Air-to-air heat exchanger for grain silos

Abstract

The utility model relates to a kind of air-temperature heat exchangers for granary, with chassis;Chassis is equipped with heat exchange shell, heat exchange shell is equipped with heat exchange cavity, heat exchange shell is equipped with hot gas import and hot gas export, heat exchange shell is also equipped with heat exchange import and heat exchange export, hot gas export is fixedly equipped with suction fan, heat exchange export is equipped with heat exchange fan, heat exchange cavity is equipped with heat exchanger, heat exchanger is equipped with multiple parallelly arranged first ventilation passageway and multiple parallelly arranged second ventilation passageway, each first ventilation passageway and hot gas import and hot gas export form gas inlet passageway, each second ventilation passageway and hot gas import and hot gas export form heat exchange passageway, gas inlet passageway and heat exchange passageway are not connected, suction fan draws the hot gas in granary into gas inlet passageway, heat exchange fan carries out heat exchange to the hot gas in gas inlet passageway.The utility model structure is ingenious, convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers for grain storage, and particularly to an air-temperature heat exchanger for grain storage. Background Technology

[0002] Grain warehouse ventilation refers to using fans to force cold, dry air from outside into the grain pile, replacing the hot, humid air inside and achieving cooling and moisture reduction. Generally, grains with high moisture content and high temperature require both cooling and moisture reduction, allowing for normal ventilation. However, for already dried grains (i.e., those with moisture content within safe storage standards), cooling and ventilation are necessary in winter after acceptance to prevent condensation and ensure safety; further moisture reduction is not required. Excessive moisture loss during ventilation after the grain moisture content has reached safe storage standards is the main cause of increased grain storage losses. The greater the moisture loss, the greater the loss. Theoretically, in a grain warehouse with a single capacity of 5000 tons, a 0.1% reduction in moisture content results in the loss of more than 5 tons of grain. Under normal conditions, a grain storage cycle of 3-5 years typically results in a moisture loss rate exceeding 0.7%, sometimes reaching over 1.0%, especially in dry winter climates where the losses are substantial.

[0003] When cold air from outside the grain silo is forced into the grain pile, it not only displaces heat but also exchanges moisture to some extent. Because the enthalpy of cold air is lower than that of hot air, meaning cold air carries less moisture, to achieve cooling and ventilation without moisture loss, cold air with an absolute humidity value similar to that inside the grain pile must be selected. When the temperature difference between the inside and outside of the grain silo exceeds 8°C, on a sunny day, the absolute humidity value of the cold air outside the silo is lower than that of the hot air inside the grain pile. Current technologies rely on manual operation for cooling and ventilation of grain silos, which cannot achieve cooling and ventilation without moisture loss. Therefore, it is necessary to develop a device that achieves cooling and heat exchange through circulating (non-displacement) ventilation. Summary of the Invention

[0004] The purpose of this invention is to provide an air-temperature heat exchanger for grain silos. It has an ingenious structure that enables efficient and convenient heat exchange of hot air inside the grain silo. It operates in a closed pipeline and returns the heat to the grain silo after exchange, achieving closed-loop cooling. This ensures that only heat is exchanged without any moisture loss.

[0005] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a base frame and a controller; a heat exchange shell is provided on the base frame, a heat exchange chamber is provided inside the heat exchange shell, a hot air inlet and a hot air outlet that can be connected to a grain silo are provided on the heat exchange shell, a heat exchange inlet and a heat exchange outlet are also provided on the heat exchange shell, an exhaust fan is fixedly provided inside the hot air outlet, a heat exchange fan is provided inside the heat exchange outlet, both the exhaust fan and the heat exchange fan are electrically connected to the controller, a heat exchanger is provided inside the heat exchange chamber, and a plurality of parallel first ventilation channels and a plurality of parallel second ventilation channels are provided inside the heat exchanger. Each first ventilation channel... Both ends of each ventilation channel are connected to the hot air inlet and the hot air outlet, respectively. Each first ventilation channel forms an air intake channel with the hot air inlet and the hot air outlet, respectively. Both ends of each second ventilation channel are connected to the heat exchange inlet and the heat exchange outlet, respectively. Each second ventilation channel forms a heat exchange channel with the hot air inlet and the hot air outlet, respectively. The first ventilation channels and the second ventilation channels are staggered and not connected. The air intake channel and the heat exchange channel are also not connected. The exhaust fan draws the hot air in the grain silo into the air intake channel, and the heat exchange fan draws the cold air into the heat exchange channel and exchanges heat with the hot air passing through the air intake channel.

