CN109526476A - The PO film of the double-deck air column structure and the application on greenhouse - Google Patents
The PO film of the double-deck air column structure and the application on greenhouse Download PDFInfo
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- CN109526476A CN109526476A CN201811378266.4A CN201811378266A CN109526476A CN 109526476 A CN109526476 A CN 109526476A CN 201811378266 A CN201811378266 A CN 201811378266A CN 109526476 A CN109526476 A CN 109526476A
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- Prior art keywords
- air column
- film
- horizontal
- horizontal air
- bilayer
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Ceramic Engineering (AREA)
- Protection Of Plants (AREA)
- Greenhouses (AREA)
Abstract
The present invention proposes a kind of higher PO film bilayer gas column type film of the preferable light transmittance of thermal insulation property.The double-deck air column structure includes straight air column and horizontal air column, multiple horizontal air columns are fixed between two straight air columns side by side, there is air inlet in the position that the both ends of straight air column are connected with horizontal air column, pass through thermoplastic shaping between horizontal air column and horizontal air column, perpendicular air column is set to be inflated simultaneously to horizontal air column in inflation, the uniformity of significantly very high inflation, passes through thermoplastic shaping between air column and air column；The present invention is a kind of PO film, one layer of anti-reflection film is covered outside it, anti-reflection membrane material is magnesium fluoride film, and the transmissivity in winter Clear Day greenhouse of middle PE film covering compared with the light intensity diurnal variation of cloudy two kinds of canopy films is 4.7 percentage points and 4.5 percentage points low compared with PO film difference.The greenhouse of PO film covering has the characteristics that quick heating, good heat insulation, temperature are high, in winter plant growth preferably in production.
Description
Technical field
Change the invention patent relates to thin-film material and structure and thermal insulation property is obviously improved.
Background technique
With the raising of living standard of urban and rural population level, society increasingly increases the demand of super seasonal vegetable, pushed with
The fast development of plastics horticultural facility cultivation based on vegetable production under protection, and then the market scale of PO film sharply expands.
And the research of greenhouse plays a significant role extremely frigid zones rural area.It can be improved vegetables specific yield, promote agricultural can
Sustainable development, enthusiasm of creating income of bringing along farmers, improve rural resident's living standard at placement employment.Such as in European Union member countries, plastics
The area of greenhouse and greenhouse accounts for the 74% of the gross area, and due to single thin film poor thermal insulation property the shortcomings that is obvious,
Many measures for reinforcing heat preservation are taken in actual production, as Greenhouse in North generallys use straw mat and complex heat-preservation cotton
Insulation is covered using on-inflatable plural layers and reinforces heat preservation.
Summary of the invention
The invention patent provides that a kind of thermal insulation property is preferable, and structure is simple, can reduce construction cost and extend agricultural film
Service life and improve agricultural film damping compression-resistant effect PO film greenhouse, which is the double-deck air column structure, wherein being filled with one
Quantitative air or carbon dioxide, nitrogen, oxygen mixed gas become cylindrical shape, are filled with the double-deck air column after gas
The shape of film is as shown in Figures 2 and 3, which is alternate air column film anyhow, straight air column one sealing, other end and master
It inflates road to be connected, spacing is larger between straight air column, and a plurality of horizontal air column, and the two of horizontal air column are clipped between the straight air column of every two
The place that head is connected with straight air column suffers from air inlet, and straight air column is enable to be inflated simultaneously to horizontal air column in inflation, and
Can significantly very high inflation uniformity, pass through thermoplastic shaping between horizontal air column and horizontal air column；One layer of fluorine is covered in PO thin film exterior layer
Change its thickness d of magnesium film=(λ/4.2n- λ/3.8n) wherein (n is the refractive index of film, and λ is the aerial wavelength of light).Thin
It is filled in film after gas such as the tangent extension of the multiple periodic units of Fig. 2.
