CN105850595A - Bubbly plastic heat-preservation shed film - Google Patents

Bubbly plastic heat-preservation shed film Download PDF

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Publication number
CN105850595A
CN105850595A CN201610335148.XA CN201610335148A CN105850595A CN 105850595 A CN105850595 A CN 105850595A CN 201610335148 A CN201610335148 A CN 201610335148A CN 105850595 A CN105850595 A CN 105850595A
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CN
China
Prior art keywords
shed
heat
bubble
film
preservation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610335148.XA
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Chinese (zh)
Inventor
李尚明
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201610335148.XA priority Critical patent/CN105850595A/en
Publication of CN105850595A publication Critical patent/CN105850595A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Greenhouses (AREA)
  • Protection Of Plants (AREA)

Abstract

The invention discloses a heat preservation technique of a shed film for a sunlight greenhouse. At present, all shed films for a sunlight greenhouse/shed do not have a heat preservation function; therefore, in order to keep a temperature in the shed, a heat-preservation quilt for the shed is needed for coverage for heat preservation at night; however, in winter in the north of China, even though the heat-preservation quilt is used for the coverage, the sunlight greenhouse/shed cannot be still used; as the weather is cold in winter in the north of China, even though sunlight exists by day, a temperature difference between the interior and the exterior of the shed is also quite big; as the shed film does not have the heat preservation function, heat coming in through irradiation dissipates immediately; no heat can be preserved at night. According to the heat preservation technique of the shed film for the sunlight greenhouse, a plastic air-bubble bubbly shed film is produced by utilizing the heat preservation performance of air; the plastic air-bubble bubbly shed film can realize light-transmission and heat-preservation; not only is the heat-preservation quilt for the shed discarded, but also the plastic air-bubble bubbly shed film can be used similarly even in winter in the north of China; methods for mounting and using the plastic air-bubble bubbly shed film are nearly completely the same with methods for mounting and using the existing shed films.

Description

Blister plastic, thermal-insulation canopy film
Technical field
The present invention relates to solve sunlight greenhouse canopy film daylighting and the problem of insulation.
Technical background
At present in agricultural production, in order to adapt to crop growth, and improving the method that ambient temperature taked is to use plastics big Canopy.Owing to the heat transfer coefficient of plastic foil is big, daytime, canopy internal-external temperature difference was little, and the temperature in canopy is enough, but to inside and outside night canopy The temperature difference is big, and therefore the heat in canopy has passed to outside canopy soon, so the temperature in canopy is just not suitable for production estimation.
In order to solve the insulation problem of canopy film, use now the way stoping heat radiation to leak, in canopy film, i.e. add insulation Agent.The method only improves some temperature, does not solve root problem, in order to make the temperature in canopy at night also can suitable crops Growth, can only covering and heat insulating insulation.In the north of China, if to utilize sunlight greenhouse hot house to carry out agricultural in the winter time During production, even if covering and heat insulating is not reached the requirement of crop growth yet.
The transmission of heat has three kinds of approach, if this object is gas or liquid, it is maximum that the mode of convection current transmits heat, If this object is solid, it is maximum that the mode of heat conduction transmits heat, and only during vacuum, radiation transmission heat is maximum.
Being gas in canopy in this problem, canopy film is solid, and due to the convection current of air and hot-air upwards, hot-air is not Discontinuously to flowing at canopy film, owing to canopy film is the thinnest thus thermal resistance is the least and heat transmission is too big, the heat that daytime stores, to evening Between scatter and disappear to the greatest extent soon, it is therefore desirable to insulating quilt for greenhouse is incubated.
In northern China winter, even if temperature outdoor when having sunshine is the lowest, canopy film daylighting while dispelling the heat, in canopy almost Heat is not had to store, therefore, even if having the best insulation quilt without Wen Kebao to night yet.
Summary of the invention
The problem to be solved in the present invention is canopy film problem of few heat radiation to greatest extent while daylighting.The heat conductivity of general canopy film It is: 0.2w/mk that its heat conduction amount (calculating carry-over factor) is: 2000w/ (m2K), owing to the heat conductivity of air is little and heat Change has gradient, thus its heat output cannot simple Theoretical Calculation, its carry-over factor can only be measured by actual environment.
It is known that its heat conductivity of the air of not convection current is: 0.024w/mk.Therefore, if by plastic production 24 millimeters thick The not double-deck canopy film of convected air, its Theoretical Calculation carry-over factor is: 1w/ (m2k).There is the thermal insulation greenhouse film of such performance, i.e. Making the winter in northern China, generally, the booth using this thermal insulation greenhouse film to make can be carried out agricultural production.This Technology is characterized in that of invention glues pressure last layer plastic air bubble on one side or the two sides of canopy film, according to insulation and use requirement, Its bubble is changeable.
It is true that owing to air is flowing, generally also inevitable convection current in bubble, so cannot be by theory point The method of analysis calculates the thermal resistance of blister canopy film, can only be detected by experiment.Experimental result is: the carry-over factor of existing canopy film is 8w/(m2k)；In canopy film one side, its carry-over factor of canopy film of one layer of bubble of viscous pressure is: 6.8w/ (m2k)；On the two sides of canopy film respectively Its carry-over factor of canopy film of one layer of bubble of viscous pressure is: 3.2w/ (m2k).Thus analyze, the size and shape of bubble is adjusted to Good state, and when two-layer canopy film is share, its heat transfer coefficient can be at 1w/ (m2K) left and right.Therefore, even if in winter of northern China In season, generally, the booth using this thermal insulation greenhouse film to make can be carried out agricultural production.
Accompanying drawing explanation
Fig. 1 is at canopy film (booth) outside one layer of plastic air bubble of viscous pressure, and Fig. 2 is at canopy film another side (booth) The inside one layer of plastic air bubble of viscous pressure.
Detailed description of the invention
1, the way at canopy film one side one layer of bubble of viscous pressure is, on the basis of existing canopy membrane technology, at (booth is outer) of canopy film The plastic air bubble of the viscous pressure of one side one layer shape and size as shown in Figure 1, the material of plastic air bubble selects with light transmittance high Being main, its thickness is that 1/10th of canopy film thickness is advisable.
2, on canopy film two sides, the way of each viscous one layer of bubble of pressure is, way such as Fig. 2 institute of the one layer of bubble in (booth) of canopy film the inside Showing shape and size, it is also the material requirement identical with existing canopy membrane technology that the material of this bubble requires；(booth) of canopy film outward The way shape and size as shown in Figure 1 of the one layer of bubble in face, the material of this bubble selects all strong with machinery with the material of canopy film itself Degree height and the more a height of master of light transmittance, the thickness of canopy film upper and lower two-layer bubble is all that 1/10th of canopy film thickness is advisable.

