Gas mixing and conveying device for improving photosynthetic rate of greenhouse plants

Abstract

The invention provides a gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants. The gas mixing and conveying device comprises a carbon dioxide gas source or an oxygen gas source, a foaming part, a conveying part, a detecting part and an adjusting part. According to the gas mixing and conveying device for improving the photosynthetic rate of the greenhouse plants, a carbon dioxide gas source or an oxygen gas source provides a source, the foaming component provides carbon dioxide bubbles, the conveying component conveys the carbon dioxide bubbles, and the detection component detects the concentration of carbon dioxide around the plants; according to the concentration, the size of bubbles generated by the bubbling component and the bubble conveying speed of the conveying component are adjusted through the adjusting component, so that continuous and stable high-concentration carbon dioxide bubbles are provided to improve the photosynthetic rate of plants, and the yield of the plants is increased.

Description

Technical Field

[0001] This field relates to the technical field of plant cultivation, and particularly to a gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants. Background Art

[0002] The greenhouse planting area is huge and has good economic benefits. However, with the increasing planting area, the competition is getting stronger and the economic benefits are getting thinner. To obtain better economic benefits, increasing the yield of greenhouse plants is a practical way. It is feasible to increase the plant yield by increasing the photosynthetic rate. Usually, the method of increasing the photosynthetic rate is achieved by supplementary lighting and enhancing the intensity of existing supplementary lights. However, due to the high cost of supplementary lights and large power consumption for electricity, the improved economic benefits are average. It is generally used for off-season vegetables, and the benefits of supplementary lights in other fields are very poor and uneconomical.

[0003] Studies have shown that appropriately increasing the concentration of carbon dioxide can increase the photosynthetic rate. However, if it is too high, it will instead reduce the photosynthetic rate and increase the plant yield. Currently, the method of increasing the photosynthetic rate and plant yield by supplementing carbon dioxide gas has the characteristics of uneven gas supplementation, low automation level, and poor supplementation effect. As a result, the concentration is too high in some places and too low in some places, and the supplementation effect is not good. Usually, the combustion method is used to achieve it, which requires fuel, is not easy to control the mixing, and cannot achieve a consistent and stable gas supply source because combustion is difficult to control, and the current supplementation cost is also relatively high. In addition, there is another method of releasing carbon dioxide through a carbon dioxide gas pipe. However, due to the lack of a corresponding uniform gas mixing device, it is difficult to release carbon dioxide evenly and constantly. How to supplement carbon dioxide at low cost and evenly has become an urgent problem to be solved.

[0004] In addition, currently, increasing the carbon dioxide concentration to increase the photosynthetic rate of plants and increasing the photosynthetic rate of plants through light are difficult to combine together, and there are few linkage regulations. There are few ways to increase the photosynthetic rate by two environmental factors, light and carbon dioxide concentration. There are few ways to increase the photosynthetic rate by two environmental factors, temperature and carbon dioxide concentration. There are few ways to increase the photosynthetic rate by three environmental factors, temperature, light, and carbon dioxide concentration.

[0005] In addition, currently, the devices for supplementing carbon dioxide do not consider the influence of temperature, so the method is relatively single and does not consider comprehensively.

[0006] And currently, during the hydroponic cultivation of many plants, due to the long-term circulation of the nutrient solution, the water quality is likely to decline. If the water quality is not treated well, root rot is likely to occur. How to avoid root rot economically and conveniently is also an urgent problem to be solved.

[0007] In many plant factories, pipes are prone to algae growth after long-term use. Algae affect the liquid flow rate, the concentration of nutrient solution, and the gas concentration in the nutrient solution. How to avoid the negative impacts brought by algae has become an urgent problem to be solved.

[0008] In view of this, there is an urgent need to design a gas supply device for new plants to overcome at least some of the above-mentioned defects of existing gas supply devices for plants, and to achieve a new gas supply device that can uniformly, continuously, and highly stably supply carbon dioxide gas or oxygen, accurately control the concentration, serve multiple purposes with one device, and have a low cost. Moreover, it can also play a role in supplementing heat or cooling. Summary of the Invention

[0009] To solve the above technical problems, a gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants includes a carbon dioxide gas source or an oxygen gas source, a carbon dioxide foaming component, a carbon dioxide conveying component, a carbon dioxide concentration detection component, a carbon dioxide concentration adjustment component, a PPFD detection component, and a temperature detection component. When in use, carbon dioxide and oxygen cannot be transported simultaneously, but are transported separately. When transporting carbon dioxide, the liquid is recycled in the pipeline, and a water storage device can be added.