[0006] Furthermore, the aforementioned heat exchange shell is equipped with a hot gas connecting pipe, which is connected to the heat exchange outlet. The heat exchange shell is also equipped with a heat exchange connecting pipe, which is connected to the heat exchange outlet. An exhaust fan is fixedly installed inside the hot gas connecting pipe. The exhaust fan draws the hot gas in the grain silo to the air inlet channel for heat exchange and cooling, and then pours it back into the grain silo through the hot gas connecting pipe. The heat exchange fan is fixedly installed in the heat exchange connecting pipe. The heat exchange fan draws cold air into the heat exchange channel and, after exchanging heat with the hot air in the air inlet channel, exits it through the heat exchange connecting pipe.

[0007] Furthermore, the heat exchange shell is provided with a side compartment, and the hot air inlet is located on the side compartment. The upper and lower surfaces of the heat exchange chamber are each provided with two opposing guide rails. The length of the guide rails is greater than or equal to the length of the heat exchange chamber. Each guide rail has a limiting plate at the end away from the hot air inlet. The extension direction of each guide rail is parallel to the extension direction of the air inlet channel. The upper and lower surfaces of the heat exchanger are each provided with guide grooves that are adapted to each guide rail. The heat exchanger is installed into the heat exchange chamber through the sliding fit of each guide rail and guide groove. The side compartment is rotatably connected to the heat exchange shell and fixed to the heat exchange shell by locking components.

[0008] Furthermore, each limiting plate is equipped with a buffer assembly that can cushion the heat exchanger during the sliding installation process. The length of each guide slide rail is greater than the length of the heat exchange cavity. The buffer assembly includes a limiting slide hole on the limiting plate, a limiting slide rod slidably disposed in the limiting slide hole, a buffer pressure block disposed on the limiting slide rod near the end of the heat exchanger, a buffer limiting block disposed on the limiting slide rod away from the heat exchanger, and a buffer spring sleeved on the limiting slide rod. The diameter of the buffer pressure block is greater than the diameter of the limiting slide rod. The two ends of the buffer spring act on the buffer pressure block and the limiting plate, respectively. Each buffer pressure block limits, presses, and cushions the slidingly installed heat exchanger through the sliding cooperation of the limiting slide rod and the limiting slide hole, as well as the continuous force of the buffer spring.

[0009] Furthermore, the heat exchange chamber is provided with multiple pressing arc rods on both the upper and lower bottom surfaces to press the heat exchanger together. The heat exchange chamber is also provided with a rotating base on both the upper and lower bottom surfaces. The pressing arc rods are provided with rotating shafts at both ends. The rotating bases are provided with rotating holes that are adapted to each rotating shaft. Each rotating shaft is fitted with a torsion spring. The two ends of the torsion springs act on the inner walls of the rotating shafts and rotating holes, respectively. The pressing arc rods are rotatably connected to the rotating bases through the cooperation of each rotating shaft and rotating hole, and are pressed against the heat exchanger by the continuous force of the torsion springs.

[0010] Furthermore, the heat exchanger comprises an upper cover plate, a lower cover plate, and multiple heat exchange plate assemblies stacked between the upper and lower cover plates. Each heat exchange plate assembly includes an upper partition plate, a cold-side fin, a lower partition plate, and a hot-side fin stacked sequentially from top to bottom. The upper and lower partition plates have the same length and width. A first ventilation channel is disposed on the hot-side fin, and a second ventilation channel is disposed on the cold-side fin. Both the hot-side and cold-side fins have wavy side fins on both sides. The extension direction of the side fins on both sides of the hot-side fin is parallel to the extension direction of the first ventilation channel, and the extension direction of the side fins on both sides of the cold-side fin is... The heat exchange plates are arranged parallel to the extension direction of the second ventilation channel. Both sides of the hot-side fins are pressed against hot-side seals. Each hot-side seal is parallel to the first ventilation channel. The hot-side fins are of the same length as the upper partition. After pressing against both sides of the hot-side fins, each hot-side seal is of the same width as the upper partition. Both sides of the cold-side fins are pressed against cold-side seals. Each cold-side seal is parallel to the second ventilation channel. The cold-side fins are of the same width as the upper partition. After pressing against both sides of the hot-side fins, each hot-side seal is of the same length as the upper partition. Multiple heat exchange plate groups are stacked and combined with the upper cover plate and the lower cover plate to form a heat exchanger in which the first ventilation channel and the second ventilation channel are arranged alternately.

