Pneumatic circulating water cultivation equipment

Abstract

The present invention discloses a pneumatic circulation hydroponic equipment, comprising: a plurality of cavities for containing nutrient solution, at least two pneumatic drive structures arranged in the cavities; at least two pneumatic drive structures include a liquid inlet end that can be connected to another cavity, an air inlet end that can be connected to an air source, and an outlet end; the outlet end is located above the liquid inlet end and the air inlet end, and the outlet end is arranged upward, the liquid inlet end, the air inlet end and the outlet end are internally connected, and the outlet end is used to mix the liquid input by the liquid inlet end and the gas from the air inlet end and then output; the highest point of any outlet end is lower than the lowest liquid level of the corresponding cavity. The present invention can eliminate the liquid level difference caused by the flow of nutrient solution in different cavities, thereby eliminating the limitation on the number of planting units or cavities connected in series in the prior art. The traditional water pump structure is eliminated, and energy consumption is reduced. The stability of the hydroponic equipment is improved.

Description

Technical Field

[0001] The invention relates to the field of soilless cultivation, in particular to pneumatic circulating water cultivation equipment. Background Art

[0002] Hydroponic equipment is a special equipment for soilless cultivation. The power for the circulation of nutrient solution between the planting units of existing hydroponic equipment is provided by a water pump. When the driving force is traditionally provided by a water pump, there is a large liquid level difference between the proximal and distal ends of the nutrient solution circulation path. In order to avoid the negative impact of the large liquid level difference on planting, the number of planting units connected in series is limited, so that under normal circumstances, there are no more than 20 planting units. In addition, the water pump uses electricity as an energy source during use. On the one hand, there is a waste of energy, and on the other hand, there is a hidden danger of leakage. Generally, a set of hydroponic equipment is equipped with a circulating power water pump. Once the water pump fails, the entire hydroponic equipment will not be able to be used normally, making the possibility of failure of the hydroponic equipment higher. Summary of the invention

[0003] In order to overcome the defects in the prior art, an embodiment of the present invention provides a pneumatic circulating water cultivation device, which is used to solve the problem that the number of planting units is limited due to the liquid level difference between the above-mentioned planting units.

[0004] The embodiment of the present application discloses: a pneumatic circulating water cultivation equipment, comprising: a plurality of cavities for containing nutrient solution, at least two pneumatic driving structures arranged in the cavities; the at least two pneumatic driving structures include a liquid inlet end that can be connected to another cavity, an air inlet end that can be connected to an air source, and an outlet end; the outlet end is located above the liquid inlet end and the air inlet end, and the outlet end is arranged upward, the liquid inlet end, the air inlet end and the outlet end are internally connected, and the outlet end is used to mix the liquid input by the liquid inlet end and the gas at the air inlet end and then output; the highest point of any outlet end is lower than the lowest liquid level of the cavity corresponding to it.

[0005] Furthermore, a liquid inlet end of the pneumatic drive structure in one of the cavities is communicated with the liquid storage tank.

[0006] Furthermore, a detection system is provided in one of the cavities, and the detection system is connected with the mother liquid adding device and the water adding device.

[0007] Furthermore, it includes an outer shell, wherein a plurality of partitions are arranged in the outer shell, and a plurality of cavities arranged in sequence are formed between each partition and the outer shell. The partition is provided with perforations, and the liquid inlet end of the pneumatic driving structure is connected to another cavity through the perforations of the partition.

[0008] Furthermore, a liquid level valve for controlling the liquid level of the nutrient solution is included.

[0009] Furthermore, the liquid inlet end, the gas inlet end and the outlet end form a T-shape.

[0010] Furthermore, at least one pneumatic driving structure includes a body, and the outlet end, the liquid inlet end and the air inlet end are all arranged on the body, and the outlet end can rotate relative to the body, thereby changing the angle formed between the outlet end and the vertical direction.

[0011] Furthermore, the liquid inlet end is set to have a large diameter, and the outlet port diameter is smaller than the diameter of the liquid inlet end.

[0012] Further, the hydroponic planting unit is provided with a removable insulation layer.

