Carbon dioxide fertilizing device in closed space for agricultural production

Abstract

The utility model relates to the field of carbon dioxide fertilization devices in agricultural production, in particular to a carbon dioxide fertilization device in an agricultural production closed space. The device comprises a plurality of small closed sheds arranged in an agricultural production closed space, carbon dioxide tanks are arranged outside the small closed sheds, carbon dioxide release pipes are arranged in the small closed sheds, and the outlet ends of the carbon dioxide tanks are communicated with the inlet ends of the carbon dioxide release pipes through gas conveying pipelines. A plurality of carbon dioxide fertilization release openings are formed in the carbon dioxide release pipe, the small closed shed comprises a shed body frame, the shed body frame is installed on the fixed frame through a lifting mechanism, and a side plastic film and a side film rolling device are installed on the side face of the shed body frame; the side plastic film is controlled to be unfolded and retracted through the side film rolling device so that the side face of the small closed shed can be opened and closed, and the moving direction corresponding to the unfolding and retracting of the side plastic film is arranged in the vertical direction. The device can improve the utilization efficiency of carbon dioxide.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of carbon dioxide fertilization device in agricultural production especially agricultural production closed space carbon dioxide fertilization device. BACKGROUND

[0002] Agricultural production closed space is a protective device that provides more favorable environmental conditions for plant growth, mainly including glass greenhouse, continuous roof greenhouse, simple greenhouse, sunlight greenhouse, plant factory and the like. Carbon dioxide gas fertilizer is often applied in the process of plant growth. For example, the patent document with the announcement number CN217657363U discloses an automatic greenhouse with carbon dioxide supplement, which comprises a greenhouse body, a small shed and a mounting column are arranged in the greenhouse body, the mounting column is located on the right side of the small shed, an intelligent controller is arranged on the left side wall of the mounting column, a pair of carbon dioxide transmission pipes are arranged in the small shed, the carbon dioxide transmission pipes are respectively communicated with external carbon dioxide tanks, a connecting pipe is communicated with the lower end of each carbon dioxide transmission pipe, a release head is arranged at the lower end of each connecting pipe, an electromagnetic valve is arranged on each connecting pipe, and a carbon dioxide concentration sensor is arranged in the small shed. The small shed reduces the space for plant growth, the carbon dioxide is gathered in the small shed, which is beneficial to plant photosynthesis and reduces the waste of carbon dioxide. However, the small shed of the scheme is designed in a fixed structure, which cannot be adjusted according to the actual growth height of plants, and can only be designed according to the maximum growth height of plants, so that the utilization efficiency of carbon dioxide cannot be maximized. Moreover, the small shed is always in a closed state, but in the actual agricultural production process, the application process of carbon dioxide gas fertilizer usually only occupies a small part of a day, and the long-time closed state is not conducive to the normal growth of most plants. In addition, the carbon dioxide source is a conventional carbon dioxide tank, which needs to be purchased from outside. The existing industrial collected and treated carbon dioxide has high requirements for safety management during transportation and storage, and has the problem of not being convenient to use to some extent. SUMMARY

[0003] The utility model solves the technical problem that a kind of agricultural production closed space carbon dioxide fertilization device that can improve carbon dioxide utilization efficiency is provided.

[0004] The utility model discloses a technical scheme that solves its technical problem is: agricultural production sealed space carbon dioxide fertilization device, including the agricultural production sealed space inside a plurality of sealed small sheds that set up, and the sealed small shed outside is provided with carbon dioxide tank, and the sealed small shed is provided with carbon dioxide release pipe, and the import end of carbon dioxide tank is connected with the import end of carbon dioxide release pipe through gas pipeline and communicates, and a plurality of carbon dioxide fertilization release ports are provided on carbon dioxide release pipe, and the sealed small shed includes shed body frame, and the shed body frame is installed on the fixed frame through the lifting mechanism, and the side plastic film and the side film rolling device are installed on the side of shed body frame, and the expansion and retraction of side plastic film are controlled through the side film rolling device to realize the opening and closing of the sealed small shed side, and the expansion and retraction of side plastic film correspond to the movement direction along the vertical setting.