[0011] Furthermore, temperature and humidity sensors are installed in both the hot air inlet and the outlet of the hot air connecting pipe, and each temperature and humidity sensor is electrically connected to the controller.

[0012] Furthermore, the aforementioned hot air connection pipe is equipped with a humidifier that can replenish moisture in the grain silo, and the humidifier is electrically connected to the controller.

[0013] Furthermore, the heat exchanger is equipped with a handle that allows it to be removed.

[0014] Furthermore, the top of the aforementioned heat exchange shell is provided with a lifting base for hoisting the heat exchange shell.

[0015] This utility model has the following positive effects: (1) By setting multiple first air inlet channels and multiple second air inlet channels in the heat exchanger, the hot air inlet, hot air outlet and the first air inlet channel form a closed air inlet channel, and the heat exchange inlet, heat exchange outlet and the second air inlet channel form a closed heat exchange channel. The air inlet channels and the heat exchange channels are not connected to each other. The hot air in the grain silo and the cold air outside exchange heat in the heat exchanger without mixing, which effectively reduces the temperature of the grain silo and improves the energy utilization efficiency. At the same time, it also avoids the loss of moisture in the grain silo. The hot air in the grain silo is circulated and absorbed by the exhaust fan and the heat exchange fan is used to circulate and absorb the hot air in the grain silo. By controlling the absorption flow of external cold air, independent control of the hot air inside the grain silo and the external cold air can be achieved. Through the cooperation of exhaust fans and heat exchange fans, the hot air inside the grain silo is circulated and cooled down step by step. At the same time, during the cooling process, the absolute isolation between the heat exchange channel and the air intake channel can prevent the loss of moisture inside the grain silo, enabling flexible operation and optimized heat exchange. In addition, the first and second air passages in the heat exchanger are staggered and not connected, ensuring a large heat exchange area and high efficiency, while also ensuring the compactness of the overall structure. The structure is ingenious, convenient and practical.

[0016] (2) This utility model uses a hot gas connection pipe and a heat exchange connection pipe to return the low-temperature airflow after heat exchange to the grain silo, forming a closed-loop system, which improves heat recovery efficiency and reduces energy loss. The exhaust fan and the heat exchange fan are fixed inside the hot gas connection pipe and the heat exchange connection pipe respectively, which has a high degree of integration, reduces external components, and is easy to install and maintain. The design of the hot gas connection pipe and the heat exchange connection pipe clarifies the flow direction of the airflow, reduces turbulence, and improves the stability and efficiency of heat exchange.

[0017] (3) By setting a side compartment, the rotation of the side compartment facilitates the installation and disassembly of the heat exchanger. The cooperation between the guide rail and the guide groove on the heat exchanger ensures the accurate positioning of the heat exchanger and avoids misalignment. At the same time, the setting of the limiting plate can also ensure the accuracy of the heat exchanger installation and prevent the heat exchanger from falling off during the sliding process. Furthermore, the locking parts ensure the overall sealing and stability.

[0018] (4) By setting up a buffer assembly, the limiting slide rod and buffer spring in the buffer assembly provide buffering force during the installation of the heat exchanger, reducing collision and wear. The continuous force of the buffer spring keeps the heat exchanger in a tight position during operation, reducing noise or performance degradation caused by vibration. The buffer pressure block automatically limits and presses the heat exchanger, making the installation process smoother and greatly reducing the need for manual adjustment, which is efficient and convenient.

[0019] (5) By setting up a pressing arc rod, the pressing arc rod presses the heat exchanger into the heat exchange chamber through the continuous force of the torsion spring, preventing loosening or displacement during operation and improving heat exchange efficiency. At the same time, the design of the torsion spring can absorb vibration during operation, reduce noise and structural fatigue. The rotation of the pressing arc rod can quickly press and release the heat exchanger, improving the overall maintenance efficiency.

