Novel greenhouse top ventilation system

Abstract

The utility model relates to a novel greenhouse top ventilation system which comprises a north wall inner-layer framework, a north wall outer-layer framework, a south slope framework, a north slope arc-shaped framework, a north slope outer window, a north slope inner window, a north slope inner support, a north slope inner heat preservation plate, a north slope lower wind shielding support and a north slope lower wind shielding film. The greenhouse top ventilation system is provided with the north slope outer window, the north slope inner window and the north slope lower wind shielding film and is not affected by winding and unwinding of the south slope electric roll, and ventilation can be achieved even if the south slope electric roll is completely covered. The north slope lower wind shielding film can change the direction of cold air when the cold air enters the greenhouse through the north slope inner window, and can enable the cold air to be fully mixed with warm air in the greenhouse and then enter the greenhouse, so that plants below the wind port are prevented from being influenced by low temperature. The north slope outer window and the north slope inner window do not need to use a film pressing rope to press a small film, and plant diseases caused by water dripping or rain leakage are avoided. The ventilation device is good in ventilation effect, reliable in performance and low in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse technology, specifically to a novel greenhouse roof ventilation system. Background Technology

[0002] Solar greenhouses have solved the problem of winter vegetable production in northern regions. The traditional structure of a solar greenhouse is three walls and one slope. The slope is usually covered with plastic film or glass to allow sunlight to pass through and raise the temperature during the day, while the three walls primarily serve to store and insulate heat. From the initial design stage, the ventilation openings at the top of the slope are placed. However, traditional solar greenhouse top ventilation structures have the following problems in achieving ventilation:

[0003] (1) Currently, the ventilation openings at the top of the greenhouse are usually located on the south-facing slope, and ventilation can only be carried out after the cotton quilt is completely rolled up over the opening. During the transition from winter to spring (March-April) and from autumn to winter (November-December), in order to maintain the nighttime temperature inside the greenhouse, the cotton quilt is often only rolled up halfway. In this case, because the opening cannot ventilate effectively, the nighttime humidity inside the greenhouse remains too high, causing condensation on the plants in the front half, and the excessive humidity leads to a large number of plant diseases. In addition, when the cotton quilt is not rolled up straight and partially blocks the opening, the opening cannot be opened normally. When the cotton quilt covers the opening but does not exceed the maximum opening position, it will also affect the normal operation of the opening. Due to improper control of the cotton quilt covering the opening, the motor is often overloaded and damaged when the opening is opened.

[0004] (2) Currently, the ventilation openings at the top of greenhouses are generally constructed by overlapping two pieces of plastic film. This method causes condensation from the smaller piece of film to drip from the overlap, directly onto the leaves of the plants below, leading to disease. Furthermore, existing ventilation openings require the use of film-pressing ropes to hold down the smaller piece of film to prevent wind damage. After prolonged opening and closing operations, this design can cause friction damage between the smaller piece of film and the film-pressing ropes, resulting in dripping or leaks. This water dripping onto the plant leaves can also cause disease.

[0005] (3) The existing greenhouse top ventilation openings are generally located directly above the plants. During the winter low-temperature season (December to February of the following year), when ventilation is carried out, the cold air outside the greenhouse will always directly contact the plants below the ventilation openings, causing the plants below the ventilation openings to be affected by low temperatures and grow poorly.

[0006] (4) There are plants directly below the ventilation openings on the top of the existing greenhouse. They must be closed when it rains to prevent rain. If they are not closed in time, water will form on the small film, damaging the film and causing the plants under the vents to get wet, which can easily lead to diseases. In the summer rainy season (July-August), if the ventilation openings are closed for a long time, the humidity inside the greenhouse will be too high, which can lead to diseases.

