Automatic seedling cultivation and irrigation device

Abstract

The application belongs to the technical field of seed cultivation, and particularly relates to a seed cultivation automatic irrigation device, and the following scheme is provided, which specifically comprises a breeding box, both ends of the breeding box are provided with pull-out rails, breeding racks are pullably installed between the pull-out rails, the top of each breeding rack is provided with a plurality of breeding cups in a mesh structure, both ends of the breeding box are further provided with horizontal electric guide rails, a longitudinal electric guide rail is installed between the two horizontal electric guide rails through an electric sliding block, and the top of the longitudinal electric guide rail is provided with a moving rack. In the application, the central part of the breeding cup is continuously ventilated through a ventilation mechanism, the air is used to accelerate the speed and uniformity of water diffusion, the humidity environment in the breeding cup and the air permeability of the soil are maintained, and when the ventilation mechanism and the irrigation mechanism are reset upwards, the soil around the breeding cup is left with continuous perforations, the soil temperature and humidity environment of the breeding cup is accurately controlled, and the yield of good seeds is improved.

Description

Technical Field

[0001] This invention relates to the field of seed cultivation technology, and in particular to an automatic irrigation device for seed cultivation. Background Technology

[0002] Seeds are not only essential for plant propagation and reproduction, but also a source of food and clothing for humankind. Seedlings are cultivated in nurseries, hotbeds, or greenhouses in preparation for transplanting into the ground. Centralized management enables precise seed cultivation and seedling raising, fostering strong seedlings and promoting root development, resulting in uniform plant growth, superior flower bud differentiation, significantly increased yield, and earlier market availability. Furthermore, standardized seedling cultivation reduces the occurrence of pests and diseases; for example, using pathogen-free substrates lowers the risk of soil-borne diseases.

[0003] Water management is the most important task in seed production. However, in practice, large-area spraying is often used to speed up seed irrigation. This large-area irrigation operation can easily lead to uneven water penetration and local water accumulation, making it impossible to accurately control moisture and humidity, and also making it impossible to ensure the air content in the cultivation soil, thus affecting the efficiency of seed cultivation.

[0004] In view of this, the present invention provides an automatic irrigation device for seed cultivation to solve the technical problems existing in the prior art. Summary of the Invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes an automatic irrigation device for seed cultivation.

[0006] This invention proposes an automatic irrigation device for seed cultivation, comprising a breeding box. Pull-out rails are installed at both ends of the breeding box, and breeding racks are pluggable between these rails. Multiple mesh-structured breeding cups are mounted on the top of the breeding racks. Horizontal electric guide rails are also installed at both ends of the breeding box, and a longitudinal electric guide rail is installed between the two horizontal electric guide rails via an electric slider. A movable platform is mounted on the top of the longitudinal electric guide rails, and a lifting mechanism is installed in the middle of the movable platform. A venting mechanism is installed at the bottom of the lifting mechanism, and an irrigation mechanism is installed in the middle of the venting mechanism. An air pump and a liquid storage tank are sequentially installed on the top of the breeding box. A water supply pipe is installed between the liquid storage tank and the irrigation mechanism. An air supply pipe, a three-way solenoid valve, and a manifold are installed between the venting mechanism and the air pump. A temperature and humidity sensor for monitoring the soil moisture inside the breeding cups is installed on one side of the bottom of the venting mechanism, and a camera for monitoring the breeding cups is installed on the other side of the bottom of the venting mechanism.

[0007] Preferably, in this invention, the lifting mechanism includes an electric telescopic rod mounted on a movable platform and a U-shaped bracket mounted at the bottom of the electric telescopic rod. The ventilation mechanism is fixedly mounted at the bottom of the U-shaped bracket, and vibration motors are mounted on both sides of the U-shaped bracket.

[0008] Preferably, in this invention, the venting mechanism includes a venting tube with an annular structure, and a connecting seat for fixing the irrigation mechanism is screwed to the middle of the venting tube. The bottom of the venting tube is provided with multiple threaded holes, and a venting insert is screwed into the inside of the threaded holes.

[0009] Preferably, in this invention, the bottom end of the ventilated cannula is made of an elastic material and has a frustum-shaped structure, and the bottom side of the ventilated cannula has an arc-shaped vent hole.