Specific technical solution is as follows: a kind of PO film possessing the double-deck gas column type structure, the film is by multiple gas anyhow
Column constitutes basic unit, and then by the tangent extension of thermoplastic shaping, air column film thickness described further is 0.3~0.6mm,
Body diameter is 1.4~2.0cm after inflation, passes through thermoplastic shaping, the partial width between horizontal air column and horizontal air column between air column
For 0.15~0.2cm, it is provided with air and/or mixed gas gas in air column, it is thin to cover one layer of magnesium fluoride in PO thin film exterior layer
Film its thickness d=(λ/4.2n- λ/3.8n) is wherein (n is the refractive index of film, and λ is the aerial wavelength of light).In above-mentioned technology
On the basis of scheme, application of the present invention by the PO canopy film of the double-deck air column structure on heat preservation greenhouse.
The shortcomings that needing at night cotton-wadded quilt to cover to reach heat insulation effect for the heat insulating ability of conventional polyethylene film, this
Invention is filled with air or nitrogen, carbon dioxide, oxygen while using new material PO film outer layer covering magnesium fluoride anti-reflection film
Mixed gas (mixed gas composition is that carbon dioxide is 51.2%~60.3%, and oxygen 5%~10%, surplus is nitrogen)
Air column shape is become, the thickness of film and the light transmittance of film are effectively increased.It is scattered and disappeared when not inflated by film
Heat it is more, i.e., heat is directly transmitted to other side medium from the side of film.And transfer medium increases after being filled with gas
Air, can effectively stop the conduction, convection current and radiation of heat.Lid can not only be removed and take this process of cotton-wadded quilt, moreover it is possible to be mentioned
Rise the warming effect and translucent effect of film.
By being designed correctly the air column of size and the thickness of anti-reflection film, realizes solar irradiation and be mapped to PO film surface
When, single thin film is compared, more light can penetrate into film covering greenhouse, and small part is reflected and thin in film surface
Film self-absorption.The light that transmission is come in is absorbed, reflects and is reflected by furrow face, air, plant, equipment, then in the form of heat
Release and conduction make deep subsoil, earth's surface, air and plant keep warm, and vegetables are grown.
Specifically to the research of this patent structure and material, variety classes film same volume heat insulating ability: general thin drop
For temperature in less than 200S, temperature has just been rapidly decreased to -3 DEG C, before bubble film 400S, temperature reduce it is very fast, then, temperature
Degree reduces speed and significantly slows down, and keeps temperature to be higher than outside box -3 DEG C of temperature within some time.The cooling of air column film
Speed is then more slow, and keeps temperature-resistant substantially after 800S.At the same time in, when general thin structure
When cooling to 0 DEG C, bubble film room temperature maintains 5 DEG C above freezing, and air column film is also maintained at 9 DEG C above freezing or so, it is seen that
Air column membrane structure heat insulation effect is very significant.Identical films different volumes heat insulating ability: unit volume film drops to 0 DEG C about
For 350S, it is about 444S that 1.5 times of volume air column films, which drop to 0 DEG C, and two volumes air column film is about when dropping to 0 DEG C
548S cools to 0 DEG C of time and relative to reference cavity extends nearly 60%.And winter Clear Day and cloudy day in terms of light transmittance
The transmissivity in the greenhouse of PE film covering distinguishes low 4.7 percentage points and 4.5 compared with PO film in the light intensity diurnal variation of two kinds of canopy films relatively
Percentage point, PO film transmissivity will further increase after addition anti-reflection film, hence it is evident that be better than conventional plastic film.
Detailed description of the invention
Fig. 1: Chang Yang county's winter monthly mean temperature and Annual lowest climate temperature.
Fig. 2: PO film of the present invention structural schematic diagram anyhow, wherein 1. air inlets, 2. straight air columns, 3. horizontal air columns.
Fig. 3: PO film Experimental equipment of the present invention, wherein 1. lighting sources, 2. thin-film covering layers, 3. support film knots
Structure.
Fig. 4: the comparison diagram of PO film of the present invention and variety classes film same volume heat insulating ability.
Fig. 5: PO film of the present invention is unit volume, 1.5 times of volumes, the heat insulation effect figure under 2 times of volumes in cavity.
