A light reactor for microalgae culture and an intelligent control system for regulating culture environment

Abstract

The utility model relates to the field of microalgae culture discloses a microalgae culture is with intelligent control system of light reactor and culture environment regulation and control, sets up light reactor, including double -deck culture container and forms isolated space and built -in collet and light supplement lamp strip, opens and closes lid and is equipped with algae liquid pump entrance, liquid discharge valve, sets up fan blade stirring device to the algae liquid flow stirring implementation temperature and light intensity even in culture container, still include the intelligent control system of regulation and control microalgae culture environment: including control module, receive temperature monitoring module, light monitoring module in sensor send temperature, light intensity monitoring data, compare the high, low temperature threshold and constant temperature threshold, high, low light intensity threshold and constant light threshold, control temperature control device and with its constant temperature circulating unit to pump into the heat medium heating, cooling implementation algae liquid temperature control in collet, and control first drive circuit, second drive circuit control multiple LED lamp post, light supplement lamp strip with different brightness and extinguish implementation carry out the algae liquid light intensity adjustment.

Description

Technical Field

[0001] This utility model relates to the field of microalgae cultivation, and in particular to a photoreactor for microalgae cultivation and an intelligent control system for controlling the cultivation environment. Background Technology

[0002] A photoreactor is a device used to carry out chemical reactions using light energy; it is typically used for microalgae cultivation and requires a sunlight source, an independently powered lamp to provide suitable light intensity, and appropriate temperature to achieve efficient cultivation and reproduction of various microalgae.

[0003] Furthermore, to improve the cultivation effect and reproduction efficiency of microalgae, it is necessary to combine natural sunlight and actual room temperature when culturing algae in the photoreactor, and supplement it with one or more power-powered lamp units to achieve real-time supplemental lighting, and use heating / cooling devices to assist in temperature regulation. By monitoring the temperature and light intensity inside the photoreactor in real time, the control device / system analyzes and compares the results with suitable temperature and light intensity, and controls the power and brightness of the power-powered lamps to adjust different power levels, and controls the heating / cooling devices to automatically heat / cool the algae to achieve a more suitable temperature and light intensity environment, thereby optimizing and improving the microalgae cultivation environment and reproduction efficiency.

[0004] In view of this, this application proposes a photoreactor for microalgae cultivation and an intelligent control system for regulating the cultivation environment. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a photoreactor for microalgae cultivation and an intelligent control system for regulating the cultivation environment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: Including photoreactors for microalgae cultivation, and intelligent control systems for intelligent regulation of the microalgae cultivation environment in photoreactors; The photoreactor includes a culture container with several LED light columns of variable light intensity inside, and a fan-blade stirring device installed vertically in the center. The fan-blade stirring device includes a stirring drive rod placed in the culture container and a fan-blade stirring structure thereon, and a stirring drive device placed out of the culture container and used to drive stirring. The intelligent control system includes a control module, a temperature monitoring module and a light monitoring module connected to the control module and receiving in real time the temperature and light monitoring data of the algal solution monitored by the temperature sensor and light sensor configured thereon, a temperature control device connected to the control module and controlling it to adjust the temperature of the algal solution in the container, and first and second drive circuits connected to the control module and controlling the LED light column and supplementary light strip to adjust the light intensity of the algal solution in the container. The culture container is equipped with an isolated space inside the container body. The heating / cooling jacket with a fixed temperature control device inside the container is used to regulate the temperature of the algal solution, and the built-in supplementary light strip is used to provide auxiliary illumination for the algal solution. The control module has a low temperature threshold and a high temperature threshold. When the temperature monitoring data is lower than the matching value and higher than the matching value, the temperature regulation device is controlled to perform heating and cooling to regulate the temperature of the algal solution. When the temperature is within the constant temperature threshold range, the relevant temperature regulation control ends. The control module has a low light intensity threshold, a high light intensity threshold, and when the light intensity monitoring data is lower than or higher than the matching value, the drive circuit controls the LED light column and the supplementary light strip to adjust the light intensity of the algae liquid to a second-high brightness / high brightness or low brightness / no brightness, and maintains the relevant adjustment control when the light intensity is matched to the constant light threshold range.

[0007] Furthermore, the temperature sensor of the temperature monitoring module and the light sensor of the light monitoring module are installed around the stirring drive rod to monitor temperature and light. The stirring drive rod is connected to the stirring drive device and maintains its vertical and centered state when the stirring drive device rotates to drive the stirring drive rod. The fan-blade stirring structure stirs the algal liquid in the culture container to keep it in a flowing state, thereby improving the uniformity of temperature and light monitoring.

[0008] Furthermore, there are multiple LED light pillars, which are connected to the control module through a first driving circuit; The control module receives light intensity monitoring data from the light sensor and compares it with the low light intensity threshold, high light intensity threshold and constant light threshold ranges set within the control module. When the light intensity monitoring data is lower than the low light intensity threshold, a second high level signal is sent to the first driving circuit to control the LED light column to operate at the second high power and implement second high brightness lighting. When the light intensity monitored by the light sensor is still lower than the low light intensity threshold, the control module sends a high level signal to the first driving circuit to control the LED light column to operate at high power and implement high brightness lighting. When the light intensity monitoring data is higher than the high light intensity threshold, a low-level signal is sent to the first driving circuit to control the LED light column to operate at low power and implement low-brightness lighting. When the light intensity monitored by the light sensor is still higher than the high light intensity threshold, the control module sends a second low-level signal to the first driving circuit to control the LED light column to stop illuminating and implement non-working pause.

