Aquarium water-air interface carbon dioxide gas monitoring linkage control device and method thereof

Abstract

This invention discloses a carbon dioxide gas monitoring and linkage control device and method for the water-air interface of an aquarium, belonging to the technical field of aquarium-related equipment. It includes a container with an open bottom, the opening of which is immersed in the water at the aquarium's water-air interface. A gas enrichment chamber collects carbon dioxide dissolved in the water and escaping from the water-air interface in that area. The carbon dioxide passes through a vent and a waterproof, breathable membrane, and is detected by a sensing unit to generate carbon dioxide concentration data. The control unit calculates the carbon dioxide partial pressure slope and carbon dioxide escape flux based on the carbon dioxide concentration data, and controls the carbon dioxide output of the carbon dioxide supply component based on the carbon dioxide escape flux. This invention enables real-time monitoring of carbon dioxide dissolution in the water, timely reflection of dynamic changes in carbon dioxide concentration, and automatic control of the carbon dioxide supply, ensuring stable photosynthesis of green plants in the aquarium and achieving a dynamic balance of dissolved carbon dioxide in the water.

Description

Technical Field

[0001] This invention belongs to the technical field of aquarium-related equipment and relates to a device and method for monitoring and controlling carbon dioxide gas at the water-air interface in aquariums. Background Technology

[0002] Green plants need carbon dioxide for photosynthesis. To help submerged plants in aquariums grow better, aquarium enthusiasts introduce carbon dioxide gas into the aquarium water. However, the amount of carbon dioxide that can dissolve in water is limited. According to Henry's Law, some of the dissolved carbon dioxide will escape from the water surface into the air.

[0003] Existing aquarium carbon dioxide monitors mainly consist of a glass container, a mounting base, and a reaction solution. The glass container holds the reaction solution, which is fixed to the water surface by the mounting base. Users manually determine the approximate carbon dioxide level in the aquarium based on the color change of the reaction solution. For example, if the initial color of the reaction solution is blue, and it changes from blue to green, it indicates a moderate amount of carbon dioxide has been added; if it changes from green to yellow, it indicates an excessive amount; and if the solution remains blue, it indicates an insufficient amount of carbon dioxide to cause a color change. These monitors require 2-4 hours for the carbon dioxide and reaction solution to fully react and reach equilibrium before color changes can be read. Users cannot immediately know the carbon dioxide concentration in the water, leading to abnormal fluctuations in the aquarium's photosynthetic environment. Furthermore, the reaction solution is toxic bromothymol blue; ingestion can cause harm, and spillage into the aquarium can be toxic to fish and shrimp.

[0004] Therefore, there is an urgent need to design a device that can monitor the solubility of carbon dioxide in water in real time, reflect the dynamic changes of carbon dioxide in water in a timely manner, and automatically control the supply of carbon dioxide to ensure the stability of photosynthesis of green plants in aquariums. Summary of the Invention

[0005] This invention provides a carbon dioxide gas monitoring and linkage control device and method for the water-air interface of an aquarium, aiming to solve the problems of existing carbon dioxide monitors requiring a 2-4 hour wait before color changes can be read, making it impossible to know the carbon dioxide concentration in a timely manner, leading to abnormal fluctuations in the aquarium's water environment, and the toxicity of the reaction solution, which poses certain risks in use.

[0006] To achieve the above objectives, the present invention provides a carbon dioxide gas monitoring and linkage control device for the water-air interface of an aquarium, comprising:

[0007] The container body has an opening at the bottom, which is submerged in the water at the water-air interface of the aquarium. The inner side of the middle part of the container body forms a gas enrichment chamber with the water-air interface. The gas enrichment chamber is isolated from the outside air and is used to collect carbon dioxide that has dissolved in the water and escaped from the water-air interface in this area.

[0008] A sealed structure is constructed on the upper part of the container body. The bottom surface of the sealed structure is connected to the gas enrichment chamber through several ventilation holes. A waterproof and breathable membrane is arranged on the inner side of the bottom surface of the sealed structure so that the carbon dioxide collected in the gas enrichment chamber enters the sealed structure through the ventilation holes and the waterproof and breathable membrane.

