Shrimp larvae breeding pond water temperature control device

Abstract

This utility model relates to a water temperature control device for shrimp larvae breeding ponds, comprising a temperature sensing unit and a microjet temperature equalization unit, both of which are electrically connected to a controller. The temperature sensing unit, through a self-calibrating flexible thermally sensitive film that can be attached to the pond bottom, pond walls, and temperature measuring bracket, enables precise, all-around, and blind-spot-free temperature measurement of the water within the breeding tank. The microjet temperature equalization unit, through microjet tubes arranged at different levels (upper, middle, and lower), achieves vertical water circulation. Simultaneously, each level of microjet tube is equipped with a ring of microjet nozzles, which are angled to form a horizontal circulation, achieving multi-level horizontal circulation superposition, increasing horizontal water mixing, and ultimately achieving rapid and uniform mixing of the water in all directions. This device also enables water circulation and all-around oxygen supply, integrating multiple functions such as all-around water temperature sensing, uniform regulation, water circulation, and oxygen supply.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture water temperature control technology, specifically to a water temperature control device for shrimp larvae breeding ponds. Background Technology

[0002] The requirements for water temperature are extremely stringent during shrimp larval breeding. Water temperature is not only a core environmental factor regulating the metamorphosis rate, survival rate, and developmental synchronicity of larvae, but it also directly determines the economic output of the entire breeding cycle. Once the water temperature deviates from the suitable range, whether too high or too low, it will quickly trigger a chain reaction of feeding stagnation, immunosuppression, and even mass mortality. Therefore, achieving precise control of water temperature has become one of the most technically challenging aspects of shrimp larval breeding.

[0003] However, current breeding practices for water temperature control remain at the level of experience and local optimization, resulting in systemic blind spots. Temperature measurement generally relies on point probes, which only reflect the instantaneous temperature at a fixed point in the water, neglecting the true thermal field distribution of microenvironments such as areas where larvae densely attach, the walls of aeration pipes, and dead corners of the pool. These areas often become breeding grounds for larval stress, deformities, and even death. On the temperature regulation side, the localized overcooling / overheating caused by traditional electric heating rods or chillers, lacking a dynamic temperature equalization mechanism, often leads to larval aggregation due to temperature tropism, further exacerbating the combined effects of heat stress and mechanical damage.

[0004] To overcome these bottlenecks, the industry has attempted to introduce advanced technologies such as infrared thermal imagers and fiber optic distributed temperature measurement in recent years. While these technologies can reconstruct two-dimensional and three-dimensional thermal fields, their high cost and complex operation and maintenance make them difficult to implement in industrial applications. Traditional temperature probes are also subject to long-term contamination from biofilms, Fe²⁺, and H₂S, resulting in daily drift and low readings. Even with protective measures such as copper alloy anti-fouling covers or electrolytic brushes, they still face challenges such as structural redundancy, soaring energy consumption, and short lifespans. In terms of temperature regulation, whether it's in-pool coiling, geothermal pipe laying, microporous aeration mixing, direct mixing from risers, or mechanical impeller propulsion, all methods suffer from inherent defects such as large mixing dead zones, uneven mixing, and high rates of mechanical damage to larvae.

[0005] Therefore, there is an urgent need for a water temperature control technology for shrimp larvae breeding ponds that can perform all-round, blind-zone-free thermal field sensing and achieve uniform regulation of mixed hydrothermal gradient. Summary of the Invention