[0007] The aforementioned problems account for over 60% of the annual plant diseases occurring in greenhouses, severely hindering the development of the vegetable industry towards healthier, higher-quality products. Therefore, a greenhouse roof ventilation system with good ventilation, reliable performance, and low maintenance costs is needed. Utility Model Content

[0008] In order to solve the above problems, the purpose of this utility model is to provide a new type of greenhouse roof ventilation system.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a novel greenhouse roof ventilation system, comprising an inner frame of the north wall, an outer frame of the north wall, a south slope frame, a north slope arc-shaped frame, an outer window on the north slope, an inner window on the north slope, an inner support on the north slope, an inner insulation board on the north slope, a windbreak support on the lower north slope, and a windbreak membrane on the lower north slope; the inner and outer frames of the north wall are arranged inclined and parallel, and are fixed by connecting frames; a north wall insulation board is installed on the outer frame of the north wall; and multiple outer windows on the north slope are arranged along the east-west direction above the outer frame of the north wall. The window is connected to the arched frame of the north slope above the outer frame of the north wall. The arched frame of the north slope is also connected to the frame of the south slope. An inner support of the north slope is installed at an angle below the outer window of the north slope. Multiple openable inner windows of the north slope are installed on the inner support of the north slope along the east-west direction. Inner insulation boards of the north slope are installed on the upper and lower sides of the inner windows of the north slope. A lower windbreak support of the north slope is installed at an angle below the inner insulation boards of the north slope. A lower windbreak film of the north slope is installed on the lower windbreak support of the north slope. The lower windbreak film of the north slope is opened or rolled up on the lower windbreak support of the north slope by an electric roller.

[0010] Furthermore, a north wall quilt is provided outside the north slope window, and a bottom film of the north wall quilt is provided at the bottom of the north wall quilt. The north wall quilt and the bottom film of the north wall quilt are rolled on a roller, and the roller is driven to rotate by a roller shutter machine, thereby causing the north wall quilt and the bottom film of the north wall quilt to unfold or rewind.

[0011] Furthermore, insect-proof netting was installed on the exterior windows of the north slope.

[0012] Furthermore, an electric blanket roller is also installed on the south slope frame.

[0013] Furthermore, the north-slope inner window is controlled to open and close via a gear and rack power drive mechanism. The gear and rack power drive mechanism includes a motor, a gear, and a rack. The bottom end of the north-slope inner window is rotatably connected to the north-slope inner support. The motor is fixed below the north-slope inner support, and a gear is installed on the output shaft of the motor. The bottom end of the rack meshes with and slides with the gear, and the top end of the rack is fixed to the north-slope inner window. By driving the gear to rotate forward and backward by the motor, the rack moves up and down, thereby realizing the opening and closing of the north-slope inner window.

[0014] Furthermore, the inner and outer frames of the north wall are arranged in parallel, and the angle α between the inner and outer frames of the north wall and the ground is 95°.

[0015] Furthermore, the top of the inner support on the north slope is connected to the frame on the south slope, and the bottom of the inner support on the north slope is connected to the outer frame of the north wall.

[0016] Furthermore, the windbreak support on the north slope includes multiple first rods and multiple second rods. The top of each second rod is connected to the south slope frame and is located below the inner support on the north slope. The bottom of each second rod is connected to the first rod. The top of the first rod is connected to the south slope frame, and the bottom of the first rod is connected to the inner frame of the north wall.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The greenhouse roof ventilation system of this utility model is equipped with an outer window on the north slope, an inner window on the north slope, and a windbreak film at the bottom of the north slope. This ventilation system is an independent ventilation system from the electric rolling quilt on the south slope. It is not affected by the rolling and unrolling of the electric rolling quilt on the south slope. Even if the electric rolling quilt on the south slope is completely covered, the greenhouse can still be ventilated.

[0019] 2. The inner and outer frames of the north wall of the greenhouse roof ventilation system of this utility model are set at an angle and parallel to each other, that is, the north slope windows are set at an angle. Therefore, even when it is opened in rainy weather, rainwater will not enter the greenhouse and ventilation is not affected by the weather.

[0020] 3. The windbreak film on the north slope of this utility model can change the direction of cold air when it enters the greenhouse through the inner window on the north slope, and can also make the cold air fully mix with the warm air in the greenhouse before entering, reducing the direct impact of cold air on plants and avoiding the situation where plants below the vent are affected by low temperature and thus have poor growth.

