Dissolved oxygen guarantee system for circulating water culture pond

Abstract

The invention provides a dissolved oxygen guarantee system for a circulating water culture pond. The dissolved oxygen guarantee system for the circulating water culture pond comprises an oxygen source device, a pure oxygen aeration and dissolved oxygen device, a dissolved oxygen online monitoring device, a control device and a standby power supply. And the pure oxygen aeration and oxygen dissolving device is connected to an oxygen source device. The dissolved oxygen online monitoring device is suitable for being arranged in a culture pond. And the control device is in communication connection with the pure oxygen aeration oxygen dissolving device and the dissolved oxygen online monitoring device. The standby power supply is electrically connected to the pure oxygen aeration oxygen dissolving device, the dissolved oxygen online monitoring device and the control device. The control device is configured to control the pure oxygen aeration oxygen dissolving device to be in an on-off state according to the actual dissolved oxygen amount detected by the dissolved oxygen online monitoring device and preset dissolved oxygen interval parameters. The state of the pure oxygen aeration oxygen dissolving device can be automatically controlled, so that the dissolved oxygen amount of the culture pond is automatically managed.

Description

Technical Field

[0001] This disclosure generally relates to the technical field of aquaculture, and more specifically to a dissolved oxygen protection system for recirculating aquaculture ponds. Background Technology

[0002] In recent years, to address the drawbacks of traditional farming methods, such as the depletion of natural resources, environmental pollution, and reliance on weather conditions, recirculating aquaculture systems (RAS) have gradually replaced traditional farming methods. The main advantages of RAS lie in automated equipment and high-density farming, resulting in high yields while reducing labor costs and simplifying management. However, existing RAS systems still have some shortcomings.

[0003] Fish require a sufficient supply of dissolved oxygen to metabolize in water. When the dissolved oxygen level is low, fish will surface for air. Extremely low dissolved oxygen levels can cause fish to suffocate and die. Therefore, if insufficient dissolved oxygen in aquaculture ponds goes unnoticed, fish will die from oxygen deprivation, resulting in losses.

[0004] Therefore, there is a need to provide a dissolved oxygen guarantee system for recirculating aquaculture ponds to at least partially solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this disclosure provides a dissolved oxygen supply system for recirculating aquaculture ponds, the recirculating aquaculture pond dissolved oxygen supply system comprising: Oxygen source device; A pure oxygen aeration and oxygenation device is connected to the oxygen source device and is suitable for connection to an aquaculture pond; An online dissolved oxygen monitoring device is suitable for installation in the aquaculture pond to monitor the actual dissolved oxygen content in the water within the pond. The control device is communicatively connected to the pure oxygen aeration and dissolved oxygen device and the dissolved oxygen online monitoring device; and A backup power supply is electrically connected to the pure oxygen aeration and dissolved oxygen device, the dissolved oxygen online monitoring device, and the control device. This backup power supply provides a safe DC voltage, which is less than or equal to 24V. The control device is configured as follows: The system receives the actual dissolved oxygen level detected by the online dissolved oxygen monitoring device and compares the actual dissolved oxygen level with a preset dissolved oxygen range parameter, which includes a lower dissolved oxygen limit and an upper dissolved oxygen limit. If the actual dissolved oxygen level reaches or falls below the lower dissolved oxygen limit, the system controls the pure oxygen aeration dissolved oxygen device to be in an on state. If the actual dissolved oxygen level reaches or exceeds the upper dissolved oxygen limit, the system controls the pure oxygen aeration dissolved oxygen device to be in a off state. The pure oxygen aeration dissolved oxygen device in the on state enables the oxygen source device to supply oxygen to the aquaculture pond, and the pure oxygen aeration dissolved oxygen device in the off state enables the oxygen source device to stop supplying oxygen to the aquaculture pond.

[0007] Optionally, the dissolved oxygen supply system for the recirculating aquaculture pond includes: A power supply device, comprising a mains power supply circuit and a backup power generation circuit, wherein the mains power supply circuit is adapted to be electrically connected to a mains power source, and the backup power generation circuit is adapted to be electrically connected to a power generation device; Main circuit; and A dual-power automatic transfer switch is provided, wherein the input terminal of the dual-power automatic transfer switch is electrically connected to the power supply device, and the output terminal of the dual-power automatic transfer switch is electrically connected to the main circuit. The dual-power automatic transfer switch is configured to automatically switch to the backup power generation circuit when the mains power supply circuit is de-energized, and to automatically switch to the mains power supply circuit when the mains power supply circuit is energized.

[0008] Optionally, the dissolved oxygen guarantee system for the recirculating aquaculture pond further includes: The control circuit is electrically connected to the main circuit, the backup power supply, and the control device. The main circuit supplies power to the control circuit, the backup power supply supplies power to the control circuit, and the control circuit supplies power to the pure oxygen aeration dissolved oxygen device and the dissolved oxygen online monitoring device through the control device.

[0009] Optionally, the backup power supply has an uninterruptible power supply and a switching power supply. The uninterruptible power supply is electrically connected to the main circuit. The uninterruptible power supply is used to store electrical energy and continuously provide AC power. The switching power supply is used to convert the AC power into DC power that conforms to the safety voltage.

[0010] Optionally, the dissolved oxygen supply system for the recirculating aquaculture pond includes: A first power failure detection circuit is electrically connected to the main circuit and communicatively connected to the control device. The first power failure detection circuit is used to detect a first power failure signal and a first power-on signal of the mains power supply circuit. The alarm is electrically connected to the power supply device, and the alarm is communicatively connected to the control device. The control device is also configured to: The first power failure signal is acquired, and the alarm is controlled to operate according to the first power failure signal.

[0011] Optionally, the control loop includes: A first control branch circuit, the first control branch circuit including the control device and a first fuse, the control device being electrically connected to the backup power supply via the first fuse; The second control branch circuit includes the pure oxygen aeration and dissolved oxygen device and a second fuse, wherein the pure oxygen aeration and dissolved oxygen device is electrically connected to the backup power supply via the second fuse; and The third control branch circuit includes the dissolved oxygen online monitoring device and the third fuse, and the dissolved oxygen online monitoring device is electrically connected to the backup power supply via the third fuse.

[0012] Optionally, the dissolved oxygen supply system for the recirculating aquaculture pond includes: The second power failure detection circuit is electrically connected to the mains power supply circuit and communicatively connected to the control device. The second power failure detection circuit is used to detect the second power failure signal and the second power-on signal of the main circuit. The control device is also configured to: Upon receiving the first power-on signal and the second power-off signal, the system controls the operation to run in energy-saving mode.

[0013] Optionally, the control device includes a controller and a touch screen, wherein the controller is communicatively connected to the touch screen, the pure oxygen aeration dissolved oxygen device, and the dissolved oxygen online monitoring device.

[0014] Optionally, the recirculating aquaculture pond dissolved oxygen protection system further includes a recirculating water treatment device, which is adapted to be connected to the aquaculture pond via a pipeline. The recirculating water treatment device is electrically connected to the main circuit and communicatively connected to the control device. The control device is further configured to control the recirculating water treatment device to drive the water circulation in the aquaculture pond and to treat the water quality in the aquaculture pond.

[0015] Optionally, the circulating water treatment equipment includes a physical filtration device, a biological filtration device, a circulating water dissolved oxygen device, a disinfection device, and a circulating water pump connected in sequence. The physical filtration device is adapted to be connected to the aquaculture pond, and the circulating water pump is adapted to be connected to the aquaculture pond. The physical filtration device, the biochemical filtration device, the disinfection device, the circulating water dissolved oxygen device, and the circulating water pump are electrically connected to the main circuit, and are communicatively connected to the control device. The control device is also configured to control the status of the physical filtration device, the biochemical filtration device, the disinfection device, the circulating water dissolved oxygen device, and the circulating water pump.

[0016] The beneficial effects of this disclosure are: According to the dissolved oxygen maintenance system for recirculating aquaculture ponds disclosed herein, the actual dissolved oxygen level in the pond is monitored by an online dissolved oxygen monitoring device. The control device automatically controls the state of the pure oxygen aeration device when the actual dissolved oxygen level reaches the preset lower and upper limits of the dissolved oxygen range parameters. Specifically, when the actual dissolved oxygen level reaches the lower limit, the control device turns the pure oxygen aeration device on, thereby supplying oxygen to the pond and supplementing its oxygen supply. When the dissolved oxygen level reaches the upper limit, the control device turns the pure oxygen aeration device off, thus maintaining the actual dissolved oxygen level in the pond within a suitable range. By employing the above technical means, the dissolved oxygen level in the pond can be automatically maintained within a preset range to meet the oxygen requirements of the cultured organisms, thereby helping to prevent losses due to oxygen deficiency. Furthermore, by equipping the dissolved oxygen online monitoring device, the pure oxygen aeration dissolved oxygen device, and the control device with backup power supplies, these low-voltage devices can operate normally even in the event of abnormal power supply to the main circuit or failure of the dissolved oxygen device in the main circuit, thereby ensuring normal dissolved oxygen levels in the aquaculture pond. Attached Figure Description

[0017] The following drawings, which illustrate embodiments of this disclosure, are incorporated herein by reference as part of this disclosure and are used to understand this disclosure. The drawings show embodiments of this disclosure and their descriptions, serving to explain the principles of this disclosure. In the drawings, Figure 1 This is a schematic diagram of a dissolved oxygen protection system for a recirculating aquaculture pond according to one embodiment of the present disclosure; Figure 2 for Figure 1 The diagram shown is a partial control flow chart of the dissolved oxygen protection system for a recirculating aquaculture pond. Figure 3 A circuit diagram of a power supply device for a dissolved oxygen supply system for a recirculating aquaculture pond according to one embodiment of the present disclosure; Figure 4 A circuit diagram of the power supply device, dual power automatic transfer switch, and main circuit in the connected state of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure. Figure 5 for Figure 3 A schematic diagram showing the connection between the dual power automatic transfer switch, indicator lights, and the second intermediate relay. Figure 6 This is a schematic diagram showing the connection of the normally closed contact of the first intermediate relay and the normally open contact of the second intermediate relay to the controller. Figure 7 A circuit diagram of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure, including a portion of the main circuit. Figure 8 A circuit diagram of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure, including another part of the main circuit. Figure 9 A circuit diagram of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure, including a portion of the control loop. Figure 10 A circuit diagram of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure, including another part of the control loop. Figure 11 A circuit diagram of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure, including a further portion of the control loop; and Figure 12 This is a circuit diagram of a recirculating aquaculture pond dissolved oxygen protection system according to one embodiment of the present disclosure, including a portion of the control loop.

