A ventilation device for a vegetable planting greenhouse

Abstract

This utility model discloses a ventilation device for vegetable greenhouses, including a greenhouse body and a ventilation assembly located on one side of it. The ventilation assembly consists of an installation frame, a ventilation plate embedded in the frame, a staggered plate attached to the ventilation plate, and an axial flow fan. The ventilation plate has evenly spaced ventilation holes and an insect-proof net attached to its surface, with a screw compartment connected to its bottom. The staggered plate has flow holes and vertical grooves on its surface, and a V-shaped guide groove at its bottom. The screw compartment contains a double-headed screw driven by a motor, with a bent connecting column fixedly connected to a screw sleeve. The motor drives the double-headed screw to rotate, causing the sliding sleeve to move horizontally. The sliding of the bent connecting column in the inclined groove is converted into precise lifting and lowering of the staggered plate, thereby adjusting the overlap area between the ventilation holes and the flow holes, achieving stepless adjustment from fully open to completely closed. This device achieves precise control and sealing of ventilation volume, effectively prevents insects, and improves the automation level and management efficiency of greenhouse ventilation.

Description

Technical Field

[0001] This utility model relates to the field of vegetable greenhouse technology, specifically a ventilation device for vegetable greenhouses. Background Technology

[0002] As an important facility in modern agriculture, the stability of the internal environment of vegetable greenhouses is crucial for crop growth. Among these factors, ventilation is a key means of regulating temperature and humidity and replenishing carbon dioxide. Therefore, efficient and reliable ventilation devices are an indispensable component of greenhouses. Existing greenhouse ventilation technologies mostly use simple roll-up windows or side-sliding windows, which lack precise opening adjustment and have limited insect control effects.

[0003] CN222751032U discloses a ventilation device for vegetable greenhouses, including a greenhouse body with openings on its left and right sides. When ventilation is required, a bidirectional motor operates, driving transmission rods on both sides to rotate simultaneously. These transmission rods drive a drive gear, which in turn drives a driven gear, which in turn drives a threaded rod. This causes the ventilation window to move longitudinally within the mounting slot. When the ventilation window moves upward, it moves a filter screen into the opening slot. Simultaneously, the filter screen blocks unidentified flying insects from the outside, reducing the probability of pests affecting the vegetables inside the greenhouse and improving the overall effectiveness of the greenhouse. The device is reusable and easy to operate. However, this patent still has the following problems in practical use:

[0004] The aforementioned device opens and closes the opening slots via a fully lifting ventilation window. While it can simultaneously provide ventilation and pest control when fully open, its "overall blocking" adjustment principle has inherent flaws when attempting ventilation adjustment (i.e., remaining in a partially open position): the solid part of the window completely blocks ventilation in part of the window area, resulting in a reduction in the effective ventilation area and an inability to achieve linear, continuous, and precise control. This adjustment method disrupts airflow organization, easily leading to poor ventilation and low efficiency when low ventilation rates are required; and when the outside wind is strong, the concentrated openings cause airflow to rush into the greenhouse at high speed and in a concentrated manner, forming localized strong winds, which are detrimental to the stability of the greenhouse environment and crop growth.

[0005] A ventilation device for vegetable greenhouses is proposed to address the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a ventilation device for vegetable greenhouses, addressing the shortcomings of the aforementioned devices in the background art. These devices, which rely on a single, lifting ventilation window to open and close the opening, while achieving both ventilation and pest control when fully open, suffer from inherent flaws in their "overall blocking" adjustment principle when attempting ventilation adjustment (i.e., remaining in a partially open position). The solid window portion completely blocks ventilation in a portion of the window area, reducing the effective ventilation area and preventing linear, continuous, and precise control. This adjustment method disrupts airflow organization, leading to poor ventilation and inefficiency when low ventilation rates are required. Furthermore, when external winds are strong, the concentrated openings cause airflow to rush into the greenhouse at high speed and in a concentrated manner, creating localized strong winds that are detrimental to the stability of the greenhouse environment and crop growth.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a ventilation device for vegetable greenhouses, comprising the main body of the greenhouse;

[0008] A ventilation component is provided on one side of the main body of the greenhouse. The ventilation component includes an installation frame. A blocking frame is fixedly connected in the middle of the interior of the installation frame. A ventilation plate is provided on the side of the interior of the installation frame closest to the outside. An axial flow fan is fixedly installed on the other side of the interior of the installation frame.