[0010] Preferably, in this invention, the irrigation mechanism includes a water storage cylinder connected to a venting mechanism, a water supply solenoid valve is connected between the top of the water storage cylinder and the water supply pipe, a piston is slidably installed inside the water storage cylinder, and a drain pipe is connected to the bottom of the piston, with an irrigation nozzle screwed to the bottom of the drain pipe.

[0011] Preferably, in this invention, the irrigation nozzle includes an end cap and a nozzle component screwed to the bottom of the outer side of the end cap. The bottom of the nozzle component is provided with a plurality of elastic spray holes arranged in a ring array, and the top of the outer side of the end cap is provided with a plurality of rectangular mounting grooves.

[0012] Preferably, in this invention, the irrigation mechanism further includes a spring sleeved on the outside of the vent tube, and a pressure sensor is installed between the top of the spring and the vent tube. A support ring is installed at the bottom of the spring, and a linkage is engaged on the outside of the support ring. The end of the linkage is inserted into a rectangular mounting groove.

[0013] Preferably, in this invention, a nutrient solution group is also installed on the top of the breeding box, and a circulation hose is connected between the nutrient solution group and the other inlet of the three-way solenoid valve.

[0014] Preferably, in this invention, the nutrient solution group includes multiple nutrient solution storage tanks, and a switching solenoid valve is connected to the side of each nutrient solution storage tank. An inlet pipe and a return pipe are installed sequentially between the inlet and outlet of the switching solenoid valve. The ends of the circulation hoses are respectively installed on the inlet pipe and the return pipe, and a circulation pump is installed between the inlet pipe and the return pipe.

[0015] Preferably, in this invention, the air pump consists of an air extraction fan and an air storage tank connected to each other, and the outlet of the air storage tank is connected to the air delivery pipe via a pressure solenoid valve.

[0016] Compared with the prior art, the present invention provides an automatic irrigation device for seed cultivation, which has the following beneficial effects: In this invention, a temperature and humidity sensor that moves above the breeding cup monitors the soil moisture environment inside the cup. Above the breeding cup are a ventilation mechanism and an irrigation mechanism that move up and down via a lifting mechanism. When the soil inside the breeding cup needs watering, the lifting mechanism lowers the ventilation and irrigation mechanisms. The bottom of the ventilation mechanism inserts into the soil inside the breeding cup, and an air pump loosens and aerates the soil. Then, the irrigation mechanism descends, and when its bottom contacts the soil surface, the water stored inside is squeezed out and evenly sprayed into the soil of the breeding cup, completing the irrigation operation for the seeds inside the cup. Simultaneously, during irrigation, the ventilation mechanism continuously ventilates to the center of the breeding cup, using the ventilated air to accelerate and evenly distribute the moisture, maintaining the humidity environment and soil permeability inside the breeding cup. When the ventilation and irrigation mechanisms return to their original positions, perforations are left around the soil in the breeding cup for continuous ventilation, precisely controlling the temperature and humidity environment of the soil and improving the seed quality rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an automatic seed cultivation irrigation device proposed in this invention; Figure 2 This is a rear view schematic diagram of an automatic seed cultivation irrigation device proposed in this invention; Figure 3 This is a schematic diagram of the internal structure of the breeding box of an automatic seed cultivation irrigation device proposed in this invention; Figure 4 This is a schematic diagram of the distribution structure of the movable platform of an automatic seed cultivation irrigation device proposed in this invention; Figure 5 This is a schematic diagram of the water pipe distribution structure of an automatic irrigation device for seed cultivation proposed in this invention; Figure 6 This is a schematic diagram of the nutrient solution group structure of an automatic seed cultivation irrigation device proposed in this invention; Figure 7 This is a schematic diagram of the distribution structure of a three-way solenoid valve in an automatic seed cultivation irrigation device proposed in this invention; Figure 8 This is a schematic diagram of the lifting mechanism of an automatic seed cultivation irrigation device proposed in this invention; Figure 9 This is a schematic diagram of the air vent structure of an automatic seed cultivation irrigation device proposed in this invention; Figure 10 This is a schematic diagram of the irrigation mechanism of an automatic irrigation device for seed cultivation proposed in this invention; Figure 11 This is a bottom view schematic diagram of the irrigation mechanism of an automatic irrigation device for seed cultivation proposed in this invention; Figure 12 This is a schematic diagram of the linkage structure of an automatic irrigation device for seed cultivation proposed in this invention.

