Closed type fishery circulating culture system

Abstract

The application discloses a closed fishery circulating aquaculture system, which comprises an aquaculture device, a water circulation pipeline, a biochemical device, an oxygen supply device and a gas supply device. The aquaculture device comprises an aquaculture tank and a feeding assembly. The aquaculture tank is provided with an aquaculture cavity. The aquaculture tank is provided with a first water inlet pipe and a first water outlet pipe. The feeding assembly is arranged on the aquaculture tank. The water circulation pipeline is arranged between the first water inlet pipe and the first water outlet pipe. The biochemical device comprises a biochemical tank. The biochemical tank is provided with a biochemical cavity. The biochemical cavity is communicated with the water circulation pipeline. The biochemical cavity is used for accommodating nitrifying bacteria. The oxygen supply device is connected with the aquaculture tank and the biochemical tank. The gas supply device is provided with a gas conveying pipe between the aquaculture tank. The closed fishery circulating aquaculture system can not only meet the pressure requirement of aquatic products growing in different environmental pressures, but also make the water dissolving oxygen efficiency in the aquaculture cavity higher and be more beneficial to the growth of the aquatic products. In addition, the biochemical device is more beneficial to the growth of the photophobic and aerobic nitrifying bacteria.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, and in particular to a closed-loop aquaculture system. Background Technology

[0002] Existing aquaculture systems mainly include aquaculture ponds and biological treatment ponds. Water discharged from aquaculture ponds is treated by nitrifying bacteria in biological treatment ponds to reduce ammonia nitrogen content before being reintroduced into aquaculture ponds to achieve water recycling.

[0003] However, existing aquaculture ponds are generally 1 to 2 meters deep, suitable only for aquatic products that live in shallow water. They cannot meet the growth needs of aquatic products that live in deeper waters where environmental pressure is higher. Furthermore, aquatic products in these ponds are easily affected by the external environment. When oxygen is introduced into the pond, most of it is directly discharged from the top, resulting in low dissolved oxygen efficiency, which is detrimental to aquatic product growth and requires frequent replenishment, leading to high energy consumption. In addition, external light easily reaches the nitrifying bacteria in the biological treatment pond. When oxygen is introduced into the biological treatment pond, most of it is discharged directly from the top, resulting in low utilization by the nitrifying bacteria and hindering their growth. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a closed-loop aquaculture system that can not only regulate the environmental pressure within the aquaculture chamber to meet the pressure requirements of aquatic products growing under different environmental pressures, but also reduce the impact of the external environment on aquatic products. Simultaneously, it increases the dissolved oxygen efficiency within the aquaculture chamber, which is more conducive to aquatic product growth, requires less frequent oxygen replenishment, and consumes less energy. Furthermore, the biochemical device is more conducive to the growth of nitrifying bacteria that are anaerobic and photosensitive.

[0005] According to an embodiment of the present invention, a closed-loop aquaculture system includes an aquaculture device, a water circulation pipeline, a biochemical device, an oxygen supply device, and a gas supply device. The aquaculture device includes an aquaculture tank and a feeding assembly. The aquaculture tank forms an aquaculture cavity and is provided with a first inlet pipe and a first outlet pipe. The feeding assembly is disposed in the aquaculture tank for feeding the aquaculture cavity. The water circulation pipeline is disposed between the first inlet pipe and the first outlet pipe. The biochemical device includes a biochemical tank forming a biochemical cavity, which is connected to the water circulation pipeline and is used to contain nitrifying bacteria. The oxygen supply device is connected to the aquaculture tank and the biochemical tank for supplying oxygen to the aquaculture cavity and the biochemical cavity. A gas supply pipe is provided between the gas supply device and the aquaculture tank for supplying gas to the aquaculture cavity to regulate the pressure inside the aquaculture cavity.

[0006] The closed-loop aquaculture system according to embodiments of the present invention has at least the following beneficial effects:

[0007] In this invention, the closed structure of the aquaculture tank not only reduces the impact of the external environment on aquatic products, but also prevents oxygen from flowing directly into the atmosphere when supplying oxygen to the aquaculture chamber through the oxygen supply device. This results in better oxygen-water mixing, higher dissolved oxygen efficiency, and is more conducive to aquatic product growth. It also reduces the frequency of dissolved oxygen replenishment and lowers energy consumption. Secondly, the gas supply device delivers gas to the aquaculture chamber through a gas pipe, regulating the air pressure at the top of the chamber. Since the water pressure inside the chamber is affected by the air pressure environment, it indirectly regulates the water pressure, simulating different water pressure environments at different depths to meet the pressure requirements of aquatic products growing under varying environmental pressures. Furthermore, the closed structure of the biological tank prevents external light from entering the biological chamber, which is ideal for the photophobic habits of nitrifying bacteria. The oxygen discharged from the oxygen supply device remains inside the biological chamber and cannot be freely released, thus facilitating the full utilization of aerobic nitrifying bacteria and promoting the growth of photophobic aerobic nitrifying bacteria. This further enhances the effect of reducing ammonia nitrogen content in the water.

[0008] According to some embodiments of the present invention, the feeding assembly includes a feeding cylinder and a pressure regulating mechanism. The feeding cylinder is located at the top of the aquaculture tank and communicates with the aquaculture chamber. A first valve is provided at the top of the feeding cylinder, and a second valve is provided at the bottom of the feeding cylinder. A storage chamber is formed between the first valve and the second valve in the feeding cylinder. The pressure regulating mechanism is located in the feeding cylinder to regulate the air pressure in the storage chamber.

[0009] According to some embodiments of the present invention, the pressure regulating mechanism includes a first regulating pipe and a second regulating pipe. One end of the first regulating pipe is connected to the feeding cylinder and communicates with the storage chamber, and the other end is used to communicate with the atmosphere. The first regulating pipe is provided with a third valve. One end of the second regulating pipe is connected to the feeding cylinder and communicates with the storage chamber, and the other end is connected to the aquaculture tank and communicates with the aquaculture chamber. The second regulating pipe is provided with a fourth valve.

[0010] According to some embodiments of the present invention, the first water outlet pipe is located at the middle of the bottom end of the aquaculture tank, and there are two first water inlets. The two first water inlets are respectively connected to the two ends of the aquaculture tank along the length direction, and along the projection of the aquaculture tank along the length direction, the connection positions of the two first water inlets to the aquaculture tank are respectively located on opposite sides of the aquaculture tank. When the two first water inlets supply water at the same time, the water in the aquaculture chamber forms a swirling flow under the push of the water discharged from the two first water inlets.

[0011] According to some embodiments of the present invention, the two ends of the aquaculture tank along its length are respectively connected to a first water supply pipe, and the first water inlet pipe and the first water supply pipe at the same end of the aquaculture tank are respectively located on opposite sides of the aquaculture tank. When the two first water supply pipes supply water at the same time, the water in the aquaculture chamber forms a swirling flow under the push of the water discharged from the two first water supply pipes.

[0012] According to some embodiments of the present invention, the aquaculture device further includes a first level gauge assembly, the first level gauge assembly including a level gauge body, a first connecting pipe and a second connecting pipe, the first connecting pipe being connected to the top end of the level gauge body, one end of the first connecting pipe being connected to the aquaculture tank and communicating with the aquaculture chamber, the gas supply pipe being connected to the first connecting pipe, the second connecting pipe being connected to the bottom end of the level gauge body, and the second connecting pipe being connected to the aquaculture tank and communicating with the aquaculture chamber.

[0013] According to some embodiments of the present invention, the biochemical tank is provided with a second inlet pipe and a second outlet pipe connected to the water circulation pipeline. The biochemical device further includes a plurality of attachment structures, which are movably accommodated within the biochemical chamber. The attachment structures are for nitrifying bacteria to attach to. The second inlet pipe is connected to the bottom end of the biochemical tank, and the outlet direction of the second inlet pipe is upward, so that the water discharged from the second inlet pipe can push at least a portion of the attachment structures upward. Alternatively, two second inlet pipes are provided and respectively connected to both ends of the biochemical tank along its length. Along the projection of the biochemical tank along its length, the connection points of the two second inlet pipes with the biochemical tank are located on opposite sides of the biochemical tank. When the two second inlet pipes supply water simultaneously, the water in the biochemical tank forms a swirling flow under the push of the water discharged from the two second inlet pipes, thereby driving at least a portion of the attachment structures to move.

[0014] According to some embodiments of the present invention, a filtration device is further included. The filtration device includes a housing, a filter cartridge, and a water outlet assembly. The housing has an inlet chamber and a purified water chamber. The inlet chamber has an inlet, and the purified water chamber has an outlet. The inlet and the outlet are connected to the water circulation pipeline. The filter cartridge is disposed in the purified water chamber, and one end of the filter cartridge is open and communicates with the inlet chamber. The water outlet assembly includes a movable part, a sliding part, a wastewater pipe, and an elastic element. The movable part is movably disposed in the housing. The sliding part is slidably connected to the movable part. The wastewater pipe is connected to the sliding part. The elastic element is disposed between the movable part and the sliding part. The movable part is movable enough to connect or disconnect the wastewater pipe from the filter cartridge. When the wastewater pipe is connected to the filter cartridge, the elastic force of the elastic element causes the sliding part to have a sliding tendency to move the wastewater pipe closer to the filter cartridge.