[0005] Further preferred scheme is, the lifting mechanism includes the vertical rack fixedly arranged on the shed body frame and the drive motor fixedly arranged on the fixed frame, and the output shaft of drive motor is connected with the vertical rack through the gear and forms the transmission, and the top plastic film and the top film rolling device are installed on the top of shed body frame, and the expansion and retraction of top plastic film are controlled through the top film rolling device to realize the opening and closing of the sealed small shed top.

[0006] Further preferred scheme is, the carbon dioxide release pipe corresponding carbon dioxide delivery pipeline is provided with solenoid valve and gas flow controller, and the sealed small shed is provided with carbon dioxide concentration sensor, and solenoid valve, gas flow controller and carbon dioxide concentration sensor are electrically connected to control system.

[0007] Further preferred scheme is, the carbon dioxide release pipe extends along the length direction of sealed small shed and is arranged, and the carbon dioxide fertilization release port on carbon dioxide release pipe is connected with carbon dioxide release head through intermediate connecting pipe respectively, and the intermediate connecting pipe is arranged at intervals along the length direction of carbon dioxide release pipe, and solenoid valve and gas flow controller are all provided on intermediate connecting pipe, and the sealed small shed is provided with a plurality of carbon dioxide concentration sensors along its long axis direction at intervals.

[0008] Further preferred scheme is, the import end of carbon dioxide tank is connected with carbon dioxide capture device through gas transmission system, and carbon dioxide capture device is arranged outside the agricultural production sealed space, and carbon dioxide capture device includes carbon dioxide capture box, and carbon dioxide capture material is arranged in carbon dioxide capture box, and carbon dioxide capture box is provided with carbon dioxide release element, and carbon dioxide release element is heating element or humidifying element or heating and humidifying element, and carbon dioxide capture box is provided with capture box carbon dioxide release port for connecting the import end of gas transmission system, and control valve is arranged in capture box carbon dioxide release port, and carbon dioxide capture box is provided with ventilation system for carrying out gas exchange with external atmosphere.

[0009] Further preferably, the ventilation system comprises a first air duct, a second air duct, a third air duct and a fourth air duct, the carbon dioxide capturing box has a first side and a second side arranged oppositely, the first air duct and the second air duct are both communicated with the first side of the carbon dioxide capturing box, the third air duct and the fourth air duct are both communicated with the second side of the carbon dioxide capturing box; one end of the first air duct, the second air duct, the third air duct and the fourth air duct away from the carbon dioxide capturing box is communicated with the external atmosphere, and a control valve is arranged in each of the first air duct, the second air duct, the third air duct and the fourth air duct; a first ventilation circuit is formed by the first air duct, the carbon dioxide capturing box and the fourth air duct connected in sequence, and a first air blower is arranged in the first ventilation circuit to enable the airflow to flow from the first air duct to the fourth air duct; a second ventilation circuit is formed by the third air duct, the carbon dioxide capturing box and the second air duct connected in sequence, and a second air blower is arranged in the second ventilation circuit to enable the airflow to flow from the third air duct to the second air duct.

[0010] Further preferably, the carbon dioxide capturing box is rectangular, the connecting port of the first air duct and the carbon dioxide capturing box and the connecting port of the third air duct and the carbon dioxide capturing box are located at the same end in the long axis direction of the carbon dioxide capturing box, and the connecting port of the second air duct and the carbon dioxide capturing box and the connecting port of the fourth air duct and the carbon dioxide capturing box are located at the same end in the long axis direction of the carbon dioxide capturing box.

[0011] Further preferably, the first side is the upper side of the carbon dioxide capturing box, and the second side is the lower side of the carbon dioxide capturing box.