[0021] 4. During the transition from winter to spring (March-April) and from autumn to winter (November-December), this utility model opens the outer window on the north slope and closes the inner window on the north slope. The inner window on the north slope and the insulation boards on the upper and lower sides of the north slope play a role in heat preservation of the rear slope of the greenhouse. This completely eliminates the need to cover half of the curtain when ventilating the south slope of the greenhouse, and prevents condensation on the plants on the front half of the greenhouse.

[0022] 5. The greenhouse roof ventilation system of this utility model eliminates the structure of two plastic film overlapping at the ventilation opening, which can prevent condensation from dripping onto the plants. In addition, the outer window and inner window on the north slope do not need to use film-pressing ropes to hold down the small film, avoiding plant diseases caused by dripping water or rain leakage.

[0023] 6. The north-slope exterior windows of the greenhouse roof ventilation system of this utility model are controlled by a roller shutter machine, the north-slope interior windows are controlled by a gear and rack power drive mechanism, and the north-slope lower windbreak film is controlled by an electric roller. The system is reliable, has an extremely low maintenance rate, and low maintenance costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the novel greenhouse roof ventilation system of this utility model;

[0025] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0026] In the diagram, 1. Inner frame of the north wall; 2. Outer frame of the north wall; 3. South slope frame; 31. Lower ventilation opening; 32. Bottom membrane; 33. Greenhouse film; 34. Insect net; 35. Downwind roll-up film; 4. North slope arc-shaped frame; 5. North wall insulation board; 6. North slope exterior window; 7. North slope interior window; 8. North slope interior support; 9. North slope interior insulation board; 10. North slope lower windbreak support; 101. First pole; 102. Second pole; 11. North slope lower windbreak film; 12. Roller; 13. Roller shutter machine; 14. Insect net; 15. Electric quilt roller; 16. Motor; 17. Gear; 18. Rack; 19. Electric roller; 20. North wall quilt; 21. North wall quilt lower film; 22. Connecting frame. Detailed Implementation

[0027] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0028] like Figure 1 - Figure 2 As shown, a novel greenhouse roof ventilation system includes an inner north wall frame 1, an outer north wall frame 2, a south slope frame 3, a north slope arc-shaped frame 4, a north slope outer window 6, a north slope inner window 7, a north slope inner support 8, a north slope inner insulation board 9, a north slope lower windbreak support 10, and a north slope lower windbreak film 11. The inner north wall frame 1 and the outer north wall frame 2 are inclined and parallel, and are fixed by a connecting frame 22. A north wall insulation board 5 is installed on the outer north wall frame 2. Multiple north slope outer windows 6 are provided along the east-west direction above the outer north wall frame 2. The north slope arc-shaped frame 4 is connected to the south slope frame 3. An inner support 8 is inclinedly installed below the north slope outer window 6. Multiple openable inner windows 7 are provided on the inner support 8 along the east-west direction. Inner insulation boards 9 are installed on the upper and lower sides of the inner windows 7. A lower windbreak support 10 is inclinedly installed below the inner insulation board 9. A lower windbreak film 11 is installed on the lower windbreak support 10. The lower windbreak film 11 is driven to unfold or rewind on the lower windbreak support 10 by an electric roller 19.

[0029] A north wall quilt 20 is provided outside the north slope window 6. A north wall quilt lower film 21 is provided at the bottom of the north wall quilt 20. The north wall quilt 20 and the north wall quilt lower film 21 are rolled on a roller 12 and the roller 12 is driven to rotate by a roller shutter machine 13, thereby causing the north wall quilt 20 and the north wall quilt lower film 21 to be unfolded or rolled up.

[0030] An insect-proof net 14 is installed on the north-facing exterior window 6.

[0031] An electrically operated quilt roll 15 is also installed on the south slope frame 3. Multiple lower ventilation openings 31 are provided along the east-west direction at the bottom of the south slope frame 3. A bottom lining film 32 is installed on the south slope frame 3 below the lower ventilation openings 31, and a greenhouse film 33 is installed on the south slope frame 3 above the lower ventilation openings 31. The tops of the electrically operated quilt roll 15 and the greenhouse film 33 are both fixed to the top of the north slope arc-shaped frame 4. Insect-proof netting 34 and downwind vent roll film 35 are installed sequentially from the inside to the outside of the lower ventilation openings 31.