[0018] In the diagram: 1. Breeding box; 2. Pull-out rail; 3. Breeding rack; 4. Breeding cup; 5. Horizontal electric guide rail; 6. Vertical electric guide rail; 7. Air pump; 8. Storage tank; 9. Nutrient solution group; 91. Nutrient solution storage tank; 92. Switching solenoid valve; 93. Suction pipe; 94. Circulation pump; 95. Return pipe; 10. Moving platform; 11. Irrigation mechanism; 111. Water storage cylinder; 112. Water delivery solenoid valve; 113. Piston; 114. Drain pipe; 115. End cap; 116. Sprinkler head; 117. Rectangular mounting slot; 118. Spring; 119. Support ring; 1110. Linkage component; 12. Ventilation mechanism; 121. Ventilation pipe; 122. Ventilation insertion tube; 123. Ventilation hole; 124. Connecting seat; 13. Lifting mechanism; 131. Electric telescopic rod; 132. U-shaped bracket, 133 vibration motor, 14 temperature and humidity sensor, 15 camera, 16 water pipe, 17 gas pipe, 18 circulation hose, 19 three-way solenoid valve, 20 manifold. Detailed Implementation

[0019] 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.

[0020] Reference Figures 1-12 An automatic seed cultivation irrigation device includes a breeding box 1. Pull-out rails 2 are installed at both ends of the breeding box 1, and breeding racks 3 are inserted and detachably installed between the pull-out rails 2. Multiple mesh-structured breeding cups 4 are installed on the top of the breeding racks 3. Horizontal electric guide rails 5 are also installed at both ends of the breeding box 1, and a longitudinal electric guide rail 6 is installed between the two horizontal electric guide rails 5 via an electric slider. A movable platform 10 is installed on the top of the longitudinal electric guide rail 6, and a lifting mechanism 13 is installed in the middle of the movable platform 10. A ventilation mechanism 12 is installed at the bottom of the breeding box 3. An irrigation mechanism 11 is installed in the middle of the ventilation mechanism 12. An air pump 7 and a liquid storage tank 8 are installed in sequence on the top of the breeding box 1. A water supply pipe 16 is installed between the liquid storage tank 8 and the irrigation mechanism 11. An air supply pipe 17, a three-way solenoid valve 19 and a manifold 20 are installed between the ventilation mechanism 12 and the air pump 7. A temperature and humidity sensor 14 for monitoring the soil moisture inside the breeding cup 4 is installed on one side of the bottom of the ventilation mechanism 12. A camera 15 for monitoring the breeding cup 4 is installed on the other side of the bottom of the ventilation mechanism 12.

[0021] In this invention, a temperature and humidity sensor 14, which moves above the breeding cup 4, monitors the soil moisture environment inside the breeding cup 4. Above the breeding cup 4, a ventilation mechanism 12 and an irrigation mechanism 11, driven up and down by a lifting mechanism 13, are installed. When the soil inside the breeding cup 4 needs watering, the lifting mechanism 13 lowers the ventilation mechanism 12 and the irrigation mechanism 11. The bottom end of the ventilation mechanism 12 inserts into the soil inside the breeding cup 4, and the air pump 7 loosens and aerates the soil. Then, the irrigation mechanism 11 lowers, and when its bottom contacts the soil surface… The water stored inside the irrigation mechanism 11 is squeezed out and evenly sprayed into the soil of the breeding cup 4, completing the watering operation of the seeds inside the breeding cup 4. At the same time, during the watering process, the ventilation mechanism 12 continuously ventilates to the center of the breeding cup 4, using the ventilated air to accelerate the speed and uniformity of water diffusion, maintaining the humidity environment inside the breeding cup 4 and the permeability of the soil. After the ventilation mechanism 12 and the irrigation mechanism 11 are reset upwards, perforations for continuous ventilation are left around the soil of the breeding cup 4, precisely controlling the temperature and humidity environment of the soil in the breeding cup 4, and improving the seed breeding yield.

