A kind of edge wall directional circulation temperature control system for flat warehouse

Abstract

The utility model discloses a kind of for bungalow warehouse's side wall directional circulation temperature control system, belong to grain storage technical field.This system includes bungalow warehouse main body with photovoltaic panel and double air conditioning refrigeration unit, and double air conditioning refrigeration unit contains first, second refrigeration air conditioner with photovoltaic panel electrical connection.The first refrigeration air conditioner is above grain heap by wind pipe, and the second refrigeration air conditioner is connected with the air supply main pipe in the inside of south warehouse wall in warehouse, air return main pipe, and the lower end of air supply main pipe, air return main pipe is respectively connected with air supply branch pipe and air return branch pipe of multiple root insertion grain heap, and branch pipe is equipped with air outlet hole, and grain heap surface is covered with grain surface film.This system is directly driven by photovoltaic, and the inside of south wall high-temperature grain layer is accurately cooled in conjunction with directional circulation pipe network, and it is matched with grain condition monitoring and ground cage emergency system, solve traditional system low efficiency, high cost, insufficient pertinence and other problems, reduce energy consumption and mildew pest risk, realize green grain storage.

Description

Technical Field

[0001] This utility model belongs to the field of grain storage technology, and in particular relates to a sidewall directional circulation temperature control system for flat warehouses. Background Technology

[0002] As a traditional grain storage facility, flat-roofed warehouses pose significant heat damage problems in the high temperatures of summer. In particular, the south-facing walls are affected by direct sunlight and radiative heat transfer, with temperatures within 30 centimeters of the south wall often reaching 30-33°C, creating localized high-temperature zones. In these areas, moisture migration due to temperature differences leads to a significantly higher risk of insect and mold growth and quality deterioration compared to other areas.

[0003] Traditional rooftop air conditioning systems can only create airflow circulation above the grain pile, failing to penetrate the grain pile to address the problem of deep grain temperature accumulation inside the silo walls. Overall cooling is inefficient, and the conventional electrically driven continuous cooling mode has high operating costs, failing to meet the requirements of green grain storage. While traditional ventilation floor cage systems can achieve whole-silo ventilation, the airflow distribution is uneven, and they are insufficiently targeted at the high-temperature zone inside the south wall. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a sidewall directional circulation temperature control system for flat warehouses.

[0005] The objective of this utility model can be achieved through the following technical solution: A sidewall directional circulation temperature control system for a flat warehouse, comprising a flat warehouse main body with photovoltaic panels on the roof, and a dual air conditioning refrigeration unit. The dual air conditioning refrigeration unit includes a first refrigeration air conditioner and a second refrigeration air conditioner, both electrically connected to the photovoltaic panels and installed on the south-facing outer wall of the flat warehouse main body. The first refrigeration air conditioner is provided with a first air supply pipe and a first air return pipe extending above the grain pile. The main air supply pipe and the main air return pipe are horizontally arranged on the inner side of the south-facing warehouse wall of the flat warehouse main body. The second refrigeration air conditioner is provided with a second air supply pipe and a second air return pipe respectively connected to the main air supply pipe and the main air return pipe. The lower ends of the main air supply pipe and the main air return pipe are respectively vertically connected to several air supply branch pipes and air return branch pipes inserted into the grain pile. The surface of the grain pile is covered with a grain surface film. Several air outlet holes are opened on the surface of the air supply branch pipes and the air return branch pipes.

[0006] Preferably, at least 10 supply air branch pipes and 10 return air branch pipes are provided, and the spacing between supply air branch pipes and return air branch pipes is ≤2 meters and evenly distributed.

[0007] Preferably, the diameter of the main air supply pipe and the main air return pipe is 190mm, and the diameter of the branch air supply pipe and the branch air return pipe is 110mm.

[0008] Preferably, the bottom of the main body of the flat warehouse is equipped with a mountain-shaped ventilation cage, the surface of which is covered with wire mesh to prevent grain from seeping in. The main body of the flat warehouse is equipped with an external pipe that connects the ventilation cage to an external movable cooling device, and an electromagnetic valve is installed on the external pipe.

[0009] Preferably, the system also includes grain condition temperature and humidity detection units buried in grain piles at various locations within the main body of the flat warehouse. Each grain condition temperature and humidity detection unit includes a detection cable and several temperature and humidity sensors distributed and connected to the detection cable. The grain condition temperature and humidity detection unit is connected to the dual air conditioning refrigeration unit and the solenoid valve signal.

[0010] Preferably, the supply air branch pipe and the return air branch pipe are inserted into the grain pile to a depth of at least 4 meters.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] By using photovoltaic direct-drive dual air conditioning and a directional circulation pipeline network architecture, the dense branch network accurately covers the high-temperature grain layer within 30cm of the south wall. The combination of the main air supply pipe and the air outlet of the main air supply pipe and the return air supply pipe and the return air branch pipe achieves low-resistance and efficient airflow penetration. Combined with the intelligent linkage of grain condition monitoring and the ground cage emergency system, the problem of local high temperature on the south wall of the flat warehouse is completely solved. Compared with the traditional system, the energy consumption per ton of grain is reduced by more than 80%, and the mold rate and pest incidence rate are significantly reduced, achieving a dual breakthrough in green grain storage and quality assurance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall cross-sectional elevation of the main structure of the flat warehouse.