[0015] According to some embodiments of the present invention, the movable part is rotatably disposed on the housing, the rotation axis of the movable part is parallel to the length direction of the filter cartridge, the filter cartridge includes at least two groups, each group of the filter cartridge includes multiple filter cartridges arranged circumferentially along the rotation axis, the distance between the filter cartridges of different groups and the rotation axis is different, the sewage pipe is provided with a water inlet end corresponding to each group of the filter cartridges, and the movable part can rotate to make the water inlet end sequentially connected to the multiple filter cartridges of the corresponding group.

[0016] According to some embodiments of the present invention, the oxygen supply device is configured as an oxygen generator, and the closed-loop aquaculture system further includes a heat exchange pipeline for conveying a heat exchange medium. The heat exchange pipeline has a first section and a second section. The first section is connected to the oxygen generator, and the second section is connected to the biochemical tank and / or the water circulation pipeline. The heat exchange medium can absorb the heat generated by the oxygen generator when passing through the first section, and can exchange heat with the water in the biochemical tank and / or the water circulation pipeline when passing through the second section.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the closed-loop aquaculture system of the present invention;

[0020] Figure 2 This is a schematic diagram of one type of aquaculture equipment.

[0021] Figure 3 A schematic diagram of the feeding assembly installation;

[0022] Figure 4 This is a schematic diagram of the installation of the first level gauge assembly;

[0023] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 2 Enlarged view of point B in the middle;

[0025] Figure 7 This is a schematic diagram of the installation of the sewage discharge components;

[0026] Figure 8 A schematic diagram showing the formation of swirling currents in the aquaculture chamber;

[0027] Figure 9 A schematic diagram of the oxygen supply system for the aquaculture chamber;

[0028] Figure 10 This is a structural diagram of an aquaculture tank;

[0029] Figure 11 This is a schematic diagram of one type of biochemical device.

[0030] Figure 12 This is a schematic diagram showing the second water inlet pipe connected to the bottom of the biochemical tank.

[0031] Figure 13 This is a schematic diagram showing the second water inlet pipe connected to both ends of the biochemical tank along its length.

[0032] Figure 14 This is a schematic diagram of one type of filtration device.

[0033] Figure 15 for Figure 14 A sectional view;

[0034] Figure 16 This is a schematic diagram illustrating the process of water filtration.

[0035] Figure 17 This is a schematic diagram illustrating the process of cleaning the filter cartridge.

[0036] Figure 18 This is a schematic diagram of the filter cartridge installation.

[0037] Figure 19 This is a schematic diagram of the installation of the elastic ring;

[0038] Figure 20 for Figure 15 A magnified view of point C in the middle.

[0039] Icon labels:

[0040] Aquaculture device 100; aquaculture tank 101; feeding assembly 102; aquaculture chamber 103; first water inlet pipe 104; first water outlet pipe 105; feeding cylinder 106; first valve 107; second valve 108; storage chamber 109; first regulating pipe 110; third valve 111; second regulating pipe 112; fourth valve 113; first water replenishment pipe 114; first level gauge assembly 115; level gauge body 116; first connecting pipe 117; second connecting pipe 118; sampling pipe 119; fifth valve 120; pressure sensor 121; seventh valve 122; pressure gauge 123; larvae inlet 124; first observation window 125; sewage discharge assembly 126; sewage collection cylinder 127; filter pipe 128; first filter screen 129; first filter hole 130; second filter hole 131; end cap 132; interception plate 133; fish outlet pipe 134;

[0041] Water circulation pipeline 200; First pump 201;

[0042] Biochemical device 300; biochemical tank 301; biochemical chamber 302; second inlet pipe 303; second outlet pipe 304; attachment structure 305; outlet section 306; second replenishment pipe 307; water collection cylinder 308; second filter screen 309; second level gauge assembly 310; eighth valve 311; feeding port 312; second observation window 313;

[0043] Oxygen supply device 400; oxygen delivery pipe 401; aeration disc 402; aeration pipe 403;

[0044] Gas supply device 500; gas pipeline 501; sixth valve 502;

[0045] Filter device 600; housing 601; water inlet chamber 602; clean water chamber 603; water inlet 604; water outlet 605; filter cartridge 606; water outlet assembly 607; movable part 608; sliding part 609; sewage pipe 610; elastic element 611; water inlet end 612; partition 613; connecting port 614; elastic ring 615; drive motor 616; first connecting part 617; sliding sleeve 618; connecting sleeve 619; second connecting part 620; drain pipe 621; ninth valve 622; water outlet end 623.

[0046] Heat exchange piping 700; Section 1 701; Section 2 702; Transport section 703; Section 3 704;

[0047] Refrigeration unit 800;

[0048] Disinfection device 900. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0052] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0053] The following is for reference. Figures 1 to 20 A closed-loop aquaculture system according to an embodiment of the present invention is described.

[0054] like Figures 1 to 20 As shown, the closed-loop aquaculture system according to an embodiment of the present invention includes an aquaculture device 100, a water circulation pipeline 200, a biochemical device 300, an oxygen supply device 400, and an air supply device 500.

[0055] The aquaculture device 100 includes an aquaculture tank 101 and a feeding assembly 102. The aquaculture tank 101 is a closed structure and has an aquaculture chamber 103 for aquaculture. The aquaculture chamber 103 is used to aquaculture aquatic products, which can be fish or other suitable species, such as shrimp. The aquaculture device 100 can have one or more components, for example, three. The aquaculture tank 101 is provided with a first water inlet pipe 104 and a first water outlet pipe 105. There can be one or more first water inlet pipes 104, which are connected to the aquaculture chamber 103 to supply water into the chamber. There can be one or more first water outlet pipes 105, which are connected to the aquaculture chamber 103 to discharge water from the chamber. The feeding assembly 102 is located in the aquaculture tank 101 and is used to feed the aquatic products into the aquaculture chamber 103.

[0056] A water circulation pipeline 200 is located between the first inlet pipe 104 and the first outlet pipe 105. For example, when multiple aquaculture devices 100 are installed, the water circulation pipeline 200 can have multiple inlet connection ends and multiple outlet connection ends. The multiple inlet connection ends are respectively connected to the first outlet pipes 105 of the multiple aquaculture devices 100, and the multiple outlet connection ends are respectively connected to the first inlet pipes 104 of the multiple aquaculture devices 100. The water circulation pipeline 200 can be equipped with a first pump 201 for pumping water. The water discharged from the first outlet pipe 105 enters the water circulation pipeline 200, and after being purified by the biochemical device 300 and other water purification structures on the water circulation pipeline 200, it re-enters the aquaculture chamber 103 through the first inlet pipe 104 to achieve water recycling.

[0057] The biochemical device 300 includes a biochemical tank 301, which is a closed structure. The biochemical tank 301 forms a biochemical cavity 302, which is used to contain nitrifying bacteria. The biochemical cavity 302 is connected to a water circulation pipeline 200. Specifically, the biochemical tank 301 may be provided with a second inlet pipe 303 and a second outlet pipe 304. There may be one or more second inlet pipes 303. The second inlet pipe 303 connects the biochemical cavity 302 and the water circulation pipeline 200 to allow the water circulation pipeline 200 to input water to be treated into the biochemical cavity 302. There may be one or more second outlet pipes 304. The second outlet pipe 304 connects the biochemical cavity 302 and the water circulation pipeline 200 to allow the water in the biochemical cavity 302 that has been treated by nitrifying bacteria to be discharged back into the water circulation pipeline 200.

[0058] An oxygen supply device 400 is connected to the aquaculture tank 101 and the biochemical tank 301 to supply oxygen to the aquaculture chamber 103 and the biochemical chamber 302. For example, the oxygen supply device 400 may be connected to an oxygen delivery pipe 401, which has at least two oxygen outlets connected to the aquaculture tank 101 and the biochemical tank 301, respectively. The oxygen supply device 400 supplies oxygen to the aquaculture chamber 103 and the biochemical chamber 302 through the oxygen delivery pipe 401.

[0059] An air supply pipe 501 is provided between the air supply device 500 and the aquaculture tank 101 to supply gas into the aquaculture chamber 103 and regulate the pressure inside the aquaculture chamber 103. The air supply device 500 can be a gas generator such as an air compressor, and the gas supplied by the air supply device 500 can be air, nitrogen, or other gases that are difficult to dissolve in water.

[0060] In this invention, because the aquaculture tank 101 has a closed structure, it not only reduces the impact of the external environment on aquatic products, but also prevents oxygen from flowing directly into the atmosphere when oxygen is supplied to the aquaculture chamber 103 through the oxygen supply device 400. This results in better oxygen-water mixing, higher dissolved oxygen efficiency, and is more conducive to the growth of aquatic products. It also reduces the frequency of dissolved oxygen replenishment and lowers energy consumption. Secondly, the gas supply device 500 delivers gas to the aquaculture chamber 103 through the gas pipe 501, which can regulate the air pressure at the top of the aquaculture chamber 103. Since the water pressure inside the aquaculture chamber 103 is affected by the air pressure environment, it can indirectly regulate the water pressure inside the aquaculture chamber 103, thereby simulating water pressure environments at different depths and meeting the pressure requirements of aquatic products growing under different environmental pressures. Furthermore, since the biological tank 301 is a closed structure, external light is difficult to enter the biological chamber 302, which is perfect for the photophobic habits of nitrifying bacteria. Moreover, the oxygen discharged from the oxygen supply device 400 will remain in the biological chamber 302 and cannot be discharged at will, which is conducive to the full utilization of aerobic nitrifying bacteria and even more conducive to the growth of photophobic aerobic nitrifying bacteria, thus achieving a better effect in reducing the ammonia nitrogen content in the water.