[0018] Explanation of reference numerals in the attached figures: 100: Dissolved Oxygen Supply System for Recirculating Aquaculture Ponds 101: Oxygen Source Device 102: Pure oxygen aeration and dissolved oxygen device 103: Pure oxygen aeration components 104: Electric ball valve 105: Dissolved oxygen online monitoring device 106: Dissolved oxygen meter 110: Control device 111: Controller 112: Digital input module 113: Analog Input Module 114: Switch Output Module 115: Touchscreen 116: Control cabinet 120: Power supply device 121: Mains power supply circuit 122: Backup power generation circuit 126: Main circuit 127: Control loop 128: Main circuit branch 130: Backup power supply 133: First power failure detection circuit 134: Alarm 135: First control branch loop 136: Second control branch loop 137: Third control branch loop 138: Second power failure detection circuit 139: Fourth control branch loop 150: Circulating water treatment equipment 151: Physical filtration device 152: Drum motor 153: Backwash water pump 154: Biochemical filtration device 155: Biochemical Fan 156: Circulating water dissolved oxygen device 157: Disinfection and sterilization equipment 158: Circulating water pump 159: Aquaculture pond Detailed Implementation

[0019] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this disclosure. However, it will be apparent to those skilled in the art that embodiments of this disclosure may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this disclosure.

[0020] To fully understand the embodiments of this disclosure, a detailed structure will be presented in the following description. It is obvious that the implementation of the embodiments of this disclosure is not limited to the specific details familiar to those skilled in the art.

[0021] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this disclosure. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0022] Ordinal numbers such as “first” and “second” used in this disclosure are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” nor does the term “second component” imply the existence of a “first component.” It should be noted that the terms “upper,” “lower,” “front,” “rear,” “left,” “right,” “inner,” “outer,” and similar expressions used in this disclosure are for illustrative purposes only and are not intended to be limiting.

[0023] The terms “center,” “parallel,” “perpendicular,” “aligned,” and “symmetrical” used in this disclosure are not necessarily precise, but may include typical engineering tolerances.

[0024] Hereinafter, specific embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present disclosure and are not intended to limit the present disclosure.

[0025] In recent years, to address the challenges posed by traditional aquaculture models, such as the depletion of natural resources, environmental pollution, and dependence on natural conditions, recirculating aquaculture systems (RAS) have become increasingly widely adopted. This model supports high-density farming through automated equipment, increasing yields while reducing labor costs and simplifying management processes. However, existing RAS systems still have several technical shortcomings: First, there's the issue of power supply reliability. Current recirculating aquaculture systems primarily employ two power supply modes: one is direct mains power; the other is a dual-power supply system, consisting of one mains power source and one diesel generator. Compared to a single mains power source, the dual-power supply system automatically switches to the diesel generator when the mains power fails, ensuring continuous system operation. However, if both the mains power and the diesel generator fail simultaneously, or if there are issues like leakage or short circuits in the main circuit, the diesel generator will be unable to function, leading to a lack of backup power and system shutdown. In this situation, the following may occur: (1) Water treatment equipment failure: The water treatment equipment cannot operate according to the predetermined logic, which may lead to abnormal water overflow or discharge; (2) Water quality deterioration: Water circulation is interrupted, resulting in an overall decline in water quality and insufficient dissolved oxygen in the aquaculture pond; (3) Monitoring gap: Due to the power outage, it is impossible to monitor key parameters such as the liquid level and dissolved oxygen in the aquaculture pond in real time, which affects timely adjustment and emergency response.

[0026] Secondly, there is the issue of dissolved oxygen supply. Fish metabolism depends on sufficient dissolved oxygen in the water. When the dissolved oxygen content in the water is low, fish will surface for air; under extremely low oxygen conditions, they will suffocate and die. Therefore, if the dissolved oxygen concentration in the aquaculture pond is insufficient and measures are not taken in time, fish will die from oxygen deprivation, resulting in economic losses.

[0027] In conclusion, although recirculating aquaculture systems offer significant advantages, existing systems still face challenges in terms of power supply reliability and dissolved oxygen management. Further optimization is needed to improve system stability and safety, ensuring aquaculture efficiency and economic benefits. For example, introducing multi-level redundant power supply schemes and intelligent dissolved oxygen monitoring and regulation mechanisms can effectively alleviate these problems and enhance the system's resilience.

[0028] To at least partially address the aforementioned problems, this disclosure provides a dissolved oxygen guarantee system for recirculating aquaculture ponds. This recirculating aquaculture pond dissolved oxygen guarantee system aims to solve the problems of unreliable dissolved oxygen levels and unreliable power supply in existing systems. See below. Figures 1 to 12 The example shown provides a detailed description of a recirculating aquaculture pond dissolved oxygen protection system according to this disclosure.

[0029] See Figure 1 The dissolved oxygen supply system 100 for recirculating aquaculture ponds according to this disclosure includes an oxygen source device 101, a pure oxygen aeration and dissolved oxygen device 102, an online dissolved oxygen monitoring device 105, a control device 110, and a backup power supply 130. The pure oxygen aeration and dissolved oxygen device 102 is connected to the oxygen source device 101 and is adapted to be connected to an aquaculture pond 159. The online dissolved oxygen monitoring device 105 is adapted to be installed in the aquaculture pond 159 for monitoring the actual dissolved oxygen level in the water within the aquaculture pond 159. The control device 110 is communicatively connected to the pure oxygen aeration and dissolved oxygen device 102 and the online dissolved oxygen monitoring device 105. The power supply 120 is electrically connected to the pure oxygen aeration and dissolved oxygen device 102, the online dissolved oxygen monitoring device 105, and the control device 110. The backup power supply 130 provides a safe voltage DC power supply. The safe voltage is less than or equal to 24V.

[0030] The control device 110 is configured as follows: The system receives the actual dissolved oxygen level detected by the online dissolved oxygen monitoring device 105 and compares the actual dissolved oxygen level with preset dissolved oxygen range parameters. The dissolved oxygen range parameters include a lower limit and an upper limit. If the actual dissolved oxygen level reaches or falls below the lower limit, the pure oxygen aeration dissolved oxygen device 102 is controlled to be in the on state. If the actual dissolved oxygen level reaches or exceeds the upper limit, the pure oxygen aeration dissolved oxygen device 102 is controlled to be in the off state. When the pure oxygen aeration dissolved oxygen device 102 is in the on state, it enables the oxygen source device 101 to supply oxygen to the aquaculture pond 159. When the pure oxygen aeration dissolved oxygen device 102 is in the off state, it enables the oxygen source device 101 to stop supplying oxygen to the aquaculture pond 159.

[0031] According to the dissolved oxygen supply system 100 for recirculating aquaculture ponds disclosed herein, an online dissolved oxygen monitoring device 105 monitors the actual dissolved oxygen level in the aquaculture pond 159. A control device 110 automatically controls the state of the pure oxygen aeration device 102 when the actual dissolved oxygen level reaches the preset lower and upper limits of the dissolved oxygen range parameters. Specifically, when the actual dissolved oxygen level reaches the lower limit, the control device 110 controls the pure oxygen aeration device 102 to be turned on, thereby supplying oxygen to the aquaculture pond 159 to supplement oxygenation. When the dissolved oxygen level reaches the upper limit, the control device 110 controls the pure oxygen aeration device 102 to be turned off, thus maintaining the actual dissolved oxygen level in the aquaculture pond 159 within a suitable range. By employing the above-mentioned technical means, the dissolved oxygen level in the aquaculture pond 159 can be automatically maintained within a preset range to meet the oxygen requirements of the cultured organisms in the pond 159, thereby helping to prevent aquaculture losses due to oxygen deficiency. Furthermore, by equipping the dissolved oxygen online monitoring device 105, the pure oxygen aeration dissolved oxygen device 102, and the control device 110 with a backup power supply 130, the low-voltage equipment such as the dissolved oxygen online monitoring device 105, the pure oxygen aeration dissolved oxygen device 102, and the control device 110 can operate normally in the event of abnormal power supply to the main circuit 126 or failure of the dissolved oxygen equipment in the main circuit 126, thereby ensuring normal dissolved oxygen levels in the aquaculture pond 159.

[0032] Optionally, the oxygen source device 101 is an oxygen cylinder or an oxygen generator. The oxygen cylinder contains liquefied oxygen.

