Greenhouse with precisely controlled automatic ventilation

Abstract

The utility model belongs to the technical field of greenhouse, disclose a kind of precision control ventilation opening automatic switch's greenhouse, including the greenhouse body, the cotton quilt being laid on the greenhouse body and the roller blind mechanism for controlling the winding and unwinding of cotton quilt, and the roller blind mechanism includes the roller blind rod for winding cotton quilt, and the length direction of greenhouse body is equipped with ventilation opening;At least one first positioner for identifying the position of roller blind rod is fixed on the greenhouse body, and the first positioner is located below 0~2 meters of ventilation opening, and the signal output end of first positioner is connected with the signal input end of roller blind mechanism.The utility model can accurately open or close ventilation opening, with high degree of automation, long service life, and is suitable for greenhouse automatic winding and unwinding cotton quilt.

Description

Technical Field

[0001] This utility model belongs to the field of greenhouse technology, and relates to a greenhouse with automatic opening and closing of ventilation openings, specifically a greenhouse with precise control of automatic opening and closing of ventilation openings. Background Technology

[0002] The two main factors for building a greenhouse are light and ventilation. Sufficient light promotes photosynthesis in plants, increasing yield, while proper ventilation regulates temperature, reduces humidity, replenishes fresh air, and reduces pests and diseases. In existing technologies, ventilation openings are installed at the top of the greenhouse. There are three main ways to open and close these openings: one is by sealing the opening with plastic film, with a long rod fixed to one end. A pull rope controls the position of the rod, opening or closing the opening. However, this structure requires manual control of the opening daily based on the greenhouse environment, resulting in poor automation. Another method is to use an automatic opening and closing device. This involves sealing the opening with plastic film, with a fixed long rod on one side. A pull rope controls the position of the rod, thus controlling the opening and closing of the film at the opening. However, both the pull rope and the plastic film are easily damaged, requiring frequent maintenance, and the fixed long rod is made of metal steel pipe, resulting in high manufacturing and maintenance costs. The third method uses a roller shutter machine to control the opening and closing of the ventilation opening by raising and lowering the quilt. The roller shutter machine moves the quilt to a position below the ventilation opening, closing the opening; it moves it to a position above the opening, opening it. This method controls the position of the quilt by controlling the time it takes for the roller shutter machine to raise and lower the opening. However, after long-term use, due to quilt deformation, loosening, or misalignment of the roller shutter rod, the roller shutter machine may not reset accurately, resulting in a deviation in the initial position. Therefore, the quilt may be rolled up to different positions within the same time frame, and the ventilation opening may not be completely closed or opened, resulting in poor accuracy. Utility Model Content

[0003] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a greenhouse with a precise control system for the automatic opening and closing of ventilation openings, thereby achieving the goal of precise and automatic control of ventilation opening openings.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A greenhouse with precise control of the automatic opening and closing of ventilation openings includes a greenhouse body, a cotton quilt laid on the greenhouse body, and a roller shutter mechanism for controlling the raising and lowering of the cotton quilt. The roller shutter mechanism includes a roller shutter rod for rolling up the cotton quilt, and ventilation openings are provided along the length of the greenhouse body.

[0006] At least one first locator for identifying the position of the roller shutter rod is fixed on the main body of the greenhouse. The first locator is located 0 to 2 meters below the ventilation opening, and the signal output end of the first locator is connected to the signal input end of the roller shutter mechanism.

[0007] As a limitation of this utility model, the first locator is 0.5 meters away from the ventilation opening.

[0008] As another limitation of this utility model, a second locator is also fixed at the bottom of the greenhouse body.

[0009] As a limitation of this utility model, the second locator is 0.1 to 2 meters away from the bottom of the greenhouse body.

[0010] As a further limitation of this utility model, both the first locator and the second locator are photoelectric sensors, laser sensors, ranging sensors, radar sensors, metal detectors, or light sensors.

