uneven heating of the grain. This can result in insufficient drying of the bottom layer of grain and over-drying of the surface layer, resulting in inconsistent grain quality after drying. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a portable heat pump grain dryer, which solves the problem that in existing heat pump grain dryers, grain tends to accumulate in the drying chamber during the drying process, leading to uneven heating of the grain, insufficient drying of the bottom layer of grain and over-drying of the surface layer of grain, resulting in inconsistent quality and poor uniformity of the dried grain.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable heat pump grain dryer, comprising a base, a drying assembly on the top of the base, the drying assembly including a receiving hopper, the bottom of the receiving hopper being fixedly connected to the top of the base, sleeves uniformly installed inside the receiving hopper, a piston slidably connected inside the sleeves, a movable rod fixedly connected to the top of the piston, a drying tank fixedly connected to the top of multiple movable rods, a spring fixedly connected between the top of the piston and the inner wall of the top of the sleeve, a spiral hopper fixedly connected to the inner wall of the drying tank, multiple sets of branch pipes uniformly distributed and fixedly connected along the axial direction on the circumferential sidewall of the drying tank, a connecting pipe fixedly connected to one end of multiple branch pipes on the same plane, air nozzles symmetrically arranged on the top of the branch pipes, a combustion cylinder and a pump body sequentially installed on the top of the base, and a feeding assembly provided on the top of the base.

[0006] By adopting the above technical solution, the hot airflow generated by the combustion cylinder is extracted through the exhaust pipe and transported to the connecting pipe through the conveying pipe via the pump body operation. The connecting pipe evenly distributes the hot airflow to each group of branch pipes. The air nozzles at the top of the branch pipes blow the hot airflow evenly into the spiral hopper of the drying tank. The drying tank is in a state of up-and-down reciprocating vibration, which makes the grain in the spiral hopper constantly turn over. The hot airflow comes into full contact with the grain, achieving rapid and uniform drying, avoiding the problem of insufficient drying of the bottom grain and over-drying of the surface grain, and ensuring the consistency of grain quality after drying.

[0007] By adjusting the pump power to control the hot air delivery rate and air pressure, and by adjusting the speed of motor one to adjust the vibration frequency of the drying tank, the drying parameters can be flexibly adjusted according to the particle characteristics and initial moisture content of different grain varieties such as wheat, rice, and corn, to meet diverse grain drying needs and improve the applicability of the equipment.

[0008] Preferably, the pump body has an input end fixedly connected to an air extraction pipe, one end of which is fixedly connected to the outer wall of the combustion cylinder, and the pump body has an output end fixedly connected to a delivery pipe, one side of which is fixedly connected to the outer wall of a connecting pipe. The delivery pipe and the connecting pipe are connected in a continuous manner, and the other end of the branch pipe has a through hole.

[0009] Preferably, the top of the base is symmetrically equipped with support columns, and a motor is installed on the top of each of the two support columns. The output end of the motor is fixedly connected to a cam, and a horizontal plate is symmetrically fixedly connected to the outer wall of the drying tank. The circumferential surface of the cam is always in contact with the bottom of the horizontal plate.

[0010] Preferably, the feeding assembly includes a vertical plate, the bottom of which is fixedly connected to the top of the base, a cylinder is fixedly connected to the top of the vertical plate, an inclined plate is fixedly connected to one side of the vertical plate, a guide hopper is fixedly connected to one end of the inclined plate, a rotating rod is rotatably connected inside the guide hopper, one end of the rotating rod passes through the side wall of the guide hopper, and a gear is fixedly connected to the end of the rotating rod.

[0011] Preferably, the teeth of the gear are meshed with a rack, and the bottom of the rack is fixedly connected to the top of one of the cross plates.

[0012] Preferably, a rotating ring is fixedly connected to the outer wall of the rotating rod, and partitions are uniformly fixedly connected to the outer wall of the rotating ring, with the partitions disposed inside the guide hopper.

