Automatic ventilation device for temperature and humidity control of seedling raising greenhouse

Abstract

The invention discloses an automatic ventilation device for temperature and humidity control of a seedling raising greenhouse, and the device comprises a greenhouse body which is a semicircular transparent cavity with one end provided with a ventilation opening; the shelter is arranged at the ventilation opening of the shed body; the portal frame is fixedly connected to one end of the greenhouse body, the middle of the portal frame is provided with a rolling assembly used for driving the shelter to be rolled up or put down according to the temperature and humidity so as to open and close the ventilation opening, and the middle of the rolling assembly is provided with a wire arranging part. The stability and the reliability of system operation are improved; meanwhile, the controller provides a convenient parameter setting interface, a user can flexibly adjust upper and lower limit threshold values of temperature and humidity according to growth requirements of different seasons and different seedling varieties, one set of device can adapt to diversified cultivation management requirements, and universality and practicability of the device are enhanced.

Description

Technical Field

[0001] This invention relates to the field of temperature and humidity control technology for seedling sheds, specifically to an automatic ventilation device for temperature and humidity control in seedling sheds. Background Technology

[0002] In the factory-style seedling production or greenhouse production of crops such as vegetables, flowers, and seedlings, precise control of temperature and humidity inside the greenhouse is a key factor affecting the growth quality of seedlings. Currently, ventilation management in many seedling greenhouses still relies on manual experience, adjusting by manually rolling up and down the side shading nets or plastic films. This method is inefficient and cannot respond to changes in temperature and humidity in real time, which may cause the greenhouse environment to exceed the suitable range for crops in a short period of time, affecting the uniformity and health of seedlings.

[0003] Existing technologies offer several automated solutions, such as integrated instruments that monitor and control multiple parameters including temperature, humidity, and light, or cooling devices that use evaporative air coolers in conjunction with complex air duct systems. However, these solutions are often complex in structure and expensive, making them unsuitable for small to medium-sized conventional seedling sheds with simple structures and limited investment. Therefore, there is a need for a device that is simple in structure, low in cost, directly adaptable to existing shed structures, and capable of automatically ventilating at temperature and humidity thresholds. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic ventilation device for temperature and humidity control in seedling sheds, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic ventilation device for temperature and humidity control in a seedling shed, comprising: The shed is a semi-circular transparent cavity with a ventilation opening at one end; A shield placed at the ventilation opening of the shed; A gantry frame fixed to one end of the shed body, wherein a winding assembly is installed in the middle of the gantry frame for driving the covering to roll up or down according to temperature and humidity to open or close the ventilation opening, and a cable routing section is provided in the middle of the winding assembly. Temperature and humidity sensors are placed inside the greenhouse.

[0006] Preferably, a solar panel is fixedly connected to the top of the gantry frame, and a battery is connected to the bottom of the solar panel via an inverter, with the battery being fixedly connected to the gantry frame.

[0007] Preferably, a crossbar is fixedly connected to the bottom of the shield, and counterweights are fixedly connected to both ends of the crossbar. A vertical rod is vertically fixed to one side of the gantry frame, and the vertical rod is slidably connected to the crossbar.

[0008] Preferably, the winding assembly includes a support frame fixed to the top of the gantry, a winding shaft is rotatably connected inside the support frame, a traction rope is wound around the outside of the winding shaft, and a drive motor for driving the winding shaft is fixed to one end of the support frame.

[0009] Preferably, the cable routing section includes a reciprocating lead screw, one end of the support frame is rotatably connected to a gear one and a gear two, the gear one and gear two are meshed, the gear two is drivenly connected to the end of the take-up shaft, and a reciprocating lead screw is rotatably connected inside the support frame and above the take-up shaft, one end of the reciprocating lead screw is drivenly connected to a gear one.

[0010] Preferably, a movable slider is engaged with the outer side of the reciprocating screw, the movable slider is slidably connected to the support frame, a cable guide rod is fixedly connected to the bottom of the movable slider, and the traction rope passes through the middle of the cable guide rod.

[0011] Preferably, the bottom of the traction rope is fixedly connected to two winding ropes, one end of which is fixedly connected to the top of the inner wall of the shed, and the obstruction is located between the two ends of the winding ropes.