[0061] It should be noted that the aquaculture tank 101 may also be equipped with a fry inlet 124, which may be fitted with an openable and closable cover. The fry inlet 124 is used to introduce fish fry or other aquatic product fry. The aquaculture tank 101 may also be equipped with a first observation window 125 to facilitate observation of the conditions inside the aquaculture chamber 103. The top of the biochemical tank 301 may also be equipped with a feeding port 312, which may be fitted with an openable and closable cover. The feeding port 312 is used to introduce nitrifying bacteria, etc., into the biochemical tank 301. The biochemical tank 301 may also be equipped with a second observation window 313. There may be one or more second observation windows 313. For example, two may be provided, one on the side of the biochemical tank 301 and one on the top of the biochemical tank 301. The second observation window 313 is used to observe the conditions inside the biochemical chamber 302.

[0062] If a feeding port and a cover for opening and closing the feeding port are directly installed in the aquaculture tank 101, and feeding is done into the aquaculture chamber 103 and the cover is opened, the aquaculture chamber 103 will connect with the external environment, causing the air pressure inside the aquaculture chamber 103 to drop rapidly to atmospheric pressure. This, in turn, will cause a rapid drop in the water pressure inside the aquaculture chamber 103, thus affecting the growth of aquatic products inside the aquaculture chamber 103 and even causing the death of aquatic products inside the aquaculture chamber 103. (Reference) Figure 3 As shown, in some embodiments of the present invention, the feeding assembly 102 includes a feeding cylinder 106 and a pressure regulating mechanism. The feeding cylinder 106 is located at the top of the breeding tank 101 and communicates with the breeding chamber 103. A first valve 107 is provided at the top of the feeding cylinder 106, and a second valve 108 is provided at the bottom of the feeding cylinder 106. A storage chamber 109 is formed between the first valve 107 and the second valve 108 in the feeding cylinder 106. The pressure regulating mechanism is located in the feeding cylinder 106 to regulate the air pressure in the storage chamber 109. For example, the top and bottom of the feeding cylinder 106 can both be through-hole. The first valve 107 is used to open and close the top of the feeding cylinder 106, and the second valve 108 is used to open and close the bottom of the feeding cylinder 106. The pressure regulating mechanism is used to regulate the air pressure in the storage chamber 109, and can at least regulate the air pressure in the storage chamber 109 to near atmospheric pressure and to near the air pressure in the breeding chamber 103.

[0063] In this embodiment, when feeding is required into the aquaculture chamber 103, the air pressure in the storage chamber 109 can be adjusted to near atmospheric pressure using a pressure regulating mechanism. With the air pressures on both sides of the first valve 107 being similar, the first valve 107 can be easily opened. After the feed is poured into the storage chamber 109, the first valve 107 is closed. Then, the air pressure in the storage chamber 109 is adjusted to near atmospheric pressure using the pressure regulating mechanism, and the air pressures on both sides of the second valve 108 are similar, allowing the second valve 108 to be easily opened. The feed in the storage chamber 109 can also easily fall into the aquaculture chamber 103. Furthermore, before opening the second valve 108, since the air pressure in the storage chamber 109 is close to the air pressure in the aquaculture chamber 103, it will not affect the air pressure in the aquaculture chamber 103, thus not affecting the growth of aquatic products in the aquaculture chamber 103, and preventing the death of aquatic products in the aquaculture chamber 103. This makes it more convenient to use and more practical.

[0064] refer to Figure 3 As shown, in some embodiments of the present invention, the pressure regulating mechanism includes a first regulating pipe 110 and a second regulating pipe 112. One end of the first regulating pipe 110 is connected to the feeding tube 106 and communicates with the storage chamber 109, and the other end is used to communicate with the atmosphere. The first regulating pipe 110 is provided with a third valve 111. One end of the second regulating pipe 112 is connected to the feeding tube 106 and communicates with the storage chamber 109, and the other end is connected to the breeding tank 101 and communicates with the breeding chamber 103. The second regulating pipe 112 is provided with a fourth valve 113.

[0065] In this embodiment, opening the third valve 111 allows the storage chamber 109 to connect with the external atmospheric environment via the first regulating pipe 110, thereby enabling the air pressure inside the storage chamber 109 to be quickly adjusted to near atmospheric pressure. Opening the fourth valve 113 allows the storage chamber 109 to connect with the breeding chamber 103 via the second regulating pipe 112, thereby enabling the air pressure inside the storage chamber 109 to be quickly adjusted to near the air pressure inside the breeding chamber 103. This design is not only simple in structure and easy to operate, but also has high adjustment accuracy and better practicality.

[0066] It should be noted that the pressure regulating mechanism can also be other structures, such as an air pump, which can be used to evacuate or release air from the storage chamber 109, thereby regulating the air pressure in the storage chamber 109. The structure of the feeding component 102 will also differ depending on the structure of the pressure regulating mechanism, which will not be elaborated further here.

[0067] In some embodiments of the present invention, the first valve 107, the second valve 108, the third valve 111, and the fourth valve 113 can all be solenoid valves. Multiple visual sensors can be installed inside the aquaculture chamber 103. The first valve 107, the second valve 108, the third valve 111, the fourth valve 113, and the visual sensors can all be connected to an external control system. The control system has a database and stores algorithm programs. The database stores a large amount of data, including the activity status of different aquatic products at different growth stages, the required feeding frequency, and the required feed quantity. The visual sensors can monitor the activity status of the aquatic products in real time and send the activity status information to the database. The control system compares the information sent by the visual sensors with the data in the database through the algorithm program to determine whether the aquatic products are in a hungry or full state. Based on the determination result, it controls the opening and closing of the first valve 107, the second valve 108, the third valve 111, and the fourth valve 113, thereby achieving precise feeding. This not only makes aquaculture more convenient but also increases aquaculture efficiency and improves results, while reducing feed waste and lowering economic costs.

[0068] It should be noted that in some other embodiments of the present invention, the first valve 107, the second valve 108, the third valve 111, and the fourth valve 113 may also be manual valves.

[0069] refer to Figure 2 and Figure 8 As shown, in some embodiments of the present invention, the first water outlet pipe 105 is located at the middle of the bottom end of the breeding tank 101, and there are two first water inlet pipes 104. The two first water inlet pipes 104 are respectively connected to the two ends of the breeding tank 101 along the length direction, and along the projection of the breeding tank 101 along the length direction, the connection positions of the two first water inlet pipes 104 and the breeding tank 101 are respectively located on opposite sides of the breeding tank 101. When the two first water inlet pipes 104 supply water at the same time, the water in the breeding chamber 103 forms a swirling flow under the push of the water discharged from the two first water inlet pipes 104.

[0070] For example, the first outlet pipe 105 supplies water mixed with excrement and feed residue for discharge. The two ends of the length direction of the breeding tank 101 can be the first end and the second end, respectively. One first inlet pipe 104 is located at the first end, and the other first inlet pipe 104 is located at the second end. Along the projection of the length direction of the breeding tank 101, the outlet positions of the two first inlet pipes 104 can be located on both sides of the width direction of the breeding tank 101. The outlet direction of the first inlet pipe 104 can be the length direction of the breeding tank 101, that is, the outlet direction of one first inlet pipe 104 is from the first end to the second end, and the outlet direction of the other first inlet pipe 104 is from the second end to the first end.

[0071] Thus, when both first water inlet pipes 104 supply water simultaneously, the water in the aquaculture chamber 103 forms a swirling current under the impetus of the water discharged from the two first water inlet pipes 104, with the center of the swirling current located near the middle of the aquaculture tank 101. This swirling water flow carries excrement and feed residue from the aquaculture chamber 103 to the vicinity of the first water outlet pipe 105 in the middle of the aquaculture tank 101, facilitating the rapid and thorough discharge of excrement and feed residue through the first water outlet pipe 105, thereby promoting the growth of aquatic products. Furthermore, the water flow also improves dissolved oxygenation.

[0072] The water discharged from the first outlet pipe 105, after undergoing filtration, nitrification, sterilization, and other treatments, flows back into the aquaculture chamber 103 of the aquaculture tank 101 through the first inlet pipe 104. However, during long-term aquaculture, a certain amount of water will be absorbed by the aquatic products, and some water may also be wasted through other means. (Reference) Figure 2 and Figure 8 As shown, in some embodiments of the present invention, the two ends of the aquaculture tank 101 along its length are respectively connected to a first water supply pipe 114. The first water supply pipe 114 can periodically replenish the water in the aquaculture chamber 103 that has decreased, so that the water volume in the aquaculture chamber 103 meets the requirements for aquaculture. Moreover, the first water inlet pipe 104 and the first water supply pipe 114 at the same end of the aquaculture tank 101 are respectively located on opposite sides of the aquaculture tank 101. When the two first water supply pipes 114 supply water at the same time, the water in the aquaculture chamber 103 forms a swirling flow under the push of the water discharged from the two first water supply pipes 114.