[0009] A carbon dioxide supply assembly for introducing carbon dioxide into the water of an aquarium, wherein the container body is located at the end away from the end of the carbon dioxide supply assembly from the water inlet.

[0010] A sensing and detection unit is provided inside the sealed structure. The sensing and detection unit is used to detect carbon dioxide entering the sealed structure and generate data reflecting the carbon dioxide concentration in the gas enrichment chamber.

[0011] The control unit is communicatively connected to the sensing and detection unit and electrically connected to the carbon dioxide supply component. The control unit calculates the carbon dioxide partial pressure slope and carbon dioxide emission flux based on the carbon dioxide concentration data. The control unit controls the carbon dioxide output of the carbon dioxide supply component based on the carbon dioxide emission flux to achieve a dynamic balance of carbon dioxide dissolved in the aquarium water.

[0012] Preferably, the system further includes a data transmission unit, which includes a transmitter and a receiver. The transmitter is electrically connected to the sensing and detection unit and is used to receive carbon dioxide concentration data from the sensing and detection unit. The receiver is used to upload the carbon dioxide concentration data received by the transmitter to a terminal device, which is connected to a control unit.

[0013] Preferably, the sensing and detection unit includes a mounting frame, a circuit board, a carbon dioxide detection sensor, and a temperature sensor. The mounting frame is provided inside the sealed structure, and the circuit board is provided on the mounting frame. The carbon dioxide detection sensor and the temperature sensor are embedded in the circuit board. The circuit board is electrically connected to the carbon dioxide detection sensor and the temperature sensor. The carbon dioxide detection sensor is located above the waterproof and breathable membrane.

[0014] Preferably, the carbon dioxide supply assembly includes a carbon dioxide supply cylinder, an electronic control valve, and a carbon dioxide diffuser. The output end of the carbon dioxide supply cylinder is equipped with an electronic control valve. The carbon dioxide supply cylinder is connected to a carbon dioxide diffuser through the electronic control valve. The carbon dioxide diffuser is arranged in the water of the aquarium, and the container body is positioned inside the aquarium away from the carbon dioxide diffuser.

[0015] Preferably, the carbon dioxide refiner converts the input carbon dioxide into micron-sized bubbles and then releases them into the water.

[0016] Preferably, when the carbon dioxide emission flux is lower than a preset carbon dioxide emission flux threshold, the control unit controls the electronic control valve to open the carbon dioxide output or increase the carbon dioxide output; when the carbon dioxide emission flux is higher than the preset carbon dioxide emission flux threshold, the control unit controls the electronic control valve to stop the carbon dioxide output, so as to maintain a stable carbon dioxide concentration in the aquarium water.

[0017] Preferably, the formula for calculating the partial pressure slope of carbon dioxide is: ,

[0018] in, Let Ptotal be the slope of the carbon dioxide partial pressure accumulated in the gas enrichment chamber, and Ptotal be the atmospheric pressure inside the gas enrichment chamber, taken as 101325 Pa. The rate of change of carbon dioxide concentration;

[0019] The formula for calculating the rate of change in carbon dioxide concentration is as follows: ,in, This is the currently collected carbon dioxide concentration data. This is the carbon dioxide concentration data from the last collection. for and The time interval;

[0020] The formula for calculating the carbon dioxide escape flux is: ,

[0021] Where F(CO2) is the carbon dioxide emission flux, V is the volume of the gas enrichment chamber, R is the gas constant, T is the temperature inside the gas enrichment chamber, and S is the area of ​​the water surface covered by the gas enrichment chamber.

[0022] Preferably, a mounting bracket is fitted on the outer side of the container body, and a soft rubber suction cup that can be adjusted up and down is provided on one side of the mounting bracket. The soft rubber suction cup is vacuum-adhered to the inner side wall of the aquarium.

[0023] Preferably, the sealing structure is provided with a cover plate.

