Duckweed culture device suitable for microgravity environment
By designing a duckweed cultivation device suitable for microgravity environments, the problem of a closed system for liquid cultivation of duckweed in space was solved, achieving stable cultivation and light supply for duckweed, and providing an environmentally friendly cultivation solution.
Patent Information
- Application Number
- CN202520427341.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-12
AI Technical Summary
There is currently no technology that can develop a duckweed cultivation device suitable for microgravity environments, especially a closed system for liquid cultivation, which makes it difficult to stably cultivate duckweed in space or microgravity environments.
A duckweed cultivation device was designed, comprising a main container, a culture bag, a circulation unit, and an air duct. The main container is equipped with a light source. The circulation unit includes first and second pipe units and a liquid storage tank. The culture bag is connected to the pipe unit through a connection port. The air duct supplies oxygen. The culture bag is equipped with a filter screen. The light source is a combination of red, white, and blue light sources. The main container is made of translucent organic plastic material.
Stable cultivation of duckweed under microgravity conditions was achieved, providing suitable light and gas conditions. The culture medium can be reused, the device is easy to harvest and maintain, and the airtightness and stability of the culture bags are ensured. It is suitable for environmentally friendly cultivation in terrestrial simulation of space environment.
Smart Images
Figure CN223786827U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to plant culture technical field especially suitable for duckweed culture device of microgravity environment. BACKGROUND
[0002] At present, astronauts of space experiment station have been able to plant plants such as lettuce by using matrix culture technology. However, for the culture of duckweed in microgravity environment, an effective device has not been developed. The most suitable culture mode of duckweed is liquid culture, which requires that in the special environment of space or microgravity, no liquid overflow must be ensured, so a closed culture system is needed. SUMMARY
[0003] The utility model discloses at least one of the technical problems in the related art is solved. To this end, the utility model provides a duckweed culture device suitable for microgravity environment, which solves the technical problem that duckweed plants are difficult to culture in microgravity environment, and enables stable culture of duckweed plants in microgravity space environment.
[0004] The utility model provides a duckweed culture device suitable for microgravity environment, comprising:
[0005] A main container, a plurality of culture bags are detachably connected inside the main container, culture medium and duckweed are contained in the culture bags, a light source is arranged on the inner side wall of the main container, a first connecting port is arranged on the top of the main container and a second connecting port is arranged on the bottom of the main container;
[0006] A circulating unit, the circulating unit comprises a first pipeline unit, a second pipeline unit and a liquid storage tank, the first pipeline unit is communicated with the plurality of culture bags through the first connecting port, and the second pipeline unit is communicated with the plurality of culture bags through the second connecting port;
[0007] An air pipeline, one end of the air pipeline is communicated with an air storage tank and the other end is communicated with the culture bags through the first connecting port.
[0008] The further improvement of the duckweed culture device suitable for microgravity environment of the utility model is that the main container is a cube, and a detachable door plate is formed on one side of the main container.
[0009] The further improvement of the duckweed culture device suitable for microgravity environment of the utility model is that a plurality of air branch pipelines are communicated with the end of the air pipeline passing through the first connecting port, and the number of the air branch pipelines matches the number of the culture bags.
[0010] The further improvement of the duckweed culture device suitable for microgravity environment of the utility model is that the liquid storage tank is a cylinder.
[0011] The first pipeline unit comprises an upper main pipeline communicated with the top of the liquid storage tank and a plurality of upper branch pipelines communicated with the upper main pipeline, the number of the upper branch pipelines matches the number of the culture bags, and the plurality of upper branch pipelines are connected with the culture bags one by one, and the upper branch pipelines are communicated with the top of the culture bags.
[0012] The second pipeline unit comprises a lower main pipeline communicated with the bottom of the liquid storage tank and a plurality of lower branch pipelines communicated with the lower main pipeline, the number of the lower branch pipelines matches the number of the culture bags, and the plurality of lower branch pipelines are connected with the culture bags one by one, and the lower branch pipelines are communicated with the bottom of the culture bags.
[0013] The further improvement of the duckweed culture device suitable for a microgravity environment is that the top of the culture bag is provided with an air passage connecting port and a first bag interface, the bottom of the culture bag is provided with a second bag interface, the first filter screen is arranged at the air passage connecting port and the second bag interface, the air branch pipeline is communicated with the air passage connecting port, and the lower branch pipeline is communicated with the second bag interface.
