A high-rise plant factory air stirring device and system

Abstract

A high-level plant factory air stirring device and system, comprising: a fan, a main air pipe connected in communication with the fan, at least two sections of areas distributed in layers along the longitudinal direction of the main air pipe, each section of area comprising a branch pipe connected in transverse communication with the main air pipe via a connecting pipe, the inner diameter of each branch pipe being smaller than that of the main air pipe, the aperture of the air outlet opening arranged along the longitudinal direction of the branch pipe away from the fan being smaller and the spacing being smaller as the distance from the fan is farther, and the free end of each branch pipe being closed. The system is provided with a plurality of layers of cultivation racks, and the high-level plant factory air stirring device described above is also provided in correspondence with the cultivation racks, wherein the main air pipe extends downward along the height direction of the high-level plant factory, the vertical height positions of the branch pipes correspond to the layers of the cultivation racks respectively, and the fixed frame is fixed to the top of the plant factory or the top of the cultivation rack. In this way, the problem of uneven air flow in the vertical space of the high-level plant factory can be effectively solved, and uniform air stirring of each layer can be achieved.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural engineering technology, specifically relating to an air mixing device and system suitable for high-rise plant factories. Background Technology

[0002] As facility agriculture develops towards high density and vertical integration, tall plant factories are widely used due to their advantages such as high space utilization and large yield. However, the vertical height of tall plant factories typically exceeds 3 meters, and traditional air conditioning devices mostly adopt a "single-pipe direct blowing" or "simple branch" structure, which has the following problems:

[0003] There is a large difference in wind speed between the upper and lower levels: the airflow attenuates quickly in the upper level area, and the wind speed is generally below 1m / s, while the wind speed in the lower level area is likely to exceed 4m / s, which cannot meet the optimal wind speed range of 2-3m / s required for plant growth.

[0004] Uneven air mixing: The vertical gradient difference between CO2 concentration and temperature causes the upper plants to grow slowly due to insufficient CO2, while the lower plants suffer leaf damage due to excessive wind speed.

[0005] Poor adaptability: Traditional air ducts are not designed for high-rise structures, the branch pipe layout is chaotic, it is difficult to adjust after installation, and the pipe fittings are mostly custom-made, which is costly and inconvenient to maintain.

[0006] To solve the above problems, it is necessary to develop a device that can adapt to the vertical structure of high-rise plant factories and achieve uniform air mixing. Utility Model Content

[0007] The purpose of this invention is to design and develop an air mixing device and system for high-rise plant factories, which can solve the problems of uneven air circulation and large differences in environmental parameters between different layers in the vertical space of high-rise plant factories, and ensure the consistency of the growth environment of multi-layer plants.

[0008] According to one aspect of the present invention, an air mixing device for a high-rise plant factory is provided, comprising: a fan, a main air duct connected in communication with the fan, at least two sections distributed longitudinally along the main air duct, each section including a branch pipe connected laterally to the main air duct via a connecting fitting, the inner diameter of each branch pipe being smaller than that of the main air duct, and as the branch pipe moves further away from the fan along the longitudinal direction of the main air duct, the diameter of the air outlets spaced longitudinally along the branch pipe becomes smaller and the spacing becomes smaller, and the free ends of each branch pipe are closed.

[0009] Preferably, the air mixing device for the high-rise plant factory further includes a fixing frame for fixing the fan, and the outlet of the fan is connected to the corresponding end of the main air duct through a corrugated hose.

[0010] Preferably, the main duct is divided into three sections along its longitudinal direction: an upper section, a middle section, and a lower section. Each section includes three pairs of branch pipes that are laterally connected to the left and right sides of the main duct via connecting fittings.

[0011] Preferably, the three branch pipes on each side of the upper section are formed with a hole diameter of 12mm, four holes per pipe, and a hole spacing of 467.5mm; the four branch pipes on each side of the middle section are formed with a hole diameter of 10mm, five holes per pipe, and a hole spacing of 327.5mm; the three branch pipes on each side of the lower section are formed with a hole diameter of 8mm, six holes per pipe, and a hole spacing of 297.5mm; the first and last ventilation holes on both ends of each branch pipe are separated from the edge of the end of the branch pipe by a predetermined distance.