[0073] For example, one first water supply pipe 114 is located at the first end and the other first water supply pipe 114 is located at the second end. Along the projection of the length direction of the breeding tank 101, the outlet positions of the two first water supply pipes 114 can be located on both sides of the width direction of the breeding tank 101, and the outlet direction of the first water supply pipe 114 can be the length direction of the breeding tank 101. That is, the outlet direction of one first water supply pipe 114 is from the first end to the second end, and the outlet direction of the other first water supply pipe 114 is from the second end to the first end. When the two first water supply pipes 114 supply water at the same time, the water in the breeding chamber 103 forms a vortex under the push of the water discharged from the two first water supply pipes 114. The center of the vortex is close to the middle of the breeding tank 101. In this way, the swirling water flow can gradually move the excrement and feed residue in the aquaculture chamber 103 to the vicinity of the first water outlet pipe 105 in the middle of the aquaculture tank 101, thus facilitating the rapid and thorough discharge of excrement and feed residue through the first water outlet pipe 105, which is more conducive to the growth of aquatic products. In addition, the water flow also improves the dissolved oxygen effect.

[0074] refer to Figure 7 and Figure 8As shown, in some embodiments of the present invention, the aquaculture device 100 further includes a sewage discharge component 126. The sewage discharge component 126 includes a sewage collection cylinder 127 and a filter tube 128. The sewage collection cylinder 127 can be located at the middle of the bottom end of the aquaculture tank 101. The top end of the sewage collection cylinder 127 is connected to the aquaculture chamber 103 and is provided with a first filter screen 129. The first water outlet pipe 105 is connected to the sewage collection cylinder 127. The filter tube 128 can be vertically installed in the aquaculture chamber 103. The top end of the filter tube 128 extends to the top end of the aquaculture chamber 103 and is closed. The bottom end of the filter tube 128 is connected to the sewage collection cylinder 127. The top end of the side wall of the filter tube 128 is provided with a plurality of first filter holes 130, and the bottom end of the side wall of the filter tube 128 is provided with a plurality of second filter holes 131.

[0075] For example, the top of the sludge collection cylinder 127 can be through-connected, and a first filter screen 129 can be disposed at the top of the sludge collection cylinder 127. The pore size of the first filter screen 129 is larger than the size of the aquatic product's excrement and feed residue, but smaller than the size of the aquatic product. The bottom end of the filter tube 128 can be through-connected and extend into the sludge collection cylinder 127. The first filter screen 129 can surround the periphery of the filter tube 128 and be connected to the outer wall of the filter tube 128. The pore size of the first filter hole 130 and the second filter hole 131 is larger than the size of the aquatic product's excrement and feed residue, but smaller than the size of the aquatic product.

[0076] In this embodiment, during the aquaculture process, the excrement and feed residue of the aquatic products can enter the sludge collection cylinder 127 through the filter holes of the first filter screen 129, and then be discharged through the first water outlet pipe 105. This results in better sludge removal and is more conducive to the growth of aquatic products. Furthermore, the first filter screen 129 can prevent economic losses caused by aquatic products being discharged through the first water outlet pipe 105. A filter tube 128 is provided, and multiple first filter holes 130 and multiple second filter holes 131 are respectively provided at the top and bottom of the side wall of the filter tube 128. Excrement and feed residue floating at the top of the breeding chamber 103 can enter the filter tube 128 through the first filter holes 130, and then be discharged through the sludge collection cylinder 127 and the first water outlet pipe 105. Excrement and feed residue at the bottom of the breeding chamber 103 can enter the filter tube 128 through the second filter holes 131, and then be discharged through the sludge collection cylinder 127 and the first water outlet pipe 105. In this way, the sewage discharge effect of the breeding tank 101 is better, which makes the water in the breeding chamber 103 cleaner and more conducive to the growth of aquatic products.

[0077] It should be noted that the top of the sludge collection cylinder 127 can extend into the breeding chamber 103, or the bottom of the breeding tank 101 can be provided with a sludge discharge port, and the top of the sludge collection cylinder 127 can be connected to the sludge discharge port.

[0078] refer to Figure 2 , Figures 4 to 6As shown, in some embodiments of the present invention, the aquaculture device 100 further includes a first level gauge assembly 115. The first level gauge assembly 115 includes a level gauge body 116, a first connecting pipe 117 and a second connecting pipe 118. The first connecting pipe 117 is connected to the top end of the level gauge body 116. One end of the first connecting pipe 117 is connected to the aquaculture tank 101 and communicates with the aquaculture chamber 103. An air supply pipe 501 is connected to the first connecting pipe 117. The second connecting pipe 118 is connected to the bottom end of the level gauge body 116 and is connected to the aquaculture tank 101 and communicates with the aquaculture chamber 103.

[0079] For example, the level gauge body 116 can be vertically installed, and can be a circular tube structure. The level gauge body 116 can be made of a transparent material, such as transparent glass or transparent plastic. The level gauge body 116 can have multiple scale lines, which can be evenly arranged along the length of the level gauge body 116. These scale lines facilitate accurate observation of the water level in the aquaculture chamber 103 by the staff. The top of the level gauge body 116 can be connected to one end of the first connecting pipe 117. The other end of the first connecting pipe 117 can be welded to the top of the aquaculture tank 101 or connected in other suitable ways. The top of the aquaculture tank 101 can have a connection hole corresponding to the first connecting pipe 117, through which the first connecting pipe 117 communicates with the aquaculture chamber 103 of the aquaculture tank 101. The bottom end of the level gauge body 116 can be connected to one end of the second connecting pipe 118. The other end of the second connecting pipe 118 can be welded to the bottom end of the aquaculture tank 101 or connected by other suitable means. The bottom end of the aquaculture tank 101 can be provided with a connection hole corresponding to the second connecting pipe 118. The second connecting pipe 118 communicates with the aquaculture chamber 103 of the aquaculture tank 101 through this connection hole. The bottom end of the level gauge body 116 communicates with the liquid space at the bottom end of the aquaculture chamber 103, and the top end of the level gauge body 116 communicates with the gas space at the top end of the aquaculture chamber 103, thereby facilitating the observation of the water level in the aquaculture chamber 103 by the staff.

[0080] In this invention, the aquaculture tank 101 can be machined with two connection holes corresponding to the first level gauge assembly 115. One connection hole is near the top of the aquaculture tank 101, and the other connection hole is near the bottom of the aquaculture tank 101. The gas supply pipe 501 can be pre-connected to the first connecting pipe 117 at the factory. During tank assembly, one end of the first connecting pipe 117 is connected to the top of the aquaculture tank 101 and communicates with the aquaculture chamber 103 through the connection hole at the top of the aquaculture tank 101. One end of the second connecting pipe 118 is connected to the bottom of the aquaculture tank 101 and communicates with the aquaculture chamber 103 through the connection hole at the bottom of the aquaculture tank 101. This eliminates the need to connect the gas supply pipe 501 to the aquaculture tank 101, making assembly more convenient. Furthermore, the aquaculture tank 101 does not need to have connection holes for connecting the gas supply pipe 501 machined, making its machining easier. In addition, the reduced number of connection holes on the aquaculture tank 101 improves its sealing performance.

[0081] refer to Figure 4 and Figure 6 As shown, in some embodiments of the present invention, the first level gauge assembly 115 further includes a sampling tube 119, which is connected to the second connecting tube 118, and the sampling tube 119 is provided with a fifth valve 120. For example, the sampling tube 119 may be connected to the bottom of the second connecting tube 118, the sampling tube 119 may extend downward, and the fifth valve 120 may be a manual valve or an automatic valve.

[0082] In this embodiment, during the aquaculture process, the fifth valve 120 closes the sampling tube 119 to prevent water in the aquaculture chamber 103 from flowing out of the sampling tube 119. When it is necessary to test whether the water in the aquaculture chamber 103 meets the aquaculture requirements, the fifth valve 120 can be opened to take a small amount of water from the sampling tube 119 for testing. The operation is simple, convenient, time-saving, and labor-saving. In addition, the sampling tube 119 is located on the second connecting pipe 118, which not only facilitates the outflow of water from the aquaculture chamber 103, but also eliminates the need to connect the sampling tube 119 to the aquaculture tank 101 during assembly, making assembly more convenient. Furthermore, it eliminates the need to additionally machine a connection hole for connecting the sampling tube 119 on the aquaculture tank 101, making the processing of the aquaculture tank 101 more convenient. In addition, the reduction in connection holes on the aquaculture tank 101 also improves the sealing performance of the aquaculture tank 101.

[0083] refer to Figure 4 and Figure 5As shown, in some embodiments of the present invention, the first connecting pipe 117 is provided with a pressure sensor 121 for detecting the air pressure in the breeding chamber 103, and the air supply pipe 501 is provided with a sixth valve 502, which opens or closes the air supply pipe 501 according to the air pressure value detected by the pressure sensor 121. For example, the sixth valve 502 can be a solenoid valve. Both the pressure sensor 121 and the sixth valve 502 can be connected to the control system of the closed-loop aquaculture system. When the pressure sensor 121 detects that the air pressure in the aquaculture chamber 103 is less than the preset value, it sends a signal to the controller of the control system. The controller controls the sixth valve 502 to open the air supply pipe 501, so that the air supply pipe 501 can replenish the air into the aquaculture chamber 103 in time, so that the air pressure in the aquaculture chamber 103 rises to the pressure required by the aquatic products. When the air pressure in the aquaculture chamber 103 rises to the required air pressure, the pressure sensor 121 senses and sends a signal to the controller. The controller controls the sixth valve 502 to close the air supply pipe 501 and stop the air intake. The system has a high degree of automation, is more convenient to use, and the air pressure regulation is more precise, which is more conducive to the growth of aquatic products.