[0011] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0012] (1) This utility model uses the first locator to identify the position of the roller shutter rod. When the roller shutter rod passes the first locator, the roller shutter mechanism is automatically calibrated and starts timing from zero. After the roller shutter mechanism drives the quilt through the set time, the vent is opened. When the vent needs to be closed, the roller shutter rod on the roller shutter mechanism first returns to the position of the first locator, and after the set time, the quilt moves to the bottom of the vent to close the vent. Each movement must return to the first locator for time calibration to ensure that the initial position of the roller shutter rod is always in the position of the first locator and will not cause deviation. Since the distance between the first locator and the vent is small, the error is small, and repeated calibration greatly improves the accuracy of opening and closing the vent.

[0013] (2) The roller blind mechanism of this utility model stops rolling the quilt after the second positioner continues to run for a set time, which improves the accuracy of the quilt completely covering the greenhouse body and increases the heat preservation effect at night.

[0014] In summary, this utility model can accurately open or close the ventilation opening, precisely position the closing opening, has a high degree of automation, and a long service life. It is suitable for automatically raising and lowering quilts in greenhouses, achieving automatic opening and closing of the curtain ventilation, and automatically regulating the temperature and humidity inside the greenhouse. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a side view of an embodiment of the present utility model.

[0017] In the diagram: 1. Greenhouse body; 2. Plastic film; 3. Roller shutter mechanism; 4. Roller shutter rod; 5. Cotton quilt; 6. Ventilation opening; 7. First positioner; 8. Second positioner. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0019] Example 1: A greenhouse with precise control over the automatic opening and closing of ventilation openings

[0020] like Figure 1 As shown, this embodiment includes a greenhouse body 1, a cotton quilt 5 laid on the greenhouse body 1, and a roller shutter mechanism 3 for controlling the raising and lowering of the cotton quilt 5. The greenhouse body 1, as in the prior art, is enclosed by a plastic film 2. Ventilation openings 6 are provided along the length of the greenhouse body 1, located at the top of the greenhouse body 1, with a width of 0.5 to 1 meter and a distance of 1 meter from the vertical plane of the greenhouse body 1. The roller shutter mechanism 3 is prior art and will not be described in detail. The roller shutter mechanism 3 includes a roller shutter rod 4 for rolling the cotton quilt 5. One end of the cotton quilt 5 is fixed to the top of the greenhouse body 1, and the other end is fixed to the roller shutter rod 4. After the roller shutter mechanism 3 is activated, it drives the roller shutter rod 4 to move along the curved surface of the greenhouse body 1, rolling the cotton quilt 5 onto the roller shutter rod 4.

[0021] At least one first locator 7 for identifying the position of the roller shutter rod 4 is fixed on the greenhouse body 1. Multiple first locators 7 can be provided to improve the accuracy of detection. In this embodiment, two first locators 7 are provided, located at both ends of the greenhouse body 1 respectively. The first locator 7 is located 0 to 2 meters below the ventilation opening 6, that is, 0 to 2 meters away from the lower edge of the ventilation opening 6. It can be 0.4 meters, 1 meter or 2 meters. In this embodiment, it is 0.5 meters. The signal output terminal of the first locator 7 is connected to the signal input terminal of the roller shutter mechanism 3. When the roller shutter rod 4 passes the first locator 7, the roller shutter mechanism 3 starts timing from zero and controls the position of the quilt 5 by the duration.

[0022] A second locator 8 is also fixed at the bottom of the greenhouse body 1. The second locator 8 is 0.1 to 2 meters away from the bottom of the greenhouse body 1, which can be 0.1 meters, 0.5 meters, 1 meter or 2 meters. In this embodiment, it is 0.5 meters away. Both the first locator 7 and the second locator 8 are photoelectric sensors, laser sensors, distance sensors, radar sensors, metal detectors or light sensors. In this embodiment, both the first locator 7 and the second locator 8 are photoelectric sensors.