[0009] Furthermore, after the control module controls the LED light column to illuminate at high brightness, second-highest brightness, and low brightness, and stops working, respectively, when the light intensity monitoring data is within the constant light threshold range, the relevant adjustment control is maintained to keep the different high / low level signal outputs of the LED light column connected to the first driving circuit.

[0010] Furthermore, the temperature control device includes a constant temperature circulating unit and a jacket connected thereto. The constant temperature circulating unit integrates a refrigeration compressor and a pump and works in conjunction with the cooling tower system. The constant temperature circulating unit pumps the heat transfer medium into the jacket channel and regulates the temperature by heating and cooling the heat transfer medium. The heat transfer medium is hot water or heat transfer oil. The control module sends a heating signal to the constant temperature circulation unit, which heats the heat transfer medium to a set high temperature, implements the jacket channel heating, and heats the algal liquid in the adjacent culture container. When the control module sends a cooling signal to the constant temperature circulation unit, the constant temperature circulation unit stops heating the heat transfer medium and starts the refrigeration compressor and cooling tower system to cool the heat transfer medium to the set low temperature, cool the jacket channel, and cool the algal solution in the adjacent culture container.

[0011] Furthermore, the control module receives temperature monitoring data from the temperature sensor and compares it with the low temperature threshold, high temperature threshold, and constant temperature threshold range set within the control module. When the temperature monitoring data is below the low temperature threshold, a heating signal is sent to the constant temperature circulation unit to heat the heat transfer medium to set a high temperature, and the jacket channel is heated to increase the temperature of the algal solution in the culture container. When the temperature monitoring data is higher than the high temperature threshold, a cooling signal is sent to the constant temperature circulation unit so that, on the premise of first stopping the heating function, the refrigeration compressor and cooling tower system are started to implement the cooling of the heat transfer medium to set the low temperature, and the jacket channel is used to reduce the temperature of the algal solution in the culture container.

[0012] Furthermore, after the control module sends heating and cooling signals to the constant temperature circulation unit and implements heating and cooling of the algal solution in the culture container, it compares the temperature monitoring data and finds them within the constant temperature threshold range. Then, it sends a stop signal to the constant temperature circulation unit, causing it to stop heating the heat transfer medium, shut down the refrigeration compressor and cooling tower system, so that the algal solution in the culture container is naturally maintained within the constant temperature threshold range.

[0013] Furthermore, the constant temperature threshold range includes an upper limit and a lower limit of constant temperature; When the control module controls the constant temperature circulating unit to heat the heat transfer medium, it sends a stop signal to stop the heating control of the constant temperature circulating unit after the compared temperature monitoring data reaches the upper limit of the constant temperature. When the control module controls the constant temperature circulating unit to cool the heat transfer medium, it sends a stop signal to stop the cooling control of the constant temperature circulating unit after the compared temperature monitoring data reaches the lower limit of the constant temperature.

[0014] Furthermore, the culture container is provided with two layers of inner and outer walls to form an isolation space. In the isolation space, the jacket is surrounded and adhered to the inner wall, and the outer wall of the culture container is surrounded and adhered to the supplementary light strip, which is connected to the control module of the intelligent control system to receive the supplementary light signal and illuminate the supplementary light.

[0015] Furthermore, the fill light strip is connected to the control module via a second driving circuit; After the control module controls the LED light column to work at high power through the first driving circuit, it compares the light intensity monitoring data sent by the light sensor with the constant light threshold range. When the light intensity monitoring data is still lower than the constant light threshold range, it sends a second high level signal / high level signal to the second driving circuit, so that the supplementary light strip works at second high power / high power to illuminate the algal liquid in the culture container. After the control module controls the LED light column to work at low power through the first driving circuit, it compares the light intensity monitoring data sent by the light sensor with the constant light threshold range. When the light intensity monitoring data is still higher than the constant light threshold range, it sends a sub-level signal / sub-low level signal to the second driving circuit, so that the supplementary light strip works at low power to illuminate the algae liquid in the culture container / does not work and stops illuminating the algae liquid in the container. The control module controls the LED light column to stop illuminating through the first driving circuit, and sends a low-level signal to the second driving circuit to stop the supplementary light bar from working and stop illuminating the algae liquid in the container.

[0016] Furthermore, the culture container is equipped with a drain valve at the bottom and an openable and lockable cover at the top. The openable cover has an algae liquid pump inlet, and the upper part of the openable cover is equipped with the physical part of the intelligent control system. The upper part of the openable cover is equipped with a stirring drive device for a fan-shaped stirring device, and a stirring drive rod and its fan-shaped stirring structure are connected downwards. An LED light column is fixed at the upper part of the openable cover, and the lighting part extends into the culture container. The main body of the culture container is made of transparent high-temperature resistant organic glass.

[0017] This utility model has the following beneficial effects: In this invention, an intelligent control system is configured on the photoreactor for microalgae cultivation to monitor the temperature and light intensity in the microalgae cultivation environment, i.e., the cultivation container. The control module of the intelligent control system performs differential comparative analysis on the two environmental conditions: temperature and light intensity, and performs differential analysis and processing through two different thresholds. This allows for the differential processing and intelligent control of the two main cultivation environments: temperature and light intensity, thereby achieving automatic adjustment of the microalgae cultivation environment and adapting it to a reasonable threshold range, improving the microalgae cultivation effect and reproduction efficiency, resulting in better treatment effects.

