Device for collecting greenhouse gas in greenhouse

Abstract

The utility model discloses a device for collecting greenhouse gas in a greenhouse, and solves the technical problem that the greenhouse gas in the greenhouse is difficult to collect due to high temperature when the existing gas concentration detection method is difficult to be applied to the greenhouse closing period. The device comprises a supporting pipe, a silica gel hose, an air exhaust pipeline, an air exhaust device and an air storage bag, a plurality of small holes are sequentially formed in the supporting pipe, the silica gel hose is arranged in the supporting pipe, one end of the silica gel hose extends out of the small holes of the supporting pipe to be communicated with the interior of the greenhouse, the other end of the silica gel hose is communicated with the air exhaust pipeline, the air exhaust pipeline is communicated with the air exhaust device arranged outside the greenhouse, and an air outlet of the air exhaust device is connected with the air storage bag. The air exhaust device provides power, and air in the greenhouse is exhausted out of the greenhouse through the silica gel hose and the air exhaust pipeline. The greenhouse gas collecting device is low in manufacturing cost, simple in structure and convenient to disassemble and assemble, the storage battery is arranged on the greenhouse gas collecting device so that the greenhouse gas in the greenhouse can be conveniently used outdoors, and the function of automatically collecting greenhouse gas in the greenhouse during the high-temperature greenhouse closing period in summer is achieved.

Description

Technical Field

[0001] This utility model relates to the field of gas collection technology, specifically to a device for collecting greenhouse gases inside a greenhouse. Background Technology

[0002] The entire growth cycle of greenhouse vegetables typically lasts from early September to late June of the following year. From July to August, farmers subject the greenhouses to a high-temperature, closed-loop treatment (commonly known as "enclosure sealing"). Before enclosure sealing begins, farmers apply organic fertilizer, till the soil, water, and cover the greenhouse with plastic film, aiming to utilize the high temperatures inside to sterilize the plants. During the entire enclosure sealing process, the applied organic fertilizer continues to ferment in the soil, accompanied by the production and emission of significant amounts of greenhouse gases. Therefore, investigating the emission flux and patterns of greenhouse gases within greenhouses during the enclosure sealing period is crucial for implementing measures to reduce these emissions.

[0003] During the fumigation period, no crops are planted inside the greenhouse. Therefore, based on the principle of the traditional static box method, the overflow emission flux of the greenhouse during ventilation can be estimated by the rate of change of greenhouse gas concentration inside the greenhouse under sealed conditions. This usually only requires collecting gas samples inside the greenhouse along the time gradient after fumigation and measuring the change in concentration. However, during the summer fumigation period, the temperature inside the greenhouse is high, reaching up to 80°C, making it difficult to perform manual sampling inside the greenhouse for the following reasons: (1) High temperature environment is very harmful to the human body, and the human body faces life-threatening danger if it enters the greenhouse directly; (2) The temperature inside the greenhouse is too high during the day, which can easily reduce the service life of the greenhouse plastic film. Farmers usually leave appropriate gaps in the ventilation openings for heat dissipation. At this time, the greenhouse is not completely sealed and is not a static box, so the traditional method does not have the conditions for detection; (3) Strong irritating gases (such as ammonia and hydrogen sulfide) produced by the fermentation of organic fertilizer during fumigation are harmful to the human body. Even sampling outside the greenhouse during the day is highly risky; (4) Conventional gas continuous detection instruments require electricity and are expensive. They cannot operate continuously when placed inside the greenhouse at high temperatures. Therefore, there is an urgent need for a device that can automatically collect greenhouse gases inside greenhouses during the high-temperature, heat-affected summer period. This device should be low-cost, portable, have its own battery for outdoor use, and be able to collect gas samples at different time intervals, so that relevant personnel can collect samples and bring them back to the laboratory for testing and analysis.