[0010] Furthermore, the carbon dioxide gas source or the oxygen gas source, where the carbon dioxide gas source is a combustion source or a dry ice source, and the oxygen gas source is an oxygen source.

[0011] Furthermore, the carbon dioxide foaming component is a micro or nano or micro-nano foaming device.

[0012] Furthermore, the carbon dioxide conveying component is a pipeline or a ditch that can convey water and the water inside, and the upper end of the pipeline is open.

[0013] Furthermore, the carbon dioxide concentration detection component is a semiconductor detection device.

[0014] Furthermore, the carbon dioxide concentration adjustment component is the carbon dioxide foaming component, or the carbon dioxide concentration adjustment component is a liquid speed adjustment component installed in the carbon dioxide conveying component; the liquid speed adjustment component is a pump or a blade, and by adjusting the flow rate or the rolling speed of the liquid, the delivery amount of carbon dioxide can be adjusted, and the corresponding carbon dioxide concentration can be adjusted accordingly; or by controlling the concentration of carbon dioxide bubbles generated by the bubble component, the concentration of carbon dioxide supplied to the plants can be controlled; or by controlling the size of the carbon dioxide bubbles generated by the bubble component and controlling the rising speed of the bubbles to control the speed of carbon dioxide supplementation, thereby controlling the concentration of carbon dioxide supplied to the plants.

[0015] Furthermore, the water surface opening areas of the pipes at different positions are different. By controlling the water surface opening area of the pipes, the number of carbon dioxide bubbles generated is controlled, thereby controlling the carbon dioxide concentration supplemented to the plants.

[0016] Furthermore, the carbon dioxide transmission component further includes a heating component, a refrigerating component and a temperature detecting component. The heating component and the refrigerating component can heat or refrigerate the water in the carbon dioxide transmission component, and the temperature detecting component detects the temperature of the air around the plants.

[0017] Furthermore, the PPFD detecting component can detect the PPFD on the surface of the plants.

[0018] Beneficial effects: The gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants conveys oxygen or carbon dioxide through a liquid, specifically water. When conveying oxygen, water is poured into the roots of the plants to promote the respiration of the plants and the growth of the plants. When conveying carbon dioxide, the water does not enter the plant planting area but circulates closed in the pipes, and the carbon dioxide enters the leaf space of the plants through buoyancy, increasing the carbon dioxide concentration and improving the photosynthetic rate of the plants. Description of the Drawings

[0019] Figure 1 . A schematic diagram of a gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants;

[0020] Among them, carbon dioxide gas source or oxygen gas source 1, carbon dioxide foaming component 2, carbon dioxide transmission component 3, carbon dioxide concentration detecting component 4, carbon dioxide concentration adjusting component 5. Detailed Embodiments

[0021] The present invention will be specifically introduced below in conjunction with the drawings and specific embodiments.

[0022] Embodiment 1

[0023] As Figure 1 shown, a gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants provided by the present invention includes a carbon dioxide gas source or oxygen gas source 1, a carbon dioxide foaming component 2, a carbon dioxide transmission component 3, a carbon dioxide concentration detecting component 4, a carbon dioxide concentration adjusting component 5, micro-nano oxygen bubbles 6, plants 7, a heating component and a refrigerating component 8, a temperature detecting component 9, and a PPFD detecting component 10.

[0024] Furthermore, the carbon dioxide gas source or oxygen gas source, wherein the carbon dioxide gas source is a combustion source or a dry ice source, and the oxygen gas source is an oxygen source. Dry ice is solid carbon dioxide. The combustion source can obtain carbon dioxide by burning gas, natural gas, firewood, etc.

[0025] Furthermore, the carbon dioxide foaming component is a micro, nano, or micro-nano foaming device. The principle of this foaming device is to obtain carbon dioxide bubbles in a liquid. Due to the small diameter of the bubbles, such as micro or nano bubbles, the rising speed in the liquid is significantly reduced, enabling them to remain in the water for a relatively long time and be evenly distributed in the liquid.

