A cooling and oxygenation system for hydroponic planting equipment

Abstract

The present invention provides a cooling and oxygenation system for a hydroponic planting device, comprising a hydroponic planting device body having a water tank and a water return port, wherein an air duct is further arranged inside the hydroponic planting device body, and nutrient solution sequentially passes through the water return port and the air duct and falls into the water tank; the air duct comprises an air inlet and an air outlet, and a fan is arranged inside the air duct and beside the air inlet; air is driven by the fan to enter the air duct from the air inlet, and flows out from the air outlet after contacting the nutrient solution falling into the air duct; the water tank is located at the bottom of the hydroponic planting device body. The cooling and oxygenation system for a hydroponic planting device has the dual effects of effectively increasing the dissolved oxygen content in the hydroponic nutrient solution and reducing the temperature of the nutrient solution.

Description

Technical Field

[0001] The present invention relates to the technical field of hydroponic planting, and in particular to a cooling and oxygenation system for a hydroponic planting device. Background Art

[0002] Plant hydroponics is an increasingly popular planting method among families and gardening enthusiasts. Hydroponics uses nutrient solution to replace soil, and plant roots have high requirements for the temperature and dissolved oxygen of the nutrient solution. Temperature conditions are an important factor affecting root absorption, which not only affects the absorption capacity of the root system, but also affects the effectiveness of nutrients in the nutrient solution. Within a certain temperature range, the higher the temperature, the more water the root system absorbs. This is because when the temperature is high, the transpiration is strong, which leads to an increase in plant water absorption. However, the plant root system has a narrow range of adaptation to temperature, so giving the root system a suitable temperature during growth and development is of great significance for the absorption of water and nutrients. If the root temperature is too high and exceeds the upper limit of the suitable temperature, it will cause the root system to breathe too vigorously, not only consuming a lot of sugar, but also reducing oxygen and increasing carbon dioxide, causing metabolic disorders in the root system, premature aging, and hindering the absorption of water and nutrients by the plant. Take lettuce as an example. Choose early-maturing, heat-resistant, and bolting-resistant varieties, such as butter lettuce and romaine lettuce. The suitable temperature range of the nutrient solution is 15-20°C. If it exceeds 30°C, it will grow poorly. However, three-dimensional hydroponics of plants will inevitably use a pumping device, usually a submersible pump. The submersible pump will heat the nutrient solution during operation, causing the nutrient solution temperature to rise, which in turn affects the growth of hydroponic plants.

[0003] In addition, the nutrient solution needs to be added regularly, and the nutrient solution container also needs to be cleaned regularly. For the existing vertical planting system with a water tank, when cleaning the water tank, the plants above the water tank and the corresponding supporting structure need to be moved away, so there are many inconveniences during cleaning. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to increase oxygen and reduce the temperature of the nutrient solution in the water tank.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A cooling and oxygenation system for a hydroponic planting device, comprising a hydroponic planting device body including a water tank and a water return port, wherein an air duct is further arranged inside the hydroponic planting device body, and nutrient solution from the water return port passes through the air duct and then falls into the water tank; the air duct comprises an air inlet and an air outlet, and a fan is arranged in the air duct beside the air inlet; air is driven by the fan to enter the air duct from the air inlet, and flows out from the air outlet after contacting the nutrient solution falling into the air duct; the water tank is located at the bottom of the hydroponic planting device body.

[0007] Furthermore, the water flow direction is vertically downward; when the air contacts the nutrient solution, the angle between the air flow direction and the water flow direction is α, 80°≤α≤100°.

[0008] Furthermore, when the air contacts the nutrient solution, the air flow direction and the water flow direction are perpendicular to each other.

[0009] Furthermore, the water tank comprises a containing cavity for loading nutrient solution and a water tank shell for supporting the containing cavity, and the top end surface of the water tank shell is open; the containing cavity is connected with the air duct through the top end surface.

[0010] Furthermore, the main body of the hydroponic planting device is also provided with a water tank fixing seat for fixing the water tank, and the air outlet consists of a first air outlet, a second air outlet and a third air outlet; the first air outlet is located above the accommodating cavity, the second air outlet is located on the water tank shell, and the third air outlet is located on the water tank fixing seat, and the second air outlet and the third air outlet are both located near the top end surface of the water tank shell.