[0009] Among them, an insect-proof net is glued to the side of the ventilation panel closest to the outside, and a staggered plate is installed on the other side of the ventilation panel;

[0010] The ventilation plate has ventilation holes on its surface, a screw compartment is fixedly connected to the bottom center of the ventilation plate, sliding columns are symmetrically fixedly connected to both sides of the ventilation plate, vertical grooves are symmetrically opened on both sides of the misaligned plate, flow holes are opened on the surface of the misaligned plate, and a guide groove and a clearance groove are opened in the bottom center of the misaligned plate.

[0011] Preferably, the mounting frame is fixedly and through-connected to one side of the greenhouse body, the ventilation plate has mounting mechanisms at the four corners of the side closest to the outside, the sliding column is slidably connected to the vertical groove, the end of the sliding column away from the ventilation plate is fixedly connected to a blocking block, the flow hole and the ventilation hole have the same diameter and the same array distribution spacing, the misalignment plate is fitted to the edge of the blocking frame, and the ventilation plate is fitted and connected to the misalignment plate.

[0012] Preferably, the guide groove is located above the avoidance groove, the screw compartment is connected to the avoidance groove through, a first motor is fixedly connected to one end of the screw compartment, a double-headed screw rotates inside the screw compartment, a sliding sleeve is threaded onto the outside of the double-headed screw, and a bent connecting column is fixedly connected to the top of the sliding sleeve.

[0013] Preferably, the top end of the bent connecting column is slidably connected to the guide groove, the sliding sleeve is slidably connected to the inner wall of the screw chamber, and the output end of the first motor is fixedly connected to the double-headed screw.

[0014] Preferably, the ventilation plate and the misalignment plate have the same width, and the ventilation plate is fitted into the mounting frame.

[0015] Preferably, the installation mechanism includes a hook-shaped locking block, a crank is fixedly connected to the outer side of the hook-shaped locking block, and hook grooves are symmetrically opened on the inner side of the end of the installation frame near the outside. The hook-shaped locking block is inserted into the hook groove with a small interference fit.

[0016] Preferably, the hook-shaped locking block is rotatably connected to the ventilation plate via a damping rotating shaft, and the damping rotating shaft is connected through the insect-proof net.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This ventilation device for vegetable greenhouses, driven by a motor and combined with a clever V-shaped inclined groove-slider conversion mechanism, achieves precise adjustment of the ventilation opening area, significantly improving the freedom and precision of greenhouse ventilation management. The specific details are as follows:

[0018] 1. Driven by a first motor, the double-headed screw rotates, causing the sliding sleeve to move horizontally. The horizontal movement is then converted into precise vertical lifting and lowering of the misaligned plate through the cooperation of the bent connecting column and the V-shaped inclined groove guide. This mechanism can linearly and continuously change the overlapping area of ​​the flow holes on the misaligned plate and the ventilation holes on the ventilation plate, thus achieving precise adjustment of any ventilation state from completely closed to fully open. Employing a "large area, small through-hole" ventilation method, air enters the greenhouse through a large number of evenly distributed small holes, forming a dispersed, gentle, and uniform airflow. This avoids the physical damage and physiological stress caused by direct airflow blowing on crops when there is strong external wind or direct ventilation. This uniform micro-airflow environment is more conducive to the stability of the temperature and humidity field inside the greenhouse, providing a better environment for crop growth.