[0032] The north-slope inner window 7 is controlled to open and close via a gear and rack power drive mechanism, which includes a motor 16, a gear 17, and a rack 18. The bottom end of the north-slope inner window 7 is rotatably connected to the north-slope inner support 8. The motor 16 is fixed below the north-slope inner support 8. The gear 17 is mounted on the output shaft of the motor 16. The bottom end of the rack 18 meshes with and slides with the gear 17. The top end of the rack 18 is fixed to the north-slope inner window 7. The motor 16 drives the gear 17 to rotate forward and backward, thereby moving the rack 18 up and down, thus realizing the opening and closing of the north-slope inner window 7.

[0033] The inner frame 1 and outer frame 2 of the north wall are arranged in parallel, and the angle α between the inner frame 1 and the outer frame 2 and the ground is 95°. This tilt angle design ensures that rainwater will not enter the greenhouse when the north slope window 6 is opened during rainy weather, and the window can be opened normally during rainy weather to achieve ventilation inside and outside the greenhouse.

[0034] The top of the inner support 8 on the north slope is connected to the frame 3 on the south slope, and the bottom of the inner support 8 on the north slope is connected to the outer frame 2 of the north wall.

[0035] The windbreak support 10 on the north slope includes multiple first rods 101 and multiple second rods 102. The top of each second rod 102 is connected to the south slope frame 3 and is located below the inner support 8 on the north slope. The bottom of each second rod 102 is connected to the first rod 101. The top of the first rod 101 is connected to the south slope frame 3, and the bottom of the first rod 101 is connected to the inner frame 1 of the north wall. One end of the lower quilt film 21 on the north wall is fixed along the east-west direction at the connection between the first rod 101 and the second rod 102, and the other end is wound onto the electric roller 19.

[0036] The top of the north wall quilt 20 is fixed to the top of the north slope arc frame 4, and the top of the north wall quilt lower film 21 is fixed to the bottom of the north slope arc frame 4. The bottoms of the north wall quilt 20 and the north wall quilt lower film 21 are both rolled up on the roller 12.

[0037] The north wall quilt 20 and the lower film 21 of this invention are installed outside the north slope outer window 6 and are jointly opened and closed by the roller shutter machine 13, forming the first layer of ventilation structure for the greenhouse. The north slope inner window 7 is opened and closed by a gear and rack power drive mechanism, forming the second layer of ventilation structure for the greenhouse. At the same time, when the north slope inner window 7 is closed, it together with the north slope inner insulation panels 9 on its upper and lower sides constitutes the insulation structure inside the north wall quilt 20 of the greenhouse. When the third layer, the north slope lower windbreak film 11, is rolled up, it forms the third layer of ventilation structure, enabling ventilation. When unfolded, the north slope lower windbreak film 11 can block the cold air entering the greenhouse from the north slope inner window 7 and fully mix it with the warm air inside the greenhouse, avoiding the direct impact of cold air on the plants.

[0038] The greenhouse roof ventilation system of this utility model has a three-layer structure and can be relatively independent of the rolling and unrolling of the electric blanket 15 on the south slope of the greenhouse. They do not affect each other and can work independently.

[0039] When ventilation is needed, the roller shutter 13 drives the roller shaft 12 to rotate, causing the north wall quilt 20 and the lower film 21 of the north wall quilt to roll upwards, opening the north slope exterior window 6 for the first layer of ventilation. Depending on the temperature inside the greenhouse, the motor 16 drives the gear 17 to rotate forward and backward, thereby adjusting the opening angle of the rack 18 and the north slope interior window 7 to achieve the second layer of ventilation. The insect net 14 prevents external insects from entering the greenhouse during ventilation. When the temperature inside the greenhouse drops and the vents need to be closed, the second-layer north slope interior window 7 is closed first. When the minimum outside temperature is ≥-5℃, the first-layer north slope exterior window 6 does not need to be closed; when the minimum outside temperature is <-5℃, the north slope exterior window 6 needs to be closed.