[0024] In addition, to achieve the above objectives, the present invention provides a method for monitoring and controlling carbon dioxide gas at the water-air interface of an aquarium, including the aquarium water-air interface carbon dioxide gas monitoring and control device as described in any of the above claims.

[0025] The advantages of this invention over the prior art are:

[0026] This invention provides a carbon dioxide gas monitoring and linkage control device and method for the water-air interface of an aquarium. By immersing the lower opening of a container in the water at the water-air interface of the aquarium, a gas enrichment chamber collects carbon dioxide dissolved in the water and escaping from the water-air interface within that area. The carbon dioxide passes through a vent and a waterproof and breathable membrane into a sealed structure. A sensing unit detects and generates data reflecting the carbon dioxide concentration within the gas enrichment chamber. The control unit calculates the carbon dioxide partial pressure slope and carbon dioxide emission flux based on the carbon dioxide emission flux, and controls the carbon dioxide output of the carbon dioxide supply component. This device provides real-time monitoring of carbon dioxide dissolution in the water, timely reflection of dynamic changes in carbon dioxide concentration, and automatic control of the carbon dioxide supply, ensuring stable photosynthesis of green plants in the aquarium and achieving a dynamic balance of carbon dioxide in the aquarium water.

[0027] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0030] Figure 3 This is an exploded structural diagram of the present invention;

[0031] Figure 4 This is a schematic cross-sectional view of the container body of the present invention immersed in water.

[0032] Figure 5 This is a schematic diagram of the process of the present invention;

[0033] Figure 6 This is a schematic diagram illustrating the determination of carbon dioxide escape flux according to the present invention;

[0034] Figure 7 This is a schematic diagram showing the supply of carbon dioxide concentration and carbon dioxide emission flux in water according to the present invention.

[0035] Figure 8 This is a schematic diagram of aquarium data testing according to the present invention;

[0036] Figure label:

[0037] 1. Container body; 2. Gas enrichment chamber; 3. Sealing structure; 4. Vent hole; 5. Waterproof and breathable membrane; 6. Fixture; 7. Circuit board; 8. Carbon dioxide detection sensor; 9. Carbon dioxide aerator; 10. Mounting bracket; 11. Soft rubber suction cup; 12. Cover plate. Detailed Implementation

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] To achieve the above objectives, embodiments of the present invention provide a carbon dioxide gas monitoring and linkage control device for the water-air interface of an aquarium, referencing... Figures 1 to 8 As shown, it includes:

[0041] Container 1 has an opening at its lower part, which is submerged in the water at the aquarium's water-air interface. The inner side of the middle part of container 1 forms a gas enrichment chamber 2 with the water-air interface. The gas enrichment chamber 2 is isolated from the outside air and is used to collect carbon dioxide dissolved in the water that escapes from the water-air interface in this area. Container 1 can be a rectangular cover structure made of transparent material, with its lower opening submerged in the water. The immersion depth is determined by observing the water level scale on the outer side, such as 1-3cm. The gas enrichment chamber 2 is jointly constructed by container 1 and the water-air interface, without the need for additional complex cavity structures. The gas enrichment chamber 2 is only connected to dissolved carbon dioxide escaping from the surface of the aquarium water, avoiding the mixing of outside air and thus preventing data distortion.

[0042] The sealed structure 3 is constructed on the upper part of the container body 1. The bottom surface of the sealed structure 3 is connected to the gas enrichment chamber 2 through several ventilation holes 4. A waterproof and breathable membrane 5 is arranged on the inner side of the bottom surface of the sealed structure 3, so that the carbon dioxide collected in the gas enrichment chamber 2 enters the sealed structure 3 through the ventilation holes 4 and the waterproof and breathable membrane 5. The sealed structure 3 provides a closed and dry working environment for the sensing and detection unit, avoiding damage to the detection element caused by water vapor and water flow in the aquarium, and ensuring long-term stable operation of the equipment. The waterproof and breathable membrane 5 has the performance of allowing gas to pass through and blocking water and water vapor to pass through, ensuring full contact between carbon dioxide and the sensing and detection unit, while completely isolating moisture.