[0019] 2. The small interference fit design requires a certain force to be applied when the hook-shaped locking block rotates into and out of the slot. Combined with the downward torque generated by the weight of the crank handle, this forms a vibration-resistant, self-locking, and stable structure. This effectively prevents the locking mechanism from loosening due to vibrations caused by equipment operation or natural wind, ensuring the long-term stability of the connection. Secondly, the design of the damping shaft is a key improvement. It ensures that after the user unlocks the device by turning the crank handle, the hook-shaped locking block will not quickly return to its unlocked position due to gravity, but will remain in its unlocked position. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0021] Figure 2This is a schematic diagram of the installation structure of the ventilation components and the mounting mechanism;

[0022] Figure 3 This is a cross-sectional structural diagram of the mounting frame;

[0023] Figure 4 This is an exploded structural diagram of the ventilation plate, the misalignment plate, and the screw.

[0024] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Greenhouse main body; 2. Ventilation components; 201. Mounting frame; 2011. Barrier frame; 202. Ventilation plate; 2021. Ventilation hole; 2022. Sliding column; 2023. Barrier block; 203. Insect net; 204. Misalignment plate; 2041. Vertical groove; 2042. Flow hole; 2043. Guide groove; 2044. Avoidance groove; 205. Axial flow fan; 206. Screw compartment; 2061. First motor; 2062. Double-headed screw; 2063. Sliding sleeve; 2064. Bending connecting column; 3. Installation mechanism; 301. Hook-shaped locking block; 302. Crank handle; 303. Hook groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 This utility model provides a technical solution: a ventilation device for vegetable greenhouses, comprising a greenhouse body 1;

[0028] A ventilation component 2 is provided on one side of the main body 1 of the greenhouse. The ventilation component 2 includes a mounting frame 201. A stop frame 2011 is fixedly connected in the middle of the inside of the mounting frame 201. A ventilation plate 202 is provided on the side of the inside of the mounting frame 201 that is close to the outside. An axial flow fan 205 is fixedly installed on the other side of the inside of the mounting frame 201. The axial flow fan 205 can perform auxiliary ventilation when it is started.

[0029] Among them, the ventilation board 202 has an insect-proof net 203 attached to the side closest to the outside, and a staggered plate 204 is installed on the other side of the ventilation board 202; the insect-proof net 203 can prevent mosquitoes from entering the greenhouse body 1 through the ventilation hole 2021 and the flow hole 2042.

[0030] The ventilation plate 202 has ventilation holes 2021 on its surface. A screw compartment 206 is fixedly connected to the bottom center of the ventilation plate 202. Sliding columns 2022 are symmetrically fixedly connected to both sides of the ventilation plate 202. Vertical grooves 2041 are symmetrically opened on both sides of the misalignment plate 204. Flow holes 2042 are opened on the surface of the misalignment plate 204. A guide groove 2043 and a clearance groove 2044 are opened in the bottom center of the misalignment plate 204. The guide groove 2043 is located above the clearance groove 2044. The screw compartment 206 is connected to the clearance groove 2044. A first motor 2061 is fixedly connected to one end of the screw compartment 206. A double-headed screw 2062 rotates inside the screw compartment 206. A sliding sleeve 2063 is threaded onto the outside of the double-headed screw 2062. A bent connecting column 2064 is fixedly connected to the top of the sliding sleeve 2063. The top of column 2064 is slidably connected to guide groove 2043, and sliding sleeve 2063 is slidably connected to the inner wall of screw chamber 206. The output end of first motor 2061 is fixedly connected to double-headed screw 2062. By starting first motor 2061, double-headed screw 2062 is rotated, thereby causing bent connecting column 2064 to move horizontally. The movement of bent connecting column 2064 in guide groove 2043 will change the height of misalignment plate 204, thereby changing the overlapping and connecting area of ​​flow hole 2042 and ventilation hole 2021, realizing automatic sealing and adjustment of natural ventilation flow rate. Guide groove 2043 is a V-shaped inclined groove. Sliding column 2022 and vertical groove 2041 can guide misalignment plate 204 to rise and fall vertically. Block 2023 can keep misalignment plate 204 and ventilation plate 202 in contact. First motor 2061 is servo motor.