[0012] Further preferably, the gas transmission system comprises a suction pump, the carbon dioxide releasing port of the capturing box is connected with a gas bag through the suction pump and a gas pipe, the gas inlet of the gas bag is connected with the suction pump through the gas pipe, the gas outlet of the gas bag is connected with a carbon dioxide tank through the suction and beating integrated pump and the gas pipe, and a first stop valve is arranged on the gas pipe between the gas inlet of the carbon dioxide tank and the gas outlet of the gas bag; the carbon dioxide tank is provided with a carbon dioxide gas outlet interface, and a second stop valve is arranged on the carbon dioxide gas outlet interface of the carbon dioxide tank.

[0013] Further preferably, the carbon dioxide capturing device comprises an external box body, and the carbon dioxide capturing box, the suction pump, the gas bag and the suction and beating integrated pump are all arranged in the external box body; the bottom of the external box body is provided with a traveling wheel with a brake device.

[0014] The utility model discloses an advantageous effect is: the top position of shed frame determines the overall height of closed small shed, because the shed frame can be adjusted, therefore the overall height of closed small shed in the utility model can be adjusted according to the growth height of crops, and the lateral plastic film can be expanded along the vertical direction, which ensures that the carbon dioxide fertilization process is always carried out in a closed environment, and more effectively realizes the accurate carbon dioxide fertilization. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic diagram of the utility model.

[0016] Figure 2 It is the plane arrangement structure schematic diagram of the utility model.

[0017] Figure 3 It is the structure schematic diagram of agricultural production closed space in the side direction in the utility model.

[0018] Figure 4 It is the overall structure schematic diagram of carbon dioxide trapping device in the utility model.

[0019] Figure 5 It is the air flow direction schematic diagram of carbon dioxide trapping device in the utility model when the first ventilation circuit is opened and works (the arrow in the drawing is air flow direction).

[0020] Figure 6 It is the air flow direction schematic diagram of carbon dioxide trapping device in the utility model when the second ventilation circuit is opened and works (the arrow in the drawing is air flow direction).

[0021] Figure 7 It is the A-A view in Figure 4 .

[0022] Figure 8 It is the B-B view in Figure 4 .

[0023] Figure 9 It is the C-C view in Figure 4 .

[0024] Parts, positions and numbers in the figure: external box 1, walking wheel 2, carbon dioxide capture box 3, air pump 4, first air duct 5, second air duct 6, third air duct 7, fourth air duct 8, first fan 9, second fan 10, air bag 11, integrated beating pump 12, carbon dioxide tank 13, control panel 14, first stop valve 15, second stop valve 16, drive motor 17, vertical rack 18, carbon dioxide capture device 19, agricultural production closed space 20, closed small shed 21, carbon dioxide release pipe 22, control system 23, top film rolling device 24, side film rolling device 25, shed body frame 26, fixed frame 27. DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the drawings.

[0026] As Figures 1 to 3 shown, the utility model includes a plurality of closed small sheds 21 arranged in the agricultural production closed space 20, the closed small shed 21 is externally provided with a carbon dioxide tank 13, the closed small shed 21 is internally provided with a carbon dioxide release pipe 22, the outlet end of the carbon dioxide tank 13 is communicated with the inlet end of the carbon dioxide release pipe 22 through a gas conveying pipeline, a plurality of carbon dioxide fertilization release openings are arranged on the carbon dioxide release pipe 22, the closed small shed 21 includes a shed body frame 26, the shed body frame 26 is installed on the fixed frame 27 through a lifting mechanism, the side of the shed body frame 26 is installed with a side plastic film and a side film rolling device 25, the side plastic film is expanded and retracted to realize the opening and closing of the side of the closed small shed 21 through the control of the side film rolling device 25, and the moving direction corresponding to the expansion and retraction of the side plastic film is arranged along the vertical direction. The fixed frame 27 can generally adopt a simple support satisfying the bearing capacity of the closed small shed 21. It can be understood that the top position of the shed body frame 26 determines the overall height of the closed small shed 21, since the shed body frame 26 can be adjusted in height, the overall height of the closed small shed 21 in the utility model can be adjusted in height according to the growth height of crops, and simultaneously the side plastic film can be expanded along the vertical direction, ensuring that the carbon dioxide fertilization process is always carried out in a closed environment, and more effectively realizing the accurate carbon dioxide fertilization.