[0084] refer to Figure 2 As shown, in some embodiments of the present invention, a seventh valve 122 is provided at the top of the aquaculture tank 101. The seventh valve 122 is connected to the aquaculture chamber 103. The seventh valve 122 is a pressure balancing valve. The seventh valve 122 can switch between an open state and a closed state according to the air pressure value detected by the pressure sensor 121. For example, the seventh valve 122 can be a solenoid valve. The seventh valve 122 can be connected to the control system of the closed-loop aquaculture system. When the pressure sensor 121 detects that the air pressure in the aquaculture chamber 103 is greater than the preset value, it sends a signal to the controller of the control system. The controller controls the seventh valve 122 to open, so that some of the gas in the aquaculture chamber 103 can be discharged through the seventh valve 122, so that the air pressure in the aquaculture chamber 103 drops to the pressure required by the aquatic products. When the air pressure in the aquaculture chamber 103 drops to the required air pressure, the pressure sensor 121 senses and sends a signal to the controller. The controller controls the seventh valve 122 to close, stopping the exhaust. This system has a high degree of automation, is more convenient to use, and the air pressure regulation is more precise, which is more conducive to the growth of aquatic products. In addition, it can prevent the explosion caused by excessive air pressure in the aquaculture chamber 103, thus improving safety.

[0085] It should be noted that in some other embodiments of the present invention, the air supply pipe 501 may also be configured to both intake and exhaust air.

[0086] refer to Figure 4 and Figure 6As shown, in some embodiments of the present invention, the second connecting pipe 118 is equipped with a pressure gauge 123 for detecting the water pressure inside the aquaculture chamber 103. The pressure gauge 123 allows staff to readily and intuitively understand the water pressure inside the aquaculture chamber 103, enabling timely adjustments to bring the water pressure to the required level, which is more conducive to the growth of aquatic products.

[0087] refer to Figure 10 As shown, in some embodiments of the present invention, a detachable end cap 132 is provided on one side of the aquaculture tank 101, and an intercepting plate 133 is provided on the bottom surface of the aquaculture chamber 103 near the end cap 132. An extraction port is formed between the top surface of the intercepting plate 133 and the top surface of the aquaculture chamber 103. For example, the end cap 132 and the aquaculture tank 101 can be connected or snapped together by fasteners, and the intercepting plate 133 and the aquaculture tank 101 can be integrally formed or welded together. Of course, the intercepting plate 133 and the aquaculture tank 101 can also be detachably connected, for example, by fasteners or snap-fit. The two sides of the intercepting plate 133 can abut or be connected to the side wall of the aquaculture chamber 103. The intercepting plate 133 can be a mesh structure to reduce the obstruction of water flow by the intercepting plate 133.

[0088] In this embodiment, after the aquatic products are cultured, the end cap 132 can be opened to take out the cultured aquatic products. Since the interceptor plate 133 is provided, the aquatic products can be prevented from being poured out directly after the end cap 132 is opened. The staff can slowly take them out from the retrieval port between the top surface of the interceptor plate 133 and the top surface of the culture chamber 103, which is more convenient to use.

[0089] It should be noted that in some other embodiments of the present invention, the aquaculture tank 101 can also be an integral structural component, and the fish outlet pipe 134 can be directly provided on the aquaculture tank 101, and a valve can be provided on the fish outlet pipe 134.

[0090] refer to Figure 9 As shown, in some embodiments of the present invention, the oxygen supply device 400 further includes a plurality of aeration discs 402 disposed at the bottom end of the aquaculture chamber 103. The plurality of aeration discs 402 are connected to the oxygen supply pipe 401, and the aeration discs 402 are provided with a plurality of aeration holes. For example, there may be four aeration discs 402, which are divided into two groups, and the two groups of aeration discs 402 are distributed on opposite sides of the aquaculture tank 101.

[0091] In this embodiment, the oxygen generated by the oxygen supply device is transported to the corresponding aeration disc 402 through the oxygen delivery pipe 401, and then aerated into the aquaculture chamber 103 through the aeration holes, thereby achieving oxygen supply. Moreover, multiple aeration discs 402 are provided, so that oxygen can enter the aquaculture chamber 103 more comprehensively and evenly, thereby allowing oxygen to fully contact with water, resulting in better oxygenation and higher oxygenation efficiency. Furthermore, when oxygen is aerated into the aquaculture chamber 103 from the multiple aeration holes of the aeration disc 402, it will form fine bubbles under high pressure, thereby making the oxygen and water contact more fully, resulting in better oxygenation and higher oxygenation efficiency.

[0092] refer to Figures 11 to 13 As shown, in some embodiments of the present invention, the biochemical device 300 further includes a plurality of attachment structures 305, which are movably accommodated within the biochemical chamber 302. The attachment structures 305 are for nitrifying bacteria to attach to. Water discharged from the second inlet pipe 303 and / or oxygen discharged from the oxygen supply device 400 into the biochemical chamber 302 can drive at least a portion of the attachment structures 305 to move within the biochemical tank 301. For example, the attachment structures 305 can be porous biospheres, porous ceramic particles, or other suitable filter media. When subjected to external force, the attachment structures 305 can freely roll and move within the biochemical tank 301.

[0093] In this invention, the water discharged from the second inlet pipe 303 and / or the oxygen discharged from the oxygen supply device 400 into the biochemical chamber 302 can drive at least some of the attachment structures 305 to move and roll within the biochemical tank 301, which is more conducive to the convenient and uniform attachment of nitrifying bacteria to each attachment structure 305, and also to more uniform and sufficient contact between nitrifying bacteria and oxygen, which is more conducive to the growth of nitrifying bacteria, thereby achieving a better effect in reducing the ammonia nitrogen content in the water.

[0094] refer to Figure 12 As shown, in some embodiments of the present invention, the second inlet pipe 303 is connected to the bottom of the biochemical tank 301, and the water outlet direction of the second inlet pipe 303 is upward, so that the water discharged from the second inlet pipe 303 can push at least part of the attachment structure 305 upward. After the water in the second inlet pipe 303 is discharged upward, it can push at least part of the attachment structure 305 upward. After the attachment structure 305 moves upward for a certain distance, it moves downward under its own gravity, thereby realizing a reciprocating rolling motion. This is more conducive to the convenient and uniform attachment of nitrifying bacteria to each attachment structure 305, and is also conducive to more uniform and sufficient contact between nitrifying bacteria and oxygen, which is more conducive to the growth of nitrifying bacteria, thereby achieving a better effect in reducing the ammonia nitrogen content in the water.

[0095] refer to Figure 12As shown, in some embodiments of the present invention, the second water inlet pipe 303 includes a water outlet section 306, which is horizontally disposed at the bottom end of the biochemical tank 301, and the top of the water outlet section 306 is provided with a plurality of water outlet holes. For example, one or more water outlet sections 306 may be provided, and the top of each water outlet section 306 is provided with a plurality of water outlet holes arranged along the length direction of the water outlet section 306.

[0096] In this way, the water in the second inlet pipe 303 can be discharged from multiple outlet holes, which in turn allows more attachment structures 305 to move upward and achieve reciprocating rolling motion. This makes it easier for nitrifying bacteria to attach to each attachment structure 305 conveniently and evenly, and also makes it easier for nitrifying bacteria to have more even and sufficient contact with oxygen, which is more conducive to the growth of nitrifying bacteria and thus has a better effect on reducing the ammonia nitrogen content in the water.

[0097] refer to Figure 11 and Figure 13 As shown, in some embodiments of the present invention, there are two second water inlet pipes 303. The two second water inlet pipes 303 are respectively connected to the two ends of the biochemical tank 301 along the length direction. The connection positions of the two second water inlet pipes 303 and the biochemical tank 301 are respectively located on opposite sides of the biochemical tank 301. When the two second water inlet pipes 303 supply water at the same time, the water in the biochemical tank 301 forms a swirling flow under the push of the water discharged from the two second water inlet pipes 303, so as to drive at least part of the attachment structure 305 to move. For example, the two ends of the biochemical tank 301 along its length can be the first end and the second end, respectively. One second water inlet pipe 303 is located at the first end, and the other second water inlet pipe 303 is located at the second end. Along the projection of the biochemical tank 301 along its length, the outlet positions of the two second water inlet pipes 303 can be located on both sides of the width direction of the biochemical tank 301. The outlet direction of the second water inlet pipe 303 can be the length direction of the biochemical tank 301, that is, the outlet direction of one second water inlet pipe 303 is from the first end to the second end, and the outlet direction of the other second water inlet pipe 303 is from the second end to the first end.