[0013] Preferably, a second motor is installed at one end of the cylinder, and a rotating shaft is fixedly connected to the output end of the second motor. A spiral conveying blade is fixedly connected to the outer wall of the rotating shaft.

[0014] Preferably, a feed hopper is fixedly connected to the outer wall of the cylinder, and a guide port is provided on one side of the cylinder.

[0015] Preferably, a discharge pipe is fixedly connected to one side of the receiving hopper.

[0016] Preferably, the bottom of the base is uniformly and fixedly connected with mounting seats, the mounting seats are rotatably connected with movable wheels, and a tow hook is fixedly connected to one side of the base.

[0017] Working principle: During use, the grain to be dried is fed into the cylinder through the feed hopper. The second motor is started, which causes the rotating shaft to drive the spiral conveyor blades to rotate. The spiral conveyor blades convey the grain in the cylinder along the axial direction and drop it into the guide hopper through the guide port, completing the initial feeding. At the same time, the first motor is started, which drives the cam to rotate. The eccentric structure of the cam pushes the horizontal plate, and the piston slides up and down along the sleeve. The first spring is stretched or contracted, which in turn realizes the up and down reciprocating motion of the drying tank through the movable rod. When the horizontal plate moves up and down, it will drive the rack at the top of it to move up and down synchronously. The rack and gear mesh and drive the gear to drive the rotating rod, rotating ring and partition to rotate. Through the rotation of the partition, the grain in the guide hopper is quantitatively and evenly fed into the spiral hopper of the drying tank, so that the feeding rate is linked and matched with the drying rhythm.

[0018] When the pump is started, the combustion cylinder generates hot airflow, which is drawn through the extraction pipe and transported to the connecting pipe through the delivery pipe. The connecting pipe evenly distributes the hot airflow to each group of branch pipes. The air nozzles at the top of the branch pipes blow the hot airflow evenly into the spiral hopper of the drying tank. The drying tank is in a state of up-and-down reciprocating vibration, which makes the grain in the spiral hopper constantly turn over, and the hot airflow comes into full contact with the grain, so that the grain can be dried quickly and evenly.

[0019] The through hole at the other end of the branch pipe has the air nozzle opening facing upwards. If grain falls into the branch pipe through the air nozzle opening during the drying process, the high-pressure hot airflow continuously flowing in the branch pipe can directly blow the grain out through the through hole.

[0020] After being fully dried, the grain slides down the spiral hopper into the receiving hopper at the bottom. The discharge pipe on the side wall of the receiving hopper can discharge the dried grain in a concentrated manner, thus completing the entire drying process.

[0021] The base has a rotatable caster connected to the mounting base at the bottom, which, together with the tow hook on one side of the base, allows the entire dryer to move flexibly.

[0022] This invention provides a portable heat pump grain dryer. It has the following beneficial effects:

[0023] 1. In this invention, the hot airflow generated by the combustion cylinder is drawn through the extraction pipe by the pump body and transported to the connecting pipe through the conveying pipe. The connecting pipe evenly distributes the hot airflow to each group of branch pipes. The air nozzles at the top of the branch pipes blow the hot airflow evenly into the spiral hopper of the drying tank. The drying tank is in a state of up-and-down reciprocating vibration, which makes the grain in the spiral hopper constantly turn over. The hot airflow comes into full contact with the grain, achieving rapid and uniform drying. This avoids the problem of insufficient drying of the bottom grain and over-drying of the surface grain, ensuring the consistency of grain quality after drying.

[0024] 2. This invention controls the delivery rate and air pressure of the hot airflow by adjusting the pump power, and adjusts the vibration frequency of the drying tank by adjusting the speed of the motor. It can flexibly adjust the drying parameters according to the particle characteristics and initial moisture content of different grain varieties such as wheat, rice, and corn, to meet diverse grain drying needs and improve the applicability of the equipment.

