A cooling system for grain storage

Abstract

This utility model belongs to the field of grain storage technology, specifically referring to a cooling system for a grain storage facility, including an integrated air conditioner and a fan. Air supply ducts are installed on the inner side of each wall of the grain storage facility, with cold air ducts connected below them. A return air cage (first type) is installed on the floor of the grain storage facility, with the other end connected to a return air cage (second type). A return air cage (third type) is connected to the second type, with one end connected to the second type and the other end connected to a return air box. Multiple return air holes are provided on each of the return air cages (first, second, and third types). A return air pipe is provided on the return air box. An air conditioner outlet pipe is connected to the air conditioner outlet, and an air conditioner inlet pipe is connected to the air conditioner inlet. A fan outlet pipe is connected to the fan outlet, and a fan inlet pipe is connected to the fan inlet. Both the air conditioner outlet pipe and the fan outlet pipe are connected to the supply air duct, and both the air conditioner inlet pipe and the fan inlet pipe are connected to the return air pipe. This invention can effectively cool down the wall, the grain near the wall, and the upper, middle and lower parts of the grain, with a good cooling effect.

Description

Technical Field

[0001] This utility model belongs to the field of grain storage technology, and specifically refers to a cooling system for grain storage. Background Technology

[0002] Grain silos are specialized buildings used for large-scale grain storage and must possess properties such as moisture resistance, heat insulation, and ventilation. High temperatures inside grain silos can easily cause grain to mold, thus requiring cooling measures.

[0003] The existing air conditioners for grain silos have air outlets that lead to the surface of the grain. The hot air inside the grain silo flows back into the air conditioner through the return air vents for heat exchange and cooling. This air circulation process can only cool the grain at the top, but cannot cool the grain in the middle or at the bottom. At the same time, the walls of the grain silo are exposed to solar radiation, so the temperature of the walls is high, and the temperature of the grain near the walls is also high. This air circulation cannot effectively cool the grain near the walls. Utility Model Content

[0004] The purpose of this invention is to provide a cooling system for a grain warehouse, which can effectively cool the walls, the grain near the walls, and the upper, middle and lower parts of the grain, with good cooling effect.

[0005] This utility model is implemented as follows: A cooling system for a grain silo includes an integrated air conditioner and fan installed on the outside of the silo. Horizontally installed air supply ducts are mounted on the inner sides of each wall of the silo. Multiple vertically arranged, closed-end cold air ducts are connected to the lower part of each air supply duct. The upper ends of the cold air ducts are connected to the air supply ducts, and multiple air outlets are distributed on the side walls of the cold air ducts. Two or more parallel return air cages are installed on the floor of the silo. One end of each return air cage is closed, and the other end is connected to a second return air cage. Both ends of the second return air cage are closed. A third return air cage is connected to the second return air cage. One end is connected to the return air cage 2, and the other end is connected to the return air box located inside the grain silo wall. The return air cage 1 is provided with multiple return air holes, and the return air box is provided with a return air pipe. The air outlet of the integrated air conditioner is connected to an air conditioner air outlet pipe extending into the grain silo, and the air inlet is connected to an air conditioner air inlet pipe extending into the grain silo. The air outlet of the fan is connected to a fan air outlet pipe extending into the grain silo, and the air inlet is connected to a fan air inlet pipe extending into the grain silo. The air conditioner air outlet pipe and the fan air outlet pipe are both connected to the air supply pipe, and the air conditioner air inlet pipe and the fan air inlet pipe are both connected to the return air pipe.

[0006] In the above-mentioned cooling system for a grain silo, the cooling system is provided in two sets, and the two integrated air conditioners are installed on opposite walls. The return air cages of the two cooling systems are arranged in parallel, and the air supply pipes of the two cooling systems form a ring structure. The cold air pipes are provided on the inner side of each wall of the grain silo.

[0007] In the aforementioned grain storage cooling system, one end of the air conditioning outlet duct is connected to the air outlet of the integrated air conditioner, and the other end is connected to one end of the air supply duct. The other end of the air supply duct is connected to the cold air duct. One end of the air conditioning inlet duct is connected to the air inlet of the integrated air conditioner, and the other end is connected to the return air duct. One end of the fan outlet duct is connected to the air outlet of the fan, and the other end is connected to the air conditioning outlet duct. One end of the fan inlet duct is connected to the air inlet of the fan, and the other end is connected to the return air duct.

[0008] In the aforementioned cooling system for a grain silo, the cross-sections of the first, second, and third return air cages are all hollow arches. The end of the first return air cage away from the second return air cage is sealed by a sealing plate, and both ends of the second return air cage are sealed by sealing plates.