[0006] To solve the above problems, this utility model provides a water temperature control device for shrimp larvae breeding ponds, including a breeding tank and a controller. The breeding tank is equipped with a temperature sensing unit and a micro-jet temperature equalization unit; both the temperature sensing unit and the micro-jet temperature equalization unit are electrically connected to the controller. The temperature sensing unit includes a temperature measuring bracket, which is located in the center of the breeding box and is arranged along the axial direction of the breeding box. The inner wall of the breeding box is detachably equipped with multiple side wall micro-jet tubes, and the bottom end of the inner wall of the breeding box is detachably equipped with a bottom micro-jet tube. The bottom micro-jet tube has a vortex structure and is connected to the bottommost side wall micro-jet tube through a pipe. The temperature measuring bracket is fixedly connected to an upper temperature measuring component, a middle temperature measuring component, and a lower temperature measuring component. The upper temperature measuring component, the middle temperature measuring component, and the lower temperature measuring component are located near the top, center, and bottom of the breeding box, respectively. The lower temperature measuring component is located on the upper side of the bottom microjet tube. The upper, middle, and lower temperature measuring components each include multiple crossbars, which are arranged in a circular array around the axis of the temperature measuring bracket. Each crossbar has multiple self-calibrating flexible thermal film stickers detachably connected to its outer end. The self-calibrating flexible thermal film stickers are electrically connected to the controller. Multiple jet holes are provided at the end of the side wall microjet tube and the bottom microjet tube near the top of the breeding box, and each jet hole is threaded with a microjet nozzle. The micro-jet nozzles on the side wall micro-jet tubes are set at an angle of 15 to 45 degrees along the cross-section passing through the axis of the breeding box and the cross-section perpendicular to the axis of the breeding box, and at an angle of 20 to 35 degrees with the tangent of the inner wall of the breeding box. The nozzles of the micro-jet nozzles on the bottom micro-jet tube are all set vertically upwards; A water-absorbing ring is slidably connected to the inner wall of the breeding box near its top, and multiple water-absorbing holes are opened at the bottom of the water-absorbing ring. Multiple sidewall microjet tubes are connected by a connecting pipe. The water suction ring and the uppermost sidewall microjet tube are connected by a water suction pipe, and a water pump is installed on the water suction pipe. The water pump is electrically connected to the controller. The bottommost sidewall microjet tube is connected to an external air supply system via an air supply pipe. The air supply pipe is equipped with a solenoid valve, which is electrically connected to the controller.

[0007] The breeding box can be a cylindrical, square, or polygonal column structure, and can be made of one of the following: concrete, brick masonry, fiberglass, or plastic.

[0008] Both the temperature measuring bracket and the crossbar are made of stainless steel, and the bottom of the temperature measuring bracket can be detachably fixed to the bottom center of the breeding box.

[0009] Both the side wall micro-jet tubes and the bottom micro-jet tubes are made of PE pipes, and the shape of the side wall micro-jet tubes can be adjusted according to the shape of the breeding tank.

[0010] The water-absorbing ring is made of PE pipe, and its shape can be adjusted according to the shape of the breeding box. The outer wall of the water-absorbing ring is covered with foam.

[0011] Each water intake hole is equipped with filter material, which is either filter cotton or filter screen, and the pores of the filter material are smaller than those of shrimp larvae.

[0012] The water suction pipe is a flexible hose, and the bottom of the breeding box is equipped with a drain outlet.

[0013] The micro-jet nozzle has a short plug structure and is made of polyvinylidene fluoride. The micro-jet nozzle includes a water inlet, a central jet hole that contracts and then expands, and a water outlet. The water inlet is connected to the jet hole. The micro-jet nozzle is equipped with a micro-motion solenoid valve to control the on and off of the micro-jet nozzle. The micro-motion solenoid valve is electrically connected to the controller.

[0014] The self-calibrating flexible thermal film patch includes a flexible substrate, a thermistor layer on the front side of the flexible substrate, at least two standard resistor units on the same layer of the thermistor layer, a flexible insulating layer and a waterproof encapsulation layer on top of the thermistor layer and the standard resistor units, and a pressure-sensitive adhesive layer on the back side of the flexible substrate.

[0015] Both the flexible substrate and the flexible insulation layer are polyimide films; the waterproof encapsulation layer is a polyethylene terephthalate film with an outer acrylic waterproof coating; the pressure-sensitive adhesive layer is a water-based silicone-modified acrylic pressure-sensitive adhesive; and the self-calibrating flexible thermal film is attached to the outer end of the crossbar and the inner wall and bottom of the aquaculture tank through the pressure-sensitive adhesive layer.

