Novel light-color stripe sunshade net for sunlight greenhouse

Abstract

The invention discloses a novel light-color stripe sunshade net for a sunlight greenhouse, and belongs to the technical field of daytime radiation refrigeration. According to the invention, shading stripe layers are arranged on a substrate shading net side by side at intervals in an array mode, and each shading stripe layer comprises a radiation refrigeration coating and a near-infrared light blocking coating which are sequentially arranged from top to bottom. The invention aims at solving the problems that the sunshade net meets the dual requirements of cooling and light transmission, the performance is stable, the light can be adjusted, and the sunshade net is universal in multiple scenes, provides a more efficient and convenient technology for the cooling requirement of the current sunlight greenhouse under the high-temperature climate, and has important significance for promoting energy conservation and consumption reduction of facility agriculture.

Description

Technical Field

[0001] The invention relates to a novel light-colored patterned sunshade net for a solar greenhouse, belonging to the technical field of daytime radiation refrigeration. Background Art

[0002] Currently, solar greenhouses have shown significant advantages in improving production efficiency, optimizing plant yields and improving product quality by controlling plant growth and the surrounding environment, becoming an important tool for addressing food security challenges.

[0003] The greenhouse microclimate has a profound impact on the growth of crops. In order to prevent plants from being burned by direct sunlight, the greenhouse needs to be shaded during strong light hours in summer. The traditional method is to cover the greenhouse with dark (black) shade nets to achieve cooling in the greenhouse. However, the black net is suitable for short-term covering, and it will cause insufficient light in the greenhouse for a long time, especially for light-loving plants (tomatoes, cucumbers, etc.). Insufficient light can easily lead to a decrease in yield or pests and diseases. In addition, in order to achieve the effect of shading and cooling, the black shade net can only be used outside the greenhouse, and the use scene requirements are relatively high. On the contrary, the light-colored (white) shade net is more suitable for covering the entire growth period of light-loving plants, and can be used in the greenhouse due to the characteristics of not absorbing solar radiation. However, the shading effect of the light-colored shade net on the market is not as good as that of the black shade net, which can only reach about 30% to 50%, and the temperature effect on the greenhouse is not as stable as that of the black shade net. In addition, the change of light intensity during the day causes the demand for shading intensity inside the greenhouse to change dynamically. Therefore, greenhouse managers need to reasonably adjust the shading intensity according to the change of light intensity, plant species and growth stage to ensure the normal growth and development of plants. However, the current existing technology is not enough to achieve the flexible use of shading nets. Therefore, it is urgent to develop a new type of light-colored shading net that meets the dual needs of cooling and light transmission, with stable performance, adjustable light, and universal for multiple scenarios, in order to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of making the sunshade net meet the dual requirements of cooling and light transmission with stable performance, adjustable light, and universal use in multiple scenarios. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] The technical solution of the present invention:

[0006] A novel light-colored patterned sunshade net for a solar greenhouse comprises a base sunshade net on which a shading stripe layer is arranged in a side-by-side array at intervals, wherein the shading stripe layer comprises a radiation cooling coating and a near-infrared light blocking coating arranged in sequence from top to bottom.

[0007] Preferably, the base sunshade net is set to at least two layers when in use, and the overlapping degree of the shading stripe layers in the upper and lower layers of the base sunshade net is controlled by an electric retractable device, thereby realizing dimming control of the base sunshade net.

[0008] Preferably: it also includes a support frame and a slide rail, the support frame is buckled on the outside of the glass greenhouse, slide rails are set on the front and rear sides of the top of the support frame, electric retractable devices are set on the left and right sides of the top of the support frame, the front and rear sides of the two stacked base sunshade nets are slidably installed in the slide rails on both sides through sliders, and the right end of the upper base sunshade net and the left side of the lower base sunshade net are respectively connected to the electric retractable devices on both sides.

[0009] Preferably: the electric retractable device comprises a motor, a rotating shaft and a rotating seat, the motor is fixedly mounted on the support frame, both sides of the rotating shaft are rotatably mounted on the support frame through the rotating seat, the output end of the motor is connected to the rotating shaft, and the rotating shaft is fixedly connected to the base sunshade net.

[0010] Preferably, the near-infrared light blocking coating is a metal oxide coating, an infrared reflective coating layer or an organic polymer coating.

[0011] Preferably, the radiation cooling coating is a daytime radiation cooling coating, a daytime radiation cooling film, a daytime radiation cooling paint or a daytime radiation cooling fabric.