[0009] In the aforementioned grain silo cooling system, valves are respectively installed on the air conditioning outlet pipe, the fan outlet pipe, the air conditioning inlet pipe, and the fan inlet pipe.

[0010] In the aforementioned grain silo cooling system, the integrated air conditioner can be a grain silo-specific energy-saving air conditioner disclosed in Chinese Invention Patent (Announcement No. CN112616456 B, Application Date 2020.12.04, Announcement Date 2023.04.11), or an improved grain silo air conditioning unit for cooling grain surfaces disclosed in Chinese Utility Model Patent (Announcement No. CN223153672U, Application Date 2024.10.08, Announcement Date 2025.07.25), or a grain silo air conditioner disclosed in Chinese Utility Model Patent (Announcement No. CN223258312U, Application Date 2024.08.19, Announcement Date 2025.08.22).

[0011] In the aforementioned grain silo cooling system, the fan can be a single-unit centrifugal fan for automatic temperature control of grain silos disclosed in Chinese Invention Patent (Publication No. CN104405669A, Application Date 2014.10.28, Publication Date 2015.03.11), or a special fan for grain silos disclosed in Chinese Utility Model Patent (Publication No. CN204436835U, Application Date 2015.01.16, Publication Date 2015.07.01).

[0012] In the aforementioned cooling system for a grain silo, the size and shape of the vent holes are determined by the grain inside the silo, as long as the grain does not fall into the vent holes.

[0013] The outstanding advantages of this utility model compared to the prior art are: This invention involves installing horizontally arranged air supply ducts on the inner side of each wall of the grain silo, and connecting multiple vertically arranged and closed-end cold air ducts below the air supply ducts. Multiple air outlets are distributed on the side walls of the cold air ducts. An integrated air conditioner's outlet is connected to an air conditioner outlet duct extending into the grain silo, which is connected to the air supply duct. The cold air generated by the integrated air conditioner effectively cools the walls of the grain silo and the grain near the walls. Three return air cages (one, two, and three) are installed on the floor of the grain silo, connected to the air conditioner's inlet duct via a return air box and return air pipe, effectively circulating air from the upper, middle, and lower parts of the grain, thereby effectively cooling these parts. Simultaneously, this invention includes a fan, with its inlet duct connected to the return air duct and its outlet duct connected to the air supply duct, accelerating air circulation and shortening the cooling time, resulting in a good cooling effect. Meanwhile, this utility model connects the integrated air conditioner and the fan in parallel, sharing the same set of air supply and return pipes, which allows the cooling system of this utility model to operate flexibly. It can use the integrated air conditioner alone for cooling circulation, or use the fan alone for air circulation, or use the integrated air conditioner and the fan simultaneously for forced cooling circulation, which enhances the system's adaptability and energy efficiency potential. The structural design is ingenious. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a pipe layout diagram of the rear wall of the grain warehouse according to this utility model.

[0016] Figure 3 yes Figure 2 Enlarged view of point A.

[0017] Figure 4 This is a layout diagram of the air return cages on the ground of the grain warehouse.

[0018] Figure 5 yes Figure 4 Enlarged view of point B.

[0019] Attached diagram labels: 1. Integrated air conditioner; 2. Fan; 3. Air supply duct; 4. Cold air duct; 5. Air outlet 1; 6. Return air cage 1; 7. Return air cage 2; 8. Return air cage 3; 9. Return air box; 10. Return air hole; 11. Return air pipe; 12. Air conditioner outlet duct; 13. Air conditioner inlet duct; 14. Fan outlet duct; 15. Fan inlet duct; 16. Valve. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —5: A cooling system for a grain silo includes an integrated air conditioner 1 and a fan 2 installed on the outside of the silo. Horizontally installed air supply ducts 3 are mounted on the inner sides of each wall of the silo. Multiple vertically arranged, closed-end cold air ducts 4 are connected to the lower part of each air supply duct 3. The upper ends of the cold air ducts 4 are connected to the air supply ducts 3, and multiple air outlets 5 are distributed on the side walls of the cold air ducts 4. Two or more parallel return air cages 6 are installed on the floor of the silo. One end of each return air cage 6 is closed, and the other end is connected to a second return air cage 7. Both ends of the second return air cage 7 are closed. A third return air cage 8 is connected to the second return air cage 7, and one end of the third return air cage 8 is connected to the return air cage. 2.7. The other end is connected to the return air box 9 located inside the grain warehouse wall. The return air cage 6 is provided with multiple return air holes 10. The return air box 9 is provided with a return air pipe 11. The air outlet of the integrated air conditioner 1 is connected to an air conditioner air outlet pipe 12 extending into the grain warehouse, and the air inlet is connected to an air conditioner air inlet pipe 13 extending into the grain warehouse. The air outlet of the fan 2 is connected to a fan air outlet pipe 14 extending into the grain warehouse, and the air inlet is connected to a fan air inlet pipe 15 extending into the grain warehouse. The air conditioner air outlet pipe 12 and the fan air outlet pipe 14 are both connected to the air supply pipe 3, and the air conditioner air inlet pipe 13 and the fan air inlet pipe 15 are both connected to the return air pipe 11.

