CN2537210Y - Reflection energy saving sun shade curtain - Google Patents

Abstract

A reflective energy-saving sunshade curtain, comprising a curtain frame woven by radial threads and weft threads, transparent film strips and metal reflective film strips embedded in the curtain frame alternately and radially parallel, characterized in that: The metal reflective film strip is a composite reflective film strip with an aluminum layer in the middle and transparent protective layers on the top and bottom. The utility model is convenient to be folded and rolled up, has the advantages of small volume, light weight, good ventilation and air permeability, and long service life. Products with different shading ratios can be made as required. When the sun is hot in summer, using the utility model can reduce the temperature in the greenhouse by 4-7°C. When used in winter, it can reduce heat loss in the greenhouse, increase the indoor temperature by 5-8°C, and save energy by 50-80%.

Description

Reflective energy-saving sunshade curtains

Technical field:

The utility model relates to gardening facilities, in particular to sunshade curtains.

Background technique:

The glass greenhouse is an early gardening facility that uses transmitted sunlight and artificial heating to create an environment suitable for plant growth in the cold winter. Due to its heavy weight, high cost, and low utilization rate, it was previously limited to planting some precious flowers and trees or for scientific research. With the development of science and technology, bulky glass is gradually replaced by lightweight composite resin boards. Refrigeration technology and artificial microclimate control technology are constantly improving and advancing, and the annual utilization rate of greenhouses is also increasing. However, its cost and use cost are still quite high. , cannot be popularized in a large area in agricultural production. Due to the appearance of cheap, light-weight and light-transmitting plastic film, a simple greenhouse—plastic greenhouse has been widely used in the horticultural industry, especially in the cultivation of vegetables. Not only used in winter, but also become a production facility used all year round. Agricultural science has revealed that reducing the intensity of light radiation around noon has the effect of cooling down and reducing the rate of photosynthesis, which is very beneficial to the production of crops. As a result, various sunshade facilities that are matched with the greenhouse and used alone have appeared. They basically belong to two categories. One is the sunshade net with mesh structure. They usually use colored (mostly black) plastic ropes or narrow black Thick film strips formed. Part of the sunlight is transmitted through the mesh, and the rest is partially covered by the mesh rope. It has the advantages of simple structure and convenient manufacture. A large amount of heat energy affects the temperature in the greenhouse and is not conducive to temperature regulation. So although there is a certain shading and cooling effect, the effect is not ideal enough. But its cost is low, the price is cheap, and it is widely used in our country. Another kind is sunshade curtain, and it is to utilize the curtain frame that warp, weft intertwines to form a curtain on this curtain frame by embedding the narrow and long high transmittance and high reflectivity thin sheets parallel to each other. The commonly used high-transmittance sheet is cut from polyethylene film; while the high-reflectance sheet is light pure metal or coated aluminum foil. , good air permeability, no water accumulation, dripping water, especially aluminum foil, it not only blocks the passage of light, but also reflects most of the radiant heat energy of sunlight and absorbs very little. Therefore, it has less influence on the temperature in the room temperature and is convenient for artificial temperature control. Although it has a complex structure and high manufacturing cost, it is beneficial to mechanical operation, and the artificial temperature control that affects the greenhouse requires less energy consumption and has good effects. Therefore, it is widely used in Western European horticultural developed countries, and it is also introduced in my country. The disadvantage of this kind of sunshade curtain is that the aluminum foil will be corroded and damaged during use, or the aluminum coating will corrode and fall off, especially in the greenhouse with high humidity and a certain temperature, the corrosive gas in the environment is more likely to accelerate this process. The destruction process makes the whole sunshade curtain lose its effect. The protected gardening of our country rises around large and medium cities, and the pollution of urban air is constantly deteriorating. Therefore will extensively popularize advanced sun-shading curtain, must solve the corroded shedding of aluminum layer. In addition, aluminum is an excellent heat transfer body. At night, the temperature inside the greenhouse is higher than that outside, and the indoor heat (including a large amount of geothermal heat) is dissipated outside through the aluminum layer, which is not conducive to crop growth. If you want to maintain a suitable growth environment, you need to invest a certain amount of energy for manual adjustment.

For this reason, the purpose of the utility model is to provide a reflective energy-saving sunshade curtain, which mainly solves the technical problem of rusting and falling off of the aluminum layer and the technical problem of heat conduction loss.

The technical scheme that the utility model solves the problems of the technologies described above is as follows:

A reflective energy-saving sunshade curtain, comprising a curtain frame woven by radial threads and weft threads, transparent film strips and metal reflective film strips embedded in the curtain frame alternately and radially parallel, characterized in that : The metal reflective film strip is a composite reflective film strip with an aluminum layer in the middle and a transparent protective layer on the top and bottom.

The above-mentioned reflective energy-saving sunshade curtain is characterized in that: the aluminum layer of the metal reflective film strip is divided into an upper aluminum layer and a lower aluminum layer; a microporous foam layer is arranged between the upper and lower aluminum layers.

The above-mentioned reflective energy-saving sunshade curtain is characterized in that: the transparent protective layer is polyethylene, polyvinyl chloride or polyester plastic film, preferably polyethylene plastic film added with anti-ultraviolet and anti-pesticide additives.

The above-mentioned reflective energy-saving sunshade curtain is characterized in that: the transparent film strip is polyethylene, polyvinyl chloride or polyester plastic film, preferably polyester plastic film added with anti-ultraviolet auxiliary agent.