[0018] In this invention, the control module of the intelligent control system is equipped with low temperature threshold, high temperature threshold, and constant temperature threshold range. By comparing temperature monitoring data, the heat transfer medium in the heating jacket channel of the constant temperature circulation unit of the low temperature control temperature regulation device and the heat transfer medium in the cooling jacket channel of the constant temperature circulation unit of the high temperature control temperature regulation device are used to effectively regulate the temperature. When the temperature monitoring data matches the constant temperature threshold, heating and cooling are stopped, allowing heating after low temperature and cooling after high temperature. Based on the upper and lower limits of constant temperature, the temperature naturally recovers for a period of time and remains within the constant temperature threshold, providing a reasonable temperature maintenance effect and improving the microalgae cultivation effect and reproduction efficiency.

[0019] In this invention, the control module of the intelligent control system is equipped with low light intensity threshold, high light intensity threshold, and constant light threshold range. By comparing light intensity monitoring data, it controls the main LED light pillars to illuminate at second-highest or even higher power during low light intensity, and controls them to illuminate at low power or even turn off during high light intensity. When the LED light pillars are illuminated at high power and the light intensity monitoring data is still below the constant light threshold, the supplementary lighting strips are controlled to operate at second-highest or even higher power to better place the light intensity monitoring data within the constant light threshold range. Furthermore, when the LED light pillars are operating at low power and the light intensity monitoring data is still above the constant light threshold range, the supplementary lighting strips are controlled to illuminate at low power or even stop illuminating to reduce light intensity. This achieves the maximum light intensity range suitable for microalgae cultivation, improving microalgae cultivation effects and reproduction efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the separation effect of the overall structure of the photoreactor proposed in this utility model; Figure 2 A three-dimensional structural diagram of the opening and closing cover of a photoreactor proposed in this utility model. Figure 3 This is a schematic diagram illustrating the separation effect of the culture container in a photoreactor proposed in this utility model. Figure 4This is a schematic diagram of the overall structure of the intelligent control system for a photoreactor proposed in this utility model.

[0021] Legend: 100. Photoreactor; 110. Culture container; 111. Inner wall of culture container; 112. Outer wall of culture container; 113. Isolation space; 120. Opening and closing lid; 121. Downward protruding rib; 122. Algae liquid pump inlet; 130. Fan-blade stirring device; 131. Stirring drive device; 132. Stirring drive rod; 133. Fan-blade stirring structure; 140. Drain valve; 200. Intelligent control system; 201. Control module; 202. Physical part of intelligent control system; 210. Temperature monitoring module; 211. Temperature sensor; 220. Light monitoring module; 221. Light sensor; 230. Temperature control device; 231. Constant temperature circulation unit; 232. Jacket; 240. First drive circuit; 241. LED light column; 250. Second drive circuit; 251. Supplemental light strip. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1-4 This utility model provides an embodiment of a photoreactor for microalgae cultivation and an intelligent control system for regulating the cultivation environment, including the following technical solutions: The intelligent control system for microalgae cultivation environment in a photoreactor includes a photoreactor 100 for microalgae cultivation and an intelligent control system 200 for intelligent adjustment of the microalgae cultivation environment in the photoreactor 100, which is independently powered.

[0024] The physical part 202 of the intelligent control system 200 is located on the photoreactor 100. The photoreactor 100 is made of high-temperature resistant transparent glass, such as high-temperature resistant plexiglass. The culture container 110 of the photoreactor 100 is a cylindrical body with a drain valve 140 at the bottom and an opening and closing cover 120 at the top that can be fixed. The opening and closing cover 120 is provided with an algae liquid pump inlet 122. The physical part 202 of the intelligent control system 200 is installed at the upper end of the opening and closing cover 120, which houses at least the control module 201. The cylindrical body is designed with inner and outer double layers to form a container isolation space 113 in the middle. Alternatively, the inner and outer double layers can be designed as a single unit and the isolation space 113 can be set to a larger compartment. The opening and closing cover 120 is provided with a downward protruding rib 121 and is housed in the isolation space 113 to close the top opening of the culture container 110.

[0025] The photoreactor 100 has a culture container 110 with several LED light columns 241 of variable light intensity and a vertically centered fan-blade stirring device 130. The fan-blade stirring device 130 includes a stirring drive rod 132 and a fan-blade stirring structure 133 thereon, and a stirring drive device 131 for driving stirring. The stirring drive device 131 of the fan-blade stirring device 130 is installed on the upper end of the opening and closing cover 120 and placed in the culture container, and is connected downward to the stirring drive rod 132 and the fan-blade stirring structure 133 thereon. The LED light columns 241 are fixed to the upper end of the opening and closing cover 120 and extend into the culture container 110 with the lighting part. The LED lights include multiple waterproof light columns and are evenly installed downward in the culture container 110 with the light-emitting body, so as to uniformly illuminate the algal liquid in the culture container 110.

[0026] The intelligent control system 200 includes a control module 201, a temperature monitoring module 210 and a light monitoring module 220 connected to the control module 201, which receive in real time the algal liquid temperature and light monitoring data monitored by the temperature sensor 211 and the light sensor 221 configured therein, a temperature control device 230 connected to the control module 201 and control it to adjust the temperature of the algal liquid in the container, and first and second driving circuits connected to the control module 201 and control the LED light column 241 and the supplementary light strip 251 to adjust the light intensity of the algal liquid in the container. The stirring drive device 131 includes a rotary motor and is powered independently. During the microalgae cultivation process, it rotates at any time to drive the fan-blade stirring structure 133 to rotate and circulate the algal liquid, thus mixing it evenly.