[0033] In the illustrated example, the dissolved oxygen online monitoring device 105 includes a dissolved oxygen meter 106. The dissolved oxygen meter 106 is used to detect the actual dissolved oxygen level in the aquaculture pond 159. The control device 110 includes an analog input module 113. The analog input module 113 is connected to the dissolved oxygen meter 106 to obtain the actual dissolved oxygen level detected by the dissolved oxygen meter 106.

[0034] See Figure 3 and Figure 4In some embodiments, the recirculating aquaculture pond dissolved oxygen supply system 100 includes a power supply unit 120, a main circuit 126, and a dual-power automatic transfer switch QF3. The power supply unit 120 includes a mains power supply circuit 121 and a backup generator circuit 122. The mains power supply circuit 121 is adapted to be electrically connected to a mains power source. The backup generator circuit 122 is adapted to be electrically connected to a generator. The input terminal of the dual-power automatic transfer switch QF3 is electrically connected to the power supply unit 120. The output terminal of the dual-power automatic transfer switch QF3 is electrically connected to the main circuit 126. The dual-power automatic transfer switch QF3 is configured to automatically switch to the backup generator circuit 122 when the mains power supply circuit 121 is de-energized, and to automatically switch to the mains power supply circuit 121 when the mains power supply circuit 121 is energized. When the dual-power automatic transfer switch QF3 is connected to the mains power supply circuit 121, the main circuit 126 is powered by the mains power source. When the dual power automatic transfer switch QF3 is connected to the backup power generation circuit 122, the main circuit 126 is powered by the power generation equipment.

[0035] It is understandable that the mains power supply circuit 121 and the backup generator circuit 122 are connected in parallel to the dual power automatic transfer switch QF3. The dual power automatic transfer switch QF3 can monitor whether the mains power supply circuit 121 and the backup generator circuit 122 are supplying power normally and automatically switch the power supply path. According to the usual wiring example, the dual power automatic transfer switch QF3 preferentially selects the mains power supply circuit 121 for power supply.

[0036] Automatic transfer switches (ATS) are core devices that ensure continuous power supply to critical loads. They can automatically switch to power generation equipment (such as diesel generators) when the mains power fails and automatically switch back when the mains power is restored.

[0037] The dual-power automatic transfer switch has a primary power input terminal, a backup input terminal, and an output terminal. The primary power input terminal is electrically connected to the mains power supply circuit 121. The backup input terminal is electrically connected to the backup generator circuit 122. The output terminal is electrically connected to the load-side circuit and electrical equipment.

[0038] Taking a diesel generator as an example, the working process of a dual-power automatic transfer switch consists of four stages: Phase 1: Normal mains power supply The dual-power automatic transfer switch detects that the mains voltage and frequency are normal. The switch remains in the "Mains Power Supply" position. The load is powered by mains power. The diesel generator is in standby mode (not running).

[0039] Phase 2: In case of mains power failure, automatically switch to generator. The dual-power automatic transfer switch monitors the mains power in real time. When it detects low or high voltage, phase loss, or complete power outage (lasting longer than the set delay, such as 3-10 seconds), the dual-power automatic transfer switch sends a "start" signal to the AMF controller 111 of the diesel generator. The diesel generator then starts, warms up, and establishes a stable voltage and frequency. When the dual-power automatic transfer switch detects that the generator power supply is qualified (voltage / frequency within the allowable range), it disconnects the mains power side and closes the generator side, and the load is then powered by the generator.

[0040] Phase 3: Mains power restored, automatically switching back to mains power. The dual-power automatic transfer switch continuously monitors the mains power. When the mains power returns to normal and stabilizes for a period of time (lasting longer than the set delay, such as 30 seconds to 5 minutes), it disconnects the generator side and closes the mains side, switching the load back to mains power. Simultaneously, it sends a "shutdown" signal to the diesel generator. The diesel generator then enters the cooling shutdown procedure.

[0041] Phase 4: The system returns to its initial standby state. The load is powered by mains electricity. The generator is off and on standby. The automatic transfer switch continues to monitor the mains power supply, preparing for the next switchover.

[0042] By adopting the above-mentioned technical means, namely the dual-power supply scheme, the system can automatically switch to power supply from the generator after a mains power outage and automatically switch back after the mains power is restored. Compared with the scheme that only uses mains power, this reduces the probability of system downtime or shutdown, thereby ensuring the stability of the power supply to the dissolved oxygen protection system 100 in the recirculating aquaculture pond.

[0043] See Figure 5 Optionally, the dual-power automatic transfer switch is connected to a mains power on indicator light PGG1 and a generator power on indicator light PGG2. When the dual-power automatic transfer switch switches to the mains power supply circuit 121, the mains power on indicator light PGG1 illuminates, and the generator power on indicator light PGG2 goes out. When the dual-power automatic transfer switch switches to the standby generator circuit 122, the mains power on indicator light PGG1 goes out, and the generator power on indicator light PGG2 illuminates.

[0044] exist Figure 5 In the example shown, the dual-power automatic transfer switch has a common port numbered 401, a common port numbered 301, a mains power on / off indicator port numbered 403, and a generator power on / off indicator port numbered 303. The mains power on / off indicator PGG1 is electrically connected between the common port numbered 401 and the mains power on / off indicator port numbered 403. The generator power on / off indicator PGG2 is electrically connected between the common port numbered 301 and the generator power on / off indicator port numbered 303.

[0045] See Figure 3and Figure 6 Optionally, the dissolved oxygen supply system 100 for the recirculating aquaculture pond includes a first intermediate relay KA1. The first intermediate relay KA1 has a normally closed contact and a coil. The coil of the first intermediate relay KA1 is electrically connected to the mains power supply circuit 121. The normally closed contact of the first intermediate relay KA1 is connected to the control device 110. When the mains power is supplied, the coil of the first intermediate relay KA1 is energized, and the normally closed contact of the first intermediate relay KA1 opens. When the mains power is de-energized, the coil of the first intermediate relay KA1 is de-energized, and the normally closed contact of the first intermediate relay KA1 resets. The switch input module 112 of the control device 110 can obtain the state of the normally closed contact of the first intermediate relay KA1, thereby determining whether the mains power is interrupted.

[0046] exist Figure 6 In the example shown, the first intermediate relay KA1 has two normally closed contacts. The two normally closed contacts of the first intermediate relay KA1 are connected in parallel to the control device 110. The two normally closed contacts of the first intermediate relay KA1 are redundantly designed in the circuit to ensure that the control device 110 can reliably monitor the status of the mains power supply circuit 121.

[0047] See Figure 3 , Figure 5 as well as Figure 6 Optionally, the dissolved oxygen supply system 100 for the recirculating aquaculture pond includes a second intermediate relay KA2. The second intermediate relay KA2 has a coil and a normally open contact. The coil of the second intermediate relay KA2 is electrically connected to the aforementioned dual-power automatic transfer switch. The normally open contact of the second intermediate relay KA2 is connected to the control device 110. When the dual-power automatic transfer switch switches to generator power supply mode, the coil of the second intermediate relay KA2 is energized, and the normally open contact of the second intermediate relay KA2 closes. When the dual-power automatic transfer switch switches back to mains power supply, the coil of the second intermediate relay KA2 is de-energized, and the normally open contact of the second intermediate relay KA2 resets. The switch input module 112 of the control device 110 can obtain the state of the normally open contact of the second intermediate relay KA2, thereby determining whether the backup generator circuit 122 is supplying power.

[0048] exist Figure 6 In the example shown, the second intermediate relay KA2 has two normally open contacts. These two normally open contacts of the second intermediate relay KA2 are connected in parallel to the control device 110. The two normally open contacts of the second intermediate relay KA2 are redundantly designed in the circuit to ensure that the control device 110 can reliably monitor the status of the backup power generation circuit 122.

[0049] See Figure 1 ,as well as Figures 10 to 12In some embodiments, the recirculating aquaculture pond dissolved oxygen supply system 100 further includes a control circuit 127. The control circuit 127 is electrically connected to a main circuit 126, a backup power supply 130, and a control device 110. The main circuit 126 supplies power to the control circuit 127. The backup power supply 130 supplies power to the control circuit 127. The control circuit 127 supplies power to the pure oxygen aeration dissolved oxygen device 102 and the dissolved oxygen online monitoring device 105 via the control device 110.

[0050] When the power supply device 120 is available, it supplies power to the control circuit 127 via the main circuit 126. When the power supply device 120, which includes the mains power supply circuit 121 and the backup generator circuit 122, is unable to supply power, the backup power supply 130 continues to supply power to the pure oxygen aeration dissolved oxygen device 102, the dissolved oxygen online monitoring device 105, and the control device 110. During the period when the backup power supply 130 is providing power, the dissolved oxygen online monitoring device 105 can still continue to monitor the actual dissolved oxygen level in the aquaculture pond 159, and the control device 110 can still control the pure oxygen aeration dissolved oxygen device 102 to be in the open state when the actual dissolved oxygen level reaches the lower limit, and control the pure oxygen aeration dissolved oxygen device 102 to be in the closed state when the actual dissolved oxygen level reaches the upper limit.

[0051] By adopting the above-mentioned technical means, the functional requirements of automatically managing the dissolved oxygen in the aquaculture pond 159 and maintaining the actual dissolved oxygen in the aquaculture pond 159 within the preset dissolved oxygen range parameters are guaranteed, thereby preventing or avoiding aquaculture losses caused by oxygen deficiency in the aquaculture pond 159.