[0012] Preferably, the spacing between each layer of branch pipes in each section is the same along the longitudinal direction of the main duct.

[0013] Preferably, the main duct and the branch duct are connected by a reducing fitting.

[0014] Preferably, the main duct and branch ducts are made of PVC pipes, and the distance from the fan outlet to the first layer of branch ducts in the first section area is greater than the spacing of each layer of branch ducts along the longitudinal direction of the main duct.

[0015] Preferably, the branch pipe is formed as a straight pipe or a bend.

[0016] Preferably, except for the main air duct which is connected to the branch pipes on the left and right sides via a reducing tee on the lowest floor, the main air duct is connected to the branch pipes on the left and right sides via a reduced cross-section on other floors.

[0017] According to one aspect of the present invention, an air mixing system for a high-rise plant factory is provided, comprising a multi-layer cultivation rack and the aforementioned air mixing device for a high-rise plant factory corresponding to the cultivation rack. The main air duct extends downward along the height direction of the high-rise plant factory, and the vertical height of each branch duct corresponds to the interlayer of the multi-layer cultivation rack. The fixing frame is fixed to the top of the plant factory or the top of the cultivation rack.

[0018] According to this utility model, through scientific duct layout and opening design, the wind speed of each layer is kept within the optimal range, ensuring the uniformity of plant growth. It can effectively solve the problem of uneven air circulation in the vertical space of high-rise plant factories, achieve uniform air mixing in each layer, and keep the wind speed stable at 2-3 m / s. It is suitable for the installation and use requirements of high-rise plant factories, and therefore can be applied to the field of air environment control equipment for high-rise plant factories.

[0019] To achieve the above objectives, the present invention adopts the following design scheme. Attached Figure Description

[0020] Figure 1A schematic diagram of the overall structure of the air mixing device in a high-rise plant factory is shown.

[0021] Figure 2 This shows a magnified view of the opening details of the branch pipe. Detailed Implementation

[0022] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present invention, enabling those skilled in the art to implement and use the present invention in various environments and for various applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, a limiting description of the scope of protection of the present invention. Furthermore, for ease of description, the dimensions of the various parts shown in the drawings are not necessarily drawn to actual scale. Orientation descriptions, such as left and right corresponding to the transverse direction perpendicular to the length of the main duct, and upper, lower, top, and bottom, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or partial structures will be omitted where they may cause confusion or make the understanding of the present disclosure difficult to observe. Unless otherwise specifically stated, the order and values ​​of the components and assembly steps described in the embodiments do not limit the scope of this utility model. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings and actual assembly process.

[0023] <Overall Composition of the Device>

[0024] An air mixing device for a high-rise plant factory mainly comprises four parts: a main air duct 1, branch pipes 2, a fan 3, and a fixed frame 4. These parts work together to achieve air delivery and uniform mixing.

[0025] Main duct 1: As the main channel for air transport, one end is connected to the fan 3, and the other end extends downward along the height of the high-rise plant factory. It is used to distribute the air output by the fan 3 to each branch duct 2 during the transport along the main channel.

[0026] Branch pipe 2: Distributed longitudinally along the main air duct 1, it is the "uniform output end" of air. The differentiated opening design ensures uniform air output in each layer. The vertical height of each branch pipe corresponds to the interlayer of the multi-layer cultivation rack, blowing towards the crops planted in the interlayer and increasing the air circulation speed around the crops.

[0027] Fan 3: Provides the air power source for the device. A centrifugal fan with an appropriate air volume can be selected to ensure that the airflow pressure meets the high-rise delivery requirements.

[0028] Fixing frame 4: Can be made of angle steel or aluminum alloy, and is fixedly connected to the top of the plant factory or the top of the cultivation rack to support and fix the entire device.