[0031] The mounting frame 201 is fixedly and through-connected to one side of the greenhouse body 1. The ventilation plate 202 has four mounting mechanisms 3 at the four corners of the side closest to the outside. The sliding column 2022 is slidably connected to the vertical groove 2041. The end of the sliding column 2022 away from the ventilation plate 202 is fixedly connected to the blocking block 2023. The flow hole 2042 and the ventilation hole 2021 have the same diameter and the same array distribution spacing. The misalignment plate 204 fits the edge of the blocking frame 2011. The ventilation plate 202 and the misalignment plate 204 are fitted together. The flow hole 2042 and the ventilation hole 2021 opened at the array distribution spacing can achieve three states: complete connection, partial ventilation blockage, and complete misalignment and closure by adjusting the relative position of the ventilation plate 202 and the misalignment plate 204.

[0032] The ventilation plate 202 and the misalignment plate 204 have the same width, and the ventilation plate 202 is fitted into the mounting frame 201. After the ventilation plate 202 is embedded into the mounting frame 201, it will be blocked by the blocking frame 2011, which limits its position and prevents it from sliding.

[0033] The mounting mechanism 3 includes a hook-shaped locking block 301. A crank 302 is fixedly connected to the outer side of the hook-shaped locking block 301. A hook groove 303 is symmetrically opened on the inner side of the end of the mounting frame 201 near the outside. The hook-shaped locking block 301 is inserted into the hook groove 303 with a small interference fit. When the crank 302 is held and the hook-shaped locking block 301 is rotated, the hook-shaped locking block 301 is inserted into the hook groove 303 from the side. The interference fit is used to assist in fixing, so that the hook-shaped locking block 301 needs to be turned into or out of the hook groove 303 with a slightly larger force. At the same time, the weight of the crank 302 is greater than that of the hook-shaped locking block 301. The weight of the crank 302 will naturally apply a force in the direction of the hook-shaped locking block 301 inserting into the hook groove 303, keeping the state of insertion into the hook groove 303. Ultimately, even if the equipment vibrates naturally, it will not affect the stability of the connection between the hook-shaped locking block 301 and the hook groove 303.

[0034] The hook-shaped locking block 301 is rotatably connected to the ventilation plate 202 via a damping shaft, and the damping shaft is connected through the insect screen 203. The damping shaft includes a shaft and a friction sleeve sleeved on the shaft. By utilizing the frictional resistance between the friction sleeve and the ventilation plate 202, the hook-shaped locking block 301 will not fall back quickly after being rotated and disengaged from the hook groove 303, thus maintaining the unlocked position of the hook-shaped locking block 301 and facilitating the disassembly and cleaning of the ventilation plate 202.

[0035] Working principle: Before using this type of ventilation device for vegetable greenhouses, it is necessary to check the overall condition of the device to ensure it can function properly. Figure 1 - Figure 5 As shown, when natural ventilation needs to be adjusted, the first motor 2061 is started, driving the double-headed screw 2062 to rotate, and the sliding sleeve 2063 that is threadedly engaged with the double-headed screw 2062 moves horizontally within the screw chamber 206.

[0036] The sliding sleeve 2063 drives the bent connecting column 2064 at its top to move horizontally in sync. The top of the bent connecting column 2064 is embedded in the guide groove 2043 at the bottom of the misaligned plate 204 and slides therein. Since the guide groove 2043 is a V-shaped inclined groove, the horizontal movement of the bent connecting column 2064 is converted into the vertical movement of the guide groove 2043, thereby driving the entire misaligned plate 204 to move vertically up and down along the trajectory defined by the sliding column 2022 and the vertical groove 2041 on the ventilation plate 202.

[0037] The lifting and lowering of the misaligned plate 204 changes the overlapping area of ​​its surface flow hole 2042 and the surface ventilation hole 2021 of the ventilation plate 202: when the two holes completely overlap, the ventilation area is the largest, achieving complete natural ventilation; when they partially overlap, the ventilation area decreases, achieving stepless adjustment of the ventilation volume; when they are completely misaligned, the ventilation channel is closed, achieving a closed state.