The utility model has the following advantages:

1. Both sides of the exposed aluminum layer used as a reflective sunshade are isolated from external corrosive gases by a transparent plastic protective layer, which does not affect its reflective sunshade function, and effectively prevents it from rusting and falling off, prolonging the service life.

2. The plastic protective layer can reduce the loss of heat conduction, especially adding microporous foam layers in the upper and lower aluminum layers, which blocks the heat conduction path of the aluminum layer and can effectively prevent the formation hot rays with a wavelength of 5000-10000nm from escaping. Thereby, the temperature in the greenhouse can be reduced by 4-7°C in summer, and the ground temperature can be increased by 5-8°C in winter, which saves energy, and the energy-saving rate can reach 50-80%.

3. It has a strong anti-ultraviolet effect, which not only prevents the crops from being burned; but also improves the anti-degradation ability of the plastic film, prolongs the service life and reduces the use cost.

Description of drawings:

1-3 are schematic diagrams of several appearance structures of the present utility model.

Fig. 4 is a sectional view of the cross-sectional structure of the metal reflective film strip of the present invention.

Fig. 5 is a cross-sectional view of another metal reflective film strip of the present invention.

Detailed ways:

Referring to Fig. 1-3, the utility model comprises a curtain frame 1, a transparent film strip 2 and a metal reflective film strip 3. The curtain frame 1 is woven by a radial thread 5 and a weft thread 4 according to certain rules. The radial thread 5 and the weft thread 4 can be made of cotton, linen, silk natural fibers or polyester, nylon chemical fibers, preferably chemical fibers. The transparent film strips 2 and the metal reflective film strips 3 are embedded in the curtain frame 1 alternately and radially parallel. The number of transparent film strips 2 and metal reflective film strips 3 determines the shading degree of the whole curtain, as shown in Figure 1, a transparent film strip 2 and a metal reflective film strip 3 are alternately arranged at intervals, and its shading rate is 50%; As shown in Figure 2, two transparent film strips 2 and three metal reflective film strips 3 are arranged at alternating intervals of 1+2+1+1, and its shading rate is 60%; a transparent film strip 2 and 4 as shown in Figure 3 The parallel metal reflective film strips 3 are arranged alternately and at intervals, and the shading rate is 80%. According to the required shading rate, the number of transparent film strips 2 and metal reflective film strips 3 and their arrangement positions in the curtain frame 1 can be determined to obtain products with various appearance structures. Weft threads 4 are respectively arranged on the front and back sides of each transparent film strip 2 or each metal reflective film strip 3 , so as to surround and clamp it between the two radial threads 5 . The transparent film strip 2 is made by cutting plastic films with high light transmittance, such as polyethylene (PE), polyvinyl chloride (PVC) or polyester (PET) plastic films. Such as the use of polyester with anti-UV stabilizers (such as CHIMASSOR B-994, TINUVIN234 from Ciba, LA-63, LA-68 from Japan, HORDUINN-20, N-24, N-30 light stabilizers from Germany) Plastic film, then can be made into anti-ultraviolet transparent film strip 2, and the light transmittance of its ultraviolet light is only about 2% (film strip thickness 30um), and the light transmittance of visible light is up to about 87%, both can prevent the burn of crop, Also meet the needs of photosynthesis. The metal reflective film strip 3 is a composite reflective film strip with an aluminum layer 7 (see FIG. 4 ) in the middle and a transparent protective layer 6 on the top and bottom. Transparent protective layer 6 can be the polyethylene of high light transmittance, polyvinyl chloride or polyester plastic film, especially have anti-pesticide effect and anti-ultraviolet stabilizing agent (as the composite light stabilizer 492,494 of Ciba Company) ) polyethylene plastic film is preferred. Under the protection of the transparent protective layer 6, the aluminum layer 7 neither hinders its reflection to outdoor sunlight and indoor geothermal heat rays; Harmful chemical reactions form aluminum salts which destroy the bright aluminum layer 7 . In order to reduce the heat conduction effect of the metal reflective film strip 3', the aluminum layer can be divided into an upper aluminum layer 7' (see Figure 5) and a lower aluminum layer 7", and the upper and lower aluminum layers 7', 7" are arranged between Microporous foam layer 8. The microporous foam layer 8 can be a foamed polyethylene film or polyvinyl chloride film.

Claims (5)

1. A reflective energy-saving sunshade curtain, comprising a curtain frame woven by radial threads and weft threads, transparent film strips and metal reflective film strips embedded in the curtain frame alternately and radially parallel, its characteristics The reason is that the metal reflective film strip is a composite reflective film strip with an aluminum layer in the middle and transparent protective layers on the top and bottom. 2. The reflective energy-saving sunshade curtain according to claim 1, characterized in that: the aluminum layer of the metal reflective film strip is divided into an upper aluminum layer and a lower aluminum layer; between the upper and lower aluminum layers, micro-holes are arranged. Bubble layer. 3. The reflective energy-saving sunshade curtain according to claim 1, characterized in that the transparent film strip is polyethylene, polyvinyl chloride or polyester plastic film, preferably polyester plastic film added with anti-ultraviolet additives. 4. The reflective energy-saving sunshade curtain according to claim 2, characterized in that the transparent film strip is polyethylene, polyvinyl chloride or polyester plastic film, preferably polyester plastic film added with anti-ultraviolet additives. 5. The reflective energy-saving sunshade curtain according to claim 1, 2, 3 or 4, characterized in that: the transparent protective layer is polyethylene, polyvinyl chloride or polyester plastic film, preferably added with anti-ultraviolet Polyethylene plastic film for pesticide adjuvants.

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