[0013] Furthermore, a cover with planting holes for fixing plants is installed on the upper part of the hydroponic planting unit.

[0014] The beneficial effects of the present invention are as follows:

[0015] By changing the original water pump to provide the circulation power of the nutrient solution to a pneumatic drive structure, the liquid inlet form when the water pump was originally installed is changed to the current gas and liquid mixed inlet form, and the original single circulation power source provided by the water pump is changed to a multi-point distributed power source provided by the pneumatic drive structure, which can eliminate the liquid level difference caused by the flow of the nutrient solution in different cavities, thereby eliminating the limitation on the number of planting units or cavities connected in series in the prior art. Since the pneumatic drive structure is distributed in each cavity, the same power can be provided in each cavity, so that the liquid level of the nutrient solution in each cavity is the same, thereby eliminating the liquid level difference, and increasing the number of cavities that can be connected. The water pump in the original hydroponic planting equipment is used to provide the circulation power of the nutrient solution, and the air pump is used to provide the aeration gas. The use of the pneumatic drive structure in the present application can achieve the function of providing the circulation power of the nutrient solution and providing the aeration gas with only the air pump. The pneumatic drive structure is used as an oxygenation device to drive the circulation of the nutrient solution, eliminating the traditional water pump structure and reducing energy consumption. Since the pneumatic drive structure is included in multiple cavities at a multi-point arrangement, when an aeration head of a single aeration head pneumatic drive structure fails, the equipment can still be used normally, thereby improving the stability of the hydroponic equipment.

[0016] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic diagram of the internal structure of the cavity in an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of the pneumatic driving structure in an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the disassembled structure of the pneumatic driving structure in an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the pneumatic circulating water cultivation equipment with a liquid storage tank in an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the pneumatic circulating water cultivation equipment without liquid storage tank in an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the disassembled structure of the trough-type cavity in an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the pneumatic circulation water cultivation equipment of the trough unit in the embodiment of the present invention;

[0025] Figure 8 is a schematic structural diagram of a thermal insulation layer of a planting unit in an embodiment of the present invention;

[0026] Fig. 9 is a schematic structural diagram of a cover in an embodiment of the present invention;

[0027] The figure numbers of the above drawings are: 1. cavity; 2. pneumatic drive structure; 21. liquid inlet end; 22. air inlet end; 23. outlet end; 231. conduit; 3. aeration head; 4. air supply pipe; 5. connecting pipe; 6. liquid inlet pipe; 7. liquid return pipe; 8. insulation layer; 9. cover; 10. detection system; 11. mother liquor adding device; 12. water adding device; 13. outer shell; 14. partition; 15. perforation; 16. planting hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 9 As shown, the pneumatic circulating water cultivation equipment of this embodiment includes:

[0030] A plurality of cavities 1 are used to contain nutrient solution that enables the cultivated plants in the cavities 1 to survive or grow normally. The cavity 1 may be a rectangular parallelepiped structure including a bottom surface and surrounding side walls connected thereto, thereby providing space for placing the nutrient solution. Of course, in other optional embodiments, the shape of the cavity 1 may be adjusted according to actual needs.

[0031] The pneumatic drive structure 2 includes a liquid inlet end 21 that can be communicated with another cavity 1, an air inlet end 22 that can be communicated with an air source, and an outlet end 23. In the present embodiment, the liquid inlet end 21 is a liquid inlet device composed of a hollow cylindrical pipe and a joint that can be airtightly fitted therewith. Of course, the liquid inlet end 21 can also be other structures that can allow the nutrient solution flowing therein to pass through. The air source connected to the air inlet end 22 includes an aeration head 3, an air supply pipe 4, and an air pump (not shown in the figure). One end of the aeration head 3 is sealed and connected to the air supply pipe 4 connected to the air pump, and the other end of the aeration head 3 is sealed and connected to the air inlet end 22, so that the amount of gas in the aeration process is large, increasing the oxygen content in the nutrient solution after aeration. Preferably, the gas in the air pump is air. Of course, pure oxygen or other gases that can be used for aeration can also be used in the air pump.