[0052] See Figure 1 and Figure 12 In some embodiments, the backup power supply 130 includes an uninterruptible power supply (UPS) and a switching power supply. The UPS is electrically connected to the switching power supply. The switching power supply is configured to convert the electrical energy supplied by the UPS. The UPS is used to store electrical energy and can continuously output AC power. The electrical energy output by the UPS is typically AC 220V. However, electrical equipment such as relays and dissolved oxygen online monitoring devices 105 require, for example, DC 24V power. By setting up the switching power supply, the electrical energy output by the UPS can be converted into the electrical energy required by the corresponding electrical equipment, thereby ensuring normal power supply. In this embodiment, the backup power supply 130 integrates the UPS and the switching power supply, which can provide power when the mains power supply circuit 121 and the backup generator circuit 122 are not working properly, and can also realize the conversion of electrical energy.

[0053] Optionally, the control device 110 is electrically connected as part of the main unit to the backup power supply 130 and the downstream circuit of the dual power transfer switch to obtain, for example, AC 220V power. This control device 110 has internal rectification and voltage regulation circuits to convert it into low-voltage DC power such as 5V, 12V, or 24V, thereby supplying power to the CPU, low-voltage devices, etc.

[0054] It is understood that the uninterruptible power supply and the switching power supply can be two separate devices or integrated into one device. In this disclosure, the backup power supply 130 preferably integrates the uninterruptible power supply and the switching power supply into one device.

[0055] In other embodiments, the backup power supply may also be replaced by batteries or energy storage devices such as lead-acid battery packs or lithium iron phosphate batteries, which can both store electrical energy and provide DC power that meets safe voltage requirements. Those skilled in the art will understand that when using these batteries or energy storage devices as backup power supplies, it is necessary to implement them using power failure detection and switching devices so that these batteries or energy storage devices can automatically intervene and supply power to the control circuit when the main circuit power supply is abnormal.

[0056] See Figure 1 Optionally, the dissolved oxygen online monitoring device 105 includes a dissolved oxygen meter 106. The dissolved oxygen meter 106 is a key instrument for detecting the actual dissolved oxygen level in the aquaculture pond 159. The pure oxygen aeration dissolved oxygen device 102 includes an electric valve. The electric valve has an open state and a closed state. The open state of the electric valve corresponds to the open state of the pure oxygen aeration dissolved oxygen device 102. The closed state of the electric valve corresponds to the closed state of the pure oxygen aeration dissolved oxygen device 102. The dissolved oxygen meter 106 and the electric valve are electrically connected to the output terminal of a switching power supply to supply low-voltage DC power. The electric valve here can be an electric ball valve 104.

[0057] See Figure 3 , Figure 4 , Figure 7 as well as Figure 8 In some embodiments, the recirculating aquaculture pond dissolved oxygen protection system 100 includes a first power failure detection circuit 133 and an alarm 134. The first power failure detection circuit 133 is electrically connected to the main circuit 126. The first power failure detection circuit 133 is communicatively connected to a control device 110. The first power failure detection circuit 133 is used to detect a first power failure signal and a first power-on signal in the main circuit 126. The alarm 134 is electrically connected to a power supply device 120. The alarm 134 is communicatively connected to the control device 110. The control device 110 is also configured to acquire the first power failure signal and control the alarm 134 to operate based on the first power failure signal.

[0058] In application, the main circuit 126 is connected to the power supply line of the power supply device 120 selected by the dual-power automatic transfer switch QF3, and continues to supply power to the electrical equipment in the control circuit 127 and other electrical equipment besides the control circuit 127. The main circuit 126 is used to provide AC power. The AC power provided by the main circuit 126 includes, for example, 380V AC and 220V AC. When the main circuit 126 is powered normally, the control circuit 127 can obtain power from one branch of the main circuit 126 to power the electrical equipment in the control circuit 127. When the main circuit 126 cannot supply power normally, the backup power supply 130 supplies power to the control circuit 127, thereby maintaining the oxygen supply to the aquaculture pond 159. When the main circuit 126 cannot supply power normally, the control device 110 can control the alarm 134 to operate after receiving the first power failure signal, thereby issuing an alarm sound through the alarm 134.

[0059] In this embodiment, by employing the aforementioned technical means, the backup power supply 130 can maintain power supply to the control circuit 127 in the event of a power outage in the main circuit 126, thereby continuing to meet the dissolved oxygen requirements of the aquaculture pond 159 and preventing or avoiding aquaculture losses due to insufficient dissolved oxygen. Furthermore, it can also control the alarm 134 to sound an alarm when the main circuit 126 experiences a power outage, thus facilitating timely troubleshooting. Here, the backup power supply 130 serves as an emergency power supply when the main circuit 126 experiences a power outage. After the main circuit 126 resumes power supply, it continues to primarily supply power.

[0060] exist Figure 8 and Figure 9 In the example shown, the main circuit 126 includes the coil of the third intermediate relay KA3. The normally open contact of the third intermediate relay KA3 is connected to the digital input module 112 of the control device 110. When the main circuit 126 is energized, the coil of the third intermediate relay KA3 is energized, causing the normally open contact of the third intermediate relay KA3 to close. When the main circuit is de-energized or cannot supply power normally, the coil of the third intermediate relay KA3 is de-energized, causing the normally open contact of the third intermediate relay KA3 to reset. The first power-off signal is generated when the normally open contact of the third intermediate relay KA3 resets or switches from a closed state to an open state.

[0061] See Figure 11 Furthermore, the alarm 134 is also connected to the analog input module 113 of the control device 110. The control device 110 can monitor the status of the alarm 134 in real time.

[0062] See Figure 1 , Figure 11 as well as Figure 12In some embodiments, the electrical equipment in control loop 127 also includes a display device. The display device is communicatively connected to control device 110. After receiving a first power failure signal, control device 110 can display system power failure alarm information on the display device to remind people to handle the situation. By setting up a display device, the alarm information can be displayed more intuitively, so that troubleshooting personnel can obtain more information about the fault, which helps to improve troubleshooting efficiency.

[0063] Optionally, the display device is configured to also display the on / off status of the pure oxygen aeration dissolved oxygen device 102, as well as information such as the actual dissolved oxygen content detected by the dissolved oxygen online monitoring device 105.

[0064] Continue reading Figure 1 , Figure 11 as well as Figure 12 Optionally, the display device is a touch screen 115. In addition to its display function, the touch screen 115 can also function as an input device to set system parameters. These system parameters include the dissolved oxygen range parameters mentioned above. In the illustrated example, the touch screen 115 is communicatively connected to the analog input module 113 of the control device 110, allowing the user to input information to the control device 110 via the touch screen 115.

[0065] See Figure 12 In some embodiments, control circuit 127 includes a first control branch circuit 135, a second control branch circuit 136, and a third control branch circuit 137. The first control branch circuit 135 includes a control device 110 and a first fuse FU1. The control device 110 is electrically connected to a backup power supply 130 via the first fuse FU1. The second control branch circuit 136 includes a pure oxygen aeration dissolved oxygen device 102 and a second fuse FU4. The pure oxygen aeration dissolved oxygen device 102 is electrically connected to the backup power supply 130 via the second fuse FU4. The third control branch circuit 137 includes an online dissolved oxygen monitoring device 105 and a third fuse FU2. The online dissolved oxygen monitoring device 105 is electrically connected to the backup power supply 130 via the third fuse FU2.

[0066] When an overload or short circuit occurs in the first control branch circuit 135, the first fuse FU1 blows, disconnecting the first control branch circuit 135. The control device 110 is then in a state of no power supply and cannot operate. When an overload or short circuit occurs in the second control branch circuit 136, the second fuse FU4 blows, disconnecting the second control branch circuit 136. The pure oxygen aeration dissolved oxygen device 102 is then in a state of no power supply and does not operate. When an overload or short circuit occurs in the third control branch circuit 137, the third fuse FU2 blows, disconnecting the third control branch circuit 137. The dissolved oxygen online monitoring device 105 is then in a state of no power supply and does not operate.

[0067] In this embodiment, by equipping each of these devices with a fuse, even if a device is overloaded or short-circuited, only the fuse corresponding to that device will be automatically disconnected, and the other devices will continue to operate normally without being affected.

[0068] exist Figure 12 In the example shown, control circuit 127 also includes a fourth intermediate relay KA4, a fifth intermediate relay KA5, and a sixth intermediate relay KA6. The fourth intermediate relay KA4 includes a coil, a normally closed contact, and a normally closed contact. The coil of the fourth intermediate relay KA4 is electrically connected between the control device 110's switch output module 114 and the DC 24V power supply. The fifth intermediate relay KA5 includes a coil, a normally closed contact, and a normally closed contact. The coil of the fifth intermediate relay KA5 is electrically connected between the control device 110's switch output module 114 and the DC 24V power supply. The sixth intermediate relay KA6 includes a coil, a normally closed contact, and a normally closed contact. The coil of the sixth intermediate relay KA6 is electrically connected between the control device 110's switch output module 114 and the main circuit 126, and between the control device 110's switch output module 114 and the AC power output terminal of the backup power supply 130.

[0069] The pure oxygen aeration and dissolved oxygen device 102 includes an electric ball valve 104. The second control branch circuit 136 includes a valve opening branch and a valve closing branch. The valve opening branch and the valve closing branch are connected in parallel. In the valve opening branch, the normally closed contact of the fourth intermediate relay KA4 and the normally open contact of the fifth intermediate relay KA5 are connected in series. In the valve closing branch, the normally closed contact of the fifth intermediate relay KA5 and the normally open contact of the sixth intermediate relay KA6 are connected in series.