[0020] (6) This utility model is constructed by stacking multiple heat exchange plates consisting of upper baffles, cold-side fins, lower baffles, and hot-side fins. Both the hot-side and cold-side fins have wavy side fins on both sides. This densely stacked structure creates a large heat exchange surface area within a limited volume. The wavy side fins in the cold and hot side channels effectively disturb the airflow and disrupt the boundary layer, thereby greatly enhancing the turbulence effect and heat transfer process. This ensures efficient and sufficient heat exchange between the wet and hot exhaust gas from the grain silo and the external cold air. The hot-side and cold-side seals are pressed against the sides of the hot-side and cold-side fins respectively. The combination of upper and lower partitions creates physically independent first and second ventilation channels, ensuring absolute isolation between the hot and humid exhaust gas inside the grain silo and the cold air outside. This not only prevents grain contamination or moisture damage caused by medium mixing but also ensures the purity and effectiveness of the heat exchange process, improving the safety and reliability of the entire system. Multiple heat exchange plate groups, along with the upper and lower cover plates, are stacked and pressed together to form a robust whole. The stacked structure has high mechanical strength and pressure resistance, capable of withstanding airflow pressure within the channels and assembly pre-tightening force, ensuring the structural stability and long lifespan of the heat exchanger during long-term operation.

[0021] (7) By setting temperature and humidity sensors at the hot air inlet and the outlet of the hot air connecting pipe, the temperature inside the grain warehouse can be monitored in real time by monitoring the temperature of the hot air. The temperature can be monitored to control the cooling of the grain warehouse step by step in real time. At the same time, the humidity sensor can monitor the loss of moisture during the heat exchange process, which further ensures the temperature and humidity inside the grain warehouse after heat exchange.

[0022] (8) By setting up a humidifier, this utility model can replenish the moisture in the grain warehouse in real time according to the humidity requirements in the grain warehouse.

[0023] (9) The design of the handle makes it easy for users to take out or install the heat exchanger. The handle design will not interfere with the side compartment, which greatly simplifies the process of cleaning, inspecting and replacing the heat exchanger, making it efficient and convenient.

[0024] (10) By setting up a hoisting base, the heat exchange shell can be transferred by hoisting and installed with the base frame, which is safe and practical. Attached Figure Description

[0025] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the overall structure of the air-temperature heat exchanger for grain warehouses according to this utility model; Figure 2 This is a front view of the overall structure of the air-temperature heat exchanger for grain warehouses according to this utility model; Figure 3 This is a top view of the overall structure of the air-temperature heat exchanger for grain warehouses according to this utility model; Figure 4 This is a side view of the overall structure of the air-temperature heat exchanger for grain storage in this utility model; Figure 5 This is a schematic diagram of the internal structure of the air-temperature heat exchanger for grain warehouses according to this utility model; Figure 6 This is a partial exploded view of the overall structure of the heat exchanger in this utility model; Figure 7 This is a schematic diagram of the overall structure of the heat exchanger in this utility model; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the overall structure of the buffer assembly in this utility model; Figure 10 This is a schematic diagram of the overall structure of the pressure arc rod in this utility model; The attached figures are labeled as follows: 1. Base frame; 2. Heat exchange shell; 21. Lifting base; 22. Rotating base; 23. Rotating hole; 23. Side compartment; 3. Hot air inlet; 31. Hot air connecting pipe; 4. Exhaust fan; 41. Heat exchange connecting pipe; 5. Heat exchange fan; 51. Heat exchange inlet; 52. Heat exchanger; 6. Upper cover plate; 6a. Lower cover plate; 6b. Upper partition plate; 6c. Cold side fin plate; 6d. Lower partition plate; 6e. Hot side fin plate; 6f. Hot side seal; 6g. Cold side seal; 6h. Side fin plate; 6i. First ventilation channel; 61. Second ventilation channel; 62. Guide slide groove; 63. Guide slide rail; 64. Handle; 65. Limiting plate; 66. Buffer assembly; 7. Limiting slide rod; 71. Buffer pressure block; 72. Buffer spring; 73. Buffer limiting block; 74. Pressing arc rod; 8. Rotating shaft; 81. Torsion spring; 82. Humidifier; 9. Temperature sensor a; Humidity sensor b. Detailed Implementation