[0014] The further improvement of the duckweed culture device suitable for a microgravity environment is that the bottom of the culture bag is provided with a zipper.
[0015] The further improvement of the duckweed culture device suitable for a microgravity environment is that the top and the bottom of the inner side wall of the main container are provided with a plurality of hanging ends, the top and the bottom of the culture bag are provided with hooks, and the hooks are connected with the hanging ends, so that the culture bag is connected with the main container.
[0016] The further improvement of the duckweed culture device suitable for a microgravity environment is that the light source is arranged on the two side portions and the top of the main container.
[0017] The further improvement of the duckweed culture device suitable for a microgravity environment is that the light source comprises a red light source, a white light source and a blue light source.
[0018] The further improvement of the duckweed culture device suitable for a microgravity environment is that the main container is made of light-transmitting organic plastic material.
[0019] The present utility model comprehensively considers the need of closed culture of duckweed under space or microgravity environment, and provides suitable air and light conditions. Meanwhile, the duckweed culture device is convenient for harvesting culture, and can realize reuse of culture solution. Therefore, the duckweed culture device provides an environment-friendly and practical solution for culture of duckweed under simulated space environment on the ground.
[0020] The duckweed culture device is made of organic glass material, and different light quality lamp tubes or bulbs are installed on the inside top and side surface to provide suitable light source. Meanwhile, hooks for fixing culture bags are arranged on the bottom and top of the container. The culture bag is designed to be reusable, made of organic plastic material with excellent light transmission, and convenient for plants to receive light and realize visual observation. In addition, the culture bag can be connected with culture solution liquid and air pipeline, which is convenient for circulation of culture solution and air circulation. A zipper is arranged on one side of the culture bag close to the lower end to facilitate collection of culture materials.
[0021] Additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the present utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0023] Figure 1 is a schematic view of a duckweed culture device suitable for microgravity environment provided by the embodiment of the present utility model.
[0024] Reference signs:
[0025] 1, culture bag; 11, zipper; 2, hook; 3, main container; 4, blue light source; 5, red light source; 6, white light source; 7, air pipeline; 71, air branch pipeline; 81, liquid storage tank; 82, lower main pipeline; 83, lower branch pipeline; 84, upper main pipeline; 85, upper branch pipeline. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.
[0027] The utility model discloses a kind of suitable for microgravity environment's duckweed culture device, including: Figure 1 Described in the utility model a kind of suitable for microgravity environment's duckweed culture device, including:
[0028] Main container 3, the inside of main container 3 is detachably connected with several culture bags 1, culture bag 1 is loaded with culture medium and duckweed, the inner side wall of main container 3 is provided with light source, the top of main container 3 is provided with first connecting port and the bottom is provided with second connecting port;
[0029] Circulation unit, circulation unit includes first pipeline unit, second pipeline unit and liquid storage tank 81, first pipeline unit is communicated with several culture bags 1 by first connecting port, second pipeline unit is communicated with several culture bags 1 by second connecting port;
[0030] Air pipeline 7, one end of air pipeline 7 is communicated with air reserve tank and the other end is communicated with culture bag 1 by first connecting port.
[0031] In a preferred embodiment of the utility model a kind of suitable for microgravity environment's duckweed culture device, main container 3 is cuboid, the side of main container 3 forms detachable door plate, door plate and the rest of main container 3 can be snap-fit connection, by opening door plate, it is convenient to put culture bag 1 into main container 3, it is convenient to collect the duckweed of culture.
[0032] Preferably, microgravity environment can be simulated space environment.
[0033] Further, the air pipe 7 is communicated with a plurality of air branch pipes 71 at the end of the first connecting port, the number of the air branch pipes 71 matches the number of the culture bags 1, so as to conveniently supply oxygen required by the duckweed growing in the culture bags 1, the top of the culture bag 1 is provided with an air passage connecting port, the air passage connecting port is provided with a first filter screen, the air branch pipe 71 is communicated with the air passage connecting port, the first filter screen can effectively prevent the duckweed from entering the air pipe 7 from the air passage connecting port, and the stable growth of the duckweed in the culture bag 1 is ensured, the air pipe 7 is communicated with an air storage tank, and an air pump is further arranged between the air pipe 7 and the air storage tank, the air pump can control the flow of air to meet the oxygen demand of the duckweed in different growth stages, in addition, the air pipe 7 and the air branch pipe 71 are made of transparent material, so as to conveniently observe the air flow and ensure the smooth supply of air.