[0014] Figure 2 This is a schematic diagram of the horizontal cross-sectional structure of the main body of the flat warehouse.

[0015] In the diagram: 1. Main structure of the flat warehouse; 2. Photovoltaic panel; 3. Dual air conditioning unit; 31. First air conditioning unit; 311. First air supply duct; 312. First return air duct; 32. Second air conditioning unit; 321. Second air supply duct; 322. Second return air duct; 4. Main air supply duct; 41. Branch air supply duct; 42. Air outlet; 5. Main return air duct; 51. Branch return air duct; 6. Grain surface film; 7. Ventilation cage; 71. Wire mesh; 72. External connection pipe; 73. Solenoid valve; 8. Grain temperature and humidity detection unit; 81. Detection cable; 82. Temperature and humidity sensor. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1-2As shown, this embodiment provides a sidewall directional circulation temperature control system for a flat warehouse, including a flat warehouse body 1 with photovoltaic panels 2 on the roof. The system is characterized by further including a dual air conditioning unit 3. The dual air conditioning unit 3 includes a first air conditioning unit 31 and a second air conditioning unit 32, both electrically connected to the photovoltaic panels 2 and installed on the south-facing outer wall of the flat warehouse body 1. The first air conditioning unit 31 has a first air supply pipe 311 and a first air return pipe 312 extending above the grain pile. A main air supply pipe 4 and a main air return pipe 5 are horizontally arranged on the inner side of the south-facing warehouse wall of the flat warehouse body 1. The second air conditioning unit 32 has a second air supply pipe 321 and a second air return pipe 322 respectively connected to the main air supply pipe 4 and the main air return pipe 5. The lower ends of the main air supply pipe 4 and the main air return pipe 5 are vertically connected to several air supply branch pipes 41 and air return branch pipes 51 inserted into the grain pile. The surface of the grain pile is covered with a grain surface film 6. Several air outlet holes 42 are opened on the surface of the air supply branch pipes 41 and the air return branch pipes 51.

[0018] The working principle of this sidewall directional circulation temperature control system in practical applications is as follows:

[0019] During routine temperature control, the photovoltaic panel 2 prioritizes driving the second cooling air conditioner 32. The cold airflow enters the main air supply pipe 4 through the first air supply pipe 311 and is distributed to each air supply branch pipe 41. It then penetrates into the grain pile through the air outlet 42 on the air supply branch pipe 41. At the same time, the hot airflow in the grain pile within 30 cm inside the south wall enters the return air branch pipe 51 through the air outlet 42 on the return air branch pipe 51 and then converges into the return air main pipe 5. The second cooling air conditioner 32 extracts and discharges the hot airflow through the second return air pipe 322, thereby achieving heat exchange and precisely cooling the high-temperature grain layer within 30 cm inside the south wall.

[0020] Meanwhile, the first refrigeration air conditioner 31 maintains the temperature of the upper space of the grain pile at a set temperature (e.g., the temperature inside the silo is set at 15-20℃, not exceeding 25℃ in summer, and not lower than 10℃ in winter) through circulating cooling via the first air supply duct 311 and the first return air duct 312, thus suppressing condensation on the upper layer. The grain surface film 6 is used for heat preservation to prevent the loss of cold energy, to prevent condensation under the film, and to block oxygen from entering the grain pile, thereby suppressing grain respiration.

[0021] Both the first refrigeration air conditioner 31 and the second refrigeration air conditioner 32 adopt photovoltaic direct drive, which greatly reduces the annual power consumption per ton of grain.

[0022] At least 10 supply air branch pipes 41 and return air branch pipes 51 are provided, and the spacing between supply air branch pipes 41 and return air branch pipes 51 is ≤2 meters and evenly distributed.

[0023] The measured cold air diffusion radius R = 1.2-1.5 meters. The spacing between the supply air branch pipes 41 and the return air branch pipes 51 is reduced to ≤2 meters to ensure overlapping cold air diffusion and hot air suction radii between adjacent branch pipes. The dense supply air branch pipes 41 and return air branch pipes 51 extend the residence time of the cold air in the grain layer, improving heat exchange efficiency. The modular and expandable design allows for a proportional increase in the number of supply air branch pipes 41 and return air branch pipes 51 for every additional 10 meters of silo length, adapting to grain silos of different sizes.

[0024] The diameter of the main air supply pipe 4 and the main air return pipe 5 is 190mm, and the diameter of the branch air supply pipe 41 and the branch air return pipe 51 is 110mm.

[0025] The combination of a 190mm main pipe and a 110mm branch pipe is suitable for installation within a 30cm range on the inside of the south-facing side wall, reducing wind resistance and lowering the power requirements of the air conditioning fan.