[0016] Compared with the prior art, this application has the following beneficial effects: The self-calibrating flexible thermal film patch in the temperature sensing unit can be attached to different parts of the pool bottom, pool wall, and crossbar of the temperature measuring rod, realizing all-round, blind-spot-free temperature measurement of the aquaculture water. Its built-in calibration function can achieve accurate temperature measurement.

[0017] The water mixing is achieved through multiple layers of sidewall microjet tubes and vortex-shaped bottom microjet tubes.

[0018] By drawing water from the upper layer into the lower layer and then ejecting it through a micro-jet nozzle, the water temperature difference can be reduced to below the threshold in a short time, effectively reducing stress response in shrimp larvae.

[0019] By connecting the temperature sensing unit and the microjet temperature equalization unit to the controller, closed-loop management of water temperature control is achieved.

[0020] By adjusting the power of the water pump and the on / off state of the micro-jet nozzle, the conversion between water circulation and rapid water mixing can be achieved.

[0021] By connecting with an external air supply system, the microjet tube can also achieve all-round oxygen supply to the water body, integrating multiple functions such as all-round water temperature sensing, uniform regulation, water circulation, and oxygen supply. Attached Figure Description

[0022] Figure 1 This is a triaxial view of this application; Figure 2 This is a top view of this application; Figure 3 This is an exploded view of the entire application; Figure 4 This is a front view of this application; Figure 5 For the purposes of this application Figure 4 FF section view; Figure 6 For the purposes of this application Figure 5 Middle GG sectional view; Figure 7 For the purposes of this application Figure 5 Enlarged view of point A in the middle; Explanation of the labels in the diagram: 1. Breeding box; 2. Temperature measuring bracket; 3. Side wall micro-jet tube; 4. Bottom micro-jet tube; 5. Upper temperature measuring component; 6. Middle temperature measuring component; 7. Lower temperature measuring component; 8. Crossbar; 9. Self-calibrating flexible thermal film patch; 10. Jet hole; 11. Micro-jet nozzle; 12. Water suction ring; 13. Water suction hole; 14. Connecting pipe; 15. Water suction pipe; 16. Water pump; 17. Air supply pipe. Detailed Implementation

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 like Figure 1-6 As shown, this embodiment provides a water temperature control device for a shrimp larvae breeding pond, including a culture tank 1 and a controller. The culture tank 1 is equipped with a temperature sensing unit and a microjet temperature equalization unit; both the temperature sensing unit and the microjet temperature equalization unit are electrically connected to the controller. The breeding box 1 can be a cylindrical, square, or polygonal column structure, and the breeding box 1 can be made of one of the following: concrete, brick masonry, fiberglass, or plastic.

[0025] The temperature sensing unit includes a temperature measuring bracket 2, which is located in the center of the breeding box 1 and is arranged along the axial direction of the breeding box. The bottom end of the temperature measuring bracket 2 is detachably fixed to the bottom center of the breeding box 1.

[0026] The temperature measuring bracket 2 is fixedly connected to the upper temperature measuring component 5, the middle temperature measuring component 6 and the lower temperature measuring component 7. The upper temperature measuring component 5, the middle temperature measuring component 6 and the lower temperature measuring component 7 are respectively close to the top, center and bottom of the breeding box.

[0027] The upper temperature measuring component 5, the middle temperature measuring component 6, and the lower temperature measuring component 7 each include multiple crossbars 8. The multiple crossbars 8 are arranged in a circular array around the axis of the temperature measuring bracket 2. The outer end of each crossbar 8 can be detachably connected to multiple self-calibrating flexible thermal film patches 9. These crossbars 8 located at different levels and in different directions provide multiple support points for the self-calibrating flexible thermal film patches 9 distributed throughout the entire aquaculture tank 1, enabling comprehensive temperature measurement of the water in different directions within the aquaculture tank 1.

[0028] The self-calibrating flexible thermal film patch 9 includes a flexible substrate, a thermistor layer on the front side of the flexible substrate, at least two standard resistor units on the same layer of the thermistor layer, a flexible insulating layer and a waterproof encapsulation layer on the upper part of the thermistor layer and the standard resistor units, and a pressure-sensitive adhesive layer on the back side of the flexible substrate.