[0032] In this embodiment, the outlet end 23 is located above the liquid inlet end 21 and the gas inlet end 22, and the outlet end 23 is arranged upward. The liquid inlet end 21, the gas inlet end 22 and the outlet end 23 are internally connected, and the outlet end 23 is used to mix the liquid input from the liquid inlet end 21 and the gas input from the gas inlet end 22 and then output. The highest point of any outlet end 23 is lower than the lowest liquid level of the corresponding cavity 1, and the specific liquid level height of the lowest liquid level can be adjusted according to actual needs.

[0033] By means of the above structure, the nutrient solution enters the liquid inlet end 21 and mixes with the gas input from the air inlet end 22 to form a new aerated nutrient solution. Due to the fierce aeration at the location of the aeration head 3, the water surface is significantly higher than the surrounding water surface. Due to the presence of gas, the effective density of the nutrient solution in the area where the aeration head 3 is located is reduced, and the product of the gravitational acceleration and the water depth is also reduced accordingly, that is, the pressure is reduced. When the local pressure is reduced, the fluid pressure of the nutrient solution will drive the surrounding nutrient solution to flow in, so that the local nutrient solution depth increases, thereby achieving balance. The pipeline structure of the pneumatic drive structure 2 further enhances this effect, so that gas is injected into the pneumatic drive structure 2, the internal pressure of the pneumatic drive structure 2 decreases, and the nutrient solution rises, that is, an air lift process is realized. In this embodiment, a plurality of cavities 1 with pneumatic drive structures 2 are connected in series, so as to achieve the effect of circulation and aeration of the nutrient solution between different cavities 1. The aeration head 3 is separated from the outlet end 23, so that the aeration head 3 does not appear in the flow path of the nutrient solution, which can reduce the swirl and blockage in the nutrient solution, avoid the interference of the aeration head 3 on the flow of the nutrient solution, thereby increasing the flow rate of the nutrient solution and making the circulation of the nutrient solution smoother. The pneumatic drive structure 2 is distributed in each cavity 1. When the aeration head 3 of an individual cavity 1 has a fault such as the air pipe falling off or the aeration head being blocked, due to the liquid level difference between the cavity 1 with the fault and the upstream cavity 1, the liquid inlet end 21 of the cavity 1 with the fault and the connecting port of the upstream cavity 1 connected thereto are lower than the lowest liquid level of the upstream cavity 1, so that the nutrient solution can flow from the upstream cavity 1 along the liquid inlet end 21 into the cavity 1 with the fault of the aeration head 3 by means of liquid pressure. The downstream cavity 1 can circulate the nutrient solution from the cavity 1 with the fault of the aeration head 3 to the downstream cavity 1 by means of the pneumatic drive device 2. The whole process ensures that even if some aeration heads 3 fail, the flow of the nutrient solution in the entire pneumatic circulation hydroponic equipment will not be affected.

[0034] By adopting the above embodiment, the original water pump providing the circulation power of the nutrient solution is changed to be provided by the pneumatic driving structure 2, so that the liquid inlet form when the water pump is installed is changed to the current gas and liquid mixed inlet form, and the original single circulation power source provided by the water pump is changed to a multi-point distributed power source provided by the pneumatic driving structure 2, which can eliminate the liquid level difference caused by the flow of the nutrient solution in different cavities 1, thereby eliminating the limitation on the number of planting units or cavities 1 connected in series in the prior art. Since the pneumatic driving structure 2 is distributed in each cavity 1, the same power can be provided in each cavity 1, so that the liquid level of the nutrient solution in each cavity 1 is the same, thereby eliminating the liquid level difference, and increasing the number of cavities 1 that can be connected. The water pump in the original hydroponic planting equipment is used to provide the circulation power of the nutrient solution, and the air pump is used to provide the aeration gas. The use of the pneumatic driving structure 2 in the present application can achieve the function of providing the circulation power of the nutrient solution and providing the aeration gas with only the air pump. The pneumatic drive structure 2 is used as an oxygenation device to drive the circulation of the nutrient solution, eliminating the traditional water pump structure and reducing energy consumption. Since the pneumatic drive structure 2 is arranged at multiple points in multiple cavities 1, when a single aeration head 3 of the pneumatic drive structure 2 fails, the equipment can still be used normally, thereby improving the stability of the hydroponic equipment.