[0029] <Example: Structural Parameters of Key Components>

[0030] Main air duct 1: Adapted to the vertical height of the high-rise plant factory and matched with the height of the cultivation rack. For example, for a 12-meter high-rise plant factory, a standard PVC pipe is selected as the main air duct 1 with a diameter of φ90mm and a total length of 5200mm. At this time, the main air duct 1 is fixed to the top of the factory and extends downward or hangs down along the height of the high-rise plant factory until it is parallel to the cultivation rack erected from the ground (partially overlapping each other). The branch pipes 2 are then matched with the layers of the cultivation rack.

[0031] The distance from the outlet of fan 3 to the first-layer branch pipe 2 is 700mm to avoid uneven airflow in the branch pipe caused by turbulence when the airflow first enters the main air pipe 1. The spacing between the remaining branch pipes is 500mm.

[0032] Branch pipe 2: Distributed in 10 layers, with 10 on each side of the main air duct 1, for a total of 20 pipes, all made of PVC with a diameter of φ75mm; the length of each branch pipe on each side of each layer is 1800mm, and the total length on both sides of each layer is 3600mm. The end of the branch pipe is 1800mm away from the center of the reducing tee 5; the 20 branch pipes can be divided into three sections: 3 on each side of the upper section, 4 on each side of the middle section, and 3 on each side of the lower section, with a height difference of 500mm between adjacent branch pipes.

[0033] Branch pipe orifice design: Based on the attenuation law of airflow at higher altitudes, a differentiated design is adopted, with larger orifice diameters and fewer orifices in the upper section and smaller orifice diameters and more orifices in the lower section.

[0034] The upper section has three branch pipes on each side: 21 with a diameter of 12mm to compensate for the attenuation of airflow at higher levels. Each pipe has four holes with a hole spacing of 467.5mm.

[0035] The middle section has four branch pipes on each side: 22: orifice diameter 10mm, to balance airflow, each pipe has five holes, and the hole spacing is 327.5mm;

[0036] The lower section has three branch pipes on each side: 23 with an aperture of 8mm to reduce wind speed, each with six holes and a hole spacing of 297.5mm.

[0037] All branch pipe ends are sealed, and the distance from the first and last ventilation holes on the end side to the edge is a predetermined distance, for example, 163.5 mm. That is, the distance from the first ventilation hole 2a and the last ventilation hole 2a on both ends of each branch pipe 2 to the edge of the branch pipe end is 163.5 mm. When the corresponding ends of the main air duct 1 and the branch pipe 2 are actually installed at the column position of the cultivation rack, it can prevent the edge airflow from directly hitting the column of the cultivation rack and ensure that the air outlet direction is accurately directed to the plant growth area.

[0038] Connecting fittings: The connection between the main duct 1 and the branch duct 2 is made using a reducing tee 5 with a diameter of 90mm-75mm to bridge the diameter difference between the main duct 1 and the branch duct 2. This allows the branch ducts 2 to be distributed at intervals along the length of the main duct 1 and connected to the main duct 1.

[0039] <Example: Assembly Steps>

[0040] Step 1. Component Preparation

[0041] Main duct 1: Cut a 5200mm long φ90mm PVC pipe;

[0042] Branch pipe 2: Cut 10 φ75mm PVC pipes with a length of 3600mm, and classify them into "3 in the upper section, 4 in the middle section, and 3 in the lower section";

[0043] Connecting fittings: Prepare 10 sets of reducing tee 5 with a diameter of 90mm-75mm;

[0044] 1 centrifugal fan with appropriate air volume 3, several angle steels (for making a fixing frame 4); and

[0045] Drilling tools: one each of 12mm, 10mm and 8mm diameter hand drills, one set each of measuring tape and marker.

[0046] Step 2. Branch pipe hole drilling

[0047] Three branch pipes on each side of the upper section: Mark four hole positions with a marker pen according to "hole spacing 467.5mm, first and last hole distance from edge 163.5mm", and then drill holes with a 12mm diameter pistol drill.

[0048] Four branch pipes on each side of the middle section: Mark five hole positions according to "hole spacing 327.5mm, first and last hole distance from edge 163.5mm", and drill holes with a 10mm diameter pistol drill.