[0098] Thus, when the two second water inlet pipes 303 supply water simultaneously, the water in the biochemical tank 301 can form a swirling flow under the push of the water discharged from the two second water inlet pipes 303. The swirling water can drive at least some of the attachment structures 305 to move along with it, which is more conducive to the nitrifying bacteria attaching to each attachment structure 305 conveniently and evenly, and is also conducive to the nitrifying bacteria having more even and sufficient contact with oxygen, which is more conducive to the growth of nitrifying bacteria, thereby reducing the ammonia nitrogen content in the water more effectively.

[0099] During long-term aquaculture, a certain amount of water will be absorbed by the aquatic products; additionally, some water may be wasted through other means. (Reference) Figure 11 and Figure 13 As shown, in some embodiments of the present invention, both ends of the biochemical tank 301 along its length are connected to a second water supply pipe 307, which can periodically replenish a certain amount of water. Furthermore, the second water inlet pipe 303 and the second water supply pipe 307 at the same end of the biochemical tank 301 are located on opposite sides of the biochemical tank 301. When the two second water supply pipes 307 supply water simultaneously, the water inside the biochemical tank 301 forms a swirling flow under the pressure of the water discharged from the two second water supply pipes 307, thereby driving at least a portion of the attachment structure 305 to move. For example, one second water supply pipe 307 is located at the first end and the other second water supply pipe 307 is located at the second end. According to the projection along the length direction of the biochemical tank 301, the outlet positions of the two second water supply pipes 307 can be located on both sides of the width direction of the biochemical tank 301, and the outlet direction of the second water supply pipes 307 can be the length direction of the biochemical tank 301. That is, the outlet direction of one second water supply pipe 307 is from the first end to the second end, and the outlet direction of the other second water supply pipe 307 is from the second end to the first end.

[0100] Thus, when the two second water supply pipes 307 supply water simultaneously, the water in the biochemical chamber 302 forms a swirling flow under the impetus of the water discharged from the two second water supply pipes 307. The swirling water can drive at least some of the attachment structures 305 to move along with it, which is more conducive to the nitrifying bacteria attaching to each attachment structure 305 conveniently and evenly, and is also conducive to the nitrifying bacteria having more even and sufficient contact with oxygen, which is more conducive to the growth of nitrifying bacteria, thereby reducing the ammonia nitrogen content in the water more effectively.

[0101] refer to Figure 12 As shown, in some embodiments of the present invention, the oxygen supply device 400 further includes an aeration pipe 403, which is horizontally disposed at the bottom end of the biochemical tank 301. There may be one or more aeration pipes 403. When there are multiple aeration pipes, they may be arranged in a mesh structure. The top of the aeration pipe 403 is provided with multiple aeration holes. The oxygen supply pipe 401 is connected to the aeration pipe 403 for inputting oxygen into the aeration pipe 403. The oxygen discharged from the aeration holes can push at least part of the attachment structure 305 to move upward.

[0102] After the oxygen in the oxygen supply pipe 401 is discharged upward from multiple aeration holes, it can push at least some of the attachment structures 305 upward. After the attachment structures 305 move upward for a certain distance, they move downward under their own gravity, thus achieving a reciprocating rolling motion. This makes it easier and more even for nitrifying bacteria to attach to each attachment structure 305, and also makes it easier for nitrifying bacteria to have more even and sufficient contact with oxygen, which is more conducive to the growth of nitrifying bacteria and thus has a better effect on reducing the ammonia nitrogen content in the water.

[0103] refer to Figure 13As shown, in some embodiments of the present invention, the biochemical tank 301 is provided with a water collection cylinder 308, and a water outlet pipe is connected to the water collection cylinder 308. The water collection cylinder 308 has an opening communicating with the inner cavity of the biochemical tank 301, and the opening is provided with a second filter screen 309. The second filter screen 309 restricts the attachment structure 305 from passing through. The water collection cylinder 308 is provided to facilitate the rapid discharge of water treated by nitrifying bacteria in the biochemical tank 301, and the second filter screen 309 is provided to prevent the attachment structure 305 from being discharged with the water, thus avoiding waste of the attachment structure 305.

[0104] It should be noted that the biochemical tank 301 can also be equipped with a second level gauge assembly 310. The structure and installation method of the second level gauge assembly 310 can be the same as those of the first level gauge assembly 115 on the aquaculture tank 101. In addition, a gas supply pipe 501 can also be provided between the gas supply device 500 and the connecting pipe at the top of the second level gauge assembly 310. An eighth valve 311 can be provided at the top of the biochemical tank 301. Thus, similar to the aquaculture tank 101, the gas is supplied through the gas supply pipe 501 connected to the second level gauge assembly 310, and the pressure in the biochemical chamber 302 of the biochemical tank 301 can be regulated by opening and closing the eighth valve 311, so that the pressure in the biochemical chamber 302 is more suitable for the growth of nitrifying bacteria.

[0105] refer to Figures 14 to 18As shown, in some embodiments of the present invention, the closed-loop aquaculture system further includes a filtration device 600, which includes a housing 601, a filter cartridge 606, and a water outlet assembly 607. The housing 601 has an inlet chamber 602 and a purified water chamber 603 formed inside, separated from each other. The inlet chamber 602 has an inlet 604 connected to a water circulation pipe 200, through which water requiring filtration is supplied. The purified water chamber 603 has an outlet 605 connected to the water circulation pipe 200, through which filtered water is discharged into the water circulation pipe 200. The filter cartridge 606 can be cylindrical and can be entirely located within the water purification chamber 603. There can be one or more filter cartridges 606. One end of each filter cartridge 606 is open and connected to the inlet chamber 602. The sidewalls of the filter cartridge 606 can be fitted with a filter membrane or other suitable filtration structure. The outlet assembly 607 includes a movable part 608, a sliding part 609, a wastewater pipe 610, and an elastic element 611. The movable part 608 is movably disposed within the housing 601. The movable part 608 can move in various ways, such as rotating or moving. The sliding part 609 is slidably connected to the movable part 608. The sliding direction of the sliding part 609 can be parallel to the length direction of the filter cartridge 606. The wastewater pipe 610 is connected to the sliding part 609. The elastic element 611 is disposed between the movable part 608 and the sliding part 609. The movable part 608 is movable to connect or disconnect the sewage pipe 610 from the filter cartridge 606. When the sewage pipe 610 is connected to the filter cartridge 606, the elastic force of the elastic member 611 causes the sliding part 609 to have a sliding tendency. This sliding tendency causes the sewage pipe 610 on the elastic member 611 to have a tendency to move towards the filter cartridge 606.

[0106] In this invention, when water needs to be filtered, the movable part 608 is adjusted to separate the wastewater pipe 610 from the open end of the filter cartridge 606. The water to be filtered enters the inlet chamber 602 through the inlet 604, then enters the filter cartridge 606 through the open end, is filtered by the filter cartridge 606, and enters the clean water chamber 603, finally being discharged from the outlet 605. When the filter cartridge 606 needs to be cleaned, the movable part 608 is adjusted to connect the wastewater pipe 610 to the open end of the filter cartridge 606, thereby opening the inner cavity of the filter cartridge 606 to the atmosphere. The pressure in the clean water chamber 603 will be greater than the pressure in the filter cartridge 606. This pressure difference causes the water in the clean water chamber 603 to flow back into the filter cartridge 606, thus cleaning the filter cartridge 606. The wastewater generated during cleaning is discharged through the wastewater pipe 610.

[0107] According to the filtration device 600 of the present invention, when cleaning the filter cartridge 606, the sewage pipe 610 is connected to the filter cartridge 606. Through the elastic force of the elastic member 611, the sliding part 609 can have a sliding tendency to drive the sewage pipe 610 to move closer to the filter cartridge 606. However, since the sewage pipe 610 is blocked, it cannot move in the direction closer to the filter cartridge 606, but only has a tendency to move. The sewage pipe 610 is continuously subjected to the elastic force of the elastic member 611, which can make the connection between the sewage pipe 610 and the filter cartridge 606 tighter, thereby improving the cleaning effect of the filter cartridge 606.

[0108] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, the sewage pipe 610 is provided with an inlet end 612, the housing 601 is provided with a partition 613 and the partition 613 is used to separate the inlet chamber 602 and the clean water chamber 603. The partition 613 is provided with a connecting port 614 that connects the inlet chamber 602 and the filter cartridge 606. The elastic force of the elastic member 611 makes the inlet end 612 fit tightly against the end face of the partition 613. The movable part 608 can move to make the inlet end 612 connect or separate from the connecting port 614.

[0109] In this embodiment, a partition 613 is provided to better separate the water inlet chamber 602 and the clean water chamber 603. Moreover, the elastic force of the elastic element 611 causes the sewage pipe 610 to tend to move towards the partition 613, thereby ensuring that the water inlet end 612 of the sewage pipe 610 is always in close contact with the end face of the partition 613. Thus, when the filter cartridge 606 is filtering, unfiltered water in the water inlet chamber 602 can be prevented from directly entering the sewage pipe 610 through the gap between the sewage pipe 610 and the partition 613, thus reducing the filtration effect. When cleaning the filter cartridge 606, the connection between the water inlet end 612 of the sewage pipe 610 and the connecting port 614 can be made tighter, and thus the connection with the filter cartridge 606 can be made tighter, resulting in a better cleaning effect for the filter cartridge 606.

