A ventilation device for a greenhouse for vegetable planting

Abstract

The utility model relates to ventilation device technical field, concretely is a greenhouse ventilation device for vegetable planting, its solution traditional ventilation device single ventilation position leads to the problem that the air in the shed flows, including wall body, be provided with the air hole on the wall body, install the ventilation fan in the air hole, the inboard of wall body is installed for the cover body for surrounding ventilation fan one side, the cover body is rotatably installed with the flow guide pipe, the flow guide pipe is bent and sets up, one end of flow guide pipe is rotatably connected with the cover body, the other end of flow guide pipe is the free end, the height of rotatable flow guide pipe its free end will change, be provided with the air inlet on the free end of flow guide pipe, the air inlet is flared and sets up, be provided with the sleeve on the cover body, the top silk is connected on the sleeve through screw thread, the screwing end of top silk can be with the outer wall of flow guide pipe abuts, be provided with a plurality of top silk can insert the positioning hole on the outer wall of flow guide pipe, the outer wall of flow guide pipe is fixedly provided with the handle.

Description

Technical Field

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

[0002] With the rapid development of modern agriculture, greenhouses have become important facilities for large-scale, off-season vegetable cultivation. To maintain a good air environment inside the greenhouse and ensure the normal growth of vegetables, ventilation devices have become an indispensable component. Currently, most traditional greenhouse ventilation devices are fixedly installed on the side walls of the greenhouse, using ventilation fans to exchange air between the inside and outside of the greenhouse.

[0003] However, existing ventilation fans have significant technical limitations. Firstly, their ventilation positions are relatively fixed, making it difficult to adjust them flexibly according to actual needs. For example, in the morning, the temperature difference between inside and outside the greenhouse is large. If ventilation is directly provided through the side ventilation devices, cold air will quickly rush into the greenhouse, causing a sharp drop in temperature. In low-temperature environments, vegetable seedlings experience inhibited physiological metabolism, weakened disease resistance, and are highly susceptible to frost damage and various diseases, affecting normal plant growth and development, and even causing large-scale yield reductions. Secondly, during the midday heat, the air temperature inside the greenhouse is excessively high, humidity is high, and carbon dioxide concentration is low. At this time, vegetable photosynthesis is vigorous, significantly increasing the demand for fresh air. However, existing fixed-position ventilation devices, due to their limited ventilation rate and range, cannot quickly and effectively remove the hot and humid air and replenish fresh air, failing to meet the growth needs of vegetables in high-temperature environments, thus affecting vegetable yield and quality. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a ventilation device for greenhouses used in vegetable cultivation, which solves the problem of airflow issues caused by the single ventilation location of traditional ventilation devices.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a greenhouse ventilation device for vegetable cultivation, comprising a wall, on which ventilation holes are provided, and a ventilation fan is installed inside the ventilation holes. A cover for surrounding one side of the ventilation fan is installed on the inner side of the wall, and a guide pipe is rotatably installed on the cover. The guide pipe is bent, one end of the guide pipe is rotatably connected to the cover, and the other end of the guide pipe is a free end. Rotating the guide pipe will change the height of its free end.

[0008] Furthermore, an air inlet is provided on the free end of the guide tube, and the air inlet is flared.

[0009] Furthermore, the cover is provided with a sleeve, and a set screw is connected to the sleeve by a thread. The screw-in end of the set screw can abut against the outer wall of the guide tube. The outer wall of the guide tube is provided with a number of positioning holes into which the set screw can be inserted.

[0010] Furthermore, a handle is fixedly installed on the outer wall of the guide tube.

[0011] Furthermore, the ventilation fan includes a drive motor and fan blades mounted on the rotating end of the drive motor.

[0012] Furthermore, a mounting bracket is provided inside the vent for installing an exhaust fan.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a ventilation device for greenhouses used in vegetable cultivation, which has the following beneficial effects:

[0015] This greenhouse ventilation device for vegetable cultivation, through the design of a cover and a guide pipe, with the guide pipe rotatably connected to the cover, allows for flexible adjustment of the height of the free end according to environmental needs at different times. For example, in the morning, the free end of the guide pipe is rotated to the top of the greenhouse, prioritizing the replacement of air at the top and preventing cold air from directly affecting the vegetable seedlings. This allows the temperature inside the greenhouse to drop gradually, reducing the risk of frost damage and disease to the seedlings caused by sudden temperature changes, and ensuring healthy plant growth. At midday when temperatures are high, the free end of the guide pipe is adjusted to a lower position, allowing fresh air at a suitable outside temperature to directly act around the seedlings, quickly replenishing carbon dioxide and removing hot and humid air, significantly improving ventilation efficiency, meeting the needs of vegetable photosynthesis, and increasing crop yield and quality. Attached Figure Description

[0016] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the present invention without the cover installed.