[0035] Specifically, refer to Figure 4 As shown, this embodiment provides a pneumatic circulating water cultivation equipment with a liquid storage tank. The liquid inlet end 21 of the pneumatic driving structure 2 in one cavity 1 is connected to the liquid storage tank (not shown in the figure) through a liquid inlet pipe 6, and the liquid storage tank contains nutrient solution that can enable the cultivated plants to survive or grow normally. The liquid inlet pipe 6 connected to the liquid storage tank is located at one end of the cavity 1 and can be provided with a liquid level valve (not shown in the figure), and the liquid level valve and the liquid inlet pipe 6 can be connected by a threaded connection or other fixed connection methods. Preferably, the liquid level valve is a float valve with a long arm, so that according to the lever principle, when the liquid level rises, even if the buoyancy of the nutrient solution in the cavity 1 is low, a large closing force can be provided to close the float valve, so that the liquid inlet pipe 6 stops adding nutrient solution to the cavity 1. When the liquid level drops, the float valve opens, and the nutrient solution flows from the liquid inlet pipe 6 into the cavity 1. In another cavity 1 away from the cavity 1 connected to the liquid reservoir by the liquid inlet end 21 of the pneumatic driving structure 2, there is a liquid return pipe 7 connected to the liquid reservoir, and the liquid return pipe 7 can be provided with an overflow port for returning the nutrient solution in the system to the liquid reservoir. Preferably, the cavity 1 connected to the liquid reservoir by the liquid inlet end 21 of the pneumatic driving structure 2 and the cavity 1 with the liquid return pipe 7 are respectively located at the front and rear ends of the pneumatic circulating hydroponic equipment, and there is no communication between the two cavities 1, so that the nutrient solution can flow from the liquid reservoir into the hydroponic equipment and then flow into the liquid reservoir again through the liquid return pipe 7, thereby realizing the circulation of the nutrient solution.

[0036] Specifically, refer to Figure 5 As shown, this embodiment provides a pneumatic circulating water cultivation equipment without a liquid storage tank. Each cavity 1 is connected by the liquid inlet end 21 of the pneumatic drive structure 2, so that the nutrient solution can flow in each cavity 1. A detection system 10 is provided in one of the cavities 1 for detecting the concentration index in the nutrient solution. Preferably, the detection system 10 is located downstream of the mother liquid adding device, so that the concentration of the nutrient solution can be corrected in time, so that the concentration of the nutrient solution is maintained within a range that allows the cultivated plants to grow normally. The detection system 10 is electrically connected to the mother liquid adding device 11, and the mother liquid adding device 11 and the water adding device 12 are fixedly connected to the cavity 1 in the pneumatic circulating water cultivation equipment. The water adding device 12 is located at one end of the cavity 1 and a liquid level valve (not shown in the figure) can be provided, and the liquid level valve and the liquid inlet pipe 6 can be connected by a threaded connection or other fixed connection methods. Preferably, the liquid level valve is a float valve with a long arm, so that according to the lever principle, when the liquid level rises, even if the buoyancy of the nutrient solution in the cavity 1 is low, a large closing force can be provided to close the float valve, so that the water adding device 12 stops taking in water. When the liquid level drops, the float valve opens, and water flows from the water adding device 12 into the cavity 1. The mother liquid adding device 11 can be used to place concentrated nutrient solution or other agents, so that when the detection system 10 detects that the concentration of the nutrient solution in the pneumatic circulating water cultivation equipment decreases, the mother liquid adding device 11 can be used to adjust the concentration of the nutrient solution in the pneumatic circulating water cultivation equipment.