[0070] When the electric ball valve 104 is opened, the switch output module 114 of the control device 110 outputs a valve opening signal, which de-energizes the coil of the fourth intermediate relay KA4, energizes the coil of the fifth intermediate relay KA5, and de-energizes the coil of the sixth intermediate relay KA6. This causes the normally closed contact of the fourth intermediate relay KA4 to close, the normally open contact of the fifth intermediate relay KA5 to close, and the normally open contact of the sixth intermediate relay KA6 to open, thus switching the electric ball valve 104 to the open state.

[0071] When the electric ball valve 104 is closed, the switch output module 114 of the control device 110 outputs a valve closing signal, which de-energizes the coil of the fourth intermediate relay KA4, de-energizes the coil of the fifth intermediate relay KA5, and energizes the coil of the sixth intermediate relay KA6. This causes the normally closed contact of the fourth intermediate relay KA4 to close, the normally open contact of the fifth intermediate relay KA5 to open, and the normally open contact of the sixth intermediate relay KA6 to close, thus switching the electric ball valve 104 to the closed state.

[0072] See Figure 12 In some embodiments, where the control circuit 127 includes the aforementioned touchscreen 115, the control circuit 127 further includes a fourth control branch circuit 139. The fourth control branch circuit 139 includes the touchscreen 115 and a fourth fuse. The touchscreen 115 is electrically connected to the backup power supply 130 via the fourth fuse. In the event of an overload or short circuit in the fourth control branch circuit 139, the fourth fuse blows, disconnecting the fourth control branch circuit 139, and the touchscreen 115 is in a state of being unpowered; at this time, the touchscreen 115 does not operate.

[0073] Optionally, the dissolved oxygen online monitoring device 105 includes a dissolved oxygen meter 106. Figure 12 In the example shown, the third control circuit 137, where the dissolved oxygen meter 106 is located, and the fourth control circuit 139, where the touch screen 115 is located, share a single fuse FU2.

[0074] See Figure 12 In some embodiments, the alarm 134 described above is also electrically connected to the backup power supply 130 via a fifth fuse FU3.

[0075] See Figure 3 In some embodiments, the power supply device 120 includes a second power failure detection circuit 138. The second power failure detection circuit 138 is electrically connected to the mains power supply circuit 121 and communicatively connected to the control device 110. The second power failure detection circuit 138 is used to detect a second power failure signal and a second power-on signal of the mains power supply circuit 121.

[0076] The control device 110 is also configured to: Upon receiving the first power-on signal and the second power-off signal, the system controls the operation to run in energy-saving mode.

[0077] In energy-saving mode, the control device 110 controls the electrical equipment in the system to operate in a low-power state. For example, it reduces the operating power or speed of the equipment, reduces the number of equipment start-ups and shutdowns or extends downtime, optimizes the operating sequence, and shuts down unnecessary loads.

[0078] Since the mains power supply circuit 121 malfunctions and the backup power generation circuit 122 is used for power supply, and the power supplied by the backup power generation circuit 122 is usually limited in duration, controlling the electrical equipment in the system to operate in energy-saving mode before the mains power is restored can reduce the system's power consumption, thereby extending the usage time of the power supplied by the backup power generation circuit 122. This helps prevent system shutdown before the mains power is restored, or shortens the downtime. By adopting the above technical means, the control device 110 can automatically determine whether the mains power supply circuit 121 is de-energized and whether the backup power generation circuit 122 can supply power based on the first power-on signal and the second power-off signal. When the mains power supply circuit 121 is de-energized and the backup power generation circuit 122 can supply power, the control system operates in energy-saving mode. This helps prevent the system from continuing to operate at normal power consumption without timely notification that the mains power supply circuit 121 is disconnected.

[0079] See Figure 1 , Figure 7 as well as Figure 8 In some embodiments, the recirculating aquaculture pond dissolved oxygen protection system 100 further includes a recirculating water treatment device 150. The recirculating water treatment device 150 is adapted to be connected to the aquaculture pond 159 via piping. The recirculating water treatment device 150 is electrically connected to a power supply device 120. The recirculating water treatment device 150 is communicatively connected to a control device 110. The control device 110 is also configured to control the recirculating water treatment device 150 to drive the water circulation in the aquaculture pond 159 and to treat the water in the aquaculture pond 159.

[0080] By employing the aforementioned technical methods, the water in the aquaculture pond 159 can be circulated, and the water quality can be treated during the circulation process. This helps prevent aquaculture losses caused by water quality deterioration in the aquaculture pond 159.

[0081] See Figure 1 Furthermore, the circulating water treatment equipment 150 includes a physical filtration device 151, a biological filtration device 154, a circulating water dissolved oxygen device 156, a disinfection device 157, and a circulating water pump 158 connected in sequence. The physical filtration device 151 is adapted to be connected to an aquaculture pond 159. The circulating water pump 158 is adapted to be connected to the aquaculture pond 159. The physical filtration device 151, the biological filtration device 154, the disinfection device 157, the circulating water dissolved oxygen device 156, and the circulating water pump 158 are electrically connected to a power supply device 120. The physical filtration device 151, the biological filtration device 154, the disinfection device 157, the circulating water dissolved oxygen device 156, and the circulating water pump 158 are communicatively connected to a control device 110. The control device 110 is also configured to control the status of the physical filtration device 151, the biological filtration device 154, the disinfection device 157, the circulating water dissolved oxygen device 156, and the circulating water pump 158.

[0082] In application, the physical filtration device 151 is used to quickly remove large particulate impurities such as suspended solids, uneaten food, and feces from the water, reducing turbidity and lessening the load on subsequent biological treatment. The working principle of the physical filtration device 151 is as follows: water first enters a sedimentation or filter bed, where gravity, centrifugation, or a filter screen traps solids, and then it enters a microfiltration machine for more refined retention. The filtered water enters the next treatment stage, while the solids are discharged through a sewage system to prevent secondary pollution. The biological filtration device 154 uses nitrifying bacteria to convert ammonia nitrogen (NH3N) into nitrite (NO2N) and then into nitrate (NO3N), or further performs denitrification, reducing the nitrogen load on the water and maintaining water quality stability. The working principle of the biological filtration device 154 is as follows: after physical filtration, water enters a biological filter bed where nitrifying bacteria are already cultured on the surface of the packing material. Ammonia nitrogen is oxidized to nitrate by the bacteria, and then further removed in subsequent denitrification or plant absorption stages. The design of the biological filter bed must ensure sufficient aeration / dissolved oxygen to maintain bacterial activity. The disinfection device 157 is used to inhibit the reproduction of pathogenic microorganisms and algae, prevent the spread of diseases, and ensure the health of farmed animals. The disinfection device 157 works as follows: before entering the aquaculture pond 159, water passes through a disinfection unit, where UV or ozone devices sterilize it in a short time, and then it enters the oxygenation stage or is directly returned. The disinfection device 157 is usually linked with a flow meter and automatic control valves to achieve on-demand disinfection. The circulating water pump 158 provides forced circulation of water between the aquaculture pond 159 and each treatment unit, ensuring uniform water flow and high treatment efficiency. The circulating water dissolved oxygen device 156 is used to maintain dissolved oxygen (DO) in the water to meet the respiratory needs of aquatic animals and provide oxygen for nitrifying bacteria. The control device 110 monitors the dissolved oxygen in the water in real time through a dissolved oxygen meter 106 or a dissolved oxygen sensor and automatically adjusts it. Typically, the oxygenation device is only activated when the dissolved oxygen in the water falls below a set threshold, saving energy.

[0083] Optionally, the physical filtration device 151 may be equipped with a microfilter or a fixed bed, etc. The microfilter includes a drum motor 152 and a backwash water pump 153, such as... Figure 7 As shown.

[0084] Optionally, the biological filtration device 154 is equipped with an MBBR tank or fluidized bed, and should include a biological blower 155, such as... Figure 8 As shown.

[0085] Optionally, the circulating water oxygenation device 156 can be an oxygenation cone, a medium-pressure oxygenation device, a low-pressure oxygenation device, etc.

[0086] The circulating water treatment equipment 150 here can be a corresponding device from the existing technology.

[0087] Optionally, the circulating water treatment device 150 is connected to the main circuit 126. It is powered by a mains power supply circuit 121 and a backup generator circuit 122. The circulating water treatment device 150 is not electrically connected to the backup power supply 130. In the event of a power outage in the main circuit 126, the circulating water treatment device 150 shuts down.