[0043] The carbon dioxide supply component is used to input carbon dioxide into the water of the aquarium. The container body 1 is located at the end away from the water input of the carbon dioxide supply component, which can avoid the undissolved air bubbles released by the carbon dioxide supply component and directly enter the gas enrichment chamber 2. This ensures that the gas enrichment chamber 2 collects carbon dioxide that has escaped after dissolution equilibrium in the water, avoids falsely high detection data caused by air bubble interference, and improves the accuracy of monitoring results.

[0044] The sensing and detection unit is located inside the sealed structure 3. The sensing and detection unit is used to detect carbon dioxide entering the sealed structure 3 and generate carbon dioxide concentration data reflecting the gas enrichment chamber 2. The sensing and detection unit directly detects the carbon dioxide concentration that permeates through the waterproof and breathable membrane 5, shortens the detection path and reduces environmental interference, and improves the real-time performance and accuracy of the concentration data. Based on the sensing and detection unit, those skilled in the art can convert the gas concentration into transmittable electrical signal data.

[0045] Furthermore, the sensing and detection unit includes a mounting bracket 6, a circuit board 7, a carbon dioxide detection sensor 8, and a temperature sensor. The mounting bracket 6 is located inside the sealed structure 3, and the circuit board 7 is mounted on the mounting bracket 6. The carbon dioxide detection sensor 8 and the temperature sensor are embedded in the circuit board 7. The circuit board 7 is electrically connected to the carbon dioxide detection sensor 8 and the temperature sensor. The carbon dioxide detection sensor 8 is located above the waterproof and breathable membrane 5. The sealed structure 3 is equipped with a cover plate 12. The carbon dioxide detection sensor 8 is model SCD4x, with a range of 0ppm-40000ppm and a measurement accuracy of ±5%. The temperature sensor is model SPS30, with a range of -10℃-60℃ and a measurement accuracy of ±0.5℃.

[0046] The control unit is communicatively connected to the sensing and detection unit and electrically connected to the carbon dioxide supply component. Based on carbon dioxide concentration data, the control unit calculates the carbon dioxide partial pressure slope and carbon dioxide emission flux. Based on the carbon dioxide emission flux, the control unit controls the carbon dioxide output of the carbon dioxide supply component to achieve a dynamic balance of carbon dioxide in the aquarium water. The control unit acquires carbon dioxide concentration data from the sensing and detection unit through the communication connection, ensuring timely response to control commands. It calculates the carbon dioxide partial pressure slope and carbon dioxide emission flux using a dual-parameter analysis logic, which can determine the carbon dioxide concentration and pH value of the water. This not only reflects the current carbon dioxide concentration status but also predicts the trend of water dissolution balance through the rate of change in carbon dioxide, enabling dynamic adjustment of carbon dioxide output. This avoids insufficient carbon dioxide supply leading to low photosynthetic efficiency in plants and prevents excessive supply causing stress and death in fish and shrimp, ultimately achieving a precise match between the dissolved carbon dioxide in the water and the needs of aquatic organisms and plants.

[0047] Furthermore, it also includes a data transmission unit, which includes a transmitter and a receiver. The transmitter is electrically connected to the sensing and detection unit and is used to receive carbon dioxide concentration data from the sensing and detection unit. The receiver is used to upload the carbon dioxide concentration data received by the transmitter to the terminal device. The terminal device is connected to the control unit and can be a mobile APP, through which the real-time carbon dioxide emission flux can be viewed.

[0048] Furthermore, the carbon dioxide supply component includes a carbon dioxide supply cylinder, an electronic control valve, and a carbon dioxide atomizer 9. The output end of the carbon dioxide supply cylinder is equipped with an electronic control valve, and the carbon dioxide supply cylinder is connected to the carbon dioxide atomizer 9 through the electronic control valve. The carbon dioxide atomizer 9 is arranged in the water of the aquarium, and the container body 1 is positioned in the aquarium away from the carbon dioxide atomizer 9. The carbon dioxide atomizer 9 converts the input carbon dioxide into micron-sized bubbles and releases them into the water.