[0027] The lifting mechanism can adopt various conventional schemes in the prior art, and a preferred scheme is that a vertical rack 18 is fixedly arranged on the shed frame 26, and a driving motor 17 is fixedly arranged on the fixed frame 27, and the output shaft of the driving motor 17 is in transmission connection with the vertical rack 18 through a gear. The driving motor 17 drives the gear to rotate, thereby driving the vertical rack 18 to move vertically, and further driving the whole shed frame 26 to lift. It can be understood that, in order to make the structure more reliable, a vertical guide mechanism can be additionally arranged between the shed frame 26 and the fixed frame 27. Of course, in some embodiments, in order to make the structure more reliable, the gear and the vertical rack 18 can also be arranged in multiple groups, for example, two groups of gear and rack transmission mechanisms can be arranged at both ends of the closed small shed 21, and a total of four groups; the two gears at the same end can share a transmission shaft.

[0028] The top of the shed frame 26 can adopt a common fixed roof, and in order to be more beneficial to the production of crops, a preferred scheme is that a top plastic film and a top film winder 24 are arranged on the top of the shed frame 26, and the top plastic film is controlled to expand and retract by the top film winder 24 to realize the opening and closing of the top of the closed small shed 21. During the carbon dioxide fertilization process, the closed small shed 21 is in a closed state. It can be understood that, in order to improve photosynthesis, the side plastic film and the top plastic film preferably adopt various transparent material films in the prior art, otherwise a supplementary light lamp should be considered to be additionally arranged in the closed small shed 21. Of course, a further preferred scheme can be that the transparent material film and the supplementary light lamp are used in combination. After the carbon dioxide fertilization is completed, the side plastic film and the top plastic film are collected by the corresponding film winders, so that the closed small shed 21 is in an open state.

[0029] In order to realize more accurate fertilization, the carbon dioxide delivery pipe corresponding to the carbon dioxide release pipe 22 is provided with an electromagnetic valve and a gas flow controller, and the closed small shed 21 is provided with a carbon dioxide concentration sensor, and the electromagnetic valve, the gas flow controller and the carbon dioxide concentration sensor are electrically connected to the control system 23. By using the detection data of the carbon dioxide concentration sensor, the opening and closing of the carbon dioxide delivery pipe corresponding to the carbon dioxide release pipe 22 and the carbon dioxide flow rate delivered can be controlled in real time, so as to realize more accurate fertilization.

[0030] The carbon dioxide concentration sensor can be arranged one or more, preferably, the closed small shed 21 is arranged along the long axis direction interval multiple carbon dioxide concentration sensor. Correspondingly, the carbon dioxide release pipe 22 along the length direction of the closed small shed 21 extends, the carbon dioxide release pipe 22 on the carbon dioxide fertilizer release port is connected with the carbon dioxide release head through the intermediate connecting pipe, the intermediate connecting pipe is arranged along the length direction of the carbon dioxide release pipe 22, the intermediate connecting pipe is provided with electromagnetic valve and gas flow controller, the closed small shed 21 is arranged along the long axis direction interval multiple carbon dioxide concentration sensor. After using the above scheme, the carbon dioxide fertilization process can be controlled independently in multiple areas, so as to realize more accurate fertilization.