[0088] According to the recirculating aquaculture pond dissolved oxygen guarantee system 100 disclosed herein, in terms of system oxygen supply, when the oxygen supply of the circulating water is insufficient, the pure oxygen aeration dissolved oxygen device 102 can provide additional oxygen to the aquaculture pond 159, achieving dual guarantee of dissolved oxygen in the aquaculture pond 159. The pure oxygen aeration dissolved oxygen device 102 includes a pure oxygen aeration pipe and an electric ball valve 104, which is connected to the oxygen source device 101. The working principle of the pure oxygen aeration dissolved oxygen device 102 is as follows: the dissolved oxygen meter 106 in the aquaculture pond 159 communicates with the controller 111 in the control cabinet 116. The dissolved oxygen meter 106 is responsible for collecting dissolved oxygen data in the aquaculture pond 159. The controller 111 monitors the dissolved oxygen meter 106 in real time and acquires the dissolved oxygen data, and compares the dissolved oxygen data with the dissolved oxygen threshold range set by the controller 111 program. When the dissolved oxygen content in the aquaculture pond 159 is lower than the lower limit of the dissolved oxygen threshold range, the controller 111 outputs a signal to control the electric ball valve 104 to open, and pure oxygen from the oxygen source device 101 will be transported to the aquaculture pond 159 through the pure oxygen aeration pipe at the bottom of the aquaculture pond 159. When the dissolved oxygen content in the aquaculture pond 159 rises and exceeds the upper limit of the dissolved oxygen threshold range, the controller 111 will output a signal to control the electric ball valve 104 to close. Under normal circumstances, the circulating water dissolved oxygen device 156 in the system relies on the normal operation of the water treatment equipment in the circulating water treatment equipment 150 to add oxygen to the circulating water, thereby supplementing the dissolved oxygen in the aquaculture pond 159. This is the main way for the aquaculture pond 159 to maintain the dissolved oxygen level. The circulating water dissolved oxygen device 156 can be a dissolved oxygen cone or a medium-pressure dissolved oxygen device, etc. The circulating water treatment equipment 150 includes at least physical filtration, biological filtration, circulating water pump 158, disinfection device 157, and circulating water dissolved oxygen device 156. During system operation, the controller 111 continuously collects dissolved oxygen data from the aquaculture pond 159. When the oxygen consumption in the aquaculture pond 159 is too high, resulting in insufficient dissolved oxygen supply in the circulating water, or when the circulating water treatment equipment 150 malfunctions, causing the circulating water dissolved oxygen device 156 to fail and unable to supply oxygen normally, the controller 111 will trigger the electric ball valve 104 in the pure oxygen aeration dissolved oxygen device 102 to open, supplying oxygen to the aquaculture pond 159 and maintaining the dissolved oxygen content within a suitable range.

[0089] See below for further information. Figures 1 to 12 The example further illustrates the dissolved oxygen protection system 100 for recirculating aquaculture ponds disclosed herein.

[0090] The recirculating aquaculture pond dissolved oxygen supply system 100 includes a control cabinet 116 and a power supply unit 120. The control cabinet 116 is electrically connected to the power supply unit 120. The control cabinet 116 contains a control device 110, a main circuit 126, and a control circuit 127. The main circuit 126 is electrically connected to the power supply unit 120 and the control circuit 127. The control cabinet 116 is externally connected to an alarm 134 and the electrical equipment in the recirculating water treatment equipment 150, the pure oxygen aeration dissolved oxygen device 102, and the dissolved oxygen online monitoring device 105. The control device 110 includes a controller 111 and a touch screen 115. The controller 111 is a control device containing a PLC control chip. The electrical equipment in the recirculating water treatment equipment 150 is powered by the main circuit 126. The electrical equipment in the pure oxygen aeration dissolved oxygen device 102, the dissolved oxygen online monitoring device 105, and the control device 110 are powered by a branch of the main circuit 126 and the control circuit 127. The electrical equipment in the circulating water treatment equipment 150 and the pure oxygen aeration dissolved oxygen device 102 is controlled to start and stop via the controller 111. The controller 111 controls the start and stop of the electrical equipment according to the set logic. At the same time, the controller 111 also communicates with the dissolved oxygen online monitoring device 105 to collect data on dissolved oxygen in the water. The touch screen 115 communicates with the controller 111 and can display the equipment operating status, water quality data of the aquaculture pond 159, equipment fault information, etc., and can also control the electrical equipment in real time through the touch screen 115. The alarm 134 is controlled by the controller 111. When the system experiences equipment failure, data abnormality, or power failure of the main circuit 126, the controller 111 controls the alarm 134 to sound an alarm and simultaneously displays the alarm information on the touch screen 115. The dissolved oxygen online monitoring device 105 includes a dissolved oxygen meter 106. The dissolved oxygen meter 106 is specifically powered by the control circuit 127 connected to the main circuit 126. A dissolved oxygen meter 106 is installed inside the aquaculture pond 159 and collects dissolved oxygen and water temperature data in real time. The dissolved oxygen meter 106 communicates with the controller 111, transmitting the dissolved oxygen and temperature values ​​of the aquaculture pond 159 to the controller 111 in real time. The pure oxygen aeration dissolved oxygen device 102 includes a pure oxygen aeration component 103 and an electric ball valve 104. The pure oxygen aeration component 103 is evenly distributed around the bottom side of the aquaculture pond 159. The pure oxygen aeration component 103, the electric ball valve 104, and the oxygen source device 101 are connected by pipelines. Normally, the electric ball valve 104 is in the closed state. When the electric ball valve 104 is opened, pure oxygen from the oxygen source device 101 can be delivered to the aquaculture pond 159 through the pure oxygen aeration component 103. The pure oxygen aeration component 103 can be a pure oxygen nano-aeration pipe or a nano-aeration plate, etc. The electric ball valve 104 is one form of the aforementioned electric valve. Other electrically controllable valves besides the electric ball valve 104 can also be selected as electric valves.

[0091] The working logic of the pure oxygen aeration dissolved oxygen device 102 is as follows: The dissolved oxygen meter 106 in the aquaculture pond 159 communicates with the controller 111 in the control cabinet 116. The dissolved oxygen meter 106 is responsible for collecting dissolved oxygen data in the aquaculture pond 159. The controller 111 monitors the dissolved oxygen meter 106 in real time and acquires the dissolved oxygen data, comparing the dissolved oxygen data with the dissolved oxygen range parameters set in the controller 111 program. When the dissolved oxygen content in the aquaculture pond 159 is lower than the lower limit of the dissolved oxygen range parameters, the controller 111 outputs a signal to control the electric ball valve 104 to open, and pure oxygen from the oxygen source device 101 will be transported to the aquaculture pond 159 through the pure oxygen aeration pipe at the bottom of the aquaculture pond 159. When the dissolved oxygen content in the aquaculture pond 159 rises and exceeds the upper limit of the dissolved oxygen range parameters, the controller 111 will output a signal to control the electric ball valve 104 to close.

[0092] This disclosure provides dual protection for dissolved oxygen supply. In addition to the circulating water treatment equipment 150 equipped with a circulating water dissolved oxygen device 156 to supply oxygen to the aquaculture pond 159, it also includes an online dissolved oxygen monitoring device 105 and a pure oxygen aeration dissolved oxygen device 102. This is crucial for ensuring the dissolved oxygen content of the aquaculture pond 159. During normal system operation, if the dissolved oxygen provided by the circulating water dissolved oxygen device 156 in the circulating water treatment equipment 150 is insufficient, the pure oxygen aeration dissolved oxygen device 102 can supplement the dissolved oxygen in the aquaculture pond 159. In case of system malfunction, where the circulating water treatment equipment 150 and the circulating water dissolved oxygen device 156 fail, the pure oxygen aeration dissolved oxygen device 102 will continue to supply oxygen to the aquaculture pond 159 according to its own operating logic under the control of the control device 110. In summary, under all circumstances, the pure oxygen aeration dissolved oxygen device 102 can ensure that the dissolved oxygen content in the aquaculture pond 159 remains within a suitable range.

[0093] Power supply unit 120 supplies power to the main circuit 126 and control circuit 127 of control cabinet 116. Power supply unit 120 directly supplies power to the main circuit 126. Power supply unit 120 indirectly supplies power to control circuit 127. The main circuit 126 uses a dual-power supply method. Mains power is the primary power source. A diesel generator serves as the backup power source. The two power sources are switched via a dual-power automatic transfer switch QF3. When the mains power fails, the diesel generator automatically starts to supply power. The main circuit 126 provides power to all electrical equipment in the system. The main power supply range of the main circuit 126 is: control circuit 127 and actuators. Actuators include frequency converter VVVF, drum motor 152, backwash water pump 153, circulating water pump 158, biochemical fan 155, disinfection device 157, DIN rail socket XS1, cabinet exhaust fan FAN1, etc. The main circuit 126 can automatically switch between main and backup power via the dual-power automatic transfer switch QF3, eliminating the need for manual operation, reducing labor costs, and mitigating the risk of electric shock due to misoperation. The drum motor 152 and backwash water pump 153 are components of the microfiltration unit. The cabinet exhaust fan FAN1 is connected in series with the thermostat T1. When the temperature reaches the threshold of the thermostat T1, the thermostat T1 connects the power supply line to the cabinet exhaust fan, causing the exhaust fan FAN1 to operate. In addition, the main circuit 126 is also equipped with a power meter for monitoring electricity consumption and a surge protector for protecting the circuit. The power meter is communicatively connected to the controller 111, which can acquire the electricity consumption data monitored by the meter.

[0094] In the illustrated example, the mains power supply circuit 121 includes a mains power circuit breaker QF0. The mains power supply circuit 121 is electrically connected to the first surge protector FC1 via the first circuit breaker QF1. The mains power supply circuit 121 is also electrically connected to a three-phase four-wire multi-function transformer meter PJ1. The standby generator circuit 122 includes a generator main circuit breaker QF2. The main circuit 126 is electrically connected to the surge protector via the fourth circuit breaker QF4. A branch main circuit 128 is branched off from the main circuit 126 via the fifth circuit breaker QF5. This branch main circuit 128 is electrically connected to the third surge protector FC3 via the seventh circuit breaker QF7. The drum motor 152 is electrically connected to the main circuit branch 128 via the frequency converter VVVF and the eighth circuit breaker QF8. The backwash water pump 153 is electrically connected to the main circuit branch 128 via the main contacts of the first contactor KM1 and the first motor start protector FM1. The circulating water pump 158 is electrically connected to the main circuit branch 128 via the main contacts of the second contactor KM2 and the second motor starter FM2. The biochemical fan 155 is electrically connected to the main circuit branch 128 via the main contacts of the third contactor KM3 and the third motor starter FM3. The disinfection device 157 here is an ultraviolet disinfection device. The disinfection device 157 is electrically connected to the main circuit branch 128 via the main contacts of the fourth contactor KM4 and the ninth circuit breaker QF9. The fault signal output port QF9-AL of the ninth circuit breaker QF9 is connected to the controller 111. The control circuit 127 is electrically connected to the main circuit branch 128 via the tenth circuit breaker QF10. The rail socket is electrically connected to the main circuit branch 128 via the eleventh circuit breaker QF11. The electrical cabinet exhaust fan is connected in parallel with the rail socket.