[0110] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, during the movement of the movable part 608, the water inlet end 612 moves in a direction parallel to the end face of the partition 613. With this arrangement, when the movable part 608 moves and drives the water inlet end 612 of the sewage pipe 610 to move, the water inlet end 612 of the sewage pipe 610 is always in close contact with the end face of the partition 613, which improves practicality.

[0111] refer to Figure 18 and Figure 19As shown, in some embodiments of the present invention, the water outlet assembly 607 further includes an elastic ring 615. The elastic ring 615 has a connecting groove, which extends circumferentially along the elastic ring 615 to form an annular shape. The side of the water inlet end 612 near the partition plate 613 is inserted into the connecting groove. The elastic ring 615 can be made of elastic rubber or elastic plastic. The side of the water inlet end 612 near the partition plate 613 is provided with the elastic ring 615, and the water inlet end 612 elastically abuts against the end face of the partition plate 613 through the elastic ring 615, thereby improving the sealing effect between the water inlet end 612 and the partition plate 613.

[0112] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, multiple filter cartridges 606 are provided, and the multiple filter cartridges 606 are parallel to each other. The movable part 608 is movable enough to connect the sewage pipe 610 to different filter cartridges 606. For example, the partition 613 can be provided with a connection port 614 for each filter cartridge 606, and the same end of the multiple filter cartridges 606 is connected to the partition 613. In this embodiment, the use of multiple filter cartridges 606 results in better water filtration effect, higher filtration efficiency, and better practicality.

[0113] refer to Figures 15 to 18 As shown, in some embodiments of the present invention, the movable part 608 is rotatably disposed on the housing 601. The rotation axis of the movable part 608 is parallel to the length direction of the filter cartridge 606. The filter cartridge 606 includes at least two groups. Each group of filter cartridges 606 includes multiple filter cartridges 606 arranged circumferentially along the rotation axis. The distance between the filter cartridges 606 in different groups and the rotation axis is different. The sewage pipe 610 is provided with an inlet end 612 corresponding to each group of filter cartridges 606. The movable part 608 can rotate to make the inlet end 612 sequentially connected to the multiple filter cartridges 606 in the corresponding group. For example, the filter cartridge 606 may include two groups, each group of filter cartridges 606 including multiple filter cartridges 606. The multiple filter cartridges 606 in the same group can be evenly arranged circumferentially along the rotation axis of the movable part 608. The distance between the centerline of the filter cartridges 606 in different groups and the rotation axis of the movable part 608 is different. The sewage pipe 610 can be provided with a water inlet end 612 for each group of filter cartridges 606. The distance between the two water inlet ends 612 and the rotation axis of the movable part 608 is different. When the movable part 608 rotates, one water inlet end 612 is connected to the multiple filter cartridges 606 in one group in sequence, and the other water inlet end 612 is connected to the multiple filter cartridges 606 in another group in sequence. In this way, at least two filter cartridges 606 can be cleaned at the same time, thereby improving the cleaning efficiency and cleaning effect of the filter cartridges 606.

[0114] It should be noted that in some other embodiments of the present invention, multiple filter cartridges 606 may be arranged in a circle around the rotation axis of the movable part 608, and the movable part 608 may be rotated to connect the sewage pipe 610 with the multiple filter cartridges 606 in sequence.

[0115] refer to Figures 14 to 18 As shown, in some embodiments of the present invention, the movable part 608 is configured as a rotating shaft, and the water outlet assembly 607 further includes a drive motor 616. The drive motor 616 is disposed in the housing 601 and connected to the rotating shaft to drive the rotating shaft to rotate. For example, the drive motor 616 can be disposed on the side of the water purification chamber 603 away from the water inlet chamber 602, and a sleeve can be provided inside the water purification chamber 603, through which the rotating shaft passes. When the drive motor 616 is started, the drive motor 616 can drive the rotating shaft to rotate, and the rotating shaft can thus drive the sewage pipe 610 to move, resulting in a higher degree of automation, more convenient operation, and greater time and labor savings.

[0116] refer to Figure 20 As shown, in some embodiments of the present invention, the rotating shaft is provided with a first connecting portion 617, the sliding portion 609 includes a sliding sleeve 618 and a connecting sleeve 619, the sliding sleeve 618 is fitted on the outside of the rotating shaft, the sliding sleeve 618 is connected to a second connecting portion 620, the elastic element 611 is set as a helical spring, the helical spring is fitted on the outside of the sliding sleeve 618, the two ends of the helical spring are respectively connected to the first connecting portion 617 and the second connecting portion 620, the connecting sleeve 619 is fitted on the outside of the helical spring, the connecting sleeve 619 is connected to the second connecting portion 620, and the sewage pipe 610 is connected to the connecting sleeve 619. For example, the first connecting part 617 can be a plate-like structure and connected to the end face of the shaft end. The sliding sleeve 618 can be fitted onto the outer side wall of the shaft end. The second connecting part 620 can be connected to the end of the sliding sleeve 618 away from the first connecting part 617. One end of the connecting sleeve 619 can be sealed to the second connecting part 620, and the other end can be sealed to the sewage pipe 610. The helical spring can be located in the gap between the connecting sleeve 619 and the sliding sleeve 618.

[0117] In this embodiment, the elastic element 611 is set as a helical spring, which makes installation easier and generates greater elastic force. The sliding part 609 is fitted onto the outside of the rotating shaft through the sliding sleeve 618, making the sliding part 609 slide more precisely and preventing the sewage pipe 610 from swinging. This, in turn, makes the connection between the water inlet end 612 of the sewage pipe 610 and the filter cartridge 606 tighter. In addition, the helical spring is located between the connecting sleeve 619 and the sliding sleeve 618, which can prevent water in the water inlet chamber 602 from contacting the helical spring and corroding it, thus making the helical spring have a longer service life and better practicality.

[0118] It should be noted that the elastic element 611 can also be other suitable structures, such as a disc spring.

[0119] refer to Figures 14 to 18As shown, in some embodiments of the present invention, the water outlet assembly 607 further includes a drain pipe 621, which is disposed on the housing 601 and equipped with a ninth valve 622. The sewage pipe 610 has an outlet end 623, which is rotatably connected to the drain pipe 621. For example, when the water inlet chamber 602 is located below the clean water chamber 603 and the filter cartridge 606 extends vertically, the drain pipe 621 can be disposed at the bottom end of the housing 601, the ninth valve 622 can be an automatic valve or a manual valve, and the outlet end 623 of the sewage pipe 610 is rotatably connected to and sealed with the drain pipe 621.

[0120] In this embodiment, the outlet end 623 of the sewage pipe 610 is rotatably connected to the drain pipe 621. Water discharged from the sewage pipe 610 is discharged through the drain pipe 621, which can be fixedly installed on the housing 601 and does not need to rotate with it. This not only makes the installation of the drain pipe 621 more convenient but also avoids interference between the drain pipe 621 and external components. A ninth valve 622 is provided. When the filter cartridge 606 is filtering water, the ninth valve 622 is closed. When the filter cartridge 606 needs to be cleaned, the ninth valve 622 is opened, making the operation simple and convenient.

[0121] refer to Figure 1 As shown, in some embodiments of the present invention, the oxygen supply device 400 is configured as an oxygen generator, and the closed-loop aquaculture system further includes a heat exchange pipeline 700 for transporting a heat exchange medium. The heat exchange medium can be water, heat transfer oil, or other suitable media. The heat exchange pipeline 700 has a first section 701 and a second section 702. The first section 701 is connected to the oxygen generator and can be close to the compressor or other heat-generating components of the oxygen generator. The second section 702 is connected to the biochemical tank 301 and / or the water circulation pipeline 200. For example, the biochemical tank 301 can be connected to the second section 702, the water circulation pipeline 200 can be connected to the second section 702, or both the biochemical tank 301 and the water circulation pipeline 200 can be connected to the second section 702. When the heat exchange medium passes through the first section 701, it can absorb the heat generated by the oxygen generator. When the heat exchange medium passes through the second section 702, it can exchange heat with the water in the biochemical tank 301 and / or the water circulation pipeline 200.

[0122] In this embodiment, the first section 701 of the heat exchange pipeline 700 can be close to the heat-generating components such as the compressor of the oxygenator, and the second section 702 of the heat exchange pipeline 700 can be close to the water in the biochemical tank 301 and / or the water circulation pipeline 200. In cold weather, when the heat exchange medium in the heat exchange pipeline 700 passes through the first section 701, it can absorb the heat generated during the operation of the oxygenator. After absorbing heat, the heat exchange medium passes through the second section 702 and can exchange heat with the water in the biochemical tank 301 and / or the water circulation pipeline 200, thereby heating the water. The heated water re-enters the aquaculture device 100 through the water circulation pipeline 200, which can reduce the loss of appetite or even death of aquatic products due to low water temperature. This invention utilizes the heat generated during the operation of the oxygenator to heat the water, eliminating the need for additional heating devices, resulting in lower economic costs and greater energy efficiency.

[0123] It should be noted that the oxygen supply device 400 can also be other equipment, such as multiple oxygen cylinders or a central oxygen supply system.