[0022] As a further embodiment of the present invention, the lifting mechanism 13 includes an electric telescopic rod 131 mounted on the movable platform 10 and a U-shaped bracket 132 mounted at the bottom of the electric telescopic rod 131. The ventilation mechanism 12 is fixedly mounted at the bottom of the U-shaped bracket 132. Vibration motors 133 are mounted on both sides of the U-shaped bracket 132. In the present invention, the ventilation mechanism 12 and the irrigation mechanism 11 achieve vertical lifting movement through the cooperation of the U-shaped bracket 132 and the electric telescopic rod 131. When the ventilation mechanism 12 and the irrigation mechanism 11 move upward and reset, the vibration motors 133 drive the ventilation mechanism 12 and the irrigation mechanism 11 to vibrate, thereby preventing soil from being carried away and contaminating the environment inside the breeding box 1.

[0023] As a further embodiment of the present invention, the ventilation mechanism 12 includes a ring-shaped ventilation tube 121, and a connecting seat 124 for fixing the irrigation mechanism 11 is screwed to the middle of the ventilation tube 121. The bottom of the ventilation tube 121 is provided with multiple threaded holes, and a ventilation insertion tube 122 is screwed into the inside of the threaded holes. In the present invention, when the ventilation mechanism 12 moves downward, the ventilation insertion tube 122 is inserted into the soil of the breeding cup 4, and the ventilation insertion tube 122 is arranged in a ring, covering the seeds in the central area. Air is introduced into the central area through the ventilation insertion tube 122, thereby enhancing the ventilation effect of the ventilation insertion tube 122.

[0024] As a further embodiment of the present invention, the bottom end of the ventilated insert 122 is made of an elastic material and has a frustum-shaped structure. The bottom side of the ventilated insert 122 is provided with an arc-shaped vent hole 123. In the present invention, when the ventilated insert 122 is screwed in, the vent hole 123 is set inward. When the ventilated insert 122 is inserted into the breeding cup 4, the bottom end of the ventilated insert 122 is affected by the inner wall of the breeding cup 4, forming an umbrella-shaped distribution below the seed. Air flows from bottom to top, which, together with the water that permeates from the soil surface, accelerates the water diffusion speed, making the soil moisture distribution more uniform and enhancing the speed of temperature regulation of the soil around the seed.

[0025] As a further embodiment of the present invention, the irrigation mechanism 11 includes a water storage cylinder 111 connected to the venting mechanism 12. A water supply solenoid valve 112 is connected between the top of the water storage cylinder 111 and the water supply pipe 16. A piston 113 is slidably installed inside the water storage cylinder 111, and a drain pipe 114 is connected to the bottom of the piston 113. An irrigation nozzle is screwed to the bottom of the drain pipe 114. In the present invention, water inside the liquid storage tank 8 flows into the water storage cylinder 111 through the water supply pipe 16 and the water supply solenoid valve 112. When the irrigation mechanism 11 descends and contacts the soil, the irrigation nozzle driven by the soil pressure drives the drain pipe 114 and the piston 113 to move upward, thereby squeezing out the water inside the water storage cylinder 111. The amount of water squeezed out is controlled according to the descent distance, so as to achieve the effect of precise control of irrigation water volume.

[0026] As a further embodiment of the present invention, the irrigation nozzle includes an end cap 115 and a nozzle component 116 screwed to the bottom of the outer side of the end cap 115. The bottom of the nozzle component 116 is provided with a plurality of elastic spray holes arranged in a ring array, and the top of the outer side of the end cap 115 is provided with a plurality of rectangular mounting grooves 117. In the present invention, when the nozzle component 116 descends, the water inside the water storage cylinder 111 is squeezed out from the elastic spray holes and diffuses in a ring on the soil surface of the breeding cup 4, thereby increasing the speed of water diffusion and fully wetting the soil around the seeds, while maintaining the soil permeability.

[0027] As a further embodiment of the present invention, the irrigation mechanism 11 also includes a spring 118 sleeved on the outside of the vent tube 122, and a pressure sensor is installed between the top of the spring 118 and the vent tube 121. A support ring 119 is installed at the bottom of the spring 118, and a linkage 1110 is engaged on the outside of the support ring 119. The end of the linkage 1110 is inserted into the rectangular mounting groove 117. In the present invention, when the irrigation mechanism 11 descends, the spring 118 first contracts and drives the irrigation nozzle to move upward through the linkage 1110. By monitoring the pressure of the pressure sensor 117, the upward movement distance of the irrigation nozzle is obtained, and the amount of water squeezed out inside the water storage cylinder 111 is quickly determined. When the irrigation mechanism 11 finishes irrigation, the spring 118 pushes the irrigation nozzle to move downward, quickly drawing water from the liquid storage tank 8, accelerating the water replenishment process, and improving irrigation efficiency.