[0027] The microalgae culture space within the culture container 110 is equipped with temperature sensors 211 and light sensors 221 of the temperature monitoring module 210 and light monitoring module 220, such as IP68 waterproof temperature sensors 211 and IP68 waterproof light sensors 221. Further waterproofing protection is implemented using glass encapsulation / epoxy resin potting sealing processes when necessary. Temperature and light monitoring are achieved by installing sensors around the stirring drive rod 132, which is connected to the stirring drive device 131. The stirring drive rod 132 remains vertically centered when the stirring drive device 131 rotates to drive it. The fan-blade stirring structure 133 stirs the algae solution within the culture container 110, keeping it in a flowing state and improving the uniformity of temperature and light monitoring.

[0028] The culture container 110 has a container body isolation space 113, with a heating / cooling jacket 232 of the temperature control device 230 fixed inside for temperature regulation, and a built-in supplementary light strip 251 for auxiliary illumination; the intelligent control system 200 includes a control module 201, which is connected to the temperature monitoring module 210 and the light monitoring module 220 and receives temperature and light monitoring data in real time, is connected to the temperature control device 230 and controls it to regulate the temperature of the algal solution in the container, and is connected to the drive circuit and controls the LED light column 241 and the supplementary light strip 251 to regulate the light intensity of the algal solution in the container.

[0029] The control module 201 has a low temperature threshold and a high temperature threshold. When the temperature monitoring data is lower than or higher than the matching value, the control module 201 controls the temperature regulation device 230 to heat or cool down to adjust the temperature. When the temperature is within the constant temperature threshold range, the control module 201 terminates the relevant temperature regulation control. The control module 201 also has a low light intensity threshold and a high light intensity threshold. When the light intensity monitoring data is lower than or higher than the matching value, the control module 201 controls the LED light column 241 and the supplementary light strip 251 to adjust the light intensity to medium-high brightness / high brightness / low brightness / no brightness. When the light intensity is within the constant light intensity threshold range, the control module maintains the relevant adjustment control.

[0030] Furthermore, there are multiple LED light columns 241, such as three, which are evenly arranged in the culture container 110 and connected to the control module 201 through the first driving circuit 240. The waterproof LED light column 241 has at least a waterproof light body that extends into the culture container 110, while other components such as the lamp head and the first driving circuit 240 are located outside the opening and closing cover 120 and are secured to the receiving through hole of the opening and closing cover 120 by means of an external convex structure.

[0031] The control module 201 receives light intensity monitoring data from the light sensor 221 and compares it with the low light intensity threshold, high light intensity threshold and constant light threshold ranges set in the control module 201. When the light intensity monitoring data is lower than the low light intensity threshold, a second high level signal is sent to the first driving circuit 240 to control the LED lamp post 241 to operate at the second high power and implement second high brightness lighting. When the light intensity monitored by the light sensor 221 is still lower than the low light intensity threshold, the control module 201 sends a high level signal to the first driving circuit 240 to control the LED lamp post 241 to operate at high power and implement high brightness lighting. Furthermore, when the light intensity monitoring data is higher than the high light intensity threshold, a low-level signal is sent to the first driving circuit 240 to control the LED light column 241 to operate at low power and implement low-brightness illumination. When the light intensity monitored by the light sensor 221 is still higher than the high light intensity threshold, the control module 201 sends a second low-level signal to the first driving circuit 240 to control the LED light column 241 to stop illuminating and implement a non-working stop. For example, when the natural light is sufficient for microalgae cultivation during noon, the LED light column 241 is turned off to prevent excessive light intensity from affecting microalgae cultivation.

[0032] Furthermore, after the control module 201 controls the LED light column 241 to illuminate at high brightness, second-high brightness, and low brightness, and stops working, respectively, it maintains the relevant adjustment control when the light intensity monitoring data is within the constant light threshold range, and maintains the different high / low level signal outputs of the LED light column 241 connected to the first driving circuit 240; by comparing multiple light intensity monitoring data with multiple preset temperature thresholds of the control module 201, it automatically executes various light adjustment controls under corresponding conditions, so that the light intensity of the algal culture in the photoreactor 100 under normal weather conditions is kept within the constant light threshold range more often.

[0033] Furthermore, the temperature control device 230 for regulating the algal solution in the culture container 110 of the photoreactor 100 includes a constant temperature circulation unit 231 and a jacket 232 connected thereto. The constant temperature circulation unit 231 integrates a refrigeration compressor and a pump, and works in conjunction with a cooling tower system. The constant temperature circulation unit 231 pumps the heat transfer medium into the channel of the jacket 232, and regulates the temperature by heating and cooling the heat transfer medium. The heat transfer medium is hot water or heat transfer oil. The jacket 232 can be made of various optional materials such as metal and plastic. The constant temperature circulation unit 231 can be placed beside the photoreactor 100, outside the culture container 110, or on top of the opening and closing cover 120, in conjunction with... The connecting pipe of the jacket 232 channel is inserted and arranged through the hollowed-out channel set by the opening and closing cover 120. The jacket 232 channel can be glued to the inner wall 111 of the isolation space 113 with high temperature resistant adhesive. When the heat transfer medium is heated by the constant temperature circulation unit 231, the maximum reference temperature under normal climate and temperature is 50-60 degrees Celsius to avoid excessive temperature contact with the inner wall 111 of the culture container. The heat after local heating is circulated and evenly distributed by the fan blade stirring structure 133 of the stirring drive device 131. The heating temperature can be selected and set by the technicians according to the actual situation and climate conditions.