[0029] The self-calibrating flexible thermal film patch 9 is attached to the outer end of the crossbar 8 and the inner wall and bottom of the aquaculture tank 1 via a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer is a water-based silicone-modified acrylate pressure-sensitive adhesive, which ensures that the entire self-calibrating flexible thermal film patch 9 adheres tightly to the aquaculture tank wall or the outer end of the crossbar 8, guaranteeing good thermal contact and allowing for repeated application and removal. The flexible substrate is a 50 µm polyimide (PI) film, which carries all functional layers and can be bent to adapt to various complex surfaces and dynamic deformation scenarios, achieving shape-adjustable adjustment. The thermistor layer on the front of the flexible substrate changes its resistance with water temperature. A standard resistor unit in the same layer as the thermistor has a known resistance and minimal temperature drift. The circuit measures the voltage / current ratio of the thermistor and the standard resistor sequentially at regular intervals, using the standard resistor to correct the drift of the thermistor, thereby achieving the self-calibration function. The corrected resistance value is converted to obtain the temperature value. The self-calibrating flexible thermal film patch 9 is electrically connected to the controller, and the controller receives the accurate temperature values ​​of different temperature measurement points measured by the self-calibrating flexible thermal film patch 9.

[0030] The flexible insulation layer is a 12–25 µm polyimide film, which has electrical isolation and withstand voltage >500 V. Meanwhile, the waterproof encapsulation layer is a 50 µm polyethylene terephthalate film, coated with a 3 µm fluorocarbon or acrylic waterproof coating. This flexible insulation layer and waterproof encapsulation layer isolate the resistive network from water, salt, and oxygen, making it unaffected by other external environmental factors.

[0031] Both the temperature measuring bracket 2 and the crossbar 8 are made of stainless steel, which is corrosion-resistant and easy to clean, and can be used in water for a long time.

[0032] Example 2 like Figure 1-6 As shown in Example 1, this example provides a water temperature control device for shrimp larvae breeding ponds.

[0033] The inner wall of the breeding box 1 is detachably equipped with multiple side wall micro-jet tubes 3, and the bottom end of the inner wall of the breeding box 1 is detachably equipped with a bottom micro-jet tube 4. The bottom micro-jet tube 4 has a vortex structure and is connected to the bottommost side wall micro-jet tube 3 through a pipe.

[0034] Both the side wall micro-jet tube 3 and the bottom micro-jet tube 4 are PE pipes. The shape of the side wall micro-jet tube 3 can be adjusted according to the shape of the breeding box.

[0035] Multiple jet holes 10 are provided at the end of the side wall microjet tube 3 and the bottom microjet tube 4 near the top of the breeding box 1, and each jet hole 10 is threaded with a microjet nozzle 11.

[0036] The micro-jet nozzle 11 on the side wall micro-jet tube 3 is set at an angle of 15 to 45 degrees along the cross-section passing through the axis of the breeding box 1 and the cross-section perpendicular to the axis of the breeding box 1. The micro-jet nozzle 11 is set at an angle of 20 to 35 degrees with the tangent of the inner wall of the breeding box 1.

[0037] The micro-jet nozzles 11 on the bottom micro-jet tube 4 are all set vertically upwards to spray water.

[0038] The micro-jet nozzle 11 has a short plug structure and is made of polyvinylidene fluoride. The micro-jet nozzle 11 includes a water inlet, a central jet hole that contracts and then expands, and a water outlet. The water inlet is connected to the jet hole 10. A micro-motion solenoid valve is provided on the micro-jet nozzle 11 to control the on / off state of the micro-jet nozzle 11. The micro-motion solenoid valve is electrically connected to the controller.

[0039] A water-absorbing ring 12 is slidably connected to the inner wall of the breeding box 1 near its top, and multiple water-absorbing holes 13 are opened at the bottom of the water-absorbing ring 12.

[0040] The water-absorbing ring 12 is made of PE pipe, and its shape can be adjusted according to the shape of the breeding box. The outer wall of the water-absorbing ring 12 is covered with foam, which allows the water-absorbing ring to float on the surface of the upper water and change with the water level.