Claims (2)

1. the present invention technology is characterized in that on the basis of existing canopy membrane technology, glue compression molding material in the one side of canopy film or two sides empty Bubble steeps.
Plastic air bubble the most according to claim 1, it is characterised in that: this bubble be one layer by certain rule and size The bubble of arrangement.
CN201610335148.XA 2016-05-16 2016-05-16 Bubbly plastic heat-preservation shed film Pending CN105850595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610335148.XA CN105850595A (en) 2016-05-16 2016-05-16 Bubbly plastic heat-preservation shed film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610335148.XA CN105850595A (en) 2016-05-16 2016-05-16 Bubbly plastic heat-preservation shed film

Publications (1)

Publication Number Publication Date
CN105850595A true CN105850595A (en) 2016-08-17

Family

ID=56635444

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610335148.XA Pending CN105850595A (en) 2016-05-16 2016-05-16 Bubbly plastic heat-preservation shed film

Country Status (1)

Country Link
CN (1) CN105850595A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108476809A (en) * 2018-03-16 2018-09-04 三峡大学 A kind of plastic greenhouse film possessing bubble structure and its application
CN108841554A (en) * 2018-08-04 2018-11-20 华阴市哲远酒业有限公司 A kind of preparation process of persimmon wine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2592551Y (en) * 2003-01-13 2003-12-17 赵泽兴 Composite film
CN103650997A (en) * 2012-09-21 2014-03-26 天津丰华兴农农作物种植专业合作社 Greenhouse heat preservation quilt

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2592551Y (en) * 2003-01-13 2003-12-17 赵泽兴 Composite film
CN103650997A (en) * 2012-09-21 2014-03-26 天津丰华兴农农作物种植专业合作社 Greenhouse heat preservation quilt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108476809A (en) * 2018-03-16 2018-09-04 三峡大学 A kind of plastic greenhouse film possessing bubble structure and its application
CN108841554A (en) * 2018-08-04 2018-11-20 华阴市哲远酒业有限公司 A kind of preparation process of persimmon wine

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Application publication date: 20160817