[0021] In the attached diagram, solid arrows indicate the direction of airflow, and dashed arrows indicate the direction of airflow return.

[0022] The working principle of this utility model is as follows: Figure 1-5 As shown, the grain is placed above the return air cage 1 (6), return air cage 2 (7), and return air cage 3 (8). The cold air generated by the integrated air conditioner 1 is blown out from the air outlet 1 (5) through the air conditioner outlet duct 12, air supply duct 3, and cold air duct 4. The air in the grain silo returns to the integrated air conditioner 1 through the return air hole 10, return air cage 1 (6), return air cage 2 (7), return air cage 3 (8), return air box 9, return air pipe 11, and air conditioner inlet duct 13, and exchanges heat with the integrated air conditioner 1. At the same time, the air in the grain silo also enters the fan 2 through the return air pipe 11 and the fan inlet duct 15, and enters the air supply duct 3 through the fan outlet duct 14.

[0023] This invention involves installing horizontally arranged air supply pipes 3 on the inner side of each wall of the grain silo, and connecting multiple vertically arranged and closed-end cold air pipes 4 below the air supply pipes 3. Multiple air outlets 5 are distributed on the side walls of the cold air pipes 4. An air outlet 12 extending into the grain silo is connected to the air outlet of an integrated air conditioner 1. The air outlet 12 is connected to the air supply pipes 3. The cold air generated by the integrated air conditioner 1 effectively cools the walls of the grain silo and the grain near the walls. A return air system is installed on the floor of the grain silo. The system includes cage 1 (6), return air cage 2 (7), and return air cage 3 (8), which are connected to the air conditioning inlet pipe 13 via the return air box 9 and the return air pipe 11. This effectively circulates the air in the upper, middle, and lower parts of the grain, thereby effectively cooling the upper, middle, and lower parts of the grain. At the same time, the system is equipped with a fan 2. The fan inlet pipe 15 of the fan 2 is connected to the return air pipe 11, and the fan outlet pipe 14 of the fan 2 is connected to the air supply pipe 3, which accelerates air circulation and shortens the time required for cooling, resulting in a good cooling effect.

[0024] This utility model connects the integrated air conditioner 1 and the fan 2 in parallel, sharing the same set of air supply and return pipes, which allows the cooling system of this utility model to operate flexibly. It can use the integrated air conditioner 1 alone for cooling circulation, or use the fan 2 alone for air circulation, or use the integrated air conditioner 1 and the fan 2 simultaneously for forced cooling circulation, which enhances the adaptability and energy efficiency potential of the system. The structural design is ingenious.

[0025] Furthermore, the end of the return air cage 6 connected to the return air cage 7 does not have the return air hole 10, and the length of the end without the return air hole 10 is 2 to 3 meters.

[0026] When the grain storage space is large, in order to ensure the cooling effect, such as Figure 1 , 2 As shown in Figure 4, the cooling system is provided in two sets, and the two integrated air conditioners 1 are installed on opposite walls. The return air cages 6 of the two cooling systems are arranged in parallel, and the air supply pipes 3 of the two cooling systems form a ring structure. The cold air pipes 4 are provided on the inner side of each wall of the grain warehouse.

[0027] In this embodiment, the integrated air conditioner 1 of the first cooling system is located on the outer side of the front wall of the grain silo, and the integrated air conditioner 1 of the second cooling system is located on the outer side of the rear wall of the grain silo. The air supply duct 3 of the first cooling system is located on the inner side of the front wall of the grain silo to the right of the integrated air conditioner 1 of the first cooling system, the inner side of the right wall of the grain silo, and the inner side of the rear wall of the grain silo to the right of the integrated air conditioner 1 of the second cooling system. The air supply duct 3 of the second cooling system is located on the inner side of the rear wall of the grain silo to the left of the integrated air conditioner 1 of the second cooling system, the inner side of the left wall of the grain silo, and the inner side of the front wall of the grain silo to the left of the integrated air conditioner 1 of the first cooling system.