[0041] Each water intake hole 13 is equipped with filter material, which is either filter cotton or filter screen. The pores of the filter material are smaller than those of the shrimp larvae, thus ensuring that the shrimp larvae are not sucked into the water intake ring 12 when water is being absorbed.

[0042] Multiple sidewall microjet tubes 3 are connected by a connecting pipe 14. The water suction ring 12 and the uppermost sidewall microjet tube 3 are connected by a water suction pipe 15. The water suction pipe 15 is a flexible hose and a water pump 16 is installed on the water suction pipe 15. The water pump 16 is electrically connected to the controller.

[0043] The controller receives and analyzes the water temperature at different locations in the aquaculture tank 1 measured by the self-calibrating flexible thermal film patch 9. When the temperature difference between these different locations exceeds the set maximum temperature difference threshold, the water pump 16, which is electrically connected to the controller, starts.

[0044] After the water pump 16 is started, the upper water is drawn into the water suction ring 12 through the water suction hole 13 on the water suction ring 12, and then enters the uppermost side wall micro-jet tube 3 through the water suction pipe 15. The water flows through multiple side wall micro-jet tubes 3 through the connecting pipe 14, and the water in the lowermost side wall micro-jet tube 3 enters the bottom micro-jet tube 4 through the pipe.

[0045] Water enters the jet hole 10 from the side wall microjet tube 3 and the bottom microjet tube 4. Each jet hole 10 is threaded with a microjet nozzle 11, and the micro-motion solenoid valve on the microjet nozzle 11 is electrically connected to the controller.

[0046] After receiving the temperature signal, the controller starts the water pump 16 and then opens the micro-jet nozzle 11 through the micro-motion solenoid valve. The high-pressure water flows into the micro-jet nozzle 11 from the water inlet. When the water flows through the central jet hole, which first contracts and then expands, the speed increases and the pressure decreases in the contraction section, and the speed decreases and the pressure rises in the expansion section. The water is thus rapidly accelerated to form a high-speed micro-jet, which is finally ejected from the water outlet. A large velocity gradient appears between the ejected high-speed micro-jet and the surrounding almost still water, forming a shear layer and thus creating a vortex. This vortex draws in the surrounding water, thus achieving mixing.

[0047] The inner wall of the breeding tank 1 is equipped with side wall micro-jet tubes 3 in the upper, middle and lower layers, and a vortex-shaped bottom micro-jet tube 4 at the bottom. After the water suction ring 12 draws in the upper layer of water, it enters the side wall micro-jet tubes 3 and the bottom micro-jet tube 4 in the upper, middle and lower layers respectively. Each side wall micro-jet tube 3 and the bottom micro-jet tube 4 is equipped with a ring of micro-jet nozzles 11 at the upper end. After the water is drawn in from the upper layer, it is transported to the upper, middle and lower layers and sprayed out from the micro-jet nozzles 11 of different layers and the bottom, thus forming a vertical circulation and breaking the natural temperature stratification between the upper and lower layers. The micro-jet nozzles 11 on the side wall micro-jet tube 3 are angled, creating a horizontal circulation when water is ejected. Meanwhile, the micro-jet nozzles 11 at the top of the bottom micro-jet tube 4 are vertically upward, pushing the bottom water upwards. The superposition of these upper, middle, and lower circulation levels enhances horizontal mixing and prevents stagnant water zones. This multi-level vertical water circulation breaks down temperature stratification, and the superposition of multiple levels of horizontal circulation ultimately achieves comprehensive mixing of the entire water body within the aquaculture tank 1, maintaining the overall water temperature within a suitable range. This allows the temperature difference to be reduced to below the minimum threshold in a short time, minimizing stress.

[0048] The self-calibrating flexible thermal film patch 9 measures the temperature of the mixed water again. When the controller receives that the temperature difference of the water is less than the minimum threshold, it reduces the power of the water pump 16, thereby reducing the flow rate per cycle and the jet velocity of the micro-jet nozzle 11. At the same time, it closes the micro-jet nozzles 11 in the upper and middle layers, allowing only the micro-jet nozzles 11 on the bottommost side wall micro-jet tube 3 and the bottom micro-jet tube 4 to operate. Within the normal temperature difference range, the water in the aquaculture tank 1 undergoes only quiet water circulation under normal conditions.