[0011] Furthermore, the main body of the hydroponic planting device is also connected to a controller and a water pump for irrigation, and the water pump is arranged in the accommodating cavity; the air inlet is located at the bottom of the water tank fixing seat, and the controller is located in the air duct; the air inlet, the fan, and the controller are arranged on the same side of the water tank and arranged in a vertical direction; the accommodating cavity is located between the second air outlet and the fan; and the controller is electrically connected to the water pump and the fan, respectively.

[0012] Furthermore, the controller includes a sealing box and a main board, and the main board is located in the sealing box; the controller is located above the fan.

[0013] Furthermore, a slide rail and a fixing buckle are also provided at the bottom of the water tank fixing seat; a slide groove matching the slide rail and a groove matching the fixing buckle are provided at the bottom of the water tank shell; the water tank fixing seat and the water tank shell slide relative to each other through the slide rail and the slide groove, and when the water tank slides until the fixing buckle falls into the groove, the water tank is fixed to the water tank fixing seat from the outside of the hydroponic planting device body.

[0014] Furthermore, the water tank further comprises a water level identification column and a water level temperature sensor, the water level identification column and the water level temperature sensor are both fixed at the bottom of the accommodating cavity, and the water level temperature sensor is electrically connected to the controller.

[0015] Furthermore, the water tank fixing seat is also provided with an upper cover for covering the water tank, the upper cover is provided with a water inlet and a water inlet cover matching the water inlet, the water inlet is located above the water tank, the water return inlet is located on the upper cover, and the first air outlet is located on the water inlet cover; the water inlet cover is also provided with a first convex edge for covering the first air outlet, and the upper cover is also provided with a second convex edge for covering the second air outlet and a third convex edge for covering the third air outlet; the water tank fixing seat is also provided with a side shell and a bottom shell, the sliding rail, fixing buckle and air inlet are all located on the bottom shell; the side shell, the bottom shell, the upper cover and the water tank together form the air duct.

[0016] The beneficial effect of the present invention is that the cooling and oxygenation system for a hydroponic planting device provided by the present invention has the dual effects of effectively increasing the dissolved oxygen content in the hydroponic nutrient solution and reducing the temperature of the nutrient solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific structure of the present invention is described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a sample appearance diagram of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0019] Figure 2 This is a sample internal structure diagram of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0020] Figure 3 This is a sample exploded diagram of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0021] Figure 4 A cross-sectional view of a sample of a cooling and oxygenation system for a hydroponic planting device according to the present invention;

[0022] Figure 5 A detailed view of the bottom of a water tank of a sample of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0023] Figure 6 A detailed bottom view of a sample water tank fixing seat of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0024] Figure 7 A detailed view of a water inlet and a second air outlet of a sample of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0025] Figure 8 A detailed view of a sample fixing buckle and groove of a cooling and oxygenation system for a hydroponic planting device of the present invention;

[0026] Fig. 9A cross-sectional view of a hydroponic planting device sample using a cooling and oxygenation system for a hydroponic planting device according to the present invention;

[0027] Among them, 1-water tank fixing seat, 11-upper cover, 111-water return port, 112-water inlet cover, 113-first air outlet, 114-water inlet, 12-side shell, 121-third air outlet, 13-bottom shell, 131-slide rail, 132-fixing buckle, 133-air inlet, 134-castor, 2-water tank, 21-water tank shell, 211-second air outlet, 212-slide groove, 213-groove, 22-accommodating cavity, 23-water level identification column, 24-water pump, 25-water level temperature sensor, 26-fixed bracket, 3-air duct, 4-fan, 5-controller, 51-mainboard, 52-sealing box, 53-button, 6-vertical hydroponic fixing column. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figures 1 to 4 , a cooling and oxygenation system for a hydroponic planting device, comprising a hydroponic planting device body including a water tank 2 and a water return port 111, wherein an air duct 3 is further arranged inside the hydroponic planting device body, and the nutrient solution of the water return port 111 passes through the air duct 3 and then falls into the water tank 2; the air duct 3 comprises an air inlet 133 and an air outlet, and a fan 4 is arranged in the air duct 3 beside the air inlet 133; the air is driven by the fan 4 to enter the air duct 3 from the air inlet 133, and flows out from the air outlet after contacting the nutrient solution falling into the air duct 3; the water tank 2 is located at the bottom of the hydroponic planting device body. From the above description, it can be seen that the beneficial effect of the present invention is that the contact amount between the nutrient solution and the air is increased by blowing air through the fan 4, thereby increasing the cooling rate and oxygenation rate of the nutrient solution, and achieving the cooling and oxygenation effects at the same time. Since the water tank 2 is located at the bottom of the hydroponic planting device body, the nutrient solution falls back from the water return port 111 into the water tank 2 by gravity.