[0026] See Figures 1 to 10 This utility model comprises a base frame 1 and a controller; a heat exchange shell 2 is provided on the base frame 1, and a heat exchange chamber is provided inside the heat exchange shell 2. The heat exchange shell 2 is provided with a hot air inlet 31 and a hot air outlet that can be connected to a grain silo. The heat exchange shell 2 is also provided with a heat exchange inlet and a heat exchange outlet 52. An exhaust fan 41 is fixedly installed inside the hot air outlet, and a heat exchange fan 51 is installed inside the heat exchange outlet 52. Both the exhaust fan 41 and the heat exchange fan 51 are electrically connected to the controller. A heat exchanger 6 is provided inside the heat exchange chamber. The heat exchanger 6 is provided with multiple parallel first ventilation channels 61 and multiple parallel second ventilation channels 62. The two ends of each first ventilation channel 61 are respectively connected to... The hot air inlet 31 and the hot air outlet are connected. Each first ventilation channel 61 forms an air intake channel with the hot air inlet 31 and the hot air outlet. Each second ventilation channel 62 is connected to the heat exchange inlet and the heat exchange outlet 52 at both ends, and forms a heat exchange channel with the hot air inlet 31 and the hot air outlet. The first ventilation channels 61 and the second ventilation channels 62 are staggered and not connected. The air intake channel and the heat exchange channel are also not connected. The exhaust fan 41 draws the hot air in the grain silo into the air intake channel, and the heat exchange fan 51 draws the cold air into the heat exchange channel and exchanges heat with the hot air passing through the air intake channel.

[0027] The heat exchange shell 2 is provided with a hot air connection pipe 4, which is connected to the heat exchange outlet 52. The heat exchange shell 2 is also provided with a heat exchange connection pipe 5, which is connected to the heat exchange outlet 52. An exhaust fan 41 is fixedly installed inside the hot air connection pipe 4. The exhaust fan 41 draws the hot air in the grain silo to the air inlet channel for heat exchange and cooling, and then pours it back into the grain silo from the hot air connection pipe 4. The heat exchange fan 51 is fixedly installed in the heat exchange connection pipe 5. The heat exchange fan 51 draws cold air into the heat exchange channel and, after exchanging heat with the hot air in the air inlet channel, exits it from the heat exchange connection pipe 5.

[0028] The heat exchange shell 2 is provided with a side compartment 3, and the hot air inlet 31 is located on the side compartment 3. The upper and lower bottom surfaces of the heat exchange cavity are each provided with two opposing guide rails 64. The length of the guide rails 64 is greater than or equal to the length of the heat exchange cavity. Each guide rail 64 has a limiting plate 66 at one end away from the hot air inlet 31. The extension direction of each guide rail 64 is parallel to the extension direction of the air inlet channel. The upper and lower bottom surfaces of the heat exchanger 6 are each provided with a guide groove 63 that matches each guide rail 64. The heat exchanger 6 is installed into the heat exchange cavity through the sliding cooperation of each guide rail 64 and the guide groove 63. The side compartment 3 is rotatably connected to the heat exchange shell 2 and fixed to the heat exchange shell 2 by a locking member.

[0029] Each limiting plate 66 is provided with a buffer assembly 7 to buffer the heat exchanger 6 during the sliding installation of the heat exchanger 6. The length of each guide slide rail 64 is greater than the length of the heat exchange chamber. The buffer assembly 7 includes a limiting slide hole on the limiting plate 66, a limiting slide rod 71 slidably disposed in the limiting slide hole, a buffer pressure block 72 disposed on the limiting slide rod 71 near one end of the heat exchanger 6, a buffer limiting block 74 disposed on the limiting slide rod 71 away from the heat exchanger 6, and a buffer spring 73 sleeved on the limiting slide rod 71. The diameter of the buffer pressure block 72 is greater than the diameter of the limiting slide rod 71. The two ends of the buffer spring 73 act on the buffer pressure block 72 and the limiting plate 66 respectively. Each buffer pressure block 72 limits, presses and buffers the sliding heat exchanger 6 through the sliding cooperation of the limiting slide rod 71 and the limiting slide hole, and the continuous force of the buffer spring 73.

[0030] The heat exchange chamber has multiple pressing arc rods 8 on its upper and lower surfaces to press the heat exchanger 6 together. The heat exchange chamber also has a rotating base 22 on its upper and lower surfaces. The pressing arc rods 8 have rotating shafts 81 at both ends. The rotating base 22 has rotating holes 23 that are adapted to each rotating shaft 81. Each rotating shaft 81 is fitted with a torsion spring 82. The two ends of the torsion spring 82 act on the inner walls of the rotating shaft 81 and the rotating hole 23, respectively. The pressing arc rods 8 are rotatably connected to the rotating base 22 through the cooperation of each rotating shaft 81 and the rotating hole 23, and are pressed against the heat exchanger 6 by the continuous force of the torsion spring 82.