[0049] The bottommost sidewall microjet tube 3 is connected to an external air supply system via an air supply pipe 17. The air supply pipe is equipped with a solenoid valve, which is electrically connected to the controller. The oxygen required by the shrimp larvae in the aquaculture water can enter the bottommost sidewall microjet tube 3 through the air supply pipe 17, thus achieving all-round oxygen supply to the aquaculture water.

[0050] The bottom of the breeding tank is equipped with a drain outlet to discharge breeding wastewater.

[0051] During use, based on the detection results of multi-point temperature measurement, the on / off state of each micro-jet nozzle 11 can be independently controlled. By independently controlling the on / off state of multiple micro-jet nozzles 11, local temperature differences can be effectively homogenized, reducing temperature differences in microenvironments such as dense attachment areas of larvae, air pipe walls, and dead corners of the pool. This reduces larval stress, distortion, and even death, and further reduces the thermotropic aggregation of larvae caused by local overheating, thereby reducing the superposition of heat stress and mechanical damage.

[0052] Meanwhile, multi-level and multi-point water flow mixing helps to mimic the state of natural water flow, making the living environment of shrimp larvae in the culture tank closer to the natural flowing water environment; there are fewer dead zones in the mixture, the mixing is uniform, and the mechanical damage rate of larvae is low. Multi-point temperature detection effectively reduces detection blind spots; The shrimp larvae breeding pond water temperature control device provided by this utility model achieves all-round water temperature measurement through a temperature sensing unit. The self-calibrating flexible thermal film patch 9 offers advantages such as automatic calibration, variable flexibility, and repeated application / removal, enabling precise local water temperature measurement. The microjet temperature equalization unit, through multiple sidewall microjet tubes 3 arranged in different orientations and dimensions, and a vortex-shaped bottom microjet tube 4, can achieve all-round mixing of the water in the breeding tank 1, with low energy consumption and high speed, effectively reducing stress effects on shrimp larvae. Both the temperature sensing unit and the microjet temperature equalization unit are connected to a controller, realizing closed-loop management of water temperature control. Simultaneously, the device can also achieve water circulation and all-round oxygen supply during normal operation, integrating multiple functions such as all-round water temperature sensing, uniform regulation, water circulation, and oxygen supply.

[0053] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A shrimp larviculture pond water temperature control device, characterized by: It includes a breeding box (1) and a controller. The breeding box (1) is equipped with a temperature sensing unit and a micro-jet temperature equalization unit. The temperature sensing unit and the micro-jet temperature equalization unit are both electrically connected to the controller. The temperature sensing unit includes a temperature measuring bracket (2), which is located in the center of the breeding box (1) and is arranged along the axial direction of the breeding box (1); The inner wall of the breeding box (1) is detachably provided with multiple side wall micro-jet tubes (3), and the bottom end of the inner wall of the breeding box (1) is detachably provided with a bottom micro-jet tube (4). The bottom micro-jet tube (4) has a vortex structure and is connected to the bottommost side wall micro-jet tube (3) through a pipe. The temperature measuring bracket (2) is fixedly connected to an upper temperature measuring component (5), a middle temperature measuring component (6), and a lower temperature measuring component (7) at its outer end. The upper temperature measuring component (5), the middle temperature measuring component (6), and the lower temperature measuring component (7) are respectively close to the top, center, and bottom of the breeding box (1). The lower temperature measuring component (7) is located on the upper side of the bottom microjet tube (4). The upper temperature measuring component (5), the middle temperature measuring component (6), and the lower temperature measuring component (7) each include multiple crossbars (8), and the multiple crossbars (8) are arranged in a circular array around the axis of the temperature measuring bracket (2); the outer end of each crossbar (8) can be detachably connected to multiple self-calibrating flexible thermal film stickers (9); the self-calibrating flexible thermal film stickers (9) are electrically connected to the controller; The side wall micro-jet tube (3) and the bottom micro-jet tube (4) are provided with multiple jet holes (10) at the end near the top of the breeding box (1), and each jet hole (10) is threaded with a micro-jet nozzle (11). The micro-jet nozzle (11) on the side wall micro-jet tube (3) is set at an angle of 15 to 45 degrees along the cross section passing through the axis of the breeding box (1) and the cross section perpendicular to the axis of the breeding box (1), and the micro-jet nozzle (11) is set at an angle of 20 to 35 degrees with the tangent of the inner wall of the breeding box (1). The nozzles of the micro-jet nozzles (11) on the bottom micro-jet tube (4) are all set vertically upward; The inner wall of the breeding box (1) is slidably connected to a water-absorbing ring (12) near its top, and the bottom end of the water-absorbing ring (12) has multiple water-absorbing holes (13). The multiple sidewall microjet tubes (3) are connected by a connecting pipe (14), and the water suction ring (12) and the uppermost sidewall microjet tube (3) are connected by a water suction pipe (15). A water pump (16) is provided on the water suction pipe (15); the water pump (16) is electrically connected to the controller. The bottommost sidewall microjet tube (3) is connected to an external air supply system via an air supply pipe (17). The air supply pipe (17) is equipped with a solenoid valve, which is electrically connected to the controller.