[0012] Preferably, the base sunshade net is a polyethylene base sunshade net, a polypropylene base sunshade net or a polyester fiber base sunshade net.

[0013] The present invention has the following beneficial effects:

[0014] 1. Based on the coupling with the daytime radiation cooling technology, the present invention innovatively proposes a "zebra pattern" structure that can be dimmed, that is, a shading stripe layer is arranged in an array on the base sunshade net at intervals, providing a new type of sunshade net with stable performance, dimmable light, and universal in multiple scenarios that meets the dual needs of cooling and light transmission. It provides a more efficient and convenient technology for the cooling needs of the current solar greenhouse in high temperature climates, which is of great significance to promoting energy conservation and consumption reduction in facility agriculture;

[0015] 2. The electric retractable device of the present invention realizes the temperature regulation effect of the solar greenhouse on the basis of meeting the light transmittance requirements, improves the flexibility, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of a new type of light-colored patterned sunshade net for a solar greenhouse;

[0017] Figure 2 This is the installation diagram of the base sunshade net and the shading stripe layer;

[0018] Figure 3 2 is a schematic diagram of the structure of the light-shielding stripe layer;

[0019] Figure 4 This is the installation diagram of the electric retractable device and the base sunshade net;

[0020] Figure 5 is a schematic diagram of the structure of the electric retractable device;

[0021] In the figure, 1 is a base sunshade net, 2 is a light-shielding stripe layer, 3 is a support frame, 4 is an electric retractable device, 5 is a slide rail, 6 is a glass greenhouse, 21 is a radiation cooling coating, 22 is a near-infrared light blocking coating, 41 is a motor, 42 is a rotating shaft, and 43 is a rotating seat. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0023] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0024] Specific implementation method 1: Combination Figure 1-Figure 5 The present embodiment is described. The novel light-colored patterned sunshade net for the solar greenhouse of the present embodiment comprises a base sunshade net 1 on which a shading stripe layer 2 is arranged in an array side by side and at intervals. The shading stripe layer 2 comprises a radiation cooling coating 21 and a near-infrared light blocking coating 22 arranged in sequence from top to bottom.

[0025] The design of the interval arrangement of the shading stripe layer 2 is combined with the daytime radiation cooling technology. The daytime radiation cooling technology can achieve the effect of lowering the temperature of an object without plugging in electricity or burning oil by strongly reflecting or scattering the energy of the solar band (0.3-2.5μm) and using the "atmospheric window" (8-13μm) to exchange heat with the universe with a temperature of -270℃ through radiation. It is a truly zero-energy, zero-pollution cooling technology.

[0026] The base sunshade net 1 is set to at least two layers when in use, and the overlapping degree of the shading stripe layer 2 in the upper and lower layers of the base sunshade net 1 is controlled by the electric retracting and releasing device 4, so as to realize the dimming control of the base sunshade net 1. The shading stripe layer 2 is used for shading, and the base sunshade net 1 located in the gap between adjacent shading stripe layers 2 is used for light transmission, which is convenient for adjusting the staggered coverage area and further adjusting the shading area, such as Figure 5 shown.

[0027] It also includes a support frame 3, an electric retractable device 4 and a slide rail 5. The support frame 3 is buckled on the outside of the glass greenhouse 6. The slide rails 5 are arranged on the front and rear sides of the top of the support frame 3. The electric retractable device 4 is arranged on the left and right sides of the top of the support frame 3. The front and rear sides of the two stacked base sunshade nets 1 are slidably installed in the slide rails 5 on both sides through sliders. The right end of the upper base sunshade net 1 and the left side of the lower base sunshade net 1 are respectively connected to the electric retractable devices 4 on both sides.

[0028] The base sunshade net 1 located in the gap between adjacent shading stripe layers 2 strongly reflects or scatters the energy of the sunlight band (0.3-2.5 μm), uses the "atmospheric window" (8-13 μm) to exchange energy with the outer space with a temperature of 3K through radiation heat exchange, uses the coating to reflect and absorb the near-infrared light band, and automatically retracts and rotates the sunshade net through a transmission device, thereby achieving the temperature control effect of the solar greenhouse on the basis of meeting the transmittance requirements, which is of great significance to promoting energy conservation and consumption reduction in facility agriculture.