[0031] The heat exchanger 6 comprises an upper cover plate 6a, a lower cover plate 6b, and multiple heat exchange plate assemblies stacked between the upper cover plate 6a and the lower cover plate 6b. Each heat exchange plate assembly includes an upper partition plate 6c, a cold-side fin 6d, a lower partition plate 6e, and a hot-side fin 6f stacked sequentially from top to bottom. The upper partition plate 6c and the lower partition plate 6e have the same length and width. A first ventilation channel 61 is disposed on the hot-side fin 6f, and a second ventilation channel 62 is disposed on the cold-side fin 6d. Both sides of the hot-side fin 6f and the cold-side fin 6d are provided with wavy side fins 6i. The extension direction of the side fins 6i on both sides of the hot-side fin 6f is parallel to the extension direction of the first ventilation channel 61, and the extension direction of the side fins 6i on both sides of the cold-side fin 6d is parallel to the extension direction of the second ventilation channel 61. The ventilation channels 62 extend in parallel directions. Hot-side seals 6g are pressed against both sides of the hot-side fin 6f. Each hot-side seal 6g is parallel to the first ventilation channel 61. The hot-side fin 6f is of the same length as the upper partition 6c. Each hot-side seal 6g is pressed against both sides of the hot-side fin 6f and is of the same width as the upper partition 6c. Cold-side seals 6h are pressed against both sides of the cold-side fin 6d. Each cold-side seal 6h is parallel to the second ventilation channel 62. The cold-side fin 6d is of the same width as the upper partition 6c. Each hot-side seal 6g is pressed against both sides of the hot-side fin 6f and is of the same length as the upper partition 6c. Multiple heat exchange plate groups are stacked and combined with the upper cover plate 6a and the lower cover plate 6b to form a heat exchanger 6 with the first ventilation channel 61 and the second ventilation channel 62 arranged alternately.

[0032] Temperature sensor a and humidity sensor b are installed in both the hot air inlet 31 and the outlet of the hot air connecting pipe, and each temperature sensor a and humidity sensor b is electrically connected to the controller.

[0033] The hot air connection pipe 4 is equipped with a humidifier 9 that can replenish the moisture in the grain silo, and the humidifier 9 is electrically connected to the controller.

[0034] The heat exchanger 6 is provided with a handle 65 for removing the heat exchanger 6.

[0035] The top of the heat exchange shell 2 is provided with a hoisting seat 21 for hoisting the heat exchange shell 2.

[0036] The working principle of this utility model is as follows: During use, the heat exchange shell 2 is installed on the base frame 1 via a crane or other hoisting equipment connected to the hoisting base 21. Then, the heat exchanger 6 is installed inside the heat exchange chamber. During installation, the guide grooves 63 on the heat exchanger 6 are connected to the corresponding guide rails 64 inside the heat exchange chamber, ensuring the stability and smoothness of the overall installation of the heat exchanger 6. During installation, the buffer blocks 72 limit and cushion the sliding heat exchanger 6 through the sliding cooperation of the limiting slide rods 71 ​​and limiting slide holes, and the continuous force of the buffer springs 73. After the heat exchanger 6 enters the heat exchange chamber, the pressing arc rods 8 are rotatably connected to the rotating base 22 through the cooperation of the rotating shafts 81 and rotating holes 23, and press against the heat exchanger 6 through the continuous force of the torsion springs 82. Through heat exchange... The positioning on both sides of the heat exchanger 6 ensures the accuracy and firmness of its installation, thus preventing vibration or displacement during use. After the heat exchanger 6 is installed, each of the first ventilation channels 61 forms a one-way sealed air intake channel with the hot air inlet 31 and the hot air outlet, and each of the second ventilation channels 62 forms a one-way sealed heat exchange channel with the hot air inlet 31 and the hot air outlet. The exhaust fan 41 draws the hot air in the grain silo into the air intake channel for heat exchange and then pours it back into the grain silo through the hot air connecting pipe 4. The heat exchange fan 51 is fixedly installed on the heat exchange connecting pipe 5. The heat exchange fan 51 draws cold air into the heat exchange channel and, after exchanging heat with the hot air in the air intake channel, discharges it through the heat exchange connecting pipe 5, thus realizing the heat exchange of the hot air in the grain silo. At the same time, the sealed heat exchange environment also prevents the loss of moisture in the grain silo, greatly improving the efficiency and quality of heat exchange in the grain silo.