[0031] Preferably, the inlet end of the carbon dioxide tank 13 is connected with the carbon dioxide capture device 19 through the gas transmission system, the carbon dioxide capture device 19 is arranged outside the agricultural production closed space 20, and the specific structure of the carbon dioxide capture device 19 can refer to Figures 4 to 9 The carbon dioxide capture device 19 comprises a carbon dioxide capture box 3, the carbon dioxide capture box 3 is provided with carbon dioxide capture material, the carbon dioxide capture box 3 is provided with a carbon dioxide release element, the carbon dioxide release element is a heating element or a humidifying element or a heating and humidifying element, and the carbon dioxide capture box 3 is provided with a capture box carbon dioxide release port for connecting the inlet end of the gas transmission system. The capture box carbon dioxide release port is provided with a control valve, and the carbon dioxide capture box 3 is provided with a ventilation system for gas exchange with the external atmosphere.

[0032] The working principle of the carbon dioxide capture device 19 is that the ventilation system works, so that the carbon dioxide capture material adsorbs the carbon dioxide in the air, and then the carbon dioxide capture material is heated and / or humidified to release the adsorbed carbon dioxide, and then the carbon dioxide is transported to the carbon dioxide tank 13 for use. The utility model adopts the carbon dioxide capture device 19 to directly capture the carbon dioxide in the air, and transports the carbon dioxide to the carbon dioxide release pipe 22 for fertilization, so that the carbon dioxide gas cylinder does not need to be purchased externally, and the use is more convenient.

[0033] The ventilation system can be implemented by a conventional one-way ventilation circuit, that is, one air duct inlet and one pipeline outlet, as long as the air flow in the air can pass through the carbon dioxide capture material. In order to improve the carbon dioxide capture efficiency, the preferred scheme is to refer to Figures 4 to 9, the ventilation system comprises a first air duct 5, a second air duct 6, a third air duct 7 and a fourth air duct 8, the carbon dioxide capture box 3 has a first side and a second side arranged oppositely (the two sides can be left and right oppositely arranged, or the two sides can be front and back oppositely arranged, or the two sides can be up and down oppositely arranged, and the preferred scheme adopted by the utility model is that the first side is the upper side of the carbon dioxide capture box 3, and the second side is the lower side of the carbon dioxide capture box 3), the first air duct 5 and the second air duct 6 are both communicated with the first side of the carbon dioxide capture box 3, and the third air duct 7 and the fourth air duct 8 are both communicated with the second side of the carbon dioxide capture box 3; the ends of the first air duct 5, the second air duct 6, the third air duct 7 and the fourth air duct 8 away from the carbon dioxide capture box 3 are all communicated with the external atmosphere, and control valves are arranged in the first air duct 5, the second air duct 6, the third air duct 7 and the fourth air duct 8, a first ventilation circuit is formed by the first air duct 5, the carbon dioxide capture box 3 and the fourth air duct 8 connected in sequence, a first fan 9 is arranged in the first ventilation circuit to enable the airflow to flow from the first air duct 5 to the fourth air duct 8, a second ventilation circuit is formed by the third air duct 7, the carbon dioxide capture box 3 and the second air duct 6 connected in sequence, and a second fan 10 is arranged in the second ventilation circuit to enable the airflow to flow from the third air duct 7 to the second air duct 6.

[0034] In implementation, the first ventilation circuit and the second ventilation circuit can be cyclically and alternately operated according to the set time (that is, when the first ventilation circuit is opened and operated, the second ventilation circuit is closed, and when the second ventilation circuit is opened and operated, the first ventilation circuit is closed), to form the forward and reverse alternating airflow, so that the contact between the carbon dioxide capture material and the air is more sufficient, thereby significantly improving the carbon dioxide capture efficiency of the carbon dioxide capture material on the carbon dioxide. The structure of the first fan 9 and the second fan 10 is not specifically required, as long as the air can be guided according to the above airflow path, and the corresponding installation position in the air duct is appropriate.