[0031] Although the traditional method of directly ventilating the water tank 2 can increase oxygen, the air pump generates a large amount of heat, which will cause the temperature of the nutrient solution to rise through air conduction, thereby affecting the growth of plants. However, the present invention increases oxygen after the nutrient solution is irrigated and before it falls back into the water tank. The fan 4 itself generates little heat, and due to the effect of evaporation and cooling, the dual effects of cooling the nutrient solution and increasing oxygen are achieved.

[0032] Example 2

[0033] Based on the above structure, please refer to Figures 2 to 4 , due to the effect of gravity, the water flow direction is vertically downward; when the air contacts the nutrient solution, the angle between the air flow direction and the water flow direction is α, 80°≤α≤100°. At this time, the cooling and oxygenation effect of the air contacting the nutrient solution is better.

[0034] Example 3

[0035] Based on the above structure, please refer to Figures 2 to 4 When the air contacts the nutrient solution, the airflow direction and the water flow direction are perpendicular to each other. At this time, the main structure of the hydroponic planting device is optimized and the overall space occupancy is small.

[0036] Example 4

[0037] Based on the above structure, please refer to Figures 1 to 4 The water tank 2 includes a receiving chamber 22 for loading the nutrient solution and a water tank shell 21 for supporting the receiving chamber 22, and the top end surface of the water tank shell 21 is open; the receiving chamber 22 is connected to the air duct 3 through the top end surface. At this time, the top of the water tank 2 is open, and the airflow in the air duct 3 not only contacts the nutrient solution falling from the return water port 111, but also contacts the liquid surface of the nutrient solution stored in the water tank 2, thereby accelerating the surface evaporation speed of the nutrient solution liquid surface and enhancing the cooling effect. In addition, since the top of the water tank 2 is open, the falling nutrient solution will not fall outside the water tank 2 even if it is affected by the airflow.

[0038] Example 5

[0039] Based on the above structure, please refer to Figures 1 to 4 as well as Figure 7The hydroponic planting device body is also provided with a water tank fixing seat 1 for fixing the water tank 2, and the air outlet is composed of a first air outlet 113, a second air outlet 211 and a third air outlet 121; the first air outlet 113 is located above the accommodating cavity 22, the second air outlet 211 is located on the water tank shell 21, and the third air outlet 121 is located on the water tank fixing seat 1, and the second air outlet 211 and the third air outlet 121 are both located near the top end surface of the water tank shell 21. A plurality of air outlets are provided to facilitate the discharge of the airflow in the air duct 3 in all directions. Preferably, the third air outlet 121 is provided with 2N or 2N+1 (N is a natural number), and is evenly distributed around the water tank 2, which is conducive to the formation of airflow on the liquid surface at various positions in the water tank 2 and improves the cooling effect.

[0040] Example 6

[0041] Based on the above structure, please refer to Figures 1 to 4 as well as Figure 6 The hydroponic planting device body is also connected with a controller 5 and a water pump 24 for irrigation. The water pump 24 is arranged in the accommodating chamber 22. Preferably, the water pump 24 is fixed to the bottom of the accommodating chamber 22 by a fixing bracket 26. The air inlet 133 is located at the bottom of the water tank fixing seat 1, and the controller 5 is arranged in the air duct 3. The air inlet 133, the fan 4, and the controller 5 are located on the same side of the water tank 2 and arranged in the vertical direction, so that the structural space of the hydroponic planting device body is small. The accommodating chamber 22 is located between the second air outlet 211 and the fan 4, ensuring that air convection is formed above the liquid level in the accommodating chamber 22. The controller 5 is electrically connected to the water pump 24 and the fan 4 respectively, and the controller 5 is also electrically connected to an external power supply. Since the controller 5 is located in the air duct 3, the airflow also takes away the heat emitted by the controller 5 at the same time, achieving multiple goals at one stroke.