[0026] Furthermore, the carbon dioxide delivery component is a pipe or ditch capable of delivering water and the water inside. The upper end of the pipe is open, so that where the water flows, the bubbles will disperse. By placing the pipe or ditch under the plant, the carbon dioxide bubbles in the water will disperse, supplementing carbon dioxide to the plant. Since they are micro-nano bubbles, the rising speed of the bubbles is relatively slow, and it may take several hours to rise to the water surface. Thus, through transportation, they can be transported over a long distance. And because the rising speed of micro-nano bubbles is very slow, during this process, they will flow a long distance in the water pipe. Also, due to the small size of the bubbles, under the action of water molecules in the water, they will be very evenly mixed in the water, and then high-uniform gas supplementation can be achieved, including oxygen or carbon dioxide gas. In addition, the pipe here can be a water pipe, so low cost can be achieved.

[0027] Furthermore, the carbon dioxide concentration detection component is a semiconductor detection device. There are a large number of such devices or apparatuses on Taobao and JD.com, and these devices can detect the carbon dioxide concentration. By detecting the gas concentration, the speed of supplementing carbon dioxide can be fed back and guided, achieving high-precision supplementation of carbon dioxide gas.

[0028] Furthermore, the carbon dioxide concentration adjustment component is the carbon dioxide foaming component, or the carbon dioxide concentration adjustment component is a liquid speed adjustment component installed on the carbon dioxide delivery component; the liquid speed adjustment component can be a pump or a blade. By adjusting the flow rate or tumbling speed of the liquid, the delivery amount of carbon dioxide can be adjusted, and the corresponding carbon dioxide concentration can be adjusted; or by controlling the concentration of carbon dioxide bubbles generated by the bubble component, the concentration of carbon dioxide supplemented to the plant can also be controlled; or by controlling the size of the carbon dioxide bubbles generated by the bubble component and controlling the rising speed of the bubbles to control the speed of supplementing carbon dioxide, thereby controlling the concentration of carbon dioxide supplemented to the plant. Here, various methods of controlling the carbon dioxide or oxygen concentration are described, and they can be used in combination to achieve more precise supplementation of the carbon dioxide gas concentration.

[0029] Furthermore, the water surface opening areas of the pipes at different positions are different. By controlling the water surface opening area of the pipes, the number of carbon dioxide bubbles generated can be controlled, thereby controlling the carbon dioxide concentration supplemented to the plants. Here, a method for controlling the carbon dioxide or oxygen concentration is described, which can be used in combination with the above-mentioned various methods to achieve a more accurate supplement of the carbon dioxide gas concentration.

[0030] In addition, since air is added during the generation of bubbles, for the micro-nano oxygen bubbles 6, it has the function of sterilization and disinfection. For microorganisms, it can kill small microorganisms to avoid root rot and algae growth in the pipes. The principle is that the high oxidation performance can damage the cells of microorganisms and make them die. However, oxygen is also a gas that the plant roots like. The plant roots achieve respiration through oxygen, which can supplement oxygen to the plants, realizing multiple functions such as killing microorganisms, sterilization, and supplementing oxygen to the plants.

[0031] In this patent, carbon dioxide is filled into water, and the speed and uniformity of carbon dioxide released into the air are controlled by controlling the size of the bubbles in the water and the water flow rate. Compared with directly burning to supplement carbon dioxide, there will be a better and more uniform supplement method, and the cost is also acceptable. Since the conveying device uses pipes and water, its cost is relatively low, with good economic benefits.

[0032] At the same time, the pipes of this system can be used to water plants. At the same time of watering, micro-nano oxygen bubbles can be added to sterilize and disinfect the roots of the plants. Therefore, this device can serve multiple purposes. It should be noted here that when sending the water of the conveying component to the roots of the plants, no carbon dioxide gas needs to be added, only oxygen needs to be added. And here the pipes can serve multiple purposes and can be used for watering the land and conveying carbon dioxide gas.