[0095] like Figure 8 , Figure 10 as well as Figure 12As shown, control circuit 127 is powered by the main circuit branch 128 of the main circuit 126. Often, power outages in the system's control cabinet 116 are not caused by mains power failures, but by leakage or short circuits in the main circuit 126, rendering the diesel generator ineffective. Therefore, simply using dual power supply to the main circuit 126 is insufficient to guarantee stable power supply and dissolved oxygen levels in the aquaculture pond 159. Therefore, this disclosure, in addition to dual power supply to the main circuit 126, also equips control circuit 127 with a backup power supply 130. The backup power supply 130 has uninterrupted power supply and energy conversion functions to continuously provide DC power not exceeding 24V. The main power supply components of control circuit 127 include controller 111, touchscreen 115, alarm 134, dissolved oxygen meter 106, electric ball valve 104, and contactors and relays for controlling the start and stop of the equipment. This disclosure adds a backup power supply 130 to the control loop 127, which, in conjunction with the pure oxygen aeration and dissolved oxygen device 102, ensures that regardless of whether the main loop 126 power supply failure causes all equipment in the system to stop operating and cannot supply oxygen normally, or whether the dissolved oxygen in the aquaculture pond 159 is abnormal due to the failure of the circulating water dissolved oxygen device 156, the pure oxygen aeration and dissolved oxygen device 102 can still operate normally, ensuring normal dissolved oxygen in the aquaculture pond 159 and providing basic life support for the organisms in the aquaculture pond 159. The controller 111 will continuously communicate with the dissolved oxygen meter 106 to obtain the dissolved oxygen value in the aquaculture pond 159 in real time. Once low dissolved oxygen occurs, it will control the electric ball valve 104 to open, supplying pure oxygen to the aquaculture pond 159 through the pure oxygen aeration pipe on the bottom side of the aquaculture pond 159. When the dissolved oxygen level rises back to the upper limit of the dissolved oxygen range parameter, the electric ball valve 104 will close, stopping the oxygen supply. In this situation, even if people do not deal with it in time, it will not lead to a large-scale death of fish and cause losses. Furthermore, if the controller 111 detects a power failure in the main circuit 126, it will trigger the alarm 134 and display the system power failure alarm information on the touch screen 115 to remind people to handle the situation.

[0096] See Figure 12The backup power supply 130 includes an uninterruptible power supply (UPS) and a switching power supply. The UPS converts 220V AC to 24V DC via a 24V switching power supply, powering the controller 111, touchscreen 115, alarm 134, dissolved oxygen meter 106, and electric ball valve 104 in the system. These devices are crucial for ensuring dissolved oxygen in the aquaculture pond 159, as mentioned above. Since the number and power consumption of the devices powered by the UPS are small, the rated power of the UPS can be low, reducing costs. The limited power of these 24V DC devices prevents overcurrent from tripping the main circuit 126. Furthermore, the 24V switching power supply typically has built-in overcurrent and short-circuit protection circuits, preventing UPS failure due to overcurrent or short circuits, thus ensuring continuous and stable operation. Furthermore, each of these devices is equipped with a fuse. Even if a device is overloaded or short-circuited, only the fuse corresponding to that device will be automatically tripped, while other devices will continue to operate normally without being affected.

[0097] See Figures 9 to 12Next, let's examine the controller 111 and its surrounding circuits. The switch input module 112 of the controller 111 is electrically connected to the normally open contact of the first contactor KM1, the overload monitoring contact of the first motor starter FM1, the normally open contact of the second contactor KM2, the overload monitoring contact of the second motor starter FM2, the normally open contact of the third contactor KM3, the overload monitoring contact of the third motor starter FM3, the normally open contact of the fourth contactor KM4, the fault detection port of the disinfection device 157, and the fault monitoring port of the frequency converter. The switch output module 114 of the controller 111 is electrically connected to the main circuit branch 128 through the coil of the first contactor KM1. The switch output module 114 of the controller 111 is electrically connected to the main circuit branch 128 through the coil of the second contactor KM2. The switch output module 114 of the controller 111 is electrically connected to the main circuit branch 128 through the coil of the third contactor KM3. The digital output module 114 of controller 111 is electrically connected to the main circuit branch 128 via the coil of the fourth contactor KM4. The digital output module 114 of controller 111 is also electrically connected to the main circuit branch 128 via the coil of the sixth intermediate relay KA6. The digital output module 114 of controller 111 is also electrically connected to the output terminal of the switching power supply via the coil of the fourth intermediate relay KA4. The digital output module 114 of controller 111 is also electrically connected to the output terminal of the switching power supply via the coil of the fifth intermediate relay KA5. The analog input module 113 of controller 111 is connected to the touchscreen 115, the meter, the dissolved oxygen meter 106, and the alarm 134. The downstream circuit connected to the switching power supply includes a valve opening branch and a valve closing branch. These branches are connected in parallel. The electric valves of the pure oxygen aeration dissolved oxygen device 102 are electrically connected to the switching power supply via both the valve opening and valve closing branches. In the valve opening branch, the normally closed contact of the fourth intermediate relay KA4 and the normally open contact of the fifth intermediate relay KA5 are connected in series. In the valve closing branch, the normally closed contact of the fifth intermediate relay KA5 and the normally open contact of the sixth intermediate relay KA6 are connected in series.

[0098] With each circuit breaker switched to the circuit-connected position and the main circuit power supply normal, the controller 111 outputs control signals to the switch output module 114 according to the preset control logic, energizing the coils of the first contactor KM1, the second contactor KM2, the third contactor KM3, and the fourth contactor KM4, respectively. When the coil of the first contactor KM1 is energized, the main contacts and normally open contacts of the first contactor KM1 close, the main circuit supplies power to the backwash water pump 153, the backwash water pump 153 starts and runs, and the controller 111 receives the running signal fed back by the backwash water pump 153. The overload monitoring contact of the first motor starter FM1 feeds back a fault signal of the backwash water pump 153 when the backwash water pump 153 fails. When the coil of the second contactor KM2 is energized, the main contacts and normally open contacts of the second contactor KM2 close, the main circuit supplies power to the circulating water pump 158, the circulating water pump 158 starts and runs, and the controller 111 acquires the operating signal fed back by the circulating water pump 158. The overload monitoring contact of the second motor starter FM2 feeds back a fault signal from the circulating water pump 158 when it fails. When the coil of the third contactor KM3 is energized, the main contacts and normally open contacts of the third contactor KM3 close, the main circuit supplies power to the biochemical fan 155, the biochemical fan 155 starts and runs, and the controller 111 acquires the operating signal fed back by the biochemical fan 155. The overload monitoring contact of the third motor starter FM3 feeds back a fault signal from the biochemical fan 155 when it fails. When the coil of the fourth contactor KM4 is energized, the main contacts and normally open contacts of the fourth contactor KM4 close, the main circuit supplies power to the disinfection device 157, the disinfection device 157 starts and runs, and the controller 111 receives the operating signal fed back by the disinfection device 157. The ninth circuit breaker QF9 is connected to the switch input module 112 of the controller 111, and feeds back a fault signal when the disinfection device 157 malfunctions. When the switch output module 114 of the control device 110 outputs a valve open signal, the coil of the fifth intermediate relay KA5 is energized, thereby closing the normally open contact and opening the normally closed contact of the fifth intermediate relay KA5, and the electric valve switches to the open state. When the switch output module 114 of the control device 110 outputs a valve close signal, the coil of the sixth intermediate relay KA6 is energized, thereby closing the normally open contact of the sixth intermediate relay KA6, and the electric valve switches to the closed state. Regarding the control of the drum motor 152, the controller 111 is communicatively connected to the frequency converter, and indirectly controls the speed and start / stop of the drum motor 152 by controlling the frequency converter.

[0099] In the event of a main circuit power failure, the controller 111, touchscreen 115, dissolved oxygen meter 106, alarm 134, and electric ball valve 104 can obtain uninterrupted power from the output of the switching power supply, thereby enabling dissolved oxygen monitoring and oxygenation functions to maintain the dissolved oxygen requirements of the aquaculture pond 159 for a certain period of time. The touchscreen 115 and alarm 134 are used to display alarm information to facilitate accurate troubleshooting and to ascertain the current status of the aquaculture pond 159.

[0100] In some application scenarios, the dissolved oxygen protection system 100 for recirculating aquaculture ponds includes power generation equipment and aquaculture ponds 159.

[0101] Compared with the prior art, this disclosure has the following advantages and effective effects: (1) This disclosure provides dual protection for oxygen supply. The circulating water dissolved oxygen device 156 in the system relies on the normal operation of the water treatment equipment in the circulating water treatment module to add oxygen to the circulating water, thereby supplementing dissolved oxygen for the aquaculture pond 159. This is the main way for the aquaculture pond 159 to maintain dissolved oxygen levels. In addition, an online dissolved oxygen monitoring module and a pure oxygen aeration dissolved oxygen module are also provided as the final guarantee for maintaining dissolved oxygen content in the aquaculture pond 159. During system operation, the controller 111 continuously collects dissolved oxygen data from the aquaculture pond 159. When the oxygen consumption in the aquaculture pond 159 is too high or the dissolved oxygen supply in the circulating water is insufficient, the controller 111 will open the electric ball valve 104 in the pure oxygen aeration dissolved oxygen module to supply oxygen to the aquaculture pond 159. When the controller 111 detects that the oxygen content in the aquaculture pond 159 has returned to the normal range, it will control the electric ball valve 104 to close, and the circulating water dissolved oxygen module will continue to supply oxygen independently. This ensures that the oxygen content in the 159 aquaculture pond remains within a range suitable for fish growth, which is beneficial for the healthy growth of the fish and avoids waste caused by excessive oxygenation.