[0037] By means of the above structure, the concentration index selects conductivity and pH value as measurement objects. After the detection system 10 detects that the conductivity of the nutrient solution in the cavity 1 of the pneumatic circulating hydroponic equipment decreases during use, the electrical signal is transmitted to the mother liquid adding device 11, and the mother liquid adding device 11 adds concentrated nutrient solution to the cavity 1 until the conductivity is normal, so that the conductivity of the nutrient solution in the system can be maintained at a normal value. In addition, when the pH of the nutrient solution is alkaline during use, the nutrient solution detection system 10 can transmit an electrical signal to the mother liquid adding device 11, so that it releases an acidic agent into the cavity 1 to adjust the pH value of the pneumatic circulating hydroponic equipment. Of course, in other optional embodiments, the mother liquid adding device 11 can also release an alkaline agent when the nutrient solution is acidic, thereby adjusting the pH value of the pneumatic circulating hydroponic equipment.

[0038] By adopting the above embodiment, the pneumatic circulating water cultivation equipment can maintain the concentration of the nutrient solution within the range that allows the plants to grow normally without a liquid storage tank, thus saving the space required for the liquid storage tank. The pneumatic circulating water cultivation equipment can be used for planting even without a liquid storage tank, thus expanding the scope of use. In addition, the water adding device can automatically add water to the pneumatic circulating water cultivation equipment after the nutrient solution level in the pneumatic circulating water cultivation equipment decreases, which can be used to maintain the nutrient solution level.

[0039] Specifically, refer to Figure 7 As shown, the present embodiment provides a pneumatic circulating water cultivation equipment of a trough-type unit. It comprises an outer shell 13, a plurality of partitions 14 are arranged in the outer shell 13, and a plurality of cavities 1 arranged in sequence are formed between the partitions 14 and the outer shell 13. The shape of the outer shell 13 can be a trough-type structure with vertical sides and horizontal bottom, so as to provide a relatively flat accommodation space for the nutrient solution. Of course, the shape and size of the outer shell 13 can be adjusted according to actual needs. The material of the outer shell 13 and the partition 14 is generally a foam board, and wooden boards can also be used for splicing. Preferably, a plastic film is laid on the outer shell 13, which can not only isolate water, but also make the pneumatic circulating water cultivation equipment in this embodiment have a heat insulation effect, thereby reducing energy consumption.

[0040] In a preferred embodiment, Figure 6 As shown, the partition 14 is provided with a perforation 15, and the liquid inlet end 21 of the pneumatic drive structure 2 passes through the perforation 15 of the partition 14 to communicate with another adjacent cavity 1. The outlet end 23 of the pneumatic drive structure 2 can be tilted upward, thereby reducing the height of the shell 13 and saving the material of the shell 13. The end of the air supply pipe 4 away from the aeration head 3 extends upward from the highest point of the shell 13, thereby avoiding opening a hole in the shell 13, making the shell 13 more complete. With the above structure, the nutrient solution flows into each cavity 1 through the liquid inlet end 21 of each pneumatic drive structure 2.

[0041] Specifically, refer to Figures 1 to 3 As shown, the liquid inlet end 21, the air inlet end 22 and the outlet end 23 form a T-shape, wherein the air inlet end 22 and the outlet end 23 are symmetrically arranged, and the liquid inlet end 21 is a port between the air inlet end 22 and the outlet end 23. By means of the above structure, the air entering the aeration port can be in the same vertical direction as the outlet end 23, and the outlet end is placed upward, which is conducive to promoting the flow of the liquid. Of course, the liquid inlet end 21, the air inlet end 22 and the outlet end 23 are Y-shaped or other three-way structures, wherein the outlet end 23 is located above the liquid inlet end 21 and the outlet end 22, and the outlet end 23 opens upward or obliquely upward.