[0034] Further, the liquid storage tank 81 is a cylinder;
[0035] The first pipe unit includes an upper main pipe 84 communicated with the top of the liquid storage tank 81 and a plurality of upper branch pipes 85 communicated with the upper main pipe 84, the number of the upper branch pipes 85 matches the number of the culture bags 1, the plurality of upper branch pipes 85 and the culture bags 1 are connected one by one, and the upper branch pipes 85 are communicated with the top of the culture bags 1; one end of the upper main pipe 84 is further provided with a second filter screen, the second filter screen can effectively prevent impurities from entering the upper main pipe 84, and the purity of the liquid is ensured;
[0036] The second pipe unit includes a lower main pipe 82 communicated with the bottom of the liquid storage tank 81 and a plurality of lower branch pipes 83 communicated with the lower main pipe 82, the number of the lower branch pipes 83 matches the number of the culture bags 1, the plurality of lower branch pipes 83 and the culture bags 1 are connected one by one, and the lower branch pipes 83 are communicated with the bottom of the culture bags 1; one end of the lower main pipe 82 is provided with a valve, the valve can control the flow of liquid, so as to conveniently adjust the liquid level in each culture bag 1, and meet the water demand of the duckweed in different growth stages. In addition, the lower branch pipe 83 is made of transparent material, so that not only the flow of liquid can be observed, but also the change of the liquid level in the culture bag 1 can be directly monitored, and the duckweed can grow in the suitable liquid level.
[0037] Further, the top of the culture bag 1 is provided with an air passage connecting port and a first bag interface, the bottom of the culture bag 1 is provided with a second bag interface, the air passage connecting port and the second bag interface are provided with a first filter screen, the air branch pipe 71 is communicated with the air passage connecting port, and the lower branch pipe 83 is communicated with the second bag interface.
[0038] The first bag interface is used to connect the upper branch pipe 85, so as to realize the input of the culture medium, and the first filter screen can effectively block the duckweed from entering the liquid storage tank 81, so as to ensure the normal growth of the duckweed in the microgravity environment, and improve the practicability and reliability of the whole culture device.
[0039] Further, the bottom of the culture bag 1 is provided with a zipper 11, which is designed to facilitate the opening and closing of the bottom of the culture bag 1, so as to facilitate the cleaning, maintenance or replacement of the culture medium in the culture bag 1 when needed. In addition, the zipper 11 has good sealing performance, which can effectively prevent the culture medium from leaking and maintain the stability of the internal environment of the culture bag 1, providing a good growth condition for the duckweed and improving the practicability and convenience of the culture bag 1, and further improving the performance and reliability of the whole duckweed culture device.
[0040] Further, the inner side wall of the main container 3 is provided with a plurality of hanging ends at the top and bottom, which can be lifting rings or lifting lugs, and the top and bottom of the culture bag 1 are provided with hooks 2 connected to the hanging ends through the hooks 2, so that the culture bag 1 is connected to the main container. This design not only facilitates the installation and removal of the culture bag 1, but also facilitates the adjustment of the position of the culture bag 1 to adapt to different culture needs. The cooperation of the hanging ends and the hooks 2 can effectively prevent the culture bag 1 from accidentally falling off in the microgravity environment, ensuring the safety and stability of the duckweed culture process. At the same time, the setting of the hanging ends and the hooks 2 also facilitates the quick replacement of the culture bag 1 by the staff, improving the work efficiency. In addition, this design also maintains a certain distance between the culture bag 1 and the main container 3, which is conducive to the circulation of air and liquid, providing a more superior environmental condition for the growth of duckweed.