[0049] In this embodiment, the electronic control valve serves as the actuator of the control unit, enabling precise start / stop and flow regulation of carbon dioxide output. The carbon dioxide atomizer 9 converts carbon dioxide into microbubbles. These micron-sized bubbles have a smaller particle size (5-10 μm), resulting in a longer residence time in the water and a significantly increased contact area with the water, thereby greatly improving the dissolution efficiency of carbon dioxide and reducing ineffective escape. The far-away arrangement of the container body 1 and the carbon dioxide atomizer 9 (e.g., a distance greater than 30 cm) further enhances the avoidance of bubble interference, ensuring that the gas enrichment chamber 2 collects escaped carbon dioxide that truly reflects the dissolved state of the water, providing a reliable data basis for precise control.

[0050] Furthermore, when the carbon dioxide emission flux is lower than the preset carbon dioxide emission flux threshold, the control unit controls the electronic control valve to open the carbon dioxide output or increase the carbon dioxide output; when the carbon dioxide emission flux is higher than the preset carbon dioxide emission flux threshold, the control unit controls the electronic control valve to stop the carbon dioxide output, so as to maintain the carbon dioxide concentration in the aquarium water stable.

[0051] In this embodiment, the preset carbon dioxide emission flux threshold is determined based on the survival standards of organisms in the aquarium and the photosynthetic needs of plants. Through a closed-loop control logic of increasing low flux and decreasing / stopping high flux, the carbon dioxide output is dynamically and adaptively adjusted, avoiding the lag and error of manual adjustment, and ensuring that the carbon dioxide concentration in the water remains stable within a suitable range, taking into account the dual needs of plant growth and organism survival.

[0052] Furthermore, the formula for calculating the partial pressure slope of carbon dioxide is: ,

[0053] in, Let Ptotal be the slope of the carbon dioxide partial pressure accumulated in the gas enrichment chamber, and Ptotal be the atmospheric pressure inside the gas enrichment chamber, taken as 101325 Pa. The rate of change of carbon dioxide concentration;

[0054] The formula for calculating the rate of change in carbon dioxide concentration is as follows: ,in, This is the currently collected carbon dioxide concentration data. This is the carbon dioxide concentration data from the last collection. for and The time interval;

[0055] The formula for calculating the carbon dioxide escape flux is: ,

[0056] Where F(CO2) is the carbon dioxide emission flux, V is the volume of the gas enrichment chamber, R is the gas constant, T is the temperature inside the gas enrichment chamber, and S is the area of ​​the water surface covered by the gas enrichment chamber.

[0057] The formula for calculating the carbon dioxide concentration in water is: C w,CO2 =|F(CO2)×44 / K L |+C weq ,

[0058] Among them, C w,CO2 Where F(CO2) is the carbon dioxide concentration in the water, F(CO2) is the carbon dioxide emission flux, and K is the carbon dioxide concentration in the water. L C is the mass transfer coefficient corresponding to the disturbance intensity. weqThe saturation concentration of carbon dioxide in water to reach equilibrium with carbon dioxide in the air;

[0059] The formula for calculating pH is: pH = 7 - log(C) w,CO2 )+log(3×KH),

[0060] Where KH is the measured carbonate hardness, and C w,CO2 This represents the concentration of carbon dioxide in the water.

[0061] The carbon dioxide concentration change rate can quantify the trend of carbon dioxide concentration change, enabling the control unit to accurately predict the equilibrium state of carbon dioxide dissolution and escape in the water, ensuring the rapid response of the control unit and improving the real-time performance and accuracy of the device's regulation.