[0034] The control module 201 sends a heating signal to the constant temperature circulation unit 231, which heats the heat transfer medium to a set high temperature, implements the heating of the jacket 232 channel, and heats the algal solution in the adjacent culture container 110. When the control module 201 sends a cooling signal to the constant temperature circulation unit 231, the constant temperature circulation unit 231 first ensures that the heating of the heat transfer medium is stopped, and then starts the refrigeration compressor and cooling tower system to cool the heat transfer medium to the set low temperature, cools the jacket 232 channel and cools the algal solution in the adjacent culture container 110. The switching details of the relevant heating and cooling control of the constant temperature circulation unit 231, such as switching valves, stopping the heating of the heat transfer medium, and starting the refrigeration compressor and cooling tower system to cool the pumped heat transfer medium, will not be described in detail in this utility model.

[0035] As a preferred embodiment, the relevant control process includes: the control module 201 receives temperature monitoring data from the temperature sensor 211 and compares it with the low temperature threshold, high temperature threshold and constant temperature threshold range set in the control module 201; When the temperature monitoring data is below the low temperature threshold, a heating signal is sent to the constant temperature circulation unit 231 to activate the heater to heat the heat transfer medium to set a high temperature, and to raise the temperature of the jacket 232 channel to increase the temperature of the algal solution in the culture container 110. When the temperature monitoring data exceeds the high temperature threshold, a cooling signal is sent to the constant temperature circulation unit 231, which, after first stopping the heating function, starts the refrigeration compressor and cooling tower system to cool the heat transfer oil medium to a set low temperature and cool the jacket 232 channel to reduce the temperature of the algal solution in the culture container 110. If necessary, after receiving the cooling signal from the control module 201, the constant temperature circulation unit 231 first executes the heating control of the heat transfer medium. The control module 201 is equipped with a PLC controller to perform relevant comparisons and send different control signals.

[0036] Furthermore, after the control module 201 sends heating and cooling signals to the constant temperature circulation unit 231 and implements heating and cooling of the algal solution in the culture container 110, it compares the temperature monitoring data and finds it within the constant temperature threshold range. Then, it sends a stop signal to the constant temperature circulation unit 231, causing it to stop heating the heat transfer medium, shut down the refrigeration compressor and cooling tower system, so that the algal solution in the culture container 110 is naturally maintained within the constant temperature threshold range. The relevant heating / cooling control is then executed again when heating / cooling is required again.

[0037] In a preferred embodiment, the constant temperature threshold range includes an upper limit and a lower limit. When the control module 201 controls the constant temperature circulation unit 231 to heat the heat transfer medium, it sends a stop signal to the constant temperature circulation unit 231 to stop heating control after the compared temperature monitoring data reaches the upper limit of the constant temperature. This realizes that in the heating process, after reaching the upper limit of the standard constant temperature threshold, heating stops and the heat transfer medium cools down naturally in this scenario, thereby increasing and maintaining the temperature of the algal liquid for a certain period of time.

[0038] When the control module 201 controls the constant temperature circulation unit 231 to cool the heat transfer medium, it sends a stop signal to the constant temperature circulation unit 231 to stop cooling control after the compared temperature monitoring data reaches the lower limit of the constant temperature. This realizes that in the cooling process, after reaching the lower limit of the standard constant temperature threshold, the cooling stops, and the heat transfer medium naturally heats up in this scenario, thereby reducing and maintaining the temperature of the algal liquid for a certain period of time.

[0039] Furthermore, the culture container 110 is provided with two layers of inner and outer walls 112 to form an isolation space 113. In the isolation space 113, the jacket 232 surrounds and is bonded to the inner wall 111, and the outer wall 112 of the culture container 110 is surrounded and bonded with a supplementary light strip 251, which is connected to the control module 201 of the intelligent control system 200 to receive supplementary light signals and provide supplementary light. The supplementary light strip 251 is bonded and arranged around the channel of the jacket 232, facing up / down. When working, it improves the light environment of the algal solution and illuminates the dark areas caused by the relevant jacket 232 channels to a certain extent.

[0040] The isolation space 113 is positioned in the center of the culture container 110 by means of the downward protruding rib 121 approaching the inner wall 111 / outer wall 112 of the isolation space 113, so that the opening and closing cover is fixed. Multiple notches are provided to accommodate the connecting channels of the jacket 232, the connecting wires of the supplementary light strip 251, and the second driving circuit 250. The jacket 232 and the supplementary light strip 251 are fixed to the inner wall 111 and the outer wall 112 by means of mechanical measures to stabilize their shape and by pre-applied adhesive. The relevant processing methods refer to several feasible methods in the prior art, which will not be described in detail in this application.

[0041] Furthermore, the supplementary light strip 251 is connected to the control module 201 via the second driving circuit 250; After the control module 201 controls the LED lamp post 241 to work at high power through the first driving circuit 240, it compares the light intensity monitoring data sent by the light sensor 221 with the constant light threshold range. When the light intensity monitoring data is still lower than the constant light threshold range, that is, the lower limit of the range, it sends a second high level signal / high level signal to the second driving circuit 250, so that the supplementary light strip 251 works at second high power / high power to illuminate the algae liquid in the culture container 110. The supplementary light strip 251 is connected to the external light environment to illuminate the light environment outside the algae liquid that cannot be illuminated by the built-in LED lamp post 241.