[0041] Further, the light source is arranged on the two side portions and the top portion of the main container 3, so that the light can uniformly irradiate the duckweed in the culture bag 1, ensuring that the duckweed can obtain sufficient light in the microgravity environment and promoting its normal growth and reproduction. This light source design not only improves the growth efficiency of duckweed, but also makes the whole culture process more controllable and stable. At the same time, the intensity and irradiation time of the light source can be adjusted according to the growth needs of the duckweed to adapt to different culture stages and environmental conditions.
[0042] Specifically, the light source includes a red light source 5, a white light source 6, and a blue light source 4, and the combination of the red light source 5, the white light source 6, and the blue light source 4 can simulate the spectral characteristics of natural light and provide more comprehensive and balanced light conditions for duckweed. The red light source 5 helps to promote photosynthesis and chlorophyll synthesis of duckweed, and improves its growth rate, biomass, and synthesis of flavonoids such as anthocyanins; the white light source 6 provides comprehensive spectral coverage, ensuring that duckweed can obtain sufficient light intensity; and the blue light source 4 helps to promote the synthesis of chlorophyll a, chlorophyll b, and protein of duckweed, further improving its photosynthetic efficiency, growth quality, and nutrient accumulation. This combination design of multiple light sources not only meets the light requirements of duckweed at different growth stages, but also improves its ability to adapt to microgravity environments, and can purposefully promote the synthesis of special nutrients, providing strong support for long-term cultivation of duckweed in space environments.
[0043] Specifically, the main container 3 is made of light-transmitting organic plastic material, which has good light transmission and can ensure effective penetration of the light source to provide sufficient light for duckweed. At the same time, the organic plastic material also has the characteristics of light weight, corrosion resistance, and easy processing, so that the main container 3 can still maintain structural stability and durability in a microgravity environment. In addition, the design of the main container 3 also takes into account the growth characteristics and space utilization efficiency of duckweed, and provides sufficient growth space and good growth environment for duckweed through reasonable size and shape design.
[0044] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solution to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A duckweed cultivation device suitable for microgravity environments, characterized in that, include: The main container has several culture bags detachably connected inside, the culture bags are filled with culture medium and duckweed, the inner side wall of the main container is provided with a light source, the top of the main container is provided with a first connection port and the bottom is provided with a second connection port. The circulation unit includes a first pipeline unit, a second pipeline unit, and a liquid storage tank. The first pipeline unit is connected to a plurality of culture bags through a first connection port, and the second pipeline unit is connected to a plurality of culture bags through a second connection port. An air duct, one end of which is connected to an air storage tank and the other end of which is connected to the culture bag via the first connection port.
2. The duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The main container is cubic in shape, and one side of the main container forms a detachable door panel.
3. The duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The air duct passes through the end of the first connection port and is connected to multiple air branch ducts, the number of which matches the number of culture bags.
4. The duckweed cultivation device suitable for microgravity environments according to claim 3, characterized in that, The storage tank is cylindrical; The first pipeline unit includes an upper main pipeline connected to the top of the storage tank and a plurality of upper branch pipelines connected to the upper main pipeline. The number of upper branch pipelines matches the number of culture bags. The plurality of upper branch pipelines are connected to the culture bags one by one. The upper branch pipelines are connected to the top of the culture bags. The second piping unit includes a lower main pipe connected to the bottom of the storage tank and a plurality of lower branch pipes connected to the lower main pipe. The number of lower branch pipes matches the number of culture bags, and the plurality of lower branch pipes are connected to the culture bags one by one. The lower branch pipes are connected to the bottom of the culture bags.
5. A duckweed cultivation device suitable for microgravity environments according to claim 4, characterized in that, The culture bag has an air channel connection port and a first bag interface at the top, and a second bag interface at the bottom. A first filter screen is provided at the air channel connection port and the second bag interface. An air branch pipe is connected to the air channel connection port, and a lower branch pipe is connected to the second bag interface.
6. The duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The bottom of the culture bag is equipped with a zipper.
7. A duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The inner wall of the main container is provided with several hanging ends at intervals at the top and bottom. The culture bag is provided with hooks at the top and bottom, and is connected to the hanging ends by the hooks so that the culture bag is connected to the main container.
8. A duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The light source is located on the two sides and the top of the main container.
9. A duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The light source includes red light source, white light source and blue light source.
10. A duckweed cultivation device suitable for microgravity environments according to claim 1, characterized in that, The main container is made of translucent organic plastic.