[0042] Example 7

[0043] Based on the above structure, the controller 5 includes a sealing box 52 and a main board 51, and the main board 51 is located in the sealing box 52; the controller 5 is located above the fan 4, that is, the fan 4 is located between the controller 5 and the air inlet 133, and the controller 5 will not prevent the fan 4 from sucking air from the air inlet 133. The sealing box 52 is sealed by a sealant to prevent the water vapor evaporated from the water tank 2 from contacting the main board 51, avoiding leakage and corrosion, and extending the service life of the main board 51.

[0044] Example 8

[0045] Based on the above structure, please refer to Figures 1 to 6 as well as Figure 8, the bottom of the water tank fixing seat 1 is also provided with a slide rail 131 and a fixing buckle 132; the bottom of the water tank shell 21 is provided with a slide groove 212 matching the slide rail 131 and a groove 213 matching the fixing buckle 132; the water tank fixing seat 1 and the water tank shell 21 slide relative to each other through the slide rail 131 and the slide groove 212, and when the water tank 2 slides to the fixing buckle 132 and falls into the groove 213, the water tank 2 is fixed to the water tank fixing seat 1 from the outside of the hydroponic planting device body. The water tank 2 and the water tank fixing seat 1 are detachable, which is convenient for regular cleaning of the water tank 2 and avoids the problem of reduced oxygen content in the nutrient solution due to algae breeding in the water tank 2. In addition, in the present invention, compared with the traditional water tank, the weight of the water tank fixing seat 1, the fan 4, the controller 5, etc. is removed, and only the water tank 2 itself needs to be cleaned during cleaning, which is more convenient and avoids problems such as short circuit of the controller 5 during cleaning. Preferably, the hydroponic planting device body is further provided with a vertical hydroponic fixing column 6 for fixing the planting block, and the vertical hydroponic fixing column 6 is fixed on the water tank fixing seat 1. At this time, it is not necessary to dismantle the vertical hydroponic fixing column 6 or move the planted plants away when cleaning the water tank 2. In short, compared with a non-detachable water tank, a detachable water tank 2 is provided, which greatly reduces the difficulty of cleaning the water tank.

[0046] Example 9

[0047] Based on the above structure, please refer to Figures 1 to 4 The water tank 2 also includes a water level indicator column 23 and a water level temperature sensor 25. The water level indicator column 23 and the water level temperature sensor 25 are both fixed at the bottom of the accommodating chamber 22. The water level temperature sensor 25 is electrically connected to the controller 5. The water level temperature sensor 25 is a commercially available product that can simultaneously measure the water level and water temperature, which is convenient for reminding people to add nutrient solution and controlling the temperature of the nutrient solution. After cleaning the water tank 2, when adding nutrient solution, the water level indicator column 23 allows people to visually observe the liquid level of the nutrient solution in the water tank 2. Preferably, the water level temperature sensor 25 is also fixed to the bottom of the accommodating chamber 22 by a fixing bracket 26.