[0042] Specifically, refer to Figure 1As shown, the angle between the outlet end 23 and the vertical direction can be adjusted around the liquid inlet end 21, that is, the angle between the entire pneumatic drive structure 2 and the vertical direction is changed by rotating the liquid inlet end 21, thereby adjusting the angle between the outlet end 23 and the vertical direction. This is conducive to using the impact of bubbles to perform or prevent "root pruning" on the roots of plants according to different plants planted and different planting stages. A plurality of connecting pipes 5 are arranged between each pneumatic drive structure 2 and the corresponding cavity 1. The connecting pipe 5 can be a hollow pipe or other structure that can make the nutrient solution flow, which is used to make the nutrient solution flow between the cavity 1 and the pneumatic drive structure 2. Preferably, the connecting pipe 5 in contact with the cavity 1 adopts a hollow composite pipe composed of an internal thread and an external thread, so that it can be fixed on the cavity 1. The heights of at least two connecting pipes 5 are the same. Since the connecting pipe 5 is used to circulate the nutrient solution, the nutrient solution in the cavity 1 can maintain a stable liquid level.

[0043] Specifically, refer to Figures 2 to 3 As shown, the liquid inlet 21 can be selected with a large diameter to reduce the flow resistance of the nutrient solution. The outlet 23 is provided with a conduit 231, whose diameter is smaller than that of the liquid inlet 21. The aerated nutrient solution flowing out of the outlet 23 can obtain a better air lift effect after aeration.

[0044] Specifically, refer to Figure 8 As shown, the cavity 1 is provided with a removable insulation layer 8, which is arranged on the outside and upper part of the cavity 1. The insulation layer 8 can directly place the cavity 1 into the insulation layer 8, so that the insulation layer 8 can be easily removed when the insulation layer 8 is not needed. Preferably, the inside of the insulation layer 8 is the same size and shape as the outside of the cavity 1, so that the cavity 1 can fit closely with the insulation layer 8. A planting hole 16 for fixing the plant is opened in the upper area of ​​the cavity 1, and the cultivated plant is fixed in the cavity 1 through the planting hole 16.

[0045] Specifically, refer to Fig. 9 As shown, a cover 9 with planting holes 16 for fixing plants is installed on the upper part of the cavity 1. The shape of the cover 9 can be a plate-like structure with the same inner diameter as the upper surface of the cavity 1 or other structures that can cover the upper surface of the cavity 1. The existence of the cover 9 can fix the plant in the cavity 1, and the cover 9 is easy to disassemble and can be replaced when it is damaged or in other situations.

[0046] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A pneumatic circulating water cultivation equipment, characterized in that: include: A plurality of cavities for containing nutrient solution, and at least two pneumatic drive structures disposed in the cavities; At least two of the pneumatic driving structures include a liquid inlet end that can be communicated with another of the cavities, an air inlet end that can be communicated with an air source, and an outlet end; the outlet end is located above the liquid inlet end and the air inlet end, and the outlet end is arranged upward, the liquid inlet end, the air inlet end and the outlet end are internally communicated, and the outlet end is used to mix the liquid input from the liquid inlet end and the gas from the air inlet end and then output; The highest point of any of the outlet ends is lower than the lowest liquid level of the corresponding cavity; A liquid inlet end of the pneumatic driving structure in one of the cavities is connected to a liquid storage tank; At least one of the pneumatic driving structures comprises a body, the outlet end, the liquid inlet end and the air inlet end are all arranged on the body, and the outlet end can rotate relative to the body, thereby changing the angle formed between the outlet end and the vertical direction; A plurality of connecting pipes are arranged between each of the pneumatic driving structures and the corresponding cavity.

2. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: A detection system is arranged in one of the cavities, and the detection system is connected with the mother liquid adding device and the water adding device.

3. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: It comprises an outer shell, wherein a plurality of partitions are arranged inside the outer shell, and a plurality of cavities arranged in sequence are formed between each partition and the outer shell. The partition is provided with perforations, and the liquid inlet end of the pneumatic driving structure is connected with another cavity through the perforations of the partition.

4. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: Includes a level valve for controlling the nutrient solution level.

5. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: The liquid inlet end, the gas inlet end and the outlet end form a T-shape.

6. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: The liquid inlet end is configured to have a large diameter, and the outlet port diameter is smaller than the diameter of the liquid inlet end.

7. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: The cavity is provided with a removable thermal insulation layer.

8. The pneumatic circulating water cultivation equipment according to claim 1, characterized in that: A cover with planting holes for fixing plants is installed on the upper part of the cavity.

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