[0028] Furthermore, one end of the air conditioner outlet pipe 12 is connected to the air outlet of the integrated air conditioner 1, and the other end is connected to one end of the air supply pipe 3. The other end of the air supply pipe 3 is connected to the cold air pipe 4. One end of the air conditioner inlet pipe 13 is connected to the air inlet of the integrated air conditioner 1, and the other end is connected to the return air pipe 11. One end of the fan outlet pipe 14 is connected to the air outlet of the fan 2, and the other end is connected to the air conditioner outlet pipe 12. One end of the fan inlet pipe 15 is connected to the air inlet of the fan 2, and the other end is connected to the return air pipe 11.

[0029] Structure of the return air cage: The cross-sections of the return air cage 1 6, the return air cage 2 7 and the return air cage 3 8 are all hollow arches. The end of the return air cage 1 6 away from the return air cage 2 7 is sealed by a sealing plate, and the two ends of the return air cage 2 7 are sealed by sealing plates respectively.

[0030] Preferably, valves 16 are provided on the air conditioner outlet pipe 12, the fan outlet pipe 14, the air conditioner inlet pipe 13, and the fan inlet pipe 15 respectively.

[0031] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A cooling system for a grain silo, characterized in that: The system includes an integrated air conditioner (1) and a fan (2) installed on the outside of the grain warehouse. Horizontally installed air supply pipes (3) are installed on the inner side of each wall of the grain warehouse. Multiple vertically installed and closed-end cold air pipes (4) are connected to the bottom of the air supply pipes (3). The upper end of the cold air pipes (4) is connected to the air supply pipes (3), and multiple air outlet holes (5) are distributed on the side wall of the cold air pipes (4). Two or more parallel return air cages (6) are installed on the ground of the grain warehouse. One end of the return air cage (6) is closed, and the other end is connected through a return air cage (7). Both ends of the return air cage (7) are closed. A return air cage (8) is connected to the return air cage (7). One end of the return air cage (8) is connected to the return air cage (7), and the other end is connected to the return air cage (7). The end is connected to the return air box (9) located inside the wall of the grain warehouse. The return air cage (6) is provided with multiple return air holes (10). The return air box (9) is provided with a return air pipe (11). The air outlet of the integrated air conditioner (1) is connected to the air conditioner air outlet pipe (12) extending into the grain warehouse, and the air inlet is connected to the air conditioner air inlet pipe (13) extending into the grain warehouse. The air outlet of the fan (2) is connected to the fan air outlet pipe (14) extending into the grain warehouse, and the air inlet is connected to the fan air inlet pipe (15) extending into the grain warehouse. The air conditioner air outlet pipe (12) and the fan air outlet pipe (14) are both connected to the air supply pipe (3). The air conditioner air inlet pipe (13) and the fan air inlet pipe (15) are both connected to the return air pipe (11).

2. The cooling system for a grain silo according to claim 1, characterized in that: The cooling system is provided in two sets, and the two integrated air conditioners (1) are set on opposite walls. The return air cages (6) of the two cooling systems are set in parallel. The air supply pipes (3) of the two cooling systems form a ring structure. The cold air pipes (4) are provided on the inner side of each wall of the grain warehouse.

3. The cooling system for a grain silo according to claim 1, characterized in that: One end of the air conditioner outlet pipe (12) is connected to the air outlet of the integrated air conditioner (1), and the other end is connected to one end of the air supply pipe (3). The other end of the air supply pipe (3) is connected to the cold air pipe (4). One end of the air conditioner inlet pipe (13) is connected to the air inlet of the integrated air conditioner (1), and the other end is connected to the return air pipe (11). One end of the fan outlet pipe (14) is connected to the air outlet of the fan (2), and the other end is connected to the air conditioner outlet pipe (12). One end of the fan inlet pipe (15) is connected to the air inlet of the fan (2), and the other end is connected to the return air pipe (11).

4. The cooling system for a grain silo according to claim 1, characterized in that: The cross-sections of the first (6), the second (7) and the third (8) of the return air cage are all hollow arches. The end of the first (6) away from the second (7) of the return air cage is sealed by a sealing plate, and the two ends of the second (7) of the return air cage are sealed by sealing plates respectively.

5. The cooling system for a grain silo according to claim 1, characterized in that: Valves (16) are respectively provided on the air conditioner outlet pipe (12), the fan outlet pipe (14), the air conditioner inlet pipe (13), and the fan inlet pipe (15).

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