[0026] Furthermore, in this embodiment, the bottom of the flat warehouse body 1 is provided with a mountain-shaped ventilation cage 7, the surface of the ventilation cage 7 is covered with a wire mesh 71 to prevent grain from seeping in, and the warehouse wall of the flat warehouse body 1 is provided with an external pipe 72 to connect the ventilation cage 7 with an external movable cooling device, and an electromagnetic valve 73 is configured on the external pipe 72.

[0027] It also includes grain condition temperature and humidity detection units 8 buried in the grain piles in various directions of the main body 1 of the flat warehouse. The grain condition temperature and humidity detection unit 8 includes a detection cable 81 and several temperature and humidity sensors 82 connected to the detection cable 81. The grain condition temperature and humidity detection unit 8 is connected to the dual air conditioning refrigeration unit 3 and the solenoid valve 73.

[0028] When the grain temperature and humidity detection unit 8 detects that the grain temperature or other locations 30cm from the south wall are consistently too high, the second refrigeration air conditioner 32 maintains its current operation and automatically opens the solenoid valve 73. The external mobile cooling equipment sends air upward from the bottom through the mountain-shaped ventilation cage 7, forming a vertical airflow through the grain, which forcibly reduces the overall temperature of the grain pile.

[0029] Furthermore, the air supply branch pipe 41 and the return air branch pipe 51 are inserted into the grain pile to a depth of at least 4 meters.

[0030] According to the "Standards for the Construction of Grain Warehouses", the height of the bulk flat warehouse should not be less than 6 meters, and the height of the packaged flat warehouse should not be less than 4.5 meters. In addition, the angle of sunlight changes with time. The supply air branch pipe 41 and the return air branch pipe 51 should be inserted into the grain pile to a depth of at least 4 meters to make the heat exchange coverage more comprehensive and avoid moisture migration caused by excessive local temperature difference in the grain pile.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A sidewall directional circulation temperature control system for a flat-roofed warehouse, comprising a flat-roofed warehouse body (1) with photovoltaic panels (2) on the roof, characterized in that, It also includes a dual air conditioning refrigeration unit (3), which includes a first refrigeration air conditioner (31) and a second refrigeration air conditioner (32) that are electrically connected to the photovoltaic panel (2) and are set on the south-facing outer wall of the main body of the flat warehouse (1). The first refrigeration air conditioner (31) is provided with a first air supply pipe (311) and a first return air pipe (312) extending to the top of the grain pile. The main air supply pipe (4) and the return air pipe (5) are horizontally arranged on the inner side of the south-facing warehouse wall of the main body of the flat warehouse (1). The second refrigeration air conditioner (32) is provided with a second air supply pipe (321) and a second return air pipe (322) that are respectively connected to the main air supply pipe (4) and the return air pipe (5). The lower ends of the main air supply pipe (4) and the return air pipe (5) are respectively vertically connected to several air supply branch pipes (41) and return air branch pipes (51) inserted into the grain pile. The surface of the grain pile is covered with a grain surface film (6). Several air outlet holes (42) are opened on the surface of the air supply branch pipes (41) and the return air branch pipes (51).

2. The sidewall directional circulation temperature control system for a flat warehouse according to claim 1, characterized in that, At least 10 supply air branch pipes (41) and return air branch pipes (51) are provided, and the spacing between supply air branch pipes (41) and return air branch pipes (51) is ≤2 meters and evenly distributed.

3. The sidewall directional circulation temperature control system for a flat warehouse according to claim 2, characterized in that, The diameter of the main air supply pipe (4) and the main air return pipe (5) is 190 mm, and the diameter of the branch air supply pipe (41) and the branch air return pipe (51) is 110 mm.

4. The sidewall directional circulation temperature control system for a flat warehouse according to claim 1, characterized in that, The main body (1) of the flat warehouse is equipped with a mountain-shaped ventilation cage (7) at the bottom of the warehouse. The surface of the ventilation cage (7) is covered with a wire mesh (71) to prevent grain from seeping in. The main body (1) of the flat warehouse is equipped with an external pipe (72) that connects the ventilation cage (7) to an external movable cooling device. The external pipe (72) is equipped with a solenoid valve (73).

5. A sidewall directional circulation temperature control system for a flat warehouse according to claim 4, characterized in that, It also includes grain temperature and humidity detection units (8) buried in the grain piles in various directions of the main body (1) of the flat warehouse. The grain temperature and humidity detection unit (8) includes a detection cable (81) and several temperature and humidity sensors (82) distributed and connected to the detection cable (81). The grain temperature and humidity detection unit (8) is connected to the dual air conditioning refrigeration unit (3) and the solenoid valve (73) by signal.

6. The sidewall directional circulation temperature control system for a flat warehouse according to claim 1, characterized in that, The supply air branch pipe (41) and return air branch pipe (51) are inserted into the grain pile to a depth of at least 4 meters.

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