[0004] In summary, considering the above four points, conducting the relevant operations outside the greenhouse is a more reasonable choice. However, since outdoor temperatures are also high during the day in summer, and greenhouse vents are usually open, the optimal time for sampling is at night; that is, after the internal temperature of the greenhouse has dropped to a suitable level, the vents should be closed to create a sealed space, and sampling can then begin. Alternatively, placing automatic monitoring equipment outside the greenhouse and using probes inserted into the greenhouse for real-time monitoring is theoretically an option, but such equipment is usually expensive, not heat-resistant, difficult to manage outdoors, and prone to causing property damage.

[0005] The sampling process for investigating greenhouse gas emissions in greenhouses typically takes several hours, and manual sampling is time-consuming and labor-intensive, especially when multiple greenhouses need to be sampled simultaneously at night. Therefore, there is an urgent need for an automatic greenhouse air sampling device suitable for outdoor operations during the summer fumigation period. This device should be low-cost, simple in structure, and easy to assemble and disassemble. Once the sampling conditions in the greenhouse are met, it should be able to automatically sample and store air at multiple time gradients, thereby solving the aforementioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a device for collecting greenhouse gases inside greenhouses, in order to solve the technical problem that existing gas concentration detection methods are difficult to apply to greenhouses during the sealing period due to high temperatures, making it difficult to collect greenhouse gases inside the greenhouse.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This utility model provides a device for collecting greenhouse gases inside a greenhouse, comprising a support pipe, a silicone hose, an extraction pipe, an extraction device, and a gas storage bag. The support pipe has multiple small holes arranged sequentially. The silicone hose is placed inside the support pipe, with one end extending from one of the holes and communicating with the interior of the greenhouse, and the other end communicating with the extraction pipe. The extraction pipe is connected to the extraction device located outside the greenhouse. The outlet of the extraction device is connected to the gas storage bag. The extraction device provides power to extract the gas from inside the greenhouse through the silicone hose and the extraction pipe, and store it in the gas storage bag.

[0009] Furthermore, the extraction device includes an air inlet, an air delivery pipe, and an air outlet. The extraction pipe is connected to the air inlet of the extraction device, and the air inlet is connected to the air delivery pipe. A vacuum pump is connected to the air delivery pipe to extract the gas from the greenhouse. The air delivery pipe has multiple branches, and the outlet of each branch is connected to the air outlet. The air outlet is connected to a gas storage bag to deliver the extracted gas into the gas storage bag.

[0010] Furthermore, each branch of the gas transmission pipeline is equipped with a time relay and a solenoid valve. The time relay controls the opening and closing of the solenoid valve and the start and stop of the vacuum pump through an electrical signal. The solenoid valve is connected to the gas transmission pipeline and distributes the gas to different gas storage bags through the gas outlet.

[0011] Furthermore, it also includes a storage battery, which is electrically connected to the vacuum device, the time relay, and the solenoid valve to provide power to the vacuum device, the time relay, and the solenoid valve.

[0012] Based on the above technical solution, the embodiments of this utility model can produce at least the following technical effects:

[0013] (1) The device for collecting greenhouse gases in greenhouses provided by this utility model realizes the function of automatically collecting greenhouse gases in greenhouses during the high-temperature fumigation period in summer by setting up a support pipe, silicone hose, gas extraction pipe, gas extraction device and gas storage bag. The device has a low cost, simple structure and is easy to disassemble and assemble, and has a built-in battery for easy outdoor use. It solves the technical problem that existing gas concentration detection methods are difficult to apply to greenhouses during the fumigation period due to high temperature.

[0014] (2) The gas extraction device in this utility model includes an air inlet, a gas delivery pipe, an air outlet, and a vacuum pump. The vacuum pump generates negative pressure to draw out the gas from the greenhouse and delivers it to the gas storage bag through the gas delivery pipe. Simultaneously, each branch of the gas delivery pipe is equipped with a time relay and a solenoid valve. The time relay can be preset with multiple sampling time points, and the opening and closing of the solenoid valve and the start and stop of the vacuum pump are controlled by electrical signals, thereby achieving automatic sampling and storage at different time gradients. This design allows the sampling process to proceed automatically without human intervention, greatly improving sampling efficiency and accuracy.