2. The shrimp larviculture tank water temperature control device according to claim 1, characterized in that: The breeding box (1) can be a cylindrical, square, or polygonal column structure, and the breeding box (1) can be made of one of concrete, brick masonry, fiberglass or plastic.

3. The shrimp larviculture tank water temperature control device of claim 1, wherein: The temperature measuring bracket (2) and the crossbar (8) are both made of stainless steel. The bottom of the temperature measuring bracket (2) is detachably fixed to the bottom center of the breeding box (1).

4. The larval rearing tank water temperature control device according to claim 1, characterized by: Both the side wall microjet tube (3) and the bottom microjet tube (4) are PE tubes, and the shape of the side wall microjet tube (3) can be adjusted according to the shape of the breeding box (1).

5. The larval rearing tank water temperature control apparatus of claim 1, wherein: The water-absorbing ring (12) is a PE pipe, and its shape can be adjusted according to the shape of the breeding box (1). The outer wall of the water-absorbing ring (12) is covered with foam.

6. The larval rearing tank water temperature control apparatus of claim 1, wherein: Each of the water absorption holes (13) is provided with filter material, which is filter cotton or filter screen, and the pores of the filter material are smaller than those of shrimp larvae.

7. The larval rearing tank water temperature control apparatus of claim 1, wherein: The water suction pipe (15) is a flexible hose, and the bottom of the breeding box (1) is provided with a drain outlet.

8. The larval rearing tank water temperature control apparatus of claim 1, wherein: The micro-jet nozzle (11) is a short plug structure made of polyvinylidene fluoride. The micro-jet nozzle (11) includes a water inlet, a central jet hole that contracts and then expands, and a water outlet. The water inlet is connected to the jet hole (10). The micro-jet nozzle (11) is equipped with a micro-motion solenoid valve to control the on / off state of the micro-jet nozzle (11). The micro-motion solenoid valve is electrically connected to the controller.

9. The larval rearing tank water temperature control apparatus of claim 1, wherein: The self-calibrating flexible thermal film patch (9) includes a flexible substrate, a thermistor layer is provided on the front side of the flexible substrate, at least two standard resistor units are provided on the same layer of the thermistor layer, a flexible insulating layer and a waterproof encapsulation layer are sequentially covered on the upper part of the thermistor layer and the standard resistor units, and a pressure-sensitive adhesive layer is also provided on the back side of the flexible substrate.

10. The larval rearing tank water temperature control device according to claim 9, characterized by: The flexible substrate and the flexible insulating layer are both polyimide films; the waterproof encapsulation layer is a polyethylene terephthalate film coated with an acrylic waterproof coating; the pressure-sensitive adhesive layer is a water-based silicone-modified acrylic pressure-sensitive adhesive; the self-calibrating flexible thermal film patch (9) is attached to the outer end of the crossbar (8) and the inner wall and bottom of the aquaculture box (1) through the pressure-sensitive adhesive layer.

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