[0028] As a further embodiment of the present invention, a nutrient solution group 9 is also installed on the top of the breeding box 1, and a circulation hose 18 is connected between the nutrient solution group 9 and another inlet of the three-way solenoid valve 19. In the present invention, multiple groups of water and fertilizer are configured and stored in the nutrient solution group 9 according to the nutrients required at each stage of seed cultivation. When fertilization is needed, the water and fertilizer are circulated, and the circulation hose 18 and the collection pipe 20 are connected through the three-way solenoid valve 19 to inject a certain amount of water and fertilizer into the venting mechanism 12. The water and fertilizer are applied around the seeds by means of the venting tube 122.

[0029] As a further embodiment of the present invention, the nutrient solution group 9 includes multiple nutrient solution storage tanks 91, and a switching solenoid valve 92 is connected to the side of each nutrient solution storage tank 91. A suction pipe 93 and a return pipe 95 are sequentially installed between the inlet and outlet of the switching solenoid valve 92. The ends of the circulation hose 18 are respectively installed on the suction pipe 93 and the return pipe 95. A circulation pump 94 is installed between the suction pipe 93 and the return pipe 95. In this invention, according to the growth stage of the seed, the corresponding switching solenoid valve 92 is opened sequentially. The circulation pump 94 constructs a water and fertilizer circulation, which fully dissolves the water and fertilizer. A circulation is constructed in the circulation hose 18 connected to a three-way solenoid valve 19. Opening the three-way solenoid valve 19 allows some water and fertilizer to be introduced into the aeration mechanism 12. According to the characteristics of water and fertilizer application, the fertilization operation at multiple locations such as the surface, middle and deep layers is completed by relying on the depth of the aeration tube 122 inserted into the soil, thereby improving the fertilization effect.

[0030] As a further embodiment of the present invention, the air pump 7 consists of an air extraction fan and an air storage tank connected to each other, and the outlet of the air storage tank is connected to the air delivery pipe 17 through a pressure solenoid valve. In the present invention, compressed air is stored in the air storage tank. When it is necessary to perform aeration treatment on the seeds, the pressure of the discharged air is controlled by the pressure solenoid valve to avoid affecting the soil structure and enhance the aeration effect.