[0025] 3. In this invention, a motor drives a cam to rotate, which pushes a horizontal plate to make the drying tank move up and down. The horizontal plate synchronously drives a rack to move up and down. The rack meshes with a gear, which in turn drives a rotating rod, a rotating ring, and a partition plate to rotate. The rotation of the partition plate quantitatively and evenly feeds the grain in the feed hopper into the spiral hopper of the drying tank, achieving a linkage and matching between the feeding rate and the drying rhythm. This prevents the grain from accumulating in the drying tank due to excessive feeding, resulting in insufficient drying, and also prevents the equipment from idling and wasting energy due to excessive feeding, ensuring that the drying operation is always in a highly efficient and adaptable state.

[0026] 4. In this invention, the circumferential sidewall of the drying tank is uniformly distributed and fixedly connected with multiple sets of branch pipes along the axial direction. Combined with the uniform flow distribution design of the connecting pipe and the air nozzle, the hot airflow can be evenly distributed in all areas of the spiral hopper, with no dead zones of hot air. This allows the hot airflow generated by the combustion cylinder to be fully utilized, reducing the loss in the heat energy transmission and distribution process, and making it more energy-efficient than traditional drying equipment. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a partial structural diagram of the base of the present invention;

[0029] Figure 3 This is a partial structural diagram of the drying tank of the present invention;

[0030] Figure 4 This is a schematic diagram of a partial structure of the cylindrical body of the present invention;

[0031] Figure 5 This is a partial structural diagram of the combustion cylinder of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the drying tank of the present invention;

[0033] Figure 7 This is a schematic diagram of a partial structure of the connecting pipe of the present invention;

[0034] Figure 8 This is a partial structural diagram of the receiving hopper of the present invention;

[0035] Figure 9 for Figure 3 A magnified structural diagram at point A;

[0036] Figure 10 for Figure 6 A magnified structural diagram at point B.

[0037] The components include: 1. Base; 2. Drying assembly; 201. Feeding hopper; 202. Discharge pipe; 203. Sleeve; 204. Piston; 205. Movable rod; 206. Spring 1; 207. Drying tank; 208. Spiral hopper; 209. Connecting pipe; 210. Branch pipe; 211. Air nozzle; 212. Through hole; 213. Combustion cylinder; 214. Pump body; 215. Suction pipe; 216. Support column; 217. Motor 1. 218. Cam; 219. Horizontal plate; 220. Conveying pipe; 3. Feeding assembly; 301. Vertical plate; 302. Cylinder; 303. Motor II; 304. Spiral conveyor blades; 305. Guide port; 306. Feed hopper; 307. Inclined plate; 308. Guide hopper; 309. Rotating rod; 310. Rotating ring; 311. Partition plate; 312. Gear; 313. Rack; 4. Mounting base; 5. Moving wheel; 6. Towing hook. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see the appendix Figure 1 -Appendix Figure 10This invention provides a portable heat pump grain dryer, including a base 1. A drying assembly 2 is disposed on the top of the base 1. The drying assembly 2 includes a receiving hopper 201, the bottom of which is fixedly connected to the top of the base 1. Sleeves 203 are evenly installed inside the receiving hopper 201. A piston 204 is slidably connected inside the sleeve 203. A movable rod 205 is fixedly connected to the top of the piston 204. A drying tank 207 is fixedly connected to the top of the multiple movable rods 205. A spring 206 is fixedly connected between the top and the inner wall of the top of the sleeve 203. A spiral hopper 208 is fixedly connected to the inner wall of the drying tank 207. Multiple sets of branch pipes 210 are evenly distributed and fixedly connected along the axial direction on the circumferential side wall of the drying tank 207. One end of the multiple branch pipes 210 on the same plane is fixedly connected to a connecting pipe 209. Air nozzles 211 are symmetrically arranged on the top of the branch pipes 210. A combustion cylinder 213 and a pump body 214 are installed sequentially on the top of the base 1. A feeding assembly 3 is provided on the top of the base 1.