[0012] Compared with existing technologies, the advantages of this invention are as follows: This invention monitors the greenhouse environment in real time using a temperature and humidity monitor, and combined with preset threshold logic in the controller, it can automatically and quickly respond to temperature and humidity changes that exceed the suitable range for crops, automatically opening and closing ventilation. This effectively avoids the lag and instability of manual experience-based control, thus providing a more stable and suitable environmental condition for seedling growth, which is conducive to improving the uniformity and health of seedlings. Furthermore, the core of this device adopts a modular monitor, controller, and actuator. In particular, the automatic ventilation device is ingeniously designed, using a motor, rope roller, and adjusting rope to automatically roll up and down the existing shading net / film, without requiring large-scale modifications to the existing greenhouse structure or the installation of complex air ducts and fan systems. The overall solution has a simple structure and the investment cost is far lower than existing integrated environmental control equipment, making it very suitable for widespread application in small and medium-sized conventional seedling greenhouses with simple structures and limited budgets. At the same time, the actuator of this device can be directly installed at the existing ventilation openings in the seedling greenhouse and directly connected to the existing shading nets, plastic films, and other coverings, achieving a seamless automated upgrade from traditional manual operation. Users do not need to change their existing production habits and management processes, which lowers the barrier to technology adoption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the crossbar structure of the present invention; Figure 3 This is a schematic diagram of the structure of the winding rope of the present invention; Figure 4 This is a schematic diagram of the gantry frame structure of the present invention; Figure 5 This is an enlarged view of point A in the present invention.

[0014] In the diagram: 2. Gantry frame; 3. Solar panel; 4. Shed; 5. Shading; 6. Winding rope; 7. Traction rope; 8. Temperature and humidity sensor; 9. Drive motor; 10. Support frame; 11. Reciprocating screw; 12. Winding shaft; 13. Moving slider; 14. Cable guide rod; 15. Gear 1; 16. Gear 2; 17. Battery; 18. Horizontal bar; 19. Counterweight; 20. Vertical bar. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0016] Please see Figures 1-5 This invention provides a technical solution: an automatic ventilation device for temperature and humidity control in a seedling shed, comprising: a shed body 4, which is a semi-circular transparent cavity with a ventilation opening at one end, and the shed body 4 is made of plastic film; a shielding object 5 hanging freely at the ventilation opening of the shed body 4, the shielding object 5 including at least one of a shade net and a plastic film; a gantry frame 2 fixed to one end of the shed body 4, the middle of the gantry frame 2 being equipped with a winding assembly for driving the shielding object 5 to roll up or down to open or close the ventilation opening according to temperature and humidity, the winding assembly having a wiring section in the middle; and a temperature and humidity sensor 8 fixedly installed inside the shed body 4 for detecting temperature and humidity, wherein the temperature range in spring / autumn is 20-30℃ and the upper limit of humidity is 85%, and the upper limit of temperature in the high-temperature season of summer is 30℃ and the upper limit of humidity is 90%.

[0017] It should be noted that in this embodiment, a PLC controller and an operation panel are provided. The temperature and humidity sensor 8 is electrically connected to the PLC controller, which has preset upper and lower limits for temperature and humidity. When the detected temperature and humidity values ​​are both lower than the preset lower limit, the winding assembly drives the shield 5 to fall downwards freely, thereby sealing one end of the shed 4. When the detected temperature and humidity values ​​are both lower than the preset upper limit, the winding assembly drives the shield 5 to roll up freely, thereby opening one end of the shed 4 for ventilation.

[0018] In one embodiment, a solar panel 3 is fixedly connected to the top of the gantry 2, and a battery 17 is connected to the bottom of the solar panel 3 via an inverter. The battery 17 is fixedly connected to the gantry 2.

[0019] It should be noted that in this embodiment, the solar panel 3 can generate electricity through solar energy, and the electricity is stored inside the battery 17 under the action of the inverter.

[0020] In one embodiment, a crossbar 18 is fixedly connected to the bottom of the shield 5, and counterweights 19 are fixedly connected to both ends of the crossbar 18. A vertical rod 20 is vertically fixed to one side of the gantry frame 2, and the vertical rod 20 is slidably connected to the crossbar 18.

[0021] It should be noted that, in this embodiment, the crossbar 18 and the counterweight 19 can pull the obstruction 5 downwards to straighten and tighten it, thereby preventing the obstruction 5 from getting tangled or folded during the downward process.

[0022] In one embodiment, the winding assembly includes a support frame 10 fixed to the top of the gantry 2. A winding shaft 12 is rotatably connected inside the support frame 10. A traction rope 7 is wound around the outside of the winding shaft 12. A drive motor 9 for driving the winding shaft 12 is fixedly connected to one end of the support frame 10. A gear 15 and a gear 2 16 are rotatably connected to one end of the support frame 10. The gear 15 and the gear 2 16 are meshed and connected to the end of the winding shaft 12. A reciprocating screw 11 is rotatably connected inside the support frame 10 and above the winding shaft 12. One end of the reciprocating screw 11 is connected to the gear 15. A movable slider 13 is meshed and connected to the outside of the reciprocating screw 11. The movable slider 13 is slidably connected to the support frame 10. A cable guide rod 14 is fixedly connected to the bottom of the movable slider 13. The traction rope 7 passes through the middle of the cable guide rod 14.