[0015] (3) This utility model also provides power to electronic components such as the extraction device, time relay, and solenoid valve by setting up a storage battery, enabling the sampling device to operate without an external power source, further increasing the portability and flexibility of the device. This is especially important in agricultural scenarios where greenhouses are widely distributed and power access is inconvenient, as it allows relevant personnel to bring the collected samples back to the laboratory for testing and analysis to explore the patterns and fluxes of greenhouse gas emissions, providing a scientific basis for taking measures to reduce emissions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the air extraction device of this utility model;

[0019] In the above figures, the component names corresponding to the reference numerals are as follows:

[0020] 1. Support tube; 2. Silicone hose; 3. Air extraction pipe; 4. Air extraction device; 5. Battery; 6. Vacuum pump; 7. Time relay; 8. Solenoid valve; 9. Air inlet; 10. Air delivery pipe; 11. Air outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] Example 1

[0024] Please see Figure 1A device for collecting greenhouse gases inside a greenhouse includes a support pipe 1, a silicone hose 2, an extraction pipe 3, an extraction device 4, and a gas storage bag. The support pipe 1 has multiple small holes arranged sequentially. The silicone hose 2 is placed inside the support pipe 1, which supports the hose 2 to ensure the structural stability of the entire sampling device. One end of the silicone hose 2 extends through a small hole in the support pipe 1 and communicates with the interior environment of the greenhouse; the other end is connected to the extraction pipe 3. The extraction pipe 3 is connected to the extraction device 4 located outside the greenhouse. The outlet of the extraction device 4 is connected to the gas storage bag. The extraction device 4 provides power to extract the gas from the greenhouse through the silicone hose 2 and the extraction pipe 3, storing it in the gas storage bag. The silicone hose 2 has good flexibility and high-temperature resistance, making it suitable for use in high-temperature environments.

[0025] Example 2

[0026] The technical features in this embodiment are basically the same as those in Embodiment 1. The same technical features and solutions will not be repeated here. Only the differences between Embodiment 2 and Embodiment 1 will be described here.

[0027] Please see Figure 2 The air extraction device 4 includes an air inlet 9, an air delivery pipe 10, and an air outlet 11. The air extraction pipe 3 is connected to the air inlet 9 of the air extraction device 4, and the air inlet 9 is connected to the air delivery pipe 10. A vacuum pump 6 is connected to the air delivery pipe 10. The vacuum pump 6 draws out the gas in the greenhouse by generating negative pressure. The air delivery pipe 10 is provided with multiple branches, and the outlet end of each branch is connected to the air outlet 11. The air outlet 11 is connected to a gas storage bag, and the extracted gas is transported to the gas storage bag.

[0028] Example 3

[0029] Each branch of the gas pipeline 10 is equipped with a time relay 7 and a solenoid valve 8. The time relay 7 is a DS-24C time relay, and the solenoid valve 8 is a 2W direct-acting solenoid valve. The time relay 7 controls the opening and closing of the solenoid valve 8, as well as the start and stop of the vacuum pump 6, via electrical signals. Multiple sampling time points are preset on the time relay, enabling the sampling process to proceed automatically without human intervention, controlling the pumping device to automatically sample according to the set time gradient. The solenoid valve 8 is connected to the gas pipeline 10, controlling the flow and storage of gas. Based on the instructions of the time relay, the solenoid valve opens or closes at the set time points, realizing the dispensing and storage of samples at different time gradients. The gas is distributed into different gas storage bags through the gas outlet 11.