Specific embodiment
The technical approach of the application, which is to be directed to, to be further illustrated to heat insulating ability result of study of the invention with reference to the accompanying drawing
The county Chang Yang burns the experiment that the temperature in level ground winter carries out, as shown in Figure 1, having recorded the county Chang Yang burns level ground from the 2013-2017 winter
The monthly mean temperature and Annual lowest climate temperature in March November in season to next year find out that the two moons in 2 months annual January are extreme by figure
Temperature is minimum and temperature on average is also at compared with low state about at subzero 3 DEG C or so；Extreme temperature be about distributed in -5 DEG C~-
10 DEG C, but extreme temperature occurs less after all, and temperature on average is mostly at 0 DEG C or so, i.e., in winter when monthly mean temperature exist
0 DEG C or so the survival for seriously affecting vegetables, which even results in vegetables, to be grown.
Embodiment 1
Variety classes film same volume heat insulating ability
A kind of PO film greenhouse possessing the double-deck air column structure, the film are made of straight air column and horizontal air column, horizontal air column
Both ends be connected with straight air column place have air inlet, enable straight air column inflation when simultaneously horizontal air column is inflated,
The uniformity of significantly very high inflation, by thermoplastic shaping between horizontal air column and horizontal air column, the air column film thickness is
0.6mm, body diameter is 2.0cm after inflation, and passing through thermoplastic shaping partial width between air column is 0.16cm, setting in air column
Have air or nitrogen, carbon dioxide, oxygen mixed gas (mixed gas composition is that carbon dioxide is 58%~60%, oxygen
9%~10%, surplus is nitrogen), external to cover one layer of anti-reflection film, anti-reflection membrane material is magnesium fluoride film.This experiment base
The county Di Weichangyang guarantees to adjust room temperature at 20 DEG C or so under the premise of illumination is sufficient, removes droplet and regulating thermostatic inside thermostat
Device temperature is controlled at -3 DEG C, is kept inner air humidity identical as atmospheric humidity and is determined that its reading is normal using thermometer detection.
It installs thermometer normally to flash with equipment connection signal lamp, thermometer is put into unit volume (0.95 cubic decimeter) carton,
Temperature is recorded, then carton is put into thermostat, observes temperature change, records real time temperature.The temperature of record is imported into
It is saved in software, in the case where guaranteeing that other conditions are constant, replacement covering film successively records temperature into software.Do temperature
Time plot, length of time when comparing film thermal insulating performance and dropping to subzero 3 DEG C degrees Celsius.As seen from Figure 5 when
General thin cools to -3 DEG C about in 200S or so in the normal situation of illumination condition, and bubble film is dropped substantially less than -3
DEG C, and temperature drop rate be lower than general thin, air column film cooling rate more gently be considerably slower than general thin, and
It is kept substantially after 800S temperature-resistant.When general thin drops to 0 DEG C, air column film is at 9 DEG C above freezing or so, and bubble film is zero
Upper 5 DEG C or so.
Embodiment 2
Identical films different volumes heat insulating ability
A kind of PO film greenhouse possessing the double-deck air column structure, the film are made of straight air column and horizontal air column, horizontal air column
Both ends be connected with straight air column place have air inlet, enable straight air column inflation when simultaneously horizontal air column is inflated,
The uniformity of significantly very high inflation, by thermoplastic shaping between horizontal air column and horizontal air column, the air column film thickness is
0.6mm, body diameter is 2.0cm after inflation, and passing through thermoplastic shaping partial width between air column is 0.16cm, setting in air column
Have air or nitrogen, carbon dioxide, oxygen mixed gas (mixed gas composition is that carbon dioxide is 52%~55%, oxygen
5%~7%, surplus is nitrogen), external to cover one layer of anti-reflection film, anti-reflection membrane material is magnesium fluoride film.This experiment base
The county Di Weichangyang guarantees to adjust room temperature at 20 DEG C or so under the premise of illumination is sufficient, removes droplet and regulating thermostatic inside thermostat
Device temperature is controlled at -3 DEG C, is kept inner air humidity identical as atmospheric humidity and is determined that its reading is normal using thermometer detection.
It installs thermometer normally to flash with equipment connection signal lamp, thermometer is put into unit volume (0.95 cubic decimeter) carton,
Temperature is recorded, then carton is put into thermostat, observes temperature change, records real time temperature.The temperature of record is imported into
It is saved in software, in the case where guaranteeing that other conditions are constant, replacement bracket volume size is respectively 1.5 times, 2 times, is successively recorded
Temperature is into software.Temperature time curve figure is done, length of time when comparing film thermal insulating performance and dropping to zero degrees celsius.