[0035] To further improve the carbon dioxide capture efficiency of the carbon dioxide capture material on the carbon dioxide, the carbon dioxide capture box 3 is preferably rectangular, the connecting port of the first air duct 5 and the carbon dioxide capture box 3 and the connecting port of the third air duct 7 and the carbon dioxide capture box 3 are located at the same end in the long axis direction of the carbon dioxide capture box 3 (the two connecting ports are both located at the right end in the embodiment shown in Figure 4 ), and the connecting port of the second air duct 6 and the carbon dioxide capture box 3 and the connecting port of the fourth air duct 8 and the carbon dioxide capture box 3 are located at the same end in the long axis direction of the carbon dioxide capture box 3 (the two connecting ports are both located at the left end in the embodiment shown in Figure 4 ). Referring to Figure 5 and Figure 6 , the above structure can enable the airflow to form a longer ventilation path in the horizontal direction in the carbon dioxide capture box 3, so that the contact between the carbon dioxide capture material and the air is more sufficient, thereby further improving the carbon dioxide capture efficiency of the carbon dioxide capture material on the carbon dioxide.

[0036] As an experimental example, the structure shown in the utility model Figure 4 The comparative experiment is carried out under the same working condition, that is, the conditions of the carbon dioxide capture box 3, the carbon dioxide capture material, the heating element, the air flow rate and the like are consistent, and the only difference is that the air duct arrangement and the fan working mode are different; the adsorption time is 80 minutes, the experimental example is that the first ventilation circuit is closed after working for 20 minutes, and the second ventilation circuit works for 20 minutes, and the two work in a cycle of 20 minutes; the comparative example is that the one-way air flow continues to ventilate for 80 minutes; the release time is 60 minutes, and the carbon dioxide concentration of the carbon dioxide release port is tested every 5 minutes, and the test data of the two are shown in the following table, and the measurement unit of the carbon dioxide concentration is ppm.

[0037]

[0038]

[0039] As can be seen from the test data shown in the above table, the first ventilation circuit and the second ventilation circuit work alternately, which can continuously release carbon dioxide with higher concentration, thereby proving that the scheme can significantly improve the carbon dioxide capture efficiency of the carbon dioxide capture material.

[0040] In order to facilitate control and use, the control valves provided in the carbon dioxide release port of the capture box, the first air duct 5, the second air duct 6, the third air duct 7 and the fourth air duct 8 are preferably electric valves.

[0041] The preferred scheme of the gas transmission system is that: the gas suction pump 4 is arranged, the carbon dioxide release port of the carbon dioxide capture box is connected with the gas bag 11 through the gas suction pump 4 and the gas pipe, the gas inlet of the gas bag 11 is connected with the gas suction pump 4 through the gas pipe, the gas outlet of the gas bag 11 is connected with the carbon dioxide tank 13 through the gas suction and beating integrated pump 12 and the gas pipe, the first stop valve 15 is arranged on the gas pipe between the gas inlet of the carbon dioxide tank 13 and the gas outlet of the gas bag 11; the carbon dioxide tank 13 is provided with a carbon dioxide gas outlet interface, and the second stop valve 16 is arranged on the carbon dioxide gas outlet interface. In the process of enriching and capturing carbon dioxide gas, the first stop valve 15 and the second stop valve 16 are initially closed, the carbon dioxide released by the carbon dioxide capture box 3 can first enter the gas bag 11 for storage through the gas suction pump 4, when the carbon dioxide gas in the gas bag 11 accumulates to a certain amount, the first stop valve 15 is opened, and the carbon dioxide gas is transported to the carbon dioxide tank 13 through the gas suction and beating integrated pump 12 for standby, and then the first stop valve 15 is closed again, in the further preferred embodiment, when the carbon dioxide gas is transported to the carbon dioxide tank 13 through the gas bag 11, the automatic control can also be realized through the arrangement of the carbon dioxide concentration sensor or the time relay. The carbon dioxide tank 13 in the utility model can store a large amount of enriched carbon dioxide gas, and is independently used, when the carbon dioxide tank 13 needs to supply gas to the outside, the second stop valve 16 can be opened, at this time, the first stop valve 15 is in the closed state, the corresponding carbon dioxide enrichment device (fan, carbon dioxide release element and the like) of the carbon dioxide capture box 3 can work all the time, and the enriched high-concentration carbon dioxide is stored in the gas bag 11. In order to facilitate control and use, the first stop valve 15 and the second stop valve 16 are preferably electric valves.