[0038] If forced ventilation is required, the axial flow fan 205 can be started for auxiliary ventilation. Throughout the process, the insect net 203 always plays the role of blocking mosquitoes.

[0039] When maintenance is required, the hook-shaped locking block 301 can be rotated by rotating the crank handle 302 to overcome the friction of the damping shaft and the interference fit with the hook groove 303, so that the entire ventilation plate 202 assembly can be removed from the mounting frame 201 for cleaning.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ventilation device for vegetable greenhouses, comprising the main body of the greenhouse (1); Its features are, Also includes: A ventilation component (2) is provided on one side of the main body (1) of the greenhouse. The ventilation component (2) includes a mounting frame (201). A blocking frame (2011) is fixedly connected in the middle of the inside of the mounting frame (201). A ventilation plate (202) is provided on the side of the inside of the mounting frame (201) close to the outside. An axial flow fan (205) is fixedly installed on the other side of the inside of the mounting frame (201). Among them, an insect-proof net (203) is glued to the side of the ventilation panel (202) that is close to the outside, and a staggered plate (204) is installed on the other side of the ventilation panel (202); The ventilation plate (202) has ventilation holes (2021) on its surface, a screw compartment (206) is fixedly connected to the bottom center of the ventilation plate (202), sliding columns (2022) are symmetrically fixedly connected to both sides of the ventilation plate (202), vertical grooves (2041) are symmetrically opened on both sides of the misaligned plate (204), flow holes (2042) are opened on the surface of the misaligned plate (204), and a guide groove (2043) and a clearance groove (2044) are opened in the bottom center of the misaligned plate (204).

2. The ventilation device for vegetable greenhouses according to claim 1, characterized in that: The mounting frame (201) is fixedly and through-connected to one side of the greenhouse body (1). The ventilation plate (202) is provided with mounting mechanisms (3) at the four corners of the side closest to the outside. The sliding column (2022) is slidably connected through the vertical groove (2041). The end of the sliding column (2022) away from the ventilation plate (202) is fixedly connected with a blocking block (2023). The flow hole (2042) and the ventilation hole (2021) have the same diameter and the same array distribution spacing. The misalignment plate (204) is attached to the edge of the blocking frame (2011). The ventilation plate (202) is attached to the misalignment plate (204).

3. The ventilation device for vegetable greenhouses according to claim 1, characterized in that: The guide groove (2043) is located above the clearance groove (2044). The screw chamber (206) is connected through the clearance groove (2044). One end of the screw chamber (206) is fixedly connected to a first motor (2061). A double-headed screw (2062) rotates inside the screw chamber (206). A sliding sleeve (2063) is threaded onto the outside of the double-headed screw (2062). A bent connecting column (2064) is fixedly connected to the top of the sliding sleeve (2063).

4. The ventilation device for vegetable greenhouses according to claim 3, characterized in that: The top end of the bent connecting column (2064) is slidably connected to the guide groove (2043), the sliding sleeve (2063) is slidably connected to the inner wall of the screw chamber (206), and the output end of the first motor (2061) is fixedly connected to the double-headed screw (2062).

5. The ventilation device for vegetable greenhouses according to claim 1, characterized in that: The ventilation plate (202) and the misalignment plate (204) have the same width, and the ventilation plate (202) is fitted into the mounting frame (201).

6. The ventilation device for vegetable greenhouses according to claim 2, characterized in that: The installation mechanism (3) includes a hook-shaped locking block (301), and a crank (302) is fixedly connected to the outside of the hook-shaped locking block (301). The inner side of the mounting frame (201) near the outside is symmetrically provided with hook grooves (303). The hook-shaped locking block (301) is inserted into the hook grooves (303) with a small interference fit.

7. The ventilation device for vegetable greenhouses according to claim 6, characterized in that: The hook-shaped locking block (301) and the ventilation plate (202) are rotatably connected by a damping shaft, and the damping shaft is connected through the insect net (203).

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