[0049] The lower section has 3 branch pipes on each side: mark 6 hole positions according to "hole spacing 297.5mm, first and last hole distance from edge 163.5mm", and drill holes with an 8mm diameter pistol drill.

[0050] After drilling the holes, clean the plastic debris inside the branch pipe to prevent abnormal noise or blockage during airflow. These holes are collectively referred to as ventilation holes 2a.

[0051] Step 3. Main duct segmentation

[0052] The main duct is cut into sections of equal length so that they can be connected to reducer tee 5 and finally form the main duct 1.

[0053] Step 4. Device Assembly

[0054] The main duct 1 is connected to the fan 3 in a connected manner: the outlet of the fan 3 is connected to one end of a section of the main duct 1 through a corrugated hose 6 to ensure a seal, which can be achieved by wrapping with sealing tape; the fan 3 is installed on the fixed frame 4 to keep the section of the main duct 1 in a vertical state. By setting the corrugated hose 6, a flexible connection can be achieved, which improves the fault tolerance rate of the fan and duct installation.

[0055] Connection between main duct 1 and branch duct 2: Along the length of this section of main duct 1, starting from 3500mm away from the fan, connect the sections of main duct 1 one by one by installing reducing four-way valve 5 and connecting it to branch duct 2, so that the height difference between adjacent branch ducts is 500mm, and ensure that there is no air leakage at the joint. PVC pipe special glue can be applied for fixing.

[0056] Installation of fixing frame 4: Use angle steel to make an "L" shaped fixing frame 4. One end of the fixing frame 4 is connected to the fan 3, and the other end of the fixing frame 4 is bolted to the plant factory column.

[0057] <Work Process>

[0058] After the fan 3 is started, air is pressurized by the fan 3 and enters the main air duct 1, and is vertically transported to each branch duct 2 along the main air duct 1. The airflow is evenly distributed in the branch duct 2 and discharged through ventilation holes 2a of different diameters. Because the opening parameters are adapted to the airflow attenuation law of high-rise buildings, the air velocity at the air outlet of each floor is stable at 2-3 m / s. The discharged airflow forms a circulation and stirring in each layer of the plant factory, so that the CO2 concentration and temperature are kept consistent in the vertical direction, meeting the needs of plant growth. The above, together with the attached figure, illustrates the left and right symmetrical arrangement of the branch duct 2. However, it is not limited to this and can also be designed in an asymmetrical form according to the length of the cultivation rack.

[0059] According to this invention, during operation, the fan 3 delivers air into the main air duct 1, which is then evenly discharged through the openings in the branch pipe 2, achieving efficient and uniform air mixing across all layers of the high-rise plant factory and ensuring a consistent plant growth environment. This design is adaptable to the vertical spatial structure of high-rise plant factories, achieving uniform air mixing across all layers through layered branch pipes and differentiated opening designs.

[0060] The above example illustrates the current three sections, but it is not limited to this. Other sections can be added depending on the height of the column, or only two sections can be set, and the opening spacing can be adjusted accordingly.

[0061] The above example shows the main air duct 1, which is fixed at the top by the fixing bracket 4 and suspended by the flexible corrugated hose 6. The lower end of the main air duct 1 does not need to be fixed and can be directly fixed to the cultivation rack of the plant factory using the main air duct 1 or each branch pipe 2.

[0062] The above example illustrates that both left and right branch pipes 2 are straight pipes, each utilizing ventilation holes 2a as air outlets to evenly distribute air to the plant growth spaces within each cultivation rack. However, this is not a limitation. Depending on the form of the cultivation rack, curved pipes, such as S-shapes, C-shapes, or spiral cross-shaped designs, can be used to extend the air outlets into or to the corresponding side cultivation rack or the plant growth spaces within the same cultivation rack.

[0063] The above example illustrates the fixing frame 4, but it is not limited to this. It can also be combined with or replaced by a structure that directly fixes the main air duct 1 and / or each branch pipe 2 to the corresponding part of the cultivation rack. For example, the main air duct 1 is tied to the upright, while the branch pipe 2 is tensioned by the upper and lower crossbeams of the cultivation rack located on the opposite side.