[0030] Example 4

[0031] In order to enable the sampling device to operate without an external power source and increase the portability and flexibility of the device, a storage battery 5 is also installed. The storage battery 5 is electrically connected to the vacuum device 4, the time relay 7 and the solenoid valve 8, providing power to the vacuum device 4, the time relay 7 and the solenoid valve 8.

[0032] During the greenhouse fumigation period, farmers typically leave gaps in the ventilation openings for ventilation and heat dissipation due to the excessively high daytime temperatures inside the greenhouse, avoiding damage to the greenhouse film. Once the temperature is suitable at night, the greenhouse can be sealed for gas sampling. This device can be pre-installed on the outside of the greenhouse, with silicone tubing for extraction inserted into different points inside. It is manually activated after the greenhouse is sealed (after the temperature drops in the evening). By setting time relay parameters, it automatically collects samples at different time gradients. Simultaneously, it uses solenoid valves to separate and store different samples. Once activated, the device operates autonomously, allowing for nighttime sampling during the fumigation period, saving time and effort.

[0033] This invention relates to an automatic greenhouse air sampling device during the summer fumigation period. It takes full advantage of the lower nighttime temperatures when the greenhouse is sealed, using a time relay and solenoid valve to automatically collect gas samples at different time gradients. After the greenhouse vents are closed in the evening, the automatic sampling device is manually activated to begin sample collection. During the period between vent closure and reopening, to facilitate subsequent research on changes in gas concentration inside the greenhouse, the device will sample at different time gradients according to pre-set parameters on the time relay. The solenoid valve switches will then distribute samples from the same greenhouse at different time gradients into different gas bags. After each sampling cycle, the gas bags must be manually replaced (the new gas bags must be cleaned with nitrogen and evacuated; the device also has the function of evacuating the replaced gas bags).

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for collecting greenhouse gases inside a greenhouse, characterized in that, The system includes a support pipe (1), a silicone hose (2), an extraction pipe (3), an extraction device (4), and a gas storage bag. The support pipe (1) has multiple small holes arranged in sequence. The silicone hose (2) is placed inside the support pipe (1), with one end extending out of the small hole of the support pipe (1) and communicating with the internal environment of the greenhouse. The other end is connected to the extraction pipe (3). The extraction pipe (3) is connected to the extraction device (4) located outside the greenhouse. The outlet of the extraction device (4) is connected to the gas storage bag. The extraction device (4) provides power to extract the gas inside the greenhouse through the silicone hose (2) and the extraction pipe (3) and store it in the gas storage bag.

2. The device for collecting greenhouse gases inside a greenhouse according to claim 1, characterized in that, The air extraction device (4) includes an air inlet (9), an air delivery pipe (10), and an air outlet (11). The air extraction pipe (3) is connected to the air inlet (9) of the air extraction device (4), and the air inlet (9) is connected to the air delivery pipe (10). A vacuum pump (6) is connected to the air delivery pipe (10) to extract the gas from the greenhouse. The air delivery pipe (10) has multiple branches, and the outlet end of each branch is connected to the air outlet (11). The air outlet (11) is connected to a gas storage bag to deliver the extracted gas to the gas storage bag.

3. The device for collecting greenhouse gases inside a greenhouse according to claim 2, characterized in that, Each branch of the gas pipeline (10) is equipped with a time relay (7) and a solenoid valve (8). The time relay (7) is a DS-24C time relay, and the solenoid valve (8) is a 2W direct-acting solenoid valve. The time relay (7) controls the opening and closing of the solenoid valve (8) and the start and stop of the vacuum pump (6) through an electrical signal. The solenoid valve (8) is connected to the gas pipeline (10) and distributes the gas to different gas storage bags through the gas outlet (11).

4. The device for collecting greenhouse gases inside a greenhouse according to claim 3, characterized in that, It also includes a storage battery (5), which is electrically connected to the air extraction device (4), the time relay (7) and the solenoid valve (8) to provide power to the air extraction device (4), the time relay (7) and the solenoid valve (8).

Images