[0023] It should be noted that in this embodiment, during the operation of the drive motor 9, the take-up shaft 12 is rotated, thereby winding and unwinding the traction rope 7. During the rotation of the take-up shaft 12, the gear 16 drives the gear 15 to rotate, the gear 15 drives the reciprocating screw 11 to rotate, and the reciprocating screw 11 drives the movable slider 13 to slide back and forth inside the support frame 10. The movable slider 13 drives the cable guide rod 14 to move outside the take-up shaft 12. The cable guide rod 14 reciprocates the cable guide of the traction rope 7 outside the take-up shaft 12, thereby orderly winding the traction rope 7 around the outside of the take-up shaft 12 and preventing the traction rope 7 from tangling or knotting.

[0024] In one embodiment, the bottom of the traction rope 7 is fixedly connected to two winding ropes 6, one end of the winding rope 6 is fixedly connected to the top of the inner wall of the shed 4, and the cover 5 is located between the two ends of the winding rope 6.

[0025] It should be noted that in this embodiment, the ends of the traction rope 7 and the winding rope 6 are connected, and the other end of the winding rope 6 is connected to the end of the canopy 4. When the traction rope 7 is wound upward, the middle of the winding rope 6 lifts the crossbar 18 at the bottom of the barrier 5 upward, and the crossbar 18 moves upward along the vertical rod 20 to fold the barrier 5 upward. When the drive motor 9 reverses, the end of the traction rope 7 moves downward, and the crossbar 18 moves downward under the action of gravity, thereby pulling the barrier 5 downward to straighten and block it.

[0026] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic ventilation device for temperature and humidity control in a seedling shed, characterized in that: include: The shed body (4) is a semi-circular transparent cavity with a ventilation opening at one end; A shield (5) placed at the ventilation opening of the shed (4); A gantry frame (2) is fixed to one end of the shed body (4). The middle part of the gantry frame (2) is equipped with a winding assembly for driving the shield (5) to roll up or down according to the temperature and humidity to open and close the ventilation opening. The winding assembly is provided with a cable routing section in the middle. Temperature and humidity sensor (8) placed inside the shed (4).

2. The automatic ventilation device for temperature and humidity control in a seedling shed according to claim 1, characterized in that: A solar panel (3) is fixedly connected to the top of the gantry (2), and a battery (17) is connected to the bottom of the solar panel (3) through an inverter. The battery (17) is fixedly connected to the gantry (2).

3. The automatic ventilation device for temperature and humidity control in a seedling shed according to claim 1, characterized in that: The bottom of the shield (5) is fixedly connected to a crossbar (18), and the two ends of the crossbar (18) are fixedly connected to counterweights (19). A vertical rod (20) is vertically fixed to one side of the gantry frame (2), and the vertical rod (20) is slidably connected to the crossbar (18).

4. The automatic ventilation device for temperature and humidity control in a seedling shed according to claim 3, characterized in that: The winding assembly includes a support frame (10) fixed to the top of the gantry (2), a winding shaft (12) is rotatably connected inside the support frame (10), a traction rope (7) is wound around the outside of the winding shaft (12), and a drive motor (9) for driving the winding shaft (12) is fixed to one end of the support frame (10).

5. The automatic ventilation device for temperature and humidity control in a seedling shed according to claim 4, characterized in that: The cable laying section includes a reciprocating lead screw (11). One end of the support frame (10) is rotatably connected to a gear one (15) and a gear two (16). The gear one (15) and the gear two (16) are meshed together. The gear two (16) is driven to the end of the take-up shaft (12). The reciprocating lead screw (11) is rotatably connected inside the support frame (10) and above the take-up shaft (12). One end of the reciprocating lead screw (11) is driven to the gear one (15).

6. The automatic ventilation device for temperature and humidity control in a seedling shed according to claim 5, characterized in that: The reciprocating screw (11) is engaged with a movable slider (13) on its outer side. The movable slider (13) is slidably connected to the support frame (10). The bottom of the movable slider (13) is fixedly connected to a cable guide rod (14). The traction rope (7) passes through the middle of the cable guide rod (14).

7. The automatic ventilation device for temperature and humidity control in a seedling shed according to claim 6, characterized in that: Two winding ropes (6) are fixedly connected to the bottom of the traction rope (7). One end of the winding rope (6) is fixedly connected to the top of the inner wall of the shed (4). The cover (5) is located between the two ends of the winding rope (6).

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