[0062] In one optional embodiment, the carbon dioxide detection sensor 8 collects the carbon dioxide concentration in the gas enrichment chamber 2 at a preset period (e.g., 1 minute / time, air temperature 25°C, air carbon dioxide concentration 415 ppm), generating a continuous concentration data sequence. , , ... ), calculate the rate of change of carbon dioxide concentration, the slope of carbon dioxide partial pressure, the carbon dioxide emission flux, the carbon dioxide concentration in the water body, and the pH value according to the formula, where the unit of carbon dioxide emission flux is mol / m³. 2 / min, see reference Figure 6 The diagram shown illustrates the determination of carbon dioxide emission flux and can be used as a basis for state judgment.

[0063] When the carbon dioxide concentration in water exceeds 30 mg / L, it indicates that the water body... The amount dissolved is approaching the survival limit for aquatic animals. A large amount of leakage is considered an oversupply.

[0064] When the carbon dioxide concentration in a water body is below 30 mg / L but above 10 mg / L, it indicates that the water body... The dissolution and escape are in dynamic equilibrium, indicating that the supply is appropriate.

[0065] When the carbon dioxide concentration in water is below 10 mg / L, it indicates that the water body... Insufficient solubility means the plant's photosynthetic needs are not being met, indicating insufficient supply.

[0066] Based on the GB11607-1989 Fisheries Water Quality Standard (Suitable pH for fish and shrimp survival: 6.5-8.5), the suitable carbon dioxide concentration range is 10-30 mg / L, and the suitable pH range is 6.8-7.2, meeting the photosynthetic needs of submerged plants and ensuring the survival safety of fish and shrimp. The pH value of the water body is indirectly reflected by the carbon dioxide escaping flux and the carbon dioxide concentration in the water, eliminating the need for traditional, easily degraded pH test strips or ion exchange probes. Furthermore, the carbon dioxide escaping flux at the water-air interface has a strong negative correlation with pH value, indicating that carbon dioxide dissolves in water to form carbonic acid, as shown in the formula: , The concentration increases with the increase of carbon dioxide dissolution, while the pH value decreases synchronously.

[0067] Based on the aforementioned dual-parameter and pH-related logic, the controller achieves precise dynamic adjustment of carbon dioxide supply, with the supply range executed according to the following rules:

[0068] refer to Figure 7 The diagram shows the supply of carbon dioxide concentration and carbon dioxide emission flux in the water. By inputting the measured KH value and disturbance coefficient in the app, the upper and lower limits of the carbon dioxide emission flux can be set according to the desired pH value and pH range to control the opening and closing of the carbon dioxide valve. For example, in an aquarium with a KH of 4, weak disturbance, and a desired pH value of 6.8-7.2:

[0069] When the detected carbon dioxide flux F(CO2) < 5.09 × 10 -6 mol / m 2 If the flow rate is [value] / min, it is determined to be insufficient, corresponding to a pH > 7.2. The carbon dioxide supply is then increased by 30% of the current flow rate until the carbon dioxide flux F(CO2) > 5.09 × 10⁻⁶. -6 mol / m 2 / min, or open the electronic control valve;

[0070] When the detected carbon dioxide flux F(CO2) > 1.30 × 10 -5 mol / m 2 If the flow rate is measured at a rate of / min, it is determined that the supply is too high, corresponding to a pH < 6.8, and the electronic control valve is shut off.

[0071] refer to Figure 8 The diagram shows a schematic of aquarium data testing. The data table uses typical 24-hour data testing. The state of submerged plants changes from leaf expansion to leaf bubbling, which usually indicates oxygen production through photosynthesis. The fish and shrimp are active throughout the test and do not surface, indicating that dissolved oxygen and other conditions in the water are stable.

[0072] Furthermore, a mounting bracket 10 is fitted on the outer side of the container body 1. A soft rubber suction cup 11 that can be adjusted up and down is provided on one side of the mounting bracket 10. The soft rubber suction cup 11 is vacuum-adhered to the inner side wall of the aquarium. The installation and disassembly of the soft rubber suction cup 11 are simple and convenient. A strip hole can be opened on the side wall of the mounting bracket 10, and the soft rubber suction cup 11 can be hung on the strip hole by screws to realize the up and down adjustment of the soft rubber suction cup 11.