[0040] During the transition from winter to spring (March-April) and from autumn to winter (November-December), the outer window 6 on the north slope of the first-layer ventilation structure is opened, and the inner window 7 on the north slope of the second-layer ventilation structure is closed. The inner window 7 on the north slope and the inner insulation boards 9 on the north slope above and below it can provide insulation for the back slope of the greenhouse. At this time, the electric roll-up blanket 15 on the south slope can be completely lowered to close the lower ventilation opening 31 on the south slope, thus preventing condensation on the plants in the front half of the greenhouse.

[0041] It is understood that, although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 novel greenhouse roof ventilation system characterized in that, The system includes an inner frame for the north wall, an outer frame for the north wall, a south slope frame, a north slope curved frame, north slope exterior windows, north slope interior windows, a north slope internal support, a north slope internal insulation board, a north slope lower windbreak support, and a north slope lower windbreak membrane. The inner and outer frames for the north wall are inclined and parallel, and fixed by connecting frames. A north wall insulation board is installed on the outer frame. Multiple north slope exterior windows are located above the outer frame in an east-west direction. The outer frame is aligned with the north slope curved frame. The north slope arc-shaped frame is connected to the south slope frame. An inner support frame for the north slope is installed at an angle below the outer window of the north slope. Multiple openable inner windows for the north slope are installed on the inner support frame along the east-west direction. Inner insulation boards for the north slope are installed on the upper and lower sides of the inner windows for the north slope. A lower windbreak support frame for the north slope is installed at an angle below the inner insulation boards for the north slope. A lower windbreak film for the north slope is installed on the lower windbreak support frame for the north slope. The lower windbreak film for the north slope is opened or rolled up on the lower windbreak support frame for the north slope by an electric roller.

2. The novel greenhouse roof ventilation system as described in claim 1, characterized in that, A north wall quilt is installed outside the north-slope window. A bottom film of the north wall quilt is installed at the bottom of the north wall quilt. The north wall quilt and the bottom film of the north wall quilt are rolled on a roller. The roller is driven to rotate by a roller shutter machine, thereby causing the north wall quilt and the bottom film of the north wall quilt to unfold or rewind.

3. A novel greenhouse roof ventilation system as claimed in claim 1, characterized in that, Insect-proof netting is installed on the exterior windows of the north slope.

4. A novel greenhouse roof ventilation system as claimed in claim 1, characterized in that, An electric blanket roller is also installed on the south slope frame.

5. A novel greenhouse roof ventilation system as claimed in claim 1, characterized in that, The north-slope inner window is controlled to open and close via a gear and rack power drive mechanism, which includes a motor, gears, and a rack. The bottom end of the north-slope inner window is rotatably connected to the north-slope inner support. The motor is fixed below the north-slope inner support, and a gear is mounted on the output shaft of the motor. The bottom end of the rack meshes with and slides with the gear, and the top end of the rack is fixed to the north-slope inner window. The motor drives the gear to rotate forward and backward, causing the rack to move up and down, thereby realizing the opening and closing of the north-slope inner window.

6. A new type of greenhouse roof ventilation system as claimed in claim 1, characterized in that The inner and outer frames of the north wall are arranged in parallel, and the angle α between the inner and outer frames and the ground is 95°.

7. A novel greenhouse roof ventilation system as described in claim 1, characterized in that, The top of the inner support on the north slope is connected to the frame on the south slope, and the bottom of the inner support on the north slope is connected to the outer frame of the north wall.

8. A novel greenhouse roof ventilation system as claimed in claim 1, characterized in that, The windbreak support on the north slope includes multiple first poles and multiple second poles. The top of each second pole is connected to the south slope frame and is located below the inner support on the north slope. The bottom of each second pole is connected to the first pole. The top of the first pole is connected to the south slope frame, and the bottom of the first pole is connected to the inner frame of the north wall.

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