[0102] (2) The dissolved oxygen guarantee provided by this disclosure is not limited to the normal operation of each module of the system. Even if the main circuit 126 of the control cabinet 116 loses power, causing the circulating water dissolved oxygen module to fail, or if the circulating water treatment equipment malfunctions, causing the circulating water dissolved oxygen device 156 to malfunction and fail to supply oxygen to the aquaculture pond 159, the dissolved oxygen online monitoring module and the pure oxygen aeration dissolved oxygen module can still continue to operate, maintaining the dissolved oxygen in the aquaculture pond 159 within a suitable range. To achieve this effect, the power supply scheme in this disclosure also has corresponding triple protection.

[0103] (3) The main circuit 126 of the control cabinet 116 of this disclosure adopts a dual power supply scheme (one mains power + one diesel generator). After the mains power fails, it automatically switches to diesel generator power supply. The switching process does not require manual operation, which improves safety and reduces labor costs.

[0104] (4) The control circuit 127 of the control cabinet 116 is powered by a branch of the main circuit 126. Often, when the system control cabinet 116 loses power, it is not due to a mains power outage, but rather due to leakage or short circuit in the main circuit 126. In such cases, the diesel generator cannot function. Therefore, relying solely on the dual power supply of the main circuit 126 is insufficient to guarantee the stability of the system's power supply and the dissolved oxygen level in the aquaculture pond 159. Therefore, this disclosure, in addition to the dual power supply of the main circuit 126, also equips the control circuit 127 with a backup power supply 130. After the main circuit 126 loses power, the uninterruptible power supply inside the backup power supply 130 automatically activates, providing power to the relevant equipment in the system that ensures dissolved oxygen levels, namely the controller 111, touchscreen 115, alarm 134, dissolved oxygen meter 106, and electric ball valve 104. In this situation, even if people do not respond promptly, it will not lead to a large-scale fish mortality and losses.

[0105] (5) The backup power supply 130 supplies power only to the controller 111, touch screen 115, alarm 134, dissolved oxygen meter 106, and electric ball valve 104. Because the number of devices is small and the power consumption is low, the power requirements for the backup power supply 130 can be reduced. Compared to existing recirculating aquaculture systems, the equipment investment cost is not significantly different, but the reliability is much higher, and manual operation is reduced, lowering labor costs.

[0106] (6) The DC 24V devices, including controller 111, touch screen 115, alarm 134, dissolved oxygen meter 106, and electric ball valve 104, have limited power, so overcurrent will not cause the main circuit 126 to trip. Furthermore, because the 24V switching power supply has built-in overcurrent and short-circuit protection circuits, overcurrent or short circuits will not cause the backup power supply 130 to fail, thus ensuring the backup power supply 130 can continue to operate. Each of these devices is equipped with a fuse; even if a device is overloaded or short-circuited, only the fuse corresponding to that device will automatically trip, while other devices will continue to operate normally without being affected.

[0107] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this disclosure. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0108] This disclosure has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this disclosure to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this disclosure, all of which fall within the scope of protection claimed in this disclosure.

Claims

1. A dissolved oxygen guarantee system for a recirculating aquaculture tank, characterized in that, The circulating water aquaculture pond dissolved oxygen guarantee system comprises: an oxygen source device; a pure oxygen aeration dissolved oxygen device connected to the oxygen source device and adapted to be connected to an aquaculture pond; a dissolved oxygen online monitoring device adapted to be arranged in the aquaculture pond for monitoring an actual dissolved oxygen amount of water in the aquaculture pond; a control device communicatively connected to the pure oxygen aeration dissolved oxygen device and the dissolved oxygen online monitoring device; a backup power supply electrically connected to the pure oxygen aeration dissolved oxygen device, the dissolved oxygen online monitoring device and the control device, the backup power supply being configured to provide a direct current with a safe voltage less than or equal to 24V, wherein the control device is configured to: receive the actual dissolved oxygen amount detected by the dissolved oxygen online monitoring device, and compare the actual dissolved oxygen amount with preset dissolved oxygen interval parameters, the dissolved oxygen interval parameters comprising a lower limit value and an upper limit value of dissolved oxygen, if the actual dissolved oxygen amount reaches or is lower than the lower limit value of dissolved oxygen, control the pure oxygen aeration dissolved oxygen device to be in an open state, if the actual dissolved oxygen amount reaches or is higher than the upper limit value of dissolved oxygen, control the pure oxygen aeration dissolved oxygen device to be in a closed state, wherein the pure oxygen aeration dissolved oxygen device in the open state enables the oxygen source device to deliver oxygen to the aquaculture pond, and the pure oxygen aeration dissolved oxygen device in the closed state enables the oxygen source device to stop delivering oxygen to the aquaculture pond.

2. The circulating water aquaculture pond dissolved oxygen guarantee system according to claim 1, wherein the circulating water aquaculture pond dissolved oxygen guarantee system comprises: a power supply device, the power supply device comprising a mains power supply circuit and a backup power generation circuit, the mains power supply circuit being adapted to be electrically connected to a mains power supply, and the backup power generation circuit being adapted to be electrically connected to a power generation equipment; a main circuit; and a dual power automatic switching switch, an input end of the dual power automatic switching switch being electrically connected to the power supply device, an output end of the dual power automatic switching switch being electrically connected to the main circuit, and the dual power automatic switching switch being configured to automatically switch to be connected to the backup power generation circuit when the mains power supply circuit is powered off, and automatically switch to be connected to the mains power supply circuit when the mains power supply circuit is powered on.

3. The circulating water aquaculture pond dissolved oxygen guarantee system according to claim 2, wherein the circulating water aquaculture pond dissolved oxygen guarantee system further comprises: a control circuit, the control circuit being electrically connected to the main circuit, the backup power supply and the control device, the main circuit supplying power to the control circuit, the backup power supply supplying power to the control circuit, and the control circuit supplying power to the pure oxygen aeration dissolved oxygen device and the dissolved oxygen online monitoring device through the control device.

4. The circulating water aquaculture pond dissolved oxygen guarantee system according to claim 2 or 3, wherein the backup power supply comprises an uninterruptible power supply and a switching power supply, the uninterruptible power supply being electrically connected to the main circuit, the uninterruptible power supply being configured to store electric energy and uninterruptedly provide alternating current electric energy, and the switching power supply being configured to convert the alternating current electric energy into direct current electric energy conforming to the safe voltage. ​ ​ ​ 5. The system of claim 2, wherein the system comprises: a first power-off detection circuit electrically connected to the main circuit, the first power-off detection circuit communicatively connected to the control device, the first power-off detection circuit configured to detect a first power-off signal and a first power-on signal of the power supply circuit; and an alarm electrically connected to the power supply device, the alarm communicatively connected to the control device.

6. The system of claim 3, wherein the control circuit comprises: a first control sub-circuit comprising the control device and a first fuse, the control device electrically connected to the backup power supply via the first fuse; a second control sub-circuit comprising the pure oxygen aeration device and a second fuse, the pure oxygen aeration device electrically connected to the backup power supply via the second fuse; and a third control sub-circuit comprising the dissolved oxygen online monitoring device and a third fuse, the dissolved oxygen online monitoring device electrically connected to the backup power supply via the third fuse.

7. The system of claim 5, wherein the system comprises: a second power-off detection circuit electrically connected to the power supply circuit, the second power-off detection circuit communicatively connected to the control device, the second power-off detection circuit configured to detect a second power-off signal and a second power-on signal of the main circuit.

8. The system of any one of claims 1-3 and 5-7, wherein the control device comprises a controller and a touch screen, the controller communicatively connected to the touch screen, the pure oxygen aeration device, and the dissolved oxygen online monitoring device.

9. The system of any one of claims 2, 3, and 5-7, wherein the system further comprises a recirculating water treatment device adapted to be connected to the recirculating aquaculture system via a pipe, the recirculating water treatment device electrically connected to the main circuit, the recirculating water treatment device communicatively connected to the control device, the control device further configured to control the recirculating water treatment device to drive water circulation in the recirculating aquaculture system and to perform water quality treatment on water in the recirculating aquaculture system.

10. The system of claim 9, wherein the recirculating water treatment device comprises a water pump, a water filter, and a water heater. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The circulating water treatment equipment comprises physical filtering devices, biochemical filtering devices, circulating water dissolving oxygen devices, killing devices and circulating water pumps connected in sequence, the physical filtering devices are adapted to be connected to the culture ponds, and the circulating water pumps are adapted to be connected to the culture ponds, The physical filtering devices, the biochemical filtering devices, the killing devices, the circulating water dissolving oxygen devices and the circulating water pumps are electrically connected to the main circuit, and the physical filtering devices, the biochemical filtering devices, the killing devices, the circulating water dissolving oxygen devices and the circulating water pumps are communicatively connected to the control device, The control device is further configured to control the states of the physical filtering devices, the biochemical filtering devices, the killing devices, the circulating water dissolving oxygen devices and the circulating water pumps.

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