[0124] refer to Figure 1 As shown, in some embodiments of the present invention, the two ends of the first segment 701 are connected to conveying segments 703, and the other ends of the two conveying segments 703 are respectively connected to the two ends of the second segment 702. A third segment 704 is connected between the two conveying segments 703. The closed-loop aquaculture system also includes a refrigeration device 800, which is connected to the third segment 704. The refrigeration device 800 is used to cool the heat exchange medium passing through the third segment 704. In hot weather, aquatic products may experience reduced appetite or even death due to excessively high water temperatures. In this embodiment, the connection between the first section 701 and the conveying section 703 can be disconnected, so that the conveying section 703 is connected to the third section 704. The heat exchange medium will flow through the third section 704, and the refrigeration device 800 can cool the heat exchange medium that has passed through the third section 704. When the cooled heat exchange medium passes through the second section 702, it can absorb heat and cool the water in the biochemical tank 301 and / or the water circulation pipe 200. The cooled water re-enters the aquaculture device 100 through the water circulation pipe 200, which can reduce the aquatic products from having a reduced appetite or even dying due to excessively high water temperature, and has better practicality.

[0125] It should be noted that the refrigeration unit 800 can be a Stirling refrigerator, a vapor compression refrigerator, or other suitable refrigeration unit 800, which will not be elaborated here. To control the flow direction of the heat exchange medium, a valve can be installed at the end of the conveying section 703 near the first section 701, and valves can be installed at both ends of the third section 704. Furthermore, a second pump for driving the flow of the heat exchange medium can be installed on the heat exchange pipeline 700.

[0126] refer to Figure 1As shown, in some embodiments of the present invention, the second segment 702 is disposed within the biochemical chamber 302. In this embodiment, the second segment 702 is disposed within the biochemical chamber 302, thereby enabling the water within the biochemical chamber 302 to be heated or cooled. The heated or cooled water can then return to the aquaculture device 100 through the water circulation pipe 200. The placement of the second segment 702 within the biochemical chamber 302 not only facilitates installation but also improves the effectiveness of heating or cooling the water.

[0127] In some embodiments of the present invention, the second segment 702 is wound around the outside of the water circulation pipe 200. For example, the second segment 702 can be spiral-shaped and wound around the outside of the water circulation pipe 200. When water passes through the water circulation pipe 200 inside the second segment 702, the heat exchange medium can heat or cool the water. The heated or cooled water can then return to the aquaculture device 100 through the water circulation pipe 200. The second segment 702 being wound around the outside of the water circulation pipe 200 not only facilitates installation, but also eliminates the need for the second segment 702 to pass through the biochemical device 300 or the disinfection device 900, resulting in better sealing of the biochemical device 300 or the disinfection device 900.

[0128] In some embodiments of the present invention, the second segment 702 is wound around one end of the water circulation pipe 200 near the first water inlet pipe 104. After the water is purified, it is heated or cooled and can be quickly returned to the aquaculture device 100, thereby reducing the influence of the external ambient temperature on the heated or cooled water.

[0129] refer to Figure 1 As shown, in some embodiments of the present invention, the closed-loop aquaculture system further includes a disinfection device 900, which has a disinfection chamber, and the water circulation pipeline 200 is connected to the disinfection chamber. When water passes through the disinfection chamber, the disinfection device 900 can disinfect the water. It should be noted that the disinfection device 900 can be an ultraviolet disinfection device, or it can be disinfected by introducing disinfectant into the disinfection chamber, which will not be elaborated here.

[0130] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A closed-loop aquaculture system, characterized in that, include: Aquaculture apparatus includes an aquaculture tank and a feeding assembly. The aquaculture tank forms an aquaculture cavity and is provided with a first water inlet pipe and a first water outlet pipe. The feeding assembly is located in the aquaculture tank for feeding the aquaculture cavity. A water circulation pipeline is located between the first inlet pipe and the first outlet pipe; A biochemical device includes a biochemical tank, the biochemical tank forming a biochemical cavity, the biochemical cavity being connected to the water circulation pipeline, and the biochemical cavity being used to contain nitrifying bacteria; An oxygen supply device is connected to the aquaculture tank and the biochemical tank to supply oxygen to the aquaculture chamber and the biochemical chamber. An air supply device is provided with an air delivery pipe between itself and the aquaculture tank to deliver gas into the aquaculture chamber and regulate the pressure inside the aquaculture chamber. Filtering device, the filtering device comprising: The shell has an inlet chamber and a clean water chamber inside. The inlet chamber is provided with an inlet, and the clean water chamber is provided with an outlet. The inlet and outlet are connected to the water circulation pipeline. A filter cartridge is disposed inside the water purification chamber, with one end of the filter cartridge open and connected to the water inlet chamber; The water outlet assembly includes a movable part, a sliding part, a sewage pipe, and an elastic element. The movable part is movably disposed on the housing, the sliding part is slidably connected to the movable part, the sewage pipe is connected to the sliding part, and the elastic element is disposed between the movable part and the sliding part. The movable part is movable to connect or disconnect the sewage pipe from the filter cartridge, and when the sewage pipe is connected to the filter cartridge, the elastic force of the elastic member causes the sliding part to have a sliding tendency to drive the sewage pipe closer to the filter cartridge. The movable part is rotatably mounted on the housing. The rotation axis of the movable part is parallel to the length direction of the filter cartridge. The filter cartridge includes at least two groups. Each group of filter cartridges includes multiple filter cartridges arranged circumferentially along the rotation axis. The distance between the filter cartridges in different groups and the rotation axis is different. The sewage pipe is provided with an inlet end corresponding to each group of filter cartridges. The movable part can rotate to make the inlet end connect sequentially with the multiple filter cartridges in the corresponding group.

2. The closed-loop aquaculture system according to claim 1, characterized in that, The feeding component includes: A feeding tube is located at the top of the breeding tank and connects to the breeding chamber. The top of the feeding tube is provided with a first valve, and the bottom of the feeding tube is provided with a second valve. The feeding tube forms a storage chamber between the first valve and the second valve. A pressure regulating mechanism is provided in the feeding cylinder to regulate the air pressure in the storage chamber.

3. The closed-loop aquaculture system according to claim 2, characterized in that, The pressure regulating mechanism includes: A first regulating pipe, one end of which is connected to the feeding tube and communicates with the storage chamber, and the other end is used to communicate with the atmosphere; the first regulating pipe is equipped with a third valve. The second regulating pipe has one end connected to the feeding tube and in communication with the storage chamber, and the other end connected to the breeding tank and in communication with the breeding chamber. The second regulating pipe is equipped with a fourth valve.

4. The closed-loop aquaculture system according to any one of claims 1 to 3, characterized in that, The first water outlet pipe is located at the middle of the bottom of the aquaculture tank. There are two first water inlets, which are respectively connected to the two ends of the aquaculture tank along its length. The two first water inlets are located on opposite sides of the aquaculture tank along its length projection. When the two first water inlets supply water at the same time, the water in the aquaculture chamber forms a swirling flow under the push of the water discharged from the two first water inlets.

5. The closed-loop aquaculture system according to claim 4, characterized in that, The two ends of the aquaculture tank along its length are respectively connected to a first water supply pipe, and the first water inlet pipe and the first water supply pipe at the same end of the aquaculture tank are respectively located on opposite sides of the aquaculture tank. When the two first water supply pipes supply water at the same time, the water in the aquaculture chamber forms a swirling flow under the push of the water discharged from the two first water supply pipes.

6. The closed-loop aquaculture system according to any one of claims 1 to 3, characterized in that, The aquaculture device further includes a first liquid level gauge assembly, the first liquid level gauge assembly comprising: Level gauge body; The first connecting pipe is connected to the top of the liquid level gauge body, one end of the first connecting pipe is connected to the aquaculture tank and communicates with the aquaculture chamber, and the gas supply pipe is connected to the first connecting pipe. The second connecting pipe is connected to the bottom end of the liquid level gauge body, and the second connecting pipe is connected to the aquaculture tank and communicates with the aquaculture chamber.

7. The closed-loop aquaculture system according to any one of claims 1 to 3, characterized in that, The biochemical tank is equipped with a second inlet pipe and a second outlet pipe connected to the water circulation pipeline. The biochemical device also includes multiple attachment structures, which are movably accommodated within the biochemical chamber. These attachment structures provide attachment points for nitrifying bacteria. The second inlet pipe is connected to the bottom end of the biochemical tank, and the outlet direction of the second inlet pipe is upward, so that the water discharged from the second inlet pipe can push at least part of the attachment structure upward; or, The second water inlet pipe is provided in two parts and is respectively connected to both ends of the biochemical tank along the length direction. The connection positions of the two second water inlet pipes to the biochemical tank along the length direction are respectively located on opposite sides of the biochemical tank. When the two second water inlet pipes supply water at the same time, the water in the biochemical tank forms a swirling flow under the push of the water discharged from the two second water inlet pipes, so as to drive at least part of the attachment structure to move.

8. The closed-loop aquaculture system according to any one of claims 1 to 3, characterized in that, The oxygen supply device is configured as an oxygen generator, and the closed-loop aquaculture system further includes: A heat exchange pipeline for transporting heat exchange medium, the heat exchange pipeline having a first section and a second section, the first section being connected to the oxygen generator, and the second section being connected to the biochemical tank and / or the water circulation pipeline; The heat exchange medium can absorb the heat generated by the oxygen generator when it passes through the first section, and can exchange heat with the water in the biochemical tank and / or the water circulation pipeline when it passes through the second section.

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