[0042] The control module 201 controls the LED lamp post 241 to operate at low power through the first driving circuit 240. Then, it compares the light intensity monitoring data sent by the light sensor 221 with the constant light threshold range. If the light intensity monitoring data is still higher than the constant light threshold range, it sends a low-level signal / secondary low-level signal to the second driving circuit 250, so that the supplementary light strip 251 operates at low power to illuminate the algae solution in the culture container 110 / stops illuminating the algae solution in the container. Specifically, a low-level signal is sent first. By comparing the light intensity monitoring data with the constant light threshold range, if the light intensity monitoring data is still higher than the constant light threshold range, a secondary low-level signal is sent to the second driving circuit 251, so that the supplementary light strip 251 stops illuminating the algae solution in the container.

[0043] The control module 201 controls the LED lamp post 241 to stop illuminating the algae liquid in the container by controlling the first driving circuit 240 to stop the operation. It also sends a low-level signal to the second driving circuit 250 to stop the supplementary light strip 251 from working and terminating the illumination of the algae liquid in the container.

[0044] It is worth noting that in the description of this utility model, "high" is higher than "second highest", and "second lowest" is lower than "low".

[0045] Furthermore, the culture container 110 is equipped with a drain valve 140 at the bottom, and a support device is used to support the drain space of the drain valve 140 and connect an external drain pipe for draining and collecting the algae solution. When the drain valve 140 is closed, it ensures a leak-proof container for algae solution. The top-opening and lockable cover 120 is equipped with an algae solution pump inlet 122, and a water pump draws water into the algae solution through the algae solution pump inlet 122. The upper part of the cover 120 is equipped with the physical part 202 of the intelligent control system 200, and the intelligent control system is configured inside the physical part 202. The upper end of the opening and closing cover 120 is equipped with a stirring drive device 131 of a fan-blade stirring device 130, and is connected to a stirring drive rod 132 and a fan-blade stirring structure 133 above it. The fan-blade stirring structure 133 is configured in multiple stages, located at multiple different heights and with multiple fan blades respectively. The opening and closing cover 120 is fixed with an LED light column 241 at the upper end, and the lighting part extends into the culture container 110 and is close to the bottom. The main body of the culture container 110 is made of transparent high-temperature resistant organic glass.

[0046] Working principle: The installation standard of the photoreactor 100 is as follows: a jacket 232 of the temperature control device 230 is installed in the isolation space 113, and its connecting pipe to the constant temperature circulation unit 231 is extended to the outside of the opening and closing cover 120 through the hollowed-out channel, connecting to the constant temperature circulation unit 231; a supplementary light strip 251 is installed in the isolation space 113, and a connecting line and a second driving circuit 250 are extended outward through the hollowed-out channel of the opening and closing cover 120; the opening and closing cover 120 is fixed in the isolation space 113 by the downward protrusion 121; LED light columns 241 are pre-installed on the opening and closing cover 120, and the first driving circuit 240 is placed on the outside of the opening and closing cover 120, and the light is connected to the outside of the opening and closing cover 120. The outer ribbed structure of the lamp head is locked onto the through hole of the opening and closing cover 120. The waterproof light lamp body extends into the culture container 110. The fan blade stirring device 130 is pre-installed on the opening and closing cover 120. That is, the stirring drive device 131 is installed on the upper end of the opening and closing cover 120 and connected downward to the stirring drive rod 132 and the fan blade stirring structure 133 on it. The temperature monitoring module 210 and the waterproof temperature sensor 211 and the waterproof light sensor 221 of the light monitoring module 220 are fixed on the outside of the stirring drive rod 132. For example, the waterproof temperature sensor 211 and the waterproof light sensor 221 are wrapped and fixed by connecting a transparent plastic hollow shell and using it to complete the waterproof electrical connection with the control module 201.

[0047] When cultivating microalgae in the photoreactor 100, the drain valve 140 is closed, and the algal solution is pumped into the culture container 110 through the algal solution pump inlet 122 using a water pump. The independently powered fan-blade stirring device 130 causes the stirring drive device 131 to rotate at any time, driving the stirring drive rod 132 to perform the rotation process. The fan-blade stirring structure 133 stirs the culture algal solution to make it flow and achieves a certain degree of uniformity of light and temperature in multiple places. During the algae cultivation process, the control module 201 of the intelligent control system 200 receives temperature monitoring data sent by the temperature monitoring module 210 in real time. It compares the data with multiple temperature thresholds and light intensity thresholds set within the control module 201. When the temperature is below the low temperature threshold, a heating signal is sent to the constant temperature circulation unit 231 of the temperature control device 230 to initiate the heating process. When the temperature is above the high temperature threshold, a cooling signal is sent to the constant temperature circulation unit 231 of the temperature control device 230 to initiate the cooling process. Once the temperature monitoring data falls within the constant temperature threshold range, a stop signal is sent to the constant temperature circulation unit 231 to stop heating the heat transfer oil / heat transfer water, shut down the refrigeration compressor and the cooling tower system, and, in conjunction with the control references for the upper and lower constant temperature limits, ensure that the algae in the cultivation container 110 is naturally maintained within the constant temperature threshold range.