[0048] Example 10

[0049] Based on the above structure, please refer to Figures 1 to 8The water tank fixing seat 1 is also provided with an upper cover 11 for covering the water tank 2 to prevent debris from falling into the water tank and light from irradiating the nutrient solution; driven by the fan 4, the airflow in the air duct 3 first rises, and then is blocked by the controller 5 and the upper cover 11 above, and the airflow direction changes, and the new airflow direction of the airflow forms an angle α with the water flow direction of the nutrient solution falling back from the water return port 111; the upper cover 11 is provided with a water inlet 114 and a water inlet cover matching the water inlet 114. 112, convenient for daily addition of nutrient solution; the water return port 111 is located on the upper cover 11, the first air outlet 113 is located on the water inlet cover 112, and the water inlet 114 is located above the water tank 2; the water inlet cover 112 is also provided with a first convex edge for shielding the first air outlet 113, and the edge of the upper cover 11 is also provided with a second convex edge for shielding the second air outlet 211 and a third convex edge for shielding the third air outlet 121. Preferably, the controller 5 is also embedded in the upper cover 11, and the button 53 of the controller 5 is exposed on the upper cover 11 for easy operation. Preferably, the vertical hydroponic fixing column 6 is fixed on the upper cover 11 and is located above the water return port 111. After the nutrient solution driven by the water pump 24 waters the plants on the vertical hydroponic fixing column 6, the excess nutrient solution takes away the heat from the roots of the plants and the carbon dioxide produced by respiration, and finally gathers at the water return port 111. The first convex edge, the second convex edge, and the third convex edge block the light, preventing the light from directly irradiating the first air outlet 113, the second air outlet 211, and the third air outlet 121 to the accommodating chamber 22, effectively reducing the algae breeding in the nutrient solution, and avoiding the problem of reducing the oxygen content of the nutrient solution due to the large amount of algae breeding in the nutrient solution. Preferably, the second convex edge and the third convex edge are connected to form a closed loop, which improves the smoothness of the upper cover 11 and reduces excessive protrusions. Preferably, the upper cover 11 is circular, oval or square. Preferably, the water tank fixing seat 1 is also provided with a side shell 12 and a bottom shell 13, and the slide rail 131, the fixing buckle 132 and the air inlet 133 are all located on the bottom shell 13; the side shell 12, the bottom shell 13, the upper cover 11 and the water tank 2 together form the air duct 3. Preferably, when the water tank 2 is fixed on the water tank fixing base 1, a recess or handle is provided at the exposed position of the water tank shell 21 for conveniently pushing and pulling the water tank 2. Preferably, a first reinforcing rib is provided on the water tank 2 to strengthen the strength of the water tank 2, and a second reinforcing rib is provided on the side shell 12 to strengthen the strength of the water tank fixing base 1. Preferably, casters 134 are provided at the bottom of the water tank fixing base 1 to facilitate moving the water tank fixing base 1.

[0050] Table 1 Effects of the cooling and oxygenation system on nutrient solution temperature and dissolved oxygen

[0051]

[0052] In order to further discuss the effect of the cooling and oxygenation system for the hydroponic planting device of the present invention, the following Fig. 9 The hydroponic planting device with the vertical hydroponic fixed column 6 of the structure shown was tested. In the hydroponic planting device, a total of 18 lettuces were transplanted and planted for two weeks. When the nutrient solution was prepared, the temperature was kept at 20℃±0.5℃. Under the condition of no direct sunlight and room temperature maintained at 26℃±0.5℃: (1) The experimental group turned on the water pump 24 and the fan 4 at the same time and ran them for 12 hours. The dissolved oxygen content in the nutrient solution and the temperature of the nutrient solution were recorded every 3 hours. See Table 1 for details. It can be seen from Table 1 that the dissolved oxygen content of the nutrient solution in the water tank of the experimental group fluctuated within the range of 8mg / L-8.6mg / L. After the nutrient solution approached room temperature, the dissolved oxygen content of the nutrient solution fluctuated less. The temperature of the nutrient solution in the water tank 2 slowly increased, and after approaching room temperature, the temperature fluctuation did not exceed 26.4℃, which was slightly higher than the ideal room temperature and was within the normal error range. (2) The control group replaced the nutrient solution with fresh one, only turned on the water pump 24 and turned off the fan 4, and ran for 12 hours. The dissolved oxygen content in the nutrient solution and the temperature of the nutrient solution were recorded. See Table 1 for details. It can be seen from Table 1 that the dissolved oxygen in the nutrient solution in the water tank 2 of the control group fluctuated in the range of 6.5mg / L-8.6mg / L, and the dissolved oxygen content gradually decreased with the passage of time; the temperature of the nutrient solution in the water tank 2 gradually increased, and the temperature increase rate was greater than that of the experimental group, and was 3°C higher than the room temperature. In addition, at the same time point of operation, the dissolved oxygen content in the nutrient solution in the water tank 2 of the experimental group was always higher than that in the water tank 2 of the control group. In summary, the cultivation test shows that the heat dissipation design of the present invention can effectively reduce the temperature of the nutrient solution by 2-3°C, increase the dissolved oxygen content in the nutrient solution, which is beneficial to the growth of plants in high temperature weather, and increases the applicable time range and suitable varieties of hydroponic equipment.