[0040] Specifically, the pump body 214 is started, and the combustion cylinder 213 generates hot airflow which is drawn through the extraction pipe 215 and transported to the connecting pipe 209 through the conveying pipe 220. The connecting pipe 209 evenly distributes the hot airflow to each group of branch pipes 210. The air nozzles 211 at the top of the branch pipes 210 blow the hot airflow evenly into the spiral hopper 208 of the drying tank 207. The drying tank 207 is in a state of up-and-down reciprocating vibration, which makes the grain in the spiral hopper 208 constantly turn over. The hot airflow comes into full contact with the grain, achieving rapid and uniform drying, avoiding the problem of insufficient drying of the bottom grain and over-drying of the surface grain, and ensuring the consistency of grain quality after drying.

[0041] The circumferential sidewall of the drying tank 207 is evenly distributed and fixedly connected with multiple sets of branch pipes 210 along the axial direction. Combined with the uniform flow distribution design of the connecting pipe 209 and the air nozzle 211, the hot air flow can be evenly distributed in all areas of the spiral hopper 208, with no dead zones of hot air. This allows the hot air flow generated by the combustion cylinder 213 to be fully utilized, reducing the loss in the heat energy transmission and distribution process, and making it more energy-efficient than traditional drying equipment.

[0042] By adjusting the power of pump body 214 to control the delivery rate and air pressure of hot airflow, and by adjusting the speed of motor 217 to adjust the vibration frequency of drying tank 207, the drying parameters can be flexibly adjusted according to the particle characteristics and initial moisture content of different grain varieties such as wheat, rice, and corn, to meet diverse grain drying needs and improve the applicability of the equipment.

[0043] Please see the appendix Figure 1 -Appendix Figure 3 , Figure 5The pump body 214 has an input end fixedly connected to a suction pipe 215, one end of which is fixedly connected to the outer wall of the combustion cylinder 213. The pump body 214 has an output end fixedly connected to a conveying pipe 220, one side of which is fixedly connected to the outer wall of a connecting pipe 209. The conveying pipe 220 and the connecting pipe 209 are connected. The other end of the branch pipe 210 has a through hole 212. Support columns 216 are symmetrically installed on the top of the base 1. Motor 217 is installed on the top of each of the two support columns 216. A cam 218 is fixedly connected to the output end of the motor 217. A horizontal plate 219 is symmetrically fixedly connected to the outer wall of the drying tank 207. The circumferential surface of the cam 218 is always in contact with the bottom of the horizontal plate 219.

[0044] Specifically, the pump body 214 is started, and the combustion cylinder 213 generates hot airflow which is drawn through the extraction pipe 215 and transported to the connecting pipe 209 through the conveying pipe 220. The connecting pipe 209 evenly distributes the hot airflow to each group of branch pipes 210. The air nozzles 211 at the top of the branch pipes 210 blow the hot airflow evenly into the spiral hopper 208 of the drying tank 207. The drying tank 207 is in a state of up-and-down reciprocating vibration, which makes the grain in the spiral hopper 208 constantly turn over. The hot airflow comes into full contact with the grain, achieving rapid and uniform drying, avoiding the problem of insufficient drying of the bottom grain and over-drying of the surface grain, and ensuring the consistency of grain quality after drying.

[0045] The through hole 212 at the other end of the branch pipe 210 has the air nozzle 211 opening upwards. If grain falls into the branch pipe 210 through the air nozzle 211 opening during the drying process, the high-pressure hot airflow continuously flowing in the branch pipe 210 can directly blow the grain out through the through hole 212. This avoids the problem of pipeline blockage caused by the accumulation of grain in the branch pipe 210 from the root, and ensures the smoothness of hot airflow and the continuity of drying operation.