It can be seen that unit volume film drops to 0 DEG C and is about by dependency graph, Fig. 5 of volume and cooling that table 1 is PO foamed film
It is about clock more than seven points that six minutes or so and 1.5 times of volume air column films, which drop to 0 DEG C, when two volumes air column film drops to 0 DEG C
About nine minutes or so, it is clear that drop to 0 DEG C than unit volume air column film when two volumes air column film drops to 0 DEG C
Time will be about 180S.Curve suppression ratio is more gentle and temperature drops to the extension with volume increase of 0 DEG C of time, it is sufficient to prove
Heat insulation effect increases with volume and is increased.
The volume of table 1PO foamed film and the dependency graph of cooling
Claims (7)
1. a kind of PO film of bilayer air column structure, which is characterized in that the double-deck air column structure includes straight air column and horizontal gas
Column is fixed with multiple horizontal air columns between two straight air columns side by side, and there is air inlet in the position that one end of straight air column is connected with horizontal air column, separately
The position seals that one end is connected with horizontal air column pass through thermoplastic shaping between horizontal air column and horizontal air column.
2. the PO film of bilayer air column structure according to claim 1, which is characterized in that covering one outside the PO film
Layer anti-reflection film, anti-reflection membrane material are magnesium fluoride film, anti-reflection film with a thickness of d=(λ/4.2n- λ/3.8n), wherein n is PO film
Refractive index, λ be the aerial wavelength of light.
3. the PO film of bilayer air column structure according to claim 1, which is characterized in that the PO of the bilayer air column structure
Film thickness is 0.3 ~ 0.6mm, and air column diameter is 1.4 ~ 2.0cm after inflation.
4. the PO film of bilayer air column structure according to claim 1, which is characterized in that lead between horizontal air column and horizontal air column
Thermoplastic shaping is crossed, the partial width between horizontal air column and horizontal air column is 0.15 ~ 0.2cm.
5. the PO film of bilayer air column structure according to claim 1, which is characterized in that in the straight air column and horizontal air column
It is provided with air or mixed gas, mixed gas composition is that carbon dioxide is 51.2% ~ 60.3%, oxygen 5% ~ 10%, and surplus is
Nitrogen.
6. the PO film of bilayer air column structure according to claim 1, which is characterized in that the anti-reflection film is magnesium fluoride
Film.
7. application of the PO film of bilayer air column structure according to claim 1-5 on greenhouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811378266.4A CN109526476B (en) | 2018-11-19 | 2018-11-19 | PO film with double-layer gas column structure and application of PO film to greenhouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811378266.4A CN109526476B (en) | 2018-11-19 | 2018-11-19 | PO film with double-layer gas column structure and application of PO film to greenhouse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109526476A true CN109526476A (en) | 2019-03-29 |
| CN109526476B CN109526476B (en) | 2021-05-18 |
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ID=65848249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811378266.4A Active CN109526476B (en) | 2018-11-19 | 2018-11-19 | PO film with double-layer gas column structure and application of PO film to greenhouse |
Country Status (1)
| Country | Link |
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| CN (1) | CN109526476B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111448916A (en) * | 2020-04-10 | 2020-07-28 | 温州鑫锐翔科技有限公司 | Agricultural windproof and shockproof plastic greenhouse |
| CN115606434A (en) * | 2022-12-13 | 2023-01-17 | 中国建筑设计研究院有限公司 | Carbon circulation method for inflatable greenhouse |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111448916A (en) * | 2020-04-10 | 2020-07-28 | 温州鑫锐翔科技有限公司 | Agricultural windproof and shockproof plastic greenhouse |
| CN115606434A (en) * | 2022-12-13 | 2023-01-17 | 中国建筑设计研究院有限公司 | Carbon circulation method for inflatable greenhouse |
| CN115606434B (en) * | 2022-12-13 | 2023-03-10 | 中国建筑设计研究院有限公司 | Carbon circulation method for inflatable greenhouse |
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