[0053] In summary, the cooling and oxygenation system for a hydroponic planting device provided by the present invention can effectively increase the dissolved oxygen content in the hydroponic nutrient solution and reduce the temperature of the nutrient solution. In this system, by adjusting the air duct structure, the fan can dissipate heat for the controller and the nutrient solution at the same time, without adding additional production costs. In addition, the water tank can be disassembled and cleaned, which is more convenient to use.

[0054] Here, the first, second... only represent the distinction in their names, and do not represent any difference in their importance and position.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cooling and oxygenation system for a hydroponic planting device, characterized in that: The hydroponic planting device comprises a main body having a water tank and a water return port, wherein an air duct is further arranged inside the main body of the hydroponic planting device, and nutrient solution sequentially falls into the water tank through the water return port and the air duct; the air duct comprises an air inlet and an air outlet, and a fan is arranged in the air duct and beside the air inlet; air is driven by the fan to enter the air duct from the air inlet, and flows out from the air outlet after contacting the nutrient solution falling into the air duct; the water tank is located at the bottom of the main body of the hydroponic planting device; the water tank comprises a containing cavity for loading the nutrient solution and a water tank shell for supporting the containing cavity, and the water tank The top end surface of the shell is open; the accommodating cavity is connected with the air duct through the top end surface; the hydroponic planting device body is also provided with a water tank fixing seat for fixing the water tank, and the air outlet is composed of a first air outlet, a second air outlet and a third air outlet; the first air outlet is located above the accommodating cavity, the second air outlet is located on the water tank shell, and the third air outlet is located on the water tank fixing seat, and the second air outlet and the third air outlet are both located near the top end surface of the water tank shell; a recessed position or handle for convenient pushing and pulling of the water tank is provided at the exposed position of the water tank shell.

2. The cooling and oxygenation system for a hydroponic planting device according to claim 1, characterized in that: The direction of water flow is vertically downward; when air contacts the nutrient solution, the angle between the airflow direction and the water flow direction is α, 80°≤α≤100°.

3. The cooling and oxygenation system for a hydroponic planting device according to claim 2, characterized in that: When air comes into contact with nutrient solution, the direction of airflow and water flow are perpendicular to each other.

4. The cooling and oxygenation system for a hydroponic planting device according to claim 3, characterized in that: The main body of the hydroponic planting device is also connected to a controller and a water pump for irrigation, and the water pump is arranged in the accommodating cavity; the air inlet is located at the bottom of the water tank fixing seat, and the controller is arranged in the air duct; the air inlet, the fan, and the controller are located on the same side of the water tank and are arranged in the vertical direction; the accommodating cavity is located between the second air outlet and the fan; the controller is electrically connected to the water pump and the fan, respectively.

5. The cooling and oxygenation system for a hydroponic planting device according to claim 4, characterized in that: The controller comprises a sealing box and a main board, wherein the main board is located in the sealing box; and the controller is located above the fan.

6. The cooling and oxygenation system for a hydroponic planting device according to claim 5, characterized in that: A slide rail and a fixing buckle are also provided at the bottom of the water tank fixing seat; a slide groove matching the slide rail and a groove matching the fixing buckle are provided at the bottom of the water tank shell; the water tank fixing seat and the water tank shell slide relative to each other through the slide rail and the slide groove, and when the water tank slides until the fixing buckle falls into the groove, the water tank is fixed to the water tank fixing seat from the outside of the hydroponic planting device body.

7. The cooling and oxygenation system for a hydroponic planting device according to claim 6, characterized in that: The water tank further comprises a water level identification column and a water level temperature sensor. The water level identification column and the water level temperature sensor are both fixed to the bottom of the accommodating cavity. The water level temperature sensor is electrically connected to the controller.

8. The cooling and oxygenation system for a hydroponic planting device according to claim 7, characterized in that: The water tank fixing seat is also provided with an upper cover for covering the water tank, the upper cover is provided with a water inlet and a water inlet cover matching the water inlet, the water inlet is located above the water tank, the water return inlet is located on the upper cover, and the first air outlet is located on the water inlet cover; the water inlet cover is also provided with a first convex edge for shielding the first air outlet, and the upper cover is also provided with a second convex edge for shielding the second air outlet and a third convex edge for shielding the third air outlet; the water tank fixing seat is also provided with a side shell and a bottom shell, the slide rail, fixing buckle and air inlet are all located on the bottom shell; the side shell, the bottom shell, the upper cover and the water tank together form the air duct.

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