[0042] In order to facilitate use, the carbon dioxide capture device 19 further comprises an external box body 1, the carbon dioxide capture box 3, the gas suction pump 4, the gas bag 11 and the gas suction and beating integrated pump 12 are arranged in the external box body 1. The external box body 1 can serve as the support main body of all parts, facilitating the movement and transportation of the whole device, and also protecting other parts. If the side wall of the external box body 1 is provided with an opening structure, a rainproof ventilation shutter can be additionally arranged on the opening, which can protect the internal facilities in the open environment of wind, sunlight, rain and hail. The parts in the internal box body 1 can be reasonably arranged according to the actual situation, in the preferred scheme, the gas bag 11 can be directly placed on the metal support plate on the upper part of the internal cavity of the box body (not fixed), and the carbon dioxide capture box 3 is generally fixedly arranged at the middle position. In specific implementation, the carbon dioxide capture device 19 can be provided with one or more. When there is only one, the carbon dioxide tank 13 can also be arranged in the external box body 1. If there are multiple, multiple carbon dioxide capture devices 19 can share one carbon dioxide tank 13. Of course, in some embodiments, the carbon dioxide tank 13 can also be independently arranged respectively and connected with the carbon dioxide release pipe 22 correspondingly.

[0043] For further facilitating the movement of the carbon dioxide capturing device 19 as a whole, the external box 1 is provided with walking wheels 2 at the bottom thereof, which are provided with brake devices.

Claims

1. A closed-space carbon dioxide fertilization device for agricultural production, comprising several closed sheds (21) located within a closed agricultural production space (20), a carbon dioxide tank (13) installed outside each closed shed (21), a carbon dioxide release pipe (22) installed inside each closed shed (21), the outlet of the carbon dioxide tank (13) being connected to the inlet of the carbon dioxide release pipe (22) via a gas transmission pipeline, and several carbon dioxide fertilization release ports provided on the carbon dioxide release pipe (22), characterized in that: The enclosed shed (21) includes a shed frame (26), which is installed on a fixed frame (27) via a lifting mechanism. Side plastic film and side film roller (25) are installed on the side of the shed frame (26). The side plastic film is opened and closed by controlling the unfolding and retraction of the side plastic film through the side film roller (25). The movement direction corresponding to the unfolding and retraction of the side plastic film is set vertically.

2. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 1, characterized in that: The lifting mechanism includes a vertical rack (18) fixedly mounted on the shed frame (26) and a drive motor (17) fixedly mounted on the fixed frame (27). The output shaft of the drive motor (17) is connected to the vertical rack (18) through a gear. A top plastic film and a top film roller (24) are installed on the top of the shed frame (26). The top plastic film is unfolded and retracted by the top film roller (24) to open and close the top of the sealed shed (21).

3. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 1, characterized in that: The carbon dioxide delivery pipeline corresponding to the carbon dioxide release pipe (22) is equipped with a solenoid valve and a gas flow controller. A carbon dioxide concentration sensor is installed in the sealed shed (21). The solenoid valve, gas flow controller and carbon dioxide concentration sensor are all electrically connected to the control system (23).

4. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 3, characterized in that: The carbon dioxide release pipe (22) extends along the length of the sealed shed (21). The carbon dioxide fertilizer release port on the carbon dioxide release pipe (22) is connected to the carbon dioxide release head through the intermediate connecting pipe. The intermediate connecting pipe is arranged at intervals along the length of the carbon dioxide release pipe (22). Each intermediate connecting pipe is equipped with a solenoid valve and a gas flow controller. The sealed shed (21) is equipped with multiple carbon dioxide concentration sensors at intervals along its long axis.