[0046] Please see the appendix Figure 1 -Appendix Figure 4 Appendix Figure 9The feeding assembly 3 includes a vertical plate 301, the bottom of which is fixedly connected to the top of the base 1. A cylinder 302 is fixedly connected to the top of the vertical plate 301. An inclined plate 307 is fixedly connected to one side of the vertical plate 301. A guide hopper 308 is fixedly connected to one end of the inclined plate 307. A rotating rod 309 is rotatably connected inside the guide hopper 308. One end of the rotating rod 309 passes through the side wall of the guide hopper 308. A gear 312 is fixedly connected to the end of the rotating rod 309. A rack 313 is meshed with the tooth end of the gear 312. The bottom of 3 is fixedly connected to the top of one of the horizontal plates 219. A rotating ring 310 is fixedly connected to the outer wall of the rotating rod 309. A partition plate 311 is evenly fixedly connected to the outer wall of the rotating ring 310. The partition plate 311 is set in the guide hopper 308. A motor 303 is installed at one end of the cylinder 302. A rotating shaft is fixedly connected to the output end of the motor 303. A spiral conveying blade 304 is fixedly connected to the outer wall of the rotating shaft. A feed hopper 306 is fixedly connected to the outer wall of the cylinder 302. A guide port 305 is opened on one side of the cylinder 302.

[0047] Specifically, the grain to be dried is fed into the cylinder 302 through the feed hopper 306. Motor 2 is started, causing the rotating shaft to drive the spiral conveyor blades 304 to rotate. The spiral conveyor blades 304 convey the grain in the cylinder 302 axially, allowing it to fall into the guide hopper 308 through the guide port 305, completing the initial feeding. Simultaneously, motor 1 is started, driving cam 218 to rotate. The eccentric structure of cam 218 pushes the horizontal plate 219, causing piston 204 to slide up and down along sleeve 203. Spring 1 206 is stretched or contracted, thereby achieving the reciprocating up and down movement of the drying tank 207 via movable rod 205. When the 19 moves up and down, it will synchronously drive the rack 313 at the top to move up and down. The rack 313 meshes with the gear 312, which in turn drives the rotating rod 309, the rotating ring 310 and the partition 311 to rotate. Through the rotation of the partition 311, the grain in the guide hopper 308 is quantitatively and evenly fed into the spiral hopper 208 of the drying tank 207. This achieves linkage matching between the feeding rate and the drying rhythm. It will not cause the grain to accumulate in the drying tank 207 due to feeding too fast, resulting in insufficient drying, nor will it cause the equipment to run idle and waste energy due to feeding too slow. This keeps the drying operation in a state of high efficiency and adaptability.

[0048] Please see the appendix Figure 1 Appendix Figure 7 Appendix Figure 8 A discharge pipe 202 is fixedly connected to one side of the receiving hopper 201.

[0049] Specifically, the dried grain slides down the spiral hopper 208 into the receiving hopper 201 at the bottom. The discharge pipe 202 on the side wall of the receiving hopper 201 can discharge the dried grain in a concentrated manner, avoiding the accumulation of grain in the receiving hopper 201 and causing blockage. This ensures that the operation process from drying to discharge is continuous and uninterrupted, and improves the overall drying efficiency.

[0050] Please see the appendix Figure 1 -Appendix Figure 3 Appendix Figure 5 The bottom of the base 1 is evenly and fixedly connected with mounting bases 4, and the interior of the mounting bases 4 is rotatably connected with casters 5. A tow hook 6 is fixedly connected to one side of the base 1.

[0051] Specifically, by setting up the mobile wheels 5, the dryer can be moved easily, freeing it from the limitations of fixed operations. It can be directly transferred to the grain harvesting site for drying operations, eliminating the need to transport large quantities of grain to fixed drying points, greatly reducing the manpower and material costs of grain transportation, and reducing losses during the grain transportation process.