[0037] During the heat exchange process, the controller sends drive signals to the exhaust fan 41 and the heat exchange fan 51. Both the exhaust fan 41 and the heat exchange fan 51 are variable frequency fans, and the airflow can be controlled. The exhaust fan 41 begins to extract the hot air from the grain silo. During the extraction process, the temperature sensor a and humidity sensor b at the hot air inlet 31 measure the initial temperature and humidity of the hot air in the grain silo. As the hot air passes through the air inlet channel, the heat exchange fan sends cold air into the heat exchange channel, where the hot air passing through the air inlet channel undergoes heat exchange treatment. After heat exchange, the hot air enters the hot air connecting pipe 4. The temperature sensor a and humidity sensor b on the hot air connecting pipe 4 measure the temperature and humidity after one heat exchange. When the measured temperature is still higher than the required temperature in the grain silo, After heat exchange, the gas enters the grain silo and is then extracted by the exhaust fan 41. This process is repeated multiple times, gradually cooling and exchanging heat until the gas in the grain silo reaches the required temperature. A humidity sensor b monitors whether there is moisture loss during the multiple heat exchange processes. When moisture loss occurs, or when the moisture content of the gas in the grain silo needs to be increased, the controller sends a drive signal to the humidifier 9. The humidifier 9 injects water vapor into the hot gas connection pipe 4, which enters the grain silo along with the hot gas. This allows for precise control of the temperature and humidity inside the grain silo and timely and efficient adjustment of the temperature and humidity according to the usage requirements of the grain silo. It has good adjustability and applicability, and its ingenious structure makes it convenient and practical.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A grain bin air-to-air heat exchanger having a base frame and a controller; characterized by: The base frame is equipped with a heat exchange shell, which contains a heat exchange chamber. The heat exchange shell has a hot air inlet and a hot air outlet that can be connected to the grain silo. It also has a heat exchange inlet and a heat exchange outlet. An exhaust fan is fixedly installed inside the hot air outlet, and a heat exchange fan is installed inside the heat exchange outlet. Both the exhaust fan and the heat exchange fan are electrically connected to a controller. A heat exchanger is installed inside the heat exchange chamber. The heat exchanger has multiple parallel first ventilation channels and multiple parallel second ventilation channels. The two ends of each first ventilation channel are respectively connected to the hot air inlet and the hot air outlet. The openings are connected, and each first ventilation channel forms an air intake channel with the hot air inlet and hot air outlet. Each second ventilation channel is connected to the heat exchange inlet and heat exchange outlet at both ends, and forms a heat exchange channel with the hot air inlet and hot air outlet. The first ventilation channels and the second ventilation channels are staggered and not connected. The air intake channels and the heat exchange channels are also not connected. The exhaust fan draws the hot air in the grain silo into the air intake channel, and the heat exchange fan draws the cold air into the heat exchange channel and exchanges heat with the hot air passing through the air intake channel.

2. The air-to-air heat exchanger for a grain bin of claim 1, wherein: The heat exchange shell is equipped with a hot gas connection pipe, which is connected to the heat exchange outlet. The heat exchange shell is also equipped with a heat exchange connection pipe, which is connected to the heat exchange outlet. An exhaust fan is fixedly installed inside the hot gas connection pipe. The exhaust fan draws the hot gas in the grain silo to the air inlet channel for heat exchange and cooling, and then pours it back into the grain silo through the hot gas connection pipe. The heat exchange fan is fixedly installed in the heat exchange connection pipe. The heat exchange fan draws cold air into the heat exchange channel and, after exchanging heat with the hot air in the air inlet channel, exits it through the heat exchange connection pipe.