[0033] Furthermore, the carbon dioxide transfer component further includes a heating component, a refrigeration component 8, and a temperature detection component 9. The heating component and the refrigeration component can heat and cool the water in the carbon dioxide transfer component, and the temperature detection component 9 detects the temperature of the air around the plants. Since the temperature in the greenhouse is sometimes too low and heating is required, when the temperature detection component 9 detects that the temperature is too low, it sends an instruction to the heating component and the refrigeration component 8. Then, the heating component and the refrigeration component here heat or cool the water, and then let the water carry the heat or cold air into the greenhouse to heat or cool the greenhouse. It can serve multiple purposes. By adjusting the temperature, the photosynthetic rate of the plants can be increased. This device can optimize the temperature and carbon dioxide concentration to achieve a doubling plan, obtain a higher photosynthetic rate, and increase the yield of the plants, thereby increasing the income of farmers. The heating component and the refrigeration component here consider two dimensions when supplementing carbon dioxide, one is the carbon dioxide concentration, and the other is the influence of temperature. The combination of the two can achieve a doubling option, which can further increase the yield of the plants and increase the income of farmers. It should be noted that the heating and refrigeration components are written together here because only one of their functions can be used during operation, either only the heating component or only the refrigeration component. The heating component can be an induction cooker, and the refrigeration component can be a semiconductor refrigeration component or a wet curtain refrigeration, etc.

[0034] Furthermore, the PPFD detection component 10 can detect the PPFD on the surface of the plants. When the PPFD data on the surface of the plants is less than the light compensation point, the conveying component is closed and the gas source is closed.

[0035] It includes a carbon dioxide gas source or an oxygen gas source 1, a carbon dioxide bubbling component 2, a carbon dioxide transfer component 3, a carbon dioxide concentration detection component 4, a carbon dioxide concentration adjustment component 5, a heating component and a refrigeration component 8, a temperature detection component 9, and a PPFD detection component 10. These components are electrically connected to each other to control and connect signals. In addition, a conventional control system is also available in the present invention. Since these are all conventional settings for electronic devices, they are not described in detail here because they are all prior art. For those skilled in the art of electronics, they can be developed according to the situation of this patent.

[0036] Since the concentration of the gas can be controlled by the concentration of the bubbles and the flow rate of the water, stable and uniform gas supply can be achieved.

[0037] When using the carbon dioxide source and the oxygen source, only one can be added at a time. When watering, the oxygen source is used. When supplementing carbon dioxide for the plants, dry ice or carbon dioxide gas is used.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants, comprising a carbon dioxide gas source or an oxygen gas source, a carbon dioxide bubbling component, a carbon dioxide transmission component, a carbon dioxide concentration detection component, a carbon dioxide concentration adjustment component, a PPFD detection component, and a temperature detection component.

2. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 1, characterized in that: The carbon dioxide gas source or the oxygen gas source, wherein the carbon dioxide gas source is a combustion source or a dry ice source, and the oxygen gas source is an oxygen source.

3. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 1, characterized in that: The carbon dioxide bubbling component is a micron, nanometer or micro-nano bubbling device.

4. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 1, characterized in that: The carbon dioxide transmission component is a pipe or a ditch that can transmit water and the water inside, and the upper end of the pipe is open.

5. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 1, characterized in that: The carbon dioxide concentration detection component is a semiconductor detection device.

6. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 1, characterized in that: The carbon dioxide concentration regulating component is a carbon dioxide bubbling component, or the carbon dioxide concentration regulating component is a liquid speed regulating component installed on the carbon dioxide transmission component; the liquid speed regulating component is a pump or a blade, and the carbon dioxide delivery amount can be adjusted by adjusting the flow rate or tumbling speed of the liquid, and the corresponding carbon dioxide concentration can be adjusted accordingly; or the concentration of carbon dioxide bubbles generated by the bubble component is controlled to control the concentration of carbon dioxide supplemented to the plants; or the size of the carbon dioxide bubbles generated by the bubble component is controlled to control the rising speed of the bubbles to control the speed of carbon dioxide supplementation, thereby controlling the concentration of carbon dioxide supplemented to the plants.

7. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 4, characterized in that: The water surface opening areas of the pipes at different positions are different. The water surface opening areas of the pipes are used to control the number of carbon dioxide bubbles produced, thereby controlling the concentration of carbon dioxide supplied to the plants.

8. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 4, characterized in that: The carbon dioxide transmission component also includes a heating component, a cooling component and a temperature detection component. The heating component and the cooling component can heat or cool the water in the carbon dioxide transmission component, and the temperature detection component detects the temperature of the air around the plant.

9. A gas mixing and conveying device for improving the photosynthetic rate of greenhouse plants according to claim 1, characterized in that: The PPFD detection component can detect PPFD on the surface of plants.

Images