[0052] By setting up the tow hook 6, the dryer can be quickly connected to traction equipment such as tractors and tricycles, enabling long-distance and efficient site transfer.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable heat pump grain dryer, comprising a base (1), characterized in that: A drying assembly (2) is provided on the top of the base (1). The drying assembly (2) includes a receiving hopper (201). The bottom of the receiving hopper (201) is fixedly connected to the top of the base (1). Sleeves (203) are evenly installed inside the receiving hopper (201). A piston (204) is slidably connected inside the sleeve (203). A movable rod (205) is fixedly connected to the top of the piston (204). A drying tank (207) is fixedly connected to the top of multiple movable rods (205). The top of the piston (204) and the top of the sleeve (203) are connected to each other. A spring (206) is fixedly connected between the inner walls of the drying tank (207). A spiral hopper (208) is fixedly connected to the inner wall of the drying tank (207). Multiple sets of branch pipes (210) are evenly distributed and fixedly connected along the axial direction on the circumferential side wall of the drying tank (207). A connecting pipe (209) is fixedly connected to one end of the multiple branch pipes (210) on the same plane. Air nozzles (211) are symmetrically arranged on the top of the branch pipes (210). A combustion cylinder (213) and a pump body (214) are installed sequentially on the top of the base (1). A feeding assembly (3) is arranged on the top of the base (1).

2. The portable heat pump grain dryer according to claim 1, characterized in that: The pump body (214) has an input end fixedly connected to an air extraction pipe (215), one end of which is fixedly connected to the outer wall of the combustion cylinder (213). The pump body (214) has an output end fixedly connected to a delivery pipe (220), one side of which is fixedly connected to the outer wall of a connecting pipe (209). The delivery pipe (220) and the connecting pipe (209) are connected in a continuous manner. The other end of the branch pipe (210) has a through hole (212).

3. A portable heat pump grain dryer according to claim 1, characterized in that: The base (1) is symmetrically equipped with support columns (216) on the top. Each of the two support columns (216) is equipped with a motor (217). The output end of the motor (217) is fixedly connected to a cam (218). The outer wall of the drying tank (207) is symmetrically fixedly connected with a horizontal plate (219). The circumferential surface of the cam (218) is always in contact with the bottom of the horizontal plate (219).

4. A portable heat pump grain dryer according to claim 1, characterized in that: The feeding assembly (3) includes a vertical plate (301), the bottom of which is fixedly connected to the top of the base (1), a cylinder (302) is fixedly connected to the top of the vertical plate (301), an inclined plate (307) is fixedly connected to one side of the vertical plate (301), a guide hopper (308) is fixedly connected to one end of the inclined plate (307), a rotating rod (309) is rotatably connected inside the guide hopper (308), one end of the rotating rod (309) is provided through the side wall of the guide hopper (308), and a gear (312) is fixedly connected to the end of the rotating rod (309).

5. A portable heat pump grain dryer according to claim 4, characterized in that: The gear (312) has a tooth end meshing with a rack (313), and the bottom of the rack (313) is fixedly connected to the top of one of the cross plates (219).

6. A portable heat pump grain dryer according to claim 4, characterized in that: A rotating ring (310) is fixedly connected to the outer wall of the rotating rod (309), and a partition (311) is uniformly fixedly connected to the outer wall of the rotating ring (310). The partition (311) is disposed inside the guide hopper (308).

7. A portable heat pump grain dryer according to claim 4, characterized in that: One end of the cylinder (302) is equipped with a second motor (303), the output end of the second motor (303) is fixedly connected to a rotating shaft, and the outer wall of the rotating shaft is fixedly connected to a spiral conveying blade (304).

8. A portable heat pump grain dryer according to claim 4, characterized in that: The outer wall of the cylinder (302) is fixedly connected to the feed hopper (306), and a guide port (305) is opened on one side of the cylinder (302).

9. A portable heat pump grain dryer according to claim 1, characterized in that: A discharge pipe (202) is fixedly connected to one side of the receiving hopper (201).

10. A portable heat pump grain dryer according to claim 1, characterized in that: The bottom of the base (1) is uniformly fixedly connected with mounting seats (4), and the interior of the mounting seats (4) is rotatably connected with moving wheels (5). A tow hook (6) is fixedly connected to one side of the base (1).

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