[0019] In the diagram: 1. Wall; 2. Vent hole; 3. Mounting bracket; 4. Drive motor; 5. Fan blade; 6. Cover; 7. Guide pipe; 8. Air inlet; 9. Sleeve; 10. Handle; 11. Set screw. Detailed Implementation

[0020] 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, those skilled in the art who have not made any innovative embodiments are all within the protection scope of the present utility model.

[0021] Please see Figure 1-3 The present invention relates to a greenhouse ventilation device for vegetable cultivation, comprising a wall 1, a ventilation hole 2 provided on the wall 1, a ventilation fan installed in the ventilation hole 2, the ventilation fan comprising a drive motor 4 and a fan blade 5 installed on the rotating end of the drive motor 4, and a mounting bracket 3 provided in the ventilation hole 2 for installing the ventilation fan.

[0022] A cover 6 is installed on the inner side of the wall 1 to surround one side of the ventilation fan. A guide pipe 7 is rotatably mounted on the cover 6. The guide pipe 7 is bent, with one end rotatably connected to the cover 6 and the other end being a free end. An air inlet 8 is provided on the free end of the guide pipe 7. The air inlet 8 is flared, and the height of the free end of the guide pipe 7 will change when the guide pipe 7 is rotated. A sleeve 9 is provided on the cover 6, and a set screw 11 is threadedly connected to the sleeve 9. The screw-in end of the set screw 11 can abut against the outer wall of the guide pipe 7. Several positioning points for the set screw 11 are provided on the outer wall of the guide pipe 7. After the set screw 11 is tightened, the position of the guide pipe 7 is positioned. A handle 10 is fixedly provided on the outer wall of the guide pipe 7 to facilitate the rotation of the guide pipe by the operator.

[0023] In summary, when using this greenhouse ventilation device for vegetable cultivation, after sunrise when ventilation is needed, the free end of the guide pipe 7 is rotated upwards to the top of the greenhouse, and then the position of the guide pipe 7 is fixed by the top screw 11. The ventilation fan is then turned on to prioritize the replacement of the hot air at the top of the greenhouse, avoiding cold air blowing directly on the seedlings and preventing a sudden drop in temperature.

[0024] When the temperature inside the greenhouse is high at midday, rotate the free end of the guide pipe 7 downwards until it is close to the height of the seedlings, so that fresh air at a suitable temperature outside can directly act on the plants to quickly cool them down and replenish oxygen.

[0025] Staff can manually adjust the height and angle of the guide pipe 7 at any time according to weather changes, temperature and humidity inside the greenhouse and the growth stage of the vegetables to ensure the best ventilation effect.

[0026] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a greenhouse for vegetable cultivation, comprising a wall (1), wherein ventilation holes (2) are provided on the wall (1), and ventilation fans are installed in the ventilation holes (2), characterized in that: The inner side of the wall (1) is equipped with a cover (6) for surrounding one side of the ventilation fan. A guide pipe (7) is rotatably installed on the cover (6). The guide pipe (7) is bent. One end of the guide pipe (7) is rotatably connected to the cover (6). The other end of the guide pipe (7) is a free end. The height of the free end of the guide pipe (7) will change when the guide pipe (7) is rotated.

2. The greenhouse ventilation device for vegetable cultivation according to claim 1, characterized in that: An air inlet (8) is provided on the free end of the guide pipe (7), and the air inlet (8) is flared.

3. The greenhouse ventilation device for vegetable cultivation according to claim 2, characterized in that: The cover (6) is provided with a sleeve (9), and a set screw (11) is connected to the sleeve (9) by a thread. The screw-in end of the set screw (11) can abut against the outer wall of the guide tube (7). Several positioning holes for the set screw (11) to be inserted are provided on the outer wall of the guide tube (7).

4. The greenhouse ventilation device for vegetable cultivation according to claim 3, characterized in that: A handle (10) is fixedly installed on the outer wall of the guide tube (7).

5. A greenhouse ventilation device for vegetable cultivation according to any one of claims 1-4, characterized in that: The ventilation fan includes a drive motor (4) and fan blades (5) mounted on the rotating end of the drive motor (4).

6. The ventilation device for vegetable cultivation greenhouses according to claim 5, characterized in that: An installation bracket (3) is provided inside the ventilation hole (2) for installing the ventilation fan.

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