3. The air-to-air heat exchanger for a grain bin of claim 2, wherein: The heat exchanger shell is provided with a side compartment, and the hot air inlet is located on the side compartment. The upper and lower bottom surfaces of the heat exchanger cavity are each provided with two opposing guide rails. The length of the guide rails is greater than or equal to the length of the heat exchanger cavity. Each guide rail has a limiting plate at the end away from the hot air inlet. The extension direction of each guide rail is parallel to the extension direction of the air inlet channel. The upper and lower bottom surfaces of the heat exchanger are each provided with a guide groove that matches each guide rail. The heat exchanger is installed into the heat exchanger cavity through the sliding fit of each guide rail and guide groove. The side compartment is rotatably connected to the heat exchanger shell and fixed to the heat exchanger shell by locking components.

4. The air-to-air heat exchanger for a grain bin of claim 3, wherein: Each limiting plate is equipped with a buffer assembly that can cushion the heat exchanger during the sliding installation process. The length of each guide slide rail is greater than the length of the heat exchange chamber. The buffer assembly includes a limiting slide hole on the limiting plate, a limiting slide rod slidably disposed in the limiting slide hole, a buffer pressure block disposed on the limiting slide rod near the end of the heat exchanger, a buffer limiting block disposed on the limiting slide rod away from the heat exchanger, and a buffer spring sleeved on the limiting slide rod. The diameter of the buffer pressure block is greater than the diameter of the limiting slide rod. The two ends of the buffer spring act on the buffer pressure block and the limiting plate, respectively. Each buffer pressure block limits, presses, and cushions the slidingly installed heat exchanger through the sliding cooperation of the limiting slide rod and the limiting slide hole, as well as the continuous force of the buffer spring.

5. The air-to-air heat exchanger for a grain bin of claim 4, wherein: The heat exchange chamber has multiple pressing arc rods on its upper and lower surfaces to press the heat exchanger together. The heat exchange chamber also has a rotating base on its upper and lower surfaces. The pressing arc rods have rotating shafts at both ends. The rotating bases have rotating holes that fit the rotating shafts. Each rotating shaft is fitted with a torsion spring. The two ends of the torsion springs act on the inner walls of the rotating shafts and rotating holes, respectively. The pressing arc rods are rotatably connected to the rotating bases through the cooperation of the rotating shafts and rotating holes, and are pressed against the heat exchanger by the continuous force of the torsion springs.

6. The air-to-air heat exchanger for a grain bin of claim 5, wherein: The heat exchanger comprises an upper cover plate, a lower cover plate, and multiple heat exchange plate assemblies stacked between the upper and lower cover plates. Each heat exchange plate assembly includes an upper partition plate, a cold-side fin, a lower partition plate, and a hot-side fin stacked sequentially from top to bottom. The upper and lower partition plates have the same length and width. A first ventilation channel is located on the hot-side fin, and a second ventilation channel is located on the cold-side fin. Both the hot-side and cold-side fins have wavy side fins on both sides. The extension direction of the side fins on both sides of the hot-side fin is parallel to the extension direction of the first ventilation channel, and the extension direction of the side fins on both sides of the cold-side fin is parallel to the extension direction of the first ventilation channel. The two ventilation channels extend in parallel directions. Hot-side seals are pressed against both sides of the hot-side fins. Each hot-side seal is parallel to the first ventilation channel. The hot-side fins are of the same length as the upper partition. Each hot-side seal is pressed against both sides of the hot-side fins and is the same width as the upper partition. Cold-side seals are pressed against both sides of the cold-side fins. Each cold-side seal is parallel to the second ventilation channel. The cold-side fins are of the same width as the upper partition. Each hot-side seal is pressed against both sides of the hot-side fins and is the same length as the upper partition. Multiple heat exchange plate groups are stacked and combined with the upper cover plate and the lower cover plate to form a heat exchanger in which the first ventilation channel and the second ventilation channel are arranged alternately.

7. The air-to-air heat exchanger for a grain bin of claim 6, wherein: Temperature and humidity sensors are installed in both the hot air inlet and the outlet of the hot air connecting pipe, and each temperature and humidity sensor is electrically connected to the controller.

8. The air-to-air heat exchanger for a grain bin of claim 7, wherein: The hot air connection pipe is equipped with a humidifier that can replenish the moisture in the grain silo, and the humidifier is electrically connected to the controller.

9. The air-to-air heat exchanger for a grain bin of claim 8, wherein: The heat exchanger is equipped with a handle that allows it to be removed.

10. The air-to-air heat exchanger for a grain bin of claim 9, wherein: The top of the heat exchange shell is provided with a hoisting base for hoisting the heat exchange shell.

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