[0064] The above example illustrates branch pipes 2 connected in pairs via reducing tee 5; however, it is not limited to this, and reducing tee can also be used to install only the corresponding branch pipes. Figure 1 The branch pipes 2 in each section extend alternately to the left and right sides, in the middle right side or the right side half-side structure, or in at least two sections distributed longitudinally along the main duct 1.

[0065] The above embodiments can be fine-tuned without departing from the scope of this utility model. Therefore, the structures shown in the above description and drawings should be considered illustrative and not intended to limit the scope of protection of this utility model patent application. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. Unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. Although this utility model has been described with reference to various specific embodiments, it should be understood that modifications can be made within the spirit and scope of the described inventive concept. Therefore, it is intended that this utility model is not limited to the described embodiments, but will have the full scope defined by the language of the appended claims.

Claims

1. An air mixing device for a high-rise plant factory, characterized in that, include: The fan (3), the main air duct (1) connected in communication with the fan (3), and at least two sections distributed in layers along the longitudinal direction of the main air duct (1), each section including a branch pipe (2) connected in a transverse direction to the main air duct (1) via a connecting fitting, the inner diameter of each branch pipe (2) being smaller than that of the main air duct (1), and as the fan (3) moves further away from the fan (1) along the longitudinal direction of the main air duct (1), the diameter of the air outlets opened in the branch pipe (2) along the longitudinal direction becomes smaller and the spacing becomes smaller, and the free ends of each branch pipe (2) are closed.

2. The air mixing device for high-rise plant factories according to claim 1, characterized in that, It also includes a mounting bracket (4) for fixing the fan (3), and the outlet of the fan (3) is connected to the corresponding end of the main air duct (1) via a corrugated hose (6).

3. The air mixing device for high-rise plant factories according to claim 1, characterized in that, There are three sections distributed longitudinally along the main air duct (1): the upper section, the middle section and the lower section. Each section includes three pairs of branch pipes (2) that are laterally connected to the left and right sides of the main air duct (1) via connecting fittings.

4. The air mixing device for high-rise plant factories according to claim 3, characterized in that, The upper section has three branch pipes on each side, each with four holes and a hole spacing of 467.5 mm. The middle section has four branch pipes on each side, each with five holes and a hole spacing of 10 mm. The lower section has three branch pipes on each side, each with six holes and a hole spacing of 297.5 mm. The first and last ventilation holes on both ends of each branch pipe are separated from the edge of the end of the branch pipe by a predetermined distance.

5. The air mixing device for high-rise plant factories according to claim 3, characterized in that, The spacing between each branch pipe in each section area along the longitudinal direction of the main air duct (1) is the same.

6. The air mixing device for high-rise plant factories according to claim 1, characterized in that, The main duct (1) and the branch duct (2) are connected by a reducing pipe fitting.

7. The air mixing device for high-rise plant factories according to claim 1, characterized in that, The main duct (1) and branch duct (2) are made of PVC pipe. The distance from the outlet of the fan (3) to the first layer of branch duct (2) in the first section area is greater than the longitudinal spacing of each layer of branch duct along the main duct (1).

8. The air mixing device for a high-rise plant factory according to claim 1, characterized in that, Branch pipe (2) is formed as a straight pipe or a bend.

9. The air mixing device for a high-rise plant factory according to claim 3, characterized in that, Except for the branch pipes (2) on the left and right sides via a reducing tee on the lowest floor, the main air duct (1) is connected to the branch pipes (2) on the left and right sides via a reduced tee on other floors by cut-off pipe sections via a reducing cross.

10. An air mixing system for a high-rise plant factory, comprising multi-layer cultivation racks, characterized in that, The high-rise plant factory air mixing device according to any one of claims 1 to 9 is also provided in correspondence with the cultivation rack, wherein the main air duct (1) extends downward along the height direction of the high-rise plant factory, the vertical height of each branch pipe corresponds to the interlayer of the multi-layer cultivation rack, and the fixing frame (4) is fixed to the top of the plant factory or cultivation rack.

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