[0029] The electric retractable device 4 includes a motor 41, a rotating shaft 42 and a rotating seat 43. The motor 41 is fixedly mounted on the support frame 3. Both sides of the rotating shaft 42 are rotatably mounted on the support frame 3 through the rotating seat 43. The output end of the motor 41 is connected to the rotating shaft 42, and the rotating shaft 42 is fixedly connected to the base sunshade net 1. The motor 41 drives the rotating shaft 42 to rotate, so as to realize the retractable and retractable base sunshade net 1. When the base sunshade net 1 is retracted, it is wound on the rotating shaft 42. By rotating the rotating shaft 42, the overlapping degree of the upper and lower light-shielding stripe layers 2 on the base sunshade net 1 is controlled, so as to realize the dimming effect after the sunshade net is covered. When the upper and lower light-shielding stripe layers 2 are completely overlapped, the light-shielding effect is optimal, and the light-transmitting effect is enhanced when they are partially or completely separated.

[0030] The near-infrared light blocking coating 22 is a metal oxide coating, an infrared reflective paint layer or an organic polymer coating.

[0031] The radiation cooling coating 21 is a daytime radiation cooling coating, a daytime radiation cooling film, a daytime radiation cooling paint or a daytime radiation cooling fabric, and is a main material used to improve the cooling performance of the sunshade net.

[0032] The base sunshade net 1 is a polyethylene base sunshade net, a polypropylene base sunshade net or a polyester fiber base sunshade net.

[0033] The basic working principle of this embodiment is as follows Figure 1 As shown, during the high temperature period in summer (such as when the temperature is higher than 30°C), an electric retractable device 4 is used to cover the base sunshade net 1 of the coupled radiation cooling technology on the upper part of the solar greenhouse between 10 am and 3 pm every day. The electric retractable device 4 is used to rotate the positions of different shading stripe layers 2 on the upper and lower base sunshade nets 1 to adjust and change the shading area of ​​the sunshade net, thereby further adjusting the light transmission requirements. While meeting the normal lighting requirements inside the greenhouse, a significant cooling effect on the solar greenhouse is achieved. After the shading is completed, the base sunshade net 1 can also be recovered by the electric retractable device 4.

[0034] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. New light-colored patterned sunshade net for solar greenhouse, characterized by: The invention comprises a base sunshade net (1) on which light-shielding stripe layers (2) are arranged in an array in parallel and at intervals, wherein the light-shielding stripe layer (2) comprises a radiation cooling coating (21) and a near-infrared light blocking coating (22) arranged in sequence from top to bottom; The base sunshade net (0) is arranged to have at least two layers when in use, and the overlapping degree of the light-shielding stripe layers (2) in the upper and lower layers of the base sunshade net (0) is controlled by an electric retractable device (4), thereby achieving dimming control of the base sunshade net (0).

2. The novel light-colored patterned sunshade net for a solar greenhouse according to claim 1, characterized in that: It also includes a support frame (3) and a slide rail (5), wherein the support frame (3) is buckled on the outside of the glass greenhouse (6), the slide rails (5) are arranged on the front and rear sides of the top of the support frame (3), and the left and right sides of the top of the support frame (3) are arranged with electric retractable devices (4), and the front and rear sides of the two-layer stacked base sunshade nets (0) are slidably installed in the slide rails (5) on both sides through sliders, and the right end of the upper base sunshade net (0) and the left side of the lower base sunshade net (0) are respectively connected to the electric retractable devices (4) on both sides.

3. The novel light-colored patterned sunshade net for solar greenhouse according to claim 2 is characterized by: The electric retractable device (4) comprises a motor (41), a rotating shaft (42) and a rotating seat (43); the motor (41) is fixedly mounted on the support frame (3); both sides of the rotating shaft (42) are rotatably mounted on the support frame (3) via the rotating seat (43); the output end of the motor (41) is connected to the rotating shaft (42), and the rotating shaft (42) is fixedly connected to the base sunshade net (0).

4. The novel light-colored patterned sunshade net for solar greenhouse according to any one of claims 1 to 3, characterized in that: The near-infrared light blocking coating (22) is a metal oxide coating, an infrared reflective paint layer or an organic polymer coating.

5. The novel light-colored patterned sunshade net for solar greenhouse according to any one of claims 1 to 3, characterized in that: The radiation cooling coating (21) is a daytime radiation cooling coating, a daytime radiation cooling film, a daytime radiation cooling paint or a daytime radiation cooling cloth.

6. The novel light-colored patterned sunshade net for solar greenhouse according to any one of claims 1 to 3, characterized in that: The base sunshade net (0) is a polyethylene base sunshade net, a polypropylene base sunshade net or a polyester fiber base sunshade net.

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