[0073] In addition, to achieve the above objectives, the present invention provides a method for monitoring and controlling carbon dioxide gas at the water-air interface of an aquarium, including any of the above-mentioned devices for monitoring and controlling carbon dioxide gas at the water-air interface of an aquarium.

[0074] This method, based on the aforementioned device, solves the problems of time-consuming monitoring and delayed response of existing technologies that require 2-4 hours to wait for reaction results through the coordinated design of directional gas collection, quantitative detection, dual-parameter regulation, and linkage control. It achieves automated and precise control of carbon dioxide concentration in aquariums; it can maintain the dynamic balance of dissolved carbon dioxide in the water without human intervention, reducing the difficulty of operation for users, while improving the stability and accuracy of regulation. It takes into account both the photosynthetic needs of submerged plants and the survival safety of fish and shrimp, and is suitable for various scenarios such as home viewing, small-scale scientific research, and aquatic plant cultivation, and has broad application value.

[0075] In summary, this invention provides a carbon dioxide gas monitoring and linkage control device for the water-air interface of an aquarium. By immersing the lower opening of the container 1 into the water at the water-air interface of the aquarium, the gas enrichment chamber 2 collects carbon dioxide dissolved in the water and escaping from the water-air interface in that area. The carbon dioxide passes through the vent 4 and a waterproof and breathable membrane 5 into the sealed structure 3. A sensing unit detects and generates data reflecting the carbon dioxide concentration within the gas enrichment chamber 2. The control unit calculates the carbon dioxide partial pressure slope and carbon dioxide escape flux based on the carbon dioxide escape flux, and controls the carbon dioxide output of the carbon dioxide supply component. Through the process of gas collection, detection, transmission, analysis, and regulation, the carbon dioxide concentration in the water is monitored in real time, achieving automated and precise control of the aquarium's carbon dioxide supply. It maintains a dynamic balance of carbon dioxide concentration monitoring in the water without manual intervention, reducing the difficulty of user operation while improving the stability and accuracy of regulation. This ensures the stability of photosynthesis in aquarium plants and is suitable for various scenarios such as home viewing, small-scale scientific research, and aquatic plant cultivation.

[0076] The technical principles of the present invention have been described above with reference to specific embodiments, which are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments; all technical solutions falling within the scope of the present invention's concept are within its protection scope. Those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these will all fall within the protection scope of the present invention.

Claims

1. A carbon dioxide gas monitoring and linkage control device for the water-air interface of an aquarium, characterized in that, include: The container body has an opening at the bottom, which is submerged in the water at the water-air interface of the aquarium. The inner side of the middle part of the container body forms a gas enrichment chamber with the water-air interface. The gas enrichment chamber is isolated from the outside air and is used to collect carbon dioxide that has dissolved in the water and escaped from the water-air interface. A sealed structure is constructed on the upper part of the container body. The bottom surface of the sealed structure is connected to the gas enrichment chamber through several ventilation holes. A waterproof and breathable membrane is arranged on the inner side of the bottom surface of the sealed structure so that the carbon dioxide collected in the gas enrichment chamber enters the sealed structure through the ventilation holes and the waterproof and breathable membrane. A carbon dioxide supply assembly for introducing carbon dioxide into the water of an aquarium, wherein the container body is located at the end away from the end of the carbon dioxide supply assembly from the water inlet. A sensing and detection unit is provided inside the sealed structure. The sensing and detection unit is used to detect carbon dioxide entering the sealed structure and generate data reflecting the carbon dioxide concentration in the gas enrichment chamber. The control unit is communicatively connected to the sensing and detection unit and electrically connected to the carbon dioxide supply component. The control unit calculates the carbon dioxide partial pressure slope and carbon dioxide emission flux based on the carbon dioxide concentration data. The control unit controls the carbon dioxide output of the carbon dioxide supply component based on the carbon dioxide emission flux to achieve a dynamic balance of carbon dioxide dissolved in the aquarium water.

2. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 1, characterized in that, It also includes a data transmission unit, which includes a transmitter and a receiver. The transmitter is electrically connected to the sensing and detection unit and is used to receive carbon dioxide concentration data from the sensing and detection unit. The receiver is used to upload the carbon dioxide concentration data received by the transmitter to a terminal device, which is connected to a control unit.

3. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 1, characterized in that, The sensing and detection unit includes a mounting frame, a circuit board, a carbon dioxide detection sensor, and a temperature sensor. The mounting frame is located inside the sealed structure, and the circuit board is mounted on the mounting frame. The carbon dioxide detection sensor and the temperature sensor are embedded in the circuit board. The circuit board is electrically connected to the carbon dioxide detection sensor and the temperature sensor. The carbon dioxide detection sensor is located above the waterproof and breathable membrane.

4. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 1, characterized in that, The carbon dioxide supply assembly includes a carbon dioxide supply cylinder, an electronic control valve, and a carbon dioxide diffuser. The output end of the carbon dioxide supply cylinder is equipped with an electronic control valve. The carbon dioxide supply cylinder is connected to a carbon dioxide diffuser through the electronic control valve. The carbon dioxide diffuser is arranged in the water of the aquarium, and the container body is positioned inside the aquarium away from the carbon dioxide diffuser.

5. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 4, characterized in that, The carbon dioxide aerator converts the input carbon dioxide into micron-sized bubbles and then releases them into the water.

6. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 4, characterized in that, When the carbon dioxide emission flux is lower than the preset carbon dioxide emission flux threshold, the control unit controls the electronic control valve to open the carbon dioxide output or increase the carbon dioxide output; when the carbon dioxide emission flux is higher than the preset carbon dioxide emission flux threshold, the control unit controls the electronic control valve to stop the carbon dioxide output in order to maintain a stable carbon dioxide concentration in the aquarium water.

7. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 1, characterized in that, The formula for calculating the slope of the carbon dioxide partial pressure is: , in, Let Ptotal be the slope of the carbon dioxide partial pressure accumulated in the gas enrichment chamber, and Ptotal be the atmospheric pressure inside the gas enrichment chamber, taken as 101325 Pa. The rate of change of carbon dioxide concentration; The formula for calculating the rate of change in carbon dioxide concentration is as follows: ,in, This is the currently collected carbon dioxide concentration data. This is the carbon dioxide concentration data from the last collection. for and The time interval; The formula for calculating the carbon dioxide escape flux is: , Where F(CO2) is the carbon dioxide emission flux, V is the volume of the gas enrichment chamber, R is the gas constant, T is the temperature inside the gas enrichment chamber, and S is the area of ​​the water surface covered by the gas enrichment chamber.

8. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 1, characterized in that, The container body is fitted with a mounting bracket on the outside, and one side of the mounting bracket is equipped with an adjustable soft rubber suction cup, which is vacuum-adhered to the inner wall of the aquarium.

9. The aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to claim 1, characterized in that, The sealing structure is equipped with a cover plate.

10. A method for monitoring and controlling carbon dioxide gas at the water-air interface in an aquarium, characterized in that, Using the aquarium water-air interface carbon dioxide gas monitoring and linkage control device according to any one of claims 1-9, the method involves immersing the lower opening of the container into the water at the aquarium water-air interface, allowing the gas enrichment chamber to collect carbon dioxide dissolved in the water and escaping from the water-air interface. The carbon dioxide passes through the vent and a waterproof and breathable membrane into the sealed structure. The sensing unit detects and generates data reflecting the carbon dioxide concentration in the gas enrichment chamber. The control unit calculates the carbon dioxide partial pressure slope and carbon dioxide escape flux based on the carbon dioxide concentration data, and controls the carbon dioxide output of the carbon dioxide supply component based on the carbon dioxide escape flux. Thus, by monitoring the carbon dioxide concentration in the water in real time, the method achieves automated and precise control of the carbon dioxide supply to the aquarium.

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