[0031] In use, a temperature and humidity sensor 14, which moves above the breeding cup 4, monitors the soil moisture environment inside the breeding cup 4. Above the breeding cup 4 are a ventilation mechanism 12 and an irrigation mechanism 11, which move up and down via a lifting mechanism 13. When the soil inside the breeding cup 4 needs watering, the lifting mechanism 13 lowers the ventilation mechanism 12 and the irrigation mechanism 11. The bottom of the ventilation mechanism 12 inserts into the soil inside the breeding cup 4, and the air pump 7 loosens and aerates the soil. Then, the irrigation mechanism 11 lowers, with its bottom contacting the soil. When the seeds are on the soil surface, the water stored inside the irrigation mechanism 11 is squeezed out and evenly sprayed into the soil of the breeding cup 4, completing the watering operation of the seeds inside the breeding cup 4. At the same time, during the watering process, the ventilation mechanism 12 continuously ventilates to the center of the breeding cup 4, using the ventilated air to accelerate the speed and uniformity of water diffusion, maintaining the humidity environment inside the breeding cup 4 and the permeability of the soil. After the ventilation mechanism 12 and the irrigation mechanism 11 are reset upwards, perforations for continuous ventilation are left around the soil of the breeding cup 4, precisely controlling the temperature and humidity environment of the soil in the breeding cup 4.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic irrigation device for seed cultivation, comprising a breeding box (1), wherein both ends of the breeding box (1) are equipped with pull-out rails (2), and breeding racks (3) are inserted and detached between the pull-out rails (2), and the top of the breeding racks (3) is provided with a plurality of breeding cups (4) with a mesh structure, characterized in that, The breeding box (1) is equipped with transverse electric guide rails (5) at both ends, and a longitudinal electric guide rail (6) is installed between the two transverse electric guide rails (5) via an electric slider. A movable platform (10) is installed on the top of the longitudinal electric guide rail (6), a lifting mechanism (13) is installed in the middle of the movable platform (10), a ventilation mechanism (12) is installed at the bottom of the lifting mechanism (13), and an irrigation mechanism (11) is installed in the middle of the ventilation mechanism (12). The top of the breeding box (1) is... The device is equipped with an air pump (7) and a liquid storage tank (8). A water supply pipe (16) is installed between the liquid storage tank (8) and the irrigation mechanism (11). An air supply pipe (17), a three-way solenoid valve (19), and a manifold (20) are installed between the air venting mechanism (12) and the air pump (7). A temperature and humidity sensor (14) for monitoring the soil moisture inside the breeding cup (4) is installed on one side of the bottom of the air venting mechanism (12). A camera (15) for monitoring the breeding cup (4) is installed on the other side of the bottom of the air venting mechanism (12). The ventilation mechanism (12) includes a ring-shaped ventilation tube (121), and a connecting seat (124) for fixing the irrigation mechanism (11) is screwed into the middle of the ventilation tube (121). The bottom of the ventilation tube (121) is provided with multiple threaded holes, and a ventilation insert (122) is screwed into the inside of the threaded holes. The bottom end of the ventilation insert (122) is made of elastic material, and the bottom end of the ventilation insert (122) has a frustum-shaped structure. An arc-shaped ventilation hole (123) is provided on the bottom side of the ventilation insert (122). The irrigation mechanism (11) includes a water storage cylinder (111) connected to a venting mechanism (12). A water supply solenoid valve (112) is connected between the top of the water storage cylinder (111) and the water supply pipe (16). A piston (113) is slidably installed inside the water storage cylinder (111), and a drain pipe (114) is connected to the bottom of the piston (113). An irrigation nozzle is screwed to the bottom of the drain pipe (114). The irrigation nozzle includes an end cap (115) and a nozzle component (116) screwed to the bottom of the outer side of the end cap (115). The bottom of the nozzle component (116) is provided with a plurality of elastic spray holes arranged in a ring array. The top of the outer side of the end cap (115) is provided with a plurality of rectangular mounting grooves (117). The irrigation mechanism (11) also includes a spring (118) sleeved on the outside of the vent tube (122), and a pressure sensor is installed between the top of the spring (118) and the vent tube (121). A support ring (119) is installed at the bottom of the spring (118), and a linkage (1110) is snapped onto the outside of the support ring (119). The end of the linkage (1110) is inserted into the rectangular mounting groove (117).

2. The automatic irrigation device for seed cultivation according to claim 1, characterized in that, The lifting mechanism (13) includes an electric telescopic rod (131) installed on a mobile platform (10) and a U-shaped bracket (132) installed at the bottom of the electric telescopic rod (131). The ventilation mechanism (12) is fixedly installed at the bottom of the U-shaped bracket (132). Vibration motors (133) are installed on both sides of the U-shaped bracket (132).

3. The automatic irrigation device for seed cultivation according to claim 1, characterized in that, The top of the breeding box (1) is also equipped with a nutrient solution group (9), and a circulation hose (18) is connected between the nutrient solution group (9) and the other inlet of the three-way solenoid valve (19).

4. The automatic irrigation device for seed cultivation according to claim 3, characterized in that, The nutrient solution group (9) includes multiple nutrient solution storage tanks (91), and a switching solenoid valve (92) is connected to the side of the nutrient solution storage tank (91). A suction pipe (93) and a return pipe (95) are installed between the inlet and outlet of the switching solenoid valve (92). The ends of the circulation hose (18) are respectively installed on the suction pipe (93) and the return pipe (95). A circulation pump (94) is installed between the suction pipe (93) and the return pipe (95).

5. The automatic irrigation device for seed cultivation according to claim 1, characterized in that, The air pump (7) consists of an air extraction fan and an air storage tank connected to each other, and the outlet of the air storage tank is connected to the air supply pipe (17) through a pressure solenoid valve.

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