[0048] During the algae cultivation process, the control module 201 of the intelligent control system 200 receives light intensity monitoring data sent by the light intensity monitoring module in real time. It compares the data with multiple light intensity thresholds set in the control module 201. When the light intensity is lower than the low light intensity threshold, it sends a second-high level signal to the first driving circuit 240 to control the LED lamp post 241 to operate at the second-highest power and implement second-highest brightness illumination. When the light intensity monitored by the light sensor 221 is still lower than the low light intensity threshold, the control module 201 sends a high level signal to the first driving circuit 240 to control the LED lamp post 241 to operate at high power and implement high brightness illumination. Furthermore, when the light intensity monitoring data is higher than the high light intensity threshold, a low-level signal is sent to the first driving circuit 240 to control the LED lamp post 241 to operate at low power and implement low-brightness illumination. When the light intensity monitored by the light sensor 221 is still higher than the high light intensity threshold, the control module 201 sends a second low-level signal to the first driving circuit 240 to control the LED lamp post 241 to stop illuminating and implement a non-working stop. For example, when the natural light is sufficient for microalgae cultivation during noon, the LED lamp post 241 is turned off to prevent excessive light intensity from affecting microalgae cultivation. And after the control module 201 controls the LED light column 241 to illuminate at high brightness, high brightness, and low brightness and stop working, respectively, when the light intensity monitoring data is within the constant light threshold range, the relevant adjustment control is maintained to maintain the different high / low level signal output of the LED light column 241 connected to the first driving circuit 240; By comparing multiple light intensity monitoring data with preset temperature thresholds of multiple control modules 201, various light adjustment controls are automatically executed under corresponding conditions to ensure that the light intensity for algal culture in the photoreactor 100 under normal weather conditions is kept within the constant light threshold range.

[0049] Furthermore, after the control module 201 controls the LED lamp post 241 to operate at high power through the first driving circuit 240, it compares the light intensity monitoring data sent by the light sensor 221 with the constant light threshold range. When the light intensity monitoring data is still lower than the constant light threshold range, i.e., the lower limit of the range, it sends a second high-level signal / high-level signal to the second driving circuit 250, so that the supplementary light strip 251 operates at second high power / high power to illuminate the algal solution in the culture container 110. The supplementary light strip 251 is connected to the external light environment to illuminate the algal solution environment that the built-in LED lamp post 241 cannot illuminate. After the control module 201 controls the LED lamp post 241 to work at low power through the first driving circuit 240, it compares the light intensity monitoring data sent by the light sensor 221 with the constant light threshold range. When the light intensity monitoring data is still higher than the constant light threshold, that is, the upper limit of the range, it sends a second low level signal to the second driving circuit 250, so that the supplementary light strip 251 works at low power to illuminate the algae liquid in the culture container 110, or stops illuminating the algae liquid in the container.

[0050] The intelligent control system 200 is independently powered and can be powered off without performing intelligent adjustments to the microalgae cultivation environment, thus adapting to scenarios requiring intelligent adjustment.

[0051] After the microalgae cultivation is completed, the algal solution is discharged through the drain valve 140, and the operation of the relevant systems, modules and structures is stopped. The opening and closing cover 120 is opened for cleaning so that it can be recycled.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A photoreactor for microalgae cultivation and an intelligent control system for regulating the cultivation environment, characterized in that: Including photoreactors for microalgae cultivation, and intelligent control systems for intelligent regulation of the microalgae cultivation environment in photoreactors; The photoreactor includes a culture container with several LED light columns of variable light intensity inside, and a fan-blade stirring device installed vertically in the center. The fan-blade stirring device includes a stirring drive rod placed in the culture container and a fan-blade stirring structure thereon, and a stirring drive device placed out of the culture container and used to drive stirring. The intelligent control system includes a control module, a temperature monitoring module and a light monitoring module connected to the control module and receiving in real time the temperature and light monitoring data of the algal solution monitored by the temperature sensor and light sensor configured thereon, a temperature control device connected to the control module and controlling it to adjust the temperature of the algal solution in the container, and first and second drive circuits connected to the control module and controlling the LED light column and supplementary light strip to adjust the light intensity of the algal solution in the container. The culture container is equipped with an isolated space inside the container body. The heating / cooling jacket with a fixed temperature control device inside the container is used to regulate the temperature of the algal solution, and the built-in supplementary light strip is used to provide auxiliary illumination for the algal solution. The control module has a low temperature threshold and a high temperature threshold. When the temperature monitoring data is lower than the matching value and higher than the matching value, the temperature regulation device is controlled to perform heating and cooling to regulate the temperature of the algal solution. When the temperature is within the constant temperature threshold range, the relevant temperature regulation control ends. The control module has a low light intensity threshold, a high light intensity threshold, and when the light intensity monitoring data is lower than or higher than the matching value, the drive circuit controls the LED light column and the supplementary light strip to adjust the light intensity of the algae liquid to a second-high brightness / high brightness or low brightness / no brightness, and maintains the relevant adjustment control when the light intensity is matched to the constant light threshold range.

2. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 1, characterized in that: The temperature sensor of the temperature monitoring module and the light sensor of the light monitoring module are installed around the stirring drive rod to monitor temperature and light. The stirring drive rod is connected to the stirring drive device and maintains its vertical and centered state when the stirring drive device rotates to drive the stirring drive rod. The fan-blade stirring structure stirs the algal liquid in the culture container to keep it in a flowing state, thereby improving the uniformity of temperature and light monitoring.

3. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 2, characterized in that: The LED light columns are multiple and are connected to the control module through a first driving circuit; The control module receives light intensity monitoring data from the light sensor and compares it with the low light intensity threshold, high light intensity threshold and constant light threshold ranges set within the control module. When the light intensity monitoring data is lower than the low light intensity threshold, a second high level signal is sent to the first driving circuit to control the LED light column to operate at the second high power and implement second high brightness lighting. When the light intensity monitored by the light sensor is still lower than the low light intensity threshold, the control module sends a high level signal to the first driving circuit to control the LED light column to operate at high power and implement high brightness lighting. When the light intensity monitoring data is higher than the high light intensity threshold, a low-level signal is sent to the first driving circuit to control the LED light column to operate at low power and implement low-brightness lighting. When the light intensity monitored by the light sensor is still higher than the high light intensity threshold, the control module sends a second low-level signal to the first driving circuit to control the LED light column to stop illuminating and implement non-working pause.

4. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 3, characterized in that: The control module controls the LED light column to illuminate at high brightness, second-highest brightness, and low brightness, and to stop working. When the light intensity monitoring data is within the constant light threshold range, the module maintains the relevant adjustment control and keeps the different high / low level signals output to the LED light column connected to the first driving circuit.

5. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 2, characterized in that: The temperature control device includes a constant temperature circulating unit and a jacket connected thereto. The constant temperature circulating unit integrates a refrigeration compressor and a pump and works in conjunction with the cooling tower system. The constant temperature circulating unit pumps the heat transfer medium into the jacket channel and regulates the temperature by heating and cooling the heat transfer medium. The heat transfer medium is hot water or heat transfer oil. The control module sends a heating signal to the constant temperature circulation unit, which heats the heat transfer medium to a set high temperature, implements the jacket channel heating, and heats the algal liquid in the adjacent culture container. When the control module sends a cooling signal to the constant temperature circulation unit, the constant temperature circulation unit stops heating the heat transfer medium and starts the refrigeration compressor and cooling tower system to cool the heat transfer medium to the set low temperature, cool the jacket channel, and cool the algal solution in the adjacent culture container.

6. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 5, characterized in that: The control module receives temperature monitoring data from the temperature sensor and compares it with the low temperature threshold, high temperature threshold and constant temperature threshold range set in the control module. When the temperature monitoring data is below the low temperature threshold, a heating signal is sent to the constant temperature circulation unit to heat the heat transfer medium to set a high temperature, and the jacket channel is heated to increase the temperature of the algal solution in the culture container. When the temperature monitoring data is higher than the high temperature threshold, a cooling signal is sent to the constant temperature circulation unit so that, on the premise of first stopping the heating function, the refrigeration compressor and cooling tower system are started to implement the cooling of the heat transfer medium to set the low temperature, and the jacket channel is used to reduce the temperature of the algal solution in the culture container.

7. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 6, characterized in that: After the control module sends heating and cooling signals to the constant temperature circulation unit and implements heating and cooling of the algal solution in the culture container, it compares the temperature monitoring data and finds them within the constant temperature threshold range. Then, it sends a stop signal to the constant temperature circulation unit, causing it to stop heating the heat transfer medium, shut down the refrigeration compressor and cooling tower system, so that the algal solution in the culture container is naturally maintained within the constant temperature threshold range.

8. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 7, characterized in that: The constant temperature threshold range includes an upper limit and a lower limit of constant temperature. When the control module controls the constant temperature circulating unit to heat the heat transfer medium, it sends a stop signal to the constant temperature circulating unit to stop heating control after the compared temperature monitoring data reaches the upper limit of the constant temperature. When the control module controls the constant temperature circulating unit to cool the heat transfer medium, it sends a stop signal to stop the cooling control of the constant temperature circulating unit after the compared temperature monitoring data reaches the lower limit of the constant temperature.

9. The photoreactor for microalgae cultivation and the intelligent control system for regulating the cultivation environment according to claim 8, characterized in that: The culture container is provided with two layers of inner and outer walls to form an isolation space. In the isolation space, the jacket is surrounded and adhered to the inner wall, and the outer wall of the culture container is surrounded and adhered to the supplementary light strip, which is connected to the control module of the intelligent control system to receive the supplementary light signal and illuminate the supplementary light.

10. A photoreactor for microalgae cultivation and an intelligent control system for regulating the cultivation environment according to any one of claims 1-9, characterized in that: The supplementary light strip is connected to the control module via a second driving circuit; After the control module controls the LED light column to work at high power through the first driving circuit, it compares the light intensity monitoring data sent by the light sensor with the constant light threshold range. When the light intensity monitoring data is still lower than the constant light threshold range, it sends a second high level signal / high level signal to the second driving circuit, so that the supplementary light strip works at second high power / high power to illuminate the algal liquid in the culture container. After the control module controls the LED light column to work at low power through the first driving circuit, it compares the light intensity monitoring data sent by the light sensor with the constant light threshold range. When the light intensity monitoring data is still higher than the constant light threshold range, it sends a sub-level signal / sub-low level signal to the second driving circuit, so that the supplementary light strip works at low power to illuminate the algae liquid in the culture container / does not work and stops illuminating the algae liquid in the container. The control module controls the LED light column to stop illuminating through the first driving circuit, and sends a low-level signal to the second driving circuit to stop the supplementary light bar from working and stop illuminating the algae liquid in the container.

11. A photoreactor for microalgae cultivation and an intelligent control system for regulating the cultivation environment according to any one of claims 1-9, characterized in that: The culture container is equipped with a drain valve at the bottom and a top-opening, lockable cover. The cover has an algae slurry pump inlet and a physical part of an intelligent control system is installed at the top. A stirring drive device for a fan-shaped stirring device is installed at the top of the cover, and a stirring drive rod and its fan-shaped stirring structure are connected downwards. An LED light column is fixed at the top of the cover, with the lighting part extending into the culture container. The main body of the culture container is made of transparent, high-temperature resistant organic glass.

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