5. The closed-space carbon dioxide fertilization device for agricultural production as described in any one of claims 1 to 4, characterized in that: The inlet of the carbon dioxide tank (13) is connected to a carbon dioxide capture device (19) via a gas transmission system. The carbon dioxide capture device (19) is located outside the closed space (20) of agricultural production. The carbon dioxide capture device (19) includes a carbon dioxide capture box (3). The carbon dioxide capture box (3) contains carbon dioxide capture material. The carbon dioxide capture box (3) is equipped with a carbon dioxide release element, which is a heating element, a humidifying element, or a heating and humidifying element. The carbon dioxide capture box (3) is provided with a capture box carbon dioxide release port for connecting to the inlet of the gas transmission system. The capture box carbon dioxide release port is equipped with a control valve. The carbon dioxide capture box (3) is equipped with a ventilation system for exchanging gases with the external atmosphere.

6. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 5, characterized in that: The ventilation system includes a first air duct (5), a second air duct (6), a third air duct (7), and a fourth air duct (8). The carbon dioxide capture box (3) has a first side and a second side arranged opposite to each other. The first air duct (5) and the second air duct (6) are both connected to the first side of the carbon dioxide capture box (3), and the third air duct (7) and the fourth air duct (8) are both connected to the second side of the carbon dioxide capture box (3). The ends of the first air duct (5), the second air duct (6), the third air duct (7), and the fourth air duct (8) away from the carbon dioxide capture box (3) are all connected to the external atmosphere. The first air duct (5) Control valves are installed in the second air duct (6), the third air duct (7) and the fourth air duct (8). The first ventilation circuit is formed by the first air duct (5), the carbon dioxide capture box (3) and the fourth air duct (8) connected in sequence. A first fan (9) is installed in the first ventilation circuit so that the airflow can flow from the first air duct (5) to the fourth air duct (8). The second ventilation circuit is formed by the third air duct (7), the carbon dioxide capture box (3) and the second air duct (6) connected in sequence. A second fan (10) is installed in the second ventilation circuit so that the airflow can flow from the third air duct (7) to the second air duct (6).

7. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 6, characterized in that: The carbon dioxide capture box (3) is rectangular. The connection ports of the first air duct (5) and the carbon dioxide capture box (3) and the third air duct (7) and the carbon dioxide capture box (3) are located at the same end of the long axis of the carbon dioxide capture box (3). The connection ports of the second air duct (6) and the carbon dioxide capture box (3) and the fourth air duct (8) and the carbon dioxide capture box (3) are located at the same end of the long axis of the carbon dioxide capture box (3).

8. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 7, characterized in that: The first side is the upper side of the carbon dioxide capture box (3), and the second side is the lower side of the carbon dioxide capture box (3).

9. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 5, characterized in that: The gas transmission system includes a vacuum pump (4), and the carbon dioxide release port of the capture box is connected to a gas bag (11) through the vacuum pump (4) and a gas pipe. The air inlet of the gas bag (11) is connected to the vacuum pump (4) through a gas pipe. The air outlet of the gas bag (11) is connected to the carbon dioxide tank (13) through the vacuum pump (12) and a gas pipe. A first shut-off valve (15) is provided on the gas pipe between the air inlet of the carbon dioxide tank (13) and the air outlet of the gas bag (11). The carbon dioxide tank (13) is provided with a carbon dioxide outlet, and a second shut-off valve (16) is provided on its carbon dioxide outlet.

10. The closed-space carbon dioxide fertilization device for agricultural production as described in claim 9, characterized in that: The carbon dioxide capture device (19) includes an outer housing (1), a carbon dioxide capture box (3), a vacuum pump (4), an air bag (11), and a combined pump (12) all located inside the outer housing (1); the bottom of the outer housing (1) is equipped with wheels (2) with brakes.

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