[0023] The principle of this embodiment is as follows: When sunlight is needed during the day, the roller blind mechanism 3 is activated, and the cotton quilt 5 is rolled onto the roller blind rod 4. When the roller blind mechanism 3 moves the roller blind rod 4 to the position of the first locator 7, the roller blind mechanism 3 starts timing from zero. If the ventilation opening 6 needs to be opened according to the temperature and humidity inside the greenhouse, the roller blind mechanism 3 moves for fifteen seconds and stops rolling the cotton quilt 5 to the position where the upper edge of the ventilation opening 6 is exposed. If the ventilation opening 6 does not need to be opened according to the temperature and humidity inside the greenhouse, the roller blind mechanism 3 moves for five seconds and rolls the cotton quilt 5 to the position near the lower edge of the ventilation opening 6 to ensure sufficient sunlight. If the ventilation opening 6 needs to be closed after a period of ventilation, the roller blind mechanism 3 moves in the opposite direction back to the position of the first locator 7. After the first locator 7 detects the roller blind rod 4, the roller blind mechanism 3 starts timing from zero and moves forward for five seconds to roll the cotton quilt 5 to the position near the lower edge of the ventilation opening 6, thus closing the ventilation opening 6 and ensuring sunlight between the ventilation opening 6 and the first locator 7. Regardless of whether the vent 6 is opened or closed, the roller blind mechanism 3 needs to return to the position of the first positioner 7. After returning to the position of the first positioner 7, the roller blind mechanism 3 starts timing from zero and drives the quilt 5 to the position of opening or closing the vent 6 according to the instruction. This method not only shortens the movement path after timing and reduces deviation, but also recalibrates the position of the roller blind rod, improving the accuracy of movement. No matter what cause the roller blind rod 4 to deviate, timing only starts from zero after reaching the position of the first positioner 7, keeping its initial position fixed and greatly improving the accuracy of movement. In the prior art, the initial position of the roller blind rod 4 is determined by setting the movement time of the roller blind rod 4. However, due to various reasons, the position of the roller blind rod 4 reaching the initial state is different each time. Therefore, the position of the quilt 5 reached in the same amount of time is different, resulting in the inability to completely seal or open the vent 6. This embodiment effectively overcomes this defect, ensuring that the initial position remains unchanged and improving accuracy.

[0024] When the quilt 5 needs to be completely lowered at night, the roller shutter mechanism 3 drives the roller shutter rod 4 to move in the opposite direction until it reaches the position of the second positioner 8. Then the timer starts and stops after three seconds, completely covering the greenhouse and ensuring the temperature inside the greenhouse.

[0025] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A greenhouse with precise control over the automatic opening and closing of ventilation openings, characterized in that: It includes the greenhouse body, cotton quilts laid on the greenhouse body, and a roller shutter mechanism for controlling the opening and closing of the cotton quilts. The roller shutter mechanism includes a roller shutter rod for rolling up the cotton quilts. Ventilation openings are provided along the length of the greenhouse body. At least one first locator for identifying the position of the roller shutter rod is fixed on the main body of the greenhouse. The first locator is located 0 to 2 meters below the ventilation opening, and the signal output end of the first locator is connected to the signal input end of the roller shutter mechanism.

2. A greenhouse with precise control of automatic opening and closing of ventilation openings according to claim 1, characterized in that: The first locator is 0.5 meters away from the ventilation opening.

3. A greenhouse with precise control of automatic opening and closing of ventilation openings according to claim 1 or 2, characterized in that: A second locator is also fixed at the bottom of the greenhouse body.

4. A greenhouse with precise control of automatic opening and closing of ventilation openings according to claim 3, characterized in that: The second locator is located 0.1 to 2 meters from the bottom of the greenhouse body.

5. A greenhouse with precise control of automatic opening and closing of ventilation openings according to claim 4, characterized in that: Both the first locator and the second locator are photoelectric sensors, laser sensors, ranging sensors, radar sensors, metal detectors, or light sensors.

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